Abstract: Disclosed is an optical pickup actuator capable of regulating quantity of a leakage magnetic flux to minimize a phase change of an objective lens. The optical pickup actuator according to the present invention comprises a moving part having an asymmetric structure with respect to the objective lens, and a driving force of the moving part is generated by a magnetic circuit constituting of permanent magnets, a yoke and coils. In the vicinity of the magnetic circuit, a sub coil portion of the focusing coils and a magnetic flux-controlling member are provided for interlinking with a leakage magnetic flux generated from the magnetic circuit and for controlling quantity of the so generated and interlinking leakage magnetic flux, respectively.

Abstract: A disk device includes a disk playing section provided with a pickup reading recorded information on a disk and a rotatable turntable mounting a disk, a damper section supporting said disk playing section to float and a rotatable base section which disposes said disk playing section through said damper section and which forms an engaged section by an engaging action and an engaging section which engages with an engaged section. The invention is further characterized in that when said base section is rotated to a disk playing position, said engaged section is adapted to engage with said engaging section.

Abstract: An e-mail processing application executable on a computer station having a video display unit (VDU) searches a received e-mail for one or more words, phrases, and addresses for comparison with stored words, phrases and addresses in a stored table, and upon finding a match in the stored table, inserts one or more of words, phrases, or addresses associated in the stored table with the words, phrases or addresses from the received e-mail in any reply to the received e-mail. In a preferred embodiment a “send to” address in a received e-mail triggers automatically one or both of a particular “from” and “reply to” address in any response to the received e-mail. In an alternative embodiment, a “send to” address in a received e-mail, as a result of a table look-up, automatically prepares and sends a new e-mail identical to the received e-mail except for a new “send to” address retrieved from the stored table.

Abstract: A connecting member connects a pair of holder plates toward the end of the holder plates at the recessed end in the direction in which the disk is inserted. By forming the holding member holding disks using three pieces, there is less deformation causes by high temperatures compared to integrally formed units. Also, since this connecting member only serves to connect the pair of holder plates, a thin rod-shaped connecting bar can be used. This allows the clearance between the disks held toward the back of the device and the rear panel to be minimized, thus contributing to a reduced depth dimension for the device.

Abstract: A disk clamping device for a disk drive having a hub insertable into a central hole of a disk which is capable of preventing the slip of the disk, even in a high speed rotation of the disk, by increasing the frictional force between a hub and the disk, wherein the disk clamping device includes a plurality of clamping grooves formed at the hub in a radial direction and respectively placed at regular angles and intervals centering around the hub, a plurality of springs respectively inserted into the plurality of clamping grooves, a plurality of balls respectively inserted into the plurality of clamping grooves, pushed toward the outer circumference of the hub by the plurality of springs and contacting to the disk when the hub is inserted into the central hole of the disk and a fluid provided inside the plurality of clamping grooves in order to increase the frictional force between the plurality of balls and the disk in accordance with the rotation of the disk and the hub.

Abstract: A head lifting device includes a head-supporting member, a magnetic or optical head supported by the head-supporting arm and a base member for supporting the head-supporting arm. This arm is formed with at least one hole, while the base member is provided with a protrusion coming into contact with the inner wall of the hole. The head-supporting arm and the base member are held together by an elastic clip, with the protrusion held in sliding engagement with the hole.

Abstract: A slider head assembly is provided which includes a slider head for reading/writing data on the surface of a rotating disc. The slider head is disposed in spaced relationship with respect to the disc for read/write (R/W) operations. The slider head assembly is comprised of a body portion having an essentially planar surface positioned to co-act with the surface of the disc with a proximal end and a distal end. The proximal end or trailing slider surface of the head assembly has a read/write element thereat. The distal end or leading slider surface of the assembly has an actuation device mounted thereon, having a surface the position of which can be modified by an external signal to change the position of the head with respect to the planar or air bearing surface (ABS) of the head assembly. This will change the characteristics of the boundary layer of air between the rotating disc and the head, causing the head assembly to move closer to or farther from the rotating disc when actuated by the external signal.

Abstract: A magnetic recording head includes a zero throat formed on a bottom pole layer and a dielectric layer formed over a portion of the bottom pole layer and over a portion of the zero throat. A bottom pole extension, a gap layer, and a top pole extension are plated in a pole tip region of the recording head so that the dielectric layer separates the plated layers in the pole tip region from the zero throat. The dielectric layer reduces the magnetic flux leakage between a bottom pole extension and a top pole extension of the recording head.

Abstract: A connecting portion of the external side FPC board connected to a control circuit provided outside of a magnetic head assembly and connecting terminals of arm side FPC boards respectively connected to magnetic heads are overlapped with an anisotropic conductive tape having anisotropic conductivity in the direction of thickness in between. The anisotropic conductive tape is applied pressure between the connecting portion and the connecting terminals with heating to a temperature of, for example, 150° C. and is set. As a result, the connecting portion and the connecting terminals are connected. The anisotropic conductive tape has anisotropic conductivity only in the direction of thickness so that conduction of wirings adjacent each other is prevented although a plurality of wirings is formed on the connecting portion and the connecting terminals.

Abstract: In the disk drive unit of the present invention, an eject button for ejecting and retracting a tray can be easily pushed while the tray is ejected, and the tray can be ejected and retracted by same action. The disk drive unit comprises: a main body; a tray for holding an optical disk, the tray retracted into and ejected from the main body; a moving mechanism for moving the tray, the moving mechanism including a motor for retracting the tray into and ejecting the same from the main body; and an eject button actuating the moving mechanism so as to eject the tray into and eject the same from the main body, the eject button provided in a front face of the tray.

Abstract: A connecting member connects a pair of holder plates toward the end of the holder plates at the recessed end in the direction in which the disk is inserted. By forming the holding member holding disks using three pieces, there is less deformation causes by high temperatures compared to integrally formed units. Also, since this connecting member only serves to connect the pair of holder plates, a thin rod-shaped connecting bar can be used. This allows the clearance between the disks held toward the back of the device and the rear panel to be minimized, thus contributing to a reduced depth dimension for the device.

Abstract: A CD Card for packaging card like information and digital information in the basic dimensions (length and width) of a business, credit or collectors card. The CD Card is made up of one, two, or three major components. The first component is a small compact disc with dimensions small enough to be contained within the typical dimensions (length and width) of a business card, credit card, or collectors card. The second component is a container shaped like a business, credit, or collectors card in length and width, but with a depth large enough to hold the small compact disc and adaptor (if required) discussed subsequently. The third component is an adaptor designed to position the small compact disc of the first and third embodiments of the present invention correctly in standard CD drives. A second embodiment of the small compact disc may not require an adaptor or case.

Abstract: A disk device providing disk storage and disk playing capabilities. The disk storage being provided along a vertical column. Upon the retrieval of a desired disk from the disk storage, the desired disk is rotated around the column so that it may move up and down the column into a playing position. Upon reaching the playing position the disk is provided to a disk playing device for playing the disk.

Abstract: In a hydrodynamic bearing according to the present invention a fixed shaft has different diameter sizes by positions so that overflow or splashing of lubricant out of the apparatus is prevented due to a centrifugal force during high-speed rotation, and lubricant reservoirs are provided in narrower clearances and in wider clearances so that the lubricant is induced to move toward lubricant reservoirs in narrower clearances due to surface tension while the hydrodynamic bearing is in stop, therefore overflow of the lubricant is prevented at the time of starting up.

Abstract: A MD loading mechanism for a multidisk MD reproducing apparatus capable of storing a plurality of MDs and of reproducing information recorded on the plurality of MDs successively comprises: a plurality of cartridge holders for holding MD cartridges therein, respectively; a MD cartridge storage unit for storing the plurality of cartridge holders therein in a stack so that the back end surfaces of the MD cartridges held within the cartridge holders can be seen from outside, provided with a plurality of insertion slots through which the MD cartridges are inserted in the cartridge holders and cartridge holder locking means for locking the cartridge holders within the MD cartridge storage unit; and a cartridge holder transfer means for transferring the cartridge holder holding a desired MD cartridge from the MD cartridge storage unit to the MD reproducing apparatus.

Abstract: An objective lens driving device in which an objective lens is driven by a magnetic circuit having a focusing coil and a tracking coil. The objective lens driving device is provided with a biaxial movable body that is supported by a support shaft so as to be slidable in the axial direction of the support shaft and rotatable about the support shaft, an objective lens held by the biaxial movable body, a plurality of focusing coils that are provided on the biaxial movable body so as to be symmetrical with respect to the support shaft, a tracking coil or coils that are provided on the biaxial movable body in a number that is smaller than the number of focusing coils, and magnets that are opposed to the focusing coils and the tracking coil or coils, respectively. A plurality of first magnetic circuits are formed by the focusing coils and part of the magnets that are opposed to the respective focusing coils.

Abstract: A data transducer having an air bearing surface is used to reduce thermal pole tip protrusion. The data transducer includes a write via and a top pole having one end adjacent the air bearing surface and an opposite end contacting the write via. The yoke extends from the write via in two directions towards the air bearing surface and is recessed from the air bearing surface. The yoke has a first end and a second end. The data transducer includes a shared pole adjacent the air bearing surface and co-planar to the yoke wherein a gap is located between the shared pole and the yoke. A shared pole extension extends between the shared pole and the first and second ends of the yoke.

Abstract: An optical head driving mechanism is applied to an optical disc driver that has a base plate, a pair of guide rods and an optical module movably mounted on the guide rods. The driving mechanism includes a base, a movable member, a piezo-actuator and at least a resilient member. The piezo-actuator and the movable member generate proceeding waves at the rim of the piezo-actuator and move the optical module along the guide rods when the piezo-actuator activates.

Abstract: The inventors have found that by changing the outer wall shape of at least disk spacer, the air flow of the relevant inner region is disrupted, causing particulate adhesion to be minimized. The air flow disruption acts to blow more air through the inner region, effectively moving particles away from the inner region rather than retaining these particles. The inventors call disk spacers with outer wall shapes disrupting inner region air flow, screw-type spacers.

Abstract: In a spin valve type transducer including two magnetic shield layers, a patterned magnetoresistance element is in direct contact with one of the magnetic shield layers. A permanent magnet layer and an electrode layer are formed on the sides of the patterned magnetoresistance element.