CN111370943A - Electrical connector - Google Patents

Abstract

An electric connector comprises a plurality of terminal modules which are stacked together, wherein each terminal module comprises a signal terminal module and a grounding piece which is matched with the signal terminal module, each signal terminal module comprises an insulating body and a signal terminal which is installed on the insulating body, each signal terminal comprises a contact part, a tail part and a connecting part which is connected with the contact part and the tail part, the insulating body is provided with a groove which is used for accommodating the connecting part and a metal layer which is positioned in the groove, the grounding piece covers the side face, provided with the groove, of the insulating body, and the metal layer and the grounding piece jointly encircle the connecting part. According to the invention, the metal layer positioned in the groove is arranged on the insulating body, and the metal layer and the grounding piece together form the external shielding layer for shielding the signal terminal, so that the signal transmission quality is improved.

Description

electrical connector

technical field

The invention relates to an electrical connector, which belongs to the technical field of high-speed connectors.

Background technique

Existing high-speed connectors can be used, for example, in switches to realize high-speed data transmission. In order to improve the quality of data transmission, existing high-speed connectors often require shielding at least partially surrounding the differential signal terminals. The coupling modes of differential signal terminals generally include broadside coupling and narrowside coupling. However, how to improve the shielding effect is still a technical problem faced by those skilled in the art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an electrical connector with better shielding effect.

In order to achieve the above object, the present invention adopts the following technical solutions: an electrical connector, which includes several terminal modules stacked together, wherein the terminal modules include a signal terminal module and a signal terminal module. The matched grounding piece, the signal terminal module includes an insulating body and at least a pair of differential signal terminals mounted on the insulating body, the at least one pair of differential signal terminals includes a contact portion, a tail portion, and a connection between the contact portion and the the connection part of the tail, the insulating body is provided with a side surface, a groove penetrating the side surface and used to accommodate the connection part, and a metal layer located in the groove, the grounding member covers the side surface, The metal layer and the ground member together surround the connection portion.

As a further improved technical solution of the present invention, the grounding piece is a grounding piece formed by processing a metal material.

As a further improved technical solution of the present invention, the grounding sheet is provided with a shielding portion at least partially surrounding the periphery of the contact portion, and a main body portion connected with the shielding portion, the main body portion covering the side surface.

As a further improved technical solution of the present invention, the electrical connector further includes a plurality of plastic parts, the plastic parts cover the corresponding side surfaces, the grounding part is a shielding layer coated on the plastic parts, the shielding The layer is located on the side of the plastic part close to the groove.

As a further improved technical solution of the present invention, the metal layer is coated in the groove.

As a further improved technical solution of the present invention, the metal layer is in contact with the grounding member.

As a further improved technical solution of the present invention, the insulating body is provided with a first end surface and a second end surface, the groove is formed between the first end surface and the second end surface, and the groove is provided with a The first installation groove on the first end face and the second installation groove near the second end face, the signal terminal module includes a first positioning block and a second positioning block fixed on the signal terminal, the The first positioning block is installed in the first installation groove, the second positioning block is installed in the second installation groove, and the connecting part is connected to the contact part through the first installation groove and passes through the The second mounting slot is connected to the tail.

As a further improved technical solution of the present invention, the signal terminals are a pair of differential signal terminals, the pair of differential signal terminals includes a first signal terminal and a second signal terminal, and the contact portion includes a a first contact portion on the signal terminal and a second contact portion provided on the second signal terminal, the tail portion includes a first tail portion provided on the first signal terminal and a second signal terminal The second tail portion on the upper portion of the connecting portion includes a first connecting portion disposed on the first signal terminal and a second connecting portion disposed on the second signal terminal.

As a further improved technical solution of the present invention, the plurality of terminal modules are stacked along the thickness direction, the first end face of the insulating body faces the electrical connector mating direction and the second end face faces the fixing direction, the The connection direction of the electrical connector, the fixing direction and the thickness direction are perpendicular to each other, and the first installation grooves of the adjacent terminal modules are arranged in a dislocation with respect to each other in the thickness direction.

As a further improved technical solution of the present invention, the contact portion is provided with an arc-shaped contact wall extending along the mating direction of the electrical connector, and the arc-shaped contact wall is provided with a terminal accommodating cavity and an arc surrounding the terminal accommodating cavity. A curved inner surface, wherein the terminal accommodating cavity is used for inserting the butt terminal, and the arc-shaped inner surface is used for contacting with the outer surface of the butt terminal.

Compared with the prior art, the present invention forms an external shielding layer for shielding the signal terminals by arranging a metal layer located in the groove on the insulating body, and the metal layer and the grounding member together surround the connecting portion. Thus, the quality of signal transmission is improved.

Description of drawings

FIG. 1 is a schematic perspective view of an electrical connector assembly of the present invention.

FIG. 2 is a schematic perspective view of FIG. 1 from another angle.

FIG. 3 is an exploded perspective view of FIG. 1 .

FIG. 4 is a partially exploded perspective view of the first female electrical connector and the first circuit board in FIG. 3 .

FIG. 5 is a left side view of the first female housing in FIG. 4 .

FIG. 6 is a right side view of the first receptacle housing of FIG. 4 .

FIG. 7 is a right side view of the first receptacle terminal module shown in FIG. 4 after removing the first receptacle housing.

FIG. 8 is a schematic perspective view of a first female terminal module in FIG. 7 .

FIG. 9 is an exploded perspective view of FIG. 8 .

FIG. 10 is a partially exploded perspective view of the first female terminal module shown in FIG. 4 with the first female casing removed.

FIG. 11 is an exploded perspective view of FIG. 10 from another angle.

FIG. 12 is a schematic perspective view of the differential signal terminal of the first female terminal in FIG. 11 .

FIG. 13 is a front view of FIG. 12 .

FIG. 14 is a left side view of FIG. 12 .

FIG. 15 is a schematic perspective view of the second receptacle electrical connector in FIG. 3 after removing the second receptacle housing.

FIG. 16 is a left side view of FIG. 15 .

FIG. 17 is a partially exploded perspective view of FIG. 15 .

FIG. 18 is a perspective view of the adapter in FIG. 3 .

FIG. 19 is a schematic perspective view of FIG. 18 from another angle.

FIG. 20 is a left side view of FIG. 18 .

FIG. 21 is a partially exploded perspective view of FIG. 18 .

FIG. 22 is another perspective and further exploded perspective view of FIG. 21 .

Detailed ways

Referring to FIGS. 1 to 22, the present invention discloses an electrical connector assembly 400, which includes a first female electrical connector 100, a second female electrical connector 200, and a first female electrical connector 200 for communicating with the first female electrical connector. The adapter 300 of the terminal electrical connector 100 and the second female terminal electrical connector 200 . Referring to FIG. 1 , in the illustrated embodiment of the present invention, the first female electrical connector 100 has a first mounting surface 18 for mounting on the first circuit board 101 , and the second female electrical connector 100 has a first mounting surface 18 for mounting on the first circuit board 101 . The electrical connector 200 has a second mounting surface 19 for mounting on the second circuit board 201 , the first mounting surface 18 is perpendicular to the second mounting surface 19 , and the first circuit board 101 is perpendicular to the first mounting surface 19 . Two circuit boards 201 . In addition, according to the difference in terminal arrangement, the first female electrical connector 100 and the second female electrical connector 200 may also be a first male electrical connector and a second male electrical connector, respectively. The first female electrical connector 100 , the second female electrical connector 200 , the first male electrical connector and the second male electrical connector in the specific embodiment of the present invention are all referred to as electrical connectors.

Referring to FIGS. 4 to 14 , the first receptacle electrical connector 100 includes a receptacle housing 10 and a plurality of receptacle terminal modules 20 mounted on the receptacle housing 10 . The end terminal modules 20 are stacked together.

The receptacle housing 10 is provided with guide slots 102 for guiding and positioning the receptacle terminal modules 20 , circular through holes 103 and C-shaped through slots 104 , wherein the through holes 103 Two pairs form a group, and the corresponding through grooves 104 at least partially surround the periphery of each group of through holes 103 .

The structures of the plurality of female terminal modules 20 are similar, and only one group is selected for detailed description below.

Referring to FIG. 9 , the receptacle terminal module 20 includes a receptacle signal terminal module 2 and a grounding member matched with the receptacle signal terminal module 2 . In an embodiment of the present invention, the grounding member is a female terminal grounding sheet 3, which is processed and formed from a metal material, for example, stamped from a metal sheet. The receptacle signal terminal module 2 includes a receptacle insulating body 21 and a signal terminal mounted on the receptacle insulating body 21 . In an embodiment of the present invention, the signal terminals are a pair of female terminal differential signal terminals 22 . Referring to FIGS. 7 and 12 , the female terminal differential signal terminal 22 includes a female terminal contact portion 221 , and the female terminal grounding plate 3 is provided with a female terminal at least partially surrounding the outer periphery of the female terminal contact portion 221 . shield portion 31 . The female end contact portion 221 is provided with an arc-shaped contact wall 222 extending along the connection direction A-A of the electrical connector, and the arc-shaped contact wall 222 is used for contacting with a butt terminal, which may be a butt connector ( For example, the terminal of the adapter 300). The arc-shaped contact wall 222 is provided with an arc-shaped inner surface 223, and the arc-shaped inner surface 223 is used for contacting the outer surface of the mating terminal. The arc-shaped contact wall 222 defines a terminal accommodating cavity 220 for inserting the mating terminal, and the arc-shaped inner surface 223 surrounds the terminal accommodating cavity 220 .

It can be understood that, in other embodiments, the arc-shaped contact wall 222 may also be provided with an arc-shaped outer surface, and the arc-shaped outer surface is used to be inserted into the butt terminal to contact the inner surface of the butt terminal, and the same can be achieved. The purpose of the terminal contact.

Specifically, as shown in FIG. 7 and FIG. 12 , the female terminal differential signal terminal 22 includes a first signal terminal 4 and a second signal terminal 5 , and the first signal terminal 4 includes a first contact portion 41 , a first The tail portion 42 and the first connecting portion 43 connecting the first contact portion 41 and the first tail portion 42, the second signal terminal 5 includes a second contact portion 51, a second tail portion 52 and connecting the second contact part 51 and the second connecting part 53 of the second tail part 52 . The female end contact portion 221 includes the first contact portion 41 and the second contact portion 51 , and the arc-shaped contact wall 222 includes a first arc-shaped contact wall 411 located on the first contact portion 41 and There are at least two arc-shaped contact walls 511 located on the second contact portion 51 , the number of the first arc-shaped contact walls 411 is at least two and oppositely arranged, and the number of the second arc-shaped contact walls 511 is at least two and opposite set up. The terminal accommodating cavity 220 includes a first terminal accommodating cavity 2201 formed by the two first arc-shaped contact walls 411 and a second terminal accommodating cavity 2202 formed by the two second arc-shaped contact walls 511 .

The first contact portion 41 is provided with two first slots 412 located between the two first arc-shaped contact walls 411 . The two first slots 412 are connected to the first terminal receiving cavity 2201 . The first contact portion 41 has a certain elastic deformation ability, which is convenient for clamping the butt terminals and improves the contact reliability of the two. Similarly, the second contact portion 51 is provided with two second slots 512 located between the two second arc-shaped contact walls 511, and the two second slots 512 are connected to the second terminal. The accommodating cavity 2202 is connected to each other, so that the second contact portion 51 has a certain elastic deformation ability, which is convenient for clamping the butt terminals and improves the contact reliability of the two.

Of course, in other embodiments, the first arc-shaped contact wall 411 and the second arc-shaped contact wall 511 may also be one, and in this case, the first contact portion 41 and the second contact portion 51 are The cross section is roughly C-shaped, circular, oval, etc.

A first intersection 44 is provided between the first connection portion 43 and the first contact portion 41 and between the second connection portion 53 and the second contact portion 51 . A second cross portion 45 is provided between the first tail portion 42 and the second connecting portion 53 and the second tail portion 52; wherein:

The first contact portion 41 and the second contact portion 51 are aligned along the fixing direction B-B, and the first connection portion 43 and the second connection portion 53 are along the thickness of the female signal terminal module 2 The directions C-C are aligned, and the first tail portion 42 and the second tail portion 52 are aligned along the connection direction A-A of the electrical connector. In the illustrated embodiment of the present invention, the fixing direction B-B is the direction in which the first tail portion 42 and the second tail portion 52 are inserted into a circuit board (eg, the first circuit board 101 ). After the first tail portion 42 and the second tail portion 52 are inserted into the mounting holes on the circuit board, they can be fixed and electrically connected to the circuit board by soldering. The fixing direction B-B, the thickness direction C-C and the connecting direction A-A of the electrical connector are perpendicular to each other.

Referring to FIG. 7 , in the illustrated embodiment of the present invention, there are several female terminal differential signal terminals 22 of each female terminal module 20 and are arranged in a row along the fixing direction B-B. The first contact portion 41 and the second contact portion 51 of the differential signal terminal 22 are arranged in a row along the fixing direction B-B; however, the female terminal differential signal terminals 22 of the adjacent female terminal modules 20 are The first contact portion 41 and the second contact portion 51 are arranged offset from each other. Referring to FIG. 7 , the first row of female terminal differential signal terminals 22 of the female terminal module 20 in the first row on the far left and the differential signal of the female terminal in the second row of the female terminal module in the second row on the far left The terminals 22 are not aligned with each other in the thickness direction C-C to form a dislocation arrangement, and the first row of the female terminal differential signal terminals 22 of the leftmost first straight row of the female terminal module 20 that are not adjacent to the leftmost third straight row. The third row of female differential signal terminals 22 of the row of female terminal modules can be aligned with each other in the thickness direction C-C. The receptacle differential signal terminals 22 of the adjacent two receptacle terminal modules 20 are dislocated to each other, which can be matched with the twist structure of the butt terminals in the adapter 300 (to be described in detail later) to realize the first receptacle electrical connector. 100 and the 90-degree conversion structure of the female terminal differential signal terminal 22 in the female terminal module 20 of the second female terminal electrical connector 200 . In addition, crosstalk between adjacent female terminal differential signal terminals 22 can also be reduced.

Referring to FIG. 11 , the female signal terminal module 2 further includes a first positioning block 61 fixed on the first intersection 44 and a second positioning block 62 fixed on the second intersection 45 to The female terminal differential signal terminal 22 is formed as a whole.

Referring to FIG. 9 and FIG. 11 , the female terminal insulating body 21 has a first end surface 211 , a second end surface 212 and a plurality of grooves formed between the first end surface 211 and the second end surface 212 213. The groove 213 includes a first straight portion 2131 , a second straight portion 2132 and an inclined portion 2133 connecting the first straight portion 2131 and the second straight portion 2132 . In the illustrated embodiment of the present invention, the first straight portion 2131 extends along the docking direction A-A (for example, the horizontal direction), and the second straight portion 2132 extends along the fixing direction B-B (for example, the vertical direction). )extend. A metal layer 2130 is provided in the trench 213 , and each pair of female differential signal terminals 22 is located in the corresponding trench 213 . The groove 213 defines a first installation groove 2134 close to the first end surface 211 and a second installation groove 2135 close to the second end surface 212 . From another perspective, as shown in FIG. 11 , the female terminal insulating body 21 is provided with a side surface 210 , the groove 213 penetrates the side surface 210 along the thickness direction C-C, and the groove 213 is used for The first connecting portion 43 and the second connecting portion 53 are accommodated. The receptacle grounding piece 3 covers the side surface 210, and the metal layer 2130 and the receptacle grounding piece 3 together surround the first connecting portion 43 and the second connecting portion 53, so as to enhance the shielding effect and improve the The quality of signal transmission. The plurality of female terminal modules 20 are stacked along the thickness direction C-C, the first end face 211 of the female terminal insulating body 21 faces the electrical connector mating direction A-A and the second end face 212 faces the fixing direction B-B. Referring to FIG. 16 , the first installation grooves 2134 of the adjacent plurality of female terminal modules 20 are arranged staggered from each other in the thickness direction C-C. The first contact portion 41 and the second contact portion 51 of the female terminal differential signal terminal 22 are exposed from the corresponding first mounting groove 2134 . Correspondingly, the adjacent female terminal molds The first contact portion 41 and the second contact portion 51 of the female terminal differential signal terminal 22 of the group 20 are arranged offset from each other in the thickness direction C-C.

Referring to FIGS. 9 to 11 , the receptacle grounding sheet 3 further includes a main body portion 32 connected to the receptacle shielding portion 31 and extending downward from the main body portion 32 (parallel to the fixing direction B-B). a number of mounting feet 33. The female end shielding portion 31 extends from the main body portion 32 along the electrical connector mating direction A-A and partially surrounds the outer periphery of the female end contact portion 221 . The first elastic piece 311 above the contact portion 41 and the second elastic piece 312 located below the second contact portion 51 improve the reliability of mating with the mating connector.

During installation, the first positioning block 61 is installed in the first installation groove 2134 , and the second positioning block 62 is installed in the second installation groove 2135 . In this way, on the one hand, the first signal terminal 4 and the second signal terminal 5 can be installed on the female end insulating body 21; on the other hand, the first positioning block 61 and the second positioning block 62 can effectively avoid the A signal terminal 4 and a second signal terminal 5 are in contact with the metal layer 2130 . The first connecting portion 43 is connected to the first contact portion 41 through the first installation groove 2134 , and is connected to the first tail portion 42 through the second installation groove 2135 . The second connection portion 53 is connected to the second contact portion 51 through the first installation groove 2134 , and is connected to the second tail portion 52 through the second installation groove 2135 .

The main body portion 32 covers the outside of the groove 213 , and the metal layer 2130 and the main body portion 32 can provide better wrapping for the female terminal differential signal terminal 22 , thereby achieving a better shielding effect. Preferably, the metal layer 2130 is in contact with the female terminal grounding sheet 3, thereby increasing the shielding area and improving the shielding effect.

In an embodiment of the present invention, the female terminal insulating body 21 is made of plastic material, and the metal layer 2130 is coated in the groove 213 . In some embodiments, the metal layer 2130 is coated in the trench 213 by electroplating. In other embodiments, the first receptacle electrical connector 100 further includes a plurality of plastic parts, the plastic parts cover the side surfaces 210 of the corresponding receptacle insulating body 21 , and the ground parts are coated on the The shielding layer of the plastic part, the shielding layer is located on the side of the plastic part close to the groove 213 . That is, the female terminal grounding piece 3 can also be replaced by a plastic part with a shielding layer plated therewith.

In the illustrated embodiment of the present invention, the plurality of mounting feet 33 are bent and extended from the main body portion 32 to deviate from the main body portion 32 , that is, the mounting feet 33 and the main body portion 32 are not in the same location. in plane. Referring to FIG. 8 , the mounting feet 33 , the first tail portion 42 and the second tail portion 52 are all aligned along the connection direction A-A of the electrical connector (ie, arranged in a row), which is convenient for installation. onto the first circuit board 101 and can improve the shielding effect of the receptacle grounding sheet 3 on the receptacle differential signal terminal 22 .

Referring to FIGS. 15 to 17 , the second receptacle electrical connector 200 has the same or similar technical features as the first receptacle electrical connector 100 . Those skilled in the art can refer to the first receptacle electrical connector 100 . connector 100 to understand the second female electrical connector 200 . Preferably, the first receptacle electrical connector 100 and the second receptacle electrical connector 200 are the same electrical connector, but with different installation angles. In this way, the number of molds to be opened can be reduced and the cost can be reduced. For this reason, in the illustrated embodiment of the present invention, the corresponding features in the first receptacle electrical connector 100 and the second receptacle electrical connector 200 use the same reference numerals.

Referring to FIGS. 18 to 22 , the adapter 300 includes an adapter insulating body 7 , a plurality of adapter conductive terminals 8 mounted on the adapter insulating body 7 , and a plurality of adapter conductive terminals 8 . A plurality of adapter grounding pieces 9 matched with the conductive terminals 8 of the adapter.

The adapter insulating body 7 includes a first accommodating cavity 71 for mating with the first female electrical connector 100 and a second accommodating cavity 72 for mating with the second female electrical connector 200 . The adapter conductive terminal 8 includes a first butt portion 81 extending into the first receiving cavity 71 , a second abutting portion 82 extending into the second receiving cavity 72 , and a second abutting portion 82 extending into the first receiving cavity 72 . 81 and the torsion portion 83 between the second abutting portion 82 . The adapter grounding sheet 9 includes a first shielding shell 91 at least partially surrounding the periphery of the first butt portion 81 and a second shielding shell 92 at least partially surrounding the periphery of the second abutment portion 82 . After the first female electrical connector 100 and the second female electrical connector 200 are connected to the adapter 300, it can be understood that the first shielding shell 91 and the second shielding shell The body 92 is in contact with the female grounding piece 3 of the first female electrical connector 100 and the female grounding piece 3 of the second female electrical connector 200 respectively, so as to increase the grounding area and achieve better shielding effect.

Specifically, as shown in FIG. 22 , the adapter conductive terminals 8 include a plurality of adapter differential signal terminals 80 , and each pair of the adapter differential signal terminals 80 includes a first adapter signal terminal 801 and The second adaptor signal terminal 802, wherein the first adaptor signal terminal 801 and the second adaptor signal terminal 802 both include the first docking portion 81, the second docking portion 82 and the Described torsion portion 83, wherein:

The first butting portion 81 of the first adapter signal terminal 801 and the first butting portion 81 of the second adapter signal terminal 802 are arranged in the left-right direction; the first adapter signal The second abutting portion 82 of the terminal 801 and the second abutting portion 82 of the second adapter signal terminal 802 are arranged in an up-down direction.

The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. The understanding of this specification should be based on those skilled in the art, such as "front", "rear", "left", " Directional descriptions such as "right", "up", "down", etc., although this specification has described the present invention in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that those skilled in the art The present invention can still be modified or equivalently replaced, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included within the scope of the claims of the present invention.

Claims (10)

1. An electrical connector (100, 200) comprising a plurality of terminal modules (20) stacked together, characterized in that: the terminal module (20) comprises a signal terminal module (2) and a grounding piece matched with the signal terminal module (2), the signal terminal module (2) comprises an insulating body (21) and signal terminals installed on the insulating body (21), each signal terminal comprises a contact part (221), a tail part (42, 52) and a connecting part (43, 53) for connecting the contact part (221) and the tail part (42, 52), the insulating body (21) is provided with a side surface (210), a groove (213) penetrating through the side surface (210) and used for accommodating the connecting parts (43, 53) and a metal layer (2130) located in the groove (213), the grounding piece covers the side surface (210), and the metal layer (2130) and the grounding piece jointly encircle the connecting parts (43, 53).

2. The electrical connector (100, 200) of claim 1, wherein: the grounding piece is a grounding sheet (3) which is formed by processing metal materials.

3. The electrical connector (100, 200) of claim 2, wherein: the grounding sheet (3) is provided with a shielding part (31) at least partially surrounding the periphery of the contact part (221) and a main body part (32) connected with the shielding part (31), and the main body part (32) covers the side surface (210).

4. The electrical connector (100, 200) of claim 1, wherein: the electric connector (100, 200) further comprises a plurality of plastic parts, the plastic parts cover the corresponding side surfaces (210), the grounding part is a shielding layer coated on the plastic parts, and the shielding layer is positioned on one side, close to the groove (213), of the plastic parts.

5. The electrical connector (100, 200) of claim 1, wherein: the metal layer (2130) is coated in the groove (213).

6. The electrical connector (100, 200) of claim 1, wherein: the metal layer (2130) is in contact with the ground.

7. The electrical connector (100, 200) of claim 1, wherein: the insulation body (21) is provided with a first end face (211) and a second end face (212), the groove (213) is formed between the first end face (211) and the second end face (212), the groove (213) is provided with a first mounting groove (2134) close to the first end face (211) and a second mounting groove (2135) close to the second end face (212), the signal terminal module (2) comprises a first positioning block (61) and a second positioning block (62) which are fixed on the signal terminal, the first positioning block (61) is mounted in the first mounting groove (2134), the second positioning block (62) is mounted in the second mounting groove (2135), and the connecting parts (43, 53) are connected with the contact part (221) through the first mounting groove (2134) and connected with the tail part (42, b) through the second mounting groove (2135), 52).

8. The electrical connector (100, 200) of claim 7, wherein said signal terminals are a pair of differential signal terminals (22), the pair of differential signal terminals (22) includes a first signal terminal (4) and a second signal terminal (5), the contact portion (221) includes a first contact portion (41) provided on the first signal terminal (4) and a second contact portion (51) provided on the second signal terminal (5), the tail portions (42, 52) including a first tail portion (42) provided on the first signal terminal (4) and a second tail portion (52) provided on the second signal terminal (5), the connecting portion (43, 53) includes a first connecting portion (43) provided on the first signal terminal (4) and a second connecting portion (53) provided on the second signal terminal (5).

9. The electrical connector (100, 200) of claim 7, wherein: the plurality of terminal modules (20) are stacked in a thickness direction (C-C), the first end face (211) of the insulating body (21) faces an electrical connector butting direction (A-A) and the second end face (212) faces a fixing direction (B-B), the electrical connector butting direction (A-A), the fixing direction (B-B) and the thickness direction (C-C) are perpendicular to each other, and the first mounting grooves (2134) of the plurality of adjacent terminal modules (20) are arranged in a staggered mode in the thickness direction (C-C).

10. The electrical connector (100, 200) of claim 9, wherein: the contact portion (221) is provided with an arc-shaped contact wall (222) extending along the mating direction (a-a) of the electrical connector, the arc-shaped contact wall (222) is provided with a terminal receiving cavity (220) and an arc-shaped inner surface (223) surrounding the terminal receiving cavity (220), wherein the terminal receiving cavity (220) is used for inserting a mating terminal, and the arc-shaped inner surface (223) is used for contacting with the outer surface of the mating terminal.

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