Shielded Cable Connector Structure for Closing Noise Leakage Paths
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Solution Overview
Problem
Existing connectors for shielded cables suffer from noise leakage and entry due to clearances between locking holes and protrusions, compromising shielding performance.
Innovation Solution
A connector design featuring a first outer conductor with a tubular portion and a second outer conductor that crimp over the first conductor, closing its through holes to prevent noise entry and leakage, while an insulating dielectric is locked within the tubular portion using locking pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the base portion and shell cover portion are integrally assembled with locking holes and locking protrusions, then the connector achieves structural assembly and connection, but clearances are formed between locking holes and locking protrusions causing noise to enter or leak through
Solution Approach 1:
The connector is divided into two separate shielding structures: a first outer conductor (shell cover portion) and a second outer conductor (base portion), each with independent shielding functions. The first outer conductor provides primary shielding with its through holes, while the second outer conductor provides additional shielding at the base, collectively eliminating noise pathways without requiring tight tolerances between locking features
Solution Approach 2:
The first outer conductor is nested within the second outer conductor, creating a multi-layer shielding structure. The first outer conductor's tubular portion surrounds the connection plate portion, and both are enclosed by the second outer conductor's surrounding portion, forming concentric shielding layers that block noise from multiple directions
2Reliability
If multiple locking holes are formed in the base portion to lock another member, then the connector achieves secure connection, but noise leakage paths are created through the locking holes
Solution Approach 1:
The locking function is separated from the shielding function. The first outer conductor maintains shielding integrity through its continuous tubular structure with controlled through holes, while the second outer conductor provides the locking holes for connection reliability. This segmentation allows each component to optimize its primary function without compromising the other
Solution Approach 2:
The connection plate portion acts as an intermediary element that bridges the first and second outer conductors. It provides a mounting surface for locking features while being enclosed by the shielding structures, allowing secure connection without creating direct noise pathways through the shielding layers
Data Source
AI summary
A female connector to be connected to an end part of a shielded cable configured such that outer peripheries of coated wires each including a core and insulation coating are surrounded by a braided wire is provided with female terminals, a first outer conductor including a tubular portion in a state electrically insulated from the female terminals, the tubular portion being formed with a through hole, and a connection plate portion, and a second outer conductor including a rear crimping portion to be crimped to the braided wire and the connection plate portion from outside the braided wire and the connection plate portion and a left side wall and a right side wall for covering at least parts of the tubular portion from outside the tubular portion. The through hole of the first outer conductor is closed by the left and right side walls.