US Patent 7489455 Lens barrel

The present invention provides a lens barrel comprising: a lens barrel body; an extender including a rotary shaft which is parallel to the optical axis of the lens barrel body and shifted to the side of one side of the lens barrel body and a rotational member on which at least one lens is arranged, the extender arranging the lens on the optical axis of the lens barrel body according to a position where the rotational member stops rotating; a cover unit provided at the rear end of the lens barrel body and forming an extender covering space extending from the rear end of the lens barrel body toward one side and the top face of the lens barrel body and having a thickness in the direction of the optical axis of the lens barrel body; a small diameter unit provided on the cover unit; a mount unit provided at the rear end of the small diameter unit and on which is detachably mounted a camera device; and a flange back adjusting lever provided on the small diameter unit and located in a comparatively wide space formed between the camera device mounted on the mount unit and the lens barrel body.