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    • 8. 发明授权
    • Variable focal length camera
    • 可变焦距长焦相机
    • US5099263A
    • 1992-03-24
    • US610453
    • 1990-11-09
    • Toshiaki MatsumotoTakeo HodaYoshiaki HataMasatoshi KamitaniNorihiro Inoue
    • Toshiaki MatsumotoTakeo HodaYoshiaki HataMasatoshi KamitaniNorihiro Inoue
    • G03B19/07
    • G03B19/07
    • The present invention provides a bifocal camera capable of changing focal length of a photographic lens system and having lens drive means operable by a motor to switch the photographic lens system between a first focal length state wherein a main lens component is located at a rear position and a second focal length state wherein the main lens component is located at a front position and an auxiliary lens component is located at an operative position. This camera comprises a device for automatically stopping the motor when shifting of the main lens component is interrupted by force, and a device for restricting the shifting of the main lens component between the front position and the rear position. The auxiliary lens component is moved and a lens barrier is opened and closed in interlocked relationship with the shifting of the main lens component.
    • 本发明提供了一种能够改变摄影透镜系统的焦距并具有可由电动机操作的透镜驱动装置的双焦照相机,以便在主透镜部件位于后方位置的第一焦距状态和 第二焦距状态,其中主透镜部件位于前方位置,辅助透镜部件位于操作位置。 该照相机包括用于当通过力中断主透镜部件的移动时自动停止电动机的装置,以及用于限制主透镜部件在前位置和后位置之间移位的装置。 辅助透镜部件被移动,并且透镜屏障与主透镜部件的偏移以互锁关系打开和关闭。