TWI599124B - Electrical connectors and electrical connectors - Google Patents

Description

Electrical connector and electrical connector combination

The present invention relates to an electrical connector, and more particularly to an electrical connector and an electrical connector combination for transmitting signals at high speed.

In recent years, with the development of digital information technology, the amount of data transmission has been increasing. Since data transmission often requires different interfaces through electrical connectors, the speed and quality of signal transmission of electrical connectors can greatly affect the speed of data transmission. stability.

A conventional electrical connector, for example, Japanese Patent Publication No. Hei 5-7829 discloses a docking terminal structure in which contact portions of two terminals that are butted to each other are in contact with a fixing portion of the other terminal, and two contacts are formed between the two terminals. Point to increase the stability of the terminal contact. For example, U.S. Patent No. 7,798,852 B2 discloses a laminated electrical connector comprising a plurality of rows of terminal blocks, wherein the ground terminals and the differential signal terminal pairs in each column of the terminal are alternately arranged, wherein the ground terminals of the adjacent terminal columns are poor. The positions of the pair of signal terminals correspond to each other, and the body portion of the ground terminal is wider, such that the width of the body portion of the ground terminal is greater than the width of the pair of differential signal terminals side by side in the body portion to form an independent pair for each pair of differential signals. Ground shield.

In order to further improve the transmission speed of the signal, it is necessary to reduce the crosstalk of the signal transmission, reduce the terminal impedance and strengthen the shielding between the signal terminals. However, existing electrical connectors are still insufficient.

Accordingly, it is an object of the present invention to provide an electrical connector that can improve the transmission speed of signals and the integrity of signals.

Accordingly, another object of the present invention is to provide an electrical connector assembly.

Therefore, in some embodiments, the electrical connector of the present invention comprises an insulating base and a plurality of rows of terminals arranged in the insulating base. Each of the terminal columns includes a plurality of grounding terminals and a plurality of pairs of differential signal terminal pairs arranged in a first direction, wherein the grounding terminal and the differential signal terminal pair are alternately arranged, and the terminal columns are perpendicular to the first direction The second directions are arranged spaced apart from each other. Each of the ground terminals has a body portion and two elastic contact portions extending from the body portion at a distance from each other. Each pair of differential signal terminal pairs is composed of two signal terminals. The adjacent sides when the two signal terminals of each pair of differential signal terminal pairs are arranged side by side are the opposite inner sides of the respective signal terminals, and the opposite sides on the opposite inner side are opposite outer sides. And each signal terminal has a body portion and an elastic contact portion extending from the body portion, and the total width of the two body portions of each pair of differential signal terminal pairs in the first direction is smaller than the body portion of each ground terminal The width in the first direction, on the adjacent terminal columns, the orthographic projection of the two body portions of each pair of differential signal terminal pairs in the second direction is within the coverage of the width of the body portion of the corresponding ground terminal; The total width of the two elastic contact portions of the pair of differential signal terminals in the first direction is smaller than the overall width of the two elastic contact portions of each of the ground terminals in the first direction, on each adjacent terminal column, each pair The orthographic projections of the two resilient contact portions of the pair of differential signal terminals in the second direction are within the coverage of the width of the two resilient contacts of the corresponding ground terminal.

In some embodiments, each of the ground terminals further has two tail portions extending from the body portion at intervals from each other, and the two tail portions and the two elastic contact portions respectively extend from opposite sides of the body portion thereof, each pair Each signal terminal of the pair of differential signal terminals further has a tail portion extending from the body portion thereof, and the tail portion and the elastic contact portion of each signal terminal respectively extend from opposite sides of the body portion thereof, and two pairs of each pair of differential signal terminals The overall width of the tail in the first direction is less than the overall width of the two tail portions of each ground terminal in the first direction, and on the adjacent terminal columns, the two tails of each pair of differential signal terminals are at the second The orthographic projection in the direction is within the overall width of the two tails of the corresponding ground terminal.

In some embodiments, the centerline of the resilient contact portion of each of the pair of differential signal terminal pairs is offset from the centerline of the body portion toward the opposite inner side thereof.

In some embodiments, the body portion of the ground terminal of each terminal row partially overlaps the orthographic projection of the body portion of the ground terminal of the adjacent terminal column in the second direction.

In some embodiments, the centerline between each pair of differential signal terminals is aligned with the centerline of the corresponding ground terminal of the adjacent terminal column in the second direction.

In some embodiments, the tail portions of the ground terminals of the terminal columns and the tail portions of the differential signal terminal pairs are bent in the same direction.

In some implementations, the body portion of each of the pair of signal terminals of the pair of differential signal terminals has a fixed section adjacent to the tail portion and respectively forming a plurality of holding bumps that interfere with the insulating seat body, and a a necking section adjacent to the fixed section and having a smaller width than the fixed section.

In some embodiments, the body portion of each of the signal terminals is formed by at least an outer side recessed to form the necked portion.

In some embodiments, the body portions of the signal terminals of each pair of differential signal terminal pairs are recessed from opposite sides thereof to form the necking portion, and the elastic contact portions of the two signal terminals are kept on the opposite sides from the body portion. Roughly the same spacing.

In some implementations, the body portion of each of the grounding terminals has a fixed section adjacent to the tail portions and each of which forms a plurality of holding bumps that interfere with the insulating base body, and an adjacent one of the fixed segments A necked section having a width that is smaller than the fixed section.

In some embodiments, the necking section of each of the grounding terminals is relatively retracted by two sides of the body portion, and the necking section of each of the signal terminals is relatively retracted by two sides of the body portion thereof.

In some embodiments, the insulating base has a bottom wall having a first side and a second side parallel to the first direction and opposite ends, the insulating base further having a plurality of parallel sides An elongate ridge extending from the bottom wall and extending between the first side and the second side and extending along the first direction, the bottom wall and the ribs jointly defining a plurality of insertions a slot, and the ribs and the slots are alternately arranged along the second direction, the insulating base further having a plurality of ridges disposed on the wall surfaces of the adjacent slots respectively accommodating the ground terminals The ground terminal slot and the plurality of signal terminal slots respectively accommodating the signal terminals.

In some embodiments, the insulating base further has a plurality of recessed relief portions respectively corresponding to the elastic contact portions, and each of the two recessed relief portions corresponding to each pair of the differential signal terminal pairs is corresponding to each of the signal terminals. A portion of the resilient contact portion near the end is in communication.

In some embodiments, the body portion of each pair of signal terminals of each pair of differential signal terminals has a stopper that is biased against the elastic contact portion and protrudes from the opposite side thereof, and the insulating seat is corresponding to each of the signal terminal slots. A slit-shaped thin groove portion is formed in the region to engage the corresponding stopper so that the body portion of each signal terminal does not move in the second direction.

In some embodiments, the insulating base further has two positioning grooves adjacent to the first side and at opposite ends in the first direction, a protrusion protruding from the bottom wall and adjacent to the second side The first direction extends into an elongated side wall, and two positioning keys protruding from the bottom wall and extending in an L shape from opposite ends of the side wall, the two positioning keys being adapted for electrical connection with another identical structure The two positioning slots of the device are phased.

Therefore, in some embodiments, the electrical connector assembly of the present invention comprises two electrical connectors having the same configuration and abutting each other, and each of the electrical connectors includes an insulating base and a plurality of rows disposed on the insulating base. Terminal column. Each of the terminal columns includes a plurality of grounding terminals and a plurality of pairs of differential signal terminal pairs arranged in a first direction, wherein the grounding terminal and the differential signal terminal pair are alternately arranged, and the terminal columns are perpendicular to the first direction The second directions are arranged spaced apart from each other. Each of the ground terminals has a body portion and two elastic contact portions extending from the body portion at a distance from each other. Each pair of differential signal terminal pairs is composed of two signal terminals. The adjacent sides when the two signal terminals of each pair of differential signal terminal pairs are arranged side by side are the opposite inner sides of the respective signal terminals, and the opposite sides on the opposite inner side are opposite outer sides. And each signal terminal has a body portion and an elastic contact portion extending from the body portion, and the total width of the two body portions of each pair of differential signal terminal pairs in the first direction is smaller than the body portion of each ground terminal The width in the first direction is on the adjacent terminal array, and the orthographic projection of the two body portions of each pair of differential signal terminal pairs in the second direction is within the coverage of the width of the body portion of the corresponding ground terminal. The total width of the two elastic contact portions of each pair of differential signal terminal pairs in the first direction is smaller than the overall width of the two elastic contact portions of each ground terminal in the first direction, on the adjacent terminal columns, each The orthographic projection of the two resilient contact portions of the pair of differential signal terminals in the second direction is within the coverage of the width of the two resilient contacts of the corresponding ground terminal.

In some implementations, when the two electrical connectors are docked, the mutually grounded ground terminals are butted against each other by the two elastic contact portions, and the opposite elastic contact portions form two contact points, and the mutually connected signal terminals are elastically contacted. Opposite and form two contact points.

In some embodiments, each of the ground terminals of each electrical connector further has two tail portions extending from the body portion thereof at a distance from each other, and the two tail portions and the two elastic contact portions are respectively opposite to the body portion thereof Extending on both sides, each signal terminal of each pair of differential signal terminal pairs further has a tail portion extending from the body portion thereof, and the tail portion and the elastic contact portion of each signal terminal respectively extend from opposite sides of the body portion thereof, each pair being poor The overall width of the two tail portions of the pair of signal terminals in the first direction is smaller than the overall width of the two tail portions of each of the ground terminals in the first direction. On the adjacent terminal columns, each pair of differential signal terminal pairs The orthographic projections of the two tails in the second direction are within the overall width coverage of the two tail portions of the corresponding ground terminal.

In some embodiments, the centerline of the resilient contact portion of each of the pair of differential signal terminal pairs is offset from the centerline of the body portion toward the opposite inner side thereof.

In some embodiments, the body portion of the ground terminal of each terminal row partially overlaps the orthographic projection of the body portion of the ground terminal of the adjacent terminal column in the second direction.

In some embodiments, the centerline between each pair of differential signal terminals is aligned with the centerline of the corresponding ground terminal of the adjacent terminal column in the second direction.

In some embodiments, the tail of the ground terminal of the terminal strip of each electrical connector and the tail of the pair of differential signal terminals are bent in the same direction.

In some embodiments, each of the signal terminals of each pair of differential signal terminal pairs of each electrical connector has a holding bump adjacent to the tail portion and two sides respectively forming interference with the insulating housing. a fixed section, and a necked section adjacent to the fixed section and having a smaller width than the fixed section.

In some embodiments, the body portion of each of the signal terminals is formed by at least an outer side recessed to form the necked portion.

In some embodiments, the body portions of the signal terminals of each pair of differential signal terminal pairs are recessed from opposite sides thereof to form the necking portion, and the elastic contact portions of the two signal terminals are kept on the opposite sides from the body portion. Roughly the same spacing

In some embodiments, the body portion of each of the grounding terminals of each of the electrical connectors has a fixed section adjacent to the tail portions and each of which forms a plurality of holding bumps that interfere with the insulating base body, and a a necking section adjacent to the fixed section and having a smaller width than the fixed section.

In some embodiments, the necking section of each of the grounding terminals is relatively retracted by two sides of the body portion, and the necking section of each of the signal terminals is relatively retracted by two sides of the body portion thereof.

In some embodiments, the insulating base of each electrical connector has a bottom wall having a first side and a second side parallel to the first direction and opposite ends, the insulating seat And a plurality of ribs protruding from the bottom wall and spaced apart from each other and extending between the first side and the second side and extending along the first direction, the bottom wall and the convex The strips jointly define a plurality of slots, and the ribs and the slots are alternately arranged along the second direction, and the insulating base further has a plurality of respectively disposed on the wall surfaces of the ribs on the adjacent slots The ground terminal slot of the grounding terminal and the plurality of signal terminal slots respectively accommodating the signal terminals are disposed.

In some embodiments, the insulating base of each electrical connector further has a plurality of recessed relief portions respectively corresponding to the elastic contact portions, and each of the two recessed relief portions corresponding to each pair of differential signal terminal pairs A portion of the elastic contact portion corresponding to each of the signal terminals near the end is in phase communication.

In some embodiments, the adjacent sides of the two signal terminals defining each pair of differential signal terminal pairs are the opposite inner sides of the respective signal terminals, and the opposite sides on the opposite inner side are opposite outer sides, each pair of differential signal terminals. The main body portion of each of the pair of signal terminals has a stopper which is biased against the elastic contact portion and protrudes from the opposite side thereof, and the insulating base body is formed with a slit-shaped slot portion in the region corresponding to each of the signal terminal slots. The corresponding stopper is disposed such that the body portion of each signal terminal does not move in the second direction.

In some embodiments, the insulating base of each electrical connector further has two positioning slots adjacent to the first side and located at opposite ends in the first direction, and a protruding and adjacent by the bottom wall The second side extends along the first direction as an elongated side wall, and two positioning keys protruding from the bottom wall and respectively extending from L-shaped ends of the side wall, the two positioning keys are used for The two positioning slots of an electrical connector are phase-locked.

In some embodiments, the two electrical connectors are Mezzanine connectors.

Thus, in some embodiments of the present invention, an insulative housing and a plurality of rows are disposed in a terminal row of the insulative housing. Each of the terminal columns includes a plurality of grounding terminals and a plurality of pairs of differential signal terminal pairs arranged in a first direction, wherein the grounding terminal and the differential signal terminal pair are alternately arranged. Each ground terminal has two tail portions spaced apart from each other, each signal terminal of each pair of differential signal terminal pairs has a tail portion, and the total width of the two tail portions of each pair of differential signal terminal pairs in the first direction is less than The overall width of the two tail portions of a ground terminal in the first direction. The terminal columns are arranged at a distance from each other along a second direction perpendicular to the first direction, and the terminals are arranged in such a manner that one of the terminal columns is a ground terminal, a differential signal terminal pair, and a ground terminal. Arranging such that the two tail portions of the ground terminal, the tail portions of the two signal terminals, and the two tail portions of the ground terminal are alternately arranged along the first direction, and the terminal column adjacent thereto is a pair of differential signal terminals, one The grounding terminal and the differential signal terminal are alternately arranged, and the tail portions of the two signal terminals, the two tail portions of the grounding terminal, and the tail portions of the two signal terminals are alternately arranged along the first direction, and each terminal column is arranged The differential signal terminal corresponds to a position of the ground terminal of the adjacent terminal column in the second direction, so that the orthographic projection of the two tail portions of each pair of the differential signal terminal pair in the second direction is located at the corresponding ground terminal The overall width of the two tails is covered.

The invention has the following effects: the invention can form a more complete and comprehensive shielding effect on each differential signal terminal pair by the design of the grounding terminal and the signal terminal structure and the arrangement of the terminals, so as to reduce crosstalk interference and increase The transmission speed of the signal. Moreover, the present invention can reduce the impedance of the terminal and strengthen the coupling between the pairs of differential signal terminals to improve the integrity of the signal.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 to FIG. 3, a first embodiment of the electrical connector assembly of the present invention comprises two electrical connectors 100 having the same configuration and abutting each other. Each electrical connector 100 includes an insulating base 1 and a plurality of columns. The terminal row T of the insulating base 1 is disposed.

Referring to FIG. 3 to FIG. 5, the insulating base 1 of each electrical connector 100 has a bottom wall 11 having a first side 111 and a second parallel to a first direction D1 and opposite ends. Side 112. The insulating base 1 further has a plurality of convex portions protruding from the bottom wall 11 and spaced apart from each other and extending between the first side 111 and the second side 112 and extending along the first direction D1. The strip 14 defines the plurality of slots 15 together with the ribs 14, and the ribs 14 and the slots 15 are alternately arranged in a second direction D2 perpendicular to the first direction D1.

Each terminal row T includes a plurality of grounding terminals 2 and a plurality of pairs of differential signal terminal pairs 3 and is arranged along the first direction D1. Each pair of differential signal terminal pairs 3 is composed of two signal terminals 4, and wherein the grounding terminal 2 is The differential signal terminal pair 3 is alternately arranged. A row of terminal rows T are provided on the wall surfaces of the adjacent strips 15 of the ribs 14, and the terminal rows T are arranged at intervals in the second direction D2.

Referring to FIGS. 6-9, each of the ground terminals 2 has a body portion 21, two elastic contact portions 22 extending from the body portion 21 at intervals, and two spaced apart from each other by the body portion 21. The tail portion 23, and the two tail portions 23 and the two elastic contact portions 22 respectively extend from opposite sides of the body portion 21. The elastic contact portion 22 extends upward from the body portion 21 as shown in the drawing direction, and the tail portion 23 extends downward from the body portion 21. The main body portion 21 has a fixing portion 211 adjacent to the tail portions 23 and a plurality of holding protrusions 211a respectively interfering with the insulating base body 1 on the two sides, and a fixing portion 211 adjacent to the fixing portion 211 and having a width smaller than the fixed portion 211 The narrowed necked section 212. That is, the necked section 212 is above the fixed section 211 and the fixed section 211 is between the necked section 212 and the tail section 23. In the present embodiment, the necked portion 212 of the grounding terminal 2 is formed by the two sides of the body portion 21 being relatively retracted. Each of the signal terminals 4 has a body portion 41, an elastic contact portion 42 extending from the body portion 41, and a tail portion 43 extending from the body portion 41, and the tail portion 43 and the elastic contact portion 42 are respectively formed by the body portion The opposite sides of 41 extend. The main body portion 41 of each of the signal terminals 4 has a fixing portion 411 adjacent to the tail portion 43 and a plurality of holding protrusions 411a respectively interfering with the insulating base body 1 on the two sides, and a width adjacent to the fixing portion 411 The necked section 412 is smaller than the fixed section 411. Similarly, the elastic contact portion 42 of the signal terminal 4 extends upward from the body portion 41, and the tail portion 43 extends downward from the body portion 41. The necked section 412 is above the fixed section 411 and the fixed section 411 is between the necked section 412 and the tail 43. The adjacent side when the two signal terminals 4 of each pair of differential signal terminal pairs 3 are arranged side by side is the opposite inner side of each signal terminal 4 and the opposite side on the opposite inner side is the opposite outer side. In this embodiment, each pair of differentials The body portion 41 of each signal terminal 4 of the signal terminal pair 3 is recessed from the opposite outer side to form the necked portion 412, and the elastic contact portion 42 of the two signal terminals 4 and the body portion 41 maintain substantially the same spacing on the opposite sides. . Since the main body portion 21 of the grounding terminal 2 is formed with the holding bumps 211a on both sides of the fixing portion 211, the width of the fixing portion 211 is larger, thereby increasing the impedance, and the necking portion 212 is reduced in width to reduce the impedance. This balances the increased impedance of the segment 211. Similarly, since the main body portion 41 of the signal terminal 4 is formed with the holding bumps 411a on both sides of the fixing portion 411, the width of the fixing portion 411 is large, thereby increasing the impedance, and the necking portion 412 is reduced in width to reduce the width. The impedance, thereby balancing the increased impedance of the fixed segment 411.

The insulating base 1 further includes a plurality of ground terminal slots 16 respectively disposed on the wall surfaces of the adjacent slots 15 for receiving the ground terminals 2, and a plurality of the signal terminals 4 respectively. The signal terminal slot 17 and the plurality of positions respectively correspond to the recessed relief portions 18 of the elastic contact portions 22, 42, and each of the two recessed relief portions 18 corresponding to each pair of the differential signal terminal pairs 3 are corresponding to the respective signal terminals 4. A portion of the resilient contact portion 42 near the end is in communication. That is, the height of the spacer rib 181 between the two recessed relief portions 18 corresponding to each pair of differential signal terminal pairs 3 is lower than the height of the elastic contact portion 42 of the signal terminal 4, so that each pair of differential signal terminal pairs 3 The two elastic contact portions 42 are close to the end without the barrier of the spacer ribs 181, and the coupling between the differential signal terminal pairs 3 can be increased to improve signal integrity. When the ground terminal 2 is assembled to the ground terminal slot 16, the ground terminal 2 is placed from the bottom to the ground terminal slot 16 from the bottom wall 11 side, and the holding protrusion 211a of the grounding terminal 2 and the grounding terminal slot 16 are defined. The groove walls interfere to fix the ground terminal 2, and one side of the body portion 21 of the ground terminal 2 abuts against the surface of the groove wall facing the slot 15. Similarly, when the signal terminal 4 is assembled in the signal terminal slot 17, the signal terminal 4 is placed from the bottom to the signal terminal slot 17 from the bottom to the bottom, and the signal terminal 4 is fixed by the signal terminal 4 and the signal terminal is defined. The groove walls of the groove 17 interfere with each other, and the signal terminal 4 is fixed, and a side surface of the body portion 41 of the signal terminal 4 abuts against the surface of the groove wall facing the slot 15.

In the present embodiment, the tail portion 23 of the ground terminal 2 is bent at a right angle from the bottom end of the body portion 21 and exposed outside the bottom wall 11 for soldering the solder balls 5 (see Figs. 1, 17, and 18). To solder to a circuit board 6 (see Figure 1). Similarly, the tail portion 43 of the signal terminal 4 is bent at a right angle from the bottom end of the body portion 41 and exposed outside the bottom wall 11 for soldering the solder balls 5. Referring to FIG. 10 and FIG. 17, in the present embodiment, the tail portion 23 of the ground terminal 2 of the terminal row T and the tail portion 43 of the differential signal terminal pair 3 are bent in the same direction. In a variant embodiment, the tails may be of other constructions, such as pin-eye crimping feet, through-hole soldering feet, and surface soldering pins.

Referring to FIG. 11 to FIG. 13 , in the embodiment, the position of the differential signal terminal pair 3 of each terminal row T corresponding to the ground terminal 2 of the adjacent terminal column T in the second direction D2; the arrangement of the terminals The method is that one of the terminal columns T is alternately arranged with one grounding terminal 2, one differential signal terminal pair 3, and one grounding terminal 2, and the two elastic contact portions 22 and the two signal terminals 4 of the grounding terminal 2 are arranged. The elastic contact portion 42, the two elastic contact portions 22 of the ground terminal 2 are alternately arranged along the first direction D1, the two tail portions 23 of the ground terminal 2, the tail portions 43 of the two signal terminals 4, and the two tail portions of the ground terminal 2 23... The first direction D1 is alternately arranged, and the corresponding ground signal G and the corresponding differential signal S are arranged in the manner of G, G, S, S, G, G, . The adjacent terminal row T is alternately arranged by a differential signal terminal pair 3, a ground terminal 2, a pair of differential signal terminal pairs 3, and the elastic contact portion 42 and the ground terminal of the two signal terminals 4. The two elastic contact portions 22 of the two, the elastic contact portions 42 of the two signal terminals 4 are alternately arranged along the first direction D1, the tail portions 43 of the two signal terminals 4, the two tail portions 23 of the ground terminal 2, and two signals The tail portions 43 of the terminals 4 are alternately arranged along the first direction D1, and the corresponding ground signal G and the corresponding differential signal S are arranged in the manner of S, S, G, G, S, S, .

In this embodiment, the overall width HB2 of the two body portions 41 of each pair of differential signal terminal pairs 3 in the first direction D1 is smaller than the width HB1 of the body portion 21 of each of the ground terminals 2 in the first direction D1. The overall width HB2 of the two body portions 41 is the distance between the opposite sides of the two body portions 41, and includes the spacing between the two body portions 41. On the adjacent terminal columns T, each pair of differential signal terminal pairs 3 The orthographic projection of the two body portions 41 in the second direction D2 is within the coverage of the width of the body portion 21 of the corresponding ground terminal 2. The overall width HC2 of the two elastic contact portions 42 of each pair of differential signal terminal pairs 3 in the first direction D1 is smaller than the overall width HC1 of the two elastic contact portions 22 of each ground terminal 2 in the first direction D1, The overall width HC2 of the two elastic contact portions 42 is the distance between the opposite ends of the two elastic contact portions 42 and includes the spacing between the two elastic contact portions 42. The overall width HC1 of the two elastic contact portions 22 is two elastic contacts. The distance between the opposite portions 22 of the portion 22 includes the spacing between the two resilient contact portions 22, and in the adjacent terminal arrays T, the two resilient contact portions 42 of each pair of differential signal terminal pairs 3 are in the second direction D2. The orthographic projection is located within the width of the two resilient contact portions 22 of the corresponding ground terminal 2. Moreover, the overall width HT2 of the two tail portions 43 of each pair of differential signal terminal pairs 3 in the first direction D1 is smaller than the overall width HT1 of the two tail portions 23 of each ground terminal 2 in the first direction D1, and likewise, two The overall width HT2 of the tail portion 43 is the distance between the opposite ends of the two tail portions 43 and includes the spacing between the two tail portions 43. The overall width HT1 of the two tail portions 23 is the distance between the opposite ends of the two tail portions 23, including the two tail portions 23. Between the adjacent terminal arrays T, the orthographic projections of the two tail portions 43 of each pair of differential signal terminal pairs 3 in the second direction D2 are within the width of the two tail portions 23 of the corresponding ground terminal 2 . Thus, the orthographic projection of the width of each pair of differential signal terminal pairs 3 in the second direction D2 is within the coverage of the width of the corresponding ground terminal 2. In one embodiment, the center line C2 between each pair of differential signal terminal pairs 3 and the center line C1 of the corresponding ground terminal 2 of the adjacent terminal column T are aligned in the second direction D2. In one embodiment, the body portion 21 of the ground terminal 2 of each terminal row T partially overlaps the orthographic projection of the body portion 21 of the ground terminal 2 of the adjacent terminal row T in the second direction D2. Since the width HB1 of the body portion 21 of the ground terminal 2 is large, the distance between each pair of the differential signal terminal pairs 3 in the same column can be increased, and the difference between the adjacent terminal columns T can be increased. The distance of the pair of signal terminals 3 at the diagonal position can thereby suppress crosstalk interference of the differential signal terminal pair 3 between the adjacent terminal columns T in the diagonal direction. The overall width HC1 of the two resilient contact portions 22, the width HB1 of the body portion 21, and the overall width HT1 of the two tail portions 23 by the ground terminal 2 are respectively greater than the overall width HB2 of the two body portions 41 of the pair of differential signal terminals 3. The overall width HC2 of the two elastic contact portions 42 and the overall width HT2 of the two tail portions 43, that is, the width of the entire ground terminal 2 is larger than the width of the entire differential signal terminal pair 3, and the same terminal column T and adjacent terminal columns can be reinforced. A virtual shield between each pair of differential signal terminals between T to reduce crosstalk interference. In addition, most of the differential signal terminal pairs 3 are surrounded by the ground terminal 2 of the same column and the ground terminal 2 of the adjacent column, and the virtual shielding can also be enhanced to reduce crosstalk interference. Furthermore, the arrangement of the ground terminal 2 of the present embodiment and the tail portions 23, 43 of the signal terminal 4 corresponds to the arrangement of the pads (not shown) on the circuit board 6 (see FIG. 1), that is, one of the columns is G, G. , S, S, G, G, ..., the adjacent columns are S, S, G, G, S, S, ..., by which the arrangement can be connected between the tail pads 23, 43 to the pads of the circuit board 6. Enhanced shielding to reduce crosstalk interference. Therefore, by designing the structure of the ground terminal 2 and the signal terminal 4 and the arrangement of the ground terminal 2 and the differential signal terminal pair 3, a more complete and comprehensive shielding effect can be formed on each differential signal terminal pair 3. To reduce crosstalk interference and increase the transmission speed of the signal.

Referring to FIG. 14, in the embodiment, each terminal row T is pre-formed on a strip 7, and each ground terminal 2 and the strip 71 are connected by a first connecting section 72, each pair of differential signal terminals. A pair of third connecting sections 73 are connected between the pair of strips and the strips 71. The two sides of the body portion 21 of each of the grounding terminals 2 are connected to the body portion 41 of the adjacent signal terminals 4 by a third connecting section 74. When the insulating base 1 is to be assembled, the connection between the connecting segments 72, 73, 74 and the grounding terminal 2 and the signal terminal 4 is cut off to place the grounding terminal 2 and the signal terminal 4 respectively into the corresponding ground. The terminal slot 16 and the signal terminal slot 17 (see FIG. 8) facilitate the assembly process of the terminal block T and the insulating base 1.

Referring to FIG. 2, FIG. 4 and FIG. 15, the insulating base 1 of each electrical connector 100 further has two positioning slots 113 adjacent to the first side 111 and opposite ends in the first direction D1. An elongated side wall 13 projecting from the bottom wall 11 and adjacent to the second side 112 and extending along the first direction D1, and two protrusions from the bottom wall 11 and respectively formed by the ends of the side wall 13 An extended positioning key 19 is formed. The two positioning keys 19 are engaged with the two positioning slots 113 of the other electrical connector 100. In this embodiment, the two electrical connectors 100 are mezzanine connectors. By the foregoing structural design, the two electrical connectors 100 can be prevented from being mis-plugged during docking, and the terminals that are mutually butted can be accurately aligned. Bit.

Referring to FIG. 16 to FIG. 18, when the two electrical connectors 100 are docked, the ribs 14 of one of the electrical connectors 100 are correspondingly inserted into the slots 15 in the other electrical connector 100, so that the two electrical connectors 100 are connected. The corresponding ground terminal 2 and the corresponding signal terminal 4 can be opposite each other. Moreover, the two elastic contact portions 22 of the ground terminal 2 that are butted against each other are butted together, and the opposite elastic contact portions 22 form two contact points, and the two sets of opposite elastic contact portions 22 form four contact points. The signal terminals 4 that are butted against each other are opposed to each other by the elastic contact portions 42 and form two contact points. Specifically, in the present embodiment, the elastic contact portion 22 of one of the mutually grounded ground terminals 2 is in contact with the body portion 21 of the other ground terminal 2 to form a contact point, and the body portion 21 of the ground terminal 2 is formed. Abutting against the wall of the groove defining the ground terminal groove 16 (see FIG. 8), the elastic contact portion 22 can provide a stable and reliable contact positive force, and there are four contact points between the two opposite ground terminals 2. Thereby, it is ensured that the grounded terminal 2 of the docking can maintain a stable electrical connection. Similarly, in the present embodiment, the elastic contact portion 42 of one of the mutually mated signal terminals 4 is in contact with the body portion 41 of the other signal terminal 4 to form a contact point, and the body portion 41 of the signal terminal 4 is abutted. By virtue of the groove wall defining the signal terminal slot 17 (see FIG. 8), the elastic contact portion 42 can be provided with a stable and reliable contact positive force, and there are two contact points between the two opposite signal terminals 4, This ensures that the docked signal terminals 4 can maintain a stable electrical connection.

Referring to Figures 19 to 21, the second embodiment of the electrical connector assembly of the present invention is substantially identical to the first embodiment, but in the second embodiment, the necked portion 412 of each signal terminal 4 is formed by the body portion 41. The sides are relatively indented. In addition, in the second embodiment, the two recessed relief portions 18 corresponding to each pair of differential signal terminal pairs 3 are not connected, that is, the two recessed relief portions 18 have complete spacer ribs 181 therebetween, but In one embodiment, the two recessed relief portions 18 are partially connected to each other preferably. Furthermore, the recessed relief portion 18 corresponding to the same grounding terminal 2 can also be a wider region to simultaneously correspond to the two resilient contact portions 22 of the grounding terminal 2.

Referring to FIG. 22 to FIG. 25, the third embodiment of the electrical connector assembly of the present invention is substantially the same as the first embodiment, but in the third embodiment, the height of each electrical connector 100 is higher, that is, in the third embodiment. The height of the insulating base 1 is higher than that of the insulating base 1 of the first embodiment, and the lengths of the ground terminal 2 and the signal terminal 4 of the third embodiment are compared with the ground terminal 2 and the signal terminal 4 of the first embodiment. long. In addition, in the third embodiment, the bottom wall 11 of the insulating base 1 is thicker, and the ground terminal slot 16 and the signal terminal slot 17 respectively penetrate the bottom wall 11 and extend to the ribs 14, and the bottom wall 11 corresponds to each ground. A wall of the terminal groove 16 protrudes from the wall surface of the corresponding rib 14 by abutting block 114 to abut against the area of the corresponding elastic contact portion 22 of the body portion 21 of the corresponding ground terminal 2, so that the ground terminal 2 is at the ground terminal. The positioning within the slot 16 is relatively stable and does not move in the second direction D2.

Referring to FIG. 26 to FIG. 28, in the third embodiment, the body portion 41 of each of the signal terminals 4 of each pair of differential signal terminal pairs 3 further has a stopper 413 which is biased against the elastic contact portion 42 and protrudes from the opposite outer side. . Further, the insulating base 1 has a slit-shaped narrow groove portion 115 formed in a region corresponding to each of the signal terminal grooves 17 to chuck the corresponding stopper 413 so that the body portion 41 does not move in the second direction D2. The positioning of the signal terminal 4 in the signal terminal slot 17 is relatively stable. Further, in the third embodiment, the center line C3 of the elastic contact portion 42 of each of the signal terminals 4 of each pair of differential signal terminal pairs 3 is offset toward the inner side thereof from the center line C4 of the body portion 41 thereof.

Referring to FIG. 24 to FIG. 27, in the third embodiment, as in the first embodiment, the height of the spacer rib 181 between the two recessed relief portions 18 corresponding to each pair of differential signal terminal pairs 3 is lower than the elastic contact. The height of the portion 42 is such that the two elastic contact portions 42 of each pair of differential signal terminal pairs 3 are not blocked by the spacing ribs 181 between the ends, and the stops of the two signal terminals 4 of each pair of differential signal terminal pairs 3 413 are respectively located on opposite sides of the two signal terminals 4, and the center line C3 of the elastic contact portion 42 of the two signal terminals 4 is offset from the center line C4 of the main body portion 41 to the opposite inner side, so that the two signal terminals 4 can be compared with each other. Close to, that is, reduce the distance between each other, can further increase the coupling between the differential signal terminal pair 3 to improve signal integrity. In addition, in the third embodiment, the necking sections 412 of the signal terminals 4 are relatively contracted by the two sides of the body portion 41, and are also used for adjusting the impedance.

Referring to FIG. 29 and FIG. 30, in the third embodiment, when the two electrical connectors 100 are docked, the mating relationship of the insulating base 1 and the mating relationship between the terminals 2, 4 are the same as in the first embodiment. Repeat again.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

100‧‧‧Electrical connector
1‧‧‧Insulated body
11‧‧‧ bottom wall
111‧‧‧ first side
112‧‧‧ second side
113‧‧‧ positioning slot
114‧‧‧
115‧‧‧Slots
13‧‧‧ side wall
14‧‧ ‧ ribs
15‧‧‧Slot
16‧‧‧Gear terminal slot
17‧‧‧ Signal terminal slot
18‧‧‧ recession avoidance department
181‧‧‧ spaced ribs
19‧‧‧Location Keys
2‧‧‧ Grounding terminal
21‧‧‧ Body Department
211‧‧‧ fixed section
211a‧‧‧ holding bumps
212‧‧‧neck section
22‧‧‧Flexible contact
23‧‧‧ tail
3‧‧‧Differential signal terminal pair
4‧‧‧ Signal Terminal
41‧‧‧ Body Department
411‧‧‧ fixed section
411a‧‧‧ holding bumps
412‧‧‧neck section
413‧‧ ‧block
42‧‧‧Flexible contact
43‧‧‧ tail
5‧‧‧ solder balls
6‧‧‧Circuit board
7‧‧‧Material
71‧‧‧With body
72‧‧‧First connection segment
73‧‧‧Second connection
74‧‧‧ third connection
G‧‧‧ Grounding signal
S‧‧‧Differential signal
T‧‧‧ terminal column
D1‧‧‧ first direction
D2‧‧‧ second direction
C1‧‧‧ center line
C2‧‧‧ center line
C3‧‧‧ center line
C4‧‧‧ center line
HB1‧‧‧Width
HB2‧‧‧ overall width
HC1‧‧‧ overall width
HC2‧‧‧ overall width
HT1‧‧‧ overall width
HT2‧‧‧ overall width

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: Figure 1 is a side view of a first embodiment of the electrical connector assembly of the present invention; Figure 3 is a perspective view of one of the electrical connectors of the first embodiment; Figure 4 is a plan view of the electrical connector of the first embodiment; Figure 5 is a partial view of the electrical connector of Figure 4 Figure 6 is a perspective view of the electrical connector of the first embodiment; Figure 7 is an enlarged view of a partial area of Figure 6; Figure 8 is an exploded perspective view similar to Figure 7; Figure 9 is the front view of Figure 8. Figure 10 is a partial perspective view of the electrical connector of the first embodiment as viewed from the bottom side; Figure 11 is a perspective view of the partial terminal block of the first embodiment, wherein the insulating housing is not shown; Figure 11 is a plan view of Figure 11; Figure 14 is a bottom plan view showing the terminal row of the first embodiment after being formed, connected to a strip before assembly; Figure 15 is the first A perspective cross-sectional view of the combined state of the two electrical connectors of the embodiment; FIG. 16 is 1 is a cross-sectional view of the assembled state of the two electrical connectors of the first embodiment; FIG. 17 is another perspective sectional view of the assembled state of the two electrical connectors of the first embodiment; FIG. 18 is an enlarged view of a partial area of FIG. Figure 20 is a perspective exploded view similar to Figure 19; Figure 21 is a front elevational view of the terminal portion of Figure 20; Figure 22 is a front view of the terminal portion of Figure 20; Figure 3 is a perspective exploded view of the third embodiment of the connector assembly; Figure 23 is an exploded perspective view of one of the electrical connectors of the third embodiment; Figure 25 is a perspective view of a third embodiment of the connector assembly; Figure 26 is a front elevational view of the terminal portion of Figure 25; Figure 27 is an enlarged view of a differential signal terminal pair of Figure 26; Figure 28 is another perspective view of Figure 24; Figure 29 is a perspective cross-sectional view showing the assembled state of the two electrical connectors of the third embodiment; and Figure 30 is an enlarged view of a partial area of Figure 29 .

2‧‧‧ Grounding terminal

21‧‧‧ Body Department

22‧‧‧Flexible contact

23‧‧‧ tail

3‧‧‧Differential signal terminal pair

4‧‧‧ Signal Terminal

41‧‧‧ Body Department

42‧‧‧Flexible contact

43‧‧‧ tail

T‧‧‧ terminal column

D1‧‧‧ first direction

D2‧‧‧ second direction

C1‧‧‧ center line

C2‧‧‧ center line

HC1‧‧‧ overall width

HC2‧‧‧ overall width

Claims (33)

An electrical connector comprising: an insulating base; and a plurality of rows of terminal blocks disposed on the insulating base, each terminal column comprising a plurality of grounding terminals and pairs of differential signal terminals arranged in a first direction Wherein the ground terminal and the differential signal terminal pair are alternately arranged, and the terminal columns are arranged at a distance from each other in a second direction perpendicular to the first direction; each ground terminal has a body portion and two spaced apart from each other An elastic contact portion extending from the main body portion, each pair of differential signal terminal pairs is composed of two signal terminals, and an adjacent side when two signal terminals of each pair of differential signal terminal pairs are arranged side by side is an opposite inner side of each signal terminal The opposite sides of the opposite inner side are opposite outer sides, and each signal terminal has a body portion and an elastic contact portion extending from the body portion, and the total body portions of each pair of differential signal terminal pairs in the first direction a width smaller than a width of the body portion of each of the ground terminals in the first direction, and an adjacent projection position of the two body portions of each pair of differential signal terminals in the second direction on the adjacent terminal columns Covering the width of the body portion corresponding to the grounding terminal; the total width of the two elastic contact portions of each pair of differential signal terminal pairs in the first direction is smaller than the two elastic contact portions of each grounding terminal in the first direction The overall width of the adjacent terminal arrays, the orthographic projections of the two resilient contact portions of each pair of differential signal terminal pairs in the second direction are within the width of the two resilient contact portions of the corresponding ground terminals. The electrical connector of claim 1, wherein each of the ground terminals further has two tail portions extending from the body portion at intervals from each other, and the two tail portions and the two elastic contact portions are respectively opposite to the body portion thereof Side extension, each signal terminal of each pair of differential signal terminals further has a tail portion extending from the body portion thereof, and the tail portion and the elastic contact portion of each signal terminal respectively extend from opposite sides of the body portion thereof, and each pair is differential The overall width of the two tail portions of the signal terminal pair in the first direction is smaller than the overall width of the two tail portions of each ground terminal in the first direction, and on the adjacent terminal columns, two pairs of each pair of differential signal terminals The orthographic projection of the tail in the second direction is within the overall width coverage of the two tails of the corresponding ground terminal. The electrical connector of claim 2, wherein the center line of the elastic contact portion of each of the pair of differential signal terminal pairs is offset from the center line of the body portion toward the inner side thereof. The electrical connector of claim 2 or 3, wherein the body portion of the ground terminal of each terminal row partially overlaps the orthographic projection of the body portion of the ground terminal of the adjacent terminal column in the second direction. The electrical connector of claim 4, wherein the center line between each pair of differential signal terminal pairs is aligned with the center line of the corresponding ground terminal of the adjacent terminal column in the second direction. The electrical connector of claim 5, wherein the tail portions of the ground terminals of the terminal columns and the tail portions of the pair of differential signal terminals are bent in the same direction. The electrical connector of claim 2 or 3, wherein each of the signal terminals of each pair of differential signal terminals has a holding convex portion adjacent to the tail portion and two sides respectively forming interference with the insulating base body. a fixed section of the block, and a necked section adjacent to the fixed section and having a reduced width compared to the fixed section. The electrical connector of claim 7, wherein the body portion of each of the signal terminals is formed by at least an outer side recessed to form the necked portion. The electrical connector of claim 8, wherein the body portion of each of the pair of differential signal terminal pairs is recessed by the opposite outer side to form the necking section, and the elastic contact portion and the body of the two signal terminals The portions maintain substantially the same spacing on opposite sides. The electrical connector of claim 8, wherein the body portion of each of the grounding terminals has a fixed section adjacent to the tail portions and each of which forms a plurality of holding bumps that interfere with the insulating base body, and a phase a necking section that is adjacent to the fixed section and has a smaller width than the fixed section. The electrical connector of claim 10, wherein the necking section of each of the grounding terminals is relatively retracted by two sides of the body portion, and the necking section of each of the signal terminals is opposite to the sides of the body portion thereof. Indented. The electrical connector of claim 1 or 2 or 3, wherein the insulating base has a bottom wall having a first side and a second side parallel to the first direction and at opposite ends, The insulating base body further has a plurality of ribs protruding from the bottom wall and spaced apart from each other and extending between the first side and the second side and extending in the first direction, the bottom wall and the bottom wall The ridges collectively define a plurality of slots, and the ribs and the slots are alternately arranged along the second direction, and the insulating base further has a plurality of ribs disposed on the wall of the adjacent slot A ground terminal slot for accommodating the ground terminals and a plurality of signal terminal slots respectively accommodating the signal terminals. The electrical connector of claim 12, wherein the insulating base further has a plurality of recessed relief portions respectively corresponding to the elastic contact portions, and each of the two recessed relief portions corresponding to each pair of differential signal terminal pairs is A portion of the elastic contact portion corresponding to each of the signal terminals near the end is in phase communication. The electrical connector of claim 12, wherein the body portion of each of the pair of differential signal terminals has a stopper that is biased against the elastic contact portion and protrudes from the opposite side thereof, the insulator body corresponding to A slit-shaped narrow groove portion is formed in a region of each signal terminal slot to latch a corresponding stopper so that the body portion of each signal terminal does not move in the second direction. The electrical connector of claim 12, wherein the insulating base further has two positioning slots adjacent to the first side and located at opposite ends in the first direction, a protruding from the bottom wall and adjacent to the a second side extending along the first direction as an elongated side wall, and two positioning keys protruding from the bottom wall and extending in an L shape from opposite ends of the side wall, the two positioning keys are adapted to be used with another The two positioning slots of the electrical connector of the same structure are phase-locked. An electrical connector assembly comprising: two electrical connectors having the same configuration and interfacing each other, each electrical connector comprising an insulating base; and a plurality of rows of terminal rows disposed on the insulating base, each terminal column comprising The plurality of grounding terminals and the plurality of pairs of differential signal terminals are arranged in a first direction, wherein the pair of the grounding terminal and the differential signal terminal are alternately arranged, and the terminal columns are in a second direction perpendicular to the first direction Arranged at intervals, each ground terminal has a body portion and two elastic contact portions extending from the body portion at intervals, each pair of differential signal terminal pairs being composed of two signal terminals, defining each pair of differential signals The adjacent sides of the two signal terminals of the pair of terminals are the opposite sides of the signal terminals, and the opposite sides of the opposite sides of the signal terminals are opposite outer sides, and each signal terminal has a body portion and an elastic contact portion extending from the body portion. And the total width of the two body portions of each pair of differential signal terminal pairs in the first direction is smaller than the width of the body portion of each ground terminal in the first direction, at adjacent terminals In the column, the orthographic projections of the two body portions of each pair of differential signal terminal pairs in the second direction are within the width of the body portion of the corresponding ground terminal, and the two elastic contact portions of each pair of differential signal terminal pairs are The overall width in the first direction is smaller than the overall width of the two elastic contact portions of each of the ground terminals in the first direction, and in the adjacent terminal columns, the two elastic contact portions of each pair of differential signal terminal pairs are at the The orthographic projections in the two directions are located within the width of the two elastic contact portions of the corresponding ground terminals. The electrical connector assembly of claim 16, wherein when the two electrical connectors are docked, the mutually grounded ground terminals are butted against each other by the two elastic contact portions, and the opposite elastic contact portions form two contact points, which are mutually butted. The signal terminals are connected to each other with elastic contacts and form two contact points. The electrical connector assembly of claim 17, wherein each of the ground terminals of each of the electrical connectors further has two tail portions extending from the body portion thereof at intervals, and the two tail portions and the two elastic contact portions are respectively Extending from opposite sides of the body portion, each signal terminal of each pair of differential signal terminals has a tail portion extending from the body portion thereof, and the tail portion and the elastic contact portion of each signal terminal are respectively opposite to the body portion Side extension, the overall width of the two tail portions of each pair of differential signal terminal pairs in the first direction is smaller than the overall width of the two tail portions of each ground terminal in the first direction, on each adjacent terminal column, each pair The orthographic projections of the two tail portions of the differential signal terminal pair in the second direction are within the overall width coverage of the two tail portions of the corresponding ground terminal. The electrical connector assembly of claim 18, wherein the centerline of the resilient contact portion of each of the pair of differential signal terminal pairs is offset from the centerline of the body portion toward the opposite inner side thereof. The electrical connector assembly of claim 18 or 19, wherein the body portion of the ground terminal of each terminal row partially overlaps the orthographic projection of the body portion of the ground terminal of the adjacent terminal column in the second direction. The electrical connector assembly of claim 20, wherein the center line between each pair of differential signal terminal pairs is aligned with the center line of the corresponding ground terminal of the adjacent terminal column in the second direction. The electrical connector assembly of claim 21, wherein the tail portions of the ground terminals of the terminal blocks of each of the electrical connectors and the tail portions of the pair of differential signal terminals are bent in the same direction. The electrical connector assembly of claim 18 or 19, wherein each of the signal terminals of each pair of differential signal terminal pairs of each electrical connector has a body portion adjacent to the tail portion thereof and is formed with a plurality of insulations The fixed portion of the retaining bump that interferes with the seat body, and a necked portion that is adjacent to the fixed segment and has a smaller width than the fixed segment. The electrical connector assembly of claim 23, wherein the body portion of each of the signal terminals is formed by at least an outer side recessed to form the necked portion. The electrical connector assembly of claim 24, wherein the body portion of each of the pair of differential signal terminal pairs is recessed by the opposite outer side thereof to form the necked portion, and the elastic contact portions of the two signal terminals are The body portions maintain substantially the same spacing on opposite sides. The electrical connector assembly of claim 24, wherein the body portion of each of the ground terminals of each of the electrical connectors has a plurality of retaining bumps adjacent to the tail portions and two sides respectively forming interference with the insulating base body. a fixed section, and a necked section adjacent to the fixed section and having a smaller width than the fixed section. The electrical connector assembly of claim 26, wherein the necking section of each of the grounding terminals is relatively retracted by two sides of the body portion, and the necking section of each of the signal terminals is formed by both sides of the body portion thereof Relatively indented. The electrical connector assembly of any one of claims 16 to 19, wherein the insulating base of each electrical connector has a bottom wall having a first parallel to the first direction and at opposite ends And a second side, the insulating base further has a plurality of strips protruding parallel to the bottom wall and spaced between the first side and the second side and extending along the first direction a rib, the bottom wall and the ribs jointly define a plurality of slots, and the ribs and the slots are alternately arranged along the second direction, the insulating pedestal further having the ribs A plurality of ground terminal slots respectively accommodating the ground terminals and a plurality of signal terminal slots respectively accommodating the signal terminals are disposed on the wall surfaces of the adjacent slots. The electrical connector assembly of claim 28, wherein the insulating base of each electrical connector further has a plurality of recessed relief portions respectively corresponding to the elastic contact portions, and each of the two corresponding pairs of differential signals The recessed relief portion of the pair of terminals is in communication with a portion of the elastic contact portion corresponding to each of the signal terminals near the end. The electrical connector assembly of claim 28, wherein adjacent sides of the two signal terminals defining each pair of differential signal terminal pairs are opposite inner sides of the respective signal terminals, and opposite sides of the opposite inner side are opposite outer sides, The main body portion of each pair of signal terminals of each pair of differential signal terminals has a stopper that is biased against the elastic contact portion and protrudes from the opposite side thereof, and the insulating base body is formed with a slit type in a region corresponding to each of the signal terminal slots. The thin groove portion is provided with a corresponding stopper so that the body portion of each signal terminal does not move in the second direction. The electrical connector assembly of claim 28, wherein the insulating base of each electrical connector further has two positioning slots adjacent to the first side and located at opposite ends in the first direction, a side wall protruding from the second side and extending along the first direction and having an elongated side wall, and two positioning keys protruding from the bottom wall and extending in an L shape from opposite ends of the side wall, respectively The positioning key is used to engage with the two positioning slots of the other electrical connector. The electrical connector assembly of claim 16, wherein the two electrical connectors are Mezzanine connectors. An electrical connector comprising: an insulating base; and a plurality of rows of terminal blocks disposed on the insulating base, each terminal column comprising a plurality of grounding terminals and pairs of differential signal terminals arranged in a first direction And wherein the ground terminal and the differential signal terminal pair are alternately arranged, each ground terminal has two tail portions spaced apart from each other, each signal terminal of each pair of differential signal terminal pairs has a tail portion, and each pair of differential signal terminal pairs The overall width of the two tail portions in the first direction is smaller than the overall width of the two tail portions of each of the ground terminals in the first direction, and the terminal columns are arranged at a distance from each other along a second direction perpendicular to the first direction And the terminal arrangement manner is that one terminal column is alternately arranged by one grounding terminal, one differential signal terminal pair, one grounding terminal, and two tail portions of the grounding terminal, the tail portions of the two signal terminals, and the grounding terminal The two tails are alternately arranged along the first direction, and the adjacent terminal columns are alternated by a differential signal terminal pair, a ground terminal, and a differential signal terminal pair. Arranging, the tail portions of the two signal terminals, the two tail portions of the ground terminal, the tail portions of the two signal terminals, and the like are alternately arranged along the first direction, and the differential signal terminal pair of each terminal column is adjacent to the terminal column The position of the ground terminal in the second direction corresponds such that the orthographic projection of the two tail portions of each pair of differential signal terminal pairs in the second direction is within the overall width coverage of the two tail portions of the corresponding ground terminal.