JP2008080834A - Vehicular seat device having side airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the internal pressure of an airbag body in deployment by a simple constitution. <P>SOLUTION: A vehicular seat device comprises a side airbag module in which a fastening piece 36 for an inflator is projected from a module case 34 storing an airbag body, and a part of gas fed to an airbag body 32 is allowed to flow out from an opening end 36A of the fastening piece 36, and a seat pad 20 having a proximity opposing unit 20C (a regulating means) for regulating the outflow of the gas from the opening end 36A of the fastening piece 36. The outflow of the gas from the opening end 36A can be regulated by a simple constitution that the proximity opposing unit 20C is provided on the seat pad 20, much gas is fed to the airbag body 32, and the internal pressure of the airbag body 32 can be increased thereby. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle seat device including a side airbag device.

A side airbag in which the gas outlet of the inflator is disposed adjacent to any one of the upper and lower walls of the seat pad storage portion having a hollow section having a substantially concave shape, and a thin portion is formed on a part of the front wall of the storage portion An apparatus built-in sheet is disclosed (see Patent Document 1).
Japanese Patent No. 3642893 JP 2003-34214 A Japanese Patent Laid-Open No. 10-194071

  In the airbag module, when the structure in which the end portion of the inflator fastener is protruded from the module case storing the airbag bag body and the inflator is inserted and fastened from the end portion is adopted, Instead of or in addition to the vent hole provided for adjusting the internal pressure, a part of the high-pressure gas during deployment of the airbag bag body from the gap between the fastening bracket and the inflator at the end of the fastening bracket By allowing the air bag to flow out, it is possible to moderately suppress the internal pressure of the airbag bag body.

  However, in order to increase the internal pressure of the airbag bag body while sharing parts such as the inflator, the fastening bracket, and the module case, the part of the high-pressure gas is allowed to flow as it is from the end of the fastening bracket in this way. It is thought to be a hindrance.

  In the prior art described in Patent Document 1 described above, the inflator is disposed inside the module case, and is not configured to allow gas to flow out of the module case when the inflator is activated.

  In view of the above facts, an object of the present invention is to increase the internal pressure of an airbag bag body during deployment with a simple configuration.

  According to the first aspect of the present invention, a fastening bracket for an inflator is provided so as to protrude from a module case containing an airbag bag body, and the inflator is inserted into the module case from the opening end of the fastening bracket and fastened. A side airbag module configured to allow a part of gas supplied to the airbag bag body to flow out from the opening end of the fastening fitting during operation, and the side airbag in a notch provided on a side portion And a seat pad provided with restricting means for restricting outflow of the gas from the opening end of the fastener.

  In the vehicle seat device including the side airbag device according to claim 1, a part of the gas supplied to the airbag bag body when the inflator is activated can flow out from the opening end of the fastening fitting. Since the seat pad on which the bag module is disposed is provided with a restricting means for restricting the outflow of gas from the opening end of the fastening fitting, a large amount of gas is supplied to the airbag bag body when the inflator is activated. For this reason, it is possible to raise the internal pressure of the airbag bag body at the time of expansion | deployment with the simple structure of providing a control means in a seat pad.

  According to a second aspect of the present invention, in the vehicle seat device including the side airbag device according to the first aspect, the restricting means is provided integrally with the seat pad and closes the opening end of the fastening member. It is a proximity facing portion with respect to the opening end configured as described above.

  In the vehicle seat device including the side airbag device according to claim 2, a proximity facing portion with respect to the opening end of the fastening member configured to close the opening end of the fastening member is provided integrally with the seat pad. Therefore, it is possible to increase the internal pressure of the airbag bag body at the time of deployment with a simpler configuration that only changes the shape of the seat pad.

  As described above, according to the vehicle seat device including the side airbag device according to the first aspect of the present invention, the internal pressure of the airbag bag body at the time of deployment can be increased with a simple configuration. An excellent effect is obtained.

  According to the vehicle seat device including the side airbag device according to claim 2, the internal pressure of the airbag bag body at the time of deployment can be increased with a simpler configuration that only changes the shape of the seat pad. An excellent effect is obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a vehicle seat device 10 including a side airbag device according to the present embodiment includes, as a basic configuration, a seat cushion 12 on which an unillustrated occupant can be seated, and a seat back that serves as the back of the occupant. 14, and a side airbag module 18 in the side airbag device is arranged in a seat pad 20 (FIG. 3) of the seat back 14.

  The seat back 14 is configured by disposing a seat pad 20 formed in a predetermined shape around a seat back frame (not shown) serving as a skeleton, and covering the seat pad 20 with a seat skin. A side airbag module 18 is disposed on the side portion 14 </ b> A in the vehicle width direction of the seat back 14.

  The seat skin covering the surface of the seat back 14 is, for example, a center skin 24 covering the center front surface of the seat back 14, and a front skin covering the front surface of the vehicle width direction outer side portion 14A of the seat back 14 stitched to the center skin 24. 26, a rear skin (not shown) that covers the rear surface of the central portion of the seat back 14, and a side skin 28 that is stitched to the rear skin and covers the side surface from the rear surface 14A of the side portion 14A in the vehicle width direction of the seat back 14. Has been. The front epidermis 26 and the side epidermis 28 are stitched together at the stitching portion 30, and the stitching portion 30 is cleaved by the deployment pressure of the airbag bag body 32 (FIG. 7) when the side airbag module 18 is actuated. The bag bag body 32 is configured to bulge out of the seat back 14.

  In FIG. 2, in the side airbag module 18, a fastening fitting 36 for an inflator 38 protrudes from a module case 34 in which an airbag bag body 32 (FIG. 7) is folded and stored. The inflator 38 is inserted into the module case 34 from the opening end 36 </ b> A of the fastening fitting 36 and fastened. A part of the gas supplied to the airbag bag body 32 when the inflator 38 is operated is opened in the fastening fitting 36. It can flow out from the end 36A.

  The module case 34 is configured to be wide in the vertical direction and thickness direction of the seat back 14 and thin in the vehicle width direction, for example, and a front end edge 34A close to the stitching portion 30 (FIG. 1) is deployed in the airbag bag body 32. Sometimes it is configured to open by its deployment pressure. The fastening bracket 36 is provided so as to protrude from the rear end edge 34 </ b> B of the module case 34 toward the lower side of the seatback 14, for example.

  As shown in FIG. 2, the gas ejection portion 38A of the inflator 38 inserted into the module case 34 from the opening end 36A of the fastening bracket 36 is located inside the module case 34, and when the inflator 38 is operated, A large amount of gas ejected from the gas ejection part 38 </ b> A is supplied to the airbag body 32 folded and stored in the module case 34.

  Of the inflator 38, an end 38B located on the opposite side of the gas ejection portion 38A is fastened to the fastening fitting 36 by, for example, caulking the fastening fitting 36, and the open end 36A is not sealed. Therefore, when the inflator 38 is operated, a part of the gas supplied from the gas ejection part 38A to the airbag bag body 32 can flow out of the opening end 36A through the gap between the inflator 38 and the fastening fitting 36. . That is, the side airbag module 18 can use the opening end 36 </ b> A of the fastening fitting 36 as a vent hole for adjusting the internal pressure of the airbag bag body 32.

  A wire harness 40 for flowing an operating current from an airbag ECU (not shown) to the inflator 38 is connected to the end 38B of the inflator 38 using a connector 42, for example. The wire harness 40 and the connector 42 are arranged so as not to protrude from the outermost end portion of the opening end 36 </ b> A in the fastening fitting 36, and the wire harness 40 is drawn from the connector 42 in the radial direction of the fastening fitting 36, for example. .

  In FIG. 3, the seat pad 20 is configured such that the side airbag module 18 can be disposed in a notch 20 </ b> K provided in the side portion 20 </ b> A, and restricting means for restricting the outflow of gas from the opening end 36 </ b> A of the fastening bracket 36. This is a cushion material for the seat back 14 provided with the proximity facing portion 20C as an example. In the example shown in FIG. 3, the notch 20K is open to the rear of the vehicle, the front wall 20D of the notch 20K is formed substantially parallel to the front edge 34A of the module case 34, and the ceiling surface 20E is the seat. The module case 34 is formed so as to move away from the upper end edge 34 </ b> E toward the rear of the pad 20.

  The proximity facing portion 20C is fixedly provided with the seat pad 20 on the bottom surface 20F of the notch portion 20K. Specifically, the bottom surface 20F is formed so that the distance from the lower end edge 34F of the module case 34 increases toward the rear of the seat pad 20, and the proximity facing portion 20C is formed in the rear half of the bottom surface 20F. It is formed as a build-up part.

  The side airbag module 18 is fixed to a seat frame (not shown) in the notch 20K of the seat pad 20, and the proximity facing portion 20C closes the opening end 36A of the fastening fitting 36 of the side airbag module 18. It is configured as follows. By increasing the degree of blockage of the opening end 36A by the proximity facing portion 20C, the amount of gas flowing out from the opening end 36A can be reduced, and the internal pressure of the airbag bag body 32 can be adjusted to be further increased. Yes.

  The shape of the notch 20K is not limited to that shown in FIG. For example, as shown in FIG. 4, the ceiling surface 20E and the bottom surface 20F are formed substantially parallel to the upper end edge 34E and the lower end edge 34F of the module case 34, respectively, so that a part of the bottom surface 20F directly becomes the proximity facing portion 20C. You may comprise. Further, as shown in FIG. 5, the side portion 20A of the seat pad 20 is placed so that the ceiling surface 20E and the bottom surface 20F of the notch 20K are substantially parallel to the upper edge 34E and the lower edge 34F of the module case 34, respectively. The cutout portion 20K may be formed in a shape that is hollowed out into a substantially square shape, and a part of the bottom surface 20F may be configured as the close facing portion 20C as it is.

  Further, the protruding direction of the fastening fitting 36 in the side airbag module 18 is not particularly limited. For example, as shown in FIG. 6, the fastening fitting 36 is located behind the seat pad 20 from the rear end edge 34B of the module case 34. The cutout portion 20K is formed by hollowing out the side portion 20A of the seat pad 20 in accordance with the shape of the side airbag module 18, and the rear wall portion 20B of the cutout portion 20K is formed. The proximity facing portion 20C may be provided in a part.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the vehicle seat device 10 provided with the side airbag device, when the airbag ECU determines a side collision of the vehicle in response to a signal from a side collision sensor or the like (not shown), in FIG. (Not shown) an operating current is passed through the wire harness 40 to the inflator 38. By this operating current, an igniter (not shown) built in the end portion 38B of the inflator 38 is operated, so that gas is generated in the inflator 38 and is ejected from the gas ejection portion 38A. By supplying this gas to the airbag bag body 32 folded and housed in the module case 34, the airbag bag body 32 starts to be deployed. When the airbag bag body 32 starts to be deployed, first, the front end edge 34A of the module case 34 is cleaved by the deployment pressure of the airbag bag body 32, and the airbag bag body 32 expands out of the module case 34. As shown in FIG. 7, the airbag bag body 32 inflated from the module case 34 is then opened to the front of the seat back 14 by tearing the seat pad 20 and the stitched portion 30 of the seat cover, not shown. The seated occupant can be restrained from the side.

  In the side airbag module 18, part of the gas supplied from the inflator 38 to the airbag bag body 32 when the airbag bag body 32 is deployed passes through the gap between the fastening fitting 36 and the inflator 38. It is possible to flow out from the open end 36A. However, in the present embodiment, since the outflow of gas from the opening end 36A can be regulated by the proximity facing portion 20C provided in the seat pad 20, more gas is supplied to the airbag bag body 32. Thus, the internal pressure of the airbag bag body 32 can be increased.

  The internal pressure of the airbag bag body 32 can be easily adjusted by the degree of obstruction of the opening end 36A by the proximity facing portion 20C. For example, if the closeness of the opening end 36A by the proximity facing portion 20C is increased by bringing the proximity facing portion 20C closer to the opening end 36A or the like, the amount of gas outflow from the opening end 36A is reduced accordingly. It is possible to adjust the internal pressure of the bag bag body 32 to be further increased. In particular, since the proximity facing portion 20C is provided on the seat pad 20 in a constant manner, the internal pressure of the airbag bag body 32 at the time of deployment is increased with a simple configuration that only changes the shape of the seat pad 20. Is possible. Thus, by securing the tuning allowance in the direction of increasing the internal pressure of the airbag bag body 32 on the seat pad 20 side, the side airbag module 18 can be shared and the cost can be reduced.

  In the above embodiment, the proximity facing portion 20C is described as an example of the restricting means for restricting the outflow of gas from the opening end 36A of the fastening bracket 36. However, the present invention is not limited to this, and the outflow of gas from the opening end 36A is not limited thereto. The part for regulation should just be provided in the notch part 20K of the seat pad 20. FIG. Moreover, although the wire harness 40 and the connector 42 were demonstrated as what does not protrude from the extreme end part of the opening end 36A in the fastening metal fitting 36, it is not restricted to this, Temporarily, the wire harness 40 or the connector 42 is from this extreme end part. When protruding, the adjacent facing portion 20C of the seat pad 20 may be formed in a concave shape corresponding to the protruding shape. That is, a recess for preventing interference with the wire harness 40 and the connector 42 may be provided in the proximity facing portion 20C.

It is a perspective view of the vehicle seat apparatus provided with the side airbag apparatus. It is a perspective view of a side airbag module. It is a side view which shows the seat pad by which the proximity | contact counter part was provided in the form piled up on the bottom face of a notch part, and the side airbag module arrange | positioned at this notch part. The seat pad in which the bottom surface of the notch is formed substantially parallel to the lower end edge of the module case, and a part of the bottom surface is used as it is as a proximity facing portion, and the side airbag module disposed in the notch are shown. It is a side view. It is a side view which shows the seat pad by which the notch part was formed in the form which cut out the seat pad, and the side airbag module arrange | positioned in this notch part. The side airbag module is configured such that the inflator fastening bracket protrudes from the rear edge of the module case to the rear of the seat pad, and the notch is formed by cutting out the seat pad corresponding to the side airbag module. It is a side view which shows the formed seat pad. It is a side view which shows the state which the side airbag apparatus act | operated and the airbag bag body expand | deployed ahead of the seat back.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle seat apparatus provided with side airbag apparatus 18 Side airbag module 20 Seat pad 20A Side part 20C Proximity facing part (regulation means)
20K Notch 32 Airbag Bag 34 Module Case 36 Fastening Bracket 36A Open End 38 Inflator

Claims (2)

A fastening bracket for an inflator is provided so as to protrude from a module case containing the airbag bag body, and the inflator is inserted into the module case from the opening end of the fastening bracket and fastened. When the inflator is activated, the airbag bag A side airbag module configured such that a part of the gas supplied to the body can flow out from the opening end of the fastener;
A seat pad provided with a regulating means for regulating the outflow of the gas from the opening end of the fastener, the side airbag module being configured to be disposed in a notch provided in a side portion;
A vehicle seat device comprising a side air bag device.   2. The side according to claim 1, wherein the restricting unit is a proximity facing portion with respect to the opening end that is provided integrally with the seat pad and is configured to close the opening end of the fastening member. A vehicle seat device including an airbag device.

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