摘要:
Disclosed herein is a rotary actuator having a retractor mechanism which can retract magnetic heads to a CSS zone of magnetic disks only by a mechanical bias force in stopping a magnetic disk drive at any cylinder position of the heads. The rotary actuator includes an actuator arm assembly rotatably mounted on a base of the magnetic disk drive, an FPC mounted on one side surface of the actuator arm assembly, and a magnetic circuit constituting a voice coil motor by combination with a moving coil supported to the actuator arm assembly. A retractor plate is fixed to the actuator arm assembly at a position opposite to a mounting position of the FPC with respect to the center of rotation of the actuator arm assembly. The retractor plate functions to retract the magnetic heads to the CSS zone of the magnetic disks by magnetic reaction with a magnetic flux in the magnetic circuit.
摘要:
An electrode for an electrochemical capacitor comprising an electrode, a collector, an electrolyte solution and a separator, wherein said electrode contains at least a conductive material and a polyimide silicone expressed by the following general formula (1) having an average molecular weight of 5,000-150,000 expressed by general formula (I).
摘要:
In a display apparatus for performing multiple-level gradation display, the number of connection terminals of the drive circuit thereof is reduced so as to reduce the number of analog switches in the drive circuit. First and second reference voltages which rise stepwise with time are supplied to analog switches that are selectively turned on and off in accordance with gradation display data elements. Among potentials included in the changing first and second reference voltages, a potential corresponding to gradation display data is supplied to the pixel electrodes via source lines to perform gradation display in accordance with the gradation display data.
摘要:
A magnetic circuit structure in a rotary actuator which can reduce the inductance of a coil while negligibly reducing a magnetic flux density between gaps. The magnetic circuit structure includes an E-shaped main yoke formed by integrally connecting a curved inner yoke, a curved center yoke, and a curved outer yoke. The E-shaped main yoke is manufactured by stacking a plurality of rolled steel plates. An inner magnet is mounted on the outer circumferential surface of the inner yoke opposed to the center yoke, and an outer magnet is mounted on the inner circumferential surface of the outer yoke opposed to the center yoke. A side yoke is magnetically attached to the open end of the E-shaped main yoke. A through hole extending in parallel to the axis of rotation of the rotary actuator is formed at a circumferential central portion of the center yoke.
摘要:
A tape carrier package of the invention includes: an insulating film having a device hole; a conductor pattern formed on the insulating film; and conductor leads electrically connected to the conductor pattern and projected inward beyond the edge of the device hole, and the conductor leads is electrically connected to electrode pads of a semiconductor chip. In this arrangement, the electrode pads of the semiconductor chip are arranged in at least two rows which are parallel to opposite two sides of the semiconductor chip, the two opposite rows of pads are disposed closer to the center of the two rows than to the edge of semiconductor chip, and the element-forming surface of the entire semiconductor chip containing the region between the insulating film and the semiconductor chip, is sealed with a sealing resin, except the part of the electrode pads.
摘要:
A motor in which drive coils are arranged in an axial direction of a cylindrical rotor magnet of which an outer peripheral surface is magnetized, the drive coils are cylindrical bodies having respectively center holes into which a rotor shaft is to be inserted, curling cases each of which is formed by bending a flat plate made of a magnetic material into a tubular shape, surround the drive coils, respectively, and surround a cylindrical surface of the rotor magnet with a predetermined gap therebetween, and portions of the surfaces of the curling cases, which face the drive coils associated therewith, serve as yoke parts, respectively, while other portions of the curling cases, which face the rotor magnet, are formed to be pole teeth, and also serve as yoke plates.
摘要:
A motor comprises a casing made of magnetic material for housing a rotor and a coil wherein side surfaces of the casing have openings. The openings are closed by the magnetic plates that are thinner than the thickness of the material of the casing.
摘要:
Disclosed herein is a magnetic disk drive including a spindle shaft fixed to a base, a coil mounted on the spindle shaft, a spindle hub rotatably mounted on the spindle shaft, a magnetic disk fixed to the spindle hub and having a plurality of tracks, a permanent magnet fixed to the spindle hub, a magnetic head for reading/writing information from/to the magnetic disk, and an actuator for moving the magnetic head across the tracks of the magnetic disk. The magnetic disk drive further includes a cover fixed to the base and having a hole at a position corresponding to the spindle shaft, a first metal washer placed on the cover at a portion around the hole, a second metal washer for sandwiching the cover at the portion around the hole in cooperation with the first metal washer, and a screw for securing the first and second metal washers to the spindle shaft.
摘要:
A display driving device of the present invention includes: a group of source drivers having a bidirectional shift register and made up of a plurality of serially connected source drivers; and a start pulse signal as a single supply line, which is branched into two systems for supplying an externally supplied start pulse signal to each source driver, wherein the two systems of the branched single supply line are respectively connected to input terminals of the start pulse signal of source drivers at the both ends of the group of source drivers, and a transfer direction of the start pulse signal is switched with the single supply line by making one of the two systems of the start pulse signal conductive while making the other non-conductive within the group of source drivers.
摘要:
Disclosed is a magnetic disk apparatus constructed to reduce a track positional deviation of a magnetic head. This magnetic disk apparatus includes a rotary mechanism for rotating the magnetic disk and a rotary type actuator, provided with the magnetic head at its front end, which magnetic head has a write head and a read head, for moving the magnetic head in such a direction as to traverse tracks of the magnetic disk by making rotations about a rotary shaft. A distance A from the center of rotation of the rotary type actuator to the magnetic head is set equal to or larger than a distance B from the center of rotation of the rotary type actuator to the center of rotation of the magnetic disk. Even when separating a write element and a read element, the track positional deviation of the magnetic head can be reduced. This magnetic disk apparatus includes an enclosure accommodating both of a rotary mechanism and the rotary type actuator and having a base taking such a configuration that one side surface thereof is opened and a cover fitted in the base, wherein a side for separating the base and the cover is formed at a slant to a long side of the apparatus. This construction makes it possible to enhance a rigidity of the enclosure and reduce the track positional deviation of the magnetic head.