Pole Member Sealing Integration for Inflator Igniters
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Solution Overview
Problem
Existing pyrotechnical igniter pole members for inflators require complex assembly and high manufacturing costs due to numerous components and stringent sealing requirements, which increase production expenses and manufacturing tolerances.
Innovation Solution
A pole member with embedded electrically conductive contact pins and a fixing member, where sealing components are integrated into the injection-molded part or fixing member, eliminating the need for additional sealing elements and simplifying the structure, ensuring a tight and stable connection to the inflator casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional sealing elements are used to meet tightness requirements, then sealing reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The sealing component is integrated into the fixing member as a unified structure, eliminating the need for separate sealing elements. The fixing member and sealing component form an integrated assembly that is embedded in the injection-molded part, reducing the total number of components while maintaining sealing effectiveness.
Solution Approach 2:
The fixing member serves multiple functions: it provides mechanical anchoring of the pole member and simultaneously incorporates the sealing component to ensure tightness. This multi-functional design eliminates the need for dedicated sealing elements, reducing complexity while maintaining reliability.
2Reliability
If additional sealing elements are used to meet tightness requirements, then sealing reliability is improved, but manufacturing cost increases
Solution Approach 1:
The sealing component is combined with the fixing member into a single integrated component, reducing the number of parts that need to be manufactured, stored, and assembled. This integration reduces manufacturing costs while maintaining the required sealing reliability.
Solution Approach 2:
The fixing member is designed to perform both mechanical anchoring and sealing functions simultaneously. This multi-functionality reduces the total component count and assembly complexity, leading to lower manufacturing costs while ensuring reliable sealing.
3Reliability
If separate sealing elements are used, then sealing function is achieved, but assembly complexity increases
Solution Approach 1:
The sealing component is merged with the fixing member into a single pre-assembled unit that is embedded in the injection-molded part. This integration eliminates the need for separate sealing element installation, reducing assembly complexity while maintaining sealing function.
Solution Approach 2:
The sealing component is pre-integrated into the fixing member during its manufacturing process, so that when the pole member is assembled, the sealing function is already in place. This preliminary integration simplifies the final assembly process while ensuring proper sealing.
Data Source
AI summary
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.