Electric stapler and operation method of electric stapler

An operation method of an electric stapler, the method comprising:

• a paper bundle pinching step of relatively moving a table part and a driver unit and also pinching a paper bundle by the table part and the driver unit;
• a staple separation step of folding a staple located at a forming position of staples in a staple sheet into U-shape by a forming plate provided in the driver unit and also separating the folded U-shape staple from the staple sheet by moving a driver provided in the driver unit;
• a penetration step of penetrating legs of the staple into the paper bundle by further moving the driver;
• a clinch step of inward folding the legs penetrating through the paper bundle by a clinch device;
• and
• a paper bundle releasing step of releasing the paper bundle by relatively moving the table part and the driver unit in a direction of moving away from each other,
• wherein a relative movement of the table part and the driver unit, the forming plate, the driver, and the clinch device are powered by a single motor, wherein a driving speed of the motor is controlled by a controller, and
• wherein the driving speed of the motor in the steps excluding the penetration step and the clinch step is slower than the driving speed of the motor in the penetration step and the clinch step.