ROTARY HEAD ASSEMBLY

专利名称：ROTARY HEAD ASSEMBLY发明人：ONO MASAHARU,KAZAMA

SABURO,YAMASHITA TOMOHITO

申请号：JP18188788申请日：19880722公开号：JPH0233716A公开日：19900202

摘要：PURPOSE:To widely reduce rotational ununiformity by unitedly providing thestator coil of a brushless motor in the bottom surface body structure part of a fixeddrum or in the fixed part of a central fixed shaft, etc. CONSTITUTION:A rotator magnet10 is concentrically fixed through a rotator yoke 12 to the lower end face of a disk 14 anda stator coil 11 is unitedly fixed in the bottom surface body structure of a fixed drum 3. Awiring substrate 18 and a fixed yoke 13 are laminated and fixed on the lower surface ofthe fixer coil 11 and on the surface of the wiring substrate 18, the terminal connec tion ofthe stator coil 11 or the terminal connection of a magnetic field detecting element 17 isexecuted. The magnetic field detecting element 17 is arranged in order to detect themagnetic field of the rotator magnet 10. Then, control feeding is executed form anexternal driving electronic circuit and rotation driving force is generated in the rotatormagnet 10. After that, a rotary drum 2 and rotary magnetic heads 5 and 5', which arelinked to this magnet, are rotated.

申请人：HITACHI LTD

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