Patent ID: 8814444
Filing Date: 2014-08-26
Classification: G02B

Abstract:
1. An optical connector for a multi-core optical fiber comprising: a connector housing that houses an optical ferrule for a tape shaped optical fiber cord and a coil spring that impresses the optical ferrule in a forward direction; and a spring pressing portion that is attached to a rear end side of the connector housing and receives reaction force of the coil spring, and has an optical fiber inserting through-hole for passing only an optical fiber portion of the optical fiber cord therethrough without passing a coating portion of the optical fiber cord therethrough, and a spring reception portion; wherein the spring pressing portion includes a base portion in which a front end side thereof forms the spring reception portion, a pair of arm portions that extend forwardly from both sides of the optical fiber, and a boot attachment portion that is disposed at a rear side of the base portion so as to attach a boot on an outer circumference thereof; wherein inner portions of the base portion and the boot attachment portion form the optical fiber inserting through hole, and an inner diameter of the optical fiber inserting through hole in a thickness direction of the optical fiber cord is smaller than a thickness of the coating portion of the optical fiber cord; wherein an outer side surface of a front end portion of each of the arm portions and the connector housing are engageable with each other by engaging an engagement claw that is formed on the outer side surface of the front end portion of each of the arm portions with an engagement hole that is formed on the connector housing; wherein the spring pressing portion is composed of two half bodies that are obtained by dividing the base portion and the boot attachment portion at a center portion in a widthwise direction of the optical connector and the optical fiber inserting through-hole and the spring reception portion are formed when the half bodies have been assembled; wherein a pin clamp that holds guide pins that are used for an alignment of an opposite optical ferrule at the time of a face contact between two opposed optical ferrules, is attached to a rear end portion of the optical ferrule; wherein a flat face that faces the forward direction and a protrusion that projects to the forward direction from a center portion of the flat face are formed at the front end portion of each of the arm portions, a thicker portion in which a thickness in the widthwise direction of the connector is relatively thick is formed at the base portion side of each of the arm portions, and the flat face is formed at a front end of the thicker portion; wherein a thinner portion in which a thickness in the widthwise direction of the connector is relatively thin is formed at an outer side in the widthwise direction of the connector of the protrusion of each of the arm portions, and the engagement claw is formed on an outer side surface of the thinner portion; and wherein both of the protrusions of the arm portions are configured to prevent an excessive retreat of the optical ferrule by attaching the protrusions to a rear end of the pin clamp when the optical ferrule is excessively pressed by the opposite optical ferrule at the time of the face contact between two opposed optical ferrules.