Electrical connector having deep drawn sleeve with two parts of different dimensions

1. An electrical connector comprising:

an insulative housing having a rear base and a front tongue with two opposite surfaces;

a plurality of contacts secured to the insulative housing and exposed to the two opposite surfaces of the tongue; and

a deep drawn sleeve having a front part of a first transverse dimension and a rear part of a second transverse dimension less than the first transverse dimension; wherein

the rear part of the sleeve is mounted to the base of the insulative housing and has a notch, and the base of the insulative housing has a restraining rib engaging the notch; and

a transition is formed between the front part and the rear part of the sleeve with a forward abutting face which is adapted to be abutted against by a complementary plug connector inserted into the front part of the sleeve.

2. The electrical connector as claimed in claim 1 , further comprising a sealing member sealed among the rear part of the sleeve, the base of the insulative housing, and the plurality of contacts.

3. The electrical connector as claimed in claim 2 , wherein the rear part of the sleeve has a slot for formation of the sealing member in place.

4. The electrical connector as claimed in claim 1 , further comprising a metallic cover securing the base of the insulative housing to the rear part of the sleeve.

5. The electrical connector as claimed in claim 4 , wherein the metallic cover is welded to the sleeve and has a pair of board-mounting legs.

6. An electrical connector comprising:

a contact module including an insulative housing and a plurality of contacts integrally formed within the housing, the housing including a front tongue and a rear base along a front-to-back direction;

a metallic seamless deep drawn sleeve receiving the contact module and including a front part defining a first cross-sectional dimension and a rear part defining a second cross-sectional dimension smaller than the first cross-sectional dimension in both a vertical direction and a lateral direction perpendicular to each other and commonly perpendicular to the front-to-back direction, a transition formed between the front part and the rear part along the front-to-back direction with a forward abutting face which is adapted to be abutted against by a complementary plug connector inserted into the front part of the sleeve; and

a metallic cover secured upon the sleeve; wherein

the base forms a pair of positioning grooves behind the rear part of the sleeve and exposed to an exterior, and the cover forms a pair of claws engaged with the corresponding positioning grooves for securement therebetween;

the rear part of the sleeve is mounted to the base of the insulative housing and has a notch, and the base of the insulative housing has a restraining rib received in the notch so as to abut against the sleeve at least in the front-to-back direction; and

the base includes a front portion and a rear portion with a gap therebetween in the front-to-back direction, said gap being located in front of the notch and filled with a sealing member.

7. The electrical connector as claimed in claim 6 , wherein said gap is located behind the transition in the front-to-back direction.

8. The electrical connector as claimed in claim 6 , wherein in the base, an upper face of the front portion is coplanar with that of the rear portion while a lower face of the front portion is higher than that of the rear portion because of said restraining rib extending downwardly into the notch.

9. The electrical connector as claimed in claim 6 , wherein the rear part of the sleeve forms a slot in alignment with the gap in the vertical direction for filling a sealing member into the gap from the exterior.

10. The electrical connector as claimed in claim 6 , wherein the cover includes a front section intimately and compliantly positioned upon the front part of the sleeve, a rear section intimately and compliantly positioned upon the rear part of the sleeve, and a connecting part located between the front section and the rear section and intimately positioned upon the transition of the sleeve.

11. The electrical connector as claimed in claim 6 , wherein the base is dimensioned larger than the tongue in the vertical direction.

12. The electrical connector as claimed in claim 6 , wherein a thickness of the sleeve is larger than that of the cover.

13. The electrical connector as claimed in claim 6 , wherein the sleeve forms a receiving space in front of the transition for receiving a plug connector therein, and the base forwardly extends into the receiving space with a distance being around one half of a length of the tongue in the front-to-back direction.

14. The electrical connector as claimed in claim 13 , wherein the whole base keeps a flat upper face upwardly abutting against an interior upper surface of the sleeve.

15. An electrical connector comprising:

an insulative housing having a rear base and a front tongue with two opposite surfaces;

a plurality of contacts secured to the insulative housing and exposed to the two opposite surfaces of the tongue;

a deep drawn sleeve having a front part of a first transverse dimension and a rear part of a second transverse dimension less than the first transverse dimension; and

a sealing member sealed among the rear part of the sleeve, the base of the insulative housing, and the plurality of contacts; wherein

the rear part of the sleeve is mounted to the base of the insulative housing and has a notch, and the base of the insulative housing has a restraining rib engaging the notch; and

the rear part of the sleeve has a slot for formation of the sealing member in place.

16. The electrical connector as claimed in claim 15 , further comprising a metallic cover securing the base of the insulative housing to the rear part of the sleeve.

17. The electrical connector as claimed in claim 16 , wherein the metallic cover is welded to the sleeve and has a pair of board-mounting legs.