Eyepiece shutter for use with a camera

Details Eyepiece shutter for use with a camera Eyepiece shutter for use with a camera

1997-06-25

1999-01-12

Perkey, W. B.

Photography

With viewfinder

G03B 1302

Patent

active

058600345

ABSTRACT:
When a shutter release button is pressed, a shutter drive member (8) moves downward in conjunction with the pressing action of the shutter release button. As a result, a lever (28) pivots clockwise, and a lever (26) whose lever piece (30) is connected at the front end to the lever (28) by a torsion spring (50) pivots counterclockwise. By means of a lever piece (34), an elongated hole (36), and a pin (24A), the light-shielding plate (12) moves to the lowermost position where pins (22, 23) come into contact with the lowermost ends of elongated holes (18, 20). As a result, the opening (14) of the base plate (10) and the finder eyepiece window (16) are closed by the light-shielding plate (12), whereby the optical path of the finder optical system is interrupted. Thereafter, a metering operation for automatic exposure purposes is performed.

REFERENCES:
patent: 3975750 (1976-08-01), Yoshino et al.
patent: 4853787 (1989-08-01), Kurth
patent: 5619266 (1997-04-01), Tomita et al.

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