JP6450796B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat mounted on a vehicle or the like.

  A vehicle seat in which a side airbag unit is built in a seat back is known (for example, Patent Document 1). A vehicle seat according to Patent Literature 1 includes a seat back frame including a pair of left and right side members extending vertically, a side airbag unit fastened to an outer surface of the side member, and a seat covering the side member and the side airbag unit. A back pad and a skin covering the seat back pad are provided, and the seat back pad and the skin are formed with an opening through which a side airbag developed from the side airbag unit passes. The opening of the epidermis is sewn so as not to open during normal use, and when the side airbag is deployed, the suture thread breaks and the side airbag passes through the opening.

JP, 2006-78463, A

  In the seat according to Patent Document 1, since the slit is formed in the seat back pad, the shape retaining force of the seat back pad is reduced. Therefore, when the occupant comes into contact with the seat back when getting on and off the vehicle, the seat back pad is displaced from the seat back frame inside the skin material, and in some cases, the seat back pad is caught by the seat back frame and maintained in a displaced state. Problem arises. When the seat back pad is maintained in a state shifted from the seat back frame, the seat back is maintained in a deformed state.

  In view of the above background, an object of the present invention is to suppress displacement of a seat back pad with respect to a seat back frame in a vehicle seat including a slit through which a side airbag passes.

  In order to solve the above problems, one aspect of the present invention is a vehicle seat (1) including a seat cushion (2) and a seat back (3), and a pair of left and right side members (24) extending vertically. Including a seat back frame (20), a side airbag unit (30) attached to the side member, and a flexible seat supported by the seat back frame and covering the side member and the side airbag unit The back pad (21), wherein the seat back pad penetrates a portion facing the side airbag unit in the thickness direction and extends substantially parallel to the side member, and is deployed from the side airbag unit. Has a pad-side slit (44) that can pass through, covers the surface of the seat back pad, A skin material (22) having a skin side slit (51) in a portion corresponding to the pad side slit, a pad coupling portion (61) coupled to a portion corresponding to the side member on the back surface of the seat back pad, It has a frame coupling part (62) clamped between the side member and the side airbag unit, and has a holding seat which fixes the position of the seat back pad with respect to the side member. .

  According to this configuration, since the holding sheet fixes the back surface of the seat back pad to the side member, positional deviation of the seat back pad with respect to the side member is suppressed. Thus, even if the seat back pad is temporarily deformed by the application of external force to the seat back and the pad side slit is opened, the seat back pad is restored and the pad side slit is returned to the closed state when the external force is lost. Further, the holding sheet is securely coupled to the side member and the side airbag unit.

  In the above invention, the holding sheet may have a sheet hole (64) through which a fastening shaft (35) for fastening the side airbag unit to the side member passes.

  According to this configuration, the holding sheet is securely coupled to the side member.

In the above invention, a backing material (45) is bonded to the back surface of the seat back pad,
The holding sheet may be sewn to the backing material.

  According to this configuration, the holding sheet is securely coupled to the seat back pad.

  In the above invention, the side airbag unit is provided on an outer surface facing the left and right outwards of the side member, and the pad-side slit is located on the left and right outer sides of the left and right side members in the seat back pad. It is good to be arranged in.

  According to this configuration, the side airbag can be deployed outside from the side portion of the seat.

  In the above invention, the pad-side slit may be opened on the left and right outer surfaces of the seat back pad.

  According to this configuration, the left and right outer portions of the seat back pad are unlikely to undergo deformation due to the load of the seated occupant, so that the pad side slit is prevented from opening unintentionally.

  In the invention described above, the pad-side slit may be disposed in front of the left and right side members in the seat back pad.

  According to this configuration, since the pad-side slit is formed in the seat back pad that is relatively easily separated from the side member, the slit is easily opened when the side airbag is deployed, and the side airbag is smooth. Can be deployed.

  In the above invention, the holding seat may be coupled to the seat back pad in front of the front edge of the side member.

  According to this configuration, the holding sheet can fix the position of the front portion of the seat back pad with respect to the side frame.

  In the above invention, it is preferable that the holding sheet is formed such that a portion coupled to the seat back pad has a larger vertical width than a portion coupled to the side member.

  According to this configuration, the holding sheet can be combined with the seat back pad in a wide range in the vertical direction, and the seat back pad can be supported over a wide range.

  In the above invention, the holding sheet may include a grip portion (63) extending rearward from between the side member and the side airbag unit.

  According to this configuration, when the holding sheet is coupled to the side member, the operator can hold the extension portion to determine the position of the holding sheet, and the seat back can be easily assembled.

  According to the above configuration, in the vehicle seat provided with the slit through which the side airbag passes, the positional deviation of the seat back pad with respect to the seat back frame can be suppressed.

The perspective view which looked at the vehicle seat which concerns on embodiment from the left front The perspective view which looked at the frame of the vehicle seat from the front right Cross-sectional view of the seat back (III-III cross-sectional view of FIG. 1) Side view showing the holding sheet Cross-sectional view of the seat back when the side airbag is deployed Cross-sectional view of a seat back according to a modified embodiment

  Hereinafter, an embodiment in which a vehicle seat according to the present invention is applied to a driver's seat of an automobile will be described with reference to the drawings. In the following description, the front, rear, left and right are determined based on the occupant seated on the seat.

  As shown in FIGS. 1 and 2, the seat 1 includes a seat cushion 2, a seat back 3 that is rotatably coupled to the rear end of the seat cushion 2, and a headrest 4 that is coupled to the upper end of the seat back 3. A pair of left and right slide rails 5 provided at the lower portion of the seat cushion 2 and a foot 6 that couples the slide rail 5 to the floor of the vehicle. The rear side portion of the seat cushion 2 is covered with a cover 7.

  The seat cushion 2 includes a seat cushion frame 11 serving as a skeleton, a seat cushion pad 12 supported by the seat cushion frame 11, and a skin material 13 that covers the surface of the seat cushion pad 12. The seat cushion frame 11 includes a pair of left and right cushion side members 15 extending in the front-rear direction, a front member 16 extending in the left-right direction and coupled to the front ends of the left and right cushion side members 15, and a left-right cushion side member 15 extending in the left-right direction. And a rear member 17 coupled to each rear portion.

  The slide rail 5 includes an upper rail 5A coupled to the cushion side member 15, and a lower rail 5B that supports the upper rail 5A so as to be slidable back and forth. Lower rail 5 </ b> B is coupled to the floor via foot 6. Between the lower rail 5B and the upper rail 5A, a rail lock device 5C for selectively fixing the relative positions of the two is provided.

  The seat back 3 includes a seat back frame 20 serving as a skeleton, a seat back pad 21 supported by the seat back frame 20, and a skin material 22 that covers the surface of the seat back pad 21. The seat back frame 20 includes a pair of left and right back side members 24 extending vertically, an upper member 25 extending left and right and coupled to upper ends of the left and right back side members 24, and left and right back side members 24 extending left and right. And a lower member 26 coupled to the lower part of each. The lower ends of the left and right back side members 24 are rotatably coupled to the rear ends of the corresponding left and right cushion side members 15 via a reclining mechanism 28. The reclining mechanism 28 fixes the angle of the back side member 24 with respect to the cushion side member 15 at an arbitrary position.

  The backside member 24 is a sheet metal member, and extends in the vertical direction and has a side wall portion 24A whose surface faces left and right, and a front edge wall that protrudes from the front edge of the side wall portion 24A to the left and right inward (center side of the seat 1 on the left and right). Part 24B and a rear edge wall part 24C protruding inward from the rear edge of the side wall part 24A. The cross-section of the back side member 24 has a groove shape that opens toward the left and right inner sides (the center side of the seat 1 on the left and right).

  As shown in FIG. 2, a side airbag unit 30 is provided on the outer surface (surface facing left and right outwards) of the side wall 24 </ b> A of the right back side member 24. As shown in FIG. 3, the side airbag unit 30 includes a side airbag 31 that is a bag body, an inflator 32 connected to the side airbag 31, and a retainer 33 that supports the inflator 32 and the side airbag 31. Have. The inflator 32 is a device that generates gas to be supplied to the side airbag 31 and includes a cylindrical housing 32A. The retainer 33 is formed in a plate shape and is coupled to the side surface of the housing 32A. The side airbag 31 is folded in the initial state and is disposed on the side of the inflator 32 and the retainer 33. The outer shape of the side airbag unit 30 including the inflator 32, the side airbag 31, and the retainer 33 is substantially a rectangular parallelepiped, and the retainer 33 forms one outer surface thereof.

  A shaft-like fastening shaft 35 is provided on a surface of the retainer 33 different from the inflator 32 side. A fastening hole 36 penetrating in the thickness direction is formed in the side wall 24A of the right back side member 24. When the fastening shaft 35 is inserted into the fastening hole 36 and fastened, the side airbag unit 30 is attached to the outer surface of the side wall portion 24 </ b> A of the back side member 24. In the present embodiment, the fastening shaft 35 is a bolt, and is fastened around the fastening hole 36 by attaching a nut 37 to the tip that has passed through the fastening hole 36. In another embodiment, the fastening shaft 35 may be provided with a check claw at the tip and locked to the periphery of the fastening hole 36 in the check claw. The side airbag unit 30 is attached to the back side member 24 so that the longitudinal directions of the side airbag unit 30 and the inflator 32 are parallel to the longitudinal direction of the back side member 24.

  The inflator 32 is connected to an ECU (not shown) of the vehicle, and generates a gas when the signal is received from the ECU to deploy the side airbag 31.

  The seat back pad 21 is formed of a flexible cushion material such as polyurethane foam. The seat back pad 21 has a central portion 41 disposed between the left and right back side members 24, and side portions 42 connected to the left and right sides of the central portion 41 and disposed around the corresponding back side member 24. . The central portion 41 faces the occupant's upper back, and the left and right side portions 42 face the occupant's upper side. Each side portion 42 protrudes from the left and right sides of the central portion 41 to the left and right outwards and forwards to the front side of the back side member 24, and from the left and right outer sides of the side front portion 42A to the back side member 24. And a side end portion 42B extending rearwardly outside the side airbag unit 30, and a side rear portion 42C extending from the rear side of the side end portion 42B to the left and right inward and disposed on the rear side of the backside member 24. Have A hanging groove 43 is formed at the boundary between the central portion 41 and the left and right side portions 42. A wire (not shown) for suspending (hanging) the skin material 22 is provided at the bottom of the suspending groove 43.

  A pad-side slit 44 that penetrates the seat back pad 21 in the thickness direction and extends substantially parallel (up and down) to the side member is formed in a portion located on the right and left outer sides of the back side member 24 on the right side of the seat back pad 21. Is formed. The pad side slit 44 is disposed at a position facing the side airbag unit 30. In the present embodiment, the pad side slit 44 is disposed on the right and left outer sides and the front side of the right back side member 24, and is formed at the boundary between the right side front portion 42A and the side end portion 42B of the seat back pad 21. Has been. The pad side slit 44 is normally kept closed by the elastic force (shape retention force) of the seat back pad 21.

  A backing material 45 is bonded to the back surface of the seat back pad 21. The backing material 45 may be a nonwoven fabric or a woven fabric, for example. For example, the backing material 45 may be integrally bonded when the seat back pad 21 is foam-molded. Further, the backing material 45 may be provided on the wall surface in the pad-side slit 44 and the peripheral edge of the pad-side slit 44 on the surface of the seat back pad 21.

  The skin material 22 is made of synthetic leather, fabric, or the like. The skin material 22 is put on the seat back pad 21 and is fixed to the surface of the seat back pad 21 by being suspended in the suspension groove 43. A hook 46 is provided on the edge of the skin material 22, and the hook 46 is hooked on a wire 47 that is a metal rod provided on the right side member 24. A back cover 49 is provided on the back of the seat back 3 to cover the opening formed by the edge of the skin material 22. The back cover 49 is formed of the same material as that of the skin material 22 and is coupled to the edge of the skin material 22 by a fastener or a hook-and-loop fastener.

  A skin-side slit 51 that penetrates the skin material 22 is formed at a portion corresponding to the pad-side slit 44. The skin-side slit 51 extends along the pad-side slit 44 at a position shifted by a predetermined distance in the left-right direction with respect to the pad-side slit 44. In the present embodiment, the skin-side slit 51 is arranged offset from the pad-side slit 44 by a predetermined distance on the left and right inward. The edge of the skin-side slit 51 in the skin material 22 is folded and stitched to form an ear. The edges that define the skin-side slit 51 are sewn together by a suture 53, and the opening formed by the skin-side slit 51 is sealed. In the state in which the skin material 22 is put on the seat back pad 21, the skin-side slit 51 takes a linear shape that is elongated vertically.

  A holding sheet 60 that couples the seat back pad 21 and the back side member 24 is coupled to the back surface of the seat back 3 pack. The holding sheet 60 is a sheet-like member formed from a nonwoven fabric, a woven fabric, or a resin sheet. As shown in FIGS. 3 and 4, the holding sheet 60 has a pad coupling portion 61 that is stretched forward and backward with its surface facing left and right, and stitched to the backing material 45 of the seat back pad 21 at the front end. The coupling portion 62 has a frame coupling portion 62 coupled to the backside member 24, and the gripping portion 63 has a gripping portion 63 extending rearward of the backside member 24. The holding sheet 60 gradually increases in width vertically from the frame coupling portion 62 to the pad coupling portion 61, and the vertical width of the pad coupling portion 61 is formed larger than the vertical width of the frame coupling portion 62. A sheet hole 64 that penetrates in the thickness direction of the holding sheet 60 is formed in the frame coupling portion 62. The frame coupling portion 62 is formed in a substantially circular shape with the seat hole 64 as the center.

  As shown in FIG. 3, the pad coupling portion 61 of the holding sheet 60 is coupled to a portion corresponding to the front end of the back side member 24 on the right side of the backing material 45 of the seat back pad 21. That is, the pad coupling portion 61 of the holding sheet 60 is coupled to the backing material 45 of the seat back pad 21 in the vicinity of the front edge wall portion 24B of the right back side member 24. The pad coupling portion 61 of the holding sheet 60 is slightly offset left and right from the portion facing the front edge wall portion 24B of the right back side member 24 or the portion facing the front edge wall portion 24B of the right back side member 24. In such a portion, it may be bonded to the backing material 45 of the seat back pad 21.

  The pad coupling portion 61 of the holding sheet 60 is stitched to the backing material 45 of the seat back pad 21. In other embodiments, the pad coupling portion 61 of the holding sheet 60 and the backing material 45 may be coupled by bonding, engagement with a button, or the like. The stitched portion between the pad coupling portion 61 and the backing material 45 extends vertically. Since the pad coupling portion 61 is formed to have a larger vertical width than the frame coupling portion 62, the stitching range with the backing material 45 can be widened.

  The frame coupling portion 62 of the holding sheet 60 is disposed between the outer surface of the side wall portion 24A of the back side member 24 and the retainer 33 of the side rare bag unit, and is sandwiched between the back side member 24 and the side rare bag unit. Yes. Thereby, the holding sheet 60 is securely fixed to the backside member 24. The fastening shaft 35 that fastens the side airbag unit 30 and the backside member 24 passes through the seat hole 64 of the frame coupling portion 62 and fixes the frame coupling portion 62 to the backside member 24. It is preferable that the pad coupling portion 61 and the frame coupling portion 62 of the holding sheet 60 are not loosened in a state where the frame coupling portion 62 is coupled to the backside member 24.

  The holding portion 63 of the holding sheet 60 protrudes rearward from between the back side member 24 and the side rare bag unit. The holding portion 63 of the holding sheet 60 is sandwiched between the rear edge wall portion 24 </ b> C of the back side member 24 and the side rear portion 42 </ b> C of the seat back pad 21.

  Further, the back side member 24 and the skin material 13 are joined together by a webbing 70. The webbing 70 has a width in the vertical direction and extends in the horizontal direction. One end in the extending direction of the force cloth 70 is stitched to an edge portion that forms the front edge of the skin-side slit 51 of the skin material 13. The other end in the extending direction of the force cloth 70 branches into an upper branch portion 71 located on the upper side and a lower branch portion 72 located on the lower side. The tips of the upper branch portion 71 and the lower branch portion 72 are coupled to the back side member 24 via a clip 73. The force cloth 70 extends from the back side member 24 along the backing material 45, and then passes through the pad side slit 44 and extends to the front edge of the skin side slit 51.

  The upper branch portion 71 and the back side member 24 are coupled to each other above the frame coupling portion 62 of the holding sheet 60, and the lower branch portion 72 and the back side member 24 are coupled to each other below the frame coupling portion 62. Is arranged. The holding sheet 60 extends between the upper branch portion 71 and the lower branch portion 72 from the frame coupling portion 62 to the pad coupling portion 61.

  The operation and effect of the sheet 1 configured as described above will be described. As shown in FIG. 5, when the side airbag 31 is deployed, the side airbag 31 inflates toward the pad side slit 44 along the webbing 70. When pushed by the inflating side airbag 31, the seat back pad 21 is deformed and the pad side slit 44 is expanded. Further, when pushed by the inflating side airbag 31, the suture thread 53 that seals the skin-side slit 51 is broken, and the skin-side slit 51 is expanded. As a result, the side airbag 31 passes through the pad side slit 44 and the skin side slit 51 and is deployed outside the seat 1. Since the stitched portion of the pad coupling portion 61 and the backing material 45 extends vertically, the peripheral portion of the pad side slit 44 of the side front portion 42A of the seat back pad 21 is held when the side airbag 31 is deployed. It can be deformed outward (forward) around the stitched portion with the sheet 60.

  During normal times except when the side airbag 31 is deployed, the seat back pad 21 and the skin material 22 are maintained in a predetermined shape, and therefore the gap between the pad side slits 44 is maintained in a closed state. When an occupant seated on the seat 1 comes into contact with the seat back 3, the seat back pad 21 and the skin material 22 are elastically deformed to temporarily open the pad side slit 44, but when the seat back pad 21 is restored, the pad side slit 44 is restored. Returns to the closed form.

  When the seat back pad 21 is deformed by receiving an external force from the occupant, the holding seat 60 pulls a portion in the vicinity of the back side member 24 on the back surface of the seat back pad 21 and restricts movement relative to the back side member 24. Thereby, the position shift of the seat back pad 21 with respect to the back side member 24 is suppressed. If the seat back pad 21 is displaced with respect to the back side member 24, the seat back pad 21 may be caught by the back side member 24 at the position where the displacement is caused, and the original state may not be restored. The holding sheet 60 can be reliably restored to the initial form after the seat back pad 21 is elastically deformed by suppressing the positional deviation of the seat back pad 21 with respect to the back side member 24. As a result, the problem that the skin side slit 51 and the pad side slit 44 are kept open is less likely to occur.

  Since the holding seat 60 extends rearward from the front end coupled to the back surface of the seat back pad 21 and passes between the back side member 24 and the side airbag unit 30, the deployment of the side airbag 31 is obstructed. There is nothing.

  The grip portion 63 provided at the rear end of the holding sheet 60 has an effect of facilitating the assembly work of the sheet 1. The operator can place the holding sheet 60 in an appropriate position with respect to the back side member 24 by putting the seat back pad 21 on the seat back frame 20 and then pulling the grip portion 63 of the holding sheet 60. Thereafter, the operator inserts the fastening shaft 35 of the side airbag unit 30 into the seat hole 64 and the fastening hole 36 while holding the grip portion 63 of the holding sheet 60, so that the holding sheet 60 and the side airbag unit 30 are moved. It can be fixed to the backside member 24.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. In the above embodiment, an example in which the pad side slit 44 is provided at the boundary between the side front portion 42A and the side end portion 42B of the seat back pad 21 has been described. However, as shown in FIG. 44 may be provided at the side end 42B. For example, the pad side slit 44 may be disposed at a position facing the front edge of the side airbag unit 30, and the skin side slit 51 may be disposed at a position facing the pad side slit 44.

  Further, as shown in FIG. 6, the connecting portion (sewn portion) of the pad connecting portion 61 of the holding sheet 60 to the backing material 45 overlaps with the front edge wall portion 24 </ b> B of the back side member 24 in the front-rear direction, that is, directly faces. It may be arranged in a position.

1: Seat 2: Seat cushion 3: Seat back 20: Seat back frame 21: Seat back pad 22: Skin material 24: Back side member 24A: Side wall portion 24B: Front edge wall portion 24C: Rear edge wall portion 30: Side air Bag unit 31: Side airbag 32: Inflator 32A: Housing 33: Retainer 35: Fastening shaft 36: Fastening hole 37: Nut 42: Side portion 42A: Side front portion 42B: Side end 44: Pad side slit 45: Lining material 51: Skin side slit 60: Holding sheet 61: Pad coupling part 62: Frame coupling part 63: Grasping part 64: Sheet hole 70: Riding

Claims (9)

A vehicle seat having a seat cushion and a seat back,
A seat back frame including a pair of left and right side members extending vertically;
A side airbag unit attached to the side member;
A flexible seat back pad supported by the seat back frame and covering the side member and the side airbag unit, the seat back pad penetrating in a thickness direction in a portion facing the side airbag unit And extending substantially parallel to the side member, and has a pad side slit through which an airbag deployed from the side airbag unit can pass,
Covering the surface of the seat back pad, and a skin material having a skin side slit in a portion corresponding to the pad side slit,
A pad coupling portion coupled to a portion corresponding to the side member on the back surface of the seat back pad; and a frame coupling portion sandwiched between the side member and the side airbag unit. And a holding sheet for fixing the position of the seat back pad with respect to the vehicle seat.   The vehicle seat according to claim 1, wherein the holding seat has a seat hole through which a fastening shaft for fastening the side airbag unit to the side member passes. A backing material is bonded to the back surface of the seat back pad,
The vehicle seat according to claim 1, wherein the holding sheet is stitched to the backing material. The side airbag unit is provided on an outer surface facing the left and right outward of the side member,
The vehicle seat according to any one of claims 1 to 3, wherein the pad-side slit is disposed on the left and right outer sides of the left and right side members in the seat back pad. .   5. The vehicle seat according to claim 4, wherein the pad side slits are opened on left and right outer surfaces of the seat back pad.   The vehicle seat according to claim 4 or 5, wherein the pad side slit is disposed in front of the left and right side members in the seat back pad.   The vehicle seat according to any one of claims 1 to 6, wherein the holding seat is coupled to the seat back pad in front of a front edge of the side member.   8. The holding sheet according to any one of claims 1 to 7, wherein a vertical width of a portion coupled to the seat back pad is formed larger than a portion coupled to the side member. The vehicle seat according to the item.   The vehicle seat according to any one of claims 1 to 8, wherein the holding sheet includes a grip portion extending rearward from between the side member and the side airbag unit.

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