Head supporting mechanism

摘要

A load beam (20) is attached to an actuator arm that is allowed to rock around a pivotal axis by a voice coil motor, etc., as a slider supporting member, the base end of a flexure (30) is attached to the load beam (20) with the free end thereof being left, a slider supporting member (32) is attached to the top portion of the flexure (30), a slider (50) on which a recording/reproduction head (60) is installed is secured to the slider supporting member (32), and the slider supporting member (32) is supported by a protrusion (28) placed on the free end side of the load beam (20) so as to be freely pivot thereon. Portions of the flexure (30) corresponding to both of the sides of this protrusion (28) are constituted by elastic hinge portions, each having a necked shape. A pair of thin-film piezoelectric elements (40a, 40b) are bonded to the flexure (30) as displacement members. In a tracking compensation operation of the head, forces are exerted on the slider supporting member (32) through the elastic hinge portion by extending and contracting operations of the pair of thin-film piezoelectric elements so that the slider (50) is allowed to pivot around the protrusion (28) of the load beam serving as the center of pivotal movements, together with the slider supporting member (32).