Switch-Coupled LED for Compact Power Tool Housing
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Solution Overview
Problem
Existing electric power tools face challenges in assembling a trigger switch and an illuminating LED within a compact housing, requiring excessive space for lead wires due to separate incorporation and assembly of these components.
Innovation Solution
The LED is coupled to the case of the switch and assembled together with it, allowing for preliminary electrical connection of lead wires, reducing the need for extra length and space, and enabling the LED to be releasably and rotatably attached for improved usability and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the switch and the lamp are incorporated separately in the housing, then the electrical connection can be ensured, but the assembling activity deteriorates and excessive space is required for lead wires
Solution Approach 1:
The lamp is coupled to the case of the switch, merging two previously separate components into a single integrated assembly. This allows the switch and lamp to be assembled together as one unit in the housing, improving assembly efficiency while maintaining electrical connection reliability through pre-connected lead wires
2Reliability
If the lead wires are made long enough to connect the switch and the lamp separately, then the electrical connection can be ensured, but the space for placing the switch and the lamp increases
Solution Approach 1:
By coupling the lamp to the switch case, the need for long lead wires is eliminated. The lead wires can be kept short and connected during the initial assembly of the switch-lamp unit, reducing the overall space required in the housing while ensuring reliable electrical connection
3Device complexity
If the lamp is fixed in a specific position, then the assembly structure can be simplified, but the usability and light direction control deteriorate
Solution Approach 1:
The lamp is rotatably coupled to the switch case, allowing it to rotate about its optical axis. This dynamic positioning capability enables the lamp to provide both fixed illumination and directional light control, improving usability while maintaining a relatively simple assembly structure through the rotational coupling mechanism
Data Source
AI summary
An electric power tool can include a switch and a lamp that is another member are incorporated in the housing, and the lamp is coupled to the case of the switch and assembled in the grip part integral with the switch.