Panic Lock Latch Bolt Control via Retaining Element
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Solution Overview
Problem
Existing panic locks for escape and rescue routes are complex and prone to incorrect operation, lacking simplicity and high security against manipulation, especially when the door is open.
Innovation Solution
A panic lock design featuring a latch bolt and auxiliary latch with a retaining member that interacts with a slide, allowing the latch bolt to be controlled through its positions, ensuring the latch bolt does not extend fully when the door is open, and incorporating springs for automatic extension when the door is closed, providing a simple yet secure mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex lock mechanism with multiple levers is used to prevent incorrect operation, then security against manipulation is improved, but device complexity increases
Solution Approach 1:
The patent extracts the essential security function from a complex multi-lever mechanism and implements it through a simplified structure with a latch bolt, auxiliary latch, and retaining element. The retaining element selectively blocks the slide's movement path to prevent full extension when the door is open, while allowing full extension when closed, thereby achieving high security against manipulation with minimal components.
Solution Approach 2:
The slide acts as an intermediary component that translates the position of the latch bolt into control of the auxiliary latch. When the latch bolt moves between extended positions, the slide moves accordingly, and the retaining element uses this slide movement to indirectly control whether the auxiliary latch can extend, providing a simple yet effective control mechanism.
2Reliability
If the latch bolt is allowed to extend fully in all positions, then locking capability is improved, but incorrect operation risk increases
Solution Approach 1:
The retaining element is positioned to preemptively block the slide's movement path before the auxiliary latch can extend when the door is open. This preliminary blocking action prevents the harmful condition of full latch bolt extension in the open position from occurring in the first place, rather than attempting to correct it after the fact.
Solution Approach 2:
The system dynamically adjusts the blocking function of the retaining element based on the door position. When the door is closed, the slide moves to a position where the retaining element does not block the path, allowing full extension. When the door is open, the slide position causes the retaining element to block the path, preventing full extension. This dynamic behavior ensures correct operation under different conditions.
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 design achieves a structurally simple and compact lock mechanism with high functional reliability against incorrect operation, ensuring the latch bolt only extends fully when the door is closed, thus enhancing security and usability.
Implementation Method 1
A first spring is also mounted in the lock case and urges the latch bolt into the extended, third position
Implementation Method 2
A second spring is mounted in the lock case, which pushes the auxiliary latch into the extended position
Data Source
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AI summary
The invention relates to a lock for a preferably two-leaf door. The lock has a lock case having a lock mechanism supported therein. The lock mechanism comprises a latch bolt (2) and a slide (5), which is mechanically coupled to the latch bolt (2). The latch bolt (2) can assume three positions, specifically a first retracted position, a second extended position, and a third far extended position. In order to control the extension of the latch bolt (2) from the extended second position of the latch bolt to the far extended third position, the lock has a retaining element (4), which is movably supported in the lock case and which interacts with an auxiliary latch (3) and the slide (5). The retaining element (4) can be moved between a blocking position, in which the retaining element (4) protrudes into the movement path of the slide (5) and prevents movement of the latch bolt (2) from the extended second position to the far extended third position, and a non-blocking position, in which the retaining element (4) is outside the movement path of the slide (5) and permits the movement of the latch bolt (2) from the extended second position to the extended third position.