Self-Coupling Initiator Assembly with Drop Protection Cap
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Solution Overview
Problem
Current initiator installation methods, such as crimping or threading, are time-consuming, and existing drop protection caps do not effectively prevent damage to electrical connectors during handling or drop tests.
Innovation Solution
A self-coupling initiator assembly with integrated grooves and arms that allow for easy installation without forming or fastening operations, and a drop protection cap that transfers impact forces to the housing, preventing damage to the initiator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If crimping or threading methods are used to install initiators, then secure installation is achieved, but installation time increases
Solution Approach 1:
The initiator head includes integrated arms with clips that automatically engage with grooves in the housing tube during insertion. The arms are biased outward by springs to facilitate engagement, and once inserted, the clips snap into the grooves to secure the initiator without requiring external crimping or threading operations. This self-securing mechanism eliminates time-consuming fastening operations while ensuring reliable installation.
2Object-affected harmful factors
If drop protection caps are coupled to the outside of the tube, then electrical connectors are protected during drops, but device complexity increases
Solution Approach 1:
The drop protection cap is integrated with the housing tube through the existing arm structure. The arms extend through the housing tube and are received by the cap, which is coupled to the external surface of the tube. This integration allows the cap to serve dual purposes: protecting the electrical connectors during drops while also providing a mounting structure that simplifies the overall device architecture by combining protection and structural functions.
3Ease of operation
If arms are biased radially inward to engage grooves, then initiator installation is simplified, but manufacturing precision requirements increase
Solution Approach 1:
The arms are equipped with springs that bias them radially outward, allowing them to flex and adapt during the insertion process. This dynamic behavior enables the arms to engage with grooves of varying dimensions within a tolerance range, accommodating manufacturing variations without requiring extremely tight tolerances. The spring-loaded mechanism provides compliance that simplifies both installation and manufacturing compared to rigid engagement systems.
Data Source
AI summary
Various implementations include a self-coupling initiator including one or more integrated features that allow the initiator to be installed within a housing tube without a forming or fastening operation. The integrated features are able to be coupled to a drop protection cap. The drop protection cap extends around at least a portion of a head portion of the initiator and abuts the structure of the outer housing so that force imparted on the drop protection cap from a drop test is transferred to a direct compression load on the cap and housing, instead of the force being transferred to the initiator. In addition, the initiator may include one or more clip features that allow the initiator to clip into the housing. In such embodiments, the drop protection cap may also prevent the clips from being disengaged with the housing.