Patent ID: 7570460

Claim:
A pivot assembly having a pivot receiving surface for rotatably supporting a head supporting mechanism having a head/slider flying over a magnetic disk mounted thereon, the pivot receiving surface comprising: a first projection, a second projection and a third projection for supporting an abutment surface of the pivot assembly with each top surface of the projections wherein, the first projection is formed at a position through which an outside center line Or an inside center line passes, or between the outside center line and the inside center line through which a rotation center line passes when the rotation center line of the head supporting mechanism is defined as a line passing through the center of the pivot assembly and the center of an edge on a side on which a head in the head/slider is mounted, the inside center line is defined as a line of the rotation center line when the head/slider is located at the most inside position at which the head/slider flies over the magnetic disk, and the outside center line is defined as a line of the rotation center line when the head/slider is located at the most outside position at which the head/slider flies over the magnetic disk; the second projection is formed in one region of the base bisected by the Rotation center line passing through the first projection; and the third projection is formed in the other region of the base bisected by the rotation center line passing through the first projection.