Switchable Tilt-Turn Bearing for Window Sash
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Solution Overview
Problem
Existing window and door systems with automatic fittings lack the ability to open or close by rotating around a vertical axis, limiting their functionality compared to tilt-only mechanisms.
Innovation Solution
A window or door system featuring a switchable tilt and turn bearing that allows the sash to be moved both horizontally into a tilt position and vertically into a rotary open position, using a drive system with a chain subjected to tensile and compressive loads, and incorporating switchable finger latches and a concealed controller for enhanced functionality and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a window uses a traditional tilt-only mechanism with motor-operated locking elements, then the window can be automatically opened and closed in a tilted position, but the opening movement is limited and cannot rotate around a vertical axis
Solution Approach 1:
The patent applies a universal tilt-turn bearing that can perform both tilting and rotating functions within a single mechanism. The bearing is designed with a pivotable sash connection that allows movement about both a horizontal axis (for tilting) and a vertical axis (for rotating), eliminating the need for separate tilt and turn mechanisms. This multi-functional bearing resolves the contradiction by providing extended opening capabilities while avoiding the complexity of multiple independent fitting systems.
Solution Approach 2:
The patent implements a dynamically switchable bearing mechanism where the tilt-turn bearing can be switched between different operational modes (tilt mode and turn mode) via a controller. The bearing's capability to change its functional state based on control signals allows the window to adapt its opening behavior dynamically, providing versatility without requiring permanently complex mechanical structures for both functions simultaneously.
2Adaptability or versatility
If a window uses a switchable tilt and turn bearing with a drive system, then the window can be opened in both tilt and rotary positions, but the drive system requires a chain subjected to tensile and compressive loads
Solution Approach 1:
The patent employs a dynamic chain system that changes its mechanical properties based on operational mode. The chain is designed to be bendable in one direction and can switch between tensile load carrying (for tilting operations) and compressive load carrying (for rotating operations). This dynamic adaptation of load-bearing characteristics allows the same chain to serve multiple functions without requiring excessive strength in all directions, resolving the contradiction between versatility and strength requirements.
Solution Approach 2:
The patent changes the mechanical parameters of the chain system based on operational mode. The chain's effective stiffness, load-bearing direction, and structural configuration are adjusted according to whether the window is in tilt mode or turn mode. This parameter switching allows the chain to be optimized for the specific operational requirements of each mode, providing versatility while maintaining adequate strength characteristics for each individual function.
3Adaptability or versatility
If a window uses multiple switchable components (tilt-turn bearing, finger latches, drive), then the functionality is extended, but the number of components increases
Solution Approach 1:
The patent merges multiple functions into integrated assemblies. The tilt-turn bearing combines both tilting and rotating capabilities in a single mechanism. The finger latches are integrated with the drive system and control unit, forming a unified locking and actuation assembly. The drive system itself integrates motor, chain, and control electronics into a compact unit. These merging strategies extend functionality while minimizing the number of separate components, resolving the contradiction between versatility and complexity.
Solution Approach 2:
The patent employs universal components that perform multiple functions. The controller serves as a universal control unit that manages the tilt-turn bearing, finger latches, and drive system. The drive mechanism provides universal actuation capability for both tilting and rotating operations. This multi-functionality at the component level reduces the total number of specialized components needed, achieving extended functionality without proportionally increasing component count.
Data Source
Figure 1A~2C
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AI summary
Window (1) or door, with a frame (2) in which a sash (3) is received, wherein the sash (3) can be moved into an open position via a drive (12), wherein the sash (3) is mounted on the frame (2) via a switchable tilt-and-turn bearing and the sash (3) can be moved via the drive (12) either about a horizontal axis (5) into an open tilt position or about a vertical axis (7) into a turn-open position.