The structure can convert the rotation of a drive belt pulley into the plane curve movement of the pivot bolt, realize motor driving of the stapler and ensure the stapling strength and quality.

采用这样的结构后，可以实现将主动带轮的转动转变为枢轴螺栓的平面曲线运动，实现订扣机的电机驱动，保证订扣力度和订扣质量。