公开(公告)号：US20060226716A1

公开(公告)日：2006-10-12

申请号：US11386419

申请日：2006-03-22

申请人： Hisashi Kawamoto ,  Seiichi Oishi

发明人： Hisashi Kawamoto ,  Seiichi Oishi

IPC分类号： H02K37/14

CPC分类号： H02K37/14 ,  H02K1/14 ,  H02K5/15 ,  H02K37/16

摘要： A step motor includes a rotor having four magnetic poles, a first magnetic pole magnetically excited by a first coil, a second magnetic pole magnetically excited by a second coil, and a third magnetic pole magnetically excited by the first coil and the second coil. A gap between the third magnetic pole and the rotor is smaller than that between the first magnetic pole and the rotor and that between the second magnetic pole and the rotor. In the step motor, it is possible to intensify the influence, on the rotor having four poles, of the magnetic fields created from three magnetic poles. Accordingly, this can weaken the magnetic fields set up from the first magnetic pole and the second magnetic pole, which tend to intensify the influence on the rotor, enabling the torque smaller at the time of the rotation start of the rotor.

摘要翻译： 步进电动机包括具有四个磁极的转子，由第一线圈磁激励的第一磁极，由第二线圈磁激励的第二磁极和由第一线圈和第二线圈磁激励的第三磁极。 第三磁极和转子之间的间隙小于第一磁极和转子之间的间隙以及第二磁极和转子之间的间隙。 在步进电动机中，可以加强对由三个磁极产生的磁场的具有四个极的转子的影响。 因此，这可以削弱从第一磁极和第二磁极设置的磁场，这倾向于加强对转子的影响，使得转子旋转时的转矩变小。

公开(公告)号：US20060152093A1

公开(公告)日：2006-07-13

申请号：US11371980

申请日：2006-03-08

申请人： Seiichi Oishi ,  Hiroyuki Mizukami ,  Hisashi Kawamoto ,  Takashi Nakano

发明人： Seiichi Oishi ,  Hiroyuki Mizukami ,  Hisashi Kawamoto ,  Takashi Nakano

IPC分类号： H02K33/00 ,  H02K35/00 ,  H02K37/12 ,  H02K37/14

CPC分类号： H02K21/185 ,  H02K1/14

摘要： A sector drive mechanism includes an electromagnetic actuator including a rotor having four polarities, a C-shaped stator, and a current control portion that controls current applied to a first coil and a second coil, the C-shaped stator including a first magnetic pole magnetically excited by the first coil, a second magnetic pole magnetically excited by the second coil, and a third magnetic pole magnetically excited by the first coil and the second coil, and sectors that are connected to the electromagnetic actuator to open and close a shutter opening provided in a substrate. The first coil and the second coil are driven to close the shutter opening with a fewer number of pulses applied from the current control portion than the number of the pulses to open the shutter opening.

摘要翻译： 扇形驱动机构包括电磁致动器，其包括具有四个极性的转子，C形定子和控制施加到第一线圈和第二线圈的电流的电流控制部分，所述C形定子包括第一磁极 由第一线圈励磁，由第二线圈磁激励的第二磁极和由第一线圈和第二线圈磁激励的第三磁极，以及连接到电磁致动器以打开和闭合提供的快门开口的扇区 在基材中。 驱动第一线圈和第二线圈以从电流控制部分施加的脉冲数少于打开快门开口的脉冲数来关闭快门开口。

公开(公告)号：US06796729B2

公开(公告)日：2004-09-28

申请号：US10041275

申请日：2002-01-08

申请人： Hiroyuki Mizukami ,  Seiichi Imano ,  Atsushi Takami ,  Seiichi Oishi

发明人： Hiroyuki Mizukami ,  Seiichi Imano ,  Atsushi Takami ,  Seiichi Oishi

IPC分类号： G03B920

CPC分类号： G03B9/14

摘要： A shutter for a camera capable of opening a shutter sector in a reduced period of time includes a shutter opening formed in a shutter plate, shutter sectors for opening and closing the shutter opening, a drive lever having a drive pin for operating the shutter sectors, and an actuator for driving the drive lever. The drive pin penetrates through-holes formed in the shutter sectors. The through-holes have a size sufficiently large so that the drive lever is driven by the actuator substantially in a no-load state immediately after starting to drive the drive lever so that the shutter sectors are not moved until the drive pin has achieved sufficient acceleration.

摘要翻译： 用于能够在减少的时间段内打开快门扇区的相机的快门包括形成在快门板中的快门开口，用于打开和关闭快门开口的快门扇区，具有用于操作快门扇区的驱动销的驱动杠杆， 以及用于驱动驱动杆的致动器。 驱动销穿透形成在挡板扇区中的通孔。 通孔具有足够大的尺寸，使得驱动杆在开始驱动驱动杆之后立即由致动器基本上在无负载状态下驱动，使得活门扇区不移动直到驱动销已经达到足够的加速度 。

公开(公告)号：US06702484B2

公开(公告)日：2004-03-09

申请号：US10187581

申请日：2002-07-02

申请人： Munetaka Yamaga ,  Hiroyuki Mizukami ,  Seiichi Oishi

发明人： Munetaka Yamaga ,  Hiroyuki Mizukami ,  Seiichi Oishi

IPC分类号： G03B908

CPC分类号： G03B9/14

摘要： A camera shutter has a base plate provided with a shutter opening. Sectors are mounted on the base plate to undergo movement to open and close the shutter opening. A driving lever has a driving pin that extends through through-holes in the sectors for operating the sectors. One of the through-holes is configured so that a gap is formed between an edge of the through-hole and the driving pin in the direction of movement of the driving pin. As the driving pin moves to drive the sectors to close the shutter opening, the movement of the driving pin is abruptly stopped when the sectors fully close the shutter opening thereby causing the driving pin to rebound. The rebounding motion is not transmitted to the sector in which the gap is formed, and inertia permits further movement of the sector in the closing direction over a distance equal to the gap. This maintains the sectors in overlapping relation and prevents reexposure when the shutter is in a fully closed state.

摘要翻译： 相机快门具有设置有快门开口的基板。 扇形体安装在基板上以进行运动以打开和关闭活门开口。 驱动杆具有延伸穿过用于操作扇区的扇区中的通孔的驱动销。 通孔中的一个构造成使得在驱动销的移动方向上在通孔的边缘和驱动销之间形成间隙。 当驱动销移动以驱动扇区以关闭快门开口时，当扇区完全关闭快门开口从而导致驱动销反弹时，驱动销的运动突然停止。 反弹运动不被传送到形成间隙的扇区，并且惯性允许扇区在关闭方向上进一步移动等于间隙的距离。 这保持扇区重叠关系，并防止快门处于完全关闭状态时的再曝光。