| 摘要 |
PURPOSE:To make a core which is exclusively used for erasure only and erase current supply circuit unnecessary so that the cost of a magnetic head can be reduced by providing gap sections having gaps which are broader than and nonparallel with a recording and reproducing gap on both sides of the recording and reproducing gap. CONSTITUTION:Gaps which have crests and troughs formed by the combination of plural slopes and are broader than a central recording and reproducing gap are formed on both sides of the central recording and reproducing gap. Since, when a recording current is made to flow to a coil 13 wound around one core half body 11a, magnetic fields of phases different from the phase of the magnetic field produced in the central recording and reproducing gap are produced simultaneously with the information recording on a medium at the central gap, old information recorded on both side sections of the recording track on the medium is erased. Even in the case of reproduction, no signals are produced from both side gaps, since phases of signals read out from both side gaps are different from the phase of signals read out from the central gap. |
