CN103928795A - Terminal cluster of electric connector and electric connector - Google Patents

Abstract

A terminal cluster of an electrical connector and an electrical connector, the terminal cluster of the electrical connector comprising: a terminal array area, which is used to be formed on a shell surface and the terminal array area includes a plurality of terminal rows arranged in sequence in a longitudinal direction, wherein each of the terminal rows includes at least one signal transmission unit and at least one grounding unit, and the at least one signal transmission unit and the at least one grounding unit are arranged alternately in a transverse direction; the signal transmission unit and the grounding unit of each of the terminal rows are arranged alternately in a longitudinal direction with the grounding unit and the signal transmission unit of any adjacent terminal row, thereby reducing the crosstalk interference of the terminal itself and the terminal to the outside and at the same time reducing the grounding elements required per unit area and increasing the proportion of the signal transmission terminal, so as to improve the transmission efficiency.

Description

Terminal clusters of electrical connectors and electrical connectors

technical field

The invention relates to a terminal cluster of an electrical connector and an electrical connector, in particular to a terminal cluster and an electrical connector of an electrical connector related to an integrated terminal array and structure.

Background technique

The configuration of the existing electrical connector on its terminal cluster mainly includes two aspects, one is the array arrangement of the electrical contacts at the terminal end and the structure of the terminal body, so as to achieve an electrical connector with good transmission quality and low crosstalk interference , the configuration on its terminal cluster is extremely important.

However, please refer to FIG. 1A and FIG. 1B, which involve most of the appearance of an electrical connector terminal cluster. FIG. 1A shows an existing electrical contact array F, which is a longitudinal Y, The horizontal X is configured in a 7x7 pattern, and includes a plurality of ground terminals GP and signal terminals SP. However, this method uses too many ground terminals GP and relatively few signal terminals SP. If you look at the sub-electrical contact array F1, you can find that there are fewer signal terminals in one unit of terminals, and the ground terminal GP is biased. If not, the effect of reducing crosstalk interference that is acceptable to general users cannot be achieved, so the existing practice often leads to the problem that the size of the electrical connector is too large.

The structure of these ground terminals GP or signal terminals SP itself is shown in Figure 1B, especially for the signal terminal SP, the first terminal 1 and the second terminal 2 are roughly the same style and structure, and both are different from the beginning to the end. The parts are roughly parallel to each other. Therefore, for example, assuming that there is a first crosscutting line C1 that cuts two first crosscutting points (11, 21) at the left ends of the first terminal 1 and the second terminal 2 that are arranged side by side and have the same structure, the two first The relative distance between the crosscutting points (11, 21) is the stitch pitch P; and if there is a second crosscutting line C2, two second crosscutting lines are cut in the middle section of the first terminal 1 and the second terminal 2 respectively. The tangent point (12, 22), and the relative distance between the two second cross-cutting points (12, 22) are basically equal to the pitch P of the stitches. This is the current practice and structural arrangement of the general terminal structure in the issue of terminal clustering.

However, it can be found from the above that even though the electrical contact array F has achieved a certain degree of reduction in crosstalk interference or other external electromagnetic interference (EMI) by virtue of more ground terminals GP at the beginning, the adjacent terminals or the terminals themselves However, there is always the interference problem of cross-talk, especially when the electrical connector is used for high-speed data transmission (such as 3Gbps), in order to transmit a large amount of data in a short time, the electrical signal requires a higher bandwidth, so The operating frequency of electrical signals is also extremely high, possibly between 3GHz and 5GHz or higher. As the operating frequency increases, the crosstalk generated is more serious, which immediately affects the integrity of data transmission or generates bit errors.

Therefore, if it is impossible to achieve perfect shielding between adjacent terminals to reduce crosstalk, the operating frequency of the electrical signal has to be reduced instead, resulting in a bottleneck in the data transmission rate that cannot be greatly increased. In addition, even if the shielding between adjacent terminals can be effectively achieved, the size and weight of the electrical connector cannot be effectively reduced due to the increase of shielding elements or grounding elements. This is obviously contrary to the current miniaturization of electronic components trend, but also increase the manufacturing cost in vain.

Therefore, the inventor of the present invention is aware of the above-mentioned problems, so he devoted himself to research and combined with the application of theories, and finally proposed an invention with a reasonable design and effectively improved the above-mentioned deficiencies.

Contents of the invention

The main purpose of the present invention is to provide a terminal cluster of an electrical connector, which can improve the common shortcomings of conventional electrical connectors such as poor transmission efficiency and crosstalk interference by integrating the configuration of the terminal cluster. In addition to reducing interference and improving signal transmission quality, the efficiency of signal transmission can be optimized overall by eliminating redundant ground barriers and increasing electrical contacts per unit area.

To achieve the above purpose, the present invention provides a terminal cluster of an electrical connector, which is formed on a shell surface and used to reduce crosstalk interference from the terminals of the electrical connector itself and the terminals of the electrical connector to the outside, It includes: a terminal array area, which includes a plurality of terminal rows arranged side by side in longitudinal order, wherein each of the terminal rows includes at least one signal transmission unit and at least one grounding unit, and the at least one signal transmission unit and the at least one The grounding units are alternately arranged horizontally; and the signal transmission units and grounding units of each terminal row are respectively vertically and alternately arranged with the grounding units and signal transmission units of any adjacent terminal row.

To achieve the above object, the present invention also provides an electrical connector, which includes the terminal cluster of the electrical connector as described above, and the electrical connector includes: a dielectric in which the signal transmission unit and the grounding unit are arranged The housing, the terminal array area is formed on one side of the dielectric housing.

To sum up, the present invention can effectively improve the problem of poor transmission efficiency and avoid crosstalk interference by integrating terminal clusters in the arrangement structure.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the accompanying drawings are provided for reference and illustration only, and are not intended to limit the present invention.

Description of drawings

FIG. 1A is a schematic diagram of the configuration of the signal terminal and the ground terminal of the existing electrical connector terminal cluster;

FIG. 1B is a terminal schematic diagram of an existing electrical connector terminal cluster;

2A is a schematic perspective view of terminal clusters of the electrical connector of the present invention;

2B is a perspective view of the electrical connector of the present invention;

2C is a schematic diagram of the configuration of the signal transmission unit and the grounding unit of the terminal cluster of the electrical connector of the present invention;

3A is a schematic front view of another embodiment of the electrical connector of the present invention;

3B is a schematic diagram of another embodiment of the configuration of the signal transmission unit and the grounding unit of the terminal cluster of the electrical connector of the present invention;

Fig. 4 is a terminal schematic diagram of a terminal cluster of the electrical connector of the present invention; and

FIG. 5 is a graph of test data for reducing the effect of crosstalk interference when the present invention is used to transmit signal numbers.

Wherein, the reference signs are explained as follows:

10 first terminal group

10' first terminal group

11 first terminal

      111 First contact end

112 first neck

                                                       

    113 first extension

                                         

114 Third neck

  115 The third contact end

11' first terminal

12 first terminal

12' first terminal

13 first terminal

  13' first terminal

14 first terminal

  14' first terminal

15 first terminal

  15' first terminal

20 second terminal group

20'Second Terminal Group

21 second terminal

          211 Second contact end

212 Second neck

                                                                 

        213 Second Extension

                                                       

214 Fourth neck

                                   

21' second terminal

22 second terminal

22' second terminal

23 second terminal

23' second terminal

24 second terminal

24' second terminal

25 second terminal

25' second terminal

                                     

252 Second Neck

      253 Second Extension

                                                         

254 Fourth neck

                               

30 first shell

40 second housing

50 third case

51 through holes

AX symmetry axis

CL terminal cluster

CL' terminal cluster

G ground unit

G1 ground terminal

G2 ground terminal

I dielectric housing

L1 first curve

L2 second curve

N Narrow

S signal transmission unit

S(+) positive differential signal terminal

S(-) negative differential signal terminal

T terminal array area

T' terminal array area

W wide noodles

D1 first spacing

D2 second spacing

D3 third spacing

1 first terminal

11 first crosscutting point

12 second crosscutting point

2 second terminal

21 first crosscutting point

22 second crosscutting point

C1 first crosscutting line

C2 second crosscutting line

F electrical contact array

F1 subarray

GP ground terminal

P pin pitch

SP signal terminal

Detailed ways

Please refer to FIG. 2A, FIG. 2B and FIG. 2C, the present invention provides a terminal cluster CL of an electrical connector, which is used to form on a shell surface (number omitted), and is used to reduce the terminals of the electrical connector. The external crosstalk interference of itself and the terminals of the electrical connector.

The terminal cluster CL is shown in FIG. 2A. In a preferred example, but not limited thereto, it is composed of a first terminal group 10 and a second terminal group 20 arranged side by side. Each terminal group consists of the above There are five first terminals down to the bottom, namely the first terminal (11, 12, 13, 14 and 15) and the second terminal (21, 22, 23, 24 and 25), thus defining a 2x5 terminal group to A terminal array region T is formed. As shown in FIG. 2A and FIG. 2B, the terminal cluster CL can be covered by a dielectric shell I to form an electrical connector. The dielectric shell I can be integrally formed by mold injection, but not in this way. limit. Therefore, in this preferred embodiment, as shown in FIG. 2B , the dielectric housing 1 is exemplified by the non-integrated first housing 30, the second housing 40 and the third housing 50, and the third housing The body 50 also has a plurality of through holes 51 , and the terminal array area T is covered by the third shell 50 , and cooperates with the through holes 51 on any shell surface of the third shell 50 to form an electrical connection interface.

In the terminal array area T, the first terminal 11 and the second terminal 21 are used for illustration, and the rest of the first terminal and the second terminal are analogized. The first terminal 11 and the second terminal 21 correspond to the through hole 51 of the third housing 50, and the electrical connection interface formed is a socket interface. If it is a socket interface, it can be a golden finger socket or a socket with a holding function. Recess, but also because the first terminal 11 changes with the form of the end of the second terminal 21, it can be an interface of other specifications, such as a convex plug interface, and if it is a convex plug interface, it can be a golden finger convex plug, Fisheye stitch, or any stitch, etc.

Please refer to FIG. 2A, FIG. 2B and FIG. 2C, the terminal array area T includes a plurality of terminal rows (numbers omitted) arranged side by side according to the vertical axis Y (longitudinal), as shown in FIG. 2C, the horizontal axis X The (horizontal) terminal configuration is 2, and the vertical terminal configuration is 5 in the 2x5 terminal array area T for illustration, but not limited to this configuration. Wherein, each terminal row includes at least one signal transmission unit S and at least one grounding unit G, and the signal transmission unit S and the grounding unit G are alternately arranged laterally in any terminal row. In other words, as shown in FIG. 2C , the configuration of the first terminal row in the terminal array area T is SG. If it is extended and lengthened laterally, the arrangement of the signal transmission unit S and the grounding unit G will be SGSGSGSG..., which are spaced apart from each other. However, the terminal row is not limited to only the signal transmission unit S as the beginning or the end, nor is it limited to the grounding unit G to be the beginning or the end.

In addition, the signal transmission unit S and the grounding unit G of each terminal row are respectively vertically and alternately arranged with the grounding unit G and the signal transmission unit S of any adjacent terminal row. Therefore, in other words, in the terminal array area T, if there is another terminal row parallel to it in the longitudinal direction (upper or lower) of any row of terminal rows that are alternately arranged by signal transmission units S and grounding units G, the original terminal Each signal transmission unit S in a row is also paired with a corresponding grounding unit G in another row that is arranged in a longitudinal terminal row.

Therefore, by analogy, the above arrangement is applicable to the terminal array area T with various row and column sizes such as 2x2, 2x3, 3x2, 3x3, 2x4, 5x2, 5x5, 7x7, etc., so the array size is not limited. Preferably, it can be observed from the above configuration rules that among the above-mentioned multiple terminal rows, the sum of the number of signal transmission units S and the sum of the numbers of grounding units G between any two adjacent terminal rows can be equal . The periphery of the terminal array area T can also be provided with a plurality of peripheral grounding units (figure omitted, label omitted), in order to provide further shielding for the signal transmission unit located around the terminal array area T, for example, in FIG. 2C to serve as a signal transmission For the first terminal 23 of unit S, it can be found that the left side is outside the terminal array area T. At this time, a peripheral grounding unit can be arranged on the first terminal 23 to provide more complete shielding. Similarly, the first The same applies to the terminal 11, the second terminal 22, and the like.

Preferably, a first terminal group 10 and a second terminal group 20 can be defined in a terminal cluster CL, taking the first terminal 11 of the first terminal group 10 and the second terminal 21 of the second terminal group 20 as For example, the first terminal 11 can be used to define a signal transmission unit S, and the second terminal 21 can be used to define a ground unit G. Then the above-mentioned signal transmission unit S can be a single-ended signal transmission terminal, and the above-mentioned grounding unit G can be a ground terminal.

In this way, it can be understood from FIG. 2B and FIG. 2C that both the first terminals (11, 13, 15) and the second terminals (22, 24) used as the signal transmission unit S are single-ended terminals for transmitting single-ended signals. Signal transmission terminal. They are arranged in a zigzag shape (Zigzag) from top to bottom along the vertical axis Y in the terminal array area T. The first terminal (12, 14) and the second terminal (21, 23, 25) both serving as the grounding unit G are all grounding terminals, and in the terminal array area T, the vertical axis Y is approximately right from top to bottom. - Left-right-left-right zigzag arrangement. The zigzag arrangement of the two is substantially in a complementary zigzag arrangement relationship in the terminal array region T.

In addition, if it is directly deduced from Figure 2B and Figure 2C to Figure 3A and Figure 3B, intuitively speaking, the terminal array area T' includes the terminal cluster CL and the terminal cluster CL', so the number of rows and columns of the terminal array area T' becomes 4x5 , and the signal transmission unit S or the ground unit G can also be jointly defined by the first terminal 11 and the second terminal group 21 in the terminal cluster CL. Then the above-mentioned signal transmission unit S can also be a pair of differential signal terminals, including the first terminal 11 and the second terminal 21, in other words, the first terminal 11 and the second terminal 21 can jointly form a pair of differential signal terminals (labels omitted). , the differential signal terminal pair includes a positive differential signal terminal, denoted by S(+), and a negative differential signal terminal, denoted by S(-).

It should be noted here that although the names of the first terminals (11, 13, 15) at different positions in FIG. 3A all belong to the first terminal group 10, and in this embodiment all belong to the signal transmission unit S, but It is not limited to only be used to transmit the same signal. The ground unit G can also be a pair of ground terminals, including the first terminal 11' and the second terminal 21', as shown in the first ground G1 and the second ground G2 in FIG. 3B. Therefore, in a word, as long as the above-mentioned arrangement of the grounding unit G and the signal transmission unit S in the terminal array region T is satisfied, there is no limitation on how many terminals define the grounding unit G or the signal transmission unit S. However, for this embodiment of the differential signal terminal pair and the ground terminal pair, the ground unit G and the signal transmission unit S each need to be defined by two terminals, but the signal transmission unit S and the ground unit G are in the terminal array area. The configuration of T still conforms to the basic spirit and is equivalent to the configuration when only the first terminal 11 defines the signal transmission unit S and only the second terminal 21 defines the grounding unit G (see FIG. 3B ). In addition, it should be mentioned that the 4x5 terminal array area T' can not only be constituted by the terminal cluster CL and the terminal cluster CL'. Through the integration of terminal clusters in the arrangement structure, the above-mentioned problems of poor transmission efficiency and the avoidance of crosstalk interference can be effectively improved.

Please refer to FIG. 2A, FIG. 3A, FIG. 3B and FIG. 4, so preferably, in the terminal cluster CL of the present invention, as shown in FIG. 2A, the paired first terminal 11 and the second terminal 12 are example. The first terminal 11 sequentially includes a first contact end portion 111 extending from the terminal array region T, a first neck portion 112 and a first extension portion 113 from one end thereof; the second terminal 21 includes sequentially from one end thereof Extending from the terminal array area T, the second contact end portion 211 corresponding to the first contact end portion 111 , the second neck portion 212 corresponding to the first neck portion 112 and the second extension portion corresponding to the first extension portion 113 Section 213.

There is a first distance D1 between the first contact end portion 111 and the second contact end portion 211, a second distance D2 between the first extension portion 113 and the second extension portion 213, and the first distance D1 is greater than the second distance D2. . In this way, an electromagnetic coupling effect can be generated between the first extension part 113 and the second extension part 213 that are relatively close to each other, so that the transmitted signal can be better covered, and the problem of external and self-interference can be reduced, so as to The problem of crosstalk interference between terminals can be improved, and the signal transmission quality of the electrical connector can be effectively improved. Moreover, preferably, the first extension portion 113 and the second extension portion 213 each have a wide surface, and the two wide surfaces can face each other.

Preferably, the ratio between the first distance D1 and the second distance D2 can be between 40:7 (the ratio is 5.714) and 40:15 (the ratio is 2.667). Or optimally, the first distance D2 can be 2 mm, and the second distance can be 0.55 mm. Wherein, the first terminal 11 and the second terminal 21 can form a differential signal terminal pair, and the differential signal terminal pair includes a positive differential signal terminal, such as S(+) in Figure 3B, and a negative differential signal terminal, such as S(-) in Fig. 3B is used to transmit a differential signal; or both the first terminal 11 and the second terminal 21 can be a single-ended signal transmission terminal, respectively used to transmit a single-ended signal, of course, with the above The first terminal 11 and the second terminal 21 of the above structure can also be used as a pair of grounding terminals, which will not be repeated here.

Therefore, it can be understood from FIG. 4 that in order to improve the problem of crosstalk interference between the terminals of the terminal cluster CL of the present invention, the structure between the terminals of the signal transmission unit S preferably has its first contact end portion 111 and A structural feature that the first distance D1 between the second contact end portions 211 is greater than the second distance D2 between the first extension portion 113 and the second extension portion 213 . Taking the first terminal 11 as an example, as long as the above characteristics are met, the first neck 112 connecting the first contact end 111 and the first extension 113 is not limited in any specific way or structure. The connection between a contact end portion 111 and the first extension portion 113 is similar to that of the second neck portion 212 .

For easier description, as shown in FIG. 4 , the present invention is described with two symmetrical first terminals 11 and second terminals 21 relative to the axis of symmetry AX in a plan view, and can be analogized to the one shown in FIG. 2A . Other terminals except the first terminal 11 and the second terminal 21 are not limited to this symmetrical structure. Taking the first contact end portion 111 as a starting point, the first neck portion 112 bends inwardly and extends toward the axis of symmetry AX, and is connected to the first extension portion 113, and the second neck portion 212 is symmetrical to the first extension portion 113. The neck portion 112 is also bent inwardly toward the axis of symmetry AX, and then extends to the second extension portion 213 . Therefore, in order to make the first distance D1 larger than the second distance D2, in the manufacture of terminals, the middle section of any one of the terminals is usually punched and pressed to form a direction toward the other terminal or toward the direction of the symmetry axis AX. The first neck 112 and the second neck 212 are bent inward. In this way, the second distance D2 between the first extension portion 113 and the second extension portion 213 at the rear portion of the first neck 112 and the second neck 212 is naturally smaller than the first distance D1.

Preferably, the first terminal 11 can further extend a third neck portion 114 and a third contact end portion 115 sequentially from the first extension portion 113, in other words, the first contact end portion 111 and the third contact end portion 115 are respectively located at two ends of the first terminal 11 .

Similarly, a fourth neck 214 corresponding to the third neck 114 and a fourth contact end corresponding to the third contact end 115 can be further sequentially extended from the second extension 213 of the second terminal 21 215. In this embodiment, both the third contact end portion 115 and the fourth contact end portion 215 are fisheye stitches, but not limited thereto. As the other end of the first terminal 11 and the second terminal 21 of the present invention, the third contact end 115 and the fourth contact end 215 can be electrical contacts, pins, female plugs or convex plugs of any specification and form. However, the most important thing is that the third contact end portion 115 and the fourth contact end portion 215 are also separated from each other by a third distance D3, the third distance D3 must be greater than the second distance D2, the distance between the third distance D3 and the first distance D1 The relative size of is not limited, but preferably, the third distance D3 may be equal to the first distance D1. The individual structures of the third neck 114 and the fourth neck 214 or the structures between them are the same as the above-mentioned examples of the first neck 112 and the second neck 212 , and will not be repeated here.

It should be noted here that the definitions and measurement methods of the above-mentioned first distance D1, second distance D2 and third distance D3 are as follows: taking the first distance D1 as an example, it is based on the central axis of the first contact end portion 111 (as shown in Figure 4, the reference number is omitted), and the distance between the central axis of the second contact end 211 (as shown in Figure 4, the reference number is omitted) is defined and measured accordingly, the second distance D2 and the third distance D3 are also in this way.

Preferably, the present invention takes a terminal cluster suitable for a right-angle adapter in an electrical connector as an example, so the first extension part 113 can also have a first bending part 1131, and the first bending part 1131 is usually used as a A bend close to a right angle. Take Figure 2A as an example, the bending is downward, but it is not limited to this, and it can also be bent upward, toward the direction of going out of the paper of Figure 2A or toward the direction of entering the paper of Figure 2A, and the bending angle is also different. limit. Please return to FIG. 2A , the first bending portion 1131 can be used to guide the direction of the third contact end portion 115, so as to guide the third contact end portion 115 and the first contact end portion 111 respectively. lead to a relative relationship that is perpendicular to each other. And the second extension part 213 also has a second bending part 2131 corresponding to the first bending part 1131, so the driving and guiding of the fourth contact end part 215 by the second bending part 2131 will also make the The respective directions of the third contact end portion 115 and the first contact end portion 111 are guided to be perpendicular to each other. However, no matter how the first bending portion 1131 and the second bending portion 2131 are bent, the final result must comply with the third distance D3 mentioned above being smaller than the second distance D2 of the present invention.

However, the structure of the above-mentioned first bending portion 1131 may become unnecessary if it is not used in a right-angle adapter; The end part 255 can face downward at last, but it extends directly downward from the first extension part 253 from the third neck part 254, and it can be found that although the structural feature of the first bending part 2531 exists, it is not very obvious. .

Please refer to FIG. 5 , the present invention obtained through the above-mentioned technical means is proved by the test data in FIG. 5 , when the first distance D1 is greater than the second distance D2 (FIG. 4), it can indeed effectively reduce the terminal itself or Crosstalk interference between terminals. The vertical axis of Fig. 5 is the noise value of crosstalk interference, and its unit is decibel (dB); the horizontal axis is the electrical signal frequency used, and its unit is kilohertz (GHz); The noise value of crosstalk interference generated during frequency electrical signal transmission. The second curve L2 is the noise value of the crosstalk interference generated by using the existing terminals when transmitting electrical signals of various frequencies. It can be seen from FIG. There are terminals are also small. Therefore, the present invention can effectively reduce the noise value of crosstalk interference, and it should be more helpful in improving the signal-to-noise ratio (Signal-to-noise ratio, Signal/Noise, S/N), especially suitable for grounding terminals Fewer electrical connectors, so it is particularly suitable for electrical connectors with the relative configuration of the terminal array area T as described above.

Referring to FIG. 2B , the present invention also provides an electrical connector, which includes the above-mentioned terminal cluster CL of the electrical connector, and the number of rows and columns of the terminal cluster CL is not limited. The electrical connector includes: a dielectric housing I in which a signal transmission unit S and a grounding unit G are arranged, which can be used to fix each terminal constituting the signal transmission unit S and the grounding unit G, and when the signal transmission unit S When used as a pair of differential signal terminals, the first distance D1, the second distance D2 or the third distance D3 between the extensions of each group of positive differential signal terminals S(+) and negative differential signal terminals S(-) can be fixed respectively. . And the signal transmission unit S and the grounding unit G can of course form a terminal array similar to the terminal array area T (such as: FIG. 2B, FIG. 2C) or the terminal array area T' (such as: FIG. 3B ), and in the electrical connector On either side of the dielectric housing 1, an electrical connection interface is formed.

To sum up, the present invention can effectively improve the above-mentioned problem of poor transmission efficiency and avoid crosstalk interference by integrating terminal clusters in the arrangement structure, and because fewer grounding elements are inherently required, it can reduce The advantages of weight and volume also help in the miniaturization of electrical connectors.

However, the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of patent protection of the present invention, so all equivalent changes made by using the description or drawings of the present invention are all included in the scope of the present invention in the same way. within the scope of rights protection.

Claims (10)

1. A terminal cluster of an electrical connector, which is used to form a shell surface, characterized in that it comprises: A terminal array area, which includes a plurality of terminal rows arranged side by side in longitudinal order, wherein, Each of the terminal rows includes at least one signal transmission unit and at least one grounding unit, and the at least one signal transmission unit and the at least one grounding unit are alternately arranged laterally; and The signal transmission unit and the grounding unit of each terminal row are respectively vertically and alternately arranged with the grounding unit and the signal transmission unit of any adjacent terminal row. 2. The terminal cluster of the electrical connector according to claim 1, characterized in that, among the plurality of terminal rows, the sum of the number of signal transmission units and the number of grounding units between any two adjacent terminal rows The sum is equal. 3. The terminal cluster of an electrical connector as claimed in claim 1, wherein the signal transmission unit is a single-ended signal transmission terminal, and the grounding unit is a ground terminal. 4. The terminal cluster of an electrical connector according to claim 1, wherein the signal transmission unit is a pair of differential signal terminals, the grounding unit is a pair of ground terminals, and the pair of differential signal terminals includes a positive differential signal terminal and a negative differential signal terminal. 5 . The terminal cluster of an electrical connector as claimed in claim 4 , wherein a plurality of peripheral grounding units are arranged around the terminal array area to provide shielding for signal transmission units around the terminal array area. 6 . 6. The terminal cluster of an electrical connector according to claim 1, wherein the signal transmission unit further comprises a pair of first terminals and a second terminal, The first terminal sequentially includes a first contact end portion, a first neck portion and a first extension portion from one end thereof, The second terminal includes a second contact end portion corresponding to the first contact end portion, a second neck portion corresponding to the first neck portion, and a first extension portion corresponding to the first extension portion in order from one end thereof. two extensions, There is a first distance between the first contact end portion and the second contact end portion, a second distance between the first extension portion and the second extension portion, and the first distance is greater than the second distance. 7. The terminal cluster of the electrical connector according to claim 6, wherein the first pitch is 2 mm, and the second pitch is 0.55 mm, wherein the first terminal and the second terminal form a differential A signal terminal pair, the differential signal terminal pair includes a positive differential signal terminal and a negative differential signal terminal; or both the first terminal and the second terminal are single-ended signal transmission terminals. 8. The terminal cluster of the electrical connector according to claim 6, wherein the ratio of the ratio between the first pitch and the second pitch is between 5.714 and 2.667, and the first terminal and the second The terminals form a differential signal terminal pair, the differential signal terminal pair includes a positive differential signal terminal and a negative differential signal terminal; or Both the first terminal and the second terminal are a single stack of signal transmission terminals. 9. The terminal cluster of an electrical connector according to claim 6, wherein the first terminal further extends from the first extension part to a third neck and a third contact end in sequence, the first The two terminals further extend sequentially from the second extension part to a fourth neck corresponding to the third neck and a fourth contact end corresponding to the third contact end, the third contact end and the third contact end There is a third distance between the fourth contact ends, the third distance is greater than the second distance, the first extension part also includes a first bending part, and the second extension part also includes a corresponding to the first The second bending part of the bending part. 10. An electrical connector, characterized in that it comprises a terminal cluster of the electrical connector according to any one of claims 1 to 9, the electrical connector comprising: a signal transmission unit disposed therein and the dielectric casing of the grounding unit, the terminal array area is formed on one side of the dielectric casing.