JP2526139B2 - Airbag device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an airbag device for protecting an occupant in the event of a collision of a vehicle or the like, and more specifically, an airbag body having a gas inlet, A gas generator connected to the gas injection port side, the gas generator fixed to a base plate fixed to the fixed side, and a peripheral edge of the gas injection port at a peripheral portion of a through hole formed in the base plate. The present invention relates to an airbag device in which a portion is attached via a retainer.

[Conventional technology]

BACKGROUND ART Conventionally, an airbag device has been known as a protection device for passengers of a vehicle or the like. As this airbag device, there is Japanese Patent Publication No. 56-43890, and as the holding structure of the airbag body, there are Japanese Utility Model Publication Nos. 54-69543 and 52.
-11923 and the like exist.

In such an airbag device, as shown in FIGS. 3 and 4, the gas generator 2 is fixed to the base plate 1 attached to the fixed side of the instrument panel, the steering wheel or the like, and the airbag having the gas inlet 4 is provided. When the bag body 3 is fixed by the bolt 6 and the nut 7 via the retainer 5 and is fixed between the retainer 5 and the base plate 1 by the blind rivet 8 and the gas generator operates under a predetermined condition. Gas instantaneously flows into the airbag main body 3 and the airbag main body 3 is instantly inflated.

[Problems to be Solved by the Invention]

However, when the airbag body 3 is inflated, that is, when the gas generator 2 is actuated, an impact force is applied to the mounting portion of the gas inlet port 4 of the airbag body 3, so that gas leakage or gas inlet 4
There was a risk of damage to the product. Therefore, various methods for strengthening the peripheral portion of the gas inlet 4 are adopted. For example, the mounting portion may be formed by stacking a plurality of cloths, or the thickness of the gas inlet 4 may be made thicker than other portions, or a wire may be inserted in the peripheral portion of the gas inlet 4. ing.

Such a conventional mounting structure of the airbag body 3 has a drawback that the number of parts such as cloth and wires cannot be reduced, resulting in an increase in cost, and the mounting work is complicated and the work efficiency is improved. It had a drawback that it could not.

An object of the present invention is to firmly attach an airbag main body without performing work such as laminating a plurality of fabrics, and to reduce the number of parts without fear of the airbag main body being dropped or damaged. It is intended to provide an airbag device which can improve work efficiency and is extremely economical.

[Means for solving the problem]

The present invention has been made in view of the problems described above, and includes an airbag body having a gas inlet, and a gas generator connected to the gas inlet side, and the gas generator is fixed to the fixed side. In the airbag device, which is fixed to the base plate, and the peripheral portion of the gas injection port is attached to the peripheral portion of the through hole formed in the base plate via a retainer, the retainer contacts the outer peripheral edge of the gas generator. A gas injection port of the airbag main body having an inner peripheral side wall capable of contacting, and at least one of abutting surfaces of the inner peripheral side wall of the retainer and an outer peripheral edge of the gas generator facing each other, is formed with an uneven portion. Is bent inward in a substantially L-shape, and the substantially L-shaped refraction portion is sandwiched between the concave and convex portions between the retainer and the gas generator.

[Action]

According to the present invention, the gas generator is connected to the gas inlet side of the airbag body, and the inner peripheral side wall and the gas generator of the retainer having the inner peripheral side wall capable of contacting the outer peripheral edge of the gas generator. An uneven portion is formed on at least one of the abutting surfaces facing the outer peripheral edge of the airbag, and is bent into a substantially L-shape inside the peripheral edge portion of the gas inlet of the airbag body through the uneven portion. Since the bent portion is sandwiched between the retainer and the gas generator, the peripheral portion of the gas injection port of the airbag body is firmly and surely sandwiched.

〔Example〕

Hereinafter, an airbag device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an outline of an embodiment of an airbag device according to the present invention. In an airbag device 11, a fixed side to which a base plate 13 is attached can be a steering side or an instrument panel side. Is.

The airbag device 11 includes a gas generator 17 fixed to a base plate 13 by fixing means 15 such as bolts and nuts, and an airbag body 19 having a gas inlet 21 into which gas from the gas generator 17 flows. ing. The number of gas generators 17 may be one, or a plurality of gas generators 17 may be provided in a pair on the left and right. When using a plurality of gas generators 17, a plurality of gas inlets 21 may be formed.

The airbag body 19 is formed by laminating a synthetic resin sheet on a cloth or the like.

A through hole 25 is formed in the substantially central portion of the base plate 13,
The front end side of the gas generator 17 projects forward from the through hole 25, and the gas ejection port 17a of the gas generator 17 is inserted into the airbag body 19 through the gas injection port 21. The peripheral portion of the gas inlet 21 is bent inward in a substantially L-shape, and the peripheral portion is fixed to the base plate 13 via a retainer 14.

The retainer 14 has an inner peripheral side wall 14a capable of contacting the outer peripheral edge 17b of the gas generator 17. In this embodiment, the retainer 14 having a U-shaped cross section is shown, but the outer peripheral side wall 14b.
It is also possible to use the retainer 14 that does not have the shape.
Further, the inner and outer side walls 14a of the retainer 14 and the outer peripheral edge 17b of the gas generator 17, the abutting surface facing each other, has a concavo-convex portion subjected to a surface treatment such as knurling in order to increase friction resistance.
20a and 20b are formed.

Incidentally, the uneven portions 20a, 20b are the inner peripheral side wall 14a of the retainer 14.
It may be formed on at least one of the contact surfaces of the gas generator 17 and the outer peripheral edge 17b of the gas generator 17 which face each other, and it is of course possible to form both surfaces. Further, the peripheral portion of the gas injection port 21 of the airbag body 19 can be fixed between the retainer 14 and the base plate 13 by the same blind rivet as shown in the related art.

〔The invention's effect〕

The above is the configuration of one embodiment of the airbag device according to the present invention. According to such a configuration, the peripheral edge portion of the gas inlet of the airbag body is the inner peripheral side wall of the retainer and the outer peripheral edge of the gas generator. Between the inner peripheral side wall of the retainer and the outer peripheral edge of the gas generator, the concave and convex portions are respectively formed on the opposing contact surfaces, and the peripheral edge portion of the gas injection port of the airbag body is substantially inward. Since it is refracted in an L-shape and the substantially L-shaped refraction portion is held by the uneven portion between the retainer and the gas generator,
The airbag body is fixed by a retainer, and the peripheral portion of the gas injection port of the airbag body is substantially L inside.
Since it is bent in the shape of a letter and the substantially L-shaped bent portion is held by the uneven portion between the retainer and the gas generator, it is held by the inner peripheral side wall of the retainer when the airbag body is inflated. Since the peripheral edge of the gas inlet of the airbag body is held in a direction orthogonal to the tensile force, it does not easily come off and has excellent sealing performance. It is possible to firmly fix the airbag main body without forming them by overlapping or inserting a wire in the peripheral portion of the gas injection port, and it is possible to reduce the number of parts and remarkably improve the assembly work efficiency. It is possible to obtain an airbag device that is extremely economical.

[Brief description of drawings]

FIG. 1 is a sectional view showing an outline of an embodiment of an airbag device according to the present invention, and FIGS. 2 and 3 are an exploded perspective view and a sectional view of a conventional airbag device. In the figure, 11 ... Airbag device, 13 ... Base plate, 14 ...
Retainer, 14a ... Inner side wall, 15 ... Fixing means, 17 ... Gas generator, 17a ... Gas ejection port, 17b ... Outer peripheral edge, 19 ... Airbag body, 20a, 20b ... Uneven portion, 21 ... Gas injection port, 25 … Through holes.

Claims (1)

(57) [Claims] 1. An airbag main body having a gas injection port, and a gas generator connected to the gas injection port side, the gas generator being fixed to a base plate fixed to the fixed side, and being attached to the base plate. In an airbag device in which a peripheral portion of the gas injection port is attached to a peripheral portion of the formed through hole via a retainer, the retainer has an inner peripheral side wall capable of contacting with an outer peripheral edge of the gas generator. An uneven portion is formed on at least one of abutting surfaces of the inner peripheral side wall of the retainer and the outer peripheral edge of the gas generator, and the peripheral edge portion of the gas injection port of the airbag body is substantially L-shaped inward. An airbag device characterized in that it is bent in a curved shape, and the substantially L-shaped bent portion is held by the uneven portion between the retainer and the gas generator.