Patent ID: 7391579

Claim:
A miniature zoom lens, comprising: a hollow front housing; a hollow rear housing connected to the front housing to form a receiving space between the front housing and the rear housing; a first lens assembly having a first lens unit mounted on the front housing; a second lens assembly having a first supporting base, a second lens unit, and at least one first permanent magnet; a third lens assembly having a second supporting base, a third lens unit, and at least one second permanent magnet, wherein at least one of the second lens assembly and the third lens assembly is received in the receiving space; a guiding module having a plurality of positioning members made of magnetically conductive material positioned on a plurality of predetermined positions in the front housing and the rear housing; and at least one driving coil having a first coil mounted on an inner peripheral surface of the front housing and corresponding to the first permanent magnet, and a second coil mounted on an inner peripheral surface of the rear housing and corresponding to the second permanent magnet; wherein when the first coil and the second coil are powered by a predetermined current, the first coil and the second coil generate an electromagnetic force interacting with the first permanent magnet and the second permanent magnet to move the second lens assembly and the third lens assembly; and when the first coil and the second coil are not powered, the positioning members attract with the first permanent magnet and the second permanent magnet to position the second lens assembly and the third lens assembly on the predetermined positions in the front housing and the rear housing.