Magnetic disk device

1. A magnetic disk device comprising:

a magnetic disk for recording information;

a spindle motor for driving the magnetic disk for rotation;

a magnetic head for reading information from the magnetic disk;

a carriage arm for supporting the magnetic disk;

a voice coil motor for moving the carriage arm;

a loading/unloading mechanism for retracting the carriage arm from a position on the magnetic disk;

a shroud for forming a peripheral wall;

a screen positioned between the loading/unloading mechanism and the shroud; and

an air passage positioned between the screen and the shroud.

2. The magnetic disk device according to claim 1 , wherein the screen produces a smooth air current around the loading/unloading mechanism.

3. The magnetic disk device according to claim 1 , further comprising a return channel positioned between the voice coil motor and the shroud.

4. The magnetic disk device according to claim 3 , further comprising a filter disposed in the return channel.

5. A magnetic disk device comprising:

a magnetic disk for recording information;

a spindle motor for driving the magnetic disk for rotation;

a magnetic head for reading information from the magnetic disk;

a carriage arm for supporting the magnetic head;

a voice coil motor for moving the carriage arm;

a shroud for forming a peripheral wall;

a loading/unloading mechanism spaced from the shroud for retracting the carriage arm from a position on the magnetic disk; and

a screen positioned between the loading/unloading mechanism and the shroud;

wherein the entire structure of the screen is spaced from the shroud.

6. The magnetic disk device according to claim 5 , wherein the screen produces a smooth air current around the loading/unloading mechanism.

7. The magnetic disk device according to claim 5 , further comprising a return channel positioned between the voice coil motor and the shroud.

8. The magnetic disk device according to claim 7 , further comprising a filter disposed in the return channel.

9. The magnetic disk device according to claim 5 , wherein the screen is spaced from the shroud so as to delimit an air passage therebetween which enables air flow therethrough.

10. A magnetic disk device comprising:

a magnetic disk for recording information;

a spindle motor for driving the magnetic disk for rotation;

a magnetic head for reading information from the magnetic disk and/or writing information to the magnetic disk;

a carriage arm for supporting the magnetic head;

a voice coil motor for moving the carriage arm;

a shroud for forming a peripheral wall;

a screen which is spaced from the shroud;

an air passage formed between the screen and the shroud which enables air flow therethrough; and

a loading/unloading mechanism for retracting the carriage arm from a position on the magnetic disk;

wherein the air passage extends from an upper side of the loading/unloading mechanism to a lower side of the loading/unloading mechanism with respect to the rotating direction of the magnetic disk.

11. The magnetic disk device according to claim 10 , wherein the loading/unloading mechanism is spaced from the shroud.

12. The magnetic disk device according to claim 10 , further comprising a filter disposed within the magnetic disk drive.

13. The magnetic disk device according to claim 12 , further comprising a return channel positioned between the voice coil motor and the shroud, the filter being disposed in the return channel.

14. The magnetic disk device according to claim 10 , wherein the screen is positioned between the loading/unloading mechanism and the shroud.