DEVICE FOR CONROLLING LENS FOCUS DISTANCE

摘要

The present invention relates to a device to control a lens focus distance with an improved point image support structure, wherein a carrier accommodated in a base controls a focal distance of a mounted lens by performing a moving motion, and a stopping motion using a magnetic coupling force and a metallic magnetic coupling force. More specifically, the improved point image support structure is formed between an inner wall of a base and an outer wall of the carrier facing each other such that resistance between the carrier and the base is reduced without increasing a weight of a carrier as an improved point image support structure is formed. An outer wall rail is formed on an outer wall of the carrier on which a driving unit is arranged, and a guide insert inserted into an inner wall of the base facing the outer wall rail. The guide insert comprises: the base and a plate separately formed from the carrier, and one or more point image support units formed on one side of the plate facing the outer wall rail of the carrier.