Patent ID: 7283324

Claim:
A disk drive device comprising: a case having a bottom surface and a cover; a motor having a rotatable hub and located in the case; a plurality of disks which are supported on the hub and rotated by the motor, each of the plurality of disks has a first no-data recording region situated at an outer peripheral edge portion, a second no-data recording region situated at an inner peripheral edge portion, and a data recording region situated between the first and second no-data recording regions; a plurality of heads corresponding to recordable/readable surfaces of said plurality of disks, said plurality of heads processing information for said plurality of disks; and a stabilizer having a stabilizer plate located between adjacent ones of the plurality of disks and opposed to surfaces of the adjacent ones of the plurality of disks with gaps therebetween and a plurality of support portions which extend from the stabilizer plate outside the plurality of disks, said plurality of support portions being sandwiched between the bottom surface and the cover of the case, and supporting the stabilizer plate, the stabilizer plate has a first region which faces the first no-data recording regions of the disks, a second region which extends from the first region toward an inner peripheral side of the disks, and a third region which faces the second no-data recording region of the plurality of disks, the first and third regions being thicker than the second region.