Electric connector, electric connector combination and terminal module

Abstract

A terminal module comprises a differential signal terminal pair, two grounding terminals and an insulating frame. Each grounding terminal is provided with a plate surface; the insulating frame partially wraps the differential signal terminal pair and the two grounding terminals in an integrated mode. The insulating frame is provided with a surface corresponding to the two plate surfaces of the two grounding terminals, and the surface is provided with two concave sections. At least one part of the position of each sunken section corresponds to the plate surface of the corresponding grounding terminal, each sunken section is of a long structure, and the length direction of each sunken section extends in the length direction of the corresponding grounding terminal. Therefore, the two signal terminals can keep good signal integrity performance during signal transmission, and crosstalk interference between two adjacent differential signal terminal pairs can be reduced.

Description

Technical Field

[0001] The present invention relates to an electric connector, in particular to an electric connector, an electric connector assembly and a terminal module for high-speed signal transmission. Background Art

[0002] Digital data transmission often uses electrical connectors as an interface. The signal transmission speed and quality of electrical connectors affect the speed and stability of data transmission. As data transmission volume increases and signal transmission speeds become faster and faster, maintaining good signal integrity (SI) performance during high-speed signal transmission has become a critical issue. Summary of the Invention

[0003] Therefore, one of the objects of the present invention is to provide a terminal module that can overcome at least one disadvantage of the prior art.

[0004] Therefore, the terminal module of the present invention includes a differential signal terminal pair, two grounding terminals, and an insulating frame.

[0005] The two ground terminals are respectively located outside the differential signal terminal pair. Each ground terminal has a plate surface. The insulating frame is integrally formed to partially cover the differential signal terminal pair and the two ground terminals. The insulating frame has a surface corresponding to the plate surfaces of the two ground terminals, and the surface is provided with two recessed sections. Each recessed section is positioned at least partially corresponding to the plate surface of the corresponding ground terminal. Each recessed section is an elongated structure, and its length extends along a length direction of the corresponding ground terminal.

[0006] In some embodiments, the insulating frame further has a bottom surface connected to the surface, and a top surface connected to the surface and opposite to the bottom surface, and each of the recessed sections extends to at least one of the bottom surface and the top surface.

[0007] In some embodiments, each of the recessed sections extends to the bottom surface and the top surface.

[0008] In some embodiments, the insulating frame further comprises a bottom surface connected to the surface, and a top surface connected to the surface and opposite to the bottom surface, and each of the recessed sections is spaced apart from the bottom surface and the top surface.

[0009] In some embodiments, each of the recessed sections is formed with a recessed hole.

[0010] In some embodiments, the recessed hole is a hollow hole through which the board surface of the corresponding ground terminal is partially exposed.

[0011] In some embodiments, the recessed hole is a blind hole that does not expose the board surface of the corresponding ground terminal.

[0012] In some embodiments, the recessed hole is in the shape of an elongated hole and its length extends along the length direction. The recessed hole has a length taken along the length direction, a width taken along a width direction of the corresponding grounding terminal, and a depth taken along a depth dimension perpendicular to the length direction and the width direction.

[0013] In some embodiments, each of the recessed sections is formed with a first recessed hole and a second recessed hole arranged along the length direction and interconnected. The first recessed hole is a hollow hole for partially exposing the board surface of the corresponding grounding terminal, and the second recessed hole is a blind hole that does not expose the board surface of the corresponding grounding terminal.

[0014] In some embodiments, each of the recessed sections has two inner side surfaces and at least one bridging portion connected between the two inner side surfaces, and each of the recessed sections is formed with at least one first recessed hole located between the two inner side surfaces and at one end of the bridging portion.

[0015] In some embodiments, each of the recessed sections is formed with two first recessed holes respectively located at opposite ends of the bridge portion and arranged along the length direction.

[0016] In some embodiments, the bridging portion is spaced apart from the surface, and each of the recessed sections is further formed with a second recessed hole located between the two inner side surfaces and the bridging portion. The first recessed hole is a hollow hole for partially exposing the board surface of the corresponding grounding terminal, and the second recessed hole is a blind hole connected to the first recessed hole and does not expose the board surface of the corresponding grounding terminal.

[0017] In some embodiments, each of the recessed sections has a plurality of bridging portions spaced apart along the length direction, and each of the recessed sections is formed with a plurality of first recessed holes, each of the first recessed holes being located between two adjacent bridging portions.

[0018] In some embodiments, each of the bridging portions is spaced apart from the surface, and each of the recessed sections is further formed with a plurality of second recessed holes, each of the first recessed holes is a hollow hole for partially exposing the plate surface of the corresponding grounding terminal, and each of the second recessed holes is located between the two inner side surfaces and the corresponding bridging portion, and each of the second recessed holes is a blind hole connected to the corresponding first recessed hole and does not expose the plate surface of the corresponding grounding terminal.

[0019] In some embodiments, the insulating frame further has a bottom surface connected to the surface, and a top surface connected to the surface and opposite to the bottom surface, and the two second recessed holes of each recessed section, which are far away from each other, extend to the bottom surface and the top surface respectively.

[0020] In some embodiments, each of the recessed sections has an inner peripheral surface that is enclosed and surrounded, and each of the recessed sections is formed with a recessed hole located within the inner peripheral surface.

[0021] In some embodiments, the recessed hole is a hollow hole through which the board surface of the corresponding ground terminal is partially exposed.

[0022] One object of the present invention is to provide an electrical connector that overcomes at least one disadvantage of the prior art.

[0023] The electrical connector of the present invention comprises an insulating base and a plurality of terminal modules as described above. The insulating base has a plurality of spaced-apart side walls, with a plurality of receiving cavities formed between each pair of adjacent side walls. The plurality of terminal modules are disposed within the insulating base, with each terminal module being mounted within a corresponding receiving cavity.

[0024] In some embodiments, one of the side walls corresponding to each of the receiving cavities is provided with at least one first holding portion, and the insulating frame has at least one second holding portion held by the first holding portion.

[0025] In some embodiments, the first retaining portion is a rib, and the second retaining portion is a groove engaged with the first retaining portion.

[0026] In some embodiments, one of the side walls corresponding to each of the receiving cavities is provided with two first holding portions, and the insulating frame has two second holding portions that respectively hold the two first holding portions.

[0027] In some embodiments, the two second retaining portions are respectively located on opposite sides of the insulating frame, and each second retaining portion corresponds to the corresponding ground terminal.

[0028] In some embodiments, the insulating frame further has two outer side surfaces facing the two second retaining portions respectively, and two retaining protrusions respectively protruding from the two outer side surfaces, and each of the retaining protrusions interferes with the corresponding first retaining portion.

[0029] In some embodiments, the differential signal terminal pair has two signal terminals, and each second retaining portion is located between a corresponding signal terminal and a corresponding ground terminal.

[0030] In some embodiments, the insulating frame has two inner side surfaces located on opposite sides of the corresponding second retaining portion, and a retaining protrusion protruding from at least one of the two inner side surfaces, and the retaining protrusion interferes with the corresponding first retaining portion.

[0031] In some embodiments, the insulating frame of each terminal module further has an end surface facing the side wall provided with the first retaining portion, and a protrusion protruding from the end surface, and the protrusion interferes with the side wall provided with the first retaining portion.

[0032] In some embodiments, the insulating base further has a plurality of partitions disposed between every two adjacent side walls, and every two adjacent side walls of the insulating base and the plurality of partitions cooperate to form a plurality of the receiving cavities.

[0033] In some embodiments, the differential signal terminal pair has two signal terminals, the insulating seat has a mounting portion and a docking portion located on opposite sides, a plurality of the accommodating cavities are formed in the mounting portion, the docking portion of the insulating seat is formed with a plurality of slots, and the side wall corresponding to each of the slots is provided with a plurality of protrusions, each of the protrusions corresponding to the two signal terminals of the corresponding differential signal terminal pair.

[0034] One of the objects of the present invention is to provide an electrical connector assembly that can overcome at least one disadvantage of the prior art.

[0035] Therefore, the electrical connector assembly of the present invention includes a first electrical connector and a second electrical connector.

[0036] The first electrical connector includes an insulating base and a plurality of terminal modules as described above. The insulating base has a side wall. The plurality of terminal modules are staggered on either side of the side wall. The second electrical connector docks with the first electrical connector and includes an insulating base and a plurality of terminal modules as described above. The insulating base has a slot formed therein for receiving the side wall. The plurality of terminal modules are staggered on either side of the slot.

[0037] In some embodiments, the differential signal terminal pair of each of the first connector and the second electrical connector has two signal terminals, each of the terminals of the first electrical connector has an elastic contact portion and a tail exposed from the insulating frame, the multiple elastic contact portions of the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the side wall are arranged in opposite directions and each is bent and extended in a direction close to the side wall, and the multiple tail portions of the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the side wall are all bent and extended in the same direction, each of the terminals of the second electrical connector has an elastic contact portion and a tail exposed from the insulating frame, the multiple elastic contact portions of the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the slot are arranged in opposite directions and each is bent and extended in a direction away from the slot, for docking with the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the side wall, and the multiple tail portions of the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the slot are all bent and extended in the same direction.

[0038] One of the objectives of the present invention is to provide a terminal module that can overcome at least one disadvantage of the prior art.

[0039] Therefore, the terminal module of the present invention includes an insulating frame, a differential signal terminal pair, a first ground terminal and a second ground terminal.

[0040] The insulating frame has a surface. The differential signal terminal pair is fixed to the insulating frame, and the differential signal terminal pair includes a first signal terminal and a second signal terminal. Each signal terminal has a body portion, a resilient contact portion extending from a first end of the body portion, and a tail portion extending from a second end of the body portion. The surface covers at least a portion of the body portion of the first signal terminal and the body portion of the second signal terminal. The first ground terminal and the second ground terminal are fixed to the insulating frame, the first ground terminal being adjacent to the first signal terminal, and the second ground terminal being adjacent to the second signal terminal. Each ground terminal has a body portion, a resilient contact portion extending from a first end of the body portion, and a tail portion extending from a second end of the body portion. The surface covers at least a portion of the body portion of the first ground terminal and the body portion of the second ground terminal. The surface is provided with at least one first recessed section that exposes a portion of the body portion of the first ground terminal, and the surface is provided with at least one second recessed section that exposes a portion of the body portion of the second ground terminal.

[0041] In some embodiments, the first recessed section exposes a majority of the body portion of the first ground terminal, and the second recessed section exposes a majority of the body portion of the second ground terminal.

[0042] In some embodiments, the surface is further provided with at least one third recessed section located on one side of the first recessed section, and at least one fourth recessed section located on one side of the second recessed section, the recessed depth of the third recessed section is smaller than the recessed depth of the first recessed section, and the recessed depth of the fourth recessed section is smaller than the recessed depth of the second recessed section.

[0043] In some embodiments, the surface is provided with two third recessed sections respectively located on opposite sides of the first recessed section, and two fourth recessed sections respectively located on opposite sides of the second recessed section.

[0044] In some embodiments, the surface is provided with two first recessed sections and two second recessed sections.

[0045] In some embodiments, the surface is further provided with at least one third recessed section located on one side of the corresponding first recessed section, and at least one fourth recessed section located on one side of the corresponding second recessed section, the recessed depth of the third recessed section being smaller than the recessed depth of the first recessed section, and the recessed depth of the fourth recessed section being smaller than the recessed depth of the second recessed section.

[0046] In some embodiments, the third recessed section is located between the two first recessed sections, and the fourth recessed section is located between the two second recessed sections.

[0047] In some embodiments, the first recessed section and the third recessed section are arranged along a length direction of the first ground terminal, and the second recessed section and the fourth recessed section are arranged along a length direction of the second ground terminal.

[0048] The present invention has at least the following effects: by virtue of the design that each terminal module has two recessed sections recessed in the surface, at least a portion of the position of each recessed section corresponds to the corresponding ground terminal, and each recessed section is a long structure and its length extends along the length direction of the corresponding ground terminal, the coupling between each ground terminal and the adjacent corresponding signal terminal can be reduced, thereby improving the coupling between the two signal terminals of the differential signal terminal pair, so that the two signal terminals can maintain good signal integrity performance when transmitting signals, thereby reducing crosstalk interference between the two adjacent differential signal terminal pairs. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Other features and effects of the present invention will be more clearly seen in the following embodiments with reference to the accompanying drawings, in which:

[0050] Figure 1 is a perspective view of a first embodiment of the electrical connector assembly of the present invention, illustrating two electrical connectors mating with each other;

[0051] Figure 2 is an exploded perspective view of the first embodiment, illustrating the assembly relationship between the two electrical connectors;

[0052] Figure 3 is an incomplete exploded perspective view of the electrical connector of the first embodiment, illustrating the assembly relationship between an insulating base and a plurality of rows of terminals;

[0053] Figure 4 is a fragmentary top view of the electrical connector of the first embodiment;

[0054] Figure 5 is a fragmentary bottom view of the electrical connector of the first embodiment;

[0055] Figure 6 It is along Figure 4An incomplete cross-sectional view taken along line VI-VI;

[0056] Figure 7 is a fragmentary cross-sectional view of the electrical connector of the first embodiment, illustrating a terminal module installed in a receiving cavity of the insulating base;

[0057] Figure 8 is an incomplete sectional exploded view of the electrical connector of the first embodiment, illustrating the assembly relationship between the terminal module and the receiving cavity of the insulating base;

[0058] Figure 9 is an incomplete three-dimensional diagram of the terminal module of the first embodiment, illustrating the structure of a differential signal terminal pair and two ground terminals, with an insulating frame omitted in the figure;

[0059] Figure 10 is a side view of the terminal module of the first embodiment;

[0060] Figure 11 is a three-dimensional view of the terminal module of the first embodiment viewed from another perspective;

[0061] Figure 12 is a side view of the terminal module of the first embodiment;

[0062] Figure 13 It is along Figure 12 A sectional view taken along line XIII-XIII in FIG.

[0063] Figure 14 is a fragmentary cross-sectional view of the first embodiment;

[0064] Figure 15 is a fragmentary cross-sectional view of an electrical connector according to a second embodiment of the electrical connector assembly of the present invention;

[0065] Figure 16 is a fragmentary exploded cross-sectional view of the electrical connector of the second embodiment;

[0066] Figure 17 is a three-dimensional view of the terminal module of the second embodiment viewed from another perspective;

[0067] Figure 18 is a side view of the terminal module of the second embodiment; and

[0068] Figure 19 It is along Figure 18 A sectional view taken along the XIX-XIX line.

[0069]

Explanation of symbols

[0070] 100:Electrical connector

[0071] 1: Insulation seat

[0072] 101: Installation

[0073] 102: Docking

[0074] 11: First side

[0075] 12: Second side

[0076] 13: First side wall

[0077] 131: Spacer rib

[0078] 132: Bump

[0079] 14: Second side wall

[0080] 15: Partition

[0081] 16: Slot

[0082] 17: Receiving chamber

[0083] 18: First holding part

[0084] 2: Terminal module

[0085] 20: Differential signal terminal pair

[0086] 21: Signal terminal

[0087] 211: Ontology Department

[0088] 212: elastic contact portion

[0089] 213: Tail

[0090] 22: Ground terminal

[0091] 221: Ontology Department

[0092] 222: elastic contact portion

[0093] 223: Tail

[0094] 224: Board

[0095] 23: Insulation frame

[0096] 24: Support frame

[0097] 240: Bottom

[0098] 241: Top

[0099] 242: Surface

[0100] 243: Depression

[0101] 244:Inside

[0102] 245: Bridge

[0103] 246: first recessed hole

[0104] 247: Second recessed hole

[0105] 248: Inner Surface

[0106] 249: Depression hole

[0107] 25: Holding frame

[0108] 251: End face

[0109] 252: Second holding portion

[0110] 253: Outer side

[0111] 254: Retaining bump

[0112] 255:convex part

[0113] 256:Inside

[0114] T: Terminal row

[0115] R: Column

[0116] L: Length direction

[0117] W: width direction

[0118] D: Depth squareness

[0119] l: length

[0120] w: width

[0121] d: depth

[0122] D1: First direction

[0123] D2: Second direction

[0124] D3: Third direction DETAILED DESCRIPTION

[0125] Before the present invention is described in detail, it should be noted that similar elements are denoted by the same reference numerals in the following description.

[0126] See Figure 1 and Figure 2The first embodiment of the electrical connector assembly of the present invention includes two electrical connectors 100 having the same structure and mating with each other. The two electrical connectors 100 are mezzanine connectors. The two electrical connectors 100 can be divided into a first electrical connector and a second electrical connector mating with the first electrical connector.

[0127] For ease of explanation, the electrical connector assembly is defined as follows: a first direction D1, a second direction D2 perpendicular to the first direction D1, and a third direction D3 perpendicular to both the first direction D1 and the second direction D2. The first direction D1 is one of the front-to-back direction and the left-to-right direction. The second direction D2 is the other of the front-to-back direction and the left-to-right direction. The third direction D3 is the up-down direction.

[0128] See Figures 3 to 8 Each electrical connector 100 includes an insulating base 1 and a plurality of terminal rows T arranged on the insulating base 1. The insulating base 1 has a first side 11, a second side 12, a plurality of first sidewalls 13, and a plurality of second sidewalls 14. The first side 11 and the second side 12 are parallel to the first direction D1 and located on opposite sides of the insulating base 1. The plurality of first sidewalls 13 are spaced apart from each other along the second direction D2 and are located between the first side 11 and the second side 12. The plurality of second sidewalls 14 are spaced apart from each other along the second direction D2 and are located between the first side 11 and the second side 12. The plurality of second sidewalls 14 and the plurality of first sidewalls 13 are arranged alternately along the second direction D2. The height of each second sidewall 14 along the third direction D3 is less than the height of each first sidewall 13 along the third direction D3. The insulating base 1 further has a plurality of partitions 15 disposed between every two adjacent first side walls 13 and second side walls 14 . The plurality of partitions 15 are arranged at intervals along the first direction D1 .

[0129] The insulating base 1 is formed with a plurality of slots 16, which are arranged alternately with the plurality of first side walls 13 along the second direction D2. Each slot 16 is configured to receive a corresponding first side wall 13 of another electrical connector 100. Every two adjacent first side walls 13 of the insulating base 1 cooperate with the second side wall 14 and a plurality of partitions 15 to form a plurality of receiving cavities 17. The receiving cavities 17 of the insulating base 1 are arranged in a plurality of rows R, spaced apart along the second direction D2. The corresponding receiving cavities 17 in each row R are spaced apart along the first direction D1 and communicate with the corresponding slots 16. Every two adjacent receiving cavities 17 along the first direction D1 are separated by a corresponding partition 15, such that the receiving cavities 17 and the partitions 15 alternate along the first direction D1. The second side wall 14 corresponding to each receiving cavity 17 is provided with at least one first retaining portion 18. The corresponding receiving cavities 17 of every two adjacent rows R are staggeredly formed on the insulating base 1 .

[0130] See Figure 4 、 Figure 6 、 Figures 7 and 8 The insulating base 1 has a mounting portion 101 and a docking portion 102 on opposite sides. A plurality of receiving cavities 17 are formed in the mounting portion 101. The docking portion 102 is formed with a plurality of slots 16. The first sidewall 13 corresponding to each slot 16 is provided with a plurality of spacer ribs 131 and a plurality of protrusions 132.

[0131] See Figures 4 to 8 , multiple terminal rows T are arranged at intervals along the second direction D2. Each row of the terminal rows T includes multiple terminal modules 2 arranged at intervals along the first direction D1. Each of the terminal modules 2 is used to be installed in the corresponding receiving cavity 17 of the insulating seat 1. The corresponding multiple terminal modules 2 installed in the corresponding multiple receiving cavities 17 of each two adjacent multiple rows R are staggered on the insulating seat 1. Each of the terminal modules 2 includes a differential signal terminal pair 20, two grounding terminals 22 respectively located on the outside of the differential signal terminal pair 20, and an insulating frame 23 integrally formed to partially cover the differential signal terminal pair 20 and the two grounding terminals 22. The differential signal terminal pair 20 includes two signal terminals 21 arranged at intervals along the first direction D1. Each of the protrusions 132 of the insulating seat 1 corresponds to the two signal terminals 21 of the corresponding differential signal terminal pair 20.

[0132] See Figures 8 to 10Each signal terminal 21 comprises a main body 211, a resilient contact portion 212 extending from one end of the main body 211, and a tail portion 213 extending from an end of the main body 211 opposite the resilient contact portion 212. Specifically, the resilient contact portion 212 extends upward from the top of the main body 211, while the tail portion 213 extends downward from the bottom of the main body 211 at a right angle. The bottom end of the tail portion 213 is used for soldering a solder ball (not shown).

[0133] The two ground terminals 22 are located outside the two signal terminals 21, respectively. Each ground terminal 22 comprises a main body 221, a resilient contact portion 222 extending from one end of the main body 221, and a tail portion 223 extending from an end of the main body 221 opposite the resilient contact portion 222. Specifically, the resilient contact portion 222 extends upward from the top of the main body 221, while the tail portion 223 extends downward from the bottom of the main body 221 at a right angle. The bottom end of the tail portion 223 is used for soldering a solder ball (not shown). The main body 221 of each ground terminal 22 has a plate surface 224.

[0134] The insulating frame 23 is accommodated in the corresponding receiving cavity 17. In the first embodiment, the insulating frame 23 is formed by integrally covering a portion of the body portion 211 of each signal terminal 21 and a portion of the body portion 221 of each ground terminal 22 by plastic, such as insert molding, so that the elastic contact portion 212 and the tail portion 213 of each signal terminal 21 extend out of the upper and lower ends of the insulating frame 23, and the elastic contact portion 222 and the tail portion 223 of each ground terminal 22 extend out of the upper and lower ends of the insulating frame 23.

[0135] See Figure 6 、 Figure 8 、 Figure 10 and Figure 11 The insulating frame 23 includes a support frame 24 and a retaining frame 25 formed on one side of the support frame 24. The height of the support frame 24 along the third direction D3 is greater than the height of the retaining frame 25 along the third direction D3. The support frame 24 is used to support the body 211 of each signal terminal 21 and the body 221 of each ground terminal 22. The support frame 24 has a bottom surface 240, a top surface 241 opposite to the bottom surface 240, and a surface 242 connected between the bottom surface 240 and the top surface 241. The surface 242 faces the corresponding first sidewall 13.

[0136] See Figure 11 、 Figure 12 and Figure 13, the surface 242 of the support frame 24 corresponds to the plate surface 224 of the two grounding terminals 22. The surface 242 is provided with two recessed sections 243. The position of each recessed section 243 corresponds at least in part to the plate surface 224 of the corresponding grounding terminal 22. Each recessed section 243 is a long structure and its length extends along a length direction L of the corresponding grounding terminal 22. The length direction L is parallel to the third direction D3. Since the dielectric constant of air is smaller than the dielectric constant of the insulating frame 23, the two recessed sections 243 are formed by recessing the surface 242 of the support frame 24 so that air can be accommodated in the two recessed sections 243 to reduce the dielectric constant of the insulating frame 23 at the two recessed sections 243. In this way, the coupling between each ground terminal 22 and the adjacent corresponding signal terminal 21 can be reduced, thereby improving the coupling between the two signal terminals 21 of the differential signal terminal pair 20, so that the two signal terminals 21 can maintain good signal integrity performance when transmitting signals.

[0137] In the first embodiment, each recessed section 243 at least partially overlaps with a position perpendicularly projected from the plate surface 224 of the corresponding ground terminal 22 onto the surface 242 of the support frame 24. Of course, each recessed section 243 of the first embodiment may also completely overlap with a position perpendicularly projected from the plate surface 224 of the corresponding ground terminal 22 onto the surface 242 of the support frame 24, and is not limited to the aforementioned partial overlap.

[0138] In the first embodiment, each recessed section 243 extends to at least one of the bottom surface 240 and the top surface 241 of the support frame 24. This increases the length of the recessed section 243 in the longitudinal direction L and the area of ​​overlap with the corresponding ground terminal 22. Preferably, each recessed section 243 in the first embodiment extends to both the bottom surface 240 and the top surface 241, such that the length of the recessed section 243 in the longitudinal direction L is the same as the length of the support frame 24 in the longitudinal direction L. This maximizes the length of the recessed section 243 and the area of ​​overlap with the corresponding ground terminal 22.

[0139] In this first embodiment, each of the recessed sections 243 has two inner side surfaces 244 and a plurality of bridging portions 245. The two inner side surfaces 244 are spaced apart along the first direction D1. The plurality of bridging portions 245 are connected between the two inner side surfaces 244 and are spaced apart along the length direction L. Each of the recessed sections 243 is formed with a plurality of first recessed holes 246. Each of the first recessed holes 246 is located between the two inner side surfaces 244 and between two adjacent bridging portions 245. The design method of forming the plurality of bridging portions 245 connected between the two inner side surfaces 244 by solidifying the plastic can improve the flow uniformity of the plastic during the process of insert molding the insulating frame 23 and enhance the structural strength of the insulating frame 23 after molding.

[0140] Each of the first recessed holes 246 is elongated, with its length extending along the longitudinal direction L. Each of the first recessed holes 246 has a length l along the longitudinal direction L, a width w along the width direction W of the corresponding ground terminal 22, and a depth d along a depth dimension D perpendicular to the longitudinal direction L and the width direction W. The width direction W and the depth dimension D are parallel to the first direction D1 and the second direction D2, respectively. Preferably, the length l, width w, and depth d of the first recessed hole 246 are designed to be as large as possible, thereby allowing the first recessed hole 246 to accommodate more air and increasing the overlapping area between the recessed section 243 and the corresponding ground terminal 22. Specifically, each of the first recessed holes 246 of the first embodiment is a hollow hole extending to a depth d to the plate surface 224 of the body portion 221 of the corresponding ground terminal 22, partially exposing the plate surface 224 of the body portion 221 of the corresponding ground terminal 22. This maximizes the air volume of the first recessed hole 246.

[0141] Furthermore, each bridging portion 245 is spaced apart from the surface 242 of the support frame 24. Each recessed section 243 is also formed with a plurality of second recessed holes 247. Each second recessed hole 247 is located between the two inner side surfaces 244 and the corresponding bridging portion 245. Each second recessed hole 247 is a blind hole that connects to the corresponding first recessed hole 246 and does not expose the plate surface 224 of the main body 221 of the corresponding ground terminal 22. The plurality of second recessed holes 247 provide air accommodation, thereby further increasing the air capacity of each recessed section 243. In addition, two second recessed holes 247 of each recessed section 243, which are separated from each other, extend to the bottom surface 240 and the top surface 241 of the support frame 24, respectively. In this way, air can flow upward from the second recessed holes 247 extending to the bottom surface 240 into the recessed section 243, or air can flow downward from the second recessed holes 247 extending to the top surface 241 into the recessed section 243.

[0142] See Figure 4 、 Figure 5 、 Figure 7 、 Figure 8 and Figure 10 The retaining frame 25 of the insulating frame 23 has an end surface 251 opposite to the surface 242 and facing the second sidewall 14 where the first retaining portion 18 is disposed, and at least one second retaining portion 252 disposed on the end surface 251 for retaining the first retaining portion 18. In this first embodiment, two first retaining portions 18 are disposed on the second sidewall 14 corresponding to each receiving cavity 17. The two first retaining portions 18 are spaced apart along the first direction D1 and are respectively adjacent to the two corresponding partitions 15. The two first retaining portions 18 are connected to the two corresponding partitions 15, for example, but are not limited thereto. The retaining frame 25 of the insulating frame 23 has two second retaining portions 252, respectively, for retaining the two first retaining portions 18. The two second retaining portions 252 are located on opposite sides of the retaining frame 25. Each second retaining portion 252 corresponds to a corresponding ground terminal 22. By respectively holding the two first holding portions 18 by the two second holding portions 252 , the stability of the insulating frame 23 held in the corresponding receiving cavity 17 can be enhanced.

[0143] Specifically, each of the first retaining portions 18 is a rib extending from the second sidewall 14 toward the receiving cavity 17. Each of the second retaining portions 252 is a groove recessed inwardly from the end surface 251 for engagement with the rib.

[0144] More specifically, the retaining frame 25 of the insulating frame 23 further comprises two outer side surfaces 253 spaced apart along the first direction D1 and facing the two second retaining portions 252, two retaining protrusions 254 protruding from each of the outer side surfaces 253, and a plurality of protrusions 255 protruding from the end surface 251. Each retaining protrusion 254 interferes with the corresponding first retaining portion 18, preventing the insulating frame 23 from rocking relative to the insulating base 1 along the first direction D1. The plurality of protrusions 255 interfere with the corresponding second sidewalls 14, preventing the insulating frame 23 from rocking relative to the insulating base 1 along the second direction D2. This enhances the stability of the insulating frame 22 within the corresponding receiving cavity 17.

[0145] See Figures 4 to 7 When each terminal module 2 is installed in the corresponding receiving cavity 17 of the insulating base 1, the elastic contact portion 212 of each signal terminal 21 and the elastic contact portion 222 of each ground terminal 22 extend between the corresponding plurality of spacer ribs 131. The elastic contact portion 212 of each signal terminal 21 corresponds to the corresponding protrusion 132, thereby reducing the impedance of the elastic contact portion 212. The two second retaining portions 252 of the insulating frame 23 respectively retain the two first retaining portions 18. The two retaining protrusions 254 interfere with the corresponding two first retaining portions 18. The multiple protrusions 255 interfere with the corresponding second sidewalls 14.

[0146] See Figure 8 、 Figure 10 、 Figure 11 and Figure 12 The two recessed sections 243 of each terminal module 2 can reduce the coupling between each ground terminal 22 and its adjacent corresponding signal terminal 21, thereby improving the coupling between the two signal terminals 21 of the differential signal terminal pair 20, allowing the two signal terminals 21 to maintain good signal integrity during signal transmission. This reduces crosstalk interference between two adjacent differential signal terminal pairs 20 in each terminal row T, or in two adjacent terminal rows T. Furthermore, the two second retaining portions 252, each formed as a recess and located on opposite sides of the retaining frame 25, each corresponding to a corresponding ground terminal 22, can further reduce the coupling between each ground terminal 22 and its adjacent corresponding signal terminal 21, thereby further improving the coupling between the two signal terminals 21 of the differential signal terminal pair 20, allowing the two signal terminals 21 to maintain good signal integrity during signal transmission.

[0147] See Figure 6 and Figure 14When the two electrical connectors 100 are mated together, the resilient contact portion 212 of each signal terminal 21 of each terminal module 2 mates with the body portion 211 of the corresponding signal terminal 21 of the terminal module 2, and the resilient contact portion 222 of each ground terminal 22 mates with the body portion 221 of the corresponding ground terminal 22 of the terminal module 2. Furthermore, each protrusion 132 of the electrical connector 100 is spaced apart from the corresponding protrusion 132 of the other electrical connector 100 in the second direction D2 and is located on opposite sides of the two mating signal terminals 21. This ensures that the impedance encountered by the signal along the transmission path between the two contact points of the two mating signal terminals 21 remains similar or consistent, thereby enhancing signal integrity.

[0148] See Figure 4 、 Figure 5 and Figure 14 In each of the two corresponding terminal rows T on both sides of the first side wall 13 of the insulating base 1 of the electrical connector 100, the multiple terminal modules 2 of the two terminal rows T are arranged alternately on both sides of the first side wall 13. The multiple grounding terminals 22 and the multiple elastic contact portions 222 and 212 of the multiple signal terminals 21 arranged on both sides of the first side wall 13 are arranged in opposite directions and each bends and extends toward the first side wall 13. The multiple tail portions 223 and 213 of the multiple grounding terminals 22 and the multiple signal terminals 21 arranged on both sides of the first side wall 13 all bend and extend in the same direction.

[0149] One of the terminal modules 2 arranged on one side of the first side wall 13 corresponds to a position between two adjacent terminal modules 2 arranged on the other side of the first side wall 13, and each signal terminal 21 of one of the terminal modules 2 arranged on one side of the first side wall 13 corresponds to a position of a corresponding ground terminal 22 of the corresponding terminal module 2 arranged on the other side of the first side wall 13. In this way, most of the differential signal terminal pairs 20 are surrounded by the two ground terminals 22 in the same column and the corresponding ground terminals 22 in the adjacent column, thereby reducing crosstalk interference.

[0150] In the two corresponding terminal rows T on either side of each slot 16 of the insulating base 1 of the electrical connector 100, the multiple terminal modules 2 of the two terminal rows T are arranged alternately on both sides of the slot 16. The multiple elastic contact portions 222 and 212 of the multiple grounding terminals 22 and multiple signal terminals 21 of the two corresponding terminal modules 2 arranged on either side of the slot 16 are arranged in opposite directions and each bends and extends away from the slot 16 to mate with the multiple grounding terminals 21 and multiple signal terminals 23 of the two corresponding terminal modules 2 arranged on either side of the first sidewall 13. The multiple tail portions 223 and 213 of the multiple grounding terminals 22 and multiple signal terminals 21 of the two corresponding terminal modules 2 arranged on either side of the slot 16 all bend and extend in the same direction.

[0151] One of the terminal modules 2 arranged on one side of the slot 16 corresponds to a position between two adjacent terminal modules 2 arranged on the other side of the slot 16, and each of the signal terminals 21 of one of the terminal modules 2 arranged on one side of the slot 16 corresponds to a position of a corresponding ground terminal 22 of the corresponding terminal module 2 arranged on the other side of the slot 16. In this way, most of the differential signal terminal pairs 20 can be surrounded by the two ground terminals 22 in the same column and the corresponding two ground terminals 22 in the adjacent column, thereby reducing crosstalk interference.

[0152] See Figure 11 、 Figure 12 and Figure 13 It should be noted that each of the recessed sections 243 of the first embodiment may also have the following different implementations depending on the needs:

[0153] In one embodiment, the number of the bridge portion 245 and the number of the first recessed hole 246 are each one. The bridge portion 245 is flush with the surface 242 of the support frame 24 and is not spaced apart from the surface 242, so that each recessed section 243 does not form the second recessed hole 247. The first recessed hole 246 is located at one end of the bridge portion 245.

[0154] In another embodiment, there is one bridge portion 245 and two first recessed holes 246. The bridge portion 245 is flush with the surface 242 of the support frame 24 and is not spaced apart from the surface 242, so that each recessed section 243 does not form the second recessed hole 247. The two first recessed holes 246 are located at opposite ends of the bridge portion 245 and are arranged along the length direction L.

[0155] In another embodiment, the number of the bridge portion 245, the number of the first recessed hole 246, and the number of the second recessed hole 247 are each one. The first recessed hole 246 is located at one end of the bridge portion 245. The second recessed hole 247 is located at the bridge portion 245 and communicates with the first recessed hole 246.

[0156] In another embodiment, the number of the bridge portion 245 is one, the number of the first recessed holes 246 is two, and the number of the second recessed hole 247 is one. The two first recessed holes 246 are located at opposite ends of the bridge portion 245 and are arranged along the length direction L. The second recessed hole 247 is located on the bridge portion 245 and communicates with the two first recessed holes 246.

[0157] In another embodiment, each of the bridging portions 245 is flush with the surface 242 of the support frame 24 and is not spaced apart from the surface 242, so that each of the recessed sections 243 does not form the second recessed hole 247.

[0158] See Figure 10 、 Figure 11 、 Figure 12 and Figure 13 In this first embodiment, the plurality of signal terminals 23 are respectively a first signal terminal and a second signal terminal fixed to the insulating frame 23. The elastic contact portion 212 of each signal terminal 23 extends from a first end of the main body 211. The tail portion 213 of each signal terminal 23 extends from a second end of the main body 211. The second end is opposite to the first end. The surface 242 of the insulating frame 23 covers at least a majority of the main body 211 of the first signal terminal and the main body 211 of the second signal terminal.

[0159] The plurality of grounding terminals 22 are respectively a first grounding terminal and a second grounding terminal fixed to the insulating frame 23. The first grounding terminal is adjacent to the first signal terminal, and the second grounding terminal is adjacent to the second signal terminal. The elastic contact portion 222 of each grounding terminal 22 extends from a first end of the main body 221. The tail portion 223 of each grounding terminal 22 extends from a second end of the main body 221. The second end is opposite to the first end. The surface 242 of the insulating frame 23 covers at least a portion of the main body 221 of the first grounding terminal and the main body 221 of the second grounding terminal. The surface 242 is provided with at least one first recessed section and at least one second recessed section. The first recessed section exposes a portion of the main body 221 of the first grounding terminal. The second recessed section exposes a portion of the main body 221 of the second grounding terminal. The aforementioned first recessed section is the first recessed hole 246 of one of the recessed sections 243, and the aforementioned second recessed section is the first recessed hole 246 of the other recessed section 243. Specifically, the first recessed section exposes a majority of the body portion 221 of the first ground terminal. The second recessed section exposes a majority of the body portion 221 of the second ground terminal. The recessed section serves to extend a section along the body portion 221 to achieve its function.

[0160] In one embodiment, the surface 242 is further provided with at least one third recessed section located on one side of the first recessed section, and at least one fourth recessed section located on one side of the second recessed section. The recessed depth of the third recessed section is less than that of the first recessed section, and the recessed depth of the fourth recessed section is less than that of the second recessed section. The aforementioned third recessed section is the second recessed hole 247 of one of the recessed sections 243, and the aforementioned fourth recessed section is the second recessed hole 247 of the other recessed section 243. Furthermore, the surface 242 is provided with two third recessed sections, respectively located on opposite sides of the first recessed section, and two fourth recessed sections, respectively located on opposite sides of the second recessed section. The aforementioned two third recessed sections are the two second recessed holes 247 of one of the recessed sections 243, and the aforementioned two fourth recessed sections are the two second recessed holes 247 of the other recessed section 243.

[0161] In another embodiment, the surface 242 is provided with two first recessed sections and two second recessed sections. The two first recessed sections are respectively the two first recessed holes 246 of one of the recessed sections 243, and the two second recessed sections are respectively the two first recessed holes 246 of the other recessed section 243. Furthermore, the surface 242 is further provided with at least one third recessed section located on one side of the corresponding first recessed section, and at least one fourth recessed section located on one side of the corresponding second recessed section. The recessed depth of the third recessed section is less than the recessed depth of the first recessed section, and the recessed depth of the fourth recessed section is less than the recessed depth of the second recessed section. The third recessed section is the second recessed hole 247 of one of the recessed sections 243, and the fourth recessed section is the second recessed hole 247 of the other recessed section 243. Specifically, the third recessed section is located between the two first recessed sections, and the fourth recessed section is located between the two second recessed sections. More specifically, the surface 242 is provided with two third recessed sections, one located on opposite sides of each first recessed section, and two fourth recessed sections, one located on opposite sides of each second recessed section. The two third recessed sections are the two second recessed holes 247 of one of the recessed sections 243, and the two fourth recessed sections are the two second recessed holes 247 of the other recessed section 243.

[0162] In the aforementioned two embodiments, the first and third recessed sections are arranged along a length direction L of the first ground terminal, and the second and fourth recessed sections are arranged along a length direction L of the second ground terminal. The third recessed section does not expose the body portion 221 of the first ground terminal, and the fourth recessed section does not expose the body portion 221 of the second ground terminal.

[0163] See Figure 15 The overall structure of the second embodiment of the electrical connector assembly of the present invention is substantially the same as that of the first embodiment, and the difference lies in the detailed structure of each of the electrical connectors 100 .

[0164] See Figure 15 and Figure 16In the second embodiment, the second sidewall 14 corresponding to each receiving cavity 17 is provided with two first retaining portions 18, respectively spaced apart from the corresponding two partitions 15. Each second retaining portion 252 of the retaining frame body 25 of the insulating frame 23 is located between the corresponding signal terminal 21 and the corresponding ground terminal 22. Each second retaining portion 252 is retained by the corresponding first retaining portion 18. The retaining frame body 25 of the insulating frame 23 has two inner side surfaces 256 located on opposite sides of the corresponding second retaining portion 252, and a retaining protrusion 254 protruding from at least one of the two inner side surfaces 256. The retaining protrusion 254 interferes with the corresponding first retaining portion 18. Specifically, the retaining frame body 25 has two retaining protrusions 254 protruding from the two inner side surfaces 256, and the two retaining protrusions 254 interfere with the corresponding first retaining portion 18.

[0165] See Figure 17 、 Figure 18 and Figure 19 In the second embodiment, each recessed section 243 completely overlaps with the position of the corresponding ground terminal 22's plate surface 224 perpendicularly projected onto the surface 242 of the support frame 24. Each recessed section 243 is spaced apart from the bottom surface 240 and the top surface 241 of the support frame 24. Each recessed section 243 has an inner circumferential surface 248 that is enclosed. Each recessed section 243 defines a recessed hole 249 within the inner circumferential surface 248. The recessed hole 249 extends to a depth d to the plate surface 224 of the body portion 221 of the corresponding ground terminal 22 and is defined by the inner circumferential surface 248, partially exposing the plate surface 224 of the body portion 221 of the corresponding ground terminal 22.

[0166] It should be noted that each of the recessed sections 243 of the second embodiment may also have the following different implementations depending on the needs:

[0167] In one embodiment, each of the recessed sections 243 at least partially overlaps with a position where the plate surface 224 of the corresponding ground terminal 22 is vertically projected onto the surface 242 of the support frame 24.

[0168] In another embodiment, the recessed hole 249 of each recessed section 243 is a blind hole whose depth d does not extend to the board surface 224 of the corresponding ground terminal 22 and does not expose the board surface 224 of the corresponding ground terminal 22.

[0169] In summary, the electrical connector 100 of each embodiment can reduce the coupling between each ground terminal 22 and the adjacent corresponding signal terminal 21 by virtue of each terminal module 2 having the two recessed sections 243 recessed in the surface 242, at least a portion of the position of each recessed section 243 corresponding to the corresponding ground terminal 22, and each recessed section 243 being a long structure and its length extending along the length direction L of the corresponding ground terminal 22, so as to improve the coupling between the two signal terminals 21 of the differential signal terminal pair 20, so that the two signal terminals 21 can maintain good signal integrity performance when transmitting signals, thereby reducing crosstalk interference between the two adjacent differential signal terminal pairs 20, and thus can indeed achieve the purpose of the present invention.

[0170] However, the above description is merely an embodiment of the present invention and cannot be used to limit the scope of protection of the claims of the present invention. Any simple equivalent changes and modifications made according to the claims of the present invention and the contents of the specification are still within the scope of the claims of the present invention.

Claims

1. A terminal module, comprising: a differential signal terminal pair; Two ground terminals, respectively located outside the differential signal terminal pair, each of the ground terminals having a plate surface; and An insulating frame is integrally formed to partially cover the differential signal terminal pair and the two ground terminals. The insulating frame has a surface corresponding to the plate surfaces of the two ground terminals. The surface is provided with two recessed sections. At least a portion of the position of each recessed section corresponds to the plate surface of the corresponding ground terminal. Each recessed section is an elongated structure and its length extends along a length direction of the corresponding ground terminal.

2. The terminal module according to claim 1, wherein: The insulating frame further comprises a bottom surface connected to the surface, and a top surface connected to the surface and opposite to the bottom surface. Each of the recessed sections at least extends to one of the bottom surface and the top surface.

3. The terminal module according to claim 2, wherein: Each of the recessed sections extends to the bottom surface and the top surface.

4. The terminal module according to claim 1, wherein: The insulating frame further comprises a bottom surface connected to the surface, and a top surface connected to the surface and opposite to the bottom surface. Each of the recessed sections is spaced apart from the bottom surface and the top surface.

5. The terminal module according to claim 1, wherein: Each of the recessed sections is formed with a recessed hole.

6. The terminal module according to claim 5, wherein: The recessed hole is a hollow hole for partially exposing the board surface of the corresponding ground terminal.

7. The terminal module according to claim 5, wherein: The recessed hole is a blind hole that does not expose the board surface of the corresponding ground terminal.

8. The terminal module according to claim 5, wherein: The recessed hole is in the shape of an elongated hole and its length extends along the length direction. The recessed hole has a length taken along the length direction, a width taken along a width direction of the corresponding grounding terminal, and a depth taken along a depth dimension perpendicular to the length direction and the width direction.

9. The terminal module according to claim 1, wherein: Each of the recessed sections is formed with a first recessed hole and a second recessed hole arranged along the length direction and interconnected. The first recessed hole is a hollow hole for partially exposing the board surface of the corresponding grounding terminal, and the second recessed hole is a blind hole that does not expose the board surface of the corresponding grounding terminal.

10. The terminal module according to claim 1, wherein: Each of the recessed sections has two inner side surfaces and at least one bridge portion connected between the two inner side surfaces. Each of the recessed sections is formed with at least one first recessed hole located between the two inner side surfaces and at one end of the bridge portion.

11. The terminal module according to claim 10, wherein: Each of the recessed sections is formed with two first recessed holes which are respectively located at opposite ends of the bridge portion and arranged along the length direction.

12. The terminal module according to claim 10 or 11, wherein: The bridging portion is spaced apart from the surface, and each of the recessed sections is further formed with a second recessed hole located between the two inner side surfaces and the bridging portion. The first recessed hole is a hollow hole for partially exposing the plate surface of the corresponding grounding terminal, and the second recessed hole is a blind hole connected to the first recessed hole and does not expose the plate surface of the corresponding grounding terminal.

13. The terminal module according to claim 10, wherein: Each of the recessed sections has a plurality of bridge portions spaced apart along the length direction. Each of the recessed sections is formed with a plurality of first recessed holes, and each of the first recessed holes is located between two adjacent bridge portions.

14. The terminal module according to claim 13, wherein: Each of the bridge portions is spaced apart from the surface, and each of the recessed sections is further formed with a plurality of second recessed holes. Each of the first recessed holes is a hollow hole for partially exposing the plate surface of the corresponding grounding terminal. Each of the second recessed holes is located between the two inner side surfaces and the corresponding bridge portion. Each of the second recessed holes is a blind hole that is connected to the corresponding first recessed hole and does not expose the plate surface of the corresponding grounding terminal.

15. The terminal module according to claim 14, wherein: The insulating frame further comprises a bottom surface connected to the surface, and a top surface connected to the surface and opposite to the bottom surface. Two second recessed holes, which are far away from each other, of each recessed section extend to the bottom surface and the top surface respectively.

16. The terminal module according to claim 1, wherein: Each of the recessed sections has an inner peripheral surface in a surrounding closed shape, and each of the recessed sections is formed with a recessed hole located in the inner peripheral surface.

17. The terminal module according to claim 16, wherein: The recessed hole is a hollow hole for partially exposing the board surface of the corresponding ground terminal.

18. An electrical connector, comprising: an insulating base having a plurality of spaced-apart side walls, wherein a plurality of receiving cavities are formed between every two adjacent side walls of the insulating base; and A plurality of terminal modules according to any one of claims 1 to 17, wherein the plurality of terminal modules are arranged on the insulating base, and each of the terminal modules is installed in the corresponding receiving cavity.

19. The electrical connector according to claim 18, wherein: One of the side walls corresponding to each of the receiving cavities is provided with at least one first holding portion, and the insulating frame has at least one second holding portion held on the first holding portion.

20. The electrical connector according to claim 19, wherein The first holding portion is a convex rib, and the second holding portion is a groove engaged with the first holding portion.

21. The electrical connector according to claim 20, wherein: One of the side walls corresponding to each of the receiving cavities is provided with two first holding portions, and the insulating frame has two second holding portions that respectively hold the two first holding portions.

22. The electrical connector according to claim 21, wherein The two second holding portions are respectively located at opposite sides of the insulating frame, and each second holding portion corresponds to the corresponding grounding terminal.

23. The electrical connector according to claim 22, wherein: The insulating frame further comprises two outer side surfaces respectively facing the two second holding portions, and two holding protrusions respectively protruding from the two outer side surfaces, and each holding protrusion interferes with the corresponding first holding portion.

24. The electrical connector according to claim 21, wherein The differential signal terminal pair has two signal terminals, and each second retaining portion is located between the corresponding signal terminal and the corresponding ground terminal.

25. The electrical connector according to claim 24, wherein The insulating frame has two inner side surfaces located at opposite sides of the corresponding second holding portion, and a holding protrusion protruding from at least one of the two inner side surfaces, and the holding protrusion interferes with the corresponding first holding portion.

26. The electrical connector according to claim 19, wherein The insulating frame of each terminal module further comprises an end surface facing the side wall provided with the first retaining portion, and a convex portion protruding from the end surface, wherein the convex portion interferes with the side wall provided with the first retaining portion.

27. The electrical connector according to claim 18, wherein The insulating base body further comprises a plurality of partitions arranged between every two adjacent side walls. Every two adjacent side walls of the insulating base body and the plurality of partitions cooperate to form a plurality of the receiving cavities.

28. The electrical connector according to claim 18, wherein The differential signal terminal pair has two signal terminals, and the insulating base has a mounting portion and a docking portion located on opposite sides. A plurality of accommodating cavities are formed in the mounting portion, and a plurality of slots are formed in the docking portion of the insulating base. The side wall corresponding to each slot is provided with a plurality of protrusions, and each of the protrusions corresponds to the two signal terminals of the corresponding differential signal terminal pair.

29. An electrical connector assembly comprising: A first electrical connector comprising an insulating base, and a plurality of terminal modules according to any one of claims 1 to 17, wherein the insulating base has a side wall, and the plurality of terminal modules are staggeredly arranged on both sides of the side wall; and A second electrical connector is docked with the first electrical connector and includes an insulating base and a plurality of terminal modules as described in any one of claims 1 to 17, wherein the insulating base is formed with a slot for inserting the side wall, and the plurality of terminal modules are staggered on both sides of the slot.

30. The electrical connector assembly according to claim 29, wherein: The differential signal terminal pair of each of the first connector and the second electrical connector has two signal terminals, and each of the terminals of the first electrical connector has an elastic contact portion and a tail exposed from the insulating frame, and the multiple elastic contact portions of the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the side wall are arranged in opposite directions and each is bent and extended in a direction close to the side wall, and the multiple tail portions of the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the side wall are all bent and extended in the same direction, and each of the terminals of the second electrical connector has an elastic contact portion and a tail exposed from the insulating frame, and the multiple elastic contact portions of the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the slot are arranged in opposite directions and each is bent and extended in a direction away from the slot, so as to connect with the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the side wall, and the multiple tail portions of the multiple terminals of the corresponding two terminal modules respectively arranged on both sides of the slot are all bent and extended in the same direction.

31. A terminal module, comprising: an insulating frame having a surface; a differential signal terminal pair fixed to the insulating frame, the differential signal terminal pair comprising a first signal terminal and a second signal terminal, each of the signal terminals comprising a body portion, a resilient contact portion extending from a first end of the body portion, and a tail portion extending from a second end of the body portion, the surface covering at least a majority of the body portion of the first signal terminal and the body portion of the second signal terminal; and A first ground terminal and a second ground terminal are fixed to the insulating frame, the first ground terminal is adjacent to the first signal terminal, and the second ground terminal is adjacent to the second signal terminal. Each of the ground terminals has a main body, an elastic contact portion extending from a first end of the main body, and a tail portion extending from a second end of the main body. The surface covers at least a portion of the main body of the first ground terminal and the main body of the second ground terminal. The surface is provided with at least one first recessed section, the first recessed section exposing a portion of the main body of the first ground terminal, and the surface is provided with at least one second recessed section, the second recessed section exposing a portion of the main body of the second ground terminal.

32. The terminal module according to claim 31, wherein: The first recessed section exposes a majority of the main body portion of the first ground terminal, and the second recessed section exposes a majority of the main body portion of the second ground terminal.

33. The terminal module according to claim 31, wherein: The surface is also provided with at least one third recessed section located on one side of the first recessed section, and at least one fourth recessed section located on one side of the second recessed section. The recessed depth of the third recessed section is smaller than the recessed depth of the first recessed section, and the recessed depth of the fourth recessed section is smaller than the recessed depth of the second recessed section.

34. The terminal module according to claim 33, wherein: The surface is provided with two third concave sections respectively located at opposite sides of the first concave section, and two fourth concave sections respectively located at opposite sides of the second concave section.

35. The terminal module according to claim 31, wherein: The surface is provided with two first concave sections and two second concave sections.

36. The terminal module according to claim 35, wherein: The surface is also provided with at least one third recessed section located on one side of the corresponding first recessed section, and at least one fourth recessed section located on one side of the corresponding second recessed section. The recessed depth of the third recessed section is smaller than the recessed depth of the first recessed section, and the recessed depth of the fourth recessed section is smaller than the recessed depth of the second recessed section.

37. The terminal module according to claim 36, wherein: The third recessed section is located between the two first recessed sections, and the fourth recessed section is located between the two second recessed sections.

38. The terminal module according to claim 33, 34, 36 or 37, wherein: The first recessed section and the third recessed section are arranged along a length direction of the first ground terminal, and the second recessed section and the fourth recessed section are arranged along a length direction of the second ground terminal.

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