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    • 10. 发明授权
    • Photographic camera
    • 摄影相机
    • US4868595A
    • 1989-09-19
    • US273724
    • 1988-11-17
    • Yoshihiro TanakaSadafusa TsujiYoshiaki HataManabu InoueHiroshi OotsukaMichihiro IwataFumiaki IshitoKoh Hayama
    • Yoshihiro TanakaSadafusa TsujiYoshiaki HataManabu InoueHiroshi OotsukaMichihiro IwataFumiaki IshitoKoh Hayama
    • G02B7/08G03B9/08G03B9/10G03B15/05H02N2/06
    • G03B9/08
    • A photographic camera of the type including a piezo-electric actuating element driven by energy accumulated in a capacitor for actuating a shutter wherein the piezo-electric element operates in stability to assure accurate appropriate opening and closing operation of the shutter of the camera and the capacitor is charged up rapidly to allow subsequent photographing operation to be done in a minute. In the camera, a charged voltage of the capacitor is checked several times to determine if it is sufficient to assure proper operation of the piezo-electric element, and if a then required level is not reached, then the capacitor is charged to the required voltage. While the capacitor is being charged, charging of a capacitor for a flash is inhibited. For operation of the shutter, a negative voltage is first applied across the piezo-electric element to set the same to its fixed home position, and then a positive voltage is applied to move the shutter from the home position to a predetermined opening position, whereafter the negative voltage is applied again to return the shutter to its initial position rapidly. The position of the shutter is also checked to assure proper operation of the camera.
    • 一种照相机,其类型包括由积累在用于致动快门的电容器中的能量驱动的压电致动元件,其中压电元件稳定地操作以确保相机和电容器的快门的精确的适当的打开和关闭操作 充电充电以允许随后的拍摄操作在一分钟内完成。 在相机中,检查电容器的充电电压几次以确定是否足以确保压电元件的正常工作,并且如果未达到所需的电平,则将电容器充电至所需电压 。 当电容器正在充电时,禁止对闪光灯的电容器充电。 对于快门的操作,首先在压电元件上施加负电压以将其设定为其固定的原始位置,然后施加正电压以将快门从原始位置移动到预定的打开位置,此后 再次施加负电压以快速将快门返回到其初始位置。 还检查快门的位置以确保相机的正常操作。