摘要:
Staple gun for driving staples into a workpiece includes a frame with a driver conveyable upward and downward. In the downward movement, the driver executes a drive stroke driving the staple. In the upward movement, an activation member conveys the driver to a highest height and releases the driver to execute the drive stroke. An elongated elastic member has a first end coupled to the driver and a second end to a bearing pin assigned to the frame. A first breakpoint pin is placed between the bearing pin and the driver at a first distance from the bearing pin, and a second breakpoint pin between the driver and the first breakpoint pin is arranged at a second distance from the bearing pin and is movable between first and second positions disengaging and engaging the elastic member, respectively. The first distance is related to the highest height as 1.6-2.0:1.