Abstract: In an optical recording medium drive apparatus, an optical recording medium is illuminated with a laser beam emitted from a head via an objected leans, and the head detects light reflected from the optical recording medium being illuminated with the laser beam. A signal generator generates a reflected light signal in accordance with the reflected light detected by the head. A controller drives the objective lens via a focusing unit, and detects peaks in the reflected light signal obtained when the objective lens is driven in a focusing direction. The controller determines whether the optical recording medium is of a single layer type or a multiple layer type by determining whether a pattern of the detected peaks is similar to one of patterns which can occur if the optical recording medium is of the single layer type.

Abstract: An optical recording medium driving device includes an optical head, an evaluation signal generating section, a focus servo section, a spherical aberration correction section, a focus bias adjuster, and a system controller. The optical head has a focus serve mechanism and a spherical aberration correction mechanism, irradiates a laser light, and detects a reflected light. The evaluation signal generating section generates, based on the reflected light, an evaluation signal. The focus servo section drives the focus servo mechanism according to a focus error signal to perform focus servo. The spherical aberration correction section drives the spherical aberration correction mechanism to perform spherical aberration correction. The focus bias adjuster adds focus bias to a focus loop. The system controller performs an operation for fixing an adjustment spherical aberration correction value.

Abstract: A disk drive apparatus includes: head means for performing laser irradiation to and detection of reflected light from an optical disk recording medium and having a focus bias mechanism and a spherical aberration correction mechanism; focus bias means for driving the focus bias mechanism to add a focus bias to a focus servo loop; spherical aberration correction means for driving the spherical aberration correction mechanism based on a spherical aberration correction value; evaluation value creating means for creating an evaluation value based on reflected light information obtained by the head means; adjustment means for adjusting the focus bias and the spherical aberration correction value; and control means for determining whether data is written on at least one track of the tracks adjacent to an adjustment use range on the recording medium and controlling an adjustment operation on the focus bias and the spherical aberration correction value by the adjustment means based on the determination result.

Abstract: A disk drive device includes: a rotary arm rotatable according to loading of a disk between a draw-in position and an eject position for ejecting the disk from a housing; a drive mechanism providing driving force for the rotary arm; a link arm mechanism interconnecting the rotary arm and the drive mechanism and rotating the rotary arm from an insertion position to the eject position when ejecting the disk; and a guide cam having a guide edge on which a guide projection of the link arm mechanism slides when ejecting the disk to rotate the rotary arm in an ejecting direction via the link arm mechanism, the guide projection moving around the guide cam from insertion to ejection of the disk. Engagement between the guide projection and the guide edge is released when a force opposite to a rotation direction is applied to the rotary arm when ejecting the disk.

Abstract: A disk drive device includes a device main body in which a disk slot for inserting and removing a disk-like recording medium is provided, a disk holding unit that rotatably holds the disk-like recording medium, a main chassis that supports the disk holding unit and a base unit, an arm unit rotatably supported on one or the other side in a plane parallel to the disk-like recording medium, an urging arm that urges the disk-like recording medium, a first centering member that supports the side of the disk-like recording medium, and a second centering member that supports the side of the disk-like recording medium. The first centering member and the second centering member are regulated in positions to support the side of the disk-like recording medium. The first centering member and the second centering member support the disk-like recording medium in a centering position.

Abstract: A disk drive apparatus includes: a device main body which a disk-shaped recording medium is inserted and ejected therefrom; a loading arm which has an arm main body and a support part; a loading cam plate which has a cam groove and rotate the loading arm; a drive mechanism which is coupled to the loading cam plate; an eject arm which is rotatably supported; a link mechanism which couples the eject arm to the drive mechanism; and a cam unit which is engaged in the link mechanism, wherein a long hole is provided in one of the arm main body and the pivot part, and a protrusion part is provided in the other one which is inserted into the long hole.

Abstract: A disk transfer mechanism is disclosed, which includes: a transfer arm rotatably supported by an apparatus body to/from which a disk-shaped recording medium is inserted and removed, when the disk-shaped recording medium is inserted, rotated in an insertion direction by being pressed by the disk-shaped recording medium, and when the disk-shaped recording medium is ejected, rotated in an ejection direction to eject the disk-shaped recording medium; and a pickup section provided with a rotation axis supported at a tip end portion of the transfer arm rotatably in a direction substantially orthogonal to a main surface of the disk-shaped recording medium, and from the rotation axis, an abutting piece is protruded for abutting against the disk-shaped recording medium on a front side surface in the insertion direction inserted in the apparatus body, and a support piece is protruded for supporting a lower surface portion of the disk-shape recording medium.