Abstract: A support (611) that is substantially cylindrical so as to be received by a disk hole (1NA) and has a positioning portion (612) on a circumference adjacent to a first axial end is provided with an engagement/disengagement concave portion (613) of which both ends open to the circumference along a radial direction. A first engaging portion (614) protrudes from around the circumference at which a first axial end of the engagement/disengagement concave portion (613) opens substantially opposes to the positioning portion (612) with a gap equal to or more than a thickness of an optical disk (1N). A moving member (615) is disposed in the engagement/disengagement concave portion (613) in a manner movable along a radial direction of the support (611).

Abstract: An optical disk drive is adapted for reading data from an optical disk. The optical disk drive includes a housing, a tray, and a read module. The tray is disposed in the housing and is adapted for ejecting from the housing. The read module is adapted for reading data from an optical disk. The read module includes a turntable and an optical read head. The turntable includes a number of engaging springs, in which at least one of the engaging springs include added material for superposing the center of the optical disk and the center of the turntable. Furthermore, the optical read head is adapted to move along a tracking path for reading data from the optical disk.

Abstract: A data storage device having at least one rotatable disk and at least one actuator arm assembly for writing data onto the disk and reading the data recorded on the disk is provided. The data storage device comprises a first plate with the spindle motor being secured only to the first plate. A first actuator arm assembly is secured only to the first plate. A second plate is secured to the first plate. A second actuator arm assembly secured only to the second plate.