Recessed Window Stop Device with Magnetic Actuation
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Solution Overview
Problem
Existing stop devices for limiting the closing movement of pivoting sashes beyond their closed position are not stable and often create obstacles or are prone to contamination, making them unreliable for long-term operation.
Innovation Solution
A stop device comprising a frame-side striker with a recessed stop surface and a wing-side stop unit with movable stops biased by a spring, utilizing magnetic elements to interact and prevent further pivoting beyond the closed position, ensuring a defined end position without relying on magnetic stability, thus maintaining stability and simplicity in design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stop device uses magnetic elements to limit closing movement, then the closing position is defined and over-pressing is prevented, but the magnetic elements may be unstable and create obstacles
Solution Approach 1:
The stop device is divided into two independent parts: a striker fixed to the frame and a stop unit fixed to the sash. This segmentation allows each part to be optimized for its specific function - the striker provides a stable reference point while the stop unit provides controlled limitation, eliminating the instability issue of integrated magnetic solutions
Solution Approach 2:
The patent replaces purely magnetic stopping mechanisms with a hybrid system combining magnetic attraction (for positioning) and mechanical engagement (the stop engaging the recess with stop surface). This substitution provides stable, reliable limitation while avoiding the obstacles created by protruding magnetic elements alone
2Reliability
If a stop device uses protruding components to limit movement, then the closing position is defined, but the components create obstacles and tripping hazards
Solution Approach 1:
The recess in the striker is nested within the frame structure, and the stop unit is nested within the sash assembly. When engaged, the stop fits into the recess, creating a compact configuration that does not protrude outward to create obstacles or tripping hazards, while still providing reliable movement limitation
Solution Approach 2:
The patent uses a mechanical engagement system where the stop engages a recess with a stop surface, rather than relying on protruding magnetic elements. This provides stable positioning without creating external obstacles, as the limiting mechanism is contained within the door assembly structure
3Reliability
If a stop device uses complex positioning aids, then the closing position can be limited, but the device complexity increases and assembly becomes difficult
Solution Approach 1:
The stop device is segmented into two simple, independent components: a striker with a recess and a stop unit with a movable stop. This segmentation simplifies both individual component design and assembly, while the coordinated interaction between the two parts provides reliable closing position limitation without complex mechanisms
4Device complexity
If a stop device uses integrated magnetic stopping, then the structure is simple, but the magnetic elements create instability and obstacles
Solution Approach 1:
By separating the stop device into a fixed striker and a movable stop unit, each component can be simplified in design while maintaining overall structural simplicity. The segmentation allows the magnetic elements to be used effectively for positioning without creating instability, as the mechanical engagement provides the stable stopping function
Solution Approach 2:
The patent combines magnetic positioning with mechanical stopping, replacing the need for complex integrated magnetic systems. This hybrid approach maintains structural simplicity while achieving stable, reliable operation through the mechanical engagement of the stop with the recess and stop surface
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 effectively limits the sash from pivoting beyond its closed position, ensuring easy and proper closure with high operational safety and durability, minimizing the risk of environmental interference and tripping hazards, while maintaining a barrier-free design.
Implementation Method 1
the magnetic elements interact with one another in such a way that the stop is moved into its extended position, engages in the recess and comes into contact with the stop surface
Data Source
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AI summary
The invention relates to a stop device (10) for limiting the closing movement of a sash (114) pivotable relative to a frame (102) beyond its closed position, wherein the stop device (10) comprises a frame-side strike plate (12) and a sash-side stop unit (14), wherein the strike plate (12) has at least one recess (20) with a stop surface (22) formed therein, wherein the recess (20) is formed to be recessed relative to a strike plate surface (24) and the strike plate (12) has a first magnetic element (30) adjacent to the recess (20), wherein the stop unit (14) comprises a housing (40) and at least one stop (46), wherein the stop (46) is movable relative to the housing (40) between a retracted position and an extended position and is biased into the retracted position, in particular by means of a spring (48).wherein the stop unit (14) has a second magnetic element (52) adjacent to the stop (46), the second magnetic element (52) being spaced apart from the stop (46) and coupled to it in motion. A door or window assembly (100) with such a stop device (10) is shown.