| 摘要 |
PURPOSE:To increase the accuracy of head positioning position, by making unchanged the falling angle of a spindle to the base surface, through the location of a spindle pulley at the location between the upper and lower bearings. CONSTITUTION:A spindle pulley 13 is over-hung to a lower bearing 4 and a belt 14 is belted on the pulley 13 at the middle between the upper and lower bearings 3 and 4. When a tension of the belt 14 exerts to a spindle 5, the upper and lower bearings 3, 4 are pushed aside on side, and the falling angle to the spindle base 2 is zero and the accuracy of disc rotation and head positioning of a disc fitting hub 6 are guaranteed. |
