Compact Magnetic Switch for Circuit Board Mounting
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Solution Overview
Problem
Existing magnetic switches used in alarm systems are too large for direct mounting on circuit boards, making them vulnerable to external magnet manipulation and lacking in compactness for integrated solutions.
Innovation Solution
Development of very compact magnetic switch assemblies with a base and cover forming a housing, including laterally spaced electrodes and a shiftable electrically conductive component that changes positions based on magnetic field conditions, allowing for direct mounting on circuit boards and enhanced security features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional magnetic switches are used, then reliable switch operation is achieved, but the switch size is too large for direct circuit board mounting
Solution Approach 1:
The switch is segmented into distinct functional components: a base with electrodes, a cover forming a housing, and a shiftable conductive component. This segmentation allows each component to be optimized for its specific function while contributing to overall compactness, enabling circuit board mounting
2Reliability
If larger magnetic switches are used, then reliable detection is achieved, but vulnerability to external magnet manipulation increases
Solution Approach 1:
The switch design incorporates preliminary anti-action by creating a controlled magnetic environment within the housing that resists external magnetic interference. The shiftable conductive component and electrode arrangement are configured to maintain reliable operation despite external magnet attempts, effectively countering the harmful manipulation before it can affect switch operation
3Volume of moving object
If compact switch design is implemented, then circuit board integration is enabled, but manufacturing complexity increases
Solution Approach 1:
The base and cover are merged to form an integrated housing structure that encloses and protects the shiftable conductive component. This merging reduces the number of separate parts while maintaining the necessary compact configuration for circuit board mounting, and the housing simultaneously provides structural support and protection against external manipulation
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 compact magnetic switch assemblies provide secure and reliable detection of unauthorized openings in door or window systems, while also being adaptable for use in proximity sensors, offering improved resistance to external manipulation and integration with circuit boards.
Implementation Method 1
shiftable between separate switch-operating positions depending upon the magnetic field conditions imposed upon the components
Implementation Method 2
The operating assembly serves to create a magnetic field condition to shift the component to the first switch position
Implementation Method 3
the switch comes into proximity with a metallic structure which magnetically couples with the shiftable component
Data Source
Figure 1~8
Figure 9~15
Figure 15A~18A
AI summary
Small, low-profile magnetic switch assemblies (26, 76, 126, 168) include a base (38, 78, 156) equipped with first and second laterally spaced apart switch electrodes, indentations (62, 102, 158) between the electrodes, and electrically conductive movable components (72, 110, 166), which are magnetically shiftable between a first switch position in simultaneous contact with the base electrodes, and a second switch position out of such simultaneous contact. The switch position of the component (72, 110, 166) is determined by the magnetic field conditions experienced by the component (72, 110, 166). The indentations (62, 102, 158) and associated shiftable components (72, 110, 166) permit the assemblies (26, 76, 126, 168) to be constructed as comparatively tiny units, which may be mounted on circuit boards.