JPH0647058U - Airbag device with inner door - Google Patents

Abstract

(57) [Abstract] [Purpose] By partially using a retainer that attaches an airbag to a case in an airbag device that has an inner door disposed in the opening and serves as a protective cover for the stored airbag. By simplifying the attachment of the inner door to the case, the airbag device can be manufactured at a lower cost. [Structure] Fixed part 9 having elasticity from inner door 6
Is extended to the vicinity of the retainer 4 along the outer surface of the side wall 3 of the airbag case 2, and the airbag 5 and the case 2 are penetrated from the retainer 4 so that the engagement projection 10 is formed.
Is characterized in that the inner door 6 is fixed to the airbag case 3 by hooking the engaging projection 10 into the hole 11 formed with the fixing portion 9 of the inner door 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an airbag device for a passenger seat, and more particularly to an airbag device having an inner door that protects an airbag housed in an airbag case instead of a normal airbag door.

[0002]

[Prior art]

 An airbag device for the passenger seat is a safety device that protects the occupant by instantly expanding the bag to assist the seat belt in the event of a vehicle collision and if the impact is more than a predetermined amount, and is usually a gas generator. It is composed of a certain inflator, a bag which is inflated by the gas of the inflator, and an air bag case which encloses the inflator together with the bag in a substantially airtight manner. When the airbag device is operated, the gas ejected from the inflator fills the airbag case and the airbag to generate an internal pressure, and the airbag deploys due to the internal pressure.

On the other hand, in the passenger side airbag device, an airbag door forming a part of an instrument panel is generally attached to the module itself, and the door closes the airbag case. However, the air bag inside the case is prevented from popping out and foreign matter is prevented from entering the case when the device is transported.

In addition to the above-described airbag device, recently, as shown in FIG. 9, many airbag devices 18 which are separate from the instrument panel P have been manufactured. That is, this device is attached to the instrument panel P having a structure that opens rupturely by the divided aluminum inserts 19 as shown, without having the above-mentioned air bag door. In order to prevent the air bag 5 from popping out and the foreign matter from entering as described above, an elastic resin inner door 20 with a slit 7 as shown in FIG. 10 is fitted and fixed as a protective cover. ing .

When this device is operated, the slit 7 provided in the inner door 20 is cut by the airbag 5 which is inflated by the behavior of the inflator 8 as shown in FIG. Is deformed from the root, and finally the outer skin 21 of the instrument panel P is deployed in such a manner that the airbag 5 pierces through the inner door 20 and the aluminum insert 19.

[0006]

[Problems to be solved by the device]

 However, although the inner door preferably protects the airbag as described above, when it is attached to the airbag case, a dedicated hole is formed in the side wall along the entire circumference of the case, and the pin and the nut spring are not provided. Therefore, the inner door must be fixed in the hole of this case, and there is a restriction or man-hours to secure the space for forming the exclusive hole in the case, to make the hole, or to attach the pin. Then, there is a problem that the cost of the air bag device becomes high.

The present invention copes with the above-mentioned actual situation, and in particular, by partially utilizing a retainer for attaching the airbag to the case, the inner door is easily attached to the case, and the airbag is simplified. The purpose is to manufacture the device at a lower cost.

[0008]

[Means for Solving the Problems]

 That is, the feature of the airbag device of the present invention which meets the above-mentioned purpose is that the airbag base is attached to each side wall of the airbag case that defines the opening by sandwiching it with the retainer arranged inside the case. On the other hand, in an airbag device in which an inner door that folds and stores an airbag in the opening and that protects the airbag from the outside is disposed in the opening of the case, an elastic fixing is performed from the inner door. A part extending along the outer surface of the side wall of the case to the vicinity of the retainer, and a protrusion for engagement is formed by penetrating the airbag and the case from the retainer, and the protrusion for engagement is fixed to the inner door. The inner door is fixed to the airbag case by being hooked on the hole drilled in the section.

Examples of the engaging projections include pins fixed to the retainer, cut-and-raised pieces of the retainer, airbags and cases, and rivets and bolts that fix the retainer. Then, after fixing the inner door with the engaging projections, a part of the inner door extending to the fixing position of the vehicle instrument panel and the airbag is fixed by a fastener that fixes the case and the panel. Furthermore, it is also preferable to connect them together.

[0010]

[Action]

 In the airbag device of the present invention having the above-mentioned configuration, the elasticity of the fixing portion is used, and the fixing portion is pulled and hung on the engaging projection, so that the inner door can be easily attached to the case by the retainer. In addition, unlike the conventional case, it is not necessary to provide a dedicated mounting hole in the case.Therefore, there is no need for labor and design restrictions due to the drilling of this hole. It is possible to reduce the cost of the bag device.

[0011] Furthermore, by using the fasteners of the case and the instrument panel and by further tightening the inner doors together, the inner doors can be fixed more securely, and by using the fasteners together, It is also possible to reduce the number of fasteners and reduce the cost of the fastener itself and the torque management man-hour at the time of fastening.

[0012]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a sectional perspective view showing an airbag device of a first embodiment of the present invention, FIG. 2 is a perspective view of a retainer of the same embodiment, FIG. 3 is a sectional view taken along line XX of FIG. 1, and FIG. It is a YY line sectional view.

That is, as shown in FIG. 1, the airbag device of this embodiment has a retainer 4 arranged inside each of the side walls 3 of the airbag case 2 that defines the rectangular opening 1. The base of the airbag 5 is attached by sandwiching the airbag 5 with the side walls 3 and the airbag 5 is folded and housed in the opening 1 described above, and the airbag 5 is protected from the outside by an inner door. 6 is arranged in the case opening. The inner door 6 is made of an elastic material such as rubber, polyester, or ether elastomer, and when the device is in operation, the Y-shaped slit 7 is ruptured by the internal pressure of the inflator 8 and the airbag 5 pops out. ing. The popped-out airbag 5 breaks or pushes away the door D assembled to the instrument panel P as shown in FIG. 4 and inflates to the occupant side.

In this embodiment of the present invention, in the airbag device as described above, the four fixing portions 9 made of the same elastic material from the inner door 6 are connected to the outer surfaces of the pair of case side walls 3 facing each other. The airbag 10 and the case 2 are extended from the retainer 4 to the vicinity of the retainer 4, respectively, and a pin 10 is provided as a hooking protrusion, and the pin 10 is provided on the inner door 6. The inner door 6 is fixed to the airbag case 2 by hooking the fixing portion 9 of the inner door 6 into the hole 11.

As shown in FIG. 2, the retainer 4 has the engaging pins 10 and the bolts 12 alternately, and when the fixing portion 9 is not provided, the retainer 4 is provided by the bolts 12 (and nuts). The airbag 5, and the side wall 3 of the case are directly fixed.

As shown in FIG. 1, the inner door 6 has two ears 13 (one of which is omitted) formed from the other two sides not provided with the fixing portion 9, respectively. As shown in FIG. 4, the ear portion 13 is extended to a position where the airbag case 2 and the instrument panel P are fixed, and as shown in FIG. 4, a bolt 12 that fixes the case and the panel P is used. It is fixed together.

As shown in FIG. 3, the fixing portion 9 is extended from the flange portion 15 of the inner door 6 that covers the flange 14 of the case opening portion 1 bent in an L shape from the outside. The flange portion 15 continuously covers the flange 14 even where the fixing portion 9 is not provided.

On the other hand, FIGS. 5 and 6 show an example in which the retainer 4 is provided with an L-shaped cut-and-raised piece 16 in place of the engaging pin 10 of the previous embodiment, and FIGS. Similarly, an example in which the engaging pin 10 is replaced by a rivet 17 or a bolt (not shown) is shown. That is, in the present invention, whichever of the pin 10, the cut-and-raised piece 16, the rivet 17, or the bolt is used, the pin 10, the cut-and-raised piece 16, the rivet 17, or the bolt is projected from the retainer 4 to the outside of the case 2 to fix the inner door 6 or the fixed door. The inner door 6 is fixed to the airbag case 2 by utilizing the elasticity of the portion 9 to hook the holes 11 of the fixing portion 9 on these engaging projections. In this case, when the engaging projection is a bolt, it is desirable to perform a loosening prevention adhesion or the like when the nut is tightened. When the rivet is used, the air bag 5 and the case 2 are fixed by tightening the rivet after the fixing portion 9 is hooked.

In the airbag device of each embodiment of the present invention having the above-described structure, the elasticity of the fixing portion 9 or the inner door itself is utilized to pull the fixing portion 9 to form a hooking protrusion such as the pin 10. It is possible to easily attach the inner door 6 to the airbag case 2 with the retainer 4 by hanging it, and since it is not necessary to provide a dedicated mounting hole in the case as in the conventional case, it is troublesome. Also, the cost of the airbag device can be reduced by reducing the man-hours and the like without being restricted by the design due to the formation of this hole.

Further, by using the case 2 and the bolts 12 of the instrument panel P and the like to further tighten the inner door 6 together, the inner door 6 can be fixed more securely, and the bolts and the like described above can also be secured. The effect of reducing the number of bolts and the torque management man-hours at the time of tightening at the same time by reducing the number of bolts can also be achieved.

Further, in each of the above-described embodiments of the present invention, as shown in FIG. 1, the collar portion 15 and the ear portion 13 are interposed between the flange 14 of the airbag case 2 and the instrument panel P. Even when the inflator 8 of the airbag device is actuated and the case 2 is deformed so as to be inflated by the gas that is instantaneously ejected, the instrument panel P is inserted by the interposition of the collar portion 15 and the ear portion 13. Is not damaged by the case flange 14.

[0022]

[Effect of device]

 As described above, in the airbag device of the present invention, the base of the airbag is clamped and fixed to the case opening with the retainer, and the inner door that covers the folded and stored air bag is provided in the opening. In the device, the elastic fixing part is extended from the inner door to the vicinity of the retainer along the outer surface of the side wall of the case, and the airbag and the case are penetrated from the retainer to project the engaging projection. The inner door is fixed to the airbag case by hooking the hooking projections into the holes formed in the fixing portion of the inner door, and the elasticity of the fixing portion is utilized. The inner door can be easily attached to the case by the retainer by pulling the fixing part and hooking it on the hooking protrusion. As described above, since it is not necessary to provide a mounting-dedicated hole in the case, there is no restriction on the time and designing due to the formation of this hole, and the cost of the airbag device can be reduced by reducing the number of steps. In addition, the inner door is secured more securely by using the fasteners for the airbag case and the instrument panel, and by making the inner door co-tightened. In addition, the number of fasteners can be reduced by using the fasteners together, and the practical effect of simultaneously reducing the cost of the fasteners and the torque management man-hours at the time of fastening can be achieved.

[Brief description of drawings]

FIG. 1 is a cross-sectional perspective view showing an airbag device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a retainer of the same embodiment.

3 is a sectional view taken along line XX of FIG.

FIG. 4 is a sectional view taken along line YY of FIG.

FIG. 5 is a perspective view showing a retainer according to a second embodiment of the present invention.

FIG. 6 is a sectional view showing a fixing portion of the inner door of the embodiment.

FIG. 7 is a perspective view showing a retainer according to a third embodiment of the present invention.

FIG. 8 is a sectional view showing a fixing portion of the inner door of the embodiment.

FIG. 9 is a cross-sectional view showing a conventional airbag device and an inner door.

FIG. 10 is a schematic view of a conventional inner door.

[Explanation of symbols]

 1 Opening 2 Airbag Case 3 Case Sidewall 4 Retainer 5 Airbag 6 Inner Door 7 Slit 8 Inflator 9 Fixed Part 10 Pin 11 Hole 12 Bolt 13 Ear 14 Flange 15 Collar 16 Cut and Raised Piece 17 Rivet P Instrument Panel D Air Bag door

Front page continuation (72) Inventor Kazuaki Bito 3 Ikagayama, Uchikoshi, Miyoshi-cho, Nishikamo-gun, Aichi Toyo Tire & Rubber Co., Ltd. Automotive Parts Technology Center

Claims (5)

[Scope of utility model registration request] 1. A side wall of an airbag case defining an opening is attached to a side wall of the airbag case by a retainer arranged inside the case, and an airbag base is attached to the side wall, while the airbag is folded and stored in the opening. Also, in an airbag device in which an inner door for covering and protecting the airbag from the outside is arranged in the case opening, a fixing portion having elasticity from the inner door is provided along the outer surface of the case side wall in the vicinity of the retainer. While extending to the inner side, the airbag and the case are penetrated from the retainer to project a hooking projection, and the hooking projection is hooked in a hole formed in the fixing portion of the inner door, thereby An airbag device having an inner door, characterized in that the door is fixed to an airbag case. 2. The airbag device having an inner door according to claim 1, wherein the engaging projection is a pin fixed to a retainer. 3. The airbag apparatus having an inner door according to claim 1, wherein the engaging projection is a cut-and-raised piece formed by cutting and raising a retainer. 4. The airbag apparatus having an inner door according to claim 1, wherein the engaging projections are rivets or bolts for fixing the airbag, the airbag case, and the retainer. 5. A part of the inner door is extended to a fixed position of an airbag case and an instrument panel, and is provided so as to be integrally connected by a fastener for fixing the case and the panel. An airbag device including the inner door according to any one of 1 to 4.