CN111697380B

CN111697380B - Electric connector and manufacturing method thereof

Info

Publication number: CN111697380B
Application number: CN201910188265.1A
Authority: CN
Inventors: 张乐水; 何文; 黄耀諆; 焦罗名; 陈奇; 宋勇
Original assignee: Foxconn Kunshan Computer Connector Co Ltd; Foxconn Interconnect Technology Ltd
Current assignee: Foxconn Kunshan Computer Connector Co Ltd; Foxconn Interconnect Technology Ltd
Priority date: 2019-03-13
Filing date: 2019-03-13
Publication date: 2022-06-24
Anticipated expiration: 2039-03-13
Also published as: CN111697380A

Abstract

An electric connector and a manufacturing method thereof, comprising an insulating body, a plurality of conductive terminals fixed on the insulating body, a shell covering the insulating body and a waterproof ring arranged on the shell, wherein the conductive terminals are provided with fixed parts fixed on the insulating body, contact parts exposed out of the insulating body and welding parts extending out of the insulating body, the shell comprises a first shell and a second shell, the waterproof ring is arranged around the first shell, and the second shell is formed in the first shell in an injection molding mode so as to press the waterproof ring. Through the second casing of injection moulding suppression waterproof circle outside first casing, can effectively stabilize waterproof circle.

Description

Electric connector and manufacturing method thereof

[ technical field ] A method for producing a semiconductor device

The present invention relates to an electrical connector, and more particularly, to an electrical connector having a waterproof ring and allowing forward and reverse insertion.

[ background of the invention ]

Chinese utility model patent No. CN206004057U discloses an electric connector, including insulator, the fixing in a plurality of conductive terminals of insulator, cladding in the metal casing outside the insulator, metal casing's front end cover is equipped with waterproof circle, however, the steadiness between waterproof circle and the metal casing is relatively poor. Further, chinese patent application No. CN106374249A discloses an electrical connector, which includes an insulating housing, a plurality of conductive terminals fixed on the insulating housing, a shielding shell covering the insulating housing, a waterproof portion disposed outside the shielding shell, and a metal shell press-connected to the waterproof portion and welded to the shielding shell. However, the method of welding the two shells to stabilize the waterproof portion inevitably requires the use of a metal shell, which increases the manufacturing cost of the product.

Accordingly, there is a need for an improved electrical connector that overcomes the above-mentioned deficiencies.

[ summary of the invention ]

The technical problem to be solved by the invention is to provide an electric connector which is low in cost and can effectively stabilize a waterproof ring.

The purpose of the invention is realized by the following technical scheme one: an electric connector comprises an insulating body, a plurality of conductive terminals fixed on the insulating body, a shell covering the insulating body and a waterproof ring arranged on the shell, wherein the conductive terminals are provided with fixing parts fixed on the insulating body, contact parts exposed out of the insulating body and welding parts extending out of the insulating body, the shell comprises a first shell and a second shell, the waterproof ring is arranged around the first shell, and the second shell is formed in the first shell in an injection molding mode so as to press the waterproof ring.

Further, the insulating body comprises a base and a tongue plate extending forwards from the base, the holding part is held on the base, the welding part extends out of the base, the contact part is exposed on the butt joint surface of the tongue plate, and a butt joint cavity for inserting a butt joint connector is formed between the tongue plate and the shell.

Further, the waterproof ring is a silica gel ring sleeved on the outer surface of the front end of the first shell.

Further, the waterproof ring extends forwards in the front-rear direction to form the front end faces of the first shell and the second shell.

Furthermore, the front end of the first shell is provided with a front end portion annularly provided with the waterproof ring, the rear end surface of the front end portion is convexly provided with a stop ring for limiting the waterproof ring to move backwards, the rear end of the stop ring is concavely provided with an injection molding groove, the stop ring is penetratingly formed with a through groove communicating the injection molding groove and the front end portion in the front-rear direction, and plastic material is injected from the injection molding groove and flows forwards into the front end portion area to form the second shell pressed above the waterproof ring.

Further, the through groove penetrates through the stop ring upwards.

Furthermore, the waterproof ring is provided with an inner wall surface attached to the outer surface of the front end portion and an outer wall surface attached to the inner surface of the second shell, a first annular convex rib protrudes from the inner wall surface, a second annular convex rib protrudes from the outer wall surface, a first annular groove for embedding the first annular convex rib is concavely arranged on the outer surface of the front end portion, and a second annular groove for embedding the second annular convex rib is arranged on the inner surface of the second shell.

Furthermore, the waterproof ring is provided with an inner wall surface attached to the outer surface of the front end portion and an outer wall surface attached to the inner surface of the second shell, and the outer wall surface is provided with a stop ring protruding from the front end of the stop ring and used for limiting the forward movement of the second shell.

Further, the first housing has a hollow cavity, the electrical connector further includes a limiting blocking portion protruding into the cavity, the limiting blocking portion separates the cavity into the butt-joint cavity at the front end and an assembly cavity corresponding to the base portion at the rear end of the butt-joint cavity, the base portion includes a base and a protruding block protruding from the periphery of the base and having a first guide surface at the rear of the front end surface of the base, the limiting blocking portion includes a blocking piece blocked on the front end surface of the base and a protruding rib located behind the blocking piece and used for the protruding block to abut against, and the protruding rib has a second guide surface matched with the first guide surface.

Further, the electrical connector includes a metal sheet integrally formed on the first housing and having the blocking piece, the protruding rib integrally protrudes from an inner wall surface of the first housing, and a guide groove for guiding the protruding block to slide to the protruding rib is recessed in the inner wall surface of the first housing.

The purpose of the invention can be realized by the following technical scheme one: a method of manufacturing an electrical connector comprising the steps of:

providing a first shell, wherein the first shell is provided with a front end part and an injection molding groove positioned at the rear end of the front end part;

providing a waterproof ring and sleeving the waterproof ring on the front end part of the first shell;

injecting plastic material from the injection molding groove and flowing forwards to the front end part area to form a second shell pressed at the upper end of the waterproof ring;

providing an insulating body fixedly provided with a conductive terminal, and assembling the insulating body in the first shell.

Further, a stop ring for limiting the waterproof ring to move backwards is arranged on the surface of the rear end of the front end portion of the first shell in a protruding mode, a stop ring is arranged on the outer wall face of the front end of the waterproof ring in a protruding mode, a through groove for communicating the injection molding groove to the front end portion is formed in the stop ring, and when the second shell is formed in an injection molding mode, the stop ring limits the plastic material to move backwards, and the stop ring limits the plastic material to move forwards.

Compared with the prior art, the second shell of the electric connector which presses the waterproof ring through injection molding outside the first shell can effectively stabilize the waterproof ring.

[ description of the drawings ]

Fig. 1 is a perspective view of the electrical connector of the present invention.

Fig. 2 is a perspective view of fig. 1 from another perspective.

Fig. 3 is an exploded perspective view of the electrical connector of the present invention.

Fig. 4 is an exploded perspective view of fig. 3 from another perspective.

Fig. 5 is a partially exploded view of the electrical connector of the present invention.

Fig. 6 is an exploded view from another perspective of fig. 3.

Fig. 7 is another partially exploded view of the electrical connector of the present invention, wherein the waterproof ring is mounted to the first housing.

Fig. 8 is an exploded view from another perspective of fig. 7.

Fig. 9 is a further partially exploded view of the electrical connector of the present invention with the housing separated from the dielectric body.

Fig. 10 is an exploded view from another perspective of fig. 9.

Fig. 11 is a cross-sectional view taken along line a-a of fig. 9.

Fig. 12 is a cross-sectional view taken along line B-B of fig. 1.

Fig. 13 is a flow chart of the manufacturing of the housing of the electrical connector of the present invention.

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

[ detailed description ] embodiments

Referring to fig. 1 to 4, the electrical connector 100 of the present invention is preferably a USB Type C connector for positive and negative insertion, but is not limited thereto, and may be other types of electrical connectors. The electrical connector 100 includes an insulating housing 1, a plurality of conductive terminals 2 fixed to the insulating housing 1, a housing 3 covering the insulating housing 1, and a waterproof ring 4 disposed on the housing 3. The electrical connector 100 of the present invention is a board end connector which is mounted on a circuit board (not shown), and a pair of ears 300 mounted on the circuit board (not shown) are provided on both lateral sides of the housing 3. The conductive terminal 2 has a holding portion (not shown) held in the insulating housing 1, a contact portion 21 exposing the insulating housing, and a soldering portion 22 extending out of the insulating housing 1. It should be noted that the electrical connector 100 may also be a plug connector (not shown), and only the board-end connector will be described below.

The insulative housing 1 includes a base 11, a tongue 12 extending forward from the base 11, and a mounting portion 13 extending backward from the base 11, wherein a mating cavity 30 for a mating connector (not shown) to be inserted is formed between the tongue 12 and the housing 3. The holding portion (not shown) is held on the base portion 11, the soldering portion 22 extends out of the base portion 11 and is exposed to the bottom surface of the mounting portion 13, and the contact portion 21 is exposed to the abutting surface 120 of the tongue plate 12. In the present invention, in order to effectively fix the waterproof ring 4 to the housing 3, the housing 3 includes a first housing 31 and a second housing 32, the waterproof ring 4 is enclosed in the first housing 31, the second housing 32 is injection-molded to the first housing 32 to press the waterproof ring 4, and the waterproof ring 4 can be reliably held by the pressing of the second housing 32 injection-molded to the outside of the first housing 31. In the present invention, the waterproof ring 4 is an assembled and sleeved on the outer surface of the front end of the first housing 31, and preferably, the waterproof ring 4 is a high temperature resistant silica gel ring. Of course, the waterproof ring 4 may also be formed by injection molding of liquid silicone on the outer surface of the first housing 31.

As shown in fig. 5 to 12, specifically, the front end of the first housing 31 is provided with a front end portion 310 that surrounds the waterproof ring 4, a stop ring 311 that limits the waterproof ring 4 from moving backwards is protruded from a rear end surface of the front end portion 310, an injection groove 312 is formed at a rear end of the stop ring 311 in a recessed manner, and a through groove 3110 that communicates the injection groove 312 with the front end portion 310 is formed in the stop ring 311 in a front-rear direction in a penetrating manner. When the second housing 32 is molded, the plastic material forming the second housing 32 is injected from the injection molding groove 312 and flows forward to the front end 310 area to form the second housing 32 pressed above the waterproof ring 4. In the present invention, the through groove 3110 penetrates the stop ring 311 upward, so as to facilitate the molding of the through groove 3110 and increase the flow rate of the plastic material of the second housing 32. The waterproof ring 4 extends forward in the front-rear direction beyond the front end surfaces of the first housing 31 and the second housing 32, and the front end of the waterproof ring 4 has a guide surface 40 for guiding the docking connector (not shown) to be docked and inserted into the docking chamber 30. The waterproof ring 4 has an inner wall surface 41 attached to the outer surface of the front end 310 and an outer wall surface 42 attached to the inner surface of the second housing 32, the outer wall surface 42 is provided with a stop ring 420 protruding from the front end of the stop ring 311 to limit the forward movement of the second housing 32, and the stop ring 420 can limit the forward flow of the insulating material of the second housing 32 when the second housing 32 is injection molded. In order to better limit the waterproof ring 4 between the first casing 31 and the second casing 32, the inner wall surface 41 projects a first annular rib 411, the outer wall surface 42 projects a second annular rib 421, the outer surface of the front end portion 310 is recessed with a first annular groove 3101 for the first annular rib 411 to be embedded, and the inner surface of the second casing 32 is provided with a second annular groove 320 for the second annular rib 421 to be embedded.

The first housing 31 has a hollow cavity 313, the electrical connector 100 includes a limit stop 5 protruding into the cavity 313, the limit stop 5 divides the cavity 313 into the mating cavity 30 at the front end and a mounting cavity 3130 corresponding to the base 11 at the rear end of the mating cavity 30, and the limit stop 5 is stopped at the front end of the base 11 to limit the insulation body 1 from moving forward when being mounted in the first housing 31. The base 11 includes a base 110 and a protrusion 111 protruding from the periphery of the base 110 and having a first guiding surface 1110 located behind a front end surface 1101 of the base 110, the limiting blocking portion 5 includes a blocking piece 51 blocked at the front end surface 1101 of the base 110 and a protruding rib 52 located behind the blocking piece 51 and used for the protrusion 111 to abut against, and the protruding rib 52 has a second guiding surface 521 matched with the first guiding surface 1110, so that the insulating body 1 installed in the first housing 31 can be effectively stopped. It should be noted that the stopper 51 and the front end surface 1101 of the base 110 are vertical surfaces that abut against each other, and the protrusion 111 and the rib 52 are inclined surfaces that abut against each other. Specifically, the electrical connector of the present invention includes the metal plate 50 having the stopper 51 integrally formed with the first housing 31, and the rib 52 integrally protrudes from the inner wall surface 301 of the first housing 31. Of course, the structure of the limit stop portion 5 is not limited thereto, and the stop piece 51 may be integrally formed on the inner wall surface 301 of the first housing 31 in a protruding manner, or both the stop piece 51 and the protruding rib 52 may be formed on the metal sheet 50. In addition, in order to facilitate the installation of the insulating body 1 into the cavity 313 from the back to the front and reliable circumferential limitation, a guide groove 3010 for guiding the protrusion 111 to slide to the rib 52 is concavely arranged on the inner wall surface 301 of the first housing 31.

Referring to fig. 13, a method for manufacturing the electrical connector 100 of the present invention is described, in which a first step S1 is to provide a first housing 31, preferably made of plastic, the first housing 31 having a front end 310 and an injection molding groove 312 at a rear end of the front end 310; a second step S2, providing a waterproof ring 4, wherein the waterproof ring 4 is assembled and sleeved on or molded on the front end 310 of the first shell 31 by liquid silicone rubber; thirdly, providing a plastic material, injecting the plastic material from the injection molding groove 312 and flowing the plastic material forwards to the area of the front end part 310 to form a second shell 32 pressed at the upper end of the waterproof ring 4; fourthly, referring to fig. 9, providing the insulating body 1 fixedly provided with the conductive terminals 2, and assembling the insulating body 1 in the first housing 31. In order to limit the flow of the plastic material forming the second housing 32 during the injection molding of the second housing 32 in the third step S3, in the first step, a stop ring 311 for limiting the backward movement of the waterproof ring 4 is protruded from the rear end surface of the front end portion 310 of the first housing 31, a stop ring 420 is protruded from the outer wall surface of the front end of the waterproof ring 4, and the stop ring 311 is provided with a through groove 3110 for connecting the injection groove 312 to the front end portion 310, so that the stop ring 311 can limit the backward movement of the plastic material and the stop ring 420 can limit the forward movement of the plastic material. Further, in order to more preferably restrict the movement of the waterproof ring 4, in the first step S1, a first annular groove 3101 is concavely formed on an outer surface of the front end portion 310 of the first case 31, in the second step S2, a first annular rib 411 that engages with the first annular groove 3101 protrudes from an inner wall surface 41 of the waterproof ring 4, and a second annular rib 421 protrudes from an outer wall surface 42 of the waterproof ring 4, and in the third step S3, a second annular groove 320 that engages with the second annular rib 421 is provided from an inner surface of the second case 32 after injection molding.

The above description is only a part of the embodiments of the present invention, and not all embodiments, and any equivalent variations of the technical solutions of the present invention, which are made by those skilled in the art through reading the present specification, are covered by the claims of the present invention.

Claims

1. An electric connector comprises an insulating body, a plurality of conductive terminals fixed on the insulating body, a shell covering the insulating body and a waterproof ring arranged on the shell, wherein the conductive terminals are provided with fixed parts fixed on the insulating body, contact parts exposed out of the insulating body and welding parts extending out of the insulating body, and the electric connector is characterized in that: the shell comprises a first shell and a second shell, the waterproof ring is arranged around the first shell, the second shell is formed in the first shell in an injection molding mode to press the waterproof ring, the front end of the first shell is provided with a front end portion annularly arranged on the waterproof ring, a stop ring used for limiting the waterproof ring to move backwards is arranged on the surface of the rear end of the front end portion in a protruding mode, an injection molding groove is formed in the rear end of the stop ring in a concave mode, a through groove used for communicating the injection molding groove with the front end portion is formed in the stop ring in a penetrating mode in the front-rear direction, and plastic materials are injected from the injection molding groove and flow forwards into the area of the front end portion to form the second shell pressed above the waterproof ring.

2. The electrical connector of claim 1, wherein: the insulating body comprises a base and a tongue plate extending forwards from the base, the holding part is held on the base, the welding part extends out of the base, the contact part is exposed on the butt joint surface of the tongue plate, and a butt joint cavity for inserting a butt joint connector is formed between the tongue plate and the shell.

3. The electrical connector of claim 2, wherein: the waterproof ring is a silica gel ring sleeved on the outer surface of the front end of the first shell.

4. The electrical connector of claim 1, wherein: the waterproof ring extends forwards in the front-rear direction to form the front end faces of the first shell and the second shell.

5. The electrical connector of claim 1, wherein: the through groove penetrates through the stop ring upwards.

6. The electrical connector of claim 1, wherein: the waterproof ring is provided with an inner wall surface attached to the outer surface of the front end portion and an outer wall surface attached to the inner surface of the second shell, the inner wall surface protrudes and extends to form a first annular convex rib, the outer wall surface protrudes and extends to form a second annular convex rib, a first annular groove for embedding the first annular convex rib is concavely formed in the outer surface of the front end portion, and a second annular groove for embedding the second annular convex rib is formed in the inner surface of the second shell.

7. The electrical connector of claim 1, wherein: the waterproof ring is provided with an inner wall surface attached to the outer surface of the front end portion and an outer wall surface attached to the inner surface of the second shell, and the outer wall surface is provided with a stop ring which limits the forward movement of the second shell in a protruding mode at the front end of the stop ring.

8. The electrical connector of claim 2, wherein: the first shell is provided with a hollow cavity, the electric connector further comprises a limiting blocking part which extends into the cavity in a protruding mode, the limiting blocking part divides the cavity into a butt joint cavity located at the front end and an assembly cavity located at the rear end of the butt joint cavity and corresponding to the base part, the base part comprises a base body and protruding blocks which protrude from the periphery of the base body and are provided with first guide surfaces behind the front end surface of the base body, the limiting blocking part comprises blocking pieces which are blocked on the front end surface of the base body and protruding ribs which are located behind the blocking pieces and used for the protruding blocks to abut against, and the protruding ribs are provided with second guide surfaces matched with the first guide surfaces.

9. The electrical connector of claim 8, wherein: the electric connector comprises a metal sheet which is integrally formed on the first shell and provided with the blocking piece, the protruding rib integrally protrudes from the inner wall surface of the first shell, and a guide groove which guides the protruding block to slide to the protruding rib is concavely arranged on the inner wall surface of the first shell.

10. A method of manufacturing an electrical connector, comprising the steps of:

providing an insulating body fixedly provided with a conductive terminal, and assembling the insulating body in the first shell;

the rear end surface of the front end part of the first shell is convexly provided with a stop ring used for limiting the waterproof ring to move backwards, and the stop ring is provided with a through groove which communicates the injection molding groove to the front end part.

11. The method of manufacturing an electrical connector of claim 10, wherein: the outer wall surface of the front end of the waterproof ring is provided with a stop ring in a protruding mode, and when the second shell is formed in an injection molding mode, the stop ring limits backward movement of the plastic material, and the stop ring limits forward movement of the plastic material.