Patent ID: 8596883

Claim:
An optical connector plug of a push-on coupling system, comprising: a plug frame that holds a ferrule having at least one optical fiber extending in an axial direction; and a housing that holds the plug frame therein, wherein the housing includes a grip member and a shutter holding member that move relatively in an axial direction, the shutter holding member includes a shutter member that has a front end positioned at the front side of the axial direction and a base end positioned at the rear side of the axial direction and held in the shutter holding member, the plug frame moves relatively in the axial direction with respect to the shutter holding member while cooperating with the grip member in a state in which a predetermined movement amount in the axial direction is allowed, having an extension state in which the grip member moves to the rear side of the axial direction of the shutter holding member and a reduction state in which the grip member moves to the front side of the axial direction of the shutter holding member, the housing has a shape to be coupled to the optical connector adaptor in the reduction state, and a coupling recess portion that is provided on the outer circumference of the front end side of the plug frame to be coupled to a coupling claw of the optical connector adaptor, characterized in that, a biasing member that biases the shutter holding member to the front side of the axial direction with respect to the plug frame is disposed in the housing and a biasing member receiving member that is connected to the plug frame is disposed on the rear side of the axial direction of the biasing member, and in an optical non-coupling state of the optical connector plug, the extension state in which the grip member is moved to the rear side of the axial direction of the shutter holding member by the biasing member is maintained.