Bus Bar Fixing via Mechanical Pressing Ribs
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Solution Overview
Problem
Conventional current detection devices require thermal welding for fixing the bus bar to the housing, increasing manufacturing costs and necessitating specialized welding equipment.
Innovation Solution
The current detection device employs a housing with ribs and retaining portions to securely hold the bus bar in place without the need for thermal welding, using a plate-like bus bar, magnetic field detecting elements, and a magnetic member, allowing for assembly without welding equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thermal welding is used to fix the bus bar to the housing, then the bus bar is securely fixed, but welding equipment and specialized processes are required, increasing manufacturing cost
Solution Approach 1:
The patent replaces the thermal welding process with a mechanical pressing system. The housing includes pressing portions that apply mechanical force to press the bus bar against the magnetic member, securing it in place without requiring welding equipment or thermal processes. This substitution eliminates the need for specialized welding infrastructure while maintaining secure fixation.
Solution Approach 2:
The housing structure incorporates integrated pressing portions that automatically secure the bus bar during assembly through mechanical pressing. The design allows the housing itself to perform the fixation function without requiring external welding equipment or additional fastening components, simplifying the manufacturing process.
2Reliability
If thermal welding is used to fix the bus bar, then reliable fixation is achieved, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The patent replaces the complex thermal welding process with a simple mechanical pressing mechanism. The housing includes pressing portions that apply force to secure the bus bar during assembly, eliminating the need for welding equipment, temperature control systems, and specialized welding procedures. This mechanical approach simplifies the assembly process while maintaining reliable fixation.
3Strength
If thermal welding equipment is used, then secure fixation is achieved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive thermal welding equipment with a simple mechanical pressing system integrated into the housing. The pressing portions apply sufficient force during assembly to secure the bus bar reliably, eliminating the need for costly welding infrastructure, skilled welders, and specialized process equipment, thereby reducing manufacturing costs.
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
This solution reduces manufacturing costs and assembly time by eliminating the need for thermal welding, while maintaining the device's functionality and precision in detecting a wide range of current values.
Implementation Method 1
the Hall element outputs a voltage corresponding to a strength of the magnetic field
Data Source
AI summary
Provided is a current detection device capable of reducing manufacturing cost. A current detection device 1 includes a plate-like bus bar, a printed circuit board on which a magnetic field detecting element is mounted, a magnetic member, and a housing holding these components. The bus bar can be assembled into the housing by sliding in its longitudinal direction. The housing includes a first rib pressing the bus bar to restrict a movement in a thickness direction of the bus bar, a second rib pressing the bus bar to restrict a movement in a width direction of the bus bar, and a retaining protrusion fitting into a cutout portion provided at both sides in a width direction of the bus bar so as to retain the bus bar in a longitudinal direction of the bus bar.