JPH09226497A - Air bag device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a space for an air bag when it is installed in a vehicle in an air bag device for a front passenger seat and the like. SOLUTION: A folded air bag 4 is stored in an upper half part 3 of an air bag case 2 whose upper face is opened, while an inflator 6 is stored in a lower half part of the air bag case 2. The upper half part 3, in which the air bag 4 is folded so as to be stored, of the air bag case 2 is extended from the lower half part 5 toward the vehicle rear side by a required length like a shelf.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular air bag device for improving the space of the air bag device when the air bag device is mounted on the vehicle by improving the air bag case.

[0002]

2. Description of the Related Art In particular, as an airbag device for a passenger seat, as shown in FIG. 4, a folded airbag 4 is housed in the opening 1 side of an airbag case 7 having a U-shaped cross section, and the airbag case is used. A serial type in which a cylindrical inflator 6 is housed inside 7 is known.

As another airbag device for the passenger seat, as shown in FIG. 5, an inflator 6 is housed on the vehicle front side of a rectangular parallelepiped airbag case 8 having an open upper surface, and the airbag case 8 is also provided. There is also known a parallel type in which the folded airbag 4 is housed on the rear side of the vehicle.

[0004]

However, in the former series type airbag device, the opening of the airbag case is small, but the depth is large.

Further, in the latter parallel type airbag device, since the opening of the airbag case is large and this case is a rectangular parallelepiped as it is, there are restrictions such as lack of space when the device is mounted on a vehicle. there were.

An object of the present invention is to cope with the above situation and to find a new structure for an airbag case to reduce the space for mounting the airbag device on a vehicle.

[0007]

That is, the feature of the airbag device of the present invention that meets the above object is that the folded airbag is stored in the upper half of the airbag case whose upper surface is open, while the airbag is In a vehicle airbag device having an inflator housed in the lower half of the case,
The upper half of the airbag case is required to extend rearward from the lower half in the form of a shelf in the vehicle rear direction, and the airbag is folded and stored in the upper half.

Further, in the airbag device of the present invention, it is possible to extend the upper half portion of the airbag case from the lower half portion into a shelf shape in the vehicle front direction.

[0009]

In the air bag device of the present invention, since only the upper half of the air bag case is expanded, the depth can be made smaller than that of the in-line type.
As a result, it is possible to reduce the space of the airbag device mounted on the vehicle and flexibly cope with various types of vehicles. Further, by changing the relative position with respect to the upper half of the lower half of the airbag case, it is possible to regulate the order of introducing the inflator gas into the airbag and control the deployment of the airbag.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing an air bag device for a passenger seat according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing an air bag case of the same embodiment. The airbag device of the above-described embodiment is embedded in an instrument panel, for example, for a passenger seat, and has an airbag case 2 whose upper surface is opened as an opening 1 as shown in FIG. 1, and this airbag. The case 2 has an airbag 4 folded and housed in the upper half 3 thereof, and a cylindrical inflator 6 housed and fixed in the lower half 5 of the airbag case 2.

In this embodiment, as shown in FIGS. 1 and 2, the upper half 3 of the airbag case 2 is replaced with the lower half 5 of the airbag case 2.
A shelf-like offset is provided to extend in the rearward direction of the vehicle, and an airbag 4 is folded and stored in the upper half 3 as shown in the figure. The lower half part 5 of the case for accommodating the inflator 6 is located at a position biased toward the front of the vehicle.

The width W ₁ of the airbag case upper half 3 in the vehicle front-rear direction is considerably larger than the width W ₂ of the case lower half 5, that is, W ₁ > 5 / 3W ₂ , and the width of the upper half 3 of the case is larger. The height H ₁ is considerably lower than the height H ₂ of the lower half 5 of the case, and H ₁ <3 / 5H ₂ .

On the other hand, FIG. 3 shows an airbag device according to a second embodiment of the present invention. This airbag device has the same structure as that of the first embodiment except that the airbag case 2 has a top surface. The half portion 3 has a configuration in which it extends from the lower half portion 5 in the shape of a shelf in the vehicle front direction as shown in the drawing. As a result, the relative position of the lower half part 5 of the airbag case 5 to the upper half part 3 is shifted toward the rear of the vehicle, and as a result, the order of introducing the inflator gas into the airbag 4 is regulated. It is possible to control the expansion of

However, in the airbag device according to each of the embodiments of the present invention, since only the upper half 3 of the airbag case 2 is expanded, the depth is made smaller than that of the conventional serial type shown in FIG. Accordingly, it is possible to reduce the space when the vehicle is mounted, and to flexibly adapt the airbag device to various types of vehicles.

[0016]

As described above, according to the airbag device of the present invention, the upper half portion of the airbag case is extended from the lower half portion in a shelf-like manner in the rearward direction of the vehicle, and the airbag is provided in the upper half portion. The bag is folded and stored, and while the opening of the airbag case is as wide as the conventional parallel type, only the upper half of the airbag case is expanded, so the depth of the airbag case is increased. It is possible to make it smaller than the conventional in-line type, thereby reducing the space when mounted on the vehicle and exhibiting the remarkable effect of flexibly adapting the airbag device to various types of vehicles and mounting it. Is. Further, by shifting the relative position with respect to the upper half of the lower half of the airbag case, it is possible to regulate the order of introducing the inflator gas into the airbag and thereby control the deployment of the airbag.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a passenger-side airbag device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an airbag case of the same embodiment.

FIG. 3 is a sectional view showing an airbag device according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing an example of a conventional airbag device.

FIG. 5 is a cross-sectional view showing another example of a conventional airbag device.

[Explanation of symbols]

 1 Opening 2 Airbag Case 3 Upper Half of Case 4 Airbag 5 Lower Half of Case 6 Inflator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takeshi Yamaji 1-17-18 Edobori, Nishi-ku, Osaka City, Osaka Prefecture Toyo Tire & Rubber Co., Ltd. (72) Toru Ozaki 1-17-118 Edobori, Nishi-ku, Osaka City, Osaka Prefecture No. Toyo Tire & Rubber Co., Ltd.

Claims (2)

[Claims] 1. A vehicle airbag apparatus comprising a folded airbag stored in an upper half of an airbag case having an open top surface and an inflator stored in a lower half of the airbag case. An airbag device for a vehicle, comprising: an upper half portion of a bag case extending from a lower half portion to a shelf shape in a vehicle rearward direction; and an airbag folded and stored in the upper half portion. 2. The airbag device for a vehicle according to claim 1, wherein an upper half portion of the airbag case extends in a vehicle front direction in a shelf shape from a lower half portion.