Shielded Cable Connector Housing for Stable EMI Shield Contact
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Solution Overview
Problem
Conventional electromagnetic shield structures in electric connectors suffer from poor contact due to changes in cable diameter caused by aged deterioration of insulative coatings, leading to deteriorated electromagnetic shielding performance.
Innovation Solution
An electric connector unit design where the cable shield is connected to a shield fixation portion within the connector housing without direct contact with the insulative coating, using a shield fixation portion that is integrated with the shell and connected to the cable shields through an opening in the terminal housing, ensuring stable electrical connection without relying on additional elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the outer conductor is folded back and placed on the insulative coating for shielding connection, then the shielding structure is simplified, but the cable outer diameter changes with temperature and aging causing poor contact
Solution Approach 1:
The shield fixation portion is pre-installed and embedded in the opening of the terminal housing before cable connection. This preliminary action creates a ready-made, stable electrical connection point that compensates for future dimensional changes in the cable, ensuring reliable contact without requiring complex adjustment mechanisms.
Solution Approach 2:
The fixation portion acts as an intermediary that bridges the cable shield and the connector housing, providing a stable mounting point that is independent of the cable's dimensional stability. This intermediary structure maintains reliable electrical connection despite temperature variations and aging effects on the insulative coating.
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 configuration maintains effective electromagnetic shielding by preventing poor contact due to changes in cable diameter, ensuring reliable electrical connections and improved shielding performance.
Implementation Method 1
since an insulative coating is commonly formed of a heat-shrinkable material that is increasingly shrunk with increasing temperature, the outer diameter of the cable can be reduced due to generation of heat and/or the like, caused by the actuation and operation of an electric apparatus
Data Source
AI summary
An electric connector unit comprises a connector and a cable connected thereto. The connector includes a terminal housing having an opening, and a shell attached to the terminal housing and having a shield fixation portion inserted into the opening. The cable comprises an inner cable bundle having a plurality of inner cables, and a cable shield surrounding the inner cable bundle. At least a portion of the cable shield is inserted into the opening and electrically connected to the shield fixation portion within the opening.