Over Current Cut-Off Switch With Parallel Wire Current Branching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional over current cut-off switches face issues with the riveted point between the reed and conductive foot easily breaking due to material deformation under high current, leading to loss of conductivity.
Innovation Solution
The over current cut-off switch incorporates a copper alloy reed and connecting conductor with an electric wire that branches the current, reducing stress on the riveted point by distributing the current load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the reed and first conductive foot are riveted together, then the cut-off switch can be manufactured with simple structure, but the riveted point easily breaks under over current conditions
Solution Approach 1:
The electrical connection is segmented into two separate paths: the original riveted connection and a new parallel wire connection. This segmentation allows the current to be distributed across multiple pathways, reducing the stress concentration at the riveted point while maintaining manufacturing simplicity.
Solution Approach 2:
The electrical connection parameter is changed from a single rigid riveted joint to a combined structure including a flexible wire connection. This parameter change provides additional compliance and current distribution capability, preventing rivet breakage under over current conditions.
2Reliability
If the reed is made of copper alloy for conductivity, then the electrical conductivity is improved, but the material deforms easily under high current stress
Solution Approach 1:
The current path is segmented to distribute electrical load across multiple elements (reed, connecting conductor, and parallel wire). This reduces the current density and thermal stress on the copper alloy reed, preventing deformation while maintaining good conductivity.
Solution Approach 2:
The electrical connection system becomes a composite structure combining copper alloy reed (for conductivity) with additional conducting wire (for structural reinforcement and current distribution). This composite approach balances electrical performance with mechanical strength.
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 design effectively prevents the riveted point from breaking under over current conditions, ensuring reliable and repeated operation by distributing the current load through the electric wire and connecting conductor.
Implementation Method 1
The electric wire is cross-connected to both sides of a riveted point of the reed and the first conductive foot
Data Source
AI summary
An over current cut-off switch has an electric insulating housing, a first conductive foot, a second conductive foot, a reed, an electric wire and a switch button. The housing received upper portions of the first and second conductive feet, the reed and the electric wire. The button is configured on a top of the electric insulating housing. One end of the reed uses a connecting conductor to rivet to the first conductive foot. The other free end of the reed is separately connected to a top of the second conductive foot. The electric wire is mounted between the reed and the first conductive foot to be used as current branch. The switch button is configured on a top of the electric insulating housing. One side of a bottom of the switch button has a bump.