Electromagnetic compatibility type shielding structure and electromagnetic shielding connector

Abstract

The application discloses an electromagnetic compatibility type shielding structure and an electromagnetic shielding connector, and relates to the technical field of connectors. The application is characterized in that a positive contact piece, a negative contact piece and a first capacitor and a second capacitor accommodated in a cavity are mounted on an insulating shell, the first pins of the two capacitors are connected with the positive and negative contact pieces respectively, the second pins of the two capacitors pass through the insulating shell and are connected with a shielding sheet, and the positive and negative contact pieces are in conduction with the shielding sheet. Through the innovative structural design, the application realizes low-impedance discharge of high-frequency common-mode noise in limited space, maintains the feasibility of field wiring process, and finally improves the signal integrity of core communication equipment such as AAU.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and in particular to an electromagnetic compatibility shielding structure and an electromagnetic shielding connector. Background Technology

[0002] In outdoor communication equipment, the power connector is a key component ensuring stable operation, and it needs to meet waterproof, dustproof, and electromagnetic compatibility (EMC) requirements simultaneously. Among these, EMC performance directly affects the signal transmission quality of core communication equipment such as AAU. If high-frequency noise is not effectively controlled, it can lead to signal interference, reduced transmission rates, or even communication interruption.

[0003] In existing technologies, rectangular shielded waterproof connectors are the mainstream choice for outdoor power transmission. Their core EMC solution is designed based on the principle of "shielding layer grounding," and the shielding conduction path is: cable shielding layer → plug metal shell → socket metal shell → equipment panel grounding. By forming a semi-enclosed structure for the internal positive and negative conductors through the metal shield, the Faraday cage effect is used to suppress noise radiation, thereby achieving basic electromagnetic compatibility capabilities.

[0004] Long-term engineering verification has revealed two unavoidable flaws in the existing solution, which severely restrict the communication performance of core communication equipment such as AAU:

[0005] Defect 1: Insufficient EMI performance due to semi-enclosed shielding: Because rectangular connectors need to adapt to field wiring processes (i.e., field wire stripping, crimping, etc.), their shielding structure cannot be designed as a fully enclosed structure like that of metal circular connectors. This structural limitation inevitably results in gaps in the shielding, through which high-frequency noise can leak directly.

[0006] Defect 2: High grounding path impedance and low common-mode noise discharge efficiency: In the existing solution, noise current needs to pass through a multi-stage connection path of "cable shielding layer → plug metal shell → socket metal shell → equipment panel". Each stage of connection introduces impedance due to factors such as contact resistance and assembly gaps. After these impedances are superimposed, the common-mode noise discharge efficiency is reduced. A large amount of noise cannot be effectively discharged through the grounding path and instead couples into the communication equipment through the conductor, affecting signal integrity.

[0007] In summary, the existing rectangular shielded waterproof connector design can no longer meet the equipment's requirements for high-frequency noise suppression. There is an urgent need for a new electromagnetic compatibility shielding structure that can improve EMI performance and noise discharge efficiency while retaining the feasibility of on-site wiring. Summary of the Invention

[0008] In view of this, the purpose of this invention is to provide an electromagnetically compatible shielding structure and an electromagnetically shielded connector. Through innovative structural design, it achieves low-impedance discharge of high-frequency common-mode noise in a limited space, while maintaining the feasibility of field wiring processes, and ultimately improves the signal integrity of core communication equipment such as AAU.

[0009] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0010] On one hand, this invention discloses an electromagnetic compatibility shielding structure, comprising:

[0011] An insulating housing, wherein the insulating housing has a receiving cavity;

[0012] Two contacts, including a positive contact and a negative contact, are installed in the receiving cavity;

[0013] The shielding plate is mounted on the insulating housing;

[0014] The first capacitor and the second capacitor are disposed in the receiving cavity. Each capacitor includes a capacitor body and two pins connected to the capacitor body. The first pin of the first capacitor is connected to the positive contact, and the first pin of the second capacitor is connected to the negative contact. The second pins of the first capacitor and the second pin of the second capacitor are both electrically connected to the shielding sheet, thereby realizing the conduction between the two contacts and the shielding sheet.

[0015] Furthermore, the first capacitor is disposed near the positive electrode contact, and the second capacitor is disposed near the negative electrode contact.

[0016] Furthermore, the receiving cavity is divided into two independent placement slots by a partition plate, and the two capacitors are placed in their respective placement slots.

[0017] Furthermore, the size of the placement groove matches the size of the capacitor body, and the groove is filled with colloid for fixing the capacitor.

[0018] 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 from the main shielding surface toward the insertion end of the contact and is bent in a direction perpendicular to the insertion direction of the contact in the direction surrounding the insulating shell.

[0019] Furthermore, the second pin of the first capacitor and the second pin of the second capacitor are short-circuited inside the insulating housing to form a combined pin. The combined pin extends out of the insulating housing and its extension direction is on the same side as the insertion end of the contact, and is welded and fixed to the bent pin on the shielding sheet.

[0020] Furthermore, the partition plate is provided with a semi-circular groove for placing the second pin of the first capacitor or the second capacitor.

[0021] Furthermore, both the positive and negative contacts have a bent portion in the middle, and the first pin is welded and fixed to the bent portion.

[0022] Furthermore, the placement groove is provided with a pin clearance area to accommodate the first pin, which facilitates the welding of the first pin to the bent part.

[0023] Furthermore, the semi-circular groove is positioned adjacent to the plug end, while the pin clearance area is positioned away from the plug end.

[0024] Furthermore, the insulating housing is provided with pin protrusion holes for the second pin or the combined pin to protrude.

[0025] Furthermore, a circular hole is opened on the bent part 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.

[0026] Furthermore, both the first capacitor and the second capacitor are Y-type safety capacitors.

[0027] On the other hand, the present invention discloses an electromagnetic shielding connector, including the above-mentioned electromagnetic compatibility shielding structure.

[0028] Furthermore, the connector includes a plug and a socket, and the electromagnetic compatibility shielding structure is disposed on the plug.

[0029] The electromagnetic compatibility shielding structure and electromagnetic shielding connector of the present invention effectively overcome the shortcomings of the prior art through innovative structural design and integration scheme, and the specific beneficial effects are as follows:

[0030] (1) Existing technologies rely on semi-enclosed shielding to suppress noise diffusion, but the presence of gaps leads to insufficient EMI performance. This invention, by integrating Y-type safety capacitors, changes the solution from "suppressing interference diffusion" to "providing a low-impedance discharge path for interference." Y-type safety capacitors are specifically designed to suppress common-mode interference and can directly provide a low-impedance path from the positive and negative terminals 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 gaps. At the same time, the capacitors are placed on the connector plug (outside the device), which is more effective than placing them on the inside of the device (on the socket), and can more directly intercept noise, preventing noise from entering the device and affecting the communication performance of devices such as AAU.

[0031] (2) Existing technologies often face limitations due to the small space of the connector when attempting to add filtering components. This invention achieves efficient space utilization through optimized layout: on the one hand, the width of the capacitor placement slot on the insulating shell is comparable to the width of the capacitor, stably accommodating the capacitor within a limited space; on the other hand, the semi-circular slot between the two slots of the insulating shell provides a fixed space for pin shorting, avoiding space waste caused by messy pins. This design allows the capacitor, contact, and shielding sheet to be integrated in an orderly manner within a small space, achieving improved electromagnetic compatibility performance without increasing the connector volume.

[0032] (3) In the prior art, if the capacitor and other components 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, after the capacitor is placed in the placement tank, it is potted and cured to completely avoid the capacitor shaking due to vibration during use and prevent the pins from breaking due to force. Second, a clearance area is set below the solder joints of the capacitor and the contact to provide buffer space for the capacitor pins (the hard area connected to the body) and prevent the pins from breaking due to excessive bending stress. Third, the bent part of the contact provides a reasonable operating position for welding, and the cup-shaped opening facilitates the accumulation of solder, ensuring that the solder joints are firm and reducing the risk of poor soldering and desoldering.

[0033] (4) In this invention, the second pins of the two capacitors are short-circuited internally before being soldered to the shielding sheet, which reduces the number of external soldering points, making the product look neater and more beautiful, and at the same time reducing the risk of loosening of external soldering points.

[0034] (5) In this invention, there is a gap between the plastic shell and the shielding pin, which can block the heat transfer during welding, prevent the plastic shell from deforming or aging due to high temperature, and extend the service life of the connector.

[0035] (6) This invention does not require a complex fully enclosed metal shielding structure (which is costly and not suitable for on-site wiring). Instead, it improves performance based on existing rectangular connectors by integrating low-cost Y-type safety capacitors and optimizing structural design. It takes into account both low cost and high electromagnetic compatibility performance and is suitable for communication outdoor power supply application scenarios.

[0036] (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 interruption and data transmission delay. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the shielding structure in this invention.

[0039] Figure 2 This is one of the structural schematic diagrams of an insulator.

[0040] Figure 3 This is the second schematic diagram of an insulator.

[0041] Figure 4 This is a schematic diagram of the structure of the insulator and the contact.

[0042] Figure 5 This is a structural schematic diagram of the contact element.

[0043] Figure 6 It is a structural diagram of insulators, capacitors and contacts.

[0044] Figure 7 This is a schematic diagram of the connector structure.

[0045] Figure 8 This is a cross-sectional view of the connector.

[0046] The diagram shows the following markings: 1. Plastic housing; 2. Positive contact; 3. Negative contact; 4. Combined pins; 5. Shielding sheet; 501. Bent pin; 6. Insulator; 601. Pin clearance area; 602. Placement slot; 6021. First placement slot; 6022. Second placement slot; 603. Semicircular slot; 604. Divider plate; 605. Mounting hole; 7. Pin protrusion hole; 8. Bend; 9. First capacitor; 10. Second capacitor; 11. First pin; 12. Second pin. Detailed Implementation

[0047] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0048] In the description of this invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting the scope of protection of this invention.

[0049] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0050] This invention discloses an electromagnetic compatibility shielding structure and an electromagnetic shielding connector. By integrating two capacitors inside the connector, a DC path and a noise discharge path of "contact-capacitor-shielding sheet" are constructed. The high-frequency characteristics of the capacitor are used to provide a low-impedance discharge path for common-mode noise. Combined with the optimized structural design, the defects of the prior art are solved.

[0051] First, the electromagnetic compatibility (EMC) shielding structure will be explained. Please refer to [link / reference]. Figures 1 to 6 The specific structure includes four core components: an insulating shell, two capacitors, two contacts, and a shielding sheet.

[0052] <Insulating Housing>

[0053] The insulating housing includes a plastic housing 1 and an insulator 6.

[0054] Please refer to Figure 1 The plastic housing 1 serves as the outer protective layer of the entire structure. It is injection molded from weather-resistant engineering plastics (such as PBT) and has an overall rectangular box-like structure, possessing certain structural strength and waterproof performance, making it suitable for outdoor power supply environments. Internally, it has an installation cavity that matches the shape of the insulator 6. Positioning bosses are provided on the inner side of the cavity wall to axially and radially limit the insulator 6, ensuring that the insulator 6 is stably embedded within the plastic housing 1 without loosening.

[0055] One side wall of the plastic housing 1 (located on the same side as the insertion end of the contact, specifically the side where the contact pin / hole protrudes) is provided with a through-hole 7 for the lead. The number of holes matches the total number of the second leads 12 of the capacitor. Generally, two are required. Preferably, when the second leads 12 of the first capacitor 9 and the second capacitor 10 are short-circuited in the insulator 6 and then protrude, only one through-hole is needed. The diameter of the hole is slightly larger than the diameter of the lead, which facilitates the lead passing through and avoids excessive gaps that could lead to the intrusion of dust or moisture.

[0056] Please refer to Figures 2 to 4 The insulator 6 is made of a plastic material with excellent insulating properties (such as PA66) and is integrally embedded in the mounting cavity of the plastic housing 1. It is fixed by cooperating with the positioning boss on the inner wall of the plastic housing 1. The insulator 6 has two independent placement slots 602 (first placement slot 6021 and second placement slot 6022) along its length. The two slots are separated by a partition plate 604 to ensure electrical insulation between the positive contact 2 and the negative contact 3.

[0057] The first placement slot 6021 and the second placement slot 6022 are used to accommodate the first capacitor 9 and the second capacitor 10, respectively. The width of the placement slot 602 (usually rectangular) is approximately equal to the width of the capacitor body to reduce lateral movement after installation. The length and depth of the placement slot 602 match the size of the capacitor to ensure stable embedding of the capacitor body. After the capacitor is placed in the placement slot 602, a space is reserved inside the slot for injecting adhesive. After the adhesive cures, it forms an elastic support, preventing lead breakage or solder joint detachment due to vibration during use.

[0058] The insulator 6 has two mounting holes 605, which are used to mount the positive contact 2 and the negative contact 3, respectively. The mounting holes 605 are interference-fitted with the shape of the contacts to ensure that there is no axial movement after the contacts are inserted.

[0059] Grooves are formed on the sidewalls of the adjacent mounting holes 605 in both the first placement groove 6021 and the second placement groove 6022, creating pin clearance areas 601. The position of these grooves corresponds to the welding area between the capacitor pins and the bent portion 8 on the contact. Since the connection area between the capacitor pins and the capacitor body is hardened and has high brittleness, the pin clearance area 601 prevents the pins from breaking due to bending stress and provides space for welding operations. The mounting hole 605 for mounting the positive contact 2 is connected to the first placement groove 6021 via the pin clearance area 601. The mounting hole 605 and the pin clearance area 601 are axially offset. After the positive contact 2 is installed into the mounting hole 605, its L-shaped bent portion 8 extends from the mounting hole 605 to above the pin clearance area 601. The mounting hole 605 for mounting the negative contact 3 is connected to the second placement groove 6022, and the bent portion 8 of the negative contact 3 extends to above the pin clearance area 601 in the second placement groove 6022. This design provides a stable and easy-to-operate soldering platform for the first pin 11. Without this bending structure, the capacitor pin might need to be soldered directly to the contact body, which would be difficult to operate in a confined space, and the reliability and consistency of the solder joints would be hard to guarantee.

[0060] The insulator 6 has a lead through hole 7, through which the second lead 12 or the combined lead 4 of the capacitor can pass to the outside and connect to the shield 5. The position of the lead through hole 7 corresponds to the bent lead 501 of the shield 5, ensuring that the lead can be directly soldered to the shield 5 after passing through.

[0061] The top of the partition plate 604 has a semi-circular groove 603 for placing and fixing the second pin 12 of the capacitor. The curvature of the semi-circular groove 603 matches the diameter of the second pin 12, ensuring that the second pin 12 will not wobble when passing through the two cavities, and at the same time avoiding damage to the insulation layer caused by friction between the second pin 12 and the partition plate 604. The semi-circular groove 603 can hold the second pin 12 of either the first capacitor 9 or the second capacitor 10, depending on the actual situation (such as the setting position of the pin protrusion hole 7, the length of the pin, etc.).

[0062] <Positive contact 2 and negative contact 3>

[0063] Both the positive contact 2 and the negative contact 3 are made of copper alloy. They have the same structure but are installed in independent positions. Both the positive and negative contacts 2 and 3 are provided with pins / holes, with the end containing the pin / hole defined as the insertion end. The structural design of the positive and negative contacts 2 and 3 is optimized for soldering to capacitor leads. A bent portion 8 is integrally formed in the middle of the contact, which can be soldered and fixed to the first lead 11 of the capacitor. The bent portion 8 has an overall L-shaped structure, formed by extending from the edge of the contact body perpendicular to the insertion direction and then bending towards the corresponding placement groove 602, thus suspending it above the lead clearance area 601. The bent portion 8 keeps the soldering position between the contact and the capacitor lead away from the insertion / removal area of ​​the contact, avoiding the insertion / removal 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, and its bent portion 8 extends towards the first placement groove 6021 (the cavity 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, and its bent portion 8 extends towards the second placement groove 6022 (the cavity where the second capacitor 10 is located). The bent portions of the two contacts do not intersect each other, ensuring no electrical interference between the positive and negative terminals. The ends of the contacts are provided with pins or sockets for power plugging and unplugging (adapted to a connector).

[0064] A round hole is provided on the bent part 8 to facilitate the passage of the first lead 11 of the capacitor; the opening of the round hole is designed with a cup-shaped structure, which can accommodate more solder during welding, thereby improving the mechanical strength and electrical conductivity of the solder joint.

[0065] The soldering position (hereinafter referred to as "capacitor solder joint position") between the negative contact 3 and the first pin 11 of the second capacitor 10 is set away from the semicircular groove 603 on the partition plate 604. This layout is achieved by the following design: along the insertion direction of the contact, the semicircular groove 603 is close to the front end area of ​​the placement groove 602 (close to the insertion end), while the solder joint between the first pin 11 of the capacitor and the L-shaped bend 8 is close to the rear end area of ​​the placement groove 602 (away from the insertion end). There is an axial distance between the two along the insertion direction. This axial distance design completely avoids accidental contact between the pin at the solder joint and the second pin 12 at the semicircular groove 603.

[0066] <Shielding Plate 5>

[0067] The shielding sheet 5 is made of a highly conductive elastic material (such as phosphor bronze) and is stamped. It includes a main shielding surface and a surrounding structure. The main shielding surface covers the rear end surface of the plastic shell 1. The surrounding structure extends forward beyond the plastic shell 1 and surrounds at least part of the outside of the positive electrode contact 2 and the negative electrode contact 3, forming a semi-enclosed structure for part of the positive electrode contact 2 and the negative electrode contact 3 to enhance the shielding effect. On the main shielding surface of the shielding sheet 5 (the plane covering the rear end surface of the plastic shell 1), a bent pin 501 is integrally stamped to the position corresponding to the pin protrusion hole 7 of the plastic shell 1. The bent pin 501 first extends from the main shielding surface in the direction of the insertion end of the contact, and then bends 90° in the direction perpendicular to the insertion of the contact (i.e., perpendicular to the direction of the pin / hole protrusion) towards the side wall of the plastic shell 1, finally forming an L-shaped structure.

[0068] The bent lead 501 is used for soldering to the second lead 12 of the capacitor or the combined lead 4 formed by shorting two second leads 12. The bent lead 501 has a round hole to facilitate the lead passing through, and its structure is consistent with the cup-shaped hole at the opening of the round hole on the contact, which facilitates solder accumulation during soldering and ensures a reliable connection with the capacitor lead. A heat insulation gap of 1.0±0.1mm is reserved between the bent lead 501 of the shielding sheet 5 and the plastic shell 1. This heat insulation gap can block the heat transfer to the plastic shell 1 during soldering and prevent the plastic from melting and deforming due to high temperature.

[0069] Meanwhile, the shielding sheet 5 has a snap-fit ​​structure on its side, which cooperates with the slot on the outside of the plastic housing 1 to realize the detachable fixing of the shielding sheet 5 on the plastic housing 1 (or fastening with screws, depending on the assembly requirements), ensuring the relative position of the shielding sheet 5 and the plastic housing 1 is stable.

[0070] <First capacitor 9 and second capacitor 10>

[0071] The first capacitor 9 is installed in the first placement slot 6021, and the capacitor body is fixed in the slot by potting glue to prevent the capacitor from shifting due to vibration; the second capacitor 10 is installed in the second placement slot 6022, and the fixing method is the same as that of the first capacitor.

[0072] Both the first capacitor 9 and the second capacitor 10 include a capacitor body and two pins connected to the capacitor body. The connection relationship between the capacitor, the contact, and the shielding sheet is as follows:

[0073] Connection with the 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 the electrical connection between the capacitor and the positive and negative conductors.

[0074] Connection with shielding sheet 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 exit hole 7 of the insulator 6, and are then soldered to the bent pin 501 of the shielding sheet 5 to achieve electrical connection between the capacitor and the shielding sheet, thereby constructing a noise discharge path of "positive / negative contact → capacitor → shielding sheet". Preferably, in order to reduce external soldering points and achieve 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 combined pin 4. The combined pin 4 passes through the pin exit hole 7 of the insulator 6 and the plastic shell 1 in sequence, and is finally inserted into the cup-shaped soldering hole of the bent pin 501 on the shielding sheet 5. It is then fixed by soldering to achieve conductive connection between the two capacitors and the shielding sheet.

[0075] 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 leveraging their low impedance characteristics to high-frequency signals, they create a dedicated low-impedance conduction path for high-frequency common-mode noise, causing noise current to be guided to the ground line through the capacitor, rather than intruding into the load or radiating outwards.

[0076] 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 + shielding grounding" without affecting the normal transmission of DC or low-frequency power signals, as detailed below:

[0077] (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 to the load along the contacts, and the two do not interfere with each other.

[0078] (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 shorting) conduct the collected noise signal to the shielding plate 5. Since the shielding plate 5 is connected to the metal casing of the equipment (or the grounding terminal), the noise is finally discharged to the ground through the shielding plate 5, preventing the noise from interfering with other equipment through spatial radiation or conductor coupling.

[0079] (3) The semi-enclosed structure of the shielding sheet 5 can block electromagnetic interference from the external environment from entering the contact and capacitor, and can also prevent noise that has not been completely discharged from radiating to the outside. It complements the noise discharge function of the capacitor and further improves the overall electromagnetic compatibility performance.

[0080] Next, the specific structure of the electromagnetic shielding connector will be described. Please refer to [link / reference needed]. Figure 7 and Figure 8 The connector includes the aforementioned shielding structure.

[0081] 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) is more effective than placing it on the inside of the device (i.e., on the connector socket). This is because the former can intercept and divert noise before it enters the device, reducing noise interference to the core components of the device from the source.

[0082] The conductive path of the connector is as follows: 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 for high-frequency common-mode noise from the positive and negative terminals to the shielding plate.

[0083] In summary, the electromagnetic compatibility shielding structure and electromagnetic shielding connector of the present invention effectively solve the problems of insufficient EMI performance and excessively high grounding path impedance in the prior art through innovative capacitor integration design, optimized structural layout and reliable connection method. At the same time, it improves mechanical reliability and cost advantages, and is suitable for outdoor environments with stringent electromagnetic compatibility requirements for core equipment such as AAU.

[0084] The electromagnetic compatibility shielding structure and electromagnetic shielding connector provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and specific implementation methods of the present invention. The above embodiments are only used to help understand the method and core ideas of the present invention. It should be noted that for those skilled in the art, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. An electromagnetic compatibility shielding structure, characterized in that, include: An insulating housing, wherein the insulating housing has a receiving cavity; Two contacts, including a positive contact (2) and a negative contact (3), are installed in the receiving cavity; A shielding plate (5) is mounted on an insulating housing. The shielding plate (5) includes a main shielding surface covering the rear end surface of the insulating housing and a bent pin (501) connected to the main shielding surface. The bent pin (501) extends from the main shielding surface toward the insertion end of the contact and is bent in a direction perpendicular to the insertion direction of the contact in the direction surrounding the insulating housing. The first capacitor (9) and the second capacitor (10) are located in the cavity. Each capacitor includes a capacitor body and two pins connected to the capacitor body. The first pin (11) of the first capacitor (9) is connected to the positive contact (2), and the first pin (11) of the second capacitor (10) is connected to the negative contact (3). The second pin (12) of the first capacitor (9) and the second pin (12) of the second capacitor (10) are electrically connected to the shielding sheet (5), thereby realizing the conduction between the two contacts and the shielding sheet (5).

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

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

4. The electromagnetic compatibility shielding structure according to claim 3, characterized in that, The dimensions of the placement groove (602) are matched with the dimensions 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 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 extends in the same direction as the plug end of the contact, and is welded and fixed to the bent pin (501) on the shield (5).

6. The electromagnetic compatibility shielding structure according to claim 5, characterized in that, The partition plate (604) is provided with a semi-circular groove (603) for placing the second pin (12) of the first capacitor (9) or the second capacitor (10).

7. The electromagnetic compatibility shielding structure according to claim 6, characterized in that, Both the positive electrode contact (2) and the negative electrode contact (3) have a bent portion (8) in the middle, and the first pin (11) is welded and fixed to the bent portion (8).

8. The electromagnetic compatibility shielding structure according to claim 7, characterized in that, The placement slot (602) is provided with a pin clearance area (601) for accommodating the first pin (11) so that the first pin (11) can be welded to the bent part (8).

9. The electromagnetic compatibility shielding structure according to claim 8, characterized in that, The semicircular groove (603) is located near the plug end, while the pin clearance area (601) is located away from the plug end, and there is a gap between the two in the plugging direction.

10. An electromagnetic compatibility shielding structure according to claim 7, characterized in that, The insulating housing is provided with a pin protrusion hole (7) for the second pin (12) or the combined pin (4) to protrude.

11. The electromagnetic compatibility shielding structure according to claim 10, characterized in that, A round hole is opened on the bent part (8) or the bent pin (501), and the corresponding pin passes through the round hole and is welded and fixed to the inner wall of the round hole.

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

13. An electromagnetic shielding connector, characterized in that, Includes the electromagnetic compatibility shielding structure as described in any one of claims 1-12.

14. An electromagnetic shielding connector according to claim 13, characterized in that, The connector includes a plug and a socket, and the electromagnetic compatibility shielding structure is provided on the plug.

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