초록

A head arm of a magnetic disk device has reduced air flow turbulence around the head arm using one or more of several configurations, such as multiple apertures, various chamfered edges, various protrusion configurations, and head arm shapes.

대표청구항 ▼

What is claimed is: 1. A head arm of a magnetic disk device with a magnetic head mounted on a bottom surface of a forward end thereof and secured to an actuator at a rear end thereof, comprising: an upper surface opposite the bottom surface extending between a leading edge of an upstream portion an

What is claimed is: 1. A head arm of a magnetic disk device with a magnetic head mounted on a bottom surface of a forward end thereof and secured to an actuator at a rear end thereof, comprising: an upper surface opposite the bottom surface extending between a leading edge of an upstream portion and a trailing edge of a downstream portion, the leading edge and the trailing edge being in a same plane; a plurality of apertures formed in said head arm; wherein the apertures are adjacent each other in a direction substantially transverse to a direction extending between the forward end and the rear end, so as to suppress air eddy currents generated at the head arm when at least one disk in the magnetic disk device rotates. 2. The head arm of claim 1, wherein vibration of the head arm is reduced by the suppression of the air eddy currents. 3. The head arm of claim 2, wherein a downstream portion of the head arm is formed with a plurality of irregularities at regular or irregular intervals. 4. The head arm of claim 1, wherein a downstream portion of the head arm is formed with a plurality of irregularities at regular or irregular intervals. 5. The head arm of claim 1, wherein turbulence energy is reduced by about 10% compared with the turbulence energy generated with only conventional apertures. 6. The head arm of claim 1, comprising at least three or more apertures. 7. The head arm of claim 1, wherein the head arm is made of metal, and the apertures are formed by punching. 8. The head arm of claim 1, wherein the head arm is made of metal, a single aperture is punched in the metal, and the aperture is divided by bonding plastic bridging material across the aperture to create the plurality of apertures. 9. The head arm of claim 1, wherein the apertures are dimensioned such that the air eddy currents are not substantially generated in the apertures and the airflow is not substantially disturbed by the apertures. 10. The head arm of claim 1, comprising a plurality of protrusions formed at regular intervals on a downstream side of the head arm. 11. The head arm of claim 10, comprising six of the protrusions. 12. The head arm of claim 1, wherein the protrusions are formed by punching. 13. The head arm of claim 1, wherein the protrusions are formed separately from the head arm and are attached to the head arm. 14. The head arm of claim 1, wherein the forward end of the head arm is formed in the shape of a wedge. 15. The head arm of claim 1, wherein the apertures are aligned substantially parallel to each other in a direction extending between the forward end and the rear end. 16. A head arm of a magnetic disk device with a magnetic head mounted on a bottom surface of a forward end thereof and secured to an actuator at a rear end thereof, comprising: an upstream portion relative to an airflow generated by at least one disk in the disk device, said upstream portion extending from the rear end to the forward end; a downstream portion opposite said upstream portion; an upper surface opposite the bottom surface extending between a leading edge of said upstream portion and a trailing edge of said downstream portion, the leading edge and the trailing edge being in a same plane; at least one irregularity formed proximate said downstream portion of the head arm for suppressing air eddy currents generated at said head arm when the at least one disk in the magnetic disk device rotates. 17. The head arm of claim 16, wherein the irregularity includes a plurality of protrusions spaced at regular intervals along the downstream portion of the head arm. 18. The head arm of claim 17, wherein the head arm is made of metal and the protrusions are formed by punching. 19. The head arm of claim 17, wherein the protrusions are made separately from the head arm and are attached to the head arm. 20. The head arm of claim 16, comprising at least one weight reducing aperture. 21. The head arm of claim 20, wherein the forward end portion of the head arm is formed in the shape of a wedge. 22. A head arm of a magnetic disk device having at least one disk, comprising; a rear end portion configured to be secured to a rotary shaft of an actuator; a forward end portion opposite said rear end portion configured to have a magnetic head mounted thereon; an upstream side relative to an airflow generated by the disk when the disk is rotated; and a downstream side opposite said upstream side; wherein said downstream side and said upstream side connect to form a point defining an angle between said downstream side and said upstream side at said forward end portion. 23. A head arm of a magnetic disk device with a magnetic head mounted at the forward end thereof and driven by an actuator at the other end thereof, the magnetic disk device having at least one disk, said head arm comprising: leading edge relative to an airflow generated by the disk when the disk is rotated; trailing edge opposite said upstream side; an upper surface and a lower surface extending between said upstream edge and said downstream edge the leading edge and the trailing edge being in a same plane; and at least one protrusion extending from the upper or lower surface of the head arm for suppressing air eddy currents generated at said head arm when the at least one disk in the magnetic disk device rotates. 24. The head arm of claim 23, comprising a plurality of protrusions on the upper and lower surfaces of the head arm. 25. The head arm of claim 24, wherein said forward end portion of said head arm is formed in the shape of a wedge.