CN110247261B

CN110247261B - Electrical connector

Info

Publication number: CN110247261B
Application number: CN201910498321.1A
Authority: CN
Inventors: 冯晓; 曹永金
Original assignee: Lotes Guangzhou Co Ltd
Current assignee: Lotes Guangzhou Co Ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-11-24
Anticipated expiration: 2039-06-10
Also published as: CN110247261A

Abstract

The invention discloses an electric connector, which is used for butting with a butting connector, wherein a plurality of first signal terminals are arranged on an insulating body along the transverse direction, and each first signal terminal is provided with a first contact part exposed on a tongue plate and a first front end part bent and extended along the vertical direction from the front end of the first contact part; a shielding piece is accommodated in the insulating body, the shielding piece comprises at least one main body part, a shielding part extends forwards from the main body part, the shielding part is accommodated in the tongue plate, at least one connecting part extends transversely from the main body part, a grounding part extends forwards from the connecting part and is used for being in butt joint with a butt joint connector, the shielding part is shielded on one side of the first contact part, the grounding part and the shielding part are arranged at intervals along the transverse direction, when viewed from the front to the rear projection direction, the projection of the shielding part is overlapped with the projection part of the first front end part, the problem of poor contact can be avoided, the shielding effect is good and more stable, and the shielding part is arranged close enough to the first contact part to effectively reduce crosstalk.

Description

Electrical connector

[ technical field ] A method for producing a semiconductor device

The present invention relates to an electrical connector, and more particularly, to an electrical connector with a shield.

[ background of the invention ]

Chinese patent application No. CN201120136325.4 discloses an electrical connector. The electric connector comprises an insulating body, a tongue plate and seven first terminals, wherein the tongue plate extends forwards from the insulating body, and the seven first terminals comprise two pairs of differential signal terminals and three grounding terminals which are alternately arranged. A ground member, said ground member including an elongated base portion, a plurality of prongs disposed perpendicular to said base portion. The grounding piece and the first terminal are respectively assembled in the tongue plate, the grounding piece is positioned on the lower side of the front end of the first terminal, and the grounding piece is in contact with the front end of the grounding terminal through the elastic fork to perform grounding.

Because the grounding piece and the grounding terminal enter the tongue plate through assembly, gaps are formed between the grounding piece and the tongue plate and between the grounding piece and the grounding terminal and the tongue plate, however, the grounding piece is contacted with the grounding terminal through an elastic branch, when the electric connector shakes in the using process, the branch is easily in poor contact with the grounding terminal, and the grounding cannot be normally realized. Secondly, since the grounding member is only located at the lower side of the front end of the first terminal, the grounding member does not shield the whole contact portion of the differential signal terminal pair, and therefore does not shield noise signals around the contact portion of the differential signal terminal pair, and the differential signal terminal pair emits an electromagnetic field during signal transmission to generate more energy, thereby easily generating crosstalk, affecting the signal transmission of the electrical connector, and further affecting the functional use of the connector. Moreover, since the electrical connector contacts the ground terminal through the ground member, thereby achieving a grounding effect, two pairs of differential signal terminals, three ground terminals, and the ground member having different shapes need to be manufactured in the manufacturing process of the electrical connector, and a plurality of manufacturing processes need to be performed, thereby increasing the production cost.

Therefore, there is a need for an improved electrical connector that overcomes the above problems.

[ summary of the invention ]

In view of the problems of the prior art, an object of the present invention is to provide an electrical connector that can enhance grounding stability and shielding effect and effectively reduce crosstalk effect by integrally extending a shielding portion and a grounding portion on a shielding member such that a projection portion of a first front end portion and the shielding portion in a front-rear direction overlaps.

In order to achieve the purpose, the invention adopts the following technical scheme: the invention provides an electric connector, which is used for butting with a butting connector and comprises: the tongue plate comprises an insulating body, a first fixing part and a second fixing part, wherein the insulating body is provided with a tongue plate extending forwards; the first signal terminals are arranged on the insulating body along the transverse direction, and each first signal terminal is provided with a first contact part exposed out of the tongue plate and a first front end part bent and extended along the vertical direction from the front end of the first contact part; a shielding member is accommodated in the insulating body, the shielding member includes at least one main body portion, a shielding portion extends forwards from the main body portion, the shielding portion is accommodated in the tongue plate, at least one connecting portion extends transversely from the main body portion, a grounding portion extends forwards from the connecting portion for butting with the butting connector, the shielding portion shields one side of the first contact portion, the grounding portion and the shielding portion are arranged at intervals along the transverse direction, and when viewed along the front-to-back projection direction, the projection of the shielding portion overlaps with the projection of the first front end portion.

Further, the grounding part comprises an extension section extending downwards from the connecting part and a grounding section extending forwards from the extension section, and the grounding section and the first contact part are positioned on the same surface of the tongue plate.

Furthermore, the front end of the first contact part is bent upwards to extend the first front end part, the shielding part is shielded above the first contact part, and when viewed from the front to the back projection direction, the projection of the first front end part is overlapped with the projection of the shielding part.

Furthermore, a solder leg is bent downwards from the connecting part, and the width of the solder leg along the transverse direction is smaller than that of the grounding part along the transverse direction.

Further, the center line of the solder leg is aligned with the center line of the ground part in the front-rear direction.

Furthermore, the first signal terminal comprises a first fixing portion fixed on the insulating body, a first welding portion bent downwards from the first fixing portion and extending out of the insulating body, and the first welding portion and the welding feet are arranged in a row along the transverse direction.

Furthermore, a metal piece is respectively inserted into two sides of the insulating body, each metal piece comprises an installation part, and the installation part, the welding leg and the first welding part are welded on a circuit board in a surface installation mode.

Furthermore, the insulating body further comprises a base, the tongue plate extends forwards from the base, an opening is formed in the rear end face of the base in a forward concave mode, and the shielding part is partially exposed out of the opening.

Further, the opening extends from the base to the tongue plate, and the shielding portion and the grounding portion are exposed to the opening.

Furthermore, a guide part extends forwards from two sides of the base part respectively, a guide groove is recessed backwards from the front end of each guide part, the tongue plate is positioned between the two guide grooves, and the guide grooves are used for guiding the butting connector to be butted with the tongue plate.

Further, the shielding part has a first end, and the grounding part has a second end, and the second end is located in front of the first end.

Further, the main body has a plurality of main bodies, each main body extends forward to form the shielding portion, the connecting portions extend laterally from two sides of each main body, each connecting portion extends forward to form the grounding portion, the plurality of first signal terminals include a plurality of pairs of differential signal terminals, each shielding portion covers an upper side of one pair of the differential signal terminals, and each pair of the differential signal terminals is located between two adjacent grounding portions.

Further, the shield plate is formed by press, and the main body portion, the shield portion, the connecting portion, and the ground portion are integrally connected.

Further, the width of each of the shielding portions is greater than the sum of the widths of the first contact portions of each of the differential signal terminal pairs.

Further, each of the shielding portions extends forward from the main body portion to a front end of the first contact portion.

Further, a center line between the two first contact portions of each pair of differential signal terminals coincides with a center line of the corresponding shielding portion.

Further, a plurality of the shielding parts are arranged in a row along the transverse direction and are located on the same horizontal plane, and a plurality of the grounding sections are arranged in a row along the transverse direction and are located on the same horizontal plane.

Further, the first front end portion is embedded in the tongue plate, and the front end of the grounding portion is exposed on the lower surface of the tongue plate.

Further, a convex portion is convexly arranged on the lower surface of the tongue plate, a first butting surface and a second butting surface are arranged on two sides of the convex portion, the first contact portion and the grounding portion are exposed on the first butting surface, and the plurality of power terminals are accommodated in the insulating body and exposed on the second butting surface.

Furthermore, the upper surface of the tongue plate at a position corresponding to the convex portion has a third abutting surface, a plurality of second signal terminals are accommodated in the insulating body, each second signal terminal has a second contact portion, each second contact portion is exposed from the third abutting surface, and in the vertical direction, the shielding portion is located between the first contact portion and the second contact portion.

Compared with the prior art, the invention has the following beneficial effects: the shielding part comprises a main body part, a shielding part extends forwards from the main body part, a connecting part extends transversely from the main body part, a grounding part extends forwards from the connecting part, the grounding part is directly and electrically butted with the butting connector, the grounding part and the shielding part of the shielding part are integrally arranged, the problem of poor contact can be avoided, the overall shielding effect is improved, the shielding effect is more stable, the manufacturing process is reduced, and the cost is saved, the grounding part and the shielding part are arranged at intervals along the transverse direction, the shielding part shields one side of the first contact part, and the projection of the shielding part is overlapped with the projection part of the first front end part when viewed from the front-to-back projection direction, so that the distance between the shielding part and the first contact part is close enough, and the shielding part can effectively shield the first contact part, therefore, noise signals around the first contact part of the first signal terminal are effectively shielded, even if the first signal terminal emits electromagnetic fields to generate energy in the process of signal transmission, the closer the shielding part is to the first contact part, the more energy generated by the first signal terminal is absorbed by the shielding part, and therefore crosstalk can be effectively reduced by the shielding part.

[ description of the drawings ]

Fig. 1 is an exploded perspective view of the electrical connector of the present invention;

FIG. 2 is an exploded perspective view of the electrical connector of the present invention from another perspective;

FIG. 3 is a perspective assembly view of FIG. 1;

FIG. 4 is a perspective assembly view of FIG. 2;

FIG. 5 is a top view of FIG. 3;

FIG. 6 is a schematic diagram of the combination of the first signal terminal, the second signal terminal, the ground terminal, the power terminal and the shield;

FIG. 7 is a front view of FIG. 6;

fig. 8 is a top view of the first signal terminal and shield of fig. 6;

fig. 9 is a front view of the first signal terminal and shield of fig. 6.

Detailed description of the embodiments reference is made to the accompanying drawings in which:

[ detailed description ] embodiments

For a better understanding of the objects, structure, features, and functions of the invention, reference should be made to the drawings and detailed description that follow.

As shown in fig. 1, the electrical connector 100 of the present invention is adapted to be mated with a mating connector (not shown). The electrical connector 100 includes an insulative housing 1, a plurality of first signal terminals 2, a plurality of second signal terminals 3, a plurality of ground terminals 4, a plurality of power terminals 5 and a shielding member 6 disposed in the insulative housing 1. Two metal pieces 7 are further inserted on two sides of the insulating body 1, and the metal pieces 7 are used for fixing the insulating body 1 on a circuit board (not shown).

As shown in fig. 1 to 4, the insulative housing 1 is elongated, the insulative housing 1 includes a base 11 and a mating portion 12, the mating portion 12 includes a tongue plate 120 extending forward from the base 11 and a guiding portion 121 extending forward from two sides of the base 11, a guiding slot 1211 is recessed backward from front ends of the two guiding portions 121, the tongue plate 120 is located between the two guiding slots 1211, and the guiding slot 1211 is used for guiding the mating connector to mate with the tongue plate 120. The lower surface of the tongue plate 120 has a first abutting surface 122 and a second abutting surface 123, a protrusion 124 is further protruded from the lower surface of the tongue plate 120, the protrusion 124 is located between the first abutting surface 122 and the second abutting surface 123, the width of the second abutting surface 123 in the transverse direction is greater than the width of the first abutting surface 122 in the transverse direction, the upper surface of the tongue plate 120 at the position corresponding to the protrusion 124 has a third abutting surface 125, an opening 126 is recessed forward from the rear end surface of the base 11, and the opening 126 extends forward from the base 11 to the tongue plate 120. The first abutting surface 122, the second abutting surface 123 and the third abutting surface 125 are respectively formed with a plurality of first receiving grooves 127, a plurality of second receiving grooves 128 and a plurality of third receiving grooves 129, and each of the first receiving grooves 127, each of the second receiving grooves 128 and each of the third receiving grooves 129 extend backward through the front end surface of the tongue plate 120 and the rear end surface of the base portion 11. The first signal terminals 2 and the shields 6 are received in the first receiving grooves 127 along the transverse direction and exposed at the first mating surfaces 122, the power terminals 5 are received in the second receiving grooves 128 along the transverse direction and exposed at the second mating surfaces 123, and the second signal terminals 3 and the ground terminals 4 are received in the third receiving grooves 129 along the transverse direction and exposed at the third mating surfaces 125. Two sides of the base 11 are further provided with positioning portions 13, the two positioning portions 13 are respectively provided with positioning holes 131 penetrating through the positioning portions 13 along the vertical direction, and the two metal pieces 7 are respectively accommodated in the positioning holes 131.

As shown in fig. 1, 3 and 4, each of the first signal terminals 2 is assembled in the first receiving groove 127 from the back to the front, each of the first signal terminals 2 includes a first fixing portion 21 fixed on the base portion 11, a first contact portion 22 extending from the first fixing portion 21 to the front and exposed to the first mating surface 122, a first soldering portion 23 bent downward from the first fixing portion 21 to extend out of the base portion 11, a first front end portion 24 bent upward from the front end of the first contact portion 22 along the vertical direction, and the first front end portion 24 is embedded in the tongue portion 120. Each of the second signal terminals 3 is assembled in the third receiving groove 129 from the back to the front, each of the second signal terminals 3 includes a second fixing portion 31 fixed to the base portion 11, a second contact portion 32 extending from the second fixing portion 31 to the front and exposed to the third mating surface 125, a second welding portion 33 bent from the second fixing portion 31 to the bottom and extending out of the base portion 11, a second front end portion 34 extending from the front end of the second contact portion 32 to the top, and the second front end portion 34 is fixed to the third receiving groove 129. The plurality of ground terminals 4 and the plurality of second signal terminals 3 are commonly received in the third receiving groove 129 and exposed at the third mating surface 125, and the plurality of power terminals 5 are assembled in the second receiving groove 128 from the back to the front and exposed at the second mating surface 123. As shown in fig. 7, the plurality of power terminals 5 and the plurality of first signal terminals 2 are located at the same level in the lateral direction, and the ground terminal 4 and the second signal terminals 3 are located higher than the power terminals 5 and the first signal terminals 2 in the vertical direction.

As shown in fig. 1 and 3, the shielding element 6 is formed by stamping a metal plate, and is assembled in the first receiving groove 127 from the back to the front, the shielding element 6 includes a plurality of main body portions 61 fixed on the base portion 11, each main body portion 61 extends forward to be received in a shielding portion 62 of the tongue plate 120, the shielding portion 62 is in a flat plate shape, a plurality of connecting portions 63 extend laterally from two sides of each main body portion 61, each connecting portion 63 extends forward to form a grounding portion 64, the grounding portion 64 is exposed on the first butting surface 122 to be butted with the butting connector, and a front end of the grounding portion 64 is exposed on a lower surface of the tongue plate 120. The main body 61, the shielding part 62, the connecting part 63 and the grounding part 64 are integrally connected, and the grounding part 64 and the shielding part 62 are integrally arranged, so that the problem of poor contact caused by the fact that the grounding part and the grounding terminal 4 are separately arranged is avoided, the shielding effect is good and more stable, the manufacturing processes and raw materials of the electric connector 100 can be reduced, and the production rate is increased, each grounding part 64 comprises an extension segment 641 which is obliquely extended downwards from the connecting part 63, a grounding segment 642 which is forwardly extended from the extension segment 641 and is exposed on the first butting surface 122, and the shielding part 6 further comprises a solder leg 65 which is downwardly bent and extended from each connecting part 63 and is extended out of the base part 11. In this embodiment, the shield 6 has a plurality of main bodies 61 and a plurality of shield portions 62, and in other embodiments, the number of the main bodies 61 and the shield portions 62 may be one, and correspondingly, there are two connecting portions 63 and two grounding portions 64 extending from both sides of the main body 61. As shown in fig. 8 and 9, the shielding portions 62 are arranged in a row in the transverse direction and located on the same horizontal plane, each shielding portion 62 extends forward from the main body portion 61 to the front end of the first contact portion 22, the length of each shielding portion 62 is the same, the grounding portions 64 are arranged in a row in the transverse direction and located on the same horizontal plane, each grounding portion 64 extends forward from the connecting portion 63 to the same length that is flush with and extends to the first front end portion 24, the shielding portions 62 and the grounding portions 64 are arranged at intervals in the transverse direction and in the vertical direction, the shielding portion 62 is located above the grounding portion 64, each shielding portion 62 is located between two adjacent grounding portions 64, the shielding portion 62 has a first end 621, the grounding portion 64 has a second end 643, the second end 643 is located forward of the first end 621. The grounding portion 64, the connecting portion 63, and the solder tail 65 are aligned in the front-rear direction, the width of the solder tail 65 in the transverse direction is smaller than the width of the grounding portion 64 in the transverse direction, and the center line of the solder tail 65 is aligned in the front-rear direction with the center line of the grounding portion 64. In this embodiment, the land portion 64, the connection portion 63, and the solder tail 65 are aligned in the front-rear direction, but in other embodiments, the land portion 64, the connection portion 63, and the solder tail 65 may not be aligned in the front-rear direction.

As shown in fig. 4, 5, 6, and 7, the shielding element 6 and the plurality of first signal terminals 2 are commonly received in the first receiving slot 127, in the vertical direction, the shielding portion 62 is located between the first contact portion 22 and the second contact portion 32, the first contact portion 22 and the grounding portion 64 are located on one side of the protruding portion 124, the first contact portion 22 and the grounding portion 642 are exposed at the first mating surface 122 for mating with the mating connector, the shielding portion 62 and the grounding portion 64 are partially exposed at the opening 126, and the opening 126 can provide a heat dissipation channel for the shielding element 6, so as to prevent the electrical connector 100 from being over-heated. The grounding sections 642 are arranged in a row along the transverse direction with the first contact portions 22 and located at the same horizontal plane, so that the grounding sections 642 and the first contact portions 22 can be simultaneously butted with the butting connector, and the contact stability of the grounding portion 64 and the butting connector is ensured. As shown in fig. 8 and 9, the plurality of signal terminals are composed of a plurality of pairs of differential signal terminals 25, each pair of differential signal terminals 25 is located between two adjacent ground portions 64, and a center line between two first contact portions 22 of each pair of differential signal terminals 25 coincides with a center line of the corresponding shielding portion 62 located above the center line. Each of the shielding portions 62 covers the pair of differential signal terminals 25, and in other embodiments, each of the shielding portions 62 can also cover the pair of differential signal terminals 25. The shielding portions 62 are shielded above the first contact portions 22 and extend forward from the main body portion 61 to the front ends of the first contact portions 22, the width of each shielding portion 62 in the transverse direction is greater than the sum of the widths of the first contact portions 22 of each pair of differential signal terminals 25, so that the length of the shielding portion 62 in the front-back direction is sufficiently long, and the width of the shielding portion 62 in the transverse direction is sufficiently wide, so that the shielding portion 62 shields most of the first contact portions 22, and a good shielding effect of the electrical connector 100 is ensured. The shielding element 6 is disposed above the first signal terminal 2, and when viewed in a front-back direction projection, a projection of the first front end portion 24 overlaps a projection of the shielding portion 62, so that a distance between the shielding portion 62 and the first contact portion 22 is sufficiently short, since the first signal terminal 2 emits an electromagnetic field during signal transmission to generate energy, and the closer the distance between the shielding portion 62 and the first contact portion 22 is, the more energy the shielding portion 62 absorbs generated by the first signal terminal 2, and thus crosstalk can be effectively reduced by disposing the shielding portion 62. The first soldering portion 23 and the solder tail 65 are both used for soldering to the circuit board, and the first soldering portion 23 and the solder tail 65 are arranged in a row along the transverse direction.

As shown in fig. 1 and 4, the metal member 7 includes a holding portion 71 and an installation portion 72 extending from the holding portion 71 in a transverse bending manner, and the installation portion 72, the solder leg 65, the first soldering portion 23 and the second soldering portion 33 are soldered to the circuit board in a uniform surface mounting manner.

In summary, the electrical connector 100 of the present invention has the following advantages:

(1) the shielding member 6 comprises the main body 61, the shielding part 62 extends forwards from the main body 61, the connecting part 63 extends transversely from the main body 61, the grounding part 64 extends forwards from the connecting part 63, the grounding part 64 is directly electrically butted with the butting connector, the grounding part 64 and the shielding part 62 of the shielding member 6 are integrally arranged, the problem of poor contact can be avoided, the whole shielding effect is improved and more stable, the manufacturing process can be reduced, the cost is saved, the grounding part 64 and the shielding part 62 are arranged at intervals along the transverse direction, the shielding part 62 shields one side of the first contact part 22, and the projection of the shielding part 62 is overlapped with the projection part of the first front end part 24 when viewed from the front-to-back projection direction, so that the distance between the shielding part 62 and the first contact part 22 is close enough, the shielding portion 62 can effectively cover the first contact portion 22, so as to effectively shield the noise signal around the first contact portion 22 of the first signal terminal 2, even if the first signal terminal 2 emits an electromagnetic field to generate energy during signal transmission, the closer the shielding portion 62 is to the first contact portion 22, the more energy the shielding portion 62 absorbs the energy generated by the first signal terminal 2, and thus the crosstalk can be effectively reduced by the shielding portion 62.

(2) The shielding portions 62 are shielded above the first contact portions 22 and extend forward from the main body portion 61 to the front ends of the first contact portions 22, the width of each shielding portion 62 in the transverse direction is greater than the sum of the widths of the first contact portions 22 of each pair of differential signal terminals 25, so that the length of the shielding portion 62 in the front-back direction is sufficiently long, and the width of the shielding portion 62 in the transverse direction is sufficiently wide, so that the shielding portion 62 shields most of the first contact portions 22, and a good shielding effect of the electrical connector 100 is ensured.

(3) Each of the shielding portions 62 is shielded above a pair of the differential signal terminals 25, so that signal crosstalk between the differential signal terminals 25 can be prevented.

(4) The grounding sections 642 are arranged in a row along the transverse direction with the first contact portions 22 and located at the same horizontal plane, so that the grounding sections 642 and the first contact portions 22 can be simultaneously butted with the butting connector, and the contact stability of the grounding portion 64 and the butting connector is ensured.

(5) The shielding portion 62 and the grounding portion 64 are partially exposed to the opening 126, and the opening 126 can provide a heat dissipation path for the shielding member 6, so as to prevent the electrical connector 100 from being over-heated.

The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all technical changes that can be made by applying the present specification and the drawings are included in the scope of the present invention.

Claims

1. An electrical connector for mating with a mating connector, comprising:

the tongue plate comprises an insulating body, a first fixing part and a second fixing part, wherein the insulating body is provided with a tongue plate extending forwards;

the first signal terminals are arranged on the insulating body along the transverse direction, and each first signal terminal is provided with a first contact part exposed out of the tongue plate and a first front end part bent and extended along the vertical direction from the front end of the first contact part;

a shielding member is accommodated in the insulating body, the shielding member includes at least one main body portion, a shielding portion extends forwards from the main body portion, the shielding portion is accommodated in the tongue plate, at least one connecting portion extends transversely from the main body portion, a grounding portion extends forwards from the connecting portion for being in butt joint with the butting connector, the shielding portion shields one side of the first contact portion, the grounding portion and the shielding portion are arranged at intervals along the transverse direction, when viewed from the front-to-back projection direction, the projection of the shielding portion overlaps with the projection of the first front end portion, the shielding portion is located behind the front end portion, and the shielding portion is located between the upper horizontal plane of the front end portion and the lower horizontal plane of the contact portion.

2. The electrical connector of claim 1, wherein: the grounding part comprises an extension section which is downwards inclined and extends from the connecting part, and a grounding section which is forwards extended from the extension section, and the grounding section and the first contact part are positioned on the same surface of the tongue plate.

3. The electrical connector of claim 1, wherein: the front end of the first contact part is bent upwards to extend out of the first front end part, the shielding part is shielded above the first contact part, and when the shielding part is seen along the projection direction from front to back, the projection of the first front end part is overlapped with the projection part of the shielding part.

4. The electrical connector of claim 1, wherein: and a welding leg is bent downwards from the connecting part and extends, and the width of the welding leg along the transverse direction is smaller than that of the grounding part along the transverse direction.

5. The electrical connector of claim 4, wherein: the center line of the welding leg is aligned with the center line of the grounding part along the front-back direction.

6. The electrical connector of claim 4, wherein: the first signal terminal comprises a first fixing part fixed on the insulating body, a first welding part bent downwards from the first fixing part and extending out of the insulating body, and the first welding part and the welding feet are arranged in a row along the transverse direction.

7. The electrical connector of claim 6, wherein: the two sides of the insulating body are respectively inserted with a metal piece, each metal piece comprises an installation part, and the installation part, the welding leg and the first welding part are welded on a circuit board in a surface installation mode.

8. The electrical connector of claim 1, wherein: the insulating body further comprises a base, the tongue plate extends forwards from the base, an opening is formed in the rear end face of the base in a forward concave mode, and the shielding portion is partially exposed out of the opening.

9. The electrical connector of claim 8, wherein: the opening extends from the base to the tongue plate, and the shielding portion and the grounding portion are exposed to the opening.

10. The electrical connector of claim 8, wherein: and the two sides of the base part respectively extend forwards to form a guide part, a guide groove is concavely arranged backwards from the front end of each guide part, the tongue plate is positioned between the two guide grooves, and the guide grooves are used for guiding the butting connector to be butted with the tongue plate.

11. The electrical connector of claim 1, wherein: the shielding part is provided with a first end, the grounding part is provided with a second end, and the second end is positioned in front of the first end.

12. The electrical connector of claim 1, wherein: the main body part is provided with a plurality of shielding parts, each shielding part extends forwards, the connecting parts extend transversely from two sides of each main body part respectively, each connecting part extends forwards to the grounding part, the plurality of first signal terminals comprise a plurality of pairs of differential signal terminals, each shielding part is shielded on the upper side of one pair of differential signal terminals, and each pair of differential signal terminals is positioned between two adjacent grounding parts.

13. The electrical connector of claim 12, wherein: the shielding part is formed by punching, and the main body part, the shielding part, the connecting part and the grounding part are integrally connected.

14. The electrical connector of claim 12, wherein: each of the shielding portions has a width greater than a sum of widths of the first contact portions of each of the differential signal terminal pairs.

15. The electrical connector of claim 14, wherein: each shielding part extends forwards from the main body part to the front end of the first contact part.

16. The electrical connector of claim 12, wherein: a center line between the two first contact parts of each pair of differential signal terminals coincides with a center line of the shielding part corresponding to the center line.

17. The electrical connector of claim 12, wherein: each grounding part comprises an extension section extending downwards from the connecting part in a downward inclined mode, a grounding section extending forwards from the extension section, a plurality of shielding parts are arranged in a row along the transverse direction and located on the same horizontal plane, and a plurality of grounding sections are arranged in a row along the transverse direction and located on the same horizontal plane.

18. The electrical connector of claim 1, wherein: the first front end part is embedded in the tongue plate, and the front end of the grounding part is exposed on the lower surface of the tongue plate.

19. The electrical connector of claim 1, wherein: a convex portion is convexly arranged on the lower surface of the tongue plate, a first butting surface and a second butting surface are arranged on two sides of the convex portion, the first contact portion and the grounding portion are exposed out of the first butting surface, and the plurality of power terminals are accommodated in the insulating body and exposed out of the second butting surface.

20. The electrical connector of claim 19, wherein: the upper surface of the tongue plate at the position corresponding to the convex part is provided with a third butt joint surface, a plurality of second signal terminals are accommodated in the insulating body, each second signal terminal is provided with a second contact part, each second contact part is exposed out of the third butt joint surface, and in the vertical direction, the shielding part is positioned between the first contact part and the second contact part.