Elastic Rod Member Wire Harness Assembly
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Solution Overview
Problem
Conventional wire harness routing structures for motor vehicle movable structures like sliding doors or tailgates require complex and costly guide rails and accommodation boxes to prevent abnormal displacement, increasing part count and space usage.
Innovation Solution
A wire harness assembly with an electric wire featuring a fixed-side and movable-side connecting portion and an extension portion in a U-shape or arc, accompanied by an elastic rod member made of corrosion-resistant metallic material, which restricts abnormal displacement with its rigidity and elasticity, reducing the need for guide rails and accommodation boxes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guide rails or wire harness accommodation boxes are used to route the wire harness, then abnormal displacement of the extension portion is restricted, but the number of parts increases and production costs increase
Solution Approach 1:
The rod member integrates multiple functions: it serves as both a structural support element and a constraint mechanism for the wire harness extension portion. By combining the support and constraint functions into a single component, the patent eliminates the need for separate guide rails or accommodation boxes, thereby reducing part count while maintaining abnormal displacement restriction
Solution Approach 2:
The patent extracts the essential function of abnormal displacement restriction from complex guide rail or box structures and implements it through a simple rod member. The rod member provides the necessary constraint through its rigid structure and strategic positioning, removing unnecessary components while preserving the core functionality
2Reliability
If guide rails or wire harness accommodation boxes are used to route the wire harness, then abnormal displacement is restricted, but production costs increase
Solution Approach 1:
The rod member is designed as a simple, inexpensive component that can be easily manufactured and replaced if necessary. Its straightforward geometry and use of common materials make it far more cost-effective than complex guide rails or accommodation boxes, while still providing the required abnormal displacement restriction functionality
3Reliability
If guide rails or wire harness accommodation boxes are used to route the wire harness, then abnormal displacement is restricted, but routing space increases
Solution Approach 1:
The rod member acts as a thin, minimal-profile constraint element that provides abnormal displacement restriction without occupying significant routing space. Its slender structure allows it to be positioned along the wire harness path with minimal clearance requirements, unlike bulky guide rails or accommodation boxes
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
This configuration simplifies part structures, reduces production costs, and conserves space by using a single elastic rod member to control wire harness movement, enhancing safety and reliability with twisted metallic wires coated in resin for added corrosion resistance.
Implementation Method 1
an elastic rod member which is provided along the extension portion of the electric wire... having rigidity and elasticity sufficient to restrict abnormal displacement of the extension portion
Data Source
AI summary
A wire harness assembly includes an electric wire including: a fixed-side connecting portion to be fixed to a fixed structure; a movable-side connecting portion to be fixed to a movable structure which is movable with respect to the fixed structure; and an extension portion extended and flexed from the fixed-side connecting portion to the movable-side connecting portion in a substantially U-shape or arc shape, and having an extra length for allowing the movement of the movable structure. The wire harness assembly also includes an elastic rod member which is provided along the extension portion of the electric wire.