Espagnolette Lock Reversing Lever Anti-Tamper Mechanism
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Solution Overview
Problem
Existing espagnolette locks for double-leaf doors lack a flexible solution to enhance burglary security without requiring replacement of the lock, as they cannot easily switch between locked and unlocked modes to prevent unauthorized manipulation of the espagnolette rods.
Innovation Solution
The espagnolette lock incorporates a reversing lever and a blocking element that can be easily installed or removed to convert the lock between operating modes, using a coupling mechanism with a pivoted two-armed connector and a deflection lever to block the espagnolette rod's retraction and allow only one direction of rotation, enhancing security without needing to open the lock case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lock with locking mechanism is installed to prevent unauthorized manipulation of espagnolette rods, then burglary security is improved, but device complexity increases and requires lock replacement
Solution Approach 1:
The locking functionality is segmented from the main lock body and implemented as a separate blocking element that can be independently installed or removed. This blocking element is integrated into the existing coupling mechanism between the lock follower and espagnolette rod, allowing the locking function to be added without replacing the entire lock assembly.
Solution Approach 2:
The coupling mechanism is designed to serve multiple functions: it transmits the actuating force from the lock follower to the espagnolette rod during normal operation, and simultaneously provides a mounting structure for the blocking element that prevents unauthorized rod manipulation. This multi-functionality eliminates the need for separate locking mechanisms.
2Reliability
If a locking mechanism is integrated into the espagnolette lock, then burglary security is improved, but ease of manufacture and installation deteriorates
Solution Approach 1:
The blocking element is designed to be pre-installed or pre-positioned in the coupling mechanism during the manufacturing process. This preliminary action ensures that the locking functionality is already integrated into the lock assembly before installation, simplifying both manufacturing and installation processes while maintaining high security standards.
3Adaptability or versatility
If the lock is designed to allow easy switching between locked and unlocked modes, then adaptability is improved, but device complexity increases
Solution Approach 1:
The blocking element is designed with dynamic characteristics, allowing it to be easily installed or removed from the coupling mechanism. This dynamic design enables the lock to switch between locked and unlocked modes by simply adding or removing the blocking element, without requiring complex mechanical switches or additional actuating mechanisms.
Data Source
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AI summary
The driven bolt lock (10) has a coupling gear, which has a reversing lever (30) that is pivotally driven from a lock nut (16), where a free lever arm of the reversing lever is coupled to a pivot arm of a pivotally mounted two-armed connector (60). Another arm of the reversing lever is coupled with bolt rods (50). The bolt rod engages to the reversing lever in such a way that it drives and locks in an insertion direction of the coupling gear, counter to the opening direction.