| 摘要 |
PURPOSE:To improve remarkably the reliability for preservation of a magnetic disk by providing a spoiler concentrically at the outer fringe of the disk and at the same time drilling an air discharge hole to a case that stores the disk rotatably. CONSTITUTION:A spoiler 7 is fixed to both case upper and lower plates concentrically to the outer fringe of a magnetic disk. An air discharge hole 4a is drilled to the case side plate, and a dustproof filter 4b is set to the hole 4a in order to eliminate the disturbance of the air current within a cartridge. Thus the magnetic disk is revolved at high stability and high accuracy. Furthermore the dust is prevented from entering the cartridge. As a result, the reliability is remarakably improved for preservation of the magnetic disk. |
