Apparatus for suppressing warping optical disk and optical disk apparatus
AssigneeFujitsu Limited
InventorsEiji Yabuki, Tadashi Sato
Life of this patent
Estimating the term…
Abstract
An apparatus for suppressing warping of a rotating optical disk including a disk warp suppressing member facing a surface of the upturned side of the optical disk in a manner to be in sliding contact with the optical disk, and an elastic member for supporting the disk warp suppressing member and forcing it toward the optical disk. The apparatus also has a carriage which faces a rotation region of the optical disk so as to move freely in the radial direction of the optical disk, and is provided with light beam irradiating means, with the elastic member being fitted to the carriage.
Claims15
An apparatus for suppressing warping of an optical disk which is driven in rotation, comprising:
- a first disk warp suppressing member positioned to face a surface of the optical disk, said first warp suppressing member being configured and arranged to either slidably contact the optical disk surface during rotation of the optical disk or to float a slight distance away from the optical disk surface during rotation of the optical disk;
- and
- a first elastic member for supporting said first disk warp suppressing member and for biasing said first disk warp suppressing member toward the optical disk, wherein said first elastic member has a long plate form, and has at an end of its longitudinal direction said first disk warp suppressing member.
An optical disk apparatus wherein information can be recorded and/or reproduced, the apparatus comprising
- means for rotating an optical disk;
- means for irradiating a light beam to said optical disk;
- and
- a disk warp suppressing apparatus which includes:
- a first disk warp suppressing member positioned to face a surface of the optical disk, said first warp suppressing member being configured and arranged to either slidably contact the optical disk surface during rotation of the optical disk or to float a slight distance away from the optical disk surface during rotation of the optical disk;
- and
- a first elastic member for supporting said first disk warp suppressing member and for biasing said first disk warp suppressing member toward the optical disk, wherein said first elastic member has a long plate form, and also has at an end of its longitudinal direction said first disk warp suppressing member.
An optical disk apparatus wherein information can be recorded and/or reproduced, the apparatus comprising
- means for rotating an optical disk;
- means for irradiating a light beam to said optical disk;
- and
- a disk warp suppressing apparatus which includes:
- a first disk warp suppressing member positioned to face a surface of the optical disk, said first warp suppressing member being configured and arranged to float a slight distance away from the optical disk surface during rotation of the optical disk;
- a first elastic member for supporting said first disk warp suppressing member and for biasing said first disk warp suppressing member toward the optical disk;
- a second disk warp suppressing member disposed on a side of the optical disk opposite to the side on which said first disk warp suppressing member is disposed, said second warp suppressing member being configured and arranged to float a slight distance away from the optical disk surface during rotation of the optical disk;
- and
- a second elastic member for supporting said second disk warp suppressing member and for biasing said second disk warp suppressing member toward the optical disk,
- whereby said first disk warp suppressing member is substantially maintained at a relatively constant floating distance, with respect to the optical disk, when an approximate equilibrium is reached between a biasing force created by said first elastic member and an air current force generated when the optical disk is rotated and said second disk warp suppressing member is substantially maintained at a relatively constant floating distance, with respect to the optical disk, when an approximate equilibrium is reached between a biasing force created by said second elastic member and an air current force generated when the optical disk is rotated.
An apparatus for suppressing warping of a magneto-optical disk which is driven in rotation, comprising:
- a first disk warp suppressing member positioned to face a side of the magneto-optical disk opposite to a magnetization means where a magnetic head is attached, said first disk warp suppressing member being configured and arranged to either slidably contact the magneto-optical disk during rotation of the magneto-optical disk or to float a slight distance away from the magneto-optical disk during rotation of the magneto-optical disk;
- and
- a first elastic member for supporting said first disk warp suppressing member and for biasing said first disk warp suppressing member toward the magneto-optical disk, wherein said first elastic member has a long plate form, and also has at an end of its longitudinal direction said first disk warp suppressing member.
Dependencies are inferred from the claim text.