JP2015160090A - Biological information detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological information detector which measures information of the living body by a stable pressing force.SOLUTION: A biological information detector 1 includes: a housing 10 which has at least a bottom surface to be a first surface and an upper surface to be a second surface facing the first surface; a detection part 20 which is provided for the bottom surface and detects an amount of reflected light of a measured finger, a finger to be measured; and a support part 30 which is provided for the upper surface and with which the measured finger supporting the housing is in contact. The detection part 20 is arranged nearer a right end part 113 of the housing than a center of gravity 53 of the housing. The support part 30 is arranged nearer the right end part 113 than the center of gravity 53, and a distance from the detection part 20 to the center of gravity 53 differs from a distance from the support part 30 to the center of gravity 53.

Description

  The present invention relates to a biological information detection apparatus that detects biological information.

  Conventionally, a pulse wave detection device that detects a pulse wave is known as an example of a biological information detection device that detects biological information. For example, in the pulse wave detection device described in Patent Document 1, a pulse wave detection unit that detects a pulse wave from a finger is provided in the main body. A movable part on which the fingertip side of the fingertip is placed is attached to the pulse wave detection unit so as to be movable away from the fingertip. The movable part is provided with a pulse wave sensor, and the main body is provided with a spring for pressing the movable part toward the finger pad side. When the fingertip is inserted into the pulse wave detector and the finger pad side is placed on the movable part, the movable part is pressed against the finger pad by the spring. A pulse wave sensor is a pair of a light emitting element and a light receiving element. Light from the light emitting element is applied to the fingertip, and reflected light from the fingertip is received by the light receiving element, and a pulse wave is measured based on the amount of light received. Is done.

Japanese Patent Laid-Open No. 10-43150

  However, in the configuration described in the conventional pulse wave detection device, the pulse wave sensor is pressed against the finger pad side of the fingertip by the pressing force of the spring, so that the pressing force of the fingertip against the pulse wave sensor changes depending on the thickness of the fingertip. . In addition, the spring has an aged characteristic change. Therefore, it is difficult to contact the pulse wave sensor and the fingertip with a stable pressing force, and the pulse wave cannot be measured stably. The conventional pulse wave detection device has a problem that there is no mechanism for applying a constant pressing force, and the fingertip cannot be stably pressed by the pulse wave sensor.

  An object of the present invention is to provide a biological information detection apparatus that measures biological information with a stable pressing force.

  The biological information detection apparatus according to the present invention includes a housing having at least a first surface and a second surface facing the first surface, and a measurement finger that is provided on the first surface and is a finger to be measured. A detection unit that detects the amount of reflected light; and a support unit that is provided on the second surface and contacts a support finger that supports the housing. It is arranged on one end side close to a predetermined end, the support part is arranged on the one end side from the center of gravity, and the distance from the detection part to the center of gravity and the distance from the support part to the center of gravity And are different.

  In the biological information detection apparatus, the one end side closer to the predetermined end of the casing than the center of gravity of the casing is disposed, and the support section is disposed closer to the one end than the center of gravity, and the distance from the detection unit to the center of gravity. Since the distance from the support part to the center of gravity is different, even if the detection part is on the lower side of the case or the detection part is on the upper side of the case, the force that the case is inclined by gravity and the support part are The force pressed by the supporting finger is balanced, and the detection unit can be pressed against the measuring finger by the weight of the housing. Accordingly, the pressing force of the detection unit on the measuring finger is constant.

  The detection unit is disposed on the first surface that is a lower surface with respect to the direction of gravity of the housing, and the support unit is disposed on the second surface that is an upper surface with respect to the direction of gravity of the housing. The support part may be arranged closer to the one end than the detection part. In this case, the detection unit is disposed on the lower surface side, and the detection unit can be pressed against the measurement finger by the weight of the housing. Accordingly, the pressing force of the detection unit on the measuring finger is constant.

  The detection unit is disposed on the second surface that is an upper surface with respect to the direction of gravity of the casing, and the support unit is disposed on the first surface that is a lower surface with respect to the direction of gravity of the casing. And the said detection part may be arrange | positioned at the said one end part side from the said support part. In this case, the detection unit is arranged on the upper surface side, and the detection unit can be pressed against the measurement finger by a force that the case is inclined and the detection unit is lifted by the weight of the case. Accordingly, the pressing force of the detection unit on the measuring finger is constant.

  The detection unit includes a light receiving sensor that receives reflected light of the measuring finger, and the detection unit is a concave portion formed in a concave shape with respect to the first surface, and the light receiving sensor is disposed in the concave portion. May be arranged. In this case, the measurement finger enters the recess, and the measurement finger is reliably in contact with the light receiving sensor. Since the light receiving sensor is provided in the recess, it is possible to reduce the extraneous light from hitting the light receiving sensor.

  The detection unit may include a light emitting element that emits light. In this case, the light emitted from the light emitting element is received by the light receiving sensor, and the biological information is detected.

  You may provide the display part which displays the detection result detected by the said detection part on the upper surface which becomes the upper side with respect to the direction of the gravity of the said housing | casing. In this case, the detection result can be displayed immediately by the display unit. Further, since the display unit is provided on the upper surface side, the user can easily see the display unit.

  A horizontal detection unit that detects the horizontal state of the casing may be provided in the casing. In this case, the casing can be held horizontally based on the detection result of the horizontal detection unit, and the pressing force of the detection unit on the measuring finger can be made constant.

It is a perspective view of living body information detecting device 1 of a first embodiment. It is a bottom view of living body information detecting device 1 of a first embodiment. It is arrow direction sectional drawing of the biological information detection apparatus 1 in the XX line of FIG. 2 is a block diagram showing an electrical configuration of the biological information detection apparatus 1. FIG. It is a front view which shows the use condition of the biometric information detection apparatus 1 of 1st embodiment. It is sectional drawing of the biological information detection apparatus 2 of 2nd embodiment. It is a bottom view of living body information detecting device 2 of a second embodiment. It is a front view which shows the use condition of the biometric information detection apparatus 2 of 2nd embodiment. It is a top view of the biological information detection apparatus 3 of 3rd embodiment. It is a perspective view which shows the use condition of the biometric information detection apparatus 3 of 3rd embodiment. It is a perspective view of the level device 70. FIG.

<1. Structure of biological information detection apparatus 1>
A biological information detection apparatus 1 according to a first embodiment embodying the present invention will be described with reference to the drawings. The structure of the biological information detection apparatus 1 that detects the pulse wave of the fingertip as the biological information will be described with reference to FIGS. In the following description, the upper side, the lower side, the left diagonal front side, the right diagonal rear side, the right diagonal front side, and the left diagonal rear side of FIG. Side, right side, and left side. FIG. 1 is a perspective view showing the overall configuration of the biological information detection apparatus 1.

  As shown in FIG. 1, the biological information detection apparatus 1 has a housing 10. The housing 10 includes an upper housing 11 and a lower housing 12. The upper housing 11 and the lower housing 12 are fitted together to form the housing 10 of the biological information detecting device 1. The upper housing 11 has a rectangular upper surface 111 in plan view. The upper surface 111 of the upper housing 11 forms an upper surface that becomes the second surface of the biological information detecting device 1. The lower housing 12 has a rectangular bottom surface 112 in plan view. The bottom surface 112 forms a bottom surface that is the first surface of the biological information detecting device 1. The upper housing 11 and the lower housing 12 have a plate shape extending in the front / rear / left / right direction, and are connected to each other at the front / rear / left / right end portions. For this reason, the housing | casing 10 of the biometric information detection apparatus 1 has a rectangular parallelepiped external appearance long in the front-back, left-right direction.

  On the upper surface 111 of the upper housing 11, a display 34 for displaying a pulse wave detection result and other information is provided on the left end 114 side. The display 34 is composed of a liquid crystal display device as an example. Between the display 34 on the upper surface 111 and the right end portion 113, an operation unit 35 for receiving a user operation is provided. For example, the operation unit 35 includes a lightweight touch panel, a lightweight key switch, and the like.

  A support portion 30 that is recessed in a spherical shape is formed at the corner on the right end portion 113 side of the upper surface 111 of the upper housing 11. When the user supports the biological information detection apparatus 1, the user abuts a thumb 55 (see FIG. 5), which is an example of a support finger, on the support unit 30.

  FIG. 2 is a view of the bottom surface of the biological information detecting device 1 as viewed upward. FIG. 3 is a cross-sectional perspective view of the biological information detecting device 1 taken along line XX in FIG. 1 and viewed from the direction of the arrow in FIG. As shown in FIGS. 2 and 3, a detection unit 20 that is recessed in a spherical shape is formed at a substantially central portion in the left-right direction and the front-rear direction of the bottom surface 112 of the lower housing 12. A photosensor 22 is provided on the recessed ceiling portion of the detection unit 20. The photo sensor 22 includes a light emitting unit 222 and a light receiving unit 223. The light emitting unit 222 is, for example, an LED (Light Emitting Diode). The light receiving unit 223 is, for example, a photodiode. The light receiving unit 223 emits light 61 (see FIG. 4) from the light emitting unit 222, receives the reflected light 62 (see FIG. 4) reflected by the index finger 54 as a measurement finger that is a measurement target finger, and reflects the amount of reflected light. Is detected. The reflected light 62 includes at least light reflected by the capillaries of the index finger 54. An annular elastic member 224 is provided on the opening end side of the recess of the detection unit 20. The elastic member 224 is in close contact with the finger pad of the measuring finger and prevents a gap from being formed. As shown in FIG. 3, a battery 50 is provided between the detection unit 20 and the left end 114 in the lower housing 12. A circuit board 40 is provided between the detection unit 20 and the right end 113 in the lower housing 12. The circuit board 40 is provided with the electric circuit shown in FIG.

<2. Electrical Configuration of Biological Information Detection Device 1>
With reference to FIG. 4, the electrical configuration of the biological information detection apparatus 1 will be described. The biological information detection apparatus 1 includes a circuit board 40, a photo sensor 22, a display 34, an operation unit 35, and a battery 50. The circuit board 40 controls the biological information detection apparatus 1, and the display 34 displays the detection result. The operation unit 35 is operated by a user, and an instruction to a CPU 31 (described later) provided on the circuit board 40 is input. The operation unit 35 also includes a power switch (not shown) for turning the biological information detection apparatus 1 on and off. The battery 50 supplies power to the circuit board 40, the photosensor 22, the display 34, and the operation unit 35.

  The circuit board 40 is provided with a CPU 31, a ROM 32, a RAM 33, an acceleration sensor 39, a current / voltage conversion circuit 361, an amplification circuit 362, and an A / D conversion circuit unit 37. The ROM 32, RAM 33, acceleration sensor 39, display 34, and operation unit 35 are electrically connected to the CPU 31, respectively. The CPU 31 controls the biological information detection device 1. The ROM 32 stores a control program for the biological information detection apparatus 1 and the like. The RAM 33 temporarily stores various data.

  The display 34 displays an image based on the image signal output from the CPU 31. The operation unit 35 outputs a signal corresponding to the operation by the user to the CPU 31. The acceleration sensor 39 is a triaxial acceleration sensor as an example, and detects the horizontal state of the housing 10 of the biological information detection device 1. The CPU 31 detects the horizontal state of the housing 10 from the output of the acceleration sensor 39 and displays the horizontal state of the housing 10 on the display 34. The user can see the result displayed on the display 34 and can hold the housing 10 horizontally, and the pressing force of the detection unit 20 on the measuring finger can be made constant.

  In addition, the light emitting unit 222 of the photosensor 22 is electrically connected to the CPU 31. The current-voltage conversion circuit 361 is electrically connected to the light receiving unit 223 and the amplifier circuit 362 of the photosensor 22. The A / D conversion circuit unit 37 is electrically connected to the amplifier circuit 362 and the CPU 31. The light emitting unit 222 emits light based on a control signal from the CPU 31. The light 61 emitted from the light emitting unit 222 reaches the blood vessel of the index finger 54, which is an example of the inspection finger shown in FIG. A part of the light that reaches the blood vessel is absorbed by hemoglobin in the blood, and a part of the light is reflected or transmitted. The blood flow volume of the finger blood vessels changes according to the pulse. When the blood flow changes, the intensity of the reflected light 62 changes as the amount of hemoglobin changes. The light receiving unit 223 receives the reflected light 62. The current flowing through the light receiving unit 223 changes according to the received light intensity of the reflected light received by the light receiving unit 223.

  The current-voltage conversion circuit 361 outputs a change in current flowing through the light receiving unit 223 as a change in voltage. The amplifier circuit 362 amplifies the voltage output from the current-voltage conversion circuit 361. The A / D conversion circuit unit 37 converts the voltage output from the amplifier circuit 362 from an analog signal to a digital signal and outputs the converted signal to the CPU 31. The CPU 31 can detect the intensity of the light received by the light receiving unit 223 based on the digital signal output from the A / D conversion circuit unit 37. That is, since the intensity of the reflected light 62 received by the light receiving unit 223 changes according to the pulse wave, the CPU 31 can detect the pulse wave based on the digital signal output from the A / D conversion circuit unit 37. it can. The CPU 31 displays the detection result on the display 34. Since the detection result is immediately displayed on the display 34, the user can immediately recognize the detection result. In addition, since the display 34 is provided on the upper surface 111 side, the user can easily see the display unit.

<3. Weight distribution and action / effect of biological information detecting apparatus 1>
With reference to FIG.3 and FIG.5, the weight distribution and the usage method of the biometric information detection apparatus 1 are demonstrated. As shown in FIG. 3, a relatively heavy battery 50 is provided between the detection unit 20 and the left end 114 in the lower housing 12 of the biological information detection apparatus 1. A display 34 is provided on the upper housing 11 above the battery 50 so as to face the battery 50. On the other hand, a circuit board 40 is provided between the detection unit 20 and the right end 113 in the lower housing 12, and an operation unit 35 is provided on the upper surface 111 of the upper housing 11 facing the circuit board 40. It has been. In this case, the relatively heavy battery 50 and the display 34 are provided on the left end 114 side of the detection unit 20, and the relatively light circuit board 40 and the operation unit 35 are provided on the right end 113 side of the detection unit 20. Therefore, as shown in FIG. 5, the position of the center of gravity 53 of the housing of the biological information detection device 1 is between the detection unit 20 and the left end 114.

  When the user detects a pulse wave, as shown in FIG. 5, the user places the finger pad of the index finger 54, which is an example of the measurement finger to be measured, on the detection unit 20, and The tip of the finger pad 54 contacts the photo sensor 22. In addition, the user holds the casing 10 of the biological information detection device 1 by bringing a thumb 55 that is an example of a support finger into contact with the support unit 30. In this case, as shown in FIG. 5, the center of the contact portion between the photosensor 22 of the detection unit 20 and the tip of the index finger 54 that is the measurement finger becomes the action point 51. The fulcrum 52 is the center of the contact portion, which is the region where the thumb 55 is in contact. Further, the center of gravity 53 is a power point. Therefore, in the present embodiment, the detection unit 20 (the action point 51) is disposed on the right end 113 side from the center of gravity 53, and the support unit 30 is disposed on the right end 113 side from the center of gravity 53. The distance L1 from the (action point 51) to the center of gravity 53 is shorter than the distance L2 from the support portion 30 (fulcrum 52) to the center of gravity 53. Therefore, the housing 10 of the biological information detection apparatus 1 uses the detection unit 20 as the action point 51 and the left end portion 114 tends to be lowered in the direction of force F (downward) by the force F acting on the center of gravity 53. On the other hand, the casing 10 of the biological information detection apparatus 1 is kept horizontal by the force of the thumb 55 that is a support finger that presses the support portion 30 that is the fulcrum 52. Therefore, the detection unit 20 can be pressed against the index finger 54 that is a measurement finger by the weight of the housing 10 of the biological information detection apparatus 1. Since the gravity acting on the center of gravity 53 is constant, the pressing force to the index finger 54 that is the measurement finger of the detection unit 20 is constant. Accordingly, the pulse wave is accurately detected by the photosensor 22.

  In this state, when the user operates the operation unit 35 and instructs the CPU 31 to detect a pulse wave, the light emitting unit 222 of the detection unit 20 emits light as described above, and the pulse group of the index finger 54 is detected. The Since the pressing force on the index finger 54, which is an example of the measurement finger of the detection unit 20, is constant as described above, the pulse group can be accurately detected. Since the detection result is displayed on the display 34, the user can easily recognize it.

<4. Structure of biological information detection apparatus 2>
Next, with reference to FIG.6, FIG7 and FIG.8, the biological information detection apparatus 2 of 2nd embodiment of this invention is demonstrated. The biological information detection device 2 differs from the biological information detection device 1 only in the positions of the detection unit 20 and the support unit 30 and the structure of the support unit 30, and the other structures are the same. In the second embodiment, an example of the support finger is the index finger 54, and an example of the measurement finger is the thumb 55. Hereinafter, different parts will be described, and description of the structure of the same part will be omitted. As shown in FIGS. 6 and 7, in the biological information detection apparatus 2, the detection unit 20 is provided between the operation unit 35 and the right end 113 on the upper surface 111 of the upper housing 11. That is, the detection unit 20 is provided on the right end 113 side of the central portion of the upper surface 111 in the left-right direction. The structure of the detection unit 20 is the same as that of the biological information detection apparatus 1, and the direction of the opening of the detection unit 20 is upward. In addition, as shown in FIGS. 6 and 7, the support portion 30 is provided at the approximate center of the bottom surface 112 of the lower housing 12. The support part 30 is a mark part 60 made of an annular protrusion. The mark portion 60 is an annular protrusion at the center where the tip of the index finger 54 as a support finger is inserted.

<5. Action and Effect of Biological Information Detection Device 2>
When the user detects a pulse wave, the user inserts the finger pad of the tip of the thumb 55, which is an example of a measurement finger to be measured, into the detection unit 20 of the biological information detection device 2, and the thumb 55 The tip of the fingertip is brought into contact with the photosensor 22. In addition, the user holds the casing 10 of the biological information detection apparatus 1 by contacting the finger pad of the index finger 54, which is an example of a support finger, in the mark unit 60 of the support unit 30. In this case, as shown in FIG. 8, the center of the contact portion between the photo sensor 22 of the detection unit 20 and the finger pad of the thumb 55 serves as the action point 51, and the center of the contact portion between the support unit 30 and the index finger 54 corresponds to the center. It becomes a fulcrum 52. Further, the center of gravity 53 is a power point. Therefore, in the present embodiment, the detection unit 20 (the action point 51) is disposed on the right end 113 side from the center of gravity 53, and the support unit 30 is disposed on the right end 113 side from the center of gravity 53. The distance L3 from the (action point 51) to the center of gravity 53 is longer than the distance L4 from the support portion 30 (fulcrum 52) to the center of gravity 53. Therefore, in the case 10 of the biological information detection apparatus 1, the left end portion 114 acts in the direction of force F (downward) by the force F acting on the center of gravity 53 with the detection unit 20 as the action point 51. On the other hand, the housing 10 of the biological information detection apparatus 1 is kept horizontal by the force of the support finger that presses the support portion 30 that is the fulcrum 52. Therefore, the detection unit 20 can be pressed against the index finger 54 that is a measurement finger by the weight of the housing 10 of the biological information detection apparatus 1. Since the gravity acting on the center of gravity 53 is constant, the pressing force to the index finger 54 that is the measurement finger of the detection unit 20 is constant. Therefore, the pulse group can be detected accurately.

<6. Structure of biological information detection apparatus 3>
Next, with reference to FIG.9 and FIG.10, the biometric information detection apparatus 3 of 3rd embodiment of this invention is demonstrated. In the biological information detection device 3, the detection unit 20 is provided at the center of the bottom surface 112 of the lower housing 12, which is the same as the biological information detection device 1, and the biological information detection device 1 is that two support portions 30 are provided. And the other structures are the same. In the third embodiment, an example of the support finger is the index finger 54 and the middle finger 56, and an example of the measurement finger is the thumb 55. Hereinafter, different parts will be described, and description of the structure of the same part will be omitted. As shown in FIG. 9 and FIG. 10, the biological information detection apparatus 3 includes the upper housing 11 and the support portions 30, 30 between the operation unit 35 and the right end portion 113 on the upper surface 111 of the upper housing 11. Two are provided at predetermined intervals in the front-rear direction. Each of the support portions 30 is a mark portion 60 formed of an annular protrusion. The mark portion 60 is an annular protrusion having a size enough to allow the tip of the index finger 54 as a support finger to enter the center.

<7. Action and Effect of Biological Information Detection Device 3>
As shown in FIG. 10, when the user detects a pulse wave, the user inserts the finger pad of the tip of the thumb 55, which is an example of a measurement finger to be measured, into the detection unit 20, and The tip of the fingertip 55 is brought into contact with the photosensor 22. In addition, the user holds the casing 10 of the biological information detection apparatus 1 by bringing the index finger 54 and the middle finger 56, which are examples of support fingers, into contact with the mark portions 60 in the support portions 30. In this case, since the two support parts 30 are provided, in addition to the effect of the biological information detection device 1 of the first embodiment, the biological information detection device 3 is stably held.

  In the first to third embodiments, the upper surface 111 is an example of the “second surface” in the present invention. The bottom surface 112 is an example of the “first surface” in the present invention. The right end 113 is an example of the “predetermined end” or “one end” of the present invention. The display 34 is an example of the “display unit” in the present invention. The acceleration sensor 39 is an example of the “horizontal detection unit” in the present invention. The light receiving portion 223 of the photosensor 22 is an example of the “light receiving sensor” in the present invention. The light emitting unit 222 of the photosensor 22 is an example of the “light emitting element” in the present invention.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the horizontal detection unit is not limited to the acceleration sensor 39. For example, a known level 70 shown in FIG. 11 is provided at an arbitrary position on the upper surface 111 of the upper casing 11, and the user adjusts the inclination of the casing 10 so that the bubble 72 is at the center of the ring 71. Thus, the housing 10 may be kept horizontal. Further, the mark portion 60 is not limited to an annular shape, and may be a simple protrusion. The mark portion 60 may be formed integrally when the housing 10 is formed, or a seal or the like may be attached. That is, the mark part 60 may be a mark whose position can be specified by visual observation or finger touch. Further, the detection result of the pulse wave may be transmitted to another device via a communication unit provided on the circuit board 40 instead of being displayed on the display 34. Further, three or four support portions 30 may be provided.

  Note that the position of the center of gravity 53 may be shifted to the left end 114 side instead of the center of the housing 10 in the left-right direction. For example, the center of gravity 53 may be closer to the left end portion 114 than the center of the housing 10 in the left-right direction. Moreover, you may make it displace the position of the gravity center 53 by providing an adjustment mechanism. For example, the position of the battery 50 can move in the left-right direction of the housing 10. Further, a weight that can move in the left-right direction of the housing 10 is incorporated. Further, the position of the detection unit 20 may slide in the left-right direction of the housing 10. In this case, the position of the center of gravity 53 can be moved in the left-right direction of the housing 10, and the pressing force of the measurement finger on the detection unit 20 can be adjusted.

DESCRIPTION OF SYMBOLS 1 Living body information detection apparatus 2 Living body information detection apparatus 3 Living body information detection apparatus 10 Housing | casing 11 Upper housing | casing 12 Lower housing | casing 20 Detection part 22 Photosensor 30 Support part 34 Display 35 Operation part 39 Acceleration sensor 50 Battery 51 Working point 52 Supporting point 53 Center of gravity 54 Index finger 55 Thumb 56 Middle finger 60 Mark part 70 Level 111 Top surface 112 Bottom face 113 Right end part 114 Left end part 222 Light emitting part 223 Light receiving part 224 Elastic member

Claims (7)

A housing having at least a first surface and a second surface facing the first surface;
A detection unit that is provided on the first surface and detects a reflected light amount of a measurement finger that is a finger to be measured;
A support portion provided on the second surface, with which a support finger for supporting the housing abuts,
The detection unit is arranged on one end side closer to a predetermined end of the casing than the center of gravity of the casing,
The support portion is disposed closer to the one end than the center of gravity.
The living body information detecting apparatus, wherein a distance from the detection unit to the center of gravity is different from a distance from the support unit to the center of gravity. The detection unit is disposed on the first surface which is a lower surface with respect to the direction of gravity of the housing,
The support portion is disposed on the second surface which is an upper surface with respect to the direction of gravity of the housing,
The biological information detection apparatus according to claim 1, wherein the support part is disposed closer to the one end part than the detection part. The detection unit is disposed on the second surface which is an upper surface with respect to the direction of gravity of the housing,
The support portion is disposed on the first surface which is a lower surface with respect to the direction of gravity of the housing,
The biological information detection apparatus according to claim 1, wherein the detection unit is disposed closer to the one end than the support unit. The detection unit includes a light receiving sensor that receives reflected light of the measuring finger,
The detection unit is a recess formed in a concave shape with respect to the first surface,
The biological information detection apparatus according to claim 1, wherein the light receiving sensor is disposed in the recess.   The biological information detection apparatus according to claim 1, wherein the detection unit includes a light emitting element that emits light.   The living body according to any one of claims 1 to 5, wherein a display unit for displaying a detection result detected by the detection unit is provided on an upper surface of the housing which is on an upper side with respect to a direction of gravity. Information detection device. The biological information detection apparatus according to claim 1, wherein the casing includes a horizontal detection unit that detects a horizontal state of the casing.

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