Window Security Cable with Thickened Ends for Space Saving
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Solution Overview
Problem
Existing window and door security elements, such as traction cables, are complex and costly, and fail to effectively absorb high forces and ensure safety without limiting the free space between the sash and frame.
Innovation Solution
A cost-effective security element featuring a cable with thickened ends that fit snugly through holes in fastening plates, allowing for easy assembly and production, with inclined bores and identical fastening plates for mirror-symmetrical design, and reinforced fastening plates for enhanced mechanical strength and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional cable security element is used with brackets and winding devices, then the cable can be tightened and secured, but the free space between sash and frame is limited and the structure becomes complex
Solution Approach 1:
The invention extracts and eliminates the winding devices from the security element structure. Instead of using complex brackets with winding mechanisms, the patent uses a simple cable with thickenings that pass through holes in the brackets, which are then deformed to secure the cable. This extraction of the winding function simplifies the overall structure while maintaining security functionality.
Solution Approach 2:
The security element is segmented into distinct functional components: the cable for tensioning, the thickenings for positioning and securing, and the brackets for mounting. This segmentation allows each component to be optimized independently and simplifies the overall assembly and installation process.
2Volume of stationary object
If brackets are attached offset to one another to avoid limiting free space, then installation space is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The brackets are designed with asymmetric hole positions relative to the bracket geometry, but the holes themselves are positioned to create a symmetric arrangement when both brackets are installed. This allows the thickenings to pass through both holes simultaneously while maintaining offset attachment positions that preserve free space. The asymmetric bracket design with specifically positioned holes simplifies manufacturing compared to fully symmetric designs with multiple adjustment options.
3Stability of the object's composition
If the cable is made tensioned in its inactive position to remain stable, then the cable stability is improved, but the pull-out resistance and mechanical strength are reduced
Solution Approach 1:
The cable is pre-tensioned in its inactive position to eliminate slack and ensure immediate stability when activated. The thickenings are positioned beforehand to engage with the brackets at optimal points. This pre-positioning and pre-tensioning ensures that when the security element is activated, the cable is already in a stable, load-ready state without requiring additional adjustment mechanisms that would compromise pull-out resistance.
Data Source
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AI summary
The invention relates to a window or door with a fitting arranged between the frame (14) and the sash (13), which allows for the adjustment of various axes (19). A locking element is securely mounted on the pivot side between the sash (13) and the frame (14) to prevent pull-out. This locking element is inactive during normal operation of the fitting and only becomes effective when the sash (13) is outside its permissible target positions relative to the frame (14). The locking element (1) consists of a cable (2) whose ends (9, 10) are provided with a thickening (11, 12) whose dimensions are larger than a bore (6) in a mounting plate (3, 4) through which the cable passes, in order to simplify the assembly and manufacture of the locking element (1).