Personal Protective Airbag Quick-Release Joint for Secure Replacement
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Solution Overview
Problem
Existing personal protective devices using automobile gas generators face issues with loose connections due to screw threads, leading to potential disengagement and increased risk of injury, and require time-consuming replacement processes.
Innovation Solution
A personal protective device with a quick-release joint featuring a socket member and fixing ring, along with a fixed convex column, ensures secure and rapid assembly and disassembly of the gas generator, utilizing a cylindrical assembly part and rotational grooves for double tightening, and includes a triggered unit for immediate inflation and deflation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw threads are used to connect the gas generator to the pouch, then the connection can be secured, but the replacement process becomes time-consuming and the connection may loosen without final tightening
Solution Approach 1:
The connection system is divided into separate components: a connection head with internal threads on the pouch side, and a connection body with external threads on the gas generator side. This segmentation allows for quick attachment and detachment without requiring full threading operations, reducing replacement time while maintaining connection security through the threaded interface.
Solution Approach 2:
The connection structure includes pre-positioned threaded features and alignment elements that guide the gas generator into place during attachment. The internal and external threads are pre-configured to engage automatically, eliminating the need for manual rotation and final tightening operations, thus reducing replacement time while ensuring reliable connection.
2Reliability
If screw threads are used to connect the gas generator to the pouch, then the connection can be made, but the screw threads may be damaged after repeated use or over-tightening, causing the gas generator to become uncontrollable
Solution Approach 1:
The connection design incorporates threaded interfaces with controlled engagement characteristics that prevent over-tightening. The internal and external threads are designed with appropriate thread profiles and engagement lengths that provide sufficient connection security while preventing damage from excessive tightening forces, ensuring durability through repeated operations.
Solution Approach 2:
The connection head and connection body act as intermediary elements between the pouch and gas generator. These intermediaries include threaded features that provide secure attachment while protecting the gas generator from direct mechanical stress and damage during attachment and detachment operations, improving operation durability.
3Loss of time
If a quick-release joint is used with rotational grooves, then rapid replacement is achieved, but the structure becomes more complex
Solution Approach 1:
The quick-release joint is segmented into distinct functional elements: connection head, connection body, rotational grooves, and sealing components. This segmentation allows each element to perform its specific function independently, enabling rapid replacement through simple rotational motion while keeping the overall structure manageable and manufacturable.
Solution Approach 2:
The connection structure incorporates rotational grooves that enable dynamic attachment and detachment through rotational motion. This dynamic mechanism allows the gas generator to be quickly connected and disconnected by rotating the connection body, achieving rapid replacement while the grooves guide the motion to prevent misalignment and simplify the operational complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves rapid replacement, immediate deflation, and enhanced safety through secure connections, preventing disengagement and facilitating quick inspection or medical aid.
Implementation Method 1
the gas generator inside the airbag can be instantly inflated within a very short period of time, so as to form a barrier layer with cushioning and protective functions
Implementation Method 2
The assembly part is provided with an elastic ring; one end of the socket member has an insertion hole into which the assembly part reaches
Data Source
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AI summary
A personal protective device (1) is provided, which includes a device body (10), at least one airbag unit (20), and an inflatable module (30). The device body (10) is configured to be worn on a user. The at least one airbag unit (20) is disposed on the device body (10). The inflatable module (30) is disposed on the device body (10) and connected to the at least one airbag unit (20); the inflatable module (30) is configured to inflate the at least one airbag unit (20). The inflatable module (30) includes a gas generator body (31) and a quick-release joint (32). One end of the gas generator body (31) is provided with a gas discharge part (312) and a fixed convex column (313). A socket member (321) and a fixing ring (322) respectively have predetermined fixing structures corresponding to the fixed convex column (313), so as to achieve the effects of quick disassembly, simple structure, and double tightening.