Electromagnetic shielding device

Abstract

The utility model discloses an electromagnetic shielding device relates to shielding device technical field, include: first casing, one side detachable connection has second casing, and first casing and second casing are spliced and are enclosed into a hollow and both ends open's through cavity, first half magnetic ring, and the middle part is fixed in first casing, second half magnetic ring, be fixed in second casing, and with first half magnetic ring opposite arrangement, the utility model discloses through setting up elastic member in the inner wall of first half magnetic ring or second half magnetic ring along its axial direction, and make the middle part of elastic member to the arch of the axial direction of shielding cavity, one end fixed connection in the inner wall and the other end is free end, when first half magnetic ring and second half magnetic ring splice, and the arching portion of elastic member first contact with cable and produce elastic deformation, thereby effectively buffering the impact force when splicing, avoid half magnetic ring to take place in the splicing process and knock the edge of collapse, have improved the assembly yield of magnetic ring and service life.

Description

Technical Field

[0001] This utility model relates to the technical field of shielding devices, specifically an electromagnetic shielding device. Background Technology

[0002] In electronic devices and communication systems, cables are susceptible to external electromagnetic interference during signal transmission and may also radiate electromagnetic waves, affecting the normal operation of other equipment. To suppress electromagnetic interference, electromagnetic shielding components such as magnetic rings are usually installed on the cables.

[0003] Existing electromagnetic shielding devices typically employ a split magnetic ring structure, consisting of two half-magnetic rings joined together and secured by an external shell. However, this structure presents several problems in practical applications: First, during assembly, the difficulty in precisely controlling the force applied during assembly can lead to collisions between the half-magnetic rings, causing edge chipping or damage, thus affecting the shielding effect and lifespan. Second, once the cable is placed inside the magnetic ring's inner hole, it comes into direct contact with the inner wall of the ring. Over time, vibration or pulling can cause friction, resulting in wear on the cable sheath or damage to the inner wall of the magnetic ring. Third, the tight fit between the cable and the inner wall of the magnetic ring makes it difficult for heat generated during operation to dissipate, easily causing the cable temperature to rise, affecting signal transmission quality and cable lifespan. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides an electromagnetic shielding device.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An electromagnetic shielding device, comprising:

[0007] The first housing has a second housing detachably connected to one side. The first housing and the second housing are joined together to form a hollow through cavity with openings at both ends.

[0008] The first half-magnetic ring is fixed in the middle of the first housing;

[0009] The second half-magnetic ring is fixed inside the second housing and is arranged opposite to the first half-magnetic ring. The first and second half-magnetic rings are joined to form a shielding cavity for placing cables; and

[0010] At least one elastic element is disposed on the inner wall of the first half magnetic ring or the second half magnetic ring along the axial direction of the first half magnetic ring;

[0011] The elastic element has a central part that arches towards the axis of the shielding cavity. One end of the elastic element is fixedly connected to the inner wall of the first half magnetic ring or the second half magnetic ring, and the other end is a free end.

[0012] When the first half-magnetic ring and the second half-magnetic ring are spliced ​​together, the elastic element is used to support the cable in the shielding cavity so that a gap is formed between the cable and at least part of the inner wall of the first half-magnetic ring or the second half-magnetic ring.

[0013] Preferably, the elastic element is provided in multiple ways, and the multiple elastic elements are arranged at intervals along the inner walls of the first half-magnetic ring and the second half-magnetic ring.

[0014] Preferred options also include:

[0015] Multiple through slots are formed on the inner walls of the openings at both ends of the first and second housings;

[0016] Multiple through slots are connected to the through cavity to form a heat dissipation channel in which the through cavity, the gap and the through slots are connected in sequence.

[0017] Preferably, the fixed end of the elastic element is disposed at one axial end of the inner wall of the first half magnetic ring or the second half magnetic ring, and the free end of the elastic element extends axially toward the other axial end of the inner wall.

[0018] Preferably, the first housing and the second housing are fixedly connected by fixing bolts.

[0019] Preferably, the arched portion of the elastic element and the inner wall of the first half-magnetic ring or the second half-magnetic ring form a deformation space, which is used to accommodate the elastic deformation of the arched portion of the elastic element when the cable squeezes the elastic element.

[0020] Preferably, the elastic element has a cuboid structure and is made of elastic rubber material.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] 1. This utility model provides an elastic element along the axial direction on the inner wall of the first or second half magnetic ring, with the middle part of the elastic element arched towards the axis of the shielding cavity, one end fixedly connected to the inner wall and the other end free. When the first and second half magnetic rings are spliced, the elastic element first contacts the cable and absorbs the impact energy during the splicing process through its elastic deformation, thereby avoiding damage to the cable due to instantaneous excessive compression. At the same time, it reduces the risk of edge chipping caused by the transmission of assembly stress to the end face of the half magnetic ring, thus effectively buffering the impact force during splicing, preventing the half magnetic ring from being bumped and chipped during the splicing process, and improving the assembly yield and service life of the magnetic ring.

[0023] 2. This utility model, by placing the elastic element between the cable and the inner wall of the semi-magnetic ring, and with the elastic element supported between the cable and the magnetic ring, avoids direct contact and friction between the cable and the inner wall of the magnetic ring, effectively reducing contact wear between the cable and the magnetic ring, protecting the cable sheath, avoiding damage to the inner wall of the magnetic ring, and ensuring the stability of electromagnetic shielding performance.

[0024] 3. This utility model uses an elastic element to support the cable and the magnetic ring, forming a heat dissipation gap between the cable and the inner wall of the semi-magnetic ring. This helps to dissipate the heat generated during the operation of the cable in a timely manner, avoids heat accumulation, and effectively improves the heat dissipation conditions of the cable. Attached Figure Description

[0025] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the electromagnetic shielding device of this utility model;

[0027] Figure 2 This is an exploded structural diagram of the electromagnetic shielding device of this utility model;

[0028] Figure 3 This utility model relates to an electromagnetic shielding device. Figure 1 Side view;

[0029] Figure 4 This is a three-dimensional structural schematic diagram of the first half-magnetic ring of the electromagnetic shielding device of this utility model.

[0030] Figure 5 This utility model relates to an electromagnetic shielding device. Figure 3 A schematic diagram of the AA cross-section of the three-dimensional structure;

[0031] Figure 6 This utility model relates to an electromagnetic shielding device. Figure 3 BB cross-sectional view;

[0032] Figure 7 This utility model relates to an electromagnetic shielding device. Figure 3 CC section view;

[0033] Figure 8 This is a schematic diagram of the cable shielding installation structure of the electromagnetic shielding device of this utility model.

[0034] The diagram is labeled as follows: 1. First housing; 2. Second housing; 3. First half magnetic ring; 4. Second half magnetic ring; 5. Through groove; 6. Elastic element; 7. Fixing bolt. Detailed Implementation

[0035] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0036] Example

[0037] like Figure 1-8 As shown, an electromagnetic shielding device includes a first housing 1, a second housing 2, a first half-magnetic ring 3, a second half-magnetic ring 4, a through groove 5, an elastic element 6, and a fixing bolt 7. The second housing 2 is detachably connected to one side of the first housing 1. In this embodiment, both the first housing 1 and the second housing 2 are semi-cylindrical structures, and when spliced ​​together, they form a complete cylindrical structure, with a hollow, open-end cavity inside. It is understood that the cavity is used for placing cables along its axial direction.

[0038] Furthermore, to achieve a detachable connection between the first housing 1 and the second housing 2, mounting holes are provided at the mating edges of the first housing 1 and the second housing 2. Fixing bolts 7 are placed in the mounting holes and tightened with nuts, thereby achieving a fixed connection between the first housing 1 and the second housing 2. As other embodiments of this utility model, the first housing 1 and the second housing 2 can also be fixed through detachable connection methods such as snap-fit ​​connections or hinged fastenings, all of which fall within the protection scope of this utility model.

[0039] Furthermore, such as Figure 5 As shown, the first half-magnetic ring 3 is fixed in the middle position inside the first housing 1. Specifically, the outer wall of the first half-magnetic ring 3 is adapted to the inner wall of the first housing 1, and the two can be bonded together with adhesive. To enhance the fixing effect, a positioning boss or a positioning groove can also be provided on the inner wall of the first housing 1, and a corresponding positioning groove or positioning boss is provided on the outer wall of the first half-magnetic ring 3. Through the interlocking of the positioning boss and the positioning groove, the first half-magnetic ring 3 is circumferentially and axially positioned within the first housing 1. Similarly, the second half-magnetic ring 4 is fixed inside the second housing 2, and its fixing method is the same as that of the first half-magnetic ring 3.

[0040] Furthermore, the first half-magnetic ring 3 and the second half-magnetic ring 4 are positioned opposite each other. When the first housing 1 and the second housing 2 are assembled, the first half-magnetic ring 3 and the second half-magnetic ring 4 are simultaneously assembled, forming a ring structure. The interior of this ring structure is the shielding cavity for placing the cable. The diameter of the shielding cavity is the same as the opening diameter of the through cavity to ensure that the cable can be smoothly placed into the shielding cavity. Both the first half-magnetic ring 3 and the second half-magnetic ring 4 are made of ferrite or other electromagnetic shielding materials, used to suppress electromagnetic interference for the cable placed in the shielding cavity.

[0041] Furthermore, the diameter of the shielding cavity is less than or equal to the opening diameter of the through cavity, so as to form a gap channel with the cable at the openings at both ends of the first housing 1 and the second housing 2, which facilitates heat dissipation of the cables inside the first housing 1 and the second housing 2.

[0042] Specifically, such as Figure 2 and Figure 4 As shown, the elastic element 6 is disposed on the inner wall of the first half-magnetic ring 3 or the second half-magnetic ring 4 along the axial direction of the first half-magnetic ring 3. In this embodiment, there is only one elastic element 6, which is disposed on the inner wall of the first half-magnetic ring 3. The elastic element 6 has a cuboid structure and is made of elastic rubber material, such as natural rubber, nitrile rubber, or silicone rubber. The middle part of the elastic element 6 arches towards the axis of the shielding cavity, that is, the elastic element 6 is generally bow-shaped or arc-shaped, and its arched part protrudes towards the interior of the shielding cavity. One end of the elastic element 6 is fixedly connected to the inner wall of the first half-magnetic ring 3, and the other end is a free end. The fixed end of the elastic element 6 can be bonded to the inner wall of the first half-magnetic ring 3 with adhesive, or integrally formed with the first half-magnetic ring 3 by vulcanization process.

[0043] Furthermore, a deformation space is formed between the arched portion of the elastic element 6 and the inner wall of the first half-magnetic ring 3. This deformation space accommodates the elastic deformation of the arched portion of the elastic element 6 when the cable is placed in the shielding cavity and compressed. Specifically, after the cable enters the shielding cavity, the outer wall of the cable contacts and applies pressure to the arched portion of the elastic element 6. Under the pressure, the arched portion undergoes elastic compression deformation towards the inner wall of the first half-magnetic ring 3. At this time, the arched portion moves towards the inner wall, and the deformation space provides accommodation for this movement, preventing the arched portion from being unable to deform sufficiently due to obstruction by the inner wall. This ensures that the elastic element 6 can perform its buffering and support functions effectively, and the free end of the elastic element 6 extends synchronously.

[0044] Furthermore, when the first half-magnetic ring 3 and the second half-magnetic ring 4 are joined, the elastic element 6 supports the cable. When the elastic element 6 is pressed against the inner wall of the first half-magnetic ring 3, it is positioned between the cable and the first half-magnetic ring 3, maintaining a certain distance between them—this distance is the heat dissipation gap. Similarly, if the elastic element 6 is located on the inner wall of the second half-magnetic ring 4, a heat dissipation gap is also formed between the cable and the inner wall of the second half-magnetic ring 4. This heat dissipation gap extends axially along the shielding cavity, providing space for the heat generated during cable operation.

[0045] Specifically, the fixed end of the elastic element 6 is located at one axial end of the inner wall of the first half-magnetic ring 3, and the free end of the elastic element 6 extends axially toward the other axial end of the inner wall of the first half-magnetic ring 3. That is, the elastic element 6 is arranged along the axial direction of the shielding cavity. This arrangement allows the elastic element 6 to have a long elastic deformation range in the axial direction, so that when the cable is subjected to axial vibration or tension, the elastic element 6 can provide protection over a long axial range.

[0046] Furthermore, when the first half-magnetic ring 3 and the second half-magnetic ring 4 are spliced, the arched portion of the elastic element 6 first contacts the cable. Under the splicing force, the first half-magnetic ring 3 and the second half-magnetic ring 4 gradually move closer together, and the arched portion of the elastic element 6 is gradually compressed by the cable. During this process, the splicing impact force is absorbed and buffered by the elastic deformation of the elastic element 6, thereby avoiding damage such as bumping and chipping caused by rigid contact between the first half-magnetic ring 3 and the second half-magnetic ring 4 during the splicing process.

[0047] Specifically, such as Figure 1 and Figure 2 As shown, the electromagnetic shielding device of this utility model also includes multiple through slots 5. These through slots 5 are formed on the inner walls of the openings at both ends of the first housing 1 and the second housing 2. Specifically, on the axial end faces of the first housing 1, through slots 5 are formed radially outward from the inner walls of the openings, and these through slots 5 penetrate the ends of the first housing 1 axially. Similarly, through slots 5 are also correspondingly formed on the axial end faces of the second housing 2. The multiple through slots 5 are spaced apart circumferentially around the housings, and are connected to the through cavity. After the first housing 1 and the second housing 2 are joined together, the through cavity, the heat dissipation gap, and the through slots 5 are sequentially connected, forming a heat dissipation channel.

[0048] Furthermore, outside air can enter the through cavity through slot 5, then flow into the heat dissipation gap, carrying away the heat generated by the cable after passing over its surface, and then flowing out to the external environment through slot 5 at the other end, forming a convection heat dissipation path. This heat dissipation channel significantly improves the airflow efficiency within the shielding cavity, effectively reducing the cable's operating temperature and ensuring signal transmission quality and cable lifespan.

[0049] Specifically, in this embodiment, the elastic element 6 is integrally molded from elastic rubber. Elastic rubber possesses excellent elasticity and wear resistance, effectively buffering the impact of splicing and maintaining good anti-wear performance during long-term cable use, reducing wear between the cable and the magnetic ring. Furthermore, the elastic rubber material has a certain coefficient of friction, which helps to prevent slippage and fix the cable, preventing axial movement within the shielding cavity.

[0050] Furthermore, since the elastic element 6 is made of elastic rubber, the height of its arched portion can be designed to different specifications according to actual needs, in order to adapt to the installation requirements of cables of different diameters. For cables of different diameters, the elastic element 6, through the varying degrees of elastic deformation of the arched portion, can maintain an appropriate heat dissipation gap between the cable and the inner wall of the magnetic ring, exhibiting good versatility and adaptability.

[0051] The installation process and usage method of this utility model will be described below in conjunction with the above structure.

[0052] Specifically, during installation, first remove the fixing bolts 7 to separate the first housing 1 from the second housing 2. At this time, the first half-magnetic ring 3 separates along with the first housing 1, and the second half-magnetic ring 4 separates along with the second housing 2. Then, place the cable to be shielded inside the first half-magnetic ring 3, so that the outer wall of the cable contacts the arched part of the elastic element 6 on the inner wall of the first half-magnetic ring 3.

[0053] Furthermore, the second housing 2 is aligned with the first housing 1, so that the second half-magnetic ring 4 and the first half-magnetic ring 3 are spliced ​​together. During the alignment process, the second half-magnetic ring 4 gradually moves closer to the first half-magnetic ring 3. If an elastic element 6 is also provided on the inner wall of the second half-magnetic ring 4, the arched part of the elastic element 6 will simultaneously contact the cable. During the splicing process, the splicing force applied by the operator is transmitted to the elastic element 6 through the cable. The arched part of the elastic element 6 undergoes elastic deformation, buffering and absorbing the splicing force, thereby preventing the first half-magnetic ring 3 and the second half-magnetic ring 4 from chipping or being damaged by impact due to rigid contact.

[0054] Furthermore, after the first housing 1 and the second housing 2 are fully aligned, the fixing bolts 7 are placed in the mounting holes of the first housing 1 and the second housing 2, and the nuts are tightened to fix the first housing 1 and the second housing 2 together. At this time, the cable is stably supported in the shielding cavity, the axis of the cable is consistent with the axis of the shielding cavity, and a heat dissipation gap is maintained between the outer wall of the cable and the inner wall of the semi-magnetic ring, and this heat dissipation gap is connected to the outside air through the through cavity and the through groove 5.

[0055] During equipment operation, heat is generated when the cable transmits signals. Because there is a heat dissipation gap between the cable and the inner wall of the magnetic ring, heat can dissipate from the cable surface into the air within the gap, and then be transferred to the through-cavity via convection and radiation, before being dissipated to the external environment of the shielding device through the through-slot 5. Simultaneously, the through-slot 5 connects to the through-cavity and the heat dissipation gap, forming a continuous airflow channel, which facilitates the entry of cool air and the exhaust of hot air, further improving heat dissipation efficiency.

[0056] As an optional implementation, multiple elastic elements 6 can be provided, and these multiple elastic elements 6 are arranged at intervals along the inner walls of the first half-magnetic ring 3 and the second half-magnetic ring 4. For example, two elastic elements 6 can be arranged at intervals along the circumference of the inner wall of the first half-magnetic ring 3, and two elastic elements 6 can be arranged at intervals along the circumference of the inner wall of the second half-magnetic ring 4, for a total of four elastic elements 6. The multiple elastic elements 6 together provide multi-point support for the cable, keeping the cable in a centered position within the shielding cavity and preventing the cable from shifting to one side, which would lead to uneven heat dissipation gaps. At the same time, multi-point support can further disperse the impact force during splicing, reduce local stress concentration, and better prevent the magnetic rings from chipping.

[0057] Alternatively, the elastic element 6 can adopt a wavy or sawtooth structure to increase the contact area between the elastic element 6 and the cable, thereby improving support stability and heat dissipation.

[0058] Buffering and protection effect: When the arched part of the elastic element 6 comes into contact with the cable first during splicing, it uses its elastic rubber material to undergo recoverable elastic deformation to absorb and buffer the impact force generated during the splicing of the first half magnetic ring 3 and the second half magnetic ring 4. This effectively avoids the first half magnetic ring 3 and the second half magnetic ring 4 from bumping, chipping or being damaged due to rigid contact, and significantly improves the assembly yield and product reliability.

[0059] High-efficiency heat dissipation: The cable is supported in the shielding cavity by the elastic element 6, so that a certain distance is maintained between the outer wall of the cable and the inner wall of the first half magnetic ring 3 or the second half magnetic ring 4, forming a heat dissipation gap extending along the axis. At the same time, combined with the through slots 5 opened at the ends of the first housing 1 and the second housing 2 and the through cavity, the three are connected in sequence to form a complete heat dissipation channel. Outside air can enter through the through slot 5, flow through the cable surface to carry away heat and then exit from the other end through slot 5, forming a convection heat dissipation path, which significantly improves the air circulation efficiency in the shielding cavity, effectively reduces the cable operating temperature, and ensures signal transmission quality and service life.

[0060] Wear-resistant and anti-slip fixing effect: The elastic element 6, made of elastic rubber, has excellent wear resistance and appropriate coefficient of friction. During long-term use of the cable, it can reduce the wear between the cable and the first half magnetic ring 3 or the second half magnetic ring 4, and also provide anti-slip fixing for the cable. This effectively prevents the cable from moving axially or vibrating and shifting within the shielding cavity, thus improving long-term stability and safety.

[0061] Axial vibration protection effect: By setting the fixed end of the elastic element 6 at one axial end of the inner wall of the first half magnetic ring 3 and the free end extending axially toward the other end, the elastic element 6 is arranged axially along the shielding cavity, and a longer elastic deformation section is obtained in the axial direction. When the cable is subjected to axial vibration or mechanical tension, the elastic element 6 can provide elastic buffering and support protection in a longer axial range, further enhancing the vibration resistance and cable holding force.

[0062] Multi-point balanced support effect (optional implementation): By circumferentially setting multiple elastic elements 6 on the inner walls of the first half magnetic ring 3 and the second half magnetic ring 4, the multiple elastic elements 6 together form multi-point support for the cable, so that the cable is kept in the center position in the shielding cavity, avoiding the cable from being biased to one side and causing uneven heat dissipation gap. At the same time, multi-point support can further disperse the impact force during splicing, reduce local stress concentration, better avoid the edge of the magnetic ring to break, and improve the overall support stability and heat dissipation uniformity.

[0063] Increased contact and heat dissipation area (optional implementation): By setting the elastic element 6 to a wave-shaped or sawtooth-shaped structure, the contact area between the elastic element 6 and the cable is effectively increased, which improves the support stability and increases the heat dissipation contact area. This facilitates the faster conduction of cable heat to the elastic element 6 and dissipation into the heat dissipation gap, further optimizing the heat dissipation effect and mechanical support performance.

[0064] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An electromagnetic shielding device, characterized in that, include: The first housing (1) has a second housing (2) detachably connected to one side. The first housing (1) and the second housing (2) are spliced ​​together to form a hollow through cavity with openings at both ends. The first half-magnetic ring (3) is fixed in the middle of the first housing (1); The second half-magnetic ring (4) is fixed inside the second housing (2) and is arranged opposite to the first half-magnetic ring (3). The first half-magnetic ring (3) and the second half-magnetic ring (4) are joined together to form a shielding cavity for placing cables; and At least one elastic element (6) is disposed on the inner wall of the first half magnetic ring (3) or the second half magnetic ring (4) along the axial direction of the first half magnetic ring (3); Among them, the middle part of the elastic element (6) arches towards the axis of the shielding cavity, one end of the elastic element (6) is fixedly connected to the inner wall of the first half magnetic ring (3) or the second half magnetic ring (4), and the other end is a free end; When the first half-magnetic ring (3) and the second half-magnetic ring (4) are spliced ​​together, the elastic element (6) is used to support the cable in the shielding cavity so that a gap is formed between the cable and at least part of the inner wall of the first half-magnetic ring (3) or the second half-magnetic ring (4).

2. The electromagnetic shielding device according to claim 1, characterized in that: The elastic element (6) is provided in multiple ways, and the multiple elastic elements (6) are arranged at intervals along the inner walls of the first half magnetic ring (3) and the second half magnetic ring (4).

3. An electromagnetic shielding device according to claim 2, characterized in that, Also includes: Multiple through slots (5) are formed on the inner walls of the openings at both ends of the first housing (1) and the second housing (2); Multiple through slots (5) are connected to the through cavity to form a heat dissipation channel in which the through cavity, the gap and the through slots (5) are connected in sequence.

4. An electromagnetic shielding device according to claim 3, characterized in that: The fixed end of the elastic element (6) is disposed on one axial end of the inner wall of the first half magnetic ring (3) or the second half magnetic ring (4), and the free end of the elastic element (6) extends axially toward the other axial end of the inner wall.

5. An electromagnetic shielding device according to claim 1, characterized in that: The first housing (1) and the second housing (2) are fixedly connected by fixing bolts (7).

6. An electromagnetic shielding device according to claim 5, characterized in that: The arched portion of the elastic element (6) forms a deformation space with the inner wall of the first half magnetic ring (3) or the second half magnetic ring (4). The deformation space is used to accommodate the elastic deformation of the arched portion of the elastic element (6) when the cable squeezes the elastic element (6).

7. An electromagnetic shielding device according to claim 6, characterized in that: The elastic element (6) has a cuboid structure and is made of elastic rubber.

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