A board-to-board connector assembly, comprising:
- a plug connector, including:
- a first printed circuit board, a top surface of the first printed circuit board being defined as a first mounting surface;
- a first insulating housing disposed on the first mounting surface, two opposite ends of the first insulating housing having two first locating grooves penetrating through a top surface and a bottom surface of the first insulating housing, respectively;
- a plurality of first terminals mounted in the first insulating housing;
- and
- two first fastening elements fastened to two opposite ends of the first insulating housing, respectively, each first fastening element having a first main portion, a top end of the first main portion being connected with a first assembling portion, a bottom end of the first main portion being connected with a first soldering foot, the two first assembling portions of the two first fastening elements being inserted into the two first locating grooves;
- and
- a socket connector docked with the plug connector, the socket connector including:
- a second printed circuit board, a top surface of the second printed circuit board being defined as a second mounting surface, a bottom surface of the second printed circuit board being defined as a mating surface, the second mounting surface facing away from the first mounting surface, the mating surface facing the first mounting surface, the second printed circuit board having a penetrating groove penetrating through the second mounting surface and the mating surface;
- a second insulating housing disposed to the second mounting surface, the second insulating housing passing through the penetrating groove and then projecting beyond the mating surface, the second insulating housing being connected with the first insulating housing, two top surfaces of two opposite ends of the second insulating housing being recessed downward to form two concave surfaces, respectively, two outer ends of the two concave surfaces defining two first buckling grooves vertically penetrating through the two opposite ends of the second insulating housing, two inner ends of the two concave surfaces being recessed downward to form two second buckling grooves;
- a plurality of second terminals disposed in the second insulating housing, the plurality of the second terminals being connected with the plurality of the first terminals;
- and
- two second fastening elements fastened in the two concave surfaces of the second insulating housing, respectively, each second fastening element having a second main portion, the two second main portions of the two second fastening elements being disposed on the two concave surfaces, one end of the second main portion being connected with a second assembling portion, the two second assembling portions of the two second fastening elements being disposed in the two second buckling grooves of the second insulating housing, the other end of the second main portion being connected with a second soldering foot, the two second soldering feet passing downward through the two first buckling grooves of the second insulating housing, the two second soldering feet projecting out of two lower portions of the second insulating housing, the two second soldering feet penetrating through the second printed circuit board, and the two second soldering feet projecting beyond the mating surface.