Head stack assembly and hard disk drive having the same

Abstract

A hard disk drive includes a head stack assembly including a read/write head mounted thereon and an actuator arm pivoting over a disk around a pivot shaft installed on a base, a pivot shaft holder rotatably supporting the pivot shaft and to which the actuator arm is coupled, and a bobbin provided at the opposite side of the actuator arm with respect to the pivot shaft holder and having a voice coil motor coil installed on at least one surface thereof, a crash stop coupled to the base and restricting displacement of the actuator arm, and a contact area reduction portion provided on at least one of the bobbin and the crash stop and including at least one non-contact section, in which the bobbin and the crash stop do not contact each other, in a contact section of the bobbin and the crash stop, when the bobbin and crash stop contact each other, to reduce the contact area between the bobbin and the crash stop.

Dependencies are inferred from the claim text.