Waterproof electrical connector having a shielding shell with a stepped and recessed structure

1. An electrical connector comprising:

an insulative housing having a rear base and a front tongue;

an upper and lower rows of contacts mounted in the insulative housing and exposed to the tongue;

a shielding shell enclosing the insulative housing; and

a sealing element sealing a junction between the insulative housing and the shielding shell; wherein

the shielding shell includes an annular rear step located immediately adjacent the junction and a recess at a corner of the step; and

the base of the insulative housing includes a step fitting the rear step of the shielding shell.

2. The electrical connector as claimed in claim 1 , wherein the recess is adapted for admitting spilled sealing material during forming the sealing element.

3. The electrical connector as claimed in claim 1 , wherein the recess is located forwardly of the step of the insulative housing.

4. The electrical connector as claimed in claim 1 , wherein the shielding shell includes a protrusion, a rear side of the protrusion forming a part of the rear step and the recess.

5. The electrical connector as claimed in claim 1 , wherein the rear step of the shielding shell includes a horizontal part and a vertical part, and the recess of the shielding shell continues the first part into the second part.

6. An electrical connector comprising:

an insulative housing having a rear base and a front tongue along a front-to-back direction;

an upper and lower rows of contacts arranged with each other in a vertical direction perpendicular to said front-to-back direction, and mounted in the insulative housing and exposed upon the tongue;

a metallic shielding shell enclosing the insulative housing, said metallic shielding shell forming an annular front rearward step and a rear rearward step which is located not only behind the front rearward step in the front-to-back direction but also outside the front rearward step in the vertical direction; and

a sealing element sealing a junction between the insulative housing and the shielding shell, and located intimately behind both a rearward face of the rear base and the rear rearward step in the front-to-back direction.

7. The electrical connector as claimed in claim 6 , wherein said rear base includes an inner base portion integrally formed upon the contacts via an insert-molding process, and an outer base portion integrally formed upon the inner base portion via an overmolding process, and the inner base portion is rearward offset from the outer base portion around said rearward face of the rear base.

8. The electrical connector as claimed in claim 6 , wherein said shielding shell defines an opening through which the front tongue extends.

9. The electrical connector as claimed in claim 8 , wherein both said outer base portion and said inner base portion extend through said opening while only said outer base portion abuts against the front rearward step.

10. The electrical connector as claimed in claim 6 , wherein said shielding shell forms a recess located at an inner corner of the front rearward step and directly rearwardly facing a gap between the shielding shell and the insulative housing in the front-to-back direction so as to receive the leaked sealing element which invades through said gap.

11. The electrical connector as claimed in claim 10 , wherein the base of the insulative housing includes a step abutting against the front rearward step of the shielding shell in a front-to-back direction.

12. The electrical connector as claimed in claim 1 , wherein the recess is annular.

13. An electrical connector comprising:

an insulative housing having a rear base and a front tongue along a front-to-back direction;

an upper and lower rows of contacts arranged with each other in a vertical direction perpendicular to said front-to-back direction, and mounted in the insulative housing and exposed upon the tongue;

a metallic shielding shell enclosing the insulative housing, said metallic shielding shell forming a front rearward step and a rear rearward step which is located not only behind the front rearward step in the front-to-back direction but also outside the front rearward step in the vertical direction;

the housing including a front step abutting against the front rearward step in the vertical direction and forwardly communicating with the mating opening in the front-to-back direction, and further including a rear step forwardly abutting against the front rearward step in the front-to-back direction and abutting against the rear rearward step in the vertical direction; and

a sealing element sealing a junction between the insulative housing and the shielding shell, and located intimately behind and forwardly communicating with both the rear rearward step and the rear step in the front-to-back direction.

14. The electrical connector as claimed in claim 13 , wherein said rear base includes an inner base portion integrally formed upon the contacts via an insert-molding process, and an outer base portion integrally formed upon the inner base portion via an overmolding process, and the inner base portion is rearward offset from the outer base portion around said rearward face of the rear base.

15. The electrical connector as claimed in claim 13 , wherein said shielding shell defines an opening through which the front tongue extends.

16. The electrical connector as claimed in claim 15 , wherein both said outer base portion and said inner base portion extend through said opening while only said outer base portion abuts against the front rearward step.

17. The electrical connector as claimed in claim 13 , wherein said shielding shell forms a recess located at an inner corner of the front rearward step and the rear rearward step, and directly rearwardly facing a gap between the shielding shell and the insulative housing in the front-to-back direction so as to receive the leaked sealing element which invades through said gap.

18. The electrical connector as claimed in claim 17 , wherein the recess is annular.