Abstract: An electrical connector includes: a plastic seat; a tongue; and two rows of terminals; characterized in that a front section of the tongue is a thinner plate body, top and bottom surfaces of the thinner plate body are two front-section surfaces, a rear section of the tongue is a thicker plate body, top and bottom surfaces of the thicker plate body are two rear-section surfaces, the rear-section surface of one of the top and bottom surfaces of the tongue projects more than the entire front-section surface of the corresponding one of the top and bottom surfaces of the tongue by a height so that a step is formed between the rear-section and front-section surfaces of each of the top and bottom surfaces of the tongue. A combination of the bidirectional duplex electrical connector and a docking electrical connector is also provided.

Abstract: A socket structure includes a base; a slot, disposed on one end of the base and to be connected to one plug having one row of terminals; a tongue disposed on a front end of the base and within the slot so that chambers of the slot on two sides of the tongue may be normally and oppositely inserted and positioned into the slot; one row of first contacts separately arranged on one surface of the tongue, wherein each first contact is electrically connected to a first pin extending out of the base; and one row of second contacts separately arranged on the other surface of the tongue. Each second contact is electrically connected to a second pin extending out of the base. When the plug is inserted into the slot, the row of terminals of the plug are electrically connected to the row of first or second contacts.