US 6,714,362 B2 · Lens shutter mechanism

Abstract

A lens shutter mechanism includes, between front and rear support frames having photographing apertures, shutter sectors which open and close the photographing apertures; a shutter drive ring which is rotatable about the optical axis to drive the shutter sectors; diaphragm sectors which change an aperture diameter of the photographing apertures independently of the shutter sectors; and a diaphragm drive ring which is rotatable about the optical axis to drive the diaphragm sectors. The shutter drive ring and the diaphragm drive ring are located at different radial positions and at the same optical axis position. One and the other of the shutter drive ring and the diaphragm drive ring is provided with an inner flange and an outer flange respectively, which radically project toward each other so as to overlap in the axial direction, and engage so as to be relatively slidable in the circumferential direction.

Claims17

Dependent claims

A lens shutter mechanism provided between front and rear support frames spaced in an optical axis direction and having photographing apertures, said lens shutter mechanism comprising:

shutter sectors which open and close said photographing apertures;
a shutter drive ring which is rotatable about the optical axis to drive said shutter sectors;
diaphragm sectors which change an aperture diameter of said photographing apertures independently of said shutter sectors;
and
a diaphragm drive ring which is rotatable about the optical axis to drive said diaphragm sectors;
wherein said shutter drive ring and said diaphragm drive ring are located at different radial positions and at the same position in the optical axis direction;
and
wherein one and the other of said shutter drive ring and said diaphragm drive ring is provided with an inner flange and an outer flange respectively, said inner flange and said outer flange projecting in a radial direction toward each other so as to overlap in the axial direction, and engaging so as to be relatively slidable in the circumferential direction.

5 more elements

A lens shutter mechanism comprising, between front and rear support frames spaced in an optical axis direction and having photographing apertures:

shutter sectors which open and close the photographing apertures;
a shutter drive ring which is rotated about the optical axis to drive said shutter sectors;
diaphragm sectors which change an aperture diameter of the photographing apertures independently of said shutter sectors;
and
a diaphragm drive ring which is rotated about the optical axis to drive said diaphragm sectors;
wherein said shutter drive ring and said diaphragm drive ring are located at different radial positions and at the same position in the optical axis direction, so that said shutter drive ring is located at an inner radial position and said diaphragm drive ring is located at an outer radial position;
and
wherein said diaphragm drive ring is provided with an inner flange which projects inwardly in the radial direction, and said shutter drive ring is provided with an outer flange which projects outwardly in the radial direction, said inner flange and said outer flange overlapping in the axial direction and engaging so as to be relatively slidable in the circumferential direction.

5 more elements

Dependencies are inferred from the claim text.

Lens shutter mechanism

Life of this patent

Lens shutter mechanism

Life of this patent

Abstract

Claims17