Abstract: An optical disc device includes: a loader body having a guiding recess formed of a linear portion and a sloped portion; a traverse chassis mounted in the loader body and having a protrusion that is guided along the recess; a turntable mounted on the traverse chassis, for mounting the optical disc; and a clamper which clamps the optical disc between the clamper and the turntable when the traverse chassis ascends relative to the loader body to a clamp position, in which when the traverse chassis is at a position lower than the clamp position, the protrusion is guided along the recess, and when the traverse chassis is at the clamp position, the protrusion is positioned inside the sloped portion.

Abstract: An optical disc apparatus of the present invention is configured to include: a chassis which includes a supporting portion that supports an optical pickup, a pickup moving mechanism, and a disc motor, and coupling portions that are coupled to a tray at plural points, which is formed of a synthetic resin material, and in which the supporting portion and the coupling portions are integrated with each other; and a flexible flat cable which electrically couples between a first circuit substrate fixed to the bottom case side and a second circuit substrate fixed to the tray or the chassis side, and which is arranged between a bottom cover and a bottom case while its plane surface is folded in a state where the tray is inserted into an apparatus body.

Abstract: An optical device is provided including a tray body linearly moving and loading an optical disk. A case guide is configured to guide the linear movement of the tray body. A damper is interposed between the tray body and the case guide to attenuate vibration of the tray body.

Abstract: A traverse module of an optical disc drive includes a base and a cover connected to the base that includes at least one spring tab integrally formed therewith. A pair of guide bars is connected to the base. A pickup head module is slidably connected to the guide bars. At least one adjusting member is movably connected to the base. The at least one adjusting member supports at least one of the guide bars and the at least one spring tab presses against the at least one of the guide bars, the at least one adjusting member is able to urge the at least one of the guide bars to move.

Abstract: An optical disc drive includes a traverse deck having left and right sides to be balanced. The optical disc drive includes a main deck, a tray, a turntable, an optical pickup, a traverse deck, and a balancer. The optical pickup is mounted movably in the back-and-forth direction to emit light to an optical disc placed on the turntable to read and write information from and to the optical disc. On the traverse deck, the turntable is mounted at the front side of the traverse deck and the optical pickup is mounted movably in the back-and-forth direction. The balancer is mounted on the traverse deck to balance the weights of the left and right sides of the traverse deck.

Abstract: A vibration-damping mechanism for the drive chassis is configured in such a manner that insulators each are placed in at least three respective predetermined positions of a drive chassis on which a motor and an optical pickup unit are mounted, and a weight plate is floatingly and movably supported on the drive chassis by way of the insulators, wherein the shape of the weight plate is determined based on a predetermined vibration-damping frequency, the at least three respective predetermined positions, and a spring constant of the insulators which are identical to each other.

Abstract: A portable optical disc player includes a housing having a top casing and a bottom casing, a traverse module, a plurality of first fixing members, and a plurality of fasteners. The traverse module is configured for reading information from, or writing information to, a disc and disposed (or sandwiched) between the top casing and the bottom casing. The plurality of first fixing members is mounted on the interior surface of one of the top casing and the bottom casing. The plurality of fasteners extends through the other of the top casing and the bottom casing, and is received in the plurality of first fixing members respectively so as to fix the top casing and the bottom casing together. Thus, the traverse module is firmly clamped by the top casing and the bottom casing accordingly.

Abstract: A MCP semiconductor device with an “anti-shake” function includes a driver chip and a logic chip. The logic chip includes a correction signal processing unit which obtains a value for vibration of apparatus based on a vibration detection signal to generate a correction signal and a control signal output unit having a plurality of types of signal output sections which output a vibration control signal in accordance with the correction signal to a vibration correction control unit which executes vibration correction control for an optical component. The logic chip further includes a driver output terminal which outputs the vibration control signal to the driver chip, an external output terminal which outputs the control signal to an external circuit other than the driver chip, and also an output switch unit which connects one of the plurality of signal output sections with the driver output terminal or the external output terminal.

Abstract: In a prior art slim-type high speed rotation optical disk apparatus, the side wall of the bottom chassis is bent at a bending point toward the side of the optical disk according to the configuration of the corner air window section of the chassis. According to the present invention, this bent side wall is formed so as to have a first vertical wall which is adjacent to the bending point and a second vertical wall which is adjacent to and lower than the first vertical wall. This constitutes an L-shaped vertical wall in the air window section of the bottom chassis, resulting in reduced noise.

Abstract: An apparatus of dynamic anti-vibration for a storage device to support a storage device in a housing is provided. The apparatus includes a base board for holding the storage device, a plurality of damping elements coupled to the base board and the housing which have damping characteristics to dissipate kinetic energy and reduce the vibration of the base board, and at least one actuator coupled to the base board and the housing. The actuator electrically connected to the control unit is driven by the control unit, so as to generate a force to neutralize the vibration of the base board.

Abstract: A pickup head is provided with a second shaft receiving section. A cutout is formed in the second shaft receiving section. A sub shaft supports the pickup head in a movable manner via the second shaft receiving section. A diameter of the sub shaft is smaller than the size of the cutout. A retainer is attached between the second shaft receiving section and the sub shaft. The retainer includes a body section and a pressing section. The body section enters the cutout in a state that a slide groove of the body section slidably fits to the sub shaft. The pressing section is elastically deformed upon contact with the sub shaft when the body section enters the cutout, and biases the second shaft receiving section via the body section such that a lower surface of the cutout is pressed against the sub shaft.

Abstract: A disk device includes: a traverse chassis, one end of which is configured to be movable between a first position and a second position in a first direction; a cam member, formed with a cam groove configured to move in a second direction orthogonal to the first direction and having a first end and a second end; a cam follower fitted with the cam groove so as to be movable between the first end and the second end in accordance with the movement of the cam member; a guide member, having a guide face configured to guide the cam follower in the first direction in cooperation with the cam member; and an urging member, configured to urge the cam follower against an inner wall of the cam groove and the guide face when the cam follower is placed in the first end.

Abstract: The position of an optical pickup with respect to a disk is maintained accurately by preventing the free end portion of a cantilever movable member from being displaced lower than its proper position during the rotation of the disk even if the movable member is heavy to have improved vibration characteristics. There are provided a movable member 4, a chassis 1, a clamp mechanism 3, and a cam mechanism 5. The cam mechanism 5 includes a shift lever 51 connected to the free end portion of the movable member 4 via elastic bodies 42 and a cam main body 55. Positioning means 8 is composed of a protrusion 53 on the shift lever 51, a stepped engaging surface 15 for supporting the protrusion 53 thereon, and a guide mechanism 71. There is also provided anti-positioning means 9 for disengaging the protrusion 53 from the engaging surface 15.

Abstract: To provide a floating lock device which can smoothly and continuously perform an operation of swinging-in and swinging-out a drive unit and switching between a floating state and lock state with a reduced space and simple configuration. The floating lock device comprises: a pick arm 130 which can be swung into and swung out of a space created by splitting trays 250 capable of housing a plurality of disks D; a drive chassis 120 which is mounted on the pick arm 130 and which has a drive unit playing the disk D; a drive mechanism which drives the pick arm 130; a floating lock mechanism of the drive chassis 120; a turning table 123 on which the disk D is mounted; and a control plate 136 which transmits drive power of the drive mechanism to the floating lock mechanism.

Abstract: In a hard disk drive (HDD) vibration control device disposed on a HDD bracket including a HDD, the HDD vibration control device includes a main body portion, a rear clip, a front clip, a left rail spring, and a right rail spring. The main body portion includes a front bar, a rear bar, left bar, and right bar. The rear clip extends down from the rear bar clamped onto the HDD. The front clip extends down from the front bar clamped onto the HDD. The left rail spring includes a first flat portion extending outwards from the left bar and including a first spring portion extending from the first flat portion. The right rail spring includes a second flat portion extending outwards from the right bar and including a second spring portion extending from the second flat portion. The first and second flat portions of the left rail spring the right rail spring rest, respectively, on top surfaces of a left side bracket and right side bracket of the HDD bracket.

Abstract: A method for reading/writing data of a disk drive that includes a spindle motor for rotating a disk and a head for reading/writing data from and to the disk. The method includes the steps of; (i) adjusting a position of the head for the first time to space apart the head from a center of the disk at a specific distance, wherein when the head is spaced apart from the center of the disk at the specific distance, the disk vibrates at the minimum magnitude during raising operation of the spindle motor from a low speed to a high speed; (ii) raising the spindle motor from the low speed to the high speed; and (iii) adjusting a position of the head for the second time to move the head to a desired track in the disk for reading/writing data in the desired track.

Abstract: The present invention discloses an optical disk drive comprising a traverse, a traverse frame, a chassis and a stopper. The traverse frame is disposed on the chassis. And one end of the traverse is disposed on the chassis and the other end is disposed on the traverse frame. The stopper includes a protruded arm and an extended arm extended from the protruded arm. The protruded arm is integrated with the traverse by sheet metal forming and the extended arm is disposed above the traverse frame. The extended arm of the stopper is interfered with the traverse frame when a heavy shock is applied to the optical disk drive. Therefore, the optical disk drive including the stopper can prevent the separation between the traverse and the traverse frame without screws when a sudden hit is applied thereto.

Abstract: Requirement: An object of the present invention is to provide a disk apparatus that includes a vibration-damping mechanism capable of substantially curbing vibrations due to eccentricity of the center of gravity of a discoid recording medium, caused to a drive chassis on which mounted are a motor for rotationally driving the discoid recording medium, and a record-playback unit for recording a digital signal onto and/or playing that back from the discoid recording medium.

Abstract: A shock isolation structure applied in an optical disc drive is provided. The shock isolation structure includes a bottom portion, a top portion, and a neck portion jointing the bottom portion and the top portion. The portions have a through hole running through the top surface of the top portion and the bottom surface of the bottom portion along a run-through central line. In the neck portion, any ring-shaped cross section using the run-through central line as the normal has a first wall thickness on a first extension line starting from the run-through central line and extending towards the outer peripheral of the ring-shaped cross section, and has a second wall thickness on a second extension line starting from the run-through central line and extending towards the outer peripheral of the ring-shaped cross section. The first wall thickness is larger than the second wall thickness.

Abstract: An external optical disk drive (99) includes a bottom housing (10), a top housing (20) coupled to the bottom housing, and a cover (40) pivotably connected to the top housing. The cover is provided with a hinge member (42). An engaging piece (424) is provided on the hinge member. A torsion spring (50) is biased between the top housing and the cover. A damping unit (32) is provided between the top housing and the bottom housing. When the cover is pivoted from a closed state to an open state, the engaging piece engages interferentially with the damping unit, and a frictional force is generated between the engaging piece and the damping unit to slow down a rotating speed of the cover to cause the cover to stop at the open state without vibration.

Abstract: An optical disc drive includes a main chassis, a deck unit mounted on the main chassis to move upward and downward, and a slider installed movably on the main chassis. The slider moves the deck unit upward and downward while moving on the main chassis and an impact absorbing member, interposed between the slider and the deck unit, absorbs an impact transmitted to the deck unit.

Abstract: A vibration damping carrier for a disk drive. The carrier may be made of plastic and includes a pair of flexible rails securable to mounting holes in a raised pad on opposing sides of a disk drive housing. Each flexible rail secures one or more sets of a spring and a protuberance in transverse alignment with the spring. Each spring is outwardly extending for engaging opposing walls of a chassis bay and each protuberance is inwardly extending into engagement with the rigid housing. When the disk drive housing and flexible rails are positioned within the chassis bay, each spring and protuberance set is transversely compressed. Typically, the disk drive housing and the chassis bay are rectangular such that the spring and protuberance are transversely compressed. The protuberances provide localized reinforcement of the rails and prevent any significant flexing from occurring.

Abstract: The invention provides an optical disc apparatus having a dynamic damper mechanism which does not use any part for exclusive use for absorbing a shock of an optical pickup. The optical disc apparatus is provided with a chassis attached to a base chassis via a first elastic body, shafts provided on the chassis, an optical pickup moving on the shaft, and a weight attached to the chassis via a second elastic body, the weight is provided with stoppers on a moving path of the optical pickup.

Abstract: Disc unit having a small number of parts and capable of effecting fitting operation with ease. A chassis is fitted via elastic members to a holder which is disposed to be moveable vertically with respect to the plane of a body frame. Each elastic member is a substantially cylindrical body having flange portions at the upper and lower end portions thereof. Further, each elastic member includes a pair of first fitting portions disposed adjacent to the inner sides of the flange portions. In addition, each elastic member includes a pair of expansion portions characterized by large diameter and disposed between the first fitting portions. The holder has supporting portions provided with a holder interface formed to fit into the first fitting portions of each elastic member. The chassis has a front holding interface formed to fit into the second fitting portion of each elastic member.

Abstract: An in-vehicle player which is mounted in a dashboard in a passenger room of a vehicle comprises: an outer housing to be assembled in a mount space provided in the dashboard; a device body contained in the outer housing; and a cushion member interposed between the outer housing and two side surfaces of the device body, wherein the cushion member is made of viscous elastic material, the cushion member has an end surface which is substantially parallel to a shearing direction thereof and stuck to a mount surface of the device body by viscosity thereof, and the cushion member has another end surface which is substantially parallel to the shearing direction and stuck to a mount surface of the outer housing by viscosity thereof, thereby to attach the cushion member to be elastically deformable in the shearing direction between the outer housing and the two side surfaces of the device body.

Abstract: An elastic restriction section (15g), formed in a substantially cylindrical configuration and having the vertical axis is provided to protrude on one side of a rear end section of a chassis (15) formed of a synthetic resin. The chassis constitutes a case body for housing a main body that performs processing of reading or recording of an optical disk. The elastic restriction section (15g) is divided into three elastic members that are elastically deformable into a diameter-reduced state, and provided to protrude at a position substantially diagonally opposite to an engagement position of a movement gear (63) of an open/close drive unit (60), the open/close drive unit (60) advancing/retreating a disk tray (50) carrying the optical disk. In the disk tray (50), an engaging recess (51e) is provided to be engaged with the elastic restriction section (15g) at a home position.

Abstract: An optical disk drive includes a damper interposed between a traverse deck having an optical pickup installed therein and a main frame having the traverse deck installed therein, thereby efficiently reducing vibration. The damper is installed in a coupling section between the traverse deck and the main frame to reduce a vibration and includes a through hole into which a boss formed in the main frame is inserted, and a support to protrude from inner circumference of the through hole such that the boss is fitted in the support.

Abstract: An optical disc drive has an improved vibration preventing device. A main chassis has opposite sidewalls and first and second mold tension parts integrally formed with the sidewalls, respectively. A pickup deck has a turn table adapted to receive a disc and a pickup moving in a radial direction of the disc and mounted to the main chassis to move up and down. A sub chassis has first and second mold tension guide parts mounted on a front of the pickup deck and supported by and under the first and the second mold tension parts. A disc tray moves inwardly and outwardly with respect to the main chassis. The mold tension guide parts of the sub chassis are elastically supported by the mold tension parts of the main chassis in an up-position of the pickup deck, thereby absorbing external impacts and inner vibrations.

Abstract: A disc drive includes a frame in which a spindle motor and an optical pickup are installed, and at least one helmholtz resonator that is installed in the frame to reduce noise of a particular frequency determined by a volume of a resonating tube and a length and diameter of a neck of the resonator, where the helmholtz resonator may be constructed to be united with the frame.

Abstract: A disk driving apparatus includes a base chassis which mounts thereon a spindle motor to rotatably drive a disk, and a pickup device to at least record information on or reproduce information from the disk rotated by the spindle motor while moving in a radial direction of the disk. Preferably, the base chassis includes a plurality of dynamic vibration absorbers each having an elastic member fixed to the base chassis and a dynamic vibration absorption pendulum plate supported by the chassis through the elastic member, and the plurality of dynamic vibration absorbers have different resonance frequencies each other within a frequency range of vibration of the base chassis which is generated in a utilized rotation speed range of the spindle motor.

Abstract: The present invention discloses an optical disk drive comprising a traverse, a traverse frame, a chassis and a stopper. The traverse frame is disposed on the chassis. And one end of the traverse is disposed on the chassis and the other end is disposed on the traverse frame. The stopper includes a protruded arm and an extended arm extended from the protruded arm. The protruded arm is integrated with the traverse by sheet metal forming and the extended arm is disposed above the traverse frame. The extended arm of the stopper is interfered with the traverse frame when a heavy shock is applied to the optical disk drive. Therefore, the optical disk drive including the stopper can prevent the separation between the traverse and the traverse frame without screws when a sudden hit is applied thereto.

Abstract: The position of an optical pickup with respect to a disk is maintained accurately by preventing the free end portion of a cantilever movable member from being displaced lower than its proper position during the rotation of the disk even if the movable member is heavy to have improved vibration characteristics. There are provided a movable member 4, a chassis 1, a clamp mechanism 3, and a cam mechanism 5. The cam mechanism 5 includes a shift lever 51 connected to the free end portion of the movable member 4 via elastic bodies 42 and a cam main body 55. Positioning means 8 is composed of a protrusion 53 on the shift lever 51, a stepped engaging surface 15 for supporting the protrusion 53 thereon, and a guide mechanism 71. There is also provided anti-positioning means 9 for disengaging the protrusion 53 from the engaging surface 15.

Abstract: A vibration damping means (30) for an optical reproducing/recording apparatus (100) includes a first damper (4), and a second damper (5) received in the first damper. The first damper has a damp coefficient adapted to absorb vibrations generated due to the spindle motor rotating. The first damper includes first and second engaging portions (41, 42) at opposite ends thereof, and a deformable portion (43) between the first and second engaging portions. A flange (45) extends from an interior surface of the deformable portion. The second damper defines a groove (52) engagingly receiving the flange of the first damper. If the apparatus sustains an impact or shock, the first and second dampers are deformed together. The overall damp coefficient of each damping means equals the sum of the damp coefficients of the first and second dampers. This larger damp coefficient enables the damping means to satisfactorily absorb the large intensity vibration.

Abstract: Disclosed is a disc device of which main body is accommodated within a housing. Engaging pieces 19 are provided in the rear of two rear side supporting stands 14b and 14d on a bottom chassis 2a of a housing 2. Each of the engaging pieces 19 is formed in an L-shape and is composed of a vertical plate 19a integrally provided in the rear of the rear side supporting stands 14b or 14d on the bottom chassis 2a to project vertically therefrom and a horizontal plate 19b bent at right angle at the distal end of the vertical plate 19a and extending to the above of each supporting stand 14b or 14d. Front side supporting stands 14a and 14c are formed with a screw hole 1.

Abstract: The present invention reduces contact noise between a turntable and a clamper without increasing the number of components. Spring pieces are formed by forming slit grooves in the corners of a support plate. When the support plate is secured by screws to bosses of a frame, the spring pieces formed in the four corners of the support plate are elastically contacted with the frame, with the support plate slightly floated from the frame. Thereby, vibration transmitted to the support plate from the clamper is absorbed by the spring pieces, thus suppressing noise caused by the vibration transmitted to the support plate.

Abstract: A disk device (10) comprises a case (11) for supporting the entire disk device (10), a base chassis (12) on which a spindle motor (21) for rotating the disk is set, a counterweight (13) for absorbing vibration of the base chassis (12), and a plurality of elastic bodies (14a-14d) for mutually supporting the case (11), the base chassis (12) and the counterweight (13). The case (11), the base chassis (12), and the counterweight (13) are supported by the common elastic bodies (14a-14d). As a result, there can be provided the dynamic vibration absorber in which the number of parts is not increased and a cost can be reduced, and the optical disk device (10) using the dynamic vibration absorber.

Abstract: A position adjustment method includes forming a plurality of bores on a tray, forming a plurality of through holes in a mounting plate corresponding to the bores on the tray, installing a plurality of screws into the through holes, and threading a plurality of nuts onto the screws, so as to fasten the screws to the mounting plate. The method also includes threading the screws into the corresponding bores so as to fasten the mounting plate to the tray and adjusting depths of the screws in the bores so as to adjust the position of the mounting plate relative to the tray.

Abstract: An easily manufacturable optical disc drive that provides for accurate writing and reading of information signals to and from a disc loaded therein by maintaining the horizontal balance of its base during operation, and that provides for smooth loading and unloading of a disc. The optical disc drive includes a base formed of a single metal plate of 1.4–1.8 mm thickness. Major components of the base (i.e., a disc rotation driving mechanism, an optical pickup and a pickup feeding mechanism) are disposed on the base in such a way that the total weight of these components is nearly evenly distributed on the base. The optical pickup is adapted to move across an optical disc between its inner and outer circumferences, while the optical disc is rotated by the disc rotation driving mechanism. The base is supported by a plurality (i.e., at least three) of supporting members, each with an elastic support piece.

Abstract: A car-mounted disc player with an elastically supported drive unit including a turntable and a pickup; a clamper-supporting member rotatably supporting a clamper; a clamp mechanism for activating the clamper-supporting member to move toward or away from the drive unit so as to clamp or unclamp a disc between the turntable and the clamper; a lock mechanism for bringing the drive unit in a locked state or an unlocked state with respect to the chassis; and a change-over mechanism for activating the clamp and lock mechanisms. During change-over operations of the change-over mechanism for activating the clamp and lock mechanisms, the change-over mechanism can be halted at a half-locked position where the drive unit is brought in the locked state while the disc is kept in a clamped state by the turntable and the clamper.

Abstract: A disc player that incorporates a single piece disc enclosure and a chassis section is described. The incorporation of the disc enclosure and the chassis section into a single piece eliminates the requirement for a separate damping system. As well as reducing the cost of manufacturing the device this also allows for the tolerance between the spindle motor and the disc enclosure to be precisely controlled so enabling miniaturization of the disc player.

Abstract: A disk drive apparatus has a main apparatus, a disk tray, a disk rotational drive unit, an optical pickup mechanism, a movable member, an elevator drive mechanism, a protrusion provided on the movable member, and a vibration-absorbing member provided on the protrusion. The disk tray causes a disk to move between a stored position and a drawn-up position relative to the main apparatus. The movable member supports the disk rotational drive unit and the optical pickup mechanism and is mounted to the frame of the main apparatus so that one end is free to rotate. The elevator drive mechanism causes the disk rotational drive unit and optical pickup mechanism to approach and move away from the disk, with the movable member free to move up and down. The protrusion extends toward one end of the movable member. The movable member is provided with the vibration-absorbing member.

Abstract: A CD changer mounted on a vehicle is supported in a floating manner to sufficiently damp vibrations and prevent a CD from skipping. Mounting plates and a pair of inner support plates are connected to each other at two front and two rear points by a first set of dampers, which buffer displacement of the mounting plates within a vertical plane relative to the inner support plates. The inner support plates and a pair of outer support plates opposite the inner support plates and supported on the base plates are connected to each other at two front and two rear points by a second set of dampers, which buffer displacement of the inner support plates within a vertical plane relative to the outer support plates. Suspended springs mounted between the mounting plate and the outer support plate exert a spring force to counteract the weight of the CD changer.

Abstract: A damper has a flexible portion formed of a rubber-like elastic material, such as thermoplastic elastomer, and a lid portion whose inner peripheral portion is formed of the rubber-like elastic material. The flexible portion and the lid portion are respectively equipped with mounting recesses into which mounting shaft members oppositely arranged on a casing of a reproduction device are inserted to hold the damper. With this construction, there is no need to mount the damper such that the lid portion faces the side plate or the bottom plate of the casing. Therefore, it is possible to reduce the thickness of the reproduction device, and to increase the degree of freedom in the design of the casing. Further, since the damper is supported in a floating state, it is possible to obtain a superior vibration damping effect whether the device is installed in a vertical or horizontal position.

Abstract: A disc drive includes a main body, a disc tray movable with respect to the main body between a loading position for loading an optical disc and an eject position, and a chassis on which a rotational drive mechanism for rotating a loaded optical disc is provided. The chassis is pivotally provided with respect to the main body about a pivotal axis near the rear end of the chassis so that the front end thereof can be displaced between a lowered position when the disc tray is ejected and a raised position for placing the optical disc on the rotational drive mechanism when rotating the optical disc. The disc drive prevents the chassis and/or the optical disc rotational drive mechanism from interfering or colliding with other elements of the disc drive.

Abstract: A dynamic vibration absorbing apparatus for an optical disk drive. The dynamic vibration absorbing apparatus has a first plate, a second plate provided either above or under the first plate, a plurality of first plate supporting devices, and a plurality of vibration absorbing dampers, in which each of the vibration absorbing dampers is provided between the first plate and each of the first plate supporting devices and between the first plate and the second plate.

Abstract: A dynamic vibration absorber for a disk player includes a deck base, a deck plate movably disposed on the deck base to support a spindle motor that spins a disk, a mass body disposed around the deck plate, and a flexibly changeable connection member that connects the deck plate and the mass body. A dynamic vibration absorber including the mass and connection member reduces vibration generated when the disk spins using a reciprocal action of the mass body and the connection member relative to the deck plate.

Abstract: A dynamic vibration absorbing apparatus for an optical disk drive. The dynamic vibration absorbing apparatus has a first plate, a second plate provided either above or under the first plate, a plurality of first plate supporting devices, and a plurality of vibration absorbing dampers, in which each of the vibration absorbing dampers is provided between the first plate and each of the first plate supporting devices and between the first plate and the second plate.

Abstract: An optical disc drive. The optical disc drive includes a main body, a motor, a vibration absorber, and a balance plate. The motor and the vibration absorber are disposed on the main body. The balance plate is disposed on the vibration absorber such that the center of gravity of the vibration absorber and the balance plate is substantially close to the center of gravity of the main body.

Abstract: The present invention provides a shock prevention device for use in a disc-reading device. The shock prevention device includes a damper for reducing the vibration generated by a rotation motor and a compression device for compressing the damper. When the rotation motor rotates at a high speed, the compression device does not compress the damper to reduce the transmission of the high-frequency vibration. When the rotation motor rotates at a low speed, the compression device compresses the damper to prevent the amplification of the low-frequency vibration.

Abstract: A CD changer mounted on a vehicle is supported in a floating manner to sufficiently damp vibrations and prevent a CD from skipping. Mounting plates and a pair of inner support plates are connected to each other at two front and two rear points by a first set of dampers, which buffer displacement of the mounting plates within a vertical plane relative to the inner support plates. The inner support plates and a pair of outer support plates opposite the inner support plates and supported on the base plates are connected to each other at two front and two rear points by a second set of dampers, which buffer displacement of the inner support plates within a vertical plane relative to the outer support plates. Suspended springs mounted between the mounting plate and the outer support plate exert a spring force to counteract the weight of the CD changer.