Wire Crimping Structure with Cantilevered Locking Portions
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Solution Overview
Problem
Existing wire crimping structures have a weak fixing force due to direct locking of hooks, which restricts displacement and limits the locking margin, resulting in inadequate fixing strength between the crimping portion and the wire.
Innovation Solution
A wire crimping structure with a base plate and cantilevered crimping pieces that include locking portions and a restricting portion, where the locking portions lock the restricting portion in opposite directions, expanding the locking margin and enhancing the fixing strength by allowing longer extending lengths without direct locking between the crimping pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hooks directly lock to each other in the conventional crimping structure, then displacement of crimping pieces is restricted, but the locking margin is small and fixing strength is weak
Solution Approach 1:
A restricting portion is introduced as an intermediary element between the first and second locking portions. The first locking portion and second locking portion lock the restricting portion in opposite directions, preventing direct contact between locking portions while expanding the locking margin along the wire axis without compromising displacement restriction
Solution Approach 2:
The locking mechanism transitions from direct axial locking to circumferential locking around the restricting portion. By locking in opposite directions along the circumferential path, the locking portions achieve both displacement restriction and extended locking margin without direct contact
2Strength
If crimping pieces are crimped to surround the wire, then fixing strength is improved, but the locking margin in axial direction is limited by the width of crimping pieces
Solution Approach 1:
The crimping piece is divided into distinct functional segments: a base plate portion disposed along the wire, and locking portions extending from opposite sides. This segmentation allows the locking portions to engage the restricting portion over an extended axial distance while the base plate provides stable mounting, thereby increasing the locking margin without compromising fixing strength
Data Source
AI summary
A crimping portion (25) of a connection structure of a shielded wire (11) includes a base plate (30) along an outer periphery of the shielded wire (11). A first crimping piece (31) is cantilevered from a first side of the base plate (30) and is crimped to surround the shielded wire (11). A second crimping piece (36) is cantilevered in a direction opposite the first crimping piece (31) from a second side of the base plate (30) and is crimped to surround the shielded wire (11). A restricting portion (46) is disposed along the outer periphery of the shielded wire (11). First locking portions (34) of the first crimping piece (31) and second locking portions (39) of the second crimping piece (36) lock the restricting portion (46) in directions opposite to each other along the circumferential direction.