Airbag fastening system

• US 20090020985A1
• Filed: 07/11/2008
• Published: 01/22/2009
• Est. Priority Date: 01/13/2006
• Status: Active Grant

• Current Assignee: Takata-Petri AG
• Original Assignee: Takata-Petri AG
• Inventors: Sauer, Frank
• Granted Patent: US 7,740,268 B2
• Time in Patent Office: Days
• US Class Current: 280/728.200
• CPC Class Codes: B60R 21/203 in steering wheels or steering columns
• CPC Class Codes: B60R 21/217 Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together

Abstract

An airbag fastening system in an airbag module has a clamping connection and includes a retaining ring for an injection orifice of the airbag in an airbag receptacle surrounding both the airbag module and the retaining ring. The retaining ring has a reducing width on an outer face in a main pulling direction when the airbag unfolds. At least a portion of the airbag receptacle or a component associated with the airbag receptacle has a smaller width above the retaining ring than a greatest width of the retaining ring. A lower end of the airbag forms the injection orifice, is folded over the retaining ring, and extends between the retaining ring and the airbag receptacle or the component. The retaining ring includes at least one portion having a conically tapered cross-section on the outer face in the main pulling direction when the airbag unfolds.

Claims

1. An airbag fastening system in an airbag module having a clamping connection, the airbag fastening system comprising:

a retaining ring for an injection orifice of the airbag in an airbag receptacle surrounding both the airbag module and the retaining ring, the retaining ring having a reducing width on an outer face in a main pulling direction when the airbag unfolds, at least a portion of the airbag receptacle or a component associated with the airbag receptacle having a smaller width above the retaining ring than a greatest width of the retaining ring,

wherein a lower end of the airbag forms the injection orifice, is folded over the retaining ring, and extends between the retaining ring and the airbag receptacle or the component, and

wherein the retaining ring comprises at least one portion having a conically tapered cross-section on the outer face in the main pulling direction when the airbag unfolds, a portion of an inner wall of the airbag receptacle or the component being associated with and extending at least approximately in the same direction as the at least one portion.

2. The airbag fastening system as claimed in claim 1, wherein the retaining ring is circular, rectangular, or oval.

3. The airbag fastening system as claimed in claim 1, wherein the component of the airbag receptacle associated with the retaining ring is configured as at least one separate component that may be inserted into the airbag receptacle with the airbag after arranging the retaining ring.

4. The airbag fastening system as claimed in claim 3, wherein the component may be latched to the airbag receptacle.

5. The airbag fastening system as claimed in claim 3, wherein the component is configured as a ring.

6. The airbag fastening system as claimed in claim 3, wherein the component comprises latching hooks with which grooves in the airbag receptacle are associated.

7. The airbag fastening system as claimed in claim 6, wherein the latching hooks are configured as separate hooks that are spaced apart from one another.

8. The airbag fastening system as claimed in claim 6, wherein the latching hooks have an annular configuration.

9. The airbag fastening system as claimed in claim 1, wherein the airbag receptacle has an opening on one side that may be closed by a cover.

10. The airbag fastening system as claimed in claim 9, wherein an inner wall of the cover has the same path as an opposing wall of the airbag receptacle.

11. The airbag fastening system as claimed in claim 2, wherein the retaining ring is circular and the airbag receptacle and retaining ring comprise portions allowing fastening of the retaining ring in the airbag receptacle in the manner of a bayonet closure.

12. The airbag fastening system as claimed in claim 1, wherein the injection orifice of the airbag has a tubular configuration.

13. An airbag module comprising:

an airbag including an injection orifice;

an airbag receptacle;

a retaining ring for the injection orifice, the retaining ring having a reducing width on an outer face in a main pulling direction when the airbag unfolds,

wherein at least a portion of the airbag receptacle has a smaller width above the retaining ring than a greatest width of the retaining ring;

wherein a lower end of the airbag forms the injection orifice and is folded over the retaining ring and extends between the retaining ring and the airbag receptacle; and

wherein the retaining ring includes a portion having a conically tapered cross-section on the outer face in the main pulling direction when the airbag unfolds, a portion of an inner wall of the airbag receptacle extending at least approximately in the same direction as the at least one portion.