Lens barrel and optical apparatus having the same
AssigneeCanon Kabushiki Kaisha
InventorYuki Nagao
Life of this patent
Estimating the term…
Abstract
Provided is a lens barrel which has a lens holding frame that holds a lens and has cam followers mounted on an outer circumferential portion thereof by screws and nuts and a cylinder member that has grooves into which the cam followers are fitted, and in which a position of the lens holding frame is regulated by the grooves. Holes into which the nuts are fitted and bottomed recesses with which bottoms of the cam followers come into contact are formed in places of the outer circumferential portion on which the cam followers are mounted, and axial end faces of the nuts protrude from the recesses to be fitted into inner circumferential portions of the cam followers.
Claims11
A lens barrel comprising:
- a lens holding frame that holds a lens;
- screws and nuts;
- cam followers each mounted on an outer circumferential portion of the lens holding frame with one of the screws and one of the nuts;
- and
- a cylindrical ring member having grooves into which the cam followers are disposed, and regulate a position of the lens holding frame,
- wherein the lens holding frame includes holes that receive the nuts and recesses that seat bottoms of the cam followers, and
- wherein axial end faces of the nuts protrude beyond bottoms of the recesses.
An optical apparatus having a lens barrel including:
- a lens barrel;
- and
- an image pickup device configured to receive light from the lens barrel,
- wherein the lens barrel includes:
- a lens holding frame that holds a lens;
- screws and nuts;
- cam followers each mounted on an outer circumferential portion of the lens holding frame with one of the screws and one of the nuts;
- and
- a cylindrical ring member having grooves into which the cam followers are disposed, and regulate a position of the lens holding frame,
- wherein the lens holding frame includes holes that receive the nuts and recesses that seat bottoms of the cam followers, and
- wherein axial end faces of the nuts protrude beyond bottoms of the recesses.
A lens barrel comprising:
- a lens holding frame that holds a lens;
- screws;
- cam followers each mounted on an outer circumferential portion of the lens holding frame with one of the screws;
- and
- a cylindrical ring member having grooves into which the cam followers are disposed, and regulate a position of the lens holding frame,
- wherein the lens holding frame includes:
- an axial portion protruding to an outside in a radial direction of the lens and including a female thread portion;
- and
- recesses that seat bottoms of the cam followers, the recesses being recessed inward toward the lens from an outer circumferential surface of the lens holding frame, and
- wherein an axial end face portion of the axial portion protrudes outwardly beyond a bottom of the recess.
Dependencies are inferred from the claim text.