An electrical connector

Abstract

The present invention discloses an electrical connector, wherein the outer shell and the inner shell use welding points and contoured rivet points to fix the gap of the iron shell, and the strength of the iron shell is increased by these two methods. The present invention includes an injection molded body and a terminal assembly fixed in the injection molded body, the injection molded body is embedded in the inner shell, the inner shell is inserted in the outer shell, the outer shell is arranged in the base, a receiving space is provided on the base, and the combination of the outer shell and the inner shell is embedded in the receiving space; a plurality of reverse bending feet are provided at one end of the outer shell close to the base, and the ends of the reverse bending feet are arranged away from the base; a reverse clamping pin is provided at one end of the inner shell facing the base, an anti-retraction clamping position is provided on the outer surface of the base, and the reverse clamping pin is embedded in the anti-retraction clamping position. The present invention adopts a reverse bending foot connection and an external rib structure design to increase the strength of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a reinforced protection structure of an upright Type C connector. Background Art

[0002] With the trend of lightweight and miniaturized electronic products, the requirements for product structure are increasing, and it is necessary to break through the existing framework limitations and continue to meet the requirements of product functional diversification. Among them, the height of flat network ports and ultra-thin connectors has almost reached the limit due to their own terminal forming process requirements.

[0003] In the conventional upright Type C connector structure, the iron shell gap is riveted using a single rivet point method, and the iron shell feet are not ribbed, resulting in a weak structure. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide an electrical connector, in which the outer shell and the inner shell (inner and outer iron shells) are welded together by spot welding, and the gaps in the iron shells are fixed by welding points and contour rivets (contact riveting plus spot welding), so that the strength of the iron shell is increased by these two methods; the injection molded insert IM does not fill the tongue (terminal carrier) position completely, leaving enough space and card points for the secondary mold closing OM to punch the glue, and the strength of the tongue is greatly improved.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An electrical connector, comprising an injection molded body and a terminal assembly fixed in the injection molded body, wherein the injection molded body is embedded in an inner shell, the inner shell is inserted in an outer shell, the outer shell is arranged in a base, an accommodating space is provided on the base, and a combination of the outer shell and the inner shell is embedded in the accommodating space;

[0007] A plurality of reverse bending legs are arranged at one end of the housing close to the base, and the ends of the reverse bending legs are arranged away from the base;

[0008] A reverse clamping pin is arranged at one end of the inner shell facing the base, an anti-retraction clamping position is arranged on the outer surface of the base, and the reverse clamping pin is embedded in the anti-retraction clamping position.

[0009] Furthermore, in some embodiments, an isolation plate is provided in the middle of the terminal assembly, a bent connection portion is provided at one end of the isolation plate facing the base, a spot welding position is provided at a position corresponding to the bent connection portion on the inner shell, and the inner shell is welded to the bent connection portion through the spot welding position.

[0010] Furthermore, in some embodiments, a group of terminal carriers are provided on both sides of the isolation sheet, and the terminal carriers are clamped and covered with the isolation sheet;

[0011] A guide hole is provided on the terminal carrier, and a guide piece matching the guide hole is provided on another corresponding terminal carrier;

[0012] A hollow position is provided on the terminal carrier, a bending angle is provided at a corner of the hollow position, and an inner convex step is provided on one side of the hollow position.

[0013] Furthermore, in some embodiments, a plurality of limiting grooves are provided on the isolation sheet, the limiting grooves are located in the hollow positions, and part of the colloid of the injection molding fills the hollow positions and the limiting grooves;

[0014] A fixed transverse plate is provided on the side of the base shell, and the fixed transverse plate fixes the welding end of the terminal assembly.

[0015] Furthermore, in some embodiments, a circuit board is provided at the open end of the base, a through installation opening is provided in the middle of the circuit board, and a plurality of through welding holes are provided on the outer side of the circuit board surrounding the installation opening; the end (welding portion) of the reverse bending foot away from the outer shell is passed through the welding hole.

[0016] Further, in some embodiments, the short sides on both sides of the shell end are respectively provided with second reverse bending feet; in other words, the short sides on both sides (symmetrically) of the shell end are respectively provided with second reverse bending feet;

[0017] A set of symmetrical first reverse bending legs is respectively provided on the long sides on both sides of the shell end; in other words, a set of first reverse bending legs is respectively provided on the (symmetrical) long sides on both sides of the shell end;

[0018] The welding parts of the first reverse bending leg and the second reverse bending leg are inserted into the welding hole, and the housing is fixed on the circuit board by welding the first reverse bending leg and the second reverse bending leg;

[0019] The first reverse bending leg and the second reverse bending leg are provided with convex ribs for increasing strength.

[0020] Furthermore, in some embodiments, reverse clamping pins are respectively provided on two symmetrical sides of the inner shell end; in other words, the reverse clamping pins are symmetrically arranged on two opposite sides of the inner shell end.

[0021] Furthermore, in some embodiments, the outer shell and the inner shell are respectively formed by riveting, and corresponding riveted connections are provided with contoured rivet points (contact riveting, similar to a trapezoidal card matching a trapezoidal card slot), and the riveted gaps of the outer shell and the inner shell are respectively spot welded by welding points.

[0022] Furthermore, in some embodiments, the terminal carrier is embedded and fixed in the injection molded body, and a concave positioning groove is provided at the outer end of the tail plate side wall of the injection molded body close to the base, and a concave limiting groove is provided at the inner end of the tail plate side wall of the injection molded body close to the base.

[0023] Furthermore, in some embodiments, an inner bending card is provided at the end of the inner shell close to the base, and the inner bending card is fixed by riveting with the corresponding positioning groove;

[0024] A plurality of inwardly concave top blocks are arranged at one end of the inner shell close to the base, and the inwardly concave top blocks are buckled with the corresponding limiting grooves.

[0025] The structure of the upright Type C connector of the present invention has the following advantages:

[0026] The present invention adopts the method of contour riveting points plus spot welding (welding points) to fix the gap of the outer shell (iron shell), and the strength of the iron shell is increased by combining the two methods;

[0027] The present invention adopts reverse bending feet (iron shell feet of the outer shell) for connection, the iron shell feet are reversely bent 180 degrees, and a convex rib structure design is added to increase the strength of the product;

[0028] The present invention adopts a reverse clamping pin (iron shell pin of the inner shell) to be reversely bent by 90° and an anti-retraction clamping position (card point anti-retraction) design to increase the structural strength;

[0029] The iron shell is welded to the isolation sheet by spot welding (spot welding position) on one side, and fixed to the molded body by riveting on the other side, which not only ensures the grounding effect but also improves the product strength;

[0030] The hollow position of the terminal carrier (tongue) is not flushed with glue during the injection molding of the insert IM (terminal carrier), but is filled in the secondary mold OM (secondary insert molding of the injection molded body), which increases the strength of the tongue. The hollow position of the terminal carrier (tongue) has C feet and steps, which facilitates the pulling of the injection molding insert IM during the secondary mold OM flushing, thereby increasing the strength of the tongue. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of an embodiment of the present invention;

[0032] Figure 2 It is a three-dimensional schematic diagram of a circuit board part of an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of a housing portion of an embodiment of the present invention;

[0034] Figure 4 is a cross-sectional schematic diagram of a circuit board portion of an embodiment of the present invention;

[0035] Figure 5 It is a schematic diagram of an exploded view of an embodiment of the present invention;

[0036] Figure 6 is a schematic diagram of a spacer portion of an embodiment of the present invention;

[0037] Figure 7 It is a three-dimensional schematic diagram of the outer shell part of an embodiment of the present invention;

[0038] Figure 8is a schematic diagram of a terminal carrier portion of an embodiment of the present invention;

[0039] Fig. 9 It is a cross-sectional schematic diagram of the injection molding part of an embodiment of the present invention;

[0040] Fig.10 is a three-dimensional schematic diagram of the inner shell part of an embodiment of the present invention;

[0041] Fig.11 It is an exploded schematic diagram of the terminal carrier part of an embodiment of the present invention;

[0042] Fig.12 It is a three-dimensional schematic diagram of the base part of an embodiment of the present invention.

[0043] Description of the markings in the figure:

[0044] Circuit board 11, base 12, fixed horizontal plate 13, terminal assembly 14, shell 15, first reverse bending foot 16, welding point 17, contour rivet point 18, second reverse bending foot 19, anti-retraction position 20, injection molding body 21, positioning groove 22, limiting groove 23, hollow position 24, inner shell 25, reverse card pin 26, inner bending card 27, inner concave top block 28, spot welding position 29, isolation sheet 31, terminal carrier 32, guide member 33, guide hole 34, inner convex step 35, convex rib 36, bending connection part 37, limiting slot 38, bending angle 39, installation port 41, welding hole 42, buckle part 44, connecting part 45, bending part 46, welding part 47. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0047] Please refer to the accompanying drawings. The present invention includes an injection molded body 21 and a terminal assembly 14 embedded in the injection molded body 21. The injection molded body 21 is embedded in the inner shell 25, the inner shell 25 is inserted in the outer shell 15, the outer shell 15 is arranged in the base 12, and a accommodating space is opened on the base 12. The combination of the outer shell 15 and the inner shell 25 is embedded in the accommodating space of the base 12, and a circuit board 11 is provided at the open end of the base 12.

[0048] A through installation opening 41 is provided in the middle of the circuit board 11, and a plurality of through welding holes 42 are provided on the outside of the circuit board 11 surrounding the installation opening 41;

[0049] A plurality of reverse bending legs are provided at one end of the housing 15 close to the base 12 , and the ends (welding portions 47 ) of the reverse bending legs away from the housing 15 are inserted into the welding holes 42 on the circuit board 11 .

[0050] Furthermore, in one embodiment, the reverse bending leg is formed integrally with the housing 15 by stamping and bending a metal sheet; the reverse bending leg (U-shaped reverse bending portion) includes a connecting portion 45 and a bending portion 46 approximately perpendicular to the connecting portion 45, the connecting portion 45 extends outward away from the opening end of the housing 15, and the bending portion 46 is provided with a welding portion 47 perpendicular to the bending portion 46 at one end away from the connecting portion 45, the welding portion 47 extends toward the housing 15, and the welding portion 47 is approximately parallel to the connecting portion 45. In this embodiment, see the attached Figure 7 As shown, the connecting portion 45 extends outward from the end of the housing 15, the bending portion 46 extends outward in the horizontal direction away from the housing 15, the welding portion 47 extends in the vertical direction away from the bending portion 46, the welding portion 47 is penetrated through the inner welding hole 42 of the circuit board 11, and the welding portion 47 is welded and fixed to the circuit board 11. In the embodiment of the present invention, the length of the welding portion 47 extending in the vertical direction is greater than the length of the connecting portion 45 extending in the vertical direction, and the length of the welding portion 47 extending in the vertical direction is greater than the length of the bending portion 46 extending in the horizontal direction. The first reverse bending leg 16 and the second reverse bending leg 19 both have the above design structure.

[0051] Furthermore, a second reverse bending foot 19 is provided on each of the short sides on both sides of the end of the shell 15. In other words, a second reverse bending foot 19 is provided on each of the (symmetrical) short sides on both sides of the end of the shell 15; a group of symmetrical first reverse bending feet 16 is provided on each of the long sides on both sides of the end of the shell 15. In other words, a group of first reverse bending feet 16 is provided on each of the (symmetrical) long sides on both sides of the end of the shell 15; the welding parts 47 of the first reverse bending feet 16 and the second reverse bending feet 19 are penetrated into the welding holes 42 of the circuit board 11, and the shell 15 is fixed to the circuit board 11 by welding the first reverse bending feet 16 and the second reverse bending feet 19; the first reverse bending feet 16 and the second reverse bending feet 19 are provided with convex ribs 36 for increasing strength.

[0052] A reverse clamping pin 26 is provided at one end of the inner shell 25 facing the base 12, and a reverse clamping pin 26 is provided on each of the two symmetrical sides of the end of the inner shell 25; an anti-retraction clamping position 20 corresponding to the reverse clamping pin 26 is provided on the side of the base 12 facing outward away from the circuit board 11, and the reverse clamping pin 26 of the inner shell 25 is embedded in the anti-retraction clamping position 20 on the outer surface of the base 12.

[0053] Furthermore, in one embodiment, the reverse clamping pin 26 is formed integrally with the inner shell 25 by stamping and bending a metal sheet; the reverse clamping pin 26 (L-shaped reverse bending portion) extends vertically outward away from the end of the inner shell 25, the reverse clamping pin 26 is parallel to the shell of the inner shell 25, and a buckle portion 44 perpendicular to the reverse clamping pin 26 is provided at one end of the reverse clamping pin 26 away from the inner shell 25. In this embodiment, see the attached Fig.10 As shown, the buckle portion 44 extends outwardly away from the inner shell 25 in a horizontal direction, and the buckle portion 44 is provided with a buckle that is engaged with the anti-retraction position 20 on the outer surface of the base 12 .

[0054] The outer shell 15 and the inner shell 25 are respectively riveted, and the riveted connection between the outer shell 15 and the inner shell 25 is provided with a contoured rivet point 18 (contact riveting, similar to a matching trapezoidal slot and trapezoidal card), and the riveted gaps of the outer shell 15 and the inner shell 25 are spot welded by welding points 17 respectively.

[0055] Furthermore, a spacer 31 is provided in the middle of the terminal assembly 14, and a bent connection portion 37 is provided at one end of the spacer 31 facing the base 12, and a spot welding position 29 is provided at a position corresponding to the bent connection portion 37 on the inner shell 25, and the inner shell 25 is spot welded to the bent connection portion 37 of the spacer 31 through the spot welding position 29;

[0056] A group of terminal carriers 32 are provided on both sides of the isolation sheet 31. The terminal carriers 32 are engaged and cover the isolation sheet 31. A guide hole 34 is opened on the terminal carrier 32. The corresponding other terminal carrier 32 is provided with a guide piece 33 matching the guide hole 34. A hollow position 24 is provided on the terminal carrier 32. A bending angle 39 (C-shaped angle) is provided at the corner of the hollow position 24 of the terminal carrier 32. An inner convex step 35 is provided on one side of the hollow position 24 of the terminal carrier 32.

[0057] The terminal carrier 32 is embedded and fixed in the injection molded body 21 . A concave positioning groove 22 is formed at the outer end of the tail plate side wall of the injection molded body 21 close to the base 12 . A concave limiting groove 23 is formed at the inner end of the tail plate side wall of the injection molded body 21 close to the base 12 .

[0058] Furthermore, an inward-bending card 27 is provided at the end of the inner shell 25 close to the base 12, and the position of the inward-bending card 27 corresponds to the position of the positioning groove 22. The inward-bending card 27 is fixed in the positioning groove 22 by riveting. A plurality of inward-concave top blocks 28 are provided at one end of the inner shell 25 close to the base 12. The inward-concave top blocks 28 of the inner shell 25 correspond to the position of the limiting groove 23 of the injection molding body 21, and the inward-concave top blocks 28 match and snap-fit ​​with the limiting groove 23 to limit the injection molding body 21 and the terminal carrier 32.

[0059] A plurality of limiting grooves 38 are formed on the isolation sheet 31 . The limiting grooves 38 are located in the hollow positions 24 of the terminal carrier 32 . Part of the colloid of the injection molding body 21 fills the hollow positions 24 and the limiting grooves 38 .

[0060] A fixed horizontal plate 13 is provided on the side of the housing of the base 12, and the fixed horizontal plate 13 fixes the welding end of the terminal assembly 14. Compared with the conventional upright Type C connector, the structural strength of the present invention is greater:

[0061] 1. The outer shell 15 and the inner shell 25 (inner and outer iron shells) are spot welded together, and the gaps of the iron shells are fixed by welding points 17 and contour riveting points 18 (contact riveting), see the attached Figure 7 , Fig.10 As shown, the strength of the iron shell is increased by these two methods; coupled with the reinforcement treatment of the riveting gap of the iron shell (profiled rivet points + spot welding), the strength of the iron shell is greatly improved.

[0062] 2. The housing 15 is fixed to the circuit board 11 by welding the first reverse bending leg 16 and the second reverse bending leg 19, and the convex rib 36 of the bending portion (U-shaped reverse bending portion) is designed. Figure 2 , Figure 7 As shown, the structural strength of the product is increased;

[0063] 3. The inner shell 25 is provided with a reverse clamping pin 26 (L-shaped reverse bending portion) which is embedded in the anti-retraction clamping position 20 of the base 12, and adopts the anti-retraction design of the clamping point, see the attached Figure 1 , Fig.12 As shown, the structural strength is increased; the inner shell 25 (inner iron shell) and the injection molded body 21 (rear plug) are designed by bending the iron shell feet 90° in the reverse direction (reverse clamping pin 26) and adding a clamping point anti-retraction design to increase the structural strength;

[0064] 4. The inner shell 25 is spot welded to the bent connecting portion 37 of the isolation sheet 31 through the spot welding position 29, see the attached Fig. 9 , Fig.10 As shown, the grounding effect is guaranteed;

[0065] 5. The inner bending card 27 (by riveting) at the end of the inner shell 25 abuts against the positioning groove 22 opened on the side wall of the tail plate of the injection molded body 21, see the attached Fig.10 , Fig.11 As shown, the product strength is improved;

[0066] 6. A hollow position 24 is provided on the terminal carrier 32. The terminal carrier 32 is provided with an inner convex step 35 and a bending angle 39 on the side of the hollow position 24. Figure 8 , Fig.11 As shown, the terminal carrier 32 is pulled when the injection molding body 21 is being injected;

[0067] 7. A plurality of limit slots 38 are provided on the isolation sheet 31. The limit slots 38 are located in the hollow positions 24 of the terminal carrier 32. The limit slots 38 are filled when the injection molding body 21 is being injected. Figure 6 , Figure 8 , Fig.11 As shown, the strength of the injection molded body 21 is increased.

[0068] The above detailed description includes reference to the accompanying drawings, which form a part of the detailed description. By way of illustration, the accompanying drawings show specific embodiments that can implement the present invention. These embodiments are also referred to as "examples" in this article. In addition to those elements shown and described, these examples can also include other elements. The inventors, either with respect to a specific example (or one or more aspects thereof) or with respect to other examples (or one or more aspects thereof) shown or described herein, also foresee examples of any combination or arrangement of the elements shown or described.

Claims

1. An electrical connector, comprising: An injection molded body (21) and a terminal assembly (14) fixed in the injection molded body (21), characterized in that the injection molded body (21) is embedded in an inner shell (25), the inner shell (25) is inserted in an outer shell (15), the outer shell (15) is arranged in a base (12), a receiving space is provided on the base (12), and a combination of the outer shell (15) and the inner shell (25) is embedded in the receiving space; A plurality of reverse bending feet are provided at one end of the housing (15) close to the base (12), and the ends of the reverse bending feet are arranged away from the base (12); The inner shell (25) is provided with a reverse clamping pin (26) at one end facing the base (12); an anti-retraction clamping position (20) is provided on the outer surface of the base (12); and the reverse clamping pin (26) is embedded in the anti-retraction clamping position (20); The reverse bending foot is formed integrally with the outer shell (15) by stamping and bending a metal sheet; the reverse bending foot has a U-shaped reverse bending portion, comprising a connecting portion (45) and a bending portion (46) approximately perpendicular to the connecting portion (45); the connecting portion (45) extends outward away from the opening end of the outer shell (15); an end of the bending portion (46) away from the connecting portion (45) is provided with a welding portion (47) perpendicular to the bending portion (46); the welding portion (47) extends toward the outer shell (15); and the welding portion (47) is approximately parallel to the connecting portion (45); The connecting portion (45) extends outward from the end of the housing (15), the bending portion (46) extends outward in a horizontal direction away from the housing (15), the welding portion (47) extends in a vertical direction away from the bending portion (46), the welding portion (47) is inserted into an inner welding hole (42) of the circuit board (11), and the welding portion (47) is fixed to the circuit board (11) by welding; The length of the welding portion (47) extending in the vertical direction is greater than the length of the connecting portion (45) extending in the vertical direction, and the length of the welding portion (47) extending in the vertical direction is greater than the length of the bending portion (46) extending in the horizontal direction.

2. An electrical connector according to claim 1, characterized in that: A reverse clamping pin (26) is respectively provided on two symmetrical sides of the end of the inner shell (25); The reverse clamping pin (26) is formed integrally with the inner shell (25) by stamping and bending a metal sheet on the inner shell (25); the reverse clamping pin (26) has an L-shaped reverse bending portion, the reverse clamping pin (26) extends vertically outward away from the end of the inner shell (25), the reverse clamping pin (26) is parallel to the shell of the inner shell (25), and one end of the reverse clamping pin (26) away from the inner shell (25) is provided with a buckle portion (44) perpendicular to the reverse clamping pin (26); The buckle portion (44) extends outwardly in a horizontal direction away from the inner shell (25), and the buckle portion (44) is provided with a buckle that is engaged and matched with the anti-retraction position (20) on the outer surface of the base (12).

3. An electrical connector according to claim 1, characterized in that: The circuit board (11) is provided at the open end of the base (12); a through installation opening (41) is provided in the middle of the circuit board (11); a plurality of through welding holes (42) are provided on the outside of the circuit board (11) surrounding the installation opening (41); the end of the reverse bending leg away from the housing (15) is inserted into the welding hole (42); A second reverse bending foot (19) is provided on each of the short sides on both sides of the end of the shell (15); A group of symmetrical first reverse bending legs (16) are respectively provided on the long sides on both sides of the end of the shell (15); The welding portions (47) of the first reverse bending leg (16) and the second reverse bending leg (19) are inserted into the welding hole (42), and the housing (15) is fixed to the circuit board (11) by welding the first reverse bending leg (16) and the second reverse bending leg (19); The first reverse bending leg (16) and the second reverse bending leg (19) are provided with convex ribs (36) for increasing strength.

4. An electrical connector according to claim 1, characterized in that: An isolation sheet (31) is provided in the middle of the terminal assembly (14); a bent connection portion (37) is provided at one end of the isolation sheet (31) facing the base (12); a spot welding position (29) is provided at a position on the inner shell (25) corresponding to the bent connection portion (37); and the inner shell (25) is welded to the bent connection portion (37) via the spot welding position (29); A group of terminal carriers (32) are provided on both sides of the isolation sheet (31), and the terminal carriers (32) are engaged and cover the isolation sheet (31); The terminal carrier (32) is provided with a guide hole (34), and another corresponding terminal carrier (32) is provided with a guide piece (33) matching the guide hole (34); The terminal carrier (32) is provided with a hollow position (24), a C-shaped bending angle (39) is provided at a corner of the hollow position (24), and an inner convex step (35) is provided on one side of the hollow position (24).

5. An electrical connector according to claim 4, characterized in that: The isolation sheet (31) is provided with a plurality of limiting grooves (38), the limiting grooves (38) are located in the hollow positions (24), and part of the colloid of the injection molded body (21) fills the hollow positions (24) and the limiting grooves (38); A fixed transverse plate (13) is provided on the side of the shell of the base (12), and the fixed transverse plate (13) fixes the welding end of the terminal assembly (14).

6. An electrical connector according to claim 1, characterized in that: The outer shell (15) and the inner shell (25) are respectively formed by riveting, and corresponding riveted joints are provided with contoured rivet points (18), and the riveted gaps of the outer shell (15) and the inner shell (25) are spot welded via welding points (17).

7. An electrical connector according to claim 4, characterized in that: The terminal carrier (32) is embedded and fixed in the injection molded body (21); a concave positioning groove (22) is provided at the outer end of the tail plate side wall of the injection molded body (21) close to the base (12); and a concave limiting groove (23) is provided at the inner end of the tail plate side wall of the injection molded body (21) close to the base (12).

8. An electrical connector according to claim 7, characterized in that: An inwardly curved card (27) is provided at the end of the inner shell (25) close to the base (12), and the inwardly curved card (27) is riveted and fixed to the corresponding positioning groove (22); A plurality of inwardly concave top blocks (28) are provided at one end of the inner shell (25) close to the base (12), and the inwardly concave top blocks (28) are buckled with the corresponding limiting grooves (23).

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