Abstract: This invention provides a disc driving device used for rotationally driving a disc-shaped recording medium, comprising: a motor (3) in which a rotary shaft (2) attached to a rotor housed in a case (1) is provided to protrude from the case; and a turntable (4) having a setting portion (4d) for setting a disc (201) thereon and a cylindrical portion (4a) provided to protrude inward, and mounted on the proximal end side of the rotary shaft (2) so as to cover the proximal end side of the rotary shaft (2) by the cylindrical portion (4a).

Abstract: This device has an optical pickup section, a first rack portion provided on the optical pickup section, a slide member having an opening/closing portion for opening/closing a facing surface of the objective lens to the optical disc and a second rack portion provided to be slidable on the first rack portion, and a driving mechanism having a driving gear which meshes with the first rack portion and the second rack portion. In this device, when the optical pickup section is moved to a predetermined position, the meshing state of the first rack portion with the driving gear is canceled and the second rack portion is driven by the driving gear to move the slide member, thereby moving the opening/closing portion from a position for opening the facing surface side of the objective lens to a position for closing the facing surface side.

Abstract: This invention provides a disc driving device used for rotationally driving a disc-shaped recording medium, comprising: a motor (3) in which a rotary shaft (2) attached to a rotor housed in a case (1) is provided to protrude from the case; and a turntable (4) having a setting portion (4d) for setting a disc (201) thereon and a cylindrical portion (4a) provided to protrude inward, and mounted on the proximal end side of the rotary shaft (2) so as to cover the proximal end side of the rotary shaft (2) by the cylindrical portion (4a).

Abstract: An adjustment method for optical pick-up including a light source for emitting light beams, an object lens for irradiating light beams onto an optical disc for adjustment and a drive portion for driving the object lens in a direction in parallel to the optical axis of the object lens and in a direction perpendicular to the optical axis thereof, wherein in the state where the light source is movably held with respect to the object lens and the drive portion is movably held with respect to the light source, light beams are irradiated onto an optical disc for adjustment concentrically having recording tracks from the optical pick-up to adjust relative position of the object lens with respect to the light source and inclination of the optical axis of the object lens, and an optical disc for adjustment used in such an adjustment method.

Abstract: An optical pickup device for recording and/or reproducing the information on or from an optical disc.

Abstract: An objective lens driving apparatus having a lens holder, elastic supports, and a drive unit. The lens holds an objective lens. The elastic supports are secured at one end to the lens holder and at the other end to a fixed section, thereby allowing the lens holder to move. The drive unit drives the lens holder in a direction parallel to an optical axis of the objective lens and in a plane perpendicular to the direction parallel to the optical axis. The drive unit has at least two magnets provided on the lens holder, a coil section secured to the fixed section, and a yoke. The yoke constitutes, a closed magnetic circuit, along with the magnets. In the drive unit, said at least two magnets are arranged, opposing each other, the coil section is located in a gap between said at least two magnets, and a center of the gap is aligned with a center of the coil section.

Abstract: A loading apparatus for a disc, in which a transporting member carrying a disc is moved across the inside and the outside of a main body portion of the apparatus for transporting the disc between a disc exchanging position protruded from the main body portion, a disc housing position, within the main body portion and a recording and/or reproducing position includes a plurality of transporting members arranged in a stacked state in a main body portion of the apparatus and adapted for movement between a position protruded from the main body portion and a position within the main body portion. Each of the transporting members carries a recording medium.

Abstract: A disc loading device including a disc stocker containing a plurality of the cartridge holders housed and held within the disc stocker in tiers. Each cartridge holder holds a disc cartridge that includes a recording disc housed within a cartridge main member. A chassis is movably supported adjacent the disc stocker. A recording and/or reproducing unit, for recording/reproducing information signals on or from the recording disc, is movably mounted to the chassis. A transport device transports one of the cartridge holders from a first position in the disc stocker in a direction towards the recording and/or reproducing unit to a second position adjacent the recording and/or reproducing unit.

Abstract: A recording and/or reproducing device that includes a disc stocker for holding a plurality of disc cartridges in tiers so that each disc cartridge is partially exposed to outside. A transport device selects one of the disc cartridges held by the disc stocker and transports the selected disc cartridge to a recording and/or reproducing unit. The transport device thrusts toward the inside of the disc stocker to initiate the operation of selecting one of the disc cartridges and transporting the selected disc cartridge to the recording and/or reproducing unit. The transport device includes a movably supported movement member and an endless driving belt having a portion lying along a path of movement of the movement member. The endless belt is placed around and fed by a driving pulley member. A follower pulley member is arranged on the movement member and carries the endless driving belt placed therearound.

Abstract: A disc cartridge holding device is disclosed for use in a recording and/or reproducing apparatus. The recording and/or reproducing apparatus includes a disc stocker containing a plurality of cartridge holders housed and held within the disc stocker in tiers. Each cartridge holder holds a disc cartridge that includes a recording disc housed within a cartridge main member, and a movable shutter for covering a recording/reproducing aperture through the main member. Each disc cartridge is loaded into a holder such that its shutter remains closed when not in use. A chassis is movably supported adjacent the disc stocker. A recording and/or reproducing unit, for recording/reproducing information signals on or from the recording disc, is movably mounted to the chassis. A transport device transports one of the cartridge holders from the disc stocker to the recording and/or reproducing unit for recording/reproduction thereon/therefrom.

Abstract: A recording and/or reproducing apparatus, for disc cartridges within which optical discs are respectively accommodated, having a recording and/or reproduction unit for carrying out recording and/or reproduction of information signals with respect to the optical discs, an accommodating body that accommodates plural disc cartridges therewithin and has opening portions formed at plane surfaces opposite to each other, a taking-out mechanism for selectively taking out disc cartridges from the accommodating body, a carrying mechanism for loading the cartridge taken out by the taking-out mechanism into the recording and/or reproduction unit, and a vertical movement mechanism for vertically moving the accommodating body relative to the taking-out mechanism.

Abstract: A lift stage that may be moved vertically by being guided by a longitudinal groove in a lateral wall is uplifted or lowered via a pin by first and second cams. The first cam has a zigzag-shaped cam groove to permit periodic reciprocating movement. The second cam performs a reciprocating movement with a pre-set phase difference with respect to the first cam. When the pin reaches a branching point of the zig-zag shaped cam groove, the uplifting or the descent is selected in dependence upon the direction of rotation of a rotary cam causing rotation of the respective cams, with the second cam supporting or not supporting the pin. There is provided a system which is small-sized, simple in construction and superior in load bearing capability and durability and which is suited for use in a recording and/or reproducing apparatus.

Abstract: A disc loading apparatus for delivery of a disc between a disc container and a disc carrier. The disc loading apparatus comprises a drive roller mounted rotatably on the disc carrier. The drive roller has a peripheral surface for contact with the peripheral surface of the disc. The disc carrier has a semicircular guide member secured thereon at a position concentric with the drive roller to define a disc delivery path along with the drive roller. The semicircular guide member has an inner peripheral surface facing to the peripheral surface of the drive roller for contact with the peripheral surface of the disc. The disc carrier also has a disc knocker mechanism provided thereon for knocking the peripheral surface of the disc to push the disc out of the disc container into the disc delivery path. The drive roller is rotated to advance the disc in the disc delivery path with the disc revolving around the drive roller.

Abstract: A disc chucking apparatus for use in an automatic disc changer for a disc player includes an arm base 28 which is vertically movable and reversible with respect to a chassis 1, and a disc base 34 fixedly mounted on the arm member. The disc base 34 has a central insert member 34a for being inserted in the central hole of a disc and a disc support surface 34b for abutting engagement with a peripheral edge of the central hole of the disc. A rod 35 extends axially slidably through the central insert member 34a, and a pantographic link mechanism 38 is operatively coupled between the disc base 34 and an end of the rod 35, and collapsible and extensible in response to sliding movement of the rod 35. When the arm base 28 is vertically moved in response to sliding movement of the rod 35, with the presser assembly 38 extended, the central insert member 34a and the presser assembly 38 are inserted into the central hole of the disc.

Abstract: A mode changing apparatus for a tape recorder comprises a rotatable changing gear having a toothed periphery with a toothless gap therein, a magnet rotatably coupled with the changing gear for rotation therewith, a driving gear rotatably mounted for engagement with the toothed periphery of the changing gear, a yoke assembly including a portion cooperating with the magnet for providing a stabilizing effect by which the changing gear is held in an initial position with the toothless gap facing the driving gear, a solenoid coil wound on another portion of the yoke assembly and being operative, when energized, to generate a magnetic force by which the magnet and changing gear are angularly displaced from the initial position for engagement of the toothed periphery by the driving gear to cause turning of the changing gear, an operating member, such as a head base plate of the tape recorder, movable from an inactive position to an active position for establishing a respective mode of the tape recorder and being yie

Abstract: A feather-touch mode changer having low power requirements and being capable of selectively providing a plurality of modes of operation of a tape recording/reproducing apparatus, has two changing mechanisms which are each of the type that includes a rotatable changing gear with a toothless gap, a selectively actuable trigger for causing initial angular displacement of the changing gear from an inactive position in which the toothless gap faces a drive gear to an actuating position in which the changing gear engages the drive gear, and an actuating lever that moves in a response to the rotation of the changing gear by the drive gear. The two changing mechanisms are selectively actuable, and a single drive gear is positioned for engagement with both changing gears. Each of the two changing mechanisms has associated with it a selectively energizable electromagnetic device and a locking lever that moves into a locking position in response to movement of the respective actuating lever.

Abstract: Apparatus for cancelling undesired signals for a radient energy receiver having first and second antennas which are spaced a distance apart and including a phase compensation circuit connected to one of the antennas and a variable phase shift circuit connected to the second antenna with the variable phase shift circuit comprising a plurality of series connected inductors wherein adjacent inductors are magnetically coupled together and a plurality of voltage variable capacitors with adjacent ones of the voltage variable capacitors connected between ground and the junction points between adjacent ones of the series connected inductors and adding means connected to the outputs of the phase compensation circuit and the variable phase shift circuit and means for supplying a variable DC voltage to the variable voltage capacitors to control their capacitance.