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1. 发明专利

JPH0310190B2 失效
公开(公告)号：JPH0310190B2
公开(公告)日：1991-02-13
申请号：JP3793684
申请日：1984-02-29
申请人： FUJITSU LTD
发明人： KOMATSUZAKI TOSHIAKI , MIHARA TAKAHISA , ITO KATSUHIKO , KUDO RYOSUKE , TOCHAMA KAZUNORI
IPC分类号： G11B21/22 , G11B5/48 , G11B5/54 , G11B21/12

2. 发明专利

JPS62208474A ACTUATOR ARM STOPPER STRUCTURE OF MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS62208474A
公开(公告)日：1987-09-12
申请号：JP4852086
申请日：1986-03-07
申请人： FUJITSU LTD
发明人： MIHARA TAKAHISA
IPC分类号： G11B21/02
摘要： PURPOSE:To constantly keep constantly the extent of the movement of a shaft and to facilitate the setting of a compressing force by executing the eccentricity through an elastic lining to a fitting hole and providing the clearance of the constant dimensions in one side of the rocking direction between the inner circumferential surface of the fitting hole and the outer circumferential surface of the shaft. CONSTITUTION:At the time of the compressing action of a magnetic head 12-1, a stopper shaft 20 constituting the stopper structure of an actuator arm 11 is pressed in the rocking direction by a receiving wall surface 19b, an elastic body lining 21 is bent and abutted (stopped) to the inner surface of a fitting hole 17a. Consequently, the shaft 20 can be always shifted only by constant dimensions delta correctly and without fail. Thus, the correct and secure compressing stroke of the necessary minimum limit of the magnetic head 12-1 corresponding to the shifting quantity delta of the shaft 20 can be always maintained and the compressing force can be correctly and easily set.

3. 发明专利

JPS62204479A ROCKING TYPE ACTUATOR STOPPER MECHANISM FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS62204479A
公开(公告)日：1987-09-09
申请号：JP4533586
申请日：1986-03-04
申请人： FUJITSU LTD
发明人： MIHARA TAKAHISA
IPC分类号： G11B21/02 , G11B21/12
摘要： PURPOSE:To prevent the generation of an irreversible relative position dislocation between arms, and to improve reliability for a device, by providing a stopper mechanism at the bobbin side of an actuator. CONSTITUTION:A stopper space part 18 piercing a coupling part between a laminated arm 12 and a bobbin 13 in parallel with an axis (alpha) is provided. On the end face of the bobbin 13 positioning within the space part 18, a catching member 19 having a pair of catching wall planes 19a and 19b which face oppositely with each other at interval of a prescribed distance along with a rocking direction, and the regulate angle of rocking, is arranged and fixed. A stopper haft 20 is arranged between the catching wall planes 19a and 19b of the catching member 19 in parallel with the rocking axis (alpha), and besides, both ends of the shaft are fixed at a device frame 22 side. In this way, an actuator 11 rocks and rotates in arrow heads E and F directions, and the angle of rocking of the shaft is regulated by catching and stopping of the wall planes 19a and 19b with the stopper shaft 20. In such a way, the stopper mechanism for a rocking type actuator 11 is provided at the bobbin 13 side.

4. 发明专利

JPS62140281A VIBRATION PREVENTING SYSTEM FOR ACTUATOR ARM 失效
公开(公告)号：JPS62140281A
公开(公告)日：1987-06-23
申请号：JP28031585
申请日：1985-12-13
申请人： FUJITSU LTD
发明人： MIHARA TAKAHISA
IPC分类号： H02P25/06 , G11B21/02 , G11B21/08 , G11B21/10 , H02P7/00
摘要： PURPOSE:To reduce vibration of an actuator and to improve its acceleration performance by inserting an inductor in series with a voice coil motor and controlling rising characteristics of a supply current to the motor. CONSTITUTION:When a driving signal for the voice coil motor 10 is supplied to a terminal F, an operational amplifier 5 and a transistor TR6 operate to turn on a TR7 and turn off a TR8. At this time, a current from a power source V flows through the TR7, the inductance 9, the motor 10, and a TR12. Then when an operational amplifier 14 operates, TRs 13 and 11 turn on and the TR12 turns off. At this time, the current from the power source V flows through the TR11, motor 10, inductance 9, and TR8. Consequently, the acceleration of the actuator arm in a direction A-B increases and vibration in a direction C-D decreases.

5. 发明专利

JPS60197984A LOCK MECHANISM 失效
公开(公告)号：JPS60197984A
公开(公告)日：1985-10-07
申请号：JP3793684
申请日：1984-02-29
申请人： FUJITSU LTD
发明人： KOMATSUZAKI TOSHIAKI , MIHARA TAKAHISA , ITOU KATSUHIKO , KUDOU RIYOUSUKE , TOCHIYAMA KAZUNORI
IPC分类号： G11B21/22 , G11B5/48 , G11B5/54 , G11B21/12
摘要： PURPOSE:To simplify a structure by engaging a lock member and a lock arm in a state that the moving directions cross each other vertically. CONSTITUTION:When a magnetic head 8 oscillates a position of points 8a-8b in the direction as indicated with an arrow A, a lock pin 31 oscillates between points 31a-31b. When the pin 31 is positioned at the point 31b, for instance, the head 8 is on a CSS zone. In this case, when a rotational center 30c of a lock arm 30 is placed on a tangential line in the point 31b on a moving locus of the pin 31, the rotating direction of the arm and the rotating direction of the pin criss each other vertically. Accordingly, in a state that the pin 31 is engaged to an engaging part 30', it is unnecessary to ad a detaining force to the lock arm. In this case, the arm 30 is energized in the direction as indicated with an arrow C by a spring 32 in order that the arm 30 is not separated from the pin 31 by a large vibration, and accordingly, a large tension is not required.

6. 发明专利

JPS596784A Control system for dc motor 失效
标题翻译：直流电机控制系统
公开(公告)号：JPS596784A
公开(公告)日：1984-01-13
申请号：JP11343282
申请日：1982-06-30
申请人： Fujitsu Ltd
发明人： EMORI TERUAKI , MIHARA TAKAHISA
IPC分类号： H02P6/06 , H02P5/00
CPC分类号： H02P5/00
摘要： PURPOSE:To moderate the power consumption of a transistor at the starting time by providing means for clamping a drive current, gradually increasing the clamping level at the accelerating time by a time constant circuit, and gradually decreasing at the decelerating time. CONSTITUTION:The speed of a spindle motor or the like M of a magnetic disc device is detected by a Hall element 1, inputted to a converter 3, thereby selectively controlling a transistor 5 of a drive circuit 4. On the other hand, the speed signal and the clock of a reference oscillator 8 are inputted to an ON/OFF generator 9, thereby turning ON or OFF a time constant circuit having resistors R1, R2, and a condenser C1, the output is inputted together with the detected current value to a comparator 7, thereby generating a reference voltage for clamping the drive current. Accordingly, since the current gradually rises at the starting time, the power consumed by the transistor 5 can be alleviated, and the current can be averaged at the normally rotating time, thereby reducing the variation in the rotation.
摘要翻译：目的：通过提供夹持驱动电流的装置来缓解晶体管在启动时的功耗，在加速时间逐渐增加时间常数电路的钳位电平，并在减速时逐渐减小。构成：通过霍尔元件1检测磁盘装置的主轴电动机等的速度，输入到转换器3，由此选择性地控制驱动电路4的晶体管5.另一方面，速度信号和参考振荡器8的时钟被输入到ON / OFF发生器9，从而导通或关断具有电阻器R1，R2和电容器C1的时间常数电路，输出与检测到的电流值一起输入到比较器7，从而产生用于钳位驱动电流的参考电压。因此，由于电流在开始时间逐渐上升，因此可以减轻晶体管5消耗的功率，并且可以在正常旋转时间平均电流，从而减小旋转的变化。

7. 发明专利

JPS62217474A MAGNETIC HEAD FIXING MECHANISM 失效
公开(公告)号：JPS62217474A
公开(公告)日：1987-09-24
申请号：JP5973286
申请日：1986-03-18
申请人： FUJITSU LTD
发明人： YOSHIDA MITSUAKI , MIHARA TAKAHISA
IPC分类号： G11B21/22 , G11B21/02 , G11B21/12
摘要： PURPOSE:To reduce the size, power consumption, etc., of a magnetic disk device by providing a permanent magnet which produces a magnetic field perpendicular to a specific plane with a coil which moves relatively on the plane, and utilizing the synergism with the magnetic field produced by the permanent magnet. CONSTITUTION:When the coil 6 is excited, a restricting member 1' is restrained with the force of a spring 3 from moving toward the outer periphery of the structure 9 of a magnetic head along with a mold member 7. In this state, when an exciting current for producing a magnetic field in the same direction with the magnetic field obtained by the 1st permanent magnet 5' is supplied to the coil 6, the coil 6 is repelled by the permanent magnet 5' and attracted by a permanent magnet 5''. Consequently, the restricting member 1' rotates counterclockwise together with the mold member 7 and the step of the restricting member 1' comes out of the structure 9 of the magnetic head to release the restrained state. Consequently, the restricting member 1' is driven with the extremely small exciting current to release the head from being restrained, and the size is reducible.

8. 发明专利

JPS62173671A INDEX SIGNAL PREPARING SYSTEM 失效
公开(公告)号：JPS62173671A
公开(公告)日：1987-07-30
申请号：JP1496986
申请日：1986-01-27
申请人： FUJITSU LTD
发明人： SAITO SHIGEO , MIHARA TAKAHISA
IPC分类号： G11B19/20 , G11B19/02 , G11B19/28
摘要： PURPOSE:To facilitate miniaturization by selecting one of three signals sent out by a Hall element by output of a sensor. CONSTITUTION:Outputs of a Hall element 1 and a photosensor 2 are supplied to an AND circuit 3. The photosensor 2 sends a signal that becomes on once at one rotation of a spindle motor. The AND circuit 3 selects a signal sent out by the Hall element 1 by output of the photosensor 2 and makes it an index signal. Thereby, a space is not necessary to mount a sensor for preparing the index signal in the magnetic disk device side, and the system can be miniaturized.

9. 发明专利

JPS62132272A ACTUATOR STRUCTURE 失效
公开(公告)号：JPS62132272A
公开(公告)日：1987-06-15
申请号：JP27228285
申请日：1985-12-03
申请人： FUJITSU LTD
发明人： MIHARA TAKAHISA
IPC分类号： G11B21/02 , H02K33/18
摘要： PURPOSE:To suppress a temperature stress, to maintain the rigidity and to prevent an off-track/vibration by fixing a block for holding to a frame after fixing on the block for holding of the material equal to the frame in the core central surface of a magnetic circuit. CONSTITUTION:When an E-type magnetic circuit used for the swaying type actuator of a magnetic disk is fixed to the frame, an aluminium frame 17 is a housing formed to a U-shape and a movable part is directly fitted. At such a time, for a magnetic circuit 18, a linking point 21 is provided at the rear surface of a yoke 20 on the central surface of a magnetic circuit center pole 19, an aluminium block 22 for holding is arranged, the magnetic circuit 18 is fixed to the block 22 by a screw, 27 and thereafter, the magnetic circuit is inserted from a magnetic circuit inserting port 23 provided beforehand at the frame side surface and the outer circumferential part of the block 22 is fixed to the frame 17 by a screw 24. For the block 22 for the holding, the material having the approximately same thermal expansion coefficient as the frame 17 is used. Thus, the off-track due to the temperature of the actuator can be prevented.

10. 发明专利

JPS6157078A Actuator structure 失效
标题翻译：执行机构结构
公开(公告)号：JPS6157078A
公开(公告)日：1986-03-22
申请号：JP17861184
申请日：1984-08-28
申请人： Fujitsu Ltd
发明人： MIHARA TAKAHISA
IPC分类号： G11B21/02 , G11B5/54
CPC分类号： G11B5/54
摘要： PURPOSE:To avoid a deformation due to temperature stress by fixing one end of the joint of the housing of a carriage holding part and a magnetic circuit for swinging an oscillating shaft and bringing the other end contact through a roll. CONSTITUTION:A housing 13 fixes an arm 2 having a magnetic head 1 disposed opposite to a circular plate 11 to an oscillating shaft 12, and a magnetic circuit 14 swings said shaft 12. One end of a joint between the shaft 12 and circuit 14 is fixed, while the other end is fixed with a screw 17 and a keep plate 16 through a roll 15. The change in the vertical direction of the housing, which is caused by the difference between materials of the housing 13 and the magnetic circuit 14 and that between coefficients of linear expansion, arises along the roll 15, whereby the temperature stress will not occur in the housing 13 by less friction. Moreover, the bottom of the housing 13 holds the fixed contact surface of the magnetic circuit 14, while the top comes contact with the magnetic circuit 14 in the longitudinal direction of the roll 15, and both the housing 13 and said circuit 14 are formed in one body; therefore the titled actuator has the rigidity and its resonance frequency drops hardly. Thus the structure that the temperature stress will not occur at the joint of both of them can be obtained.
摘要翻译：目的：为了避免由于温度应力引起的变形，通过固定滑架保持部分的壳体的接头的一端和用于摆动摆动轴的磁路，并使另一端接触通过辊。构成：壳体13将具有与圆板11相对设置的磁头1的臂2固定到摆动轴12，并且磁路14摆动所述轴12.轴12和电路14之间的接头的一端是固定，而另一端用螺钉17和保持板16通过辊15固定。由壳体13和磁路14的材料之间的差异引起的壳体垂直方向的变化和沿着辊15产生线性膨胀系数，由此通过较小的摩擦在壳体13中不会发生温度应力。此外，壳体13的底部保持磁路14的固定接触表面，同时顶部沿着辊15的纵向方向与磁路14接触，壳体13和电路14形成在一体因此，标称的致动器具有刚度并且其谐振频率几乎不下降。因此，可以获得在两者的接头处不会发生温度应力的结构。

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