Disc drive

  • US 5,995,468 A
  • Filed: 07/18/1997
  • Issued: 11/30/1999
  • Est. Priority Date: 07/18/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A disc drive comprising:

  • a main body having a chassis;

    a mechanism unit having a turntable on which a disc is to be placed and a pick-up for playing back or playing back and recording the disc, said mechanism unit having a front portion and a rear portion wherein said rear portion of said mechanism unit is pivotally supported on said chassis such that said front portion is displaceable between a raised position in which the disc is supported on the turntable and a lowered position which is lower than the raised portion;

    a cam mechanism provided so as to be cooperatively associated with said mechanism unit, said cam mechanism adapted to be displaceable between a first position in which the mechanism unit is in the lowered position and a second position in which the mechanism unit is in the raised position wherein said cam mechanism is provided adjacent to the front portion of said mechanism unit through a predetermined space therebetween so as to be displaceable in a substantially horizontal direction orthogonal to the moving direction of said disc tray between said first and second positions and wherein said cam mechanism includes a plate-shaped member having at least one slanting cam which guides a cam pin provided on the front portion of said mechanism unit in an up and down direction in accordance with the displacement of the cam mechanism;

    a disc tray which is movable with respect to the main body between a disc loading position and a disc eject position, said disc tray having a first rack and a second rack which is continuous to the first rack; and

    a drive mechanism having an operative gear which is engaged with the racks of the disc tray, said drive mechanism carries out a first operation which moves said disc tray between the disc loading position and the disc eject position with said cam mechanism being held at said first position, when said operative gear is engaged with the first rack, and a second operation which displaces said cam mechanism between said first position and said second position when said operative gear is engaged with said second rack.

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