Abstract: A disk apparatus is provided that includes an apparatus body including a driving section for rotating a disk, an information reading/writing section, and a control section for controlling the driving section and the information reading/writing section. The disk apparatus also includes a housing accommodating the apparatus body and including a housing body having an accommodating recess formed at a position thereof corresponding to the driving section and the information reading/writing section for accommodating the disk therein, and a lid member supported for pivotal motion on the apparatus body for closing up the accommodating recess. The accommodating recess has a convex portion formed in a projecting manner on a bottom face thereof such that the convex portion surrounds the disk mounted around a rotary shaft of the driving section A space which is formed by the convex portion surrounds the disk having a circular shape and a polygonal shape combined.

Abstract: In a brushless motor for use in a disk drive, a rotor is mounted onto a tube portion of a housing. A retaining claw is formed at an upper end of the tube portion. A turntable has a central concave portion which accommodates an upper portion of the tube portion of the housing. A retaining member is provided radially outside the central concave portion, and includes a plurality of retaining pieces extending to the inside of the central concave portion. When the rotor is mounted onto the housing, the retaining pieces come into contact with the retaining claw and then move upward. When the rotor moves upward relative to the housing, the retaining pieces come into contact with the retaining claw, thereby restricting upward movement of the rotor. Upward movement of the retaining pieces is restricted by contact between the retaining member and the turntable.

Abstract: A turn table of a motor includes a first cylindrical portion extending in an axial direction, a first discoid portion radially outwardly extending from the first cylindrical portion, and a second discoid portion radially outwardly extending from the second cylindrical portion. A chucking member arranged on the turn table includes a main body having a diameter substantially the same as that of a center opening of a data storage disk to be arranged on the motor. The chucking member also includes a plurality of chucking claws having radially tip ends arranged radially outside of the outer circumferential surface of the main body and a plurality of coil springs applying bias force pressing the chucking claws in the radially outer direction. A radially inner end of each of the coil springs comes in contact with and is supported by at least one of the radially inner wall of the main body and the second cylindrical portion of the turn table.

Abstract: A tip portion of a claw member is, when the same is at a lowest position, axially above a bottom surface of an upper disk base of a multi-layered disk. By virtue of such configuration, the tip portion will not be caught between the upper disk base and a lower disk base of the multi-layered disk.

Abstract: A motor includes a chucking device for detachably holding a disk-shaped storage medium. The chucking device includes a plurality of radially outwardly biased claw members. Further, the claw members make contact with a top surface of a cover portion of a turntable when the claw members are in contact with the top edge of a central opening of the storage medium. At least one of the claw member's contact sections and the turntable's contact section is made of a material different than a material forming the remaining sections of the claw members and the remaining section of the turntable so that the static friction coefficient between the claw member's contact sections and the turntable's contact section becomes greater than the static friction coefficient between the claw members and the rest portions.

Abstract: A chucking device comprises a retainer section for retaining a disc, a guiding section for guiding the disc to the retainer section, and a supporter for supporting the retainer section and the guiding section. The guiding section has a small enough angle for a guiding section side angle of inclination ?1 so as not to make contact with a upward facing disc, of a multilayer disc, thereby reducing a disc loading force.

Abstract: Disclosed herein is a turntable assembly. The turntable assembly includes a turntable for mounting the optical disk thereon, and a chucking member which is contracted toward a center of an optical disk and holds the optical disk. A spring elastically biases the chucking member in a direction away from the center of the optical disk. An elastic support member supports the chucking member in a direction opposite an inserting direction, so that at least part of the elastic support member supporting the chucking member is elastically deformed in the inserting direction of the optical disk. A housing accommodates the chucking member, the spring, and the elastic support member therein. The elastic support member includes a support part which is spaced apart from the turntable to undergo elastic deformation in the inserting direction, and supports the chucking member.

Abstract: A collet assembly that holds two disks to be processed simultaneously uses alternating pressure zones to press against the inner diameter of the disks to hold them in place in a processing machine. While the disks to be processed are typically media disks, any type of disk processing can make use of the collet assembly of the present invention. Each pressure zone includes a contact surface on a chuck blade. When a travel stroke is initiated by an actuating device (typically an air cylinder), the drawbar pulls an angled expander rearward. The expander urges the chuck blades outward. Half of the pressure zones apply pressure (via the contact surfaces on the chuck blades) to the first disk, while the other half of the contact surfaces press against the second disk, so that both disks are held securely in position.

Abstract: A chucking apparatus in which a plurality of pawl bodies are provided in a radial direction of a hub body of a turntable such that said pawl bodies can move, a center hole of a disk is pressed by said pawl bodies to hold said disk, wherein said chucking apparatus comprises a resilient member for biasing said pawl bodies outward of said hub body, each of said pawl bodies includes a pawl portion which comes into contact with said disk, and a pawl-side stopper for limiting outward movement of the pawl bodies caused by said resilient member, said hub body includes a pawl opening through which said pawl portion can project outward, and a hub-side stopper which abuts against said pawl-side stopper, and a contact surface of a lower end of said pawl body with respect to a lower part is of an arc shape.

Abstract: A disk drive 1 of the invention has through holes 27 formed in a turntable 4 in such a manner as to surround circumferentially a spindle 5, dislodgement preventive portions 28 provided to extend from a lower surface of a disk holding portion 9 towards a base portion 2 through the through holes 27, a hook locking portion 29 formed on an outer circumferential wall of a bearing holding portion 15 and hook portions 30 formed on distal end portions of the dislodgement preventive portions 28 which lie to a side of the base portion 2. In addition, the base portion 2 of the disk drive 1 of the invention includes a plurality of openings into which respective coils 20 are partially inserted and is configured such that an outer circumferential portion of a stator core 19a and the base portion 2 are spaced apart from each other at a predetermined interval.

Abstract: A chucking apparatus in which a plurality of pawl bodies are provided in a radial direction of a hub body of a turntable such that said pawl bodies can move, a center hole of a disk is pressed by said pawl bodies to hold said disks wherein said chucking apparatus comprises a resilient member for biasing said pawl bodies outward of said hub body, each of said pawl bodies includes a pawl portion which comes into contact with said disk, and a pawl-side stopper for limiting outward movement of the pawl bodies caused by said resilient member, said hub body includes a pawl opening through which said pawl portion can project outward, and a hub-side stopper which abuts against said pawl-side stopper, and a coil spring is used as said resilient member, and an outer end of said coil spring is provided at a location lower than an inner end of said coil spring.

Abstract: A drive motor for a recording disk of one example of the present invention includes a rotor holder (12) fixed to a shaft (8) which is a rotational member and a centering portion (20). A spacer (38) is provided between a base portion of a chuck (26), at least one portion thereof is accommodated in the centering portion (20), and a rotor holder (12).

Abstract: A chucking apparatus in which a plurality of pawl bodies are provided in a radial direction of a hub body of a turntable such that the pawl bodies can move, and a center hole of a disk is pressed by the pawl bodies to hold the disk, wherein the chucking apparatus comprises a resilient member for biasing the pawl bodies outward of the hub body, each of the pawl bodies includes a pawl portion which comes into contact with the disk, and a pawl-side stopper for limiting outward movement of the pawl bodies caused by the resilient member, the hub body includes a pawl opening through which the pawl portion can project outward, and a hub-side stopper which abuts against the pawl-side stopper, a downward guide surface is provided at a location lower than a tip end of the pawl portion, the hub body is provided with an upper receiving surface at a position opposed to the downward guide surface, and the pawl portion is pressed from above by the disk, the first inclined surface abuts against the upper receiving surface wh

Abstract: A chucking apparatus in which a plurality of pawl bodies are provided in a radial direction of a hub body of a turntable such that the pawl bodies can move, a center hole of a disk is pressed by the pawl bodies to hold the disk, wherein the chucking apparatus comprises a resilient member for biasing the pawl bodies outward of the hub body, each of the pawl bodies includes a pawl portion which comes into contact with the disk, and a pawl-side stopper for limiting outward movement caused by the resilient member, the hub body includes a pawl opening through which the pawl portion can project outward, and a hub-side stopper which abuts against the pawl-side stopper, a position of the pawl portion in a standby state where the disk is not held by the pawl portion is set lower than a position of the pawl portion in a recording/replaying state where the disk is held by the pawl portion.

Abstract: A disk drive comprising a turntable 10 which has a ring-like disk receiving surface 11 on which a disk 40 is placed, a disk holding mechanism 20 which holds the disk 40 on the turntable 10, a disk-retaining abutment member 30 which has projections 34 and 35 provided at an outer periphery of the hole 31 and projecting toward the turntable 10, and a moving mechanism which allows the disk-retaining abutment member 30 and the turntable 10 to relatively approach each other and separate from each other, wherein the projections 34 and 35 are formed by a first deformed portion formed at a position opposed to the disk receiving surface 11 and a second deformed portion formed at a location closer to an inner peripheral side than the disk receiving surface 11, the projection 34 or 35 formed by the second deformed portion most projects toward the turntable 10.

Abstract: A chucking mechanism according to the present invention includes a claw member which retains a discoid disk and is arranged between a plurality of claw portions which put a radial force outwardly to a central opening portion of the disk and a plurality of claw portions, a receiving portion and a sliding portion.

Abstract: A second inclined surface (84c) which abuts against a recording disk of a chuck pawls (84) of a recording disk holding mechanism (80), and a third inclined surface (84d) which is a curved surface for guiding chucking motion of the chuck pawls (84) are provided. A boundary between the second inclined surface (84c) and the third inclined surface (84d) is formed with a stepped recess approaching a base.

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: A chucking device comprises a retainer section for retaining a disc, a guiding section for guiding the disc to the retainer section, and a supporter for supporting the retainer section and the guiding section. The guiding section has a small enough angle for a guiding section side angle of inclination ?1 so as not to make contact with a upward facing disc, of a multilayer disc, thereby reducing a disc loading force.

Abstract: A movement pivot receiving portion which receives a movement pivot portion of a claw member and a movement support receiving portion which receives a movement assist portion of the claw member are arranged radially within a cylindrical portion of a center case. By virtue of such configuration, both receiving portions are designed with a greater degree of freedom within a space between an inner circumferential surface of the cylindrical portion and an outer circumferential surface of a base portion. Therefore, the claw member may be designed to have a preferable thickness while achieving a preferable movement of in an axial direction.

Abstract: A chucking mechanism operable to detachably set thereon a discoid disk including a central opening portion, the chucking mechanism comprises a center case arranged concentrically with a predetermined central axis, including a cylindrical portion which fits the central opening portion, a top plate covering an axially upper side of the cylindrical portion, and a plurality of openings arranged in a circumferential direction extending from the cylindrical portion to an outer circumferential side of the top plate portion, a claw member movable with respect to the opening, protruding in a radially outward direction from the cylindrical portion, and making contact with the central opening portion of the disk, an elastic member providing radial force to the claw member, and a turn table including a disk setting surface setting thereon the disk, wherein the claw member includes, a claw portion having a disk retaining surface making contact with the central opening portion and retaining the disk, and a movement support

Abstract: A claw member includes at a radially inward surface thereof a protrusion inclined surface in order to minimize deformation occurring in an axial direction to an elastic member which is a coil spring. The protrusion inclined surface is preferably inclined, when a tip portion of the claw member is at an axially lowest point, to be substantially perpendicular to the central axis, or such that the further radially inward a portion thereof is the axially lower the portion is. By virtue of such configuration, the protrusion inclined surface minimizes deformation occurring to the elastic member in the axial direction.

Abstract: A claw member includes a claw portion and a movement support portion. The movement support portion includes a movement pivot portion which is a pivotal portion of the movement of the claw member, and a movement support portion formed radially inward of the movement pivot portion. The claw member is allowed to maintain an axial height of a tip portion thereof while smoothly maintaining a movement in a radially inward direction thereof since a movement support receiving portion and the movement support portion make contact with one another.

Abstract: Disclosed herein is a turntable assembly. The turntable assembly includes a turntable for mounting the optical disk thereon, and a chucking member which is contracted toward a center of an optical disk and holds the optical disk. A spring elastically biases the chucking member in a direction away from the center of the optical disk. An elastic support member supports the chucking member in a direction opposite an inserting direction, so that at least part of the elastic support member supporting the chucking member is elastically deformed in the inserting direction of the optical disk. A housing accommodates the chucking member, the spring, and the elastic support member therein. The elastic support member includes a support part which is spaced apart from the turntable to undergo elastic deformation in the inserting direction, and supports the chucking member.

Abstract: The disk-chucking device includes a chuck base having a plurality of arranging parts recessed along an outer periphery of the chuck base and formed at the center of the chuck base with a central boss connected to the motor, a plurality of chuck pins respectively assembled to the arranging parts, a plurality of spring members elastically supporting a rear end of the chuck pins forwardly such that a leading end of the chuck pins can be exposed to an outer surface of the chuck base, and a rigid frame contacting the spring members and formed with a central hole such that the central hole has an inner diameter larger than an outer diameter of the central boss, thereby providing a degree of freedom, which allows the rigid frame to be moved in a horizontal direction within an allowable range.

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: There is provided an optical disk apparatus that can inhibit, during recording or reproduction of data on or from an optical disk, a side runout that may occur in the optical disk in its circumferential direction as a result of Coriolis force when a disk rotating shift is subjected to procession movement, thereby allowing recording and reproducing quality to be stabilized and a reduced size of the apparatus. The disk apparatus provided has pressure pawls arranged at intervals smaller than those in the prior art, each of which is provided with a plurality of pressing points arranged at intervals larger than those in the prior art. Particularly, an interval between the pressure pawls is an acute angle in terms of the center angle of the disk. An interval between the pressing points is an angle of 35° or larger.

Abstract: A disc player 10 which moves a disc stopper 55 controlling the movement of a drawn disc 1 and clamps and chucks the disc on a turntable, wherein the disc stopper is designed so that is it positioned in a positioning position where the disc and the turntable are positioned concentric with each other and in a retracted position where the disc stopper is spaced from the disc clamped and chucked to a turntable.

Abstract: An optical disk drive includes a base for holding an optical disk, a protrusion protruding out from the base that extends through the center hole of the optical disk when holding the optical disk, and at least one hook rotatably installed on the protrusion. When the disk drive stops, the hook is retracted to within the edge of the protrusion and when disk is rotated up to a predetermined speed, the hook extends out from the edge of the protrusion to hook the optical disk.

Abstract: A clamp/alignment mechanism has: a turntable on which a recording medium is mounted, the turntable being rotated by a rotation driving device; a holding device for holding the recording medium mounted on the turntable; an aligning device for aligning the recording medium mounted on the turntable; and a driving device for driving both the holding device and the alignment device. The driving device is configured to drive the aligning device in an aligning direction along which the recording medium is subjected to alignment thereof, in cases where the holding device is driven in a holding direction in which the recording medium is to be held.

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: When a disk (1) is placed at a playback position, a clamp arm (15) clamps the disk (1). The clamp arm (15) has an engagement hook (16) for engaging with an engagement groove (12) of a fixed base (11) when the clamp arm (15) pivots on a slide base (13) so as to return to a standby position for waiting for a pivot while the slide base (13) slides.

Abstract: Disclosed is a centering device of a spindle motor. The centering device includes a body portion which is disposed on the rotor of the spindle motor, and which is provided with a central hole for accommodating the shaft of the spindle motor; and a plurality of centering elastic finger units, located along the periphery of the body portion. Each centering elastic finger unit includes at least two elastic fingers. Each elastic finger includes a free end which extends from the body portion in the circumferential direction of the rotor, and which has a contact portion adapted to urge against an optical disk to guide the centering of the optical disk with respect to the shaft of the spindle motor. Preferably, the contact portion is formed into an arc surface so as to reduce the contact area and thus the friction between the elastic fingers and the disk.

Abstract: A holding device includes a base, a plurality of holding members, and a plurality of elastic elements. The base includes an annular wall extending in a direction substantially orthogonal to a plane on which the base lies. The annular wall includes a plurality of notches. The holding members are mounted in the annular wall and spaced along an angular direction. Each holding member includes a pressing member extending beyond the annular wall of the base via an associated notch of the annular wall. Each elastic element is mounted between two holding members adjacent to each other. A diameter of a circular ring formed by the holding members changes in response to expansion or compression of the elastic elements, causing the pressing member of each said holding member to move between a holding position outside the annular wall and a release position inside the annular wall.

Abstract: In a disk apparatus for driving a recording disk medium, a spindle motor is provided with a rotary shaft. A chucking table, on which the recording disk medium is mounted, includes a support integrally formed with a support base having a supporting face which supports the recording disk medium, a cylindrical bearing part, into which the rotary shaft is fitted, extending from the support base in parallel with the rotary shaft, and an annular abutment part extended from the support base in parallel with the bearing part, to be abutted against an inner periphery of the recording disk medium. The chucking table includes at least one claw member provided in an outer periphery of the abutment part, and an urging member disposed between the claw member and the bearing part so as to retractably urge the claw member outwards in a radial direction of the recording disk medium.

Abstract: A disk clamp apparatus, includes a disk mount surface part on which a record medium having a disk shape is mounted, the disk mount surface part including a part which faces an innermost circumference surface of the record medium, and a part which faces an outer circumference surface situated further out than the innermost circumference surface, wherein the part which faces the innermost circumference surface of the record medium has a same height as a height of the part which faces the outer circumference surface situated further out than the innermost circumference surface.

Abstract: A device includes a casing having a plurality of equispaced openings formed around, and a plurality of spring-loaded radial tongues partially extended out from and retractable into the openings. Each of the radial tongues has a lower curved surface with a constant curvature in any imaginary contour line throughout at least one area of the lower curved surface. Furthermore, the constant curvature is exactly the same as the curvature of the rounded inner edge of the optical disk to be held.

Abstract: A disk holding device according to the present invention is constituted by a turntable (21), a center hub (25), plural claw-shaped members (26), elastic members (27) which energize the claw-shaped members (26) in the direction of the radius of a disk (23), a centering ring (28) having an inclined portion (28b), which ring is movable in the direction vertical to the disk surface, and an elastic member (29) which energizes the centering ring (28) in the direction along which the disk (23) is pushed up. The internal diameter of the disk (23) engages with the inclined portion (28a) before a cylindrical portion of the internal diameter of the disk (23) gets over the claw-shaped members (26), whereby centering of the disk (23) is performed, and then the disk (23) is held. The disk holding device constructed as described above is able to hold an optical disk such as a CD, a DVD, or the like, and perform more reliable centering of the disk.

Abstract: The invention relates to an optical disk drive, and more particularly, to a holder for disk drives having an improved chuck structure for seating a disk. The holder of the invention, in use, is inserted into a central opening of a disk for detachably seating the disk, and comprises: a circular hub projected upward and sized equal to the central opening of the disk; a chuck projected from a lateral portion of the hub, wherein the chuck includes a rear portion elastically connected with the hub, a peak formed in a front portion of the chuck and a lower circular face of a curvature extended downward from the peak; and a support formed integral with the hub for contacting the lower circular face of the chuck to enable circular motion of the chuck.

Abstract: A device includes a casing having a plurality of equispaced openings formed around, and a plurality of spring-loaded radial tongues partially extended out from and retractable into the openings. Each of the radial tongues has a lower curved surface with a constant curvature in any imaginary contour line throughout at least one area of the lower curved surface. Furthermore, the constant curvature is exactly the same as the curvature of the rounded inner edge of the optical disk to be held.

Abstract: A holding device includes a base, a plurality of holding members, and a plurality of elastic elements. The base includes an annular wall extending in a direction substantially orthogonal to a plane on which the base lies. The annular wall includes a plurality of notches. The holding members are mounted in the annular wall and spaced along an angular direction. Each holding member includes a pressing member extending beyond the annular wall of the base via an associated notch of the annular wall. Each elastic element is mounted between two holding members adjacent to each other. A diameter of a circular ring formed by the holding members changes in response to expansion or compression of the elastic elements, causing the pressing member of each said holding member to move between a holding position outside the annular wall and a release position inside the annular wall.

Abstract: There is provided a clamp mechanism for clamping and unclamping an information recording disk to be loaded on a loading plane of a turntable. The clamp mechanism comprises a plurality of holders and a driving device. The holders each holds the disk loaded on the loading plane of the turntable. The driving device drives the holders in both of a holding direction along which the disk is held and an un-holding direction along which the disk is released from being held. At least one of plural holders is configured to press, in a direction parallel to the loading plane, the disk loaded on the turntable.