Electromagnetic shielding plate and electronic product

Abstract

The utility model discloses an electromagnetic shielding plate, comprising: at least one protrusion for grounding; a first insulating part, the first insulating part is an integrally formed structural part, and the first insulating part is arranged on the surface of the electromagnetic shielding plate excluding the protrusion; a second insulating part, the second insulating part is arranged on the protrusion, and part of the second insulating part is connected to the first insulating part, and the first insulating part and the second insulating part do not include a powder coating. The utility model can avoid problems such as uneven coating thickness and cracks in the coating after long-term use, resulting in insulation failure. The solution can also specifically enhance the insulation performance at the vias and protrusions, further avoiding the problem of insulation failure at the vias and protrusions. The utility model also provides an electronic product.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic shielding, in particular to an electromagnetic shielding plate and an electronic product. Background Art

[0002] Electromagnetic compatibility (EMC) refers to the ability of electronic equipment to work normally in an electromagnetic environment without mutual interference.

[0003] EMC is divided into two parts: EMS (electromagnetic susceptibility) and EMI (Electromagnetic interference). EMS refers to the ability of electronic equipment to work normally in an electromagnetic environment without being disturbed by external electromagnetic fields. Electronic equipment needs to have sufficient anti-interference capabilities to ensure stable and reliable operation in an electromagnetic environment. EMI refers to the phenomenon that electronic equipment is affected by external electromagnetic fields, resulting in equipment performance degradation or failure. Electromagnetic interference can come from various electromagnetic sources such as power supply, communication signals, lightning, etc. If the equipment does not have sufficient anti-interference capabilities, it is easily affected by electromagnetic interference.

[0004] Usually, in order to improve the EMC performance of electronic products, it is necessary to place a shielding plate inside the electronic product. High-voltage components of the electronic product are usually arranged on both sides of the shielding plate. Therefore, it is necessary to set an insulating medium on the surface of the shielding plate. However, due to the limitation of the structural space and the uneven thickness of the insulating medium on the surface of the shielding plate, the insulating medium in the prior art is prone to insulation failure. For example, when spraying powder on the surface of the shielding plate to form a coating, it is difficult to control the thickness of the powder spraying, especially at the holes, protrusions and other positions on the shielding plate. It is difficult to ensure that the thickness of the aforementioned positions is consistent with that of other positions during powder spraying. The powder spraying thickness at the aforementioned positions is usually thinner, which is more prone to insulation failure. In addition, the processing through complex processes such as hot riveting or powder spraying is costly. Utility Model Content

[0005] The purpose of the utility model is to solve the technical problems in the prior art that the processing cost of the insulating medium on the surface of the shielding plate is high and insulation failure is easy to occur. The utility model provides an electromagnetic shielding plate with good insulation performance, high reliability and no insulation failure problem, simple manufacturing process and low cost.

[0006] In order to solve the above technical problems, the embodiment of the utility model discloses an electromagnetic shielding plate, comprising:

[0007] at least one protrusion for grounding;

[0008] A first insulating portion, the first insulating portion is an integrally formed structural member, and the first insulating portion is provided on a surface of the electromagnetic shielding plate excluding the protrusion;

[0009] The second insulating part is arranged on the convex part, and a part of the second insulating part is connected to the first insulating part, and the first insulating part and the second insulating part do not include a powder coating.

[0010] By adopting the above technical solution, a first insulating part is arranged on the surface of the electromagnetic shielding plate excluding vias and protrusions, the first insulating part does not include a powder coating, and the first insulating part is integrally formed. Therefore, the thickness of the first insulating part on the electromagnetic shielding plate is uniform, the quality consistency is high, and the insulation effect is good. It can avoid problems such as uneven coating thickness and easy cracking of the coating after long-term use, resulting in insulation failure. In addition, the present application sets a second insulating part at the vias and protrusions, and the second insulating part does not include a powder coating, which can specifically enhance the insulation performance at the vias and protrusions, and further avoid the problem of insulation failure at the vias and protrusions.

[0011] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses an electromagnetic shielding plate, wherein the first insulating part includes a plastic film or insulating paper.

[0012] According to another specific embodiment of the present utility model, an electromagnetic shielding plate is disclosed in the embodiment of the present utility model, wherein the plastic film includes a PET film or a PI film.

[0013] By adopting the above technical scheme, plastic film or insulating paper is respectively covered on both sides of the electromagnetic shielding plate. On the one hand, the plastic film or insulating paper is integrally arranged to cover both sides of the electromagnetic shielding plate. The thickness of the plastic film or insulating paper is uniform, and there will be no problem of insulation failure caused by uneven thickness. On the other hand, since the thickness of the plastic film or insulating paper is small, the space required in the thickness direction of the electromagnetic shielding plate is small. Therefore, in a limited installation space, the thickness of the electromagnetic shielding plate can be selected in a wider range, which can effectively improve the NVH (Noise, Vibration, and Harshness) performance of the electromagnetic shielding plate.

[0014] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses an electromagnetic shielding plate, wherein the second insulating part includes liquid silicone.

[0015] By adopting the above technical solution, liquid silicone is covered on the positions such as protrusions and vias where plastic film cannot be pasted, so as to meet the insulation withstand voltage requirements of the electromagnetic shielding plate. After curing, the liquid silicone becomes an elastomer and will not have problems such as cracks and insulation failure. In addition, the quality consistency of liquid silicone in the manufacturing process is high and the process is simple, which is suitable for automated mass production.

[0016] According to another specific embodiment of the utility model, the embodiment of the utility model discloses an electromagnetic shielding plate, which includes a first surface and a second surface arranged opposite to each other along a first direction, the first insulating portion covers the first surface and the second surface, and the protrusion protrudes outward from the first surface along the first direction.

[0017] According to another specific embodiment of the utility model, the embodiment of the utility model discloses an electromagnetic shielding plate,

[0018] The electromagnetic shielding plate further comprises:

[0019] at least one via hole, the via hole passing through the first surface and the second surface, the via hole and the convex portion being arranged at intervals,

[0020] The second insulating portion includes a first portion and a second portion, the first portion is disposed at the via hole, and the second portion is disposed at the protrusion.

[0021] According to another specific embodiment of the utility model, an embodiment of the utility model discloses an electromagnetic shielding plate, along the first direction, the first part includes an upper part, a middle part and a lower part, the middle part circumferentially covers the hole wall of the via hole, the upper part is connected to the first insulating part of the first surface, and the lower part is connected to the first insulating part of the second surface.

[0022] By adopting the above technical solution, the liquid silicone can be connected to the metal material of the electromagnetic shielding plate and the plastic material of the first insulating part at the same time, which can give full play to the advantage of the greater bonding strength of the liquid silicone and metal and plastic to improve the overall connection reliability.

[0023] According to another specific embodiment of the utility model, the embodiment of the utility model discloses an electromagnetic shielding plate, the protrusion includes an electrical connection part, the electrical connection part is not provided with the first insulating part and the second insulating part, and the second insulating part covers the part of the protrusion that does not include the electrical connection part.

[0024] By adopting the above technical solution, it can be ensured that no insulating medium is provided on the surface of the electrical connection part, thereby ensuring that the electromagnetic shielding plate can be stably grounded and that the electromagnetic shielding plate can work normally.

[0025] According to another specific embodiment of the utility model, the embodiment of the utility model discloses an electromagnetic shielding plate, which includes a reinforcing portion for improving the supporting strength of the electromagnetic shielding plate, the reinforcing portion is protruding from the second surface, and the surface of the reinforcing portion is covered with the first insulating portion.

[0026] By adopting the above technical solution and providing the reinforcing part, the supporting strength of the electromagnetic shielding plate can be improved.

[0027] The embodiment of the utility model further discloses an electronic product, which at least comprises the electromagnetic shielding plate in any one of the above embodiments.

[0028] According to another specific implementation of the present utility model, an implementation of the present utility model discloses an electronic product, and the electronic product includes an inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram showing coatings of shielding plates in some embodiments.

[0030] Figure 2 A front perspective schematic diagram of an electromagnetic shielding plate provided by some embodiments is shown.

[0031] Figure 3 A top view of an electromagnetic shielding plate provided by some embodiments is shown.

[0032] Figure 4 A bottom view of an electromagnetic shielding plate provided by some embodiments is shown.

[0033] Figure 5 A partial cross-sectional schematic diagram of an electromagnetic shielding plate provided by some embodiments is shown.

[0034] Figure 6 A schematic diagram showing a protrusion of an electromagnetic shielding plate provided by some embodiments.

[0035] Figure 7 A back perspective schematic diagram of an electromagnetic shielding plate provided by some embodiments is shown.

[0036] Figure 8 A local simplified schematic diagram of an inverter of an electromagnetic shielding plate provided by some embodiments is shown. DETAILED DESCRIPTION

[0037] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0038] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0039] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0040] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0041] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0042] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] See also Figure 1In some embodiments, a shielding plate 10 is provided, wherein insulating powder is sprayed on the upper surface 13 and the lower surface 14 of the shielding plate to form a first coating 11 on the upper surface 13 of the shielding plate and a second coating 12 on the lower surface 14. The above technical solution is used to improve the insulation performance of the surface of the shielding plate 10, and the above technical solution has at least the following disadvantages:

[0044] ① When spraying powder on the surface of the shielding plate 10, the powder spraying thickness is difficult to control, resulting in uneven thickness distribution of the first coating 11 or the second coating 12 on the surface of the shielding plate 10. Insulation failure is prone to occur at locations where the coating thickness is thinner, especially at holes, protrusions and other locations on the shielding plate 10. It is difficult to ensure that the thickness at the aforementioned locations is consistent with that at other locations during powder spraying. The powder spraying thickness at the aforementioned locations is usually thinner, which makes insulation failure more likely to occur.

[0045] ② The coating formed by powder spraying is prone to cracks during long-term use, and may even fall off the shielding plate 10, thereby causing insulation failure.

[0046] ③ During the powder spraying process, for areas on the shielding plate 10 that do not require insulation treatment, they usually need to be masked with manual stickers before powder spraying, which is a more complicated operation; or after the powder spraying is completed, the coating is removed by laser, but this method is costly and easily damages the surface of the shielding plate 10, causing it to be unable to perform its corresponding function.

[0047] See also Figure 2 In some embodiments, the present application provides an electromagnetic shielding plate 100, including a first insulating portion 101, a second insulating portion 102 (see Figures 4 to 6 ), at least one via 103 and at least one convex portion 104, the via 103 can be used, for example, for connecting components of electronic products through the via 103; the convex portion 104 is used to ground the electromagnetic shielding plate 100, and the via 103 and the convex portion 104 are arranged at intervals; the first insulating portion 101 is arranged on the surface of the electromagnetic shielding plate 100 excluding the via 103 and the convex portion 104; the second insulating portion 102 is arranged on the via 103 and the convex portion 104, and part of the second insulating portion 102 is connected to the first insulating portion 101, and the first insulating portion 101 and the second insulating portion 102 do not include a powder coating. Exemplarily, the shape of the electromagnetic shielding plate 100 is an irregular heptagon as a whole. It can be understood that the present application does not limit the shape of the electromagnetic shielding plate 100, for example, the electromagnetic shielding plate 100 can also be a regular or irregular quadrilateral, pentagon, hexagon or other polygon. Although the electromagnetic shielding plate 100 shown in some embodiments includes the via hole 103 , it should be understood that in other embodiments, the electromagnetic shielding plate of the present application may not include the via hole 103 .

[0048] In some embodiments, see Figure 2 , Figure 3 , Figure 4 , for ease of understanding, Figure 3 The first insulating portion 101 is not shown. Figure 4 The mesh lines are used to indicate that the first insulating portion 101 covers the second surface 106. The electromagnetic shielding plate 100 includes a first surface 105 and a second surface 106 that are opposite to each other along a first direction X, the first insulating portion 101 covers the first surface 105 and the second surface 106, the convex portion 104 protrudes outward from the first surface 105 along the first direction X, and the via 103 passes through the first surface 105 and the second surface 106.

[0049] By adopting the above technical scheme, a first insulating part 101 is arranged on the surface of the electromagnetic shielding plate 100 excluding the via holes 103 and the protrusions 104, and a second insulating part 102 is arranged at the via holes 103 and the protrusions 104, and neither the first insulating part 101 nor the second insulating part 102 includes a powder coating, thereby avoiding problems such as uneven coating thickness and cracks in the coating after long-term use, leading to insulation failure. The present scheme can also specifically enhance the insulation performance at the via holes 103 and the protrusions 104, further avoiding the problem of insulation failure at the via holes 103 and the protrusions 104.

[0050] In some embodiments, see Figure 2 , Figure 3 , Figure 4 , the first insulating part 101 includes a plastic film or insulating paper. Exemplarily, the plastic film includes a PET (Polyethylene terephthalate) film or a PI film (Polyimide Film). Using the above solution, the first surface 105 and the second surface 106 of the electromagnetic shielding plate are respectively covered with a plastic film or insulating paper. Since the thickness of the plastic film or insulating paper is small, the space required in the first direction X is small. Therefore, in a limited installation space, the thickness of the electromagnetic shielding plate can be selected in a wide range, which can effectively improve the NVH (Noise, Vibration, and Harshness) performance of the electromagnetic shielding plate.

[0051] In some embodiments, the second insulating part 102 includes liquid silicone (LSR, Liquid Silicone Rubber), which is a colloidal substance made of silicon raw material, with excellent high temperature resistance, low temperature resistance, and chemical corrosion resistance, as well as excellent insulation performance and softness. On the one hand, covering the liquid silicone at positions such as the protrusion 104 and the via 103 where the plastic film cannot be pasted can meet the insulation withstand voltage requirements of the electromagnetic shielding plate 100; on the other hand, the liquid silicone becomes an elastomer after curing, and will not have problems such as cracks and insulation failure. In addition, the quality consistency of the liquid silicone during the manufacturing process is high and the process is simple, which is suitable for automated mass production.

[0052] In some embodiments, in some embodiments, see Figure 5 Combined with Figure 3 , the second insulating part 102 includes a first part 1021 and a second part 1022, the first part 1021 is provided in the via hole 103, the second part 1022 is provided in the convex part 104, and the first insulating part 101 is provided between the first surface 105, the first part 1021 and the second part 1022. Exemplarily, along the first direction X, the first part 1021 includes an upper part 10211, a middle part 10212 and a lower part 10213, the middle part 10212 covers the hole wall 1033 provided in the via hole 103 along the circumferential direction, the upper part 10211 is connected to the first insulating part 101 of the first surface 105, and the lower part 10213 is connected to the first insulating part 101 of the second surface 106. In this way, the liquid silicone can be connected to the metal material of the electromagnetic shielding plate 100 and the plastic material of the first insulating part 101 at the same time, and the advantage of the large bonding strength of the liquid silicone with metal and plastic can be fully utilized to improve the overall connection reliability.

[0053] In some embodiments, see Figure 2 , Figure 5 , Figure 6 , the convex part 104 includes an electrical connection part 1041, the electrical connection part 1041 is not provided with the first insulating part 101 and the second insulating part 102, and the second part 1022 covers the part of the convex part 104 that does not include the electrical connection part 1041. Exemplarily, the electrical connection part 1041 is in a circular ring shape, and the electrical connection part 1041 is used to ground the electromagnetic shielding plate 100, so no insulating medium is provided on the surface of the electrical connection part 1041. If the technical solution of forming a coating by powder spraying is adopted, it is necessary to set a shielding object before powder spraying, and the process is complicated and it is difficult to control that an insulating coating will not be formed on the electrical connection part 1041 during the powder spraying process, which affects the grounding effect; or the coating is formed by powder spraying as a whole, and then the coating at the electrical connection part 1041 is removed by laser or other methods, but this method is costly and easy to damage the electrical connection part 1041, resulting in it being unable to be grounded.

[0054] It is understandable that the present application does not limit the shape of the electrical connection portion 1041. For example, the electrical connection portion 1041 may also be other shapes such as a quadrilateral or a pentagon.

[0055] In some embodiments, see Figure 7 Combined with Figure 2 The electromagnetic shielding plate 100 includes a plurality of first vias 1031 and a plurality of second vias 1032, and both the first vias 1031 and the second vias 1032 are used for external components to pass through. Exemplarily, the electromagnetic shielding plate 100 includes three first vias 1031 and three second vias 1032, and the three first vias 1031 are arranged at intervals along the second direction Y on the electromagnetic shielding plate 100, and the three second vias 1032 are arranged at intervals along the second direction Y on the electromagnetic shielding plate 100, and each first via 1031 and each second via 1032 are arranged at intervals along the third direction Z on the electromagnetic shielding plate 100.

[0056] Exemplarily, the first via hole 1031 is a waist-shaped hole, and the second via hole 1032 is rectangular. Correspondingly, the first part 1021 of the second insulating part 102 may also be waist-shaped or rectangular, etc., and the present application does not limit the shape of the first part 1021 of the second insulating part 102. It can be understood that the first via hole 1031 and the second via hole 1032 may be rectangular, circular or other shapes, and the present application does not limit the size, shape, etc. of the first via hole 1031 and the second via hole 1032. For example, the number of the first via hole 1031 and the second via hole 1032 may also be 2, 5, 6, 8, 9 or the like. In addition, the electromagnetic shielding plate 100 provided in the present application may also include other via holes 103, and the number, shape and position of the via holes 103 may be set according to actual needs, and will not be listed here one by one.

[0057] In some embodiments, see Figure 2, the electromagnetic shielding plate 100 includes a plurality of first protrusions 1041, a plurality of second protrusions 1042, and a plurality of third protrusions 1043. Exemplarily, the electromagnetic shielding plate 100 includes two first protrusions 1041, two second protrusions 1042, and seven third protrusions 1043. The two first protrusions 1041 are arranged at intervals along the second direction Y on the electromagnetic shielding plate 100, the two second protrusions 1042 are arranged at intervals along the two directions on the electromagnetic shielding plate 100, each first protrusion 1041 and each second protrusion 1042 are arranged at intervals along the third direction Z on the electromagnetic shielding plate 100, and the seven third protrusions 1043 are arranged at intervals along the edge portion of the electromagnetic shielding plate 100. It can be understood that the present application does not limit the number and position of the first protrusion 1041, the second protrusion 1042, and the third protrusion 1043. For example, the first protrusion 1041, the second protrusion 1042, and the third protrusion 1043 may include 2, 3, 4, 5, 6, etc. numbers respectively.

[0058] In some embodiments, see Figure 7 , the electromagnetic shielding plate 100 includes a reinforcing portion 107 for improving the support strength of the electromagnetic shielding plate 100, the reinforcing portion 107 is convexly arranged on the second surface 106, and the surface of the reinforcing portion 107 is covered with a first insulating portion 101. In some embodiments, the electromagnetic shielding plate 100 includes a first reinforcing portion 1071, a second reinforcing portion 1072 and a third reinforcing portion 1073, the third reinforcing portion 1073 is arranged at intervals along the edge portion of the electromagnetic shielding plate 100, and is arranged around the electromagnetic shielding plate 100, along the third direction Z, the first reinforcing portion 1071 and the second reinforcing portion 1072 are arranged between the first through hole 1031 and the second through hole 1032. Exemplarily, the first reinforcing portion 1071 includes two parts arranged opposite to each other along the second direction Y, each part includes four first reinforcing ribs 10711, each first reinforcing rib 10711 is arranged in a long strip shape, the four first reinforcing ribs 10711 form a "cross" shape, and the four first reinforcing ribs 10711 are not connected to each other. The second reinforcing part 1072 includes two parts symmetrically arranged along the third direction Z, each part includes a second reinforcing rib 10721 arranged in a "mountain" shape, and the two second reinforcing ribs 10721 are connected. The third reinforcing part 1073 includes a plurality of third reinforcing ribs 10731, and the third reinforcing ribs 10731 are arranged in a long strip shape.

[0059] It can be understood that the present application does not limit the shape, position, etc. of the first reinforcing rib 10711, the second reinforcing rib 10721, and the third reinforcing rib 10731. For example, the first reinforcing rib 10711 can also be arranged in a "mountain" shape, and the second reinforcing rib 10721 can also be arranged in a long strip shape.

[0060] The present application also provides an electronic product, see Figure 8, at least including the electromagnetic shielding plate 100 in any of the aforementioned embodiments. Exemplarily, the electronic product includes an inverter, the inverter includes a power module 201 and a PCB board 202, along the first direction X, the electromagnetic shielding plate 100 is arranged between the power module 201 and the PCB board 202, and the pins and other components on the power module 201 can be electrically connected to the PCB board 202 through the vias 103 of the electromagnetic shielding plate 100.

[0061] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An electromagnetic shielding plate, characterized in that: include: at least one protrusion for grounding; A first insulating portion, the first insulating portion is an integrally formed structural member, and the first insulating portion is provided on a surface of the electromagnetic shielding plate excluding the protrusion; The second insulating part is arranged on the convex part, and a part of the second insulating part is connected to the first insulating part, and the first insulating part and the second insulating part do not include a powder coating.

2. The electromagnetic shielding plate according to claim 1, wherein: The first insulating part includes a plastic film or insulating paper.

3. The electromagnetic shielding plate according to claim 2, wherein: The plastic film includes a PET film or a PI film.

4. The electromagnetic shielding plate according to claim 1, wherein: The second insulating portion includes liquid silicone.

5. The electromagnetic shielding plate according to any one of claims 1 to 4, characterized in that: The electromagnetic shielding plate includes a first surface and a second surface that are opposite to each other along a first direction, the first insulating portion covers the first surface and the second surface, and the protrusion protrudes outward from the first surface along the first direction.

6. The electromagnetic shielding plate according to claim 5, characterized in that The convex portion includes an electrical connection portion, the electrical connection portion is not provided with the first insulating portion and the second insulating portion, and the second insulating portion covers a portion of the convex portion that does not include the electrical connection portion.

7. The electromagnetic shielding plate according to claim 5, characterized in that The electromagnetic shielding plate further comprises: at least one via hole, the via hole passing through the first surface and the second surface, the via hole and the convex portion being arranged at intervals, The second insulating portion includes a first portion and a second portion, the first portion is disposed at the via hole, and the second portion is disposed at the protrusion.

8. The electromagnetic shielding plate according to claim 7, wherein: Along the first direction, the first portion includes an upper portion, a middle portion and a lower portion, the middle portion circumferentially covers the hole wall of the via hole, the upper portion is connected to the first insulating portion of the first surface, and the lower portion is connected to the first insulating portion of the second surface.

9. The electromagnetic shielding plate according to claim 5, wherein: The electromagnetic shielding plate comprises a reinforcing portion for improving the supporting strength of the electromagnetic shielding plate. The reinforcing portion is protrudingly arranged on the second surface, and the surface of the reinforcing portion is covered with the first insulating portion.

10. An electronic product, characterized in that: It comprises the electromagnetic shielding plate as claimed in any one of claims 1 to 9.

11. The electronic product according to claim 10, characterized in that: The electronic product includes an inverter.

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