Cylindrical Conductor Rotation Restriction in Wire Harnesses
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Solution Overview
Problem
Conventional wire harnesses with cylindrical conductive members face issues with rotation when attached to attachment targets due to their circular cylindrical shape, which can lead to instability and improper engagement.
Innovation Solution
Incorporating radial direction extensions on the cylindrical conductive members that engage with the attachment target in both the circumferential and axial directions, along with a fastener insertion hole, to restrict rotation and ensure reliable attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cylindrical conductive member with a circular cylindrical shape is used, then electromagnetic shielding is provided, but rotation about the central axis occurs when attached to the attachment target
Solution Approach 1:
The patent applies asymmetry by providing asymmetric engagement structures (such as protrusions or keys) on the cylindrical conductive member that engage with corresponding asymmetric features on the attachment target. This asymmetric design prevents rotational movement while maintaining the cylindrical overall shape for electromagnetic shielding, thus resolving the contradiction between providing electromagnetic shielding and preventing rotation.
2Ease of manufacture
If the cylindrical conductive member is attached to the attachment target using only axial engagement, then assembly is simple, but rotation is not restricted
Solution Approach 1:
The patent transitions from one-dimensional axial engagement to two-dimensional engagement by adding circumferential engagement features (such as flanges, ribs, or keyways) that engage in the circumferential direction. This multi-dimensional engagement approach restricts rotation while maintaining relatively simple assembly, resolving the contradiction between assembly simplicity and rotation restriction.
Data Source
AI summary
A wire harness that includes a braid composed of conductive strands; a cylindrical conductor that is electrically connected to the braid and can be attached to an attachment target; and an electrical wire inserted into the braid and the cylindrical conductor, wherein the cylindrical conductor includes a rotation restriction that restricts rotation of the cylindrical conductor with respect to the attachment target by engaging with the attachment target in a circumferential direction of the cylindrical conductor, and the rotation restriction also restricts the cylindrical conductor from moving in an axial direction of the cylindrical conductor by engaging with the attachment target in the axial direction.