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

IPC分类号： H02K11/00 ,  H02K37/16

CPC分类号： H02K11/00 ,  H02K37/16

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。

公开(公告)号：US4763155A

公开(公告)日：1988-08-09

申请号：US4140

申请日：1987-01-13

申请人： Hajime Oda ,  Hiroyuki Saito ,  Keiji Arai ,  Atsushi Misawa ,  Toshiya Tamura ,  Michio Taniwaki ,  Katsuhito Niwa

发明人： Hajime Oda ,  Hiroyuki Saito ,  Keiji Arai ,  Atsushi Misawa ,  Toshiya Tamura ,  Michio Taniwaki ,  Katsuhito Niwa

IPC分类号： G03B7/10 ,  G03B7/26 ,  G03B9/62 ,  G03B7/097

CPC分类号： G03B9/62 ,  G03B7/10 ,  G03B7/26

摘要： A camera has a shutter device driveable to undergo opening movement to open an aperture to effect exposure operation according to a given exposure value, and a motor actuatable to rotate at an unstable rotational speed for driving the shutter device. A detector operates after the motor starts rotating and before the shutter device undergoes its opening movement for detecting the rotational speed of the motor. A controller adjusts the shutter device in accordance with the detected rotational speed of the motor to thereby enable the shutter device to effect the exposure operation so as to accurately achieve the given exposure value.

摘要翻译： 照相机具有可驱动的开闭装置，以便根据给定的曝光值进行打开光圈以进行曝光操作，以及电动机可致动以以不稳定的转速旋转以驱动快门装置。 在电动机开始旋转之后并且在快门装置进行其打开运动以检测电动机的转速之前，检测器运行。 控制器根据检测到的电动机的转速来调节快门装置，从而使快门装置能够进行曝光操作，从而准确地达到给定的曝光值。

公开(公告)号：US4937603A

公开(公告)日：1990-06-26

申请号：US370236

申请日：1989-06-22

申请人： Yukio Morino ,  Yoichi Seki ,  Michitaka Nakazawa ,  Toshiaki Hirai ,  Yusuke Konishi ,  Michio Taniwaki ,  Katsuhito Niwa ,  Kenichi Watanabe

发明人： Yukio Morino ,  Yoichi Seki ,  Michitaka Nakazawa ,  Toshiaki Hirai ,  Yusuke Konishi ,  Michio Taniwaki ,  Katsuhito Niwa ,  Kenichi Watanabe

IPC分类号： G03B7/097 ,  G03B7/10 ,  G03B9/08

CPC分类号： G03B7/10 ,  G03B9/08

摘要： A camera capable of multiple exposure photography. The camera has a lens shutter for performing a programmed exposure operation and a diaphragm-adjusting operation and a focal-plane shutter. The camera further includes a first selector means and a second selector means. The operation mode of the camera is switched between a lens shutter mode and a focal-plane shutter mode by the first selector means. In the lens shutter mode, the lens shutter is operated as a programmed shutter. In the focal-plane shutter mode, the shutter speed and the aperture are controlled by the focal-plane shutter and the lens shutter, respectively. The second selector means establishes a multiple exposure photographic mode. Also, the second selector means sets up the lens shutter mode irrespective of the setting of the first selector means.

摘要翻译： 能够进行多次曝光摄影的相机。 该相机具有用于执行编程曝光操作和光阑调节操作和焦平面快门的透镜快门。 照相机还包括第一选择装置和第二选择装置。 通过第一选择器装置在镜头快门模式和焦平面快门模式之间切换照相机的操作模式。 在镜头快门模式下，镜头快门作为编程快门操作。 在焦平面快门模式下，快门速度和光圈分别由焦平面快门和透镜快门控制。 第二选择器装置建立多曝光照相模式。 此外，第二选择器装置设置透镜快门模式，而与第一选择器装置的设置无关。