JP7152685B2 - vehicle seat - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat with an air bladder that expands or contracts to change the support position of an occupant.

2. Description of the Related Art Conventionally, there has been known a vehicle seat provided with a support device capable of adjusting the support position of the occupant's lower back 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 below the seat cushion portion.

JP 2010-235021 A

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

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a vehicle seat that can favorably support an occupant.

In order to achieve the above-described object, a vehicle seat includes a seat portion having a seating portion and a seat back, and an air bag provided in the seat portion and expanding or contracting to change the support position of the occupant. a vehicle seat, wherein the seat portion includes elongated left and right side frames forming left and right frames, and a plate member disposed between the air bag and the side frames; The plate member has a first portion having a first support surface and a second portion having a second support surface extending from the first support surface and inclined with respect to the first support surface. and the air bag is supported by the first support surface and the second support surface when the air bag is inflated.
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: It is possible to adopt a configuration in which the direction of hooking on the rod member is different.
In the vehicle seat described above, the first portion may have an engagement hole for attaching the air bag.
In the vehicle seat described above, the first claw portion and the second claw portion are spaced apart in the longitudinal direction of the side frame, and the engaging holes are spaced apart in the longitudinal direction. a first engagement hole and a second engagement hole, wherein the distance between the first engagement hole and the second engagement hole is the distance between the first claw portion and the second claw portion It can be configured to be longer than the distance between them.
In the vehicle seat described above, the claw portion may be positioned outside the engagement hole in the left-right direction.
In the vehicle seat described above, the second portion may have a portion whose size in the longitudinal direction of the side frame is smaller than that of the first portion.
In the vehicle seat described above, the first portion has an engagement hole for attaching the air bag and a frame fixing portion for fixing the plate member to the side frame, and the engagement hole is , a first engagement hole and a second engagement hole spaced apart in the longitudinal direction of the side frame, and the frame fixing portion includes the first engagement hole and the second engagement hole. It can be a configuration provided between.
The vehicle seat includes a seat portion having a seating portion and a seat back, and an air bag provided in the seat portion and configured to expand or contract to change a support position of an occupant. The seat portion includes long left and right side frames forming left and right frames, and the air bag is fixed to the side frames via plate members and extends along the longitudinal direction of the side frames. A first air bag having a concave portion formed at an end thereof, the first air bag having a mounting portion fixed to the plate member, the mounting portion being spaced apart in the longitudinal direction. The vehicle seat has a first attachment portion and a second attachment portion, the vehicle seat further includes a hose connected to the first air bladder for supplying gas to the first air bladder, and the recess includes the The connection portion between the first air bag and the hose is provided at a different position in the longitudinal direction from the connection portion between the first air bag and the hose, and the connection portion between the first air bag and the hose is located in the longitudinal direction between the first attachment portion and the first air bag. It is characterized by being positioned between two mounting portions.
In the vehicle seat described above, the first air bladder 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 attachment portion and the second attachment portion in the longitudinal direction.
In the vehicle seat described above, the first attachment portion and the second attachment portion may 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 attachment portion may include an attachment portion formed at the lower end of the first air bag.
The vehicle seat may include a pressure receiving member disposed 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 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 in the left-right direction.
Further, the vehicle seat includes a seat portion having a seating portion and a seat back, and a support device provided in the seat portion capable of adjusting a support position of the waist of an occupant, and Left and right seating portion side frames that constitute left and right frames of the seat, connecting members that extend in the left and right direction and connect the left and right seating portion side frames, and the support device that constitutes the support device and expands or contracts to expand or contract the support. A position-changing air bag, a pump for supplying gas to the air bag, and a laterally extending bracket for attaching the pump to the connecting member, wherein the bracket is recessed from bottom to top. The pump is attached to the bracket with its central axis extending above the lower end of the recess of the bracket, and the connecting member is recessed from bottom to top. A concave portion is provided, and the bracket is attached to the connecting member in a state of being inserted into the concave portion of the connecting member.

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

In the vehicle seat described above, the pump may be arranged such that the gas delivery port is above the lower end of the recess of the bracket.
In the vehicle seat described above, the pump may be arranged in such a manner that the entire pump is above the lower end of the recess of the bracket.

In the above-described vehicle seat, the bracket is attached to the connecting member in a state in which the protrusion formed on the back side of the recess of the bracket enters the recess of the connecting member, and the bottom wall of the recess of the bracket is attached to the bracket. The length in the left-right direction may 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 concave portion 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 and forming the recess of the connecting member.

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

In the above-described vehicle seat, the pump may be arranged with its central axis being inserted into the recess of the connecting member.
In the above-described vehicle seat, the pump has one end portion in the longitudinal direction where the gas delivery port is not provided, and is disposed near the left and right ends between the left and right seating portion side frames. It is possible to adopt a configuration in which the other end in the longitudinal direction provided is arranged near the center in the left-right direction between the left and right seat portion side frames.

ADVANTAGE OF THE INVENTION According to this invention, a passenger|crew can be supported suitably.

1 is a perspective view of a vehicle seat according to an embodiment of the invention; FIG. 1 is a schematic diagram of a support device; FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; It is the figure which looked at the bread frame from the bottom. FIG. 5 is a cross-sectional view taken along the line BB of FIG. 4; FIG. 2A is a front view of the seatback frame, and FIG. 2B is a sectional view taken along line CC of FIG. FIG. 4 is a perspective view of the pressure receiving member and the seat back side frame as seen obliquely from the front right. It is the figure which looked at the receiving pressure member and the seat back side frame from the back. FIG. 8 is a cross-sectional view taken along line DD of FIG. 7; It is the figure which looked at the left seat back side frame and side bracket from the left-right direction inner side. FIG. 4 is a front view of the seatback frame, air bags arranged behind the occupant, and the pressure receiving member; They are a front view (a) of a front air bag and a front view (b) of a rear air bag. FIG. 4 is a perspective view showing a state in which the front air bag is inflated; It is the figure which looked at the left seat back side frame and air bag from the inside of the left-right direction. It is a perspective view (a) of a left seat back side frame, a side bracket, a plate member, and an air bag, and figures (b) and (c) showing a claw portion of the plate member. It is the figure which looked at the air bag and plate member which are arrange|positioned to the left of a passenger|crew from the top, and is the figure (a) which shows a contracted state, and the figure (b) which shows an inflated state.

Next, one 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.

<General configuration of vehicle seat>
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 inside the seat portion 2. As shown in FIG. The seat portion 2 mainly includes a seat portion 4 on which an occupant sits, a seat back 5 fixed to the seat portion 4 via a reclining mechanism, and a headrest (not shown).

The seat portion 4 and the seat back 5 are formed by covering the outside of the seat portion frame 40 and the seat back frame 50 with a cushion material (not shown) made of urethane foam or the like and a skin material (not shown) made of synthetic leather or fabric. It consists of 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. As shown in FIG.

The air bags 31A and 31B are members that support the waist of the occupant seated on the vehicle seat 1 from behind, and are arranged between the left and right seatback side frames 51 . The air bags 31L and 31R are support members that support the lumbar region of the occupant from the left or right side, 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 amount of opening and closing of the valve unit, etc. (all not shown). is doing.

A hose 34 connects the pump 32 and the control unit 33 , a hose 35 connects the air bag 31 A and the control unit 33 , and a hose 36 connects the air bag 31 B and the control unit 33 . One end of the hose 37 is connected to the control unit 33, and the hose 37 branches in the middle, and each end is connected to the air bag 31L or the air bag 31R. Thus, in the present embodiment, it is possible to individually adjust the expansion amounts of the air bag 31A, the air bag 31B, and the air bags 31L and 31R.

The valve unit of the control unit 33 of the support device 3 is normally closed. When the occupant operates a controller (not shown), the valve unit is opened, air is supplied from the pump 32, the air bags 31A, 31B, 31L, and 31R are expanded and deformed, and the valve unit is opened. In this state, the air bags 31A, 31B, 31L, 31R are contracted and deformed by pressure from the occupant on the air bags 31A, 31B, 31L, 31R. This makes it possible to change (adjust) the support position of the lumbar region of the occupant. Excess air supplied from the pump 32 to the control unit 33 and air pushed out from the air bags 31A, 31B, 31L, and 31R are discharged outside by the relief valves of the control unit 33.

<Detailed configuration of the seating part>
As shown in FIG. 1, the seat frame 40 includes left and right seat side frames 41 forming left and right frames of the seat 4, a pan frame 42 as a connecting member, and a submarine pipe 43 (as a submarine regulating member). 3 and 4), a rear connecting pipe 44, and a pump mounting bracket 6 as a bracket (see FIGS. 3 to 5). Each of the seat side frames 41 and the pan frame 42 is formed by pressing a metal plate.

The pan frame 42 is a member that extends in the left-right direction and connects the front portions of the left and right seat side frames 41. As shown in FIG. formed. A hook portion 42H is formed on the upper surface of the pan frame 42 (the portion corresponding to the bottom of the recess 42A). Between the hook portion 42H formed on the pan frame 42 and the rear connecting pipe 44, a seat spring 45 as an occupant supporting member that supports an occupant seated on the seat portion 4 is stretched (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 seat portion side frames 41, respectively. The submarine pipe 43 is a member that regulates the so-called submarine phenomenon in which the occupant attempts to move forward while sinking into the seat 4 at the time of a vehicle collision (frontal collision). are provided to connect the The submarine pipe 43 is arranged under the pan frame 42, more specifically, in a state of entering the recess 42A in the rear part of the recess 42A formed in the pan frame 42. As shown in FIG. As shown in FIG. 1 , the rear connecting pipe 44 is provided 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 is formed with a recess 6A that is recessed from bottom to top. The pump mounting bracket 6 is mounted on the pan frame 42 in a state in which the convex portion 6B formed on the back side of the concave portion 6A of the pump mounting bracket 6 enters the concave portion 42A of the pan frame 42, as shown in FIG. ing.
The pump 32 is placed in a cushioning leather bag 61 (see FIG. 4) and 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 while being inserted into the recess 42A of the pan frame 42 .

In addition, 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 in a state of being inserted into the recess 42A of the pan frame 42, that is, arranged so that at least parts of them overlap each other when viewed in the front-rear direction.

Further, as shown in FIG. 4, the pump 32 is positioned leftward between the left and right seating portion side frames 41 with its longitudinal direction (the direction in which the axis of the cylinder extends) facing the left-right direction. , are arranged substantially parallel to the central portion of the submarine pipe 43 in the left-right direction. The pump 32 has a delivery port 32A, which is an air outlet, and is installed in such a direction that the delivery port 32A is located near the center in the left-right direction between the left and right seat side frames 41. As shown in FIG. That is, the pump 32 has one longitudinal end (the left end) where the delivery port 32A is not provided, and is disposed near the left and right ends of the seating section side frames 41 (the left seating section side frame 41). ), and the other end (right end) in the longitudinal direction where the delivery port 32A is provided is provided so as to be arranged near the center in the left and right direction between the left and right seat portion side frames 41. .

Beneath the pan frame 42, seat spring 45, etc., the hose 34 connected to the delivery port 32A of the pump 32, the harness 38 connecting the controller and the control unit 33, and the like are connected to the pump mounting bracket 6 at several points by binding bands 91. , seat springs 45 or the like so as not to sag or move due to vibration or pressure when air is supplied.

<Detailed configuration of the seat back>
As shown in FIG. 1 , the seatback frame 50 includes left and right seatback side frames 51 forming left and right frames of the seatback 5 , member frames 52 as connection members, and upper portions of the left and right seatback side frames 51 . It is mainly provided with a substantially U-shaped pipe frame 53 that connects them. A pressure receiving member 56 as an air bag mounting member is arranged between the left and right seatback side frames 51 .

Just to be sure, in the following description, front and rear and up and down are based on an occupant sitting on the vehicle seat 1 with the seat back 5 not reclined by the reclining mechanism.

The member frame 52 is a plate-like member that is arranged to span between the lower portions of the left and right seatback side frames 51 and connects the left and right seatback 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 obliquely upward and 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-like member made of resin or the like. attached to the 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 at a plurality of claw portions 56D, and both left and right ends extending from the pressure receiving member 56 are After being bent, the upper connecting wire 57 is attached to the support tongue 53A fixed to the pipe frame 53, and the lower connecting wire 58 as an attachment member is attached to the side bracket 7 ( (see FIG. 7).

The pressure-receiving member 56 attached as described above is subjected to a load greater than a predetermined amount from the occupant toward the rear in the event of a rear-end collision, such as when the vehicle is rear-ended or when the vehicle is traveling in reverse. By bending the bent portion of the connecting wire 58 , it can be moved backward with respect to the seatback side frame 51 . As a result, the occupant's upper body moves rearward and sinks into the seat back 5, so that the impact of the load on the occupant in the event of a rear-end collision can be alleviated.

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

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

As shown in FIG. 10, the side bracket 7 is a plate-like member made of metal to which an air bag 31L (or 31R), which will be described later, is attached. 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 outward in the left-right direction (seatback side frame 51).

The side brackets 7 are attached to the seatback side frames 51 at three locations near the lower portion of the inner surface of each of the seatback side frames 51 (only one of which is shown): the front end of the upper end portion 7A, the front lower end portion 7B, and the rear lower end portion 7C. is fixed by welding. The first fixed part W1 and the second fixed part W2, which are the welded parts, are provided side by side in the vertical direction, and the third fixed part W3, which is the welded part, is arranged vertically between the first fixed portion W1 and the second fixed portion W2 in the direction in which the first fixed portion W1 and the second fixed portion W2 are arranged), and in the front-rear direction (the direction orthogonal to the direction in which the first fixed portion W1 and the second fixed portion W2 are arranged), specifically, It is set backward. That is, the first fixing portion W1, the second fixing portion W2 and the third fixing 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 that a portion of the first fixing portion W1 overlaps a convex portion 51A that is provided on the inner surface of the seatback side frame 51 and protrudes 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, 31R and the pressure receiving member 56 can be supported more stably.

The side bracket 7 has an elongated hole 71 as a mounting member engaging portion with which the end portion 58B of the lower connecting wire 58 is engaged, and a plate member 8 (see FIG. 15A) in which the air bags 31L and 31R will be described later. A fixing hole 72 is mainly provided as an air bag fixing portion to be fixed through.
The long hole 71 is formed in the upper portion 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 slanted rearward and obliquely downward.
The fixing hole 72 is a circular hole, and is formed in the upper part of the side bracket 7 at the lower side (closer to the third fixing part W3) between the elongated hole 71 and the third fixing part W3.

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

<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 of being stacked with the air bag 31A on the front side and the air bag 31B on the rear side. In the following description, the air bag 31A may be called the "front side air bag 31A" and the air bag 31B may be called the "rear side 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. It mainly has an air chamber 31C into which air supplied from the air chamber 31C enters and a mounting hole 31D as a mounting portion.

The air chamber 31C is formed by welding two sheet-like members together to form a substantially U-shaped contour having a downward concave portion at the center of the upper portion in the left-right direction 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 is inflated so that the air chamber 31C is recessed with its upper left-right central portion facing downward. It is configured to have a concave portion 31E having a similar 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 horizontal direction in the predetermined area H below the upper end of the air chamber 31C. With this configuration, in each of the air bags 31A and 31B, in the predetermined region H, the thickness in the longitudinal direction in the inflated state is smaller at the thickness D1 at the central portion in the left-right direction than at 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. It is longer than the length L1 from the upper end of the air chamber 31C to the lower end of the mounting hole 31D. 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 different from each other when viewed from the front. Thus, they are arranged with a vertical shift even though they are partially overlapped.

Two mounting holes 31D are provided in the upper portions of the air bags 31A and 31B (above the air chamber 31C) so as to be aligned in the horizontal direction. As shown in FIG. 11, the air bags 31A and 31B are stacked in the front-back direction with their upper ends aligned, and screws 92 are passed through the mounting holes 31D. is attached to the pressure receiving member 56 (see also FIG. 9).

A hose 35 is connected via a tubular connector 35C to the air chamber 31C of the front air bag 31A, and a hose 36 is connected via a tubular connector 36C to the air chamber 31C of the rear air bag 31B. . More specifically, as shown in FIG. 13, the hoses 35 and 36 are positioned between the two sheet-like members above the portion to be connected to the air chamber 31C (above the connector 35C in FIG. 13). , passes between two screws 92 (mounting holes 31D) and is connected to the air chamber 31C via connectors 35C and 36C at the bottom of a recess 31E formed in the upper portion of the air chamber 31C. . When viewed from the front, the connector 35C of the front air bag 31A and the connector 36C of the rear air bag 31B are displaced in the left-right direction. As a result, the hoses 35 and 36 are less likely to overlap in the front-rear direction on the front side of the pressure-receiving member 56 , thereby suppressing unnecessary loads 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 plate members 8 (see FIG. 15(a)).
As shown in FIG. 14, the left air bag 31L is formed by welding two resin sheet-like members, like the air bags 31A and 31B. The air bag 31L mainly has an air chamber 31S into which air supplied from the pump 32 is placed, a mounting portion 31T which is a mounting portion for the plate member 8 (seat back side frame 51), and an escape portion 31U. is doing.

The air chamber 31S is formed by welding two sheet-like members in a substantially U-shape having a concave portion that is concave forward in the vertical center portion of the rear portion when viewed from the inside in the left-right direction as shown in FIG. (see welded portion W5).
The attachment portion 31T is a tag-like portion for attaching the air bag 31L to the plate member 8, and is formed to extend rearward from the upper and lower ends of the rear portion of the air bag 31L. The attachment portion 31T (rear end portion) of the air bag 31L is fixed to the plate member 8 by a pin-shaped clip 93, and the plate member 8 is fixed to the seatback side frame 51, thereby attaching the air bag 31L to the seatback side frame 51. installed.

The relief portion 31U is a recess formed in the rear portion of the air bag 31L and having a shape recessed toward the front. (between two mounting portions 31T). In other words, the air bladder 31L has mounting portions 31T above and below the relief portion 31U. In the relief portion 31U, a lower portion serving as another member (part separate from the air bags 31L, 31R and the plate member 8) is engaged with the long hole 71 of the side bracket 7 when the vehicle seat 1 is assembled. It is arranged in a state in which the connecting wire 58 is inserted.

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

Although detailed description is omitted, the right air bag 31R attached to the right seatback 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, a hose 34 for supplying air from the pump 32 to the control unit 33 has one end connected to a delivery port 32A of the pump 32, and includes a pan frame 42, a seat spring 45, and a rear connecting pipe 44 (see FIG. 4). 1), and as shown in FIG.

Hoses 35 and 36 for supplying air from the control unit 33 to the air bags 31A and 31B are connected at one end to the control unit 33, extend upward along the left seat back side frame 51, and extend above the pressure receiving member 56. , and the other end is connected to the air bag 31A or the air bag 31B, respectively, as shown in FIG. As shown in FIG. 8, the hoses 35 and 36 are bundled and held at the oblique 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 center portion in the left-right direction is recessed downward with respect to both end portions, the upper end portion 56T of the pressure-receiving member 56 is passed over the pressure receiving member 56 from the diagonal rear left toward the center in the left-right direction. It is possible to smoothly bend the hoses 35 and 36 that are connected to the upper end portion 56T near the center in the left-right direction. As a result, the hoses 35 and 36 can be arranged compactly in the vertical direction. Furthermore, as shown in FIG. 11 (see also FIG. 7), a recess 56K recessed rearward is formed in the center of the upper front surface of the pressure receiving member 56 in the left-right direction (between the recesses 56B). 56 and the hoses 35 and 36 drawn forward of the pressure receiving member 56 can be prevented from interfering with each other.

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

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

As shown in FIG. 6(a), the hose 37 is fixed to the member frame 52 at several points by 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 a binding band 95A. At the lower left of the fixed portion, the introduction pipe 37A and the left supply pipe 37L are bundled together by a binding band 95B and fixed to the front surface of the rear wall portion 52A. Furthermore, 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 below the bent portion 58A of the lower connecting wire 58 by a binding band 95C.
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 (the left supply pipe 37L and the right supply pipe 37R) is shortened compared to 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. 15(a), the plate member 8 is a substantially plate-like member that regulates the direction in which the air bag 31L inflates, and is arranged adjacent to the outside in the left-right direction of the air bag 31L. The plate member 8 is made of resin and mainly has a body portion 81, a hose fixing portion 82, a frame fixing portion 83, and claw portions 84 and 85. As shown in FIG.

At the upper and lower ends of the rear portion of the main body portion 81, vertically elongated engagement holes 81A with which clips 93 for attaching the air bag 31L (mounting portion 31T) engage are provided. Further, at the rear portion of the body portion 81, more specifically, between the upper and lower engagement holes 81A, there is provided an escape portion 81B that is recessed forward in correspondence with the escape 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 in the side bracket 7 when viewed from the inside in the left-right direction. The rear end of the elongated hole 71 is exposed. Similar to the relief portion 31U of the air bag 31L, the relief portion 81B is arranged in a state in which the lower connecting wire 58 engaged with the elongated hole 71 of the side bracket 7 is inserted when the vehicle seat 1 is assembled. .

As shown in FIG. 15( a ), the front portion of the left-right inner (right) surface of the main body portion 81 has a left-right outer (for the left plate member 8 , a , diagonally forward left) is provided.
The hose fixing portion 82 is a portion to which a binding band 94 (see FIG. 14) that fixes the end of the hose 37 and the connector 37C is attached. 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.

Frame fixing portion 83 and claw portions 84 and 85 are portions for fixing plate member 8 to seatback side frame 51 . The frame fixing portion 83 is formed in a substantially plate-like 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. is provided. The claw portion 84 extends outward in the left-right direction from the front upper end of the outer surface in the left-right direction of the body portion 81 and is bent downward (see also FIG. 15B). The claw portion 85 extends outward in the left-right direction from the lower front end of the outer surface in the left-right direction of the main body portion 81 and is bent rearward (see also FIG. 15(c)). .

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

When attaching the air bag 31L to the seatback side frame 51, first, the air bag 31L (attachment portion 31T) is attached to the plate member 8 (engagement hole 81A) with the clip 93. As shown in FIG. After that, the claw portions 84 and 85 of the plate member 8 to which the air bag 31L is attached are hooked to the rod member 55 fixed to the seatback side frame 51, respectively. The air bag 31L is fixed to the seatback 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 seatback side frame 51. It will be done.

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

<Action of support device>
Next, the action of the support device 3 will be described.
When an occupant sits on the vehicle seat 1 in which the support positions of the air bags 31A and 31B are adjusted, the occupant's upper body (lumbar region), as shown in FIG. It is accommodated in the portion where the thickness of the central portion in the direction is thin, that is, the portion that is recessed with respect to the left and right ends, and is supported by the left and right ends (air chamber 31C) so as to be wrapped from the left and right. In particular, in the present embodiment, the air chambers 31C are formed only at both ends in the left and right direction in the predetermined region H, so that the movable range of the left and right air chambers 31C located within 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 lumbar region of the occupant can be favorably supported from behind.

Further, when the controller (not shown) is operated to adjust the left and right support positions of the waist, especially when the air bags 31L and 31R are inflated, the air bags 31L and 31R try to inflate to both the left and right sides. However, as shown in FIGS. 16(a) to 16(b) (only the air bag 31L is shown), the plate member 8 restricts the outward expansion in the left-right direction, so that the air bag swells inward in the left-right direction. Since the air bags 31L and 31R are covered with a cushioning material and an upholstery material (not shown), the airbags 31L and 31R are pressed by the cushioning material as they are inflated, and the front portions of the airbags 31L and 31R gradually move along the inclined surface 81C of the plate member 8. go. As a result, the air bags 31L and 31R are finally inflated diagonally forward in the left-right direction (see arrows), so that the lumbar region of the occupant can be favorably supported from behind in the left-right direction. can.

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

As shown in FIG. 1, the pump 32 is arranged under the highly rigid pan frame 42 that connects the left and right seat side frames 41, so that when the occupant is seated on the seat 4, the seat springs 45 and Even if the cushion material or the like bends and moves downward, interference between the seat spring 45 and 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 the submarine phenomenon occurs at the time of collision of the vehicle, the occupant and the seat spring 45 are supported by the submarine pipe 43. Therefore, interference between the seat spring 45 and the like and the pump 32 can be suppressed. Further, when the submarine phenomenon occurs, the load from the passenger is received by the submarine pipe 43, so that the load on the pump 32 can be suppressed.

Further, as shown in FIG. 4, since the pump 32 is arranged so that its 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 arranged compactly in the longitudinal direction. As a result, the vehicle seat 1 can be made smaller in the front-rear direction.

In addition, since the pump 32 is provided so that the end provided with the air delivery port 32A is arranged near the center in the left-right direction, the delivery port 32A is located near the center in the left-right direction. Thereby, the length of the hose 34 can be made substantially equal regardless of whether the control unit 33 or the like is arranged on the left or the right. In addition, since the delivery port 32A is positioned closer to the center in the left-right direction, compared to the case where the delivery port 32A is positioned closer to the ends in the left-right direction (closer to the seat side frame 41), the hose 34 leading to the control unit 33 is more likely to move. can be gently bent.

3 and 5, the pump 32 is mounted in a recess 6A of the pump mounting bracket 6, and the pump mounting bracket 6 is mounted in a recess 42A of the pan frame 42. Therefore, the pump 32, the pump mounting bracket 6 and the pan frame 42 can be arranged compactly in the vertical direction. As a result, the vehicle seat 1 can be downsized 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 arranged compactly in the vertical direction. can. This also makes it possible to downsize the vehicle seat 1 in the vertical direction. In addition, compared to a configuration in which the pump 32 and the submarine pipe 43 are arranged side by side in the vertical direction, the assembling workability of the pump 32 and the submarine pipe 43 can be improved.

In addition, since the pan frame 42 and the pump mounting bracket 6 respectively have the concave portion 42A and the concave portion 6A (the convex portion 6B), the pan frame 42 and the pump mounting bracket 6 as a whole form an uneven shape. 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.

Furthermore, as shown in FIG. 4, in this embodiment, the pump 32 is attached to the pump mounting bracket 6 in a state in which the pump 32 is placed in a leather bag 61 having a cushioning property. Interference with the mounting bracket 6 or the like can be suppressed. As a result, for example, the generation of abnormal noise from the seating portion 4 can be suppressed.

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

Although the pump 32 is attached to the pan frame 42 (connection member) via the pump attachment bracket 6 in the above embodiment, the present invention is not limited to this. For example, the pump may be placed in the leather bag 61 of the above embodiment to prevent interference, and then directly attached to the connecting member.

In the above-described embodiment, the pump 32 is arranged in a left-handed state between the left and right seat portion side frames 41, but the present invention is not limited to this. For example, the pump may be positioned rightwardly between the left and right seat side frames.

In addition, in the above-described embodiment, the pump 32 is arranged so that its longitudinal direction faces the left-right direction, but the present invention is not limited to this. For example, the pump may be arranged such that its longitudinal direction faces the front-rear direction.

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

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

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

In the above embodiment, the vehicle seat 1 such as an automobile is shown as an application example of the vehicle seat. can also be applied.

In the above embodiment, the seat portion 2 has the seat portion 4 and the seat back 5 formed separately (the seat back 5 is fixed to the seat portion 4 via the reclining mechanism). is not limited to For example, the seat portion may have a side frame in which the seating portion side frame and the seatback side frame are integrally formed.

Reference Signs List 1 vehicle seat 2 seat portion 3 support device 4 seat portion 5 seat back 6 pump mounting bracket 6A concave portion 6B convex portion 31A air bag 31B air bag 31L air bag 31R air bag 32 pump 32A delivery port 40 seat frame 41 seat side frame 42 pan frame 42A recess 43 submarine pipe

Claims (10)

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 expanding or contracting to change a support position of an occupant,
The seat portion is
Long left and right side frames constituting left and right frames,
A plate member disposed between the air bag and the side frame, the plate member protruding toward the occupant in the short direction from an end of the side frame on the occupant side in the short direction perpendicular to the left-right direction. a plate member ;
The plate member is
a first portion having a first bearing surface;
a second portion extending from the first portion toward the occupant in the lateral direction;
The second portion is a second support surface extending from the first support surface, and the second support is inclined so as to be positioned outward in the left-right direction with respect to the first support surface as the distance from the first support surface increases. having a face,
A vehicle seat, wherein the air bladder contacts the second support surface when inflated. 2. The vehicle seat according to claim 1, wherein said second portion has a claw portion for fixing said plate member to said side frame. 3. The vehicle seat according to claim 2, wherein the second portion has a through hole formed at a position facing the claw portion. 4. The vehicle seat according to claim 2, wherein the claw portion includes a first claw portion and a second claw portion that are attached to the side frame in different directions. 5. The vehicle seat of claim 4, wherein said first portion has an engagement portion for mounting said bladder. The engaging portion includes a first engaging portion formed at one end portion of the first portion in the longitudinal direction of the side frame and a second engaging portion formed at the other end portion of the first portion in the longitudinal direction. including joints and
The distance between said 1st engaging part and said 2nd engaging part is longer than the distance between said 1st claw part and said 2nd claw part, Claim 5 characterized by the above-mentioned. vehicle seat. 7. The vehicle according to claim 5, wherein a laterally outer end portion of the claw portion is positioned further laterally outward than a laterally outer end portion of the engaging portion. sheet for. 8. A vehicle according to any one of claims 1 to 7, wherein a portion of said second support surface is shorter in length in the longitudinal direction of said side frame than said first support surface. sheet for. 2. An occupant-side end of the front end of the air bag in the transverse direction is positioned closer to the occupant in the transverse direction than an occupant-side end of the second portion in the transverse direction. A vehicle seat according to any one of claims 1 to 8. The vehicle seat according to any one of claims 1 to 9, wherein the seat back has a pressure receiving member that receives a load from an occupant.

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