Concealed hinge capable of being sequentially opened and closed at large angle

Abstract

The invention discloses a door and window concealed hinge capable of being sequentially opened and closed at a large angle. The door and window concealed hinge comprises a hinge arm (5), a frame hinge pair arranged at a frame hinge end of the hinge arm (5) and a sash hinge pair arranged at a sash hinge end of the hinge arm (5); and frame clamping pairs (9) capable of mutually keeping the positioning between a frame hinge shaft (3) and the frame hinge end and sash clamping pairs (10) capable of mutually keeping the positioning between a sash hinge shaft (4) and the sash hinge end are arranged in the hinge pairs correspondingly. In the process of opening a door and window sash, the frame hinge pair at the frame hinge end is firstly rotated, the sash hinge pair at the sash hinge end does not rotate, and then the sash hinge pair is rotated, and the frame hinge pair does not rotate; the phenomenon that the two hinge pairs rotate at the same time in the middle is avoided, and therefore the snakelike swing phenomenon with the unpredictable swing range between sash frames is avoided; and otherwise, the process of closing the door and window sash is opposite to the process of opening the door and window sash.

Description

technical field [0001] The invention relates to the technical field of hinges, in particular to a large-angle concealed hinge capable of sequential opening and closing, which is suitable for a security door with concealed hinges. Background technique [0002] Anti-theft doors are essential home security products in people's daily life. For the doors facing the aisle or the terrace, in order to avoid blocking the aisle or the terrace after the door and window are opened, it 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 shaft of single-piece hinge to be able to rotate, is subjected to the limit of ...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem of the serpentine swing phenomenon that the hidden hinge that can be opened 180 degrees in the prior art needs to set complex running tracks for some axes to limit the swing range.

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