JPH1191487A - Side collision air bag device for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side collision air bag device of an automobile on which the longitudinal size of the whole seat back can be reduced and reinforcing cloth can be shortened. SOLUTION: Since a bar 28 can be installed on a car outside side surface of a module bracket 11 by fixing an air bag module M to a front face of the module bracket (a seat back frame) 11, the longitudinal size of the whole seat back 1 can be reduced, and reinforcing cloth can also be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side collision airbag device for an automobile.

[0002]

2. Description of the Related Art In an airbag device for an automobile, an airbag for a side collision in which an airbag is deployed forward from a side portion of a seat back at the time of a side collision of a vehicle and an occupant is protected by the airbag. There is an apparatus (see Japanese Patent Application Laid-Open No. Hei 9-136598 as a similar technique).

[0003] In this type of airbag device, an airbag module is fixed to a vehicle outside surface of a seatback frame forming a skeleton of a seatback, and a pad portion is provided in front of the seatback frame and the airbag module via a pad portion. Thus, a skin cover having a cleavage portion is held. Further, a reinforcing cloth is provided on the back side of a portion corresponding to the gusset portion of the skin cover so that the inflation force of the airbag is concentrated on the cleavage portion. The front end of the reinforcing cloth is attached to the cleavage portion, and the rear end goes around the rear side of the airbag module and is fixed to a bar installed on the rear side of the airbag module. The reason why the bar is installed on the rear side of the airbag module is that the airbag module is mounted on the vehicle outside surface of the seat back frame, and the bar cannot be mounted on the vehicle outside of the seat back frame.

[0004]

However, in such a conventional technique, since the bar is installed on the rear side of the seat back frame, the size of the entire seat back in the front-rear direction is enlarged, and the vehicle interior is reduced. Squeezing space. Further, since the rear end of the reinforcing cloth needs to be extended to the bar on the rear side of the seat back frame and fixed, the reinforcing cloth becomes long, which is disadvantageous in cost.

The present invention has been made by paying attention to such a conventional technique, and provides an airbag device for a side collision of an automobile which can reduce the front-rear size of the entire seat back and shorten the reinforcing cloth. To provide.

[0006]

According to the first aspect of the present invention,
The airbag module is fixed to the front of the seat back frame, and on the vehicle outer side of the seat back frame,
A bar is attached to fix the rear end of the reinforcing cloth whose front end is attached to the tearing portion of the skin cover.

According to the first aspect of the present invention, since the airbag module is fixed to the front surface of the seatback frame, the bar can be attached to the vehicle outer side surface of the seatback frame. Can be reduced, and the reinforcing cloth can be shortened.

According to a second aspect of the present invention, the seat back frame includes a unit frame forming a skeleton of the seat back, and a module bracket attached to the unit frame, and the airbag module is fixed to a front surface of the module bracket. , A bar is attached to the outer surface of the module bracket.

According to the second aspect of the present invention, since the airbag module and the bar are previously mounted on the module bracket, the work of mounting them is facilitated.

According to the third aspect of the present invention, the bar is attached to the outer side surface of the seat back frame by fastening means having an attaching direction along the vehicle width direction.

According to the third aspect of the present invention, since the tension of the reinforcing cloth applied when the airbag is deployed acts in a direction different from the mounting direction of the fastening means, the fastening means does not come off and the reinforcing cloth is applied to the reinforcing cloth. A high reaction force can be generated.

[0012]

According to the first aspect of the present invention, since the airbag module is fixed to the front surface of the seatback frame, the bar can be attached to the outer side surface of the seatback frame. The front and rear size can be reduced, and the reinforcing cloth also becomes shorter.

According to the second aspect of the present invention, since the airbag module and the bar are mounted on the module bracket in advance, the work of mounting them is facilitated.

According to the third aspect of the invention, since the tension of the reinforcing cloth applied when the airbag is deployed acts in a direction different from the mounting direction of the fastening means, the fastening means does not come off, and the reinforcing cloth is applied to the reinforcing cloth. A high reaction force can be generated.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes a rear seat back of an automobile.
It is fixed to a seat back panel (vehicle body) not shown. Inside the rear seat back 1, a seat back frame S as a frame member is disposed. The seat back frame S includes a unit frame 2 and a module bracket 11, and the unit frame 2 is further divided into an upper frame 3 and a lower frame 4.
The upper frame 3 and the lower frame 4 are configured to be bent at a connection portion. When an operation button (not shown) is pressed, the lower frame 4 moves forward together with the seat cushion 5 (X direction in FIG. 2). Depending on the upper frame 3
Move downward (Y direction in FIG. 2).

The upper frame 3 is provided with fixing brackets 6 on both left and right sides, and the fixing brackets 6 are fixed to a seat back panel (vehicle body) (not shown) so as to be vertically slidable. An upper mounting piece 7 facing upward and a lower mounting piece 8 facing downward are formed at upper and lower ends of the outer frame end of the upper frame 3. A welding bolt 9 facing obliquely inward is mounted on the upper mounting piece 7, and a welding nut (not shown) is mounted on the lower mounting piece 8.

An airbag module M is fixed to the front surface of the module bracket 11 in advance.
A back bracket 12 is attached to the inside of the module bracket 11 in advance by a bolt / nut means 14 via a connection bracket 13 (see FIG. 2). This is to increase the width of the module bracket 11 to reliably receive the pressure applied from the back of the occupant.

Further, a long hole 15 in the vertical direction is formed at the upper end of the module bracket 11, and a mounting hole 16 is formed at the lower end. In addition, a hook portion 17 (bending rearward) that can be locked to the upper end of the upper mounting piece 7 is also formed at the upper end portion. Therefore, the hook portion 17 is locked to the upper end of the upper mounting piece 7 and temporarily fixed, and the welding bolt 9 of the upper mounting piece 7 is passed through the elongated hole 15 to fasten a nut (not shown) to the welding bolt 9. Then, the module bracket 11 is mounted by positioning a welding nut (not shown) of the lower mounting piece 8 with the mounting hole 16 and fastening a bolt in the mounting hole 16.

As described above, the upper end and the lower end of the module bracket 11 to which the airbag module M is fixed in advance are mounted on the upper mounting piece 7 and the lower mounting piece 8 of the airbag module M from the front side, respectively. Therefore, the airbag module M can be securely mounted even in the rear seatback 1 having a small distance from the side wall of the vehicle body.

Further, a bar 28 is attached to the outer surface of the module bracket 11 at a predetermined distance from the outer surface of the module bracket 11. The bar 28 is formed of a pipe, and its upper and lower ends are flattened. And
The flattened upper and lower ends are attached by bolts 29 as "fastening means" from the outside of the vehicle in a mounting direction along the vehicle width direction. Since the bar 28 is also attached to the module bracket 11 in advance, the operation of attaching the bar 28 is also easy.

A skin cover 27 is held on the front side of the module bracket 11 and the airbag module M via a pad 25. The outermost sewn portion H of the skin cover 27 is a “cleaved portion” and the airbag module M
The airbag inside breaks through here and deploys forward.

A front end of a reinforcing cloth 30 is attached to the sewn portion H, and a loop-shaped rear end of the reinforcing cloth 30 is connected to a bar 28 attached to the outer side surface of the module bracket 11. It is fixed to. With the setting of the reinforcing cloth 30, the force of the airbag deployed from the airbag module M is concentrated on the sewn portion H, and the airbag module is reliably torn from the sewn portion H.

According to this embodiment, since the airbag module M is fixed to the front surface of the module bracket 11, the bar 28 can be mounted on the outer side surface of the module bracket 11, so that the front and rear size of the rear seat back 1 can be reduced. The length of the reinforcing cloth 30 can be reduced as compared with the case where the bar 28 is installed on the rear side of the module bracket 11 as in the related art.

Further, since the tension F of the reinforcing cloth 30 applied when the airbag is deployed acts in a direction different from the direction R in which the bolts 29 are removed, the bolts 30 do not come off.
A high reaction force can be generated for the reinforcing cloth 30.

In the above embodiment, the rear seat is used as an example, but the present invention can be applied to a front seat.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rear seat back according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the rear seat back as viewed in a direction along a line SA-SA shown in FIG.

FIG. 3 is an exploded perspective view showing the internal structure of the rear seat back.

FIG. 4 is a front view showing the internal structure of the rear seat back.

FIG. 5 is a sectional view taken along the line SB-SB shown in FIG. 4;

[Explanation of symbols]

 2 Unit frame 11 Module bracket 27 Skin cover 28 Bar 29 Bolt (fastening means) 30 Reinforcement cloth S Seat back frame M Airbag module H Sewing part (cleavage part)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tsuyoshi Ebihara Nissan Motor Co., Ltd., 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture (72) Inventor Yasukazu Kanda 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture, Nissan Motor Co., Ltd. ( 72) Inventor Shunsuke Hijikata 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Inside Nissan Motor Co., Ltd. (72) Inventor Masashi Okumura 2 Takaracho, Kanagawa-ku, Yokohama City, Kanagawa Prefecture Nissan Motor Co., Ltd. (72) Naoki Maeda, Kanagawa Prefecture Nissan Motor Co., Ltd. (72) Inventor Go Esaka 5-791-1 Hibarigaoka, Zama City, Kanagawa Prefecture Nissan Techno Co., Ltd.

Claims (3)

[Claims] An airbag module is fixed to a front surface of a seat back frame, and a bar for fixing a rear end of a reinforcing cloth whose front end is attached to a split portion of a skin cover is mounted to an outer side surface of the vehicle. An airbag device for a side collision of an automobile, wherein 2. The side airbag device for an automobile according to claim 1, wherein the seat back frame comprises a unit frame forming a skeleton of the seat back, and a module bracket attached to the unit frame. An airbag device for a side collision of an automobile, wherein an airbag module is fixed to a front surface of a module bracket, and a bar is attached to an outer side surface of the module bracket. 3. The side airbag device for a vehicle according to claim 1, wherein the bar has a mounting direction along a vehicle width direction with respect to a vehicle outer surface of the seat back frame. An airbag device for a side collision of an automobile, the airbag device being attached by means.