Backplane Connector Assemblies

Abstract

A backplane connector assembly includes a first backplane connector and a second backplane connector. The first backplane connector includes a plurality of first conductive terminals, a first insulating bracket, a first metal shielding sheet, a second metal shielding sheet, and a shielding cavity. The second backplane connector includes a second terminal module, the second terminal module includes a docking terminal docking with the first conductive terminal and a shielding shell surrounding the docking terminal, the shielding shell being accommodated in the shielding cavity. Compared with the prior art, the backplane connector assembly of the present invention reduces crosstalk and improves the quality of signal transmission.

Description

[0001] The present invention claims the priority of Chinese patent application with application date of June 19, 2020, application number 202010567796.4, and invention name “Backplane Connector Assembly”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The invention relates to a backplane connector assembly and belongs to the technical field of connectors. Background Art

[0003] Existing backplane connector assemblies generally include a male connector and a female connector. The male connector generally includes a male housing and a plurality of male terminal modules mounted on the male housing. Each male terminal module includes an insulating frame, a plurality of male conductive terminals embedded in the insulating frame, and a first metal shielding sheet mounted on at least one side of the insulating frame. The female connector generally includes a female housing and a plurality of female terminal modules mounted on the female housing. Each female terminal module includes an insulating frame, a plurality of female conductive terminals embedded in the insulating frame, and a second metal shielding sheet mounted on at least one side of the insulating frame.

[0004] When the male connector and the female connector are matched, the male conductive terminal and the female conductive terminal are in contact, and the first metal shielding sheet and the second metal shielding sheet are plugged into each other.

[0005] However, as the signal transmission requirements of high-speed connectors continue to increase, there is still room for improvement in the shielding of differential signal terminals in existing backplane connector assemblies. Summary of the invention

[0006] The object of the present invention is to provide a backplane connector assembly with better shielding effect.

[0007] To achieve the above object, the present invention adopts the following technical solution: a backplane connector assembly, comprising a first backplane connector and a second backplane connector matched with the first backplane connector, wherein the first backplane connector comprises a first terminal module, and the first terminal module comprises:

[0008] A plurality of first conductive terminals, wherein the first conductive terminals include a first connecting portion and a first contact portion;

[0009] A first insulating bracket, wherein the first insulating bracket is fixed on the first connecting portion;

[0010] A first metal shielding sheet, wherein the first metal shielding sheet is provided with a first extending portion; and

[0011] A second metal shielding sheet, wherein the second metal shielding sheet is provided with a second extension portion;

[0012] The first conductive terminal includes a first differential signal terminal, a first ground terminal and a second ground terminal, wherein the first differential signal terminal is located between the first ground terminal and the second ground terminal;

[0013] The second backplane connector includes a second terminal module, and the second terminal module includes a docking terminal docking with the first differential signal terminal;

[0014] The first extension portion, the second extension portion, the first contact portion of the first ground terminal, and the first contact portion of the second ground terminal form a shielding cavity, and the first contact portion of the first differential signal terminal is located in the shielding cavity;

[0015] The second terminal module further includes a shielding shell surrounding the periphery of the butt terminal, and the shielding shell is accommodated in the shielding cavity.

[0016] As a further improved technical solution of the present invention, the shielding shell includes a first side wall, a second side wall, a third side wall and a fourth side wall connected in sequence, wherein the first side wall and the third side wall are arranged face to face, the second side wall and the fourth side wall are arranged face to face, and the first side wall, the second side wall, the third side wall and the fourth side wall form a hollow cylindrical portion.

[0017] As a further improved technical solution of the present invention, the ends of the first side wall, the second side wall, the third side wall and the fourth side wall are provided with deflection parts bent inwardly, and these deflection parts are separated from each other, and the deflection parts are used to guide the shielding shell to be inserted into the shielding cavity.

[0018] As a further improved technical solution of the present invention, the second terminal module includes a second insulating bracket, a plurality of second conductive terminals embedded in the second insulating bracket, a third metal shielding sheet fixed to one side of the second insulating bracket, and a fourth metal shielding sheet fixed to the other opposite side of the second insulating bracket, and the second conductive terminals include the docking terminal, the third grounding terminal and the fourth grounding terminal;

[0019] The shielding shell includes a first extension piece extending from the first side wall and first slots located on both sides of the first extension piece; the shielding shell also includes a second extension piece extending from the third side wall and second slots located on both sides of the second extension piece;

[0020] The first extending piece and the second extending piece are in contact with the third grounding terminal and the fourth grounding terminal respectively;

[0021] The first slot and the second slot located on the same side of the first extension piece and the second extension piece are used to clamp the third metal shielding piece, and the first slot and the second slot located on the other same side of the first extension piece and the second extension piece are used to clamp the fourth metal shielding piece.

[0022] As a further improved technical solution of the present invention, the second terminal module also includes an insulator sleeved on the butt terminal, and the shielding shell is sleeved on the insulator.

[0023] As a further improved technical solution of the present invention, the second backplane connector includes a second shell, the second shell includes a base and a plurality of insulating protrusions extending integrally from the base and arranged at intervals; the docking terminal includes a first signal terminal and a second signal terminal; the insulating protrusion is provided with a first terminal receiving hole for accommodating the first signal terminal and a second terminal receiving hole for accommodating the second signal terminal.

[0024] As a further improved technical solution of the present invention, the base is also provided with a terminal accommodating groove connected to the first terminal accommodating hole and the second terminal accommodating hole; the second shell is also provided with a partition portion for separating the first terminal accommodating hole from the second terminal accommodating hole; the second terminal module includes an insulating block fixed on the first signal terminal and the second signal terminal, and the insulating block is accommodated in the terminal accommodating groove; the top surface of the insulating block presses against the bottom surface of the partition portion to achieve limiting.

[0025] As a further improved technical solution of the present invention, the shielding shell also includes an installation portion extending from the cylindrical portion, the installation portion includes a connecting portion, a first bent portion bent from one side of the connecting portion, and a second bent portion bent from the other opposite side of the connecting portion, wherein: the connecting portion is connected to the third side wall, the first bent portion and the second side wall are located on the same side, and the second bent portion and the fourth side wall are located on the same side; the connecting portion is coplanar with the third side wall, the first bent portion protrudes outward from the second side wall, and the second bent portion protrudes outward from the fourth side wall.

[0026] As a further improved technical solution of the present invention, the base is provided with a positioning groove surrounding a portion of the insulating protrusion, and the first bending portion, the second bending portion and the connecting portion are positioned in the positioning groove.

[0027] As a further improved technical solution of the present invention, the mounting portion is provided with a retaining portion which presses against the insulating block to limit the insulating block from downwardly escaping from the terminal accommodating groove.

[0028] As a further improved technical solution of the present invention, a plurality of first barb portions are provided on a side of the first bending portion away from the third side wall, and a plurality of second barb portions are provided on a side of the second bending portion away from the third side wall, and the first barb portions and the second barb portions are used to be clamped in the second shell.

[0029] As a further improved technical solution of the present invention, the first extension portion is provided with a first protrusion protruding toward the first ground terminal and a second protrusion protruding toward the second ground terminal;

[0030] The second extension portion is provided with a third protrusion protruding toward the first ground terminal and a fourth protrusion protruding toward the second ground terminal;

[0031] The first protrusion and the third protrusion respectively contact two opposite side surfaces of the first contact portion of the first grounding terminal, and the second protrusion and the fourth protrusion respectively contact two opposite side surfaces of the first contact portion of the second grounding terminal to form the shielding cavity.

[0032] As a further improved technical solution of the present invention, the first connection portion of the first differential signal terminal, the first connection portion of the first ground terminal and the first connection portion of the second ground terminal are located in a first plane; the first ground terminal is provided with a first torsion portion, which connects the first connection portion of the first ground terminal and the first contact portion of the first ground terminal; the second ground terminal is provided with a second torsion portion, which connects the first connection portion of the second ground terminal and the first contact portion of the second ground terminal; the first contact portion of the first ground terminal is parallel to the first contact portion of the second ground terminal, and both are perpendicular to the first plane.

[0033] As a further improved technical solution of the present invention, the first contact portion of the first grounding terminal includes a first wide surface and a first narrow surface, the first contact portion of the second grounding terminal includes a second wide surface and a second narrow surface, the first protrusion and the third protrusion are respectively in contact with the first narrow surface of the first grounding terminal, and the second protrusion and the fourth protrusion are respectively in contact with the second narrow surface of the second grounding terminal.

[0034] Compared with the prior art, the second terminal module of the present invention includes a shielding shell surrounding the periphery of the docking terminal, and the shielding shell is accommodated in the shielding cavity. Such a configuration reduces crosstalk and improves the quality of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a three-dimensional schematic diagram of a backplane connector assembly of the present invention in one embodiment.

[0036] Figure 2 yes Figure 1 Partial exploded view of the .

[0037] Figure 3 It is a three-dimensional schematic diagram of the first backplane connector of the present invention when it is installed on the first circuit board.

[0038] Figure 4 yes Figure 3 main view.

[0039] Figure 5 yes Figure 3 Partial exploded view of the .

[0040] Figure 6 yes Figure 5 Partial three-dimensional exploded view from another angle.

[0041] Figure 7 It is a partial three-dimensional exploded view of the first backplane connector of the present invention, in which one of the first terminal modules is separated.

[0042] Figure 8 yes Figure 7 A partial three-dimensional exploded view of a first terminal module.

[0043] Fig. 9 yes Figure 8 Partial three-dimensional exploded view from another angle.

[0044] Fig.10 It is a side view of the first insulating support and the first conductive terminal when they are separated.

[0045] Fig.11 is a side view of a first metal shield of a first backplane connector.

[0046] Fig.12 is a side view of the second metal shield of the first backplane connector.

[0047] Fig.13 is along Figure 3 Partial stereoscopic cross-sectional view along line A'-A'.

[0048] Fig.14 yes Fig.13 A partial enlarged view of the middle frame portion B.

[0049] Fig.15 is along Figure 3 Schematic diagram of the cross section along line B'-B'.

[0050] Fig.16 yes Fig.15 A partial enlarged view of the middle frame portion D.

[0051] Fig.17 yes Figure 2 Further exploded view.

[0052] Fig.18 It is a three-dimensional schematic diagram of a second terminal module of the second backplane connector.

[0053] Fig.19 yes Fig.18 Partial exploded view of the .

[0054] Fig. 20 yes Fig.19 A partial enlarged view of the circled portion G.

[0055] Fig.21 It is a three-dimensional exploded view of the insulator and the shielding shell.

[0056] Fig. 22 It is a partial exploded perspective view of the second backplane connector, wherein the second retaining block is separated.

[0057] Fig.23 yes Fig. 22 A partial enlarged view of the circled portion F.

[0058] Fig.24 is along Figure 1 Schematic diagram of the cross section of the JJ line.

[0059] Fig.25 is along Figure 1 Schematic diagram of the cross section of the KK line.

[0060] Fig.26 It is a three-dimensional schematic diagram of the backplane connector assembly of the present invention in another embodiment.

[0061] Fig. 27 yes Fig.26 Partial exploded view of the .

[0062] Fig.28 yes Fig. 27 Another view of the second backplane connector when installed on the second circuit board.

[0063] Fig.29 yes Fig.28 A three-dimensional schematic diagram of the second backplane connector.

[0064] Fig.30 yes Fig.29 A partial exploded view of the second backplane connector.

[0065] Fig.31 It is a three-dimensional schematic diagram of the shielding shell.

[0066] Fig.32 It is a three-dimensional schematic diagram when the shielding shell is sleeved on the second terminal module.

[0067] Fig.33 yes Fig.32 main view.

[0068] Fig.34 yes Fig.32 Rear view of.

[0069] Fig.35 yes Fig.32 Left view of .

[0070] Fig.36 yes Fig.32 Right view of .

[0071] Fig.37 is along Fig.29 Schematic diagram of the cross section along line OO. DETAILED DESCRIPTION

[0072] The exemplary embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. If there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The contents described in the following exemplary embodiments do not represent all embodiments consistent with the present invention; on the contrary, they are only examples of devices, products and / or methods consistent with some aspects of the present invention as recorded in the claims of the present invention.

[0073] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the scope of protection of the present invention. The singular forms "a", "said" or "the" used in the specification and claims of the present invention are also intended to include plural forms, unless the context clearly indicates other meanings.

[0074] It should be understood that the words used in the specification and claims of the present invention, such as "first", "second" and similar words, do not indicate any order, quantity or importance, but are only used to distinguish the names of features. Similarly, words such as "one" or "an" do not indicate a quantitative limitation, but indicate the existence of at least one. Unless otherwise specified, words such as "front", "rear", "upper", "lower" and similar words appearing in the present invention are only for the convenience of explanation and are not limited to a specific position or a spatial orientation. Words such as "include" or "comprise" are an open-ended expression, meaning that the elements appearing before "include" or "comprise" include the elements appearing after "include" or "comprise" and their equivalents, which does not exclude that the elements appearing before "include" or "comprise" may also include other elements. If "several" appears in the present invention, it means two or more.

[0075] Implementation method 1:

[0076] Please refer to Figure 1 and Figure 2 As shown, the first embodiment of the present invention discloses a backplane connector assembly, which includes a first backplane connector 100, a second backplane connector 200 matched with the first backplane connector 100, a first circuit board 301 installed together with the first backplane connector 100, and a second circuit board 302 installed together with the second backplane connector 200. In the illustrated embodiment of the present invention, the first backplane connector 100 and the second backplane connector 200 are plugged in an orthogonal manner, and the first circuit board 301 is perpendicular to the second circuit board 302.

[0077] Please refer to Figure 3 and Figure 4 As shown, the first backplane connector 100 includes a first shell 1, a plurality of first terminal modules 2 mounted on the first shell 1, a first retaining piece 3 retained at the rear end of the plurality of first terminal modules 2, and a first retaining block 4 retained at the bottom end of the plurality of first terminal modules 2.

[0078] Please refer to Figure 5 and Figure 6 As shown, the first housing 1 is made of insulating material, and includes a first body portion 11, a first wall portion 12 extending backward from one side of the first body portion 11, and a second wall portion 13 extending backward from the other opposite side of the first body portion 11. The first body portion 11 is provided with a docking surface 111 and a plurality of first terminal receiving grooves 112 penetrating the docking surface 111. In the illustrated embodiment of the present invention, the first terminal receiving grooves 112 are arranged in multiple rows along the vertical direction, wherein the first terminal receiving grooves 112 of two adjacent rows are staggered along the left-right direction, that is, the first terminal receiving grooves 112 at corresponding positions in the two adjacent rows of first terminal receiving grooves 112 are not aligned along the vertical direction. The first wall portion 12 is provided with a plurality of first slots 121 and a first locking groove 122 connected to the first slots 121. The second wall portion 13 is provided with a plurality of second slots 131 and a second locking groove 132 connected to the second slots 131. The first locking groove 122 and the second locking groove 132 extend outward through the first wall portion 12 and the second wall portion 13 respectively to lock the first terminal module 2 to prevent the first terminal module 2 from being separated from the first housing 1. The first slot 121, the second slot 131 and the first terminal receiving groove 112 aligned with each other are used to receive a first terminal module 2 together.

[0079] In addition, please refer to Figure 6As shown, the first housing 1 is further provided with a plurality of positioning protrusions 14 extending forward from the first wall portion 12 and the second wall portion 13 and protruding from the docking surface 111. The positioning protrusions 14 are provided with guiding inclined surfaces 141 at their ends. Figure 6 In the illustrated embodiment of the present invention, the guiding slope 141 includes a plurality of first guiding slopes 1411 located on the top surface and second guiding slopes 1412 located on two side surfaces.

[0080] Please refer to Figure 7 As shown, the first terminal module 2 includes a first insulating bracket 21, a plurality of first conductive terminals 22 fixed to the first insulating bracket 21, a first metal shielding sheet 23 fixed to one side of the first insulating bracket 21, and a second metal shielding sheet 24 fixed to the other opposite side of the first insulating bracket 21.

[0081] Please refer to Fig.10 As shown, the first insulating bracket 21 is roughly in the shape of a frame, and includes a first rear wall 211, a first front wall 212 opposite to the first rear wall 211, a first top wall 213 connecting one end of the first rear wall 211 and one end of the first front wall 212, a first bottom wall 214 connecting the other end of the first rear wall 211 and the other end of the first front wall 212, and a plurality of connecting walls 215. The connecting walls 215 can play a role in strengthening the structural strength of the frame. The first rear wall 211 is provided with a first protrusion 2111 and a second protrusion 2112 that protrude backwards and are arranged at intervals. The first protrusion 2111 is aligned with the second protrusion 2112. The first protrusion 2111 is provided with a first contraction portion 2113, and the second protrusion 2112 is provided with a second contraction portion 2114. In the illustrated embodiment of the present invention, the first insulating bracket 21 is provided with a first hollow portion 210, and the connecting wall 215 includes a first connecting wall 2151 connecting the first top wall 213 and the first bottom wall 214 and a second connecting wall 2152 connecting the first rear wall 211 and the first bottom wall 214. The first connecting wall 2151 and the second connecting wall 2152 are arranged obliquely. One end of the first connecting wall 2151 and the second connecting wall 2152 are close to each other, and the other end is spread out to form a radial shape. The connecting wall 215 is also provided with a first reinforcing wall 2153 connecting the first top wall 213 and the first bottom wall 214 and parallel to the first front wall 212. Please refer to Fig.10As shown, the width of the first reinforcing wall 2153 is smaller than the width of the first front wall 212. The first connecting wall 2151 and the second connecting wall 2152 are exposed in the first hollow portion 210. The first top wall 213 is provided with a first locking protrusion 2131 for inserting into the first locking groove 122, and the first bottom wall 214 is provided with a second locking protrusion 2141 for inserting into the second locking groove 132.

[0082] Please refer to Figures 8 to 10 As shown, the first insulating support 21 is also provided with a plurality of bosses 216 for fixing the first metal shielding sheet 23 and the second metal shielding sheet 24. In the illustrated embodiment of the present invention, the bosses 216 are roughly cylindrical. In the illustrated embodiment of the present invention, the bosses 216 are arranged on the first bottom wall 214, the first connecting wall 2151, the second connecting wall 2152, the first reinforcing wall 2153 and the first front wall 212. Since the first metal shielding sheet 23 and the second metal shielding sheet 24 are respectively located on both sides of the first insulating support 21, the bosses 216 include a first boss 2161 and a second boss 2162, wherein the first boss 2161 and the second boss 2162 are respectively located on the opposite sides of the first insulating support 21 to fix and position the first metal shielding sheet 23 and the second metal shielding sheet 24. The size of the protruding column 216 on the first reinforcing wall 2153 is smaller than the size of the protruding column 216 on the first connecting wall 2151 , the second connecting wall 2152 and the first front wall 212 .

[0083] Please refer to Fig.10 As shown, structurally, each group of first conductive terminals 22 includes a first contact portion 221, a first tail portion 222, and a first connecting portion 223 connecting the first contact portion 221 and the first tail portion 222. Part of the first contact portion 221 is used to electrically connect to the second backplane connector 200, and the first tail portion 222 is used to be installed on the first circuit board 301. In the illustrated embodiment of the present invention, the first contact portion 221 is substantially perpendicular to the first tail portion 222, and the first connecting portion 223 is curved. Specifically, the first connecting portion 223 includes a first portion 223a parallel to the first contact portion 221, a second portion 223b parallel to the first tail portion 222, and a third portion 223c connecting the first portion 223a and the second portion 223b. Please refer to Fig.10 As shown, the first portion 223a extends horizontally, the second portion 223b extends vertically, and the third portion 223c extends obliquely.

[0084] From a functional point of view, each group of first conductive terminals 22 includes a plurality of first ground terminals G1, a plurality of second ground terminals G2 and a plurality of first signal terminals S1. In the illustrated embodiment of the present invention, two adjacent first signal terminals S1 form a pair of first differential signal terminals, and each pair of first differential signal terminals is located between a first ground terminal G1 and a second ground terminal G2, that is, each group of first conductive terminals 22 is arranged in a G1-S1-S1-G2 manner, which is conducive to improving the quality of signal transmission. The first differential signal terminal is narrow-side coupled or wide-side coupled. The width of the first ground terminal G1 and the second ground terminal G2 is greater than the width of the first signal terminal S1 between them, which is conducive to increasing the shielding area and improving the shielding effect.

[0085] In the illustrated embodiment of the present invention, the first connection portion 223 of the first conductive terminal 22 is embedded in the first insulating bracket 21. The first connection portion 223 of the first differential signal terminal, the first connection portion 223 of the first ground terminal G1, and the first connection portion 223 of the second ground terminal G2 are all exposed in the same first hollow portion 210. The first connection portion 223 of the first signal terminal S1 is provided with a narrowing portion 2230 embedded in the first insulating bracket 21 to adjust the impedance of the first signal terminal S1 and achieve impedance matching. In the illustrated embodiment of the present invention, the first contact portion 221 of the first signal terminal S1 is roughly needle-shaped, and the first contact portions 221 of the first ground terminal G1 and the second ground terminal G2 are roughly rectangular. The first contact portion 221 of the first signal terminal S1 and the first connection portion 223 of the first conductive terminal 22 are coplanar, that is, located in a first plane (e.g., a horizontal plane). It should be noted that the technical term "coplanar" used in the present invention is intended to indicate that the relevant elements are substantially flush, which includes the situation of incomplete coplanarity caused by manufacturing tolerances. However, in the illustrated embodiment of the present invention, the first ground terminal G1 is provided with a first twisting portion 2241 connecting its first contact portion 221 and its first tail portion 222, so that the first contact portion 221 of the first ground terminal G1 is located in a second plane (e.g., a vertical plane) perpendicular to the first plane. The second ground terminal G2 is provided with a second twisting portion 2242 connecting its first contact portion 221 and its first tail portion 222, so that the first contact portion 221 of the second ground terminal G2 is also located in a second plane (e.g., a vertical plane) perpendicular to the first plane. The first contact portion 221 of the first ground terminal G1 and the first contact portion 221 of the second ground terminal G2 are parallel to each other. The first connecting portion 223 of the first ground terminal G1 and the second ground terminal G2 is also provided with a slot 2231 near the first tail portion 222 thereof. The slot 2231 penetrates through the bottom edge of the first connection portion 223 of the first ground terminal G1 and the second ground terminal G2 , so that the first connection portion 223 of the first ground terminal G1 and the second ground terminal G2 is divided into a first end portion 2232 and a second end portion 2233 .

[0086] Please refer to Fig.15 and Fig.16As shown, in the illustrated embodiment of the present invention, the first contact portion 221 and the first connecting portion 223 of the first ground terminal G1 are both provided with a first wide surface 221a and a first narrow surface 221b perpendicular to the first wide surface 221a. The first contact portion 221 and the first connecting portion 223 of the second ground terminal G2 are both provided with a second wide surface 221c and a second narrow surface 221d perpendicular to the second wide surface 221c. The first connecting portion 223 of each pair of first differential signal terminals is located between the first narrow surface 221b of the first ground terminal G1 and the second narrow surface 221d of the second ground terminal G2 on both sides thereof. The first contact portion 221 of each pair of first differential signal terminals is located between the first wide surface 221a of the first ground terminal G1 and the second wide surface 221c of the second ground terminal G2 on both sides thereof. In the illustrated embodiment of the present invention, the widths of the first wide surface 221a and the second wide surface 221c are greater than the width of the first contact portion 221 of the first signal terminal S1, thereby providing better shielding for the first contact portion 221 of the first signal terminal S1.

[0087] In the illustrated embodiment of the present invention, the first metal shielding sheet 23 and the second metal shielding sheet 24 are symmetrically arranged on both sides of the first insulating bracket 21. Fig. 9 and Fig.11As shown, the first metal shielding sheet 23 includes a first main body portion 231 and a first extension portion 232 extending from the first main body portion 231. The first main body portion 231 is located on one side of the first connecting portion 223 of the first conductive terminal 22, and the first extension portion 232 is located on one side of the first contact portion 221 of the first conductive terminal 22. In the illustrated embodiment of the present invention, the first extension portion 232 and the first main body portion 231 are located in different planes, wherein the first extension portion 232 is farther away from the second metal shielding sheet 24 than the first main body portion 231. The first main body portion 231 is provided with a plurality of first mounting holes 2311 that match with a plurality of first convex columns 2161, and the first convex columns 2161 are fixed and positioned in the first mounting holes 2311 by welding, thereby achieving the fixing and positioning of the first metal shielding sheet 23 and the first insulating bracket 21. The first main body 231 is provided with a plurality of convex ribs 233, and the convex ribs 233 include a first convex rib 2331 protruding toward the first grounding terminal G1 and a second convex rib 2332 protruding toward the second grounding terminal G2. The first convex rib 2331 is arranged along the extension direction of the first connecting portion 223 of the first grounding terminal G1. The second convex rib 2332 is arranged along the extension direction of the first connecting portion 223 of the second grounding terminal G2. In the illustrated embodiment of the present invention, the first convex rib 2331 and the second convex rib 2332 are formed by stamping the first main body 231. The first convex rib 2331 and the second convex rib 2332 protrude toward the direction of the second metal shielding sheet 24. The first convex rib 2331 and the second convex rib 2332 are discontinuously arranged along the extension direction of the first connecting portion 223 of the first grounding terminal G1 and the second grounding terminal G2 to achieve multi-point contact, so as to improve the contact reliability between the first metal shielding sheet 23 and the first grounding terminal G1 and the second grounding terminal G2. In the illustrated embodiment of the present invention, please refer to Fig.14 As shown, the wall thickness of the first rib 2331, the wall thickness of the second rib 2332, and the wall thickness of the portion of the first main body 231 between the first rib 2331 and the second rib 2332 are the same. Specifically, the first rib 2331 and the second rib 2332 each include a first rib portion 233a parallel to the first contact portion 221, a second rib portion 233b parallel to the first tail portion 222, and a third rib portion 233c connecting the first rib portion 233a and the second rib portion 233b. Please refer to Fig.11As shown, the first convex rib 233a extends horizontally, the second convex rib 233b extends vertically, and the third convex rib 233c extends obliquely. The first convex rib 233a, the second convex rib 233b, and the third convex rib 233c are in contact with the first part 223a, the second part 223b, and the third part 223c of the corresponding first grounding terminal G1 and the second grounding terminal G2, respectively.

[0088] The first extension portion 232 is provided with a first protrusion 2321 protruding toward the first contact portion 221 of the first grounding terminal G1, a second protrusion 2322 protruding toward the first contact portion 221 of the second grounding terminal G2, and a first elastic piece 2323 located between the adjacent first protrusion 2321 and the second protrusion 2322. The first elastic piece 2323 extends toward the direction of the first main body portion 231, and the first elastic piece 2323 is provided with an arc-shaped contact portion 2324. In the illustrated embodiment of the present invention, the first extension portion 232 is further provided with two first protrusions 2325 located at both ends of the first elastic piece 2323, and the first protrusion 2325 is opposite to the extension direction of the first elastic piece 2323, and the first protrusion 2325 protrudes outward to contact the adjacent first terminal module 2 to improve the shielding effect. In the illustrated embodiment of the present invention, please refer to Fig.16 As shown, the wall thickness of the first protrusion 2321 , the wall thickness of the second protrusion 2322 , and the wall thickness of the portion of the first extension portion 232 located between the first protrusion 2321 and the second protrusion 2322 are the same.

[0089] In addition, the first main body 231 is further provided with a plurality of first protruding pieces 2312 further extending downward from the bottom edge thereof and a connecting piece 2313 located between two adjacent first protruding pieces 2312. The first protruding pieces 2312 can extend the shielding length and improve the shielding effect of the first signal terminal S1. In the illustrated embodiment of the present invention, the connecting piece 2313 is stamped from the first main body 231, and the connecting piece 2313 spans the slot 2231 to connect the first end 2232 of the same first grounding terminal G1 with one side of the second end 2233 to improve the shielding effect; at the same time, the connecting piece 2313 can also connect the first end 2232 of the same second grounding terminal G2 with one side of the second end 2233 to improve the shielding effect.

[0090] Similarly, see Figure 8 and Fig.12As shown, the second metal shielding sheet 24 includes a second main body portion 241 and a second extension portion 242 extending from the second main body portion 241. The second main body portion 241 is located at the other opposite side of the first connecting portion 223 of the first conductive terminal 22, and the second extension portion 242 is located at the other opposite side of the first contact portion 221 of the first conductive terminal 22. In the illustrated embodiment of the present invention, the second extension portion 242 and the second main body portion 241 are located in different planes, wherein the second extension portion 242 is farther away from the first metal shielding sheet 23 than the second main body portion 241. The second main body portion 241 is provided with a plurality of second mounting holes 2411 that match with a plurality of second convex columns 2162, and the second convex columns 2162 are fixed and positioned in the second mounting holes 2411 by welding, thereby achieving the fixing and positioning of the second metal shielding sheet 24 and the first insulating bracket 21. The second main body 241 is provided with a plurality of ribs 243, and the ribs 243 include a third rib 2431 protruding toward the first ground terminal G1 and a fourth rib 2432 protruding toward the second ground terminal G2. The third rib 2431 is arranged along the extension direction of the first connection portion 223 of the first ground terminal G1. The fourth rib 2432 is arranged along the extension direction of the first connection portion 223 of the second ground terminal G2. In the illustrated embodiment of the present invention, the third rib 2431 and the fourth rib 2432 are formed by stamping the second main body 241. The third rib 2431 and the fourth rib 2432 protrude toward the direction of the first metal shielding sheet 23. The third rib 2431 and the fourth rib 2432 are discontinuously arranged along the extension direction of the first connection portion 223 of the first ground terminal G1 and the second ground terminal G2, so as to realize multi-point contact, so as to improve the contact reliability between the second metal shielding sheet 24 and the first ground terminal G1 and the second ground terminal G2. In the illustrated embodiment of the present invention, the wall thickness of the third rib 2431, the wall thickness of the fourth rib 2432, and the wall thickness of the portion of the second body portion 241 between the third rib 2431 and the fourth rib 2432 are the same. Specifically, the third rib 2431 and the fourth rib 2432 each include a first rib portion 243a parallel to the first contact portion 221, a second rib portion 243b parallel to the first tail portion 222, and a third rib portion 243c connecting the first rib portion 243a and the second rib portion 243b. Please refer to Fig.12As shown, the first convex rib 243a extends horizontally, the second convex rib 243b extends vertically, and the third convex rib 243c extends obliquely. The first convex rib 243a, the second convex rib 243b, and the third convex rib 243c are in contact with the first part 223a, the second part 223b, and the third part 223c of the corresponding first grounding terminal G1 and the second grounding terminal G2, respectively. In one embodiment of the present invention, welding is performed on the surface of the convex rib 233 and the convex rib 243 to weld the convex rib 233 and the convex rib 243 to the first grounding terminal G1 and the second grounding terminal G2. For example, welding is performed on the surfaces of the first convex rib 2331, the second convex rib 2332, the third convex rib 2431 and the fourth convex rib 2432 to weld the first convex rib 2331, the second convex rib 2332, the third convex rib 2431 and the fourth convex rib 2432 to the first ground terminal G1 and the second ground terminal G2, wherein the welding method is at least one of spot welding, laser welding and ultrasonic welding.

[0091] The second extension portion 242 is provided with a third protrusion 2421 protruding toward the first contact portion 221 of the first ground terminal G1, a fourth protrusion 2422 protruding toward the first contact portion 221 of the second ground terminal G2, and a second elastic piece 2423 located between the adjacent third protrusion 2421 and fourth protrusion 2422. The second elastic piece 2423 extends toward the second main body portion 241, and the second elastic piece 2423 is provided with an arc-shaped contact portion 2424. In the illustrated embodiment of the present invention, the second extension portion 242 is further provided with two second protrusions 2425 located at both ends of the second elastic piece 2423, and the second protrusion 2425 extends in the opposite direction to the second elastic piece 2423, and the second protrusion 2425 protrudes outward to contact with the adjacent first terminal module 2 to improve the shielding effect. In the illustrated embodiment of the present invention, the wall thickness of the third protrusion 2421 , the wall thickness of the fourth protrusion 2422 , and the wall thickness of the portion of the second extension portion 242 located between the third protrusion 2421 and the fourth protrusion 2422 are the same.

[0092] In addition, the second main body 241 is also provided with a plurality of second protruding pieces 2412 further extending downward from the bottom edge thereof and a connecting piece 2413 located between two adjacent second protruding pieces 2412. The second protruding pieces 2412 can extend the shielding length and improve the shielding effect of the first signal terminal S1. In the illustrated embodiment of the present invention, the connecting piece 2413 is stamped from the second main body 241, and the connecting piece 2413 spans the slot 2231 to connect the first end 2232 of the same first grounding terminal G1 with the other opposite side of the second end 2233 to improve the shielding effect; at the same time, the connecting piece 2413 can also connect the first end 2232 of the same second grounding terminal G2 with the other opposite side of the second end 2233 to improve the shielding effect.

[0093] Please refer to Fig.13 and Fig.14 As shown, along the length of the first connection portion 223 of the first conductive terminal 22, the first convex rib 2331 of the first metal shielding sheet 23 and the third convex rib 2431 of the second metal shielding sheet 24 are respectively in contact with two opposite side surfaces of the first connection portion 223 of the first grounding terminal G1, thereby forming a surrounding shielding cavity 26 around the periphery of the first connection portion 223 of each pair of first differential signal terminals. In the illustrated embodiment of the present invention, the first convex rib 2331 and the third convex rib 2431 are respectively in contact with the first wide surface 221a of the first connection portion 223 of the first grounding terminal G1, and the second convex rib 2332 and the fourth convex rib 2432 are respectively in contact with the second wide surface 221c of the first connection portion 223 of the second grounding terminal G2. In the illustrated embodiment of the present invention, the shielding cavity 26 is formed by the first main body 231, the second main body 241, the first grounding terminal G1, and the second grounding terminal G2. The first connection portion 223 of the first grounding terminal G1 is provided with a first convex portion 2234 extending into the shielding cavity 26, the first connection portion 223 of the second grounding terminal G2 is provided with a second convex portion 2235 extending into the shielding cavity 26, and the first connection portion 223 of the first differential signal terminal is located between the first convex portion 2234 and the second convex portion 2235. There are multiple shielding cavities 26 and they are continuously arranged along the arrangement direction of each group of the first conductive terminals 22, wherein two adjacent shielding cavities 26 share a first grounding terminal G1 or a second grounding terminal G2. A portion of the shared first grounding terminal G1 protrudes into one shielding cavity 26, and another portion of the shared first grounding terminal G1 protrudes into another shielding cavity 26.

[0094] Please refer to Fig.16As shown, over the length of the first contact portion 221 of the first conductive terminal 22, the first protrusion 2321 and the third protrusion 2421 of the first metal shielding sheet 23 are in contact with two opposite side surfaces of the first contact portion 221 of the first grounding terminal G1, and the second protrusion 2322 and the fourth protrusion 2422 are in contact with two opposite side surfaces of the first contact portion 221 of the second grounding terminal G2. In the illustrated embodiment of the present invention, the first protrusion 2321 and the third protrusion 2421 of the first metal shielding sheet 23 are in contact with the first narrow surface 221b of the first contact portion 221 of the first grounding terminal G1, and the second protrusion 2322 and the fourth protrusion 2422 are in contact with the second narrow surface 221d of the first contact portion 221 of the second grounding terminal G2. The first extension portion 232, the second extension portion 242, the first grounding terminal G1, and the second grounding terminal G2 form a shielding cavity 27 for accommodating the first contact portion 221 of the first differential signal terminal. The first elastic sheet 2323 and the second elastic sheet 2423 extend into the shielding cavity 27. The shielding cavity 27 is continuously arranged along the stacking direction of each group of the first conductive terminals 22, wherein two adjacent shielding cavities 27 share a first grounding terminal G1 or a second grounding terminal G2. One first wide surface 221a of the first contact portion 221 of the shared first grounding terminal G1 is exposed to the shielding cavity 27, and the other first wide surface 221a of the first contact portion 221 of the shared first grounding terminal G1 is exposed to the adjacent shielding cavity 27. Similarly, one first wide surface 221c of the first contact portion 221 of the shared second grounding terminal G2 is exposed to the shielding cavity 27, and the other first wide surface 221c of the first contact portion 221 of the shared second grounding terminal G2 is exposed to the adjacent shielding cavity 27.

[0095] In the illustrated embodiment of the present invention, there are multiple first terminal modules 2 of the first backplane connector 100, and the terminal arrangements of two adjacent first terminal modules 2 are staggered. Accordingly, the shielding cavities 26 at the same position of two adjacent first terminal modules 2 are staggered; the shielding cavities 27 at the same position of two adjacent first terminal modules 2 are staggered (see Fig.15 ).

[0096] Please refer to Fig.17 As shown, the second backplane connector 200 includes a second housing 5, a plurality of second terminal modules 6 mounted on the second housing 5, a second retaining piece 7 fixed on one side of the plurality of second terminal modules 6, and a second retaining block 8 fixed on the other side of the plurality of second terminal modules 6. The second housing 5 is provided with a receiving space 535 for at least partially receiving the first backplane connector 100.

[0097] Please refer to Fig.18 and Fig.19 As shown, the second terminal module 6 includes a second insulating bracket 61, a plurality of second conductive terminals 62 embedded in the second insulating bracket 61, a third metal shielding sheet 63 fixed on one side of the second insulating bracket 61, and a fourth metal shielding sheet 64 fixed on the other opposite side of the second insulating bracket 61.

[0098] From a structural point of view, each group of second conductive terminals 62 includes a second contact portion 621, a second tail portion 622, and a second connecting portion 623 connecting the second contact portion 621 and the second tail portion 622. Part of the second contact portion 621 is used to electrically connect to the first backplane connector 100, and the second tail portion 622 is used to be mounted on the second circuit board 302. In the illustrated embodiment of the present invention, the second contact portion 621 is substantially perpendicular to the second tail portion 622, and the second connecting portion 623 is curved.

[0099] Please refer to Fig. 20 As shown, from a functional point of view, each group of second conductive terminals 62 includes a plurality of third ground terminals G3, a plurality of fourth ground terminals G4 and a plurality of second signal terminals S2. In the illustrated embodiment of the present invention, two adjacent second signal terminals S2 form a pair of second differential signal terminals, and each pair of second differential signal terminals is located between a third ground terminal G3 and a fourth ground terminal G4, that is, each group of second conductive terminals 62 is arranged in a G3-S2-S2-G4 manner, which is conducive to improving the quality of signal transmission. The second differential signal terminals are narrow-side coupled or wide-side coupled. The width of the third ground terminal G3 and the fourth ground terminal G4 is greater than the width of the second signal terminal S2 between them, which is conducive to increasing the shielding area and improving the shielding effect.

[0100] Please refer to Figure 21 to Figure 23 As shown, each group of second terminal modules 6 also includes an insulator 65 sleeved on the second contact portion 621 and a shielding shell 66 sleeved on the insulator 65. Each of the insulators 65 is provided with two through holes 651 for inserting the second contact portion 621 of the second signal terminal S2 and a mating surface 652 at the end. In the illustrated embodiment of the present invention, the insulator 65 is roughly in the shape of a rectangular parallelepiped; correspondingly, the shielding shell 66 is roughly in the shape of a rectangular parallelepiped. In one embodiment of the present invention, the insulator 65 is fixed in the shielding shell 66 by welding. Of course, in other embodiments, the insulator 65 can also be fixed in the shielding shell 66 by other means.

[0101] The shielding shell 66 includes a first side wall 661, a second side wall 662, a third side wall 663 and a fourth side wall 664 connected in sequence, wherein the first side wall 661 is opposite to the third side wall 663, and the second side wall 662 is opposite to the fourth side wall 664. The area of ​​the first side wall 661 and the third side wall 663 is greater than the area of ​​the second side wall 662 and the fourth side wall 664. The ends of the first side wall 661, the second side wall 662, the third side wall 663 and the fourth side wall 664 are all provided with a deflection portion 665 bent inwardly. By providing the deflection portion 665, on the one hand, a contraction opening can be formed at the end of the shielding shell 66, so that the outer surface 6651 of the deflection portion 665 can guide the second terminal module 6 to be installed on the second shell 5, and even guide the shielding shell 66 to be inserted into the first backplane connector 100. In addition, in order to better limit the position of the insulator 65, the second side wall 662 and the fourth side wall 664 are further provided with limiting protrusions 6621 and 6641 formed by inward stamping. The limiting protrusions 6621 and 6641 are used to cooperate with the insulator 65 to prevent the insulator 65 from being pulled out of the shielding shell 66.

[0102] In the illustrated embodiment of the present invention, the shielding shell 66 also includes a first extension piece 6611 extending from the first side wall 661 and a first slot 6612 located on both sides of the first extension piece 6611. The shielding shell 66 also includes a second extension piece 6631 extending from the third side wall 663 and a second slot 6632 located on both sides of the second extension piece 6631. The first extension piece 6611 is in vertical contact with the second contact portion 621 of the third grounding terminal G3 to improve the shielding effect; the second extension piece 6631 is in vertical contact with the second contact portion 621 of the fourth grounding terminal G4 to improve the shielding effect. In the illustrated embodiment of the present invention, the first extension piece 6611 and the second extension piece 6631 are deflected outward and then extended, so that the distance between the first extension piece 6611 and the second extension piece 6631 on the same shielding shell 66 is greater than the distance between the first side wall 661 and the third side wall 663. Please refer to the embodiment of the present invention. Fig. 20As shown, for a group of second conductive terminals 62 arranged in G3-S2-S2-G4, the second contact portion 621 of the third grounding terminal G3 is provided with a first notch 6216 close to the second differential signal terminal, and the first notch 6216 is used to accommodate the first extension piece 6611; the second contact portion 621 of the fourth grounding terminal G4 is provided with a second notch 6217 close to the second differential signal terminal, and the second notch 6217 is used to accommodate the second extension piece 6631. In the illustrated embodiment of the present invention, taking the example that two adjacent pairs of second differential signal terminals share a fourth grounding terminal G4, the two sides of the fourth grounding terminal G4 are respectively provided with second notches 6217 facing different second differential signal terminals, and the second notches 6217 are used to cooperate with two adjacent shielding shells 66.

[0103] Please combine Figure 23 to Figure 25 As shown, when the first backplane connector 100 is mated with the second backplane connector 200, the first housing 1 of the first backplane connector 100 is inserted into the second housing 5 of the second backplane connector 200, and the shielding housing 66 of the second terminal module 6 of the second backplane connector 200 is inserted into the shielding cavity 27 of the first backplane connector 100 under the guidance of the deflection portion 665. The first differential signal terminal of the first backplane connector 100 is connected to the second differential signal terminal of the second backplane connector 200 to achieve electrical connection. For ease of description, the second differential signal terminal of the second backplane connector 200 is also referred to as a docking terminal.

[0104] Implementation method 2:

[0105] Please refer to Fig.26 and Fig. 27 As shown, the second embodiment of the present invention also discloses another backplane connector assembly, which includes Figures 1 to 16 The first backplane connector 100 and another second backplane connector 200' that matches the first backplane connector 100 are shown. The first backplane connector 100 is used to be installed on a first circuit board 301, and the second backplane connector 200' is used to be installed on a second circuit board 302. Since the first backplane connector 100 has been described in detail in the first embodiment, it will not be described in detail in the second embodiment of the present invention, and its related structure will be directly quoted.

[0106] Please refer to Figures 28 to 30 As shown, the second backplane connector 200' includes a second shell 21', a plurality of second terminal modules 22' installed in the second shell 21', a shielding shell 23' fixed to the second shell 21' and located outside the second terminal modules 22', and a second retaining block 24' installed in the second shell 21'.

[0107] Please refer to Fig.30 As shown, the second housing 21' is made of insulating material, and includes a base 210', a first side wall 211' extending upward from one end of the base 210', and a second side wall 212' extending upward from the other opposite end of the base 210'. The base 210', the first side wall 211' and the second side wall 212' together form a receiving space 213' for receiving part of the first backplane connector 100. In the illustrated embodiment of the present invention, the first side wall 211' and the second side wall 212' are parallel to each other and perpendicular to the base 210'.

[0108] In the illustrated embodiment of the present invention, the second shell 21' is further provided with a plurality of insulating protrusions 214' extending integrally from the base 210' and arranged at intervals. The plurality of insulating protrusions 214' extend upward into the receiving space 213'. The plurality of insulating protrusions 214' are arranged in a plurality of rows along the front-to-back direction, and the insulating protrusions 214' in two adjacent rows are arranged in a staggered manner, that is, the insulating protrusions 214' at the same position in two adjacent rows are not aligned along the front-to-back direction. The base 210' is provided with a top surface 2101' exposed in the receiving space 213', a bottom surface 2102' opposite to the top surface 2101', two mounting protrusions 2103' protruding downward from both sides of the bottom surface 2102', and a receiving groove 2100' located between the two mounting protrusions 2103'. The receiving groove 2100' is used to receive the second retaining block 24'.

[0109] Please combine Fig.29 as well as Fig.30 As shown, the base 210' is also provided with a plurality of positioning grooves 2104' that penetrate the top surface 2101'. In the illustrated embodiment of the present invention, each positioning groove 2104' is substantially U-shaped, is arranged around the corresponding insulating protrusion 214', and is used to install the shielding shell 23'. In the illustrated embodiment of the present invention, the positioning groove 2104' penetrates the bottom surface 2102' to communicate with the receiving groove 2100'.

[0110] Please refer to Figure 31 to Figure 37As shown, in the illustrated embodiment of the present invention, the shielding shell 23' is formed by stamping, bending and riveting a metal plate, and includes a barrel portion 231', a mounting portion 232' extending downward from the barrel portion 231', and a plurality of mounting feet 233' extending downward from the mounting portion 232'. The barrel portion 231' includes a first side wall 2311', a second side wall 2312', a third side wall 2313' and a fourth side wall 2314' connected in sequence, wherein the first side wall 2311' is opposite to the third side wall 2313', and the second side wall 2312' is opposite to the fourth side wall 2314', so as to enclose a fully enclosed shielding cavity. Of course, in other embodiments, the shielding cavity may also be non-fully enclosed, for example, the barrel portion 231' includes a second side wall 2312', a third side wall 2313' and a fourth side wall 2314' connected in sequence, so that the barrel portion 231' is roughly U-shaped. In the illustrated embodiment of the present invention, the area of ​​the first side wall 2311' and the third side wall 2313' is greater than the area of ​​the second side wall 2312' and the fourth side wall 2314'. The ends of the first side wall 2311', the second side wall 2312', the third side wall 2313' and the fourth side wall 2314' are provided with a deflection portion 2315' that bends inwardly, and these deflection portions 2315' are each independent so as to bend independently to avoid mutual interference. Each deflection portion 2315' is provided with a guide portion 2315a' located on its outer surface. By providing the deflection portion 2315', a contraction opening can be formed at the end of the shielding shell 23', and the guide portion 2315a' can make it easy to guide the deflection portion 2315' into the first backplane connector 100. In the illustrated embodiment of the present invention, the first side wall 2311' includes a first wall portion 2311a' and a second wall portion 2311b', wherein the first wall portion 2311a' and the second wall portion 2311b' are fixed together by riveting. A rivet line 2311c' is formed at the junction of the first wall portion 2311a' and the second wall portion 2311b'. In other embodiments of the present invention, a deflection portion 2315' bent inwardly may be provided at the ends of at least three of the first side wall 2311', the second side wall 2312', the third side wall 2313' and the fourth side wall 2314' connected to each other. For example, a deflection portion 2315' bent inwardly may be provided at the ends of the second side wall 2312', the third side wall 2313' and the fourth side wall 2314' connected to each other in sequence.

[0111] In the illustrated embodiment of the present invention, the mounting portion 232' is generally U-shaped, and includes a connecting portion 2320', a first bent portion 2321' bent from one side of the connecting portion 2320', a second bent portion 2322' bent from the other opposite side of the connecting portion 2320', a first tail portion 2324' extending downward from the first bent portion 2321', and a second tail portion 2325' extending downward from the second bent portion 2322'. The connecting portion 2320' is coplanar with the third side wall 2313'. The first bent portion 2321' and the second side wall 2312' are located on the same side, and the first bent portion 2321' protrudes outward from the second side wall 2312'. The second bent portion 2322' and the fourth side wall 2314' are located on the same side, and the second bent portion 2322' protrudes outward from the fourth side wall 2314'. The mounting portion 232' further includes a bottom retaining portion 2326' located at the connecting portion 2320'. In the illustrated embodiment of the present invention, when the shielding shell 23' is not mounted on the insulating protrusion 214', the retaining portion 2326' and the connecting portion 2320' are located in the same plane; after the shielding shell 23' is mounted on the insulating protrusion 214', the retaining portion 2326' is bent inward (i.e., in the direction of the first side wall 2311') so that the retaining portion 2326' is perpendicular to the connecting portion 2320'. The retaining portion 2326' is located at the middle of the bottom edge of the connecting portion 2320'. A plurality of first barbs 2321a' are further provided on one side of the first bending portion 2321' away from the third side wall 2313'. A plurality of second barbs 2322a' are further provided on one side of the second bending portion 2322' away from the third side wall 2313'. The first barb portion 2321a' and the second barb portion 2322a' both extend beyond the first side wall 2311' to be clamped on the second shell 21'. The first tail portion 2324' is provided with a first fisheye hole 2324a', so that the first tail portion 2324' has a certain elasticity, so that it is easy to press into the conductive hole of the second circuit board 302 to achieve electrical conduction. The second tail portion 2325' is provided with a second fisheye hole 2325a', so that the second tail portion 2325' has a certain elasticity, so that it is easy to press into the conductive hole of the second circuit board 302 to achieve electrical conduction. In the illustrated embodiment of the present invention, the first tail portion 2324' and the second tail portion 2325' are parallel to each other and aligned left and right.

[0112] Please refer to Fig.37As shown, each second terminal module 22' includes a first signal terminal 221', a second signal terminal 222', and an insulating block 223' fixed on the first signal terminal 221' and the second signal terminal 222'. In one embodiment of the present invention, the first signal terminal 221' and the second signal terminal 222' are embedded in the insulating block 223'. In one embodiment of the present invention, the first signal terminal 221' and the second signal terminal 222' form a group of differential signal terminals. In the illustrated embodiment of the present invention, the first signal terminal 221' and the second signal terminal 222' are symmetrically arranged along the central axis of the insulating block 223'.

[0113] During assembly, first, several shielding shells 23' are sleeved on the insulating protrusions 214' from top to bottom, so that the barrel portion 231' is wrapped around the insulating protrusions 214', and the U-shaped mounting portion 232' is inserted into the U-shaped positioning groove 2104'; the first tail portion 2324' and the second tail portion 2325' respectively extend out of the bottom surface 2102' and are exposed in the receiving groove 2100'. The mounting portion 232' is partially exposed in the receiving groove 2100' to extend the shielding of the first signal terminal 221' and the second signal terminal 222'. When the shielding shell 23' is installed in place, the first barb portion 2321a' and the second barb portion 2322a' will pierce the inner wall of the terminal receiving groove to improve the holding force.

[0114] Insert a plurality of second terminal modules 22 ′ into the corresponding terminal receiving grooves from bottom to top. When the second terminal modules 22 ′ are installed in place, the top surface of the insulating block 223 ′ presses against the bottom surface of the partition 2145 ′ to achieve position limiting.

[0115] Then, the buckling portion 2326' is bent inward to make it contact with the insulating block 223'. This arrangement can prevent the shielding shell 23' from detaching upward from the insulating protrusion 214', and can also prevent the second terminal module 22' from detaching downward from the second shell 21'.

[0116] Finally, the second holding block 24 ′ is installed in the receiving slot 2100 ′ from bottom to top. The first tail portion 2324 ′ and the second tail portion 2325 ′ of the shielding shell 23 ′ pass through the opening 243 ′ of the second holding block 24 ′ to be electrically connected to the second circuit board 302 .

[0117] When the first backplane connector 100 is mated with the second backplane connector 200', the first shell 1 of the first backplane connector 100 is inserted into the receiving space 213' of the second shell 21' of the second backplane connector 200', and the barrel portion 231' of the second terminal module 22' of the second backplane connector 200' is inserted into the shielding cavity 27 of the first backplane connector 100 under the guidance of the deflection portion 2315'. The first differential signal terminal of the first backplane connector 100 is connected to the first signal terminal 221' and the second signal terminal 222' of the second backplane connector 200' to achieve electrical connection. For ease of description, the first signal terminal 221' and the second signal terminal 222' of the second backplane connector 200 are also referred to as docking terminals.

[0118] The above implementation modes are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of the present invention should be based on the technical personnel in the relevant technical field. Although the present invention has been described in detail in this specification with reference to the above implementation modes, the technical personnel in the relevant technical field can still modify or replace the present invention with equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A backplane connector assembly, comprising a first backplane connector (100) and a second backplane connector (200, 200') mating with the first backplane connector (100), wherein the first backplane connector (100) comprises a first terminal module (2), and the first terminal module (2) comprises: A plurality of first conductive terminals (22), wherein the first conductive terminals (22) include a first contact portion (221); A first insulating support (21), wherein the first insulating support (21) and the first conductive terminal (22) are fixed to each other; A first metal shielding sheet (23), wherein the first metal shielding sheet (23) is provided with a first extending portion (232); as well as A second metal shielding sheet (24), wherein the second metal shielding sheet (24) is provided with a second extension portion (242); The first conductive terminal (22) comprises a first differential signal terminal, a first ground terminal (G1) and a second ground terminal (G2), wherein the first differential signal terminal is located between the first ground terminal (G1) and the second ground terminal (G2); The second backplane connector (200, 200') comprises a second terminal module (6, 22'), and the second terminal module (6, 22') comprises a docking terminal docking with the first differential signal terminal; Features: The first contact portion (221) of the first grounding terminal (G1) includes a first wide surface (221a) and a first narrow surface (221b), the first contact portion (221) of the second grounding terminal (G2) includes a second wide surface (221c) and a second narrow surface (221d), and the first extension portion (232) and the second extension portion (242) are in contact with the first narrow surface (221b) of the first grounding terminal (G1) and the second narrow surface (221d) of the second grounding terminal (G2), respectively; The first extension portion (232), the second extension portion (242), the first contact portion (221) of the first ground terminal (G1), and the first contact portion (221) of the second ground terminal (G2) form a shielding cavity (27); the first contact portion (221) of the first differential signal terminal is located in the shielding cavity (27); a first wide surface (221a) of the first contact portion (221) of the first ground terminal (G1) is exposed to the shielding cavity (27); and a second wide surface (221c) of the first contact portion (221) of the second ground terminal (G2) is exposed to the shielding cavity (27); The second terminal module (6, 22') further comprises a shielding shell (23', 66) surrounding the periphery of the butt terminal, and the shielding shell (23', 66) is accommodated in the shielding cavity (27).

2. The backplane connector assembly according to claim 1, wherein: The shielding shell (23', 66) includes a first side wall (2311', 661), a second side wall (2312', 662), a third side wall (2313', 663) and a fourth side wall (2314', 664) connected in sequence, wherein the first side wall (2311', 661) and the third side wall (2313', 663) are arranged face to face, the second side wall (2312', 662) and the fourth side wall (2314', 664) are arranged face to face, and the first side wall (2311', 661), the second side wall (2312', 662), the third side wall (2313', 663) and the fourth side wall (2314', 664) form a hollow cylindrical portion (231').

3. The backplane connector assembly according to claim 2, wherein: The ends of the first side wall (2311', 661), the second side wall (2312', 662), the third side wall (2313', 663) and the fourth side wall (2314', 664) are all provided with inwardly bent deflection parts (2315', 665), and these deflection parts (2315', 665) are separated from each other, and the deflection parts (2315', 665) are used to guide the shielding shell (23', 66) to be inserted into the shielding cavity (27).

4. The backplane connector assembly according to claim 2, wherein: The second terminal module (6) comprises a second insulating support (61), a plurality of second conductive terminals (62) embedded in the second insulating support (61), a third metal shielding sheet (63) fixed on one side of the second insulating support (61), and a fourth metal shielding sheet (64) fixed on the other opposite side of the second insulating support (61), and the second conductive terminal (62) comprises the docking terminal, a third grounding terminal (G3), and a fourth grounding terminal (G4); The shielding shell (66) comprises a first extension piece (6611) extending from the first side wall (661) and first slots (6612) located on both sides of the first extension piece (6611); the shielding shell (66) further comprises a second extension piece (6631) extending from the third side wall (663) and second slots (6632) located on both sides of the second extension piece (6631); The first extension piece (6611) and the second extension piece (6631) are in contact with the third grounding terminal (G3) and the fourth grounding terminal (G4) respectively; The first narrow groove (6612) and the second narrow groove (6632) located on the same side of the first extension piece (6611) and the second extension piece (6631) are used to clamp the third metal shielding piece (63), and the first narrow groove (6612) and the second narrow groove (6632) located on the other same side of the first extension piece (6611) and the second extension piece (6631) are used to clamp the fourth metal shielding piece (64).

5. The backplane connector assembly according to claim 1, wherein: The second terminal module (6) further comprises an insulator (65) sleeved on the butt terminal, and the shielding shell (66) sleeved on the insulator (65).

6. The backplane connector assembly according to claim 2, wherein: The second backplane connector (200') comprises a second shell (21'), the second shell (21') comprises a base (210') and a plurality of insulating protrusions (214') extending integrally from the base (210') and arranged at intervals; the docking terminal comprises a first signal terminal (221') and a second signal terminal (222'); the insulating protrusion (214') is provided with a first terminal receiving hole for receiving the first signal terminal (221') and a second terminal receiving hole for receiving the second signal terminal (222').

7. The backplane connector assembly according to claim 6, wherein: The base (210') is also provided with a terminal receiving groove (2105') which is connected with the first terminal receiving hole and the second terminal receiving hole; the second housing (21') is also provided with a partition (2145') for separating the first terminal receiving hole from the second terminal receiving hole; the second terminal module (22') includes an insulating block (223') fixed on the first signal terminal (221') and the second signal terminal (222'), and the insulating block (223') is received in the terminal receiving groove (2105'); the top surface (2231a') of the insulating block (223') presses against the bottom surface (2145a') of the partition (2145') to achieve limiting.

8. The backplane connector assembly according to claim 7, wherein: The shielding shell (23') further includes a mounting portion (232') extending from the cylindrical portion (231'), the mounting portion (232') including a connecting portion (2320'), a first bending portion (2321') bent from one side of the connecting portion (2320'), and a second bending portion (2322') bent from the other opposite side of the connecting portion (2320'), wherein: the connecting portion (2320') is connected to the third side wall (2313') , the first bending portion (2321') and the second side wall (2312') are located on the same side, and the second bending portion (2322') and the fourth side wall (2314') are located on the same side; the connecting portion (2320') and the third side wall (2313') are coplanar, the first bending portion (2321') protrudes outward from the second side wall (2312'), and the second bending portion (2322') protrudes outward from the fourth side wall (2314').

9. The backplane connector assembly according to claim 8, wherein: The base (210') is provided with a positioning groove (2104') surrounding a portion of the insulating protrusion (214'), and the first bending portion (2321'), the second bending portion (2322') and the connecting portion (2320') are positioned in the positioning groove (2104').

10. The backplane connector assembly according to claim 8, wherein: The mounting portion (232') is provided with a retaining portion (2326') that is pressed against the insulating block (223') to limit the insulating block (223') from disengaging downward from the terminal receiving groove (2105').

11. The backplane connector assembly according to claim 8, wherein: A plurality of first barb portions (2321a') are provided on a side of the first bending portion (2321') away from the third side wall (2313'), and a plurality of second barb portions (2322a') are provided on a side of the second bending portion (2322') away from the third side wall (2313'), and the first barb portions (2321a') and the second barb portions (2322a') are used to be clamped in the second shell (21').

12. The backplane connector assembly according to claim 1, wherein: The first extension portion (232) is provided with a first protrusion (2321) protruding toward the first ground terminal (G1) and a second protrusion (2322) protruding toward the second ground terminal (G2); The second extension portion (242) is provided with a third protrusion (2421) protruding toward the first ground terminal (G1) and a fourth protrusion (2422) protruding toward the second ground terminal (G2); The first protrusion (2321) and the third protrusion (2421) are respectively in contact with two opposite side surfaces of the first contact portion (221) of the first grounding terminal (G1), and the second protrusion (2322) and the fourth protrusion (2422) are respectively in contact with two opposite side surfaces of the first contact portion (221) of the second grounding terminal (G2), so as to form the shielding cavity (27).

13. The backplane connector assembly according to claim 12, wherein: The first conductive terminals (22) each include a first connecting portion (223), wherein the first connecting portion (223) of the first differential signal terminal, the first connecting portion (223) of the first grounding terminal (G1), and the first connecting portion (223) of the second grounding terminal (G2) are located in a first plane; the first grounding terminal (G1) is provided with a first twisting portion (2241), the first twisting portion (2241) connecting the first connecting portion (223) of the first grounding terminal (G1) and the first contact portion (221) of the first grounding terminal (G1); the second grounding terminal (G2) is provided with a second twisting portion (2242), the second twisting portion (2242) connecting the first connecting portion (223) of the second grounding terminal (G2) and the first contact portion (221) of the second grounding terminal (G2); the first contact portion (221) of the first grounding terminal (G1) and the first contact portion (221) of the second grounding terminal (G2) are parallel and perpendicular to the first plane.

14. The backplane connector assembly according to claim 12, wherein: The first protrusion (2321) and the third protrusion (2421) are respectively in contact with the first narrow surface (221b) of the first ground terminal (G1), and the second protrusion (2322) and the fourth protrusion (2422) are respectively in contact with the second narrow surface (221d) of the second ground terminal (G2).

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