Patent ID: 7665643

Claim:
A stapler comprising: a base ( 4 ) having two frames ( 41 ) extending from a top of a first end thereof and an anvil ( 46 ) located on the top of a second end of the base ( 4 ); a magazine ( 3 ) having a first end pivotably connected between first ends of the two frames ( 41 ) and an outlet ( 36 ) defined through an underside of the magazine ( 3 ); an arm ( 1 ) having a slot ( 11 ) defined therethrough and a first end of the arm ( 1 ) pivotably connected to the first ends of the two frames ( 41 ), and a link unit ( 2 ) located between the arm ( 1 ) and the magazine ( 3 ), the link unit ( 2 ) including a first link ( 21 ) and a second link ( 22 ), the first link ( 21 ) having a first end movably and pivotably connected with the slot ( 11 ) by a pin ( 12 ), a second end of the first link ( 21 ) movably and pivotably connected to pivotal holes ( 225 ) defined in a first end of the second link ( 22 ) by a pin ( 23 ), a hole ( 212 ) defined through the first link ( 21 ) and located between the first and second ends of the first link ( 21 ), a pin ( 213 ) extending the through hole ( 212 ) and removably rested on the top of the frames ( 41 ), a distance between the first end of the first link ( 21 ) and the hole ( 212 ) being longer than a distance between the second end of the first link ( 21 ) and the hole ( 212 ), a fulcrum hole ( 224 ) defined in a mediate portion of the second link ( 22 ) and a pin ( 441 ) extending through holes ( 44 ) defined through two respective second ends of the frames ( 41 ) and the fulcrum hole ( 224 ), the holes ( 44 ) located close to the second end of the base ( 4 ), a push plate ( 222 ) connected to the second end of the second link ( 22 ) and located corresponding to the outlet ( 36 ) of the magazine ( 3 ).