Espagnolette Lock Single Drive Arc Assembly
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Solution Overview
Problem
Existing espagnolette locks for double-leaf doors are complex to assemble and require a large amount of space due to the two overlapping arcuate pieces in the drive device.
Innovation Solution
A simplified design where a single drive arc is used, accessible from the lock cylinder carrier, and the drive element penetrates the driver's movement range, allowing the connecting rod slide and latch to be driven with reduced component assembly and avoiding unwanted movement influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two arcuate pieces are used in the drive device, then the bolt forward movement and return movement can be transferred, but the assembly becomes complicated and requires a large amount of space
Solution Approach 1:
The patent merges the functions of two separate arcuate pieces into a single drive arc that performs both bolt forward movement and return movement transfer. This consolidation reduces the number of components and simplifies assembly while maintaining the complete movement transfer functionality.
Solution Approach 2:
The single drive arc is designed to serve multiple functions: it transfers both the bolt forward movement and the return movement, replacing what previously required two specialized arcuate pieces. This multi-functionality reduces device complexity while preserving operational capability.
2Ease of operation
If two arcuate pieces are used in the drive device, then the bolt forward movement and return movement can be transferred, but a large amount of space is required
Solution Approach 1:
By combining two arcuate pieces into a single drive arc, the spatial arrangement is optimized. The merged structure eliminates the need for overlapping components and reduces the overall area required for the drive device while maintaining complete movement transfer functionality.
Solution Approach 2:
The single drive arc utilizes the available space more efficiently by arranging its functional zones in an optimized spatial configuration, allowing both forward and return movement transfer within a compact area without requiring the extensive space needed for two separate arcuate pieces.
3Device complexity
If a single drive arc is used, then the assembly is simplified and space is reduced, but unwanted movement influences may affect the connecting rod connecting slide
Solution Approach 1:
The single drive arc is segmented into distinct functional zones: a first zone for transferring bolt forward movement to the connecting rod connecting slide, and a second zone for transferring return movement. This segmentation allows precise control of movements while maintaining the simplicity of a single integrated component.
Solution Approach 2:
The drive element acts as an intermediary component that interfaces with the drive arc and the connecting rod connecting slide. It mediates the movement transfer, ensuring that only desired movements are transmitted while blocking unwanted influences, thus maintaining reliability despite the simplified single-arc design.
Data Source
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AI summary
A rod lock (4), particularly for a double-leaf door, has a drive unit (21) in which a stop (25) of a drive element (23) is sandwiched over a stop (24) of a drive arc (22). These stops (24, 25) penetrate the movement range of a driver (13) of a lock cylinder, so that when the driver (13) is driven, the drive element (23) and the drive arc (22) can be driven. Thus, this rod lock (4) requires only a single drive arc (22).