Window Frame Actuator With Snap-Action Trigger for Thin Profiles
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Solution Overview
Problem
Existing Dreh-Kipp type actuators for window and door frames have large dimensions, affecting installation in thin profiles, and lack aesthetic integration, with complex assembly and maintenance issues due to steel springs and design limitations.
Innovation Solution
A compact actuating device with reduced dimensions, featuring a snap-action mechanism and hidden components, including a fastening element, square shaft, trigger system, and decorative rosette, ensuring precise operation and minimal maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Dreh-Kipp actuators are used, then reliable window operation is achieved, but the device dimensions become large (exceeding 60mm width and 25mm height)
Solution Approach 1:
The patent implements nesting by placing the square shaft (1) inside the fastening element (2), and the trigger system (3) components nested within each other. The lower body (32) contains recesses (33) that receive protrusions (35, 45) from the upper body (31, 41), creating a compact nested structure that significantly reduces the overall device dimensions while maintaining functional integrity.
Solution Approach 2:
The patent transitions from a conventional radial spring arrangement to an axial elastic element (4) positioned along the rotation axis. This dimensional change allows the trigger system to be compacted in the radial direction while extending axially, fitting within thin window profiles and reducing the device's width and height dimensions.
2Ease of operation
If conventional actuators with visible components are installed, then functional operation is achieved, but aesthetic appearance deteriorates
Solution Approach 1:
The patent extracts the functional components from visible view by positioning them within the window profile cavity. The fastening element (2) anchors internally to the window panel, and the trigger system (3) with its upper body (31, 41) and lower body (32) is contained within the profile, leaving only minimal visible elements that blend with the window's aesthetic design.
3Force
If steel springs are used in the handle release system, then operational force is provided, but component wear increases and maintenance is required
Solution Approach 1:
The patent replaces the conventional steel spring mechanism with an elastic element (4) that operates axially rather than radially. This elastic element provides the necessary operational force through elastic deformation in the axial direction, eliminating the wear issues associated with radial steel springs while maintaining the required force for handle release operation.
4Reliability
If conventional actuators with multiple components are assembled, then complete functionality is achieved, but assembly complexity increases
Solution Approach 1:
The patent merges the upper body (31, 41) and lower body (32) of the trigger system into a unified assembly with the square shaft (1) and elastic element (4). The integral design of the upper body with the square shaft and the interlocking recesses (33) and protrusions (35, 45) create a consolidated structure that reduces the number of separate components and simplifies the assembly process while maintaining complete functionality.
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
Facilitates installation in thin profiles, enhances aesthetics, and provides reliable operation with reduced wear and maintenance needs, offering flexibility and adaptability to various window types.
Implementation Method 1
an elastic element 4, preferably a spring, which pushes the lower body 32 against the upper body 31, 41
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A device (20) for actuating windows and doors is described, comprising a fastening element (2) configured to be anchored to a window or door panel; a square shaft (1) rotating inside the fastening element (2); a trigger system (3) comprising an upper body (31, 41) integral with the square shaft (1) and a lower body (32) with a plurality of recesses (33); an elastic element (4) which pushes the lower body (32) against the upper body (31, 41), wherein the upper body (31, 41) has at least two protrusions (35) configured to fit into the recesses (33) made on the lower body (32) allowing a trigger movement during the rotation of the square shaft (1).