JPH11129842A - Air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold an inflated and extended air bag so as to prevent its moving from a proper position between a fixed side member and an occupant, and well absorb energy of the occupant. SOLUTION: In an air bag device formed so as to inflated and extend an air bag 26 stored to be folded, in a part to be brought into contact with at least a fixed side member in the air bag 26, a strong friction means 36 for generating large frictional resistance relating to the fixed side member is provided, and when it is inflated and extended, the air bag 26 brought into contact with the fixed side member is prevented from moving by friction from a proper position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an airbag device mounted on a vehicle.

[0002]

2. Description of the Related Art Conventionally, an airbag device for a vehicle has been disclosed in FIG.
As shown in FIG. 1, there is a steering wheel mounted and used at a position inside a wheel rim portion 12 of the steering wheel 10. In such an airbag device, for example, when a large acceleration is applied in a direction in which the vehicle stops suddenly, the airbag 14 is inflated and deployed at a position between the steering wheel 10 and the occupant to absorb the kinetic energy of the occupant. I do.

[0003]

In the conventional airbag device mounted on the steering wheel 10 as described above, the occupant and the steering wheel 10 are connected to each other in accordance with the occupant's inertial movement along the traveling direction of the vehicle. During this time, a large airbag 14 is required to securely position the airbag 14 as shown by a two-dot chain line in FIG.

[0004] In view of the above, the present invention provides an air bag device in which an inflated and deployed air bag is provided between an occupant and a fixed-side member without particularly requiring a large-sized air bag, and which can favorably absorb energy. It is intended to provide new.

[0005]

An airbag device according to a first aspect of the present invention is an airbag device in which an airbag folded and stored is inflated and deployed, at least a fixed side member of the airbag. A strong friction means for generating a large frictional resistance to the fixed side member is provided at a portion in contact with the fixed side member.

With the above-described structure, when the airbag is inflated and deployed, the strong friction means of the airbag comes into contact with the stationary member, and the friction between the airbag and the stationary member is increased by a large frictional resistance acting therebetween. The airbag that is inflated and deployed does not require a specially large airbag because the airbag is kept in the proper position even if the occupant hits the airbag while moving inertia by preventing the positional displacement between the occupants. And between the fixed side member and the fixed side member, energy can be favorably absorbed.

According to a second aspect of the present invention, there is provided an airbag apparatus wherein an airbag which is folded and stored is inflated and deployed, wherein a portion of the airbag which abuts on a fixed side member is provided. It is characterized in that a material having a rough surface surface that causes a large frictional resistance to the fixed side member is provided, or rubber is integrally provided on the surface.

According to the above-described structure, in addition to the function and effect of the first aspect of the present invention, a material having a rough surface can generate a large frictional resistance with the stationary member. . Further, since the material can be manufactured simply by adding the material having the rough surface to the surface of the airbag bag, the processing can be facilitated.

The airbag device according to a third aspect of the present invention is the airbag device in which the folded and stored airbag is inflated and deployed, wherein the airbag device abuts on a fixed side member of the airbag, or The entire airbag is made of a material having a rough surface such that a large frictional resistance is generated on the stationary member.

With the above-described structure, in addition to the functions and effects of the first aspect of the present invention, it is possible to easily manufacture the same airbag simply by changing the material.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An airbag device according to an embodiment of the present invention is shown in FIGS. As shown in FIG. 1, it is a fixed side member in the steering device.
An airbag device 24 is mounted on a steering wheel 22 pivotally supported by the steering column 20.

The airbag device 24 is folded and housed by a gas generator mounted on the inside of the surface cover of the steering wheel 22, for example, a gas which is rapidly injected from an inflator or the like when a large acceleration is detected. The bag-shaped airbag 26 is configured to be inflated and deployed toward the occupant in the direction opposite to the steering column of the steering wheel 22.

As shown in FIG. 1 to FIG.
Is made of a high-strength flexible sheet material, for example, a high-strength cloth material. In the present embodiment, the wheel-corresponding surface portion 28 on the steering wheel side and the support receiving surface portion 3 facing the occupant side.
0 is sewn into a bag shape.

The wheel-corresponding surface portion 28 is formed in a substantially circular shape, and a circular opening portion 32 is provided at the center thereof for fixing the gas ejection nozzle portion of the inflator (not shown) around the periphery thereof. Has been drilled.

The outer surface of the wheel corresponding surface portion 28 is located between the opening 32 and the outer peripheral edge 34, is concentric with the center of the circular wheel corresponding surface portion 28, and is substantially the same as the steering wheel 22. A strong friction means 36 for increasing the frictional force between the airbag 26 and the steering wheel 22 is provided at a portion in contact with the steering wheel having an annular diameter.

The strong friction means 36 may have any structure as long as it can improve the frictional resistance to the steering wheel 22. For example, a cloth having a rough surface is formed in an annular shape, May be attached or stitched to the steering wheel contact portion.
For example, as shown in FIG. 4, a large number of small protrusion-shaped rubber members 36A and the like are dispersed and fixed to the annular steering wheel contact portion on the outer surface of the wheel corresponding surface portion 28, as shown in FIG. It may be constituted by doing.
Further, as shown in FIG. 5, the strong friction means 36 may be constituted by fixing a thin wire-shaped rubber material 36B or the like in a mesh shape to a portion of the wheel corresponding surface portion 28 in contact with the steering wheel. Further, the strong friction means 36 may be provided by attaching or stitching a tape made of cloth with a rough surface. Further, a rubber, for example, a compound such as a synthetic rubber, preferably an elastomer, a silicon-based coating material, a urethane-based coating material, or another material having a large friction is applied to a surface portion of the steering wheel contacting portion in the wheel corresponding surface portion 28. And, furthermore,
By roughening the surface roughness of the applied rubber or the like and integrating them, or by performing other processing, the frictional resistance when the surface of the steering wheel contact portion comes into contact with the steering wheel 22 is increased. May be increased.

Further, the strong friction means 36 is formed on the entire surface of the wheel corresponding surface portion 28, or the
May be configured over part or all of the above. In this case, the wheel corresponding surface portion 28 itself or both of the wheel corresponding surface portion 28 and the support receiving surface portion 30 may be made of a cloth or a sheet having a rough surface roughness.

The bearing surface 30 which forms the airbag 26 integrally with the wheel corresponding surface 28 is formed in a circular shape substantially the same shape as the wheel corresponding surface 28, and these outer peripheral edges 34 are mutually formed. And is sewn, and is formed in a bag shape having no opening except for the opening 32.

Also, as shown in FIG.
Inside, a shape control member such as a strap or a plurality of straps or a band cloth stretched from a location around the opening 32 on the inner surface of the wheel corresponding surface portion 28 to the inner surface of the corresponding support receiving surface portion 30. 38 are provided.

The shape control member 38 shown in FIG. 3 has a long band shape, one end of which is fixed to the periphery of the opening 32 on the inner surface of the wheel corresponding surface portion 28, and the intermediate portion thereof is formed on the inner surface of the support receiving surface portion 30. The opening 32 is fixed so as to extend in the diameter direction, and the other end is fixed around the opening 32 of the wheel corresponding surface portion 28.

Next, the operation and operation of the steering wheel support structure according to the present embodiment configured as described above will be described with reference to FIGS. 1, 2 and 3. FIG.

First, when a driver of the vehicle is driving and a large acceleration is applied so as to quickly stop the vehicle in progress, the airbag device 24 of the steering wheel 22 operates to activate the airbag 26. As shown in FIGS. 2 and 3, the sphere is inflated and deployed to a flattened shape by the action of the shape control member 38. In this state, if the driver moves in the direction of arrow B, for example, a load in the direction of arrow B in FIG. Then, the airbag 26 which has received the load in the direction of the arrow B comes into contact with the strong friction means 36 against the steering wheel 22 and a frictional resistance acts so as not to slide easily between them. As shown by a two-dot chain line 26 </ b> A in FIG. 1, a part of the airbag 26 is deformed so as to be bent over the steering wheel 22 and is located between the driver and the steering wheel 22, and comes off from the driver. Therefore, the airbag 26 has an effect of absorbing and absorbing energy such as inertial movement on the driver side on average and in a well-balanced manner.

Next, while the driver is driving, a large acceleration in a direction for stopping the vehicle is applied, and the driver moves in the direction of arrow A, for example, the airbag 26 of the steering wheel 22 is inflated and deployed. The head of the driver hits in the direction of arrow A. The load from the head is received by the steering wheel 22 via the airbag 26. At this time, the load imposed by the driver's head is received evenly and in a well-balanced manner while the airbag 26 remains intact, and the kinetic energy can be favorably absorbed. The airbag device of the present invention can be mounted in various places, and the strong friction means 36 can be configured in various structures corresponding to the installation place and the fixed side member. Further, the airbag device according to the present embodiment can be used for a steering device having a large column angle (a column stands almost upright) as used in a truck, a so-called one-box car, or the like. When the airbag inflates and deploys, the strong friction means of the airbag comes into contact with the steering wheel, and the large frictional resistance that acts during this period prevents the displacement between the airbag and the steering wheel, thereby allowing the occupant to move with inertia. Even if the airbag hits the airbag, the airbag is held at an appropriate position, and the inflated and deployed airbag is located between the occupant and the steering wheel, so that energy can be favorably absorbed.

[0024]

According to the airbag device of the present invention, the inflated and deployed airbag can be prevented from moving from an appropriate position between the fixed member and the occupant, so that the airbag is not particularly large. However, it has an excellent effect that the energy of the occupant can be favorably absorbed.

[Brief description of the drawings]

FIG. 1 is a side view showing an inflated and deployed state of an airbag according to an airbag device mounted on a steering wheel according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the airbag device according to the embodiment of the present invention, in which the airbag is taken out and the structure of the strong friction means is shown.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is an essential part perspective view showing another configuration of the strong friction means by taking out the airbag in the airbag device according to the embodiment of the present invention.

FIG. 5 is a perspective view of a main part of the airbag device according to the embodiment of the present invention, showing an airbag taken out and showing still another configuration of the strong friction means.

FIG. 6 is a schematic side view showing an operation state of an airbag device mounted on a conventional steering wheel.

[Explanation of symbols]

 REFERENCE SIGNS LIST 20 steering column 22 steering wheel (fixed side member) 24 airbag device 26 airbag 28 wheel corresponding surface portion 30 support surface portion 36 strong friction means

Claims (3)

[Claims] 1. An airbag device in which an airbag stored in a folded state is inflated and deployed, a large frictional resistance is generated at least in a portion of the airbag in contact with the fixed side member with respect to the fixed side member. An airbag device characterized by comprising a strong friction means for causing the airbag to perform. 2. An airbag device in which a folded and stored airbag is inflated and deployed, wherein:
An airbag device, wherein a material having a rough surface is provided to cause a large frictional resistance to the fixed side member, or rubber is integrally provided on the surface. 3. An airbag device in which an airbag stored in a folded state is inflated and deployed, wherein a portion of the airbag which abuts on a fixed side member or the entire airbag is larger than the fixed side member. An airbag device comprising a material having a rough surface to generate frictional resistance.