A circuit board shielding structure against electromagnetic interference

Abstract

The utility model relates to a kind of circuit board shielding structures of anti-electromagnetic interference, including mounting plate, shielding cover is equipped on the mounting plate, the end surface of the shielding cover is equipped with connecting plate, connecting plate is equipped with engaging piece on shielding cover, connecting plate is equipped with movable plate extending to the inside of shielding cover, the limiting assembly for being used to limit circuit board is equipped on the movable plate, the limiting assembly includes the two U-shaped covers of being oppositely arranged and being arranged on movable plate, the U-shaped cover is further equipped with abutment plate, spring is equipped between the abutment plate and U-shaped cover.The utility model is equipped with shielding cover cooperation mounting plate and connecting plate, can carry out all-round protection to circuit board, so that external electromagnetic is not easy to cause interference to circuit board, and by the limiting assembly set on movable plate, the fixing mode of circuit board becomes simple and convenient, without using any tool, circuit board can be easily taken out, effectively improve the convenience of later circuit board maintenance.

Description

Technical Field

[0001] This utility model relates to the field of circuit boards, specifically to a circuit board shielding structure that resists electromagnetic interference. Background Technology

[0002] Electromagnetic interference (EMI) is a prevalent problem in modern electronic devices. During operation, electronic devices not only generate EMI but are also susceptible to external electromagnetic influences, leading to performance degradation, signal distortion, and even malfunctions. Therefore, electromagnetic compatibility (EMC) has become an indispensable part of electronic device design.

[0003] To reduce the impact of electromagnetic interference on circuit boards, shielding covers are usually placed around them. Traditional shielding covers are mostly made of metal and are fixed to the circuit board by welding or bolts. However, when the circuit board needs maintenance or replacement, the shielding cover needs to be disassembled with tools to remove the circuit board inside. This undoubtedly makes the circuit board maintenance process cumbersome, complicated, time-consuming and labor-intensive. Utility Model Content

[0004] Based on the above description, this utility model provides a circuit board shielding structure for resisting electromagnetic interference, so as to solve the problem of the existing circuit board shielding structure for resisting electromagnetic interference.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A circuit board shielding structure for electromagnetic interference resistance includes a mounting plate, a shielding cover on the mounting plate, a connecting plate on the end face of the shielding cover, a locking member on the connecting plate and the shielding cover, a movable plate extending into the shielding cover on the connecting plate, and a limiting component for limiting the circuit board on the movable plate.

[0006] The limiting component includes two U-shaped covers disposed on the movable plate and arranged opposite each other. A stop plate is also provided inside the U-shaped cover, and a spring is provided between the stop plate and the U-shaped cover.

[0007] Furthermore, the shielding cover is an aluminum alloy shielding cover, the connecting plate is an aluminum alloy connecting plate, and the mounting plate is an aluminum alloy mounting plate.

[0008] Furthermore, the U-shaped cover has an opening on the side near the connecting plate, and the abutment has an inclined surface on the side near the connecting plate.

[0009] Furthermore, the movable plate is also provided with a slide rail, and the slide rail is provided with two sliders, and the two movable plates are respectively fixed to the corresponding sliders.

[0010] Furthermore, a bidirectional lead screw extending to the outside of the slide rail is installed inside the slide rail via a bearing. The two sliders are respectively threaded onto the surface of the bidirectional lead screw in different thread directions. A roller is also provided at the end of the bidirectional lead screw located outside the slide rail.

[0011] Furthermore, the inner wall of the shielding cover is also provided with a sliding groove, and the side of the movable plate is slidably connected to the inner wall of the sliding groove.

[0012] Furthermore, the movable plate is provided with an opening that penetrates the mounting plate, and the mounting plate is provided with a sealing plate that covers the outside of the opening. The sealing plate is also provided with multiple wire passage grooves.

[0013] Furthermore, the engaging component includes a buckle disposed on the side of the connecting plate, and the side of the shielding cover is provided with a locking block adapted to the buckle.

[0014] Furthermore, the shielding cover is also provided with a dustproof net on its side.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] This invention provides comprehensive protection for the circuit board through the shielding cover, mounting plate, and connecting plate, making it less susceptible to interference from external electromagnetic fields. Furthermore, the limiting components on the movable plate simplify the fixing of the circuit board, allowing it to be easily removed without any tools, thus significantly improving the convenience of future circuit board maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main body of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the shielding cover of this utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the slide rail of this utility model;

[0020] Figure 4 This is a schematic diagram of the U-shaped cover, spring, and stop plate of this utility model from another perspective;

[0021] Figure 5 This is a schematic diagram of the slide groove of this utility model;

[0022] Figure 6 This utility model Figure 2 Enlarged view of point A in the middle;

[0023] Figure 7 This is a schematic diagram of the sealing plate and the through groove of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Mounting plate; 2. Shielding cover; 3. Connecting plate; 4. Movable plate; 5. Slide rail; 6. U-shaped cover; 7. Spring; 8. Support plate; 9. Cable channel; 10. Slider; 11. Two-way lead screw; 12. Roller; 13. Sealing plate; 14. Slide groove; 15. Dustproof net; 16. Buckle; 17. Locking block. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0028] Please see Figure 1 , Figure 2 and Figure 4 The present invention provides an electromagnetic interference-resistant circuit board shielding structure, including a mounting plate 1, a shielding cover 2 integrally mounted on the mounting plate 1, a connecting plate 3 on the end face of the shielding cover 2, a snap-fit ​​component on the connecting plate 3 and the shielding cover 2, and a movable plate 4 integrally mounted on the connecting plate 3 extending into the shielding cover 2, and a limiting component on the movable plate 4 for limiting the circuit board.

[0029] The limiting component includes two U-shaped covers 6 disposed on the movable plate 4 and arranged opposite to each other. A stop plate 8 is also provided inside the U-shaped cover 6, and a spring 7 is provided between the stop plate 8 and the U-shaped cover 6.

[0030] One end of the spring 7 is fixed to the abutment plate 8, and the other end is fixed to the inner wall of the U-shaped cover 6.

[0031] Specifically, when the circuit board is inserted into the U-shaped cover 6, the spring 7 will undergo elastic deformation, which will give the abutment 8 a reaction force to cooperate with the inner wall of the U-shaped cover 6 to press against the circuit board, thereby completing the fixing of the circuit board.

[0032] In addition, the shielding cover 2 is an aluminum alloy shielding cover, the connecting plate 3 is an aluminum alloy connecting plate, and the mounting plate 1 is an aluminum alloy mounting plate. By using the shielding cover 2 in conjunction with the mounting plate 1 and the connecting plate 3, the circuit board can be protected in all directions, so that external electromagnetic interference is not easily caused to the circuit board. The materials of the shielding cover 2, the connecting plate 3 and the mounting plate 1 can also be adjusted according to the requirements. Only one feasible technical solution is provided here.

[0033] Please see Figure 3 and Figure 4 In this embodiment, the U-shaped cover 6 is open on the side near the connecting plate 3, and the abutment 8 is sloped on the side near the connecting plate 3.

[0034] The side of the abutment 8 closest to the connecting plate 3 is sloped to facilitate the insertion of the circuit board into the U-shaped cover 6.

[0035] Please see Figure 3 and Figure 5 In this embodiment, a slide rail 5 is also fixedly installed on the movable plate 4. Two sliders 10 are slidably installed inside the slide rail 5. The two movable plates 4 are fixed to the corresponding sliders 10 respectively. A bidirectional lead screw 11 extending to the outside of the slide rail 5 is installed inside the slide rail 5 through a bearing. The two sliders 10 are respectively threaded on different thread directions on the surface of the bidirectional lead screw 11. A roller 12 is also provided at one end of the bidirectional lead screw 11 located outside the slide rail 5.

[0036] Specifically, rotating the roller 12 causes the bidirectional lead screw 11 to rotate, which in turn allows the two sliders 10 to move in opposite or opposite directions, thereby adjusting the distance between the two U-shaped covers 6. This enables the device to limit the movement of circuit boards of different sizes, improving the applicability of the device.

[0037] In addition, the inner wall of the slide rail 5 can limit the slider 10, making it less prone to deflection, thereby ensuring the smooth movement of the U-shaped cover 6.

[0038] Please see Figure 5 In this embodiment, the inner wall of the shielding cover 2 is also provided with a sliding groove 14, and the side of the movable plate 4 is slidably connected to the inner wall of the sliding groove 14.

[0039] The sliding groove 14 is used to limit the movement of the movable plate 4, making it less prone to tilting, thereby ensuring the stability of the circuit board after it is fixed.

[0040] Please see Figure 7 In this embodiment, the movable plate 4 is also provided with an opening that penetrates the mounting plate 1. The mounting plate 1 is provided with a sealing plate 13, which covers the outside of the opening. The sealing plate 13 is also provided with multiple through grooves 9.

[0041] The sealing plate 13 is made of the same material as the mounting plate 1, and the sealing plate 13 is connected to the mounting plate 1 by bolts.

[0042] In addition, the wiring groove 9 and opening facilitate the connection of the circuit board to external electronic components.

[0043] Please see Figure 6 In this embodiment, the locking component includes a buckle 16 disposed on the side of the connecting plate 3, and a locking block 17 adapted to the buckle 16 is provided on the side of the shielding cover 2.

[0044] Specifically, the buckle 16 will deform to a certain extent when it comes into contact with the block 17, which facilitates the connection between the block 17 and the buckle 16. The buckle 16 and the block 17 make the connection between the connecting plate 3 and the shielding cover 2 simpler and more convenient, which facilitates the maintenance and replacement of the circuit board.

[0045] like Figure 1 As shown, in this embodiment, the side of the shielding cover 2 is also provided with a dustproof net 15.

[0046] By setting up the dustproof net 15, the air circulation inside the shielding cover 2 can be improved, which helps the circuit board dissipate heat. It can also prevent external dust from entering the shielding cover 2 and affecting the service life of the circuit board.

[0047] The above embodiment works as follows: The connecting plate 3 is moved away from the shielding cover 2 by the latch 16, allowing the movable plate 4 to be pulled out from inside the shielding cover 2. The roller 12 is rotated to rotate the bidirectional lead screw 11, allowing the two sliders 10 to move in opposite or opposing directions, thereby adjusting the distance between the two U-shaped covers 6. After adjusting the two U-shaped covers 6 to a suitable distance according to the size of the circuit board, the circuit board is directly inserted into the inside of the U-shaped cover 6. The spring force of the spring 7 allows the abutment plate 8 to press against the circuit board, thus fixing the circuit board. Then, the movable plate 4 is reinserted into the shielding cover 2, and the latch 16 and the locking block 17 are engaged.

[0048] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circuit board shielding structure for resisting electromagnetic interference, comprising a mounting plate (1), characterized in that: The mounting plate (1) is provided with a shielding cover (2), and the end face of the shielding cover (2) is provided with a connecting plate (3). The connecting plate (3) and the shielding cover (2) are provided with a snap-fit ​​component. The connecting plate (3) is provided with a movable plate (4) extending into the shielding cover (2). The movable plate (4) is provided with a limiting component for limiting the circuit board. The limiting component includes two U-shaped covers (6) disposed on the movable plate (4) and arranged opposite to each other. The U-shaped covers (6) are also provided with a stop plate (8), and a spring (7) is provided between the stop plate (8) and the U-shaped covers (6).

2. The electromagnetic interference-resistant circuit board shielding structure according to claim 1, characterized in that: The shielding cover (2) is an aluminum alloy shielding cover, the connecting plate (3) is an aluminum alloy connecting plate, and the mounting plate (1) is an aluminum alloy mounting plate.

3. The electromagnetic interference-resistant circuit board shielding structure according to claim 1, characterized in that: The U-shaped cover (6) has an opening on the side near the connecting plate (3), and the abutment (8) has an inclined surface on the side near the connecting plate (3).

4. The electromagnetic interference-resistant circuit board shielding structure according to claim 1, characterized in that: The movable plate (4) is also provided with a slide rail (5), and two sliders (10) are provided in the slide rail (5). The two movable plates (4) are respectively fixed to the corresponding sliders (10).

5. The electromagnetic interference-resistant circuit board shielding structure according to claim 4, characterized in that: The slide rail (5) is equipped with a bidirectional lead screw (11) extending to the outside of the slide rail (5) via a bearing. The two sliders (10) are respectively threaded on different thread directions on the surface of the bidirectional lead screw (11). The end of the bidirectional lead screw (11) located outside the slide rail (5) is also provided with a roller (12).

6. The electromagnetic interference-resistant circuit board shielding structure according to claim 1, characterized in that: The inner wall of the shield (2) is also provided with a sliding groove (14), and the side of the movable plate (4) is slidably connected to the inner wall of the sliding groove (14).

7. The electromagnetic interference-resistant circuit board shielding structure according to claim 1, characterized in that: The movable plate (4) is also provided with an opening that penetrates the mounting plate (1). The mounting plate (1) is provided with a sealing plate (13), which covers the outside of the opening. The sealing plate (13) is also provided with multiple through grooves (9).

8. The electromagnetic interference-resistant circuit board shielding structure according to claim 1, characterized in that: The fastening component includes a buckle (16) disposed on the side of the connecting plate (3), and the side of the shield (2) is provided with a buckle block (17) adapted to the buckle (16).

9. The electromagnetic interference-resistant circuit board shielding structure according to claim 1, characterized in that: The shield (2) is also provided with a dustproof net (15) on its side.

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