Laminated Wiring Member Through-Hole Layout Against Misalignment
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Solution Overview
Problem
When a laminated structure of sheets is overlapped, the positions of through holes may deviate, leading to an unexpected reduction in the size of the through hole in the wiring member.
Innovation Solution
A wiring member design where a first through hole is formed in one sheet and a second through hole, smaller than the first, is formed in another sheet, ensuring the second through hole remains open even if positions deviate, maintaining the size of the through hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If through holes are separately formed in the first sheet and the second sheet and then overlapped, then the wiring member can be assembled from individual components, but the positions of the through holes may deviate causing unexpected reduction in hole size
Solution Approach 1:
The patent merges the formation of through holes in the first sheet and second sheet into a single integrated process. By forming both through holes simultaneously using one punching operation rather than separately forming and then assembling, the patent eliminates positional deviation between holes while maintaining ease of manufacture. This combining approach resolves the contradiction by achieving both manufacturing efficiency and hole position precision.
2Reliability
If the second through hole is made smaller than the first through hole, then the smaller hole remains open even if positions deviate, but the structure becomes asymmetric and more complex to design
Solution Approach 1:
The patent applies local quality by making the second through hole smaller than the first through hole at a specific location. This local variation in hole size ensures that even if positional deviation occurs during assembly, the smaller second hole remains open and functional. The asymmetric design is localized rather than throughout the entire structure, balancing reliability improvement with acceptable design complexity.
Data Source
AI summary
A wiring member includes: a wire-like transmission member; a first sheet to which the wire-like transmission member is fixed; and a second sheet, at least a part of which is overlapped with the first sheet, wherein a first through hole is formed in one of the first sheet and the second sheet, a second through hole formed to be continuous with the first through hole and smaller than the first through hole is formed in another one of the first sheet and the second sheet.