Concealed Turn-Tilt Window Hinge With Adjustable Axis
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Solution Overview
Problem
Conventional concealed bottom hinges for turn-tilt windows have a tilting axis that is too high, limiting the tilting movement and opening angle, especially in low windows, and are difficult to mount, requiring skilled installation and potentially compromising the seal and security.
Innovation Solution
A concealed bottom hinge with a pair of scissors arms connected by a central hinge, where one arm is fixed to the frame with a peg and eye, and the other arm is shiftable on a mounting slat, allowing the leaf to tilt around a horizontal axis closer to the frame, with a projection to enhance security against break-ins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tilting axis is positioned high in conventional concealed hinges, then the mounting is simplified, but the tilting opening angle is limited and the seal may be damaged
Solution Approach 1:
The patent repositions the tilting axis from a high position to the lower edge of the mounting slat, effectively changing the dimensional location of the hinge axis. This dimensional change allows the window leaf to tilt with a greater opening angle while the seal remains protected from damage, as the lower axis position changes the geometry of the tilting motion.
2Ease of manufacture
If conventional concealed hinges are mounted, then the window can function, but the mounting process is complicated and requires skilled installers
Solution Approach 1:
The hinge is divided into separate components: a mounting slat that is first fixed to the frame, and then the hinge arms are attached to the slat. This segmentation allows the mounting process to be broken into simpler, more manageable steps that can be performed with basic tools and skills, reducing the need for highly skilled installers.
Solution Approach 2:
The mounting slat is pre-fixed to the frame before the hinge arms are attached. This preliminary action simplifies the overall mounting process by establishing a stable base first, making subsequent assembly steps easier and more straightforward for installers.
3Device complexity
If conventional hinge designs are used, then the structure is simple, but security against break-ins is compromised
Solution Approach 1:
A security projection is added to the mounting slat that protrudes into the path of potential intrusion tools. This preliminary security feature is built into the structure, preventing break-in attempts before they can succeed, while maintaining relatively simple overall hinge design.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Concealed hinge for a turn-tilt window with a fixed frame (2) and leaf (3), composed of a pair of scissors (25) with a first arm and second arm (26,27), that are connected by a central hinge (28) and which are hingeably connected by a first end (29, 30) to a mounting slat (31) that is intended to be mounted on the frame (2), and have a hinge (40, 47) at a second end (32, 33) for coupling to the leaf (3), characterised in that the first arm (26) is connected by its first end (29) to the mounting slat (31) with a fixed frame hinge (34) with a peg (35) that is fastened to the mounting slat (31) and the second arm (27) is connected by its first end (30) to the mounting slat (31) by a shiftable frame hinge (37) with a peg (38) that is shiftably affixed in a guide slot (39) of the mounting slat (31), whereby in the closed situation of the scissors (25), the mounting slat (31) serves as a support for the tilting movement of these scissors (25).