Multichannel inductive device and electronic device

Abstract

The application relates to the technical field of inductor devices, and discloses a multi-channel inductor device and an electronic device. The multi-channel inductor device comprises a magnetic core, a coil, at least one connecting section, and terminal pins. The coil is arranged in the magnetic core and comprises oppositely-arranged sections and at least one connecting section arranged between the oppositely-arranged sections and connected to the oppositely-arranged sections. The connecting section divides the interval between adjacent oppositely-arranged sections into at least two magnetic path areas with different projection areas on the end face of the magnetic core, so as to provide multi-channel loop selection of the inductor device. One end of each terminal pin is integrally connected to the lower end face of the magnetic core at the end of the oppositely-arranged section, and the other end of the terminal pin is connected to the upper end face of the magnetic core through the side face of the magnetic core. The application improves the functionality and flexibility of the inductor device.

Description

Technical Field

[0001] This application relates to the field of inductor technology, specifically to a multi-channel inductor and electronic device. Background Technology

[0002] Inductors convert electrical energy into magnetic energy for storage. They have the characteristics of blocking AC and passing DC. In circuits, they play roles such as filtering, oscillation, delay, notch filtering, signal screening, noise filtering, current stabilization, and suppression of electromagnetic interference. As a basic component in circuits, they are widely used in various scenarios.

[0003] In related technologies, once an inductor is manufactured, its current path and magnetic flux path are unique and determined, and its inductance is a fixed value. When the circuit design requires different inductance values, inductors of different specifications must be selected and soldered. This not only increases material costs and the layout space of the target, but also limits the flexibility and integration of the circuit design. Furthermore, the external connection method of inductors in related technologies is limited. When the circuit layout is restricted by other tall components, structural parts, or heat dissipation paths, the fixed installation method may lead to wiring difficulties, wasted space, or even inability to install, making it difficult to meet the internal structural design requirements of increasingly complex and miniaturized electronic products. Utility Model Content

[0004] In view of this, this application provides a multi-channel inductor and electronic device to solve the aforementioned technical problems.

[0005] In a first aspect, embodiments of this application disclose a multi-channel inductor device, comprising: magnetic core; A coil, the coil being placed within the magnetic core, the coil comprising spaced-apart opposing segments and at least one connecting segment located between the opposing segments and respectively connecting the opposing segments, the connecting segment dividing the spaced area between adjacent opposing segments into at least two magnetic circuit regions with unequal projected areas relative to the end face of the magnetic core, to provide multi-channel loop selection for the inductor. Each terminal pin has one end integrally connected to the lower end face of the magnetic core corresponding to the end of the opposing segment, and the other end of the terminal pin is connected to the upper end face of the magnetic core via the side of the magnetic core.

[0006] In one possible example, the coil is arranged in an 'H' shape in the vertical projection of a first direction, which is the extension direction of the upper / lower ends of the magnetic core.

[0007] In one possible example, the coil located within the magnetic core and the terminal pin are arranged in a 'V' shape in the vertical projection of a second direction, wherein the second direction is perpendicular to the first direction.

[0008] In one possible example, the magnetic core is integrally formed, and the coil is seamlessly connected within the magnetic core.

[0009] In one possible example, the magnetic core includes a first magnet and a second magnet connected to each other, with the coil disposed between the first magnet and the second magnet.

[0010] In one possible example, the terminal pin includes an extension and an extension portion, the end of the opposing segment is bent toward the extension portion and connected to one end of the extension portion to the lower end face of the magnetic core, and the extension portion is integrally connected to the other end of the extension portion, and the extension portion is attached to the side of the magnetic core and extends to the upper end face of the magnetic core.

[0011] In one possible example, in the vertical projection of the second direction, the extension thins toward the expansion portion, and in the vertical projection of the first direction, the extension gradually widens toward the expansion portion until it is the same width as the expansion portion.

[0012] In one possible example, if the cross-sectional area of ​​the extension is set to J1 and the cross-sectional area of ​​the opposing segment is set to J2, then 0.1≤J1 / J2≤5 and the thickness of the extension is ≤0.5mm.

[0013] In one possible example, the widths of adjacent opposing segments and connecting segments in the vertical projection of the first direction are not equal, and the length and width dimensions of each terminal pin in the vertical projection of the third direction or the first direction are the same, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0014] Secondly, embodiments of this application disclose an electronic device including the multi-channel inductor device described in any of the above embodiments.

[0015] In summary, compared with the prior art, this application discloses a multi-channel inductor and electronic device. The multi-channel inductor includes a magnetic core, a coil, and terminals. The coil is placed inside the magnetic core and includes spaced-apart opposing segments and at least one connecting segment located between the opposing segments and connected to them respectively. The connecting segment divides the spaced area between adjacent opposing segments into at least two magnetic circuit regions with unequal projected areas relative to the end face of the magnetic core, so as to provide multi-channel circuit selection for the inductor. One end of each terminal is integrally connected to the lower end face of the magnetic core with the end of the opposing segment, and the other end of the terminal is connected to the upper end face of the magnetic core via the side of the magnetic core. That is, through the above configuration, the functionality and flexibility of the inductor are improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the first type of multi-channel inductor device of this application; Figure 2 This is a schematic diagram of the cross-sectional structure of the first type of multi-channel inductor in this application; Figure 3 This is a schematic diagram of the structure of the first type of coil in this application; Figure 4 This is a top-view perspective view of the multi-channel inductor device of this application; Figures 5a to 5e This is a schematic diagram of the circuit selection for the multi-channel inductor device in this application; Figure 6 This is a schematic diagram of the assembly structure of the first type of multi-channel inductor device in this application; Figure 7 This is a schematic diagram of the assembly structure of the second type of multi-channel inductor device in this application; Figure 8 This is a three-dimensional structural schematic diagram of the second type of multi-channel inductor device of this application; Figure 9 yes Figure 8 A schematic diagram of the internal structure of a multi-channel inductor device concealed behind a second magnet; Figure 10 This is a schematic diagram of the structure of the second type of coil in this application. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the claims.

[0019] It should be noted that, in this document, 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 a process, method, article, or apparatus. Without further limitations, 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 that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0020] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0021] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0022] In the description of this application, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] The technical solutions shown in this application will be described in detail below through specific embodiments. It should be noted that the order of description of the following embodiments is not intended to limit the priority of the embodiments.

[0024] Please refer to Figures 1 to 4 The multi-channel inductor of this application includes a magnetic core 1, a coil 2, and a terminal 6.

[0025] In the specific implementation process, the coil 2 is placed inside the magnetic core 1. The coil 2 includes spaced-apart opposing segments 3 and at least one connecting segment 4 located between the opposing segments 3 and connected to the opposing segments 3 respectively. One end of each terminal pin 6 is integrally connected to the lower end face 1b of the magnetic core 1 with the end of the opposing segment 3, and the other end of the terminal pin 6 is connected to the upper end face 1a of the magnetic core 1 via the side of the magnetic core 1.

[0026] Therefore, the number of terminal pins 6 can be distributed on the magnetic core 1 in correspondence with the number of ends of the opposing section 3. Each terminal pin 6 is integrally connected to the end of the opposing section 3, that is, the terminal pin 6 can be regarded as part of the end of the opposing section 3. Thus, the coil 2 and the terminal pin 6 are an integral structure, making the connection between the terminal pin 6 and the magnetic core 1 more robust. This integrated connection method has high mechanical strength and can better withstand mechanical and thermal stresses during installation and use, thereby improving the overall reliability of the device.

[0027] The other end of the terminal pin 6 is connected to the upper end face 1a of the magnetic core 1 via the side of the magnetic core 1. This three-dimensional terminal pin structure design gives multi-channel inductor devices a variety of mounting methods. That is, the terminal pin 6 is exposed on the upper end face 1a, the lower end face 1b and the side of the magnetic core 1 at the same time. This provides the greatest freedom for circuit design. The device can be designed to be soldered from the top, soldered from the bottom, soldered using the side or mechanically bound, and thus can adapt to any demanding PCB layout and system structure requirements. When all the terminal pins 6 are arranged in this way, they together form a metal frame around the magnetic core 1. This frame not only serves as an electrical connection point, but also effectively shields the internal magnetic field from leakage to the outside and reduces electromagnetic interference. At the same time, the metal frame acts as an efficient heat dissipation network, which can quickly conduct the heat generated by the coil 2 from the various surfaces of the magnetic core 1, greatly improving the heat dissipation capacity of the device.

[0028] This means that the device can be surface mounted like a traditional surface mount component, or it can be vertically mounted or side-soldered using the terminal pins 6 on the side of the magnetic core 1. This provides more possibilities for the three-dimensional layout and space optimization of the receiving target (such as a PCB board) to adapt to various narrow or non-standard mounting spaces and improve the flexibility of the device.

[0029] Meanwhile, when the device is mounted using the traditional mounting method, i.e., when the terminal pin 6, which is integrally connected to the lower end face 1b of the magnetic core 1 and the target receiver, or when the terminal pin 6, which is connected to the upper end face 1a of the magnetic core 1, is connected to the target receiver, the terminal pin 6 located on the side of the magnetic core 1 forms a protective part on the side of the magnetic core 1 in terms of physical structure. This protective part can provide effective mechanical protection for the side of the magnetic core 1. In actual application scenarios, if other components or tools accidentally touch the side of the device during subsequent assembly or maintenance, they will first come into contact with the terminal pin 6, rather than the relatively fragile magnetic core 1 itself. This is equivalent to setting up a "protective barrier" on the side of the magnetic core 1, thereby effectively avoiding chipping or overall damage to the magnet edges and corners caused by accidental collisions or scratches, and improving the reliability of the device during production and use.

[0030] Preferably, the coil 2 is placed horizontally inside the magnetic core 1. Specifically, "horizontal placement" means that the extension plane of the main body of the coil 2, that is, its effective conductive circuit (composed of the opposing section 3 and the connecting section 4), is parallel to the upper / lower end face of the magnetic core 1 and is covered and encapsulated by the magnetic core 1. This makes it easier for the magnetic field lines of the device to be effectively guided and constrained by the magnetic core material, and also makes it easier for the opposing section 3 of the coil 2 to naturally extend toward the edge of the magnetic core 1, thereby realizing diversified installation of the device.

[0031] In a preferred implementation of this embodiment, the unique structure of coil 2 is designed to precisely shape the magnetic circuit inside core 1. Specifically, the connecting segment 4 divides the space 5 between adjacent opposing segments 3 into at least two magnetic circuit regions with unequal projected areas relative to the end face of core 1, providing multi-channel loop selection for the inductor. This design is the core of the device's multi-functionality. The unequal magnetic circuit regions mean that when current flows through coil 2, by selecting different terminal pins 6 as the current input and output terminals, the current can be forced to flow through different loops constructed by opposing segments 3 and connecting segments 4. Different loops will dominantly utilize their corresponding specific area magnetic circuit regions as the main magnetic flux path, thereby directly leading to different inductance values ​​ultimately exhibited by the device. Thus, multi-channel loop selection can be provided for a single inductor, achieving the key effect of a single device having multiple different inductance values, greatly improving the device's integration and application flexibility.

[0032] Meanwhile, different terminal pin 6 selections mean that current will flow through different conductive loops constructed by the opposing segment 3 and the connecting segment 4. So when any selected loop is working, the opposing segments 3 that do not have current flowing through are not just idle. These non-current opposing segments 3 can serve as effective heat conduction paths to assist the device in heat dissipation. Specifically, the Joule heat generated in the current-carrying wires when the device is working can be transferred to these non-working opposing segments 3 through the coil itself and the surrounding magnetic core material. This significantly increases the effective heat exchange area with the internal magnetic core 1 and the external environment, thereby accelerating the rate at which the heat generated by the device is diffused to the outside.

[0033] All parts of coil 2, whether or not they participate in conduction, together form a distributed internal heat dissipation network. Combined with the large area characteristic of magnetic core 1 itself, this effectively improves the overall heat dissipation capacity of the device, thereby helping to maintain the reliability and performance stability of the device under high temperature or high current operating conditions.

[0034] As another preferred implementation of this embodiment, the unique structure of the coil 2 is designed to precisely shape the magnetic circuit inside the magnetic core 1. Specifically, the coil 2 includes spaced-apart opposing segments 3 and at least one connecting segment 4 located between the opposing segments 3 and connected to each opposing segment 3. The connection point between the connecting segment 4 and the opposing segment 3 is located at a non-central location of the opposing segment 3 to provide multi-channel loop selection for the inductor. The technical effect of this non-central connection design is to actively and purposefully break the symmetry of the magnetic circuit, so as to divide the window area (spaced area 5) formed between two adjacent opposing segments 3 into two magnetic circuit areas with different areas. Similarly, by selecting different terminal pins 6 as the input and output terminals of the current, the current can be forced to flow through different loops constructed by the opposing segments 3 and the connecting segment 4, thereby directly resulting in different inductance values ​​of the device. Thus, multi-channel loop selection can be provided for a single inductor, achieving the key effect of a device having multiple different inductance values, greatly improving the integration and application flexibility of the device.

[0035] Preferably, the coil 2 has a plate-shaped conductor structure design. The coil 2 can be made by stamping, etching or other precision forming processes into a flat metal plate with a specific shape, which can have a larger surface area to volume ratio and increase the contact area with the magnetic core 1. This greatly optimizes the heat conduction path. The heat generated during operation can be transferred to the magnetic core 1 and dissipated into the environment more efficiently through the entire plate surface, thereby effectively reducing the temperature rise of the device. At the same time, the flat and wide conductor structure can make more efficient use of the window area inside the magnetic core 1 and reduce leakage flux. In addition, in high-frequency applications, the plate-shaped conductor helps to reduce the negative impact of the skin effect and improve the Q value and efficiency of the device.

[0036] It should be noted that, with Figure 1 Taking the constructed XYZ spatial coordinates as an example, the X-axis direction can be regarded as the first direction in this embodiment, that is, the extension direction of the upper / lower end of the magnetic core 1, which can also be regarded as the direction perpendicular to the upper / lower end face of the magnetic core 1. The Y-axis direction can be regarded as the second direction in this embodiment, that is, the extension direction of the front / rear side of the magnetic core 1, which can also be regarded as the direction perpendicular to the front / rear side face of the magnetic core 1. The Z-axis direction can be regarded as the third direction in this embodiment, that is, the extension direction of the left / right side of the magnetic core 1, which can also be regarded as the direction perpendicular to the left / right side face of the magnetic core 1. The first direction, the second direction, and the third direction are perpendicular to each other. Of course, the direction design in this embodiment is not limited to this. XYZ can also be any other direction that is perpendicular to each other in space in actual working requirements, which will not be elaborated here.

[0037] Preferably, the coil 2 is arranged in an 'H' shape in the vertical projection of the first direction. Specifically, the 'H' shape is composed of two parallel opposing segments 3 forming the two vertical sides of the 'H' shape, and a connecting segment 4 between them forming the middle beam of the 'H' shape. This unique 'H' shape projection structure is the core physical basis for realizing the multi-path function in this embodiment. It intuitively reveals that the current has multiple selectable flow paths inside the magnetic core 1. By selecting different endpoints (i.e. different terminal pins 6) on the 'H' shape as the input and output of the current, the current can be forced to flow through different effective conductor lengths, and the magnetic circuit regions of different volumes divided by the 'H' shape can be used dominantly, thereby ultimately obtaining multiple different inductance values ​​on a single inductor device.

[0038] Regarding the multi-channel loop selection design of this embodiment, taking the coil 2 of this application, which includes two opposing segments (3a, 3b) arranged at intervals, and a connecting segment 4 located between the two opposing segments (3a, 3b) and connected to the opposing segments (3a, 3b) respectively, as an example, the outer wall of the magnetic core 1 has four terminal pins (6a, 6b, 6c, 6d). When the inductor is connected to the pads of the PCB board 10, the inductor has at least five multi-channel loop selections, and generates different inductance values ​​accordingly. For details, please refer to... Figures 5a to 5e .

[0039] As shown in 5a, the inductor is connected to the pads 101 and 102 of the PCB board 10 through the terminals 6a and 6b at both ends of the opposed section 3a, respectively. The terminals 6c and 6d at both ends of the opposed section 3b are idle. In this state, the current path of the coil 2 of the inductor presents the first ZY direction, and thus has the first inductance. As shown in 5b, the inductor is connected to the pads 101 and 102 of the PCB board 10 through the terminal pin 6a at one end of the opposing section 3a and the terminal pin 6d at one end of the opposing section 3b, respectively. The terminal pins 6b and 6c at the other end of the opposing section 3a are idle. In this state, the current path of the inductor coil 2 presents a second ZY flow direction, and thus has a second inductance. As shown in 5c, the inductor is connected to the pads 101 and 102 of the PCB board 10 through the terminal pins 6a at one end of the opposing section 3a and 6c at one end of the opposing section 3b, respectively. The terminal pins 6b and 6d at the other end of the opposing section 3a are idle. In this state, the current path of the inductor coil 2 presents a third ZY flow direction, and thus has a third inductance. As shown in 5d, the inductor is connected to the pads 101 and 102 of the PCB board 10 through the terminal pin 6b at one end of the opposing section 3a and the terminal pin 6d at one end of the opposing section 3b, respectively. The terminal pins 6a at the other end of the opposing section 3a and the terminal pins 6c at the other end of the opposing section 3b are idle. In this state, the current path of the coil 2 of the inductor presents the fourth ZY direction, and thus has the fourth inductance. As shown in 5e, the terminal pin 6a at one end of the opposing section 3a and the terminal pin 6c at one end of the opposing section 3b of the inductor are connected to the pad 102 of the PCB board 10. The terminal pin 6b at the other end of the opposing section 3a and the terminal pin 6d at the other end of the opposing section 3b are also connected to the PCB board 102. In this state, the current path of the inductor coil 2 presents the fifth ZY flow direction, and thus has the fifth inductance.

[0040] Referring to the five multi-channel loop selection designs in the above examples, the multi-channel inductor of this application can force the current to flow through different loops constructed by opposing segments 3 and connecting segments 4 by selecting different terminal pins 6 as the current input and output terminals. Different loops will dominate the use of their corresponding specific volume magnetic circuit regions as the main magnetic flux path, which directly leads to different inductance values ​​of the device. Thus, multi-channel loop selection can be provided for a single inductor device, realizing the key effect of a device having multiple different inductance values, greatly improving the integration and application flexibility of the device.

[0041] Continue to combine Figure 4 In a key design detail of this embodiment, the projected dimensions of coil 2 and terminal pin 6 have been specifically optimized. Specifically, the widths of adjacent opposing segments 3 and connecting segments 4 in the vertical projection of the magnetic core 1 in the first direction are not equal. Figure 4 The design of K1, K2, and K3 is not arbitrary. Different terminal pin 6 connection methods correspond to different current paths and operating inductances. This application precisely sets the cross-sectional area of ​​each conductor segment by setting K1≠K2≠K3 (the projected width is directly related to its cross-sectional area). This allows each current path to have a current-carrying capacity that matches its expected operating inductance. For example, a larger width (cross-sectional area) can be designed for the opposing segment 3 or the connecting segment 4, which are mainly traversed by low-inductance, high-current paths, to reduce their DC resistance and ensure that they have a higher rated current. Conversely, for high-inductance paths, appropriate adjustments can be made. This ensures that the device can obtain a corresponding and appropriate rated current under multiple operating inductances, avoiding the bottleneck of the entire device performance due to insufficient current-carrying capacity of a certain path.

[0042] Meanwhile, coil 2 and magnetic core 1 are in a "competitive" relationship in terms of limited cross-sectional area. By selectively adjusting the width of each section of coil 2, rather than using a uniform width or narrowness, a more reasonable allocation of the cross-sectional area occupied by coil 2 and magnetic core can be achieved. This dynamic allocation allows sufficient magnetic circuit cross-section to be reserved in areas requiring high saturation characteristics to prevent magnetic saturation, provides sufficient conductor cross-section in areas requiring low DC resistance, and utilizes conductors as thermal bridges in areas requiring efficient heat dissipation. Ultimately, key performance indicators such as inductance, saturation current, heat dissipation efficiency, and DC resistance of the inductor are synergistically optimized to achieve the most balanced state of comprehensive performance, rather than unilaterally pursuing the extreme of a single indicator.

[0043] Furthermore, the length and width dimensions of each terminal pin 6 in the vertical projection of the third or first direction of the magnetic core 1 are the same, that is, the length and width dimensions of each terminal pin 6 in the vertical projection of the upper / lower end face or the left / right side face of the magnetic core 1 are the same, thereby ensuring the consistency of all external electrical connection points and avoiding defects such as skewing, offset and tombstoning caused by uneven force on the terminal pin 6 during inductor mounting. This provides a reliable and standardized external interface for the above-mentioned complex internal performance optimization, so as to ensure the soldering yield of the device in large-scale production.

[0044] Optionally, the magnetic core 1 is arranged in a rectangular structure, and the magnetic core 1 has an upper end surface 1a, a lower end surface 1b and a side surface connecting the upper end surface 1a and the lower end surface 1b.

[0045] In a preferred embodiment of this invention, one end of each terminal pin 6 is integrally connected to the lower end face 1b of the magnetic core 1, corresponding to the end of the opposing segment 3, and the other end of the terminal pin 6 is connected to the upper end face 1a of the magnetic core 1 via the side of the magnetic core 1. The end of the opposing segment 3 is bent toward the terminal pin 6 and integrally connected to the lower end face 1b of the magnetic core 1 with one end of the terminal pin 6.

[0046] Therefore, based on the bending structure design of the end of the opposing section 3, the end of the opposing section 3 and the terminal pin 6 form an "L" shaped bending path in the magnetic core 1. This not only ensures that the terminal pin 6 and the magnetic core 1 have extremely high bonding strength and stability, avoiding the risk of stress concentration or loosening caused by external bending, but also creates mounting surfaces on the lower end face 1b and side face of the magnetic core 1, thereby providing a variety of mounting methods for the device.

[0047] In one example, the coil 2 disposed inside the magnetic core 1 and the terminal pins 6 are arranged in a "几"-shaped structure in the vertical projection along the second direction. Specifically, this "几"-shaped projection structure is clearly presented sequentially from top to bottom by the following parts: a horizontal line segment located at the upper part of the projection that represents the opposing section 3, extension segments extending downward from both ends of the horizontal line segment that represent the ends of the opposing section 3 bent toward the lower end face 1b of the magnetic core 1, and segments extending horizontally outward from the ends of the extension segments that represent the portions of the terminal pins 6 integrally connected with the ends of the opposing section 3 at the lower end face 1b of the magnetic core 1.

[0048] Further, to optimize the magnetic circuit structure and balance the device performance, in this embodiment, the position where the coil 2 is transversely arranged in the magnetic core 1 is precisely designed. Specifically, if the vertical distance between the opposing section 3 and the upper end face 1a of the magnetic core 1 is defined as H1, and the vertical distance between the opposing section 3 and the lower end face 1b of the magnetic core 1 is defined as H2, then 0.5≤H1 / H2≤2.

[0049] Thus, the magnetic circuit symmetry of the device is ensured, and performance deviation is avoided. When the ratio of H1 / H2 deviates too much, it means that the opposing section 3 is too close to the lower end face 1b or the upper end face 1a, which will lead to severe asymmetry of the magnetic resistance of the upper and lower magnetic circuits, resulting in unexpected and excessive differences in key parameters such as inductance and saturation current when different loops are selected, which is not conducive to the stability and predictability of performance. When H1 / H2 is between 0.5 and 2, it is ensured that the coil 2 is located in the approximate central region of the magnetic core 1, which can provide relatively balanced magnetic flux paths for the upper and lower parts of the magnetic circuit, so that the device can exhibit stable and consistent electrical performance under different installation postures and working modes.

[0050] Moreover, based on the limitation of 0.5≤H1 / H2≤2, the heat generated by the coil 2 can be transferred almost equally to the magnetic core 1 and the external environment in both the upward and downward directions, which optimizes the heat dissipation uniformity. At the same time, it also provides similar magnetic saturation margins for the upper and lower parts of the magnetic core 1, which jointly contributes to the optimal comprehensive balance of multiple performance indicators of the device, such as inductance accuracy, saturation current characteristics and heat dissipation efficiency.

[0051] To further consolidate the above effects, preferably, if the vertical distance between the opposing section 3 and the upper end face 1a of the magnetic core 1 is defined as H1, and the vertical distance between the opposing section 3 and the lower end face 1b of the magnetic core 1 is defined as H2, then 0.75≤H1 / H2≤1.

[0052] To further consolidate the above effects, optionally, the covering thickness of the magnetic core 1 that completely encloses the coil 2 is ≥0.3mm, and the deviation of the covering thickness of the magnetic core 1 relative to the upper / lower end face of the coil 2 is <50%.

[0053] In a preferred implementation of this embodiment, the aforementioned three-dimensional wraparound terminal 6 is further structurally divided to optimize its manufacturing process and functional characteristics. Specifically, the terminal 6 is constructed to include two functional segments: an extension 61 and an extension 62. The end of the opposing segment 3 is bent toward the extension 61 and connected to one end of the extension 61 to the lower end face 1b of the magnetic core 1. The extension 62 is integrally connected to the other end of the extension 61 and extends to the upper end face 1a of the magnetic core 1 while adhering to the side of the magnetic core 1.

[0054] Then, the end of the opposing segment 3 is bent toward the extension 61, and then the two are connected to the lower end face 1b of the magnetic core 1. This connection point constitutes the electrical and mechanical anchor point of the terminal pin 6 on the lower surface 1b of the magnetic core 1. Then, the extension 62 is integrally connected to the other end of the extension 61. The extension 62 is tightly attached to the side of the magnetic core 1 and extends upward. Finally, the end of the extension 62 away from the extension 61 extends to the upper end face 1a of the magnetic core 1. Optionally, it is bent and attached to the upper end face 1a of the magnetic core 1 to form the upper electrical connection point.

[0055] Therefore, the terminal pin 6 is divided into an extension 61, which is mainly responsible for the electrical connection in the direction of the lower end face 1b of the magnetic core 1, and an extension 62, which is mainly responsible for the side contact and terminal structure reinforcement and electrical connection in the direction of the upper end face 1a of the magnetic core 1. This allows for independent optimization of different parts. For example, the extension 61 can prioritize ensuring the conductivity of the device, while the extension 62 can prioritize ensuring the contact area with the magnetic core 1 to achieve the best structural connection strength, heat dissipation and shielding effect.

[0056] Based on the structural design of the extension 61 and the expansion 62, such as Figure 6 and Figure 7 As shown, multi-channel magnetic devices can be designed to be soldered from the top, from the bottom, or using the sides for soldering or mechanical bonding, thus adapting to any demanding PCB layout and system structure requirements. When all the terminals 6 are arranged in this way, they together form a metal frame around the magnetic core 1. This frame not only serves as an electrical connection point but also effectively shields the internal magnetic field from leakage, reducing electromagnetic interference. At the same time, this metal frame acts as a highly efficient heat dissipation network, quickly dissipating the heat generated by the coil 2 from the surfaces of the magnetic core 1, greatly improving the device's heat dissipation capacity. That is, the device can be surface-mounted like traditional surface mount components, or it can be vertically mounted or side-soldered using the terminals 6 on the side of the magnetic core 1. This provides more possibilities for the three-dimensional layout and space optimization of the PCB board 10, adapting to various narrow or non-standard installation spaces and improving the device's flexibility.

[0057] In one example, continue combining Figure 3 and Figure 4In the vertical projection of the second direction, the extension 61 thins towards the expansion portion 62, and in the vertical projection of the first direction, the extension 61 gradually widens towards the expansion portion 62 until it is the same width as the expansion portion 62. Thus, through the structural design of the gradually widening (gradually increasing) extension 61, the cross-sectional area that may be lost due to the thinning is compensated. This allows the current-carrying cross-sectional area of ​​the conductor in the critical passage area of ​​the extension 61 to be maintained at the size necessary for the device application, ensuring sufficient current carrying capacity and low DC resistance. At the same time, the widening shape also provides more stable mechanical support for the connection part.

[0058] Simultaneously, through a thinning structural design, the thickness of the extension 61 in the bending area connected to the extension 62 is reduced, so that a smaller and smoother bend radius can be formed in this bending process. This controlled radius is crucial for the side soldering process and subsequent automated optical inspection (AOI) in modern electronic device assembly. It ensures that the solder can form a uniform and continuous soldering meniscus when the device is applied, avoiding solder failure to climb or misjudgment due to excessively large or irregular radius. This ensures the testability and accuracy of the side soldering AOI of the device and improves the production yield.

[0059] Optionally, the extension 61 is thinned to less than 0.5mm toward the expansion 62, that is, the thickness of the expansion 62 is ≤0.5mm. This size limitation directly determines that the radius R of the rounded corner formed at the bend between the extension 61 and the expansion 62 is ≤0.5mm.

[0060] Understandably, in the surface mount technology (SMT) process, solder will climb along the side of pin 6 of the device, forming a "solder creep" meniscus. AOI equipment uses optical imaging to detect the height and shape of this solder creep to determine the soldering quality. An excessively large bend (e.g., exceeding 0.5mm) will form an irregular curved transition, which will seriously interfere with the formation of the solder creep meniscus, resulting in insufficient solder creep height or irregular shape. At the same time, this irregular geometry will also interfere with the imaging light of AOI, forming shadows or reflections, thus leading to misjudgment.

[0061] By controlling the thickness of the extension 62 and the corresponding bending radius to ≤0.5mm, the regularity and sharpness of the geometry of its bending area can be ensured, thereby allowing the solder to form a full, continuous and clearly contoured solder meniscus. This provides a high-contrast, interference-free, clear image for AOI inspection, ensuring the testability and accuracy of side solder AOI inspection, thereby improving the level of soldering quality monitoring and device reliability in large-scale production.

[0062] Furthermore, to ensure reasonable impedance matching and balanced performance when current flows through different components of coil 2, the cross-sectional area ratio of the key conductors in this embodiment is precisely limited. Specifically, the cross-sectional area of ​​the extension section 62 is set to J1, and the cross-sectional area of ​​the opposing section 3 is set to J2. Then, 0.1≤J1 / J2≤5. This ensures the continuity of the current path in coil 2 and avoids local overheating. The lower limit of J1 / J2 ensures that the extension section 62 has a basic current-carrying capacity. If J1 / J2 is too small, when the current flows from the larger-section opposing section 3 to the smaller-section extension section 62, a bottleneck effect will occur at the connection due to the sudden increase in current density, causing an abnormal increase in the DC resistance of that part, resulting in local overheating. The design of 0.1≤J1 / J2≤5 ensures that the current carrying capacity of the expansion section 62 is on the same order of magnitude as that of the opposing section 3. This guarantees that there are no obvious weak links in the current path from the internal circuit to the external terminal, thus achieving the best comprehensive balance in terms of current carrying capacity, temperature rise, and space utilization.

[0063] In one example, the magnetic core 1 is integrally formed, and the coil 2 is seamlessly connected inside the magnetic core 1. Specifically, the magnetic core 1 is integrally formed by pressing soft magnetic powder and colloid in one step. During this process, the pre-bent coil 2 is precisely positioned and fixed in the mold. Then, the soft magnetic powder and colloid fill and wrap around it under high pressure and solidify to form a dense magnetic core structure. Thus, the coil 2 is completely and seamlessly embedded inside the magnetic core 1, so there are no cavities or loose interfaces between the coil 2 and the magnetic core 1. This makes the two a solid whole, which can effectively resist mechanical vibration and impact, as well as thermal stress caused by temperature cycling, greatly improving the structural integrity and long service life of the device.

[0064] Furthermore, the tight, gapless contact allows the heat generated by the coil 2 during operation to be efficiently conducted to the entire magnetic core 1 through the huge contact area, and then dissipated into the environment through the surface of the magnetic core 1, thereby significantly improving the heat dissipation capacity of the device and helping to maintain its stable electrical performance under high loads.

[0065] Furthermore, the integrally formed magnetic core 1 ensures the uniformity and consistency of the magnetic circuit structure, avoiding changes in magnetic reluctance or local magnetic saturation caused by internal gaps. This results in higher accuracy and batch consistency for key parameters such as inductance and saturation current of the device. The seamless connection of the coil 2 within the magnetic core 1 means that the conductor is embedded in a completely dense magnetic material environment. This eliminates the air gap between the coil 2 and the magnetic core 1, allowing magnetic lines of force to pass through the low magnetic reluctance magnetic core material without obstruction and tightly wrap around the conductor, avoiding leakage magnetic defects.

[0066] In one example, the multi-channel magnetic device employs a split core structure for easy assembly, see reference. Figure 8 and Figure 9 The magnetic core 1 includes a first magnet 11 and a second magnet 12 that are connected to each other, and the coil 2 is disposed between the first magnet 11 and the second magnet 12.

[0067] That is, the pre-formed coil 2 is positioned and placed in a preset position on the first magnet 11 or the second magnet 12, and then another magnet is aligned with it and hot-pressed, so that the coil 2 is embedded between the first magnet 11 and the second magnet 12 without gaps.

[0068] Optionally, when the coil 2 is placed at a preset position of the first magnet 11 or the second magnet 12, in order to facilitate preliminary assembly and positioning, the coil 2 can temporarily maintain a certain initial gap with the preset position of the first magnet 11 or the second magnet 12. Taking the coil 2 placed at a preset position of the first magnet 11 as an example, the first magnet 11 and the coil 2 on it can be preheated and pressed before the first magnet 11 and the second magnet 12 are combined and hot-pressed. By applying appropriate temperature and pressure, the magnetic material on the surface or the whole of the first magnet 11 will undergo slight softening and plastic flow, thereby filling and completely fusing the initial gap between the first magnet 11 and the coil 2. The temperature of the preheating and pressing can include 180±15°, and is preferably 175°.

[0069] Therefore, the split-press structure design allows the complex coil 2 to be pre-placed on a magnet before hot pressing, which simplifies the manufacturing process. After hot pressing, the contact interface between the first magnet 11 and the second magnet 12 can form a dense connection through the plastic deformation of the soft magnetic material itself or the adhesive bonding. This allows the coil 2 to be firmly clamped and wrapped inside the magnetic core 1, realizing a gapless connection between the coil 2 and the magnetic core 1. This tight wrapping ensures that the device has extremely high mechanical strength and can effectively conduct working heat and optimize heat dissipation.

[0070] Despite being a split structure, the two magnets can be tightly fitted together by hot pressing, which minimizes the high magnetic resistance points in the magnetic circuit caused by assembly gaps. This allows the magnetic lines of force to remain closed in a nearly complete low magnetic resistance path, significantly suppressing magnetic leakage and ensuring the stability and consistency of the device's inductance.

[0071] Optionally, in another means of enhancing the mechanical strength and long-term reliability of the first magnet 11 and the second magnet 12 after they are combined, the first magnet 11 and the second magnet 12 can also be fixed by adhesive bonding. That is, an adhesive layer can be pre-coated or applied to the joint surface of the first magnet 11 and / or the second magnet 12, or an adhesive layer can also be applied or applied to a portion of the coil 2, and then the first magnet 11 and the second magnet 12 can be bonded together to ensure that the device has extremely high mechanical strength and high assembly efficiency.

[0072] refer to Figure 10 In the more complex configuration of this embodiment, the magnetic circuit design can have greater flexibility and precision. Specifically, multiple connecting segments 4 are connected between adjacent opposing segments 3, and the connection point between each connecting segment 4 and the opposing segment 3 is located at a non-center position of the opposing segment 3, thereby realizing fine division of the magnetic circuit and multiple sensitivity selection.

[0073] Understandably, a single connecting segment 4 divides the interval region 5 between two opposing segments 3 into two magnetic circuit regions, while multiple connecting segments 4 divide the interval region 5 into three or more sub-magnetic circuit regions of different areas and shapes at different connection point positions. When current flows through different connecting segments 4, the dominant magnetic flux path it excites will traverse these different combinations of sub-magnetic circuit regions. Since the magnetoresistance characteristics of each sub-magnetic circuit region are different, this allows a single device to provide more and more finely differentiated inductance values, thereby greatly expanding the channel selection range and application scenarios of the device.

[0074] This application also discloses an electronic device, including a multi-channel inductor as described in any of the above embodiments. For other working principles and processes of the electronic device in this embodiment, please refer to the description of the multi-channel inductor in the above embodiment, which will not be repeated here.

[0075] The multi-channel inductor and electronic device provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. It should be noted that the descriptions of each embodiment in this application have different focuses, and parts not described in detail or in a certain embodiment can be referred to the relevant descriptions of other embodiments.

[0076] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. The technical features of the technical solution of this application can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are also included within the patent protection scope of this application, as long as the combination of these technical features does not contradict each other.

Claims

1. A multi-channel inductor device, characterized in that, include: magnetic core; A coil, the coil being placed within the magnetic core, the coil comprising spaced-apart opposing segments and at least one connecting segment located between the opposing segments and respectively connecting the opposing segments, the connecting segment dividing the spaced area between adjacent opposing segments into at least two magnetic circuit regions with unequal projected areas relative to the end face of the magnetic core, to provide multi-channel loop selection for the inductor. Each terminal pin has one end integrally connected to the lower end face of the magnetic core corresponding to the end of the opposing segment, and the other end of the terminal pin is connected to the upper end face of the magnetic core via the side of the magnetic core.

2. The multi-channel inductor device as described in claim 1, characterized in that, The coil is arranged in an 'H' shape in the vertical projection of the first direction, which is the extension direction of the upper / lower ends of the magnetic core.

3. The multi-channel inductor device as described in claim 2, characterized in that, The coil located within the magnetic core and the terminal pin are arranged in a 'V' shape in the vertical projection of the second direction, wherein the second direction is perpendicular to the first direction.

4. The multi-channel inductor device as described in claim 1, characterized in that, The magnetic core is integrally formed, and the coil is connected seamlessly within the magnetic core.

5. The multi-channel inductor device as described in claim 1, characterized in that, The magnetic core includes a first magnet and a second magnet connected to each other, and the coil is disposed between the first magnet and the second magnet.

6. The multi-channel inductor device as described in claim 1, characterized in that, The terminal pin includes an extension and an expansion portion. The end of the opposing segment is bent toward the extension and connected to one end of the extension to the lower end face of the magnetic core. The expansion portion is integrally connected to the other end of the extension portion, and the expansion portion is attached to the side of the magnetic core and extends to the upper end face of the magnetic core.

7. The multi-channel inductor device as described in claim 6, characterized in that, In the vertical projection in the second direction, the extension thins toward the expansion portion, and in the vertical projection in the first direction, the extension gradually widens toward the expansion portion until it is the same width as the expansion portion.

8. The multi-channel inductor device as described in claim 6, characterized in that, Let the cross-sectional area of ​​the extended portion be J1 and the cross-sectional area of ​​the opposing segment be J2, then 0.1≤J1 / J2≤5 and the thickness of the extended portion≤0.5mm.

9. The multi-channel inductor device as described in claim 3, characterized in that, The widths of adjacent opposing segments and connecting segments in the vertical projection of the first direction are not equal, and the length and width dimensions of each terminal pin in the vertical projection of the third direction or the first direction are the same, wherein the first direction, the second direction and the third direction are perpendicular to each other.

10. An electronic device, characterized in that, Including the multichannel inductor as described in any one of claims 1 to 9.

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