| 摘要 |
PURPOSE:To eliminate the need to attach and detach a belt when attaching and detaching a data module by eliminating a pulley on a data module side with regard to the attchment structure of a small-sized data module of a magnetic disk. CONSTITUTION:On the module base 11 of a data module, a magnetic disk is supported pivotally. At the lower end part of a magnetic disk spindle 16, a holder plate 18 having an external diameter nearly equal to the external diameter of a pulley 20 is fixed. Once the data module is mounted on the top surface of a main base 8, a male taper 21 and a female taper 17 engage each other and are then positioned to form the magnetic path of a magnet 22 at the outer circumferential part of the magnet 22, an armature ring 19, and the pulley 20, thereby attracting the holder plate 18 and pulley 20 into one body. Therefore, the magnetic disk rotates at the same rotational frequency with the pulley 20 through the belt 24. |
