Patent ID: 7841424
Filing Date: 2010-11-30
Classification: B25B,Y10T

Abstract:
1. A power output mechanism for power tools, comprising a main part driving an output shaft, a pressing unit, and an operation member; a switch unit having a tubular portion and a rotation collar mounted to the tubular portion, the tubular portion including a plurality of slots and the rotation collar including a plurality of axial protrusions; an impact unit having an orientation wheel which is movably connected to the output shaft and an operation wheel which is secured to the output shaft, the orientation wheel including a first toothed contact surface and the operation wheel including a second toothed contact surface which is removably engaged with the first toothed contact surface, a ring portion defined on an outer periphery of the orientation wheel; and a plurality of positioning springs located in the slots of the tubular portion and inserted into the rotation collar, the ring portion of the orientation wheel having a corrugated surface defining peaks and valleys,