JPH0597010A - Air bag device - Google Patents

Abstract

PURPOSE:To install a lid of an air bag device to an instrument panel upon certain location and prevent dislocating by forming an outward facing flange at the top of an air bag accommodator, and detaining the flange with the instrument panel. CONSTITUTION:An outward facing flange 35 is formed at the top of an air bag accommodator 12. Protruding downward, a plurality of tabs 37 are formed on the rear of a lid 17 of air bag device, and these tabs 37 are inserted in respective long grooves 39 provided in the flange 35 and fastened by rivet 41 to the upper part of the air bag accommodator 12. Aa plurality of projections 43 protruding downward are formed at the foremost of the flange 35, and detaining grooves 45 are provided at the step part 23 of an instrument panel 21 confronting these projections 43, which are inserted in the detaining grooves 45 to hold the detained state.

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 protecting an occupant in the event of a collision of a vehicle or the like. More specifically, a gas generator housed in an airbag container opened at the top, An airbag main body fixed to the airbag storage body so that gas from the gas generator may flow in when the gas generator is operated, and an upper opening of the airbag storage body with the airbag main body folded and stored. The present invention relates to an airbag device having a lid attached to a section.

[0002]

2. Description of the Related Art Conventionally, an air bag device has been known as a device for protecting an occupant such as a vehicle. As this air bag device, Japanese Utility Model Laid-Open No. 2-38360, Japanese Patent Publication No. 56-
There are Japanese Patent No. 43890, Japanese Utility Model Laid-Open No. 61-185642, and the like. As shown in FIGS. 3 and 4, the airbag device 1 attached to the instrument panel 2 side has an airbag storage body 5 fixed to a support arm 4 provided on the steering member 3. A gas generator 6 is housed in the air bag housing 5, and an air bag body 7 is fixed to the air bag housing 5 so that gas from the gas generator 6 may flow in when the gas generator 6 operates. There is. A lid 8 is attached to the upper open portion 5a of the airbag housing 5, and the tongue piece 8a is formed on the back surface of the lid 8 so as to project downward.
Is fixed to the upper end portion of the airbag storage body 5 with a screw 9. Further, the outer peripheral edge of the lid 8 comes into contact with the step portion 2a formed on the instrument panel 2.
The lid 8 is formed of a core material 8b and a synthetic resin material 8c such as urethane integrally molded with the core material 8b.

[0003]

However, in the conventional airbag device, the instrument panel 2 is used.
It is difficult to reliably position the lid body 8 on the stepped portion 2a, and there is a risk that a deviation in the thickness direction or a partial difference in the spacing in the surface direction may occur due to variations in component dimensions.
Further, the outer peripheral edge of the lid body 8 has a core material 8b, but the rigidity is low and the strength is weak, and the lid body 8 may be damaged except when the gas generator 6 is operating. Further, since the lower surface of the lid 8 is in contact with the step portion 2a of the instrument panel 2, there is a risk that both members rub against each other due to the vibration of the vehicle and generate a rubbing noise. It had a drawback that a soundproof material such as a non-woven fabric had to be attached.

An object of the present invention is to be able to reliably position and attach the lid of the airbag device to the instrument panel, prevent displacement, and improve the rigidity and strength of the lid. It is possible to provide an airbag device that does not generate a rubbing noise on the contact surface between the instrument panel and the lid.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an airbag device according to claim 1 is a gas generator housed in an airbag container opened at the top. An airbag main body fixed to the airbag storage so that gas from the gas generator flows in when the gas generator operates, and an upper portion of the airbag storage with the airbag main body folded and stored In an airbag device having a lid attached to an open portion, an outward flange portion is formed at an upper end portion of the airbag container,
The outward flange portion is locked to the instrument panel.

The airbag device according to claim 2 is
A protrusion protruding downward is formed at a tip of an outward flange portion of an upper end portion of the airbag storage body, and an engagement groove with which the protrusion is engaged is formed in the instrument panel.

[0007]

According to the airbag device of the first aspect of the present invention, since the outward flange portion is formed at the upper end portion of the airbag container, and the outward flange portion is locked to the instrument panel. , The instrument panel and the airbag storage body are securely assembled, and the lid and the instrument panel attached to the upper open part of the airbag storage body are securely positioned to prevent misalignment. Also, even if a load is applied to the upper portion of the lid, the load is transmitted to the outward flange portion of the airbag container, the lid is not damaged, and the rigidity and strength of the lid can be improved. ..

Further, according to the second aspect of the present invention, the downwardly projecting projection is formed at the tip of the outward flange portion of the airbag housing, and the projection is engaged with the instrument panel. Since the engaging groove is formed, the instrument panel and the air bag storage body can be assembled more reliably, the position shift can be prevented, and the contact surface between the instrument panel and the lid body can be rubbed. There is no fear of producing sound.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An airbag device according to the present invention will be described in detail below with reference to the drawings. 1 and 2 respectively show an outline of an embodiment of an airbag device according to the present invention. An airbag device 11 is an airbag container 12 whose upper part is opened.
And a gas generator 13 and an air bag body 15 housed in the air bag housing 12, and with the air bag body 15 housed, a lid 17 is provided on the upper open portion 12a of the air bag housing 12. Mounted and formed.

The airbag storage body 12 is fixed to a support arm or the like provided on a steering member of a vehicle or the like, and an outer peripheral edge of the lid body 17 is a step portion of a peripheral edge portion of a mounting hole 22 formed in the instrument panel 21. Stored in 23,
The airbag container 12 is arranged such that the surface of the instrument panel 21 and the surface of the lid 17 are substantially flush with each other. The airbag container 12 is formed in an elongated box shape, and a cylinder-shaped gas generator 13 is inserted into a through hole 25 at one end of the airbag container 12 and formed at one end of the gas generator 13. The gas generator 13 is fixed to the airbag container 12 by inserting the bolt 27 into the bolt hole formed at the other end of the airbag container 12 and fixing the nut 29 from the outside.

Inside the upper part of the air bag container 12, the gas inlet 15a side of the air bag body 15 is located in the retainer 3.
The rivet 33 is fixed via 1 and the airbag body 15 bulges toward the lid 17 by the gas ejected from the gas ejection port 13a of the gas generator 13 when the gas generator 13 is operated.

An outward flange portion 35 is formed on the upper end portion of the air bag container 12. Further, a plurality of tongue pieces 37 are formed on the back surface of the lid body 17 so as to project downward, and the tongue pieces 37 are respectively inserted into the plurality of long grooves 39 formed in the outward flange portion 35, and the tongue pieces 37 of the lid body 17 are formed. Is fixed to the upper portion of the airbag container 12 with a rivet 41. Although the tongue piece 37 of the lid body 17 is located outside the airbag housing body 12, it may be located inside the airbag housing body 12. In this case, the long groove 39 is formed in the outward flange portion 35. It does not have to be formed.

A plurality of protrusions 43 projecting downward are formed at the tip of the outward flange portion 35, and the plurality of protrusions 43 are formed.
Engagement grooves 45 are formed in the step portions 23 of the instrument panel 21 facing each other, and the plurality of protrusions 43 are inserted into the engagement grooves 45, respectively, and the engaged state is maintained. The step portion 23 of the instrument panel 21 is formed by cutting off a part of the synthetic resin material 21b joined to the panel 21a constituting the instrument panel 21. The lid 17 includes a core material 17a and the core material 17a.
It is formed of a synthetic resin material 17b integrally molded on the outer periphery of the core material, and the core material 17a and the tongue piece 37 can be formed in series.
7a and 7a can be formed in series.

[0014]

The above is the configuration of an embodiment of the airbag device according to the present invention. According to this configuration, an outward flange portion is formed at the upper end portion of the airbag container, and the outward flange portion is formed. Since the flange part is locked to the instrument panel, the instrument panel and the airbag storage body are securely assembled, and the lid and the instrument panel attached to the upper opening of the airbag storage body are secured. It is possible to prevent the positional displacement, and even if a load is applied to the upper part of the lid, the load is transmitted to the outward flange portion of the airbag container, and there is no risk of damaging the lid, An airbag device that can improve the rigidity and strength of the lid can be obtained.

According to a second aspect of the present invention, a protrusion projecting downward is formed at the tip of the outward flange of the airbag container, and the protrusion is engaged with the instrument panel. Since the engaging groove is formed, the instrument panel and the air bag housing can be assembled more reliably and the positional deviation can be prevented, and the contact surface between the instrument panel and the lid can be rubbed. It is possible to obtain an airbag device without the risk of causing

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an airbag device according to the present invention.

FIG. 2 is a partial cross-sectional view of the airbag device of the present invention.

FIG. 3 is a sectional view of a conventional airbag device.

FIG. 4 is a partial cross-sectional view of a conventional airbag device.

[Explanation of symbols]

 11 Airbag device 12 Airbag storage body 13 Gas generator 15 Airbag body 17 Lid body 21 Instrument panel 23 Step portion 35 Outward flange portion 37 Tongue piece 39 Long groove 43 Protrusion 45 Engagement groove

Claims (2)

[Claims] 1. A gas generator housed in an air bag housing opened at the top, and air fixed to the air bag housing so that gas from the gas generator flows in during operation of the gas generator. In an airbag device including a bag body and a lid body attached to an upper open portion of the airbag storage body in a state where the airbag body is folded and stored, an outward flange portion is provided at an upper end portion of the airbag storage body. And an outwardly facing flange portion which is locked to the instrument panel. 2. A protrusion protruding downward is formed at a tip of the outward flange portion, and an engagement groove with which the protrusion is engaged is formed in the instrument panel. Airbag device.