Electric connector, electric connector assembly and electric connector system

Abstract

An electric connector assembly comprises a circuit board, an electric connector installed on the circuit board, and a first connector and a second connector which are respectively connected with the electric connector from two sides of the circuit board. The electric connector comprises an insulating shell, a plurality of terminal pairs and grounding shielding pieces, the terminal pairs are fixedly held in the insulating shell and arranged in rows and columns, the grounding shielding pieces are fixedly held in the insulating shell and arranged around the terminal pairs, and the insulating shell is provided with a plurality of through holes penetrating through the insulating shell. The first terminal comprises a first elastic arm and a second elastic arm which are respectively exposed from the two sides of the through hole, and the second terminal comprises a third elastic arm and a fourth elastic arm which are respectively exposed from the two sides of the through hole. The first elastic arm, the third elastic arm, the second elastic arm and the fourth elastic arm are arranged in a mirror symmetry manner with respect to the plane where the circuit board is located. The electric connector assembly is stable in signal transmission, effectively controls crosstalk, and is relatively simple in structure.

Description

Technical Field This invention relates to an electrical connector, an electrical connector assembly, and an electrical connector system, and more particularly to an electrical connector, an electrical connector assembly, and an electrical connector system for transmitting high-speed differential signals. Background Technology US Patent 11616313B discloses a structure for connecting cable conductors to signal pads disposed in a signal layer of a board, wherein each conductor is laser-welded to a support via, and the support via is connected to the signal pad via a short trace. A base can be provided to connect the cable shielding layer to a grounding pad or ground plane on the board. US Patent 10594085B2 discloses a communication system including a circuit board assembly, a first connector assembly configured to connect to one side of the circuit board assembly, and a second connector assembly configured to connect to the opposite side of the circuit board assembly. The circuit board assembly is used to electrically connect the first connector assembly and the second connector assembly. The circuit board assembly includes a circuit board, a first plug connector mounted on one side of the circuit board and connected to the first connector assembly, and a second plug connector mounted on the other side of the circuit board and connected to the second connector assembly. The first and second plug connectors each include a housing and a plurality of electrical contacts. The circuit board has conductive vias, and the plug contacts of the first and second plug connectors are received in the same conductive vias to define a signal path directly through the circuit board. The first and second plug connectors are connected via conductive vias, which is detrimental to the stability of signal transmission and results in a more complex structure. Therefore, an improved connector design is necessary. Summary of the Invention The main objective of this invention is to provide an improved electrical connector that provides stable signal transmission, effectively controls crosstalk, and has a simple structure.

[0001] To achieve the above objectives, the present invention can adopt the following technical solution: an electrical connector that can be installed in a frame, the electrical connector being connected to mating connectors on both sides of the frame, the electrical connector including an insulating shell, a plurality of terminals fixed in the insulating shell, and a plurality of grounding shields fixed in the insulating shell, the terminals being arranged in pairs including a first terminal and a second terminal for transmitting a pair of differential signals, the grounding shields being arranged around the first terminal and the second terminal, the insulating shell having a plurality of through holes penetrating the insulating shell, the first terminal including a first elastic arm and a second elastic arm exposed from both sides of the through holes, the second terminal including a third elastic arm and a fourth elastic arm exposed from both sides of the through holes, the first elastic arm and the third elastic arm being mirror-symmetrically arranged with respect to the plane of the frame.

[0002] Another major objective of this invention is to provide an improved electrical connector assembly that has stable signal transmission and a simple structure.

[0003] To achieve the above objectives, the present invention can adopt the following technical solution: an electrical connector assembly, comprising a circuit board, an electrical connector mounted to the circuit board, and a first connector and a second connector connected to the electrical connector. The circuit board includes a first side and a second side opposite to the first side. The first connector and the second connector are respectively connected to the electrical connector from the first side and the second side. The electrical connector includes an insulating housing, a plurality of terminal pairs arranged in rows and columns fixed in the insulating housing, and a grounding shield fixed in the insulating housing surrounding the terminal pairs. The terminal pairs include a first terminal and a second terminal for transmitting a pair of differential signals. The insulating housing has a plurality of through holes penetrating the insulating housing. The first terminal includes a first elastic arm and a second elastic arm exposed from both sides of the through holes. The second terminal includes a third elastic arm and a fourth elastic arm exposed from both sides of the through holes. The first elastic arm and the third elastic arm are mirror-symmetrically arranged with respect to the surface of the circuit board.

[0004] Another major objective of this invention is to provide an improved electrical connector system that has stable signal transmission and a simple structure.

[0005] To achieve the above objectives, the present invention can adopt the following technical solution: An electrical connector system, comprising an organizer and a plurality of electrical connector assemblies that can be held on the organizer, the organizer including a first side and a second side opposite to the first side, each of the electrical connector assemblies including an electrical connector disposed on the organizer, and a first connector and a second connector respectively connected to the electrical connector from the first side and the second side of the organizer, the electrical connector including an insulating housing, a plurality of terminals fixed in the insulating housing, and a plurality of grounding shields fixed in the insulating housing, the terminals being arranged in pairs including a first terminal and a second terminal for transmitting a pair of differential signals, the grounding shields being disposed around the first terminal and the second terminal, the insulating housing having a plurality of through holes penetrating the insulating housing, the first terminal including a first elastic arm and a second elastic arm exposed from both sides of the through holes respectively, the second terminal including a third elastic arm and a fourth elastic arm exposed from both sides of the through holes, the first elastic arm and the third elastic arm and the second elastic arm and the fourth elastic arm being arranged in a mirror symmetry with respect to the surface of the organizer.

[0006] Compared with the prior art, the advantages of the present invention are: the electrical connector of the present invention is connected to the mating connectors on both sides through symmetrical elastic arms, which ensures stable signal transmission, effectively controls crosstalk, and has a simple structure. Attached Figure Description Figure 1 This is a perspective view of the electrical connector assembly of the present invention, wherein the circuit board is not shown.

[0007] Figure 2 yes Figure 1 An exploded view of the electrical connector assembly shown.

[0008] Figure 3 yes Figure 1 The diagram shows a 3D view and a magnified partial view of the electrical connector.

[0009] Figure 4 yes Figure 3 A perspective view of the electrical connector from another angle.

[0010] Figure 5 yes Figure 3 The diagram shows a perspective view and a partial enlarged view of the electrical connector, in which the insulating shell has been removed.

[0011] Figure 6 yes Figure 4 The diagram shows a perspective view and a partial enlarged view of the electrical connector from another angle, in which the insulating shell has been removed.

[0012] Figure 7 yes Figure 4 A perspective view of a pair of terminals of the electrical connector shown.

[0013] Figure 8 yes Figure 2 A perspective view of the first connector shown.

[0014] Figure 9 yes Figure 8 A further exploded view of the first connector shown.

[0015] Figure 10 yes Figure 9 A perspective view of the two terminal modules of the first connector shown.

[0016] Figure 11 yes Figure 10 A perspective view of the two terminal modules of the first connector from another angle.

[0017] Figure 12 yes Figure 10 A perspective view of one terminal module of the first connector shown.

[0018] Figure 13 yes Figure 12A further exploded view of the terminal module of the first connector shown.

[0019] Figure 14 yes Figure 13 An exploded view and a partial enlarged view of the terminal module of the first connector shown from another perspective.

[0020] Figure 15 yes Figure 14 An exploded view of the terminal module of the first connector shown.

[0021] Figure 16 yes Figure 1 The diagram shows a perspective view and a partial enlarged view of the electrical connector assembly, in which the insulating housings of the electrical connector, the first connector, and the second connector have been removed.

[0022] Figure 17 yes Figure 1 The diagram shows a partial cross-sectional view of the electrical connector assembly along the AA direction.

[0023] Figure 18 This is a schematic diagram showing the connection of one terminal module of the first connector and one terminal module of the second connector through the terminals of the electrical connector.

[0024] Figure 19 yes Figure 18 A side view of a terminal module of the first connector and a terminal module of the second connector in the electrical connector assembly shown, connected by the terminals of the electrical connector.

[0025] Figure 20 This is a simplified schematic diagram of an electrical connector system. Detailed Implementation Please see Figures 1 to 20 The diagram illustrates an electrical connector assembly 1000 according to an embodiment of the present invention. The electrical connector assembly 1000 includes a circuit board (not shown), an electrical connector 200 mounted to the circuit board, and a first connector 100 and a second connector 300 connected to the electrical connector 200. The circuit board includes a first side and a second side opposite to the first side. The first connector 100 and the second connector 300 are respectively connected to the electrical connector 200 from the first side and the second side. Both the first connector 100 and the second connector 300 are cable connectors.

[0026] Please see Figures 3 to 7As shown, the electrical connector 200 includes an insulating housing 201, a plurality of terminals 210 fixed in the insulating housing 201, and a grounding shield 220 fixed in the insulating housing 201. The plurality of terminals 210 are arranged in pairs, including multiple pairs of first terminals 211 and second terminals 212 for transmitting differential signals. The insulating housing 201 includes a central wall 202 and four side walls 203 disposed around the central wall 202. The central wall 202 and the four side walls 203 together enclose a first receiving space 204a that mates with the first connector 100 and a second receiving space 204b that mates with the second connector 300. The central wall 202 is provided with paired through holes 205 for fixing the terminals 210. The first terminals 211 and second terminals 212 have the same structure and are arranged opposite to each other. The first terminal 211 includes a first main body portion 2111 fixed in the through hole 205, a second main body portion 2112 fixed in the through hole 205 and extending from the side edge of the first main body portion 2111, a first elastic arm 2113 extending upward at an angle to one side of the first main body portion 2111 and exposed in the first receiving space 204a, and a second elastic arm 2114 extending upward at the same angle to the other side of the first main body portion 2111 and exposed in the second receiving space 204b. The second terminal 212 includes a first main body 2121 fixed in the through hole 205, a second main body 2122 fixed in the through hole 205 and extending from the side edge of the first main body 2121, a third elastic arm 2123 extending downward at an angle to one side of the first main body 2121 and exposed in the first receiving space 204a, and a fourth elastic arm 2124 extending downward at the same angle to the other side of the first main body 2121 and exposed in the second receiving space 204b. The first elastic arm 2113 and the third elastic arm 2123 are mirror-symmetrically arranged with respect to the plane where the intermediate wall 202 is located.

[0027] The free ends of the first elastic arm 2113 and the third elastic arm 2123 are provided with a first mating portion 2115 and a second mating portion 2125 respectively connected to the first connector 100. Both the first mating portion 2115 and the second mating portion 2125 are located in a plane parallel to the intermediate wall 202. The free ends of the second elastic arm 2114 and the fourth elastic arm 2124 are provided with a third mating portion 2116 and a fourth mating portion 2126 connected to the second connector 300. Both the third mating portion 2116 and the fourth mating portion 2126 are located in a plane parallel to the intermediate wall 202.

[0028] The perforations 205 are arranged in multiple rows and columns on the intermediate wall 202, and multiple pairs of terminals 210 are arrayed in multiple rows and columns within the perforations 205. In this embodiment, the terminals 210 are arranged in a square with 12 rows and 12 columns. In other embodiments, they can also be arranged in a 3*3, 6*6, or 8*8 pattern, and this application does not limit this. The grounding shield 220 includes multiple first grounding shields 221 and second grounding shields 222 arranged in rows and columns. The multiple first grounding shields 221 and second grounding shields 222 form multiple shielding cavities surrounding each pair of terminals 210. In this embodiment, the grounding shield 220 includes 11 first grounding shields 221 arranged laterally and 13 second grounding shields 222 arranged longitudinally. Except for the terminals 210 in the first and last rows which are surrounded by the first grounding shields 221 and the second grounding shields 222 in three directions, the remaining terminals 210 are surrounded by the first grounding shields 221 and the second grounding shields 222 in four directions. The first grounding shield 221 includes a plurality of first mating tabs 223a protruding into the first receiving space 204a and second mating tabs 223b protruding into the second receiving space 204b. The intermediate wall 202 is provided with a plurality of channels 206 located on both sides of each pair of terminals 210 penetrating the intermediate wall 202. The second grounding shield 222 is provided with a first contact spring 224a and a second contact spring 224b exposed in the channels. The first contact spring 224a and the second contact spring 224b are arranged vertically along the longitudinal direction of the second grounding shield 222. The first contact spring 224a is provided with a first contact protrusion 225a protruding towards a terminal on one side, and the second contact spring 224b is provided with a second contact protrusion 225b protruding towards a terminal on the other side.

[0029] The first connector 100 and the second connector 300 have substantially the same structure. The following detailed description will take the first connector 100 as an example.

[0030] Please see Figures 8 to 15As shown, the first connector 100 includes an insulating shell 101 and a plurality of terminal modules 102 stacked vertically within the insulating shell 101. Each terminal module 102 includes an insulating body 110, a plurality of signal terminals 120 integrally formed with the insulating body 110, a grounding element 130, and cables 140 extending along a first direction corresponding to and connected to the signal terminals 120 and the grounding element 130. The plurality of signal terminals 120 are arranged in pairs along a second direction perpendicular to the first direction, including a first signal terminal 121 and a second signal terminal 122 for transmitting a pair of differential signals. In this embodiment, the first connector 100 has 12 terminal modules stacked vertically, each terminal module 102 including 12 pairs of signal terminals. In other embodiments, the number of terminal modules 102 and the number of signal terminals 120 can be designed according to specific requirements. The grounding element 130 includes a plurality of grounding plates 131 disposed on both sides of each pair of signal terminals 120 and a common ground plate 132 connected to the plurality of grounding plates 131. The cable 140 includes a plurality of groundless biaxial cables 141 arranged in a row. Each biaxial cable 141 includes two signal conductors 1411 connected to each pair of signal terminals 120 and a conductive layer 1412 disposed outside the two signal conductors 1411 and electrically connected to the grounding plate 131.

[0031] The insulating body 110 includes a main body 111 that holds the signal terminal 120 and the grounding piece 131, and two side portions 112 disposed on both sides of the main body. The signal terminal 120 includes a first contact portion 1201 connected to the signal conductor 141 and a second contact portion 1202 disposed at an angle to the first contact portion 1201 and connected to the electrical connector 200. The first contact portion 1201 and the second contact portion 1202 are completely embedded in the main body 111 and are both located in the same plane perpendicular to the first direction. The first contact portion 1201 has a circular through-hole structure. After the signal conductor 1411 passes through the through-hole, the signal conductor 1411 is mechanically and electrically connected to the first contact portion 1201 by laser welding. The second contact portion 1202 is elongated. The second contact portions 1202 and 1203 of the two signal terminals 120 arranged in pairs are parallel to each other and extend obliquely from the first contact portion 1201 in opposite directions. In this way, the design of the signal terminal maximizes space utilization. The contact between the signal conductor 1411 and the first contact portion 1201 of the signal terminal 120 is naturally matched. Moreover, if the spacing between the two signal conductors needs to be reduced according to design requirements, this design can also meet the requirements.

[0032] Each grounding plate 131 includes a first grounding portion 1311 and a second grounding portion 1312. The first grounding portion 1311 extends from one side of the insulating body 110 in the mating direction and extends beyond the signal terminal 120. The second grounding portion 1312 extends from the other side of the insulating body in the cable direction and connects to the common ground plate 132. The common ground plate 132 includes a first common ground plate 1321 and a second common ground plate 1322 respectively disposed on the upper and lower sides of the biaxial cable 141. The first common ground plate 1321 and the second common ground plate 1322 are respectively held by an insulating block and have the same structure. Each of them includes a plurality of spaced sub-common ground plates 1323 and a base 1324 connecting each of the sub-common ground plates. Each of the sub-grounding plates 1323 is disposed between two adjacent second grounding portions 1312. The base 1324 has outwardly protrusions 1325 on both sides. The two sides 112 of the insulating body 110 have grooves 113 that can receive the protrusions 1324. The first grounding plate 1321 and the second grounding plate 1322 are fixed to the insulating body 110 through the engagement of the protrusions 1325 and the grooves 113. Each second grounding portion 1312 has two upper and lower sliding grooves 1313 on both its inner and outer sides. The two sides of each sub-grounding plate 1323 enter the sliding grooves of two adjacent second grounding portions 1312 for connection.

[0033] like Figure 14 , 15As shown, the biaxial cable 141 includes a first conductive sheet 1413 and a second conductive sheet 1414 connected to the conductive layer 1412. The first conductive sheet 1413 extends from the middle position of the upper side of the conductive layer 1412 toward the main body 111, folds upward, and continues to extend toward the cable direction, forming a U-shaped structure with a first opening 1423. The sub-ground sheet 1323 of the first ground sheet 1321 enters through the first opening 1423 to connect with the first conductive sheet 1413. The second conductive sheet 1414 extends from the middle position of the lower side of the conductive layer 1412 toward the main body 111, folds downward, and continues to extend toward the cable direction, forming a U-shaped structure with a second opening. The sub-ground sheet 1323 of the second ground sheet 1322 enters through the second opening to connect with the second conductive sheet 1414. The first conductive sheet 1413 and the second conductive sheet 1414 can be integrally manufactured with the conductive layer 1412, or they can be manufactured separately and then connected together. The conductive layer 1412, the first conductive sheet 1413, and the second conductive sheet 1414 are made of copper foil or aluminum foil. The connection between the sub-ground plate 1323 and the 1413 and the second conductive sheet 1414 can be through abutment contact or laser welding. Thus, the second grounding portion 1312 of the grounding plate 131 and the first and second grounding plates 1321 and 1322 form multiple rectangular shielding spaces surrounding each pair of signal conductors 1411, reducing crosstalk at that location.

[0034] like Figure 10 , 11 As shown, each terminal module 102 has a structure on its side 112 of the insulating body 110 that can be fixed to the insulating bodies of adjacent terminal modules. Specifically, the upper side of the side 112 is provided with a positioning post 114 and a limiting block 115, and the lower side is provided with a positioning hole 116 and a limiting groove 117. When multiple terminal modules 102 are stacked on top of each other, the positioning post 114 and the limiting block 115 on the upper side are respectively fixedly installed in the positioning hole 116 and the limiting groove 117 of the adjacent upper terminal module, and the positioning hole 116 and the limiting groove 117 on the lower side receive the positioning post 114 and the limiting block 115 of the adjacent lower terminal module. In this way, each terminal module 102 is tightly assembled together row by row and kept in the correct position. The insulating body 110 has inwardly recessed structures on its upper and lower sides corresponding to the signal terminal 120. When multiple terminal modules 102 are stacked vertically, the recesses of two adjacent terminal modules 102 form rectangular slots 118. Figure 8 and Figure 16 As shown.

[0035] Please see Figure 16-19As shown, the structure of the second connector 300 is identical to that of the first connector 100, except that the positions of the first grounding portion 1311 of the first connector 100 and the first grounding portion 3311 of the second connector 300 are offset. Therefore, the structural description of the second connector 300 will not be repeated here. When the electrical connector 200 is mated with the first connector 100 and the second connector 300, the first mating portion 2115 and the second mating portion 2125 on one side of the electrical connector 200 abut against the second contact portions 1202 and 1203 of the first connector 100, and the third mating portion 2116 and the fourth mating portion 2126 on the other side abut against the second contact portions 3202 and 3203 of the second connector 300. The first ground portion 1311 of the first connector 100 and the first ground portion 3311 of the second connector 300 both extend from opposite directions into the same channel 206 of the intermediate wall of the electrical connector 200, and are respectively connected to the first contact protrusion 225a of the first contact spring 224a and the second contact protrusion 225a of the second contact spring 224b, thus establishing a longitudinal shielding wall between each pair of high-speed differential signals in the longitudinal direction. The first mating protrusion 223a of the first grounding shield 221 of the electrical connector 200 extends into the rectangular slot 118 between adjacent terminal modules 102 of the first connector 100, and the second mating protrusion 223b extends into the rectangular slot 318 between adjacent terminal modules 302 of the second connector 300, thus establishing a transverse shielding wall between each pair of high-speed differential signals in the transverse direction. Therefore, except for the first and last pairs of high-speed differential signals which are surrounded by transverse and longitudinal shielding walls in three directions, the remaining pairs of high-speed differential signals are completely surrounded by shielding boxes formed by longitudinal and transverse shielding walls in four directions, effectively controlling crosstalk and noise.

[0036] like Figure 20 As shown, in other embodiments, the circuit board 500 can be a large circuit board holding multiple electrical connectors 200'. These electrical connectors have the structure of electrical connectors as described above, but can be designed with different differential signal pairs and arrangements as needed. Multiple cable connectors 100' are respectively connected to the multiple electrical connectors from both sides of the circuit board. Other electrical components can also be designed on the circuit board 500 as needed. In another embodiment, the circuit board can be replaced with a frame. Alternatively, in another embodiment, instead of using a circuit board or frame to hold the connection between the electrical connector and the cable connectors on both sides, the electrical connector can be designed as a large electrical connector that can connect multiple cable connectors on both sides simultaneously. The insulating shell of this large electrical connector directly acts as an organizer, replacing the organizing and integrating functions of the circuit board or frame.

[0037] The symmetrical elastic arm design of the electrical connector in this invention connects to two cable connectors on both sides, ensuring stable signal transmission. The structure is relatively simple, effectively improving space utilization. In practical use, it facilitates replacement if the electrical connector is damaged. The electrical connector, connector assembly, and connector system of this invention can be used within a rack unit of a server, switch, or any data center. Furthermore, it can not only be used within a single rack unit but also span different rack units and different layers to build electronic systems, integrating the wiring of the entire system. Therefore, it should be understood that the electrical connector and its assembly, as well as the system incorporating such assembly, can be flexibly used in many different applications.

[0038] However, it is understood that although many features and advantages of the invention have been mentioned in the foregoing description, including some structural and functional details, this disclosure is illustrative and many details may be changed, especially in terms of the shape, size and arrangement of components within the scope of the principles as indicated by the broad general meaning of the terms set forth in the appended claims.

Claims

1. An electrical connector, which can be mounted in a frame, the electrical connector being connectable to mating connectors on both sides of the frame, the electrical connector comprising an insulating housing, a plurality of terminals held in the insulating housing, and a plurality of grounding shields held in the insulating housing, the terminals being arranged in pairs including a first terminal and a second terminal for transmitting a pair of differential signals, the grounding shields being disposed around the first terminal and the second terminal, the insulating housing having a plurality of through holes penetrating the insulating housing, characterized in that: The first terminal includes a first elastic arm and a second elastic arm exposed from both sides of the perforation, and the second terminal includes a third elastic arm and a fourth elastic arm exposed from both sides of the perforation. The first elastic arm and the third elastic arm are arranged in a mirror symmetric manner with respect to the plane on which the frame is located.

2. The electrical connector as described in claim 1, characterized in that: The insulating housing includes a middle wall and side walls disposed around the middle wall. The middle wall and side walls together enclose a first receiving space that can mate with a connector and a second receiving space that can mate with another connector. A through hole is disposed on the middle wall. The first elastic arm and the third elastic arm are exposed from one end of the through hole into the first receiving space, and the second elastic arm and the fourth elastic arm are exposed from the other end of the through hole into the second receiving space.

3. The electrical connector as described in claim 1, characterized in that: Both the first terminal and the second terminal include a first main body portion fixed in the through hole and a second main body portion fixed in the through hole, which extends from the side edge of the first main body portion. The first elastic arm and the second elastic arm extend from both sides of the first main body portion at the same angle to opposite directions. The third elastic arm and the fourth elastic arm extend from both sides of the corresponding first main body portion at the same angle to opposite directions. The first elastic arm and the third elastic arm extend from one end of the through hole at an angle to opposite directions. The second elastic arm and the fourth elastic arm extend from the other end of the through hole at an angle to opposite directions.

4. The electrical connector as described in claim 2, characterized in that: The grounding shield includes a plurality of first grounding shields and second grounding shields arranged in rows and columns, respectively. The plurality of first grounding shields and second grounding shields form a plurality of spaced-apart shielding cavities that surround each pair of terminals. The first grounding shields are provided with a plurality of first mating tabs protruding into the first receiving space and second mating tabs protruding into the second receiving space.

5. The electrical connector as described in claim 4, characterized in that: The intermediate wall is provided with a plurality of channels that penetrate the intermediate wall on both sides of each pair of terminals, and the second grounding shield is provided with a first contact spring and a second contact spring that are exposed in the channels and protrude to both sides respectively.

6. An electrical connector assembly comprising a circuit board, an electrical connector mounted to the circuit board, and a first connector and a second connector connected to the electrical connector, the circuit board including a first side and a second side opposite to the first side, the first connector and the second connector being connected to the electrical connector from the first side and the second side respectively, the electrical connector including an insulating housing, a plurality of terminal pairs arranged in rows and columns fixed in the insulating housing, and a grounding shield fixed in the insulating housing surrounding the terminal pairs, the terminal pairs including a first terminal and a second terminal for transmitting a pair of differential signals, the insulating housing having a plurality of through holes penetrating the insulating housing, characterized in that: The first terminal includes a first elastic arm and a second elastic arm exposed from both sides of the through hole, and the second terminal includes a third elastic arm and a fourth elastic arm exposed from both sides of the through hole. The first elastic arm and the third elastic arm are arranged in a mirror symmetrical manner with respect to the surface of the circuit board.

7. The electrical connector assembly as claimed in claim 6, characterized in that: The first and third elastic arms are respectively provided with a first mating portion and a second mating portion at their ends, which are connected to the first connector. Both the first and second mating portions are located in the same plane parallel to the circuit board. The second and fourth elastic arms are respectively provided with a third mating portion and a fourth mating portion at their ends, which are connected to the second connector. Both the third and fourth mating portions are located in the same plane parallel to the circuit board. Both the first and second connectors include multiple stacked terminal modules. Each terminal module includes an insulating body, multiple signal terminals and a grounding component fixed to the insulating body, and a component extending along a first direction electrically connected to the signal terminals and the grounding component. The cable, wherein the grounding component includes a plurality of grounding plates respectively disposed on both sides of each pair of signal terminals and a common grounding plate connecting the plurality of grounding plates, the signal terminal includes a first contact portion connected to the cable and a second contact portion connected to the electrical connector, the first contact portion and the second contact portion of the first connector are both located in the same plane perpendicular to the first direction, and the second contact portion of each pair of signal terminals is correspondingly connected to the first mating portion and the second mating portion of the electrical connector, the first contact portion and the second contact portion of the second connector are both located in the same plane perpendicular to the first direction, and the second contact portion is correspondingly connected to the third mating portion and the fourth mating portion of the electrical connector.

8. The electrical connector assembly as claimed in claim 7, characterized in that: The grounding shield of the electrical connector includes a plurality of first grounding shields and second grounding shields arranged in rows and columns around each pair of terminals. The grounding shields of the first connector and the second connector each include a first grounding portion extending beyond the signal terminal and extending in the direction of mating with the electrical connector. A slot is provided between the insulating bodies of adjacent sides of adjacent terminal modules of the first connector and the second connector. When the first connector and the second connector are connected to the electrical connector, the first grounding portion of the first connector and the first grounding portion of the second connector are respectively connected to the two sides of the corresponding second grounding shield. One end of the first grounding shield of the electrical connector extends into the slot of the first connector, and the other end extends into the slot of the second connector.

9. An electrical connector system comprising an organizer and a plurality of electrical connector assemblies retainable on the organizer, the organizer including a first side and a second side opposite to the first side, each of the electrical connector assemblies including an electrical connector disposed on the organizer, and a first connector and a second connector respectively connected to the electrical connector from the first side and the second side of the organizer, the electrical connector including an insulating housing, a plurality of terminals held in the insulating housing, and a plurality of grounding shields held in the insulating housing, the terminals being arranged in pairs including a first terminal and a second terminal for transmitting a pair of differential signals, the grounding shields being disposed around the first terminal and the second terminal, the insulating housing having a plurality of through-holes, characterized in that: The first terminal includes a first elastic arm and a second elastic arm exposed from both sides of the perforation, and the second terminal includes a third elastic arm and a fourth elastic arm exposed from both sides of the perforation. The first elastic arm and the third elastic arm are arranged in a mirror symmetrical manner with respect to the surface where the tissue is located.

10. The electrical connector system as claimed in claim 9, characterized in that: The organizer directly forms the insulating shell of the electrical connector.

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