JPH05338511A - Air bag module - Google Patents

Abstract

PURPOSE:To provide an air bag module which is easy in assembly and capable of withstanding a high-pressure in gas inflation by an inflator without applying any special reinforcement on an air bag body itself. CONSTITUTION:In an air bag module, an inflator 2 is incorporated in an, air bag body 1, and the air bag body 1 is stored in air bag storing containers 3 and 6.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an air bag module.

[0002]

2. Description of the Related Art When a vehicle encounters an accident such as a collision,
An airbag device is known as a safety device for protecting an occupant. This air bag device expands the air bag bag incorporated in the steering wheel, instrument panel, etc. with the gas generated by the combustion of the gas generant when the vehicle suddenly stops or decelerates at the time of an accident. No cushion, which intervenes between the occupant and the vehicle structure to prevent secondary collision between them,
It is intended to protect passengers.

This air bag device is composed of a sensor for detecting a shock at the time of an accident, an inflator which is operated by the sensor to generate gas, an air bag bag which is inflated and inflated by the generated gas, and a container for accommodating them. The airbag module is formed by the airbag bag, the bag container, and the inflator.

Various types of conventional air bag modules have been adopted, but in any case, the air bag bag is fixed to the inflator or retainer with bolts or rivets. For example, in the conventional airbag module shown in FIG. 1, the ends of the airbag bag 1 are fixed to the inflator 2 and the retainer 3 with bolts or rivets 4, and in the conventional airbag module shown in FIG. One end of the inflator 1 is fixed to the retainer 3 with bolts or rivets 5, and the inflator 2 is housed inside the inflator 2.

[0005]

In the conventional air bag module illustrated in FIGS. 1 and 2, bolts or rivets are used to attach the air bag body. There is a problem that it is necessary to have a strong structure that can withstand the high pressure of the air bag module and it takes time to assemble the airbag module.

The present invention solves the problems of the conventionally known air bag module, is simple to assemble, and withstands high pressure when the air bag is inflated by the inflator without special reinforcement of the air bag body itself. It is an object of the present invention to provide an airbag module that can be used.

[0007]

An object of the present invention is to provide an inflator in an airbag bag body, and then to store the airbag bag body in an airbag bag container. Achieved by

High temperature gas is generated from the inflator. Therefore, when the inflator is built into the airbag bag as in the present invention, the portion of the airbag bag near the inflator may be damaged by the hot gas. Therefore, it is more preferable to dispose a heat insulating material between the inflator and the airbag bag. Further, the contact preventive member disclosed in Japanese Patent Laid-Open No. 51-27240, which is filed by the same applicant as the present applicant, may be arranged between the inflator and the airbag bag.

In the airbag module of the present invention, the inflator may be housed inside the bag through the opening provided in a part of the airbag bag, and then the opening may be closed. At that time, since the airbag bag (often a woven fabric) is joined (sewn or adhered, and a reinforcing cloth is used if necessary) between them, the joining process is easy and compared to the case where a conventional bolt or rivet is used. It is not necessary to give a special structure to the airbag bag itself. Therefore, the airbag module can be assembled very easily.

[0010]

The present invention will be described in detail below with reference to the accompanying drawings showing an example of an airbag module of the present invention. It will be clear, however, that the invention is not limited by the embodiments shown. FIG. 3 is a sectional view showing an embodiment of an airbag module according to the present invention, and FIG. 4 is a schematic sectional view illustrating a method of closing an airbag bag after incorporating an inflator therein.

As shown in FIG. 3, in the airbag module according to the present invention, the inflator 2 is housed in the airbag bag body 1, and the airbag bag body 1 is further housed in the airbag bag container. The airbag storage container is composed of a storage container body 6 and a retainer 3 which are fixed by combining them with bolts and nuts shown in FIG. In the embodiment shown in FIG. 3, in order to prevent the airbag bag body 1 from being damaged by the high temperature gas from the inflator 2, a heat insulating material 8 is arranged along the inflator as shown. As the heat insulating material 8, a sheet made of silicone rubber, fluororubber or the like, a heat resistant resin film, a cloth or mat made of heat resistant fibers can be used. Further, in order to prevent the inflator 2 from moving in the airbag bag 1, it is preferable to use a fixing pin 9 as shown in the figure.

In order to insert the inflator 2 into the airbag bag body 1, it is necessary to provide an opening portion in a part of the airbag bag body 1 (for example, the position shown by 10 in FIG. 3). To close the opening, as shown in FIG. 4A, the ends 1a and 1b of the slit-shaped opening of the airbag bag 1 may be sewn with, for example, a sewing thread 11. As shown in FIG. 4B, the airbag bag 1 is provided with a large opening, for example, a circular opening, and the inflator 2 is inserted into the airbag bag 1, and another closing cloth piece 12 is attached to the end of the circular opening of the airbag bag 1. The portion 1c may be sewn with the sewing thread 13. It is preferable to sew a plurality of rows, and a reinforcing cloth may be used if necessary. Instead of sewing or together with sewing, bonding using an adhesive may be performed.

[0013]

Since the air bag module according to the present invention has a structure in which the inflator is built in the air bag body, it is not necessary to fix the air bag assembly directly to the air bag storage container with bolts or rivets. Therefore, it is possible to provide an airbag module that can withstand the high pressure when the gas is inflated by the inflator without special reinforcement of the airbag bag itself. Further, with such a structure, the manufacture of the airbag bag can be simplified and the assembly of the airbag module can be simplified.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of a conventional airbag module.

FIG. 2 is a schematic sectional view showing another example of a conventional airbag module.

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

FIG. 4 is a diagram showing a method of closing the airbag bag after incorporating the inflator, wherein FIG. 4 (A) shows the case without using the closing cloth piece, and FIG. 4 (B) shows the closing cloth piece. The case of using is shown respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Airbag bag 2 ... Inflator 3 ... Retainer 6 ... Storage container main body 8 ... Insulating material 9 ... Fixing pin 11, 13 ... Sewing thread 12 ... Closing cloth piece

Claims (1)

[Claims] 1. An airbag module including an airbag bag, a bag container for storing the airbag bag, and an inflator for ejecting gas in a collision, wherein the airbag bag has an inflator inside. The airbag module is characterized by being stored in the bag storage container after being completed.