Inductor, circuit board group and electronic equipment

Abstract

The embodiment of the utility model relates to the technical field of inductors, and discloses an inductor, a circuit board group and electronic equipment, the inductor comprises a first magnetic core, a second magnetic core and a coil circuit board, the first magnetic core comprises a first body, a first convex part and a second convex part, the second magnetic core comprises a second body, a third convex part and a fourth convex part, the third convex part and the fourth convex part are arranged on the second body at an interval, the first convex part and the third convex part are bonded and fixed to form a first middle column, the second convex part and the fourth convex part are bonded and fixed to form a second middle column, and the first middle column and the second middle column penetrate through the coil circuit board in the first direction; and a first coil and a second coil on the coil circuit board respectively surround the first middle column and the second middle column. By means of the mode, the coil is formed on the coil circuit board, an enameled wire does not need to be wound on the annular magnetic core, the assembly process of the inductor is simplified, and the assembly difficulty is reduced.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of inductors, and in particular to an inductor, a circuit board assembly, and an electronic device. Background Art

[0002] Inductors are used to suppress interference signals and improve the electromagnetic compatibility of electronic devices, making them crucial components. Traditional wire-wound inductors consist of an enameled coil and a toroidal core. During assembly, the enameled coil must be wound around the toroidal core in turns. For high-power electronic devices, the large number of turns required complicates assembly, and the inductor is thick and occupies a large volume. Utility Model Content

[0003] The main technical problem solved by the embodiments of the present invention is to provide an inductor, a circuit board assembly and an electronic device, which can reduce the difficulty of assembling the inductor and improve the assembly efficiency.

[0004] In order to solve the above technical problems, a technical solution adopted in an embodiment of the present invention is: to provide an inductor, including a first magnetic core, a second magnetic core and a coil circuit board, the first magnetic core includes a first body, a first protrusion and a second protrusion, and the first protrusion and the second protrusion are arranged at intervals on the first body; the second magnetic core includes a second body, a third protrusion and a fourth protrusion, and the third protrusion and the fourth protrusion are arranged at intervals on the second body, the end of the first protrusion away from the first body is bonded and fixed to the end of the third protrusion away from the second body, and the end of the second protrusion away from the first body is bonded and fixed to the end of the fourth protrusion away from the second body, wherein the first protrusion and the third protrusion constitute a first center column, and the second protrusion and the fourth protrusion constitute a second center column; the coil circuit board is located between the first body and the second body, and the first surface of the coil circuit board is provided with a first coil and a second coil, and the first center column and the second center column are both arranged on the coil circuit board along the first direction. When viewed along the first direction, the first coil surrounds the first center column, and the second coil surrounds the second center column, wherein the first surface faces the first body, and the first direction is perpendicular to the first surface. In this embodiment, by arranging the first coil and the second coil on the coil circuit board, when assembling the inductor, it is only necessary to install the coil circuit board to the first magnetic core, and make the first coil surround the first protrusion, and the second coil surround the second protrusion, and then glue and fix the third protrusion of the second magnetic core to the first protrusion, and glue and fix the fourth protrusion to the second protrusion. There is no need to perform winding operations, which is beneficial to reducing the difficulty of assembling the inductor and improving assembly efficiency.

[0005] In some embodiments, the inductor further includes a first insulating member disposed between the coil circuit board and the first magnetic core to insulate the coil circuit board from the first magnetic core. Providing the first insulating member can reduce the risk of the coil circuit board being short-circuited by the first magnetic core.

[0006] In some embodiments, the first insulating member is an insulating plate, which is arranged between the coil circuit board and the first body, and along the first direction, the projection of the first coil and the projection of the second coil are both located within the projection of the first insulating member. When observed along the first direction, there is a gap between the first coil and the first center column, and there is a gap between the second coil and the second center column.

[0007] In some embodiments, the first insulating member is an insulating film, and the insulating film covers a surface of the first coil and a surface of the second coil.

[0008] In some embodiments, the inductor further includes a second insulating member disposed between the coil circuit board and the second magnetic core to insulate the coil circuit board from the second magnetic core. The provision of the second insulating member reduces the risk of the second magnetic core short-circuiting the internal circuitry of the coil circuit board, thereby improving the operational stability of the inductor.

[0009] In some embodiments, the number of the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion is multiple, a first protrusion and a third protrusion are bonded and fixed to form a first center column, and a second protrusion and a fourth protrusion are bonded and fixed to form a second center column; the multiple first center columns and the multiple second center columns are all arranged along the first direction through the coil circuit board, and the first surface of the coil circuit board is provided with multiple first coils and multiple second coils. When viewed along the first direction, a first coil surrounds a first center column, a second coil surrounds a second center column, and the multiple first coils are connected in series, and the multiple second coils are connected in series. In this embodiment, by providing multiple first coils and multiple second coils, the inductance of the inductor can be increased, so that it can be used in higher-power electronic devices.

[0010] In some embodiments, there are multiple coil circuit boards, which are stacked along a first direction and positioned between the first and second bodies. In this embodiment, by providing multiple coil circuit boards, the inductor's inductance can be increased, allowing it to be used in higher-power electronic devices.

[0011] In some embodiments, a third insulating member is provided between each two adjacent coil circuit boards to insulate the coil circuit boards from each other. By providing the third insulating member between each two adjacent coil circuit boards, mutual interference between the coil circuit boards can be reduced.

[0012] To solve the above technical problems, another technical solution adopted in an embodiment of the present invention is: providing a circuit board group, including the above-mentioned inductor, and also including a main circuit board, the coil circuit board is arranged on the main circuit board, and the coil circuit board is electrically connected to the main circuit board.

[0013] In order to solve the above technical problems, another technical solution adopted in an embodiment of the present utility model is: to provide an electronic device, including the above circuit board group.

[0014] The beneficial effects of the embodiment of the present invention are as follows: Different from the prior art, in the embodiment of the present invention, the first magnetic core includes a first body, a first protrusion and a second protrusion, and the first protrusion and the second protrusion are spaced apart from the first body; the second magnetic core includes a second body, a third protrusion and a fourth protrusion, and the third protrusion and the fourth protrusion are spaced apart from the second body; by arranging the first coil and the second coil on the coil circuit board, when assembling the inductor, it is only necessary to install the coil circuit board to the first magnetic core, and make the first coil surround the first protrusion, and the second coil surround the second protrusion, and then glue and fix the third protrusion of the second magnetic core to the first protrusion, and glue and fix the fourth protrusion to the second protrusion, without the need for winding operation, which is conducive to reducing the difficulty of assembling the inductor and improving assembly efficiency. Moreover, the first coil and the second coil are arranged on the circuit board, which effectively reduces the overall thickness and occupied volume of the inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic structural diagram of the inductor provided in an embodiment of the present utility model when the first insulating member is hidden;

[0017] Figure 2 This is a schematic structural diagram of a first magnetic core and a second magnetic core provided in an embodiment of the present utility model;

[0018] Figure 3 Schematic diagram of the decomposed structure of the inductor provided in the embodiment of the present utility model;

[0019] Figure 4 This is a schematic structural diagram of a coil circuit board provided in an embodiment of the present utility model;

[0020] Figure 5 This is a schematic structural diagram of a circuit board assembly provided in an embodiment of the present invention at a first viewing angle;

[0021] Figure 6 It is a structural schematic diagram of the circuit board assembly provided in an embodiment of the present utility model at a second viewing angle.

[0022] Figure Numbers

[0023] DETAILED DESCRIPTION

[0024] For the convenience of understanding the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like as used in the present specification to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0025] Unless otherwise defined, all technical and scientific terms used in the present specification have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more related listed items.

[0026] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0027] The existing inductor usually needs to wind the enameled coil on the annular magnetic core turn by turn during the assembly process. For high-power electronic devices, the enameled coil needs to be wound for a large number of turns, and the winding process is complicated and time-consuming. For small-power electronic devices, the annular magnetic core has a small volume, and the space for winding the coil is small, and the operation is difficult. After winding, the inductor is thick and occupies a large volume.

[0028] In addition, the winding of the coil is usually performed manually, and during winding, the coil may be wound too much, too little, or unevenly, which can cause the inductor to fail to meet the specified use requirements and affect the yield during the inductor assembly process.

[0029] To solve the above problems, the application provides an inductor, a circuit board set and an electronic device. By arranging the coil on the coil circuit board (specifically, arranging the first coil and the second coil on the circuit board, i.e., arranging the coil winding on the circuit board in a manner similar to a PCB), and mounting the coil circuit board between the first magnetic core and the second magnetic core, the first coil and the second coil are both arranged around the convex portions of the first magnetic core and the second magnetic core which are fixedly bonded. Since the coil is arranged on the coil circuit board, there is no need for winding operation, which is conducive to reducing the assembly difficulty of the inductor, improving the assembly efficiency, and compared with the existing winding structure, the overall thickness of the inductor of the application is lower, and the occupied volume is smaller.

[0030] The specific schemes of the application will be described in detail below.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3 , the inductor 10 includes a first magnetic core 1, a second magnetic core 2 and a coil circuit board 5.

[0032] The first magnetic core 1 includes a first body 11, a first convex portion 12 and a second convex portion 13, the first body 11 is in a plate shape, and the first convex portion 12 and the second convex portion 13 are arranged on the surface of the first body 11.

[0033] The second magnetic core 2 includes a second body 21, a third convex portion 22 and a fourth convex portion 23, the second body 21 is in a plate shape, and the third convex portion 22 and the fourth convex portion 23 are arranged on the second body 21.

[0034] The end of the first convex portion 12 away from the first body 11 is fixedly bonded with the end of the third convex portion 22 away from the second body 21, so that the first convex portion 12 and the third convex portion 22 jointly form a first pillar 3. The end of the second convex portion 13 away from the first body 11 is fixedly bonded with the end of the fourth convex portion 23 away from the second body 21, so that the second convex portion 13 and the fourth convex portion 23 jointly form a second pillar 4.

[0035] The coil circuit board 5 is located between the first body 11 and the second body 21, and the first surface 51 of the coil circuit board 5 is provided with a first coil 511 and a second coil 512, and the first coil 511 and the second coil 512 are spaced apart from each other. Among them, the first surface 51 of the coil circuit board 5 faces the first body 11, and the first surface 51 is parallel to the first body 11. Along the first direction X, the first pillar 3 and the second pillar 4 both pass through the coil circuit board 5, and as viewed along the first direction X, the first coil 511 surrounds the first pillar 3, and the second coil 512 surrounds the second pillar 4, so that the above-mentioned first magnetic core 1, second magnetic core 2 and coil circuit board 5 jointly form an inductor 10, wherein the first direction X is perpendicular to the first surface 51.

[0036] In this embodiment, by arranging the first coil 511 and the second coil 512 on the coil circuit board 5, when assembling the inductor 10, the coil circuit board 5 can be first installed on the first magnetic core 1, and the first coil 511 can be wrapped around the first protrusion 12, and the second coil 512 can be wrapped around the second protrusion 13. Then, the third protrusion 22 can be glued and fixed to the first protrusion 12, and the fourth protrusion 23 can be glued and fixed to the second protrusion 13. The assembly of the inductor 10 can be completed without the need for winding operation, which simplifies the assembly process and reduces the difficulty of assembly, thereby improving the assembly efficiency of the inductor 10.

[0037] It is worth noting that the forming process of the first coil 511 and the second coil 512 is: copper is coated on one surface of the coil circuit board 5, and then a mold is used to cover the part of the copper that needs to be retained, and then the part of the copper not covered by the mold is etched by an etching solution, leaving the part of the copper covered by the mold. The remaining copper constitutes the first coil 511, the second coil 512 and the circuit structure for connecting each coil on the coil circuit board (not shown in the figure). Therefore, in the present application, compared with manual winding, the present application forms the first coil 511 and the second coil 512 by a mold, which reduces the risk of too few or too many turns of the coil, and can improve the uniformity of each coil, ensuring that the inductor 10 can meet the use requirements and improve the yield rate of the inductor 10.

[0038] In some embodiments, see Figure 3 and Figure 4 The coil circuit board 5 is provided with a first through hole 52 and a second through hole 53, each of which connects the first surface 51 and the second surface 54 of the coil circuit board 5. The first center post 3 passes through the first through hole 52, and the second center post 4 passes through the second through hole 53. Along the first direction X, the projection of the first center post 3 is located within the first through hole 52, and the projection of the second center post 4 is located within the second through hole 53. This facilitates the first protrusion 12 to pass through the first through hole 52, and the second protrusion 13 to pass through the second through hole 53 when the coil circuit board 5 is mounted on the first magnetic core 1.

[0039] In some embodiments, see Figure 3 The inductor 10 also includes a first insulating member 6, which is arranged between the coil circuit board 5 and the first magnetic core 1. The first insulating member 6 is used to achieve insulation between the coil circuit board 5 and the first magnetic core 1 to prevent the first magnetic core 1 from short-circuiting the first coil 511 or the second coil 512 and affecting the performance of the inductor 10.

[0040] In some embodiments, see Figure 3The first insulating member 6 is an insulating plate, and is arranged between the coil circuit board 5 and the first body 11. In the first direction X, the projection of the first coil 511 and the projection of the second coil 512 are both located within the projection of the first insulating member 6, so that the first insulating member 6 prevents the first coil 511 and the second coil 512 from contacting the first body 11, thereby reducing the risk of the first body 11 short-circuiting the first coil 511 and the second coil 512. As viewed in the first direction X, there is a gap between the first coil 511 and the first leg 3, and there is a gap between the second coil 512 and the second leg 4, thereby reducing the risk of the first magnetic core 1 short-circuiting the first coil 511 and the second coil 512, and reducing the risk of the inductor 10 failing to operate normally.

[0041] In some embodiments, as shown in FIG. 1, the first insulating member 6 can be an insulating film, which is attached to the first surface 51 of the coil circuit board 5 and covers the surfaces of the first coil 511 and the second coil 512, thereby reducing the risk of the first magnetic core 1 short-circuiting the first coil 511 and the second coil 512.

[0042] In some embodiments, as shown in FIG. 1, Figure 3 The inductor 10 further comprises a second insulating member 7 arranged between the coil circuit board 5 and the second magnetic core 2, which is used to insulate the coil circuit board 5 from the second magnetic core 2, thereby reducing the risk of the second magnetic core 2 short-circuiting the internal circuit (not shown in the figure) of the coil circuit board 5 and ensuring that the inductor 10 operates normally.

[0043] In some embodiments, the second insulating member 7 is in the form of a plate, and in the first direction X, the projection of the internal circuit in the coil circuit board 5 is located within the projection of the second insulating member 7, thereby reducing the risk of the coil circuit board 5 short-circuiting.

[0044] In some embodiments, as shown in FIG. 1, the second insulating member 7 can also be an insulating film, which is attached to the second surface 54 of the coil circuit board 5 to insulate the coil circuit board 5 from the second magnetic core 2.

[0045] In some embodiments, as shown in FIG. 1, Figure 2 and Figure 3The first protrusions 12, the second protrusions 13, the third protrusions 22, and the fourth protrusions 23 are all multiple in number. The multiple first protrusions 12 are spaced apart along the second direction Y on the surface of the first body 11 facing the second body 21. The multiple second protrusions 13 are spaced apart along the second direction Y on the surface of the first body 11 facing the second body 21. The first protrusions 12 and the second protrusions 13 are spaced apart along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The multiple third protrusions 22 are spaced apart along the second direction Y on the surface of the second body 21 facing the first body 11. The multiple fourth protrusions 23 are spaced apart along the second direction Y on the surface of the second body 21 facing the first body 11. An end of a first protrusion 12 facing away from the first body 11 is bonded and fixed to an end of a third protrusion 22 facing away from the second body 21, so that the first protrusion 12 and the third protrusion 22 together form a first center pillar 3. An end of a second protrusion 13 facing away from the first body 11 is bonded and fixed to an end of a fourth protrusion 23 facing away from the second body 21, so that the second protrusion 13 and the fourth protrusion 23 together form a second center pillar 4. The coil circuit board 5 is provided with a plurality of first through holes 52 and a plurality of second through holes 53. A first center pillar 3 is passed through a first through hole 52, and a second center pillar 4 is passed through a second through hole 53. A plurality of first coils 511 and a plurality of second coils 512 are provided on the first surface 51 of the coil circuit board 5. When viewed along the first direction X, a first coil 511 surrounds a first center pillar 3, and a second coil 512 surrounds a second center pillar 4. The first coils 511 are connected in series, and the second coils 512 are connected in series.

[0046] In this embodiment, by providing multiple first coils 511 and multiple second coils 512, the multiple first coils 511 are connected in series, the multiple second coils 512 are connected in series, and a first coil 511 surrounds a first center column 3, and a second coil 512 surrounds a second center column 4, thereby increasing the inductance of the inductor 10; in addition, since the multiple first center columns 3 are spaced apart along the second direction Y, and the multiple second center columns 4 are also spaced apart along the second direction Y, compared to the method of winding all coils on the same center column, this embodiment can reduce the thickness of the inductor 10 in the first direction X, so that the inductor 10 of the present application can be used in thin electronic devices, which is conducive to the thin design of electronic devices.

[0047] Furthermore, if multiple first coils 511 are wound around the same first center column 3, or multiple second coils 512 are wound around the same second center column 4, then the distance between the winding front end and the winding rear end of the same coil is relatively close, which easily forms parasitic capacitance, and the parasitic capacitance has an adverse effect on the operation of the inductor 10. Therefore, in the present application, by distributing multiple first center columns 3 and multiple second center columns 4 at intervals along the second direction Y, the distance between the winding front end and the winding rear end of the coil can be increased, the generation of parasitic capacitance can be reduced, and the stability of the inductor 10 during operation can be improved. It is worth noting that for the same type of coils connected in series, the so-called winding front end is one end of the signal input coil, and the winding rear end is one end of the signal output coil.

[0048] In some embodiments, see Figures 1 to 3 There are multiple coil circuit boards 5, and the multiple coil circuit boards 5 are stacked along the first direction X, and the multiple coil circuit boards 5 are all located between the first body 11 and the second body 21. The above-mentioned first center pillars 3 and second center pillars 4 are all passed through the multiple coil circuit boards 5, so that a first coil 511 on each coil circuit board 5 is wound around a first center pillar 3, and a second coil 512 on each coil circuit board 5 is wound around a second center pillar 4, and the coil circuit boards 5 are electrically connected, so that the inductance of the inductor 10 can be increased, so that the inductor 10 in this application can be used in electronic devices with higher power.

[0049] In some embodiments, the inductor 10 further includes a plurality of third insulating members 8 , with a third insulating member 8 disposed between each two adjacent coil circuit boards 5 to insulate the coil circuit boards 5 from each other and reduce signal interference between the coil circuit boards 5 .

[0050] It is worth noting that the coil circuit boards 5 can be electrically connected via wires. Alternatively, a notch (not shown) can be provided on the third insulating member 8, and a corresponding connecting portion (not shown) can be provided between two adjacent coil circuit boards 5. The adjacent coil circuit boards 5 are electrically connected via the connecting portion at the notch position. At other positions, the third insulating member 8 insulates the adjacent coil circuit boards 5, thereby reducing interference between the two adjacent coil circuit boards 5 when the two adjacent coil circuit boards 5 are electrically connected.

[0051] In an embodiment of the present utility model, the first magnetic core 1 includes a first body 11, a first protrusion 12 and a second protrusion 13, and the first protrusion 12 and the second protrusion 13 are spaced apart on the first body 11. The second magnetic core 2 includes a second body 21, a third protrusion 22 and a fourth protrusion 23, and the third protrusion 22 and the fourth protrusion 23 are spaced apart on the second body 21. By arranging the first coil 511 and the second coil 512 on the coil circuit board 5, when assembling the inductor 10, it is only necessary to install the coil circuit board 5 to the first magnetic core 1, and make the first coil 511 surround the first protrusion 12, and the second coil 512 surround the second protrusion 13. Then, the third protrusion 22 of the second magnetic core 2 is bonded and fixed to the first protrusion 12, and the fourth protrusion 23 is bonded and fixed to the second protrusion 13. No winding operation is required, which is beneficial to reducing the assembly difficulty of the inductor 10 and improving the assembly efficiency.

[0052] Another embodiment of the present invention provides a circuit board assembly 100. Figure 5 or Figure 6 The circuit board assembly 100 includes the aforementioned inductor 10 and a main circuit board 20 .

[0053] like Figure 6 As shown, the main circuit board 20 is provided with a receiving slot 201 for at least partially accommodating the inductor 10. The outermost coil circuit board 5 of the inductor 10 is provided with multiple soldering portions (not shown) for soldering and securing to the main circuit board 20 to achieve electrical connection between the inductor 10 and the main circuit board 20. The inductor 10 is used to process signals in the main circuit board 20 to reduce signal noise in the main circuit board 20.

[0054] In this embodiment, by providing a receiving groove 201 on the main circuit board 20, at least a portion of the inductor 10 is received within the receiving groove 201. This reduces the thickness of the circuit board assembly 100, facilitating a slim design for the electronic device. The specific structure and function of the inductor 10 can be found in the above embodiments and will not be detailed here.

[0055] Another embodiment of the present invention further provides an electronic device, which includes the above-mentioned circuit board assembly 100. The specific structure and function of the circuit board assembly 100 can be found in the above-mentioned embodiment, and will not be described in detail here.

[0056] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An inductor, characterized in that: Includes a first magnetic core, a second magnetic core and a coil circuit board: The first magnetic core includes a first body, a first protrusion and a second protrusion, wherein the first protrusion and the second protrusion are spaced apart from each other and arranged on the first body; The second magnetic core includes a second body, a third protrusion, and a fourth protrusion, wherein the third protrusion and the fourth protrusion are spaced apart from each other on the second body; an end of the first protrusion away from the first body is bonded and fixed to an end of the third protrusion away from the second body, and an end of the second protrusion away from the first body is bonded and fixed to an end of the fourth protrusion away from the second body, wherein the first protrusion and the third protrusion constitute a first center column, and the second protrusion and the fourth protrusion constitute a second center column; The coil circuit board is located between the first body and the second body, and the first surface of the coil circuit board is provided with a first coil and a second coil. The first center column and the second center column are both arranged in the coil circuit board along the first direction. When viewed along the first direction, the first coil surrounds the first center column and the second coil surrounds the second center column, wherein the first surface faces the first body and the first direction is perpendicular to the first surface.

2. The inductor according to claim 1, wherein: The inductor further includes a first insulating member; the first insulating member is disposed between the coil circuit board and the first magnetic core to insulate the coil circuit board from the first magnetic core.

3. The inductor according to claim 2, characterized in that The first insulating member is an insulating plate, which is arranged between the coil circuit board and the first body, and along the first direction, the projection of the first coil and the projection of the second coil are both located within the projection of the first insulating member. When viewed along the first direction, there is a gap between the first coil and the first center column, and there is a gap between the second coil and the second center column.

4. The inductor according to claim 2, wherein: The first insulating member is an insulating film, and the insulating film covers a surface of the first coil and a surface of the second coil.

5. The inductor according to claim 1, wherein: The inductor further includes a second insulating member disposed between the coil circuit board and the second magnetic core to insulate the coil circuit board from the second magnetic core.

6. The inductor according to any one of claims 1 to 5, characterized in that: The number of the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion are all multiple, one first protrusion and one third protrusion are bonded and fixed to form a first center column, and one second protrusion and one fourth protrusion are bonded and fixed to form a second center column; Multiple first center pillars and multiple second center pillars are all arranged on the coil circuit board along the first direction. Multiple first coils and multiple second coils are provided on the first surface of the coil circuit board. When viewed along the first direction, one first coil surrounds one first center pillar, one second coil surrounds one second center pillar, and multiple first coils are connected in series, and multiple second coils are connected in series.

7. The inductor according to any one of claims 1 to 5, characterized in that: There are multiple coil circuit boards, which are stacked along the first direction and are located between the first body and the second body.

8. The inductor according to claim 7, characterized in that A third insulating member is further provided between each two adjacent coil circuit boards to insulate the coil circuit boards from each other.

9. A circuit board assembly, characterized in that: It comprises a main circuit board and the inductor according to any one of claims 1 to 8; the coil circuit board is arranged on the main circuit board, and the coil circuit board is electrically connected to the main circuit board.

10. An electronic device, characterized in that: The invention comprises the circuit board assembly described in claim 9.

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