Magnet, electronic equipment and charging equipment

Abstract

The invention provides a magnet, an electronic device and a charging device, the magnet comprises a first sub-magnet and a second sub-magnet, the direction of magnetic lines in the first sub-magnet and the direction of magnetic lines in the second sub-magnet are inclined to the plane where the magnet is located, and more magnetic lines can be gathered in the space on one side of the magnet and are sparse around the magnet. According to the invention, by changing the distribution of the magnetic lines of force of the magnet, the magnet with a small size can generate a strong suction force or a repulsive force, the use amount of materials for manufacturing the magnet is small, and the adverse effect of the magnet on surrounding electronic components is small. The magnet can be assembled in electronic equipment with a limited accommodating space, and the magnet is wide in application scene and beneficial to saving rare earth elements and other resources for manufacturing the magnet.

Description

Technical Field

[0001] The present application relates to the field of terminal device hardware, and in particular, to a magnet, an electronic device and a charging device. Background Art

[0002] With the development and progress of computer hardware and software technology, more and more functions are integrated into electronic devices such as mobile phones and tablets. Hundreds of electronic components need to be accommodated in electronic devices with limited storage space, and the space that each electronic component can occupy is getting smaller and smaller. Multiple closely arranged electronic components will also affect each other due to electromagnetic induction, which is not conducive to the normal operation of electronic devices.

[0003] Magnets are necessary components for realizing functions such as magnetic charging of electronic devices. How to control the volume of the magnet and reduce the space occupied by the magnet while providing a magnetic attraction force of sufficient strength is a problem worth considering. Summary of the invention

[0004] The present application provides a magnet in which the direction of the magnetic force lines inside the magnet is inclined to the plane where the magnet is located. The magnetic force lines on one side of the magnet used to generate interaction force with other magnets are relatively dense. A magnet with a smaller volume can provide a magnetic attraction force of considerable strength, while having little impact on magnetically sensitive components on the back and sides of the magnet.

[0005] In a first aspect, a magnet is provided, comprising: a plurality of magnet units, the plurality of magnet units are arranged in a ring shape, the magnet units comprising a first magnet sub-unit and a second magnet sub-unit, the first magnet sub-unit and the second magnet sub-unit are relatively fixed, a first magnetic pole of the first magnet sub-unit is adjacent to a second magnetic pole of the second magnet sub-unit, the first magnetic pole is opposite to the second magnetic pole, and the first magnetic pole and the second magnetic pole are both arranged close to the same surface of the magnet; wherein the direction of the magnetic force lines inside the first magnet sub-unit is inclined to the plane where the magnet is located, and the direction of the magnetic force lines inside the second magnet sub-unit is inclined to the plane where the magnet is located.

[0006] In some scenarios, the direction of the magnetic force lines inside the first magnet subunit can also be understood as the magnetization direction inside the first magnet subunit, and the direction of the magnetic force lines inside the second magnet subunit can also be understood as the magnetization direction inside the second magnet subunit.

[0007] It should be noted that the fact that the direction of the magnetic force lines is inclined to the plane where the magnet is located should be understood as: the direction of the magnetic force lines is neither perpendicular to the plane where the magnet is located nor parallel to the plane where the magnet is located.

[0008] In some scenarios, the inclination of the direction of the magnetic lines of force with respect to the plane where the magnet is located can also be understood as the inclination of the direction of the magnetic lines of force with respect to the normal direction of the plane where the magnet is located.

[0009] By tilting the directions of the magnetic force lines inside the first magnet subunit and the second magnet subunit, and setting the magnetic poles of the first magnet subunit and the second magnet subunit on the side close to each other oppositely, more magnetic force lines can be gathered on the working surface of the magnet. In the case of using the working surface of the magnet to attract or repel other magnets, the magnet provided in the present technical solution can generate a stronger interaction force with other magnets compared to a magnet with non-tilted magnetic force lines. From another perspective, when the interaction forces generated are equal, the magnet provided in the present technical solution is smaller in size and occupies less space when placed in an electronic device.

[0010] In addition, the technical solution of the present invention forms a ring-shaped magnet by forming a plurality of magnet units. In different application scenarios, the plurality of magnet units may have different assembly methods. The technical solution is conducive to improving the scenario applicability of the magnet provided in the present application.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the angle between the direction of the magnetic force lines inside the first magnet sub-unit and the plane where the magnet is located is α, and the angle between the direction of the magnetic force lines inside the second magnet sub-unit and the plane where the magnet is located is β, wherein 30≤α<90°, 30≤β<90°.

[0012] The first magnet sub-unit and the second magnet sub-unit within the tilt angle range provided in the technical solution can generate a stronger magnetic field intensity on one side of the working surface, and the distribution of magnetic lines of force is denser.

[0013] In combination with the first aspect, in some implementations of the first aspect, α=β.

[0014] By setting the inclination angle of the magnetic force lines in the first magnet sub-unit to be the same as the inclination angle of the magnetic force lines in the second magnet sub-unit, after the magnetic field generated by the first magnet sub-unit and the magnetic field generated by the second magnet sub-unit are superimposed, the magnetic force lines around the magnet are sparser, and when the magnet is installed in an electronic device, the magnet has less adverse effects on surrounding electronic components.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the first magnet sub-unit includes a first contact surface and a first exposed surface that are relatively arranged, and the second magnet sub-unit includes a second contact surface and a second exposed surface that are relatively arranged, the first contact surface and the second contact surface are arranged adjacent to each other, the first exposed surface is far away from the second contact surface, and the second exposed surface is arranged far away from the first contact surface, wherein the distance between the first contact surface and the first exposed surface is equal to the distance between the second contact surface and the second exposed surface.

[0016] In the technical solution, by further limiting the relationship between the shapes of the first magnet sub-unit and the second magnet sub-unit, the distribution density of the magnetic lines of force around the magnet is further reduced, and the adverse effects of the magnet on surrounding electronic components are further reduced.

[0017] In combination with the first aspect, in some implementations of the first aspect, the magnet unit is a non-mirror-symmetric structure.

[0018] In a possible implementation, the magnet unit includes a connecting wall, two connecting walls of two adjacent magnet units among the multiple magnet units are adjacent, the connecting wall includes a first connecting wall and a second connecting wall that are oppositely arranged, and the first connecting wall is not mirror-symmetrical with the second connecting wall.

[0019] In a possible implementation, the magnet unit includes a working surface and a connecting surface that are arranged opposite to each other, and the working surface and the connecting surface are not mirror-symmetrical.

[0020] In a possible implementation, the magnet unit includes an exposed surface and a contact surface that are arranged opposite to each other, and the exposed surface and the connection surface are not mirror-symmetrical.

[0021] In a possible implementation, a first coating is coated on the first connecting wall of the magnet unit, and a second coating is coated on the second connecting wall, and the first coating and the second coating have different colors.

[0022] The magnet units are arranged in a non-mirror-symmetrical structure. In the process of forming a magnet by using the magnet units, the installation order of the magnet units can be quickly determined by the shape, which is beneficial to improving the assembly efficiency of the magnet units.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the magnet unit includes a connecting wall, two connecting walls of two adjacent magnet units among the multiple magnet units are adjacent, the connecting wall includes a first connecting wall and a second connecting wall arranged opposite to each other, and a first chamfer is formed at the first end of the first connecting wall.

[0024] In a possible implementation, the first chamfer may be a right angle or a rounded angle.

[0025] In combination with the first aspect, in some implementations of the first aspect, a second chamfer is provided at the second end of the first connecting wall, or a second chamfer is provided at the second end of the second connecting wall, wherein the first end and the second end are two opposite ends of the magnet unit.

[0026] In a possible implementation, the second chamfer may be a chamfered right angle or a rounded angle.

[0027] The technical solution determines the installation order of the magnet units by chamfering the magnet units. The chamfers are easy to identify by vision or image, which is conducive to the automatic assembly of the magnet units.

[0028] In combination with the first aspect, in certain implementations of the first aspect, the magnet unit includes a connecting wall, two connecting walls of two adjacent magnet units among the multiple magnet units are adjacent, the connecting wall includes a first connecting wall and a second connecting wall arranged opposite to each other, and the plane where the first connecting wall is located intersects with the plane where the second connecting wall is located.

[0029] In a possible implementation manner, the above technical solution can also be understood as that the inclination angle of the plane where the first connecting wall is located is different from the inclination angle of the plane where the second connecting wall is located.

[0030] The present technical solution provides another magnet unit with an asymmetric structure. Compared with the method of setting chamfers, the present technical solution is beneficial for obtaining a magnet unit structure with a non-mirror-symmetric structure while simplifying the processing technology of the magnet unit, which is beneficial for improving the preparation efficiency of the magnet unit.

[0031] In combination with the first aspect, in some implementations of the first aspect, a gap is provided between at least two adjacent magnet units among the plurality of magnet units.

[0032] In one possible implementation, the magnet may include one or more spaces therein.

[0033] By setting intervals between the magnet units, connecting lines between the electronic components located in the area surrounded by the magnets and the electronic components located outside the area surrounded by the magnets can be accommodated in the intervals. The implementation of this technical solution is conducive to accommodating the magnets in electronic devices with limited storage space, and is conducive to applying the magnets to different electronic devices.

[0034] In combination with the first aspect, in some implementations of the first aspect, the magnet further includes a spacing unit, the spacing unit is located between two adjacent magnet units, and the directions of magnetic lines of force of the spacing unit and the magnet units on the same side of the magnet are different.

[0035] In a possible implementation manner, the spacing unit and the magnet unit have the same shape.

[0036] In a possible implementation, the spacing unit includes a first spacing subunit and a second spacing subunit, the shape of the first spacing subunit is the same as the shape of the first magnet subunit, and the shape of the second spacing subunit is the same as the shape of the second magnet subunit. The inclination degree of the magnetic force lines in the first spacing subunit is the same as the inclination degree of the magnetic force lines in the second magnet subunit, and the inclination degree of the magnetic force lines in the second spacing subunit is the same as the inclination degree of the magnetic force lines in the first magnet subunit.

[0037] By setting a spacing unit with different magnetic force lines directions between two adjacent magnet units, when the magnet is used to attract or repel other magnets, the types of interaction forces between the magnet unit, the spacing unit and other magnets are different due to the different directions of the magnetic force lines generated by the magnet unit and the spacing unit. Such magnets with different structural units can, to a certain extent, play a role in selecting the matching angle between the two interacting magnets.

[0038] In combination with the first aspect, in certain implementations of the first aspect, the magnet also includes a back plate, the first pole and the second pole are arranged close to the connecting surface of the magnet, the back plate is fixedly connected to the connecting surface of the magnet, and the back plate can be composed of a material with a magnetic permeability greater than a preset threshold.

[0039] In some possible implementations, the connection surface and the working surface are two surfaces of the magnet disposed opposite to each other.

[0040] In a possible implementation, the back plate may be made of ferromagnetic material or soft magnetic material.

[0041] In this technical solution, a back plate composed of ferromagnetic or soft magnetic materials is connected to the connection surface of the magnet. Due to the adsorption effect of the magnet on the back plate, the back plate can play a role in relatively fixing the first magnet sub-unit and the second magnet sub-unit to a certain extent. Since the back plate is composed of ferromagnetic or soft magnetic materials, the magnetic lines of force on one side of the magnet connection surface will preferentially pass through the back plate with smaller magnetic resistance for closure. Therefore, the setting of the back plate is also conducive to reducing the external magnetic field on one side of the magnet connection surface to a certain extent, while enhancing the magnetic field of the working surface and improving the magnetic attraction.

[0042] In a second aspect, a magnet is provided, which is annular and includes a first sub-magnet and a second sub-magnet, both of which are annular. The first sub-magnet is sleeved on the outside of the second sub-magnet, the first sub-magnet and the second sub-magnet are relatively fixed, the first magnetic pole of the first sub-magnet is adjacent to the second magnetic pole of the second sub-magnet, the first magnetic pole and the second magnetic pole are opposite, and the first magnetic pole and the second magnetic pole are both arranged close to the same surface of the magnet; wherein the direction of the magnetic force lines inside the first sub-magnet is inclined to the plane where the magnet is located, and the direction of the magnetic force lines inside the second sub-magnet is inclined to the plane where the magnet is located.

[0043] In some scenarios, the direction of the magnetic force lines inside the first sub-magnet can also be understood as the magnetization direction inside the first sub-magnet, and the direction of the magnetic force lines inside the second sub-magnet can also be understood as the magnetization direction inside the second sub-magnet.

[0044] It should be noted that the fact that the direction of the magnetic force lines is inclined to the plane where the magnet is located should be understood as that the direction of the magnetic force lines is neither perpendicular to the plane where the magnet is located nor parallel to the plane where the magnet is located.

[0045] In some scenarios, the inclination of the direction of the magnetic lines of force with respect to the plane where the magnet is located can also be understood as the inclination of the direction of the magnetic lines of force with respect to the normal direction of the plane where the magnet is located.

[0046] By tilting the directions of the magnetic lines of force inside the first sub-magnet and the second sub-magnet, and setting the magnetic poles of the first sub-magnet and the second sub-magnet on the side close to each other oppositely, more magnetic lines of force can be gathered on the working surface of the magnet. In the case of using the working surface of the magnet to attract or repel other magnets, the magnet provided in the present technical solution can generate a stronger interaction force with other magnets compared to a magnet with non-tilted magnetic lines of force. From another perspective, when the interaction forces generated are equal, the magnet provided in the present technical solution is smaller in size, and occupies less space when it is housed in an electronic device.

[0047] In combination with the second aspect, in certain implementations of the second aspect, the angle between the direction of the magnetic force lines inside the first sub-magnet and the plane where the magnet is located is α, and the angle between the direction of the magnetic force lines inside the second sub-magnet and the plane where the magnet is located is β, wherein 30≤α<90°, 30≤β<90°.

[0048] The first sub-magnet and the second sub-magnet within the tilt angle range provided in the technical solution can generate a stronger magnetic field intensity on one side of the working surface, and the distribution of magnetic lines of force is denser.

[0049] In combination with the second aspect, in some implementations of the second aspect, α=β.

[0050] By setting the inclination angle of the magnetic force lines in the first sub-magnet to be the same as the inclination angle of the magnetic force lines in the second sub-magnet, after the magnetic field generated by the first sub-magnet and the magnetic field generated by the second sub-magnet are superimposed, the magnetic force lines around the magnet are sparser. When the magnet is installed in an electronic device, the magnet has less adverse effects on surrounding electronic components.

[0051] In combination with the second aspect, in some implementations of the second aspect, a width of the first sub-magnet is equal to a width of the second sub-magnet.

[0052] In some scenarios, the width of the first sub-magnet being equal to the width of the second sub-magnet can also be understood as: the difference between the outer diameter and the inner diameter of the first sub-magnet is equal to the difference between the outer diameter and the inner diameter of the second sub-magnet.

[0053] In the technical solution, by further limiting the relationship between the shapes of the first sub-magnet and the second sub-magnet, the distribution density of the magnetic lines of force around the magnet is further reduced, and the adverse effects of the magnet on surrounding electronic components are further reduced.

[0054] In combination with the second aspect, in some implementations of the second aspect, the magnet includes at least one notch.

[0055] By providing a gap on the annular magnet, the connection lines between the electronic components located in the area surrounded by the magnet and the electronic components located outside the area surrounded by the magnet can be accommodated in the gap. The implementation of this technical solution is conducive to accommodating the magnet in an electronic device with limited storage space, and is conducive to applying the magnet to different electronic devices.

[0056] In combination with the second aspect, in some implementations of the second aspect, the magnet is composed of a plurality of first magnetic parts and a plurality of second magnetic parts spaced apart, and the directions of magnetic lines of force of the first magnetic parts and the second magnetic parts on the same side of the magnet are different.

[0057] Since the first magnetic part and the second magnetic part are distributed alternately, and the directions of the magnetic lines of force of the first magnetic part and the second magnetic part on the same side of the magnet are different, the same coupling magnet will generate an attractive force on the first magnetic part and a repulsive force on the second magnetic part. In this way, the two different magnetic parts distributed alternately can play a role in selecting the angle of interaction between the two magnets when interacting with the coupling magnet.

[0058] In combination with the second aspect, in certain implementations of the second aspect, the magnet also includes a back plate, the first magnetic pole and the second magnetic pole are arranged close to the connecting surface of the magnet, the back plate is fixedly connected to the connecting surface of the magnet, and the back plate is composed of a material with a magnetic permeability greater than a preset threshold.

[0059] In some possible implementations, the connection surface and the working surface are two surfaces of the magnet disposed opposite to each other.

[0060] In a possible implementation, the back plate may be made of ferromagnetic material or soft magnetic material.

[0061] In the technical solution, a back plate composed of ferromagnetic material or soft magnetic material is connected to the connection surface of the magnet, and the back plate can play a role in relatively fixing the first sub-magnet and the second sub-magnet to a certain extent. Since the back plate is composed of a material with a certain magnetic permeability, the magnetic lines of force on one side of the magnet connection surface will preferentially pass through the back plate with a smaller magnetic resistance for closure, so the setting of the back plate is also conducive to enhancing the magnetic line density or magnetic field strength on one side of the magnet connection surface to a certain extent.

[0062] In a third aspect, an electronic device is provided, comprising: a charging coil, a mainboard and the magnet in the first aspect and any possible implementation thereof or the magnet in the second aspect and any possible implementation thereof, wherein the charging coil is located in an area surrounded by the magnet and is electrically connected to the mainboard.

[0063] In a fourth aspect, a charging device is provided, comprising: a charging coil, a circuit board, and the magnet in the first aspect and any possible implementation thereof or the magnet in the second aspect and any possible implementation thereof, the charging coil being located in an area surrounded by the magnet, and the charging coil being electrically connected to the circuit board.

[0064] In a possible implementation, the charging device further includes a cover body and a shell, wherein the cover body is disposed on the shell, and the charging coil, the circuit board and the aforementioned magnet are housed in the shell.

[0065] In a fifth aspect, a magnetic bracket is provided, comprising the magnet in the first aspect and any possible implementation thereof or the magnet in the second aspect and any possible implementation thereof.

[0066] In a sixth aspect, a shell is provided, comprising the magnet in the first aspect and any possible implementation thereof or the magnet in the second aspect and any possible implementation thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figures 1 to 4 The figure shows the distribution of magnetic lines of force of two bar magnets with different arrangements.

[0068] Figure 5 Shown is a schematic diagram of a first magnet provided in an embodiment of the present application.

[0069] Figure 6 Shown Figure 5 Schematic diagram of the AA section of the first magnet.

[0070] Figure 7 Shown Figure 5 Schematic diagram of the distribution of magnetic lines of force around the first magnet in .

[0071] Figure 8 and Fig. 9 Two possible shapes of the first magnet are shown.

[0072] Figures 10 to 17 Shown is a schematic diagram of a combined magnet assembled using the first magnet as a structural unit.

[0073] Fig.18 and Fig.19 Two further possible shapes of the first magnet are shown.

[0074] Fig. 20 Shown by Fig.18 The first magnet in the figure is a schematic diagram of a combined magnet assembled from structural units.

[0075] Fig.21 Shown by Fig.19 The first magnet in the figure is a schematic diagram of a combined magnet assembled from structural units.

[0076] Fig. 22 Shown is yet another possible shape of the first magnet.

[0077] Fig.23 Shown by Fig. 22The first magnet in the figure is a schematic diagram of a combined magnet assembled from structural units.

[0078] Figure 24 to Figure 27 Shown is a schematic diagram of a ring-shaped first magnet.

[0079] Fig.28 Shown is a schematic diagram of a first magnet provided with a backing plate.

[0080] Fig.29 Shown is a schematic diagram of a magnetic ring pair provided in an embodiment of the present application.

[0081] Fig.30 Shown Fig.29 Schematic diagram of the radial cross section of the central magnetic ring pair.

[0082] Fig.31 Shown is a schematic diagram of another magnetic ring pair provided in an embodiment of the present application.

[0083] Fig.32 Shown Fig.31 Schematic diagram of the radial cross section of the central magnetic ring pair.

[0084] Fig.33 Shown is a schematic diagram of another magnetic ring pair provided in an embodiment of the present application.

[0085] Fig.34 Shown Fig.33 Schematic diagram of the radial cross section of the central magnetic ring pair.

[0086] Fig.35 Shown is a schematic diagram of a wireless charging base including a first magnet provided in an embodiment of the present application.

[0087] Fig.36 Shown is a schematic diagram of an electronic device including a first magnet provided in an embodiment of the present application. DETAILED DESCRIPTION

[0088] Embodiments of the present application are described in detail below, and examples of the embodiments of the present application are shown in the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0089] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons having ordinary skills in the technical field to which this application belongs. In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying 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 to this application.

[0090] Figures 1 to 4 The following are the magnetic field distributions of several combinations of two bar magnets, among which: Figure 1 The figure shows the distribution of magnetic lines of force when two bar magnets with different polarities face each other. Figure 2 The figure shows the distribution of magnetic field lines when two bar magnets have the same polarity facing each other. Figure 3 The figure shows the distribution of magnetic lines of force when two bar magnets with different polarities are placed side by side. Figure 4 The figure shows the distribution of magnetic lines of force when two bar magnets of the same polarity are placed side by side. As can be seen from the figure, the two magnets are surrounded by magnetic lines of force. When these magnets are applied to electronic devices, the magnetic field around the magnets will have an adverse effect on the normal operation of electronic components in various positions around them. In addition, since the magnetic field generated by the magnet is relatively dispersed, the distribution of magnetic lines of force in the main working direction of the magnet is not concentrated enough, and the working performance of the magnet is limited.

[0091] In order to improve the distribution of the magnetic field generated by the magnet, reduce the adverse effects of the magnetic field on the operation of surrounding electronic components, and improve the working performance of the magnet, the present application provides a first magnet 10, in which the direction of the magnetic lines of force in the magnet is inclined to the normal of the plane where the magnet is located, and more magnetic lines of force can be concentrated in the upper space or lower space of the plane where the magnet is located. Under the same conditions, the interaction force generated between the magnet and other magnets is greater.

[0092] Figure 5 FIG. 1 is a schematic diagram showing the structure of the first magnet 10A. Figure 6 FIG. 1 is a schematic diagram of the AA section of the first magnet 10A. Figure 7 FIG. 1 is a schematic diagram showing the distribution of magnetic field lines around the first magnet 10A.

[0093] The first magnet 10A includes a first sub-magnet 110 and a second sub-magnet 120, and the first sub-magnet 110 is disposed adjacent to the second sub-magnet 120. The direction of the magnetic field lines in the first sub-magnet 110 is inclined to the normal direction of the plane where the first magnet 10A is located ( Figure 6In other words, the angle between the direction of the magnetic lines of force in the first sub-magnet 110 and the normal direction of the plane where the first magnet 10A is located is γ1, 0<γ1<90°.

[0094] The above description about the direction of the magnetic lines of force in the first sub-magnet 110 can also be understood as: the magnetization direction on the AA section of the first sub-magnet 110 forms an acute angle with the plane where the first magnet 10A is located, or the magnetization direction on the AA section of the first sub-magnet 110 forms an angle of (90°-γ1) with the plane where the first magnet 10A is located, 0<γ1<90°.

[0095] The direction of the magnetic field lines in the second sub-magnet 120 is the normal to the plane where the first magnet 10A is located ( Figure 6 In other words, the angle between the direction of the magnetic lines of force in the second sub-magnet 120 and the normal direction of the plane where the first magnet 10A is located is γ2, 0<γ2<90°.

[0096] The above description about the direction of the magnetic lines of force in the second sub-magnet 120 can also be understood as: the magnetization direction on the AA section of the second sub-magnet 120 forms an acute angle with the plane where the first magnet 10 is located, or the magnetization direction on the AA section of the second sub-magnet 120 forms an angle of (90°-γ2) with the plane where the first magnet 10 is located, 0<γ2<90°.

[0097] Combination Figure 7 , the magnetic lines of force around the first magnet 10A are mainly concentrated in the upper space of the upper surface of the first magnet 10A, and the upper surface of the first magnet 10A can also be called the working surface of the first magnet 10A. In some examples, the N and S polarities of the adjacent areas of the first sub-magnet 110 and the second sub-magnet 120 on the working surface (or attraction surface, repulsion surface) of the first magnet 10A are opposite. In other words, Figure 5 The N and S polarities of the A1 region of the first sub-magnet 110 are opposite to the N and S polarities of the A2 region of the second sub-magnet 120. In other words, the opposite magnetic poles of the first sub-magnet 110 and the second sub-magnet 120 are arranged adjacent to each other and are both arranged close to the same surface of the first magnet 10A.

[0098] In some examples, the upper left corner of the first sub-magnet 110 exhibits an N-pole property, and the lower right corner of the first sub-magnet 110 exhibits an S-pole property.

[0099] In some examples, the upper right corner of the second sub-magnet 120 exhibits an S-pole property, and the lower left corner of the second sub-magnet 120 exhibits an N-pole property.

[0100] In order to improve the distribution of the magnetic lines of force of the first magnet 10A in space, so that fewer magnetic lines of force are distributed around the first magnet 10A and more magnetic lines of force are distributed in the upper space and / or lower space of the first magnet 10A, in some examples, the aforementioned angle γ1 is equal to the angle γ2.

[0101] In some examples, the angle between the direction of the magnetic force lines in the first sub-magnet 110 and the direction of the magnetic force lines in the second sub-magnet 120 is 180°-(γ1+γ2). Exemplarily, the direction of the magnetic force lines in the first sub-magnet 110 points to the working surface, and the direction of the magnetic force lines in the second sub-magnet 120 points to the other side opposite to the working surface.

[0102] Likewise, in order to improve the distribution of the magnetic lines of force of the first magnet 10A in space, the shape and size of the first sub-magnet 110 may be substantially consistent with the shape and size of the second sub-magnet 120 .

[0103] In some examples, the length of the first sub-magnet 110 may be equal to the length of the second sub-magnet 120, that is, the first sub-magnet 110 and the second sub-magnet 120 are Figure 5 The dimensions along the X-axis are equal.

[0104] In some examples, the width of the first sub-magnet 110 may be equal to the width of the second sub-magnet 120, that is, the first sub-magnet 110 and the second sub-magnet 120 are Figure 5 The dimensions in the Y-axis direction are equal.

[0105] In some examples, the height of the first sub-magnet 110 may be equal to the height of the second sub-magnet 120, that is, the first sub-magnet 110 and the second sub-magnet 120 are Figure 5 The dimensions in the Z-axis direction are equal.

[0106] By setting the shapes and sizes of the first sub-magnet 110 and the second sub-magnet 120 to be basically the same, the magnetic force lines generated by the first sub-magnet 110 and the second sub-magnet 120 are superimposed, which results in the distribution of the magnetic force lines around the first magnet 10A being more sparse, and the distribution of the magnetic force lines in the upper space and / or lower space of the first magnet 10A being more dense. In this way, when the working surface of the first magnet 10A is used to interact with other magnets, the interaction force generated between the first magnet 10A and the other magnets is stronger, and the first magnet 10 has less adverse effects on the normal operation of the surrounding electronic components.

[0107] From another perspective, in the above scheme, by changing the direction of the magnetic lines of force in the first magnet 10A, or in other words, by changing the magnetization direction in the first magnet 10A, more magnetic lines of force can be concentrated in the space corresponding to the working surface of the first magnet 10A, and the first magnet 10A with less material and smaller volume can produce a similar magnetic line distribution to that produced by a magnet with larger material and larger volume, thereby reducing the space occupied by the first magnet and reducing the material cost of the first magnet.

[0108] For different application scenarios, the first magnet may also have other different shapes. Accordingly, the first sub-magnet 110 and the second sub-magnet 120 included in the first magnet may also have different shapes. Figure 8 and Fig. 9 Two top views of first magnets of different shapes are provided as examples.

[0109] like Figure 8 As shown, the first magnet 10B may be in the shape of a prism, and the first sub-magnet 110 and the second sub-magnet 120 are also in the shape of a prism. The first sub-magnet 110 and the second sub-magnet 120 together constitute the first magnet 10B. Figure 6 The cross section shown in can be considered as Figure 8 Medium waist trapezoidal BB section.

[0110] by Figure 8 Taking the isosceles trapezoid on the left side as the first sub-magnet 110 and the isosceles trapezoid on the right side as the second sub-magnet 120 as an example, the first sub-magnet 110 is connected to the second sub-magnet 120, and the contact surface between the first sub-magnet 110 and the second sub-magnet 120 can be called the first contact surface, and the contact surface between the second sub-magnet 120 and the first sub-magnet 110 can be called the second contact surface. In some examples, the first contact surface and the second contact surface are consistent in shape and size.

[0111] The outer surface of the first sub-magnet 110 adjacent to the first contact surface may be referred to as the side wall of the first sub-magnet 110, the other outer surface of the first sub-magnet 110 opposite to the first contact surface may be referred to as the first exposed surface of the first sub-magnet 110, and the first contact surface and the first exposed surface may be respectively regarded as the upper bottom surface and the lower bottom surface of the first sub-magnet 110. Similarly, the outer surface of the second sub-magnet 120 adjacent to the second contact surface may be referred to as the side wall of the second sub-magnet 120, the other outer surface of the second sub-magnet 120 opposite to the second contact surface may be referred to as the second exposed surface of the second sub-magnet 120, and the second exposed surface and the second contact surface may be respectively regarded as the upper bottom surface and the lower bottom surface of the second sub-magnet 120.

[0112] In some examples, the two angles between the first contact surface of the first sub-magnet 110 and the plane where the side wall is located are equal to the two angles between the second contact surface of the second sub-magnet 120 and the plane where the side wall is located. In other words, the side wall of the first sub-magnet 110 and the side wall of the second sub-magnet 120 transition smoothly at the position where the two meet.

[0113] In some examples, the first exposed surface, the first contact surface, the second contact surface, and the second exposed surface of the first magnet 10B may be arranged in parallel.

[0114] In some examples, the shapes of the first sub-magnet 110 and the second sub-magnet 120 may be substantially the same. For example, the width of the first sub-magnet 110 and the width of the second sub-magnet 120 may be equal, or in other words, Figure 8 The distance between the first contact surface and the first exposed surface of the first sub-magnet 110 is equal to the distance between the second contact surface and the second exposed surface of the second sub-magnet 120.

[0115] like Fig. 9 As shown, the first magnet 10C may be in the shape of an axisymmetric sector ring, and the first sub-magnet 110 and the second sub-magnet 120 may also be axisymmetric sector rings. The first sub-magnet 110 and the second sub-magnet 120 together constitute the first magnet 10C. Figure 6 The cross section shown in Fig. 9 CC section of the middle sector ring.

[0116] Fig. 9 The fan ring on the left side can be regarded as the first sub-magnet 110, and the fan ring on the right side can be regarded as the second sub-magnet 120. The first sub-magnet 110 is connected to the second sub-magnet 120, and the contact surface between the first sub-magnet 110 and the second sub-magnet 120 can be called the first contact surface, and the contact surface between the second sub-magnet 120 and the first sub-magnet 110 can be called the second contact surface.

[0117] In some examples, the first contact surface and the second contact surface are consistent in shape and size. In other words, the fan-shaped first sub-magnet 110 is located outside the fan-shaped second sub-magnet 120, the arc surface of the first sub-magnet 110 close to the second sub-magnet 120 can be called the first inner wall, the arc surface of the first sub-magnet 110 away from the second sub-magnet 120 can be called the first outer wall, the arc surface of the second sub-magnet 120 close to the first sub-magnet 110 can be called the second outer wall, the arc surface of the second sub-magnet 120 away from the first sub-magnet 110 can be called the second inner wall, and the first inner wall and the second outer wall are equal in shape and size.

[0118] In some examples, the shapes of the first sub-magnet 110 and the second sub-magnet 120 may be substantially the same. For example, the width of the first sub-magnet 110 is equal to the width of the second sub-magnet 120, or in other words, Fig. 9The difference between the outer diameter and the inner diameter of the sector ring corresponding to the first sub-magnet 110 is equal to the difference between the outer diameter and the inner diameter of the sector ring corresponding to the second sub-magnet 120.

[0119] In some examples, Figure 5 The first rectangular parallelepiped magnet 10A shown, Figure 8 The first prism-shaped magnet 10B and Fig. 9 The fan-shaped first magnet 10C is spliced ​​as a structural unit to obtain different splicing shapes.

[0120] like Fig.10 and Fig.11 As shown, the rectangular first magnet 10A can be used as a structural unit to form a long strip first magnet group 200 or a polygonal second magnet group 310. In the case where the length of the rectangular first magnet 10A is short, such as Fig.11 The polygonal second magnet group 310 shown may be approximately in the shape of a circular ring.

[0121] In some examples, the plurality of first magnets 10A may be approximately spliced ​​into an open ring shape, or in other words, Fig.11 The second magnet group 310 shown as being approximately annular may be provided with a gap. For example, the non-closed annular ring may be in an axisymmetric shape.

[0122] In some examples, the plurality of first magnets 10A may be distributed discontinuously in an axisymmetric manner to form a magnet group, and the magnet group may include an even number or an odd number of first magnets 10A.

[0123] like Fig.12 As shown, the prism-shaped first magnet 10B can be spliced ​​as a structural unit to form a polygonal third magnet group 320. When the size of the isosceles trapezoid is small, Fig.12 The polygonal third magnet group 320 is approximately in the shape of a circular ring.

[0124] In some examples, a plurality of first magnets 10B can be spliced ​​into an approximately open ring shape. In other words, Fig.12 The third magnet group 320 shown as being approximately annular may be provided with a gap. Exemplarily, the non-closed annular ring may be in an axisymmetric shape.

[0125] In some examples, the plurality of first magnets 10B may be distributed discontinuously in an axisymmetric manner to form a magnet group, and the magnet group may include an even number or an odd number of first magnets 10B.

[0126] like Fig.13 As shown, the fan-shaped first magnet 10C as a structural unit can be assembled into a circular ring-shaped fourth magnet group 330.

[0127] In some examples, the plurality of first magnets 10C may be approximately spliced ​​into an open ring shape, such as Fig.14 The fifth magnet group 331 is shown. Exemplarily, the fifth magnet group 331 may be axisymmetric about the symmetry axis WW.

[0128] In some examples, the plurality of first magnets 10C may be distributed discontinuously and axially symmetrically to form a Fig.15 The sixth magnet group 332 shown in FIG. 3 may include an even number or an odd number of first magnets 10C, and the plurality of first magnets 10C may be distributed in an axisymmetric manner about the symmetry axis WW. Similarly, the plurality of first magnets 10C may also be distributed in a center-symmetrical manner, for example, about Fig.15 The symmetry center point C in the figure is centrally symmetrical.

[0129] Above Figures 11 to 13 Since the approximately annular combined magnets in the embodiment are all composed of the same first magnet, the distribution of magnetic lines of force at various positions on the annular ring is basically the same. In some examples, first magnets of the same shape but different properties can be used as structural units to form annular rings with different distributions of magnetic lines of force at different positions on the annular surface. Fig.16 and Fig.17 Two examples are provided.

[0130] Fig.16 and Fig.17 The annular combined magnets in the embodiment are composed of two structural units of the same shape but different properties, which can be respectively referred to as the first structural unit 21 and the second structural unit 22. The shapes of the first structural unit 21 and the second structural unit 22 are similar to the aforementioned fan-shaped first magnet 10C.

[0131] The first structural unit 21 is composed of a first sub-structural unit and a second sub-structural unit. The first sub-structural unit is located outside the second sub-structural unit. The first sub-structural unit and the second sub-structural unit are both approximately fan-shaped. Fig. 9 The shape of the first sub-magnet 110 and the direction of the internal magnetic field lines are consistent, and the shape of the second sub-structure unit and the direction of the internal magnetic field lines are consistent with the above method. Fig. 9 The shape of the second sub-magnet 120 is consistent with the direction of the internal magnetic field lines. Fig. 9 For the sake of brevity, the relevant contents in are not repeated here.

[0132] The second structural unit 22 is composed of a third sub-structural unit and a fourth sub-structural unit. The third sub-structural unit is located outside the fourth sub-structural unit. The third sub-structural unit and the fourth sub-structural unit are both approximately fan-shaped. Fig. 9The shape of the first sub-magnet 110 is consistent with that of the first sub-magnet 110, and the direction of the magnetic field lines inside the third sub-structure unit is consistent with that of the first sub-magnet 110. Fig. 9 The direction of the magnetic field lines inside the second sub-magnet 120 is consistent. The shape of the fourth sub-structure unit is the same as that of the aforementioned Fig. 9 The shape of the second sub-magnet 120 is consistent with that of the fourth sub-structure unit, and the direction of the magnetic field lines inside the fourth sub-structure unit is consistent with that of the aforementioned Fig. 9 The directions of the magnetic lines of force inside the first sub-magnet 110 are consistent. For the description of the third sub-structure unit and the fourth sub-structure unit, please refer to Fig. 9 For the sake of brevity, the relevant contents in are not repeated here.

[0133] Fig.16 In the embodiment, the first structural unit 21 and the second structural unit 22 are arranged alternately to form a seventh magnet group 334. Fig.17 In the embodiment, the combined magnetic ring is assembled in an arrangement of two first structural units 21 and two second structural units 22 to form the eighth magnet group 335. In some examples, the direction of the magnetic force lines in the upper space of the working surface of the first structural unit 21 is toward the first direction, and the direction of the magnetic force in the upper space of the working surface of the second structural unit 22 is away from the first direction.

[0134] use Fig.16 or Fig.17 The structure of the annular magnet group formed by the assembly and arrangement method shown in the figure has magnetic lines of force in different directions distributed alternately on the ring surface of the magnetic ring. When this magnet group is used to repel or attract other annular magnets, when the first structural unit 21 exhibits an attractive force with the other magnets, the second structural unit 22 exhibits a repulsive force with the same magnet. The two structural units with opposite directions of magnetic lines of force can, to a certain extent, play a role in selecting the angle for the two magnets to cooperate with each other when the combined magnetic ring interacts with the other magnets.

[0135] Since the magnetic poles corresponding to the two opposite sides or two faces of the first magnet are different, for the first magnets in mirror-symmetrical shapes such as the rectangular parallelepiped, prism-shaped or mirror-symmetrical fan-shaped, in the process of splicing and assembling multiple magnets, the magnetic poles or installation order of the first magnets cannot be correctly determined based solely on the shape of the first magnets, and the assembly efficiency of the first magnets is relatively low. In order to improve the splicing and assembly efficiency of the first magnets, the first magnets in non-mirror-symmetrical shapes can be used as structural units for assembly. Fig.18 and Fig.19 and Fig. 22 Some front views of first magnets with non-mirror-symmetrical shapes are provided as examples.

[0136] In some examples, rounded corners or chamfered corners are respectively provided on different parts of the two sub-magnets of the fan-shaped first magnet 10C, and the splicing order of the first magnet 10C can be determined according to the positions of the chamfers.

[0137] like Fig.18 The schematic diagram of the first magnet 10D is shown, and a first chamfer 31 can be provided near the connection position between the first outer wall and the side wall of the first sub-magnet 110 located on the left, and a second chamfer 32 can be provided near the connection position between the second inner wall and the side wall of the second sub-magnet 120 located on the right. The first chamfer 31 and the second chamfer 32 can be located on the side wall on the same side of the first magnet 10D.

[0138] like Fig.19 The schematic diagram of the first magnet 10E is shown, and a third chamfer 33 can be provided near the connection position between the first outer wall and the side wall of the first sub-magnet 110 located on the left, and a fourth chamfer 34 can be provided near the connection position between the second inner wall and the side wall of the second sub-magnet 120 located on the right. The third chamfer 33 and the fourth chamfer 34 can be located on the side walls of different sides of the first magnet 10E.

[0139] In the actual assembly process, the efficiency of splicing and assembling multiple first magnets can be greatly improved by assembling them according to the splicing and assembling rules that the chamfers of two adjacent first magnets do not touch each other, or in other words, the "chamfers" and "non-chamfers" are spaced apart from each other.

[0140] Fig. 20 Shown Fig.18 The first magnet 10D in the embodiment is spliced ​​and assembled to form a ninth magnet group 340 which is approximately annular. Fig.21 Shown Fig.19 The first sub-magnetic ring located outside the ninth magnet group 340 and the tenth magnet group 350 is obtained by splicing the first sub-magnets 110 located in the first magnet 10D or the first magnet 10E together, and the second sub-magnetic ring located inside the magnet group is obtained by splicing the second sub-magnets 120 located in the first magnet 10D or the first magnet 10E together.

[0141] In some examples, the installation order of the first magnets can be determined according to the different side walls by setting the two side walls of the first magnets with different inclination angles.

[0142] Fig. 22As shown, the line connecting the midpoints of the two side walls of the first magnet 10F is used as a reference line, the angle formed between the first side wall of the first magnet 10F and the reference line is θ1, and the angle formed between the second side wall of the first magnet 10F and the reference line is θ2. The angle θ1 and the angle θ2 can respectively reflect the inclination of the first side wall and the inclination of the second side wall. In the process of manufacturing the first magnet 10F, the difference between the two angles can be appropriately increased to expand the difference between the inclination of the first side wall and the inclination of the second side wall, reduce the probability of the first magnet 10F being installed in reverse order, and improve the splicing and assembly efficiency of multiple first magnets 10F.

[0143] It should be understood that the different degrees of inclination of the first side wall and the second side wall can also be explained by other reference lines or reference planes. For example, by taking the center plane determined by the midlines of the upper and lower bottom surfaces of the first magnet 10F as the reference plane and examining the angles between the first side wall and the second side wall and the reference plane respectively, the degrees of inclination of the first side wall and the second side wall can be determined.

[0144] In the actual assembly process, multiple first magnets 10F can be spliced ​​in such a way that the two side walls of two adjacent magnets with different inclinations abut against each other to obtain the following: Fig.23 The eleventh magnet group 360 is shown to be approximately annular in shape.

[0145] The above only lists some asymmetric structures of the first magnet by way of example. It should be understood that the first magnet can also be other more asymmetric structures. For example, the working surface and the connecting surface of the first magnet are two asymmetric surfaces, a chamfer is provided at the connection between the exposed surface and the working surface of the first magnet, a chamfer is provided at the connection between the contact surface and the connecting surface of the first magnet, the left and right side walls of the first magnet are coated with coatings of different colors, and the present application does not impose any restrictions on this.

[0146] Fig.23 In the eleventh magnet group 360 shown, the first sub-magnets 110 in the first magnet 10F are connected to each other to form a first sub-magnetic ring on the outside of the combined magnet, and the second sub-magnets 120 in the first magnet 10F are spliced ​​to each other to form a second sub-magnetic ring on the inside of the combined magnet.

[0147] like Fig.24 As shown, in some examples, the first magnet 10G can be annular, and the first sub-magnet 110 and the second sub-magnet 120 included in the first magnet 10G can also be annular, the first sub-magnet 110 is located on the outside of the second sub-magnet 120, and the radius of the inner ring of the first sub-magnet 110 is equal to the radius of the outer ring of the second sub-magnet 120.

[0148] In some examples, the shapes of the first sub-magnet 110 and the second sub-magnet 120 may be substantially the same. For example, the width of the annular first sub-magnet 110 and the width of the annular second sub-magnet 120 are equal. Figure 6 The cross section shown in Fig.24 The GG cross section of the first ring-shaped magnet along the diameter direction of the ring.

[0149] In some examples, the annular first magnet 10G may be composed of a plurality of first magnetic parts and a plurality of second magnetic parts arranged at intervals, and the directions of the magnetic lines of force of the first magnetic parts and the second magnetic parts on one side of the first magnet 10G are opposite. Fig.16 or Fig.17 The structure of the first structural unit 21 shown in FIG. 1 is similar to that of the first structural unit 21, and the structure of the second magnetic part can be the same as that of the aforementioned Fig.16 or Fig.17 The structure of the second structural unit 22 shown in FIG. 2 is similar to that of the second structural unit 22 , and is not described here for brevity.

[0150] The magnetic lines of force in different directions are distributed alternately on the ring surface of the magnetic ring. When the annular first magnet 10G is used to repel or attract other annular magnets, the first magnetic part and the other magnets show an attractive force, while the second magnetic part and the same magnet show a repulsive force. The two magnetic parts with opposite directions of the magnetic lines of force can play a role in selecting the angle of interaction when the combined magnetic ring interacts with the other magnets.

[0151] The annular first magnet 10G may be provided with one or more notches, for example, Fig.25 As shown, the first ring-shaped magnet 10G is provided with a first notch 41. Fig.26 As shown, the annular first magnet 10G may be provided with two second notches 42 and third notches 43 that are axially symmetrically distributed, or in other words, the annular first magnet 10G may be composed of two axially symmetrically distributed sector rings. Fig. 27 As shown, the annular first magnet 10G may be provided with three centrally symmetrically distributed notches, namely a fourth notch 44, a fifth notch 45 and a sixth notch 46. In other words, the annular first magnet 10G may be composed of three centrally symmetrical sector rings.

[0152] The annular first magnet 10G can be prepared by an integrated molding process, and one or more gaps opened on the first magnet 10G can be used to connect the internal area and the external area surrounded by the annular first magnet 10G. For example, the one or more gaps can be used to accommodate circuits connecting electronic components located in the internal area of ​​the first magnet 10G and electronic components outside the first magnet 10G.

[0153] like Fig.28As shown, the aforementioned various first magnets may be provided with a back plate 30 , and the back plate 30 may be used to achieve relative fixation between the first sub-magnet 110 and the second sub-magnet 120 in the first magnet.

[0154] In some examples, the back plate 30 can be disposed on a side of the first magnet where the magnetic force lines are relatively sparse. In other words, the side of the first magnet where the magnetic force lines are relatively sparse can be fixedly connected to the back plate 30, in which case the positions of the first sub-magnet 110 and the second sub-magnet 120 constituting the first magnet are also relatively fixed.

[0155] The shape of the back plate 30 can be determined according to the shape of the first magnet. In some examples, the first magnet is annular, or a plurality of first magnets can form annular or polygonal shapes. The width of the annular back plate 30 should be slightly larger than the width of the first magnet so that the projection of the first magnet in the plane where the back plate 30 is located can fall within the range of the back plate 30. For example, the first magnet is as follows: Figure 5 The cuboid shown, the back plate can also be a rectangular plate structure.

[0156] In some examples, the back plate 30 may also be made of a material with a magnetic permeability greater than a preset threshold, such as a ferromagnetic material or a soft magnetic material, etc. In this way, the magnetic lines of force emitted from the first magnet can be preferentially closed through the magnetic conductive back plate 30 with a smaller magnetic resistance, which is beneficial to reducing the magnetic field on one side of the back plate 30 and enhancing the magnetic field on the working surface, which is beneficial to improving the interaction force between the first magnet and other magnets.

[0157] like Figures 29 to 34 Shown are the structures of several magnetic ring pairs provided in the embodiments of the present application and corresponding cross-sectional schematic diagrams. The magnetic ring pairs include a first magnetic ring and a second magnetic ring that cooperate with each other. There may be a mutual attraction force between the first magnetic ring and the second magnetic ring, and there may also be a mutual repulsion force between the first magnetic ring and the second magnetic ring. The following examples are mainly based on the mutual attraction between the two magnetic rings.

[0158] The structure of at least one of the first magnetic ring and the second magnetic ring is similar to the structure of the annular first magnet or the annular magnet group composed of multiple first magnets in the aforementioned embodiment, which is beneficial to enhance the interaction force between the two magnetic rings. Figures 29 to 34 The structure of the first magnetic ring is basically similar, and the structure of the first magnetic ring is first described below.

[0159] like Fig.29 As shown, the first magnetic ring 500 has a similar structure to the annular first magnet 10G in the aforementioned embodiment. The first magnetic ring 500 includes a first sub-magnetic ring and a second sub-magnetic ring. The first sub-magnetic ring is located on the outside of the second sub-magnetic ring, and the inner wall of the first sub-magnetic ring is in contact with the outer wall of the second sub-magnetic ring. In other words, the inner diameter of the first sub-magnetic ring is substantially equal to the outer diameter of the second sub-magnetic ring.

[0160] The PP cross section of the first magnetic ring 500 along the radial direction is as follows: Fig.30 As shown, the rectangle on the left corresponds to the cross section of the first sub-magnetic ring, and the rectangle on the right corresponds to the cross section of the second sub-magnetic ring. The directions of the arrows in the two rectangles can represent the directions of the magnetic lines of force inside the first sub-magnetic ring and the directions of the magnetic lines of force inside the second sub-magnetic ring, respectively. The directions of the magnetic lines of force inside the first sub-magnetic ring are tilted to the axial direction of the first magnetic ring 500, or in other words, the directions of the magnetic lines of force inside the first sub-magnetic ring are tilted to the normal direction of the plane where the first magnetic ring 500 is located. The directions of the magnetic lines of force inside the second sub-magnetic ring are tilted to the axial direction of the first magnetic ring 500, or in other words, the directions of the magnetic lines of force inside the second sub-magnetic ring are tilted to the normal direction of the plane where the first magnetic ring 500 is located.

[0161] Exemplarily, the angle between the direction of the magnetic force lines inside the first sub-magnetic ring and the axial direction of the first magnetic ring 500 is α1, and the angle between the direction of the magnetic force lines inside the second sub-magnetic ring and the axial direction of the first magnetic ring 500 is α2. Then: the value range of α1 is: 0<α1<90°, and the value range of α2 is: 0<α2<90°.

[0162] In order to further improve the distribution of the magnetic lines of force of the first magnetic ring 500 and enhance the interaction force between the first magnetic ring 500 and the second magnetic ring 600, the value range of α1 can be set to: 0<α1≤60°, for example, 15°, 30°, 45° or 60°, etc. The value range of α2 can be set to: 0<α2≤60°, for example, 15°, 30°, 45° or 60°, etc.

[0163] The magnetic poles on both sides of the contact surface between the first sub-magnetic ring and the second sub-magnetic ring may be opposite, so that more magnetic lines of force can be distributed near a side of the first magnetic ring 500 close to the second magnetic ring 600. For example, the S pole of the first sub-magnetic ring may be adjacent to or connected to the N pole of the second sub-magnetic ring, or the N pole of the first sub-magnetic ring may be adjacent to or connected to the S pole of the second sub-magnetic ring.

[0164] By adjusting the relationship between the direction of the magnetic force lines inside the first sub-magnetic ring and the direction of the magnetic force lines inside the second sub-magnetic ring, the distribution of the magnetic force lines of the first magnetic ring 500 can be further improved, and the interaction force between the first magnetic ring 500 and the second magnetic ring 600 can be increased. Exemplarily, there may be a certain difference between the aforementioned angle α1 and the angle α2, and exemplarily, α1-α2=σ, and the value range of σ is: -5°≤σ≤5°, for example, -5°, -3°, 0°, 3° or 5°, etc.

[0165] In some examples, the width of the first sub-magnetic ring and the width of the second sub-magnetic ring can be equal, or in other words, the widths of the two rectangles on the left and right sides of the cross section of the first magnetic ring 500 are equal. By setting the width of the first sub-magnetic ring and the width of the second sub-magnetic ring to be equal, the magnetic force lines of the first sub-magnetic ring and the magnetic force lines of the second sub-magnetic ring located on the inner and outer sides of the first magnetic ring 500 can offset each other as much as possible, and the magnetic force lines of the first sub-magnetic ring and the magnetic force lines of the second sub-magnetic ring located on the side of the first magnetic ring 500 close to the second magnetic ring 600 can be superimposed on each other, so that the interaction force between the first magnetic ring 500 and the second magnetic ring 600 can be enhanced.

[0166] In some examples, a third sub-magnetic ring may be provided between the first sub-magnetic ring and the second sub-magnetic ring, and the direction of the magnetic force lines inside the third sub-magnetic ring may be along the radial direction of the first magnetic ring 500, or in other words, the direction of the magnetic force lines inside the third sub-magnetic ring may be perpendicular to the normal of the plane where the first magnetic ring 500 is located. The N pole in the third sub-magnetic ring may be provided close to the S pole of the first sub-magnetic ring, and the S pole in the third sub-magnetic ring may be provided close to the N pole of the second sub-magnetic ring.

[0167] In some examples, the first magnetic ring 500 may further include a fourth sub-magnetic ring and a fifth sub-magnetic ring, the fourth sub-magnetic ring may be located outside the fifth sub-magnetic ring, the inner wall of the fourth sub-magnetic ring contacts the outer wall of the fifth sub-magnetic ring, and the outer wall of the fourth sub-magnetic ring contacts the inner wall of the second sub-magnetic ring. In other words, the first magnetic ring 500 may be regarded as a concentric ring structure formed by the first sub-magnetic ring, the second sub-magnetic ring, the fourth sub-magnetic ring, and the fifth sub-magnetic ring being nested in sequence.

[0168] The structure of the fourth sub-magnetic ring is similar to that of the first sub-magnetic ring, and the structure of the fifth sub-magnetic ring is similar to that of the second sub-magnetic ring. The structure of the fourth sub-magnetic ring and the structure of the fifth sub-magnetic ring can refer to the description of the structure of the first sub-magnetic ring and the structure of the second sub-magnetic ring in the previous text, and for the sake of brevity, they are not repeated here.

[0169] The structure of the coupling magnetic ring that interacts with the first magnetic ring 500 can be determined according to the type of interaction between the two magnetic rings. In some examples, there is a mutual attraction force between the first magnetic ring 500 and the coupling magnetic ring.

[0170] Fig.29 and Fig.30Also shown is a structure of a second magnetic ring 600 coupled to the first magnetic ring 500 and a radial cross section thereof, wherein the second magnetic ring 600 may include a sixth sub-magnetic ring 610 and a seventh sub-magnetic ring 620, wherein the sixth sub-magnetic ring 610 is located outside the seventh sub-magnetic ring 620, and the sixth sub-magnetic ring 610 and the seventh sub-magnetic ring 620 are spaced apart from each other. In other words, the inner diameter of the sixth sub-magnetic ring 610 is greater than the outer diameter of the seventh sub-magnetic ring 620, or in other words, a spaced area may be provided between the sixth sub-magnetic ring 610 and the seventh sub-magnetic ring 620, and the spaced area may also be referred to as a non-magnetic area.

[0171] In combination with the cross-sectional schematic diagram of the second magnetic ring 600, the direction of the magnetic force lines inside the sixth sub-magnetic ring 610 located on the outside and the direction of the magnetic force lines inside the seventh sub-magnetic ring 620 located on the inside are both parallel to the axial direction of the second magnetic ring 600. The direction of the magnetic force lines inside the sixth sub-magnetic ring 610 is opposite to the direction of the magnetic force lines inside the seventh sub-magnetic ring 620. Specifically, the S pole of the sixth sub-magnetic ring 610 is arranged close to the N pole of the first sub-magnetic ring, the N pole of the sixth sub-magnetic ring 610 is arranged away from the N pole of the first sub-magnetic ring, the N pole of the seventh sub-magnetic ring 620 is arranged close to the S pole of the second sub-magnetic ring, and the S pole of the seventh sub-magnetic ring 620 is arranged away from the S pole of the second sub-magnetic ring.

[0172] In order to enable the magnetic lines of force between the first magnetic ring 500 and the second magnetic ring 600 to be more used to enhance the interaction force between the two magnetic rings, in some examples, the shape of the first magnetic ring 500 and the shape of the second magnetic ring 600 can match. Specifically, the distance R1 between the center O1 of the first magnetic ring 500 and the center line of the magnetic ring cross section and the distance R2 between the center O2 of the second magnetic ring 600 and the center line of the magnetic ring cross section should be basically equal, or in other words, the difference δ between the aforementioned R1 and R2 should be less than a preset threshold.

[0173] The matching relationship between the shape of the first magnetic ring 500 and the shape of the second magnetic ring 600 can also be understood as: the two cross sections of the first magnetic ring 500 and the second magnetic ring 600 at the same position are axially symmetric about the same straight line, or in other words, the center lines of the two cross sections coincide.

[0174] D1 and D2 represent the width of the first magnetic ring 500 and the width of the second magnetic ring 600, respectively. In some examples, D2 ≥ D1. Since the magnetic force lines inside the first sub-magnetic ring and the magnetic force lines inside the second sub-magnetic ring are both inclined, the wider second magnetic ring 600 is conducive to allowing the magnetic force lines emitted by the first magnetic ring 500 to enter more into the second magnetic ring 600, and is also conducive to allowing the magnetic force lines emitted by the second magnetic ring 600 to enter more into the first magnetic ring 500, thereby facilitating the increase of the interaction force between the first magnetic ring 500 and the second magnetic ring 600.

[0175] In some examples, the width of the second magnetic ring 600 can be determined based on the angle α1 between the direction of the magnetic force lines inside the first sub-magnetic ring and the axial direction of the first magnetic ring 500 and the angle α2 between the direction of the magnetic force lines inside the second sub-magnetic ring and the axial direction of the first magnetic ring 500. For larger α1 and / or α2, the second magnetic ring 600 can be set with a wider magnetic ring width, which is conducive to enhancing the interaction force between the two magnetic rings.

[0176] Fig.31 and Fig.32 Another structure of a third magnetic ring 700 coupled to the first magnetic ring 500 and a schematic cross-sectional view in the radial direction thereof are shown. The direction of the magnetic force lines inside the third magnetic ring 700 is along the radial direction of the third magnetic ring 700, or in other words, the direction of the magnetic force lines inside the third magnetic ring 700 is perpendicular to the normal direction of the plane where the third magnetic ring 700 is located.

[0177] In the case where the third magnetic ring 700 and the first magnetic ring 500 generate mutual attraction, the S pole in the third magnetic ring 700 can be arranged close to the N pole of the first sub-magnetic ring, and the N pole of the third magnetic ring 700 can be arranged close to the S pole of the second sub-magnetic ring. Fig.34 As shown, the S pole in the third magnetic ring 700 may be located on the outside of the third magnetic ring 700 , and the N pole in the third magnetic ring 700 may be located on the inside of the third magnetic ring 700 .

[0178] In order to enable the magnetic lines of force between the first magnetic ring 500 and the third magnetic ring 700 to be more used to enhance the interaction force between the two magnetic rings, in some examples, the shape of the first magnetic ring 500 and the shape of the third magnetic ring 700 can match. Specifically, the distance R1 between the center O1 of the first magnetic ring 500 and the center line of the magnetic ring cross section and the distance R3 between the center O3 of the third magnetic ring 700 and the center line of the magnetic ring cross section should be basically equal, or in other words, the difference δ between the aforementioned R1 and R3 should be less than a preset threshold.

[0179] The matching relationship between the shapes of the first magnetic ring 500 and the third magnetic ring 700 can also be understood as: the two cross sections of the first magnetic ring 500 and the third magnetic ring 700 at the same position are axially symmetric about the same straight line, or in other words, the center lines of the two cross sections coincide.

[0180] The schematic diagram of the radial QQ section of the third magnetic ring 700 is as follows: Fig.32As shown, D1 and D3 represent the width of the first magnetic ring 500 and the width of the third magnetic ring 700 respectively. In some examples, D3 ≥ D1. Since the magnetic force lines inside the first sub-magnetic ring and the magnetic force lines inside the second sub-magnetic ring are both inclined, the wider third magnetic ring 700 is conducive to allowing the magnetic force lines emitted by the first magnetic ring 500 to enter more into the third magnetic ring 700, and is also conducive to allowing the magnetic force lines emitted by the third magnetic ring 700 to enter more into the first magnetic ring 500, thereby facilitating the increase of the interaction force between the first magnetic ring 500 and the third magnetic ring 700.

[0181] In some examples, the width of the third magnetic ring 700 can be determined based on the angle α1 between the direction of the magnetic force lines inside the first sub-magnetic ring and the axial direction of the first magnetic ring 500 and the angle α2 between the direction of the magnetic force lines inside the second sub-magnetic ring and the axial direction of the first magnetic ring 500. For larger α1 and / or α2, the third magnetic ring 700 can be set with a wider magnetic ring width, which is conducive to enhancing the interaction force between the two magnetic rings.

[0182] Fig.33 and Fig.34 The structure of another fourth magnetic ring 800 coupled with the first magnetic ring 500 and its radial cross-sectional schematic diagram are shown. The structure of the fourth magnetic ring 800 is similar to that of the first magnetic ring 500.

[0183] The fourth magnetic ring 800 is composed of an eighth sub-magnetic ring 810 and a ninth sub-magnetic ring 820. The eighth sub-magnetic ring 810 is located on the outside of the ninth sub-magnetic ring 820. The inner wall of the eighth sub-magnetic ring 800 can contact the outer wall of the ninth sub-magnetic ring 900. In other words, the inner diameter of the eighth sub-magnetic ring 800 is substantially equal to the outer diameter of the ninth sub-magnetic ring 900.

[0184] Combination Fig.34 In the cross-sectional schematic diagram of the fourth magnetic ring 800, the direction of the magnetic force lines in the eighth sub-magnetic ring 810 is tilted to the normal of the plane where the fourth magnetic ring 800 is located, and the direction of the magnetic force lines in the ninth sub-magnetic ring 820 is tilted to the normal of the plane where the fourth magnetic ring 800 is located. The S pole in the eighth sub-magnetic ring 810 is arranged close to the N pole of the first sub-magnetic ring, the N pole in the ninth sub-magnetic ring 820 is arranged close to the S pole of the second sub-magnetic ring, and the N pole of the eighth sub-magnetic ring 810 is arranged close to the S pole of the ninth sub-magnetic ring 820.

[0185] The structure of the eighth sub-magnetic ring 810 and the structure of the ninth sub-magnetic ring 820 are similar to the structures of the first sub-magnetic ring and the second sub-magnetic ring. For detailed description, please refer to Fig.29 and Fig.30 For the sake of brevity, the relevant contents in are not repeated here.

[0186] In order to enable the magnetic lines of force between the first magnetic ring 500 and the fourth magnetic ring 800 to be more used to enhance the interaction force between the two magnetic rings, in some examples, the shape of the first magnetic ring 500 and the shape of the fourth magnetic ring 800 can match. Specifically, the distance R1 between the center O1 of the first magnetic ring 500 and the center line of the magnetic ring cross section and the distance R4 between the center O4 of the fourth magnetic ring 800 and the center line of the magnetic ring cross section should be basically equal, or in other words, the difference δ between the aforementioned R1 and R4 should be less than a preset threshold.

[0187] The matching relationship between the shapes of the first magnetic ring 500 and the fourth magnetic ring 800 can also be understood as: the two cross sections of the first magnetic ring 500 and the fourth magnetic ring 800 at the same position are axially symmetric about the same straight line, or in other words, the center lines of the two cross sections coincide.

[0188] The schematic diagram of the radial UU cross section of the fourth magnetic ring 800 is as follows: Fig.34 As shown. Since the directions of the magnetic lines of force in the first sub-magnetic ring, the second sub-magnetic ring, the eighth sub-magnetic ring 810 and the ninth sub-magnetic ring 820 are all inclined, in order to improve the interaction force between the first magnetic ring 500 and the fourth magnetic ring 800, the width of the first magnetic ring 500 and the width of the fourth magnetic ring 800 should be as equal as possible, or in other words, D5 and D6 represent the width of the first magnetic ring 500 and the width of the fourth magnetic ring 800 respectively. In some examples, D5=D6. In some examples, |D5-D6|≤τ, where τ≥0. It should be understood that here, the smaller the value of τ, the closer the widths of the two magnetic rings are, and the stronger the interaction force between the two magnetic rings is when the volumes of the two interacting magnetic rings are constant.

[0189] Similar to the aforementioned arrangement of a back plate on the same surface of the two sub-magnets of the first magnet, a back plate may also be provided on the connecting surface on the other side opposite to the working surface of the first sub-magnetic ring and the second sub-magnetic ring in the aforementioned first magnetic ring 500. The back plate may be composed of a material having a magnetic permeability greater than a preset threshold, such as a ferromagnetic material or a soft magnetic material.

[0190] By setting up the backplate structure, on the one hand, the two sub-magnetic rings located inside the same magnetic ring can be relatively fixed, and on the other hand, the magnetic lines of force between the two sub-magnetic rings can be closed via the backplate structure with good magnetic conductivity, which is beneficial to increasing the density of the magnetic lines of force emitted by the first magnetic ring 500, and is beneficial to increasing the interaction force between the first magnetic ring 500 and the second magnetic ring, the third magnetic ring or the fourth magnetic ring.

[0191] The first magnetic ring 500 provided in the embodiment of the present application can be applied to different application scenarios. Fig.35 and Fig.36 Two exemplary application methods of the first magnetic ring 500 are provided. It should be understood that the first magnetic ring 500 can also be applied to Fig.35 and Fig.36 In other scenarios besides the above, for example, magnetic protective covers for electronic devices, magnetic power banks, etc., this application does not impose any restrictions on this.

[0192] like Fig.35 The wireless charging base 2000 provided in an embodiment of the present application is shown. The wireless charging base 2000 may include a cover 2100 and a shell 2200. The cover 2100 may be covered on the shell 2200. The cover 2100 and the shell 2200 may surround and form a receiving space, in which the first connecting ring 2300 and the charging coil 2400 of the wireless charging base 2000 may be received. The first connecting ring 2300 may be any of the first magnetic rings provided above. The charging coil 2400 is arranged inside the area surrounded by the first connecting ring 2300. The charging coil 2400 is also connected to a circuit board in the wireless charging base 2000, and the circuit board is arranged outside the area surrounded by the first connecting ring 2300. In some examples, the first connecting ring 2300 may be provided with a notch, and the interconnection line connecting the charging coil 2400 and the circuit board may be connected from the charging coil 2400 inside the first connecting ring to the circuit board outside the first connecting ring 2300 via the notch.

[0193] The first connection ring 2300 in the wireless charging base 2000 can cooperate with the coupling connection ring installed on the electronic device. There can be mutual magnetic attraction between the first connection ring 230 and the coupling connection ring. When the electronic device is placed on the wireless charging base 2000 (for example, on the cover 2100), the mutual attraction between the first connection ring 2300 and the coupling connection ring on the electronic device can attract the electronic device to the wireless charging base 2000, so that the electronic device is not easy to slide off the wireless charging base 2000 during the wireless charging process, thereby improving the reliability and stability of the wireless charging function of the electronic device.

[0194] like Fig.36 The electronic device 3000 provided in an embodiment of the present application is shown, and a second connecting ring 3100 is provided inside the electronic device 3000, and the second connecting ring 3100 can be attached to a surface of the back cover of the electronic device 3000 facing the inside of the electronic device 3000. The second connecting ring 3100 can be any of the first magnetic rings provided in the above embodiments.

[0195] In some examples, the second connecting ring 3100 can generate mutual attraction with coupling connecting rings in accessories of the electronic device 3000, such as a protective case of the electronic device 3000, a stand of the electronic device 3000, and a charging base. When the electronic device 3000 and one or more of the aforementioned accessories are close to each other, the mutual attraction between the second connecting ring 3100 and the coupling connecting ring can be used to relatively fix the electronic device 3000 and the accessories.

[0196] In some examples, the electronic device 3000 supports a wireless charging function, and a wireless charging coil is also housed inside the electronic device 3000, and the wireless charging coil is electrically connected to the mainboard in the electronic device. The wireless charging coil can be located in the area surrounded by the aforementioned second connecting ring 3100, and the circuit board of the electronic device is located outside the area surrounded by the second connecting ring 3100. The second connecting ring 3100 can have a gap, and the interconnection line between the wireless charging coil and the circuit board can pass through the gap opened by the second connecting ring 3100.

[0197] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0198] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A magnet, characterized in that: include: A plurality of magnet units, wherein the plurality of magnet units are arranged in a ring shape, and the magnet unit comprises a first magnet sub-unit and a second magnet sub-unit, wherein the first magnet sub-unit and the second magnet sub-unit are relatively fixed, a first magnetic pole of the first magnet sub-unit is adjacent to a second magnetic pole of the second magnet sub-unit, the first magnetic pole is opposite to the second magnetic pole, and the first magnetic pole and the second magnetic pole are both arranged close to the same surface of the magnet; The direction of the magnetic force lines inside the first magnet sub-unit is inclined to the plane where the magnet is located, and the direction of the magnetic force lines inside the second magnet sub-unit is inclined to the plane where the magnet is located.

2. The magnet according to claim 1, characterized in that The angle between the direction of the magnetic force lines inside the first magnet subunit and the plane where the magnet is located is α, and the angle between the direction of the magnetic force lines inside the second magnet subunit and the plane where the magnet is located is β. Among them, 30≤α<90°, 30≤β<90°.

3. The magnet according to claim 2, characterized in that α＝β。 4. The magnet according to any one of claims 1 to 3, characterized in that The first magnet subunit includes a first contact surface and a first exposed surface that are opposite to each other, and the second magnet subunit includes a second contact surface and a second exposed surface that are opposite to each other, the first contact surface is adjacent to the second contact surface, the first exposed surface is away from the second contact surface, and the second exposed surface is away from the first contact surface. The distance between the first contact surface and the first exposed surface is equal to the distance between the second contact surface and the second exposed surface.

5. The magnet according to any one of claims 1 to 4, characterized in that The magnet unit is a non-mirror symmetric structure.

6. The magnet according to claim 5, characterized in that The magnet unit includes a connecting wall, two connecting walls of two adjacent magnet units among the plurality of magnet units are adjacent, the connecting wall includes a first connecting wall and a second connecting wall that are oppositely arranged, and a first end of the first connecting wall is provided with a first chamfer.

7. The magnet according to claim 6, characterized in that The second end of the first connecting wall is provided with a second chamfer, or the second end of the second connecting wall is provided with a second chamfer, Wherein, the first end and the second end are two opposite ends of the magnet unit.

8. The magnet according to any one of claims 5 to 7, characterized in that The magnet unit includes a connecting wall, two connecting walls of two adjacent magnet units among the plurality of magnet units are adjacent, the connecting wall includes a first connecting wall and a second connecting wall arranged opposite to each other, and a plane where the first connecting wall is located intersects with a plane where the second connecting wall is located.

9. The magnet according to any one of claims 1 to 8, characterized in that A gap is arranged between at least two adjacent magnet units among the plurality of magnet units.

10. The magnet according to any one of claims 1 to 9, characterized in that The magnet further includes a spacing unit, which is located between two adjacent magnet units. The directions of magnetic lines of force of the spacing unit and the magnet units on the same side of the magnet are different.

11. The magnet according to any one of claims 1 to 10, characterized in that The magnet further includes a back plate, the first magnetic pole and the second magnetic pole are arranged close to a connection surface of the magnet, the back plate is fixedly connected to the connection surface, and the back plate is composed of a material having a magnetic permeability greater than a preset threshold.

12. A magnet, characterized in that: The magnet is annular, and includes a first sub-magnet and a second sub-magnet, both of which are annular, the first sub-magnet is sleeved on the outside of the second sub-magnet, the first sub-magnet and the second sub-magnet are relatively fixed, the first magnetic pole of the first sub-magnet is adjacent to the second magnetic pole of the second sub-magnet, the first magnetic pole is opposite to the second magnetic pole, and the first magnetic pole and the second magnetic pole are both arranged close to the same surface of the magnet; The direction of the magnetic force lines inside the first sub-magnet is inclined to the plane where the magnet is located, and the direction of the magnetic force lines inside the second sub-magnet is inclined to the plane where the magnet is located.

13. The magnet according to claim 12, characterized in that The angle between the direction of the magnetic force lines inside the first sub-magnet and the plane where the magnet is located is α, and the angle between the direction of the magnetic force lines inside the second sub-magnet and the plane where the magnet is located is β. Among them, 30≤α<90°, 30≤β<90°.

14. The magnet according to claim 13, characterized in that α＝β。 15. The magnet according to any one of claims 12 to 14, characterized in that The width of the first sub-magnet is equal to the width of the second sub-magnet.

16. The magnet according to any one of claims 12 to 15, characterized in that The magnet includes at least one notch.

17. The magnet according to any one of claims 12 to 16, characterized in that The magnetic ring is composed of a plurality of first magnetic parts and a plurality of second magnetic parts at intervals, and the directions of magnetic lines of force of the first magnetic parts and the second magnetic parts on the same side of the magnet are different.

18. The magnet according to any one of claims 12 to 17, characterized in that The magnet further includes a back plate, the first magnetic pole and the second magnetic pole are arranged close to a connection surface of the magnet, the back plate is fixedly connected to the connection surface, and the back plate is made of a material having a magnetic permeability greater than a preset threshold.

19. An electronic device, characterized in that: include: A charging coil, a main board and the magnet according to any one of claims 1 to 11 or claims 12 to 18, wherein the charging coil is located in an area enclosed by the magnet, and the charging coil is electrically connected to the main board.

20. A charging device, characterized in that: include: A charging coil, a circuit board and the magnet according to any one of claims 1 to 11 or claims 12 to 18, wherein the charging coil is located in an area enclosed by the magnet, and the charging coil is electrically connected to the circuit board.

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