Drawer Wiring Harness Guide for Predictable Loop Radius
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Solution Overview
Problem
Wiring harnesses in appliance drawers, such as refrigerators, wear prematurely due to frequent opening and closing, which disrupts the electrical connections and reduces the reliability of the user interfaces.
Innovation Solution
The use of wiring harness guides that orient the wiring harness at a specific angle and geometry to maintain a predictable loop radius, minimizing stress on the harness when the drawer is opened and closed, thereby extending its lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wiring harnesses are used to deliver power and signals to drawer electrical devices, then electrical connectivity is established, but the wiring harnesses wear prematurely due to frequent drawer opening and closing
Solution Approach 1:
A cable assembly guide is introduced as an intermediary component between the wiring harness and the drawer movement path. The guide redirects the cable assembly to travel along the side wall of the drawer rather than directly with the drawer front, reducing flexing and wear on the harness while maintaining electrical connectivity to all drawer devices
Solution Approach 2:
The cable assembly routing is changed from a direct front-to-back path to a three-dimensional path that travels along the side wall of the drawer. This dimensional change in cable routing reduces the bending radius and flexing frequency of the wiring harness, thereby extending its lifespan while maintaining functional connectivity
2Ease of manufacture
If wiring harnesses are routed directly with drawer movement, then installation is simple, but the harness flexing and rubbing causes premature wear
Solution Approach 1:
The cable assembly guide serves as a mediating structure that simplifies installation by providing a predefined routing path along the drawer side wall. This guide ensures proper cable orientation and positioning during assembly while protecting the wiring harness from excessive flexing and rubbing, thus improving both installation ease and long-term durability
Data Source
AI summary
A traveling harness system is provided for an appliance to maintain electrical connections between the appliance and a drawer, while allowing the drawer to move. Wiring harness guides formed in the drawer force the wiring harness to maintain a predictable and desirable loop radius to reduce stress on the wiring harness, which prevents the wiring harness from prematurely wearing.