| 摘要 |
PURPOSE:To attain guard bandless azimuth recording with one head constitution by providing a mechanism which can control a rotation in an azimuth direction at a head, and switching the azimuth direction to a section where the head does not process a signal. CONSTITUTION:When right and left piezoelectric elements 7a and 7b mutually expand and contract, respective levers 8 rotates in different directions, and as a result, since a fitting board 6 of a head 1 rotates, the azimuth angle can be controlled according to the impressing voltage of the piezoelectric elements. Pulses are generated at every rotation of a drum from a pulse generator PG 12, one of the outputs of a data processing part 15 inputted from a waveform shaping device 14 is inputted to an azimuth controlling logic and synchronizing circuit part 17, here, the control signal of a microcomputer 18 drives piezoelectric element driving circuits 19a and 19b, and the azimuth of the head 1 is controlled. Thus, by making the title device with a one-head constitution, the dispersion between the heads can be eliminated, and the guard bandless azimuth can be easily recorded and reproduced. |
