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公开(公告)号：US4864347A
公开(公告)日：1989-09-05
申请号：US176942
申请日：1988-04-04
CPC分类号： G03B7/097
摘要： A program shutter has a plurality of shutter sectors driven in opening and closing directions by a reversible stepping motor to define a lens aperture during an exposure operation. An arithmetic circuit calculates an exposure amount corresponding to the brightness of the object being photographed, and a counting circuit outputs a pulse count corresponding to the number of steps through which the stepping motor should be rotated based on the calculated exposure amount. A pulse circuit produces driving pulses equal in number to the number of steps determined by the counting circuit, and a time circuit determines the ON/OFF periods of the driving pulses based on the calculated exposure amount. The driving pulses are applied to the stepping motor through a driving circuit to accordingly drive the shutter sectors in the opening and closing directions during the exposure operation.
摘要翻译： 节目快门具有通过可逆步进电机在打开和关闭方向上驱动的多个快门扇区，以在曝光操作期间限定透镜孔径。 算术电路计算与拍摄对象的亮度相对应的曝光量，并且计数电路基于计算出的曝光量输出与步进电机应该旋转的步数相对应的脉冲数。 脉冲电路产生与由计数电路确定的步数相等的驱动脉冲，并且时间电路基于所计算的曝光量确定驱动脉冲的接通/断开周期。 驱动脉冲通过驱动电路施加到步进电机，从而在曝光操作期间相应地在开闭方向上驱动快门扇区。
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公开(公告)号：US5060000A
公开(公告)日：1991-10-22
申请号：US427037
申请日：1989-10-25
申请人： Masuo Ogihara , Hiroyuki Ishida , Shinji Nagaoka , Youichi Seki , Shigeru Tagami , Hiroshi Yamazaki , Nobuo Shinozaki
发明人： Masuo Ogihara , Hiroyuki Ishida , Shinji Nagaoka , Youichi Seki , Shigeru Tagami , Hiroshi Yamazaki , Nobuo Shinozaki
摘要： A drive ring drivable by a stepping motor is normally urged by a spring to turn in one direction around a lens aperture. When not in use, the stepping motor is not subjected to the resilient force from the spring since the drive ring is locked against rotation by a ratchet wheel engaged by an engagement lever. The stepping motor is therefore not subjected to undue stresses and is prevented from malfunctioning. Consequently, focusing failures and exposure adjustment failures which could otherwise arise from malfunctioning of the stepping motor are prevented from occurring. In operation, a solenoid is energized to move the engagement lever out of engagement with the ratchet wheel, which is then freed to allow the drive ring to be turned by the stepping motor.
摘要翻译： 由步进电机驱动的驱动环通常由弹簧推动以围绕透镜孔向一个方向转动。 当不使用时，步进电机不受弹簧的弹力，因为驱动环被接合杆啮合的棘轮锁定以防旋转。 因此，步进电机不会受到过大的应力，并且不会发生故障。 因此，防止由于步进电机故障引起的聚焦故障和曝光调整故障发生。 在操作中，螺线管被通电以将接合杆移动脱离与棘轮的接合，然后释放该棘轮，以允许驱动环由步进电机转动。
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公开(公告)号：US4881096A
公开(公告)日：1989-11-14
申请号：US15169
申请日：1987-02-17
申请人： Masuo Ogihara , Hiroyuki Ishida , Shinji Nagaoka , Youichi Seki , Shigeru Tagami , Hiroshi Yamazaki , Nobuo Shinozaki
发明人： Masuo Ogihara , Hiroyuki Ishida , Shinji Nagaoka , Youichi Seki , Shigeru Tagami , Hiroshi Yamazaki , Nobuo Shinozaki
摘要： A camera shutter has an automatic focusing lens operative when actuated to effect an automatic focusing operation. An actuating ring is normally placed in a non-operating region and momentarily shifted to an operating region during the automatic focusing operation. The actuating ring is sequentially displaceable in forward and reverse direction through the operating region to actuate the automatic focusing lens, and displaceable in the forward and reverse directions in the non-operating region without effecting actuation of the automatic focusing lens. A ratchet mechanism is coupled to the actuating ring for selectively locking and unlocking the actuating ring in the non-operating region in response to the displacement thereof in the forward and reverse directions. A bi-directionally rotatable stepping motor is connected to drive the actuating ring to displace the same in the forward and reverse directions.
摘要翻译： 相机快门具有自动聚焦透镜，当被致动时可操作以实现自动聚焦操作。 致动环通常放置在非操作区域中，并且在自动对焦操作期间暂时移动到操作区域。 致动环可以在正向和反向方向上顺序地通过操作区域移动，以启动自动聚焦透镜，并且在非操作区域中可沿前后方向移位，而不影响自动聚焦透镜的致动。 棘轮机构联接到致动环，用于响应于其在正向和反向的位移而选择性地在非操作区域中锁定和解锁致动环。 连接双向旋转的步进电动机以驱动致动环，以沿前后方向使其移动。
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公开(公告)号：US4782353A
公开(公告)日：1988-11-01
申请号：US706127
申请日：1985-02-27
申请人： Masuo Ogihara , Shigeru Tagami , Nobuo Shinozaki
发明人： Masuo Ogihara , Shigeru Tagami , Nobuo Shinozaki
IPC分类号： G03B9/08
CPC分类号： G03B9/08
摘要： In a program shutter using a stepping motor for opening and closing sectors, the stepping motor is composed of a 4-pole magnetized rotor and two sets of U-shaped stators and coils, the stators being each provided with a pair of leg portions which are formed with magnetic poles at end portions thereof in an opposed relation to the outer periphery of the rotor, the magnetic poles at the leg end portions of each stator being formed in a phase relation of 90.degree. with respect to the rotational center of the rotor, and one magnetic poles of the stators being disposed in proximity to each other so as to in a phase relation of 45.degree. with respect to the rotational center of the rotor.
摘要翻译： 在使用步进马达开闭扇区的程序快门中，步进电机由4极磁化转子和两组U形定子和线圈构成，定子分别设有一对脚部， 在与转子的外周相对的端部形成有磁极，每个定子的腿端部的磁极相对于转子的旋转中心以90°的相位关系形成， 并且定子的一个磁极彼此相邻地设置成相对于转子的旋转中心成45度的相位关系。
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公开(公告)号：US5109250A
公开(公告)日：1992-04-28
申请号：US452565
申请日：1989-12-18
申请人： Nobuo Shinozaki , Yoichi Seki , Shigeru Tagami
发明人： Nobuo Shinozaki , Yoichi Seki , Shigeru Tagami
摘要： A program shutter for automatic exposure control including a forwardly/reversibly rotatable step motor for opening and closing a shutter to effect automatic exposure in the control circuit for controlling the operation of the step motor. The control circuit includes stored predetermined shutter mechanism characteristic values. The reversible stepping motor varies the lens aperture in response to a pulsed lens control signal generated by the control circuit. The corresponding value associated with each pulse is varied to be synchronized with and dependent on the shutter mechanism characteristic values and correspondingly varies the rotational power of the reversible stepping motor to overcome detrimental inherent shutter mechanism characteristics and to increase the response efficiency of the shutter.
摘要翻译： 一种用于自动曝光控制的程序快门，包括用于打开和关闭快门的向前/可逆旋转步进电机，以在控制电路中实现自动曝光，以控制步进电机的操作。 控制电路包括存储的预定的快门机构特性值。 响应于由控制电路产生的脉冲透镜控制信号，可逆步进电机改变透镜孔径。 与每个脉冲相关联的对应值被改变以与快门机构特征值同步并且取决于快门机构特征值，并且相应地改变可逆步进电机的旋转功率，以克服有害的固有快门机构特性并提高快门的响应效率。
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公开(公告)号：US4864346A
公开(公告)日：1989-09-05
申请号：US132463
申请日：1987-12-14
申请人： Nobuo Shinozaki , Shigeru Tagami , Masaki Tanaka , Katauhito Niwa
发明人： Nobuo Shinozaki , Shigeru Tagami , Masaki Tanaka , Katauhito Niwa
摘要： There is disclosed a program shutter for use in a camera. The program shutter consists of a shutter mechanism and a control portion. The shutter mechanism has sectors for defining an opening and a stepper motor for driving the sectors. The control portion produces pulses having pulse width conforming to the operating characteristic of the shutter mechanism. These pulses are used to step the motor forward or backward according to the exposure corresponding to the luminance of the subject.
摘要翻译： 公开了一种在相机中使用的程序快门。 节目快门由快门机构和控制部分组成。 快门机构具有用于限定开口的扇区和用于驱动扇区的步进电机。 控制部分产生具有符合快门机构的操作特性的脉冲宽度的脉冲。 这些脉冲用于根据与被摄体的亮度对应的曝光来向前或向后地步进电动机。
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公开(公告)号：US5181063A
公开(公告)日：1993-01-19
申请号：US719875
申请日：1991-06-24
申请人： Shigeru Tagami , Kazuo Akimoto , Kanji Ito , Katsuhiko Matsushita
发明人： Shigeru Tagami , Kazuo Akimoto , Kanji Ito , Katsuhiko Matsushita
摘要： A camera shutter system has a motor driven sector for opening and closing a shutter opening. A photo-interruptor is positioned to intercept a light beam, to effect the generation of a photo-interruptor signal. A timer has a counter that is set to a first count in response to the photo-interruptor signal, and is reset when a given count is reached. A shutter malfunction signal is generated when the level of the photo-interruptor signal has not changed by the time the given count is reached.
摘要翻译： 相机快门系统具有用于打开和关闭快门开口的马达驱动扇区。 一个光电断路器被定位成拦截一个光束，以产生一个光电断路器信号。 定时器具有响应于光电断路器信号而被设置为第一计数的计数器，并且在达到给定计数时被复位。 当光接收器信号的电平没有改变到达到给定计数的时间时，产生快门故障信号。
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公开(公告)号：US5181064A
公开(公告)日：1993-01-19
申请号：US719866
申请日：1991-06-24
申请人： Shigeru Tagami , Kazuo Akimoto , Katsuhiko Matsushita , Kanji Ito
发明人： Shigeru Tagami , Kazuo Akimoto , Katsuhiko Matsushita , Kanji Ito
摘要： A camera shutter system has a motor driven sector for opening and closing a shutter opening. A photo-interruptor is positioned to intercept a light beam, to effect the sequential generation of first and second photo-interruptor signal pulses, the first pulse having a width that is a function of the speed of the sector. A timer has a counter that is set to a first count corresponding to an exposure value that is a function of the brightness of an object to be photographed and the width of the first photo-interruptor signal. The timer is controlled to count down in response to the second photo-interruptor signal, and the sector driving motor is energized during the count down of the timer.
摘要翻译： 相机快门系统具有用于打开和关闭快门开口的马达驱动扇区。 光中断器被定位成截取光束，以实现第一和第二光中断器信号脉冲的顺序生成，第一脉冲具有作为扇区速度的函数的宽度。 定时器具有被设置为对应于作为要拍摄对象的亮度和第一光中断信号的宽度的函数的曝光值的第一计数的计数器。 定时器被控制为响应于第二光中断器信号倒计时，并且扇区驱动电机在定时器的倒计时期间被通电。
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公开(公告)号：US5068562A
公开(公告)日：1991-11-26
申请号：US438557
申请日：1989-11-17
申请人： Shigeru Tagami , Yoshio Umedu , Katsuhito Niwa
发明人： Shigeru Tagami , Yoshio Umedu , Katsuhito Niwa
摘要： A small stepping motor has a rotor comprised of a rotatably mounted and radially magnetized permanent magnet having a plurality of magnetic poles, a stator having a plurality of magnetic pole portions positioned to face the rotor, a coil wound around the stator, and a driving circuit for controlling the exciting current supplied to the coil. A leakage flux converging member is positioned in the vicinity of the stator so that leakage magnetic flux from the stator or the coil is converged by the leakage flux converging member so as to pass through the stator.
摘要翻译： 小型步进电动机具有转子，其包括具有多个磁极的可旋转地安装的和径向磁化的永磁体，定子具有定位成面对转子的多个磁极部分，缠绕在定子上的线圈和驱动电路 用于控制提供给线圈的励磁电流。 漏磁通会聚构件位于定子附近，使得来自定子或线圈的漏磁通量被漏磁通量会聚构件会聚，以便通过定子。
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公开(公告)号：US5291237A
公开(公告)日：1994-03-01
申请号：US874285
申请日：1992-04-24
申请人： Shigeru Tagami , Tomihiko Aoyama , Teruyo Hayakawa , Hiroshi Yamazaki , Yuji Nakajima , Seiichi Imano
发明人： Shigeru Tagami , Tomihiko Aoyama , Teruyo Hayakawa , Hiroshi Yamazaki , Yuji Nakajima , Seiichi Imano
摘要： A camera has a shutter which may also constitute a diaphragm. In a multi-flash mode the shutter selectively has a maximum aperture at an onset or at the end of the time base. The flash occurs in synchronism with a shutter waveform shaped by this aperture area and a time base element. In a second embodiment, a second diaphragm setting circuit is provided, in diaphragm priority photography, for computing a measurement value of a distance to a subject and a second diaphragm value from the guide number during an emission of flashed light. The diaphragm is set to the computed second diaphragm value, ad an electronic flash is energized with a desired aperture area. The diaphragm is set to an initial value to effect the photography at a time other than during the emission of flashed light. A timing circuit may be provided for setting the diaphragm to the second diaphragm value. The aperture area may be increased or decreased for diaphragm matching with the quantity of flashed light and the distance to the subject during diaphragm priority flash photography.
摘要翻译： 相机具有也可以构成隔膜的快门。 在多闪光模式中，快门在时基的开始或结束时选择性地具有最大光圈。 闪光与由该开口区域和时基元件形成的快门波形同步地发生。 在第二实施例中，在隔膜优先摄影中设置第二隔膜设置电路，用于在闪光灯发射期间计算距离被摄体的距离的测量值和来自引导号的第二光阑值。 光阑被设定为计算出的第二光阑值，电子闪光灯被所需的光圈区域通电。 隔膜被设置为初始值，以在除了发光之前的时间进行摄影。 可以提供定时电路用于将隔膜设置到第二隔膜值。 在光圈优先闪光摄影期间，可以增加或减少光圈匹配与闪光量和被摄体距离的光圈面积。
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