Lens barrel
AssigneeCanon Kabushiki Kaisha
InventorFutoshi Kobayashi
Life of this patent
Estimating the term…
Abstract
A lens barrel having a configuration lending itself to effectively reducing the size thereof and ensuring appropriate and safe operation thereof. The lens barrel includes a guiding portion provided for a lens holding member for guiding a cam follower in a radial direction of a cam barrel; a tabular elastic member provided for the lens holding member for urging the cam follower in a guiding direction of the guiding portion; and a regulating member limiting the transfer of the cam follower that is to be moved in a direction opposite to the urging direction by the elastic member. The regulating member is configured to be brought into contact with a predetermined portion of the lens holding member.
Claims6
A lens barrel for transferring a lens holding member in a light axis direction via a cam follower engaged with a cam of a cam barrel, the lens barrel comprising:
- a guide portion of the lens holding member comprising a hole configured to guide the cam follower in a radial direction of the cam barrel;
- a tabular elastic member of the lens holding member configured to press the cam follower in a radial direction against the cam of the cam barrel by pressing against a flange unit located at an end of the cam follower;
- and
- a regulating member connected to the tabular elastic member and configured to limit movement of the cam follower in a direction opposite to the radial pressing direction of the tabular elastic member, the regulating member comprising one or more projections configured to be brought into contact with one or more surfaces of the guide portion when the tabular elastic member is pressed in the direction opposite to the radial pressing direction, thereby regulating movement of the tabular elastic member,
- wherein, when the tabular elastic member is not pressed in the direction opposite to the radial pressing direction, a clearance is defined between the one or more projections of the regulating member and the guide portion of the lens holding member.
Dependencies are inferred from the claim text.