Outer Conductor Crimping Structure for Reliable Locking
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Solution Overview
Problem
The crimping structure in existing technologies is prone to inclination in the circumferential direction due to dimensional variations, leading to potential unlocking of the locking portion, which cannot lock properly.
Innovation Solution
A wire-and-outer conductor crimping structure with a crimping portion comprising a base plate, cantilevered first and second crimp portions, and a restricting portion, where the first locking portion faces one side of the restricting portion and the second locking portion faces the other side, with the width of the first part facing the first locking portion set to be smaller than the second part, preventing the locking portion from riding on the restricting portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a clearance is provided between the crimping portion and the jig to accommodate dimensional variations, then the adaptability to dimensional variations is improved, but the restricting portion becomes inclined in the circumferential direction due to timing shift, causing the locking portion to ride on the restricting portion and fail to lock
Solution Approach 1:
The restricting portion is designed with asymmetric width in the circumferential direction, where the first part has a greater width than the second part. This asymmetric configuration compensates for the inclination caused by clearance, ensuring that the locking portion can still engage properly with the restricting portion even when timing shifts occur during crimping.
Solution Approach 2:
Different parts of the restricting portion are given different width characteristics. The first part facing the first locking portion has a greater width to provide sufficient engagement area, while the second part has a smaller width to accommodate the inclination. This local differentiation ensures reliable locking despite the overall inclination of the restricting portion.
2Reliability
If the clearance between the crimping portion and the jig is eliminated to prevent inclination of the restricting portion, then the locking reliability is improved, but the adaptability to dimensional variations deteriorates
Solution Approach 1:
The restricting portion employs asymmetric width design where the first part has greater width and the second part has smaller width. This asymmetry allows the structure to maintain reliable locking engagement while accommodating dimensional variations through the differential width compensation mechanism.
Solution Approach 2:
The width parameter of the restricting portion is varied in the circumferential direction, with the first part having a greater width than the second part. This parameter change enables the restricting portion to adapt to timing shifts and inclination while maintaining effective locking engagement.
3Ease of manufacture
If the restricting portion is designed with uniform width in the circumferential direction, then the manufacturing simplicity is improved, but the locking portion cannot engage reliably when the restricting portion is inclined
Solution Approach 1:
The restricting portion is designed with asymmetric width where the first part has greater width than the second part. This asymmetric configuration is relatively simple to manufacture while effectively preventing the locking portion from riding on the restricting portion during inclination, thus maintaining locking reliability.
Solution Approach 2:
The restricting portion has different width characteristics at different locations: the first part has greater width for reliable engagement, while the second part has smaller width to accommodate inclination. This local differentiation maintains manufacturing simplicity while ensuring locking reliability.
Data Source
AI summary
A crimping portion of an outer conductor includes a first crimp portion cantilevered in one circumferential direction from a base plate portion and surrounding a shielded cable, a second crimp portion cantilevered in the other circumferential direction from a position forward of the first crimp portion in the base plate portion and surrounding the shielded cable, a first locking portion provided by folding a tip part of the first crimp portion inward, a second locking portion provided by folding a tip part of the second crimp portion inward, and a restricting portion cantilevered backward in an axial direction of the shielded cable. The second locking portion faces an end edge of the restricting portion on one circumferential side. The first locking portion faces an end edge of the restricting portion on the other circumferential side behind the second locking portion in the axial direction.