JPH0769167A - Inflator installation structure for air bag device for assistant driver's seat - Google Patents

Abstract

PURPOSE:To prevent the abnormal noise due to the contact of an inflator with the inner periphery of the open port of a retainer and the leak of the gas jetted from the inflator by screwing the inflator with the retainer. CONSTITUTION:An inflator 48 is fixed with a retainer 42 by screwing a male screw 58 installed on the outer peripheral surface of the rear part of the inflator 48 onto the inner peripheral surface of an opened port 54. As for an air bag device 40, the inflator 48 is fixed exceedingly firmly for the retainer 42 by a screw, and the generation of abnormal noise due to the repetitive collision of the inflator 48 with the inner peripheral surface of an open port 52 is prevented. Further, since a flange is installed at the rear part of the inflator 48, and the flange makes contact with the edge part outer surface of the opened port 54, the gas leak from the opened port 54 is prevented exceedingly surely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inflator mounting structure for a passenger airbag device. Specifically, it relates to a structure in which a tubular inflator is fixed to a retainer.

[0002]

2. Description of the Related Art A conventional inflator mounting structure for a passenger airbag device will be described with reference to FIG.

The passenger seat airbag apparatus 10 is a retainer 12 in which an airbag 14 is folded and stored, and a front opening of the retainer 12 is covered with a lid 16. An inflator 18 is provided on the rear side of the retainer 12. Reference numeral 20 is a partition plate having an opening 20a for gas passage.

A first opening 2 is formed on one side surface of the retainer 12.
2 is provided, and the second opening 24 is provided on the other side surface. The shaft portion 26 at the tip of the inflator 18 is inserted into the first opening 22. The inflator 18 is fixed to the retainer 12 by tightening the nut 30 into the male screw engraved on the shaft portion 26. The inflator 18 has a configuration in which a gas generating agent is filled inside a tubular main body made of metal. Reference numeral 18a denotes a gas ejection hole of the inflator 18.

The rear end of the inflator 18 is loosely inserted in the second opening 24. Retainer 1 for inflator 18
When attaching the inflator 18 to the opening 24
And the shaft portion 26 is inserted into the first opening 22.

[0006]

In the above-mentioned conventional inflator mounting structure, since there is a gap between the inner peripheral surface of the second opening 24 and the rear end outer peripheral surface of the inflator 18,
There has been a problem that the rear end of the inflator 18 hits the inner peripheral surface of the second opening 24 and an abnormal noise is generated.

Further, in the above-described conventional inflator mounting structure for the passenger seat airbag device, a part of the gas ejected from the ejection hole 18a leaks from this gap, and accordingly, an inflator 18 having a large output is required. Had to be hired.

An object of the present invention is to prevent the inflator from coming into contact with the inner circumference of the retainer opening and generating abnormal noise.

Another object of the present invention is to prevent the gas ejected from the inflator from leaking from the opening for attaching the inflator of the retainer.

[0010]

SUMMARY OF THE INVENTION An inflator mounting structure for a passenger airbag device according to the present invention is a structure in which an inflator is mounted on a retainer for accommodating a passenger airbag, and the inflator is a gas generating device. An inflator mounting structure for an airbag device for a passenger seat, which has a hollow cylindrical main body containing an agent, has openings on both sides of the retainer, and the main body of the inflator is inserted into the opening. In, at least one female screw is provided on the inner peripheral surface of the opening, and an external screw that is screwed to the female screw is provided on the outer peripheral surface of the inflator main body, and the male screw is screwed to the female screw. The inflator is fixed to the retainer.

[0011]

According to the inflator mounting structure of the passenger airbag apparatus of the present invention, the inflator is fixed to the retainer extremely rigidly, so that the second inflator is used.
It is prevented that the inner peripheral surface of the opening is repeatedly hit, and the generation of abnormal noise is prevented.

Further, since the inner peripheral surface of the opening of the retainer and the outer peripheral surface of the inflator are in close contact with each other with a screw, gas leakage is prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing an inflator mounting structure of an air bag device for a passenger seat according to an embodiment, and FIG. 2 is an exploded perspective view showing the structure.

The passenger side airbag device 40 is formed by folding and storing an airbag 44 in a retainer 42, and a front opening of the retainer 42 is covered with a lid 46. An inflator 48 is provided on the rear side of the retainer 42. Reference numeral 50 is a partition plate having an opening 50a for gas passage.

In the present embodiment, the retainer 42 is composed of an upper retainer 42a and a lower retainer 42b.

A first opening 52 is provided on one side surface of the lower retainer 42b, and a second opening 54 is provided on the other side surface. The inner peripheral surface of the opening 54 is a female screw.

The tip of the inflator 48 has a first opening 52.
Has been inserted into. The inner diameter of the opening 52 is the inflator 48.
Is equal to or slightly smaller than the outer diameter of the tip of the inflator 48, and the outer peripheral surface of the tip of the inflator 48 is in airtight contact with the inner peripheral surface of the opening 52 over the entire circumference. The inflator 48 is fixed to the retainer 42 by screwing the male screw 58 provided on the outer peripheral surface of the rear portion of the inflator 48 into the inner peripheral surface of the opening 54. A flange 56 is provided on the rear portion of the inflator 48, and the flange 56 is in contact with the outer surface of the edge portion of the opening 54.

The inflator 48 has a structure in which a gas generating agent is filled inside a tubular body made of metal. 48a
Is a gas ejection hole.

The airbag device 40 includes a retainer 42.
On the other hand, since the inflator 48 is extremely firmly fixed by the screw, the inflator 48 does not repeatedly hit the inner peripheral surface of the opening 52 to generate abnormal noise. In particular, in this embodiment, the inflator 48 is always in contact with the inner peripheral surface of the opening 52, and even if the airbag device 40 vibrates, the contact sound between the inflator 48 and the opening 52 does not occur at all.

Further, in the airbag device 40, the male screw 58 is provided at the rear portion of the inflator 48, and the male screw is screwed into the female screw on the inner periphery of the opening 54.
Gas leakage from the opening 54 is prevented. Moreover, since a flange is provided at the rear portion of the inflator 48 and the flange is in contact with the outer surface of the edge portion of the opening 54, the gas leak from the opening 54 is prevented very reliably.

In the present invention, as shown in FIG. 3, the gasket 6 is provided between the flange 56 and the outer surface of the edge of the opening 54.
You may interpose 0. In this way, gas leakage from the opening 54 can be prevented more reliably.

In the present invention, as shown in FIG. 4, a bush 62 is provided between the inner peripheral surface of the opening 52 and the outer peripheral surface of the inflator 48.
May be interposed. In this way, gas leakage from the opening 52 is reliably prevented, and there is no direct contact between the inflator 48 and the inner peripheral surface of the opening 52, so that abnormal noise is more reliably prevented.

When the bush 62 is made of a heat softening material such as polypropylene, when the air bag apparatus encounters a fire, the bush softens due to the heat of the fire. Therefore, the inflator 4 ignited by the fire
The released gas of No. 8 flows out of the retainer 42 through between the inflator 48 and the inner peripheral surface of the opening 52 without inflating the airbag 44. As a result, it is possible to mitigate the increase in internal pressure when the airbag is deployed during a fire.

FIG. 5 is an overall sectional view of an airbag device 40A showing another embodiment of the present invention. In this embodiment, the opening 52A is a female screw hole, and the inflator 48A
A male screw 64 on the outer peripheral surface of the tip of the is screwed into the opening 52A. The other structure of FIG. 5 is the same as that of FIG.
The same parts are designated by the same reference numerals and the description thereof will be omitted.

Also in the airbag device 40A of FIG. 5, the inflator 48A is firmly fixed to the retainer, so that no abnormal noise is generated. Also, the openings 52A, 5
The inflator 48A is screwed into both of the openings 4 and 4, and gas leaks from these openings 52A and 54 are reliably prevented.

[0026]

As described above, according to the inflator mounting structure of the passenger airbag apparatus of the present invention, the generation of abnormal noise due to the contact between the inflator and the inner peripheral surface of the inflator mounting opening of the retainer is prevented.

Further, it is possible to prevent gas from leaking from this opening when the airbag device is operated. for that reason,
An inflator with a small output can be adopted.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an inflator mounting structure of an airbag device for a passenger seat according to an embodiment.

FIG. 2 is an exploded perspective view showing an inflator mounting structure of the passenger airbag device according to the embodiment.

FIG. 3 is a cross-sectional view of a main part of an inflator mounting structure of a passenger seat airbag device according to another embodiment.

FIG. 4 is a cross-sectional view of a main part of an inflator mounting structure of an airbag device for a passenger seat according to another embodiment.

FIG. 5 is a cross-sectional view showing an inflator mounting structure of a passenger seat airbag apparatus according to another embodiment.

FIG. 6 is a cross-sectional view showing an airbag device according to a conventional example.

[Explanation of symbols]

 10,40,40A Passenger airbag device 12,42 Retainer 14,44 Airbag 16,46 Lid 18,48 Inflator 22,52,52A First opening 24,54 Second opening 58 Male screw

Claims (1)

[Claims] 1. A structure in which an inflator is attached to a retainer for accommodating an airbag for a passenger seat, the inflator having a hollow cylindrical main body portion containing a gas generating agent. In an inflator mounting structure for an airbag device for a passenger seat in which openings are provided on both side surfaces and a main body of the inflator is inserted into the openings, at least one female screw is provided on an inner peripheral surface of the opening and the inflator is provided. An inflator for an airbag device for a passenger seat, characterized in that a male screw to be screwed into the female screw is provided on an outer peripheral surface of a main body portion, and the inflator is fixed to the retainer by screwing the male screw into the female screw. Mounting structure.