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公开(公告)号：SG76548A1
公开(公告)日：2000-11-21
申请号：SG1998001731
申请日：1998-07-06
Applicant: IBM
Inventor： MORITA AKIRA , TSUDA SHINGO , KAKIZAKI YOSHITAKA
Abstract: The present invention provides a magnetic disk device which firmly fixes the yokes of a rotary actuator between a base and a cover. The yoke can be made compact and the movable range of the rotary actuator can be wide. An attaching screw attaches a first yoke to a base and fixing screws passing through the second yoke and the first yoke from a cover are screwed to the base.
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公开(公告)号：JPH11144439A
公开(公告)日：1999-05-28
申请号：JP29723997
申请日：1997-10-29
Applicant: IBM
Inventor： TSUDA SHINGO , MORITA AKIRA , KAKIZAKI YOSHITAKA
Abstract: PROBLEM TO BE SOLVED: To alleviate disk flutter by providing a shroud which may be fitted later to a magnetic disk apparatus. SOLUTION: A shroud 100 is provided as a part to be fitted later to a housing in such a manner as surrounding a part 94 of the angular range of the disk periphery along the relevant disk periphery attached rotatable to the relevant housing of a magnetic disk apparatus. Moreover, there is provided a magnetic disk apparatus having the shroud 100. Moreover, there is provided a new assembling method conforming to the new assembling sequence fitted to later provision of shroud as a method of manufacturing a magnetic disk apparatus. Use of shroud 100 enables control of disk flutter due to disturbance from the point of view of hydrodynamics and also improves track positioning accuracy.
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公开(公告)号：JPH11167781A
公开(公告)日：1999-06-22
申请号：JP32824497
申请日：1997-11-28
Applicant: IBM
Inventor： KANAMARU MASAYUKI , AKIYAMA HIROYUKI , MORITA AKIRA , TSUDA SHINGO
Abstract: PROBLEM TO BE SOLVED: To improve durability on a landing zone surface and to prevent the life of a device from shortening by providing a control means moving an actuator arm toward an actuator lock when read/write operation is ended. SOLUTION: Plural bumps of a leather texture are formed on the landing zone 3 surface. A spindle motor 17 and a voice coil motor 9 rotating a hard disk 2 are controlled by a driver 19 to move the actuator arm 7. A head slider assembly 4 is loaded on the front end of the arm 7, and the rear end is attached pivotally to a frame of a hard disk device. An inside actuator lock 11 is loaded on the frame, and is engaged with the arm 7, and positions a read/write head onto the zone 3 to position it onto an outermost track of a data recording zone.
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公开(公告)号：JPH1139811A
公开(公告)日：1999-02-12
申请号：JP18154997
申请日：1997-07-07
Applicant: IBM
Inventor： MORITA AKIRA , TSUDA SHINGO , KAKIZAKI YOSHITAKA
Abstract: PROBLEM TO BE SOLVED: To firmly fix a yoke of a rotary actuator, prevent generation of vibrations and noises and miniaturize the yoke, by using a mounting member for mounting a first yoke to a base and a fixing screw penetrating from a cover through a second yoke and the first yoke to the base, thereby screwing the yokes to the base. SOLUTION: A yoke couple body 20 is positioned on a case 11 by the engagement of a hole 21C of a first yoke 21 and a cylindrical part 11A of the case 11, and a projecting part formed at an inner face of the case 11. The yoke couple body 20 is secured on the case 11 by passing a lower mount screw 32 to a hole 11C of the case 11 and screwing to a screw hole 21D of the first yoke 21. A cover 12 is fitted to the case 11. A fixing screw 31 is screwed to a hole 11B of the cylindrical part 11A through a through hole 22B from a hole 12A of the cover 12. The yoke couple body 20 is thus firmly secured between the case 11 and cover 12, thereby restricting vibrations of a voice coil motor and reducing noises.
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