Window Safety Device Direct Rod Guide
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Solution Overview
Problem
Existing window designs with fail-safe devices require a cover rail and tight tolerances, making it challenging to integrate a mishandling safety device when the driving rod is not covered, leading to increased structural complexity and difficulty in installation.
Innovation Solution
The design features a drive rod guided directly by an undercut profile groove with a bearing block that holds a pawl, allowing for direct attachment to the window frame or wing, eliminating the need for a faceplate and simplifying the construction and installation of the mishandling device, which includes a pawl supporting the drive rod in the locked position and using a spring element for prestressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover rail is used to mount the mishandling safety device, then the device can be integrated, but the structural complexity increases and installation becomes more difficult
Solution Approach 1:
The patent extracts the mishandling safety device from the traditional cover rail mounting system and integrates it directly into the bearing block, which is already part of the connecting rod mechanism. This eliminates the need for a separate cover rail while maintaining the safety function, thereby reducing structural complexity without compromising reliability
Solution Approach 2:
The patent merges the mishandling safety device with the bearing block, combining two previously separate components into one integrated unit. The pawl mechanism for detecting window position is now housed within the bearing block itself, simplifying the overall structure and reducing the number of separate parts needed
2Reliability
If tight tolerances are required for the cover rail arrangement, then the safety device functions properly, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs a spring element that automatically prestresses the pawl into the locking position, creating a self-adjusting mechanism. This elastic prestressing compensates for manufacturing tolerances and wear, allowing the safety device to function reliably without requiring extremely tight manufacturing precision for the bearing block and pawl assembly
3Device complexity
If the drive rod is not covered, then the structure is simpler, but the mishandling device cannot be integrated
Solution Approach 1:
The patent combines the safety device mounting function with the existing bearing block that supports the connecting rod. By integrating the pawl mechanism into the bearing block, the system maintains structural simplicity (no cover rail needed) while achieving reliable safety device integration, as the bearing block serves dual purposes
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 solution enables a simple and efficient integration of the mishandling device without a cover rail, reducing structural complexity and installation effort while maintaining effective locking and release functionality, suitable for various window configurations and sizes.
Implementation Method 1
which includes a pawl supporting the drive rod in the locked position and using a spring element for prestressing
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The window has a failure switching safety device (11) designed in a blocking position in a leaf (2) that is distanced from a frame (1) and in a release position in the leaf lying in the frame for releasing a movement of a longitudinal movable connecting rod (6). The rod is guided directly from an undercut profile groove (13), such that a bearing bracket (14) has a bearing for a safety catch (15). The safety catch has a unit for supporting of the rod in a blocking position. Fixing units are arranged for direct attachment in the window at ends of the bearing bracket arranged adjacent to the rod.