JPH0618111U - Airbag device - Google Patents

Abstract

(57) [Abstract] [Purpose] In an airbag device for a passenger seat, by improving the mounting structure of the inflator and the airbag case, the head of the inflator is securely fixed to the case, and the rattling of the head is caused. It is possible to prevent abnormal noise from being generated and to secure a path for the harness of the inflator to protect the harness. [Structure] An inflator head 11 protruding from a case side wall 5 is fitted and held, and a harness 1 of an inflator 4 is provided.
4 is provided with a bowl-shaped flexible inflator cover 16 having a harness coating portion 15 that covers the inflator cover 16.
Is fitted to the inflator head 11 and fixed to the side wall of the case, and the inflator heads 8 and 11 are locked by the elastic holding force of the cover 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an airbag device equipped on a vehicle, which automatically inflates in the event of a vehicle collision and protects an occupant, and more specifically, an airbag case and an inflator mounting structure of a passenger seat device. It is about improvement.

[0002]

[Prior art]

 An airbag device is a safety device that protects an occupant by inflating the bag instantaneously as an aid to the seat belt when the impact is more than a predetermined value when the vehicle collides, and is usually a gas generator. A bag that is inflated by the gas of the inflator, and an airbag case that encloses the inflator together with the bag in a substantially airtight manner. When the airbag apparatus operates, the gas instantly ejected from the inflator fills the airbag case and the airbag to generate an internal pressure, and the internal pressure causes the bag to expand.

On the other hand, the above-mentioned airbag device has been developed not only for the driver's seat but also for the passenger seat in recent years. Such an airbag device has a substantially U-shaped cross section and an opening of the case. It is generally provided with an airbag that is folded and housed in a portion and a cylindrical inflator that is fixed in the case behind the airbag.

The inflator is usually attached to the airbag case by providing an insertion hole in one of the side walls of the case so that the head of the inflator can be fitted and the other side facing the side wall. This is done by inserting a stud bolt protruding axially from the end edge of the foot of the inflator through the side wall of the inflator and tightening this bolt with a nut.

[0005]

[Problems to be solved by the device]

 However, with the conventional inflator mounting structure described above, even if the foot portion can be securely fixed to the airbag case, on the head side, due to the reasons in the assembly process, the diameter of the head portion is not changed. On the other hand, since the insertion hole of the side wall is provided to be slightly large, there is a disadvantage that the head of the inflator vibrates in the gap between the head of the inflator and the insertion hole to generate an abnormal noise when the vehicle is traveling. In addition, although the harness connected to the ignition device extends from the top of the head of the inflator, in the conventional mounting structure, the harness cooperates with the vibration of the inflator and the peripheral parts are connected. The peripheral parts may rub against each other, and the friction between the peripheral parts and the harness may cause abnormal noise.

The present invention has dealt with the above situation and found a new structure in the mounting structure of the inflator and the airbag case, so that the head of the inflator is securely fixed to the case, and the rattling of the rattle occurs. The purpose of the invention is to prevent the generation of abnormal noise due to such reasons as well as to secure the route of the harness and protect the harness.

[0007]

[Means for Solving the Problems]

 That is, the feature of the airbag device of the present invention which meets the above-mentioned object is that the head part of the inflator is fitted into the side wall of the case, and the bolt of the foot part is passed through the other side wall and fastened. The inflator head is projected to the outside of the case as required, and a cover body is fitted to the protruding inflator head and holds the inflator head, and a harness covering portion for covering a harness extending from the top of the head. An inflator cover made of a flexible resin is provided, the inflator cover is fitted to the inflator head and fixed to the side wall of the case, and the inflator head is locked by the elastic holding force of the cover. is there.

[0008]

[Action]

 In the air bag device of the present invention having the above structure, the head of the inflator is locked in the air bag case by the elastic holding force of the inflator cover fixed to the side wall of the case. The head does not vibrate or rattle, so that the generation of the abnormal noise resulting therefrom is completely prevented. Further, since the vibration of the head of the inflator is prevented, the harness is also prevented from cooperating, thereby preventing abnormal noise from the harness and securing the path of the harness by the harness covering portion of the cover. As a result, it is possible to prevent the contact between the harness and other members, which is likely to occur when installing the airbag device, and to protect the joint portion with the inflator, which is particularly susceptible.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a horizontal sectional view showing an airbag apparatus according to an embodiment of the present invention, FIG. 2 is a partially enlarged sectional view showing the vicinity of an inflator head of the embodiment, and FIG. 3 is an exploded perspective view thereof. , An airbag case (1) having an approximately U-shaped (or U-shaped) cross section and made of an elastic material such as a thin cold-rolled steel plate, and a folding storage in an opening (2) of the case (1). And an inflator (4) fixed inside the airbag case (1) behind the airbag.

Further, the inflator (4) and the airbag case (1) are basically mounted by providing an insertion hole (7) in one of the opposite side walls (5) of the case (1). ) Is inserted and the other side wall (6) of the case is provided with a bolt hole (12) to axially project on the foot (9) of the inflator (4). It has a structure in which a bolt (10) is penetrated and tightened.

On the other hand, as shown in the drawings, in the embodiment of the present invention, the head (8) of the inflator (4) is a large-diameter portion (11), and the required height is projected outside the case (1). On the other hand, a bowl-shaped cover body (13) which fits into the large diameter portion (11) and holds the large diameter portion (11), and a harness (which extends from the top of the large diameter portion (11) ( An inflator cover (16) integrally provided with a semi-cylindrical harness covering portion (15) for covering 14) is provided.

The inflator cover (16) is made of a flexible synthetic resin such as nylon, and is provided with ribs (17) as shown in FIG. . As shown in the figure, the rib (17) has a taper shape which becomes higher as it goes deeper into the cover (16). By utilizing this taper shape, a large diameter portion ( 11) can be held without a gap. In the embodiment of the present invention, as shown in FIGS. 1 and 2, the inflator cover (16) is fitted to the large diameter portion (11) of the head of the inflator (4) and the cover (16) of the inflator (16) is attached. The inflator harness (14) is housed in the harness covering part (15) and fixed to the case side wall (5) with rivets (18), and the elastic holding force of the cover (16) causes the head of the inflator (4) to be held. (8) is held against Case (1).

Therefore, in the embodiment of the present invention having the above structure, the head (8) of the inflator (4) is elastically retained by the inflator cover (16) fixed to the side wall (5) of the case, so that Since it is restrained by the airbag case (1), it does not vibrate or rattling with respect to the case unlike the head of a conventional inflator. Therefore, it is caused by this. The conventional abnormal noise is prevented from occurring.

Further, by preventing the vibration of the inflator head (8), the co-operation of the harness (14), which has been conventionally caused by the vibration, is also stopped, whereby the noise caused by the vibration of the harness is generated. Of the harness (14) and the other members that tend to occur when the airbag device is attached, etc., because the path of the harness (14) is secured by the harness covering portion (15) of the cover (16). It is possible to prevent contact with the inflator (4) and protect the joint portion of the harness (14) with the inflator (4), which is particularly susceptible to damage.

[0015]

[Effect of device]

 As described above, the airbag device of the present invention is a device in which the head of the inflator is fitted into the side wall of the case, and the bolt of the foot portion is passed through the other side wall and fastened. A flexible inflator cover is provided which holds and holds the inflator head projecting from the case side wall, and has a harness covering portion that covers the harness of the inflator. The inflator cover is fitted to the inflator head, and the case side wall is provided. The head of the inflator is restrained in the airbag case by the elastic holding force of the inflator cover to prevent the vibration of the head, which is the case with the conventional inflator head. It prevents the generation of abnormal noise due to interference, and also suppresses the co-action of the harness caused by the above-mentioned vibration, resulting in abnormal noise caused by the vibration of the harness. Preventing further to ensure a path of the harness by the harness cover section, in which exhibits a remarkable effect of the allowed to protect the harness prevent contact between the harness and the other member.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view showing an airbag device of the present invention.

FIG. 2 is a horizontal sectional view showing the vicinity of the inflator head of the embodiment.

FIG. 3 is an exploded perspective view of the same.

[Explanation of symbols]

 (1) Airbag case (2) Opening (3) Airbag (4) Inflator (5) Side wall (6) Side wall (7) Insertion hole (8) Inflator head (9) Inflator foot (10) Stud bolt (11) Large diameter part of head (12) Bolt hole (13) Inflator cover body (14) Harness (15) Harness cover (16) Inflator cover (17) Rib (18) Rivet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Yamaji 3rd Ikuyama, Uchikoshi, Miyoshi-cho, Nishikamo-gun, Aichi Prefecture Toyo Tire & Rubber Co., Ltd. Automotive Parts Technology Center (72) Toru Ozaki Nishikamo-gun, Aichi Prefecture 3 Yoshigayama, Uchikoshi, Miyoshi Town Toyo Tire & Rubber Co., Ltd. Automotive Parts Technology Center

Claims (1)

[Scope of utility model registration request] 1. An inflator head having an airbag case having a substantially U-shaped cross section and a tubular inflator fixed in the case, wherein an insertion hole is provided in one of opposite side walls of the case. In the airbag device in which the stud bolts provided in the foot portion of the inflator are passed through and fastened to the other side wall of the case, the inflator head is required to protrude outside the case. A cover body fitted to the protruding inflator head for holding the inflator head and a harness covering portion covering a harness extending from the top of the head are provided with a flexible resin inflator cover, The inflator cover
An airbag device characterized in that it is fitted to the inflator head and fixed to a side wall of the case, and the head of the inflator is restrained by the elastic holding force of the cover.