A circuit board shielding shell structure against electromagnetic interference

Abstract

The utility model discloses a kind of circuit board shielding shell structures of anti-electromagnetic interference, is related to circuit board electromagnetic interference technical field.One kind of circuit board shielding shell structure of anti-electromagnetic interference, including shell, shell is fixedly connected with high magnetic permeability metal layer, high electric conductivity metal layer and ferrite wave-absorbing material layer, high magnetic permeability metal layer is permalloy;The utility model is through the multilayer cooperation of high magnetic permeability metal layer (permalloy), high electric conductivity metal layer (copper), ferrite wave-absorbing material layer, realizes full-band electromagnetic interference protection, permalloy high-efficiency absorption, reflection low-frequency interference, copper layer strong shielding high-frequency interference, ferrite wave-absorbing material end absorption residual interference, three layers of relay make it difficult for external electromagnetic interference to invade, while inhibiting circuit board itself electromagnetic radiation exudation, create super-low interference clean operating environment for circuit board, guarantee electronic equipment signal transmission, circuit logic stable, improve equipment performance and reliability.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic interference protection technology for circuit boards, and more specifically, to a shielding shell structure for circuit boards that provides electromagnetic interference protection. Background Technology

[0002] During the operation of electronic devices, circuit boards, as core components, are susceptible to external electromagnetic interference and also generate electromagnetic radiation, affecting the normal operation of other devices and themselves. Traditional circuit board shielding shells mostly use a single metal material, which has limited shielding effect against electromagnetic interference of different frequencies. Low-frequency interference is easily penetrated, and high-frequency shielding is difficult to achieve comprehensively. Moreover, the shells have poor connection and adaptability, making it difficult to fit tightly when installing different circuit boards, resulting in gaps that lead to electromagnetic leakage. They cannot provide a stable and efficient electromagnetic protection environment for circuit boards, thus restricting the performance and stability of electronic devices. Therefore, there is an urgent need for a multi-layered shielding shell with strong structural adaptability to overcome the shortcomings of existing technologies. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an electromagnetic interference shielding shell structure for circuit boards that can overcome or at least partially solve the above problems.

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: a circuit board shielding shell structure for electromagnetic interference prevention, including a shell, on which a high permeability metal layer, a high conductivity metal layer and a ferrite absorbing material layer are fixedly connected. The high permeability metal layer is permalloy, which is used to absorb and reflect low-frequency electromagnetic interference from the outside; the high conductivity metal layer is copper, which is used to shield high-frequency electromagnetic interference; and the ferrite absorbing material layer is used to absorb residual electromagnetic interference that passes through the high permeability metal layer and the high conductivity metal layer.

[0005] Furthermore, a connecting strip is fixed on the housing, and the strip has a large slot and a small slot.

[0006] Furthermore, a slot is fixedly connected to the housing.

[0007] Furthermore, a baffle is provided on the housing, and a buckle is fixedly connected to the baffle, with the buckle corresponding to the buckle groove.

[0008] Furthermore, a rotating wheel is rotatably connected to the baffle, a threaded rod is fixedly connected to the rotating wheel, a threaded seat rod is threadedly connected to the threaded rod, bearing sleeves are provided at both ends of the threaded seat rod, and cross brackets are rotatably connected to the bearing sleeves.

[0009] Furthermore, a roller is rotatably connected to one end of the cross bracket, and a limit frame is fixedly connected to the baffle, with the roller rolling on the inner wall of the limit frame.

[0010] Furthermore, a rotating shaft is rotatably connected to the other end of the cross bracket, and a limit plate is provided on the cross bracket.

[0011] Furthermore, the rotating wheel, threaded rod, threaded seat rod, and cross bracket on the baffle constitute an adjustment mechanism. Rotating the rotating wheel causes the threaded rod to rotate, driving the threaded seat rod to move axially, which in turn drives the cross bracket to extend or retract. The roller at one end of the cross bracket rolls along the limiting frame to ensure stable deformation of the bracket. The rotating shaft at the other end cooperates with the limiting plate to limit the direction of bracket displacement. This mechanism can adjust the fit between the baffle and the housing and the adaptability of the internal space. When the circuit board is installed or the electromagnetic environment changes, the adjustment ensures that the shielding shell always tightly wraps the circuit board, optimizing the shielding effect. At the same time, it adapts to the installation of circuit boards of different sizes, improving the versatility of the structure and the reliability of the shielding.

[0012] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0013] 1. This utility model achieves full-band electromagnetic interference protection through the synergistic effect of multiple layers: a high-permeability metal layer (permalloy), a high-conductivity metal layer (copper), and a ferrite absorbing material layer. The permalloy efficiently absorbs and reflects low-frequency interference, the copper layer strongly shields high-frequency interference, and the ferrite absorbing material absorbs residual interference. The three layers work together to make it difficult for external electromagnetic interference to intrude, while suppressing the leakage of electromagnetic radiation from the circuit board itself. This creates an ultra-low interference clean operating environment for the circuit board, ensuring the stability of signal transmission and circuit logic in electronic equipment, and improving equipment performance and reliability.

[0014] 2. This utility model achieves quick and stable splicing through the shell clips and slots in conjunction with the baffle buckle. It is easy to install and the connection is tight, reducing electromagnetic leakage gaps. The baffle wheel-threaded rod-cross bracket adjustment mechanism can flexibly adjust the internal space and fit, adapting to the installation of circuit boards of different sizes. There is no need to replace the shell, reducing equipment production costs and maintenance difficulty. The same shielding shell can be reused in various scenarios and different circuit board configurations, enhancing the structural versatility.

[0015] 3. This utility model combines multi-layer shielding materials with mechanical structures. The metal layer provides dual protection of physical protection and electromagnetic shielding. The mechanical connection structure can be adjusted to ensure long-term stability and is not easy to loosen due to vibration, thermal expansion and contraction, etc., thus ensuring the long-term stability of shielding performance. Whether the equipment is operating for a long time in a complex electromagnetic environment (such as industrial sites or dense scenes with multiple electronic devices) or is subjected to temperature and external force changes, it can continuously protect the circuit board, reduce potential failures, extend the service life of electronic equipment, and improve the economy and practicality of the equipment throughout its entire life cycle.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the overall structure of a circuit board shielding shell structure for electromagnetic interference prevention proposed in this utility model.

[0019] Figure 2 This utility model proposes a circuit board shielding shell structure for preventing electromagnetic interference. Figure 1 Schematic diagram of the structure at point A;

[0020] Figure 3 This is a cross-sectional view of a circuit board shielding shell structure for electromagnetic interference protection proposed in this utility model.

[0021] Figure 4 This utility model proposes a circuit board shielding shell structure for preventing electromagnetic interference. Figure 3 Schematic diagram of the structure at point B;

[0022] Figure 5 This is a schematic diagram of the shell and baffle in the electromagnetic interference shielding shell structure for a circuit board proposed in this utility model;

[0023] Figure 6 This is a schematic diagram of the baffle and cross bracket in the electromagnetic interference shielding shell structure of the circuit board proposed in this utility model.

[0024] In the diagram: 1. Shell; 11. High permeability metal layer; 12. High conductivity metal layer; 13. Ferrite absorbing material layer; 14. Locking strip; 15. Large slot; 16. Small slot; 2. Slot; 3. Baffle; 31. Rotating wheel; 32. Threaded rod; 33. Threaded seat rod; 34. Cross bracket; 35. Roller; 36. Limiting frame; 37. Rotating shaft; 38. Limiting plate; 4. Buckle. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0026] Example: Refer to Figures 1-6 An electromagnetic interference shielding shell structure for a circuit board includes a shell 1. A high permeability metal layer 11, a high conductivity metal layer 12, and a ferrite absorbing material layer 13 are fixedly connected to the shell 1. The high permeability metal layer 11 is permalloy, used to absorb and reflect low-frequency electromagnetic interference from the outside. The high conductivity metal layer 12 is copper, used to shield high-frequency electromagnetic interference. The ferrite absorbing material layer 13 is used to absorb residual electromagnetic interference that passes through the high permeability metal layer 11 and the high conductivity metal layer 12.

[0027] A retaining strip 14 is fixedly connected to the housing 1, and the retaining strip 14 has a large slot 15 and a small slot 16.

[0028] The housing 1 is fixedly connected to the slot 2.

[0029] A baffle 3 is provided on the housing 1, and a buckle 4 is fixedly connected to the baffle 3, with the buckle 4 corresponding to the slot 2.

[0030] A rotating wheel 31 is rotatably connected to the baffle 3, a threaded rod 32 is fixedly connected to the rotating wheel 31, a threaded seat rod 33 is threadedly connected to the threaded rod 32, bearing sleeves are provided at both ends of the threaded seat rod 33, and a cross bracket 34 is rotatably connected to the bearing sleeves.

[0031] A roller 35 is rotatably connected to one end of the cross bracket 34, and a limit frame 36 is fixedly connected to the baffle 3. The roller 35 rolls on the inner wall of the limit frame 36.

[0032] A rotating shaft 37 is rotatably connected to the other end of the cross bracket 34, and a limit plate 38 is provided on the cross bracket 34.

[0033] The rotating wheel 31, threaded rod 32, threaded seat rod 33, and cross bracket 34 on the baffle 3 constitute an adjustment mechanism. Rotating the rotating wheel 31 causes the threaded rod 32 to rotate, driving the threaded seat rod 33 to move axially, which in turn drives the cross bracket 34 to extend or retract. The roller 35 at one end of the cross bracket 34 rolls along the limiting frame 36 to ensure stable deformation of the bracket. The rotating shaft 37 at the other end cooperates with the limiting plate 38 to limit the direction of bracket displacement. This mechanism can adjust the fit between the baffle 3 and the housing 1 and the adaptability of the internal space. When the circuit board is installed or the electromagnetic environment changes, the adjustment ensures that the shielding shell always tightly wraps the circuit board, optimizing the shielding effect. At the same time, it can adapt to the installation of circuit boards of different sizes, improving the versatility of the structure and the reliability of the shielding.

[0034] This invention utilizes a circuit board shielding shell to prevent electromagnetic interference. The core of the shell is the shell 1, which is composited with a high permeability metal layer 11, a high conductivity metal layer 12, and a ferrite absorbing material layer 13. When low-frequency electromagnetic interference occurs, the permalloy of the high permeability metal layer 11 absorbs and reflects the low-frequency interference due to its high magnetic permeability, cutting off its intrusion path. In the face of high-frequency electromagnetic interference, the copper of the high conductivity metal layer 12 uses its excellent conductivity to cancel and shield the high-frequency interference with induced current, building a high-frequency protection barrier. If residual interference still penetrates the first two layers, the ferrite absorbing material layer 13 can absorb and convert it, further purifying the electromagnetic environment and protecting the internal circuit board.

[0035] The clips 14, slots 2, and buckles 4 of the baffle 3 on the housing 1 enable quick adaptation and connection between the housing components. The large slot 15 and small slot 16 of the clip 14 can engage with the corresponding structure. The buckles 4 are embedded in the slots 2, allowing the housing 1 and the baffle 3 to be firmly spliced ​​together, providing stable structural support for the shielding layer to function, and ensuring the integrity and continuity of the shielding.

[0036] The rotating wheel 31, threaded rod 32, threaded seat rod 33, and cross bracket 34 on the baffle 3 constitute an adjustment mechanism. Rotating the rotating wheel 31 causes the threaded rod 32 to rotate, driving the threaded seat rod 33 to move axially, which in turn drives the cross bracket 34 to extend or retract. The roller 35 at one end of the cross bracket 34 rolls along the limiting frame 36 to ensure stable deformation of the bracket. The rotating shaft 37 at the other end cooperates with the limiting plate 38 to limit the direction of bracket displacement. This mechanism can adjust the fit between the baffle 3 and the housing 1 and the adaptability of the internal space. When the circuit board is installed or the electromagnetic environment changes, the adjustment ensures that the shielding shell always tightly wraps the circuit board, optimizing the shielding effect. At the same time, it can adapt to the installation of circuit boards of different sizes, improving the versatility of the structure and the reliability of the shielding.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A circuit board shielding shell structure for electromagnetic interference protection, characterized in that, Includes a housing (1), on which a high permeability metal layer (11), a high conductivity metal layer (12) and a ferrite absorbing material layer (13) are fixedly connected. The high permeability metal layer (11) is permalloy, which is used to absorb and reflect low-frequency electromagnetic interference from the outside. The high conductivity metal layer (12) is made of copper and is used to shield high frequency electromagnetic interference; The ferrite absorbing material layer (13) is used to absorb residual electromagnetic interference that passes through the high permeability metal layer (11) and the high conductivity metal layer (12).

2. The circuit board shielding shell structure for electromagnetic interference protection according to claim 1, characterized in that, A retaining strip (14) is fixedly connected to the housing (1), and the retaining strip (14) has a large slot (15) and a small slot (16).

3. The circuit board shielding shell structure for electromagnetic interference protection according to claim 1, characterized in that, A slot (2) is fixedly connected to the housing (1).

4. The circuit board shielding shell structure for electromagnetic interference protection according to claim 1, characterized in that, A baffle (3) is provided on the housing (1), and a buckle (4) is fixedly connected to the baffle (3), and the buckle (4) corresponds to the slot (2).

5. The circuit board shielding shell structure for electromagnetic interference protection according to claim 4, characterized in that, A rotating wheel (31) is rotatably connected to the baffle (3), a threaded rod (32) is fixedly connected to the rotating wheel (31), a threaded seat rod (33) is threadedly connected to the threaded rod (32), bearing sleeves are provided at both ends of the threaded seat rod (33), and a cross bracket (34) is rotatably connected to the bearing sleeve.

6. The circuit board shielding shell structure for electromagnetic interference protection according to claim 5, characterized in that, A roller (35) is rotatably connected to one end of the cross bracket (34), and a limit frame (36) is fixedly connected to the baffle (3), with the roller (35) rolling on the inner wall of the limit frame (36).

7. The circuit board shielding shell structure for electromagnetic interference protection according to claim 5, characterized in that, A rotating shaft (37) is rotatably connected to the other end of the cross bracket (34), and a limit plate (38) is provided on the cross bracket (34).

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