| 主权项 |
1. A powered surgical handpiece, said handpiece including:
a shell; a motor disposed in said shell, said motor including:
a winding assembly;a rotor disposed within said winding assembly and being rotatably mounted in said housing so as to rotate around a longitudinal axis, said rotor having a section that defines a bore that extends axially along the longitudinal axis of said rotor, the bore being defined by an inner surface of said rotor; anda plurality of magnets disposed in said rotor bore, wherein:
each said magnet has: an outer surface that is located adjacent the bore-defining inner surface of said rotor; and two inner surfaces that extend away from the outer face and towards the longitudinal axis of said motor rotor so as to define a corner between the inner faces that is located adjacent the longitudinal axis of said motor rotor and spaced inwardly from the magnet outer surface;said magnets are constructed so that the a first pole of a said magnet is located at the outer surface of the magnet and the opposed second pole is located at the corner of the magnet; andsaid magnets are disposed in the rotor bore so arcuately adjacent magnets have corners with opposed magnetic polarities; and a coupling assembly attached to said housing for releasably holding a cutting accessory to said shell and connecting the cutting accessory to said motor rotor so that said cutting accessory is actuated upon the rotation of said motor rotor. |
