Electrical Connector Shielding Shell Grounding Path Design
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Solution Overview
Problem
Existing electrical connector assemblies face issues with grounding during insertion, leading to potential short circuits and damage to signal chips due to the shielding shell not being immediately grounded, causing inclined insertion and contact with signal terminals.
Innovation Solution
The design incorporates a shielding shell that is conductive to a metal shell in the first mating state, with a gap between the grounding elastic member and signal terminals to prevent short circuits, and allows contact between signal terminals in the second mating state for effective electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shielding shell does not completely cover the front end of the plastic main body, then the plastic main body can protrude out for insertion, but the shielding shell cannot be immediately grounded at the beginning of insertion, causing the grounding elastic member to be prone to contact with signal terminals and cause short circuits
Solution Approach 1:
The grounding elastic member is pre-configured to contact the shielding shell before signal terminals are exposed. The shielding shell extends forward to contact the metal shell of the electrical connector at the beginning of insertion, establishing a grounding path in advance. This preliminary grounding action prevents the grounding elastic member from contacting signal terminals during the insertion process, eliminating the short circuit risk while maintaining insertion capability.
2Reliability
If a gap is provided between the grounding elastic member and signal terminals, then short circuits are prevented, but the device complexity increases due to the need for precise positioning and spacing control
Solution Approach 1:
The shielding shell serves as an intermediary element between the grounding elastic member and signal terminals. By extending the shielding shell forward to contact the metal shell, it creates a physical barrier and establishes a grounding path that prevents the grounding elastic member from directly contacting signal terminals. This intermediary structure simplifies the design by using the existing shielding shell geometry to maintain the necessary gap, rather than requiring additional positioning mechanisms.
3Reliability
If the shielding shell is made conductive to the metal shell, then grounding is achieved, but the structural complexity increases due to the need for conductive connections
Solution Approach 1:
The shielding shell is designed to directly contact the metal shell of the electrical connector, merging the grounding function into the existing structural components. The front end of the shielding shell extends forward to contact the metal shell, creating an integrated grounding path without requiring separate conductive connections or additional grounding mechanisms. This merging approach achieves effective grounding while minimizing structural complexity.
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 ensures the grounding elastic member is grounded in the first mating state, preventing short circuits and ensuring a stable electrical connection between the electrical connector and mating connector, even during inclined insertion.
Implementation Method 1
the shielding shell is conductive to the metal shell... the grounding elastic member is in contact with the shielding shell... ensures the grounding elastic member is grounded
Data Source
AI summary
An electrical connector assembly includes an electrical connector and a mating connector. The electrical connector includes a base and a tongue extending forward from the base. A first signal terminal is fixedly provided on the base and exposed to the surface of the tongue. A metal shell is sleeved over the base and the tongue to form an insertion space between the metal shell and the tongue. The mating connector includes a plastic seat body. A second signal terminal is fixedly provided on the plastic seat body and extending into a mating space. A grounding elastic member is fixedly provided on a wall portion and exposed to the mating space. In the first mating state, the second signal terminal is not in contact with the first signal terminal. In the second mating state, and the second signal terminal is in contact with the first signal terminal.