Electromagnetic radiation suppression structure and electronic equipment

Abstract

The utility model discloses an electromagnetic radiation suppression structure and an electronic device, the electromagnetic radiation suppression structure comprises a shielding metal foil and a wave-absorbing material layer, the wave-absorbing material layer is arranged on one side of the shielding metal foil, the area of the wave-absorbing material layer is larger than that of the shielding metal foil, and the wave-absorbing material layer is used for covering a radiation emitter; the shielding metal foil is used for being arranged on the side, away from the radiation emitter, of the wave-absorbing material layer. According to the technical scheme, part of electromagnetic wave radiation is absorbed through the wave-absorbing material layer and then converted into heat energy to be consumed, the other part of electromagnetic wave radiation is reflected back to the wave-absorbing material layer through the shielding metal foil, and the wave-absorbing material layer absorbs reflected electromagnetic radiation for the second time and converts the electromagnetic radiation into heat energy to be consumed. According to the electromagnetic radiation suppression structure, the thickness of the used wave-absorbing material layer is reduced, the heat dissipation performance of the electromagnetic radiation suppression structure is improved, the rectification cost of a product is reduced, the rectification period of the product is shortened, and the output efficiency of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of radiation suppression, in particular to an electromagnetic radiation suppression structure and electronic equipment. Background Art

[0002] With the advent of the 5G era, the operating frequency and integration of modern electronic devices are increasing day by day. Graphics card chips in electronic devices will generate electromagnetic radiation during operation. Since graphics card chips usually require a large amount of current and high-frequency oscillation to operate, the radiation intensity of graphics card chips will be relatively high. When the electromagnetic wave radiation of graphics card chips does not meet national standards, absorbing materials are generally used to completely cover the graphics card chips to reduce or eliminate the emitted electromagnetic waves. In addition, because the memory clock signal emitted by the graphics card chip is a high-frequency signal, in order to achieve the suppression effect, only absorbing materials with a thickness greater than 0.5mm can be used. However, too thick absorbing materials will cause poor heat dissipation of the graphics card chip, thereby reducing the performance of the graphics card. Another method is to use a shielding cover to completely cover the graphics card chip. The use of a shielding cover requires the layout of the electronic equipment to be modified to increase the shielding cover base. The structural design and operation are cumbersome, which will extend the product development cycle. Therefore, an electromagnetic radiation suppression structure with good heat dissipation performance and simple structure is required. Utility Model Content

[0003] The main purpose of the utility model is to provide an electromagnetic radiation suppression structure, aiming to solve the problems of poor heat dissipation and complex structure of the existing radiation suppression structure.

[0004] To achieve the above-mentioned purpose, the electromagnetic radiation suppression structure proposed by the utility model includes:

[0005] Shielding foil;

[0006] The absorbing material layer is arranged on one side of the shielding metal foil, the area of ​​the absorbing material layer is larger than the area of ​​the shielding metal foil, and the absorbing material layer is used to cover the radiation emitting body; the shielding metal foil is used to be arranged on the side of the absorbing material layer away from the radiation emitting body.

[0007] Optionally, the absorbing material layer and the shielding metal foil form a groove, the opening of the groove faces the side where the absorbing material layer is located, and the groove is used to place the radiation emitter; the opening of the groove is used to connect to the circuit board of the radiation emitter.

[0008] Optionally, the cross-sectional area of ​​the groove is greater than or equal to the cross-sectional area of ​​the radiation emitting body; the depth of the groove is greater than or equal to the radiation emitting body; or the depth of the groove is greater than or equal to the sum of the heights of the radiation emitting body and the components on top of it.

[0009] Optionally, the electromagnetic radiation suppression structure also includes a mounting hole, which passes through the shielding metal foil and the absorbing material layer, and is used for allowing components on the top of the radiation emitting body to pass through. The absorbing material layer is located around the mounting hole and is in contact with the exposed part of the radiation emitting body.

[0010] Optionally, the electromagnetic radiation suppression structure further includes a plurality of fixing holes, wherein the fixing holes penetrate the shielding metal foil and the wave-absorbing material layer; and the fixing holes are used to connect to an external fixing structure.

[0011] Optionally, a plurality of the fixing holes are located at four corners of the shielding metal foil and the absorbing material layer.

[0012] Optionally, the thickness of the shielding metal foil is in the range of 0.03 mm to 0.15 mm; the thickness of the absorbing material layer is in the range of 0.09 mm to 0.3 mm; and / or,

[0013] The absorbing material layer is made of one or more materials selected from ferrite absorbing material, metal micro-powder absorbing material, polycrystalline iron fiber absorbing material, nanometer absorbing material and absorbing structure composite material; and / or,

[0014] The shielding metal foil is made of any one of copper, aluminum and tin materials.

[0015] The utility model also provides an electronic device, comprising the electromagnetic radiation suppression structure as described above.

[0016] Optionally, the electronic device comprises a circuit board, the circuit board is used to mount the radiation emitter, and the radiation emitter is located between the absorbing material layer and the circuit board.

[0017] Optionally, the electronic device further comprises a heat sink, and the heat sink is located on a side of the shielding metal foil away from the absorbing material layer.

[0018] The technical solution of the utility model adopts a shielding metal foil and an absorbing material layer to be stacked and covered on the radiation emitting body, wherein the absorbing material layer is in direct contact with the radiation emitting body, the shielding metal foil is arranged on the side of the absorbing material layer away from the radiation emitting body, and the electromagnetic wave radiation is emitted from all directions of the radiation emitting body, and the absorbing material absorbs a part of the electromagnetic wave radiation and converts it into heat energy consumption, and the other part of the electromagnetic wave radiation is reflected back to the absorbing material layer through the shielding metal foil, and the absorbing material layer absorbs the reflected radiation electromagnetic for the second time and converts it into heat energy consumption. The electromagnetic radiation suppression structure can quickly suppress the electromagnetic wave radiation of the radiation emitting body, ensure that the electromagnetic wave radiation is within the requirements of the national standard, shorten the rectification time, and facilitate mass production; at the same time, because the shielding metal foil has the function of reflecting electromagnetic wave radiation, the absorbing material layer can play the role of secondary absorption of electromagnetic wave radiation; therefore, in the case of absorbing the same amount of electromagnetic wave radiation, the thickness of the absorbing material layer used in the electromagnetic radiation suppression structure is smaller, thereby improving the heat dissipation performance of the electromagnetic radiation suppression structure; because the structure of the electromagnetic radiation suppression structure is simple and easy to implement, the rectification cost of the product is reduced, the rectification cycle of the product is shortened, and the output efficiency of the product is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the electromagnetic radiation suppression structure of the utility model.

[0021] Figure 2 It is a structural schematic diagram of another embodiment of the electromagnetic radiation suppression structure of the utility model.

[0022] Figure 3 It is a schematic diagram of the exploded structure of another embodiment of the electromagnetic radiation suppression structure of the utility model.

[0023] Figure 4 It is a schematic top view of another embodiment of the electromagnetic radiation suppression structure of the utility model.

[0024] Description of Figure Numbers:

[0025] Label name Label name 1 Shielding foil 2 Absorbing material layer 3 Grooves 4 Mounting holes 5 Fixing holes 6 Radiation emitter 7 Components 8 Circuit Board 9 heat sink

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0030] The utility model provides an electromagnetic radiation suppression structure.

[0031] Reference Figures 1 to 4 In one embodiment of the utility model, the electromagnetic radiation suppression structure includes a shielding metal foil 1 and an absorbing material layer 2, the absorbing material layer 2 is arranged on one side of the shielding metal foil 1, the area of ​​the absorbing material layer 2 is larger than the area of ​​the shielding metal foil 1, and the absorbing material layer 2 is used to cover the radiation emitting body 6; the shielding metal foil 1 is used to be arranged on the side of the absorbing material layer 2 away from the radiation emitting body 6.

[0032] A shielding metal foil 1 and an absorbing material layer 2 are stacked and covered on a radiation emitting body 6, wherein the absorbing material layer 2 is in direct contact with the radiation emitting body 6, and the shielding metal foil 1 is arranged on a side of the absorbing material layer 2 away from the radiation emitting body 6. The radiation emitting body 6 emits electromagnetic wave radiation from all directions, and the absorbing material layer 2 absorbs a part of the electromagnetic wave radiation and converts it into heat energy consumption, while the other part of the electromagnetic wave radiation is reflected back to the absorbing material layer 2 through the shielding metal foil 1, and the absorbing material layer 2 absorbs the reflected electromagnetic radiation for a second time and converts it into heat energy consumption. The electromagnetic radiation suppression structure can quickly suppress the electromagnetic wave radiation of the radiation emitting body 6, ensure that the electromagnetic wave radiation of the final product is within the requirements of the national standard, shorten the product rectification time, and facilitate mass production; at the same time, since the shielding metal foil 1 has the function of reflecting electromagnetic wave radiation, the absorbing material layer 2 can play a secondary role in absorbing electromagnetic wave radiation; therefore, when absorbing the same amount of electromagnetic wave radiation, the thickness of the absorbing material layer 2 used in the electromagnetic radiation suppression structure is smaller, thereby improving the heat dissipation performance of the electromagnetic radiation suppression structure and avoiding poor heat dissipation leading to reduced product performance; since the electromagnetic radiation suppression structure has a simple structure and is easy to implement, it not only reduces the rectification cost of the product, shortens the rectification cycle of the product, but also improves the output efficiency of the product.

[0033] Optionally, the thickness of the shielding metal foil 1 is in the range of 0.03 mm to 0.15 mm; the thickness of the absorbing material layer 2 is in the range of 0.09 mm to 0.3 mm. The shielding metal foil 1 and the absorbing material layer 2 are matched to enable the absorbing material layer 2 to play the role of absorbing electromagnetic wave radiation twice; specifically, the thickness range of the shielding metal foil 1 is set to 0.03mm~0.15mm, and the shielding metal foil has the function of reflecting electromagnetic wave radiation, so that the thickness range of the absorbing material layer 2 can be reduced to 0.09mm~0.3mm; specifically, when the thickness of the shielding metal foil 1 is set to 0.05mm and the thickness of the absorbing material layer 2 is 0.1mm, the overall thickness of the electromagnetic radiation suppression structure is only 0.15mm, which greatly reduces the thickness of the electromagnetic radiation suppression structure, thereby improving the heat dissipation performance of the electromagnetic radiation suppression structure; when the radiation emitter 6 is a graphics card chip, the graphics card chip is installed on the circuit board 8 to form a graphics card, due to the excellent heat dissipation performance of the electromagnetic radiation suppression structure, it can avoid the graphics card from having poor heat dissipation due to the excessive thickness of the absorbing material layer 2, thereby avoiding the graphics card from overheating and causing performance degradation.

[0034] The electromagnetic radiation suppression structure is suitable for the rectification of products whose electromagnetic wave radiation does not meet the national standards. Since the thicker the absorbing material layer 2, the more expensive it is, by reducing the thickness of the absorbing material layer 2 in the electromagnetic radiation suppression structure, the rectification cost of the product can be reduced, thereby improving the market competitiveness of the product; at the same time, since the electromagnetic radiation suppression structure has a simple structure and is easy to implement, the rectification cycle of the product is greatly shortened.

[0035] Optionally, the absorbing material layer 2 and the shielding metal foil 1 form a groove 3, the opening of the groove 3 faces the side where the absorbing material layer 2 is located, and the groove 3 is used to place the radiation emitter 6; the opening of the groove 3 is used to connect to the circuit board 8 of the radiation emitter 6.

[0036] Specifically, the radiation emitter 6 is installed on the circuit board 8, the opening of the groove 3 is against the side surface of the circuit board 8, the radiation emitter 6 is located between the groove 3 and the circuit board 8, and the electromagnetic wave radiation of the radiation emitter 6 is absorbed by the absorbing material layer 2 and the shielding metal foil 1.

[0037] Optionally, the cross-sectional area of ​​the groove 3 is greater than or equal to the cross-sectional area of ​​the radiation emitting body 6; the depth of the groove 3 is greater than or equal to the radiation emitting body 6. In order to completely cover the radiation emitting body 6, the cross-sectional area of ​​the groove 3 needs to be greater than the cross-sectional area of ​​the radiation emitting body 6, and the depth of the groove 3 is greater than or equal to the radiation emitting body 6.

[0038] Optionally, the depth of the groove 3 is greater than or equal to the sum of the heights of the radiation emitting body 6 and the components 7 on its top. In addition, when other components 7 are arranged on the top of the radiation emitting body 6, the depth of the groove 3 needs to be greater than or equal to the sum of the heights of the radiation emitting body 6 and the components 7 on its top, so that the radiation emitting body 6 and the components 7 on its top can be covered together, so as to ensure that the electromagnetic radiation suppression structure has a better suppression effect on electromagnetic wave radiation.

[0039] Optionally, the electromagnetic radiation suppression structure further includes a mounting hole 4, the mounting hole 4 penetrates the shielding metal foil 1 and the absorbing material layer 2, the mounting hole 4 is used for the components 7 on the top of the radiation emitting body 6 to pass through, and the absorbing material layer 2 is located around the mounting hole 4 and fits with the exposed part of the radiation emitting body 6. If the components 7 on the top of the radiation emitting body 6 are not convenient to be shielded by the electromagnetic radiation suppression structure, the mounting hole 4 can be provided so that the components 7 on the top of the radiation emitting body 6 pass through the mounting hole 4 and are exposed, while the absorbing material layer 2 is located around the mounting hole 4 and still fits with the exposed part of the radiation emitting body 6, so as to ensure a good suppression effect on electromagnetic wave radiation, while not affecting the performance of the components 7.

[0040] Optionally, the electromagnetic radiation suppression structure further includes a plurality of fixing holes 5, the fixing holes 5 passing through the shielding metal foil 1 and the wave absorbing material layer 2; the fixing holes 5 are used to connect with an external fixing structure. By providing a plurality of fixing holes 5, screws can be passed through the fixing holes 5 and then threadedly connected with an external fixing structure, so as to avoid displacement of the electromagnetic radiation suppression structure, which affects the suppression of electromagnetic wave radiation; it should be noted that the external fixing structure can be the circuit board 8 of the radiation emitting body 6 mentioned above, or a mounting surface such as the inner wall of the shell.

[0041] Optionally, a plurality of the fixing holes 5 are located at the four corners of the shielding metal foil 1 and the absorbing material layer 2. Fixing the shielding metal foil 1 and the absorbing material layer 2 through four positioning holes can ensure a good fixing effect on the shielding metal foil 1 and the absorbing material layer 2, while avoiding affecting the structural strength of the electromagnetic radiation suppression structure due to a large number of fixing holes 5.

[0042] Optionally, the absorbing material layer 2 is made of one or more materials selected from ferrite absorbing materials, metal micro-powder absorbing materials, polycrystalline iron fiber absorbing materials, nano-absorbing materials and absorbing structure composite materials. The absorbing material layer 2 is made of one or more materials selected from ferrite absorbing materials, metal micro-powder absorbing materials, polycrystalline iron fiber absorbing materials, nano-absorbing materials and absorbing structure composite materials. The above materials can absorb and attenuate the electromagnetic wave energy incident from space, thereby reducing or eliminating the reflected electromagnetic wave radiation. For example, when the absorbing material layer 2 is made of ferrite absorbing materials, according to the law that electromagnetic waves propagate from low magnetic permeability to high magnetic permeability in the medium, the electromagnetic waves are guided by ferrite absorbing materials with high magnetic permeability, and after resonance, a large amount of radiation energy of the electromagnetic waves is absorbed, and then the energy of the electromagnetic waves is converted into heat energy through coupling.

[0043] Optionally, the shielding metal foil 1 is made of any one of copper, aluminum, and tin. Copper, aluminum, and tin have good ductility, and the shielding metal foil 1 formed has the characteristics of shielding, conductivity, and bendability and foldability, so that the thickness of the shielding metal foil 1 is controlled within a small range, and it is convenient to process and fold into various shapes. Among them, when electromagnetic wave radiation encounters obstacles on the surface of metals such as copper, aluminum, and tin, it will produce reflection and refraction phenomena, and return to the surface of the absorbing material layer 2, so that the absorbing material layer 2 can play a role in consuming and absorbing electromagnetic waves for the second time.

[0044] The technical solution of the utility model adopts a shielding metal foil 1 and an absorbing material layer 2 which are stacked and covered on a radiation emitting body 6, wherein the absorbing material layer 2 is in direct contact with the radiation emitting body 6, and the shielding metal foil 1 is arranged on a side of the absorbing material layer 2 away from the radiation emitting body 6. The radiation emitting body 6 emits electromagnetic wave radiation from all directions, and the absorbing material layer 2 absorbs a part of the electromagnetic wave radiation and converts it into heat energy consumption, while the other part of the electromagnetic wave radiation is reflected back to the absorbing material layer 2 through the shielding metal foil 1, and the absorbing material layer 2 absorbs the reflected electromagnetic radiation for a second time and converts it into heat energy consumption. The electromagnetic radiation suppression structure can quickly suppress the electromagnetic wave radiation of the radiation emitting body 6, ensure that the electromagnetic wave radiation of the final product is within the requirements of the national standard, shorten the product rectification time, and facilitate mass production; at the same time, since the shielding metal foil 1 has the function of reflecting electromagnetic wave radiation, the absorbing material layer 2 can play a secondary role in absorbing electromagnetic wave radiation; therefore, when absorbing the same amount of electromagnetic wave radiation, the thickness of the absorbing material layer 2 used in the electromagnetic radiation suppression structure is smaller, thereby improving the heat dissipation performance of the electromagnetic radiation suppression structure and avoiding poor heat dissipation leading to reduced product performance; since the electromagnetic radiation suppression structure has a simple structure and is easy to implement, it not only reduces the rectification cost of the product, shortens the rectification cycle of the product, but also improves the output efficiency of the product.

[0045] The utility model also proposes an electronic device, which includes an electromagnetic radiation suppression structure. The specific structure of the electromagnetic radiation suppression structure refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0046] Optionally, the electronic device includes a circuit board 8, the circuit board 8 is used to mount the radiation emitter 6, and the radiation emitter 6 is located between the absorbing material layer 2 and the circuit board 8. The radiation emitter 6 is located between the groove 3 and the circuit board 8, and the electromagnetic wave radiation of the radiation emitter 6 is absorbed by the absorbing material layer 2 and the shielding metal foil 1.

[0047] Optionally, the electronic device further comprises a heat sink 9, and the heat sink 9 is located on a side of the shielding metal foil 1 away from the absorbing material layer 2. The electronic device may be a high-speed serial computer expansion device, and the heat dissipation effect of the electronic device may be improved by allowing the electromagnetic radiation suppression structure to transfer heat to the heat sink 9.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electromagnetic radiation suppression structure, characterized in that: include: Shielding foil; An absorbing material layer, the absorbing material layer is arranged on one side of the shielding metal foil, the area of ​​the absorbing material layer is larger than the area of ​​the shielding metal foil, and the absorbing material layer is used to cover the radiation emitting body; the shielding metal foil is used to be arranged on the side of the absorbing material layer away from the radiation emitting body; The electromagnetic radiation suppression structure also includes a mounting hole, which passes through the shielding metal foil and the absorbing material layer. The mounting hole is used for allowing components on the top of the radiation emitting body to pass through. The absorbing material layer is located around the mounting hole and is in contact with the exposed part of the radiation emitting body.

2. The electromagnetic radiation suppression structure according to claim 1, characterized in that: The absorbing material layer and the shielding metal foil form a groove, the opening of the groove faces the side where the absorbing material layer is located, and the groove is used to place the radiation emitter; the opening of the groove is used to connect with the circuit board of the radiation emitter.

3. The electromagnetic radiation suppression structure according to claim 2, characterized in that: The cross-sectional area of ​​the groove is greater than or equal to the cross-sectional area of ​​the radiation emitting body; the depth of the groove is greater than or equal to the radiation emitting body; or the depth of the groove is greater than or equal to the sum of the heights of the radiation emitting body and the components on top of it.

4. The electromagnetic radiation suppression structure according to claim 3, characterized in that: The electromagnetic radiation suppression structure further comprises a plurality of fixing holes, wherein the fixing holes penetrate through the shielding metal foil and the wave absorbing material layer; and the fixing holes are used to be connected to an external fixing structure.

5. The electromagnetic radiation suppression structure according to claim 4, characterized in that: A plurality of the fixing holes are located at four corners of the shielding metal foil and the wave absorbing material layer.

6. The electromagnetic radiation suppression structure according to any one of claims 1 to 5, characterized in that: The thickness of the shielding metal foil is in the range of 0.03 mm to 0.15 mm; the thickness of the absorbing material layer is in the range of 0.09 mm to 0.3 mm; and / or, The absorbing material layer is made of one or more materials selected from ferrite absorbing material, metal micro-powder absorbing material, polycrystalline iron fiber absorbing material, nanometer absorbing material and absorbing structure composite material; and / or, The shielding metal foil is made of any one of copper, aluminum and tin materials.

7. An electronic device, characterized in that: Comprising the electromagnetic radiation suppression structure as claimed in any one of claims 1 to 6.

8. The electronic device according to claim 7, characterized in that: The electronic device comprises a circuit board, the circuit board is used for mounting the radiation emitter, and the radiation emitter is located between the wave absorbing material layer and the circuit board.

9. The electronic device according to claim 8, characterized in that: The electronic device further comprises a heat sink, and the heat sink is located on a side of the shielding metal foil away from the wave absorbing material layer.

Images