Patent ID: 7690545

Claim:
A hand-operated stapler comprising a lower base disposed with a receiving opening; an upper base which slants down into the receiving opening at a stapling position; an upper clincher member disposed at a front end of the upper base; a lower clincher member fixedly disposed inside the receiving opening which achieves clinching effect when engaging with the upper clincher member; a hanger welded to the upper base and disposed with a pin; a magazine with its rear end pivotable around the pin of the hanger; a metal head which covers the magazine and having its rear end pivotable around the pin of the hanger; a pressing cap which covers the metal head; an arm disposed in between the pressing cap and the metal head with a length shorter than that of the metal head, wherein the arm comprises a front end which is securely connected to an anterior portion inside the pressing cap and acts as an effort; a rear end which is pivotable around an axis at a position between the metal head and the magazine and acts as a fulcrum; and a load portion in between the front end and the rear end of the arm which is securely connected to the pressing cap and drives the metal head to move downward at the stapling position; a sliding belt with its rear end connected to a rear end of the pressing cap; a stopper disposed inside the receiving opening; and a blocking member disposed inside the receiving opening of the lower base, wherein a rear end of the blocking member is connected to a front end of the sliding belt, and at a non-stapling default position a front end of the blocking member is biased to be disposed above the stopper and thereby blocks the upper clincher member from engaging with the lower clincher member; and at a stapling position the rear end of the sliding belt is pulled upward by upward movement of the rear end of the pressing cap, thereby pulling the blocking member rearward and away from the stopper and thus allowing the upper base to slant down into the receiving opening and the upper clincher member to engage with the lower clincher member.