JPH0820304A - Air bag device for vehicle - Google Patents

Abstract

PURPOSE:To use a bag main body in common by reducing the height of a storage section to the utmost and merely changing the area of the exhaust control port of a gas generator having a different capacity. CONSTITUTION:At the time of the collision of a vehicle, a bag main body 11 normally stored in the folded state is inflated by the high-pressure gas fed by a gas generator 2, and the pressure applied when an occupant collides with the bag main body 11 is reduced by an exhaust control port formed on the bag main body 11, and the gas generator 2 is arranged in the exhaust control port 12 of the bag main body 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle airbag device.

[0002]

2. Description of the Related Art An example of a vehicle airbag device 1 is shown in FIGS. 7 and 8 (see Japanese Utility Model Laid-Open No. 2-38361).
As shown in FIG. 2, a gas generator 2 that ejects high-pressure gas by a signal from a collision sensor (not shown) at the time of collision of a vehicle.
And the instrument panel 3 which is normally folded
The bag body 5 housed in the opening 4 of the gas generator 2, the mounting member 6 for the gas generator 2 and the bag body 5, and all the high-pressure gas housed in the gas generator 2 and ejected from the gas generator 2. The reaction plate 7 made of a metal material that directs the bag 5 toward the main body 5, the guide plate 8 that guides the direction of the bag main body 5 when inflating, and the opening 4 of the instrument panel 3 through the instrument panel 3 And a lid 9 that opens the opening 4 by the bag body 5 that covers and expands smoothly, and the bag body 5 is inflated by the high-pressure gas from the gas generator 2 supplied into the bag body 5. By doing so, the upper half of the body of an occupant (not shown) can be held.

Exhaust control ports 10, 10 are formed on both sides of the expanded bag body 5, and the exhaust control ports 10, 1 are formed.
0 is for reducing the internal pressure of the bag body 5 when an occupant collides with the bag body 5, and the area of the exhaust control ports 10 and 10 varies depending on the performance of the gas generator 2.

[0004]

However, since the conventional vehicle airbag apparatus 1 requires the mounting member 6 between the gas generator 2 and the bag body 5,
A certain height is required for the storage portion of the vehicle airbag device 1.

Further, when a vehicle such as a large vehicle and a small vehicle such as an automobile has a volume difference in the internal space, and gas generators 2, 2 having different capacities are made to correspond to each other, respectively, It is necessary to prepare the bag main bodies 5, 5, ... With different areas of the exhaust control ports 10, 10, respectively, and each of the bag main bodies 5, 5 ,. become.

Therefore, the present invention has been made in view of the above points, and an object of the present invention is to provide a gas generator having a storage part whose height is as low as possible and which has a different capacity. An object of the present invention is to provide a vehicle airbag device which is a common bag body only by changing the area of the exhaust control port.

[0007]

In order to solve the above-mentioned problems, the invention of claim 1 is a high pressure for supplying a gas generator with a bag main body which is always folded in a folded state at the time of collision of a vehicle. In a vehicle airbag device configured to be inflated with gas and configured to reduce a pressure when an occupant collides with the back body by an exhaust control opening formed in the bag body, in an exhaust control opening of the bag body, It is characterized in that the gas generator is provided.

According to a second aspect of the present invention, there is provided the vehicle airbag apparatus according to the first aspect, wherein the exhaust control port has a constant opening diameter corresponding to a gas generator having a predetermined pressure and the gas generation. The opening diameter can be controlled according to the amount of gas supplied from the container.

According to a third aspect of the present invention, in the vehicle airbag apparatus according to the second aspect, the exhaust control port is sewn as means for controlling the opening diameter. .

A fourth aspect of the present invention is the vehicle airbag apparatus according to the second aspect, wherein the control means for controlling the opening diameter is such that the exhaust control port is provided by an engaging means. And

The invention of claim 5 is the invention of claims 1 to 4.
The vehicle airbag apparatus according to any one of the aspects, wherein the exhaust control port of the bag body is formed so as to be closed when gas is supplied from the gas generator.

[0012]

According to the invention of claim 1 of the above-mentioned means, when a vehicle collides with the vehicle, the gas is generated in the exhaust control port of the bag body which is normally stored in a folded state and is expanded by the high pressure gas supplied by the gas generator. Since the exhaust control port can also serve as an insertion space into the bag body, since no special mounting member is required, the height of the entire vehicle airbag device can be increased accordingly. Can be lowered.

According to the invention of claim 2, in addition to the operation of the invention of claim 1, since the exhaust control port has a constant opening diameter corresponding to a gas generator having a predetermined pressure, the bag body is shared. Can be realized, and the cost is reduced accordingly. Further, since the opening diameter of the exhaust control port can be controlled according to the amount of gas supplied from the gas generator, even if the vehicle interior space is wide or narrow, the internal pressure of the bag body sufficient to protect the occupant. Can be controlled.

According to the invention of claim 3, in addition to the effect of the invention of claim 2, since the opening diameter of the exhaust control port is controlled by sewing, the simplicity as means can be obtained.

According to the invention of claim 4, in addition to the function of the invention of claim 2, since the opening diameter of the exhaust control port is controlled by the engaging means, the simplicity of the means can be obtained.

According to the invention of claim 5, in addition to the operation of any one of claims 1 to 4, the exhaust control port of the bag body is connected to the gas generator when the gas is supplied from the gas generator. Exhaust is blocked by contacting and closing, and at the end of inflation and expansion of the bag body, it is opened by the internal pressure of the bag body to allow exhaust.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings.

1 to 4 show a vehicle airbag apparatus 1 according to an embodiment of the present invention. FIG. 1 is an exploded perspective view. FIG. 2 is a plan view of the bag body when inflated and deployed. FIG. 3 is a plan view of the bag body after the expansion and deployment are completed. FIG. 4 is a side view of the main part of the bag body.

In this embodiment, the vehicle airbag apparatus 1 has a collision sensor (not shown) at the time of collision of the vehicle.
The gas generator 2 that injects high-pressure gas according to the signal of the instrument panel 3 and the instrument panel 3 that is normally folded (see FIG. 7).
(See) the hollow bag main body 11 housed in the opening 4 (the same) and the exhaust control ports 12, 12 formed on the side of the bag main body 11 to be inserted into the bag main body 11. A reaction plate 7 made of a metal material that houses the gas generator 2 therein and directs all the high-pressure gas ejected from the gas generator 2 to the bag body 11, and the bag body 11 when inflated. A guide plate 8 (see FIG. 7) that guides the opening 4 and a lid 9 that opens the opening 4 by the bag body 11 when the opening 4 of the instrument panel 3 is covered with the instrument panel 3 in a smooth manner and is expanded. (See FIG. 7), the bag body 11 is inflated by the high-pressure gas from the gas generator 2 supplied into the bag body 11, so that an occupant (not shown) It may retain the upper body).

The exhaust control ports 12, 12 are formed on both sides of the bag body 11 which is inflated as described above, so that the pressure when the occupant collides with the bag body 11 is reduced. To reduce the internal pressure of the.

The area of the exhaust control ports 12, 12 has a constant opening diameter corresponding to the gas generator 2 having a predetermined pressure, and the opening diameter is controlled according to the amount of gas supplied from the gas generator 2. It can be controlled by means 13, 13.

The reaction plate 7 has stud bolts 14, 14, ...
The through-holes 15, 15, formed in the above are inserted, and the bag body 11 is fixedly attached to the reaction plate 7 by a nut (not shown).

As the opening diameter control means 13, 13, the exhaust control ports 12, 12 are sewn with a sewing thread 16 as shown in FIG.

Therefore, according to the present embodiment, inside the exhaust control ports 12 and 12 formed in the bag body 11 which is always stored in a folded state and inflates with the high pressure gas supplied from the gas generator 2 when a vehicle collides. In addition, since the gas generator 2 can be arranged as it is, not only the exhaust control ports 12 and 12 can also serve as an opening for insertion into the bag body 11, but no special mounting member is required. As a result, the height of the vehicle airbag device 1 as a whole can be reduced.

Further, since the exhaust control ports 12 and 12 have a predetermined opening diameter corresponding to the gas generator 2 having a predetermined pressure in advance, the bag body 11 can be used in common.
It will be cheaper.

Further, since the opening diameters of the exhaust control ports 12 and 12 can be controlled according to the amount of gas supplied from the gas generator 2, the occupant can protect the vehicle even if the indoor space of the vehicle is wide or narrow. A sufficient internal pressure of the bag body 11 can be controlled.

The control means 13 is a simple means because it controls so that the opening diameters of the exhaust control ports 12, 12 are slightly reduced by sewing using a thread 16.

When the gas is supplied from the gas generator 2,
As the bag body 11 expands, the side surfaces 2a, 2a of the gas generator 2 come into contact with the side surfaces 11a, 11a of the bag body 11 itself as shown in FIG. 12, 12 are closed and evacuation is blocked.

Therefore, even if the exhaust control ports 12 and 12 are opened, no trouble occurs in the expansion operation of the bag body 11.

After the bag body 11 is inflated and deployed, the bag body 1 is generated due to an occupant colliding with the bag body 1.
As shown in FIG. 3, due to the change in the internal pressure of No. 1, the side surfaces 2a, 2a of the gas generator 2 and the side surface 1 of the bag body 11 itself.
Gaps 17 and 17 are formed between 1a and 11a. Due to the gaps 17, 17, the exhaust control ports 12, 12 that are originally opened are in an open state, and the exhaust control ports 12,
Exhaust 18, 18 from 12 is enabled. Therefore, the internal pressure in the bag body 11 is reduced.

The embodiment shown in FIGS. 5 and 6 is another embodiment of the present invention, and the main difference from the above embodiment is the control means of the opening diameter of the exhaust control port.

That is, in the case of the embodiment shown in FIGS. 5 and 6, the means 19 for controlling the opening diameter of the exhaust control ports 12, 12 is provided.
As a result, the exhaust control ports 12 and 12 are engaged with each other.

As the means 19 for controlling the opening diameter of the exhaust control ports 12, 12, in the case of the embodiment shown in FIG. 5, a female engaging portion 20 is provided in advance in the exhaust control ports 12, 12, and A so-called fastener or chuck (trade name zipper Zipper) that controls the opening diameters of the exhaust control ports 12, 12 to be slightly reduced by the male engagement portion 21 that disengages by sliding with respect to the engagement portion 20. It is like, and can be easily adjusted.

In the case of the embodiment shown in FIG. 6, as the means 19 for controlling the opening diameter of the exhaust control ports 12 and 12, the exhaust control ports 12 and 12 are preliminarily provided with hooking portions 22 and 2, respectively.
The hooks 23, 23 provided with the hooks 23, 23 that engage and disengage with the latch portions 22, 22, control the opening diameters of the exhaust control ports 12, 12 to be slightly reduced. Therefore, simple adjustment is possible.

[0035]

As is apparent from the above, according to the first aspect of the present invention, when a vehicle collides, the exhaust control of the bag body which is normally stored in a folded state and is expanded by the high pressure gas supplied by the gas generator is controlled. Since the gas generator is arranged in the mouth, not only the exhaust control port can also serve as an insertion space into the bag body, but a special mounting member is not required, and the air for vehicles can be used accordingly. It is possible to reduce the height of the entire bag device.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the exhaust control port has a constant opening diameter corresponding to a gas generator having a predetermined pressure, the bag body is shared. Can be realized, and the cost is reduced accordingly. Further, since the opening diameter of the exhaust control port can be controlled according to the amount of gas supplied from the gas generator, even if the vehicle interior space is wide or narrow, the internal pressure of the bag body sufficient to protect the occupant. Can be controlled.

According to the invention of claim 3, in addition to the effect of the invention of claim 2, since the opening diameter of the exhaust control port is controlled by sewing, the simplicity of the means can be obtained.

According to the invention of claim 4, in addition to the effect of the invention of claim 2, since the opening diameter of the exhaust control port is controlled by the engaging means, the simplicity of the means can be obtained.

According to the invention of claim 5, in addition to the effect of any one of claims 1 to 4, the exhaust control port of the bag body is connected to the gas generator when the gas is supplied from the gas generator. Exhaust is blocked by contacting and closing, and after the inflation of the bag body is completed, it is opened by the internal pressure of the bag body to allow the exhaust.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts according to an embodiment of the present invention.

FIG. 2 is a plan view of the bag body of FIG. 1 when inflated.

3 is a plan view of a bag body in which a pressure is applied to the bag body of FIG. 2 to change an internal pressure.

4 is a side view for explaining an embodiment of the control means taken along the line A in FIG.

5 is a side view for explaining another embodiment of the control means according to the arrow A of FIG.

FIG. 6 is a side view for explaining still another embodiment of the control means according to the arrow A of FIG.

FIG. 7 is a cross-sectional explanatory view of a conventional vehicle airbag device.

8 is a perspective explanatory view of the expanded bag body of FIG. 7. FIG.

[Explanation of symbols]

 1 Airbag Device for Vehicle 2 Gas Generator 2a Side of Gas Generator 7 Reaction Plate 11 Bag Body 11a Side of Bag Body 12 Exhaust Control Port 13 Control Means 16 Sewing Thread 19 Control Means 20 Female Engagement Part 21 Male Engagement Part

Claims (5)

[Claims] 1. At the time of collision of a vehicle, a bag body, which is normally folded and stored, is inflated by high-pressure gas supplied by a gas generator, and an occupant is placed on the back body by an exhaust control opening formed in the bag body. A vehicle airbag apparatus configured to reduce a pressure when a collision occurs, wherein the gas generator is arranged in an exhaust control opening of the bag body. 2. The vehicle airbag device according to claim 1, wherein the exhaust control port has a constant opening diameter corresponding to a gas generator having a predetermined pressure, and gas from the gas generator is discharged. An air bag device for a vehicle, wherein an opening diameter can be controlled according to a supply amount. 3. The vehicle airbag apparatus according to claim 2, wherein the exhaust diameter control means is formed by sewing the exhaust control opening. . 4. The vehicle airbag apparatus according to claim 2, wherein the exhaust diameter control means is configured to perform the exhaust control opening by an engagement means. Bag device. 5. The vehicle airbag device according to claim 1, wherein the exhaust control port of the bag body is formed so as to close when gas is supplied from the gas generator. An air bag device for vehicles, which is characterized in that