Patent ID: 7656064

Claim:
A motor comprising: a rotor having a hub and a ring magnet being fixed to the hub; and a stator having a motor base and a suction ring in an annular shape made from a magnetic material being fixed to the motor base, wherein the rotor is sustained rotatable freely with respect to the stator through a bearing composed of a sleeve and a shaft being inserted into the sleeve; wherein the motor base is provided with a plurality of protruded sections that is formed on a wall section of the motor base rising in an axial direction from a bottom of the motor base in a radial direction and rising toward the hub side; wherein the plurality of protruded sections is formed in a circumferential direction at prescribed intervals, wherein an outer circumferential section or an inner circumferential section of the suction ring is press fitted into the plurality of protruded sections of the motor base and resulting in fixing the suction ring to the motor base; wherein a section contacting with the protruded section of the motor base and another section being separated from and confronting with the wall section of the motor base are alternately disposed on the outer circumferential section or the inner circumferential section of the suction ring in the circumferential direction, and further wherein one surface of the suction ring is disposed so as to coincide with a bottom surface of the ring magnet and covering a whole range of a projected area of the ring magnet that is projected on the surface of the suction ring.