Vital sign measuring device

Abstract

To provide a vital sign measurement device which enables a measured person to easily measure vital signs after a collision.SOLUTION: The vital sign measurement device comprises a sensor which is provided at a seat 1 having a seat surface 10 to place the thighs 110 and hips 120 of a measured person 100 thereon and a seat back 20 disposed along the back of the measured person, and measures vital signs in contact with a finger of the measured person. The sensor includes a side sensor 200 disposed under a side edge part of the seat surface.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vital sign measuring device that measures the vital signs of a subject seated on a seat.

Background Art

[0002] In vehicles such as automobiles, it has been proposed to detect the vital signs (biological information) of passengers such as drivers. As a technology related to measuring the biological information of vehicle passengers, for example, Patent Document 1 describes irradiating a passenger seated on the driver's seat with a detection wave such as an electromagnetic wave and sensing the difference from the reflected wave to detect vital signs such as respiration information and heartbeat information, and making the irradiation range follow the forward and backward movement of the driver's seat. Patent Document 2 describes measuring the brain waves, pulse, etc. of a driver using a contact type sensor provided on a wearable terminal or a steering wheel, etc., and determining whether the driver is in a state where driving is possible. Patent Document 3 describes providing a photoelectric pulse wave sensor that measures the pulse wave of a passenger using light, a piezoelectric pulse wave sensor that measures the pressure wave on the body surface of the passenger, an electromagnetic wave type pulse wave sensor that measures the pulse wave of the passenger using electromagnetic waves, etc. inside the seat of a vehicle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to grasp the condition of the occupant after a collision, measuring vital signs such as arterial oxygen saturation SpO2 and pulse rate is an effective means, for example. However, when measuring vital signs in a non-contact state using, for example, a camera, there is a concern that after a collision, the occupant may go out of the imaging angle of the camera or a foreign object may intervene between the camera and the occupant. The same problem occurs when measuring vital signs in a non-contact state using a detection wave such as an electromagnetic wave. On the other hand, it has also been proposed to incorporate a sensor for measuring vital signs in the seat sheet. In this case, however, there is a concern that accurate measurement of vital signs may not be possible due to the occupant's clothing. In this regard, if a sensor that directly contacts, for example, the occupant's finger is used, the measurement accuracy of vital sign measurement can be ensured. However, it is difficult for an occupant who has been injured or is in a panic state after a collision to extend their hand to the vital sign measurement sensor of their own will. In view of the above problems, an object of the present invention is to provide a vital sign measurement device that allows a subject to easily measure vital signs after a collision.

Means for Solving the Problems

[0005] In order to solve the above-described problems, a vital sign measurement device according to an aspect of the present invention is provided on a seat having a seat surface portion on which the thigh and buttocks of a subject are placed and a seat back portion arranged along the back of the subject, and has a sensor that measures vital signs in contact with the finger of the subject, wherein the sensor includes a side sensor disposed below a side edge portion of the seat surface portion. Note that the side sensor is arranged at a position reachable by the fingers of the subject when the upper body of the subject has fallen forward or is leaning against the seat back portion of the seat and the arm of the subject has dropped to the side of the seat surface. It is characterized by the above. According to this, even when the consciousness of the subject (typically an occupant of a vehicle) is drowsy and weak due to the impact of a collision or the like, and the arm is relaxed and hangs down limply on the side of the seat, the finger can easily reach the side sensor naturally, and the subject can easily measure vital signs after a collision.

[0006] In the present invention, the side sensors include a front side sensor and a rear side sensor that are spaced apart in the front-rear direction of the seat surface portion. Note that the front side sensor is arranged at a position reachable by the fingers of the subject when the upper body of the subject has fallen forward and the arm of the subject has dropped to the side of the seat surface. The rear side sensor is arranged at a position reachable by the fingers of the subject when the upper body of the subject is leaning against the seat back portion of the seat and the arm of the subject has dropped to the side of the seat surface. It can be configured. After a collision, when the occupant's consciousness is drowsy, the upper body of the occupant is in a state of falling forward or leaning against the seat back portion. According to the present invention, when the upper body of the subject being measured falls forward, since the arm hangs down to the side portion on the front side of the seat surface of the seat, the vital signs can be measured by the front side sensor. On the other hand, when the upper body of the subject being measured leans against the seat back, since the arm hangs down to the side portion on the rear side of the seat surface of the seat, the vital signs can be measured by the rear side sensor.

[0007] In the present invention, the rear side sensor When the upper body of the subject is leaning against the seat back portion, the position of the hand of the subject when the arm of the subject drops to the side of the seat surface is lower than when the upper body of the subject has fallen forward. It can be configured to be disposed at a lower position than the front side sensor. When the upper body of the subject being measured leans against the seat back, in contrast to the state where the upper body falls forward, the position of the hand when the arm hangs down is often lower. According to the present invention, according to the difference in the height of the hand corresponding to such a posture of the upper body, by arranging the front side sensor and the rear side sensor at different heights, the vital signs can be easily measured in each posture.

[0008] In the present invention, the sensor further includes a front sensor disposed below a region near the side end portion at the front edge of the seat surface portion. Note that the front sensor is arranged at a position reachable by the fingers of the subject when the upper body of the subject has fallen forward and the arm of the subject has dropped in front of the seat surface. It can be configured. Also, in order to solve the above-described problems, an invention according to another aspect of the present invention is a vital sign measuring device provided on a seat having a seat surface portion on which the thighs and buttocks of a subject are placed and a seat back portion arranged along the back of the subject, the device having a sensor that measures vital signs by contacting the fingers of the subject, the sensor including a front sensor disposed below a region near the side end portion at the front edge of the seat surface portion. Note that the front sensor is arranged at a position reachable by the fingers of the subject when the upper body of the subject has fallen forward and the arm of the subject has dropped in front of the seat surface. is characterized by. According to each of these inventions, when the upper body of the person to be measured falls forward and the arms hang down to the front side of the seat surface, the fingers can easily reach the front sensor, and the person to be measured can easily measure vital signs after a collision. Note that the sensor installation positions of each of the above-described inventions have been confirmed to function effectively even when the physique of the person to be measured changes, for example, in height from 165 cm to 190 cm (the fingers come near the sensor in a state where the arms hang down due to relaxation).

Advantages of the Invention

[0009] As described above, according to the present invention, it is possible to provide a vital sign measuring device that allows a person to be measured to easily measure vital signs after a collision.

Brief Description of the Drawings

[0010]

Figure 1

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Mode for Carrying Out the Invention

[0011] Hereinafter, an embodiment of a vital sign measuring device to which the present invention is applied will be described. The vital sign measuring device according to the embodiment is provided, for example, on a seat for the front seats (driver's seat, passenger seat) of an automobile such as a passenger car, and measures the vital signs of a passenger (subject to be measured) sitting on the seat after the occurrence of a collision accident.

[0012] FIG. 1 is a schematic external perspective view of a vehicle seat provided with the vital sign measuring device according to the embodiment, showing a state in which the upper body of the passenger is reclined against the seat back. The seat 1 has a seat surface portion 10, a seat back 20, a headrest 30, a seat trim 40, and the like. The seat 1 is attached to a vehicle body (not shown) with the passenger 100 facing the front side of the vehicle. The seat surface portion 10 is a portion on which the buttocks 110 and thighs 120 of the passenger 100 are placed. The seat surface portion 10 has a cushion placed on the seat frame F. The seat back 20 is a backrest-shaped portion arranged along the back of the upper body 130 of the passenger 100. The seat back 20 is formed to extend upward from the vicinity of the rear end portion of the seat surface portion 10. The headrest 30 is provided to protrude upward from the upper end portion of the seat back 20, and is a portion that supports the rear portion of the head 140 of the passenger 100.

[0013] The seat trim 40 is a cover-shaped member provided at the lower part of the seat surface portion 10 and covering a seat frame F provided inside the seat 1, a seat rail (not shown), a drive mechanism for changing the seat position, and the like. The seat frame F is a frame-shaped structural member provided at the lower part of the seat surface portion 10 and formed of, for example, a metal member having a closed cross section. The seat trim 40 has side surface portions 41, front surface portions 42, and the like. The side surface portion 41 is a surface portion formed by extending downward from the side edge portion of the seat surface portion 10. The side surface portion 41 is disposed facing the side of the vehicle. The front surface portion 42 is a surface portion formed by extending downward from a region near the side end portion at the front edge portion of the seat surface portion 10. The front surface portion is disposed facing the front side of the vehicle. A switch 43 for changing the seat position such as the front-rear position, up-down position, front-rear inclination of the seat surface portion 10, and inclination (reclining angle) of the seat back 20 of the occupant 100 is provided at the rear portion of the side surface portion 41.

[0014] The seat 1 is provided with a sensor for measuring the vital signs of the occupant 100, for example, after the occurrence of a collision accident. As the vital signs, for example, pulse, arterial oxygen saturation SpO2, etc. can be measured. The seat 1 has a rear side sensor 200, a front side sensor 300, a front sensor 400, and the like.

[0015] The rear side sensor 200 is provided at the rear portion of the side surface portion 41 of the seat trim 40. The rear side sensor 200 typically measures the vital signs of the occupant 100 when the upper body 130 of the occupant 100 leans against the seat back 20 and the arm 150 hangs down to the side of the seat surface portion 10 after the occurrence of a collision accident. The rear side sensor 200 has an opening 210, a lever 220, and the like. The opening 210 is the part where the finger 160 of the occupant 100 is inserted when measuring vital signs. The probe 230 (see FIGS. 6 to 8) of the fingertip pulse oximeter, which is the detection part of the rear rear sensor 200, is provided inside the opening 210. The opening 210 can be configured to be arranged in three rows, for example, so that the index finger, middle finger, and ring finger of the occupant 100 can be inserted. (The same applies to the opening 310 and the opening 410 described later) The opening 210 is arranged along the vehicle longitudinal direction, for example. The opening 210 is arranged below the switch 43.

[0016] The lever 220 is a member that guides the finger 160 of the occupant 100 to be inserted into the opening 210 during a collision. The lever 220 is arranged above the opening 210 and the switch 43. Generally, in the human body, when the arm hangs down to the side of the torso in a relaxed state, the hand often faces inward (towards the torso side and the buttocks side). Therefore, the longitudinal direction of the lever 220 is arranged along the vehicle longitudinal direction. Normally (before a collision occurs), the lever 220 is housed in or adjacent to the side surface portion 41 of the seat trim 40, and is extended outward in the vehicle width direction so as to protrude from the side surface portion 41 after a collision occurs. The configuration, operation, and function of the lever 220 will be described in detail later.

[0017] The front side sensor 300 is provided at the front part of the side surface portion 41 of the seat trim 40. Typically, the front side sensor 300 measures the vital signs of the occupant 100 when the upper body 130 of the occupant 100 has fallen forward and the arm 150 has hung down to the side of the seat surface portion 10 after a collision accident occurs. FIG. 2 is a schematic external perspective view of a vehicle seat provided with the vital sign measuring device according to the embodiment, showing a state where the upper body of the occupant has fallen forward and the arm has hung down to the side of the seat surface portion. The front side sensor 300 has an opening 310, a lever 320, etc. The opening 310 is a portion where the finger 160 of the occupant 100 is inserted when measuring vital signs. A probe (not shown) of a fingertip pulse oximeter, which is a detection part of the front side sensor 300, is provided inside the opening 310. For example, three openings 310 are arranged along the vehicle front-rear direction.

[0018] The opening 310 of the front side sensor 300 is arranged at a position higher in the vertical direction than the opening 210 of the rear side sensor 200. For example, the opening 210 is arranged at a low position with respect to the seat frame F, while the opening 310 can be arranged at a high position with respect to the seat frame F. The difference in height between such openings 210 and 310 is set in consideration of the difference in the height of the finger 160 between the state where the upper body 130 of the occupant 100 leans against the seat back 20 and the state of leaning forward.

[0019] The lever 320 is a member that guides the finger 160 of the occupant 100 to the opening 310 during a collision. The lever 320 is located above the opening 310 and is arranged near the upper edge of the side surface portion 41 of the seat trim 40. The longitudinal direction of the lever 320 is arranged along the vehicle front-rear direction. Normally, the lever 320 is housed in or adjacent to the side surface portion 41, and is extended upward so as to protrude from the side surface portion 41 after a collision occurs.

[0020] The front sensor 400 is provided on the front surface portion of the seat trim 40. Typically, the front sensor 400 measures the vital signs of the occupant 100 when the upper body 130 of the occupant 100 has fallen forward and the arm 150 has dropped along the outside of the thigh 120 in front of the seat surface portion 10 after a collision accident occurs. FIG. 3 is a schematic plan view of a side portion of a seat surface portion in a vehicle seat according to an embodiment, in a state where grip portions of respective sensors protrude. The front sensor 400 has an opening 410, a lever 420, and the like. The opening 410 is a portion into which a finger 160 of the occupant 100 is inserted during measurement of vital signs. A probe (not shown) of a fingertip pulse oximeter, which is a detection portion of the front sensor 400, is provided inside the opening 410. For example, three openings 410 are arranged along the vehicle width direction.

[0021] The lever 420 is a member that guides the finger 160 of the occupant 100 to the opening 410 during a collision. The lever 420 is located above the opening 410 and is disposed near an upper edge portion of a front surface portion 42 of the seat trim 40. Generally, in the human body, when the arm hangs down to the front side of the torso in a relaxed state, the back of the hand often faces the front side. Therefore, the longitudinal direction of the lever 420 is arranged along the vehicle width direction. Normally, the lever 420 is housed in or adjacent to the front surface portion 42, and is extended toward the front side of the vehicle so as to protrude from the front surface portion 42 after a collision occurs.

[0022] The above-described levers 220, 320, 420 are extended to protrude from the seat 1, for example, in response to an acceleration acting on the vehicle body during a collision. FIG. 4 is a schematic external perspective view of a vehicle seat provided with a vital sign measuring device according to an embodiment, showing a state where the levers of respective sensors are extended. FIG. 5 is a schematic plan view of a side portion of a seat surface portion in a vehicle seat according to an embodiment, in a state where grip portions of respective sensors protrude.

[0023] The lever 220 of the rear side sensor 200 is extended outward in the vehicle width direction from a side surface portion 41 of the seat trim 40. In the extended state, the lever 220 is supported by the stay 221. The stay 221 is provided so as to protrude inward in the vehicle width direction from the end portion on the rear side of the vehicle of the lever 220. A gap into which the thumb of the occupant 100 is inserted is formed between the lever 220 and the side surface portion 41 of the seat trim 40, and the thumb can be inserted into this gap from the upper side or the front side of the vehicle.

[0024] The lever 320 of the front side sensor 300 is extended upward from the side surface portion 41 of the seat trim 40. In the extended state, the lever 320 is supported by the stay 321. The stay 321 is provided so as to protrude downward from the end portion on the rear side of the vehicle of the lever 230. The lever 320 is arranged so as to be sandwiched between the fingers 160 and the thumb of the occupant 100 when the arm 150 is lowered with the upper body 130 of the occupant 100 tilted forward.

[0025] The lever 420 of the front sensor 400 is extended forward in the vehicle from the front surface portion 42 of the seat trim 40. In the extended state, the lever 420 is supported by the stay 421. The stay 421 is provided so as to protrude rearward from the end portion on the inner side in the vehicle width direction of the lever 420. A gap into which the thumb of the occupant 100 is inserted is formed between the lever 420 and the front surface portion 42 of the seat trim 40, and the thumb can be inserted into this gap from the upper side or the outer side in the vehicle width direction.

[0026] Hereinafter, regarding the function of guiding the fingers 160 of the occupant 100 to the measurement position where they contact the probe by the levers 220, 320, and 420 described above, the lever 220 of the rear side sensor 200 will be taken as an example for explanation. Note that the levers 320 and 420 have substantially the same operations and effects except that the protruding directions from the seat 1 are different. FIG. 6 is a schematic cross-sectional view of the rear side sensor unit in the vital sign measuring device according to the embodiment, showing the state during normal times (before a collision occurs). The rear side sensor 200 further includes a spring 222, a locking mechanism 223, a support shaft 224, a probe 230, a plate 231, an interlocking mechanism 232, and the like.

[0027] The spring 222 is provided at an end of the stay 221 opposite to the lever 220 side, and biases and presses the stay 221 in the extending direction of the lever 220 (in the case of the lever 220, outward in the vehicle width direction). The locking mechanism 223 is configured by pressing a weight by a biasing means such as a spring into a recess formed in the stay 221. During normal use of the vehicle (except when a collision occurs), the stay 221 is locked to prevent the lever 220 from being extended by the spring 222, and when a collision occurs, the lock of the stay 221 is released to allow the lever 220 to be extended by the spring 222. The locking mechanism 223 is configured to release the lock when an acceleration (for example, about 10G) that does not occur during normal use of the vehicle occurs in the vehicle body. The support shaft 224 is a rotation center shaft that rotatably supports (swings) the stay 221 in the downward direction of the lever 220 in a state where the lever 220 is extended outward in the vehicle width direction and protrudes from the side surface portion 41 of the seat trim 40.

[0028] The probe 230 is a detection unit that measures vital signs from the finger 160 of the occupant 100. The probe 230 has functions such as detecting the arterial oxygen saturation SpO2 by irradiating the nail portion of the finger 160 of the occupant 100 with light emitted by a red LED, and acquiring the pulse rate. The probe 230 is provided on the lower surface portion of the opening 210. The plate 231 is a pressing member that abuts on the fingerprint side (upper side) of the finger 160 of the occupant 100 and presses downward to crimp the nail portion to the probe 230. The plate 231 is adjacent to the upper surface portion of the opening 210 and is attached so as to be relatively displaceable in the vertical direction with respect to the opening 210. The interlocking mechanism 232 is interlocked with the rotation around the support shaft 224 of the stay 221 and moves the plate 231 downward. As the interlocking mechanism 232, for example, a region inside the vehicle width direction from the support shaft 224 of the stay 221 and the lower surface portion of the plate 231 may be connected by a cord-like member having flexibility and elasticity, and the plate 231 may be pulled downward according to the rotation of the stay 221. However, the configuration of the interlocking mechanism 232 is not limited to this and can be changed as appropriate.

[0029] FIG. 7 is a schematic cross-sectional view of the rear side sensor unit in the vital sign measuring device of the embodiment, showing the state immediately after the collision occurs. After the collision occurs, the locking mechanism 223 is released according to the acceleration acting on the vehicle body, and the lever 220 and the stay 221 are extended in the vehicle width direction by the spring 222. As a result, the lever 220 protrudes from the seat 1 in a state of having a gap with the side surface portion 41 of the seat trim 40. When the consciousness of the occupant 100 becomes drowsy due to the impact of the collision, the body becomes weak, and when the upper body 130 leans against the seat back 20 and the arm 150 descends due to its own weight, the lever 220 is sandwiched between the fingers 160 and the palm 170 and the thumb 180.

[0030] FIG. 8 is a schematic cross-sectional view of the rear side sensor unit in the vital sign measuring device of the embodiment, showing the state during vital sign measurement. The lever 220 rotates in the downward direction around the support shaft 224 with respect to the state shown in FIG. 7 due to the own weight of the arm 150 of the occupant 100. At this time, the spring 222 and the locking mechanism 223 can be configured to release the engagement and connection with the stay 221 so as not to prevent the rotation of the stay 221. The finger 160 of the occupant 100 rotates around the support shaft 224 following the rotation of the lever 220, and the fingertip is guided to be inserted into and accommodated in the opening 220. In addition, when the occupant 100 is in a relaxed state, the joints of the normal finger 160 often bend loosely. Therefore, by utilizing the bending of this joint, the fingertip can be inserted into the opening 220.

[0031] In response to the rotation around the support shaft 224 of the stay 221, the interlocking mechanism 232 moves the plate 231 downward. As a result, the fingertip of the finger 160 of the occupant 100 is pressed and restrained so that the nail part is crimped to the probe 230. Also, in response to the end of the rotation of the stay 221 (the end of the insertion of the finger 160 into the opening 210), the probe 230 starts measuring vital signs such as the arterial oxygen saturation SpO2 and pulse of the occupant. Note that the measured vital signs can be configured to be automatically transmitted to a base station (not shown) provided remotely via a communication device (not shown). The base station can share the vital signs of the occupant obtained from the vehicle in which a collision accident has occurred with organizations such as emergency, medical, and police.

[0032] Also, the levers 320 and 420 of the front side sensor 300 and the front sensor 400 also have a function of being extended to protrude from the seat 1 at the time of a collision and guiding the fingers of the occupant 100 to be inserted into the openings 310 and 410, similar to the lever 220 described above.

[0033] As described above, according to the present embodiment, the following effects can be obtained. (1) By providing the rear side sensor 200 and the front side sensor 300 below the side edge portion of the seat surface 10, even when the consciousness of the occupant 100, who is the subject to be measured, is drowsy and in a relaxed state due to the impact of a collision or the like, and the arm 150 is relaxed and droops limply to the side portion of the seat 1, the finger 160 can easily reach each sensor, and the occupant 100 can easily measure vital signs after a collision. (2) By arranging the rear side sensor 200 and the front side sensor 300 at a distance from each other in the front-rear direction, when the upper body 130 of the occupant 100 falls forward, since the arm 150 hangs down to the side portion on the front side of the seat surface portion 10 of the seat 1, the front side sensor 300 can measure the vital signs. On the other hand, when the upper body 130 of the occupant 100 leans against the seat back 20, since the arm 150 hangs down to the side portion on the rear side of the seat surface portion 10 of the seat 1, the rear side sensor 200 can measure the vital signs. (3) When the upper body 130 of the occupant 100 leans against the seat back 20, in response to the fact that the position of the hand when the arm 150 hangs down is lower than when the upper body 130 falls forward, by arranging the front side sensor 300 and the rear side sensor 200 at different heights, the vital signs can be easily measured in each posture. (4) By providing the front sensor 400 disposed below the region near the side end portion at the front edge portion of the seat surface portion 10, when the upper body 130 of the occupant 100 falls forward and the arm 150 hangs down to the front side of the seat surface portion 10 of the seat 1, the fingers 160 can easily reach the front sensor 400 naturally, and the occupant 100 can easily measure the vital signs after a collision.

[0034] (Modification example) The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the technical scope of the present invention. (1) The shape, structure, arrangement, material, manufacturing method, quantity, etc. of each member constituting the vital sign measuring device and the seat are not limited to the embodiments described above, and can be appropriately changed. (2) The configuration such as the sensor for measuring the vital signs in the embodiment and the mechanism for guiding the finger of the subject to the sensor is an example, and can be appropriately changed. In addition, in the embodiment, arterial oxygen saturation and heart rate are measured as vital signs. However, the present invention does not necessarily require the measurement of both, and a configuration may be adopted in which only one of them is measured. Further, other vital signs may be additionally or selectively measured. For example, blood pressure may be measured. (3) In the embodiment, as sensors for measuring vital signs, a rear side sensor, a front side sensor, and a front sensor are provided. However, a configuration may be adopted in which one or two of these are provided. Further, other sensors may be additionally provided in addition to these. (4) The configuration of the mechanism for guiding the finger of the person to be measured to the measurement position is not limited to the configuration of the embodiment and can be appropriately changed. For example, the shape of the lever, the feeding direction, the configuration of the mechanism for performing the feeding operation, the movement locus of the lever when guiding the finger, etc. can be appropriately changed. In addition, in the embodiment, each lever is configured to be fed out by a spring in response to the impact of a collision. However, the present invention is not limited to this, and for example, various actuators of an electric actuator may be used to feed out the lever. Further, for example, when a pre-crash determination is established based on the output of a sensor such as a stereo camera device or a millimeter wave radar device (when there is a precursor to a collision), a configuration may be adopted in which it is fed out prior to an actual collision. Furthermore, a configuration may be adopted in which the lever protrudes from the seat during normal use of the vehicle. In this case, a mechanism for feeding out the lever becomes unnecessary, and the device configuration can be simplified. (5) In the embodiment, the seat is provided, for example, for the front seat of an automobile such as a passenger car. However, the type of vehicle and the installation location of the seat are not limited to this. For example, the seat may be installed in the second row or later of a passenger car.

Explanation of Reference Numerals

[0035] 1 Seat 10 Seat Surface 20 Seat Back 30 Headrest 40 Seat Trim 41 Side Portion 42 Front Portion 43 Switch 100 Occupant 110 Hip 120 Thigh 130 Upper Body 140 Head 150 Arm 160 Finger 170 Palm 180 Thumb 200 Rear Side Sensor 210 Opening 220 Lever 230 Probe 231 Plate 232 Linkage 300 Front Side Sensor 310 Opening 320 Lever 400 Front Sensor 410 Opening 420 Lever

Claims

1. A vital sign measuring device provided on a seat having a seat surface portion on which the thighs and buttocks of the subject are placed and a seat back portion arranged along the back of the subject, the device having a sensor that measures vital signs by contacting the fingers of the subject, wherein the sensor includes a side sensor disposed below a side edge portion of the seat surface portion, and the side sensor is arranged at a position reachable by the fingers of the subject when the upper body of the subject has fallen forward or is leaning against the seat back portion of the seat and the arm of the subject has dropped to the side of the seat surface portion. A vital sign measuring device characterized by the above.

2. The side sensor includes a front side sensor and a rear side sensor that are spaced apart in the front-rear direction of the seat surface portion, the front side sensor is arranged at a position reachable by the fingers of the subject when the upper body of the subject has fallen forward and the arm of the subject has dropped to the side of the seat surface portion, and the rear side sensor is arranged at a position reachable by the fingers of the subject when the upper body of the subject is leaning against the seat back portion and the arm of the subject has dropped to the side of the seat surface portion. The vital sign measuring device according to claim 1, characterized by the above.

3. The rear side sensor is arranged at a position lower than that of the front side sensor to such an extent that when the upper body of the subject is leaning against the seat back portion and the upper body of the subject has fallen forward, the position of the hand of the subject when the arm of the subject has dropped to the side of the seat surface portion becomes lower. The vital sign measuring device according to claim 2, characterized by the above.

4. The sensor further includes a front sensor disposed below a region near a side end portion at the front edge portion of the seat surface portion, and the front sensor is arranged at a position reachable by the fingers of the subject when the upper body of the subject has fallen forward and the arm of the subject has dropped in front of the seat surface portion. The vital sign measuring device according to any one of claims 1 to 3, characterized by the above.

5. A vital sign measuring device provided on a seat having a seat surface portion on which the thighs and buttocks of the subject are placed and a seat back portion arranged along the back of the subject, the vital sign measuring device having a sensor that contacts the fingers of the subject to measure vital signs, the sensor includes a front sensor disposed below a region near a side end portion at a front edge portion of the seat surface portion, the front sensor is disposed at a position where the fingers of the subject reach in a state where the upper body of the subject has fallen forward and the arm of the subject has dropped in front of the seat surface portion, among the seats, characterized by a vital sign measuring device.

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