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1. 发明专利

JPH10293976A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH10293976A
公开(公告)日：1998-11-04
申请号：JP10134097
申请日：1997-04-18
申请人： HITACHI LTD
发明人： MIZUNO SEIICHI , MOCHIDA JIRO , SUZUKI TOMIO , NAKAMURA GENTARO , UNE TOKUKI
IPC分类号： G11B33/14 , G11B21/02
摘要： PROBLEM TO BE SOLVED: To provide a magnetic disk device capable of preventing the increase of gas concentration liberated from bearing lubricant therein by arranging activated carbons for absorbing gas components liberated from grease in the vicinity of a carriage bearing or providing an air flow passage utilizing a pressure difference in an HDA and also arranging activated carbons therein. SOLUTION: Through-holes 14 and 13 are provided in a bearing jacket 3, and through an activated carbon case 16, the air passage of a return port 20 is constructed from a return passage 19. Then, by arranging the return port 20 in the inner peripheral part of a disk 8, a pressure distribution in the HDA by disk rotating winds is smaller in its inner peripheral part compared with its outer peripheral part. Thus, gas liberated from the bearing lubricant is passed through a room where activated carbons 1 are arranged, returned into the HDA and the absorbing effect of the activated carbons 1 is increased. Also, by providing an air filter 21 in this passage, oil mist is effectively captured.

2. 发明专利

JPH06103711A HEAD ASSEMBLY BODY FOR MAGNETIC DISK STORAGE DEVICE 失效
公开(公告)号：JPH06103711A
公开(公告)日：1994-04-15
申请号：JP24983392
申请日：1992-09-18
申请人： HITACHI LTD
发明人： UNE TOKUKI , NISHIMURA YUJI , MASUKAWA TETSUO , YAGINUMA YASUHIRO
IPC分类号： G11B21/02 , G11B21/16
摘要： PURPOSE:To reduce the weight of a head component, to increase the hardness of it, and to stability an access operation to a disk recording medium by making a guide arm of a hollow structure body. CONSTITUTION:Heads 10, 11 are supported by road arms 12, 13 fixed to a guide arm 14 through gimbals 15, 16. A guide arm main body 20 is consisted of pipe shaped members composed of hollow aluminum alloy and load arms 12, 13 are fixed with mounts 21, 22. Further, the positioning mechanism of a head assembly body is carried by an adaptor 23 whose one end is engaged with the hollow hole of the guide arm main body 20 and a hole in which a carriage of the positioning mechanism is fixed is provided on the other side. In such a manner, by making the guide arm of the hollow shaped component structure, reduction in the weight, increase of the hardness of the guide arm 14 are attained and the operation of the arm at the time of making access towards the disk recording medium are stabilized.

3. 发明专利

JPH02226557A GUIDE MECHANISM OF ACTUATOR FOR DISK DEVICE 失效
公开(公告)号：JPH02226557A
公开(公告)日：1990-09-10
申请号：JP4301089
申请日：1989-02-27
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： SUZUKI MASAMI , UNE TOKUKI , OTSUKA MASAKI , KAMIMURA NAOTO , MIHASHI HIROYUKI
IPC分类号： G11B21/02
摘要： PURPOSE:To improve the positioning accuracy of a magnetic head by stabilizing the travel of an actuator by providing a rolling element, and forming a mechanism so as to support a guide rail with a housing by bringing into contact with the rolling element. CONSTITUTION:The cross-section of the guide rail 4 is formed in hexagon, and two planes 41 and 42 are supported out of six planes. Also, a recessed part is provided at the housing 5, and balls 11a-11e are arranged in the recessed part. The balls 11a-11e are provided at five places in total: three places 11a, 11b, and 11c on the vertical plane 41 of the guide rail 4, and two places 11d and 11e on the horizontal plane 42, and the contact point of the planes with the guide rail forms the supporting part of the guide rail 4. Furthermore, the guide rail 4 is fixed on the housing 5 with a screw 12, however, a spring 13 is interposed between the screw 12 and the housing. By employing such constitution, it is possible to prevent a relative position generated between the guide rail and the housing from being fluctuated even when temperature change occurs in a magnetic disk being operated, which improves the positioning accuracy of the magnetic head by stabilizing the travel of the actuator.

4. 发明专利

JPH01300478A GUIDE PART STRUCTURE FOR MAGNETIC HEAD CARRIAGE 失效
公开(公告)号：JPH01300478A
公开(公告)日：1989-12-04
申请号：JP13012388
申请日：1988-05-30
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： UNE TOKUKI , SUZUKI MASAMI , HORINOUCHI MASATOSHI , MIHASHI HIROYUKI , NAKANISHI MICHIHIRO , NISHIDA HIROSHI
IPC分类号： G11B21/02
摘要： PURPOSE:To reduce a quantity of off-track due to temperature change by forming a connecting member to connect a housing to a guide rail with a material having almost the same coefficient of thermal expansion as that of the housing. CONSTITUTION:The connecting member 8 to connect the guide rail 6 which supports the carriage 4 of a magnetic head 3 via a bearing 5 to the housing 7 to be fixed on an unmovable side is generated with the material having almost the same coefficient of thermal expansion as that of the housing. Therefore, the quantity of thermal expansion of a screw 8 for mounting the guide rail 6 becomes equal to that of the housing 7, and no axial tension is changed, and no change occurs in a bending moment applied on the guide rail 6. In such a way, the quantity of off-track can be reduced.

5. 发明专利

JPH0922586A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH0922586A
公开(公告)日：1997-01-21
申请号：JP16898495
申请日：1995-07-04
申请人： HITACHI LTD
发明人： UNE TOKUKI , SUZUKI TOMIO , TAKAHASHI TAKESHI , SEGA MASAHIKO , YUKI TETSUO
IPC分类号： G11B33/12 , G11B25/04
摘要： PROBLEM TO BE SOLVED: To obtain the device capable of eliminating cover setting screws, surely tightly enclosing a head disk assembly without an adverse effect upon positioning a magnetic head and having simple manufacturability. SOLUTION: Plural magnetic disks 3 are supported by a spindle 4, and the spindle 4 is fixed to a base plate 1 and is rotatable by a spindle motor. Then, a cover 2 is joined to the base plate 1 to cover the spindle 4 and an actuator 10. An annular shrinkage material is used for a seal for covering and sealing an outer peripheral part of the cover 2 and an outer peripheral part of the base plate 1. Then, the annular shrinkage material is also used for joining up the base plate 1 and the cover 2. Moreover, the whole surface of the base plate 1 and the cover 2 is covered with a shrinkage annular body 8. Thus, there is no joint in the outer peripheries of the base plate 1 and the cover 2, and hence tight enclosure can be assured.

6. 发明专利

JPH0280809A BEARING UNIT AND MAGNETIC DISC DEVICE EQUIPPED WITH THE BEARING 失效
公开(公告)号：JPH0280809A
公开(公告)日：1990-03-20
申请号：JP23229388
申请日：1988-09-19
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： SUZUKI MASAMI , UNE TOKUKI , MIHASHI HIROYUKI , OTSUKA MASAKI
IPC分类号： F16C19/16 , F16C19/52 , G11B19/20 , G11B25/04
摘要： PURPOSE:To prevent respective members from being deformed due to thermal stress by installing the outer ring of an antifriction bearing on the second member and securing an auxiliary member on the first member with approximately same coefficient of linear expansion. CONSTITUTION:An antifriction bearing 23 is equipped between the first and second members 21, 22 with different coefficients of linear expansion from each other, and in its inner ring 24 a cylindrical auxiliary member 29 with a clearance 30 to the inner circumference is installed and the inner ring 24 and the outer ring 25 made of the material with approximately same coefficient of linear expansion as the second member 22 is installed on the second member 22 and the auxiliary member 29 made of the material with approximately same coefficient of linear expansion is fitted on the first member 21. As the result, even if the temperature of a bearing rises in use, no thermal stress will occur between the first member 21 and the auxiliary member 29 and the thermal stress due to the difference in the coefficients of material linear expansion between the auxiliary member 29 and the antifriction bearing 23 will be absorbed by the clearance 30. This prevents respective members from being deformed due to thermal stress and supports it so that it can rotate with high accuracy.

7. 发明专利

JPH01237974A BALANCE ADJUSTING SYSTEM FOR HEAD DRIVING MECHANISM IN MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH01237974A
公开(公告)日：1989-09-22
申请号：JP6522188
申请日：1988-03-17
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： NAKANISHI MICHIHIRO , SUZUKI TOMIO , UNE TOKUKI , HORINOUCHI MASATOSHI , NISHIDA HIROSHI , MIHASHI HIROYUKI
IPC分类号： G11B21/02 , G11B21/10
摘要： PURPOSE:To improve balance adjusting accuracy by reading and adjusting first information written in the prescribed position of a disk by a data head after data head positioning, in a head driving mechanism to execute the positioning of the data head through a servo head. CONSTITUTION:A first signal different from the writing data is written into a first position near a second position to write the data by the data head of a disk by using the data head. Next, the data head is positioned to the first position, immediately after it, the first signal is regenerated, the excellence of the balance of the head driving mechanism is correctly evaluated based on the regenerating signal accompanying the data head oscillation, the gravity center position of the head driving mechanism is adjusted in accordance with the evaluation result, and then, the balance adjusting accuracy is enhanced.

8. 发明专利

JPH01237957A METHOD FOR ASSEMBLING MAGNETIC FLUID SEAL AND MAGNETIC DISK DEVICE USING IT 失效
公开(公告)号：JPH01237957A
公开(公告)日：1989-09-22
申请号：JP6521988
申请日：1988-03-17
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： HORINOUCHI MASATOSHI , MIHASHI HIROYUKI , SUZUKI MASAMI , UNE TOKUKI , NISHIDA HIROSHI
IPC分类号： F16J15/43 , F16J15/40 , G11B19/20
摘要： PURPOSE:To equalize the quantity of a magnetic fluid held at respective clearances and to secure it airtightly by reciprocating a shaft body in a shaft direction after a magnetic fluid is injected into first and second clearances when a magnetic fluid seal is assembled. CONSTITUTION:Magnetic pole pieces 13a and 13b are provided at a prescribed interval in the direction of a shaft 6, clearances G1 and G2 are held at the inner circumference, and a magnet 13M to magnetize respective ones to a different polarity is sandwiched between the magnetic pole pieces 13a and 13b. At the clearance between the magnetized magnetic pole pieces 13a and 13b and a ball bearing inner wheel 9a of a rotational shaft 6, a magnetic fluid 13f is held and filled up at the magnetic circuit formed over the whole circumference. Bearing parts 10 and 9 are also of the same constitution. At the time of assembling, after the magnetic fluid is injected to the clearances G1 and G2, the shaft body is reciprocated in the shaft direction and respective holding quantities held at the clearances G1 and G2 are equalized. By the constitution, the seal action of the magnetic fluid seal installed at a closed room 3 becomes sure and the action reliability of a magnetic disk device is improved.

9. 发明专利

JPH0196876A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH0196876A
公开(公告)日：1989-04-14
申请号：JP25371487
申请日：1987-10-09
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： SUZUKI MASAMI , SUZUKI TOMIO , NAKANISHI MICHIHIRO , UNE TOKUKI , MIHASHI HIROYUKI , NISHIMURA YUJI , SHIMIZU TAKEMASA , NISHIDA HIROSHI , TAKAHASHI TAKESHI , KAWAMURA TOSHIRO , HORINOUCHI MASATOSHI , ABE YOJI , KOJIMA TOSHIAKI
IPC分类号： G11B21/02
摘要： PURPOSE:To move a carriage at high speed and position with a high accuracy by disposing a bearing contacting and rolled by an outer ring on the external periphery of a thin cylindrical carriage and providing a chord or a half moon shaped reinforcing member orthogonally to a positioning direction on the internal periphery face of the carriage at attaching positions. CONSTITUTION:The five bearings 3 are disposed in the carriage 1, the bearings are rolled along a guide path 4 to position an actuator. A driving force at this time is a Lorentz's force from a coil at the back part of the carriage. The carriage 1 is formed to the thin cylindrical shape so as not to generate a buckling or a bending by the driving force of the cylindrical coil 2 and the two reinforcing plates 5 are disposed forward and backward in the vicinity of the attaching part of the bearing 3. The reinforcing plate 5 is the half moon shape along the internal part of the cylinder of the carriage 1 and bonded internally to the carriage 1 to reinforce along a circumference and prevent a flexible deformation. The reinforcing plate is made of a thin plate to prevent the increase of a weight. According to this constitution, the flexible deformation of the carriage is eliminated to reduce a residual oscillation after the positioning and drive at high speed and position with the high accuracy.

10. 发明专利

JPS63241770A GUIDE MECHANISM FOR ACTUATOR FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS63241770A
公开(公告)日：1988-10-07
申请号：JP7488887
申请日：1987-03-28
申请人： HITACHI LTD
发明人： NAKANISHI MICHIHIRO , SUZUKI MASAMI , UNE TOKUKI , SUZUKI TOMIO , NISHIDA HIROSHI
IPC分类号： H02K33/18 , G11B21/02
摘要： PURPOSE:To prevent a guide rail from being deformed and to perform the positioning of a magnetic head with high accuracy, by constituting a mechanism in such a way that the guide rail which guides a carriage on which the magnetic head is loaded is mounted in a housing via an auxiliary member having the same expansion coefficient as that of the guide rail. CONSTITUTION:The carriage 4 on which the magnetic head 3 is loaded is supported with a bearing 7 guided by the guide rail 5, and it is moved in the direction of a disk with a magnet 9 and a coil 8. The guide rail 5 is mounted on the housing 6 with a screw 11 via the auxiliary member 10 having the same material as that of the guide rail, thereby, the deformation of the rail 5 due to the difference of thermal expansion between the rail 5 and the housing 6 for the change of an ambient temperature can be prevented from being generated. Therefore, no off-track is generated for a long period, and it is possible to perform the positioning of the magnetic head with the high accuracy and with a simple constitution.

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