Bearing mechanism for head used in magnetic disk drive and magnetic disk drive having the same

A bearing mechanism for a head used in a magnetic disk drive, comprising:

• a base including a bearing hole;
• an inner shaft joined to the bearing hole in the base;
• a receiving surface formed to surround the bearing hole in the base;
• an outer sleeve mounted with a head stack assembly included in the magnetic disk drive;
• a bearing structure swingably connecting the outer sleeve, in which the inner shaft is internally inserted, to the inner shaft;
• and
• a gap defined between an end face of the outer sleeve, facing the base, and the receiving surface, the gap having a clearance of about 0.12±0.03 mm and a length of about 0.7 to 1.0 mm.

A bearing mechanism for a head used in a magnetic disk drive, comprising:

• a base including a bearing hole;
• an inner shaft joined to the bearing hole in the base;
• a receiving surface formed to surround the bearing hole in the base;
• an outer sleeve mounted with a head stack assembly included in the magnetic disk drive;
• means for swingably connecting the outer sleeve, in which the inner shaft is internally inserted, to the inner shaft;
• and
• a labyrinth seal structure provided between an end face of the outer sleeve, facing the base, and the receiving surface.