Gas Generator Filter Housing for Secure Pre-Assembly Retention
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Solution Overview
Problem
In existing gas generators, the filter is not fixed within the filter housing before attachment to the container, leading to a risk of the filter falling off during manufacturing, making the gas generator difficult to handle.
Innovation Solution
A filter unit design where the filter is accommodated in a coaxially positioned and fixed state within the filter housing, utilizing a first and second restraining end part and a peripheral wall part to securely hold the filter, preventing it from falling off during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the filter is not fixed in the filter housing before attachment, then the filter housing can be easily assembled, but the filter may fall off during manufacturing making the gas generator difficult to handle
Solution Approach 1:
The filter is preliminarily fixed in the filter housing by the restraining peripheral wall part before the filter housing is attached to the container. This preliminary positioning action ensures the filter remains in place during manufacturing operations, eliminating the handling difficulties that would otherwise occur.
Solution Approach 2:
The restraining peripheral wall part acts as an intermediary structure between the filter and the filter housing. It provides a mechanical interface that secures the filter in position while allowing the filter housing itself to remain simple for assembly purposes.
2Reliability
If the filter is fixed within the filter housing, then the filter remains stable during manufacturing, but the filter housing structure becomes more complex
Solution Approach 1:
Instead of making the entire filter housing complex, only a specific local region - the restraining peripheral wall part - is designed with restraining functionality. This localized approach provides the necessary filter stability while keeping the rest of the filter housing structure simple.
Solution Approach 2:
The filter housing is segmented into functional regions: the restraining peripheral wall part that secures the filter, and the rest of the housing that maintains a simple assembly structure. This segmentation allows each part to optimize its specific function without unnecessarily increasing overall complexity.
Data Source
AI summary
A filter unit for a gas generator includes a filter and a filter housing coaxially positioning and fixing the filter in a filter accommodating space. The filter housing includes a first restraining end part disposed as a closing surface at one end of the filter housing and restraining a one axial end surface of the filter, a second restraining end part disposed at an other end of the filter housing, surrounding a gas inflow port, and restraining an other axial end surface of the filter, and a peripheral wall part connecting the first restraining end part and the second restraining end part and including a gas discharge port. The peripheral wall part includes a restraining peripheral wall part restraining a peripheral surface of the filter, and a non-restraining peripheral wall part in which the gas discharge port is disposed.