Aperture and focus adjusting device for a camera
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorTahei Morisawa
Life of this patent
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Abstract
An aperture and focus adjusting device for a camera, is provided with only one reversible motor, a first adjusting mechanism, and a second adjusting mechanism. The first adjusting mechanism is rotated by a first member which is connected to the motor, and the second adjusting mechanism is rotated by a second member to which an intermediate rotational member is connected. The intermediate rotational member is in constant mesh and is rotated with the second member, and is engaged with the first member only within a sector of a rotational range of the first member, to rotate together with the first member. One of the first and second mechanisms is a focus adjusting mechanism, and the other is an aperture adjusting mechanism.
Claims9
An aperture adjusting device for a camera comprising:
- a rotatable aperture adjusting plate,
- an aperture adjusting mechanism controlling the value of aperture in accordance with a rotation angle of said aperture adjusting plate, and
- a reversible motor rotating to move said aperture adjusting plate frontward and rearward, said reversible motor being coaxially disposed about an optical axis of the aperture device,
- said reversible motor constantly holding said aperture adjusting plate a closed position, and rotating said aperture adjusting plate, in accordance with a release signal, from said closed position to a rotation position corresponding to an aperture value determined by a photometer, said aperture adjusting plate remaining at the position corresponding to an aperture value determined by a photometer, during operation of a shutter.
Dependencies are inferred from the claim text.