Connector Shield Shell Holding Members Annular Braid Fastening
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Solution Overview
Problem
Conventional connectors and electric wires with connectors face challenges in achieving uniform contact pressures and enhanced shield performance due to difficulties in effectively connecting annular development portions between plates, leading to suboptimal durability and shield performance.
Innovation Solution
The connector design incorporates first and second holding members with annular holding portions that interpose and securely fasten annular development portions of the electric wire braids, using screwing mechanisms to ensure axial force distribution and grounding through a shield shell, eliminating the need for crimping and reducing size by avoiding unnecessary load on core wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If crimping is used to connect the cylindrical shield member to the braid, then crimping force is ensured and durability is improved, but force is transmitted to the internal core wire causing potential damage
Solution Approach 1:
A cylindrical member is introduced as an intermediary element between the braid and the cylindrical shield member. This mediator receives the crimping force from the shield member and transmits it to the braid, preventing direct force transmission to the core wire while ensuring adequate crimping force is applied to secure the shield member connection
2Reliability
If two plates are used to connect annular development portions, then connection is achieved, but contact pressures are not uniform resulting in suboptimal shield performance
Solution Approach 1:
The connection method is changed from simple plate clamping to screw fastening, which allows for controlled application of axial force. By adjusting the screw tightening parameters, uniform contact pressure can be achieved across the annular development portions, ensuring reliable electrical connection and optimal shield performance
3Reliability
If conventional crimping method is used, then shield performance is maintained, but device size increases due to unnecessary components
Solution Approach 1:
The cylindrical member that was previously a separate component is integrated into the holding member structure. The holding member itself is designed to provide both the mechanical holding function and the crimping function, eliminating the need for a separate cylindrical member and reducing overall connector size while maintaining shield performance
Data Source
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AI summary
A connector includes a shield shell (20B) that has a sub shield body (52) covering the electric connection portions (12) and the terminals of the electric wires (We) externally, and first and second holding members (61 and 62) that hold exposed braids (We3) at the terminals of the electric wires (We). The sub shield body (52) has a second accommodation chamber (52b) that covers the exposed braids (We3) at the terminals of the electric wires (We) and the first and the second holding members (61 and 62) externally. The first and the second holding members (61 and 62) are members holding, along axial lines of the terminals of the electric wires (We), annular development portions (We31) of the braids (We3) that are formed by annularly developing the exposed braids (We3) to the outer side in the radial direction, have annular holding portions (61a and 62a) interposing the annular development portions (We31) therebetween, and are pressed against and fixed to the shield shell (20B) along the holding direction of the annular development portions (We31).