Patent ID: 7327058

Claim:
A vibration motor, comprising: a stator assembly including a magnet and a substrate; a rotor assembly having an eccentric weight, a commutator, and a coil assembly electrically connected to the commutator; a shaft inserted through the rotor assembly and defining a rotational axis of the rotor assembly; and first and second brushes each having a fixed portion fixed to the substrate of the stator assembly and a contacting portion contacting the commutator to apply electric current to said commutator; wherein said commutator comprises a surface portion contactable directly physically with only one of said brushes; said surface portion comprises only a part of a track along which the contacting portion of said one of said brushes follows as said rotor assembly rotates, the commutator is contactable directly physically with the contacting portions of both said brushes along a remaining part of said track.