Electrical connector assembly and first and second connectors thereof

Abstract

An electrical connector assembly includes a first connector and a second connector that mat with each other. The first connector includes a first insulating body, at least one row of first signal terminal pairs, and a plurality of first shielding members, each first shielding member surrounding the outer periphery of a corresponding first signal terminal pair. The second connector includes a body, an insulating base fixed to the body, at least one row of second signal terminal pairs held in the insulating base, and a plurality of second shielding members. Each second shielding member includes a U-shaped body, the U-shaped body surrounding three sides of a corresponding second signal terminal pair and having an open side; the body is made of conductive plastic, and the body has a plurality of shielding walls, each shielding wall shielding the open side of the corresponding U-shaped body and together with the U-shaped body surrounding the outer periphery of the second signal terminal pair. When engaged, the second signal terminal pairs are electrically connected to the corresponding first signal terminal pairs. Furthermore, the present invention also provides a first connector and a second connector.

Description

Technical Field

[0001] The present invention relates to an electrical connector assembly and a first connector and a second connector thereof. Background Technology

[0002] Existing high-speed electrical connectors typically feature a metal shield around the periphery of each differential signal terminal pair to suppress crosstalk between adjacent differential pairs. However, due to limitations in metal forming and assembly processes, the metal shield often cannot completely cover the periphery of the signal terminal pair. Parts of the signal terminal pair are exposed due to shielding gaps, and crosstalk can still easily occur between adjacent differential pairs, leading to a decrease in signal integrity and failing to meet the requirements of high-speed differential signal transmission. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an electrical connector assembly that can eliminate shielding gaps and improve signal integrity of high-speed differential signal transmission.

[0004] To address the aforementioned problems, the present invention provides a technical solution: an electrical connector assembly comprising a first connector and a second connector mating with each other; the first connector includes a first insulating body, at least one row of first signal terminal pairs fixed to the first insulating body, and a plurality of first shielding members, each of the first shielding members surrounding the outer periphery of a corresponding first signal terminal pair; the second connector includes a body, an insulating base fixed to the body, at least one row of second signal terminal pairs fixed to the insulating base, and a plurality of second shielding members; each of the second shielding members includes a U-shaped body, the U-shaped body surrounding three sides of a corresponding second signal terminal pair and having an open side; the body is made of conductive plastic, and the body has a plurality of shielding walls, each of the shielding walls shielding the open side of a corresponding U-shaped body and together with the U-shaped body surrounding the outer periphery of the corresponding second signal terminal pair; when the first connector and the second connector are engaged, each second signal terminal pair is electrically connected to the corresponding first signal terminal pair.

[0005] To address the aforementioned problems, the present invention provides another technical solution: a first connector, comprising a first insulating body, at least one row of first signal terminal pairs fixed to the first insulating body, and a plurality of first shielding members, each of the first shielding members surrounding the outer periphery of a corresponding first signal terminal pair; each of the first shielding members includes a U-shaped metal member and a metal plate, the U-shaped metal member surrounding three sides of the corresponding first signal terminal pair and having an open side, the metal plate being welded and fixed to the U-shaped metal member and closing the open side.

[0006] To address the aforementioned problems, the present invention provides another technical solution: a second connector, comprising a body, an insulating base fixed to the body, and at least one row of second signal terminal pairs and a plurality of second shielding members held in the insulating base; each second shielding member includes a U-shaped body, the U-shaped body surrounding three sides corresponding to a second signal terminal pair and having an open side; the body is made of conductive plastic, and the body is provided with a plurality of shielding walls, each shielding wall shielding the open side corresponding to a U-shaped body, and together with the U-shaped body, surrounding the outer periphery of the corresponding second signal terminal pair.

[0007] In this invention, the second shielding component is a U-shaped body surrounding three sides of the second signal terminal pair, which can be formed by stamping and bending, thus avoiding the process limitations of metal shielding components that cannot completely cover the signal terminal pair. The body is made of conductive plastic and has a shielding wall. With the freedom of injection molding, the shielding wall can cover the open side of the U-shaped body in places where it is difficult to form or extend a metal component. As a result, the outer periphery of each second signal terminal pair is jointly surrounded by the U-shaped body and the shielding wall, forming a roughly closed circumferential shielding boundary. The second signal terminal pair is no longer partially exposed, the coupling between adjacent differential pairs is blocked, near-end and far-end crosstalk is reduced, and the signal integrity of high-speed differential signal transmission is improved.

[0008] In this invention, each first shielding component is formed by welding a U-shaped metal part to a metal plate: the U-shaped metal part can be formed by stamping and bending, and the open side left due to the limited forming is closed by welding the metal plate, so that the outer periphery of the first signal terminal pair is also completely covered, eliminating the shielding gap.

[0009] In addition, multiple shielding walls are integrally injection molded with the main body, eliminating the need for separate enclosed metal shielding for each second signal terminal pair, which simplifies manufacturing and assembly. Attached Figure Description

[0010] Figure 1 This is a perspective view of an electrical connector assembly in a mating state according to an embodiment of the present invention.

[0011] Figure 2 for Figure 1 The electrical connector assembly shown is a cross-sectional view along line II-II.

[0012] Figure 3 for Figure 1 The diagram shows a three-dimensional view of the electrical connector assembly in the disassembled state.

[0013] Figure 4 for Figure 3 A 3D view of the second connector.

[0014] Figure 5 for Figure 4The second connector shown is a partial 3D view after being sectioned along line VV.

[0015] Figure 6 for Figure 4 A partial perspective view of the insulating base and the second signal terminal of the second connector shown.

[0016] Figure 7 for Figure 4 A perspective view of a second shield in the second connector shown.

[0017] Figure 8 for Figure 3 A three-dimensional view of the first connector from another angle.

[0018] Figure 9 for Figure 8 The first connector shown is a partial perspective view after being cut along line IX-IX.

[0019] Explanation of key component symbols: Electrical connector assembly: 100; Cable: 200; First connector: 10; First insulating body: 11; Insulating part: 111; Conductive plastic part: 112; First signal terminal pair: 12; First signal terminal: 120; First retaining part: 121; First elastic arm: 122; First contact part: 123; Tail part: 124; First shielding component: 13; U-shaped metal component: 131; Metal plate: 132; Insulating housing: 14; Grounding plate: 15; Top cover: 16; Locking fastener: 17; Stress relief component: 18; Pull strap: 19; Second connector: 20; Body: 21; Shielding wall: 211; Mutation cavity: 212; Insulating base: 22; Second signal terminal pair: 23; Second signal terminal: 230; Second retaining part: 231; Connecting part: 232; Soldering foot: 233; Second shielding component: 24; U-shaped body: 241; Side wall: 2411; Connecting wall: 2412; Flexible arm: 242; Connecting foot: 243; Fixed foot: 244; Metal casing: 25; Docking direction: A; First direction: B; Second direction: C. Detailed Implementation

[0020] The technical solutions of the present invention will now be described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Please see Figures 1 to 3 The electrical connector assembly 100 of this embodiment includes a first connector 10 and a second connector 20, which are pluggably connected along the mating direction A. In this embodiment, the first connector 10 is a wire-end connector, which terminates multiple cables 200; the second connector 20 is a board-end connector, used for mounting to a circuit board (not shown). For ease of description, the following definitions apply: along the mating direction A, the side of the second connector 20 facing the first connector 10 is the upper side, and the opposite side is the lower side. The terms "upper edge," "lower edge," "upward," "downward," "higher than," and "lower than" used herein are all based on this; the arrangement direction of each row of first signal terminal pairs 12 is the first direction B; the direction perpendicular to the mating direction A and the first direction B is the second direction C.

[0022] Please see Figure 2 , Figure 8 as well as Figure 9 The first connector 10 includes a first insulating body 11, at least one row of first signal terminal pairs 12 fixed to the first insulating body 11, and a plurality of first shielding members 13, each first shielding member 13 surrounding the outer periphery of a corresponding first signal terminal pair 12. In this embodiment, there are two rows of first signal terminal pairs 12, which are spaced apart along a second direction C; correspondingly, there are two first insulating bodies 11, which are spaced apart along the second direction C, and each row of first signal terminal pairs 12 is fixed to a corresponding first insulating body 11. In other possible embodiments, the first signal terminal pairs 12 may also be one or more rows, and the number of first insulating bodies 11 may be correspondingly set; the two rows of first signal terminal pairs 12 may also be fixed to the same first insulating body 11.

[0023] Each first signal terminal pair 12 consists of two first signal terminals 120 arranged side by side along a first direction B, used to transmit a pair of differential signals. Each first signal terminal 120 includes a first retaining portion 121, a first elastic arm 122 extending downward from the first retaining portion 121, and a tail portion 124 located at the upper end. The first elastic arm 122 is provided with a first contact portion 123, which may be in the shape of an outwardly convex arc. The tail portion 124 is soldered and fixed to the signal conductor of the corresponding cable 200. The cable 200 may be a differential biaxial cable, which includes two signal conductors and a shielding layer covering the outer periphery. The two signal conductors are respectively connected to the two tail portions 124 of the same first signal terminal pair 12.

[0024] Each first insulating body 11 includes an insulating portion 111 and a conductive plastic portion 112. The conductive plastic portion 112 is bonded to the insulating portion 111 through a two-stage molding process: firstly, the insulating portion 111 is injection molded from insulating material, and the first holding portion 121 of a corresponding row of first signal terminal pairs 12 is molded and held within the insulating portion 111, i.e., the first signal terminal pairs 12 are held in the insulating portion 111; then, conductive plastic is injection molded a second time at a predetermined position in the insulating portion 111, so that the conductive plastic portion 112 and the insulating portion 111 are interlocked and bonded together as one unit, without the need for separate assembly. The conductive plastic is, for example, an injection-moldable material formed by mixing conductive fillers such as carbon fiber, carbon black, metal fiber, or metal powder into an insulating resin substrate, combining the molding freedom and conductivity of plastics.

[0025] Each first shielding element 13 includes a U-shaped metal element 131 and a metal plate 132. The U-shaped metal element 131 is formed by stamping and bending a sheet metal, and is disposed on three sides of the corresponding first signal terminal pair 12, having an open side; the metal plate 132 is welded and fixed to the U-shaped metal element 131 and closes the open side. Thus, the U-shaped metal element 131 and the metal plate 132 together form a circumferentially closed shielding cavity on the outer periphery of the corresponding first signal terminal pair 12, and the first elastic arm 122 and the first contact portion 123 are located within the shielding cavity. Further, a plurality of U-shaped metal elements 131 corresponding to the same row of first signal terminal pairs 12 are arranged along the first direction B and welded and fixed to the same metal plate 132; in other words, each first shielding element 13 in the row shares the same metal plate 132 extending along the first direction B, and the metal plate 132 simultaneously constitutes the metal plate of each first shielding element 13 in the row. In this way, a single metal plate 132 can seal the open sides of the multiple U-shaped metal parts 131 in the row. Each U-shaped metal part 131 is electrically connected to each other through the metal plate 132 to form a shielded row with continuous equipotential along the first direction B. Compared with configuring a metal plate for each U-shaped metal part 131 separately, the number of parts and welding processes are reduced.

[0026] In this embodiment, the conductive plastic portion 112 is disposed at a predetermined position on the insulating portion 111, for example, at a position where the U-shaped metal piece 131 and the metal plate 132 are difficult to completely cover the corresponding first signal terminal pair 12 due to molding or assembly limitations, and abuts against the corresponding U-shaped metal piece 131, that is, against the inner wall of the U-shaped metal piece 131. In this way, by means of the injection molding properties of the conductive plastic, the shielding medium can be extended to areas that are inconvenient for the metal piece to reach, further reducing the shielding gaps around the first signal terminal pair 12; and the conductive plastic portion 112 and the U-shaped metal piece 131 are in contact and electrically connected, with their potentials being the same, together forming the shielding boundary around the first signal terminal pair 12.

[0027] The first connector 10 also includes at least one ground plane 15. In this embodiment, there are two ground planes 15, each extending along the first direction B and welded to a plurality of first shielding members 13 corresponding to the same row of first signal terminal pairs 12. The first shielding members 13 in this row are further connected to a common ground, shortening the grounding loop. The shielding layer of the cable 200 can be electrically connected to the ground plane 15, the metal plate 132 and / or the U-shaped metal member 131, so that the shielding layer of the cable 200 shares a common ground with the first shielding members 13, thus achieving the continuation of the wire-end grounding network.

[0028] In addition, please see Figure 2 , Figure 3 and Figure 8 The first connector 10 may also include an insulating housing 14, a top cover 16 and a locking element 17 assembled on the insulating housing 14, and a stress relief element 18 formed over the cable 200 lead-out area. Two first insulating bodies 11, together with corresponding first signal terminal pairs 12, cables 200 and first shielding elements 13, are assembled and housed in the insulating housing 14; the top cover 16 covers the multiple cables 200, the locking element 17 is used to lock with the mating side, and the stress relief element 18 is used to disperse the bending and pulling stress on the cables 200; a pull strap 19 for easy unlocking and removal may also be assembled on the top cover 16.

[0029] The assembly process of the first connector 10 can be as follows: weld and fix multiple U-shaped metal parts 131 in the same row to the metal plate 132 to form a metal part assembly; weld and fix the signal conductor of the cable 200 to the tail 124 of the first signal terminal 120 held in the first insulating body 11; assemble the welded metal part assembly on the outer periphery of the first insulating body 11, so that each U-shaped metal part 131 surrounds the corresponding first signal terminal pair 12, and the conductive plastic part 112 abuts against the corresponding U-shaped metal part 131; weld the ground plane 15 to form a row of terminal cable modules; assemble the locking part 17 into the insulating shell 14, assemble the two rows of terminal cable modules into the insulating shell 14, then assemble the top cover 16, cover and mold the stress relief part 18, and finally assemble the pull strap 19.

[0030] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7The second connector 20 includes a body 21, an insulating base 22 fixed to the body 21, at least one row of second signal terminal pairs 23 held in the insulating base 22, and a plurality of second shielding members 24. In this embodiment, the second signal terminal pairs 23 are arranged in two rows, with the two rows of second signal terminal pairs 23 spaced apart along the second direction C and jointly held in the insulating base 22, corresponding one-to-one with the two rows of first signal terminal pairs 12 of the first connector 10; the plurality of second signal terminal pairs 23 in each row are arranged along the first direction B. Each second signal terminal pair 23 is composed of two second signal terminals 230 arranged side by side along the first direction B. Each second signal terminal 230 includes a second holding portion 231 held in the insulating base 22, a mating portion 232 extending upward from the second holding portion 231 out of the insulating base 22, and a soldering foot 233 extending downward out of the insulating base 22; the end of the mating portion 232 forms the upper edge of the second signal terminal 230, and the soldering foot 233 is used for soldering and fixing to the circuit board. In this embodiment, the second signal terminal pair 23 is fixed to the insulating base 22 by insert injection molding.

[0031] The body 21 is made of conductive plastic, such as the aforementioned injection-molded material mixed with conductive filler. The body 21 is generally frame-shaped, forming an upward-opening mating cavity 212 for accommodating the mating end portion of the first connector 10. The body 21 is provided with multiple shielding walls 211 located within the mating cavity 212. The shielding walls 211 are integrally injection-molded with the body 21, and each shielding wall 211 corresponds to a second shielding member 24. The shielding wall 211 may be a portion of the peripheral wall of the body 21, a wall protruding from the wall surface of the body 21, or a partition wall located within the mating cavity 212.

[0032] Please see Figure 7 Each second shielding member 24 is formed by stamping and bending a metal sheet, and includes a U-shaped body 241, multiple elastic arms 242, two connecting feet 243, and a fixing foot 244. The U-shaped body 241 includes two sidewalls 2411 arranged opposite each other along the first direction B and a connecting wall 2412 connecting the two sidewalls 2411, thereby surrounding three sides of a corresponding second signal terminal pair 23 and having an open side, the open side being opposite to the connecting wall 2412. Please refer to... Figure 2 and Figure 5After the insulating base 22, together with the second signal terminal pair 23 and the second shielding member 24, is assembled into the body 21, each shielding wall 211 faces and shields the open side of the corresponding U-shaped body 241, and together with the U-shaped body 241, surrounds the outer periphery of the corresponding second signal terminal pair 23, forming a generally closed circumferential shielding boundary. In some possible embodiments, the U-shaped body 241 is in direct contact with the body 21 and is electrically conductive. For example, the outer surfaces of the sidewalls 2411 and / or connecting walls 2412 are in contact with the corresponding wall surfaces of the body 21, so that each second shielding member 24 and the conductive plastic body 21 form an equipotential shielding network. In other possible embodiments, the body 21 may also use conductive plastic only in the area forming the shielding wall 211 and its adjacent area.

[0033] Please see Figure 2 and Figure 7 Multiple elastic arms 242 extend upward from the upper edge of the U-shaped body 241. In this embodiment, elastic arms 242 extend upward from the upper edges of the two sidewalls 2411 and the upper edge of the connecting wall 2412, and the end of each elastic arm 242 can form an outwardly protruding arc-shaped contact edge. When the first connector 10 and the second connector 20 are engaged, the elastic arm 242 elastically abuts against the corresponding first shield 13, specifically, the arc-shaped contact edge abuts against the outer wall surface of the U-shaped metal part 131 or the metal plate 132 to form a line contact. Compared with point contact achieved by stamping protrusions, the contact area of ​​the line contact is continuously extended, the contact area is larger, the contact impedance is lower, and it is less affected by assembly tolerances and micro-movements. The conduction quality of the overlap between the line end and the plate end shield is more stable. In addition, multiple elastic arms 242 abut against the corresponding first shield 13 from different sides to form a multi-sided redundant overlap, and play a guiding role for the first shield 13 during the docking process, further improving the reliability of the shield overlap.

[0034] Please see Figure 2Along the mating direction A, the upper edge of each second signal terminal 230 is higher than the upper edge of the corresponding U-shaped body 241 and lower than the upper edge of the corresponding elastic arm 242. Thus, during the mating process, the elastic arm 242 first engages with the first shield 13, establishing the grounding and shielding path first. Subsequently, the mating part 232 enters the shielding cavity of the corresponding first shield 13 and elastically abuts against the first contact part 123 of the first signal terminal 120 for electrical connection. That is, grounding precedes signal conduction, which is beneficial for providing shielding and discharge protection for the signal terminals during insertion and removal. When the first connector 10 and the second connector 20 are fully engaged, the upper edge of each U-shaped body 241 and the lower edge of the corresponding first shield 13 are flush with each other (the term "flush" herein refers to deviations within manufacturing and assembly tolerances). Thus, the shielding ranges provided by the first shield 13 and the second shield 24 are approximately continuous in the docking direction A, avoiding any interruption in shielding along the docking direction A at the docking interface; the elastic arm 242 crosses this connection position and overlaps the first shield 13, further electrically bridging the two shields, so that the shielding circuit is directly closed near the signal contact.

[0035] Please see Figure 7 Two connecting feet 243 extend downward from the lower edges of the two side walls 2411, respectively. In the same row, two adjacent connecting feet 243 of two adjacent second shielding members 24 are connected to each other; in this embodiment, they abut against each other and are electrically connected. In other possible embodiments, they can also be welded or integrally connected during stamping. In this way, multiple second shielding members 24 in the same row are connected in series via connecting feet 243 to form an equipotential shielding array, avoiding coupling between adjacent shielding members due to potential differences and shortening the grounding loop. In some possible embodiments, the connecting feet 243 also extend downward to form an insulating base 22, which is used for welding to the grounding part of the circuit board and also serves as the grounding solder foot of the second shielding member 24. A fixing foot 244 is provided on the connecting wall 2412. In this embodiment, it extends downward from the lower edge of the connecting wall 2412 and is inserted into the insulating base 22 to fix the second shielding member 24 to the insulating base 22. That is, the fixed foot 244 is located on one side of the U-shaped body 241, and the two connecting feet 243 are located on the other opposite sides of the U-shaped body 241.

[0036] The assembly process of the second connector 20 can be as follows: the second signal terminal pair 23 is fixed to the insulating base 22 by insert injection molding; multiple second shielding members 24 are assembled on the insulating base 22 from top to bottom, each fixing pin 244 is inserted into the insulating base 22, and adjacent connecting pins 243 are connected to each other to form a terminal module; the terminal module is assembled and fixed to the body 21, so that the open side of each U-shaped body 241 is directly opposite the corresponding shielding wall 211; finally, a metal shell 25 can be assembled on the outer periphery of the body 21. The metal shell 25 surrounds the outer periphery of the body 21, providing overall electromagnetic shielding and mechanical protection, and can be locked with the locking member 17 of the first connector 10.

[0037] The first shielding component 13, the second shielding component 24, and the ground plane 15 can be formed by stamping from metal sheets such as phosphor bronze, brass, or stainless steel, and the surface can be plated with nickel, tin, or gold. The first signal terminal 120 and the second signal terminal 230 can be made of a high-elasticity copper alloy, and a selective gold plating layer can be provided in the contact area. The insulating housing 14, the insulating part 111, and the insulating base 22 can be made of high-temperature thermoplastic materials such as liquid crystal polymers and polyphenylene sulfide. The above materials are only examples and do not constitute limitations.

[0038] In this invention, the board end is surrounded by a U-shaped body 241 and a conductive plastic body 21 with a shielding wall 211, which together form the outer periphery of the second signal terminal pair 23. The wire end is surrounded by a U-shaped metal piece 131 welded to a metal plate 132 and supplemented by a conductive plastic part 112 supporting the U-shaped metal piece 131. During docking, the shielding bodies on both sides are connected flush and bridged by line contact via an elastic arm 242. The shielding components in the same row are interconnected and grounded via the metal plate 132, the grounding plate 15, and the connecting feet 243. Thus, each differential pair is within a roughly closed and equipotential shielding boundary at the wire end, board end, and docking interface. The partial exposure of the signal terminal pair caused by shielding gaps is eliminated, crosstalk between adjacent differential pairs is significantly reduced, and the signal integrity of high-speed differential signal transmission is improved.

[0039] In summary, the above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the present invention should still fall within the scope of the patent of the present invention.

Claims

1. An electrical connector assembly comprising a first connector and a second connector mating with each other; The first connector includes a first insulating body, at least one row of first signal terminal pairs held in the first insulating body, and a plurality of first shielding members, each of the first shielding members surrounding the outer periphery of a corresponding first signal terminal pair; The second connector includes a body, an insulating base fixed to the body, at least one row of second signal terminal pairs held in the insulating base, and a plurality of second shielding components; Its features are: Each of the second shielding components includes a U-shaped body, which surrounds three sides corresponding to a second signal terminal pair and has an open side; the body is made of conductive plastic and has multiple shielding walls, each shielding wall shielding the open side corresponding to a U-shaped body and together with the U-shaped body surrounding the outer periphery of the corresponding second signal terminal pair; when the first connector and the second connector are engaged, each second signal terminal pair is electrically connected to the corresponding first signal terminal pair.

2. The electrical connector assembly as claimed in claim 1, characterized in that, Each of the second shielding members further includes at least one elastic arm that extends upward from the upper edge of the U-shaped body; when the first connector and the second connector are engaged, the elastic arm elastically abuts against the corresponding first shielding member.

3. The electrical connector assembly as claimed in claim 1, characterized in that, When the first connector engages with the second connector, the upper edge of each U-shaped body is flush with the lower edge of the corresponding first shield.

4. A first connector, comprising a first insulating body, at least one row of first signal terminal pairs fixed to the first insulating body, and a plurality of first shielding members, each of the first shielding members surrounding the outer periphery of a corresponding first signal terminal pair; characterized in that: Each of the first shielding components includes a U-shaped metal component and a metal plate. The U-shaped metal component surrounds three sides of the corresponding first signal terminal pair and has an open side. The metal plate is welded and fixed to the U-shaped metal component and closes the open side.

5. The first connector as described in claim 4, characterized in that, Multiple U-shaped metal parts corresponding to the first signal terminal pairs in the same row are welded and fixed to the same metal plate.

6. The first connector as claimed in claim 5, characterized in that, The first insulating body includes an insulating portion and a conductive plastic portion formed in a secondary mold and bonded to the insulating portion. The first signal terminal pair is fixed to the insulating portion, and the conductive plastic portion abuts against the corresponding U-shaped metal part.

7. The first connector as claimed in claim 4, characterized in that, The first connector further includes at least one ground plane, each of which is welded to a plurality of first shielding members corresponding to the same row of first signal terminal pairs.

8. A second connector, comprising a body, an insulating base fixed to the body, and at least one row of second signal terminal pairs and a plurality of second shielding members held in the insulating base; characterized in that: Each of the second shielding components includes a U-shaped body, which surrounds three sides corresponding to a second signal terminal pair and has an open side; the body is made of conductive plastic and has multiple shielding walls, each shielding wall shielding the open side corresponding to a U-shaped body and together with the U-shaped body, surrounding the outer periphery of the corresponding second signal terminal pair.

9. The second connector as claimed in claim 8, characterized in that, Each of the second shielding members further includes at least one elastic arm extending upward from the upper edge of the U-shaped body; the upper edge of each of the second signal terminals in the second signal terminal pair is higher than the upper edge of the U-shaped body and lower than the upper edge of the elastic arm.

10. The second connector as claimed in claim 9, characterized in that, Each of the second shielding components further includes two connecting feet; the U-shaped body includes two oppositely arranged sidewalls and a connecting wall connecting the two sidewalls, and the two connecting feet extend downward from the lower edge of the two sidewalls respectively; the two adjacent connecting feet of two adjacent second shielding components are connected to each other.

11. The second connector as claimed in claim 10, characterized in that, Each of the second shielding components further includes a fixing foot, which is disposed on the connecting wall and inserted into the insulating base.

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