Patent ID: 8369025
Filing Date: 2013-02-05
Classification: G02B,G03B

Abstract:
1. A lens barrel comprising: a linear guiding member having a first linear movement groove, a second linear movement groove and a groove, each of which extending in an optical axis direction of the lens barrel; a cam barrel having a cam groove, said cam barrel moving in the optical direction while rotating; and a linear movement unit having a lens therein, said linear movement unit being movable in the optical direction relative to said linear guiding member, and having a cam pin engaging with the cam groove, a first linear movement key engaging with the first linear movement groove, a second linear movement key engaging with the second linear movement groove, and a projection engaging with the groove, wherein in a movement region of said linear movement unit moving in the optical direction relative to said linear guiding member, each of a set of the first linear movement groove and the first linear movement key and a set of the second linear movement groove and the second linear movement key has a mutually engageable region and a mutually disengageable region, and a set of the groove and the projection has not a mutually engageable region.