Patent ID: 7222771

Claim:
An electric stapler comprising: a sheet table; a driver portion arranged on a lower side of the sheet table and including a driver; a clincher portion arranged on an upper side of the sheet table and including a clincher; a mechanism of moving up and down the clincher constituted by a mechanism of a feed screw driven by a motor, the feed screw mechanism comprising a male threaded member and a rotating female threaded member having external gear teeth; a grounding sensor for detecting grounding of the clincher; and a control portion for stopping to drive to move down the clincher in accordance with a grounding detecting signal of the grounding sensor; wherein the driver is opposed to the clincher by interposing the sheet table, the clincher portion is moved down to be grounded to paper on the sheet table, a staple is injected to an upper side via a hole of the sheet table by the driver and a leg portion of the staple penetrating the paper is clinched by the clincher.