Inductance device

Abstract

The utility model discloses an inductance device which comprises an inductance base, a PCB, a first pin and a second pin, the first pin and the second pin are both connected to the inductance base and the PCB, and a discharge air gap is formed between the first pin and the second pin. According to the inductance device provided by the utility model, the discharge gap is formed between the first pin and the second pin, and the discharge channel is constructed by skillfully utilizing the structure of the pins, so that no additional discharge needle is needed, and the discharge function is not influenced by factors such as the layout wiring space of a PCB (Printed Circuit Board) and the coverage of heat dissipation glue; and the first pin and the second pin are connected to the inductor base and the PCB, so that a stable mechanical connection structure and an electrical connection structure are formed between the inductor base and the PCB, the overall mechanical stability of the inductor device is enhanced, and the performance stability of a whole circuit system is improved.

Description

Technical Field

[0001] This utility model relates to the field of inductance technology, and in particular to an inductor device. Background Technology

[0002] In the field of electronic circuits, inductors are indispensable key components, and their performance and reliability play a crucial role in the stable operation of the entire circuit system. However, traditional inductors have significant shortcomings and limitations in discharge-related design.

[0003] Traditional inductor base pins typically use a straight pin configuration with fixed and relatively large pin spacing, making it difficult to directly achieve tip discharge functionality. To address the issue of electrostatic energy release during overvoltage, additional discharge pins are often added to the PCB layout to create a discharge channel. However, in practical applications, several challenging problems arise. Firstly, PCB space is limited; complex circuit layouts and routing requirements severely restrict the placement of discharge pins. In some cases, there isn't even enough space around the inductor to install discharge pins, hindering comprehensive and effective discharge and creating safety hazards when the circuit faces various overvoltage conditions.

[0004] On the other hand, thermal paste is added to dissipate heat from some inductors. However, this thermal paste can easily get onto the discharge pins during use. If this happens, the original discharge function of the discharge pins will be greatly reduced or even completely lost, which will prevent the entire inductor from discharging overvoltage normally. This seriously affects the reliability of the product and greatly increases the possibility of circuit failure due to overvoltage. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the prior art and provide an inductor device.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This utility model provides an inductor device, including: an inductor base, a PCB board, a first pin and a second pin, wherein the first pin and the second pin are both connected to the inductor base and the PCB board, and a discharge gap is formed between the first pin and the second pin.

[0008] In one embodiment, the first pin and the second pin are respectively provided with a first discharge terminal and a second discharge terminal, the first discharge terminal and the second discharge terminal are arranged facing each other, and the discharge gap is formed between the first discharge terminal and the second discharge terminal.

[0009] In one embodiment, the first pin includes a first connecting portion and a second connecting portion connected to the first connecting portion; the second pin includes a third connecting portion and a fourth connecting portion connected to the third connecting portion; both the first connecting portion and the third connecting portion are connected to the inductor base; both the second connecting portion and the fourth connecting portion are connected to the PCB board.

[0010] In one embodiment, the first discharge terminal is disposed at one end of the first connection portion near the third connection portion, and the second connection portion is connected to the other end of the first connection portion; the second discharge terminal is disposed at one end of the third connection portion near the first connection portion, and the fourth connection portion is connected to the other end of the third connection portion.

[0011] In one embodiment, the inductor base is provided with a first groove, and the first pin and the second pin are respectively located on opposite sides of the first groove.

[0012] In one embodiment, the inductor base further comprises a first mounting slot and a second mounting slot; the first mounting slot, the first groove, and the second mounting slot are sequentially connected; the first connecting portion is installed in the first mounting slot, the first discharge end and the second connecting portion both extend out of the first mounting slot, and the first discharge end is located in the first groove; the third connecting portion is installed in the second mounting slot, the second discharge end and the fourth connecting portion both extend out of the second mounting slot, and the second discharge end is also located in the first groove.

[0013] In one embodiment, the number of both the first pin and the second pin is at least one.

[0014] In one embodiment, there are two first pins and two second pins, and the inductor base is provided with a second groove; the second groove is located between the two first pins and between the two second pins.

[0015] In one embodiment, the distance between the first discharge end and the second discharge end is 0.1 to 0.5 mm.

[0016] In one embodiment, both the first discharge end and the second discharge end are tapered; or both the first discharge end and the second discharge end are arc-shaped; or both the first discharge end and the second discharge end are serrated.

[0017] The advantages of this inductor device compared to existing technologies are as follows: By forming a discharge gap between the first and second pins, the discharge channel is cleverly constructed using the pins' own structure, eliminating the need for additional discharge pins and avoiding the impact of PCB layout space and thermal paste coverage on the discharge function. Furthermore, both the first and second pins are connected to the inductor base and the PCB board, ensuring a stable mechanical and electrical connection between the inductor base and the PCB board. This enhances the overall mechanical stability of the inductor device and improves the performance stability of the entire circuit system.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 The inductor device provided by this utility model adopts a plug-in common-mode structure. Figure 1 ;

[0021] Figure 2 The inductor device provided by this utility model adopts a plug-in common-mode structure. Figure 2 ;

[0022] Figure 3 The inductor device provided by this utility model adopts a plug-in common-mode structure. Figure 3 ;

[0023] Figure 4 Provided by this utility model Figure 3 A schematic diagram of the structure of A in the middle;

[0024] Figure 5 A schematic diagram of the surface-mount common-mode inductor device provided by this utility model;

[0025] Figure 6 A schematic diagram of the plug-in differential mode inductor device provided by this utility model;

[0026] Figure 7 A schematic diagram of the plug-in differential mode type structure of the inductor base provided by this utility model;

[0027] Figure 8The inductor device provided by this utility model adopts a surface-mount differential mode structure.

[0028] 1. Inductor base; 11. First groove; 12. First mounting slot; 13. Second mounting slot; 14. Communicating point; 15. Protrusion; 16. Second groove; 2. First pin; 21. First discharge terminal; 22. First connecting part; 23. Second connecting part; 3. Second pin; 31. Second discharge terminal; 32. Third connecting part; 33. Fourth connecting part. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; 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; they can refer to a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0036] See Figures 1 to 8 As shown, this utility model provides an embodiment of an inductor device, including: an inductor base 1, a PCB board (not shown in the figure), a first pin 2 and a second pin 3. The first pin 2 and the second pin 3 are both connected to the inductor base 1 and the PCB board, and a discharge gap is formed between the first pin 2 and the second pin 3.

[0037] Specifically, in this embodiment, the inductor directly forms a discharge gap between the first pin 2 and the second pin 3, cleverly utilizing the structure of the pin itself to construct a discharge channel, so that the pin has both connection and discharge functions, without relying on additional discharge pins as in the traditional method. Therefore, the inductor in this embodiment does not need to occupy the already tight layout and wiring space to set up discharge pins separately, so that the discharge pins (the first pin 2 and the second pin 3 in this application) are not limited by the PCB layout and wiring space, and can stably realize the discharge function based on the discharge gap between the pins. In this design, the pins act as discharge needles, positioned between the inductor base 1 and the PCB board. The thermal adhesive's primary function is to dissipate heat from the inductor's main body. During normal use, the thermal adhesive is applied to areas prone to heat accumulation, such as the inductor body, without substantially interfering with the connection point of the pins (discharge needles) or the resulting discharge gap. Therefore, in this embodiment, as long as the pin connection is normal, the discharge gap can continue to function, providing a discharge path for overvoltage conditions such as electrostatic energy. The thermal adhesive coverage does not affect the discharge function, ensuring reliable discharge of the inductor under various heat dissipation conditions. Furthermore, the design of both the first pin 2 and the second pin 3 connecting the inductor base 1 and the PCB board not only allows the pins to perform the discharge function but also strengthens the connection stability between the inductor base 1 and the PCB board from a physical structure perspective. This ensures a good electrical connection even under different operating environments, such as equipment movement and vibration, preventing problems like open circuits and signal transmission interruptions. This helps extend the lifespan of the inductor and the entire circuit system, ensuring that the inductor continues to function stably in the circuit, such as electromagnetic induction and filtering, further improving the performance stability of the entire circuit system and providing strong support for various electronic circuit applications, especially in scenarios with stringent electrical safety and performance requirements.

[0038] See Figures 1 to 6 and Figure 7 As shown, in a specific embodiment, the first pin 2 and the second pin 3 are respectively provided with a first discharge terminal 21 and a second discharge terminal 31, the first discharge terminal 21 and the second discharge terminal 31 are arranged facing each other, and a discharge gap is formed between the first discharge terminal 21 and the second discharge terminal 31.

[0039] Specifically, when the inductor is operating normally and there is no overvoltage, the first discharge terminal 21, the second discharge terminal 31, and the discharge gap between them are in a relatively stable electrical insulation state. The inductor base 1 is electrically connected to other circuit components on the PCB board through the first pin 2 and the second pin 3, participating in conventional circuit functions such as electromagnetic induction and filtering. At this time, the discharge gap does not play a discharge role, and the entire circuit system operates normally according to the predetermined design. When an overvoltage occurs in the circuit due to various reasons (such as static electricity accumulation, external electromagnetic interference, etc. leading to abnormal voltage rise), the electric field strength in the discharge gap region between the first discharge terminal 21 and the second discharge terminal 31 is enhanced due to the opposing discharge terminals. The air and other media in the discharge gap are ionized under the action of the high electric field strength, forming a conductive channel (i.e., a discharge channel). The energy generated by static electricity and other overvoltages will be discharged to the external environment or a safe potential such as grounding in the circuit through the discharge channel formed by this discharge gap, thereby avoiding damage to sensitive components in the circuit by overvoltage and ensuring the safe and stable operation of the circuit system.

[0040] This embodiment uses the tip effect to concentrate the electric field by setting the first discharge terminal 21 and the second discharge terminal 31 on the first pin 2 and the second pin 3 respectively, and arranging them facing each other. When an overvoltage occurs in the circuit, such as when high voltage is generated by static electricity accumulation, the electric field strength will be significantly enhanced in the area between the two opposing discharge terminals due to their relatively close distance and special shape (discharge terminals are usually designed with a relatively sharp shape to enhance the tip effect). The discharge gap is located between these two discharge terminals, and this enhanced electric field can be used to guide the energy generated by overvoltage such as static electricity to be preferentially discharged through the discharge channel formed by this gap. Compared with the traditional large-area, non-directional discharge method, it is more directional and efficient, which is in line with the design intention of optimizing the discharge path and improving the discharge efficiency. In addition, the first pin 2 and the second pin 3 themselves serve the function of connecting the inductor base 1 and the PCB board. The first discharge terminal 21 and the second discharge terminal 31 extended on this basis are a further expansion of the pin functions. By cleverly constructing the discharge terminal on the pin structure, the discharge function is closely integrated with the conventional electrical connection and mechanical fixing function of the inductor. This avoids adding complex structural components and makes full use of the existing pin layout. Overall, it realizes the design concept of compact structure and integrated function, ensuring that the inductor device has reliable discharge capability while meeting the basic circuit connection requirements.

[0041] In one specific embodiment, the distance between the first discharge end 21 and the second discharge end 31 is 0.1 to 0.5 mm.

[0042] Specifically, the distance between the first discharge terminal 21 and the second discharge terminal 31 is the length of the discharge gap. When the circuit is operating normally and no overvoltage occurs, the 0.1–0.5 mm gap keeps the first discharge terminal 21 and the second discharge terminal 31 insulated. Air or other media filling the gap prevent current from flowing through. The inductor participates normally in the electrical connection and corresponding functions of the circuit through its pins, such as performing electromagnetic induction and filtering. The entire circuit system operates stably, and the discharge gap does not play a discharge role. When the circuit experiences overvoltage due to static electricity accumulation, power surges, or other reasons, the electric field strength between the first discharge terminal 21 and the second discharge terminal 31 continuously increases with the voltage. Since the length of the discharge gap is within the suitable range of 0.1–0.5 mm, under relatively low overvoltage conditions, the electric field strength is sufficient to ionize the air or other media in the discharge gap, generating plasma and forming a conductive channel, i.e., opening the discharge channel. The energy generated by static electricity and other overvoltages begins to dissipate through this narrow discharge gap, releasing excess energy to the external environment or a safe potential such as grounding in the circuit. Once a discharge channel is formed, the energy generated by the overvoltage will continuously be released through the discharge gap. As the energy is released, the voltage in the circuit gradually returns to normal. When the voltage drops to a certain level, making the electric field strength between the discharge gaps insufficient to maintain the ionization state of media such as air, the discharge channel closes, and the discharge gaps return to an insulating state, waiting for the next possible overvoltage situation. The inductor continues to participate in the normal operation of the circuit.

[0043] This embodiment selects a relatively small spacing range of 0.1 to 0.5 mm, based on the ionization characteristics of media such as air under a certain electric field strength and the overvoltage situation in the actual application of inductors. At this spacing, when an overvoltage occurs in the circuit, the electric field strength between the first discharge terminal 21 and the second discharge terminal 31 can relatively easily reach the level required to ionize the air, thereby quickly forming a discharge channel to release energy. Simultaneously, the smaller spacing avoids the need for excessively high electric field strength to trigger discharge due to excessive distance, ensuring reliable triggering of the discharge function within common overvoltage ranges and guaranteeing the electrical safety of the inductor. Overvoltage situations in electronic circuits, such as abnormal voltage amplitudes caused by static electricity accumulation and power fluctuations, are typically within a certain range. This spacing range was determined after extensive experimentation and actual circuit testing, matching the overvoltage amplitudes that may occur in most electronic circuits. This allows the discharge terminals to initiate the discharge process in a timely manner when facing these common overvoltage scenarios, effectively handling overvoltage energy and preventing damage to circuit components from excessive voltage, thus meeting the functional requirements of inductors in general electronic circuit applications.

[0044] More specifically, inductors with different discharge gap lengths can be used depending on the actual application scenario. For some special applications, such as electronic devices in high electrostatic environments (like electronic instruments in textile workshops where static electricity easily accumulates), inductors with a discharge gap length close to 0.1 mm can be used to enhance discharge sensitivity, enabling rapid discharge even under low overvoltage conditions, further improving the ability to dissipate static electricity and better protecting circuit components. Conversely, in circuits with slightly lower discharge sensitivity requirements but higher stability requirements (such as certain high-precision measuring instrument circuits), the discharge gap length of the inductor can be appropriately increased to close to 0.5 mm to reduce the possibility of accidental discharge triggered by occasional small voltage fluctuations, ensuring the accuracy and stability of circuit measurements.

[0045] It is understood that in other embodiments, the distance between the first discharge terminal 21 and the second discharge terminal 31 may be set to other values ​​depending on the actual application.

[0046] In one specific embodiment, the first discharge end 21 and the second discharge end 31 are both tapered; or the first discharge end 21 and the second discharge end 31 are both arc-shaped; or the first discharge end 21 and the second discharge end 31 are both serrated.

[0047] Specifically, when the first discharge terminal 21 and the second discharge terminal 31 adopt a conical design, it is mainly based on the principle of the tip effect. The radius of curvature of the tip of the cone is extremely small, and under the same voltage, the electric field strength on its surface is significantly enhanced compared to other shapes. According to electric field theory, the electric field strength is inversely proportional to the radius of curvature of the object's surface. This characteristic of the conical tip makes the electric field highly concentrated there, making it easier to ionize the surrounding medium such as air. Thus, discharge can be triggered even under relatively low overvoltage conditions, providing an efficient discharge path for overvoltage energy such as static electricity, optimizing the discharge performance of the inductor, and meeting the design intention of efficient discharge and ensuring circuit safety. When an overvoltage occurs, as the voltage increases, the electric field strength at the tip of the cone increases rapidly. Due to its tip effect, under relatively low overvoltage amplitude, the medium such as air near the tip will be ionized first, forming a plasma conductive channel. The energy generated by the overvoltage flows from one discharge terminal to the other along this discharge channel initiated by the tip, realizing energy discharge until the voltage returns to normal and the discharge channel closes.

[0048] When the first discharge terminal 21 and the second discharge terminal 31 are arranged in an arc shape, the arc-shaped surface allows the electric field to be distributed relatively uniformly around it. Unlike sharp shapes, the arc shape does not have a point with an extremely small radius of curvature, but guides the electric field with a relatively gentle curve. This avoids the electric field from being excessively concentrated at a certain point, which could lead to premature or unstable partial discharge. At the same time, compared with a simple planar structure, the arc shape increases the contact area with the surrounding medium, providing more channels to guide the release of overvoltage energy during discharge. This improves the overall stability and efficiency of the discharge, making it suitable for applications requiring relatively stable and large-area discharge. When an overvoltage occurs in the circuit, the electric field intensity around the arc-shaped discharge terminal rises uniformly. When it reaches the critical value for ionizing the medium, the medium such as air around the arc-shaped surface will simultaneously begin to ionize over a large area, forming multiple relatively dispersed but continuous discharge channels. The overvoltage energy is released uniformly and stably through these channels, ensuring the smoothness of the discharge process and avoiding adverse effects caused by excessive partial discharge intensity. After the voltage drops, the discharge stops and the circuit returns to normal.

[0049] When the first discharge terminal 21 and the second discharge terminal 31 are arranged in a sawtooth shape, the sawtooth discharge terminal contains multiple protruding "teeth," each of which can be regarded as a small tip, which is equivalent to creating multiple electric field distortion points. Under overvoltage conditions, the electric field intensity at these electric field distortion points will be enhanced, making it easier for dielectrics such as air to be ionized simultaneously at multiple locations, forming multiple discharge paths. This multi-path discharge method can greatly improve the discharge speed and efficiency, quickly dispersing and releasing the energy generated by overvoltage. It is especially suitable for circuit environments where high-amplitude overvoltages may occur and rapid processing is required, enhancing the inductor's ability to cope with complex overvoltage situations. When encountering overvoltage, the electric field intensity at each "teeth" increases sharply. Due to the combined action of multiple "teeth," the dielectric will be ionized simultaneously at multiple locations, rapidly forming multiple discharge paths. These paths work simultaneously, allowing the overvoltage energy to be quickly and dispersedly released through the discharge gap, greatly improving the discharge efficiency and enabling timely response to high-amplitude overvoltages. After the voltage returns to normal, the discharge terminates, and the device returns to normal operation.

[0050] In this embodiment, the cone-shaped, arc-shaped, and sawtooth-shaped discharge terminal designs all optimize discharge performance from different angles. This allows for faster and more reliable dissipation of electrostatic and other overvoltage energy when facing overvoltage conditions. Compared to discharge terminals of ordinary shapes, this reduces the risk of circuit failure caused by overvoltage, effectively protects other sensitive components in the circuit, ensures stable operation of the circuit system, and enhances the overall overvoltage resistance of the inductor. Conical discharge terminals are suitable for applications requiring high discharge trigger sensitivity and expecting discharge to start at relatively low overvoltages, such as small consumer electronics circuits with strict electrostatic protection requirements. They can quickly dissipate potentially accumulated static electricity, ensuring product performance and lifespan. Semi-circular discharge terminals are more suitable for circuits requiring high discharge stability and uniform, stable discharge, such as precision measuring instrument circuits, avoiding interference with measurement accuracy due to unstable discharge. Sawtooth discharge terminals, due to their powerful multi-path discharge capability, perform exceptionally well in handling high-amplitude overvoltages requiring large amounts of energy dissipation in a short time, such as high-power motor control circuits in industrial environments, effectively preventing overvoltage damage to the circuit. This embodiment provides a variety of discharge terminal design options, allowing for flexible selection of appropriate discharge terminal shapes when designing inductor devices, taking into account factors such as specific circuit requirements, usage environment, and cost. This enhances design flexibility and product adaptability, meeting the diverse discharge performance requirements of different users and application fields.

[0051] It is understood that in other embodiments, the first discharge terminal 21 and the second discharge terminal 31 can also be configured with other shapes, and even discharge terminals of different shapes can be combined. Through this combination, the advantages of different shapes can be fully utilized, the discharge performance can be further optimized, and more complex circuit overvoltage conditions and diverse application requirements can be met. Moreover, for each shape, its specific detailed parameters can be further optimized. For example, in a conical discharge terminal, the size of the cone angle can be adjusted. A smaller cone angle can further enhance the tip effect, but it may require higher manufacturing process requirements. A suitable cone angle should be selected after weighing the actual situation. For a semi-circular discharge terminal, the radius can be changed to adjust the electric field distribution and discharge area. For a serrated discharge terminal, the number, size, and spacing of the "teeth" can be adjusted to precisely control the number of discharge paths and discharge efficiency, making the discharge performance more suitable for specific circuit application scenarios. In addition, the performance of the discharge terminal can be further improved by combining new conductive materials or surface treatment technologies. For example, using new alloy materials with high conductivity and corrosion resistance to make the discharge terminal, or applying special coating treatments to the surface of the discharge terminal (such as coating with anti-corona and anti-oxidation coatings), can enhance the working performance of the discharge terminal in complex environments (such as high temperature, high humidity, and strong corrosive environments), extend its service life, and may also have a positive impact on discharge efficiency and other aspects, thus broadening the application range of inductor devices.

[0052] In one specific embodiment, the first pin 2 includes a first connecting portion 22 and a second connecting portion 23 connected to the first connecting portion 22; the second pin 3 includes a third connecting portion 32 and a fourth connecting portion 33 connected to the third connecting portion 32; the first connecting portion 22 and the third connecting portion 32 are both connected to the inductor base 1; the second connecting portion 23 and the fourth connecting portion 33 are both connected to the PCB board.

[0053] See Figure 5 and Figure 8 As shown, specifically, when the first pin 2 and the second pin 3 adopt a surface-mount structure, the first connecting part 22 and the third connecting part 32 are respectively attached to one side of the inductor base 1, and the second connecting part 23 and the fourth connecting part 33 are respectively attached to one side of the PCB board. The surface-mount structure helps to realize the miniaturization and high-density layout of the PCB board, integrating more electronic components in a limited space, meeting the development trend of modern electronic devices that are constantly pursuing miniaturization.

[0054] See Figures 1 to 4 and Figure 6As shown, when the first pin 2 and the second pin 3 adopt a plug-in structure, the first connecting part 22 and the second connecting part 23 are connected in an L-shape; the third connecting part 32 and the fourth connecting part 33 are connected in an L-shape; the first connecting part 22 and the third connecting part 32 are set parallel to the PCB board and connected to the inductor socket; the second connecting part 23 and the fourth connecting part 33 are perpendicularly connected to the PCB board. The plug-in structure provides greater flexibility for circuit layout, allowing for reasonable arrangement of pin positions according to actual conditions, avoiding conflicts with other components or traces, and facilitating personalized layout design by designers according to different circuit functional requirements, thereby improving the freedom of circuit design and overall performance.

[0055] This embodiment offers both surface mount and through-hole pin configurations, allowing the inductor to adapt to different manufacturing processes and circuit assembly requirements. In mass production, the surface mount configuration can be efficiently and quickly installed using automated surface mount equipment, improving production efficiency and reducing costs. For small-batch production circuits requiring frequent debugging or maintenance, the through-hole configuration facilitates manual operation and component replacement, enhancing the flexibility of circuit assembly and subsequent maintenance, and meeting diverse production and usage scenarios.

[0056] In one specific embodiment, the first discharge end 21 is disposed at one end of the first connection portion 22 near the third connection portion 32, and the second connection portion 23 is connected to the other end of the first connection portion 22; the second discharge end 31 is disposed at one end of the third connection portion 32 near the first connection portion 22, and the fourth connection portion 33 is connected to the other end of the third connection portion 32.

[0057] Specifically, in this embodiment, the first pin 2 and the second pin 3 adopt a plug-in structure. This connection method allows the first pin 2 and the second pin 3 to be arranged more spaciously and orderly in space, avoiding excessive crowding of the connection parts and helping to achieve a more optimized overall circuit space planning. From a mechanical structure perspective, when the second connection part 23 is connected to the end of the first connection part 22 away from the third connection part 32, and the fourth connection part 33 is connected to the end of the third connection part 32 away from the first connection part 22, the resulting L-shaped (taking the plug-in structure as an example) or similar stable structural form has a more uniform and reasonable force distribution, which can better disperse the force and reduce the probability of loosening or deformation due to excessive local force on the pins. This ensures the stability of the connection between the pins and the inductor base 1 and the PCB board, thereby ensuring the reliable installation and long-term stable operation of the inductor device in the entire circuit system. At the same time, this connection position setting extends the current conduction path inside the pins, which can buffer and regulate the current to a certain extent, helping to reduce the rate of current change and reduce adverse effects such as electromagnetic radiation caused by sudden current changes. Meanwhile, the relatively distant connection method makes the current flow direction and distribution within the pins more regular, which helps to reduce problems such as local overheating and electromagnetic interference that may be caused by current concentration in local areas, improves the stability of the inductor in terms of electrical performance, and ensures that it can more accurately perform electromagnetic induction, filtering and other functions in the circuit.

[0058] In one specific embodiment, the inductor base 1 is provided with a first groove 11, and the first pin 2 and the second pin 3 are respectively located on opposite sides of the first groove 11.

[0059] Specifically, the first groove 11 is positioned perpendicular to the length direction of the first connecting portion 22 and the third connecting portion 32. From an electrical isolation perspective, placing the first pin 2 and the second pin 3 on opposite sides of the first groove 11, the physical gap formed by the first groove 11 enhances the electrical isolation between the first pin 2 and the second pin 3 to a certain extent. During circuit operation, especially when processing high-frequency signals or facing complex electrical conditions such as overvoltage, good electrical isolation helps reduce potential electromagnetic coupling interference and leakage between pins, ensuring that the current carried by each pin can be transmitted stably along a predetermined path. This maintains the normal electromagnetic induction and filtering functions of the inductor, improves the stability and reliability of its electrical performance, and ensures that the inductor can function accurately in the circuit and meet the circuit's performance requirements. From an installation perspective, this structure with grooves and pins positioned on opposite sides facilitates the positioning and fixing of the pins when mounting the inductor onto a PCB board or in conjunction with other components, making the installation process more intuitive and accurate, and reducing installation errors caused by unclear pin positions. Meanwhile, the presence of the first groove 11 also creates favorable conditions for air circulation. After the inductor generates heat during operation, the heat can be exchanged with the outside air through the space around the first groove 11, which helps to dissipate heat. This is of great significance for ensuring the stability of the inductor during long-term operation and avoiding performance loss or even damage to components due to overheating. It is a clever design that takes into account both installation convenience and heat dissipation requirements.

[0060] See Figures 1 to 4 , Figure 6 and Figure 7 As shown, in a specific embodiment, the inductor base 1 is further provided with a first mounting groove 12 and a second mounting groove 13; the first mounting groove 12, the first recess 11 and the second mounting groove 13 are connected in sequence; the first connecting part 22 is installed in the first mounting groove 12, the first discharge end 21 and the second connecting part 23 both extend out of the first mounting groove 12, and the first discharge end 21 is located in the first recess 11; the third connecting part 32 is installed in the second mounting groove 13, the second discharge end 31 and the fourth connecting part 33 both extend out of the second mounting groove 13, and the second discharge end 31 is also located in the first recess 11.

[0061] Specifically, the first mounting slot 12 and the second mounting slot 13 are through slots, while the first recess 11 is an open slot. Designing the first mounting slot 12 and the second mounting slot 13 as through slots, and the first recess 11 as an open slot, is a differentiated structural design approach aimed at fully utilizing the characteristics of different slot types to meet the diverse needs of the inductor device. The through slot design of the first mounting slot 12 and the second mounting slot 13 facilitates the installation and removal of the first connecting part 22 and the third connecting part 32. Whether during the initial assembly of the pins and the inductor base 1 in the production assembly process, or subsequent maintenance and replacement operations, the through slot structure allows the pin connection to be easily inserted or removed from one end, improving operational convenience and meeting the design considerations of efficient production and easy maintenance. The open slot design of the first recess 11, by limiting its opening direction and range, can better position, protect, and control the electric field distribution of the first discharge end 21 and the second discharge end 31 located within it. Utilizing the relative enclosure of the slot, a relatively stable and predictable spatial environment is created for the discharge process, optimizing the discharge function. The interconnected structure of the through slot and the slotted section achieves efficient integration in terms of space utilization. The through slot provides sufficient extension space for the pin connection, ensuring stable installation without occupying excessive lateral space, making the overall layout of the inductor base 1 more compact and reasonable. The first groove 11 of the slotted section is concentrated in the critical discharge terminal area, satisfying the specific space requirements of the discharge function and forming a continuous airflow channel through its connection with the through slot. When the inductor generates heat during operation, air can enter along the through slot, flow through the first groove 11, and then exit from the through slot at the other end, achieving natural heat exchange, which helps dissipate heat and ensures that all components operate in a suitable temperature environment, reflecting the concept of coordinated design of space planning and heat dissipation function. Using the first groove 11 of the slotted section to place the discharge terminal enhances the electrical isolation effect. The boundary of the slot limits the range of the electric field generated by the discharge to a certain extent, avoiding interference or damage to other circuit components caused by the high electric field strength and arc generated during the discharge process, ensuring the independence and safety of the discharge function. Meanwhile, the through-slot mounting slot also ensures that the pin connection part maintains a reasonable distance and insulation state from other parts of the inductor base 1 and external circuits, reducing the probability of electrical problems such as leakage and electromagnetic coupling, ensuring the electrical safety and stable operation of the entire circuit system, and meeting the requirements for reliable operation of inductor devices in complex circuit environments.

[0062] See Figures 1 to 4 As shown, in a specific embodiment, protrusions 15 are provided on both sides of the connection 14 between the first mounting groove 12 and the second mounting groove 13, and the first discharge end 21 and the second discharge end 31 are located at both ends of the connection 14.

[0063] Specifically, protrusions 15 are provided on both sides of the connection 14 between the first mounting groove 12 and the second mounting groove 13. The purpose of these protrusions 15 is to alter the electric field distribution in this area. When an overvoltage occurs, the protrusions 15 distort the electric field at the connection 14, resulting in a localized increase in electric field strength. Since the first discharge end 21 and the second discharge end 31 are located at both ends of the connection 14, this arrangement fully utilizes the high electric field strength generated by the electric field distortion, making it easier to ionize the medium, such as air, between the discharge gaps. This quickly forms a discharge channel, guiding the energy generated by the overvoltage along the discharge gaps between the discharge ends, optimizing the discharge initiation conditions, improving discharge efficiency, and meeting the design requirement of ensuring timely and reliable discharge of the inductor during overvoltage. Furthermore, the presence of the protrusions 15 defines the spatial range of the connection 14, serving to position the first discharge end 21 and the second discharge end 31 located at its two ends. This ensures that the discharge terminal is accurately positioned during installation and subsequent use, maintaining a stable distance and relative position within the discharge gap. This prevents external factors (such as vibration and impact) from causing the discharge terminal to shift and affecting the discharge function. Simultaneously, this spatial constraint helps control the range of discharge phenomena such as electric arcs generated during the discharge process, preventing their disorderly spread and ensuring the safety and stability of the discharge, concentrating the discharge behavior within the intended area.

[0064] In one specific embodiment, the number of first pin 2 and second pin 3 is at least one.

[0065] Specifically, when the inductor is a differential-mode inductor, the number of first pin 2 and second pin 3 is one. Differential-mode inductors are mainly used to filter differential-mode signals in circuits. Their working principle is based on processing the current difference between two lines. In practical applications, differential-mode inductors are usually connected in series in the line requiring filtering. They only need one current inflow and outflow path to achieve the function of impeding and filtering differential-mode current. By setting the number of first pin 2 and second pin 3 to one, the functional requirements of differential-mode inductors in differential-mode signal filtering are precisely met. Effective processing of differential-mode current is achieved with a simple structure, avoiding unnecessary complexity and cost increases caused by too many pins. This simple design makes differential-mode inductors excellent in terms of cost control, miniaturization, and versatility in simple differential-mode filtering circuit scenarios. They can provide reliable filtering services for many circuits that need to suppress differential-mode noise at a low cost, such as differential-mode filtering stages in some power supply circuits. The single-pin-pair design of differential mode inductors makes their layout on PCB boards more flexible and simple, occupies less space, and is easy to place in areas with limited space. Furthermore, due to the small number of pins, the operation is simple and installation errors are less likely to occur during installation, which can improve production efficiency and reduce installation costs. It is especially suitable for application in large-scale automated production and speeds up the overall circuit assembly process.

[0066] When the inductor is a common-mode inductor, there are two first pins (2) and two second pins (3). The main function of a common-mode inductor is to suppress common-mode noise. It needs to process common-mode signals on two lines simultaneously, that is, to process the common-mode currents flowing in the same direction on the two lines. This requires two independent current input and output paths to connect the two lines respectively. Two pairs of pins (two first pins 2 and two second pins 3) can perfectly meet this requirement. Through the two pairs of pins, the common-mode inductor can introduce the common-mode current on the two lines. Utilizing the mutual inductance characteristics between its windings, the magnetic fields generated by the common-mode current cancel each other out, thereby achieving the purpose of suppressing common-mode noise. This pin configuration is closely determined based on the special electromagnetic working mechanism and functional requirements of the common-mode inductor. For a common-mode inductor, setting two first pins (2) and two second pins (3) can fully utilize its main function of suppressing common-mode noise, ensuring that common-mode interference in the circuit can be effectively suppressed in complex electromagnetic environments, improving the electromagnetic compatibility of the circuit, thereby ensuring the stable and reliable operation of the equipment and reducing signal distortion and bit errors caused by common-mode noise.

[0067] In one specific embodiment, there are two first pins 2 and two second pins 3, and the inductor base 1 is provided with a second groove 16; the second groove 16 is located between the two first pins 2 and between the two second pins 3.

[0068] Specifically, the second groove 16 is a slot, and it is arranged parallel to the first connecting portion 22 and the third connecting portion 32. One end of the second groove 16 is located between the two first connecting portions 22, and the other end is located between the two third connecting portions 32. The parallel arrangement of the second groove 16 with the first connecting portions 22 and the third connecting portions 32 is based on considerations for guiding the electric field distribution. When current flows in the pins, it generates an electric field around them. The parallel structure of the second groove 16 allows the electric field to extend in an orderly manner along its direction, avoiding disordered distortion and concentration of the electric field between the pins, and reducing electrical problems such as partial discharge and leakage caused by abnormal electric field. At the same time, this orderly electric field distribution is also beneficial for guiding the discharge along a more predictable and safer path under abnormal conditions such as overvoltage, which is in line with the design concept of ensuring the electrical safety and stable operation of the circuit. As a slotted second groove 16, with one end located between the two first connecting portions 22 and the other end located between the two third connecting portions 32, this layout creates a natural channel for air circulation. When the inductor generates heat during operation, this heat raises the temperature of the surrounding air. The hot air, being less dense, rises, while cooler air enters from one end of the second groove 16, flows along it, and carries away the heat, exiting from the other end. This natural thermal convection effectively dissipates heat. The slotted second groove 16, positioned between multiple pins, allows heat to be dissipated relatively evenly from around the pins, preventing localized overheating. Uniform heat dissipation helps maintain temperature consistency across the pins and within the inductor, preventing material degradation and changes in electrical parameters caused by excessively high local temperatures. This ensures the inductor can function stably and continuously, extending its lifespan and improving reliability in various complex circuit applications.

[0069] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An inductor device, characterized in that, include: The inductor base, PCB board, first pin and second pin are provided. The first pin and the second pin are both connected to the inductor base and the PCB board, and a discharge gap is formed between the first pin and the second pin.

2. The inductor device according to claim 1, characterized in that, The first pin and the second pin are respectively provided with a first discharge terminal and a second discharge terminal, the first discharge terminal and the second discharge terminal are arranged facing each other, and the discharge gap is formed between the first discharge terminal and the second discharge terminal.

3. The inductor device according to claim 2, characterized in that, The first pin includes a first connecting portion and a second connecting portion connected to the first connecting portion; the second pin includes a third connecting portion and a fourth connecting portion connected to the third connecting portion; both the first connecting portion and the third connecting portion are connected to the inductor base; both the second connecting portion and the fourth connecting portion are connected to the PCB board.

4. The inductor device according to claim 3, characterized in that, The first discharge terminal is located at one end of the first connection portion near the third connection portion, and the second connection portion is connected to the other end of the first connection portion; the second discharge terminal is located at one end of the third connection portion near the first connection portion, and the fourth connection portion is connected to the other end of the third connection portion.

5. The inductor device according to claim 3, characterized in that, The inductor base has a first groove, and the first pin and the second pin are located on opposite sides of the first groove.

6. The inductor device according to claim 5, characterized in that, The inductor base is further provided with a first mounting slot and a second mounting slot; the first mounting slot, the first groove, and the second mounting slot are connected in sequence; the first connecting part is installed in the first mounting slot, the first discharge end and the second connecting part both extend out of the first mounting slot, and the first discharge end is located in the first groove; the third connecting part is installed in the second mounting slot, the second discharge end and the fourth connecting part both extend out of the second mounting slot, and the second discharge end is also located in the first groove.

7. The inductor device according to claim 1, characterized in that, The number of the first pin and the number of the second pin are both at least one.

8. The inductor device according to claim 7, characterized in that, The number of the first pin and the number of the second pin are both two, and the inductor base is provided with a second groove; the second groove is located between the two first pins and between the two second pins.

9. The inductor device according to claim 2, characterized in that, The distance between the first discharge end and the second discharge end is 0.1 to 0.5 mm.

10. The inductor device according to claim 2, characterized in that, Both the first discharge end and the second discharge end are tapered; or both the first discharge end and the second discharge end are arc-shaped; or both the first discharge end and the second discharge end are serrated.

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