Connector

Abstract

A connector comprises a second shell and a second terminal module. The second terminal module comprises a second cable module and a second shielding sleeve sleeved on the second cable module. The second cable module comprises a second terminal module and a second cable electrically connected with the second terminal module. The second shielding sleeve comprises a shielding cavity, and the second terminal module is at least partially located in the shielding cavity. The second shielding sleeve comprises a first shielding piece and a second shielding piece, the first shielding piece and the second shielding piece are arranged in a split mode, and the first shielding piece and the second shielding piece are spliced to form a surrounding type shielding structure. Through the arrangement, the electric connector is beneficial to improving the shielding effect of the second terminal module.

Description

Technical Field

[0001] The utility model relates to a connector, belonging to the technical field of electric connectors. Background Art

[0002] Existing connectors generally include a housing and several terminal modules mounted on the housing, wherein each terminal module includes a mating terminal module and a cable connected to the mating terminal module. The mating terminal module includes several conductive terminals, and two adjacent conductive terminals form a pair of differential signal terminals.

[0003] Each conductive terminal includes a contact portion, a tail portion, and a connecting portion connecting the contact portion and the tail portion. The contact portion includes a first elastic arm, a second elastic arm opposite the first elastic arm, and a connecting wall portion connecting the first and second elastic arms, with the second elastic arm offset from the connecting portion. When a signal is transmitted through the second elastic arm, the signal must pass through the second elastic arm, the connecting wall portion, the connecting portion, and the tail portion before connecting to the cable.

[0004] However, there is still room for improvement in the connectors in the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a connector with an improved structure.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a connector, comprising:

[0007] a second housing; and

[0008] a second terminal module, the second terminal module being disposed in the second housing;

[0009] The second terminal module includes a second cable module and a second shielding sleeve sleeved on the second cable module, and the second cable module includes a second terminal module and a second cable electrically connected to the second terminal module;

[0010] The second shielding sleeve includes a shielding cavity, and the second terminal module is at least partially located in the shielding cavity;

[0011] The second shielding sleeve includes a first shielding piece and a second shielding piece, wherein the first shielding piece and the second shielding piece are separately provided, and the first shielding piece and the second shielding piece are assembled into a surrounding shielding structure.

[0012] As a further improved technical solution of the present invention, the first shielding piece includes a first rear end portion and a first shielding portion extending forward from the first rear end portion. The front end of the first shielding portion is also provided with a first folding piece that is rotated and folded backward, and the first folding piece is exposed in the shielding cavity.

[0013] As a further improved technical solution of the present invention, the second shielding piece includes a second rear end portion and a second shielding portion extending forward from the second rear end portion. The front end of the second shielding portion is also provided with a second folding piece that is rotated and folded backward, and the second folding piece is exposed in the shielding cavity.

[0014] As a further improved technical solution of the present invention, the second terminal module includes a second covering block at least partially fixed on the second terminal module and the second cable, and the second covering block includes a first positioning protrusion and a second positioning protrusion located on both sides;

[0015] The first rear end portion is provided with a first positioning recess that is locked with the first positioning protrusion, and the second rear end portion is provided with a second positioning recess that is locked with the second positioning protrusion.

[0016] As a further improved technical solution of the present invention, a first concave slot is provided at the top of the first rear end portion, and a second concave slot is provided at the bottom of the first rear end portion;

[0017] A third concave slot is provided at the top of the second rear end portion, and a fourth concave slot is provided at the bottom of the second rear end portion;

[0018] When the first shielding piece and the second shielding piece cooperate with each other, the first concave slot and the third concave slot together form a third clamping slot, and the second concave slot and the fourth concave slot together form a fourth clamping slot;

[0019] The second terminal module includes a second shielding clamping plate for clamping the second cable, and the second shielding clamping plate includes a third insertion protrusion inserted into the third clamping groove and a fourth insertion protrusion inserted into the fourth clamping groove.

[0020] As a further improved technical solution of the present invention, the second terminal module includes a second holding block and a plurality of second conductive terminals fixed to the second holding block; each second conductive terminal includes a second contact portion, a second tail portion, and a second connecting portion connecting the second contact portion and the second tail portion; the second tail portion is connected to the second cable;

[0021] The second contact portion of each second conductive terminal includes a first elastic arm, a second elastic arm opposite to the first elastic arm, and a connecting wall portion connecting one side of the first elastic arm and one side of the second elastic arm;

[0022] The first elastic arm includes a first contact arm, and the first contact arm is provided with a first end portion located at an end thereof;

[0023] The second elastic arm includes a second contact arm, and the second contact arm is provided with a second end portion located at an end thereof;

[0024] The second terminal module also includes an insulator, which includes a first side wall, a second side wall opposite to the first side wall, and a terminal receiving hole. The second contact portion of the second conductive terminal is received in the terminal receiving hole. The first side wall is also provided with a first opening passing through the first side wall. The second side wall is also provided with a second opening passing through the second side wall. The first end portion of the first contact arm is configured to be able to undergo elastic deformation in the first opening, and the second end portion of the second contact arm is configured to be able to undergo elastic deformation in the second opening.

[0025] As a further improved technical solution of the present invention, the first shielding sheet is provided with a first opening portion penetrating the first shielding sheet, the first opening portion corresponding to the first opening of the insulator; the first end portion of the first contact arm is configured to be able to elastically deform in the first opening and the first opening portion;

[0026] The second shielding piece includes a second opening portion penetrating the second shielding piece, the second opening portion corresponding to the second opening of the insulator; the second end portion of the second contact arm is configured to be elastically deformable in the second opening and the second opening portion.

[0027] As a further improved technical solution of the present invention, the second holding block includes a second slot, and the second slot extends along the circumference of the second holding block;

[0028] The second terminal module includes a second covering block at least partially fixed on the second holding block and the second cable, and the second covering block is embedded in the second slot of the second holding block.

[0029] As a further improved technical solution of the present invention, the second terminal module includes a second fixing block fixed to the second cable module and the second shielding sleeve;

[0030] The second shell includes a second main body, a first extension wall extending from the second main body to one end, and a second extension wall extending from the second main body to the other end; the second extension wall is provided with a receiving space for accommodating the first backplane connector; the second main body is provided with a second terminal module receiving groove that passes through the second main body and is connected to the second main body; the second shielding sleeve of the second terminal module at least partially passes through the second terminal module receiving groove to extend into the receiving space.

[0031] As a further improved technical solution of the present invention, the first shielding piece and the second shielding piece can share parts.

[0032] Compared to the prior art, the connector of the present invention includes a second terminal module and a second shielding sleeve. The second terminal module includes a second cable module and a second shielding sleeve sleeved on the second cable module. The second cable module includes a second terminal module and a second cable electrically connected to the second terminal module. The second shielding sleeve includes a shielding cavity, and the second terminal module is at least partially located in the shielding cavity. The second shielding sleeve includes a first shielding sheet and a second shielding sheet, wherein the first shielding sheet and the second shielding sheet are assembled into a surrounding shielding structure. With such an arrangement, the present invention is conducive to improving the shielding effect of the second terminal module. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional schematic diagram of the backplane connector assembly of the utility model in the first embodiment, wherein the first backplane connector and the second backplane connector are in a docking state.

[0034] Figure 2 yes Figure 1 A partially exploded perspective view of the backplane connector, wherein the first backplane connector and the second backplane connector are separated from each other.

[0035] Figure 3 yes Figure 2 Partial exploded view from another angle.

[0036] Figure 4 yes Figure 3 Right view of .

[0037] Figure 5 It is a partial exploded perspective view of the first backplane connector in the first embodiment of the present invention, wherein the housing is separated.

[0038] Figure 6 yes Figure 5 Partial exploded view from another angle.

[0039] Figure 7It is a partial exploded perspective view of the first backplane connector in the first embodiment of the present invention, wherein the retaining block is separated.

[0040] Figure 8 yes Figure 7 Partial exploded view from another angle.

[0041] Figure 9 This is a partial exploded perspective view of the first backplane connector in the first embodiment of the present invention, in which one of the first terminal modules is separated.

[0042] Figure 10 yes Figure 9 Partial exploded view from another angle.

[0043] Figure 11 yes Figure 9 A partial exploded view of a first terminal module, wherein the extended shielding shell assembly is separated.

[0044] Figure 12 yes Figure 11 Partial exploded view from another angle.

[0045] Figure 13 yes Figure 11 A partial enlarged view of the middle frame portion B.

[0046] Figure 14 yes Figure 12 A partial enlarged view of part C in the middle frame.

[0047] Figure 15 yes Figure 11 Front view of the extended shield housing assembly.

[0048] Figure 16 yes Figure 15 A partial enlarged view of the middle frame portion D.

[0049] Figure 17 yes Figure 11 A partial exploded perspective view of the extended shield shell assembly.

[0050] Figure 18 yes Figure 17 Partial exploded view from another angle.

[0051] Figure 19 yes Figure 17 A three-dimensional schematic diagram of a partially extended shielding shell assembly.

[0052] Figure 20 yes Figure 19 A three-dimensional diagram from another angle.

[0053] Figure 21 yes Figure 17Right side view of the partially extended shield housing assembly.

[0054] Figure 22 yes Figure 21 Exploded view of a partially extended shield housing assembly.

[0055] Figure 23 yes Figure 11 A partial exploded view of a first terminal module after removing the extended shielding shell assembly, wherein one of the first shielding sleeves is separated.

[0056] Figure 24 yes Figure 23 A partial enlarged view of the middle frame portion E.

[0057] Figure 25 yes Figure 23 Partial exploded view from another angle.

[0058] Figure 26 yes Figure 11 A partial three-dimensional exploded view of a first terminal module, wherein the first metal shielding sheet, the second metal shielding sheet and a plurality of first shielding sleeves are separated.

[0059] Figure 27 yes Figure 26 Partial exploded view from another angle.

[0060] Figure 28 yes Figure 11 A side view of a first terminal module, an insulating bracket, a plurality of first conductive terminals and a plurality of first shielding sleeves after removing the first metal shielding sheet and the second metal shielding sheet.

[0061] Figure 29 yes Figure 2 A three-dimensional schematic diagram of the second backplane connector of the present invention.

[0062] Figure 30 yes Figure 29 A partially exploded perspective view of the second housing is shown in FIG.

[0063] Figure 31 yes Figure 30 Partial exploded view from another angle.

[0064] Figure 32 yes Figure 29 rear view.

[0065] Figure 33 yes Figure 29 main view.

[0066] Figure 34 yes Figure 33 Partial exploded view.

[0067] Figure 35 This is a partial exploded perspective view of the second backplane connector of the present invention.

[0068] Figure 36 yes Figure 35 Partial exploded view from another angle.

[0069] Figure 37 It is a three-dimensional schematic diagram of a second terminal module of the second backplane connector of the present invention.

[0070] Figure 38 yes Figure 37 A three-dimensional diagram from another angle.

[0071] Figure 39 yes Figure 37 Partial exploded view of the .

[0072] Figure 40 yes Figure 39 Partial exploded view from another angle.

[0073] Figure 41 yes Figure 40 A partial exploded view of a second cable module.

[0074] Figure 42 yes Figure 41 Partial exploded view from another angle.

[0075] Figure 43 yes Figure 41 Further partially exploded perspective view.

[0076] Figure 44 yes Figure 43 Partial exploded view from another angle.

[0077] Figure 45 The second cable module is removed Figure 43 A further partial exploded view of the second shielding sleeve and the second insulating block.

[0078] Figure 46 yes Figure 45 Partial exploded view from another angle.

[0079] Figure 47 yes Figure 45 A three-dimensional schematic diagram of a group of second conductive terminals.

[0080] Figure 48 yes Figure 47 A three-dimensional diagram from another angle.

[0081] Figure 49 yes Figure 47A three-dimensional diagram from another angle.

[0082] Figure 50 yes Figure 49 Top view of .

[0083] Figure 51 It is a three-dimensional schematic diagram of a first terminal module of a first backplane connector and a second terminal module of a second backplane connector in the first embodiment of the present invention when they are matched.

[0084] Figure 52 is to remove Figure 51 A three-dimensional schematic diagram of the first terminal module after the first extended shielding piece and the second extended shielding piece.

[0085] Figure 53 yes Figure 52 Right view of .

[0086] Figure 54 yes Figure 53 A partial enlarged view of part F in the middle frame.

[0087] Figure 55 yes Figure 52 A partial exploded perspective view of the first terminal module and the second terminal module is separated from each other.

[0088] Figure 56 yes Figure 55 A partial enlarged view of the middle frame portion H.

[0089] Figure 57 yes Figure 55 A three-dimensional schematic diagram of the first terminal module at another angle.

[0090] Figure 58 yes Figure 57 A partial enlarged view of the middle frame portion I.

[0091] Figure 59 yes Figure 55 A three-dimensional schematic diagram of the first terminal module at another angle.

[0092] Figure 60 yes Figure 59 A partial enlarged view of part J in the middle frame.

[0093] Figure 61 This is a partial exploded perspective view of the first backplane connector of the present invention in the second embodiment.

[0094] Figure 62 is to remove Figure 61 Right side view of the rear panel with the retaining block and circuit board in the image.

[0095] Figure 63 yes Figure 62Exploded view of the mounting block.

[0096] Figure 64 yes Figure 63 Schematic diagram of the exploded view of the middle insulating bracket and the first conductive terminal.

[0097] Figure 65 It is a cross-sectional schematic diagram of the first backplane connector along a certain cross section in the second embodiment of the present invention.

[0098] Figure 66 yes Figure 65 A partial enlarged view of the middle frame portion K.

[0099] Figure 67 yes Figure 66 A partial enlarged view of the middle frame portion L, wherein the first tail portion of the first signal terminal and the first tail portion of the second signal terminal are not fully mounted on the circuit board.

[0100] Figure 68 yes Figure 67 A schematic diagram of another state, wherein the first tail portion of the first signal terminal and the first tail portion of the second signal terminal are mounted to the circuit board and are installed in place.

[0101] Figure 69 It is a three-dimensional schematic diagram of the first backplane connector assembly of the present invention in a third embodiment, wherein the first backplane connector and the second backplane connector are in a docking state.

[0102] Figure 70 yes Figure 69 A partially exploded perspective view of the backplane connector, wherein the first backplane connector and the second backplane connector are separated from each other.

[0103] Figure 71 It is a partial exploded perspective view of the first backplane connector in the third embodiment of the present invention.

[0104] Figure 72 yes Figure 71 Partial exploded view from another angle.

[0105] Figure 73 This is a partial exploded perspective view of a first terminal module of the first backplane connector in the third embodiment of the present invention, wherein the extended shielding shell assembly is separated.

[0106] Figure 74 yes Figure 73 Partial exploded view from another angle.

[0107] Figure 75 yes Figure 73 Further partially exploded perspective view.

[0108] Figure 76 yes Figure 75 Partial exploded view from another angle.

[0109] Figure 77 yes Figure 75 A three-dimensional exploded view of a first cable module.

[0110] Figure 78 yes Figure 77 Exploded three-dimensional diagram from another angle. DETAILED DESCRIPTION

[0111] The following exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. If there are several specific 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; rather, they are merely examples of devices, products and / or methods that are consistent with some aspects of the present invention and are described in the claims of the present invention.

[0112] The terms used in this utility model are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of this utility model. The singular forms "a", "the" or "the" used in the specification and claims of this utility model are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0113] 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, "one" or "an" and similar words do not indicate a quantity limitation, but rather indicate the existence of at least one. Unless otherwise specified, the words "front", "back", "upper", "lower" and similar words that appear in the present invention are only for the convenience of description and are not limited to a specific position or a spatial orientation. Words such as "include" or "comprises" are open-ended expressions, meaning that the elements appearing before "include" or "comprises" include the elements appearing after "include" or "comprises" and their equivalents, which does not exclude that the elements appearing before "include" or "comprises" may also include other elements. If "several" appears in the present invention, it means two or more.

[0114] The utility model discloses a connector assembly, which includes a first connector and a second connector that matches the first connector. The first connector and / or the second connector are both referred to as connectors. Figures 1 to 4As shown, in the first embodiment of the present invention, the connector assembly is a backplane connector assembly, which includes a first backplane connector 100, a second backplane connector 200 that matches the first backplane connector 100, and a circuit board 301 installed together with the first backplane connector 100. The first backplane connector 100 is one of a board-end backplane connector and a cable backplane connector, and the second backplane connector 200 is one of a cable backplane connector and a board-end backplane connector. In the first embodiment of the present invention illustrated in the figure, the first backplane connector 100 is a board-end backplane connector, and the second backplane connector 200 is a cable backplane connector. Of course, those skilled in the art will understand that the combination of the first backplane connector 100 and the second backplane connector 200 can be varied, as long as the two can be docked. Please combine Figure 1 as well as Figure 2 As shown, in the embodiment of the present invention, the first backplane connector 100 and the second backplane connector 200 are plugged together along a first direction A1-A1 (mating direction) to achieve signal transmission. In the embodiment of the present invention, the first direction A1-A1 is a front-to-back direction.

[0115] Please combine Figure 7 as well as Figure 8 As shown, in the first embodiment of the present invention, the circuit board 301 includes a plurality of first signal terminal mounting holes 3011, a plurality of second signal terminal mounting holes 3012, a plurality of first ground terminal mounting holes 3013, and a plurality of second ground terminal mounting holes 3014. In the illustrated embodiment of the present invention, the plurality of first signal terminal mounting holes 3011, the plurality of second signal terminal mounting holes 3012, the plurality of first ground terminal mounting holes 3013, and the plurality of second ground terminal mounting holes 3014 are arranged in a matrix. Adjacent first signal terminal mounting holes 3011 and second signal terminal mounting holes 3012 along the first direction A1-A1 form a group of signal differential pair terminal mounting holes. Each group of signal differential pair terminal mounting holes is provided with a first ground terminal mounting hole 3013 and a second ground terminal mounting hole 3014 at both ends, respectively, to improve signal transmission quality. In the illustrated first embodiment of the present invention, the first signal terminal mounting hole 3011, the second signal terminal mounting hole 3012, the first ground terminal mounting hole 3013, and the second ground terminal mounting hole 3014 are all conductive holes, i.e., the inner walls of the holes are formed with a conductive material (e.g., metal). When the tails of the conductive terminals contact the conductive material, electrical conduction is established with the circuit board 301. The shape, size, and whether the conductive holes extend through the circuit board 301 can be flexibly designed as needed, and this invention will not elaborate on this further.

[0116] Please refer to Figure 5 and Figure 6 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 plurality of retaining plates 3 for retaining the plurality of first terminal modules 2 together, and a retaining block 4 retained at the bottom ends of the plurality of first terminal modules 2.

[0117] In one embodiment of the present invention, the first housing 1 is made of an insulating material and includes a first body portion 11, a first wall portion 12 extending rearward from one side (e.g., the upper side) of the first body portion 11, and a second wall portion 13 extending rearward from the opposite side (e.g., the lower side) of the first body portion 11. The first body portion 11 has a mating surface 111 and a plurality of terminal receiving slots 112 extending through the mating surface 111. In the illustrated embodiment of the present invention, the terminal receiving slots 112 are arranged in multiple rows along a third direction A3-A3 (e.g., the vertical direction) and in multiple columns along a second direction A2-A2 (e.g., the left-right direction). The first direction A1-A1, the second direction A2-A2, and the third direction A3-A3 are perpendicular to each other. The first wall portion 12 has a plurality of first slots 121 and first locking slots 122 connected to the first slots 121. The second wall portion 13 has a plurality of second slots 131 and second locking slots 132 connected to the second slots 131. The first locking groove 122 and the second locking groove 132 extend outwardly through the first wall portion 12 and the second wall portion 13 along the third direction A3-A3, respectively, to lock the first terminal module 2 and prevent the first terminal module 2 from being separated from the first housing 1. The first slot 121, the second slot 131, and the terminal receiving groove 112, which are aligned with each other, are used to receive a first terminal module 2.

[0118] In addition, please refer to Figure 6 As 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 mating surface 111. The positioning protrusions 14 are provided with guiding slopes 141 at their ends. The positioning protrusions 14 are configured to be inserted into the positioning grooves 536 of the second backplane connector 200.

[0119] Please refer to Figures 9 to 28As shown, the first terminal module 2 includes an insulating bracket 21, a plurality of first conductive terminals 22 fixed to the insulating bracket 21, a first metal shielding sheet 23 located on one side of the insulating bracket 21, a second metal shielding sheet 24 located on the other opposite side of the insulating bracket 21, a plurality of first shielding sleeves 25 sleeved on the first metal shielding sheet 23 and the second metal shielding sheet 24, and an extended shielding shell assembly 26.

[0120] The insulating bracket 21 includes a generally frame-shaped frame portion 210 and a plurality of protrusions 219 extending from the frame portion 210 and spaced apart along the third direction A3-A3. The frame portion 210 includes a rear wall 211, a front wall 212 opposite the rear wall 211, a top wall 213 connecting one end of the rear wall 211 with one end of the front wall 212, a bottom wall 214 connecting the other end of the rear wall 211 with the other end of the front wall 212, and a plurality of connecting walls 215. The connecting walls 215 enhance the structural strength of the frame. The rear wall 211 is provided with a first protrusion 2111 and a second protrusion 2112, which protrude rearward and are spaced apart. The first protrusion 2111 is aligned with the second protrusion 2112. The first protrusion 2111 is provided with a first constriction 2113, and the second protrusion 2112 is provided with a second constriction 2114. The top wall 213 is provided with a third protrusion 2133 and a fourth protrusion 2134 that protrude upward and are spaced apart along the first direction A1-A1. The third protrusion 2133 and the fourth protrusion 2134 are aligned along the first direction A1-A1. The third protrusion 2133 is provided with a third constriction 2135, and the fourth protrusion 2134 is provided with a fourth constriction 2136. In the illustrated embodiment of the present invention, the insulating bracket 21 is provided with a hollow portion 217. The connecting wall 215 includes a first connecting wall 2151 connecting the top wall 213 and the bottom wall 214, and a second connecting wall 2152 connecting the rear wall 211 and the bottom wall 214. The first connecting wall 2151 and the second connecting wall 2152 are exposed in the hollow portion 217. The top wall 213 defines a first locking protrusion 2131 for inserting into the first locking groove 122 , and the bottom wall 214 defines a second locking protrusion 2141 for inserting into the second locking groove 132 .

[0121] Please combine Figure 5As shown, the retaining piece 3 includes a first retaining piece 31 and a second retaining piece 32, each of which is generally L-shaped. The first retaining piece 31 and the second retaining piece 32 can be made of sheet metal. The first retaining piece 31 has a first retaining groove 311 that mates with the first and second protrusions 2111, 2112, and is retained by the first and second contracting portions 2113, 2114, respectively. Similarly, the second retaining piece 32 has a second retaining groove 321 that mates with the third and fourth protrusions 2133, 2134, and is retained by the third and fourth contracting portions 2135, 2136, respectively.

[0122] Please combine Figures 26 to 28 As shown, the insulating bracket 21 is further provided with a plurality of protrusions 216 for securing the first metal shielding sheet 23 and the second metal shielding sheet 24. In the illustrated embodiment of the present invention, the protrusions 216 are disposed on the bottom wall 214 and the front wall 212. Since the first metal shielding sheet 23 and the second metal shielding sheet 24 are respectively located on opposite sides of the insulating bracket 21, the protrusions 216 include a first protrusion 2161 and a second protrusion 2162, wherein the first protrusion 2161 and the second protrusion 2162 are respectively located on opposite sides of the insulating bracket 21 to secure and position the first metal shielding sheet 23 and the second metal shielding sheet 24.

[0123] Please refer to Figure 28 As shown, structurally, each set 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. The first contact portion 221 of some first conductive terminals 22 is used to electrically contact the second backplane connector 200, and the first tail portion 222 is used to be mounted on the circuit board 301 along the third direction A3-A3 (mounting direction). 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.

[0124] Functionally, each group of first conductive terminals 22 includes a plurality of first ground terminals G1, a plurality of second ground terminals G2, a plurality of first signal terminals S1, and a plurality of second signal terminals S2. In the illustrated embodiment of the present invention, adjacent first signal terminals S1 and second signal terminals S2 form a pair of first differential signal terminals (Differential Pair), and each pair of first differential signal terminals is located between a first ground terminal G1 and a second ground terminal G2. In other words, each group of first conductive terminals 22 is arranged in a G1-S1-S2-G2 arrangement, which improves signal transmission quality. The first differential signal terminals are either narrow-side coupled or wide-side coupled.

[0125] In the illustrated embodiment of the present invention, the first connecting portion 223 of the first conductive terminal 22 is insert-molded into the insulating bracket 21. The first connecting portion 223 of the first signal terminal S1 and the first connecting portion 223 of the second signal terminal S2 are each provided with a narrowing portion 2230 embedded in the insulating bracket 21 to adjust the impedance of the first and second signal terminals S1 and S2, thereby achieving impedance matching. In the illustrated embodiment of the present invention, the first contact portions 221 of the first and second signal terminals S1 and S2 are both generally needle-shaped, while the first contact portions 221 of the first and second ground terminals G1 and G2 are both generally rectangular plate-shaped. The first contact portions 221 of the first and second signal terminals S1 and S2 extend forward beyond the first contact portions 221 of the first and second ground terminals G1 and G2. The first contact portions 221 of the first and second signal terminals S1 and S2 each extend forward beyond the protruding portion 219 to engage with the second backplane connector 200.

[0126] In the illustrated embodiment of the present invention, the retaining block 4 defines a plurality of through holes 41 . The first tail portions 222 of the first conductive terminals 22 pass through the corresponding through holes 41 along the installation direction and extend downward to protrude from the retaining block 4 .

[0127] In the illustrated first embodiment of the present invention, each first conductive terminal 22 has a fisheye hole on its first tail portion 222, which allows for a certain degree of elastic deformation. The first tail portion 222 of the first signal terminal S1 is inserted into the first signal terminal mounting hole 3011, the first tail portion 222 of the second signal terminal S2 is inserted into the second signal terminal mounting hole 3012, the first tail portion 222 of the first ground terminal G1 is inserted into the first ground terminal mounting hole 3013, and the first tail portion 222 of the second ground terminal G2 is inserted into the second ground terminal mounting hole 3014.

[0128] In the embodiment shown in the figure of the present utility model, the first metal shielding sheet 23 and the second metal shielding sheet 24 are symmetrically arranged on both sides of the insulating bracket 21. Figure 26 as well as Figure 27 As shown, the first metal shielding sheet 23 includes a first main portion 231 and a plurality of first extensions 232 extending from the first main portion 231. The plurality of first extensions 232 are spaced apart in the vertical direction. The first main portion 231 is located on one side of the first connecting portion 223 of the first conductive terminal 22, and the first extensions 232 are located on one side of the protrusion 219 of the first contact portion 221. In the illustrated embodiment of the present invention, the first main portion 231 is provided with a plurality of first mounting holes 2311 that mate with the plurality of first protrusions 2161. Optionally, the first protrusions 2161 are secured and positioned in the first mounting holes 2311 by welding, thereby securing and positioning the first metal shielding sheet 23 to the insulating bracket 21. The first main portion 231 is provided with a plurality of ribs 233, including a first rib 2331 that protrudes toward the first grounding terminal G1 and a second rib 2332 that protrudes toward the second grounding terminal G2. The first rib 2331 is arranged along the extension direction of the first connection portion 223 of the first grounding terminal G1. The second rib 2332 is arranged along the extension direction of the first connection portion 223 of the second grounding terminal G2. In the illustrated embodiment of the present invention, the first rib 2331 and the second rib 2332 are formed by stamping the first main body 231. The first rib 2331 and the second rib 2332 protrude toward the second metal shielding sheet 24. The first rib 2331 and the second rib 2332 are discontinuously arranged along the extension direction of the first connection portion 223 of the first grounding terminal G1 and the second grounding terminal G2, achieving multi-point contact to improve the contact reliability between the first metal shielding sheet 23 and the first grounding terminal G1 and the second grounding terminal G2.

[0129] In the embodiment illustrated in the present invention, the first extension portion 232 is roughly U-shaped, including a first side surface 2320, a first bending portion 2321 bent from one end (for example, the upper end) of the first side surface 2320 toward the second metal shielding sheet 24, and a second bending portion 2322 bent from the other end (for example, the lower end) of the first side surface 2320 toward the second metal shielding sheet 24.

[0130] Similarly, see Figure 26 as well as Figure 27As shown, the second metal shielding plate 24 includes a second main portion 241 and a plurality of second extensions 242 extending from the second main portion 241. The plurality of second extensions 242 are spaced apart in the vertical direction. The second main portion 241 is located on the other side opposite the first connecting portion 223 of the first conductive terminal 22, and the second extensions 242 are located on the other side opposite the protrusion 219 of the first contact portion 221. In the illustrated embodiment of the present invention, the second main portion 241 is provided with a plurality of second mounting holes 2411 that mate with the plurality of second protrusions 2162. Optionally, the second protrusions 2162 are secured and positioned in the second mounting holes 2411 by welding, thereby securing and positioning the second metal shielding plate 24 to the insulating bracket 21. The second main portion 241 is provided with a plurality of ribs 243, including a third rib 2431 that protrudes toward the first ground terminal G1 and a fourth rib 2432 that protrudes toward the second ground terminal G2. The third rib 2431 is disposed along the extension direction of the first connection portion 223 of the first ground terminal G1. The fourth rib 2432 is disposed 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 and fourth ribs 2431 and 2432 are formed by stamping the second main body 241. The third and fourth ribs 2431 and 2432 protrude toward the first metal shielding sheet 23. The third and fourth ribs 2431 and 2432 are disposed discontinuously along the extension direction of the first connection portion 223 of the first and second grounding terminals G1 and G2, achieving multiple points of contact and improving the contact reliability between the second metal shielding sheet 24 and the first and second grounding terminals G1 and G2. In one embodiment of the present invention, welding is performed on the surfaces of the ribs 233 and 243 to weld the ribs 233 and 243 to the first and second grounding terminals G1 and 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.

[0131] In the embodiment illustrated in the present invention, the second extension portion 242 is roughly U-shaped, including a second side surface 2420, a third bending portion 2421 bent from one end (for example, the upper end) of the second side surface 2420 toward the first metal shielding sheet 23, and a fourth bending portion 2422 bent from the other end (for example, the lower end) of the second side surface 2420 toward the first metal shielding sheet 23.

[0132] Along the length of the first connecting 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 respectively contact the two opposite side surfaces of the first connecting portion 223 of the first grounding terminal G1, thereby forming a surrounding shielding cavity around the first connecting portion 223 of each pair of first differential signal terminals, thereby improving the quality of signal transmission.

[0133] Please combine Figure 24 as well as Figure 25 As shown, when the first metal shielding sheet 23 and the second metal shielding sheet 24 are respectively installed on both sides of the insulating bracket 21, the first extension portion 232 of the first metal shielding sheet 23 and the second extension portion 242 of the second metal shielding sheet 24 together form a channel portion 240. The protrusion portion 219 is at least partially accommodated in the channel portion 240. In the present invention, by providing the protrusion portion 219, the first conductive terminal 22 is partially buried in the protrusion portion 219. On the one hand, it can improve the structural strength of the insulating bracket 21, and on the other hand, it is conducive to adjusting the impedance of the first conductive terminal 22, making it easier to achieve impedance matching. In addition, the first extension portion 232 and the second extension portion 242 that are jointly wrapped on the protrusion portion 219 are also conducive to improving the shielding effect of the first conductive terminal 22.

[0134] Of course, technicians in the relevant technical field can understand that in other embodiments of the present invention, the first terminal module 2 can also include at least one metal shielding plate (for example, the first metal shielding plate 23 or the second metal shielding plate 24), and the metal shielding plate is located on at least one side of the insulating bracket 21, and the metal shielding plate is provided with the channel portion 240.

[0135] In the illustrated embodiment of the present invention, the first contact portion 221 of the first ground terminal G1 and the first contact portion 221 of the second ground terminal G2 are both exposed from the insulating bracket 21. The first metal shielding sheet 23 includes a first abutting portion 2341 and a second abutting portion 2342 located on either side (e.g., upper and lower sides) of the first extending portion 232, respectively. The first abutting portion 2341 contacts one side of the first contact portion 221 of the first ground terminal G1, and the second abutting portion 2342 contacts one side of the first contact portion 221 of the second ground terminal G2. Similarly, the second metal shielding sheet 24 includes a third abutting portion 2441 and a fourth abutting portion 2442 located on either side (e.g., upper and lower sides) of the second extending portion 242, respectively. The third abutting portion 2441 contacts the other side of the first contact portion 221 of the first ground terminal G1, and the fourth abutting portion 2442 contacts the other side of the first contact portion 221 of the second ground terminal G2. In other words, the first contact portion 221 of the first ground terminal G1 is clamped by the first abutting portion 2341 and the third abutting portion 2441 , and the first contact portion 221 of the second ground terminal G2 is clamped by the second abutting portion 2342 and the fourth abutting portion 2442 .

[0136] The first shielding sleeve 25 is generally hollow and rectangular in shape. It is sleeved onto the first extension 232 of the first metal shielding sheet 23 and the second extension 242 of the second metal shielding sheet 24, facilitating securing the first and second metal shielding sheets 23, 24 to opposite sides of the insulating bracket 21. Furthermore, the first shielding sleeve 25 is made of metal, i.e., it is a first metal shielding sleeve. The first shielding sleeve 25 contacts the first extension 232 and the second extension 242. The provision of the first shielding sleeve 25 further improves the shielding effect on the first conductive terminal 22.

[0137] Please combine Figures 23 to 25 As shown, in the first embodiment illustrated in the present utility model, the first shielding sleeve 25 includes a first clamping groove 251 and a second clamping groove 252, wherein the first abutting portion 2341, the first contact portion 221 of the first grounding terminal G1 and the third abutting portion 2441 are tightly inserted into the first clamping groove 251; the second abutting portion 2342, the first contact portion 221 of the second grounding terminal G2 and the fourth abutting portion 2442 are tightly inserted into the second clamping groove 252.

[0138] Furthermore, the first shielding sleeve 25 further includes a first abutting tab 253 and a second abutting tab 254 located on either side thereof, wherein the first abutting tab 253 and the second abutting tab 254 respectively contact the first metal shielding sheet 23 and the second metal shielding sheet 24. In the illustrated embodiment of the present invention, to enhance the fit between the first abutting tab 253 and the first metal shielding sheet 23, the first shielding sleeve 25 further includes two first slots 255 located on either side of the first abutting tab 253. Similarly, to enhance the fit between the second abutting tab 254 and the second metal shielding sheet 24, the first shielding sleeve 25 further includes two second slots 256 located on either side of the second abutting tab 254.

[0139] Please combine Figures 11 to 22 as well as Figures 57 to 60 As shown, in the embodiment illustrated in the present invention, the extended shielding shell assembly 26 includes a first extended shielding piece 261, a second extended shielding piece 262, a first connecting shielding piece 263, a second connecting shielding piece 264, a first spring piece group 265 fixed to the inner side of the first connecting shielding piece 263, a second spring piece group 266 fixed to the inner side of the second connecting shielding piece 264, a first abutting spring piece 267 fixed to the inner side of the first extended shielding piece 261, and a second abutting spring piece 268 fixed to the inner side of the second extended shielding piece 262.

[0140] Specifically, in the illustrated embodiment of the present invention, the extended shielding housing assembly 26 includes a shielding cavity 260 enclosed by the first extended shielding piece 261, the second extended shielding piece 262, the first connecting shielding piece 263, and the second connecting shielding piece 264. The first contact portion 221 of the first signal terminal S1 and the first contact portion 221 of the second signal terminal S2 both protrude into the shielding cavity 260. The extended shielding housing assembly 26 provides a good shielding effect for the first contact portion 221 of the first signal terminal S1 and the first contact portion 221 of the second signal terminal S2. The first spring element group 265, the second spring element group 266, the first abutting spring element 267, and the second abutting spring element 268 all at least partially protrude into the shielding cavity 260.

[0141] In the illustrated embodiment of the present invention, the first extended shielding piece 261 is made of a metal material. The first extended shielding piece 261 extends in the vertical direction and includes a plurality of first mounting holes 2611, a plurality of second mounting holes 2612, and a first contact spring 2613 located between the first mounting holes 2611 and the second mounting holes 2612 in the vertical direction. In the illustrated embodiment of the present invention, the first extended shielding piece 261 also includes a plurality of first slots 2614 that are connected to the first contact spring 2613 and are located on the upper and lower sides of the first contact spring 2613. The first contact spring 2613 is flat and can be attached to the first shielding sleeve 25. In addition, the first extended shielding piece 261 also includes a first groove 2615 that is arranged opposite the first contact spring 2613.

[0142] Similarly, the second extended shielding piece 262 is made of a metal material. The second extended shielding piece 262 extends in the vertical direction and includes a plurality of third mounting holes 2621, a plurality of fourth mounting holes 2622, and a second contact spring 2623 located between the third mounting holes 2621 and the fourth mounting holes 2622 in the vertical direction. In the illustrated embodiment of the present invention, the second extended shielding piece 262 also includes a plurality of second slots 2624 that communicate with the second contact spring 2623 and are located on the upper and lower sides of the second contact spring 2623. The second contact spring 2623 is flat and can be aligned with the first shielding sleeve 25. Furthermore, the second extended shielding piece 262 also includes a second groove 2625 that is disposed opposite the second contact spring 2623.

[0143] The first connecting shielding plate 263 is flat and made of metal. It extends horizontally approximately along the first direction A1-A1. It includes a first protrusion 2631 secured in the first mounting hole 2611 and a second protrusion 2632 secured in the third mounting hole 2621. The first protrusion 2631 and the second protrusion 2632 are located on the left and right sides of the first connecting shielding plate 263, respectively. A first clearance groove 2633 and a second clearance groove 2634 are also provided at both ends of the first connecting shielding plate 263 in the front-to-back direction. The first connecting shielding plate 263 also has a first fixing groove 2635 and a second fixing groove 2636, respectively, located on the left and right sides.

[0144] Similarly, the second connecting shielding plate 264 is flat and made of metal. The second connecting shielding plate 264 extends horizontally approximately along the first direction A1-A1. The second connecting shielding plate 264 includes a third protrusion 2641 fixed in the second mounting hole 2612 and a fourth protrusion 2642 fixed in the fourth mounting hole 2622. The third protrusion 2641 and the fourth protrusion 2642 are located on the left and right sides of the second connecting shielding plate 264, respectively. A third clearance groove 2643 and a fourth clearance groove 2644 are also provided at both ends of the second connecting shielding plate 264 in the front-to-back direction, respectively. The second connecting shielding plate 264 also has a third fixing groove 2645 and a fourth fixing groove 2646 located on the left and right sides, respectively.

[0145] In the illustrated embodiment of the present invention, the first spring piece group 265 is made of a metal material. The first spring piece group 265 includes a first spring piece 265a and a second spring piece 265b. The first spring piece 265a includes a first fixing portion 265a0, a first elastic arm 265a1 extending from one end of the first fixing portion 265a0, and a second elastic arm 265a2 extending from the other end of the first fixing portion 265a0. The number and structural form of the first elastic arm 265a1 and the second elastic arm 265a2 can be flexibly adjusted as needed. In the illustrated embodiment of the present invention, the first fixing portion 265a0 is fixed to the lower surface of the first connecting shielding plate 263, for example, the first fixing portion 265a0 is fixed to the lower surface of the first connecting shielding plate 263 by welding. The first elastic arm 265a1 and the second elastic arm 265a2 are both cantilevers, that is, they each have a free end away from the first fixing portion 265a0.

[0146] The second elastic piece 265b includes a second fixing portion 265b0, a third elastic arm 265b1 extending from one end of the second fixing portion 265b0, and a fourth elastic arm 265b2 extending from the other end of the second fixing portion 265b0. In the first embodiment illustrated in the present invention, the third elastic arm 265b1 and the fourth elastic arm 265b2 of the second elastic piece 265b are always in contact with the first shielding sleeve 25. When the second elastic piece 265b is deformed by the abutment of the first shielding sleeve 25, the free end of the third elastic arm 265b1 can move within the second clearance groove 2634. The number and structure of the third elastic arm 265b1 and the fourth elastic arm 265b2 can be flexibly adjusted as needed. In the embodiment illustrated in the present invention, the second fixing portion 265b0 is fixed to the lower surface of the first connecting shielding piece 263, for example, the second fixing portion 265b0 is fixed to the lower surface of the first connecting shielding piece 263 by welding. The third elastic arm 265b1 and the fourth elastic arm 265b2 are both cantilever arms, i.e., they each have a free end away from the second fixing portion 265b0. The third elastic arm 265b1 and the fourth elastic arm 265b2 are configured to abut against the second backplane connector 200, and the free end of the fourth elastic arm 265b2 is movable within the second clearance groove 2634.

[0147] In the illustrated embodiment of the present invention, the first spring piece 265a and the second spring piece 265b are separately provided and welded to the lower surface of the first connecting shielding piece 263. This arrangement allows the first connecting shielding piece 263 to be made of metals of varying materials and / or thicknesses to meet requirements for structural strength and shielding performance. Furthermore, the separate provision of the first connecting shielding piece 263 and the first spring piece assembly 265 avoids the possibility of integrally stamping the first spring piece assembly 265 into the first connecting shielding piece 263, which could leave openings that could affect shielding effectiveness.

[0148] Of course, those skilled in the art will appreciate that, in other embodiments of the present invention, the first elastic piece 265a and the second elastic piece 265b may also be integrally formed.

[0149] In the illustrated embodiment of the present invention, there are two third elastic arms 265b1, and the second elastic piece 265b includes a first receiving slot 265b3 located between the two third elastic arms 265b1. In its free state, the second elastic arm 265a2 protrudes into the first receiving slot 265b3 along the first direction A1-A1 (e.g., the front-to-back direction). In other words, when the first and second elastic pieces 265a, 265b are free, the second elastic arm 265a2 at least partially overlaps the third elastic arm 265b1 in the second direction A2-A2 (e.g., the left-to-right direction).

[0150] In the illustrated embodiment of the present invention, the second spring element assembly 266 is made of a metal material. The second spring element assembly 266 includes a third spring element 266a and a fourth spring element 266b. The third spring element 266a includes a third fixing portion 266a0, a fifth elastic arm 266a1 extending from one end of the third fixing portion 266a0, and a sixth elastic arm 266a2 extending from the other end of the third fixing portion 266a0. The number and structure of the fifth elastic arm 266a1 and the sixth elastic arm 266a2 can be flexibly adjusted as needed. In the illustrated embodiment of the present invention, the third fixing portion 266a0 is fixed to the upper surface of the second connecting shielding plate 264, for example, by welding. The fifth elastic arm 266a1 and the sixth elastic arm 266a2 are cantilevered, that is, each has a free end away from the third fixing portion 266a0.

[0151] The fourth elastic piece 266b includes a fourth fixing portion 266b0, a seventh elastic arm 266b1 extending from one end of the fourth fixing portion 266b0, and an eighth elastic arm 266b2 extending from the other end of the fourth fixing portion 266b0. In the first embodiment illustrated in the present invention, the seventh elastic arm 266b1 and the eighth elastic arm 266b2 of the fourth elastic piece 266b are constantly in contact with the first shielding sleeve 25. When the fourth elastic piece 266b is deformed by the abutment of the first shielding sleeve 25, the free end of the seventh elastic arm 266b1 is able to move within the fourth clearance groove 2644. The number and structure of the seventh elastic arm 266b1 and the eighth elastic arm 266b2 can be flexibly adjusted as needed. In the illustrated embodiment of the present invention, the fourth fixing portion 266b0 is fixed to the upper surface of the second connecting shielding piece 264, for example, by welding. The seventh elastic arm 266b1 and the eighth elastic arm 266b2 are both cantilevered arms, i.e., they each have a free end away from the fourth fixing portion 266b0. The seventh elastic arm 266b1 and the eighth elastic arm 266b2 are configured to abut against the second backplane connector 200, and the free end of the eighth elastic arm 266b2 is movable within the fourth clearance groove 2644.

[0152] In the illustrated embodiment of the present invention, the third spring piece 266a and the fourth spring piece 266b are separately provided and welded to the upper surface of the second connecting shielding piece 264. This arrangement allows the second connecting shielding piece 264 to be made of metals of varying materials and / or thicknesses to meet requirements for structural strength and shielding performance. Furthermore, the second connecting shielding piece 264 is separated from the second spring piece assembly 266, eliminating the need for integrally stamping the second spring piece assembly 266 into the second connecting shielding piece 264, which could leave openings that could affect shielding effectiveness.

[0153] Of course, those skilled in the art will appreciate that in other embodiments of the present invention, the third elastic piece 266a and the fourth elastic piece 266b may also be integrally formed.

[0154] In the illustrated embodiment of the present invention, there are two seventh elastic arms 266b1, and the fourth elastic piece 266b includes a second receiving slot 266b3 located between the two seventh elastic arms 266b1. When in its free state, the sixth elastic arm 266a2 protrudes into the second receiving slot 266b3 along the first direction A1-A1. In other words, when the third elastic piece 266a and the fourth elastic piece 266b are in their free states, the sixth elastic arm 266a2 at least partially overlaps with the seventh elastic arm 266b1 along the second direction A2-A2.

[0155] The first abutting elastic piece 267 includes a first retaining portion 2670, a first abutting elastic arm 2671 extending from one end of the first retaining portion 2670, a second abutting elastic arm 2672 extending from the other end of the first retaining portion 2670, and a first support portion 2673 and a second support portion 2674 located on the upper and lower sides of the first abutting elastic arm 2671. The number and structural form of the first abutting elastic arm 2671 and the second abutting elastic arm 2672 can be flexibly adjusted as needed. In the illustrated embodiment of the present invention, the first retaining portion 2670 is fixed to the inner surface of the first extended shielding piece 261, for example, the first retaining portion 2670 is fixed to the inner surface of the first extended shielding piece 261 by welding. The first abutting elastic arm 2671 and the second abutting elastic arm 2672 are both cantilevers, that is, they each have a free end away from the first retaining portion 2670. When the first abutting elastic piece 267 is deformed by abutment, the free end of the first abutting elastic arm 2671 can move in the first groove 2615. The first supporting portion 2673 is provided with a first fixing protrusion 2673a that is engaged with the first fixing groove 2635, and the second supporting portion 2674 is provided with a second fixing protrusion 2674a that is engaged with the third fixing groove 2645.

[0156] The second abutting elastic piece 268 includes a second retaining portion 2680, a third abutting elastic arm 2681 extending from one end of the second retaining portion 2680, a fourth abutting elastic arm 2682 extending from the other end of the second retaining portion 2680, and a third support portion 2683 and a fourth support portion 2684 located on the upper and lower sides of the third abutting elastic arm 2681. The number and structure of the third abutting elastic arm 2681 and the fourth abutting elastic arm 2682 can be flexibly adjusted as needed. In the illustrated embodiment of the present invention, the second retaining portion 2680 is fixed to the inner surface of the second extended shielding piece 262, for example, the second retaining portion 2680 is fixed to the inner surface of the second extended shielding piece 262 by welding. The third abutting elastic arm 2681 and the fourth abutting elastic arm 2682 are both cantilevered, that is, they each have a free end away from the second retaining portion 2680. When the second abutting elastic piece 268 is abutted and deformed, the free end of the third abutting elastic arm 2681 can move in the second groove 2625. The third supporting portion 2683 is provided with a third fixing protrusion 2683a that is engaged with the second fixing groove 2636, and the fourth supporting portion 2684 is provided with a fourth fixing protrusion 2684a that is engaged with the fourth fixing groove 2646.

[0157] In the embodiment illustrated in the drawings of the present invention, in order to save costs as much as possible, the first extended shielding piece 261 and the second extended shielding piece 262 can share parts, the first connecting shielding piece 263 and the second connecting shielding piece 264 can share parts, the first spring piece 265a and the third spring piece 266a can share parts, the second spring piece 265b and the fourth spring piece 266b can share parts, and the first abutting spring piece 267 and the second abutting spring piece 268 can share parts.

[0158] Please combine Figures 11 to 22 As shown, in the illustrated first embodiment of the present invention, the first elastic arm 265a1 and the second elastic arm 265a2 of the first elastic piece 265a are arranged at intervals along the first direction A1-A1 to form two layers of grounding contact points, thereby improving the grounding and shielding effect when the second backplane connector 200 is mated with the first backplane connector 100. Similarly, the fifth elastic arm 266a1 and the sixth elastic arm 266a2 of the third elastic piece 266a are arranged at intervals along the first direction A1-A1 to form two layers of grounding contact points, thereby improving the grounding and shielding effect when the second backplane connector 200 is mated with the first backplane connector 100.

[0159] In the first embodiment of the present invention shown in the drawings, the first elastic piece 265a and the second elastic piece 265b are fixed to the first connecting shielding piece 263, the third elastic piece 266a and the fourth elastic piece 266b are fixed to the second connecting shielding piece 264, the first abutting elastic piece 267 is fixed to the first extending shielding piece 261, and the second abutting elastic piece 268 is fixed to the second extending shielding piece 262. Of course, those skilled in the art will appreciate that the first elastic piece 265a and the second elastic piece 265b, the third elastic piece 266a and the fourth elastic piece 266b, and the first abutting elastic piece 267 and the second abutting elastic piece 268 may also be swapped. For example, the first elastic piece 265a and the second elastic piece 265b are fixed to the first extended shielding piece 261, the third elastic piece 266a and the fourth elastic piece 266b are fixed to the second extended shielding piece 262, the first abutting elastic piece 267 is fixed to the first connecting shielding piece 263, and the second abutting elastic piece 268 is fixed to the second connecting shielding piece 264.

[0160] During assembly, first, the first conductive terminal 22 is fixed to the insulating bracket 21, for example, the first conductive terminal 22 is embed-molded in the insulating bracket 21; then, the first metal shielding sheet 23 and the second metal shielding sheet 24 are respectively installed on both sides of the insulating bracket 21; at this time, the first extension portion 232 and the second extension portion 242 jointly wrap the protrusion portion 219; then, the first shielding sleeve 25 is sleeved on the first extension portion 232 and the second extension portion 242, and the first abutting portion 2341, the first contact portion 221 of the first grounding terminal G1 and the third abutting portion 2441 are jointly inserted into the first clamping groove 251; the second abutting portion 2342, the first contact portion 221 of the second grounding terminal G2 and the fourth abutting portion 2442 are jointly inserted into the second clamping groove 252.

[0161] Then, the extended shielding shell assembly 26 is assembled into an integral part, and then assembled with other parts of the first terminal module 2 to form the first terminal module 2;

[0162] Then, assemble the first terminal module 2 and the first housing 1;

[0163] Then, the first retaining piece 31 and the second retaining piece 32 are installed on the first terminal module 2;

[0164] Finally, the retaining block 4 is installed on the bottom end of the first terminal module 2 , and the first tail portion 222 of the first conductive terminal 22 is passed through the retaining block 4 downward along the third direction A3 - A3 .

[0165] In the first embodiment illustrated in the present invention, the extended shielding shell assembly 26 is connected to the first metal shielding sheet 23, the second metal shielding sheet 24, the first grounding terminal G1 and the second grounding terminal G2 through the first shielding sleeve 25, thereby increasing the grounding shielding area and improving the quality of signal transmission.

[0166] In addition, the present invention provides the extended shielding shell assembly 26 as a separate part, which helps reduce the design complexity of the first metal shielding sheet 23, the second metal shielding sheet 24, the first grounding terminal G1 and the second grounding terminal G2.

[0167] Please combine Figures 29 to 50 As shown, in the illustrated embodiment of the present invention, the second backplane connector 200 is a cable backplane connector, which includes a second housing 5, a plurality of second terminal modules 6 mounted on the second housing 5, and second positioning pins 8 for positioning the second terminal modules 6 in the second housing 5. The first terminal modules 2 and / or the second terminal modules 6 are both referred to as terminal modules.

[0168] In one embodiment of the present invention, the second housing 5 is made of insulating material and includes a second body portion 51, a first extension wall 52 extending from the second body portion 51 to one end, and a second extension wall 53 extending from the second body portion 51 to the other end. The second body portion 51 is provided with a plurality of second terminal module receiving slots 511 extending therethrough along a first direction A1-A1. In the illustrated embodiment of the present invention, the second terminal module receiving slots 511 are arranged in multiple rows along a second direction A2-A2. The first extension wall 52 includes a first extension wall portion 54 and a second extension wall portion 55 disposed opposite each other. The second extension wall 53 is provided with a receiving space 535 and a positioning groove 536 located inside the second extension wall 53. The receiving space 535 is configured to at least partially accommodate the first backplane connector 100. The positioning groove 536 engages with the positioning protrusion 14 of the first backplane connector 100 to achieve positioning. The first extension wall portion 54 is provided with a plurality of third slots 541 and a third latching slot 542 communicating with the third slots 541. The second extension wall portion 55 is provided with a plurality of fourth slots 551 and a fourth slot 552 connected to the fourth slots 551. The third slot 541 and the fourth slot 551 extend in the front-to-back direction. The third slot 541 and the fourth slot 551, which are aligned with each other along the third direction A3-A3, are used to accommodate the corresponding second terminal module 6. The third slot 542 and the fourth slot 552 extend in the up-down direction, wherein the third slot 542 passes through the first extension wall portion 54 vertically to connect with the corresponding third slot 541; the fourth slot 552 passes through the second extension wall portion 55 vertically to connect with the corresponding fourth slot 551. In the illustrated embodiment of the present invention, the fourth slot 551 is T-shaped.

[0169] The second terminal module 6 includes a plurality of second cable modules 6a arranged at intervals along the upper and lower directions, a plurality of second shielding sleeves 65 sleeved on the second cable modules 6a, and a second fixing block 69 fixed on the plurality of second cable modules 6a and the second shielding sleeve 65. In one embodiment of the present invention, the second fixing block 69 is made of an insulating material, and is over-molded on the second cable module 6a and the second shielding sleeve 65 to be combined with the second cable module 6a and the second shielding sleeve 65 into a whole. In the embodiment illustrated in the present invention, the second fixing block 69 is embedded in the groove of the second cable module 6a during molding to increase the bonding force between the two. Of course, those skilled in the art will understand that the plurality of second cable modules 6a can also be fixed to the second fixing block 69 by other means such as assembly, and the present invention will not elaborate on this.

[0170] The second fixing block 69 includes a second base 690, a third positioning block 691 protruding upward from the top of the second base 690, and a fourth positioning block 692 protruding downward from the bottom of the second base 690. In the illustrated embodiment of the present invention, the third positioning block 691 is configured to be received in the third slot 541. The third positioning block 691 is further provided with a third recess 6911 vertically connected to the third slot 542. The fourth positioning block 692 is T-shaped and is configured to be received in the fourth slot 551. The fourth positioning block 692 is further provided with a fourth recess 6921 vertically connected to the fourth slot 552.

[0171] In one embodiment of the present invention, the second positioning pins 8 include a plurality of third pins 81 and a plurality of fourth pins 82. Both the third pins 81 and the fourth pins 82 are stamped from sheet metal. The third pins 81 can be provided separately and individually installed in the corresponding third slots 542 and third recesses 6911; the fourth pins 82 can be provided separately and individually installed in the corresponding fourth slots 552 and fourth recesses 6921. Of course, in other embodiments, the third pins 81 can be connected as a whole by a third material strip (not shown), and the fourth pins 82 can be connected as a whole by a fourth material strip (not shown). During assembly, the third pins 81 and the fourth pins 82 are installed as a whole in the corresponding third slots 542 and third recesses 6911, and the fourth slots 552 and fourth recesses 6921, respectively, to improve installation efficiency. After assembly, the third and fourth material strips can be removed or retained as needed. By securing the second terminal module 6 with the third and fourth pins 81 and 82, the second terminal module 6 is prevented from being separated from the second housing 5 in a direction opposite to its assembly direction. Furthermore, this design saves space because the third and fourth pins 81 and 82 can be hidden within the second housing 5, reducing the size of the second backplane connector 200 to a certain extent. Furthermore, it reduces the probability of the third and fourth pins 81 and 82 losing their retaining function due to improper external forces.

[0172] Each second cable module 6a includes an insulator 64, a second terminal module 60 mounted on the insulator 64, a second cable 67 electrically connected to the second terminal module 60, a second shielding clamp 68 clamping the second cable 67, a second covering block 695 at least partially fixed to the second terminal module 60, the second shielding clamp 68, and the second cable 67, and a second shielding sleeve 65 at least partially sleeved over the insulator 64, the second terminal module 60, and the second covering block 695. The technical term "electrical connection" used throughout this utility model refers to contact connection or contactless connection, where contactless connection includes using a transition element to achieve connection between the two.

[0173] In the illustrated embodiment of the present invention, the second covering block 695 is made of an insulating material and is over-molded on the insulator 64 , the second terminal module 60 , the second shielding clamping plate 68 and the second cable 67 to combine them into a whole.

[0174] The second terminal module 60 includes a second retaining block 601 and a plurality of second conductive terminals 62 secured to the second retaining block 601. In one embodiment of the present invention, the second conductive terminals 62 are insert-molded into the second retaining block 601. Of course, in other embodiments, the second conductive terminals 62 may also be secured to the second retaining block 601 through assembly. In the illustrated embodiment of the present invention, the second retaining block 601 includes a second slot 6011 extending along the circumference of the second retaining block 601.

[0175] Please combine Figures 47 to 50 As shown, in the illustrated embodiment of the present invention, each set 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. The second connecting portion 623 is at least partially fixed to the second retaining block 601. The second contact portion 621 extends forward and protrudes from the second retaining block 601 to contact the first conductive terminal 22 of the first backplane connector 100. The second tail portion 622 extends rearward and protrudes from the second retaining block 601 to electrically connect to the second cable 67.

[0176] In one embodiment of the present invention, each second terminal module 60 includes two second conductive terminals 62, both of which are mating signal terminals. The two mating signal terminals form a pair of second differential signal terminals (Differential Pair) to increase the signal transmission rate.

[0177] In the illustrated embodiment of the present invention, the second contact portion 621 of each second conductive terminal 62 has a two-part structure. The second contact portion 621 of each second conductive terminal 62 includes a first elastic arm 6211, a second elastic arm 6212 opposing the first elastic arm 6211, and a connecting wall portion 6213 connecting one side of the first elastic arm 6211 and one side of the second elastic arm 6212. The first elastic arm 6211 includes a first tail portion 6211a connected to the second connecting portion 623 and a first contact arm 6211b extending forward. The first contact arm 6211b has a first end portion 6211c at its distal end. The second elastic arm 6212 includes a second tail portion 6212a abutting the first tail portion 6211a and a second contact arm 6212b extending forward. The second contact arm 6212b has a second end portion 6212c at its distal end. Along the first direction A1 - A1 , the connecting wall portion 6213 is located between the first contact arm 6211 b and the first tail portion 6211 a , and the connecting wall portion 6213 is located between the second contact arm 6212 b and the second tail portion 6212 a .

[0178] In the illustrated embodiment of the present invention, the first elastic arm 6211 and the second elastic arm 6212 are connected to each other only by the connecting wall portion 6213. In other words, a slot 6214 is formed between the first elastic arm 6211 and the second elastic arm 6212 at a position on the second conductive terminal 62 directly opposite the connecting wall portion 6213, thereby providing the first elastic arm 6211 and the second elastic arm 6212 with enhanced elastic deformation capabilities. In the illustrated embodiment of the present invention, the second conductive terminal 62 includes a first clamping space 6210 located between the first elastic arm 6211 and the second elastic arm 6212 to accommodate the first contact portion 221 of the first differential signal terminal of the first backplane connector 100. The first end portion 6211c and the second end portion 6212c together form a bell-mouth shape to guide the first contact portion 221 of the first differential signal terminal into the first clamping space 6210.

[0179] Compared to the prior art, the second conductive terminal 62 of the present invention is provided with a second tail portion 6212a, which is in contact with the first tail portion 6211a. Those skilled in the art will appreciate that when a signal is transmitted via the second elastic arm 6212, the signal can be transmitted via the following path: second elastic arm 6212 → second tail portion 6212a → first tail portion 6211a → second connecting portion 623 → second tail portion 622 → second cable 67. In other words, when a signal is transmitted via the second elastic arm 6212, the signal does not necessarily have to pass through the connecting wall portion 6213 to reach the second cable 67, thereby improving signal transmission efficiency.

[0180] Please combine Figure 43 and Figure 44 As shown, in the illustrated embodiment of the present invention, each of the insulators 64 has a first end face 641, a second end face 642 opposite the first end face 641, and a terminal receiving hole 640 extending along a first direction A1-A1 through the first end face 641 and the second end face 642. In the illustrated embodiment of the present invention, the insulator 64 is generally rectangular and includes a first side wall 643 and a second side wall 644 opposite the first side wall 643. The first side wall 643 further has a plurality of first openings 6431 extending through the first side wall 643 and communicating with the terminal receiving holes 640. The second side wall 644 further has a plurality of second openings 6441 extending through the second side wall 644 and communicating with the terminal receiving holes 640.

[0181] The second cable 67 includes a second core 671 electrically connected to the second tail portion 622 of the second differential signal terminal, a second insulation layer 672 wrapped around the second core 671, and a second shielding layer 673 located outside the second insulation layer 672. In one embodiment of the present invention, the second core 671 is welded to the second tail portion 622 of the second differential signal terminal. In the illustrated embodiment of the present invention, the second shielding layer 673 contacts the second shielding clamp 68.

[0182] Please combine Figure 45 as well as Figure 46As shown, in the illustrated embodiment of the present invention, the second shielding clamping plate 68 is made of a metal material and includes a third clamping plate portion 681 and a fourth clamping plate portion 682. The third clamping plate portion 681 and the fourth clamping plate portion 682 are clamped and fixed to the second cable 67, and both the third clamping plate portion 681 and the fourth clamping plate portion 682 are in contact with the second shielding layer 673. In the illustrated embodiment of the present invention, the second shielding layer 673 is clamped between the third clamping plate portion 681 and the fourth clamping plate portion 682.

[0183] Of course, those skilled in the art will appreciate that the second cable 67 can utilize a cable with a single ground wire, dual ground wires, or no ground wire as known in the art. When the second cable 67 utilizes a cable with a single ground wire or dual ground wires, the ground wire contacts the second shielding clamp 68 to achieve grounding continuity. When the second cable 67 utilizes a cable without a ground wire, the second cable 67 is provided with a shielding layer, which contacts the second shielding clamp 68 to achieve grounding continuity.

[0184] In the illustrated embodiment of the present invention, the third clamping plate portion 681 includes a third clamping portion 6810, a fifth protruding piece 6811 extending from the top end of the third clamping portion 6810, and a sixth protruding piece 6812 extending from the bottom end of the third clamping portion 6810. The third clamping portion 6810 has a curved third inner surface 6810a and a third opening 6810b extending through the third clamping portion 6810.

[0185] The fourth clamping plate portion 682 includes a fourth clamping portion 6820, a seventh protruding piece 6821 extending from the top of the fourth clamping portion 6820, and an eighth protruding piece 6822 extending from the bottom of the fourth clamping portion 6820. The fourth clamping portion 6820 has a curved fourth inner surface 6820a and a fourth opening 6820b extending therethrough.

[0186] The third clamping portion 6810 and the fourth clamping portion 6820 jointly clamp the second cable 67 . The third opening 6810 b and the fourth opening 6820 b can be filled with solder, thereby facilitating welding of the second shielding clamping plate 68 and the second shielding layer 673 .

[0187] In the illustrated embodiment of the present invention, the fifth protrusion 6811 and the seventh protrusion 6821 abut against each other to form a third insertion protrusion 6813. The sixth protrusion 6812 and the eighth protrusion 6822 abut against each other to form a fourth insertion protrusion 6814. The third insertion protrusion 6813 and the fourth insertion protrusion 6814 both contact the second shielding sleeve 65.

[0188] In one embodiment of the present invention, the second covering block 695 is overmolded onto the second terminal block 60, the second shielding clamping plate 68, and the second cable 67, thereby forming a single unit with the second terminal block 60, the second shielding clamping plate 68, and the second cable 67. Specifically, the second covering block 695 is embedded in the second slot 6011 of the second retaining block 601 to improve the reliability of the connection between the two. The third insertion tab 6813 and the fourth insertion tab 6814 extend upward and downward, respectively, protruding from the second covering block 695.

[0189] Please combine Figures 39 to 44 As shown, the second shielding sleeve 65 is at least partially sleeved on the insulator 64, the second terminal module 60 and the second covering block 695 to better shield the second conductive terminal 62. The second shielding sleeve 65 includes a shielding cavity 650, and the insulator 64 and the second terminal module 60 are at least partially located in the shielding cavity 650.

[0190] In the illustrated embodiment of the present invention, the second shielding sleeve 65 includes a first shielding piece 651 and a second shielding piece 652, wherein the first shielding piece 651 and the second shielding piece 652 form a surrounding shielding structure. Preferably, to save costs, the first shielding piece 651 and the second shielding piece 652 can share parts, that is, the first shielding piece 651 and the second shielding piece 652 are the same part with different installation angles.

[0191] The first shielding piece 651 includes a first rear end portion 6511 and a first shielding portion 6512 extending forward from the first rear end portion 6511. A first positioning notch 6511a extending rearward is provided on the side of the first rear end portion 6511. The first positioning notch 6511a is configured to engage with the first positioning protrusion 6951 of the second covering block 695. A first recessed slot 6511b is provided at the top of the first rear end portion 6511, and a second recessed slot 6511c is provided at the bottom of the first rear end portion 6511. A first folding piece 6512a that folds backward is provided at the front end of the first shielding portion 6512. The first folding piece 6512a is located on the inner side of the first shielding portion 6512. Furthermore, the first shielding portion 6512 is provided with a plurality of first openings 6512b extending through the first shielding portion 6512. The first openings 6512b correspond to the first openings 6431 of the insulator 64. The first end portion 6211 c of the first contact arm 6211 b can be elastically deformed in the first opening 6431 and the first opening portion 6512 b.

[0192] Similarly, the second shielding piece 652 includes a second rear end portion 6521 and a second shielding portion 6522 extending forward from the second rear end portion 6521. A second positioning notch 6521a extending rearward is provided on the side of the second rear end portion 6521. The second positioning notch 6521a is configured to engage with the second positioning protrusion 6952 of the second covering block 695. A third recessed slot 6521b is provided on the top of the second rear end portion 6521, and a fourth recessed slot 6521c is provided on the bottom of the second rear end portion 6521. A second folded piece 6522a is further provided at the front end of the second shielding portion 6522, folded back and forth, and located on the inner side of the second shielding portion 6522. Furthermore, a plurality of second openings 6522b extending through the second shielding portion 6522 correspond to the second openings 6441 of the insulator 64. The second end portion 6212 c of the second contact arm 6212 b can be elastically deformed in the second opening 6441 and the second opening 6522 b .

[0193] When the first shielding sheet 651 and the second shielding sheet 652 cooperate with each other, the first shielding portion 6512 and the second shielding portion 6522 enclose the surrounding shielding cavity 650. The first recessed slot 6511b and the third recessed slot 6521b together form a third clamping slot 653 for accommodating the third insertion tab 6813. The second recessed slot 6511c and the fourth recessed slot 6521c together form a fourth clamping slot 654 for accommodating the fourth insertion tab 6814. The first folding piece 6512a and the second folding piece 6522a are both exposed within the shielding cavity 650 and are used to adjust impedance, thereby reducing the amplitude of impedance variation and improving signal transmission quality.

[0194] During assembly, the second terminal module 60 and the second cable 67 are welded and fixed; then, the second covering block 695 is molded on the second terminal module 60 and the second cable 67; then, the second terminal module 60 is at least partially inserted into the insulator 64, so that the first contact arm 6211b and the second contact arm 6212b of the second conductive terminal 62 are inserted into the corresponding terminal receiving hole 640; then, the first shielding sheet 651 and the second shielding sheet 652 are installed on the insulator 64 and the second covering block 695; the third insertion protrusion 6813 is located in the third clamping groove 653, and the fourth insertion protrusion 6814 is located in the fourth clamping groove 654, so that the second shielding clamping plate 68 is in contact with the second shielding sleeve 65 to improve the shielding effect; then, the second fixing block 69 is fixed to the second cable module 6a and the second shielding sleeve 65; finally, the second terminal module 6 and the second shell 5 are assembled and fixed by the second positioning pin 8.

[0195] Please combine Figure 1 as well as Figures 51 to 60As shown, when the first backplane connector 100 is docked with the second backplane connector 200 , the first backplane connector 100 is at least partially inserted into the receiving space 535 of the second backplane connector 200 ; the second shielding sleeve 65 is inserted into the shielding cavity 260 . During the process of inserting the second shielding sleeve 65 into the shielding cavity 260, the second shielding sleeve 65 first contacts the first elastic arm 265a1 of the first elastic piece 265a, the fifth elastic arm 266a1 of the third elastic piece 266a, the first abutting elastic arm 2671 of the first abutting elastic piece 267 and the third abutting elastic arm 2681 of the second abutting elastic piece 268 along the first direction A1-A1; as the second shielding sleeve 65 is further inserted, the second shielding sleeve 65 contacts the second elastic arm 265a2 of the first elastic piece 265a, the sixth elastic arm 266a2 of the third elastic piece 266a, the second abutting elastic arm 2672 of the first abutting elastic piece 267 and the fourth abutting elastic arm 2682 of the second abutting elastic piece 268. With this configuration, the extended shielding shell assembly 26 provides two layers of grounding contact points along the first direction A1-A1. The first layer of grounding contact points includes the first elastic arm 265a1 of the first elastic piece 265a, the fifth elastic arm 266a1 of the third elastic piece 266a, the first abutting elastic arm 2671 of the first abutting elastic piece 267, and the third abutting elastic arm 2681 of the second abutting elastic piece 268. The second layer of grounding contact points includes the second elastic arm 265a2 of the first elastic piece 265a, the sixth elastic arm 266a2 of the third elastic piece 266a, the second abutting elastic arm 2672 of the first abutting elastic piece 267, and the fourth abutting elastic arm 2682 of the second abutting elastic piece 268. This configuration improves the grounding shielding effect and signal transmission quality when the second backplane connector 200 is mated with the first backplane connector 100.

[0196] Please combine Figure 54 As shown, in the illustrated embodiment of the present invention, the height of the first shielding sleeve 25 along the vertical direction is approximately the same as the height of the second shielding sleeve 65 along the vertical direction. When the second backplane connector 200 is mated with the first backplane connector 100, the first contact portion 221 of the first signal terminal S1 and the first contact portion 221 of the second signal terminal S2 are respectively inserted into the first clamping space 6210 of the second conductive terminal 62 to achieve electrical conduction. When the second backplane connector 200 is mated with the first backplane connector 100, the second shielding sleeve 65 does not contact the first shielding sleeve 25 along the first direction A1-A1.

[0197] Please combine Figures 61 to 68As shown, the second embodiment of the present invention discloses a first backplane connector 100 , which is used to be mounted on a circuit board 301 .

[0198] Please combine Figure 62 As shown, in the second illustrated embodiment of the present invention, the circuit board 301 includes a plurality of first signal terminal mounting holes 3011, a plurality of second signal terminal mounting holes 3012, a plurality of first ground terminal mounting holes 3013, and a plurality of second ground terminal mounting holes 3014. In the illustrated embodiment of the present invention, the plurality of first signal terminal mounting holes 3011, the plurality of second signal terminal mounting holes 3012, the plurality of first ground terminal mounting holes 3013, and the plurality of second ground terminal mounting holes 3014 are arranged in a matrix. Adjacent first signal terminal mounting holes 3011 and second signal terminal mounting holes 3012 along the first direction A1-A1 form a group of signal differential pair terminal mounting holes. Each group of signal differential pair terminal mounting holes is provided with a first ground terminal mounting hole 3013 and a second ground terminal mounting hole 3014 at both ends, respectively, to improve signal transmission quality. In the illustrated embodiment of the present invention, the first signal terminal mounting hole 3011, the second signal terminal mounting hole 3012, the first ground terminal mounting hole 3013, and the second ground terminal mounting hole 3014 are all conductive holes, i.e., conductive material is formed on the inner walls of the holes. When the tail ends of the conductive terminals come into contact with the conductive material, electrical conduction is established with the circuit board 301. The shape and size of the conductive holes, as well as whether they extend through the circuit board 301, can be flexibly designed as needed and are not further elaborated herein.

[0199] The first backplane connector 100 in the second embodiment of the present invention includes a first shell 1, a plurality of first terminal modules 2 mounted on the first shell 1, a plurality of retaining plates 3 for retaining the plurality of first terminal modules 2 together, and a retaining block 4 for retaining the bottom ends of the plurality of first terminal modules 2.

[0200] The first backplane connector 100 in the second embodiment of the present invention is substantially the same as the first backplane connector 100 in the first embodiment of the present invention. For the identical or corresponding parts between the two, please refer to the description of the first backplane connector 100 in the first embodiment. Only the main differences between the two are described below.

[0201] In the second embodiment of the first backplane connector 100 of the present invention, each set 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. The first tail portion 222 of the first ground terminal G1 and the first tail portion 222 of the second ground terminal G2 are both provided with fisheye holes, which provide a certain degree of elastic deformation, so that the first tail portion 222 of the first ground terminal G1 can be inserted into the first ground terminal mounting hole 3013 along the installation direction (third direction A3-A3), and the first tail portion 222 of the second ground terminal G2 can be inserted into the second ground terminal mounting hole 3014 along the installation direction.

[0202] The first tail portion 222 of the first signal terminal S1 includes a first serpentine portion 2221 and a first distal portion 2222 further extending from the first serpentine portion 2221 along the installation direction.

[0203] Similarly, the first tail portion 222 of the second signal terminal S2 includes a second serpentine portion 2223 and a second distal portion 2224 further extending from the second serpentine portion 2223 along the installation direction.

[0204] In a second embodiment of the first backplane connector 100 of the present invention, the first backplane connector 100 further includes a mounting block 2225 fixed to the first tail portion 222 of the first signal terminal S1 and the first tail portion 222 of the second signal terminal S2 to form the first differential signal terminal into a whole.

[0205] Please combine Figures 66 to 68 As shown, the first serpentine portion 2221 includes a plurality of first units 2221a, a second unit 2221b and a third unit 2221c connected to each other. In the embodiment shown in the figure of the present invention, the first unit 2221a, the second unit 2221b and the third unit 2221c are all H-shaped.

[0206] The first unit 2221a includes a first crossbeam 2221a1, a first longitudinal beam 2221a2 located at one end of the first crossbeam 2221a1, and a second longitudinal beam 2221a3 located at the other end of the first crossbeam 2221a1. The ends of the first longitudinal beam 2221a2 and the second longitudinal beam 2221a3 extend upward and downward along the installation direction, respectively, protruding from the first crossbeam 2221a1. In other words, the first unit 2221a includes a first U-shaped recessed opening 2221a4 located at the upper portion of the first crossbeam 2221a1, and a second U-shaped recessed opening 2221a5 located at the lower portion of the first crossbeam 2221a1.

[0207] Similarly, the second unit 2221b includes a second cross-beam portion 2221b1, a third longitudinal beam portion 2221b2 located at one end of the second cross-beam portion 2221b1, and a fourth longitudinal beam portion 2221b3 located at the other end of the second cross-beam portion 2221b1. The ends of the third longitudinal beam portion 2221b2 and the fourth longitudinal beam portion 2221b3 extend upward and downward along the installation direction, respectively, protruding from the second cross-beam portion 2221b1. In other words, the second unit 2221b includes a third U-shaped recessed opening 2221b4 located at the upper portion of the second cross-beam portion 2221b1, and a fourth U-shaped recessed opening 2221b5 located at the lower portion of the second cross-beam portion 2221b1.

[0208] The third unit 2221c includes a third crossbeam 2221c1, a fifth longitudinal beam 2221c2 located at one end of the third crossbeam 2221c1, and a sixth longitudinal beam 2221c3 located at the other end of the third crossbeam 2221c1. The ends of the fifth longitudinal beam 2221c2 and the sixth longitudinal beam 2221c3 extend upward and downward along the installation direction, respectively, protruding from the third crossbeam 2221c1. In other words, the third unit 2221c includes a fifth U-shaped recess 2221c4 located above the third crossbeam 2221c1 and a sixth U-shaped recess 2221c5 located below the third crossbeam 2221c1.

[0209] In the illustrated embodiment of the present invention, the first crossbeam 2221a1, the second crossbeam 2221b1, and the third crossbeam 2221c1 are arranged in sequence along the installation direction; the first longitudinal beam 2221a2, the third longitudinal beam 2221b2, and the fifth longitudinal beam 2221c2 are arranged in sequence along the installation direction; the second longitudinal beam 2221a3, the fourth longitudinal beam 2221b3, and the sixth longitudinal beam 2221c3 are arranged in sequence along the installation direction. The second longitudinal beam 2221a3 is connected to the fourth longitudinal beam 2221b3, the third longitudinal beam 2221b2 is connected to the fifth longitudinal beam 2221c2, the second recess 2221a5 is connected to the third recess 2221b4, and the fourth recess 2221b5 is connected to the fifth recess 2221c4. When the first tail portion 222 of the first signal terminal S1 is not mounted on the circuit board 301, the first serpentine portion 2221 includes a first slit 2221d1 located between the first longitudinal beam portion 2221a2 and the third longitudinal beam portion 2221b2, and a second slit 2221d2 located between the fourth longitudinal beam portion 2221b3 and the sixth longitudinal beam portion 2221c3. The first slit 2221d1 and the second slit 2221d2 are arranged sequentially along the mounting direction and are staggered along the mounting direction.

[0210] The second serpentine portion 2223 is symmetrically arranged with respect to the first serpentine portion 2221 (for example, bilaterally symmetrically arranged), which will not be described in detail in the present invention.

[0211] In the illustrated embodiment of the present invention, both the first distal portion 2222 and the second distal portion 2224 are triangular and solid. When the first tail portion 222 of the first signal terminal S1 and the first tail portion 222 of the second signal terminal S2 are installed in the first signal terminal mounting hole 3011 and the second signal terminal mounting hole 3012, respectively, along the installation direction, the first distal portion 2222 and the second distal portion 2224 are at least partially inserted into the first signal terminal mounting hole 3011 and the second signal terminal mounting hole 3012, respectively, along the installation direction, thereby achieving electrical conduction with the circuit board 301. Since the lengths of the first tip portion 2222 and the second tip portion 2224 are relatively short, when the first tail portion 222 of the first signal terminal S1 and the first tail portion 222 of the second signal terminal S2 are respectively installed in the first signal terminal mounting hole 3011 and the second signal terminal mounting hole 3012 along the installation direction, the first serpentine portion 2221 of the first signal terminal S1 and the second serpentine portion 2223 of the second signal terminal S2 are subjected to the reaction force of the circuit board 301 and undergo a certain elastic compression along the installation direction, and the positive force is controlled to avoid excessive compression of the first serpentine portion 2221 of the first signal terminal S1 and the second serpentine portion 2223 of the second signal terminal S2. Preferably, the first slit 2221d1 and the second slit 2221d2 are zero, that is, the first longitudinal beam portion 2221a2 and the third longitudinal beam portion 2221b2 are in contact with each other along the installation direction, and the fourth longitudinal beam portion 2221b3 and the sixth longitudinal beam portion 2221c3 are in contact with each other along the installation direction, so as to reduce the signal flow path. With this configuration, when the first tail portion 222 of the first signal terminal S1 is transmitting a signal, the signal can be transmitted through the following parallel paths:

[0212] Path 1: first longitudinal beam portion 2221a2 → third longitudinal beam portion 2221b2 → the fifth longitudinal beam portion 2221c2 → ... → first distal portion 2222 → circuit board 301;

[0213] Path two: second longitudinal beam portion 2221 a 3 → fourth longitudinal beam portion 2221 b 3 → sixth longitudinal beam portion 2221 c 3 → … → first distal portion 2222 → circuit board 301 .

[0214] Those skilled in the art will appreciate that in the illustrated embodiment of the present invention, the first tail portion 222 of the first ground terminal G1 and the first tail portion 222 of the second ground terminal G2 both extend downward beyond the first tip portion 2222 and the second tip portion 2224 . Although the first tip portion 2222 and the second tip portion 2224 are short and inelastic, the first tail portion 222 of the first ground terminal G1 and the first tail portion 222 of the second ground terminal G2 are long and elastic; when the first tail portion 222 of the first ground terminal G1 and the first tail portion 222 of the second ground terminal G2 are respectively inserted into the first ground terminal mounting hole 3013 and the second ground terminal mounting hole 3014, the first tail portion 222 of the first ground terminal G1 and the first tail portion 222 of the second ground terminal G2 are interference fit with the first ground terminal mounting hole 3013 and the second ground terminal mounting hole 3014, respectively, and the interference force generated thereby can keep the first tip portion 2222 of the first signal terminal S1 and the second tip portion 2224 of the second signal terminal S2 in the first signal terminal mounting hole 3011 and the second signal terminal mounting hole 3012, respectively. At the same time, the first tip portion 2222 of the first signal terminal S1 and the second tip portion 2224 of the second signal terminal S2 can be designed to be shorter to reduce installation difficulty and improve signal transmission quality.

[0215] Please combine Figures 69 to 78 As shown, the third embodiment of the present invention disclosed herein includes a backplane connector assembly, which includes a first backplane connector 100 and a second backplane connector 200 that mates with the first backplane connector 100. In the third embodiment of the present invention, the first backplane connector 100 and the second backplane connector 200 are both cable backplane connectors. In the third embodiment of the present invention, the first backplane connector 100 and the second backplane connector 200 are plugged in along a first direction A1-A1 (mating direction) to achieve signal transmission. In the third embodiment of the present invention, the first direction A1-A1 is a front-to-back direction.

[0216] The first backplane connector 100 includes a first housing 1, a plurality of first terminal modules 2 mounted on the first housing 1, and first positioning pins 3 for positioning the first terminal modules 2 within the first housing 1. For simplicity of description, identical reference numerals represent identical or corresponding features in the first backplane connector 100 of the third embodiment of the present invention and the first backplane connector 100 of the first embodiment of the present invention. Furthermore, the second backplane connector 200 of the third embodiment of the present invention is identical to the second backplane connector 200 of the first embodiment of the present invention and will not be further described herein.

[0217] Please refer to Figures 70 to 72 As shown, in the third embodiment of the present invention illustrated in the drawings, the first shell 1 is made of an insulating material and includes a first body portion 11, a first wall portion 12 extending rearward from one end (e.g., the upper end) of the first body portion 11, and a second wall portion 13 extending rearward from the other opposite end (e.g., the lower end) of the first body portion 11. The first body portion 11 is provided with a docking surface 111 and a plurality of terminal receiving grooves 112 extending through the docking surface 111. In the embodiment illustrated in the drawings of the present invention, the terminal receiving grooves 112 are arranged in multiple rows along the third direction A3-A3. The first wall portion 12 is provided with a plurality of first slots 121 and a first card slot 123 communicating with the first slots 121. In the embodiment illustrated in the drawings of the present invention, the first card slot 123 is communicated with the first slot 121, and the first card slot 123 extends through the first wall portion 12 in the vertical direction. The second wall portion 13 is provided with a plurality of second slots 131 and a second card slot 133 communicating with the second slots 131. In the illustrated embodiment of the present invention, the second engaging slot 133 communicates with the second slot 131 and extends vertically through the second wall portion 13. The first slot 121 and the second slot 131 extend along a first direction A1-A1. The first slot 121 and the second slot 131, which are aligned vertically, are used to accommodate the corresponding first terminal module 2.

[0218] Please combine Figure 72 As 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 mating surface 111. The positioning protrusions 14 are provided with guiding slopes 141 at their ends. The positioning protrusions 14 are configured to be inserted into the positioning grooves 536 of the second backplane connector 200.

[0219] Each first terminal module 2 includes a plurality of first cable modules 2a spaced apart along a third direction A3-A3, a plurality of first shielding sleeves 25 sleeved on the first cable modules 2a, a first fixing block 29 fixed to the plurality of first cable modules 2a and the first shielding sleeves 25, and an extended shielding shell assembly 26 that cooperates with the first shielding sleeve 25. In one embodiment of the present invention, the first fixing block 29 is made of an insulating material and is overmolded onto the plurality of first cable modules 2a and the plurality of first shielding sleeves 25 to form a single unit with the plurality of first cable modules 2a and the plurality of first shielding sleeves 25. In the illustrated embodiment of the present invention, the first fixing block 29 is embedded in a groove of the first cable module 2a during molding to increase the bonding strength between the two. Of course, those skilled in the art will understand that the plurality of first cable modules 2a can also be fixed to the first fixing block 29 by other means such as assembly, and this invention will not elaborate on this.

[0220] The first fixing block 29 includes a first base 290, a first positioning block 291 extending upward from the top of the first base 290, and a second positioning block 292 extending downward from the bottom of the first base 290. The first positioning block 291 is configured to be inserted into the first slot 121. The first positioning block 291 has a first notch 2911 vertically connected to the first latching slot 123. The second positioning block 292 is configured to be inserted into the second slot 131. The second positioning block 292 has a second notch 2921 vertically connected to the second latching slot 133.

[0221] In one embodiment of the present invention, the first positioning pins 3 include a plurality of first pins 31 and a plurality of second pins 32. Both the first pins 31 and the second pins 32 are stamped from sheet metal. In one embodiment of the present invention, the first pins 31 can be provided separately and individually installed in the corresponding first slots 123 and first recesses 2911; the second pins 32 can be provided separately and individually installed in the corresponding second slots 133 and second recesses 2921. Of course, in other embodiments of the present invention, the plurality of first pins 31 can also be connected as a whole by a first material strip (not shown), and the plurality of second pins 32 can also be connected as a whole by a second material strip (not shown). During assembly, the first pins 31 and the second pins 32 are respectively installed as a whole in the corresponding first slots 123 and first notches 2911, and second slots 133 and second notches 2921, to improve installation efficiency. After assembly, the first and second material strips can be removed or retained as needed. By using the first and second pins 31 and 32 to secure the first terminal module 2, it is possible to prevent the first terminal module 2 from detaching from the first housing 1 in a direction opposite to its assembly direction. In addition, since the first and second pins 31 and 32 can be hidden in the first housing 1, this design saves space, reduces the size of the first backplane connector 100 to a certain extent, and reduces the probability of the first and second pins 31 and 32 losing their retaining function due to improper external forces.

[0222] In the embodiment illustrated in the diagram of the present invention, each first cable module 2a includes a first terminal module 20, a plurality of first cables 27 connected to the first terminal module 20, a first shielding clamp 28 cooperating with the first cable 27, and a first covering block 295 at least partially fixed on the first terminal module 20, the first shielding clamp 28 and the first cable 27.

[0223] In the illustrated embodiment of the present invention, the first terminal module 20 includes a first retaining block 201 and a plurality of first conductive terminals 22 fixed to the first retaining block 201. In one embodiment of the present invention, the first retaining block 201 is made of an insulating material, and the first conductive terminals 22 are insert-molded into the first retaining block 201. Of course, in other embodiments, the first conductive terminals 22 can also be fixed to the first retaining block 201 by assembly. In the illustrated embodiment of the present invention, the first retaining block 201 includes a first slot 2011, which extends along the circumference of the first retaining block 201.

[0224] Each set 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. The first connecting portion 223 is fixed to the first retaining block 201. The first contact portion 221 is needle-shaped and protrudes forward from the first retaining block 201 to mate with the second backplane connector 200. The first tail portion 222 extends rearward from the first retaining block 201 to electrically connect to the first cable 27. In the illustrated embodiment of the present invention, the first conductive terminals 22 are generally straight and extend in the front-to-back direction.

[0225] In one embodiment of the present invention, the first conductive terminal 22 in each first terminal module 20 includes a first signal terminal S1 and a second signal terminal S2, wherein the first signal terminal S1 and the second signal terminal S2 form a pair of first differential signal terminals (Differential Pair) to increase the signal transmission rate. The first cable 27 includes a first core 271 for electrically connecting to the first tail 222 of the first differential signal terminal, a first insulating layer 272 wrapped around the first core 271, and a first shielding layer 273 located on the outer layer of the first insulating layer 272. In one embodiment of the present invention, the first core 271 is welded and fixed to the first tail 222 of the first differential signal terminal. In the illustrated embodiment of the present invention, the first shielding layer 273 is in contact with the first shielding clamp 28.

[0226] In the illustrated embodiment of the present invention, the first shielding plate 28 is made of metal and includes a first plate portion 281 and a second plate portion 282. The first plate portion 281 and the second plate portion 282 are clamped and fixed to the first cable 27, and both the first plate portion 281 and the second plate portion 282 are in contact with the first shielding layer 273. In the illustrated embodiment of the present invention, the first shielding layer 273 is clamped between the first plate portion 281 and the second plate portion 282.

[0227] Of course, those skilled in the art will appreciate that the first cable 27 can utilize a cable with a single ground wire, dual ground wires, or no ground wire as known in the art. When the first cable 27 utilizes a cable with a single ground wire or dual ground wires, the ground wire contacts the first shielding clamp 28 to achieve grounding continuity. When the first cable 27 utilizes a cable without a ground wire, the first cable 27 is provided with a shielding layer, which contacts the first shielding clamp 28 to achieve grounding continuity.

[0228] In the illustrated embodiment of the present invention, the first clamping plate portion 281 includes a first clamping portion 2810, a first protruding piece 2811 extending from the top end of the first clamping portion 2810, and a second protruding piece 2812 extending from the bottom end of the first clamping portion 2810. The first clamping portion 2810 has a curved first inner surface 2810a and a first opening 2810b extending through the first clamping portion 2810.

[0229] The second clamping plate portion 282 includes a second clamping portion 2820, a third protruding piece 2821 extending from the top of the second clamping portion 2820, and a fourth protruding piece 2822 extending from the bottom of the second clamping portion 2820. The second clamping portion 2820 has a curved second inner surface 2820a and a second opening 2820b extending through the second clamping portion 2820.

[0230] The first clamping portion 2810 and the second clamping portion 2820 jointly clamp the first cable 27 . The first opening 2810 b and the second opening 2820 b can be filled with solder, thereby facilitating welding of the first shielding clamping plate 28 and the first shielding layer 273 .

[0231] In the illustrated embodiment of the present invention, the first protruding portion 2811 and the third protruding portion 2821 abut against each other to form a first insertion protruding portion 2813. The second protruding portion 2812 and the fourth protruding portion 2822 abut against each other to form a second insertion protruding portion 2814. Both the first insertion protruding portion 2813 and the second insertion protruding portion 2814 are in contact with the first shielding sleeve 25.

[0232] In one embodiment of the present invention, the first covering block 295 is overmolded onto the first terminal module 20, the first shielding clamping plate 28, and the first cable 27, thereby forming a single unit with the first terminal module 20, the first shielding clamping plate 28, and the first cable 27. Specifically, the first covering block 295 is embedded in the first slot 2011 of the first retaining block 201 to improve the reliability of the connection between the two. The first insertion tab 2813 and the second insertion tab 2814 extend upward and downward, respectively, protruding from the first covering block 295.

[0233] In the illustrated embodiment of the present invention, the first shielding sleeve 25 includes a cylindrical portion 257 that is at least partially sleeved onto the first covering block 295, and a sleeve portion 258 connected to the cylindrical portion 257. The sleeve portion 258 includes a first clamping groove 251 and a second clamping groove 252. In the illustrated embodiment of the present invention, the first clamping groove 251 is used to insert the first insertion tab 2813, and the clamping groove 252 is used to insert the second insertion tab 2814.

[0234] Technicians in the relevant technical field can understand that in the embodiment illustrated in the present utility model, the first shielding layer 273 is in contact with the first shielding clamping plate 28, and the first shielding clamping plate 28 is in contact with the first shielding sleeve 25. In this way, the first shielding layer 273, the first shielding clamping plate 28 and the first shielding sleeve 25 form a grounded shielding structure connected in series, thereby improving the quality of signal transmission.

[0235] The extended shield shell assembly 26 of the first backplane connector 100 in the third embodiment of the present invention is identical to the extended shield shell assembly 26 of the first backplane connector 100 in the first embodiment of the present invention, and the present invention will not further describe this. Those skilled in the art will appreciate that designing the extended shield shell assembly 26 in the form of the present invention allows for the use of as many common parts as possible, regardless of whether the first backplane connector 100 is the board-end backplane connector in the first embodiment or the cable backplane connector in the third embodiment.

[0236] The above embodiments 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 technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that technical personnel in the relevant technical field can still modify or replace the present invention with equivalents, and all technical solutions and improvements 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 connector, characterized in that: include: a second shell; as well as a second terminal module, the second terminal module being disposed in the second housing; The second terminal module includes a second cable module and a second shielding sleeve sleeved on the second cable module, and the second cable module includes a second terminal module and a second cable electrically connected to the second terminal module; The second shielding sleeve includes a shielding cavity, and the second terminal module is at least partially located in the shielding cavity; The second shielding sleeve includes a first shielding piece and a second shielding piece, wherein the first shielding piece and the second shielding piece are separately provided, and the first shielding piece and the second shielding piece are assembled into a surrounding shielding structure.

2. The connector according to claim 1, wherein: The first shielding piece includes a first rear end portion and a first shielding portion extending forward from the first rear end portion. A first folding piece that is folded back and forth is further provided at the front end of the first shielding portion. The first folding piece is exposed in the shielding cavity.

3. The connector according to claim 2, wherein: The second shielding piece includes a second rear end portion and a second shielding portion extending forward from the second rear end portion. The front end of the second shielding portion is further provided with a second folding piece that is folded back and forth, and the second folding piece is exposed in the shielding cavity.

4. The connector according to claim 3, wherein: The second terminal module includes a second covering block at least partially fixed on the second terminal module and the second cable, and the second covering block includes a first positioning protrusion and a second positioning protrusion located on both sides; The first rear end portion is provided with a first positioning recess that is locked with the first positioning protrusion, and the second rear end portion is provided with a second positioning recess that is locked with the second positioning protrusion.

5. The connector according to claim 3, wherein: A first concave slot is provided on the top of the first rear end portion, and a second concave slot is provided on the bottom of the first rear end portion; A third concave slot is provided at the top of the second rear end portion, and a fourth concave slot is provided at the bottom of the second rear end portion; When the first shielding piece and the second shielding piece cooperate with each other, the first concave slot and the third concave slot together form a third clamping slot, and the second concave slot and the fourth concave slot together form a fourth clamping slot; The second terminal module includes a second shielding clamping plate for clamping the second cable, and the second shielding clamping plate includes a third insertion protrusion inserted into the third clamping groove and a fourth insertion protrusion inserted into the fourth clamping groove.

6. The connector according to claim 1, wherein: The second terminal module includes a second holding block and a plurality of second conductive terminals fixed to the second holding block; each second conductive terminal includes a second contact portion, a second tail portion, and a second connecting portion connecting the second contact portion and the second tail portion; the second tail portion is connected to the second cable; The second contact portion of each second conductive terminal includes a first elastic arm, a second elastic arm opposite to the first elastic arm, and a connecting wall portion connecting one side of the first elastic arm and one side of the second elastic arm; The first elastic arm includes a first contact arm, and the first contact arm is provided with a first end portion located at an end thereof; The second elastic arm includes a second contact arm, and the second contact arm is provided with a second end portion located at an end thereof; The second terminal module also includes an insulator, which includes a first side wall, a second side wall opposite to the first side wall, and a terminal receiving hole. The second contact portion of the second conductive terminal is received in the terminal receiving hole. The first side wall is also provided with a first opening passing through the first side wall. The second side wall is also provided with a second opening passing through the second side wall. The first end portion of the first contact arm is configured to be able to undergo elastic deformation in the first opening, and the second end portion of the second contact arm is configured to be able to undergo elastic deformation in the second opening.

7. The connector according to claim 6, wherein: The first shielding piece is provided with a first opening portion penetrating the first shielding piece, the first opening portion corresponding to the first opening of the insulator; the first end portion of the first contact arm is configured to be elastically deformable in the first opening and the first opening portion; The second shielding piece includes a second opening portion penetrating the second shielding piece, and the second opening portion corresponds to the second opening of the insulator; The second distal end portion of the second contact arm is configured to be elastically deformable in the second opening and the second opening portion.

8. The connector according to claim 6, wherein: The second holding block includes a second slot, and the second slot extends along the circumference of the second holding block; The second terminal module includes a second covering block at least partially fixed on the second holding block and the second cable, and the second covering block is embedded in the second slot of the second holding block.

9. The connector according to claim 1, wherein: The second terminal module includes a second fixing block fixed to the second cable module and the second shielding sleeve; The second housing includes a second body portion, a first extension wall extending from the second body portion to one end, and a second extension wall extending from the second body portion to the other end; the second extension wall is provided with a receiving space for receiving the first backplane connector; the second body portion is provided with a second terminal module receiving groove extending through the second body portion and communicating with the second body portion; The second shielding sleeve of the second terminal module at least partially passes through the second terminal module receiving groove to extend into the receiving space.

10. The connector according to claim 1, wherein: The first shielding piece and the second shielding piece may share common parts.

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