Multilayer nested high-frequency electromagnetic shielding device

Abstract

The utility model belongs to the technical field of electromagnetic shielding, particularly relates to a multilayer nested high-frequency electromagnetic shielding device, and aims to solve the problems that a single-layer box body of an existing device is extremely limited in high-frequency electromagnetic wave absorption capacity, a large amount of high-frequency electromagnetic interference is only simply reflected, the reflected electromagnetic waves are repeatedly refracted inside and outside the box body, and complex standing waves are formed. In order to solve the problems that the electromagnetic interference intensity in a box body cannot be effectively reduced and the complexity of an electromagnetic environment is aggravated, the utility model provides the following scheme: the multi-layer nested high-frequency electromagnetic shielding device comprises a shielding base, and an inner-layer shielding body, a middle-layer shielding body and an outer-layer shielding body are sequentially nested on the surface of the shielding base from inside to outside; the beneficial effects of the utility model are that the design of nesting in sequence from inside to outside enables each layer of shielding body to work cooperatively, weakens high-frequency electromagnetic interference layer by layer, and compared with a single-layer shielding structure, can cope with a complex high-frequency electromagnetic environment more comprehensively and efficiently, and significantly improves the shielding effect.

Description

Technical Field

[0001] This utility model relates to an electromagnetic shielding device, specifically a multi-layer nested high-frequency electromagnetic shielding device, belonging to the field of electromagnetic shielding technology. Background Technology

[0002] With the rapid development of electronic technology, various electronic devices generate high-frequency electromagnetic radiation when they are working. This radiation not only interferes with the normal operation of other electronic devices in the vicinity, but may also pose a potential hazard to human health. At the same time, in some places with extremely high requirements for the electromagnetic environment, such as medical equipment rooms, communication base stations, and electronic laboratories, effective electromagnetic shielding measures are needed to prevent external high-frequency electromagnetic interference from entering and affecting the precise operation of the equipment.

[0003] In the prior art, such as the electromagnetic shielding box disclosed in announcement number CN209017394U, the box cover can be operated semi-automatically, saving time and effort, improving work efficiency, and has the advantages of simple structure and low cost. However, the above-mentioned prior art solutions have the following shortcomings: The electromagnetic shielding box adopts a single-layer structure. The absorption capacity of a single-layer box for high-frequency electromagnetic waves is extremely limited. A large amount of high-frequency electromagnetic interference is simply reflected, and the reflected electromagnetic waves are repeatedly refracted inside and outside the box, forming a complex standing wave phenomenon. This not only fails to effectively reduce the intensity of electromagnetic interference inside the box, but also exacerbates the complexity of the electromagnetic environment. Utility Model Content

[0004] The purpose of this invention is to address the problem that the single-layer enclosure of the aforementioned device has extremely limited absorption capacity for high-frequency electromagnetic waves, resulting in a large amount of high-frequency electromagnetic interference being simply reflected. The reflected electromagnetic waves are repeatedly refracted inside and outside the enclosure, forming a complex standing wave phenomenon. This not only fails to effectively reduce the intensity of electromagnetic interference inside the enclosure but also exacerbates the complexity of the electromagnetic environment. Therefore, this invention provides a multi-layer nested high-frequency electromagnetic shielding device.

[0005] The present invention achieves the above objectives through the following technical solution: a multi-layer nested high-frequency electromagnetic shielding device, comprising a shielding base, wherein an inner shielding body, a middle shielding body, and an outer shielding body are nested sequentially from the inside to the outside on the surface of the shielding base.

[0006] As a further improvement of this utility model: the inner shield is made of a metal material with high magnetic permeability, and the surface of the inner shield is provided with multiple micropores evenly distributed.

[0007] As a further embodiment of this utility model: the middle layer shield is a metal wire mesh structure, the metal wire mesh is made of copper alloy material, the inner layer shield and the middle layer shield are connected by metal bolts, and there is a gap between the inner layer shield and the middle layer shield.

[0008] As a further improvement of this utility model: the outer shielding body is made of aluminum alloy metal plate, and the outer shielding body is connected to the middle shielding body by welding.

[0009] As a further improvement of this utility model: conductive shielding pads are provided at the contact points between the inner shielding body, the middle shielding body, and the outer shielding body and the shielding base, and the conductive shielding pads are installed on the surface of the shielding base.

[0010] As a further embodiment of this utility model: the outer shielding body is rotatably connected to the surface of the shielding base via a hinge. A pneumatic spring is hinged to the surface of the outer shielding body, and the other end of the pneumatic spring is hinged to the surface of the shielding base. A fixing plate is installed on the surface of the shielding base, and a locking screw is threadedly connected to the surface of the fixing plate. A wedge is rotatably connected to one end of the locking screw. A fixing block is installed on one side of the outer shielding body, and a wedge groove is opened on the surface of the fixing block. A T-shaped guide rod is slidably connected to the surface of the fixing plate, and one end of the T-shaped guide rod is connected to the wedge. A handle is fixedly installed on one side of the outer shielding body.

[0011] The beneficial effects of this utility model are:

[0012] This invention utilizes a combination of structures including a shielding base, an inner shielding layer, a middle shielding layer, an outer shielding layer, a conductive shielding pad, a handle, a wedge groove, a wedge block, and a T-shaped guide rod. The nested design, from the inside out, allows each shielding layer to work collaboratively, weakening high-frequency electromagnetic interference layer by layer. The inner shielding layer first attracts and guides magnetic lines of force and scatters electromagnetic waves; the middle shielding layer then reflects and absorbs them; and the outer shielding layer ultimately blocks leakage. Compared to a single-layer shielding structure, this design provides a more comprehensive and efficient response to complex high-frequency electromagnetic environments, significantly improving the shielding effect.

[0013] The conductive shielding pads installed at the contact points between the inner, middle, and outer shielding layers and the shielding base not only prevent electromagnetic leakage but also effectively block moisture and dust from entering the device through gaps, preventing damage to internal electronic components due to moisture or dust accumulation, extending the service life of the entire shielding device, and reducing maintenance frequency and costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the shielding base and conductive shielding pad in this utility model;

[0016] Figure 3 This is a schematic diagram of the inner shielding structure in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the middle layer shielding body in this utility model;

[0018] Figure 5 In this utility model Figure 1 A schematic diagram of the side view structure;

[0019] Figure 6 This is a schematic diagram of the structure of the T-shaped guide rod, wedge block, and fixing block in this utility model;

[0020] In the diagram: 1. Shielding base; 2. Inner shielding body; 3. Middle shielding body; 4. Outer shielding body; 5. Metal bolt; 6. Conductive shielding pad; 8. Pneumatic spring; 9. Handle; 10. Fixing block; 11. Wedge groove; 12. Fixing plate; 13. Locking screw; 14. Wedge block; 15. T-shaped guide rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] like Figures 1 to 6 As shown, a multi-layer nested high-frequency electromagnetic shielding device includes a shielding base 1, on the surface of which an inner shielding body 2, a middle shielding body 3 and an outer shielding body 4 are nested from the inside out.

[0023] The nested design from the inside out allows each layer of shielding to work together, weakening high-frequency electromagnetic interference layer by layer. The inner shielding 2 first attracts and guides magnetic lines of force and scatters electromagnetic waves, the middle shielding 3 then reflects and absorbs them, and the outer shielding 4 finally blocks leakage. Compared with a single-layer shielding structure, it can cope with complex high-frequency electromagnetic environments more comprehensively and efficiently, and significantly improve the shielding effect.

[0024] Furthermore, the inner shield 2 is made of a metal material with high magnetic permeability, and the surface of the inner shield 2 is provided with multiple micropores evenly distributed.

[0025] High-permeability metallic materials, such as permalloy and iron-silicon-aluminum alloy, are used. The high permeability allows the inner shield 2 to deeply attenuate the magnetic field component of high-frequency electromagnetic interference. When high-frequency electromagnetic waves are incident on the shield, the magnetic field part will generate an induced current in the shield. Due to the low magnetic reluctance of the high-permeability material, the reverse magnetic field generated by the induced current can more effectively cancel the original magnetic field, thereby achieving a deeper level of shielding against electromagnetic interference and greatly improving the durability and stability of the shielding effect. The uniformly distributed micropores form tiny scattering centers. When high-frequency electromagnetic waves propagate to the surface of the inner shield 2, they will be scattered when they encounter the micropores. This scattering effect breaks the original propagation law of electromagnetic waves, causing the electromagnetic waves to be reflected and attenuated multiple times in the shield, further reducing the intensity of electromagnetic interference entering the middle shield 3. Together with the high-permeability material, it significantly improves the initial shielding effect.

[0026] Furthermore, the middle layer shield 3 is a metal wire mesh structure, and the metal wire mesh is made of copper alloy material. The inner layer shield 2 and the middle layer shield 3 are connected by metal bolts 5, and there is a gap between the inner layer shield 2 and the middle layer shield 3.

[0027] The metal mesh made of copper alloy has good conductivity. When faced with residual high-frequency electromagnetic interference after the initial treatment by the inner shield 2, it can quickly guide the induced current to other parts. When electromagnetic waves encounter the metal mesh, some are reflected back by the metal wires at the edge of the mesh, changing their propagation direction. Some electromagnetic waves enter the mesh and are reflected and scattered multiple times within the mesh. They are absorbed by the copper alloy material and converted into heat energy and dissipated. This dual effect of reflection and absorption further weakens the intensity of electromagnetic interference and greatly improves the shielding effect against high-frequency electromagnetic interference.

[0028] Furthermore, the outer shield 4 is made of aluminum alloy metal plate, and the outer shield 4 is connected to the middle shield 3 by welding.

[0029] Aluminum alloy has excellent electrical conductivity. When residual high-frequency electromagnetic interference, after being treated by the inner shield 2 and the middle shield 3, reaches the outer shield 4, the aluminum alloy material can quickly induce a current. According to the principle of electromagnetic induction, these induced currents will generate a magnetic field opposite in direction to the original electromagnetic interference magnetic field. The two cancel each other out, effectively blocking the high-frequency electromagnetic interference from continuing to propagate into the external space, greatly enhancing the shielding effect of the entire shielding device. Welding, as a permanent connection method, allows the outer shield 4 and the middle shield 3 to be tightly combined into a whole. The continuous metal connection formed at the weld eliminates the gaps or gaps that may exist in traditional connection methods, effectively preventing electromagnetic interference from leaking through the connection. Example 2

[0030] Improvements based on Example 1:

[0031] Furthermore, conductive shielding pads 6 are provided at the contact points between the inner shielding body 2, the middle shielding body 3, and the outer shielding body 4 and the shielding base 1, and the conductive shielding pads 6 are installed on the surface of the shielding base 1.

[0032] The conductive shielding pad 6 can effectively block moisture and dust from entering the device through the gap between the shielding body and the shielding base 1. This not only prevents the internal electronic components from being damaged by moisture or dust accumulation, thus affecting the shielding performance, but also extends the service life of the entire shielding device and reduces the frequency and cost of maintenance.

[0033] Furthermore, the outer shield 4 is rotatably connected to the surface of the shield base 1 via a hinge. A pneumatic spring 8 is hinged to the surface of the outer shield 4, and the other end of the pneumatic spring 8 is hinged to the surface of the shield base 1. A fixing plate 12 is installed on the surface of the shield base 1. A locking screw 13 is threadedly connected to the surface of the fixing plate 12. A wedge block 14 is rotatably connected to one end of the locking screw 13. A fixing block 10 is installed on one side of the outer shield 4. A wedge groove 11 is opened on the surface of the fixing block 10. A T-shaped guide rod 15 is slidably connected to the surface of the fixing plate 12. One end of the T-shaped guide rod 15 is connected to the wedge block 14. A handle 9 is fixedly installed on one side of the outer shield 4.

[0034] The outer shield 4 is rotatably connected to the surface of the shielding base 1 via a hinge. A pneumatic spring 8, hinged to both the outer shield 4 and the shielding base 1, facilitates the opening and closing of the outer shield 4. When the operator pulls the handle 9 to open the outer shield 4, the pneumatic spring 8 provides auxiliary thrust, reducing the force required and making the opening process easier and smoother. This labor-saving design significantly reduces the operator's workload and improves operational efficiency. The pneumatic spring 8 has damping characteristics, allowing for precise control of the outer shield 4's movement speed and opening / closing angle during opening and closing, preventing collisions between the outer shield 4 and other components due to excessive opening / closing speed, thus avoiding equipment damage. 4. After closing, rotate the locking screw 13 to gradually insert the wedge 14 into the wedge groove 11. Due to the special shape design of the wedge 14 and the wedge groove 11, this connection method can generate greater friction and mechanical resistance, firmly locking the outer shield 4 onto the shielding base 1. This effectively prevents the outer shield 4 from accidentally opening due to external vibration, impact, or other factors during equipment operation, ensuring the structural integrity and stability of the shielding device in working condition. The tightly locked outer shield 4 and shielding base 1, together with the conductive shielding pad 6, can minimize electromagnetic leakage. This stable locking structure ensures a tight fit between the outer shield 4 and the shielding base 1, further improving the electromagnetic shielding performance of the entire shielding device.

[0035] Working principle: The operator holds the handle 9 and pulls it upward. With the assistance of the pneumatic spring 8, the outer shield 4 rotates upward around the hinge to open, making it convenient to place the experimental equipment to be shielded on the shielding base 1. The experimental equipment is placed stably on the shielding base 1, ensuring that the equipment is placed in a reasonable position and does not affect the normal closing of each shield and the electromagnetic shielding effect. The outer shield 4 is lowered and slowly descended until it contacts the shielding base 1. The locking screw 13 is rotated, which drives the wedge 14 to move towards the fixing block 10 until the wedge 14 is fully embedded in the wedge groove 11, thus achieving a firm lock on the outer shield 4. At this time, the entire multi-layer nested high-frequency electromagnetic shielding device is in the closed state and begins to play its shielding role.

[0036] The uniformly distributed micropores on the surface of the inner shield 2 reduce its weight while increasing the scattering of high-frequency electromagnetic waves. The gap between the middle shield 3 and the inner shield 2, together with the metal mesh structure, further reflects and absorbs the high-frequency electromagnetic interference that has been initially treated by the inner shield 2. The outer shield 4 then effectively blocks the remaining high-frequency electromagnetic interference from propagating into the external space. Conductive shielding pads 6 are installed at the contact points between the inner shield 2, the middle shield 3, and the outer shield 4 and the shielding base 1. The conductive shielding pads 6 are installed in the corresponding grooves on the surface of the shielding base 1 to ensure a tight fit and effectively prevent electromagnetic leakage. This effectively improves the shielding effect against high-frequency electromagnetic waves, adapts to complex electromagnetic environments, and provides reliable electromagnetic shielding protection for the normal operation of electronic equipment.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-layer nested high-frequency electromagnetic shielding device, characterized in that: It includes a shielding base (1), and the surface of the shielding base (1) is nested with an inner shielding body (2), a middle shielding body (3) and an outer shielding body (4) from the inside to the outside.

2. The multi-layer nested high-frequency electromagnetic shielding device according to claim 1, characterized in that: The inner shield (2) is made of a metal material with high magnetic permeability, and the surface of the inner shield (2) is provided with a plurality of uniformly distributed micropores.

3. The multi-layer nested high-frequency electromagnetic shielding device according to claim 1, characterized in that: The middle layer shield (3) is a metal wire mesh structure, and the metal wire mesh is made of copper alloy material. The inner layer shield (2) and the middle layer shield (3) are connected by metal bolts (5), and there is a gap between the inner layer shield (2) and the middle layer shield (3).

4. The multi-layer nested high-frequency electromagnetic shielding device according to claim 1, characterized in that: The outer shield (4) is made of aluminum alloy metal plate and is connected to the middle shield (3) by welding.

5. The multi-layer nested high-frequency electromagnetic shielding device according to claim 3, characterized in that: Conductive shielding pads (6) are provided at the contact points between the inner shielding body (2), the middle shielding body (3) and the outer shielding body (4) and the shielding base (1), and the conductive shielding pads (6) are installed on the surface of the shielding base (1).

6. The multi-layer nested high-frequency electromagnetic shielding device according to claim 1, characterized in that: The outer shield (4) is rotatably connected to the surface of the shield base (1) via a hinge. A pneumatic spring (8) is hinged to the surface of the outer shield (4). The other end of the pneumatic spring (8) is hinged to the surface of the shield base (1). A fixing plate (12) is installed on the surface of the shield base (1). A locking screw (13) is threaded onto the surface of the fixing plate (12). A wedge block (14) is rotatably connected to one end of the locking screw (13). A fixing block (10) is installed on one side of the outer shield (4). A wedge groove (11) is opened on the surface of the fixing block (10). A T-shaped guide rod (15) is slidably connected to the surface of the fixing plate (12). One end of the T-shaped guide rod (15) is connected to the wedge block (14). A handle (9) is fixedly installed on one side of the outer shield (4).

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