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71. 发明专利

JPS628864B2 失效
公开(公告)号：JPS628864B2
公开(公告)日：1987-02-25
申请号：JP8146180
申请日：1980-06-18
申请人： HITACHI LTD
发明人： KINUMEGAWA ISAO , NAKAKOSHI KAZUO , NARUSE ATSUSHI
IPC分类号： G11B21/02 , G11B21/16

72. 发明专利

JPS61218353A ACCESS MECHANISM FOR MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS61218353A
公开(公告)日：1986-09-27
申请号：JP5585885
申请日：1985-03-22
申请人： HITACHI LTD
发明人： SUZUKI MASAMI , TAKAHASHI TAKESHI , NISHIDA HIROSHI , AZUMA MIKIO , NARUSE ATSUSHI
IPC分类号： H02K33/18 , H02K41/035
摘要： PURPOSE:To always make the conversion rate on current/power-factor be constant and suppress power consumption and contrive high speed, by changing the winding density of a coil along the driving direction, on a voice coil motor for positioning a magnetic head to drive. CONSTITUTION:On an access mechanism fitting a voice coil motor of long coil system on a magnetic head 11 and controlling the positioning along the access direction 12, the winding density per unit length of the coil 1 of the voice coil motor is arranged to be changed along the access direction 12. For the state of the change, the winding density should be arranged to be increased on the tip side of the coil 1 ( the side opposite to the magnetic head 11). As the result, in spite of the relative position between the coil 1 and magnetic circuits (2, 4, 6, 7), a driving force can be constant, and so consumption of power is reduced, and high speed access can be realized.

73. 发明专利

JPS6139975A Spindle assembly for magnetic disc 失效
标题翻译：用于磁盘的主轴组件
公开(公告)号：JPS6139975A
公开(公告)日：1986-02-26
申请号：JP16245084
申请日：1984-07-31
申请人： Hitachi Ltd
发明人： NISHIDA HIROSHI , YAMAMOTO FUJIO , AZUMA MIKIO , NARUSE ATSUSHI
IPC分类号： G11B17/038 , G11B19/20
CPC分类号： G11B17/038 , G11B19/20
摘要： PURPOSE: To assemble upper and lower bearings with a degree of alignment with ultrahigh accuracy by contacting a hub reference face and a housing reference face and making an axial center in this case coincident with bearing center of an other housing.
CONSTITUTION: A shaft 21 fixed with a hub 26, a bearing 28 and a pre-load spring 29 are mounted in one housing 15 and the hub 26 is moved axially by the operation of the spring 29. Through the operation above, the axial direction reference face 36 of the hub 26 and the housing reference face 35 finished with the squareness of 0.005mm to the lower bearing mating part are contacted. The shaft center of the shaft 21 is taken as a reference and not moved, and the center of the bearing 19 of the upper housing 16 is made coincident to the center of the shaft 21 and then assembled. Thus, the alignment of the upper/ lower bearings is improved from 0.06mm (conventional value) to a value as highly accurate as ≥0.01mm for the assembling.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过接触轮毂基准面和外壳基准面，通过接触一个轴承中心与另一个外壳的轴承中心重合，以高精度对准上下轴承。构成：固定有轮毂26，轴承28和预载弹簧29的轴21安装在一个壳体15中，轮毂26通过弹簧29的操作而轴向移动。通过上述操作，轴向方向轮毂26的参考面36和壳体基准面35以0.005mm的矩形精加工。与下轴承配合部分接触。轴21的轴心作为基准而不移动，并且上壳体16的轴承19的中心与轴21的中心重合，然后组装。因此，上/下轴承的对准由0.06mm提高。（常规值）高达±0.01mm的高精度值。用于组装。

74. 发明专利

JPS6055906B2 失效
公开(公告)号：JPS6055906B2
公开(公告)日：1985-12-07
申请号：JP8940084
申请日：1984-05-07
申请人： HITACHI LTD
发明人： NISHIDA HIROSHI , NAKAKOSHI KAZUO , NARUSE ATSUSHI , MOTOYOSHI KUNIHIRO
IPC分类号： G11B21/12

75. 发明专利

JPS5987678A MAGNETIC DISK ROTATING DEVICE 失效
公开(公告)号：JPS5987678A
公开(公告)日：1984-05-21
申请号：JP19827182
申请日：1982-11-10
申请人： HITACHI LTD
发明人： HIRANO YOSHIYUKI , YAMAMOTO FUJIO , NARUSE ATSUSHI , KAWAKAMI SHIYUU
IPC分类号： G11B25/04 , G11B17/038
摘要： PURPOSE:To enable writing of servo track in a state of reduced vibration and to balance simply rotation by providing an assembly containing a disk, parts that fix the disk to a rotation shaft and a bearing, and attaching and detaching the assembly in a body. CONSTITUTION:A hub 4 pressed into a rotation shaft 34, a disk 30, and a spindle housing 35 are constructed in a body as an assembly and fixed detachably to the base 37 of a magnetic device. Writing of servo track is performed by attaching the housing 35 to the base of a servo track writer. Rotation can be balanced simply by mounting on a balancer. The disk 30 is screwed 33 to the hub 4 by a clamp ring 32. The shaft 34 is rotatably attached to the housing 35 through a ball bearing.

76. 发明专利

JPS5794962A MAGNETIC DISK STORAGE DEVICE 失效
公开(公告)号：JPS5794962A
公开(公告)日：1982-06-12
申请号：JP16961780
申请日：1980-12-03
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： NARUSE ATSUSHI , MOTOYOSHI KUNIHIRO , IIZUKA TAKASHI , KANEKO REIZOU , MITSUYA YASUNAGA
IPC分类号： G11B33/08 , G11B5/54 , G11B21/02 , G11B25/04
摘要： PURPOSE:To absorb vibration by an actuator by providing a dampling mechanism, consisting of more than one damping ball arranged in airtight space, on a voice coil motor. CONSTITUTION:Access to a disk device 4 is attained by applying electric power to a coil bobbin 7 and then driving a head arm 9 by a voice motor. At this time, vibration generated by a rotary actuator is absorbed through the movement of lead balls in a damping mechanism 10 provided on a carriage block 12, thus positioning a head with high precision.

77. 发明专利

JPS578967A PIVOT SUPPORTING DEVICE OF MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS578967A
公开(公告)日：1982-01-18
申请号：JP8146280
申请日：1980-06-18
申请人： HITACHI LTD
发明人： KINUMEGAWA ISAO , OOTA SATORU , NAKAKOSHI KAZUO , NARUSE ATSUSHI
IPC分类号： G11B21/02 , F16C25/08 , G11B5/54
摘要： PURPOSE:To speed up access by providing a top, which contacts with the top of a needlelike roller bearing, in the hollow part of a pivot fixed to a carriage body and by inserting a leaf spring into the top with respect to a swing arm system. CONSTITUTION:A top 7 has an axial notch 9 for leaf spring insertion in its back surface 7a, and a leaf spring 10 is inserted into it. In the center of the axial flank 6a of the hollow part 6 of a pivot 3, a notch 11 wherein a pin 12 is inserted is provided. The supporting structure of this pivot 3 provides a stable spring constant over the large displacement range of the pivot, and the top 7 supports the pivot 3 as if it were supported at a fixed terminal.

78. 发明专利

JPS56137559A MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS56137559A
公开(公告)日：1981-10-27
申请号：JP3893780
申请日：1980-03-28
申请人： HITACHI LTD
发明人： YAMAMOTO FUJIO , NAKAKOSHI KAZUO , NARUSE ATSUSHI
IPC分类号： G11B33/14 , G11B25/04
摘要： PURPOSE:To prevent a disc from oscillation and thermal displacement, by providing the spoiler which covers the magnetic disc in a sector shape in the case tightly enclosing a plurality of magnetic discs to turn on a common shaft and passes to external air. CONSTITUTION:A plurality of magnetic discs 4 and actuators 3 located on the common axis 6 on the base 12 are provided and contained in an enclosed case. Sector type spoilers 10, 11 are located between magnetic disc 4 and fixed to the base 12. Since the spoilers 10, 11 are passed through external air, the heat produced through the rotation of the magnetic disc 4 is dissipated externally. Thus, the oscillation of the magnetic disc 4 and the thermal displacement can be prevented.

79. 发明专利

JPS5647970A MAGNETIC DISK DRIVER 失效
公开(公告)号：JPS5647970A
公开(公告)日：1981-04-30
申请号：JP12268979
申请日：1979-09-26
申请人： HITACHI LTD
发明人： NARUSE ATSUSHI , NAKAKOSHI KAZUO
IPC分类号： G11B33/14 , G11B23/02 , H05K7/20
摘要： PURPOSE:To miniaturize and stabilize a device by effectively cooling insides of a disk storage part and device enclosure by providing a motor pulley with fins for exhausting air in the enclosure and also a spindle pulley with fins at the storage part. CONSTITUTION:Motor pulley 60 is provided with fins for exhausting air inside of enclosure 11, and spindle pulley 50 with fins for cooling disk storage part 2. The rotation of drive motor 7 is transmitted to pulley 50 via pulley 60 and belt 8 and fins of pulley 50 blow air flow to base 16 of storage part 2, cooling the inside of storage part 2. Further, air flowing in enclosure 11 by fins of pulley 50 is exhausted out of enclosure 11 by fins of pulley 60 equipped on spindle 80 to cool the inside of enclosure 11. Thus, pulleys and fins are formed in one body, so that the cooling of the storage part can be carried out effectively.

80. 发明专利

JPS5545106A POSITIONING METHOD FOR FLOPPY DISK 失效
公开(公告)号：JPS5545106A
公开(公告)日：1980-03-29
申请号：JP11651578
申请日：1978-09-25
申请人： HITACHI LTD
发明人： NISHIDA HIROSHI , NAKAKOSHI KAZUO , NARUSE ATSUSHI , MAEDA MUNESHIGE
IPC分类号： G11B17/03 , G11B17/34
摘要： PURPOSE:To make highly-reliable and stable recording and reproduction possible by applying adequate strain to a floppy disk by pushing the external case of the floppy disk against two reference surfaces differing in height. CONSTITUTION:External case 2 of a floppy disk is pushed against two reference surfaces 14 and 15 differing in height by depressing member 10 through elastic member 11. Then, floppy disk 1 is applied with constant strain 21 near long hole 3 for recording and reproduction and, in consequence, floppy disk 1 increases in rigidity, preventing the disk in rotation from fluttering. Strain 12 occurring near disk center hole 6 due to chattering is reduced greatly, so that the magnetic head can come in stable contact even at an internal circumference side. In this way, stable recording and reproduction can be attained.

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