Loop-Shaped Wiring Harness for Compact Electric Supply Device Mounting
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Solution Overview
Problem
Conventional electric supply devices for motor vehicles face challenges such as increased protector height, costly leaf springs, and reduced bending durability due to limited mounting space and interference with vehicle components, especially when the harness fixing member is positioned deep within the vehicle body or close to the protector.
Innovation Solution
The electric supply device features a protector with a loop-shaped wiring harness and a spring member that absorbs slack by bending with a larger radius, allowing for compact mounting and reduced interference with vehicle components, using a ring-shaped wall to restrict bending angles and a projection for supporting the wiring harness to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the harness fixing member is positioned deep within the vehicle body or close to the protector, then the mounting space is reduced, but the wiring harness experiences excessive bending stress and reduced durability
Solution Approach 1:
The patent applies curvature by forming the wiring harness in a loop shape with a controlled bending radius. The ring-shaped wall structure provides a curved guide path that maintains adequate bending radius even in limited mounting spaces, preventing excessive stress concentration and improving durability.
2Ease of operation
If the leaf spring is made long and strong to absorb slack, then the slack absorption capability is improved, but the cost increases
Solution Approach 1:
The patent employs a dynamic loop-shaped wiring harness configuration that naturally absorbs slack through its geometric form rather than relying on an oversized leaf spring. The loop structure dynamically adjusts to door position changes, providing effective slack absorption with minimal additional components.
Solution Approach 2:
The ring-shaped wall acts as an intermediary structure that guides and constrains the wiring harness loop, enabling effective slack absorption through the loop geometry itself rather than requiring a larger, more expensive leaf spring.
3Length of stationary object
If the protector height is increased to accommodate components, then the component arrangement flexibility is improved, but the mounting space availability deteriorates
Solution Approach 1:
The patent transitions from a vertical arrangement (increasing protector height) to a horizontal loop configuration within the available space. The wiring harness is arranged in a loop shape that utilizes the depth and width dimensions of the mounting space rather than requiring additional height.
4Volume of moving object
If the wiring harness is arranged in a tight space, then the compactness is improved, but the interference with vehicle components increases
Solution Approach 1:
The loop-shaped wiring harness with controlled bending radius creates a compact arrangement that naturally maintains clearance from vehicle components. The curved path prevents sharp angles and tight constraints that would cause interference, while still achieving space efficiency.
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 enables compact mounting of the electric supply device, improves bending durability, reduces costs, and prevents noise and wear by allowing the wiring harness to smoothly operate within the vehicle without excessive bending stress.
Implementation Method 1
a spring member (14) which extends from the harness fixing part (12) in the opening direction of the slide door (41) and biases the wiring harness (13) in the closing direction of the slide door (41)
Data Source
AI summary
An electric supply device includes: a protector arranged in a slide structure; and a wiring harness guided out being bent from a harness fixing part situated in the protector toward a fixed structure, wherein the harness fixing part is situated in an opening direction of the slide structure, wherein the wiring harness is arranged in a closing direction of the slide structure from the harness fixing part, so that the wiring harness is bent nearly in a loop-shape in the protector when the slide structure is closed. A projection for supporting the wiring harness is provided in the proximity of an opening of the protector, from which the wiring harness is guided out toward the fixed structure.