Electrical connector having an improved insulative base

1. An electrical connector comprising:

an insulative housing defining a receiving room and a tongue portion in the receiving room;

a first contact module being received in the insulative housing and comprising a first insulative base and a plurality of first conductive terminals insert molded in the first insulative base, each first conductive terminal including a first embedded portion having an exposed upper surface, a first connecting portion completely embedded in the first insulative base, and a first bent portion bent downwardly from the first connecting portion;

a second contact module integrated under the first contact module, the second contact module being received in the insulative housing and comprising a second insulative base and a plurality of second conductive terminals insert molded in the second insulative base, each second conductive terminal including a second embedded portion having an exposed lower surface, a second connecting portion completely embedded in the second insulative base and a second bent portion bent downwardly from the second connecting portion;

wherein the tongue portion defines a recess at a front end thereof and a first through hole, the recess engaging with a forehead of the first and second contact modules, the first through hole receiving the first and second contact modules while exposing the exposed upper surface of the first embedded portion and the exposed lower surface of the second embedded portion.

2. The electrical connector as claimed in claim 1 , further including a shielding shell enclosing the insulative housing and having a plurality of elastic pieces.

3. The electrical connector as claimed in claim 1 , wherein:

the insulative housing includes a stepped groove having a pair of first leading grooves and a pair of second leading grooves, each first leading groove having a convex portion, each second leading groove having a protruding portion;

the first contact module includes a pair of first guiding arms, each first guiding arm having a first tuber mated with the convex portion of the each first leading groove; and

the second contact module includes a pair of second guiding arms, each second guiding arm having a second tuber mated with the protruding portion of each second leading groove.

4. The electrical connector as claimed in claim 3 , further including a fixing portion mounted below the second contact module, the fixing portion defining a plurality of holes receiving the bent portions of the first and second contact modules.

5. The electrical connector as claimed in claim 4 , wherein the fixing portion comprises a base body and a stretching portion, two sides of the base body including a pair of bulging portions received in the second leading grooves.

6. The electrical connector as claimed in claim 1 , wherein the insulative housing includes a plurality of second through holes engaging with the elastic pieces.

7. An electrical connector comprising:

an insulative housing forming a receiving room communicating forwardly with an exterior along a front-to-back direction with a tongue portion unitarily formed therein;

a through cavity formed within the tongue portion so as to result in a frame configuration of said tongue portion;

a first terminal module including a plurality of first terminals embedded within and retained by a first insulative base, each of said first terminals including a first front mating section supported by the first insulative base and exposed to said exterior in a vertical direction perpendicular to said front-to-back direction;

a second terminal module including a plurality of second terminals embedded within and retained by a second insulative base, each of said second terminals including a second front mating section supported by the second insulative base and exposed to the exterior in another vertical direction opposite to said vertical direction; wherein

the first terminal module and the second terminal module are back to back stacked with each other in said vertical direction and forwardly assembled into the housing along said front-to-back direction, and front portions of said first insulative base and said second insulative base are commonly received within the through cavity and surrounded by said frame configuration and exposed to said exterior along said vertical directions.

8. The electrical connector as claimed in claim 7 , wherein the frame configuration defines an inner recess to receive foreheads of both said first and second terminal modules therein for securing together.

9. The electrical connector as claimed in claim 7 , wherein the housing forms a pair of guiding grooves behind the tongue portion to retain one of said first terminal module sand said second terminal module.

10. The electrical connector as claimed in claim 7 , wherein each of said first terminal module and said second terminal module forms a stepped structure around a root of said tongue portion.

11. The electrical connector as claimed in claim 7 , wherein one of said first terminal module and said second terminal module include a step compliantly abutting against another stepped structure on the housing for prohibiting further forward movement of said one of the first terminal module and said second terminal module.

12. The electrical connector as claimed in claim 7 , wherein each of the first terminals further includes a first rear tail section extending along the vertical direction and embedded within the first insulative base of the first terminal module, each of the second terminals further includes a second rear tail section extending along the vertical direction and embedded within the second insulative base of the second terminal module, and the second rear tail sections are located in front of the first rear tail sections in the front-to-back direction and commonly regulated by an insulative spacer.

13. The electrical connector as claimed in claim 7 , further including a metallic shell enclosing the housing, wherein the shell includes a plurality of elastic portions extending into the receiving room via corresponding through holes in corresponding peripheral walls of the housing.

14. An electrical connector comprising:

an insulative housing including unitarily a plurality of peripheral walls commonly defining a receiving room, and a tongue portion forwardly extending into the receiving room in a front-to-back direction, and defining a through cavity in a vertical direction perpendicular to front-to-back direction, said through cavity communicating with a rear portion of the housing, a recess formed in the tongue portion; and

a terminal module including a plurality of contacts embedded within and retained by an insulative base, a mating section of each of said contacts supported by the insulative base in the vertical direction, said terminal module forwardly assembled into the housing in the front-to-back direction; wherein

said insulative base is received in the through cavity and a forehead of the insulative base is engaged within the recess for retention.

15. The electrical connector as claimed in claim 14 , further including a metallic shell enclosing the housing, wherein said shell includes a plurality of elastic portions extending into the receiving room through corresponding through holes in the peripheral walls.

16. The electrical connector as claimed in claim 14 , wherein the insulative base forms a stepped structure around a root of said tongue portion.

17. The electrical connector as claimed in claim 14 , wherein the insulative base forms a stepped structure compliantly abutting against the housing for prohibiting further forward movement.