POLE MEMBER FOR A PYROTECHNICAL IGNITER OF AN INFLATOR, IGNITER, INFLATOR AND AIRBAG MODULE COMPRISING SAID POLE MEMBER

• US 20150171541A1
• Filed: 11/24/2014
• Published: 06/18/2015
• Est. Priority Date: 12/11/2013
• Status: Active Grant

• Current Assignee: TRW Airbag Systems GmbH (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Airbag Systems GmbH (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Koller, Desiree, Isenmann, Uta, Esau, Anja
• Granted Patent: US 9,455,519 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60R 2021/26029 Ignitors
• CPC Class Codes: B60R 21/264 using instantaneous generation of gas, e.g. pyrotechnic B60R21/268 takes precedence
• CPC Class Codes: H01R 13/405 Securing in non-demountable manner, e.g. moulding, riveting
• CPC Class Codes: H01R 13/5202 Sealing means between parts of housing or between housing part and a wall, e.g. sealing rings

Abstract

The invention relates to a pole member (11) as prefabricated subassembly for a pyrotechnical igniter (10), especially for an inflator comprising two electrically conductive contact pins (14) embedded in an injection-molded part (13), wherein a fixing member (20) for anchoring the pole member (11) in the inflator is embedded in the injection-molded part (13), wherein the contact pins (14) extend through a through-hole (21) of the fixing member (20) and wherein one or more sealing components (32) are formed or arranged in or on the fixing member (20). Furthermore, the invention relates to an igniter, an inflator and an airbag module comprising such pole member.

Claims

1. A pole member (11) as prefabricated subassembly for a pyrotechnical igniter (10), especially for an inflator comprising two electrically conductive contact pins (14) embedded in an injection-molded part (13), wherein a fixing member (20) for anchoring the pole member (11) in the inflator is embedded in the injection-molded part (13), wherein the contact pins (14) extend through a through-hole (21) of the fixing member (20) and wherein one or more sealing components (32) are formed or arranged in or on the fixing member (20).

2. The pole member (11) according to claim 1, wherein the injection-molded part (13) includes or consists of a plastic material, especially polyphenylene sulfide (PPS), polyphthalamide (PPA) and/or a plastic material cross-linked by irradiation.

3. The pole member (11) according to claim 1, wherein the fixing member (20) includes or consists of a metal and/or that the fixing member (20) has a larger sectional diameter than the injection-molded part (13), wherein preferably the fixing member (20) is in the form of a disk (22) or ring (44).

4. The pole member (11) according to claim 1, wherein at least one sealing component (32) is formed on the fixing member (20) as additional scaling element (33), especially as sealing film (47), shrink hose and/or fluid or viscous sealing material (38).

5. The pole member (11) according to claim 4, wherein the additional sealing element (33) is tightly connected to the fixing member (20) especially by gluing and/or vulcanizing.

6. The pole member (11) according to claim 4, wherein the additional sealing element (33) includes an O-ring (39) which is disposed in a clamping groove (26) of the fixing member (20).

7. The pole member (11) according to claim 1, wherein at least one sealing component (32) is formed in the fixing member (20) by a geometric design of the fixing member (20), especially by at least one recess, at least one undercut (31) and/or at least one groove (24).

8. The pole member (11) according to claim 1, wherein the sealing component (32) is formed or arranged in or on at least one end face (23) of the fixing member (20) and extends especially through the through-hole (21) of the fixing member (20).

9. An igniter (10) for an inflator comprising a pole member (11) according to claim 1.

10. The igniter (10) according to claim 9 wherein the contact pins (14) are connected at an axial end of the pole member (11) by a bridge wire (16) which extends through at least one of and adjacent to a pyrotechnical ignition material (17, 18), wherein the pyrotechnical ignition material (17, 18) is enclosed by a cap (19) which is tightly connected to the axial end of the pole member (11).

11. An inflator comprising at least one of a pole member (11) and an igniter (10) according to claim 1.

12. The inflator according to claim 11, wherein the fixing member (20) for anchoring the pole member (11) and/or the igniter (10) in the inflator is connected to a casing (40) of the inflator by substance-to-substance bond, especially by welding, and/or by form closure, especially by crimping, wherein especially the fixing member (20) forms a spacer so that the injection-molded part (13) is arranged to be spaced apart from the casing (40) of the inflator.

13. An airbag module comprising at least one of an inflator and an igniter (10) and/or a pole member (11) according to claim 1.