Patent ID: 7199944

Claim:
A lens driving apparatus, comprising: a movable first lens group, having a first lens; a second lens group, having a second lens; at least two guide rods, passing through said first lens group and said second lens group to let said first lens group and said second lens group move relative to each other along said guide rods; a guide pin, formed on said second lens group; a follower, having a leading pin disposed thereon, and a guide slot formed therein, said guide pin penetrating the guide slot; and a leading member, having a first end fixed to said first lens group, and having a second end that has a leading cam, the leading cam engaging with said leading pin of said follower; wherein when said first lens group moves along said guide rods, said leading member and said leading cam are caused to move in a linear direction, causing said leading cam of said leading member to moves said leading pin of said follower, and thereby causing said follower to move said guide pin, thereby moving said second lens group along said guide rods, with a relative distance between said first lens group and said second lens group changing according to said leading cam.