Abstract: A motor includes a shaft, a shell, a sleeve, an abrasion-resistance piece, a bearing, an oil seal, and several compressed springs. The shaft has an axial line. The shell is connected to the shaft. The sleeve has an accommodating space, and the wall of the accommodating space forms a first inclined surface which is inclined at an angle with respect to the axial line. The abrasion-resistance piece is disposed at the bottom of the accommodating space. The bearing is disposed in the accommodating space, and the outer wall of the bearing forms a second inclined surface corresponding to the first inclined surface. The shaft passes through the bearing and abuts the abrasion-resistance piece. The oil seal is affixed to the wall of the accommodating space and covers the bearing. The compressed springs are connected between the oil seal and the bearing.

Abstract: A turn table for a spindle motor and a spindle motor having the turn table are provided, the turn table for a spindle motor according to an exemplary embodiment comprising a clamping plate configured to have a locking protrusion protruding from an inner surface of a first recess thereof, the first recess being concavely formed in an outer circumference of the clamping plate; and a turn-table body configured to have a second recess to receive the clamping plate, and a plurality of protrusions protruding from an inner surface defined by the second recess towards the first recess to lock the locking protrusion.

Abstract: An apparatus for rotating disc is provided, the apparatus according to an exemplary embodiment is characterized in that an anti-slip torque that is applied to the upper face of the disc by using the clamp unit and the elastic member is stronger than a rotation torque that is generated by the turn table to inhibit slipping of the optical disc from the turn table.

Abstract: A cylindrical member is fixed to an upper portion of a rotary shaft and a clamper presses an optical disc in contact with the top of a turntable. The structure is such that a first bottom face of the cylindrical member that faces a clamping magnet in the axial direction is positioned below an opposite face of the clamper that faces the clamping magnet in the axial direction.

Abstract: A spindle motor is disclosed, the spindle motor including a case including a lateral wall unit formed with a hollow hole, and a support unit extended to an inner side of a distal end of the lateral wall unit, a clamper arranged inside the lateral wall unit and supported by the support unit for clamping an upper surface of the optical disc, a cover plate covering the clamper, and an elastic member interposed between the clamper and the cover plate to apply a pressure to the clamper to a direction facing the upper surface of the optical disc.

Abstract: An apparatus for rotating a disc is disclosed, wherein the apparatus for rotating the disc includes a rotation shaft; a turn table coupled to the rotation shaft and having a felt that makes contact with a disc; a center guide member inserted into the rotation shaft and coupled to an inner face of the disc; a clamp magnet sucking a clamp unit that is faced with the turn table and makes contact with an upper face of the disc toward the felt; an elastic member interposed between the turn table and the center guide member and the elastic member elastically supporting the center guide member in an axial direction of the rotation shaft, wherein an anti-slip torque that is applied to the upper face of the disc by using the clamp unit and the elastic member is stronger than a rotation torque that is generated by the turn table to prevent slipping of the optical disc from the turn table.

Abstract: Disclosed is a turn table for a spindle motor, the turn table including a clamping plate having a locking protrusion protruding from an inner surface of a first recess that is concavely formed in an outer circumference of the clamping plate, and a turn-table body having a second recess to receive the clamping plate and having protrusions that protrude from an inner surface defined by the second recess towards the first recess to lock an upper surface and a side surface of the locking protrusion.

Abstract: A disclosed disk clamping mechanism includes a turntable fixed on a rotational shaft of a spindle motor to rotate a flexible thin optical disk, a stabilizer member configured to suppress a run-out of the flexible thin optical disk by an applying aerodynamic force to the rotating flexible thin optical disk so as to stabilize the run-out of the rotating flexible thin optical disk, and a clamper movably supported in a center of the stabilizer member in a direction perpendicular to a surface of the flexible thin optical disk. In the disclosed disk clamping mechanism, the flexible thin optical disk is sandwiched between the turntable and the clamper such that the turntable and the clamper rotate the flexible thin optical member sandwiched in-between.

Abstract: Provided is a disc clamping structure, a spindle structure, and an optical disc drive having the disc clamping structure. The disc clamping structure includes a chucking spring comprising a pressing portion pressing an upper surface of the clamper, and elastic portions surrounding the pressing portion and providing an elastic force toward the clamper. The disc clamping structure does not require a magnetic thrust as does the conventional optical disc drive.

Abstract: A turntable device and a disk driving device having the same are disclosed. The turntable device, for detachably securing a disk, may include: a centering part, in an inner perimeter of which slots are formed along a circumferential direction that provide an elastic force; and a base, on which a conical extension part is formed that is configured to slidably support an inner perimeter of the centering part. The turntable device can improve alignment between the centers of rotation of the motor and the disk, even for high-speed rotations.

Abstract: The present invention relates to a disc chucking apparatus having claws that horizontally move and provide elasticity to improve performance in centering and chucking a disc. The disc chucking apparatus includes: a centering base to which an inner circumferential surface of a disc is fixed; a plurality of chuck chips arranged at regular intervals along an outer circumferential surface of the centering base; and a plurality of elastic support parts disposed to be opposite to the chuck chips on the centering base, rotating horizontally when the disc is mounted, and pressing the inner circumferential surface of the disc in an outer diameter direction thereof.

Abstract: A clamp 1 for a disk rotation driving device 3 has a centering hole 18 and a contact portion 17. The centering hole 18 is fitted to an outer circumference of a centering projection 19 of a hub 7 of the disk rotation driving device 3. A clamping screw 21 is screwed into an axial center of the hub 7 so that a fastening head 23 of the clamping screw 21 fastens the clamp 1 to the hub 7 and so that the contact portion 17 of the clamp 1 comes in contact with an information recordable magnetic disk 5 attached to the hub 7 and applies pressing load onto the disk 5 in a rotation axis direction. The clamp 1 includes a centering cylinder 13 bent in an axial direction. The centering cylinder 13 has a circumferential inner surface. The inner surface defines the centering hole 18. The rounded section 29 is provided along an edge of the centering hole 18 and has a radius smaller than the thickness of the centering cylinder 13. The fastening surface 25 is continuous to the rounded section 29.

Abstract: A data storage medium support member is produced by resin molding. The data storage medium support member includes an accommodating portion, a guide portion, and a gate cut portion. The accommodating portion accommodates a magnetic member around a central axis. The guide portion has a guide surface for guiding an inner edge of a disc, and is arranged radially outward of the accommodating portion. The gate cut portion is formed on a rear surface of the guide portion. The data storage medium support member can be produced by the resin molding while securing space for accommodating the magnetic member and preventing an increase in the axial dimension of the data storage medium support member.

Abstract: A low-cost disk device with which the same spindle motor and clamper can be used for different types of disk device, such as a DVD drive. A clamper includes a clamper main body and a plurality of positioning components. The clamper main body clamps a disk between itself and a spindle motor that holds and rotates the disk. The plurality of positioning components are formed on the clamper main body for the relative positioning of the clamper main body and each of the plurality of spindle motors in the radial direction.

Abstract: A motor includes a rotating body including a magnet, and a fixed body including a stator. The stator includes a stator core having an annular core back portion with an upper and a lower surface, and a plurality of circumferentially spaced-apart tooth portions extending from the core back portion in a direction away from the rotational axis, and a plurality of coils provided by winding a conductive wire around the tooth portions of the stator core with multiple turns. The rotor holder is arranged axially above the stator to cover the stator. Further, an annular or arc-shaped attracting magnet arranged to attract the rotor holder toward the stator is arranged radially inwardly of the core back portion, the attracting magnet having an upper surface axially facing toward the rotor holder, and a lower surface arranged axially below the upper surface of the core back portion of the stator core.

Abstract: A motor device includes: a rotor case rotated along with a shaft; a chuck housing mounted on a hub of the rotor case; a chuck member mounted on the chuck housing such that the chuck member is protruded from the interior to an outer side, to fix a disc; and a concave portion formed as a recess on the rotor case to form a gap with the chuck support in contact with the chuck member to thereby prevent a frictional contact between the rotor case and the chuck member.

Abstract: A turntable of a recording medium drive can include a coupler having an inner circumference to which a rotating shaft is fixed, and an outer circumference onto which a disk is inserted; a table extending outwardly from the outer circumference of the coupler and for mounting the disk thereon; and first and second claws elastically supporting the disk by making contact with a clamping region of the disk. In an embodiment, the distance from the center of the rotating shaft to an outer surface of the first claws making contact with the clamping region of the disk is longer than the distance from the center of the rotating shaft to an outer surface of the second claw making contact with the clamping region of the disk.

Abstract: A space for accommodating therein a portion of an optical pickup mechanism is arranged below a disk loading portion of a turn table member of a chucking mechanism of the present invention. The space is arranged axially below a disk mounting surface. Since such space is provided, a recording/reproducing portion will be allowed to move closer to a brushless motor, and therefore a second lens arranged further away from the brushless motor will be allowed to move radially inward of a recording/reproducing area of an optical disk.

Abstract: A disc clamping mechanism includes a clamp board, a clamp base, a first supporting unit and a second supporting unit. The clamp board rotatably clamps a disc in cooperation with a turntable to be rotated in a housing. The clamp base rotatably supports the clamp board at a position opposite to the turntable, and is movable so as to move away from or come into contact with the turntable. The first supporting unit comes into contact with a first peripheral edge of the clamp board protruding from the clamp base when the clamp board moves away from the disc according to the movement of the clamp base, to exert pushing force in a direction of the turntable side and pushing force in a direction of the clamp base side against the first peripheral edge. The second supporting unit is provided at the clamp base, and securely supports the second peripheral edge of the clamp board situated at a position opposite to the first peripheral edge when the first peripheral edge is pushed by the first supporting unit.

Abstract: It is an object of the present invention to provide a low-cost disk device with which the same spindle motor and clamper can be used for different types of disk device, such as a DVD drive. A clamper comprises a clamper main body and a plurality of positioning components. The clamper main body clamps a disk between itself and a spindle motor that holds and rotates the disk. The plurality of positioning components are formed on the clamper main body for the relative positioning of the clamper main body and each of the plurality of spindle motors in the radial direction.

Abstract: A turn table of a spindle motor in which a small-diameter disk can be freely attached and detached is disclosed, wherein the disk insertion unit includes an inclination portion guiding the inserted disk, and a vertical portion extensively formed from the inclination portion to the disk accommodation unit to allow an inner periphery of the disk to be brought into contact, and wherein the claw includes an inclination claw portion guiding the inserted disk and a vertical claw portion bent from the inclination claw portion to chuck the disk, and wherein an outer diameter of the vertical portion at the disk insertion unit is 14.94˜l4.96 mm and an outer diameter of the vertical claw portion at the claw is 15.17˜15.23 mm.

Abstract: A disk-chucking device comprises a pressing member including a circular groove which is provided around a circumference of the clamp member, and a clamping member mounted on a turning plate for clasping the circular groove of the pressing member. The turning plate provides a through hole at the center thereof which allows the pressing member passing through, and a plurality of first notch portions disposed along the circumference of the through hole. The turning plate is slidably connected to a mounting board through the clamping member. The turning plate can rotate with respect to the mounting board to move the pressing member vertically. Thus, the pressing member can be pressed onto and removed from a disk support of the displayer according to the rotation of the turning plate. The present disk-chucking device can chuck the disk securely regardless of the position of the disk player.

Abstract: The invention aims to reduce the size of a disk clamp mechanism to be built into a disk player. The clamp mechanism comprises: a disk clamp portion formed integrally with a turntable; a clamper; and a clamper holder for holding the clamper via a clamper mounting shaft adapted to hold the clamper in rotatable fashion, wherein a flange portion provided at an end of the clamper mounting shaft is placed within a space formed inside the clamper. The clamper comprises a peripheral portion and a chamber portion in which the space is formed, and the disk clamp portion has a recessed groove portion engageable with the chamber portion, the structure being such that, when the disk is clamped, the end portion of the chamber portion is accommodated into the disk clamp portion, thus achieving a size reduction by reducing the height in a direction perpendicular to the disk.

Abstract: There is provided a disc device achieving a reduced thickness by reducing as much as possible the space required for sandwiching operation by a turn table and a clamper while assuring the space where an inserted disc is conveyed inside the device. The disc device includes: a clamper unit having a clamper for sandwiching a disc-shaped recording medium by a floating unit held via an elastic member to a fixed frame; and a disc recording/reproduction drive unit having a turn table. The disc device is configured so that when the disc-shaped recording medium is sandwiched, a part of the clamper and a part of the turn table are contained in each other.

Abstract: A disk player is configured so that a steel plate-made clamper plate 3 is bridged between wall parts 2a of both sides of a cabinet and is fixed and a disk D on a tray 1 is clamped by a turntable 7 and a clamper 5 and the disk D is rotated by the turntable 7 and information recorded on the disk D is read by an optical pickup, spiral reinforcement portions 3c are formed by closely folding both side edges of the clamper plate 3 in a manner of winding at least two times.

Abstract: A low-profile chucking mechanism holds a disc recording medium on a turntable that has a plurality of first engaging teeth and a plurality of second engaging teeth. When the disc recording medium is to be mounted on a disc supporting surface of the turntable, the first engaging teeth are pushed radially inwardly of the rotational axis of the turntable by the edge of a central circular hole of the disc recording medium. When the first engaging teeth are moved, the second engaging teeth are biased in ganged relation to the first engaging teeth radially outwardly of the rotational axis of the turntable and engage the edge of the central circular hole of the disc recording medium mounted on the disc supporting surface, thereby pressing and holding the disc recording medium against the disc supporting surface.

Abstract: The present invention provides a disk reproducing device with a disk clamp mechanism capable of securely grasping a disk and making the device smaller. An inclined portion and a clamper supporting annular portion are formed in a clamper support plate, and a clamper is mounted in an opening formed in the inner circumference of the damper supporting annular portion. Thereby, even if an upper brim portion is located in the middle of the inclined portion when a disk is removed, the upper brim portion slides down along the inclined portion so that the clamper is placed on the damper supporting annular portion. When the disk is again inserted and rotated, the disk can be securely grasped between the clamper and a turntable without a displacement of the clamper. Further, the inclined portion can improve the strength of the damper supporting annular portion, thereby making it possible to thin the clamper supporting annular portion.

Abstract: There is provided an apparatus for optical disc spin-coating, comprising a cap having a tapered protruding portion or a recess in its central lower portion; a turntable for rotation that has a tapered recess or protruding portion formed in an end of its central axis that is inserted into a center hole of an optical disc, wherein the tapered recess or protruding portion of the turntable is coupled with the tapered protruding portion or recess of the cap in a convexo-concave structure; and a vacuum hole formed in an optical disc support of the turntable. When the cap is eccentrically placed on the optical disc, the cap can be easily attached. In addition, the cap can be easily detached from the optical disc by using vacuum pressure. As a result, the operability and manufacturing efficiency can be increased.

Abstract: To reduce abnormal sound produced by contact between a clamper and a turntable between which hold and sandwich a disk. When a magnet provided for a turntable and a magnetic substance for a clamper provided for the clamper in a vertically movable manner are attracted toward each other by a magnetic force, a protrusion formed in an underside of the clamper pushes the turntable, which causes a curved part of the clamper to deform and causes the magnetic substance for the clamper to move in an opposite direction against the attraction toward the magnet by the magnetic force. This allows the curved part to attenuate impact accompanying the contact between the clamper and the turntable.

Abstract: Noise produced when a turntable comes into contact with a damper is reduced without increasing the number of parts. A metallic support plate is suspended on a top surface of a frame and the support plate is provided with a damper facing a turntable. The support plate is provided with long holes so as to suppress vibration transmitting from the damper to the support plate when the turntable and the damper contact each other by means of the long holes. This restrains a sound of contact between the turntable and damper from being amplified through the vibration of the support plate.

Abstract: A disk reproducing apparatus with improved quality is provided which has a clamper and a clamper plate. By providing the clamp plate with connection portions radially extending from a radially inner peripheral portion toward radially outer peripheral portion of the clamp plate, the axial displacement relative to a clamp holder can be increased as compared to that in the existing structure. Moreover, by disposing the clamper on the radially inner peripheral portion of the clamp plate so as to be elastically deformable, the spacing in clamping can be increased to a drive part.

Abstract: A radial vibration detection apparatus for detecting the radial vibration value of an optical assembly of an optical disc drive. The radial vibration detection apparatus includes a cover, a magnet, a plurality of clamping structures and a base. The cover has a cover body, a plurality of engaging elements and a circumferential flange. The engaging elements are disposed on the lower surface of the cover body in an equiangular manner. The circumferential flange is formed on the cover body. The cover body has a magnet accommodating portion formed on the center thereof. The magnet is disposed in the magnet accommodating portion. The clamping structures are disposed in the engaging elements, respectively. The base is disposed under the cover and has a bottom, a circumferential wall and a second positioning element. The second positioning element is disposed on the circumferential wall to engage the first positioning element of the cover.

Abstract: A disk drive includes a turntable and a clamper. The turntable and/or the clamper have four or more projections, each of which has predetermined height. The projections are arranged at positions for supporting/holding a mounted disk by using the four or more projections, wherein the projections are located at substantially equal intervals around a circumference of the turntable/clamper and the tips of the projections are substantially in the same plane.

Abstract: This chucking apparatus 1 is an apparatus for holding a disk 5 which has been placed on a turntable 3 of a disk player, and includes a magnet 13, a chuck disk 11, a chuck arm 17, first engaging faces 13b and second engaging faces 25c. The chuck disk 11 is arranged so as to be faced with the turntable 3, and adapted to hold the magnet 13. The chuck disk 11 is a disc-like member which has a plurality of claws 25 formed around the magnet 13 which has been held and projecting toward the turntable 3, and engaging parts 25a provided at distal end portions 25a of the plurality of claws 25 to be engaged with an outer circumference of the magnet 13. The chuck arm 17 holds the chuck disk 11 rotatably. The first and the second engaging faces 13b and 25c restrict the engaging parts 25a of the claws 25 from deflecting in a direction away from the magnet.

Abstract: A disc driving apparatus is provided with: a turn table on which a disc type record medium is loaded; a clamper opposed to the turn table for clamping the disc type record medium on the turn table by means of a magnetic force applied between the turn table and the clamper; and a spindle motor for rotationally driving the turn table. The clamper has at least 3 abutting portions for abutting to the disc type record medium such that only one of the abutting portions is respectively on a line passing through a center of the clamper in a plain parallel to a record surface of the disc type record medium.