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公开(公告)号：US4590529A
公开(公告)日：1986-05-20
申请号：US587272
申请日：1984-03-07
CPC分类号： G11B5/5521
摘要： A carriage device used for moving and positioning a magnetic head opposite prescribed tracks of a magnetic disk has the magnetic head mounted on a carriage which has linear motor mechanisms built integrally therein. The linear motor mechanisms incorporate coils secured to part of the carriage and permanent magnets secured aorund the coils. Guide rails serving to support the carriage within the range of the sliding motion of the coils are made of a magnetic substance.
摘要翻译： 用于移动和定位与磁盘的规定轨道相对的磁头的托架装置具有安装在其上整体形成有线性马达机构的托架上的磁头。 线性马达机构包括固定到托架的一部分的线圈和固定在线圈上的永磁体。 用于在线圈的滑动运动的范围内支撑托架的导轨由磁性物质制成。
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公开(公告)号：US4558244A
公开(公告)日：1985-12-10
申请号：US588534
申请日：1984-03-12
CPC分类号： H02K37/18
摘要： The present invention provides a micro stepping motor for more accurately stepping and positioning a magnetic head in a magnetic disc system. The stepping motor has a permanent magnet type rotor and a stator encircling the rotor, the rotor having a plurality of pole teeth formed therein with a fine pitch and the stator also having a plurality of pole teeth formed therein with a fine pitch and disposed opposed to the pole teeth in the rotor, the stator pole teeth being divided into at least one pair of pole tooth groups which are out of phase relative to each other by an electrical angle of 180 degrees. A single common stator coil is provided to the pair of stator pole tooth groups. Thus, the stepping pitch of the rotor is determined by the pitch in the pole tooth groups, whereby the rotor can steppingly be driven with higher density even by the reduced number of stator coils. In addition, plural pairs of pole tooth groups can be formed such that at least two pairs of pole tooth groups and the corresponding two stator coils will be provided to determine the stepping angle of the rotor optionally under the multi-excitation.
摘要翻译： 本发明提供一种微步进电机，用于在磁盘系统中更精确地将磁头步进和定位。 步进电机具有永久磁铁式转子和环绕转子的定子，该转子具有形成在其中的细小间距的多个极齿，并且该定子还具有形成有细间距的多个极齿，并与 转子中的极齿，定子极齿被分成至少一对极齿组，它们彼此相位相差180度的电角度。 单个公共定子线圈被提供给一对定子极齿组。 因此，转子的步进间距由极齿组中的间距决定，即使通过减少定子线圈的数量，转子也可以以更高的密度逐步驱动。 此外，可以形成多对极齿组，使得将提供至少两对极齿组和相应的两个定子线圈，以确定任选地在多次激励下的转子的步进角。
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公开(公告)号：US4144467A
公开(公告)日：1979-03-13
申请号：US600904
申请日：1975-07-31
申请人： Fumio Nakajima , Akira Nikaido , Mitsuo Onda , Takayasu Machida , Takashi Toida
发明人： Fumio Nakajima , Akira Nikaido , Mitsuo Onda , Takayasu Machida , Takashi Toida
摘要： A pulse motor for clockworks and the like in which the rotor comprises two spaced-apart permanent magnetic disks mounted upon a common shaft and rotatable with respect to a stator. The stator comprises a respective pair of magnetic poles in the plane of each disk, the poles of the pair being interconnected by a shank and a coil wound upon the respective shanks, the coils lying on opposite sides of the rotor. The coils can be excited independently to cause the respective pair of poles to magnetically cooperate with the respective disk and rotate the motor in the forward or the reverse sense.
摘要翻译： 用于钟表工业等的脉冲电机，其中转子包括安装在公共轴上并相对于定子可旋转的两个间隔开的永久磁盘。 定子包括在每个盘的平面中的相应的一对磁极，该对的磁极通过柄和缠绕在相应的柄上的线圈相互连接，线圈位于转子的相对侧上。 线圈可以被独立地激励，以使相应的一对磁极与相应的磁盘磁配合，并以正向或反向方向旋转电动机。
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公开(公告)号：US3958167A
公开(公告)日：1976-05-18
申请号：US420698
申请日：1973-11-30
申请人： Fumio Nakajima , Akira Nikaido , Mitsuo Onda , Takayasu Machida , Takashi Toida
发明人： Fumio Nakajima , Akira Nikaido , Mitsuo Onda , Takayasu Machida , Takashi Toida
摘要： A reversible pulse-motor driving circuit comprising a steady driving circuit composed of an oscillator circuit, a frequency divider circuit, a waveform conversion circuit, and a driving circuit, and a fast correction driving-circuit composed of a fast correction set-circuit, a first gate circuit, a detector circuit, a normal and reverse discrimination circuit, a conversion change-over circuit, a pulse selector circuit, a first memory circuit, a second gate circuit and a second memory circuit, whereby a user can hear a time signal delivered from a calculation circuit and only push a pushbutton to rotate the pulse motor in a reverse direction when the second hand is ahead of the correct time, and rotate the pulse motor in a forward direction when the second hand is lagging with respect to the correct time, and the use of a frequency higher than the steady driving frequency permits a fast setting of the second, minute or hour hand to the correct time. A reversible pulse motor for use in timepiece and more particularly in wrist watch is disclosed which can be rotated in forward and reverse directions by the driving circuit, which is small in size and which can operate with a minimal consumption of the electtric power.
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公开(公告)号：US4283783A
公开(公告)日：1981-08-11
申请号：US96450
申请日：1979-11-21
申请人： Fumio Nakajima , Takayasu Machida , Kenji Yamada , Fumio Kanno
发明人： Fumio Nakajima , Takayasu Machida , Kenji Yamada , Fumio Kanno
CPC分类号： G04C3/143
摘要： In an electronic timepiece having a stepping motor which drives time indicating means, a system is provided for detecting an increase in the load torque on the stepping motor above a predetermined level. When such an increase is detected, the conditions for detection of the load on the stepping motor are changed, and thereafter drive pulses of increased power are applied to the stepping motor. When the increased load is removed, this is detected under the new set of detection conditions, and a return to the original detection conditions is executed, with the drive pulse power being returned to the original level. Stability of control is thereby provided, together with immediate response to increased load on the stepping motor.
摘要翻译： 在具有驱动时间指示装置的步进电机的电子钟表中，设置有用于检测步进电机上的负载转矩增加到高于预定水平的系统。 当检测到这种增加时，用于检测步进电机上的负载的条件改变，此后增加功率的驱动脉冲被施加到步进电机。 当增加的负载被去除时，这在新的检测条件下被检测到，并且执行返回到原始检测条件，驱动脉冲功率被恢复到原始电平。 从而提供稳定的控制，同时立即响应步进电机上的增加的负载。
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公开(公告)号：US4158287A
公开(公告)日：1979-06-19
申请号：US821433
申请日：1977-08-03
申请人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
发明人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
摘要： An electro-mechanical transducer driver circuit for an electronic timepiece characterized in that the pulse width of a driving pulse which drives an electro-mechanical transducer is controlled in a step-wise manner by the induced voltage of a driving coil.
摘要翻译： 一种用于电子钟表的机电换能器驱动电路，其特征在于，通过驱动线圈的感应电压以逐步的方式控制驱动机电换能器的驱动脉冲的脉冲宽度。
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公开(公告)号：US4048548A
公开(公告)日：1977-09-13
申请号：US644262
申请日：1975-12-24
申请人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
发明人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
摘要： A stepping motor for use in an electronic timepiece which has a permanent magnet rotor and a stator provided with a driving coil. The stator is comprised of stator pole pieces each having assymetric portions which provide primary and secondary magnetic paths, respectively, whereby two static equilibrium positions are provided. The rotor may be stable at either one of these static equilibrium positions by controlling the supply of two-phase pulses to the driving coil so that the rotor may be rotated in normal or reverse direction. SuThis invention relates in general to stepping motors and, more particularly, to a reversible stepping motor for use in an electronic timepiece.As is well known, stepping motors, also called pulse motors, are becoming increasing employed in industrial applications due to the introduction of digital pulse techniques. Typical one of these applications involves electronic timepieces having electro-mechanical timekeeping movements which are driven by the stepping motors. Such motors are unidirectional and typically 180.degree. per input pulse. The stepping motor is usually comprised of a rotor and a stator provided with a driving coil. The stator has two pole pieces which are displaced or offset from each other with respect to a central axis between the pole pieces. With this arrangement, it is difficult to assemble the stator pole pieces so as to provide a stable operation of the rotor. In another expedient, the stator pole pieces are integrally formed with one another and shaped by stamping. This requires the provision of a complicated die for the specific stator pole pieces. In addition, the stepping motor of this type can not be driven in the reverse direction due to its inherent construction.It has heretofore been proposed to provide various types of reversible stepping motors for use in the electronic timepieces. Each of these stepping motors is usually comprised of more than three stator pole pieces and two driving coils which provide a larger construction, and is not suited for the electronic timepieces in which a minimum spacing for the stepping motor is required. Since, further, the stepping motor of this type is driven by four-phase pulses, a driver circuit is necessarily complicated in construction.It is, therefore, an object of the present invention to provide an improved stepping motor which overcomes the shortcomings encountered in the prior art.It is another object of the present invention to provide an improved stepping motor which is specifically suited for use in an electronic timepiece.It is another object of the present invention to provide an improved stepping motor which is simple in construction and easy to assemble.It is still another object of the present invention to provide an improved stepping motor which can be driven in a normal or reverse direction.It is still another object of the present invention to provide an improved stepping motor which has a single driving coil by which a rotor is rotated in a normal or reverse direction in a simple manner.It is a further object of the present invention to provide an improved stepping motor which has a single driving coil and a driver circuit arranged to apply two-phase pulses to the driving coil so as to rotate a rotor in a normal or reverse direction.It is a further object of the present invention to provide an improved stepping motor which has a single driver circuit comprised of a control switch means to control the supply of two-phase pulses to a driving coil.
摘要翻译： 一种用于电子钟表的步进电机，其具有永磁转子和具有驱动线圈的定子。 定子由定子极片组成，每个定子极片分别具有提供初级和次级磁路的不对称部分，由此提供两个静态平衡位置。 转子可以在这些静态中的任何一个处稳定
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公开(公告)号：US4129981A
公开(公告)日：1978-12-19
申请号：US764790
申请日：1977-02-02
申请人： Yasushi Nomura , Fumio Nakajima , Kenji Yamada , Takayasu Machida
发明人： Yasushi Nomura , Fumio Nakajima , Kenji Yamada , Takayasu Machida
摘要： An electronic timepiece having a reversible stepping motor to actuate time-indicating hands to provide a time display, which comprises a driver circuit to produce driving current pulses composed of compound pulses appearing each time unit. A rotor of the stepping motor rotates a plurality of steps during each time unit to cause one of the time-indicating hands to advance through unequal intervals to provide a modulated display.
摘要翻译： 一种具有可逆步进电动机的电子钟表，用于致动指示指针以提供时间显示，其包括用于产生由每个时间单位出现的复合脉冲组成的驱动电流脉冲的驱动电路。 步进电机的转子在每个时间单位期间旋转多个步骤，以使指示指针之一通过不相等的间隔前进，以提供调制显示。
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公开(公告)号：US4066947A
公开(公告)日：1978-01-03
申请号：US647282
申请日：1976-01-07
申请人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
发明人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
摘要： A stepping motor for use in an electronic timepiece in which a rotor is stable on an axis of static equilibrium at an angle from 0.degree. to 30.degree. with respect to a center line of the air gaps between stator pole pieces. The relationship between the stator pole pieces and the rotor is such that the phase difference between driving torque and attraction force applied to the rotor ranges from 60.degree. to 90.degree. by an electrical angle in a normal rotation of the rotor and ranges from 90.degree. to 120.degree. in a reverse rotation of the rotor.
摘要翻译： 一种用于电子钟表的步进电机，其中转子相对于定子极片之间的气隙的中心线在0°至30°的静止平衡轴上是稳定的。 定子极片和转子之间的关系使得驱动转矩和施加到转子的吸引力之间的相位差在转子正转时的电角度为60°至90°，范围为90°至 转子反转120°。
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公开(公告)号：US4150536A
公开(公告)日：1979-04-24
申请号：US760890
申请日：1977-01-21
摘要： An electronic timepiece includes a reversible stepping motor to drive rotatable hands to provide a time display. In a first preferred embodiment, the electronic timepiece includes a circuit means to generate alternating current pulses having an increased pulse width or an increased amplitude to drive the stepping motor with an increased driving current during high speed time correction when a manually operable external control member is actuated during time correction. In a second preferred embodiment, the electronic timepiece comprises a clockwise correction switch, a counter-clockwise correction switch and circuit means for generating first and second alternating current pulses of first and second pulse widths at a predetermined frequency higher than normal driving pulses to drive a stepping motor in clockwise and counter-clockwise directions, respectively, to perform clockwise and counter-clockwise corrections when the clockwise and counter-clockwise correction switches are actuated during time corrections, respectively. The pulse width of the second alternating current pulses is selected to be smaller than that of the normal driving pulses.
摘要翻译： 电子钟表包括可逆步进马达来驱动可旋转的手以提供时间显示。 在第一优选实施例中，电子钟表包括电路装置，用于产生具有增加的脉冲宽度或增加幅度的交流脉冲，以在高速时间校正期间以高速时间校正中的增加的驱动电流来驱动步进电机，当可手动操作的外部控制构件为 在时间校正期间启动。 在第二优选实施例中，电子钟表包括顺时针校正开关，逆时针校正开关和用于以比正常驱动脉冲高的预定频率产生第一和第二脉冲宽度的第一和第二交流脉冲的电路装置，以驱动 分别在顺时针和逆时针方向上的步进电机分别在时间校正期间启动顺时针和逆时针校正开关时执行顺时针和逆时针校正。 选择第二交流脉冲的脉冲宽度小于正常驱动脉冲的脉冲宽度。
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