Rotary magnetic head drum apparatus

摘要

A rotary magnetic head drum apparatus for a video tape recorder of a helical scan type having small projecting members provided on a fixed drum of a rotary magnetic head assembly in the vicinity of the switching positions at the entrance and exit sides for a magnetic tape. The projecting members cause the magnetic tape locally to be displaced radially outward from the surface of the fixed drum so as to reduce longitudinal vibration of the magnetic tape and hence reduce impact error in a signal reproduced on the magnetic tape by two rotary magnetic heads.