| 摘要 |
A lens barrel includes a first frame member supporting a first lens group, a second frame member supporting a second lens group and being capable of movable relative to the first frame member along an optical axis, a cam follower in the first frame member, a cam frame member having a cam groove engaged with the cam follower to permit the first frame member to be movable along the optical axis, a contact portion which is provided for the second frame member and can come into contact with the cam follower, and a pushing member pushing the second frame member in the direction the cam follower comes into contact with the contact portion. The pushing member pushes the second frame member and the contact portion comes into contact with the cam follower. Thus, the position of the second lens group with respect to the first lens group can be restricted.
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