Electric-motor rotary power tool having a light source with a self-generating power supply

摘要

A rotary power tool (10) having a light source includes a housing (12), an electric motor (24) provided in the housing (12) and an elongated spindle (26) engaged with and adapted to be rotatably driven by the motor. A rotatable holding assembly is attached to an end of the spindle (26) and extends from a front end of the housing (12) for holding a tool accessory. At least one magnet (44) is adapted to be rotated by the spindle (26) for producing a magnetic field, and a generally tubular sleeve is attached to the front end of the housing (12). At least one light emitting diode (20) projects from a front end of the sleeve, generally between the inner and the outer surfaces of the sleeve. An inductive coil is also imbedded at least partially in the sleeve generally between the inner and the outer surfaces, proximate the magnet (44) for generating an electric current from the magnetic field. Electrical conductors are also embedded and routed through the sleeve for supplying the electric current from the inductive coil to the light emitting diode (20).