Single-Handle Tilt-Turn Window Fitting with Linkage Angle Limit
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Solution Overview
Problem
Existing tilt/turn windows require complex operation with multiple handles to limit tilt angles and lack structural simplicity and load-bearing capacity.
Innovation Solution
A single-handle mechanism with a structurally simple device that limits tilt angles using pivotally articulated handlebars, guide elements, and locking bars, allowing for stable and safe operation with enhanced burglary protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two different handles are operated to switch between turning position and tilting position, then the tilt angle can be limited, but the construction and operation become complex and complicated
Solution Approach 1:
The patent combines the functions of two separate handles into a single handle mechanism. The single handle controls both the turning and tilting operations through a unified linkage system that coordinates the movement of locking bars and guide elements, thereby reducing construction complexity while maintaining tilt angle limitation functionality
Solution Approach 2:
The single handle is designed to perform multiple functions: it controls both the turning position and tilting position, and also engages/disengages the tilt angle limitation mechanism. This multi-functional design eliminates the need for separate handles while ensuring reliable operation of all window positioning functions
2Reliability
If two different handles are operated to switch between turning position and tilting position, then the tilt angle can be limited, but the operation becomes complex and complicated
Solution Approach 1:
The patent merges the operation of two separate handles into a single handle, allowing the user to control both turning and tilting functions, as well as the tilt angle limitation, through one unified operation. This significantly simplifies the user interface and makes the window easier to operate
Solution Approach 2:
The single handle is designed with universal functionality to control multiple aspects of window operation including turning, tilting, and angle limitation. This multi-functional design reduces the number of operations required and improves ease of use while maintaining reliable tilt angle control
3Device complexity
If a simple tilt angle limiting device is used, then the structure is simple and easy to operate, but it may not reliably withstand greater loads
Solution Approach 1:
The patent employs dynamic linkages and articulated mechanisms that adapt to loading conditions. The linkage system with movable guide pieces and pivotally connected elements can dynamically adjust to distribute and withstand greater loads while maintaining structural simplicity and ease of operation
Solution Approach 2:
The patent utilizes parameter changes in the linkage geometry and positioning of guide elements to optimize the load-bearing capacity of the simple structure. By carefully designing the dimensions, angles, and material properties of the linkage components, the structure can reliably withstand greater loads despite its simplicity
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
Tilt and turn window (1) comprising a. a fixed frame (2) and a sash (3) movable relative to the frame about a tilt axis (X-axis) into a tilt position and about a rotation axis (Y-axis) perpendicular to the tilt axis (X-axis) into a rotation position, with a sash frame, b. wherein the frame (2) and the sash frame (31) each have two horizontally and two vertically adjustable frame members (201-204; 301-304), and c. a hardware arrangement (4) comprising a tilt and turn hardware and a device for limiting the tilt angle when opening the sash about the tilt axis, as well as an actuating device (46) for switching at least between a turn opening and a tilt opening of the sash (3), wherein d. the device for limiting the tilt angle comprises two link arrangements (47, 48) between the frame (2) and the sash frame (31), e.wherein one of the linkage assemblies (48) is arranged on the side of the axis of rotation between the frame (2) and the sash frame (31) and wherein one of the linkage assemblies (47) is arranged on an opposite side of the sash frame (3) between the frame (2) and the sash frame, and f. wherein the two linkage assemblies can each be detached from the sash (3) in different ways for rotary opening.