Electrical connector and connector assembly

Abstract

The application discloses an electric connector and a connector combination, the electric connector comprising: a plurality of first conductive terminals arranged along the left-right direction, the first conductive terminals having a first contact part, a first connecting part and a first lead-in part connected in sequence, the first contact part being located in front of the first lead-in part, the plurality of first conductive terminals comprising a first differential signal pair, a first ground terminal and a second differential signal pair arranged in sequence, the first contact part of the first differential signal pair and the first contact part of the second differential signal pair being arranged staggered along the front-back direction, the first contact part of the first ground terminal being between the first contact parts of the two, and the first lead-in part of the first differential signal pair and the first lead-in part of the second differential signal pair being arranged staggered along the front-back direction, the first lead-in part of the first ground terminal being between the first lead-in parts of the two, the distance between the signal pairs being enlarged, thereby reducing crosstalk and improving high frequency.

Description

Technical Field

[0001] This invention relates to an electrical connector and connector assembly, and more particularly to an electrical connector and connector assembly for improving high-frequency operation. Background Technology

[0002] An existing electrical connector includes a first insulator and a plurality of first conductive terminals disposed on the first insulator. Each first conductive terminal has a first contact portion, a first conductive portion, and a first connecting portion connecting the first contact portion and the first conductive portion. The plurality of first conductive terminals include two differential signal pairs arranged adjacent to each other in a left-right direction. The plurality of first contacts of the two adjacent differential signal pairs are aligned in a left-right direction. The plurality of first conductive portions of the two adjacent differential signal pairs are aligned in a left-right direction. The plurality of first connecting portions of the two adjacent differential signal pairs are aligned in a left-right direction.

[0003] In the above structure, multiple first conductive terminals are arranged in a row. The shortest distance between two adjacent differential signal pairs is determined by the pitch and molding process. Therefore, the crosstalk improvement is limited and the electromagnetic crosstalk between two adjacent differential signal terminals cannot be reduced according to actual needs, affecting the high-frequency performance of the electrical connector.

[0004] Therefore, it is necessary to design a new electrical connector and connector combination to overcome the above problems. Summary of the Invention

[0005] To address the problems of the prior art, the present invention aims to provide a new electrical connector and connector assembly. By providing at least one ground terminal in two adjacent differential signal pairs to shield the differential signal pairs on their left and right sides, and by sequentially staggering the contact portions and conductive portions of the first differential signal pair, the ground terminal, and the second differential signal pair in the front-middle-rear direction, the distance between two adjacent differential signal pairs is increased, thereby reducing crosstalk between two adjacent differential signal pairs and achieving the effect of improving high frequency.

[0006] To achieve the above objectives, the present invention provides an electrical connector, comprising: a first insulator; a plurality of first conductive terminals arranged in a left-right direction and disposed on the first insulator, each first conductive terminal having a first contact portion, a first conductive portion, and a first connecting portion connecting the first contact portion and the first conductive portion, the first contact portion being located in front of the first conductive portion; the plurality of first conductive terminals including a first differential signal pair and a second differential signal pair, and a ground terminal unit located between the first differential signal pair and the second differential signal pair, the ground terminal unit being disposed adjacent to the first differential signal pair and the second differential signal pair respectively, the ground terminal unit including at least one first ground terminal; the plurality of first contact portions of the first differential signal pair being offset forward relative to the first contact portion of the first ground terminal, the plurality of first conductive portions of the first differential signal pair being offset forward relative to the first conductive portion of the first ground terminal, the plurality of first contact portions of the second differential signal pair being offset backward relative to the first contact portion of the first ground terminal, and the plurality of first conductive portions of the second differential signal pair being offset backward relative to the first conductive portion of the first ground terminal.

[0007] Furthermore, a first distance is defined as the distance by which the plurality of first contacts of the first differential signal pair are offset forward relative to the first contact of the first ground terminal, and a second distance is defined as the distance by which the plurality of first conductive parts of the first differential signal pair are offset forward relative to the first conductive part of the first ground terminal, wherein the first distance is equal to the second distance; a third distance is defined as the distance by which the plurality of first contacts of the second differential signal pair are offset backward relative to the first contact of the first ground terminal, and a fourth distance is defined as the distance by which the plurality of first conductive parts of the second differential signal pair are offset backward relative to the first conductive part of the first ground terminal, wherein the third distance is equal to the fourth distance, and the first distance is equal to the third distance.

[0008] Furthermore, in the left-right direction, the distance between the first contact portion of the grounding terminal unit and the first contact portion of the first differential signal pair is equal to the distance between the first contact portion of the grounding terminal unit and the first contact portion of the second differential signal pair, and the distance between the first conductive portion of the grounding terminal unit and the first conductive portion of the first differential signal pair is equal to the distance between the first conductive portion of the grounding terminal unit and the first conductive portion of the second differential signal pair.

[0009] Furthermore, viewed from the left-right direction, the first connection portion of the first grounding terminal is at least partially located between the first connection portion of the first differential signal pair and the first connection portion of the second differential signal pair in the vertical direction, and the first connection portion of the first grounding terminal is at least partially located between the first connection portion of the first differential signal pair and the first connection portion of the second differential signal pair in the front-back direction.

[0010] Furthermore, the first conductive terminal on the left side of the first differential signal pair has the same structure as the first conductive terminal on the left side of the second differential signal pair, and the first conductive terminal on the right side of the first differential signal pair has the same structure as the first conductive terminal on the right side of the second differential signal pair.

[0011] Furthermore, the length of the conduction path between the first contact portion and the first conductive portion of the first differential signal pair is the same as the length of the conduction path between the first contact portion and the first conductive portion of the second differential signal pair.

[0012] Furthermore, the plurality of first conductive terminals include a plurality of first differential signal pairs, a plurality of second differential signal pairs, and a plurality of grounding terminal units. The plurality of first differential signal pairs and the plurality of second differential signal pairs are arranged alternately in the left-right direction. Each first differential signal pair has a grounding terminal unit on its left and right sides, and each second differential signal pair has a grounding terminal unit on its left and right sides. The plurality of first contacts of the plurality of first differential signal pairs are aligned in the left-right direction, the plurality of first contacts of the plurality of second differential signal pairs are aligned in the left-right direction, and the plurality of first contacts of the plurality of grounding units are aligned in the left-right direction. The plurality of first conductive portions of the plurality of first differential signal pairs are aligned in the left-right direction, the plurality of first conductive portions of the plurality of second differential signal pairs are aligned in the left-right direction, and the plurality of first conductive portions of the plurality of grounding units are aligned in the left-right direction.

[0013] Furthermore, when viewed from the left and right, the bending shapes of the first differential signal pair, the second differential signal pair, and the first grounding terminal are consistent.

[0014] Furthermore, the maximum width of the first connection portion of the first grounding terminal in the left-right direction is greater than the maximum width of the first connection portion in the left-right direction of each of the first differential signal pairs and the maximum width of the first connection portion in the left-right direction of each of the second differential signal pairs.

[0015] Furthermore, each of the first connecting portions includes a first extension portion and a second extension portion connected to each other. The first extension portion is connected to the first contact portion and extends rearward relative to the first contact portion. The second extension portion is connected to the first conductive portion and extends downward from the rear end of the first extension portion. The maximum width of the first connecting portion of the first grounding terminal in the left-right direction is located in the second extension portion.

[0016] Furthermore, it includes a second insulator and a plurality of second conductive terminals arranged in the second insulator in a left-right direction. Each second conductive terminal includes a second contact portion, a second conductive portion, and a second connecting portion connecting the second contact portion and the second conductive portion. The second contact portion is located in front of the second conductive portion, the plurality of first contact portions are located above the plurality of second contact portions, the plurality of first conductive portions are located behind the plurality of second conductive portions, and the terminal length of the first conductive terminal is greater than the terminal length of the second conductive terminal.

[0017] The present invention also provides an electrical connector, comprising: a first insulator; a plurality of first conductive terminals arranged in a left-right direction and disposed on the first insulator, each first conductive terminal having a first contact portion, a first conductive portion, and a first connecting portion connecting the first contact portion and the first conductive portion, the first contact portion being located in front of the first conductive portion; the plurality of first conductive terminals including a first differential signal pair and a second differential signal pair, and a ground terminal unit located between the first differential signal pair and the second differential signal pair, the ground terminal unit being disposed adjacent to the first differential signal pair and the second differential signal pair respectively, the ground terminal unit including at least one first ground terminal; the first contact portion of the first differential signal pair and the first contact portion of the second differential signal pair are arranged in a left-right direction. The first contact portion of the first grounding terminal is spaced apart in the rear direction. Viewed from the top and bottom, the first contact portion of the first grounding terminal is located between the first contact portion of the first differential signal pair and the first contact portion of the second differential signal pair in the front-to-back direction. The first conductive portions of the first differential signal pair and the first conductive portions of the second differential signal pair are spaced apart in the front-to-back direction. Viewed from the top and bottom, the first conductive portion of the first grounding terminal is located between the first conductive portions of the first differential signal pair and the first conductive portions of the second differential signal pair in the front-to-back direction. The length of the conduction path between each first contact portion of the first differential signal pair and the corresponding first conductive portion is equal to the length of the conduction path between each first contact portion of the second differential signal pair and the corresponding first conductive portion.

[0018] Furthermore, each of the first connection portions includes a first extension portion and a second extension portion connected to each other. The first extension portion is connected to the first contact portion and extends rearward relative to the first contact portion. The second extension portion is connected to the first conductive portion and extends downward from the rear end of the first extension portion. The first extension portion of the first ground terminal is at least partially located between the first extension portion of the first differential signal pair and the first extension portion of the second differential signal pair in the vertical direction. The second extension portion of the first ground terminal is at least partially located between the second extension portion of the first differential signal pair and the second extension portion of the second differential signal pair in the front-back direction.

[0019] The present invention also provides a connector assembly, comprising: a circuit board having a plurality of first contact pads on one of its upper and lower surfaces; an electronic card having a plurality of first fingers on one of its upper and lower surfaces; and an electrical connector mounted on the circuit board, the electrical connector comprising a base and a plurality of first conductive terminals disposed on the base; the base having a mating surface and a recessed insertion cavity extending rearward from the mating surface for insertion of the electronic card; each first conductive terminal having a first contact portion, a first conductive portion, and a first connecting portion connecting the first contact portion and the first conductive portion, the first contact portion being located in front of the first conductive portion, the first contact portion being... A portion is exposed in the insertion cavity for contacting the first guide, and a first conductive portion is exposed in the base for contacting the first contact pad. The first connecting portion is fixed to the base. A plurality of first conductive terminals include a first differential signal pair and a second differential signal pair, and a ground terminal unit located between the first differential signal pair and the second differential signal pair. The ground terminal unit is respectively disposed adjacent to the first differential signal pair and the second differential signal pair, and the ground terminal unit includes at least one first ground terminal. A plurality of first contact portions of the first differential signal pair are offset forward by a first distance relative to the first contact portion of the first ground terminal. The plurality of first conductive portions of the second differential signal pair are offset forward by a second distance relative to the first conductive portion of the first ground terminal; the plurality of first contact portions of the second differential signal pair are offset backward by a third distance relative to the first contact portion of the first ground terminal; and the plurality of first conductive portions of the second differential signal pair are offset backward by a fourth distance relative to the first conductive portion of the first ground terminal. The first distance is equal to the second distance, and the third distance is equal to the fourth distance. A pair of first contact pads conductive to the first differential signal pair is defined as the first pair of differential pads, and another pair of first contact pads conductive to the second differential signal pair is defined as the second pair of differential pads. The plurality of first contact pads conductive to the first ground terminal are... The first contact pad is defined as the first grounding pad; a pair of first fingers connected to the first differential signal pair is defined as the first pair of differential fingers, another pair of first fingers connected to the second differential signal pair is defined as the second pair of differential fingers, and the first finger connected to the first grounding terminal is defined as the first grounding finger; the first pair of differential fingers is offset forward by a fifth distance relative to the first grounding finger, the first pair of differential pads is offset forward by a sixth distance relative to the first grounding pad, the second pair of differential fingers is offset backward by a seventh distance relative to the first grounding finger, and the second pair of differential pads is offset backward by an eighth distance relative to the first grounding pad, wherein the fifth distance is equal to the sixth distance, and the seventh distance is equal to the eighth distance.

[0020] Furthermore, the first distance is equal to the third distance, and the fifth distance is equal to the seventh distance.

[0021] Furthermore, viewed from the left-right direction, the first connection portion of the first grounding terminal is at least partially located between the first connection portion of the first differential signal pair and the first connection portion of the second differential signal pair in the vertical direction, and the first connection portion of the first grounding terminal is at least partially located between the first connection portion of the first differential signal pair and the first connection portion of the second differential signal pair in the front-back direction.

[0022] Furthermore, the length of the conduction path between the first contact portion and the first conductive portion of the first differential signal pair is the same as the length of the conduction path between the first contact portion and the first conductive portion of the second differential signal pair.

[0023] Furthermore, the first conductive terminal on the left side of the first differential signal pair has the same structure as the first conductive terminal on the left side of the second differential signal pair, and the first conductive terminal on the right side of the first differential signal pair has the same structure as the first conductive terminal on the right side of the second differential signal pair.

[0024] Furthermore, the base includes a plurality of second conductive terminals arranged in a left-right direction. The base includes an insulating body, a first insulator, and a second insulator. The insulating body is provided with the insertion cavity. The first connection portion of the plurality of first conductive terminals is disposed on the first insulator, and the plurality of second conductive terminals are disposed on the second insulator. The first insulator and the second insulator are mounted on the insulating body.

[0025] Furthermore, multiple first contact portions are located above multiple second contact portions, multiple first conductive portions are located behind multiple second conductive portions, the first contact portions and the second contact portions are located on the upper and lower sides of the insertion cavity, and the terminal length of the first conductive terminal is greater than the terminal length of the second conductive terminal.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] Crosstalk is generated by the coupling between two adjacent differential signal pairs through mutual capacitance and mutual inductance, and is directly proportional to these values. The distance between two adjacent differential signal pairs is inversely proportional to both mutual capacitance and mutual inductance. The magnetic force between adjacent differential signal pairs represents the magnitude of crosstalk. The essence of crosstalk is the energy of this interaction, determined by mutual capacitance and mutual inductance. By changing the positions of the contact and conduction portions of adjacent differential signal pairs—that is, by shifting the first contact portion of the first differential signal pair forward relative to the first contact portion of the second differential signal pair, and also shifting the first conduction portion of the first differential signal pair forward relative to the first conduction portion of the second differential signal pair—the distance between the first and second differential signal pairs is increased. The distance between signal pairs reduces crosstalk between adjacent differential signal pairs, thereby improving high-frequency characteristics; and at least one first ground terminal located between adjacent differential signal pairs is adjusted so that it is also located between adjacent differential signal pairs in the front-back direction. That is, in the front-back direction, by placing the first contact portion of the first ground terminal between the two first contact portions of adjacent differential signal pairs, and the first conductive portion of the first ground terminal also between adjacent differential signal pairs, it is avoided that the first contact portion and the first conductive portion of the first ground terminal are offset to the same side in the front-back direction relative to the first contact portion and the first conductive portion of the adjacent differential signal pairs, which would cause a large difference in the impact on adjacent differential signal pairs. Attached Figure Description

[0028] Figure 1 This is an exploded perspective view of the connector assembly of the present invention;

[0029] Figure 2 for Figure 1 An exploded perspective view of the electrical connector of the present invention;

[0030] Figure 3 for Figure 1 A cross-sectional view of the connector after it has been installed on the circuit board, taken along a plane that is parallel to the plane defined by the front-to-back direction and the up-down direction.

[0031] Figure 4 for Figure 2 A schematic diagram of the first conductive terminal;

[0032] Figure 5 for Figure 1 The diagram shows only a portion of the first conductive terminal when it is connected to the electronic card and circuit board.

[0033] Figure 6 for Figure 5The image shows only a side view of the first differential signal pair, the second differential signal pair, and a first ground terminal located between them;

[0034] Figure 7 for Figure 1 The diagram shows only a portion of the second conductive terminal when it is connected to the electronic card and circuit board.

[0035] Figure 8 for Figure 7 A schematic diagram showing the hidden circuit board from another perspective;

[0036] Figure 9 for Figure 7 Only the side view of the second conductive terminal is shown in the image;

[0037] Figure 10 for Figure 1 The image shows only a top view of the top surface of the electronic card;

[0038] Figure 11 for Figure 1 The diagram only shows the lower surface of the electronic card;

[0039] Figure 12 for Figure 1 The image shows only a top view of the top surface of the circuit board.

[0040] Explanation of reference numerals in the accompanying drawings for the specific implementation methods:

[0041] Electrical connector 100 Metal casing 1 Base body 2 Insulating body 2a First insulator 2b Second insulator 2c docking surface 21 Insertion cavity 22 First surface 23 Second surface 24 First conductive terminal 3 First contact section 31 First guide section 32 First connecting part 33 First extension 331 Second extension 332 The first differential signal pair S1 The second differential signal pair S2 First grounding terminal G1 Second conductive terminal 4 Second contact part 41 Second guide section 42 Second connecting part 43 The third differential signal pair S3 Fourth differential signal pair S4 Second grounding terminal G2 Electronic card 200 First finger 7a The first pair of difference indices 71 The second pair of difference indices 72 First grounding finger 73 Second finger 7b The third pair of difference indices 74 The fourth pair of difference indices 75 Second grounding finger 76 Circuit board 300 First contact pad 8a First pair of differential pads 81 Second pair of differential pads 82 First grounding pad 83 Second contact pad 8b The third pair of differential pads 84 Fourth pair of differential pads 85 First grounding pad 86 First distance L1 Second distance L2 Third distance L3 Fourth distance L4 Fifth distance L5 Sixth distance L6 Seventh distance L7 Eighth distance L8 First path M The first pair of paths M1 The second pair of paths M2 Second path N The third pair of paths N1 The fourth pair of paths N2 Detailed Implementation

[0042] To facilitate a better understanding of the purpose, structure, and features of this invention, the invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0043] For ease of understanding, this invention defines a left-right direction (X-axis), a front-back direction (Y-axis), and a top-bottom direction (Z-axis), and these three directions are perpendicular to each other.

[0044] The connector assembly of the present invention includes an electrical connector 100, an electronic card 200 mating with the electrical connector 100, and a circuit board 300, wherein the electrical connector 100 is mounted downward on the circuit board 300.

[0045] like Figures 1 to 9 The image shows a specific embodiment of the electrical connector 100 in the connector assembly of the present invention; Figures 10 to 11 The electronic card 200 is used in conjunction with the electrical connector 100; Figure 12 The circuit board 300 is used to mate with the electrical connector 100.

[0046] like Figure 1 , Figure 2 and Figure 3 As shown, the electrical connector 100 includes a metal housing 1 and a body 2 housed in the metal housing 1. The metal housing 1 is a frame structure with at least three sides, i.e., the cross-section is at least U-shaped. The body 2 is made of insulating material and has a mating surface 21 and a insertion cavity 22 recessed from the mating surface 21. The insertion cavity 22 extends forward through the body 2 and is used for the insertion of the electronic card 200.

[0047] like Figure 2 and Figure 3 As shown, the base 2 includes an insulating body 2a, a first insulator 2b and a second insulator 2c, and the insertion cavity 22 is disposed in the insulating body 2a and extends forward through the front end face of the insulating body 2a. The electrical connector 100 further includes a plurality of first conductive terminals 3 disposed in the first insulator 2b along the left-right direction and a plurality of second conductive terminals 4 disposed in the second insulator 2c along the left-right direction. The first insulator 2b has a plurality of first surfaces 23 and a plurality of second surfaces 24 on its front end face. The first surface 23 is offset to one side relative to the second surface 24 in the front-back direction. The first surface 23 is located in front of the second surface 24 in the front-back direction. The plurality of first conductive terminals 3 and the plurality of second conductive terminals 4 are exposed on the insulating body 2a and soldered to the circuit board 300. The plurality of first conductive terminals 3 are arranged in the left-right direction and embedded in the first insulator 2b. The plurality of second conductive terminals 4 are arranged in the left-right direction and embedded in the second insulator 2c. The second insulator 2c carrying the second conductive terminals 4 and the first insulator 2b carrying the first conductive terminals 3 are mounted together on the insulating body 2a.

[0048] like Figure 3 and Figure 4 As shown, each of the first conductive terminals 3 has a first contact portion 31, a first conductive portion 32, and a first connecting portion 33 connecting the first contact portion 31 and the first conductive portion 32. The first contact portion 31 is located in front of the first conductive portion 32. The first conductive portion 32 is formed by bending backward from one end of the first connecting portion 33, and exposes the insulating body 2a and is soldered to the circuit board 300.

[0049] like Figure 5As shown, each of the first connection portions 33 of the plurality of first conductive terminals 3 includes a first extension portion 331 and a second extension portion 332 connected to each other. The first extension portion 331 is connected to the first contact portion 31 and extends rearward relative to the first contact portion 31. The second extension portion 332 is connected to the first conductive portion 32 and is formed by bending downward from the rear end of the first extension portion 331.

[0050] like Figure 2 and Figure 5 As shown, the plurality of first conductive terminals 3 include a first differential signal pair S1 and a second differential signal pair S2, and a ground terminal unit located between the first differential signal pair S1 and the second differential signal pair S2. The ground terminal unit is disposed adjacent to the first differential signal pair S1 and the second differential signal pair S2, and the ground terminal unit includes only one first ground terminal G1. In other embodiments, the ground terminal unit may be provided with multiple first ground terminals G1 as needed.

[0051] like Figure 5 As shown, the maximum width of the first connection portion 33 of the first grounding terminal G1 in the left-right direction is greater than the maximum width of the first connection portion 33 in the left-right direction of each of the first differential signal pairs S1 and the maximum width of the first connection portion 33 in the left-right direction of each of the second differential signal pairs S2. That is, the width of the second extension portion 332 of the first grounding terminal G1 in the left-right direction is greater than the maximum width of the first connection portion 33 in the left-right direction of each of the first differential signal pairs S1 and the maximum width of the first connection portion 33 in the left-right direction of each of the second differential signal pairs S2. In other words, the maximum width of the first connection portion 33 of the first grounding terminal G1 in the left-right direction is located in the second extension portion 332.

[0052] like Figure 2 and Figure 4As shown, the plurality of first conductive terminals 3 include a plurality of first differential signal pairs S1, a plurality of second differential signal pairs S2, and a plurality of first ground terminals G1. The plurality of first differential signal pairs S1 are aligned in the left-right direction, the plurality of second differential signal pairs S2 are aligned in the left-right direction, and the plurality of ground terminal units are aligned in the left-right direction. That is, the plurality of first contact portions 31, the plurality of first conductive portions 32, and the plurality of first connection portions 33 of the plurality of first differential signal pairs S1 are all aligned in the left-right direction; the plurality of first contact portions 31, the plurality of first conductive portions 32, and the plurality of first connection portions 33 of the plurality of second differential signal pairs S2 are all aligned in the left-right direction; and the plurality of first contact portions 31, the plurality of first conductive portions 32, and the plurality of first connection portions 33 of the plurality of first ground terminals G1 are all aligned in the left-right direction.

[0053] like Figure 2 and Figure 4 As shown, multiple first differential signal pairs S1 and multiple second differential signal pairs S2 are arranged alternately in the left-right direction. Multiple first connecting portions 33 of the first differential signal pairs S1 protrude forward from the first surface 23, and multiple first connecting portions 33 of the second differential signal pairs S2 protrude forward from the second surface 24.

[0054] like Figure 5 and Figure 6 As shown, the first contact portion 31 of the first differential signal pair S1 and the first contact portion 31 of the second differential signal pair S2 are spaced apart in the front-to-back direction. Viewed from above, the first contact portion 31 of the first ground terminal G1 is located between the first contact portion 31 of the first differential signal pair S1 and the first contact portion 31 of the second differential signal pair S2 in the front-to-back direction. The first conductive portion 32 of the first differential signal pair S1 and the first conductive portion 32 of the second differential signal pair S2 are spaced apart in the front-to-back direction. Viewed from above, the first conductive portion 32 of the first ground terminal G1 is located between the first conductive portion 32 of the first differential signal pair S1 and the first conductive portion 32 of the second differential signal pair S2 in the front-to-back direction. The length of the conduction path between each first contact portion 31 of the first differential signal pair S1 and its corresponding first conductive portion 32 is equal to the length of the conduction path between each first contact portion 31 of the second differential signal pair S2 and its corresponding first conductive portion 32.

[0055] like Figure 5 and Figure 6 As shown, in this embodiment, the first contact portion 31 of the first differential signal pair S1 is offset forward by a first distance L1 relative to the first contact portion 31 of the first ground terminal G1, and the first conductive portion 32 of the first differential signal pair S1 is offset forward by a second distance L2 relative to the first conductive portion 32 of the first ground terminal G1, the first distance L1 being equal to the second distance L2; the first contact portion 31 of the second differential signal pair S2 is offset backward by a third distance L3 relative to the first contact portion 31 of the first ground terminal G1, and the first conductive portion 32 of the second differential signal pair S2 is offset backward by a fourth distance L4 relative to the first conductive portion 32 of the first ground terminal G1, the third distance L3 being equal to the fourth distance L4, and the first distance L1 being equal to the third distance L3; the two first conductive terminals 3 in the first differential signal pair S1 are symmetrically arranged left and right, and the two first conductive terminals 3 in the second differential signal pair S2 are symmetrically arranged left and right. In other embodiments, under the condition that the length of the conduction path between each first contact portion 31 of the first differential signal pair S1 and the corresponding first conductive portion 32 is equal to the length of the conduction path between each first contact portion 31 of the second differential signal pair S2 and the corresponding first conductive portion 32, the offset directions of the first contact portion 31 of the first differential signal pair S1 and the first contact portion 31 of the second differential signal pair S2 relative to the first contact portion 31 of the first ground terminal G1 in the front-back direction can be interchanged, as long as the offset directions are opposite. The offset directions of the first conductive portion 32 of the first differential signal pair S1 and the first conductive portion 32 of the second differential signal pair S2 relative to the first conductive portion 32 of the first ground terminal G1 in the front-back direction can also be interchanged, as long as the offset directions are opposite.

[0056] like Figure 2 and Figure 6 As shown, the distance by which the first contact portion 31 of the first differential signal pair S1 and the first contact portion 31 of the second differential signal pair S2 are offset in the front-back direction is the same as the distance by which the first surface 23 is offset relative to the second surface 24 in the front-back direction. This makes the positions and areas of the plurality of first connection portions 33 of the first differential signal pair S1 and the plurality of first connection portions 33 of the second differential signal pair S2 exposed to air approximately the same. This ensures that the area of ​​the plurality of first terminals 3 of the first differential signal pair S1 covered by plastic is approximately the same as the area of ​​the plurality of first terminals 3 of the second differential signal pair S2 covered by plastic, thus ensuring the stability of signal transmission between the two terminal differential signal pairs.

[0057] like Figure 4 and Figure 5 As shown, the first conductive terminals 3 at the same positions in the first differential signal pair S1 and the second differential signal pair S2 have the same structure in the left-right direction. That is, the first conductive terminal 3 on the left side of the first differential signal pair S1 has the same structure as the first conductive terminal 3 on the left side of the second differential signal pair S2, and the first conductive terminal 3 on the right side of the first differential signal pair S1 has the same structure as the first conductive terminal 3 on the right side of the second differential signal pair S2. In this embodiment, the two first conductive terminals 3 in the first differential signal pair S1 have different structures, and the two first conductive terminals 3 in the second differential signal pair S2 have different structures, forming differential coupling. In other embodiments, the two first conductive terminals 3 in the first differential signal pair S1 have the same structure, and the two first conductive terminals 3 in the second differential signal pair S2 have the same structure.

[0058] like Figure 5 As shown, in the left-right direction, the distance between the first contact portion 31 of the first grounding terminal G1 and the first contact portion 31 of the first differential signal pair S1 is equal to the distance between the first contact portion 31 of the first grounding terminal G1 and the first contact portion 31 of the second differential signal pair S2, and the distance between the first conductive portion 32 of the first grounding terminal G1 and the first conductive portion 32 of the first differential signal pair S1 is equal to the distance between the first conductive portion 32 of the first grounding terminal G1 and the first conductive portion 32 of the second differential signal pair S2. Along the front-to-back direction, after the first differential signal pair S1 and the second differential signal pair S2 are staggered front-to-back, the first ground terminal G1 is placed between the first differential signal pair S1 and the second differential signal pair S2, ensuring that the distance between the first ground terminal G1 and the first differential signal pair S1 and the second differential signal pair S2 is consistent, and that the distance between the first ground terminal G1 and the distance between the first differential signal pair S1 and the second differential signal pair S2 in the left-to-right direction is consistent, so as to reduce the grounding coupling value, thereby slowing down resonance and improving crosstalk characteristics.

[0059] like Figure 5 and Figure 6As shown, the bending shapes of the first differential signal pair S1, the second differential signal pair S2, and the first grounding terminal G1 are consistent, which allows the first grounding terminal G1 to have a more balanced influence on the first differential signal pair S1 and the second differential signal pair S2. The maximum width of the first connecting portion 33 of the first grounding terminal G1 in the left-right direction is greater than the maximum width of the first connecting portion 33 in the left-right direction of each of the first differential signal pairs S1 and the second differential signal pairs S2, respectively. This allows the first grounding terminal G1 to increase the shielding area of ​​each of the first differential signal pairs S1 and the second differential signal pairs S2.

[0060] like Figure 5 and Figure 6 As shown, viewed from the left-right direction, the first connection portion 33 of the first ground terminal G1 is at least partially located between the first connection portion 33 of the first differential signal pair S1 and the first connection portion 33 of the second differential signal pair S2 in the vertical direction, and at least partially located between the first connection portion 33 of the first differential signal pair S1 and the first connection portion 33 of the second differential signal pair S2 in the front-back direction. In this embodiment, the first extension portion 331 of the first ground terminal G1 is located at the middle position between the first extension portion 331 of the first differential signal pair S1 and the first extension portion 331 of the second differential signal pair S2 in the vertical direction, and the second extension portion 332 of the first ground terminal G1 is located at the middle position between the second extension portion 332 of the first differential signal pair S1 and the second extension portion 332 of the second differential signal pair S2 in the front-back direction, so that it can keep the distance with the two adjacent pairs of differential signal terminals consistent, thereby reducing the grounding coupling value and slowing down resonance, thereby improving crosstalk characteristics.

[0061] like Figure 5 and Figure 6As shown, in this embodiment, specifically, the first connection portion 33 of the first differential signal pair S1, near the corresponding first contact portion 31, is located above the portion of the first connection portion 33 of the second differential signal pair S2 near the corresponding first contact portion 31. The first connection portion 33 of the first ground terminal G1, near the first contact portion 31, is located vertically between the first connection portion 33 of the first differential signal pair S1 and the first connection portion 33 of the second differential signal pair S2. The portion of the first conductive part 32 is located in front of the portion of the first connection part 33 of the second differential signal pair S2 that is close to the corresponding portion of the first conductive part 32. The portion of the first connection part 33 of the first ground terminal G1 is located between the first connection part 33 of the first differential signal pair S1 and the first connection part 33 of the second differential signal pair S2 in the front-back direction. Thus, when viewed in the left-right direction, the first connection parts 33 of the first differential signal pair S1, the second differential signal pair S2 and the first ground terminal G1 form an intersection point.

[0062] like Figure 2 and Figure 3 As shown, each of the second conductive terminals 4 has a second contact portion 41, a second conductive portion 42, and a second connecting portion 43 connecting the second contact portion 41 and the second conductive portion 42. The second contact portion 41 is located in front of the second conductive portion 42. The second conductive portion 42 is formed by bending forward from one end of the second connecting portion 43, and exposes the insulating body 2a and is soldered to the circuit board 300.

[0063] like Figure 2 and Figure 8 As shown, the plurality of second conductive terminals 4 include a plurality of differential signal pairs and a plurality of second ground terminals G2. One of the two differential signal pairs arranged in a left-right direction and adjacent to each other is defined as a third differential signal pair S3 and the other as a fourth differential signal pair S4. The plurality of second conductive terminals 4 include a plurality of third differential signal pairs S3 and a plurality of fourth differential signal pairs S4. The plurality of third differential signal pairs S3 and the plurality of fourth differential signal pairs S4 are arranged alternately in a left-right direction. Each third differential signal pair S3 has a second ground terminal G2 arranged adjacent to it on both its left and right sides.

[0064] like Figure 7 , Figure 8 and Figure 9As shown, the second conductive terminal 4 on the left side of the third differential signal pair S3 has a different structure than the second conductive terminal 4 on the left side of the fourth differential signal pair S4, and the second conductive terminal 4 on the right side of the third differential signal pair S3 also has a different structure than the second conductive terminal 4 on the right side of the fourth differential signal pair S4.

[0065] like Figure 7 and Figure 8 As shown, multiple second conductive portions 42 are aligned in the left-right direction, and multiple third differential signal pairs S3 and multiple second contact portions 41 of multiple second ground terminals G2 are aligned in the left-right direction.

[0066] like Figure 8 and Figure 9 As shown, the second contact portion 41 of the third differential signal pair S3 is offset to one side in the front-back direction relative to the second contact portion 41 of the fourth differential signal pair S4. In this embodiment, the second contact portion 41 of the third differential signal pair S3 is positioned further forward in the front-back direction relative to the second contact portion 41 of the fourth differential signal pair S4. The second connection portion 43 of the third differential signal pair S3 and the second connection portion 43 of the fourth differential signal pair S4 are partially offset in the vertical direction. When viewed in the left-right direction, the second connection portion 43 of the third differential signal pair S3 and the second connection portion 43 of the fourth differential signal pair S4 form an intersection.

[0067] like Figure 2 and Figure 3 As shown, the terminal length of the first conductive terminal 3 is greater than the terminal length of the second conductive terminal 4. The first conductive terminal 3 is located above the second conductive terminal 4. The first contact portion 31 is located above the second contact portion 41. The first conductive portion 32 is located behind the second conductive portion 42. The first contact portion 31 is exposed downward in the insertion cavity 22, and the second contact portion 41 is exposed upward in the insertion cavity 22. That is, the first contact portion 31 and the second contact portion 41 are located on the upper and lower sides of the insertion cavity 22. The first conductive portion 32 and the second conductive portion 42 are both soldered to the circuit board 300 by surface mount technology.

[0068] like Figure 7 , Figure 8 , Figure 10 and Figure 11As shown, the electronic card 200 includes a plurality of first fingers 7a and a plurality of second fingers 7b. The plurality of first fingers 7a are arranged in a left-right direction on the upper surface of the electronic card 200, and are used to conduct one-to-one with the plurality of first contact portions 31 of the plurality of first conductive terminals 3. The plurality of second fingers 7b are arranged in a left-right direction on the lower surface of the electronic card 200, and are used to conduct one-to-one with the plurality of second contact portions 41 of the plurality of second conductive terminals 4.

[0069] like Figure 5 , Figure 8 , Figure 10 and Figure 11 As shown, on the upper surface of the electronic card 200, a pair of first fingers 7a connected to the first differential signal pair S1 is defined as the first pair of differential fingers 71, another pair of first fingers 7a connected to the second differential signal pair S2 is defined as the second pair of differential fingers 72, and the first finger 7a connected to the first ground terminal G1 is defined as the first ground finger 73; on the lower surface of the electronic card 200, a pair of second fingers 7b connected to the third differential signal pair S3 is defined as the third pair of differential fingers 74, another pair of second fingers 7b connected to the fourth differential signal pair S4 is defined as the fourth pair of differential fingers 75, and the second finger connected to the second ground terminal G2 is defined as the second ground finger 76.

[0070] like Figure 5 , Figure 8 , Figure 10 and Figure 11 As shown, the electronic card 200 also has a plurality of first paths M, each first path M being connected to the guide point of a corresponding first finger 7a and the first contact portion 31. The two first paths M connected to the first pair of differential fingers 71 are defined as the first pair of paths M1, and the other two first paths M connected to the second pair of differential fingers 72 are defined as the second pair of paths M2.

[0071] like Figure 5 , Figure 7 and Figure 12As shown, the circuit board 300 includes a plurality of first contact pads 8a and a plurality of second contact pads 8b. The plurality of first contact pads 8a are arranged at intervals along the left-right direction on the upper surface of the circuit board 300. The plurality of first contact pads 8a are used to conduct one-to-one with the plurality of first conductive portions 32 of the plurality of first conductive terminals 3. The first conductive portions 32 and the first contact pads 8a are connected by soldering. The plurality of second contact pads 8b are arranged at intervals along the left-right direction on the same surface of the circuit board 300 (i.e., the upper surface of the circuit board 300). The plurality of second contact pads 8b are used to conduct one-to-one with the plurality of second conductive portions 42 of the plurality of second conductive terminals 4. The second conductive portions 42 and the second contact pads 8b are connected by soldering. The plurality of first contact pads 8a are spaced apart from the plurality of second contact pads 8b in the front-back direction, and the second contact pads 8b are located in front of the first contact pads 8a.

[0072] like Figure 5 , Figure 7 and Figure 12 As shown, on the upper surface of the circuit board 300, a pair of first contact pads 8a connected to the first differential signal pair S1 are defined as the first pair of differential pads 81, another pair of first contact pads 8a connected to the second differential signal pair S2 are defined as the second pair of differential pads 82, and the first contact pad 8a connected to the first ground terminal G1 is defined as the first ground pad 83; a pair of second contact pads 8b connected to the third differential signal pair S3 are defined as the third pair of differential pads 84, another pair of second contact pads 8b connected to the fourth differential signal pair S4 are defined as the fourth pair of differential pads 85, and the second contact pad 8b connected to the second ground terminal G2 is defined as the second ground pad 86.

[0073] like Figure 5 , Figure 10 and Figure 12 As shown, the first pair of differential fingers 71 are shifted forward by a fifth distance L5 relative to the first ground finger 73, and the first pair of differential pads 81 are shifted forward by a sixth distance L6 relative to the first ground pad 83, wherein the fifth distance L5 is equal to the sixth distance L6; the second pair of differential fingers 72 are shifted backward by a seventh distance L7 relative to the first ground finger 73, and the second pair of differential pads 82 are shifted backward by an eighth distance L8 relative to the first ground pad 83, wherein the seventh distance L7 is equal to the eighth distance L8; the fifth distance L5 is equal to the seventh distance L7, and the first distance L1 is equal to the fifth distance L5.

[0074] like Figure 5 , Figure 7 and Figure 12As shown, the circuit board 300 also has a plurality of second paths N, each second path N being connected to a corresponding first contact pad 8a and the first conductive part 32. The two second paths N connected to the first pair of differential pads 81 are defined as the third pair of paths N1, and the other two second paths N connected to the second pair of differential pads 82 are defined as the fourth pair of paths N2.

[0075] like Figure 6 , Figure 10 and Figure 12 As shown, the sum of the length of each first path M in the first pair of paths M1, the length of the conduction path between the first contact portion 31 and the first conductive portion 32 in each of the first differential signal pairs S1, and the length of each second path N in the third pair of paths N1 is equal to the sum of the length of each first path M in the second pair of paths M2, the length of the conduction path between the first contact portion 31 and the first conductive portion 32 in the second differential signal pairs S2, and the length of each second path N in the fourth pair of paths N2.

[0076] The electrical connector and connector assembly of the present invention also have the following beneficial effects:

[0077] 1. By shifting the first contact portion 31 of the first differential signal pair S1 forward relative to the first contact portion 31 of the second differential signal pair S2 in the front-back direction, and shifting the first conductive portion 32 of the first differential signal pair S1 forward relative to the first conductive portion 32 of the second differential signal pair S2 in the front-back direction, the distance between adjacent first differential signal pairs S1 and second differential signal pairs S2 is increased, crosstalk between adjacent first differential signal pairs S1 and second differential signal pairs S2 is reduced, thereby improving high-frequency crosstalk.

[0078] 2. By staggering the first differential signal pair S1 and the second differential signal pair S2, and placing the first grounding terminal G1 between adjacent first differential signal pairs S1 and second differential signal pairs S2, while ensuring that the distance between the first grounding terminal G1 and the first differential signal pairs S1 and S2 is consistent, and that the distance between the first grounding terminal G1 and the first differential signal pairs S1 and S2 in the left-right direction is consistent, the problem of crosstalk caused by the asymmetrical grounding coupling due to the inconsistent distance between the first grounding terminal G1 and the two adjacent differential signal pairs can be improved. This reduces the grounding coupling value, thereby mitigating resonance and improving crosstalk characteristics.

[0079] 3. By partially offsetting the first connection portion 33 of the first differential signal pair S1 and the first connection portion 33 of the second differential signal pair S2 in the vertical direction, and partially offsetting the first connection portion 33 of the first differential signal pair S1 and the first connection portion 33 of the second differential signal pair S2 in the front-back direction, the distance between the two first connection portions 33 in the first differential signal pair S1 and the second differential signal pair S2 is increased, thereby reducing the mutual interference between two adjacent differential signal pairs; furthermore, the first connection portion 33 of the first ground terminal G1 is partially located in the middle position between the first connection portion 33 of the first differential signal pair S1 and the first connection portion 33 of the second differential signal pair S2 in the vertical direction, and the first connection portion 33 of the first ground terminal G1 is partially located in the middle position between the first connection portion 33 of the first differential signal pair S1 and the first connection portion 33 of the second differential signal pair S2 in the front-back direction, so that it can be kept consistent with the distance between the two adjacent differential signal terminals, thereby reducing the ground coupling value and slowing down resonance, thereby improving the crosstalk characteristics.

[0080] 4. The length of the conduction path between the first contact portion 31 and the first conductive portion 32 of the first differential signal pair S1 is the same as the length of the conduction path between the first contact portion 31 and the first conductive portion 32 of the second differential signal pair S2, thereby reducing the delay difference between adjacent differential signal pairs.

[0081] 5. After the first differential signal pair S1 and the second differential signal pair S2 are staggered, the first pair of differential fingers 71 and the second pair of differential fingers 72, the first pair of differential pads 81 and the second pair of differential pads 82 are correspondingly displaced, so that the sum of the length of each first path M in the first pair of paths M1, the length of the conduction path between the first contact part 31 and the first conductive part 32 of each of the first differential signal pairs S1, and the length of each second path N in the third pair of paths N1 is equal to the sum of the length of each first path M in the second pair of paths M2, the length of the conduction path between the first contact part 31 and the first conductive part 32 of the second differential signal pair S2, and the length of each second path N in the fourth pair of paths N2, thereby reducing the delay difference between the first differential signal pair S1 and the second differential signal pair S2 and avoiding the Skew problem caused by excessive signal transmission path drop.

[0082] 6. The bending shapes of the first differential signal pair S1, the second differential signal pair S2, and the first grounding terminal G1 are consistent, so that the terminal shape of the first grounding terminal G1 can be adapted to the terminal shapes of the first differential signal pair S1 and the second differential signal pair S2 to absorb the electromagnetic radiation generated by the two adjacent differential signal pairs, thereby enhancing the shielding effect of the first grounding terminal G1 on the two adjacent differential signal pairs.

[0083] The above detailed description is only an illustration of a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. Therefore, all equivalent technical changes made using the content of this invention's specification and illustrations are included within the patent scope of this invention.

Claims

1. An electrical connector, characterized in that, include: The first insulator; Multiple first conductive terminals are arranged in a left-right direction and disposed on the first insulator. Each first conductive terminal has a first contact portion, a first conductive portion and a first connecting portion connecting the first contact portion and the first conductive portion. The first contact portion is located in front of the first conductive portion. The plurality of first conductive terminals include a first differential signal pair and a second differential signal pair, and a ground terminal unit located between the first differential signal pair and the second differential signal pair. The ground terminal unit is respectively disposed adjacent to the first differential signal pair and the second differential signal pair, and the ground terminal unit includes at least one first ground terminal. The plurality of first contacts of the first differential signal pair are offset forward relative to the first contact of the first ground terminal, and the plurality of first conductive portions of the first differential signal pair are offset forward relative to the first conductive portion of the first ground terminal. The plurality of first contacts of the second differential signal pair are offset backward relative to the first contact of the first ground terminal, and the plurality of first conductive portions of the second differential signal pair are offset backward relative to the first conductive portion of the first ground terminal. The distance by which the plurality of first contacts of the first differential signal pair are offset forward relative to the first contact of the first ground terminal is defined as a first distance, and the distance by which the plurality of first conductive portions of the first differential signal pair are offset forward relative to the first conductive portion of the first ground terminal is defined as a second distance, and the first distance is equal to the second distance. The plurality of first contacts of the second differential signal pair are offset backward by a third distance relative to the first contact of the first ground terminal, and the plurality of first conductive portions of the second differential signal pair are offset backward by a fourth distance relative to the first conductive portion of the first ground terminal, and the third distance is equal to the fourth distance, and the first distance is equal to the third distance.

2. The electrical connector according to claim 1, characterized in that: In the left-right direction, the distance between the first contact portion of the grounding terminal unit and the first contact portion of the first differential signal pair is equal to the distance between the first contact portion of the grounding terminal unit and the first contact portion of the second differential signal pair, and the distance between the first conductive portion of the grounding terminal unit and the first conductive portion of the first differential signal pair is equal to the distance between the first conductive portion of the grounding terminal unit and the first conductive portion of the second differential signal pair.

3. The electrical connector according to claim 1, characterized in that: Viewed from the left and right, the first connection portion of the first grounding terminal is at least partially located between the first connection portion of the first differential signal pair and the first connection portion of the second differential signal pair in the vertical direction, and the first connection portion of the first grounding terminal is at least partially located between the first connection portion of the first differential signal pair and the first connection portion of the second differential signal pair in the front and back direction.

4. The electrical connector according to claim 1, characterized in that: The first conductive terminal on the left side of the first differential signal pair has the same structure as the first conductive terminal on the left side of the second differential signal pair, and the first conductive terminal on the right side of the first differential signal pair has the same structure as the first conductive terminal on the right side of the second differential signal pair.

5. The electrical connector according to claim 1, characterized in that: The length of the conduction path between the first contact portion and the first conductive portion of the first differential signal pair is the same as the length of the conduction path between the first contact portion and the first conductive portion of the second differential signal pair.

6. The electrical connector according to claim 1, characterized in that: The plurality of first conductive terminals include a plurality of first differential signal pairs, a plurality of second differential signal pairs, and a plurality of grounding terminal units. The plurality of first differential signal pairs and the plurality of second differential signal pairs are arranged alternately in the left-right direction. Each first differential signal pair has a grounding terminal unit on its left and right sides, and each second differential signal pair has a grounding terminal unit on its left and right sides. The plurality of first contacts of the plurality of first differential signal pairs are aligned in the left-right direction, the plurality of first contacts of the plurality of second differential signal pairs are aligned in the left-right direction, and the plurality of first contacts of the plurality of grounding terminal units are aligned in the left-right direction. The plurality of first conductive portions of the plurality of first differential signal pairs are aligned in the left-right direction, the plurality of first conductive portions of the plurality of second differential signal pairs are aligned in the left-right direction, and the plurality of first conductive portions of the plurality of grounding terminal units are aligned in the left-right direction.

7. The electrical connector according to claim 1, characterized in that: Viewed from the left and right, the first differential signal pair, the second differential signal pair, and the first grounding terminal have the same bending shape.

8. The electrical connector according to claim 1, characterized in that: The maximum width of the first connection portion of the first grounding terminal in the left-right direction is greater than the maximum width of the first connection portion in the left-right direction of each of the first differential signal pairs and the maximum width of the first connection portion in the left-right direction of each of the second differential signal pairs.

9. The electrical connector according to claim 8, characterized in that: Each of the first connecting portions includes a first extension and a second extension connected to each other. The first extension is connected to the first contact portion and extends rearward relative to the first contact portion. The second extension is connected to the first conductive portion and extends downward from the rear end of the first extension portion. The maximum width of the first connecting portion of the first grounding terminal in the left-right direction is located in the second extension portion.

10. The electrical connector according to claim 1, characterized in that: The device further includes a second insulator and a plurality of second conductive terminals arranged in a left-right direction on the second insulator. Each second conductive terminal includes a second contact portion, a second conductive portion, and a second connecting portion connecting the second contact portion and the second conductive portion. The second contact portion is located in front of the second conductive portion, the plurality of first contact portions are located above the plurality of second contact portions, and the plurality of first conductive portions are located behind the plurality of second conductive portions. The terminal length of the first conductive terminal is greater than the terminal length of the second conductive terminal.

11. An electrical connector, characterized in that, include: The first insulator; Multiple first conductive terminals are arranged in a left-right direction and disposed on the first insulator. Each first conductive terminal has a first contact portion, a first conductive portion and a first connecting portion connecting the first contact portion and the first conductive portion. The first contact portion is located in front of the first conductive portion. The plurality of first conductive terminals include a first differential signal pair and a second differential signal pair, and a ground terminal unit located between the first differential signal pair and the second differential signal pair. The ground terminal unit is disposed adjacent to the first differential signal pair and the second differential signal pair, respectively, and the ground terminal unit includes at least one first ground terminal. The first contact portions of the first differential signal pair and the first contact portions of the second differential signal pair are spaced apart in the front-to-back direction. Viewed from the top-to-bottom direction, the first contact portion of the first ground terminal is located between the first contact portions of the first differential signal pair and the first contact portions of the second differential signal pair in the front-to-back direction. The first conductive portions of the first differential signal pair and the first conductive portions of the second differential signal pair are spaced apart in the front-to-back direction. Viewed from the top-to-bottom direction, the first conductive portion of the first ground terminal is located between the first conductive portions of the first differential signal pair and the second differential signal pair in the front-to-back direction. Between the first conductive portions; the length of the conduction path between each first contact portion of the first differential signal pair and the corresponding first conductive portion is equal to the length of the conduction path between each first contact portion of the second differential signal pair and the corresponding first conductive portion, each first connection portion includes a first extension portion and a second extension portion connected to each other, the first extension portion is connected to the first contact portion and extends rearward relative to the first contact portion, the second extension portion is connected to the first conductive portion, the second extension portion is bent downward from the rear end of the first extension portion, the first extension portion of the first ground terminal is at least partially located between the first extension portion of the first differential signal pair and the first extension portion of the second differential signal pair in the vertical direction, and the second extension portion of the first ground terminal is at least partially located between the second extension portion of the first differential signal pair and the second extension portion of the second differential signal pair in the front-back direction.

12. A connector assembly, characterized in that, include: A circuit board, wherein a plurality of first contact pads are provided on one of its upper and lower surfaces; An electronic card, wherein the electronic card has a plurality of first fingers on one of its upper and lower surfaces; An electrical connector is mounted on the circuit board, the electrical connector comprising a base and a plurality of first conductive terminals disposed on the base; The base has a mating surface and a recessed insertion cavity extending rearward from the mating surface for inserting the electronic card; Each of the first conductive terminals has a first contact portion, a first conductive portion, and a first connecting portion connecting the first contact portion and the first conductive portion. The first contact portion is located in front of the first conductive portion and is exposed in the insertion cavity for connecting with the first hand. The first conductive portion is exposed in the base body for connecting with the first contact pad. The first connecting portion is fixed to the base body. The plurality of first conductive terminals include a first differential signal pair and a second differential signal pair, and a ground terminal unit located between the first differential signal pair and the second differential signal pair. The ground terminal unit is respectively disposed adjacent to the first differential signal pair and the second differential signal pair, and the ground terminal unit includes at least one first ground terminal. The plurality of first contacts of the first differential signal pair are offset forward by a first distance relative to the first contact of the first ground terminal, the plurality of first conductive portions of the first differential signal pair are offset forward by a second distance relative to the first conductive portion of the first ground terminal, the plurality of first contacts of the second differential signal pair are offset backward by a third distance relative to the first contact of the first ground terminal, and the plurality of first conductive portions of the second differential signal pair are offset backward by a fourth distance relative to the first conductive portion of the first ground terminal, wherein the first distance is equal to the second distance, and the third distance is equal to the fourth distance; A pair of first contact pads connected to the first differential signal pair is defined as the first pair of differential pads, another pair of first contact pads connected to the second differential signal pair is defined as the second pair of differential pads, and the first contact pad connected to the first ground terminal is defined as the first ground pad; a pair of first fingers connected to the first differential signal pair is defined as the first pair of differential fingers, another pair of first fingers connected to the second differential signal pair is defined as the second pair of differential fingers, and the first finger connected to the first ground terminal is defined as the first ground finger; the first pair of differential fingers is offset forward by a fifth distance relative to the first ground finger, the first pair of differential pads is offset forward by a sixth distance relative to the first ground pad, the second pair of differential fingers is offset backward by a seventh distance relative to the first ground finger, and the second pair of differential pads is offset backward by an eighth distance relative to the first ground pad, wherein the fifth distance is equal to the sixth distance, and the seventh distance is equal to the eighth distance.

13. The connector assembly according to claim 12, characterized in that: The first distance is equal to the third distance, and the fifth distance is equal to the seventh distance.

14. The connector assembly according to claim 12, characterized in that: Viewed from the left and right, the first connection portion of the first grounding terminal is at least partially located between the first connection portion of the first differential signal pair and the first connection portion of the second differential signal pair in the vertical direction, and the first connection portion of the first grounding terminal is at least partially located between the first connection portion of the first differential signal pair and the first connection portion of the second differential signal pair in the front and back direction.

15. The connector assembly according to claim 12, characterized in that: The length of the conduction path between the first contact portion and the first conductive portion of the first differential signal pair is the same as the length of the conduction path between the first contact portion and the first conductive portion of the second differential signal pair.

16. The connector assembly according to claim 12, characterized in that: The first conductive terminal on the left side of the first differential signal pair has the same structure as the first conductive terminal on the left side of the second differential signal pair, and the first conductive terminal on the right side of the first differential signal pair has the same structure as the first conductive terminal on the right side of the second differential signal pair.

17. The connector assembly according to claim 12, characterized in that: The device further includes a plurality of second conductive terminals arranged in a left-right direction. The base includes an insulating body, a first insulator and a second insulator. The insulating body is provided with the insertion cavity. The first connection portion of the plurality of first conductive terminals is disposed on the first insulator. The plurality of second conductive terminals are disposed on the second insulator. The first insulator and the second insulator are mounted on the insulating body.

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