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1. 发明授权

US4644157A Optical rotation detecting apparatus 失效
标题翻译：光旋转检测装置
公开(公告)号：US4644157A
公开(公告)日：1987-02-17
申请号：US471708
申请日：1983-03-03
申请人： Kuniichi Ozawa , Yasuhiro Goto , Hiromi Nakase , Shinya Yukino
发明人： Kuniichi Ozawa , Yasuhiro Goto , Hiromi Nakase , Shinya Yukino
IPC分类号： G01D5/245 , G01P3/486 , G01P13/04 , G01D5/34
CPC分类号： G01P3/486 , G01D5/2451 , G01P13/045
摘要： An optical rotation detecting apparatus for a bushless dc motor detects rotation information of the shaft by the slits arranged at equal pitches along the circumference of a rotary disk and a photoelectric conversion element arranged circumferentially at a pitch which is an integral multiple of the slit pitch and including a first set of photoelectric conversion element pieces arranged alternately with the former thereby generating a first rotation information signal having a frequency proportional to the rotational speed of the shaft and a second rotation information signal having a 90-degree phase difference with the first rotation information signal. The phases of the first and second rotation information signals are compared to detect the direction of rotation of the shaft. The accuracy of rotation information can be further improved by increasing the number of photoelectric conversion element pieces per slit pitch. The photoelectric conversion element includes an amorphous silicon photoelectric conversion element.
摘要翻译：用于无衬套直流电动机的光学旋转检测装置通过沿旋转盘的圆周等间距布置的狭缝和以每个狭缝间距的整数倍的间距周向布置的光电转换元件来检测轴的旋转信息，以及包括与前者交替布置的第一组光电转换元件片，从而产生具有与轴的转速成比例的频率的第一旋转信息信号和与第一旋转信息成90度相位差的第二旋转信息信号信号。比较第一和第二旋转信息信号的相位以检测轴的旋转方向。通过增加每个狭缝间距的光电转换元件的数量，可以进一步提高旋转信息的精度。光电转换元件包括非晶硅光电转换元件。

2. 发明授权

US6016238A Spindle motor for driving disk 失效
标题翻译：用于驱动盘的主轴电机
公开(公告)号：US6016238A
公开(公告)日：2000-01-18
申请号：US531074
申请日：1995-09-20
申请人： Shouichi Yoshikawa , Shinya Yukino , Masahiro Naba
发明人： Shouichi Yoshikawa , Shinya Yukino , Masahiro Naba
IPC分类号： G11B19/20 , H02K7/14 , G11B17/02
CPC分类号： G11B19/2009 , H02K7/14
摘要： A magneto-optic disk-driving spindle motor has a rotary shaft for driving a spindle hub. Bearings support the rotary shaft for free rotation. A stator core is fixed relative to the bearings, and a driving magnet is fixed relative to the spindle hub. The spindle hub is provided with an upper side having a magneto-optic disk loading face for receiving and supporting a magneto-optic disk, and an axial part that is to be fitted into the center hole of the magneto-optic disk. A lower side of the spindle hub has a connection for connecting the axial upper end of the rotary shaft to the lower shaft of the spindle hub so as to fix the spindle hub to the rotary shaft. By having the axial part on the spindle hub as opposed to the end of the rotary shaft, the rotary shaft can have a diameter other than the diameter required for engagement with the center hole of the magneto-optic disk.
摘要翻译：磁光盘驱动主轴电机具有用于驱动主轴毂的旋转轴。轴承支持旋转轴自由旋转。定子铁心相对于轴承固定，驱动磁体相对于主轴毂固定。主轴毂设置有具有用于接收和支撑磁光盘的磁光盘装载面的上侧和将被装配到磁光盘的中心孔中的轴向部分。主轴毂的下侧具有用于将旋转轴的轴向上端与主轴毂的下轴连接的连接，从而将主轴毂固定在旋转轴上。通过使主轴毂上的轴向部分与旋转轴的端部相对，旋转轴可以具有除了与磁光盘的中心孔接合所需的直径以外的直径。

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