Wire Harness Path Restricting Cover With Liquid Drainage
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Solution Overview
Problem
Conventional wire harnesses face reliability issues with the connection between the path restricting member and other components due to liquid accumulation, leading to detachment and misalignment.
Innovation Solution
The wire harness design includes a path restricting cover with a through hole that allows liquid discharge and a connecting mechanism to enhance attachment reliability, featuring a covering portion with a radial through hole to prevent liquid accumulation and ensure secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the path restricting member is attached to the exterior member without additional attachments, then the device complexity is reduced, but the connection reliability deteriorates due to liquid accumulation causing detachment
Solution Approach 1:
The attachment member is divided into multiple functional parts: a body portion for covering the connection, a through hole for liquid discharge, and a restricting wall for positional constraint. This segmentation allows each part to perform its specific function independently, improving connection reliability without requiring a completely new complex structure
Solution Approach 2:
The attachment member acts as an intermediary component between the path restricting cover and the exterior member. It provides a mediating structure that prevents direct liquid contact between the connection parts while maintaining the mechanical connection, thus improving reliability without significantly increasing overall device complexity
2Reliability
If the path restricting member is tightly sealed without through holes, then liquid accumulation is prevented, but the harmful factor worsens due to liquid pressure buildup causing detachment
Solution Approach 1:
The harmful liquid is extracted from the system through the through hole in the attachment member. By providing a dedicated discharge path, the liquid that would otherwise accumulate and build pressure is continuously removed, preventing both accumulation-related detachment and pressure-related detachment
Solution Approach 2:
The through hole, which might seem to compromise the seal, actually converts the harmful liquid into a beneficial flushing mechanism. The liquid flowing through the hole prevents pressure buildup and carries away contaminants, transforming the harmful liquid into a cleaning agent that protects the connection
3Reliability
If the attachment member covers the entire outer circumference of the connection, then the connection reliability is improved, but the manufacturing precision requirement worsens due to alignment difficulties
Solution Approach 1:
The attachment member covers the connection area with sufficient overlap (extending beyond the connection outer circumference), providing excessive coverage that ensures reliability even with minor alignment variations. This partial excessive action compensates for manufacturing tolerances without requiring precise alignment
4Ease of operation
If the insertion port extends along the entire length of the first main body, then the ease of operation is improved for attachment, but the connection reliability worsens due to increased exposure to liquid
Solution Approach 1:
The solution moves the liquid discharge function to a different dimension by creating a through hole that passes radially through the attachment member body. This allows liquid to be removed in the radial direction, independent of the longitudinal insertion port, thus maintaining ease of attachment while preventing liquid-related reliability issues
Data Source
AI summary
A wire harness including: a wire harness main body including an electric wire and an exterior tube enclosing an outer circumference of the electric wire; a path restricting cover that is attached to an outer circumference of the exterior tube and restricts a path of the wire harness main body; and an attachment attached to an outer circumference of a portion in a lengthwise direction of the path restricting cover.