Magnetic component

Abstract

The utility model relates to a magnetic component which is characterized in that a component shell is made of an insulating material, an assembly cavity is formed in the component shell, an assembly window communicated with the assembly cavity is formed in the component shell, a prefabricated coil is assembled in the assembly cavity of the component shell, and the prefabricated coil comprises a hollow coil and an insulating coating body; the insulating wrapping body wraps the hollow coil, the two tail ends of the hollow coil are exposed out of the insulating wrapping body, the two tail ends of the hollow coil extend out of the device shell and are used for being connected with an external circuit, the magnetic filling material is filled in an assembling cavity of the device shell, and the magnetic filling material is arranged in the assembling cavity of the device shell. And the magnetic filling material fills all other spaces except the space occupied by the prefabricated coil in the assembly cavity. The magnetic filling material has the filling characteristic, by means of the filling characteristic of the magnetic filling material, the whole space in the assembling cavity of the device shell is filled in the assembling process of the magnetic component, and the technical problem that the space utilization rate in the assembling cavity of the device shell is low is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic components, and in particular to the technical field of inductors which are magnetic components. Background Art

[0002] With the continuous development of science and technology, inductors have evolved from the earliest inductors formed by a single coil, to inductors formed by a coil combination magnetic core, to inductors formed by hollow coils molded with various magnetic materials. The types of inductors have been constantly updated and their performance has been continuously improved. For example, although the inductor formed by a coil combination magnetic core solves the problem of inductance, it has shortcomings in efficiency and miniaturization due to its compact structure. As for inductors using hollow coils molded with magnetic materials, although the shortcomings in efficiency and miniaturization have been solved, the production process and equipment investment are relatively high. Today, with the intensive and efficient application of electronic components, such as the application of automotive inductors, higher requirements are put forward for technicians in this field. At this time, the inductor needs to meet the requirements of large current, higher insulation and stability, and also needs to meet the industry needs of miniaturization and high efficiency. The structure must be compact and the process must be simple. Summary of the invention

[0003] Based on this, it is necessary to provide a magnetic component to address at least one of the technical problems mentioned above.

[0004] The present application provides a magnetic component, the magnetic component comprising:

[0005] A device housing, wherein the device housing is made of an insulating material, has an assembly cavity inside, and has an assembly window communicating with the assembly cavity;

[0006] A prefabricated coil, the prefabricated coil is assembled in the assembly cavity of the device housing, wherein the prefabricated coil comprises a hollow coil and an insulating sheath, the insulating sheath is sheathed on the outside of the hollow coil, two end portions of the hollow coil are exposed on the outside of the insulating sheath, and the two end portions of the hollow coil extend to the outside of the device housing for connecting to an external circuit;

[0007] A magnetic filling material is filled in the assembly cavity of the device housing, wherein the magnetic filling material fills all other spaces in the assembly cavity except for the space occupied by the prefabricated coil.

[0008] In one embodiment, the magnetic filling material is a resin material containing magnetic powder.

[0009] In one embodiment, the magnetic filling material includes a first magnet and a resin material containing magnetic powder, the first magnet includes a first magnetic seat and a first magnetic column, the first magnetic column stands upright on the first magnetic seat, the prefabricated coil is sleeved and assembled on the first magnetic column, and the resin material fills all other space in the assembly cavity except for the space occupied by the prefabricated coil and the first magnet.

[0010] In one embodiment, the magnetic filling material includes a second magnet, a third magnet and a resin material containing magnetic powder, the second magnet includes a second magnetic seat and a second magnetic column, the second magnetic column is erected on the second magnetic seat, the prefabricated coil is sleeved and assembled on the second magnetic column, the second magnetic seat is located on one side of the prefabricated coil, the third magnet is a magnetic plate, and the third magnet is arranged on the other side of the prefabricated coil, and the resin material fills all other space in the assembly cavity except for the space occupied by the prefabricated coil, the second magnet and the third magnet.

[0011] In one embodiment, the magnetic filling material includes a fourth magnet and a resin material containing magnetic powder, the fourth magnet has a magnetic inner cavity, the fourth magnet is arranged in the assembly cavity of the device housing, the prefabricated coil is arranged in the magnetic inner cavity of the fourth magnet, and the resin material fills all other space in the assembly cavity except that occupied by the prefabricated coil and the fourth magnet.

[0012] In one embodiment, the device shell includes a shell bottom and a shell side wall, the shell side wall is vertically connected to the edge of the shell bottom, thereby forming the assembly window at the top of the shell side wall, and the shell side wall is provided with an assembly notch, and the two end portions of the hollow coil extend outward through the assembly notch of the device shell.

[0013] In one embodiment, the insulating sheath includes a sheath body and an assembly clip, the sheath body is connected to the assembly clip, the two end portions of the hollow coil are exposed to the outside of the insulating sheath via the assembly clip, the shape of the assembly clip and the shape of the assembly notch match each other, and the assembly clip is used to be engaged and assembled with the assembly notch.

[0014] In one embodiment, the magnetic component comprises:

[0015] The number of the electrodes is two, and the two electrodes are respectively connected to the two end portions of the air-core coil.

[0016] In one embodiment, the assembly clamp is provided with a protruding nail, and the protruding nail is engaged with the electrode; and / or,

[0017] The electrode has a terminal socket, and the terminal end of the air-core coil is plug-fitted and assembled with the terminal socket of the electrode.

[0018] In one of the embodiments, the assembly window of the device housing is covered with an insulating heat-conducting sheet.

[0019] In the above-mentioned magnetic components, when at least a part of the structure of the magnetic filling material is in a deformable flexible state, the magnetic filling material can have a filling property. With the help of its filling property, the entire space in the assembly cavity of the device shell is filled during the assembly process of the magnetic component. For example, after the prefabricated coil is assembled in the assembly cavity of the device shell, the magnetic filling material can then fill all other space in the assembly cavity except that occupied by the prefabricated coil, thereby filling all the space in the assembly cavity of the device shell. Therefore, the technical problem of low space utilization in the assembly cavity of the device shell can be effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 is an exploded view of a magnetic component provided in one embodiment of the present application.

[0021] FIG. 2 is an exploded view of a magnetic component provided in another embodiment of the present application.

[0022] FIG. 3 is an exploded view of a magnetic component provided in yet another embodiment of the present application.

[0023] Figure Number:

[0024] 1000, device housing; 2000, prefabricated coil; 3000, magnetic filling material; 4000, electrode; 5000, insulating thermal conductive sheet;

[0025] 1000a, assembly cavity; 1000b, assembly window; 1000c, assembly notch;

[0026] 2100a, terminal portion; 2200, insulating covering body; 2200a, covering body; 2200b, assembly clamp portion;

[0027] 3100, first magnet; 3100a, first magnetic seat; 3100b, first magnetic column;

[0028] 3200, second magnet; 3200a, second magnetic seat; 3200b, second magnetic column;

[0029] 3300, a third magnet;

[0030] 3400, fourth magnet; 3400a, magnetic inner cavity;

[0031] 4000a, end socket. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0038] Referring to FIG. 1 , the present application provides a magnetic component, which includes a device housing 1000, a prefabricated coil 2000 and a magnetic filling material 3000. The material of the device housing 1000 is an insulating material, which provides an insulating function. Therefore, the device housing 1000 can be made of various insulating materials such as plastics and rubbers with insulating effects, which are not limited here. The device housing 1000 has an assembly cavity 1000a inside, and the device housing 1000 is provided with an assembly window 1000b connected to the assembly cavity 1000a. The device housing 1000 can be set to a variety of shapes. For example, the device housing 1000 adopts regular shapes such as a cube, a cylinder or other irregular shapes, which are not limited here. Those skilled in the art can construct the device housing 1000 according to actual needs.

[0039] Based on the device housing 1000 provided above, the prefabricated coil 2000 can be assembled in the assembly cavity 1000a of the device housing 1000. The prefabricated coil 2000 may include a hollow coil and an insulating sheath 2200, and the insulating sheath 2200 may be sheathed on the outside of the hollow coil, for example, after the insulating copper wire is wound into a predetermined shape, the insulating sheath 2200 is sheathed on the outside of the hollow coil by plastic molding, and simultaneously molded into a desired shape. The hollow coil has two terminal portions 2100a, i.e., the two ends of the hollow coil. Therefore, after the insulating coating 2200 covers the hollow coil, the two terminal portions 2100a of the hollow coil need to be exposed outside the insulating coating 2200, and after the prefabricated coil 2000 is assembled in the assembly cavity 1000a of the device housing 1000, the two terminal portions 2100a of the hollow coil also need to extend to the outside of the device housing 1000, and the two extended terminal portions 2100a can be used to connect to an external circuit. In addition, the magnetic component may also include an electrode 4000, the number of which is set to two, and the two electrodes 4000 are respectively connected to the two terminal portions 2100a of the hollow coil. It can be understood by those skilled in the art that the terminal portion 2100a can be directly connected to an external circuit as an electrode, or it can be connected to an external circuit after being connected to the above-mentioned electrode 4000.

[0040] As shown in FIG. 1 , the design point of the present application is that a magnetic filling material 3000 is used in the assembly process of magnetic components, and the magnetic filling material 3000 has a magnetic effect. It should be noted that at least a portion of the structure of the magnetic filling material 3000 has a deformable function. For example, under different environmental conditions, at least a portion of the structure of the magnetic filling material 3000 can be in a deformable flexible state (or a plastic state that can be shaped into different shapes), and can be in an undeformable solid state. For example, in one embodiment, under different temperature conditions, at least a portion of the structure of the magnetic filling material 3000 can be in a deformable flexible state (or a plastic state that can be shaped into different shapes), and can be in an undeformable solid state. Those skilled in the art can select appropriate materials according to actual needs, and as a common means of adjusting the inductance performance, the composition ratio or magnetic permeability of the flexible state and solid state filling materials can be combined in different ways according to actual needs, and as a solid state filling material, it can be pre-fabricated according to the shape between the shell 1000 and the prefabricated coil 2000, and can be formed by any production method in the prior art, which is not limited here.

[0041] Therefore, when at least a part of the structure of the magnetic filling material 3000 is in a deformable flexible state, the magnetic filling material 3000 can have a filling characteristic, which is different from the assembly characteristic. Among them, the assembly characteristic is to shape the shapes of different components so that different components can be assembled with each other, but due to the problem of assembly accuracy, it is difficult to achieve a high accuracy in the assembly of different components, so gaps are easily generated, which affects the space utilization rate of the assembly cavity 1000a of the device housing 1000. However, the present application provides a magnetic filling material 3000 with magnetic function, which can fill the entire space in the assembly cavity 1000a of the device shell 1000 during the assembly process of the magnetic component by virtue of its filling characteristics. For example, after the prefabricated coil 2000 is assembled in the assembly cavity 1000a of the device shell 1000, the magnetic filling material 3000 can then fill all other spaces in the assembly cavity 1000a except for the space occupied by the prefabricated coil 2000, thereby making the entire space in the assembly cavity 1000a of the device shell 1000 completely filled, thereby effectively solving the technical problem of low space utilization in the assembly cavity 1000a of the device shell 1000, and at the same time improving the overall assembly strength, so that the magnetic component has high insulation reliability, good saturation current performance, and low resistance, and the dimensional tolerance of the device shell 1000 and the prefabricated coil 2000 forms a complete one-piece device structure. The magnetic filling material 3000 may all have a deformable function. For example, in one embodiment, the magnetic filling material 3000 may be a resin material containing magnetic powder inside, wherein the resin material has the characteristic of being in different states under different temperature conditions. For example, when the temperature is high, the resin material may present a certain degree of fluidity. Therefore, the resin material may be placed in a deformable state by heating, and then placed in a solid state after cooling to achieve shape shaping. Therefore, after the prefabricated coil 2000 is assembled in the assembly cavity 1000a of the device housing 1000, the resin material may then fill all other spaces in the assembly cavity 1000a except for those occupied by the prefabricated coil 2000, thereby filling all spaces in the assembly cavity 1000a of the device housing 1000. After cooling, the resin material will solidify into a solid state. Moreover, the magnetic powder is mixed in the resin material, which allows the resin material and the magnetic powder to together constitute the magnetic filling material 3000. After the resin material solidifies into a solid state, the magnetic filling material 3000 is constructed into a solid magnet, which has the magnetic function of a conventional solid magnet and can also fully fill the entire space of the assembly cavity 1000a of the device housing 1000.

[0042] The magnetic filling material 3000 may also partially have a deformable function and partially not have a deformable function. For example, referring to FIG. 1 , in one embodiment, the magnetic filling material 3000 includes a first magnet 3100 and a resin material containing magnetic powder therein, wherein the first magnet 3100 does not have a deformable function, and the resin material has the property of being in different states under different temperature conditions. For example, when the temperature is high, the resin material may exhibit a certain degree of fluidity. Therefore, the resin material can be placed in a deformable state by heating, and then placed in a solid state after cooling, thereby achieving shape shaping.

[0043] As shown in FIG1 , the first magnet 3100 includes a first magnetic seat 3100a and a first magnetic column 3100b, and the first magnetic column 3100b stands on the first magnetic seat 3100a. Therefore, the prefabricated coil 2000 can be sleeved and assembled on the first magnetic column 3100b. At this time, even if there is a gap between the prefabricated coil 2000 and the first magnetic column 3100b and the first magnetic seat 3100a, after the prefabricated coil 2000 is assembled in the assembly cavity 1000a of the device housing 1000, the resin material can subsequently fill all other spaces in the assembly cavity 1000a except for the prefabricated coil 2000 and the first magnet 3100, thereby making the entire space in the assembly cavity 1000a of the device housing 1000 completely filled. After cooling down, the resin material will solidify into a solid state.

[0044] Moreover, the magnetic powder is mixed in the resin material, which allows the resin material and the magnetic powder to together constitute the magnetic filling material 3000. After the resin material solidifies into a solid state, the magnetic filling material 3000 is constructed into a solid magnet, which has the magnetic function of a conventional solid magnet and can also fully fill the entire space of the assembly cavity 1000a of the device housing 1000.

[0045] Similarly, referring to FIG. 2 , in one embodiment, the magnetic filling material 3000 includes a second magnet 3200, a third magnet 3300 and a resin material containing magnetic powder. The second magnetic seat 3200a and the second magnetic column 3200b of the second magnet 3200 can refer to the first magnetic seat 3100a and the first magnetic column 3100b of the first magnet 3100. The second magnet 3200 also does not have a deformable function, while the resin material has the characteristic of being in different states under different temperature conditions. For example, when the temperature is high, the resin material can present a certain degree of fluidity. Therefore, the resin material can be placed in a deformable state by heating, and then placed in a solid state after cooling to achieve shape shaping.

[0046] As shown in Figure 2, the second magnetic column 3200b is erected on the second magnetic seat 3200a, the prefabricated coil 2000 is sleeved and assembled on the second magnetic column 3200b, the second magnetic seat 3200a is located on one side of the prefabricated coil 2000, the third magnet 3300 is a magnetic plate, and the third magnet 3300 is arranged on the other side of the prefabricated coil 2000. At this time, even if there is a gap between the prefabricated coil 2000 and the first magnetic column 3100b, the first magnetic seat 3100a and the third magnet 3300, after the prefabricated coil 2000 is assembled in the assembly cavity 1000a of the device housing 1000, the resin material can then fill all other spaces in the assembly cavity 1000a except for the spaces occupied by the prefabricated coil 2000, the second magnet 3200 and the third magnet 3300, thereby filling all the spaces in the assembly cavity 1000a of the device housing 1000. After cooling down, the resin material will solidify into a solid state.

[0047] Moreover, the magnetic powder is mixed in the resin material, which allows the resin material and the magnetic powder to together constitute the magnetic filling material 3000. After the resin material solidifies into a solid state, the magnetic filling material 3000 is constructed into a solid magnet, which has the magnetic function of a conventional solid magnet and can also fully fill the entire space of the assembly cavity 1000a of the device housing 1000.

[0048] In one embodiment, as shown in FIG. 3 , the magnetic filling material 3000 includes a fourth magnet 3400 and a resin material containing magnetic powder therein, wherein the fourth magnet 3400 does not have a deformable function, and the resin material has the property of being in different states under different temperature conditions. For example, when the temperature is high, the resin material may exhibit a certain degree of fluidity. Therefore, the resin material can be placed in a deformable state by heating, and then placed in a solid state after cooling, thereby achieving shape shaping.

[0049] As shown in FIG3 , the fourth magnet 3400 has a magnetic inner cavity 3400a inside, the fourth magnet 3400 is arranged in the assembly cavity 1000a of the device housing 1000, and the prefabricated coil 2000 is arranged in the magnetic inner cavity 3400a of the fourth magnet 3400. At this time, even if there is a gap between the prefabricated coil 2000 and the fourth magnet 3400, after the prefabricated coil 2000 is assembled in the assembly cavity 1000a of the device housing 1000, the resin material can subsequently fill all other spaces in the assembly cavity 1000a except for the prefabricated coil 2000 and the fourth magnet 3400, thereby making the entire space in the assembly cavity 1000a of the device housing 1000 completely filled. After cooling down, the resin material will solidify into a solid state.

[0050] Moreover, the magnetic powder is mixed in the resin material, which allows the resin material and the magnetic powder to together constitute the magnetic filling material 3000. After the resin material solidifies into a solid state, the magnetic filling material 3000 is constructed into a solid magnet, which has the magnetic function of a conventional solid magnet and can also fully fill the entire space of the assembly cavity 1000a of the device housing 1000.

[0051] In one embodiment, the device housing 1000 may include a housing bottom and a housing side wall, wherein the housing side wall is vertically connected to the edge of the housing bottom. For example, as shown in FIG. 1 , the device housing 1000 is constructed as a square frame through the housing bottom and the housing side wall, thereby forming the assembly window 1000b at the top of the housing side wall, and the housing side wall is provided with an assembly notch 1000c, and the two end portions 2100a of the hollow coil extend outward through the assembly notch 1000c of the device housing 1000. At this time, the insulating coating 2200 may include a coating body 2200a and an assembly clamp portion 2200b, the coating body 2200a is connected to the assembly clamp portion 2200b, the two end portions 2100a of the hollow coil are exposed to the outside of the insulating coating 2200 through the assembly clamp portion 2200b, the shape of the assembly clamp portion 2200b matches the shape of the assembly notch 1000c, and the assembly clamp portion 2200b is used to be clamped and assembled with the assembly notch 1000c.

[0052] In one embodiment, the assembly clamping portion 2200b is provided with a protruding nail, and the protruding nail is engaged with the electrode 4000. The electrode 4000 has an end socket 4000a, and the end portion 2100a of the hollow coil is plugged and assembled with the end socket 4000a of the electrode 4000. Moreover, in one embodiment, the assembly window 1000b of the device housing 1000 can also be covered with an insulating heat conductive sheet 5000.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A magnetic component, characterized in that: The magnetic components include: A device housing, wherein the device housing is made of an insulating material, has an assembly cavity inside, and has an assembly window communicating with the assembly cavity; A prefabricated coil, the prefabricated coil is assembled in the assembly cavity of the device housing, wherein the prefabricated coil comprises a hollow coil and an insulating sheath, the insulating sheath is sheathed on the outside of the hollow coil, two end portions of the hollow coil are exposed on the outside of the insulating sheath, and the two end portions of the hollow coil extend to the outside of the device housing for connecting to an external circuit; A magnetic filling material is filled in the assembly cavity of the device housing, wherein the magnetic filling material fills all other spaces in the assembly cavity except for the space occupied by the prefabricated coil.

2. The magnetic component according to claim 1, characterized in that: The magnetic filling material is a resin material containing magnetic powder inside.

3. The magnetic component according to claim 1, characterized in that: The magnetic filling material includes a first magnet and a resin material containing magnetic powder. The first magnet includes a first magnetic seat and a first magnetic column. The first magnetic column stands upright on the first magnetic seat. The prefabricated coil is sleeved and assembled on the first magnetic column. The resin material fills all other space in the assembly cavity except for the space occupied by the prefabricated coil and the first magnet.

4. The magnetic component according to claim 1, characterized in that: The magnetic filling material includes a second magnet, a third magnet and a resin material containing magnetic powder. The second magnet includes a second magnetic seat and a second magnetic column. The second magnetic column stands upright on the second magnetic seat. The prefabricated coil is sleeved and assembled on the second magnetic column. The second magnetic seat is located on one side of the prefabricated coil. The third magnet is a magnetic plate. The third magnet is arranged on the other side of the prefabricated coil. The resin material fills all other space in the assembly cavity except for the space occupied by the prefabricated coil, the second magnet and the third magnet.

5. The magnetic component according to claim 1, characterized in that: The magnetic filling material includes a fourth magnet and a resin material containing magnetic powder. The fourth magnet has a magnetic inner cavity. The fourth magnet is arranged in the assembly cavity of the device housing. The prefabricated coil is arranged in the magnetic inner cavity of the fourth magnet. The resin material fills all other space in the assembly cavity except for the space occupied by the prefabricated coil and the fourth magnet.

6. The magnetic component according to any one of claims 1 to 5, characterized in that: The device shell includes a shell bottom and a shell side wall, the shell side wall is vertically connected to the edge of the shell bottom, thereby forming the assembly window at the top of the shell side wall, and the shell side wall is provided with an assembly notch, and the two end portions of the hollow coil extend outward through the assembly notch of the device shell.

7. The magnetic component according to claim 6, characterized in that: The insulating sheath includes a sheath body and an assembly clamp portion, the sheath body is connected to the assembly clamp portion, the two end portions of the hollow coil are exposed to the outside of the insulating sheath via the assembly clamp portion, the shape of the assembly clamp portion matches the shape of the assembly notch, and the assembly clamp portion is used for clamping and assembling with the assembly notch.

8. The magnetic component according to claim 7, characterized in that: The magnetic components include: The number of the electrodes is two, and the two electrodes are respectively connected to the two end portions of the air-core coil.

9. The magnetic component according to claim 8, characterized in that: The assembly clamp is provided with a protruding nail, and the protruding nail is engaged with the electrode; and / or, The electrode has a terminal socket, and the terminal end of the air-core coil is plug-fitted and assembled with the terminal socket of the electrode.

10. The magnetic component according to claim 1, characterized in that: The assembly window of the device housing is covered with an insulating heat-conducting sheet.

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