Integrated Relief Terminal in Junction Box Bus Bar
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Solution Overview
Problem
Conventional electrical junction boxes with relief terminal portions require a large number of parts, increasing costs and space requirements, making them inefficient for modern vehicles with size and density demands.
Innovation Solution
The relief terminal portion is integrated into the existing power supply distribution bus bar, protruding from the box body and exposed externally, eliminating the need for dedicated terminals and space, using existing components like a fuse part with an exposure window and cover member for connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated bus bar and attachment portion are separately provided to constitute the relief terminal portion, then the relief terminal portion can be provided with proper structure, but the number of parts increases and cost increases
Solution Approach 1:
The patent combines the bus bar and attachment portion into a single integrated bus bar structure. The relief terminal portion is formed by a specific configuration of the bus bar itself, eliminating the need for separate dedicated attachment portions. This merging reduces the number of parts while maintaining the structural integrity and functionality of the relief terminal portion.
Solution Approach 2:
The bus bar is designed to serve multiple functions: it acts as both the electrical conductor and the attachment structure for the relief terminal portion. The same bus bar component provides both electrical connection and mechanical attachment points, reducing the need for specialized separate components and lowering overall part count.
2Reliability
If a dedicated region is secured for the relief terminal portion, then the relief terminal portion can be properly accommodated, but the space requirement increases
Solution Approach 1:
The patent merges the space requirements for the bus bar and relief terminal portion into a single spatial footprint. By forming the relief terminal portion from the bus bar itself rather than as a separate component, the design eliminates the need for additional dedicated space, accommodating both functions within the existing bus bar allocation.
Solution Approach 2:
The bus bar is configured to extend in multiple dimensions, with specific portions protruding or positioned to form the relief terminal. This dimensional configuration allows the relief terminal functionality to be achieved within the existing spatial envelope of the bus bar, rather than requiring additional planar space.
3Reliability
If separate terminal portion and attachment portion are provided, then the relief terminal portion can be properly constituted, but space efficiency decreases
Solution Approach 1:
The patent merges multiple functional elements into a single bus bar component. The relief terminal portion is constituted by specific sections of the bus bar itself, combining the terminal function and attachment function in one integrated structure, thereby maximizing space efficiency within the electrical junction box.
Data Source
AI summary
Provided is an electrical junction box including a relief terminal portion having a structure in which the relief terminal portion can be constituted with a small number of parts and high space efficiency. The electrical junction box includes: a box body; and a power supply distribution bus bar that is disposed in the box body and includes a power supply input terminal portion and power supply branch terminal portions that are connected by a plate-shaped conducting portion. The relief terminal portion is constituted by at least a portion of the plate-shaped conducting portion of the power supply distribution bus bar being disposed in a state of protruding from the outer surface of the box body and exposed to the outside.