Disk limiter for disk drive
View Patent ↗A disk drive including a disk having a top surface, a cover positioned over the disk, and a disk limiter protruding from the cover toward the disk. The disk limiter is configured to contact a portion of the top surface of the disk when the disk is deflected toward the cover, and has a middle portion between two end portions. At least one portion of the disk limiter curves or slopes in a direction away from the disk.
1. A disk drive comprising:
a disk having a top surface;
a cover positioned over the disk; and
a disk limiter protruding from the cover toward the disk and configured to contact a portion of the top surface of the disk when the disk is deflected toward the cover,
wherein the disk limiter has a middle portion between two end portions, each end portion having a chamfer sloping from the middle portion in a direction away from the disk toward an end of the end portion such that the chamfer includes a contact area substantially along a length of the chamfer for contact with the top surface of the disk.
2. The disk drive of claim 1 , wherein a bottom surface of each chamfer forms a chamfer angle with a plane substantially parallel to a bottom surface of the middle portion, and wherein the chamfer angle is within a range of one to thirty degrees.
3. The disk drive of claim 2 , wherein the chamfer angle is approximately five degrees.
4. The disk drive of claim 1 , further comprising a ramp which surrounds a portion of the disk, wherein the disk limiter is located approximately across a center portion of the disk from the ramp.
5. The disk drive of claim 1 , wherein the disk limiter is formed in the cover of the disk drive.
6. The disk drive of claim 1 , wherein the disk limiter is formed of elastomeric material bonded to the cover of the disk drive.
7. The disk drive of claim 1 , wherein the end portions each have a rounded end on a side opposite the middle portion.
8. The disk drive of claim 1 , wherein longitudinal edges on a bottom surface of the disk limiter are rounded.
9. The disk drive of claim 1 , wherein the disk limiter is radially positioned and contoured about a center of the disk so as to contact an outer diameter portion of the top surface of the disk.
10. A disk drive comprising:
a disk having a top surface;
a cover positioned over the disk; and
a disk limiter protruding from the cover toward the disk and configured to contact a portion of the top surface of the disk when the disk is deflected toward the cover,
wherein the disk limiter has a middle portion between two end portions, each end portion having a curved bottom surface which curves from a bottom surface of the middle portion in a direction away from the disk toward an end of the end portion such that the curved bottom surface includes a contact area substantially along a length of the curved bottom surface for contact with the top surface of the disk.
11. The disk drive of claim 10 , wherein a radius of the curved bottom surface of an end portion is greater than a total length of the disk limiter.
12. The disk drive of claim 10 , wherein a radius of the curved bottom surface of an end portion is greater than or equal to one millimeter.
13. The disk drive of claim 10 , wherein a radius of the curved bottom surface of an end portion is approximately 130 millimeters.
14. The disk drive of claim 10 , further comprising a ramp which surrounds a portion of the disk, wherein the disk limiter is located approximately across a center portion of the disk from the ramp.
15. The disk drive of claim 10 , wherein the disk limiter is formed in the cover of the disk drive.
16. The disk drive of claim 10 , wherein the disk limiter is formed of elastomeric material bonded to the cover of the disk drive.
17. The disk drive of claim 10 , wherein the end portions each have a rounded end on a side opposite the middle portion.
18. The disk drive of claim 10 , wherein longitudinal edges of the curved bottom surfaces of the end portions are rounded.
19. The disk drive of claim 10 , wherein the disk limiter is radially positioned and contoured about a center of the disk so as to contact an outer diameter portion of the top surface of the disk.
20. A disk drive comprising:
a disk having a top surface;
a cover positioned over the disk; and
a disk limiter protruding from the cover toward the disk and configured to contact a portion of the top surface of the disk when the disk is deflected toward the cover,
wherein the disk limiter has a middle portion between two end portions, the middle portion having a curved bottom surface which curves in a direction away from the disk toward the end portions such that the curved bottom surface includes a contact area substantially along a length of the curved bottom surface for contact with the top surface of the disk.
21. The disk drive of claim 20 , further comprising a ramp which surrounds a portion of the disk, wherein the disk limiter is located approximately across a center portion of the disk from the ramp.
22. The disk drive of claim 20 , wherein the disk limiter is formed in the cover of the disk drive.
23. The disk drive of claim 20 , wherein the disk limiter is radially positioned and contoured about a center of the disk so as to contact an outer diameter portion of the top surface of the disk.