Operation Cord Coupling Solid Fitting Protrusion Durability
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Solution Overview
Problem
Existing operation cords, especially those with hollow fitting mechanisms, lack durability and fail to withstand significant usage, leading to premature breakage under conditions requiring durability.
Innovation Solution
An operation cord design featuring a coupling portion with solid fitting protrusions and holes, where the protrusions are resiliently fitted into the holes, providing enhanced durability and a fail-safe mechanism that breaks under excessive force, allowing for easy reconstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a hollow fitting mechanism is used in the coupling portion, then the operation cord can be easily manufactured and assembled, but the durability is insufficient and the cord breaks prematurely under significant usage
Solution Approach 1:
The patent changes the physical state of the fitting protrusion from hollow to solid, fundamentally altering the structural parameter to enhance durability while maintaining the overall coupling mechanism design
Solution Approach 2:
The coupling portion combines solid fitting protrusions with hollow fitting holes, creating a composite structure where the solid protrusion provides strength and durability while the hollow hole allows for assembly and potential flexibility
2Reliability
If a solid fitting protrusion is used in the coupling portion, then the durability is significantly improved, but the manufacturing complexity increases
Solution Approach 1:
The solid fitting protrusion is designed to be self-forming through molding processes, where the molding technique automatically creates the solid structure without requiring additional manufacturing steps or assembly operations
3Object-affected harmful factors
If the coupling portion is designed to be uncoupled under fast and furious force, then safety is improved by preventing accidents, but the durability is reduced as the cord breaks before predetermined usage count is reached
Solution Approach 1:
The patent modifies the force threshold parameter by changing the protrusion from hollow to solid, raising the force required to break the cord while preserving the ultimate fail-safe mechanism against excessive force
Data Source
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AI summary
An operation cord that is excellent in durability is provided. According to the present invention, an operation cord comprising a cord whose both ends are coupled by means of a coupling portion is provided, the operation cord characterized in that the coupling portion has a first coupling part and a second coupling part which are coupled with each other directly or via a coupling member, one of the coupling parts or the coupling member adjacent to each other has a fitting protrusion, and the other of the coupling parts or the coupling member adjacent to each other has a fitting hole capable of fitting with the fitting protrusion, and the fitting protrusion is a solid body.