Hidden hinge structure for aluminum alloy profile connection

The utility model discloses a hidden hinge structure for connecting aluminum alloy sections, which belongs to the technical field of hinge structures and comprises a pipe, a connecting groove is arranged on the front side of the pipe, a through hole is arranged in the middle of the inner top wall of the connecting groove, and the through hole is communicated with the connecting groove. The inner wall of the through hole is movably connected with a center shaft, the outer surface of the center shaft is movably connected with a connecting block, the bottom of the outer surface of the center shaft is in threaded connection with a fixing nut, and the outer surface of the connecting block is movably connected with a connecting piece. The connecting block is placed on the inner bottom wall of the connecting groove, the center shaft penetrates through the pipe and the through hole in the connecting block, then the fixing nut limits the center shaft to prevent the center shaft from falling off, the connecting piece i