Concealed Corner Bearing Tilting Axis Inversion
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Solution Overview
Problem
High-quality windows with concealed corner bearings often experience pinching or squeezing issues when tilted, especially with heavy sashes, due to the sash overlap pressing against the frame, and existing designs may limit the tilting angle and increase the risk of defects.
Innovation Solution
The corner bearing design features a tilting axis positioned as low as possible, often below the pivot pin or top of the support arm, with independent alignment from the pivot axis, and includes a load transfer device and recesses to facilitate wide tilting without increasing installation space, thereby reducing pinching and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tilt bearing axis is arranged off-center and offset from the pivot axis in a sash-side hardware unit, then the tilting function is achieved, but pinching or crushing may occur and the opening angle in the tilted position is limited
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the tilting axis below the pivot pin rather than above it. This inversion changes the mechanical leverage and force distribution, preventing the sash overlap from pressing against the frame during tilting operation, thus eliminating the pinching problem while maintaining the tilting function
Solution Approach 2:
The patent extends the tilting mechanism into a new spatial dimension by placing the tilting axis in the vertical direction below the pivot pin, rather than only in the horizontal plane. This dimensional change allows the sash to tilt without the overlap contacting the frame, increasing both the tilting angle and reliability
2Device complexity
If the tilting axis is positioned higher, then the tilting mechanism is simplified, but the sash overlap presses against the frame causing pinching or squeezing
Solution Approach 1:
Instead of positioning the tilting axis above the pivot pin as in conventional designs, the patent inverts this arrangement by placing it below the pivot pin. This simple positional inversion fundamentally changes the force vector direction, preventing the sash overlap from pressing against the frame while maintaining mechanism simplicity
3Ease of operation
If conventional corner hinge designs are used with pivot axis on the support link, then wide opening angles up to 180° are achieved, but the sash overlap presses against the frame during tilting
Solution Approach 1:
The patent applies the inversion principle to the tilting axis positioning, placing it below the pivot pin rather than above or at the same level. This inversion allows the sash to achieve wide opening angles while the tilting motion occurs without the overlap contacting the frame, eliminating pinching
Solution Approach 2:
The patent segments the hinge mechanism into distinct functional components with independent axes: the pivot axis for opening/closing motion and the separately positioned tilting axis below it for tilting motion. This segmentation allows each axis to operate independently without interfering with the other, enabling wide opening angles while preventing pinching during tilting
Data Source
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AI summary
A concealed corner hinge (1) for a sash (300) of a window (100), French door (100), or the like, which is pivotable against a frame (200) and tiltable relative to it, comprising a support link (2), a control link (3), and a hardware unit (4). The hardware unit (4) comprises a base part (5) and a support part (6), the base part (5) having a pivot pin receptacle (7) for a pivot pin (9) arranged on the upper surface (8) of the support link (2), such that the base part (5) can pivot on the pivot pin (9) about a pivot axis (10). Furthermore, the hardware unit (4) has a tilting mechanism (11) with a tilting bolt (12), by means of which the support part (6) can be tilted relative to the base part (5) about a tilting axis (13). The tilting axis (13) of the tilting device (11) is arranged below the top (8) of the support arm (2).