Abstract: A data storage device includes an enclosure case and a circuit board attached to an outer surface of the enclosure case, the enclosure case containing a spindle motor and a circular movement actuator, the spindle motor being for rotating a storage medium, the circular movement actuator being for controlling a position of a read and write head for reading data from the storage medium and for writing data to the storage medium, the circuit board having an interface cable connector at one end portion thereof for establishing a connection to a host. The circuit board is located between the interface cable connector and the spindle motor, and is attached to the enclosure case by use of a plurality of fastening members. An acceleration sensor is attached to the circuit board next to the fastening members for detecting vibrations applied to the data storage device in a rotation direction in a plane along the circuit board.

Abstract: The present invention provides a magnetic disk device which firmly fixes the yokes of a rotary actuator between a base and a cover. The yoke can be made compact and the movable range of the rotary actuator can be wide. An attaching screw attaches a first yoke to a base and fixing screws passing through the second yoke and the first yoke from a cover are screwed to the base.

Abstract: A data storage device includes an enclosure case and a circuit board attached to an outer surface of the enclosure case, the enclosure case containing a spindle motor and a circular movement actuator, the spindle motor being for rotating a storage medium, the circular movement actuator being for controlling a position of a read and write head for reading data from the storage medium and for writing data to the storage medium, the circuit board having an interface cable connector at one end portion thereof for establishing a connection to a host. The circuit board is located between the interface cable connector and the spindle motor, and is attached to the enclosure case by use of a plurality of fastening members. An acceleration sensor is attached to the circuit board next to the fastening members for detecting vibrations applied to the data storage device in a rotation direction in a plane along the circuit board.

Abstract: A hard disk device with air stabilizing wings which enable the straightening of the airflow between disks and the suppression of the vibration of disks and actuators.

Abstract: The present invention is an after-assembly shroud in a magnetic disk drive. The shroud of the present invention is attached to a housing after assembly of the disk drive and actuator near the circumferential edge of the disk. The disk is attached to the housing of a magnetic disk drive so that it is rotatable with respect to the housing. The invention relates to a fabrication method for the magnetic disk drive. The assembly method is adapted for attaching the shroud to the housing of the disk drive after assembly and is performed according to novel assembly sequence. The shroud of the present invention reduces disk flutter due to turbulent air flow, and track positioning precision can be enhanced.

Abstract: To provide a magnetic disk apparatus in which an outline of a seal for hermetically sealing is identical with that of a cover and base having steps at the periphery thereof. In a sealed magnetic disk apparatus in which a cover and base having steps at the periphery thereof are joined together via a seal, two slopes 48 and 50 are provided, in a turned or stairs-like form, at each step portion at the periphery of a cover 60 and a base 40. The first slope 48 descends from the periphery toward the inside, and the second slope 50 connecting to the first slope descends from the inside toward the periphery. The slopes of the cover are provided to mate with those of the base, respectively. A seal 70 has an outline which is substantially identical with that of the cover 60 and the base 40 and includes projections 72 and 74 covering the slopes.