Rotatable ring supporting mechanism in lens barrel

Details Rotatable ring supporting mechanism in lens barrel Rotatable ring supporting mechanism in lens barrel

1994-09-07

1996-06-18

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359704, 359826, G02B 1514, G02B 702

Patent

active

055284302

ABSTRACT:
A supporting mechanism rotatably supports a rotatable ring on a cylindrical member in a lens barrel and includes a frictional member which is made from a member separate from the rotatable ring and the cylindrical member. The frictional member is provided on one of the rotatable ring and the stationary cylindrical member so as to come into sliding contact with the other of the stationary cylindrical member and the rotatable ring in a thrust direction.

REFERENCES:
patent: 3698254 (1972-10-01), Bradt
patent: 4269479 (1981-05-01), Hamatani
patent: 4496217 (1985-01-01), Aoyagi
patent: 4640579 (1987-02-01), Takizawa
patent: 4645310 (1987-02-01), Kohmoto
patent: 5066965 (1991-11-01), Tanaka

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