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1. 发明专利

JPH10334436A MAGNETIC DISK DEVICE AND ITS MANUFACTURE 失效
公开(公告)号：JPH10334436A
公开(公告)日：1998-12-18
申请号：JP14179097
申请日：1997-05-30
申请人： HITACHI LTD
发明人： TOKISUE HIROMITSU , YONEKAWA SUNAO , ISHII NOBUYUKI , HORIGUCHI YASUYUKI , ENDO KIJU , YOSHIMURA YASUHIRO , ITO YUTAKA , NARISAWA OSAMU
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To prevent a lubricant from sticking and accumulating to a slider and to avoid start-up trouble of the magnetic disk device due to tack and to secure safety against the start-up trouble and high reliability by making a contact angle of the surface of the slider with the lubricant applied on a magnetic disk more than a specified angle. SOLUTION: When the slider 2 is traveled in floating above or in contact with the surface of the magnetic disk 1, the lubricant 11 is stuck and accumulated to a bleed surface 9 of the slider 2. For the purpose of quantifying a relationship between this sticking amt. and surface energy of the slider 2, grease is used as a sticking liquid, and when a stuck and accumulated grease amt. on the slider 2 and a grease contacting angle of the surface of the slider 2 are measured after 1,000 hours of continuous operation, no grease is stuck to the slider 2 in the case of the contact angle set at >=50 degrees. Then, at this time, i.e., when a sticking and accumulating amt. of the grease to the slider is zero, tacky power is suppressed to be a small value that is the same as the initial state.

2. 发明专利

JPH07312077A MAGNETIC DISK DEVICE AND ITS ARRANGING DEVICE 失效
公开(公告)号：JPH07312077A
公开(公告)日：1995-11-28
申请号：JP10000394
申请日：1994-05-13
申请人： HITACHI LTD
发明人： HIROSE SHINICHI , YONEKAWA SUNAO
IPC分类号： G11B33/14 , G11B33/12
摘要： PURPOSE:To make a service life longer by forming a container which is partly openable and closable and opening the container only when the container is inserted into a service device. CONSTITUTION:This magnetic disk device 1 is normally hermetically closed by a cap 6 which is held closed. Namely, the cap 6 is pressed by means of a hermetic spring 7 to a gasket 12 for hermetic closing, by which hermeticity is maintained in the device 1. A lock pin 8 is unlocked by utilizing an unlocking hole 9 and the cap 6 is made openable and closable when the device 1 is inserted into the arranging device. The hermetic structure is thus maintained and the infiltration of dust from outside is prevented in an ordinary use state. On the other hand, the opening/closing part of the container is opened to permit cleaning of the magnetic head and magnetic disk and replenishing of the magnetic disk with a lubricant when the device 1 is inserted into the arranging device. Cleaning of the case inside is thus possible. Since the arranging service of the device 1 in an arbitrary period of time is possible, the performance is maintained and the service life is prolonged.

3. 发明专利

JPH05248814A 失效
公开(公告)号：JPH05248814A
公开(公告)日：1993-09-28
申请号：JP4713192
申请日：1992-03-04
申请人： HITACHI LTD
发明人： MAKINO KIYOSHI , KAWAKUBO YOICHI , YONEKAWA SUNAO , SASAKI TAMOTSU
IPC分类号： G01B7/34 , G11B5/84
摘要： PURPOSE:To correctly detect a partial damage in the early stage of the surface of a rotary disk medium caused by the sliding motion without fail in a method to evaluate the strength of the medium by pressing a test piece to slide on the surface of the rotating disk medium thereby to detect the vibration or the change of the frictional resistance of the test piece. CONSTITUTION:An output 16 of an AE sensor for detecting the vibration of a test piece and an output 17 of a strain gauge for detecting the frictional resistance are synchronously obtained with the rotation of a medium (signal 11). The change of the signal outputs 16, 17 over a fixed level is detected based on the fixed detecting level. If the obtained signal (output 19a of the AE level sensor and output 19b of the level sensor of the strain gauge) appears at the position of the same angle for not smaller than a predetermined number of times (e.g. when an angle signal is detected for a predetermined number of times at the position of the rotating phase theta deg.), a reproducibility judging signal generated, and the medium is judged to have a partial damage on the surface thereof.

4. 发明专利

JPH11134626A PRODUCTION OF MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH11134626A
公开(公告)日：1999-05-21
申请号：JP29669997
申请日：1997-10-29
申请人： HITACHI LTD
发明人： YOSHIMURA YASUHIRO , AONO TAKANORI , IKEDA YUKIKO , ENDO KIJU , TOKISUE HIROMITSU , YONEKAWA SUNAO
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To prevent spacing loss and the sticking of a slider to a magnetic disk by producing the slider by coating with a fluorine-contg. compd. and irradiation with UV-contg. light. SOLUTION: In the production of a magnetic disk device with a magnetic head which performs the recording and reproduction of data to a magnetic disk 1 with a lubricant formed on the surface and a slider mounted with the magnetic head and confronting the magnetic disk, at least the surface of a slider confronting the magnetic disk is irradiated with argon plasma, coated with a fluorine-contg. compd. and dried by heating or irradiated with UV to produce the objective slider. Since the surface material of the slider is activated by irradiated with the argon plasma, bonding to the fluorine-contg. compd. is made tighter and the surface of the slider is made irregular. The lubricant or grease on the magnetic disk comes is contact with only the irregularities of the slider and oil repellency increases.

5. 发明专利

JPH0845260A METHOD FOR SUPPLYING LUBRICANT 失效
公开(公告)号：JPH0845260A
公开(公告)日：1996-02-16
申请号：JP18215494
申请日：1994-08-03
申请人： HITACHI LTD
发明人： EBIHARA SUSUMU , NAGAIKE SADAKUNI , YONEKAWA SUNAO , HIGASHIYA TERUYOSHI , HIGASHIJIMA TETSUJI , TOKUYAMA MIKIO , HIGUCHI SHINSUKE , HIROSE SHINICHI
IPC分类号： G11B33/12
摘要： PURPOSE:To obtain a device which does not generate damage of a head and a disk during the predetermined life time and has high reliability by compensating a decrease in the effective lubricant applied on the disk surface of a disk device which operates while the head and the disk make intermittent or continuous contact with each other. CONSTITUTION:The working time of the disk device is integrated by a timer and is compared with the time until the preset replenishment of the lubricant by a deciding means. The lubricant is replenished by a lubricant replenishing device 11 when the replenishment is judged to be necessary. This lubricant replenishing device 11 is connected to a through-hole 10 with an opening/closing mechanism disposed at a HDA 9 of the device and is further applied with pressurizing force, by which the lubricant previously filled into a vessel 15 is supplied in the form of spray into the HDA. The lubricant is thus uniformly adhered onto the surface of the disk 5.

6. 发明专利

JPH06203503A MAGNETIC DISK DEVICE AND MAGNETIC DISK INSPECTION DEVICE 失效
公开(公告)号：JPH06203503A
公开(公告)日：1994-07-22
申请号：JP128793
申请日：1993-01-07
申请人： HITACHI LTD
发明人： OTANI YUICHI , YONEKAWA SUNAO , TAKAHASHI TAKESHI , AKIYAMA KEIJI , KAWAKUBO YOICHI
IPC分类号： G11B5/84 , G11B19/06 , G11B21/12
摘要： PURPOSE:To prevent a floating head and a magnetic disk from being flawed and to remove dust stuck to a head rail surface by making a revolving speed of the magnetic disk at the time of loading or unloading such that a floating head is brought into contact with the magnetic disk with low tangential force. CONSTITUTION:The magnetic disks 1 are assembled and fixed to a spindle 2, and are rotated at high speed by a rotating motor 3. The floating heads 4 are assembled with a carriage 5 for the purpose of scanning the magnetic disks 1 in the radial direction. The floating head 4 is composed of a piezoelectric body or a small motor cylinder cam., etc., and is loaded or unloaded onto or from the magnetic disk 1 by a loading/unloading part 6. By this constitution, when the magnetic disk 1 is rotated at a revolving speed lower than that in the recording and reproducing time, and also at such speed that the floating head 4 is brought into contact with the magnetic disk 1 with low tangential force, the loading or unloading can be performed.

7. 发明专利

JPH01166301A ADHESION PREVENTING MECHANISM FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH01166301A
公开(公告)日：1989-06-30
申请号：JP32393287
申请日：1987-12-23
申请人： HITACHI LTD
发明人： YONEKAWA SUNAO
IPC分类号： G11B5/012 , G11B5/82
摘要： PURPOSE:To prevent adhesion between a head and a disk from being increased by providing a taper surface in the outer circumferential edge of the disk and bringing the surface of the disk into contact with a head slider edge with moving a rail in the outer circumferential side to the taper part when the revolution of the disk is stopped. CONSTITUTION:A taper surface 2 is provided in the outer circumferential edge of the disk. Then, when the disk is stopped and the outer slider of a head 3 is moved to the taper surface 2, the slider surface 2 goes to have an angle to a disk flat surface 1 and the taper surface 2 since the relative height of a slider edge 5, which contacts the disk flat surface 1 and the taper surface 2, is changed. Accordingly, the head 3 and the disk does not have surface-contact and a contact area can be reduced. Thus, even in a condition that the disk is stopped for a long time, the adhesion can be prevented from being increased.

8. 发明专利

JP2003317415A Magnetic disk drive and magnetic head 审中-公开
标题翻译：磁盘驱动器和磁头
公开(公告)号：JP2003317415A
公开(公告)日：2003-11-07
申请号：JP2002111889
申请日：2002-04-15
申请人： Hitachi Computer Peripherals Co Ltd , Hitachi Ltd , 日立コンピュータ機器株式会社 , 株式会社日立製作所
发明人： UEDA FUMIOMI , NATORI SHOJI , YONEKAWA SUNAO , SUDA MITSUO , HIROSE SHINICHI
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To solve the problem that a gap in an inner circumferential side between a magnetic disk and a magnetic head becomes wider than necessary to excessively lower the recording and reproducing characteristic of a magnetic disk drive when the protrusion quantity of an element involved in an increase in a recording frequency is added to the gap between the magnetic disk and the magnetic head. SOLUTION: The contact of the magnetic disk with the magnetic head is avoided which is caused by protrusion in the vicinity of the element involved in a rise in element temperature due to an increase in a recording frequency, and deterioration in a recording and reproduction characteristic is minimized by controlling to make the gap large between the magnetic disk and the magnetic head in accordance with the quantity that the element protrudes due to generated heat corresponding to a recording frequency at recording radius position of the magnetic disk. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题为了解决磁盘和磁头的内周侧的间隙比使磁盘驱动器的突出量变得过大而使磁盘驱动器的记录和再现特性变得过大的问题，在磁盘和磁头之间的间隙中增加了涉及增加记录频率的元件。解决方案：避免了磁盘与磁头的接触，这是由于由于记录频率的增加而引起的与元件温度升高相关的元件附近的突起引起的，并且记录和通过根据与磁盘的记录半径位置处的记录频率相对应的产生的热而引起的元件的数量，通过控制使磁盘和磁头之间的间隙大而最小化再现特性。版权所有（C）2004，JPO

9. 发明专利

JPH10283745A NEGATIVE-PRESSURE SLIDER AND MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH10283745A
公开(公告)日：1998-10-23
申请号：JP8902197
申请日：1997-04-08
申请人： HITACHI LTD
发明人： KODAIRA HIDEKAZU , MATSUMOTO MASAAKI , HASHIMOTO SEIJI , YONEKAWA SUNAO , ENDO MASAYOSHI
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a negative-pressure slider with a small scattering in the amount of floating even if the length of an air introduction part for generating a negative pressure changes due to a machining scattering by reducing the accumulation of a lubricant at the groove part of the air bearing surface of a slider and the increase in the adhesive force between the slider and a disk storage medium, and a magnetic disk device using the negative-pressure slider. SOLUTION: A negative-pressure slider 100 has air introduction parts 130 and 132, cross rails 120 and 122, side rails 110 and 112, a first groove part 140, and a magnetic transducer 180. Further, the negative-pressure slider 100 has a second groove part 160 that is provided to separate air introduction parts 130 and 132 being provided to separate the air introduction parts 130 and 132 at the air flow-in edge side of the slider and a slit 150 that is provided to connect the first groove part 140 and the second groove part 150 and to separate the cross rails 120 and 122. Also, a width W2 of a part where the air introduction parts 130 and 132 are connected to the cross rails 120 and 122 is made narrower than a width W3 of a part where the side rails 110 and 112 are connected to the cross rails 120 and 122.

10. 发明专利

JPH1011730A STICKING PREVENTED MAGNETIC HEAD 失效
公开(公告)号：JPH1011730A
公开(公告)日：1998-01-16
申请号：JP16272796
申请日：1996-06-24
申请人： HITACHI LTD
发明人： YONEKAWA SUNAO , TANI KOUJI , UNE TOKUKI , SHIMIZU TAKEMASA
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To prevent a magnetic head and a magnetic disk from being stuck to each other at the time the stoppage of a magnetic disk device by promoting the falling of lubricant stuck on a floating surface in the floating of the mag netic head. SOLUTION: In this magnetic head, parts having minute difference in level for accumulation of lubricant 6 are formed at flow-out ends of the floating surface 3 of a slider 1. When lubricant 8 stuck on the floating surface 3 of the slider 1 in the working of the magnetic disk device is collected in the parts 6 having difference in level and becomes a volume of not less than a certain volume, the lubricant 8 is brought into direct contact with the magnetic disk medium at the time of the contact between the floating surface 3 of the slider 1 and the magnetic disk or in the operation of a CSS and lubricant 8 falls off from the slider 1. Lubricant 8 accumulated on the parts 6 having difference in level repeats stickings and fallings in this manner and, as a result, the increasing of lubricant to be stuck on the slider 1 is suppressed.

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