Abstract: A focusing device (100) includes a lens mount (10), a driving mechanism (30), a hollow first barrel (50) and a first lens element (60) received in the first barrel. The lens mount includes a hollow sleeve (13) which includes a wall, a first internal thread on an inside of the wall and a cutout (134) defined through the wall. The hollow first barrel includes a wall, and a first outer thread (571) and an annular gear (55) on an outside of the wall. The first barrel is movably secured in the lens mount by means of the first outer thread engaging with the first internal thread, the driving mechanism protrudes through the cutout of the lens mount to drive the annular gear to rotate in the lens mount so that the first barrel ascends or descends relative to the lens mount.

Abstract: A focusing device (100) includes a lens mount (10), a driving mechanism (30), a hollow first barrel (50) and a first lens element (60) received in the first barrel. The lens mount includes a hollow sleeve (13) which includes a wall, a first internal thread on an inside of the wall and a cutout (134) defined through the wall. The hollow first barrel includes a wall, and a first outer thread (571) and an annular gear (55) on an outside of the wall. The first barrel is movably secured in the lens mount by means of the first outer thread engaging with the first internal thread, the driving mechanism protrudes through the cutout of the lens mount to drive the annular gear to rotate in the lens mount so that the first barrel ascends or descends relative to the lens mount.

Abstract: A lens module includes a holder and a barrel. The barrel has at least one lens received therein. At least one given lens is integrated with the barrel and the holder. A method for making a lens module includes the steps of: providing a die assembly having a molding cavity configured for forming an integrated structure including a lens, a barrel, and a holder; placing a moldable material capable of being molded as the integrated structure into the molding cavity; and forming the moldable material into the integrated structure.