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公开(公告)号：SG65714A1
公开(公告)日：1999-06-22
申请号：SG1997004606
申请日：1997-12-22
Applicant: IBM
Inventor： SERIZAWA KOHJI , KITAHORI HIROKI , MATSUZAKI SHINICHI
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公开(公告)号：JP2002124072A
公开(公告)日：2002-04-26
申请号：JP2000313251
申请日：2000-10-13
Applicant: IBM
Inventor： HIRASAKA YOSHIHIRO , SERIZAWA KOJI , MATSUZAKI SHINICHI , TAKAHASHI KOJI
Abstract: PROBLEM TO BE SOLVED: To prevent the coincidence of the frequency band generated by the peak of the acoustic frequency occurring in the rotation of a spindle motor and the resonance frequency of a damper. SOLUTION: The damper 42 which is mounted at the disk driver and plays a vibration damping function has a flat planar substrate 42a having a joint surface 42d to the disk driver and thick parts 42a and 42c thicker than the flat planar 42a. The selection width of the shape is made wider than that of the conventional flat damper and eventually the regulation of the resonance frequency of the damper at a higher degree of freedom is made possible.
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公开(公告)号：JP2001099147A
公开(公告)日：2001-04-10
申请号：JP27022899
申请日：1999-09-24
Applicant: IBM
Inventor： MATSUZAKI SHINICHI , OYAMA AKIHIRO , TAKEUCHI KOICHI , SATO KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To solve a problem that, when a ceramic ball is used as a rolling body of a bearing used in bearing mechanism, an unstable factor such as excessive preload and preload loss is caused so that working temperature condition is limited, since a ceramic member has a low linear expansion coefficient against the other member, although it is desired to use ceramic for durability and vibration resistance. SOLUTION: With respect to a shaft 34 (stainless steel) for retaining inner rings 33a, 34a of a pair of bearings 33, 34, a sleeve 40 (aluminum) is formed of a member having a high linear expansion coefficient to retain outer rings 33b. A change rate of a temperature of a distance X between the outer rings 33b is made to be higher than that of a distance Y between the inner rings 33a, 34a, so that difference of change in dimension of the inner rings 33a, 34b, outer rings 33b, and a rolling body is compensated by difference of change in dimension of a distance between the bearings.
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Patent Agency Ranking
公开(公告)号：JP2001093262A
公开(公告)日：2001-04-06
申请号：JP26674199
申请日：1999-09-21
Applicant: IBM
Inventor： MATSUZAKI SHINICHI , SASAKI MASAKAZU , OTA MUTSURO , SUZUKI TAKAHISA
IPC: G11B33/12 , G11B17/038 , G11B19/20 , G11B25/04
Abstract: PROBLEM TO BE SOLVED: To provide a low-cost dummy disk, wherein disk slipping or the deformation of the dummy disk is prevented even when a heating/cooling process is repeated, and the increase of a load on a bearing by a weight increase is prevented. SOLUTION: A dummy disk 24 made of stainless steel is loaded instead of the magnetic disk of a hard disk drive. Rigidity is reduced by forming a circumferential groove 241 in the dummy disk 24, and a resonance frequency is matched with magnetic disks (0, 1). Thus, even when the dummy disk 24 is loaded, a pitching frequency equal to that when only the magnetic disk is loaded.
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5.发明专利
公开(公告)号：JPH1196707A
公开(公告)日：1999-04-09
申请号：JP24421497
申请日：1997-09-09
Applicant: IBM
Inventor： SERIZAWA KOJI , OTA MUTSURO , TAKAHASHI HIROSHI , MATSUZAKI SHINICHI
Abstract: PROBLEM TO BE SOLVED: To prevent a suspension arm from being brought in contact with an inner surface of a housing due to vibration by providing a vibration limit part colliding the suspension arm at a prescribed amplitude position to limit a vibration amplitude on the upper part of retreat surface of a ramp when the suspension arm existing on the retreat position of the ramp is vertically vibrated due to the vibration from the outside. SOLUTION: A support part 31 of a ramp is provided with projection parts 38a-38b. The matter that an interval between a suspension arm 14 and the projection part 38 is made small within the range not colliding when the suspension arm slides on a guide surface at a load/unload time is preferred from a point of view of an amplitude limit. Thus, the projection part 38a prevents collision between the suspension arm 14a and the upper surface or the cap of a housing, the projection part 38b prevents the collision between the suspension arms 14b and 14c and the projection part 38c prevents the collision between the suspension arm 14d and the lower surface or the base of the housing.
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公开(公告)号：JPH1196699A
公开(公告)日：1999-04-09
申请号：JP26224897
申请日：1997-09-26
Applicant: IBM
Inventor： MATSUZAKI SHINICHI , SERIZAWA KOJI , OTA MUTSURO , TAKAHASHI HIROSHI
Abstract: PROBLEM TO BE SOLVED: To properly guide a rotary actuator to a limit rotational angle and locks the same in a disk storage device. SOLUTION: A rotary actuator 20 is attached rotatably around a spindle shaft 16 as a pivotal shaft in a housing 12. An iron piece 60 is made rotatable integrally with the rotary actuator and attracted by a locking magnet 70 magnetically, and a pulling-in magnet 80 is added and set to assist suction torque for an unloading operation during the retreating of the rotary actuator 20 to a lamp 30. Thus, even in a thin hard disk device, even if a small current obtained by recovering the rotational force of a disk when power is off is provided to a coil 42, an unloading operation is successfully performed.
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公开(公告)号：JPH10269720A
公开(公告)日：1998-10-09
申请号：JP20331097
申请日：1997-07-29
Applicant: IBM
Inventor： SERIZAWA KOJI , KITABORI HIRONORI , MATSUZAKI SHINICHI
Abstract: PROBLEM TO BE SOLVED: To secure the clearance between the base bottom surface and the top cover of a flexible cable assembly and an enclosure case. SOLUTION: An FPC cable assembly has an FPC cable 101, reinforcing films 102, 103, and 104, and reinforcing plates 105, 106, and 107. The reinforcing films 102 and 103 are laminated to a first mounting part 111 and a second mounting part 113 of the FPC cable 101, and the reinforcing plates 105 and 106 are laminated via the reinforcing films 102 and 103. By laminating a reinforcing film to the mounting parts 111 and 113 in advance, the deformation of the mounting parts 111 and 113 can be suppressed when laminating the reinforcing plate, thus improving the lamination accuracy of the FPC cable 101 and the reinforcing plates 105 and 106, and hence securing a clearance with the enclosure case.
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公开(公告)号：JPH08106761A
公开(公告)日：1996-04-23
申请号：JP23489094
申请日：1994-09-29
Applicant: IBM
Inventor： SERIZAWA KOJI , KOYANAGI ICHIRO , MATSUDA HIROSHI , MATSUZAKI SHINICHI , TAKAHASHI HIROSHI
Abstract: PURPOSE: To obtain a low-cost flexible cable structure by improving assembling properties. CONSTITUTION: In a hard disk drive, power and signal are transmitted and received between a carriage having a magnetic head for reading the magnetic information under the positional control on the disk and a card of the lower surface of a base. The movable part 44 of the cable 42 is supported by the carriage, followed up, and a non-movable part 46 is bent to enclose a reinforcing plate 50, and mounted on the base via the late 50. The plate 50 reinforces to connect a carriage connector 84 to the card 40 on the lower surface 60, and to hold the attitude to hold the lateral attitude of the part 44 on the thick surface 64. In summary, the one plate is sufficient.
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