| 摘要 |
The present invention relates to a focusing device for a micro projector mounted on a small device such as a portable terminal, and more specifically, to a focusing device which adjusts a focus of a projector by moving a barrel of a projection lens back and forth in an optical axis direction in a projector body. The focusing device comprises: a control cam which is disposed adjacent to the barrel, is rotatably installed in the body, and includes a ring-shaped rail groove which has an eccentric center from a rotational shaft; and a movable member which extends from the outside of the barrel, includes a coupling protrusion to interlock with the rail groove of the control cam at one end, and moves the barrel while moving in a direction parallel to the optical axis direction by a rotational motion of the control cam. Therefore, a fine focus adjustment can be achieved by providing a structure that can precisely adjust a movement distance of the barrel. |
