Barrel driving device for camera

Details Barrel driving device for camera Barrel driving device for camera

1987-04-27

1988-09-06

Hix, L. T.

354402, G03B 310

Patent

active

047696648

ABSTRACT:
A barrel driving device for a camera including a distance adjusting ring having cam portions for axially moving a photographic lens barrel forward, ratchet teeth formed in the outer periphery of the distance adjusting ring, a ratchet arranged upon movement from an initial or first position to a second position to turn the distance adjusting ring in engagement with one of the ratchet teeth, and a pawl arranged upon engagement with one of the ratchet teeth to hinder the reverse movement of the distance adjusting ring, wherein there is provided a limiting member having an abutment surface against which the head of the ratchet abuts so that the ratchet is hindered from turning outwardly of the distance adjusting ring when it goes in the second position.

REFERENCES:
patent: 2900840 (1959-08-01), Greve
patent: 4560266 (1985-12-01), Namai et al.

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