| 摘要 |
PURPOSE:To provide driven bodies with sufficient displacement and to keep their deflection angle within tolerance by a method wherein electrodes provided on the both surfaces are constructed so that no non-deflection regions may be present resulting from gaps between the electrodes in the entire width of the main body. CONSTITUTION:Between the outer electrodes 11, 13 of one piezoelectric element 1 is a linear sideways gap 15 separating them from each other. A similar gap 16 separates an outer electrode 12 from an outer electrode 14 in the other piezoelectric element 2. With regions of no deflection absent in the bimorph piezoelectric elements 1, 2, when the displacement of a video head is 50mum in 50% of the counter electric field, they meet the record carrier 4 at 0.1 deg. (generally called the angle of deflection), which is a satisfactory value for general use. |
