Concealed Window Restrictor for Tilt and Turn Mechanisms
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Solution Overview
Problem
Current window restrictors for tilt and turn windows are surface-mounted, making them visually obtrusive and difficult to implement on inwardly-opening windows, as they cannot adapt to the linear tilting and arcuate turning movements, and existing solutions do not provide a concealed, aesthetically pleasing option.
Innovation Solution
A window restrictor design that incorporates a stay with a hooked end and a slider mechanism, where the stay is resiliently biased to engage a stud or peg, allowing for restricted window opening while being concealed within the gap between the window frame and panel, with aesthetically pleasing surface-mounted components that match the window's color and minimize visual impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a window restrictor is surface-mounted to provide functional visibility, then the restrictor can be easily installed and maintained, but it becomes visually obtrusive and aesthetically displeasing
Solution Approach 1:
The window restrictor is nested within the gap between the window frame and window panel. The mounting part attaches to the frame, and the stay mechanism operates within the existing gap space, concealing the restrictor components from external view while maintaining full functionality.
Solution Approach 2:
The invention moves the restrictor from a surface-mounted two-dimensional configuration to a three-dimensional configuration that utilizes the depth of the gap between frame and panel. This dimensional transition allows the restrictor to be hidden within the gap volume while maintaining its restraining function.
2Shape
If a window restrictor is concealed within the gap between frame and panel to improve aesthetics, then visual appearance is enhanced, but the restrictor may become difficult to access for maintenance or adjustment
Solution Approach 1:
The window restrictor is segmented into distinct components: a mounting part attached to the frame, a stay mechanism with pivot point, and a control element. This segmentation allows individual components to be accessed or replaced independently through the gap opening, facilitating maintenance while maintaining concealment.
Solution Approach 2:
The control element of the restrictor is extracted to be accessible through the gap opening, allowing users to operate or adjust the restrictor mechanism without requiring full access to the internal components. This selective extraction maintains aesthetics while enabling maintenance.
3Reliability
If the stay is resiliently biased towards extended position to provide automatic window restriction, then the window opening is automatically limited for safety, but the window cannot be fully opened for emergency egress or cleaning
Solution Approach 1:
The stay mechanism is designed with dynamic characteristics - resiliently biased towards the extended restricted position for normal safety operation, but capable of being manually moved to the retracted position when full opening is required. This dynamic design allows automatic safety restriction while maintaining adaptability for emergency or cleaning situations.
Solution Approach 2:
The resilient bias provides automatic window restriction without requiring active control systems or power sources. The mechanism self-regulates window opening to safe limits through the resilient force, providing reliable automatic safety while allowing manual override when necessary.
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
The solution provides a concealed, aesthetically pleasing window restrictor that effectively limits window opening without compromising accessibility or visibility, addressing the need for a functional and visually appealing solution for tilt and turn windows.
Implementation Method 1
the stay being resiliently biased relative to the first mounting part towards its extended position
Data Source
AI summary
This invention relates to a window restrictor, primarily for use upon a tilt and turn window. The window has a window frame (2) and a window panel (1) which is movable relative to the frame between a closed position and an open position, the window panel having a lip (90) which overlies a part of the window frame when the window panel is closed. The window restrictor has a first mounting part (16; 116) adapted for mounting upon an edge (9) of the window frame in the gap between the window frame and the window panel, a stay (20; 120) pivotably mounted upon the first mounting part, the stay comprising a beam (32) and a hooked end (34; 134), the hooked end being adapted to engage and retain a peg (36; 136) mounted upon the window panel, the stay being resiliently biased relative to the first mounting part, a second mounting part (12; 112) adapted for mounting upon the edge (9) of the window frame adjacent to the lip (90) of the window panel, a slider (14; 114) which is movably mounted upon the second mounting part, the slider having a control member (84; 184) adapted to lie underneath the lip and to engage the stay. When used with a tilt and turn window the peg may be the stud of the tilt and turn mechanism.