Asymmetrical Current Switching Device Reducing Volume
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Solution Overview
Problem
Conventional current switching devices for portable machine tools occupy excessive space and material, making them bulky and costly due to their cylindrical design, which limits their ability to be compactly designed and expanded.
Innovation Solution
A current switching device with a curved slot and asymmetrical metal terminals buried in a base, where the switching element can rotate and swing, allowing for efficient use of space and increased stability through plastic injection molding, reducing material waste and enhancing structural integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cylindrical switching element is used to rotate 360 degrees, then the switching element can rotate smoothly, but the device occupies excessive space and material
Solution Approach 1:
The patent applies asymmetry by changing the switching element from a cylindrical shape to an L-shaped configuration. This asymmetric design allows the switching element to achieve the required switching function through a limited swing angle rather than full 360-degree rotation, significantly reducing the accommodating space needed in the base while maintaining smooth rotational movement capability
Solution Approach 2:
The switching element is segmented into distinct functional parts (first and second contact pieces positioned at different locations) that can make contact with different metal terminals during rotation. This segmentation allows the compact L-shaped design to achieve multiple switching configurations within a smaller volume compared to a cylindrical design
2Adaptability or versatility
If the switching element is disposed on the base and can rotate 360 degrees, then the switching function is achieved, but the overall volume can not easily be reduced
Solution Approach 1:
The L-shaped switching element creates an asymmetric configuration where the first and second contact pieces are positioned at different radial distances from the rotation axis. This asymmetric layout enables the switching element to connect different metal terminal combinations during its swing motion, maintaining versatile switching capability while occupying minimal space in the base
Solution Approach 2:
The switching element is designed to dynamically change its contact configuration through rotation around the pivot. The L-shaped design allows the contact pieces to dynamically engage with different metal terminals as the switching element swings, providing adaptability for various switching needs within a compact volume
3Ease of operation
If a cylindrical design of the switching element is used, then the switching element can rotate smoothly, but the dimension can not easily be decreased
Solution Approach 1:
The L-shaped switching element replaces the symmetric cylindrical design with an asymmetric configuration that is optimized for the specific switching requirements. This asymmetric form allows the switching element to achieve smooth rotation for the necessary angular range while having significantly reduced dimensions compared to a cylindrical design of equivalent functionality
Data Source
AI summary
The present invention discloses a current switching device and a method for manufacturing the same. The current switching device comprises a cover, a base, a plurality of metal terminals, a switching element, and at least two contact pieces; the base and the cover are combined with each other to form an accommodating space; the plurality of metal terminals are arranged in an asymmetrical shape and buried in the base; the switching element is disposed in the accommodating space; the two contact pieces are disposed on the switching element and comprises at least two contact points respectively, wherein all the contact points contact different metal terminals, and then each contact piece can conduct electricity between two metal terminals; the contact positions between the two contact pieces and the plurality of metal terminals can be changed by the rotary swing of the switching element, so as to switch the current direction.