Patent ID: 7826157

Claim:
A lens module comprising: an upper coupling element having multiple engaging posts axially and extended downwardly from edges thereof; a spring disposed under said upper coupling element, and comprising a lower inner rim, an upper outer rim and an elastic serpentine structure between said lower inner rim and said upper outer rim; a magnet yoke disposed under said spring and having a cylindrical inner wall, multiple extension slices and a top wall, wherein said top wall is outwardly extended from an upper edge of said cylindrical inner wall, said extension slices are downwardly and axially extended from a periphery of said top wall and circumferentially arranged on said top wall at regular intervals, and the axial height of said cylindrical inner wall is smaller than that of each extension slice; a plurality of magnets attached on inner surfaces of respective extension slices of said magnet yoke, wherein said plurality of magnets and said inner surfaces of respective extension slices are flat; a coil; a lens holder sheathed by said cylindrical inner wall, wherein said lens holder has a first engaging means formed on an inner surface thereof for fixing a lens, at least one flange is circumferentially and outwardly extended from a lower periphery of said lens holder for supporting said coil, and a second engaging means are circumferentially arranged on said lower periphery of said lens holder; and a lower coupling element comprising multiple engaging grooves mating with said engaging posts and a third engaging means mating with said second engaging means, so that said upper coupling element, said spring, said magnet yoke with said attached magnets, said lens holder with said supported coil and said lower coupling element are combined together to assemble said lens module via the engagement between said engaging grooves and said engaging posts and the engagement between the said engaging means and said second engaging means.