Wire Harness Indicator Placement for Twist Detection
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Solution Overview
Problem
Existing wire harness attachment methods to vehicles often result in cable disconnection due to excessive tensional force from twisting, and conventional solutions require visually recognizable indicators that can disfigure the harness.
Innovation Solution
A wire harness design featuring an indicator placed on the back surface of the cable unit, positioned between fixation members or at branch points, which is visually unrecognizable from the normal attachment direction, allowing for twist detection without altering the harness's appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a criterial indicator (tape, rod-like member, marker) is provided on the outer circumference surface of the wire harness to enable twist detection, then twist detection capability is improved, but the wire harness becomes disfigured
Solution Approach 1:
The indicator is moved from the outer circumference surface to the back surface portion of the cable unit, utilizing a different spatial dimension (depth/layer) rather than adding to the external surface. This allows the indicator to serve its detection function while remaining hidden from the normal visual recognition direction, thus resolving the contradiction between detectability and aesthetics.
2Ease of operation
If the indicator is placed on the front surface portion for easy visual recognition, then detection ease is improved, but the wire harness appearance is degraded
Solution Approach 1:
Instead of placing the indicator on the visually prominent front surface, the indicator is inverted to the back surface portion. This inversion allows the indicator to be visually recognized when needed (from appropriate viewing angles) while being hidden from the normal attachment viewing direction, thus resolving the contradiction between ease of detection and aesthetic appearance.
Data Source
AI summary
A wire harness includes a cable unit, and an indicator is provided on a back surface portion of an outer circumference surface of the cable unit, the back surface portion being positioned on an opposite side to a front surface portion that is visually recognizable from a direction in which the wire harness is visually recognizable to a worker in a state in which the cable unit is attached to a vehicle.