Airbag module

• US 8,113,537 B2
• Filed: 11/30/2010
• Issued: 02/14/2012
• Est. Priority Date: 06/02/2008
• Status: Active Grant

• Current Assignee: Joyson Safety Systems Germany GmbH (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Takata-Petri AG
• Inventors: Sahm, Norbert, Kempe, Christian, Fechner, Tobias
• Primary Examiner(s): Brown, Drew
• Application Number:
  US12/957,161
• Publication Number:
  US 20110068563A1
• Time in Patent Office: 441 Days
• Field of Search: 280/740, 280/728.2, 280/741
• US Class Current: 280/728.2
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence
• CPC Class Codes: B60R 21/26 characterised by the inflation fluid source or means to control inflation fluid flow arrangement or mounting thereof to the vehicle B60R21/20; blasting cartridges for producing gas under pressure in general F42B3/04; initiators or igniters therefor F42B3/10
• CPC Class Codes: B60R 21/261 with means other than bag structure to diffuse or guide inflation fluid
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

An airbag module with a gas generator, airbag, diffuser and with an airbag module housing, in particular for carrying the gas generator and the airbag is provided. The diffuser is designed as a component partially fitting tightly at the ends thereof against the gas generator, whereby the diffuser extends in the region of the gas outlet openings of the gas generator at a distance from the gas generator. The airbag module housing has in the region of the ends of the gas generator contact surfaces for the gas generator, whereby dented sections of the airbag module housing are provided as contact surfaces. The gas generator is clamped between the diffuser and the airbag module housing for arranging the gas generator on the airbag module housing, whereby the contact surfaces form first clamping points fitting against the gas generator for clamping the gas generator on the airbag module housing.

Claims

1. An airbag module comprising:

a gas generator having ends and gas outlet openings;

an airbag;

a diffuser having ends; and

an airbag module housing for carrying the gas generator and the airbag,

wherein the diffuser extends in a region of the gas outlet openings of the gas generator at a distance from the gas generator,

wherein the airbag module housing has in a region of the ends of the gas generator contact surfaces for the gas generator,

wherein dented sections of the airbag module housing are provided as the contact surfaces,

wherein the gas generator is clamped between the diffuser and the airbag module housing such that the gas generator is arranged on the airbag module housing,

wherein the contact surfaces form first clamping points fitting against the gas generator for clamping the gas generator on the airbag module housing,

wherein the diffuser is designed as a tube and the gas generator is designed as a tubular gas generator, and

wherein said diffuser fits tightly at the ends thereof against the gas generator and is designed between the ends of the diffuser such that an annular gap is located between the gas generator and the diffuser.

2. The airbag module according to claim 1, wherein the ends of the diffuser are axial ends, wherein the diffuser is made of metal, wherein lateral ends of the metal overlap during assembly on the gas generator such that the overlapping lateral ends are fixed by at least one first securing element.

3. The airbag module according to claim 2, wherein the at least one first securing element is designed for fixing the gas generator and the airbag to the airbag module housing via at least one second securing element.

4. The airbag module according to claim 1, wherein a first securing element and a second securing element are provided on the respective ends of the diffuser fitting against the gas generator.

5. The airbag module according to claim 3, wherein the first securing element is formed by a pin and the second securing element is formed by a nut.

6. The airbag module according to claim 5, wherein the nut is tightened such that the diffuser pushes the gas generator via the first clamping point against the second clamping point.

7. The airbag module according to claim 1, wherein, on the respective ends of the diffuser, a second clamping point fitting against the gas generator is formed whereby the respective second clamping point corresponds to a corresponding first clamping point and faces the corresponding first clamping unit such the respective second clamping point and its corresponding first clamping point are arranged on both sides of the gas generator.

8. The airbag module according to the claim 1, wherein the gas generator is clamped on the airbag module housing at each of the ends of the gas generator between a respective first clamping point and a corresponding second clamping point.

9. The airbag module according to claim 1, wherein, on the respective ends of the diffuser adjacent to the respective contact surfaces, one first securing element and a corresponding second securing element are provided which interact with each other such that the diffuser pushes the gas generator over the first clamping point via the first clamping point against the second clamping point.

10. The airbag module according to claim 1, wherein the diffuser is arranged in the airbag.

11. A method for assembling a diffuser for an airbag module according to claim 1, comprising:

first thermoforming a metal designated for production of the diffuser in a section, and

subsequently rolling up the metal into cylinder,

wherein, after the assembly of the diffuser, the annular gap between the gas generator and the diffuser is provided.

12. An airbag module comprising:

a gas generator having ends and gas outlet openings;

an airbag;

a diffuser having ends; and

an airbag module housing for carrying the gas generator and the airbag,

wherein the diffuser is designed as a component partially fitting tightly against the gas generator at the ends of the diffuser,

wherein the diffuser extends in a region of the gas outlet openings of the gas generator at a distance from the gas generator,

wherein the airbag module housing has in a region of the ends of the gas generator contact surfaces for the gas generator,

wherein dented sections of the airbag module housing are provided as the contact surfaces,

wherein the gas generator is clamped between the diffuser and the airbag module housing such that the gas generator is arranged on the airbag module housing,

wherein the contact surfaces form first clamping points fitting against the gas generator for clamping the gas generator on the airbag module housing,

wherein the ends of the diffuser are axial ends, wherein the diffuser is made of metal, and wherein lateral ends of the metal overlap during assembly on the gas generator such that the overlapping lateral ends are fixed by at least one securing element.