Patent ID: 7132770
Filing Date: 2006-11-07
Classification: H02K

Abstract:
1. An axial-air-gap brushless vibration motor having incorporated therein a drive circuit member comprising an eccentric rotor comprising a rotor yoke, an axial-air-gap magnet having a plurality of magnetic poles disposed at said rotor yoke, and an eccentric weight disposed at said rotor yoke in the radial direction outwardly of said magnet; a stator comprising a shaft supporting the eccentric rotor, a yoke bracket having disposed in the center thereof a shaft support portion for supporting the shaft, a stator base attached as an auxiliary element to the yoke bracket and having a feed terminal portion in the radial direction, at least two single-phase wiring-type air-core armature coils disposed in the stator base, and one Hall sensor and a drive circuit member for receiving the output of the Hall sensor which are disposed in said stator base so as to overlap none of the air-core armature coils, when seen from the plan view; and a cover for covering these; wherein on one part of said yoke bracket there are a magnetic portion for receiving the magnetic field of said axial-air-gap magnet and a nonmagnetic portion, and an opening for said cover is incorporated in an outer periphery portion.