Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takuro Iguchi0
Date of Patent
October 28, 2008
0Patent Application Number
113676480
Date Filed
March 3, 2006
0Patent Primary Examiner
Patent abstract
A spindle motor includes a rotor magnet including a plurality of pairs of magnetic poles polarized in a radial direction and arranged along a circumferential direction of the rotor magnet and a rotor hub supporting the rotor magnet and being rotatable around an axis of the circular shape of the rotor magnet. A circular surface in the form of a convex portion is provided on a magnetic shield portion of the rotor hub and is arranged to oppose one axial end surface of the rotor magnet and abut against the rotor magnet such that a gap is provided between the axial end surface of the rotor magnet and the circular surface of rotor hub.
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