Automotive Junction Box Fuse Module Vertical Tiering
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Solution Overview
Problem
Electrical junction boxes in automobiles face challenges with high space requirements due to overlapping wires from connector attachment portions, leading to increased wire protrusion and layout space, especially when connecting to both batteries and alternators.
Innovation Solution
The electrical junction box design features fuse attachment portions on one side face with connector attachment portions on a perpendicular side face, shifted in both vertical and horizontal directions to minimize wire overlap and reduce bend radius, utilizing L-shaped connectors and an opening window for visual inspection of soldering states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple connector attachment portions are arranged side by side in a side face of the box body, then space efficiency is improved, but wire overlap increases and wire protrusion distance increases
Solution Approach 1:
The patent transitions from arranging connector attachment portions in a single row (one-dimensional arrangement) to arranging them in multiple tiers vertically (two-dimensional arrangement). This dimensional change allows wires to be routed in different vertical levels, reducing wire overlap and protrusion distance while maintaining space efficiency.
Solution Approach 2:
The side face of the box body is segmented into multiple tiers vertically, with each tier containing connector attachment portions. This segmentation creates distinct routing zones for wires, reducing interference and overlap between wires from different connectors.
2Adaptability or versatility
If connector attachment portions are arranged to accommodate both battery and alternator connectors, then power supply versatility is improved, but wire routing complexity increases
Solution Approach 1:
By arranging connector attachment portions for battery and alternator in different vertical tiers, the patent provides versatile power supply options while simplifying wire routing. Wires from battery and alternator connectors can be routed in separate vertical zones, reducing routing complexity despite supporting multiple power sources.
3Length of moving object
If connector attachment portions are disposed in shifted positions in vertical direction, then wire overlap is reduced, but box body height increases
Solution Approach 1:
The patent utilizes the vertical dimension to arrange connector attachment portions in multiple tiers, which reduces wire overlap and protrusion distance. By efficiently packing the vertical space within the box body height constraints, the design achieves reduced wire protrusion without significantly increasing overall height.
Data Source
AI summary
An electrical junction box has a fuse module (40) with a plurality of fuse attachment portions (102) open into a first side face (132) and arranged side by side in a plurality of tiers that are placed one above another. A plurality of connector attachment portions (128) and (130) in which respective input terminals (90) and (96) of the fuse module (40) are disposed are provided so as to open into a second side face (134) that is perpendicular to the first side face (132), and are disposed in mutually shifted positions in a direction in which the tiers of the fuse attachment portions (102) are placed one above another.