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 terminal group and a second terminal group arranged adjacently, the first terminal group comprising a first differential signal pair and two first ground terminals located on the left and right sides of the first differential signal pair, the second terminal group comprising a second differential signal pair and two second ground terminals located on the left and right sides of the second differential signal pair, the first contact part of the first terminal group being offset on one side in the front-back direction relative to the first contact part of the second terminal group, and the first lead-in part of the first terminal group being offset on the same side in the front-back direction relative to the first lead-in part of the second terminal group, the distance between the differential signal pair and the signal pair being enlarged, so that the crosstalk is reduced, and the effect of improving high frequency is achieved.

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 two grounding terminals in two adjacent terminal groups to shield the differential signal pairs within the corresponding terminal group, and by staggering the contact portions and conductive portions of two adjacent terminal groups, the distance between two adjacent differential signal pairs is increased, thereby reducing crosstalk between two adjacent differential signal pairs and improving the high-frequency effect.

[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 at least one first terminal group and at least one second terminal group, the at least one first terminal group and the at least one second terminal group being alternately arranged in a left-right direction, the first terminal group including a first differential signal pair and two first ground terminals located on the left and right sides of the first differential signal pair and disposed adjacent to the first differential signal pair, the second terminal group including a second differential signal pair and two second ground terminals located on the left and right sides of the second differential signal pair and disposed adjacent to the second differential signal pair; for the same first terminal group, the plurality of first contact portions are aligned in a left-right direction, the plurality of first connecting portions are aligned in a left-right direction, and the plurality of first conductive terminals are disposed in a right-right direction. A conductive portion is aligned in the left-right direction; for the same second terminal group, multiple first contacts are aligned in the left-right direction, multiple first connecting portions are aligned in the left-right direction, and multiple first conductive portions are aligned in the left-right direction; the first contact portion of the first terminal group is offset to one side in the front-back direction relative to the first contact portion of the second terminal group, and the first conductive portion of the first terminal group is offset to the same side in the front-back direction relative to the first conductive portion of the second terminal group. The distance between the first contact portion of the first terminal group and the first contact portion of the second terminal group offset in the front-back direction is defined as a first distance, and the distance between the first conductive portion of the first terminal group and the first conductive portion of the second terminal group offset in the front-back direction is defined as a second distance. The first distance is equal to the second distance, and 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.

[0007] 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.

[0008] Furthermore, viewed from the left-right direction, the first connecting portion of the first terminal group and the first connecting portion of the second terminal group are at least partially offset from each other in the vertical direction, and the first connecting portion of the first terminal group and the first connecting portion of the second terminal group are at least partially offset from each other in the front-back direction.

[0009] Furthermore, the system includes a second insulator and a plurality of second conductive terminals disposed on the first insulator. The plurality of second conductive terminals are arranged in a left-right direction. The first insulator is fixedly connected to 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 second conductive terminals include at least one third terminal group and at least one fourth terminal group. The at least one third terminal group and the at least one fourth terminal group are arranged alternately in a left-right direction. The third terminal group includes a third differential signal pair and two terminals located on the left and right sides of the third differential signal pair and adjacent to the third differential signal pair. The third grounding terminal, the fourth terminal group includes a fourth differential signal pair and two fourth grounding terminals located on the left and right sides of the fourth differential signal pair and adjacent to the fourth differential signal pair; for the same third terminal group, a plurality of second contacts are aligned in the left-right direction, a plurality of second connections are aligned in the left-right direction, and a plurality of second conductive parts are aligned in the left-right direction; for the same fourth terminal group, a plurality of second contacts are aligned in the left-right direction, a plurality of second connections are aligned in the left-right direction, and a plurality of second conductive parts are aligned in the left-right direction; the second contacts of the third terminal group are offset to one side in the front-back direction relative to the second contacts of the fourth terminal group.

[0010] Furthermore, the second conductive portion of the third terminal group and the second conductive portion of the fourth terminal group are aligned in the left-right direction, and when viewed in the left-right direction, the second connecting portion of the third terminal group and the second connecting portion of the fourth terminal group are at least partially offset in the up-down direction.

[0011] Furthermore, it includes a body and a metal shell covering the body. The body includes a insertion cavity that extends forward through the body. A first insulator and a second insulator are mounted on the body. The first contact portion and the second contact portion are located on the upper and lower sides of the insertion cavity and are respectively exposed in the insertion cavity.

[0012] 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 at least one first terminal group and at least one second terminal group, the at least one first terminal group and the at least one second terminal group being alternately arranged in a left-right direction, the first terminal group including a first differential signal pair and two first ground terminals located on the left and right sides of the first differential signal pair and disposed adjacent to the first differential signal pair, and the first differential signal pair... The first differential signal pair and the first grounding terminal are arranged side by side in the left-right direction. The second terminal group includes a second differential signal pair and two second grounding terminals located on the left and right sides of the second differential signal pair and adjacent to the second differential signal pair. The second differential signal pair and the second grounding terminal are arranged side by side in the left-right direction. The first contact portion of the first differential signal pair is offset to one side in the front-back direction relative to the first contact portion of the second differential signal pair. The first conductive portion of the first differential signal pair is offset to the same side in the front-back direction relative to the first conductive portion of the second differential signal pair. The first conductive terminals of the same position arranged sequentially in the left-right direction in the first terminal group and the second terminal group have the same structure.

[0013] Furthermore, viewed from the left-right direction, the first connection portion of the first differential signal pair in the first terminal group and the first connection portion of the second differential signal pair in the second terminal group are at least partially offset from each other in the vertical direction, and the first connection portion of the first differential signal pair in the first terminal group and the first connection portion of the second differential signal pair in the second terminal group are at least partially offset from each other in the front-back direction.

[0014] Furthermore, the plurality of first conductive terminals include a plurality of first terminal groups and a plurality of second terminal groups; for all the first terminal groups, a plurality of first contact portions are aligned in the left-right direction, a plurality of first connection portions are aligned in the left-right direction, and a plurality of first conductive portions are aligned in the left-right direction; for all the second terminal groups, a plurality of first contact portions are aligned in the left-right direction, a plurality of first connection portions are aligned in the left-right direction, and a plurality of first conductive portions are aligned in the left-right direction.

[0015] Furthermore, the first insulator has at least one first surface and at least one second surface on its front end face, the first surface being offset relative to the second surface on the same side in the front-rear direction, a plurality of first connecting portions of the first terminal group protruding forward from the first surface, and a plurality of first connecting portions of the second terminal group protruding forward from the second surface.

[0016] Furthermore, the distance by which the first contact portion of the first terminal group and the first contact portion of the second terminal group are offset in the front-back direction is the same as the distance by which the first surface is offset relative to the second surface in the front-back direction.

[0017] 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 body, a first insulator disposed on the body, and a plurality of first conductive terminals disposed on the first insulator; the body 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 connecting portion. The first contact portion and the first conductive portion are connected by a first connecting portion. The first contact portion is located in front of the first conductive portion and is exposed in the insertion cavity for contacting the first guide. The first conductive portion is exposed in the body for contacting the first contact pad. The first connecting portion is fixed to the first insulator. A plurality of first conductive terminals include at least one first terminal group and at least one second terminal group, with the at least one first terminal group and the at least one second terminal group arranged alternately in a left-right direction. The first terminal group includes a first differential signal pair and terminals located to the left and right of the first differential signal pair. The second terminal group includes two first ground terminals disposed on both sides and adjacent to the first differential signal pair. The second terminal group includes a second differential signal pair and two second ground terminals disposed on the left and right sides of the second differential signal pair and adjacent to it. For the same first terminal group, multiple first contacts are aligned in the left-right direction, multiple first connections are aligned in the left-right direction, and multiple first conductive parts are aligned in the left-right direction. For the same second terminal group, multiple first contacts are aligned in the left-right direction, multiple first connections are aligned in the left-right direction, and multiple first conductive parts are aligned in the left-right direction. The first contact of the first terminal group is offset by a first distance relative to the first contact of the second terminal group in the front-back direction on one side, and the first conductive part of the first terminal group is offset by a second distance relative to the first conductive part of the second terminal group on the same side in the front-back direction. The first distance is equal to the second distance. The length of the conduction path between the first contact and the first conductive part of the first differential signal pair is the same as the length of the conduction path between the first contact and the first conductive part of the second differential signal pair.A set of first contact pads connected to the first terminal group is defined as the first set of contact pads, and another set of first contact pads connected to the second terminal group is defined as the second set of contact pads. A set of first fingers connected to the first terminal group is defined as the first set of fingers, and another set of first fingers connected to the second terminal group is defined as the second set of fingers. The first set of fingers is offset by a third distance relative to the second set of fingers on the same side in the front-back direction. The first set of contact pads is offset by a fourth distance relative to the second set of contact pads on the same side in the front-back direction. The third distance is equal to the fourth distance, and the first distance is equal to the third distance.

[0018] Furthermore, the first conductive portion is formed by bending backward from one end of the first connecting portion; the circuit board is provided with a plurality of second contact pads, the first contact pad and the second contact pad are located on the same surface of the circuit board; the electronic card is provided with a plurality of second fingers, the first finger and the second finger are located on the upper and lower opposite surfaces of the electronic card; the electrical connector further includes a second insulator and a plurality of second conductive terminals disposed on the second insulator, the plurality of second conductive terminals are arranged in a left-right direction, the first insulator and the second insulator are fixedly connected, and each second conductive terminal includes a second contact portion, a second conductive portion and a connection to the second contact portion. A second connecting portion is provided between the contact portion and the second conductive portion. The second contact portion is located in front of the second conductive portion and is exposed in the insertion cavity for connecting with the second hand guide. The second conductive portion is bent forward from one end of the second connecting portion and exposes the body for connecting with the second contact pad. The second connecting portion is fixed to the second insulator. A plurality of second conductive terminals include at least one third terminal group and at least one fourth terminal group. The at least one third terminal group and the at least one fourth terminal group are arranged alternately in the left-right direction. The third terminal group includes a third differential signal pair and a terminal located at the third differential signal pair. The fourth terminal group includes a fourth differential signal pair and two third grounding terminals located on the left and right sides of the fourth differential signal pair and adjacent to the fourth differential signal pair. For the same third terminal group, multiple second contacts are aligned in the left-right direction, multiple second connecting portions are aligned in the left-right direction, and multiple second conductive portions are aligned in the left-right direction. For the same fourth terminal group, multiple second contacts are aligned in the left-right direction, multiple second connecting portions are aligned in the left-right direction, and multiple second conductive portions are aligned in the left-right direction. The components are aligned in the left-right direction; the second contact portion of the third terminal group is offset by a fifth distance relative to the second contact portion of the fourth terminal group in the front-back direction; one set of second contact pads connected to the third terminal group is defined as the third set of contact pads, and another set of second contact pads connected to the fourth terminal group is defined as the fourth set of contact pads; one set of second fingers connected to the third terminal group is defined as the third set of fingers, and another pair of second fingers connected to the fourth terminal group is defined as the fourth set of fingers, and the third set of fingers is offset by a sixth distance relative to the fourth set of fingers in the front-back direction, and the fifth distance is equal to the sixth distance.

[0019] Furthermore, the electronic card has multiple first paths, each first path connecting to a corresponding second finger and the second contact portion of the conductive part. A set of first paths connected to the third group of fingers is defined as the first set of paths, and another set of first paths connected to the fourth group of fingers is defined as the second set of paths. The upper surface of the circuit board has multiple second paths, each second path connecting to a corresponding second contact pad and the second conductive part of the conductive part. A set of second paths connected to the third group of contact pads is defined as the third set of paths, and a set of second paths connected to the fourth group of contact pads is defined as the fourth set of paths. The sum of the length of each first path in the first set of paths, the length of the conductive path between the second contact portion and the second conductive part of each of the third terminal groups, and the length of each second path in the third set of paths is equal to the sum of the length of each first path in the second set of paths, the length of the conductive path between the second contact portion and the second conductive part of each of the fourth terminal groups, and the length of each second path in the fourth set of paths.

[0020] Furthermore, the first distance in the front-back direction is smaller than the first finger in the front-back direction, and the second distance in the front-back direction is smaller than the first contact pad in the front-back direction.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Crosstalk is generated by the mutual coupling between two adjacent differential signal pairs through mutual capacitance and mutual inductance, and is directly proportional to mutual capacitance and mutual inductance. The distance between two adjacent differential signal pairs is inversely proportional to both mutual capacitance and mutual inductance. The magnetic force between two adjacent differential signal pairs represents the magnitude of the crosstalk. The essence of crosstalk is the energy magnitude of this interaction, determined by mutual capacitance and mutual inductance. By changing the positions of the contact and conductive parts of two adjacent terminal groups—that is, by shifting the first contact of the first terminal group relative to the first contact of the second terminal group on one side in the front-back direction, and shifting the first conductive part of the first terminal group relative to the first conductive part of the second terminal group on the same side in the front-back direction—the distance between the first differential signal pair and the second differential signal pair in the two adjacent terminal groups is increased, reducing the crosstalk between the two adjacent differential signal pairs. Furthermore, the aforementioned shift distances are set to be equal, and the length of the conduction path between the first contact and the first conductive part of the first differential signal pair and the length of the conduction path between the first contact and the first conductive part of the second differential signal pair are equal. The conduction path between the contact portion and the first conductive portion has the same length, avoiding problems such as unequal timing and signal quality degradation caused by unequal signal transmission paths of differential signal pairs, thereby improving high-frequency characteristics; and placing the two first ground terminals on the left and right sides of the first differential signal pair and adjacent to the first differential signal pair, and placing the two second ground terminals on the left and right sides of the second differential signal pair and adjacent to the second differential signal pair, and arranging the two first ground terminals and the two second ground terminals side by side with the first differential signal pair, so that the two first ground terminals can shield the opposite sides of the first differential signal pair, and the two second ground terminals can shield the opposite sides of the second differential signal pair, that is, each terminal group has corresponding two ground terminals to absorb the electromagnetic radiation generated by the corresponding differential signal pair, thereby suppressing the mutual capacitance and mutual inductance between the first differential signal pair and the second differential signal pair, thereby further reducing the mutual interference between two adjacent differential signal pairs. Attached Figure Description

[0023] Figure 1 This is an exploded perspective view of the connector assembly of the present invention;

[0024] Figure 2 for Figure 1 An exploded perspective view of the electrical connector of the present invention;

[0025] Figure 3 for Figure 1 A sectional view taken along a plane that is parallel to both the front-back and up-down directions and is cut along a plane that is parallel to the plane defined by the front-back and up-down directions.

[0026] Figure 4 for Figure 2 A schematic diagram of the first conductive terminal;

[0027] Figure 5 for Figure 1 The diagram shows only the first terminal group and the second terminal group when they are connected to the electronic card and the circuit board.

[0028] Figure 6 for Figure 5 The image shows only the side view of the first differential signal pair and the second differential signal pair.

[0029] Figure 7 for Figure 1 The diagram shows only the third and fourth terminal groups when they are connected to the electronic card and circuit board.

[0030] Figure 8 for Figure 7 A schematic diagram showing the hidden circuit board from another perspective;

[0031] Figure 9 for Figure 7 The image only shows the side views of the third and fourth differential signal pairs;

[0032] Figure 10 for Figure 1 The image shows only a top view of the top surface of the electronic card;

[0033] Figure 11 for Figure 1 The diagram only shows the lower surface of the electronic card;

[0034] Figure 12 for Figure 1 The image shows only a top view of the top surface of the circuit board.

[0035] Explanation of reference numerals in the accompanying drawings for the specific implementation methods:

[0036] Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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 designed to mate with the electrical connector 100.

[0041] 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.

[0042] like Figure 2 and Figure 3 As shown, the electrical connector 100 further includes a first insulator 3, a plurality of first conductive terminals 4 disposed on the first insulator 3, a second insulator 5, and a plurality of second conductive terminals 6 disposed on the second insulator 5. The first insulator 3 has a plurality of first surfaces 31 and a plurality of second surfaces 32 on its front end face. The first surface 31 is offset to one side relative to the second surface 32 in the front-rear direction. The first surface 31 is located in front of the second surface 32 in the front-rear direction. The plurality of first conductive terminals 4 and the plurality of second conductive terminals 6 are exposed on the body 2 and soldered to the circuit board 300. The plurality of first conductive terminals 4 are embedded in the first insulator 3. The plurality of second conductive terminals 6 are arranged in the left-right direction and embedded in the second insulator 5. The second insulator 5 and the first insulator 3 are installed together on the body 2.

[0043] like Figure 3 and Figure 4 As shown, each of the first conductive terminals 4 has a first contact portion 41, a first conductive portion 42, and a first connecting portion 43 connecting the first contact portion 41 and the first conductive portion 42. The first contact portion 41 is located in front of the first conductive portion 42. The first conductive portion 42 is formed by bending backward from one end of the first connecting portion 43 and exposing the body 2 and soldering it to the circuit board 300.

[0044] like Figure 4As shown, the plurality of first conductive terminals 4 include a plurality of differential signal pairs. One of two differential signal pairs arranged in a left-right direction and adjacent to each other is defined as a first differential signal pair S1 and the other as a second differential signal pair S2. The plurality of first conductive terminals 4 include a plurality of first differential signal pairs S1 and a plurality of second differential signal pairs S2. The plurality of first differential signal pairs S1 and the plurality of second differential signal pairs S2 are arranged alternately in a left-right direction. The two first conductive terminals 4 in the first differential signal pair S1 are arranged symmetrically in the left and right directions, and the two first conductive terminals 4 in the second differential signal pair S2 are arranged symmetrically in the left and right directions.

[0045] like Figure 2 and Figure 4 As shown, the plurality of first conductive terminals 4 include a plurality of first terminal groups W1 and a plurality of second terminal groups W2, which are arranged alternately in the left-right direction. In other embodiments, each of the first terminal group W1 and the second terminal group W2 may be provided with only one, or one may be provided with multiple and the other with only one.

[0046] like Figure 2 , Figure 4 and Figure 5 As shown, the first terminal group W1 includes a first differential signal pair S1 and two first ground terminals G1 located on the left and right sides of the first differential signal pair S1 and adjacent to the first differential signal pair S1. The second terminal group W2 includes a second differential signal pair S2 and two second ground terminals G2 located on the left and right sides of the second differential signal pair S2 and adjacent to the second differential signal pair S2. A plurality of first connecting portions 43 of the first terminal group W1 protrude forward from the first surface 31, and a plurality of first connecting portions 43 of the second terminal group W2 protrude forward from the second surface 32.

[0047] like Figure 4 and Figure 5 As shown, for the same first terminal group W1, the first differential signal pair S1 and the first ground terminal G1 are arranged side by side in the left-right direction, and the second differential signal pair S2 and the second ground terminal G2 are arranged side by side in the left-right direction. Specifically, a plurality of first contact portions 41 are aligned in the left-right direction, a plurality of first connection portions 43 are aligned in the left-right direction, and a plurality of first conductive portions 42 are aligned in the left-right direction. For the same second terminal group W2, a plurality of first contact portions 41 are aligned in the left-right direction, a plurality of first connection portions 43 are aligned in the left-right direction, and a plurality of first conductive portions 42 are aligned in the left-right direction.

[0048] like Figure 2 and Figure 4 As shown, in this embodiment, all the first contact portions 41, first conductive portions 42 and first connecting portions 43 in all the first terminal groups W1 are aligned in the left-right direction; all the first contact portions 41, first conductive portions 42 and first connecting portions 43 in all the second terminal groups W2 are aligned in the left-right direction.

[0049] like Figure 4 and Figure 5 As shown, the first conductive terminals 4 in the same position arranged sequentially in the left-right direction of the first terminal group W1 and the second terminal group W2 have the same structure. That is, the first conductive terminal 4 on the left side of the first differential signal pair S1 has the same structure as the first conductive terminal 4 on the left side of the second differential signal pair S2, the first conductive terminal 4 on the right side of the first differential signal pair S1 has the same structure as the first conductive terminal 4 on the right side of the second differential signal pair S2, the first ground terminal G1 on the left side of the first differential signal pair S1 has the same terminal structure as the second ground terminal G2 on the left side of the second differential signal pair S3, and the first ground terminal G1 on the right side of the first differential signal pair S1 has the same terminal structure as the second ground terminal G2 on the right side of the second differential signal pair S3. In this embodiment, the first ground terminal G1 and the second ground terminal G2 have the same structure.

[0050] like Figure 5 and Figure 6 As shown, the length of the conduction path between the first contact portion 41 and the first conductive portion 42 of the first differential signal pair S1 is the same as the length of the conduction path between the first contact portion 41 and the first conductive portion 42 of the second differential signal pair S2.

[0051] like Figure 5 and Figure 6 As shown, the first contact portion 41 of the first terminal group W1 is offset to one side in the front-rear direction relative to the first contact portion 41 of the second terminal group W2, and the first conductive portion 42 of the first terminal group W1 is offset to the same side in the front-rear direction relative to the first conductive portion 42 of the second terminal group W2. In this embodiment, the first contact portion 41 of the first terminal group W1 is offset forward relative to the first contact portion 41 of the second terminal group W2, and the first conductive portion 42 of the first terminal group W1 is also offset forward relative to the first conductive portion 42 of the second terminal group W2 in the front-rear direction.

[0052] like Figure 2 , Figure 5 and Figure 6As shown, the distance by which the first contact portion 41 of the first terminal group W1 and the first contact portion 41 of the second terminal group W2 are offset in the front-back direction is defined as the first distance L1, and the distance by which the first conductive portion 42 of the first terminal group W1 and the first conductive portion 42 of the second terminal group W2 are offset in the front-back direction is defined as the second distance L2. The first distance L1 is equal to the second distance L2. The size of the first distance L1 in the front-back direction is smaller than the size K1 of the first finger 7a in the front-back direction, and the size of the second distance L2 in the front-back direction is smaller than the size K2 of the first contact pad 8a in the front-back direction. The distance by which the first contact portion 41 of the first terminal group W1 and the first contact portion 41 of the second terminal group W2 are offset in the front-back direction is the same as the distance by which the first surface 31 is offset relative to the second surface 32 in the front-back direction.

[0053] like Figure 5 and Figure 6 As shown, the first connecting portion 43 of the first terminal group W1 and the first connecting portion 43 of the second terminal group W2 are partially offset in the vertical direction, and the first connecting portion 43 of the first terminal group W1 and the first connecting portion 43 of the second terminal group W2 are partially offset in the front-back direction. Specifically, the portion of the first connecting portion 43 of the first terminal group W1 near the corresponding first contact portion 41 is located above the portion of the first connecting portion 43 of the second terminal group W2 near the corresponding first contact portion 41, and the portion of the first connecting portion 43 of the first terminal group W1 near the corresponding first conductive portion 42 is located in front of the portion of the first connecting portion 43 of the second terminal group W2 near the corresponding first conductive portion 41. Thus, when viewed in the left-right direction, the first connecting portion 43 of the first terminal group W1 and the first connecting portion 43 of the second terminal group W2 form an intersection.

[0054] like Figure 2 and Figure 3 As shown, each of the second conductive terminals 6 has a second contact portion 61, a second conductive portion 62, and a second connecting portion 63 connecting the second contact portion 61 and the second conductive portion 62. The second contact portion 61 is located in front of the second conductive portion 62, and the second contact portion 61 and the first contact portion 41 are located on opposite sides of the insertion cavity 21 and are respectively exposed in the insertion cavity 21. The second conductive portion 62 is formed by bending forward from one end of the second connecting portion 63, and exposes the body 2 and is soldered to the circuit board 300.

[0055] like Figure 2 and Figure 8As shown, the plurality of second conductive terminals 6 include a plurality of differential signal pairs. One of 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 6 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.

[0056] like Figure 7 , Figure 8 and Figure 9 As shown, the second conductive terminal 6 on the left side of the third differential signal pair S3 has a different structure than the second conductive terminal 6 on the left side of the fourth differential signal pair S4, and the second conductive terminal 6 on the right side of the third differential signal pair S3 also has a different structure than the second conductive terminal 6 on the right side of the fourth differential signal pair S4.

[0057] like Figure 2 As shown, the plurality of second conductive terminals 6 include a plurality of third terminal groups W3 and a plurality of fourth terminal groups W4, which are arranged alternately in the left-right direction. In other embodiments, each of the third terminal group W3 and the fourth terminal group W4 may be provided as a single unit, or one of them may be provided in multiple units while the other is provided as a single unit.

[0058] like Figure 7 and Figure 8 As shown, the third terminal group W3 includes a third differential signal pair S3 and two third grounding terminals G3 located on the left and right sides of the third differential signal pair S3 and adjacent to the third differential signal pair S3. The fourth terminal group W4 includes a fourth differential signal pair S4 and two fourth grounding terminals G4 located on the left and right sides of the fourth differential signal pair S4 and adjacent to the fourth differential signal pair S4.

[0059] like Figure 7 and Figure 8 As shown, for the same third terminal group W3, the third differential signal pair S3 and the third ground terminal G3 are arranged side by side in the left-right direction, and the fourth differential signal pair S4 and the fourth ground terminal G4 are arranged side by side in the left-right direction. Specifically, a plurality of second contact portions 61 are aligned in the left-right direction, a plurality of second connection portions 63 are aligned in the left-right direction, and a plurality of second conductive portions 62 are aligned in the left-right direction. For the same fourth terminal group W4, a plurality of second contact portions 61 are aligned in the left-right direction, a plurality of second connection portions 63 are aligned in the left-right direction, and a plurality of second conductive portions 62 are aligned in the left-right direction.

[0060] like Figure 8 and Figure 9 As shown, the second contact portion 61 of the third terminal group W3 is offset to one side in the front-rear direction relative to the second contact portion 61 of the fourth terminal group W4. The second conductive portion 62 of the third terminal group W3 and the second conductive portion 62 of the fourth terminal group W4 are aligned in the left-right direction. In this embodiment, the second contact portion 61 of the third terminal group W3 is positioned further forward in the front-rear direction relative to the second contact portion 61 of the fourth terminal group W4. The second conductive portion 62 of the third terminal group W3 and the second conductive portion 62 of the fourth terminal group W4 are arranged side by side in the front-rear direction. The second connecting portion 63 of the third terminal group W3 and the second connecting portion 63 of the fourth terminal group W4 are partially offset in the vertical direction. When viewed from the left-right direction, the second connecting portion 63 of the third terminal group W3 and the second connecting portion 63 of the fourth terminal group W4 form an intersection.

[0061] like Figure 9 As shown, the second connection portion 63 of the third differential signal pair S3 and the second connection portion 63 of the fourth differential signal pair S4 are partially offset in the vertical direction. When viewed in the horizontal direction, the second connection portion 63 of the third differential signal pair S3 and the second connection portion 63 of the fourth differential signal pair S4 form an intersection.

[0062] like Figure 7 , Figure 8 , Figure 10 and Figure 11 As 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 41 of the plurality of first conductive terminals 4. 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 61 of the plurality of second conductive terminals 6.

[0063] like Figure 5 , Figure 8 , Figure 10 and Figure 11As shown, on the upper surface of the electronic card 200, four consecutive adjacent first fingers 7a form a group that makes contact with the four first contact portions 41 of a corresponding first terminal group W1, and another four consecutive adjacent first fingers 7a form a group that makes contact with the four first contact portions 41 of a corresponding second terminal group W2. On the lower surface of the electronic card 200, four consecutive adjacent second fingers 7b form a group that makes contact with the four second contact portions 61 of a corresponding third terminal group W3, and another four consecutive adjacent second fingers 7b form a group that makes contact with the four second contact portions 61 of a corresponding fourth terminal group W4. The four first fingers 7a connected to the first terminal group W1 are defined as the first group of fingers 71, the other four first fingers 7a connected to the second terminal group W2 are defined as the second group of fingers 72, the four second fingers 7b connected to the third terminal group W3 are defined as the third group of fingers 73, and the other four second fingers 7b connected to the fourth terminal group W4 are defined as the fourth group of fingers 74.

[0064] like Figure 5 , Figure 8 , Figure 10 and Figure 11 As shown, the electronic card 200 also has multiple first paths M and multiple third paths P. Each first path M is connected to the guide point of a corresponding second finger 7b and the second contact portion 61. The four first paths M connected to the third group of fingers 73 are defined as the first group of paths M1, and the other four first paths M connected to the fourth group of fingers 74 are defined as the second group of paths M2. Each third path P is connected to the guide point of a corresponding first finger 7a and the first contact portion 41. The four third paths P connected to the first group of fingers 71 are defined as the fifth group of paths P1, and the other four third paths P connected to the second group of fingers 72 are defined as the sixth group of paths P2.

[0065] 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 in 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 42 of the plurality of first conductive terminals 4. The first conductive portions 42 and the first contact pads 8a are connected by soldering. The plurality of second contact pads 8b are arranged at intervals in 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 62 of the plurality of second conductive terminals 6. The second conductive portions 62 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.

[0066] like Figure 5 , Figure 7 and Figure 12 As shown, on the upper surface of the circuit board 300, four consecutive adjacent first contact pads 8a form a group that are connected one-to-one with the four first conductive portions 42 of a corresponding first terminal group W1; another four consecutive adjacent first contact pads 8a form a group that are connected one-to-one with the four first conductive portions 42 of a corresponding second terminal group W2; four consecutive adjacent second contact pads 8b form a group that are connected one-to-one with the four second conductive portions 62 of a corresponding third terminal group W3; another four consecutive adjacent second contact pads 8b form a group that are connected one-to-one with the four second conductive portions 62 of a corresponding fourth terminal group W4. The four first contact pads 8a connected to the first terminal group W1 are defined as the first group of contact pads 81, the other four first contact pads 8a connected to the second terminal group W2 are defined as the second group of contact pads 82, the four second contact pads 8b connected to the third terminal group W3 are defined as the third group of contact pads 83, and the other pair of second contact pads 8b connected to the fourth terminal group W4 are defined as the fourth group of contact pads 84.

[0067] like Figure 5 , Figure 10 and Figure 12 As shown, the first group of fingers 71 is shifted forward by a third distance L3 relative to the second group of fingers 72, and the first group of contact pads 81 is shifted forward by a fourth distance L4 relative to the second group of contact pads 82. The third distance L3 is equal to the fourth distance L4, the first distance L1 is equal to the third distance L3, and the second distance L2 is equal to the fourth distance L4.

[0068] like Figure 5 , Figure 7 and Figure 12 As shown, the circuit board 300 also has a plurality of second paths N and a plurality of fourth paths Q. Each second path N is connected to the connection point between a corresponding second contact pad 8b and the second conductive part 62. The four second paths N connected to the third group of contact pads 83 are defined as the third group of paths N1, and the other four second paths N connected to the fourth group of contact pads 84 are defined as the fourth group of paths N2. Each fourth path Q is connected to the connection point between a corresponding first contact pad 8a and the first conductive part 42. The four fourth paths Q connected to the first group of contact pads 81 are defined as the seventh group of paths Q1, and the other four fourth paths Q connected to the second group of contact pads 82 are defined as the eighth group of paths Q2.

[0069] like Figure 9 and Figure 12 As shown, the second contact portion 61 of the third terminal group W3 is shifted forward by a fifth distance L5 relative to the second contact portion 61 of the fourth terminal group W4, and the third group of fingers 73 is shifted forward by a sixth distance L6 relative to the fourth group of fingers 74, where the fifth distance L5 is equal to the sixth distance L6. The third group of contact pads 83 and the fourth group of contact pads 84 are aligned in the left-right direction.

[0070] like Figure 9 and Figure 11 As shown, the sum of the length of each first path M in the first group of paths M1, the length of the conductive path between the second contact portion 61 and the second conductive portion 62 in each of the third terminal groups W3, and the length of each second path N in the third group of paths N1 is equal to the sum of the length of each first path M in the second group of paths M2, the length of the conductive path between the second contact portion 61 and the second conductive portion 62 in each of the fourth terminal groups W4, and the length of each second path N in the fourth group of paths N2.

[0071] like Figure 6 , Figure 10 and Figure 12As shown, the sum of the lengths of the third paths P in the fifth group of paths P1, the length of the conductive path between the first contact portion 41 and the first conductive portion 42 in each of the first terminal groups W1, and the length of the fourth paths Q in the seventh group of paths Q1 is equal to the sum of the lengths of the third paths P in the sixth group of paths P2, the length of the conductive path between the first contact portion 41 and the first conductive portion 42 in the second terminal group W2, and the length of the fourth paths Q in the eighth group of paths Q2.

[0072] The electrical connector and connector assembly of the present invention also have the following beneficial effects:

[0073] 1. By shifting the first contact portion 41 of the first terminal group W1 to one side in the front-back direction relative to the first contact portion 41 of the second terminal group W2, and shifting the first conductive portion 42 of the first terminal group W1 to the same side in the front-back direction relative to the first conductive portion 42 of the second terminal group W2, the distance between two adjacent differential signal pairs is increased, crosstalk between two adjacent differential signal pairs is reduced, thereby improving high-frequency crosstalk.

[0074] 2. In each terminal group, there are two grounding terminals arranged side-by-side on opposite sides of the differential signal pair. Specifically, in the first terminal group, two first grounding terminals G1 are placed on the left and right sides of the first differential signal pair S1 and adjacent to it, side-by-side, so that the two first grounding terminals G1 can shield the opposite sides of the first differential signal pair S1 and absorb the electromagnetic radiation generated by the two first conductive terminals 4 in the first differential signal pair S1. Two second grounding terminals G2 are placed on the left and right sides of the second differential signal pair S2 and adjacent to it, and the two second grounding terminals G1 are arranged side-by-side with the first differential signal pair S1. The ground terminal G2 and the second differential signal pair S2 are arranged side by side, so that the two second ground terminals G2 can shield the opposite sides of the second differential signal pair S2 and absorb the electromagnetic radiation generated by the two first conductive terminals 4 in the second differential signal pair S2. That is, each terminal group has two corresponding ground terminals to shield the corresponding differential signal pair, to suppress the mutual capacitance and mutual inductance between the first differential signal pair S1 and the second differential signal pair S2, thereby further reducing the mutual interference between the two adjacent differential signal pairs. Moreover, the effect of the two first ground terminals G1 on the first differential signal pair S1 is balanced, and the effect of the first ground terminals G1 on the left and right sides of the second differential signal pair S2 is also balanced.

[0075] 3. By partially offsetting the first connection portion 43 of the first terminal group W1 and the first connection portion 43 of the second terminal group W2 in the vertical direction, and partially offsetting the first connection portion 43 of the first terminal group W1 and the first connection portion 43 of the second terminal group W2 in the front-back direction, the distance between the two first connection portions 43 of two adjacent differential signal pairs in the first terminal group W1 and the second terminal group W2 is increased, thereby reducing the mutual interference between two adjacent differential signal pairs.

[0076] 4. The length of the conduction path between the first contact portion 41 and the first conductive portion 42 of the first differential signal pair S1 is the same as the length of the conduction path between the first contact portion 41 and the first conductive portion 42 of the second differential signal pair S2, thereby reducing the delay difference between adjacent differential signal pairs.

[0077] 5. After the first terminal group W1 and the second terminal group W2 are staggered, the first group of fingers 71 and the second group of fingers 72, the first group of contact pads 81 and the second group of contact pads 82 are displaced accordingly. This makes the sum of the length of each third path P in the fifth path P1, the length of the conductive path between the first contact part 41 and the first conductive part 42 of the first terminal group W1, and the length of each fourth path Q in the seventh path Q1 equal to the sum of the length of each third path P in the sixth path P2, the length of the conductive path between the first contact part 41 and the first conductive part 42 of the second terminal group W2, and the length of each fourth path Q in the eighth path Q2. This reduces the delay difference between the first differential signal pair S1 and the second differential signal pair S2, and avoids the Skew problem caused by excessive signal transmission path drop.

[0078] 6. After the second contact portion 61 of the third terminal group W3 and the second contact portion 61 of the fourth terminal group W4 are staggered, the bending direction of the second conductive portion 62 is opposite to the bending direction of the first conductive portion 42. Furthermore, the different bending methods of the second connection portion 63 of the third differential signal pair S3 and the second connection portion 63 of the fourth differential signal pair S4 not only facilitate wiring on the circuit board 300 but also ensure the continuity between the length of each first path M in the first group of paths M1 and between the second contact portion 61 and the second conductive portion 62 of the third differential signal pair S3. The sum of the length of the path, the length of each second path N in the third group of paths N1, and the length of each first path M in the second group of paths M2, the length of the conduction path between the second contact 61 and the second conductive part 62 of the fourth differential signal pair S4, and the length of each second path N in the fourth group of paths N2, is equal to the sum of the length of the first path M in the second group of paths M2, the length of the conduction path between the second contact 61 and the second conductive part 62 of the fourth differential signal pair S4, and the length of each second path N in the fourth group of paths N2. That is, by misaligning the length or height of the terminals, the signal transmission distance is compensated to be consistent, the delay difference between the third differential signal pair S3 and the fourth differential signal pair S4 is reduced, and the Skew problem caused by excessive signal transmission path drop is avoided.

[0079] 7. Because the plurality of first contact portions 41 of the first terminal group W1 are offset to one side in the front-back direction by a distance relative to the plurality of first contact portions 41 of the second terminal group W2, and the plurality of first conductive portions 42 of the first terminal group W1 are also offset to the same side in the front-back direction by a distance relative to the plurality of first conductive portions 42 of the second terminal group W2, and the first surface 31 is also offset to the same side in the front-back direction of the second surface 32, the distance offset between the first contact portions 41 of the first terminal group W1 and the first contact portions 41 of the second terminal group W2 in the front-back direction is the same as the distance offset between the first surface 31 and the second surface 32 in the front-back direction. This makes the area of ​​the plurality of first terminals 4 of the first terminal group W1 covered by plastic approximately the same as the area of ​​the plurality of first terminals 4 of the second terminal group W2 covered by plastic. That is, it is equivalent to the position and area of ​​the plurality of first connecting portions 43 of the first terminal group W1 and the plurality of first connecting portions 43 of the second terminal group W2 exposed to air being approximately the same, thus ensuring the stability of signal transmission between the two terminal groups.

[0080] 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; A plurality of 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 at least one first terminal group and at least one second terminal group, which are alternately arranged in a left-right direction. The first terminal group includes a first differential signal pair and two first ground terminals located on the left and right sides of the first differential signal pair and adjacent to the first differential signal pair. The second terminal group includes a second differential signal pair and two second ground terminals located on the left and right sides of the second differential signal pair and adjacent to the second differential signal pair. For the same first terminal group, the plurality of first contact portions are aligned in a left-right direction, the plurality of first connecting portions are aligned in a left-right direction, and the plurality of first conductive portions are aligned in a left-right direction. For the same second terminal group, multiple first contacts are aligned in the left-right direction, multiple first connecting portions are aligned in the left-right direction, and multiple first conductive portions are aligned in the left-right direction; the first contacts of the first terminal group are offset to one side in the front-back direction relative to the first contacts of the second terminal group, and the first conductive portions of the first terminal group are offset to the same side in the front-back direction relative to the first conductive portions of the second terminal group. The distance between the offset of the first contacts of the first terminal group and the first contacts of the second terminal group in the front-back direction is defined as a first distance, and the distance between the offset of the first conductive portions of the first terminal group and the first conductive portions of the second terminal group in the front-back direction is defined as a second distance. The first distance is equal to the second distance, and the length of the conduction path between the first contacts and the first conductive portions of the first differential signal pair is the same as the length of the conduction path between the first contacts and the first conductive portions of the second differential signal pair.

2. 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.

3. The electrical connector according to claim 1, characterized in that: Viewed from the left and right, the first connecting portion of the first terminal group and the first connecting portion of the second terminal group are at least partially offset from each other in the vertical direction, and the first connecting portion of the first terminal group and the first connecting portion of the second terminal group are at least partially offset from each other in the front and back direction.

4. The electrical connector according to claim 1, characterized in that: The system further includes a second insulator and a plurality of second conductive terminals disposed on the second insulator. The plurality of second conductive terminals are arranged in a left-right direction. The first insulator is fixedly connected to 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 second conductive terminals include at least one third terminal group and at least one fourth terminal group. The at least one third terminal group and the at least one fourth terminal group are arranged alternately in a left-right direction. The third terminal group includes a third differential signal pair and two terminals located on the left and right sides of the third differential signal pair and adjacent to the third differential signal pair. The third grounding terminal, the fourth terminal group includes a fourth differential signal pair and two fourth grounding terminals located on the left and right sides of the fourth differential signal pair and adjacent to the fourth differential signal pair; for the same third terminal group, a plurality of second contacts are aligned in the left and right direction, a plurality of second connections are aligned in the left and right direction, and a plurality of second conductive parts are aligned in the left and right direction; for the same fourth terminal group, a plurality of second contacts are aligned in the left and right direction, a plurality of second connections are aligned in the left and right direction, and a plurality of second conductive parts are aligned in the left and right direction; the second contacts of the third terminal group are offset to one side in the front-back direction relative to the second contacts of the fourth terminal group.

5. The electrical connector according to claim 4, characterized in that: The second conductive portion of the third terminal group and the second conductive portion of the fourth terminal group are aligned in the left-right direction. When viewed in the left-right direction, the second connecting portion of the third terminal group and the second connecting portion of the fourth terminal group are at least partially offset in the up-down direction.

6. The electrical connector according to claim 4, characterized in that: The device further includes a body and a metal shell covering the body. The body includes a insertion cavity that extends forward through the body. A first insulator and a second insulator are mounted on the body. A first contact portion and a second contact portion are located on the upper and lower sides of the insertion cavity and are respectively exposed in the insertion cavity.

7. An electrical connector, characterized in that, include: The first insulator; A plurality of first conductive terminals are arranged along 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 at least one first terminal group and at least one second terminal group. The at least one first terminal group and the at least one second terminal group are arranged alternately in a left-right direction. The first terminal group includes a first differential signal pair and two first ground terminals located on the left and right sides of the first differential signal pair and disposed adjacent to the first differential signal pair. The first differential signal pair and the first ground terminals are arranged along a left-right direction. The second terminal group is arranged side by side in the left-right direction. It includes a second differential signal pair and two second ground terminals located on the left and right sides of the second differential signal pair and adjacent to the second differential signal pair. The second differential signal pair and the second ground terminals are arranged side by side in the left-right direction. The first contact portion of the first differential signal pair is offset to one side in the front-back direction relative to the first contact portion of the second differential signal pair. The first conductive portion of the first differential signal pair is offset to the same side in the front-back direction relative to the first conductive portion of the second differential signal pair. The first conductive terminals of the first terminal group and the second terminal group are arranged in the same position in the left-right direction with the same structure.

8. The electrical connector according to claim 7, characterized in that: Viewed from the left and right, the first connection portion of the first differential signal pair in the first terminal group and the first connection portion of the second differential signal pair in the second terminal group are at least partially offset from each other in the vertical direction, and the first connection portion of the first differential signal pair in the first terminal group and the first connection portion of the second differential signal pair in the second terminal group are at least partially offset from each other in the front and back direction.

9. The electrical connector according to claim 7, characterized in that: The plurality of first conductive terminals include a plurality of first terminal groups and a plurality of second terminal groups; for all the first terminal groups, a plurality of first contact portions are aligned in the left-right direction, a plurality of first connection portions are aligned in the left-right direction, and a plurality of first conductive portions are aligned in the left-right direction; for all the second terminal groups, a plurality of first contact portions are aligned in the left-right direction, a plurality of first connection portions are aligned in the left-right direction, and a plurality of first conductive portions are aligned in the left-right direction.

10. The electrical connector according to claim 7, characterized in that: The first insulator has at least one first surface and at least one second surface on its front end face, the first surface being offset relative to the second surface on the same side in the front-rear direction, a plurality of first connecting portions of the first terminal group protruding forward from the first surface, and a plurality of first connecting portions of the second terminal group protruding forward from the second surface.

11. The electrical connector according to claim 10, characterized in that: The distance by which the first contact portion of the first terminal group and the first contact portion of the second terminal group are offset in the front-back direction is the same as the distance by which the first surface is offset in the front-back direction relative to the second surface.

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 includes a body, a first insulator disposed on the body, and a plurality of first conductive terminals disposed on the first insulator. The main body 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. The first contact portion is exposed in the insertion cavity for connecting with the first hand guide. The first conductive portion is exposed in the body for connecting with the first contact pad. The first connecting portion is fixed to the first insulator. The plurality of first conductive terminals include at least one first terminal group and at least one second terminal group, wherein the at least one first terminal group and the at least one second terminal group are arranged alternately in the left-right direction. The first terminal group includes a first differential signal pair and two first ground terminals located on the left and right sides of the first differential signal pair and adjacent to the first differential signal pair. The second terminal group includes a second differential signal pair and two second ground terminals located on the left and right sides of the second differential signal pair and adjacent to the second differential signal pair. For the same first terminal group, multiple first contacts are aligned in the left-right direction, multiple first connecting portions are aligned in the left-right direction, and multiple first conductive portions are aligned in the left-right direction; for the same second terminal group, multiple first contacts are aligned in the left-right direction, multiple first connecting portions are aligned in the left-right direction, and multiple first conductive portions are aligned in the left-right direction; the first contact of the first terminal group is offset by a first distance relative to the first contact of the second terminal group on one side in the front-back direction, and the first conductive portion of the first terminal group is offset by a second distance relative to the first conductive portion of the second terminal group on the same side in the front-back direction, the first distance being equal to the second distance; the length of the conduction path between the first contact 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 and the first conductive portion of the second differential signal pair. A set of first contact pads connected to the first terminal group is defined as the first set of contact pads, and another set of first contact pads connected to the second terminal group is defined as the second set of contact pads. A set of first fingers connected to the first terminal group is defined as the first set of fingers, and another set of first fingers connected to the second terminal group is defined as the second set of fingers. The first set of fingers is offset by a third distance relative to the second set of fingers on the same side in the front-back direction. The first set of contact pads is offset by a fourth distance relative to the second set of contact pads on the same side in the front-back direction. The third distance is equal to the fourth distance, and the first distance is equal to the third distance.

13. The connector assembly according to claim 12, characterized in that: The first conductive portion is formed by bending backward from one end of the first connecting portion; The circuit board is provided with a plurality of second contact pads, and the first contact pad and the second contact pad are located on the same surface of the circuit board; The electronic card is provided with multiple second fingers, and the first finger and the second finger are located on the upper and lower opposite surfaces of the electronic card; The electrical connector further includes a second insulator and a plurality of second conductive terminals disposed on the second insulator. The plurality of second conductive terminals are arranged in a left-right direction. The first insulator is fixedly connected to 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 and is exposed in the insertion cavity for contacting the second hand. The second conductive portion is bent forward from one end of the second connecting portion and exposed to the body for contacting the second contact pad. The second connecting portion is fixed to the second insulator. The plurality of second conductive terminals include at least one third terminal group and at least one fourth terminal group, wherein the at least one third terminal group and the at least one fourth terminal group are arranged alternately in the left-right direction. The third terminal group includes a third differential signal pair and two third ground terminals located on the left and right sides of the third differential signal pair and adjacent to the third differential signal pair. The fourth terminal group includes a fourth differential signal pair and two fourth ground terminals located on the left and right sides of the fourth differential signal pair and adjacent to the fourth differential signal pair. For the same third terminal group, a plurality of second contact portions are aligned in the left-right direction, a plurality of second connecting portions are aligned in the left-right direction, and a plurality of second conductive portions are aligned in the left-right direction; for the same fourth terminal group, a plurality of second contact portions are aligned in the left-right direction, a plurality of second connecting portions are aligned in the left-right direction, and a plurality of second conductive portions are aligned in the left-right direction; the second contact portion of the third terminal group is offset by a fifth distance on one side in the front-back direction relative to the second contact portion of the fourth terminal group. A set of second contact pads connected to the third terminal group is defined as the third set of contact pads, and another set of second contact pads connected to the fourth terminal group is defined as the fourth set of contact pads; a set of second fingers connected to the third terminal group is defined as the third set of fingers, and another pair of second fingers connected to the fourth terminal group is defined as the fourth set of fingers, wherein the third set of fingers is offset by a sixth distance relative to the fourth set of fingers on the same side in the front-back direction, and the fifth distance is equal to the sixth distance.

14. The connector assembly according to claim 13, characterized in that: The electronic card has multiple first paths, each first path connecting to a corresponding second finger and the second contact portion of the conductive part. A set of first paths connected to the third group of fingers is defined as the first set of paths, and another set of first paths connected to the fourth group of fingers is defined as the second set of paths. The upper surface of the circuit board has multiple second paths, each second path connecting to a corresponding second contact pad and the second conductive part of the conductive part. A set of second paths connected to the third group of contact pads is defined as the third set of paths, and a set of second paths connected to the fourth group of contact pads is defined as the fourth set of paths. The sum of the length of each first path in the first set of paths, the length of the conductive path between the second contact portion and the second conductive part of each of the third terminal groups, and the length of each second path in the third set of paths is equal to the sum of the length of each first path in the second set of paths, the length of the conductive path between the second contact portion and the second conductive part of each of the fourth terminal groups, and the length of each second path in the fourth set of paths.

15. The connector assembly according to claim 13, characterized in that: The first distance in the front-back direction is smaller than the first finger in the front-back direction, and the second distance in the front-back direction is smaller than the first contact pad in the front-back direction.

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