Socket connector

Abstract

The utility model discloses a socket connector, and the connector comprises a terminal assembly which is provided with an insulating body and a plurality of signal terminals; the insulating body comprises a first insulating part, a second insulating part and an outer wrapping insulating part; the first insulating part comprises a first base part and a first lingual plate formed by forward extension of the first base part, and the second insulating body comprises a second base part and a second lingual plate formed by forward extension of the second base part; the first base part and the second base part are stacked in the vertical direction; the first tongue plate and the second tongue plate are stacked up and down; a plurality of implanting grooves which are opened towards the front end and extend in the front-back direction are formed between the first tongue plate and the second tongue plate, and the rear ends of the implanting grooves are communicated in the left-right direction to form communicating grooves; and the outer wrapping insulating part is combined on the first insulating part and the second insulating part through integral forming, and a reinforcing part filled in the implanting groove and the communicating groove is formed on the outer wrapping insulating part.

Description

Technical Field

[0001] The present application relates to the field of electrical connectors, and in particular to a socket connector. Background Art

[0002] With the development of new technologies such as cloud computing and big data, electrical connectors have become widely used as a means of transmitting digital, audio, and image signals. The DP (Display Port) connector is one such connector, primarily used to connect video sources to devices such as monitors, and supports the transmission of audio, USB, and other data.

[0003] The existing DP connector mainly consists of a metal shell, an insulating body, and several signal terminals. In some special use scenarios, an insulating shell needs to be fixed around the metal shell. The several signal terminals include an upper row of signal terminals and a lower row of signal terminals.

[0004] In the conventional manufacturing process for the insulator body and signal terminals, several signal terminals are assembled into the insulator body through insertion. This production process often results in terminals not being properly inserted, bending, deflecting, or loosening. Another manufacturing process involves integrally injection molding the signal terminals and the insulator body. However, due to the large number of signal terminals, multiple injection molding processes can lead to insecure bonding between the modules. If the process is performed in a single injection molding process, positioning holes left by the positioning terminals will be formed, thus affecting the overall performance and robustness of the electrical connector.

[0005] In addition, the assembly and connection methods between the metal shell, the insulating body and the metal shell are also different. There are assembly tolerances in the assembly and coordination between multiple original parts. It is often the case that the signal terminal position is not accurate after the finished connector is soldered to the electronic device.

[0006] How to design a connector solution that is simple to assemble, easy to mass produce, has a stable finished connector structure, and can be accurately positioned and assembled to the docking circuit board has always been a long-standing issue in the industry. Utility Model Content

[0007] The object of the present application is to provide a socket connector having a terminal assembly with a stable overall structure.

[0008] To achieve the above objectives, this application provides the following technical solutions:

[0009] A socket connector, comprising:

[0010] The terminal assembly is formed with an insulating body and a plurality of signal terminals fixed in the insulating body; the insulating body includes a base and a tongue plate extending forward from the front end of the base;

[0011] A metal shell is fixed around the periphery of the base and defines together with the terminal assembly an insertion space open to the front end;

[0012] The insulating body includes a first insulating member, a second insulating member and an outer insulating member;

[0013] The signal terminals include an upper row of terminals arranged in a left-right direction and fixed to the first insulating member and a lower row of terminals arranged in a left-right direction and fixed to the second insulating member;

[0014] The first insulating member includes a first base and a first tongue extending forward from the front end of the first base, and the second insulating body includes a second base and a second tongue extending forward from the front end of the second base;

[0015] The first base and the second base are stacked in an up-down direction to form an inner base;

[0016] The first tongue plate and the second tongue plate are stacked in the up-down direction to form a tongue base;

[0017] A plurality of implantation grooves are formed between the first tongue plate and the second tongue plate, the plurality of implantation grooves are open to the front end and extend in the front-to-back direction, and the rear ends of the plurality of implantation grooves are connected in the left-right direction to form a connecting groove;

[0018] The outer insulating part is combined with the inner base and the tongue base by integral molding, and the outer insulating part is formed with a reinforcement part filled in the implantation groove and the communication groove.

[0019] Furthermore, a plurality of fixing grooves are formed between the first base and the second base, the fixing grooves being open to the rear end and extending in the front-to-back direction, and the front ends of the plurality of fixing grooves are connected in the left-right direction to form a connecting groove;

[0020] The front end of the fixing groove or the connecting groove is further extended in the up-down direction to form an extension groove;

[0021] The outer insulating member is formed with a reinforcement portion filled into the fixing groove, the connecting groove and the extending groove.

[0022] Furthermore, a fixing post is formed protruding from one end of the first base portion facing the second base portion in the left-right direction, and a receiving hole is formed on the second base portion corresponding to the position of the fixing post and extending vertically therethrough, and the fixing post is implanted in the receiving hole and has an interference fit therewith;

[0023] A positioning column is formed on the surface of the second base facing the first base at one end away from the accommodating hole in the left and right directions, and a mounting hole is formed on the first base corresponding to the position of the positioning column and passes through in the up and down directions. The positioning column is implanted in the mounting hole and has an interference fit with the mounting hole.

[0024] Furthermore, the outer insulating member covers the upper surface, lower surface, left and right side surfaces and rear end surface of the inner base, and the outer insulating member also covers at least a portion of the front end surface of the inner base;

[0025] The outer insulating member covers the left and right side surfaces and the front end surface of the tongue base.

[0026] Furthermore, first extension portions are respectively extended outwardly along the left and right directions on both sides of the first tongue plate, the thickness of the first extension portions along the up and down directions is smaller than that of the first tongue plate, and the first tongue plate and the first extension portions form a step shape;

[0027] A second extension portion is respectively extended outwardly along the left and right directions on both sides of the second tongue plate, the thickness of the second extension portion in the up-down direction is smaller than that of the second tongue plate, and the second tongue plate and the second extension portion form a step shape;

[0028] The first extension portion and the second extension portion extend into the outer insulating component and are covered and surrounded by the outer insulating component.

[0029] Furthermore, the first extension portion and the second extension portion located on the same side are staggered along the front-to-back direction.

[0030] Furthermore, the metal shell includes a top plate and a bottom plate that are spaced apart and arranged correspondingly along the up-down direction, and two side plates that integrally connect the left and right end edges of the top plate and the bottom plate respectively;

[0031] An anti-reverse insertion guide foot is formed at the connection position between the top plate and one of the side plates;

[0032] The base portion is matched with the anti-reverse insertion guide foot portion to form a chamfered notch portion and a stop chamfered surface facing the front end;

[0033] The rear end edge of the anti-reverse insertion guide foot is arranged corresponding to the stop guide angle surface along the front-to-back direction;

[0034] The anti-reverse insertion guide foot extends along the entire length of the insertion space in the front-to-back direction.

[0035] Furthermore, the outer peripheral surface of the base forms an upper surface and a lower surface opposite to each other along the up-down direction and two side surfaces opposite to each other along the left-right direction;

[0036] The upper surface is correspondingly attached to the inner surface of the top plate; the lower surface is correspondingly attached to the inner surface of the bottom plate, and the two side surfaces are correspondingly attached to the inner surfaces of the two side plates;

[0037] Side bosses are formed on the left and right sides of the rear end edges of the upper and lower surfaces of the base, and each of the side bosses has a front end stop surface facing the front end.

[0038] The front end stop surface is coplanar with the stop chamfer surface and is located behind the front end surface of the base;

[0039] The rear end edge of the metal shell is in contact with the front end stop surface and / or the stop chamfer surface.

[0040] Furthermore, each signal terminal in the upper row of terminals includes a first fixing section fixed to the first base portion, a first contact section extending forward from the first fixing section and fixed in the first tongue plate, and a first docking section extending backward from the first fixing section and protruding out of the first base portion;

[0041] Each signal terminal in the lower row of terminals includes a second fixing section fixed to the second base portion, a second contact section extending forward from the second fixing section and fixed in the second tongue plate, and a second docking section extending backward from the second fixing section and protruding out of the second base portion;

[0042] Each of the first contact segment and the second contact segment further includes a buried segment formed by further extending forward from the corresponding front end edge. The buried segment is correspondingly buried and implanted in the outer insulating component, and the front end edge of the buried segment is exposed forward from the front end edge of the outer insulating component.

[0043] Compared with the prior art, the beneficial effect of the present application is that the overall structure of the terminal assembly of the socket connector is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a three-dimensional schematic diagram of the socket connector of this application.

[0045] Figure 2 yes Figure 1 FIG. 1 is a perspective diagram of the socket connector viewed from another angle.

[0046] Figure 3 yes Figure 2 The partially exploded perspective view of the socket connector shown in the figure specifically shows a perspective schematic diagram after the insulating shell and the metal shell are separated from the terminal assembly.

[0047] Figure 4 yes Figure 3 A three-dimensional diagram from another angle.

[0048] Figure 5yes Figure 2 The partially exploded perspective view of the socket connector shown in the figure specifically shows a perspective schematic diagram of the terminal assembly after being separated from the metal shell assembled with the insulating shell.

[0049] Figure 6 yes Figure 2 The partially exploded perspective view of the socket connector shown in the figure specifically shows a perspective schematic diagram after the insulating shell is separated from the metal shell assembled with the terminal assembly.

[0050] Figure 7 It is a partial exploded perspective view of the terminal assembly of the present application, specifically showing a perspective schematic diagram of the outer insulating member after being separated from the first insulating member combined with the upper row of terminals and the second insulating member combined with the lower row of terminals.

[0051] Figure 8 It is a three-dimensional schematic diagram of a first insulating member combined with an upper row of terminals and a second insulating member combined with a lower row of terminals when they are separated from each other. DETAILED DESCRIPTION

[0052] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0053] In the description of this application, it should be understood that the terms "include" and "have" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0054] In addition, for the accuracy of the description of the entire application, all directions involved in the entire application should be referred to as Figure 1 For reference, the X-axis is defined as the left-right direction; the Y-axis is defined as the up-down direction, with the positive direction of the Y-axis being upward; and the Z-axis is defined as the front-to-back direction (i.e., the direction of docking with the docking connector).

[0055] Please refer to Figures 1 to 8 As shown, the receptacle connector of the present application includes a terminal assembly 1, a metal housing 2 fixedly disposed around the terminal assembly 1, and an insulating housing 8 fixedly disposed around the metal housing 2. The metal housing 2 and the terminal assembly 1 together define a mating space open to the front end. The mating space is used to insert a mating connector (not shown).

[0056] The terminal assembly 1 includes an insulating body 11 and a plurality of signal terminals 12 fixed within the insulating body 11. The insulating body 11 forms a base 111 and a tongue 112 extending forward from the front end of the base 111. The metal housing 2 is circumferentially fixed to the periphery of the base 111. Specifically, the insulating body 11 includes a first insulating member 5, a second insulating member 6, and an outer insulating member 7. The signal terminals 12 include an upper row of terminals 1201, arranged in a left-right direction and integrally fixed to the first insulating member 5, and a lower row of terminals 1202, integrally fixed to the second insulating member 6. The first insulating member 5 includes a first base 51 and a first tongue 52 extending forward from the front end of the first base 51. The second insulating body 6 includes a second base 61 and a second tongue 62 extending forward from the front end of the second base 61. The first base 51 and the second base 61 are stacked vertically and together form an inner base (not numbered). The first tongue plate 52 and the second tongue plate 62 are stacked in the up-down direction and together form a tongue base (not numbered).

[0057] The outer insulating part 7 is fixedly coupled to the inner base and the tongue base by integral molding. In a preferred embodiment, a plurality of implantation grooves 561 are formed between the first tongue plate 52 and the second tongue plate 62, which are open to the front end and extend in the front-to-back direction. The rear ends of the plurality of implantation grooves 561 are connected in the left-right direction to form a connecting groove 562. Preferably, the outer insulating part 7 covers the upper surface, lower surface, left and right side surfaces and rear end surface of the inner base. In addition, the outer insulating part 7 also covers the front end surface of the inner base except for the areas where the first tongue plate 52 and the second tongue plate 62 are formed. The outer insulating part 7 covers the left and right side surfaces and the front end surface of the tongue base. Preferably, the outer insulating part 7 also includes a reinforcement portion (not shown) filled into the implantation groove 561 and the connecting groove 562. The reinforcement portion can enhance the bonding force between the first insulating part 5 and the second insulating part 6.

[0058] Furthermore, a plurality of fixing grooves 563 are formed between the first base 51 and the second base 61, which are open to the rear end and extend in the front-to-back direction. The front ends of the plurality of fixing grooves 563 are connected in the left-right direction to form connecting grooves 564. The front ends of the fixing grooves 563 and / or the connecting grooves 564 are further extended in the up-down direction to form extension grooves 565. The outer insulating member 7 is formed with a reinforcement portion (not shown) filled into the fixing grooves 563, the connecting grooves 564 and the extension grooves 565 to enhance the bonding force between the first insulating member 5 and the second insulating member 6. In a preferred embodiment, the implantation grooves 561, the connecting grooves 562, the fixing grooves 563, the connecting grooves 564 and the extension grooves 565 are formed on the two surfaces where the first insulating member 5 and the second insulating member 6 are bonded to each other. Please refer to Figure 7 and Figure 8 As shown, a fixing post (not numbered, similar in structure to the positioning post 602 described below) is formed protruding from one end of the surface of the first base 51 facing the second base 61 in the left-right direction. A receiving hole 601 extending vertically is formed in the second base 61 at a position corresponding to the fixing post 501. The fixing post 501 is implanted in the receiving hole 601 and has an interference fit with the receiving hole 601. A positioning post 602 is formed protruding from one end of the surface of the second base 61 facing the first base 51, away from the receiving hole 601 in the left-right direction. A mounting hole 502 extending vertically is formed in the first base 51 at a position corresponding to the positioning post 602. The positioning post 602 is implanted in the mounting hole 502 and has an interference fit with the mounting hole 502. In this way, the first insulating member 5 and the second insulating member 6 can be pre-assembled and positioned before the outer insulating member 7 is formed by integral injection molding.

[0059] Please refer to Figure 7 and Figure 8As shown, first extensions 521 extend outwardly from each side of the first tongue plate 52 in the left-right direction. These extensions 521 are thinner than the first tongue plate 52 in the vertical direction, forming a step-like structure with the first tongue plate 52. Second extensions 621 extend outwardly from each side of the second tongue plate 62 in the left-right direction. These second extensions 621 are thinner than the second tongue plate 62 in the vertical direction, forming a step-like structure with the second tongue plate 62. The first and second extensions 521, 621 extend into and are covered by the outer insulating member 7. In a preferred embodiment, the first and second extensions 521, 621 on the same side are offset in the left-right direction to form a step-like structure. In other preferred embodiments, the first and second extensions 521, 621 on the same side are offset in the front-to-back direction (not shown in the drawings). In this way, the first insulating member 5 , the second insulating member 6 and the outer insulating member 7 can be more tightly bonded and more firmly fixed.

[0060] The receptacle connector described herein may actually be a DP (Display Port) receptacle connector, equipped with twenty signal terminals 12: ten upper-row terminals 1201 and ten lower-row terminals 1202. Each signal terminal 12 in the upper-row terminals 1201 includes a first fixing segment 121 fixed to the first base 51, a first contact segment 122 extending forward from the first fixing segment 121 and fixed within the first tongue 52, and a first mating segment 123 extending rearward from the first fixing segment and protruding beyond the first base 51. The structure of each signal terminal 12 in the lower-row terminals 1202 is substantially the same as that of the signal terminals 12 in the upper-row terminals 1201. Specifically, each signal terminal 12 in the lower-row terminals 1202 includes a second fixing segment (unnumbered) fixed to the second base 61, a second contact segment (unnumbered) extending forward from the second fixing segment and fixed within the second tongue 62, and a second mating segment (unnumbered) extending rearward from the second fixing segment and protruding beyond the second base 61. Each of the first contact segment 121 and the second contact segment further includes a buried segment 120 formed by further extending forward from the corresponding front end edge. The buried segment 120 is correspondingly buried and implanted in the outer insulating part 7, and the front end edge of the buried segment 120 is exposed forward from the front end edge of the outer insulating part 7.

[0061] The insulating housing 8 is surrounded by an insulating wall 81 in an annular shape and defines a hollow mounting cavity 80 with two open ends. The metal housing 2 is surrounded by a metal wall 21 in an annular shape and defines a hollow accommodating cavity 20 with two open ends. The metal housing 2 is inserted backward from the front end of the insulating housing 8 into the mounting cavity 80 and assembled. The terminal assembly 1 is inserted forward from the rear end of the metal housing 2 into the accommodating cavity 20 and assembled.

[0062] Specifically, the metal wall 21 includes a top plate 2101 and a bottom plate 2102 spaced apart in corresponding arrangement along the vertical direction, and two side plates 2103 integrally connecting the left and right edges of the top and bottom plates 2101 and 2102, respectively. The insulating wall 81 includes a top wall 811 and a bottom wall 812 spaced apart in corresponding arrangement along the vertical direction, and two side walls 813 integrally connecting the left and right edges of the top and bottom plates 811 and 812, respectively. In this embodiment of the present application, at least one stop protrusion 814 is formed at the rear end edge of the inner wall surfaces of the top wall 811, the bottom wall 812, and the two side walls 813. The rear end edges of the top plate 2101, the bottom plate 2102, and the side plates 2103 define a limit portion 210. When the metal housing 2 is inserted backward from the front end of the insulating housing 8 and assembled into the mounting cavity 80, the limit portion 210 of the metal wall 21 stops rearward at the stop protrusion 814.

[0063] Please refer to Figures 3 to 7 As shown, further, the rear end of the base 111 is integrally formed with multiple reference portions 3. The reference portion 3 includes a rear boss portion 31 that protrudes rearward to the rear end face 1110 of the base 111 and a side boss portion 32 that protrudes in a transverse direction perpendicular to the front-to-back direction to the outside of the outer peripheral surface 1111 of the base 111. The rear end face of the rear boss portion 31 forms a mounting reference surface 311. The side boss portion 32 is formed with a front end stop surface 321 facing the front end. When the terminal assembly 1 is inserted forward from the rear end of the metal shell 2 and assembled into the accommodating cavity 20, the front end stop surface 321 stops correspondingly at the rear end face 810 of the insulating shell 8. The outer peripheral surface 1111 of the base 111 includes an upper surface 1112 and a lower surface 1113 that are opposite in the up-down direction, and two side surfaces 1114 that are opposite in the left-right direction. The upper surface 1112 is correspondingly attached to the inner surface of the top plate 2101. The lower surface 1113 is correspondingly fitted to the inner surface of the bottom plate 2102. The two side surfaces 1114 are correspondingly fitted to the inner surfaces of the two side plates 2103. In a preferred embodiment, two side bosses 32 are provided at the rear end edge of the upper surface 1112 of the base 111. The two side bosses 32 are correspondingly located near the left and right sides of the upper surface 1112. Two side bosses 32 are provided at the rear end edge of the lower surface 1112 of the base 111. The two side bosses 32 are correspondingly located near the left and right sides of the lower surface 1112.

[0064] In a preferred embodiment, upper bearing portions 33 are formed on the left and right sides of the upper surface 1112 of the base 111. The upper bearing portion 33 is formed with a front upper bearing surface 331 facing the front end. Lower bearing portions 34 are formed on the left and right sides of the lower surface 1112 of the base 111. The lower bearing portion 34 is formed with a front lower bearing surface 341 facing the front end. The front upper bearing surface 331 and the front lower bearing surface 341 are respectively arranged in correspondence with the rear end edges of the top wall 811 and the bottom wall 812 in the front-to-back direction, thereby serving as secondary auxiliary positioning structures when the terminal assembly 1 and the metal shell 2 are assembled with each other. Furthermore, the two side boss portions 32 located at the rear end edge of the upper surface 1112 of the base 111 protrude upward from the upper bearing portion 33. The two side boss portions 32 located at the rear end edge of the lower surface 1113 of the base 111 protrude downward from the lower bearing portion 34.

[0065] Please refer to Figures 3 to 5 As shown, an anti-reverse plug-in guide foot 2104 is formed at the connection position between the top plate 2101 and one of the side plates 2103. The base 111 is matched with the position of the anti-reverse plug-in guide foot 2104 to form a chamfered notch 1115 and a stop chamfered surface 1116 facing the front end. The rear end edge of the anti-reverse plug-in guide foot 2104 is arranged corresponding to the stop chamfered surface 1116 in the front-to-back direction. The anti-reverse plug-in guide foot 2104 extends along the full length of the insertion space in the front-to-back direction. The front end stop surface 321 is coplanar with the stop chamfered surface 1116 and is located behind the front end surface 1110 of the base 111. The rear end edge of the metal shell 2 is correspondingly abutted against the front end stop surface 321 and the stop chamfered surface 1116.

[0066] Furthermore, the rear end edge of the metal wall 21 is bent along the transverse direction to form a metal bending portion 201, specifically, the rear end edges of the two side panels 2103 are bent along the left and right directions to form the metal bending portion 201. When the terminal assembly 1 is inserted forward from the rear end of the metal shell 2 and assembled into the accommodating cavity 20, the metal bending portion 201 is snapped onto the rear end surface 1110 of the base 111. The metal wall 21 also extends backward to form a plurality of welding pins 211. When the socket connector is installed on a circuit substrate (not shown, it can be an independent PCB circuit board or a substrate inside an electronic device), the mounting reference surface 311 of the rear boss portion 31 is stopped and abutted against the surface of the circuit substrate, and the plurality of welding pins 211 and the docking section 123 of the signal terminal 12 are electrically connected to the circuit substrate. By using the mounting reference surface 311 as the reference surface for assembling the receptacle connector to the circuit substrate, the positions of the plurality of signal terminals 12 can be precisely controlled after the receptacle connector is assembled to the circuit substrate. In a preferred embodiment, a slight gap can be pre-set between the mating section 123 of the signal terminal 12 and the surface of the circuit substrate. This gap can be fixed by solder filling, and the mounting reference surface is formed solely by the abutment of the mounting reference surface 311 with the surface of the circuit substrate, further ensuring precise and controllable assembly. Furthermore, assembly between the insulating housing 8, metal housing 2, and terminal assembly 1 is also more convenient, and the mutual retention is stable and reliable.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0068] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A socket connector, characterized in that: include: The terminal assembly is formed with an insulating body and a plurality of signal terminals fixed in the insulating body; the insulating body includes a base and a tongue plate extending forward from the front end of the base; A metal shell is fixed around the periphery of the base and defines together with the terminal assembly an insertion space open to the front end; The insulating body includes a first insulating member, a second insulating member and an outer insulating member; The signal terminals include an upper row of terminals arranged in a left-right direction and fixed to the first insulating member and a lower row of terminals arranged in a left-right direction and fixed to the second insulating member; The first insulating member includes a first base and a first tongue formed by extending forward from the front end of the first base, and the second insulating member includes a second base and a second tongue formed by extending forward from the front end of the second base; The first base and the second base are stacked in an up-down direction to form an inner base; The first tongue plate and the second tongue plate are stacked in the up-down direction to form a tongue base; A plurality of implantation grooves are formed between the first tongue plate and the second tongue plate, the plurality of implantation grooves are open to the front end and extend in the front-to-back direction, and the rear ends of the plurality of implantation grooves are connected in the left-right direction to form a connecting groove; The outer insulating part is combined with the inner base and the tongue base by integral molding, and the outer insulating part is formed with a reinforcement part filled in the implantation groove and the communication groove.

2. The socket connector according to claim 1, wherein: A plurality of fixing grooves are formed between the first base and the second base, the fixing grooves being open to the rear end and extending in the front-to-back direction, and the front ends of the plurality of fixing grooves are connected in the left-right direction to form a connecting groove; The front end of the fixing groove or the connecting groove is further extended in the up-down direction to form an extension groove; The outer insulating member is formed with a reinforcement portion filled into the fixing groove, the connecting groove and the extending groove.

3. The socket connector according to claim 1, wherein: A fixing post is formed protruding from a surface of the first base portion facing the second base portion at one end in the left-right direction, and a receiving hole is formed on the second base portion corresponding to the position of the fixing post and extending through the second base portion in the up-down direction. The fixing post is inserted into the receiving hole and has an interference fit with the receiving hole. A positioning column is formed on the surface of the second base facing the first base at one end away from the accommodating hole in the left and right directions, and a mounting hole is formed on the first base corresponding to the position of the positioning column and passes through in the up and down directions. The positioning column is implanted in the mounting hole and has an interference fit with the mounting hole.

4. The socket connector according to claim 1, wherein: The outer insulating member covers the upper surface, lower surface, left and right side surfaces and rear end surface of the inner base, and the outer insulating member also covers at least a portion of the front end surface of the inner base; The outer insulating member covers the left and right side surfaces and the front end surface of the tongue base.

5. The socket connector according to claim 1, wherein: A first extension portion is respectively extended outwardly along the left and right directions on both sides of the first tongue plate, the thickness of the first extension portion in the up-down direction is smaller than that of the first tongue plate, and the first tongue plate and the first extension portion form a step shape; A second extension portion is respectively extended outwardly along the left and right directions on both sides of the second tongue plate, the thickness of the second extension portion in the up-down direction is smaller than that of the second tongue plate, and the second tongue plate and the second extension portion form a step shape; The first extension portion and the second extension portion extend into the outer insulating component and are covered and surrounded by the outer insulating component.

6. The socket connector according to claim 5, wherein: The first extension portion and the second extension portion located on the same side are staggered along the front-to-back direction.

7. The socket connector according to claim 1, wherein: The metal shell includes a top plate and a bottom plate that are spaced apart and arranged correspondingly along the up-down direction, and two side plates that integrally connect the left and right end edges of the top plate and the bottom plate respectively; An anti-reverse insertion guide foot is formed at the connection position between the top plate and one of the side plates; The base portion is matched with the anti-reverse insertion guide foot portion to form a chamfered notch portion and a stop chamfered surface facing the front end; The rear end edge of the anti-reverse insertion guide foot is arranged corresponding to the stop guide angle surface along the front-to-back direction; The anti-reverse insertion guide foot extends along the entire length of the insertion space in the front-to-back direction.

8. The socket connector according to claim 7, wherein: The outer peripheral surface of the base portion forms an upper surface and a lower surface opposite to each other along the vertical direction and two side surfaces opposite to each other along the left and right directions; The upper surface is correspondingly attached to the inner surface of the top plate; the lower surface is correspondingly attached to the inner surface of the bottom plate, and the two side surfaces are correspondingly attached to the inner surfaces of the two side plates; Side bosses are formed on the left and right sides of the rear end edges of the upper and lower surfaces of the base, and each of the side bosses has a front end stop surface facing the front end. The front end stop surface is coplanar with the stop chamfer surface and is located behind the front end surface of the base; The rear end edge of the metal shell is in contact with the front end stop surface and / or the stop chamfer surface.

9. The socket connector according to claim 4, wherein: Each signal terminal in the upper row of terminals includes a first fixing section fixed to the first base, a first contact section extending forward from the first fixing section and fixed in the first tongue plate, and a first docking section extending backward from the first fixing section and protruding out of the first base; Each signal terminal in the lower row of terminals includes a second fixing section fixed to the second base portion, a second contact section extending forward from the second fixing section and fixed in the second tongue plate, and a second docking section extending backward from the second fixing section and protruding out of the second base portion; Each of the first contact segment and the second contact segment further includes a buried segment formed by further extending forward from the corresponding front end edge. The buried segment is correspondingly buried and implanted in the outer insulating component, and the front end edge of the buried segment is exposed forward from the front end edge of the outer insulating component.

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