Current Detection Apparatus with Molded Bus Bar Positioning
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Solution Overview
Problem
Conventional current detection apparatuses that use resin to mold and integrate bus bars and detection elements complicate manufacturing and make it difficult to accurately position these components.
Innovation Solution
A current detection apparatus comprising a bus bar, a detection element, a shield member for magnetic shielding, and mold members that position and fix the bus bar and detection element with high accuracy, allowing for easy assembly and manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If resin is used to mold and integrate the bus bar and detection element, then integration is achieved, but manufacturing becomes complicated
Solution Approach 1:
The patent divides the integration structure into separate components: the bus bar and detection element are positioned independently using mold members, rather than being molded together as a single integrated unit. This segmentation simplifies manufacturing by allowing separate assembly of components while achieving the same integration function.
2Manufacturing precision
If resin molding is used to integrate components, then integration is achieved, but positioning accuracy deteriorates
Solution Approach 1:
The mold members are designed with pre-formed positioning portions that establish the correct spatial relationship between the bus bar and detection element before final assembly. This preliminary positioning action ensures high positioning accuracy without requiring complex integrated molding processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the easy manufacturing of current detection apparatuses with precise positioning of bus bars and detection elements, improving manufacturing efficiency and accuracy.
Implementation Method 1
a shield member that magnetically shields the detection element from an external magnetic field
Data Source
AI summary
A bus bar and a detection element uses resin to mold and integrate, leading to a disadvantage of complicating manufacturing. The bus bar is sandwiched and fixed between a second mold member and a first mold member. A sensor substrate on which a detection element is mounted is installed above the second mold member. The detection element is fixedly disposed at a position facing the bus bar, and detects a current flowing through the bus bar.