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1. 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。

2. 发明专利

JPS6154080A Control circuit for positioning head of magnetic disc device 失效
标题翻译：用于定位磁盘设备头的控制电路
公开(公告)号：JPS6154080A
公开(公告)日：1986-03-18
申请号：JP17519084
申请日：1984-08-24
申请人： Hitachi Ltd
发明人： OKAZAKI YOSHITO , NAKABAYASHI KAZUYOSHI , OZAKI SHOJI
IPC分类号： G11B21/10 , G11B5/596
CPC分类号： G11B5/596
摘要： PURPOSE:To improve the precision of follow-up trucks for read and write actions preventing the vibration of a head by providing a switching method in a closed loop for a servo and controlling a loop gain automatically according to the action condition. CONSTITUTION:A position detector 5 detects the difference of the vibration between each truck signal in an output 4 of a servo head 3, and a position error detecting circuit 6 obtains the deviation of a head from the center of the truck on the basis of the amplitude difference and generates a control signal according to the value. This signal drives a voice coil motor 9 through a voice coil driving circuit 8 after operations such as a proportion, advance and delay are carried out by a compensation circuit 7, and a head 3 installed on an arm 10 is moved to the central position of each truck. On the compensation circuit 7, a switching means 11 is provided to increase the gain in the conpensation circuit 7 at the read and write action and to decrease it on the waiting according to signals from a control circuit 12.
摘要翻译：目的：提高跟踪卡车的读写动作精度，通过在伺服闭环中提供切换方式，根据动作条件自动控制回路增益，防止头部振动。构成：位置检测器5检测伺服头3的输出4中的每个卡车信号之间的振动的差异，位置误差检测电路6基于卡车的中心从车辆的中心获得偏离振幅差，并根据该值产生控制信号。该信号在通过补偿电路7执行比例，提前和延迟等操作之后通过音圈驱动电路8驱动音圈电动机9，并且安装在臂10上的头3移动到每辆卡车。在补偿电路7上，提供切换装置11，以在读写动作下增加补偿电路7中的增益，并根据来自控制电路12的信号在等待中减小。

3. 发明专利

JPS62222585A ELECTRIC SIGNAL DELIVERING STRUCTURE 失效
公开(公告)号：JPS62222585A
公开(公告)日：1987-09-30
申请号：JP6449086
申请日：1986-03-22
申请人： HITACHI LTD
发明人： NAKABAYASHI KAZUYOSHI , OKAZAKI YOSHITO
IPC分类号： G06F1/18 , G06F1/00 , G06F3/06 , H01R13/10

4. 发明专利

JPS59198574A Magnetic disc driving device 失效
标题翻译：磁盘驱动器件
公开(公告)号：JPS59198574A
公开(公告)日：1984-11-10
申请号：JP7286583
申请日：1983-04-27
申请人： Hitachi Ltd
发明人： OKAZAKI YOSHITO , OGAWA TAKUJI
IPC分类号： G11B21/12
CPC分类号： G11B21/12
摘要： PURPOSE:To attain carriage retract by utilizing a voltage generated from a DC motor caused by disc rotation inertia at the disc rotation stopping operation. CONSTITUTION:When the rotation of the disc is stopped, an input relay 3 is brought in the state as shown in broken lines and windings of a motor 4 generates respectively voltages V1, V2, V3 so as to act like a generator. The carriage retract is attained by smoothing the V1, V2, V3 generated from the motor 4 by a rectifier circuit 5 thereby forming a smoothed output voltage V and applying the voltage to both coil ends of a voice coil motor 6. Thus, no accessory such as spring or the like is required for the carriage, no effect is given to the head positioning control at normal operation. Further, the carriage retract operation is attained with a simple circuit not requiring a usual electric power supply.
摘要翻译：目的：通过利用由盘旋转停止操作中的盘旋转惯性引起的由直流电机产生的电压来实现滑架缩回。构成：当盘的旋转停止时，输入继电器3处于虚线所示的状态，电动机4的绕组分别产生电压V1，V2，V3，以发生发电机的作用。通过整流电路5平滑从电动机4产生的V1，V2，V3，从而形成平滑的输出电压V并将电压施加到音圈电动机6的两个线圈端来实现。因此，没有附件由于作为滑架需要弹簧等，所以在正常操作时不会对头部定位控制产生影响。此外，通过不需要通常的电力供应的简单电路来实现滑架缩回操作。

5. 发明专利

JPS5923655B2 失效
公开(公告)号：JPS5923655B2
公开(公告)日：1984-06-04
申请号：JP2411379
申请日：1979-02-28
申请人： HITACHI LTD
发明人： OKAZAKI YOSHITO , MATSUMURA NOBUHIRO
IPC分类号： G11B20/14 , H03K5/26 , H03L7/085 , H03L7/089 , H04L7/033

6. 发明专利

JPS55115738A PHASE SYNCHRONISM CIRCUIT 失效
公开(公告)号：JPS55115738A
公开(公告)日：1980-09-05
申请号：JP2411379
申请日：1979-02-28
申请人： HITACHI LTD
发明人： OKAZAKI YOSHITO , MATSUMURA NOBUHIRO
IPC分类号： G11B20/14 , H03K5/26 , H03L7/085 , H03L7/089 , H04L7/033
摘要： PURPOSE:To increase the phase margin, by flowing the current to the first direction with the first signal rising at the leading of the input signal and falling after a given time, and flowing the current to opposite direction with the second signal falling with the output of VCO. CONSTITUTION:The monostable multivibrator 4 outputs signal for a given time with the input signal IN, this output is given to the base of transistors TrQ3, Q4 via the gate N4 to supply the current of I0 direction to LPF2. The data latch circuit 5 is set with the input signal and reset with the output of VCO, and the output is fed to TrQ1, Q2 via the level shift circuit consisting of the gate N5 and TrQ5, Q6 to flow the current in the opposite direction to LPF2 as I0. Further, DC level in response to the phase difference between the input signal IN and VCO output from LPF2, can be obtained.

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