Abstract: A hard disk drive including a base deck with a base member and side walls extending from the base member. The side walls include a non-metallic material and include a structure made from the non-metallic material. The structure is arranged to dampen vibration. The side walls can be formed using an additive manufacturing process.

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: A disk drive according to the present invention includes: a mechanical chassis; a pickup for reading and/or writing information from/on a disk storage medium; a rotation drive section with a turntable to mount and rotate the storage medium thereon; a pickup supporting member having a bottom portion for supporting the pickup and the rotation drive section and a standup wall that stands upright from the bottom portion toward the turntable, the pickup supporting member being supported on the mechanical chassis so as to turn around an axis of rotation that is defined through the standup wall; and a pickup raising/lowering portion, which is provided for the mechanical chassis in order to drive the pickup supporting member to either a first position in which the pickup is ready to perform a read or write operation on the storage medium that is mounted on the turntable or a second position in which the turntable has been retracted so as to avoid contact with the storage medium being inserted or ejected.

Abstract: The present invention relates to a method of simulating the deformation of a viscoelastic material in which filler is blended to a matrix made of rubber or resin, the method including the steps of dividing the viscoelastic material into a finite number of elements to form a viscoelastic material model, a step of performing deformation calculation of the viscoelastic material model based on a predetermined condition, and a step of acquiring a necessary physical amount from the deformation calculation, where the step of dividing the viscoelastic material into a finite number of elements includes a step of dividing at least one filler into a finite number of elements to form a filler model, and a step of dividing the matrix into a finite number of elements to form a matrix model.

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 disk apparatus has a chucking mechanism including a receiving member and a disk pressing member respectively provided in an upper position and a lower position with respect to a disk tray. One longitudinal end portion of a drive chassis on which the disk pressing member is disposed is attached to a frame via first buffer members. A free end of the drive chassis is joined to a movable member, which is moved up and down as the movable member is guided by a guide hole of a guide plate provided in a position opposed to the free end of the drive chassis, via a second buffer member made of vibration-proof rubber. The movable member is formed of a hollow cylindrical shaft member, and a second buffer member is interposed in a press fitted state between the shaft member and the free end of the drive chassis.

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.