Flat Electromagnet Locking Device for Sliding Door Guide Rails
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Solution Overview
Problem
Existing locking devices for door leaves are cumbersome, occupy the entire guide rail cross-section, limit movement to only one position, and cannot be easily driven over, posing difficulties during transportation of bulky objects.
Innovation Solution
A locking device with an electromagnet having a flat base body that occupies only the upper part of the guide rail, allowing the sliding element to move freely when the electromagnet is off and locking the door leaf in place when on, enabling multiple lockable positions and easy installation in existing guide rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking device occupies the entire cross-section of the guide rail, then the door leaf can be securely locked in position, but the door leaf cannot be moved further into the fully open position when locked
Solution Approach 1:
The guide rail cross-section is segmented into two functional zones: an upper functional space for the locking device and a lower guide space for sliding element movement. This spatial segmentation allows the locking device to occupy only the upper portion while leaving the lower portion accessible for door movement, resolving the contradiction between secure locking and movement flexibility.
Solution Approach 2:
The locking device is repositioned vertically within the guide rail cross-section, moving from a full-cross-section occupation to an upper-space occupation. This dimensional reorganization creates a vertical layering where the electromagnet operates in the upper dimension while the sliding element moves freely in the lower dimension, enabling both secure locking and door override capability.
2Reliability
If the locking device is designed with a traditional structure, then it can provide secure locking, but it cannot be driven over and requires disassembly for transportation of bulky objects
Solution Approach 1:
The locking device transitions from a static, immovable structure to a dynamic system where the armature can move vertically between the upper functional space and the lower guide space. When the door needs to be opened for bulky objects, the sliding element can push the armature upward, allowing the door to override the locking mechanism without disassembly, while maintaining secure locking during normal operation.
Solution Approach 2:
The armature serves as an intermediary element between the locking function and the door movement function. It can be attracted to the electromagnet for secure locking or pushed upward by the sliding element to allow door override, mediating between the conflicting requirements of locking security and ease of operation.
3Reliability
If the locking device occupies the entire guide rail cross-section, then locking is secure, but the design becomes complex and mounting becomes difficult
Solution Approach 1:
The guide rail is segmented into distinct functional zones (upper functional space for locking, lower guide space for movement), allowing the locking device to be mounted only in the upper portion. This reduces installation complexity compared to occupying the entire cross-section, while maintaining locking stability through proper spatial organization.
Solution Approach 2:
The guide rail structure is designed to serve multiple functions simultaneously: the upper functional space accommodates the locking device while the lower guide space enables sliding element movement. This multi-functional design reduces overall device complexity by integrating multiple functions into a single unified structure rather than requiring separate components.
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 allows for free movement of the door leaf to the open position even when locked, facilitating the transportation of bulky objects without the need to disassemble the locking device, while maintaining a simple and cost-effective design with extended functionality.
Implementation Method 1
an electromagnet (11) with an armature (12), which can be brought into a mechanical operative connection with the sliding element (20) for locking the door leaf (100)
Data Source
Figure 1a~1c
Figure 2~3c
Figure 4~5
AI summary
The invention relates to a holding device (10) for holding a door leaf (100) in a holding position (II) between an open position (III) and a closed position (I), wherein the door leaf (100) can be moved between the open position (III) and the closed position (I) by means of a sliding element (20) which engages longitudinally in a guide rail (200), comprising: an electromagnet (11) with an armature (12) which can be brought into a mechanical operative connection with the sliding element (20) for holding the door leaf (100) in the holding position (II) between the open position (III) and the closed position (I), wherein in an operating state (1) of the electromagnet (11) the sliding element (20) is lockable in the guide rail (200), and in a rest state (2) of the electromagnet (11) the sliding element (20) is freely movable in the guide rail (200).According to the invention, the electromagnet (11) has a flat base body (M) which can be arranged in an upper functional space (201) of the guide rail (200), so that the sliding piece (20) can be moved past the locking device (10) in a lower guide space (202) of the guide rail (200) in the operating state (1) of the electromagnet (11) in order to move the door leaf (100) from the locked position (II) to the open position (III).