Three-Shell Electrical Connector Shielding for Grounding Stability
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Solution Overview
Problem
Existing electrical connectors lack sufficient mechanical securing and electrical grounding effects due to separation of the rear and lower shells.
Innovation Solution
An electrical connector design featuring three metallic shells, including a first shell surrounding the insulative housing, a second shell with a pair of side frame portions, and a third shell with a front and rear plate, which together enclose and shield the soldering tails and cable ends, enhancing the grounding and shielding capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the rear shell and lower shell are separated from each other, then the device complexity is reduced and ease of manufacture is improved, but the mechanical securing effect and electrical grounding effect deteriorate
Solution Approach 1:
The shielding assembly is divided into multiple independent shells (first shell, second shell with side frame portions, third shell with front and rear plates) that can be manufactured separately and then assembled together, maintaining ease of manufacture while achieving complete enclosure for proper grounding
Solution Approach 2:
The multiple shells are nested together to form a complete shielding enclosure, with the second shell and third shell nested within or adjacent to the first shell, creating a unified grounding structure from separate components
2Device complexity
If the rear shell and lower shell are separated from each other, then the device complexity is reduced, but the mechanical securing effect deteriorates
Solution Approach 1:
The shielding structure is segmented into multiple shells that can be manufactured and assembled independently, reducing device complexity while maintaining structural integrity through proper connection design
Solution Approach 2:
The multiple shells are combined through welding or other connection methods to form a unified shielding structure that provides both mechanical security and electrical grounding, merging the functions of separate components
3Reliability
If three metallic shells are used to enclose and shield the soldering tails and cable ends, then the electrical grounding and shielding effect is improved, but the device complexity increases
Solution Approach 1:
The shielding assembly is segmented into three functional shells with specific assignments: first shell covers side faces and end faces, second shell with side frame portions provides structural support, and third shell with front and rear plates shields the connection area, allowing each to be optimized independently
Solution Approach 2:
The multiple shells serve multiple functions simultaneously: providing mechanical protection, establishing electrical grounding, and shielding electromagnetic interference, thereby justifying the increased complexity through enhanced multi-functionality
Data Source
AI summary
An electrical connector includes: an insulative housing; two rows of contacts retained in the insulative housing, each contact having an elastic arm and a soldering tail; a shielding assembly retained in the insulative housing and located between the two rows of contacts; plural cables having front ends connected with the soldering tails of corresponding contacts; a first shell covering the insulative housing; and a second shell and a third shell, wherein the second shell has a pair of side frame portions located by end faces of the insulative housing and a rear plate, the third shell has a front frame portion and a rear plate, and the front frame portion and the rear plate of the third shell and the rear plate of the second shell together entirely enclose and shield the soldering tails of the contacts and the front ends of the cables.