Patent ID: 7389902

Claim:
A stapler that requires exertion of less effort comprising a body, an electric motor, a power supply, a power supply switch, a motion transmission mechanism having a gear cluster driven by the electric motor, a staple driving mechanism having a driving blade and a staple magazine driven by the motion transmission mechanism, which is characterized in that the motion transmission mechanism comprises a rocking arm, and the rocking arm is a crank which is composed of a connecting shaft and a rocking shaft, the end of the connecting shaft connects to the top of the driving blade, the end of the rocking shaft is a gear, and the gear of the rocking arm has teeth which mesh with teeth of at least one gear of the gear cluster; the motion transmission mechanism further comprises a double pole changeover switch and a micro switch; when the gear of the rocking arm swings to a first position which is the nearest to the front end of the staple magazine, the gear of the rocking arm contacts the micro switch; when the double pole changeover switch is actuated, an electric circuit is connected; the power supply provides electricity to the electric motor, and the electric motor rotates and drives the gear cluster to rotate and the gear of the rocking arm to swing upward to a second position; when the double pole changeover switch is deactivated, it changes the electric circuit to drive the electric motor to rotate reversely, the electric motor drives the gear cluster to rotate reversely and the gear of the rocking arm to swing downward until the gear of the rocking arm contacts the micro switch, the micro switch then disconnects the electric circuit, and the electric motor ceases to rotate.