Electromagnetic shielding protection device and circuit board assembly

Abstract

The application relates to the technical field of servers, and provides an electromagnetic shielding protection device and a circuit board assembly. The electromagnetic shielding protection device comprises a base, which is arranged on a circuit board body, and the circuit board body is provided with electronic elements to be shielded; a shielding cover, which is detachably arranged on the base and has at least two connecting positions with the base; and the base has a locked state and an unlocked state. In the locked state, the base keeps the shielding cover in a position covering at least part of the electronic elements to be shielded; and in the unlocked state, the base simultaneously releases the at least two connecting positions, so that the shielding cover can be separated from the base.

Description

Technical Field

[0001] This application relates to the field of server technology, and in particular to an electromagnetic shielding protection device and circuit board assembly. Background Technology

[0002] In fields such as servers, communication equipment, and industrial control, sensitive electronic modules on circuit boards (such as Baseboard Management Controllers, or BMC modules for short) typically require electromagnetic shielding to resist external interference and prevent their own radiation leakage. Currently, there are two main methods for fixing the shielding: one is to secure it with multiple screws, and the other is to use multiple elastic clips for fastening.

[0003] However, all of the above methods have obvious shortcomings. Screw fixing is cumbersome to install and remove, requiring tools to operate one by one, which is inefficient and easily damages the threaded holes; while elastic clips do not require tools, unlocking multiple clips is difficult to complete simultaneously, often requiring multiple people to cooperate or repeated pressing, which is inconvenient. In addition, disassembly requires manual prying to remove the shielding cover, which can easily cause deformation of the shielding cover and damage to the circuit board or the component to be shielded due to uneven force. Summary of the Invention

[0004] In view of the above-mentioned technical problems, this application provides an electromagnetic shielding protection device and circuit board assembly to at least solve the problem of inconvenience in operation in the related art.

[0005] This application provides an electromagnetic shielding protection device, comprising: a base disposed on a circuit board body having an electronic component to be shielded; a shielding cover detachably disposed on the base and having at least two connection positions with the base; the base having a locked state and an unlocked state: in the locked state, the base holds the shielding cover in a position covering at least a portion of the electronic component to be shielded; in the unlocked state, the base simultaneously releases at least two of the connection positions, so that the shielding cover can be separated from the base.

[0006] This application also provides a circuit board assembly, comprising: a circuit board body having at least one electronic component to be shielded; and an electromagnetic shielding device disposed on the circuit board body, covering at least a portion of the electronic component to be shielded.

[0007] In the aforementioned electromagnetic shielding protection device and circuit board assembly, the base and the shielding cover are separable through at least two connection points, and the base is configured to switch between a locked and unlocked state. When the base is locked, the shielding cover is reliably held in position covering the electronic components to be shielded; when disassembly is required, the base can release all the constraints on the connection points with the shielding cover at once, allowing the shielding cover to separate smoothly from the base. With this synchronous unlocking mechanism, users do not need to operate multiple fasteners one by one as in related technologies, nor do they need to repeatedly press the scattered clips; they only need to put the base into the unlocked state to release all locking relationships at once, thus simplifying the disassembly and assembly process. More importantly, since the shielding cover is completely released when the base is unlocked, the shielding cover is no longer constrained by any claws or screws, and users can directly remove it without applying additional prying force, thereby avoiding the risks of shielding cover deformation, circuit board damage, or component desoldering caused by prying. Attached Figure Description

[0008] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a perspective view of the electromagnetic shielding protection device according to an embodiment of this application, showing the circuit board body;

[0010] Figure 2 yes Figure 1 The diagram shows the electromagnetic shielding protection device in a locked state during use.

[0011] Figure 3 yes Figure 1 The diagram shows the electromagnetic shielding protection device in the unlocked state during use.

[0012] Figure 4 yes Figure 1 A perspective view of the base portion of the electromagnetic shielding protection device shown;

[0013] Figure 5 yes Figure 4 A partial enlarged view of part A of the electromagnetic shielding protection device shown;

[0014] Figure 6 yes Figure 4 A three-dimensional view of the base section from an upward angle;

[0015] Figure 7 yes Figure 1 A perspective view of the shielding cover of the electromagnetic shielding protection device from a bottom angle.

[0016] Figure 8 yes Figure 7 The diagram shows a top-view perspective of the shielding cover portion of the electromagnetic shielding protection device.

[0017] The above figures include the following reference numerals:

[0018] 100. Circuit board body; 110. Electronic components to be shielded;

[0019] 200. Shielding cover; 210. Second mating part; 220. First ventilation hole;

[0020] 300. Base; 310. Base plate; 311. Positioning block; 312. Mounting column; 320. First mating part; 321. Connecting section; 322. Pressing section; 323. Extension section; 324. Guide hole; 330. Pressing plate; 331. Ear; 340. First columnar component; 341. Limiting block; 350. Second columnar component; 360. First elastic component; 370. Limiting component; 380. Lever; 390. Lifting assembly; 391. Support; 392. Second elastic component; 393. Resistance end; 394. Power end;

[0021] 400, Ventilation assembly; 410, Shielding mesh; 420, Baffle; 421, Second ventilation hole; 430, First mounting base; 440, Second mounting base; 450, Temperature sensing actuator; 460, Fixing component; 470, Third elastic component;

[0022] 500. Heat dissipation component; 510. Heat conduction frame; 520. Heat conduction plate; 530. Fan; 540. Fins. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0024] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 This is a perspective view of an electromagnetic shielding protection device according to an embodiment of this application, showing the circuit board body. Figure 2 yes Figure 1 The diagram shows the electromagnetic shielding protection device in a locked state. Figure 3 yes Figure 1 The diagram shows the electromagnetic shielding protection device in the unlocked state.

[0027] This application provides an electromagnetic shielding protection device, referring to... Figures 1 to 3As shown, the circuit includes a base 300 and a shielding cover 200. The base 300 is disposed on a circuit board body 100, which has an electronic component 110 to be shielded. The shielding cover 200 is detachably disposed on the base 300 and has at least two connection positions with the base 300. The base 300 has a locked state and an unlocked state: in the locked state, the base 300 holds the shielding cover 200 in a position covering at least a portion of the electronic component 110 to be shielded; in the unlocked state, the base 300 simultaneously releases at least two connection positions, allowing the shielding cover 200 to be separated from the base 300.

[0028] In some illustrative embodiments, reference is made to Figures 1 to 3 As shown, the base 300 is disposed on the component side (also referred to as the main side) of the circuit board body 100. The circuit board body 100 includes, but is not limited to, the motherboard of a server, and the electronic components 110 to be shielded disposed thereon can specifically be a Baseboard Management Controller (BMC) module. Specifically, the BMC module, as the core control unit in the server responsible for hardware status monitoring, remote management, and fault alarms, is susceptible to external electromagnetic interference and generates electromagnetic radiation during operation. Therefore, it can be electromagnetically shielded by the aforementioned electromagnetic shielding protection device. It should be understood that the embodiments of this application are not limited to this.

[0029] For example, the aforementioned electromagnetic shielding protection device can also be applied to industrial control motherboards, communication base station core modules, control circuit boards of medical electronic equipment (such as monitors and ultrasound equipment), vehicle electronic control units, and other electronic equipment that require both electromagnetic shielding and convenient maintenance.

[0030] In some illustrative embodiments, see Figures 1 to 3 The shielding cover 200 is detachably mounted on the base 300, and there are at least two connection points between the shielding cover 200 and the base 300. The connection point can be understood as the part where the shielding cover 200 and the base 300 come into contact with each other and form a constraint. For example, it can be a part of the shielding cover 200 that is pressed, snapped, or hooked by the base 300, thereby fixing the shielding cover 200 to the base 300.

[0031] Reference Figure 2 and Figure 3 As shown, the base 300 is configured to have a locked state and an unlocked state. When the base 300 is in the locked state... Figure 2In the locked state, the base 300 holds the shielding cover 200 in a position that covers at least part of the electronic component 110 to be shielded; that is, the shielding cover 200 completely covers (or covers in at least one direction) the BMC module and other components to achieve electromagnetic shielding. In the unlocked state, the base 300 can simultaneously release the above-mentioned at least two connection positions, so that the shielding cover 200 can be separated from the base 300 without interference.

[0032] In this implementation, based on the synchronous unlocking mechanism of the base 300 and the shielding cover 200, the user does not need to operate multiple fasteners (such as screws) one by one as in related technologies, nor does the user need to repeatedly press the scattered clips. All locking relationships can be released at once simply by bringing the base 300 into the unlocked state, thus simplifying the assembly and disassembly process. More importantly, since the shielding cover 200 is completely released when the base 300 is unlocked, the shielding cover 200 is no longer constrained by any claws or screws. The user can directly remove it without applying additional prying force, thereby avoiding the risks of deformation of the shielding cover 200, damage to the circuit board, or component desoldering caused by prying.

[0033] According to the embodiments of this application, continue to refer to Figure 2 and Figure 3 As shown, the base 300 includes a base plate 310 and at least two first mating portions 320. The base plate 310 is disposed on the circuit board body 100. At least two first mating portions 320 are respectively disposed on opposite sides of the base plate 310, and at least one first mating portion 320 is configured to move between a locked position close to the other first mating portion 320 and an unlocked position away from the other first mating portion 320. Second mating portions 210 are respectively disposed on the opposite outer walls of the shielding cover 200. When the base 300 is in the locked state, at least two first mating portions 320 are in the locked position and each abuts against the end face of a second mating portion 210 away from the base plate 310, and the engagement portion of each first mating portion 320 and the second mating portion 210 forms a connection position. When the base 300 is in the unlocked state, at least two first mating portions 320 are in the unlocked position and each is separated from the second mating portion 210.

[0034] In some illustrative embodiments, reference is made to Figure 2 and Figure 3As shown, the base 300 includes a base plate 310 and at least two first mating portions 320. For ease of description, the length direction of the circuit board body 100 can be understood as the first direction, and its width direction as the second direction. Based on this, the two first mating portions 320 are disposed opposite each other on both sides of the base plate 310 along the second direction, and the main body of each first mating portion 320 extends along the first direction. Correspondingly, the shielding cover 200 has two second mating portions 210 on its two outer walls corresponding to the positions of the two first mating portions 320. Thus, a stable connection between the base 300 and the shielding cover 200 can be achieved through the connection of the first mating portions 320 and the corresponding second mating portions 210.

[0035] In some illustrative embodiments, reference is made to Figure 2 and Figure 3 As shown, the shielding cover 200 is configured as a generally cubic box structure with an open bottom, its internal space forming a shielding space for accommodating the electronic component 110 to be shielded. The shielding cover 200 is made of a material with electromagnetic shielding properties, such as stainless steel, copper alloy, aluminum alloy, or other metallic materials, or it may be made of non-metallic materials such as conductive plastic. Furthermore, to further enhance its electromagnetic shielding effectiveness, the inner and / or outer walls of the shielding cover 200 may be plated, for example, with a tin plating layer. This tin plating layer can effectively reflect and absorb electromagnetic signals, reduce electromagnetic leakage, and thus enhance the electromagnetic protection capability of the electronic component to be shielded (such as a BMC module).

[0036] Furthermore, a sealing ring can be fixedly connected to the bottom end of the shielding cover 200. This sealing ring may be made of conductive silicone rubber, among other things. In this way, the sealing ring made of conductive silicone rubber not only has good sealing performance, filling the gap between the shielding cover 200 and the circuit board body 100, but also has conductivity, enabling electrical connection between the shielding cover 200 and the circuit board body 100, thereby forming a complete electromagnetic shielding circuit and preventing electromagnetic signals from leaking from the gaps. At the same time, the conductive silicone rubber has a certain degree of elasticity, which can buffer the impact force during installation, protecting the shielding cover 200 and the circuit board body 100.

[0037] Furthermore, a positioning block 311 is provided at each of the four corners of the upper surface of the base plate 310. These positioning blocks 311 can be arranged at the four corners of the shielding cover 200, and their defined contours roughly match the outer contour of the lower part of the shielding cover 200. In this way, when the shielding cover 200 is installed onto the base 300, the positioning blocks 311 can provide auxiliary positioning for the shielding cover 200, so that the shielding cover 200 can be accurately placed on the outside of the electronic component 110 to be shielded, and when the base 300 is in the locked state, reliable electromagnetic shielding of the electronic component to be shielded is achieved.

[0038] Figure 4 yes Figure 1A perspective view of the base portion of the electromagnetic shielding protection device shown.

[0039] In some illustrative embodiments, reference is made to Figure 4 As shown, a base plate 310 is disposed on the component side of the circuit board body 100. Specifically, the base plate 310 includes, but is not limited to, a plate structure configured in a generally U-shape, sealed on three sides and open on one side. The opening formed by the base plate 310 includes, but is not limited to, facing a first direction (i.e., the length direction of the circuit board body 100), and the electronic components 110 to be shielded (such as the BMC module mentioned above) are located within the opening formed by the base plate 310. The bottom surface of the base plate 310 (including, but not limited to, the four corners of the bottom surface) is provided with downwardly extending mounting posts 312. These mounting posts 312 are inserted into preset positioning holes on the circuit board body 100 and locked from the back of the circuit board body 100 by screws, thereby firmly fixing the base plate 310 to the circuit board body 100.

[0040] In some illustrative embodiments, reference is made to Figures 2 to 4 As shown, two first mating portions 320 are respectively disposed on opposite sides of the base plate 310 (e.g., on opposite sides along the second direction). Each first mating portion 320 is generally plate-shaped and configured to move between a locked position close to the other first mating portion 320 and an unlocked position away from the other first mating portion 320, thereby adjusting the distance between the two first mating portions 320. Correspondingly, a second mating portion 210 is disposed on each of the opposite outer walls of the shield 200. When the shield 200 is placed on the base plate 310, the second mating portion 210 is located precisely between the first mating portion 320 and the base plate 310, and abuts tightly against the first mating portion 320.

[0041] Thus, when the base 300 is in the locked state (e.g.) Figure 2 As shown), the two first mating parts 320 are in a locked position close to each other, thus restricting the shield 200 between the two first mating parts 320 and engaging with the corresponding second mating part 210 (specifically described in the following embodiments) to form a connection position. When the base 300 is in the unlocked state (e.g. Figure 3 As shown), the first mating part 320 moves outward (or swings) to an unlocked position where they are far apart, thereby separating each first mating part 320 from the corresponding second mating part 210, and thus allowing the shield 200 to be freely removed from the base plate 310.

[0042] Figure 5 yes Figure 4 A partially enlarged view of part A of the electromagnetic shielding protection device shown.

[0043] According to the embodiments of this application, referring to Figure 4 and Figure 5 As shown, the first mating part 320 is configured as a plate-like structure including a connecting section 321 and a pressing section 322. The connecting section 321 is rotatably connected to the base plate 310. The pressing section 322 is disposed on the side of the connecting section 321 away from the base plate 310 and extends toward the opposite mating part. The second mating part 210 includes a protruding edge protruding from the outer wall of the shield 200.

[0044] According to the embodiments of this application, referring to Figure 4 and Figure 5 As shown, the first mating part 320 also includes an extension section 323. The extension section 323 is located on the side of the pressing section 322 away from the connecting section 321, and the extension section 323 has a guide hole 324. The guide hole 324 gradually extends obliquely from the top end towards the shielding cover 200. The base 300 also includes at least two levers 380, a pressing plate 330, and a first elastic member 360. At least two levers 380 are slidably disposed within a guide hole 324. The pressing plate 330 is vertically and vertically disposed on the base plate 310. Both ends of the pressing plate 330 are connected to at least two levers 380 respectively, and are configured to drive the levers 380 to slide along the guide hole 324, thereby driving the first mating part 320 to rotate between a locked position and an unlocked position. The first elastic element 360 is disposed between the pressing plate 330 and the base plate 310 and is configured to apply an elastic force to the pressing plate 330 to keep the first mating part 320 in the locked position.

[0045] According to the embodiments of this application, referring to Figure 4 and Figure 5 As shown, the base 300 also includes a first cylindrical member 340. One end of the first cylindrical member 340 is fixed to the base plate 310, and the other end of the first cylindrical member 340 passes through the pressing plate 330 and is slidably engaged with the pressing plate 330. A first elastic member 360 is sleeved on the outside of the first cylindrical member 340.

[0046] In some illustrative embodiments, reference is made to Figure 4 and Figure 5As shown, the first mating portion 320 includes, but is not limited to, being configured as a plate-like structure. Specifically, viewed in a cross-section parallel to the first direction (i.e., the length direction of the circuit board body 100), the connecting section 321 and the pressing section 322 of the first mating portion 320 form a generally L-shaped plate-like structure. The connecting section 321 is rotatably connected to the mounting base of the base plate 310 (e.g., via a hinge), allowing the first mating portion 320 to swing about its axis in a horizontal plane. The pressing section 322 may be integrally disposed on the side of the connecting section 321 away from the base plate 310 and extends toward the opposite first mating portion 320, for pressing against the second mating portion 210 of the shielding cover 200 when locked. Correspondingly, the second mating portion 210 includes, but is not limited to, being configured as a protruding edge protruding from the outer wall of the shielding cover 200, for example, a strip-shaped protrusion extending horizontally outward along the lower part of the side wall of the shielding cover 200.

[0047] Furthermore, the first mating part 320 also includes an extension section 323, which is disposed on the side of the pressing part 322 away from the connecting part 321, that is, at the outer end of the first mating part 320 away from the circuit board body 100. The extension section 323 has a guide hole 324 (which can also be a blind hole or a guide groove), which gradually extends at an angle from its top end toward the bottom end toward the shielding cover 200.

[0048] In some illustrative embodiments, reference is made to Figure 4 and Figure 5 As shown, the base 300 is also provided with at least two levers 380, a pressing plate 330, and a first elastic element 360. Each lever 380 extends along a first direction and is slidably disposed in a guide hole 324. One end of the lever 380 extends out of the guide hole 324 and is fixedly connected to the end of the pressing plate 330.

[0049] Furthermore, the pressing plate 330 is vertically and flexibly positioned above the base plate 310, with its two ends fixedly connected to two levers 380. When the user presses down on the pressing plate 330, the levers 380 slide along the inclined direction of the guide hole 324, driving the first mating part 320 to rotate outward (i.e., move from the locked position to the unlocked position). When the user releases the pressing plate 330, the elastic force provided by the first elastic element 360 causes the pressing plate 330 to rise, and the levers 380 slide in the opposite direction, causing the first mating part 320 to rotate inward and reset to the locked position. The first elastic element 360 applies an upward elastic force to the pressing plate 330, thereby keeping the first mating part 320 in the locked position.

[0050] In some illustrative embodiments, the base 300 further includes a first columnar member 340, which is a guide rod vertically fixed to the base plate 310. Specifically, the first columnar member 340 may be multiple (or one), for example, referring to... Figure 4 In the embodiment shown, which has two first columnar members 340, the two first columnar members 340 are spaced apart on both sides of the base plate 310 along the second direction (i.e., the width direction of the circuit board body 100). The lower end of each first columnar member 340 is fixedly connected to the base plate 310, and its upper end passes through the through hole of the pressing plate 330 and forms a sliding fit with the pressing plate 330, thereby guiding the pressing plate 330 to rise and fall smoothly.

[0051] Furthermore, the first elastic element 360 may include, but is not limited to, a compression spring. This first elastic element 360 can be sleeved on the outside of the first cylindrical element 340, with its upper end abutting against the lower surface of the pressing plate 330 and its lower end abutting against the upper surface of the base plate 310. In this way, an upward elastic restoring force can always be applied to the pressing plate 330. Of course, to make the elastic force applied by the first elastic element 360 act more evenly between the pressing plate 330 and the base plate 310, an annular gasket may also be provided between the end of the first elastic element 360 and the pressing plate 330 and / or the base plate 310. With the above structure, the user only needs to apply downward pressure (such as pressing down) to the pressing plate 330 to overcome the elastic force provided by the first elastic element 360, thereby simultaneously unlocking all the first mating parts 320. Conversely, when the user releases the pressing plate 330, the elastic force of the first elastic element 360 can cause both pressing plates 330 to automatically reset, thereby locking the shielding cover 200 again. Thus, a fast and synchronous disassembly and assembly operation is achieved. It should be understood that the embodiments of this application are not limited thereto.

[0052] For example, the second mating part 210 may also be a groove structure recessed into the inside of the shield 200.

[0053] For example, in addition to the above-described embodiment in which the first mating part 320 is rotatably connected to the base plate 310, it can also be slidably connected to the base plate 310. That is, the two first mating parts 320 can change their spacing by relative translation in order to press or release the second mating part 210.

[0054] According to the embodiments of this application, continue to refer to Figure 4As shown, the pressing plate 330 is provided with an ear 331, and the ear 331 has a first limiting hole. The base 300 also includes a second columnar member 350 and a limiting member 370. One end of the second columnar member 350 is fixed to the base plate 310, and the other end of the second columnar member 350 passes through the pressing plate 330 and slides with the pressing plate 330. The side wall of the second columnar member 350 has a second limiting hole. The limiting member 370 is detachably disposed between the first limiting hole and the second limiting hole to limit the displacement of the pressing plate 330 relative to the base plate 310.

[0055] In some illustrative embodiments, reference continues. Figure 4 As shown, the pressing plate 330 is provided with an ear 331, which has a first limiting hole. The base 300 also includes a second columnar member 350 and a limiting member 370. The second columnar member 350 includes, but is not limited to, a column configured as a vertically fixed post to the base plate 310, with its lower end fixedly connected to the base plate 310 and its upper end passing through the pressing plate 330 and slidingly engaging with the pressing plate 330, used to assist the first columnar member 340 in guiding the lifting and lowering movement of the pressing plate 330. Specifically, the second columnar member 350 can be spaced apart from the first columnar member 340 (i.e., the guide rod with the first elastic member 360) on the base plate 310, and together they provide a smooth lifting and lowering guide for the pressing plate 330. Among them, the first columnar member 340 is mainly used to undertake the guiding and elastic support functions, while the second columnar member 350 focuses on providing a limiting and locking function.

[0056] Furthermore, the second columnar member 350 has a second limiting hole on its side wall, which includes, but is not limited to, a hole located in the upper middle part of the second columnar member 350. Correspondingly, a limiting member 370 (e.g., a pin or positioning bolt) is detachably inserted between the first and second limiting holes. When the limiting member 370 is inserted, the first and second limiting holes are aligned, and the limiting member 370 passes through both simultaneously, thereby locking the position of the pressing plate 330 relative to the base plate 310, preventing accidental lifting and lowering, and ensuring the stability of the locked state. With this structure, the operator can insert the limiting member 370 after completing the installation of the shielding cover 200 to enhance the reliability of the lock; when disassembly is required, only the limiting member 370 needs to be pulled out to perform subsequent pressing and unlocking operations.

[0057] Of course, in other embodiments, the functions of the first columnar member 340 and the second columnar member 350 can be integrated, such as by providing a compression spring over the second columnar member 350, or by providing a similar second limiting hole on the side wall of the first columnar member 340.

[0058] In some illustrative embodiments, reference continues. Figure 4As shown, a limiting block 341 is also provided on the upper part of the first cylindrical member 340. The limiting block 341 protrudes from the outer contour of the first cylindrical member 340 and is located above the second limiting hole. Specifically, the radial dimension of the limiting block 341 is larger than the diameter of the through hole on the pressing plate 330 through which the second cylindrical member 350 passes, in order to limit the maximum upward displacement of the pressing plate 330 and prevent the pressing plate 330 from accidentally dislodging from the top of the second cylindrical member 350 under the action of the first elastic member 360.

[0059] In this implementation, the aforementioned limiting member 370 and limiting block 341 together constitute a dual-limiting redundancy design for the pressing plate 330. The limiting member 370 serves as an active, detachable locking structure, used to lock the pressing plate 330 in a fixed position during operation, preventing accidental unlocking. The limiting block 341 is a passive, non-detachable mechanical stop structure, used to prevent the pressing plate 330 from overtraveling and dislodging when the limiting member 370 is pulled out and the pressing plate 330 is pressed or rebounds. Thus, their functions complement each other; the limiting member 370 ensures locking reliability, while the limiting block 341 provides force and ensures the safety of the pressing plate 330 during lifting and lowering movements. Even if the limiting member 370 is missing, the limiting block 341 can still prevent the pressing plate 330 from falling off, thereby improving the device's fault tolerance.

[0060] Figure 6 yes Figure 4 The base shown is a three-dimensional view taken from below.

[0061] According to the embodiments of this application, referring to Figure 5 and Figure 6 As shown, the electromagnetic shielding protection device also includes a lifting assembly 390. The lifting assembly 390 is configured to lift the second mating part 210 when the base 300 is in the unlocked state, so that the shielding cover 200 is away from the base plate 310.

[0062] According to the embodiments of this application, referring to Figure 5 and Figure 6 As shown, the lifting assembly 390 includes a support 391, a push rod, and a second elastic member 392. The support 391 is disposed on the base plate 310. The push rod is rotatably disposed on the support 391 and forms a lever structure with the support 391. The power end 394 of the push rod extends between the pressing plate 330 and the base plate 310, and the resistance end 393 of the push rod extends between the second mating part 210 and the base plate 310. The second elastic member 392 is disposed between the support 391 and the push rod and is configured to apply a spring force close to the base plate 310 to the resistance end 393 of the push rod.

[0063] According to the embodiments of this application, referring to Figure 5 and Figure 6As shown, the angle between the power end 394 and the resistance end 393 of the push rod is configured as an obtuse angle.

[0064] In some illustrative embodiments, reference is made to Figure 5 and Figure 6 As shown, the lifting assembly 390 is configured to lift the second mating part 210 when the base 300 is in the unlocked state, so that the shielding cover 200 is away from the base plate 310, thereby facilitating the operator to directly remove the shielding cover 200 and avoiding manual prying. Specifically, the lifting assembly 390 includes a support 391, a push rod, and a second elastic element 392. The support 391 is fixedly disposed on the base plate 310, specifically in the edge area of ​​the base plate 310. The push rod is rotatably mounted on the support 391 via a pivot, and together with the support 391, they form a lever mechanism. The joint portion of the push rod and the support 391 forms the fulcrum of the lever mechanism, and the push rod forms a power end 394 and a resistance end 393 on both sides of the fulcrum. The power end 394 can be understood as the end of the push rod driven by the pressing plate 330, and the resistance end 393 can be understood as the end of the push rod used to lift the second mating part 210 of the shielding cover 200.

[0065] Furthermore, the power end 394 and the resistance end 393 are located on both sides of the rotating shaft, with the power end 394 extending into the gap between the pressing plate 330 and the base plate 310 (i.e., below the pressing plate 330), and the resistance end 393 extending into the space between the second mating part 210 and the base plate 310 (i.e., directly below the second mating part 210).

[0066] Furthermore, a second elastic element 392 (specifically, an arc-shaped spring or torsion spring) is positioned between the support 391 and the push rod, applying a spring force towards the base plate 310 to the resistance end 393 of the push rod, keeping the resistance end 393 in a low position to avoid interference with the shielding cover 200. When the user presses down on the pressing plate 330 to a certain depth (e.g., continuing to press down after unlocking the first mating part 320), the lower surface of the pressing plate 330 contacts and presses down on the power end 394 of the push rod. Due to the downward pressure on the power end 394, the push rod rotates around the support 391, causing the resistance end 393 to lift upward, thereby lifting the second mating part 210 and pushing the entire shielding cover 200 upward away from the base plate 310. In this way, the obstruction caused by the electronic components on the base 300 and / or the circuit board body 100 when removing the shielding cover 200 can be avoided, making it easier for the user to remove the shielding cover 200.

[0067] In some illustrative embodiments, reference is made to Figure 5 and Figure 6As shown, the power end 394 and the resistance end 393 of the push rod form a certain angle, which includes, but is not limited to, being configured as an obtuse angle. Specifically, the push rod is bent as a whole, and the angle between the extension directions of the power end 394 and the resistance end 393 is greater than 90 degrees. In this way, when the power end 394 is pressed down to the same height, the obtuse angle structure allows the resistance end 393 to obtain a larger upward swing amplitude, thereby achieving a more significant lifting displacement; at the same time, the obtuse angle structure of the push rod can make the pressure transmission smoother, avoid stress concentration, and improve the mechanical life of the push rod. In addition, the obtuse angle design also facilitates smooth contact of the power end 394 during the descent of the pressing plate 330, avoiding jamming.

[0068] With the lifting component 390 mentioned above, once the base 300 is unlocked, the user only needs to continuously press down on the same pressing plate 330 to automatically complete the ejection of the shielding cover 200 without changing tools or manually prying it, thereby further improving the convenience and safety of disassembly.

[0069] Figure 7 yes Figure 1 The image shows a perspective view of the shielding cover of the electromagnetic shielding protection device from a low angle.

[0070] According to the embodiments of this application, referring to Figure 7 As shown, the shield 200 has a first ventilation hole 220 on its side wall to connect the internal space of the shield 200 with the external space. The protective device also includes a ventilation assembly 400, which is disposed on the shield 200 and configured to open or close the first ventilation hole 220 in response to temperature changes in the internal space.

[0071] According to the embodiments of this application, referring to Figure 7 As shown, the ventilation assembly 400 includes a baffle 420 and a temperature-sensing actuator 450. The baffle 420 is slidably disposed inside the shield 200 and has a second ventilation hole 421. The temperature-sensing actuator 450 is located in the internal space and connected to the baffle 420. The temperature-sensing actuator 450 is configured to drive the baffle 420 to slide so that the second ventilation hole 421 at least partially overlaps with the first ventilation hole 220 when the temperature of the internal space rises. The temperature-sensing actuator 450 is also configured to drive the baffle 420 to slide so that the second ventilation hole 421 is misaligned with the first ventilation hole 220 when the temperature of the internal space decreases.

[0072] According to the embodiments of this application, referring to Figure 7 As shown, the ventilation assembly 400 also includes a shielding mesh 410. The shielding mesh 410 covers the first ventilation opening 220.

[0073] In some illustrative embodiments, reference is made to Figure 7As shown, a first ventilation hole 220 is provided on the side wall of the shielding cover 200. Specifically, the first ventilation hole 220 can be a through-hole penetrating the side wall of the shielding cover 200, used to connect the internal space of the shielding cover 200 with the external atmospheric environment. The number of first ventilation holes 220 can be one or more sets; for example, one set of first ventilation holes 220 can be provided on each of the opposite side walls of the shielding cover 200, forming a convection path between the two sets of first ventilation holes 220. Furthermore, to prevent electromagnetic signals from leaking through the first ventilation holes 220, a shielding mesh 410 can be fixedly installed inside each first ventilation hole 220. This shielding mesh 410 can be made of metal or other materials with electromagnetic shielding effects and has dense pores, thereby allowing air to pass through while effectively blocking the propagation of electromagnetic waves.

[0074] In some illustrative embodiments, reference is made to Figure 7 As shown, the ventilation assembly 400 includes a baffle 420 and a temperature-sensing actuator 450. The baffle 420 is slidably disposed on the inner sidewall of the shield 200, and the baffle 420 has a second ventilation hole 421. The shape, size, and arrangement of the second ventilation hole 421 correspond to the first ventilation hole 220, that is, when the baffle 420 slides to a specific position, the second ventilation hole 421 can at least partially overlap with the first ventilation hole 220, thereby forming a through ventilation channel. The sliding direction of the baffle 420 is configured to move along the sidewall plane of the shield 200 (e.g., horizontal sliding), so that the second ventilation hole 421 can be aligned or misaligned with the first ventilation hole 220, thereby closing the ventilation channel.

[0075] According to the embodiments of this application, referring to Figure 7 As shown, the temperature-sensing actuator 450 includes a first metal sheet and a second metal sheet stacked together, with the coefficient of thermal expansion of the first metal sheet being greater than that of the second metal sheet. The temperature-sensing actuator 450 has a fixed end and a free end. The fixed end is fixed to the shielding cover 200, and the free end is connected to the end of the baffle 420. When the temperature of the internal space rises, the temperature-sensing actuator 450 bends towards one side of the second metal sheet to drive the baffle 420 to slide; when the temperature of the internal space decreases, the temperature-sensing actuator 450 returns to a straight state to drive the baffle 420 to slide in the opposite direction.

[0076] According to the embodiments of this application, referring to Figure 7 As shown, the ventilation assembly 400 also includes a third elastic member 470. The third elastic member 470 is disposed between the baffle 420 and the shield 200 along the sliding direction of the baffle 420, and is configured to apply an elastic force to the baffle 420 to misalign the second ventilation hole 421 with the first ventilation hole 220.

[0077] In some illustrative embodiments, reference is made to Figure 7As shown, the temperature-sensing actuator 450 includes, but is not limited to, a bimetallic strip structure, specifically comprising a first metal strip and a second metal strip stacked together, wherein the coefficient of thermal expansion of the first metal strip is configured to be greater than that of the second metal strip. That is, the first metal strip forms the active layer of the temperature-sensing actuator 450, and is made, but is not limited to, one of a manganese-nickel-copper alloy, a nickel-chromium-iron alloy, a nickel-manganese-iron alloy, and an iron-nickel-manganese alloy; while the second metal strip forms the passive layer of the temperature-sensing actuator 450, and is not limited to, made of an iron-nickel alloy.

[0078] When the temperature inside the shield 200 changes, the two metal sheets will bend and deform due to their different degrees of expansion. Specifically, when the temperature rises, the first metal sheet, which has a larger coefficient of thermal expansion, stretches more, forcing the entire sheet to bend towards the second metal sheet; when the temperature decreases, the bimetallic sheet gradually returns to a straight state. The temperature-sensing actuator 450 has a fixed end and a free end. The fixed end is fixed to the inner top wall of the shield 200 by a fixing member 460 (e.g., a top seat), and the free end is connected to the end of the baffle 420 (e.g., via a transmission rod). When the temperature of the internal space rises, the temperature-sensing actuator 450 bends towards the second metal sheet, pushing the baffle 420 to slide, causing the second ventilation hole 421 to at least partially overlap with the first ventilation hole 220, opening ventilation and heat dissipation; when the temperature of the internal space decreases, the temperature-sensing actuator 450 returns to a straight state, causing the baffle 420 to slide in the opposite direction, causing the second ventilation hole 421 to misalign with the first ventilation hole 220, closing the ventilation channel and restoring the integrity of the shield. It should be understood that the embodiments of this application are not limited thereto.

[0079] For example, the temperature-sensitive actuator 450 can also be made of shape memory metal that can undergo specific deformation based on temperature changes.

[0080] In some illustrative embodiments, reference is made to Figure 7 As shown, the inner wall of the shield 200 is fixedly provided with a first mounting base 430 and a second mounting base 440, which are located near the two ends of the baffle 420, respectively. Furthermore, on the inner wall of the shielding cover 200 A fastener 460 is also provided, which serves as a fixed support for one end of the baffle 420. The temperature-sensing drive 450 is disposed between the first mounting base 430 and one end of the baffle 420. Thus, when the free end of the temperature-sensing drive 450 bends or straightens as the temperature changes, it can effectively drive the baffle 420 to slide along the inner wall of the shield 200.

[0081] In some illustrative embodiments, reference is made to Figure 7As shown, a third elastic element 470 (specifically, a compression spring or sheet) is provided near the other end of the baffle 420 that is not connected to the temperature-sensing drive element 450. This third elastic element 470 is disposed between the baffle 420 and the second mounting base 440 along the sliding direction of the baffle 420. Specifically, one end of the third elastic element 470 abuts against the end of the baffle 420 (or the guide plate connected to the baffle 420), and the other end abuts against the second mounting base 440. The third elastic element 470 is configured to apply a spring force to the baffle 420 to keep the second ventilation hole 421 and the first ventilation hole 220 misaligned, thereby assisting the baffle 420 to return to the closed position.

[0082] When the temperature inside the shield 200 rises, the temperature-sensing actuator 450 undergoes the bending deformation described above, thereby overcoming the elastic force of the third elastic element 470 and pushing the baffle 420 to slide and open the ventilation. When the temperature drops, the temperature-sensing actuator 450 returns to its straight position, and the elastic force of the third elastic element 470 assists the baffle 420 to slide quickly in the opposite direction, closing the ventilation. Thus, through the coordinated operation of the temperature-sensing actuator 450 and the third elastic element 470, the ventilation assembly achieves temperature-adaptive automatic opening and closing control without the need for external energy or electronic control. Simultaneously, the first mounting base 430, the second mounting base 440, and the fixing element 460 provide stable support for the temperature-sensing actuator 450 and the third elastic element 470, ensuring the long-term reliable operation of the ventilation assembly.

[0083] Figure 8 yes Figure 7 The diagram shows a top-view perspective of the shielding cover portion of the electromagnetic shielding protection device.

[0084] According to the embodiments of this application, referring to Figure 8 As shown, the electromagnetic shielding protection device also includes a heat dissipation component 500. The heat dissipation component 500 is disposed on the outside of the shielding cover 200 and is used to conduct and dissipate the heat accumulated on the shielding cover 200 to reduce the internal temperature of the shielding cover and ensure the stable operation of the electronic components to be shielded (such as BMC modules).

[0085] In some illustrative embodiments, reference is made to Figure 7 and Figure 8As shown, the heat dissipation assembly 500 includes a heat-conducting frame 510, a heat-conducting plate 520, a fan 530, and multiple fins 540. The heat-conducting frame 510 is fixedly installed at the center of the upper end face of the shielding cover 200, and its lower surface is in close contact with the shielding cover 200 to ensure good heat conduction. The heat-conducting plate 520 is disposed inside the heat-conducting frame 510, and the lower surface of the heat-conducting plate 520 is in direct contact with the upper end face of the shielding cover 200 for rapid heat conduction from the shielding cover 200. Multiple fins 540 are evenly distributed on the upper end face of the heat-conducting plate 520. These fins 540 can be integrally formed with the heat-conducting plate 520 or fixedly connected to it to increase the heat dissipation area and promote heat dissipation into the surrounding air.

[0086] Furthermore, mounting posts are fixedly installed at the four corners of the upper surface of the heat-conducting frame 510. The fan 530 is fixed to these mounting posts with screws and is located directly above the fins 540. When the fan 530 is running, it generates forced airflow. The airflow flows over the surface of the fins 540, which can quickly remove the heat from the fins 540, thereby greatly improving the heat dissipation efficiency. When the fan 530 is not running, the fins 540 can also passively dissipate heat through natural convection outside the shield 200.

[0087] In this implementation, through the aforementioned heat dissipation component 500, the heat on the shielding cover 200 is conducted to the fins 540 via the heat-conducting plate 520, and then dissipated to the external environment by forced convection from the fan 530, achieving efficient heat dissipation. This heat dissipation component works in conjunction with the ventilation component. When the internal temperature is low, passive heat dissipation from the fins 540 alone is sufficient; when the temperature rises, the ventilation component automatically opens the ventilation holes, and the fan 530 starts, forming forced air cooling, thereby ensuring that the inside of the shielding cover is always within a suitable operating temperature range, effectively solving the technical problem of poor heat dissipation in electromagnetic shielding structures in related technologies.

[0088] Based on the overall concept, this application also provides a circuit board assembly, continuing with reference to... Figures 1 to 3 As shown, the circuit board assembly includes a circuit board body 100 and the electromagnetic shielding protection device described in any of the foregoing embodiments. The circuit board body 100 has at least one electronic component 110 to be shielded, such as a BMC module, radio frequency chip, or other electromagnetically sensitive circuit module on a server motherboard. The electromagnetic shielding protection device is fixed to the circuit board body 100, and its shielding cover 200 covers at least a portion of the electronic component 110 to be shielded, thereby providing an electromagnetic shielding environment for the sensitive component.

[0089] Specifically, the electromagnetic shielding device includes a base 300 disposed on the circuit board body 100 and a shielding cover 200 detachably mounted on the base 300, with at least two connection points between the base 300 and the shielding cover 200. The base 300 is configured to have a locked state and an unlocked state: in the locked state, the base 300 holds the shielding cover 200 in position covering the electronic component 110 to be shielded, ensuring the reliability of the shielding; in the unlocked state, the base 300 can simultaneously release all connection points, allowing the shielding cover 200 to be smoothly separated from the base 300.

[0090] With this synchronized unlocking mechanism, users no longer need to operate multiple fasteners one by one (e.g., loosen screws one by one) or repeatedly press scattered clips as in related technologies. They only need to unlock the base 300 (e.g., by operating a single press plate 330) to release all locking relationships at once, greatly simplifying the assembly and disassembly process. More importantly, since the shielding cover 200 is completely released when the base 300 is unlocked, it is no longer constrained by any claws or screws, allowing users to remove it directly without applying additional prying force. This avoids the risks of shielding cover 200 deformation, circuit board damage, or component desoldering caused by prying, significantly improving the convenience and safety of maintenance. This circuit board assembly can be widely used in servers, communication equipment, industrial control, medical electronics, and automotive electronics, and is particularly suitable for scenarios requiring frequent maintenance and high requirements for electromagnetic shielding and heat dissipation.

[0091] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An electromagnetic shielding protection device, characterized in that, include: A base (300) is disposed on a circuit board body (100), the circuit board body (100) having an electronic component (110) to be shielded. A shielding cover (200) is detachably disposed on the base (300) and has at least two connection points with the base (300); The base (300) has a locked state and an unlocked state: In the locked state, the base (300) holds the shield (200) in a position that covers at least a portion of the electronic component (110) to be shielded; In the unlocked state, the base (300) simultaneously releases at least two of the connection positions, so that the shield (200) can be separated from the base (300); The base (300) includes: A base plate (310) is disposed on the circuit board body (100). At least two first mating parts (320) are respectively disposed on opposite sides of the base plate (310), and at least one first mating part (320) is configured to move between a locked position close to the other first mating part (320) and an unlocked position away from the other first mating part (320). The first mating part (320) is configured as a plate-like structure, including: The connecting section (321) is rotatably connected to the base plate (310). The pressing section (322) is disposed on the side of the connecting section (321) away from the base plate (310) and extends toward the other first mating part (320); An extension section (323) is provided on the side of the pressing section (322) away from the connecting section (321). The extension section (323) is provided with a guide hole (324). The guide hole (324) extends gradually from the top end toward the direction close to the shield (200). The shield (200) has a second mating part (210) on each of its two opposite outer walls. When the base (300) is in the locked state, at least two of the first mating parts (320) are in the locked position and each abuts against the end face of a second mating part (210) away from the base plate (310), and the joint portion of each first mating part (320) and the second mating part (210) forms a connection position; When the base (300) is in the unlocked state, at least two of the first mating parts (320) are in the unlocked position and are each separated from the second mating part (210); The second mating part (210) includes a protruding edge protruding from the outer wall of the shield (200); The base (300) also includes: At least two levers (380), each of the levers (380) being slidably disposed within one of the guide holes (324); A pressing plate (330) is vertically mounted on the base plate (310). Both ends of the pressing plate (330) are connected to at least two levers (380) and are configured to drive the levers (380) to slide along the guide hole (324) to drive the first mating part (320) to rotate between the locked position and the unlocked position. A first elastic element (360) is disposed between the pressing plate (330) and the base plate (310) and is configured to apply an elastic force to the pressing plate (330) to hold the first mating part (320) in the locked position.

2. The protective device according to claim 1, characterized in that, The base (300) also includes: A first cylindrical member (340) has one end fixedly connected to the base plate (310) and the other end of the first cylindrical member (340) passes through the pressing plate (330) and slides in cooperation with the pressing plate (330); The first elastic element (360) is sleeved on the outside of the first cylindrical element (340).

3. The protective device according to claim 1, characterized in that, The pressing plate (330) is provided with an ear (331), and the ear (331) has a first limiting hole; The base (300) also includes: The second columnar member (350) has one end fixed to the base plate (310) and the other end of the second columnar member (350) passes through the pressing plate (330) and slides with the pressing plate (330). The side wall of the second columnar member (350) is provided with a second limiting hole. A limiting member (370) is detachably inserted between the first limiting hole and the second limiting hole to limit the displacement of the pressing plate (330) relative to the base plate (310).

4. The protective device according to claim 2 or 3, characterized in that, Also includes: The lifting assembly (390) is configured to lift the second mating part (210) when the base (300) is in the unlocked state, so that the shield (200) is away from the base plate (310).

5. The protective device according to claim 4, characterized in that, The lifting assembly (390) includes: Support (391) is provided on the base plate (310); A push rod is rotatably mounted on the support (391) and forms a lever structure with the support (391). The power end (394) of the push rod extends between the pressing plate (330) and the base plate (310), and the resistance end (393) of the push rod extends between the second mating part (210) and the base plate (310). The second elastic element (392) is disposed between the support (391) and the top rod and is configured to apply an elastic force close to the base plate (310) to the resistance end (393) of the top rod.

6. The protective device according to claim 5, characterized in that, The power end (394) and resistance end (393) of the push rod are on the side opposite to the second elastic member (392), and the included angle between the power end (394) and the resistance end (393) is configured as an obtuse angle.

7. The protective device according to claim 1, characterized in that, The shield (200) has a first ventilation hole (220) on its side wall to connect the internal space of the shield (200) with the external space; The protective device also includes: A ventilation assembly (400), disposed on the shield (200), is configured to open or close the first ventilation opening (220) in response to temperature changes in the interior space.

8. The protective device according to claim 7, characterized in that, The ventilation assembly (400) includes: A baffle (420) is slidably disposed on the inner side of the shield (200) and has a second ventilation hole (421). A temperature-sensing actuator (450) is located in the internal space and connected to the baffle (420). The temperature-sensing actuator (450) is configured to drive the baffle (420) to slide such that the second vent (421) at least partially overlaps with the first vent (220) when the temperature of the interior space rises; The temperature-sensing actuator (450) is also configured to drive the baffle (420) to slide so that the second vent (421) is misaligned with the first vent (220) when the temperature of the interior space decreases.

9. The protective device according to claim 8, characterized in that, The temperature-sensing drive (450) includes a first metal sheet and a second metal sheet stacked together, wherein the coefficient of thermal expansion of the first metal sheet is configured to be greater than that of the second metal sheet; The temperature-sensing drive (450) has a fixed end and a free end. The fixed end is fixed to the shield (200), and the free end is connected to the end of the baffle (420). When the temperature of the internal space rises, the temperature-sensing actuator (450) bends toward one side of the second metal sheet to drive the baffle (420) to slide; when the temperature of the internal space decreases, the temperature-sensing actuator (450) returns to a straight state to drive the baffle (420) to slide in the opposite direction.

10. The protective device according to claim 8, characterized in that, The ventilation assembly (400) also includes: The third elastic element (470) is disposed between the baffle (420) and the shield (200) along the sliding direction of the baffle (420), and is configured to apply an elastic force to the baffle (420) to cause the second ventilation hole (421) to be misaligned with the first ventilation hole (220).

11. The protective device according to claim 8, characterized in that, The ventilation assembly (400) also includes: A shielding mesh (410) covers the first ventilation hole (220).

12. A circuit board assembly, characterized in that, include: The circuit board body (100) has at least one electronic component (110) to be shielded. The electromagnetic shielding protection device as described in any one of claims 1 to 11 is disposed on the circuit board body (100) and covers at least a portion of the electronic component (110) to be shielded.

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