Delayed Unlocking Switch Assembly for Flat-Push Emergency Door Locks
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Solution Overview
Problem
Existing flat-push type emergency door-lock devices require different delayed unlocking functional components for different door-lock mechanisms, leading to increased preparation and installation costs.
Innovation Solution
A switching device for delayed unlocking function is introduced, which includes a switching-device base, a pushing swing arm, a linkage rod, a sensing assembly, a timing control assembly, and an electromagnetic traction assembly, installed separately from the original unlocking mechanisms, allowing the delayed unlocking function to be activated without altering the existing door-lock mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different delayed unlocking functional components are installed for different door-lock mechanisms, then the delayed unlocking function can be achieved, but the preparation and installation costs increase
Solution Approach 1:
The patent applies universality by designing a delayed unlocking device that can be installed on different types of door-lock mechanisms (flat-push type, lever type, etc.) without requiring different functional components. The device uses a universal installation interface that connects to various door-lock types through their common control lines, allowing one standardized delayed unlocking module to serve multiple door-lock applications, thereby reducing preparation and installation costs.
Solution Approach 2:
The patent segments the delayed unlocking function into independent modular components: a control unit with timing circuitry, a blocking mechanism with blocking member, and a release mechanism. This segmentation allows the delayed unlocking function to be implemented as a separate add-on module rather than requiring integration into each specific door-lock mechanism, reducing complexity and cost.
2Reliability
If the delayed unlocking function is integrated with the original unlocking mechanisms, then the function can be realized, but the original mechanisms must be modified increasing installation complexity
Solution Approach 1:
The patent extracts the delayed unlocking function from the original door-lock mechanism by providing a separate, independently installable device. The blocking member is positioned to interfere with the door-lock operation without being part of the original mechanism's internal structure. This extraction allows the delayed unlocking function to be added without modifying the original unlocking mechanisms, reducing installation complexity.
Solution Approach 2:
The patent introduces an intermediary blocking member that mediates between the door operation and the door-lock mechanism. The blocking member temporarily prevents the door from being opened during the delayed unlocking period, acting as a mediator that achieves the security function without requiring changes to the original lock mechanism's internal components.
3Ease of operation
If the blocking mechanism contacts the flat-push rod during operation, then the unlocking can be controlled, but the original mechanisms require contact movement increasing complexity
Solution Approach 1:
The blocking member serves as an intermediary that controls unlocking without requiring contact movement of the original door-lock mechanisms. It positioned to block the door opening path rather than interfacing with the push rod's movement, achieving control through spatial interference rather than mechanical contact, thereby reducing 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 reduces preparation and installation costs by enabling the delayed unlocking function without modifying the original unlocking mechanisms, ensuring compatibility across different door-lock devices.
Implementation Method 1
an electromagnetic traction assembly, configured to drag the pushing swing arm to cause the stopper to move from the stop position to the avoidance position after the preset time elapses
Data Source
AI summary
A switching device for delayed unlocking function, disposed at a flat-push type emergency door-lock device having a flat-push rod, including a switching-device base, a pushing swing arm, a linkage rod, a sensing assembly, a timing control assembly and an electromagnetic traction assembly. The pushing swing arm is disposed at the switching-device base and includes a stopper, being switchably maintained at an avoidance position in a delayed unlocking function disabled state and preset at a stop position in a delayed unlocking function enabled state. The timing control assembly starts timing when the sensing assembly senses the flat-push rod is pushed, and it makes the electromagnetic traction assembly to drag the pushing swing arm to cause the stopper to move from the stop position to the avoidance position after the timing reaches a predetermined delay time. When the stopper is at the avoidance position, the flat-push rod is avoided to allow the flat-push rod to continue to be pushed to complete unlocking.