Waterproof electrical connector having an insulative shell insert-molded with a metal shell

1. An electrical connector comprising:

an insulative housing having a base portion and a tongue portion extending forwardly from the base portion;

a plurality of terminals retained in the insulative housing;

a shielding shell attached to the insulative housing to form a receiving space;

a metal shell positioned around an outside of the shielding shell and having a plurality of affixed legs for mounting on a printed circuit board; and

an insulative shell surrounding the shielding shell and integrally formed with at least one of the metal shell and the shielding shell via an insert-molding process so as to achieve waterproof function; wherein

the shielding shell includes a tail portion, and the metal shell includes a rear end welded to the tail portion.

2. The electrical connector as claimed in claim 1 , wherein the shielding shell forms no soldering legs.

3. The electrical connector as claimed in claim 1 , wherein said insulative shell is integrally formed with only the metal shell.

4. The electrical connector as claimed in claim 1 , wherein said metal shell has a number of holding holes filled by insulative materials forming the insulative shell.

5. The electrical connector as claimed in claim 1 , wherein the tongue portion is exposed from the shielding shell, and the insulative shell defines a receiving cavity receiving the exposed tongue portion.

6. The electrical connector as claimed in claim 5 , wherein the insulative shell defines a pair of stepping portions located at an upper inner surface and a lower inner surface thereof to divide the upper surface and the lower surface with a pair of front inner surfaces located in front of the stepping portions and a pair of rear inner surfaces located behind the stepping portions, and outer surfaces of the shielding shell contact at a position close to the rear inner surfaces to resist front ends of the shielding shell with the stepping portions.

7. The electrical connector as claimed in claim 5 , wherein said pair of front inner surfaces defines a distance therebetween smaller than a distance between the pair of rear inner surfaces, and inner surfaces of the shielding shell are aligned with the front inner surfaces of the insulative shell.

8. The electrical connector as claimed in claim 7 , wherein a lower wall of the insulative shell is exposed forwardly from an upper wall of the insulative shell.

9. The electrical connector as claimed in claim 1 , wherein said metal shell has a pair of first affixed legs and second affixed legs located at two sides thereof, and the first affixed legs are located lower than the second affixed legs along a vertical direction.

10. The electrical connector as claimed in claim 1 , wherein the insulative housing has a rear portion extending rearwardly from the base portion, and the tail portion of the shielding shell extends outside the insulative shell over the rear portion.

11. An electrical connector comprising:

an insulative housing having a base portion and a tongue portion extending forwardly from the base portion;

a plurality of terminals retained in the insulative housing;

a shielding shell attached to the insulative housing to form a receiving space, the tongue portion exposed out of the receiving space; and

an insulative shell enclosing the shielding shell to form a receiving cavity to receive the tongue portion extending forwardly beyond the shielding shell, the insulative shell defining a stepping portion on thereof an interior surface facing the receiving cavity to form a front inner surface located in front of the stepping portion and a rear inner surface located behind the stepping portion, wherein

the shielding shield is located behind the stepping portion and an exterior surface of the shielding shell intimately contacts the rear inner surfaces of the insulative shell; and

the insulative shell is insert molded with the shielding shell.

12. The electrical connector as claimed in claim 11 , wherein an interior surface of the shielding shell is coplanar with the front inner surface of the insulative shell.

13. The electrical connector as claimed in claim 11 , wherein a front edge of the shielding shell abuts forwardly against the stepping portion.

14. The electrical connector as claimed in claim 11 , further including a metal shell associated with the insulative shell, wherein the metal shell includes a plurality of affixed legs for mounting to a printed circuit board while the shielding shell has no affixed legs thereof.

15. An electrical connector comprising:

an insulative housing having a base portion and a tongue portion extending forwardly from the base portion;

a plurality of terminals retained in the insulative housing;

a shielding shell attached to the insulative housing to form a receiving space, the tongue portion exposed out of the receiving space;

an insulative shell enclosing the shielding shell to form a receiving cavity to receive the tongue portion extending forwardly beyond the shielding shell, the insulative shell defining a stepping portion on thereof an interior surface facing the receiving cavity to form a front inner surface located in front of the stepping portion and a rear inner surface located behind the stepping portion; and

a metal shell associated with the insulative shell, wherein the metal shell includes a plurality of affixed legs for mounting to a printed circuit board; wherein

the shielding shield is located behind the stepping portion and an exterior surface of the shielding shell intimately contacts the rear inner surfaces of the insulative shell; wherein

the shielding shell is welded to the metal shell at a position behind the insulative shell in a front-to-back direction.

16. The electrical connector as claimed in claim 15 , wherein at said position, the shielding shell is sandwiched between the metal shell and the insulative housing in a vertical direction perpendicular to said front-to-back direction.

17. The electrical connector as claimed in claim 16 , wherein said terminals includes soldering portions right under said position.

18. The electrical connector as claimed in claim 15 , wherein said insulative shell is insert molded with at least one of the shielding shell and the metal shell.