Granted Patent B2

US 12,354,631 · App. 18/360,582 · Granted Jul 8, 2025

Inventor: Katsuhiko Ohta (Tokyo, JP)

Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.

G11B5/54G11B5/4806G11B21/12G11B21/22

Abstract

Claims (79)

1. A magnetic storage device, comprising:

a number of disks rotatable about a first axis; and

a ramp support configured to receive a number of read-write head assemblies that are rotated radially outward from the number of disks, the ramp support comprising:

a first ramp comprising:

a first-ramp receiving end; and

a first-ramp surface, comprising:

a first first-ramp portion; and

a second first-ramp portion; and

a second ramp comprising an end, offset laterally from the first-ramp receiving end in a direction along a virtual plane that is interposed between the first ramp and the second ramp and extends radially outward from the first axis,

wherein in the direction along the virtual plane, the first first-ramp portion faces and is angled toward the virtual plane, and the second first-ramp portion faces and is angled away from the virtual plane.

2. The magnetic storage device of claim 1 , wherein:

each read-write head assembly of the number of read-write head assemblies comprises a read-write head assembly of a carriage arm of a number of carriage arms;

each carriage arm of the number of carriage arms comprises:

a first read-write head assembly, comprising:

a suspension tab of the first read-write head assembly; and

a first slider; and

a second read-write head assembly, comprising:

a suspension tab of the second read-write head assembly; and

a second slider;

the magnetic storage device is configured to move each slider and suspension tab in a direction parallel to the virtual plane; and

the first ramp and the second ramp are positioned such that the suspension tab of the first read-write head assembly contacts the first first-ramp portion at a first time and the suspension tab of the second read-write head assembly contacts the second ramp at a second time that is different than the first time.

3. The magnetic storage device of claim 1 , wherein the end of the second ramp is offset from the first-ramp receiving end by a distance of no less than 0.1 millimeters (“mm”) and no greater than 0.3 mm.

4. The magnetic storage device of claim 1 , wherein the second ramp further comprises:

a first second-ramp surface; and

a second second-ramp surface opposite the first second-ramp surface, wherein the second second-ramp surface faces a disk of the number of disks, the disk received by a portion of the ramp support.

5. The magnetic storage device of claim 1 , wherein:

the first-ramp surface comprises a first first-ramp surface;

the first ramp further comprises a second first-ramp surface opposite the first first-ramp surface;

the second first-ramp surface faces a disk of the number of disks; and

the disk of the number of disks is received by a portion of the ramp support.

6. The magnetic storage device of claim 1 , wherein:

the ramp support further comprises a plurality of first ramps and a plurality of second ramps separated into a plurality of sets each comprising a corresponding one of the plurality of first ramps and a corresponding one of the plurality of second ramps; and

at least one set of the plurality of sets comprises a first second ramp and a first first ramp positioned above the first second ramp in a direction that is substantially parallel to the first axis and at least one other set of the plurality of sets comprising a second second ramp and a second first ramp positioned below the second second ramp in a direction that is substantially parallel to the first axis.

7. The magnetic storage device of claim 1 , wherein the first-ramp surface receives a convex portion of a first suspension tab of a first read-write head assembly of the number of read-write head assemblies, and the second ramp receives a convex portion of a second suspension tab of a second read-write head assembly of the number of read- write head assemblies.

8. The magnetic storage device of claim 1 , wherein the first first-ramp portion and the second first-ramp portion are contiguous.

9. The magnetic storage device of claim 1 , wherein the first first-ramp portion has a length greater than a length of the second first-ramp portion.

10. The magnetic storage device of claim 1 , wherein the second ramp further comprises:

a first second-ramp portion; and

a second second-ramp portion having a length less than a length of the first second-ramp portion.

11. The magnetic storage device of claim 10 , wherein the first first-ramp portion has a length greater than the length of the first second-ramp portion.

12. The magnetic storage device of claim 1 , wherein:

the first first-ramp portion initiates at the first-ramp receiving end of the first ramp and extends away from the first-ramp receiving end;

the second ramp comprises a first second-ramp portion that initiates at the end of the second ramp and extends away from the end of the second ramp; and

the second ramp further comprises a second second-ramp portion.

13. The magnetic storage device of claim 12 , wherein:

the second first-ramp portion is substantially parallel to the first second-ramp portion;

the first ramp further comprises a third first-ramp portion; and

the second second-ramp portion is substantially parallel to the third first-ramp portion.

14. The magnetic storage device of claim 13 , further comprising:

a third second-ramp portion;

a fourth first-ramp portion;

a first gap between the second first-ramp portion and the first second-ramp portion;

a second gap between the third first-ramp portion and the second second-ramp portion;

and a third gap between the third second-ramp portion and the fourth first-ramp portion, wherein each of the first gap, the second gap, and the third gap is substantially constant in a direction along the virtual plane.

15. The magnetic storage device of claim 13 , wherein:

an angle of the first first-ramp portion relative to the virtual plane is substantially equivalent to an angle of the first second-ramp portion relative to the virtual plane;

an angle of the second first-ramp portion relative to the virtual plane is substantially equivalent to an angle of the first second-ramp portion relative to the virtual plane; and

an angle of the third first-ramp portion relative to the virtual plane is substantially equivalent to an angle of the second second-ramp portion relative to the virtual plane.

16. The magnetic storage device of claim 1 , wherein the second first-ramp portion is offset laterally from the first first-ramp portion in a direction along the virtual plane.

17. The magnetic storage device of claim 1 , wherein the first- ramp surface is configured to receive a convex portion of a suspension tab of a read-write head assembly of the number of read-write head assemblies, and the second ramp further comprises a second-ramp surface configured to receive a convex portion of a second suspension tab of a second read-write head assembly of the number of read-write head assemblies.

18. A magnetic storage device, comprising:

a means for magnetically storing data that is rotatable about a first axis; and

a ramp support configured to receive a number of read-write head assemblies that are rotated radially outward from the means for magnetically storing data, the ramp support comprising:

a first ramp comprising:

a first-ramp receiving end; and

a first-ramp surface, comprising:

a first first-ramp portion; and

a second first-ramp portion; and

a second ramp comprising an end, offset laterally from the first-ramp receiving end in a direction along a virtual plane that is interposed between the first ramp and the second ramp and extends radially outward from the first axis,

wherein in the direction along the virtual plane, the first first-ramp portion faces and is angled toward the virtual plane, and the second first-ramp portion faces and is angled away from the virtual plane.

19. A method for assembling a magnetic storage device, the method comprising:

affixing a ramp support to a base plate of the magnetic storage device, the ramp support comprising:

a first ramp comprising:

a first-ramp receiving end; and

a first-ramp surface, comprising:

a first first-ramp portion; and

a second first-ramp portion; and

a second ramp comprising an end, offset laterally from the first-ramp receiving end in a direction along a virtual plane that is interposed between the first ramp and the second ramp,

wherein in the direction along the virtual plane, the first first-ramp portion faces and is angled toward the virtual plane, and the second first-ramp portion faces and is angled away from the virtual plane.

Assignments (3)

Continuity (2)

References Cited (13)