Socket electrical connector

Abstract

A socket electrical connector, comprising: a terminal module comprising an insulator on which a tongue plate part is formed, and a plurality of terminals bonded into the insulator; a metal shell surrounding the periphery of the terminal module, wherein the metal shell and the terminal module jointly define an annular mating space, an insertion opening is formed in one end of the annular mating space, and each terminal comprises a fixed section part buried in the insulator, a contact section part exposed from the tongue plate part, and a mating section part extending backwards out of the insulator; and an elastic piece shell attached to the inner surface of the metal shell to form the mating space position, wherein a mating elastic piece elastically protruding into the mating space is formed on the elastic piece shell and extends from the elastic piece shell, and at least the part of the metal shell that forms the mating space is annular and seamless. Thus, better electromagnetic shielding, grounding and waterproofing effects are achieved.

Description

A socket electrical connector

[0001] This application claims priority to a Chinese patent application filed on July 31, 2023, with application number 202310949244.3 and invention name “A socket electrical connector”, the contents of which are incorporated by reference into this application.

[0002] This application claims priority to a Chinese patent application filed on August 16, 2023, with application number 202322200067.7 and invention name “A socket electrical connector”, the contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to a socket electrical connector. Background Art

[0004] On August 11, 2014, the USB Association announced a new type of electrical connector. Its receptacle allows for insertion of a plug connector in both forward and reverse directions. This receptacle is capable of transmitting USB 2.0, USB 3.0, and USB 3.1 signals. This connector, named the USB Type C connector, has been widely adopted in consumer electronics, particularly smartphones, laptops, and tablets. Existing USB Type C receptacles for connecting to circuit boards come in either a full-pin configuration (24 conductive terminals) for USB 3.0 or 3.1 transmission or a reduced-pin configuration (e.g., 16 conductive terminals or other configurations) for USB 2.0 transmission. However, both full-pin and reduced-pin configurations place higher demands on the receptacle connector's electromagnetic shielding, grounding, and waterproofing performance.

[0005] Please refer to Chinese Utility Model Patent Publication CN215184840U, which discloses a pin-missing structure for a USB Type C receptacle connector. The structure features two metal shells, both of which are stamped and bent parts. This creates a seam between the shells, which compromises the overall structural strength of the receptacle connector, hinders waterproofing, and affects electromagnetic shielding and grounding.

[0006] In addition, please refer to Chinese Utility Model Patent Publication CN214254924U, which also discloses a pin-less structure for a USB Type C receptacle electrical connector. This design also features two metal shells: a stamped / stretched inner shell with a seamless surface, and a stamped / bent outer shell with a surface seam. However, the active lap spring structure is difficult to form on this drawn / stretched inner shell, increasing manufacturing difficulty and cost. The lap spring is primarily used to achieve enhanced electromagnetic shielding and grounding between the male and female connectors.

[0007] Therefore, it is necessary to develop a new socket electrical connector to solve the above technical problems.

[0008] Summary of the Invention

[0009] The purpose of this application is to provide a socket electrical connector with better electromagnetic shielding, grounding and waterproof effects.

[0010] A socket electrical connector, comprising:

[0011] The terminal module includes an insulator having a tongue portion and a plurality of terminals coupled to the insulator;

[0012] The metal shell is arranged around the terminal module, and the metal shell and the terminal module together define a ring-shaped docking space and form an insertion port at one end;

[0013] Each of the terminals comprises a fixed section embedded in the insulator, a contact section exposed from the tongue portion, and a docking section extending backward out of the insulator;

[0014] The shrapnel shell is fitted on the inner surface of the metal shell to form a docking space, and the shrapnel shell extends to form a docking shrapnel that elastically protrudes into the docking space; wherein,

[0015] At least the portion of the metal shell forming the docking space is annular and has no seams.

[0016] Preferably, the shrapnel shell is annular in shape, and is attached to the inner surface of the metal shell to form a docking space and is fixed to the metal shell by welding.

[0017] Preferably, a seam is formed on the shrapnel shell.

[0018] Preferably, the docking spring piece is formed with an insertion guide section and an extraction guide section connected to each other, and the insertion guide section is closer to the insertion port than the extraction guide section;

[0019] One end of the insertion guide section is integrally connected to the shrapnel shell and extends inwardly and rearwardly;

[0020] One end of the extraction guide section is integrally connected to the insertion guide section and extends outwardly and rearwardly in an inclined manner.

[0021] Preferably, the free end edge of the extraction guide section extends outward beyond the interface formed by the inner surface of the shrapnel shell.

[0022] Preferably, a stop portion is formed on the inner surface of the metal shell forming the docking space, and the shrapnel shell stops rearward at the stop portion.

[0023] Preferably, the insulator further comprises a base, and the tongue portion is formed by extending forward from the base;

[0024] The metal shell includes a contracted tube section arranged around the periphery of the base and an expanded tube section formed by further extending forward from the contracted tube section;

[0025] A step-shaped stop portion is formed at the connection between the shrinking tube section and the expanding tube section, and the shrapnel shell is fitted to the inner surface of the expanding tube section and stops rearward at the stop portion.

[0026] Preferably, the inner surface of the shrapnel shell is flush with the inner surface of the shrink tube section.

[0027] Preferably, the stop portion is located at the connection between the base portion and the tongue plate portion along the front-to-back direction.

[0028] Preferably, the shrapnel shell extends forward beyond the metal shell;

[0029] The front end edge of the metal shell is turned outward and extended to form a skirt portion;

[0030] The waterproof ring is sleeved on the periphery of the front end of the shrapnel shell and stops at the skirt portion rearward.

[0031] Preferably, the socket electrical connector complies with the USB TYPE C interface standard.

[0032] Preferably, the middle plate is embedded and fixed in the tongue portion of the insulator, and the middle plate is exposed from both ends of the tongue portion in the width direction to form snap-fit ​​positions, and the snap-fit ​​positions are used to snap-fit ​​with the docking connector;

[0033] The butt joint piece is embedded and fixed in the insulator and is fixed to the rear end of the middle plate piece by welding. The butt joint piece extends backward out of the insulator and is formed with a butt joint foot.

[0034] Preferably, the rear end of the middle plate is stacked and fitted with the docking member in the up-down direction.

[0035] Preferably, two middle plates are provided, and the two middle plates are respectively embedded and fixed at both ends of the tongue plate portion in the width direction.

[0036] Preferably, two butt joints are provided and are independent of each other, and the two butt joints are respectively embedded and fixed at both ends of the insulator in the width direction.

[0037] Preferably, any one of the docking parts includes a welding portion and a bending portion formed by the welding portion extending along the width direction of the tongue portion toward the side where the other docking part is located, the welding portion is welded and fixed to the middle plate, and the bending portion is welded and fixed to the metal shell.

[0038] Preferably, the bending portion includes a connecting section formed by bending the welding portion upward / downward along the width direction of the tongue portion away from the edge of one side of the other mating part, and a transverse section formed by extending the connecting section along the width direction of the tongue portion toward the side where the other mating part is located, at least part of the surface of the transverse section is exposed outside the insulator and is attached to the inner surface of the metal shell and fixed by welding.

[0039] Preferably, the plurality of terminals include at least two grounding terminals, and the two grounding terminals are respectively in electrical contact with the middle plate.

[0040] Preferably, the docking foot is formed by extending rearward from the rear end edge of the connecting section.

[0041] Preferably, the insulator is formed with a base and a tongue portion extending forward from the base, and the bent portion is correspondingly embedded and fixed in the base.

[0042] Compared with the prior art, the present invention has the following beneficial effects: better electromagnetic shielding, grounding and waterproofing effects.

[0043] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0045] FIG1 is a perspective schematic diagram of a first embodiment of the electrical socket connector of the present application.

[0046] FIG. 2 is a perspective schematic diagram of the electrical receptacle connector shown in FIG. 1 viewed from another angle.

[0047] FIG3 is a front view of the first embodiment of the socket connector of the present application.

[0048] FIG. 4 is a cross-sectional view taken along line AA in FIG. 3 .

[0049] FIG5 is an exploded perspective view of the first embodiment of the electrical receptacle connector of the present application.

[0050] FIG6 is a modified embodiment of the combination of the spring shell and the metal shell of the first embodiment of the socket connector of the present application.

[0051] FIG. 7 is a perspective schematic diagram of a second embodiment of the electrical socket connector of the present application.

[0052] FIG8 is a partial exploded perspective view of the second embodiment of the electrical receptacle connector of the present application.

[0053] FIG. 9 is a perspective exploded view of a terminal module of the second embodiment of the electrical receptacle connector of the present application.

[0054] FIG10 is a perspective schematic diagram of the terminals, the middle plate and the mating member of the second embodiment of the socket electrical connector of the present application.

[0055] FIG11 is a top view of the second embodiment of the electrical receptacle connector of the present application.

[0056] FIG12 is a cross-sectional view taken along line AA in FIG11 .

[0057] FIG13 is a perspective schematic diagram of the middle plate and the mating member of the second embodiment of the socket electrical connector of the present application when connected to the material strip.

[0058] FIG14 is a perspective view of the second embodiment of the socket electrical connector of the present application when the mating piece is removed from the material strip and then welded to the middle plate.

[0059] FIG15 is a schematic diagram showing the mating position relationship between the middle plate member combined with the mating member and the terminal strip of the second embodiment of the socket electrical connector of the present application. DETAILED DESCRIPTION

[0060] 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.

[0061] For the accuracy of the description of the entire application, in the first embodiment shown in Figures 1 to 6, all directions involved shall refer to Figure 1, wherein: the direction of the X-axis is defined as the left-right direction (that is, the width direction); the direction of the Y-axis is defined as the up-down direction (that is, the thickness direction); the direction of the Z-axis is defined as the front-back direction, wherein the positive direction of the Z-axis is the back.

[0062] Please refer to Figures 1 to 5, which are a socket electrical connector disclosed in the present application, including a terminal module 1, a metal shell 2, a shrapnel shell 3, and an assembly shell 7. The terminal module 1 includes an insulator 11 and a plurality of terminals 12 combined in the insulator 11. The insulator 11 is formed by injection molding of an insulating material, and includes a base 112 and a tongue portion 111 formed by extending forward from the base 112. Each of the terminals 12 includes a fixed section 121 embedded in the insulator 11, a contact section 122 exposed from the upper / lower surface of the tongue portion 111, and a docking section 123 extending backward from the insulator 11. The contact section 122 is used to dock with a docking connector (not shown), and the docking section 123 is fixed to a docking circuit board (not shown, for example, it can be a motherboard inside an electronic device) by welding.

[0063] Please refer to Figures 3 to 5. The metal shell 2 is formed by drawing / stretching a metal tube, and there is no seam on the surface of the metal shell 2. The metal shell 2 is arranged around the periphery of the terminal module 1. The metal shell 2 and the terminal module 1 together define an annular docking space 10 and form an insertion port 101 at one end. Specifically, the metal shell 2 includes a shrinking tube section 201 arranged around the periphery of the base 112 and an expanding tube section 202 formed by further extending forward from the shrinking tube section 201. The cross-section of the expanding tube section 202 is larger than the shrinking tube section 201, and a step-shaped stop portion 21 is formed at the connection between the shrinking tube section 201 and the expanding tube section 202. The shrapnel shell 3 is attached to the inner surface of the expanding tube section 202 and stops backward at the stop portion 21. The stop portion 21 is used to stop the shrapnel shell 3 when it is assembled and implanted into the metal shell 2. In one embodiment, the shrapnel shell 3 and the metal shell 2 are fixed together by welding.

[0064] Referring to Figures 4 and 5 , in one embodiment, the shrapnel housing 3 is formed into a ring shape by stamping and bending a metal sheet, with a seam 30 formed on one side. A docking spring 31 is formed extending from the shrapnel housing 3. The docking spring 31 elastically protrudes into the docking space 10 and is configured to elastically overlap with the docking connector to achieve electromagnetic shielding and grounding. Forming the docking spring 31 on the shrapnel housing 3, which is formed by stamping and bending a metal sheet, is relatively easy, requiring minimal processing effort and resulting in low manufacturing costs.

[0065] Specifically, the docking spring 31 is formed with an interconnected insertion guide section 311 and a removal guide section 312. The insertion guide section 311 is closer to the insertion port 101 than the removal guide section 312. One end of the insertion guide section 311 is integrally connected to the spring housing 3 and extends inward (into the docking space 10) and obliquely rearward. One end of the removal guide section 312 is integrally connected to the insertion guide section 311 and extends outward and obliquely rearward. Furthermore, the free end edge of the removal guide section 312 extends outward beyond the interface formed by the inner surface 301 of the spring housing 3. This makes insertion and removal of the docking connector smoother and prevents damage to the docking spring 31.

[0066] Please refer to Figures 4 and 5 , the inner surface of the shrapnel shell 3 is flush with the inner surface of the shrink tube section 201. The stop portion 21 is located at the connection between the base 112 and the tongue portion 111 along the front-to-back direction, so as to facilitate the assembly of the terminal module 1. Furthermore, the shrapnel shell 3 extends forward beyond the metal shell 2, and the front edge of the metal shell 2 extends outward to form a skirt portion 22. A waterproof ring 4 is sleeved on the outer periphery of the front end of the shrapnel shell 3 and stops at the skirt portion 22 backward. The waterproof ring 4 is used to achieve sealing and waterproofing between the socket electrical connector and the housing of the electronic device.

[0067] Furthermore, in order to achieve a better waterproof effect, a waterproof reserved area (marked) is formed at the rear end of the insulating body. The preset positions of all terminals 12 are exposed in the waterproof reserved area. The waterproof reserved area is filled with a waterproof filling portion 6. The waterproof filling portion 6 waterproofs the joint gap between the rear end of the terminal 12 and the insulator 11, and at the same time, waterproofs the joint gap between the rear end of the terminal module 1 and the metal shell 2. The seamless metal shell 2 has good shielding and waterproof performance, and also has better structural strength. The socket electrical connector in this application complies with the USB TYPE C interface standard.

[0068] Furthermore, the assembly shell 7 of the socket connector of the present application is covered on top of the metal shell 2 and fixed to the metal shell 2 by welding. The assembly shell 7 is extended on the left and right sides to form assembly ears 71, and the assembly ears 71 are used to achieve assembly and fixation with the docking circuit board.

[0069] In another embodiment (not shown), the metal shell 2 can be designed to be a straight barrel with both ends penetrated and the cross-section at each position being equal, without providing the shrinking tube section 201 and the expanding tube section 202 structure, that is, without providing the stepped stop portion 21. In this embodiment, the shrapnel shell 3 is fitted to the inner surface of the metal shell 2 to form the docking space 10 position, and stops rearward at the front end surface of the base 112.

[0070] Referring to FIG. 6 , in another embodiment, the shrapnel shell 3 can be designed to be smaller than the embodiment shown in FIG. 1 to FIG. 5 of the specification, that is, the shrapnel shell 3 can be designed to be simply flat and sheet-like. The shrapnel shell 3 can then be welded to the inner upper surface and / or inner lower surface of the metal shell 2 at the location where the docking space 10 is formed, achieving the same effect. In this embodiment, the shrapnel shell 3 does not need to be designed with a contracting tube section 201 and an expanding tube section 202. It is only necessary to form an outward depression (pit) at the location where the shrapnel shell 3 is attached to accommodate the shrapnel shell 3. Of course, in this embodiment, the inner surface of the shrapnel shell 3 is also designed to be flush with the inner surface of the metal shell 2 forming the docking space 10. The docking shrapnel 31 formed on the shrapnel shell 3 in the embodiment of FIG. 6 has the same structure as the embodiment shown in FIG. 1 to FIG. 5 .

[0071] For the accuracy of the description of the entire application, in the second embodiment shown in Figures 7 to 15, all directions involved shall refer to Figure 7, where: the direction of the X-axis is defined as the width direction (that is, the left-right direction); the direction of the Y-axis is defined as the up-down direction (that is, the thickness direction); the direction of the Z-axis is defined as the front-to-back direction, where the positive direction of the Z-axis is the back.

[0072] Please refer to Figures 7 to 15 , which illustrate a socket electrical connector disclosed in the present application. The socket electrical connector includes a live terminal module 1' and a metal housing 2'. The metal housing 2' surrounds the terminal module 1' and together with the terminal module 1' define an annular docking space 101' and an insertion port 102' at one end. The terminal module 1' includes an insulator 11', a plurality of terminals 12' incorporated into the insulator 11', two mid-plates 3' (two embodiments are included here, one of which is completely independent and unconnected; the other is that the two mid-plates 3' are integrally connected via a connecting piece, for example, the two mid-plates 3' can be integrally connected via a connecting piece similar to the connecting piece 5' in Figure 13 ), and two independent docking pieces 4'. The insulator 11' is formed with a base 111 and a tongue portion 112' extending forward from the base 111'.

[0073] Referring to Figures 8 to 10 , each terminal 12' includes a fixed segment 121' embedded within the insulator 11', a contact segment 122' exposed from the tongue portion 112', and a docking segment 123' extending rearwardly from the insulator 11'. The contact segment 122' is used to contact a docking connector (not shown) inserted into the docking space 101' to achieve signal transmission, and the docking segment 123' is used to electrically connect to a docking circuit board (not shown) within the electronic device. The receptacle electrical connector of the present application complies with the USB TYPE C interface standard (this refers to the docking frame shape of the receptacle electrical connector, not the number of terminals 12'). Of course, the number of terminals 12' does not necessarily need to be full pin (i.e., the standard USB TYPE C interface with 24 terminals). The receptacle electrical connector of the present application has a total of eight terminals 12', two of which are ground terminals (unnumbered) and six are signal terminals (unnumbered).

[0074] Referring to Figures 8 to 10 , the middle plate 3' is further embedded and fixed within the tongue portion 112' of the insulator 11'. The middle plate 3' is exposed from both ends of the tongue portion 112' in the width direction, forming snap-fit ​​positions 31' for snapping with the docking connector inserted into the docking space 101'. The two grounding terminals are located at both ends of the tongue portion 112' in the width direction and electrically contact the two middle plate 3' components, respectively. The six signal terminals are arranged along the width direction and located between the two grounding terminals.

[0075] Referring to Figures 8 to 10 , the mating member 4' is embedded and fixed within the insulator 11' and welded to the rear end of the middle plate 3'. The mating member 4' extends rearward from the insulator 11' and forms a mating foot 41'. Specifically, each of the mating members 4' includes a welding portion 40' and a bent portion 42' extending from the welding portion 40' along the width of the tongue portion 112' toward the side of the other mating member 4'. The welding portion 40' is welded to the middle plate 3', and the bent portion 42' is welded to the metal housing 2'. Wherein, the bending portion 42' includes a connecting section 421' formed by bending the welding portion 40' upward / downward along the width direction of the tongue portion 112' away from the side edge of the other docking piece 4', and a transverse section 422' formed by extending the connecting section 421' along the width direction of the tongue portion 112' toward the side where the other docking piece 4' is located, at least part of the surface of the transverse section 422' is exposed outside the insulator 11' and is attached to the inner surface of the metal shell 2' and fixed by welding. The docking foot 41' is formed by extending backward from the rear end edge of the connecting section 421'. Wherein, the bending portion 42' is correspondingly embedded and fixed in the base 111'. Preferably, the rear end position of the middle plate 3 is stacked and attached to the docking piece 4 in the up and down directions and then fixed as a whole by welding.

[0076] In the present application, the bending portions 42' of the two docking members 4' are both bent and extended upward. Of course, in other embodiments, they can also be designed to extend one upward and the other downward, or in other embodiments, the same docking member 4' can be bent and extended to form two bending portions 42', one of which extends upward and the other extends downward.

[0077] With reference to Figures 13 to 15 , during mass production of the socket electrical connector of the present application, the middle plate 3' and the mating member 4' are stamped from the same metal raw material sheet. As shown in Figure 7 , at this time, the rear of one middle plate 3' is integrally connected to one mating member 4', two adjacent mating members 4' are integrally connected by a connecting member 5', and the front ends of two adjacent middle plates 3' are integrally connected to the material strip 6'. In addition, the inner edges of the two mating members 4' integrally connected by the same connecting member 5' are bent upward and in the width direction (transverse direction) to form a bent portion 42'. This maximizes the utilization rate of the metal raw material sheet. When the middle plate 3' and the mating member 4' are fully unfolded, the bent portion 42' utilizes the portion of the metal raw material sheet 4' that is stamped between the two mating members 4' integrally connected by the same connecting member 5', significantly reducing the width of the metal raw material sheet occupied in the width direction (transverse direction).

[0078] As shown in FIG14 , the docking piece 4' is cut and separated from the middle plate 3' and adjusted in position before being fixed to the middle plate 3' by welding. At this time, the bent portions 42' of the docking piece 4' on the middle plate 3' extend upward and toward each other from the two ends (outer end side edges) of the corresponding welding portion 40' in the width direction. This arrangement allows the initial extension position of the bent portion 42' to be located at both ends of the tongue portion 112' in the width direction, reducing the impact of the bent portion 42' on the adjacent signal terminal 12'. At the same time, it ensures that the transverse section 422' has a sufficient extension length, ensuring a sufficiently long welding position and stable retention with the metal shell 2'. In the present application, the free end of the transverse section 422' is further bent downward to form an implantation section 423'. The implantation section 423' is correspondingly implanted and buried in the base 111' of the insulator 11', thereby increasing the retention stability between the bent portion 42' and the insulator 11'. Finally, the middle plate 3 ′, the docking member 4 ′ and the terminal 12 ′ shown in FIG. 9 are integrally formed into a terminal module 1 ′ through multiple injection molding.

[0079] The socket electrical connector in the second embodiment of the present application can better save manufacturing costs, specifically by improving the utilization rate of the metal raw material plate and facilitating miniaturized design.

[0080] 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 electrical connector, characterized in that: include: The terminal module comprises an insulator having a tongue portion and a plurality of terminals combined in the insulator; The metal shell is arranged around the terminal module, and the metal shell and the terminal module together define a ring-shaped docking space and form an insertion port at one end; Each of the terminals comprises a fixed section embedded in the insulator, a contact section exposed from the tongue plate, and a docking section extending backward out of the insulator; The shrapnel shell is attached to the inner surface of the metal shell to form the docking space, and the shrapnel shell extends to form a docking shrapnel that elastically protrudes into the docking space; wherein, At least the portion of the metal shell that forms the docking space is annular and has no seams.

2. The socket electrical connector according to claim 1, characterized in that: The shrapnel shell is annular in shape, and is fitted to the inner surface of the metal shell to form a docking space and is fixed to the metal shell by welding.

3. The socket electrical connector according to claim 2, characterized in that: A seam is formed on the shrapnel shell.

4. The socket electrical connector according to claim 1, 2 or 3, characterized in that: The docking spring piece is formed with an insertion guide section and a withdrawal guide section connected to each other, and the insertion guide section is closer to the insertion port than the withdrawal guide section; One end of the insertion guide section is integrally connected to the shrapnel shell and extends inwardly and backwardly; One end of the extraction guide section is integrally connected to the insertion guide section and extends outwardly and backwards obliquely.

5. The socket electrical connector according to claim 4, characterized in that: The free end edge of the extraction guide section extends outwardly beyond the interface formed by the inner surface of the shrapnel shell.

6. The socket electrical connector according to claim 1, 2 or 3, characterized in that: A stop portion is formed on the inner surface of the metal shell forming the docking space, and the shrapnel shell stops rearward at the stop portion.

7. The socket electrical connector according to claim 1, 2 or 3, characterized in that: The insulator further comprises a base, and the tongue portion is formed by extending forward from the base; The metal shell includes a reduced tube section arranged around the periphery of the base and a Pipe expansion section; A step-shaped stop portion is formed at the connection between the shrinking tube section and the expanding tube section, and the shrapnel shell is fitted to the inner surface of the expanding tube section and stops backward at the stop portion.

8. The socket electrical connector according to claim 7, characterized in that: The inner surface of the shrapnel shell is flush with the inner surface of the shrink tube section.

9. The socket electrical connector according to claim 7, characterized in that: The stop portion is located at the connection between the base portion and the tongue plate portion along the front-back direction.

10. The socket electrical connector according to claim 2, characterized in that: The shrapnel shell extends forward beyond the metal shell; The front end edge of the metal shell is turned outward and extended to form a skirt portion; The waterproof ring is sleeved on the periphery of the front end of the shrapnel shell and stops at the skirt portion backwards.

11. The socket electrical connector according to claim 1, characterized in that: The socket electrical connector complies with the USB TYPE C interface standard.

12. The socket electrical connector according to claim 1, characterized in that: Also includes: A middle plate member is embedded and fixed in the tongue plate portion of the insulator, and the middle plate member is exposed from both ends of the tongue plate portion in the width direction to form a buckle position, and the buckle position is used for buckling with the docking connector; The butt joint piece is embedded and fixed in the insulator and fixed to the rear end of the middle plate piece by welding. The butt joint piece extends backward out of the insulator and is formed with a butt joint foot.

13. The socket electrical connector according to claim 12, characterized in that: The rear end of the middle plate is stacked and fitted with the docking piece along the up-down direction.

14. The socket electrical connector according to claim 12, characterized in that: There are two middle plates, which are respectively embedded and fixed at two end positions of the tongue plate portion in the width direction.

15. The socket electrical connector according to claim 12, 13 or 14, characterized in that: The two butt joints are provided with two and are independent of each other. The two butt joints are respectively embedded and fixed at the two end positions in the width direction of the insulator.

16. The socket electrical connector according to claim 15, characterized in that: Any one of the butt joints includes a welding portion and a bending portion formed by the welding portion extending along the width direction of the tongue plate portion toward the side where the other butt joint is located. The welding portion is welded and fixed to the middle plate, and the bending portion is welded and fixed to the metal shell.

17. The socket electrical connector according to claim 16, characterized in that: The bending portion includes a connecting section formed by bending the welding portion upward / downward along the width direction of the tongue portion away from the edge of one side of the other mating piece, and a transverse section formed by extending the connecting section along the width direction of the tongue portion toward the side where the other mating piece is located, at least part of the surface of the transverse section is exposed outside the insulator and is attached to the inner surface of the metal shell and fixed by welding.

18. The electrical socket connector according to claim 16, characterized in that: The plurality of terminals include at least two grounding terminals, and the two grounding terminals are respectively in electrical contact with the middle plate.

19. The electrical socket connector according to claim 17, characterized in that: The docking foot is formed by extending rearward from the rear end edge of the connecting section.

20. The electrical socket connector according to claim 16, characterized in that: The insulator is formed with a base and a tongue portion extending forward from the base, and the bent portion is correspondingly embedded and fixed in the base.

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