Lens barrel

Details Lens barrel Lens barrel

1993-08-26

1994-04-26

Gellner, Michael L.

354187, 35419512, G03B 118, G03B 1704

Patent

active

053071034

ABSTRACT:
A lens barrel comprises a fixed cylinder, a driving gear to which torque from a driving member is transmitted, and external gear to be engaged with the driving gear, a rotary cylinder which rotates itself to advance and retreat in the direction of the optical axis with respect to the fixed cylinder, and a lens holding cylinder which is set inside the inner periphery of an end of the rotary cylinder and holds a photographing lens shifted forward and backward in the direction of the optical axis by the rotary cylinder, wherein the driving gear moves forward and backward, which depends on the directions of its own rotation, in the same direction as the rotary cylinder.

REFERENCES:
patent: 5198932 (1993-03-01), Takamura
patent: 5255035 (1993-10-01), Kichima

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