Fuse Unit Bus Bar Terminal Installation Recess Design
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Solution Overview
Problem
Conventional fuse units have limited flexibility in installation patterns and wire lead-out directions due to the restricted space around the power supply connection portion, necessitating the use of L-shaped terminals and restricting the installation and lead-out options.
Innovation Solution
A fuse unit design featuring a bus bar with a power supply connection portion, output connection portions, and a terminal installation recess around the power supply connection portion, where the insulating protection portion is minimized to expose the necessary surfaces, allowing for installation and lead-out in multiple directions, including above, below, and rearward.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the insulating protection portion is disposed on the rear side of the power supply connection portion, then the structural strength is improved, but the degree of freedom in installation pattern and wire lead-out direction is reduced
Solution Approach 1:
The insulating protection portion is divided into multiple segments: a first insulating protection portion disposed on the front side of the power supply connection portion and a second insulating protection portion disposed on the rear side. This segmentation allows both the front and rear sides to be partially protected while maintaining structural strength and providing installation flexibility from multiple directions.
Solution Approach 2:
The solution transitions from a single-sided insulating protection approach to a multi-directional protection scheme. By adding the first insulating protection portion on the front side while maintaining the second portion on the rear side, the design enables wire lead-out in multiple dimensions (front, rear, above, below) rather than being restricted to limited spaces.
2Strength
If the insulating protection portion covers the outer periphery of the bus bar, then the strength of the fuse unit is increased, but the available space for installing connection terminals is reduced
Solution Approach 1:
Instead of providing complete insulating protection around the entire bus bar, the solution applies insulating protection selectively at specific locations. The first insulating protection portion is disposed on the front side and the second on the rear side, leaving other areas accessible for terminal installation. This local quality approach maintains necessary structural strength while preserving installation space.
Solution Approach 2:
The insulating protection is segmented into discrete portions rather than forming a continuous enclosure. This segmentation creates gaps and accessible areas around the power supply connection portion, allowing connection terminals to be installed from multiple directions (front, rear, above, below) while still providing protective coverage where structurally necessary.
Data Source
AI summary
A fuse unit includes a bus bar and an insulating protection portion. The bus bar has a power supply connection portion, an output connection portion, and a terminal installation recess provided around the power supply connection portion. The insulating protection portion is disposed on an outer surface of the bus bar so that portions of a surface of the bus bar in the power supply connection portion, the output connection portion, and the terminal installation recess are exposed from the insulating protection portion.