Patent ID: 6765331
Filing Date: 2004-07-20
Classification: H02K,Y10T

Abstract:
An eccentric rotor having a high density member, comprising:a rotor base having an air-core armature coil installation surface, a bearing holder provided at a center thereof, and an air-core armature coil position determination guide formed of a high density member comprising metal and having a specific gravity of 6 or more and arranged to be eccentric outside of the bearing holder; an air-core armature coil arranged at the air-core armature coil position determination guide, said air-core armature coil having a coil portion and electrical leads electrically connected to and protruding from said coil portion of said air-core armature coil; and a printed wired commutator member installed to electrically insulate a conductive portion thereof from said rotor base, said printed wired commutator member comprising an end connection pattern, said end connection pattern being electrically connected to said electrical leads of said air-core armature coil, said end connection pattern of the printed wired commutator member being disposed inside an outer circumference of rotation of said rotor and being disposed at a position not overlapping said coil portion of the air-core armature coil.