Head stack assembly cartridge
View Patent ↗According to one aspect of the present disclosure, a head stack assembly cartridge is provided. The head stack assembly cartridge includes a base plate having a pivot shaft for pivotally mounting a head stack assembly and a base voice coil motor magnet attached to an inner surface of the base plate. The base voice coil motor magnet is arranged on the inner surface of the base plate to be adjacent to a coil of the head stack assembly pivotally mounted on the pivot shaft. The head stack assembly cartridge further includes a cover removably attached to the base plate and a pivot clamp removably attached to the cover and configured to secure the head stack assembly pivotally mounted on the pivot shaft.
1. A head stack assembly cartridge, comprising:
a base plate having a pivot shaft for pivotally mounting a head stack assembly;
a base voice coil motor magnet attached to an inner surface of the base plate, wherein the base voice coil motor magnet is arranged on the inner surface of the base plate to be adjacent to a coil of the head stack assembly pivotally mounted on the pivot shaft:
a cover removably attached to the base plate; and
a pivot clamp removably attached to the cover and configured to secure the head stack assembly pivotally mounted on the pivot shaft,
wherein the pivot clamp is configured to be seated on a fulcrum on the cover and on a pivot screw attaching the head stack assembly to the pivot shaft of the base plate, and
wherein the pivot clamp is removably attached to the cover with a load screw operable to apply a load to the pivot screw.
2. The head stack assembly cartridge according to claim 1 , wherein the pivot clamp comprises a triangular plate having a first corner and a second corner configured to be seated on the fulcrum and a third corner configured to be seated on the pivot screw.
3. The head stack assembly cartridge according to claim 2 , wherein the fulcrum comprises a first pin and a second pin set in the cover, the first pin arranged to seat the first corner of the pivot clamp and the second pin arranged to seat the second corner of the pivot clamp.
4. The head stack assembly cartridge according to claim 3 , the pivot clamp further comprising a third pin set in the third corner of the pivot clamp and arranged to be seated on the pivot screw.
5. The head stack assembly cartridge according to claim 4 , wherein the load screw for removably attaching the pivot clamp to the cover is arranged along an altitude of the triangular plate extending from the third corner.
6. A head stack assembly cartridge, comprising:
a base plate having a pivot shaft for pivotally mounting a head stack assembly;
a base voice coil motor magnet attached to an inner surface of the base plate, wherein the base voice coil motor magnet is arranged on the inner surface of the base plate to be adjacent to a coil of the head stack assembly pivotally mounted on the pivot shaft;
a cover removably attached to the base plate; and
a pivot clamp removably attached to the cover and configured to secure the head stack assembly pivotally mounted on the pivot shaft,
wherein the base plate further comprises a pivot arm configured to pivotally couple the head stack assembly cartridge to a disk spindle assembly pack.
7. The head stack assembly cartridge according to claim 6 , wherein the pivot arm comprises a bore arranged to receive a pivot pin of the disk spindle assembly pack.
8. The head stack assembly cartridge according to claim 6 , wherein the base plate further comprises an alignment mount configured to align the head stack assembly cartridge with the disk spindle assembly pack in a closed position.
9. The head stack assembly cartridge according to claim 8 , wherein the alignment mount further comprises a fastener for securing the head stack assembly cartridge to the disk spindle assembly pack.
10. The head stack assembly cartridge according to claim 9 , wherein the fastener comprises a thumb screw.
11. The head stack assembly cartridge according to claim 6 , further comprising a ramp attached to the inner surface of the base plate,
wherein the ramp is configured to support a head gimbal assembly of the head stack assembly in a parked position.
12. The head stack assembly cartridge according to claim 6 , further comprising:
a first stop attached to the inner surface of the base plate and arranged to limit the angular displacement of the head stack assembly in a first direction; and
a second stop attached to the inner surface of the base plate and arranged to limit the angular displacement of the head stack assembly in a second direction.
13. The head stack assembly cartridge according to claim 6 , further comprising a cover voice coil motor magnet attached to an inner surface of the cover,
wherein the cover voice coil motor magnet is arranged on the inner surface of the cover opposite the base voice coil motor magnet attached to the inner surface of the base plate and to be adjacent to the coil of the head stack assembly pivotally mounted on the pivot shaft.