Shielding Unit, Communication Module and Backplane Connector Plug

Abstract

The present invention relates to a shielding unit, a communication module, and a backplane connector plug. The shielding unit includes: edge shielding sheets, the number of the edge shielding sheets is two, the two edge shielding sheets are arranged at intervals, each edge shielding sheet includes an edge substrate, edge contacts, and edge connectors, the edge contacts are arranged at intervals on one edge of the edge substrate, the edge connectors are arranged at intervals on the other edge of the edge substrate, through holes are formed in the edge substrate, the edge shielding sheets are divided into a plurality of shielding columns arranged at intervals, and the edge contacts, the edge connectors, and the through holes form the shielding columns; and an intermediate shielding sheet, including an intermediate substrate, an intermediate partition, and intermediate contacts, intermediate contacts for abutting against the edge contacts are arranged on two opposite edges of the intermediate substrate, and the intermediate partition is connected to the intermediate substrate and is located between the edge contacts of the two edge shielding sheets. In this way, the shielding effect of the shielding unit can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of communication devices, and particularly to a shielding unit, a communication module including the shielding unit, and a backplane connector socket. Background Art

[0002] A backplane connector plug can bridge the flow of current between circuit boards. Due to the increasing bandwidth requirements of communication terminals such as switches, routers, modems, and user access terminal devices, higher requirements are imposed on the high-speed transmission of connector signals and signal integrity. Differential signals have been widely used due to their good transmission performance. However, for traditional backplane connector sockets, there are usually still defects in which differential signals interfere with each other, thus affecting the signal transmission performance of the backplane connector plug. Summary of the Invention

[0003] One technical problem solved by the present invention is how to reduce signal interference to improve the shielding effect.

[0004] A shielding unit includes:

[0005] Edge shielding sheets, the number of the edge shielding sheets is two, the two edge shielding sheets are arranged at intervals, each edge shielding sheet includes an edge substrate, edge contacts, and edge joints, the edge contacts are arranged at intervals on one edge of the edge substrate, the edge joints are arranged at intervals on the other edge of the edge substrate, through holes are formed in the edge substrate, and the edge shielding sheet is divided into a plurality of shielding columns arranged at intervals, and the edge contacts, the edge joints, and the through holes form the shielding columns; and

[0006] A middle shielding sheet, including a middle substrate, a middle partition, and middle contacts, the middle contacts for abutting against the edge contacts are arranged on two opposite edges of the middle substrate, and the middle partition is connected to the middle substrate and is located between the edge contacts of the two edge shielding sheets.

[0007] In one embodiment, taking the extending direction of the edge contacts as a reference direction, the extending length of the edge contacts is less than or equal to the extending length of the middle partition in the reference direction.

[0008] In one embodiment, the middle contacts are sandwiched between the edge contacts of the two edge shielding sheets.

[0009] In one embodiment, through holes penetrating through the middle partition in the thickness direction are formed in the middle partition.

[0010] In one embodiment, the intermediate substrate includes an intermediate bearing section and two end bearing sections. The two end bearing sections are bent and connected to opposite ends of the intermediate bearing section. The intermediate bearing section extends along the spacing direction of the edge contacts on the same edge shielding sheet. The intermediate partition is connected to the intermediate bearing section and / or the edge bearing section.

[0011] In one embodiment, the intermediate partition is detachably connected to the intermediate substrate.

[0012] In one embodiment, the edge shielding sheet further includes shielding rings, which correspond to the through holes one by one. The shielding rings protrude and are fixed on the edge substrate and are arranged around the through holes.

[0013] In one embodiment, the shielding ring has side plates that define the spacing space between two adjacent shielding columns. Through holes penetrating the side plates in the thickness direction are formed in the side plates. The number of the through holes is multiple, and the multiple through holes are arranged in a matrix.

[0014] A communication module includes a signal group, an insulating carrier, and the shielding unit according to any one of the above. The two edge shielding sheets are denoted as a first edge shielding sheet and a second edge shielding sheet. The insulating carrier is disposed on the surface of the first edge shielding sheet facing the second edge shielding sheet. The insulating carrier is disposed on the surface of the second edge shielding sheet facing away from the first edge shielding sheet. The signal group is connected to the insulating carrier and is located between two adjacent shielding columns of the same edge shielding sheet. The signal group includes two differential signals with opposite signal polarities.

[0015] A backplane connector socket includes a housing and a plurality of the above communication modules. A plurality of mounting grooves are formed in the housing. The mounting grooves correspond to the communication modules one by one, and the communication modules are matched with the mounting grooves.

[0016] A technical effect of an embodiment of the present invention is that when the signal group is located in the spacing space between two adjacent shielding columns, the signal group does not contact the shielding columns and maintains a certain distance. In view of the edge contacts to reduce the mutual crosstalk of signals between adjacent signal groups corresponding to the same edge shielding sheet, the edge joints can also reduce the mutual crosstalk of signals between adjacent signal groups corresponding to the same edge shielding sheet. Therefore, the shielding columns can reduce signal interference, thereby improving the shielding effect of the shielding unit.

[0017] Since each signal has a return current and the edge substrate serves as part of the return path for the return current, considering that vias are provided on the edge substrate, the return path of the return current is increased. The non-via portions on the edge substrate are interconnected, enabling the return current to switch between different return paths on the edge substrate, which can reduce the radiation effect of the electric field, thereby reducing crosstalk between signals and alleviating the impact caused by impedance mutations. The inductive mutations suffered by the signals are reduced, thereby improving signal transmission, reducing fluctuations in insertion loss, and improving resonance.

[0018] Considering that the middle contact of the middle shielding sheet abuts between the first edge contact and the second edge contact, the return current is thus electrically interconnected through the middle shielding sheet, ensuring the common-ground interconnection of the signal loop, improving the return effect, and being conducive to increasing the signal transmission speed to avoid signal interference between signal groups. At the same time, the middle partition is located between the first edge contact and the second edge contact. In this way, through the partitioning effect of the middle partition, signal crosstalk between signal groups corresponding to two different edge shielding sheets can be effectively prevented, thereby further improving the shielding effect of the shielding unit on signals. Moreover, the middle partition also plays a role in further improving the return effect and is also conducive to increasing the signal transmission speed. Description of the Drawings

[0019] Figure 1 Schematic perspective view of the backplane connector plug provided for an embodiment;

[0020] Figure 2 For Figure 1 Exploded structural view of the backplane connector plug shown;

[0021] Figure 3 For Figure 1 Schematic perspective view of the communication module in the backplane connector plug shown;

[0022] Figure 4 For Figure 3 Schematic perspective view of the communication module shown from another perspective;

[0023] Figure 5 For Figure 3 Exploded structural view of the communication module shown;

[0024] Figure 6 For Figure 3 Exploded structural view of one part of the communication module shown;

[0025] Figure 7 For Figure 3 Exploded structural view of another part of the communication module shown;

[0026] Figure 8 ForFigure 3 Schematic diagram of the planar structure of the edge shielding sheet in the communication module shown Specific implementation manners

[0027] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present invention can be understood more thoroughly and comprehensively.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "inner", "outer", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0029] Refer to Figure 1 and Figure 2 As shown in, a backplane connector plug 10 provided by an embodiment of the present invention includes a housing 20 and a communication module 30. The housing 20 can be made of an insulating material. A plurality of mounting grooves 21 are formed on the housing 20. The number of communication modules 30 is multiple. The communication modules 30 and the mounting grooves 21 form a one-to-one correspondence. The communication modules 30 are received in the mounting grooves 21, that is, each mounting groove 21 receives one communication module 30. One side of the backplane connector plug 10 is electrically connected to a circuit board, and the other side of the backplane connector plug 10 is used to cooperate with a socket to achieve an electrical connection relationship. The signal lines inside the backplane connector plug 10 and the signal lines inside the socket are electrically connected to each other, so as to realize the cooperation between the socket and the backplane connector plug 10.

[0030] Refer to Figure 3 、 Figure 4 and Figure 5, the communication module 30 includes a signal group 31, an insulating carrier 32, and a shielding unit 33. The shielding unit 33 is disposed on the insulating carrier 32, and the shielding unit 33 can be detachably connected to the insulating carrier 32. For example, the shielding unit 33 can be fixed on the insulating carrier 32 by means of snap connection and screw connection. The insulating carrier 32 is made of an insulating material. There are multiple signal groups 31, and each signal group 31 includes two differential signal lines 31a. The signal polarities of the two differential signal lines 31a are opposite. Therefore, through this signal group 31, the signal transmission speed can be greatly improved. In view of the fact that each signal group 31 includes two differential signal lines 31a with opposite signal polarities, the shielding unit 33 can be set to shield the signals transmitted by two adjacent signal groups 31, preventing the signals transmitted by one signal group 31 from interfering with the signals transmitted by the other signal group 31.

[0031] In some embodiments, the shielding unit 33 includes an edge shielding sheet 100 and a middle shielding sheet 200. The number of edge shielding sheets 100 is two, and the number of middle shielding sheets 200 is one. The two edge shielding sheets 100 are arranged at intervals, and the middle shielding sheet 200 is clamped between the two edge shielding sheets 100. Each of the two edge shielding sheets 100 includes an edge substrate 110, an edge contact 120, and an edge joint 130. For the convenience of description, the two edge shielding sheets 100 are respectively denoted as the first edge shielding sheet 101 and the second edge shielding sheet 102. The edge substrate 110, the edge contact 120, and the edge joint 130 of the first edge shielding sheet 101 are respectively denoted as the first edge substrate 111, the first edge contact 121, and the first edge joint 131; the edge substrate 110, the edge contact 120, and the edge joint 130 of the second edge shielding sheet 102 are respectively denoted as the second edge substrate 112, the second edge contact 122, and the second edge joint 132.

[0032] The first edge substrate 111 can be generally in the shape of a rectangular sheet structure. Therefore, the first edge substrate 111 has two relatively arranged long edges. Obviously, the long edge extends along the length direction of the first edge substrate 111. The number of the first edge contacts 121 is multiple, and the multiple first edge contacts 121 are arranged at intervals on one of the long edges. The number of the first edge joints 131 is multiple, and the multiple first edge joints 131 are arranged at intervals on the other long edge. The number of the first edge contacts 121 on the same first edge substrate 111 is equal to the number of the first edge joints 131. The first edge contacts 121 are used for electrical connection with the socket, and the first edge joints 131 are used for electrical connection with the circuit board. A through hole 140 is also formed on the first edge substrate 111, and the through hole 140 penetrates the entire first edge substrate 111 along the thickness direction.

[0033] Refer to 5, Figure 7 and Figure 8, the first edge shielding sheet 101 can be divided into multiple shielding columns 300. The multiple shielding columns 300 extend along the width direction of the first edge substrate 111, such that the multiple shielding columns 300 are arranged at intervals along the length direction of the first edge substrate 111. For the same shielding column 300, the number of the first edge contacts 121 and the first edge joints 131 is one respectively, and the number of the through holes 140 can be one or multiple. Along the extending direction of the shielding column 300, the through holes 140 on the same shielding column 300 are located between the first edge contacts 121 and the first edge joints 131. The cross-sectional profile of the through hole 140 can be circular, elliptical or regular polygon, etc. For example, the caliber of each through hole 140 can be equal; or, the caliber of the through holes 140 can be unequal, such that the caliber of a part of the through holes 140 is relatively large, while the caliber of another part of the through holes 140 is relatively small. The first edge shielding sheet 101 can be integrally formed by stamping or stretching, or can be integrally formed by injection molding, that is, the first edge substrate 111, the first edge contacts 121 and the first edge joints 131 are simultaneously formed and connected into a whole first edge shielding sheet 101.

[0034] Refer to Figure 6 , Figure 7 and Figure 8 , the first edge shielding sheet 101 further includes a shielding ring 150. The shielding ring 150 can be integrally formed and connected into a whole with the first edge substrate 111 by stamping or stretching. The shielding ring 150 can also be fixed on the first edge substrate 111 by welding or other means. The welding method can be brazing or fusion welding, and the fusion welding can be laser welding or ultrasonic welding, etc. The shielding ring 150 is generally in a cylindrical structure with openings at both ends. The shielding ring 150 is arranged on the surface of the first edge substrate 111 facing the second edge substrate 112, that is, one end of the shielding ring 150 is a fixed end, so the fixed end is fixedly connected with the first edge substrate 111; the other end of the shielding ring 150 is a free end, and the free end protrudes a certain height relative to the first edge substrate 111 along the thickness direction of the first edge substrate 111. A blind hole can be formed by recessing a certain depth on the surface of the insulating carrier 32 facing the first edge substrate 111, such that the shielding ring 150 is received in the blind hole. After the first edge shielding sheet 101 and the insulating carrier 32 are assembled, the shielding ring 150 will be hidden in the blind hole. The blind hole plays a role of receiving, limiting and protecting the shielding sheet 33.

[0035] The number of shielding rings 150 is equal to the number of through holes 140, that is, a one-to-one correspondence is formed between the shielding rings 150 and the through holes 140. The shielding rings 150 are connected to the peripheries of the through holes 140, so that the shielding rings 150 are arranged around the through holes 140. The cross-sectional profile of the shielding ring 150 can be the same as that of the through hole 140, that is, the cross-sectional profile of the shielding ring 150 can also be circular, elliptical or regular polygon, etc. Along the direction from the fixed end to the free end of the shielding ring 150, the diameter of the shielding ring 150 can always remain constant. At this time, the shielding ring 150 can be understood as a cylindrical shielding ring 150. Along the direction from the fixed end to the free end of the shielding ring 150, the diameter of the shielding ring 150 can gradually increase or gradually decrease. At this time, the shielding ring 150 can be understood as a conical shielding ring 150.

[0036] The shielding ring 150 includes side plates 151. The number of side plates 151 can be two, and the two side plates 151 can be arranged at intervals along the interval direction of adjacent shielding columns 300. A plurality of through holes 152 are formed in each side plate 151. The through holes 152 penetrate the entire side plate 151 in the thickness direction, so that the through holes 152 communicate the interval space between the two shielding columns 300 and the through holes 140. The through holes 152 can be arranged in a matrix on the side plate 151.

[0037] Refer to Figure 3 、 Figure 4 and Figure 5 As shown in FIGS. 5,

[0038] Refer to 5, Figure 7 and Figure 8, the second edge shielding sheet 102 can be divided into multiple shielding columns 300 that extend along the width direction of the second edge substrate 112, such that the multiple shielding columns 300 are arranged at intervals along the length direction of the second edge substrate 112. For the same shielding column 300, the number of the second edge contacts 122 and the second edge joints 132 is one respectively, and the number of the through holes 140 can be one or multiple. Along the extending direction of the shielding column 300, the through holes 140 on the same shielding column 300 are located between the second edge contacts 122 and the second edge joints 132. The cross-sectional profile of the through hole 140 can be circular, elliptical or regular polygon, etc. For example, the caliber of each through hole 140 can be equal; or, the caliber of the through holes 140 can be unequal, such that the caliber of some of the through holes 140 is relatively large, while the caliber of some other through holes 140 is relatively small. The second edge shielding sheet 102 can be integrally formed by stamping or stretching, or can be integrally formed by injection molding, that is, the second edge substrate 112, the second edge contacts 122 and the second edge joints 132 are simultaneously formed and connected into a whole second edge shielding sheet 102.

[0039] Refer to Figure 6 , Figure 7 and Figure 8 , the second edge shielding sheet 102 further includes a shielding ring 150, and the shielding ring 150 can be integrally formed and connected into a whole with the second edge substrate 112 by stamping or stretching. The shielding ring 150 can also be fixed on the second edge substrate 112 by welding or other means, and the welding method can be brazing or fusion welding, and the fusion welding can be laser welding or ultrasonic welding, etc. The shielding ring 150 is generally in a cylindrical structure with openings at both ends, and the shielding ring 150 is disposed on the surface of the second edge substrate 112 facing away from the first edge substrate 111, that is, one end of the shielding ring 150 is a fixed end, so the fixed end is fixedly connected with the second edge substrate 112; the other end of the shielding ring 150 is a free end, and the free end protrudes a certain height relative to the second edge substrate 112 along the thickness direction of the second edge substrate 112. A blind hole can be recessed to a certain depth on the surface of the insulating carrier 32 facing the second edge substrate 112, such that the shielding ring 150 is received in the blind hole. After the second edge shielding sheet 102 and the insulating carrier 32 are assembled, the shielding ring 150 will be hidden in the blind hole. The blind hole plays a role of receiving, limiting and protecting the shielding sheet 33.

[0040] The number of shielding rings 150 is equal to the number of through holes 140, that is, the shielding rings 150 and the through holes 140 form a one-to-one correspondence. The shielding rings 150 are connected to the peripheries of the through holes 140, so that the shielding rings 150 are arranged around the through holes 140. The cross-sectional profile of the shielding ring 150 can be the same as that of the through hole 140, that is, the cross-sectional profile of the shielding ring 150 can also be circular, elliptical or regular polygon, etc. Along the direction from the fixed end to the free end of the shielding ring 150, the diameter of the shielding ring 150 can always remain constant. At this time, the shielding ring 150 can be understood as a cylindrical shielding ring 150. Along the direction from the fixed end to the free end of the shielding ring 150, the diameter of the shielding ring 150 can gradually increase or gradually decrease. At this time, the shielding ring 150 can be understood as a conical shielding ring 150.

[0041] The shielding ring 150 includes side plates 151. The number of side plates 151 can be two, and the two side plates 151 can be arranged at intervals along the interval direction of adjacent shielding columns 300. A plurality of through holes 152 are formed in each side plate 151. The through holes 152 penetrate the entire side plate 151 in the thickness direction, so that the through holes 152 communicate the interval space between the two shielding columns 300 and the through hole 140. The through holes 152 can be arranged in a matrix on the side plate 151.

[0042] Refer to Figure 3 、 Figure 4 and Figure 5 In some embodiments, the intermediate shielding sheet 200 includes an intermediate substrate 210, an intermediate partition 220 and an intermediate contact 230. The intermediate substrate 210 includes an intermediate bearing section 211 and end bearing sections 212. The number of intermediate bearing sections 211 is one, and the number of end bearing sections 212 is two. The intermediate bearing section 211 extends along the interval direction of the edge contacts 120 on the same edge shielding sheet 100, that is, along the length direction of the edge shielding sheet 100. The end bearing sections 212 are bent and connected to the two ends in the length direction of the intermediate bearing section 211, that is, one end bearing section 212 is bent and connected to one end in the length direction of the intermediate bearing section 211, and the other end bearing section 212 is bent and connected to the other end in the length direction of the intermediate bearing section 211. The end bearing sections 212 can extend along the width direction of the edge shielding sheet 100, so that the bending angle between the end bearing sections 212 and the intermediate bearing section 211 is 90°, that is, the end bearing sections 212 are perpendicularly connected to the intermediate bearing section 211.

[0043] The middle bearing section 211 can be generally in a rectangular plate-like structure. The middle bearing section 211 has two long edges extending along the length direction. A plurality of middle contacts 230 are provided on one of the long edges. The middle contacts 230 are arranged at intervals along the length direction of the middle bearing section 211. The number of the middle contacts 230 is equal to the number of the first edge contacts 121 on the first edge shield 101, that is, the middle contacts 230 and the first edge contacts 121 form a one-to-one correspondence, so that the middle contacts 230 are in contact with the first edge contacts 121 on the first edge shield 101. A plurality of middle contacts 230 are also provided on the other long edge. The middle contacts 230 are arranged at intervals along the length direction of the middle bearing section 211. The number of the middle contacts 230 is equal to the number of the second edge contacts 122 on the second edge shield 102, that is, the middle contacts 230 and the second edge contacts 122 form a one-to-one correspondence, so that the middle contacts 230 are in contact with the second edge contacts 122 on the second edge shield 102.

[0044] During the assembly process, the middle shield 200 is placed between the first edge contact 121 and the second edge contact 122, so that the middle contacts 230 on one edge of the middle shield 200 are abutted against the first edge contact 121, and the middle contacts 230 on the other edge are abutted against the second edge contact 122. Of course, the middle contacts 230 will be located between the first edge contact 121 and the second edge contact 122, so that the first edge contact 121 and the second edge contact 122 form a clamping effect on the middle contacts 230 and the entire middle shield 200. Therefore, in view of the fact that the middle shield 200 is placed in the space between the first edge contact 121 and the second edge contact 122, the middle shield 200 will not occupy the installation space outside the first edge contact 121 and the second edge contact 122, so that the volume of the shielding unit 33 can be reasonably reduced. At the same time, the first edge contact 121 and the second edge contact 122 apply a clamping force to the middle shield 200, so that there is sufficient abutting force between the middle contacts 230 and the first edge contact 121 and the second edge contact 122, ensuring the stability and reliability of the middle contacts 230 in terms of physical connection and electrical connection.

[0045] During the installation of the entire communication module 30, since a shielding ring 150 is provided on the surface of the first edge substrate 111 facing the second edge substrate 112, an insulating carrier 32 is connected to this surface, such that the shielding ring 150 on this surface is inserted onto the insulating carrier 32. Obviously, the insulating carrier 32 is located within the spaced-apart space between the first edge substrate 111 and the second edge substrate 112. Since a shielding ring 150 is provided on the surface of the second edge substrate 112 facing away from the first edge substrate 111, another insulating carrier 32 is connected to this surface, such that the shielding ring 150 on this surface is inserted onto the insulating carrier 32. Obviously, the insulating carrier 32 is located outside the spaced-apart space between the first edge substrate 111 and the second edge substrate 112. Therefore, for the same communication module 30, one insulating carrier 32 is located within the spaced-apart space between the first edge substrate 111 and the second edge substrate 112, while the other insulating carrier 32 is located outside the spaced-apart space between the first edge substrate 111 and the second edge substrate 112.

[0046] The signal group 31 can be provided on the insulating carrier 32. When the insulating carrier 32 is installed on the edge shielding sheet 100, there is a signal group 31 between two adjacent shielding columns 300 on the same edge shielding sheet 100, such that the signal group 31 is located within the spaced-apart space between the two adjacent shielding columns 300. The signal group 31 does not contact the shielding column 300 and maintains a certain distance. Since the shielding ring 150 protrudes a certain height relative to the edge substrate 110, the shielding ring 150 will shield and isolate each signal group 31 to reduce the mutual crosstalk of signals between adjacent signal groups 31, thereby helping to improve the stability, reliability, and anti-interference ability of the communication module 30 and the backplane connector plug 10 during data transmission. At the same time, the edge contact 120 can also reduce the mutual crosstalk of signals between adjacent signal groups 31 corresponding to the same edge shielding sheet 100, and the edge connector 130 can also reduce the mutual crosstalk of signals between adjacent signal groups 31 corresponding to the same edge shielding sheet 100, thus further improving the stability, reliability, and anti-interference ability of the communication module 30 and the backplane connector plug 10 during data transmission. Therefore, the shielding column 300 can reduce signal interference, thereby improving the shielding effect of the shielding unit 33.

[0047] Since each signal has a return current, and the edge substrate 110 serves as part of the return path for the return current. Given that vias 140 are provided on the edge substrate 110, it is equivalent to increasing the nodes of the return network, that is, increasing the return paths for the return current. The portions of the edge substrate 110 without vias 140 are interconnected, enabling the return current to switch different return paths on the edge substrate 110, which can reduce the radiation effect of the electric field, thereby reducing crosstalk between signals and alleviating the impact caused by impedance mutation. The inductive mutation suffered by the signal is reduced, thereby improving signal transmission, reducing the fluctuation of insertion loss, and improving resonance. At the same time, the provision of the vias 140 can reasonably reduce the weight of the edge substrate 110, thus achieving a lightweight design for the communication module 30 and the backplane connector plug 10. Of course, the provision of the vias 140 can serve as a heat transfer channel for the heat generated by the communication module 30 and the backplane connector plug 10, so that the heat generated by the communication module 30 and the backplane connector plug 10 can quickly be discharged to the outside through the vias 140, thereby improving the heat dissipation effect of the communication module 30 and the backplane connector plug 10 to a certain extent and avoiding the influence on the service life of the communication module 30 and the backplane connector plug 10 due to poor heat dissipation.

[0048] Given that the shielding ring 150 is in a closed-loop shape, the shielding ring 150 is completely arranged around the via 140. In this way, the radiation effect of the electric field can be effectively avoided, preventing the signals on one communication module 30 from interfering with the signals on other communication modules 30 through the via 140, thereby improving the shielding effect and anti-interference ability of the shielding unit 33, and ultimately improving the signal transmission effect of the communication module 30 and the backplane connector plug 10. Of course, it can also prevent the signals generated by different signal groups 31 on the same communication module 30 from interfering with each other through the via 140.

[0049] Since the side plate 151 of the shielding ring 150 is provided with a through hole 152, on the one hand, the weight of the shielding ring 150 can be reasonably reduced, thereby realizing the lightweight design of the communication module 30 and the backplane connector plug 10. On the other hand, the heat in the interval space between two adjacent shielding columns 300 can flow into the through hole 140 through the through hole 152 to be discharged to the outside, thereby improving the heat dissipation effect of the communication module 30 and the backplane connector plug 10 and avoiding affecting the service life of the communication module 30 and the backplane connector plug 10 due to poor heat dissipation. On the yet another hand, the caliber of the through hole 152 is reasonable, which can prevent the signals on the signal group 31 from entering the through hole 140 through the through hole 152, thereby avoiding the interference of the signals generated by different signal groups 31 on the same communication module 30 and also avoiding the interference of the signals generated by the signal groups 31 on different communication modules 30, and improving the shielding effect of the shielding unit 33. The thickness of the shielding ring 150 is less than or equal to the thickness of the edge substrate 110, so that the weight of the shielding ring 150 can be reasonably reduced on the basis of shielding signals.

[0050] Since the middle contact 230 of the middle shielding sheet 200 abuts between the first edge contact 121 and the second edge contact 122, the return current realizes electrical interconnection through the middle shielding sheet 200, ensuring the common ground interconnection of the signal loop in the contact area between the backplane connector plug 10 and the socket, improving the return effect, and being beneficial to improving the signal transmission speed of the communication module 30 to avoid the signal interference phenomenon between the signal groups 31.

[0051] In some embodiments, the intermediate partition 220 is connected to the intermediate substrate 210, and the two can form a detachable connection relationship. For example, the intermediate partition 220 can be fixed only on the intermediate bearing section 211, or the intermediate partition 220 can be fixed only on the end bearing section 212, or the intermediate partition 220 can be fixed on both the intermediate bearing section 211 and the end bearing section 212 at the same time. Given that the intermediate contacts 230 are provided on both long edges of the intermediate bearing section 211, there are two sets of intermediate contacts 230 on the intermediate shielding sheet 200, and the intermediate partition 220 is located between the two sets of intermediate contacts 230. The distances from the two sets of intermediate contacts 230 to the intermediate partition 220 can be equal, which can also be understood as the intermediate bearing section 211 being symmetrically arranged relative to the intermediate partition 220. By providing the intermediate partition 220, after the intermediate shielding sheet 200 is assembled, the first edge contact 121 and the second edge contact 122 will be located on opposite sides of the intermediate partition 220, that is, the intermediate partition 220 is located between the first edge contact 121 and the second edge contact 122. In this way, through the partitioning effect of the intermediate partition 220, signal crosstalk between the signal group 31 corresponding to the first edge shielding sheet 101 and the signal group 31 corresponding to the second edge shielding sheet 102 can be effectively prevented, thereby further improving the shielding effect of the shielding unit 33 on the signal. At the same time, the intermediate partition 220 also plays a role in further improving the reflux effect, which is beneficial to improving the signal transmission speed of the communication module 30.

[0052] Taking the extension direction of the edge contact 120 as the reference direction, this reference direction is actually the width direction of the edge substrate 110. The extension length of the edge contact 120 is less than or equal to the extension length of the intermediate partition 220 in the reference direction, so that the orthographic projection of the edge contact 120 on the intermediate shielding sheet 200 will all fall on the intermediate partition 220. At the same time, along the thickness direction of the edge substrate 110, the intermediate partition 220 can completely cover the edge contact 120. Therefore, the signal crosstalk between the signal group 31 corresponding to the first edge shielding sheet 101 and the signal group 31 corresponding to the second edge shielding sheet 102 will be weakened or even completely eliminated by the intermediate partition 220, and the shielding function of the shielding unit 33 on the signal is further enhanced.

[0053] A through hole 221 penetrating the intermediate partition 220 in the thickness direction is provided on the intermediate partition 220. By providing this through hole 221, on the one hand, the weight of the intermediate shielding sheet 200 can be reasonably reduced, and on the other hand, the diversion function can be realized, enhancing the fluidity of heat in the gap between the first edge shielding sheet 101 and the second edge shielding sheet 102, preventing heat from accumulating in the gap between the first edge shielding sheet 101 and the second edge shielding sheet 102 for a long time, and improving the heat dissipation effect of the communication module 30.

[0054] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0055] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A shielding unit, characterized in that, it includes: Edge shielding sheets, the number of the edge shielding sheets is two, the two edge shielding sheets are arranged at intervals, each edge shielding sheet includes an edge substrate, edge contacts and edge joints, the edge contacts are arranged at intervals on one edge of the edge substrate, the edge joints are arranged at intervals on the other edge of the edge substrate, through holes are formed on the edge substrate, the edge shielding sheet is divided into a plurality of shielding columns arranged at intervals, and the edge contacts, the edge joints and the through holes form the shielding columns; and A middle shielding sheet, including a middle substrate, middle partitions and middle contacts, middle contacts that abut against the edge contacts are arranged on two opposite edges of the middle substrate, and the middle partitions are connected to the middle substrate and are located between the edge contacts of the two edge shielding sheets; Taking the extending direction of the edge contacts as the reference direction, the extending length of the edge contacts is less than or equal to the extending length of the middle partitions in the reference direction; The edge shielding sheet further includes shielding rings, the shielding rings correspond to the through holes one by one, and the shielding rings protrude and are fixed on the edge substrate and surround the through holes.

2. The shielding unit according to claim 1, characterized in that, The cross-sectional profile of the shielding ring is the same as the cross-sectional profile of the through hole.

3. The shielding unit according to claim 1, characterized in that, The middle contacts are clamped between the edge contacts of the two edge shielding sheets.

4. The shielding unit according to claim 1, characterized in that, Through holes penetrating the middle partitions in the thickness direction are formed on the middle partitions.

5. The shielding unit according to claim 1, characterized in that, The middle substrate includes a middle bearing section and two end bearing sections, the two end bearing sections are bent and connected to opposite ends of the middle bearing section, the middle bearing section extends along the interval direction of the edge contacts on the same edge shielding sheet, and the middle partitions are connected to the middle bearing section and / or the end bearing sections.

6. The shielding unit according to claim 1, characterized in that, The middle partitions are detachably connected to the middle substrate.

7. The shielding unit according to claim 1, characterized in that, The cross-sectional profile of the shielding ring is circular, oval or regular polygon.

8. The shielding unit according to claim 1, characterized in that, The shielding ring has side plates that define the interval space between adjacent two shielding columns, through holes penetrating the side plates in the thickness direction are formed on the side plates, the number of the through holes is multiple, and the multiple through holes are arranged in a matrix.

9. A communication module, characterized in that, Comprising a signal group, an insulating carrier, and the shielding unit according to any one of claims 1 to 8, the two edge shielding sheets are denoted as a first edge shielding sheet and a second edge shielding sheet, the insulating carrier is disposed on the surface of the first edge shielding sheet facing the second edge shielding sheet, the insulating carrier is disposed on the surface of the second edge shielding sheet facing away from the first edge shielding sheet, the signal group is connected to the insulating carrier and is located between two adjacent shielding columns of the same edge shielding sheet, and the signal group includes two differential signal lines with opposite signal polarities.

10. A backplane connector socket, characterized in that it comprises a housing and a plurality of communication modules according to claim 9, a plurality of mounting grooves are formed in the housing, the mounting grooves correspond to the communication modules one by one, and the communication modules are matched with the mounting grooves.

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