US Patent 7819593 Lens module and camera having same

A lens module includes a lens, a lens module and a base. The lens barrel receives the lens therein. The lens barrel includes a hollow cylindrical body, a beveled distal end and a flange. The hollow cylindrical body includes a smooth peripheral side surface free of thread formed thereon. The flange extends outwardly from the cylindrical body. The flange defines an annular groove in a peripheral surface thereof. The base includes a hollow cylindrical holding body coaxially receiving the cylindrical body therein. The holding body has a first distal end, a second distal end and an inner smooth surface. The beveled distal end is configured for facilitating insertion of the cylindrical body in the cylindrical holding body. The flange is configured for being clamped by a tool and being moved toward or away from the base using the tool.