Coaxial Connector Ground Terminal Shielding
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Solution Overview
Problem
In existing connectors for coaxial cables, the proximity of solder connecting portions can lead to short circuits during soldering, especially as devices miniaturize, making soldering difficult and unreliable.
Innovation Solution
A connector design featuring signal terminals and ground terminals arranged alternately, with a ground coupling member integrated through insert molding, where the ground terminals are connected to a shared ground coupling plate, and the housing is designed to accommodate the coaxial cable with a cable groove and rib portions to prevent solder bridging and improve soldering reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the spacing between adjacent terminals is reduced to achieve miniaturization, then the connector size is reduced, but the solder connecting portions may fuse causing short circuits
Solution Approach 1:
The ground terminal is designed with a stepped structure that extends in both the width direction and the up-down direction. The first extending portion extends in the width direction, while the second extending portion extends in the up-down direction, creating a three-dimensional configuration. This dimensional change allows the ground terminal to effectively shield the signal terminal from adjacent signal terminals without requiring reduced spacing in the width direction alone, thus preventing solder bridging while maintaining miniaturization.
2Device complexity
If the ground terminal extends only in the width direction, then the structure is simple, but it cannot effectively prevent solder bridging between adjacent signal terminals
Solution Approach 1:
The ground terminal transitions from a two-dimensional structure (extending only in width direction) to a three-dimensional stepped structure. The first extending portion extends in the width direction, and the second extending portion extends in the up-down direction, creating effective shielding coverage over the signal terminal's solder connecting portion without excessive complexity.
Solution Approach 2:
The ground terminal is segmented into two distinct extending portions: the first extending portion that extends in the width direction and the second extending portion that extends in the up-down direction. This segmentation allows each portion to perform its specific shielding function independently, effectively preventing solder bridging while maintaining structural clarity.
3Adaptability or versatility
If multiple separate ground coupling members are used for each ground terminal, then each ground terminal can be independently adjusted, but the number of components increases and cost increases
Solution Approach 1:
Multiple ground coupling members are merged into a single integrated ground coupling member that couples all ground terminals simultaneously. This unified structure reduces the number of components and assembly steps while maintaining the ability to adjust ground terminal positions during the molding process, thereby reducing cost and complexity without sacrificing adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design reduces the number of components, lowers noise, stabilizes signal quality, and simplifies the soldering process, enhancing the reliability and workability of the connector while preventing short circuits.
Implementation Method 1
the housing is integrally formed with the signal terminal, the ground terminal, and the ground coupling member by insert molding
Data Source
AI summary
A ground terminal is integrally formed with one ground coupling member extending in a width direction; a housing is integrally formed with a signal terminal, the ground terminal, and the ground coupling member by insert molding; the signal terminal has a contact portion that comes into contact with a counterpart signal terminal and a tail portion soldered to a core wire of a coaxial cable exposed from the housing; the ground coupling member includes a shield connecting portion that is exposed from the housing on a rear side of the tail portion of the signal terminal and soldered to a shield of the coaxial cable; and the ground terminal has a portion other than the contact portion embedded in the housing.