| 摘要 |
PURPOSE:To eliminate mutual interference between coils and to simplify a manufacturing process by employing a main magnetic pole exciting type head as a recording and reproducing core and a ring type head as an erasing core, and arranging the recording and reproducing coil and erasing coil at distance. CONSTITUTION:The recording and reproducing core 21, erasing core 22, and nonmagnetic bases 23 and 24 are laminated; and the recording and reproducing core 21 uses the main magnetic pole exciting type head equipped with a thin layer 19 having high magnetic permeability and ferrite 25 and a coil is arranged at a position 32. The erasing core 22 uses the ring type head having the closed magnetic path of materials 26, 27, and 28 with high magnetic permeability and also having a gap 20, and a coil is arranged at a position 33. Thus, the recording and reproducing coil and erasing coil are at distance and the erasing core 22 has the closed magnetic path, so the leakage of magnetic flux from the cores is small and the influence upon the recording and reproducing core is ignored. |
