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1. 发明专利

JP2000298966A SUSPENSION FOR MAGNETIC HEAD 失效
公开(公告)号：JP2000298966A
公开(公告)日：2000-10-24
申请号：JP10620099
申请日：1999-04-14
申请人： HITACHI LTD
发明人： TAKAHASHI HARUHIDE , KOJIMA YASUO , SHIMIZU TAKEMASA , HIROSE SHINICHI , MATSUMOTO MASAAKI , HAMAGUCHI TETSUYA , ISHII TOMOKAZU
IPC分类号： G11B21/21 , G11B21/12 , G11B21/22
摘要： PROBLEM TO BE SOLVED: To surely realize loading/unloading by a suspension for magnetic head corresponding to a narrow disk space and to improve the reliability by reducing contact between a head and a disk at the time of unloading. SOLUTION: A lift tab 1 is formed in the front end part of a load beam 4, and hook 2 is formed by a flexure 3, and the contact position between the hook 2 and the load beam 4 is set to a position

2. 发明专利

JPH1186204A METHOD FOR TREATING PROJECTING PART OF MAGNETIC DISK SURFACE AND MAGNETIC DISK APPARATUS USING THE SAME 失效
公开(公告)号：JPH1186204A
公开(公告)日：1999-03-30
申请号：JP23699697
申请日：1997-09-02
申请人： HITACHI LTD
发明人： TAKENAKA TAKUJI , HIROSE SHINICHI , KAZAMA TOSHINORI , OTSUKA MASAKI
IPC分类号： G11B5/02 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To prevent read/write errors from being brought about later, by treating a disk surface to a state whereby a projecting part exceeding a predetermined height, namely, a potential defect point which is directly detected by an MR head at the normal use time does not become a new defect point. SOLUTION: When an MR head 22 comes in touch with a projecting part on a disk 1, a read signal output abnormality is brought about because of a thermal resistance change. A CPU 306 checks a signal level. When the level is not smaller than a reference value, the CPU controls a servo control circuit 305 to make an element part of the MR head 22 seek by a minute distance so that the element part is not in direct touch with the projecting part on the disk 1. Accordingly the element part of the MR head 22 is prevented from being damaged. Thereafter, the CPU controls the servo control circuit 305 to change a surface state of the projecting part on the disk 1 to a state whereby the part is not a fresh defect point (surface-treating to the projecting part). The treatment is determined in accordance with a range of trucks to be processed, etc.

3. 发明专利

JPH06314479A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH06314479A
公开(公告)日：1994-11-08
申请号：JP10397393
申请日：1993-04-30
申请人： HITACHI LTD
发明人： HIROSE SHINICHI
IPC分类号： G11B21/21
摘要： PURPOSE:To make yaw angles of a read head and a write head constant irrespective of track position by providing a yaw angle adjusting means using a piezoelectric ceramic in a mechanism for positioning dual head. CONSTITUTION:When seek operation is performed to the inner circumferential side by the head positioning mechanism 1, an extension and contraction member 2a is extended, and an extension and contraction member 2b is contracted. Then, a flexible member 3 is deformed, and a head supporting system fitted to a rigid body 4 is rotated, and consequently, the yaw angle of the dual head becomes an angle to conform a straight line connecting both geometrical centers of the read head and the write head with a track tangential line in a head position. On the contrary, when seek operation is performed to the outer circumferential side, the member 2a is contracted, and the member 2b is extended to adjust the yaw angle to become the angle to conform the straight line connecting the geometrical centers of the read head and the write head with the track tangential line in the head position.

4. 发明专利

JPH06174413A DETECTING DEVICE FOR RELATIVE RELATION OF OBJECT FACE 失效
公开(公告)号：JPH06174413A
公开(公告)日：1994-06-24
申请号：JP32914492
申请日：1992-12-09
申请人： HITACHI LTD
发明人： IKEDA YUTAKA , YOSHIDA SHINOBU , HIROSE SHINICHI
IPC分类号： G01B9/02 , G01P3/36
摘要： PURPOSE:To detect the relative displacement or relative speed of object faces and radiate the light at the desired positions of the object faces with an optical interferometer detecting the relative displacement or relative speed between multiple object faces in noncontact optically. CONSTITUTION:A detecting device is constituted of an optical interferometer 21 optically detecting the relative displacement or relative speed of objects, a fine region light collecting device 12 arranged with an optical lens collecting multiple beams to fine regions of the object faces and having a fine adjusting device so that the optical lens optical axis is made perpendicular to the object faces and formed so that the focal point of a beam group 13 coincides with the focal point of the optical lens, and a device detecting the beam spot position of collected multiple beams.

5. 发明专利

JPH05149287A PACKAGE TYPE SCREW COMPRESSOR 失效
公开(公告)号：JPH05149287A
公开(公告)日：1993-06-15
申请号：JP31076891
申请日：1991-11-26
申请人： HITACHI LTD , HITACHI TSUCHIURA ENG KK
发明人： TSURU SEIJI , FUJIWARA MITSURU , HIROSE SHINICHI
IPC分类号： F04C18/16 , F04C28/28 , F04C29/00 , F04C29/04
摘要： PURPOSE:To prevent adhesion of scale or deposit of foreign substance on the inner wall of the cooling jacket of a compressor main body, so as to prevent deterioration in cooling effect. CONSTITUTION:A cooling jacket 6 is provided in the casing 1 of a compressor main body, and a refrigerant flow passage 28 to feed refrigerant to the cooling jacket 6 is provided. This package type screw compressor is constituted so that the refrigerant flow passage 28 is constituted into a closed circuit, and a heat exchanger 9 for refrigerant to cool refrigerant and a refrigerant feed pump 10 to circulate refrigerant in the package are provided in this refrigerant flow passage 28.

6. 发明专利

JPH04109469A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH04109469A
公开(公告)日：1992-04-10
申请号：JP22531290
申请日：1990-08-29
申请人： HITACHI LTD
发明人： HIROSE SHINICHI
IPC分类号： G11B21/21
摘要： PURPOSE:To reduce the wear of a magnetic disk by providing a mechanism to make the yawing angle of a magnetic head slider large at the time of contact start/stop (CSS). CONSTITUTION:When the rotation of the magnetic disk 1 reaches a rated number of revolution, an actuator 7 moves, and the yaw angle 5 attached to an inner periphery side slider 4 is made small so as to fix the motion of the actuator 7 in a lateral direction at the time of the operation of a magnetic disk device, and after that, it acts as the actuator of a usual rotary type. At the time of the operation of the magnetic disk device, a slider moves in a range from the inner periphery side slider 4 at the time of the operation of the magnetic disk device to an outer periphery side slider 6 at the time of the operation of the magnetic disk device. Accordingly, at the time of the CSS, the slider yawing angle is large, and the floating characteristic of the magnetic head slider is never impaired. Thus, the wear of the magnetic disk can be reduced.

7. 发明专利

JPH11324963A PRESSURE CONTROL METHOD FOR SCREW COMPRESSOR 失效
公开(公告)号：JPH11324963A
公开(公告)日：1999-11-26
申请号：JP12258398
申请日：1998-05-06
申请人： HITACHI LTD
发明人： OKITA JUNJI , KANEZAKI KAZUYA , HIROSE SHINICHI
IPC分类号： F04C28/26 , F04B49/06 , F04C28/06 , F04C28/24 , F04C29/12 , F04C29/10
摘要： PROBLEM TO BE SOLVED: To improve the energy saving while preventing the operation at an unnecessary high pressure in a low operation load (flow consumption). SOLUTION: This compressor is provided with a control device for operating a four-way solenoid valve 24 with an ON/OFF control valve (intake valve 13) provided in an intake side of a screw compressor in response to the pressure detected by a pressure detecting unit 3, and the full load operation or the non- load operation is performed. In this case, flow consumption is computed on the basis of the total of the full load operation time within the predetermined time, and the upper limit pressure set value (Pmax, P'max) and a lower limit pressure set value (Pmin, P'min) of the discharge pressure are automatically adjusted so as to obtain a constant terminal pressure in a gas flow line 19.

8. 发明专利

JPH1011906A MAGNETIC DISK APPARATUS 失效
公开(公告)号：JPH1011906A
公开(公告)日：1998-01-16
申请号：JP16271796
申请日：1996-06-24
申请人： HITACHI LTD
发明人： HIROSE SHINICHI
IPC分类号： G06F3/06 , G11B5/09 , G11B20/12 , G11B20/18
摘要： PROBLEM TO BE SOLVED: To correct all data errors including data errors brought about suddenly upon the application of an impact force, etc., in a magnetic disk apparatus. SOLUTION: A used sector allocation table and a redundant sector table to be controlled by a magnetic disk controller 2 are provided. Redundant data and an objective redundant sector on a magnetic disk based on the tables are arranged at physically different positions in a radial and a circumferential directions. Data sectors and redundant data sectors are set so as not to be damaged at the same time even if an excessive impact force is input, etc. Accordingly, all data errors including data errors brought about suddenly can be corrected.

9. 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.

10. 发明专利

JPH07312049A METHOD AND DEVICE FOR MEASURING FLOATING VARIABLE OF MAGNETIC HEAD 失效
公开(公告)号：JPH07312049A
公开(公告)日：1995-11-28
申请号：JP12687294
申请日：1994-05-17
申请人： HITACHI ELECTR ENG , HITACHI LTD
发明人： ISHIMORI HIDEO , HIROSE SHINICHI , KOIZUMI MITSUYOSHI , AIKO KENJI
IPC分类号： G01B11/14 , G11B5/455 , G11B21/21
摘要： PURPOSE:To provide method and device for measuring a floating variable capable of analyzing its behavior for various sized heads. CONSTITUTION:A light emission system 6 projects light spots to three points Pa, Pb, Pc on the slider surface 11 of the head 1. A light reception system 7 is provided with light receiving parts 75a, 75b, 75c receiving an interference beam of three points and outputting the measurement data of respective floating variables deltaz. A data processing part 8 forms and processes the time sequential data from respective measurement data to output the behavior data of the head 1.

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