Multi-channel inductance device and electronic equipment

Abstract

The invention relates to the technical field of inductance devices, and discloses a multi-channel inductance device and electronic equipment, and the multi-channel inductance device comprises a magnetic core; the coil is arranged in the magnetic core and comprises opposite sections which are arranged at intervals and at least one communication section which is positioned between the opposite sections and is respectively connected with the opposite sections; the communication section divides a spacing area between the adjacent opposite sections into at least two magnetic circuit areas with unequal projection areas relative to the end surface of the magnetic core, so as to provide multi-channel loop selection of the inductor device; and one end of each terminal pin and the end part of the opposite section are correspondingly and integrally connected to the lower end surface of the magnetic core, and the other end of each terminal pin is connected to the upper end surface of the magnetic core through the side surface of the magnetic core. The functionality and flexibility of the inductance device are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inductive devices, and particularly relates to a multi-channel inductive device and an electronic device. BACKGROUND

[0002] An inductive device stores electric energy in the form of magnetic energy, has the characteristics of blocking alternating current and passing direct current, and has the functions of filtering, oscillating, delaying, trapping, screening signals, filtering noise, stabilizing current, and suppressing electromagnetic wave interference in a circuit. As a basic element in a circuit, the inductive device is widely used in various scenes.

[0003] In the related art, the current path and the magnetic flux path of a single inductive device are unique and determined after the inductive device is manufactured, and the inductance of the inductive device is a fixed value. When different inductances are required in circuit design, different specifications of inductive devices must be selected and soldered, which not only increases the material cost and the layout space of the target body, but also limits the flexibility and integration of circuit design. In addition, the external connection mode of the inductive device in the related art is single. When the circuit layout is limited by other high elements, structural elements or heat dissipation paths, the fixed mounting mode may cause wiring difficulties, space waste, or even failure to install, and it is difficult to meet the internal structural design requirements of increasingly complex and miniaturized electronic products. SUMMARY

[0004] In view of this, the present application provides a multi-channel inductive device and an electronic device to solve the above-mentioned technical problems.

[0005] In a first aspect, the embodiments of the present application disclose a multi-channel inductive device, comprising: a magnetic core; a coil, the coil is arranged in the magnetic core, the coil comprises opposite segments arranged at intervals, and at least one connecting segment located between the opposite segments and connected to the opposite segments respectively, the connecting segment divides the interval region between adjacent opposite segments into at least two magnetic path regions with different projection areas relative to the end face of the magnetic core, to provide multi-channel loop selection of the inductive device; a terminal pin, one end of each terminal pin is integrally connected to the lower end face of the magnetic core corresponding to the end of the opposite segment, 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.

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

[0007] In one possible example, the coil arranged in the magnetic core and the terminal pin are arranged in a 'J' structure in the vertical projection in a second direction, and the second direction is perpendicular to the first direction.

[0008] In one possible example, the magnetic core is integrally formed, and the coil is connected in the magnetic core without gap.

[0009] In one possible example, the magnetic core comprises a first magnetic body and a second magnetic body connected to each other, and the coil is arranged between the first magnetic body and the second magnetic body.

[0010] In one possible example, the terminal pin comprises an extension part and an expansion part, the end portions of the opposite segments are bent towards the extension part and connected to the lower end surface of the magnetic core at one end of the extension part, and the expansion part is integrally connected to the other end of the extension part and extends to the upper end surface of the magnetic core along the side surface of the magnetic core.

[0011] In one possible example, in the vertical projection of the second direction, the extension part is thinned towards the expansion part, and in the vertical projection of the first direction, the extension part is gradually expanded towards the expansion part until the width of the extension part is the same as that of the expansion part.

[0012] In one possible example, the cross-sectional area of the expansion part is J1, the cross-sectional area of the opposite segments is J2, 0.1≤J1 / J2≤5, and the thickness of the expansion part is ≤0.5 mm.

[0013] In one possible example, the widths of the opposite segments and the communication segments adjacent to the opposite segments in the vertical projection of the first direction are not equal, and the length and width 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] In the second aspect, the embodiments of the present application disclose an electronic device comprising the multi-channel inductor as described in any of the above embodiments.

[0015] In summary, compared with the prior art, the present application discloses a multi-channel inductor and an electronic device, the multi-channel inductor comprises a magnetic core, a coil and a terminal pin, the coil is arranged in the magnetic core, the coil comprises opposite segments arranged at intervals, and at least one communication segment arranged between the opposite segments and connected to the opposite segments, the communication segment divides the interval region between the adjacent opposite segments into at least two magnetic circuit regions with different projection areas relative to the end surface of the magnetic core, to provide multi-channel loop selection of the inductor, one end of each terminal pin is integrally connected to the lower end surface of the magnetic core corresponding to the end portion of the opposite segment, and the other end of the terminal pin is connected to the upper end surface of the magnetic core through the side surface of the magnetic core, that is, through the above arrangement, the functionality and flexibility of the inductor are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0017] Figure 1 is a perspective structural schematic diagram of a first multi-channel inductor device of the present application; Figure 2 is a cross-sectional structural schematic diagram of the first multi-channel inductor device of the present application; Figure 3 is a structural schematic diagram of a first coil of the present application; Figure 4 is a perspective structural diagram of the multi-channel inductor device of the present application in the top view direction; Figures 5a to 5e is a loop selection schematic diagram of the multi-channel inductor device of the present application; Figure 6 is an assembly structural schematic diagram of the first multi-channel inductor device of the present application; Figure 7 is an assembly structural schematic diagram of a second multi-channel inductor device of the present application; Figure 8 is a perspective structural schematic diagram of the second multi-channel inductor device of the present application; Figure 9 is Figure 8 is an internal structural schematic diagram of the multi-channel inductor device after hiding the second magnet; Figure 10 is a structural schematic diagram of a second coil of the present application. DETAILED DESCRIPTION

[0018] The exemplary embodiments will be described in detail herein with reference to the drawings. Unless otherwise specified, the same numbers in different drawings indicate the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the claims.

[0019] It should be noted that the terms "comprise", "contain" or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element, and in addition, components, features, elements with the same name in different embodiments of the application can have the same meaning or different meanings, and the specific meaning thereof should be determined in conjunction with the explanation thereof in the specific embodiment or further in conjunction with the context in the specific embodiment.

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

[0021] In the following description, the suffix used for an element such as "module", "part", or "unit" is merely intended for convenience of explanation of the present application, and does not have a specific meaning by itself. Thus, "module", "part", or "unit" can be mixedly used.

[0022] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and thus cannot be understood as indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0023] The technical solutions shown in the present application will be described in detail through specific embodiments. It should be noted that the description order of the following embodiments is not limited as the priority order of the embodiments.

[0024] Please refer to Figures 1 to 4 The multi-channel inductive device of the present application comprises a magnetic core 1, a coil 2, and a terminal pin 6.

[0025] In the specific implementation process, the coil 2 is placed in the magnetic core 1, the coil 2 comprises a plurality of spaced-apart opposite segments 3, at least one connecting segment 4 is located between the opposite segments 3 and connects the opposite segments 3, respectively, one end of each terminal pin 6 corresponds to the end of the opposite segment 3 and is integrally connected to the lower end surface 1b of the magnetic core 1, and the other end of the terminal pin 6 is connected to the upper end surface 1a of the magnetic core 1 through the side surface of the magnetic core 1.

[0026] Thus, the number of terminal feet 6 can correspond to the number of end portions of the opposite segments 3 and be distributed on the magnetic core 1, each terminal foot 6 being integrally connected with an end portion of the opposite segments 3, i.e. the terminal feet 6 can be regarded as part of the end of the opposite segments 3, and the coil 2 and the terminal feet 6 are integrated, so that the terminal feet 6 are more firmly combined with the magnetic core 1, and the integrated connection has high mechanical strength and can better withstand mechanical stress and thermal stress during installation and use, thereby improving the overall reliability of the device.

[0027] and the other end of the terminal feet 6 is connected to the upper end face 1a of the magnetic core 1 through the side face of the magnetic core 1, and this three-dimensional terminal foot structure design gives the multi-channel inductor device diversified installation methods, i.e. the terminal feet 6 are exposed to the upper end face 1a, the lower end face 1b and the side face of the magnetic core 1 at the same time, which provides the greatest degree of freedom for circuit design, and the device can be designed to be soldered from the top, soldered from the bottom, or soldered or mechanically bound using the side face, thereby being able to adapt to any harsh PCB layout and system structure requirements, and when all the terminal feet 6 are arranged in this way, they collectively form a metal frame around the magnetic core 1, which not only serves as an electrical connection point, but also effectively shields the internal magnetic field from leaking outward, reducing electromagnetic interference, and at the same time, the metal frame serves as an efficient heat dissipation network, which can quickly conduct the heat generated by the coil 2 from each surface of the magnetic core 1, greatly improving the heat dissipation capacity of the device.

[0028] i.e. the device can be surface-mounted like a traditional SMD component, or can be vertically mounted or side-soldered using the terminal feet 6 on the side face of the magnetic core 1, providing more possibilities for the three-dimensional layout and space optimization of the target recipient (such as a PCB), to adapt to various narrow or non-standard installation spaces and improve the flexibility of the device.

[0029] At the same time, when the device selects a traditional surface-mounting method, i.e. the terminal feet 6 integrally connected with the end portions of the opposite segments 3 to the lower end face 1b of the magnetic core 1 are connected to the target recipient, or the terminal feet 6 connected to the upper end face 1a of the magnetic core 1 are connected to the target recipient, the terminal feet 6 on the side face of the magnetic core 1 constitute a protective part on the side face of the magnetic core 1 in terms of physical structure, which can effectively mechanically protect the side face of the magnetic core 1, and in actual application scenarios, if other components or tools accidentally touch the side face of the device during subsequent assembly or maintenance, they will first touch the terminal feet 6 rather than the relatively fragile magnetic core 1 itself, which is equivalent to setting a "guardrail" for the side face of the magnetic core 1, thereby effectively preventing the corners of the magnet from being damaged or the whole magnet from being damaged due to accidental collision or scratching, and improving the reliability of the device during production and use.

[0030] Preferably, the coil 2 is transversely arranged in the magnetic core 1, specifically, the "transversely arranged" means that the extension plane of the main part of the coil 2, i.e. the effective conducting loop (formed by the opposite segments 3 and the connecting segments 4), is parallel to the upper / lower end surface of the magnetic core 1 and is encapsulated by the magnetic core 1, so that the magnetic flux path of the device is more easily guided and constrained by the magnetic core material, and the opposite segments 3 of the coil 2 can naturally extend towards the edge of the magnetic core 1, thereby realizing diversified installation of the device.

[0031] In a preferred implementation of the embodiment, the unique structure of the coil 2 is designed to precisely shape the magnetic circuit inside the magnetic core 1. Specifically, the connecting segments 4 divide the spacing area 5 between adjacent opposite segments 3 into at least two magnetic circuit areas with different projection areas relative to the end surface of the magnetic core 1, to provide multi-channel loop selection for the inductor device. This design is the core of the multi-functionality of the device. The magnetic circuit areas with different areas mean that when current flows through the coil 2, 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 formed by the opposite segments 3 and the connecting segments 4. Different loops will dominantly use their corresponding specific area magnetic circuit areas as the main magnetic flux path, thereby directly leading to different inductance values presented by the device. Thus, a single inductor device can provide multi-channel loop selection, achieving the key effect of a device having multiple different inductance values, greatly improving the integration and application flexibility of the device.

[0032] Meanwhile, the selection of different terminal pins 6 means that the current will flow through the conducting loops formed by different opposite segments 3 and connecting segments 4. When any selected loop is working, the opposite segments 3 that do not have current flowing through them are not just idle. These opposite segments 3 without current can serve as effective heat conduction paths to assist the device in heat dissipation. Specifically, the Joule heat generated by the energized conducting wire during device operation can be transferred to these non-working opposite segments 3 through the coil itself and the surrounding magnetic core material, which significantly increases the effective heat exchange area with the internal magnetic core 1 and the external environment, thereby accelerating the rate of heat generated by the device to diffuse to the outside.

[0033] Therefore, all parts of the coil 2, whether they participate in conduction or not, together form a distributed internal heat dissipation network, which, combined with the large area characteristics of the magnetic core 1 itself, effectively improves the overall heat dissipation capability 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 device is connected with the terminal pin 6b at one end of the opposite segment 3a and the terminal pin 6d at one end of the opposite segment 3b to the pads 101 and 102 of the PCB 10 respectively, and the terminal pin 6a at the other end of the opposite segment 3a and the terminal pin 6c at the other end of the opposite segment 3b are idle, then the current path of the coil 2 of the inductor device in this state presents the fourth Z-Y flow direction, and further corresponds to the fourth inductance; As shown in 5e, the terminal pin 6a at one end of the opposite segment 3a and the terminal pin 6c at one end of the opposite segment 3b of the inductor device are commonly connected to the pad 102 of the PCB 10, and the terminal pin 6b at the other end of the opposite segment 3a and the terminal pin 6d at the other end of the opposite segment 3b are commonly connected to the pad 102 of the PCB 10, then the current path of the coil 2 of the inductor device in this state presents the fifth Z-Y flow direction, and further corresponds to the fifth inductance.

[0040] Then, referring to the above-mentioned five multi-channel loop selection designs of the examples, the multi-channel inductor device of the present application can force the current to flow through different loops formed by the opposite segments 3 and the connecting segments 4 by selecting different terminal pins 6 as the input and output terminals of the current, and different loops can dominantly use their corresponding specific volume of the magnetic path as the main magnetic flux path, thereby directly leading to different inductances finally presented by the device, thereby providing multiple channel loop selection for a single inductor device, realizing the key effect that one device has multiple different inductances, and greatly improving the integration and application flexibility of the device.

[0041] Continue to combine Figure 4 In one key design detail of the present embodiment, the projection size of the coil 2 and the terminal pin 6 is specifically optimized, specifically, the widths of the adjacent opposite segments 3 and the connecting segments 4 in the vertical projection of the magnetic core 1 in the first direction are not equal (K1≠K2≠K3). Figure 4 The difference design is not random, different terminal pin 6 connection modes correspond to different current paths and working inductances, the present application sets K1≠K2≠K3 to accurately set the cross-sectional area of each segment conductor (the projection width is directly related to the cross-sectional area), so that each current path has a current carrying capacity that matches its expected working inductance, for example, the opposite segment 3 or the connecting segment 4 mainly passed by the low inductance and large current path is designed to have a larger width (cross-sectional area) to reduce its DC resistance and ensure that it has a higher rated current; on the contrary, for the high inductance path, it can be adjusted appropriately, which ensures that the device can have corresponding and appropriate rated currents under multiple working inductances, avoiding that a certain path becomes the bottleneck of the performance of the entire device due to insufficient current carrying capacity.

[0042] Meanwhile, the coil 2 and the magnetic core 1 are in a "competition" relationship on a limited cross-sectional area. By adjusting the width of each section of the coil 2 instead of using a uniform width or narrow width, a more reasonable distribution of the cross-sectional area occupied by the coil 2 and the cross-sectional area occupied by the magnetic core can be achieved. This dynamic distribution allows sufficient magnetic path 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 uses conductors as heat bridges in areas requiring high heat dissipation efficiency. Ultimately, the key performance indicators of the inductor device, such as inductance, saturation current, heat dissipation efficiency, and DC resistance, are optimized in coordination, achieving the most balanced state of comprehensive performance, rather than pursuing the extreme of a single indicator.

[0043] In addition, the length and width of each terminal pin 6 in the vertical projection of the third direction or the first direction of the magnetic core 1 are the same, i.e., the length and width of each terminal pin 6 in the vertical projection of the upper / lower end surface or the left / right side surface of the magnetic core 1 are the same, thereby ensuring the consistency of all external electrical connection points, avoiding the distortion, deviation, and misalignment caused by uneven stress on the terminal pin 6 during inductance mounting, and providing a reliable and standardized external interface for the above-mentioned complex internal performance optimization to ensure the soldering yield of large-scale production of the device.

[0044] Optionally, the magnetic core 1 is arranged in a rectangular body structure, and the magnetic core 1 corresponds to 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 implementation of the embodiment, one end of each terminal pin 6 is integrally connected to the lower end surface 1b of the magnetic core 1 corresponding to the end of the opposite section 3, and the other end of the terminal pin 6 is connected to the upper end surface 1a of the magnetic core 1 through the side surface of the magnetic core 1, wherein the end of the opposite section 3 is bent towards the terminal pin 6 and integrally connected to the lower end surface 1b of the magnetic core 1 at one end of the terminal pin 6.

[0046] Thus, based on the bending structure design of the end of the opposite section 3, the end of the opposite section 3 and the terminal pin 6 form an "L" shaped bending path in the magnetic core 1, which not only ensures a very high bonding strength and stability between the terminal pin 6 and the magnetic core 1, avoiding the risk of stress concentration or loosening caused by external bending, but also creates installation surfaces on the lower end surface 1b and the side surface of the magnetic core 1, thereby providing diversified installation methods for the device.

[0047] In one example, the coil 2 located in the magnetic core 1 and the terminal pin 6 are arranged in a'se' shape structure in the vertical projection of the second direction, specifically, the'se' shape projection structure is explicitly presented from top to bottom by the following parts, the horizontal line segment representing the opposite section 3 located at the upper part of the projection, the extension line segment representing the end of the opposite section 3 extending downward from both ends of the horizontal line segment and towards the lower end surface 1b of the magnetic core 1, and the terminal pin 6 part representing the end of the opposite section 3 integrally connected to the lower end surface 1b of the magnetic core 1 extending horizontally outward from the end of the extension line segment.

[0048] Further, in order to optimize the magnetic circuit structure and balance the device performance, the position of the coil 2 transversely arranged in the magnetic core 1 is precisely designed in the embodiment, specifically, the vertical distance between the opposite section 3 and the upper end surface 1a of the magnetic core 1 is set as H1, and the vertical distance between the opposite section 3 and the lower end surface 1b of the magnetic core 1 is set as H2, then 0.5≤H1 / H2≤2.

[0049] Therefore, the symmetry of the magnetic circuit of the device is ensured, and the performance deviation is avoided. When the H1 / H2 ratio deviates too much, it means that the opposite section 3 is too close to the lower end surface 1b or the upper end surface 1a, which will cause the serious asymmetry of the magnetic resistance of the upper and lower magnetic circuits. This makes the key parameters such as inductance and saturation current have unexpected and excessive differences when selecting different circuits, which is not conducive to the stability and prediction of performance. When H1 / H2 is between 0.5 and 2, the coil 2 is approximately in the center area of the magnetic core 1, which can provide a relatively balanced magnetic flux path for the upper and lower magnetic circuits, so that the device can show stable and consistent electrical performance in different installation attitudes and working modes.

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

[0051] In order to further consolidate the above effects, preferably, the vertical distance between the opposite section 3 and the upper end surface 1a of the magnetic core 1 is set as H1, and the vertical distance between the opposite section 3 and the lower end surface 1b of the magnetic core 1 is set as H2, then 0.75≤H1 / H2≤1.

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

[0053] In a preferred implementation of the embodiment, the three-dimensional wrap-around terminal leg 6 is further divided into two functional segments, an extension 61 and an expansion 62, to optimize the manufacturing process and functional characteristics. Specifically, the terminal leg 6 is configured to include the extension 61 and the expansion 62, and the end of the opposing segment 3 is bent towards the extension 61 and connected to the lower end surface 1b of the magnetic core 1 at one end of the extension 61, and the expansion 62 is integrally connected to the other end of the extension 61 and adheres to the side surface of the magnetic core 1 and extends to the upper end surface 1a of the magnetic core 1.

[0054] The end of the opposing segment 3 is then bent towards the extension 61, and the two are connected to the lower end surface 1b of the magnetic core 1, and the connection point constitutes the electrical and mechanical anchor point of the terminal leg 6 on the lower surface 1b of the magnetic core 1. Then, the expansion 62 is integrally connected to the other end of the extension 61, and the expansion 62 closely adheres to the side surface of the magnetic core 1 and extends upward, and finally the end of the expansion 62 away from the extension 61 extends to the upper end surface 1a of the magnetic core 1, and optionally is bent to adhere to the upper end surface 1a of the magnetic core 1, forming an upper electrical connection point.

[0055] Thus, the terminal leg 6 is divided into the extension 61, which is mainly responsible for electrical connection in the direction of the lower end surface 1b of the magnetic core 1, and the expansion 62, which is mainly responsible for adhering to the side surface of the magnetic core 1 and reinforcing and electrically connecting the terminal structure in the direction of the upper end surface 1a of the magnetic core 1, to allow independent optimization of different parts. For example, the extension 61 can prioritize device conductivity, while the expansion 62 can prioritize the adhesion area to the magnetic core 1 to achieve optimal structural connection strength, heat dissipation, and shielding effect.

[0056] Based on the structural design of the extension 61 and the expansion 62, as shown in Figure 6 and Figure 7 the multi-channel magnetic device can be designed to be soldered from the top, soldered from the bottom, or soldered or mechanically bound with the side surface, thereby adapting to any demanding PCB layout and system structure requirements. When all terminal legs 6 are arranged in this manner, they collectively form a metal frame around the magnetic core 1, which not only serves as an electrical connection point but also effectively shields the internal magnetic field from leaking outward, reducing electromagnetic interference. At the same time, the metal frame serves as an efficient heat dissipation network, quickly conducting heat generated by the coil 2 from each surface of the magnetic core 1, greatly improving the device's heat dissipation capacity. The device can be surface-mounted like traditional SMD components, or vertically mounted or side-soldered using the side surface terminal leg 6 part of the magnetic core 1, providing more possibilities for three-dimensional layout and space optimization of the PCB 10, to adapt to various narrow or non-standard installation spaces and improve the flexibility of the device.

[0057] In one example, continuing with Figure 3 and Figure 4In the perpendicular projection of the second direction, the extension 61 is thinned towards the expansion 62, and in the perpendicular projection of the first direction, the extension 61 is tapered towards the expansion 62 until the same width as the expansion 62, thereby, through the tapered design of the extension 61, the cross-sectional area that may be lost due to the thickness thinning is compensated, which makes the extension 61 in the key passage area the cross-sectional area of the conductor can be maintained at the size necessary for device application, ensuring sufficient current carrying capacity and low DC resistance, while the tapered shape also provides more stable mechanical support for the connection part.

[0058] Synchronously, through the thinning design, the thickness of the extension 61 in the bending area structure connected with the expansion 62 is reduced, so that in this bending process, a smaller and smoother bending fillet can be formed. This controlled fillet is crucial for the side soldering process and subsequent automatic optical inspection (AOI) in modern electronic device assembly, which ensures that the solder can form a uniform and continuous soldering meniscus during device application, avoiding the inability of solder to climb or detection errors caused by excessive or irregular fillets, thereby ensuring the testability and accuracy of the device side soldering AOI, and improving the production yield.

[0059] Optionally, the extension 61 is thinned to less than or equal to 0.5mm towards the expansion 62, i.e. the thickness of the expansion 62 is less than or equal to 0.5mm. This size limit directly determines that the fillet radius R formed at the bending between the extension 61 and the expansion 62 is less than or equal to 0.5mm.

[0060] It can be understood that in the surface mount technology (SMT) process, solder will climb along the side of the terminal pin 6 to form a "soldering" meniscus, and the AOI equipment detects the soldering height and shape through optical imaging to judge the welding quality. An excessively large (such as more than 0.5mm) bending fillet will form an irregular curved transition, which will seriously interfere with the formation of the soldering meniscus, resulting in insufficient soldering height or irregular shape. At the same time, this irregular geometry will also interfere with the imaging light of the AOI, forming shadows or reflections, thereby causing detection errors.

[0061] Therefore, by controlling the thickness of the expansion 62 and the corresponding bending fillet to be less than or equal to 0.5mm, the geometry of the bending area can be ensured to be regular and sharp, thereby allowing the solder to form a full, continuous and clear soldering meniscus, providing a high-contrast, interference-free clear image for AOI detection, ensuring the testability and accuracy of the side soldering AOI detection, and improving the welding quality monitoring level and reliability of the device in mass production.

[0062] Further, to ensure that the impedance is reasonably matched and the performance is balanced when the current flows through different components of the coil 2, the cross-sectional area proportions of the key conductors in the embodiment are precisely defined. Specifically, the cross-sectional area of the expansion part 62 is J1, the cross-sectional area of the opposing section 3 is J2, and 0.1≤J1 / J2≤5. Thus, the continuity of the current path of the coil 2 is ensured, and local overheating is avoided. The lower limit of J1 / J2 ensures that the expansion part 62 has basic current carrying capacity. If J1 / J2 is too small, when the current flows from the opposing section 3 with a large cross-sectional area to the expansion part 62 with a small cross-sectional area, a bottleneck effect will occur at the connection due to the sudden increase in current density, causing the direct current resistance of the part to abnormally increase, causing local overheating, which becomes the bottleneck of the performance and reliability of the entire device. The upper limit of J1 / J2 prevents the expansion part 62 from being unnecessarily oversized. If J1 / J2 is too large, although the resistance of the expansion part 62 itself is reduced, material is wasted, and the terminal leg 6 may become bulky and occupy too much external space, which contradicts the original design intention of miniaturization of the device. The design of 0.1≤J1 / J2≤5 makes the current carrying capacity of the expansion part 62 and the current carrying capacity of the opposing section 3 be in a coordinated order of magnitude, which ensures that there is no obvious weak link in the entire path from the internal loop to the external terminal, and the current carrying capacity, temperature rise, and space utilization of the device are balanced to achieve the best comprehensive balance.

[0063] In one example, the magnetic core 1 is integrally formed, and the coil 2 is connected without gaps in the magnetic core 1. Specifically, the magnetic core 1 is integrally formed by one-time compression molding of soft magnetic powder and glue. In this process, the pre-bent and formed coil 2 is precisely positioned and fixed in the mold, and then the soft magnetic powder and glue are filled around it under high pressure and solidified to form a dense magnetic core structure. Thus, the coil 2 is completely embedded in the magnetic core 1 without gaps, so that there is no cavity or loose interface between the coil 2 and the magnetic core 1, making them a solid whole that can effectively resist mechanical vibration and impact, as well as thermal stress caused by temperature cycling, greatly improving the structural integrity and long-term service life of the device.

[0064] In addition, the coil 2 is in close contact without gaps, and the heat generated by the coil 2 during operation can be efficiently conducted to the entire magnetic core 1 through the large contact area, and then dissipated to 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 load.

[0065] And, the integrally formed magnetic core 1 ensures the uniformity and consistency of the magnetic circuit structure, avoids the magnetic resistance change or local magnetic saturation phenomenon caused by the internal gap, so that the inductance, saturation current and other key parameters of the device have higher precision and batch consistency. The coil 2 is connected without gap in the magnetic core 1, which means that the conductor is embedded in a completely dense magnetic material environment, which eliminates the air gap between the coil 2 and the magnetic core 1, so that the magnetic lines of force can pass through the low magnetic resistance magnetic core material without obstruction, tightly surround the conductor, and avoid magnetic leakage defects.

[0066] In one example, the multi-channel magnetic device adopts a split magnetic core structure to realize convenient assembly, referring to Figure 8 and Figure 9 The magnetic core 1 includes a first magnet 11 and a second magnet 12 connected to each other, and the coil 2 is arranged between the first magnet 11 and the second magnet 12.

[0067] That is, the pre-formed coil 2 is positioned and placed in the preset position of the first magnet 11 or the second magnet 12, and then the other magnet is aligned and hot-pressed, so that the coil 2 is gaplessly embedded between the first magnet 11 and the second magnet 12.

[0068] Optionally, when the coil 2 is placed in the 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. Then, taking the coil 2 placed in the preset position of the first magnet 11 as an example, the first magnet 11 and the coil 2 thereon can be pre-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 slightly softens and plastically flows, thereby filling and completely fusing the initial gap between the first magnet 11 and the coil 2. The pre-pressing temperature can include 180±15°, and is preferably 175°.

[0069] Then, the split pressing structure allows the complex coil 2 to be pre-placed on one magnet and then hot-pressed to simplify the production process. After hot-pressing of the first magnet 11 and the second magnet 12, the contact interface can form a dense connection through plastic deformation or colloidal adhesion of the soft magnetic material itself, which makes the coil 2 be firmly clamped and wrapped inside the magnetic core 1, realizing the gapless connection of 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] Although the structure is split, the two magnet interfaces can be highly attached through thermal compression, which can minimize the high magnetic resistance caused by the assembly gap in the magnetic circuit, so that the magnetic lines can still close in a nearly complete low magnetic resistance path, which significantly suppresses the device magnetic leakage and ensures the stability and consistency of the device inductance.

[0071] Optionally, in another means to enhance the mechanical strength and long-term reliability of the combination of the first magnet 11 and the second magnet 12, the first magnet 11 and the second magnet 12 can also be fixed by adhesion, that is, a layer of adhesive can be pre-applied or provided on the bonding surface of the first magnet 11 and / or the second magnet 12, or the adhesive can also be applied or provided on part of the coil 2, and then the first magnet 11 and the second magnet 12 are adhered together to ensure that the device has extremely high mechanical strength and efficient assembly efficiency.

[0072] Reference Figure 10 In the more complex configuration of the present embodiment, the magnetic circuit design can have higher flexibility and refinement, specifically, a plurality of connecting sections 4 are connected between adjacent opposing sections 3, and each connecting section 4 is connected to the non-central part of the opposing section 3, thereby achieving fine segmentation and multiple inductance selection of the magnetic circuit.

[0073] It can be understood that a single connecting section 4 will divide the interval region 5 between two opposing sections 3 into two magnetic circuit regions, and multiple connecting sections 4 will divide the interval region 5 into three or more sub-magnetic circuit regions with different connection point positions and different areas and shapes. When the current flows through different connecting sections 4, the dominant magnetic flux path it excites will traverse these different sub-magnetic circuit region combinations. Since the magnetic resistance characteristics of each sub-magnetic circuit region are different, a single device can provide more inductance values with finer differences, thereby greatly expanding the channel selection range and application scenarios of the device.

[0074] The present application also discloses an electronic device comprising the multi-channel inductor device of any of the above embodiments. For other working principles and processes of the electronic device of the present embodiment, please refer to the above description of the multi-channel inductor device of the present embodiment.

[0075] The multi-channel inductor device and electronic device provided by the present application are described in detail above, and specific examples are used to describe the principles and implementation modes of the present application. It should be noted that the description of each embodiment in the present application has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0076] The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application, and each technical feature of the technical solutions of the present application can be combined arbitrarily, in order to make the description simple, each technical feature in the above embodiments is not described all possible combinations, any equivalent structure or equivalent flow conversion made by using the content of the present application and the drawings, or directly or indirectly applied in other related technical fields, as long as the combination of these technical features does not exist contradiction, all are included in the patent protection scope of the present application.

Claims

1. A multi-channel inductive device, characterized by, The magnetic core comprises: a magnetic core; a coil disposed in the magnetic core, the coil comprising opposite segments arranged at intervals, and at least one connecting segment between the opposite segments and connecting the opposite segments respectively, the connecting segment dividing the interval between adjacent opposite segments into at least two magnetic path areas with different projection areas on the end face of the magnetic core, to provide multi-channel loop selection of the inductor device; terminal pins, one end of each of the terminal pins being integrally connected to the lower end face of the magnetic core at the end of the opposite segment, and the other end of the terminal pin being connected to the upper end face of the magnetic core through the side face of the magnetic core.

2. The multichannel inductive device of claim 1, wherein, The coil is arranged in an 'H' shape in the vertical projection in the first direction, which is the extension direction of the upper / lower end of the magnetic core.

3. The multichannel inductive device of claim 2, wherein, The coil and the terminal pins are arranged in a 'U' shape in the vertical projection in the second direction, which is perpendicular to the first direction.

4. The multichannel inductive device of claim 1, wherein, The magnetic core is integrally formed, and the coil is connected in the magnetic core without gaps.

5. The multichannel inductive device of claim 1, wherein, The magnetic core comprises a first magnetic body and a second magnetic body connected to each other, and the coil is disposed between the first magnetic body and the second magnetic body.

6. The multichannel inductive device of claim 1, wherein, The terminal pin comprises an extension part and an expansion part, the end of the opposite segment is bent towards the extension part and connected to the lower end face of the magnetic core at one end of the extension part, and the expansion part is integrally connected to the other end of the extension part and extends to the upper end face of the magnetic core by adhering to the side face of the magnetic core.

7. The multichannel inductive device of claim 6, wherein, In the vertical projection in the second direction, the extension part is thinned towards the expansion part, and in the vertical projection in the first direction, the extension part is gradually expanded towards the expansion part until the width of the extension part is the same as that of the expansion part.

8. The multichannel inductive device of claim 6, wherein, The cross-sectional area of the expansion part is J1, and the cross-sectional area of the opposite segment is J2, then 0.1≤J1 / J2≤5, and the thickness of the expansion part is ≤0.5mm.

9. The multichannel inductive device of claim 3, wherein, The widths of adjacent opposite segments and connecting segments in the vertical projection in the first direction are not equal, and the length and width dimensions of each terminal pin in the vertical projection in 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, comprising: The multi-channel inductor device comprises any one of claims 1 to 9.

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