Structure of electrical connector

An electrical connector, comprising:

• an electrically insulative housing, said electrically insulative housing comprising a rear accommodation space defined in a rear side thereof, a front receiving unit disposed at a front side thereof for receiving a matching electrical connector, a plurality of terminal slots formed in said front receiving unit and backwardly extending to said rear accommodation space, and a plurality of recessed locating portions symmetrically disposed at two opposite lateral sides thereof;
• a circuit board mounted in the rear accommodation space of said electrically insulative housing, said circuit board comprising a plurality of signal terminals forwardly extending from a front side thereof and respectively inserted into said terminal slots of said electrically insulative housing and suspending in said front receiving unit of said electrically insulative housing, and a plurality of signal metal contacts and grounding metal contacts disposed at a back side thereof, said signal metal contacts being respectively electrically connected with said signal terminals;
• an adapter module fastened to a rear bottom side of said circuit board, said adapter module comprising a plurality of input terminals respectively embedded therein at predetermined locations, said input terminals each having a front connection portion extending out of a top wall of said adapter module and respectively electrically connected to the metal contacts of said circuit board and a rear bonding portion downwardly extending out of a bottom wall of said adapter module for bonding to a predetermined external circuit board;
• a plurality of grounding spring plates respectively mounted in the recessed locating portions of said electrically insulative housing, each said grounding spring plate comprising a base, at least one bonding portion backwardly extending from said base and electrically connected to one metal contact of said circuit board for grounding and a spring arm forwardly extending from a front side of said base;
• and
• a metal shield surrounding said electrically insulative housing and said adapter module and said grounding spring plates and kept in contact with said grounding spring plates for grounding.