Large-angle opening and closing blind hinge

Abstract

The invention discloses a large-angle opening and closing blind hinge which comprises a hinge arm, two ends of the hinge arm are a frame hinge end and a sash hinge end respectively, and the frame hinge end is hinged to a frame hinge piece and has a shape suitable for being retracted into and extended out of a space in a frame. The sash hinge end is hinged with the sash hinge piece and has a shape suitable for being retracted into and extended out of the sash inner space; a frame clamping pair capable of keeping positioning mutually and a frame end limiting mechanism for limiting the frame hinging piece and the frame hinging end to relatively rotate at a preset angle are arranged between the frame hinging piece and the frame hinging end; a sash clamping pair capable of keeping positioning mutually and a sash end limiting mechanism for limiting the relative rotation angle of the sash hinge piece and the sash hinge end are arranged between the sash hinge piece and the sash hinge end. Due to the fact that the limiting mechanism is limited between the hinging piece and the hinging end, the door and window blind hinge capable of being opened and closed at the large angle does not need to be additionally provided with an additional structure to serve as a fixed blocking point, and manufacturing and assembling are more convenient.

Description

technical field [0001] The invention relates to the field of doors and windows, in particular to a large-angle opening and closing concealed hinge which is suitable for anti-theft doors and windows with concealed hinges and can be opened and closed sequentially. Background technique [0002] Anti-theft doors and windows are indispensable home security products in people's daily life. For doors and windows facing the aisle or the terrace, in order to avoid blocking the aisle or the terrace after the doors and windows are opened, the door and window should be designed so that the door and window can be Hinges that open up to 180 degrees to connect door and window sashes to door and window frames. However, for safety doors such as anti-theft doors, hidden hinges that cannot be accessed from the outside of the door must be used due to safety requirements. And ordinary concealed hinge is because the hinge shaft is arranged in the door and window frame, only has the hinge pin sha...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem of complex structure of hidden hinges that can be opened and closed sequentially in the prior art

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