JPS6328044Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an air bag device for an automobile, and more particularly to an air bag device for an automobile in which a reaction plate for storing an air bag is improved.

Conventionally, as shown in FIG. 1, an air bag ejecting opening 2 is formed in an instrument panel 1 facing a seated passenger, and the air bag ejecting opening 2
A box-shaped reaction plate 4 is disposed behind the airbag and stores the folded airbag 3 therein, and a box-shaped reaction plate 4 is disposed so as to close the airbag ejection opening 2 and when the airbag 3 is deployed. There is an air bag device for an automobile which has an air bag door 5 which can be pushed open by the air bag door 5 to allow the air bag 3 to be deployed in front of the occupant.

In the conventional automobile airbag device shown in FIG. 1, the lower end of the reaction plate 4 is tightened and fixed to the lower edge 5A of the airbag door 5 with bolts 6 and nuts 7, and the upper end is fixed to the lower edge 5A of the airbag door 5. Reinforcement 8
The lower end of the air bag door is tightened and fixed by a bolt 9 and a nut 10 at a position on the back side of the upper edge portion 5B of the air bag door.

Reference numeral 11 in the figure indicates a gas generator for generating high-pressure gas and thereby deploying the air bag 3 when an impact occurs.

This air bag device for automobiles generates high pressure gas from a gas generator 11 when an impact occurs.
When the air bag 3 is inflated by this,
The air bag door 5 is pushed from inside and deformed, and at this time, the upper edge 5B slips out from the back side of the upper end of the air bag ejection opening and is bent open around the lower edge 5A, thereby causing the air bag 3 to open. It is designed to pop out from the pop-out opening 2 and be deployed in front of the seated occupant.

At this time, the reaction plate 4 is subjected to a large force in the direction in which the space 12 formed by the air bag 3 and the reaction plate 4 is expanded due to the reaction force generated when the air bag 3 is inflated.

Therefore, when the reaction plate 4 is made of a thin plate, it is easily deformed by the reaction force, and in particular, the upper surface portion 4A of the reaction plate 4 is easily deformed by the reaction force.
The problem was that it was susceptible to this deformation.

In order to solve this problem, it is possible to increase the thickness of the reaction plate 4, especially the upper surface portion 4A and its vicinity, but this creates a new problem of increasing the weight and manufacturing cost. occurs.

This invention was devised in view of the above-mentioned conventional problems, and it is an object of the present invention to provide an air bag device for an automobile in which the rigidity of the reaction plate can be increased with a thin plate.

This idea consists of an airbag ejection opening formed in the instrument panel facing the seated occupant, and a box-shaped reaction plate placed behind the airbag ejection opening and storing the folded airbag inside. and an airbag door which is arranged to close the airbag ejection opening and which is pushed open when the airbag is deployed to enable the airbag to be deployed in front of the occupant. , an extension plate having a front end in the vehicle longitudinal direction and both ends in the vehicle width direction connected to the reaction plate is interposed between at least a part of the front edge of the reaction plate and the instrument panel; In this way, the above objectives are achieved.

Further, this invention achieves the above object in the air bag device for an automobile by connecting the reaction plate and the extension plate by attaching them to an instrument panel reinforcement.

Further, this invention achieves the above object in the airbag device for an automobile by making the extension plate have an uneven cross-sectional shape, thereby increasing the rigidity.

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the same or corresponding parts as those of the conventional automobile airbag device shown in FIG.

As shown in FIGS. 2 and 3, this embodiment includes an air bag ejecting opening 2 formed in an instrument panel 1 facing a seated passenger, and an air bag disposed behind the air bag ejecting opening 2. There is also a box-shaped reaction plate 14 that stores the folded air bag 3 inside, and is arranged to close the air bag ejection opening 2, and is pushed open by this when the air bag 3 is deployed. In an air bag device for an automobile having an air bag door 5 that allows the air bag 3 to be deployed in front of an occupant, the front edge portion 14 of the upper surface portion 14A of the reaction plate 14
An extension plate 13 is interposed between B and the instrument panel 1, and the front end in the vehicle longitudinal direction and both ends in the vehicle width direction are connected to the reaction plate 14.

As shown in FIG. 2, this extension plate 13 has corrugated projections and depressions 13A that are parallel to each other in the width direction of the reaction plate 14, thereby increasing the rigidity in the front-rear direction. ing. The rear end of the reaction plate 14 in the longitudinal direction of the vehicle body and the extension plate 1
As shown in FIG. 3, the connecting portion with the front end of No. 3 in the longitudinal direction of the vehicle body is overlapped with the bent portion 8A of the instrument panel reinforcement 8, and its rising portion is secured by a bolt 9 and a nut 10. 3
They are integrally tightened and connected.

Both ends of the extension plate 13 in the vehicle body width direction are connected to both side surfaces 1 of the reaction plate 14.
It is connected to the upper end of 4D.

Therefore, the length in the depth direction of the upper surface portion 14A of the reaction plate 14 in this embodiment is
The extension plate 13 can be made shorter than the upper surface portion 4A of the reaction plate 4 in the conventional automobile air bag device shown in the figure, and the rigidity of the upper surface portion 14A can be increased.

Furthermore, the upper surface 1 of this reaction plate 14
The extension plate 13 that replenishes the shortened part 4A is formed with wave-shaped unevenness 13A to increase its rigidity, and the extension plate 13 and the reaction plate 14
The connection part with the extension plate 1 is connected to the bent part 8A of the instrument panel reinforcement 8 at a position rearward from the instrument panel 1 compared to the conventional case.
Both ends in the vehicle width direction of 3 are reaction plates 1
4, the upper surface portion 14A of the reaction plate 14 as a whole
Therefore, the rigidity of the reaction plate 14 can be significantly increased without increasing the plate thickness.

In the above embodiment, the extension plate 13 has corrugated projections 1 parallel to each other in the width direction.
3A is formed, thereby increasing the bending rigidity in the front and rear direction, but this is due to the fact that other uneven shapes,
For example, it may be mesh or the like. Also, unevenness 1
If the rigidity is sufficient even without 3A, unevenness 13A
does not necessarily have to be formed.

Furthermore, in the embodiment described above, the extension plate 13 is arranged only at a position connected to the upper surface portion 14A of the reaction plate 14;
This may be interposed, for example, between the lower surface portion 14C of the reaction plate 14 and the air bag door 5. However, in this case, a mounting part such as the instrument panel reinforcement 8 is required to fix the connection part between the two.

Since the present invention is constructed as described above, it is possible to increase the rigidity of the reaction plate without increasing the plate thickness, and therefore, it has the excellent effect of preventing deformation of the reaction plate and reducing its weight. has.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing a conventional air bag device for an automobile, Fig. 2 is a perspective view showing an extension plate in an embodiment of the air bag device for an automobile according to the present invention, and Fig. 3 shows the same embodiment. FIG. 2 is a schematic cross-sectional view similar to FIG. 1; DESCRIPTION OF SYMBOLS 1...Instrument panel, 2...Air bag ejection opening, 3...Air bag, 5...Air bag door, 8...Instrument panel reinforcement, 11...Gas generator, 13
...Extension plate, 13A...Unevenness, 14...Reaction plate, 14A...
Upper surface portion, 14B...front edge portion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An air bag ejecting opening formed in the instrument panel facing a seated passenger, and a folded air bag located inside the air bag ejecting opening. an airbag door that is arranged to close the airbag ejection opening and is pushed open when the airbag is deployed, allowing the airbag to be deployed in front of the passenger; In the automotive airbag device, a front end in a vehicle longitudinal direction and both ends in a vehicle width direction are connected to the reaction plate between at least a portion of a front edge of the reaction plate and the instrument panel. An airbag device for an automobile, characterized in that an extension plate is interposed therebetween. (2) Utility model registration claim 1, characterized in that the reaction plate and the extension plate are connected by being attached to an instrument panel reinforcement.
An air bag device for an automobile as described in Section 1. (3) The airbag device for an automobile according to claim 1 or 2, wherein the extension plate has an uneven cross-sectional shape, thereby increasing rigidity.