FERRULE OF OPTICAL FIBER CONNECTOR

PURPOSE:To adjust the shrinkage strain on cooling at the time of molding with a mere modification of rib parts by providing the ribs extending in a longitudinal direction in the positions equally dividing the circumference of a cylindrical part to at least three parts from the end face of the root part of the ferrule toward the outside surface of a narrow part and the cylindrical part. CONSTITUTION:The ribs 16 extending in the longitudinal direction are provided in the positions equally dividing the circumference of the cylindrical part 13 to at least three parts. The rib 16-1 is formed thinner than a through-hole 11 and the rib 16-2 existing in the position symmetrical with the rib 16-1 is formed thicker than the hole if the ferrule having the above-mentioned through-hole inclined toward the rib 16-1 is assumed to be produced. The force of the shrinkage strain by cooling is larger in the rib 16-2 part than in the rib 16-1 part if such ferrule is cooled after the heating and forming. The cylindrical part 13 is, therefore, pulled toward the rib 16-2 and the inclination of the through-hole 11 is eventually corrected. The narrow part 14 is provided in order to allow the correction of the inclination of the cylindrical part 13 continuous therewith with small force. The shrinkage strain on cooling is controlled in this way.