Abstract: A camera module includes: a first body including a substrate; an image sensor mounted on the substrate; a second body including a lens module; a ball bearing disposed between the first body and the second body to enable movement of the second body relative to the first body; and a driving member disposed between the first body and the second body to provide driving force to move the second body in at least one direction intersecting an optical axis.

Abstract: A switch apparatus, includes: a base module including a base case, and a moving magnet movably mounted in the base case; and a manipulation module including a manipulation case, and a first magnet fixedly mounted in the manipulation case, wherein the moving magnet moves between a hold position and a releasable position, the hold position refers to a position in which the manipulation module is held onto the base module as an attractive force acts between the moving magnet and the first magnet, and the releasable position refers to a position in which the manipulation module is releasable from the base module as a repulsive force acts between the moving magnet and the first magnet.

Abstract: A zoom optical system according to an embodiment of the present invention comprises a first lens group, a second lens group and a third lens group sequentially aligned from an object toward an image, wherein the second lens group and third lens group can move, and an effective focal length (EFL) at a wide angle is defined by the mathematical formula below. 2 . 9 < E ? F ? L wide H imageD < 3 . 5 Here, EFLwide means an effective focal length of the zoom optical system at a wide angle, and HimageD means a half of the diagonal length of an image sensor pixel area.