EMC shielding structure

Abstract

The utility model discloses an EMC shielding structure. The EMC shielding structure comprises a shell, an EMC shielding plate arranged in the shell, first limiting slots which are arranged on the inner side surface of the shell and correspond to the positions of the end parts of the EMC shielding plate, and a combination assembly which is used for combining the EMC shielding plate with the shell. According to the EMC shielding structure disclosed by the utility model, the number of combination assemblies can be reduced, and the assembling efficiency of the EMC shielding plate and the shell can be improved.

Description

Technical Field

[0001] This utility model relates to electromagnetic shielding technology, and in particular to an EMC shielding structure. Background Technology

[0002] An inverter is a converter that transforms direct current (DC) energy (from batteries or storage devices) into alternating current (AC). It consists of an inverter bridge, control logic, and filtering circuits. Due to the high power density requirements of inverters, the layout of low-voltage connectors is limited, which can lead to interference from high-voltage current signals with low-voltage control signals. This can cause abnormal inverter control signals and generate EMC (Electromagnetic Compatibility) issues. To solve this problem, a common EMC shielding method is to use bolts to fix an EMC shielding plate inside the housing. Specifically, the EMC shielding plate and the corresponding sides of the equipment housing enclose a shielding area. Typically, the EMC shielding plate is a non-flat block structure formed by connecting several sheet metal parts together or by molding a single piece; common structures include L-shapes and T-shapes. When fixing the EMC shielding plate with bolts, several sets of bolts are usually screwed at intervals into various areas of the EMC shielding plate to secure it. This increases the installation time of the EMC shielding plate and requires several bonding structures to securely connect the EMC shielding plate to the bottom of the equipment housing. These bonding structures are not simply a matter of creating a single through hole; often, multiple bonding blocks need to be added to the EMC shielding plate to bond with the equipment housing. Bonding holes are created on the bonding blocks, and multiple bonding holes also need to be created on the equipment housing. Multiple bolts are used to connect the corresponding bonding holes one by one to achieve the bonding between the EMC shielding plate and the housing. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an EMC shielding structure.

[0004] To solve the above-mentioned technical problems, the present invention provides an EMC shielding structure, including a housing, an EMC shielding plate disposed within the housing, a first limiting slot disposed on the inner side of the housing corresponding to each end position of the EMC shielding plate, and a connecting component for connecting the EMC shielding plate to the housing.

[0005] Furthermore, the bottom surface of the housing is provided with a second limiting slot for limiting the lower end of the EMC shielding plate, and a circuit board is provided inside the housing. The circuit board is provided with a slit for the EMC shielding plate to pass through freely. The lower end of the EMC shielding plate passes through the slit and is inserted into the second limiting slot.

[0006] Furthermore, the EMC shielding plate has a first lower edge with a higher lower end face and a second lower edge with a lower lower end face; the first lower edge is higher than the top surface of the circuit board to form a clearance space with it, and the second lower edge passes downward through the slot and is inserted into the second limiting slot.

[0007] Furthermore, the upper end of the EMC shielding plate is pressed against the housing via conductive foam; a positioning groove for positioning the conductive foam is provided on the housing at a position corresponding to the upper end of the EMC shielding plate, and the conductive foam is adhered to the positioning groove; the upper end of the EMC shielding plate is bent to form a flange that is pressed against the conductive foam, and the width of the flange is adapted to the width of the conductive foam.

[0008] Furthermore, the combining components are configured as a group; and / or

[0009] The connecting component is a bolted connection component.

[0010] Furthermore, the bolted assembly includes an internally threaded protrusion disposed on the bottom surface of the housing, a connecting block disposed on the EMC shielding plate, and a bolt; the circuit board inside the housing contacts the top surface of the internally threaded protrusion, and the connecting block contacts the top surface of the circuit board; the connecting block and the circuit board are respectively provided with a first through hole and a second through hole coaxial with the internally threaded hole of the internally threaded protrusion; the bolt passes through the first through hole and the second through hole in sequence and is screwed into the internally threaded hole to press the connecting block against the top surface of the circuit board.

[0011] Furthermore, the connecting block is formed by stamping the lower end of the EMC shielding plate, and the connecting block is arranged horizontally perpendicular to the EMC shielding plate.

[0012] Furthermore, a window is formed on the EMC shielding plate below the connecting block, and the window extends downward through the EMC shielding plate; a stop block is provided on the top surface of the internally threaded protrusion, extending upward into the window, and the height of the top surface of the stop block is adapted to the height of the bottom surface of the connecting block.

[0013] Furthermore, the EMC shielding plate is in the shape of a straight line, an L-shape, a T-shape, or an F-shape.

[0014] Furthermore, the housing includes a bottom shell and a top shell that overlap each other, the first limiting slot extends inward and upward through the inner side of the bottom shell; the EMC shielding plate is disposed inside the bottom shell through the connecting assembly, and the EMC shielding plate abuts against the top shell.

[0015] The EMC shielding structure of this utility model has at least the following beneficial effects: By setting a first limiting slot at the position corresponding to each end of the EMC shielding plate on the housing, and setting a second limiting slot at the position corresponding to the lower end face of the EMC shielding plate on the bottom surface of the housing, when the EMC shielding plate is assembled onto the housing, each end and lower end face of the EMC shielding plate is preferentially inserted into the corresponding first and second limiting slots, thereby limiting the EMC shielding plate in the horizontal direction. Its advantages are: on the one hand, when the EMC shielding plate is combined with the housing through the connecting components, it has a positioning function for the EMC shielding plate, reducing assembly time and improving combination efficiency; on the other hand, since the EMC shielding plate is limited in the horizontal direction, the number of connecting components can be reduced. For example, in the above embodiment, only one set of connecting components can be used to limit the height of the EMC shielding plate, reducing the number of connecting component sets while ensuring stable combination between the EMC shielding plate and the housing. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of one embodiment of the EMC shielding structure of this utility model.

[0018] Figure 2 This is an exploded view of one embodiment of the EMC shielding structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the top shell in one embodiment of the EMC shielding structure of this utility model. In the figure, the lower side of the top shell faces upward.

[0020] Figure 4 This is a schematic diagram of the structure of the EMC shielding structure of this utility model after the top shell is hidden.

[0021] Figure 5 yes Figure 4 Sectional view of AA.

[0022] Figure 6 yes Figure 5 A magnified view of part B in the middle.

[0023] Figure 7 This is a schematic diagram of one embodiment of the EMC shielding structure of this utility model, with the top shell hidden in the diagram.

[0024] Figure 8 This is a schematic diagram of one embodiment of the EMC shielding structure of this utility model, with the top shell hidden in the diagram.

[0025] The diagrams in the instruction manual are labeled as follows:

[0026] Housing 100; Fixing post 101; Bottom shell 110; Top shell 120; Positioning groove 121; EMC shielding plate 200; EMC shielding plate 200'; EMC shielding plate 200”; Flanged edge 201; First lower edge 202; Second lower edge 203; Third lower edge 204; Horizontal plate 210; Horizontal plate 210”; Vertical plate 220; Vertical plate 220”; Window 230; Clearance space 300; First limiting slot 310; Second limiting slot 320; Connecting assembly 400; Internally threaded protrusion 410; Internally threaded hole 411; Stop block 412; Connecting block 420; First through hole 431; Second through hole 432; Circuit board 500; Slit 501; Gap 502. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0030] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 This is a schematic diagram of one embodiment of the EMC shielding structure of this utility model. Figure 2 This is an exploded view of one embodiment of the EMC shielding structure of this utility model. Figure 3 This is a schematic diagram of the top shell structure in one embodiment of the EMC shielding structure of this utility model. Figure 4 This is a schematic diagram of the structure of the EMC shielding structure of this utility model after the top shell is hidden. Figure 1 , Figure 2 , Figure 3 and Figure 4 In the illustrated embodiment, the EMC shielding structure includes a housing 100, an EMC shielding plate 200 disposed within the housing 100, a first limiting slot 310 disposed on the inner side of the housing 100 corresponding to each end position of the EMC shielding plate 200, and a connecting component 400 for connecting the EMC shielding plate 200 to the housing 100.

[0031] The EMC shielding structure can be applied to any electronic device (e.g., an inverter) that requires electromagnetic shielding through this EMC shielding structure. When the EMC shielding structure is applied to the inverter, the housing 100 is configured as the housing 100 of the inverter. A circuit board 500 is disposed inside the housing 100. The circuit board 500 is detachably fixed inside the housing 100 by a fixing post 101 disposed on the housing 100. Therefore, a certain gap 502 is formed between the circuit board 500 and the inner bottom surface (hereinafter referred to as the bottom surface) of the housing 100 (see...). Figure 6 The width of the gap 502 is determined according to the height of the fixing post 101. A slit 501 is provided on the circuit board 500 at the position corresponding to the EMC shielding sheet, allowing the EMC shielding plate 200 to pass freely. The slit 501 extends through the circuit board 500 along its thickness direction. The lower end of the EMC shielding plate 200 passes through the circuit board 500 and abuts against the bottom surface of the housing 100. The connecting assembly 400 connects the EMC shielding plate 200 to the housing 100, thereby separating the electronic component areas requiring shielding on the circuit board 500 from other electronic component areas, thus forming effective shielding.

[0032] The housing 100 includes a bottom shell 110 and a top shell 120 that overlap each other. The circuit board 500 and the EMC shielding plate 200 mentioned above are both disposed within the bottom shell 110. When the top shell 120 is placed on top of the bottom shell 110, the lower side of the top shell 120 abuts against the top of the EMC shielding plate 200. The first limiting slot 310 mentioned above is disposed on the inner side of the bottom shell 110 at a position corresponding to each end of the EMC shielding plate 200. The first limiting slot 310 extends inward and upward through the bottom shell 110. When the EMC shielding plate 200 is inserted, the end of the EMC shielding plate 200 is inserted into the corresponding first limiting slot 310 from top to bottom, so that the EMC shielding plate 200 is horizontally limited in the first limiting slot 310 in its thickness direction. Based on this, since the EMC shielding plate 200 is limited in the horizontal direction by the first limiting slot 310, only one set of connecting components 400 is needed to limit the EMC shielding plate 200 in the vertical direction. On the one hand, reducing the number of connecting components 400 can reduce the manufacturing complexity of the EMC shielding plate 200; on the other hand, it can improve assembly efficiency. Of course, the use of one set of connecting components 400 described here is a preferred solution, and in different embodiments, the number of connecting components 400 can be set according to the actual needs of the user. Therefore, the quantifier "one set" here should not be used to limit the scope of protection of this application.

[0033] Preferably, the bottom surface of the bottom shell 110 is provided with a second limiting slot 320 for limiting the lower end of the EMC shielding plate 200. The lower end of the EMC shielding plate 200 is inserted into the second limiting slot 320 after passing through the slot 501. Thus, by providing corresponding limiting slots on the inner side of the shell 100 corresponding to each edge of the EMC shielding plate 200 (excluding the upper edge, including the end edges and the lower edge), the edges of the EMC shielding plate 200 are horizontally limited from multiple directions, improving the limiting stability performance of the EMC shielding plate 200 and preventing horizontal displacement of the edges of the EMC shielding plate 200. Furthermore, the first limiting slot 310 and the second limiting slot 320 also wrap around each edge of the EMC shielding plate 200 except for the upper end surface, improving the shielding performance.

[0034] The EMC shielding plate 200 is typically configured as a sheet metal part. In the illustrated embodiment, the EMC shielding plate 200 is L-shaped, having a transversely distributed transverse plate 210 and a longitudinal plate 220 perpendicularly connected to the transverse plate. The transverse plate 210 and the longitudinal plate 220 can be integrally bent or welded together. Corresponding to the L-shaped EMC shielding plate 200, a first limiting slot 310 is provided at corresponding positions on two adjacent inner sides of the housing 100. Specifically, a first limiting slot 310 is provided at the end position of the transverse plate 210 on one inner side, and a first limiting slot 310 is provided at the end position of the longitudinal plate 220 on the other inner side. The lower wall of each first limiting slot 310 is not lower than the upper surface of the circuit board 500.

[0035] The upper surface of the EMC shielding plate 200 can be configured to be pressed against the top shell 120 via conductive foam (not shown). To facilitate the positioning and installation of the conductive foam, a positioning groove 121 for positioning the conductive foam is provided on the top shell 120 at a position corresponding to the upper surface of the EMC shielding plate 200. The conductive foam can be adhered to the positioning groove 121, improving the installation efficiency of the conductive foam. More preferably, to increase the contact area between the conductive foam and the upper surface of the EMC shielding plate 200 and improve the connection stability between them, the upper edge of the EMC shielding plate 200 is bent to form a flange 201.

[0036] In the illustrated embodiment, the EMC shielding plate 200 has a first lower edge 202 with a higher lower end face and a second lower edge 203 with a lower lower end face. The first lower edge 202 is located above the top surface of the circuit board 500 to form a clearance space 300. This clearance space 300 is used to allow adhesive to pass through and to avoid the cured adhesive when applying adhesive to the circuit board 500 (fully covering the electronic components of the circuit board 500 to form effective protection and ensure waterproof isolation performance). In addition, the distribution position of the clearance space 300 can also determine the flow path of the adhesive, control the flow direction of the adhesive, and protect the internal components. Specifically, the lower edges of the two ends of the transverse plate 210 are configured as third lower edges 204, and the height of the third lower edges 204 can be the same as the height of the first lower edge 202. The lower edge of the transverse plate 210 located between the two third lower edges 204 is configured as the second lower edge 203, and the second lower edge 203 is lower than the first lower edge 202 and the third lower edge 204. The lower edge of the longitudinal plate 220 is configured as the first lower edge 202, and the lower ends of the transverse plate 210 and the longitudinal plate 220 are also recessed upwards with clearance grooves. The slot 501 mentioned above is provided on the circuit board 500 at a position corresponding to the second lower edge 203, and the second limiting slot 320 is provided on the bottom surface at a position corresponding to the second lower edge 203. The second lower edge 203 freely passes through the slot 501 and is inserted and limited in the second limiting slot 320. The height of the lower side wall of the first limiting slot 310 corresponding to the end of the longitudinal plate 220 is adapted to the height of the first lower edge 202. When the end of the longitudinal plate 220 is inserted into the first limiting slot 310, the clearance space 300 is formed between the first lower edge 202 of the longitudinal plate 220 and the circuit board 500. The height of the lower side wall of the first limiting slot 310 corresponding to the end of the horizontal plate 210 described above is adapted to the height of the third lower edge 204. When both ends of the EMC shielding plate 200 are inserted into the corresponding first limiting slot 310, the second lower edge 203 of the EMC shielding plate 200 is horizontal rather than inclined, so as to ensure that the second lower edge 203 of the EMC shielding plate 200 is better inserted into the second limiting slot 320.

[0037] Please see Figure 5 and Figure 6The coupling assembly 400 can be configured as a bolt coupling assembly 400, which includes an internally threaded protrusion 410 disposed on the bottom surface of the housing 100 (bottom surface of the bottom shell 110), a coupling block 420 disposed on the EMC shielding plate 200, and a bolt (not shown). The circuit board 500 contacts the top surface of the internally threaded protrusion 410, and the coupling block 420 contacts the top surface of the circuit board 500. The coupling block 420 and the circuit board 500 are respectively provided with a first through hole 431 and a second through hole 432 coaxial with the internally threaded hole 411 of the internally threaded protrusion 410. The bolt passes through the first through hole 431 and the second through hole 432 in sequence and is screwed into the internally threaded hole 411 to press the coupling block 420 against the top surface of the circuit board 500, thereby indirectly pressing it against the internally threaded protrusion 410 through the circuit board 500.

[0038] Using the EMC shielding plate 200 described above as an example, the bolt-fitting assembly 400 will be further illustrated. Specifically, the internally threaded protrusion 410 is disposed on the bottom surface of the bottom shell 110 at a position corresponding to the second lower edge 203 (it may be located at the middle section of the second lower edge 203). The internally threaded protrusion 410 is at the same height as the fixing post 101 that fixes the circuit board 500, and the lower surface of the circuit board 500 is supported by the upper surface of the fixing post 101 and the internally threaded protrusion 410. The connecting block 420 is disposed at the second lower edge 203 at a position corresponding to the internally threaded protrusion 410. The connecting block 420 can be formed by stamping the lower end of the EMC shielding plate 200, and the connecting block 420 is arranged horizontally perpendicular to the EMC shielding plate 200. Since the connecting block 420 is formed on the EMC shielding plate 200 by a stamping process, a window 230 located below the connecting block 420 is formed on the EMC shielding plate 200 (see...). Figure 2 The window 230 extends downward through the EMC shielding plate 200. In a preferred embodiment, the top surface of the internally threaded protrusion 410 is provided with a stop 412 extending upward into the window 230. The height of the top surface of the stop 412 matches the height of the bottom surface of the connecting block 420. Thus, after the stop 412 and the bottom surface of the connecting block 420 come into contact, the window 230 created by the stamping process can be completely sealed, further preventing signal crosstalk and improving shielding performance.

[0039] It should be understood that the location of the bolted assembly 400 may be determined according to the actual needs of different implementations and the specific structure of the EMC shielding plate 200. The above description of the location should not be used to limit the scope of protection of this application.

[0040] Please see Figure 7This is a schematic diagram of one embodiment of the EMC shielding structure of this utility model. Figure 7 In the illustrated embodiment, the EMC shielding structure includes a housing, an EMC shielding plate 200', and connecting components that are structurally or functionally similar to those in the above embodiments. The subtle difference in this embodiment lies in the slightly different shape and structure of the EMC shielding plate 200'.

[0041] In this embodiment, the EMC shielding plate 200' is in a straight line shape, that is, the EMC shielding plate 200' is a horizontal plate. Correspondingly, the first limiting slot is provided on both inner sides of the housing at positions corresponding to the two ends of the horizontal plate. In this embodiment, the EMC shielding plate 200' can also be configured to have a first lower edge and a second lower edge with different heights. The structure of the first lower edge and the second lower edge, and their assembly relationship with the circuit board and the housing, can be found in the description of the above embodiment. In this embodiment, the EMC shielding plate 200' can also be configured to have its upper end face pressed against the housing through conductive foam. The structure of the upper end face and its assembly relationship with the housing can be found in the description of the above embodiment. In this embodiment, the connecting assembly can also adopt the same or similar bolted connecting assembly as described in the above embodiment. Its structure and assembly method can be found in the description of the above embodiment.

[0042] Please see Figure 8 , Figure 8 This is a schematic diagram of one embodiment of the EMC shielding structure of this utility model. Figure 8 In the illustrated embodiment, the EMC shielding structure includes a housing, an EMC shielding plate 200", and connecting components that are structurally or functionally similar to those in the above embodiments. The subtle difference in this embodiment lies in the slightly different shape and structure of the EMC shielding plate 200".

[0043] In this embodiment, the EMC shielding plate 200” is T-shaped, that is, the EMC shielding plate 200” includes a horizontal plate 210” and a vertical plate 220”, the vertical plate 220” being disposed in the middle section of the horizontal plate 210” and perpendicular to it. Correspondingly, the first limiting slot is provided at the two ends of the horizontal plate 210” on the two inner sides of the housing in the horizontal direction, and the first limiting slot is also provided at the end of the vertical plate 220” on one inner side of the housing in the vertical direction. In this embodiment, the EMC shielding plate 200” can also be configured to have a first lower edge and a second lower edge with different heights. The structure of the first lower edge and the second lower edge, and their assembly relationship with the circuit board and the housing, can be found in the description of the above embodiment. In this embodiment, the EMC shielding plate 200” can also be configured such that its upper end face is pressed against the housing through conductive foam. The structure of the upper end face and its assembly relationship with the housing can be found in the description of the above embodiment. In this embodiment, the connecting assembly can also adopt the same or similar bolted connecting assembly as described in the above embodiment, and its structure and assembly method can be found in the description of the above embodiment.

[0044] It should be understood that the structure of the EMC shielding plate 200” is not limited to the straight, L-shaped, T-shaped, etc. mentioned above. The EMC shielding plate 200” can also be other structures, such as F-shaped, etc.

[0045] Based on the above embodiments, the EMC shielding structure of this utility model has at least the following beneficial effects: By setting a first limiting slot at the position corresponding to each end of the EMC shielding plate on the housing, and setting a second limiting slot at the position corresponding to the lower end face of the EMC shielding plate on the bottom surface of the housing, when the EMC shielding plate is assembled onto the housing, each end and lower end face of the EMC shielding plate are preferentially inserted into the corresponding first and second limiting slots, thereby limiting the EMC shielding plate in the horizontal direction. The advantages are: on the one hand, when the EMC shielding plate is combined with the housing through the connecting components, it has a positioning function for the EMC shielding plate, reducing assembly time and improving the joining efficiency; on the other hand, since the EMC shielding plate is limited in the horizontal direction, the number of connecting components can be reduced. For example, in the above embodiments, only one set of connecting components can be used to limit the height of the EMC shielding plate, reducing the number of connecting component sets while ensuring stable joining between the EMC shielding plate and the housing.

[0046] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An EMC shielding structure comprising a housing and an EMC shielding plate disposed within the housing, characterised in that: It also includes a first limiting slot disposed on the inner side of the housing corresponding to each end position of the EMC shielding plate, and a coupling assembly for joining the EMC shielding plate to the housing.

2. An EMC shielding structure as claimed in claim 1, characterised in that: The bottom surface of the housing is provided with a second limiting slot for limiting the lower end of the EMC shielding plate, and a circuit board is provided inside the housing. The circuit board is provided with an opening for the EMC shielding plate to pass through freely. The lower end of the EMC shielding plate passes through the opening and is inserted into the second limiting slot.

3. An EMC shielding structure as claimed in claim 2, characterised in that: The EMC shielding plate has a first lower edge with a higher lower end face and a second lower edge with a lower lower end face; the first lower edge is higher than the top surface of the circuit board to form a clearance space with it, and the second lower edge passes downward through the slot and is inserted into the second limiting slot.

4. The EMC shielding structure of claim 1, wherein: The upper end of the EMC shielding plate is pressed to the housing via conductive foam; a positioning groove for positioning the conductive foam is provided on the housing at a position corresponding to the upper end of the EMC shielding plate, and the conductive foam is adhered to the positioning groove; the upper end of the EMC shielding plate is bent to form a flange that is pressed to the conductive foam, and the width of the flange is adapted to the width of the conductive foam.

5. The EMC shielding structure of claim 1, wherein: The combined components are configured as a group; and / or The connecting component is a bolted connection component.

6. An EMC shielding structure as claimed in claim 5, characterised in that: The bolted assembly includes an internally threaded protrusion disposed on the bottom surface of the housing, a connecting block disposed on the EMC shielding plate, and a bolt; the circuit board inside the housing contacts the top surface of the internally threaded protrusion, and the connecting block contacts the top surface of the circuit board. The connecting block and the circuit board are respectively provided with a first through hole and a second through hole coaxial with the internally threaded hole of the internally threaded protrusion; the bolt passes through the first through hole and the second through hole in sequence and is screwed into the internally threaded hole to press the connecting block against the top surface of the circuit board.

7. An EMC shielding structure as claimed in claim 6, characterised in that: The connecting block is formed by stamping the lower end of the EMC shielding plate, and the connecting block is arranged horizontally perpendicular to the EMC shielding plate.

8. An EMC shielding structure as claimed in claim 7, characterised in that: A window is formed on the EMC shielding plate below the connecting block, and the window extends downward through the EMC shielding plate; a stop block is provided on the top surface of the internally threaded protrusion, which extends upward into the window, and the height of the top surface of the stop block is adapted to the height of the bottom surface of the connecting block.

9. An EMC shielding structure as claimed in claim 1, characterised in that: The EMC shielding plate is in the shape of a straight line, an L-shape, a T-shape, or an F-shape.

10. The EMC shielding structure of claim 1, wherein: The housing includes a bottom shell and a top shell that overlap each other, and the first limiting slot extends inward and upward through the inner side of the bottom shell; the EMC shielding plate is disposed inside the bottom shell through the connecting assembly, and the EMC shielding plate abuts against the top shell.

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