JP5263530B2 - Energy absorption structure on the side of the vehicle - Google Patents

Description

  The present invention relates to an energy absorbing structure for a vehicle seat.

2. Description of the Related Art Conventionally, as an energy absorbing structure for a vehicle side portion, a structure in which an airbag device is housed in a side support provided on an outer side in a seat width direction of a seat back of a vehicle seat is employed.
An example of such an energy absorption structure on the side of the vehicle is described in Patent Document 1 and Patent Document 2. In the vehicle side energy absorbing structure described in Patent Literature 1 and Patent Literature 2, the airbag device is accommodated in the side support, and the seat back is completely covered by the portion in which the airbag device is accommodated. A cover (board) is arranged on the entire side surface from the rear.

JP 2007-006961 A JP 2006-205765 A

  However, in the conventional energy absorption structure on the side portion of the vehicle, as described above, since the cover is disposed on the entire side surface from the rear of the seat to cover the airbag device housed in the side support, the airbag is deployed. When doing so, the airbag must be deployed while pushing the cover outward and spread out, causing a problem that it is difficult to deploy.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an energy absorption structure for a vehicle side portion in which the deployability of an airbag is improved.

In order to achieve the above-described object, an energy absorbing structure for a vehicle side portion according to the present invention includes a seat back side frame member provided so as to extend in the vertical direction outside the seat back in the width direction, and the seat back side frame member. The airbag device includes an airbag device that is attached to the outer side of the seat width direction and inflates and deploys at the time of a vehicle collision, and a backboard that covers at least a part of a side surface of the seatback. The apparatus is characterized in that the front end portion of the apparatus is provided in front of the vehicle with respect to the front end portion of the backboard.
In the present invention configured as described above, it is necessary to move the backboard to the outside of the vehicle when the airbag is deployed. However, at least a part of the side surface of the seatback is covered by the backboard. Since the front end portion is positioned in front of the vehicle with respect to the front end portion of the backboard, deployment of the airbag is not hindered by the backboard, and the deployability of the airbag is improved.

The present invention preferably further includes an airbag bracket fixed to the seat back side frame member on the inner side in the seat width direction of the back board, and the back board is attached to the side frame member via the airbag bracket. It is fixed.
In the present invention configured as described above, since the backboard is fixed to the side frame member via the airbag bracket, the backboard can be reliably fixed on the side surface of the seat back.

In the present invention, the airbag bracket is preferably an airbag deployment guide member that covers at least a part of the airbag apparatus on the outer side in the seat width direction from the rear.
In the present invention configured as described above, the airbag deployment guide member can guide the deployment of the airbag and effectively deploy the airbag forward of the vehicle. Further, by providing the airbag deployment guide member, it is possible to cope with an increase in size without providing an airbag case. Furthermore, as described above, since the backboard is fixed to the airbag bracket (airbag deployment guide member), the backboard does not interfere with deployment when the airbag is deployed.

The present invention is preferably a fragile portion that can be opened by receiving an airbag deployment pressure on a skin material that covers the seat back, and the fragile portion from which the airbag is deployed to the outside of the seat back. And a low expansion member for suppressing expansion of the skin material caused by the deployment pressure of the airbag, wherein the skin material includes a first skin material extending from the outside in the seat width direction to the fragile portion, and the front side of the seat back The second skin material extending from the center side in the sheet width direction to the fragile portion, the low extension member is provided on the inner side of the sheet from the first skin material, and one end thereof is fixed to the first skin material in the vicinity of the fragile portion The other end is fixed to the seat back side frame at a position behind the vehicle rather than the fixed position between the back board and the airbag bracket.
In the present invention configured as described above, since the low extension member can be attached before the backboard is attached to the seat back side frame member, the low extension member and the back board can be attached to the seat back side frame member. improves.

In the present invention, preferably, the low extension member is formed with a through hole penetrating the fixing member for fixing the backboard and the airbag bracket at a portion corresponding to the fixing position of the backboard and the airbag bracket.
In the present invention configured as described above, since the fixing member for fixing the backboard and the air bag bracket passes through the through hole formed in the low extension member, the low extension member is attached. The degree of freedom in setting the vertical length of the member increases.

The present invention is preferably a fragile portion that can be opened by receiving an airbag deployment pressure on a skin material that covers the seat back, and the fragile portion from which the airbag is deployed to the outside of the seat back. And a low expansion member for suppressing expansion of the skin material caused by the deployment pressure of the airbag, the skin material extending from the outer side in the seat width direction to the fragile portion, and the seat back It consists of a second skin material that extends from the front side in the sheet width direction to the fragile portion, and the low extension member is provided on the inner side of the sheet from the first skin material, and one end of the low skin extension member is provided near the fragile portion in the first skin material The other end is fixed to the airbag bracket or the first skin material at a position in front of the vehicle rather than the fixed position between the backboard and the airbag bracket.
In the present invention configured as described above, since the low-stretch member can be fixed to the airbag bracket or the first skin material before the backboard is attached to the airbag bracket, the low-stretch member is securely attached. be able to.

The present invention preferably further includes a lumbar support device provided on the back surface of the seat back and provided with a lumbar support for supporting the back of the seated occupant from the rear side of the vehicle, the lumbar support device having a seat width of the seat back. A lumbar operation part for adjusting the position and form of the lumbar support is provided on the outer side in the direction. The lumbar support and the lumbar operation part are connected by a lumbar shaft, and this lumbar shaft is inserted into a hole formed in the backboard. The operation portion is engaged with the lumbar shaft via the engagement member so as to prevent the operation portion from being separated from the lumbar shaft and scattered when the airbag is deployed.
In the present invention configured as described above, even if the lumbar operation part is detached from the lumbar shaft when the airbag is deployed, the lumbar operation part is scattered because the lumbar operation part is attached to the lumbar shaft by the engaging member. There will be no improvement in passenger protection performance.

  According to the energy absorption structure of the vehicle side portion of the present invention, the deployability of the airbag provided on the side portion of the vehicle seat can be improved.

It is a perspective view of the vehicle seat provided with the energy absorption structure of the vehicle side part by embodiment of this invention. It is a partial see-through side view of the vehicle seat provided with the energy absorption structure of the vehicle side part by embodiment of this invention. It is the fragmentary sectional view cut | disconnected along the III-III line of FIG. FIG. 4 is a partial cross-sectional view similar to FIG. 3 of a vehicle seat having a vehicle side energy absorbing structure according to another embodiment of the present invention. It is a fragmentary sectional view similar to FIG. 3 of the vehicle seat which has the energy absorption structure of the vehicle side part by further another embodiment of this invention. It is the fragmentary sectional view cut | disconnected along the VI-VI line of FIG. It is a perspective view which shows the drive mechanism of a lumbar support. It is a disassembled perspective view which shows the combined state of a lumbar shaft and a lumbar lever. It is a top view which shows the attachment state of a lumbar shaft and a lumbar lever.

Hereinafter, a vehicle side energy absorption structure according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, a vehicle seat provided with an energy absorption structure for a vehicle side part according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view of a vehicle seat having a vehicle side energy absorbing structure according to a first embodiment of the present invention. FIG. 2 is a vehicle side energy absorbing structure according to a first embodiment of the present invention. FIG. 3 is a partial perspective side view of the vehicle seat, and FIG. 3 is a partial cross-sectional view showing the internal structure of the side support portion taken along line III-III in FIG.

  As shown in FIG. 1, reference numeral 1 denotes a vehicle seat (driver's seat) disposed on the left side of the front row in the vehicle interior. The vehicle seat 1 includes a seat cushion 3 and a rear seat cushion 3. The seat back 2 is rotatably attached to the end, and the headrest 9 is attached to the upper end of the seat back 2. Side support portions 4 are provided on both side portions of the seat back 2, and a lumbar lever 6 of a lumbar support device, which will be described later, is provided below the side support portions 4 on the outer side in the vehicle width direction among these side support portions 4.

  As shown in FIG. 2, the seat back 2 of the vehicle seat 1 is provided with a back board 8, a seat back side frame 10, and a side airbag device 12. The backboard 8 is provided in the seatback 2 so as to cover the entire back surface and part of the side surface of the seat, and the side airbag device 12 is provided in a space between the backboard 8 and the seatback side frame 10. ing.

  As shown in FIG. 3, the side airbag device 12 includes an airbag 15 and an inflator 16 that is provided behind the airbag 15 and causes an explosion to deploy the airbag 15. The airbag device 12 is entirely covered with a cloth cover 11. The cloth cover 11 is adhered by a tape (not shown) so that the tape is peeled off when the airbag is deployed. Further, the front end portion 15 a of the airbag 15 of the airbag device 12 is located in front of the vehicle with respect to the front end portion 8 a of the backboard 8.

  An airbag bracket 14 is provided on the rear surface of the side airbag device 12, and the airbag bracket 14 has a U-shaped cross section in a plan view, and covers a part of the rear and side surfaces of the side airbag device 12. Thus, both sides thereof extend forward. The airbag 15 and the inflator 16 of the airbag device 12 are attached to the seat back side frame 10 via the airbag bracket 14 by bolts and nuts 17a.

  A cushion material 18 is disposed from the front end portion 4a of the side support portion 4 through the central front portion 4b to the center portion of the seat. The surface of the side support portion 4 is covered with the skin materials 20 and 22. The cushion material 18, the side airbag device 12, and the side frame 10 are accommodated in a space surrounded by the backboard 8 and the skin materials 20 and 22. The skin materials 20 and 22 include a first skin material 20 and a second skin material 22, and the first skin material 20 passes from the inside of the front end portion 8 a of the backboard 8 to the front portion 4 a through the side surface of the side support portion 4. The second skin material 22 extends from the portion of the front portion 4a of the side support portion 4 adjacent to the end portion of the first skin material 20 through the central portion 4b toward the seat central portion.

  On the inner side of the first skin material 20 and the second skin material 22, the first force cloth 24 and the second force which are low stretch members for suppressing the stretch of the skin materials 20 and 22 when the airbag 15 is deployed. Each cloth 26 is provided. The first webbing 24 passes through the space between the side airbag device 12 and the first skin material 20 from the front tip portion of the first skin material 20, that is, the front portion 4a of the side support portion 4, and then the backboard 8. Is extended toward the rear portion 4c of the side support portion 4 through a space between the backboard 8 and the bracket 14. The second force cloth 26 passes through the space between the cushion material 18 and the first force cloth 24 from the front tip portion of the second skin material 22, that is, the front portion 4a of the side support portion 4c, and then the cushion material 18 and the side air. It passes through the space between the bag device 12 and further through the space between the cushioning material 18 and the seat back side frame 10 and extends toward the rear portion 4c of the side support portion 4, and the side frame 10 by bolts and nuts 17b. It is fixed to. The rear ends of the first force cloth 24 and the second force cloth 26 overlap each other, and are fixed to the seat back side frame 10 by bolts and nuts 17b at the rear part of the space in the side support part 4. The front ends of the first skin material 20 and the first webbing 24 and the second skin material 22 and the second webbing 26 are sewn in the vicinity of the front portion 4 a of the side support 4.

  Between the 1st skin material 20 and the 2nd skin material 22, the weak part 28 which made the intensity | strength of a seam weaker than another site | part is provided. When the airbag is deployed, the fragile portion 28 is broken from the inside by the deployment pressure of the airbag to form an opening through which the airbag passes.

  The front end portion 8a of the backboard 8 is provided with a clip 30 that protrudes inward of the backboard 8 on the inner side surface of the backboard 8, and the clip 30 includes the first skin material 20 and the first force. It penetrates the cloth 24 and the bracket 14 and extends to the inner surface of the side portion in the vicinity of the front end portion of the side portion on the outer side among the side portions of the bracket 14. The first skin material 20 and the first blanket 24 are fixed to the bracket 14 by the clip 30.

  In this 1st Embodiment, the side airbag apparatus 12 is attached in the side support part 4 as follows. That is, the airbag bracket 14 provided with a through hole in advance at the front end portion on the side located on the outer side of the seat, and the airbag device 12 disposed inside the airbag bracket 14 are connected via bolts and nuts 17a. Attach to the side frame 10. Next, the second skin material 22 and the second webbing 26 that have been stitched together in advance at the front end portion, and the end of the second webbing 26 that is not sewn together are connected to the rear portion of the side frame 10 via bolts and nuts 17b. The cushioning material 18 is disposed in the space between the second skin material 22 and the second webbing 26. Next, the end portions of the first force cloth 24 and the first skin material 20 are sewn in advance, and the unsewn end portions of the first force cloth 24 are connected to the second force cloth 26 via the bolts and nuts 17b. Attach to the side frame 10 at the same location where is attached. Next, after the first skin material 20 is folded back at the stitching portion and overlapped on the outer surface of the first webbing 24, the first skin material 20 is positioned at the position where the clip 30 passes, that is, the position aligned with the hole of the airbag bracket 14. 1 A skin material 20 and a hole penetrating the first webbing 24 are provided. Through this hole and the hole of the airbag bracket 14, the clip 30 attached in advance to the inside of the front end portion of the backboard 8 is penetrated to fix the backboard 8 to the airbag bracket 14. Thus, since the through-hole for letting the clip 30 pass to the 1st skin material 20 and the 1st force cloth 24 is provided, the freedom degree of the setting of the vertical direction length of the 1st skin material 20 and the 1st force cloth 24 is given. Can be increased.

Next, the operation (action) of the vehicle seat provided with the energy absorption structure for the vehicle side portion according to the first embodiment of the present invention described above will be described.
When the vehicle has a side collision due to an impact from the side, the inflator 16 explodes and the airbag 15 of the airbag device 12 is deployed. At this time, the airbag 15 advances forward from the airbag cover 11 from which the tape has been peeled between the first force cloth 24 and the second force cloth 26, and the second force cloth 26, the cushion material 18, While the first skin material 20 and the first webbing 24 are spread to the left and right, the fragile portion 28 is reached, the fragile portion 28 is broken from the inside by the deployment pressure of the airbag 15, and the outside of the seat is cut off from the broken opening To be deployed.

  Since the front end portion 15a of the airbag 15 of the airbag device 12 is disposed in front of the front end portion 8a of the backboard 8, the backboard 8 does not hinder the deployment of the airbag 15 when the airbag 15 is deployed. . Further, since the airbag bracket 14 having a U-shaped cross section extends toward the front so as to cover a part of the rear and both side surfaces of the side airbag device 12, it is not necessary to provide an airbag case. The airbag bracket 14 guides the airbag 15 when the airbag 15 is deployed, the deployment direction of the airbag is directed forward, and the airbag 15 can be effectively deployed.

  Next, a vehicle seat having a vehicle side energy absorbing structure according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a partial cross-sectional view similar to FIG. 3 of a vehicle seat having a vehicle side energy absorbing structure according to a second embodiment of the present invention. Here, only the configuration different from the first embodiment shown in FIG. 3 will be described. That is, in the second embodiment, the side airbag device 12 has an airbag case 13, and an airbag 15 and an inflator 16 provided behind the airbag 15 are accommodated in the airbag case 13. Has been. The front end portion 13a in the center of the airbag case 13 is provided with an opening serving as an outlet when the airbag 15 is deployed. The front end portion 13 a of the airbag case 13 of the airbag device 12 is located in front of the vehicle with respect to the front end portion 8 a of the backboard 8. Furthermore, in the vehicle seat of the present embodiment, in addition to the cushioning material 18a disposed from the front portion 4a of the side support portion 4 to the center portion of the seat through the central front portion 4b, the front of the side airbag device 12 is Also in the space between the first force cloth 24 and the second force cloth 26, a cushion material 18 b is provided so as to extend laterally and rearward from the front portion 4 a of the side support 4.

Next, the operation (action) of the vehicle seat provided with the energy absorbing structure for the vehicle side portion according to the second embodiment of the present invention described above will be described.
When the vehicle has a side collision due to an impact from the side, the inflator 16 explodes and the airbag 15 of the airbag device 12 is deployed. At this time, the airbag 15 advances forward from the opening portion 13a of the airbag case 13 through the space between the first force cloth 24 and the second force cloth 26, and the second force cloth 26 and the cushion materials 18a and 18b. And the first skin material 20 and the first webbing 24 are spread to the left and right, reaching the fragile portion 28, the fragile portion 28 is broken from the inside by the deployment pressure of the airbag 15, and the sheet is opened from the broken opening The outside is expanded.
As described above, since the cushion material 18b is also provided between the first force cloth 24 and the second force cloth 26, the space between the cushion materials 18a and 18b when the airbag 15 is deployed. Since the air travels through the fragile portion 28, the airbag deployment direction can be reliably directed forward.

  Next, a vehicle seat having a vehicle side energy absorbing structure according to a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a partial cross-sectional view corresponding to the first embodiment shown in FIG. 3 of the vehicle seat having the vehicle side energy absorbing structure according to the third embodiment of the present invention. Here, only the configuration different from the first embodiment shown in FIG. 3 will be described. That is, in the third embodiment, the first blanket 24 is sewn to the first skin material 20 at a position ahead of the clip 30 without extending to the rear of the space in the side support portion 4. In addition to sewing the first force cloth 24 on the first skin material 20, the first force cloth 24 may be fixed to the airbag bracket 14.

  In the third embodiment, the side airbag device 12 is attached in the side support portion 4 as follows. That is, the airbag bracket 14 provided with a through hole in advance at the front end portion on the side located on the outer side of the seat, and the airbag device 12 disposed inside the airbag bracket 14 are connected via bolts and nuts 17a. Attach to the side frame 10. Next, the second skin material 22 and the second webbing 26 that have been stitched together in advance at the front end, and the end of the second webbing 26 that is not sewn together are connected to the rear part of the side frame 10 via bolts and nuts 17b. The cushioning material 18 is disposed between the second skin material 22 and the second webbing 26. Subsequently, the front ends of the first force cloth 24 and the first skin material 20 are sewn in advance. The length of the first skin material 20 is longer than the length from the stitched portion to the end portion of the first force cloth 24, so that the length from the stitched portion to the end portion of the first skin material 20 is necessary for attaching the clip 30. It is designed to be longer by a certain length. Next, the unsewn end portion of the first force cloth 24 is fixed on the outer surface of the front end portion of the outer side portion of the airbag bracket 14. Alternatively, the first skin material 20 is folded back at the stitching portion, overlapped on the first force cloth 24, and the end portion of the first force cloth 24 that is not sewn is sewn to the first skin material 20 and fixed. To do. Next, after the first skin material 20 is overlaid on the outer surface of the airbag bracket 14 so as to be positioned on the outer surface of the side portion of the airbag bracket 14 that is located outside the seat, the clip 30 is A hole that penetrates the first skin material 20 is provided at a position that passes through, that is, a position that matches the hole of the airbag bracket 14. Through this hole and the hole of the airbag bracket 14, the clip 30 attached in advance to the inside of the front end portion of the backboard 8 is penetrated to fix the backboard 8 to the airbag bracket 14. Thus, since the 1st force cloth 24 is being fixed to the airbag bracket 14 or the 1st skin material 20 in the vehicle forward position rather than the clip 30, before attaching the backboard 8 to the airbag bracket 14, it is 1st. Since the webbing 24 can be fixed to the airbag bracket 14 or the first skin material 20, the first webbing 24 can be securely attached.

Next, a vehicle seat having an energy absorption structure for a vehicle side part according to a fourth embodiment of the present invention will be described with reference to FIGS. 6 is a partial cross-sectional view showing the lumbar support device cut along the line VI-VI in FIG. 2, FIG. 7 is a perspective view showing a drive mechanism of the lumbar support, and FIG. 8 is a lumbar shaft. FIG. 9 is an exploded perspective view showing a connection state between the lumbar lever and the lumbar lever, and FIG. 9 is a plan view showing an attachment state between the lumbar shaft and the lumbar lever.
As shown in FIG. 6, the seat back 2 is provided with a lumbar support device 31 for supporting the occupant's waist or back from the vehicle rear side. The lumbar support device 31 includes a plate-shaped lumbar support 32, a torsion bar 34 that supports the lumbar support 32, and a lumbar that is an operation unit for changing the position and form of the lumbar support 32. A lever 6 and a lumbar shaft 36 for connecting the lumbar lever 6 and the lumbar support 32 via a torsion bar 34 are provided.

  The seat back side frame 10 is disposed between the lumbar lever 6 and the lumbar support 32 and the torsion bar 34, and the lumbar lever 6 extends through the back board 8 from the seat outward in the seat width direction. The lumbar shaft 36 extends through the side frame 10 and is rotatably supported.

  FIG. 7 is a perspective view showing a drive mechanism 37 for the lumbar support. As shown in FIG. 7, the inner end portion in the seat width direction of the lumbar shaft 36 is engaged with the moving member 44 having the coiled spring 40 and the tooth portion 46 and is rotated about the pivot shaft 50 while meshing with the tooth portion 46. The torsion bar 34 is connected to the outer end in the sheet width direction via a possible sector gear 48. The inner end of the coil spring 40 is in contact with the base plate 38, and the base plate 38 includes a flange portion 42 for fixing to the side frame 10.

  FIG. 8 is a perspective view showing the drive mechanism 37 of the lumbar support, and FIG. 9 is a plan view showing an attachment state of the lumbar shaft and the lumbar lever. As shown in FIG. 8, the lumbar lever 6 includes a lever-shaped knob portion 52 for a passenger to hold, and a shaft holding portion 54 that holds one end of the lumbar shaft 36. The knob portion 52 may have a cylindrical shape capable of dial-type operation instead of the lever shape.

  The shaft holding portion 54 is provided with a shaft hole 62 in which a spline groove is formed. By fitting the tip portion 58 of the lumbar shaft 36 in which the key groove is provided in the shaft hole 62, the lumbar shaft 36. And the shaft holding portion 54 of the lumbar lever 6 are non-rotatably coupled by spline coupling.

  A slit 56 for fitting a C-ring-shaped retaining ring 68 for fixing the lumbar shaft 36 and the lumbar lever 6 is provided on the vehicle rear side portion of the outer peripheral portion of the shaft holding portion 54. A retaining ring 68 is fitted into the slit 56 from the rear to the front of the vehicle.

  The lumbar lever 6 is made of plastic, and a PP hinge 64 that performs a hinge action using the elasticity of plastic is integrally provided at an upper end portion 60 inside the knob portion 52 of the lumbar lever 6. A locking ring portion 66 having an inner diameter through which the lumbar shaft 36 can be inserted is integrally provided at the tip of the hinge 64. Instead of the integral hinge 64, a hinge separate from the knob portion 52 may be provided between the upper end portion 60 and the locking ring portion 66.

  The hinge portion is bent using the elasticity of the PP hinge 64, the locking ring portion 66 and the shaft holding portion 54 are set coaxially, and through the locking ring portion 66, the shaft hole 62 is inserted into the tip portion 58 of the lumbar shaft 36. Mating. Thereafter, the lumbar shaft 36 and the lumbar lever 6 are fixed by fitting the retaining ring 68 into the slit 56 from the rear of the vehicle to the front as shown in FIG.

The hinge 64 is disposed so as to be located on the opposite side to the lever tip portion of the knob portion 52. Further, the locking ring portion 66 is positioned inward from the outer end portion of the side airbag device 12 in the seat width direction.
According to such a configuration, even when the lumbar lever 6 receives the airbag deployment force when the airbag of the side airbag device 12 is inflated and deployed, the locking ring portion 66 of the hinge 64 is attached to the lumbar shaft 36. Since it remains connected, the lumbar lever 6 can be secured to the lumbar shaft 36, and the lumbar lever 6 can be prevented from popping out. Further, when the lumbar lever 6 receives the airbag deployment force when the airbag of the side airbag device 12 is inflated and deployed, the shaft holding portion 54 is damaged or the lumbar lever 6 comes out of the lumbar shaft 36. The lumbar lever 6 is configured to be released toward the outer side in the sheet width direction.

  A retaining ring 68 for fixing the lumbar shaft 36 and the lumbar lever 6 is fitted into a slit 56 provided on the outer periphery of the shaft holding portion 54 of the lumbar lever 6 from the rear of the vehicle toward the front. As a result, when the airbag of the side airbag device 12 is inflated and deployed, the lumbar lever 6 receives the deployment force of the airbag and the shaft holding portion 54 is damaged or the lumbar lever 6 comes out of the lumbar shaft 36. Since the retaining ring 68 fitted in the slit moves from the rear of the vehicle to the rear side of the vehicle, the retaining ring 68 does not jump out to the front side and directly hit the occupant, thereby improving safety.

The hinge 64 that connects the locking ring portion 66 and the upper end portion 60 of the knob portion 52 is not the lever tip portion of the knob portion 52 that is easily subjected to the deployment force when the airbag of the side airbag device 12 is inflated and deployed. Since it is located on the opposite side, it is possible to prevent the airbag 64 from being directly applied to the hinge 64 and to prevent the lumbar lever 6 from being scattered.
Further, since the locking ring portion 66 is positioned inward from the outer end portion of the side airbag device 12 in the seat width direction, the deployment force is increased when the airbag of the side airbag device 12 is inflated and deployed. It is possible to prevent the lumbar lever 6 from scattering by being added to the coupling portion.

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat back 3 Seat cushion 4 Side support part 6 Lumber lever 8 Back board 10 Seat back side frame 11 Cover 12 Side airbag apparatus 13 Air bag case 13a Front end part (opening part) of an airbag case
14 Bracket 15 Airbag 15a Airbag front end 16 Inflator 17a, 17b Bolt / Nut 18, 18a, 18b Cushion material 20 First skin material 22 Second skin material 24 First force cloth 26 Second force cloth 28 Vulnerable portion 30 Clip 31 Lumber support device 32 Lumber support 34 Torsion bar 36 Lumber shaft 37 Lumber support drive mechanism 38 Base plate 40 Coiled spring 42 Flange portion 44 Moving member 46 Tooth portion 48 Sector gear 50 Pivot shaft 52 Knob portion 54 Shaft holding portion 56 Slit 58 Front end portion 60 Upper end portion 62 Shaft hole 64 PP hinge 66 Locking ring portion 68 Retaining ring

Claims (6)

A seat back side frame member provided so as to extend in the vertical direction outside the width direction of the seat back;
An airbag device including an airbag that is attached to the outside of the seat back side frame member in the seat width direction and inflates and deploys at the time of a vehicle collision;
A backboard covering at least a part of the side surface of the seat back;
An airbag bracket fixed to the seat back side frame member on the inner side in the seat width direction of the back board;
In the seat side view, the front end portion of the airbag device is provided in front of the vehicle with respect to the front end portion of the backboard ,
The backboard is fixed to the side frame member via the airbag bracket,
An energy absorbing structure for a vehicle seat. The airbag bracket energy absorbing structure of a vehicle seat according to claim 1 is an air bag deployment guide member covering at least a portion of the seat width direction outer side from the rear of the air bag device. Further, a fragile portion that can be opened by receiving an airbag deployment pressure on a skin material that covers the seat back, the fragile portion that the airbag is deployed to the outside of the seat back from the opening, and the airbag A low expansion member for suppressing expansion of the skin material caused by the development pressure,
The skin material consists of a first skin material extending from the seat width direction outer side to the fragile portion, and a second skin material extending from the front side of the seat back in the seat width direction to the fragile portion,
The low extension member is provided on the inner side of the seat from the first skin material, one end thereof is fixed to the first skin material in the vicinity of the fragile portion, and the other end is the backboard and the airbag bracket. The energy absorbing structure for a vehicle seat according to claim 1 or 2 , wherein the energy absorbing structure is fixed to the seat back side frame at a vehicle rear position rather than the fixed position. The low elongation member, the backboard and the airbag bracket and the fixing member according to claim through hole penetrates is formed a fixed and the backboard in a portion corresponding to a position for fixing the said air bag bracket 3 An energy absorbing structure for a vehicle seat as described in 1. Further, a fragile portion that can be opened by receiving an airbag deployment pressure on a skin material that covers the seat back, the fragile portion that the airbag is deployed to the outside of the seat back from the opening, and the airbag A low expansion member for suppressing expansion of the skin material caused by the development pressure,
The skin material consists of a first skin material extending from the seat width direction outer side to the fragile portion, and a second skin material extending from the front side of the seat back in the seat width direction to the fragile portion,
The low extension member is provided on the inner side of the seat from the first skin material, one end thereof is fixed to the first skin material in the vicinity of the fragile portion, and the other end is the backboard and the airbag bracket. The vehicle seat energy absorption structure according to claim 1 , wherein the vehicle seat is fixed to the airbag bracket or the first skin material at a position ahead of the vehicle. Furthermore, it has a lumbar support device that is provided on the back surface of the seat back and includes a lumbar support that supports the back of the seated occupant from the vehicle rear side,
This lumbar support device includes a lumbar operation unit for adjusting the position and form of the lumbar support on the seat width direction outer side of the seat back,
The lumbar support and the lumbar operation part are connected by a lumbar shaft, and this lumbar shaft is inserted into a hole formed in the backboard,
The vehicle according to any one of claims 1 to 5 , wherein the lumbar operation portion is attached to the lumbar shaft via an engagement member so as to prevent the lumbar operation portion from being separated from the lumbar shaft and scattered when the airbag is deployed. Sheet energy absorption structure.

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