Position Switch Actuator and Locking Mechanism Design
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Solution Overview
Problem
Existing position switches face challenges in achieving reliable switching behavior with a minimal component structure, particularly in separating actuation and locking mechanisms, which often require high magnetic forces and complex coil designs to ensure safe locking and unlocking, especially in scenarios where power failure affects accessibility and safety.
Innovation Solution
A position switch design that separates the actuation and locking mechanisms, using a plunger to block rotatable blocking elements via spring or magnetic force, allowing for secure locking and unlocking based on the actuator's presence, with the plunger attached to different active surfaces in rest and operating positions, enabling non-positive blocking and form-fitting connections to manage rotational movements and power states effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic force drive is used for locking and triggering switching elements, then locking reliability is improved, but device complexity and power consumption increase due to high-power coils being necessary
Solution Approach 1:
The patent segments the locking mechanism into two independent parts: a magnetic drive system for actuating the tumbler, and a separate spring-based locking system. The spring-loaded locking element provides the locking force independently of the magnetic drive, eliminating the need for high-power coils while maintaining reliable locking through the mechanical spring mechanism.
Solution Approach 2:
The patent replaces the magnetic force drive with a spring-based mechanical system for the locking function. The spring-loaded locking element provides reliable locking without requiring high-power magnetic fields, thus reducing coil complexity and power consumption while maintaining locking reliability.
2Reliability
If mechanical connection between actuator and switching elements is maintained, then switching reliability is improved, but ease of operation deteriorates due to long switching paths and high switching forces required
Solution Approach 1:
The patent extracts the switching function from the mechanical actuation path. The actuator mechanically actuates the tumbler, but the switching elements are triggered by the magnetic field changes during tumbling, not by direct mechanical connection. This eliminates long switching paths and high switching force requirements while maintaining reliable switching through magnetic field detection.
3Ease of operation
If guard locking is implemented with spring force drive, then ease of operation is improved during power failure, but device complexity increases due to additional components
Solution Approach 1:
The patent merges the spring-based actuation system with the locking mechanism. The same spring-loaded system that actuates the tumbler also provides the locking force through the locking element. This integration eliminates the need for separate high-power magnetic coils, reducing device complexity while maintaining ease of operation during power failures through the spring-based system.
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
This design ensures reliable and secure locking and unlocking, reduces the need for high-power coils, allows for a smaller and more versatile position switch design, and maintains accessibility during power failures by decoupling the actuating mechanism from the drive, thereby enhancing safety and operational efficiency.
Implementation Method 1
the plunger is provided in the operating position for attachment to an active surface of the first blocking element and in the rest position for attachment to an active surface of the second blocking element
Implementation Method 2
The actuator can be blocked by the magnetic force drive
Data Source
Figure 1~3
Figure 4~6
Figure 7
AI summary
The switch has a follower (1), where the follower is movable over a rotary locking element (3) by an actuator (2), from a rest position into an operating position. Another rotary locking element (5) blocks the former rotary check element by the follower. The follower is provided in operating position for accumulation of an effective area of the former locking element and in rest position for accumulation of an effective area of the latter locking element.