Patent
1991-02-15
1993-01-05
Gellner, Michael L.
3541951, G03B 300
Patent
active
051775247
ABSTRACT:
A control device of an automatic focusing lens which can be operated in an automatic focusing mode and a manual focusing mode. The control device is provided with a lens moving ring to which a lens and a clutch are connected. The clutch is selectively connected to a motor or a friction member. In the manual focusing mode, the clutch is connected to the friction member and disconnected from the motor. In the automatic focusing mode, the clutch is connected to the motor and disconnected from the friction member. The control device further includes a restricting mechanism by which a movement of the lens is restricted in the automatic focusing mode, and a switching mechanism by which the automatic focusing lens is switched to be operated in the automatic focusing mode or the manual focusing mode, and the restricting mechanism is activated. The switching mechanism is constructed as a single mechanism.
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English Abstract of Japanese Patent 1-205112.
Asahi Kogaku Kogyo Kabushiki Kaisha
Gellner Michael L.
Noh Jae N.
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