Abstract: A disk cartridge includes a case which receives a disk thereon, a cover which is installed on the case and includes an opening, and a shutter which is movably installed in the case, in a lower direction of the disk, to open and close an aperture formed on the case. The disk cartridge has guide holes formed on the case along a trace of the shutter, and support members formed on the shutter. The support members are guided along the guide holes while having ends thereof interfering with peripherals of the guide holes. Therefore, since the peripherals of the guide holes interfere with the ends of the support members, the shutter is prevented from being deformed even where an external force is applied to the shutter through the aperture, in a closed state of the shutter.

Abstract: A disk player has a tray capable of moving in and out of a player body. A driving unit moves the tray. A lift unit selectively engages or disengages the driving unit and raises a turntable receiving a disk loaded by the tray thereon. A spindle motor rotates the turntable. A damping unit reduces loads and impacts during movement of the lift unit.

Abstract: A disc cartridge includes a shutter unit having an outer shutter and inner shutters to open and shut apertures on the disc cartridge. The outer shutter opens one of the inner shutters corresponding to a side of the disc cartridge being accessed by a pickup. Accordingly, the overall area of the apertures exposed to the exterior during information recording and reproducing operations is reduced. Accordingly, dust is less likely to enter into the disc cartridge.

Abstract: A disk drive including a tray on which a disk cartridge is mounted and is loaded into and unloaded from a main body; a guide formed on the tray; and an opening and closing member installed to be elastically connected to the guide. The opening and closing member has a second gear that rotates a rotating wheel by meshing with a first gear; and a first protrusion formed on one end of a second gear and to temporarily rotate the rotating wheel so that the first and second gears can mesh. The guide pushes the first protrusion during loading/unloading of the tray so that the first protrusion and the latch do not come in contact with each other.

Abstract: An optical disk player with improved opening and closing of a door, transport of a tray, and an improved pivoting structure of a chassis to pivot a turntable. The optical disk player includes: a body; a tray to move in and out of the body so as to transport an optical disk; a chassis installed to pivot inside the body; an optical pickup, which is installed to be able to move back and forth in the chassis, to record/reproduce information onto/from the optical disk that is rotatably placed on the turntable; a cover installed on a front of the body, the cover including: a door holder with an aperture through which the tray moves; a door to be able to slide along the door holder so as to open and close the aperture; and a cam driving device to activate the tray, to pivot the chassis, and to open and close the door by sliding.

Abstract: A disc clamping apparatus includes an upper clamper holder, a lower clamper holder which is combined with the upper clamper holder, a clamper which is movably installed between the upper clamper holder and the lower clamper holder and clamps a disc that is disposed on a turntable, a first magnetic member installed between the upper clamper holder and the lower clamper holder, a second magnetic member installed on the turntable to face the first magnetic member so that a magnetic force operates between the first magnetic member and the second magnetic member to clamp the disc and an elastic member disposed between the upper clamper holder and the clamper so as to provide an elastic force to push the clamper against the disc. The disc clamping apparatus clamps discs having various thicknesses. Also, a clamping force of the disc clamping apparatus is changed in proportion to the thickness of the disc, and thus a proper clamping force can be applied to the disc based on the thickness of the disc.

Abstract: A disk drive including a tray and an opener. The tray includes a disk cartridge mounted thereon and is loaded into and unloaded from a main body. The opener is installed in the main body and elastically contacts a guide formed on the tray. The opener includes a second gear and a first protrusion. The second gear rotates a rotating wheel when in contact with a first gear. The first protrusion formed on a first end of the second gear temporarily rotates the rotating wheel so that the first and second gears can mesh. The guide has a first cam that moves the opener such that the first protrusion does not interfere with the latch when the tray is loaded/unloaded.

Abstract: A disc cartridge includes a case accommodating a disc and guided by both sidewalls of a holder when inserted in a holder of a disc drive apparatus. The case includes flat surface portions formed to have surface contact with both sidewalls of the holder, and curved surface portions connecting the flat surface portions. Thus, since corner portions of the case of the disc cartridge have round shapes, such as the curved surface portions, a compact-sized disc cartridge can be manufactured. Also, since the disc cartridge has surface contact with an inner wall of the holder when the disc cartridge enters the holder of the disc drive apparatus, a loading work can be stably and accurately performed.

Abstract: A disc cartridge includes a case accommodating a disc and having an aperture hole formed on a first surface of the case so that a recording/reproducing apparatus access a recording surface of the disc, and an open hole formed on a second surface to be open to an outside of the case, a shutter opening/shutting the aperture hole and installed in the case, a disc holder installed at a side defining the open hole to move up and down and covering a gap between an outer circumference of the disc and an inner surface of the side defining the open hole when the disc holder descends, and a shutter driving mechanism moving the shutter so that the aperture hole is open/shut. Thus, a passage through which dust is introduced toward an information area of the disc, and a gap formed at an outer circumference are blocked by the disc holder so that a possibility of contamination by dust can be reduced.

Abstract: A disk cartridge includes a lower case having an opening formed thereon, an upper case installed at the lower case to be capable of being open and shut while pivoting, to accommodate a disk therebetween, a shutter installed at the lower case to be capable of sliding and opening and shutting the opening hole, a close covering member having an inclined surface installed at the shutter to be capable of sliding, closely contacting a non-information area disposed at an inner circumference of the disk when the shutter is closed, and being separated from the non-information area disposed at the inner circumference of the disk when the shutter is open. Thus, when the shutter is closed, introduction of dust is prevented so that the possibility of the information area of the disk being contaminated is lowered. Also, since the disk is fixed between the upper and lower cases, while the disk is carried, noise and damage can be reduced.

Abstract: A disk cartridge includes a case accommodating a disk, a cover installed at the case to be capable of being open and shut and having a hole formed thereon to be open to an outside of the cover, a shutter installed under the disk in the case to be capable of moving to open and shut an opening formed on the case, and a clamping member installed at the cover to seal the hole to clamp the disk. Thus, since the clamping member blocks the hole of the cover connected to the outside of the cover, possibility of intrusion of dust into the disk cartridge is reduced. Also, since there is no need to install the clamping member at the disk drive, the disk drive can be made simplified and slim.

Abstract: A disk cartridge includes a case which receives a disk thereon, a cover which is installed on the case and includes an opening, and a shutter which is movably installed in the case, in a lower direction of the disk, to open and close an aperture formed on the case. The disk cartridge has guide holes formed on the case along a trace of the shutter, and support members formed on the shutter. The support members are guided along the guide holes while having ends thereof interfering with peripherals of the guide holes. Therefore, since the peripherals of the guide holes interfere with the ends of the support members, the shutter is prevented from being deformed even where an external force is applied to the shutter through the aperture, in a closed state of the shutter.

Abstract: A disk cartridge includes a case accommodating a disk and having a first hole, a cover installed at the case and having a second hole open to an outside of the cover, a shutter installed to be capable of moving with respect to the case disposed under the disk to open/shut the first hole formed on the case, and a plurality of protruding portions provided at the shutter to support a non information area provided at an outer circumferential side of the disk and having inclined surfaces inclined at a predetermined angle. When the shutter is opened, the disk descends along the inclined surfaces. When the shutter is shut, the disk ascends along the inclined surfaces to closely contact a portion of the cover disposed around the second hole of the cover. Thus, since the shutter contacts only a non-information area of the disk, an information area of the disk can be safely kept from being damaged during an operation of opening/shutting the first hole.

Abstract: A disk cartridge includes a case to accommodate a disk, and a shutter installed in the case to move under the disk, and to selectively open/shut an opening hole formed in the case. The disk cartridge includes a support portion to protrude from the shutter to support a non-information area of the disk. Thus, since the shutter contacts only the non-information area of the disk, the information area of the disk is protected during an operation of the shutter to open and shut the opening hole.

Abstract: A disc clamping apparatus includes an upper clamper holder, a lower clamper holder which is combined with the upper clamper holder, a clamper which is movably installed between the upper clamper holder and the lower clamper holder and clamps a disc that is disposed on a turntable, a first magnetic member installed between the upper clamper holder and the lower clamper holder, a second magnetic member installed on the turntable to face the first magnetic member so that a magnetic force operates between the first magnetic member and the second magnetic member to clamp the disc and an elastic member disposed between the upper clamper holder and the clamper so as to provide an elastic force to push the clamper against the disc. The disc clamping apparatus clamps discs having various thicknesses. Also, a clamping force of the disc clamping apparatus is changed in proportion to the thickness of the disc, and thus a proper clamping force can be applied to the disc based on the thickness of the disc.

Abstract: An optical scanning apparatus for performing scanning by focusing a beam scattered by a bubble which moves at a predetermined speed within a closed loop fluid pipe, thereby forming an image. The optical scanning apparatus includes a light source for emitting light; a closed loop fluid pipe; a fluid contained in the fluid pipe, transmitting the light emitted from the light source; at least one bubble contained in the fluid pipe, scattering incident light; a pump installed at one side of the fluid pipe, circulating the bubble at a predetermined speed; and an image formation lens focusing the light emitted by the light source and scattered by the at least one bubble to form an image on a predetermined scanning line. Accordingly, the volume of the optical scanning apparatus can be reduced, and the optical scanning apparatus can be easily manufactured. Consequently, productivity can be increased.

Abstract: A disc cartridge includes a shutter unit having an outer shutter and inner shutters to open and shut apertures on the disc cartridge. The outer shutter opens one of the inner shutters corresponding to a side of the disc cartridge being accessed by a pickup. Accordingly, the overall area of the apertures exposed to the exterior during information recording and reproducing operations is reduced. Accordingly, dust is less likely to enter into the disc cartridge.

Abstract: An optical scanning apparatus which is improved in color registration by reducing bow of a scan line which is formed on a photosensitive medium. A plate having a slit with a width appropriate for a spot size of a scan line and a length corresponding to a predetermined scanning length is interposed between the photosensitive medium and a spot forming apparatus. A light source emits a laser beam, a rotary polygonal mirror reflects light from the light source while being rotated, f-&thgr; lenses cause the light reflected from the rotary polygonal mirror to form a proper spot, and a reflecting mirror disposed on an optical path between the f-&thgr; lenses and the photosensitive medium directs the spot toward the photosensitive medium. The slit plate passes a portion of the spot to uniformly form the scan line.

Abstract: An optical scanning apparatus for performing scanning by focusing a beam scattered by a bubble which moves at a predetermined speed within a closed loop fluid pipe, thereby forming an image. The optical scanning apparatus includes a light source for emitting light; a closed loop fluid pipe; a fluid contained in the fluid pipe, transmitting the light emitted from the light source; at least one bubble contained in the fluid pipe, scattering incident light; a pump installed at one side of the fluid pipe, circulating the bubble at a predetermined speed; and an image formation lens focusing the light emitted by the light source and scattered by the at least one bubble to form an image on a predetermined scanning line. Accordingly, the volume of the optical scanning apparatus can be reduced, and the optical scanning apparatus can be easily manufactured. Consequently, productivity can be increased.

Abstract: A beam scanning system including: a light source; a deflection disc rotatably installed over the light sources and having a hologram pattern on each of the upper and lower surfaces thereof, for diffracting beams emitted from the light source; and a plurality of mirrors for reflecting beams that have been diffracted by the deflection disc, to change the diffracted paths of the beams. Each of the upper and lower hologram patterns is formed with a low density relative to a one-sided hologram pattern.