Head stack assembly for a disk drive having a plastic inner sleeve
US5894382A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 1998 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Jan 5, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic disk drive with a head stack assembly includes a body portion, a coil portion cantilevered from one side of the body portion, and an actuator arm cantilevered to the opposite side of the body portion, wherein the body portion includes a plastic inner sleeve to provide a quick, press-fit connection with a pivot bearing cartridge. The body portion further includes a non-plastic outer portion which is preferably part of an aluminum E-block having integrally formed actuator arms. The plastic inner sleeve and non-plastic outer portion preferably include a spline and a recess, respectively, that are firmly compressed together by the press-fit connection to prevent relative angular motion. The plastic inner sleeve preferably includes a flat that is aligned with the spline and recess in order to contact the pivot cartridge along the flat and thereby ensure that the press-fit forces are focused onto the spline and recess. The preferred head stack assembly further includes a molding port at a rear portion of the non-plastic outer portion so that the plastic inner sleeve and a plastic overmold of the coil portion may be simultaneously formed and interconnected via the molding port,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.