JP5809960B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat provided with a support device capable of adjusting a support position of a passenger's waist.

  Conventionally, a side support portion composed of a base plate and an air bag (air bag) is provided on both sides of a seated occupant, and the support position can be adjusted by adjusting the air pressure of the air bag. Is known (see Patent Document 1). In the automobile seat of Patent Document 1, the air bag is attached to a bracket welded to the frame of the seat back via a base plate.

  Further, conventionally, a pressure receiving member that is provided between the left and right side frames of the seat back and relieves the influence of the rear impact load on the occupant by moving rearward when a predetermined or greater load is applied from the occupant. A vehicle seat provided is known (see Patent Document 2). In the vehicle seat of Patent Document 2, the pressure receiving member is attached to a rotating member attached to the side frame via a wire.

Japanese Patent Laid-Open No. 60-234037 JP 2010-179754 A

  By the way, in the vehicle seat including both the left and right air bags and the pressure receiving member as described above, the number of parts is increased because the left and right air bags and the pressure receiving member are required in addition to the parts for mounting each. There was a problem to do.

  Then, an object of this invention is to provide the vehicle seat which can suppress the increase in a number of parts.

In order to achieve the above-described object, a vehicle seat according to the present invention includes a seat portion having a seating portion and a seat back, and a support device capable of adjusting a support position of an occupant's waist provided in the seat portion. A vehicle seat, which is disposed between left and right seat back side frames constituting left and right frames of the seat back and the left and right seat back side frames, and is capable of moving backward with respect to the seat back side frame. The pressure receiving member provided, the left and right air bags that configure the support device and change the support position by inflating or contracting, and the left and right air bags that are fixed to the seat back side frames and to which the air bags are attached comprising a bracket, wherein the pressure receiving member is attached to the left and right brackets via a mounting member, before The bracket is fixed to the seat back side frame at at least two locations of the first fixing portion and the second fixing portion, and the mounting member engages the mounting member between the first fixing portion and the second fixing portion. A joint portion is provided .

According to such a configuration, it is not necessary to provide the seat back side frame with a bracket for attaching the air bag and a bracket for attaching the pressure receiving member as separate parts, and therefore, an increase in the number of parts can be suppressed. . Moreover, the attachment member engages between the two fixed portions by providing the attachment member engaging portion that the attachment member engages between the first fixed portion and the second fixed portion of the bracket ( Therefore, the mounting member can be stably supported. Thereby, a pressure receiving member can be supported stably.

  In the vehicle seat described above, the bracket is between the first fixing portion and the second fixing portion in a direction in which the first fixing portion and the second fixing portion are arranged, and in a direction orthogonal to the arranging direction. Even the third fixing portion shifted to the position may be fixed to the seat back side frame.

  According to such a configuration, since the bracket is fixed to the seat back side frame by the three fixing portions having a triangular shape, the bracket itself can be stably supported. Thereby, an air bag can be supported stably. Further, since the mounting member can be supported more stably, the pressure receiving member can be supported more stably.

  In the vehicle seat described above, the attachment member engaging portion is formed as an elongated hole extending in the front-rear direction from between the first fixing portion and the second fixing portion toward the third fixing portion, It can be set as the structure inclined toward the downward direction.

  According to such a configuration, the mounting member engaged with the mounting member engaging portion (the long hole) can be positioned at the rear end of the long hole by gravity. Further, since the attachment member engaging portion is formed as a long hole, the attachment member can be attached to the attachment member engaging portion relatively easily, and the assemblability of the vehicle seat can be improved.

  In the vehicle seat described above, the bracket has a configuration in which an air bag fixing portion to which the air bag is fixed is provided near the third fixing portion between the third fixing portion and the elongated hole. be able to.

  According to such a configuration, since the air bag is fixed to the air bag fixing portion provided near the third fixing portion, the air bag can be supported more stably.

  According to the present invention, since the pressure receiving member is attached to the bracket to which the air bag is attached, it is not necessary to provide the bracket for attaching the air bag and the bracket for attaching the pressure receiving member as separate parts. Increase can be suppressed.

  Further, according to the present invention, by providing the attachment member engaging portion that engages the attachment member between the two fixed portions of the bracket, the attachment member can be supported stably, and the pressure receiving member can be stably provided. Can be supported.

  Moreover, according to this invention, the bracket can be stably supported by fixing the bracket to the seat back side frame with the three fixing portions, and the air bag can be stably supported. Further, since the mounting member can be supported more stably, the pressure receiving member can be supported more stably.

  Further, according to the present invention, the attachment member engaging portion is formed into a long hole extending in the front-rear direction and inclined rearward and obliquely downward, so that the attachment member engaged with the attachment member engaging portion is oblong by gravity. Can be positioned at the rear end. Moreover, the assembly property of the vehicle seat can be improved by forming the attachment member engaging portion as a long hole.

  Further, according to the present invention, the air bag fixing portion is provided near the third fixing portion between the third fixing portion of the bracket and the elongated hole (mounting member engaging portion), thereby supporting the air bag more stably. can do.

1 is a perspective view of a vehicle seat according to an embodiment of the present invention. It is the schematic of a support apparatus. It is AA sectional drawing of FIG. It is the figure which looked at the pan frame from the bottom. It is BB sectional drawing of FIG. It is the figure (a) which looked at the seat back frame from the front, and CC sectional view (b) of (a). It is the perspective view which looked at the pressure receiving member and the seat back side frame from diagonally right front. It is the figure which looked at the pressure receiving member and the seat back side frame from back. It is DD sectional drawing of FIG. It is the figure which looked at the left seat back side frame and the side bracket from the left-right direction inner side. It is the figure which looked at the seat back frame, the air bag arrange | positioned behind a passenger | crew, and a pressure receiving member from the front. It is the front view (a) of a front side air bag, and the front view (b) of a back side air bag. It is a perspective view which shows the state which the front side air bag expanded. It is the figure which looked at the left seat back side frame and the air bag from the inner side in the left-right direction. It is the perspective view (a) of a left seat back side frame, a side bracket, a plate member, and an air bag, and the figure (b) and (c) which show the claw part of a plate member. It is the figure which looked at the air bag and plate member which are arrange | positioned on the left side of a passenger | crew from the top, and is the figure (a) which shows the state contracted, and the figure (b) which shows the state expanded.

  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 top and bottom are based on the passenger sitting on the seat.

<Schematic 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 in the seat portion 2. The seat portion 2 mainly includes a seating portion 4 on which an occupant sits, a seatback 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 cushioning material (not shown) made of urethane foam and a skin material (not shown) made of synthetic leather or fabric on the outside of the seating portion frame 40 and the seat back frame 50. It is composed of that. As shown in FIGS. 1 and 2, the support device 3 includes four air bags 31A, 31B, 31L, and 31R and a pump 32 that supplies air (gas) to the air bags 31A, 31B, 31L, and 31R. The air bag 31A, 31B, 31L, 31R mainly includes a control unit 33 that adjusts the amount of bulging, and flexible hoses 34-37.

  The air bags 31 </ b> A and 31 </ b> B are members that support the waist of the occupant seated on the vehicle seat 1 from the rear, and are disposed between the left and right seat back side frames 51. The air bags 31L and 31R are support members that support the occupant's waist from the left or right side, and are disposed 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 backside 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 (all not shown), and the like. doing.

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

  In the support device 3, the valve unit of the control unit 33 is normally closed. When the occupant operates the controller (not shown), the valve unit is opened. When air is supplied from the pump 32, the air bags 31A, 31B, 31L, 31R are inflated and deformed, and the valve unit is opened. When the air bag 31A, 31B, 31L, 31R is pressurized by the occupant in this state, the air bags 31A, 31B, 31L, 31R are contracted and deformed. Thereby, the support position of a passenger | crew's waist | hip | lumbar part can be changed (adjusted). The excess air supplied from the pump 32 to the control unit 33 and the air pushed out 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 seating section>
As shown in FIG. 1, the seat frame 40 includes left and right seat side frames 41 constituting left and right frames of the seat 4, a pan frame 42 as a connecting member, and a submarine pipe 43 ( 3 and 4), a rear connection pipe 44, and a pump mounting bracket 6 (see FIGS. 3 to 5). Each seat part side frame 41 and pan frame 42 are formed by pressing a metal plate, respectively.

  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 portion side frames 41. As shown in FIG. 3, the pan frame 42 has a concave portion 42A that is recessed from the bottom upward. Is 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). A seat spring 45 as an occupant support member for supporting an occupant seated on the seat portion 4 is stretched between the hook portion 42H formed on the pan frame 42 and the rear connection pipe 44 (see also FIG. 1). ).

  The submarine pipe 43 and the rear connection pipe 44 (see FIG. 1) are metal pipes extending in the left-right direction, and are provided between the left and right seating part side frames 41, respectively. The submarine pipe 43 is a member that regulates a 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 crash). Are connected to each other. The submarine pipe 43 is disposed under the pan frame 42, more specifically, in a state of entering the concave portion 42 </ b> A at the rear side of the concave portion 42 </ b> A formed in the pan frame 42. As shown in FIG. 1, the rear connection 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-like member extending in the left-right direction, and has a recess 6 </ b> A that is recessed from the bottom to the top. The pump mounting bracket 6 is attached to the pan frame 42 with the convex portion 6B formed on the back side of the concave portion 6A of the pump mounting bracket 6 entering the concave portion 42A of the pan frame 42 as shown in FIG. ing.
The pump 32 is put in a leather bag 61 having cushioning properties (see FIG. 4), and is attached to the pump mounting bracket 6 in a state of entering the recess 6A of the pump mounting bracket 6 (see also FIG. 5). Accordingly, the pump 32 is disposed under the pan frame 42 in a state where the pump 32 enters the recess 42 </ b> A of the pan frame 42.

  The pump 32 is disposed in front of the recess 42A of the pan frame 42, in other words, in front of the submarine pipe 43 disposed 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 entering the recess 42A of the pan frame 42, that is, arranged so that at least a part thereof overlaps when viewed from the front-rear direction.

  Further, as shown in FIG. 4, the pump 32 is in a state of being moved toward the left side between the left and right seating portion side frames 41 so that the longitudinal direction (the direction in which the cylinder axis extends) faces the left and right direction. The submarine pipe 43 is disposed substantially parallel to the central portion in the left-right direction. The pump 32 has a delivery port 32 </ b> A that is an air outlet, and is attached in such a direction that the delivery port 32 </ b> A is located near the center in the left-right direction between the left and right seating portion side frames 41. That is, in the pump 32, one end portion (left end portion) in the longitudinal direction where the delivery port 32A is not provided is disposed near the left and right ends between the left and right seating portion side frames 41 (the left seating portion side frame 41). The other end portion (right end portion) in the longitudinal direction in which the delivery port 32A is provided is provided so as to be arranged near the center in the left-right direction between the left and right seating portion side frames 41. .

  Under the pan frame 42, the seat spring 45, and the like, the hose 34 connected to the delivery port 32A of the pump 32, the harness 38 that connects the controller and the control unit 33, and the like are attached to the pump mounting bracket 6 at several locations by the binding band 91. Or a seat spring 45 and 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 that constitute 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 two. A pressure receiving member 56 as an air bag attaching member is disposed between the left and right seat back side frames 51.

  Note that in the following description, front and rear and top and bottom are based on an 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-like member that is disposed 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 obliquely upward 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 through the upper connecting wire 57 and the lower connecting wire 58, the seat back side frame 51 and the pipe frame 53. Is attached. 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 56 </ b> D, 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 53A fixed to the pipe frame 53, and the lower connecting wire 58 as an attachment member is a side as a bracket fixed to the inner surface of the seat back side frame 51. It is attached to a bracket 7 (see FIG. 7).

  The pressure receiving member 56 attached as described above is configured so that the upper connecting wire 57 and the lower part of the upper connecting wire 57 are applied by applying a load more than a predetermined amount from the occupant to the rear when the vehicle is bumped from the rear or collides when the vehicle is traveling backward. The bent portion of the connecting wire 58 can be bent 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 the rear impact on the occupant can be mitigated.

  The upper connecting wire 57 is bent behind the pressure receiving member 56 so as to avoid a convex portion 56J on the back side of the concave portion 56B described later, and below the convex portion 56J, the convex portion 56J It engages with a claw 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 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 on the top of a convex portion 56C that protrudes forward from the bottom of a concave portion 56B that is recessed toward the rear formed in the upper portion of the pressure receiving member 56, and holds the air bags 31A and 31B. And a through hole (reference numeral omitted) into which a screw 92 is screwed.

  As shown in FIG. 10, the side bracket 7 is a metal plate-like member to which an air bag 31L (or 31R) to be described later is attached, and has a substantially L shape with the upper portion extending 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 outer side in the left-right direction (the seat back side frame 51).

  In the side bracket 7, the front end of the upper end 7 </ b> A, the front lower end 7 </ b> B, and the rear lower end 7 </ b> C are located near the lower part of the inner surface of each seat back side frame 51 (only one is shown). It is fixed by welding. The first fixed portion W1 and the second fixed portion W2 that are welded portions are provided side by side in the vertical direction, and the third fixed portion W3 that is a welded portion is the vertical direction (the first fixed portion W1 and the second fixed portion W2). 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 aligned, and specifically, It is shifted 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 a chain line). Note that, in the present embodiment, the first fixing portion W1 is provided so as to partially cover the convex portion 51A that protrudes inward in the left-right direction provided on the inner surface of the seat back side frame 51. Thereby, since the mounting rigidity of the side bracket 7 is improved, 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 an attachment member engaging portion with which the end portion 58B of the lower connecting wire 58 engages, and a plate member 8 (see FIG. 15A), which will be described later with the air bags 31L and 31R. The fixing hole 72 as an air bag fixing | fixed part fixed via is mainly provided.
The long 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 part W1 and the second fixing part W2 toward the rear side where the third fixing part W3 is provided. ing. And this long hole 71 inclines toward back diagonally downward.
The fixing hole 72 is a circular hole, and is formed on the upper part of the side bracket 7 on the lower side (closer to the third fixing part W3) between the long hole 71 and the third fixing part W3.

  Although a 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.

<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 stacked on the front side and the air bag 31B 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 together by welding or the like. The air chamber 31 </ b> C into which the air supplied from the air enters and the mounting hole 31 </ b> D as the mounting portion are mainly included.

  As shown in FIG. 12, the air chamber 31C welds two sheet-like members with a substantially U-shaped contour having a concave portion that is recessed downward in the central portion of the upper left and right direction. (See welded portion W4). Thereby, as shown in FIG. 13 (only the front air bag 31A is shown), each air bag 31A, 31B is recessed so that the air chamber 31C has its center portion in the left-right direction downwardly in the expanded state. It has the structure which has the recessed part 31E made into a various shape. In other words, in each of the air bags 31A and 31B, in the predetermined region H below the upper end of the air chamber 31C, the air chamber 31C is formed only at both ends in the left-right direction. With such a configuration, the air bags 31A and 31B in the predetermined region H have a thickness in the front-rear direction in an inflated state that is smaller in the thickness D1 in the center in the left-right direction than in the thickness D2 at both ends in the left-right direction. ing.

  As shown in FIGS. 12 (a) and 12 (b), 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. 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 viewed from the front. Thus, they are arranged so as to be shifted in the vertical direction while partly overlapping.

  The attachment holes 31D are provided at two locations so as to be aligned in the left-right direction (above the air chamber 31C) above the air bags 31A and 31B. As shown in FIG. 11, the air bags 31 </ b> A and 31 </ b> B are attached to the mounting member 56 </ b> A provided in the pressure receiving member 56 by passing a screw 92 through the mounting hole 31 </ b> D in a state where the upper ends of the air bags 31 </ b> A are aligned. Is attached to the pressure receiving member 56 (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, each of the hoses 35 and 36, as shown in FIG. 13, is located between two sheet-like members above a portion to be connected to the air chamber 31C (above the connector 35C in FIG. 13). And 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 portion of the air chamber 31C. . Note that 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 shifted in the left-right direction when viewed from the front. As a result, the hose 35 and the hose 36 are unlikely to overlap each other on the front side of the pressure receiving member 56, so that it is possible to suppress an unnecessary load from being applied to the hoses 35 and 36.

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

As shown in FIG. 14, the air chamber 31S welds two sheet-like members into a substantially U shape having a concave portion that is recessed forward in the center in the vertical direction of the rear as viewed from the inner side in the horizontal direction. (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 end and the lower end of the rear portion of the air bag 31L. The mounting 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 seat back side frame 51. It is attached.

  The escape portion 31U is a concave portion formed in the rear portion of the air bag 31L and recessed toward the front, and is below the upper attachment portion 31T and above the lower attachment portion 31T (that is, 2 Between the two attachment portions 31T). In other words, the air bag 31L has attachment portions 31T above and below the escape portion 31U. 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 is arranged in a state of entering.

  An end portion of the hose 37 is connected to the air chamber 31S (air bag 31L) via a tubular connector 37C formed of metal, resin, or the like. Thereby, 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 a hose fixing portion 82 (to be 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 a 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, the hose 34 for supplying air from the pump 32 to the control unit 33 is connected at one end to the delivery port 32A of the pump 32, and the pan frame 42, the seat spring 45, and the rear connection pipe 44 (see FIG. 4). 1), the other end is connected to the control unit 33 through the back of the seat back frame 50 as shown in FIG.

  The hoses 35 and 36 for supplying air from the control unit 33 to the air bladders 31A and 31B are connected to the control unit 33 at one end and directed upward along the left seat back side frame 51, and above the pressure receiving member 56. As shown in FIG. 11, the other end is 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 the both end portions, the upper end portion 56T is passed over the pressure receiving member 56 from the diagonally left rear toward the center in the left-right direction. The hose 35, 36 can be brought close to the upper end 56T near the center in the left-right direction while being smoothly bent. Thereby, the hoses 35 and 36 can be arrange | positioned compactly in the up-down direction. Further, as shown in FIG. 11 (see also FIG. 7), a concave portion 56K that is recessed rearward is formed at the center in the left-right direction (between the concave portions 56B) of the upper surface of the pressure receiving member 56. Interference between the hose 35 and 36 drawn to the front of the pressure receiving member 56 and the pressure receiving member 56 can be suppressed.

  As shown in FIG. 6A, 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 at one end and disposed along the member frame 52. Thus, the two other branched ends are connected to the air bag 31L or the air bag 31R, respectively. More specifically, the hose 37 (referred to as “introducing pipe 37 </ b> A”) extending from the control unit 33 extends downward along the left seat back side frame 51 and then on the front surface of the rear wall portion 52 </ b> A. It is arrange | positioned so that it may extend toward the center of the left-right direction along. The hose 37 is located near the center of the rear wall 52A (between the left and right seat back side frames 51) in the left-right direction, specifically, slightly to the right and left of the right-side center of the rear wall 52A. Branched. The left supply pipe 37L that connects the branch part 37B and the air bag 31L extends from the branch part 37B under the introduction pipe 37A so that the front surface of the rear wall part 52A extends obliquely upward to the left. The right supply pipe 37R that connects the branch portion 37B and the air bag 31R is disposed so as to extend obliquely upward to the right along the front surface of the rear wall portion 52A from the branch portion 37B.

  As shown in FIG. 6B, the hose 37 (the introduction pipe 37A, the left supply pipe 37L, and the right supply pipe 37R not shown in FIG. 6B) It arrange | positions along the corner | angular part 52C of the bending part formed of the wall part 52A and the flange part 52B. As a result, the hose 37 is covered by the rear wall portion 52A, and particularly in the vicinity of the central portion in the left-right direction of the member frame 52, the upper portion 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 places by binding bands 95A to 95C. Specifically, the introduction pipe 37A is fixed to the center in the left-right direction on the lower surface of the flange portion 52B by a binding band 95A. In addition, 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 respectively fixed to the front surface of the rear wall portion 52A by a binding band 95C below the bent portion 58A of the lower connecting wire 58.
The binding band 95C is provided at 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 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-like member that regulates the direction in which the air bag 31L inflates, and is disposed adjacent to the outer side in the left-right direction of the air bag 31L. The plate member 8 is made of resin and mainly includes a main body portion 81, a hose fixing portion 82, a frame fixing portion 83, and claw portions 84 and 85.

  Engagement holes 81A that are long in the vertical direction are provided at the upper and lower ends of the rear part of the main body 81 and engage with a clip 93 for attaching the air bag 31L (attachment part 31T). Further, a relief portion 81B having a shape recessed toward the front is provided between 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. Yes. As shown in FIG. 14, the escape portion 81B is formed so as to substantially overlap the escape 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 inner side in the left-right direction. The rear end of the elongated hole 71 is faced. Similar to the escape portion 31U of the air bag 31L, the escape portion 81B is arranged with a lower connecting wire 58 that engages with the elongated hole 71 of the side bracket 7 when the vehicle seat 1 is assembled. .

As shown in FIG. 15A, the front part of the surface on the inner side (right side) in the left-right direction of the main body 81 has an outer side in the left-right direction (speaking of the left plate member 8) with respect to the rear part extending substantially in the front-back direction. , An inclined surface 81C extending toward the left front).
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 rearward from a lower portion in the vertical direction of the bottom of the escape portion 81B. It is formed to extend. The hose fixing portion 82 is provided with a through hole (reference numeral omitted) in 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 escape portion 81B, and has a through hole (reference numeral omitted) through which the screw 96 is inserted. Is provided. The claw portion 84 is formed so as to extend from the front upper end of the surface on the outer side in the left-right direction of the main body portion 81 toward the outer side in the left-right direction and bend downward (see also FIG. 15B). Further, the claw portion 85 is formed so as to extend from the lower portion of the front end of the surface on the outer side in the left-right direction of the main body portion 81 toward the outer side in the left-right direction and bend toward the rear (see also FIG. 15C). .

  When the plate member 8 is attached to the seat back side frame 51, these claw portions 84 and 85 are hooked to 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 extension portion 55A extending in the substantially front-rear direction of the rod member 55, and the claw portion 85 is engaged in the second extension portion 55B extending in the substantially vertical direction of the rod member 55. It comes to be caught from the front.

  When attaching the air bag 31L to the seat back side frame 51, first, the air bag 31L (attachment portion 31T) is attached to the plate member 8 (engagement hole 81A) by the clip 93. Thereafter, the claw portions 84 and 85 of the plate member 8 to which the air bladder 31L is attached are respectively hooked on the rod members 55 fixed to the seat back side frame 51. 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 into the fixing hole 72 of the side bracket 7 fixed to the seat back side frame 51. Will be.

  Although a 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.

<Operation of support device>
Next, the operation 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, as shown in FIG. 13, the occupant's upper body (waist part) It fits in a portion where the thickness of the central portion in the direction is thin, that is, a portion which is recessed with respect to both ends in the left-right direction, and is supported so as to be wrapped from the left and right by both ends in the left-right direction (air chamber 31C). In particular, in the present embodiment, in the predetermined region H, the air chambers 31C are formed only at both ends in the left-right direction, so 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 occupant's upper body. Thereby, a passenger | crew's waist | hip | lumbar part can be supported suitably from back.

  Further, when the left and right support positions of the waist are adjusted by operating a controller (not shown), especially when the air bags 31L and 31R are inflated, the air bags 31L and 31R try to inflate to 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, and as a result, the inflates inward in the left-right direction. Since the air bags 31L and 31R are covered with a cushioning material or a skin material (not shown), the air bags 31L and 31R are pressed by the cushioning material and the like as they inflate, and the front part gradually extends along the inclined surface 81C of the plate member 8. Go. As a result, the air bags 31L and 31R eventually inflate toward the diagonally forward side (see arrows) on the inner side in the left-right direction, so that the occupant's waist can be suitably supported from the diagonally rearward direction in the left-right direction. it can.

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

  As shown in FIG. 7, since the pressure receiving member 56 is attached to the side bracket 7 for attaching the air bags 31L and 31R via the lower connecting wire 58, the bracket for attaching the air bags 31L and 31R. And it is not necessary to provide the bracket for attaching the pressure receiving member 56 as a separate part. Thereby, the increase in the number of parts of the vehicle seat 1 can be suppressed.

  Further, as shown in FIG. 10, since the elongated hole 71 with which the lower connecting wire 58 is engaged is provided between the first fixing portion W1 and the second fixing portion W2 of the side bracket 7, the lower connecting wire 58 stable support is possible. Thereby, the pressure receiving member 56 can be supported stably.

  Further, since the side bracket 7 is fixed to the seat back side frame 51 by the three fixing portions W1 to W3 having a triangular shape, the side bracket 7 itself can be stably supported. Thereby, the air bags 31L and 31R can be stably supported. Further, since the lower connecting wire 58 can be supported more stably, the pressure receiving member 56 can be supported more stably.

  Further, since the elongated hole 71 is inclined rearward and obliquely downward, the lower connecting wire 58 engaged with the elongated hole 71 can be positioned at the rear end of the elongated hole 71 by gravity. In addition, since the portion with which the lower connecting wire 58 is engaged is formed as the long hole 71, the vertically long end 58B that is bent substantially downward in the drawing can be attached to the side bracket 7 relatively easily. . Thereby, the assembly property of the vehicle seat 1 can be improved.

  Moreover, since the fixing hole 72 for fixing the air bags 31L and 31R is provided near the third fixing part W3 between the third fixing part W3 and the elongated hole 71, the air bags 31L and 31R are connected to the third fixing part W3. It can be fixed near the fixing portion W3. Thereby, air bags 71L and 71R can be supported more stably.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. About a concrete structure, it can change suitably in the range which does not deviate from the meaning of this invention.

  In the embodiment, the lower connecting wire 58 positioned at the rear end of the long hole 71 is located outside the triangle (see FIG. 10) formed by the three fixing portions W1 to W3. However, if it demonstrates with reference to FIG. 10, it is more desirable that the edge part of the lower connection wire 58 (attachment member) is located inside the triangle formed by the three fixing | fixed part W1-W3. According to this, it becomes possible to support the lower connecting wire 58 (pressure receiving member 56) more stably.

  In the said embodiment, although the elongate hole 71 was illustrated as an attachment member engaging part, this invention is not limited to this, For example, a substantially circular hole may be sufficient as side view. Further, the end portion of the wire-like attachment member may be bent upward or downward along the seat back side frame and the attachment member engaging portion configured to hook the bent portion. Good.

  In the said embodiment, although the side bracket 7 was being fixed to the seat back side frame 51 at three places, this invention is not limited to this. For example, referring to FIG. 10, the side bracket 7 may be fixed to the seat back side frame 51 at only two locations of the first fixing portion W1 and the second fixing portion W2, or at four or more locations. It may be fixed to the seat back side frame 51. For example, when a wide series of welding areas can be secured, the seat back side frame 51 may be fixed at one place.

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

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

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat part 3 Support apparatus 4 Seat part 5 Seat back 7 Side bracket 31L Air bag 31R Air bag 50 Seat back frame 51 Seat back side frame 56 Pressure receiving member 58 Lower connection wire 71 Long hole 72 Fixed hole W1 1st Fixed part W2 Second fixed part W3 Third fixed part

Claims (4)

A vehicle seat comprising: a seat portion having a seating portion and a seat back; and a support device capable of adjusting a support position of an occupant's waist provided in the seat portion,
Left and right seat back side frames constituting left and right frames of the seat back;
A pressure receiving member disposed between the left and right seat back side frames and provided so as to be movable backward with respect to the seat back side frame;
Left and right air bags that configure the support device and change the support position by inflating or contracting;
Left and right brackets fixed to each seat back side frame and to which the air bag is attached,
The pressure receiving member is attached to the left and right brackets via an attachment member ,
The bracket is fixed to the seat back side frame at at least two locations of the first fixing portion and the second fixing portion, and the mounting member is engaged between the first fixing portion and the second fixing portion. A vehicle seat characterized in that an engagement portion is provided . The bracket includes a third fixing portion that is between the first fixing portion and the second fixing portion in a direction in which the first fixing portion and the second fixing portion are arranged and is shifted in a direction orthogonal to the arranging direction. However, the vehicle seat according to claim 1 , wherein the vehicle seat is fixed to the seat back side frame. The attachment member engaging portion is formed as an elongated hole extending in the front-rear direction from the space between the first fixing portion and the second fixing portion toward the third fixing portion, and is inclined rearward and obliquely downward. The vehicle seat according to claim 2 , wherein the vehicle seat is provided. The bracket according to claim 3, and the third fixing portion to the third fixing portion closer between the elongated hole, said air bag, characterized in that the air bag fixing portion fixed is provided Vehicle seats.

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