JPH06293244A - Air bag device for front passenger seat - Google Patents

Abstract

PURPOSE:To sufficiently absorb a shock applied from the above against a container. CONSTITUTION:An upper surface part 82 of a container 52 is formed into a separate unit from the other part of the container 52, and a lug part 84 protrusively provided from the upper surface part 82 is welded to a container side surface part 52S. A lug part 90 protrusively provided from the side surface part 52S is welded to the upper surface part 82. Thus when applied a shock from the above against the container 52, deformation is easily started from the container side surface part 52S, and a large amount of impact energy is absorbed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device for a passenger seat, which is provided on an instrument panel of a vehicle and which deploys the airbag in the event of a vehicle collision to protect an occupant in the passenger seat.

[0002]

2. Description of the Related Art In a passenger airbag apparatus of this type, a folded airbag and an inflator are attached to a container, and a module cover is attached to cover the airbag. When a vehicle collides, the inflator operates and the airbag deploys. Pushed by this expanding airbag, the module cover opens to the inside of the room, and the airbag expands toward the inside of the room,
Crew protection is provided.

FIGS. 5 to 7 show a conventional airbag apparatus of the type in which a lid mount bracket is provided on a container and the lid is attached to the lid mount bracket. FIG. 5 shows the airbag deployment. FIG. 6 is a schematic perspective view showing the entire structure before, FIG. 6 is a perspective view of a container, and FIG. 7 is a sectional view taken along the line VII-VII of FIG.

In this airbag device 10, a lid 14 is attached to the front surface of a box-shaped container 12 whose front surface is an opening. Inflator 1 in the container 12
6 is fixed. Airbag 18 in the container 12
Is inserted in a folded state and is fixed by a bolt 19.

An upper surface 12a and a lower surface 12 of the container 12
A large number of intake holes 20 are formed in each b. When the inflator 16 is actuated and gas is ejected into the container 12 to inflate the airbag 18, the atmosphere passes through the air intake holes 20 and flows into the container 12 to rapidly inflate the airbag 10. Is configured as follows.

The lid 14 includes a backup plate 22 made of aluminum alloy or the like, and the plate 2
2 and a soft cover 24 provided on the front surface.
The upper edge portion of the plate 22 serves as a lid mounting portion 26 that extends above the container 12.

A lid mount bracket 28 is fixed to the upper surface of the container 12 by spot welding or the like. This lid mount bracket 28 is for the container 1
2 extends along the upper surface portion of the lid mounting portion 26.
Are fixed to the lid mount bracket 28 with bolts 34 and nuts.

The container upper surface 12a is a plate-shaped member which is separate from the other parts of the container 12. As shown in FIGS. 6 and 7, the ear 3 which is a projecting piece from the upper side of the container side surface 12S.
0 is projected on the upper side of the container upper surface 12a, the container upper surface 12a is applied to the ear portion 30 from the lower side, and is fixed by spot welding.

The inflator 16 is held in the container 12 by an inflator cover 38. The inflator cover 38 is fixed to the container 12 with bolts 40.

By the way, on the instrument panel,
In order to be able to absorb the impact when the occupant collides, the regulations stipulate the characteristic of being depressed and deformed when an impact is applied (instrument panel impact regulation). The passenger airbag device also needs to pass this instrument panel impact regulation. Therefore, conventionally, the container of the passenger airbag device is configured to be deformed and absorb the impact energy when a large impact is applied.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air bag device for a passenger seat in which the absorption amount of the instrument panel impact is increased.

[0012]

The airbag device for a passenger seat according to the present invention is provided with a box-shaped container having an open front surface, an airbag folded and stored in the container, and attached to the container. In an airbag device for a passenger seat including an inflator and a lid covering the front surface of the container, an upper surface portion of the container is a plate separate from the other parts, and is composed of this plate. It is characterized in that an ear portion is provided so as to project from each of the side edge of the container upper surface portion and the side edge portion of the side surface portion, and these ear portions are mutually connected to the other party.

[0013]

In the passenger airbag device of the present invention,
Since the joint between the upper surface and the side surface of the container has high rigidity, when an impact is applied from above, the side surface portion of the container is deformed more than before, and the impact energy that can be absorbed by the entire container increases.

[0014]

EXAMPLES Examples will be described below with reference to the drawings.

FIGS. 1 to 4 show an airbag device 50 according to an embodiment. FIG. 1 is a perspective view showing the entire structure, FIG. 2 is an exploded perspective view, and FIG. 3 is a container. FIG. 4 is a sectional view taken along line AA and line BB in FIG.

A lid 54 is attached to the front surface of a box-shaped container 52 having an opening on the front surface. An inflator 56 is fixed to the container 52. An airbag 58 is inserted into the container 52 in a folded state and is fixed with bolts 59.

A large number of intake holes 60 are formed in the upper surface portion, the side surface portion and the lower surface portion of the container 52. When the inflator 56 is actuated and gas is ejected into the container 52 and the airbag 58 is deployed, the atmosphere passes through the intake holes 60 and flows into the container 52 to rapidly deploy the airbag 58.

The lid 54 includes a backup plate 62 made of aluminum alloy or the like, and the plate 6
2 and a soft cover 64 provided on the front surface.
The upper edge portion of the plate 62 serves as a lid mounting portion 66 that extends above the container 52.

A lid mount bracket 68 is installed along the upper surface of the container 52. Both ends in the longitudinal direction of the lid mount bracket 68 are bent into an L shape along the side surface of the container 52 and fixed by spot welding.

The lid mount bracket 68 extends along the upper surface of the container 52 and has a large number of bolt holes 70 formed therein. A large number of bolt holes 72 are also formed in the lid mounting portion 66, and the lid mounting portion 66 is fixed to the lid mount bracket 68 with bolts 74 and nuts.

As shown in FIG. 2, the rear rear surface of the container 52 is composed of first and second back plates 78a and 78b. These back plates 78a and 78b are bent to receive the inflator 56. Also,
The inflator 5 is attached to the first back plate 78a.
A slit 76 for introducing the jet gas of No. 6 into the container 52 is opened.

The first and second back plates 78a, 7
8b is a folded piece 52 of the container 52 by a bolt 80.
It is fixed to a and 52b.

In this container 52, a bottom surface portion, both side surface portions 52S, and a folded piece 52a are formed into a substantially U shape by punching out a single metal plate and then bending it. The upper surface portion 82 is formed by punching a single metal plate and then bending it. This upper surface portion 82 is provided with protruding piece-shaped ears 84, 86, 88 on its side portions so as to overlap with the outer surface of the upper edge of the side surface portion 52S, and these ears 84, 86, 88 are provided. Are fixed to the side surface portion 52S by spot welding. The w in FIGS. 1 and 3 indicates the spot welding spot.

From the upper edge of the side surface portion 52S of the container 52, a protruding piece-shaped ear portion 90 is provided so as to enter the lower side of the upper surface portion 82. The ear portion 90 and the container upper surface portion 90 are fixed by spot welding.

Reference numeral 92 designates the lower end of the lid 54 and the container 52.
And a connecting member. This connecting member 92 is
Ruptures when opening, allowing the lower end of the lid 54 to open.

In the passenger airbag apparatus thus constructed, the side surface portion 51S and the upper surface portion 82 of the container 52 are provided so as to project from each other and the ears 84, 86, 88,
90 overlaps with the other side and is connected by spot welding. Moreover, the ear portion 90 is fixed to the lower surface of the upper surface portion 82. Therefore, when an impact is applied from above the container 52, the impact force is efficiently transmitted to the side surface portion 52S of the container 52, and the side surface portion 52S relatively easily starts buckling deformation. As a result, the overall deformation (crushing deformation) of the container 52 including the side surface portion 52S rapidly progresses, and the applied impact is sufficiently absorbed.

[0027]

As described above, in the passenger seat airbag apparatus of the present invention, when a large impact of a predetermined amount or more is applied to the container from the inside of the vehicle, the side surface portion of the container is rapidly deformed and impacted. Can be absorbed efficiently.

[Brief description of drawings]

FIG. 1 is a perspective view of a passenger seat airbag apparatus according to an embodiment.

FIG. 2 is an exploded perspective view of the device according to the embodiment.

FIG. 3 is a perspective view of an essential part of the embodiment apparatus.

4 is a cross-sectional view taken along line AA and line BB of FIG.

FIG. 5 is a perspective view of a passenger seat airbag apparatus according to a conventional example.

FIG. 6 is a perspective view of a container of a passenger seat airbag device according to a conventional example.

7 is a sectional view taken along the line VII-VII of FIG.

[Explanation of symbols]

 10,50 Airbag device for passenger seat 12,52 Container 14,54 Lid 16,56 Inflator 18,58 Airbag 22,62 Backup plate 28,68 Lid mount bracket 82 Container upper surface 84,86,88,90 Ear

Claims (1)

[Claims] 1. A box-shaped container having an open front surface, an airbag folded and stored in the container, an inflator attached to the container, and a lid covering the front surface of the container. In the passenger seat airbag device, the upper surface of the container is formed of a plate separate from the other parts, and the side of the container upper surface and the side of the side surface of the container are respectively formed. An airbag device for a passenger seat, characterized in that an ear portion is provided so as to project therefrom, and the ear portion is mutually connected to the other party.