Leakage Protector Self-Release Mechanism Power Loss Safety
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Solution Overview
Problem
Existing leakage protectors require energization to switch off and have a short service life due to mechanical wear, leading to potential safety hazards when power supply is interrupted or contact is poor.
Innovation Solution
A self-release type mechanical structure with a coil-powered release mechanism and a movable pressing plate that maintains contact through magnetic adsorption, ensuring disconnection of closing contacts even without energization, and incorporating elastic sheet contacts and a communication coil for reliable switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical self-locking structure is used in the leakage protector, then the structure can maintain a switched-on state, but when power supply is interrupted or contact is poor, the closing contacts cannot actively disconnect, resulting in loss of protection effect
Solution Approach 1:
The patent inverts the traditional self-locking mechanism by designing a self-release structure. Instead of requiring active force to release the lock, the system uses a spring-loaded release mechanism that automatically disengages when electromagnetic attraction ceases. This inversion ensures that power loss automatically triggers disconnection, resolving the contradiction between maintaining switched-on state and enabling active disconnection during power interruption.
Solution Approach 2:
The patent replaces the purely mechanical self-locking system with an electromechanical system. An electromagnetic coil generates magnetic field to maintain the locked state during normal operation, and when power is interrupted, the electromagnetic force disappears allowing the spring mechanism to automatically release the lock. This substitution enables active disconnection capability while maintaining reliability during powered operation.
2Duration of action of stationary object
If a mechanical self-locking structure is used, then the closing contacts can be maintained in connected state, but the mechanical wear reduces service life
Solution Approach 1:
The patent replaces frequent mechanical engagement and disengagement with an electromechanical system. The electromagnetic coil maintains the locked state without continuous mechanical friction, and the spring-based release mechanism reduces wear by eliminating the need for threaded fasteners and complex mechanical latches. This substitution extends service life while maintaining contact connection stability through the reliable electromagnetic-spring interaction.
3Reliability
If electromagnetic coil is used to maintain contact, then active protection during power loss is achieved, but device complexity increases
Solution Approach 1:
The patent merges the electromagnetic coil, spring mechanism, and locking components into an integrated assembly. The coil is positioned to directly interact with the locking components, and the spring is pre-loaded to work in conjunction with the electromagnetic force. This merging reduces the number of separate mechanisms needed, simplifying the overall structure while maintaining active protection capability during power loss.
Solution Approach 2:
The electromagnetic coil serves multiple functions: it maintains the locked state during normal operation, provides the force to overcome spring pressure, and its de-energization automatically triggers the release mechanism. The spring mechanism also serves dual purposes by providing both the release force and the locking engagement force. This multi-functionality reduces the need for additional components, thereby reducing device 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 enhances safety by ensuring active protection during power loss and extends the service life by reducing mechanical wear through stable and reliable electrical connections.
Implementation Method 1
the first iron core in an energized state is configured to be in magnetic adsorption fit with the movable pressing plate
Implementation Method 2
a coil is adopted to continuously supply power to attract the release mechanism
Data Source
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AI summary
The present disclosure discloses a leakage protector and relates to the technical field of electrical apparatus protection. The leakage protector includes a protector device, pins, a bottom plate and an elastic sheet. The protector device includes a communication maintaining device, a communication device and a locking device. The locking device includes an elastic sheet pressing block and a locking deflector rod. The locking device includes a latch a movable pressing plate and a hasp slide way, the latch, the movable pressing plate and the hasp slide way is provided on the locking deflector rod. The locking device includes a pressing rod, a hasp and a vertical fork groove, the pressing rod, the hasp and the vertical fork groove is provided on the elastic sheet pressing block.