Shielded Wire Harness Connection Without Fold-Back Bulk
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Solution Overview
Problem
Conventional wire harnesses experience an increase in size due to the need for folding back the shielding member, which complicates the connection process and affects the overall dimensions of the conductive path.
Innovation Solution
A wire harness design that includes an electromagnetic shielding member connected to a shielding pipe extending from the connector housing, allowing the shielding member to be connected without folding, thereby preventing an increase in size, and incorporating sealing members and retainers for enhanced water resistance and corrosion prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shielding member is folded back to connect to the shielding ring, then electrical connection is achieved, but the size of the end portion of the conductive path increases
Solution Approach 1:
Instead of folding the shielding member back to achieve connection, the invention inverts the approach by having the shielding pipe extend outward from the connector housing. This allows the shielding member to connect directly to the extended shielding pipe without folding, thereby maintaining electrical connection while preventing size increase.
Solution Approach 2:
The invention resolves the spatial conflict by utilizing the extension dimension of the shielding pipe protruding from the connector housing. This dimensional approach allows the shielding member to connect along the extension direction rather than requiring lateral folding space, thus achieving connection without increasing the end portion size.
2Reliability
If the shielding member is folded back and clamped, then electrical connection is achieved, but the structure complexity increases
Solution Approach 1:
The invention simplifies the structure by inverting the conventional folding-and-clamping approach. Instead of folding the shielding member and using a clamping ring with a core, the shielding pipe itself extends to provide the connection interface, eliminating the need for folding and clamping mechanisms.
Solution Approach 2:
The invention extracts and eliminates the unnecessary folding and clamping components from the conventional structure. By having the shielding pipe extend directly from the connector housing, the design removes the complexity associated with folding mechanisms and clamping rings while maintaining the essential electrical connection function.
Data Source
AI summary
A wire harness that includes an electric wire including a core wire and an insulation coating that covers an outer circumference of the core wire; an electromagnetic shield that surrounds an outer circumference of the insulation coating; a connection terminal that is electrically connected to an end of the core wire; a connector housing that holds the connection terminal and is made of a synthetic resin; a shielding pipe that extends from an inside to an outside of the connector housing in a protruding manner; and a fixing member that fixes an end of the electromagnetic shield to an outer circumferential surface of a portion of the shielding pipe that is disposed outside the connector housing in an electrically connected state.