Patent ID: 7545590

Claim:
An optical lens module comprising: a lens barrel comprising an external wall; and a barrel base having a receiving housing, the receiving housing being configured for receiving the lens barrel therein, the receiving housing defining an internal wall therein; wherein the lens barrel defines at least a first positioning block or at least a second positioning slot at the external wall parallel to a longitudinal axis of the lens barrel, the receiving housing defines at least a first positioning slot corresponding to the first positioning block or at least a second positioning block corresponding to the second positioning slot at the internal wall of the receiving housing, the lens barrel comprises a first end surface and a second end surface at opposite ends thereof, the first positioning block or the second positioning slot communicating with the first end surface and the second end surface, and the first positioning block or the second positioning block is a prism and a cross sectional profile of the first positioning slot or the second positioning slot is a polygon, the prism and the polygon matching in shape in order to thereby facilitate a slide fit of the first positioning block in the first positioning slot or of the second positioning block in the second positioning slot of the receiving housing for respectively cooperating to mount the lens barrel in the receiving housing.