Patent ID: 7828604

Claim:
A connector assembly, comprising a plug connector having a base body and at least one inserting portion extended from a front of the base body, the inserting portion having a substantially circular plug groove of which an inner wall has a portion formed with an anti-mismating portion of plane shape, the anti-mismating portion having a null terminal recess for receiving a null terminal; and a socket connector coupled with the plug connector, comprising: an insulating housing having at least one receiving groove at a front surface thereof and a substantially circular receiving portion surrounded by the receiving groove, the receiving portion having a portion formed with an anti-mismating face of plane shape, corresponding to the anti-mismating portion, with a null pin recess formed thereon, a rear surface of the insulating housing having at least one fixing slot adjacent to the receiving groove, two wing slots being adjacent to the receiving groove extending away from each other from two opposite sides of the at least one fixing slot, each of the wing slots passing through the whole insulating housing and communicates with the receiving groove, at least one fixing element having a fixing slice being located in the fixing slot, and two wing slices symmetrically depending from two opposite sides of the fixing slice, with an obtuse angle formed therebetween, the wing slice being received in the corresponding wing slot having a resisting arm biased from a plane of the wing slice and projecting into the receiving groove for abutting the inserted plug connector; and a null pin received in the null pin recess having a resisting portion projecting outside the anti-mismating face for electrically connecting with the null terminal of the plug connector when the plug connector is inserted into the socket connector.