Spindle motor
A spindle motor is provided. The spindle motor includes a rotation shaft rotatably installed, a stator around the rotation shaft, a rotor coupled to the rotation shaft, a turntable rotated with the rotation shaft, and a center guide member comprising a body coupled to the rotation shaft and a support rim extending from the body, the support rim can comprise a first sloped surface extending from an outer surface of the body and making an angle of about 47° to 53° with an imaginary vertical line parallel with the rotation shaft, and a second sloped surface extending from an end of the first sloped surface and making an angle of about 16° to 22° with an imaginary vertical line parallel with the rotation shaft.
1. A spindle motor comprising:
a rotation shaft rotatably installed;
a stator around the rotation shaft;
a rotor coupled to the rotation shaft;
a turntable rotated with the rotation shaft; and
a center guide member comprising a body coupled to the rotation shaft and a support rim extending from the body,
wherein the support rim comprises:
a first sloped surface extending from an outer surface of the body and making an angle of about 47° to 53° with an imaginary vertical line parallel with the rotation shaft; and
a second sloped surface extending from an end of the first sloped surface and making an angle of about 16° to 22° with an imaginary vertical line parallel with the rotation shaft.
2. The spindle motor according to claim 1 , further comprising an elastic member disposed between the turntable and the center guide member for supporting the center guide member axially and radially.
3. The spindle motor according to claim 1 , further comprising a bush coupled to the rotation shaft for inhibiting the center guide member from departing from the rotation shaft.
4. The spindle motor according to claim 3 , wherein the bush is disposed inside the center guide member.
5. The spindle motor according to claim 3 , wherein the center guide member surrounds a side surface of the bush.
6. The spindle motor according to claim 3 , further comprising a clamp magnet disposed at the bush.
7. The spindle motor according to claim 6 , wherein the center guide member surrounds a side surface of the clamp magnet.
8. The spindle motor according to claim 1 , wherein the center guide member is movable on the rotation shaft upward and downward for supporting a disk.
9. The spindle motor according to claim 1 , wherein the body and the support rim of the center guide member are formed in one piece.
10. The spindle motor according to claim 1 , wherein the center guide member is formed of a synthetic resin.
11. The spindle motor according to claim 1 , wherein the support rim protrudes outward from an outer surface of the body in a radial direction and extends downward.
12. A spindle motor comprising:
a rotation shaft rotatably installed;
a stator around the rotation shaft;
a rotor coupled to the rotation shaft;
a turntable rotated with the rotation shaft; and
a center guide member comprising a body coupled to the rotation shaft and a support rim extending from the body,
wherein the support rim comprises:
a first sloped surface extending from an outer surface of the body and making an angle of about 53° to 59° with an imaginary vertical line parallel with the rotation shaft;
a second sloped surface extending from an end of the first sloped surface and making an angle of about 8° to 14° with an imaginary vertical line parallel with the rotation shaft; and
a third sloped surface extending from an end of the second sloped surface and making an angle of about 16° to 22° with an imaginary vertical line parallel with the rotation shaft.
13. The spindle motor according to claim 12 , further comprising:
an elastic member disposed between the turntable and the center guide member for supporting the center guide member axially and radially; and
a bush coupled to the rotation shaft for inhibiting the center guide member from departing from the rotation shaft.
14. The spindle motor according to claim 13 , wherein the bush is disposed inside the center guide member.
15. The spindle motor according to claim 13 , wherein the center guide member surrounds a side surface of the bush.
16. The spindle motor according to claim 13 , further comprising a clamp magnet disposed at the bush.
17. The spindle motor according to claim 16 , wherein the center guide member surrounds a side surface of the clamp magnet.
18. The spindle motor according to claim 12 , wherein the center guide member is movable on the rotation shaft upward and downward for supporting a disk.
19. The spindle motor according to claim 12 , wherein the body and the support rim of the center guide member are formed in one piece.
20. The spindle motor according to claim 12 , wherein the center guide member is formed of a synthetic resin.