Patent ID: 8438586

Claim:
A drive device for an optical disc apparatus, comprising: an optical pickup; a guide shaft for movably supporting the optical pickup; a lead screw; a resin tooth fixed to the optical pickup, the tooth extending toward the lead screw in a cantilevered state, meshing cogs thereof being in meshed engagement with the lead screw, and the tooth being advanced following the rotation of the lead screw; and a tooth spring for urging the meshing cogs in the direction of meshing with the lead screw; wherein the tooth comprises a tooth body fixed to the optical pickup, a plurality of support pieces projecting from the tooth body toward the lead screw, a plurality of resin spring pieces having a base part on the projecting end of each of the support pieces and extending in a direction orthogonal to the axial direction of the lead screw, a plate part provided with a base part on the extending ends of the resin spring pieces and formed in a direction parallel to the axial direction of the lead screw, meshing cogs formed on the plate part on the side near the lead screw, and a linking part formed across the space between the support pieces and/or the resin spring pieces; and wherein the tooth spring is disposed so as to urge the tooth body and the plate part in a space between the resin spring pieces.