Espagnolette Lock Nut Triggering Mechanism
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Solution Overview
Problem
Existing espagnolette locks face challenges in utilizing stored energy without moving the leaf against the frame, particularly due to large tolerances between the sash and frame, which can prevent the button from being actuated.
Innovation Solution
The triggering device is coupled to the movement of the nut, allowing the stored energy to be released by actuating the nut, providing an alternative method for energy utilization, and the nut has two actuation directions to control the espagnolette lock's operation, with a decoupling mechanism to fully utilize energy when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the triggering device is designed to release energy only when the leaf moves against the frame, then the locking mechanism is simple, but the energy store cannot be utilized when large tolerances prevent button actuation
Solution Approach 1:
The nut is given dual functionality: it serves both as the actuating element for unlocking the espagnolette (first direction) and as a trigger for releasing the energy store (second direction). This multi-functionality allows the same component to perform multiple operations, ensuring reliable energy release regardless of whether the leaf movement triggers the button or the nut is manually actuated.
Solution Approach 2:
The system transitions from a static triggering mechanism (button fixed to leaf) to a dynamic one where the nut can be actuated in two different directions. The first direction engages the espagnolette unlocking mechanism, while the second direction engages the triggering device for energy release. This dynamic design provides operational flexibility to handle various installation conditions and tolerance variations.
2Use of energy by moving object
If the nut is coupled to the connecting rod in both directions, then the locking mechanism is simple, but the energy store cannot be fully utilized without decoupling
Solution Approach 1:
The coupling between the nut and connecting rod is segmented into two distinct functional paths: one for unlocking the espagnolette and another for triggering the energy release. The triggering device includes a separate button and lever mechanism that can be actuated independently by moving the nut in the second direction, allowing full energy utilization without interfering with the primary locking function.
Solution Approach 2:
A button mounted on the nut serves as an intermediary element that transfers the motion from the nut to the triggering device. When the nut is actuated in the second direction, the button moves and actuates the triggering lever, which then releases the energy store. This intermediary mechanism enables clean decoupling of the energy release function from the primary locking mechanism.
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 enhances the espagnolette lock's functionality by allowing energy release through nut actuation, ensuring the lock can engage the energy store without frame movement, and simplifies the structural coupling, enabling efficient energy utilization and locking mechanisms.
Implementation Method 1
The energy store has a compression spring, which is supported on a fixed housing and a bracket angled from the espagnolette
Implementation Method 2
The holding device has a pivotable clamping lever that holds the drive rod in a non-positive manner in one direction of movement
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
In a rod lock (3) for locking a sash (2) that pivots against a frame (1), an energy storage device (15) can be controlled in two ways. A release device (13) for controlling the energy storage device (15) detects the position of the sash (2) relative to the frame (1). Alternatively, the release device (13) can be controlled by actuating a cam (30) of the rod lock (3). This allows the rod lock (3) to be locked particularly conveniently.