Patent ID: 8342698
Filing Date: 2013-01-01
Classification: G03B

Abstract:
1. A focusing device for a beam projector, comprising: an adjustment member mounted on a housing of the beam projector to be linearly movable on the housing; a pivoting member rotatably mounted on the housing; a link member extending from the pivoting member at a point separated from a rotation axis of the pivoting member; and a lens assembly mounted to be linearly movable within the housing while interfering with the pivoting member, wherein the link member rotates the pivoting member according to the linear movement of the adjustment member and the lens assembly linearly moves within the housing according to the rotation of the pivoting member, wherein the adjustment member comprises a driving slot extending while being inclined with respect to a movement direction of the adjustment member and the link member comprises a driving protrusion received in the driving slot to be linearly movable, and the driving protrusion is linearly movable in the driving slot according to the linear movement of the adjustment member to rotate the pivoting member.