Latched connector assembly

A latched connector assembly comprising a first connecting device and a second connecting device, characterized in:

• the first connecting device having a first casing and at least two terminal connectors received in the first casing, the first casing having a first opening, a second opening, a first receiving space in communication with the first opening and the second opening, a pair of first side walls, and a pair of second side walls perpendicular to the first side walls;
• the first side walls each having a window and at least a first engaging structure protruding outward, the first engaging structure having an extending portion and an engaging portion, the extending portion being connected to the corresponding first side wall via a bending portion disposed therebetween, the engaging portion having a first end located proximate to the extending portion and provided with a first shoulder portion and a second end located distal to the first shoulder portion and provided with a fastening portion, the window having a second shoulder portion corresponding in position to the first shoulder portion so as to allow the first shoulder portion and the second shoulder portion to abut against each other;
• the second side walls each having an extending arm extending toward the second connecting device, the extending arms each having a front end with a second engaging structure, the first engaging structures penetrating the windows, respectively, to hold firmly the terminal connectors in the first casing;
• the second connecting device having a second casing and at least two terminal connectors received in the second casing, the second casing having a third opening, a fourth opening, a second receiving space in communication with the third opening and the fourth opening, a pair of third side walls, and a pair of fourth side walls perpendicular to the third side walls;
• and
• the third opening facing the first opening of the first connecting device, the third side walls each having a window and at least a first engaging structure protruding outward, the fourth side walls each having at least a locking portion protruding outward for receiving the second engaging structures of the first connecting device, the first engaging structures penetrating the windows, respectively, to hold firmly the terminal connectors in the second casing;
• wherein the first side walls and the third side walls each have a protruding portion extending outward so as to allow the fastening portion to abut against the protruding portion, and the terminal connectors are received, in upside down opposite directions, in the first casing and the second casing, respectively.