Miniaturized electrical connector with features to prevent short circuit of power terminals

1 . A pair of electrical connectors comprising a plug connector and a receptacle connector,

wherein the plug connector comprises:

(a) a plug housing comprising a plug base and a wall protruding upwards from the plug base;

(b) a plug signal terminal disposed on the wall;

(c) a plug power terminal disposed on the wall;

(d) a fastening wall formed on the wall between the plug signal terminal and the plug power terminal;

(e) a connection wall between the fastening wall and the wall of the plug connector, the connection wall being smaller in height and width than the wall of the plug connector; and

(f) a through-hole formed through the plug housing at both sides of the connection wall;

the receptacle connector comprises;

(g) a receptacle housing comprising a receptacle base, a first wall protruding from an upper surface of the receptacle base, a second wall protruding from the upper surface of the receptacle base and crossing the first wall, a third wall protruding from the upper surface of the receptacle base, crossing the second wall, and facing the first wall, and a fourth wall protruding from the upper surface of the receptacle base, crossing the first and third walls, and facing the second wall;

(h) a receptacle signal terminal disposed at least on the second wall;

(i) a receptacle power terminal disposed at least on the first wall; and

(j) a fastening groove formed between the second wall and the fourth wall, and

the fastening wall is placed on the fastening groove with the plug connector completely fitted into the receptacle connector.

2 . The pair of electrical connectors according to claim 1 , wherein the fastening wall is formed on the wall of the plug connector and has a greater width than the wall.

3 . The pair of electrical connectors according to claim 1 , wherein the receptacle connector further comprises: an inner protruding wall between the second wall and the fourth wall, the inner protruding wall protruding upwards from the receptacle base and extending toward inner surfaces of the second wall and the fourth wall in a transverse direction of the receptacle connector.

4 . The pair of electrical connectors according to claim 3 , wherein the inner protruding wall is formed at an upper portion thereof with an upward protrusion extending higher than the wall of the receptacle housing.

5 . The pair of electrical connectors according to claim 4 , wherein the upward protrusion is placed in the through-hole with the plug connector completely fitted into the receptacle connector.

6 . The pair of electrical connectors according to claim 3 , wherein a space above the inner protruding wall forms an open hole and the connection wall is placed in the open hole with the plug connector completely fitted into the receptacle connector.