Magnetic recording/reproduction apparatus

Claim 1

An image information recording apparatus using a magnetic disk as a recording medium, the magnetic disk having a plurality of recording tracks and a rotating position detection index at a position on the outer periphery of a hub in a central portion thereof, comprising: means for rotating a magnetic disk; detection pulse generating means for generating a pulse train representative of a rotating state of a magnetic disk, a pulse being generated by said detection pulse generating means at every rotation of the rotating position detection index on the magnetic disk; timing pulse generating means for generating timing pulses which are in-phase with said pulse train generated by said detection pulse generating means; a composite magnetic head having integrated erase and read/write gaps separated from each other for respectively erasing and recording image information with respect to said magnetic disk; image information receiving means for receiving image information to be recorded on a magnetic disk; first instruction receiving means for issuing a first instruction signal for starting an information recording operation in response to a first instructing operation of an operator; second instruction receiving means for issuing a second instruction signal for selecting a successive image recording mode in response to a second instructing operation of the operator; erasing signal generating means for generating an erasing signal for erasing a recorded information on said magnetic disk; and sequential change-over timing determining means for determining a sequential change-over timing for selectively supplying the image information received by said image information receiving means or the erasing signal generated by said erasing signal generating means to said composite magnetic head, in synchronism with successive timing pulses generated by said timing pulse generating means, said sequential change-over timing determining means enabling repeating an erasing and recording operation cycle in a single recording track on a magnetic disk whenever both said first and second instruction signals of said first and second instruction receiving means are applied to said sequential change-over timing determining means.