Abstract: A barrel assembly of a zoom camera includes a front lens frame where a front lens group is installed, a front guide frame for supporting the front lens frame, a zoom ring advancing and retreating along an optical axis of the front lens group, an inner helicoid ring installed to be capable of advancing and retreating with respect to the zoom ring, a rear lens frame where a rear lens group which is arranged on the same optical axis as the front lens group is installed, and a cam unit formed at the zoom ring and an inner rotator which is installed at the inner helicoid ring to be capable of advancing and retreating, for adjusting the interval between the front lens group and the rear lens group as the front lens group moves.

Abstract: A barrel assembly of a zoom camera includes a zoom ring at which a front lens group is installed and which is moved back and forth along the optical axis, a rear lens group frame at which a rear lens group is installed along the same optical axis as the front lens group and which is coupled to the zoom ring, and a cam means for correcting the optical position of the rear lens group with respect to the front lens group during operation of zoom.

Abstract: A zoom lens barrel structure of a zoom camera includes a fixed barrel fixed to the camera, a double helicoid ring having first and second helicoid portions having different lead angles, a front lens group support body coupled to the first helicoid portion of the double helicoid ring, a rear lens group support body coupled to the second helicoid portion of the double helicoid ring, and guide means for guiding the front lens group support body and the rear lens group support body to move along the optical axis of the camera, the guide means having a cam portion formed along a path where the rear lens group support body is coupled to the second helicoid portion.

Abstract: A barrel assembly of a zoom camera includes a front lens frame where a front lens group is installed, a front guide frame for supporting the front lens frame, a zoom ring advancing and retreating along an optical axis of the front lens group, an inner helicoid ring installed to be capable of advancing and retreating with respect to the zoom ring, a rear lens frame where a rear lens group which is arranged on the same optical axis as the front lens group is installed, and a cam unit formed at the zoom ring and an inner rotator which is installed at the inner helicoid ring to be capable of advancing and retreating, for adjusting the interval between the front lens group and the rear lens group as the front lens group moves.

Abstract: A zoom lens barrel driving system for a camera includes a driving source, a magnification controlling unit, and a focus controlling unit. The magnification controlling unit is formed with a plurality of barrels and a plurality of lens groups. The barrels and the lens groups move in an optical axis direction upon receipt of a driving power from the driving source such that magnification continuously varies. The focus controlling unit is formed by the lens groups. The lens groups repeatedly move between a near focal position and an infinite focal position in the optical axis direction in synchronization with variation in the magnification to perform a focus controlling operation.