US Patent 11981008 Staple

A stapler includes a handle unit connected to a driver unit by a transmission shaft portion provided between a fulcrum shaft portion and a driver, and configured to move the driver unit; a camshaft provided to a clincher unit; a cam groove portion provided to the handle unit, configured to permit the camshaft to enter, and having one open end portion to enable to the camshaft to be inserted/pulled out; a guide convex portion provided to the clincher unit, and a guide concave portion provided to the handle unit and configured to restrict a movement path of the handle unit with respect to the clincher unit.