Double-Leaf Door Rod Lock Pre-Assembled Module
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Solution Overview
Problem
Existing espagnolette locks for double-leaf doors are complex to assemble and operate reliably due to large tolerances in air gaps between leaves, requiring intricate component interactions and assembly processes.
Innovation Solution
A one-piece design for the trigger and control element with a preassembled module, including a spring element, simplifies assembly and operation by ensuring reliable positioning and reduced structural complexity, with the spring element integrated within the bolt and a pin for holding the control element in place, and a control ramp for direct actuation of the projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional multi-component locking mechanism is used, then the locking device can be actuated from the opposite leaf, but the assembly complexity and structural effort increase significantly
Solution Approach 1:
The control element and trigger are merged into a single integrated component. The control element forms the trigger body, eliminating the need for separate trigger components and reducing assembly steps while maintaining the ability to actuate the locking device from the opposite leaf
2Reliability
If multiple separate components are used for the locking mechanism, then each component can be optimized independently, but the number of components and assembly steps increases
Solution Approach 1:
The control element, trigger, and spring element are combined into a pre-assembled module that is inserted as a single unit into the locking device. This reduces the total number of components while maintaining positioning reliability through integrated design and pre-assembly testing
Solution Approach 2:
The control element, trigger, and spring element are pre-assembled and pre-tested as a complete module before installation. This preliminary assembly ensures proper positioning and function, eliminating the need for complex on-site assembly and adjustment
3Adaptability or versatility
If the locking mechanism uses multiple separate parts, then flexibility in design is improved, but the structural effort and manufacturing cost increase
Solution Approach 1:
The control element and trigger are manufactured as a single integrated piece, reducing manufacturing steps and material requirements while maintaining design flexibility for the overall locking system. The integrated design eliminates the need for separate manufacturing and assembly of multiple small components
4Ease of manufacture
If the control element is not pre-positioned, then assembly is more flexible, but the operation reliability decreases due to tolerance accumulation
Solution Approach 1:
The control element is pre-positioned and pre-assembled with the trigger and spring element in a fixed configuration before installation into the locking device. This preliminary positioning eliminates tolerance accumulation that would occur with separate assembly steps, ensuring reliable operation while maintaining assembly flexibility through modular installation
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
This design reduces assembly complexity, ensures reliable operation by maintaining the locking device in a blocking position with greater holding force than the spring force, and simplifies movement into a release position, while minimizing component count and facilitating easy fault diagnosis.
Implementation Method 1
the spring element biases the control element towards the release position
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A rod lock (4), particularly for a double-leaf door, has a lock case (5) arranged in a first leaf (2) with a bolt assembly (20) and an actuating device (8) arranged in a second leaf (3) for actuating the bolt assembly (20). The bolt assembly (20) has a bolt (9) with a protruding control element (17). The control element (17) is integrally connected to a release (22) of the bolt assembly (20). This allows the bolt (9), control element (17), and release (22) to be manufactured as a pre-assembled module (23).