JP3119016B2 - 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.

[0002]

2. Description of the Related Art As a conventional airbag device, there is, for example, one shown in FIGS.
-87849).

FIG. 3 shows a front part of a vehicle cabin.
The airbag device is provided on the front passenger seat side in the front part of the passenger compartment. That is, as shown in FIG. 3, the airbag unit 103 is mounted in the instrument panel 101 on the passenger side of the passenger compartment.

The peripheral structure of the airbag unit 103 will be further described with reference to a cross-sectional view of FIG. 4 taken along the line IV-IV of FIG.

[0005] The airbag unit 103 is attached to a steering member 105 as a strength member in the instrument panel 101. On the other hand, the instrument panel 101 includes the airbag unit 10.
An opening 107 corresponding to No. 3 is provided. The opening 107 is closed by an air bag grid 109. The air bag grid 109 is provided with a support portion 111, and the support portion 111 is fixed to a mounting portion 113 on the instrument panel 101 side by a bolt nut 115.

Accordingly, the air bag grid 109 is normally used.
The opening 107 is closed by the airbag unit 1
03 is covered. When the inflator 103a is activated by a vehicle collision detection signal or the like, the gas pressure causes the airbag 117 to expand from the airbag unit 103 and push the airbag grid 109 open. At this time, the air bag grid 109 rotates around the point A. This opens the opening 107,
The airbag 117 is deployed toward the occupant side through the opening 107.

[0007]

However, like the instrument panel 101, the air bag grid 109 is composed of the core material 119, the pad 121, and the skin 123, and has a structure having some rigidity. Accordingly, when the deployment force of the airbag 117 is applied to the airbag grid 109, in combination with the attachment of the airbag lid 109 to the instrument panel 101, the force is transmitted to the instrument panel 101, and FIG. As a result, the whole is swelled as shown by the dotted line. And, as described above, the instrument panel 10
When the airbag grid 109 is inflated as a whole and a certain load is applied to the airbag grid 109, the airbag grid 109 starts rotating and deforming around the point A, and is opened as shown by a two-dot chain line in FIG.

Therefore, the force applied to rotate and deform the air bag grid 109 around the point A escapes to the instrument panel 101 side, and the smoothness of the opening of the air bag grid 109 may be slightly impaired.

Therefore, conventionally, the air bag grid 109
The rigidity of the instrument panel itself cannot be increased so much that the rigidity of the instrument panel 101 is inferior to that of the instrument panel 101, and there is a possibility that the consistency with the instrument panel 101 may become a problem.

Therefore, the present invention provides an air bag grid 1
It is an object of the present invention to provide an airbag device that can smoothly open an airbag lid with the deployment force of the airbag while maintaining the rigidity of the airbag.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 is arranged in an instrument panel at a front portion of a vehicle interior, and is fixed to a strength member on a vehicle body side to deploy an airbag. A possible airbag unit, an opening provided in the instrument panel corresponding to the airbag unit, an opening through which the airbag can pass, and the opening closed and assembled to the instrument panel, An airbag lid that can be opened about a fulcrum by an airbag to be mounted, and an arm that is supported by the instrument panel and has an arm portion that is in contact with the center of the airbag grid with respect to the fulcrum on the back side of the instrument panel. An anchor comprising a mounting bracket, the anchor being mounted on the anchor mounting bracket. Characterized by comprising the further configured with a hook for locking the instrument panel engaged with the anchor with become attached to the air bag unit side to the air bag unit side.

[0012]

According to the above construction, when the airbag is deployed upon detection of a vehicle collision, the deployment force is transmitted to the airbag grid, and the instrument panel to which the airbag grid is assembled tends to inflate. At this time, since the arm portion of the anchor mounting bracket is in contact with the center of the air bag grid itself rather than the fulcrum of the air bag grid on the back side of the instrument panel, the rotation of the instrument panel is restricted, and Is reliably transmitted to the instrument panel. The transmitted force allows the instrument panel side to be supported by the strength member on the vehicle body side via the airbag unit side by the engagement of the anchor and the hook. Therefore, the deployment force of the airbag is transmitted to the airbag lid as it is without inflating the instrument panel, and the airbag lid is smoothly opened by this force.

[0013]

Embodiments of the present invention will be described below.

FIG. 1 is a sectional view at substantially the same position as FIG. The airbag device of this embodiment is provided on the passenger seat side in the vehicle interior similarly to the above, and the airbag unit 3 is arranged in the instrument panel 1. The airbag unit 3 is fixed to a steering member 5 which is a strength member in the instrument panel 1 as described above. That is, the housing 9 containing the airbag 7 is attached to the guide plate 11, and the lower portion of the guide plate 11 is fixed to the steering member 5 via the housing bracket 13.

A hook 15 is fixed to the guide plate 11 by welding or the like, and a tip 15a of the hook 15 extends upward and inclining rearward of the vehicle.

On the other hand, the instrument panel 1
An opening 23, which comprises a panel body 17, an instrument pad 19, and a skin 21, is provided corresponding to the airbag unit 3 and can pass through the airbag 7. Opening 23
At the front side, a part of the panel body 17 is bent obliquely downward to form a mounting portion 25. A lid lock 27 is attached to each of the left and right sides (perpendicular to the paper surface) of the opening 23. The instrument pad 19 is formed thin around the opening 23, and
Is formed. The air bag grid 31 is fitted into the fitting portion 29.

The air bag grid 31 is provided with a pad material 3.
3, a skin 35 and a core 37. A peripheral edge 31 a of the air bag grid 31 is formed in a shape corresponding to the fitting portion 29. On the back surface of the air bag grid 31, a lid support portion 39 fixed to a core member 37 by a rivet or the like is attached at a substantially middle portion thereof. The lid support portion 39 is fastened and fixed to the mounting portion 25 of the instrument panel 1 by a bolt nut 41. Thus, the air back lid 31 is configured to be assembled to the instrument panel 1.

Further, a pin 43 is provided on the back surface of the air bag grid 31 at a position corresponding to the lid lock 27. The pin 43 has an enlarged head and is elastically fitted to the lid lock 27. Therefore, the air bag grid 31 is positioned on the panel main body 17 of the instrument panel 1 via the pin 43 and the lid lock 27.

On the other hand, one end 45a of an anchor mounting bracket 45 is fastened to the mounting portion 25 together. The other end 45b of the anchor mounting bracket 45 is the connecting bracket 4
7 is fastened and fixed by bolts and nuts 49. The connection bracket 47 is fixed to the panel main body 17 of the instrument panel 1.

The anchor mounting bracket 45
, An L-shaped anchor 51 is fixed by spot welding or the like. The anchor 51 is provided with an engagement hole 51a, and the tip 15a of the hook 15 is engaged with the engagement hole 51a.

Reference numeral 53 denotes a glove box, and 5
5 is a front window panel.

FIG. 2 is an exploded perspective view of the airbag device.

As shown in FIG. 2, the airbag unit 3
The guide plate 11 is provided so as to cover one side of the housing 9, and the hook 15 is attached to the guide plate 1.
1 is provided on both left and right sides. The housing bracket 13 is fixed to the steering member 5 by welding or the like.

The opening 2 of the instrument panel 1
The panel main body 17 is partially exposed around the periphery 3, and the mounting portion 25 extends along the opening 23.

The lid locks 27 are arranged as a pair on both left and right sides of the opening 23.

The lid support portion 39 of the air bag grid 31 also extends in the left-right direction corresponding to the mounting portion 25.

The anchor mounting bracket 45 also extends left and right along the mounting portion 25.
The anchor 51 has a pair of anchor mounting brats 4.
5 is fixed by spot welding or the like.

The anchor mounting bracket 45 includes
A pair of left and right arms 45C is provided.
5C is in contact with the back surface of the panel main body 17 on both left and right sides 17a of the opening 23.

Next, the engagement of the anchor 51 and the hook 15 when mounting the airbag unit 3 will be described.

First, in the airbag unit 3, the guide plate 11 to which the hooks 15 are attached and the housing 9 in which the airbag 7 is housed are assembled.

On the other hand, in the instrument panel 1, the anchor mounting bracket 45 to which the anchor 51 is fixed is attached to the mounting portion 25 by the bolt nut 41 at one end 45a.
, And the other end 45b is fastened and fixed to the connection bracket 47 by a bolt nut 49. The lid support portion 39 of the airbag lid 31 is fastened and fixed to the mounting portion 25 by a bolt nut 41. The pins 43 of the air bag grid 31 are elastically fitted to the lid lock 27 and positioned.

Accordingly, if the airbag unit 3 is fastened and fixed to the housing bracket 13 with bolts and nuts and the instrument panel 1 is assembled, the tip 15a of the hook 15 engages with the engagement hole 51a of the anchor 51. Becomes

Next, the operation will be described.

When the vehicle collision is detected, the inflator 3
When “a” is ignited, the gas pressure inflates the airbag 7, breaks the housing 9 and transmits the deployment force to the airbag lid 31. This force is transmitted to the panel body 17 side of the instrument panel 1 via the lid support portion 39 and the attachment portion 25. At this time, the mounting portion 25 is
While receiving a rotational force (left rotation in FIG. 1) around the center 5a, the arm 45c of the anchor mounting bracket 45 abuts against the back surface of the panel body 17 at the left and right sides 17a of the opening 23, and the rotation of the mounting 25 is restricted. You. Therefore, the force from the air bag grid 31 is reliably transmitted to the panel main body 17 of the instrument panel 1, and the instrument panel 1 tries to expand.

At this time, a force is transmitted to the guide plate 11, the housing bracket 13, and the steering member 5 through the engagement between the anchor 51 and the hook 15, and the mounting portion 25 of the panel body 17 is moved to the anchor 51, the hook. 1
5, is supported by the steering member 5 via the guide plate 11 and the housing bracket 13.
Therefore, the instrument panel 1 does not expand.

Therefore, all the deploying force of the airbag 7 is transmitted to the airbag grid 31, and the airbag grid 31 immediately rotates around the point A and is opened as shown by the two-dot chain line in FIG.

In this way, the opening operation of the airbag lid 31 is performed extremely smoothly, and the airbag 7 is easily deployed toward the occupant.

The open air bag grid 31 does not interfere with the front window panel 55 as shown by the two-dot chain line.

Further, since all the deploying force of the airbag 7 is input to the airbag grid 31 and the airbag grid 31 is smoothly opened, the rigidity of the airbag grid 31 can be increased to be equal to that of the instrument panel 1. Therefore, the air bag grid 31 fitted to the fitting portion 29 has a high shape holding performance together with the instrument panel 1, and has an extremely good matching state.

[0040]

As is clear from the above, according to the structure of the present invention, when the airbag deployment force acts on the airbag lid, the instrument panel to which the airbag lid is assembled tends to expand. At this time, since the arm portion of the anchor mounting bracket is in contact with the center of the air bag grid itself rather than the fulcrum of the air bag grid on the back side of the instrument panel, the rotation of the instrument panel is restricted, and Is reliably transmitted to the instrument panel. The transmitted force allows the instrument panel side to be supported by the strength member on the vehicle body side via the airbag unit side by the engagement of the anchor and the hook. Therefore, the deployment force of the airbag is transmitted to the airbag lid as it is without inflating the instrument panel, and the airbag lid is smoothly opened by this force.

Further, since the force acting on the air bag grid from the air bag does not escape to the instrument panel 1, the rigidity of the air bag grid itself can be increased, and the consistency with the instrument panel can be significantly improved. it can.

[Brief description of the drawings]

FIG. 1 is a sectional view according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a perspective view of a front portion of a vehicle interior showing an arrangement of an airbag device according to a conventional example.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument panel 3 Airbag unit 5 Steering member (body-strength member) 7 Airbag 15 Hook 23 Opening 31 Airbag grid 45 Anchor mounting bracket 45C Arm part 51 Anchor

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60R 21/20 B60R 21/16

Claims (1)

(57) [Claims] 1. An airbag unit disposed in an instrument panel at a front part of a vehicle interior, fixed to a strength member on a vehicle body side and capable of deploying an airbag, and the instrument panel corresponding to the airbag unit. provided, the opening can pass through the airbag, the instrument panel with closing the opening
I assembled it with, supported by an air bag to the expansion
An air bag grid that can be opened around a point, and supported by the instrument panel and
Above the fulcrum on the back side of the instrument panel
An arm with an arm that abuts the center of the airbag lid
And an anchor attached to the anchor attachment bracket.
When the hook more of configuration for locking happens when the instrument panel both engaged with the anchor attached to the air bag unit side to the air bag unit side
An airbag device, comprising: