| US 7,595,945 B2 | ||
| Lens apparatus and image-taking apparatus | ||
| Ryuichi Nagae, Yokohama (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Sep. 28, 2005, as Appl. No. 11/236,972. | ||
| Claims priority of application No. 2004-282194 (JP), filed on Sep. 28, 2004. | ||
| Prior Publication US 2006/0066960 A1, Mar. 30, 2006 | ||
| Int. Cl. G02B 7/02 (2006.01); G02B 15/14 (2006.01) | ||
| U.S. Cl. 359—823 [359/822; 359/699; 359/700] | 9 Claims |
| 1. A lens apparatus comprising:
a first member having a cam groove portion on its cylindrical surface; and
a second member holding a cam follower member which has an engagement portion engaging with the cam groove portion, the first
and second members moving relatively in an optical axis direction,
wherein the cam follower member has a peripheral portion which projects from the second member at a position facing the cylindrical
surface,
in a state in which the engagement portion is engaged with the cam groove portion and in a direction orthogonal to the optical
axis direction, the interval between the cylindrical surface and the peripheral portion is smaller than that between the bottom
surface of the cam groove portion and the end surface, which faces the bottom surface, of the engagement portion, and
the peripheral portion is contactable to the cylindrical surface when one of the first and second members displaces with respect
to the other in the direction orthogonal to the optical axis direction.
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