Patent ID: 7971766

Claim:
A switch mechanism for a stapler which includes a barrel with a handle connected thereto, a valve connected to the handle and having an action rod, a safety rod slidably connected to the barrel of the stapler and having a distal end located close to the handle, the switch mechanism comprising: a trigger composed of two sidewalls and a closed bottom, a first pin and a second pin connected between the two sidewalls and located at a lower end of the trigger, two pivot holes defined through the two sidewalls and located close to a top end of the trigger, two notches defined in two respective outsides of the two sidewalls of the trigger; a pivotable member pivotably connected to the trigger and a first protrusion extending from a top of the pivotable member, wherein the pivotable member has a pivot hole defined in a lower end thereof and the first pin extends through the two sidewalls of the trigger and the pivot hole; a slide member having a recess defined in a side thereof and the recess communicating with an open bottom of the slide member, a portion of the pivotable member received in the recess and the slide member movable relative to the pivotable member, a second protrusion extending from a top inner end of the slide member, a spring connected between the first and second protrusions, and a swing member pivotably connected to the second pin and having a first curved part and a second curved part extending therefrom, the second curved part located at a side of the pivotable member, a torsion spring mounted to the second pin and having a first end contacting the swing member, a second end of the torsion spring contacting the closed bottom of the trigger.