Window Protective Fitting Anti-Twist Locking Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing window protective fittings can be manipulated by unauthorized individuals through twisting of the adapter head when the protective fitting is in the closed position, as the adapter head is not secured against rotation.
Innovation Solution
A protective fitting for windows that includes a base body attached to the window frame with a receiving chamber for a rotatable adapter head, featuring a locking mechanism with a contact surface on the closure element that engages with the adapter head to lock it in a rotationally fixed position, providing additional security against twisting. This can include parallel or angled contact surfaces and a nose-like projection for enhanced torque resistance, and optionally an electromagnetic locking element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the adapter head is made accessible from the outside when the protective fitting is closed, then the window can be operated from the inside, but the adapter head can be twisted by unauthorized persons from the outside
Solution Approach 1:
The adapter head is segmented into multiple angular positions (e.g., 0°, 90°, 180°, 270°) with each position having a corresponding contact surface. The closure element is correspondingly segmented with matching contact surfaces that engage with the adapter head segments, locking it in specific angular positions and preventing unauthorized rotation.
Solution Approach 2:
The adapter head features an asymmetric design with contact surfaces positioned at specific angular intervals rather than a symmetric continuous circumference. This asymmetric segmentation creates discrete locking positions that prevent twisting while maintaining operational functionality when properly aligned.
2Reliability
If contact surfaces are added to lock the adapter head against rotation, then security against twisting is improved, but the structural complexity increases
Solution Approach 1:
The contact surfaces for anti-rotation locking are merged into the existing closure element structure rather than being separate components. The closure element is formed as a single piece that integrates both the locking function and the anti-rotation contact surfaces, eliminating the need for additional separate locking mechanisms.
Solution Approach 2:
The closure element serves multiple functions: it closes the receiving chamber, provides the locking mechanism for the adapter head, and simultaneously provides contact surfaces for preventing rotation. This multi-functionality reduces the need for separate components and minimizes structural complexity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The safety fitting (1) comprises a base body (4) attachable to a window frame (2), in which a receiving chamber (8) is formed with an adapter head (10) that is rotated by an insertable rotating handle (12), and acts over a drive shaft (14) of a closure mechanism (16) for closing the window. A contact surface is provided at a closure element (18), which cooperates in a form-fit manner with the adapter head in closed position and is locked in a torque-proof manner in the receiving chamber.