Disk drive apparatus, hard disk drive, and enclosure for hard disk drive

A disk drive apparatus, comprising:

• a disk driving source for rotationally driving a disk medium, the medium being used to store data;
• an actuator pivotally mounted to a rotating shaft, to which a head is attached to read and write data from and on the disk medium;
• an enclosure for containing t e disk driving source and the actuator, the enclosure having an opening, a bottom plate for supporting the rotating shaft, a peripheral wall at an outer periphery of the bottom plate, and a rib formed on the bottom plate tat extends from the peripheral wall toward the rotating shaft, the rib being on both sides of an axis of the rotating shaft;
• and wherein
• a connection rib is formed between the rib on both sides of the axis of the rotating shaft in order to connect both of the ribs to each other.

A disk drive apparatus, comprising:

• a disk driving source for rotationally driving a disk medium, the medium being used to store data;
• an actuator pivotally mounted a rotating shaft, and having a head to read and write data from and on the disk medium;
• an enclosure for containing the disk driving source and the actuator, the enclosure having an opening formed therein by a peripheral wall formed at the periphery of a bottom plate;
• a cover for sealing the opening in the enclosure at a plurality of locations;
• a gasket interposed between the cover and the peripheral wall of the enclosure;
• a vibration absorbing member in a contact with the cover on an inside portion where the cover is opposed to the peripheral wall;
• and
• the vibration absorbing member being held between a wall body formed in the enclosure at a periphery of an actuator driving surface for driving the actuator and the cover, the wall body being a rib for reinforcing the enclosure.

A hard disk drive, comprising:

• a disk enclosure having a box-shaped base with an opening and a cover for sealing the opening;
• a disk medium for storing data magnetically, the disk medium being rotationally driven by a spindle motor;
• an actuator having a magnetic head for reading and writing data from and on the disk medium to seek the magnetic head relative to the disk medium by moving pivotally around a pivot, wherein the base supports the pivot, and a stiffness reinforcing portion for reinforcing stiffness of the base is formed at an area where a reaction force acts on the base via the pivot by pivotal motion of the actuator;
• and
• the base having a bottom plate for supporting the pivot and a peripheral wall formed along an outer periphery of the bottom plate, and the stiffness reinforcing portion is a rib formed integrally with the bottom plate, and the rib is L-shaped and has an extending portion extending from the peripheral wall and a bent portion bent from a tip end of the extending portion.