A water-proof connector includes an internal housing, a PCB, a shielding shell, a sealing ring and an external housing. The internal housing has a base portion and a tongue board. A central of the internal housing defines an inserting chamber. A rear of the base portion is concaved forward to form a first receiving cavity, and further concaved forward to form an extending cavity. The PCB includes a connecting portion and an inserting portion. A plurality of terminals are electroplated in the inserting portion. The inserting portion of the PCB is inserted in the inserting chamber and the connecting portion is inserted in the extending cavity. The shielding shell covers around the tongue board of the internal housing. The sealing ring sheathes an outside of the connecting portion of the PCB. The external housing is molded outside the internal housing, the PCB, the shielding shell and the sealing ring.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a connector, and more particularly to a water-proof connector.

2. The Related Art

A traditional water-proof connector includes an internal housing, a plurality of terminals, a shielding shell and an external housing. The terminals are integrated in the internal housing. The shielding shell sheathes outside the internal housing. The external housing is molded outside the internal housing and the external shell.

However, the sealability of the traditional water-proof connector is poor, so water is easily infiltrate into the interior of the traditional water-proof connector by the high pressure of the water. So inventor need to provide a high grade of water-proof connector to resolve the defect of the traditional water-proof connector.

SUMMARY OF THE INVENTION

Accordingly, an object of the present invention is to provide a water-proof connector. The water-proof connector includes an internal housing, a PCB (Printed Circuit Board), a shielding shell, a sealing ring and an external housing. The internal housing has a base portion. A front of the base portion extends frontward to form a tongue board with a smaller dimension than the base portion. A central of the internal housing defines an inserting chamber penetrating through the front and rear faces of the internal housing in longitudinal direction. A rear face of the base portion surrounding the inserting chamber is concaved forward to form a first receiving cavity, and a bottom face of the first receiving cavity is further concaved forward to form an extending cavity. The PCB includes a connecting portion and an inserting portion. A plurality of terminals are electroplated in the inserting portion. The inserting portion of the PCB is inserted in the inserting chamber of the internal housing. A front end of the connecting portion of the PCB is inserted in the extending cavity of the base portion of the internal housing. The shielding shell covers around the tongue board of the internal housing. The sealing ring sheathes an outside of the connecting portion of the PCB and the front end of the sealing ring is inserted in the first receiving cavity of the internal housing. The external housing is molded outside the internal housing, the PCB, the shielding shell and the sealing ring.

As described above, the embodiment of the invention of the water-proof connector by virtue of the shielding shell sheathes an outside of the front end of the internal housing, the PCB is inserted in the internal housing, the sealing ring sheathes an outside of the PCB and sealed in the rear of the internal housing to reach a high grade of water-proof ingress protection.

DETAILED DESCRIPTION OF THE EMBODIMENT

Referring toFIG. 1andFIG. 2, an embodiment of the present invention is shown as a water-proof connector100includes an internal housing10, a PCB20, a shielding shell30, a sealing ring40and an external housing50.

Referring toFIGS. 2 to 6, the internal housing10has a base portion11. A front of the base portion11extends frontward to form a tongue board12with a smaller dimension than the base portion11. A central of the internal housing10defines an inserting chamber13penetrating through the front and rear faces of the internal housing10in longitudinal direction. Two opposite sidewalls of the inserting chamber13protrude face-to-face inward to form a pair of convex131. A central of a top face of the tongue board12protrudes upward to form an elongated blocking lump121. Two opposite sides of a bottom face of the tongue board12protrude downward to form a pair of blocking columns122. A rear face of the base portion11surrounding the inserting chamber13is concaved forward to form a first receiving cavity111, and a bottom face of the first receiving cavity111is further concaved forward to form an extending cavity112.

The PCB20has a connecting portion21and an inserting portion22extending frontward from the connecting portion21. In the embodiment of the present of the water-proof connector100, a plurality of terminals (not shown) are electroplated in the bottom face of the inserting portion22. Two opposite sides of the connecting portion21of the PCB20are concaved inward to form a pair of positioning slots211. Two opposite sides of the inserting portion22of the PCB20are concaved inward to form a pair of slots221corresponding to the convex131of the internal housing10. The inserting portion22of the PCB20is inserted in the inserting chamber13of the internal housing10, and the front end of the connecting portion21is received in the extending cavity112of the base portion11of the internal housing10.

The sealing ring40sheathes an outside of the PCB20.

The external housing50has an external shell51and a pair of positioning lumps52. The external shell51has a top wall511, a bottom wall512, a rear wall513and two side walls514. The top wall511, bottom wall512, rear wall513and two side walls514together form an accepting cavity515. The rear wall513of the external shell51is defined a through hole5131penetrating through the rear wall513corresponding to the extending cavity112of the internal housing10. A front face of the rear wall513of the external shell51surrounding the through hole5131is concaved rearward to form a second receiving cavity5132. Two positioning lumps52of the external housing50protrude face-to-face to form a pair of wedge-shaped lumps521, the rear of the wedge-shaped lump521is thicker than the front thereof.

Referring toFIGS. 1 to 6, in assembly, the PCB20and the shielding shell30are placed in a mould, and inserting portion22of the PCB20is inserted in the receiving slot34of the shielding shell30. The tongue board12of the internal housing10is molded in the gap between the inserting portion22of the PCB20and the shielding shell30and the base portion11of the internal housing10is molded surround the connecting portion21of the PCB20in the rear of the shielding shell30, and the overall dimension of the base portion11of the internal housing10is the same as the shielding shell30. The inserting portion21of the PCB20is inserted in the inserting chamber13of the internal housing10and the two convex131of the inserting chamber13are fastened in the slots221of the inserting portion22. A front end of the connecting portion21of the PCB20is inserted in the extending cavity112of the base portion11of the internal housing10. The blocking lump121of the tongue board12of the internal housing10is buckled in the blocking slot311of the top plate31of the shielding shell30. The two blocking columns122of the tongue board12of the internal housing10are buckled in the blocking holes321of the bottom plate32of the shielding shell30.

Fill a little plastic in the first receiving cavity111of the base portion11of the internal housing10. Then, the sealing ring40sheathes an outside of the connecting portion21of the PCB20and move the sealing ring40forward till the front end of the sealing ring40is inserted in the first receiving cavity111of the internal housing10.

The external housing50is molded outside the internal housing10, the PCB20, the shielding shell30and the sealing ring40. The internal housing10and the shielding shell30are received in the accepting cavity515of the external shell51of the external housing50. The buckling slices331of two side plates33of the shielding shell30resist against the sidewalls of the accepting cavity515to prevent the external shell51away from the shielding shell30. The rear end of the sealing ring40is received in the second cavity5132. The connecting portion21of the PCB20passes through the through hole5131of the external shell51and projects beyond the rear face of the rear wall513of the external shell51. Two positioning lumps52are positioned at two opposite sides of the connecting portion21of the PCB20, and the wedge-shaped lumps521of the positioning lumps52are buckled in the positioning slots211to prevent the PCB20pull out of the butting connector.

As described above, the embodiment of the invention of the water-proof connector100by virtue of the shielding shell30sheathes an outside of the front end of the internal housing10, the PCB20is inserted in the internal housing10, the sealing ring40sheathes an outside of the PCB20and sealed in the rear of the internal housing10to reach a high grade of water-proof ingress protection.