Lens barrel structure for waterproof camera

Details Lens barrel structure for waterproof camera Lens barrel structure for waterproof camera

1989-03-29

1991-10-15

Arnold, Bruce Y.

Optical: systems and elements

Protection from moisture or foreign particle

Sealing

354 64, 354187, 359825, 359704, G02B 702, G02B 1500, G03B 1708, G03B 1704

Patent

active

050569031

ABSTRACT:
A lens barrel for a waterproof or dustproof camera which can assure maintenance of a reliable liquid-tight or airtight condition between a movable lens barrel member and a fixed lens barrel member with a structure of a comparatively small size. The lens barrel comprises a fixed lens barrel member provided on a camera body, a movable lens barrel member mounted for movement on the fixed member between a position advanced outwardly from the camera body and another position retracted in the camera body, and a bellows member secured at an end thereof to an inner periphery of a rear portion of the movable member and at the other thereof to an inner periphery of a rear portion of the fixed member. The bellows member is folded back at an intermediate portion thereof between the movable member and the fixed member in such a manner as to surround a rear end of the movable member, and the folded back portion moves as the movable member is moved between the retracted position and the advanced position.

REFERENCES:
patent: 3877047 (1975-04-01), Douglas
patent: 4289390 (1981-09-01), Lermann et al.
patent: 4375323 (1983-03-01), Inagaki et al.
patent: 4547053 (1985-10-01), Tobler
patent: 4662734 (1987-05-01), Nishi
patent: 4666274 (1987-05-01), Maeno et al.
patent: 4763145 (1988-08-01), Takamura et al.

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