JP2658604B2 - Airbag device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device provided in a vehicle instrument panel, a door trim or the like.

[0002]

2. Description of the Related Art In recent years, an airbag device has been proposed as a device for protecting an occupant in a vehicle emergency.

[0003] In this airbag device, when the vehicle is suddenly decelerated, the airbag bag is filled with gas and the airbag bag is inflated to advance forward or to the side of the occupant to protect the occupant.

For example, an instrument panel (hereinafter, referred to as an instrument panel)
As an airbag device attached to the instrument panel)
One example is disclosed in Japanese Utility Model Laid-Open No. 2-149346. As shown in FIG. 5 , in this airbag apparatus, an airbag constituting a part of an instrument panel is provided on an airbag unit side having an airbag unit and a case for accommodating the airbag unit. A door 80 is provided. In the upper portion 82 of the airbag door 80, the second portion 82B is rotated counterclockwise (in the direction of arrow A in FIG. 5 ) about the hinge portion 84, and the first portion 82A is rotated.
A leaf spring 86 is provided for making contact with the spring. In addition, a lower portion 88 of the airbag door 80 includes a second portion 88.
B in the clockwise direction around the hinge 90 (arrow B in FIG. 5 ).
Direction), and a leaf spring 92 is provided to abut the first portion 88A. Therefore, when the airbag body is deployed, the thin portion 81 of the airbag door 80 is broken by the pressing force when the airbag body is inflated.
2, the upper part 82 and the lower part 88 are each folded in two, so that the projecting amounts of the upper part 82 and the lower part 88 toward the vehicle interior are reduced.

[0005]

However, in this airbag door apparatus, the upper portion 82 and the lower portion 88 of the airbag door 80 are folded in two by leaf springs 86 and 92, respectively. Therefore, the upper portion 82 and the lower portion 88 of the airbag door 80 when the airbag body is deployed.
In order to ensure that each of them is folded in two, the leaf spring 86,
It is necessary to increase the urging force of 92. For this reason, there is a problem that the leaf springs 86 and 92 become large and the storage space for the airbag unit becomes narrow. Also, leaf springs 86, 9
If the urging force of 2 is too large, there is a problem that the airbag door 80 is folded in half by the urging forces of the leaf springs 86 and 92 even when the airbag bag body is not deployed.

SUMMARY OF THE INVENTION In view of the above, the present invention provides an airbag in which the airbag door can be reliably bent when the airbag body is deployed without providing a biasing means for bending the airbag door. The purpose is to get the device.

[0007]

SUMMARY OF THE INVENTION According to the present invention, when the airbag bag is inflated, the airbag is deployed between the passenger compartment side and the occupant, and a part of the airbag is bent over a thin portion to allow the airbag to enter the passenger compartment. What is claimed is: 1. An airbag device comprising an airbag door configured to reduce a protrusion amount, wherein the airbag device is provided on the airbag door, restricts deployment of the airbag door when the airbag door is deployed, and inflates the airbag bag body. Due to the pressing force at the time, the lower part of the airbag door stands substantially horizontally and the upper part stands substantially vertically.
It is characterized by having a bending means for bending as described above .

[0008]

According to the first aspect of the present invention, when the airbag body is deployed, the airbag door is deployed toward the vehicle interior by the pressing force of the airbag body, and is deployed by the bending means. Be regulated. As a result, the airbag door is substantially horizontal on the lower side and substantially vertical on the upper side of the thin-walled portion.
It is bent so that it stands up. Therefore, it is possible to reliably bend the airbag door by using a part of the deployment force when the airbag body is deployed, without providing a biasing means for bending the airbag door. I can . Also,
By folding the airbag door in this way,
Compared to the case where the airbag door is not bent in this way,
When the width of the airbag door protruding into the cabin is equal,
Can expand the deployment space for airbag bags.
Wear. As a result, the airbag bag is attached to the airbag door.
Therefore, the airbag bag is not hindered from being deployed.
The body deployment time can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

In the drawings, an arrow FR indicates a forward direction of the vehicle body, an arrow IN indicates an inward direction of the vehicle width, and an arrow UP indicates an upward direction of the vehicle body.

As shown in FIG. 2, a door opening 14 is formed in an upper portion of a front side door inner panel 12 as a door panel constituting the front side door 10. An airbag unit 16 is attached to the front side door inner panel 12 near the door opening 14 on the vehicle interior side surface.

As shown in FIG. 1, the upper end and lower end of the bracket 16A of the airbag unit 16 are fixed to the front side door inner panel 12 from the inside of the vehicle by bolts 24 and nuts 26, respectively. An airbag cover 18 as a part of the airbag unit 16 is covered on the vehicle interior side of the unit 16. In the airbag cover 18, an airbag bag 20 is stored in a folded state.
0 is provided with an inflator 22. The inflator 22 is filled with a gas generating substance, and the gas generating substance is provided with ignition means, and the inflator 22 is ignited via the ignition means by the operation of a sensor (not shown) to start combustion, The gas generated by the combustion is ejected from a number of openings to inflate the airbag body 20.

The lower end 18A of the airbag cover 18 is
Bolt 2 on bracket 16A of airbag unit 16
8 and a nut 30. An upper portion of the fixing portion is a hinge portion 18B. Therefore, when the airbag body 20 is inflated, the airbag cover 18
As shown by the imaginary line in FIG. 1, the airbag body 20 is pressed by the airbag body 20 and expands toward the interior of the vehicle around the hinge 18B.

As shown in FIG. 2, a door trim 36 is disposed on the vehicle interior side of the front side door inner panel 12. The door trim 36 has a substantially rectangular airbag door 42 corresponding to the airbag cover 18.
The door trim 36 can be attached to the front side door inner panel 12 with a clip, a screw, or the like.

As shown in FIG. 1, the airbag door 42
The lower end 42A of the resin hinge 4 is made of an extensible resin hinge 4.
4, the armrest 36 </ b> A of the door trim 36 is fixed substantially vertically to the outer end of the vehicle compartment. A notch 46 having a V-shaped cross section along the vehicle body front-rear direction is formed from the outside of the cabin at a substantially central portion of the airbag door 42 in the vehicle body vertical direction, and the bending strength of this portion is reduced. .

As shown in FIG. 3, the airbag door 42
A hook 42C is formed at the upper end 42B of the strap 48. One end 48A of a strap 48 as a bending means is connected to the hook 42C. The strap 48 is made of a material that does not easily expand and contract, and the other end 48B is connected to an anchor 50 as shown in FIG. The anchor 50 is fitted in a through hole 52 formed in the front side door inner panel 12. The length of the strap 48 is such that the upper portion 42D of the airbag door 42 stands substantially vertically when the airbag door 42 is deployed. The height L of the lower side portion 42E of the airbag door 42 is substantially equal to the sum of the unfolded thickness of the airbag body 20 and the width N of the horizontal surface of the upper end portion 42B of the airbag door 42. I have.

Next, the operation of this embodiment will be described.

When the sensor is activated, the gas generating substance of the inflator 22 is ignited via the ignition means to start combustion, and the gas generated by the combustion is ejected from a number of openings to expand the airbag bag body 20. Start. In this case, the airbag cover 18 expands in the vehicle interior side around the hinge 18B by the pressing force when the airbag bag 20 is inflated, and the pressing force when the airbag bag 20 inflates. The airbag door 42 is deployed with an arc-shaped trajectory (arrow S <b> 1 in FIG. 1) toward the interior of the vehicle around the hinge 44 as the center of rotation.

In this case, the airbag door 42 is connected to the hinge 4
When the airbag door 4 is deployed at a predetermined angle in the vehicle interior direction around the center of rotation, the strap 48 is fully extended, and the deployment of the upper end portion 42B of the airbag door 42 in the direction of arrow S1 is restricted. For this reason, the airbag door 42
The upper part 42D of the airbag door 42 is developed by drawing a locus (arrow S2 in FIG. 1) with a small amount of protrusion toward the vehicle interior, and the upper part 42D is substantially vertically Standing, the lower portion 42E is substantially horizontal above the armrest 36A. Therefore, when the airbag body 20 is deployed, a part of the deployment force is used to reliably bend the airbag door 42 without providing an urging means for bending the airbag door 42. Can be done.

The airbag door 42 is connected to the imaginary line in FIG.
As shown in the figure, the lower part is substantially horizontal and the upper part is substantially vertical.
When the airbag door 42 has the same amount of protrusion (projection width) toward the vehicle interior as compared to the case where the airbag door 42 is not bent in this manner, the airbag bag body is bent. Expanding 20 deployment spaces
Can be. As a result, the airbag bag 20 is
Without being disturbed by the good door 42,
The deployment time of the airbag body 20 can be reduced. Further, the amount of protrusion of the airbag door 42 toward the vehicle interior can be adjusted by the position where the notch 46 is provided.

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

[0031]

[0032]

[0033]

[0034]

In each of the above embodiments, the notch 46 is provided at the bent portion of the airbag door. Alternatively, the notch may be provided at the bent portion of the airbag door. The airbag door may be divided at the bent portion of the door, and the airbag doors divided by a member having lower bending strength than the airbag door may be connected to each other. Furthermore, as for the bending means, only those using a strap have been described,
Any structure may be used as long as the airbag door is bent using a part of the deployment force of the airbag, and other structures may be used.

[0036]

As described above, the present invention has the above-mentioned structure, so that there is no urging means for bending the airbag door.
It has an excellent effect that the airbag door can be reliably bent when the airbag body is deployed. Also air
Stand the bag door upright with the lower part approximately horizontal and the upper part approximately vertical
Airbag door car compared to the case without bending
If the width of the airbag bag is the same,
Excellent effect that the open space can be expanded
Have.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an airbag device according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a front side door to which the airbag device according to one embodiment of the present invention is applied.

FIG. 3 is a side sectional view showing a strap connecting portion of the airbag device according to one embodiment of the present invention.

FIG. 4 is a side sectional view showing a strap connecting portion of the airbag device according to one embodiment of the present invention.

FIG. 5 is a side sectional view showing an airbag door of a conventional airbag device.

[Explanation of symbols]

 Reference Signs List 10 front side door 12 front side door inner panel 16 airbag unit 20 airbag bag body 42 airbag door 46 notch 48 strap

Claims (1)

(57) [Claims] When the airbag body is inflated, the airbag body inflates with the side of the vehicle interior.
An airbag device including an airbag door that is configured to be deployed between an occupant and partially bent at a thin portion to reduce the amount of protrusion to the vehicle interior, wherein the airbag device includes: provided in the door the air bag door deployment the airbag door the airbag door lower portion a substantially horizontally by the pressing force at the time of expansion of the restricted deployment air bag body of the time
An airbag device, characterized in that the airbag device further comprises bending means for bending the upper part so as to stand substantially vertically .