JPH0651457B2 - Airbag device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an airbag device that protects an occupant in the event of a collision of a vehicle or the like, and more specifically, a gas generator fixed to a base plate, The present invention relates to an airbag device having a gas inlet through which gas from the gas generator flows and including an airbag main body fixed to the base plate.

[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 protective device, Japanese Patent Publication Sho 56
-43890 and Japanese Utility Model Laid-Open No. 61-185642.

As shown in FIG. 5, the gas generator 2 is fixed to the base plate 1 mounted on the fixed side such as the steering wheel, and the airbag main body 3 having the gas inlet 4 is fixed via the retainer 5 to meet the predetermined conditions. Under the circumstances, when the gas generator is operated, the gas instantaneously flows into the airbag main body 3 to instantly inflate the airbag main body 3. The main gas flow from the gas generator 2 (indicated by arrow a)
Is attached to the inside of the airbag body 3 to prevent the airbag body 3 from colliding with the front panel 3a of the airbag body 3 from the gas inlet 4 and inflating the airbag body 3 in one direction in the occupant side. The end 7 of this hanging belt 7
a is fixed to the base plate 1 together with the rear panel 3b of the airbag body 3 via a retainer 5.

[Problems to be Solved by the Invention]

However, when the end portion 7a of the hanging belt 7 is attached to the periphery of the gas inlet port 4 of the rear side panel 3b by sewing or the like, only the portion where the end portion 7a of the hanging belt 7 is present has a thickness near the gas inlet port 4. Is increased, and when the vicinity of the gas inlet 4 of the rear side panel 3b of the airbag body 3 is attached to the base plate 1 by the annular retainer 5, the rear side panel 3b
Cannot be attached to the base plate 1 uniformly and with good adhesion, and there is a risk of gas leakage, and the load applied to the suspension belt 7 when the gas generator is activated is directly applied to the rear side panel 3b. This is transmitted, and a partial load is applied to the rear side panel 3b by the suspension belt 7, which may damage the vicinity of the gas inlet 4 of the rear side panel 3b of the airbag body 3. Further, since the fixed state of the end portion 7a of the hanging belt 7 is inside the airbag body 3, it has a drawback that it cannot be confirmed from the outside.
It has to be covered with a separately formed cover member in a state of being folded and stored, which has a drawback that the number of parts increases and the assembling work becomes complicated.

An object of the present invention is to securely fix the gas inlet of the airbag body to the fixed side base plate with good sealing performance, and to eliminate the need for attaching a hanging belt to the inside of the airbag body as in the conventional case. (EN) Provided is an airbag device capable of restricting the amount of bulging of the airbag and securely holding the folded and stored state of the airbag body.

[Means for Solving the Problems]

The present invention has been made in view of the above-mentioned problems, and has an air bag body fixed to the base plate, which has a gas generator fixed to the base plate and a gas injection port into which gas from the gas generator flows. In an airbag device including: a shape regulating member is disposed outside the airbag body in a state where the airbag body is folded and stored, and the shape regulating member has a length that allows the airbag body to bulge. The belt includes a plurality of belts and a mounting member fixed to an end portion of the belt, the mounting member is fixed to the base plate, and the shape regulating member is provided in front of the airbag body when the airbag body is inflated. It is characterized in that it is designed to regulate the bulge to the.

[Operation] According to the present invention, the shape restricting member is disposed outside the airbag main body in a state where the airbag main body is folded and stored, and the shape restricting member has a length such that the airbag main body can expand. Since the belt has a plurality of belts and the plurality of belts are fixed to the base plate through the mounting metal fittings, a plurality of shape regulating members disposed outside the airbag body when the airbag body swells. The belt is set in a tensioned state, and the forward bulging of the airbag body is restricted according to the length of the belt.

〔Example〕

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

1 to 4 respectively show an embodiment of an airbag device according to the present invention. In the airbag device 11, the fixed side to which the base plate 13 is attached is the steering side or the instrument panel side. Is something that can be done.

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. The number of the 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 a substantially central portion of the base plate 13, a front end side of the gas generator 17 projects forward from the through hole 25, and a gas ejection port 17a of the gas generator 17 extends from the gas injection port 21 to the airbag body. It is inserted inside 19. The peripheral portion of the gas inlet 21 of the airbag body 19 is fixed to the base plate 13 via a ring-shaped retainer 31. As shown in FIG. 3, the retainer 31 is fixed to the base plate 13 by fixing means 33 such as rivets or screws.

A shape restricting member 35 is arranged outside the airbag body 19. The shape restricting member 35 is attached with the airbag body 19 folded. As shown in FIGS. 1 and 2, the shape restricting member 35 has a plurality of belts 37 having a length such that the airbag body 19 can bulge. In this embodiment, the two belts 37 are provided at the central portion. The belt 37 is formed by crossing, and mounting brackets 38 are fixed to both ends of the belt 37.
It is fixed to the side close to the outer peripheral edge of 3 by a fixing means 40 such as a bolt or a rivet.

A seat member 42 is fixed to the central portion of the belt 37. The seat member 42 is made of cloth or a soft synthetic resin material, and can regulate the front central portion of the airbag body 19. If a pad member is attached to the surface of the seat member 42, it is possible to reduce the impact force on the occupant when the airbag body 19 is inflated.

Since the belt 37 has an excessively long length in a state where the airbag body 19 is folded and accommodated, the belt body 19 is covered with the seat member 42 if appropriately wound or folded. 1
It is possible to hold 9 in a stored state. The belt 37 may be a member having a fixed length, for example, a cloth belt, or a stretchable rubber belt.

The above is the configuration of one embodiment of the airbag device according to the present invention. In such a configuration, when the gas generator 17 of the airbag device 11 is activated due to a collision or the like, the gas ejection port 17a is provided inside the airbag body 19. More gas is instantaneously supplied, and the airbag body 19 swells as shown in FIG.
Shape regulating member 3 arranged outside the airbag body 19
The plurality of belts 37 in FIG. 5 are tensioned so that the bulging of the airbag body 19 is restricted by the plurality of belts 37 and the sheet member 42. In particular, the mounting bracket 38 of the belt 37 is mounted on the side close to the outer peripheral edge of the base plate 13. Therefore, the bulging forward of the airbag body 19 can be effectively controlled. By providing the shape regulating member 35 having the belts 37 of different lengths on the same airbag body 19, it is possible to obtain airbag devices having different bulges.

〔The invention's effect〕

According to the present invention, the bulging amount of the airbag body can be adjusted by the shape regulating member provided on the outside of the airbag body, and the folded state of the airbag body can be reliably held by the shape regulating member. Therefore, it is possible to securely and firmly attach the airbag body, and it is possible to obtain an airbag device excellent in safety and economy.

[Brief description of drawings]

1 to 4 respectively show an outline of an embodiment of an airbag device according to the present invention. FIGS. 1 and 2 are a perspective view and a developed view of a shape regulating member, and FIG. 3 is a sectional view. FIG. 4 is a perspective view of the airbag body when it is inflated, and FIG. 5 is a cross-sectional view of a conventional airbag device. In the figure, 11 ... Airbag device, 13 ... Base plate, 17 ... Gas generator, 19 ... Airbag body, 2
1 ... Gas inlet, 31 ... Retainer, 35 ... Shape regulating member, 37 ... Belt, 38 ... Mounting bracket, 40 ...
Fixing means 42 ... Sheet member.

Claims (1)

[Claims] 1. An airbag apparatus comprising: a gas generator fixed to a base plate; and an airbag main body fixed to the base plate, the airbag main body having a gas inlet into which gas from the gas generator flows. A shape restricting member is disposed outside the airbag main body in a state where the airbag main body is folded and stored, and the shape restricting member includes a plurality of belts having a length such that the airbag main body can bulge, and A mounting member fixed to an end portion, the mounting member being fixed to the base plate, and the shape restricting member restricts forward bulging of the airbag main body when the airbag main body bulges. An airbag device characterized by being made.