| 摘要 |
PURPOSE:To simplify a unit by forming a step part and holes of a driving hub and also by using an eccentric pin. CONSTITUTION:Driving hub 1 is provided with ring step part 6' and pin insertion holes 7, and eccentric pin 8 is used. Into pin insertion holes 7, eccentric pins 8 with eccentric surfaces differing in diameter gradually from the axis core of the pin are inserted respectively and while they are implanted upright, eccentric pins 8 are turned to make eccentric surfaces in contact with the inside surface of 1st ring spacer 4c. Consequently, 1st magnetic disk 3a and 1st ring spacer 4a are positioned in contact with ring step part 6', and 2nd and 3rd magnetic disks 3b and 3c and 2nd ring spacer 4b are positioned being guided by eccentric pins 8. |
