Magnets, electronic devices, and charging devices

Abstract

The present application provides a magnet, an electronic device, and a charging device. The magnet includes a first sub-magnet and a second sub-magnet. The directions of the magnetic field lines within the first sub-magnet and the second sub-magnet are each inclined toward the plane on which the magnet is located. More magnetic field lines can be concentrated in the space on one side of the magnet, while the magnetic field lines are sparse around the magnet. In this application, the distribution of the magnetic field lines of the magnet is changed, allowing a magnet with a smaller volume to generate a stronger attractive or repulsive force, allowing the magnet to be manufactured using less material and having a smaller adverse effect on surrounding electronic components. The magnet can be incorporated into electronic devices with limited storage space. The magnet has a wide range of application scenarios and helps reduce resources, such as rare earth elements, required for manufacturing magnets.

Description

[Technical Field]

[0001] This application claims priority to Chinese Patent Application No. 202311125661.2, entitled "Magnet, Electronic Device, and Charging Device," filed with the State Intellectual Property Office of China on August 31, 2023, the entire contents of which are incorporated herein by reference.

[0002] Technical Field This application relates to the field of terminal device hardware, and more particularly to magnets, electronic devices, and charging devices. [Background technology]

[0003] With the development and advancement of computer software and hardware technology, more and more functions are being integrated into electronic devices such as mobile phones and tablet computers. Electronic devices have limited storage space, and hundreds of electronic components must be accommodated inside them, with each component taking up less and less space. Multiple electronic components placed in close proximity may affect each other through electromagnetic induction, which is not conducive to the normal operation of the electronic device.

[0004] Magnets are necessary components for realizing functions such as magnetic charging of electronic devices. On the premise of providing a sufficiently strong magnetic attraction, how to control the volume of the magnet and reduce the space occupied by the magnet is a problem worth considering. Summary of the Invention [Means for solving the problem]

[0005] The present application provides a magnet in which the direction of the magnetic field lines inside the magnet is inclined toward the plane in which the magnet is located. The magnetic field lines are denser on the side of the magnet that is used to generate an interaction force with another magnet. A magnet with a smaller volume can provide a stronger magnetic attraction force and has less effect on magnetically sensitive components at the back and sides of the magnet.

[0006] According to a first aspect, a magnet is provided. The magnet includes a plurality of magnet units. The plurality of magnet units are arranged in a ring shape. The magnet unit includes a first magnet subunit and a second magnet subunit. The first magnet subunit and the second magnet subunit are fixed relative to each other. A first magnetic pole of the first magnet subunit is adjacent to a second magnetic pole of the second magnet subunit. The first magnetic pole and the second magnetic pole are opposite. The first magnetic pole and the second magnetic pole are both arranged close to the same face of the magnet. The direction of the magnetic field lines inside the first magnet subunit is inclined toward the plane on which the magnet is located, and the direction of the magnetic field lines inside the second magnet subunit is inclined toward the plane on which the magnet is located.

[0007] In some scenarios, the direction of the magnetic field lines inside a first magnet subunit may be understood as the magnetization direction within the first magnet subunit, and the direction of the magnetic field lines inside a second magnet subunit may be understood as the magnetization direction within the second magnet subunit.

[0008] It should be understood that the direction of the magnetic field lines being inclined toward the plane in which the magnet is located means that the direction of the magnetic field lines is neither perpendicular to the plane in which the magnet is located nor parallel to the plane in which the magnet is located.

[0009] In some scenarios, the direction of the magnetic field lines tilting towards the plane in which the magnet is located may alternatively be understood as the direction of the magnetic field lines tilting towards the normal direction of the plane in which the magnet is located.

[0010] The magnetic field lines inside the first and second magnet subunits are arranged diagonally, and the magnetic poles of the first and second magnet subunits that are close to each other are arranged opposite each other. In this way, more magnetic field lines can be concentrated on the side of the active surface of the magnet. When the active surface of the magnet is used to attract or repel another magnet, the magnet provided in this technical solution can generate a stronger interaction force with the other magnet compared to a magnet whose magnetic field lines are not arranged diagonally. From another perspective, if the generated interaction force is the same, the magnet provided in this technical solution has a smaller volume and occupies less space when housed in an electronic device.

[0011] In addition, in this technical solution, multiple magnet units are included in the magnet in a ring shape. In different application scenarios, the multiple magnet units may have different assembly methods. This technical solution helps to improve the scenario applicability of the magnet provided in this application.

[0012] In relation to the first aspect, in some implementations of the first aspect, the angle between the direction of the magnetic field lines inside the first magnet subunit and the plane on which the magnet is located is α, and the angle between the direction of the magnetic field lines inside the second magnet subunit and the plane on which the magnet is located is β, where 30≦α<90° and 30≦β<90°.

[0013] The first magnet subunit and the second magnet subunit within the tilt angle range provided in this technical solution can generate stronger magnetic field strength on the side of the active surface, and the magnetic field lines are more densely distributed.

[0014] With respect to the first aspect, in some implementations of the first aspect, α=β.

[0015] The first magnet subunit is arranged so that the inclination angle of the magnetic field lines inside the first magnet subunit is the same as the inclination angle of the magnetic field lines inside the second magnet subunit. After the magnetic fields generated by the first magnet subunit and the second magnet subunit are superimposed, the magnetic field lines around the magnet become sparser. When the magnet is installed in an electronic device, the magnet has less adverse effects on surrounding electronic components.

[0016] In relation to the first aspect, in some implementations of the first aspect, the first magnet subunit includes a first contact surface and a first exposed surface arranged oppositely, the second magnet subunit includes a second contact surface and a second exposed surface arranged oppositely, the first contact surface and the second contact surface are adjacently arranged, the first exposed surface is oriented away from the second contact surface, and the second exposed surface is oriented away from the first contact surface, and 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.

[0017] In this technical solution, the relationship between the shapes of the first magnet subunit and the second magnet subunit is further limited to further reduce the distribution density of the magnetic field lines around the magnet and further reduce the adverse effects of the magnet on surrounding electronic components.

[0018] With respect to the first aspect, in some implementations of the first aspect, the magnet unit is a non-mirror symmetric structure.

[0019] In one possible implementation, the magnet units include connecting walls, and two connecting walls of two adjacent magnet units of the plurality of magnet units are adjacent, and the connecting walls include a first connecting wall and a second connecting wall arranged opposite each other, and the first connecting wall and the second connecting wall are not mirror symmetrical.

[0020] In one possible implementation, the magnet unit includes an oppositely arranged working surface and a connecting surface, and the working surface and the connecting surface are not mirror symmetrical.

[0021] In one possible implementation, the magnet unit includes an exposed surface and a contact surface that are oppositely arranged, and the exposed surface and the contact surface are not mirror symmetrical.

[0022] In one possible implementation, the first connecting wall of the magnet unit is coated with a first coating and the second connecting wall is coated with a second coating, the first coating and the second coating being different colors.

[0023] The magnet units are arranged with a non-mirror symmetric structure. In the process of forming a magnet using the magnet units, the installation sequence of the magnet units can be quickly determined based on the shape, which helps to improve the assembly efficiency of the magnet units.

[0024] In relation to the first aspect, in some implementations of the first aspect, the magnet units include connecting walls, and two connecting walls of two adjacent magnet units of the plurality of magnet units are adjacent. The connecting walls include a first connecting wall and a second connecting wall disposed opposite each other, and a first end of the first connecting wall is given a first reversal angle.

[0025] In one possible implementation, the first reversal angle may be a chamfer or a fillet.

[0026] In relation to the first aspect, in some implementations of the first aspect, the second end of the first connecting wall is provided with a second inversion angle, or the second end of the second connecting wall is provided with a second inversion angle. The first end and the second end are two oppositely disposed ends of the magnet unit.

[0027] In one possible implementation, the second reversal angle may be a chamfer or a fillet.

[0028] In this technical solution, the installation sequence of the magnet units is determined based on the reversal angle of the magnet units, which can be easily identified through visual recognition or image recognition, thereby facilitating automatic assembly of the magnet units.

[0029] In relation to the first aspect, in some implementations of the first aspect, the magnet units include connecting walls, where two connecting walls of two adjacent magnet units of the plurality of magnet units are adjacent, and the connecting walls include a first connecting wall and a second connecting wall disposed opposite each other, and a plane in which the first connecting wall is located intersects a plane in which the second connecting wall is located.

[0030] In one possible implementation, this technical solution may be understood as the inclination angle of the plane on which the first connecting wall lies being different from the inclination angle of the plane on which the second connecting wall lies.

[0031] This technical solution provides a magnet unit with another asymmetric structure. Compared with the aspect of providing a reversal angle, this technical solution simplifies the processing process of the magnet unit and helps to obtain a magnet unit structure with a non-mirror symmetric structure, thereby improving the preparation efficiency of the magnet unit.

[0032] With respect to the first aspect, in some implementations of the first aspect, a gap is disposed between at least two adjacent magnet units of the plurality of magnet units.

[0033] In one possible implementation, the magnet can include one or more gaps.

[0034] A gap is provided between the magnet units, and connecting wires between electronic components located inside the area surrounded by the magnets and electronic components located outside the area surrounded by the magnets, etc., can be accommodated in the gap. Implementation of this technical solution is useful for accommodating magnets in electronic devices with limited accommodation space, and is useful for applying magnets to various electronic devices.

[0035] In relation to the first aspect, in some implementations of the first aspect, the magnet further includes a spacing unit located between two adjacent magnet units, the spacing unit having a magnetic field line direction different from the magnetic field line direction of the spacing unit on the same side of the magnet.

[0036] In one possible implementation, the spacing unit and the magnet unit are of the same shape.

[0037] In one 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, the shape of the second spacing subunit is the same as the shape of the second magnet subunit, the gradient of the magnetic field lines inside the first spacing subunit is the same as the gradient of the magnetic field lines inside the second magnet subunit, and the gradient of the magnetic field lines inside the second spacing subunit is the same as the gradient of the magnetic field lines inside the first magnet subunit.

[0038] Between two adjacent magnet units, a spacing unit with different magnetic field line directions is placed. When a magnet is used to perform attraction or repulsion with another magnet, the directions of the magnetic field lines generated by the magnet unit and spacing unit are different, so the type of interaction force between the magnet unit and spacing unit and the other magnet is different. Such magnets, given different structural units, can select the installation angle between the two interacting magnets to some extent.

[0039] In relation to the first aspect, in some implementations of the first aspect, the magnet may further include a backplane, the first magnetic pole and the second magnetic pole may be disposed near a connecting surface of the magnet, the backplane may be fixed to the connecting surface of the magnet, and the backplane may be made of a material having a magnetic permeability greater than a preset threshold.

[0040] In some possible implementations, the connecting surface and the working surface are two oppositely disposed surfaces of a magnet.

[0041] In one possible implementation, the backplane may be made of a ferromagnetic material or a soft magnetic material.

[0042] In this technical solution, a backplane made of ferromagnetic or soft magnetic material is connected to the connecting surface of the magnet. Because the magnet attracts the backplane, the backplane can relatively fix the first and second magnet subunits to a certain extent. Because the backplane is made of ferromagnetic or soft magnetic material, the magnetic field lines on the connecting surface side of the magnet are preferentially closed by using a backplane with lower magnetic resistance. Therefore, placing the backplane also serves to weaken the external magnetic field on the connecting surface side of the magnet to some extent, strengthen the magnetic field on the working surface, and increase the magnetic attraction force.

[0043] According to a second aspect, a magnet is provided. The magnet is ring-shaped. The magnet includes a ring-shaped first sub-magnet and a second sub-magnet. The first sub-magnet is provided around the second sub-magnet in a sleeve-like manner. The first sub-magnet and the second sub-magnet are fixed relative to each other. 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. The first magnetic pole and the second magnetic pole are both positioned close to the same face of the magnet. The direction of the magnetic field lines inside the first sub-magnet is inclined toward the plane on which the magnet is located, and the direction of the magnetic field lines inside the second sub-magnet is inclined toward the plane on which the magnet is located.

[0044] In some scenarios, the direction of the magnetic field lines inside a first sub-magnet may be understood as the magnetization direction within the first sub-magnet, and the direction of the magnetic field lines inside a second sub-magnet may be understood as the magnetization direction within the second sub-magnet.

[0045] It should be understood that the direction of the magnetic field lines being inclined toward the plane in which the magnet is located means that the direction of the magnetic field lines is neither perpendicular to the plane in which the magnet is located nor parallel to the plane in which the magnet is located.

[0046] In some scenarios, the direction of the magnetic field lines tilting towards the plane in which the magnet is located may alternatively be understood as the direction of the magnetic field lines tilting towards the normal direction of the plane in which the magnet is located.

[0047] The magnetic field lines inside the first and second sub-magnets are arranged diagonally, and the magnetic poles of the first and second sub-magnets that are arranged close to each other are arranged opposite each other. In this way, more magnetic field lines can be concentrated on the side of the active surface of the magnet. When the active surface of the magnet is used to attract or repel another magnet, the magnet provided in this technical solution can generate a stronger interaction force with the other magnet compared to a magnet whose magnetic field lines are not arranged diagonally. From another perspective, if the generated interaction force is the same, the magnet provided in this technical solution has a smaller volume and occupies less space when housed in an electronic device.

[0048] In relation to the second aspect, in some implementations of the second aspect, the included angle between the direction of the magnetic field lines inside the first sub-magnet and the plane in which the magnet is located is α, and the included angle between the direction of the magnetic field lines inside the second sub-magnet and the plane in which the magnet is located is β, where 30≦α<90° and 30≦β<90°.

[0049] The first sub-magnet and the second sub-magnet within the tilt angle range provided in this technical solution can generate a stronger magnetic field strength on the side of the active surface, and the magnetic field lines are more densely distributed.

[0050] With respect to the second aspect, in some implementations of the second aspect, α=β.

[0051] The first sub-magnet is arranged so that the angle of inclination of the magnetic field lines inside it is the same as the angle of inclination of the magnetic field lines inside it. After the magnetic fields generated by the first sub-magnet and the second sub-magnet are superimposed, the magnetic field lines around the magnet become sparser. When the magnet is installed in an electronic device, the magnet has less adverse effects on surrounding electronic components.

[0052] With respect to the second aspect, in some implementations of the second aspect, the width of the first sub-magnet is equal to the width of the second sub-magnet.

[0053] In some scenarios, the width of a first sub-magnet being equal to the width of a second sub-magnet may be understood as the difference between the outer and inner diameters of the first sub-magnet being equal to the difference between the outer and inner diameters of the second sub-magnet.

[0054] In this technical solution, the relationship between the shapes of the first sub-magnet and the second sub-magnet is further limited to further reduce the distribution density of the magnetic field lines around the magnet and further reduce the negative impact of the magnet on surrounding electronic components.

[0055] With reference to the second aspect, in some implementations of the second aspect, the magnet includes at least one notch.

[0056] The notch is arranged in the ring-shaped magnet, so that a connecting wire or the like between an electronic component located inside the area surrounded by the magnet and an electronic component located outside the area surrounded by the magnet can be accommodated in the gap. The implementation of this technical solution is useful for accommodating magnets in electronic devices with limited accommodation space, and is useful for applying the magnet to various electronic devices.

[0057] In relation to the second aspect, in some implementations of the second aspect, the magnet includes a plurality of spaced-apart first magnetic portions and a plurality of second magnetic portions, and the magnetic field line direction of the first magnetic portions and the magnetic field line direction of the second magnetic portions on the same side of the magnet are different.

[0058] The first and second magnetic portions are arranged alternately, and the magnetic field lines of the first and second magnetic portions on the same side of the magnet are arranged in different directions, so that the same combined magnet generates an attractive force with the first magnetic portion and a repulsive force with the second magnetic portion. In this way, the two different magnetic portions arranged alternately can select the angle for the interaction between the two magnets when the combined magnet interacts with another magnet.

[0059] In relation to the second aspect, in some implementations of the second aspect, the magnet further includes a backplane, the first magnetic pole and the second magnetic pole may be disposed near a connecting surface of the magnet, the backplane may be fixed to the connecting surface of the magnet, and the backplane is made of a material having a magnetic permeability greater than a preset threshold.

[0060] In some possible implementations, the connecting surface and the working surface are two oppositely disposed surfaces of a magnet.

[0061] In one possible implementation, the backplane may be made of a ferromagnetic material or a soft magnetic material.

[0062] In this technical solution, a backplane made of a ferromagnetic or soft magnetic material is connected to the connecting surface of the magnet. The backplane can fix the first and second sub-magnets relative to each other to some extent. Because the backplane is made of a material with a certain magnetic permeability, the magnetic field lines on the connecting surface side of the magnet are preferentially closed by using a backplane with a lower magnetic reluctance. Therefore, placing the backplane also helps to some extent to increase the density of the magnetic field lines or the strength of the magnetic field on the connecting surface side of the magnet.

[0063] According to a third aspect, there is provided an electronic device including a charging coil, a main board, and a magnet according to any one of the first aspect or the second aspect and possible implementations of the first aspect or the second aspect, wherein the charging coil is located within an area surrounded by the magnet, and the charging coil is electrically connected to the main board.

[0064] According to a fourth aspect, there is provided a charging device including a charging coil, a circuit board, and a magnet according to any one of the first aspect or the second aspect and possible implementations of the first aspect or the second aspect, wherein the charging coil is located within an area surrounded by the magnet, and the charging coil is electrically connected to the circuit board.

[0065] In one possible implementation, the charging device further includes a cover and a housing, the cover covering the housing, and the charging coil, the circuit board, and the magnet are housed within the housing.

[0066] According to a fifth aspect, there is provided a magnetic bracket including a magnet according to the first aspect or the second aspect and any one of the possible implementations of the first aspect or the second aspect.

[0067] According to a sixth aspect, there is provided a housing including a magnet according to the first aspect or the second aspect and any one of the possible implementations of the first aspect or the second aspect. [Brief explanation of the drawings]

[0068] [Figure 1] This is one of the diagrams showing the magnetic field line distribution of two strip magnets arranged in different shapes. [Figure 2] This is one of the diagrams showing the magnetic field line distribution of two strip magnets arranged in different shapes. [Figure 3] This is one of the diagrams showing the magnetic field line distribution of two strip magnets arranged in different shapes. [Figure 4] This is one of the diagrams showing the magnetic field line distribution of two strip magnets arranged in different shapes.

[0069] [Figure 5] FIG. 2 is a diagram of a first magnet according to an embodiment of the present application.

[0070] [Figure 6] FIG. 6 is a cross-sectional view of the first magnet taken along line AA in FIG. 5.

[0071] [Figure 7] FIG. 6 is a diagram showing the distribution of magnetic field lines around the first magnet of FIG. 5.

[0072] [Figure 8] 1 is a diagram showing two possible shapes of the first magnet. [Figure 9] 1 is a diagram showing two possible shapes of the first magnet.

[0073] [Figure 10] FIG. 1 shows a composite magnet obtained by assembling the first magnets as a structural unit. [Figure 11] FIG. 1 shows a composite magnet obtained by assembling the first magnets as a structural unit. [Figure 12] FIG. 1 shows a composite magnet obtained by assembling the first magnets as a structural unit. [Figure 13] FIG. 1 shows a composite magnet obtained by assembling the first magnets as a structural unit. [Figure 14] FIG. 1 shows a composite magnet obtained by assembling the first magnets as a structural unit. [Figure 15] FIG. 1 shows a composite magnet obtained by assembling the first magnets as a structural unit. [Figure 16] FIG. 1 shows a composite magnet obtained by assembling the first magnets as a structural unit. [Figure 17] FIG. 1 shows a composite magnet obtained by assembling the first magnets as a structural unit.

[0074] [Figure 18] 10 is a diagram showing the first magnet in two other possible shapes. [Figure 19] 10 is a diagram showing the first magnet in two other possible shapes.

[0075] [Figure 20] FIG. 19 shows a composite magnet obtained by assembling the first magnets of FIG. 18 as a structural unit.

[0076] [Figure 21] FIG. 20 shows a composite magnet obtained by assembling the first magnets of FIG. 19 as a structural unit.

[0077] [Figure 22] 10 shows yet another possible shape of the first magnet.

[0078] [Figure 23] FIG. 23 shows a composite magnet obtained by assembling the first magnets of FIG. 22 as a structural unit.

[0079] [Figure 24] FIG. 10 is a diagram showing a ring-shaped first magnet. [Figure 25] FIG. 10 is a diagram showing a ring-shaped first magnet. [Figure 26] FIG. 10 is a diagram showing a ring-shaped first magnet. [Figure 27] FIG. 10 is a diagram showing a ring-shaped first magnet.

[0080] [Figure 28] FIG. 1 is a diagram of a first magnet with a backplane.

[0081] [Figure 29] 1 is a diagram of a magnet ring pair according to an embodiment of the present application.

[0082] [Figure 30] FIG. 30 is a radial cross-sectional view of the magnet ring pair of FIG. 29.

[0083] [Figure 31] FIG. 10 is a diagram of another magnet ring pair according to an embodiment of the present application.

[0084] [Figure 32] FIG. 32 is a radial cross-sectional view of the magnet ring pair of FIG. 31.

[0085] [Figure 33] FIG. 10 is a diagram of yet another magnet ring pair according to an embodiment of the present application.

[0086] [Figure 34] FIG. 34 is a radial cross-sectional view of the magnet ring pair of FIG. 33.

[0087] [Figure 35] FIG. 1 is a diagram of a wireless charging cradle including a first magnet according to an embodiment of the present application.

[0088] [Figure 36] 1 is a diagram of an electronic device including a first magnet according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0089] The following describes the embodiments of the present application in detail. Examples of the embodiments of the present application are shown in the accompanying drawings. In the accompanying drawings, the same or similar reference numerals indicate the same or similar elements, or elements having the same or similar functions. The following embodiments described with reference to the accompanying drawings are examples and are merely used to explain the present application, but cannot be understood as limitations on the present application.

[0090] Unless otherwise defined, technical or scientific terms used herein should have the common meaning as understood by a person skilled in the art of this application. In the description of this application, the directions or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "upper," "lower," "inner," or "outer" are directions or positional relationships shown based on the accompanying drawings, and are used merely to facilitate and simplify the description of this application, and are not intended to indicate or imply that the devices or elements shown need to have a particular orientation or be constructed or operated in a particular direction, and therefore cannot be construed as limitations on this application.

[0091] Figures 1-4 show several magnetic field distributions after combining two strip magnets. Figure 1 shows the magnetic field distribution when the opposite polarities of the two strip magnets are facing each other. Figure 2 shows the magnetic field distribution when the same polarities of the two strip magnets are facing each other. Figure 3 shows the magnetic field distribution when the opposite polarities of the two strip magnets are parallel. Figure 4 shows the magnetic field distribution when the same polarities of the two strip magnets are parallel. From these figures, we can see that the two magnets are surrounded by magnetic field lines. When these magnets are used in electronic devices, the magnetic field around the magnets adversely affects the normal operation of electronic components at various positions around the magnets. In addition, because the magnetic field generated by the magnets is dispersed, the magnetic field lines in the magnet's main direction of action are not sufficiently concentrated, limiting the magnet's performance.

[0092] To improve the distribution of the magnetic field generated by a magnet, reduce the adverse effects of the magnetic field on the operation of surrounding electronic components, and improve the performance of the magnet, the present application provides a first magnet 10. The direction of the magnetic field lines inside the magnet is inclined relative to the normal direction of the plane on which the magnet is located. More magnetic field lines may be concentrated in the space above or below the plane on which the magnet is located. In the same case, the interaction force generated between the magnet and another magnet is greater.

[0093] Fig. 5 is a diagram showing the structure of the first magnet 10A. Fig. 6 is an AA cross-sectional view of the first magnet 10A. Fig. 7 is a diagram showing the distribution of magnetic field lines around the first magnet 10A.

[0094] The first magnet 10A includes a first sub-magnet 110 and a second sub-magnet 120, which are arranged adjacent to each other. The direction of the magnetic field lines inside the first sub-magnet 110 is inclined toward the normal direction of the plane on which the first magnet 10A is located (the OO direction in FIG. 6). In other words, the included angle between the direction of the magnetic field lines inside the first sub-magnet 110 and the normal direction of the plane on which the first magnet 10A is located is γ1, and 0<γ1<90°.

[0095] The above description regarding the direction of the magnetic field lines inside the first sub-magnet 110 can also be understood as the magnetization direction on the AA cross section of the first sub-magnet 110 being at an acute angle to the plane in which the first magnet 10A is located, or the magnetization direction on the AA cross section of the first sub-magnet 110 forming an included angle of (90°-γ1) with the plane in which the first magnet 10A is located, with 0<γ1<90°.

[0096] The direction of the magnetic field lines inside the second sub-magnet 120 is inclined toward the normal direction of the plane on which the first magnet 10A is located (the OO direction in FIG. 6). In other words, the angle between the direction of the magnetic field lines inside the second sub-magnet 120 and the normal direction of the plane on which the first magnet 10A is located is γ2, where 0<γ2<90°.

[0097] The above description regarding the direction of the magnetic field lines within the second sub-magnet 120 can also be understood as the magnetization direction on the AA cross section of the second sub-magnet 120 being at an acute angle to the plane in which the first magnet 10 is located, or the magnetization direction on the AA cross section of the second sub-magnet 120 being at an included angle of (90°-γ2) with the plane in which the first magnet 10 is located, with 0<γ2<90°.

[0098] 7, the magnetic field lines around the first magnet 10A are mainly concentrated in the space above the top surface of the first magnet 10A, which may also be referred to as the active surface of the first magnet 10A. In some examples, the N and S polarities in adjacent regions of the first sub-magnet 110 and the second sub-magnet 120 on the active surface (also referred to as the attractive surface or repulsive surface) of the first magnet 10A are opposite. That is, in FIG. 5, the N or S polarity in the A1 region of the first sub-magnet 110 is opposite to the N or S polarity in 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 adjacently arranged and are located close to the same surface of the first magnet 10A.

[0099] In some examples, the top left corner of the first sub-magnet 110 is represented as a north pole attribute and the bottom right corner of the first sub-magnet 110 is represented as a south pole attribute.

[0100] In some examples, the top right corner of the second sub-magnet 120 is represented as a south pole attribute and the bottom left corner of the second sub-magnet 120 is represented as a north pole attribute.

[0101] In order to improve the spatial distribution of the magnetic field lines of the first magnet 10A, distributing fewer magnetic field lines around the first magnet 10A and distributing more magnetic field lines in the space above and / or below the first magnet 10A, in some examples the included angle γ1 is equal to the included angle γ2.

[0102] In some examples, the included angle between the direction of the magnetic field lines in the first sub-magnet 110 and the direction of the magnetic field lines in the second sub-magnet 120 is 180°-(γ1+γ2). For example, the direction of the magnetic field lines in the first sub-magnet 110 points toward the active surface, and the direction of the magnetic field lines in the second sub-magnet 120 points toward another surface opposite the active surface.

[0103] Similarly, the shape and size of the first sub-magnet 110 may essentially match the shape and size of the second sub-magnet 120 to improve the spatial distribution of the magnetic field lines of the first magnet 10A.

[0104] In some examples, the length of the first sub-magnet 110 may be equal to the length of the second sub-magnet 120, i.e., the first sub-magnet 110 and the second sub-magnet 120 have equal sizes in the X-axis direction in FIG. 5.

[0105] In some examples, the width of the first sub-magnet 110 may be equal to the width of the second sub-magnet 120, i.e., the first sub-magnet 110 and the second sub-magnet 120 have equal sizes in the Y-axis direction in FIG. 5.

[0106] In some examples, the height of the first sub-magnet 110 may be equal to the height of the second sub-magnet 120, i.e., the first sub-magnet 110 and the second sub-magnet 120 have equal sizes in the Z-axis direction in FIG. 5.

[0107] Because the shape and size of the first sub-magnet 110 basically match those of the second sub-magnet 120, the overlap of the magnetic field lines generated by the first sub-magnet 110 and the second sub-magnet 120 makes the distribution of the magnetic field lines around the first magnet 10A sparser and the distribution of the magnetic field lines in the space above and / or below the first magnet 10A denser. In this way, when the active surface of the first magnet 10A is used to interact with another magnet, the interaction force generated between the first magnet 10A and the other magnet is stronger, and the first magnet 10A has a smaller adverse effect on the normal operation of surrounding electronic components.

[0108] From another perspective, in the above solution, the direction of the magnetic field lines inside the first magnet 10A is changed, i.e., the magnetization direction inside the first magnet 10A is changed, so that more magnetic field lines can be concentrated in the space corresponding to the active surface of the first magnet 10A, and the first magnet 10A having less material and a smaller volume can generate a magnetic field line distribution similar to that generated by a magnet having more material and a larger volume, thereby reducing the space occupied by the first magnet and reducing the material cost of the first magnet.

[0109] In different application scenarios, the first magnet may further have other different shapes. Correspondingly, the first sub-magnet 110 and the second sub-magnet 120 included in the first magnet may also have different shapes. Figures 8 and 9 are top views of first magnets with two different shapes as examples.

[0110] 8, the first magnet 10B may have a truncated pyramidal shape, and the first sub-magnet 110 and the second sub-magnet 120 are also truncated pyramidal shapes, and the first sub-magnet 110 and the second sub-magnet 120 together form the first magnet 10B. The cross section shown in FIG. 6 can be considered as the BB cross section of the isosceles trapezoid in FIG.

[0111] 8, the isosceles trapezoid on the left is the first submagnet 110, and the isosceles trapezoid on the right is the second submagnet 120. The first submagnet 110 is connected to the second submagnet 120. The contact surface between the first submagnet 110 and the second submagnet 120 is referred to as the first contact surface, and the contact surface between the second submagnet 120 and the first submagnet 110 is referred to as the second contact surface. In some examples, the shapes and sizes of the first contact surface and the second contact surface are consistent.

[0112] An outer surface of the first submagnet 110 adjacent to the first contact surface may be referred to as a sidewall of the first submagnet 110, another outer surface of the first submagnet 110 opposite the first contact surface may be referred to as a first exposed surface of the first submagnet 110, and the first contact surface and first exposed surface may be considered as the upper and lower surfaces, respectively, of the first submagnet 110. Similarly, an outer surface of the second submagnet 120 adjacent to the second contact surface may be referred to as a sidewall of the second submagnet 120, another outer surface of the second submagnet 120 opposite the second contact surface may be referred to as a second exposed surface of the second submagnet 120, and the second exposed surface and second contact surface may be considered as the upper and lower surfaces, respectively, of the second submagnet 120.

[0113] In some examples, the two included angles between the first contact surface of the first submagnet 110 and the plane on which the sidewalls are located are equal to the two included angles between the second contact surface of the second submagnet 120 and the plane on which the sidewalls are located. In other words, the sidewalls of the first submagnet 110 and the second submagnet 120 smoothly transition at the position where the sidewalls of the first submagnet 110 and the second submagnet 120 are connected.

[0114] 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.

[0115] In some examples, the shapes of the first sub-magnet 110 and the second sub-magnet 120 may be essentially consistent. For example, the width of the first sub-magnet 110 may be equal to the width of the second sub-magnet 120. That is, in FIG. 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.

[0116] As shown in Fig. 9, the first magnet 10C may have an axially symmetric (line-symmetric) sector ring shape, and the first sub-magnet 110 and the second sub-magnet 120 are also axially symmetric sector rings, and the first sub-magnet 110 and the second sub-magnet 120 together form the first magnet 10C. The cross section shown in Fig. 6 may be a CC cross section of the sector ring in Fig. 9.

[0117] 9, the sector ring on the left side can be considered the first sub-magnet 110, and the sector ring on the right side can be considered the second sub-magnet 120. The first sub-magnet 110 is connected to the second sub-magnet 120. The contact surface between the first sub-magnet 110 and the second sub-magnet 120 may be referred to as the first contact surface, and the contact surface between the second sub-magnet 120 and the first sub-magnet 110 may be referred to as the second contact surface.

[0118] In some examples, the shapes and sizes of the first and second contact surfaces are consistent. That is, the sector ring-shaped first sub-magnet 110 is located outside the sector ring-shaped second sub-magnet 120. The warped surface of the first sub-magnet 110 closer to the second sub-magnet 120 may be referred to as the first inner wall, and the warped surface of the first sub-magnet 110 farther from the second sub-magnet 120 may be referred to as the first outer wall. The warped surface of the second sub-magnet 120 closer to the first sub-magnet 110 may be referred to as the second outer wall, and the warped surface of the second sub-magnet 120 farther from the first sub-magnet 110 may be referred to as the second inner wall. The shapes and sizes of the first inner wall and the second outer wall are equal.

[0119] In some examples, the shapes of the first sub-magnet 110 and the second sub-magnet 120 may be essentially consistent. For example, the width of the first sub-magnet 110 is equal to the width of the second sub-magnet 120. That is, in FIG. 9 , the difference between the outer and inner diameters of the sector ring corresponding to the first sub-magnet 110 is equal to the difference between the outer and inner diameters of the sector ring corresponding to the second sub-magnet 120.

[0120] In some examples, a rectangular parallelepiped-shaped first magnet 10A shown in FIG. 5, a truncated pyramidal-shaped first magnet 10B shown in FIG. 8, and a fan-ring-shaped first magnet 10C shown in FIG. 9 are used as structural units for joining to obtain different joining shapes.

[0121] 10 and 11, a rectangular parallelepiped-shaped first magnet 10A may be used as a structural unit and joined to form a strip-shaped first magnet group 200 or a polygon-shaped second magnet group 310. If the length of the rectangular parallelepiped is short, the polygon-shaped second magnet group 310 shown in FIG. 11 may be roughly ring-shaped.

[0122] In some examples, the plurality of first magnets 10A may be joined in a non-closed ring shape, i.e., a notch may be disposed in the generally ring-shaped second magnet group 310 shown in Figure 11. For example, the non-closed ring may be axially symmetric in shape.

[0123] In some examples, the multiple first magnets 10A may be distributed discontinuously and axially symmetrically to form a magnet group, and the magnet group may include an even number or an odd number of the first magnets 10A.

[0124] As shown in Fig. 12, a truncated pyramidal first magnet 10B may be used as a structural unit and joined to form a polygonal third magnet group 320. When the size of the isosceles trapezoid is small, the polygonal third magnet group 320 shown in Fig. 12 will be roughly ring-shaped.

[0125] In some examples, the plurality of first magnets 10B may be joined in a non-closed ring shape, i.e., a notch may be disposed in the generally ring-shaped third magnet group 320 shown in Figure 12. For example, the non-closed ring may be axially symmetric in shape.

[0126] In some examples, the multiple first magnets 10B may be non-continuously and axially symmetrically distributed to form a magnet group, and the magnet group may include an even number or an odd number of the first magnets 10B.

[0127] As shown in FIG. 13, a sector ring-shaped first magnet 10C may be used as a structural unit and joined into a ring-shaped fourth magnet group 330.

[0128] In some examples, the plurality of first magnets 10C may be joined in a non-closed ring shape, i.e., the fifth magnet group 331 shown in Figure 14. For example, the fifth magnet group 331 may be axisymmetric about the axis of symmetry WW.

[0129] In some examples, the plurality of first magnets 10C may be non-continuously and axially symmetrically distributed to form a sixth magnet group 332 shown in FIG. 15. The sixth magnet group 332 may include an even or odd number of first magnets 10C, and the plurality of first magnets 10C may be axially symmetrically distributed about the axis of symmetry WW. Similarly, for example, the plurality of first magnets 10C may be centrosymmetrically distributed with respect to, for example, the center point of symmetry C in FIG. 15.

[0130] The ring-shaped compound magnets in Figures 11-13 are assembled using the same type of first magnet, so the distribution of magnetic field lines at all positions on the ring is essentially consistent. In some examples, first magnets of the same shape but different characteristics may be used as structural units and assembled to form rings with different magnetic field line distribution states at different positions on the ring surface. Figures 16 and 17 provide two examples.

[0131] 16 and 17 includes two structural units with the same shape but different properties, namely, a first structural unit 21 and a second structural unit 22. The first structural unit 21 and the second structural unit 22 have the same shape as the sector ring-shaped first magnet 10C.

[0132] The first structural unit 21 includes a first structural subunit and a second structural subunit. The first structural subunit is located outside the second structural subunit, and both the first structural subunit and the second structural subunit are generally sector-shaped. The shape and direction of the internal magnetic field lines of the first structural subunit are consistent with the shape and direction of the internal magnetic field lines of the first submagnet 110 in FIG. 9, and the shape and direction of the internal magnetic field lines of the second structural subunit are consistent with the shape and direction of the internal magnetic field lines of the second submagnet 120 in FIG. 9. For a related description of the first structural subunit and the second structural subunit, please refer to the relevant content in FIG. 9. For the sake of brevity, the details will not be described again here.

[0133] The second structural unit 22 includes a third structural subunit and a fourth structural subunit. The third structural subunit is located outside the fourth structural subunit, and both the third structural subunit and the fourth structural subunit are generally sector ring-shaped. The shape of the third structural subunit matches the shape of the first submagnet 110 in FIG. 9 , and the direction of the magnetic field lines inside the third structural subunit matches the direction of the magnetic field lines inside the second submagnet 120 in FIG. 9 . The shape of the fourth structural subunit matches the shape of the second submagnet 120 in FIG. 9 , and the direction of the magnetic field lines inside the fourth structural subunit matches the direction of the magnetic field lines inside the first submagnet 110 in FIG. 9 . For a related description of the third structural subunit and the fourth structural subunit, please refer to the relevant content in FIG. 9 . For the sake of brevity, the details will not be described again here.

[0134] In Fig. 16, the first structural units 21 and the second structural units 22 are alternately arranged to form a seventh magnet group 334. In Fig. 17, the compound magnet ring is assembled in an arrangement in which two first structural units 21 are spaced apart by two second structural units 22 to form an eighth magnet group 335. In some examples, the direction of the magnetic field lines in the upper space above the active surface of the first structural unit 21 faces the first direction, and the magnetic direction in the upper space above the active surface of the second structural unit 22 faces away from the first direction.

[0135] In the ring-shaped magnet group structure formed by the assembly and arrangement manner shown in Figure 16 or 17, the magnetic field lines of different directions are distributed alternately on the ring surface of the magnet ring. This magnet group and another ring-shaped magnet are used to repel or attract each other, and the first structural unit 21 and the other magnet exhibit an attractive force, while the second structural unit 22 and the same magnet exhibit a repulsive force. When the composite magnet ring interacts with the other magnet, the two structural units with opposite magnetic field line directions can select the angle at which the two magnets fit together to some extent.

[0136] Because the magnetic poles corresponding to the two opposing sides or faces of a first magnet are different, the magnetic poles or installation order of the first magnets cannot be accurately determined based solely on the shape of the first magnets during the process of joining and assembling multiple first magnets, such as for mirror-symmetric first magnets, such as rectangular parallelepipeds, truncated pyramids, or mirror-symmetric fan rings. This results in low assembly efficiency. To improve the efficiency of joining and assembling first magnets, first magnets with non-mirror-symmetric shapes may be assembled as a structural unit. Figures 18, 19, and 22 are partial views showing, as examples, several first magnets with non-mirror-symmetric shapes.

[0137] In some examples, fillets or chamfers may be separately placed on different portions of the two sub-magnets of the sector ring-shaped first magnet 10C, and the joining order of the first magnet 10C may be determined based on the position of the reversal angle.

[0138] 18 is a diagram showing the first magnet 10D. A first inverted angle 31 may be located 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 inverted angle 32 may be located 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 inverted angle 31 and the second inverted angle 32 may be located on the side wall on the same side of the first magnet 10D.

[0139] 19 is a diagram showing the first magnet 10E. A third inverted angle 33 is located 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 inverted angle 34 is located 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 inverted angle 33 and the fourth inverted angle 34 may be located on the side walls on different sides of the first magnet 10E.

[0140] The actual assembly process follows the joining and assembly rule that the inverted corners of two adjacent first magnets do not come into contact, i.e., the "inverted corners" and "non-inverted corners" are spaced apart from each other. Therefore, the efficiency of joining and assembling multiple first magnets can be greatly improved.

[0141] Figure 20 shows a ninth magnet group 340 having a generally ring shape formed by joining and assembling the first magnets 10D in Figure 18. Figure 21 shows a tenth magnet group 350 having a generally ring shape formed by joining and assembling the first magnets 10E in Figure 19. The first sub-magnet rings located on the outside of the ninth magnet group 340 and the tenth magnet group 350 are obtained by joining the first sub-magnets 110 located on the first magnets 10D or the first magnet 10E, and the second sub-magnet rings located on the inside of the magnet groups are obtained by joining the second sub-magnets 120 located on the first magnets 10D or the first magnet 10E.

[0142] In some examples, two side walls of the first magnet may be arranged with different inclination angles, so that the installation order of the first magnets can be determined based on the different side walls.

[0143] As shown in FIG. 22 , the connecting line between the midpoints of the two sidewalls of the first magnet 10F is used as a reference line. The included angle formed between the first sidewall of the first magnet 10F and the reference line is θ1. The included angle formed between the second sidewall of the first magnet 10F and the reference line is θ2. The included angles θ1 and θ2 may reflect the inclination of the first sidewall and the second sidewall, respectively. During the manufacturing process of the first magnet 10F, the difference between the two included angles may be appropriately increased to increase the difference between the inclination of the first sidewall and the inclination of the second sidewall. This reduces the probability of the first magnets 10F being installed in the wrong order and improves the efficiency of joining and assembling multiple first magnets 10F.

[0144] It should be understood that the difference in the inclination of the first and second side walls may alternatively be described by using another reference line or plane, for example, a central plane determined using the center line of the lower bottom surface of the first magnet 10F is used as the reference plane, and the included angle between the first side wall and the reference plane and the included angle between the second side wall and the reference plane are separately observed to determine the inclination of the first and second side walls.

[0145] In the actual assembly process, the multiple first magnets 10F are joined together so that the two side walls of two adjacent magnets with different inclinations are pressed against each other to obtain the roughly ring-shaped eleventh magnet group 360 shown in FIG. 23.

[0146] The above merely lists some first magnets with asymmetric structures as examples. It should be understood that the first magnet may alternatively have many other asymmetric structures. For example, the working surface and connecting surface of the first magnet are two asymmetric surfaces, an inverted angle is disposed at the junction between the exposed surface and working surface of the first magnet, an inverted angle is disposed at the junction between the contact surface and connecting surface of the first magnet, and the left and right walls of the first magnet are coated with coatings of different colors. This is not a limitation of the present application.

[0147] In the eleventh magnet group 360 shown in FIG. 23, the first sub-magnets 110 in the first magnet 10F are connected to each other to form a first sub-magnet ring on the outside of the compound magnet, and the second sub-magnets 120 in the first magnet 10F are connected to each other to form a second sub-magnet ring on the inside of the compound magnet.

[0148] 24, in some examples, the first magnet 10G may be ring-shaped. The first sub-magnet 110 and the second sub-magnet 120 included in the first magnet 10G may also be ring-shaped. The first sub-magnet 110 is located outside the second sub-magnet 120, and the inner radius of the first sub-magnet 110 is equal to the outer radius of the second sub-magnet 120.

[0149] In some examples, the shapes of the first sub-magnet 110 and the second sub-magnet 120 may be essentially consistent. For example, the width of the ring-shaped first sub-magnet 110 is equal to the width of the ring-shaped second sub-magnet 120. The cross section shown in Figure 6 may be a G-G cross section of the ring-shaped first magnet of Figure 24 in the direction of the ring diameter.

[0150] In some examples, the ring-shaped first magnet 10G may include a plurality of spaced-apart first magnetic portions and a plurality of second magnetic portions, and the magnetic field lines of the first magnetic portions and the second magnetic portions on one side of the first magnet 10G are in opposite directions. The structure of the first magnetic portions may be similar to that of the first structural unit 21 shown in FIG. 16 or 17, and the structure of the second magnetic portions may be similar to that of the second structural unit 22 shown in FIG. 16 or 17. For brevity, the details will not be described again here.

[0151] The magnetic field lines of different directions on the ring surface of the magnet ring are distributed alternately. A ring-shaped first magnet 10G and another ring-shaped magnet are used to repel or attract each other, and the first magnetic part and the other magnet exhibit an attractive force, while the second magnetic part and the same magnet exhibit a repulsive force. When the combined magnet ring interacts with the other magnet, the two magnetic parts with opposite magnetic field line directions can select an angle for interaction.

[0152] The ring-shaped first magnet 10G may have one or more notches. For example, as shown in FIG. 25, the ring-shaped first magnet 10G has a first notch 41. As shown in FIG. 26, the ring-shaped first magnet 10G may have two axisymmetrically distributed notches, namely, a second notch 42 and a third notch 43. That is, the ring-shaped first magnet 10G may include two axisymmetrically distributed sector rings. As shown in FIG. 27, the ring-shaped first magnet 10G may have three centrosymmetrically distributed notches, namely, a fourth notch 44, a fifth notch 45, and a sixth notch 46. That is, the ring-shaped first magnet 10G may include three centrosymmetrically distributed sector rings.

[0153] The ring-shaped first magnet 10G may be fabricated according to a one-piece molding process. One or more notches provided in the first magnet 10G may be configured to connect an interior region surrounded by the ring-shaped first magnet 10G to an exterior region. For example, the one or more notches may be configured to accommodate wires or the like connecting electronic components located in the interior region of the first magnet 10G to electronic components outside the first magnet 10G.

[0154] As shown in FIG. 28, the backplane 30 may be placed within various types of the aforementioned first magnets, and the backplane 30 may be configured to fix the first sub-magnet 110 and the second sub-magnet 120 within the first magnet relative to each other.

[0155] In some examples, the backplane 30 may be placed on the surface of the first magnet with sparse magnetic field lines. In other words, the surface of the first magnet with sparse magnetic field lines may be fixed to the backplane 30. In this case, the positions of the first sub-magnet 110 and the second sub-magnet 120 that form the first magnet are also fixed relative to each other.

[0156] The shape of the backplane 30 may be determined based on the shape of the first magnet. In some examples, the first magnet may be ring-shaped, or multiple first magnets may form a ring shape, a polygonal shape, etc. The width of the ring-shaped backplane 30 should be slightly larger than the width of the first magnet, so that the projection of the first magnet on the plane on which the backplane 30 is located can fall within the range of the backplane 30. For example, the first magnet may be a rectangular parallelepiped as shown in FIG. 5, and the backplane may also be a rectangular parallelepiped plate structure.

[0157] In some examples, the backplane 30 may alternatively be made of a material with a magnetic permeability greater than a preset threshold, such as a ferromagnetic material or a soft magnetic material. In this way, the magnetic field lines emitted by the first magnet may be preferentially closed by using a magnetically conductive backplane 30 with a smaller magnetic reluctance, thereby helping to weaken the magnetic field on one side of the backplane 30, strengthen the magnetic field at the working surface, and increase the interaction force between the first magnet and another magnet.

[0158] 29 to 34 are diagrams of the structure and corresponding cross sections of several magnet ring pairs according to embodiments of the present application. The magnet ring pairs include a first magnet ring and a second magnet ring that fit together. There may be a mutual attractive force between the first magnet ring and the second magnet ring, or there may be a mutual repulsive force between the first magnet ring and the second magnet ring. Below, we will describe an example in which two magnet rings attract each other.

[0159] The structure of at least one of the first and second magnet rings is similar to the structure of the ring-shaped first magnet or the ring-shaped magnet group formed by multiple first magnets in the above-described embodiments, which helps to increase the interaction force between the two magnet rings. The structures of the first magnet rings in Figures 29 to 34 are basically similar. First, the structure of the first magnet ring will be described.

[0160] As shown in Figure 29, the structure of the first magnet ring 500 is similar to that of the ring-shaped first magnet 10G in the above-mentioned embodiment. The first magnet ring 500 includes a first sub-magnet ring and a second sub-magnet ring. The first sub-magnet ring is located outside the second sub-magnet ring, and the inner wall of the first sub-magnet ring is in contact with the outer wall of the second sub-magnet ring. In other words, the inner diameter of the first sub-magnet ring is essentially equal to the outer diameter of the second sub-magnet ring.

[0161] A radial P-P cross section of the first magnet ring 500 is shown in FIG. 30. The rectangle on the left corresponds to the cross section of the first sub-magnet ring, and the rectangle on the right corresponds to the cross section of the second sub-magnet ring. The directions of the arrows in the two rectangles may indicate the directions of the magnetic field lines in the first sub-magnet ring and the second sub-magnet ring, respectively. The direction of the magnetic field lines in the first sub-magnet ring is inclined toward the axial direction of the first magnet ring 500. That is, the direction of the magnetic field lines in the first sub-magnet ring is inclined toward the normal to the plane in which the first magnet ring 500 is located. The direction of the magnetic field lines in the second sub-magnet ring is inclined toward the axial direction of the first magnet ring 500. That is, the direction of the magnetic field lines in the second sub-magnet ring is inclined toward the normal to the plane in which the first magnet ring 500 is located.

[0162] For example, the included angle between the direction of the magnetic field lines in the first sub-magnet ring and the axial direction of the first magnet ring 500 is α1, and the included angle between the direction of the magnetic field lines in the second sub-magnet ring and the axial direction of the first magnet ring 500 is α2. In this case, the value range of α1 is 0<α1<90°, and the value range of α2 is 0<α2<90°.

[0163] To further improve the distribution of the magnetic field lines of the first magnet ring 500 and increase the interaction force between the first magnet ring 500 and the second magnet ring 600, the value range of α1 may be set to 0<α1≦60°, for example, 15°, 30°, 45°, or 60°. The value range of α2 may be set to 0<α2≦60°, for example, 15°, 30°, 45°, or 60°.

[0164] The magnetic poles on the two sides of the contact surface between the first sub-magnet ring and the second sub-magnet ring may be opposite, so that more magnetic field lines can be distributed near the surface of the first magnet ring 500 that is closer to the second magnet ring 600. For example, the south pole of the first sub-magnet ring may be adjacent to or in contact with the north pole of the second sub-magnet ring, or the north pole of the first sub-magnet ring may be adjacent to or in contact with the south pole of the second sub-magnet ring.

[0165] By adjusting the relationship between the direction of the magnetic field lines in the first sub-magnet ring and the direction of the magnetic field lines in the second sub-magnet ring, the distribution of the magnetic field lines in the first magnet ring 500 can be further improved and the interaction force between the first magnet ring 500 and the second magnet ring 600 can be increased. For example, there may be a certain difference between the included angle α1 and the included angle α2. For example, α1-α2=σ, and the value range of σ is -5°≦σ≦5°, for example, -5°, -3°, 0°, 3°, or 5°.

[0166] In some examples, the width of the first sub-magnet ring may be equal to the width of the second sub-magnet ring. That is, the widths of the two rectangles on the left and right sides of the cross section of the first magnet ring 500 are equal. The width of the first sub-magnet ring is set equal to the width of the second sub-magnet ring, so that the magnetic field lines of the first sub-magnet ring and the second sub-magnet ring located inside and outside the first magnet ring 500 can cancel each other out as much as possible, and the magnetic field lines of the first sub-magnet ring and the second sub-magnet ring located on the surface of the first magnet ring 500 closer to the second magnet ring 600 can overlap. This can increase the interaction force between the first magnet ring 500 and the second magnet ring 600.

[0167] In some examples, a third sub-magnet ring may be further disposed between the first and second sub-magnet rings. The direction of the magnetic field lines in the third sub-magnet ring may be in the radial direction of the first magnet ring 500. That is, the direction of the magnetic field lines in the third sub-magnet ring may be perpendicular to the normal direction of the plane in which the first magnet ring 500 is located. The north pole of the third sub-magnet ring may be disposed near the south pole of the first sub-magnet ring, and the south pole of the third sub-magnet ring may be disposed near the north pole of the second sub-magnet ring.

[0168] In some examples, the first magnet ring 500 may further include a fourth sub-magnet ring and a fifth sub-magnet ring. The fourth sub-magnet ring may be located outside the fifth sub-magnet ring. The inner wall of the fourth sub-magnet ring is in contact with the outer wall of the fifth sub-magnet ring. The outer wall of the fourth sub-magnet ring is in contact with the inner wall of the second sub-magnet ring. In other words, the first magnet ring 500 may be considered a concentric ring structure formed by sequentially nesting the first sub-magnet ring, the second sub-magnet ring, the fourth sub-magnet ring, and the fifth sub-magnet ring.

[0169] The structure of the fourth sub-magnet ring is similar to that of the first sub-magnet ring, and the structure of the fifth sub-magnet ring is similar to that of the second sub-magnet ring. For the structure of the fourth sub-magnet ring and the structure of the fifth sub-magnet ring, please refer to the description of the structure of the first sub-magnet ring and the structure of the second sub-magnet ring. For the sake of brevity, the details will not be described again here.

[0170] The configuration of the coupled magnet ring that interacts with the first magnet ring 500 is determined based on the type of interaction between the two magnet rings. In some examples, there is a mutual attraction between the first magnet ring 500 and the coupled magnet ring.

[0171] 29 and 30 further show the structure of the second magnet ring 600 coupled to the first magnet ring 500 and its radial cross section. The second magnet ring 600 may include a sixth sub-magnet ring 610 and a seventh sub-magnet ring 620. The sixth sub-magnet ring 610 is located outside the seventh sub-magnet ring 620, and the sixth sub-magnet ring 610 and the seventh sub-magnet ring 620 are spaced apart. In other words, the inner diameter of the sixth sub-magnet ring 610 is larger than the outer diameter of the seventh sub-magnet ring 620. In other words, a gap region may be disposed between the sixth sub-magnet ring 610 and the seventh sub-magnet ring 620, and the gap region may also be referred to as a magnetic-free region.

[0172] Referring to a cross-sectional view of the second magnet ring 600, the direction of the magnetic field lines inside the sixth sub-magnet ring 610 located on the outside and the direction of the magnetic field lines inside the seventh sub-magnet ring 620 located on the inside are both parallel to the axial direction of the second magnet ring 600. The direction of the magnetic field lines inside the sixth sub-magnet ring 610 is opposite to the direction of the magnetic field lines inside the seventh sub-magnet ring 620. Specifically, the south pole of the sixth sub-magnet ring 610 is positioned close to the north pole of the first sub-magnet ring, the north pole of the sixth sub-magnet ring 610 is positioned away from the north pole of the first sub-magnet ring, the north pole of the seventh sub-magnet ring 620 is positioned close to the south pole of the second sub-magnet ring, and the south pole of the seventh sub-magnet ring 620 is positioned away from the south pole of the second sub-magnet ring.

[0173] In some examples, the shape of the first magnet ring 500 may match the shape of the second magnet ring 600 to enable the use of more magnetic field lines between the first magnet ring 500 and the second magnet ring 600, thereby increasing the interaction force between the two magnet rings. Specifically, the distance R1 between the ring center O1 of the first magnet ring 500 and the center line of the cross section of the magnet ring and the distance R2 between the ring center O2 of the second magnet ring 600 and the center line of the cross section of the magnet ring should be essentially equal. In other words, the difference δ between R1 and R2 should be less than a preset threshold.

[0174] The correspondence between the shape of the first magnet ring 500 and the shape of the second magnet ring 600 may be understood as two cross sections of the first magnet ring 500 and the second magnet ring 600 at the same position being axially symmetrical about the same line, i.e., the centerlines of the two cross sections overlap.

[0175] D1 and D2 represent the widths of the first and second magnet rings 500 and 600, respectively. In some examples, D2≧D1. Because the magnetic field lines in both the first and second sub-magnet rings are obliquely arranged, a wider second magnet ring 600 helps to allow more magnetic field lines emitted by the first and second sub-magnet rings 500 to enter the second magnet ring 600, and also helps to allow more magnetic field lines emitted by the second magnet ring 600 to enter the first magnet ring 500, thereby helping to increase the interaction force between the first and second magnet rings 500 and 600.

[0176] In some examples, the width of the second magnet ring 600 may be determined based on the included angle α1 between the direction of the magnetic field lines in the first sub-magnet ring and the axial direction of the first magnet ring 500, and the included angle α2 between the direction of the magnetic field lines in the second sub-magnet ring and the axial direction of the first magnet ring 500. Due to larger α1 and / or α2, the second magnet ring 600 may be given a larger magnet ring width, thereby helping to strengthen the interaction force between the two magnet rings.

[0177] 31 and 32 are another structural view and a radial cross-sectional view, respectively, of a third magnet ring 700 coupled to the first magnet ring 500. The direction of the magnetic field lines inside the third magnet ring 700 is the radial direction of the third magnet ring 700. That is, the direction of the magnetic field lines inside the third magnet ring 700 is perpendicular to the normal direction of the plane on which the third magnet ring 700 is located.

[0178] When the third magnet ring 700 and the first magnet ring 500 generate a mutual attractive force, the south pole of the third magnet ring 700 may be positioned adjacent to the north pole of the first sub-magnet ring, and the north pole of the third magnet ring 700 may be positioned adjacent to the south pole of the second sub-magnet ring. As shown in FIG. 34 , the south pole of the third magnet ring 700 may be located outside the third magnet ring 700, and the north pole of the third magnet ring 700 may be located inside the third magnet ring 700.

[0179] In some examples, the shape of the first magnet ring 500 may match the shape of the third magnet ring 700 to enable the use of more magnetic field lines between the first magnet ring 500 and the third magnet ring 700, thereby increasing the interaction force between the two magnet rings. Specifically, the distance R1 between the ring center O1 of the first magnet ring 500 and the center line of the cross section of the magnet ring and the distance R3 between the ring center O3 of the third magnet ring 700 and the center line of the cross section of the magnet ring should be essentially equal. In other words, the difference δ between R1 and R3 should be less than a preset threshold.

[0180] The correspondence between the shape of the first magnet ring 500 and the shape of the third magnet ring 700 may be understood as the two cross sections of the first magnet ring 500 and the third magnet ring 700 at the same position being axially symmetrical about the same line, i.e., the centerlines of the two cross sections overlap.

[0181] 32 is a radial QQ cross-section of the third magnet ring 700. D1 and D3 represent the widths of the first and third magnet rings 500 and 700, respectively. In some examples, D3≧D1. Because the magnetic field lines in the first and second sub-magnet rings are both obliquely arranged, a wider third magnet ring 700 helps to allow more magnetic field lines emitted by the first and second sub-magnet rings 500 to enter the third magnet ring 700, thereby increasing the interaction force between the first and third magnet rings 500 and 700.

[0182] In some examples, the width of the third magnet ring 700 may be determined based on the included angle α1 between the direction of the magnetic field lines in the first sub-magnet ring and the axial direction of the first magnet ring 500, and the included angle α2 between the direction of the magnetic field lines in the second sub-magnet ring and the axial direction of the first magnet ring 500. Due to larger α1 and / or α2, the third magnet ring 700 may be given a larger magnet ring width, thereby helping to strengthen the interaction force between the two magnet rings.

[0183] 33 and 34 are yet another structural view and a radial cross-sectional view, respectively, of a fourth magnet ring 800 coupled to the first magnet ring 500. The structure of the fourth magnet ring 800 is similar to that of the first magnet ring 500.

[0184] The fourth magnet ring 800 includes an eighth sub-magnet ring 810 and a ninth sub-magnet ring 820. The eighth sub-magnet ring 810 is located outside the ninth sub-magnet ring 820, and the inner wall of the eighth sub-magnet ring 800 may contact the outer wall of the ninth sub-magnet ring 900. That is, the inner diameter of the eighth sub-magnet ring 800 is essentially equal to the outer diameter of the ninth sub-magnet ring 900.

[0185] 34 , the direction of the magnetic field lines inside the eighth sub-magnet ring 810 is inclined toward the normal to the plane on which the fourth magnet ring 800 is located, and the direction of the magnetic field lines inside the ninth sub-magnet ring 820 is inclined toward the normal to the plane on which the fourth magnet ring 800 is located. The south pole of the eighth sub-magnet ring 810 is arranged close to the north pole of the first sub-magnet ring, the north pole of the ninth sub-magnet ring 820 is arranged close to the south pole of the second sub-magnet ring, and the north pole of the eighth sub-magnet ring 810 is arranged close to the south pole of the ninth sub-magnet ring 820.

[0186] The structure of the eighth sub-magnet ring 810 and the structure of the ninth sub-magnet ring 820 are similar to the structure of the first sub-magnet ring and the second sub-magnet ring. For detailed description, please refer to the relevant contents of Figures 29 and 30. For the sake of brevity, the details will not be described again here.

[0187] In some examples, the shape of the first magnet ring 500 may match the shape of the fourth magnet ring 800 to enable the use of more magnetic field lines between the first magnet ring 500 and the fourth magnet ring 800 and increase the interaction force between the two magnet rings. Specifically, the distance R1 between the ring center O1 of the first magnet ring 500 and the center line of the cross section of the magnet ring and the distance R4 between the ring center O4 of the fourth magnet ring 800 and the center line of the cross section of the magnet ring should be essentially equal. In other words, the difference δ between R1 and R4 should be less than a preset threshold.

[0188] The correspondence between the shape of the first magnet ring 500 and the shape of the fourth magnet ring 800 may be understood as the two cross sections of the first magnet ring 500 and the fourth magnet ring 800 at the same position being axially symmetrical about the same line, i.e., the centerlines of the two cross sections overlap.

[0189] FIG. 34 is a diagram showing a radial UU cross section of the fourth magnet ring 800. Because the magnetic field lines inside the first, second, eighth, and ninth sub-magnet rings 810, 820 are all obliquely arranged, the widths of the first and fourth magnet rings 500, 800 should be as equal as possible to increase the interaction force between them. That is, D5 and D6 represent the widths of the first and fourth magnet rings 500, 800, respectively. In some examples, D5 = D6. In some examples, |D5 - D6| ≤ τ and τ ≥ 0. It should be understood that a smaller value of τ indicates closer widths of the two magnet rings. When the volumes of the two interacting magnet rings are fixed, the interaction force between the two magnet rings is stronger.

[0190] Similar to the arrangement of a backplane on the same face of the two sub-magnets of the first magnet, a backplane may also be arranged on the connecting face on another side opposite to the working face of the first and second sub-magnet rings in the first magnet ring 500. The backplane may be made of a material whose magnetic permeability is greater than a preset threshold, for example, a ferromagnetic material or a soft magnetic material.

[0191] Arranging the backplane structure can relatively fix two sub-magnet rings located inside the same magnet ring, and by using a backplane structure with good magnetic conductivity, it can allow the magnetic field lines between the two sub-magnet rings to be closed, thereby helping to improve the magnetic field line density emitted by the first magnet ring 500 and helping to increase the interaction force between the first magnet ring 500 and the second magnet ring, the third magnet ring, or the fourth magnet ring.

[0192] The first magnet ring 500 provided in the embodiment of the present application can be applied to different application scenarios. Figures 35 and 36 provide two application methods of the first magnet ring 500 as examples. It should be understood that the first magnet ring 500 may also be applied to scenarios other than those shown in Figures 35 and 36, such as a magnetic protective case for an electronic device or a magnetic mobile power pack. This is not a limitation of the present application.

[0193] FIG. 35 illustrates a wireless charging cradle 2000 according to an embodiment of the present application. The wireless charging cradle 2000 may include a cover 2100 and a housing 2200. The cover 2100 may cover the housing 2200. The cover 2100 and the housing 2200 may enclose a storage space. The storage space may accommodate a first connecting ring 2300 and a charging coil 2400 of the wireless charging cradle 2000. The first connecting ring 2300 may be any of the first magnetic rings provided above. The charging coil 2400 is disposed within the area enclosed by the first connecting ring 2300, and the charging coil 2400 is further connected to a circuit board within the wireless charging cradle 2000. The circuit board is disposed outside the area enclosed by the first connecting ring 2300. In some examples, a notch is disposed in the first connection ring 2300, and an interconnection line connecting the charging coil 2400 and the circuit board can connect the charging coil 2400 inside the first connection ring to the circuit board outside the first connection ring 2300 through the notch.

[0194] The first connecting ring 2300 in the wireless charging cradle 2000 can be mated with a coupled connecting ring installed on the electronic device. There may be a mutual magnetic attraction between the first connecting ring 2300 and the coupled connecting ring. When the electronic device is placed on the wireless charging cradle 2000 (e.g., on the cover 2100), the mutual attraction between the first connecting ring 2300 and the coupled connecting ring on the electronic device may attract the electronic device to the wireless charging cradle 2000. Therefore, the electronic device is less likely to slip off the wireless charging cradle 2000 during the wireless charging process, improving the reliability and stability of the wireless charging function of the electronic device.

[0195] 36 shows an electronic device 3000 according to an embodiment of the present application. A second connecting ring 3100 is disposed inside the electronic device 3000, and the second connecting ring 3100 may be attached to a surface of the rear cover of the electronic device 3000 that faces the inside of the electronic device 3000. The second connecting ring 3100 may be any of the first magnetic rings provided in the previous embodiments.

[0196] In some examples, the second connecting ring 3100 and an associated connecting ring in an accessory of the electronic device 3000, such as a protective housing, bracket, and charging cradle for the electronic device 3000, may generate a mutual attractive force. When the electronic device 3000 is in proximity to one or more of the aforementioned accessories, the mutual attractive force between the second connecting ring 3100 and the associated connecting ring may be used to secure the electronic device 3000 and the accessory relative to one another.

[0197] In some examples, the electronic device 3000 supports a wireless charging function, and a wireless charging coil is further housed inside the electronic device 3000, and the wireless charging coil is electrically connected to a main board in the electronic device. The wireless charging coil may be located within an area surrounded by the second connection ring 3100, and a circuit board of the electronic device may be located outside the area surrounded by the second connection ring 3100, and a notch may be disposed in the second connection ring 3100, and an interconnection line between the wireless charging coil and the circuit board may pass through the notch disposed in the second connection ring 3100.

[0198] References herein to "one embodiment," "some embodiments," etc., indicate that one or more embodiments of the application include a particular feature, structure, or characteristic described with reference to the embodiment. Thus, statements such as "in one embodiment," "in some embodiments," "in some other embodiments," and "in other embodiments" appearing throughout this specification are not necessarily meant to refer to the same embodiment. Rather, unless specifically emphasized otherwise, these statements mean "one or more, but not all, of the embodiments." The terms "comprise," "include," "have," and other variations all mean "including, but not limited to," unless specifically emphasized otherwise.

[0199] The above description is merely a specific implementation of the present application and is not intended to limit the scope of protection of the present application. Any modifications or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application will fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. a magnet having a plurality of magnet units arranged in a ring shape, the magnet units including a first magnet subunit and a second magnet subunit, the first magnet subunit and the second magnet subunit being fixed relative to each other, a first magnetic pole of the first magnet subunit adjacent to a second magnetic pole of the second magnet subunit, the first magnetic pole and the second magnetic pole being opposite, and both the first magnetic pole and the second magnetic pole being disposed adjacent to the same face of the magnet; The direction of the magnetic field lines inside the first magnet subunit is inclined toward the plane on which the magnet is located, and the direction of the magnetic field lines inside the second magnet subunit is inclined toward the plane on which the magnet is located. magnet.

2. the angle between the direction of the magnetic field lines inside the first magnet subunit and the plane on which the magnet is located is α, and the angle between the direction of the magnetic field lines inside the second magnet subunit and the plane on which the magnet is located is β; 30≦α<90° and 30≦β<90° 2. The magnet of claim 1 , wherein:

3. 3. The magnet of claim 2, wherein α=β.

4. the first magnet subunit has a first contact surface and a first exposed surface arranged opposite to each other, the second magnet subunit has a second contact surface and a second exposed surface arranged opposite to each other, the first contact surface and the second contact surface are arranged adjacent to each other, the first exposed surface is arranged apart from the second contact surface, and the second exposed surface is arranged apart from the first contact surface; a distance between the first contact surface and the first exposed surface is equal to a distance between the second contact surface and the second exposed surface; A magnet according to any one of claims 1 to 3.

5. 5. A magnet according to claim 1, wherein the magnet unit has a non-mirror symmetrical structure.

6. 6. The magnet of claim 5, wherein the magnet units have connecting walls, and two connecting walls of two adjacent magnet units in the plurality of magnet units are adjacent, the connecting walls include a first connecting wall and a second connecting wall arranged opposite each other, and a first end of the first connecting wall is provided with a first inverted angle.

7. the second end of the first connecting wall is provided with a second inverted angle, or the second end of the second connecting wall is provided with a second inverted angle; The first end and the second end are two ends of the magnet unit arranged opposite to each other. The magnet of claim 6.

8. 8. The magnet according to claim 5, wherein the magnet unit has the connecting wall, and two connecting walls of two adjacent magnet units among the plurality of magnet units are adjacent, the connecting walls include the first connecting wall and the second connecting wall arranged opposite each other, and a plane in which the first connecting wall is located intersects with a plane in which the second connecting wall is located.

9. 9. The magnet according to claim 1, wherein a gap is arranged between at least two adjacent magnet units in the plurality of magnet units.

10. 10. The magnet of claim 1, further comprising a spacing unit located between two adjacent magnet units, the spacing unit having a magnetic field line direction different from the magnetic field line direction of the magnet units on the same side of the magnet.

11. 11. The magnet of claim 1, further comprising a backplane, the first magnetic pole and the second magnetic pole being arranged near a connecting surface of the magnet, the backplane being fixed to the connecting surface, and the backplane being made of a material having a magnetic permeability greater than a preset threshold.

12. a magnet, the magnet being ring-shaped, the magnet including a first sub-magnet and a second sub-magnet being ring-shaped, the first sub-magnet being sleeved around the second sub-magnet, the first sub-magnet and the second sub-magnet being relatively fixed, a first magnetic pole of the first sub-magnet being adjacent to a second magnetic pole of the second sub-magnet, the first magnetic pole and the second magnetic pole being opposite, and both the first magnetic pole and the second magnetic pole being disposed adjacent to the same face of the magnet; the direction of the magnetic field lines in the first sub-magnet is inclined toward the plane in which the magnet is located, and the direction of the magnetic field lines in the second sub-magnet is inclined toward the plane in which the magnet is located; magnet.

13. the angle between the direction of the magnetic field lines inside the first sub-magnet and the plane on which the magnet is located is α, the angle between the direction of the magnetic field lines inside the second sub-magnet and the plane on which the magnet is located is β, 30≦α<90° and 30≦β<90° 13. The magnet of claim 12, wherein:

14. 14. The magnet of claim 13, wherein α=β.

15. 15. A magnet according to any one of claims 12 to 14, wherein the width of the first sub-magnet is equal to the width of the second sub-magnet.

16. 16. A magnet according to any one of claims 12 to 15, comprising at least one notch.

17. 17. The magnet of claim 12, wherein the magnetic ring includes a plurality of spaced apart first and second magnetic portions, and the magnetic field lines of the first and second magnetic portions on the same side of the magnet have different directions.

18. 18. The magnet of claim 12, further comprising a backplane, the first magnetic pole and the second magnetic pole being arranged near a connecting surface of the magnet, the backplane being fixed to the connecting surface, and the backplane being made of a material having a magnetic permeability greater than a preset threshold.

19. 19. An electronic device comprising: a charging coil; a main board; and the magnet according to claim 1, wherein the charging coil is located within an area surrounded by the magnet, and the charging coil is electrically connected to the main board.

20. 19. A charging device comprising: a charging coil; a circuit board; and the magnet according to claim 1, wherein the charging coil is located within an area surrounded by the magnet, and the charging coil is electrically connected to the circuit board.

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