Electromagnetic compatibility type shielding structure and electromagnetic shielding connector

Abstract

The invention discloses an electromagnetic compatibility type shielding structure and an electromagnetic shielding connector, and relates to the technical field of connectors. The positive contact piece, the negative contact piece, the first capacitor and the second capacitor are arranged on the insulating shell, the first pins of the two capacitors are connected with the positive contact piece and the negative contact piece respectively, the second pins penetrate out of the insulating shell and are connected with the shielding piece, and the positive contact piece and the negative contact piece are conducted with the shielding piece. By means of the innovative structural design, low-impedance discharge of high-frequency common-mode noise is achieved in a limited space, the feasibility of an on-site wire making process is kept, and finally the signal integrity of core communication equipment such as an AAU is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to an electromagnetic compatibility shielding structure and an electromagnetic shielding connector. Background Art

[0002] In outdoor communication equipment, power connectors are key components for ensuring stable operation. They must simultaneously meet waterproofing, dustproofing, and electromagnetic compatibility (EMC) requirements. EMC performance directly impacts the signal transmission quality of core communication equipment like AAUs. Failure to effectively control high-frequency noise can lead to signal interference, reduced transmission rates, and even communication interruptions.

[0003] In existing technology, rectangular shielded waterproof connectors are the mainstream choice for outdoor power transmission. Their core EMC solution is based on the "shield grounding" principle, employing a shield conduction path: cable shield → plug metal housing → socket metal housing → equipment panel grounding. The metal shield semi-encloses the internal positive and negative conductors, utilizing the Faraday cage effect to suppress noise radiation, thereby achieving basic electromagnetic compatibility.

[0004] Long-term engineering verification has revealed two unavoidable flaws in existing solutions, which severely restrict the communication performance of core communication equipment such as AAUs: Defect 1: Semi-enclosed shielding leads to insufficient EMI performance: Because rectangular connectors must adapt to on-site wiring processes (i.e., on-site stripping, crimping, etc.), their shielding structure cannot be designed as a fully enclosed structure like metal circular connectors. This structural limitation inevitably leads to gaps in the shield, through which high-frequency noise can directly leak; Defect 2: High ground path impedance leads to inefficient common-mode noise dissipation: In existing solutions, noise currents must pass through a multi-stage connection path: cable shield, plug metal housing, receptacle metal housing, and device panel. Each connection introduces impedance due to factors such as contact resistance and assembly clearance. The combined effect of these impedances reduces the efficiency of common-mode noise dissipation. Consequently, a significant amount of noise cannot be effectively dissipated through the ground path and is instead coupled into the communications equipment through conductors, affecting signal integrity.

[0005] In summary, the structural design of the existing rectangular shielded waterproof connector can no longer meet the equipment's needs for high-frequency noise suppression. A new electromagnetic compatibility shielding structure is urgently needed to improve EMI performance and noise discharge efficiency while retaining the feasibility of on-site wiring process. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an electromagnetic compatibility shielding structure and an electromagnetic shielding connector, which, through innovative structural design, can achieve low-impedance discharge of high-frequency common-mode noise in a limited space while maintaining the feasibility of on-site wiring technology, ultimately improving the signal integrity of core communication equipment such as AAU.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: In one aspect, the present invention discloses an electromagnetic compatibility shielding structure, comprising: an insulating shell, wherein a accommodating cavity is provided in the insulating shell; Two contacts, including a positive contact and a negative contact, are installed in the accommodating cavity; A shielding sheet, mounted on the insulating housing; The first capacitor and the second capacitor are arranged in the accommodating cavity, and both include a capacitor body and two pins connected to the capacitor body, wherein the first pin of the first capacitor is connected to the positive contact piece, and the first pin of the second capacitor is connected to the negative contact piece; the second pin of the first capacitor and the second pin of the second capacitor are both conductively connected to the shielding piece, thereby realizing conduction between the two contact pieces and the shielding piece.

[0008] Furthermore, the first capacitor is disposed adjacent to the positive electrode contact piece, and the second capacitor is disposed adjacent to the negative electrode contact piece.

[0009] Furthermore, the accommodating cavity is divided into two independent placement slots by a partition plate, and the two capacitors are respectively placed in the corresponding placement slots.

[0010] Furthermore, the size of the placement groove matches the size of the capacitor body, and the groove is filled with a colloid for fixing the capacitor.

[0011] Furthermore, the shielding sheet includes a main shielding surface covering the rear end surface of the insulating shell and a bent pin connected to the main shielding surface. The bent pin extends toward the plug-in end of the contact piece from the main shielding surface and is bent in a direction perpendicular to the plug-in direction of the contact piece toward the direction surrounding the insulating shell.

[0012] Furthermore, the second pin of the first capacitor and the second pin of the second capacitor are short-circuited in the insulating shell to form a combined pin, which extends out of the insulating shell, and the extension direction is on the same side as the plug-in end of the contact piece, and is welded and fixed to the bent pin on the shielding sheet.

[0013] Furthermore, a semicircular groove is provided on the partition plate for accommodating the second pin of the first capacitor or the second capacitor.

[0014] Furthermore, a bent portion is provided in the middle of each of the positive electrode contact piece and the negative electrode contact piece, and the first pin is fixed to the bent portion by welding.

[0015] Furthermore, a pin avoidance area is provided in the placement groove for accommodating the first pin, so as to facilitate welding of the first pin and the bent portion.

[0016] Furthermore, the semicircular groove is arranged adjacent to the plug-in end, and the pin avoidance area is arranged away from the plug-in end.

[0017] Furthermore, the insulating shell is provided with a pin outlet hole for the second pin or the combined pin to pass through.

[0018] Furthermore, a circular hole is opened on the bent portion or the bent pin, and the corresponding pin passes through the circular hole and is welded and fixed to the inner wall of the circular hole.

[0019] Furthermore, the first capacitor and the second capacitor are both Y-type safety capacitors.

[0020] On the other hand, the present invention discloses an electromagnetic shielding connector, comprising the above-mentioned electromagnetic compatibility shielding structure.

[0021] Furthermore, the connector includes a plug and a socket, and the electromagnetic compatibility shielding structure is provided on the plug.

[0022] The electromagnetic compatibility shielding structure and electromagnetic shielding connector of the present invention effectively make up for the shortcomings of the existing technology through innovative structural design and integration solutions. The specific beneficial effects are as follows: (1) The existing technology relies on semi-enclosed shielding to suppress noise diffusion, but the presence of gaps leads to insufficient EMI performance. The present invention transforms the solution from "suppressing interference diffusion" to "providing a low-impedance discharge path for interference" by integrating Y-type safety capacitors. Y-type safety capacitors are designed specifically to suppress common-mode interference and can directly provide a low-impedance path from the positive and negative poles to the shielding plate for high-frequency common-mode noise, allowing the noise to be grounded through the shielding plate rather than radiated or entering the device through the gap. At the same time, the capacitor is placed on the connector plug (outside of the device), which is more effective than placing it on the inside of the device (on the socket). It can intercept noise more directly and prevent noise from entering the device and affecting the communication performance of devices such as AAU.

[0023] (2) Existing technologies that attempt to add filtering components are often limited by the narrow space of the connector. The present invention achieves efficient space utilization through optimized layout: on the one hand, the width of the capacitor placement slot on the insulating housing is comparable to the width of the capacitor, stably accommodating the capacitor within a limited space; on the other hand, the semicircular groove between the two slots of the insulating housing provides a fixed space for pin shorting, avoiding space waste caused by cluttered pins. This design allows the capacitor, contact, and shielding sheet to be integrated in an orderly manner within a narrow space, improving electromagnetic compatibility performance without expanding the connector volume.

[0024] (3) In the prior art, if components such as capacitors are not fixed properly, the pins may break or the solder joints may fall off due to vibration. The present invention improves reliability through multiple structural designs: first, the capacitor is placed in the placement slot and then glued and solidified, which completely avoids the capacitor shaking caused by vibration during use and prevents the pins from being broken by force; second, an air avoidance area is set under the solder joints of the capacitor and the contact piece to provide a buffer space for the capacitor pins (the hard area connected to the body) to avoid the pins from breaking due to excessive bending stress; third, the bent part of the contact piece provides a reasonable operating position for welding, and the cup-shaped mouth facilitates the accumulation of solder, ensuring that the solder joints are firm and reducing the risk of cold soldering and desoldering.

[0025] (4) In the present invention, the second pins of the two capacitors are short-circuited internally and then welded to the shielding sheet, which reduces the number of external welding points, makes the product appearance neater and more beautiful, and reduces the risk of loosening of the external welding points.

[0026] (5) In the present invention, a gap is left between the plastic shell and the shielding plate pins, which can block the heat transfer during welding, prevent the plastic shell from being deformed or aged due to high temperature, and extend the service life of the connector.

[0027] (6) The present invention does not require the use of a complex fully enclosed metal shielding structure (which is costly and not suitable for on-site wiring). Instead, it integrates low-cost Y-type safety capacitors and an optimized structural design to achieve performance improvements based on existing rectangular connectors, taking into account both low cost and high electromagnetic compatibility performance, and is suitable for application scenarios of outdoor power supplies for communications.

[0028] (7) By improving the EMI performance of the connector, the interference of high-frequency noise on communication equipment such as AAU can be effectively reduced, the signal integrity of wireless base stations can be guaranteed, and the signal quality of end users when using mobile phones and other communication equipment can be improved, reducing problems such as call interruptions and data transmission delays. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a schematic diagram of the shielding structure in the present invention.

[0031] Figure 2 This is one of the structural diagrams of an insulator.

[0032] Figure 3 This is the second structural diagram of an insulator.

[0033] Figure 4 It is a structural diagram of the insulator and contact.

[0034] Figure 5 It is a structural diagram of the contact.

[0035] Figure 6 It is a structural diagram of the insulator, capacitor and contact.

[0036] Figure 7 It is a structural diagram of the connector.

[0037] Figure 8 is a cross-sectional view of the connector.

[0038] Markings in the diagram: 1. Plastic shell; 2. Positive contact; 3. Negative contact; 4. Merged pin; 5. Shielding sheet; 501. Bent pin; 6. Insulator; 601. Pin avoidance area; 602. Placement groove; 6021. First placement groove; 6022. Second placement groove; 603. Semicircular groove; 604. Partition plate; 605. Mounting hole; 7. Pin outlet hole; 8. Bending portion; 9. First capacitor; 10. Second capacitor; 11. First pin; 12. Second pin. DETAILED DESCRIPTION

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0041] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0042] The present invention discloses an electromagnetic compatibility shielding structure and an electromagnetic shielding connector. By integrating two capacitors inside the connector, a DC path and noise discharge path of "contact piece-capacitor-shielding sheet" are constructed. The high-frequency characteristics of the capacitor are utilized to provide a low-impedance discharge channel for common-mode noise. Combined with an optimized structural design, the defects of the existing technology are solved.

[0043] First, the electromagnetic compatibility shielding structure is explained. Figures 1 to 6 The specific structure includes four core components: an insulating shell, two capacitors, two contacts and a shielding sheet 5.

[0044] 〈Insulation housing〉 The insulating housing includes a plastic housing 1 and an insulator 6 .

[0045] Please refer to Figure 1 The plastic housing 1 serves as the outer protective layer of the entire structure. It is injection-molded from a weather-resistant engineering plastic (such as PBT) and has an overall rectangular box-like structure. It offers sufficient structural strength and waterproofing, making it suitable for outdoor power supply environments. It houses a mounting cavity that matches the shape of the insulator 6. Positioning bosses are located on the inner wall of the cavity to limit the axial and radial position of the insulator 6, ensuring it is securely mounted within the plastic housing 1 without loosening.

[0046] A through pin hole 7 is provided on one side wall of the plastic housing 1 (located on the same side as the plug-in end of the contact, specifically the side from which the contact pin / socket extends). The number of holes matches the total number of the second pins 12 of the capacitors, and generally two holes are required. Preferably, when the second pins 12 of the first capacitor 9 and the second capacitor 10 are short-circuited in the insulator 6 and then extended, only one through hole is required. The diameter of the hole is slightly larger than the diameter of the pin, which facilitates the pin's passage while preventing dust or moisture from intruding due to excessive gaps.

[0047] Please refer to Figures 2 to 4Insulator 6 is made of a plastic material with excellent insulating properties (such as PA66) and is integrally mounted within the mounting cavity of plastic housing 1, secured by engaging with positioning bosses on the inner wall of plastic housing 1. Two independent placement slots 602 (a first placement slot 6021 and a second placement slot 6022) are defined along the length of insulator 6. These slots are separated by a partition plate 604, ensuring electrical insulation between the positive contact 2 and the negative contact 3.

[0048] The first placement groove 6021 and the second placement groove 6022 are used to accommodate the first capacitor 9 and the second capacitor 10, respectively. The width of the placement groove 602 (typically rectangular) is comparable to the width of the capacitor body to reduce lateral shaking of the capacitor after installation. The length and depth of the placement groove 602 match the size of the capacitor to ensure that the capacitor body can be stably embedded. After the capacitor is placed in the placement groove 602, a glue filling space is reserved in the groove for injecting glue. After the glue solidifies, it forms an elastic support, which can prevent the pins from breaking or solder joints from falling off due to vibration during use.

[0049] Two mounting holes 605 are provided on the insulator 6, which are used to mount the positive contact 2 and the negative contact 3. The mounting holes 605 have an interference fit with the outer shape of the contacts, ensuring that there is no axial movement of the contacts after insertion.

[0050] The sidewalls of the first placement slot 6021 and the second placement slot 6022 adjacent to the mounting hole 605 are each provided with a groove, forming a pin clearance area 601. The location of this groove corresponds to the welding area between the capacitor pin and the upper bend 8 of the contact member. Because the connection area between the capacitor pin and the capacitor body has been hardened and is relatively brittle, the pin clearance area 601 prevents the pin from breaking due to bending stress and provides space for welding operations. The mounting hole 605 for mounting the positive contact member 2 is connected to the first placement slot 6021 through the pin clearance area 601. The mounting hole 605 and the pin clearance area 601 are axially offset. After the positive contact member 2 is installed in the mounting hole 605, its L-shaped bend 8 extends from the mounting hole 605 to above the pin clearance area 601. The mounting hole 605 for mounting the negative contact member 3 is connected to the second placement slot 6022, and the bend 8 of the negative contact member 3 extends above the pin clearance area 601 in the second placement slot 6022. This design provides a stable and easy-to-operate welding platform for the first pin 11. Without this bending structure, the capacitor pin may need to be directly welded to the contact body, which is confined and difficult to operate, and the reliability and consistency of the welding point are difficult to ensure.

[0051] The insulator 6 is provided with a pin hole 7 for the second pin 12 of the capacitor or the combined pin 4 to pass through and connect to the shielding plate 5. The position of the pin hole 7 corresponds to the bent pin 501 of the shielding plate 5, ensuring that the pin can be directly soldered to the shielding plate 5 after passing through.

[0052] A semicircular groove 603 is formed at the top of the separator 604 to accommodate and secure the second pin 12 of the capacitor. The arc of the semicircular groove 603 matches the diameter of the second pin 12, ensuring that the second pin 12 does not wobble when passing through the two cavities and preventing damage to the insulation layer caused by friction between the second pin 12 and the separator 604. The semicircular groove 603 can accommodate the second pin 12 of either the first capacitor 9 or the second pin 12 of the second capacitor 10, depending on the actual situation (such as the location of the pin hole 7 and the length of the pin).

[0053] <Positive Contact 2 and Negative Contact 3> The positive contact 2 and the negative contact 3 are both made of copper alloy. They have the same structure but are installed in independent positions. The positive contact 2 and the negative contact 3 are provided with a pin / socket, and the end containing the plug-in hole / socket is defined as the plug-in end. The structural design of the positive contact 2 and the negative contact 3 is specially optimized for welding with the capacitor pins. A bending portion 8 is integrally formed in the middle of the contact, which can be welded and fixed to the first pin 11 of the capacitor. The bending portion 8 is an L-shaped structure as a whole, which is formed by extending the edge of the contact body perpendicular to the plug-in direction and then bending in the direction of the corresponding placement groove 602, so as to be suspended above the pin avoidance area 601. The setting of the bending portion 8 makes the welding position of the contact and the capacitor pin away from the plug-in and unplugging area of ​​the contact, avoiding the plug-in and unplugging force affecting the stability of the solder joint. The positive contact 2 is installed in the mounting hole 605 on the left side of the insulator 6, with its bent portion 8 extending toward the first placement slot 6021 (where the first capacitor 9 is located). The negative contact 3 is installed in the mounting hole 605 on the right side of the insulator 6, with its bent portion 8 extending toward the second placement slot 6022 (where the second capacitor 10 is located). The bent portions of the two contacts do not intersect, ensuring no electrical interference between the positive and negative electrodes. The ends of the contacts are provided with pins or sockets (compatible with the corresponding socket) for plugging in and out of the power supply.

[0054] A circular hole is provided on the bent portion 8 to facilitate the first pin 11 of the capacitor to pass through; the mouth of the circular hole is designed to have a cup-shaped structure, which can accommodate more solder during welding, thereby improving the mechanical strength and electrical conductivity of the solder joint.

[0055] The soldering point between the negative contact 3 and the first pin 11 of the second capacitor 10 (referred to as the "capacitor soldering point") is positioned away from the semicircular groove 603 on the partition plate 604. This arrangement is achieved by positioning the semicircular groove 603 near the front end of the placement slot 602 (close to the insertion end) along the contact insertion direction, while the soldering point between the capacitor's first pin 11 and the L-shaped bend 8 is positioned near the rear end of the placement slot 602 (away from the insertion end). This axial spacing between the two pins along the insertion direction completely prevents accidental contact between the pin at the soldering point and the second pin 12 in the semicircular groove 603.

[0056] 〈Shielding sheet 5〉 The shielding sheet 5 is stamped and formed from a highly conductive elastic material (such as phosphor bronze). It comprises a main shielding surface and an enclosure structure. The main shielding surface covers the rear end surface of the plastic housing 1. The enclosure structure extends forward beyond the plastic housing 1 and surrounds at least a portion of the outer sides of the positive and negative contacts 2 and 3, forming a semi-enclosed structure that partially surrounds the positive and negative contacts 2 and 3, thereby enhancing the shielding effect. Bent pins 501 are integrally stamped on the main shielding surface (the plane covering the rear end surface of the plastic housing 1) of the shielding sheet 5, corresponding to the pin exit holes 7 of the plastic housing 1. The bent pins 501 extend from the main shielding surface toward the contact's mating end, then bend 90° perpendicular to the direction of contact mating (i.e., perpendicular to the direction of pin / socket extension) toward the sidewalls of the plastic housing 1, ultimately forming an L-shaped structure.

[0057] The bent pin 501 is used for soldering to the second pin 12 of the capacitor, or to the combined pin 4 formed by shorting two second pins 12. The bent pin 501 is provided with a circular hole for the pin to pass through. This hole matches the cup-shaped hole structure at the mouth of the circular hole on the contact, facilitating solder accumulation during soldering and ensuring a reliable connection with the capacitor pin. A thermal insulation gap of 1.0±0.1mm is reserved between the bent pin 501 of the shielding sheet 5 and the plastic housing 1. This gap prevents heat from being transferred to the plastic housing 1 during soldering, preventing the plastic from melting and deforming due to the high temperature.

[0058] At the same time, a snap-on structure is provided on the side of the shielding sheet 5, which cooperates with the card slot on the outside of the plastic shell 1 to realize the detachable fixation of the shielding sheet 5 on the plastic shell 1 (or fastened by screws, selected according to assembly requirements), ensuring that the relative position of the shielding sheet 5 and the plastic shell 1 is stable.

[0059] <First Capacitor 9 and Second Capacitor 10> The first capacitor 9 is installed in the first placement groove 6021, and the capacitor body is fixed in the groove by glue to prevent the capacitor from shifting due to vibration; the second capacitor 10 is installed in the second placement groove 6022, and the fixing method is the same as the first capacitor.

[0060] The first capacitor 9 and the second capacitor 10 each include a capacitor body and two pins connected to the capacitor body. The connection relationship between the capacitor, the contact member, and the shielding sheet is as follows: Connection with contacts: The positive contact 2 is welded to the first pin 11 of the first capacitor 9, and the negative contact 3 is welded to the first pin 11 of the second capacitor 10, so as to realize electrical connection between the capacitor and the positive and negative conductors; Connection with the shielding plate 5: The second pin 12 of the first capacitor 9 and the second pin 12 of the second capacitor 10 directly pass through the pin outlet hole 7 of the insulator 6, and are then welded to the bent pin 501 of the shielding plate 5 to achieve electrical connection between the capacitor and the shielding plate, thereby constructing a noise discharge path of "positive / negative contact → capacitor → shielding plate". Preferably, in order to achieve the effect of reducing external welding points and a neat appearance, the second pin 12 of the first capacitor 9 and the second pin 12 of the second capacitor 10 can be short-circuited inside the insulator 6 to form a merged pin 4, which passes through the pin outlet hole 7 of the insulator 6 and the plastic shell 1 in turn, and is finally inserted into the cup-shaped welding hole of the bent pin 501 on the shielding plate 5, and is fixed by soldering to achieve a conductive connection between the two capacitors and the shielding plate.

[0061] It should be noted that the two capacitors are Y-type safety capacitors, which are commonly used components between power lines and ground. Their core function is to suppress common-mode interference. By relying on their low impedance characteristics for high-frequency signals, they build a dedicated low-impedance conduction path for high-frequency common-mode noise, causing the noise current to be directed through the capacitor to the ground line rather than invading the load or radiating to the outside world.

[0062] The core working principle of this shielding structure is to provide a low-impedance discharge path for high-frequency common-mode noise through the synergistic effect of "capacitive coupling + shield grounding" without affecting the normal transmission of DC or low-frequency power signals. The details are as follows: (1) During power transmission, the positive contact 2 and the negative contact 3 will generate common-mode noise (mainly high-frequency signals, usually ≥1MHz) due to electromagnetic induction. Since the first capacitor 9 and the second capacitor 10 are Y-type safety capacitors, their capacitance characteristics make them present low impedance to high-frequency signals and high impedance to DC or low-frequency power signals. Therefore, high-frequency common-mode noise will preferentially be transmitted through the path formed by the capacitors, while the power signal will be transmitted normally along the contacts to the load, and the two will not interfere with each other.

[0063] (2) The high-frequency common-mode noise on the positive contact 2 flows into the capacitor body through the first pin 11 of the first capacitor 9 and is coupled to the second pin 12 through the dielectric inside the capacitor; the high-frequency common-mode noise on the negative contact 3 flows into the capacitor body through the first pin 11 of the second capacitor 10 and is also coupled to the second pin 12. The second pins 12 of the two capacitors (or after forming a unified path by short-circuiting) transmit the collected noise signal to the shielding plate 5. Since the shielding plate 5 is connected to the metal casing (or ground terminal) of the device, the noise is eventually discharged to the ground through the shielding plate 5, preventing the noise from interfering with other devices through space radiation or conductor coupling.

[0064] (3) The semi-enclosed structure of the shielding sheet 5 can, on the one hand, block electromagnetic interference from the external environment from invading the contacts and capacitors, and on the other hand, prevent the noise that has not been completely discharged from radiating to the outside world, complementing the noise discharge function of the capacitor and further improving the overall electromagnetic compatibility performance.

[0065] Next, the specific structure of the electromagnetic shielding connector is explained, please refer to Figure 7 and Figure 8 , the connector includes the above-mentioned shielding structure.

[0066] It should be noted that when the connector includes a plug and a socket, placing the capacitor on the outside of the device (i.e., on the connector plug) can achieve better results than placing it on the inside of the device (i.e., on the connector socket). The reason is that the former can intercept and channel the noise before it enters the device, thereby reducing the interference of noise on the core components of the device from the source.

[0067] The conductive path of the connector is: positive contact 2 → first pin 11 of the first capacitor 9 → first capacitor body → second pin 12 of the first capacitor 9 → (short-circuited with the second pin 12 of the second capacitor 10) → shielding plate 5; negative contact 3 → first pin 11 of the second capacitor 10 → second capacitor body → second pin 12 of the second capacitor 10 → (short-circuited with the second pin 12 of the first capacitor 9) → shielding plate 5. Ultimately, the positive contact 2 and the negative contact 3 are electrically connected to the shielding plate 5 through the capacitor, providing a low-impedance discharge path from the positive and negative electrodes to the shielding plate for high-frequency common-mode noise.

[0068] In summary, the electromagnetic compatibility shielding structure and electromagnetic shielding connector of the present invention effectively solve the problems of insufficient EMI performance and excessive grounding path impedance in the prior art through innovative capacitor integration design, optimized structural layout and reliable connection method, while improving mechanical reliability and cost advantages. They are suitable for outdoor environments where core equipment such as AAU has strict electromagnetic compatibility requirements.

[0069] The above describes in detail the electromagnetic compatibility shielding structure and electromagnetic shielding connector provided by the present invention. Specific examples are used herein to illustrate the principles and specific implementations of the present invention. The above examples are intended only to facilitate understanding of the methods and core concepts of the present invention. It should be noted that, for those skilled in the art, any simple modifications, equivalent variations, and modifications to the above examples based on the technical essence of the present invention fall within the scope of protection of the present invention.

Claims

1. An electromagnetic compatibility shielding structure, characterized in that: include: an insulating shell, wherein a accommodating cavity is provided in the insulating shell; Two contact pieces, including a positive contact piece (2) and a negative contact piece (3), are installed in the accommodating cavity; A shielding sheet (5) is mounted on the insulating housing; The first capacitor (9) and the second capacitor (10) are arranged in the accommodating cavity, and each includes a capacitor body and two pins connected to the capacitor body, wherein the first pin (11) of the first capacitor (9) is connected to the positive contact piece (2), and the first pin (11) of the second capacitor (10) is connected to the negative contact piece (3); the second pin (12) of the first capacitor (9) and the second pin (12) of the second capacitor (10) are conductively connected to the shielding piece (5), thereby achieving conduction between the two contact pieces and the shielding piece (5).

2. The electromagnetic compatibility shielding structure according to claim 1, characterized in that: The first capacitor (9) is arranged adjacent to the positive contact piece (2), and the second capacitor (10) is arranged adjacent to the negative contact piece (3).

3. The electromagnetic compatibility shielding structure according to claim 1, characterized in that: The accommodating cavity is divided into two independent placement slots (602) by a partition plate (604), and the two capacitors are respectively placed in the corresponding placement slots (602).

4. The electromagnetic compatibility shielding structure according to claim 3, characterized in that: The size of the placement groove (602) matches the size of the capacitor body, and the groove is filled with colloid for fixing the capacitor.

5. The electromagnetic compatibility shielding structure according to claim 4, characterized in that: The shielding sheet (5) comprises a main shielding surface covering the rear end surface of the insulating housing and a bent pin (501) connected to the main shielding surface, wherein the bent pin (501) extends toward the plug-in end of the contact piece from the main shielding surface and is bent in a direction perpendicular to the plug-in direction of the contact piece toward a direction surrounding the insulating housing.

6. The electromagnetic compatibility shielding structure according to claim 5, characterized in that: The second pin (12) of the first capacitor (9) and the second pin (12) of the second capacitor (10) are short-circuited in the insulating housing to form a combined pin (4). The combined pin (4) extends out of the insulating housing, and the extending direction is located on the same side as the plug-in end of the contact piece, and is welded and fixed to the bent pin (501) on the shielding sheet (5).

7. The electromagnetic compatibility shielding structure according to claim 6, characterized in that: The partition plate (604) is provided with a semicircular groove (603) for accommodating the second pin (12) of the first capacitor (9) or the second capacitor (10).

8. The electromagnetic compatibility shielding structure according to claim 7, characterized in that: A bent portion (8) is provided in the middle of each of the positive electrode contact piece (2) and the negative electrode contact piece (3), and the first pin (11) is fixed to the bent portion (8) by welding.

9. The electromagnetic compatibility shielding structure according to claim 8, characterized in that: A pin avoidance area (601) is provided in the placement groove (602) for accommodating the first pin (11) to facilitate welding of the first pin (11) and the bent portion (8).

10. The electromagnetic compatibility shielding structure according to claim 9, characterized in that: The semicircular groove (603) is arranged adjacent to the plug-in end, while the pin avoidance area (601) is arranged away from the plug-in end, and there is a distance between the two in the plug-in direction.

11. The electromagnetic compatibility shielding structure according to claim 6, characterized in that: The insulating housing is provided with a pin outlet hole (7) for the second pin (12) or the combined pin (4) to pass through.

12. The electromagnetic compatibility shielding structure according to claim 11, characterized in that: A circular hole is formed on the bending portion (8) or the bending pin (501), and the corresponding pin passes through the circular hole and is welded and fixed to the inner wall of the circular hole.

13. The electromagnetic compatibility shielding structure according to claim 1, characterized in that: The first capacitor (9) and the second capacitor (10) are both Y-type safety capacitors.

14. An electromagnetic shielding connector, characterized in that: The electromagnetic compatibility shielding structure comprises the electromagnetic compatibility shielding structure according to any one of claims 1 to 13.

15. The electromagnetic shielding connector according to claim 14, characterized in that: The connector comprises a plug and a socket, and the electromagnetic compatibility shielding structure is arranged on the plug.

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