CN110808491A

CN110808491A - Electrical connector assembly

Info

Publication number: CN110808491A
Application number: CN201810884090.3A
Authority: CN
Inventors: 庄顺荣
Original assignee: Foxconn Interconnect Technology Ltd
Current assignee: Foxconn Interconnect Technology Ltd
Priority date: 2018-08-06
Filing date: 2018-08-06
Publication date: 2020-02-18
Anticipated expiration: 2038-08-06
Also published as: TWI816850B; TW202017259A; CN110808491B

Abstract

The invention provides an electric connector assembly, which comprises a first circuit board, a first connector and a plurality of cables, wherein the first connector is fixedly arranged on the circuit board, the metal shell is fixedly arranged outside the first circuit board, the first connector comprises an insulating body, the cable comprises a plurality of first terminals and a shielding shell, wherein the first terminals are fixedly arranged in the insulating body, the shielding shell is fixedly arranged outside the insulating body, the insulating body comprises a base and an annular butt joint wall which protrudes upwards from the base and is provided with a butt joint groove, the first terminals at least comprise two signal terminals and a grounding terminal positioned between the two signal terminals, the first terminals are electrically connected with a plurality of cables by a first circuit board, the first circuit board and a first connector are accommodated in a metal shell, an opening for the first connector to protrude outwards is formed in the metal shell, the cables are indirectly connected with the first terminals, and therefore the first terminals are prevented from being damaged by pulling of the cables.

Description

Electrical connector assembly

[ technical field ] A method for producing a semiconductor device

The present invention relates to an electrical connector assembly, and more particularly to an electrical connector assembly capable of transmitting multiple sets of signals.

[ background of the invention ]

In the prior art, a coaxial connector usually has one terminal set, which can only transmit a single signal, and the application has limitations, so please refer to patent No. TW201405980A disclosed in taiwan, which discloses a coaxial connector having two pairs of terminal sets to meet the requirement of multi-group signal transmission, but in the former case, two pairs of terminal sets are adjacent and no shielding structure is disposed between the two pairs of terminal sets, when transmitting a high frequency signal, signal interference is likely to occur between the two pairs of terminal sets to affect the stability of the signal, which is not beneficial to high frequency signal transmission, and the cable in the former case is directly welded to the terminal, and when the cable is pulled, the terminal is likely to be driven, which causes the terminal damage.

Therefore, there is a need to provide a new electrical connector assembly that overcomes the above-mentioned drawbacks.

[ summary of the invention ]

The invention aims to provide an electric connector assembly which can transmit a plurality of groups of signals and has the advantages of better signal shielding, interference resistance and good structural strength.

The purpose of the invention is realized by the following technical scheme: an electric connector assembly comprises a first circuit board, a first connector and a plurality of cables which are fixedly held on the circuit board, and a metal shell which is fixedly held outside the first circuit board, wherein the first connector comprises an insulating body, a plurality of first terminals which are fixedly held in the insulating body, and a shielding shell which is fixedly held outside the insulating body, the insulating body comprises a base and an annular butt joint wall which is upwards protruded from the base and provided with a butt joint groove, the first terminals at least comprise two signal terminals and a grounding terminal which is positioned between the two signal terminals, the first circuit board electrically connects the first terminals with the cables, and the metal shell accommodates the first circuit board and the first connector and is provided with an opening through which the first connector outwards protrudes.

Further, the metal shell of the electrical connector assembly of the present invention includes a first plate portion and a second plate portion opposite to the first plate portion, a receiving space for receiving the first circuit board and the first connector is formed between the first plate portion and the second plate portion, the opening is located in the first plate portion, the first plate portion includes a protruding plate portion located behind the opening and protruding outward, two sides of the protruding plate portion are provided with a side portion extending toward the second plate portion and an extending portion extending from the end of the side portion in a transverse bending manner, the extending portion and edges of two transverse sides of the opening are located in the same horizontal plane, the second plate portion is formed by extending from the front end of the first plate portion in a bending manner, the second plate portion includes a flat plate portion and a press-connection portion extending from two sides of the flat plate portion in a bending manner, the pressing part is clamped at the two lateral side edges of the opening and the extension part.

Furthermore, the front end and the rear end of the base of the insulating body of the electric connector component are provided with two through grooves which are vertically penetrated, the first terminals of the first connector comprise fixing parts fixed in the annular butting wall, U-shaped butting parts extending from one ends of the fixing parts and exposed in the butting grooves and welding parts extending from the other ends of the fixing parts, two adjacent first terminals are arranged in a reverse symmetry mode in the front-back direction, the welding parts of the plurality of first terminals are exposed in the two through grooves, the shielding shell comprises a cylindrical part which is annularly arranged around the annular butting wall and a first grounding part which is positioned at the lower edge of the cylindrical part and transversely extends to form, the cylindrical portion surrounds the two through grooves to accommodate the welding portion of the first terminal in the shielding shell, and the first connector portion is exposed out of the metal shell through the opening.

Furthermore, the first terminals of the electrical connector assembly of the present invention at least include a plurality of signal terminals and a plurality of ground terminals, two ground terminals are disposed between two adjacent signal terminals, the plurality of cables at least include a plurality of signal cables, the first circuit board has a first surface and a second surface opposite to the first surface, and the first circuit board includes a plurality of first contacts disposed on the first surface for electrically connecting the plurality of signal cables with the plurality of signal terminals of the first connector.

Furthermore, the plurality of signal cables of the electric connector assembly of the present invention each include a wire core located at a central position, an inner insulating layer wrapping the wire core, a shielding layer wrapping the inner insulating layer, and an outer insulating layer wrapping the shielding layer, the wire core is electrically connected to the first contact point, a plurality of first clamping portions are formed at a rear edge of the protruding plate portion, a plurality of second clamping portions are formed at a rear edge of the second plate portion, the plurality of first clamping portions and the plurality of second clamping portions are arranged side by side at intervals in a transverse direction, the plurality of first clamping portions and the plurality of second clamping portions clamp the shielding layer and the outer insulating layer of the plurality of signal cables, the first clamping portions and the second clamping portions each have a clamping opening, and the clamping openings of the first clamping portions and the clamping openings of the second clamping portions are opposite in direction.

Furthermore, the first circuit board of the electrical connector assembly of the present invention has a plurality of second contacts on the first surface and the second surface, the ground terminal, the first ground portion, and the edges and the extending portions on the two lateral sides of the opening are electrically connected to the plurality of second contacts on the first surface, the flat plate portion includes a protruding portion protruding into the accommodating space, and the protruding portion and the ground portion of the shielding shell are electrically connected to the plurality of second contacts on the second surface.

Furthermore, the plurality of cables and the first circuit board of the electrical connector assembly of the present invention are electrically connected to the rear end of the first circuit board, the plurality of cables and the first circuit board are electrically connected to be located between the protruding plate portion of the first board body portion and the second board body portion, and the electrical connector assembly further includes an insulating member wrapping the electrical connection position of the plurality of cables and the first circuit board.

Further, a mating connector assembly for mating with the electrical connector assembly of the present invention comprises a second circuit board and a second connector electrically connected to the second circuit board, the second connector comprises an insulator, a plurality of second terminals held on the insulator, and a metal shell held outside the insulator, the insulator, the plurality of second terminals and the metal shell are integrally formed into a whole by injection molding, the insulator comprises a base part, a butt joint convex part formed by upward protruding from the base part and an annular outer wall annularly arranged on the peripheral side of the butt joint convex part, a first space for the insertion of the annular butt joint wall is formed between the butt joint convex part and the annular outer wall, the metal shell comprises an annular wall part fixed on the outer side of the annular butt joint wall and a second grounding part formed by transversely extending the lower edge of the annular wall part.

Furthermore, the second terminals of the butting connector assembly comprise n-shaped contact parts exposed out of the butting convex parts and welding pins formed by bending and extending one ends of the contact parts, the two adjacent second terminals are oppositely and symmetrically arranged in the front-back direction, and hook parts embedded in the insulator are respectively formed by transversely extending the two transverse sides of the other end of the contact.

Further, a second space is formed between the annular butting wall of the butting connector assembly and the shielding shell, when the electric connector assembly is butted with the butting connector assembly, the butting convex part of the butting connector assembly is inserted into the butting groove so as to enable the first terminal to be electrically connected with the second terminal, the annular outer wall and the annular wall part are jointly inserted into the second space, and the outer side surface of the annular wall part and the inner side surface of the cylindrical part are inserted to be commonly grounded and electrically connected.

Compared with the prior art, the electric connector has the following beneficial effects: because the first connector of the electric connector assembly is electrically connected with the cable through the first circuit board, the cable is not directly connected with the first terminal, and the first terminal is protected from being damaged due to being pulled by the cable; furthermore, because the grounding terminal is arranged between two adjacent signal terminals in the first terminal, the signal interference between the two signal terminals can be effectively prevented; furthermore, the first terminal is surrounded by the shielding shell, and the joint of the first circuit board and the cable with the first circuit board is wrapped by the metal shell, so that all parts of the electric connector assembly for transmitting signals are shielded and protected, and the stability of transmitting high-frequency signals is facilitated.

[ description of the drawings ]

Fig. 1 is a perspective view of an electrical connector assembly of the present invention mated with a mating connector assembly;

fig. 2 is a side view of the electrical connector assembly of the present invention mated with a mating connector assembly;

fig. 3 is a perspective view of the electrical connector assembly of the present invention shown separated from the mating connector assembly;

fig. 4 is a perspective view of the electrical connector assembly of the present invention;

fig. 5 is a bottom view of the electrical connector assembly of the present invention;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a perspective view of a first circuit board, a first connector and a cable of the electrical connector assembly of the present invention;

fig. 8 is a partial exploded perspective view of the electrical connector assembly of the present invention;

FIG. 9 is a partially exploded perspective view of FIG. 8 from another direction;

fig. 10 is an exploded perspective view of a first connector of the electrical connector assembly of the present invention;

fig. 11 is an exploded perspective view of a second connector of the docking connector assembly of the present invention.

[ description of main reference symbols ]

Electrical connector assembly 100 first connector 12

Base 21 of insulating body 2

Through slot 211 annular abutment wall 22

The first terminal 31 of the docking slot 221

Fixing part 312 of abutting part 311

The holder 313 welds the part 314

Cylindrical part 41 of shield case 4

First grounding part 42 metal shell 5

Accommodating space 500 first plate part 51

Opening 511 and protruding plate 512

Side 513 outer extension 514

First clamping portion 515 second plate portion 52

Flat plate portion 521 crimping portion 522

Convex portion 523 and second clamping portion 524

Front claw 53 and rear catch 54

Clamping opening 55 insulating part 6

Cable, signal cable 7 core 71

Outer insulating layer 73 of shield layer 72

Mating connector assembly 400 second connector 13

Insulator 8 base 81

Abutting convex part 82 annular outer wall 83

Second terminal 32 contact portion 321

Welding leg 323 of hook part 322

Annular wall 91 of metal housing 9

Second ground pin 92 first space 200

Second space 300 signal terminal S

Ground terminal G first circuit board 301

First surface 3011 and second surface 3012

First contact x second contact y

Second circuit board 302

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

[ detailed description ] embodiments

Hereinafter, an embodiment of the electrical connector assembly 100 and the mating connector assembly 400 of the present invention will be described with reference to fig. 1 to 11.

Referring to fig. 1 to 11, the directions of the present invention are defined with reference to fig. 1, the mating direction of the first connector 12 and the second connector 13 is defined as the up-down direction, the horizontal direction perpendicular to the up-down direction and the front-back direction perpendicular to the up-down direction and the horizontal direction, and the cable 7 in fig. 1 is located at the rear end of the whole electrical connector assembly 10.

Referring to fig. 1 to 10, the electrical connector assembly 100 includes a first circuit board 301, a first connector 12 electrically connected to the first circuit board 301, a plurality of cables 7, an insulator 6 fixed on the first circuit board 301 and covering front ends of the plurality of cables 7, and a metal shell 5 sleeved outside the first circuit board 301.

Referring to fig. 4 to 10, the first connector 12 includes an insulative housing 2, ten first terminals 31 held in the insulative housing 2, and a shielding shell 4 held outside the insulative housing 2.

Referring to fig. 7, the insulating body 2 includes a base 21 and an annular abutting wall 22 having an abutting groove 221 and protruding upward from the base 21. Two through grooves 211 which penetrate through from top to bottom are formed in the front end and the rear end of the base 21.

Referring to fig. 4, 5, and 7 to 10, each of the first terminals 31 includes a fixing portion 312 fixed to the annular abutting wall 22, an abutting portion 311 extending from one end of the fixing portion 312 and exposed to the abutting groove 221, and a welding portion 314 extending from the other end of the fixing portion 312 to the base 21. The docking portion 311 is "U" shaped and formed with two docking points (not numbered). The first terminals 31 are arranged transversely, and two adjacent first terminals 31 are arranged symmetrically in the front-back direction. Both sides of the fixing portion 312 have laterally protruding catches 313 formed for catching the annular abutment wall 22. In the present embodiment, the ten first terminals 31 include four signal terminals S and six ground terminals G. The ten first terminals 31 are preferably arranged such that both outermost sides are signal terminals S, two other signal terminals S are disposed inside the two signal terminals S, and two ground terminals G are disposed between two adjacent signal terminals S, that is, for example: one signal terminal S, two ground terminals G, and one signal terminal S.

Referring to fig. 4 to 10, the shielding shell 4 is made of metal and is a frame. The shield case 4 includes a cylindrical portion 41 and first grounding portions 42 formed to extend laterally on both sides of the lower edge of the cylindrical portion 41.

The metal shell 5 includes a first plate portion 51 and a second plate portion 52 opposite to the first plate portion 51 and located above the first plate portion 51. The second plate portion 52 is folded upward from the front end of the first plate portion 51 to be engaged with the first plate portion 51. An accommodating space 500 for accommodating the first circuit board 301 and the first connector 12 is formed between the first plate 51 and the second plate 52. The first plate 51 includes an opening 511 and a protruding plate 512 behind the opening 511. The protruding plate portion 512 is formed to protrude outward from one end of the rear edge of the opening 511 in the front-rear direction. The protruding plate 512 has a side portion 513 extending toward the second plate portion 52 and an extending portion 514 extending from the end of the side portion 513. The extension portion 514 is located in the same horizontal plane as the edges of both lateral sides of the opening 511. The rear edge of the protruding plate portion 512 is formed with two first clamping portions 515. The second plate portion 52 includes a flat plate portion 521 and press-contact portions 522 located at two sides of the flat plate portion 521 and bent and extended toward the first plate portion 51. The flat plate portion 521 includes a plurality of convex portions 523 protruding into the accommodating space 500 and two second clamping portions 524 located at the rear edge of the flat plate portion 521. The two first clamping portions 515 and the two second clamping portions 524 are laterally spaced apart. Each of the first and

second clamping portions

515 and 524 includes a front claw portion 53 and a rear claw portion 54 provided in the front and rear direction. The front claw part 53 and the rear claw part 54 are formed by bending and are respectively provided with a clamping opening 55. The opening directions of the front claw part 53 and the rear claw part 54 of the first clamping part 515 are the same. The opening directions of the front claw part 53 and the rear claw part 54 of the second clamping part 524 are the same. The clamping openings 55 of the front and

rear claws

53 and 54 of the first clamping portion 515 are opposite to the clamping openings 55 of the front and

rear claws

53 and 54 of the second clamping portion 524.

The plurality of cables 7 are four signal cables 7. Each of the signal cables 7 includes a core 71 located at a central position, an inner insulating layer (not numbered) covering the core 71, a shielding layer 72 covering the inner insulating layer (not numbered), and an outer insulating layer 73 covering the shielding layer 72.

The first circuit board 301 includes a first surface 3011 and a second surface 3012 opposite to the first surface 3011. The first circuit board 301 includes eight first contacts x on the first surface 3011. The eight first contacts x are arranged in three rows in the front-rear direction on the first surface 3011. The number of the first contacts x in the front row and the middle row is two. The first contacts x of the next row are four. The eight first contacts x respectively electrically connect the four signal terminals S with the cores 71 of the corresponding four signal cables 7 one by one. The first and second surfaces 3011 and 3012 further include sixteen second contacts y. The sixteen second contacts y include three second contacts y respectively disposed on the first surface 3011 on both lateral sides, six second contacts y arranged in two rows in front and rear between the two second contacts y on both lateral sides, and two second contacts y respectively disposed on both lateral sides of the second surface 3012. The second contacts y arranged in the front row and the rear row are respectively arranged in the same row with the first contacts x close to the front row and the middle row. Referring to fig. 7, the arrangement of the two first contacts x and the three second contacts y near the front row is as follows: one first contact x, two second contacts y, one first contact x and one second contact y. The arrangement mode of the two first contacts x and the three second contacts y in the next row is as follows: one second contact y, one first contact x, two second contacts y and one first contact x. The latter row of four first contacts x is located between the two second contacts y at the rear end on both lateral sides of the first surface 3011.

In the electrical connector assembly 100 of the present invention, the insulative housing 2 and the shielding shell 4 are integrally injection molded. An annular second space 300 is formed between the annular abutting wall 22 of the insulating body 2 and the inner side surface of the cylindrical portion 41 of the shield case 4. The two through grooves 211 are defined by the cylindrical portion 41. The two through grooves 211 communicate with the second space 300. The first terminals 31 are respectively inserted into the annular butting wall 22 from bottom to top to form the first connector 12. When viewed in the vertical direction, the welding portions 314 of the first terminals 31 are arranged in two rows, and are surrounded by the cylindrical portion 41 and exposed in the through groove 211, so that the size of the first connector 12 is effectively reduced, the welding portions 314 of the first terminals 31 are uniformly stressed and are not easily detached, and the shielding shell 4 can better protect the first terminals 31 and provide better external signal shielding effect.

The first connector 12 is soldered to the first surface 3011 of the first circuit board 301. The four signal terminals S in the first terminal 31 are electrically connected to the four first contacts x near the front row and the middle row, respectively. Six ground terminals G of the first terminals 31 are electrically connected to six second contacts y arranged in front and rear rows, respectively. The first grounding portion 42 of the shielding shell 4 is electrically connected to four second contacts y disposed at two lateral sides of the first surface 3011. The wire cores 71 of the signal cable 7 are electrically connected to the four first contacts x in the next row respectively so as to transmit signals with the corresponding four signal terminals S. The insulation member 6 wraps the connection position of the wire core 71 and the first contact x to enhance welding stability and prevent short circuit.

A first circuit board 301 holding a first connector 12, four signal cables 7, and an insulator 6 is mounted on the inner surface of the first plate part 51 of the metal shell 5. The first surface 3011 of the first circuit board 301 faces the inner side surface of the first board body 51. The cylindrical portion 41 of the shield case 4 is exposed to the outside of the metal shell 5 from the opening 511 to be mated with the second connector 13. The positions where the four signal cables 7 are soldered to the first circuit board 301 and the insulating member 6 are covered with the protruding plate portion 512. The second plate portion 52 is bent to be fastened to the second surface 3012 of the first circuit board 301. The edges of the two lateral sides of the opening 511 and the two outward extending portions 514 of the protruding plate portion 512 abut against the six second contacts y on the two lateral sides of the first surface 3011. The press-connecting portion 522 of the second plate portion 52 is bent to clamp the edges of the two lateral sides of the opening 511 and the two outer extensions 514 of the protruding plate portion 512, so as to better ensure the electrical connection between the metal shell 5 and the second contact y of the first circuit board 301. At this time, the convex portions 523 of the flat plate portion 521 abut against the four second contact points y on the two lateral sides of the second surface 3012 of the first circuit board 301, so that the ground terminal G of the first terminal 31, the shielding shell 4 and the metal shell 5 are electrically connected by the second contact points y. The front claws 53 of the first and second holding

portions

515 and 524 are bent to hold the shield layer 72 fixed to the signal cable 7, so that the ground terminal G of the first terminal 31, the shield case 4, and the metal shell 5 are electrically connected to ground through the shield layer 72. The rear claws 54 of the first and second holding

portions

515 and 524 are bent to hold the outer insulating layer 73 fixed to the signal cable 7, thereby achieving the fixing effect. Since the first clamping portion 515 and the second clamping portion 524 are disposed at an interval and disposed on the first plate portion 51 and the second plate portion 52, the first plate portion 51 is effectively prevented from being separated from the second plate portion 52, and the four signal cables 7 are prevented from being detached from each other by force. The metal shell 5 can protect the components in the accommodating space 500 from being damaged by external impact, and has a better shielding function because the metal shell 5 is electrically connected to the shielding layer 72 of the signal cable 7.

Referring to fig. 11, the docking connector assembly 400 includes a second circuit board 302 and a second connector 13 electrically connected to the second circuit board 302. The second connector 13 includes an insulator 8, ten second terminals 32 held on the insulator 8, and a metal shell 9 held outside the insulator 8.

The insulator 8 includes a base 81, a mating protrusion 82 formed to protrude upward from the base 81, and an annular outer wall 83 provided around the mating protrusion 82. A first space 200 is formed between the abutment protrusion 82 and the annular outer wall 83.

The ten second terminals 32 are correspondingly fitted with the ten first terminals 31. Each of the second terminals 32 includes an n-shaped contact portion 321 exposed from the mating protrusion 82, a solder leg 323 bent from one end of the contact portion 321 and extending horizontally, and a hook portion 322 extending laterally from both sides of the other end of the contact portion 321 and embedded in the insulator 8. The second terminals 32 are arranged transversely, and two adjacent second terminals 32 are arranged symmetrically in the front-back direction.

The metal shell 9 includes an annular wall 91 and second grounding pins 92 formed by extending transversely at the lower edges of two sides of the annular wall 91.

The insulator 8 is integrally injection-molded with the second terminal 32 and the metal case 9. The annular wall portion 91 is held on the outer side surface of the annular outer wall 83. When viewed in the vertical direction, the solder tails 323 of the ten second terminals 32 are arranged in two rows and located inside the annular wall 91, so that the metal shell 9 protects the second terminals 32 and provides shielding, and the arrangement of the two rows of solder tails 323 can effectively prevent the second connector 13 from separating from the second circuit board 302.

When the first connector 12 and the second connector 13 are mated in the vertical direction, the mating protrusion 82 of the second connector 13 is inserted into the mating groove 221 so as to electrically connect the first terminal 31 and the second terminal 32. Two mating points (not numbered) of the first terminals 31 sandwich front and rear sides of the contact portions of the second terminals 32. The annular abutment wall 22 is fitted in the first space 200. The annular outer wall 83 and the annular wall 91 are inserted together into the second space 300, and the outer surface of the annular wall 91 and the inner surface of the cylindrical portion 41 are inserted together to be electrically connected to ground.

In other preferred embodiments, the first connector 12 of the electrical connector assembly 100 and the second connector 13 of the mating connector assembly 400 can be interchanged, and the object of the present invention can be achieved. The number of the first terminals 31 and the second terminals 32 can be increased or decreased, and it is only necessary to provide the ground terminal G between two adjacent signal terminals S.

Since the first connector 12 of the electrical connector assembly 100 is electrically connected to the cable 7 through the first circuit board 301, the cable 7 is not directly connected to the first terminal 31, so as to protect the first terminal 31 from being damaged by the cable 7. Furthermore, two ground terminals G are disposed between two adjacent signal terminals S in the first terminal 31, so that signal interference between the two signal terminals S can be effectively prevented. Furthermore, the first terminal 31 is surrounded by the shielding shell 4, the joint of the first circuit board 301 and the cable 7 with the first circuit board 301 is wrapped by the metal shell 5, and the shielding layer 72 is arranged on the periphery of the wire core 71 of the cable 7, so that all parts of the electric connector assembly 100 for transmitting signals are shielded and protected, and the stability of transmitting high-frequency signals is facilitated.

The above description is only a part of the embodiments of the present invention, and not all embodiments, and any equivalent variations of the technical solutions of the present invention, which are made by those skilled in the art through reading the present specification, are covered by the claims of the present invention.

Claims

1. An electrical connector assembly, comprising: the electric connector assembly comprises a first circuit board, a first connector and a plurality of cables, wherein the first connector and the plurality of cables are fixedly held on the circuit board, and a metal shell is fixedly held outside the first circuit board, the first connector comprises an insulating body, a plurality of first terminals and a shielding shell, the first terminals are fixedly held in the insulating body, the shielding shell is fixedly held outside the insulating body, the insulating body comprises a base and an annular butt joint wall, the annular butt joint wall protrudes upwards from the base and is provided with a butt joint groove, the first terminals at least comprise two signal terminals and a grounding terminal located between the two signal terminals, the first circuit board electrically connects the first terminals with the cables, and the metal shell accommodates the first circuit board and the first connector and is provided with an opening through which the first connector protrudes outwards.

2. The electrical connector assembly of claim 1, wherein: the metal shell comprises a first plate body part and a second plate body part opposite to the first plate body part, an accommodating space for accommodating the first circuit board and the first connector is formed between the first board body part and the second board body part, the opening is positioned on the first plate body part, the first plate body part comprises a protruding plate part which is positioned behind the opening and is protruded outwards, the two sides of the protruding plate part are provided with a side part extending towards the second plate body part and an extending part transversely bending and extending from the tail end of the side part, the extension part and the edges of the two transverse sides of the opening are positioned in the same horizontal plane, the second plate body part is formed by bending and extending the front end of the first plate body part, the second plate body part comprises a flat plate part and press-connection parts which are positioned at two sides of the flat plate part and bent and extended, and the press-connection parts are clamped at two lateral edges of the opening and the extension part.

3. The electrical connector assembly of claim 2, wherein: two through grooves which penetrate through the base of the insulating body up and down are arranged at the front end and the rear end of the base of the insulating body, a plurality of first terminals of the first connector comprise fixing parts which are fixedly held in the annular butt joint wall, U-shaped butt joint parts which extend from one ends of the fixing parts and are exposed in the butt joint grooves, and welding parts which extend from the other ends of the fixing parts, two adjacent first terminals are arranged in a reverse symmetry mode in the front-back direction, the welding parts of the plurality of first terminals are exposed in the two through grooves, the shielding shell comprises a cylindrical part which is annularly arranged around the annular butting wall and a first grounding part which is positioned at the lower edge of the cylindrical part and transversely extends to form, the cylindrical portion surrounds the two through grooves to accommodate the welding portion of the first terminal in the shielding shell, and the first connector portion is exposed out of the metal shell through the opening.

4. The electrical connector assembly of claim 3, wherein: the first circuit board comprises a plurality of first contacts which are positioned on the first surface and used for electrically connecting the signal cables with the signal terminals of the first connector.

5. The electrical connector assembly of claim 4, wherein: a plurality of signal cables all include sinle silk, the parcel that is located central point and puts the internal insulation layer, the parcel of sinle silk the shielding layer and the parcel of internal insulation layer the external insulation layer of shielding layer, sinle silk electric connection in first contact point, the trailing edge of protruding board portion is formed with a plurality of first clamping parts, the trailing edge of second board somatic part is formed with a plurality of second clamping parts, a plurality of first centre grippings with a plurality of second clamping parts set up in the horizontal direction at interval side by side, a plurality of first clamping parts and a plurality of second clamping parts all correspond the centre gripping the shielding layer and the external insulation layer of a plurality of signal cables, first clamping part and second clamping part all have the clamping mouth, the clamping mouth of first clamping part with the opposite direction of the clamping mouth of second clamping part.

6. The electrical connector assembly of claim 5, wherein: the first circuit board is provided with a plurality of second contacts positioned on the first surface and the second surface, the grounding terminal, the first grounding part, the edges of two transverse sides of the opening and the extending parts are electrically connected with the plurality of second contacts positioned on the first surface, the flat plate part comprises a convex part protruding into the accommodating space, and the convex part and the grounding part of the shielding shell are electrically connected with the plurality of second contacts positioned on the second surface.

7. The electrical connector assembly of claim 2, wherein: the electric connector assembly further comprises an insulating piece, and the insulating piece wraps the electric connection part of the cables and the first circuit board.

8. A mating connector assembly for mating with the electrical connector assembly of claim 1, wherein: the butting connector assembly comprises a second circuit board and a second connector electrically connected with the second circuit board, the second connector comprises an insulator, a plurality of second terminals fixedly held on the insulator and a metal shell fixedly held outside the insulator, the plurality of second terminals and the metal shell are integrally formed in an injection molding mode, the insulator comprises a base, a butting convex portion and an annular outer wall, the butting convex portion protrudes upwards from the base, the annular outer wall is annularly arranged on the peripheral side of the butting convex portion, a first space for inserting and matching the annular butting wall is formed between the butting convex portion and the annular outer wall, and the metal shell comprises an annular wall portion fixedly held on the outer side of the annular butting wall and a second grounding portion located on the lower edge of the annular wall portion and extending transversely.

9. The mating electrical connector assembly of claim 8, wherein: the second terminals comprise n-shaped contact parts exposed out of the butt joint convex parts and welding pins formed by bending and extending one ends of the contact parts, the two adjacent second terminals are oppositely and symmetrically arranged in the front-back direction, and hook parts embedded in the insulator are formed by respectively extending the two transverse sides of the other end of the contact in the transverse direction.

10. The mating electrical connector assembly of claim 8, wherein: a second space is formed between the annular butting wall and the shielding shell, when the electric connector assembly is butted with the butting connector assembly, the butting convex part of the butting connector assembly is inserted into the butting groove so as to enable the first terminal to be electrically connected with the second terminal, the annular outer wall and the annular wall part are jointly inserted into the second space, and the outer side surface of the annular wall part and the inner side surface of the cylindrical part are inserted into the common grounding electric connection.