| 摘要 |
PURPOSE:To enable miniaturization, light weighing and high speed driving of a device by mounting in parallel plural head sick assembly bodies for magnetic disk device and by arranging with approach or contact or by combining via a ferromagnetic body the space between adjoining yokes of a same polarity outermagnetic type magnetic circuit and by having the action of a repulsive magnet each other on the adjoining magnetic circuit themselves. CONSTITUTION:The 1st, 2nd two HDA1, 2 are mounted in parallel in a frame 16, adjoining yoke 8 at positive pole side of the 1st HDA1 and a yoke 8 at positive pole side of the 2nd HDA2, a yoke 9 at negative pole side of the 1st HDA1 and yoke 9 at negative pole side of the 2nd HDA2 are respectively arranged with approach. In this way both outermagnetic type magnetic circuits act as repulsive magnets each other to reduce the leaking magnetic flux (loss magnetic flux) leaking to the space of the center part located between both magnetic circuits. The efficiency is therefore improved with the percentage of the effective magnetic flux in an air gap 15 becoming large on both the magnetic circuit of the 1st HDA1 and magnetic circuit of the 2nd HDA2.
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