Lens barrel and CAM mechanism therefor

Details Lens barrel and CAM mechanism therefor Lens barrel and CAM mechanism therefor

1997-08-18

1999-03-23

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359823, G02B 1514, G02B 702

Patent

active

058868321

ABSTRACT:
A lens barrel having a cam cylinder formed with a cam groove having two side surfaces and a lens holding frame provided with a cam follower inserted into the cam groove and guided in contact with one of the two side surfaces. The cam follower includes an elastic member in elastic contact with the other side surface of the cam groove to absorb a play between the cam groove and the cam follower. A distance between the two side surfaces of the cam groove becomes smaller in a direction of depth of the cam groove; and there is a clearance between the cam follower and the other side surface.

REFERENCES:
patent: 4322151 (1982-03-01), Weiss
patent: 4707083 (1987-11-01), Iizuka et al.
patent: 5376983 (1994-12-01), Yamazaki et al.

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