| 摘要 |
PURPOSE:To avoid separation between a magnetic head and a recording medium despite the bend of a bimorph piezoelectric element supporting the magnetic head and at the same time to obtain a thin and compact displacement device for the magnetic head, by setting said piezoelectric element so that the bent plane of the piezoelectric element is set parallel with a magnetic recording medium. CONSTITUTION:A pair of bimorph piezoelectric elements 18f and 18f are set to that the polarizing directions of piezoelectric elements 11f and 12f are set opposite to those of piezoelectric elements 11r and 12r and also that an electrode 13f is connected to an electrode 13r via a connection line 32 together with electrodes 16f and 16r connected via a connection line 33 respectively. In such a constitution, both bent electric terminals 22 and 23 bend in the direction opposite to each other when the drive voltage is applied between both terminals 22 and 23. Furthermore, the length is fixed at the same value among those elements 11f, 12f, 11r and 13r so as to secure the same bend value between both elements 18f and 18r. Then both elements 18f and 18r are set so that their bent displacement planes are parallel with the plane of a magnetic disk (magnetic recording medium) 24.
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