Patent ID: 7636208

Claim:
A lens module, comprising: a barrel having a cylindrical body and an inner annular stepped part formed in the cylindrical body, the inner annular stepped part including a first upward-facing step surface, a second upward-facing step surface and an intermediate side surface interconnected between the first upward-facing step surface and the second upward-facing step surface; and a first lens accommodated in the barrel, the first lens having a central round portion, a peripheral stepped structure surrounding the central round portion, the peripheral stepped structure including a first downward-facing step surface, a second downward-facing step surface, a first lateral surface interconnected between the first downward-facing step surface and the second downward-facing step surface, the first lens being engaged in the inner annular stepped part in a manner that the intermediate side surface of the inner annular stepped part contacts the first lateral surface of the first lens, the first upward-facing step surface of the inner annular stepped part faces toward the first downward-facing step surface of the first lens, and the second upward-facing step surface of the inner annular stepped part faces toward the second downward-facing step surface of the first lens.