Electric connector

Abstract

The utility model discloses an electric connector. The electric connector comprises an insulating body; a plurality of terminals, wherein each terminal is provided with a welding part; the first shielding sheet and the second shielding sheet are respectively arranged on the upper side and the lower side of the insulating body, a plurality of first welding pins and a plurality of second welding pins are respectively arranged at the rear ends of the first shielding sheet and the second shielding sheet, and the first welding pins and the second welding pins are respectively arranged in front of and behind the welding parts; the metal shell group is arranged on the outer sides of the insulating body, the first shielding sheet and the second shielding sheet, a protruding part is arranged at the bottom of the metal shell group, and the protruding part is arranged in front of the second welding pins. And the protruding part, the plurality of welding parts, the plurality of first welding pins and the plurality of second welding pins are coplanar. Therefore, the electric connector provided by the utility model reduces the occupied space of the circuit board, and the terminal welding part is good in flatness.

Description

Technical Field

[0001] The utility model relates to an electric connector, in particular to an electric connector which reduces the occupied circuit board space and has a good flatness of the terminal welding part. Background Art

[0002] Among the types of electrical connectors commonly used in various electronic products, the connectors with Universal Serial Bus (USB) specifications are the most widely used. With the advancement of technology, there are more and more types of USB, such as USB 2.0, USB 3.0, Micro USB, Mini USB or USB TYPE-C. Among them, USB TYPE-C connectors have been widely used in various electronic products.

[0003] Chinese Patent Publication No. 211829412 discloses "a connector with improved anti-interference performance", including a metal shielding cover, a terminal seat and a metal shielding sheet; the terminal seat has a tongue plate contact area extending forward and a terminal welding area exposed at the bottom rear end; the metal shielding cover includes an inner shell and an outer shell; the outer shell has a left side plate, a right side plate and a rear side plate surrounding the terminal welding area, and the lower ends of the left side plate, the right side plate and the rear side plate are all provided with a first welding pin; the metal shielding sheet is located between the left side plate and the right side plate, and the metal shielding sheet, the inner shell and the outer shell are in contact and connected; the lower end of the metal shielding sheet is provided with a second welding pin, and the second welding pin and the first welding pin are arranged in a square shape around the terminal welding area.

[0004] However, the first welding pin and the second welding pin of the above-mentioned connector with improved anti-interference performance are welded on the circuit board using the traditional insertion method, which requires a larger circuit board space, and the lengths of the first welding pin, the second welding pin and the terminal welding area are inconsistent, resulting in poor flatness of the above-mentioned connector with improved anti-interference performance.

[0005] Therefore, it is necessary to provide an electrical connector that reduces the space occupied by a circuit board and has a good flatness of the terminal welding portion. Summary of the invention

[0006] The purpose of the utility model is to provide an electrical connector to address the defects and shortcomings of the prior art.

[0007] To achieve the above-mentioned purpose, the utility model discloses an electrical connector, comprising: an insulating body; a plurality of terminals, which are arranged in the insulating body, each of which is provided with a fixing portion fixed to the insulating body, a contact portion exposed at the front end of the insulating body, and a welding portion exposed at the rear end of the insulating body; a first shielding sheet, which is arranged on the upper side of the insulating body, the rear end of the first shielding sheet extends downward to form a plurality of first welding legs, the plurality of first welding legs are arranged behind the plurality of welding portions, and a first groove is formed between every two of the first welding legs; a second shielding sheet, which is arranged on the lower side of the insulating body, the second shielding sheet The rear end extends downward to form a plurality of second welding feet, and the plurality of second welding feet are arranged in front of the plurality of welding parts, and a second groove is formed between every two of the second welding feet. In the front and rear directions, the plurality of first welding feet correspond to the plurality of second welding feet, and the plurality of first grooves correspond to the plurality of second grooves; and a metal shell group is arranged on the outer sides of the insulating body, the first shielding sheet and the second shielding sheet, and a protruding portion is provided at the bottom of the metal shell group, and the protruding portion is arranged in front of the plurality of second welding feet, and the protruding portion, the plurality of welding parts, the plurality of first welding feet and the plurality of second welding feet form a coplanar surface.

[0008] As a further improvement, the rear end of the fixing portion is bent downward to form a bending portion, the lower end of the bending portion extends downward to form an extension portion, the lower end of the extension portion is bent backward and extends to form the welding portion, and the rear surface of the second welding leg corresponds to the front surface of the extension portion.

[0009] As a further improvement, the rear end of the first shielding sheet extends downward to form a rear plate portion, the front surface of the rear plate portion corresponds to the rear surface of the extending portion, one end of the rear plate portion extends backward to form a tail plate portion, one end of the tail plate portion extends downward to form a plurality of the first welding legs, and the front surfaces of the plurality of the first welding legs correspond to the rear end surface of the welding portion.

[0010] As a further improvement, the insulating body is fixed in an insulating shell, the metal shell group is fixed on the upper and lower sides of the insulating shell, the lower surface of the insulating shell extends downward to form a stopper, and the stopper is arranged in front of the second welding foot.

[0011] As a further improvement, the metal shell group is provided with an upper metal shell, which is fixed to the upper surface of the insulating shell, and is provided with an upper base plate, two upper side walls, two side wings, a connecting plate, an extension plate, a rear wall, and a notch. The left and right ends of the upper base plate are respectively bent downward and extended to form the upper side wall, and the lower ends of the two upper side walls are respectively bent outward and extended to form the side wing. The rear end of the upper base plate is bent downward and extended to form the connecting plate, and the bottom end of the connecting plate extends backward to form the extension plate. The rear end of the extension plate is bent downward and extended to form the rear wall. The rear wall is connected to the rear plate by spot welding, and the lower edge of the rear wall forms the notch. The tail plate and several of the first welding legs extend backward through the notch and expose the notch.

[0012] As a further improvement, the metal shell group is provided with a lower metal shell, the upper metal shell is fixed to the lower surface of the insulating shell, the lower metal shell is provided with a lower substrate, the protrusion, two lower side wall portions and two tail wing portions, the rear end of the lower substrate is bent downward and then extended backward to form the protrusion, the left and right ends of the lower substrate respectively extend backward to form the lower side wall portion, the lower side wall portion is spot-welded to the upper side wall portion, the lower side wall portion is bent inward and then extends to form the tail wing portion, the tail wing portion is spot-welded to the rear wall portion, and the stop portion is arranged between the second welding foot and the protrusion.

[0013] As a further improvement, a center piece is provided, and the left and right sides in the middle of the center piece protrude outward to form a transverse wing plate, and a first welding piece is provided on the left and right sides in the middle of the first shielding piece, and the first welding piece is arranged on the upper surface of the transverse wing plate, and a second welding piece is provided on the left and right sides in the middle of the second shielding piece, and the second welding piece is arranged on the lower surface of the transverse wing plate.

[0014] As a further improvement, an electrical connector is provided, comprising: an insulating body; a terminal group, arranged in the insulating body, the terminal group is provided with a plurality of terminals and an insulator, the plurality of terminals are fixedly arranged in the insulator, each of the terminals is provided with a fixing portion, the rear end of the fixing portion is bent downward to form an extension portion, and the lower end of the extension portion is bent backward to form a welding portion; a first shielding sheet, arranged on the upper side of the fixing portion, the rear end of the first shielding sheet is bent forward to form a rear plate portion, the front surface of the rear plate portion corresponds to the rear surface of the extension portion, and the rear plate The bottom end of the portion is bent downward to form a tail plate portion, the lower surface of the tail plate portion corresponds to the upper surface of the welding portion, the rear end of the tail plate portion is bent downward to form a plurality of first welding legs, the front surfaces of the first welding legs correspond to the rear end surface of the welding portion; and a second shielding sheet is arranged on the lower side of the fixing portion, the rear end of the second shielding sheet is bent downward to form a plurality of second welding legs, the rear surfaces of the second welding legs correspond to the front surface of the extending portion and the front end surface of the welding portion, the welding portion, the first welding legs and the second welding legs form a coplanar surface.

[0015] As described above, the utility model electrical connector adopts an innovative structural design, and the plurality of the first welding pins and the plurality of the second welding pins are respectively arranged in front of and behind the welding portion of the terminal group, so the utility model electrical connector has a good shielding effect to reduce electromagnetic interference. The first welding pin and the second welding pin and the welding portion of the terminal group are coplanar. Therefore, the utility model electrical connector can reduce the space occupied by the circuit board and the flatness of the terminal welding portion is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the electrical connector of the utility model.

[0017] Figure 2 This is a three-dimensional view of the electrical connector of the present invention from another angle.

[0018] Figure 3 It is a partial exploded view of the electrical connector of the present invention.

[0019] Figure 4 It is a partial exploded view of the electrical connector of the present invention.

[0020] Figure 5 This is an exploded view of the upper terminal set of the electrical connector of the present invention.

[0021] Figure 6 It is a three-dimensional diagram of the shielding sheet of the electrical connector of the utility model.

[0022] Figure 7 It is a three-dimensional diagram of the metal housing assembly of the electrical connector of the present invention.

[0023] The descriptions of the reference numerals in the figures are as follows.

[0024] Electrical connector 100 Insulation body 1

[0025] Main body 11 Step 12

[0026] Front base 13 Terminal group 2

[0027] Upper terminal group 21 Terminal 211

[0028] Insulator 212 Main body 2121

[0029] Connecting part 2122 Tongue part 2123

[0030] Positioning block 2124 Fixing portion 213

[0031] Contact portion 214 Bending portion 215

[0032] Extension portion 216 Welding portion 217

[0033] Lower terminal group 22 Center piece 3

[0034] Transverse wing plate 31 shielding sheet 4

[0035] First shielding sheet 41 First positioning hole 411

[0036] First welding piece 412 Rear plate portion 413

[0037] Tail plate portion 414 First welding leg 415

[0038] First groove 416 First slot 417

[0039] Second shielding sheet 42 Second welding sheet 422

[0040] Second welding leg 423 Second groove 424

[0041] Second slot 425 colloid 5

[0042] Insulation housing 6 Stopper 61

[0043] Metal housing group 7 Upper metal housing 71

[0044] Upper base plate 711 upper side wall portion 712

[0045] Side wing 713 Connecting plate 714

[0046] Extension plate 715 Rear wall portion 716

[0047] Notch 717 Positioning hole 718

[0048] Perforation 719 Lower metal shell 72

[0049] Lower base plate 721 protruding portion 722

[0050] Lower side wall portion 723 Tail wing portion 724

[0051] Metal insert 8. DETAILED DESCRIPTION

[0052] In order to explain the technical content, structural features, purpose and effect of the electrical connector 100 of the present invention in detail, the following examples are given and detailed descriptions are provided with accompanying drawings. In this embodiment, the electrical connector 100 of the present invention is a TYPE-C connector. In specific implementation, the electrical connector 100 of the present invention can also be other types of connectors.

[0053] See also Figures 1 to 4 The utility model electric connector 100 comprises an insulating body 1, a terminal group 2, a center piece 3, two shielding pieces 4, a colloid 5, an insulating shell 6, a metal shell group 7 and two metal plug-ins 8. The insulating body 1 covers the center piece 3 and the terminal group 2. The terminal group 2 is fixed in the insulating body 1. The center piece 3 is arranged in the middle of the terminal group 2 and is fixed in the insulating body 1. The two shielding pieces 4 are arranged on the upper and lower sides of the insulating body 1. The colloid 5 covers the rear end of the insulating body 1 and is arranged at the rear end of the insulating shell 6. The colloid 5 is used to fill the gap between the insulating shell 6 and the insulating body 1 to prevent water from flowing into the rear end of the utility model electric connector 100 and causing damage to the utility model electric connector 100. The insulating body 1 is fixed in the insulating shell 6. The metal shell group 7 is fixed on the upper and lower sides of the insulating shell 6. The metal shell group 7 is used for shielding interference and grounding. The two metal inserts 8 are respectively arranged on the left and right sides of the insulating shell 6 .

[0054] See also Figure 4 The insulating body 1 is provided with a main body 11, a stepped portion 12 and a front base 13. The front end of the main body 11 extends forward to form the stepped portion 12, and the front end of the stepped portion 12 extends forward to form the front base 13. The front base 13 covers the front end of the terminal set 2.

[0055] See also Figure 4 and Figure 5, the terminal group 2 is arranged in the insulating body 1. The terminal group 2 includes an upper terminal group 21 and a lower terminal group 22, and the center piece 3 is arranged between the upper terminal group 21 and the lower terminal group 22. The upper terminal group 21 and the lower terminal group 22 are respectively provided with a plurality of terminals 211 and an insulator 212, and the plurality of terminals 211 are fixed in the insulator 212.

[0056] Each of the terminals 211 is provided with a fixing portion 213, a contact portion 214, a bending portion 215, an extension portion 216 and a welding portion 217. The front end of the fixing portion 213 extends forward to form the contact portion 214, and the rear end of the fixing portion 213 is bent downward to form the bending portion 215. The lower end of the bending portion 215 extends downward to form the extension portion 216. The lower end of the extension portion 216 is bent backward and extends to form the welding portion 217.

[0057] The insulator 212 is provided with a main body 2121, a connecting portion 2122 and a tongue 2123. The front end of the main body 2121 extends forward to form the connecting portion 2122, and the front end of the connecting portion 2122 extends forward to form the tongue 2123. The fixing portion 213 is fixed in the main body 2121 and the connecting portion 2122 of the insulator 212 and is covered by the main body 2121 and the connecting portion 2122 of the insulator 212, the contact portion 214 is fixed in the tongue 2123 of the insulator 212, and the welding portion 217 extends out of the bottom of the main body 2121 of the insulator 212.

[0058] The main body 2121 of the insulator 212 is disposed in the main body 11 of the insulating body 1. The upper surface of the main body 2121 is provided with a plurality of positioning blocks 2124 extending upward. The positioning blocks 2124 are disposed in the main body 11 of the insulating body 1. The positioning blocks 2124 are fixed to the corresponding mechanism of the shielding sheet 4 to realize the positioning and fixing of the upper terminal set 21 and the shielding sheet 4.

[0059] In this embodiment, the structure of the lower terminal group 22 is substantially the same as that of the upper terminal group 21 , and will not be described in detail herein.

[0060] See also Figure 2 , Figure 4 and Figure 6, several shielding sheets 4 are provided with a first shielding sheet 41 and a second shielding sheet 42. The first shielding sheet 41 corresponds to the fixing portion 213 of the upper terminal group 21. The second shielding sheet 42 corresponds to the fixing portion 213 of the lower terminal group 22. The first shielding sheet 41 is provided with several positioning holes 411, two first welding sheets 412, a rear plate portion 413, a tail plate portion 414, several first welding legs 415, several first grooves 416 and at least one first slot 417. The first shielding sheet 41 is provided with several positioning holes 411 that penetrate the upper and lower surfaces of the first shielding sheet 41. The positioning blocks 2124 of the upper terminal group 21 are fixed to the several positioning holes 411 to achieve the positioning and fixing of the upper terminal group 21 and the shielding sheet 4. The first welding sheets 412 are respectively provided on the left and right sides of the middle of the first shielding sheet 41. The left and right sides of the middle of the center piece 3 protrude outward to form a transverse wing plate 31. The first welding piece 412 is welded to the upper surface of the transverse wing plate 31 of the center piece 3 to achieve the positioning and fixing of the shielding piece 4 and the center piece 3, so as to improve the crosstalk interference of the electrical connector 100 of the utility model. The rear end of the first shielding piece 41 extends downward to form the rear plate portion 413. The rear plate portion 413 corresponds to the extension portion 216 of the upper terminal group 21. One end of the rear plate portion 413 extends backward to form the tail plate portion 414. The tail plate portion 414 is used to avoid interference with the extension portion 216 and the welding portion 217 of the upper terminal group 21. One end of the tail plate portion 414 extends downward to form a plurality of the first welding legs 415. The first welding legs 415 are coplanar with the welding portion 217 of the terminal group 2. A concave first groove 416 is formed between every two first welding legs 415, and the design of the first groove 416 facilitates the consistency of the flatness of the first welding legs 415. The front end of the first shielding sheet 41 is exposed to the step portion 12 of the insulating body 1. In this embodiment, the first shielding sheet 41 is provided with two first slots 417. The first shielding sheet 41 is provided with two first slots 417 that penetrate the upper and lower surfaces of the first shielding sheet 41. When the electrical connector 100 of the utility model is sealed by glue application, the first slot 417 facilitates the glue flow.

[0061] The second shielding sheet 42 is provided with a plurality of positioning holes 411, two second welding pieces 422, a plurality of second welding legs 423, a plurality of second grooves 424 and at least one second slot 425. The second shielding sheet 42 is provided with a plurality of positioning holes 411 penetrating the upper and lower surfaces of the second shielding sheet 42. The positioning block 2124 of the lower terminal group 22 is fixed to the plurality of positioning holes 411 to achieve positioning and fixing of the lower terminal group 22 and the shielding sheet 4. The second welding pieces 422 are respectively provided on the left and right sides of the middle of the second shielding sheet 42. The second welding piece 422 is welded to the lower surface of the transverse wing plate 31 of the center sheet 3 to achieve positioning and fixing of the shielding sheet 4 and the center sheet 3, so as to improve the crosstalk interference of the electrical connector 100 of the utility model. The rear end of the second shielding sheet 42 extends downward to form a plurality of second welding legs 423. The second welding legs 423 correspond to the extension portion 216 of the lower terminal group 22. The second welding leg 423 is coplanar with the first welding leg 415 and the welding portion 217 of the terminal group 2. A recessed second groove 424 is formed between every two second welding legs 423, and the design of the second groove 424 facilitates the consistency of the flatness of several second welding legs 423. The front end of the second shielding sheet 42 is exposed at the stepped portion 12 of the insulating body 1. Several first welding legs 415 correspond to several second welding legs 423, and several first grooves 416 correspond to several second grooves 424. In this embodiment, the second shielding sheet 42 is provided with two second slots 425. The second shielding sheet 42 is provided with two second slots 425 that penetrate the upper and lower surfaces of the second shielding sheet 42. When the electrical connector 100 of the utility model is sealed by glue dispensing, the second slot 425 facilitates the flow of glue.

[0062] The first welding legs 415 and the second welding legs 423 are respectively arranged in front of and behind the welding portion 217 of the terminal group 2, so the electrical connector 100 of the utility model has a good shielding effect to reduce electromagnetic interference. In this embodiment, the first welding legs 415 and the second welding legs 423 are directly welded to a circuit board (not shown) through a surface mount technology (SMT) process during the assembly process. The specific implementation is not limited to this.

[0063] See also Figure 7, the metal shell group 7 is provided with an upper metal shell 71 and a lower metal shell 72. The upper metal shell 71 is fixed to the upper surface of the insulating shell 6, and the lower metal shell 72 is fixed to the lower surface of the insulating shell 6. In this embodiment, the upper metal shell 71 is connected to the lower metal shell 72 by spot welding. The upper metal shell 71 is provided with an upper base plate 711, two upper side walls 712, two side wings 713, a connecting plate 714, an extension plate 715, a rear wall 716, a notch 717, two positioning through holes 718 and a plurality of through holes 719. The left and right ends of the upper base plate 711 are respectively bent downward and extended to form the upper side wall 712, and the lower ends of the two upper side walls 712 are respectively bent outward and extended to form the side wings 713. The rear end of the upper base plate 711 is bent downward and extended to form the connecting plate 714. The bottom end of the connecting plate 714 extends backward to form the extension plate 715. The rear end of the extension plate 715 is bent downward and then extended to form the rear wall portion 716. The front surface of the rear wall portion 716 is spot-welded to the rear surface of the rear plate portion 413 of the first shielding sheet 41. The lower edge of the rear wall portion 716 forms the notch 717. The tail plate portion 414 of the first shielding sheet 41 and the first welding legs 415 extend backward through the notch 717 and expose the notch 717. Each of the side wing portions 713 is provided with a roughly circular positioning through-hole 718. The connection between the connecting plate 714 and the extension plate 715 is provided with a plurality of through-holes 719 that penetrate the surfaces of the connecting plate 714 and the extension plate 715. When the electrical connector 100 of the utility model is sealed by glue application, the plurality of through-holes 719 facilitate glue flow.

[0064] The lower metal shell 72 is provided with a lower substrate 721, a protruding portion 722, two lower side wall portions 723 and two tail wing portions 724. The rear end of the lower substrate 721 is bent downward and then extends backward to form the protruding portion 722. The protruding portion 722 is coplanar with the first welding leg 415 of the first shielding sheet 41, the second welding leg 423 of the second shielding sheet 42 and the welding portion 217 of the terminal group 2. The left and right ends of the lower substrate 721 extend backward to form the lower side wall portion 723 respectively. The lower side wall portion 723 is spot-welded to the upper side wall portion 712 of the upper metal shell 71. The rear end of the lower side wall portion 723 is bent inward and then extends to form the tail wing portion 724. The tail wing portion 724 is spot-welded to the rear wall portion 716 of the upper metal shell 71.

[0065] See also Figure 2The lower surface of the insulating shell 6 extends downward to form a stopper 61. The stopper 61 is disposed between the second welding leg 423 of the second shielding sheet 42 and the protruding portion 722 of the lower metal shell 72. The stopper 61 is used to prevent glue from flowing toward the protruding portion 722 of the lower metal shell 72.

[0066] As mentioned above, the utility model electrical connector 100 has an innovative structural design, and the first plurality of welding legs 415 and the second plurality of welding legs 423 are respectively arranged in front of and behind the welding portion 217 of the terminal set 2, so the utility model electrical connector 100 has a good shielding effect to reduce electromagnetic interference. The first welding leg 415 and the second welding leg 423 are coplanar with the welding portion 217 of the terminal set 2. Therefore, the utility model electrical connector 100 can reduce the space occupied by the circuit board and the flatness of the terminal welding portion is good.

Claims

1. An electrical connector, characterized in that: include: An insulating body; a plurality of terminals, arranged in the insulating body, each of the terminals is provided with a fixing portion fixed to the insulating body, a contact portion exposed at the front end of the insulating body, and a welding portion exposed at the rear end of the insulating body; a first shielding sheet, arranged on the upper side of the insulating body, the rear end of the first shielding sheet extends downward to form a plurality of first welding legs, the plurality of first welding legs are arranged behind the plurality of welding portions, and a first groove is formed between every two of the first welding legs; a second shielding sheet, arranged on the lower side of the insulating body, the rear end of the second shielding sheet extends downward to form a plurality of second welding legs A pin, several of the second welding legs are arranged in front of several of the welding parts, a second groove is formed between every two of the second welding legs, in the front and rear directions, several of the first welding legs correspond to several of the second welding legs, and several of the first grooves correspond to several of the second grooves; and a metal shell group is arranged on the outer sides of the insulating body, the first shielding sheet and the second shielding sheet, a protruding portion is provided at the bottom of the metal shell group, the protruding portion is arranged in front of several of the second welding legs, and the protruding portion, several of the welding parts, several of the first welding legs and several of the second welding legs form a coplanar surface.

2. The electrical connector according to claim 1, wherein: The rear end of the fixing portion is bent downward to form a bent portion, the lower end of the bent portion is extended downward to form an extended portion, the lower end of the extended portion is bent backward and extended to form the welding portion, and the rear surface of the second welding leg corresponds to the front surface of the extended portion.

3. The electrical connector according to claim 2, wherein: The rear end of the first shielding sheet extends downward to form a rear plate portion, the front surface of the rear plate portion corresponds to the rear surface of the extending portion, one end of the rear plate portion extends backward to form a tail plate portion, one end of the tail plate portion extends downward to form a plurality of the first welding legs, and the front surfaces of the plurality of the first welding legs correspond to the rear end surface of the welding portion.

4. The electrical connector according to claim 3, wherein: The insulating body is fixed in an insulating shell, the metal shell group is fixed on the upper and lower sides of the insulating shell, the lower surface of the insulating shell extends downward to form a stopper, and the stopper is arranged in front of the second welding foot.

5. The electrical connector according to claim 4, wherein: The metal shell group is provided with an upper metal shell, and the upper metal shell is fixed to the upper surface of the insulating shell. The upper metal shell is provided with an upper base plate, two upper side walls, two side wings, a connecting plate, an extension plate, a rear wall, and a notch. The left and right ends of the upper base plate are respectively bent downward and extended to form the upper side wall, and the lower ends of the two upper side walls are respectively bent outward and extended to form the side wing. The rear end of the upper base plate is bent downward and extended to form the connecting plate, and the bottom end of the connecting plate extends backward to form the extension plate. The rear end of the extension plate is bent downward and extended to form the rear wall. The rear wall is connected to the rear plate by spot welding, and the lower edge of the rear wall forms the notch. The tail plate and several of the first welding legs extend backward through the notch and are exposed outside the notch.

6. The electrical connector according to claim 5, wherein: The metal shell group is provided with a lower metal shell, the upper metal shell is fixed to the lower surface of the insulating shell, the lower metal shell is provided with a lower substrate, the protruding portion, two lower side wall portions and two tail wing portions, the rear end of the lower substrate is bent downward and then extended backward to form the protruding portion, the left and right ends of the lower substrate are respectively extended backward to form the lower side wall portion, the lower side wall portion is spot-welded to the upper side wall portion, the lower side wall portion is bent inward and then extends to form the tail wing portion, the tail wing portion is spot-welded to the rear wall portion, and the stop portion is arranged between the second welding foot and the protruding portion.

7. The electrical connector according to claim 1, wherein: A center piece is also provided, and the left and right sides of the middle of the center piece protrude outward to form a transverse wing plate. A first welding piece is provided on the left and right sides of the middle of the first shielding piece, and the first welding piece is arranged on the upper surface of the transverse wing plate. A second welding piece is provided on the left and right sides of the middle of the second shielding piece, and the second welding piece is arranged on the lower surface of the transverse wing plate.

8. An electrical connector, characterized in that: include: An insulating body; a terminal group, arranged in the insulating body, the terminal group is provided with a plurality of terminals and an insulating body, the plurality of terminals are fixedly arranged in the insulating body, each of the terminals is provided with a fixing portion, the rear end of the fixing portion is bent downward to form an extension portion, and the lower end of the extension portion is bent backward to form a welding portion; a first shielding sheet, arranged on the upper side of the fixing portion, the rear end of the first shielding sheet is bent forward to form a rear plate portion, the front surface of the rear plate portion corresponds to the rear surface of the extension portion, the bottom end of the rear plate portion is bent forward to form a tail plate portion, the lower surface of the tail plate portion corresponds to the upper surface of the welding portion, the rear end of the tail plate portion is bent downward to form a plurality of first welding legs, and the front surfaces of the plurality of first welding legs correspond to the rear end surface of the welding portion; and a second shielding sheet, arranged on the lower side of the fixing portion, the rear end of the second shielding sheet is bent downward to form a plurality of second welding legs, the rear surfaces of the plurality of second welding legs correspond to the front surface of the extension portion and the front end surface of the welding portion, and the welding portion, the plurality of first welding legs and the plurality of second welding legs form a coplanar surface.

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