Shielded Electrical Connector With Direct Housing Ground Path
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Solution Overview
Problem
Existing connectors with resin-covered outer circumferences have high impedance due to long path lengths for grounding the outer conductor to a metal housing, deteriorating shield performance.
Innovation Solution
An electrical connector design with an insulating mold covering the outer conductor, featuring a conductive portion that penetrates the mold and is integrally connected to the outer conductor, allowing direct contact with the metal housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the outer conductor of the shield cable is grounded via the ground wire of the circuit board using a connector with resin-covered outer surface, then the connector provides insulation property and color coding, but the path length to the metal housing becomes long causing high impedance and deteriorated shield performance
Solution Approach 1:
The connector is segmented into two functional parts: a resin-covered outer surface for insulation and color coding, and a conductive portion that penetrates the resin to provide direct grounding. This segmentation allows each part to fulfill its specific function without compromising the other.
Solution Approach 2:
The conductive portion acts as an intermediary element that bridges the outer conductor and the metal housing, penetrating through the insulating resin to establish a direct conductive path. This intermediary structure enables both insulation (via resin) and direct grounding (via conductive portion).
2Object-affected harmful factors
If the outer circumferential surface of the connector is covered with resin, then insulation property is provided, but the path length for grounding becomes long increasing impedance
Solution Approach 1:
The conductive portion extends in the radial dimension, penetrating through the resin coverage to reach the metal housing. This dimensional approach creates a direct conductive path that bypasses the insulating resin, effectively reducing the grounding path length while maintaining insulation on the outer surface.
3Ease of manufacture
If a ground wire is used to connect the outer conductor to the circuit board, then the connector can be fully covered with resin, but the impedance increases due to long path length
Solution Approach 1:
The connector structure is segmented to separate the insulation function (resin coverage) from the grounding function (conductive portion). This allows full resin coverage for manufacturing simplicity while the conductive portion provides a low-impedance path by directly penetrating to the metal housing.
Solution Approach 2:
The conductive portion is extracted from the resin material, creating a through-hole or penetration that allows direct electrical connection. This extraction enables the resin to fully cover the connector exterior for manufacturing ease while the removed/conductive portion maintains low impedance by establishing a direct path to the metal housing.
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
Minimizes path length for grounding the outer conductor, enhancing shield performance by reducing impedance and facilitating direct conductive connection.
Implementation Method 1
a conductor that is conductively connected with the outer conductor and penetrates the insulating mold
Data Source
AI summary
An electrical connector includes an inner conductor to transmit a signal; an insulator that covers an outer circumferential surface of the inner conductor; an outer conductor that covers an outer circumferential surface of the insulator and is insulated from the inner conductor by the insulator; an insulating mold that covers an outer circumferential surface of the outer conductor; and a conductor that is conductively connected with the outer conductor and penetrates the insulating molded, the conductor having a surface that is positioned outside the insulating mold and inclined toward a connection destination, and the outer conductor and the conductor are integrally formed.