초록 ▼

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 c

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 ata 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, the molding port and plastic interconnection serving to prevent relative longitudinal motion.

대표청구항 ▼

[ I claim:] [1.] A head stack assembly for a disk drive, the head stack assembly comprising:a body portion, the body portion including:a plastic inner sleeve, the plastic inner sleeve including:an inner sleeve surface defining a bore having a longitudinal boreaxis and including a plurality of circum

[ I claim:] [1.] A head stack assembly for a disk drive, the head stack assembly comprising:a body portion, the body portion including:a plastic inner sleeve, the plastic inner sleeve including:an inner sleeve surface defining a bore having a longitudinal boreaxis and including a plurality of circumferentially positioned flats,each flat extending in the direction of the longitudinal bore axis; anda non-plastic outer portion;the plastic inner sleeve and the outer portion defining holding means for holding in place the plastic sleeve, the holding means including:means for preventing relative angular motion between the plasticinner sleeve and the outer portion;an actuator arm cantilevered from the body portion; anda coil portion cantilevered from the body portion in an opposite direction from the actuator arm.