Patent ID: 7979874

Claim:
A spindle motor comprising: a base; a bearing housing supported on the base; a bearing provided within the bearing housing; a rotating shaft rotatably supported by the bearing; a stator including a core fixed to the bearing housing and coils wound around the core; a rotor including a rotor yoke fixed to the rotating shaft, and a first magnet installed on the rotor yoke facing the stator, wherein the rotor yoke includes a first portion coupled to the rotating shaft, a second portion connected to an upper portion of the first portion and extended outward in a radial direction, a third portion connected to the second portion and extended downward in a vertical direction, and a fourth portion connected to the third portion and extended outward in the radial direction, and wherein the first magnet is disposed on an inner side surface of the third portion; a turntable positioned on the rotor yoke, rotating together with the rotating shaft, wherein the turntable includes an inner circumferential surface, an outer circumferential surface, and a disk supporting portion disposed at an upper portion of the outer circumferential surface and protruded outward in the radial direction; a center guide member supported by the rotating shaft at an upper side of the turntable; and an elastic member disposed between the turntable and the center guide member for elastically supporting the center guide member, wherein the outer circumferential surface of the turntable is arranged radially at substantially a same position as the fourth portion, wherein the center guide member comprises: a ring-shaped coupling plate into which the rotating shaft is inserted, to be capable of rising and descending; a dividing wall formed to extend upward from an outer circumference of the coupling plate; and a supporting band formed to extend downward from the dividing wall and tapered to progressively extend farther from a center of the rotating shaft in a downward direction, wherein a first portion of the ring-shaped coupling plate adjacent to the rotating shaft is thicker than a second portion of the ring-shaped coupling plate adjacent to the dividing wall.