Western Digital Technologies, Inc.

Hitachi, Ltd.

Hitachi Global Storage Technologies Netherlands B.v.

Nidec Corporation

West Digital Technologies, Inc.

Jiro Kaneko

Yuta Onobu

Tsuyoshi Takahashi

Masahiko Sega

Kouki Uefune

Takako Hayakawa

Jian Chen

Mutsuro Ohta

Tomohiro Yoneda

Kimihiko Sudo

Isao Kobayashi

Tomio Suzuki

Takeji Sumiya

Masahiro Akagi

Takeshi Ohiro

Yuichi Arai

Takayuki Ishino

Akihiro Yudate

Naoaki Kanada

Naoshi Mizumoto

Sho Nakamura

Masaki Ootsuka

Shin Nagahiro

Yoshiya Usami

Yuuichi Ootani

Gentarou Nakamura

Kazuya Sekiguchi

Gantaro Nakamura

An electrical feed-through, such as a PCB connector, involves at least one positioning protrusion protruding from a main body, and may further include multiple positioning protrusions protruding in respective directions from the main body. A data storage device employing such a feed-through includes an enclosure base with which the feed-through is coupled. The base includes an annular recessed surface surrounding an aperture that is encompassed by the feed-through and is at a first level, and at least one recessed positioning surface at a higher level than the first level, and extending in a direction away from the annular recessed surface. The positioning protrusion of the electrical feed-through contacts the recessed positioning surface of the base, such that the position of the feed-through is constrained by the recessed positioning surface.

Sealed bulkhead electrical feed-through positioning control

An electrical feed-through, such as a PCB connector, involves at least one positioning protrusion protruding from a main body, and may further include multiple positioning protrusions protruding in respective directions from the main body. A data storage device employing such a feed-through comprises an enclosure base with which the feed-through is coupled, where the base comprises an annular recessed surface surrounding an aperture that is encompassed by the feed-through and is at a first level, and at least one recessed positioning surface at a higher level than the first level and extending in a direction away from the annular recessed surface. The positioning protrusion of the electrical feed-through physically mates with the recessed positioning surface of the base, such that the position of the feed-through is vertically constrained by the recessed positioning surface.

Disclosed herein is a magnetic storage device that comprises a housing having a base and a cover. The base includes a bottom portion and side portions that define an interior cavity for maintaining magnetic disks. The side portions form a top surface configured to receive the cover. The magnetic storage device also includes a continuous gasket disposed between the cover and the top surface. The continuous gasket is formed with at least a first region having a first cross-sectional profile, and a second region having a second cross-sectional profile. The magnetic storage device also includes an adhesive disposed between the continuous gasket and the top surface and configured to bond the continuous gasket to the base.

Magnetic storage device with improved top cover gasket and associated method of manufacture

A base member includes a recessed portion extending in radial directions and recessed upward from a lower surface of the base member, and a hole extending through the recessed portion in the vertical direction. The recessed portion includes a recessed portion loop-shaped surface defining a loop-shaped surface in the radial direction. A connector is located on a lower side of the recessed portion to cover the hole portion. An adhesive is located between the connector and the recessed portion. A minimum value of a gap distance in the radial direction between an outer end of the connector and an inner end of the recessed portion in which the outer end of the connector and the inner end of the recessed portion are opposed to each other with the adhesive therebetween is greater than a minimum value of a gap in the vertical direction distance between an upper surface of the connector and the recessed portion loop-shaped surface, in which the upper surface of the connector and the recessed portion loop-shaped surface are opposed to each other with the adhesive therebetween. The adhesive includes a filler.

Base unit and disk drive apparatus

Described herein is a hard disk drive that includes a base and a cover. The base includes a closed end, sidewalls, an open end, and one or more corner portions. The sidewalls extend from the closed end, and the open end is defined by the sidewalls. The closed end, sidewalls, and open end define an interior cavity of the hard disk drive. Each corner portion is proximate a respective intersection of the sidewalls and positioned exteriorly of the interior cavity. The cover is welded to the sidewalls over the open end by a weld bead such that the weld bead is positioned between the interior cavity and the corner portions. The weld bead hermetically seals the cover to the base. Furthermore, at least one of the corner portions is at least substantially flush with the cover.

Base for protecting external welds of hermetically sealed electronic devices

Embodiments of the present invention effectively control utilizing a spoiler, the windage vibration of a magnetic head caused by the airflow generated in accordance with rotation of a magnetic disk, while reducing the dust flowing in on the downstream side of the spoiler. According to one embodiment, a spoiler is provided with wings facing a plurality of magnetic disks and a supporting section for the wings is disposed on the upstream side of a head stack assembly in the airflow direction in accordance with the rotation of the magnetic disks. Further, the wings each extend in a direction from the outer circumferences of the magnetic disks towards the spindle shaft while reducing the width of the wing, and is formed to have the width of the wing in a range of 2.7% through 2.9% of the circumferential length of the magnetic disks in a range of two thirds of the length of the wing in a direction towards the spindle shaft from a region located at the outer circumferences of the magnetic disks.

Rotating disk storage device having a spoiler

The positioning accuracy of a magnetic head decreases due to vibrations in the in-plane rotation mode of an HDD, which are caused by couple or disturbance occurring in seek operation, due to vibrations in the thrust mode, and the conical mode, of the spindle, which are caused by disturbance, and due to vibrations in the case thrust mode, the spindle fall mode, and the like. In one embodiment, an elastic support member includes a pillar-shaped part. The elastic support member is provided with a recess on a surface opposite to a corner of a base, and longitudinal fin projections on the upper and lower sides with respect to the recess. The base is provided at its corner with a horizontal fin that is parallel to a disk surface. The horizontal fin is inserted into the recess of the elastic support member. The longitudinal fin projections come into contact with the base, and control basic vibrational characteristics on both the upper and lower sides with respect to the horizontal fin. The pillar-shaped part is provided with a zigzag-shaped part so that the pillar-shaped part may come into contact with a frame.

Magnetic disk drive with elastic support member

A magnetic disk apparatus includes a link mechanism constructed by at least a flexible portion and a hard member and one end of the link mechanism is attached to a fixing unit and the other end is attached to a hard disk assembly so that the flexible portion of the link mechanism is located on a straight line which passes through the center of gravity of the hard disk assembly, thereby having a sufficient rigidity for a disturbance in the straight line direction which acts on the HDA (Hard Disk Assembly) and reducing a natural frequency of the HDA for the disturbance in the rotating direction of the HDA.

Supporting mechanism of disk unit in magnetic disk apparatus having link

Degradation of a detector-head positioning in an information storage device using a rotary recording medium may be prevented. A reaction force which gives a vibration to a positioning mechanism in a magnetic disk drive generally occurs when the detector heads seek a destination track on a rotary recording medium. This vibration or impact may be decreased or eliminated if an actuator magnet is supported on a linear-slider member or a rotary-slider member. Sliding motion is received with a pneumatic spring to softly result in no vibration being transmitted to the spindle or other positioning mechanism. The pneumatic spring can drastically reduce a proper vibration frequency of the positioning mechanism (magnetic-circuit support) to such an extent that an electrical servo system can catch the vibration frequency and can hold down a location error. Even if a reaction force is too big to prevent resonance from being caused, the pneumatic spring can quickly attenuate the reaction force using its own throttle hole. In case the magnetic disk drive is fixed on an incline or a slant, another spring between a magnetic circuit and a housing can regulate a positional relationship relative to peripheral members including the actuator.

Information storage device using a rotary recording medium

Growing community of inventors

Kanagawa, Japan

Jiro Kaneko