Sliding Door Wiring Harness Routing via Link Arm Stopper
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Solution Overview
Problem
Conventional power-supplying systems for sliding structures suffer from wiring harnesses swinging upward in the thickness direction of the link arm, leading to noise interference, malfunction, and reduced slack-absorbing performance, especially when the protector cover is absent.
Innovation Solution
A power-supplying system featuring a link arm rotatably supported by a rotating shaft with a torsion coil spring, a harness holding member at the link arm's tip, and a flexible wiring harness routed between the harness holding member and fixing portion via the protector base and the link arm's opposite wall, with a stopper to prevent excessive rotation and a circular wall surrounding the rotating shaft to reduce frictional resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wiring harness is routed along the link arm in a conventional power-supplying system, then electric power can be supplied to the sliding door, but the wiring harness swings upward in the thickness direction of the protector causing noise interference and malfunction
Solution Approach 1:
The routing path of the wiring harness is segmented into distinct sections: from the harness fixed portion along the link arm to the harness holder, then through the opening in the protector base to the vehicle body. This segmentation allows each section to be optimized independently, preventing unwanted swinging while maintaining power supply functionality
Solution Approach 2:
The opening in the protector base acts as an intermediary element that guides the wiring harness from the link arm side to the vehicle body side. This intermediary structure constrains the harness path, preventing it from swinging upward in the thickness direction while still allowing necessary movement for slack absorption
2Ease of manufacture
If the protector cover is absent to simplify the structure, then manufacturing cost is reduced, but the wiring harness may interfere with other parts and generate noise
Solution Approach 1:
The protective function previously provided by the cover is extracted and replaced by the routing structure itself. The opening in the protector base and the constrained path through the link arm area serve as the new protective mechanism, eliminating the need for a separate cover while maintaining protection against noise and interference
Solution Approach 2:
The wiring harness itself, with its flexible nature, is used as a protective element. By routing it through the constrained path defined by the link arm and protector base opening, the harness maintains flexibility for slack absorption while the routing structure prevents it from interfering with other parts
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents wiring harness interference, maintains harness slack-absorbing performance, and reduces noise and damage by keeping the harness straight and flexible, while ensuring effective operation of sliding doors and other machines.
Implementation Method 1
a metallic torsion coil spring 44 is attached to a shaft 50 of the link arm 43. The link arm 43 is urged upward by the coil spring 44.
Data Source
AI summary
A link arm is rotatably supported by a rotating shaft along a protector base, and urged in a harness-slack-absorbing direction by a torsion coil spring. A wiring harness is fixed to a harness-holding member at a tip end of the link arm and to a harness-fixing portion of the protector base, and routed flexibly between the harness-holding member and the harness-fixing portion via between the protector base and an opposite wall of the link arm opposite to the protector base.