Abstract: In a recording disk drive apparatus including, a chassis including a chassis body, a spindle motor fixed to the chassis body to support and rotationally drive a recording disk, and a head supported on the chassis body to be movable on the chassis body in a radial direction of the recording disk so that an information is recorded into the recording disk and/or read from the recording disk through the head, a base member on which the chassis is supported, and an elastic member through which the chassis is supported on the base member so that a vibration transmitted from the chassis is absorbed at least partially by an elasticity of the elastic member, the chassis includes a counter member elastically supported on the chassis body with a spring constant for the counter member in which spring constant the counter member is elastically movable with respect to the chassis body.

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: A stabilizing part applying aerodynamic force to the recording medium so as to control disk axial runout of the recording disk and stabilize it; the stabilizing part includes a main stabilizing member for a recording/reproduction position with the recording/reproduction unit and an auxiliary stabilizing member for positions other than the recording/reproduction position; the auxiliary stabilizing member inclines the disk surface of the recording disk from a plane perpendicular to the rotational axis of the recording disk, and said main stabilizing member generates a positive or negative pressure in the recording disk rotation direction to cancel out inclination in the recording/reproduction surface of the recording disk.

Abstract: A holding apparatus for at least one storage medium has a housing in which a supporting structure is arranged. The supporting structure is in this case connected to the housing with vibration damping via a damping device. A storage medium is arranged in the supporting structure. The storage medium is bounded in a pressuretight manner from an external atmosphere. A cooling element is provided for cooling the storage medium.

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: An air flow generated during disk rotation is rectified to suppress disk vibrations and prevent the qualities of recorded and reproduced signals from being degraded. Notches 24 and 26 are formed on top edges of right and left side walls 22 and 22 of a frame 10. Opposite ends of a clamp holder 28 along its long side direction are fixedly mounted on the notches 24 and 26. Rectifiers of repetitive structures 32 and 34 having a wave shape as viewed in plan are formed on the clamper holder 28 on the plate portions 28a and 28b on both sides of a clamper 30 and at edges on the output side of an air flow generated during disk rotation.

Abstract: In an optical disk drive device, in order to reduce structural vibration noise and aerodynamic sound during high-speed revolution, a recess is formed at the deeper end. This recess is in a position axially symmetric to a hole for the movement of an optical head with respect to the axis of a spindle motor, and its size is substantially equal to that of the movement hole. This recess serves to suppress the vibration mode of a disk tray and the air flow between the disk and the disk tray. Noise is reduced even when the disk is turning at high speed.

Abstract: A disk drive reducing noise, including a disk tray sliding in and out of the disk drive and on which a disk is placed. A disk driving portion rotates the disk at a predetermined speed. A disk chucking apparatus holds the disk on the disk tray. A data recording/reproducing unit records data on the disk or reproduces data from the disk. An air guide plate is installed between an upper surface of the disk tray and an upper cover plate of the disk drive, parallel to the disk tray, and separates an air flow area. Air flow above the disk generated by the rotation of the disk is divided into turbulence under the air guide plate and turbulence above the air guide plate. Thus, the flow of turbulence is controlled by the air guide plate so that it does not collide with a front side portion of the disk drive. Also, because the velocity of turbulence of a free flow layer under the air guide plate that collides with the front side portion decreases, noise transmitted to the front side portion is reduced.

Abstract: A cushion assembly includes a retarding member, a support member and an urging member. The retarding member has a base portion and an upper portion formed with an upper end face, and is formed with a guiding hole extending inwardly and axially from the upper end face. The support member includes a support disc disposed above the upper end face of the retarding member, and a guiding post extending from the support disc into the guiding hole in the retarding member 4. The urging member is sleeved around the retarding member for urging the support disc upwardly and axially away from the retarding member.

Abstract: A transmitting device for a feeding mechanism of an information recording/reproducing apparatus includes an engaging member adapted to be engaged with a power source of the apparatus for power transmission, a fixing member adapted to be fixed to a pickup module of the apparatus, and a buffer member adapted to dampen shock due to collision. The buffer member includes at least two interconnecting portions which are deformable in a direction of movement of the pickup module, so shock due to sudden collision is effectively dampened.

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: A disk driving apparatus includes a base chassis supported in a cabinet through an elastic body, and equipped with a spindle motor to rotate and drive a disk and a pickup moving radially with respect to the disk rotated by the spindle motor. Preferably, the base chassis is provided with a dynamic vibration absorber including an elastic body fixed to the base chassis, and a pendulum plate supported in the base chassis through the elastic body, and the pendulum plate is displaced by external force applied to the cabinet and makes contact with the cabinet ahead of the base chassis.

Abstract: Light from a light source is led to a condensing lens by a light leading unit and is condensed onto an optical recording medium by the condensing lens. Light reflected from the optical recording medium is led to a light sensing device through a spot adjustment lens facing the light sensing device. Between the spot adjustment lens and the light sensing device, a cylindrical dustproof member is provided. The full periphery of an optical path extending between the spot adjustment lens and the light sensing device is covered with the dustproof member. It can prevent intrusion of a foreign matter such as dusts into the optical path extending between the spot adjustment lens and the light sensing device.

Abstract: Electronics are fitted in vehicles, such as boats, ships, trains, buses, lorries, normal cars etc. The electronic items are exposed to jolts and other non-uniform actions. Particularly with regard to jolts, electronic items or apparatuses in which there are also mechanical components are particularly exposed. This is particularly the case with CD players, CD-ROM players, hard disks and similar apparatuses, which besides very sensitive electronics also have very sensitive mechanics. To operate these installations optimally, dampening vibration transmission from the vehicle/ship/train/bus/car to the electro-mechanical component is achieved with a vibration damper having two springs arranged in two mutually perpendicular planes. One plane is parallel with the base. A first spring is fastened to the base. A second spring is fastened to the vibration sensitive item. The two springs are mutually connected.

Abstract: An optical disk drive, including a body, a tray, a panel, and at least one soundproof member. The tray is moveably disposed in the body. The panel is connected to the body, the connection therebetween is sealed by the least one soundproof member, thereby lowering noise produced by high rotational speed of the disk drive.

Abstract: A system, method, and apparatus for solving flow-induced track misregistration (TMR) problems in hard disk drives (HDD). Boundary layer manipulation techniques are applied to the airflow in the HDD, such as boundary layer suction with slots or holes, and wall damping techniques, such as an open honeycomb seal and Helmholtz resonators. These flow-conditioning solutions reduce the turbulence intensity throughout the HDD to reduce TMR. These solutions achieve these goals while minimizing increases in the running torque needed to overcome their inherent rotational drag.

Abstract: According to this invention, there is provided a molding method and apparatus which increase the gas permeation speed in obtaining a foamed resin molded product by letting a gas permeate a molten resin material.

Abstract: In an optical disk apparatus in accordance with the present invention, a tilt chassis (3, 201) to which a main shaft (6) and a sub shaft (7), being parallel with each other and serving to guide the movement direction of an optical pickup (50), are secured is disposed rotatably with respect to a traverse chassis (4) to which a spindle motor (2) is secured, and the tilt chassis (3, 201) is configured so as to be tilt-adjustable with respect to the traverse chassis (4) by tilt adjustment means having two tilt adjustment portions (30, 31), whereby tilt adjustment work for adjusting the movement face of the optical pickup so as to be parallel with the recording face of an optical disk is made easy.

Abstract: A disk drive that includes a head disk assembly (HDA) comprising a base having a top base surface and a bottom base surface, and a top cover secured to the top base surface; a printed circuit board assembly (PCBA) in communication with the HDA and comprising a first PCBA surface and a second PCBA surface wherein the first PCBA surface faces the bottom base surface; and a bottom cover fastened to and substantially covering the bottom base surface. The invention further includes an acoustic damping shield assembly placed between the bottom cover and the second PCBA surface, wherein the acoustic damping shield assembly comprises first and second acoustic absorption layers having major surfaces; an acoustic barrier layer placed in between the major surfaces; and the major surfaces and the acoustic barrier layer are fixed in a stacked relationship.

Abstract: A disk drive that includes a head disk assembly (HDA) having a disk drive base, and a printed circuit board assembly (PCBA) in communication with the HDA. The invention further includes an acoustic damping assembly placed between the disk drive base and the PCBA. The acoustic damping assembly includes first and second acoustic absorption layers having major surfaces, an acoustic barrier layer placed in between the major surfaces, and the major surfaces and the acoustic barrier layer are fixed in a stacked relationship.

Abstract: A disk drive including a head disk assembly in communication with a printed circuit board assembly, and further includes a disk drive base and a disk drive cover assembly collectively housing a head stack assembly and a data storage disk mounted on a spindle motor assembly for rotating the storage disk. The disk drive cover assembly further includes first and second substantially-planar rigid members having major surfaces, a compressible member of a foam composition placed in between the major surfaces wherein the compressible member is characterized by an unconstrained thickness d1, and wherein the major surfaces and the compressible member are fixed in a stacked relationship to compress the compressible member to a thickness less than d1. The head disk assembly further includes structure for fixing the disk drive cover assembly to the head stack assembly and the spindle motor assembly.

Abstract: A disk recording and/or reproducing apparatus includes a mechanical deck having a disk receiver with a disk carrying unit for carrying a disk, a disk recording and/or reproducing section for recording and/or reproducing the disk received in the disk receiver, and an outer case housing the mechanical deck. A relaxation mechanism and a lock mechanism are disposed between the mechanical deck and the outer case. The relaxation mechanism prevents vibration from being transmitted mutually between the mechanical deck and the outer case. The lock mechanism locks the mechanical deck to the outer case in such a manner as to oppose a relaxing operation of the relaxation mechanism. Thereby, operational vibration, noise and the like caused to the mechanical deck during recordation and/or reproduction can be prevented from being transmitted to the outer case's side.

Abstract: A disk drive includes a disk drive base and a spindle motor including a spindle motor hub rotatably coupled to the disk drive base. The disk drive further includes a disk having a disk surface disposed about the spindle motor hub. The disk drive further includes a cover attached to the disk drive base with the spindle motor and the disk enclosed within the cover and the disk drive base. The disk drive further includes a disk plate. The disk plate includes a plate body coupled to the disk drive base between the disk and the cover. The plate body extends substantially along the disk surface. The disk plate further includes a damping member disposed upon the plate body. The damping member includes a stiffener layer and a damping layer formed between the stiffener layer and the plate body for mitigating vibration of the plate body.

Abstract: An optical compact disk drive includes a housing with a top cover, a disk-supporting tray mounted in the housing for supporting a compact disk thereon and cooperating with the top cover to define a gap therebetween, and an acoustic-and-vibration attenuator mounted in the gap to divide the gap into a plurality of angularly spaced apart compartments around a central axis that passes through a center of the compact disk.

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 data storage device includes a housing in which is mounted a data storage unit, such as a hard disk drive. Pads serve as shock mounts at the corners of the data storage unit and separate the data storage unit and the housing. A flex circuit electrically couples the data storage unit and a connector at the front of the device. The flex circuit has, e.g., an “N” shape configuration, which advantageously provides flexibility in many directions. The data storage device may convert the number of pin connections from the data storage unit to a different number of pin connections. A docking module that receives the portable data storage device may also convert the number of pin connections from the data storage device to a different number of pin connections used by a host system. The docking module includes a slide for receiving and ejecting the portable data storage device.

Abstract: An optical compact disk drive includes a housing and a mounting seat with a disk-supporting tray that has opposite front and rear peripheral portions and that is formed with a recess between the front and rear peripheral portions and an elongated opening extending from a center of the recess to the rear peripheral portion. A pair of front air-communicating openings are formed in the front peripheral portion, and at least a rear air-communicating opening is formed in the rear peripheral portion. Air is permitted to flow from a bottom side to a top side of the disk-supporting tray through the front and rear air-communicating openings.

Abstract: The invention relates to a liquid-filled damper for a shock-sensitive apparatus, comprising a base part and an elastic cover part.

Abstract: A disc rotating apparatus includes a turntable for placing thereon a disc such as CD, DVD. The disc is clamped by the turntable and the disc holding frame. The holding frame is formed, at its main body, with an annular groove. The annular groove is circumferentially partitioned by a plurality of partition walls to thereby provide a plurality of accommodating portions. Each of the accommodating portions accommodates therein one or two or more steel balls. Due to rotation of the turntable or disc, each steel ball is displaced within the accommodating portion, thereby correcting for an unbalanced state wherein a center of gravity of the disc is deviated from an axis of a rotary shaft of turntable.

Abstract: When the apparatus is turned on, the rotation shaft of a solenoid and hence an eccentric cam is rotated through a predetermined angle and a semi-fixing side of an HDD bracket is pushed down to a latching flat section of a stepped stud whereby the bracket is fixed to a chassis through the stepped stud.

Abstract: A fixing structure is disclosed in which a first metal board (such as a weight board) is fixed to a second metal board (such as a baseboard) without using screws. When an eccentric rotor provided to the second metal board is rotated by a screwdriver, the eccentric rotor pushes against an aperture edge provided in the first metal board, thereby sliding the first metal board in relation to the second metal board. The first metal board and the second metal board are locked by hooks provided on the second metal board, the hooks locking against additional aperture edges provided in the first metal board.