41results about "Apparatus for flat record carriers" patented technology

A base plate includes a support part, a bottom plate part, and a wall part. The wall part includes a first wall part and a second wall part above the first wall part. The first wall part includes a first wall surface and a support surface spreading from an upper end of the first wall surface to a radially outer side. The second wall part includes a second wall surface and a recess recessed to the radially outer side from the second wall surface. The recess is defined by a space enclosed by a recess wall surface located on the radially outer side of the second wall surface and extending upward from the support surface, a recess top surface connecting from an upper end of the recess wall surface to the second wall surface, and a recess support surface facing the recess top surface in an axial direction.

According to one embodiment, a disk device includes a magnetic disk, a housing, a first filter unit, and a second filter unit. The housing is provided with an internal space and is provided with a first through hole. The first filter unit includes a first case with a first accommodation space which is in communication with the first through hole, a first adsorbent in the first accommodation space, and a first filter. The first accommodation space is in communication with the internal space through the first filter. The second filter unit includes a second case with a second accommodation space which is separated from the first accommodation space, a second adsorbent in the second accommodation space, and a second filter. The second accommodation space is in communication with the internal space through the second filter.

According to one embodiment, a disk device includes a housing with a bottom wall, magnetic disks supported on a hub of a motor, a printed circuit board provided on an outer surface of the bottom wall, and a wiring board attached on the outer surface of the bottom wall. The bottom wall includes a recess formed in the outer surface, a step located on border between the outer surface and the recess, and through holes opened to the recess. The wiring board includes one end portion disposed in the recess and connection pads on the one end portion, connected to lead wires of a coil. An adhesive is filled into the recess and the through holes, and covers the one end and a solder joint and seals the through holes.

To provide a disc device capable of suppressing influence of external noise.SOLUTION: A disc device 1 includes: a base 17 of a housing 3 which stores a disc 9 of the disc device 1; a first cover 19 which is fitted on the base 17 and closes a first space part 23 storing the disc 9 in the housing 3; a second cover 21 which is fitted on the base 17 outside of the first cover 19; and a gasket 25 which is interposed between one or both of the first cover 19 and the second cover 21 and the base 17. The one or both of the first cover 19 and the second cover 21 are resin parts which are at least partially composed of resin in a plan view.SELECTED DRAWING: Figure 1

To provide a magnetic recording device capable of stable recording operation.SOLUTION: A magnetic recording device 150 includes a magnetic recording medium group 20 and a magnetic head group 30. The magnetic recording medium group includes a first magnetic recording medium 21; a plurality of second magnetic recording media 22; and a plurality of third magnetic recording media 23. The magnetic head group includes a first magnetic head 31; a plurality of second magnetic heads 32; and a plurality of third magnetic heads 33. The first magnetic head can record data in the first magnetic recording medium by a first method. The plurality of second magnetic heads can record data in the plurality of second magnetic recording media by a second method. The plurality of third magnetic heads can record data in the plurality of third magnetic recording media by the second method. The first magnetic recording medium is provided between the plurality of second magnetic recording media and the plurality of third magnetic recording media in a first direction D1. The other magnetic recording medium in which the data is recorded by the first method does not overlap with the magnetic recording medium group in the first direction.SELECTED DRAWING: Figure 1

A hard disk drive includes a heat-assisted magnetic recording head and an enclosure. The enclosure is configured to contain the heat-assisted magnetic recording head and other components of the hard disk drive. The enclosure includes a base and a thermally processed top cover including a thermally oxidized interior surface. Preferably, a composition of the thermally oxidized surface of the thermally processed top cover comprises at least 5 percent oxygen. More preferably, an average oxidation depth of the thermally oxidized surface of the thermally processed top cover is at least 8 nanometers.

A magnetic disk device according to an embodiment includes a housing in which a base, an inner cover provided with a first through-hole, and an outer cover are combined in this order and hermetically sealed, a magnetic disk that is stored in the housing, a first desiccant unit that is provided at the inner cover to face the base at a position away from the base, and a second desiccant unit that is provided at the outer cover and inserted into an internal space of the housing through the first through-hole provided in the inner cover to face the base at a position away from the base.

An embodiment provides a disk device capable of suppressing a decrease in the positioning accuracy of a magnetic head relative to a recording medium. The disk device of one embodiment includes a plurality of recording media, a plurality of magnetic heads, a spoiler, and a housing. The recording media each have a recording surface, are rotatable around a rotation axis extending in an axial direction intersecting the recording surface, and are arranged in the axial direction. The magnetic head is configured to read and write information to the plurality of recording media. The spoiler includes a plurality of first blades located in a plurality of gaps provided between the plurality of recording media. The housing is provided with an inner chamber for accommodating the plurality of recording media, the plurality of magnetic heads, and the spoiler. The number of the plurality of first blades is less than the number of the plurality of gaps.

The embodiment provides a magnetic disk device capable of increasing recording capacity by taking into account the positioning accuracy of a magnetic head. The magnetic disk device of the embodiment comprises: a plurality of magnetic disks having recording layers, arranged at intervals on the same axis; a plurality of magnetic heads having magnetic poles for generating recording magnetic fields in a perpendicular direction to the recording layers, arranged at intervals along the parallel direction of the magnetic disks; and a recording current supply unit for supplying a recording current for exciting the magnetic poles to circulate a magnetic flux, wherein the recording current supply unit increases the recording current more for the magnetic heads arranged at outer positions in the parallel direction than for the magnetic heads arranged near the center in the parallel direction.

Provided are devices, and methods for use with devices, that generate oxygen from residual humidity within a sealed enclosure that is filled primarily with an inert gas. A PEM electrolyzer that is configured to generate oxygen from residual humidity is situated within the sealed enclosure. The PEM electrolyzer includes a PE membrane disposed between an anode and a cathode, and further includes a hydrogen getter. The hydrogen getter helps the PEM electrolyzer to be a net producer of oxygen. Exemplary sealed enclosure devices include hard disk drives such as HAMR hard drives filled primarily with helium.

An assembly includes a data storage disk and a spacer ring. The data storage disk includes a disk surface and first and second disk steps. The disk surface defines a x-y plane and includes a plurality of data tracks surrounding a first central opening. The first disk step is disposed proximate the first central opening at a first disk step level measured in a z direction from the disk surface. The second disk step is disposed proximate the first central opening at a second disk step level that is different from the first disk step level. The spacer ring includes a ring surface and first and second ring steps. The ring surface surrounds a second central opening. The first and second ring steps are disposed proximate the second central opening at first and second ring step levels, respectively. In the assembly, the disk surface faces the ring surface.

To provide a semi-hard magnetic white powder having properties suitable for use as a security pigment, such as a magnetic powder contained in magnetic ink used in MICR.SOLUTION: Provided is a white powder having a titanium oxide film and a silver metal film disposed, in this order, on the surface of base particles formed from an alnico alloy that is a semi-hard magnet.SELECTED DRAWING: Figure 1

The invention relates to a disc device and a ramp. According to one embodiment, the disk device includes a plurality of head gimbal assemblies, a ramp, and a plurality of magnetic disks. The slope has a plurality of protrusions disposed with a gap therebetween in the axial direction. Each of the plurality of protrusions has a first surface facing the gap, a second surface on the opposite side of the first surface, a side surface, and a stopper protruding from the side surface. The first surface and the second surface each have a first inclined region, a first flat region, and a first intermediate region provided between the first inclined region and the first flat region. The stopper is located between the two first flat areas. The width between the two first intermediate regions is equal to or less than the width between the two first flat regions, and is at least partially shorter than the width between the two first flat regions.

To provide a magnetic head and a card reader capable of reducing spacing loss caused by core wear.SOLUTION: A magnetic head 8 includes a core 14 on which a magnetic gap 8b is formed, and a first wear suppression unit 18 and a second wear suppression unit 19 for suppressing wear of the core 14. In the magnetic head 8, the magnetic gap 8b is arranged between the first wear suppression unit 18 and the second wear suppression unit 19. Further, in the magnetic head 8, the degree of hardness of the first wear suppression unit 18 is higher than the degree of hardness of the core 14, and the degree of hardness of the second wear suppression unit 19 is higher than the degree of hardness of the first wear suppression unit 18.SELECTED DRAWING: Figure 3

A hard disk drive includes ten or more magnetic disks, and an annular spacer. The annular space includes two main surfaces, an inner circumferential surface, an outer circumferential surface, and a chamfered surface present between the outer circumferential surface and each of the two main surfaces. The annular spacer is disposed such that one of the two main surfaces is in contact with one of the ten or more magnetic disks. At least one main surface of the two main surfaces includes an inclined region, and the inclined region is inclined in an outer circumferential region of the at least one main surface toward a boundary between the at least one main surface and the chamfered surface such that a surface height of the spacer gradually decreases toward the boundary.

A spindle motor includes a base being a cast product as a part of a housing of a hard disk drive device. The base has a hole portion configured to accommodate a fastening member configured to fasten a member to be attached to the base. The hole portion is a blind hole extending in a depth direction from a surface of the base and having a tip surface formed flat.

The embodiment of the invention relates to a magnetic disk device. A magnetic disk device according to an embodiment includes a rotating shaft, a shroud, and a damper. The rotating shaft rotates the plurality of discs. The shield surrounds at least a portion of the disc so as to be spaced apart from the outer edge of the disc and along the outer edge of the disc. The damper is disposed on a downstream side of the shroud with respect to a flow between the disks induced by rotation of the disks, and has a portion intersecting the flow and a portion along the flow.

The present invention relates to a magnetic recording and reproducing device and a method for manufacturing the same. One embodiment aims to adsorb contaminated gas within the magnetic recording and reproducing device by incorporating an irreversible adsorption member within the housing. The magnetic recording and reproducing device and its manufacturing method of this embodiment include an irreversible adsorption member within a sealed housing for the magnetic recording and reproducing device.

A magnetic disk device includes a disk rotatable in a rotation direction and a shroud that at least partially surrounds the disk along an outer edge of the disk with a gap from the outer edge of the disk. A guide vane is connected to the shroud at a downstream side of an airflow generated in the rotation direction. The guide vane has a structure that decelerates an airflow between the guide vane and the disk.

A base plate is a portion of a housing of a disk driving device having a disk rotating with a rotation axis as a center, and is a cast product. The base plate has a bottom plate part and a peripheral wall part. The bottom plate part has a rectangular shape when viewed in an axial direction. The peripheral wall part extends from an outer peripheral edge of the bottom plate part toward a side of the axial direction to surround the periphery of the bottom plate part. A metal member embedded in the peripheral wall part is provided.

The embodiment provides a magnetic disk device capable of increasing the recording capacity by taking into account the positioning accuracy of the magnetic head. The magnetic disk device of the embodiment comprises: a plurality of magnetic disks having recording layers, arranged at intervals on the same axis; and a plurality of magnetic heads having magnetic poles for generating recording magnetic fields in a perpendicular direction to the recording layers, arranged at intervals along the parallel direction of the magnetic disks, wherein among a plurality of groups obtained by classifying the magnetic disks according to index values ​​representing the overwriting characteristics of the magnetic disks, the group to which the magnetic disks having higher index values ​​belong is arranged at an outer position farther from the center in the parallel direction.

The embodiment provides a magnetic disk device capable of increasing the recording capacity by taking into account the positioning accuracy of the magnetic head. The magnetic disk device of the embodiment comprises: a plurality of magnetic disks having recording layers, arranged at intervals on the same axis; and a plurality of magnetic heads having magnetic poles for generating recording magnetic fields in a perpendicular direction to the recording layers, arranged at intervals along the parallel direction of the magnetic disks, wherein the magnetic heads are classified according to the proportion of magnetic recording performed on the recording tracks of the recording layers by the magnetic heads exceeding the adjacent recording tracks adjacent to the recording tracks, and the group to which the magnetic heads belong having the higher proportion is arranged at an outer position farther from the center in the parallel direction.

Read and write transducer elements have very high reliability for most of their respective lives. Only a small percentage of transducer elements fail after a significant duration of operation in the field, but failure rate ramps up significantly with as the transducer elements age, particularly with heavy read and write use. Prior solutions to this problem involve regularly running data field integrity checks. However, the data field integrity checks are resource intensive and yield significant latency impacts. The presently disclosed technology renders data field integrity checks (that come with high latency costs) dependent upon periodic or continuous head health monitoring schemes (that come with low latency costs). The data field integrity checks are triggered by a “poor health” signal generating from the head health monitoring schemes rather than being continuously or periodically performed with no regard to projected head health.

A disk device according to an embodiment includes head gimbal assemblies, a ramp, and magnetic disks. The ramp has a wall and protrusions arranged in an axial direction with a gap. Each of the protrusions includes a first surface facing the gap, a second surface located opposite to the first surface, a side surface, and a limiter protruding from the side surface. Each of the first surface and the second surface includes a first inclined region, a first flat region, and a first middle region located between the first inclined region and the first flat region. The limiter is located between two first flat regions. A width between two first middle regions is less than or equal to a width between the two first flat regions and is at least partially shorter than the width between the two first flat regions.

To provide a method for directly embedding a gasket seal in particular into a base plate for the purpose of providing a larger disc storage region in a hard disk drive and also to provide an enclosure base.SOLUTION: A base plate (enclosure base plate) 500 of a hard disk drive includes: a groove 504 that extends from an inner side wall surface 502a into a side wall 502; and a gasket seal 512 embedded in the groove. In a context where a diameter of a recording disk 520-1 gradually becomes larger, a corresponding disk shroud expands, and a corresponding side wall of the base plate becomes narrower, such a base plate is configured such that a first cover 510 can be physically engaged with a portion of the embedded gasket seal extending inward away from the side wall surface, whereby a favorable sealing mechanism is provided.SELECTED DRAWING: Figure 5A

A hard disk drive includes a magnetic disk, and an annular spacer. The annular space includes two main surfaces, an inner circumferential surface, an outer circumferential surface, and a chamfered surface present between the outer circumferential surface and each of the two main surfaces. The annular spacer is disposed such that one of the two main surfaces is in contact with the magnetic disk. At least one main surface of the two main surfaces includes an inclined region, and the inclined region is inclined in an outer circumferential region of the at least one main surface toward a boundary between the at least one main surface and the chamfered surface such that a surface height of the spacer gradually decreases toward the boundary. The magnetic disk has a thickness of 0.55 mm or less. A material of a substrate for the magnetic disk includes aluminum alloy.

A disk device according to one embodiment includes a base, a first cover, a second cover, and a damper. The base includes a bottom surface, a side wall protruding in a first direction from the bottom surface, and a support surface located at an end of the side wall in the first direction. The first cover is attached to the base to close the inner space. The second cover is joined to the base while being supported by the support surface, to cover the first cover. The damper includes a constrained layer in-between the first cover and the second cover and a viscoelastic material between the first cover and the constrained layer. The constrained layer includes a smaller-thickness part extending along the support surface and a larger-thickness part connected to the smaller-thickness part.

A modular data storage system includes a shared main PCB comprising at least one system controller, configured to operate with multiple stacked storage devices, such as modified hard disk drives in which most of the drive-unique components are kept on each drive. Each storage device is mechanically and electrically connected with the main PCB at or near an end of the storage device, and the controller is centrally positioned on the main PCB so that the total electrical transmission line length between the storage devices and the controller circuitry is minimized. Further, the controller circuitry may be positioned on the main PCB so that each electrical transmission line length between a respective storage device and the controller circuitry is substantially equivalent. Signal integrity is significantly simplified for high-speed interfaces and shorter interconnects help meet timing requirement for low-speed interfaces.

A disk device according to an embodiment includes head gimbal assemblies, a ramp, and magnetic disks. The ramp has a wall and protrusions arranged in an axial direction with a gap. Each of the protrusions includes a first surface facing the gap, a second surface located opposite to the first surface, a side surface, and a limiter protruding from the side surface. Each of the first surface and the second surface includes a first inclined region, a first flat region, and a first middle region located between the first inclined region and the first flat region. The limiter is located between two first flat regions. A width between two first middle regions is less than or equal to a width between the two first flat regions and is at least partially shorter than the width between the two first flat regions.

To provide a manufacturing method for a magnetic disk device and a magnetic disk device to ensure the design margin of the magnetic disk device.SOLUTION: A manufacturing method for a magnetic disk device according to the embodiment includes: adjusting relative heights of a spindle that can rotate and align central axes of a plurality of magnetic disks, whose ends are shifted from a geometric plane as a basis of a center point, and a plurality of ramps that will be respectively positioned at the end points of the plurality of magnetic disks; and assembling the plurality of magnetic disks along the axial direction of the spindle by aligning the shifted direction of the ends from the center point.SELECTED DRAWING: Figure 4