Patent ID: 7618297

Claim:
An electrical connector for permitting insertion of a full sized plug and for preventing insertion of a smaller sized plug, comprising: an insulative housing defining a receiving cavity through a front face thereof and a plurality of receiving grooves extending in a mating direction of the plug at one inner side of the receiving cavity; and a plurality of terminals, each terminal defining a fixing portion received and retained in the receiving groove, an elastic contacting portion extending into the receiving cavity from a front end of the fixing portion and a soldering portion extending from a rear end of the fixing portion; wherein the electrical connector defines at least one protrusion discrete with the terminal for blocking a side portion of the smaller sized plug, and the at least one protrusion aligns with one contacting portion of the outermost terminal; wherein the least one protrusion is positioned in front of the receiving groove for receiving the outermost terminal therein, and the at least one protrusion extends upward without any portion disposed above the receiving groove and the corresponding contacting portion; wherein the at least one protrusion is integrally extending upwards from an inner side of the housing; wherein the at least one protrusion defines a guiding face slanting to the receiving cavity and a supporting face connecting with the guiding face and in front of the receiving groove; wherein the terminal defines a lying U-shaped structure behind the corresponding protrusion; and wherein said terminal further includes a straight contact section extending from said U-shaped structure in an oblique direction, and a joint of said straight contact section and said U shaped structure is lower than said protrusion.