| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens barrel reducing defocus blurs. <P>SOLUTION: The lens barrel includes: a cylindrical cam 2 having cam grooves 3a and 3b and a straight cam groove 4 connected to the cam grooves 3a and 3b on its outer periphery and configured so as to be rotatable; zoom lens groups 7a and 7b having cam followers 8a and 8b, respectively, which is engaged with the cam grooves 3a and 3b and slides along the cam grooves 3a and 3b when the cylindrical cam 2 is rotated, and configured so as to be movable in an optical axis direction; charge rubber 51 fitted to the straight cam groove 4 and pressing and fixing the cam followers 8a and 8b to the inner surface of the straight cam groove 4 in the straight cam groove 4 to regulate the rotation of the cylindrical cam 2; and a roller base 50 and a fixing bolt 52a for varying and fixing a fitting position of one of a plurality of the cam followers 8a and 8b on a plane defined by regarding a rotation axis as a normal. The straight cam groove 4 is extended in parallel with the optical axis direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
