Electrical Conduction Mechanism for Sheet Metal Pullers
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Solution Overview
Problem
Conventional sheet-metal pullers experience deviations in center of gravity when used laterally due to the weight of power source cords, leading to unstable fulcrums and reduced workability, along with wear and dust accumulation affecting electrical conduction efficiency.
Innovation Solution
An electrical conduction mechanism with a conductive member featuring a first through-hole and a perpendicular second through-hole, incorporating an electrical-conduction chip and coil spring, and a spacer for non-conductive isolation, ensuring stable and sealed electrical conduction to the bit, even when used laterally, preventing dust accumulation and maintaining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power source cord is attached to the cord connection portion continuously connected to the handle, then electrical conduction can be performed, but the position of the center of gravity deviates when used in lateral position due to the weight of the power source cord
Solution Approach 1:
The electrical conduction function is extracted from the handle area and relocated to the shaft. The power source cord connection is moved from the handle to the shaft, separating the electrical conduction function from the handle structure. This extraction resolves the center of gravity deviation issue by positioning the electrical components in the shaft where they do not affect the handle's balance when used laterally.
2Reliability
If the cord connection portion and clamping means are in pivotal contact, then electrical conduction is achieved, but wear and scratches occur on contact surfaces requiring replacement
Solution Approach 1:
The mechanical pivotal contact system is replaced with a sliding contact system. Instead of pivotal contact between the cord connection portion and clamping means, the invention uses a sliding contact between the power source cord and the shaft. This substitution eliminates the wear and scratch issues associated with pivotal contact while maintaining electrical conduction functionality.
3Ease of operation
If the clamping means of the power source cord is exposed outside, then connection is achieved, but dust adheres to the clamping bodies reducing electrical conduction efficiency
Solution Approach 1:
The electrical conduction components are nested within the shaft structure. The power source cord connection is integrated into the shaft's internal structure, with the cord sliding through the shaft's interior. This nesting protects the electrical contact surfaces from dust and contaminants while maintaining electrical conduction efficiency, as the contact surfaces are enclosed within the shaft rather than exposed to the external environment.
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
The solution stabilizes the center of gravity during lateral use, reduces hand fatigue, and maintains high-frequency operation with improved electrical conduction efficiency by preventing dust ingress and wear, ensuring good workability and prolonged equipment life.
Implementation Method 1
a coil spring biasing the electrical-conduction chip toward the shaft
Implementation Method 2
an electrical-conduction chip abutting on the shaft... so that current is supplied to the shaft through the electrical-conduction chip to conduct electricity to the bit
Data Source
AI summary
An electrical conduction mechanism is provided to prevent dust or from adhering to the inside of an electrical-conduction portion main body, so that electrical conduction efficiency cannot be reduced. The electrical conduction mechanism comprises an electrical-conduction portion main body in the center of which a first through-hole to be inserted through by a shaft is formed and in which a second through-hole communicating with the first through-hole is formed in a direction perpendicular to a direction in which the first through-hole is formed. The electrical-conduction element is disposed in the second through-hole. The electrical-conduction element is configured to include an electrical-conduction chip abutting on the shaft, and a coil spring biasing the electrical-conduction chip toward the shaft, so that current is supplied to the shaft through the electrical-conduction chip to conduct electricity to the bit.