Abstract: An output of an optical sensor in the initial state, that is, when a disc is absent, is set as a reference value. A threshold for detecting the disc is calculated by adding a predetermined variation to the reference value. When the output of the optical sensor exceeds the threshold, it is determined that the disc is present.

Abstract: A medium detecting device determines whether a medium is set in a device. The medium detecting device includes an optical sensor irradiates a light towards a position where the medium is possibly set, collects a reflected light, and outputs a signal based on the reflected light. A temperature sensor measures temperature around the optical sensor. A threshold selecting unit selects a threshold from among a plurality of thresholds based on the parameter. A determining unit determines whether the medium is set based on comparison of the signal and the threshold selected.

Abstract: A disk inserting/ejecting apparatus includes: a disk carrying device which carries a disk between an insertion/ejection slot to/from which a disk is inserted/ejected and a disk driving position; right and left detection levers which come into contact with the disk and move at the time of carrying the disk; and a mounting plate in which notches are formed, the notches positioning so that the positions of the right and left detection levers before the disk comes into contact with the right and left detection levers and the positions of the right and left detection levers after contact between the disk and the right and left detection levers is cancelled are different from each other.

Abstract: A playback mechanism of a recording medium is provided, by which a period of time required until information recorded in the recording medium is read out after the recording medium is inserted in an instrument body can be shortened and the size of the playback mechanism can be reduced. The mechanism includes an instrument body, conveying unit having a roller arm and disc guide, clamp playback unit having a locking pin, and locking member. The clamp playback unit is movable relatively to the instrument body. The locking member locks the locking pin to fix the clamp playback unit. The locking member releases the locking of the locking pin to make the clamp playback unit movable relatively to the instrument body. When the clamp playback unit clamps a CD, the roller arm and disc guide part from the CD, thereby the locking by the locking member is gradually released.

Abstract: A disc reproducing apparatus comprises a disc holder for receiving a plurality of discs; a disc reproducing section including a turntable for mounting a disc, an optical pickup for reproducing information recorded on the disc, a pickup moving mechanism for moving the optical pickup in the radial direction of the disc; a reproducing section pivoting means for pivoting the reproducing section between a reproducing position and a non-reproducing position; and a disc transporting means for transporting a disc inserted from the outside to the disc holder. In particular, the disc reproducing section includes a position detecting means for detecting a position of the optical pickup in the reproducing apparatus. Further, when the disc reproducing section is in its non-reproducing position, the position detecting means is adapted to detect the position of a disc which has been transported from the outside into the apparatus.

Abstract: An urging structure for an output shaft of a drive motor of the invention is configured by a pressing plate 31 which abuts against an end face 24a of an output shaft 24, and an urging spring 36 which urges the pressing plate in the axial direction of the output shaft 24. In the pressing plate 31, a fixing portion 32 in one end is fixed onto a chassis 21 in the vicinity of the output shaft 24, and an abutting portion 34 is disposed on the tip end of a flexible arm portion 33. A spring holding portion 35 with which an end portion of the urging spring 36 that is fixed to a spring boss 37 is to be engaged is disposed on the rear face of the abutting portion 34.

Abstract: A disc storage is provided for storing a plurality of trays, each for holding a disc. The trays are stacked in the storage. A movable member is provided to be moved in the vertical direction. A disc player, a tray moving device are mounted on the movable member. The tray moving device is provided to be engaged with trays for moving the trays and for increasing a space between a desired tray and an adjacent disc for receiving disc player, and for decreasing the space during the reproduction of the desired disc.

Abstract: A playback mechanism of a recording medium is provided, by which a period of time required until information recorded in the recording medium is read out after the recording medium is inserted in an instrument body can be shortened and the size of the playback mechanism can be reduced. The mechanism includes an instrument body, conveying unit having a roller arm and disc guide, clamp playback unit having a locking pin, and locking member. The clamp playback unit is movable relatively to the instrument body. The locking member locks the locking pin to fix the clamp playback unit. The locking member releases the locking of the locking pin to make the clamp playback unit movable relatively to the instrument body. When the clamp playback unit clamps a CD, the roller arm and disc guide part from the CD, thereby the locking by the locking member is gradually released.

Abstract: A disc storage stores a plurality of discs. A pair of driving rollers are provided for carrying a disc inserted from an opening to the disc storage. Each of the driving rollers is provided to be moved between a disc carrying position and a retracted position by a moving device.

Abstract: A positional displacement compensating mechanism and a recording medium playback device which can compensate a positional displacement between two members to be movable freely mutually are provided. A recording medium playback device has a clamping playback unit 5. The clamping playback unit 5 has a carriage chassis 45, a clamping arm 46, a positioning member 61, a CD sensing member 62 and a torsion spring 63. The carriage chassis 45 and the clamping arm 46 can move freely close or apart mutually. The positioning member 61 is located between the carriage chassis 45 and the clamping arm 46. The CD sensing member 62 is supported to move one end 62a rotatably by the clamping arm 46. The other end 62b of the CD sensing member 62 is engaged with the positioning member 61. The CD sensing member 62 has a supporting portion 69.

Abstract: A disc reproducing apparatus comprises a disc holder for receiving a plurality of discs, a disc transporting device for transporting a disc inserted from outside into the disc holder, and a disc reproducing device for reproducing a disc selected from the plurality of discs received in the disc holder. The disc holder includes a plurality of trays each for mounting one disc, guide devices allowing the trays to move only in trays arranging direction, a fixed bottom plate for supporting the plurality of trays, a movable top plate movable in the tray arranging direction by virtue of the guide devices. Further, the movable top plate is urged towards the fixed bottom plate by virtue of an urging device.

Abstract: A disc reproducing apparatus comprises a disc holder for receiving a plurality of discs; a disc reproducing section including a turntable for mounting a disc, an optical pickup for reproducing information recorded on the disc, a pickup moving mechanism for moving the optical pickup in the radial direction of the disc; a reproducing section pivoting means for pivoting the reproducing section between a reproducing position and a non-reproducing Position; and a disc transporting means for transporting a disc inserted from the outside to the disc holder. In particular, the disc reproducing section includes a position detecting means for detecting a position of the optical pickup in the reproducing apparatus. Further, when the disc reproducing section is in its non-reproducing position, the position detecting means is adapted to detect the position of a disc which has been transported from the outside into the apparatus.

Abstract: A disc reproducing apparatus comprises a disc holder for receiving a plurality of discs; a disc reproducing section including a turntable for mounting a disc, an optical pickup for reproducing information recorded on the disc, a pickup moving mechanism for moving the optical pickup in the radial direction of the disc; a reproducing section pivoting means for pivoting the reproducing section between a reproducing position and a non-reproducing position; and a disc transporting means for transporting a disc inserted from the outside to the disc holder. In particular, the disc reproducing section includes a position detecting means for detecting a position of the optical pickup in the reproducing apparatus. Further, when the disc reproducing section is in its non-reproducing position, the position detecting means is adapted to detect the position of a disc which has been transported from the outside into the apparatus.

Abstract: A supporting mechanism is provided to be moved between a disc insertion opening and a disc storing device, and a driving roller is rotatably mounted on the supporting mechanism for carrying a disc inserted in the opening toward the disc storing device. The supporting mechanism is moved between the opening and the disc storing device, and the driving roller is driven for carrying the disc from the opening to the disc storing device.

Abstract: A disc storage is provided for storing a plurality of trays, each for holding a disc. The trays are stacked in the storage. A movable member is provided to be moved in the vertical direction. A disc player, a tray moving device are mounted on the movable member. The tray moving device is provided to be engaged with trays for moving the trays and for forming spaces between trays for receiving disc player. A driving device is provided for vertically moving the movable member.

Abstract: A disc storage is provided for storing a plurality of trays, each for holding a disc. The trays are stacked in the storage. A movable member is provided to be moved in the vertical direction. A disc player, a tray moving device are mounted on the movable member. The tray moving device is provided to be engaged with trays for moving the trays and for forming spaces between trays for receiving disc player. A driving device is provided for vertically moving the movable member.

Abstract: A supporting means is provided to be moved between a disc insertion opening and a disc storing device, and a driving roller is rotatably mounted on the supporting means for carrying a disc inserted in the opening toward the disc storing device. The supporting means is moved between the opening and the disc storing means, and the driving roller is driven for carrying the disc from the opening to the disc storing device.

Abstract: A disc storage stores a plurality of discs. A pair of driving rollers are provided for carrying a disc inserted from an opening to the disc storage. Each of the driving rollers is provided to be moved between a disc carrying position and a retracted position by a moving device.

Abstract: A plurality of trays, each for holding a disc, are arranged in a disc arranging direction in a disc storage. A movable base is provided to be rotated about a shaft and a disc player having a turntable, a disc clamper and a pickup, is mounted on the movable base. A driving device is provided for rotating the movable base between a retracted position and a disc reproducing position. A lock device is provided on the chassis for engaging with the movable base at the disc reproducing position to minimize external vibrations to the movable base during disc reproduction.

Abstract: A resin composition for plating comprising a thermoplastic resin and aluminum borate or amorphous silica, or both as an inorganic filler. The resin compositionexhibits excellent plating characteristics and excellent electrical characteristics.