Disc drive and optical disc drive

An optical disc drive for recording data on and/or reproducing data from an optical disc, comprising:

• a base made of a single flat metal plate that is rectangular in shape;
• disc rotation driving means disposed on the base for rotating an optical disc loaded in the base;
• an optical pickup disposed on the base adapted to record data on and/or reproduce data from the optical disk;
• guide means disposed on the base for movably supporting the optical pickup between inner and outer circumferences of the optical disc, while the optical disc is rotated;
• a feeding mechanism disposed on the base adapted to feed the optical pickup along the guide means;
• a plurality of supporting means each with an associated elastic member adapted to elastically support the base and an adjusting piece adapted to adjust an elasticity of the elastic member, the supporting means being disposed symmetrically on the base with respect to a center line of the base along the direction of the movement of the optical pickup, wherein at least one of the supporting means has a first supporting elasticity and is disposed on the base near the disc rotation driving means, while at least another one of the supporting means has a second supporting elasticity different from the first supporting elasticity and is disposed on the base away from the disc rotation driving means;
• four receiving portions disposed on four corners of the base for receiving the supporting means,
• wherein the disc rotation driving means, the optical pickup, and the feeding mechanism are located on the base such that a center of gravity of the base lies along the center line.

An optical disc drive for recording data on and/or reproducing data from an optical disc, comprising:

• a support pedestal;
• a base made of a single flat metal plate that is rectangular in shape and has four receiving portions on four corners supported by the support pedestal;
• disc rotation driving means disposed on the base for rotating an optical disc loaded in the base;
• a disc tray movably disposed on the support pedestal between a first position where the optical disc is removable and a second position where the optical disc is at the disc rotation driving means;
• an optical pickup disposed on the base adapted to record data on and/or reproduce data from the optical disc;
• guide means disposed on the base for movably supporting the optical pickup between inner and outer circumferences of the optical disc, while the optical disc is rotated;
• a feeding mechanism disposed on the base adapted to feed the optical pickup along the guide means;
• and
• a base support member for supporting the base with a plurality of supporting means disposed symmetrically with respect to a center line of the base along the direction of the movement of the optical pickup and on the receiving portions of the base, each of the supporting means including an elastic member and an adjusting piece adapted to adjust an elasticity of the elastic member, wherein at least one of the supporting means has a first supporting elasticity and is disposed on the base near the disc rotation driving means, while at least another one of the supporting means has a second supporting elasticity different from the first supporting elasticity and is disposed on the base away from the disc rotation driving means,
• wherein the disc rotation driving means, the optical pickup, and the feeding mechanism are located on the base such that a center of gravity of the base lies along the center line.

An optical disc drive for accurately recording data on and/or reproducing data from an optical disc, comprising:

• a base made of a single flat metal plate that is rectangular in shape and has four receiving portions on four corners;
• disc rotation driving means disposed on the base for rotating an optical disc loaded in the base;
• an optical pickup disposed on the base adapted to record data on and/or reproduce data from the optical disc;
• guide means disposed on the base for movably supporting the optical pickup between inner and outer circumferences of the optical disc, while the optical disc is rotated;
• a feeding mechanism disposed on the base adapted to feed the optical pickup along the guide means;
• a plurality of supporting means disposed on the base with an associated elastic member adapted to elastically support the base and an adjusting piece adapted to adjust an elasticity of the elastic member, the supporting means being disposed symmetrically on the base with respect to a center line of the base along the direction of the movement of the optical pickup and on the receiving portions of the base, wherein at least one of the supporting means has a first supporting elasticity and is disposed on the base near the disc rotation driving means, while at least another one of the supporting means has a second supporting elasticity different from the first supporting elasticity and is disposed on the base away from the disc rotation driving means;
• whereby weight shifts or imbalances caused by optical pickup movement are eliminated such that the balance of the base is maintained along the direction of movement during operation of the optical disc drive.

An optical disc drive for recording data on and/or reproducing data from an optical disc, comprising:

• a base made of a single flat metal plate that is rectangular in shape and has four receiving portions on four corners;
• disc rotation driving means disposed on the base for rotating an optical disc loaded in the base;
• an optical pickup disposed on the base adapted to record data on and/or reproduce data from the optical disc;
• guide means disposed on the base for movably supporting the optical pickup between inner and outer circumferences of the optical disc, while the optical disc is rotated;
• a feeding mechanism disposed on the base adapted to feed the optical pickup along the guide means;
• and
• at least four supporting means each with an associated elastic member adapted to elastically support the base and an adjusting piece adapted to adjust an elasticity of the elastic member, the supporting means being disposed symmetrically on the base with respect to a center line of the base along the direction of the movement of the optical pickup and on the receiving portions of the base, wherein at least one of the supporting means has a first supporting elasticity and is disposed on the base near the disc rotation driving means, while at least another one of the supporting means has a second supporting elasticity different from the first supporting elasticity and is disposed on the base away from the disc rotation driving means,
• wherein the disc rotation driving means, the optical pickup, and the feeding mechanism are located on the base such that a center of gravity of the base lies along the center line.