Patent ID: 7342606
Filing Date: 2008-03-11
Classification: G02B

Abstract:
1. A zoom lens system comprising: a zoom base designed to be coupled to an electronic facility; a driving source for generating rotational force in accordance with a control signal of the electronic facility; plural power transmission gears disposed on the zoom base to reduce the rotational force of the driving source; a first lens cam disposed on the zoom base and rotated by the rotational force of the power transmission gears; plural first lens shafts coupled on the zoom base in a direction of an optical axis and located in the first lens cam; a first lens barrel having a first lens, the first lens barrel being disposed in the first lens cam and slidably coupled to the first lens shafts in the direction of the optical axis to move in the direction of the optical axis in accordance with rotation of the first lens cam; a power transmission member coupled to the first lens cam, the power transmission member extending in the direction of the optical axis and rotating by rotation of the first lens cam; an outer second lens cam disposed on an outer circumference of the first lens cam and fixed on the zoom base; an inner second lens cam disposed in the outer second lens cam and coupled to the power transmission member, the inner second lens cam rotating by rotation of the power transmission member, the inner second lens cam in cam engagement with the outer second lens cam and moveable in the direction of the optical axis while rotating; plural second lens shafts coupled to the zoom base in the direction of the optical axis and located in the inner second lens cam; and a second lens barrel having a second lens, the second lens barrel being disposed in the inner second lens cam and slidably coupled to the second lens shafts to linearly move in the direction of the optical axis in accordance with rotation of the inner second lens cam.