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    • 8. 发明授权
    • Braking device for shutter
    • 快门制动装置
    • US4692009A
    • 1987-09-08
    • US777858
    • 1985-09-18
    • Yasuhiro ToyodaFumio ShimadaKatsumi Yoshida
    • Yasuhiro ToyodaFumio ShimadaKatsumi Yoshida
    • G03B9/36G03B9/18G03B9/40
    • G03B9/18
    • The present invention relates to a braking device for a focal plane shutter in a camera. In the early stage of a braking operation on a shutter curtain, a relatively weak braking force is applied, and in the closing stage of the braking operation, a strong braking force is applied to insure that without causing the shutter curtain to bounce or to be damaged by shock, the shutter curtain is stopped. The device is constructed from two brake members arranged so that in the early stage the first brake member takes action, and in the closing stage, the second brake member takes action to add a braking force to that of the first brake member.
    • 本发明涉及一种用于相机中的焦平面快门的制动装置。 在快门帘幕的制动操作的早期阶段,施加相对较弱的制动力,并且在制动操作的关闭阶段,施加强制动力以确保不会使快门帘幕弹起 震动损坏,快门帘被停止。 该装置由两个制动构件构成,其布置成使得在早期阶段中,第一制动构件作用,并且在关闭阶段,第二制动构件采取动作以向第一制动构件的制动力增加制动力。
    • 9. 发明授权
    • Shutter device
    • 快门装置
    • US5749014A
    • 1998-05-05
    • US768337
    • 1996-12-17
    • Fumio Shimada
    • Fumio Shimada
    • G03B9/18G03B9/40
    • G03B9/18
    • A shutter device comprises a shutter blade which operates according to an exposure operation, a first blade driving spring for giving an urging force working in a predetermined direction to the shutter blade substantially over an entire operating range of the shutter blade, a second blade driving spring for giving the shutter blade an urging force working in the same direction as the first blade driving spring, and a charging mechanism for charging the first blade driving spring and the second blade driving spring. Since the charging mechanism includes a first charging member which travels to charge the first blade driving spring and a second charging member which travels to charge the second blade driving spring, the timings of charging the respective springs and the torques required to charge the respective springs can be optimally set.
    • 一种快门装置,包括根据曝光操作操作的快门叶片,用于在快门叶片的整个操作范围内向快门叶片施加沿预定方向工作的推动力的第一叶片驱动弹簧,第二叶片驱动弹簧 用于使快门叶片沿与第一叶片驱动弹簧相同的方向工作的推动力,以及用于对第一叶片驱动弹簧和第二叶片驱动弹簧充电的充电机构。 由于充电机构包括向第一叶片驱动弹簧进行充电的第一充电构件和向第二叶片驱动弹簧充电的第二充电构件,因此各个弹簧的充电定时和对各个弹簧充电所需的转矩的定时 最佳设定