Optical fiber connector

An optical fiber connector comprising:

• a head lid having a disc with a central through hole, a terminal portion, which is hollow and extending from a front surface of the disc, and a hemicylindrical piece extending from a rear surface of the disc, said disc having a recess defined in the rear surface thereof, said hemicylindrical piece having a boss formed on an outer wall thereof;
• a connection head having a hollow body and a hollow stepped pillar extending from the body for enclosing and holding an optical fiber, said body having a projection, which is shaped in correspondence with the recess of the head lid so as to be matchingly received in said recess when the stepped pillar extends through the central through hole of the disc and the terminal portion of said head lid;
• an interior tube having a flange formed an outer wall thereof, said interior tube being disposed behind the connection head;
• an exterior tube including a first section having a large inner diameter and a second section having a small inner diameter, and a junction edge being defined on an inner wall of the exterior tube by the different diameters of the first section and the second section, the exterior tube having a hole defined in a wall thereof, the interior tube extending through the exterior tube and the flange of the interior tube being resisted against the junction edge, the head lid engaged with the connection head extending into the exterior tube so that the boss of the head lid is extended into the hole of the exterior tube to be received therein.