| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens barrel including a lens barrel easing the inclination of a cam groove. <P>SOLUTION: The lens barrel is provided with: a first lens barrel 13 making a rotational movement; a second lens barrel including a straight advance barrel which is moved to advance straightly integrally, and a first cam pin engaging with a drive groove 13c of the first lens barrel 13 by going though the first cam groove provided on the straight advance barrel and making a rotational movement by rotation of the first lens barrel 13; and a third lens barrel including a second cam pin engaging with a second cam groove 13d provided on the first lens barrel 13 and making a rotational movement by rotation of the first lens barrel 13. In this case the drive groove 13c is formed from a first drive groove 13c1, a second drive groove 13c2 and a third drive groove 13c3 connecting an end section of the first drive groove 13c1 and an end section of the second drive groove 13c2, and one end 13d1 of one of the cam grooves, the second cam groove 13d, is disposed in the vicinity of the first drive groove 13c1 by going through an imaging surface side of the third drive groove 13c3 and the other end 13d2 of the other cam groove, the second cam groove 13d, is disposed in the vicinity of the second drive groove 13c2 by going though the subject side of the third drive groove 13c3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
