Lens barrel having a biasing member to prevent backlash between

Details Lens barrel having a biasing member to prevent backlash between Lens barrel having a biasing member to prevent backlash between

1995-12-13

1997-05-06

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359703, 359704, G02B 1514

Patent

active

056276834

ABSTRACT:
A lens barrel which has a lens holding member for holding a lens unit, a movement cam mechanism for moving the lens holding member in an optical-axis direction, a biasing member for biasing the lens holding member to shift a slide allowance of the movement cam mechanism in one direction, a biasing force receiving member for receiving a biasing force of the biasing member and a biasing force adjustment cam mechanism for moving the biasing force receiving member in the optical-axis direction so that the biasing force of the biasing member remains the same.

REFERENCES:
patent: 3506338 (1970-04-01), Holderbaum
patent: 4255020 (1981-03-01), Yukio
patent: 4764784 (1988-08-01), Torikoshi
patent: 4950061 (1990-08-01), Tsurukawa
patent: 4974949 (1990-12-01), Tanaka
patent: 5037187 (1991-08-01), Oda
patent: 5485315 (1996-01-01), Nomura
patent: 5488513 (1996-01-01), Tanaka
patent: 5515205 (1996-05-01), Yokoyama

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