Electromagnetic Safety Switch Actuator for Gap-Free Door Locking
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Solution Overview
Problem
Existing safety switches with electromagnetic lock mechanisms face challenges in maintaining close contact between the attracting surface and the surface to be attracted, leading to inadequate magnetic force due to gaps, which can result in unintended door openings and potential safety hazards.
Innovation Solution
A safety switch design featuring an actuator with a magnetized member and a movement mechanism that offsets the surface to be attracted relative to the actuator attachment portion, ensuring close contact with the attracting surface when the door is closed, thereby maintaining a gap-free state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed mounting position is used for the actuator, then the device complexity is reduced, but gaps may form between the attracting surface and surface to be attracted, reducing magnetic force
Solution Approach 1:
The actuator is designed with a movable mounting structure that allows dynamic adjustment of its position relative to the switch body. The actuator can move in the direction of the attracting surface to eliminate gaps, transforming a static mounting system into a dynamic one that adapts to ensure close contact for reliable magnetic locking.
Solution Approach 2:
The movement mechanism is configured to automatically offset the actuator toward the attracting surface before the electromagnetic lock is activated. This preliminary action ensures that the surface to be attracted is already in close contact with the attracting surface, preventing gap formation during operation.
2Reliability
If the actuator is positioned to ensure close contact, then magnetic force is enhanced, but the device complexity increases due to the movement mechanism
Solution Approach 1:
A movement mechanism acts as an intermediary between the actuator and the switch body, enabling the actuator to adjust its position. This intermediary component facilitates close contact between the attracting surfaces while maintaining a modular structure that manages the added complexity through functional decomposition.
Solution Approach 2:
The position parameter of the actuator is made variable through the movement mechanism, allowing adjustment in the direction of the attracting surface. This parameter change enables the system to optimize magnetic contact pressure and eliminate gaps, enhancing reliability while the mechanism manages the complexity of position control.
3Ease of manufacture
If a simple fixed actuator is used, then ease of manufacture is improved, but gaps may cause unintended door openings
Solution Approach 1:
The actuator incorporates a movable mounting structure that allows it to dynamically adjust its position toward the attracting surface, eliminating gaps that could cause unintended door openings. This dynamic adjustment maintains manufacturing simplicity while preventing harmful effects.
Solution Approach 2:
The movement mechanism performs a preliminary action to offset the actuator and eliminate gaps before the door locking function is activated. This preliminary anti-action prevents the harmful effect of unintended door openings by ensuring reliable magnetic contact is established in advance.
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 a high-level close contact state between the attracting surface and the surface to be attracted, enhancing the magnetic force and preventing unintended door openings, thus improving safety and reliability.
Implementation Method 1
an electromagnet and an actuator magnetized member that is attracted to the electromagnet
Implementation Method 2
The electromagnet is driven such that the actuator magnetized member is attracted to the electromagnet, thereby forming a door-locked state
Data Source
AI summary
The close contact between a surface to be attracted and an attracting surface when an openable and closable door is closed is established at a high level to form a state in which the surface to be attracted and the attracting surface overlap each other without a gap. An electromagnetic lock type safety switch includes an actuator including; a member to be magnetized on which a surface to be attracted corresponding to an attracting surface, formed on an electromagnet of a switch body, is formed; an actuator attachment portion for attaching the actuator to a movable portion (openable and closable door); and a movement mechanism supporting the member to be magnetized to be movable relative to the actuator attachment portion.