Electromagnetic pulse protection device and electronic equipment

Abstract

The invention relates to the field of protection devices, in particular to an electromagnetic pulse protection device and electronic equipment. The electromagnetic pulse protection device comprises a conductive shell, an inner conductor and a short circuit assembly. The conductive shell is provided with an input interface and an output interface, the input interface is connected with the end face of one side of the inner conductor, and the output interface is connected with the end face of the other side of the inner conductor; the short circuit assembly is electrically connected with the inner conductor, and the short circuit assembly is electrically connected with the conductive shell; the short-circuit assembly has preset input impedance, so that a preset signal can pass through the short-circuit assembly, and the electromagnetic pulse is attenuated; an annular groove is formed in the side face of the inner conductor so that compensation inductance can be formed in the position of the inner conductor. The electromagnetic pulse protection device provided by the invention has a narrow-band band-pass filtering function while realizing high-efficiency protection, can effectively filter out-of-band interference, improves the signal-to-noise ratio of a system in a complex electromagnetic environment, and does not need an additional filter assembly.

Description

Technical Field

[0001] This application relates to the field of protective devices, and in particular to an electromagnetic pulse protection device and electronic equipment. Background Technology

[0002] Electromagnetic pulses (EMPs) are high-intensity transient electromagnetic phenomena that can damage electronic equipment. Preventing EMP intrusion is crucial for ensuring the stable operation of communication systems.

[0003] Currently, transient protection technologies for radio frequency ports are mainly divided into two categories: one is the absorption / clamping mechanism based on semiconductor devices (such as transient voltage suppressors) or gas discharge tubes; the other is the reflection / discharge mechanism based on transmission line structures, such as traditional quarter-wavelength short circuits.

[0004] However, when traditional quarter-wavelength circuit breakers are applied to high-frequency broadband applications ranging from 2GHz to 6GHz, the abrupt size changes (step discontinuities) at the connection between the circuit breaker's inner conductor and the interface or jumper wire amplify local parasitic capacitance effects, causing a shift in the transmission line's characteristic impedance and resulting in severe impedance mismatch. This mismatch manifests as increased reflection loss, making it difficult to meet the ultra-low reflection requirements of below -20dB for high-performance communication systems. Summary of the Invention

[0005] The purpose of this application is to provide an electromagnetic pulse protection device and electronic device that can maintain stable characteristic impedance and extremely low reflection loss in a wide frequency band from 2 GHz to 6 GHz.

[0006] This application provides an electromagnetic pulse protection device, including a conductive shell, an inner conductor, and a short-circuit component; The conductive shell is provided with an input interface and an output interface. The input interface is connected to one end face of the inner conductor, and the output interface is connected to the other end face of the inner conductor. The short-circuit component is electrically connected to the inner conductor and to the conductive shell; the short-circuit component has a preset input impedance to allow a preset signal to pass through and to attenuate electromagnetic pulses. The inner conductor has an annular groove on its side to form a compensating inductance at the inner conductor.

[0007] In the above technical solution, further, along the length direction of the inner conductor, the short-circuit component is connected to the middle part of the inner conductor, and on both sides of the short-circuit component, the inner conductor is provided with the annular groove.

[0008] In the above technical solution, a mounting portion is further provided in the middle of the inner conductor, and the short-circuit component is connected to the mounting portion; The inner conductor has connecting parts at both ends, and the two connecting parts are respectively connected to the input interface and the output interface; A slotted portion is provided between the mounting portion and the two connecting portions, and the slotted portion has the annular groove. The mounting part, the slotted part, and the connecting part are arranged coaxially.

[0009] In the above technical solution, the diameter of the mounting part is larger than the diameter of the connecting part; a first groove wall is formed between the mounting part and the slotted part to form the annular groove, and a second groove wall is formed between the connecting part and the slotted part to form the annular groove, wherein the height of the first groove wall is greater than the height of the second groove wall.

[0010] In the above technical solution, the short-circuit component further includes a shorting wire and a grounding block; One end of the shorting wire is connected to the middle of the inner conductor, and the other end of the shorting wire is connected to the grounding block; the grounding block is connected to the conductive shell. The length of the jumper wire is one-quarter of the wavelength corresponding to the center frequency of the operating frequency band.

[0011] In the above technical solution, the conductive shell further includes a shell body, a protective cap, and two interface components; The shell body is provided with a receiving cavity, a first opening and two second openings, and the first opening and the two second openings are all in communication with the receiving cavity; The two second openings are arranged opposite to each other, the inner conductor is located in the receiving cavity, and the two ends of the inner conductor are respectively located at the two second openings; the two interface components are respectively connected to the two second openings to form the input interface and the output interface, and the interface components are electrically connected to the inner conductor; The first opening is opposite to the middle of the inner conductor, the short wire is located at the first opening, the protective cap is connected to the first opening, and the grounding block is installed inside the protective cap.

[0012] In the above technical solution, the interface component further includes an interface element, an insulating fixing element, and a conductive terminal; The interface component is connected to the second opening, the insulating fastener is installed inside the interface component, and the insulating fastener is used to fix the conductive terminal; the conductive terminal is electrically connected to the inner conductor.

[0013] In the above technical solution, a sealing ring is further provided between the interface component and the second opening; and / or a sealing ring is provided between the protective cap and the first opening.

[0014] In the above technical solution, the shell body is further provided with a grounding hole.

[0015] This application also provides an electronic device, including the electromagnetic pulse protection device described above.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: The electromagnetic pulse protection device provided in this application not only achieves high-efficiency protection but also has a narrowband bandpass filtering function, which can effectively filter out out-of-band interference and improve the signal-to-noise ratio of the system in complex electromagnetic environments without the need for additional filter components.

[0017] This application also provides an electronic device, including the electromagnetic pulse protection device described in the above solution. Based on the above analysis, it is clear that the electronic device also possesses the aforementioned beneficial effects, which will not be elaborated further here. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A first structural schematic diagram of the electromagnetic pulse protection device provided in this application; Figure 2 A schematic diagram of the second structure of the electromagnetic pulse protection device provided in this application; Figure 3 A schematic diagram of the structure of the inner conductor provided in this application; Figure 4 A structural schematic diagram of the shell body provided in this application; Figure 5 Simulation results of the reflection loss S11 of the electromagnetic pulse protection device provided in this application; Figure 6 Simulation results of the insertion loss S21 of the electromagnetic pulse protection device provided in this application; Figure 7 Simulation results of residual current injected by lightning at 8 / 20µs 5kA for the electromagnetic pulse protection device provided in this application.

[0020] In the diagram: 1-Interface component; 2-Insulating fastener; 3-Protective cap; 4-Grounding block; 5-Short wire; 6-Plug-in hole; 7-Shell body; 701-First opening; 702-Second opening; 8-Inner conductor; 801-Mounting part; 802-Connecting part; 803-Slotted part; 9-Conductive terminal; 10-O-ring seal; 11-Grounding hole; 12-Annular groove. Detailed Implementation

[0021] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Example 1 See Figures 1 to 4 As shown, the electromagnetic pulse protection device provided in this application includes a conductive shell, an inner conductor 8, and a short-circuit assembly; the conductive shell is provided with an input interface and an output interface, the input interface is connected to one end face of the inner conductor 8, and the output interface is connected to the other end face of the inner conductor 8; the short-circuit assembly is electrically connected to the inner conductor 8, and the short-circuit assembly is electrically connected to the conductive shell; the short-circuit assembly has a preset input impedance to allow a preset signal to pass through and to attenuate the electromagnetic pulse; an annular groove 12 is provided on the side of the inner conductor 8 to form a compensating inductance at the inner conductor 8.

[0025] Specifically, in the short-circuit connection region, due to the need to introduce an insulating medium to fix the inner and outer conductors, and the local diameter of the inner conductor 8 being increased to accommodate the short-circuit assembly, a step-shaped size change is formed at the connection, resulting in a concentrated parasitic capacitance C.

[0026] This application incorporates an annular groove 12 at the connection point of the inner conductor 8. In transmission line theory, this structure is equivalent to a compensating inductor L, which precisely cancels out the parasitic capacitance C caused by the discontinuity of the inner conductor 8, thus achieving reactance neutralization. This compensation mechanism effectively maintains the high stability of the transmission line's characteristic impedance throughout the entire operating frequency band, thereby achieving ultra-low reflection loss performance. Specifically, the reflection loss S11 is less than -20dB, and the return loss exceeds 20dB in the 2GHz to 6GHz frequency band, which is typically a key indicator for high-performance RF components. This achievement is directly attributed to the successful application of the coplanar compensation structure of the inner conductor 8, making this device almost equivalent to an ideal transmission line at high frequencies, avoiding the inherent losses of existing solutions at high frequencies.

[0027] The electromagnetic pulse protection device provided in this application not only achieves high-efficiency protection but also has a narrowband bandpass filtering function, which can effectively filter out out-of-band interference and improve the signal-to-noise ratio of the system in complex electromagnetic environments without the need for additional filter components.

[0028] In an optional embodiment, the short-circuit component is connected to the middle of the inner conductor 8 along the length of the inner conductor 8, and an annular groove 12 is provided on both sides of the short-circuit component of the inner conductor 8.

[0029] In this embodiment, the short-circuit component is connected to the middle of the inner conductor 8, thereby forming a T-shaped symmetrical branch, which is beneficial for uniform energy distribution. The presence of annular grooves 12 on both sides of the connection point achieves a double-sided symmetrical design. Annular grooves 12 with identical parameters are provided on both sides of the short-circuit component, each groove effectively introducing a small series compensating inductor L. These two symmetrically distributed inductors work together to precisely offset the parallel parasitic capacitance C generated by the geometric abrupt change in the connection area, forming a local "LC resonance neutralization" structure, thereby significantly reducing the fluctuation of the overall input impedance.

[0030] In this embodiment, specifically, the inner conductor 8 is made of high-conductivity copper and its surface is plated with gold (thickness not less than 0.5 μm) or silver (thickness not less than 0.2 μm) to minimize skin effect loss of high-frequency signals. A mounting portion 801 is provided in the middle of the inner conductor 8, and a short-circuit component is connected to the mounting portion 801. Connecting portions 802 are provided at both ends of the inner conductor 8, and the two connecting portions 802 are respectively connected to the input interface and the output interface. A slotted portion 803 is provided between the mounting portion 801 and the two connecting portions 802, and the slotted portion 803 has an annular groove 12. The mounting portion 801, the slotted portion 803, and the connecting portion 802 are coaxially arranged.

[0031] In this embodiment, the central mounting portion 801 is used to fix and electrically connect the short-circuit assembly, forming the core anchor point of the resonant branch. Specifically, a stepped hole (with dimensions as shown) is provided in the middle of the inner conductor 8. Figure 3 As shown), a tin bronze insertion hole 6 (with a surface plating thickness of not less than 0.5 μm gold plating or not less than 0.2 μm silver plating) is installed at the stepped hole. One end of the short-circuit component is inserted into the insertion hole 6. The connection parts 802 located at both ends can reliably connect with the input and output interfaces, ensuring continuous signal transmission. The slotted part 803 between the mounting part 801 and the connection part 802 is provided with a compensation structure (annular groove 12) to offset the parasitic capacitance caused by abrupt changes in size and maintain impedance continuity. In this embodiment, the diameter of the mounting part 801 is larger than the diameter of the connecting part 802; a first groove wall of an annular groove 12 is formed between the mounting part 801 and the slotted part 803, and a second groove wall of an annular groove 12 is formed between the connecting part 802 and the slotted part 803, with the height of the first groove wall being greater than the height of the second groove wall.

[0032] In this embodiment, the mounting portion 801 serves as the connection anchor point for the short-circuit component, capable of receiving and conducting high-intensity pulse currents. The mounting portion 801 has a larger diameter to meet mechanical strength and electrical connection reliability requirements. The connecting portion 802 has a smaller diameter to match standard interfaces. The connecting portion 802 is used to connect input and output interfaces (such as N-type jacks), and its outer diameter must conform to the dimensional specifications of standard coaxial devices. The structures of the mounting portion 801 and the connecting portion 802 determine the unequal height of the two side walls of the annular groove 12.

[0033] like Figure 3 As shown, the total length of the inner conductor 8 is mm; the length of mounting part 801 is mm, the diameter of mounting part 801 is mm; the diameter of the slotted part 803 is mm, the groove width of the annular groove 12 is mm; the diameter of the connecting part 802 is mm.

[0034] In an optional embodiment, the short-circuit assembly includes a shorting wire 5 and a grounding block 4; one end of the shorting wire 5 is connected to the middle of the inner conductor 8, and the other end of the shorting wire 5 is connected to the grounding block 4; the grounding block 4 is connected to the conductive shell; the length of the shorting wire 5 is one-quarter of the wavelength corresponding to the center frequency of the operating frequency band.

[0035] In this embodiment, specifically, one end of the shorting wire 5 is inserted into the insertion hole 6 in the middle of the inner conductor 8 to ensure symmetrical loading; the grounding block 4 has a fixing hole, and the other end of the shorting wire 5 is threaded into the fixing hole, which provides a stable connection structure, prevents poor contact problems, and ensures precise control of the length of the shorting wire 5 and structural stability, avoiding performance stability issues caused by length deviation due to vibration or other factors. The grounding block 4 is connected to the conductive shell to form a complete grounding loop.

[0036] The length of jumper 5 is d, and it is set to one-quarter of the target operating wavelength λ (the wavelength corresponding to the center frequency of the operating band). According to the transmission line input impedance formula... At the operating frequency, the input impedance of jumper 5 is... The impedance approaches infinity (open circuit), allowing useful signals to pass through without loss. For low-frequency electromagnetic pulses or lightning pulses (mainly concentrated below 100MHz, with lightning below 35MHz), the shorting wire 5 exhibits extremely low impedance, causing the pulse energy to be rapidly shunted from the inner conductor 8 to the outer conductor and grounding system. The advantage of this technology is that it does not rely on active conduction, therefore no response time is required, and the residual energy can be reduced by approximately 70 times compared to unfiltered gas discharge tube protectors.

[0037] Example 2 The electromagnetic pulse protection device in this embodiment is an improvement based on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this embodiment.

[0038] In this optional embodiment, the conductive shell serves as both the outer conductor and the electromagnetic shield. It is made of leaded brass and its outer surface is plated with a ternary alloy (thickness not less than 2µm), which provides good conductivity and corrosion resistance, and ensures a low-impedance grounding path.

[0039] The conductive shell includes a shell body 7, a protective cap 3, and two interface assemblies. The shell body 7, as the main structural component, has a receiving cavity, in which the inner conductor 8 is disposed. The shell body 7 has two opposing second openings 702, both of which communicate with the receiving cavity. The two ends of the inner conductor 8 are respectively located at the two second openings 702. The two interface assemblies are respectively connected to the two second openings 702, and are electrically connected to the inner conductor 8, thus forming an input interface and an output interface.

[0040] The shell body 7 is also provided with a first opening 701 opposite to the middle of the inner conductor 8. The shorting wire 5 is located at the first opening 701. The protective cap 3 is a threaded cap structure and is connected to the first opening 701. The grounding block 4 is installed inside the protective cap 3. The protective cap 3 covers the short-circuit branch area, which can not only effectively shield external electromagnetic interference and protect internal structural components from environmental corrosion, but also achieve complete electrical connection with the shell body 7, further improving electromagnetic shielding and protection performance.

[0041] In the above structure, the inner conductor 8 is entirely contained within a metal shielded cavity, the main transmission line between the input and output interfaces is completely enclosed in a low-noise environment, and the shorting wire 5 branch is also locally shielded to prevent it from becoming a secondary radiation source. This structure significantly reduces the impact of external electromagnetic interference on sensitive high-frequency signals, improving the signal-to-noise ratio; at the same time, it suppresses stray emissions that the device itself may generate, meeting the standard requirements of communication equipment.

[0042] In an optional embodiment, the interface assembly includes an interface component 1, an insulating fastener 2, and a conductive terminal 9. The interface component 1 is connected to the second opening 702, and the insulating fastener 2 is installed inside the interface component 1 and is used to fix the conductive terminal 9. Specifically, the insulating fastener 2 is made of polytetrafluoroethylene (PTFE) with a dielectric constant of 2.02. As a low-loss dielectric, PTFE's stable dielectric constant and extremely low dielectric loss tangent are key to ensuring extremely low insertion loss S21. The inner conductor 8 has a connection hole at its end, and the conductive terminal 9 is specifically an interface socket made of high-conductivity copper material, with its surface plated with gold (thickness not less than 0.5 μm) or silver (thickness not less than 0.2 μm). The interface socket connects to the connection hole to achieve electrical connection with the inner conductor 8, minimizing skin effect loss of high-frequency signals.

[0043] In this embodiment, the interface component can specifically adopt a standard coaxial interface such as N-type, SMA, or 7 / 16 DIN to ensure physical and electrical compatibility with existing communication equipment, support hot-swapping and quick replacement, and improve maintenance efficiency. The interface component 1 can be securely connected to the second opening 702 using a threaded or snap-fit ​​structure to prevent loosening and detachment.

[0044] In this embodiment, an O-ring 10 made of silicone rubber is provided between the interface component 1 and the second opening 702; and / or an O-ring 10 made of silicone rubber is provided between the protective cap 3 and the first opening 701. This can achieve radial or axial sealing between the interface component 1, the protective cap 3 and the shell body 7, effectively blocking the path of moisture, dust and other substances to seep into the equipment through the gaps, significantly improving the dustproof and waterproof rating of the whole machine, ensuring the working stability and safety of the internal electronic components, and improving the environmental adaptability of the device so that the device can meet the usage requirements of complex environments such as outdoor communication base stations and radar equipment.

[0045] In this optional embodiment, the shell body 7 is provided with a grounding hole 11, which is specifically an M8 threaded interface, providing a reliable grounding path. In addition, the inner conductor 8 is designed with mounting holes at both ends, which can be embedded with metal plates for fixed grounding, further reducing grounding impedance and ensuring that pulse energy is efficiently discharged to the ground.

[0046] like Figures 5 to 7 As shown, the simulation results of this application verify its significant advantages in electrical performance and protection capabilities.

[0047] The protection device provided in this application exhibits excellent high-frequency broadband performance, with a reflection loss S11 of less than -20dB. This means that within the 2GHz to 6GHz frequency band, the return loss exceeds 20dB, which is typically a key indicator for evaluating high-performance RF components. This achievement is directly attributed to the successful application of the 8-coplanar compensation structure of the inner conductor, making the protection device of this application almost equivalent to an ideal transmission line in the high-frequency broadband range, thus avoiding the inherent losses of existing solutions at high frequencies.

[0048] The protective device provided in this application achieves high-efficiency transient protection. The extremely low residual current of 0.65A was obtained under a 5kA high-intensity impact, demonstrating the superiority of the device based on the quarter-wavelength transmission line discharge principle. This mechanism removes transient energy faster and more thoroughly than traditional clamping or breakdown mechanisms, significantly improving the survivability of critical electronic equipment.

[0049] The protective device provided in this application achieves functional integration. Through structural design, it not only achieves efficient electromagnetic pulse protection but also has narrowband bandpass filtering capabilities, effectively filtering out out-of-band interference and improving the signal-to-noise ratio of the system in complex electromagnetic environments, without requiring additional filter components.

[0050] The performance specifications of this device in the 2GHz-6GHz frequency band are shown in the table below.

[0051]

[0052] Example 3 This application provides an electronic device in embodiment three, which includes the electromagnetic pulse protection device of any of the above embodiments. Therefore, it has all the beneficial technical effects of the electromagnetic pulse protection device of any of the above embodiments, which will not be repeated here.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.

Claims

1. An electromagnetic pulse protection device, characterized in that, Includes a conductive shell, an inner conductor, and a short-circuit assembly; The conductive shell is provided with an input interface and an output interface. The input interface is connected to one end face of the inner conductor, and the output interface is connected to the other end face of the inner conductor. The short-circuit component is electrically connected to the inner conductor and to the conductive shell; the short-circuit component has a preset input impedance to allow a preset signal to pass through and to attenuate electromagnetic pulses. The inner conductor has an annular groove on its side to form a compensating inductance at the inner conductor.

2. The electromagnetic pulse protection device according to claim 1, characterized in that, Along the length of the inner conductor, the short-circuit assembly is connected to the middle of the inner conductor, and the inner conductor is provided with the annular groove on both sides of the short-circuit assembly.

3. The electromagnetic pulse protection device according to claim 2, characterized in that, The inner conductor has a mounting portion in the middle, and the short-circuit assembly is connected to the mounting portion; The inner conductor has connecting parts at both ends, and the two connecting parts are respectively connected to the input interface and the output interface; A slotted portion is provided between the mounting portion and the two connecting portions, and the slotted portion has the annular groove. The mounting part, the slotted part, and the connecting part are arranged coaxially.

4. The electromagnetic pulse protection device according to claim 3, characterized in that, The diameter of the mounting portion is greater than the diameter of the connecting portion; a first groove wall forms the annular groove between the mounting portion and the slotted portion, and a second groove wall forms the annular groove between the connecting portion and the slotted portion, wherein the height of the first groove wall is greater than the height of the second groove wall.

5. The electromagnetic pulse protection device according to claim 2, characterized in that, The short-circuit assembly includes a shorting wire and a grounding block; One end of the shorting wire is connected to the middle of the inner conductor, and the other end of the shorting wire is connected to the grounding block; the grounding block is connected to the conductive shell. The length of the jumper wire is one-quarter of the wavelength corresponding to the center frequency of the operating frequency band.

6. The electromagnetic pulse protection device according to claim 5, characterized in that, The conductive shell includes a shell body, a protective cap, and two interface components; The shell body is provided with a receiving cavity, a first opening and two second openings, and the first opening and the two second openings are all in communication with the receiving cavity; The two second openings are arranged opposite to each other, the inner conductor is located in the receiving cavity, and the two ends of the inner conductor are respectively located at the two second openings; the two interface components are respectively connected to the two second openings to form the input interface and the output interface, and the interface components are electrically connected to the inner conductor; The first opening is opposite to the middle of the inner conductor, the short wire is located at the first opening, the protective cap is connected to the first opening, and the grounding block is installed inside the protective cap.

7. The electromagnetic pulse protection device according to claim 6, characterized in that, The interface assembly includes an interface component, an insulating fastener, and conductive terminals; The interface component is connected to the second opening, the insulating fastener is installed inside the interface component, and the insulating fastener is used to fix the conductive terminal; the conductive terminal is electrically connected to the inner conductor.

8. The electromagnetic pulse protection device according to claim 7, characterized in that, A sealing ring is provided between the interface component and the second opening; and / or a sealing ring is provided between the protective cap and the first opening.

9. The electromagnetic pulse protection device according to claim 6, characterized in that, The shell body is provided with a grounding hole.

10. An electronic device, characterized in that, Includes the electromagnetic pulse protection device as described in any one of claims 1 to 9.

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