Tubular Outer Member Guide Groove for Wire Harness Vibration
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Solution Overview
Problem
Wire harnesses in automobiles experience shaking due to vibrations, which can damage the conductive path's covering, such as an outside braid or metal foil, when routed under the vehicle floor.
Innovation Solution
A tubular outer member with a fixing member mounting portion that includes a guide groove and lead-in/out portions, allowing a conductive path fixing member like a cable tie or band clamp to be mounted, guiding and locking the conductive path to prevent shaking and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wire harness is routed straightly under the floor, then the installation is simple and space is saved, but the conductive path shakes due to vibration and the covering may be damaged
Solution Approach 1:
The outer member is divided into multiple sections with guide grooves created at specific intervals along the tubular structure. These grooves segment the internal space to provide anchoring points for the conductive path, allowing it to be secured at multiple locations rather than relying on a single fixed point or continuous friction fit.
Solution Approach 2:
The guide grooves are pre-formed during the manufacturing of the outer member, creating ready-made receptacles for the conductive path before assembly. This preliminary preparation eliminates the need for complex field installation procedures and ensures that the conductive path can be easily secured against vibration from the outset.
2Ease of operation
If the conductive path is loosely housed in the outer member, then the installation is easy, but the conductive path shakes widely and the covering may hit the inner surface strongly
Solution Approach 1:
The guide grooves create localized zones within the outer member where the conductive path is specifically anchored. Rather than requiring the entire length of the conductive path to be tightly constrained, only specific segments at the groove locations need to be secured, while other portions can remain loosely housed for ease of installation and flexibility.
3Reliability
If the conductive path is tightly fixed along the entire length, then vibration resistance is improved, but the installation complexity increases
Solution Approach 1:
Instead of implementing a continuous fixing mechanism along the entire length of the conductive path, the guide grooves provide discrete, segmented anchoring points. This segmentation simplifies the overall structure by eliminating the need for complex continuous clamping or binding mechanisms, while still achieving effective vibration resistance at critical locations.
Data Source
AI summary
A tubular outer member which houses and protects a conductive path, the tubular outer member includes a fixing member mounting portion in which a conductive path fixing member is to be mounted so as to fix the conductive path. The fixing member mounting portion includes a guide groove configured to guide a conductive path winding portion of the conductive path fixing member extending like a line or a belt, and a pair of lead-in/out portions. The conductive path winding portion is to be inserted to and pulled out from the pair of lead-in/out portions.