ZOOM LENS BARREL FOR PREVENTING BREAKDOWN CAUSED BY SEPARATION OF ZOOM LENS GROUP

摘要

PURPOSE: A zoom lens barrel is provided to form an efficient zoom lens system by installing an auto focus lens group within a guide member and preventing breakdown caused by separation of a zoom lens group. CONSTITUTION: An optic system is formed with at least two or more lens groups. A focal distance of the optic system is changed by changing an interval between the lens groups. The first rotary member(20) is rotated by power of a drive source. The second zoom lens group(30) is coupled to the first rotary member. A guide member is used for guiding the first rotary member. The second rotary member(50) is coupled to the first rotary member. The first zoom lens group(60) is coupled to the second rotary member. An elastic member(70) is installed between the first and second rotary members. An auto focus lens group(80) is used for controlling a focal position.