JPH0594030U - Automotive airbag device - Google Patents

Abstract

(57) [Abstract] [Structure] An inflator 3 and an air bag 4 are housed in the air bag housing 2, and an air bag door 5 that covers the upper opening of the air bag housing 2 is provided. In the airbag device 1 mounted so that the bag 4 is inflated and pushes the airbag door 5 open to inflate and protrude above the instrument panel 7, the airbag door 5 is provided between the airbag container 2 and the airbag door 5. An opening control member 7 is provided to control the opening of the above in a predetermined range. [Effect] When the airbag 4 is inflated and the airbag door 5 is pivoted upward around the front fixing portion and opened,
The opening operation of the airbag door 5 is stopped by the opening control member 7 before it hits the windshield 9, and the airbag door 5 is opened.
The windshield 9 is prevented from being damaged by the collision of the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automobile airbag device.

[0002]

[Prior Art]

 As one of safety measures against the collision of a car, an airbag device has been conventionally used in which the inflator is actuated at the time of a collision to inflate the airbag, and the head of an occupant leaning forward due to the collision is received by the inflated airbag. More variously developed, the passenger airbag device is often attached to an instrument panel portion in front of the passenger seat so that the airbag is inflated and projected above the instrument panel (for example, (See Japanese Patent Laid-Open No. 2-303952).

[0003]

[Problems to be solved by the device]

 As described above, in the case of a top-mount type airbag device in which the airbag door is set on the upper surface of the instrument panel, the airbag door is pivoted upward around the front edge of the airbag door when the airbag is inflated to open. In this case, there is a high possibility that the rear edge of the airbag door will collide with the windshield, and the collision may damage the front glass.

The present invention mainly aims to address the above-mentioned conventional problems.

[0005]

[Means for Solving the Problems]

 The present invention is an airbag device as described above, which comprises an opening regulating member for connecting the left and right side surfaces of the airbag storage body and the vicinity of the left and right side portions of the airbag door to restrict the opening degree of the airbag door within a predetermined range. The provision is provided as a first feature. A second feature is that the opening regulating member is provided with a fuse portion that is broken by a tensile load of a predetermined value or more.

[0006]

[Action]

 By adopting the above configuration, when the airbag is inflated, the opening operation of the airbag door is stopped before hitting the windshield by the opening control member, or after the opening control member is fully extended immediately before hitting the windshield. The fuse part breaks and hits the front glass, causing the airbag door not to hit the windshield at all, or even if it hits it fairly weakly. Disappear.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an airbag device for a passenger seat. The airbag device 1 has an inflator 3 and a folded airbag 4 housed in an airbag container 2 having an open upper portion, and an airbag storage device. The upper opening of the body 2 is closed by an airbag door 5.

The airbag door 5 is composed of a base material 51 made of, for example, an aluminum material or a hard plastic material, a shock absorbing layer 52 made of foam such as urethane laminated on the surface thereof, and a skin 53 on the surface thereof. A hinge member 51a made of, for example, iron is fixed behind the front edge of the base material 51 by a predetermined dimension, and the hinge member 51a is joined and fixed to the front edge of the opening of the airbag container 2, and the predetermined distance from the rear edge of the base material 51. By fixing the position in front of the dimension to the trailing edge of the opening of the airbag container 2 with a bracket 6 having a breakage portion 6a that is broken by a load of a predetermined value or more, the airbag door 5 has its peripheral portion The air bag container 2 is attached to the opening of the air bag container 2 in a state of protruding in a flange shape from the peripheral edge of the opening of the air bag container 2, and the portion protruding in the flange shape is installed. It becomes a joint surface to the seat surface 8b provided around the hole 8a of the ment panel 8.

As shown in FIG. 1C, the left and right side surfaces of the base material 51 of the airbag door 5 and the left and right side surface portions of the airbag storage body 2 are made of a belt, cloth or the like. The opening regulation member 7 is connected, and the opening regulation member 7 regulates the opening of the airbag door 5 within a certain range.

In the airbag device 1 configured as described above, the outer peripheral joint surface of the airbag door 5 is placed on the seat surface 8b around the hole 8a of the instrument panel 8 and temporarily fixed to store the air bag. The bottom of the body 2 is fixedly mounted on a beam (not shown), which is a member on the vehicle body side, via a bracket or the like, as in the conventional case, and mounted.

In the above, when a collision sensor (not shown) detects a collision, the detection signal causes the inflator 3 to operate, and the air bag 4 folded by the generated gas expands. The bracket 6 breaks at the breaking portion 6a by the pressure of the airbag inflation, and the airbag door 5 pivots upward around the fixing portion by the hinge member 51a to open, and the airbag 4 moves above the instrument panel 8. The airbag door 5 receives the head of the occupant who is inflated and protrudes, but the airbag door 5 is restricted in its rotation range by the opening degree control member 7, so that the airbag door 5 collides with the windshield 9. However, there is no possibility of damage to the windshield due to the collision of the airbag door. The reaction force when the airbag device is activated is supported by the beam, which is a member on the vehicle body side as before.

2 and 3 show second and third embodiments of the present invention, respectively, showing examples in which the opening degree control member 7 is provided with a fuse function.

That is, in FIG. 2, the opening regulating member 7 connecting the left and right side surfaces of the upper opening of the airbag housing 2 and the vicinity of the left and right side portions of the base material 51 of the airbag door 5 has a predetermined value or more. The fuse portion 7a that is broken by a tensile load is formed by a notch or the like, and when the airbag door 5 is opened by expansion of the air bag, the opening regulation member 7 is fully extended at a predetermined opening, and then the fuse portion 7a is broken In addition, the airbag door 5 is further opened so that the edge of the airbag door 5 contacts the windshield 9.

Further, in FIG. 3, a fuse portion 7b is formed by tucking in a part of the cloth opening control member 7 and sewing the same, and the airbag door 5 is opened to a predetermined opening to open the opening control member. After the yarn 7 has been fully extended, the sewing thread of the fuse portion 7b is cut, and the tucked portion is extended, so that the airbag door 5 is further opened to hit the windshield 9.

In both the second and third embodiments, immediately before the airbag door 5 hits the windshield 9, the opening operation is once regulated by the opening regulation member 7, and then the fuse portion 7a or 7b is broken. Then, the opening regulation is released, and further pivoting hits the windshield 9, so the energy for opening the air bag door 5 is absorbed by breaking the fuse portion, and the windshield 9 is exposed. The hit is fairly weak and the windshield 9 is not damaged.

[0016]

[Effect of the device]

 As described above, according to the present invention, the air bag device is actuated by providing the opening regulating member for regulating the opening degree of the airbag door between the airbag housing and the airbag door. At the same time, it can completely solve the conventional problem that the airbag door may crash into the windshield and damage it, which is practical in combination with the simple structure and low cost. It can bring great effects.

[Brief description of drawings]

1A and 1B show a first embodiment of the present invention, in which FIG. 1A is an external perspective view of an airbag device mounting portion, FIG. 1B is a sectional view taken along line XX of FIG. 1A, and FIG. It is a perspective view which shows the outline of a related structure of a bag storage body and an airbag door.

FIG. 2 is a side view of essential parts showing a second embodiment of the present invention.

3A and 3B show a third embodiment of the present invention, in which FIG. 3A is a side view of a main part, and FIG. 3B is a sectional view taken along line YY of FIG.

[Explanation of symbols]

 1 Airbag Device 2 Airbag Storage Body 3 Inflator 4 Airbag 5 Airbag Door 7 Opening Control Member 7a Fuse Part 7b Fuse Part 8 Instrument Panel 8a Hole 8b Seat Surface 9 Windshield 51 Base Material 51a Hinge Member 52 Shock Absorption Layer 53 Epidermis

Claims (2)

[Scope of utility model registration request] 1. An airbag storage body having an opening portion in an upper portion and storing an inflator and a folded airbag therein, and an airbag door closing the upper opening portion of the airbag storage body. The airbag door is assembled by aligning it with the hole provided in the instrument panel, and when the airbag is inflated, the airbag door pivots upward around the fixing part to the airbag storage body on the front side to open. In the airbag device, the opening control member for connecting the left and right side surfaces of the airbag storage body to the vicinity of the left and right side portions of the airbag door is provided for restricting the opening degree of the airbag door within a predetermined range. An air bag device for automobiles characterized by the above. 2. An air bag device for an automobile, wherein the opening regulating member according to claim 1 is provided with a fuse portion which is broken by a tensile load of a predetermined value or more.