Patent ID: 8444429

Claim:
An unlocking jig for releasing engagement between through holes of a receptacle connector and protruding portions of a plug connector to thereby release the receptacle connector and the plug connector inserted in the receptacle connector from a state locked to each other, the unlocking jig comprising: a jig main body that is mountable to and removable from the receptacle connector in a direction perpendicular to a direction of fitting and removing the plug connector and the receptacle connector to and from each other; and pressing portions that are provided on said jig main body, for pressing, when said jig main body is mounted to the receptacle connector, the protruding portions against urging forces of spring portions of the plug connector, which urge the protruding portions toward the through holes, to thereby release engagement between the protruding portions and the through holes, wherein said jig main body has a hollow semi-cylindrical shape, and wherein said pressing portions are a pair of protrusions which are arranged on an inner peripheral surface of a first end of said jig main body in a manner opposed to each other in a radial direction of said jig main body, and are guided by respective guide grooves formed in an outer peripheral surface of the receptacle connector such that the guide grooves extend across the respective through holes in the direction perpendicular to the fitting and removing direction.