JP5882112B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat.

  Conventionally, a vehicular seat provided with a film-like pressure sensor is known (for example, refer to patent documents 1).

JP 2009-165588 A JP 2009-112698 A JP 2011-105138 A JP 2003-117270 A

  However, in this type of vehicle seat, the output of the pressure sensor decreases if the tension of the seat skin is strong at the position where the pressure sensor is disposed, and the output of the pressure sensor may increase if the tension of the seat skin is weak. is there. Therefore, there is room for improvement in order to suppress fluctuations in the output of the pressure sensor.

  This invention is made | formed in view of the said subject, The objective is to provide the vehicle seat which can suppress the fluctuation | variation of the output of a pressure sensor.

  In order to solve the above-described problem, a vehicle seat according to claim 1 includes a cushion portion, a film-like pressure sensor provided on the cushion portion, a seat skin covering the cushion portion, and a pressure sensor. A suppression unit that is provided on the outer side in the sheet width direction and suppresses the tension of the sheet skin at the position where the pressure sensor is disposed.

  According to this vehicle seat, the suppression part which suppresses the tension | tensile_strength of the seat skin in the arrangement | positioning site | part of a pressure sensor is provided in the sheet | seat width direction outer side of the pressure sensor. Therefore, even when there is a manufacturing variation in the structural part that determines the tension of the seat skin, the restraining portion can suppress the tension of the seat skin at the position where the pressure sensor is arranged. Thereby, since the dispersion | variation in the tension | tensile_strength of a sheet | seat skin can be absorbed, the fluctuation | variation of the output of a pressure sensor can be suppressed.

  The vehicle seat according to claim 2 is the vehicle seat according to claim 1, wherein the cushion portion is provided in a seat back, and the suppression portion is the pressure sensor in the height direction of the seat back. It is the structure provided only in the corresponding position.

  If the restraining portion is formed over the entire length in the height direction of the seat back, the tension of the seat cover is weakened over the entire length in the height direction of the seat back, and the appearance of the seat back may be deteriorated. is there.

  On the other hand, according to the vehicle seat of the second aspect, the suppressing portion is provided only at a position corresponding to the pressure sensor in the height direction of the seat back. Therefore, the tension of the seat cover can be suppressed only at the position corresponding to the pressure sensor in the height direction of the seat back. Thereby, it can suppress that the appearance of a seat back worsens.

  The vehicle seat according to claim 3 is the vehicle seat according to claim 2, wherein at least a part of the suppressing portion in the height direction of the seat back is the height direction of the pressure sensor and the seat back. The configuration is overlapped with each other.

  According to this vehicle seat, at least a part of the suppressing portion in the height direction of the seat back is overlapped in the height direction of the pressure sensor and the seat back. Accordingly, it is possible to more effectively suppress the tension of the seat cover at the position where the pressure sensor is disposed in the height direction of the seat back.

  The vehicle seat according to claim 4 is the vehicle seat according to any one of claims 1 to 3, wherein the cushion portion is provided in a seat back, and the pressure sensor in the cushion portion is used. Is formed in the seat width direction outer side portion in the height direction of the seat back, and a hanging groove in which the seat width direction outer side portion of the seat skin is hung is formed, and the restraining portion includes the pressure sensor and the suspension. It is set as the opening part formed in the said cushion part between groove | channels.

  According to this vehicle seat, the suppressing portion is an opening formed in the cushion portion between the pressure sensor and the hanging groove. Therefore, the deformation of the opening can suppress the tension of the sheet skin at the position where the pressure sensor is disposed.

  The vehicle seat according to claim 5 is the vehicle seat according to any one of claims 1 to 3, wherein the cushion portion is provided on a seat back, and the pressure sensor in the cushion portion is used. A suspension groove extending in the height direction of the seat back is formed in a portion outside the seat width direction, and an outer portion in the seat width direction of the seat cover extends in the height direction of the seat back and is accommodated in the suspension groove. A recessed portion that is suspended in the suspension groove by a suspended suspension wire and that is formed on the suspension wire at a position corresponding to the pressure sensor in the height direction of the seat back and recessed toward the front side of the seat back It is set as the structure.

  According to this vehicle seat, the suppressing portion is formed as a hanging wire at a position corresponding to the pressure sensor in the height direction of the seat back, and is a concave portion that is recessed toward the front side of the seat back. Therefore, since the sheet skin is not drawn in the concave portion, the tension of the sheet skin at the position where the pressure sensor is arranged can be suppressed.

  The vehicle seat according to claim 6 is the vehicle seat according to claim 5, wherein a bent portion that is bent toward the front side of the seat back is formed at an end portion in the longitudinal direction of the suspension wire. The protruding dimension of the concave part from the general part of the hanging wire is set to be smaller than the protruding dimension of the bent part from the general part of the hanging wire.

  According to this vehicle seat, the protruding dimension of the concave part from the general part of the hanging wire is set smaller than the protruding dimension of the bent part from the general part of the hanging wire. Accordingly, since the concave portion can be prevented from being caught when the hanging wire is inserted into the hanging cotton cloth, the hanging wire can be easily inserted into the hanging cotton cloth.

The vehicular seat according to claim 7 is the vehicular seat according to claim 2 or 3 , wherein the seat back has a height direction at a position outside the pressure sensor in the cushion portion in the seat width direction. A suspension groove extending in a seat width direction is formed in the seat cover, and the restraining portion is suspended in the suspension groove by a suspension fastener that extends in the height direction of the seat back and is accommodated in the suspension groove. In the position corresponding to the pressure sensor in the height direction of the seat back, a broken portion is formed in a part of the hanging fastener.

  According to this vehicle seat, the suppressing portion is a break portion formed in a part of the hanging fastener at a position corresponding to the pressure sensor in the height direction of the seat back. Accordingly, since the sheet skin is not pulled in at the position corresponding to the broken portion, the tension of the sheet skin at the position where the pressure sensor is arranged can be suppressed.

  As described above in detail, according to the vehicle seat of the present invention, variations in the tension of the seat skin can be absorbed, so that fluctuations in the output of the pressure sensor can be suppressed.

1 is a front view of a vehicle seat according to a first embodiment of the present invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. It is a front view which shows the seat back in 2nd embodiment of this invention. FIG. 4 is a side view of the hanging wire shown in FIG. 3. It is a front view which shows the seat back in 3rd embodiment of this invention. FIG. 6 is a sectional view taken along line 6-6 of FIG.

[First embodiment]
First, a first embodiment of the present invention will be described.

  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, the vehicle seat 10 according to the first embodiment of the present invention includes a seat cushion 16 that supports an occupant's buttocks and thighs, and a seat back 18 that supports the upper body of the occupant. I have.

  As shown in FIG. 2, the seat back 18 includes a back board 20, a flexible urethane foam 22, a seat frame 24, a pressure 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.

  In FIG. 2, only one half of the seat back 18 is shown, but the seat back 18 has a symmetrical configuration. Further, in FIG. 1, the rigid urethane foam 28, the slab urethane foam 30, the planar heater 32, and the cover pad 34 shown in FIG. 2 are omitted.

  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 includes a cushion main body portion 38 disposed in the center portion of the seat back 18 in the seat width direction and a side cushion portion 40 disposed outside the cushion main body portion 38 in the seat width direction. The cushion main body portion 38 is an example of a cushion portion in the present invention. A suspension groove 42 that opens to the front side of the seat and extends in the height direction of the seat back 18 is formed in a portion of the cushion main body 38 on the side cushion portion 40 side (outside of the pressure sensor 26 described later in the seat width direction). Yes. This flexible urethane foam 22 is supported by a seat frame 24.

  The pressure sensor 26 is, for example, for detecting a breathing motion of an occupant seated on the vehicle seat 10 and is formed in a film shape. The pressure sensor 26 is provided on the surface portion of the cushion main body 38. Further, the pressure sensor 26 is disposed in the center portion in the seat width direction of the cushion main body 38.

  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 at the center of the cushion main body 38 in the seat width direction. The rigid urethane foam 28 is formed larger than the pressure sensor 26 and covers the entire pressure sensor 26 from the front side of the seat.

  The slab urethane foam 30 is softer than the hard urethane foam 28. The slab urethane foam 30 covers the entire rigid urethane foam 28 from the front side of the seat.

  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 pressure sensor 26 in the height direction of the seat back 18.

  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 substantially the entire front surface of the cushion body 38 from the front side of the seat.

  The seat skin 36 is provided on the seat front side of the cover pad 34 and covers substantially the entire front surface of the cushion main body 38 from the seat front side. The seat cover 36 is sewn inside the seat cover 37 that covers the side cushion portion 40 and the above-described suspension groove 42.

  A cylindrical hanging cotton cloth 44 extending in the height direction of the seat back 18 is formed on the outer side portion 36 </ b> A in the seat width direction of the seat cover 36. A suspension wire 46 extending in the height direction of the seat back 18 is inserted inside the suspension cotton fabric 44. On the other hand, the cushion body 38 is provided with a fixing wire 48 extending in the height direction of the seat back 18 along the hanging groove 42. The hanging wire 46 is fixed to the fixing wire 48 via the fixing ring 50 while being accommodated in the hanging groove 42. Accordingly, the sheet width direction outer side portion 36 </ b> A in the sheet skin 36 and the sheet width direction inner side portion 37 </ b> A in the sheet skin 37 are suspended in the suspension groove 42.

  The cushion main body 38 has a concave opening 52 that extends in the height direction of the seat back 18 and opens to the front side of the seat. The opening 52 is an example of the suppressing portion in the present invention, and is formed between the pressure sensor 26 and the suspension groove 42 in the seat width direction.

  As shown in FIG. 1, the opening 52 is provided only at a position corresponding to the pressure sensor 26 in the height direction of the seat back 18, and both end portions 52 </ b> A and 52 </ b> B in the longitudinal direction are provided at the pressure sensor 26. The seat back 18 is positioned on both sides in the height direction. In the opening 52, a central portion 52C excluding both end portions 52A and 52B in the longitudinal direction is overlapped in the height direction of the pressure sensor 26 and the seat back 18 (overlap length L). In the present embodiment, as an example, the upper end of the opening 52 in the height direction is located at substantially the same position as the upper end of the pressure sensor 26 in the height direction, and the lower end of the opening 52 in the height direction is the pressure. The sensor 26 is located at substantially the same position as the lower end in the height direction.

  Note that the above-mentioned position corresponding to the pressure sensor 26 in the height direction of the seat back 18 is not only a region completely overlapping in the height direction of the pressure sensor 26 and the seat back 18 but also this overlapping region. In other words, it includes a region protruding from both sides of the seat back 18 in the height direction.

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

  According to the vehicle seat 10 according to the first embodiment of the present invention, the cushion body 38 is formed with the opening 52 between the pressure sensor 26 and the suspension groove 42 in the seat width direction. Therefore, even when there is a manufacturing variation in the structural parts that determine the tension of the seat skin 36, the tension of the seat skin 36 at the position where the pressure sensor 26 is disposed can be suppressed by the deformation of the opening 52. Thereby, since the dispersion | variation in the tension | tensile_strength of the sheet | seat outer skin 36 can be absorbed, the fluctuation | variation of the output of the pressure sensor 26 can be suppressed.

  A part of the opening 52 in the height direction of the seat back 18 (a part on the center side excluding both end portions in the longitudinal direction) is overlapped in the height direction of the pressure sensor 26 and the seat back 18. Therefore, the deformation of the opening 52 makes it possible to more effectively suppress the tension of the seat skin 36 at the position where the pressure sensor 26 is disposed in the height direction of the seat back 18.

  In addition, since the configuration for suppressing the tension of the seat skin 36 at the position where the pressure sensor 26 is disposed is the opening 52 formed in the cushion main body 38, the tension of the seat skin 36 can be increased with a simple configuration. Can be suppressed.

  By the way, when the opening 52 is formed over the entire length in the height direction of the seat back 18, the tension of the seat cover 36 is weakened over the entire length in the height direction of the seat back 18, and the appearance of the seat back 18 is improved. May get worse.

  On the other hand, according to the vehicle seat 10 according to the first embodiment of the present invention, the opening 52 is provided only at a position corresponding to the pressure sensor 26 in the height direction of the seat back 18. Therefore, the tension of the seat skin 36 can be suppressed only at the position corresponding to the pressure sensor 26 in the height direction of the seat back 18. Thereby, it can suppress that the appearance of the seat back 18 worsens.

  In the first embodiment of the present invention, the opening 52 has a central portion 52C, excluding both ends 52A and 52B in the longitudinal direction, overlapped in the height direction of the pressure sensor 26 and the seat back 18. However, the entire opening 52 in the height direction of the seat back 18 may be overlapped in the height direction of the pressure sensor 26 and the seat back 18.

  Moreover, although the opening part 52 was formed in the concave shape opened to a sheet | seat front side, you may be made into the through-hole penetrated in a sheet | seat front-back direction.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.

  In the second embodiment of the present invention shown in FIG. 3, the configuration of the seat back 18 is changed as follows with respect to the first embodiment described above.

  That is, the hanging wire 46 is formed with a concave portion 62 at a position corresponding to the pressure sensor 26 in the height direction of the seat back 18. The concave portion 62 is an example of the suppressing portion in the present invention, and is formed to be recessed toward the front side of the seat back 18 as shown in FIG.

  The concave portion 62 is provided only at a position corresponding to the pressure sensor 26 in the height direction of the seat back 18, and both end portions 62 </ b> A and 62 </ b> B in the height direction of the seat back 18 are provided by the pressure sensor 26. Are also located on both sides of the seat back 18 in the height direction. A portion 62C on the central side excluding both end portions 62A and 62B in the concave portion 62 is overlapped in the height direction of the pressure sensor 26 and the seat back 18 (overlap length L).

  Note that the above-mentioned position corresponding to the pressure sensor 26 in the height direction of the seat back 18 is not only a region completely overlapping in the height direction of the pressure sensor 26 and the seat back 18 but also this overlapping region. In other words, it includes a region protruding from both sides of the seat back 18 in the height direction.

  Further, bent portions 66 that are bent toward the front side of the seat back 18 are formed at both ends in the longitudinal direction of the hanging wire 46. And the protrusion dimension L1 of the recessed part 62 from the general part 64 (part between the recessed part 62 and the bending part 66) of this hanging wire 46 is the bending part 66 from the general part 64 of this hanging wire 46. Is set smaller than the projecting dimension L2 (L1 <L2).

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

  According to the second embodiment of the present invention, the hanging wire 46 is formed with a recessed portion 62 that is recessed toward the front side of the seat back 18 at a position corresponding to the pressure sensor 26 in the height direction of the seat back 18. . Therefore, even if there is a manufacturing variation in the structural part that determines the tension of the seat skin 36, the seat skin 36 is not drawn in the concave portion 62, so that the tension of the seat skin 36 at the position where the pressure sensor 26 is disposed is suppressed. Can do. Thereby, since the dispersion | variation in the tension | tensile_strength of the sheet | seat outer skin 36 can be absorbed, the fluctuation | variation of the output of the pressure sensor 26 can be suppressed.

  Moreover, since the structure for suppressing the tension | tensile_strength of the sheet | seat cover 36 in the arrangement | positioning site | part of the pressure sensor 26 is made into the concave part 62 formed in the hanging wire 46, the tension | tensile_strength of the sheet | seat cover 36 is suppressed with a simple structure. can do.

  Further, the protruding dimension L1 of the concave portion 62 from the general portion 64 of the hanging wire 46 is set to be smaller than the protruding dimension L2 of the bent portion 66 from the general portion 64 of the hanging wire 46. Therefore, the concave portion 62 can be prevented from being caught when the hanging wire 46 is inserted into the hanging cotton cloth 44 (see FIG. 2), so that the hanging wire 46 can be easily inserted into the hanging cotton cloth 44. it can.

  In the second embodiment of the present invention, the concave portion 62 is such that a portion 62C on the center side excluding both end portions 62A and 62B in the longitudinal direction is overlapped in the height direction of the pressure sensor 26 and the seat back 18. However, the entire concave portion 62 in the height direction of the seat back 18 may be overlapped in the height direction of the pressure sensor 26 and the seat back 18.

[Third embodiment]
Next, a third embodiment of the present invention will be described.

  In the third embodiment of the present invention shown in FIG. 5, the configuration of the seat back 18 is changed as follows with respect to the first embodiment described above.

  That is, the seat width direction outer side portion 36 </ b> A of the seat cover 36 is suspended in the suspension groove 42 by the suspension fastener 70 extending in the height direction of the seat back 18. As shown in FIG. 6, the hanging fastener 70 includes a fixing portion 74 accommodated in the hanging groove 42 and a fixed portion 76 fixed to the seat width direction outer side portion 36 </ b> A of the seat cover 36. Yes. The fixed portion 76 is fixed to the fixing portion 74. In addition to the seat width direction outer side portion 36A of the seat skin 36, the seat width direction inner side portion 37A of the seat skin 37 that covers the side cushion portion 40 is fixed to the fixing portion 74.

  Further, as shown in FIG. 5, the suspended fastener 70 is formed with a breaking portion 82 at a position corresponding to the pressure sensor 26 in the height direction of the seat back 18. The broken portion 82 is an example of a suppressing portion in the present invention, and a portion of the hanging fastener 70 is broken. The suspended fastener 70 is separated into an upper fastener 70A and a lower fastener 70B by the broken portion 82.

  Further, the break portion 82 is provided only at a position corresponding to the pressure sensor 26 in the height direction of the seat back 18, and both end portions 82 </ b> A and 82 </ b> B in the height direction of the seat back 18 are provided by the pressure sensor 26. Are also located on both sides of the seat back 18 in the height direction. A portion 82C on the center side excluding both end portions 82A and 82B in the broken portion 82 is overlapped in the height direction of the pressure sensor 26 and the seat back 18 (overlap length L).

  Note that the above-mentioned position corresponding to the pressure sensor 26 in the height direction of the seat back 18 is not only a region completely overlapping in the height direction of the pressure sensor 26 and the seat back 18 but also this overlapping region. In other words, it includes a region protruding from both sides of the seat back 18 in the height direction.

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

  According to the third embodiment of the present invention, the suspended fastener 70 is formed with a breaking portion 82 that breaks a part of the suspended fastener 70 at a position corresponding to the pressure sensor 26 in the height direction of the seat back 18. ing. Therefore, even if there is a manufacturing variation in the structural part that determines the tension of the seat skin 36, the seat skin 36 is not pulled in at a position corresponding to the fracture portion 82. Therefore, the tension of the seat skin 36 at the position where the pressure sensor 26 is disposed. Can be suppressed. Thereby, since the dispersion | variation in the tension | tensile_strength of the sheet | seat outer skin 36 can be absorbed, the fluctuation | variation of the output of the pressure sensor 26 can be suppressed.

  Moreover, since the structure for suppressing the tension | tensile_strength of the sheet | seat cover 36 in the arrangement | positioning site | part of the pressure sensor 26 is made into the fracture | rupture part 82 formed in the suspension fastener 70, the tension | tensile_strength of the sheet | seat cover 36 is suppressed with a simple structure. can do.

  In the third embodiment of the present invention, the fracture portion 82 is such that a central portion 82C excluding both longitudinal end portions 82A and 82B is overlapped in the height direction of the pressure sensor 26 and the seat back 18. However, the entire breaking portion 82 in the height direction of the seat back 18 may be overlapped in the height direction of the pressure sensor 26 and the seat back 18.

  Further, in each of the above-described embodiments, an example in which a restraining portion (opening 52, concave portion 62, breakage portion 82) for suppressing the tension of the seat skin 36 and the pressure sensor 26 are provided on the seat back 18 will be described. However, the suppression unit and the pressure sensor 26 may be provided in the seat cushion 16.

  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 18 Seat back 22 Flexible urethane foam 26 Pressure sensor 36 Seat skin 38 Cushion body part (cushion part)
40 Side cushion part 42 Hanging groove 44 Hanging cotton cloth 46 Hanging wire 52 Opening part (suppression part)
62 Concave part (restraint part)
64 General part 66 Bent part 70 Suspended fastener 82 Break part (restraint part)

Claims (7)

A cushion,
A film-like pressure sensor provided in the cushion part;
A seat skin covering the cushion part;
A suppression unit that is provided on the outer side of the pressure sensor in the sheet width direction, and suppresses the tension of the sheet skin at the arrangement site of the pressure sensor;
Vehicle seat equipped with The cushion portion is provided on a seat back,
The suppression unit is provided only at a position corresponding to the pressure sensor in the height direction of the seat back.
The vehicle seat according to claim 1. At least a part of the suppression portion in the height direction of the seat back is overlapped in the height direction of the pressure sensor and the seat back.
The vehicle seat according to claim 2. The cushion portion is provided on a seat back,
In the cushion portion, a portion on the outer side in the seat width direction than the pressure sensor extends in the height direction of the seat back, and a hanging groove is formed in which the outer portion in the seat width direction in the seat skin is suspended.
The suppression portion is an opening formed in the cushion portion between the pressure sensor and the suspension groove.
The vehicle seat according to any one of claims 1 to 3. The cushion portion is provided on a seat back,
A suspension groove extending in the height direction of the seat back is formed in a portion of the cushion portion on the outer side in the seat width direction than the pressure sensor,
The seat width direction outer side portion of the seat skin is suspended in the suspension groove by a suspension wire extending in the height direction of the seat back and housed in the suspension groove,
The suppression portion is formed in the hanging wire at a position corresponding to the pressure sensor in the height direction of the seat back, and is a concave portion that is recessed toward the front side of the seat back.
The vehicle seat according to any one of claims 1 to 3. A bent portion that is bent toward the front side of the seat back is formed at the longitudinal end of the hanging wire,
The projecting dimension of the concave part from the general part of the hanging wire is set to be smaller than the projecting dimension of the bent part from the general part of the hanging wire.
The vehicle seat according to claim 5. A suspension groove extending in the height direction of the seat back is formed in a portion of the cushion portion on the outer side in the seat width direction than the pressure sensor,
The seat width direction outer side portion of the seat skin is suspended in the suspension groove by a suspension fastener that extends in the height direction of the seat back and is accommodated in the suspension groove,
The suppression portion is a break portion formed in a part of the hanging fastener at a position corresponding to the pressure sensor in the height direction of the seat back.
The vehicle seat according to claim 2 or claim 3 .

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