A shield net and backplane connector

Abstract

The utility model provides a kind of shielding net and backboard connector, belong to connecting device field.The backboard connector includes insulating shell and shielding net, shielding net includes two kinds of ground sheet of vertical and horizontal intersection arrangement, the space surrounded by ground sheet is the shielding cavity for providing shielding to signal terminal pair, ground sheet is inserted on insulating shell from the one end of insulating shell for corresponding with printed board, the part of insulating shell in shielding cavity is the mounting portion for installing signal terminal pair, and it is provided with connecting material between mounting portion and other part of insulating shell, at least one ground sheet is provided with the avoidance slot capable of avoiding connecting material at its one end for with adapter connector plug, the groove bottom of avoidance slot can be stopped with connecting material in the direction of insertion fit.The shielding net is the shielding net in the above-mentioned backboard connector.In the utility model, shielding net is mounted on the insulating shell of backboard connector by the mode of assembly, reduces the forming difficulty of insulating shell, also convenient for later assembly operation.

Description

Technical Field

[0001] This utility model belongs to the field of connection devices, and in particular relates to a shielding mesh and backplate connector. Background Technology

[0002] As the signal transmission rate of backplane connectors increases, signal crosstalk in backplane connectors has a greater impact on normal signal transmission. Backplane connectors generally need to be equipped with a grounded shielding structure to achieve electromagnetic shielding and improve crosstalk.

[0003] The shielding structure in conventional backplane connectors is difficult to achieve comprehensive four-sided shielding, resulting in severe crosstalk. To solve this technical problem, Chinese invention patent application CN113131239A discloses an electrical connector, which belongs to the category of backplane connectors. This electrical connector includes an insulating shell, multiple signal terminals fixed on the insulating shell, multiple first grounding plates and multiple second grounding plates that shield the signal terminals. The first grounding plates and second grounding plates are arranged intersectingly to form several mutually spaced shielding cavities. The signal terminals are distributed in the corresponding shielding cavities. The first grounding plates are integrally formed on the insulating shell, and the second grounding plates are assembled on the insulating shell.

[0004] The first and second grounding plates form a shielding mesh, and each grid of the shielding mesh is the aforementioned shielding cavity. This shielding mesh enables the signal terminals to obtain more comprehensive shielding around them, improving crosstalk.

[0005] In the aforementioned backplane connector, because the insulating shell needs to be retained within each grid of the shielding mesh, the first grounding piece needs to be integrally embedded in the insulating shell during the injection molding process. This requires the first grounding piece to be pre-clamped in the mold for the insulating shell injection, increasing the difficulty and cost of molding the insulating shell. Furthermore, since the first grounding piece is integrally molded in the insulating shell, its position is completely fixed. If there is a slight deviation in the position of the first grounding piece when it is molded into the insulating shell, the second grounding piece cannot be assembled, rendering the insulating shell unusable. Utility Model Content

[0006] The purpose of this utility model is to provide a backplate connector to solve the technical problems of high molding difficulty and high molding cost of insulating shell and poor production tolerance of connector in the prior art. Another objective of this invention is to provide a shielding mesh to solve the aforementioned technical problems.

[0007] To achieve the above objectives, the technical solution for the backplane connector provided by this utility model is as follows: A backplane connector includes an insulating shell and a shielding mesh disposed on the insulating shell. The shielding mesh includes two types of grounding plates arranged in a crisscross pattern. The space enclosed by the grounding plates is a shielding cavity for providing shielding for signal terminal pairs. The grounding plates are inserted into the insulating shell from one end of the insulating shell corresponding to a printed circuit board. The portion of the insulating shell located within the shielding cavity is a mounting portion for mounting the signal terminal pairs. A connecting piece is provided between the mounting portion and other portions of the insulating shell. At least one grounding plate has a clearance groove at its end for insertion with an adapter connector, which can avoid the connecting piece. The bottom of the clearance groove can stop the connecting piece in the insertion direction. The clearance groove is located at the intersection of the grounding plate and another grounding plate.

[0008] As a further improvement, the insulating shell includes a frame and mounting portions arranged in a matrix within the frame. The mounting portions are provided with connecting materials at least between the mounting portions laterally adjacent to them and between the laterally adjacent frames. Grounding plates are provided between adjacent mounting portions and between the mounting portions and the frame.

[0009] As a further improvement, the insulating shell includes a frame and mounting portions arranged in a matrix within the frame. The frame also has a partition beam integrally connected to the frame and separating the mounting portions that are adjacent in the horizontal and / or vertical directions. The mounting portions are connected to the frame and the partition beam in the horizontal and / or vertical directions. A grounding plate is disposed between the mounting portion and the partition beam and between the mounting portion and the frame. The clearance groove on the grounding plate perpendicular to the partition beam can also be used to avoid the partition beam.

[0010] As a further improvement, both types of grounding plates are provided with clearance grooves. The part of the grounding plate corresponding to the bottom of the clearance groove constitutes a connecting part for connecting the parts of the grounding plate on both sides of the clearance groove. One type of grounding plate is provided with a clearance groove at the end corresponding to the printed circuit board to avoid the connecting part on the other type of grounding plate. The ends of the two types of grounding plates corresponding to the printed circuit board are on the same plane. One type of grounding plate is provided with a plug notch for inserting the other type of grounding plate.

[0011] As a further improvement, the insertion notch is only provided on the grounding plate with the clearance groove.

[0012] As a further improvement, the plug notch has a narrow opening structure with a narrower opening, and the grounding piece used to plug into the plug notch fits tightly with the narrower opening of the plug notch.

[0013] As a further improvement, at least one grounding piece is provided with a positioning protrusion protruding in the thickness direction, and the insulating shell is provided with a positioning groove for the positioning protrusion to be inserted. The positioning protrusion and the end wall of the positioning groove are engaged to stop and cooperate during the insertion process to achieve insertion positioning.

[0014] The beneficial effects are as follows: This backplane connector is an improvement over existing technology. The shielding mesh in this backplane connector consists of two types of grounding plates, both of which can be assembled onto the insulating shell. This eliminates the need for the insulating shell and grounding plates to be integrally molded, reducing the molding difficulty of the insulating shell. Furthermore, the installation position of the grounding plates can be finely adjusted at any time during assembly, facilitating the assembly operation. The clearance grooves on the grounding plates avoid the connecting material between the mounting part and other parts of the insulating shell during assembly, achieving the purpose of assembling the grounding plates onto the insulating shell. The clearance grooves are located at the intersection of the grounding plates, a position not directly opposite the side of the signal terminals, thus having a minimal impact on the shielding effect of the signal terminals and ensuring a low level of crosstalk.

[0015] To achieve the above objectives, the technical solution for the shielding mesh provided by this utility model is as follows: A shielding mesh includes two types of grounding plates arranged in a crisscross pattern. The space enclosed by the grounding plates is a shielding cavity for providing shielding for signal terminal pairs. At least one grounding plate has a clearance groove at its end for insertion with an adapter connector, which can avoid the connecting material on the insulating shell of the backplane connector. The bottom of the clearance groove can stop the connecting material in the insertion direction. The clearance groove is located at the intersection of the grounding plate and the other grounding plate.

[0016] As a further improvement, both types of grounding plates are provided with clearance grooves. The part of the grounding plate corresponding to the bottom of the clearance groove constitutes a connecting part for connecting the parts of the grounding plate on both sides of the clearance groove. One type of grounding plate is provided with a clearance groove at the end corresponding to the printed circuit board to avoid the connecting part on the other type of grounding plate. The ends of the two types of grounding plates corresponding to the printed circuit board are on the same plane. One type of grounding plate is provided with a plug notch for inserting the other type of grounding plate.

[0017] As a further improvement, the insertion notch is only provided on the grounding plate with the clearance groove.

[0018] As a further improvement, the plug notch has a narrow opening structure with a narrower opening, and the grounding piece used to plug into the plug notch fits tightly with the narrower opening of the plug notch.

[0019] As a further improvement, at least one grounding piece is provided with a positioning protrusion protruding in the thickness direction, the positioning protrusion being used to stop and cooperate with the end wall of the positioning groove during the insertion process to achieve insertion positioning.

[0020] The beneficial effects are as follows: This shielding mesh is an improvement upon existing technology. It consists of two types of grounding plates, both of which can be assembled onto the insulating shell, eliminating the need for a monolithic molding of the insulating shell and grounding plates. This reduces the difficulty of molding the insulating shell. Furthermore, the installation position of the grounding plates can be fine-tuned at any time during assembly, facilitating the assembly process. The clearance grooves on the grounding plates prevent the connecting material between the mounting portion of the insulating shell and other parts during assembly, achieving the purpose of assembling the grounding plates onto the insulating shell. The clearance grooves are located at the intersection of the grounding plates, a position not directly opposite the side of the signal terminals, thus minimizing the impact on the shielding effect of the signal terminals and ensuring a low level of crosstalk. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of Embodiment 1 of the backplate connector in this utility model; Figure 2 This is a partial structural schematic diagram of Embodiment 1 of the backplate connector in this utility model; Figure 3 This is a schematic diagram of the insulating shell structure in Embodiment 1 of the backplate connector of this utility model; Figure 4 This is a schematic diagram of the transverse grounding piece in Embodiment 1 of the backplate connector of this utility model; Figure 5 This is a schematic diagram of the longitudinal grounding piece in Embodiment 1 of the backplate connector of this utility model; Figure 6 This is a schematic diagram of the structure of the horizontal grounding plate and the vertical grounding plate being inserted in Embodiment 1 of the backplate connector of this utility model.

[0022] Explanation of reference numerals in the attached figures: 1. Insulating shell; 11. Frame; 12. Separating beam; 13. Mounting part; 14. Connecting material; 15. Positioning groove; 2. Horizontal grounding plate; 21. Horizontal clearance groove; 22. Horizontal shielding part; 23. Horizontal connecting part; 3. Longitudinal grounding plate; 31. Longitudinal clearance groove; 32. Longitudinal shielding part; 33. Longitudinal connecting part; 34. Clearance groove; 35. Insertion notch; 4. Positioning protrusion; 5. Mounting protrusion; 6. Grounding fisheye; 7. Signal terminal. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments.

[0024] Specific embodiment 1 of the backplane connector provided by this utility model: See appendix Figure 1The backplane connector includes an insulating shell 1, signal terminals 7 disposed on the insulating shell 1, and a shielding mesh. The signal terminals 7 are arranged in pairs for transmitting differential signals. The shielding mesh includes two grounding plates arranged in different directions and has a shielding cavity for accommodating the pairs of signal terminals 7 and providing shielding for the pairs of signal terminals 7 inside.

[0025] In this embodiment, the direction in which the backplane connector and the adapter connector are inserted is considered the front-to-back direction. The front end of the backplane connector is used to mate with the adapter connector, and the rear end of the backplane connector is used to press against the printed circuit board. Specifically, this is achieved by pressing against the printed circuit board through the signal fisheye on the signal terminal 7 and the grounding fisheye 6 on the grounding plate. In this embodiment, the direction in which the two signal terminals 7 in the same pair are arranged is considered the transverse direction, and the direction perpendicular to both the transverse and front-to-back directions is considered the longitudinal direction. Each pair of signal terminals 7 is arranged in an array in both the transverse and longitudinal directions.

[0026] See appendix Figure 2 and attached Figure 3 The insulating shell 1 includes a frame 11 and mounting portions 13 arranged in a matrix within the frame 11. Each mounting portion 13 is fitted with a pair of signal terminals 7. The frame 11 is also provided with a partition beam 12 integrally connected to the frame 11 and separating the horizontally adjacent mounting portions 13. The mounting portions 13 are connected to the frame 11 and the partition beam 12 in the horizontal direction by connecting materials 14. There are no connecting materials 14 between the mounting portions 13 and the mounting portions 13 adjacent to them in the longitudinal direction, nor between the mounting portions 13 and the frame 11.

[0027] Two types of grounding plates extend laterally and longitudinally, respectively. The grounding plate extending laterally is called the transverse grounding plate 2, and the grounding plate extending longitudinally is called the longitudinal grounding plate 3. The longitudinal grounding plate 3 is disposed between the mounting part 13 and the partition beam 12 adjacent to it laterally, and between the frame 11. The transverse grounding plate 2 is disposed between the mounting part 13 and the mounting part 13 adjacent to it longitudinally, and between the frame 11.

[0028] See appendix Figure 4 and attached Figure 5 Both the horizontal grounding plate 2 and the vertical grounding plate 3 have clearance grooves at their front ends. The portions of the grounding plates located on both sides of the clearance grooves, separated by the clearance grooves, are shielding portions. The portions located at the bottom of the clearance grooves, used to connect adjacent shielding portions, are connecting portions. The horizontal grounding plate 2 is provided with a horizontal clearance groove 21, a horizontal shielding portion 22, and a horizontal connecting portion 23. The vertical grounding plate 3 is provided with a vertical clearance groove 31, a vertical shielding portion 32, and a vertical connecting portion 33. The horizontal clearance groove 21 is located at the intersection of the horizontal grounding plate 2 and the vertical grounding plate 3, and the vertical clearance groove 31 is located at the intersection of the vertical grounding plate 3 and the horizontal grounding plate 2. Both the horizontal grounding plate 2 and the vertical grounding plate 3 have grounding fisheyes 6 at their rear ends.

[0029] The transverse grounding plate 2 is mainly used to avoid the aforementioned dividing beam 12, and the longitudinal avoidance groove 31 is mainly used to avoid the aforementioned connecting material 14.

[0030] Both the longitudinal grounding piece 3 and the transverse grounding piece 2 can be inserted into the insulating shell 1 from back to front. After insertion, the bottom of the longitudinal clearance groove 31 engages with the connecting piece 14 to stop and position the longitudinal grounding piece 3. During the process of pressing the backplane connector onto the printed circuit board, the force on the grounding piece can also be transmitted to the insulating shell 1 through the aforementioned stop and engagement structure.

[0031] Compared to existing technologies, the grounding plate in this backplane connector does not need to be pre-molded on the insulating shell 1, which reduces the processing difficulty and cost of the insulating shell 1. Furthermore, during the assembly process, the positions of both grounding plates can be finely adjusted at any time according to assembly needs, effectively improving the assembly fault tolerance of the backplane connector.

[0032] The longitudinal grounding plate 3 has a clearance groove 34 at its rear end for accommodating the transverse connecting part 23. The bottom of the clearance groove 34 has an insertion notch 35 for the transverse connecting part 23 to be inserted. (See attached diagram) Figure 6 Furthermore, the insertion notch 35 has a narrow opening structure with a narrow opening, and the transverse connecting part 23 fits tightly with the narrow opening of the insertion notch 35.

[0033] During assembly, first install each signal terminal 7 onto the insulating shell 1, then insert each longitudinal grounding piece 3 into the insulating shell 1 from back to front, and finally insert the transverse grounding piece 2 from back to front. After assembly, the rear ends of the transverse grounding piece 2 and the longitudinal grounding piece 3 are on the same plane.

[0034] The horizontal grounding piece 2 and the vertical grounding piece 3 are connected by the insertion of the horizontal connecting part 23 and the insertion notch 35. The contact area between the insertion notch 35 and the horizontal connecting part 23 is small, so the insertion resistance during the insertion process is also small, which facilitates assembly.

[0035] The longitudinal grounding piece 3 is provided with a positioning protrusion 4 protruding in the thickness direction, and the insulating shell 1 is provided with a positioning groove 15 for the positioning protrusion 4 to be inserted. The end wall of the positioning protrusion 4 and the positioning groove 15 are engaged during the insertion process to achieve insertion positioning.

[0036] Both the transverse grounding plate 2 and the longitudinal grounding plate 3 are provided with mounting protrusions 5 protruding in the thickness direction. The mounting protrusions 5 can be interference-fitted with the insulating shell 1, which enhances the assembly strength between the grounding plate and the insulating shell 1, and also reduces the contact area between the grounding plate and the insulating shell 1, reduces the assembly resistance, and improves the assembly efficiency.

[0037] Specific embodiment 2 of the backplane connector provided by this utility model: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that there are two types of partition beams in this embodiment. One type extends laterally and separates the longitudinally adjacent mounting parts, while the other type extends longitudinally and separates the laterally adjacent mounting parts. The two types of partition beams are connected at an intersection.

[0038] The partition beams divide the space within the frame into multiple sections arranged in a matrix. Each section has a mounting section, and the mounting sections are connected to the surrounding partition beams by connecting materials.

[0039] In this embodiment, the transverse grounding plate is disposed between the mounting part and the adjacent, transversely extending partition beam, and the longitudinal grounding plate is disposed between the mounting part and the adjacent, longitudinally extending partition beam. Both the transverse and longitudinal grounding plates are provided with clearance grooves, which are used to avoid the partition beam perpendicular to the corresponding grounding plate and the connecting material between the partition beam and the mounting part.

[0040] Specific embodiment 3 of the backplate connector provided by this utility model: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that no partition beam is provided. The mounting parts are arranged in an array within the frame. Adjacent mounting parts are connected by connecting materials in both the horizontal and vertical directions. Connecting materials are also provided between the frame and adjacent mounting parts.

[0041] The horizontal grounding plate is set between two horizontally adjacent columns of mounting parts, and the horizontal grounding plate is also set between the frame and a horizontally adjacent column of mounting parts; the vertical grounding plate is set between two vertically adjacent rows of mounting parts, and the vertical grounding plate is also set between the frame and a vertically adjacent row of mounting parts.

[0042] In this embodiment, both the transverse grounding plate and the longitudinal grounding plate are provided with clearance grooves. The clearance groove on the transverse grounding plate is located at the position where it intersects with the longitudinal grounding plate, and the clearance groove on the longitudinal grounding plate is located at the position where it intersects with the transverse grounding plate. The clearance grooves on both the transverse grounding plate and the longitudinal grounding plate are used to avoid connecting materials.

[0043] Specific embodiment 4 of the backplane connector provided by this utility model: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that no partition beam is provided. The mounting parts are arranged in an array inside the frame. Connecting materials are provided between horizontally adjacent mounting parts. Connecting materials are also provided between the frame and horizontally adjacent mounting parts. However, no connecting materials are provided between the mounting parts and their vertically adjacent mounting parts, and no connecting materials are provided between the frame and its vertically adjacent mounting parts.

[0044] The horizontal grounding plate is set between two horizontally adjacent columns of mounting parts, and the horizontal grounding plate is also set between the frame and a horizontally adjacent column of mounting parts; the vertical grounding plate is set between two vertically adjacent rows of mounting parts, and the vertical grounding plate is also set between the frame and a vertically adjacent row of mounting parts.

[0045] In this embodiment, only the longitudinal grounding plates are provided with clearance grooves, while the transverse grounding plates are not provided with clearance grooves.

[0046] Specific embodiment 5 of the backplane connector provided by this utility model: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that the longitudinal grounding plate in this embodiment does not have a clearance groove and a plug-in notch, but a plug-in narrow groove. The connecting part on the transverse grounding plate can be completely inserted into the plug-in narrow groove and fit tightly with the plug-in narrow groove. After the transverse grounding plate is inserted into place, the rear end of the transverse grounding plate and the rear end of the longitudinal grounding plate are on the same plane.

[0047] Specific embodiment 6 of the backplane connector provided by this utility model: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that the insertion notch is set on the horizontal grounding plate instead of the vertical grounding plate.

[0048] Specific embodiment 7 of the backplate connector provided by this utility model: This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that both the horizontal grounding plate and the vertical grounding plate are provided with positioning protrusions in this embodiment. Positioning grooves that can realize assembly positioning are provided at the positions corresponding to the positioning protrusions on the horizontal grounding plate and the positions corresponding to the positioning protrusions on the vertical grounding plate on the insulating shell.

[0049] Specific implementation method of the shielding mesh provided by this utility model: The shielding mesh is the same as the shielding mesh used in the aforementioned implementation of the backplate connector, and will not be described again.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A backplane connector, comprising an insulating shell (1) and a shielding mesh disposed on the insulating shell (1), the shielding mesh comprising two types of grounding plates arranged in a crisscross pattern, the space enclosed by the grounding plates being a shielding cavity for providing shielding for signal terminal pairs, characterized in that, The grounding plate is inserted into the insulating shell (1) from the end of the insulating shell (1) that corresponds to the printed circuit board. The part of the insulating shell (1) located inside the shielding cavity is a mounting part (13) for mounting signal terminal pairs. A connecting piece (14) is provided between the mounting part (13) and other parts of the insulating shell (1). At least one grounding plate has a clearance groove at the end of its insertion end that is used to connect with the adapter connector, which can avoid the connecting piece (14). The bottom of the clearance groove can stop the connecting piece (14) in the insertion direction. The clearance groove is located at the intersection of the grounding plate and another grounding plate.

2. The backplane connector according to claim 1, characterized in that, The insulating shell (1) includes a frame (11) and mounting portions (13) arranged in a matrix within the frame (11). The mounting portions (13) are provided with connecting material (14) at least between the mounting portions (13) that are laterally adjacent to it and between the laterally adjacent frame (11). The grounding piece is provided between the adjacent mounting portions (13) and between the mounting portions (13) and the frame (11).

3. The backplane connector according to claim 1, characterized in that, The insulating shell (1) includes a frame (11) and mounting parts (13) arranged in a matrix within the frame (11). The frame (11) is also provided with a partition beam (12) integrally connected to the frame (11) and separating the mounting parts (13) that are adjacent in the horizontal and / or vertical directions. The mounting parts (13) are connected to the frame (11) and the partition beam (12) in the horizontal and / or vertical directions with connecting material (14). The grounding plate is provided between the mounting part (13) and the partition beam (12) and between the mounting part (13) and the frame (11). The clearance groove on the grounding plate perpendicular to the partition beam (12) can also be used to avoid the partition beam (12).

4. The backplane connector according to any one of claims 1-3, characterized in that, Both types of grounding plates are provided with clearance grooves. The part of the grounding plate corresponding to the bottom of the clearance groove constitutes a connecting part for connecting the parts of the grounding plate on both sides of the clearance groove. One type of grounding plate is provided with a clearance groove (34) at the end corresponding to the printed circuit board to avoid the connecting part on the other type of grounding plate. The ends of the two types of grounding plates corresponding to the printed circuit board are on the same plane. One type of grounding plate is provided with a plug notch (35) for the other type of grounding plate to be inserted.

5. The backplane connector according to claim 4, characterized in that, The insertion notch (35) is only provided on the grounding plate with the clearance groove (34).

6. The backplane connector according to claim 4, characterized in that, The insertion notch (35) has a narrow opening structure with a narrow opening. The grounding piece used to connect and cooperate with the insertion notch (35) is tightly fitted with the narrow opening of the insertion notch (35).

7. The backplane connector according to any one of claims 1-3, characterized in that, At least one grounding piece is provided with a positioning protrusion (4) protruding in the thickness direction, and the insulating shell (1) is provided with a positioning groove for the positioning protrusion (4) to be inserted. The positioning protrusion (4) and the end wall of the positioning groove are engaged to stop and cooperate during the insertion process to achieve insertion positioning.

8. A shielding mesh comprising two types of grounding plates arranged in a crisscross pattern, wherein the space enclosed by the grounding plates is a shielding cavity for providing shielding for signal terminal pairs, characterized in that, At least one grounding plate has a clearance groove at one end for insertion with an adapter connector, which can avoid the connecting material (14) on the insulating shell (1) of the backplate connector. The bottom of the clearance groove can stop the connecting material (14) in the insertion direction. The clearance groove is located at the intersection of the grounding plate and another grounding plate.

9. The shielding mesh according to claim 8, characterized in that, Both types of grounding plates are provided with clearance grooves. The part of the grounding plate corresponding to the bottom of the clearance groove constitutes a connecting part for connecting the parts of the grounding plate on both sides of the clearance groove. One type of grounding plate is provided with a clearance groove (34) at the end corresponding to the printed circuit board to avoid the connecting part on the other type of grounding plate. The ends of the two types of grounding plates corresponding to the printed circuit board are on the same plane. One type of grounding plate is provided with a plug notch (35) for the other type of grounding plate to be inserted.

10. The shielding mesh according to claim 9, characterized in that, The insertion notch (35) is only provided on the grounding plate with the clearance groove (34).

11. The shielding mesh according to claim 9 or 10, characterized in that, The insertion notch (35) has a narrow opening structure with a narrow opening. The grounding piece used to connect and cooperate with the insertion notch (35) is tightly fitted with the narrow opening of the insertion notch (35).

12. The shielding mesh according to any one of claims 8-10, characterized in that, At least one grounding piece is provided with a positioning protrusion (4) protruding in the thickness direction. The positioning protrusion (4) is used to stop and cooperate with the end wall of the positioning groove during the insertion process to achieve insertion positioning.

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