Air bag module structure and method of assembly

• US 5,388,858 A
• Filed: 02/25/1991
• Issued: 02/14/1995
• Est. Priority Date: 02/25/1991
• Status: Expired due to Fees

• Current Assignee: TRW Inc. (Northrop Grumman Corporation)
• Original Assignee: TRW Inc. (Northrop Grumman Corporation)
• Inventors: Cuevas, Jess A.
• Primary Examiner(s): Tyson, Karin L.
• Application Number:
  US07/661,102
• Time in Patent Office: 1,450 Days
• Field of Search: 280/728, 280/731, 280/732, 280/741, 280/743, 280/736, 280/728 R, 280/743 R, 280/730 R, 280/728 A, 403/274, 403/283, 403/284, 29/513, 29/515
• US Class Current: 280/728.2
• CPC Class Codes: B60R 21/2035 using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit steering wheel covers with tear lines B60R21/21656; assembling of modules B60R21/217
• 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

A vehicle air bag module is designed to be simply and efficiently assembled, without the use of fasteners such as bolts or rivets. The module is formed by a housing member and a retainer member. Each of the housing member and the retainer member includes integral structure enabling them to be coupled together without the use of additional fasteners such as bolts or rivets. When coupled together, the housing member and the retainer member are adapted to (i) capture and align an inflator in the housing member and (ii) capture and retain the mouth of an air bag in the housing member. Moreover, the air bag module is designed with additional connecting structure which enables the module to be coupled with a vehicle.

Claims

1. A vehicle air bag module structure comprising:

a housing member defining a cavity; and

a retainer member disposed in said cavity,

said housing member including a plurality of separate deformable portions deformed into engagement with a selected portion of said retainer member to couple said retainer member to said housing member,

said retainer member and housing member being adapted to capture and retain selected portions of an air bag and an inflator within said cavity in said housing member.

2. A vehicle air bag module structure as set forth in claim 1, wherein said plurality of separate deformable portions of said housing member are adapted to be bent into engagement with said selected portion of said retainer member to couple said housing member with said retainer member.

3. A vehicle air bag module structure as set forth in claim 2, wherein said housing member includes an annular side wall and said plurality of separate deformable portions of said housing member comprise a plurality of bendable locking tabs, each of said bendable locking tabs being bent out of the annulus of said annular side wall and into engagement with said selected portion of said retainer member.

4. A vehicle air bag module structure as set forth in claim 3, wherein said retainer member comprises an annular retainer ring dimensioned to be disposed closely adjacent said annular side wall of said housing member.

5. A vehicle air bag module structure as set forth in claim 4, wherein said selected portion of said retainer member includes an annular locking recess.

6. A vehicle air bag module structure as set forth in claim 5, wherein said retainer member also includes an annular air bag recess disposed in facing relation to said annular side wall of said housing member, said annular air bag recess and said annular side wall being adapted to co-operate to capture and retain a selected portion of an air bag in said cavity in said housing member.

7. A vehicle air bag module structure as set forth in claim 6, wherein said retainer member and said housing member have respective inflator wall surfaces adapted to capture and retain the inflator therebetween.

8. A vehicle air bag module structure as set forth in claim 7, wherein said retainer member is adapted to align an inflator in a predetermined orientation in said housing member.

9. A vehicle air bag module structure as set forth in claim 7, wherein said retainer member has an inner surface and an outer surface, said air bag recess and said locking recess being formed by said outer surface, and said inflator wall surface of said retainer member being formed by said inner surface of said retainer member.

10. A vehicle air bag module structure as set forth in claim 9, further including a cover forming a closure for said cavity in said housing member, said cover being secured to said housing member by means of a deformable element.

11. A vehicle air bag module structure as set forth in claim 10, wherein said deformable element comprises a strip of flexible material.

22. A vehicle air bag module structure as set forth in claim 3, wherein said annular sidewall includes a plurality of bendable locking tabs separated by non-bendable portions of said sidewall.

12. A method for forming a vehicle air bag module structure comprising the steps of:

locating an inflator in a cavity formed in a housing member;

locating a retainer member in the cavity in the housing member and capturing the inflator in the cavity between a portion of the retainer member and a portion of the housing member; and

deforming selected separate portions of the housing member into engagement with a selected portion of said retainer member to couple the housing member with the retainer member, thereby retaining the inflator in the cavity in the housing member.

13. A method as set forth in claim 12, further comprising the step of preassembling selected separate portions of an air bag with said retainer member before said retainer member is located in the housing member, and wherein the step of locating a retainer member in the cavity includes capturing the selected portion of the air bag between the retainer member and a portion of the housing member.

14. A method as set forth in claim 12, wherein the step of deforming selected separate portions of the housing member into engagement with a selected portion of the retainer member comprises bending the selected separate portions of the housing member into engagement with the selected portion of the retainer member.

15. A method as set forth in claim 14, wherein the housing member includes a plurality of deformable locking members formed in one piece with the housing member, and the step of deforming the selected separate portions of the housing member comprises simultaneously deforming the plurality of deformable locking members into engagement with the selected portion of the retainer member.

16. A method for forming a vehicle air bag module structure comprising the steps of:

preassembling a selected portion of an air bag with a retainer member;

locating the retainer member in a cavity formed in a housing member and capturing the air bag in the cavity between a portion of the retainer member and a portion of the housing member; and

deforming selected separate portions of the housing member into engagement with a selected portion of said retainer member to couple the housing member with the retainer member, thereby retaining the air bag in the cavity in the housing member.

17. A method as set forth in claim 16, wherein the step of deforming selected separate portions of the housing member into engagement with a selected portion of the retainer member comprises bending the selected separate portions of the housing member into engagement with the selected portion of the retainer member.

18. A method as set forth in claim 17, wherein the housing member includes a plurality of deformable locking members formed in one piece with the housing member, and the step of deforming the selected separate portions of the housing member comprises simultaneously deforming the plurality of deformable locking members into engagement with the selected portion of the retainer member.

19. A vehicle air bag module structure comprising:

a housing member defining a cavity, said housing member including an annular sidewall; and

an annular retainer ring disposed in said cavity closely adjacent said annular sidewall of said housing member,

said housing member including a plurality of bendable locking tabs, each of said bendable locking tabs adapted to be bent out of the annulus of said annular sidewall and into engagement with a selected portion of said annular retainer ring to couple said annular retainer ring to said housing member,

said annular retainer ring and housing member being adapted to capture and retain selected portions of an air bag and an inflator within said cavity within said housing member, and

further including coupling structure formed in one piece with said annular retainer ring, said coupling structure projecting out of said housing member and adapted to enable said retainer ring to be coupled to a portion of a vehicle.

20. A method for forming a vehicle air bag module structure comprising the steps of:

locating an inflator in a cavity formed in a housing member;

locating a retainer member in the cavity in the housing member and capturing the inflator in the cavity between a portion of the retainer member and a portion of the housing member, said retainer member including coupling structure projecting out of said housing member and adapted to enable said retainer member to be coupled to a portion of a vehicle; and

deforming a selected portion of the housing member into engagement with a selected portion of said retainer member to couple the housing member with the retainer member, thereby retaining the inflator in the cavity in the housing member.

21. A method for forming a vehicle air bag module structure comprising the steps of:

preassembling a selected portion of an air bag with a retainer member;

locating the retainer member in a cavity formed in a housing member and capturing the air bag in the cavity between a portion of the retainer member and a portion of the housing member, said retainer member having coupling structure projecting out of said housing member and adapted to enable said retainer member to be coupled to a portion of a vehicle; and

deforming a selected portion of the housing member into engagement with a selected portion of said retainer member to couple the housing member with the retainer member, thereby retaining the air bag in the cavity in the housing member.