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    • 3. 发明授权
    • Drive system for electromagnetically driven shutter
    • 驱动电磁驱动系统
    • US4264162A
    • 1981-04-28
    • US48742
    • 1979-06-15
    • Ryoichi SuzukiYukio OgawaTakao KinoshitaTakashi Uchiyama
    • Ryoichi SuzukiYukio OgawaTakao KinoshitaTakashi Uchiyama
    • G03B7/081G03B7/083G03B7/087G03B9/42
    • G03B7/083
    • In the drive system disclosed, a first power source supplies a driving current to drive a moving member of an electromagnetic shutter driving device in one direction or in the reverse direction a second power source device consisting of a DC booster circuit, a capacitor, etc.; a photo-to-electric converter circuit discerns the brightness level of an object to be photographed and controls the outputs of the first and second power source devices to shift between these two outputs. An automatic change-over supplies the output of the second power source to the electromagnetic shutter driving device when the level of the output of the photo-to-electric converter circuit is equal to or above a predetermined level and supplies the output of the first power source to the electromagnetic shutter driving device when the output level of the photo-to-electric converter circuit is lower than the predetermined level.
    • 在所公开的驱动系统中,第一电源提供驱动电流以驱动电磁快门驱动装置的移动部件沿一个方向或相反方向由包括直流升压电路,电容器等的第二电源装置。 ; 光电转换器电路识别待拍摄对象的亮度级别,并控制第一和第二电源装置的输出在这两个输出之间移动。 当光电转换器电路的输出电平等于或高于预定电平时,自动切换将第二电源的输出提供给电磁快门驱动装置,并将第一功率的输出 当光电转换器电路的输出电平低于预定电平时,向电磁快门驱动装置供电。