| 摘要 |
PURPOSE:To prevent a magnetic head from inclination and separation from a medium by connecting a pair of bimorph piezoelectric elements so that their bending directions are reversed to each other and arranging a piezoelectric element to be expanded/contracted between one bimorph piezoelectric element and a supporting board. CONSTITUTION:A pair of bimorph piezoelectric elements 18f, 18r fitting a magnetic head 20 are connected so that the polarizing direction of piezoelectric elements 11f, 12f is reversed from that of piezoelectric elements 11r, 12r. On the other hand, the laminate pizoelectric element 31 to be expanded by impressing a voltage is arranged between the element 18r and the supporting board 19. When voltage is impressed between curved electric terminals 22, 23 in said constitution, the elements 18f, 18r are bent so that respective bending directions are reversed and the head 20 is vertically moved without being inclined from the recording medium 20. Although the head 20 is separated from the medium 24 because of the movement, the separation can be compensated by impressing a voltage to the piezoelectric element 31.
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