JPH08295198A - Air bag device - Google Patents

Abstract

PURPOSE: To secure an air bag door molded out of resin up to its mounting section to an air bag case together with an air bag without deforming the air bag door. CONSTITUTION: When an air bag door is to be secured together with an air bag by each rivet 8 so as to be fixed to an air bag case 3, the rivet hole 5a of the air bag door 4 and a rivet shaft 9 to be inserted into the rivet hole 5a are made larger in diameter as specified than the rivet hole 3a of the air bag case 3. The large diameter section 10 of the rivet shaft 9 is meshed with the peripheral section of the rivet hole 3a of the air bag case 3, the air bag and the air bag case 3 are held so as to be fixed by the seat face 11 at the air bag side of the rivet 8 and the aforesaid large diameter section 10, and meanwhile, the air bag door is held so as to be fixed by the seat face 12 at the air bag side of the rivet 8 and the air bag case 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an improvement of an air bag door mounting structure in a passenger seat air bag device.

[0002]

2. Description of the Related Art Generally, an air bag device is provided with an inflator which is a gas generator, an air bag which is inflated by the gas of the inflator, and an air bag case which encloses the inflator together with the air bag.

The airbag device is not limited to the driver's seat,
A passenger seat has also been developed. This passenger side airbag device is equipped with a door at the opening of the airbag case to be mounted inside the instrument panel of the vehicle, and the airbag door constitutes a part of the instrument panel. It is designed to maintain the natural appearance of the interior of the car.

In recent years, the number of the airbag doors made of resin up to the mounting portion to the airbag case has been increasing. In such airbag doors, due to the creep of the material, it is common to use them together with the airbag. It is difficult to tighten, and therefore, as shown in FIG. 3, a mounting surface 15 dedicated to the door is formed in the airbag case 3 ', and the door 4'is fixed by the rivet 14 separately from the airbag 2. There is.

[0005]

However, in the above-mentioned conventional air bag device, since the air bag and the air bag door are separately fixed as described above, a large number of bolts and nuts and rivets are required, and the assembling work is also performed. Also has two steps,
Further, there is a problem that the shape of the airbag case becomes complicated in order to secure a mounting surface dedicated to the door.

The present invention copes with the actual situation as described above, and particularly, by forming the rivet into a stepped shape, the air bag door and the air bag can be jointly fastened, and the number of parts of the air bag device and the number of assembling steps are increased. It is intended to reduce the power consumption and to make the module compact.

[0007]

That is, the feature of the airbag device of the present invention which meets the above-mentioned object is that the attachment portion of the airbag is overlapped with the inside of the opening portion of the airbag case and the opening portion of the airbag case is overlapped. The airbag door mounting part is superposed on the outside of the airbag, and the airbag and the airbag door are fixed to the airbag case by a common rivet, and the rivet hole of the airbag door and the rivet hole of this door are fixed. The rivet shaft to be inserted is formed to have a required larger diameter than the rivet hole of the airbag case, and the large diameter portion of the rivet shaft is engaged with the rivet hole edge portion of the airbag case, so that the rivet airbag side While the air bag and the air bag case are sandwiched between the seat surface of the rivet and the large diameter portion, the seat surface of the rivet on the air bag door side and the air bag case. Scan to be in a place that was clamped to the air bag door.

The large diameter portion of the rivet shaft may be formed by inserting a sleeve into the rivet shaft.

[0009]

In the airbag device of the present invention, the force of the rivet for fastening the airbag case is not applied to the mounting portion of the airbag door. Therefore, the mounting portion of the airbag door is made of resin. In addition, it is possible to tighten together with the airbag without any problems, and as a result, the number of parts and the number of assembly steps can be reduced compared with the conventional one, and the shape of the airbag case can be simplified to make the module compact. Is possible.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 (A) is a sectional view showing the state of attachment of an airbag door and an airbag to a case in an airbag apparatus of the present invention, and FIG. 1 (B) is a sectional view showing the state after attachment. 2 and 3 are exploded perspective views of the apparatus of the embodiment.

The airbag device according to the above-described embodiment of the present invention is for a passenger seat, and as shown in FIG.
And an airbag 2 inflated by this inflator,
An airbag case 3 that stores the inflator 1 and the airbag 2 and an airbag door 4 that closes an opening P of the airbag case 3 are provided.

The airbag door 4 has a mounting portion 5 extending substantially orthogonal to the door 4, and the mounting portion 5 is formed integrally with the door 4 by the same synthetic resin as the door body 4. .

In the airbag device of this embodiment, as shown in FIG.
As shown in (A) and (B), the mounting portion 6 of the airbag 2 and the retainer 7 are overlapped with each other inside the opening P of the airbag case 3, and the airbag door is provided outside the case opening P. The mounting portion 5 of 4 is overlapped, and the airbag 2 and the airbag door 4 are fixed to the airbag case 3 by the three rivets 8 for co-fastening via the retainer 7.

In the embodiment of the present invention, as shown in FIG.
As shown in (B), the rivet hole 5a of the airbag door mounting portion 5 and the shaft 9 of the rivet 8 which is inserted through the rivet hole 5a are larger than the rivet hole 3a of the airbag case 3 as shown in FIG. The large diameter portion 10 of the rivet shaft 9 is engaged with the edge portion of the rivet hole 3a of the airbag case 3, and the seat surface 11 of the rivet 8 on the airbag 2 side and the large diameter portion 10 are formed. The airbag 2 and the airbag case 3 are sandwiched, while the seat surface 12 of the rivet 8 on the airbag door 4 side and the airbag case 3 sandwich the airbag door 4.

As shown in FIG. 2, the door mounting portion 5 is formed with two through holes 13 having a diameter larger than that of the rivet hole 5a. Regardless of this, the head part 14a of the normal rivet 14 shown in the same figure is inserted and the rivet 14 is used to fasten only the airbag case 3, the airbag mounting portion 6, and the retainer 7.

However, in the airbag device of the embodiment of the present invention, as shown in FIG. 1B, the force of the rivet 8 for fastening the airbag 2 and the case 3 is applied to the mounting portion 5 of the airbag door 4. Therefore, even if the airbag door mounting portion 5 is made of resin, it can be fastened together with the airbag 2 without any fear of deformation.

As a result, the number of parts such as rivets and the man-hours for assembling the airbag door are reduced as compared with the conventional one, and the shape of the airbag case is simplified because the conventional door-dedicated mounting surface is unnecessary. This makes it possible to make the airbag module compact.

[0019]

As described above, in the airbag device of the present invention, the airbag door is fixed to the airbag case by co-fastening the rivet together with the airbag. , A rivet shaft that is inserted through this rivet hole is formed to have a larger diameter than the rivet hole of the airbag case, and the large diameter portion of the rivet shaft is engaged with the rivet hole edge portion of the airbag case. While sandwiching the airbag and the airbag case with the airbag-side seat surface of the rivet and the large diameter portion, the airbag door is seated with the airbag-door seat surface of the rivet and the airbag case. The rivet has a large diameter part that is sandwiched so that the force of the rivet that fastens the airbag and case is applied to the attachment part of the airbag door. Therefore, even if the attachment part of the airbag door is made of resin, it can be tightened together with the airbag without fear of deformation. As a result, the number of parts such as rivets and the airbag door can be reduced compared to the conventional case. The number of assembling steps is reduced, and the conventional door-dedicated mounting surface is not required, so that the shape of the airbag case is simplified and the airbag module can be made compact.

[Brief description of drawings]

FIG. 1A is a cross-sectional view showing an attachment state of an airbag door and an airbag to a case in an airbag device according to an embodiment of the present invention. FIG. 3B is a sectional view showing a state after attachment.

FIG. 2 is an exploded perspective view of the apparatus of the embodiment.

FIG. 3 is a cross-sectional view showing a conventional passenger airbag device.

[Explanation of symbols]

 1 Inflator 2 Airbag 3 Airbag case 3a Airbag case rivet hole 4 Airbag door 5 Airbag door mounting part 5a Airbag door mounting part rivet hole 6 Airbag mounting part 7 Retainer 8 Co-tightening rivet 9 Rivet shaft 10 Large diameter part of rivet shaft 11, 12 Rivet seat surface 13 Through hole 14 Normal rivet P Case opening

Claims (2)

[Claims] 1. An airbag mounting portion is superposed on the inside of an opening of an airbag case, and an attaching portion of an airbag door is superposed on the outside of the opening of the airbag case. Is fixed to the airbag case with a common rivet, and the rivet hole of the airbag door and the rivet shaft that is inserted through the rivet hole of the door have a larger diameter than the rivet hole of the airbag case. Formed, by engaging the large diameter portion of the rivet shaft with the rivet hole edge of the airbag case,
While sandwiching the airbag and the airbag case with the airbag-side seat surface of the rivet and the large diameter portion, the airbag door is seated with the airbag-door seat surface of the rivet and the airbag case. An air bag device characterized by being sandwiched. 2. The airbag device according to claim 1, wherein the large-diameter portion of the rivet shaft is formed by a sleeve fitted into the rivet shaft.