Tilt adjusting apparatus and optical disc drive using the same

1. A tilt adjusting apparatus of an optical disc drive, the tilt adjusting apparatus comprising:

a pickup base;

first and second guide shafts installed in the pickup base;

an optical pickup unit configured to tilt and move along the first and second guide shafts in a radial direction of a disc configured to receive light emitted from the optical pickup unit;

a fixing support unit that supports ends of the first guide shaft at a fixed height; and

an adjustment supporting unit supporting ends of the second guide shaft and being configured to adjust a height of the ends of the second guide shaft; and

wherein the optical pickup unit comprises at least one objective lens, and an actuator driving the at least one objective lens, and

the actuator comprises

a blade supporting the at least one objective lens, and

a first coil disposed at sides of the blade in the radial direction of the disc to allow the blade to perform focusing driving and radial tilt driving.

2. The tilt adjusting apparatus of claim 1 , wherein the height of the ends of the second guide shaft is adjustable while the fixed height of the ends of the first guide shaft is fixed by the fixing support, thereby enabling the optical pickup unit to tilt in a tangential direction perpendicular to the radial direction of the disc.

3. The tilt adjusting apparatus of claim 1 , wherein the fixing support unit comprises a first fixing unit receiving and fixing one end of the first guide shaft, and a second fixing unit engaging and fixing another end of the first guide shaft.

4. The tilt adjusting apparatus of claim 3 , wherein the second fixing unit comprises a supporting member installed in the pickup base and supporting a first portion of the first guide shaft at the second fixing unit, and a fixing member coupled to the supporting member and fixing a second portion of the first guide shaft to the supporting member at the second fixing unit.

5. The tilt adjusting apparatus of claim 4 , wherein the supporting member comprises a coupling groove to which the fixing member is coupled, and a contacting portion contacting the first guide shaft.

6. The tilt adjusting apparatus of claim 1 , wherein the adjustment supporting unit comprises a first adjusting unit supporting one end of the second guide shaft and being configured to adjust the height thereof, and a second adjusting unit supporting another end of the second guide shaft and being configured to adjust the height thereof.

7. The tilt adjusting apparatus of claim 6 , wherein the first and second adjusting units each comprise:

a supporting member installed in the pickup base;

an elastic member that has one end supported by the supporting member and which provides elasticity to the second guide shaft; and

an adjusting screw coupled to the supporting member and having a head contacting the second guide shaft.

8. The tilt adjusting apparatus of claim 7 , wherein the supporting member comprises a separation preventing groove configured to prevent separation of the elastic member from the supporting member, and a coupling groove to which the adjusting screw is coupled.

9. The tilt adjusting apparatus of claim 1 , further comprising a pickup transfer unit that is configured to transfer the optical pickup unit, wherein the first guide shaft is disposed toward the pickup transfer unit.

10. The tilt adjusting apparatus of claim 9 , wherein the pickup transfer unit comprises a lead screw that is disposed in parallel with the first guide shaft, and a transfer motor rotating the lead screw.

11. The tilt adjusting apparatus of claim 1 , wherein the actuator further comprises a second coil disposed at sides of the blade in a tangential direction perpendicular to the radial direction of the disc to allow the blade to perform tracking driving.

12. A tilt adjusting apparatus of an optical disc drive, the tilt adjusting apparatus comprising:

a pickup base;

first and second guide shafts installed in the pickup base;

an optical pickup unit configured to tilt and move along the first and second guide shafts in a radial direction of a disc configured to receive light emitted from the optical pickup unit;

a fixing support unit that supports ends of the first guide shaft at a fixed height; and

an adjustment supporting unit supporting ends of the second guide shaft and being configured to adjust a height of the ends of the second guide shaft;

wherein the optical pickup unit comprises at least one objective lens, and an actuator driving the at least one objective lens; and

the actuator comprises

a blade supporting the at least one objective lens;

suspension wires extending in a tangential direction perpendicular to the radial direction of the disc and supporting the blade to elastically move;

magnetic members that are facing each other and that have the blade provided therebetween;

a first coil disposed at sides of the blade in the radial direction of the disc to allow the blade to perform focusing driving and radial tilt driving; and

a second coil disposed at sides of the blade in the tangential direction to allow the blade to perform tracking driving.

13. The tilt adjusting apparatus of claim 12 , wherein the first coil is configured to cause the blade to perform focusing driving in response to a first signal, and the first coil is configured to cause the blade to perform radial tilting driving in response to a second signal opposite the first signal.

14. The tilt adjusting apparatus of claim 12 , wherein a tilting angle of the blade in the radial direction ranges from about 0.5 degree to about 1 degree.

15. An optical disc drive comprising:

a main frame;

a tray slidably installed in the main frame;

a pickup base installed in the tray;

a spindle motor installed in the pickup base and configured to rotate a disc;

first and second guide shafts installed in the pickup base;

an optical pickup unit configured to tilt and move along the first and second guide shafts in a radial direction of a disc configured to receive light emitted from the optical pickup unit;

a fixing support unit fixing ends of the first guide shaft at a fixed height; and

an adjustment supporting unit supporting ends of the second guide shaft and being configured to adjust a height of the ends of the second guide shaft;

wherein the optical pickup unit comprises at least one objective lens, and an actuator driving the at least one objective lens, and

the actuator comprises

a blade supporting the at least one objective lens, and

a first coil disposed at sides of the blade in the radial direction of the disc to allow the blade to perform focusing driving and radial tilt driving.

16. The optical disc drive of claim 15 , wherein the height of the ends of the second guide shaft is adjustable while the fixed height of the first guide shaft is fixed by the fixing support unit, thereby enabling the optical pickup unit to tilt in a tangential direction perpendicular to the radial direction of the disc.

17. The optical disc drive of claim 15 , wherein the actuator further comprises

a second coil disposed at sides of the blade in a tangential direction perpendicular to the radial direction of the disc to allow the blade to perform tracking driving.

18. The optical disc drive of claim 17 , wherein the actuator further comprises

suspension wires extending in the tangential direction and supporting the blade to elastically move; and

magnetic members that are facing each other and that have the blade provided therebetween.

19. The optical disc drive of claim 15 , wherein the actuator further comprises

suspension wires extending in a tangential direction perpendicular to the radial direction of the disc and supporting the blade to elastically move; and

magnetic members that are facing each other and that have the blade provided therebetween.