Abstract: Provided is a smaller torque limiter. A torque limiter (30) according to a representative embodiment of the present invention is characterized by including: a first rotary body (32) to be rotated by a drive source; a first friction body (33) locked to the first rotary body; a second friction body (34) stacked on the first friction body and to be rotated with rotation of the first friction body by a friction force between the first friction body and the second friction body; a second rotary body (35) locked to the second friction body; at least one disc spring (37) for biasing the first friction body and the second friction body in the stacking direction of the first friction body and the second friction body; and a fastening member (39) for applying a compressive force to the disc spring.

Abstract: Provided is a smaller torque limiter. A torque limiter (30) according to a representative embodiment of the present invention is characterized by including: a first rotary body (32) to be rotated by a drive source; a first friction body (33) locked to the first rotary body; a second friction body (34) stacked on the first friction body and to be rotated with rotation of the first friction body by a friction force between the first friction body and the second friction body; a second rotary body (35) locked to the second friction body; at least one disc spring (37) for biasing the first friction body and the second friction body in the stacking direction of the first friction body and the second friction body; and a fastening member (39) for applying a compressive force to the disc spring.

Abstract: A disc device includes a casing, a disc processor, a drive motor, a transfer unit and a disc clamper. The transfer unit transfers an optical disc while holding the optical disc by driving the drive motor. The disc clamper switches a drive transmission of the drive unit in accordance with a holding condition of the optical disc with different diameters by the transfer unit to pivotally move the disc processor. The drive of the single drive motor effects both the transfer of the optical disc and the pivotal movement of the disc processor. A timing for transferring the optical disc and a timing for pivotally moving the disc processor can be suitably adjusted in accordance with the diameter of the optical disc.

Abstract: The disc device includes a casing, a drive unit, a disc processor swingably supported in the casing, and a first shift cam that swings the disc processor. The first shift cam restricts the swing of the disc processor to place the disc processor to each of an escape state, a clamp state, and a standby state. The standby state is a state in which the optical disc clamped to the turntable is allowed to keep a position apart from the opposing face of the casing while the disc processor is swung from the escape state to the clamp state. Accordingly, with no need to detect the position in the standby state with an arrangement such as separately-provided sensor, the disc processor can be placed in such a swinging state that the turntable can be controlled to be slightly rotated during the double clamp operation in a simplified arrangement. While preventing clamp failures, the optical disc can be favorably processed.

Abstract: A disc device includes a casing, a disc processor, a drive motor, a transfer unit and a disc clamper. The transfer unit transfers an optical disc while holding the optical disc by driving the drive motor. The disc clamper switches a drive transmission of the drive unit in accordance with a holding condition of the optical disc with different diameters by the transfer unit to pivotally move the disc processor. The drive of the single drive motor effects both the transfer of the optical disc and the pivotal movement of the disc processor. A timing for transferring the optical disc and a timing for pivotally moving the disc processor can be suitably adjusted in accordance with the diameter of the optical disc.

Abstract: On the inner surface of a guide rail (411) having a concave groove, which extends in the vertical direction along a motion path of a disc drive (200) moved by a mover unit (300), a biasing cam (412) having thickened swelling parts (412a) at both ends is so provided as to have the groove width narrowed at both the upper and lower ends. A plate spring (420) which is pressed into contact with a guide surface of the surface of the biasing cam (412) by elastic biasing force is attached integrally to the disc drive (200). At the home position where the disc drive (200) operates and at the position where the disc drive (200) is lifted up, the plate spring (420) is strongly pressed into contact by the swelling parts (412a), and the disc drive (200) can be prevented from being moved by impact or the like from outside during operation. While moving, the pressing force is weakened so that load applied by the mover unit (300) can be reduced.

Abstract: An optical-pickup feeding apparatus includes a pickup base on which an optical pickup is mounted, which includes a sliding bearing with a lubricant agent; and a lead screw that is slidably fitted into the sliding bearing. A peripheral surface of a screw thread of the lead screw is formed in a shape of a circular arc.

Abstract: An optical-pickup feeding apparatus includes a pickup base on which an optical pickup is mounted, which includes a sliding bearing with a lubricant agent; and a lead screw that is slidably fitted into the sliding bearing. A peripheral surface of a screw thread of the lead screw is formed in a shape of a circular arc.

Abstract: A disk player which can insert and extract a disk, while a disk is being played, into and out of a compact body. During a movement in which one of disk trays is being moved from a disk standby position to a disk playing position, the disk comes into engagement with a disk playing means supporting mechanism to move the disk playing means in a predetermined direction.

Abstract: On the inner surface of a guide rail (411) having a concave groove, which extends in the vertical direction along a motion path of a disc drive (200) moved by a mover unit (300), a biasing cam (412) having thickened swelling parts (412a) at both ends is so provided as to have the groove width narrowed at both the upper and lower ends. A plate spring (420) which is pressed into contact with a guide surface of the surface of the biasing cam (412) by elastic biasing force is attached integrally to the disc drive (200). At the home position where the disc drive (200) operates and at the position where the disc drive (200) is lifted up, the plate spring (420) is strongly pressed into contact by the swelling parts (412a), and the disc drive (200) can be prevented from being moved by impact or the like from outside during operation. While moving, the pressing force is weakened so that load applied by the mover unit (300) can be reduced.

Abstract: A disc drive (200), which has a disc tray (210) that carries an optical disc (10) and can be moved back and forth, is adapted to be moved out of and back into a case body (110) through an opening (111) by a mover unit. When the disc drive (200) is being moved, the drive operation of the spindle motor of the disc drive (200) is suspended to prevent the optical disc from rotating. The disc drive (200) is allowed to read information from and/or record information on the optical disc (10) only at the home position where it is housed in the case body (110) through the opening (111). Thus, the disc drive (200) is prevented from damaging the optical disc and other components by impact when it is being moved.

Abstract: A data recording apparatus having a main storage device, for recording information data stored in the main storage device, onto a recording medium of a removable storage device. The information data stored in the main storage device is managed in units of the recording capacity of the recording medium and is read in units of the recording capacity of the recording medium, from the main storage device, and recording of the read information data to the recording medium of the removable storage device is controlled.

Abstract: A disc player is provided with: a turn table (13) for rotating an information record disc, which is placed on the turn table; a clamper (15) for holding the information record disc between the clamper and the turn table; a chassis (10) on which at least one of the clamper and the turn table is mounted and which has a rotation shaft (11a, 11b) parallel to a main surface of the information record disc held between the clamper and the turn table; a driving device (8a, 12) for transmitting a driving force to the chassis so as to rotate the chassis with the rotation shaft at a rotation axis; and an optical pickup (20) for at least reading a signal from the information record disc held between the clamper and the turn table while the disc is rotated on the turn table. A gap (W) is prepared between the rotation shaft and a bearing (22b) for the rotation shaft in a direction parallel to the main surface such that the rotation shaft has a play in the direction parallel to the main surface.

Abstract: A skew adjusting apparatus for an optical disc player makes a positional adjustment of a guide member of a carriage for a pickup relative to a chassis. A movable body is disposed on the chassis. The movable body has at one end thereof a supporting member for the guide member and the other end thereof a connection member to the chassis. An adjusting device for making a positional adjustment of the guide member through the supporting member in the thickness direction of the chassis is disposed between the chassis and the movable body so as to be displaced from the guide member and the supporting member on a reference plane of the chassis.

Abstract: A structure for supporting a rotating body has a cylindrical rotating member having a flange perpendicular to an axis and a cylindrical portion, and a fixed shaft for rotatably supporting the rotating member. The flange has a hole, and the shaft has at least one hook projecting from the hole for restricting an axial movement of the rotating member.

Abstract: A disc cartridge includes an upper lid and a lower lid for housing an optical disc or a magneto-optical disc between them. The disc cartridge also includes amechanism for making a gap between the upper lid and the lower lid varable. The mechanism increases a clearance between the surface of the disc housed in the disc cartridge and the inner surface of the upper and lower lids when the disc cartridge is inserted in an information recording and reproducing device. The mechanism may also increase a clearance between the outer rim of the disc and the inner wall of the disc cartridge when the disc cartridge is inserted in an information recording and reproducing device.

Abstract: An optical disk recording and/or reproducing apparatus records and/or reproduces information on an information record surface of an optical disk loaded thereto.

Abstract: A compact disc (CD) has a first centering hole having a first radius and has annular projection rings on both sides of the CD. The center of the ring is coaxial with the center of the first centering hole. A radius of an outer periphery of each of the projection rings is smaller than a second radius of a second centering hole of a video disc.

Abstract: An optical disk recording and/or reproducing apparatus records and/or reproduces information on an information record surface of an optical disk loaded thereto.

Abstract: A multi-disc storage player in which a plurality of discs can be stored and selected in the desired order for continuous programmable playing. In particular, the player includes a positioning device for relatively positioning a disc storage portion, which is capable of systematically storing a plurality of discs, and a disc playing device in the direction of arrangement of the discs; and a disc moving device for making a selected disc move between the disc storage portion and the playing device. The positioning device includes a movable member for carrying a selected one of the disc storage portion and the playing device, a driving mechanism for making the movable member move according to an instruction of movement, and a controlling device for issuing said instruction of movement to the driving mechanism until a designated position corresponding to a disc designated by an instruction of playing coincides with a current position of the movable member.