Patent ID: 7384274

Claim:
A board to board connector, comprising: a receptacle having a first housing, a plurality first terminals received in the first housing, and a pair of first locking pieces, the first housing having two first side walls and two second side walls, the top surface of the second side wall defines a groove, the groove extending to the two first side walls and then extending towards the middle of the first side walls to show a U-shape, the bottom of the groove defining at least two first receiving holes penetrating downward through the first side walls respectively and at least one second receiving hole penetrating downward through the second side wall, the first locking piece having a U-shape body received in the groove, the two ends and the middle of the body extending downward to form welding portions respectively, the welding portions inserted into the first receiving holes and the second receiving hole, the bottom of the welding portions projecting out of the first housing; and a plug inserted into the receptacle, the plug having a second housing, a plurality of second terminals received in the second housing and a pair of second locking pieces, the second housing having two first wallboards and two second wallboards, an inserting groove opened in the bottom surface of the second wallboard, the fundus of the inserting groove defining at least one inserting hole through the second wallboard, the second locking piece having a horizontal arm and at least one straight arm vertically extending from the horizontal arm, the second locking piece inserted into the inserting groove, the straight arm arranged in the inserting hole, and the top of the straight arm projecting out of the second housing.