Lifting motion mechanism of bookbinding machine

The utility model belongs to the field of bookbinding devices, and relates to a lifting motion mechanism of a bookbinding machine, solving the problem that a gear and rack lifting mechanism of an existing bookbinding machine can not reset when exceeding the maximum displacement. The lifting motion mechanism comprises a rack, wherein a vertical guide column and a lifting plate capable of being lifted along the guide column are arranged on the rack, and an executing structure is arranged on the lifting plate. The lifting motion mechanism is characterized in that a motor is horizontally arranged on the top of the rack, a rotating member rotating with a shaft is arranged on the motor output shaft, a connecting rod is arranged between the rotating member and the lifting plate, the bottom end of the connecting rod is hinged with the lifting plate, the top end of the connecting rod is hinged with the rotating member, and a hinge point of the connecting rod and the rotating member and the motor output shaft are aslan