Gas bag restraining device

• US 20020084631A1
• Filed: 12/26/2001
• Published: 07/04/2002
• Est. Priority Date: 12/28/2000
• Status: Active Grant

• Current Assignee: TRW Automotive Safety Systems GmbH & Co. KG
• Original Assignee: TRW Automotive Safety Systems GmbH & Co. KG
• Inventors: Lorenz, Christian, Derrick, John-Oliver, Bieber, Udo
• Granted Patent: US 6,786,504 B2
• Time in Patent Office: Days
• US Class Current: 280/728.2
• CPC Class Codes: B60R 2021/21543 with emblems
• CPC Class Codes: B60R 21/215 characterised by the covers for the inflatable member B60R21/2176 takes precedence
• 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
• CPC Class Codes: B60R 21/231 characterised by their shape, construction or spatial configuration

Abstract

The invention relates to a gas bag restraining device comprising a gas bag module which has a gas bag with a front wall upon which an occupant to be restrained can impact in a case of restraint. The front wall has a depression which is produced in that a center portion of the front wall is attached to the module and is prevented from moving when the gas bag is inflated. The gas bag restraining device further comprises a module cover closing a ring-shaped outlet opening of the gas bag module. The module cover has a central hole which is covered by a cap which is stationary during opening of said gas bag module. The module cover has an edge defining the central hole and opens, preferably tears, towards outside starting from the edge. A holding connection is provided between the edge and the cap which is released when said gas bag module is opened.

Claims

1. A gas bag restraining device, comprising

a gas bag module which has a gas bag with a front wall upon which an occupant to be restrained can impact in a case of restraint, said front wall having a depression which is produced in that a center portion of said front wall is attached to said module and is prevented from moving when said gas bag is inflated, said gas bag restraining device further comprising a module cover closing a ring-shaped outlet opening of said gas bag module,

said module cover having a central hole which is covered by a cap which is stationary during opening of said gas bag module,

said module cover having an edge defining said central hole and,

a holding connection being provided between said edge and said cap which is released when said gas bag module is opened so that said module cover opens towards outside starting from said edge.

2. The gas bag restraining device as claimed in claim 1, wherein said holding connection is a form-fitting connection.

3. The gas bag restraining device as claimed in claim 2, wherein said cap makes a tongue-and-groove joint with said edge.

4. The gas bag restraining device as claimed in claim 1, wherein said edge is clamped between an underside of said cap and a part of said module to which said cap is attached.

5. The gas bag restraining device as claimed in claim 1, wherein said edge has a projection extending towards an underside of said cap, with which said edge rests against said underside of said cap.

6. The gas bag restraining device as claimed in claim 5, wherein, in a region of said projection, said underside has a recess which is preferably complementary to said projection.

7. The gas bag restraining device as claimed in claim 1, wherein said module cover consists of opposing flap portions having a parting joint where said flap portions are connected with each other in a form-fitting manner.

8. The gas bag restraining device as claimed in claim 1, wherein at least two opposing flap portions are provided which are swiveling towards outside when opening said gas bag module and which in sections engage on the one hand said cap and on the other hand engage each other in a form-fitting manner.

9. The gas bag restraining device as claimed in claim 1, wherein said module cover has an end wall and a side wall, said end wall being clamped at a transition to said side walls.

10. The gas bag restraining device as claimed in claim 9, wherein in a region of said clamping a hinge is formed which defines a swivel axis for said flap portion of said end wall.

11. The gas bag restraint device as claimed in claim 1, wherein said module cover is opened by tearing.