Low-inertia actuator coil for a disk drive
US5768061A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1997 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Feb 3, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4806
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A head stack assembly for a disk drive includes a swing-type structure, a head gimbal assembly, and a coil. The swing-type structure has a bore defining a bore axis. The head gimbal assembly is cantilevered from the swing-type structure to project radially away from the bore axis. The head gimbal assembly includes transducing structure for writing to and reading from the recording surface of a disk. The coil is cantilevered from the swing-type structure to project radially away from the bore axis in a direction opposite from the head gimbal assembly. The coil has a shape to provide a current flow path that includes first and second multi-leg portions that are spaced from each other in a direction parallel to the bore axis. Each of the multi-leg portions is generally C-shaped, substantially perpendicular to the bore axis, open at its end that is remote from the bore axis, and includes two radially-extending legs such that the current flow path provides four radially-extending legs with the four radially-extending legs being positioned such that upon installation of the head stack assembly into the disk drive the four radially-extending legs occupy an annular region in which a magnet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.