Actuator using piezoelectric element and head-positioning mechanism using the actuator
A technology of piezoelectric elements and positioning mechanisms, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve problems such as high dimensional accuracy
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[0162] Before describing the preferred embodiment, a description with Figures 24 to 29 A common head actuator for the head positioning mechanism shown.
[0163] It has been proposed that in conventional disk drives, a second actuator which follows the magnetic track is mounted on the front end of the head actuator arm. This second actuator is capable of finely moving the magnetic head at the front end of the arm independently of the movement of the magnetic head actuator.
[0164] Figure 24 A head actuator disclosed in JP-A-3-69072 is shown, in which, in addition to the main actuator 110 of the magnetic disk drive 100, there is a sub-actuator 120 mounted on the front end of an arm 111. The sub-actuator 120 is adapted to slowly move the magnetic head 114 using two multilayer piezoelectric elements 123 . The sub-actuator 120 includes two multi-layer piezoelectric elements, and each piezoelectric element 123 is composed of a plurality of piezoelectric elements adapted to mov...
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