| 摘要 |
<p>A rotary magnetic head device for a helical scanning magnetic recording and reproducing apparatus comprises a rotary drum, a thin-film magnetic head (6) protruding from said rotary drum in a diametrical direction for coming into contact with a magnetic tape (7), obliquely woundable around part of the outer peripheral surface of said rotary drum, and head control means for adjusting the protrusion of the magnetic head (6) in the diametrical direction. The head control means comprises a feed-forward control arrangement (9) to bring and hold the magnetic head into a protruded position in which it exerts a constant normal force on a tape (7) wound around the drum.</p> |
