| 摘要 |
<p>A rotary head for use in a magnetic recording and reproducing apparatus includes a fixed cylinder (3), a rotary cylinder (2) opposed to the fixed cylinder (3), two electrically controllable movable elements (4a, 4b) mounted on the rotary cylinder (2) so as to be 180 DEG apart from each other, at least two magnetic heads (5a, 5b) secured to the movable elements (4a, 4b), respectively, at least one reference surface (7; 7a, 7b) provided on the rotary cylinder (2), and a position detector element (8) for detecting the position of the movable elements (4a, 4b) and that of the reference surface (7; 7a, 7b). The rotary head further includes a control system (13) for controlling the movable elements (4a, 4b) in response to an output from the position detector element (8) so that the magnetic heads (5a, 5b) may be located appropriately with respect to the reference surface (7; 7a, 7b). <IMAGE></p> |
