Magnetic Rotary Switch Assembly for Waterproof Underwater Control
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Solution Overview
Problem
Traditional rotary switches for submerged applications are complex and expensive to manufacture, with rotating shafts and O-rings introducing failure points and reliability issues in harsh environments.
Innovation Solution
A waterproof switch assembly using a waterproof housing with a nonferrous switch interface wall, a rotary switch, and magnetic bodies to transfer torque without penetrations, eliminating the need for O-rings and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional rotary switches with O-ring seals are used for submerged applications, then environmental protection is provided, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent removes the rotary shaft and O-ring seal components from the switch assembly, extracting the problematic mechanical elements that required complex environmental sealing. The magnetic coupling system operates without these components, eliminating the need for complex rotating seals while maintaining waterproof integrity.
Solution Approach 2:
The patent replaces the traditional mechanical rotary shaft connection with a magnetic coupling system. The magnetic field transfers rotational force through the housing wall without physical penetration, substituting mechanical contact with electromagnetic interaction to achieve both simplicity and environmental protection.
2Force
If traditional rotary switches with rotating shafts are used, then torque transmission is achieved, but reliability decreases due to failure points
Solution Approach 1:
The patent introduces a magnetic field as an intermediary to transmit torque between the external environment and the internal switch mechanism. The magnetic coupling acts as a mediator that transfers rotational force without creating physical penetration points or rotating shafts that could fail.
Solution Approach 2:
The patent replaces the mechanical rotating shaft system with a magnetic coupling system that transmits torque through magnetic attraction and repulsion forces, eliminating mechanical failure points while maintaining effective torque transmission for switch operation.
3Reliability
If O-ring seals are used to protect against environmental intrusion, then waterproofing is provided, but manufacturing cost increases
Solution Approach 1:
The patent extracts the O-ring seal components from the design, eliminating the need for specialized sealing materials and assembly procedures. This removal of complex sealing components simplifies the manufacturing process and reduces material costs while maintaining waterproof integrity through the magnetic coupling design.
4Adaptability or versatility
If rotary shafts with environmental seals are used, then submerged operation is enabled, but device complexity increases
Solution Approach 1:
The patent replaces the complex mechanical rotary shaft and environmental seal system with a magnetic coupling system. The magnetic field penetrates the housing wall to enable submerged operation without requiring complex mechanical sealing arrangements, thereby maintaining adaptability while reducing complexity.
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 provides a reliable, cost-effective, and compact underwater switch assembly that maintains operation in deep water pressures with improved reliability and reduced complexity.
Implementation Method 1
a first magnetic body within the dry cavity and coupled between the switch shaft and the nonferrous switch interface wall, and a second magnetic body external from the waterproof housing and adjacent the nonferrous switch interface wall in alignment with the first magnetic body so that rotation of the second magnetic body rotates the switch shaft
Data Source
AI summary
An underwater device may include a waterproof housing defining a dry cavity and having a nonferrous switch interface wall. The underwater device may include a rotary switch within the dry cavity and including a switch body, and a switch shaft extending outwardly from the switch body. The underwater device may include a first magnetic body within the dry cavity and coupled between the switch shaft and the nonferrous switch interface wall, and a second magnetic body external from the waterproof housing and adjacent the nonferrous switch interface wall in alignment with the first magnetic body so that rotation of the second magnetic body rotates the switch shaft. Each of the first magnetic body and the second magnetic body may include a permanent magnet.