JP2017047871A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular seat capable of being deformed according to the physical constitution and preference of a seated occupant.SOLUTION: In the vehicular seat, by an expansion and contraction of adjustment air bags 40A, 40B, both end parts in a seat width direction of a body part 20 (urethane pad 24), which is supported by a net spring 30, are deformed in a seat forward-backward direction by the rotations of support plates 38A, 38B. Therefore, according to the physical constitution and preference of a seated occupant, the seated occupant's fitting feeling to his/her back part can be improved by deforming both end parts in the seat width direction of the body part 20 in a seat back 16.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle seat.

  Conventionally, a seat back for a vehicle seat is provided with a main body part that supports the back of a seated occupant from the rear of the vehicle and on both sides in the seat width direction of the main body part, and is disposed so as to protrude forward of the vehicle from the main body part. And a side support portion for supporting the upper body of the seated occupant from the side.

  Patent Document 1 below describes a vehicle seat in which a side support portion of a seat back is moved substantially in the vehicle front-rear direction by expansion and contraction of an adjustment air bag, and supports the occupant according to the physique and preference of the occupant. . The mechanism includes a first plate provided in a side support portion of the seat back, a second plate rotatably connected to the first plate via a hinge, and the first and second plates. And an air bag interposed therebetween. As the air bag expands and contracts, the first plate moves to bring the side support portion closer to or away from the seated occupant. Thus, it is described that the holdability of the vehicle seat is improved according to the body shape and preference of the seated occupant.

JP 2014-148235 A

  However, in the above vehicle seat, the side support portion is deformed in the seat width direction of the seat back, but the main body portion is not deformed. Therefore, there is room for improvement in order to enable the deformation corresponding to the size of the seated occupant, particularly the back, in the seat width direction of the seat back.

  In view of the above facts, an object of the present invention is to obtain a vehicle seat having a seat back that can be deformed in accordance with the size and preference of a seated occupant.

  The vehicle seat according to the first aspect of the present invention is provided separately from the main body on the main body of the seat back that supports the back of the seated occupant from the rear of the seat and on both sides of the main body in the seat width direction. The side support part of the seat back that supports the upper body of the seated occupant from the side by being arranged to protrude to the front side of the seat from the main body part, and the both ends in the seat width direction of the main body part are pressed and deformed to the front side of the seat A seat back shape adjusting device.

  In this vehicle seat, when both end portions in the seat width direction of the main body portion are pressed and deformed to the front side of the seat by the seat back shape adjusting device, both ends in the seat width direction of the main body portion are provided at both rear end portions of the upper body of the small seated occupant. The parts approach and support the back of the seated occupant well. On the other hand, when both end portions in the seat width direction of the main body are deformed to the rear side of the seat by reducing the amount of pressing deformation to the front of the seat against both ends in the seat width direction of the main body by the seat back shape adjusting device, Both end portions in the seat width direction of the main body approach the both ends of the back of the upper body of the seated occupant, and favorably support the both ends of the back of the upper body of the seated occupant. Since the main body portion and the side support portion are separated from each other, both end portions in the seat width direction of the main body portion can be easily deformed in the seat front-rear direction. Thus, the seat width direction both ends of the main body portion of the seat back can be deformed in the front-rear direction of the seat corresponding to the shape of the back of the seated occupant, thereby improving the fit of the seated occupant with the back.

  As described above, in the vehicle seat according to the present invention, the seat back is deformed according to the physique and preference of the seated occupant by adjusting the deformation amount in the seat front-rear direction at both ends in the seat width direction of the main body. be able to.

1 is a perspective view of a vehicle seat according to an embodiment of the present invention. It is the sectional view on the AA line of FIG. 1 which shows the state which the air bag for adjustment shrunk. It is sectional drawing corresponding to FIG. 2 which shows the state which the air bag for adjustment expanded.

(Configuration) Hereinafter, the vehicle seat 10 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 3. In addition, arrow FR, arrow UP, and arrow W which are appropriately shown in the drawings respectively indicate the front direction, the upper direction, and the width direction (left-right direction) of the vehicle seat 10.

(Constitution)
As shown in FIG. 1, the vehicle seat 10 according to the present embodiment includes a seat body 12. The seat body 12 is connected to the seat cushion 14 on which the occupant is seated, the seat back 16 that supports the back of the seat occupant, and the upper end of the seat back 16. It is comprised by the headrest 18 which supports a head.

  As shown in FIG. 2, the seat back 16 includes a main body 20 that supports the back of the seated occupant from the rear side of the seat, and a pair of left and right side support portions 22A and 22B provided on both sides of the main body 20 in the seat width direction. And.

  Since the seat back 16 is configured symmetrically, the right part of the seat back 16 will be described below, and the description of the left part of the seat back 16 will be omitted.

  The side support portion 22A is provided on one end side of the main body portion 20 in the sheet width direction. As shown in FIG. 2, a gap 21 </ b> A is formed between the main body portion 20 and the side support portion 22 </ b> A, and the side support portion 22 </ b> A is separated from the main body portion 20. Further, the side support portion 22A protrudes forward of the seat from the main body portion 20, and is configured to support the upper body (from the shoulder portion to the waist portion) of the seated occupant from the side. Further, the side support portion 22A includes a urethane pad 24 that is a cushion material. The urethane pad 24 is covered with a skin material 26 made of fabric, leather, synthetic leather, or the like.

  On the other hand, the main body 20 also includes a urethane pad 24 that is a cushion material and a skin material 26 that covers the urethane pad 24, similarly to the side support portion 22 </ b> A. As shown in FIG. 2, the back side of the urethane pad 24 of the main body 20 is supported by a net spring 30 having both ends fixed to side back frame members 28A and 28B extending in the seat vertical direction.

  The net springs 30 are belt-shaped having a constant width in the seat height direction, and are provided at three locations (three stages) at a predetermined interval. The net spring 30 is stretched between the side back frame members 28A and 28B with a predetermined tension, and has flexibility.

  The seat rear side of the net spring 30 is covered with a resin back board 32, and the seat rear side and the sheet width direction end portion side of the side back frame member 28A are covered with a resin side back board 34A. ing.

  A seat back shape adjusting device 36A is provided on the rear side (inside) of the seat width direction end of each net spring 30 provided in three stages. The seat back shape adjusting device 36A includes a support plate 38A for supporting the net spring, an adjustment air bag 40A for displacing the support plate 38A, and air supplied to the adjustment air bag 40A or air from the adjustment air bag 40A. And an air supply / discharge device 42 for discharging the air.

  The support plate 38 </ b> A is disposed on the seat rear side of the end portion in the seat width direction of the net spring 30. The seat rear side end of the support plate 38A is fixed to a hinge 44A provided on the side back board 34A, and is rotatable in the directions of arrows A1 (see FIG. 2) and A2 (see FIG. 3) around the hinge 44A. It is said that. In addition, the seat front side end portion of the support plate 38 </ b> A is in contact with the net spring 30.

  The adjustment air bag 40A is formed in a bag shape by sewing a sheet-like material such as a cloth material. The adjustment air bag 40A has one end fixed to the side surface of an air duct 46A extending in the vertical direction of the seat and the other end fixed to the support plate 38A. In addition, air is supplied to or discharged from the inside by an air supply / discharge device 42 described later. Further, the support plate 38A is rotated about the hinge 44A in the directions of arrows A1 and A2 by the expansion and contraction of the adjustment air bladder 40A. At this time, the seat front side end portion of the support plate 38 </ b> A is disposed so as to maintain a state in which it is always in contact with the net spring 30.

  The air supply / discharge device 42 includes an air supply source 48, an air supply tube 50 that allows the air supply source 48 and the adjustment air bag 40A to communicate with each other, and an adjustment air bag 40A and an air provided on the air supply tube 50. A switching valve 52 for switching communication with the supply source 48 or the outside, and an exhaust tube 54 communicating with the outside from the switching valve 52 are provided. In the air supply / discharge device 42, the air supply source 48 and the switching valve 52 are controlled by an occupant operating an operation switch provided on the seat, and air is supplied to the adjustment air bag 40A or adjustment air. Air is discharged from the bag 40A.

  The air supply / discharge device 42 is also configured to supply air to the adjustment air bag 40B or to discharge air from the adjustment air bag 40B.

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

  In the vehicle seat 10, when the operation switch is operated to one side, the switching valve 52 of the air supply / discharge device 42 is switched, and the air supply source 48 and the adjustment air bag 40 </ b> A are communicated. In this state, air is supplied from the air supply source 48 to the adjustment air bladder 40A through the air supply tube 50, and the adjustment air bladder 40A is inflated. The support plate 38A is pressed by the expansion of the adjustment air bladder 40A, and the support plate 38A rotates around the hinge 44A in the direction of the arrow A1 and is separated from the air duct 46A. As a result, the front end of the support plate 38A presses the end of the net spring 30 in the sheet width direction and displaces it to the front side of the sheet (see the arrow B1 direction in FIG. 2). As a result, as shown in FIG. 3, both end portions in the seat width direction of the main body portion 20 (urethane pad 24) supported by the net spring 30 are displaced to the seat front side. Therefore, when an occupant having a relatively small physique of the upper body is seated, the main body 20 (both ends in the seat width direction) approaches the back surface 60A of the seated occupant, and the fit of the seated occupant by the main body 20 improves.

  On the other hand, when the operation switch is operated to the other side, the switching valve 52 of the air supply / discharge device 42 is switched, and the adjustment air bag 40A and the outside are communicated with each other via the air supply tube 50 and the exhaust tube 54. The As a result, air is discharged from the adjustment air bag 40A to the outside, and the adjustment air bag 40A contracts. As a result, the support plate 38A pressed by the net spring 30 rotates in the arrow A2 direction (see FIG. 3) about the hinge 44A and approaches the air duct 46A. As a result, the end portion in the seat width direction of the net spring 30 supported by the support plate 38A is displaced to the seat rear side (refer to the arrow B2 direction in FIG. 3). That is, both end portions in the seat width direction of the main body portion 20 (urethane pad 24) supported by the net spring 30 are displaced to the seat rear side (see the arrow B2 direction in FIG. 3). Therefore, as shown in FIG. 2, when an occupant with a relatively large upper body is seated, the main body 20 (both ends in the seat width direction) approaches the back surface 60B of the seated occupant, and the main body 20 This improves the fit of the seated crew.

  As described above, in the vehicle seat 10 according to the present embodiment, the seat width direction both ends of the main body portion 20 (urethane pad 24) of the seat back 16 are in the seat front-rear direction (arrow B1) by the expansion / contraction of the adjustment air bag 40A. , B2 direction). Accordingly, the seat width direction both ends of the main body portion 20 (urethane pad 24) of the seat back 16 can be adjusted in the front-rear direction of the seat according to the physique (rear shape) and preference of the seated occupant. The feeling of fitting can be improved.

  In particular, by adjusting the amount of inflation of the adjustment air bag 40A, the end in the seat width direction of the main body 20 can be adjusted steplessly in the front-rear direction of the seat, so that it is possible to cope with the physique of the back of the seated occupant. .

  Further, since the main body 20 and the side support 22A are separated (the urethane 24 and the skin material 26 are not continuous), the end in the seat width direction of the main body 20 can be easily deformed in the seat front-rear direction.

  Further, net springs 30 for supporting the main body 20 (urethane pad 24) of the seat back 16 are provided at three places (three levels) in the seat height direction, and seat back shape adjusting devices 36A and 36B are provided respectively. Therefore, the deformation state of each urethane pad 24 can be adjusted in the seat height direction, and it is possible to deal with the physique and preference of the seated occupant more precisely.

  In the present embodiment, air is supplied to or discharged from the right and left adjustment air bladders 40A and 40B by one air supply / exhaust device 42, but air is supplied and exhausted independently. It is good also as composition to do. In this case, the shape of the main body 20 (urethane pad 24) can be changed independently on the left and right.

  Moreover, in this embodiment, in order to deform | transform the shape of the sheet | seat width direction both ends of the main-body part 20 (urethane pad 24), it performed by inflating and shrink | contracting the adjustment air bags 40A and 40B. For example, the structure which rotates support plate 38A, 38B with a motor etc. may be sufficient.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 16 Seat back 20 Main-body part 22A, 22B Side support part 36A, 36B Seat back shape adjustment apparatus

Claims (1)

A seat back body that supports the back of the seated occupant from behind the seat;
A seat back side support that is provided separately from the main body portion on both sides in the seat width direction of the main body portion and projects from the front side of the seat to the front side of the seat occupant to support the upper body of the seated occupant from the side. And
A seat back shape adjusting device for pressing and deforming both ends of the main body in the seat width direction toward the front side of the seat;
Vehicle seat equipped with

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