Patent ID: 8189289

Claim:
A disk drive comprising: a motor; a hub coupled to a spindle shaft of said motor; at least two disks each having a center hole and being coupled to said hub; and a spacer having a center hole, said spacer disposed around said hub such that said hub is disposed within said center hole of said spacer, said spacer sandwiched between and in contact with said two disks to define a spacing between said two disks, and said spacer comprising: at least two conductive rings each having a center hole, said two conductive rings disposed around said hub such that said hub is disposed within said center hole of said two conductive rings, said two conductive rings secured between said two disks; a damping sheet configured to absorb vibration between said two conductive rings; and a conductive ring-shaped spring having a spring characteristic in a radial direction of said disks to make a diameter variable, said conductive ring-shaped spring in contact with both of said two conductive rings.