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81. 发明专利

JPS6295779A ACTUATOR SHOCK ABSORBER FOR MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS6295779A
公开(公告)日：1987-05-02
申请号：JP23512685
申请日：1985-10-23
申请人： HITACHI LTD
发明人： SUZUKI MASAMI , NISHIDA HIROSHI , TAKAHASHI TAKESHI , NARUSE ATSUSHI
IPC分类号： G11B21/02 , G11B21/12
摘要： PURPOSE:To obtain an ideal shock-absorbing characteristic of the titled shock absorber by constituting its shock-absorbing member with a spring made of a superelastic alloy. CONSTITUTION:If an actuator 1 is run away in the direction of arrow X1, a stopper plate 12 fixed on the actuator 1 with a screw hits against the flange 11a of a second stopper member 11, then the stopper member 11 shifts in the same direction. And the coil spring 9 made of Ni-Ti alloy deflects further than its initial bending deltas to convert the impact energy of the actuator 1 into the elastic energy and absorb it, by which the actuator 1 is bufferingly stopped. In this case, the coil spring 9 deflects, for instance, for a distance Xs and absorbes the impact energy corresponding to an area As. Even though the spring 9 bends, its elastic force does not change but is maintained at fs. A breakage of the actuator 1 likely when elastically stopping it can be exactly prevented from occurring even when the speed of the actuator 1 is fast.

82. 发明专利

JPS6280881A VOICE COIL MOTOR IN MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS6280881A
公开(公告)日：1987-04-14
申请号：JP22004085
申请日：1985-10-04
申请人： HITACHI LTD
发明人： KATO KENJI , NISHIDA HIROSHI , SUZUMOTO MASAMI
IPC分类号： H02K3/04 , G11B21/02
摘要： PURPOSE:To attain high speed access by providing a radiation fin to a coil of a voice coil motor so as to increase the coil heat radiation area thereby decreasing the temperature rise. CONSTITUTION:A coil 1 and a magnetic circuit 15 constitute a voice coil motor. Then in flowing a current to the coil 1, an electromagnetic force is exerted to the coil 1 to drive an actuator 6 in the direction of arrow 9. That is, the coil is positioned at a specific position of the magnetic head 8 by using a current subject to feedback control by position information detected by >=1 magnetic head in the heads 8. Then the coil heat radiation area is increased remarkably by the heat radiation fin 10 provided to the coil to lower the temperature rise of the coil 1 and the torque is increased to attain high speed access.

83. 发明专利

JPS6278780A METHOD FOR ASSEMBLING ACTUATOR FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS6278780A
公开(公告)日：1987-04-11
申请号：JP19586885
申请日：1985-09-06
申请人： HITACHI LTD
发明人： SUZUKI MASAMI , NISHIDA HIROSHI , TAKAHASHI TAKESHI , NARUSE ATSUSHI
IPC分类号： G11B21/02
摘要： PURPOSE:To attain a compact and thin design of a magnetic disk device together with large capacity by abutting a guide element attached previously on a guide rail to support this guide element by a tool so that a prescribed angle is secured between a reference attachment surface for magnetic head and fixing another guide element to an actuator after abutting on the guide rail. CONSTITUTION:An actuator 4 is provided with guide rollers 7a, 7b and 8b abutting on a guide rail 6 having an approximately arc shaped section and also provided with rollers 11a, 11b abutting or a guide rail 10 having an approximately arc-shaped section. Then a positioning tool 13 is fixed on the rail 6 so that a reference surface 13a is set vertical to the rails 6, and the actuator 3 is pressed to the tool 13 so that an entire attachment surface 4a is attached close to the surface 13a to secure the restricted support. Under such condition, a shaft 12a of a guide rollers 12 is inserted into an attachment hole 4b and an outer wheel 12b is abutted on the rail 6. Then an adaptor 14 for pre-pressure is attached to the roller 12 and therefore the wheel 12b is pressed to the rail 6 by the pre-pressure of a spring 16. Under such conditions, the shaft 12a is fixed into the hole 4b by means an adhesive.

84. 发明专利

JPS628381A MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS628381A
公开(公告)日：1987-01-16
申请号：JP14650885
申请日：1985-07-05
申请人： HITACHI LTD
发明人： NISHIDA HIROSHI , SUZUKI MASAMI , TAKAHASHI TAKESHI , NARUSE ATSUSHI
IPC分类号： G11B21/12
摘要： PURPOSE:To obtain the equal load conditions without depending upon the positioning position of an actuator by making the material of the spring for retracting into a super elastic alloy. CONSTITUTION:A super elastic Ni-Ti alloy is used for the material of a spring 19 for retracting. The character of an elastic area 20 is the same as that of the general metal, and the material has its features for a plastic area 21. Namely, in case of the general metal, when distortion is increased up to the plastic area, the distortion remains as it does, and when the load of a super elastic alloy is removed, the deforming distortion disappears and the alloy is returned to the original condition. In short, when the main alloy is used at the plastic area, the spring can be obtained in which the spring constant is very small and the sufficient force can be generated. When this is used as the retracting spring, almost a constant load torque can be obtained without depending upon the positioning position of the disk.

85. 发明专利

JPS61292265A MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS61292265A
公开(公告)日：1986-12-23
申请号：JP13179585
申请日：1985-06-19
申请人： HITACHI LTD
发明人： NISHIDA HIROSHI , SUZUKI MASAMI , TAKAHASHI TAKESHI , NARUSE ATSUSHI , KIMURA HIDEYUKI
IPC分类号： G11B33/14 , G11B19/20
摘要： PURPOSE:To obtain a small-sized and low-cost voice coil motor by delivering forcibly an air flow generated through the rotation of a disc to a voice coil motor gap to improve heat dissipation performance on the surface of the coil. CONSTITUTION:A spindle rotating a magnetic disc 1 is driven by a motor 3 and an actuator consists of a carriage 19 mounting a magnetic head 18 and a coil 9 of a voice coil motor. The air flow produced by the rotation of the disc 1 is exhausted from an air outlet 4 having a reference face of a housing 2, fed to the voice coil motor gap 16 passing through the actuator, and is returned into the housing from an air-intake 6 through a duct 17 provided in the inside of a magnetic circuit 14 and a filter 21 in a duct 20 provided to a cover 12. Thus, a high-speed air flow is generated in the gap 16 and the heat dissipation performance of the coil 9 is improved remarkably.

86. 发明专利

JPS61196475A ACTUATOR FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS61196475A
公开(公告)日：1986-08-30
申请号：JP3635685
申请日：1985-02-27
申请人： HITACHI LTD
发明人： NISHIDA HIROSHI , SUZUKI MASAMI
IPC分类号： H02K33/18 , G11B21/02
摘要： PURPOSE:To delete a deterioration of accuracy in positioning by a deformation of a guide rail by dividing the guide rail into two and disposing them at a front and a back section along a moving direction fixing by one screw. CONSTITUTION:At an inside of a U grooved rail housing 4, a pair of stages for fixing a guide rail are disposed. At the stages, two pairs of guide rails divided into two at a front and a back sections are fixed by screws 16. Since the guide rail 10 is comparatively short, a strightness accuracy can be especially worked with high precision. Even the fixing with one screw 16, the guide rail is fully fixed and contacted closely to a rail housing 4. A clearance is generated in a boundary section of the front and the back guide rails 10 but a bearing 17 supporting a carriage 8 does not drop into this clearance by a movement of the front and the back sections of the carriage.

87. 发明专利

JPS61165874A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS61165874A
公开(公告)日：1986-07-26
申请号：JP567285
申请日：1985-01-18
申请人： HITACHI LTD
发明人： AZUMA MIKIO , NISHIDA HIROSHI , SUZUKI MASAMI , SENDA TOMOHISA , OTSUKA KIYOMITSU
IPC分类号： G11B23/03 , G11B17/02 , G11B17/038 , G11B23/00 , G11B25/04
摘要： PURPOSE:To reduce the revolving unbalance degree of a spindle rotor for a magnetic disk and to obtain a highly accurate spindle, by loading magnetic disks laminated onto a spindle with a gap formed between a spaser and a hub deflected at positions opposite to each other by 180 deg. for each disk. CONSTITUTION:A spindle part contains a hub 7 to which magnetic disks 1 and spacers 8 are laminated, a clamp 13 which connects the disks 1 and spacers 8 to the hub 7, a shaft 10 connected by the hub 7 by a shrink fit method, etc., a bearing 11 which supports the shaft 10 and housing 9 which supports the bearing 11. An assembling process is carried out so that the gap parts 28 formed by the hub 7, spacers 8 and disks 1 are deflected at positions opposite to each other by 180 deg. for each disk 1. In such a constitution, the revolving unbalance degree due to the disks and spacers and be greatly reduced. Thus a balancing job is omitted.

88. 发明专利

JPS6184414A Pre-load mechanism of spindle bearing 失效
标题翻译：主轴承预紧机构
公开(公告)号：JPS6184414A
公开(公告)日：1986-04-30
申请号：JP20531884
申请日：1984-09-29
申请人： Hitachi Ltd
发明人： SUZUKI MASAMI , NISHIDA HIROSHI , OTSUKA KOICHI , AZUMA MIKIO
IPC分类号： F16C25/08 , F16C35/077 , G11B19/20
CPC分类号： F16C25/08
摘要： PURPOSE:To design highly accurated revolution with preventing vibration and whirl of a spindle by providing a radial pre-load machinery in the outer rim part of a bearing housing and a stopper to hinder a revolution of the bearing housing in the opposite position to the pre-load machinery. CONSTITUTION:The inner ring of a lower side bearing 3a is fixed to a spindle axis 2, and the outer ring is stuck to a bearing housing 4. In this case, a part of an external form of a circle is biasedly ground by the bearing housing 4 to make a bending rate radius between two points 12, 13 smooth and small, and made to connect with a foundation base 1 at the points 12, 13. And one notch is formed on the outer rim part of the bearing housing 4, on which a radial pre-load machinery 10 is provided so that the power direction goes in the direction of tangent of a lower side bearing 3a. Also, the other notch is formed on the opposite side of the above machinery 10, on which a stopper 11 is provided to receive revolving power given to the bearing housing 4 by the above machinery 10 by tangent power.
摘要翻译：目的：为了设计高精度的旋转，通过在轴承箱的外缘部分提供一个径向的预加载机械，并阻止轴承壳体在与预先相反的位置的转动，从而防止主轴的振动和旋转装机械。构成：下侧轴承3a的内圈固定在主轴2上，外圈与轴承座4卡合。在这种情况下，外圈形状的一部分被轴承偏置地研磨壳体4使得两点12,13之间的弯曲速度半径平滑且小，并且在点12,13处与基座1连接。并且在轴承壳体4的外缘部分上形成一个凹口，在其上设置径向预加载机械10，使得动力方向沿下侧轴承3a的切线方向。此外，另一个凹口形成在上述机械10的相对侧上，在其上设置有止动件11，以通过切线力由上述机械10承受给予轴承壳体4的旋转动力。

89. 发明专利

JPS6180698A Magnetic disk device 失效
标题翻译：磁盘设备
公开(公告)号：JPS6180698A
公开(公告)日：1986-04-24
申请号：JP20167384
申请日：1984-09-28
申请人： Hitachi Ltd
发明人： NISHIDA HIROSHI , OKAZAKI YOSHITO , YAMANOGUCHI YOSHINOBU
IPC分类号： G11B33/14
摘要： PURPOSE: To prevent the inside of a device from dewing. to make the floating time of a magnetic head shorter and to make life longer by installing a solenoid type valve at the exhaust port of supply air, preserving said valve to the open condition immediately after the device is started and setting to the open condi tion with the elapse of prescribed time.
CONSTITUTION: Magnetic heads 6, which read and write information on a magnetic disk 1, are arranged on respective magnetic disks 1, and fixed with a gimbal 7 and a head arm 8 to a carriage 10. The carriage 10 can shift smoothly on the guide by a roller 9, and is shifted and positioned by a coil 11 and a magnetic circuit 12. A spindle 5, a carriage guide part and the magnetic circuit 12 are fixed to a base 13, and closed tightly with a cover 14. A hole 24 for supplying clean air and a hole 25 for exhaust are installed at a cover 14, and clean air filtered by an air filter 15 to a hole 24 for supply is supplied into the device by a blower 16.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：防止设备内部脱落。通过在供气的排气口安装电磁阀，使磁头的浮动时间更短，寿命更长，在设备启动后立即将阀门保持在打开状态，并设置为开启状态经过规定的时间。构成：在磁盘1上读写信息的磁头6被布置在相应的磁盘1上，并且用万向架7和头臂8固定在滑架10上。滑架10能够在导轨通过辊9移动并由线圈11和磁路12定位。主轴5，滑架引导部分和磁路12固定到基座13上，并用盖14紧密地闭合。孔 24用于供应清洁空气和用于排气的孔25安装在盖14上，并且由空气过滤器15过滤的净化空气到用于供应的孔24通过鼓风机16供应到装置中。

90. 发明专利

JPS6117262A Floppy disk driving device 失效
标题翻译：飞盘驱动装置
公开(公告)号：JPS6117262A
公开(公告)日：1986-01-25
申请号：JP12869885
申请日：1985-06-13
申请人： Hitachi Ltd
发明人： NISHIDA HIROSHI
IPC分类号： G11B17/041 , G11B17/02 , G11B17/04 , G11B19/04
摘要： PURPOSE: To prevent a damage accident of a recording medium by forming the titled device so that the door cannot be closed when a floppy disk is being inserted or drawn out, and a chucking mechanism interlocked with the opening and closing of this door cannot be operated either.
CONSTITUTION: In a state that a floppy disk has been inserted or drawn out halfway, a collar part 12' of a slider 11 and the lower end of the floppy disk 2 are engaged with each other, and the slider 11 is depressed downward by a certain distance. In this position, a stopper part 12 of the slider 11 exists in front of a stopper part 13 of a plate 4. Accordingly, even if the plate 4 is turned to the right in the figure, the stopper part 13 is engaged with the stopper part 12 of the slider 11 and its further turning is obstructed, a chuck mechanism cannot be operated, and a door 3 cannot be closed. In this way, it does not occur that the floppy disk 2 is pinched and pressed by a collet and a spindle 18 at an unintended position.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过形成标题装置来防止记录介质的损坏事故，以便在插入或拔出软盘时不能关闭门，并且不能操作与该门的打开和关闭互锁的夹紧机构或者。构成：在软盘被插入或拉出一半的状态下，滑块11的凸缘部12'和软盘2的下端彼此接合，并且滑块11向下按压一定距离在该位置，滑块11的止动部12存在于板4的止动部13的前方。因此，即使板4向右转动，止动部13与止动件滑块11的第12部分和其进一步的转动被阻塞，卡盘机构不能被操作，并且门3不能被关闭。以这种方式，不会发生软盘2由夹头和主轴18在非预期位置被夹持和按压。

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