| 摘要 |
PURPOSE:To decrease the number of magnetic heads and to reduce the size of a drum by providing a supporting member extending between a couple of piezoelectric elements arranged successively to a rotary drum, fitting a magnetic head to its center, and displacing the couple of piezoelectric elements in the opposite directions to an azimuth angle. CONSTITUTION:A holding member 21 is fixed so that the rotating shaft of the rotary drum run through the hole 22 of the member 21, and the piezoelectric elements 24a and 24b are fitted atop of a substrate 23 fixed to the holding member 1 in parallel at an interval. Adhering members 25a and 25b as lever fulcrum are provided on the piezoelectric elements 24a and 24b, the supporting member 26 is provided thereupon extending to between them, and the magnetic head 27 is fitted to the center. The piezoelectric element 24a is contracted and the other piezoelectric element 24b is extended to set the magnetic head 27 at the azimuth angle. Consequently, the number of magnetic heads is decreased and the rotary head is reduced in size. |
