Lens cap unit
AssigneeRicoh Company, Ltd.
InventorNaoyuki Yamashita
Life of this patent
Estimating the term…
Abstract
A lens cap unit includes a mounting part mounted on a fixed cylinder in which a movable lens cylinder is movably contained, at least one barrier provided on the mounting part to be movable between a closed position covering a leading end portion of the movable lens cylinder and an opened position opening the leading end portion of the movable lens cylinder, and a cam protrusion provided on the barrier. The cam protrusion engages with the movable lens cylinder at a position outside an effective diameter of the movable lens cylinder.
Claims19
A lens cap unit which is mounted on a lens barrel including a fixed cylinder and a movable lens cylinder which is provided in the fixed cylinder and is extendable from and collapsible in the fixed cylinder in a direction of optical axis, the lens cap unit comprising:
- a mounting part mounted on the fixed cylinder;
- at least one barrier provided on the mounting part to be movable between a closed position covering a leading end portion of the movable lens cylinder and an opened position opening the leading end portion of the movable lens cylinder;
- and
- a cam protrusion provided on the barrier,
- the barrier being supported on the mounting part to be rotatable about an opening and closing axis perpendicular to the optical axis,
- the cam protrusion being configured to extend from a surface of the barrier facing the movable lens cylinder and face the leading end portion of the movable lens cylinder, and to be disposed outside an effective diameter of the movable lens cylinder, in a state where the barrier covers a leading end portion of the movable lens cylinder.
A camera including a fixed cylinder, a movable lens cylinder which is extendable and collapsible in the fixed cylinder along an optical axis, and a lens cap unit,
- the lens cap unit comprising:
- at least one barrier provided to be movable between a closed position covering a leading end portion of the movable lens cylinder and an opened position opening the leading end portion of the movable lens cylinder;
- and
- a cam protrusion provided on the barrier, the barrier being rotatable about an axis perpendicular to the optical axis,
- the cam protrusion being configured to extend from a surface of the barrier facing the movable lens cylinder and face the leading end portion of the movable lens cylinder, and to be disposed outside an effective diameter of the movable lens cylinder, in a state where the barrier covers a leading end portion of the movable lens cylinder.
Dependencies are inferred from the claim text.