Detachable structure of seat frame and mechanical stretching device

The utility model discloses a detachable structure of a seat frame and a mechanical stretching device, which comprises a connecting pipe and a base plate, the connecting pipe is configured to be a pipe fitting positioned at the left part or the right part of the seat frame, and the base plate is configured to be a fixed part in a mechanism sheet at the left side or the right side in the mechanical stretching device and is kept static relative to the bottom surface; a transition piece is arranged between the connecting pipe and the base plate, is fixedly connected with the base plate and is connected with the connecting pipe above the transition piece through a mounting structure; the installation structure comprises an installation pin and an installation groove, the installation pin is arranged on the connecting pipe in a downward protruding mode or arranged on the transition piece in an upward protruding mode, correspondingly, the installation groove is formed in the other one of the connecting pipe and the