Large-opening blind hinge

Abstract

The invention discloses a large-opening blind hinge which is suitable for hinging a door leaf and a door frame; the large-opening blind hinge comprises a blind hinge frame piece, a blind hinge leaf piece and a blind hinge bolt; under the arrangement of an L-shaped bending section, a mounting section and the blind hinge leaf piece, a maximum opening and closing angle far larger than 90 degrees can be achieved, the defective rate is reduced, secondary assembly is avoided, meanwhile, the application range is greatly widened, the requirements of different users can be met, assembling parts such as a door frame hinge connecting plate, a hinge gasket, a door leaf hinge connecting plate, a door frame hinge box, a bearing, a blind hinge door frame hinge box upper cover and a plurality of bolts for connecting the blind hinge frame piece and the blind hinge leaf piece are reduced, so that the production cost is reduced, the assembling efficiency is improved, the outer surface of the door frame is a whole plane, the door frame is more attractive, the situation that abnormal sound occurs in the long-term use process of a door product is avoided, and the user experience is better.

Description

technical field [0001] The invention relates to a concealed hinge, in particular to a concealed hinge with a large opening. Background technique [0002] refer to figure 1 , the existing concealed hinge is composed of concealed hinge frame piece 6, concealed hinge leaf 7 and concealed hinge pin 5, in order to realize the installation of concealed hinge, concealed hinge doorframe hinge box 3 needs to be set inside doorframe 2, and open on doorframe 2 The concealed hinge leaf 7 protrudes from the hole, and the concealed hinge frame 6 is fixedly mounted on the concealed hinge pin 5. The concealed hinge pin 5 is rotationally connected with the door frame hinge box 3 through a bearing. The hinge frame piece 6 is fixedly connected, and the hidden hinge fan piece 7 and the hidden hinge frame piece 6 are U-shaped after assembly; [0003] refer to figure 2 , due to the setting of the concealed hinge leaf 7 protruding from the hole provided on the door frame 2, the maximum opening...

AI Technical Summary

Problems solved by technology

[0005] In general, the existing steel door production requires the opening and closing angle of the door leaf 1 to be greater than or equal to 90°. Due to the inevitable processing or assembly errors in the production and processing, after the actual production of the concealed hinge is assembled, the door leaf often appears 1 It can only be opened to 88° or 89° and cannot meet the design requirements;

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