Separate Switching Device for Delayed Unlocking in Flat-Push 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 due to the need for modifications to the original unlocking mechanisms.
Innovation Solution
A switching device is introduced that includes a mobile assembly, sensing assembly, timing control assembly, and electromagnetic traction assembly, which are installed separately from the door-lock base, allowing the delayed unlocking function to be activated without altering the original unlocking 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 due to modifications of original unlocking mechanisms
Solution Approach 1:
The delayed unlocking function is segmented into a separate switching device that is independently installed on the door-lock base, rather than being integrated into the door-lock mechanism itself. This allows the switching device to be universally applied to different door-lock mechanisms without requiring modifications to the original unlocking mechanisms.
Solution Approach 2:
The delayed unlocking functional components (sensing assembly, timing control assembly, mobile assembly) are extracted from the original door-lock mechanism and placed in a separate switching device. This extraction eliminates the need to modify the original unlocking mechanisms while still achieving the delayed unlocking function.
2Adaptability or versatility
If the delayed unlocking functional components are integrated with the door-lock mechanism, then the unlocking function can be modified, but the device complexity increases
Solution Approach 1:
The system is divided into two independent parts: the original door-lock mechanism and the new switching device. The switching device contains all the additional components (sensing assembly, timing control assembly, mobile assembly with stopper) needed for delayed unlocking, while the original door-lock mechanism remains unchanged, thus avoiding increased complexity in the internal mechanisms.
3Reliability
If the original unlocking mechanisms are modified to add delayed unlocking function, then the delayed unlocking function is achieved, but the ease of operation deteriorates due to contact movement between mechanisms
Solution Approach 1:
The delayed unlocking functionality is completely extracted from the original door-lock mechanism and implemented in a separate switching device. The mobile assembly's stopper interacts with the flat-push rod at a different location, avoiding any contact movement with the original internal mechanisms, thereby maintaining ease of operation.
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, while adhering to fire regulations by allowing a predetermined delay before unlocking.
Implementation Method 1
an electromagnetic traction assembly (6), wherein the electromagnetic traction assembly (6) is used to drive the mobile assembly (1)
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, a switching-device base, a mobile assembly, a linkage rod, a sensing assembly, a timing control assembly and an electromagnetic traction assembly. The mobile assembly is disposed at the switching-device base and includes a stopper, being switchably maintained at an avoidance position 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 mobile assembly 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 linkage rod is avoided to allow the flat-push rod to continue to move to complete unlocking.