Light shielding structure of a lens barrel
AssigneePENTAX Corporation
InventorHitoshi Tanaka
Life of this patent
Estimating the term…
Abstract
A light shielding structure of a lens barrel including an inner ring and an outer ring, wherein the inner ring includes a through cutout portion, the light shielding structure including an inner flange wall provided with the inner ring; a first annular groove formed on an inner surface of the inner flange wall; a second annular groove formed on an inner peripheral surface of the outer ring; and a light shield ring, wherein the light shield ring includes a cylindrical portion centered about the optical axis, and an outer flange portion which extends radially outwards from a rear end of the cylindrical portion so that the cylindrical portion and the outer flange portion and inserted into the first and second annular grooves, respectively.
Claims20
A light shielding structure of a lens barrel including an inner ring and an outer ring positioned outside said inner ring so that at least one of said inner ring and said outer ring rotates relative to the other, said inner ring and said outer ring being configured to move along an optical axis of the lens barrel without relative axial movement therebetween, wherein said inner ring includes at least one cutout portion which radially extends through said inner ring, said light shielding structure comprising:
- an inner flange wall provided with said inner ring and positioned at a front end surface of said inner ring;
- a first annular groove provided on a rear facing surface of said inner flange wall, said first annular groove being centered about the optical axis;
- a second annular groove provided on an inner peripheral surface of said outer ring;
- and
- a light shield ring which includes a cylindrical portion centered about said optical axis, and an outer flange portion which extends radially outwards from a rear end of said cylindrical portion so that said cylindrical portion extends into said first annular groove to be slidably movable relative thereto, and so that said outer flange portion extends into said second annular groove to be slidably movable relative thereto.
A light shielding structure of a lens barrel, the lens barrel including an inner ring and an outer ring positioned externally of said inner ring, said inner ring and said outer ring being mounted for relative rotation with respect of each other, said inner ring and said outer ring being configured to move alone an optical axis of the lens barrel without relative axial motion therebetween, said light shielding structure comprising:
- an inner flange wall mounted to a front end surface of said inner ring and movable together with said inner ring;
- a first annular groove provided on rear facing surface of said inner flange wall;
- a second annular groove provided on an inner peripheral surface of said outer ring, and
- a light shield ring, said light shield ring comprising a cylindrical portion and an outer flange portion which extends radially outwardly from a rear end of said cylindrical portion, said light shield ring being configured so that said cylindrical portion extends into said first annular groove and is slidably movable relative to said first annular groove, and said outer flange portion extends into said second annular groove and is slidably movable relative to said second annular groove.
Dependencies are inferred from the claim text.