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US 5,335,036 AGranted
Shutter device for camera
AssigneeCanon Kabushiki Kaisha
InventorChikara Aoshima
Life of this patent
Estimating the term…
Abstract
A shutter device for a camera includes shutter blades arranged to be movable to a first position in which the shutter closes and to a second position in which the shutter opens, and a switching part arranged to change a clearance provided between the shutter blades along an optical axis from a first state over to a second state in which the clearance is narrower than in the first state.
Claims27
A shutter device for a camera, comprising:
- a) a plurality of shutter blades arranged to be movable to a first position for closing and to a second position for opening;
- and
- b) switching means for changing a clearance provided between said plurality of shutter blades along an optical axis from a first state over to a second state in which said clearance is narrower than in said first state, said switching means being capable of changing from said first state to said second state at the first position of said plurality of shutter blades.
A camera having a shutter device, comprising:
- a) a plurality of shutter blades arranged to be movable to a first position for closing and to a second position for opening;
- and
- b) switching means for changing a clearance provided between said plurality of shutter blades along an optical axis from a first state over to a second state in which said clearance is narrower than in said first state, said switching means being capable of changing from said first state to said second state at the first position of said plurality of shutter blades.
An optical apparatus having a shutter device, comprising:
- a) a moving lens arranged to move in the direction of an optical axis thereof;
- b) a plurality of shutter blades arranged to be movable to a first position for closing and to a second position for opening;
- and
- c) a switching mechanism arranged to change a clearance provided between said plurality of shutter blades along the optical axis from a first state over to a second state in which said clearance is narrower than in said first state, said switching mechanism being capable of changing from said first state to said second state at the first position of said plurality of shutter blades.
1 more element
Dependencies are inferred from the claim text.