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6 条记录 (耗时 0.024 秒)

    Rotation drive apparatus
    3.
    发明授权
    Rotation drive apparatus 失效
    旋转驱动装置

    公开(公告)号：US6005749A

    公开(公告)日：1999-12-21

    申请号：US35845

    申请日：1998-03-06

    申请人： Hiroshi Ikuta ,  Fumiharu Sudo ,  Toru Nakahara ,  Mitsuhiro Ueno ,  Yuji Shishido

    发明人： Hiroshi Ikuta ,  Fumiharu Sudo ,  Toru Nakahara ,  Mitsuhiro Ueno ,  Yuji Shishido

    IPC分类号： F16F15/36 ,  G01M1/36 ,  G11B25/04 ,  G11B33/08 ,  H02K15/16 ,  G11B17/02 ,  H02K5/24

    CPC分类号： G01M1/36 ,  F16F15/363 ,  G11B25/043 ,  G11B33/08 ,  H02K15/165

    摘要： A magnet is provided which holds spherical balancers in the central portion of a rotor when the rotation of the rotor is stopped. When rotations of the rotor is started, a larger torque T.sub.0 is transmitted from the rotor to the balancers. Thus, the balancers quickly start rotating. When the rotor rotates at high speed, the centrifugal force separates the balancers from the magnet and moves the same to the outer wall portion of the rotor. At this time, a torque T.sub.0 which is transmitted from the rotor to the balancer is reduced so that the balancers are moved in the circumferential direction. Thus, the automatic aligning operation is performed. The number (n) of the balancers is made to be a value obtained by the following equation:n=180/.theta.+0.5 (all digits to the right of the decimal point are discarded)wherein .theta.: angle of balancer balls disposed in the outer portion, in which .theta.=2sin.sup.-1 {r/(R-r)}R: radius of movable spacer: radius of each balancer ball

    摘要翻译： 提供一种磁体，当转子的旋转停止时，磁体在转子的中心部分保持球形平衡器。 当转子的转动开始时，转矩越大，转矩越大，平衡器转速越大。 因此，平衡机迅速开始旋转。 当转子高速旋转时，离心力将平衡器与磁体分开并将其移动到转子的外壁部分。 此时，从转子传递到平衡器的转矩T0减小，使得平衡器沿圆周方向移动。 因此，执行自动对准操作。 平衡器的数量（n）为通过以下等式获得的值：n = 180 /θ+0.5（舍弃小数点右侧的所有数字）其中theta：平衡器球的角度位于 外部，其中θ= 2sin-1 {r /（Rr）} R：可移动空间的半径r：每个平衡球的半径

    Magnetic head and rotary head drum device
    4.
    发明授权
    Magnetic head and rotary head drum device 失效
    磁头和旋转磁头鼓装置

    公开(公告)号：US06954334B2

    公开(公告)日：2005-10-11

    申请号：US10376586

    申请日：2003-03-03

    申请人： Toshiaki Wakita ,  Hisato Hirasaka ,  Fumiharu Sudo

    发明人： Toshiaki Wakita ,  Hisato Hirasaka ,  Fumiharu Sudo

    IPC分类号： G11B5/11 ,  G11B5/52 ,  G11B5/53 ,  G11B5/10

    CPC分类号： G11B5/52 ,  G11B5/11

    摘要： A magnetic head mounted on a rotary head drum device comprises a head chip, and a magnetic shield disposed to surround all or a part of the surfaces other than a front surface of the head chip. The magnetic shield comprises a magnetic flux absorber made of ferrite and an electromagnetic wave shield made of copper. This enables a reduction of the amount of unnecessary magnetic fluxes and electromagnetic waves jumping away from the recording head to the reproducing head. Simultaneously, the magnetic flux absorber absorbs the magnetic flux coming from outside to the reproducing head before the magnetic flux reaches the head chip and the electromagnetic wave shield shields a high frequency electromagnetic wave which was not absorbed by the magnetic flux absorber 80 that it is possible to reduce the amount of the magnetic flux or the like jumping into the reproducing head and to improve the S/N of the reproduced signal.

    摘要翻译： 安装在旋转磁头鼓装置上的磁头包括头部芯片和设置成围绕除了头部芯片的前表面之外的所有或部分表面的磁屏蔽。 磁屏蔽包括由铁氧体制成的磁通量吸收器和由铜制成的电磁波屏蔽。 这使得能够减少从记录头跳到再现头的不必要的磁通量和电磁波的量。 同时，磁通吸收器在磁通量到达磁头芯片之前吸收从外部到再现磁头的磁通量，并且电磁波屏蔽屏蔽不被磁通量吸收器80吸收的高频电磁波，可能 以减少跳入再现头的磁通量等并改善再现信号的S / N。

    Disk rotating mechanism
    5.
    发明授权
    Disk rotating mechanism 有权
    盘旋转机构

    公开(公告)号：US06252319B1

    公开(公告)日：2001-06-26

    申请号：US09340386

    申请日：1999-06-28

    申请人： Fumiharu Sudo ,  Yuji Shishido ,  Takashi Mochida ,  Shigeo Kobayashi ,  Kentaro Soeda ,  Hiroshi Ikuta ,  Mitsuhiro Ueno

    发明人： Fumiharu Sudo ,  Yuji Shishido ,  Takashi Mochida ,  Shigeo Kobayashi ,  Kentaro Soeda ,  Hiroshi Ikuta ,  Mitsuhiro Ueno

    IPC分类号： H02K524

    CPC分类号： G11B17/0282 ,  H02K7/04

    摘要： Disclosed is a disk rotating mechanism equipped with an automatic aligning mechanism in which the number of parts is reduced and in which an improvement in assembly operability and a reduction in cost are achieved. The automatic aligning mechanism includes a case body made of a non-magnetic material and formed as a flat cylinder with one end surface closed, two or more balance members provided so as to be freely movable in the inner space (movement space) of the case body, and an attracting magnet adapted to attract the balance members when the rotating mechanism is at rest or rotating at low speed, wherein the case body is supported by the spindle shaft of a spindle motor and wherein the closed end surface (table portion) thereof serves as the table portion of a turntable.

    摘要翻译： 公开了一种具有自动对准机构的盘旋转机构，其中部件数量减少，并且其中实现了组装操作性的提高和成本的降低。 自动对准机构包括由非磁性材料制成的壳体，并形成为一个端面关闭的扁平圆筒，两个或更多个平衡构件设置成能够在壳体的内部空间（移动空间）中自由移动 主体和适于在所述旋转机构静止或低速旋转时吸引所述平衡构件的吸引磁体，其中，所述壳体由主轴电机的主轴支撑，并且其中所述闭合端面（台部） 用作转盘的台面部分。

    Rotation control apparatus
    6.
    发明授权
    Rotation control apparatus 失效
    旋转控制装置

    公开(公告)号：US6155134A

    公开(公告)日：2000-12-05

    申请号：US998826

    申请日：1997-12-29

    申请人： Hiroshi Ikuta ,  Mitsuhiro Ueno ,  Fumiharu Sudo ,  Toru Nakahara

    发明人： Hiroshi Ikuta ,  Mitsuhiro Ueno ,  Fumiharu Sudo ,  Toru Nakahara

    IPC分类号： H02K1/22 ,  F16F15/36 ,  H02K5/24 ,  H02K7/04 ,  F16F15/22

    CPC分类号： F16F15/363 ,  Y10T74/2111

    摘要： A rotation control device capable of suppressing vibrations of a rotation unit produced due to changes in weight unbalances of the rotation unit. On a disc rotation control device 2, made up of a driving shaft 8 rotated along with an optical disc 90, a turntable 9, a motor rotor 10 and a magnet 15 mounted on the motor rotor 10, balancer members 6, 7 are mounted so that the balancer members 6, 7 are rotatably supported on the driving shaft 8. The disc rotation control device 2 causes rotation of the rotation unit such that a synthesized center of gravity of the rotation unit offset from the center of rotation by the unbalances of the optical disc 90 and the balancer members 6, 7 will coincide with the center of rotation.

    摘要翻译： 一种旋转控制装置，其能够抑制由于旋转单元的重量不平衡的变化而产生的旋转单元的振动。 在由与光盘90一起旋转的驱动轴8，转盘9，电动机转子10和安装在电动机转子10上的磁铁15构成的盘旋转控制装置2上，平衡元件6,7被安装成 平衡器构件6,7可旋转地支撑在驱动轴8上。盘旋转控制装置2使得旋转单元的旋转使得旋转单元的合成重心由于旋转单元的重心偏离了旋转中心的不平衡 光盘90和平衡器构件6,7将与旋转中心重合。