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公开(公告)号：JP2001023347A
公开(公告)日：2001-01-26
申请号：JP18304999
申请日：1999-06-29
Applicant: IBM
Inventor： HASHIZUME MASATAKA , KAKIZAKI YOSHITAKA , NAKAMOTO TATSUO , TAKEUCHI KOICHI
Abstract: PROBLEM TO BE SOLVED: To provide a hard disk device which is capable of straightening air flow between disks and suppressing vibrations of the disks and actuators, and an air flow straightening blade used in the device. SOLUTION: The hard disk device 1 of this invention consists of a housing 2, the plural disks 3 which are housed rotatably in the state of being stacked in the housing 2 and the actuators 5 which are housed movably with respect to the surface of the disks 3 in the housing 2 and have data read/write head 4 at the tip thereof. In the hard disk device 1, the air flow straightening blades 6 which are streamlined in cross section are disposed while leaving a specified interval just behind the down stream side in rotational direction of the disks with respect to the moving position of the head 4 on the disks 3. Further, in order to complete the hard disk device 1, the air flow straightening blades 6, which are constituted by erecting plural plate-like bodies having streamlined cross section on a substrate 11 in such a manner that the streamlined cross section becomes parallel with the substrate 11, are utilized.
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公开(公告)号：JPH0991816A
公开(公告)日：1997-04-04
申请号：JP24967695
申请日：1995-09-27
Applicant: IBM
Inventor： NAKAMOTO TATSUO , TSUDA SHINGO , DEEBITSUDO ARUBUREHITO
IPC: G11B23/03 , G11B17/02 , G11B17/038
Abstract: PROBLEM TO BE SOLVED: To prevent the generation of distortion and deformation of a disk and to surely perform fixation to a spindle by devising and adopting a special structure to a clamp for fixing the disk. SOLUTION: By screw-fastening the screw insertion hole 51 of the clamp 50 and the screw hole 53 of the spindle 16, pressurization force is uniformly transmitted through a J ring 55 to the disk 18A and it is fixed to the spindle 16. At the time, an area thinner than an inner peripheral part is formed on the outer peripheral side of the screw insertion hole 51 of the clamp 50 and a level difference is provided. Thus, at the time of screw-fastening the clamp 50 to the spindle 16, a part of the lower surface of the head of a screw 62 pressurizes the inner peripheral thick part of the clamp 50, an empty area is formed at a thin part and a non-contact state is attained. Thus, at a clamp part near a screw center, the distortion generated by fastening is dispersed at the outer peripheral part of the clamp, the pressurization force applied from the clamp to the J ring 55 is uniformized, the distortion and the deformation generated on the disk are reduced and the fixation is performed.
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公开(公告)号：JP2002117646A
公开(公告)日：2002-04-19
申请号：JP2000295006
申请日：2000-09-27
Applicant: IBM
Inventor： TSUDA SHINGO , NAKAMOTO TATSUO , WAYNE IMAINO
Abstract: PROBLEM TO BE SOLVED: To provide a disk drive with which a user can fully enjoy such a profit that a readout or a writing speed is accelerated, when the revolution of a disk-like medium represented by a magnetic disk is speeded up. SOLUTION: A spindle 19 and a pivot 34 are disposed at the center in the direction of the width W of a base 12 or eccentrically from the center to the rotating direction of a magnetic disk 22.
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公开(公告)号：CA2386719A1
公开(公告)日：2001-07-05
申请号：CA2386719
申请日：2000-12-12
Applicant: IBM
Inventor： NAKAMOTO TATSUO , SHARMA ARUN , SATOH KIYOSHI , DANG HIEN , MCVICKER GERARD , KHANNA VIJAYESHWAR DAS , SRI-JAYANTHA SRI M
Abstract: A system for mounting a head/disk assembly (HDA), of the type including at least one information storage disk, a spindle on which said disk is rotatabl y mounted and a rotary actuator for positioning at least one head relative to the disk comprises a support structure and means (87, 83) for mounting the H DA on the support structure to permit a limited amount of substantially free rotation in reaction to movement of the actuator thereby to reduce vibration in the HDA. The HDA may be part of a hard disk enclosure (HDE) or an entire hard disk drive (HDD) mounted in a computer chassis.
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Patent Agency Ranking
公开(公告)号：JP2002133743A
公开(公告)日：2002-05-10
申请号：JP2000326417
申请日：2000-10-26
Applicant: IBM
Inventor： KOYANAGI ICHIRO , NAKAMOTO TATSUO , TAKEUCHI KOICHI
IPC: G11B23/00 , G11B17/028 , G11B17/038
Abstract: PROBLEM TO BE SOLVED: To provide a disk clamp hardly causing a dislocation on the data positions in a recording track and letting the distribution of the data positions concentrate near a central position even after a temperature cycle is implemented. SOLUTION: The material used for forming a top clamp 31 and a hub 23 is physically stable in all the temperature region in which this information recording disk device is assumed to be used and has such an elastic coefficient that the fastening force required to fix a recording disk 17 when the information recording disk device is used is available from the fastening force for fixing screws 22. The material of at least one of the top clamp 31 and the hub 23 has a coefficient of thermal expansion close to that of the recording disk 17.
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公开(公告)号：JPH0935424A
公开(公告)日：1997-02-07
申请号：JP17319295
申请日：1995-07-10
Applicant: IBM
Inventor： AOYANAGI AKIHIKO , TSUCHIDA HIROYASU , NAKAMOTO TATSUO , TSUJINO HITOSHI , TSUDA SHINGO , OTA MUTSURO
Abstract: PROBLEM TO BE SOLVED: To obtain a structure for fixing a load beam stably to a carriage. SOLUTION: When a load beam 14 is fixed to a carriage 40, the carriage 40 is fixed to a fixing plate 32 by swaging and the fixing plate 32 is fixed to the load beam 14 by welding so that the load beam 14 does not come into direct contact with a swaged part and the deformation of swaged part does not have direct effect on the load beam 14. Furthermore, stability is enhanced in the fixing of load beam by a structure wherein the carriage 40 is surrounded by the load beam 14 on the fixing plate 32 side, i.e., the load beam 14 extends from the opposite sides of longitudinal center of load beam toward the carriage 40 side.
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公开(公告)号：JP2002133827A
公开(公告)日：2002-05-10
申请号：JP2000329414
申请日：2000-10-27
Applicant: IBM
Inventor： NAKAMOTO TATSUO , TSUDA SHINGO
Abstract: PROBLEM TO BE SOLVED: To restrict the flutter of the magnetic disk of a hard disk drive having a high rotational speed. SOLUTION: A ramp 40 is provided leaving a predetermined gap from the side wall 12a of a base 12. A bypass channel 42 is formed between the side wall 12a and the ramp 40. An air flow is supplied toward the magnetic disk 22 through this bypass channel 42. The flutter of the magnetic disk 22 is reduced by adopting such a constitution.
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公开(公告)号：BR0005794A
公开(公告)日：2001-12-11
申请号：BR0005794
申请日：2000-11-22
Applicant: IBM
Inventor： SRI-JAYANTHA SRI M , KHANNA VIJAYESHWAR DAS , MCVICKER GERARD M , DANG IEN , SHARMA ARUN , SATOH KIYOSHI , NAKAMOTO TATSUO
Abstract: A system for mounting a hard disk enclosure (HDE), includes a casing pivotably mounted to minimize at least one of settle-out dynamics, external rotational vibration, and emitted vibration, the casing allowing the HDE to rotate substantially freely, wherein the center of gravity of the HDE is substantially the same as a pivot point of the casing. Further, a computer chassis includes a housing, at least one disk drive assembly for being housed by the housing, and a plurality of theta-mounts integrally built within the housing.
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公开(公告)号：AU2195201A
公开(公告)日：2001-07-09
申请号：AU2195201
申请日：2000-12-12
Applicant: IBM
Inventor： KHANNA VIJAYESHWAR DAS , MCVICKER GERARD , DANG HIEN , SHARMA ARUN , SATOH KIYOSHI , NAKAMOTO TATSUO
Abstract: A system for mounting a hard disk enclosure (HDE), includes a casing pivotably mounted to minimize at least one of settle-out dynamics, external rotational vibration, and emitted vibration, the casing allowing the HDE to rotate substantially freely, wherein the center of gravity of the HDE is substantially the same as a pivot point of the casing. Further, a computer chassis includes a housing, at least one disk drive assembly for being housed by the housing, and a plurality of theta-mounts integrally built within the housing.
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