CN121752182A - Optical volume change recording method measurement device and optical blood pressure measurement device - Google Patents

Abstract

The invention provides a photoplethysmography (Photoplethysmography, PPG) measuring device, which comprises an outer shell, an inner shell, a first magnetic unit, a second magnetic unit and an optical signal module, wherein the inner shell is coupled with the outer shell and can relatively move between the inner shell and the outer shell, a containing space is arranged between the outer shell and the inner shell so as to contain an object to be measured, the space size of the containing space is changed along with the relative movement between the outer shell and the inner shell, the first magnetic unit is arranged on the outer shell outer side surface of the outer shell, the second magnetic unit is arranged on the inner shell inner side surface of the inner shell, and the optical signal module is coupled with the outer shell and is configured to measure the object to be measured, and magnetic acting force is arranged between the first magnetic unit and the second magnetic unit and drives the space size of the containing space to be matched with the object size of the object to be measured.

Description

Photoplethysmography measuring device and optical blood pressure measuring device Technical Field

The present invention relates to the field of optical measurement, and more particularly, to a photoplethysmography (Photoplethysmography, PPG) measurement device and techniques for an optical blood pressure measurement device.

Background

Photoplethysmography (Photoplethysmography, PPG) features a method of energy measurement and calculation of blood pressure. However, if the PPG characteristic is used for measurement and calculation, the PPG characteristic waveform may be highly unstable when the object itself is under pressure and the surrounding area thereof. The PPG signature not only varies continuously, but also varies significantly from waveform to waveform, even though the PPG signature may also exhibit a tendency to fade. It is therefore important how to reduce the pressure to which the object being measured is subjected.

Disclosure of Invention

The present invention has been made in view of the above-mentioned problems, and provides a PPG measurement device and an optical blood pressure measurement device.

In order to solve the above problems, in a first aspect of the present invention, the PPG measurement module includes an outer housing, an inner housing coupled to the outer housing and relatively movable between the inner housing and the outer housing, wherein a space is included between the outer housing and the inner housing to accommodate an object to be measured, and a space dimension of the space is changed along with the relative movement between the outer housing and the inner housing, a first magnetic unit disposed on an outer side surface of the outer housing, a second magnetic unit disposed on an inner side surface of the inner housing, and an optical signal module coupled to the outer housing and configured to measure the object to be measured, wherein the first magnetic unit and the second magnetic unit have a magnetic force therebetween, and the magnetic force drives the space dimension of the space to adapt to an object dimension of the object to be measured.

In some embodiments of the first aspect of the present invention, the optical signal module is configured to receive a detection light after measuring the object to be measured by an emission light or configured to emit the emission light, and the emission light has a light emitting wavelength, and the light emitting wavelength is selected according to an influence amount of the blood oxygen concentration on the light absorptivity.

In some embodiments of the first aspect of the present invention, the emission wavelength is selected from a low blood oxygen influence optical band in which the light absorption rate is not influenced by the blood oxygen concentration.

In some embodiments of the first aspect of the present invention, the housing further comprises an outer cover coupled to the outer housing to form a first component assembly, and an inner cover coupled to the inner housing to form a second component assembly, wherein the accommodating space is formed between the inner cover and the inner housing.

In some embodiments of the first aspect of the present invention, the inner housing further comprises an inner housing base coupled to the inner cover, wherein the accommodating space is formed by the inner housing base and the inner cover, and the first element is combined to cover the inner housing base and the inner cover, and an elastic tab protruding outwards from one of two sides of the inner housing base and extending along the outer housing outer side surface of the outer housing to cover the outer housing, wherein the second magnetic unit is disposed on a tab inner side surface of the elastic tab, one of an elastic force and the magnetic force of the elastic tab drives the outer housing toward the outer cover, so that the space size of the accommodating space is adapted to the object size of the object to be tested, and a pressure applied by the inner cover to the object to be tested is reduced through interaction between the magnetic force and the elastic force.

In some embodiments of the first aspect of the present invention, the outer housing includes a first sliding portion, the outer cover includes a second sliding portion, and the first sliding portion is slidably coupled to the second sliding portion, so that the first sliding portion and the second sliding portion can move relatively to each other to adjust the space size of the accommodating space.

In some embodiments of the first aspect of the present invention, the first sliding portion includes a first sliding shaft and a first sliding rail, the second sliding portion includes a second sliding rail, the first sliding shaft is slidably coupled to the second sliding rail such that the first sliding shaft is slidable in a first sliding direction in the second sliding rail, and the connecting shaft is slidably coupled to the first sliding rail such that the connecting shaft is slidable in a second sliding direction in the first sliding rail.

In some embodiments of the first aspect of the present invention, the second element assembly has an opening and a joint, and the inner surface of the inner shell has an inclination angle in a front-rear direction along the opening to the joint, so that an opening cross-sectional area of the accommodating space at the opening is larger than a joint cross-sectional area of the joint.

In some embodiments of the first aspect of the present invention, the joint portion has a joint plane, a middle of the inner side surface of the inner case has a middle oblique line along the front-rear direction, and the middle oblique line has the oblique angle of 3-7 degrees with a normal line of the joint plane.

In some embodiments of the first aspect of the present invention, the inner shell inner side surface includes an inner shell friction portion adjacent to the accommodation space, and the inner shell friction portion has a higher friction coefficient than other portions of the inner shell inner side surface.

In order to solve the above problems, in a second aspect of the present invention, the optical blood pressure measurement device includes a magnetic levitation measurement device, wherein the magnetic levitation measurement device is a PPG measurement device according to some embodiments of the first aspect of the present invention, and an operation module coupled to the magnetic levitation device for calculating a blood pressure data according to a measurement signal obtained by the magnetic levitation device.

Drawings

Various aspects of the invention may be best understood from the following detailed disclosure and the accompanying drawings. The various features are not drawn to scale. The dimensions of the various features may be arbitrarily increased or decreased for clarity of discussion.

FIG. 1 illustrates a block diagram of an optical physiological signal measuring device, in accordance with one or more techniques of the present disclosure.

Fig. 2 shows a schematic diagram of the absorption spectra of the emitted light in HbO ₂ and Hb, respectively, in accordance with one or more techniques of the present disclosure.

Fig. 3A and 3B are schematic diagrams showing PPG signal waveforms of an object to be tested and its surroundings, respectively, under no pressure and with pressure applied, according to one or more techniques of the present disclosure.

FIG. 4A illustrates a perspective view of an optical physiological signal measuring device illustrated in FIG. 1 in measuring an object under test, in accordance with one or more techniques of the present disclosure.

Fig. 4B shows a perspective view of the clip-on measuring device illustrated in fig. 4A, in accordance with one or more techniques of the present disclosure.

FIG. 5 shows an exploded view of the clip-on measuring device illustrated in FIG. 4B along a combined direction, in accordance with one or more techniques of the present disclosure.

Fig. 6A-6C illustrate perspective views of the outer cover, outer housing, and joint illustrated in fig. 5, respectively, in accordance with one or more techniques of the present disclosure.

Fig. 7A shows a top view of the clip-on measuring device illustrated in fig. 4B, in accordance with one or more techniques of the present disclosure.

FIG. 7B shows a cross-sectional view of the clip-on measurement device taken along line C1-C1 of FIG. 7A, in accordance with one or more techniques of the present disclosure.

Fig. 7C shows an enlarged view of the area E1 illustrated in fig. 7B, in accordance with one or more techniques of the present disclosure.

FIG. 7D illustrates a cross-sectional view of the clip-on measuring device illustrated in FIG. 7B after the inner cover and the inner housing are moved relative to one another in the combined direction, in accordance with one or more techniques of the present disclosure.

FIG. 8A shows a cross-sectional view of a clip-on measurement device taken along line C2-C2 of FIG. 7A, in accordance with one or more techniques of the present disclosure.

FIG. 8B illustrates a schematic view of the clip-on measuring device illustrated in FIG. 8A as the receiving space expands, in accordance with one or more techniques of the present disclosure.

Fig. 9 shows a perspective view of another clip-on measurement device 500, in accordance with one or more techniques of the present disclosure.

FIG. 10A illustrates a perspective view of a ring-type metrology device in accordance with one or more techniques of the present disclosure.

FIG. 10B is a schematic diagram illustrating the ring-type measuring device illustrated in FIG. 10A in measuring an object under test, according to one or more techniques of the present disclosure.

Fig. 11A shows a schematic view of the hoop element illustrated in fig. 10A in a flattened state, in accordance with one or more techniques of the present disclosure.

Fig. 11B shows a perspective view of the loop element illustrated in fig. 10A in an annular state, in accordance with one or more techniques of the present disclosure.

Fig. 11C shows a perspective view of the optical signal module illustrated in fig. 10A, in accordance with one or more techniques of the present disclosure.

FIG. 12 is a schematic illustration of the material of the loop element illustrated in FIG. 10A, according to one or more techniques of the present disclosure.

Fig. 13 shows an enlarged view of the area E2 illustrated in fig. 10B, in accordance with one or more techniques of the present disclosure.

FIG. 14A shows a perspective view of another ring-type metrology device in accordance with one or more techniques of the present disclosure.

FIG. 14B shows a top perspective view of the ring-type measuring device illustrated in FIG. 14A, in accordance with one or more techniques of the present disclosure.

FIG. 15A shows a top perspective view of the ring-type measuring device illustrated in FIG. 14A, in accordance with one or more techniques of the present disclosure.

FIG. 15B shows a cross-sectional view of the ring-type measuring device taken along line C3-C3 of FIG. 15A, in accordance with one or more techniques of the present disclosure.

Detailed Description

The following disclosure contains specific information pertaining to exemplary embodiments in the present disclosure. The drawings in the present disclosure and their accompanying detailed disclosure are directed to merely exemplary embodiments. However, the present disclosure is not limited to only these exemplary embodiments. Other variations and embodiments of the present disclosure will occur to those skilled in the art. Unless otherwise indicated, identical or corresponding elements in the drawings may be denoted by identical or corresponding reference numerals. Moreover, the drawings and illustrations in the present disclosure are generally not drawn to scale nor necessarily correspond to actual relative dimensions.

For purposes of consistency and ease of understanding, similar features are identified by numerals in the exemplary figures (although not shown in some examples). However, features in different embodiments may differ in other respects and therefore should not be narrowly limited to what is shown in the drawings.

The present disclosure uses the phrases "in one embodiment," "in some embodiments," and the like, which may each refer to one or more of the same or different embodiments. The term "coupled" is defined as either a direct connection or an indirect connection through intervening elements, and is not necessarily limited to a physical connection. The term "comprising" means "including but not necessarily limited to" that it specifically indicates an open ended inclusion or member in a combination, group, series, and equivalent described above.

Furthermore, for purposes of explanation and not limitation, specific details are set forth such as functional entities, techniques, protocols, standards, etc. to provide an understanding of the described techniques. In other instances, detailed disclosure of well-known methods, techniques, systems, architectures, etc. have been omitted so as not to obscure the disclosure with unnecessary detail.

FIG. 1 shows a block diagram of an optical physiological signal measuring device 1, according to one or more techniques of the present disclosure. The optical physiological signal measuring device 1 includes an operation module 110 and an optical module 120. The operation module 110 and the optical module 120 may be coupled by a wire or wirelessly. Fig. 1 shows an example of an optical physiological signal measuring device 1. The optical physiological signal measuring device 1 may include more or less elements than the icons, or different configurations of elements having various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

In some embodiments, the optical physiological signal measuring device 1 can be used to measure various physiological data. The physiological data may include at least one of a blood pressure data, an oxygen concentration data, a blood flow rate data, a blood viscosity data, and other physiological data. In some embodiments, when the physiological data is the blood pressure data, the optical physiological signal measuring device 1 may be an optical blood pressure measuring device. In some embodiments, the optical physiological signal measuring device 1 can measure various physiological data by a photoplethysmography (Photoplethysmography, PPG) measurement method. Therefore, the optical physiological signal measuring device 1 can also be used as a PPG measuring device.

The computing module 110 may be an electronic device that may include any device configured to control the optical module 120 and receive the measurement results. The optical module 120 may be an optical device for emitting an emitted light with a wavelength of a light, receiving a detection light after PPG measurement of the emitted light, and transmitting the measurement result to the operation module 110. The computing module 110 may communicate with the optical module 120 via a communication medium by wired or wireless means to calculate the physiological data including the blood pressure data according to the detected light.

The computing module 110 may be a mobile phone, tablet computer, desktop computer, notebook computer, server, network computing system, or other electronic device. The operational module 110 may include more or fewer elements than shown or have different configurations of the various elements shown.

The operational module 110 may be implemented as any of a variety of suitable processing circuits, such as one or more microprocessors, central processing units (central processing unit, CPUs), graphics processing units (graphics processing unit, GPUs), system-on-a-chips (socs), digital signal processors (DIGITAL SIGNAL processors, DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), discrete logic, software, hardware, firmware, or any combination thereof. When implemented in part in software, the apparatus may store a program of computer-executable instructions having the software in a suitable non-transitory computer-readable medium and execute the computer-executable instructions in hardware using one or more processors to perform the disclosed methods.

The computing module 110 and the optical module 120 may utilize custom protocols or conform to existing or in fact standards including, but not limited to, ethernet, IEEE 802.11 or IEEE 802.15 family, wireless USB or telecommunications standards including, but not limited to, global System for Mobile communications (Global System for Mobile Communications, GSM), code Division multiple Access 2000 (Code-Division Multiple Access 2000, CD MA2000), time Division synchronous Code Division multiple Access (Time Division Synchronous Code Division Multiple Access, TD-SCDMA), global microwave Access interoperability (Worldwide Interoperability for Microwave Access, wiMAX), third Generation partnership Long Term Evolution (Third Generation Partnership Project Long-Term Evolution,3 GPP-LTE) or Time Division LTE (Time Division LTE, TD-LTE). The computing module 110 and the optical module 120 may each include a processor configured to transmit and/or store the measurement results over a communication medium and to receive the measurement results over the communication medium.

The computing module 110 may include a computer system interface that enables the plurality of detected images to be stored on or received from a storage device. For example, the operational module 110 may include a chipset supporting bus protocols for peripheral component interconnect (PERIPHERAL COMPONENT INTERCONNECT, PCI) and peripheral component interconnect express (PERIPHERAL COMPONENT INTERCONNECT EXPRESS, PCIe), proprietary bus protocols, universal serial bus (Universal Serial Bus, USB) protocols, inter-INTEGRATED CIRCUIT, I2C protocols, or any other logical and physical architecture that may be used to interconnect peer devices.

The optical module 120 may further include a light source module 121 and a light measuring module 122. In some embodiments, when the optical physiological signal measuring device 1 is used as a PPG measuring device, the optical module 120 may also be used as a PPG measuring module. Therefore, the light source module 121 can be a PPG light source module for emitting emitted light for PPG measurement, and the light measuring module 122 can be a PPG light measuring module for receiving a detection light. The detection light may be an optical signal that the emitted light changes after PPG measurement is performed.

The emitted light has a wavelength of light. In order to make the physiological data of the detection light after PPG measurement not affected by the change of blood oxygen concentration, the light emitting wavelength of the emitted light can be selected from a low blood oxygen affecting light band so as to avoid unnecessary deviation values of the physiological data caused by the change of blood oxygen concentration. In some embodiments, the hypoxemia-affecting optical band comprises a plurality of optical wavelengths of the emitted light having the same or similar light absorption coefficient among a plurality of objects under test of different blood oxygen concentrations. Therefore, when the emission wavelength is selected from the hypoxemia-affecting optical band, the emitted light has the same or similar light absorption coefficient for different objects to be measured having different blood oxygen concentrations. In some embodiments, the object to be measured may include a fingertip, knuckle, wrist, arm, forehead, temple, ear or other body part of the subject.

In some embodiments, when the optical module 120 of the PPG measurement module is used to measure the blood pressure data, if the emission wavelength of the emitted light is selected from the low blood oxygen-affected optical band, the emitted light can reduce the light absorption coefficient of the plurality of objects to be measured from the plurality of blood oxygen concentrations. Therefore, no matter the blood oxygen concentration, the detection light is not easy to absorb unequal light energy due to the object to be detected with different blood oxygen concentrations, so that the deviation value of the blood pressure data can be reduced by selecting the light emitting wavelength.

In the optical module 120, the blood oxygen concentration data may be calculated for the absorption difference of the emitted light having the emission wavelength by Hemoglobin (Hemoglobin) of different types in blood. In normal blood, heme is mainly oxyheme (Oxygenated Hemoglobin, hbO ₂) and deoxyheme (Deoxygenated Hemoglobin, hb). Fig. 2 shows a schematic diagram of the absorption spectra of the emitted light in HbO ₂ and Hb, respectively, in accordance with one or more techniques of the present disclosure. According to fig. 2, it is shown that at different light wave wavelengths, the emitted light has respective light absorption coefficients for HbO ₂ and Hb. When the light absorption coefficient is higher, the object to be measured has higher light absorption rate for the emitted light.

At a plurality of specific wavelengths of light, the absorption spectrum of HbO ₂ will just coincide with the absorption spectrum of Hb to create a plurality of spectral intersections. In these spectral intersections, the light absorption coefficient of the emitted light at HbO ₂ will be exactly equal to the light absorption coefficient of Hb, and therefore the light absorption of the emitted light at HbO ₂ will also be exactly equal to the light absorption of Hb. In some embodiments, the spectral intersections may include, but are not limited to, light wavelengths of 390nm, 422nm, 452nm, 500nm, 530nm, 546nm, 570nm, 584nm, and 796 nm.

When the light absorption coefficient of the emitted light having one specific light wavelength of the specific light wavelengths at HbO ₂ is equal to the light absorption coefficient of Hb, the concentration ratio of HbO ₂ to Hb of the plurality of objects to be measured does not affect the light absorption coefficient of the emitted light at the plurality of objects to be measured. In other words, when the light emitting wavelength of the emitted light is one specific light wavelength of the specific light wavelengths, the blood oxygen concentration does not affect the light absorption coefficient of the emitted light in the objects to be measured, so that the detected light can exclude the influence of the blood oxygen concentration on the light absorption coefficient and thus the measurement accuracy of the physiological data. Therefore, when the light emission wavelength of the emitted light is one specific light wavelength of the specific light wavelengths, the emitted light has the same light absorption coefficient in the objects to be measured with different blood oxygen concentrations. In some embodiments, the plurality of specific light wave wavelengths may be a plurality of blood oxygen free influence wavelengths. In some embodiments, the spectral intersections may also include a dense plurality of intersections in an optical band having a wavelength between 260nm and 344 nm. In other words, in the optical band between 260nm and 344nm, the emitted light has a light absorption coefficient with a very small gap among the plurality of objects to be measured of different blood oxygen concentrations.

In a portion of the optical band, the absorption spectrum of HbO ₂ will be higher than that of Hb. In these partial optical bands, the light absorption coefficient of the emitted light at HbO ₂ is greater than that of Hb. In some embodiments, the partial optical bands may include, but are not limited to, optical bands having wavelengths of 390nm-422nm, 452nm-500nm, 530nm-546nm, 570nm-584nm, and 796nm-1000 nm.

In another portion of the optical band, hbO ₂ will have an absorption spectrum that is lower than Hb. In the other portion of the optical band, the light absorption coefficient of the emitted light at HbO ₂ may be smaller than the light absorption coefficient of Hb. In some embodiments, the other portion of the optical wavelength band may include, but is not limited to, an optical wavelength band having an optical wavelength of 422nm-452nm, an optical wavelength band of 500nm-530nm, an optical wavelength band of 546nm-570nm, and an optical wavelength band of 584nm-796 nm.

In performing PPG measurements, the emitted light as PPG signal is affected by the different light absorption coefficients of Hb and HbO ₂. Therefore, to reduce the PPG signal variation caused by the blood oxygen variation, the emission wavelength of the emitted light may be selected from the low blood oxygen-affecting optical band, that is, the light wavelengths at or near the spectral intersections on the absorption spectra of Hb and HbO ₂. Since the number of the spectrum intersection points is greater than 1, the hypoxia-affected optical band may include a plurality of sub-hypoxia-affected optical bands. Each sub-hypoxemia-affecting optical band includes a corresponding one of the non-hypoxemia-affecting wavelengths and a plurality of hypoxemia-affecting wavelengths proximate to the corresponding one of the non-hypoxemia-affecting wavelengths. In some embodiments, since the spectrum intersection points are the wavelengths without blood oxygen influence, the wavelengths of light adjacent to the spectrum intersection points may each be the wavelength with blood oxygen influence.

In some embodiments, the plurality of hypoxemia-affecting wavelengths may include a plurality of similar light wavelengths that are offset by a wavelength offset value from the spectral intersection points. In other words, in some embodiments, the plurality of hypoxemia-affecting wavelengths may include the plurality of similar light wavelengths that add or subtract the wavelength offset value based on the non-hypoxemia-affecting wavelengths. In some embodiments, the wavelength deviation value may be any value between 1-5 nm. In some embodiments, the light wave deviation value is no greater than 30nm.

In some embodiments, the plurality of hypoxemia influencing wavelengths may include a plurality of similar light wavelengths having a plurality of similar absorption coefficients for the emitted light among the plurality of objects under test having different blood oxygen concentrations. In other words, in some embodiments, the plurality of hypoxemia-affecting wavelengths may include the plurality of similar light wavelengths that are close to the non-hypoxemia-affecting wavelengths and have the plurality of similar absorption coefficients. In some embodiments, when an absorption coefficient difference between different light absorption coefficients of the plurality of objects to be measured with different blood oxygen concentrations of the emitted light is smaller than a deviation threshold, the emitted light wavelength of the emitted light is considered to belong to the plurality of similar light wavelengths. In some embodiments, the difference in absorption coefficient may be represented by a ratio of differences in light absorption coefficients of the plurality of objects to be measured of the emitted light at different blood oxygen concentrations. In some embodiments, the absorption coefficient difference may be represented by a ratio of the difference in the light absorption coefficients of HbO ₂ and Hb. In some embodiments, the deviation threshold may be 5% -30%. Therefore, when the deviation threshold value may be 10%, the emission wavelength belongs to the plurality of similar light wave wavelengths as long as the difference ratio of the light absorption coefficient of HbO ₂ to the light absorption coefficient of Hb of the emission light having the emission wavelength is less than or equal to 10%. In some embodiments, the plurality of similar lightwave wavelengths surrounding the non-blood oxygen influencing wavelength may be determined directly by the ratio of the difference in the light absorption coefficient of HbO ₂ to the light absorption coefficient of Hb.

For example, the emitted light has a first light absorption rate and a first light absorption coefficient under a first object to be measured having a first blood oxygen concentration, and the emitted light has a second light absorption rate and a second light absorption coefficient under a second object to be measured having a second blood oxygen concentration. The first blood oxygen concentration is different from the second blood oxygen concentration. In some embodiments, when the difference between the first light absorption rate and the second light absorption rate is smaller than an absorption rate deviation threshold, the light emission wavelength belongs to the plurality of similar light wave wavelengths. The absorbance deviation threshold may be 3% -10%. In another embodiment, when the difference between the first light absorption coefficient and the second light absorption coefficient is smaller than an absorption coefficient deviation threshold, the light emitting wavelength belongs to the plurality of similar light wave wavelengths. The absorption coefficient deviation threshold may be 5% -30%. In another example, the emitted light has a third light absorption rate and a third light absorption coefficient in HbO ₂ and a fourth light absorption rate and a fourth light absorption coefficient in Hb. In some embodiments, when the difference between the third light absorptance and the fourth light absorptance is smaller than the absorptance deviation threshold, the emission wavelength belongs to the plurality of similar light wavelengths. In another embodiment, when the difference between the third light absorption coefficient and the fourth light absorption coefficient is smaller than the absorption coefficient deviation threshold, the light emitting wavelength belongs to the plurality of similar light wave wavelengths.

When the optical module 120 performs various physiological data through the PPG, the optical module 120 may include a reflective optical module and a transmissive optical module. In some embodiments, when the optical module 120 is a reflective optical module, the reflective optical module has a larger alternating current (ALTERNATING CURRENT, AC) signal and a distinct characteristic signal for PPG signals with shorter wavelengths. In addition, the distance from the light source module 121 to the light measuring module 122 of the reflective optical module is generally shorter, which helps to reduce the influence of the movement artifact (Motion Artifacts). Therefore, the light source module 121 of the reflective optical module can select a light emission wavelength of a shorter wavelength in the low blood oxygen variation affecting light band. For example, the wavelength of the light wave in the sub-hypoxemia-affecting light band around the blood-oxygen-free affecting wavelength can be arbitrarily selected as the emission wavelength of the emitted light in a wavelength band below 620 nm.

In other embodiments, when the optical module 120 is a transmissive optical module, since the emitted light with a shorter wavelength is more easily absorbed by the objects to be tested, the emitted light can select a light wavelength with a longer wavelength as the emitted light wavelength, so that the emitted light can be transmitted through the objects to be tested, for example, the light wavelength in the sub-hypoxemia variation affecting light band around the non-hypoxemia affecting wavelength can be arbitrarily selected as the emitted light wavelength of the emitted light in a wavelength band above 750 nm.

As can be seen from FIG. 2, the wavelength band above 750nm has only one spectral intersection, which is the light wavelength at 796 nm. In other words, the hypoxia-affected optical band may include only one sub-hypoxia-affected optical band, which is predominantly at a light wavelength of 796 nm. In some embodiments, the ratio of the difference in the light absorption coefficient of HbO ₂ to the light absorption coefficient of Hb is low in the light band of 796nm-800 nm. Even under different measurement methods, the spectral intersection point may be measured and identified as a wavelength of 800 nm. Thus, the hypoxemia-affecting optical band may include 796nm as the non-hypoxic affecting wavelength and multiple similar optical wavelengths between 796nm-800nm as the hypoxic affecting optical band. In some embodiments, when the optical module 120 is a transmissive optical module, the low blood oxygen influence optical band is between 796nm and 800nm, and thus the deviation value caused by the change of blood oxygen of the PPG is minimized when various physiological data are measured by the PPG, so that the transmissive optical module has the highest accuracy in the optical band between 796nm and 800 nm.

In some embodiments, when the optical module 120 is a reflective optical module, the Light-Emitting Diode (LED) Light source commonly used in the market has green LEDs with emission wavelengths of 530nm and 550nm, and most of these Light sources are used in heart rate measurement, which has better anti-interference capability, so they are also suitable for the Light source module 121 used in blood pressure measurement. In other embodiments, when the optical module 120 is a transmissive optical module, an infrared LED between 796nm and 800nm may be used as the light source module 121. In some embodiments, besides the LED, a laser light source may be used as the light source module 121 to obtain a narrower and more precise wavelength range. In some embodiments, the light sensing module 122 may be a Photodiode (PD) and generate an electrical signal by sensing the detected light to generate the desired physiological data. In some embodiments, the light measuring module 122 can also be other photosensitive devices.

When the optical module 120 is used to measure physiological data through PPG features, the optical module 120 is disposed on the object under test. In order to enable the optical module 120 to be stably disposed on the object to be measured for stable measurement, the object to be measured may be pressed by the optical module 120. However, the pressure exerted by these stresses may cause deformation of the PPG signal during physiological data measurement.

Fig. 3A and 3B are schematic diagrams showing PPG signal waveforms of an object to be tested and its surroundings, respectively, under no pressure and with pressure applied, according to one or more techniques of the present disclosure. Referring to fig. 3A, in the case that the object to be measured itself and its surroundings are not pressurized, the PPG waveforms generated by the optical module 120 are stable and have little difference. However, as shown in fig. 3B, in the case that the object to be tested itself and its surroundings are pressurized, the PPG waveforms generated by the optical module 120 continuously change and have a significant difference, even if the PPG waveforms have a tendency to fade. Therefore, when the optical physiological signal measuring device 1 performs physiological data measurement, both transmission measurement and reflection measurement must be considered, and besides the emission wavelength of the emitted light, how to reduce the pressure applied by the optical module 120 to the object to be measured must also be considered. Therefore, the optical module 120 needs to reduce the pressure caused by the constraint force and the clamping force on the object to be measured, thereby maintaining a stable physiological signal and reducing waveform pollution, deformation and distortion caused in the measurement process, so as to ensure that the quality of the physiological signal is sufficiently and correctly used in the measurement of the physiological data.

The optical module 120 may be accommodated in a low pressure device or a non-pressure device. The low pressure device or the no pressure device may include additional device space to accommodate the light source module 121 and the sensor modules such as the light measuring module 122. In some embodiments, the low pressure device or the no pressure device may additionally include a motion detector, a pressure sensor, a high-low pass filter, a normalized waveform filter, and/or a sampling rate modulator. In addition, the low pressure device or the no pressure device may also include a temperature sensor and/or an electrocardiograph (Electrocardiography, ECG) sensor, among other sensing modules.

In some embodiments, the low pressure device or the no pressure device may include, but is not limited to, a clamp type measuring device and a ring type measuring device. In some embodiments, the clamp type measuring device may include, but is not limited to, a fingertip measuring device, an ear measuring device, etc. which measures by clamping. In some embodiments, the ring measuring device may include, but is not limited to, a ring measuring device, a hand ring measuring device, a watch measuring device, a foot ring measuring device, a head ring measuring device, etc. measuring devices by way of surrounding. In some embodiments, the bracelet measuring device is not limited to measuring the palm or back of the hand. In some embodiments, the ring measuring device is not limited to measuring a finger or toe.

In some embodiments, the low pressure device or the no pressure device may be coupled to another measurement device by wire or wirelessly to form a measurement device combination. In some embodiments, the low pressure device or the no pressure device with the optical module 120 may be any one of a clamp type measuring device and a ring type measuring device, and the other measuring device may be any other one of a clamp type measuring device and a ring type measuring device with the optical module 120. For example, the combination of measuring devices may include, but is not limited to, any combination of a fingertip measuring device and a bracelet measuring device, a combination of a finger ring measuring device and a watch measuring device, a combination of a ring measuring device and a watch measuring device, a combination of an ear measuring device and a headband measuring device, or a combination of a bracelet measuring device and a foot ring measuring device.

In some embodiments, two measurement devices in the measurement device combination can measure physiological data by using a PPG measurement method, and the two measurement devices can use the same or different emission wavelengths respectively. In some embodiments, the light emission wavelength used by both measuring devices may be selected from the low blood oxygen variation affecting light band. In some embodiments, when the emission wavelengths of the emitted lights of the two measurement devices are different, the two measurement devices can obtain physiological data by using the PPG measurement method at the same time, and perform blood viscosity analysis by using two different sets of physiological data to obtain the blood viscosity data. In some embodiments, two measurement devices can obtain physiological data by using a PPG measurement method at the same time, and perform a blood flow rate analysis by using two different sets of physiological data to obtain the blood flow rate data.

In some other embodiments, one of the measurement devices in the combination of measurement devices may be the low pressure device or the no pressure device that includes the optical module 120, while the other measurement device may be the low pressure device or the no pressure device that does not include the optical module 120. In still other embodiments, one of the measurement devices in the combination of measurement devices may be the low pressure device or the no pressure device including the optical module 120, while the other measurement device may not be the low pressure device or the no pressure device. However, another measuring device may include a motion detector, a pressure sensor, a high-low pass filter, a normalized waveform filter, and/or a sample rate modulator, and/or a temperature sensor and/or an ECG sensor.

In some embodiments, when the low pressure device or the no pressure device including the optical module 120 is used as the blood pressure measuring device, the low pressure device or the no pressure device can perform the blood pressure value correction in the first measurement. At this time, an additional inflatable device is used to measure the blood pressure of the wearing part in an inflatable manner, and the PPG cut-off signal is used as a signal for measuring the blood pressure. In addition, after the first point blood pressure value is obtained, the inflation device can be deflated to a non-pressurized state, and the low pressure device or the non-pressure device is maintained to be attached to the wearing part, so that the subsequent PPG blood pressure measurement can be performed under the condition that additional inflation and pressurization are not needed.

Fig. 4A shows a perspective view of an optical physiological signal measuring device 1 illustrated in fig. 1 in measuring an object 4 under test, according to one or more techniques of the present disclosure. The optical physiological signal measuring device 1 in fig. 4A includes an operation module 110, a clip-on measuring device 400, and a connection unit 401. The computing module 110 in fig. 4A is a wearable device, and is coupled to the clip-on measuring device 400 through the wired connection unit 401. In some embodiments, the computing module 110 is not limited to a wearable device, but may also be a mobile phone, a tablet computer, a desktop computer, a notebook computer, a server, a network computing system, or other electronic devices. In some embodiments, the operation module 110 may be coupled to the clip-on measuring device 400 in a wireless manner, so that the physical connection unit 401 between the operation module 110 and the clip-on measuring device 400 may not exist. Fig. 4A shows an example of an optical physiological signal measuring device 1. The optical physiological signal measuring device 1 may include more or less elements than the icons, or different configurations of elements having various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

Referring to fig. 1 and 4A, the clip-on measuring apparatus 400 may include an optical module 120. The clamp type measuring device 400 can be used for clamping an object 4 to be measured of a subject, and measuring the physiological data of the object 4 to be measured through the optical module 120 in the clamp type measuring device 400. The object 4 to be measured in fig. 4 may be a finger tip of the subject, so the clip type measuring apparatus 400 may be a fingertip measuring apparatus for clamping the fingertip of the subject, and the fingertip is measured by the optical module 120 in the clip type measuring apparatus 400 to obtain the physiological data of the subject.

In some embodiments, the optical physiological signal measuring device 1 can be used to measure various physiological data. The physiological data may include at least one of a blood pressure data, an oxygen concentration data, a blood flow rate data, a blood viscosity data, and other physiological data. In some embodiments, when the physiological data is the blood pressure data, the optical physiological signal measuring device 1 may be an optical blood pressure measuring device. In some embodiments, the optical physiological signal measuring device 1 can measure various physiological data by a photoplethysmography (Photoplethysmography, PPG) measurement method. Therefore, the optical physiological signal measuring device 1 can also be used as a PPG measuring device.

Fig. 4B shows a perspective view of the clip-on measurement device 400 illustrated in fig. 4A, in accordance with one or more techniques of the present disclosure. The clip type measuring apparatus 400 of fig. 4B may include an outer cap 410, an inner housing 420, an inner cap 430, an outer housing 440, and a coupling portion 450. Fig. 4B shows an example of a clip-on measurement device 400. The clip measuring apparatus 400 may include more or fewer elements than the icons, or a different configuration of elements with various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

The outer cover 410 and the outer housing 440 may be coupled to form a first component assembly. The inner cover 430 and the inner housing 420 may be coupled to form a second component assembly. Referring to fig. 4A and 4B, a receiving space 402 is formed between the inner cover 430 and the inner housing 420 to receive the object 4 to be measured.

The coupling portion 450 is used to connect the outer cap 410 and one side of the outer case 440, so that the outer cap 410 and the outer case 440 can be coupled to each other through the coupling portion 450 and can be slidably coupled through the coupling portion 450. The outer cover 410 and the outer housing 440 can move relatively through the connecting portion 450 to adjust a space size of the accommodating space 402.

The inner housing 420 may further include an inner housing base 421 and resilient tabs 422. The inner case base 421 is coupled with the inner cover 430 to form the receiving space 402. The first element combination of the outer cover 410 and the outer case 440 covers the inner case base 421 and the inner cover 430, but does not cover the elastic tabs 422 protruding outward from both sides of the inner case base 421. When the number of the elastic tabs 422 is 1, the elastic tabs 422 protrude outward from one of both sides of the inner case base 421. When the number of the elastic tabs 422 is 2 or more, each of the elastic tabs 422 is protruded outwardly from the different sides of the inner case base 421. The elastic tab 422 extends along an outer side surface of the outer case 440 after protruding outward from the inner case base 421 to reversely cover the outer case 440. In other words, although the first component assembly formed by the outer cover 410 and the outer housing 440 can cover the inner housing base 421 and the inner cover 430, the inner housing 420 can cover the inner cover 430 and the outer housing 440 in turn through the inner housing base 421 and the elastic tabs 422 protruding outwards.

Fig. 5 shows an exploded view of the clip-on measuring device 400 illustrated in fig. 4B along a combined direction Da, in accordance with one or more techniques of the present disclosure. Referring to fig. 4B and 5, the clip type measuring apparatus 400 may include an outer cover 410, an inner housing 420, an inner cover 430, an outer housing 440, a connecting portion 450, a first magnetic unit 460, a first optical signal module 470 and a second optical signal module 480. Fig. 5 shows an example of a clip-on measurement device 400. The clip measuring apparatus 400 may include more or fewer elements than the icons, or a different configuration of elements with various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

The inner case 420 may further include an inner case base 421, an elastic tab 422, and a second magnetic unit 423. The inner housing 420 has an inner housing inner side surface 4200, and the second magnetic unit 423 is disposed on the inner housing inner side surface 4200 of the inner housing 420. In some embodiments, the second magnetic unit 423 may be disposed in the inner housing inner side surface 4200 belonging to a block of the elastic tab 422. In other words, the elastic tab 422 may have a tab inner side surface (not shown) that is part of the inner shell inner side surface 4200, and the second magnetic unit 423 is disposed on the tab inner side surface. In some embodiments, the elastic tab 422 protrudes outward from one of both sides of the inner case base 421, and the second magnetic unit 423 is disposed on the other side of the elastic tab 422 opposite to the inner case base 421. In other words, one of the two ends of the elastic tab 422 is coupled with the inner case base 421, and the other of the two ends of the elastic tab 422 is provided with the second magnetic unit 423. The second magnetic unit 423 may be a strip-shaped magnetic unit attached or mounted to the inner surface of the wing.

Referring to fig. 4A, fig. 4B, and fig. 5, a receiving space 402 is formed between the inner cover 430 and the inner housing 420 to receive the object 4 to be measured. Furthermore, the outer housing 440 and the inner housing base 421 of the inner housing 420 encapsulate the accommodating space 402 and the inner cover 430 therein. In other words, the accommodating space 402 is included between the outer case 440 and the inner case 420. In addition, the inner housing 420 encloses the accommodating space 402, the inner cover 430 and an outer housing base 441 of the outer housing 440 through the inner housing base 421 and the elastic tab 422. Therefore, the accommodating space 402 may also be located between the inner housing base 421 and the elastic tab 422 of the inner housing 420.

The outer housing 440 has an outer housing outer surface 4400. The first magnetic unit 460 is disposed on the outer case outside surface 4400 of the outer case 440. In some embodiments, the first magnetic unit 460 may be disposed in the housing outer side surface 4400 belonging to a block of the housing base 441. In other words, the housing base 441 may have a base outer surface (not shown) that is a part of the housing outer surface 4400, and the first magnetic unit 460 is disposed on the base outer surface. The first magnetic unit 460 may be a sheet-shaped magnetic unit attached or mounted on the outer surface of the base.

The outer case 440 may further include a first sliding portion 442, and the outer cover 410 may further include a second sliding portion 411. The first sliding portion 442 and the second sliding portion 411 are slidably coupled together by a coupling portion 450. The first sliding portion 442 and the second sliding portion 411 can move relatively along a sliding direction to adjust the distance between the outer housing 440 and the outer cover 410. In some embodiments, the sliding direction is the same as the combined direction Da. When the object 4 to be measured is placed in the accommodating space 402, the effect of adjusting the distance between the outer housing 440 and the outer cover 410 can be achieved by sliding between the first sliding portion 442 and the second sliding portion 411. When the distance between the outer case 440 and the outer cap 410 is greater, the outer cap 410 covers the inner case 420 with a space apart from the outer case 440 and the inner cap 430. In other words, as the distance between the outer casing 440 and the outer casing 410 is larger, the inner casing 420 can be separated from the outer casing 440, so that the space 402 formed between the inner casing 430 and the inner casing 420 can be enlarged. When the distance between the outer case 440 and the outer cover 410 is smaller, the outer case 440 and the outer cover 410 compress the distance between the inner case 420 and the outer case 440, and also compress the distance between the inner cover 430 and the inner case 420. In other words, as the distance between the outer case 440 and the outer case 410 is smaller, the distance between the inner case 420 and the outer case 440 is smaller, and the accommodating space 402 formed between the inner cover 430 and the inner case 420 is also smaller. Accordingly, the space size of the receiving space 402 may also be changed according to the relative movement between the inner case 420 and the outer case 440.

On the other hand, when the object 4 to be measured is placed in the accommodating space 402, the effect of adjusting the distance between the outer housing 440 and the outer cover 410 can be achieved by sliding between the first sliding portion 442 and the second sliding portion 411. As the distance between the outer case 440 and the outer cover 410 is greater, the inner case base 421 and the inner cover 430, which are wrapped between the outer case 440 and the outer cover 410, may have a space apart from each other. In other words, as the distance between the outer case 440 and the outer case 410 is greater, the receiving space 402 formed between the inner case 430 and the inner case 420 may be enlarged. As the distance between the outer case 440 and the outer cover 410 is smaller, the inner case base 421 and the inner cover 430, which are wrapped between the outer case 440 and the outer cover 410, are pressed to be close to each other. In other words, as the distance between the outer case 440 and the outer case 410 is smaller, the receiving space 402 formed between the inner case 430 and the inner case 420 may be reduced. Accordingly, the relative movement of the first sliding portion 442 and the second sliding portion 411 in the sliding direction adjusts not only the distance between the outer case 440 and the outer cover 410, but also the space size of the accommodating space 402.

In some embodiments, only one of the first magnetic unit 460 and the second magnetic unit 423 is a magnetic unit having magnetism, and the other is a non-magnetic but magnetically attractable magnetic unit. For example, the first magnetic unit 460 is a non-magnetic but magnetically attractable magnetic unit, and the second magnetic unit 423 is a magnetic unit. Therefore, a magnetic force between the first magnetic unit 460 and the second magnetic unit 423 is a magnetic attraction force. In some other embodiments, the first magnetic unit 460 and the second magnetic unit 423 are magnetic units. The magnetic poles of the first magnetic unit 460 facing the second magnetic unit 423 are different from the magnetic poles of the second magnetic unit 423 facing the first magnetic unit 460, so the magnetic force between the first magnetic unit 460 and the second magnetic unit 423 is the magnetic attraction force. In still other embodiments, the first magnetic unit 460 and the second magnetic unit 423 are magnetic units having magnetic properties. The magnetic pole of the first magnetic unit 460 facing the second magnetic unit 423 is the same as the magnetic pole of the second magnetic unit 423 facing the first magnetic unit 460, so the magnetic force between the first magnetic unit 460 and the second magnetic unit 423 is a magnetic repulsive force.

To ensure that one of the magnetic attractive force and the magnetic repulsive force can be generated, one of the first magnetic unit 460 and the second magnetic unit 423 needs to be a magnetic unit, and the other may be a magnetic unit having magnetism or a non-magnetic but magnetically attractable magnetic unit. The magnetic unit having magnetism may include, but is not limited to, a magnetic substance having magnetism such as a permanent magnet or an electromagnet. The non-magnetic but magnetically attractable magnetic elements may include, but are not limited to, ferromagnetic metals such as iron, cobalt, nickel, and alloys thereof, and mixtures of the foregoing metals or alloys with other materials.

In some embodiments, when the magnetic force between the first magnetic unit 460 and the second magnetic unit 423 is the magnetic attractive force, the magnetic attractive force between the first magnetic unit 460 and the second magnetic unit 423 can attract the elastic tab 422 to press back to the outer casing 440, thereby driving the outer casing 440 to approach the outer cover 410, so that the space size of the accommodating space 402 is adapted to an object size of the object 4 to be measured. In these embodiments, the initial position of the resilient tab 422 is farther away, or even directly away from the outer housing 440. When the outer casing 440 is pushed away to approach the elastic tab 422, the elastic tab 422 is attracted by the magnetic attraction force to deviate from the initial position, and an elastic force is generated to make the elastic tab 422 reversely move away from the outer casing 440, so as to release the accommodating space 402. Therefore, by the interaction between the magnetic attractive force and the elastic force, a pressure applied by the inner cover 430 to the object 4 to be measured can be reduced. Therefore, the clip-on measuring device 400 can reduce the pressure caused by the constraint force and the clamping force of the optical module 120 on the object 4 to be measured, so as to maintain a stable physiological signal, and reduce waveform pollution, deformation and distortion caused in the measuring process, so as to ensure that the quality of the physiological signal can be correctly used in the measurement of the physiological data.

The magnetic force between the first magnetic unit 460 and the second magnetic unit 423 may be the magnetic attraction force that urges the elastic tab 422 toward the housing base 441. Therefore, when the object 4 to be measured is placed in the accommodating space 402, although the object 4 to be measured can prop open the accommodating space 402 according to the object size and push the housing base 441 to the elastic tab 422 in order to increase the magnetic attraction force exerted on the elastic tab 422, the elastic tab 422 attracted by the magnetic attraction force deviates from the initial position to induce the elastic tab 422 to pull back the elastic tab 422 reversely, so as to avoid that the magnetic attraction force excessively drives the elastic tab 422 to push the housing 440 back toward the outer cover 410, resulting in the magnetic attraction force inducing the compression of the inner cover 430 and generating unnecessary pressure on the object 4 to be measured. Therefore, the elastic force can reduce or avoid the pressure applied to the object 4 to be measured caused by the magnetic attraction force.

The elastic force can control the elastic wing 422 to tend towards the magnetic attraction force exerted by the housing base 441, so as to avoid the magnetic attraction force from excessively attracting the elastic wing 422 to press inwards, thereby reducing the pressure exerted by the magnetic attraction force to induce inwards pressing to the object 4 to be tested. For example, when the object 4 to be measured is placed in the accommodating space 402, the object 4 to be measured expands the accommodating space 402 according to the size of the object. Therefore, both the inner cover 430 and the outer housing 440 move away from the outer cover 410, and the first magnetic unit 460 moves away from the outer cover 410 along with the outer housing 440. Although the magnetic attraction force attracts the elastic tab 422 to approach when the accommodating space 402 is opened, the elastic force of the elastic tab 422 can counteract part of the magnetic attraction force, so as to avoid that the magnetic attraction force excessively drives the elastic tab 422 to approach the outer cover 410, and the elastic tab 422 presses the inner cover 430, so that unnecessary pressure is generated on the object 4 to be measured. Therefore, the elastic force of the elastic tab 422 can reduce or avoid the pressure applied to the object 4 caused by the magnetic attraction force.

The magnetic attraction force may vary with the distance between the first magnetic unit 460 and the second magnetic unit 423. The closer the first magnetic unit 460 is to the second magnetic unit 423, the greater the magnetic attraction will be. The further the first magnetic unit 460 is from the second magnetic unit 423, the smaller the magnetic attraction force will be. Likewise, the elastic force may also vary with the distance between the outer case 440 and the outer cap 410. Since the initial position of the elastic tab 422 is farther from the outer case 440, the elastic force is greater as the distance between the outer case 440 and the outer cap 410 is closer, the elastic tab 422 is attracted to be deviated from the initial position by a greater distance. The further the distance between the outer case 440 and the outer cap 410, the smaller the distance the elastic tab 422 is deviated from the initial position, the smaller the elastic force will be.

Before the object 4 to be measured is placed in the accommodating space 402 (i.e. the magnetic attraction force and the elastic force are in equilibrium state for a long time), the magnetic attraction force and the elastic force may be equal or have only a slight gap due to other forces. When the object 4 to be measured is gradually placed in the accommodating space 402, the distance between the outer casing 440 and the elastic tab 422 becomes smaller due to the larger distance between the outer casing 440 and the inner casing base 421, and the magnetic attraction force increases, so that the elastic tab 422 is close to the outer casing 440, and the pressure is induced to the object 4 to be measured. At this time, the elastic force is also increased by the elastic tab 422 being attracted to resist the magnetic attraction force, thereby buffering the influence of the magnetic attraction force. In other words, after the object 4 to be measured is placed in the accommodating space 402, the magnetic attraction force and the elastic force with different magnitudes can be generated by the distance between the first magnetic unit 460 and the second magnetic unit 423, so as to adjust the pressure that may be applied to the object 4 to be measured by the elastic force and the magnetic attraction force in a magnetic levitation-like manner. Therefore, the clip-on measuring device 400 can be a magnetic levitation measuring device and is coupled with the computing unit 112, so that the computing unit 112 calculates various physiological data such as blood pressure data according to the measuring signal obtained by the magnetic levitation device.

In some other embodiments, when the magnetic force between the first magnetic unit 460 and the second magnetic unit 423 is the magnetic repulsive force, the magnetic repulsive force between the first magnetic unit 460 and the second magnetic unit 423 drives the outer housing 440 to push the elastic tab 422 away, thereby releasing the accommodating space 402. In these other embodiments, the initial state of the elastic tab 422 is closer to the outer housing 440. When the outer case 440 pushes the elastic tab 422 away by the magnetic repulsive force, the elastic force generated by the elastic tab 422 may be pressed back to the outer case 440. Therefore, the magnetic repulsive force also indirectly drives the outer housing 440 to approach the outer cover 410, so that the space size of the accommodating space 402 is adapted to an object size of the object 4 to be measured. Therefore, the interaction between the magnetic repulsive force and the elastic force can reduce a pressure applied by the inner cover 430 to the object 4 to be measured. Therefore, the clip-on measuring device 400 can reduce the pressure caused by the constraint force and the clamping force of the optical module 120 on the object 4 to be measured, so as to maintain a stable physiological signal, and reduce waveform pollution, deformation and distortion caused in the measuring process, so as to ensure that the quality of the physiological signal can be correctly used in the measurement of the physiological data.

The spring force may be a slight spring force urging the spring tab 422 toward the housing base 441. Therefore, when the object 4 to be measured is placed in the accommodating space 402, although the object 4 to be measured expands the accommodating space 402 according to the size of the object, the elastic tab 422 is pushed outwards, the elastic tab 422 pushed outwards induces the elastic force to press back the outer housing 440, so as to avoid the excessive expansion of the accommodating space 402 between the outer housing 440 and the inner housing 420. Therefore, the elastic force of the elastic tab 422 drives the outer housing 440 toward the outer cover 410, so that the space size of the accommodating space 402 can be adapted to the object size of the object 4 to be measured.

The magnetic repulsive force can control the elastic force applied by the elastic wing 422 to the housing base 441, so as to avoid excessive inward pressing of the elastic force, and reduce the pressure applied by the elastic force to the object 4 to be measured. For example, when the object 4 to be measured is placed in the accommodating space 402, the object 4 to be measured expands the accommodating space 402 according to the size of the object. Therefore, both the inner cover 430 and the outer housing 440 move away from the outer cover 410, and the first magnetic unit 460 moves away from the outer cover 410 along with the outer housing 440. Although the elastic force of the elastic tab 422 slightly presses back to the outer casing 440 when the accommodating space 402 is opened, the magnetic repulsive force between the first magnetic unit 460 and the second magnetic unit 423 counteracts part of the elastic force, so as to avoid that the elastic force of the elastic tab 422 excessively drives the outer casing 440 to approach the outer casing 410, and the elastic force excessively presses the inner cover 430, and thus unnecessary pressure is generated on the object 4 to be tested. Therefore, the magnetic repulsive force can reduce the pressure exerted by the elastic force on the object 4 to be measured.

The magnetic repulsive force may vary with the distance between the first magnetic unit 460 and the second magnetic unit 423. The magnetic repulsive force is greater as the first magnetic unit 460 and the second magnetic unit 423 are closer together. The magnetic repulsive force is smaller as the first magnetic unit 460 and the second magnetic unit 423 are farther. Likewise, the elastic force may also vary with the distance between the outer case 440 and the outer cap 410. Since the elastic tab 422 is initially closer to the outer case 440, the elastic force is smaller as the distance between the outer case 440 and the outer cap 410 is closer, the elastic tab 422 is less than the distance from the inner case base 421 without being pushed outward. The greater the distance between the outer case 440 and the outer cap 410, the greater the distance the elastic tab 422 is pushed outward by the outer case 440 away from the inner case base 421, and the greater the elastic force.

Before the object 4 to be measured is placed in the accommodating space 402 (i.e. the magnetic repulsive force and the elastic force are in a balanced state for a long time), the magnetic repulsive force and the elastic force may be equal or have only a slight gap due to other forces. When the object 4 to be measured is gradually placed in the accommodating space 402, the elastic force increases due to the greater distance of the elastic tab 422 from the inner case base 421, so that the inner cover 430 generates the pressure on the object 4 to be measured. At this time, the magnetic repulsive force is also increased by the movement of the outer housing 440 to resist the elastic force, thereby reducing the pressure. In other words, after the object 4 to be measured is placed in the accommodating space 402, the magnetic repulsive force and the elastic force with different magnitudes can be generated by the distance between the first magnetic unit 460 and the second magnetic unit 423, so as to adjust the pressure that may be applied to the object 4 to be measured by the magnetic repulsive force and the elastic force in a magnetic levitation-like manner. Therefore, the clip-on measuring device 400 can be a magnetic levitation measuring device and is coupled with the computing unit 112, so that the computing unit 112 calculates various physiological data such as blood pressure data according to the measuring signal obtained by the magnetic levitation device.

In some embodiments, the clip-on measuring apparatus 400 can measure various physiological data of the object 4 by using a PPG measurement method. Thus, the clip-on measurement device 400 can be used as a PPG measurement device. The outer housing 440 may further include a first optical signal module receiving portion 4410 disposed on the housing base 441. The first optical signal module receiving portion 4410 is configured to receive the first optical signal module 470, so that the first optical signal module 470 is coupled to the outer housing 440 for measuring the object 4. The inner housing base 421 may further include a second optical signal module housing portion 4210, where the second optical signal module housing portion 4210 may be used to house a second optical signal module 480 for measuring the object 4 to be measured.

Referring to fig. 1, 4A and 5, one of the first optical signal module 470 and the second optical signal module 480 can be used as the light source module 121 in the optical module 120, and thus can be used to emit an emitted light. The emitted light has a light-emitting wavelength, and the light-emitting wavelength is selected according to the influence amount of the blood oxygen concentration on the light absorption coefficient. The emission wavelength is selected from a low blood oxygen influence optical band in which the light absorption coefficient is hardly influenced by the blood oxygen concentration. The other of the first optical signal module 470 and the second optical signal module 480 can be used as the light measuring module 122 in the optical module 120, and thus can be used to receive a detection light after measuring the object 4 to be measured by the emitted light. Referring to fig. 4B again, since the first optical signal module 470 and the second optical signal module 480 are respectively located above and below the accommodating space 402, the optical module 120 formed by the first optical signal module 470 and the second optical signal module 480 may be a transmission optical module. The emitted light can be emitted by one of the first optical signal module 470 and the second optical signal module 480, and after penetrating through the object 4 to be measured located in the accommodating space 402, the emitted light is received by the other one of the first optical signal module 470 and the second optical signal module 480, so as to complete the measurement of the optical module 120. In some embodiments, the first optical signal module 470 may be the light source module 121 and the second optical signal module 480 may be the light metering module 122. In other embodiments, the first optical signal module 470 may be the optical metrology module 122 and the second optical signal module 480 may be the light source module 121.

In some other embodiments, one of the first and second optical signal modules 470, 480 may include both the light source module 121 and the light metering module 122 in the optical module 120. In other words, the clip measuring apparatus 400 may not include the other of the first optical signal module 470 and the second optical signal module 480. In some embodiments, the clip-on measuring apparatus 400 may include only the first optical signal module 470 as the light source module 121 and the light measuring module 122, while the clip-on measuring apparatus 400 may not include the second optical signal module 480. In other embodiments, the clip-on measuring apparatus 400 may include only the second optical signal module 480 as the light source module 121 and the light measuring module 122, and the clip-on measuring apparatus 400 may not include the first optical signal module 470. Since the clip type measuring apparatus 400 may only include one of the first optical signal module 470 and the second optical signal module 480, when the emitted light is emitted from the optical signal module, the emitted light is reflected by the object 4 to be measured in the accommodating space 402 and then returns to the optical signal module to be received, so as to complete the measurement of the optical module 120. Therefore, by using only one optical signal module in the clip-on measuring apparatus 400, the optical signal module can be used as a reflective optical module to serve as both the light source module 121 and the light measuring module 122.

In some embodiments, when the clip measuring apparatus 400 has the first optical signal module 470, the inner cover 430 may include an inner cover middle hole 431. When the first optical signal module 470 serves as the light source module 121, the emitted light may pass through the inner cover middle hole 431 to be irradiated to the object 4 to be measured. When the first optical signal module 470 is used as the optical measurement module 122, the detection light can pass through the inner cover hole 431 to be received by the first optical signal module 470. In some embodiments, when the clip measuring apparatus 400 has the second optical signal module 480, the center of the second optical signal module housing 4210 may include an inner housing center hole (not shown). When the second optical signal module 480 serves as the light source module 121, the emitted light may pass through the hole in the inner case to be irradiated to the object 4 to be measured. When the second optical signal module 480 is used as the optical measurement module 122, the detection light can pass through the hole in the inner housing to be received by the second optical signal module 480.

Fig. 6A-6C illustrate perspective views of the outer cover 410, the outer housing 440, and the coupling 450 illustrated in fig. 5, respectively, in accordance with one or more techniques of the present disclosure. Fig. 6A to 6C show one example of the outer cover 410, the outer case 440, and the coupling part 450, respectively. The outer cover 410, the outer housing 440, and the coupling 450 may each include more or less elements than shown, or different configurations of elements having various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

The first sliding portion 442 of the outer case 440 may further include a first sliding shaft 4421 and a first sliding rail 4422, the second sliding portion 411 of the outer cover 410 may further include a coupling hole 4111, a second sliding rail 4112, and a plurality of first fixing portions 4113, and the coupling portion 450 may further include a coupling shaft 451 and a plurality of second fixing portions 452. The plurality of first fixing portions 4113 are respectively coupled with a corresponding one of the plurality of second fixing portions 452 to fix the coupling portion 450 with the outer cover 410, so that no relative movement is performed between the coupling portion 450 and the outer cover 410.

The first sliding shaft 4421 of the outer housing 440 is slidably coupled with the second sliding rail 4112 of the outer cap 410 such that the first sliding shaft 4421 is slidable in the first sliding direction in the second sliding rail 4112. The connection shaft 451 is slidably coupled to the first sliding rail 4422 of the outer case 440 in addition to the connection hole 4111 penetrating the outer cap 410, such that the connection shaft 451 is slidable in the second sliding direction in the first sliding rail 4422. In some embodiments, the first sliding direction of the first sliding shaft 4421 in the second sliding rail 4112 is opposite to the second sliding direction of the connecting shaft 451 in the first sliding rail 4422. Referring to fig. 5 and fig. 6A-6C, the first sliding direction and the second sliding direction may be parallel to the combined direction Da.

By sliding between the first sliding portion 442 and the second sliding portion 411, the clip type measuring apparatus 400 can adapt to the object size of the object 4 to be measured. When the object 4 to be measured is a finger tip, the object size may be a finger thickness (e.g., finger tip width and/or thickness).

Fig. 7A shows an upper perspective view of the clip-on measurement device 400 illustrated in fig. 4B, in accordance with one or more techniques of the present disclosure. Fig. 7B shows a cross-sectional view of a clip-on measurement device 400 taken along line C1-C1 of fig. 7A, in accordance with one or more techniques of the present disclosure. Fig. 7C shows an enlarged view of the area E1 illustrated in fig. 7B, in accordance with one or more techniques of the present disclosure.

Referring to fig. 4A, fig. 7A and fig. 7B, the external structure of the clip-on measuring apparatus 400 mainly comprises the first component assembly coupled with the outer cover 410 and the outer housing 440. The internal structure of the clip measuring apparatus 400 may be mainly composed of the second component assembly in which the inner cover 430 is coupled to the inner housing 420. The inner housing base 421 of the inner housing 420 may be coupled with the inner cover 430 to form the accommodating space 402 therebetween. The elastic tab 422 of the inner housing 420 may protrude from the first component assembly and in turn encase the outer housing 440. The first optical signal module 470 may be located between the inner cover 430 and the outer case 440, and the second optical signal module 480 may be located between the outer cover 410 and the inner case 420, so that the first optical signal module 470 and the second optical signal module 480 may be located at opposite sides of the receiving space 402.

The second element combination formed by the inner cover 430 and the inner housing 420 may have an opening 4021 and a joint 4022. The opening 4021 may be an accommodating opening of the accommodating space 402, so that the object 4 to be measured is placed in the accommodating space 402 from the opening 4021. The joint 4022 may be a receiving closed port of the receiving space 402. When the object 4 to be measured is placed in the accommodating space 402 from the opening 4021, the object 4 to be measured can only go deep into the joint 4022, and cannot go further inward.

The inner housing 420 has an inner housing inner side surface 4200. Referring to fig. 7A and 7C in combination, the inner housing inner surface 4200 is shown as a first medial diagonal line 4024 in fig. 7C along a front-to-back direction Df, taken through line C1-C1 at the location of the inner housing base 421 of the inner housing 420. In addition, the inner cover 430 and the inner housing 420 have an engagement plane 4023 at the engagement portion 4022. The first middle oblique line 4024 has a first oblique angle θ with a normal line of the joint plane 4023. In other words, the inner housing inner side surface 4200 has the first inclination angle θ in the front-rear direction Df along the opening portion 4021 to the joint 4022. In some embodiments, the first tilt angle θ may have a tilt angle of 3 ° -7 °. In some embodiments, the first tilt angle θ may be 5 °. Due to the presence of the first inclination angle θ, the opening cross-sectional area A1 of the accommodating space 402 at the opening portion 4021 is larger than the joint cross-sectional area A2 of the joint portion 4022. Thus, the presence of the first inclination angle θ can enhance the degree of adhesion between the inner shell inner side surface 4200 of the inner shell base 421 and the object 4 to be measured.

In some embodiments, inner cover inside surface 4300, after intercepting clip measuring apparatus 400 via lines C1-C1, is shown in FIG. 7C as a second middle diagonal line 4025 in the front-to-back direction Df. The second middle diagonal line 4025 may also have a second tilt angle with the normal to the joint plane 4023. In other words, the inner cover inner side surface 4300 may also have the second inclination angle in the front-rear direction Df along the opening 4021 to the joint 4022. In some embodiments, the second tilt angle may have a tilt angle of 3 ° -7 °. In some embodiments, the second tilt angle may be 5 °. Due to the presence of the second inclination angle, the opening cross-sectional area A1 of the accommodating space 402 at the opening portion 4021 is larger than the joint cross-sectional area A2 of the joint portion 4022. Accordingly, the degree of adhesion between the inner lid inner side surface 4300 of the inner lid 430 and the object 4 to be measured can be enhanced due to the presence of the second inclination angle.

The inner shell inner surface 4200 includes an inner shell friction portion at the location of the inner shell base 421 of the inner shell 420. The inner shell inner side surface 4200 may be divided into an inner shell inner side surface 4200 of the inner shell base 421 and an inner shell inner side surface 4200 of the elastic vane 422. The inner surface 4200 of the inner housing base 421 is a surface forming the accommodating space 402. In other words, the inner shell friction portion may be located in the inner shell inner side surface 4200 adjacent to the receiving space 402. In some embodiments, only a portion of the inner shell inner side surface 4200 of the inner shell base 421 is the inner shell friction portion. Therefore, the friction coefficient of the inner shell friction portion may be higher than that of other portions in the inner shell inner side surface 4200 of the inner shell base 421. In other embodiments, the inner shell inner side surface 4200 of the entire inner shell base 421 is the inner shell friction portion. Accordingly, the inner shell inner side surface 4200 of the entire inner shell base 421 has a high friction coefficient. In some embodiments, when only a portion of the inner shell inner surface 4200 of the inner shell base 421 is the inner shell friction portion, a high friction coefficient material may be attached to the inner shell inner surface 4200 of the inner shell base 421 to generate a difference in friction coefficient. In other embodiments, when the inner shell inner surface 4200 of the inner shell 421 is the inner shell friction portion, the inner shell 421 can be made of a material with a high friction coefficient, or the material with a high friction coefficient can be adhered to the inner shell inner surface 4200 of the inner shell 421 to generate the difference of friction coefficients.

The inner cap inner surface 4300 includes an inner cap friction portion. The inner cover inner side surface 4300 is a surface forming the accommodation space 402. In other words, the inner cap friction part may be located adjacent to the inner cap inner side surface 4300 of the receiving space 402. In some embodiments, only a portion of the inner cap inner surface 4300 of the inner cap 430 is the inner cap friction portion. Therefore, the friction coefficient of the inner cap friction portion may be higher than that of other portions in the inner cap inner side surface 4300. In other embodiments, the entire inner cap inner side surface 4300 is the inner cap friction portion. Accordingly, the entire inner cap inner side surface 4300 has a high friction coefficient. In some embodiments, when only a portion of the inner cover inside surface 4300 is the inner cover friction portion, a difference in friction coefficient may be generated by attaching a high friction coefficient material to the inner cover inside surface 4300. In other embodiments, when the entire inner surface 4300 is the inner friction portion, the inner cover 430 may be made of a material with a high friction coefficient directly or the material with a high friction coefficient may be attached to the entire inner surface 4300 to generate the difference in friction coefficients.

The clamp type measuring device 400 needs to reduce the pressure caused by the constraint force and the clamping force of the object 4 to be measured so as to maintain a stable physiological signal. However, when the pressure is reduced due to the restraining force and the clamping force, the clip type measuring apparatus 400 may be detached at any time due to the movement of the object 4 to be measured. Accordingly, at least one of the inner cap friction part and the inner housing friction part may be included in the clip type measuring apparatus 400. By the material with higher friction coefficient, a larger friction force can be generated between the inner shell inner side surface 4200 and/or the inner cover inner side surface 4300 of the inner shell base 421 and the object 4 to be tested, so as to assist the object 4 to be tested to be stably remained in the accommodating space 402, thereby achieving the anti-skid effect. Therefore, even if the pressure is reduced due to the restraining force and the clamping force by the assistance of the magnetic force, the inner cover friction portion and the inner housing friction portion can prevent the clip type measuring apparatus 400 from falling off due to the movement of the object 4 to be measured.

Fig. 7D shows a cross-sectional view of the clip-on measuring device 400 illustrated in fig. 7B after the inner cover 430 and the inner housing 420 are relatively moved in the combined direction Da, in accordance with one or more techniques of the present disclosure.

Referring to fig. 4A, fig. 7C and fig. 7D, when the object 4 to be measured extends into the accommodating space 402, the stress directions of the inner housing inner surface 4200 and the inner housing inner surface 4300 are relatively uniform due to the first inclination angle θ, so that the object size of the object 4 to be measured is relatively moved in the combining direction Da by using the first sliding portion 442 and the second sliding portion 411 as the expanding manner of the space size of the accommodating space 402 when the object size of the object 4 to be measured is driven to expand. Referring to fig. 6A-6C, the first sliding shaft 4421 can move downward in the second sliding rail 4112 along the combining direction Da relative to the cover 410. In other words, the first sliding shaft 4421 is slidable in the first sliding direction in the second sliding rail 4112. In addition, the coupling shaft 451 can move upward in the first sliding rail 4422 along the combining direction Da with the coupling hole 4111 with respect to the outer housing 440. In other words, the coupling shaft 451 along with the coupling hole 4111 can slide in the second sliding direction in the first sliding rail 4422.

Since this expansion of the space size is mainly caused by the relative movement of the outer cover 410 and the outer case 440 in the combining direction Da, the opening cross-sectional area A1 of the accommodating space 402 in the opening 4021 and the joint cross-sectional area A2 of the joint 4022 also change according to the relative movement amount between the outer cover 410 and the outer case 440. In some embodiments, due to the first inclination angle θ, the opening cross-sectional area A1 of the opening 4021 remains larger than the engagement cross-sectional area A2 of the engagement portion 4022 even if the relative movement between the outer cover 410 and the outer case 440 occurs. In some embodiments, the first inclination angle θ does not necessarily fit the contours of all objects 4 to be measured. Therefore, the expansion of the space is not necessarily completed by the relative movement amount of the outer cover 410 and the outer case 440 in the combining direction Da. In other words, when the object 4 to be measured is placed in the clip type measuring apparatus 400, there is a possibility that the outer cover 410 and the outer case 440 slightly rotate, so that the aperture of the opening 4021 is enlarged more than that of the joint 4022. In some embodiments, since the first sliding shaft 4421 and the connecting shaft 451 may be included between the first sliding portion 442 and the second sliding portion 411, the chance of rotation between the outer cover 410 and the outer housing 440 may be reduced, so as to avoid the excessive expansion of the caliber of the opening 4021, resulting in a decrease in the contact area between the inner housing inner surface 4200 of the inner housing base 421 and the inner housing inner surface 4300 and the object 4 to be tested, and thus, insufficient friction force may be easily loosened.

Fig. 8A shows a cross-sectional view of a clip-on measurement device 400 taken along line C2-C2 of fig. 7A, in accordance with one or more techniques of the present disclosure. Fig. 8B shows a schematic view of the clip-on measuring device 400 illustrated in fig. 8A as the receiving space 402 expands, in accordance with one or more techniques of the present disclosure.

Referring to fig. 4A, 8A and 8B, fig. 8A shows that when the object 4 to be measured is not yet placed in the clip measuring apparatus 400, the accommodating space 402 formed by the inner surface 4200 of the inner housing base 422 and the inner surface 4300 of the inner cover 430 is in an initial state, and the elastic tab 422 is located in an initial position. Fig. 8B shows that after the object 4 to be measured is placed in the clip measuring apparatus 400, the accommodating space 402 formed by the inner housing inner surface 4200 of the inner housing base 422 and the inner housing inner surface 4300 of the inner housing 430 is expanded, and the elastic tab 422 is located at an elastic force applying position. The elastic force application position varies with the object size of the object 4 to be measured.

Although the outer cover 410 and the outer housing 440 move relatively along the assembling direction Da and the inner housing 420 and the inner cover 430 also move relatively along the assembling direction Da when the accommodating space 402 is enlarged, for convenience of the following description, only the fixing position of the outer cover 410 and the inner housing base 421 of the inner housing 420 is taken, and the downward movement of the inner cover 430 and the outer housing 440 along the assembling direction Da is taken as an example.

In some embodiments, the magnetic force between the first magnetic unit 460 and the second magnetic unit 423 is the magnetic attraction force. In an embodiment, when the initial position of the elastic tab 422 still causes the first magnetic unit 460 to be affected by the magnetic attraction force of the second magnetic unit 423, the initial position of the elastic tab 422 is slightly deviated from a first zero-elastic position. At this time, the magnetic attraction force generates a moment on the inner shell interface 424 between the elastic tab 422 and the inner shell base 421In addition, since the elastic tab 422 located at the initial position is in a first equilibrium state, the elastic tab 422 is slightly deviated from the moment of the elastic force caused by the first zero-elastic position due to the influence of the magnetic attraction forceWill also be equal toIn an embodiment, when the initial position of the elastic tab 422 is far enough away from the first magnetic unit 460 that the second magnetic unit 423 is not affected by the magnetic attraction force, the initial position of the elastic tab 422 is the first zero-elastic position. At this time, the moment of the magnetic attraction force and the elastic force are both 0. The first zero elastic force position refers to a position where the elastic tab 422 is in a stress-free state without being affected by the magnetic attraction force.

When the elastic tab 422 is located at the elastic force applying position, the inner cover 430 is moved downward due to the effect of the object 4 to be measured entering the clip type measuring device 400, so that the outer housing 440 approaches the elastic tab 422, the magnetic attraction between the first magnetic unit 460 and the second magnetic unit 423 is increased, and the moment of the magnetic attraction generated by the elastic tab 422 relative to the inner housing interface 424 is increasedHowever, since the elastic tab 422 at the elastic force applying position is still in a second equilibrium state eventually, the elastic force is also raised to be greater than the first zero-elastic force position due to the elastic tab 422 being further deviated from the first zero-elastic force positionTo be in contact with the moment of magnetic attractionBalance.

In some other embodiments, the magnetic force between the first magnetic unit 460 and the second magnetic unit 423 is the magnetic repulsive force. When the elastic tab 422 is located at the initial position, the first magnetic unit 460 located at the end of the elastic tab 422 still maintains the magnetic repulsive force with the second magnetic unit 423, so that the elastic tab 422 is slightly deviated from a second zero-elastic position due to the influence of the magnetic repulsive force. The second zero elastic force position refers to a position where the elastic tab 422 is in a stress-free state without being affected by the magnetic repulsive force. At this time, the magnetic repulsive force generates a moment on the inner shell interface 424 between the elastic tab 422 and the inner shell base 421In addition, since the elastic tab 422 at the initial position is in a first equilibrium state, the elastic tab 422 is slightly deviated from the zero-elastic position due to the magnetic repulsive forceWill also be equal to

In some embodiments, when the elastic tab 422 is located at the elastic force applying position, the inner cover 430 moves downward due to the influence of the object 4 to be measured entering the clip type measuring device 400, so that the outer housing 440 pushes the elastic tab 422 together, the elastic force of the elastic tab 422 pressed against the outer housing 440 increases, and the moment generated by the elastic tab 422 relative to the inner housing interface 424 increases toHowever, since the elastic tab 422 at the elastic force applying position is still in a second equilibrium state, the magnetic repulsive force is also raisedTo be in contact with the moment of the elastic forceBalance.

In some embodiments, since the second magnetic unit 423 is disposed at the tail end of the elastic tab 422, the distance between the second magnetic unit 423 and the interface 424 between the inner shell can be maximized, so that the torque effect of the magnetic force can be maximized, so that the restraining force and the clamping force of the object 4 to be tested caused between the magnetic force and the elastic force can be mutually adjusted. In some embodiments, since the first magnetic unit 460 may be a sheet magnetic material, when the elastic tab 422 drives the second magnetic unit 423 to deviate from the initial position, the first magnetic unit 460 may still face the second magnetic unit 423, so as to maintain the magnetic force.

In some embodiments, there is a first cavity 403 between the outer cap 410 and the inner housing base 421 of the inner housing 420. The first cavity 403 may be filled with an elastic material, so as to improve the buffering force between the inner shell base 421 and the object 4 to be tested, and help the inner shell base 421 to flexibly cover the object 4 to be tested and maintain the state of being stuck, thereby reducing the constraint force of the object 4 to be tested. In some embodiments, there is a second cavity 404 between the outer housing 440 and the inner cover 430. The second cavity 404 may be filled with an elastic material to increase the buffering force between the inner cover 430 and the object 4 to be tested, so that the inner cover 430 can flexibly cover the object 4 to be tested and maintain the state of being pressed, thereby reducing the restraining force of the object 4 to be tested. In some embodiments, the first cavity 403 and the second cavity 404 may be filled with an elastic material. In some embodiments, the first cavity 403 and the second cavity 404 may be filled with the same material. In some embodiments, the first cavity 403 and the second cavity 404 may be filled with different materials according to respective requirements of different contact surfaces with the object 4 to be measured. In some embodiments, the filled material may be a silica gel, a memory sponge, a gel, a rubber, or the like.

Fig. 9 shows a perspective view of another clip-on measurement device 500, in accordance with one or more techniques of the present disclosure. Referring to fig. 1, 4A, 4B and 9, the clip-on measuring apparatus 500 in fig. 9 is similar to the clip-on measuring apparatus 400 in fig. 4B, and may also include an outer cover 510, an inner housing 520, an inner cover 530, an outer housing 540, a connecting portion 550 and a first magnetic unit 560. In addition, the clamp measuring device 500 also has a receiving space 502 for receiving the object 4 to be measured.

Although fig. 9 does not show the first optical signal module and the second optical signal module, the clip type measuring apparatus 500 is the same as the clip type measuring apparatus 400, and includes at least one of the first optical signal module and the second optical signal module. When the clip-on measuring apparatus 500 includes only one optical signal module, the optical signal module can be used as a reflective optical module to serve as the light source module 121 and the light measuring module 122 at the same time. Fig. 9 shows an example of a clip-on measuring device 500. The clip measuring apparatus 500 may include more or fewer elements than the icons, or a different configuration of elements with various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

The main difference between the clip-on measuring apparatus 500 of fig. 9 and the clip-on measuring apparatus 400 of fig. 4B is that the outer shape of the inner housing 520 is different from that of the inner housing 420. The inner housing 420 has an inner housing base 421 and resilient tabs 422, while the inner housing 520 also has an inner housing base 521 and resilient tabs 522. Although the inner housing base 521 is identical to the inner housing base 421, the elastic tab 522 has a different shape from the elastic tab 422. When the elastic tab 422 is in this initial position, the elastic tab 422 as a whole extends along the outer housing surface 4400 of the outer housing 440. In other words, the elastic tab 422 as a whole extends along the first magnetic unit 460 resting against the outer surface 4400 of the housing. In contrast, when the elastic tab 522 is located at the initial position, the elastic tab 522 is expanded to the outside, and only the end section of the elastic tab 522 provided with the second magnetic unit 523 is close to the outer surface of the outer case 540. In other words, the elastic tab 522 does not extend along the first magnetic unit 560 that is pressed against the outer surface of the housing, but rather there is an elastic space 505 between the elastic tab and the outer surface of the housing.

Referring to fig. 8C, when the object 4 to be measured is placed in the clip-type measuring apparatus 400, since the elastic tab 422 extends along the first magnetic unit 460 that is pressed against the outer surface 4400 of the housing, the elastic tab 422 can only be pushed by the outer housing 440 on the left and right sides, and the stress of the elastic tab 422 is concentrated at the inner housing interface 424, which is more susceptible to damage due to stress concentration. When the object 4 to be measured is put into the clip-type measuring device 500, since the elastic space 505 exists between the elastic tab 522 and the outer surface of the housing, the elastic tab 522 is pushed downward by the outer housing 540, and the stress of the elastic tab 522 is dispersed at the bending position of the elastic tab 522 except at the inner housing boundary 524, so that the elastic tab 522 is less likely to be damaged due to stress concentration.

FIG. 10A illustrates a perspective view of a ring-type metrology device 600 in accordance with one or more techniques of the present disclosure. FIG. 10B illustrates a schematic diagram of the ring-type measuring device 600 illustrated in FIG. 10A in measuring an object 6 under test, in accordance with one or more techniques of the present disclosure. The ring-type measuring device 600 may include a ring element 610 and an optical signal module 620. Fig. 10A shows an example of a ring-type metrology apparatus 600. The ring-type measuring device 600 may include more or fewer elements than the icons, or a different configuration of elements with various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

Referring to fig. 1, 10A and 10B, the ring-type measuring device 600 may be coupled to the computing module 110 by a wired or wireless method. For example, it may be coupled to the operation unit 110 through the connection unit 401 as shown in fig. 4A, or directly coupled to the operation unit 110 through a wireless module. The optical signal module 620 can be used as the optical module 120 and as an optical device for emitting an emitted light with a wavelength of a light, receiving a detection light after the emitted light is measured, and transmitting the measurement result to the operation module 110.

The ring-type measuring device 600 can be used for surrounding the object 6 to be measured of a subject, and the physiological data of the object 6 to be measured can be measured by the optical signal module 620 of the ring-type measuring device 600. The object 6 to be measured in fig. 10B may be a finger knuckle or a finger knuckle of the subject, so the ring-type measuring device 600 may be a ring-type measuring device for encircling the finger knuckle or the finger knuckle of the subject, and the optical signal module 620 in the ring-type measuring device 600 measures the finger knuckle or the finger knuckle to obtain the physiological data of the subject. In some other embodiments, the ring-shaped measuring device 600 may be a hand ring measuring device, a watch measuring device, a foot ring measuring device, a head ring measuring device, etc., which can measure by encircling the limbs or the head.

In some embodiments, the ring-type measuring device 600 may be used to measure various physiological data. The physiological data may include at least one of a blood pressure data, an oxygen concentration data, a blood flow rate data, a blood viscosity data, and other physiological data. In some embodiments, the optical physiological signal measuring device 1 with the ring-shaped measuring device 600 can be used as an optical blood pressure measuring device when the physiological data is the blood pressure data. In some embodiments, the ring-type measurement device 600 may perform measurements of various physiological data by photoplethysmography (Photoplethysmography, PPG) measurement methods. Therefore, the optical physiological signal measuring device 1 with the ring-shaped measuring device 600 can also be used as a PPG measuring device. The ring-shaped measuring device 600 can be used to reduce the constraint and clamping force on the knuckle or the knuckle by gently wrapping the first knuckle, the second knuckle, the first knuckle, the second knuckle or the third knuckle of the finger, and maintain the stability and integrity of the PPG physiological signal.

The center of the ring member 610 has a receiving space 602. The accommodating space 602 is used for accommodating the object 6 to be measured to measure various physiological data of the object 6 to be measured. In some embodiments, the ring element 610 may be a C-shaped ring surrounding the receiving space 602. In other words, the C-shaped loop may form a loop opening 601. The ring opening 601 has an opening central angle. The opening central angle may be 0 ° to 60 °. In some embodiments, the opening central angle may be 20 ° to 40 °. The larger the object size of the object 6 to be measured, the larger the central angle the loop element 610 may be stretched. The smaller the object size of the object 6 to be measured, the smaller the central angle the ring element 610 can be pressed slightly. Thus, the loop openings 601 help the loop elements 610 to meet the object sizes of different objects 6 to be measured. In other embodiments, the ring member 610 may be a circular ring surrounding the receiving space 602. In other words, the circular ring may not have the ring opening 601.

The loop element 610 may be made of a plastic material. In some embodiments, the loop element 610 may be made of a thermoplastic material. Thus, when the ring-type measuring device 600 is required to be used, the ring element 610 is slightly heated to have plasticity briefly, and the ring element 610 is wound around the object 6 to be measured to measure physiological data during the period of plasticity. After the measurement is completed, the ring-shaped measuring device 600 can be directly removed, and the next measurement is performed again to determine whether additional reheating is required. In some other embodiments, the loop element 610 may be made of a plastic material. Thus, the loop element 610 may be shaped directly against the loop element 610 to fit the object size of the object 6 to be measured without additional heating during use. After the loop element 610 is shaped, the loop element 610 may be curved to fit the finger without additional clamping force.

The optical signal module 620 may be used to emit the emitted light. The emitted light has the light emission wavelength, and the light emission wavelength is selected according to the influence amount of the blood oxygen concentration on the light absorption coefficient. The emission wavelength is selected from a low blood oxygen influence optical band in which the light absorption coefficient is hardly influenced by the blood oxygen concentration. Although the optical signal module 620 shown in fig. 10A and 10B includes 3 optical elements 621, the number of optical elements 621 may be one or more. In some embodiments, the number of optical elements 621 may be any number from 1 to 6, or more.

In some embodiments, if the optical element 621 of the optical signal module 620 is located on only one side of the ring-type measuring device 600, the optical element 621 of the optical signal module 620 may include the light source module 121 and the light measuring module 122 of the optical module 120 at the same time. Therefore, when the emitted light is emitted from the optical element 621 of the optical signal module 620, the emitted light is reflected by the object 6 to be measured in the accommodating space 602 and then returns to the optical element 621 to be received, so as to complete the measurement of the optical module 120. Therefore, since the measurement of the physiological data is performed only by the optical signal module 620 on one side of the ring-type measuring device 600, the optical signal module 620 can be used as a reflective optical module to serve as the light source module 121 and the light measuring module 122 at the same time.

In other embodiments, if the optical elements 621 in the optical signal module 620 can be distributed on both sides of the ring-type measuring device 600, the different optical elements 621 in the optical signal module 620 can be used as the light source module 121 or the light measuring module 122 in the optical module 120. For example, the ring-type measuring device 600 may have a set of optical signal modules 620 on both sides, wherein the optical element 621 of one optical signal module 620 may be used as the light source module 121, and the optical element 621 of the other optical signal module 620 may be used as the light measuring module 122. Therefore, the emitted light can be emitted by the optical element 621 in one optical signal module 620, and the emitted light is received by the optical element 621 in the other optical signal module 620 after penetrating through the object 6 to be measured in the accommodating space 602, so as to complete the measurement of the optical module 120.

Fig. 11A shows a schematic view of the hoop element 610 illustrated in fig. 10A in a flattened state, in accordance with one or more techniques of the present disclosure. Fig. 11B shows a perspective view of the loop element 610 illustrated in fig. 10A in an annular state, in accordance with one or more techniques of the present disclosure. Fig. 11C shows a perspective view of the optical signal module 620 illustrated in fig. 10A, in accordance with one or more techniques of the present disclosure. Fig. 11A-11C illustrate one example of a loop element 610 and an optical signal module 620, respectively. The loop element 610 and the optical signal module 620 may include more or fewer elements than the icons, or a different configuration of elements with various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

In some embodiments, the loop element 610 may be flattened in this flattened state. To accommodate different sizes of the object, loop elements 610 of different lengths may be made to meet different user needs. In addition, since the ring element 610 may be a C-ring, the size of the opening central angle may also be used to accommodate different object sizes. In some embodiments, if the length of the loop element 610 is too long compared to the object size, the loop element 610 may be shaped similar to the number "6" and the optical signal module 620 may be positioned within the annular range to confirm that the physiological data can be measured correctly.

The loop element 610 may further include a loop base 611 and a loop frame 612. The ring base 611 is coupled to the ring frame 612, and the center of the ring frame 612 forms an optical signal module accommodating portion 6120. The optical signal module accommodating portion 6120 is configured to accommodate the optical signal module 620. The number of the optical signal module accommodating portions 6120 may be determined according to the number of the optical signal modules 620 in the ring-type measuring apparatus 600. In addition, the accommodating size of the optical signal module accommodating portion 6120 may also be determined according to the module size of the optical signal module 620 in the ring-type measuring apparatus 600.

The optical signal module 620 may be coupled to the loop element 610 by various coupling means such as gluing, snap fitting, or snap fitting. In some embodiments, taking fig. 11B and 11C as an example, the optical signal module accommodating portion 6120 may be a ring through hole. The optical signal module 620 may include an outer sidewall 622, an inner sidewall 623, and an intermediate recess 624. The middle recess 624 is formed by the outer sidewall 622 and the inner sidewall 623. Thus, the lateral cross-section of the optical signal module 620 is "I" shaped, such that the optical signal module 620 can be embedded into the loop frame 612 of the loop element 610 through the middle recess 624, thereby filling the loop via. In some other embodiments, the optical signal module accommodating portion 6120 may be a ring groove, so that the optical signal module 620 may be adhered to the ring element 610 by gluing, fitting or buckling, so as to fill the ring groove.

Fig. 12 illustrates a schematic view of the material of the loop element 610 illustrated in fig. 10A, in accordance with one or more techniques of the present disclosure. Fig. 12 shows an example of a loop element 610. The loop element 610 may include more or fewer elements than the figures, or a different configuration of elements having various figures. Additional elements may be added or fewer elements may be used without departing from this disclosure.

In some embodiments, the loop element 610 may be a single layer flexible element. The single-layer soft element can be made of a plastic material. In some embodiments, the loop element 610 may be a multi-layer flexible element. The multi-layer soft element can achieve various effects through the characteristics of different materials. Taking fig. 12 as an example, the loop element 610 may include a breathable layer 6101, a clip layer 6102, and a skin-friendly layer 6103. The ventilation layer 6101 can be made of a ventilation material to avoid stuffy feeling during wearing. In addition, the ventilation layer 6101 may be made of waterproof material, which can keep the ring-shaped measuring device 600 dry and prevent it from being damaged by moisture or wet. The clip layer 6102 can be made of a net-shaped material with high plasticity, and has elasticity and stiffness, and also maintains ventilation effect. Since the skin-friendly layer 6103 directly contacts the object 6 to be measured when the ring-shaped measuring device 600 is worn on the object 6 to be measured, the skin-friendly layer 6103 needs to have an anti-slip skin-friendly surface to avoid excessive friction between the skin-friendly layer 6103 and the object 6 to be measured.

Fig. 13 shows an enlarged view of the area E2 illustrated in fig. 10B, in accordance with one or more techniques of the present disclosure.

Referring to fig. 1 and 13, in some embodiments, the optical element 621 may have a bump design with a plurality of bumps. Since the surface of the object 6 to be measured is usually soft skin, when the surface 6 to be measured contacts with the optical element 621, the optical element 621 serving as the light source module 121 or the light measuring module 122 is slightly recessed due to the soft skin corresponding to the plurality of bumps, so that the surface of the object 6 to be measured and the optical element 621 are closer to each other and are close to each other, which is helpful for reducing the possibility of generating air bubbles in gaps between the optical element 621 and the surface of the object 6 to be measured. In some embodiments, the light source module 121 or the light measuring module 122 may be directly disposed at the plurality of bumps. In some embodiments, the plurality of bumps and the surface of the object 6 to be tested can also generate an anti-slip effect. In some embodiments, the shape of the plurality of bumps may be any shape. In some embodiments, the shapes of the plurality of bumps may each be the same, different from each other, or partially the same or partially different. In some embodiments, the shape of the plurality of bumps may include, but is not limited to, circular, square, triangular, polygonal, etc., as long as the plurality of bumps are higher than the surface of the adjacent surrounding optical signal module 620. In some other embodiments, the optical element 621 may be disposed in a plurality of element spaces 6211 in the optical signal module 620, where the plurality of element spaces 6211 may or may not correspond to the plurality of bumps.

FIG. 14A shows a perspective view of another ring-type metrology device 700 in accordance with one or more techniques of the present disclosure. FIG. 14B shows a top perspective view of the ring-type metrology device 700 illustrated in FIG. 14A, in accordance with one or more techniques of the present disclosure. The ring-type measuring device 700 may include a ring outer frame 710 and a ring inner frame 720. Fig. 14A and 14B illustrate an example of a ring-type metrology apparatus 700. The ring-type measuring device 700 may include more or fewer elements than the icons, or a different configuration of elements with various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

Referring to fig. 1, 14A and 14B, the ring-type measuring device 700 may be coupled to the computing module 110 by a wired or wireless method. For example, it may be coupled to the operation unit 110 through the connection unit 401 as shown in fig. 4A, or directly coupled to the operation unit 110 through a wireless module.

The ring-type measuring device 700 can be used for surrounding an object to be measured of a subject, and the physiological data of the object to be measured can be measured by the ring-type measuring device 700. The object to be measured may be a finger knuckle or a finger knuckle of the subject, and thus the ring-type measuring device 700 may be a ring-type measuring device for encircling the finger knuckle or the finger knuckle of the subject, and measuring the finger knuckle or the finger knuckle to obtain the physiological data of the subject. In some other embodiments, the ring-shaped measuring device 700 may be a hand ring measuring device, a watch measuring device, a foot ring measuring device, a head ring measuring device, etc., which measures by encircling the limbs or the head.

In some embodiments, the ring-type measuring device 700 may be used to measure various physiological data. The physiological data may include at least one of a blood pressure data, an oxygen concentration data, a blood flow rate data, a blood viscosity data, and other physiological data. In some embodiments, the optical physiological signal measuring device 1 with the ring-shaped measuring device 700 can be used as an optical blood pressure measuring device when the physiological data is the blood pressure data. In some embodiments, the ring-type measurement device 700 may perform measurements of various physiological data by photoplethysmography (Photoplethysmography, PPG) measurement methods. Therefore, the optical physiological signal measuring device 1 with the ring-shaped measuring device 700 can also be used as a PPG measuring device. The ring-shaped measuring device 700 can cover the first joint, the second joint, the first knuckle, the second knuckle or the third knuckle of the finger by the cover ring formed by the ring inner frame 720, so as to reduce the restraining force and the clamping force to the knuckle or the knuckle and maintain the stability and the integrity of the PPG physiological signal.

The ring-type measuring device 700 may include at least one ring outer frame 710 and a plurality of ring inner frames 720. At least one of the girdle outer frames 710 encloses a plurality of girdle inner frames 720. The plurality of hoop inner frames 720 each have an inner frame inner side surface 7200, and the plurality of hoop inner frames 720 are looped to form the accommodating space 702. The accommodating space 702 is used for accommodating the object to be tested of the subject so as to measure the physiological data of the subject. The inner side surfaces 7200 of the inner frames 720 are surfaces surrounding the accommodating space 702. In other words, when the object to be measured is placed in the ring-shaped measuring device 700, the inner surfaces 7200 of the inner frames are the surfaces of the ring-shaped measuring device 700 contacting the object to be measured. Thus, the plurality of inner frame inner side surfaces 7200 may have a soft and skin friendly contact surface.

The number of the at least one ring frame 710 may be one or more. When the number of the at least one ring frame 710 is one, the ring frame 710 is a ring-shaped frame of a fixed size. Therefore, although the plurality of ring inner frames 720 have a certain expansion range, the ring outer frames 710 can have different sizes to adapt to the objects to be tested with different object sizes. When the number of the at least one ring frame 710 is plural, the plurality of ring frames 710 may be identical in size, may be completely different, or may be partially identical and partially different. The ring frames 710 may be combined with each other to form a complete ring frame, so that the ring-shaped measuring device 700 may have different sizes to fit different object sizes.

In some embodiments, when the number of the ring frames 710 is one, the plurality of ring frames 720 can be accommodated in a single ring frame 710 to form the accommodating space 702. In some other embodiments, when the number of the ring frames 710 is plural, the number of the plurality of ring inner frames 720 may correspond to the number of the plurality of ring frames 710. For example, the number of the plurality of ring inner frames 720 may be equal to the number of the plurality of ring outer frames 710, or the number of the plurality of ring inner frames 720 may be a multiple of the number of the plurality of ring outer frames 710. In still other embodiments, when the number of the ring frames 710 is plural, the number of the plurality of ring inner frames 720 may be independent of the number of the plurality of ring frames 710. For example, the number of the plurality of ring frames 710 is 3, and the number of the plurality of ring frames 720 is 2.

In some embodiments, at least one of the plurality of looped inner frames 720 may have an optical signal module receiving portion for receiving an optical signal module, and thus there may be a partial looped inner frame 720 without an optical signal module receiving portion. In some other embodiments, all of the annular ring inner frames 720 may have an optical signal module accommodating portion for accommodating an optical signal module. In some embodiments, at least one of the plurality of optical signal module accommodating portions may accommodate an optical signal module, and thus a portion of the optical signal module accommodating portions may not accommodate an optical signal module, but may be in an idle state. In some other embodiments, all of the optical signal module accommodating portions can accommodate the optical signal modules.

The optical signal module accommodated in the optical signal module accommodating portion can be used as the optical module 120 and as an optical device for emitting an emitted light with a wavelength of a light, receiving a detection light after the emitted light is measured, and transmitting the measurement result to the operation module 110. In some embodiments, the emission wavelength is selected based on the amount of influence of the blood oxygen concentration on the light absorption coefficient. The emission wavelength is selected from a low blood oxygen influence optical band in which the light absorption coefficient is hardly influenced by the blood oxygen concentration.

In some embodiments, if only one optical signal module is accommodated in one optical signal module accommodating portion, the optical signal module may include the light source module 121 and the light measuring module 122 in the optical module 120 at the same time. Therefore, after the emitted light is emitted from the optical signal module, the emitted light is reflected by the object to be measured in the accommodating space 702 and then returns to the optical signal module, so as to complete the measurement of the optical module 120. Therefore, since the measurement of physiological data is only performed by the only optical signal module in the ring-type measuring device 700. The optical signal module can be used as a reflective optical module to serve as the light source module 121 and the light measuring module 122 at the same time.

In other embodiments, if the optical signal module accommodation portions on the two sides respectively have optical signal modules, the different optical signal modules can be used as the light source module 121 or the light measuring module 122 in the optical module 120 respectively. For example, the ring-type measuring device 700 may have a set of optical signal modules on two sides, wherein one optical signal module may be used as the light source module 121, and the other optical signal module may be used as the light measuring module 122. Therefore, after the emitted light is emitted by the optical signal module on one side, the emitted light is received by the optical signal module on the other side after penetrating through the object to be measured in the accommodating space 702, so as to complete the measurement of the optical module 120.

FIG. 15A shows a top perspective view of the ring-type metrology device 700 illustrated in FIG. 14A, in accordance with one or more techniques of the present disclosure. FIG. 15B shows a cross-sectional view of the ring-type metrology device 700 taken along line C3-C3 of FIG. 15A, in accordance with one or more techniques of the present disclosure. Fig. 15B shows an example of a ring-type metrology apparatus 700. The ring-type measuring device 700 may include more or fewer elements than the icons, or a different configuration of elements with various icons. Additional elements may be added or fewer elements may be used without departing from this disclosure.

Referring to fig. 1, 14A and 15B, the ring outer frame 710 includes a plurality of ring inner frames 721-724, and each of the plurality of ring inner frames 721-724 may have a corresponding one of a plurality of inner frame inner side surfaces 7210-7240. When the object to be measured is placed in the ring-type measuring apparatus 700, the inner side surfaces 7210 to 7240 of the plurality of inner frames are brought into contact with the object to be measured. Accordingly, the plurality of inner frame inner side surfaces 7210-7240 may have a soft and skin friendly contact surface.

The loop outer frame 710 and the plurality of loop inner frames 721-724 include a plurality of elastic elements 731-734 therebetween. The plurality of elastic elements 731-734 are used to create a spatially varying structure with light flexibility to accommodate different object sizes of objects to be tested. In some embodiments, the plurality of elastic elements 731-734 may be springs, bands, strips, or other elastic materials to achieve the effect of being positioned against the object to be measured. In some embodiments, the plurality of loop inner frames 721-724 may each be coupled to a corresponding one of the plurality of elastic elements 731-734. Thus, the number of the plurality of elastic elements may be equal to the number of the plurality of loop inner frames. In some other embodiments, when the number of the plurality of elastic elements is greater than the number of the plurality of loop inner frames, the plurality of loop inner frames may be each coupled to a corresponding at least one of the plurality of elastic elements. For example, the plurality of loop inner frames 721-724 may each be coupled to more than two elastic elements.

The girdle frame 710 can have a plurality of frame fixation portions 711-714. The outer frame fixing parts 711 to 714 may be coupled with a corresponding one of the plurality of elastic elements 731 to 734, respectively, to fix the plurality of elastic elements 731 to 734 to the ring outer frame 710.

The plurality of looped inner frames 721-724 may have a plurality of inner frame fixation portions 7211-7241 and 7212-7242. The plurality of inner frame fixing portions 7211 to 7241 and 7212 to 7242 may be coupled with a corresponding one of the plurality of elastic elements 731 to 734, respectively, to fix the plurality of elastic elements 731 to 734 to the plurality of ring inner frames 721 to 724.

In some embodiments, the plurality of elastic elements 731-734 may each be a V-shaped elastic element. Each V-shaped spring element has a tip portion and two terminal portions. The tip portions of the respective plurality of elastic members 731 to 734 may be coupled with a corresponding one of the outer frame fixtures 711 to 714. Furthermore, one right terminal portion of each of the plurality of elastic elements 731 to 734 may be coupled with a corresponding one of the inner frame fixtures 7211 to 7241, and one left terminal portion of each of the plurality of elastic elements 731 to 734 may be coupled with a corresponding one of the inner frame fixtures 7212 to 7242. Thus, the plurality of elastic elements 731-734 are coupled and fixed to the outer ring frame 710 by the respective tip portions and are simultaneously coupled to the corresponding one of the plurality of inner ring frames 721-724 by the respective two terminal portions to receive pushing from the plurality of inner ring frames 721-724. In other words, when the object to be measured is placed into the ring-shaped measuring device 700, the ring inner frames 721-724 are pushed by the object to be measured to approach the ring outer frame 710. At this time, the elastic elements 731-734 generate a spatially varying structure with light elasticity by their elastic force to adapt to different object sizes of the object to be tested.

In some other embodiments, the plurality of elastic elements may be all I-shaped elastic elements. Each of the I-shaped resilient elements has two terminal portions. One terminal portion of each of the plurality of elastic members may be coupled with a corresponding one of the plurality of outer frame fixing portions, and another terminal portion of each of the plurality of elastic members may be coupled with a corresponding one of the plurality of inner frame fixing portions. Therefore, the plurality of elastic elements are respectively coupled with the ring outer frame and the corresponding ring inner frame through the two terminal parts so as to bear pushing from the plurality of ring inner frames. In other words, when the object to be measured is put into the annular measuring device, the annular inner frames are pushed by the object to be measured and approach the annular outer frames. At this time, the elastic elements generate a space variation structure with light elasticity through the elasticity of the elastic elements so as to adapt to different object sizes of the object to be detected.

In some embodiments, the telescoping range of the ring-type measuring device is about 1mm to about 6mm. In some embodiments, the telescoping range of the ring-type measuring device is about 2mm. In some embodiments, the stretching direction of the ring-type measuring device may be multi-directional stretching to increase the stretching space. In some embodiments, the number of telescoping directions may be 2,3,4, 5, etc. in a variety of directions. In some embodiments, the number of the telescopic directions of the ring-type measuring device 700 may be 4.

In some embodiments, the telescoping direction of the ring-type measuring device 700 may be determined by the number of the plurality of ring inner frames 721-724. In some other embodiments, the direction of the ring-type measuring device 700 can be determined by the number of the plurality of elastic elements 731-734.

The embodiments shown and described above are examples only. Many details are often found in the art. Accordingly, many of these details are neither shown nor described. Although many features and advantages of the present disclosure have been set forth in the foregoing description, together with details of the structure and function of the disclosure, the disclosure is illustrative only and changes may be made in detail. It is therefore to be understood that the above-described embodiments may be modified within the scope of the appended claims.

Claims (11)

1. A photoplethysmography, PPG, measurement device comprising:

   An outer housing;

   An inner housing coupled to the outer housing and movable relative thereto, wherein:

   An accommodating space is arranged between the outer shell and the inner shell for accommodating an object to be tested, and

   The space size of the accommodating space is changed along with the relative movement between the outer shell and the inner shell;

   A first magnetic unit arranged on an outer side surface of the outer shell;

   a second magnetic unit disposed on an inner side surface of the inner housing, and

   An optical signal module coupled to the outer housing and configured to measure the object to be measured,

   The first magnetic unit and the second magnetic unit have a magnetic acting force therebetween, and the magnetic acting force drives the space size of the accommodating space to adapt to an object size of the object to be detected.
2. The PPG measurement device of claim 1 wherein:

   The optical signal module is used for receiving a detection light after measuring the object to be measured by a radiation light or for emitting the radiation light, and

   The emitted light has a light-emitting wavelength, and the light-emitting wavelength is selected according to an influence amount of the blood oxygen concentration on the light absorptivity.
3. The PPG measurement device of claim 2 wherein:

   The emission wavelength is selected from a low blood oxygen influence optical band in which the light absorption rate is not influenced by the blood oxygen concentration.
4. The PPG measurement device of claim 1, further comprising:

   an outer cover coupled to the outer housing to form a first component assembly, and

   And the inner cover is coupled with the inner shell to form a second element combination, and the accommodating space is formed between the inner cover and the inner shell.
5. The PPG measurement device of claim 4 wherein the inner housing further comprises:

   An inner housing base coupled with the inner cap, wherein:

   The accommodation space is formed by the inner shell base and the inner cover, and

   The first element is combined to cover the inner shell base and the inner cover, and

   A flexible tab projecting outwardly from one of the sides of the inner housing base and extending along the outer housing outer surface of the outer housing to encase the outer housing, wherein:

   the second magnetic unit is arranged on the inner side surface of one wing piece of the elastic wing piece,

   One of the elastic force and the magnetic force of the elastic wing piece drives the outer shell to approach the outer cover so that the space size of the accommodating space is matched with the object size of the object to be detected, and

   Through the interaction between the magnetic acting force and the elastic force, the pressure exerted by the inner cover on the object to be detected is reduced.
6. The PPG measurement device of claim 4 wherein:

   The outer housing includes a first sliding portion,

   The outer cover includes a second sliding portion, and

   The first sliding part and the second sliding part are slidably coupled, so that the first sliding part and the second sliding part can relatively move to adjust the space size of the accommodating space.
7. The PPG measurement device of claim 6, further comprising:

   a coupling shaft coupled with the outer cap, wherein:

   The first sliding part comprises a first sliding shaft and a first sliding rail,

   The second sliding part comprises a second sliding rail,

   The first sliding shaft is slidably coupled with the second sliding rail, so that the first sliding shaft can slide along a first sliding direction in the second sliding rail, and

   The connecting shaft is slidably coupled with the first sliding rail, so that the connecting shaft can slide along a second sliding direction in the first sliding rail.
8. The PPG measurement device of claim 4 wherein:

   The second component assembly has an opening and a joint, and

   The inner side surface of the inner shell has an inclination angle along a front-back direction from the opening portion to the joint portion, so that an opening cross-sectional area of the accommodating space at the opening portion is larger than a joint cross-sectional area of the joint portion.
9. The PPG measurement device of claim 8 wherein:

   The joint part is provided with a joint plane,

   The middle of the inner side surface of the inner shell has a middle oblique line along the front-back direction, and

   The middle oblique line has the inclination angle of 3-7 degrees with a normal line of the joint plane.
10. The PPG measurement device of claim 1 wherein:

    the inner side surface of the inner shell comprises an inner shell friction part adjacent to the accommodation space, and

    The inner shell friction portion has a friction coefficient higher than that of other portions of the inner shell inner side surface.
11. An optical blood pressure measurement device, comprising:

    a magnetic levitation measurement device, which is a photoplethysmography PPG measurement device as defined in any one of claims 1-10, and

    The operation module is coupled with the magnetic levitation device to calculate blood pressure data according to a measurement signal obtained by the magnetic levitation device.