Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tetsushi Yashima0
Naohisa Koyanagi0
Tadao Yamaguchi0
Date of Patent
August 8, 2006
0Patent Application Number
107056290
Date Filed
November 10, 2003
0Patent Primary Examiner
Patent abstract
A vibration motor has an eccentric rotor having a plurality of armature coils with at least one winding-type air core armature coil disposed in an eccentric manner on a printed wiring board. A commutator is disposed on the printed wiring board. An eccentric weight is disposed so as not to overlap with at least one winding-type air-core armature coil and at least two of the air-core armature coils overlap. A magnet imparts a magnet field to the eccentric rotor via an axial air gap, a brush that imparts electric power to the air-core armature coils via the commutator.
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