JPH0428341A - Body temperature detecting device - Google Patents

Abstract

PURPOSE:To permit the correct body temperature measurement with the small-sized device by allowing a detection sensor for detecting the ultrared ray quantity supplied from a drum-membrane, to be equipped with a guide pipe and a sensor part having a cylindrical guide piece which covers the guide pipe through a thermal transmission suppressing space and is arranged so as to be coaxial with the pipe. CONSTITUTION:An ultrared ray detection sensor part 2 for detecting the ultrared ray quantity supplied from a drum-membrane is equipped with a guide pipe 13 equipped with a wave guide 13b which fixes the ultrared ray detected sensor and introduces the ultrared ray into the sensor and a cylindrical guide piece 12 which is arranged so as to cover the guide pipe 13 through a space in order to suppress the temperature change of the above-described pipe 13. Further, when the distance from the top edge of the guide piece to the top edge of the wave guide is represented by l1, and the distance from the top edge of the guide piece to the ultrared ray incidence plane of the ultrared ray detection sensor is represented by l2, where l1 and l2 should be within a range of l1/l2=0.3-0.6, and when the area of the ultrared ray incidence surface of the sensor is represented by S1, and the opening area of the top edge part of the guide piece is represented by S2, where S1 and S2 should be within a range of S2/S1<20.

Description

[Detailed Description of the Invention] Industry ↓9 Drama U,, lkJ The present invention detects the amount of infrared rays emitted from the patient's eardrum,
The present invention relates to a temperature measuring device that analyzes and detects a patient's body temperature.

As the temperature measuring device mentioned above, the one shown in Japanese Patent Application Laid-open No. 117422/1983 is known. FIG. 23 is a sectional view of the temperature measuring device, FIG. 24 is an exploded perspective view, FIG. 25 is a plan view of the guide piece, and FIG. 26 is an explanatory diagram when measuring body temperature using the temperature measuring device.

As shown in FIGS. 23 and 24, a thermopile 101 that detects the amount of infrared rays from the eardrum is connected to a metal housing 10.
It is housed in a recess 103 formed on the bottom surface of 2.

The thermopile 1.01 and the metal housing 102 are in thermal contact via thermal grease to form a structure that suppresses temperature changes in the thermopile 101.
1 is provided with a waveguide 104 for introducing infrared rays. The outside of this waveguide 104 is covered with a guide piece 105. The method of fixing this guide piece +05 and the metal housing 102 is as follows:
This is done by a female thread 107 formed on the inner periphery of the metal housing 102 and a male thread 108 formed on the outer periphery of the metal housing 102. Furthermore, in order to arrange the waveguide 104 and the guide piece 105 coaxially, four small rib-like protrusions 106 (not shown in FIG. 25) are formed on the inner periphery of the tip of the guide piece 105. When fixed, these small protrusions 106 and the waveguide 1
The tip of 04 contacts and becomes coaxial.

In addition, when measuring body temperature using the temperature measuring device described in -11,
As shown in FIG. 26, this is performed by inserting the guide piece 105 into the external ear canal (the ear hole up to the eardrum 111) 110 and detecting infrared rays emitted from the eardrum 111.

However, the conventional temperature measuring device described above had the following problems.

■Since the guide piece 105 and the metal housing 102 (including the waveguide 104) are in contact via the small protrusion 106 and the threaded part, the guide piece 105 is connected to the outer ear canal 1.
When inserted into the waveguide 10 , the temperature of the external ear canal 106 is transmitted to the waveguide 104 via the guide piece 105 . As a result, the amount of infrared radiation emitted from the inner wall of the waveguide 104 changes, and the output of the thermopile 101 fluctuates, making it impossible to accurately measure body temperature.

Therefore, in order to prevent such problems, a heater 114 is provided on the back surface of the substrate 113 to control the metal housing 102 and the guide piece 105 to a constant temperature near body temperature.

However, even with such a structure, the body temperature cannot be accurately measured until the metal housing 02 and the guide piece 105 reach a certain temperature near the body temperature.

■How far is the tip of the guide piece 105 into the external ear canal 11?
I don't understand why it is inserted at 0. Therefore, if the guide piece 105 is not fully inserted, a gap will be created between the external ear canal 110 and the guide piece 105, making it impossible to perform accurate measurements.

(2) Furthermore, even if the operator inserts the guide piece 105 into the external ear canal 110, the subject may push the guide piece 105.

In this case, accurate measurements cannot be made,
Moreover, since the guide piece 105 does not have elasticity, it may damage the external ear canal 110.

■After the measurement is completed, the buzzer sounds and the sensor unit 1
] 5. However, when measuring in a noisy place, the above buzzer sound cannot be heard, and when measuring by yourself (when no operator is present). Since the LED of the sensor part is not visible,
Measurement completion and measurement results cannot be confirmed.

The present invention has been made in view of the current situation, and it is an object of the present invention to provide a temperature measuring device that can eliminate the above-mentioned drawbacks.

In order to achieve the above object, the present invention includes an infrared detection sensor that detects the amount of infrared rays from the eardrum, and the infrared detection sensor is fixed, and the infrared detection sensor is fixed. A sensor section having a guide pipe having a waveguide for introducing infrared rays, and a cylindrical guide piece that covers the guide pipe through a heat conduction suppressing space and is arranged coaxially with the guide pipe. Claim 1 characterized by comprising:
In the temperature measuring device having the structure described above, the distance from the tip of the guide piece to the tip of the waveguide is 11, and the distance from the tip of the guide piece to the infrared incident surface of the infrared detection sensor is ! 2. The temperature measuring device having the structure according to claim 1, wherein the value of the distance ffi, L is set so that L#z is within the range of 0.3 to 0.6. , where the area of the infrared incident surface of the sensor is S, and the opening area of the tip of the guide piece is S2, the range of S2/Sl<20 is set, and the infrared detection sensor is Distance to infrared incident surface is 10 to 16 mm
It is characterized by being set so that.

an infrared detection sensor that detects the amount of infrared rays from the eardrum; a guide pipe to which the infrared detection sensor is fixed and which introduces infrared rays to the infrared detection sensor; and a guide pipe that covers the guide pipe to suppress temperature changes in the guide pipe when measuring body temperature. A temperature measurement device including a sensor section having a cylindrical guide piece arranged as shown in FIG. It is characterized by

an infrared detection sensor that detects the amount of infrared rays from the eardrum; a guide pipe to which the infrared detection sensor is fixed and which introduces infrared rays to the infrared detection sensor; and a guide pipe that covers the guide pipe to suppress temperature changes in the guide pipe when measuring body temperature. A temperature measurement device including a sensor section having a cylindrical guide piece arranged as shown in FIG. and an external ear hole insertion part which are elastically connected to each other.

an infrared detection sensor that detects the amount of infrared rays from the eardrum; a guide pipe to which the infrared detection sensor is fixed and which introduces infrared rays to the infrared detection sensor; and a guide pipe that covers the guide pipe to suppress temperature changes in the guide pipe when measuring body temperature. A cylindrical guide piece arranged like this, a switch that is pressed when measuring body temperature, and a speaker that emits a sound when body temperature measurement is possible and announces the measurement result after body temperature measurement is completed. , a control unit that outputs an audio ringing signal to the speaker when the switch is pressed, performs calculation based on the signal from the infrared detection sensor, and outputs a speaker drive command signal to the speaker based on the calculation result; It is characterized by having the following.

- If the cylindrical guide piece is provided to cover the guide pipe through the heat conduction suppressing space as in the first invention, when the guide piece is inserted into the external ear canal during body temperature measurement, Since the temperature of the external ear canal can be suppressed from being transmitted to the waveguide, the amount of infrared rays radiated from the inner wall of the waveguide does not change. Therefore, since there is no need to warm up the guide pipe or guide piece before measurement, it is possible to measure body temperature more accurately from the beginning. Furthermore, since a heater is not required, it is possible to downsize the device.

Moreover, according to the second invention and the third invention, more accurate measurement is possible.

If the main body is covered with the cover made of an elastic member as in the fourth invention, there will be no gap between the external ear canal and the guide piece (cover), so body temperature can be measured accurately. Furthermore, even if the guide bead is inserted deep into the external ear canal, damage to the external ear canal and eardrum can be prevented.

As in the fifth invention, if the outer ear hole insertion part that covers the base part is attached to the base part via an elastic member, after the outer ear hole insertion part comes into contact with the outer ear hole, the operator or the person to be measured can move deeper into the body. Even if an attempt is made to insert the external ear canal insertion part, the external ear canal insertion part will not be inserted any further into the external ear canal. Therefore, damage to the external ear canal and eardrum can be reliably prevented.

As in the fifth invention, if a sound is emitted when the body temperature can be measured, it becomes possible to accurately measure the body temperature. This is because the guide piece can be set at the part where the loudest sound can be heard (the part where the tip of the guide piece faces substantially straight toward the eardrum).

Furthermore, since the measurement result is announced after the body temperature measurement is completed, the user can be sure of the completion of the measurement and the measurement result.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 9. Fig. 1 is a perspective view showing the overall configuration of the temperature measuring device, Fig. 2 is an enlarged perspective view of the sensor section, Fig. 3 is an exploded perspective view of the sensor section, Fig. 4 is a partially enlarged sectional view of the sensor section, and Fig. 5 The figure is a perspective view of the upper case, Figure 6 is an explanatory diagram when the sensor part is inserted into the external ear canal, and Figures 7 to 9 are j2+
It is a graph showing the relationship between the value of /e z and the amount of infrared rays incident on the thermopile, which is a factor of error.

As shown in FIG. 1, the temperature measuring device consists of a main body 1 and a
and a sensor section 2 connected by a cable 3. On the top surface of the main body 1, there is an LCD display section 4;
A measurement start button 5, a switch 6, a first display section 7 that displays that measurement preparations are completed, a second display section 8 that displays that measurement is completed, and the sensor section 2 is placed thereon. A sensor unit home position 9 formed in a concave shape is provided.

On the other hand, the sensor section 2 has a second case 10 and a lower case 11, as shown in FIG. Four engaging protrusions 20 are formed in the circumferential direction of the inner wall of the upper case 10, as shown in FIG. 5, while as shown in FIG. In the circumferential direction of the formed fitting wall portion 21, there is a positioning groove 2 formed with a notch.
2 is formed. And the above-mentioned engagement convex portion 20...
By fitting into the positioning groove 22, the upper case 10 and the lower case 11 are accurately positioned.

Further, the upper case 10 and the lower case 11 are fixed by screwing a screw 17, which is inserted through the lower surface of the lower case 11, into a protrusion 19 formed protrudingly at the center of the lower surface of the upper case 10.

A board 15 is arranged within the storage space formed by the upper case 10 and the lower case 11. Four grooves 15a... are formed on the outer periphery of this substrate 15, and these grooves 15a... are L-shaped provided on the inner periphery of the lower case 11 and have a stopper part 18a formed at the lower end. shaped rib 18
are fitted together. As a result, the substrate 15 and (substrate 15
The guide pipe 13) and the lower case 11, which will be described later, are fixed to the
Accurate positioning will be performed. Moreover, electronic components 23 . . . , which constitute a detection circuit and include ICs, resistors, etc., are mounted on the substrate 15, and the guide pipe 13 is fixed to the substrate 15 by screws 16. As shown in FIG. 4, the guide pipe 13 is composed of an inverted U-shaped base portion 13a and a waveguide 13b for introducing infrared rays into the thermopile 14. A thermopile 14 consisting of an infrared detection sensor that detects an amount of infrared rays and generates an electromotive force is provided inside the base portion 13a of the guide pipe 13. It is in thermal contact with the guide pipe 13.

Thereby, the structure is such that temperature changes in the thermopile 14 are reduced. In addition, the thermopile 14 has a lead L
4a/14a, and this glue F 14 a/1.
4a is soldered on the back surface of the board 15.

Further, the upper case 1 in the guide pipe 13
The portion protruding from the upper case 1 is covered by a guide piece 12 consisting of a base portion 12a and an insertion portion 12b for insertion into the outer ear canal.
A flange portion 12d is formed near the lower end of the outer periphery to determine the fitting length.

Here, in Figure 4! The lengths of 1 to ff11 are set as follows.

■Distance between the tip of the waveguide 13b and the tip of the insertion section 12b = 13.0 mm 0.Distance between the tip of the insertion section 12b and the top surface of the thermopile 14 = 32.0 mm.

■Distance L+ between the tip of the waveguide 13b and the top surface of the thermopile 14 = 19. 0mm.

(2) Distance 14 between the tip of the insertion portion 12b and the stepped surface of the base portion 12a = 24.0 mm.

■Distance ρ between the tip of the insertion portion 12b and the top surface of the upper case 10
5=40.0mm.

■Inner diameter of insertion portion 12b is 1! b=8. 0mm0■ Inner diameter of waveguide 13b 1-7=3. 7mm.

■Outer diameter ff18 of base portion 13a = 16.0 mm.

(2) Inner diameter of base portion 12a j2q-18.0 mm.

[Phase] Outer diameter fi+o of base portion 12a=22.　0mm.

■Distance f between the tip of the waveguide 13b and the top surface of the base portion 12a
f1z=13. 0mm0 Next, when measuring the body temperature using the temperature measuring device, it is performed as follows.

First, after setting the sensor section 2 on the sensor section home position 9 of the main body 1, the switch 6 is turned on. Next, after the second display section 8 indicating the completion of measurement preparation lights up, the insertion section 12b of the guide piece 12 is inserted into the external ear canal 26, as shown in FIG. Then, infrared rays emitted from the eardrum 27 reach the thermopile 14 via the waveguide 13b. In this thermopile 14,
An electromotive force is generated depending on the amount of incident infrared rays, and a detection circuit on the substrate 15 performs predetermined processing based on this output signal. Thereafter, the body temperature is displayed on the display section 4 based on the signal from the detection circuit.

Incidentally, since the engaging protrusions 20 of the upper case 10 fit into the positioning grooves 22 of the lower case 11, the upper case 10 and the lower case 11 are accurately positioned. Therefore, the guide piece 12 fixed in the hole 24 of the upper case 10 and the lower case 11 are accurately positioned. On the other hand, the four grooves 15a formed on the outer periphery of the substrate 15 are fitted with the square-shaped ribs 18 provided on the inner periphery of the lower case 11, so that the substrate 5 and the lower case 11 is accurately positioned. Therefore, the guide pipe 13 fixed to the base plate 15 with the screw 16 and the lower case 11 are accurately positioned. For these reasons, the guide piece 12 and guide pipe 13 (waveguide 13
(b) are accurately positioned, and as shown in FIG. 4, it becomes possible to arrange the two coaxially without making them contact each other.

In this way, in the temperature measuring device of the present invention, the guide pipe 13
The waveguide 13b and the guide piece 12 do not come into contact with each other (they can be positioned).
It is possible to suppress conduction of heat from the guide piece 12 to b. Therefore, the sensor section 2 can be connected to the external ear canal 2.
Even when inserted into the waveguide 13b, the amount of infrared radiation emitted from the inner wall of the waveguide 13b does not change. Therefore, the amount of infrared rays incident on the thermopile 14 as an error factor is reduced, making it possible to accurately measure body temperature.

[Experiment I] In the temperature measuring device having the above structure, the tip opening area of the waveguide of the guide pipe 13], 3b is (3,7/2)2π
The opening area at the tip of the insertion portion 12b of the guide piece 12 is (8,0/2)2π.

In a temperature measuring device having such an area ratio of both openings, the above 2. By changing the length of , we can change the ratio expressed by ρ/p,2, and
The changes in the amount of infrared rays incident on 4 were investigated, and the results are shown in FIG. Note that A in the figure indicates the amount of radiated infrared rays incident on the thermopile 4 from the inner wall of the guide piece 12, and B in the figure indicates the amount of radiated infrared rays incident on the thermopile 14 from the inner wall of the waveguide 13b.
It represents the amount of radiated infrared rays incident on.

As shown in FIG. 7, when the value of L/ρ2 is -0 (when the tip of the waveguide 13b is at the same position as the tip of the guide piece 12), the value of A is O. is recognized. This is because the infrared radiation emitted from the inner wall of the guide piece 12 is blocked by the waveguide 13b and does not enter the thermomobile 14. However, in the above case, it is recognized that the value of B is large. This is the waveguide 13b
Since the tip is too close to the wall surface of the external ear canal 26, the temperature of the waveguide 13b increases, and the amount of infrared radiation radiated from the inner wall of the waveguide 13b increases accordingly. This is because the amount of infrared rays radiated from the inner wall of the waveguide 13b is incident on the thermomobile 14. In this way, as the value of L #22 approaches 0, the amount of infrared radiation incident from the inner wall of the guide piece 12 becomes smaller, but the amount of infrared radiation incident from the inner wall of the waveguide 13b increases.

On the other hand, when the value of j2+/ff12 is -1 (when there is no waveguide 13b of the guide pipe 13), there is no influence from the inner wall of the waveguide 13b, so the value of B becomes 0. However, when the infrared radiation emitted from the inner wall of the guide piece 12 enters the thermomobile 14, there is nothing to block it. Therefore, the value of A becomes large and the thermomobile 1
The output of 4 will change. Like this pl/p2
As the value approaches 1, the amount of infrared radiation incident from the inner wall of the waveguide 13b becomes smaller, but the amount of infrared radiation incident from the inner wall of the guide piece 12 increases.

Therefore, as is clear from FIG. 7, ff, /I! .

Waveguide 13 so that the value of 2 is between 0.3 and 0.5.
The length of b! It is recognized that when 1 is set, the sum of the amount of incident infrared rays from the inner wall of the guide piece 12 and the amount of incident infrared rays from the inner wall of the waveguide 13b becomes small.

Therefore, 11/! It is desirable to set the length il of the waveguide 13b so that the value of 2 is between 0.3 and 0.5.

[Experiment ■] When the area ratio of the opening between the tip of the waveguide 13b and the tip of the guide piece 12 is changed, the above 11/I! , 2 also change. Therefore, what happens when the above area ratio is changed? l/! The optimal value of 2 was determined.

At this time, the outer diameter of the guide piece 12 inserted into the outer ear canal 26 cannot exceed 10 mm. therefore,
Experiments were conducted with the outer diameter of the guide piece 12 constant at 10 mm (inner diameter 8 mm) and the inner diameter of the waveguide 13b increased, and the results are shown in FIG.

As is clear from FIG. 8, the amount of incident infrared rays from the inner wall of the guide piece 12 and the inner wall of the waveguide 13b both increase, but the influence from the inner wall of the guide piece 12 is greater, so the optimum value of j21/j22 is found to be smaller than in the case of the above experiment (2). In addition, the guide pipe 13
Similar results can be obtained when the diameter of the guide piece 12 is made smaller while leaving the inner diameter of the guide piece 12 unchanged (inner diameter 3.7 mm).

On the other hand, the inner diameter of the guide piece 12 is maximized, and the waveguide 13
When the inner diameter of b is reduced, as shown in FIG. 7, the amount of infrared rays incident on the inner wall of the guide piece 12 and the inner wall of the waveguide 13b both decrease, but the amount of infrared rays incident on the eardrum 27 also decreases, so that the relative The proportion of error factors increases. Furthermore, it is recognized that the optimum value of l/p-2 becomes larger than in the case of the above experiment (2) because the influence from the inner wall of the waveguide 13b increases.

Example of Power I Interaction - A second embodiment of the present invention will be described below with reference to FIGS. 10 and 11. In the present second embodiment and the following third to fifth embodiments, only the parts that are different from the first embodiment will be explained.

As shown in FIG. 10, the structure is substantially the same as that of the first embodiment, except that the guide pipe 13 is not provided with a waveguide. In addition, the diameter P1 of the thermopile 14. is 3.7mm
Therefore, the area A of the infrared incident surface of the thermopile 14 is (
3,7/2)2π, and the insertion part 1 of the guide piece 12
Since the diameter .degree. C. 6 of 2b is the same as that of the first embodiment, the opening area thereof is configured to be the same as that of the first embodiment.

〔experiment〕

S=- Infrared incident surface of mobile 14 and guide piece 12
We set the area of the opening of The results are shown in FIG.

From FIG. 11, it can be seen that the distance t2+□ is preferably in the range of 10 to 16 mm. This is because if the distance ρ1° is less than 10 degrees, the thermopile 14 will reach close to the tip of the guide piece 12, so the thermopile 14 will come too close to the external ear canal 26. Therefore, the temperature of the thermopile 14 increases due to body temperature, and the output of the thermopile 14 changes accordingly. on the other hand,
distance! , 2 exceeds 16 mm, the tip of the guide piece 12 is warmed, and the amount of infrared radiation from the inner wall of the guide piece 12 increases. This is because a large amount of infrared rays enters the thermopile 14 from the inner wall of the guide piece 12, and the output of the thermopile 14 changes.

Hence the distance! 1□ is preferably within the above range.

In the above embodiment, the ratio of the opening area B of the tip portion to the area A of the infrared incident surface, that is, B/Aζ4°7,
It has been experimentally confirmed that if /A<20, the distance is 1□-10~b.

J] jl A third embodiment of the present invention will be described below based on FIG. 12.

The guide piece 12 is composed of a main body part 12c made of resin whose inner wall side is nickel-plated, and a cover part 12d made of urethane and covering the main body part 12c.

With this configuration, since the elastic cover portion 12d is in contact with the outer ear canal 26, there is no gap between the guide piece 12 and the outer ear canal 26, and body temperature can be measured accurately. Furthermore, since the cover portion 12d has elasticity, it will not damage the external ear canal 26 or the eardrum 27.

Note that the material of the cover portion 12d is not limited to urethane, and any material may be used as long as it has elasticity.

A fourth embodiment of the present invention will be described below with reference to FIGS. 13 to 19.

The guide piece 12 is divided into a base portion 31 that is fitted and fixed to the upper case 10 and an insertion portion 32 that is arranged to cover the base portion 31. The base portion 31 is the first
As shown in Fig. 6 and Figs. 18 (a) to (c), it has a cylindrical shape, and has a crocodile portion 3 in the circumferential direction on its outer peripheral surface.
3 is formed. Furthermore, a long groove 35 extending in the vertical direction is formed above the flange portion 33, and furthermore, the base portion 31
A cylindrical rib 34 extending upward is formed on the inner periphery. This rib 34 is provided to prevent the spring 37 that urges the insertion portion 32 upward from shaking.

On the other hand, as shown in FIG. 14, the insertion portion 32 has a cylindrical shape with a larger diameter at the bottom, and the inner diameter of the larger diameter portion is slightly larger than the outer diameter of the base portion 31. It is designed to be large. Furthermore, inside the insertion section 32, a 15th
As shown in the figure and FIGS. 17(a) to 17(c), a rib 36 extending downward and having the same diameter as the rib 34 is formed.

This rib 36 and the rib 34 can reliably prevent the spring 37 from shaking.

Further, a pair of two-piece notches 39 are formed at the lower end of the large diameter portion, and thereby an elastic portion 40 is formed between the notches 39. A cylindrical convex portion 38 with a rounded tip is formed inside the elastic portion 40, and this convex portion 38 is loosely fitted into the long groove 35 to fix the insertion portion 32 to the base portion 31. becomes possible.

Here, when measuring body temperature using the temperature measuring device having the above structure, as shown in FIG. 19(a), the guide piece 12
Insert the insertion portion 32 into the external ear canal 26. As shown in FIG. 3B, when the tip of the insertion portion 32 enters the outer ear canal 26 to a certain extent, the outer ear canal 26 and the insertion portion 32
Since the frictional force between the insertion portion 32 and the insertion portion 32 is greater than the biasing force of the spring 37, even if the insertion portion 32 is pressed twice more, the spring 37 will only be compressed and the insertion portion 32 will not enter the external ear canal 26. Therefore, the external ear canal 26 will not be damaged.

Note that if the biasing force of the spring 37 is too large, the insertion portion 3
Even if the tip of the ear canal 26 enters the outer ear canal 26 to some extent, it will not shrink, so it is necessary to set an appropriate biasing force. Further, it is desirable to change the biasing force of the spring 37 depending on the shape of the external ear canal 26, such as for infants and adults.

1st yJt Example - A fifth embodiment of the present invention will be described below based on FIGS. 20 to 22.

As shown in Fig. 21, the temperature measuring device has 5 ■ constant voltage power supply 6
5, a sensor sensing section 45, a signal processing section 46, and a control display section 47.

The sensor sensing section 45 includes the thermopile 14 and the diode 48, and the thermopile 14 and the diode '48.
It is composed of amplifiers 49 and 50 that amplify the output of the. The diode 48 measures the temperature of the thermomobile 14 by utilizing the temperature dependence of its forward voltage.

Furthermore, the thermopile 14 and the diode 48 have a 2.5
(2) A reference voltage is provided, and these output voltages are used as a charging voltage for an integrating circuit 55, which will be described later.

The signal processing section 46 has a power source 5 of 2,4 used as a discharge voltage for both the amplifiers 49 and 50 and the integrating circuit 55.
1, an integrating circuit 55, and a comparator 56 to which a 2.5cm reference voltage is applied.

The control display section 47 has a microcombination cord 57 connected to the comparator 56, and the microcomputer 57 includes a key input section 58 consisting of the measurement start button 5, etc., an LCD display section 4, first display section 7,
A second display section 8, an EEPROM 59, and a speaker 60 containing a drive source are connected.

As shown in FIG. 20, the speaker 60 is provided on the front surface of the substrate 5, and the leads are soldered to the back surface of the substrate 15. The sound emitted from the speaker 60 passes through the space formed between the guide piece 12 and the guide pipe 13 and is output from the tip of the guide piece 12.

FIG. 22 is a flowchart showing the operation of the temperature measuring device performed by the microcomputer 57.

First, when the switch 6 is turned on, the sensor section 2
It is determined whether or not the sensor unit is set at the home position 9 (Sl). If the sensor section 2 is not set at position 9, a call is made to ``Please return the sensor section to the main body'' (S2). On the other hand, if the sensor unit 2 is set at position 9, the first display unit 7 will light up to indicate that measurement preparation is complete (S
3). Next, it is determined whether the operator has taken out the sensor section 2 from the main body 1 (S4), and if the answer is affirmative, a setting alarm sound is sounded from the speaker 60 (S5). After the operator inserts the sensor section 2 in which the alarm sound is being sounded into the external ear canal 26 of the subject, the operator does not move the sensor section 2 in order to change the insertion angle of the sensor section 2. At this time, the person to be measured listens to the setting alarm sound and instructs the operator when this sound reaches its maximum level. The operator sets the sensor section 2 at this location. In this way, the reason why the sensor unit 2 is placed at the location where the setting alarm sound is maximum is because in such a situation, the tip of the sensor unit 2 is almost directly facing the eardrum. This is because it is in a state where it is accurately installed in the external ear canal 26. Next, as shown in step 7, when the measurement start button 5 is pressed, the first display section 7 turns off and the setting alarm sound stops (step S8).
), and then a body temperature measurement sequence is started (S9). In this body temperature measurement sequence, the output voltage from the thermopile 14 is corrected in consideration of the output voltage of the diode 48, and then this corrected voltage is compared with a comparison voltage of 2°5.
Furthermore, calculation is performed within the microcomputer 57 based on this comparison value. If the measurement start button 5 is not turned on 10 seconds after the setting alarm starts sounding, return to steps S1 and 2 (S6) and receive the message ``Please return the sensor unit to the main body.'' is carried out, and measurement becomes impossible.

The reason why measurement becomes impossible after 10 seconds has elapsed is because if the setting time of the sensor section 2 is too long, the temperature of the sensor section 2 will change greatly due to body temperature, making it impossible to accurately measure the body temperature. Depends on the reason. When the body temperature measurement is completed, the second display section 8 indicates that the measurement is complete.
lights up, and the body temperature is displayed on the LCD display section 4 (
SIO), and then from speaker 60, ``Measurement has ended.'' 0° C." is made (Sll). Thereafter, the operator returns the sensor unit 2 to the sensor unit home position 9, and the measurement sequence ends.

As described above, according to the present invention, it is possible to measure body temperature more accurately than before, and it is also possible to downsize the device.

In addition, it is possible to reliably prevent damage to the external ear canal and eardrum, and it is also possible to reliably know the end of the measurement and the measurement result.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the overall configuration of the temperature measuring device, Fig. 2 is an enlarged perspective view of the sensor section according to the first embodiment, Fig. 3 is an exploded perspective view of the sensor section, and Fig. 4 is a portion of the sensor section. Enlarged cross-sectional view,
Figure 5 is a perspective view of the upper case, Figure 6 is an explanatory diagram when the sensor section is inserted into the external ear canal, and Figures 7 to 9 are xI
A graph showing the relationship between the values of /p and z and the amount of infrared radiation incident on the thermopile, which is a factor of error. Figure 10 is a partially enlarged cross-sectional view of the sensor section according to the second embodiment. Figure 11 is the output of fi+ and the thermopile. A graph showing the relationship with the fluctuation rate, FIG. 12 is a partially enlarged sectional view of the sensor section according to the third embodiment, and FIG.
The figures are an exploded perspective view of the sensor section according to the fourth embodiment, FIG. 14 is a partially enlarged sectional view of the sensor section, FIG. 15 is a perspective view of the insertion section, FIG. 16 is a perspective view of the base section, and FIG. 17 (a) - (C
18) are views showing the insertion section, FIG. 18(a) is a plan view, FIG. 18(b) is a front view, FIG. 18(c) is a bottom view, and FIG.
) to (c) are views showing the base part, in which figure (a) is a plan view, figure (b) is a front view, figure (c) is a bottom view, and figures 19 (a) and (b). ) is an explanatory diagram when the sensor section is inserted into the external ear canal, FIG. 20 is a partially enlarged sectional view of the sensor section according to the fifth embodiment, FIG. 21 is a block diagram of the temperature measuring device, and FIG. 22 is a micro convenience store. 23 is a sectional view of the conventional temperature measuring device, FIG. 24 is an exploded perspective view, FIG. 25 is a plan view of the guide piece, and FIG. 26 is a diagram showing the temperature measuring device. It is an explanatory view when body temperature is measured using the device. 5...Measurement start button, 12...Guide piece, 1
2c... Main body part, 12d... Cover part, 13...
Guide pipe, 14... Thermopile, 27... Eardrum, 31... Base part, 32... Insertion part, 57...
Microcomputer, 60...speaker. Patent applicant: Sanyo Electric Co., Ltd.

Claims (6)

[Claims] (1) An infrared detection sensor that detects the amount of infrared rays from the eardrum; a guide pipe to which the infrared detection sensor is fixed and which has a waveguide for introducing infrared rays to the infrared detection sensor; and a heat conduction suppression space. A temperature measuring device comprising: a cylindrical guide piece that covers the guide pipe through the guide piece and is arranged coaxially with the guide pipe; (2) The temperature measuring device having the structure according to claim 1, wherein the distance from the tip of the guide piece to the tip of the waveguide is l_1.
If the distance from the tip of the guide piece to the infrared incident surface of the infrared detection sensor is l_2, then l_1/l
The distance l_1 is within the range of _2=0.3 to 0.6.
, l_2 values are set. (3) In the temperature measuring device having the structure according to claim 1, when the area of the infrared incident surface of the sensor is S_1 and the opening area of the tip of the guide piece is S_2, S_2/
A temperature measuring device characterized in that S_1<20 and the distance from the tip of the guide piece to the infrared incident surface of the infrared detection sensor is set to be 10 to 16 mm. (4) An infrared detection sensor that detects the amount of infrared rays from the eardrum, a guide pipe to which the infrared detection sensor is fixed and which introduces infrared rays to the infrared detection sensor, and a guide to suppress temperature changes in the guide pipe when measuring body temperature. A temperature measuring device including a sensor section having a cylindrical guide piece arranged to cover a pipe, the guide piece comprising a main body section and a cover section made of an elastic member and covering the main body section. A temperature measuring device characterized by: (5) An infrared detection sensor that detects the amount of infrared rays from the eardrum, a guide pipe to which the infrared detection sensor is fixed and which introduces infrared rays to the infrared detection sensor, and a guide to suppress temperature changes in the guide pipe when measuring body temperature. A temperature measurement device including a sensor section having a cylindrical guide piece disposed to cover a pipe, the guide piece having a base section, and an elastic body disposed to cover the base section. 1. A temperature measuring device comprising: an external ear hole insertion portion elastically connected via a member. (6) an infrared detection sensor that detects the amount of infrared rays from the eardrum; a guide pipe to which the infrared detection sensor is fixed and which introduces infrared rays to the infrared detection sensor; and a guide to suppress temperature changes in the guide pipe when measuring body temperature. A cylindrical guide piece placed to cover the pipe, a switch that is pressed when measuring body temperature, a sound when body temperature measurement is possible, and an announcement of the measurement result after body temperature measurement is completed. a speaker, which outputs an audio ringing signal to the speaker when the switch is pressed, calculates based on the signal from the infrared detection sensor, and outputs a speaker drive command signal to the speaker based on the result of the calculation; A temperature measuring device comprising: a control section;