JPH04356247A - Air bag device for assistant seat - Google Patents

Abstract

PURPOSE:To provide an air bag device for a passenger seat whose air bag can be installed by simple work. CONSTITUTION:An air bag device for a passenger seat has an air bag 1, an inflator 2, a case 3 and an annular retainer 6; a roughly downwardly extending projecting piece 7 is formed at the lower end portion of an annular retainer peripheral wall 17 and a first slit 13 through which the projecting piece is passed is formed through the upper portion of a case peripheral wall 5 and a second slit 8 through which the projecting piece is passed is formed at an air bag terminal portion 4 and an inflating portion 9 serving as a stopper is formed at the end of the air bag terminal portion. The projecting piece is passed through the second slit from outside the air bag so as to construct a sub-assembly and the projecting piece of the sub-assembly is passed through the first slit from above and inside the case and the sub-assembly is temporarily fixed to the case in such a manner that the inflating portion is exposed above the upper end face 3a of the case with the terminal portion sandwiched between the upper portion of the case peripheral wall and the lower portion of the annular retainer peripheral wall and the projecting piece and the case are stuck together with the sub-assembly temporarily fixed.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a passenger airbag device disposed on the passenger side of an automobile.
This invention relates to an airbag device for a passenger seat, which allows the airbag to be easily attached to a case during assembly.

0002

[Prior Art and its Problems] Conventionally, in airbag devices for passenger seats, the airbag is made of a retainer to which a plurality of bolts are fixed, or a plurality of nuts. The device was attached to the case using a retainer to which the device was attached (see U.S. Pat. No. 4,846,368).

That is, when using a retainer to which a plurality of bolts are fixed, each bolt is inserted into the mounting hole of the airbag terminal part, and the bolt is inserted into the mounting hole of the case from the inner circumferential side of the case. The air bag was attached to the case so as to be sandwiched between the retainer and the case by screwing nuts onto bolts protruding from the outer circumference of the case and fixing the retainer to the case.

On the other hand, when using a retainer to which a plurality of nuts are fixed, the airbag and retainer are placed on the inner circumferential side of the case so that the airbag's mounting hole and each nut of the retainer correspond to the case's mounting hole. By inserting bolts into each mounting hole from the outer circumferential side of the case, screwing the bolts into the nuts of the retainer, and bolting the retainer to the case, the air bag can be held between the retainer and the case. It was attached to.

However, when using the above-mentioned conventional retainer, the bolts or nuts of the retainer are positioned in the mounting holes of the terminal portion of the air bag as described above, but since the air bag is flexible, the positioning is difficult. This made it difficult to attach the air bag to the case. In particular, the airbag for the passenger seat airbag device has a larger shape when inflated than the airbag for the driver's seat airbag device, so it is heavier and takes more time to position.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an air bag device for a passenger seat, which facilitates the installation work of the air bag.

[0007]

[Means for Solving the Problems] An airbag device for a passenger seat according to the present invention includes an airbag, an inflator, a case in which the inflator is fixed to a lower part and opens upward, and a terminal portion of the airbag that is connected to the case. An airbag device for a passenger seat has an annular retainer mounted on an upper part of a peripheral wall of the case from above and inside the case, wherein a protruding piece extending substantially downward is formed at a lower end of the peripheral wall of the annular retainer, and the protruding piece is A first slit through which the air bag is inserted is formed in the upper part of the case peripheral wall, a second slit through which the projecting piece is inserted is formed in the end portion of the air bag, and a bulge for preventing the air bag from coming off is provided at the tip of the end portion of the air bag. the projecting piece is inserted into the second slit from the outside of the air bag to assemble the subassembly; the projecting piece of the subassembly is inserted into the first slit from above and inside the case; The subassembly is temporarily fixed to the case so that the terminal part is sandwiched between the upper part of the case peripheral wall and the lower part of the annular retainer peripheral wall, and the bulge part is exposed above the upper end surface of the case. It is characterized in that the projecting piece and the case are fixed together in a stopped state.

[0008] The vertical relationship in this invention refers to a relative vertical relationship, and refers to an absolute vertical relationship such as when an air bag device for a passenger seat is installed so that the air bag inflates substantially upward as in the embodiment described later. In addition to the relationship, it also includes the front-rear relationship in the horizontal direction, such as when an air bag device for a passenger seat is installed so that the air bag inflates toward the rear of the vehicle.

[0009]

According to the present invention, a subassembly is assembled by inserting a projecting piece into a second slit from the outside of the air bag, and a projecting piece of this subassembly is inserted into a first slit from above and inside the case. Temporarily fix the subassembly to the case so that the terminal part is sandwiched between the upper part of the case circumferential wall and the lower part of the annular retainer circumferential wall, and the retaining bulge is exposed above the upper end surface of the case. piece,
It makes the case stick together. This simplifies the work of attaching the air bag to the case.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 4, the passenger seat air bag device M of the embodiment is arranged above a grab box (not shown) in an instrument panel P on the passenger seat side of an automobile.

As shown in FIGS. 1, 2 and 3, this air bag device M includes an air bag 1, an inflator 2, a case 3 to which the inflator 2 is fixed at the bottom and opens upward, and a terminal portion 4 of the air bag 1. and an annular retainer 6 for attaching it to the upper part of the peripheral wall 5 of the case 3 from above and inside the case 3.

The air bag 1 is made of a cloth material that is flexible and impermeable to the gas supplied from the inflator 2. It is formed into a spherical shape. Further, the air bag 1 has a substantially rectangular cylindrical shape with the terminal portions 4 on the opening side separated from each other.

A second slit 8 is formed in the air bag end portion 4, into which the protruding piece 7 is inserted, and a bulge portion 9 is formed at the tip of the air bag end portion 4 over the entire circumference. . The bulging portion 9 is formed by folding back the cloth material of the airbag terminal portion 4, inserting a straight wire 10 made of metal or the like as a core material therein and sewing it.

The case 3 is a rectangular cylinder with a bottom made of sheet metal, has four side walls 5a, 5b, 5c, and 5d as a peripheral wall 5, and has a semi-cylindrical bottom. Each side wall 5
The upper end portions of a, 5b, 5c, and 5d are enlarged in diameter so that the annular retainer 6 can be inserted into the case 3. Attachment holes 11 for fixing the inflator 2 are formed in the lower portions of the side walls 5a and 5c (the attachment holes in the side walls 5c are not shown). In addition, each side wall 5a, 5b, 5c
, 5d is formed with a stepped portion 12, and this stepped portion 12 is formed with a plurality of first slits 13 through which the projecting pieces 7 of the annular retainer 6 are inserted from above. An annular retainer 6 is placed below each first slit 13 in the case 3.
A hole 15 is formed into which a rivet 14 is inserted for fixing. Further, a bracket 16 for bolting the air bag device M to the vehicle body B is fixed to the lower outer peripheral surface of the case 3.

The annular retainer 6 consists of four side walls 17a, 17b, 17c, and 17d as a peripheral wall 17.
A plurality of protrusions 7 extending downward are formed at the lower end portion of 7. Each projecting piece 7 has a hole 1 through which the rivet 14 is inserted.
8 is formed.

Next, a method of assembling the air bag device M having the above structure will be explained.

First, the inflator 2 is fixed to the case 3. Specifically, the bolt portion side 2a of the inflator 2 is inserted into the case 3 from the attachment hole 11 side of the side wall 5a, and the flange portion (not shown) of the inflator 2 is inserted into the attachment hole (not shown) of the side wall 5c. ), a bolt part (not shown) protrudes from the mounting hole of the side wall 5c, and a nut (not shown) is screwed into the bolt part, thereby attaching the inflator 2 to the case. Fixed at 3.

Next, the protruding piece 7 of the annular retainer 6 is inserted into the second slit 8 of the air bag 1 from the outside of the air bag 1 to assemble the subassembly.

Next, the projecting piece 7 of the subassembly is attached to the case 3.
is inserted into the first slit 13 from above and inside, and the bulging part 9 is inserted into the upper end surface 3a of the case 3 with the terminal part 4 being sandwiched between the upper part of the case peripheral wall 5 and the lower part of the annular retainer peripheral wall 17.
Temporarily fix the subassembly to the case 3 so that it is exposed above.

Next, the rivet 14 is inserted into the hole 18 of the projecting piece 7 and the hole 15 of the case 3 in a temporarily fixed state, and the rivet 14 is caulked to fix the annular retainer 6 to the case 3. After this fixation, as shown in FIGS. 2 and 3, the terminal portion 4 is sandwiched between the case circumferential wall 5 and the annular retainer circumferential wall 17, the bulging portion 9 is exposed above the case upper end surface 3a, and the terminal portion 4 is bulged. The portion 9 prevents the air bag 1 from coming off.

Next, the airbag 1 is folded and housed in the case 3. Note that the airbag 1 may be folded after being attached to the case 3, or may be attached to the case 3 in a pre-folded state.

In this way, the air bag device M is completed, and the air bag device M is attached to the vehicle body B using the bracket 16.
It is used by attaching it to.

As explained above, the air bag device M for a passenger seat according to this embodiment has the projecting piece 7 extending substantially downwardly formed at the lower end of the peripheral wall 17 of the annular retainer 6, and the projecting piece 7
A first slit 13 through which the protrusion is inserted is formed in the upper part of the case peripheral wall 5, a second slit 8 through which the protrusion 7 is inserted is formed in the air bag end portion 4, and a bulge is provided at the tip of the air bag end portion 4 to prevent the air bag from coming off. 9, insert the protruding piece 7 into the second slit 8 from the outside of the air bag 1 to assemble the subassembly, insert the protruding piece 7 of the subassembly into the first slit 13 from above and inside the case 3, The subassembly is temporarily fixed to the case 3 so that the terminal part 4 is sandwiched between the upper part of the case circumferential wall 5 and the lower part of the annular retainer circumferential wall 17, and the bulge part 9 is exposed above the case upper end surface 3a. In this state, the protruding piece 7 and the case 3 are fixed together.

[0025] Therefore, the work of attaching the air bag 1 to the case 3 is simplified.

[Brief explanation of drawings]

[Fig. 1] An exploded perspective view of an air bag device for a passenger seat according to an embodiment of the present invention.

[Figure 2] Perspective view of main parts of the device after assembly

[Figure 3] Cross-sectional view taken along line A-A shown in Figure 2

[Figure 4] Diagram showing the device installed in a car

[Explanation of symbols] M Air bag device for passenger seat 1 Air bag 2 Inflator 3 Case 3a Top end surface 4 Terminal section 5. Peripheral wall of the case 6 Annular retainer 7 Projection piece 8 Second slit 9. Swelling part 13 1st slit 17 Circumferential wall of annular retainer

Claims (1)

[Claims] 1. An air bag, an inflator, a case with the inflator fixed to a lower part and opening upward, and an annular retainer for attaching an end portion of the air bag to an upper peripheral wall of the case from above and inside the case. An airbag device for a passenger seat, comprising:
A projecting piece extending substantially downward is formed at a lower end of the peripheral wall of the annular retainer, a first slit through which the projecting piece is inserted is formed at an upper part of the case peripheral wall, and a second slit through which the projecting piece is inserted. is formed on the air bag terminal portion, and a bulge for preventing the air bag from coming off is formed at the tip of the air bag terminal portion, and the protruding piece is inserted into the second slit from the outside of the air bag to assemble the subassembly; The protruding piece of the subassembly is inserted into the first slit from above and inside the case, and the protruding portion is inserted into the bulge portion with the terminal portion being sandwiched between the upper part of the case circumferential wall and the lower part of the annular retainer circumferential wall. The air bag device for a passenger seat is characterized in that the subassembly is temporarily fixed to the case so that the subassembly is exposed above the upper end surface of the case, and the projection piece and the case are fixed in the temporarily fixed state.