Cam mechanism of lens
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorHiroshi Nomura
Life of this patent
Estimating the term…
Abstract
A cam mechanism of a lens including a cam groove having a conical side face, formed in an inner peripheral surface of a cam ring, and a cam follower which is provided on a lens holder for holding a lens group and which is fitted in the cam groove, so that the cam follower can be moved in an optical axis direction by the movement of the cam ring, spring members provided on the lens holder to elastically support the cam follower in the radial direction of the cam ring, and mounting members provided on the spring members to engage with the cam follower in the radial direction.
Claims28
A cam mechanism of a lens having a cam groove having a conical side face, formed in an inner peripheral surface of a cam ring, and a cam follower which is provided on a holder and which is fitted in said cam groove, so that said cam follower can be moved in an optical axis direction by the movement of said cam ring, comprising:
- spring means provided on said holder to elastically support said cam follower in the radial direction of said cam ring;
- and
- mounting means provided on said spring means for engaging with said cam follower in said radial direction;
- wherein said spring means comprises a leaf spring.
A cam mechanism of a lens having a cam groove having a conical side face, formed in an inner peripheral surface of a cam ring, and a cam follower which is provided on a holder and which is fitted in said cam groove, so that said cam follower can be moved in an optical axis direction by the movement of said cam ring, comprising:
- spring means provided on said holder to elastically support said cam follower in the radial direction of said cam ring;
- and
- mounting means provided on said spring means for engaging with said cam follower;
- wherein said spring means comprises a leaf spring.
A cam mechanism of a lens having a cam groove having a conical side face, formed in an inner peripheral surface of a cam ring, and a cam follower which is provided on a holder and which is fitted in said cam groove, so that said cam follower can be moved in an optical axis direction by the movement of said cam ring, comprising:
- spring means provided on said holder to elastically support said cam follower in the radial direction of said cam ring;
- and
- mounting means provided on said spring means for engaging with said cam follower;
- wherein said cam follower comprises a plurality of cam follower pins, each having at its rear end an engaging portion, and said spring means comprises engaging portions which are engaged by the associated engaging portions of said cam follower pins.
Dependencies are inferred from the claim text.