Telescopic Window Fitting With Extension Rail
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Solution Overview
Problem
Existing fitting arrangements for windows and doors face challenges in adapting to various sash sizes without high costs, material wastage, and limited flexibility, especially with telescopic fittings that can be cumbersome and asymmetrically actuated.
Innovation Solution
A telescopic fitting arrangement featuring a gear rod and locking rod with an extension rail that can be coupled for increased length, an end cover for secure installation, and a coupling mechanism allowing for adjustable and robust configuration, ensuring compatibility with conventional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If telescopic fittings are used to adapt to different sash sizes, then versatility is improved, but the maximum length change is limited and accessibility problems occur
Solution Approach 1:
The fitting arrangement is divided into modular components: a base telescopic fitting assembly and detachable extension rails. The extension rails can be coupled to the locking rod to increase the overall length, allowing the system to adapt to larger sash dimensions while maintaining the compact base design.
Solution Approach 2:
The extension rail is designed to be coupled to the locking rod in a nested configuration, where the extension rail attaches to the functional section of the locking rod. This nesting approach allows the extension rail to extend the reach of the fitting without adding excessive bulk or complexity to the base structure.
2Adaptability or versatility
If telescopic fittings are extended to reach inaccessible ends, then coverage is improved, but the minimum length remains too great causing protrusion
Solution Approach 1:
The fitting arrangement incorporates a telescopic mechanism that allows dynamic adjustment of the locking rod length. The gear rod and locking rod can slide relative to each other, enabling the fitting to be compact when retracted and extended when needed, thus avoiding protrusion while maintaining coverage capability.
Solution Approach 2:
The separation of the base fitting assembly from the optional extension rail allows the system to be installed in a compact configuration for small sashes, while the extension rail can be added only when larger sashes require additional reach. This segmentation eliminates the need for the minimum length problem to affect all applications.
3Adaptability or versatility
If drive rod is manufactured oversize and cut to size, then adaptability is improved, but labor and material waste increase
Solution Approach 1:
The extension rail is designed as a universal component that can be coupled to the locking rod to provide additional length. Rather than manufacturing custom-length drive rods for each application, the same standard-length locking rod can be combined with extension rails as needed, eliminating material waste while maintaining adaptability.
Solution Approach 2:
The overall length of the fitting arrangement is adjusted by changing the configuration rather than the base component dimensions. The locking rod maintains a standard length, and the extension rail provides the additional length parameter when required, avoiding the need to manufacture oversize components and cut them to fit.
4Strength
If end cover is added to cover free end sections, then robustness is improved, but device complexity increases
Solution Approach 1:
The end cover is integrated with the extension rail assembly, serving both as a protective cover for the free end section and as part of the structural connection system. The end cover is coupled to the faceplate rail, merging the protective function with the mounting structure rather than adding a completely separate component.
Data Source
Figure 1~3
Figure 4~6
Figure 7
AI summary
The arrangement (10) has a transmission rod and a locking bolt (12) displaceable or decoupled relative to each other, and coupled to one another in a driven manner in a mounted state. The bolt comprises a functional section at an end facing away from the transmission rod, where the functional section comprises functional elements for coupling with an additional component or a frame. An extension rail (14) comprises a functional section functionally formed as the functional section of the bolt such that the bolt is coupled with the extension rail by a safety device i.e. cover strip. The functional elements consist of a locking pin (16), a rod end (18), oblong holes (20, 20') and holes (22, 22').