Shielded Connector Cover Tab Retention and EMI Shielding
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Solution Overview
Problem
Existing electrical connectors with electromagnetic shielding functions face challenges in retaining the outer conductor to the inner and outer insulators due to the absence of a window, which degrades shielding performance and makes it difficult to secure the shield shell, leading to issues with electromagnetic noise emission and reception.
Innovation Solution
A shielded connector design featuring an inner housing with a catch protrusion and a shield shell with a cover tab that covers an opening, allowing the catch protrusion to be inserted and retained, while the cover tab provides electromagnetic closure and retention of the shield shell to both the inner and outer housings, preventing noise entry and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a window is provided in the shield shell for retaining the outer conductor to the insulator, then the retention capability is improved, but the electromagnetic shielding performance is degraded
Solution Approach 1:
The shield shell is segmented into a shell main body and a cover tab that can be separated. The cover tab is detachably attached to the shell main body, allowing the window to be closed during electromagnetic shielding operation while providing retention capability when assembled. This segmentation enables the shield shell to simultaneously achieve both retention function and electromagnetic shielding performance.
2Object-affected harmful factors
If no window is provided in the shield shell for improved electromagnetic shielding, then the shielding performance is improved, but the retention capability of the outer conductor to the insulator is degraded
Solution Approach 1:
The cover tab acts as an intermediary element that bridges the shell main body and the inner insulator. It provides the necessary retention capability through its attachment structure while maintaining the electromagnetic shielding integrity by covering the window opening. The catch protrusion on the inner insulator serves as another intermediary that secures the cover tab in place.
3Strength
If the cover tab is positioned close to the catch protrusion for better retention, then the retention capability is improved, but the electromagnetic shielding performance is degraded due to gap exposure
Solution Approach 1:
The cover tab is designed with differentiated functional zones: one area provides retention capability through engagement with the catch protrusion, while another area covers the window opening to maintain electromagnetic shielding. This local quality differentiation allows different parts of the same component to serve different functions simultaneously.
Data Source
AI summary
A shielded connector comprises an inner housing accommodating a contact and a shield shell surrounding the inner housing. The inner housing has a catch protrusion. The shield shell has a shell main body formed with an opening extending through the shield shell and a cover tab supported by the shell main body. The catch protrusion is inserted from an inside of the shield shell into the opening and the cover tab covers the opening while being set back from the catch protrusion toward an outside of the shield shell.