23results about "Apparatus for flat record carriers" patented technology

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.

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

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.

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 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.

A disk apparatus includes a housing including a base, the base including a bottom wall and a frame-like side wall standing upright along peripheral edges of the bottom wall, and a top cover joined to the base, a rotatable disk-shaped recording medium disposed in the housing, a protective cover including a top plate secured to the top cover and a side plate facing one side surface of the base, and a shock absorber sandwiched between the side plate and the one side surface of the base.

According to one embodiment, a disk device includes a housing filled with a low density gas containing oxygen and having a density lower than a density of air, a disk-shaped recording medium provided in the housing to be rotatable, a spindle motor provided in the housing and supporting and rotating the recording medium, and a magnetic head including a heat assist element which heats the recording medium. A surface of magnet of the spindle motor is covered with a shielding film blocking oxygen permeation.

According to one embodiment, a disk device includes two magnetic disks opposing each other at intervals of 1.2 to 1.5 mm, and at least two suspension assemblies movable respectively between the two magnetic disks. Each of the suspension assemblies includes a base plate, a load beam extending from the base plate, a tab extending from a distal end of the load beam, a wiring member on the load beam and the base plate, including a gimbal portion, and a magnetic head on the gimbal portion, abutting on a dimple of the load beam via the gimbal portion. The ratio of a distance from a bendable location of the load beam to a center of the dimple with respect to a distance from the center of the dimple to a tip of the tab is 2.8 to 3.8.

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

The present disclosure provides a disk device capable of increasing storage capacity per unit volume. A disk device of one embodiment includes a plurality of disks, a spindle motor, and a housing. The disks have recording surfaces and are arranged at intervals from each other in an axial direction intersecting the recording surfaces. The spindle motor holds the disks so that the disks rotate around a first rotation axis extending in the axial direction. The housing has a first wall in which the spindle motor is installed and which is separated from the disks in the axial direction, a second wall provided to an outer surface of the first wall and protruding from the first wall and surrounding the disks. A maximum distance between the inner surface and the outer surface in the axial direction is 1.5% or more and 8% or less of a maximum dimension of the housing in the axial direction.

An electronic device includes a chassis, a hard disk drive, at least one fan and a damping structure. The hard disk drive is disposed in the chassis. The at least one fan is disposed in the chassis. The damping structure is located between the hard disk drive and the at least one fan, and includes an elastic member and a mass block. The elastic member includes a mounting portion, a supporting portion and a swinging portion. The mounting portion is configured to be disposed in the chassis. Two opposite ends of the supporting portion are respectively connected to the mounting portion and the swinging portion. The mounting portion and the swinging portion are located on a side of the supporting portion. The swinging portion is swingable relative to the supporting portion and the mounting portion. The mass block is disposed on the swinging portion.

The problem that this invention aims to solve is to provide a magnetic disk device that achieves both suppression of the reduction in the positioning accuracy of the magnetic head due to flow and a reduction in the amount of particles adhering to the disk. [Solution] The magnetic disk device of the embodiment comprises a rotating shaft, a shroud, and a damper. The rotating shaft rotates a plurality of disks. The shroud surrounds at least a portion of the disks, along the outer edge of the disks, with a gap between the shroud and the outer edge of the disks. The damper is provided downstream of the shroud with respect to the flow between the disks induced by the rotation of the disks, and the damper has a portion that intersects with the flow and a portion that follows the flow.

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.