Apparatus for changing the size of the photographing aperture in a camera

An apparatus for protecting light intercepting plates in a photographing aperture size changing apparatus in a camera with a back cover, comprising;

• a pair of light intercepting plates which are movable between a retracted position in which an aperture of the camera is fully opened and a restricted-size position in which the aperture is partly restricted;
• a photographing aperture size changing mechanism which changes the size of a photographing aperture by movement of the light intercepting plates between the retracted position and the restricted-size position;
• and,
• a returning mechanism which drives the photographing aperture size changing mechanism to move the light intercepting plates to the retracted position in association with the movement of the back cover when the latter is opened.

An apparatus for changing a size of an aperture which defines a photographing aperture in a camera, comprising:

• a pair of light intercepting plates which can cover a predetermined area of end edges of the aperture to partly intercept light incident thereupon;
• and,
• an association mechanism which moves said light intercepting plates in association with each other between a retracted position in which the aperture is fully opened and a restricted-size position in which the aperture is partly covered,
• wherein said association mechanism comprises a shaft secured to a camera body, and a connecting rotatably member which is rotatably mounted to said shaft, and said connecting rotatable member comprises a pair of rotatable plates each having opposite ends;
• wherein one of said pair of light intercepting plates is provided with association arms extending towards the other of said pair of light intercepting plates, outside the aperture in the retracted position, so that one of said opposite ends of one of said rotatable plates is connected to one of said association arms, and the other of said opposite ends of said one of said rotatable plates is connected to the other of said pair of intercepting plates, so that the rotation of said connecting rotatable member causes associated movement of said light intercepting plates between the retracted position and the restricted-size position.