Connector Elastic Strip Resolving Solder Skip and Short
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Solution Overview
Problem
In stacked electrical connectors, the conductive elastic strip's resilience leads to loose connections during assembly, resulting in soldering defects like solder skip and solder short due to vibrations, affecting the quality and stability of digital signal transmission.
Innovation Solution
The electrical connector design features a conductive element with a flexible elastic strip that provides an elastic restoring force, allowing the strip to reciprocate between sidewalls and press against the connection port, reducing the reacting force and ensuring stable connection and EMI shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conductive elastic strip is used to provide EMI shielding by pressing against the connection port, then electromagnetic shielding effectiveness is improved, but connection stability deteriorates due to loose connection during assembly vibrations
Solution Approach 1:
The conductive element is divided into two functional parts: a body portion for structural support and penetration through the base, and a separate elastic strip portion for EMI shielding contact. This segmentation allows each part to optimize its specific function without compromising the other.
Solution Approach 2:
The elastic strip acts as an intermediary element between the conductive element body and the connection port, providing both mechanical contact for stability and electrical contact for EMI shielding. The strip mediates the interaction between the rigid connector structure and the flexible shielding requirement.
2Object-affected harmful factors
If the conductive elastic strip is resilient to maintain contact pressure, then EMI shielding is improved, but soldering quality deteriorates due to loose connection during reflow soldering
Solution Approach 1:
The conductive element body is designed to penetrate through the base and make preliminary contact with the connection port before the elastic strip engages. This preliminary action establishes a stable mechanical connection that prevents movement during subsequent soldering processes.
Solution Approach 2:
The elastic strip provides beforehand cushioning by maintaining constant contact pressure on the connection port, compensating for any dimensional variations or movements during assembly and soldering, thereby ensuring both EMI shielding and soldering quality.
3Adaptability or versatility
If the elastic strip is allowed to reciprocate freely between sidewalls, then connection adaptability is improved, but connection stability deteriorates leading to solder skip and solder short defects
Solution Approach 1:
Different regions of the conductive element have different properties: the body portion has rigid structural quality for stable penetration and positioning, while the elastic strip portion has flexible quality for adaptability and EMI contact. This local quality differentiation resolves the contradiction between adaptability and precision.
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 prevents soldering defects, reduces the defective rate, and enhances the quality and stability of digital signal transmission by maintaining a secure connection between the connector and the circuit board.
Implementation Method 1
the first elastic strip is connected to the body and located adjacent to the first sidewall of the base, and the other end of the first elastic strip extends toward the breach of the base and is capable of reciprocating between the first and the second sidewalls of the base arbitrarily
Data Source
AI summary
An electrical connector, which is adapted to a printed circuit board (PCB) with a first connection port, comprises a bottom having a base and a conductive element mounted in an opening of the base, a second connection port disposing on the base, and a housing covering the bottom. When the bottom is disposed on the PCB, the first connection port is accommodated in the opening of the base, and an elastic strip of the conductive element presses on the first connection port toward a direction parallel to the PCB for combining the electrical connector and the first connection port on the PCB, and preventing the separation or loose connection of the electrical connector from the first connection port or the PCB.