JPH08230595A - Air bag device with covering member - Google Patents

Abstract

PURPOSE: To intentionally control the developing operation of an air bag by providing a coating member coating a portion of the housed air bag in a case opening and fixing this so that a coated portion develops ahead of a coating section during developing of the air bag. CONSTITUTION: An inflater 4 and an air bag 1 are housed in a case 3 and a coating member 2 for coating a portion of the housed air bag 1 is provided in the opening of the case 3. When an impact is detected during clashing of a vehicle, a gas is jetted out of the inflater 4, an inner pressure is generated by filling the inside of the air bag 1 with this gas and by means of this inner pressure the air bag 1 develops from the opening of the case 3. The air bag 1 is fixed so that the coated section thereof develops ahead of the coating member 2. Thus, the developing movement of the air bag 1 is intentionally controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bag system for a vehicle, and more particularly to control of an air bag deployment direction.

[0002]

2. Description of the Related Art An airbag device is a device for protecting an occupant by inflating an airbag instantaneously as an assist of a seat belt when a predetermined impact is detected by a collision of a vehicle, and an inflator which is usually a gas generator. , An airbag that is inflated by the gas of the inflator is provided.
In this airbag device, the gas ejected from the inflator fills the inside of the airbag to generate an internal pressure, and the airbag is deployed by this internal pressure. Therefore, a method of controlling the deployment direction of the airbag has been considered in order to obtain a predetermined deployment shape. For example, JP-A-6-48262
According to the publication, an airbag device is disclosed in which the airbag is entirely or partially covered with a tough, plastically deformable foil, and when the airbag is deployed, the foil is excessively stretched and cleaves.

[0003]

However, in order to obtain a foil having stable plastic characteristics, great physical property examination and high quality control are required.

[0004]

The airbag device having the covering member of the present invention was invented in view of these circumstances. That is, in the airbag device, a covering member that covers a part of the stored airbag is provided in the case opening, and the covering member has a small elongation and sufficient strength against the internal pressure at the initial stage of the airbag deployment. When the airbag is deployed, the uncovered portion of the stored airbag is fixed so as to be deployed before the covered portion.

[0005]

According to the present invention, since the covering member is fixed to a part of the case as in the above-mentioned constitution, the uncovered portion of the accommodated airbag is expanded first when the airbag is expanded, and the airbag is expanded. You can intentionally control the behavior of the expansion of.

It is also possible to insert the covering member between the folded portions of the airbag to cover it and fix it to control the behavior of the expansion of the airbag.

[0007]

Embodiments will be described below with reference to the drawings. FIG. 1 is a perspective view of an airbag device used in the present invention. An airbag 1 and an inflator 4 are housed inside a case 3, and a covering member 2 is fixed to a part of an opening of the case 3 by a rivet 5 as shown in the figure.

FIG. 2 is a sectional view taken along the line AA in FIG. 1 of the airbag device used in the present invention. The storage state of each said component is shown.

FIG. 3 is a perspective view of another embodiment of the airbag device used in the present invention. The airbag 1 and the inflator 4 are housed inside the case 3, the covering member 2 is inserted between the folded airbags as shown in the figure, and the rivet 5 is used to cover a part of the opening of the case 3. It is fixed.

FIG. 4 is a sectional view of the airbag device used in the present invention taken along the line BB in FIG. The storage state of each said component is shown.

FIG. 5 is a perspective view of the airbag device used in the present invention, showing a broken state of the covering member 2 after the airbag is deployed.

[0012]

As described above, the airbag having the covering member of the present invention can control the deployment behavior of the airbag with a simple structure in which the covering member is fixed to a part of the opening of the case.

[Brief description of drawings]

FIG. 1 is a perspective view of an airbag device according to an embodiment of the present invention.

FIG. 2A of FIG. 1 of an airbag device according to an embodiment of the present invention.
It is -A sectional drawing.

FIG. 3 is a perspective view of another embodiment of the airbag device according to the embodiment of the present invention.

FIG. 4B of FIG. 3 of the airbag device according to the embodiment of the present invention.
It is a -B sectional view.

FIG. 5 is a perspective view of the airbag device according to the embodiment of the present invention after the airbag is deployed.

[Explanation of symbols]

 (1) Airbag (2) Covering member (3) Case (4) Inflator (5) Rivet

Claims (3)

[Claims] 1. An inflator and an air bag are housed in a case having an opening, and when an impact is detected during a vehicle collision,
Gas is ejected from the inflator, the gas fills the inside of the airbag to generate internal pressure, and the internal pressure deploys the airbag from the opening of the case, thereby restraining the occupant as an auxiliary device of the seat belt. In, the covering member that covers a part of the stored airbag is provided in the case opening, and the covering member has a small elongation and sufficient strength with respect to the internal pressure at the initial stage of airbag deployment,
An airbag device having a covering member, wherein an uncovered portion is fixed so as to be deployed before the covered portion when the airbag is deployed. 2. The airbag apparatus having a covering member according to claim 1, wherein the covering member is inserted between the folds of the airbag accommodated in a folded shape. 3. The airbag device having the covering member according to claim 1, wherein the covering member is pressed and deformed or broken by the airbag when the airbag is deployed.