JP2013112044A - Seat for vehicle, and seat device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize an output signal from a respiration sensor.SOLUTION: This seat 12 for a vehicle includes: a flexible urethane foam 22 composing a cushion layer of a seat back 18; the respiration sensor 26 which is made as a film-like pressure sensor, is disposed at a height corresponding to a chest 60 of a sitting occupant at a seat width direction center portion in the seat back 18, and is provided on a seat front side of the flexible urethane foam 22; a hard urethane foam 28 which is made harder than the flexible urethane foam 22 to cover the whole of the respiration sensor 26 from the seat front side; and a slab urethane foam 30 which is made more flexible than the rigid urethane foam 28 to cover the whole of the rigid urethane foam 28 from the seat front side.

Description

  The present invention relates to a vehicle seat and a vehicle seat device.

  Conventionally, a vehicle seat provided with a film-like (sheet-like) pressure sensor on an upper portion of a seat back is known (for example, see Patent Document 1).

JP 2009-165588 A JP 2010-104570 A JP 2011-131857 A JP-A-9-276070 JP 2004-148985 A

  However, in the above-described vehicle seat, for example, depending on the seating posture of the occupant, there is a possibility that a load may be input from the occupant to the pressure sensor in one direction in the seat width direction. In this case, the value of the output signal from the pressure sensor may be lower than when a load is input to the entire pressure sensor. Therefore, in the above vehicle seat, the output signal from the pressure sensor changes depending on the seating posture of the occupant, and the output signal from the pressure sensor may not be stable.

  In particular, when this pressure sensor is used as a respiration sensor and the breathing interval of the seated occupant is accurately detected based on the output signal from this respiration sensor, it is desirable to stabilize the output signal of the respiration sensor.

  This invention is made | formed in view of the said subject, The objective is to provide the vehicle seat which can stabilize the output signal from a respiration sensor.

  Another object of the present invention is to provide a vehicle seat device that can accurately detect the breathing interval of a seated occupant.

  In order to solve the above-mentioned problems, the vehicle seat according to claim 1 and claim 5 is made of a flexible urethane foam constituting a cushion layer of a seat back and a film-like pressure sensor, and a seat width in the seat back. A respiration sensor provided on the seat front side of the flexible urethane foam, and being harder than the flexible urethane foam, and disposed at a height corresponding to a chest of a seated occupant, And a hard urethane foam covering the whole from the front side of the seat.

  According to this vehicle seat, the breathing sensor is disposed at a height corresponding to the thorax of the seated occupant in the seat width direction center portion of the seat back, and the flexible urethane foam constituting the cushion layer of the seat back It is provided on the front side of the seat. The entire respiration sensor is covered from the front side of the seat with a hard urethane foam that is harder than the soft urethane foam.

  Therefore, for example, even when a load is input from the seated occupant to the seat back while being biased to one side in the seat width direction, the load from the occupant can be input to the entire breathing sensor via the rigid urethane foam. Thereby, since the influence by a passenger | crew's sitting posture can be suppressed, the output signal from a respiration sensor can be stabilized.

  In addition, “soft” in the flexible urethane foam means a relative meaning that it is softer than the hard urethane foam, and does not mean an absolute and specific softness.

  In addition, the vehicle seat according to claim 1 further includes a slab urethane foam that is softer than the rigid urethane foam and covers the entire rigid urethane foam from the front side of the seat. Thereby, the feeling of a seat back can be made favorable and by extension, the seating feeling (sitting comfort) of the vehicle seat can be improved.

  In addition, the whole rigid urethane foam in this case is the meaning included also substantially the whole. For example, even when a hole is formed in a part of the slab urethane foam, the slab urethane foam covers the entire rigid urethane foam.

  The vehicle seat according to claim 2 is the vehicle seat according to claim 1, wherein the vehicle seat is superimposed on the slab urethane foam from the front side of the seat, and at least a part of the vehicle seat is viewed from the front side of the seat. A planar heater overlapping the breathing sensor is further provided.

  According to this vehicle seat, the sheet heater is provided. The sheet heater is superimposed on the slab urethane foam from the front side of the sheet. Therefore, for example, even if unevenness is formed on the surface of the breathing sensor in the planar heater by heating wire, the unevenness can be absorbed by the slab urethane foam.

  In addition, even if the unevenness of the planar heater cannot be absorbed by the slab urethane foam, a hard urethane foam that is harder than this slab urethane foam is disposed on the rear side of the slab urethane foam, The load from the seated occupant can be input to the entire breathing sensor while suppressing the influence of the unevenness of the heater. As described above, both the mounting of the respiration sensor on the seat back and the mounting of the planar heater can be made compatible, and the stable state of the output signal from the respiration sensor can be ensured.

  Furthermore, since the slab urethane foam is disposed as an inclusion between the planar heater and the respiration sensor, the influence of heat on the respiration sensor can be suppressed.

  The vehicular seat according to claim 3 is the vehicular seat according to claim 2, in which the end portions on both sides in the sheet width direction of the planar heater are seated more than the end portions on both sides of the seat width direction in the breathing sensor. It is set as the structure located in the width direction outer side.

  According to this vehicle seat, the end portions on both sides in the sheet width direction of the planar heater are positioned on the outer side in the seat width direction than the end portions on both sides in the seat width direction of the respiration sensor. Thereby, the expansion of the heating area | region by a planar heater can be aimed at.

  The vehicle seat according to claim 4 is the vehicle seat according to any one of claims 1 to 3, wherein the hard urethane foam has a large number of holes communicating from the front surface side to the back surface side. It is configured as a three-dimensional net.

  According to this vehicle seat, the rigid urethane foam is formed in a three-dimensional net shape having a large number of holes communicating from the front surface side to the back surface side. Thereby, for example, since this many holes can be utilized for the ventilation path from a ventilation part, mounting compatibility with an air-conditioning function can be aimed at.

  In addition, also in the vehicle seat according to claim 5, the rigid urethane foam is formed in a three-dimensional net shape having a large number of holes communicating from the front surface side to the back surface side. Therefore, for example, since these many holes can be utilized for the ventilation path from a ventilation part, mounting compatibility with an air-conditioning function can be aimed at.

  According to a sixth aspect of the present invention, in the vehicle seat according to the fourth or fifth aspect, the vehicular seat further includes a blower that blows air toward the front side of the seat through the plurality of holes.

  According to this vehicle seat, since the air blowing part is provided, the air can be blown from the air blowing part to the front side of the seat through a large number of holes in the rigid urethane foam. Thereby, since the upper body of the passenger | crew supported by the seat back can be cooled, the comfort of a vehicle seat can be improved.

  The vehicle seat according to claim 7 is the vehicle seat according to any one of claims 1 to 6, wherein the flexible urethane foam is provided on a rear side of the seat of the breath sensor and the soft seat. It is set as the structure which has a soft pad made softer than the other site | part in a urethane foam.

  According to this vehicle seat, the flexible urethane foam has the soft pad provided on the rear side of the seat of the breathing sensor. This soft pad is made softer than other parts (parts other than the soft pad) in the flexible urethane foam. Therefore, the amount of bending of the breathing sensor in the front-rear direction of the seat (in the thickness direction of the seat back) can be secured by the soft pad, so that the output signal from the breathing sensor can be further stabilized.

  The vehicular seat according to claim 8 is the vehicular seat according to any one of claims 1 to 7, wherein the respiration sensor has an upper region in the seat height direction and an upper center in the seat back. When divided equally into the area, the center lower area, and the lower area, the area is arranged in the center lower area.

  According to this vehicle seat, the respiration sensor is arranged in the center lower region among the upper region, the center upper region, the center lower region, and the lower region of the seat back. As a result, the breathing sensor is disposed at a height corresponding to the chest of the seated occupant, particularly at a position closer to the end on the back side of the diaphragm of the seated occupant, so that the breathing interval of the seated occupant can be detected more accurately. It becomes possible.

  Note that, as in the vehicle seat according to claim 9, the above-described central lower region is the range from the 5th percentile dummy of a Japanese adult woman seated in a regular posture on the vehicle seat to the 95th percentile dummy of an American adult man. It is preferable that the height corresponds to a portion extending from the first lumbar vertebra to the second lumbar vertebra.

  Moreover, in order to solve the said subject, the vehicle seat apparatus of Claim 10 WHEREIN: The vehicle seat as described in any one of Claims 1-9, and the output output from the said respiratory sensor. And a circuit unit for calculating a breathing interval of the seated occupant based on the signal.

  According to this vehicle seat device, the breathing interval of the seated occupant is calculated based on the stable output signal obtained from the breathing sensor, so that the breathing interval of the seated occupant can be detected with high accuracy.

  As described above in detail, according to the vehicle seat of the present invention, the output signal from the respiration sensor can be stabilized.

  Moreover, according to the vehicle seat device of the present invention, the breathing interval of the seated occupant can be detected with high accuracy.

It is a side view of the vehicular seat device concerning one embodiment of the present invention. It is a plane sectional view of the seat back shown in FIG. It is a figure which shows the waveform of the output signal of the respiration sensor shown by FIG. It is sectional drawing which shows the 1st modification of the vehicle seat shown by FIG. It is sectional drawing which shows the 2nd modification of the vehicle seat shown by FIG. It is a side view which shows the modification of the vehicle seat apparatus shown by FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  Note that an arrow FR, an arrow UP, and an arrow OUT shown in each figure respectively indicate the front side in the seat front-rear direction, the upper side in the seat height direction, and the outer side in the seat width direction.

  As shown in FIG. 1, a vehicle seat device 10 according to an embodiment of the present invention includes a vehicle seat 12 and a circuit unit 14. The vehicle seat 12 includes a seat cushion 16 that supports the occupant's buttocks and thighs, and a seat back 18 that supports the upper body of the occupant.

  As shown in FIG. 2, the seat back 18 includes a back board 20, a flexible urethane foam 22, a seat frame 24, a respiration sensor 26, a rigid urethane foam 28, a slab urethane foam 30, a planar heater 32, a cover pad 34, and A sheet skin 36 is provided.

  The back board 20 constitutes a back surface portion of the seat back 18 and covers a flexible urethane foam 22 described later from the back side of the seat.

  The flexible urethane foam 22 constitutes a cushion layer of the seat back 18. The flexible urethane foam 22 has a cushion main body portion 38 disposed in the seat width direction central portion of the seat back 18 and side cushion portions 40 disposed on both sides of the cushion main body portion 38 in the seat width direction. . Grooves 42 that open to the front side of the seat and extend in the seat height direction are formed at the boundary between the cushion body 38 and the side cushion 40, respectively.

  The seat frame 24 supports the flexible urethane foam 22. In FIG. 2, only the pair of side frame portions 44 disposed on both sides in the seat width direction with respect to the cushion main body portion 38 and extending in the seat height direction is illustrated in the seat frame 24. It has a connecting frame for connecting a pair of side frames.

  The respiration sensor 26 is a film-like pressure sensor. The respiration sensor 26 is arranged at a height corresponding to the chest 60 (see FIG. 1) of the seated occupant in the center of the seat back 18 in the seat width direction.

  That is, as shown in FIG. 1, the respiration sensor 26 equally divides the seat back 18 into an upper region 18A, a central upper region 18B, a central lower region 18C, and a lower region 18D in the seat height direction. In this case, it is arranged in the center lower region 18C. This lower center region 18C is formed from the first lumbar vertebra to the second lumbar vertebra (reference numerals 62 and 64 in FIG. The height corresponding to the part leading to (see).

  Moreover, this respiration sensor 26 is provided in the seat front side of the cushion main-body part 38 (soft urethane foam 22), as FIG. 2 shows. The respiration sensor 26 is accommodated in a recess 38A formed in the cushion main body 38 so as to open to the front side of the seat, and the bottom 38B of the recess 38A is gently curved so as to be convex on the rear side of the seat. Is formed. Then, following the curvature of the bottom portion 38B, the film-shaped respiration sensor 26 is also curved so as to protrude toward the rear side of the seat.

  The rigid urethane foam 28 is harder than the flexible urethane foam 22. The rigid urethane foam 28 is narrower in the seat width direction than the cushion main body 38 and is disposed in the center portion of the seat back 18 in the seat width direction.

  The rigid urethane foam 28 is formed larger than the respiration sensor 26 and covers the entire respiration sensor 26 from the front side of the seat. And the edge part of the sheet | seat width direction both sides in this rigid urethane foam 28 is located in the sheet | seat width direction outer side rather than the edge part of the sheet | seat width direction both sides in the respiration sensor 26. FIG. Moreover, the upper end part and lower end part in this rigid urethane foam 28 are each located in the upper side and the lower side rather than the upper end part and lower end part in the respiration sensor 26 (refer FIG. 1).

  The slab urethane foam 30 is softer than the hard urethane foam 28. The slab urethane foam 30 is provided over the entire front surface of the cushion main body 38, and covers the entire rigid urethane foam 28 from the front side of the seat.

  In this case, the entire rigid urethane foam 28 is intended to include substantially the entire structure. For example, even when a hole is formed in a part of the slab urethane foam 30, the slab urethane foam 30 covers the entire hard urethane foam 28.

  The planar heater 32 has a heating wire and is superposed on the slab urethane foam 30 from the front side of the sheet. The planar heater 32 is provided from one end side to the other end side in the seat width direction of the cushion main body 38 and is disposed at a position corresponding to the breathing sensor 26 in the seat height direction. The sheet heater 32 is wider in the sheet width direction than the breathing sensor 26, and the end portions on both sides in the sheet width direction of the sheet heater 32 are end portions on both sides of the sheet width direction in the breathing sensor 26. It is located outside the sheet width direction.

  Moreover, the upper end part and lower end part in this planar heater 32 are each located in the upper side and the lower side rather than the upper end part and lower end part in the respiration sensor 26 (refer FIG. 1). That is, the planar heater 32 is sized and arranged so as to overlap the entire breathing sensor 26 when the seat back 18 is viewed from the front side of the seat. The planar heater 32 may be sized and arranged so that at least a portion thereof overlaps the respiration sensor 26 when the seat back 18 is viewed from the front side of the seat.

  The cover pad 34 is made of, for example, a urethane pad. The cover pad 34 is provided on the front side of the sheet heater 32 and covers the entire front surface of the cushion main body 38 from the front side of the seat. The seat cover 36 covers the entire cover pad 34 from the front side of the seat, and is sewn inside the seat cover (not shown) that covers the entire side cushion portion 40 and the groove portion 42 described above.

  The circuit unit 14 shown in FIG. 1 calculates a breathing interval of a seated occupant based on an output signal output from the breathing sensor 26, and is configured by an electronic circuit having a CPU or the like, for example. The circuit unit 14 is installed at a place other than the vehicle seat 12 or is integrally assembled with the vehicle seat 12.

  Next, the operation of the vehicle seat device 10 having the above configuration will be described.

  When an occupant sitting on the vehicle seat 12 inhales, the upper body of the occupant swells, and a load is applied to the respiration sensor 26 via the cover pad 34, the planar heater 32, the slab urethane foam 30, and the rigid urethane foam 28. Is entered. When the occupant exhales, the upper body of the occupant is deflated, and the load input to the respiration sensor 26 is released accordingly.

  When a load is input to the respiration sensor 26, the value of the output signal from the respiration sensor 26 increases, and when the load input to the respiration sensor 26 is weakened, the value of the output signal from the respiration sensor 26 decreases. To do.

  That is, as shown in the signal waveform of FIG. 3, in the period T1 when the seated occupant inhales, the value of the output signal S from the breath sensor 26 rises, and during the period T2 when the seated occupant exhales The value of the output signal S from the respiration sensor 26 decreases. The period T3 is a transition period from when the seated occupant breathes until the next breath is started.

  The circuit unit 14 shown in FIG. 1 calculates the breathing interval of the seated occupant based on the output signal from the breathing sensor 26 described above. That is, for example, as shown in FIG. 3, the circuit unit 14 has a period from when the peak value P1 of the output signal S obtained every time the seated occupant breathes until the next peak value P2 is obtained. The time t is counted by a counter circuit or the like as the breathing interval of the seated occupant.

  The count value obtained by the circuit unit 14, that is, the value representing the breathing interval of the seated occupant is used to control a driving device (not shown) in the circuit unit 14 and other control units.

  Next, the operation and effect of one embodiment of the present invention will be described.

  As described above in detail, according to the vehicle seat 12 according to the embodiment of the present invention, the respiration sensor 26 is the height corresponding to the chest 60 of the seated occupant in the seat width direction central portion of the seat back 18. The flexible urethane foam 22 constituting the cushion layer of the seat back 18 is provided on the front side of the seat. The entire respiration sensor 26 is covered from the front side of the seat by a hard urethane foam 28 that is harder than the soft urethane foam 22.

  Therefore, for example, even when a load is input from the seated occupant to the seat back 18 while being biased to one side in the seat width direction, the load from the occupant can be input to the entire breathing sensor 26 via the rigid urethane foam 28. it can. Thereby, since the influence by a passenger | crew's sitting posture can be suppressed, the output signal from the respiration sensor 26 can be stabilized.

  That is, if a load is input from the occupant to the seat back 18 with a bias toward one side in the seat width direction with the rigid urethane foam 28 omitted, the distribution of the load input to the respiration sensor 26 is unsatisfactory. It becomes uniform. Therefore, as indicated by the output signal S1 in FIG. 3, the waveform of the output signal S1 may be disturbed or the peak value may be lowered. On the other hand, according to the vehicle seat 12 according to the embodiment of the present invention, since the load is input to the entire respiration sensor 26, the distribution of the load input to the respiration sensor 26 becomes uniform. Therefore, the waveform of the output signal S can be improved and the peak value can be increased.

  In addition, the respiration sensor 26 is formed to be curved so as to protrude toward the rear side of the seat. Therefore, since the respiratory sensor 26 is shaped along the upper body of the seated occupant, the output signal from the respiratory sensor 26 can be further stabilized.

  Further, according to the vehicle seat device 10 provided with the vehicle seat 12, the breathing interval of the seated occupant is calculated based on the stable output signal obtained from the breathing sensor 26, so the breathing interval of the seated occupant Can be detected with high accuracy.

  Moreover, the respiration sensor 26 is disposed in the lower center region 18C of the upper region 18A, the central upper region 18B, the central lower region 18C, and the lower region 18D of the seat back 18. Thereby, since the respiration sensor 26 is disposed at a height corresponding to the chest 60 of the seated occupant, it is possible to accurately detect the breathing interval of the seated occupant.

  In particular, the central lower region 18C is formed from the first lumbar vertebra to the second lumbar vertebra (reference numeral 62 in FIG. , 64)). As a result, the breathing sensor 26 is disposed at a position closer to the back side end portion 66A of the seat occupant's diaphragm 66, so that the breathing interval of the seated occupant can be detected with higher accuracy.

  Further, the entire rigid urethane foam 28 is made softer than the rigid urethane foam 28 and is covered with a slab urethane foam 30 from the front side of the sheet. Thereby, the feeling of the seat back 18 can be made favorable, and as a result, the seating feeling (sitting comfort) of the vehicle seat 12 can be improved.

  The vehicle seat 12 includes a sheet heater 32 with a heating wire. The sheet heater 32 is superimposed on the slab urethane foam 30 from the front side of the sheet. Therefore, even if unevenness is formed on the surface of the planar heater 32 on the side of the breathing sensor 26 by the heating wire, the unevenness can be absorbed by the slab urethane foam 30.

  Even if the unevenness of the planar heater 32 cannot be absorbed by the slab urethane foam 30, the rigid urethane foam 28 that is harder than the slab urethane foam 30 is disposed on the rear side of the slab urethane foam 30. Thus, the influence of the unevenness of the planar heater 32 can be suppressed, and the load from the seated occupant can be input to the entire breathing sensor 26. As described above, both the mounting of the respiration sensor 26 on the seat back 18 and the mounting of the planar heater 32 can be made compatible, and a stable state of the output signal from the respiration sensor 26 can be ensured.

  Furthermore, the foreign object feeling of the respiration sensor 26 and the rigid urethane foam 28 can be suppressed. Further, since the slab urethane foam 30 is disposed as an inclusion between the planar heater 32 and the respiration sensor 26, the influence of heat on the respiration sensor 26 can be suppressed.

  Further, the end portions on both sides in the sheet width direction of the planar heater 32 are located on the outer side in the sheet width direction with respect to the end portions on both sides in the sheet width direction of the respiration sensor 26. Thereby, the expansion of the heating area | region by the planar heater 32 can be aimed at.

  Next, a modification of one embodiment of the present invention will be described.

  In the said embodiment, the rigid urethane foam 28 may be formed in the three-dimensional net shape which has many holes connected from the surface side to a back surface side.

  In addition, as shown in FIG. 4, when the rigid urethane foam 28 is formed in a three-dimensional net shape, a duct-shaped air blowing portion 50 may be provided on the rear side of the rigid urethane foam 28. Then, a blower (not shown) may be connected to the duct-shaped blower 50 and a large number of holes in the rigid urethane foam 28 may be used as a blower passage from the blower 50.

  If comprised in this way, it can blow to the sheet | seat front side from the ventilation part 50 through many holes in the rigid urethane foam 28. FIG. Thereby, since the upper body of the passenger | crew supported by the seat back 18 can be cooled, the comfort of the vehicle seat 12 can be improved.

  Note that the blower connected to the duct-shaped blower 50 described above may be built in the vehicle seat 12 or provided outside the vehicle seat 12. Moreover, the air blower 50 may be a blower built in the seat back 18 in addition to a duct connected to a blower (not shown).

  Moreover, in the said embodiment, the flexible urethane foam 22 may have the soft pad 52 provided in the sheet | seat rear side of the respiration sensor 26, as FIG. 5 shows. This soft pad 52 is made softer than other portions 54 in the flexible urethane foam 22.

  With this configuration, the soft pad 52 can ensure the amount of flexion of the breathing sensor 26 in the front-rear direction of the seat (the thickness direction of the seatback 18), so that the output signal from the breathing sensor 26 can be further increased. It can be stabilized. In this case, when the soft pad 52 is sized and arranged so as to overlap the entire respiration sensor 26 when the seat back 18 is viewed from the rear side of the seat, the amount of bending of the respiration sensor 26 is more effective. Therefore, it can be ensured.

  Moreover, in the said embodiment, as shown in FIG. 6, the auxiliary | assistant sensor 56 arrange | positioned at the center upper area | region 18B may be provided in the vehicle seat 12. As shown in FIG. The auxiliary sensor 56 is a film-like pressure sensor similar to the breathing sensor 26, and is disposed at a height corresponding to the chest 60 of the seated occupant and is provided on the front side of the flexible urethane foam 22. . The auxiliary sensor 56 is also covered entirely with the hard urethane foam 28 from the front side of the seat, like the breath sensor 26.

  In this case, the circuit unit 14 determines whether the breathing interval of the seated occupant is based on the output signal from the sensor having the better output signal waveform or the higher peak value of the breath sensor 26 and the auxiliary sensor 56. May be calculated. If comprised in this way, the space | interval of a seated crew member's breathing can be detected more accurately.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

DESCRIPTION OF SYMBOLS 10 Vehicle seat apparatus 12 Vehicle seat 14 Circuit unit 18 Seat back 18A Upper area | region 18B Center upper area | region 18C Center lower area | region 18D Lower area | region 22 Soft urethane foam 26 Respiration sensor 28 Hard urethane foam 30 Slab urethane foam 32 Planar heater 34 Cover pad 36 Sheet epidermis 50 Air blower 52 Soft pad 54 Other parts 56 Auxiliary sensor 60 Thorax 62 First lumbar vertebra 64 Second lumbar vertebra 66 Diaphragm

Claims (10)

A flexible urethane foam that forms the cushion layer of the seat back;
A pressure sensor in the form of a film, disposed at a height corresponding to the chest of the seated occupant in the seat width direction center of the seat back, and a breathing sensor provided on the seat front side of the flexible urethane foam;
Rigid urethane foam that is harder than the flexible urethane foam, and covers the entire breathing sensor from the front side of the seat,
A slab urethane foam that is softer than the rigid urethane foam and covers the entire rigid urethane foam from the front side of the sheet,
Vehicle seat equipped with The sheet heater is overlapped with the slab urethane foam from the front side of the sheet, and has a planar heater that overlaps with the respiration sensor when the seat back is viewed from the front side of the sheet.
The vehicle seat according to claim 1. Ends on both sides of the sheet heater in the sheet width direction are located on the outer side in the sheet width direction than ends on both sides of the breathing sensor in the sheet width direction.
The vehicle seat according to claim 2. The rigid urethane foam is formed in a three-dimensional net shape having a large number of holes communicating from the front side to the back side.
The vehicle seat according to any one of claims 1 to 3. A flexible urethane foam that forms the cushion layer of the seat back;
A pressure sensor in the form of a film, disposed at a height corresponding to the chest of the seated occupant in the seat width direction center of the seat back, and a breathing sensor provided on the seat front side of the flexible urethane foam;
Rigid urethane foam, which is harder than the flexible urethane foam, covers the entire breathing sensor from the front side of the sheet, and is formed in a three-dimensional net shape having a large number of holes communicating from the front side to the back side;
Vehicle seat equipped with It was provided with a blower that blows air to the front side of the sheet through the numerous holes.
The vehicle seat according to claim 4 or 5. The flexible urethane foam has a soft pad that is provided on the rear side of the sheet of the respiratory sensor and is softer than other parts of the flexible urethane foam.
The vehicle seat according to any one of claims 1 to 6. The respiration sensor is disposed in the central lower region when the seat back is equally divided into an upper region, a central upper region, a central lower region, and a lower region in the seat height direction. ,
The vehicle seat according to any one of claims 1 to 7. The lower central region has a height corresponding to a portion from the first lumbar vertebra to the second lumbar vertebra in the 5th percentile dummy of a Japanese adult female seated in a normal posture on the vehicle seat to the 95th percentile dummy of an American adult male. ing,
The vehicle seat according to claim 8. The vehicle seat according to any one of claims 1 to 9,
A circuit unit for calculating a breathing interval of a seated occupant based on an output signal output from the breathing sensor;
A vehicle seat device comprising:

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