JPH07329689A - Air bag device for vehicle - Google Patents

Abstract

PURPOSE:To provide the air bag device wide in an applicable range, which can cope with any restriction even if a developing space is narrow, or its incorporation is limited. CONSTITUTION:The air bag device is equipped with a first air bag 7 which is developed by air fed from an inflator, and with a second air bag 8 which is communicated with the end of the first air bag 7 through a bulkhead 9, and is developed together with the first air bag 7 with the bulkhead 9 released, the bulkhead 9 is of a rupture structure 11 which is released by the development of the first air bag 7, and the first and second air bags are so designed as to be different in the direction of their development.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air bag device which is mounted on a vehicle and protects an occupant in the event of a collision.

[0002]

2. Description of the Related Art A conventional vehicle air bag device is built in a steering wheel or an instrument panel, and an inflator generates gas by a detection output of a collision detection sensor.
There are many configurations that deploy a folded air bag. This type of vehicle is effective against a head-on collision because the airbag is deployed between the steering and instrument panel and the occupant, and the risk of the occupant colliding with the steering and instrument panel due to the collision can be avoided. . However, there are quite a lot of side collisions in vehicle collisions, and an air bag device that functions even for side collisions is necessary for safety reasons.

A conventional air bag device for a side collision is shown in FIG. That is, the air bag device having the above-described structure for a frontal collision is incorporated in the vehicle inner wall on the side of the seat. FIG. 14 shows an airbag 10
1 shows a deployed state, in which the airbag 101 which is deployed and inflated is interposed between the body side of the occupant sitting on the seat and the vehicle inner side wall, and fulfills a protection function for the occupant in a side collision. In the figure, 102 is an inflator, 102A is a collision sensor, 103 is a door inner panel, and 103A is a trim material.

In the air bag apparatus for side collision having the above-mentioned structure, in many vehicles, since the seat slides back and forth, it is necessary to cover the sliding range of the seat, so that the air bag 101 that greatly expands in the front and rear direction is required. However, it is difficult to install it in the door, and it is also not practical because it requires major changes to the door structure itself. These problems can be solved by incorporating an air bag device on the side of the sliding seat, but the actual application is very difficult. That is, as shown in FIG. 15, it is not possible to incorporate the seat surface side A or the front side portion B of the seat back 104 in the function of the seat itself (the function of seating a person). Even if the air bag device is installed in such a place by force, it will not function unless the seating method is specified in detail. In addition, assembling into the side portion C of the seat cushion 105 or the side portion D of the seat back 104 requires that the gap between the seat cushion 105 and the seat back is narrow, and the cushion pad of the seat cushion 105 or the seat back 104 must be sacrificed. As a result, the seating comfort is reduced, which is also difficult.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and its problem is that even if the expansion location is narrow or there is a restriction on the embedding target. It is to obtain a vehicle airbag device with a wide range of application that can overcome these problems, and to obtain a vehicle airbag device that is easy to incorporate into a seat and functions against a side collision. It is to improve.

[0006]

In order to achieve the above object, the invention according to claim 1 is characterized in that a first air bag which is inflated by air supply from an inflator and a partition wall is provided at an end of the first air bag. And the first partition is opened by opening the partition wall.
A second airbag that is deployed together with the airbag, and the partition wall has a fracture structure that is opened by the deployment of the first airbag, and the first airbag and the second airbag are A means characterized by different directions of deployment is adopted.

In order to achieve the above-mentioned object, the invention of claim 2 is the inflator and the first aspect of the means according to claim 1.
The airbag and the second airbag are accommodated in a seat inside the vehicle, the first airbag deploys laterally from the seat, and the second airbag extends along the inner side wall of the vehicle side of the seat. Adopt a means characterized by deploying.

In order to achieve the above object, the invention of claim 3 adopts a breaking structure in the means according to claim 1 or claim 2 which is a perforation structure with perforations or slits.

In order to achieve the above object, the invention of claim 4 employs a structure in which the breaking structure in the device according to claim 1 or 2 is a structure in which the partition wall itself bursts.

[0010]

According to the first aspect of the present invention, when air is fed from the inflator due to a collision, the first airbag first expands in a specific direction, the partition wall is broken, and the first airbag is provided with the second airbag. The airbag will deploy in another direction.

According to the second aspect of the present invention, when air is sent from the inflator due to a collision, the first airbag first expands laterally from the seat, the partition wall is broken, and together with the first airbag. The second airbag is deployed along the inner wall of the vehicle beside the seat.

In the means according to the third aspect, in addition to the action according to the first aspect or the second aspect, the breaking structure of the partition wall can be easily constructed and the breaking operation can be smoothly performed.

In the means according to the fourth aspect, in addition to the action according to the first or second aspect, the partition wall is ruptured by the burst, so that the rising speed of the expansion of the second airbag becomes faster.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, in the vehicle airbag apparatus of this embodiment, an inflator 2 that generates gas in response to a detection output of a collision detection sensor 1 and an airbag 3 that expands with the gas of the inflator 2 are housed in a case 4. It has a different structure. As shown in FIG. 2, the front side of the case 4 is opened, and a large-capacity first storage section 5 is provided adjacent to a small-capacity second storage section 6. Inflator 2 is second
It is provided at the deepest part of the storage section 6. As shown in FIGS. 3 and 4, the airbag 3 is composed of a first airbag 7 that expands in a duct shape and a second airbag 8 that expands in a cushion shape, and is shown in FIG. It is stored as shown.

One end of the first airbag 7 is fixed to the inner wall of the second storage portion 6 so that the gas generated by the inflator 2 can be introduced, and the first airbag 7 is stored in the second storage portion 6 in a folded state and is in front of the case 4. In, the case 4 is developed in a direction crossing the open portion. The second airbag 8 is the first airbag 7
Is continuously provided at the end portion on the opposite side of the attachment side and communicates with the first airbag 7 through the partition wall 9. The plane area of the second airbag 8 is the first to fulfill the main function of protecting an occupant from a collision.
3, which is sufficiently wider than the airbag 7, is bound in a folded state as shown in FIG. 3 by a binding tape 10 or the like that is easily broken, and is stored in the first storage portion 5. The deploying direction of the second airbag 8 forms an angle of approximately 90 degrees with the deploying direction of the first airbag 7. Therefore, the airbag 3 in a completely deployed state has an L shape as shown in FIG.

First airbag 7 and second airbag 8
The partition wall 9 provided at a location communicating with and has a rupture structure 11 by opening a hole that is opened by the internal pressure due to the expansion of the first airbag 7. The fracture structure 11 is formed by forming perforations 12 by perforations 12 as shown in FIG. 5, distributing small holes 13 throughout the partition 9 as shown in FIG. It is configured by providing a slit 14 of a book. Such a rupture structure 11 can be made easily because the partition wall 9 is made of the material of either the first airbag 7 or the second airbag 8 as it is and the rupture structure 11 is provided. It has the characteristic of being smooth.

As for the partition wall 9, as shown in FIG. 8, a locally fragile thin film 15 serving as a partition wall 9 for communicating with either the first airbag 7 or the second airbag 8.
May be configured. The fracture structure 11 of the partition 9 by the thin film 15 is a burst structure in which the partition 9 itself bursts.
According to this rupture structure 11, the burst of the partition wall 9 causes the first
Since the air bag 7 and the second air bag 8 communicate with each other, there is a characteristic that the rising of the second air bag 8 with respect to the deployment is quick.

The vehicle air bag device having the above-described structure can be incorporated in various places of the vehicle. FIG. 9 shows an application example in which the seat is installed inside the seat back 16 of the seat, and can protect the seat occupant against a side collision. That is, as shown in FIG. 10, a pad 18 and a spring 19 configured for the seat frame pipe 17 are provided.
Vehicle inner wall 21 in the backboard 20 behind the vehicle (this may be the inner wall of the door or the inner wall of the body structure)
The case 4 and the case 4 are fixed to the seat frame pipe 17 or the like with the open side of the case 4 facing the rear side. The open portion of the case 4 is closed by an opening / closing lid 22 that is attached to the backboard 20 and opens inwardly of the vehicle. The first airbag 7 deploys transversely from the back of the seat back 16 toward the inner wall 21, and the second airbag 8 laterally of the seat along the inner wall 21 toward the front. Try to expand.

That is, when the inflator 2 generates gas in response to the output signal of the collision detection sensor, the first airbag 7 starts to expand, opens the opening / closing lid 22 and jumps out of the case 4, as shown in FIG. As shown, the back of the seat back 16 is laterally deployed toward the inner wall 21. With the expansion of the first airbag 7, the rupture structure 11 of the partition wall 9 is ruptured by the internal pressure thereof, the first airbag 7 and the second airbag 8 communicate with each other, and the second airbag 8 binds with the binding tape 10.
And rupture and deploy at a stretch as shown in FIG. The deployed second airbag 8 is interposed between the body side of the occupant seated on the seat and the inner side wall 21 of the vehicle,
It will protect the occupants against side collisions.

In this way, the airbag 3 is deployed while changing the deployment direction in two steps, so that the airbag 3 can be made to function even in a narrow space or when the installation site and the deployment site of the air bag 3 are separated from each other. It is possible. For example, the first airbag 7 may be installed in the door structure beside the front seat of the vehicle, and the first airbag 7 may be deployed forward along the door structure, and the second airbag 8 may be deployed across the front of the seated person. If you do, the first
The air bag 7 is used to cushion the side impact element,
The second airbag 8 can also serve to cushion the frontal collision element, and the safety measures for the occupant against a collision are further improved in the vehicle.

Further, in the case of incorporating the seat, not only the seat back 16 but also the seat cushion 23 can be incorporated without impairing the original function of the seat, as in the case of incorporating the seat back 16 previously. That is,
As shown in FIG. 13, the seat cushion 23 may be mounted on one side of the lower side in the same manner as the seat cushion 16 is assembled. As a result, when the inflator 2 generates gas in response to the output signal of the collision detection sensor 1, the first airbag 7 starts to deploy, opens the opening / closing lid 22 and jumps out of the case 4, and then to the inner wall 21. The lower side of the seat cushion 23 is developed laterally. When the first airbag 7 is deployed, the partition wall 9 is broken and the first airbag 7 is broken.
And the second airbag 8 communicate with each other, and the second airbag 8
Breaks the binding tape 10 and expands at a stretch. The deployed second airbag 8 is interposed between the body side of the occupant seated on the seat and the inner side wall 21 of the vehicle, and protects the occupant against side collision.

[0022]

As is apparent from the above description of the embodiment, according to the invention of claim 1, the first inflator is used.
First, the airbag expands in a specific direction, the partition wall is ruptured, and the second airbag expands in a different direction together with the first airbag. Even if there are restrictions, it is possible to deploy the airbag in a form that overcomes these, and a vehicle airbag device with a wide range of application can be obtained.

According to the second aspect of the present invention, the first air bag is first expanded laterally from the seat by the inflator, the partition wall is broken, and the first air bag and the second air bag are formed on the side of the seat. Since the vehicle is deployed along the inner wall of the vehicle, it is possible to obtain the vehicle airbag device which is easily incorporated into the seat that functions against a side collision.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the breaking structure of the partition wall can be simply constructed, the breaking operation can be performed smoothly, and the function of the airbag device is improved. .

According to the invention of claim 4, in addition to the effect of the invention of claim 1 or claim 2, since the partition wall is ruptured by the burst, the second air bag is rapidly expanded and the air bag device is expanded. The function of is improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vehicle airbag device as an embodiment of the present invention.

FIG. 2 is a perspective view showing a case of a vehicle airbag device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing the airbag of the embodiment of the present invention in a semi-deployed state.

FIG. 4 is a perspective view showing an airbag of an embodiment of the present invention in a deployed state.

FIG. 5 is a perspective view showing an example of a broken structure of a partition wall of the vehicle airbag device of the embodiment of the present invention.

FIG. 6 is a perspective view showing another example of a broken structure of the partition wall of the vehicle airbag device according to the embodiment of the present invention.

FIG. 7 is a perspective view showing an example of a fractured structure of a partition wall of the vehicle airbag device according to the embodiment of the present invention.

FIG. 8 is a perspective view showing an example of a rupture structure of a partition wall of the vehicle airbag device according to the embodiment of the present invention.

FIG. 9 is a perspective view showing a seat to which the vehicle airbag device of the embodiment of the invention is applied.

10 is an enlarged cross-sectional view taken along the line AA in FIG.

11 is a semi-deployed state diagram of the airbag in FIG.

12 is a developed state view of the airbag in FIG.

FIG. 13 is a cross-sectional view showing an application example in which the vehicle airbag device of the embodiment of the present invention is incorporated into a seat cushion.

FIG. 14 is a sectional view showing a conventional airbag device in an expanded state.

FIG. 15 is an explanatory diagram showing application points when a conventional airbag device is applied to a seat.

[Explanation of symbols]

 1 Collision Detection Sensor 2 Inflator 7 First Airbag 8 Second Airbag 9 Partition 11 Break Structure 12 Perforations 15 Thin Film 16 Seat Back 21 Inner Side Wall 23 Seat Cushion

Claims (4)

[Claims] 1. A first airbag that is inflated by air supplied from an inflator and a first partition that communicates with an end of the first airbag via a partition wall, and is opened together with the first airbag by opening the partition wall. A second airbag, the partition wall has a fracture structure that is opened by the deployment of the first airbag, and the deployment directions of the first airbag and the second airbag are different. An airbag device for a vehicle characterized by the above. 2. The airbag device for a vehicle according to claim 1, wherein the inflator, the first airbag and the second airbag are housed in a seat inside the vehicle, and the first airbag is located from the seat side. An air bag device for a vehicle, wherein the second air bag is inflated toward one side, and the second air bag is inflated along an inner wall of the vehicle on the side of the seat. 3. The vehicle airbag apparatus according to claim 1 or 2, wherein the breaking structure is a perforated structure with perforations or slits. 4. The vehicle airbag device according to claim 1, wherein the breaking structure is a structure in which the partition wall itself bursts.