Vehicle Junction Box Partition Wall Guide Holes
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Solution Overview
Problem
Conventional electric junction boxes in vehicle engine rooms face issues with damage to wiring harnesses due to forced closure, which leads to bent or damaged wires, and increasing the gap between covers to avoid this results in a larger case size.
Innovation Solution
The electric junction box design includes a case with partition walls and guide holes that allow wiring harnesses to be passed through specific gaps, preventing external force on the wires and maintaining a compact size by ensuring the wires are not forcibly bent, with the partition wall height varying to accommodate aluminum wires securely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gap between the lower cover and partition wall is increased to avoid damaging electric wires, then wire damage is prevented, but the case capacity increases and overall size becomes larger
Solution Approach 1:
A guide hole is introduced as an intermediary structure to guide the wiring harness from the block through the partition wall to the external environment. This mediator allows the wire to pass through a designated path without requiring increased gap dimensions, thus preventing wire damage while maintaining compact case capacity
Solution Approach 2:
The partition wall is segmented by creating a guide hole through it, allowing the wiring harness to pass through the partition wall itself rather than requiring a gap between the partition wall and lower cover. This segmentation enables wire passage without increasing overall case dimensions
2Volume of stationary object
If the lower cover is forcibly closed to reduce case size, then case capacity is minimized, but external force is applied to the wiring harness and electric wires are damaged
Solution Approach 1:
The guide hole is pre-formed in the partition wall before assembly, and the wiring harness is routed through this guide hole in advance. This preliminary arrangement ensures that when the lower cover is closed, the wire already has a clear passage path and is not subjected to forcing or bending
Solution Approach 2:
The guide hole acts as a mediator that facilitates the wiring harness passage through the partition wall, allowing the lower cover to be closed without applying force to the wire, thus maintaining both compact size and wire integrity
3Adaptability or versatility
If multiple wiring harnesses are guided near the guide portion, then electrical connectivity is achieved, but the wiring harnesses interfere with each other and the lower cover cannot be closed
Solution Approach 1:
Multiple guide holes are created in the partition wall, allowing each wiring harness to have its own dedicated passage. This segmentation prevents interference between multiple wiring harnesses while enabling the lower cover to be closed properly
Solution Approach 2:
Instead of routing multiple wiring harnesses through the same gap space (2D arrangement), the invention uses multiple guide holes positioned at different locations on the partition wall (3D spatial arrangement), allowing wiring harnesses to pass through at different positions without interfering with each other
Data Source
AI summary
The present invention is to provide an electric junction box which can minimize a case by reducing the capacity of a cover without damage of electric wires. A wiring harness L2 guided from a power integration 3 arranged at a position nearest a guide portion is guided to a guide portion through a gap between a partition wall 42A and a lower cover 5. Further, a wiring harness L1 guided from another cassette block 2 is guided to the guide portion through gaps between the partition walls 42A-42C and peripheral walls 41A, 41E, 41F.