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1. 发明专利

JP2009301656A Magnetic disk device 审中-公开
标题翻译：磁盘设备
公开(公告)号：JP2009301656A
公开(公告)日：2009-12-24
申请号：JP2008155617
申请日：2008-06-13
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OTAKE TOMONAO , WATANABE KEIKO , SHIMIZU TOSHIHIKO , NAKAMURA SHIGEO
IPC分类号： G11B33/12 , G11B25/04 , G11B33/14
摘要： PROBLEM TO BE SOLVED: To improve a magnetic disk device, in particular its impact resisting performance in the rotating shaft direction of the magnetic disk.
SOLUTION: A rear face of a base plate 3 has protruding edge portions 10A, 10B, a circular protrusion 12, and at least one rib 13. The rib 13 is placed along a longitudinal direction of the base plate 3, in between a position corresponding to a spindle and that corresponding to an actuator. A circuit board 20 is mounted on the rear face of the base plate 3. The circuit board 20 is equipped with a circular hole 22 of which the inside diameter is slightly larger than the outside diameter of the circular protrusion 12.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提高磁盘装置，特别是其在磁盘的旋转轴方向上的抗冲击性能。解决方案：基板3的后表面具有突出的边缘部分10A，10B，圆形突起12和至少一个肋13.肋13沿基板3的纵向方向放置在对应于主轴并对应于致动器的位置。电路板20安装在基板3的背面上。电路板20装有圆形孔22，其内径略大于圆形突起12的外径。版权所有：（C）2010，JPO＆INPIT

2. 发明专利

JPH01125786A HERMETICALLY SEALED TYPE MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH01125786A
公开(公告)日：1989-05-18
申请号：JP28372787
申请日：1987-11-10
申请人： HITACHI LTD
发明人： HIROSE SHINICHI , WATANABE KEIKO
IPC分类号： G11B33/14
摘要： PURPOSE:To keep cleanliness in a sealed vessel at a high level by housing a magnetic disk and a magnetic head slider in the sealed vessel, and decompressing the inside of the sealed vessel. CONSTITUTION:After the magnetic disk 2 and the magnetic head slider 3 are housed in the sealed vessel 1, the pressure reduction of the inside of the sealed vessel 1 is performed by a decompression pump 5. Thereby, a water content in the sealed vessel 1 is reduced, and the water content invading in a micro cavity between the magnetic head slider 3 and the surface of the magnetic disk 2 evaporates. Therefore, the adhesion of the magnetic head slider 3 with the magnetic disk 2 can be prevented, and it is possible to release the adhesion immediately even when the adhesion is generated, and to keep the cleanliness in the inside of the hermetically sealed vessel at the high level.

3. 发明专利

JP2004246974A Magnetic disk device, slider, and assembly of magnetic head support mechanism 审中-公开
公开(公告)号：JP2004246974A
公开(公告)日：2004-09-02
申请号：JP2003035927
申请日：2003-02-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MATSUDA YASUHIRO , NISHIMURA YUJI , WATANABE KEIKO , SHIMIZU TOSHIHIKO
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a magnetic disk device wherein noise is small by reducing the collision sound of a dimple part during unloading.
SOLUTION: This device is provided with a regulation part 25a for regulating a space between a slider 4 and a suspension 22, and a spring part 23b for energizing the formation part of a dimple 23 so as to bring the dimple 23 into contact with gimbals 25 attached to the backside of the slider 4.
COPYRIGHT: (C)2004,JPO&NCIPI

4. 发明专利

JP2004086962A Magnetic disk device 审中-公开
公开(公告)号：JP2004086962A
公开(公告)日：2004-03-18
申请号：JP2002244510
申请日：2002-08-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： WATANABE KEIKO
IPC分类号： G11B25/04
摘要： PROBLEM TO BE SOLVED: To provide a method for reducing the vibration of a disk and an actuator caused by a fluid force following disk rotation without increasing power consumption/costs.
SOLUTION: A spoiler 8c is disposed so as to be turnable horizontally to a disk surface 1 installed in a casing and supported by a rotary shaft, and linked with the operation of an actuator. When a slider is positioned in a disk inner peripheral position of a disk, on an inner peripheral side more than a half of a disk data area, the spoiler 8c is not on the disk. Alternatively, when the slider is positioned in the outer peripheral position of the disk 1 from an unload point: at a radial position in the region outside at least 75% from a disk outer diameter, the spoiler 8c is inserted on the disk 1.
COPYRIGHT: (C)2004,JPO

5. 发明专利

JP2000132937A RAMP-LOAD-TYPE MAGNETIC DISK DEVICE 失效
公开(公告)号：JP2000132937A
公开(公告)日：2000-05-12
申请号：JP30216098
申请日：1998-10-23
申请人： HITACHI LTD
发明人： WATANABE KEIKO , HAMAGUCHI TETSUYA , SHIMIZU TOSHIHIKO
IPC分类号： G11B23/50 , G11B5/54 , G11B21/12 , G11B21/22
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive and reliable magnetic disk device with high density that prevents the abrasion powder of a traveling path and a sliding tab from dropping onto a magnetic disk even when repeating load/unload operation in the ramp-load-type magnetic disk device. SOLUTION: After unloading operation, a groove 9 is provided at the home position of a traveling path 1 where a magnetic head support means is retracted. Also, the magnetic head support means is vibrated at a low-frequency by the groove part 9. Also, a region for accumulating abrasion powder being deposited at the groove part 9 is provided. A method allows the abrasion powder of a ramp and a sliding tab being generated by repetition operation to be eliminated by a simple method, and prevents the abrasion powder from dropping onto the magnetic disk, thus improving the reliability of load/unload operation and the low-floating reliability of a magnetic head slider, and hence inexpensively supplying a magnetic disk device with high-recording density.

6. 发明专利

JPH11297014A RETRACTING METHOD AND MAGNETIC DISK DRIVE 失效
公开(公告)号：JPH11297014A
公开(公告)日：1999-10-29
申请号：JP10084798
申请日：1998-04-13
申请人： HITACHI LTD
发明人： WATANABE KEIKO , HAMAGUCHI TETSUYA , YOSHIDA TAKASHI
IPC分类号： G11B21/12 , G11B5/55
摘要： PROBLEM TO BE SOLVED: To provide a lamp loading type magnetic disk drive with high reliabil ity which suppresses lamp damage by a retraction system capable of secure unloading by making the speed of a lamp collision sufficiently low even when power supply is stopped. SOLUTION: This retracting method has a means which supplies electric power to the driving circuit of an actuator assembly with three stages of time differences when the power supply is stopped. At the 1st time, electric power which stops the actuator is supplied. Then the actuator assembly starts retracting operation at a sufficiently slow speed with small electric power of the 2nd time and moves to nearby a lamp. Then electric power of the 3rd time is supplied and the assembly is retracted securely to a specific retraction position. The speed of a collision against the lamp can be set sufficiently low, so damage to the lamp can be reduced.

7. 发明专利

JPH11120723A SERVO INFORMATION WRITING DEVICE 失效
公开(公告)号：JPH11120723A
公开(公告)日：1999-04-30
申请号：JP27550397
申请日：1997-10-08
申请人： HITACHI LTD
发明人： HAMAGUCHI TETSUYA , YAMAMOTO YUKIO , WATANABE KEIKO
IPC分类号： G11B21/10
摘要： PROBLEM TO BE SOLVED: To provide a servo information writing device and a writing method for writing high-quality servo information without increasing tact time and without being affected by the vibration of a magnetic disk device itself. SOLUTION: This device is provided with a first reflection mirror 1 moved together with a magnetic head for recording servo information and a laser length gauge for irradiating the first reflection mirror 1 with a laser light and measuring the position of the magnetic head from its reflected light. In a position opposite the first reflection mirror on the magnetic disk device, a second reflection mirror 2 having inclination of 45 deg. is provided, and the measuring light of the laser length gauge is made incident on the first reflection mirror via the second reflection mirror 2.

8. 发明专利

JPH1186484A HEAD SLIDER AND MAGNETIC RECORDER 失效
公开(公告)号：JPH1186484A
公开(公告)日：1999-03-30
申请号：JP24536997
申请日：1997-09-10
申请人： HITACHI LTD
发明人： ARISAKA HISAHIRO , HAMAGUCHI TETSUYA , WATANABE KEIKO , SHIMIZU TOSHIHIKO
IPC分类号： G11B21/21 , G11B5/60 , G11B11/10 , G11B11/105
摘要： PROBLEM TO BE SOLVED: To realize the stable contact between a magnetic head and a disk and to provide a reliable magnetic disk having high density and large capacity by preventing the forward falling of a sliding surface and the generation of unstable vibration or local strain caused by the frictional force between a record medium and the sliding part of a slider. SOLUTION: An element pad 5 is connected in order of a hinge 11, an intermediate rigid part 10 and a hinge 9 from the upstream side in the moving direction of the record medium and supported in cantilever from a slider base 12. Sliding pads 6, 7 are similarly supported in cantilever independently. The intersected point of the disk surface with an extended line of a virtual line connecting each center of the hinges 9 and 11 exists on the upstream side in the moving direction of the disk from the end of the upstream side of the sliding surface. When the frictional force is exerted, the supporting mechanism is displaced in the direction that the hinge 9 is separated from the disk while the whole body is extended in the sliding direction, thereby decreasing the pressing load. Also, the end of the upstream side of the sliding surface is displaced in the direction separating from the disk, then the forward falling does not occur. Consequently, the magnetic disk device capable of performing the stable sliding of the head slider is obtained.

9. 发明专利

JPH10112152A MAGNETIC HEAD SLIDER AND MAGNETIC DISK 失效
公开(公告)号：JPH10112152A
公开(公告)日：1998-04-28
申请号：JP26698296
申请日：1996-10-08
申请人： HITACHI LTD
发明人： SHIMIZU TOSHIHIKO , HAMAGUCHI TETSUYA , WATANABE KEIKO , ARISAKA HISAHIRO
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To enable stable running, to minimize an interval between a head and a disk, to improve recording density and to enhance reliability by providing plural pieces of specified shaped projecting parts having flat parts of a prescribed total area on a surface opposite to the magnetic disk. SOLUTION: The projecting parts 3 having the flat part 6 of 100×100μm and provided with a flowing force generating taper part 7 are arranged on both the ends of the front end part of a slider 2 loading a magnetic head, and the projecting part 5 having the flat part of the same area is provided on the rear end part. The floating force by the taper part 7 is made smaller than a component acting to the projecting part 3 of pressing load to be made hardly part from a disk surface. Further, the flat surfaces of three projecting parts are made the same plane, and a gap between the read element 4 of the projecting part 5 and the disk surface is eliminated. Thus, friction force acting to the projecting parts 3 are reduced, and the moment making fall forward the slider 2 is reduced, and the slider 2 is glided smoothly, and the projecting parts 3 and the disk surface are reduced from wear and a damage, and the reliability is improved.

10. 发明专利

JPH1097773A MAGNETIC DISK UNIT 失效
公开(公告)号：JPH1097773A
公开(公告)日：1998-04-14
申请号：JP24976096
申请日：1996-09-20
申请人： HITACHI LTD
发明人： SHIMIZU TOSHIHIKO , YOSHIDA SHINOBU , HAMAGUCHI TETSUYA , WATANABE KEIKO , ARISAKA HISAHIRO , MORI KENJI
IPC分类号： G11B21/16 , G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To reduce a flutter error by moving a slider to the inner circumferential side of a magnetic disk when the disk is bent to the side of the slider and moving the slider to the outer circumferential side of the disk when the disk is bent to the side opposite to the slider. SOLUTION: The slider 2 mounted with a magnetic head for the purpose of sliding on the magnetic disk is bonded and fixed to a tip part of a suspension 3, and the suspension 3 is fixed to a tip part of a supporting arm 4. A space between the suspension 3 and the magnetic disk 1 is provided to be smaller on the inner circumferential side of the magnetic disk and larger on the outer circumferential side by inclining the suspension 3. The tip part of the suspension 3 and the slider 2 are moved to the inner circumferential side of the magnetic disk 1 when the disk 1 is bent to the side of the slider 2, and are moved to the outer circumferential side when the disk is bent to the opposite side. By disposing the slider 2 to perform the above-mentioned operation, the flutter error can thus be corrected and reduced.

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