Light-quantity control device with spring control of light contr

Details Light-quantity control device with spring control of light contr Light-quantity control device with spring control of light contr

1995-04-06

1998-05-05

Metjahic, Safet

Photography

Camera detail

Diaphragm

396510, G03B 906

Patent

active

057490155

ABSTRACT:
A light-quantity control device having a light-quantity control member which moves to change an aperture opening amount. A drive source swings the light-quantity control member in one direction and a spring having a coil part urges the light-quantity control member against the swinging direction of the drive source. A base member having an aperture fixedly supports the drive source and swingably supports the light-quantity control member. The base member has a shaft for carrying the coil part of the spring. The shaft is formed at a position outside the supporting position of the drive source on the base member relative to the center of the aperture.

REFERENCES:
patent: 5313244 (1994-05-01), Arai

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