JPH08191800A - Thermometer and clinical thermometer - Google Patents

Abstract

PURPOSE: To reduce waiting time for measurement, by adding a temperature adjusting value to the temperature value data which are calculated from the temperature data of a infrared sensor and a standard temperature sensor. CONSTITUTION: This thermometer is a thermometer 1 with which is measured temperature of a desirable site of an object uncontactly and is also provided with a probe member 3 in which inner circumference face part continuously formed from an opening part 3c is formed, and a light guiding part 4 which guides infrared R to a receiving part of an infrared sensor 5 through the infrared sensor 5 for detecting the radiated infrared R and the first space part S1. Futhermore, this thermometer is also provided with an adjusting temperature sensor 7 which is fixed by ensuring the second space part S2, a standard temperature sensor 8 which is fixed in close contact with the infrared sensor 5 by providing the third space part S3 in its circumference, and a control means with which is calculated the temperature value based on outputs from the infrared sensor 5 and the standard temperature sensor 8 and the adjusting temperature sensor 7. And thermal equilibrium of the thermometer 1 is sought to be reached at high-speed, by providing the forth space part S4 between the inner circumference part and the outer circumference face of the light guiding part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermometer and a thermometer which measure by a non-contact method, and in particular, insert a probe tip into an ear canal to detect the temperature of the eardrum or the ear canal near the eardrum (that is,
The present invention relates to a thermometer and a thermometer applied to a thermometer that accurately measures (substantial eardrum temperature).

[0002]

2. Description of the Related Art In recent years, electronic thermometers have become widespread in place of conventional glass thermometers. The characteristic of this kind of electronic thermometer is that it is hard to break even if some external force is applied,
Moreover, since mercury is not used, it is possible to measure temperature with excellent safety, and it is widely used in general households. The time required for measuring the temperature of these electronic thermometers is about 1 to 2 minutes in the electronic thermometer having the predictive function. Further, according to the electronic thermometer that does not have the predictive function,
It takes more time. Therefore, in such an electronic thermometer, time is required until each measurement site reaches thermal equilibrium in the temperature measurement in the mouth and underarm.

Therefore, recently, a non-contact thermometer has been proposed which effectively utilizes infrared radiation from the eardrum or the external auditory meatus near the eardrum (that is, the substantial temperature of the eardrum). This non-contact thermometer uses the phenomenon that all objects or living bodies that have risen to a predetermined temperature emit infrared rays.
It is possible to instantly measure the object temperature or the body temperature of the living body without having to have a thermal equilibrium state between the measurement site and the temperature sensor like the electronic thermometer described above.

On the other hand, it has become clear in recent years that the tympanic membrane as a body temperature measuring portion of a living body accurately reflects the temperature of the internal carotid artery, and is attracting attention as a portion capable of measuring the core temperature of a human. Therefore, it has become possible to safely measure the eardrum temperature that reflects the core temperature safely in an extremely short time by using a non-contact thermometer that detects the eardrum temperature. Further, among such non-contact type thermometers, a thermometer for accurately calculating the temperature value by observing the temperature around the infrared sensor itself in addition to the temperature detection by the infrared sensor is disclosed in, for example, Japanese Patent Application Laid-Open No. 2-35322.
It has been proposed in Japanese Laid-Open Patent Publication No. 2003-242242, and it becomes possible to measure the body temperature more accurately.

[0005]

However, according to the above-mentioned conventional non-contact type clinical thermometer, the heat balance around the infrared sensor is broken, so that it takes a long time for each measurement to wait for the heat balance to stabilize. There was a problem that required an interval time. In addition, a temperature drift may occur in the measured value.

On the other hand, according to the "radiation thermometer" disclosed in the above-mentioned Japanese Patent Laid-Open No. 2-35322, the thermal balance of the infrared sensor is measured in advance to reduce the temperature drift, and the waiting time for the measurement is partially unnecessary. It is excellent in that.

However, such a radiation thermometer is not a structure that accelerates thermal equilibrium particularly in the structure around the infrared sensor. Specifically, since the temperature of the infrared sensor itself is not accurately measured, there is a problem that the condition for making the waiting time (interval time) for each measurement almost "zero" is limited.

Further, according to the structure of this "radiation thermometer", if the heat balance is once largely lost, the normal state can be measured again due to the relationship between the heat conduction and the specific heat of each component. There is a problem that it takes a long time.

Therefore, the present invention has been made in view of the above problems, and in the non-contact thermometer, the inconvenience in use can be eliminated by substantially eliminating the waiting time for each measurement, and heat An object of the present invention is to provide a thermometer that can be used as usual without causing temperature drift even after the balance is lost.

Further, in a thermometer for non-contact temperature measurement of the eardrum or the ear canal near the eardrum (that is, the substantial temperature of the eardrum), the inconvenience in use can be eliminated by substantially eliminating the waiting time for each measurement, Moreover, it is an object of the present invention to provide a thermometer that can be used as usual without causing a temperature drift even after the heat balance is lost.

[0011]

In order to achieve the above object, a thermometer of the present invention has the following constitution. That is, a thermometer that measures the temperature of a desired portion of an object in a non-contact manner, the probe member having an opening directed toward the desired portion and an inner peripheral surface formed continuously from the opening. When,
An infrared sensor that is disposed inside the opening and that detects infrared rays emitted from the desired portion, and a hollow that guides the infrared ray from the opening to the light receiving portion of the infrared sensor with minimum attenuation. A tube part, a light guide part provided in the hollow tube part and for guiding infrared rays to the light receiving part of the infrared sensor through the first space part at the end of the hollow tube part, and the light guide part In order to detect the temperature of itself and its vicinity and to speed up thermal equilibrium, a second space is secured between the inner peripheral surface and the inner peripheral surface, and the second space is closely attached and fixed in the vicinity of the light guide. A temperature sensor for correction, a reference temperature sensor fixed in close contact with the infrared sensor by providing a third space around the infrared sensor to detect the temperature of the infrared sensor itself, and the infrared sensor. Sensor and reference temperature Characterized by comprising a control means for calculating the temperature value based on the output from the capacitors and the correction for temperature sensor. In addition, the thermometer is characterized in that the fourth space portion is provided between the inner peripheral surface portion and the outer peripheral surface of the light guide portion to accelerate the thermal equilibrium.

In the thermometer, an umbrella-shaped portion extending from an end of the light guide portion and a flange portion extended from the umbrella-shaped portion are integrally formed, and the thermometer is provided with the first portion inside the flange portion. And a fastening member for forming sufficient space between the infrared sensor and the light guide portion by tightening the flange portion in the radial direction with respect to the container of the infrared sensor. It is characterized by doing.

Further, in the thermometer, the fastening member is formed of a material having excellent thermal conductivity and a substantially sufficient heat capacity so as to make the thermal influence on the infrared sensor substantially uniform, and It is characterized in that the space portion of is integrally formed.

Further, the thermometer is characterized in that the light guide portion is made of the same material which is excellent in thermal conductivity and has a substantially uniform plate thickness over the whole in order to make the thermal conductivity uniform. To do.

Further, the thermometer is characterized in that a window member for transmitting infrared rays and a holding member for holding the window are provided at a tip portion of the light guide portion.

Further, in the correction temperature sensor, the thermometer is provided on the outer peripheral surface portion at a position within -3 mm to 10 mm from the boundary of the umbrella portion for forming the first space portion toward the tip portion. It is characterized by being closely attached and fixed.

A thermometer for measuring the temperature of the eardrum of the living body and / or the ear canal portion near the eardrum (that is, substantially the temperature of the eardrum) in a non-contact manner, the opening being directed toward the eardrum or the ear canal portion. Portion, and a probe member having an inner peripheral surface portion continuously formed from the opening portion, and an infrared sensor disposed inside the portion separated from the opening portion and detecting infrared rays emitted from the eardrum or the ear canal region. A hollow tube portion for guiding the infrared ray from the opening portion to the light receiving portion of the infrared sensor with a minimum attenuation, and a first space portion provided in the hollow tube portion at an end portion of the hollow tube portion. A light guide part that guides infrared rays to the light receiving part of the infrared sensor via a light guide part, and the inner peripheral surface part for detecting the temperature of the light guide part itself and accelerating thermal equilibrium. Confirm the space of 2 A temperature sensor for correction, which is fixed in close contact with the vicinity of the light receiving section, and a third space is provided around the infrared sensor to detect the temperature of the infrared sensor itself. A fixed reference temperature sensor, control means for calculating a temperature value based on outputs from the infrared sensor, the reference temperature sensor, and the correction temperature sensor, and a display means for displaying the temperature value. It is characterized by including.

Further, the thermometer is characterized in that a fourth space portion is provided between the inner peripheral surface portion and the outer peripheral surface of the light guide portion so as to speed up thermal equilibrium.

In the thermometer, an umbrella-shaped portion extending from the end of the light guide portion and a flange portion extending from the umbrella-shaped portion are integrally formed, and the first portion is provided inside the flange portion. And a fastening member for forming sufficient space between the infrared sensor and the light guide portion by tightening the flange portion in a radial direction with respect to the container of the infrared sensor. It is characterized by

Further, in the thermometer, the fastening member is formed of a material having excellent thermal conductivity and a substantially sufficient heat capacity so as to make the thermal influence on the infrared sensor substantially uniform, and It is characterized in that the space portion is integrally formed.

Further, the thermometer is characterized in that the light guide portion is made of the same material which is excellent in heat conductivity and has a substantially uniform plate thickness in order to make the heat conduction uniform. .

Further, the thermometer is characterized in that a window member for transmitting infrared rays and a holding member for holding the window are provided at the tip of the light guide section.

Further, in the thermometer, the correction temperature sensor is in close contact with the outer peripheral surface portion at a position within -3 mm to 10 mm from the boundary of the umbrella portion for forming the first space portion toward the tip end portion. It is characterized by being fixed.

[0024]

With the above configuration, the reference temperature sensor is added to the temperature value data calculated from the temperature data of the reference temperature sensor that measures the temperature of the infrared sensor and the infrared sensor itself.
By adding the temperature correction value calculated from the temperature data from the correction sensor that measures the temperature of the light guide part itself and / or its vicinity, it is possible to perform temperature measurement with almost no measurement waiting time at all times, and, for example, around the infrared sensor. It works to correct the temperature drift that occurs when the heat balance is lost in the part.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a central sectional view of a thermometer 1 showing only an optical system and a temperature sensor and its surroundings. The processing system of FIG.

In this figure, a hollow probe tip member 3 made of a predetermined resin and having the illustrated shape is fixed to the tip of the main body 2 shown by the broken line. The material of the probe tip member 3 is not particularly limited as long as it is a commonly used thermoplastic resin material such as ABS resin, and more preferably a material having a heat insulating function.

The probe tip member 3 is composed of a hollow tube having a substantially circular shape, and integrally has a shape portion 3a having a tapered outer shape as shown in the drawing, and the eardrum and / or the ear canal near the eardrum (that is, substantially). An opening 3c for entering infrared rays radiated from the eardrum is formed at the tip end portion of the eardrum, and an inner peripheral surface 3b which is continuous from the opening 3c and has substantially the same inner diameter is formed. The inner peripheral surface 3b is configured so that the inner diameter thereof gradually increases as shown in the figure until reaching the end portion of the probe main body 2 as shown in the figure. The space portion S2 can be provided.

The inner peripheral surface 3 of the probe tip member 3
A mounting portion 3e shown by a broken line in the drawing is integrally formed in b at its symmetrical position, and a holder component 6 to be described later is inserted through a stopper component 10 shown by a chain double-dashed line.
The infrared sensor 5 fixed in the holder component 6 and the light guide section 4 fixed to the sensor 5 are fixed (locked) by a screw 11 (shown in broken lines) at a predetermined position in the figure. I try to hold it. Further, a chamfered portion 3d having an R chamfering with a radius of about 1 mm is formed around the opening 3c so as not to cause a pain to a patient at the time of insertion.

On the other hand, the infrared sensor 5 is a so-called can type in which a large number of thermocouples (thermopile) for converting infrared rays into electric signals are built in a metal container having a shape as shown in the drawing, and the above-mentioned light guide portion 4 is provided. Infrared rays R that pass through the inside and enter are gathered from a light entrance portion 5a shown by a broken line on a thermopile to convert the infrared rays R into an electric signal and then taken out to the outside through a signal line 103. . The infrared sensor 5 may be of any type as long as it can detect infrared rays, such as a thermistor bolometer or a pyroelectric element. Further, this infrared sensor 5 has a holder part 6
A spacer component 15 is provided as shown so as to be fixed in place inside.

Next, a reference temperature sensor 8 is provided in close contact with the side surface portion of the container of the infrared sensor 5, and is constructed so as to measure the temperature of the infrared sensor 5. It is possible to input to the control circuit board through the signal line 102 using a thin wire having a small FPC) or electrothermal influence.

Further, a correction temperature sensor 7 is provided in close contact with a side surface portion of the light guide portion 4 where the space S2 is secured as described above, and the light guide portion 4 itself. The same FPC signal line 1 as above, while enabling measurement of the temperature of
The detection signal can be input to the control circuit via 01. For the correction temperature sensors 7 and 8 described above, any temperature sensor having a small heat capacity such as a thermistor or a diode may be used, and a sensor including a thermocouple may be used.

Here, the correction temperature sensor 7 is disposed at a position about 2 m from the opening 4c of the light guide 4 in the tip direction.
The portion m is the best in view of the mutual relation of the above-mentioned space S2, but the present invention is not limited to this portion, and if it is within a range of -3 mm on the infrared sensor 5 side to 10 mm on the opening 4a side from the position of the opening 4c The position may be anywhere, in short, as long as the space S2 can be secured.

2 is an external perspective view of the light guide tube 4 of FIG. 1, which will be described with reference to FIG. 2 with reference to FIG. In order to improve the thermal contact with the infrared sensor 5 and to make a thermally uniform opening 4c in the visual field of the light entrance portion 5a of the infrared sensor 5, the light guide portion 4 has an opening 4c. The flange portion 4f is continuously formed at the edge portion of the umbrella portion 4k that spreads like a dish, and the portion whose inner diameter fits the outer diameter of the can of the infrared sensor 5 is continuously formed. The shape is such that it surrounds the temperature-sensitive portion of the sensor 5.

In addition, in order to prevent the heat balance of the sensor 5 itself from being lost, the light guide portion 4 of FIG. A space S1 is provided inside. In addition, the light guide section 4
Is formed into a tubular shape, and is made of a metal having excellent thermal conductivity such as gold, copper, silver, or an alloy thereof, or a plated metal of these, and when inserted into the ear canal, In order to prevent heat from being directly transmitted, the inner peripheral surface 3b of the tapered shape portion 3a and the light guide portion 4 are formed.
A space S4 is provided between the outer peripheral surface and the outer peripheral surface. Light guide 4
4a for making the centers of the probe tip member 3 substantially the same
And 3d may be configured so as to partially contact each other. Also,
The light guide portion 4 has a function of being fastened to the outer peripheral surface of the container of the infrared sensor 5 by the holder component 6,
Further improve the thermal contact between each other, and infrared sensor 5
In order to allow the heat conduction to be balanced and uniform within the field of view, the thickness of the light guide portion 4 is configured to be substantially uniform as a whole, and is composed of a continuous structure of the same material.
Further, in order to enhance thermal contact with the infrared sensor 5, a flange portion 4e having an outer diameter of the container of the sensor 5 as an inner diameter.
The slit portions 4f are formed at intervals of 90 degrees, and after setting the infrared sensor 5 as described later, by tightening the holder component 6, each flange portion 4e is separated from the container portion by the slit portion 4f. It transforms into a shape so that it can contact each other without any gap. Further, in order to reduce the thermal loss of infrared rays passing through the inside of the light guide portion 4 formed in a substantially circular hollow tube as shown in the drawing, the inner surface portions 4b and 4k are made to have a substantially mirror surface portion. After finishing, it is nickel plated and then gold plated.

Next, FIG. 3 is a central cross-sectional view near the opening 4a of the light guide portion. In this figure, the opening 4a of the light guide 4 is shown.
An infrared transmission window 12 for preventing foreign matter from entering is provided inside the window holder 1 having an opening 13a formed therein.
It is fixed to the position shown by 3. The infrared transmitting window 12 may be made of any infrared transmitting material such as silicon or germanium, and is particularly preferably a material that reduces the influence on the light guide section 4. Further, in order to minimize the thermal influence on the light guide portion 4 when the tip portion 3a of the probe tip member 3 is inserted into the ear canal, it is desirable that the window holder 13 does not contact the inner peripheral surface 3b, and the space portion This can be achieved by extending S4 to this site.

Next, FIG. 4 is a sectional view taken along the line AA of FIG. 1, showing only the holder component 6. FIG. 5 is a sectional view taken along the line BB of FIG. First, in FIG. 4, the holder part 6 is the flange part 4 of the light guide part 4 described above.
An opening 6b for holding the edge of the umbrella portion continuous with e is formed as shown in the figure, while the reference temperature sensor 8 is housed in the opening 6b while securing the space S3. The groove portion 62 is formed. A slot 6c is formed on the opposite side of the groove 62, and a slot 6d is formed in the slot 6d for tightening the slot 6c in the arrow H direction in the radial direction by using a screw 11. The light guide tube 4 is brought into close contact with the container of the infrared sensor 5 by tightening the screws. Note that the holder component uses aluminum in order to have excellent heat conductivity and sufficient heat capacity.

Next, with further reference to FIG. 5, a shape portion 61 which is embedded in the mounting portion 3e shown by the broken line in FIG. 1 is formed as shown, and the screw 11 is inserted into each hole portion 6e. It is configured to be screwed after being inserted to the opposite side. Further, as shown in the drawing, the internal structure of the holder component 6 is configured such that the flange portion of the light guide portion 4 is positionally fixed and fixed to the inclined surface portion 6f continuously formed from the opening portion 6b. With the above configuration, the reference temperature sensor 8 is in close contact with the side surface of the infrared sensor 12, and
Since the other members are provided so as not to come into contact with the space of the groove 62 and the thermal contact is improved as described above, the temperature of only the sensor 5 is accurately detected, and the temperature of the other members is not detected. Almost unaffected.

Finally, FIG. 6 is a functional block diagram of the thermometer. In this figure, a thermometer 1 is composed of a main body portion 2 and a probe tip portion 3 fixed at this end portion as an exterior article, and a holder part is used inside the probe tip portion 3 to mount an infrared sensor 5 While being fixed, the light guide section 4
There is a temperature sensor 7 for correction on the side of the
A reference temperature sensor 8 is provided in each of the sensors, and is connected to a signal amplification unit 20 that electrically amplifies the temperature information of each sensor via signal lines 101 and 102. The signal amplification unit 20 is also connected to a signal conversion unit 21 that digitizes an analog electric signal having an amplified waveform and converts it into numerical data. The signal conversion unit 21 is connected to a calculation control unit 22, which controls a body temperature value calculation and each function. In addition, this arithmetic control unit 22
The data storage unit 23 is connected to a storage unit having a function of accumulating various coefficients required when the calculation control unit 22 calculates a body temperature value. The data storage unit 23 also has a function of temporarily storing the data generated during the calculation of the body temperature value and a function of storing the previous value in the body temperature value measurement. Then, the arithmetic control unit 2
A display unit 24 is connected to a functional unit 2 having a function of displaying a temperature value and other control information by a liquid crystal, a light emitting diode or the like.

In the above structure, the infrared sensor 5 and
The temperature value is calculated from the measured values of the reference temperature sensor 8 that almost accurately measures the temperature of the infrared sensor 5 itself and the correction temperature sensor 7 that is arranged near the light guide unit 4, and the temperature is calculated after a predetermined calculation. Can be displayed.

According to the configuration of the embodiment described above, the temperature data from the infrared sensor, the reference temperature sensor for observing the temperature of the infrared sensor itself, and the correction temperature sensor arranged near the light guide portion are measured. By calculating the body temperature value, it is possible to measure the body temperature even when the heat balance around the infrared sensor is disturbed. It becomes possible to measure the body temperature sequentially with time (interval time), and the effect can be exhibited particularly when the non-contact type thermometer is used as a thermometer.

The thermometer is not limited to a thermometer, and it can be used in all industrial fields where the temperature of an object is measured in a non-contact manner, and it goes without saying that it is particularly effective in the measurement field where the interval time is short.

Further, according to the above-mentioned embodiment, the light guide tube 4 fixed to the infrared sensor 5 is provided as a separate component because the infrared sensor 5 is a commercially available product, but at least the above-mentioned first to third parts are provided. As long as it is integrally configured so that the space part can be formed, the integrated structure can be configured to further ensure the degree of freedom in design and further reduce the cost. Therefore, it goes without saying that various other configurations defined at least in the claims are possible.

[0043]

As described above, according to the present invention, in a thermometer for measuring a measurement site of an object in a non-contact manner, the inconvenience in use can be eliminated by substantially eliminating the waiting time for each measurement. In addition, it is possible to provide a thermometer that can be used almost normally without causing a temperature drift even after the heat balance is lost.

Further, in a thermometer for measuring the eardrum or the ear canal in a non-contact manner, the inconvenience in use can be eliminated by substantially eliminating the waiting time for each measurement, and the temperature drift even after the heat balance is disturbed. It is possible to provide a thermometer that hardly occurs and can be used almost as usual.

[0045]

[Brief description of drawings]

FIG. 1 is a central cross-sectional view showing a main part configuration of a probe portion of a thermometer according to an embodiment.

FIG. 2 is an external perspective view of a light guide tube 4.

FIG. 3 is a central cross-sectional view of a tip portion of a light guide tube 4.

FIG. 4 is a sectional view taken along the line AA of FIG. 1, showing only the holder component 6.

5 is a sectional view taken along the line BB of FIG. 4, showing only the holder part 6;

FIG. 6 is a block diagram showing a functional configuration of a thermometer.

[Explanation of symbols]

 1 Thermometer 2 Probe Main Body 3 Probe Tip 3c Opening 4 Light Guide 5 Infrared Sensor 6 Holder Parts 7 Correction Temperature Sensor 8 Reference Temperature Sensor 12 Infrared Passing Window 13 Window Holder S1 Space (First Space) S2 space part (second space part) S3 space part (third space part) S4 space part (fourth space part) R infrared ray

Claims (14)

[Claims] 1. A thermometer for measuring the temperature of a desired part of an object in a non-contact manner, the opening part being directed toward the desired part, and an inner peripheral surface part continuously formed from the opening part. A probe member, an infrared sensor disposed inside the opening separated from the opening and detecting infrared rays emitted from the desired portion, and a hollow for guiding infrared rays from the opening to the light receiving portion of the infrared sensor. A tube section, a light guide section provided in the hollow tube section and for guiding infrared rays to the light receiving section of the infrared sensor through the first space section at the end of the hollow tube section, and the light guide section In order to detect the temperature of itself and / or its vicinity and to speed up thermal equilibrium, a second space is secured between the inner peripheral surface and the inner peripheral surface, and the second light is closely adhered and fixed near the light guide. Correction temperature sensor, the red A reference temperature sensor, in which a third space portion is provided around the infrared sensor and fixed in close contact with the infrared sensor to detect the temperature of the line sensor itself, the infrared sensor and the reference temperature sensor And a control means for calculating a temperature value based on outputs from the correction temperature sensor, and a thermometer. 2. The thermal equilibrium is speeded up by providing a fourth space portion between the inner peripheral surface portion and the outer peripheral surface of the light guide portion. thermometer. 3. An umbrella-shaped portion extending from an end of the light guide portion and a flange portion extended from the umbrella-shaped portion are integrally formed, and the first space portion is inside the flange portion. And a fastening member for tightening the flange portion in a radial direction with respect to the container of the infrared sensor to obtain sufficient thermal contact between the infrared sensor and the light guide portion. The thermometer according to claim 1. 4. The fastening member is formed of a material having excellent thermal conductivity and a substantially sufficient heat capacity so as to make the thermal influence on the infrared sensor substantially uniform, and the third fastening member.
4. The thermometer according to claim 3, wherein the space portion is integrally formed. 5. The light guide part is made of the same material which is excellent in heat conductivity and has a substantially uniform plate thickness over the whole in order to make the heat conductivity uniform. 4. The thermometer according to claim 3. 6. The window member for transmitting infrared rays and the holding member for holding the window are provided at the tip of the light guide portion, as claimed in any one of claims 1 to 3 and 5. The indicated thermometer. 7. The correction temperature sensor is fixedly attached to the outer peripheral surface portion at a position within -3 mm to 10 mm from the boundary of the umbrella portion for forming the first space portion toward the tip portion. The thermometer according to claim 1, wherein the thermometer is a thermometer. 8. A thermometer for measuring the temperature of the eardrum of a living body and / or the ear canal portion near the eardrum in a non-contact manner, the opening being directed toward the eardrum and / or the ear canal portion near the eardrum, and the opening. A probe member formed with an inner peripheral surface portion continuously formed from, an infrared sensor that is disposed inside the opening and that detects infrared rays emitted from the eardrum or the ear canal portion, and from the opening A hollow tube portion that guides infrared rays to the light receiving portion of the infrared sensor, and a light receiving portion of the infrared sensor that is provided in the hollow tube portion and through a first space portion at an end of the hollow tube portion. A second space is secured between the light guide part for guiding infrared rays, the temperature of the light guide part itself and / or its vicinity, and the inner peripheral surface part for speeding up thermal equilibrium. Shi A temperature sensor for correction, which is fixed in close contact with the vicinity of the light guide section, and a third space is provided around the infrared sensor to detect the temperature of the infrared sensor itself. A reference temperature sensor that is fixed in close contact, a control unit that calculates a temperature value based on outputs from the infrared sensor, the reference temperature sensor, and the correction temperature sensor, and a display unit that displays the temperature value. And a thermometer. 9. The thermal equilibrium is speeded up by providing a fourth space portion between the inner peripheral surface portion and the outer peripheral surface of the light guide portion. Thermometer. 10. An umbrella-shaped portion extending from an end portion of the light guide portion and a flange portion extended from the umbrella-shaped portion are integrally formed, and the first space portion is inside the flange portion. And a fastening member for tightening the flange portion in a radial direction with respect to the container of the infrared sensor to obtain sufficient thermal contact between the infrared sensor and the light guide portion. The thermometer according to claim 8. 11. The fastening member is formed of a material having excellent thermal conductivity and having a substantially sufficient heat capacity so as to make a thermal influence on the infrared sensor substantially uniform, and the third space portion. It is formed integrally.
The thermometer described in. 12. The light guide unit is made of the same material having excellent heat conductivity and having a substantially uniform plate thickness throughout for uniform heat transfer. 11. The thermometer according to claim 10. 13. The window member for transmitting infrared rays and the holding member for holding the window are provided at the tip of the light guide portion, as claimed in any one of claims 8 to 10.
The thermometer according to 2. 14. The correction temperature sensor is fixed by being closely attached to the outer peripheral surface portion at a position within -3 mm to 10 mm from the boundary of the umbrella portion for forming the first space portion toward the tip end portion. The thermometer according to claim 8, wherein the thermometer is a thermometer.