JP2023077884A - Vehicle seat, air-bag module support structure and assemble method of vehicle seat - Google Patents

Abstract

To provide a vehicle seat which includes an air bag module, a webbing and a wire member for binding the webbing to a side frame and, therein, facilitates confirmation of connection between the wire member and the side frame upon assembling.SOLUTION: A vehicle sheet includes a side frame 17, a bracket 50 provided with a bracket side connection part 55 connected with the side frame 17 and a bracket side flat plate part 56 formed of a latch hole, a wire member provided with a latch part 65 latched to the latch hole, a retainer 52 provided with a retainer side connection part 70 connected with the bracket side connection part and a retainer side flat plate part 71, an air bag module 12, a pad member 10, an epidermal material 11 and a webbing 42 engaged on an extension part. Therein, notch parts 60, 80 are provided respectively at the rear side of the latch hole on the retainer side connection part and the bracket side connection part.SELECTED DRAWING: Figure 3

Description

The present invention relates to a vehicle seat having an airbag, an airbag module support structure, and a vehicle seat assembly method.

2. Description of the Related Art There is a vehicle seat for a rear seat in which an airbag that deploys forward is provided in a seat back (for example, Patent Document 1). The vehicle seat of Patent Document 1 includes a pair of left and right side frames that form the skeleton of the seat back, an airbag module attached to the side frames, and a stress caused by the expansion of the airbag during deployment, which is applied to the fractured portion of the skin material. A webbing for transmission and a linear member for connecting the webbing to the side frame are provided. Both ends of the linear member are hooked to through-holes provided in the side frames or to edges thereof.

Japanese Patent No. 5169864

In such a vehicle seat, it is preferable to bring the connecting portion between the linear member and the webbing closer to the front edge of the side frame in order to appropriately guide the deployment direction of the airbag. Furthermore, in order to effectively transmit the load applied to the linear member when the airbag deploys to the side frame, it is preferable to bring the connecting portion between the linear member and the side frame closer to the front edge of the side frame.

A vehicle seat is assembled by placing a cushioning pad member on the front side of a side frame and then covering it with a skin member. If the connecting position between the linear member and the side frame is provided near the front edge of the side frame, the linear member (wire member) can be properly latched to the side frame after the pad member is arranged on the front side of the side frame. It is difficult to confirm whether

In view of the above background, the present invention provides a vehicle seat having an airbag module, a webbing, and a wire member for coupling the webbing to a side frame, and confirms the coupling between the wire member and the side frame during assembly. The task is to make it easier to

In order to solve the above-mentioned problems, a vehicle seat (1) according to the present invention is provided with a seat frame (9) including a pair of left and right side frames (17), which is coupled to one of the side frames so as to extend left and right outward. A bracket comprising an extending bracket-side connecting portion (55) and a plate-like bracket-side flat plate portion (56) extending forward from left and right outer edges of the bracket-side connecting portion and formed with a hooking hole penetrating left and right. (50), a hooking portion (65) hooked to the hooking hole, and an extension portion (66) extending forward from the hooking portion along the left and right outer surfaces of the bracket-side flat plate portion. a member, a retainer-side connection portion (70) coupled to the one of the side frames or the bracket-side connection portion and extending outward to the left and right of the bracket-side flat plate portion, and extending forward from the retainer-side connection portion, a retainer (52) having a retainer-side flat plate portion (71) facing the bracket-side flat plate portion via the wire member; an airbag module (12) coupled to left and right outer surfaces of the retainer-side flat plate portion; a pad member (10) supported on the front side of the seat frame; a skin material (11) covering the front surface of the pad member; A webbing (42) having a locked other end, and a notch (60, 80) is provided.

According to this aspect, the retainer-side connecting portion and the bracket-side connecting portion are provided with the retainer-side cutout portion that penetrates in the front-rear direction at a position aligned with the hooking hole, so that the hooking portion can be viewed from behind the retainer and the bracket. can be seen to be hooked in the hooking hole. As a result, it is possible to easily check whether the wire member and the side frame are properly connected during assembly.

Further, according to one aspect of the present invention, the bracket preferably has a bracket front end portion (59) coupled to the side frame from the front edge of the bracket-side flat plate portion.

According to this aspect, the connection between the bracket and the side frame becomes stronger. As a result, the airbag module is more firmly supported by the side frames, and the deployment direction of the airbag is stabilized.

Moreover, according to one aspect of the present invention, the bracket and the side frame may be integrally formed.

According to this aspect, the number of parts constituting the vehicle seat can be reduced, and the configuration of the vehicle seat is simplified.

Further, according to one aspect of the present invention, the bracket-side connecting portion extends obliquely forward from the bracket-side connecting portion (57) connected to the rear surface of the side frame and from the left and right outer edges of the bracket-side connecting portion. A bracket side slope portion (58) may be provided, the bracket side flat plate portion may be connected to the front edge of the bracket side slope portion, and the retainer side connection portion may be fastened to the left and right outer surfaces of the bracket side slope portion. .

When the airbag deploys, a reaction force directed rearward from the airbag is applied to the connecting portion. According to this aspect, by providing the bracket-side sloping surface portion in the bracket-side connection portion, it is possible to reliably resist the rearward reaction force applied from the airbag. As a result, the airbag can be deployed more appropriately. In addition, since the bracket-side sloped portions extend obliquely forward from the left and right outer edges, the retainer-side connection portion and the bracket-side sloped portions can be fastened from behind the bracket and the retainer, and the bracket-side sloped portions can be fastened to the left and right outside of the bracket and the retainer. The amount of protrusion from the side frame to the side frame can be reduced, and the width of the vehicle seat in the left-right direction can be reduced.

Further, according to one aspect of the present invention, a webbing engaging portion (68) to which the webbing is engaged is provided at the front end of the extension portion, and the webbing engaging portion is the retainer-side flat plate portion. and in front of the front edge of the bracket-side flat plate portion.

According to this aspect, the webbing engaging portion is provided in front of the front edge of the retainer-side flat plate portion and in front of the front edge of the bracket-side flat plate portion, so that the retainer-side flat plate portion and the bracket-side flat plate portion interfere with each other. The webbing can be easily locked to the webbing locking portion without being pulled.

Further, according to an aspect of the present invention, the webbing engaging portion may be positioned laterally outward with respect to the engaging portion.

According to this aspect, since the webbing engaging portion is positioned further away from the side frame, the webbing engaging portion is less likely to come into contact with the side frame. As a result, it is possible to prevent the occurrence of abnormal noise due to contact between the webbing engaging portion and the side frame.

Further, according to an aspect of the present invention, the webbing engaging portion may be in contact with left and right inner side surfaces of the airbag module.

According to this aspect, by bringing the webbing engaging portion into contact with the side surface of the airbag module, the swinging motion of the webbing engaging portion can be suppressed. As a result, the webbing engaging portion is less likely to come into contact with the side frame, and abnormal noise due to contact between the webbing engaging portion and the side frame can be prevented.

In order to solve the above problems, an airbag module support structure (23) according to the present invention is connected to the left and right outer surfaces of a frame (9) forming the framework of a vehicle seat, and extends outward in the left and right direction. (55), and a bracket (50) having a bracket-side flat plate portion (56) extending forward from the left and right outer edges of the bracket-side connection portion and formed with a latching hole penetrating left and right; a wire member (51) having a hooking portion (65) hooked to the hooking hole and an extension portion (66) extending forward from the hooking portion along the left and right outer surfaces of the bracket-side flat plate portion; , a retainer-side connection portion (70) coupled to the frame or the bracket-side connection portion and extending laterally outward from the bracket-side flat plate portion; and extending forward from the retainer-side connection portion to the bracket-side flat plate portion. and a retainer (52) having retainer-side flat plate portions (71) facing each other via the wire member, and the retainer-side connecting portion and the bracket-side connecting portion are positioned in alignment with the engaging holes, respectively. Notch portions (60, 80) penetrating in the front-rear direction are preferably provided.

According to this aspect, the retainer-side connecting portion and the bracket-side connecting portion are provided with the retainer-side cutout portion that penetrates in the front-rear direction at a position aligned with the hooking hole, so that the hooking portion can be viewed from behind the retainer and the bracket. can be seen to be hooked in the hooking hole. As a result, it is possible to easily check whether the wire member and the side frame are properly connected during assembly.

In order to solve the above-mentioned problems, a method for assembling a vehicle seat (1) according to the present invention comprises: a seat frame (9) including a pair of left and right side frames; and brackets coupled to the side frames and extending left and right outward. A bracket (50) comprising a side connection portion (55) and a bracket side flat plate portion (56) having a plate shape extending forward from the left and right outer edges of the bracket side connection portion and having a hooking hole penetrating left and right. ), a wire member ( 51), a retainer-side connection portion (70) coupled to the side frame or the bracket-side connection portion and extending laterally outward from the bracket-side flat plate portion, and extending forward from the retainer-side connection portion to the bracket-side connection portion (70). a retainer (52) having a retainer-side flat plate portion (71) opposed to a side flat plate portion via the wire member, and the retainer-side connecting portion and the bracket-side connecting portion are aligned with the latching holes. A method for assembling a seat frame provided with notches (60, 80) penetrating in the longitudinal direction at positions where the and coupling the retainer-side connecting portion to the side frame or the bracket-side connecting portion.

According to this aspect, the retainer-side connection portion and the bracket-side connection portion are provided with the retainer-side cutout portion that penetrates in the front-rear direction at a position aligned with the latching hole. It can be visually recognized from behind that the hooking portion is hooked to the hooking hole. As a result, it is possible to easily check whether the wire member and the side frame are properly connected during assembly.

According to the above aspect, the vehicle seat includes a seat frame including a pair of left and right side frames, a bracket-side connection portion coupled to the side frames and extending left and right outward, and a bracket-side connection portion extending forward from the left and right outer edges of the bracket-side connection portion. A bracket having a plate-like shape extending vertically and having a bracket-side flat plate portion formed with a hooking hole penetrating left and right, a hooking portion hooked to the hooking hole, and a bracket-side flat plate portion extending from the hooking portion. A wire member having an extension portion extending forward along the left and right outer surfaces, a retainer side connection portion coupled to the side frame or the bracket side connection portion and extending left and right outward of the bracket side flat plate portion, and forward from the retainer side connection portion. an airbag module coupled to the left and right outer surfaces of the retainer-side flat plate portion; and an airbag module supported on the front side of the seat frame. A retainer-side connection comprising a pad member, a skin material covering the front surface of the pad member, and a webbing having one end sewn to the skin material and the other end locked to the extension of the wire member. According to the configuration in which the portion and the bracket-side connection portion are respectively provided with notches penetrating in the front-rear direction behind the hooking hole, the retainer-side connection portion and the bracket-side connection portion are aligned with the hooking hole. By providing the retainer-side notch portion penetrating in the front-rear direction, it is possible to visually recognize that the hooking portion is hooked to the hooking hole from behind the retainer and the bracket. As a result, it is possible to easily check whether the wire member and the side frame are properly connected during assembly.

Further, in the above-described aspect, the bracket has a bracket front end portion that is connected to the side frame from the front edge of the bracket-side flat plate portion, whereby the connection between the bracket and the side frame becomes stronger. As a result, the airbag module is more firmly supported by the side frames, and the deployment direction of the airbag is stabilized.

Further, in the above aspect, the bracket and the side frame are integrally formed, so that the number of parts constituting the vehicle seat can be reduced, and the configuration of the vehicle seat is simplified.

In the above aspect, the bracket-side connecting portion has a bracket-side connecting portion that is connected to the rear surface of the side frame, and a bracket-side slope portion that extends obliquely forward from the left and right outer edges of the bracket-side connecting portion. The flat plate portion is connected to the front edge of the bracket-side slope portion, and the retainer-side connection portion is fastened to the left and right outer surfaces of the bracket-side slope portion. The rearward reaction force applied from the bag can reliably counteract it. As a result, the airbag can be deployed more appropriately. In addition, since the bracket-side sloped portions extend obliquely forward from the left and right outer edges, the retainer-side connection portion and the bracket-side sloped portions can be fastened from behind the bracket and the retainer, and the bracket-side sloped portions can be fastened to the left and right outside of the bracket and the retainer. The amount of protrusion from the side frame to the side frame can be reduced, and the width of the vehicle seat in the left-right direction can be reduced.

Further, in the above aspect, the webbing engaging portion for engaging the webbing is provided at the front end of the extension portion, and the webbing engaging portion is located in front of the front edge of the retainer-side flat plate portion and at the bracket-side flat plate portion. According to the configuration located in front of the front edge of the retainer side, the webbing engaging portion is provided in front of the front edge of the retainer side flat plate portion and in front of the front edge of the bracket side flat plate portion, so that the retainer side The webbing can be easily locked to the webbing locking portion without being hindered by the flat plate portion and the bracket-side flat plate portion.

Further, in the above-described aspect, according to the configuration in which the webbing engaging portion is positioned laterally outward with respect to the engaging portion, the webbing engaging portion is located further away from the side frame. The cloth engaging portion is less likely to come into contact with the side frame. As a result, it is possible to prevent the occurrence of abnormal noise due to contact between the webbing engaging portion and the side frame.

Further, in addition to the above configuration, according to the configuration in which the webbing engaging portion is in contact with the left and right inner side surfaces of the airbag module, the webbing engaging portion is brought into contact with the side surface of the airbag module. , it is possible to suppress the rocking motion of the webbing engaging portion. As a result, the webbing engaging portion is less likely to come into contact with the side frame, and abnormal noise due to contact between the webbing engaging portion and the side frame can be prevented.

In order to solve the above-described problems, an airbag module support structure according to the present invention is provided. and a bracket having a bracket-side plate portion extending forward from the left and right outer edges of the bracket-side connection portion and having a bracket-side flat plate portion formed with a hooking hole penetrating left and right, and a hook hooked to the hooking hole. A wire member having a stop portion and an extension portion extending forward along the left and right outer surfaces of the bracket-side flat plate portion from the hook portion; a retainer side connecting portion extending laterally outward; and a retainer including a retainer side flat plate portion extending forward from the retainer side connecting portion and facing the bracket side flat plate portion via the wire member; Since the retainer-side connection portion and the bracket-side connection portion are provided with cutout portions that penetrate in the front-rear direction at positions aligned with the latching holes, the retainer-side connection portion and the bracket-side connection portion have By providing the retainer-side notch portion that penetrates in the front-rear direction at a position aligned with the hooking hole, it is possible to visually recognize that the hooking portion is hooked to the hooking hole from behind the retainer and the bracket. . As a result, it is possible to easily check whether the wire member and the side frame are properly connected during assembly.

In order to solve the above-described problems, a method for assembling a vehicle seat according to the present invention comprises a seat frame including a pair of left and right side frames, a bracket-side connection portion coupled to the side frames and extending left and right outward, and a bracket having a bracket-side plate portion extending forward from the left and right outer edges of the bracket-side connection portion and having a bracket-side flat plate portion formed with a hooking hole penetrating from left to right; a hooking portion hooked to the hooking hole; and a wire member having an extension portion extending forward along the left and right outer surfaces of the bracket-side flat plate portion from the hook portion, and a retainer side coupled to the side frame or the bracket-side connection portion and extending left and right outward of the bracket-side flat plate portion. and a retainer having a retainer-side flat plate portion extending forward from the retainer-side connection portion and facing the bracket-side flat plate portion via a wire member. A method for assembling a seat frame having notches penetrating in the longitudinal direction at positions aligned with hooking holes, the method comprising steps of hooking a base end of a wire member to the hooking holes; The retainer-side notch is provided in the retainer-side connection and the bracket-side connection so as to align with the latching hole and pass through in the front-rear direction. Thus, after the seat frame is assembled, it can be visually recognized from behind the retainer and the bracket that the hooking portion is hooked to the hooking hole. As a result, it is possible to easily check whether the wire member and the side frame are properly connected during assembly.

1 is a perspective view of a vehicle seat according to the present invention; FIG. 1 is a perspective view of a seat back frame of a vehicle seat according to the present invention; FIG. III-III sectional view of FIG. Perspective view of the vicinity of the airbag module of the seatback frame when viewed from the rear Rear view near the airbag module of the seatback frame Perspective view of the vicinity of the bracket as viewed from the front immediately after the bracket is joined to the lower part of the side frame Fig. 2 is a perspective view of the vicinity of the bracket as viewed from the front immediately after the wire member is coupled to the bracket; A perspective view of the vicinity of the bracket as viewed from the front immediately after the retainer and airbag module are coupled to the bracket. 1 is a perspective view of a rear seat to which a vehicle seat according to the present invention is applied; FIG. 1 is a perspective view of a seatback frame of a rear seat to which a vehicle seat according to the present invention is applied; FIG. A perspective view showing a modified example in which the airbag module is provided on the seat cushion.

An embodiment in which a vehicle seat according to the present invention is applied to a passenger seat of an automobile will be described below with reference to the drawings. In the following description, front and rear, left and right, and up and down directions are described with reference to the front of the person sitting on the vehicle seat. In addition, the left and right outward means the left and right direction away from the seated person, and the left and right inner and left and right directions mean the direction closer to the seated person.

As shown in FIG. 1, a vehicle seat 1 according to the present invention is provided on a floor 2 of an automobile, includes a seat cushion 4 that supports the buttocks of a person sitting on the seat, and a backrest supported by the rear portion of the seat cushion 4. It has functional seat backs 5 and headrests 6 provided on top of each seat back 5 .

The seat back 5 extends vertically and has a substantially rectangular parallelepiped shape with a surface facing forward. A support surface 7 is formed on the front surface of the seat back 5 to support the back of the occupant. The seat back 5 is rotatably coupled at its lower end to the rear end of the frame forming the seat cushion 4 via a known reclining mechanism.

Next, the structure of the seat back 5 will be described with reference to FIGS. 2, 3 and 4. FIG. As shown in FIG. 3 , the seatback 5 includes a seatback frame 9 as a skeleton, a pad member 10 supported by the seatback frame 9 (seat frame), and provided on the surface of the pad member 10 . and an airbag module 12 supported by the seat back frame 9 .

As shown in FIG. 2, the seatback frame 9 forms the skeleton of the seatback 5 and includes a seatback frame portion 15 having a substantially rectangular frame shape. The seat back frame portion 15 includes a pair of left and right side frames 17 (side members) extending vertically, an upper frame 18 extending horizontally and serving as a cross member coupled to the upper ends of the left and right side frames 17, and an upper frame 18 extending horizontally. and a lower frame (not shown) as a cross member coupled to the lower portions of the left and right side frames 17 respectively. The side frame upper portion 17U and the upper frame 18, which respectively constitute the upper portions of the left and right side frames 17, are formed by bending one circular pipe member 19 into an inverted U-shaped gate shape. A side frame lower portion 17D, which constitutes the lower portion of each of the left and right side frames 17, is formed of a sheet metal member 20 having a surface facing in the horizontal direction. The sheet metal member 20 is welded to the end of the pipe material 19 at the upper portion thereof on the inner surface of the sheet. The front and rear edges of the sheet metal member 20 are each bent toward the inside of the seat. The lower ends of the left and right side frames 17 are rotatably coupled to the frame forming the seat cushion 4 via a reclining mechanism.

An elastic member 21 is stretched between the left and right side frames 17 . A plate-shaped bridging member 22 having a main surface facing in the front-rear direction is provided on the front surface of the elastic member 21 . The bridging member 22 is displaced forward and backward with respect to the side frame 17 by the elastic force of the elastic member, and supports the back of the occupant with the elastic force. In the present embodiment, the bridging member 22 is formed using a plate-like member, but is not limited to the plate-like member, and may be a known structure formed by a structure (for example, a spring or the like) that provides a lumbar support function. you can

The airbag module 12 is coupled via an airbag module support structure 23 to the left side surface of the left side frame lower portion 17D. The airbag module 12 has a substantially rectangular parallelepiped shape extending along the extending direction of the side frame 17, and is arranged so that at least one of its longitudinal surfaces faces outward (to the left) of the seat.

As shown in FIG. 3, the airbag module 12 accommodates an airbag 25, an inflator 26 that releases gas into the airbag 25 and inflates and deploys the airbag 25 forward, and the airbag 25 and the inflator 26. A substantially rectangular parallelepiped case 27 is provided. The inflator 26 has a substantially cylindrical shape and has a male screw portion 28 projecting radially outward from its outer peripheral surface.

The case 27 has a substantially rectangular parallelepiped shape and is composed of a case body 30 having an opening on the left side and a resin lid 31 covering the opening of the case body 30 . The case body 30 is in the shape of a substantially rectangular cylinder with a bottom including a substantially rectangular bottom wall 30A and side walls connected to the outer periphery of the bottom wall. The outer surface of the case body 30 including the outer surface of the bottom wall 30A is covered with resin. A through hole 30B is provided at a predetermined position in the bottom wall of the case main body 30 so as to extend therethrough in the thickness direction. The airbag 25 is folded and housed in the case body 30 .

The lid body 31 has a substantially rectangular shape and is made of a resin plate facing in the left-right direction. In the present embodiment, a cylindrical portion 31A that protrudes toward the case body 30 in a rectangular shape and fits into the opening of the case body 30 is coupled to the outer peripheral edge of the lid 31 . A plurality of locking claws 31B projecting outward in the circumferential direction are formed on the outer peripheral surface of the tubular portion. A plurality of through holes 30C are provided in the side wall of the case main body 30, and the engaging claws are respectively engaged with the through holes. Thereby, the lid body 31 is coupled to the case main body 30 .

The lid 31 is provided with groove-shaped fragile portions 31C along its front edge and upper and lower edges, and a thin hinge 31D along its rear edge. As a result, when a leftward load is applied to the lid 31, the lid 31 splits at the fragile portion 31C, the central portion of the lid 31 rotates around the hinge 31D, and the case body 30 opens. .

The pad member 10 is made of a flexible cushioning material such as polyurethane foam. The pad member 10 includes, as shown in FIG. 3 , a front surface portion 34 located behind the support surface 7 and a left side surface portion 35 extending rearward from the left edge of the front surface portion 34 . The front portion 34 and the left side portion 35 are formed of separate cushion materials. The front part 34 passes through the front of the side frame 17 and extends left front of the airbag module 12 . The left side portion 35 extends rearward from the left front of the airbag module 12 , passes through the left side of the airbag module 12 , and reaches the left rear end of the side frame 17 .

The skin material 11 is formed by stitching together a plurality of sheet-like members such as cloth and leather. The skin material 11 has a front sheet material 37 covering the surface of the front part 34 and a left side sheet material 38 covering the left side of the left side part 35 . The left edge of the front sheet material 37 and the front edge of the left side sheet material 38 are stitched together to form a stitched portion 40 . The sewn portion 40 functions as a fragile portion of the skin material 11 that breaks under a smaller load than other sewn portions. As shown in FIG. 1 , the sewn portion 40 extends vertically along the left front edge of the seat back 5 .

The vehicle seat 1 is provided with a webbing 42 for guiding deployment of the airbag 25 . The webbing 42 is a member made of cloth, and its end is sewn to the sewn portion 40 and is coupled to the side frame 17 via the airbag module support structure 23 . As a result, when the airbag 25 inflates forward, a load is applied to the webbing 42 and the stitched portion 40 is torn.

On the rear side of the seat back frame 9, a back sheet material 44 is provided which is formed of a sheet-like member such as cloth or leather, like the upholstery material 11. As shown in FIG. One end of the back sheet material 44 is joined to the rear edge of the left side sheet material 38 via a line fastener 46 .

As shown in FIG. 1, a sensor 47 is provided under the vehicle seat 1 to detect the load applied to the passenger seated in the front passenger seat. The sensor 47 may be, for example, a tension sensor that detects tension applied to the seat belt worn by the occupant, or an acceleration sensor that detects acceleration applied to the vehicle seat 1 . A control device 48 that is electrically connected to the sensor 47 and the inflator 26 and controls driving of the inflator 26 based on the load detected by the sensor 47 is provided under the vehicle seat 1 . Although the sensor 47 and the control device 48 are provided on the vehicle seat 1 in the present embodiment, they may be provided at any position of the vehicle on which the vehicle seat 1 is mounted.

Next, the airbag module support structure 23 will be described in detail. As described above, the airbag module support structure 23 has the function of connecting the airbag module 12 to the side frame 17 and connecting the webbing 42 to the side frame 17 . In the following description of the airbag module support structure 23, the front side (supporting surface side) of the seatback frame 9 is referred to as the front side, and the back side of the seatback frame 9 is referred to as the rear side. Furthermore, the vertical direction is described with reference to the extending direction of the side frame 17 .

As shown in FIG. 3, the airbag module support structure 23 includes a bracket 50 provided on the side frame lower portion 17D, a wire member 51 for connecting the webbing 42 to the bracket 50, and a retainer 52 for holding the airbag module 12. and

The bracket 50 is a bent sheet metal member and constitutes a part of the side frame 17 . The bracket 50 is joined to the rear surface of the side frame lower portion 17D and has a plate shape extending forward from a bracket side connecting portion 55 extending leftward of the side frame lower portion 17D and a left edge (left and right outer edge) of the bracket side connecting portion 55. and a bracket-side flat plate portion 56 . The bracket-side connecting portion 55 includes a bracket-side connecting portion 57 connected to the rear surface of the side frame lower portion 17D, and a bracket-side connecting portion 57 extending obliquely forward to the left from the left edge (left and right outer edge) of the bracket-side connecting portion 57. It has a slope portion 58 . The rear end of the bracket-side flat plate portion 56 is connected to the front edge of the bracket-side slope portion 58 . In this embodiment, the bracket 50 further includes a plate-like bracket front end portion 59 that extends rightward from the front edge of the bracket-side flat plate portion 56 and reaches the front surface of the side frame lower portion 17D. The bracket 50 is fixed to the side frame lower portion 17D by welding the bracket side coupling portion 57 to the rear surface of the side frame lower portion and welding the bracket front end portion 59 to the front surface of the side frame lower portion 17D. As a result, the bracket-side flat plate portion 56 forms the plate-like portion 17S in the side frame 17, which is spaced outward (leftward) from the outer surface contour 17C (see FIG. 6) of the side frame lower portion 17D.

In this embodiment, as shown in FIG. 6, the bracket 50 is formed by bending a substantially square sheet metal member along one side. The bracket-side coupling portion 57, the bracket-side slope portion 58, the bracket-side flat plate portion 56, and the bracket front end portion 59 each form a substantially rectangular shape extending in the vertical direction. As shown in FIGS. 4 and 6, between the right edge of the bracket-side coupling portion 57 and the rear edge of the bracket-side flat plate portion 56, the bracket has an upper edge and a lower edge that are substantially rectangular in the direction of approaching each other. A bracket-side notch 60 is formed by notching. As a result, the vertical widths of the bracket-side slope portion 58 and the bracket-side coupling portion 57 are smaller than the vertical width of the bracket-side flat plate portion 56 .

As shown in FIG. 6, the bracket-side flat plate portion 56 is provided with two hooking holes 62 extending vertically through the bracket-side plate portion 56 in the thickness direction. The two hooking holes 62 are positioned in front of the corresponding bracket-side cutouts 60 . More specifically, the upper hooking hole 62A is positioned above the lower edge of the upper bracket side cutout 60A, and the lower hooking hole 62B is positioned below the upper edge of the lower bracket side cutout 60B. located in

As shown in FIG. 7, the wire member 51 is formed by bending a metal round bar. The wire member 51 is connected to a pair of wire hooking portions 65 hooked to the hooking holes 62 from the left outer side, respectively, and connected to each of the wire hooking portions 65 to extend forward along the left side surface of the bracket-side flat plate portion 56 . and a pair of wire extensions 66 extending into the . The front ends of the wire extension portions 66 are connected to each other and provided with webbing engaging portions 68 extending vertically. In this embodiment, the wire hooking portion 65 is formed by bending the end portion of the wire member 51 into a hook shape (J shape).

As shown in FIG. 8 , the retainer 52 is coupled to the bracket-side connecting portion 55 , more specifically, to the bracket-side flat plate portion 56 , and retainer-side connecting portions 70 extending outward from the bracket-side flat plate portion 56 and retainer-side connecting portions 70 . A retainer-side flat plate portion 71 extends forward from the left edge of the portion 70 and faces the bracket-side flat plate portion 56 via the wire member 51 . In this embodiment, the retainer-side connecting portion 70 has a plate-like shape that is inclined leftward toward the front so as to follow the left and right outer surfaces of the bracket-side slope portion 58 , and both are inserted through the left and right outer surfaces of the bracket-side slope portion 58 . Fastened with bolts. However, it is not limited to this aspect, and for example, the retainer-side connecting portion 70 may be joined to the rear surface of the side frame lower portion 17D by welding or the like. As shown in FIG. 3 , the retainer-side flat plate portion 71 is provided with a through hole 74 that penetrates in the thickness direction, and the male screw portion 28 of the airbag module 12 passes through the through hole 74 . The airbag module 12 is coupled to the retainer 52 by fastening the male threaded portion 28 to the retainer 52 . That is, the airbag module 12 is coupled to and supported by the side frame 17 by the airbag module support structure 23 . However, in FIG. 8, the airbag module 12 is indicated by a two-dot chain line.

As shown in FIG. 3, the bracket-side flat plate portion 56 and the retainer-side flat plate portion 71 are spaced apart in the left-right direction, and the wire extension portion 66 passes therebetween. By connecting the bracket 50 and the retainer 52, the wire extension portion 66 is sandwiched between the bracket-side flat plate portion 56 and the retainer-side flat plate portion 71, thereby preventing the wire member 51 from coming off. In this manner, the retainer 52 has the function of connecting the airbag module 12 to the side frame 17 and preventing the wire member 51 from coming off in cooperation with the bracket 50 .

As shown in FIG. 8, the retainer 52 is formed by bending a piece of substantially square sheet metal member like the bracket 50 . It has a substantially rectangular shape extending along the direction. In the retainer 52, a pair of upper and lower retainer side cutouts are cut out in a direction approaching each other from the upper edge and the lower edge of the retainer 52 between the rear edge of the retainer side connecting portion 70 and the rear edge of the retainer side flat plate portion 71, respectively. 80 is provided. As a result, the vertical width of the retainer-side connecting portion 70 is smaller than the vertical width of the retainer-side flat plate portion 71 . The vertical width of the retainer-side connecting portion 70 is substantially equal to the vertical width of the bracket-side slope portion 58 , and the vertical width of the retainer-side flat plate portion 71 is substantially equal to the vertical width of the bracket-side flat plate portion 56 . . The upper and lower edges of the retainer-side flat plate portion 71 are aligned with the upper and lower edges of the bracket-side flat plate portion 56, respectively, and the upper and lower edges of the retainer-side connecting portion 70 are aligned with the upper and lower edges of the bracket-side slope portion 58, respectively. aligned with the bottom edge. As shown in FIG. 4 , the retainer-side notch 80 and the bracket-side notch 60 overlap each other, and the retainer-side notch 80 is located behind the bracket-side notch 60 and behind the two hooking holes 62 . there is More specifically, the upper retainer-side notch 80A is located behind the upper engaging hole 62A, and the lower retainer-side notch 80B is located behind the lower engaging hole 62B.

As shown in FIG. 8, the retainer 52 is formed with a retainer-side sub-notch 82 in front of the hooking hole 62. The retainer-side sub-notch 82 is cut in a direction in which the upper edge and the lower edge of the retainer 52 approach each other. As shown in FIG. 6, the bracket 50 also has bracket-side auxiliary cutouts 84 that are cut out from the upper and lower edges of the bracket 50 in front of the hooking hole 62 in the direction of approaching each other and aligned with the retainer-side secondary cutouts 82 . is provided. Each of the wire extension portions 66 extends forward from the wire hooking portion 65 and extends vertically from the front end of the inner horizontal portion 86 to reach the retainer side secondary cutout portion 82 and the bracket side auxiliary cutout portion 84 . a vertical portion 87 extending in a direction away from the bracket-side flat plate portion 56 and the retainer-side flat plate portion 71 along a front edge of the retainer-side flat plate portion 71 and the bracket-side flat plate portion 56 extending forward from the extending end of the vertical portion 87; and an outer horizontal portion 88 that reaches forward. As a result, as shown in FIG. 8, the wire extension portion 66 protrudes forward (that is, in a direction away from the bracket-side coupling portion 57) from between the bracket-side flat plate portion 56 and the retainer-side flat plate portion 71, thereby extending the wire. The front end of the portion 66 is located forward of the front edge of the retainer-side flat plate portion 71 and the front edge of the bracket-side flat plate portion 56 . Accordingly, the webbing engaging portion 68 connecting the front ends of the wire extension portions 66 vertically is provided in front of the front edge of the bracket-side flat plate portion 56 and in front of the front edge of the retainer-side flat plate portion 71 . In addition, by setting the distance between the front ends of the two wire extension portions 66 to be larger in the vertical direction than the distance between the rear ends, the webbing engaging portion 68 becomes longer and can be used in a wider range in the vertical direction. The deployment direction of the airbag 25 can be guided.

As shown in FIG. 3, the wire extension portion 66 gently curves forward and left outward at the outer horizontal portion 88 . As a result, the front end of the wire extension portion 66 is positioned to the left of the wire hooking portion 65 . Further, in this embodiment, the front end of the wire extension portion 66 and the webbing engaging portion 68 are in contact with the right side surface of the airbag module 12, more specifically, the right outer surface of the bottom wall 30A of the case main body 30. As shown in FIG.

The webbing 42 is arranged so as to pass between the front surface portion 34 and the left side surface portion 35 from the stitched portion 40 , extend toward the inside of the vehicle seat 1 , and reach the webbing engaging portion 68 . A hook 92 is sewn to the inner end portion of the vehicle seat 1 of the webbing 42 , and the webbing 42 is coupled to the side frame 17 by hooking the hook 92 onto the webbing engaging portion 68 . That is, one end (front end) of the webbing 42 is sewn to the skin material 11, and the other end (rear end) is attached to the front end of the extension of the wire member 51, more specifically, to the webbing engaging portion 68 of the wire member 51. It has a locked other end. Thus, webbing 42 is coupled to side frame 17 by airbag module support structure 23 .

Next, a method for assembling the vehicle seat 1 configured as described above and its effect will be described. In the assembly of the vehicle seat 1, as shown in FIG. 6, the worker welds the bracket-side coupling portion 57 of the bracket 50 to the rear surface of the side frame lower portion 17D to the pre-assembled seat back frame portion 15. I do. Thereby, the bracket 50 is fixed to the side frame lower portion 17D. After that, the assembly worker places the pad member 10 covered with the skin material 11 on the front side of the seat back frame 9, and inserts the wire hooking portion 65 of the wire member 51 into the hooking hole 62 as shown in FIG. After that, a step of hooking the hook 92 of the webbing 42 to the webbing engaging portion 68 is performed. Next, as shown in FIG. 8 , the assembling operator joins the airbag module 12 to the retainer 52 , and then performs the step of fastening the retainer-side connection portion 70 to the bracket-side slope portion 58 . After that, the vehicle seat 1 is assembled by joining the upholstery material 11 and the back seat material 44 .

In the process of fastening the retainer 52 to the bracket 50 , since the wire member 51 is only hooked to the bracket 50 , the wire member 51 may drop off from the bracket 50 . In order to check whether or not the wire member 51 has fallen off, an assembly worker who assembles the vehicle seat 1 visually checks the wire hooking portion 65 and the hooking hole in the process of fastening the retainer to the bracket 50 (FIG. 8). It is preferable to be able to confirm the engagement with 62 .

The bracket 50 and the retainer 52 are provided with cutouts 60 and 80 located behind the hook hole 62, respectively. As a result, as shown in FIG. 5, the assembling operator can visually check the engagement between the wire hooking portion 65 and the hooking hole 62 through both the notches 60 and 80 from the rear of the seat back frame 9 . . Accordingly, it is possible to easily confirm whether the wire member 51 and the side frame 17 are properly coupled during assembly.

When an occupant seated in the vehicle seat 1 is subjected to a load of a predetermined value or more due to a vehicle collision or the like, the load is detected by the sensor 47 and the inflator 26 is driven. As a result, the airbag 25 is inflated forward of the seat back 5 and deployed to the left of the occupant. At this time, a rearward reaction force is applied from the airbag 25 to the bracket-side flat plate portion 56 , and a rearward load is applied to the front edge of the bracket-side connecting portion 55 .

In this embodiment, a bracket-side inclined surface portion 58 extending obliquely forward is provided at the front portion of the bracket-side connecting portion 55 . Therefore, when a rearward load is applied to the front edge of the bracket-side connecting portion 55, the bracket-side slope portion 58 resists the load. As a result, deformation of the bracket during deployment of the airbag can be more reliably prevented, and the airbag can be deployed more appropriately.

As shown in FIG. 3 , the bracket-side slope portion 58 extends obliquely forward from the left end of the bracket-side coupling portion 57 . Accordingly, unlike the case where the bracket-side slope portion 58 extends forward from the left end of the bracket-side coupling portion 57, the bracket 50 and the retainer 52 can be fastened from behind. This allows the retainer 52 to be easily fastened to the bracket 50 even when the pad member 10 is arranged on the front side of the seat back frame 9 . In addition, compared to the case where the bracket-side slope portion 58 is formed to extend leftward, the amount of protrusion of the bracket 50 and the retainer 52 from the side frame 17 to the left and right can be reduced. Thereby, the lateral width of the vehicle seat 1 can be reduced.

As shown in FIG. 8 , webbing engaging portions 68 are provided in front of the front edge of the retainer-side flat plate portion 71 and in front of the front edge of the bracket-side flat plate portion 56 . Therefore, the hook 92 can be hooked to the webbing engaging portion 68 without being obstructed by the retainer-side flat plate portion 71 and the bracket-side flat plate portion 56 .

The wire member 51 is hooked in the hooking hole 62 of the bracket 50 at the wire hooking portion 65, and is supported by the side frame 17 in a cantilevered state at the inner horizontal portion 86 between the bracket 50 and the retainer 52. . Therefore, the front end of the wire extension portion 66 and the webbing engaging portion 68 may swing due to vibrations applied to the vehicle seat 1 and may come into contact with the side frame lower portion 17D, generating abnormal noise. In the present embodiment, as shown in FIG. 3, the wire member 51 is curved outward to the left at the outer horizontal portion 88, that is, in a direction away from the side frame lower portion 17D. As a result, the front end of the wire extension portion 66 and the webbing engaging portion 68 are positioned outward to the left with respect to the wire hooking portion and the hooking hole, and the front end of the wire extending portion 66 and the webbing engaging portion 68 are positioned sideways. It is located away from the frame lower portion 17D. This makes it difficult for the wire extension portion 66 and webbing engaging portion 68 to come into contact with the side frame lower portion 17D. Therefore, it is possible to prevent the occurrence of abnormal noise due to contact between the wire extension portion 66 and webbing engaging portion 68 and the side frame lower portion 17D.

As shown in FIG. 3, by bringing the webbing engaging portion 68 into contact with the right side surface of the airbag module 12, a frictional force acts on the webbing engaging portion 68, causing the webbing engaging portion 68 to swing. can be suppressed. As a result, the webbing engaging portion 68 is less likely to come into contact with the side frame 17, and abnormal noise due to contact between the webbing engaging portion 68 and the side frame 17 can be prevented. Furthermore, in this embodiment, the outer surface of the case body 30 including the outer surface of the bottom wall 30A is coated with resin. That is, since the right side surface of the airbag module 12 with which the webbing engaging portion 68 abuts is coated with resin, the webbing engaging portion 68 is less likely to be deformed than when the right side surface of the airbag module 12 is made of metal. 68 is prevented from coming into contact with the right side surface of the airbag module 12 .

In the above embodiment, the bracket 50 is coupled to the side frame lower portion 17D at the bracket front end portion 59 in addition to the bracket side coupling portion 57 . As a result, the connection between the bracket 50 and the side frame 17 is strengthened, so that the deployment direction of the airbag 25 can be further stabilized.

Although the specific embodiments have been described above, the present invention is not limited to the above embodiments and can be widely modified. In the above embodiment, the vehicle seat 1 constitutes a front passenger's seat, but is not limited to this aspect. For example, as shown in FIGS. 9 and 10, the vehicle seat 101 may constitute rear seats in the second and subsequent rows.

In the above embodiment, the airbag module 12 is provided in the seat back 5, but it is not limited to this aspect. For example, as shown in FIG. 11 , the airbag module 12 may be provided on the seat cushion 4 and coupled to the side frames 202 of the cushion frame 201 forming the seat cushion 4 .

In the above embodiment, the side frame lower portion 17D and the bracket 50 are configured as separate members, but the side frame lower portion 17D and the bracket 50 may be configured as an integral member. For example, the bracket-side flat plate portion 56 and the bracket-side connection portion 55 may be configured by cutting and raising the sidewall of the side frame lower portion 17D. By configuring the side frame lower portion 17D and the bracket 50 as an integral member, the number of parts constituting the vehicle seat 1 can be reduced, and the configuration of the vehicle seat 1 can be simplified.

In the above embodiment, the airbag module 12 is coupled to the left side frame lower portion 17D, but the present invention is not limited to this aspect, and the airbag module 12 may be provided on at least one of the left and right side frames 17. good. For example, the airbag module 12 may be coupled to the right side frame lower portion 17D, or the airbag modules 12 may be coupled to the left and right side frame lower portions 17D, respectively.

Reference Signs List 1 : Vehicle seat 9 : Seat back frame 10 : Pad member 11 : Skin material 12 : Airbag module 17 : Side frame 42 : Webbing 50 : Bracket 51 : Wire member 52 : Retainer 55 : Bracket side connecting portion 56 : Bracket Side flat plate portion 57 : Bracket side coupling portion 58 : Bracket side slope portion 60 : Notch portion 62 : Hooking hole 65 : Wire hooking portion 66 : Wire extension portion 68 : Webbing hooking portion 70 : Retainer side connecting portion 71 : Retainer-side flat plate portion 80: Notch

Claims (9)

a seat frame including a pair of left and right side frames;
A bracket that is connected to one of the side frames and has a bracket-side connecting portion that extends outward in the left and right direction, and a plate-like bracket that extends forward from the left and right outer edges of the bracket-side connecting portion, and has a hook hole that penetrates left and right. a bracket having side plate portions;
a wire member having a hooking portion hooked to the hooking hole and an extension portion extending forward from the hooking portion along the left and right outer surfaces of the bracket-side flat plate portion;
a retainer-side connection portion that is coupled to the one of the side frames or the bracket-side connection portion and extends laterally outward from the bracket-side flat plate portion; a retainer having retainer-side flat plate portions facing each other via the wire member;
an airbag module coupled to the left and right outer surfaces of the retainer-side flat plate portion;
a pad member supported on the front side of the seat frame;
a skin material covering the front surface of the pad member;
a webbing having one end sewn to the skin material and the other end locked to the extension of the wire member;
A vehicle seat according to claim 1, wherein the retainer-side connection portion and the bracket-side connection portion are each provided with a notch portion penetrating in the front-rear direction behind the engaging hole. 2. The vehicle seat according to claim 1, wherein the bracket has a bracket front end portion coupled to the side frame from a front edge of the bracket-side flat plate portion. 3. The vehicle seat according to claim 1, wherein the bracket and the side frame are integrally formed. The bracket-side connection portion has a bracket-side joint portion joined to the rear surface of the side frame, and a bracket-side slope portion extending obliquely forward from left and right outer edges of the bracket-side joint portion,
The bracket-side flat plate portion is connected to the front edge of the bracket-side slope portion,
The vehicle seat according to any one of claims 1 to 3, wherein the retainer-side connection portion is fastened to left and right outer surfaces of the bracket-side slope portion. A webbing engaging portion for engaging the webbing is provided at the front end of the extension portion,
5. The vehicle seat according to claim 4, wherein the webbing engaging portion is positioned in front of the front edge of the retainer-side flat plate portion and in front of the front edge of the bracket-side flat plate portion. 6. The vehicle seat according to claim 5, wherein the webbing engaging portion is positioned laterally outward with respect to the engaging portion. 7. The vehicle seat according to claim 6, wherein the webbing engaging portion is in contact with left and right inner side surfaces of the airbag module. A bracket-side connecting portion that is joined to the left and right outer surfaces of a frame that forms the skeleton of the vehicle seat and extends outward in the left and right direction; a bracket having a bracket-side plate portion with a blind hole;
a wire member having a hooking portion hooked to the hooking hole and an extension portion extending forward from the hooking portion along the left and right outer surfaces of the bracket-side flat plate portion;
a retainer-side connecting portion coupled to the frame or the bracket-side connecting portion and extending outward from the bracket-side flat plate portion; a retainer having retainer-side flat plate portions facing each other through
An airbag module support structure, wherein the retainer-side connecting portion and the bracket-side connecting portion are provided with cutout portions penetrating in the front-rear direction at positions aligned with the hooking holes. a seat frame including a pair of left and right side frames;
A bracket-side connecting portion coupled to the side frame and extending outward to the left and right, and a bracket-side flat plate having a plate shape extending forward from the left and right outer edges of the bracket-side connecting portion and formed with a hooking hole penetrating left and right. a bracket having a portion;
a wire member having a hooking portion hooked to the hooking hole and an extension portion extending forward from the hooking portion along the left and right outer surfaces of the bracket-side flat plate portion;
a retainer-side connection portion coupled to the side frame or the bracket-side connection portion and extending outward from the bracket-side flat plate portion; a retainer having retainer-side flat plate portions facing each other through
A method for assembling a vehicle seat, wherein the retainer-side connection portion and the bracket-side connection portion are provided with cutout portions penetrating in the front-rear direction at positions aligned with the hook holes, respectively,
a step of hooking the hooking portion of the wire member to the hooking hole;
and coupling the retainer-side connecting portion to the side frame or the bracket-side connecting portion.

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