CN113131287A

CN113131287A - Electrical connector

Info

Publication number: CN113131287A
Application number: CN201911405629.3A
Authority: CN
Inventors: 萧世伟; 萧裕三; 张衍智; 刘朦; 孟战胜
Original assignee: Fu Ding Precision Industry Zhengzhou Co Ltd; Hongteng Precision Technology Co Ltd
Current assignee: Fu Ding Precision Industry Zhengzhou Co Ltd; Hongteng Precision Technology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-07-16
Anticipated expiration: 2039-12-31
Also published as: TW202143577A; CN113131287B

Abstract

The invention discloses an electric connector which is used for being installed on a circuit board and matched with a butting connector, and comprises a plurality of terminal modules, wherein each terminal module comprises an insulating body, a plurality of pairs of signal terminals which are fixedly held in the insulating body and arranged at intervals in the vertical direction, and grounding terminals which are positioned on two opposite sides of each pair of signal terminals in the vertical direction, the signal terminals are arranged in the same plane, and each grounding terminal is arranged on a plane which is crossed with the same plane.

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 having a ground terminal.

[ background of the invention ]

Chinese patent No. CN204668627, granted on 23/09/2015, discloses an electrical connector including a plurality of terminal modules, each of which includes an insulating body, a plurality of pairs of signal terminals held in the insulating body and spaced apart in the vertical direction, and ground terminals located on opposite sides of each pair of signal terminals in the vertical direction, but the signal terminals and the ground terminals are located in the same plane, and the ground terminals have a limited shielding effect on the signal terminals in the vertical direction, so an improved electrical connector is needed.

[ summary of the invention ]

The technical problem to be solved by the invention is as follows: an electric connector with good grounding effect is provided.

In order to solve the above problems, the present invention provides an electrical connector for being mounted on a circuit board and being mated with a mating connector, the electrical connector including a plurality of terminal modules, each terminal module including an insulating body, a plurality of pairs of signal terminals fixed in the insulating body and spaced apart from each other in a vertical direction, and ground terminals located on opposite sides of each pair of signal terminals in the vertical direction, the signal terminals being disposed in a same plane, and each ground terminal being disposed in a plane intersecting the same plane.

Compared with the prior art, the electric connector according to the invention effectively reduces the crosstalk problem between each pair of signal terminals and other signal terminals by arranging the grounding terminal in the plane crossed with the signal terminals.

[ description of the drawings ]

Fig. 1 is a perspective view of a first electrical connector and a second electrical connector mated therewith of a connector assembly consistent with the present invention.

Fig. 2 is a perspective view of the first electrical connector and the second electrical connector shown in fig. 1 before mating.

Fig. 3 is a perspective view of the first electrical connector and the second electrical connector shown in fig. 2 from another perspective before mating.

Fig. 4 is a partially exploded view of the first electrical connector shown in fig. 1.

Fig. 5 is a combination of the first and second grounding plates of the first electrical connector of fig. 4.

Fig. 6 is a partially exploded view of the first electrical connector terminal assembly shown in fig. 4.

Fig. 7 is a top view of the first electrical connector of fig. 1.

Fig. 8 is a partially exploded view of the second electrical connector shown in fig. 1.

Fig. 9 is a partially exploded view of the terminal module of the second electrical connector shown in fig. 8.

Fig. 10 is another directional view of the terminal module shown in fig. 9.

Fig. 11 is a further exploded view of the terminal module of fig. 9.

Fig. 12 is another directional view of the terminal module shown in fig. 11.

Fig. 13 is a perspective view of the signal terminals of the terminal module shown in fig. 11.

Fig. 14 is a perspective view of a portion of the signal terminals and a portion of the ground shield of the connector assembly of fig. 1 mated to each other.

Fig. 15 is a cross-sectional view taken along a-a of the connector assembly shown in fig. 1 in a mated state.

Fig. 16 is a cross-sectional view taken along the direction B-B of the connector assembly shown in fig. 1 in a mated state.

Fig. 17 is an enlarged fragmentary view of the connector assembly of fig. 14 in a mated condition.

Fig. 18 is an enlarged partial view of the connector assembly of fig. 15 in a mated condition.

[ description of main reference symbols ]

First electrical connector 1 second electrical connector 2

First circuit board 3 second circuit board 4

Straight terminal 20 of insulating housing 10

Shielding cavity 33 first grounding piece 31

Bottom wall 11 of second grounding piece 32

Side wall 12 accommodating space 13

Mounting hole 111 of connector assembly 100

The guide groove 121 of the mounting slot 112

Mounting part 211 of holding part 210

Docking 213 fixing block 22

First holding portion 310 first mounting portion 311

First butting portion 313 flat plate portion 315

Second holding part 320 of contact spring 319

Second mounting portion 321 second mating portion 323

First ground pin 317 second ground pin 327

First card slot 318 and second card slot 328

Blocking part 329 terminal module 40

Holder 60 signal terminal 71

Ground terminal 81 first ground plate 91

Second ground plate 92 signal terminal pair 710

First insulating body 72 second insulating body 50

Signal terminal assembly 70 and ground terminal assembly 80

Butt end 73 mounting end 74

Middle portion 75 first support beam 732

Second support beam 733 body 731

First contact bump 701 second contact bump 702

Third contact bump 703 first signal terminal 711

Second signal terminal 712 air gap 721

Upper edge 52 of lower edge 51

Leading edge 53 and trailing edge 54

Catching rib 521,541,542 rear wall 601

The upper wall 602 catches the slot 610,611,620

First side 56 of card edge 512,522

Second side 57 mounting slots 560

Notch 562 bump 563

Ground mating end 83 ground mounting end 84

Middle region 85 first mounting frame 561

Second mounting frame 571 hole 565

Slot 902 contact insert 901

First flat plate portion 910 first contact portion 911

First mounting leg 913 second flat plate portion 920

Second contact part 921 second mounting foot 923

Contact piece 851 first aperture 917

Second aperture 927

[ detailed description ] embodiments

As shown in fig. 1 to 17, the connector assembly 100 of the present invention includes a first electrical connector 1 and a second electrical connector 2 mated with the first electrical connector 1, wherein the first electrical connector 1 is mounted on a first circuit board 3, and the second electrical connector 2 is mounted on a second circuit board 4. The first electrical connector 1 and the second electrical connector 2 can achieve a transmission speed per channel of 112Gbps or higher.

The first electrical connector 1 includes an insulative housing 10, a plurality of straight terminals 20 mounted on the insulative housing 10, a plurality of first grounding pieces 31 fixed on the insulative housing 10 along a transverse direction, and a plurality of second grounding pieces 32 fixed on the insulative housing 10 along a longitudinal direction. The plurality of first grounding plates 31 and the plurality of second grounding plates 32 are crossed with each other to form a plurality of shielding cavities 33 which are separated from each other, and the straight terminals 20 are distributed in the corresponding shielding cavities 33.

The insulating housing 10 includes a bottom wall 11 and a pair of side walls 12 extending from the same side of the bottom wall 11 and spaced from each other, and the bottom wall 11 and the two side walls 12 together enclose a receiving space 13. The bottom wall 11 includes a plurality of mounting holes 111 arranged in rows and columns penetrating through the bottom wall 11 for mounting the straight-head terminals 20 and mounting slits 112 arranged in columns for mounting the second grounding plate 32. The sidewall 12 is provided with a guiding groove 121 for guiding the second electrical connector 2 to be accurately inserted into the receiving space 13.

The straight terminals 20 are mounted on the bottom wall 11 of the insulating housing 10 in an array of rows and columns, and the straight terminals 20 are signal terminals for transmitting signals and are arranged as terminal pairs for transmitting a pair of differential signals. Each pair of said straight terminals 20 is located in a corresponding shielding cavity 33. Each pair of the straight terminals 20 includes a holding portion 210 for being mounted on the bottom wall 11, a mounting portion 211 extending downward from the holding portion 210 to the bottom wall 11 for being mounted on the first circuit board 3, and a mating portion 213 extending upward from the holding portion 210 into the receiving space 13. The first electrical connector 1 further includes a fixing block 22 integrally formed on the holding portion 210 of the pair of straight terminals 20, and the mounting holes 111 on the bottom wall 11 cooperate with the fixing block 22 to fix the pair of straight terminals 20 on the bottom wall 11. Of course, the straight terminal 20 may be directly mounted to the bottom wall 11 without the fixing block 22.

The first grounding plate 31 and the second grounding plate 32 are made of sheet metal, a plurality of the first grounding plates 31 are parallel to each other, and a plurality of the second grounding plates 32 are parallel to each other. The first grounding pieces 31 are integrally formed in the insulating housing 10, and the second grounding pieces 32 are assembled in the insulating housing 10. In the preferred embodiment, the plurality of first grounding pieces 31 and the plurality of second grounding pieces 32 are disposed to intersect each other perpendicularly. Each of the first grounding tabs 31 includes a first holding portion 310 integrally formed on the bottom wall 11, a first mounting portion 311 extending downward from the first holding portion 310 for electrically connecting with the first circuit board 3, and a first butting portion 313 extending upward from the first holding portion 310 into the receiving space 13. The first docking portion 313 includes a plate portion 315 and a plurality of contact springs 319 extending from the plate portion 315. The contact spring 319 is integrally stamped and formed from the flat plate portion 315, and is bent out of the plane of the flat plate portion 315. The second grounding plate 32 includes a second holding portion 320 mounted on the bottom wall 11, a second mounting portion 321 extending downward from the second holding portion 320 for mounting on the first circuit board 3, and a second docking portion 323 extending upward from the second holding portion 320 into the receiving space 13. The first mating portion 313 extends into the receiving space 13 in a larger dimension than the mating portion 213 of the straight-head terminal 20 extends into the receiving space 13, and the second mating portion 323 extends into the receiving space 13 in a smaller dimension than the mating portion 213 of the plug terminal extends into the receiving space 13. The first mounting portion 311 includes a plurality of first grounding pins 317, the second mounting portion 321 includes a plurality of second grounding pins 327, and the number of the second grounding pins 327 is at least three times the number of the first grounding pins 317. After the first electrical connector 1 is assembled, two sides of the mounting portion 211 of each pair of the straight terminals 20 in the transverse direction are respectively provided with a first grounding pin 317, and two sides of the longitudinal direction are provided with a plurality of second grounding pins 327. The first holding portion 310 is provided with a plurality of first card slots 318 with downward openings, the second docking portion 323 is provided with a plurality of second card slots 328 with upward openings, and the first grounding strip 31 and the second grounding strip 32 are mutually clamped with the second card slots 328 through the first card slots 318. Two sides of the second holding portion 320 of the second grounding strip 32 are respectively provided with a stopping portion 329, and the stopping portions 329 are used for limiting the second grounding strip 32 with the insulating shell 10 when the second grounding strip 32 is installed from bottom to top, so as to ensure that the second grounding strips 32 inserted into the bottom wall 11 are installed at predetermined positions.

According to the first electric connector 1, the straight-head terminal 20 for transmitting signals is shielded by the first grounding piece 31 and the second grounding piece 32 in the circumferential direction, so that the shielding effect of the first electric connector 1 is improved, the first grounding piece 31 is integrally formed with the insulating shell 10, and the insulating shell 10 is assembled by the second grounding piece 32, so that the insulating shell 10 is simple and reliable in structure, and better conditions are provided for stable transmission of high-frequency signals.

The second electrical connector 2 includes a plurality of terminal modules 40 stacked in a transverse direction and a holder 60 for integrally fixing the terminal modules 40, each of the terminal modules 40 includes an insulative housing, a plurality of signal terminals 71 held in the insulative housing, a plurality of ground terminals 81 held in the insulative housing, and a first ground plate 91 and a second ground plate 92 on opposite sides of the terminal module 40.

The insulative housing includes a plurality of first insulative housings 72 holding signal terminals 71 and a second insulative housing 50 holding ground terminals 81, the signal terminals 71 and the ground terminals 81 are electrically conductive terminals, each of the first insulative housings 72 holds a pair of the signal terminals 71 to form a signal terminal assembly 70, and each of the second insulative housings 50 holds a plurality of the ground terminals 81 to form a ground terminal assembly 80. A pair of signal terminals 71 is integrally formed in the first insulating body 72. A plurality of ground terminals 81 are integrally formed in the second insulating body 50.

The signal terminals 71 are arranged in signal terminal pairs 710, each pair of the signal terminals 71 is used for transmitting a pair of differential signals, the differential signal terminal pairs 710 and the ground terminals 81 are arranged at intervals in the vertical direction in the same terminal module 40, each signal terminal 71 comprises a wide side and a narrow side, and each ground terminal 81 comprises a wide side and a narrow side. The dimension of the broad side of the ground terminal 81 is larger than the dimension of the broad side of the signal terminal 71. The broadsides of the signal terminal pairs 710 are disposed on the same plane, and the broadside of each ground terminal 81 is disposed in a plane intersecting the plane of the differential signal terminal pair 710, preferably, in this embodiment, each ground terminal 81 is disposed in a plane perpendicular to the plane of the differential signal terminal pair 710.

Each of the signal terminals 71 includes a mating end 73 extending out of the first dielectric body 72 in the mating direction, a mounting end 74 extending out of the first dielectric body 72 in the mounting direction, and an intermediate portion 75 between the mounting end 74 and the mating end 73. The mating end 73 is perpendicular to the mounting end 74. A plurality of the signal terminals 71 are narrow-side coupled from the mounting end 74 to the mating end 73. The docking end 73 includes a body 731 and a pair of support beams extending from the body 731 in a docking direction, wherein the first leg 732 includes a first contact portion, the second leg 733 includes a second contact portion, the body 731 includes a third contact portion, the first contact portion includes a first contact bump 701, the second contact portion comprises a second contact bump 702, the third contact portion comprises a third contact bump 703, the first contact bumps 701 and the second contact bumps 702 are arranged in a first direction (i.e. a column direction), the third contact bump 703 is arranged in a direction perpendicular to the first direction and opposite to the mating direction with respect to the first contact bump 701 and the second contact bump 702, such that when the second electrical connector 2 is mated with the first electrical connector 1, the first contact bump 701 and the second contact bump 702 are mated with the first electrical connector 1 first with respect to the third contact bump 703. The area of the third contact bump 703 is larger than the sum of the areas of the first contact bump 701 and the second contact bump 702. The heights of the first contact bump 701 and the second contact bump 702 are the same, and the height of the third contact bump 703 is smaller than the heights of the first contact bump 701 and the second contact bump 702. The first contact bump 701 and the second contact bump 702 are formed by bending the first support beam 732 and the second support beam 733 in a third direction perpendicular to the first direction and the second direction, the third contact bump 703 is formed by stamping the body 731, and the first contact bump 701, the second contact bump 702 and the third contact bump 703 are all convex in the third direction. The first contact bump 701 and the second contact bump 702 are protruded along the whole first direction of the first support beam 732 and the second support beam 733, and the periphery of the third contact bump 703 is enclosed in the body 731. When the signal terminal 71 is mated with the straight terminal 20 of the first electrical connector 1, the three contact bumps are all in contact with the straight terminal 20, so that two contact points are arranged in front and back along the butting direction, a front contact point consisting of the first contact bump 701 and the second contact bump 702 which are positioned in the butting direction and are contacted with each other relatively forward, and a rear contact point consisting of the third contact point 703 which is positioned relatively backward, and the front contact point and the rear contact point are contacted with each other relative to one contact point, so that the influence of the capacitance effect of single point contact in the high-speed signal transmission process on impedance matching is effectively solved, the impedance matching performance after interconnection is improved, and the insertion loss is improved.

Each pair of the signal terminals 71 includes a first signal terminal 711 and a second signal terminal 712, the length of the first signal terminal 711 is greater than the length of the second signal terminal 712, in this embodiment, an air gap 721 exposing the first signal terminal 711 and the second signal terminal 712 to the air is disposed on the first insulating body 72, and the air gap 721 may be continuous or spaced. The length of the first signal terminal 711 exposed in the air gap 721 is greater than the length of the second signal terminal 712 exposed in the air gap 721. The air gap 721 may be provided only on one side of the first insulating body 72, or may be provided on both sides of the first insulating body 72.

The second insulating body 50 is a sheet and includes a lower edge 51 disposed toward the second circuit board, an upper edge 52 opposite to the lower edge 51, and a front edge 53 and a rear edge 54 connecting the upper edge 52 and the lower edge 51. The upper edge 52 is provided with a retaining rib 521, the rear edge 54 is provided with a retaining rib 541 and a retaining rib 542, the retaining member 60 comprises a rear wall 601 and an upper wall 602 which extend and are matched with the rear edge 54 and the upper edge 52 of the second insulating body 50, the rear wall 601 is provided with a retaining groove 610 for accommodating the corresponding retaining rib 541 and a retaining groove 611 for accommodating the corresponding retaining rib 542 in a penetrating manner, and the retaining groove 611 can extend from the rear wall 601 to the upper wall 602 or can be only arranged on the rear wall 601; the upper wall 602 is provided with catching grooves 620 for receiving the catching ribs 521 of the corresponding upper edge 52, the catching grooves 620 being opened forward and arranged on the holder 60 in a lateral array together with the other catching grooves 610 and the catching grooves 611 to hold one second insulating body, respectively, so that the terminal modules 40 can pass through the holder 60 to be fixed in a lateral alignment as one body_。The second insulating body 50 is further provided with a locking edge 512 and a locking edge 522 on the lower edge 51 and the upper edge 52, respectively, and the locking edge 512 and the locking edge 522 are used for guiding the second electrical connector 2 to align with the guiding slot 121 on the first electrical connector 1.

The second insulating body 50 has a first side surface 56 and a second side surface 57 which are oppositely arranged in the thickness direction, the first side surface 56 is provided with a mounting groove 560 and a plurality of grooves 562 which are communicated with the mounting groove 560, the mounting groove 560 is arranged from the front edge 53 to the inside of the second insulating body 50 and is sunken from the first side surface 56 to the inside of the second insulating body 50, and the grooves 562 are sunken from the first side surface 56 to the inside of the second insulating body 50 and extend from the mounting groove 560 to the lower edge 51. The grooves 562 have substantially the same shape as the length and width of the first insulating body 72, and each of the grooves 562 is used for receiving the first insulating body 72 holding a pair of signal terminals 71. The second insulating body 50 includes protrusions 563 located at both sides of each recess 562, and each ground terminal 81 is located in a corresponding one of the protrusions 563. Such that ground terminals 81 are provided on both sides of each of the differential signal terminal pairs 710 in the vertical direction. The ground terminal 81 includes a ground mating end 83 for mating with the first electrical connector 1, a ground mounting end 84 mounted on the second circuit board, the ground mounting end 84 extending beyond the mounting end 74 of the signal terminal 71, and a middle region 85 between the ground mounting end 84 and the ground mating end 83, the ground mating end 83 extending beyond the mating end 73 of the signal terminal 71 in the mating direction, such that the signal terminal is circumferentially shielded throughout the transmission path. The width dimension of the grounding middle region 85 of the grounding terminal 81 is larger than the dimension from the second side to the first side of the second insulating body 50, so that both sides of the width of the middle region 85 are exposed from the second side surface 57 of the second insulating body 50 and the corresponding side surfaces of the protrusions 563, and the middle region 85 includes a contact piece 851 further extending to both sides. The mating ends 73 of the signal terminals 71 and the ground mating ends 83 of the ground terminals are received in the mounting slots 560 in a cantilevered fashion for mating with the straight terminals 20 on the first electrical connector 1.

The first ground plate 91 is arranged on the first side surface 56 of the second insulating body 50, the second ground plate 92 is arranged on the second side surface 57 opposite to the first side surface 56, the second insulating body 50 is provided with a first mounting frame 561 for mounting the first ground plate 91 and a second mounting frame 571 for mounting the second ground plate 92, the first mounting frame 561 has the same outline of the first ground plate 91, the second mounting frame 571 has the same outline of the second ground plate 92, the first mounting frame 561 is recessed from the first side surface 56 of the second insulating body 50 to the second insulating body 50, the second mounting frame 571 is recessed from the second side surface 57 of the second insulating body 50 to the second insulating body 50, the thickness of the first ground plate 91 is not more than the depth of the first mounting frame 561, and the thickness of the second ground plate 92 is not more than the depth of the second mounting frame 571, preferably, the depth of the first mounting frame 561 is the same as the depth of the first ground plate 91, and the depth of the second mounting frame 571 is the same as the thickness of the second ground plate 92, so that, in this embodiment, after the first ground plate 91 and the second ground plate 92 are mounted on the second insulating body 50, each terminal module 40 has the same thickness as the thickness of the second insulating body 50. The first mounting frame 561 further has a hole 565 formed therein, wherein the hole 565 penetrates the first side 56 and the second side 57 of the second insulating body 50, and is generally slit-shaped. The second ground plate 92 is provided with a slot 902, and the first ground plate 91 comprises a contact tab 901, the contact tab 901 extends through the hole 565 and mates with the slot 902 to mechanically and electrically connect the first ground plate 91 and the second ground plate 92.

The first ground plate 91 includes a first flat plate portion 910, a first contact portion 911 extending from the first flat plate portion 910 in the mating direction, and a first mounting leg 913 extending from the first flat plate portion 910 to the circuit board direction, the second ground plate 92 includes a second flat plate portion 920, a second contact portion 921 extending from the second flat plate portion 920 in the mating direction, and a second mounting leg 923 extending from the second flat plate portion 920 in the circuit board direction, and the length of the first contact portion 911 extending in the mating direction is greater than the length of the second contact portion 921 extending in the mating direction. The first contact portion 911 is closer to the second insulating body 50 than the first flat plate portion 910, and the second contact portion 921 is in the same plane as the second flat plate portion 920, so the first contact portion 911 is also closer to the second contact portion 921. When the terminal modules 40 are assembled together, the distance between the first contact portion 911 and the second contact portion 921 of the adjacent first ground plate 91 and the adjacent second ground plate 92 of two adjacent terminal modules 40 is greater than the distance between the first flat plate portion 910 and the second flat plate portion 920, so that the first butting portion 313 of the first ground plate 31 of the first electrical connector 1 can extend into between the first contact portion 911 and the second contact portion 921 and be mechanically and electrically connected with both the first contact portion 911 and the second contact portion 921, wherein the flat plate portion 315 of the first butting portion 313 is matched with the second contact portion 921, and the contact spring 319 is matched with the first contact portion 911 in a contact manner. The first plate portion 910 includes a first aperture 917 engageable with the contact piece 851 of the ground terminal 81, and the second plate portion 920 includes a plurality of second apertures 927 engageable with the contact pieces 851 of the second side of the ground terminal 81. Of course, one of the first ground plate 91 or the second ground plate 92 may be in contact with the ground terminal. The ground terminal 81, the first ground plate 91 and the second ground plate 92 cooperate with each other to form a shielding channel with a closed periphery, and completely shield the pair of signal terminals 71 located in the channel in the circumferential direction on the whole transmission path, so that the influence of crosstalk between the pair of signal terminals 71 is reduced to an optimal state, thereby achieving the purpose of reducing signal crosstalk between each pair of signal terminals and achieving signal transmission at a higher rate.

After the first electrical connector 1 and the second electrical connector 2 are mated, each pair of straight-headed terminals 20 and the corresponding signal terminals 71 are mated with each other to form a pair of signal paths, the first grounding plate 31 is mechanically connected with the adjacent first grounding plate 91 and the second grounding plate 92 of the two adjacent terminal modules, and the second grounding plate 32 and the grounding terminal 81 are mated with each other to form a pair of straight-headed terminals 20 and signal terminals 71 of the signal paths, which are completely shielded in the circumferential direction on the whole transmission path, so that the electromagnetic crosstalk shielding effect is good. And the structure is simple and reliable, and better conditions are provided for stable transmission of high-frequency signals.

The above description is only one embodiment of the present invention, and not all or only one embodiment, and any equivalent changes to the technical solution of the present invention, which are made by a person skilled in the art through reading the description of the present invention, are covered by the claims of the present invention.

Claims

1. An electrical connector for mounting on a circuit board and mating with a mating connector, the electrical connector comprising a plurality of terminal modules, the terminal modules including an insulative housing, a plurality of pairs of signal terminals held in the insulative housing and spaced apart in a vertical direction, and ground terminals located on opposite sides of each pair of signal terminals in the vertical direction, the electrical connector comprising: the signal terminals are disposed in the same plane, and the ground terminals are disposed in planes intersecting the same plane.

2. The electrical connector of claim 1, wherein: the ground terminal is disposed in a plane perpendicular to the same plane.

3. The electrical connector of claim 2, wherein: the insulating body comprises a first insulating body and a second insulating body, the signal terminal is fixed in the first insulating body, and the grounding terminal is fixed in the second insulating body.

4. The electrical connector of claim 3, wherein: each pair of signal terminals is integrally formed on the first insulating body, and the plurality of ground terminals are integrally formed on the second insulating body.

5. The electrical connector of claim 3, wherein: a plurality of grooves are formed in one side face of the second insulating body, and each groove accommodates a corresponding first insulating body.

6. The electrical connector of claim 5, wherein: the second insulating body comprises bulges positioned at two sides of each groove, and the grounding terminal is positioned at the position of the bulge.

7. The electrical connector of claim 1, wherein: the ground terminal comprises a wide side and a narrow side, and the size of the wide side of the ground terminal is larger than that of the wide side of the signal terminal.

8. The electrical connector of claim 7, wherein: the signal terminals include butt-joint ends extending from the first insulating body, the ground terminals include ground mating ends extending from the second insulating body, a pair of butt-joint end narrow-side couplings of the signal terminals, and the ground mating ends of the ground terminals located on both sides of the pair of signal terminals are broadside coupled.

9. The electrical connector of claim 8, wherein: the first joint plate, the second joint plate and the grounding terminal are combined together to shield the pair of signal terminals from the axial direction.

10. The electrical connector of claim 9, wherein: at least one of the first grounding plate and the second grounding plate is provided with a gap, and the grounding terminal comprises a contact inserting sheet which extends out of the insulating body and is matched with the gap.