JP2014159208A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vehicle seat which secures air permeability on a contact surface contacting with a seating occupant and adjusts the seating occupant support strength.SOLUTION: A vehicle seat 10 includes: a seat cushion 12 which supports a hip part and a thigh part of a seating occupant; and a seat back 14 which supports a rear surface of the seating occupant. A bladder 50, which expands or contracts in a thickness direction of the seat back 14 (a seating occupant support direction) and thereby adjusts the seating occupant support strengh, is provided in the seat back 14. An air passage 62, which allows the seating occupant side and the side separating from the seating occupant side to communicate with each other, is provided at the bladder 50.

Description

  The present invention relates to a vehicle seat.

  Patent Document 1 below discloses a vehicle seat that improves the comfort of a seated occupant by providing air permeability to the surfaces of a seat back and a seat cushion. In this vehicle seat, a ventilation insert that forms a ventilation layer in the seat cushion (seat back) is provided between the seat back pad (seat cushion pad) and the skin. The ventilation insert is provided with a ventilation duct and a ventilation device (such as a blower) for circulating the air inside the insert body and the air outside the insert.

  Patent Document 2 below discloses a vehicle seat having a seat back capable of adjusting the support strength (cushioning property) of the back of a seated occupant. In this vehicle seat, an air bag is provided on the seat back side of the seat back pad, and the support strength of the back of the seated occupant is adjusted by inflating or contracting the air bag.

JP 2012-228333 A JP 7-313293 A

  However, in the techniques described in Patent Document 1 and Patent Document 2, it is considered that both the air permeability at the contact surface with the seated occupant and the adjustment of the support strength of the seated occupant are compatible. Not.

  In view of the above facts, an object of the present invention is to obtain a vehicle seat capable of ensuring air permeability at a contact surface with a seated occupant and adjusting the support strength of the seated occupant.

  A vehicle seat according to a first aspect of the present invention is a seat cushion that supports a hip and a thigh of a seated occupant, a seat back that supports a back of the seated occupant, and at least one of the seat cushion and the seat back. And an air bag having an air passage that adjusts the support strength of the seated occupant by inflating or contracting in the support direction of the seated occupant, and communicates the seated occupant side with the side away from the seated occupant And.

  In the first aspect of the present invention, when the air bag is provided inside the seat cushion, when the air pressure in the air bag increases, the air bag expands in the thickness direction of the seat cushion (up and down direction of the seat). When the pressure of the air in the air bag decreases, the air bag contracts in the thickness direction of the seat cushion (the seat vertical direction). Thereby, the support strength of the buttocks and thighs of the seated occupant is adjusted. In the present invention, since the air bag is provided with an air passage that communicates between the seated occupant side and the side away from the seated occupant, the air on the buttocks and thighs of the seated occupant flows out to the lower side of the seat Alternatively, the air below the seat can be allowed to flow into the buttocks and thighs of the seated occupant.

  When the air bag is provided inside the seat back, when the pressure of the air in the air bag increases, the air bag expands in the thickness direction of the seat back (front-rear direction), and the air in the air bag When the pressure decreases, the air bag contracts in the thickness direction of the seat back (the front-rear direction of the seat). Thereby, the support strength of the back of the seated occupant is adjusted. In the present invention, the air bag is provided with an air passage that communicates the seated occupant side and the side away from the seated occupant, so that the air on the back side of the seated occupant flows out to the seat rear side, or It becomes possible to allow the air behind the seat to flow into the back side of the seated occupant.

  A vehicle seat according to a second aspect of the present invention is the vehicle seat according to the first aspect, wherein the air bag is a seat lower side of a seat cushion pad constituting a part of the seat cushion or the seat back. It is arranged on the seat back side of a seat back pad that constitutes a part, and the air bag projects toward the seat cushion pad or the seat back pad side, and the tip in the projecting direction is the seat cushion pad or A protrusion is provided that suppresses the air flowing through the air passage from entering between the seat cushion pad or the seat back pad and the air bag by contacting the seat back pad.

  In the present invention described in claim 2, there is provided a protruding portion for suppressing the air flowing through the air passage from entering between the seat cushion pad or the seat back pad and the air bag. Therefore, the distribution performance of the air on the side of the seated occupant and the air on the side away from the seated occupant is stabilized.

  A vehicle seat according to a third aspect of the present invention is the vehicle seat according to the second aspect, wherein the seat cushion or the seat back includes a plate member that supports a load input from a seated occupant. The air bag is provided between the plate member and the seat cushion or the seat back, and the air bag protrudes toward the plate member and has a leading end in the protruding direction on the plate member. A protrusion is provided that suppresses the air flowing through the air passage from entering between the plate member and the air bag by contacting.

  In this invention of Claim 3, the protrusion part which suppresses that the air which distribute | circulates the inside of an air passage penetrate | invades between a panel member and an air bag is provided. For this reason, the distribution performance of the air on the side of the seated occupant and the air on the side away from the seated occupant is further stabilized.

  The vehicle seat according to the first aspect of the present invention has an excellent effect of ensuring air permeability at the contact surface with the seated occupant and adjusting the support strength of the seated occupant.

  The vehicle seat according to the second aspect of the present invention has an excellent effect that the air permeability on the contact surface with the seated occupant can be stabilized.

  The vehicle seat according to the third aspect of the present invention has an excellent effect that the air permeability on the contact surface with the seated occupant can be stabilized.

It is the perspective view which looked at the vehicle seat which concerns on 1st Embodiment from the seat diagonally forward side. It is an expanded sectional view which expands and shows the cross section of the seat back cut | disconnected along 2-2 line shown by FIG. It is an expanded sectional view which expands and shows the cross section of the seat back cut | disconnected along 3-3 line shown by FIG. (A) And (B) is an expanded sectional view which expands and shows the shrink | contracted bladder. It is an expanded sectional view corresponding to Drawing 3 showing the section of the seat back of the vehicular seat concerning a 2nd embodiment. It is sectional drawing which shows the bladder which concerns on a modification. (A) And (B) is an expanded sectional view which expands and shows the bladder which concerns on the contracted modification.

  Next, the vehicle seat according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the following description, the front / rear / left / right / up / down directions will be described, and the front / rear / left / right / up / down directions viewed from the occupant seated on the vehicle seat will be indicated. The arrow UP indicates the upward direction, the arrow RH indicates the right direction, and the arrow LH indicates the left direction.

  As shown in FIG. 1, a vehicle seat 10 according to the present embodiment includes a seat cushion 12 that supports a hip and a thigh of a seated occupant, a seat back 14 that supports a back of the seated occupant, and a head of the seated occupant. And a headrest 16 that supports the portion.

  The seat cushion 12 includes a pair of side frames 18 that extend in the front-rear direction of the seat and are disposed on both the left and right sides in the seat width direction. The seat cushion 12 includes a cushion pan 20 as a panel member that connects the left and right side frames 18 in the seat width direction and extends in the seat front-rear direction. A seat cushion frame 22 is configured by the side frame 18 and the cushion pan 20, and the seat cushion 12 is configured by attaching a seat cushion pad 26 covered with a skin material 24 to the seat cushion frame 22.

  The headrest 16 is configured by attaching a headrest pad covered with a skin material to a U-shaped headrest stay (not shown) that is open toward the lower side of the seat when viewed from the front of the seat. The headrest 16 is supported by an upper end portion of a seat back 14 described in detail later so as to be vertically adjustable.

  Next, the configuration of the seat back 14 that is a main part of the present embodiment will be described.

  The seat back 14 includes a pair of side frames 28 provided on the left and right sides in the seat width direction, and an upper frame 30 that connects the upper ends of the pair of side frames 28 in the seat width direction. The seat back 14 includes a lumbar plate 32 as a panel member that connects the left and right side frames 28 in the seat width direction and extends in the seat vertical direction. As shown in FIG. 2, a circular opening 34 is formed in the lower portion of the lumbar plate 32 in the seat width direction, and this opening 34 is coaxial with an air passage 62 of a bladder 50 described later. Has been placed. A blower 36 is provided on the rear side of the opening 34, and the blower 36 is fixed to the lumbar plate 32. As shown in FIG. 1, the seat back frame 38 includes the side frame 28, the upper frame 30, and the lumbar plate 32 described above. The seat back frame 38 is supported at the rear end portion of the seat cushion frame 22 so as to be tiltable.

  As shown in FIGS. 2 and 3, a seat back pad 40 made of urethane foam or the like is provided on the front side of the seat back frame 38. The seat back pad 40 includes a main cushion portion 42 that extends in the seat vertical direction with the seat longitudinal direction as the thickness direction. A recess 44 that is recessed toward the front side of the seat is formed at an intermediate portion in the seat width direction at the rear portion of the main cushion portion 42. The recess 44 is arranged coaxially with an air passage 62 of the bladder 50 described later. Further, the main cushion portion 42 is formed with a communication duct portion 45 that communicates the seat front side of the main cushion portion 42 with the recess 44. The seat back pad 40 includes side support portions 46 that are disposed on both sides of the main cushion portion 42 in the seat width direction and project to the front side of the seat. The above-described surface of the seat back pad 40 on the front side of the seat is covered with a skin material 48 having air permeability (for example, subjected to punching or the like), and the seat back pad 40 covered with the skin material 48. Is fixed to the seat back frame 38.

  As shown in FIG. 1, a bladder 50 as an air bag is provided between the seat back pad 40 and the lumbar plate 32 and at a portion facing the waist of the seated occupant. The bladder 50 is formed by using, for example, butyl rubber, polyvinyl chloride or the like, and the compressed air flows into the bladder 50 or the compressed air inside the bladder 50 flows out (seat back and forth). It is possible to expand or contract in the direction in which the passenger is supported. Specifically, as shown in FIGS. 2 and 3, the bladder 50 includes a front wall portion 52 that is formed in a rectangular shape when viewed from the front of the seat and extends in the seat width direction and the up-down direction. A circular opening 54 is formed in an intermediate portion of the front wall portion 52 in the sheet width direction and the vertical direction. The bladder 50 is disposed on the seat rear side of the front wall portion 52 and includes a rear wall portion 56 having the same configuration as the front wall portion 52. The outer peripheral portion of the rear wall portion 56 and the outer peripheral portion of the front wall portion 52 are sewn or joined using an adhesive or the like. The bladder 50 also includes a cylindrical passage wall 60 that connects the inner peripheral edge of the opening 54 formed in the front wall 52 and the inner peripheral edge of the opening 58 formed in the rear wall 56. The radially inner side of the passage wall portion 60 is an air passage 62 that communicates the seat occupant side (seat front side) and the side away from the seat occupant (seat rear side). As shown in FIGS. 4A and 4B, when the bladder 50 contracts, the passage wall portion 60 is folded in a bellows shape, so that the opening area of the air passage 62 is secured.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 1, when an occupant sits on the vehicle seat 10 of the present embodiment, the occupant's buttocks and thighs are supported by a seat cushion 12, and the occupant's back is supported by a seat back 14. The

  In addition, when a passenger (not shown) operates and the pressure in the bladder 50 increases when the occupant is seated on the vehicle seat 10, the bladder 50 expands in the thickness direction of the seat back 14 (seat front-rear direction). When the pressure of the air in the bladder 50 is lowered, for example, by opening a relief valve that is not to be opened, the bladder 50 contracts in the thickness direction of the seat back 14 (the seat longitudinal direction). Thereby, the support strength of the back of the seated occupant by the seat back 14 is adjusted.

  When the blower 36 is operated, as shown in FIGS. 2 and 3, the air in the vicinity of the contact surface with the seated occupant (skin material 48) is connected to the communication duct portion 45 and the bladder 50 formed in the seat back pad 40. It flows out to the rear side of the seat back 14 through the air passage 62 provided in the seat. Further, when the blower 36 is rotated in the reverse direction, the air on the rear side of the seat back 14 flows between the seated occupant and the skin material 48 through the air passage 62 and the communication duct portion 45. Thereby, it is suppressed that the humidity of the contact part of a seated crew member's back part and the skin material 48 raises, and the comfort of a seated crew member improves.

  As described above, in the present embodiment, air permeability at the contact surface with the back of the seated occupant can be ensured and the support strength of the back of the seated occupant can be adjusted.

  In the present embodiment, the configuration in which the bladder 50 is provided in the seat back 14 has been described, but the present invention is not limited to this. For example, a bladder may be provided between the seat cushion pad 26 and the cushion pan 20 in the seat cushion 12. In this case, air permeability at the contact surface between the seated occupant's buttocks and thighs can be secured, and the support strength of the seated occupant's buttocks and thighs can be adjusted.

(Second Embodiment)
Next, a vehicle seat 64 according to a second embodiment of the present invention will be described with reference to FIG. Note that components and parts that are basically the same as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment, and description thereof is omitted.

  As shown in FIG. 5, the vehicle seat 64 according to the present embodiment includes protrusions 66 and 68 that protrude toward the seat back pad 40 on the front wall 52 of the bladder 50 and a lumbar plate. The protrusions 70 and 72 projecting toward the 32 side are characterized by being provided on the rear wall portion 56 of the bladder 50.

  The protrusion 66 provided on the front wall 52 of the bladder 50 is formed in a ring shape surrounding the opening 54 formed in the front wall 52 in a front view of the seat, and the protrusion 68 is formed from the protrusion 66. Is also formed in a ring shape arranged on the outer peripheral side. When the leading ends of the projections 66 and 68 abut against the seat back pad 40, the air flowing through the air passage 62 is prevented from entering between the seat back pad 40 and the front wall 52 of the bladder 50. This is a configuration.

  The configuration of the protrusions 70 and 72 provided on the rear wall portion 56 of the bladder 50 is the same as that of the protrusions 66 and 68 provided on the front wall portion 52. That is, the air flowing through the air passage 62 is caused by the tips of the projections 70 and 72 provided on the rear wall portion 56 of the bladder 50 coming into contact with the lumbar plate 32. Intrusion between the two is suppressed.

  In the vehicle seat 64 according to the present embodiment described above, since the air in the air passage 62 is suppressed from entering the aforementioned portion, the air circulation performance through the air passage 62 can be stabilized. .

  In addition, although this embodiment has demonstrated the structure which provided the projection parts 66 and 68 and the projection parts 70 and 72 in the front wall part 52 and the rear wall part 56 of the bladder 50, respectively, this invention is not limited to this, For example, it is good also as a structure which provided the projection part in either the front wall part 52 or the rear wall part 56 of the bladder 50. FIG.

  In the first and second embodiments described above, an example in which the outer peripheral portion of the front wall portion 52 of the bladder 50 and the outer peripheral portion of the rear wall portion 56 of the bladder 50 are joined has been described. As shown in FIGS. 7A and 7B, the outer peripheral portion of the front wall portion 52 and the outer peripheral portion of the rear wall portion 56 may be joined via an outer wall portion 74. The outer wall portion 74 can be expanded and contracted in the front-rear direction of the seat by being folded in a bellows shape like the passage wall portion 60. As described above, whether or not the outer wall portion 74 is provided between the outer peripheral portion of the front wall portion 52 and the outer peripheral portion of the rear wall portion 56 is appropriately determined in consideration of the contact pressure between the back of the seated occupant and the skin material, You only have to set it.

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

10 Vehicle seat
12 Seat cushion
14 Seat back
20 Cushion pan (panel member)
26 Seat cushion pad
32 Lumber plate (panel member)
40 Seat back pad
50 bladder
62 Air passage
64 Vehicle seat
66 Protrusion
68 Projection
70 Protrusion
72 Protrusion

Claims (3)

A seat cushion that supports the buttocks and thighs of the seated occupant;
A seat back that supports the back of the seated passenger;
Provided inside at least one of the seat cushion and the seat back, and adjusts the support strength of the seated occupant by inflating or contracting in the seat occupant support direction, and separating the seated occupant from the seated occupant An air bag having an air passage communicating with the air bag;
Vehicle seat equipped with The air bag is disposed on a seat lower side of a seat cushion pad constituting a part of the seat cushion or a seat rear side of a seat back pad constituting a part of the seat back,
The air bag projects air toward the seat cushion pad or the seat back pad, and the air flowing through the air passage is formed by a tip portion in the projecting direction coming into contact with the seat cushion pad or the seat back pad. The vehicle seat according to claim 1, wherein a protrusion is provided to prevent intrusion between the seat cushion pad or the seat back pad and the air bag. The seat cushion or the seat back includes a plate member that supports a load input from a seated occupant, and the air bag is provided between the plate member and the seat cushion or the seat back. ,
The air bag protrudes toward the plate member side, and the air flowing through the air passage enters between the plate member and the air bag by the tip end portion in the protruding direction coming into contact with the plate member. The vehicle seat according to claim 2, further comprising a protrusion that prevents the protrusion.

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