Coaxial Connector Shield Terminal Locking Mechanism
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Solution Overview
Problem
Conventional coaxial connectors face challenges in reducing production costs and maintaining optimal electric characteristics, particularly due to the difficulty in forming annular projection parts through press working, which can compromise impedance.
Innovation Solution
The coaxial connector design incorporates a shield terminal with a contact part, connecting part, and catching-target part formed integrally in a cylindrical shape, allowing for 360-degree rotation and reduced production costs through press working, while maintaining constant impedance by positioning the catching-target part behind the connecting part and using a supporting member to mitigate force on the insulator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If annular projection parts are formed by cutting a metallic column, then the shield terminal can be manufactured, but the production cost increases
Solution Approach 1:
The shield terminal is formed by press working a metallic plate instead of cutting a metallic column, changing the manufacturing method parameter to reduce cost while maintaining functionality
Solution Approach 2:
The annular projection parts are integrated into the shield terminal body through press working, extracting the need for separate cutting operations and reducing manufacturing complexity
2Reliability
If annular projection parts are formed by press working a metallic plate, then production cost may be reduced, but forming the projection parts becomes difficult
Solution Approach 1:
The annular projection parts are formed by bending the metallic plate in the radial dimension during press working, creating the necessary three-dimensional structure from a two-dimensional sheet
Solution Approach 2:
The press working process parameters are optimized to form the annular projection parts, changing the forming method to achieve the required shape without excessive difficulty
3Ease of operation
If annular projection parts are added to the shield terminal, then the locking function is achieved, but electric characteristics (impedance) are sacrificed
Solution Approach 1:
A dielectric body is introduced as an intermediary between the center terminal and shield terminal, isolating the annular projection parts from the electromagnetic field to prevent impedance degradation
Solution Approach 2:
The annular projection parts are positioned at the rear end of the shield terminal away from the contact area, creating a local structure that provides locking function without affecting the overall electric characteristics
Data Source
AI summary
A shield terminal includes a contact part surrounding a center terminal and a dielectric body and configured to come into contact with a terminal of a target connector, a connecting part surrounding a shield wire and connected to the shield wire, and a catching-target part surrounding a coaxial cable. The contact part, the connecting part, and the catching-target part are bent and formed integrally into a cylindrical shape to surround a center line of the coaxial cable. A housing includes, inside an insertion hole, a catching face configured to come into contact with a part of a front edge of the catching-target part to restrict the shield terminal from moving forward.