Electrical Connector Retention Structure for PCB Stability
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Solution Overview
Problem
Conventional electrical connectors experience undesired displacement during assembly and use, affecting signal/power transmission quality when soldered to a printed circuit board, as the insulative housing may involuntarily adjust relative to the board.
Innovation Solution
The electrical connector features an insulative housing with passageways having bumps along the insertion direction, and power contacts with a retention element that rides on these bumps to prevent counterclockwise movement, ensuring secure positioning and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrical connector structure is used, then assembly is simple, but undesired displacement occurs during assembly and use
Solution Approach 1:
The retention structure is segmented into multiple retention elements distributed across different power contacts, with each element independently engaging corresponding bumps on the insulative housing. This distribution of the retention function across multiple discrete elements provides stable positioning while keeping each individual element simple in design
Solution Approach 2:
The retention elements are integrated within the power contacts, which themselves are received within the insulative housing. The retention elements extend from the power contacts toward the insulative housing, creating a nested arrangement where the retention function is embedded within the existing contact structure rather than adding separate external components
2Manufacturing precision
If insulative housing is allowed to adjust during soldering, then assembly is easier, but signal/power transmission quality deteriorates
Solution Approach 1:
The retention elements and bumps are pre-configured to establish the correct positioning relationship between power contacts and insulative housing before the soldering process begins. This preliminary positioning action ensures that when assembly occurs, the components are already aligned precisely, maintaining alignment precision while facilitating easier assembly
Solution Approach 2:
The retention structure provides localized positioning control at specific critical points where power contacts interface with the insulative housing. By concentrating retention features at these specific locations rather than requiring uniform constraints throughout the entire assembly, the structure achieves precise alignment control while maintaining ease of manufacture
Data Source
AI summary
An electrical connector mountable on a printed circuit board includes an insulative housing and pairs of power contacts. Each power contact has a contacting portion, a tail portion and an intermediate portion interconnecting the contacting portion and the tail portion. The intermediate portion is provided with a retention element in a rear edge thereof extending towards an inside wall of a passageway defined through the insulative housing. Each inside wall of the passageway forms a bump thereon extending along an insertion direction of a complementary connector. The retention element rides on the bump to thereby prevent an involuntarily anti-clockwise movement of the insulative housing with respect to the printed circuit board.