Waterproof Toggle Switch With Precision Fit Clearance
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Solution Overview
Problem
Existing waterproof toggle switches compromise on operation convenience and increase manufacturing costs due to the need for additional waterproof covers, which are not effective in humid environments, posing safety hazards from electric leakage.
Innovation Solution
A waterproof toggle switch design featuring a panel with an opening portion, a rotatable shift lever, a fixed contact, and an elastic element, with a controlled fit clearance between the rotation center and opening portion, along with a flow guiding portion and snap joint, to prevent water ingress and ensure secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waterproof cover is added outside the switch, then waterproof performance is improved, but operation convenience is reduced and manufacturing cost increases
Solution Approach 1:
The patent merges the waterproof function directly into the switch body structure by designing the shift lever to rotate within the opening portion of the panel, eliminating the need for a separate waterproof cover. The shift lever's rotation center portion fits precisely within the opening portion, creating an integrated waterproof design that maintains operation convenience while achieving waterproof performance.
Solution Approach 2:
The patent extracts the waterproof cover from the overall switch structure and integrates its function directly into the panel and shift lever components. By taking out the separate waterproof cover and embedding waterproof functionality into the existing structural elements, the design reduces component count while maintaining protection against water ingress.
2Reliability
If a waterproof cover is added outside the switch, then waterproof performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple functions into fewer components. The panel's opening portion serves both as a structural element and a waterproof barrier, while the shift lever's rotation center portion acts as both a mechanical pivot and a sealing element. This merging reduces the number of parts that need to be manufactured, assembled, and inventoried, thereby lowering manufacturing costs.
Solution Approach 2:
The patent removes the separate waterproof cover component from the bill of materials and extracts its protective function into the existing panel and shift lever structures. This reduction in component count directly decreases manufacturing complexity, assembly time, and overall production cost while maintaining the required waterproof performance.
3Reliability
If a waterproof cover is added outside the switch, then waterproof performance is improved, but production cycle is prolonged
Solution Approach 1:
The patent merges the waterproof cover function into the main switch body components, allowing the panel and shift lever to be manufactured and assembled in the same production line without requiring a separate waterproof cover assembly step. This integration eliminates additional assembly operations and reduces the overall production cycle time.
Solution Approach 2:
The patent extracts the waterproof cover as a separate manufacturing step and combines its functionality into the existing component fabrication process. By taking out the separate cover production and integration step, the design streamlines the manufacturing process and reduces the total production cycle while maintaining waterproof performance.
4Reliability
If fit clearance between rotation center portion and opening portion is reduced, then waterproof performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by providing a stepped portion on the rotation center portion that creates a localized sealing interface within the opening portion. This stepped structure concentrates the waterproofing function at a specific location, allowing for controlled fit clearance at that critical interface while maintaining easier manufacturing tolerances for other portions of the components.
Data Source
AI summary
Provided is a waterproof toggle switch, which includes a panel, a shift lever, a fixed contact and an elastic element. The panel is provided with an opening portion, with the opening portion running through the panel, between a front wall surface and a rear wall surface of the panel. The shift lever is rotatably held in the opening portion of the panel, and the shift lever includes a rotation center portion, a driving portion and an operation portion. A fit clearance between the rotation center portion and the opening portion ranges from 0.02 mm to 0.2 mm. By providing the panel with the opening portion and providing the shift lever with the rotation center portion, and by controlling the fit clearance between the opening portion and the rotation center portion, a waterproof toggle switch having superperformance and a low cost is provided.