Door Locking Unit With Sequential Swing Hook Self-Locking
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Solution Overview
Problem
Existing door locking systems, particularly multi-point locking systems, lack reliable and functionally safe self-locking mechanisms with increased burglary protection, often relying on complex mechanical release mechanisms that are susceptible to tampering.
Innovation Solution
A locking unit incorporating a pivotable swing hook bolt and a sliding latch bolt, where the swing hook bolt is activated only after the latch bolt reaches a partially extended position, ensuring secure self-locking with magnetic release and enhanced tamper resistance, eliminating the need for synchronous mechanical coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a magnetic release mechanism is used for self-locking, then automation and ease of operation are improved, but reliability and resistance to tampering may be reduced due to the use of magnets that can be influenced by external magnetic fields
Solution Approach 1:
The locking system is divided into two independent locking elements (latch bolt and swing hook bolt) that operate separately but complementarily. The latch bolt provides primary automatic locking via magnetic release, while the swing hook bolt provides secondary mechanical locking that is independent of magnetic fields, thereby segmenting the security functions to maintain both automation and tamper resistance
Solution Approach 2:
The system changes the operating principle from purely magnetic (vulnerable to external fields) to a hybrid magnetic-mechanical system. The swing hook bolt introduces a mechanical locking parameter that is insensitive to magnetic field interference, thereby changing the system's vulnerability parameters while maintaining automated operation
2Device complexity
If a single locking element is used, then device complexity is reduced, but burglary protection and security are insufficient
Solution Approach 1:
The locking function is segmented into two distinct elements: a latch bolt for automatic engagement and a swing hook bolt for secure mechanical locking. This segmentation allows each element to be optimized for its specific function while together providing enhanced security that exceeds what a single locking element could achieve
Solution Approach 2:
The patent merges two different locking mechanisms (latch bolt and swing hook bolt) into a single integrated locking unit. The latch bolt and swing hook bolt work together in sequence, combining their respective advantages to provide both automatic operation and high security, thereby achieving enhanced burglary protection without requiring entirely separate systems
3Speed
If the swing hook bolt is activated synchronously with the latch bolt, then locking speed is improved, but reliability is reduced due to potential interference and the need for precise mechanical coupling
Solution Approach 1:
The latch bolt is designed to engage first as a preliminary action, establishing the door in a pre-centered position. Only after the latch bolt has successfully engaged does the swing hook bolt become activated. This preliminary action ensures proper alignment and reduces the risk of interference, thereby improving operational reliability while maintaining acceptable locking speed
Solution Approach 2:
The system transitions from a static synchronous activation model to a dynamic sequential activation model. The timing and activation of the swing hook bolt are made dynamic, dependent on the actual engagement state of the latch bolt. This dynamic approach allows the system to adapt to slight variations in door positioning and closing speed, thereby improving reliability without significantly compromising locking speed
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 combination of a latch bolt and a swing hook bolt provides robust security by ensuring the swing bolt engages the strike plate only after the latch bolt pre-centers the door, enhancing burglary protection and manipulation resistance with a two-stage anti-return mechanism.
Implementation Method 1
the locking element can be actuated (e.g. by a release magnet) to automatically lock the locking unit such that the locking element releases the lock chain
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
This is a locking unit (1, 2) for a door locking system, in particular for a multi-point locking system, comprising at least: - a lock housing (22) mountable on a door leaf, e.g., on a lock faceplate (5); - a lock chain (4) slidable in the lock housing (22); - and at least one latch bolt (3) slidable in the lock housing (22), which has a chamfered actuating edge (14) associated with the strike plate (7) and is biased by a latch spring (13) in the direction of an extended locking position. This locking unit is characterized in that, in addition to the slidable latch bolt (3), a pivotable swing hook bolt (25) is mounted in the lock housing (22), which, for example,is coupled to the lock chain (4) in such a way that it can be moved with the lock chain (4) from a pivoted unlocking position to a pivoted locking position and vice versa, wherein the pivot bolt (25) is only moved to the pivoted locking position when the door leaf is in the closed position when the latch bolt (3) reaches a partially extended limit position in which the latch bolt (3) projects out of the lock housing (22) or over the faceplate (5) by a limit dimension (M2) which is greater than the unlock dimension (M1) in the unlock position.