TWI739964B - Electrical connector - Google Patents

Abstract

An electrical connector includes an insulative housing, a number of contacts and a metal plate retained in the insulative housing. The insulative housing includes a base portion and a mating portion extending from the base portion. The contact includes a contacting portion and a soldering portion. The contact includes a grounding contact defining a first soldering portion. The metal plate includes a second soldering portion. The first soldering portion and the second soldering portion are connected by soldering. Soldering surfaces of the first soldering portion and the second soldering are coated with solder.

Description

Electrical connector

The invention is an electrical connector.

The Chinese Mainland Utility Model No. CN204809558U patent discloses a USB Type-C socket connector, which can be inserted into the corresponding plug connector in both front and back directions. The socket connector includes an upper row of terminals, a lower row of terminals, and a metal shielding sheet located between the upper and lower rows of terminals. The grounding terminals and the shielding pieces in the upper and lower rows of terminals respectively extend out of the wings, and the wings are welded together. Spot welding technology, especially laser spot welding technology is widely used in Type-C, and the above-mentioned wings are generally welded together by laser spot welding. However, since the terminals are made of copper alloy and the shielding sheet is made of stainless steel, the composition of the two is different, and the melting point is different. Spot welding technology may cause empty welding, so that a good electrical connection is not formed between the ground terminal and the shielding sheet. Sexual connection.

Therefore, it is necessary to develop a new electrical connector to solve the above-mentioned problems.

The purpose of the present invention is to provide an electrical connector which has a good welding effect.

In order to achieve the above objective, the present invention can be achieved by adopting the following technical solutions: an electrical connector, including an insulating body, conductive terminals and metal parts carried in the insulating body, the insulating body including a base and a butting portion, the conductive terminal The conductive terminal includes a contact portion extending to the mating portion and a pin extending out of the base portion, the conductive terminal includes a ground terminal, the ground terminal has a first welding portion, and the metal piece has a second welding portion; the first welding portion It is combined with the second welding part by spot welding, and the welding surfaces of the first and second welding parts are both covered with solder.

The present invention can also be implemented by adopting the following technical solutions: an electrical connector comprising an insulating body, a first metal piece and a second metal piece carried on the insulating body, the first metal piece has a first welding part, and the first metal piece The two metal parts have a second welding part; the first welding part and the second welding part are joined together by spot welding, and the welding surfaces of the first and second welding parts are both covered with solder.

Compared with the conventional technology, the present invention realizes good welding through the combination of spot welding and soldering technology, especially small metal components of different materials.

100: electrical connector

10: Insulating body

10a, 10b: terminal module

10c: Insulating material

101: Docking cavity

11: Base

112: convex strip

12: Butt tongue

121: Butt

122: step part

1221: upper butt

1222: lower butt surface

20: Conductive terminal

20a: Upper row of conductive terminals

20b: Lower row of conductive terminals

20G: Ground terminal

21: Contact

22: Pin

24: The first welding department

241: Welding surface

242: Back

243: Spot Welding Shallow Groove

25: The first welding department

251: Welding surface

252: Back

26: The first welding department

30: metal plate

31: Lock side edge

34: The second welding part

341, 342: Welding surface

35: The second welding part

40: metal shell

41: inner metal shell

42: Outer metal shell

421: Circuit board pin

422: Back Wall

50: Metal half ring

56: The second welding part

The first figure is a perspective view of the electrical connector according to the first embodiment of the present invention.

The second figure is a three-dimensional exploded view of the first figure.

The third figure is a further exploded perspective view of the electrical connector in the second figure.

The fourth figure is a perspective view of the upper and lower rows of conductive terminals and the metal plate in the electrical connector in the third figure.

The fifth figure is an exploded perspective view of the upper and lower rows of conductive terminals and the metal plate of the present invention before being welded.

Figure 6 is a perspective view of Figure 5 from another angle.

The seventh figure is a side view of the second embodiment of the present invention, showing the positional relationship between the upper and lower rows of conductive terminals and the metal plate.

The eighth figure is a perspective view of the third embodiment of the present invention, in which the metal shell is removed.

The ninth figure is a further exploded perspective view of the eighth figure.

The present invention provides a welding technology, which can perform good welding of metal elements of two different materials by combining spot welding and tin welding. Hereinafter, specific embodiments of the electrical connector of the present invention will be described in conjunction with the first to the ninth figures.

The first to sixth figures show the first embodiment of the present invention. The electrical connector 100 of this embodiment is a USB Type-C receptacle connector mounted on a circuit board (not shown). The electrical connector 100 The insulating body 10 includes an insulating body 10, a conductive terminal 20 carried in the insulating body, and a metal plate 30. The insulating body 10 includes a base 11 and a mating tongue plate 12 extending from the base. The plate 12 is provided with a thickened step 122 adjacent to the base 11. The conductive terminal 20 includes a contact portion 21 extending to the mating tongue plate and a pin 22 extending out of the base 11. The outer side of the insulating body 10 is covered with a metal shell 40 which includes an inner metal shell 41 and an outer metal shell 42. The inner metal shell 41 surrounds the butting tongue plate 12 to form a butting cavity 101 between the two. The shell 42 is welded to the top wall of the inner metal shell 41 by spot welding, and two circuit board pins 421 and the rear wall 422 are extended at the same time. The outer peripheral surface of the base 11 is provided with a plurality of protruding strips 112 extending forward and backward, which interfere with the rear inner edge of the inner metal shell 41 to increase the interference holding force of the two.

The conductive terminals 20 are divided into upper and lower rows. The upper row of conductive terminals 20a and insulating material are injection molded to form a terminal module 10a, and the lower row of conductive terminals 20b and insulating material are injection molded to form the other terminal module 10b. Two terminal module clamps After holding the metal plate 30, an insulating material 10c (as shown in the third figure) is injection-molded to form a complete insulating body 10 carrying the conductive terminals 20 and the metal plate 30. The two side edges of the metal plate extend The side surface of the butting tongue plate 12 forms a side edge 31 of the lock buckle. Continuing to refer to Figures 3 and 4, each row of conductive terminals includes two ground terminals 20G, and a wing-like structure extends from the side of the ground terminal 20G. The wing-like structure forms the first welding portion 24, and the metal plate A wing-like structure also extends from the side surface, and the wing-like structure forms the second welding portion 34. In this embodiment, the first welding parts 24 of the upper and lower grounding terminals are respectively flatly attached to the second welding parts 34 and then welded together to form a good electrical connection. The present invention realizes good welding through the combination of spot welding and solder. After welding, the first welding part 24 The upper surface is left with a spot welding shallow groove 243 due to spot welding, and tin plating covers the welding surface of the first and second welding parts, as shown in the enlarged view of the third figure. The welding process will be described in detail below.

As shown in the fifth and sixth figures, the lower surface of the first welding portion 24 of the upper row of ground terminals 20G is the welding surface 241, the opposite to the welding surface 241 is the back surface 242, and the upper surface of the metal plate 30 is the welding surface 341. In the present invention, the soldering surface 341 of the metal plate 30 is first coated (mainly by means of electroplating) with solder paste, as indicated by the network structure Sn shown in the fifth figure. After the first welding part 24 is flatly attached to the welding surface of the second welding part 34, spot welding is performed on the back side 242, such as laser spot welding. The instant high temperature will melt the solder paste, and the molten tin will climb to the first The welding surface 241 of the welding part, thereby completing the welding. In order to ensure the smooth tin climbing, the welding surface 241 (of course, other surfaces may also be included) of the first welding portion 24 can be gold-plated, as shown in the mesh structure Au shown in the fifth figure. Similarly, the lower surface of the second welding portion 34 of the metal plate 30 is also a welding surface 342, which is electroplated with a tin layer, and the ground terminal 20G of the lower row of conductive terminals 20b is also welded to the lower surface of the metal plate 30 by spot welding. Soldering is generally used to solder the pins of conductive terminals on the circuit board, and then melt them through a furnace to achieve the soldering of the pins on the circuit board. The present invention combines solder paste and spot welding technology, which is very suitable for different The structure of two metal pieces of material. In this embodiment, the conductive terminal 20 is made of copper alloy, and the metal plate 30 is made of stainless steel. Both have different melting points and metal molecules. The structure of spot welding and solder paste meets the requirements of different materials. Welding of small components. Of course, in the same material, the combination of spot welding and solder paste can also be applied.

The seventh figure shows the second embodiment. In this embodiment, the front end of the ground terminal 20G and the metal plate 30 are welded by spot welding and solder paste. The first welding portion 25 extends from the front end of the ground terminal 20G. The welding surface of a welding part 25 is plated with gold; the second welding part 35 is located at the front end of the metal plate 30, and the upper and lower surfaces of the second welding part 35 are all welding surfaces, all of which are tin-plated. By laser spot welding on the back surface 252 of the welding surface 251 of the first welding part 25, the solder paste climbs to the welding surface 251 of the first welding part 25, thereby realizing welding.

The eighth and ninth figures show the third embodiment. The mating tongue plate 12 is provided with a thickened step portion 122 adjacent to the base 11, and a metal half ring 50 covers the butting surface of the step portion 122. The two ends of the metal half ring 50 extend from the second welding part 56. The second welding part 56 is plated with a tin layer. A wing structure extends laterally from the side surface of the ground terminal. The surface of the welding portion 26 is plated with gold. When spot welding is performed on the back surface of the first welding part 26, the solder paste of the second welding part 56 is melted and overflows to the first welding part 26, so that the first welding part 26 is welded to the second welding part 56. In this embodiment, the upper abutting surface 1221 of the stepped surface is not provided with a metal half ring, and only the lower abutting surface 1222 of the stepped portion is provided with a metal half ring 50. In this way, the grounding function when mated with the plug is satisfied, and the metal half ring is not provided. The upper butting surface 1221 provided with the metal half ring provides a good hand feeling.

The welding technology of the invention is not limited to the above-mentioned embodiments. It can also be used for welding metal shells and ground terminals, and can also be used in plug connectors, such as USB Type-C plug connectors, between the metal shielding plate and the ground terminal. Welding. Therefore, the electrical connector of the present invention includes an insulating body, conductive terminals and metal parts (such as the aforementioned metal plate, metal shell, metal half ring, etc.) carried in the insulating body. The insulating body includes a base and a butting portion. , The conductive terminal includes a contact portion extending to the mating portion and a pin extending out of the base portion, the conductive terminal includes a ground terminal, the ground terminal has a first welding portion, and the metal piece has a second welding portion; The first welding part and the second welding part are joined together by spot welding, and the welding surfaces of the first and second welding parts are both covered with solder.

Of course, it can also be applied to welding between the same materials, such as welding of power terminals in the upper and lower rows of conductive terminals in a USB Type-C socket connector, such as welding of a metal shell and a shielding plate in a USB Type-C plug connector. Expanded, an electrical connector includes an insulating body, a first metal piece and a second metal piece carried on the insulating body, the first metal piece has a first welding part, and the second metal piece has a second welding Section; The first welding part and the second welding part are joined together by spot welding, and the welding surfaces of the first and second welding parts are covered with solder.

In summary, this publication clearly meets the requirements of an invention patent, and Yan filed a patent application in accordance with the law. However, the above descriptions are only the preferred embodiments of the present invention, and the scope of rights of the present invention cannot be limited by this. All equivalent modifications or changes made by those with ordinary knowledge in the technical field based on the spirit of the present invention are still covered in the scope of the appended patent application.

20b: Lower row of conductive terminals

20G: Ground terminal

24: The first welding department

243: Spot Welding Shallow Groove

34: The second welding part

Claims (10)

An electrical connector includes an insulating body, a conductive terminal and a metal piece carried in the insulating body. The insulating body includes a base and a butting portion. The conductive terminal includes a contact portion that extends to the butting portion and a pin that extends out of the base. , The conductive terminal includes a ground terminal, the ground terminal has a first welding part, and the metal piece has a second welding part; wherein the first welding part and the second welding part are made of different metal materials The first welding part and the second welding part are joined together by laser spot welding, the welding surface of the second welding part is tin-plated and the solder climbs to the welding surface of the first welding part during the spot welding process, The welding surfaces of the first and second welding parts are both covered with solder. The electrical connector according to claim 1, wherein the conductive terminal is made of copper alloy, and the metal piece is made of stainless steel. The electrical connector according to claim 2, wherein the welding surface of the first welding portion of the ground terminal is plated with gold. The electrical connector according to claim 3, wherein the first welding portion has a spot welding shallow groove opposite to the back surface of the welding surface. The electrical connector according to any one of claims 1 to 4, wherein the mating portion is a mating tongue plate extending from the base, the mating tongue plate has opposite mating surfaces, and the contact portion of the conductive terminal Arranged on the butting surface of the butting tongue plate, the metal piece is a metal plate located in the butting tongue plate. The electrical connector according to claim 5, wherein the first welding portion extends laterally from the side surface of the ground terminal, and the second welding portion extends laterally from the side surface of the metal plate. The electrical connector according to claim 5, wherein the first welding part extends from the front end of the ground terminal, and the second welding part is located at the front end of the metal plate. The electrical connector according to any one of claims 1 to 4, wherein the conductive end The sub is a two-row structure, each row includes ground terminals aligned up and down with each other, the second welding part has two opposite welding surfaces, and the two first welding parts are respectively welded to the opposite welding surfaces of the second welding part. The electrical connector according to any one of claims 1 to 4, wherein the mating portion is a mating tongue extending from a base, the mating tongue has opposite mating surfaces, and the mating tongue is located adjacent to the base. A thickened step portion is provided, the metal piece is a metal half ring covering the step portion, and the second welding portion extends from both ends of the metal half ring. An electrical connector includes an insulating body, a first metal piece and a second metal piece carried on the insulating body, the first metal piece has a first welding portion, and the second metal piece has a second welding portion; wherein, The first welding part and the second welding part are made of different metal materials, the first welding part and the second welding part are joined together by laser spot welding, and the welding surface of the second welding part is tin-plated And during the spot welding process, the solder climbs to the welding surface of the first welding part, and the welding surfaces of the first and second welding parts are both covered with solder.

Images