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1. 发明专利

JPS62124677A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS62124677A
公开(公告)日：1987-06-05
申请号：JP26244885
申请日：1985-11-25
申请人： HITACHI LTD , HITACHI COMPUTER KIKI KK
发明人： YOKOYAMA NOBUHIRO , USHIJIMA NOBUYOSHI , SOGABE CHIKAYUKI , ISHIKAWA ATSUSHI , HANADA KAZUYOSHI
IPC分类号： G11B21/02
摘要： PURPOSE:To prevent the influence of change of ambient temperature on the accuracy of positioning of a head by bringing a bearing into contact with one side in the same direction of bearing fixing holes on both sides of a carriage or making the bearing eccentric to bring it very close to the side. CONSTITUTION:An adhesive 6 is filled between upper and lower bearings 4, 5 loose fitted to upper and lower housings 2, 3 of a carriage 1, and head positioning is made by bonding the fixing upper and lower bearings 4, 5 thrusting them in the same direction of upper and lower housings 2, 3 to make them eccentric. By making bearings 4, 5 eccentric in the same direction to upper and lower housing 2, 3, even when difference in thermal expansion is caused by ambient temperature, upper and lower bearings elongate similarly in radial direction to the center of a shaft 7. Accordingly, only the center of the shaft 7 makes parallel movement without giving angle of inclination to the carriage 1, and consequently, relative positional deviation of the head can be prevented.

2. 发明专利

JPS6297180A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS6297180A
公开(公告)日：1987-05-06
申请号：JP23526485
申请日：1985-10-23
申请人： HITACHI LTD , HITACHI COMPUTER KIKI KK
发明人： ISHIKAWA ATSUSHI , HANADA KAZUYOSHI , SOGABE CHIKAYUKI , USHIJIMA NOBUYOSHI , YOKOYAMA NOBUHIRO
IPC分类号： G11B21/02
摘要： PURPOSE:To obtain a high-speed and compact magnetic disk device which applies a linear tracking system with large capacity, by securing an access action in a specific direction through an actuator containing a magnetic head attached at the tip of the actuator. CONSTITUTION:A magnetic medium disk 1 is laminated on a spindle motor 6 via a spacer 5 and a magnetic head 2 is set at the tip of an actuator 7. A coil 4 is attached to the actuator 7 with proper spaces secured to a magnet 8 and a center pole 9. Thus a VCM is formed. Then a bearing 10 which can transfer a rail 3 is provided to the actuator 7. In this case, the actuator having the head 2 attached at its tip execute an access action toward A. Here, the coil 4, the center pole 9, the magnet 8 and the rail 3 are set in the same direction as A.

3. 发明专利

JPS6289276A MAGNETIC HEAD POSITIONING MECHANISM FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS6289276A
公开(公告)日：1987-04-23
申请号：JP22871085
申请日：1985-10-16
申请人： HITACHI LTD , HITACHI COMPUTER KIKI KK
发明人： SOGABE CHIKAYUKI , USHIJIMA NOBUYOSHI , ISHIKAWA ATSUSHI , HANADA KAZUYOSHI , YOKOYAMA NOBUHIRO
IPC分类号： G11B21/02
摘要： PURPOSE:To reduce less the size of a magnetic disk device by putting a part of a carriage attaching the magnetic head into the area between the head and a magnetic disk when this head is positioned at the inner circumference of the disk. CONSTITUTION:A DC motor 4 attached with a magnetic disk 1 which records the information is provided together with a base 5 attached with the motor 4, a support 12 holding a bearing 6 on the base 5, and a carriage 7 held by the bearing 6. A magnetic head 8 which writes the information and a voice coil 10 which moves the carriage 7 are attached to the carriage 7. Then the part where the carriage 7 is held by the bearing 6 is put between the head and disk when the head moves to the inner circumferential part of the disk. Then the part of the carriage set between the head and the disk can be held by the bearing. As a result, the most exterior size of the carriage can be reduced less than the exterior form of the disk. Thus a magnetic disk device can be miniaturized.

4. 发明专利

JPS6289290A STORAGE DEVICE 失效
公开(公告)号：JPS6289290A
公开(公告)日：1987-04-23
申请号：JP22870985
申请日：1985-10-16
申请人： HITACHI LTD , HITACHI COMPUTER KIKI KK
发明人： USHIJIMA NOBUYOSHI , SOGABE CHIKAYUKI , ISHIKAWA ATSUSHI , HANADA KAZUYOSHI , YOKOYAMA NOBUHIRO
IPC分类号： G11B21/02 , G11B25/04
摘要： PURPOSE:To obtain a storage device which contains a signal circuit system and is free from faults due to the disconnection of a signal line, etc., by using a photoisolator to connect a traveling object and the fixed side. CONSTITUTION:A memory medium 1 is rotated by a spindle motor 2 and a magnetic head 3 serves as a storage device consisting of a carriage 6 which is positioned at an optional place on the medium 1 by a stepper 4 and a belt 5, a circuit 7 set on the carriage 6, a photodiode 8, a phototransistor 9 set in opposition to the photodiode 8, a bracket 10 which supports the transistor 9, a cable 11 through which power is supplied to the circuit 7, and a base 12 respectively. A photocoupler 13 consists of the photodiode 8 and the phototransistor 9. The signal of the head 3 is transmitted by the coupler 13 and only the cable 11 receives fatigue caused by the shift of the carriage 6. Thus the signal of the head 3 is relieved from the fatigue lifetime.

5. 发明专利

JP2000322881A MAGNETIC DISK APPARATUS AND DISK ARRAY SYSTEM 失效
公开(公告)号：JP2000322881A
公开(公告)日：2000-11-24
申请号：JP12725199
申请日：1999-05-07
申请人： HITACHI LTD
发明人： HANADA KAZUYOSHI , KINOSHITA AKIHIKO
IPC分类号： G11B33/12 , G11B25/04
摘要： PROBLEM TO BE SOLVED: To eliminate a work and a jig for positionally adjusting an interface connector due to errors because of accuracy of parts. SOLUTION: The magnetic disk apparatus consists of an HDA including disks 3 as a magnetic recording medium, magnetic heads 7 for recording or reproducing information to the disks 3 and a base 2 and a cover 15 for enclosing the disks 3 and magnetic heads 7, a main substrate 11 with a circuit part for controlling the HDA and transmitting and receiving information signals, and an interface connector 1 for transmitting and receiving information signals between a host apparatus and the main substrate and supplying a power source. In this case, a plurality of fixing screw holes 19 for setting the magnetic disk apparatus to the host apparatus are formed to a base 1. For accurately ensuring a position of the interface connector based on the fixing screw holes as a reference position, the interface connector itself is directly fixed by screws or fixedly bonded to the base in the magnetic disk apparatus.

6. 发明专利

JPH06111247A MAGNETIC DISC 失效
公开(公告)号：JPH06111247A
公开(公告)日：1994-04-22
申请号：JP25436292
申请日：1992-09-24
申请人： HITACHI LTD
发明人： SHIIKI KAZUO , NARUSHIGE SHINJI , TANABE MASANORI , SUDA MITSUO , YONEKAWA TAKAO , AMANO HIDEAKI , MATSUDA KENJI , HANADA KAZUYOSHI
IPC分类号： G11B5/39
摘要： PURPOSE:To obtain a magnetic disc employing a magnetoresistive effect type head which allows highly reliable high density recording. CONSTITUTION:The magnetic disc comprises a power supply 6 for applying voltage between a magnetic disc 1 and main element parts of a magnetic head 3, and an electrode 5 for applying a voltage onto a rotating magnetic disc 1. When the voltage being applied between the magnetic disc 1 and the main element parts of the magnetic head 3 is controlled, adhesion of foreign matter and leakage current can be prevented while avoiding sliding destruction.

7. 发明专利

JPH0696570A MAGNETIC DISK APPARATUS 失效
公开(公告)号：JPH0696570A
公开(公告)日：1994-04-08
申请号：JP24297092
申请日：1992-09-11
申请人： HITACHI LTD
发明人： HANADA KAZUYOSHI , AMANO HIDEAKI , SOGABE CHIKAYUKI
IPC分类号： G11B33/14
摘要： PURPOSE:To scatter leaked grease by eliminating contact of wind with a bearing for oscillatorily holding a carriage on a shaft by providing an air cover on the bearing. CONSTITUTION:A spindle motor 5 is rotated at a high speed in an HDA at the time of operating to generate a flow of wind to be radially blown from a rotating center of the motor 5. A velocity of the wind near a carriage bearing 7a at this time can be reduced by providing an air cover 1b at a predetermined position of an inner surface of a base 12, and the wind is not brought into contact with the surface of the bearing 7a. Here, a gap between the cover 1 and the carriage 7 is reduced as much as possible thereby to prevent the wind. Then, influence of the wind in which grease of the bearing 7a tends to be scattered to cause a crush of a head is prevented to prevent leakage of the grease, thereby improving reliability.

8. 发明专利

JPS63100683A MAGNETIC HEAD FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS63100683A
公开(公告)日：1988-05-02
申请号：JP24529986
申请日：1986-10-17
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： SOGABE CHIKAYUKI , USHIJIMA NOBUYOSHI , HANADA KAZUYOSHI , YOKOYAMA NOBUTSUGU
IPC分类号： G11B21/21
摘要： PURPOSE:To decrease an access time by fitting a slider so as to be imbedded in a guide bar. CONSTITUTION:A spring characteristic is provided to a gimbal 22 holding the slider 21 is mounted directly to a guide bar 23 so as to fit the slider 21 in a way of being imbedded in the bar 23. Thus, the rigidity of the magnetic head is improved in any direction. Since the slider 21 is imbedded in the guide bar 23, the vibration due to wind or the like is evaded and no limitation is fed onto the direction of seek. Since the guide bar is mounted actually by the shortest distance up to the slider 21 of the magnetic head, the moment of inertia is reduced remarkably, resulting in decreasing the access time (positioning time).

9. 发明专利

JPH09282812A INFORMATION RECORDING AND REPRODUCING APPARATUS 失效
公开(公告)号：JPH09282812A
公开(公告)日：1997-10-31
申请号：JP8661396
申请日：1996-04-09
申请人： HITACHI LTD
发明人： HANADA KAZUYOSHI
IPC分类号： G11B21/02
摘要： PROBLEM TO BE SOLVED: To reduce the size of device by introducing a voice coil motor which is supported by a beam including a coil wound in almost vertical direction to the rotating direction of a carriage, a magnet arranged in almost parallel to the coil and a yoke. SOLUTION: A coil 9 is wound (vertical winding) in almost vertical direction to the rotating direction of a carriage 3. In the case of the device in the standard height, a larger rotating force of carriage 3 can be obtained by winding the coil in the direction of this embodiment. Moreover, the voice coil motor having a coil of the vertical winding structure is capable of moving a magnetic head 16 on a disk 5 at a higher speed when the rotating force of the carriage 3 is larger, resulting in the merit for high speed information processing.

10. 发明专利

JPH08321106A MAGNETIC DISK APPARATUS AND METHOD FOR CLAMPING MAGNETIC DISK 失效
公开(公告)号：JPH08321106A
公开(公告)日：1996-12-03
申请号：JP12653395
申请日：1995-05-25
申请人： HITACHI LTD
发明人： HANADA KAZUYOSHI , AMANO HIDEAKI , SHIMOZAKA HIDEAKI , KAWAGUCHI DAISUKE , BEPPU OSAMU , OKAZAKI TOSHIHISA , YAMAURA SATORU
IPC分类号： G11B17/028 , G11B17/02 , G11B17/038 , G11B23/00 , G11B25/04
摘要： PURPOSE: To obtain a magnetic disk apparatus and a clamping method for magnetic disks whereby a plurality of magnetic disks can be clamped while the flatness is maintained. CONSTITUTION: A magnetic disk 5 is clamped to a hub 6a by the use of a clamp ring 1 in the magnetic disk apparatus. An inner peripheral wall of the clamp ring 1 and an outer peripheral wall of the hub 6a engaged with the clamp ring are tapered on the side of the magnetic disk. The clamp ring 1 heated and expanded is meshed with the hub 6a. When the lamp ring is cooled and shrinks, the magnetic disk is virtually clamped to the hub. Alternatively, a stop ring is inserted between the clamp ring 1 and hub 6a to clamp the magnetic disk.

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