A fixing structure of a gas generator

Abstract

This utility model discloses a fixing structure for a gas generator, comprising: a semi-circular fixing shell detachably mounted on an airbag support; a limiting baffle is provided on the left end of the semi-circular fixing shell, and a limiting constriction is formed on its right end, which cooperates with a limiting groove formed on the surface of the gas generator's outer shell; and a limiting snap-fit ​​piece located inside the semi-circular fixing shell, the limiting snap-fit ​​piece having a snap-fit ​​groove for fixing the excitation end of the gas generator; during installation, the gas generator is installed into the semi-circular fixing shell, the left end face of its excitation end abuts against the inner surface of the limiting baffle, the limiting groove of which cooperates with the limiting constriction of the semi-circular fixing shell for limiting, and one end of the airbag deflation strap extends between the limiting baffle and the limiting snap-fit ​​piece and is tied to the excitation end of the gas generator. The fixing structure of this utility model is easy to install, has better reliability, lower cost, and stronger versatility.

Description

Technical Field

[0001] This utility model relates to the field of automotive airbag technology, and in particular to a fixing structure for a gas generator. Background Technology

[0002] An airbag is a safety device in a car's passive restraint system that deploys instantaneously in the event of a collision to protect the occupants. The airbag itself, a crucial component, inflates with gas upon deployment, separating the occupants from the steering wheel or dashboard, thus protecting them. The airbag requires a very high gas pressure to deploy, providing some protection for occupants of normal weight and in a normal sitting position. However, due to the significant impact of deployment, it can easily injure lighter individuals or those with improper sitting postures, especially the driver and front-seat passengers.

[0003] Therefore, after the airbag deploys, in addition to ensuring that the activation device is secured, it is also necessary to ensure that the adaptive deflation port on the airbag can open in time to avoid injury to the occupants when the airbag deploys.

[0004] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a fixing structure for a gas generator to address the shortcomings of the prior art. This fixing structure can be used to fix the gas generator so that when the gas generator is not ignited, the gas bag deflation strap is not released and the adaptive deflation port is not opened; after the gas generator is ignited, the gas bag deflation strap is released and the deflation port is opened. The opening time of the adaptive deflation port on the gas bag is controlled to adjust the output pressure inside the gas bag, so as to avoid injury to passengers during the deployment of the gas bag.

[0006] The technical problem to be solved by this utility model can be achieved by the following technical solution: A fixed structure for a gas generator includes: A semi-circular fixing shell, detachably mounted on an airbag bracket, for enclosing and securing a gas generator. The left end of the semi-circular fixing shell is provided with a limiting baffle, and the right end has a limiting constriction that mates with a limiting groove formed on the surface of the gas generator's outer shell. A limiting snap-fit ​​piece is located inside the semi-circular fixed housing, and the limiting snap-fit ​​piece has a snap-fit ​​groove for fixing the excitation end of the gas generator; During installation, the gas generator is installed inside the semi-circular fixed housing, with the left end face of its excitation end abutting against the inner side of the limiting baffle. Its limiting groove cooperates with the limiting constriction of the semi-circular fixed housing to limit the position. One end of the gas bag degassing strap extends between the limiting baffle and the limiting snap-fit ​​piece and is tied to the excitation end of the gas generator.

[0007] In a preferred embodiment of this utility model, the left and right sides of the semi-circular fixed housing are provided with a first left mounting lug and a first right mounting lug, respectively. The first left mounting lug and the first right mounting lug are respectively provided with a first left mounting through hole and a first right mounting through hole. It also includes a housing mounting piece, the limiting snap-fit ​​piece is provided on the housing mounting piece, and the housing mounting piece is provided with a second left mounting through hole and a second right mounting through hole corresponding to the first left mounting through hole and the first right mounting through hole. During installation, the housing mounting piece is first placed on the airbag bracket, so that the second left mounting through hole and the second right mounting through hole are fitted into the left fixing screw and the right fixing screw of the airbag bracket. Then, the first left mounting through hole and the first right mounting through hole of the semi-circular fixed housing are fitted into the left fixing screw and the right fixing screw of the airbag bracket, so that the semi-circular fixed housing is located on the housing mounting piece. Then, the left fastening nut and the right fastening nut are tightened on the left fixing screw and the right fixing screw.

[0008] In a preferred embodiment of the present invention, a housing limiting groove is formed on the surface of the housing mounting plate that contacts the gas generator for limiting the surface of the outer shell of the gas generator.

[0009] In a preferred embodiment of this utility model, a second left mounting lug and a second right mounting lug are provided on the left and right sides of the semi-circular fixed housing. The second left mounting lug and the second right mounting lug are respectively provided with a third left mounting through hole and a third right mounting through hole. The limiting snap-fit ​​piece is disposed inside the semi-circular fixed housing. During installation, the semi-circular fixed housing is first placed on the airbag bracket, so that the third left mounting through hole and the third right mounting through hole of the semi-circular fixed housing are fitted into the left fixing screw and the right fixing screw of the airbag bracket. Then, the left fastening nut and the right fastening nut are tightened on the left fixing screw and the right fixing screw.

[0010] In a preferred embodiment of this utility model, the limiting snap-fit ​​piece is formed by folding a portion of the semi-circular fixing shell inward.

[0011] In a preferred embodiment of this utility model, the semi-circular fixed housing is made of sheet metal with a thickness of not less than 2mm.

[0012] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: This utility model can effectively fix the gas generator, and the pressure inside the gas bag can be adjusted by controlling the opening or closing of the adaptive vent hole of the gas bag according to the actual situation, so as to avoid injury to passengers with smaller weight or incorrect sitting posture during the deployment of the gas bag. The fixing structure of this utility model is simple to install, has better reliability, lower cost, and strong versatility. This utility model can increase the sheet metal thickness to accommodate different strap tensions. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0015] Figure 2 This is a schematic diagram of the installation of Embodiment 1 of this utility model on the airbag bracket.

[0016] Figure 3 This is a schematic diagram of Embodiment 1 of this utility model when the gas generator is not ignited.

[0017] Figure 4 This is a schematic diagram of Embodiment 1 of the present invention during the ignition of the gas generator.

[0018] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of this utility model. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. Example

[0020] See Figure 1 and Figure 2 and combined Figure 3 The figure shows a fixing structure for a gas generator, including a semi-circular fixing housing 100, a limiting snap-fit ​​piece 200, and a housing mounting piece 300.

[0021] A semi-circular fixed housing 100 is detachably mounted on the airbag bracket 10, which is used to cover and fix the gas generator 20. The semi-circular fixed housing 100 is made of sheet metal with a thickness of not less than 2 mm.

[0022] A limiting baffle 110 is provided on the left end of the semi-circular fixed housing 100, and a limiting constriction 120 is formed on its right end, which cooperates with the limiting groove 22 formed on the surface of the outer shell of the gas generator 20. A left mounting lug 130 and a right mounting lug 140 are provided on the left and right sides of the semi-circular fixed housing 100, and the left mounting lug 130 and the right mounting lug 140 are respectively provided with a left mounting through hole 131 and a right mounting through hole 141.

[0023] The limiting snap-fit ​​piece 200 is located inside the semi-circular fixed housing 100, and the limiting snap-fit ​​piece 200 has a snap-fit ​​groove 210 for fixing the excitation end 21 of the gas generator 20.

[0024] The housing mounting plate 300 is located below the semi-circular fixed housing 100 and is an arc-shaped plate. A limiting snap-fit ​​piece 200 is disposed on the housing mounting plate 300. The housing mounting plate 300 has a left mounting through hole 310 and a right mounting through hole 320 corresponding to the left mounting through hole 131 and the right mounting through hole 141, respectively. A housing limiting groove 330 is formed on the surface of the housing mounting plate 300 that contacts the gas generator 20. This groove is used to limit the surface of the outer housing of the gas generator 20 and prevent radial movement of the gas generator 20.

[0025] During installation, the gas generator 20 is installed inside the semi-circular fixed housing 100, with the left end face of its excitation end 21 abutting against the inner side of the limiting baffle 110. Its limiting groove 22 cooperates with the limiting constriction 120 of the semi-circular fixed housing 100 for limiting, while the locking groove 210 of the limiting snap-fit ​​piece 200 locks the laser end 21 of the gas generator 20, thereby covering and fixing the gas generator 20. Then, one end of the gas bag degassing strap 30 is extended between the limiting baffle 110 and the limiting snap-fit ​​piece 200 and tied to the excitation end 21 of the gas generator 20.

[0026] First, place the housing mounting plate 300 on the airbag bracket 10, so that the left mounting through hole 310 and the right mounting through hole 320 are fitted into the left fixing screw 11 and the right fixing screw 12 of the airbag bracket 10. Then, fit the left mounting through hole 131 and the right mounting through hole 141 of the semi-circular fixed housing 100 into the left fixing screw 11 and the right fixing screw 12 of the airbag bracket 10, so that the semi-circular fixed housing 100 is located on the housing mounting plate 300. Then, tighten the left fastening nut 13 and the right fastening nut 14 onto the left fixing screw 11 and the right fixing screw 12, thereby fixing the semi-circular fixed housing 100 and the housing mounting plate 300 on the airbag bracket 10.

[0027] When the gas generator 20 is not ignited, the ignition end 21 of the gas generator 20 will not retract. At this time, the gas bag deflation strap 30 is not released, and the adaptive exhaust port is closed (the exhaust cylinder is tightened). Figure 3 As shown. When the gas generator 20 is not ignited, the ignition end 21 of the gas generator 20 retracts, at which time the gas bag release strap 30 is released, and the adaptive exhaust port is in the open state (the exhaust cylinder is tightened), as shown. Figure 4 As shown, this is to prevent injury to passengers who are lighter or have poor posture during the deployment of the airbag. Example

[0028] The fixing structure in this embodiment is roughly the same as that in Embodiment 1, except that the housing mounting plate is omitted.

[0029] See Figure 5 A limiting baffle 110a is provided on the left end of the semi-circular fixed housing 100a, and a limiting constriction 120a is formed on its right end, which cooperates with the limiting groove formed on the surface of the outer shell of the gas generator. A left mounting lug 130a and a right mounting lug 140a are provided on the left and right sides of the semi-circular fixed housing 100a, respectively. The left mounting lug 130a and the right mounting lug 140a are respectively provided with a left mounting through hole 131a and a right mounting through hole 141a.

[0030] The limiting snap-fit ​​piece 200a is located inside the semi-circular fixed housing 100a. The limiting snap-fit ​​piece 200a has a snap-fit ​​groove 210a for fixing the excitation end of the gas generator. The limiting snap-fit ​​piece 200a is formed by folding a part of the semi-circular fixed housing 110a inward.

[0031] During installation, first place the semi-circular fixed housing 100a on the airbag bracket, so that the left mounting through hole 131a and the right mounting through hole 141a of the semi-circular fixed housing 100a fit into the left fixing screw and the right fixing screw of the airbag bracket, and then tighten them onto the left fixing screw and the right fixing screw using the left fastening nut and the right fastening nut.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fixing structure for a gas generator, characterized in that, include: A semi-circular fixing shell, detachably mounted on an airbag bracket, for enclosing and securing a gas generator. The left end of the semi-circular fixing shell is provided with a limiting baffle, and the right end has a limiting constriction that mates with a limiting groove formed on the surface of the gas generator's outer shell. A limiting snap-fit ​​piece is located inside the semi-circular fixed housing, and the limiting snap-fit ​​piece has a snap-fit ​​groove for fixing the excitation end of the gas generator; During installation, the gas generator is installed inside the semi-circular fixed housing, with the left end face of its excitation end abutting against the inner side of the limiting baffle. Its limiting groove cooperates with the limiting constriction of the semi-circular fixed housing to limit the position. One end of the gas bag degassing strap extends between the limiting baffle and the limiting snap-fit ​​piece and is tied to the excitation end of the gas generator.

2. The fixing structure of the gas generator as described in claim 1, characterized in that, The semi-circular fixed housing is provided with a first left mounting lug and a first right mounting lug on its left and right sides, respectively. The first left mounting lug and the first right mounting lug are respectively provided with a first left mounting through hole and a first right mounting through hole. It also includes a housing mounting piece, on which the limiting snap-fit ​​piece is disposed. The housing mounting piece is provided with a second left mounting through hole and a second right mounting through hole corresponding to the first left mounting through hole and the first right mounting through hole. During installation, the housing mounting piece is first placed on the airbag bracket, so that the second left mounting through hole and the second right mounting through hole are fitted into the left fixing screw and the right fixing screw of the airbag bracket. Then, the first left mounting through hole and the first right mounting through hole of the semi-circular fixed housing are fitted into the left fixing screw and the right fixing screw of the airbag bracket, so that the semi-circular fixed housing is located on the housing mounting piece. Then, the left fastening nut and the right fastening nut are tightened on the left fixing screw and the right fixing screw.

3. The fixing structure of the gas generator as described in claim 2, characterized in that, The surface of the housing mounting plate that contacts the gas generator has a housing limiting groove for limiting the surface of the gas generator's outer shell.

4. The fixing structure of the gas generator as described in claim 1, characterized in that, The semi-circular fixed housing is provided with a second left mounting lug and a second right mounting lug on its left and right sides, respectively. The second left mounting lug and the second right mounting lug are respectively provided with a third left mounting through hole and a third right mounting through hole. The limiting snap-fit ​​piece is disposed inside the semi-circular fixed housing. During installation, the semi-circular fixed housing is first placed on the airbag bracket, so that the third left mounting through hole and the third right mounting through hole of the semi-circular fixed housing are fitted into the left fixing screw and the right fixing screw of the airbag bracket. Then, the left fastening nut and the right fastening nut are tightened on the left fixing screw and the right fixing screw.

5. The fixing structure of the gas generator as described in claim 4, characterized in that, The limiting latch is formed by folding a portion of the semi-circular fixed housing inward.

6. The fixing structure of the gas generator as described in any one of claims 1 to 5, characterized in that, The semi-circular fixed housing is made of sheet metal with a thickness of not less than 2mm.

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