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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：US4361410A
公开(公告)日：1982-11-30
申请号：US158493
申请日：1980-06-11
申请人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
发明人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
摘要： In a circuit for driving a pulse motor of an electronic timepiece, the initial part or entirety of each drive pulse is modulated to form a group of high frequency pulses thereby reducing an initial surge of current while rotor of motor is still stationary. Modulation can be controlled according to load placed on motor to provide increased drive energy for heavy loading.
摘要翻译： 在用于驱动电子表的脉冲电动机的电路中，调制每个驱动脉冲的初始部分或全部以形成一组高频脉冲，从而在电动机的转子静止时减少初始的电流浪涌。 调制可以根据电机上的负载进行控制，为重负载提供更高的驱动能量。
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公开(公告)号：US4223522A
公开(公告)日：1980-09-23
申请号：US960516
申请日：1978-11-13
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：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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公开(公告)号：US4055785A
公开(公告)日：1977-10-25
申请号：US697364
申请日：1976-06-18
申请人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
发明人： Fumio Nakajima , Takayasu Machida , Kenji Yamada
摘要： A stepping motor for an electronic timepiece comprises a permanent magnet rotor, a stator and a driving coil, having at least one static equilibrium point for the rotor. The driving coil is arranged to be energized by a current smaller than a driving current so that the stator is energized to required polarities of low flux intensity, whereby the static equilibrium point for the rotor is electromagnetically shifted to an arbitrary position to permit rotation of the rotor in any desired direction.
摘要翻译： 一种用于电子钟表的步进电机包括永磁转子，定子和驱动线圈，其具有用于转子的至少一个静态平衡点。 驱动线圈被布置成被小于驱动电流的电流激励，使得定子被激励到所需的低通量强度的极性，由此转子的静态平衡点被电磁地移动到任意位置，以允许旋转 转子在任何所需的方向。
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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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