JP2021193017A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat which can preferably support an occupant.SOLUTION: The vehicular seat includes: a seat part having a seating part and a seat back; and an airbag 31L which is provided in the seat part and expands or contracts to change an occupant support position. The seat part includes: left and right elongated side frames 51 forming left and right frames; and a plate member 8 disposed between the airbag 31L and the side frame 51. The plate member 8 has: a first portion (a rear part of a body part 81) having a first support surface; and a second portion (a front part of the body part 81) which extends from the first portion to the occupant side in a short side direction of the side frame 51 which is orthogonal to a lateral direction. The second portion has a second support surface extending from the first support surface and inclining so as to be located at the outer side relative to the first support surface in the lateral direction toward a direction away from the first support surface. When the airbag 31L is expanded, the airbag 31L is supported by the first support surface and the second support surface.SELECTED DRAWING: Figure 15

Description

The present invention relates to a vehicle seat provided with an air bag that changes the support position of an occupant by expanding or contracting.

Conventionally, there has been known a vehicle seat provided with a support device capable of adjusting the support position of the waist of an occupant by adjusting the air pressure of an air bag provided inside the seat (Patent Document 1). reference). In the seat of Patent Document 1, a pump for supplying air to the air bag is provided under the seat cushion portion.

Japanese Unexamined Patent Publication No. 2010-23521

By the way, in a vehicle seat in which the support position of the occupant can be adjusted, it is desirable that the occupant can be suitably supported.

Therefore, an object of the present invention is to provide a vehicle seat capable of suitably supporting an occupant.

In order to achieve the above-mentioned object, the vehicle seat includes a seat portion having a seat portion and a seat back, and an air bag provided in the seat portion and changing the support position of the occupant by expanding or contracting. A vehicle seat, wherein the seat portion includes long left and right side frames constituting the left and right frames, and a plate member arranged between the air bag and the side frames. The plate member includes a first portion having a first support surface, a second support surface extending from the first support surface, and a second portion having a second support surface inclined with respect to the first support surface. The air bag is supported by the first support surface and the second support surface when the air bag expands.
In the vehicle seat described above, the second portion may have a claw portion for fixing the plate member to the side frame.
In the vehicle seat described above, the second portion may have a through hole formed at a position facing the claw portion.
In the vehicle seat described above, the claw portion has a first claw portion and a second claw portion that are hooked on a rod member fixed to the side frame, and the first claw portion and the second claw portion are The rod members can be hooked in different directions.
In the vehicle seat described above, the first portion may be configured to have an engaging hole for attaching the air bag.
In the vehicle seat described above, the first claw portion and the second claw portion are provided at intervals in the longitudinal direction of the side frame, and the engagement holes are provided at intervals in the longitudinal direction. It has a first engaging hole and a second engaging hole, and the distance between the first engaging hole and the second engaging hole is the distance between the first claw portion and the second claw portion. The configuration can be longer than the distance between them.
In the vehicle seat described above, the claw portion may be configured to be located outside the engaging hole in the left-right direction.
In the vehicle seat described above, the second portion may have a portion having a size smaller than that of the first portion in the longitudinal direction of the side frame.
In the vehicle seat described above, the first portion has an engaging hole for attaching the air bag and a frame fixing portion for fixing the plate member to the side frame, and the engaging hole has the engaging hole. The side frame has a first engaging hole and a second engaging hole provided at intervals in the longitudinal direction, and the frame fixing portion has the first engaging hole and the second engaging hole. It can be configured to be provided between.
Further, the vehicle seat is a vehicle seat provided with a seat portion having a seating portion and a seat back, and an air bag provided in the seat portion and changing the support position of an occupant by expanding or contracting. The seat portion includes long left and right side frames constituting the left and right frames, and the air bag is fixed to the side frame via a plate member and along the longitudinal direction of the side frame. The first air bag includes a first air bag having a recess formed at an end thereof, the first air bag has a mounting portion fixed to the plate member, and the mounting portion is formed so as to be separated in the longitudinal direction. The vehicle seat has a first mounting portion and a second mounting portion, the vehicle seat is connected to the first air bag, and further includes a hose for supplying gas to the first air bag, and the recess is described as described above. The connecting portion between the first air bag and the hose is provided at a position different from the connecting portion between the first air bag and the hose in the longitudinal direction, and the connecting portion between the first air bag and the hose is the first mounting portion and the first mounting portion in the longitudinal direction. 2 It is characterized by being located between the mounting portions.
In the vehicle seat described above, the first air bag may be configured such that the mounting portion is fixed by a clip.
In the vehicle seat described above, the recess may be provided between the first mounting portion and the second mounting portion in the longitudinal direction.
In the vehicle seat described above, the first mounting portion and the second mounting portion may be configured to be formed on the side of the first air bag on which the recess is formed.
In the vehicle seat described above, the recess may be provided in front of the mounting portion.
In the vehicle seat described above, the mounting portion may be configured to include a mounting portion formed at the lower end of the first air bag.
The vehicle seat described above may include a pressure receiving member arranged between the left and right side frames, and the recess may be provided at a position overlapping the pressure receiving member in the longitudinal direction.
In the vehicle seat described above, the air bag may be configured to include a second air bag attached to the pressure receiving member.
In the vehicle seat described above, the first air bag may be arranged so as to overlap the side frame when viewed from the left-right direction.
Further, the vehicle seat is a vehicle seat provided with a seat portion having a seat portion and a seat back, and a support device provided in the seat portion that can adjust the support position of the waist portion of the occupant. The support device is configured with the left and right seating side frames constituting the left and right frames of the portion, a connecting member extending in the left-right direction to connect the left and right seating portion side frames, and the support device by expanding or contracting. It comprises an air bag for repositioning, a pump for supplying gas to the air bag, and a bracket extending in the left-right direction for attaching the pump to the connecting member, and the bracket is recessed from bottom to top. The pump is attached to the bracket with the central axis line above the lower end of the recess of the bracket, and the connecting member is recessed from bottom to top. It has a recess, and the bracket is attached to the connecting member in a state of being inserted into the recess of the connecting member.

According to such a configuration, since the connecting member and the bracket have an uneven shape as a whole, the rigidity of the connecting member and the bracket can be improved. This makes it possible to improve the mounting rigidity of the pump.

In the vehicle seat described above, the pump may be configured such that the pump is arranged so that the gas outlet is inserted above the lower end of the recess of the bracket.
In the vehicle seat described above, the pump may be arranged so as to be completely inserted above the lower end of the recess of the bracket.

In the vehicle seat described above, the bracket is attached to the connecting member in a state where the convex portion formed on the back side of the concave portion of the bracket is inserted into the concave portion of the connecting member, and the bracket is attached to the bottom wall of the concave portion of the bracket. The length in the left-right direction can be longer than the length in the left-right direction of the wall extending outward in the left-right direction from the opening edge of the recess of the bracket.
In the vehicle seat described above, the pump may be arranged between a pair of walls facing each other in the front-rear direction to form a recess of the connecting member.

The vehicle seat described above includes a submarine regulating member provided between the left and right seating portion side frames, and the submarine regulating member is arranged in a state of being inserted into a recess of the connecting member. Can be done.
In the vehicle seat described above, the pump may be configured to be arranged in front of the submarine regulating member.
In the vehicle seat described above, the pump may be configured to be arranged in parallel with a portion extending in the left-right direction of the submarine regulating member.

In the vehicle seat described above, the pump may be configured such that the central axis is arranged in a recessed portion of the connecting member.
In the vehicle seat described above, in the pump, one end in the longitudinal direction in which a gas outlet is not provided is arranged near the left and right end between the left and right seating portion side frames, and the gas outlet is provided. The other end in the longitudinal direction may be provided so as to be arranged closer to the center in the left-right direction between the left and right seating portions side frames.

According to the present invention, the occupant can be suitably supported.

It is a perspective view of the vehicle seat which concerns on embodiment of this invention. It is a schematic diagram of a support device. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is the figure which looked at the pan frame from the bottom. FIG. 4 is a cross-sectional view taken along the line BB of FIG. It is the figure (a) which looked at the seat back frame from the front, and the CC sectional view (b) of (a). It is a perspective view of a pressure receiving member and a seat back side frame seen from diagonally right front. It is the figure which looked at the pressure receiving member and the seat back side frame from the rear. FIG. 7 is a cross-sectional view taken along the line DD of FIG. It is the figure which looked at the left seat back side frame and the side bracket from the inside in the left-right direction. It is a front view of the seat back frame, the air bag arranged behind the occupant, and the pressure receiving member. It is the front view (a) of the front side air bag, and the front view (b) of a rear side air bag. It is a perspective view which shows the state which the front side air bag is inflated. It is the figure which looked at the left seat back side frame and the air bag from the inside in the left-right direction. It is a perspective view (a) of the left seat back side frame, a side bracket, a plate member and an air bag, and the figure (b), (c) which shows the claw part of a plate member. It is a top view of the air bag and the plate member arranged on the left side of the occupant, and is a diagram (a) showing a contracted state and a diagram (b) showing an expanded state.

Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the present invention, front and rear, left and right, and up and down are based on the occupant sitting on the seat.

<Outline configuration of vehicle seats>
As shown in FIG. 1, a vehicle seat 1 as an example of a vehicle seat mainly includes a seat portion 2 and a support device 3 (see FIG. 2) provided in the seat portion 2. The seat portion 2 mainly has a seating portion 4 on which an occupant sits, a seat back 5 fixed to the seating portion 4 via a reclining mechanism, and a headrest (not shown).

The seating portion 4 and the seat back 5 are covered with a cushion material made of urethane foam or the like (not shown) and a skin material made of synthetic leather or cloth (not shown) on the outside of the seating portion frame 40 and the seat back frame 50. It is composed of things. Further, as shown in FIGS. 1 and 2, the support device 3 includes four air bags 31A, 31B, 31L, 31R and a pump 32 that supplies air (gas) to the air bags 31A, 31B, 31L, 31R. , A control unit 33 for adjusting the amount of swelling of the air bags 31A, 31B, 31L, 31R, and flexible hoses 34 to 37 are mainly provided.

The air bags 31A and 31B are members that support the waist of the occupant seated on the vehicle seat 1 from the rear, and are arranged between the left and right seat back side frames 51. Further, the air bags 31L and 31R are support members that support the waist of the occupant from the left or right, and are arranged inside the left or right seat back side frame 51, respectively. The control unit 33 is attached to the outer surface of the left seat back side frame 51, and has a valve unit that can be opened and closed, a relief valve, a control board that controls the opening and closing amount of the valve unit, and the like (all not shown). is doing.

The hose 34 connects the pump 32 and the control unit 33, the hose 35 connects the air bag 31A and the control unit 33, and the hose 36 connects the air bag 31B and the control unit 33. Further, one end of the hose 37 is connected to the control unit 33, and the hose 37 is branched in the middle, and each end is connected to the air bag 31L or the air bag 31R. Thereby, in the present embodiment, the swelling amounts of the air bag 31A, the air bag 31B, and the air bags 31L and 31R can be individually adjusted.

In the support device 3, the valve unit of the control unit 33 is normally closed. Then, when the occupant operates the controller (not shown), the valve unit opens, and when air is supplied from the pump 32, the air bags 31A, 31B, 31L, 31R expand and deform, and the valve unit also opens. When pressure is applied to the air bags 31A, 31B, 31L, 31R from the occupant in this state, the air bags 31A, 31B, 31L, 31R contract and deform. This makes it possible to change (adjust) the support position of the occupant's waist. The excess air supplied from the pump 32 to the control unit 33 and the air extruded from the air bags 31A, 31B, 31L, 31R are exhausted to the outside by the relief valve of the control unit 33.

<Detailed configuration of the seat>
As shown in FIG. 1, the seating portion frame 40 includes left and right seating portion side frames 41 constituting the left and right frames of the seating portion 4, a pan frame 42 as a connecting member, and a submarine pipe 43 as a submarine regulating member. (See FIGS. 3 and 4), a rear connecting pipe 44, and a pump mounting bracket 6 as a bracket (see FIGS. 3 to 5) are mainly provided. The seating portion side frame 41 and the pan frame 42 are each formed by pressing a metal plate or the like.

The pan frame 42 is a member that extends in the left-right direction and connects the front portions of the left and right seating portions side frames 41. It is formed. Further, a hook portion 42H is formed on the upper surface of the pan frame 42 (a portion corresponding to the bottom of the recess 42A). A seat spring 45 as a occupant support member for supporting the occupant seated on the seat portion 4 is stretched between the hook portion 42H formed on the pan frame 42 and the rear connecting pipe 44 (see also FIG. 1). ).

The submarine pipe 43 and the rear connecting pipe 44 (see FIG. 1) are metal pipes extending in the left-right direction, and are provided between the left and right seating portion side frames 41, respectively. The submarine pipe 43 is a member that regulates the so-called submarine phenomenon in which the occupant tries to move forward while sinking into the seating portion 4 at the time of a vehicle collision (front collision), and the front portion of the left and right seating portions side frames 41. Is provided so as to connect. The submarine pipe 43 is arranged under the pan frame 42, more specifically, in a state of being inserted into the recess 42A at the rear side in the recess 42A formed in the pan frame 42. As shown in FIG. 1, the rear connecting pipe 44 is provided so as to connect the rear portions of the left and right seating portion side frames 41.

As shown in FIG. 5, the pump mounting bracket 6 is a plate-shaped member extending in the left-right direction, and a recess 6A having a shape recessed from the bottom to the top is formed. The pump mounting bracket 6 is attached to the pan frame 42 in a state where the convex portion 6B formed on the back side of the concave portion 6A of the pump mounting bracket 6 is inserted into the concave portion 42A of the pan frame 42 as shown in FIG. ing.
The pump 32 is placed in a leather bag 61 having cushioning properties (see FIG. 4), and is attached to the pump mounting bracket 6 in a state of being inserted into the recess 6A of the pump mounting bracket 6 (see also FIG. 5). As a result, the pump 32 is arranged under the pan frame 42 in a state of being inserted into the recess 42A of the pan frame 42.

Further, the pump 32 is arranged in front of the recess 42A of the pan frame 42, in other words, in front of the submarine pipe 43 arranged in the recess 42A. Specifically, the pump 32 and the submarine pipe 43 are arranged side by side in the front-rear direction while being inserted into the recess 42A of the pan frame 42, that is, at least a part of the pump 32 and the submarine pipe 43 are arranged so as to overlap each other when viewed from the front-rear direction.

Further, as shown in FIG. 4, the pump 32 is moved to the left side between the left and right seating portion side frames 41 so that its longitudinal direction (direction in which the axis of the cylinder extends) faces the left-right direction. , Is arranged substantially parallel to the central portion in the left-right direction of the submarine pipe 43. The pump 32 has an outlet 32A, which is an outlet for air, and is mounted so that the outlet 32A is located closer to the center in the left-right direction between the left and right seated side frames 41. That is, in the pump 32, one end (left end) in the longitudinal direction in which the delivery port 32A is not provided is arranged near the left and right end between the left and right seat side frames 41 (left seat side frame 41). The other end (right end) in the longitudinal direction provided with the delivery port 32A is provided so as to be arranged closer to the center in the left-right direction between the left and right seating portions side frames 41. ..

Under the pan frame 42, the seat spring 45, and the like, the hose 34 connected to the outlet 32A of the pump 32, the harness 38 connecting the controller and the control unit 33, and the like are provided at several points by the binding band 91 to the pump mounting bracket 6. It is fastened to a seat spring 45 or the like so that it does not hang down or move due to vibration or pressure when air is supplied.

<Detailed configuration of seat back>
As shown in FIG. 1, the seat back frame 50 includes left and right seat back side frames 51 constituting the left and right frames of the seat back 5, member frames 52 as connecting members, and upper portions of the left and right seat back side frames 51. It mainly includes a substantially U-shaped pipe frame 53 that connects the pipes to each other. Further, a pressure receiving member 56 as an air bag mounting member is arranged between the left and right seat back side frames 51.

As a reminder, in the following description, the front / rear and top / bottom are based on the occupant seated on the vehicle seat 1 in which the seat back 5 is not tilted by the reclining mechanism.

The member frame 52 is a plate-shaped member that is arranged so as to be passed between the lower portions of the left and right seat back side frames 51 and connects the left and right seat back side frames 51. As shown in FIGS. 6A and 6B, the member frame 52 has a rear wall portion 52A and a flange portion 52B extending upward and diagonally forward from the upper end of the rear wall portion 52A.

As shown in FIG. 7, the pressure receiving member 56 is a substantially rectangular plate-shaped member made of resin or the like, and mainly via the upper connecting wire 57 and the lower connecting wire 58, the seat back side frame 51 and the pipe frame 53. It is attached to. Specifically, as shown later in FIG. 8, the upper connecting wire 57 and the lower connecting wire 58 are engaged with the pressure receiving member 56 by a plurality of claw portions 56D, and the left and right ends extending from the pressure receiving member 56 are After bending, the upper connecting wire 57 is attached to the support tongue piece 53A fixed to the pipe frame 53, and the lower connecting wire 58 as a mounting member is a side bracket 7 fixed to the inner surface of the seat back side frame 51 ( (See FIG. 7).

The pressure receiving member 56 attached as described above is subjected to a predetermined load or more from the occupant toward the rear when the vehicle is rear-end collision or collides during reverse travel, and the upper connecting wire 57 and the lower portion are applied. By bending the bent portion of the connecting wire 58, it is possible to move backward with respect to the seat back side frame 51. As a result, the upper body of the occupant moves rearward and sinks into the seat back 5, so that the influence of the load at the time of a rear collision on the occupant can be mitigated.

The upper connecting wire 57 is bent and passed behind the pressure receiving member 56 so as to avoid the convex portion 56J which is the back side of the concave portion 56B described later, and the convex portion 56J is below the convex portion 56J. It engages with a claw portion 56D (see also FIG. 9) provided so as to extend downward from the top.

As shown in FIGS. 7 and 9, the pressure receiving member 56 has an attached portion 56A to which the air bags 31A and 31B described later are attached. Two attached portions 56A are arranged on the upper portion of the pressure receiving member 56 so as to be arranged at a predetermined interval in the left-right direction. Each attached portion 56A is provided at the top of a convex portion 56C that protrudes forward from the bottom of a concave portion 56B formed in the upper portion of the pressure receiving member 56 and is recessed toward the rear, and fastens the air bags 31A and 31B. Has a through hole (reference numeral omitted) through which the screw 92 for screwing is screwed.

As shown in FIG. 10, the side bracket 7 is a metal plate-shaped member to which an air bag 31L (or 31R) described later is attached, and has a substantially L shape in which the upper portion extends rearward in a side view. ing. The upper end portion 7A, the front lower end portion 7B, and the rear lower end portion 7C of the side bracket 7 are each bent toward the outside in the left-right direction (seat back side frame 51).

In the side bracket 7, near the lower portion of the inner surface of each seat back side frame 51 (only one is shown), the front end, the front lower end portion 7B, and the rear lower end portion 7C of the upper end portion 7A are located at three locations, respectively. It is fixed by welding. The first fixed portion W1 and the second fixed portion W2, which are welded portions, are provided side by side in the vertical direction, and the third fixed portion W3, which is the welded portion, is provided in the vertical direction (first fixed portion W1 and second fixed portion W2). Between the first fixed portion W1 and the second fixed portion W2 (direction in which the first fixed portion W1 and the second fixed portion W2 are lined up), and in the front-rear direction (direction orthogonal to the direction in which the first fixed portion W1 and the second fixed portion W2 are lined up), specifically. It is provided so as to be offset to the rear. That is, the first fixed portion W1, the second fixed portion W2, and the third fixed portion W3 are provided so as to form a triangular shape (see the chain line). In the present embodiment, the first fixing portion W1 is provided so as to partially cover the convex portion 51A provided on the inner surface of the seat back side frame 51 and projecting inward in the left-right direction. As a result, the mounting rigidity of the side bracket 7 is improved, so that the air bags 31L and 31R and the pressure receiving member 56 can be supported more stably.

The side bracket 7 has a long hole 71 as a mounting member engaging portion with which the end portion 58B of the lower connecting wire 58 engages, and a plate member 8 (see FIG. 15A) to which the air bags 31L and 31R are described later. A fixing hole 72 as an air bag fixing portion fixed via the air bag is mainly provided.
The elongated hole 71 is formed in the upper part of the side bracket 7 so as to extend in the front-rear direction from between the first fixing portion W1 and the second fixing portion W2 toward the rear side where the third fixing portion W3 is provided. ing. The elongated hole 71 is inclined toward the rear diagonally downward direction.
The fixing hole 72 is a circular hole, and is formed in the upper part of the side bracket 7 at the lower side between the elongated hole 71 and the third fixing portion W3 (closer to the third fixing portion W3).

Although detailed description is omitted, the right side bracket 7 fixed to the right seat back side frame 51 is formed symmetrically with the left side bracket 7 described with reference to FIG. 10.

<Detailed configuration of support device>
As shown in FIG. 11, the air bags 31A and 31B are attached to the attached portion 56A of the pressure receiving member 56 in a state where the air bags 31A are on the front side and the air bags 31B are on the rear side. In the following description, the air bag 31A may be referred to as "front air bag 31A", and the air bag 31B may be referred to as "rear air bag 31B".

As shown in FIGS. 12A and 12B, the front air bag 31A and the air bag 31B are each formed by bonding two resin sheet-like members by welding or the like, and the pump 32. It mainly has an air chamber 31C into which the air supplied from the above can enter, and a mounting hole 31D as a mounting portion.

The air chamber 31C is to weld two sheet-shaped members with a substantially U-shaped contour having a concave portion in the central portion in the left-right direction of the upper portion when viewed from the front as shown in FIG. (See welded portion W4). As a result, as shown in FIG. 13 (only the front air bag 31A is shown), each of the air bags 31A and 31B has the air chamber 31C dented downward with the central portion in the left-right direction of the upper portion in the expanded state. It is configured to have a concave portion 31E having a uniform shape. In other words, in each of the air bags 31A and 31B, the air chambers 31C are formed only at both ends in the left-right direction in the predetermined region H below the upper end of the air chamber 31C. With such a configuration, the thickness of each of the air bags 31A and 31B in the front-rear direction in the expanded state in the predetermined region H is thinner in the thickness D1 in the center portion in the left-right direction than in the thickness D2 at both ends in the left-right direction. ing.

As shown in FIGS. 12A and 12B, the rear air bag 31B has a length L2 from the upper end of the air chamber 31C to the lower end of the mounting hole 31D in the vertical direction in the vertical direction of the front air bag 31A. The length from the upper end of the air chamber 31C to the lower end of the mounting hole 31D is longer than the length L1. Therefore, when the front air bag 31A and the rear air bag 31B are attached to the pressure receiving member 56 (see FIG. 11), the air chamber 31C of the front air bag 31A and the air chamber 31C of the rear air bag 31B are viewed from the front. Therefore, although some of them overlap, they are arranged so as to be displaced in the vertical direction.

Two mounting holes 31D are provided above the air bags 31A and 31B so as to be arranged in the left-right direction (above the air chamber 31C). As shown in FIG. 11, in a state where the upper ends of the air bags 31A and 31B are aligned and stacked back and forth, the screw 92 is passed through the mounting hole 31D and the mounted portion 56A provided on the pressure receiving member 56. It is attached to the pressure receiving member 56 by being fixed to (see also FIG. 9).

A hose 35 is connected to the air chamber 31C of the front air bag 31A via a tubular connector 35C, and a hose 36 is connected to the air chamber 31C of the rear air bag 31B via a tubular connector 36C. .. More specifically, as shown in FIG. 13, the hoses 35 and 36 are located between the two sheet-shaped members above the portion to be connected to the air chamber 31C (above the connector 35C in FIG. 13), respectively. It enters, passes between two screws 92 (mounting holes 31D), and is connected to the air chamber 31C via connectors 35C and 36C at the bottom portion of the recess 31E formed in the upper part of the air chamber 31C. .. The connector 35C of the front air bag 31A and the connector 36C of the rear air bag 31B are arranged so as to be offset in the left-right direction when viewed from the front. As a result, the hose 35 and the hose 36 are less likely to overlap each other on the front side of the pressure receiving member 56, so that it is possible to prevent an unnecessary load from being applied to the hoses 35 and 36.

As shown in FIG. 1, the air bags 31L and 31R are attached to the left or right seat back side frame 51 via the plate member 8 (see FIG. 15A), respectively.
As shown in FIG. 14, the left air bag 31L is formed by welding two resin sheet-like members, similarly to the air bags 31A and 31B. The air bag 31L mainly has an air chamber 31S into which the air supplied from the pump 32 enters, a mounting portion 31T which is a mounting portion for the plate member 8 (seat back side frame 51), and a relief portion 31U. is doing.

As shown in FIG. 14, the air chamber 31S welds the two sheet-shaped members into a substantially U shape having a recess in the central portion in the vertical direction of the rear portion when viewed from the inside in the left-right direction. (See welded portion W5).
The attachment portion 31T is a tag-shaped portion for attaching the air bag 31L to the plate member 8, and is formed so as to extend rearward from the upper end and the lower end of the rear portion of the air bag 31L, respectively. The air bag 31L has a mounting portion 31T (rear end portion) fixed to the plate member 8 by a pin-shaped clip 93, and the plate member 8 is fixed to the seat back side frame 51 to the seat back side frame 51. It is attached.

The relief portion 31U is a concave portion formed in the rear portion of the air bag 31L that is recessed toward the front, is below the upper mounting portion 31T, and is above the lower mounting portion 31T (that is, 2). It is provided between the two mounting portions 31T). In other words, the air bag 31L has a mounting portion 31T above and below the relief portion 31U, respectively. The relief portion 31U has a lower portion as another member (a part different from the air bags 31L and 31R and the plate member 8) that engages with the elongated hole 71 of the side bracket 7 when the vehicle seat 1 is assembled. The connecting wire 58 will be arranged in the inserted state.

The end of the hose 37 is connected to the air chamber 31S (air bag 31L) via a tubular connector 37C made of metal, resin, or the like. As a result, the air from the hose 37 can be supplied into the air bag 31L (air chamber 31S). The end portion of the hose 37 is fixed to the hose fixing portion 82 described later of the plate member 8 together with the connector 37C at the insertion portion into which the connector 37C is inserted by a binding band 94 with a clip. The hose 37 is fixed to the seat back side frame 51 by attaching the plate member 8 to the seat back side frame 51.

Although detailed description is omitted, the right air bag 31R attached to the right seat back side frame 51 is formed symmetrically with the left air bag 31L described with reference to FIG.

Here, the arrangement (piping) of the hoses 34 to 37 will be described in detail.
As shown in FIG. 4, one end of the hose 34 for supplying air from the pump 32 to the control unit 33 is connected to the outlet 32A of the pump 32, and the pan frame 42, the seat spring 45, and the rear connecting pipe 44 (FIG. 4). Passing under 1) and backwards, passing behind the seat back frame 50 and connecting the other end to the control unit 33.

One end of the hoses 35 and 36 for supplying air from the control unit 33 to the air bags 31A and 31B is connected to the control unit 33, and one end thereof is directed upward along the left seat backside frame 51 and above the pressure receiving member 56. It is pulled out to the front side of the pressure receiving member 56 through the air bag, and as shown in FIG. 11, the other ends are connected to the air bag 31A or the air bag 31B, respectively. As shown in FIG. 8, the hoses 35 and 36 are bundled and held at the diagonally left rear portion of the pressure receiving member 56. Since the upper end portion 56T of the pressure receiving member 56 has a concave shape in which the central portion in the left-right direction is recessed downward with respect to both end portions, the upper end portion 56T is passed over the pressure receiving member 56 from diagonally left rear toward the center in the left-right direction. The hoses 35 and 36 can be smoothly bent and brought closer to the upper end portion 56T near the center in the left-right direction. As a result, the hoses 35 and 36 can be compactly arranged in the vertical direction. Further, as shown in FIG. 11 (see also FIG. 7), since the concave portion 56K recessed rearward is formed in the center in the left-right direction (between the concave portions 56B) of the upper front surface of the pressure receiving member 56, the pressure receiving member Interference between the 56 and the hoses 35 and 36 pulled out in front of the pressure receiving member 56 can be suppressed.

As shown in FIG. 6A, one end of the hose 37 for supplying air from the control unit 33 to the left and right air bags 31L and 31R is connected to the control unit 33 and is arranged along the member frame 52. The other ends of the two branches are connected to the air bag 31L or the air bag 31R, respectively. More specifically, the hose 37 extending from the control unit 33 (referred to as “introduction pipe 37A”) extends downward along the left seat backside frame 51 and then extends to the front surface of the rear wall portion 52A. It is arranged so as to extend toward the center in the left-right direction along the line. The hose 37 is left and right near the center of the rear wall portion 52A (between the left and right seat back side frames 51) in the left-right direction, specifically, slightly to the right of the center of the rear wall portion 52A in the left-right direction. It is branched. The left supply pipe 37L connecting the branch portion 37B and the air bag 31L is arranged so as to extend from the branch portion 37B under the introduction pipe 37A so as to extend the front surface of the rear wall portion 52A diagonally upward to the left. Further, the right supply pipe 37R connecting the branch portion 37B and the air bag 31R is arranged so as to extend diagonally upward to the right along the front surface of the rear wall portion 52A from the branch portion 37B.

As shown in FIG. 6 (b), the hose 37 (introduction pipe 37A, left supply pipe 37L and right supply pipe 37R (not shown in FIG. 6 (b)) is rearward in the vicinity of the center portion in the left-right direction of the member frame 52. It is arranged along the corner portion 52C of the bent portion formed by the wall portion 52A and the flange portion 52B. As a result, the hose 37 is covered by the rear wall portion 52A, and particularly in the vicinity of the center portion in the left-right direction of the member frame 52, the hose 37 is covered by the flange portion 52B, so that the hose 37 is protected by the member frame 52. ..

As shown in FIG. 6A, the hose 37 is fixed to the member frame 52 at several points by the binding bands 95A to 95C. Specifically, the introduction pipe 37A is fixed to the center of the lower surface of the flange portion 52B in the left-right direction by the binding band 95A. Further, in the lower left of the fixed portion, the introduction pipe 37A and the left supply pipe 37L are fixed to the front surface of the rear wall portion 52A in a bundled state by one binding band 95B. Further, the introduction pipe 37A, the left supply pipe 37L, and the right supply pipe 37R are each fixed to the front surface of the rear wall portion 52A by the binding band 95C below the bending portion 58A of the lower connecting wire 58.
The binding band 95C is provided near the upper end of the member frame 52, in other words, near the lower portion of the bent portion 58A. According to this, the length of the hose 37 (left supply pipe 37L and right supply pipe 37R) is shortened as compared with the case where the binding band 95C is provided at a position far from the bent portion 58A, for example, at the lower end of the member frame 52. be able to.

As shown in FIG. 15A, the plate member 8 is a substantially plate-shaped member that regulates the inflating direction of the air bag 31L, and is arranged adjacent to the outer side of the air bag 31L in the left-right direction. The plate member 8 is made of resin and mainly has a main body portion 81, a hose fixing portion 82, a frame fixing portion 83, and claw portions 84 and 85.

At the upper and lower ends of the rear portion of the main body 81, long engaging holes 81A in the vertical direction with which the clip 93 for attaching the air bag 31L (mounting portion 31T) is engaged are provided. Further, a relief portion 81B having a shape recessed toward the front is provided at the rear portion of the main body portion 81, specifically, between the upper and lower engagement holes 81A, corresponding to the relief portion 31U of the air bag 31L. There is. As shown in FIG. 14, the relief portion 81B is formed so as to substantially overlap the relief portion 31U of the air bag 31L attached to the plate member 8, and is provided on the side bracket 7 when viewed from the inside in the left-right direction. The rear end of the long hole 71 is facing. Similar to the relief portion 31U of the air bag 31L, the relief portion 81B is arranged with the lower connecting wire 58 that engages with the elongated hole 71 of the side bracket 7 inserted when the vehicle seat 1 is assembled. ..

As shown in FIG. 15 (a), the front portion of the surface of the main body portion 81 on the inner side (right side) in the left-right direction is the outer side in the left-right direction (speaking of the plate member 8 on the left) with respect to the rear portion extending substantially in the front-rear direction. , An inclined surface 81C extending toward the left diagonally forward) is provided.
The hose fixing portion 82 is a portion to which a binding band 94 (see FIG. 14) for fixing the end portion of the hose 37 and the connector 37C is attached, and is directed backward from the lower portion in the vertical direction of the bottom of the relief portion 81B. It is formed to extend. The hose fixing portion 82 is provided with a through hole (reference numeral omitted) with which the clip portion of the binding band 94 is engaged.

The frame fixing portion 83 and the claw portions 84 and 85 are portions for fixing the plate member 8 to the seat back side frame 51. The frame fixing portion 83 is formed in a substantially plate shape extending rearward from the upper portion of the hose fixing portion 82 in the bottom of the relief portion 81B, and has a through hole (reference numeral omitted) through which the screw 96 is inserted. It is provided. The claw portion 84 is formed so as to extend outward in the left-right direction from the upper end of the front portion of the outer surface in the left-right direction of the main body portion 81 and bend downward (see also FIG. 15 (b)). Further, the claw portion 85 is formed so as to extend outward in the left-right direction from the lower part of the front end of the outer surface in the left-right direction of the main body portion 81 and bend toward the rear (see also FIG. 15 (c)). ..

When the plate member 8 is attached to the seat back side frame 51, these claw portions 84 and 85 are hooked on the rod member 55 fixed to the front surface of the seat back side frame 51 by welding or the like. More specifically, the claw portion 84 is hooked from above on the first extending portion 55A extending substantially in the front-rear direction of the rod member 55, and the claw portion 85 is hooked on the second extending portion 55B extending in the substantially vertical direction of the rod member 55. It is designed to be caught from the front.

When attaching the air bag 31L to the seat back side frame 51, first, the air bag 31L (mounting portion 31T) is attached to the plate member 8 (engagement hole 81A) by the clip 93. After that, the claws 84 and 85 of the plate member 8 to which the air bag 31L is attached are hooked on the rod member 55 fixed to the seat back side frame 51, respectively. Then, the air bag 31L is fixed to the seat back side frame 51 by passing the screw 96 through the through hole of the frame fixing portion 83 and screwing it into the fixing hole 72 of the side bracket 7 fixed to the seat back side frame 51. Will be done.

Although detailed description is omitted, the right plate member 8 attached to the right seat back side frame 51 is formed symmetrically with the left plate member 8 described with reference to FIGS. 14 and 15.

<Action of support device>
Next, the operation of the support device 3 will be described.
When the occupant sits on the vehicle seat 1 whose support position is adjusted by the air bags 31A and 31B, the occupant's upper body (waist) is moved to the left and right of the air bags 31A and 31B arranged rearward as shown in FIG. The central portion in the direction is thin, that is, the portion is recessed with respect to both ends in the left-right direction, and is supported by the both ends in the left-right direction (air chamber 31C) so as to be wrapped from the left and right. In particular, in the present embodiment, since the air chambers 31C are formed only at both ends in the left-right direction in the predetermined region H, the movable range of the left and right air chambers 31C located in the predetermined region H is large. , The air bags 31A and 31B are easily deformed into a shape along the upper body of the occupant. As a result, the waist of the occupant can be suitably supported from behind.

Further, when adjusting the left and right support positions of the waist by operating the controller (not shown), particularly when inflating the air bags 31L and 31R, the air bags 31L and 31R tend to inflate to both the left and right sides. However, as shown in FIGS. 16A to 16B (only the air bag 31L is shown), the plate member 8 regulates the expansion to the outside in the left-right direction, and as a result, the bag expands inward in the left-right direction. Since the air bags 31L and 31R are covered with a cushion material or a skin material (not shown), when they swell, they are pressed by the cushion material or the like, and the front portion thereof gradually extends along the inclined surface 81C of the plate member 8. go. As a result, the air bags 31L and 31R will eventually inflate diagonally forward (see the arrow) inward in the left-right direction, so that the waist of the occupant can be suitably supported from diagonally behind in the left-right direction. can.

<Effect>
According to the vehicle seat 1 described above, the following effects can be obtained in the present embodiment.

As shown in FIG. 1, since the pump 32 is arranged under the highly rigid pan frame 42 connecting the left and right seating portion side frames 41, the seat spring 45 and the seat spring 45 when the occupant sits on the seating portion 4 Even if the cushion material or the like bends and descends, the interference between the seat spring 45 or the like and the pump 32 can be suppressed.

Further, as shown in FIG. 3, since the pump 32 is arranged in front of the submarine pipe 43, even if a submarine phenomenon occurs at the time of a vehicle collision, the occupants, the seat spring 45, and the like are supported by the submarine pipe 43. Therefore, it is possible to suppress the interference between the seat spring 45 and the like and the pump 32. Further, when the submarine phenomenon occurs, the load from the occupant is received by the submarine pipe 43, so that it is possible to suppress the load from being applied to the pump 32.

Further, as shown in FIG. 4, since the pump 32 is arranged so that the longitudinal direction faces the left-right direction, the pump 32 is arranged along and close to the submarine pipe 43 extending in the left-right direction. Therefore, the pump 32 and the submarine pipe 43 can be compactly arranged in the front-rear direction. This makes it possible to reduce the size of the vehicle seat 1 in the front-rear direction.

Further, since the pump 32 is provided so that the end portion provided with the air outlet 32A is arranged closer to the center in the left-right direction, the outlet 32A is located closer to the center in the left-right direction. As a result, the lengths of the hoses 34 can be made substantially equal regardless of whether the control unit 33 or the like is arranged on the left or right side. Further, since the outlet 32A is located closer to the center in the left-right direction, the hose 34 toward the control unit 33 is compared with the case where the outlet 32A is located closer to the end in the left-right direction (near the seating portion side frame 41). The bending condition of the hose can be loosened.

Further, as shown in FIGS. 3 and 5, the pump 32 is mounted in a state of being inserted into the recess 6A of the pump mounting bracket 6, and the pump mounting bracket 6 is mounted in a state of being inserted in the recess 42A of the pan frame 42. Therefore, the pump 32, the pump mounting bracket 6, and the pan frame 42 can be compactly arranged in the vertical direction. This makes it possible to reduce the size of the vehicle seat 1 in the vertical direction.

Further, since the pump 32 and the submarine pipe 43 are arranged side by side in the front-rear direction in a state of being inserted into the recess 42A of the pan frame 42, the pump 32, the submarine pipe 43 and the pan frame 42 can be compactly arranged in the vertical direction. can. This also makes it possible to reduce the size of the vehicle seat 1 in the vertical direction. Further, as compared with the configuration in which the pump 32 and the submarine pipe 43 are arranged side by side in the vertical direction, the workability of assembling the pump 32 and the submarine pipe 43 can be improved.

Further, since the pan frame 42 and the pump mounting bracket 6 have the concave portion 42A and the concave portion 6A (convex portion 6B), respectively, the pan frame 42 and the pump mounting bracket 6 have an uneven shape as a whole. The rigidity of the pan frame 42 and the pump mounting bracket 6 can be improved. Thereby, the mounting rigidity of the pump 32 can be improved.

Further, as shown in FIG. 4, in the present embodiment, since the pump 32 is attached to the pump mounting bracket 6 in a state of being put in the leather bag 61 having a cushioning property, the pump 32 and the pump due to vibration or the like are attached. Interference with the mounting bracket 6 and the like can be suppressed. Thereby, for example, it is possible to suppress the generation of abnormal noise from the seating portion 4.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The specific configuration can be appropriately changed without departing from the spirit of the present invention.

In the above embodiment, the pump 32 is attached to the pan frame 42 (connecting member) via the pump mounting bracket 6, but the present invention is not limited thereto. For example, the pump may be directly attached to the connecting member after taking measures against interference such as putting it in the leather bag 61 of the embodiment.

In the above embodiment, the pump 32 is arranged so as to be moved to the left side between the left and right seating portion side frames 41, but the present invention is not limited thereto. For example, the pump may be placed closer to the right side between the left and right seating side frames.

Further, in the above-described embodiment, the pump 32 is arranged so that the longitudinal direction faces the left-right direction, but the present invention is not limited thereto. For example, the pump may be arranged so that the longitudinal direction faces the front-back direction.

When the pump is arranged so that the longitudinal direction faces the front-rear direction, the pump can be arranged close to one of the left-right directions (one seating portion side frame). In such a configuration, by arranging the pump and the control unit on the same side in the left-right direction, the hose for supplying gas from the pump to the control unit is shortened as compared with the case where the pump and the control unit are arranged on the opposite side. Can be done.

In the above embodiment, the pan frame 42 is exemplified as the connecting member, but the present invention is not limited thereto. For example, the connecting members may be arranged side by side in the front-rear direction, and may be a plurality of pipes connecting the front portions of the left and right seating portion side frames.

In the above embodiment, the submarine pipe 43 (pipe-shaped member) is exemplified as the submarine regulating member, but the present invention is not limited thereto. For example, the submarine regulation member may be a member formed by pressing a metal plate or the like, an airbag device, or the like. Further, the above-mentioned connecting member (pan frame or the like) may be provided with a function of regulating the submarine phenomenon.

In the above-described embodiment, the seat 1 for a vehicle such as an automobile is shown as an application example of the seat for a vehicle, but the present invention is not limited to this, and the seat for other vehicles, for example, a seat for a ship or an aircraft. It can also be applied.

In the above-described embodiment, the seat portion 2 is formed with the seat portion 4 and the seat back 5 as separate bodies (the seat back 5 is fixed to the seat portion 4 via a reclining mechanism). Not limited to. For example, the seat portion may have a configuration having a side frame such that the seat portion side frame and the seat back side frame are integrally formed.

1 Vehicle seat 2 Seat 3 Support device 4 Seat 5 Seat back 6 Pump mounting bracket 6A Concave 6B Convex 31A Air bag 31B Air bag 31L Air bag 31R Air bag 32 Pump 32A Outlet 40 Seat frame 41 Seat side Frame 42 Pan frame 42A Recess 43 Submarine pipe

Claims (1)

A vehicle seat comprising a seat portion having a seating portion and a seat back, and an air bag provided in the seat portion and changing the support position of an occupant by expanding or contracting.
The sheet part is
The long left and right side frames that make up the left and right frames,
A plate member disposed between the air bag and the side frame.
The plate member is
The first part having the first support surface and
It has a second portion that is orthogonal to the left-right direction from the first portion and extends to the occupant side in the lateral direction of the side frame.
The second portion is a second support surface extending from the first support surface, and is a second support inclined so as to be located outward in the left-right direction as the distance from the first support surface increases with respect to the first support surface. Has a face,
A vehicle seat characterized in that the air bag is supported by the first support surface and the second support surface when the air bag expands.

Images