| 摘要 |
PURPOSE:To attain miniaturization and thin profile for a magnetic field generating part by prolonging the 1st and 2nd magnetic poles over the entire recording region in the 1st direction of a recording medium and arranging an optical head having a magnetic path forming member and a magnetic core wound with a coil while clipping the recording medium. CONSTITUTION:The magnetic flux of the electromagnetic coil 9 wound at the surrounding of the core 11 reaches a central magnetic pole 5 through a yoke 13 from one end of the magnetic core 11, reaches the magnetic path forming member 21 from the central magnetic pole 5 while being penetrated through the recording medium 1 and returns to the magnetic core 11 from other yoke 15 through an outer magnetic pole 7 from the magnetic path forming member 21 through the recording medium 1. The magnetic flux passes through the magnetic circuit as above. As a result, the magnetic flux is concentrated on a part of the recording medium 1 where the magnetic forming member 21 of the recording medium 1 is located beneath it and the laser light from the optical head 17 is irradiated, a strong magnetic field is applied to the part of the said recording medium 1 to record or erase the information. Since the magnetic core and the coil are arranged to a side where an optical head of the recording medium is arranged, thin profile and miniaturization of an information recorder are attained. |
