Abstract: A detection hole 34 is provided in a tray 30, on which a cartridge type recording medium is mounted and housed, at a position corresponding to an information hole of a cartridge, a detection lever 35 is provided on a back surface of the tray 30 on the lower surface side of the detection hole 34, and a switch section 111 is provided on a frame 10 on the lower surface side of the detection lever 35 while the tray 30 is housed within the frame 10. Accordingly, the switch section 111 can be separated from the motion of a base since the switch section 111 is fixed to the frame 10, and consequently, the structure can be simplified and the space efficiency can be enhanced.

Abstract: A stopper 60 is provided which detects a projected part formed on an upper cartridge case of a shield type cartridge so as to prevent the shield type cartridge from being inserted. Accordingly, mechanical lock caused by the insertion of the shield type cartridge can be prevented.

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 stopper 60 is provided which detects a projected part formed on an upper cartridge case of a shield type cartridge so as to prevent the shield type cartridge from being inserted. Accordingly, mechanical lock caused by the insertion of the shield type cartridge can be prevented.

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 detection hole 34 is provided in a tray 30, on which a cartridge type recording medium is mounted and housed, at a position corresponding to an information hole of a cartridge, a detection lever 35 is provided on a back surface of the tray 30 on the lower surface side of the detection hole 34, and a switch section 111 is provided on a frame 10 on the lower surface side of the detection lever 35 while the tray 30 is housed within the frame 10. Accordingly, the switch section 111 can be separated from the motion of a base since the switch section 111 is fixed to the frame 10, and consequently, the structure can be simplified and the space efficiency can be enhanced.

Abstract: There is provided a shutter opening/closing apparatus which automatically performs shutter opening or closing in accordance with an insertion of a cartridge and does not give an influence, such as abnormal noise or backlash, to loading and unloading of a cartridge. The shutter opening/closing apparatus includes a follower member 18 configured to be engaged, at an opening 11 of the cartridge 10, with a portion of a drive member 13 driven in the cartridge 10 for opening or closing a shutter 15 provided for the cartridge, and a cam mechanism 7, 7a limiting a movement of the follower member 18 so as to avoid contact of the follower member 18 to the opening 11 of the cartidge 10 at a time when the engagement between the follower member 18 and the portion of the drive member 13 is released.

Abstract: A pick-up holder includes a holder component (72) for holding a pick-up (71) for recording and/or reproducing data on or from a recording medium, a shaft (74) for guiding slidably the holder component (72), a skew screw (80) and a guide wall (27) for engaging with the end of the shaft (74), and a torsion bar (82) for biasing the shaft (74) to the side of the skew screw (80) and the guide wall (27), in which the torsion bar (82) biases the shaft (74) in the direction intersecting with the direction that the shaft abuts against respectively the skew screw (80) and the guide wall (27). This arrangement allows the shaft (74) to be biased both in the vertical and lateral directions and to prevent backlashes in the vertical and lateral directions. Accordingly, it is possible to securely fix the shaft (74) and to improve ease of assembly with a simple construction.

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