Wireless charging system and wireless charging base

Abstract

The present application discloses a wireless charging system and a wireless charging base, which relate to the field of wireless charging technology and can wirelessly charge an electronic stylus through the wireless charging base. The wireless charging base includes a wireless charging base and an electronic stylus, wherein the wireless charging base includes a first charging coil and a first magnetic attraction member, the first charging coil includes a first magnetic conductive plate and a first coil body, the first magnetic conductive plate includes a first surface, and the first coil body is stacked on the first surface; the electronic stylus includes a second charging coil and a second magnetic attraction member, the second charging coil includes a magnetic core and a second coil body, the second coil body is wound around the outer peripheral surface of the magnetic core, the second magnetic attraction member is used to magnetically cooperate with the first magnetic attraction member, and when the second magnetic attraction member is magnetically cooperated with the first magnetic attraction member, the orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the first coil body on the first surface.

Description

Technical Field

[0001] The present application relates to the field of wireless charging technology, and in particular to a wireless charging system and a wireless charging base. Background Art

[0002] Electronic styluses are mainly charged by wired charging and wireless charging. Among them, wired charging usually sets a wired charging interface on the electronic stylus, and then connects it to a power supply device such as an adapter through a cable. This charging method makes it difficult to achieve the integrity and aesthetic appearance of the electronic stylus. Therefore, most electronic styluses are charged by wireless charging. The wireless charging method usually sets a wireless charging coil on both the electronic device such as a tablet computer and the electronic stylus. When the electronic stylus is fixed to the electronic device, the wireless charging coil on the electronic stylus is coupled with the wireless charging coil on the electronic device to achieve wireless charging of the electronic stylus.

[0003] However, when electronic devices such as tablet computers do not have the function of charging electronic styluses due to factors such as the product's own positioning, users need to purchase wireless charging devices such as wireless charging magnetic bars and wireless charging pen boxes to wirelessly charge the electronic styluses, which increases the user's usage cost. Therefore, electronic styluses need to seek new charging methods. Summary of the invention

[0004] The present application provides a wireless charging system and a wireless charging base, which can wirelessly charge an electronic stylus through the wireless charging base. To achieve the above purpose, the present application adopts the following technical solutions:

[0005] In the first aspect, the present application proposes a wireless charging system, including a wireless charging base and an electronic stylus, the wireless charging base includes a first charging coil and a first magnetic attraction component, the first charging coil includes a first magnetic conductive plate and a first coil body, the first magnetic conductive plate includes a first surface, and the first coil body is stacked on the first surface; the electronic stylus includes a second charging coil and a second magnetic attraction component, the second charging coil includes a magnetic core and a second coil body, the second coil body is wound around the outer circumference of the magnetic core, the second magnetic attraction component is used to magnetically cooperate with the first magnetic attraction component, and when the second magnetic attraction component is magnetically cooperated with the first magnetic attraction component, the orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the first coil body on the first surface.

[0006] In this way, the wireless charging system in the present application can locate the charging position of the electronic stylus through the magnetic attraction of the first magnetic attraction member and the second magnetic attraction member, so that the first charging coil and the second charging coil have a good coupling state, and the wireless charging base can stably charge the electronic stylus. Therefore, the wireless charging base in the embodiment of the present application can not only be used to wirelessly charge electronic devices such as tablet computers and mobile phones, but also to wirelessly charge electronic styluses, which can expand the functions of the wireless charging base, expand the charging scenarios of electronic styluses, and improve the convenience of charging electronic styluses.

[0007] In a possible implementation of the first aspect, the first coil body is annular, the first coil body includes a first extension section, the first extension section is located on the annular extension path of the first coil body, the orthographic projection of the first coil body on the first surface overlaps with the orthographic projection of the first extension section on the first surface, the extension direction of the central axis of the second coil body is the first direction, the extension direction of the first extension section is the second direction, and the first direction is different from the second direction. In this way, the magnetic lines of force in the induced magnetic field H generated by the first charging coil can pass through the second coil body along the first direction, that is, the magnetic lines of force in the induced magnetic field H generated by the first charging coil can pass through the second coil body along the axial direction of the magnetic core to generate an induced current on the second coil body to charge the electronic stylus. That is, the magnetic lines of force in the induced magnetic field H generated by the first charging coil include magnetic lines of force extending along the first direction, and / or include magnetic lines of force having a component extending along the first direction.

[0008] In a possible implementation of the first aspect, the first extension segment includes a straight line segment, and the angle between the first direction and the second direction is greater than or equal to 60 degrees and less than or equal to 120 degrees, and / or the first extension segment includes an arc segment, and the angle between the first direction and a tangent of the first extension segment is greater than or equal to 60 degrees and less than or equal to 120 degrees. In this way, more magnetic lines of force can pass through the second coil body along the first direction, thereby ensuring the coupling coefficient between the first charging coil and the second charging coil, which is conducive to improving the charging efficiency of the wireless charging base for the electronic stylus.

[0009] In a possible implementation of the first aspect, the first coil body is annular, a through hole is formed in the middle of the first coil body, and the central axis of the second coil body intersects with the central axis of the through hole. In this way, the number of magnetic lines of force passing through the second coil body in the first direction can be further increased, thereby further increasing the coupling coefficient between the first charging coil and the second charging coil, and improving the charging efficiency.

[0010] In a possible implementation of the first aspect, the first coil body includes an outer coil, a middle coil, and an inner coil arranged in sequence in the radial direction of the first coil body, the outer coil is located on a side of the middle coil away from the through hole, the inner coil is located on a side of the middle coil close to the through hole, the magnetic field strength of the area where the outer coil is located is a first strength, the magnetic field strength of the area where the middle coil is located is a second strength, the magnetic field strength of the area where the inner coil is located is a third strength, the second strength is greater than or equal to the first strength, and the second strength is greater than or equal to the third strength, and the orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the middle coil on the first surface. In this way, it can be ensured that the area covered by the second charging coil has a higher magnetic field strength, the number of magnetic lines of force passing through the second coil body in the first direction can be increased, and thus the charging efficiency of the electronic stylus can be improved. That is, it can be ensured that the area where the first coil body is aligned with the second charging coil has a higher magnetic field strength, and the charging efficiency of the electronic stylus can be improved.

[0011] In a possible implementation of the first aspect, the orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the outer coil on the first surface, and the orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the inner coil on the first surface. In this way, during the charging process, the uniformity and symmetry of the magnetic field environment in which the second charging coil is located can be ensured, and it is helpful to increase the overlapping area of ​​the orthographic projection of the second charging coil on the first surface and the orthographic projection of the first coil body on the first surface, and can further increase the number of magnetic lines of force passing through the second coil body in the first direction, thereby improving the coupling coefficient between the first charging coil and the second charging coil, which is helpful to improve the charging efficiency.

[0012] In a possible implementation of the first aspect, the first coil body is annular, a through hole is formed in the middle of the first coil body, and the first magnetic member is arranged on the first magnetic conductive plate and located in the through hole. In this way, on the one hand, the first magnetic member can be surrounded by the first coil body, and whether the second charging coil is located on the side of the second magnetic member close to the pen tip or on the side of the second magnetic member close to the back cover, the orthographic projection of the second charging coil on the first surface can overlap with the orthographic projection of the first coil body on the first surface, which is convenient for coupling between the first charging coil and the second charging coil; on the other hand, the space in the middle of the first coil body can be fully utilized to make the structure of the wireless charging base more compact, which is conducive to reducing the overall volume of the wireless charging base and realizing the miniaturization design of the wireless charging base; on the other hand, the magnetic field strength in the through hole of the first coil body is low (that is, the magnetic induction density is low), and the first magnetic member is arranged in the through hole, which can reduce the interference of the first magnetic member on the induced magnetic field.

[0013] In a possible implementation of the first aspect, the first coil body includes a first inner circumferential surface, and a distance between the first magnetic attraction member and the first inner circumferential surface is greater than or equal to 3 mm. In this way, interference of the first magnetic attraction member with the induced magnetic field can be avoided.

[0014] In a possible implementation of the first aspect, the first coil body includes a first inner circumferential surface, and the spacing between the first magnetic member and the first inner circumferential surface is greater than or equal to 3 mm and less than or equal to 5 mm. In this way, on the one hand, the first magnetic member can be prevented from interfering with the induced magnetic field between the first charging coil and the second charging coil, and on the other hand, it is helpful to increase the length of the first magnetic member and ensure the volume of the first magnetic member, thereby ensuring the magnetic attraction between the first magnetic member and the second magnetic member.

[0015] In a possible implementation of the first aspect, the orthographic projection of the center of the first magnetic attraction member on the first surface covers the orthographic projection of the center of the through hole on the first surface. Since the magnetic induction density at the through hole is the lowest, the orthographic projection of the center of the first magnetic attraction member on the first surface covers the orthographic projection of the center of the through hole on the first surface, which can reduce the interference of the first magnetic attraction member on the induced magnetic field.

[0016] In a possible implementation of the first aspect, the orthographic projection of the center of the first magnetic member on the first surface coincides with the orthographic projection of the center of the through hole on the first surface. This is conducive to increasing the distance between the first magnetic member and the first coil body, and at the same time, it is conducive to increasing the length of the first magnetic member. In addition, the magnetic induction density at the through hole is the lowest, and the orthographic projection of the center of the first magnetic member on the first surface coincides with the orthographic projection of the center of the through hole on the first surface, which can reduce the interference of the first magnetic member on the induced magnetic field.

[0017] In a possible implementation of the first aspect, the magnetic core includes a first end face and a second end face that are opposite to each other in the axial direction, the first coil body includes a first inner peripheral face and a first outer peripheral face that are opposite to each other, the spacing between the first end face and the first inner peripheral face is a first spacing, the spacing between the second end face and the first outer peripheral face is a second spacing, and the difference between the first spacing and the second spacing is greater than or equal to -2 mm and less than or equal to 2 mm. In this way, the uniformity and symmetry of the magnetic field environment in which the second charging coil is located can be further ensured.

[0018] In a possible implementation of the first aspect, when the first magnetic attraction member and the second magnetic attraction member are magnetically matched, the distance between the first coil body and the second coil body is less than or equal to 3 mm. In this way, the coupling coefficient between the first charging coil and the second charging coil can be increased.

[0019] In a possible implementation of the first aspect, the wireless charging base includes a shell, the first charging coil is arranged in the shell, the shell includes a top plate, the top plate is located on the side of the first coil body away from the first magnetic conductive plate, and the minimum distance between the first coil body and the outer surface of the top plate is less than or equal to 2 mm. That is, the minimum value of the distance between the first coil body and the outer surface of the top plate is less than or equal to 2 mm. In this way, it is beneficial to reduce the distance between the first charging coil and the second charging coil, and it is beneficial to reduce the thickness of the wireless charging base, so as to realize the lightweight design of the wireless charging base and facilitate the storage and carrying of the wireless charging base.

[0020] In a possible implementation of the first aspect, the first magnetic member is disposed on an outer surface or an inner surface of the top plate. Another arrangement of the first magnetic member is provided.

[0021] In a possible implementation manner of the first aspect, an orthographic projection of the first magnetic attraction component on the first surface is located in the through hole.

[0022] In a possible implementation of the first aspect, the electronic stylus includes a pen holder, the second charging coil is disposed in the pen holder, and the minimum spacing between the second coil body and the outer circumference of the pen holder is less than or equal to 1 mm. This is conducive to reducing the spacing between the first charging coil and the second charging coil, and is conducive to reducing the radial size of the outer circumference of the electronic stylus, making it easier for a user to hold the electronic stylus.

[0023] In a possible implementation of the first aspect, the first magnetic member is in an elongated strip shape, and the length direction of the first magnetic member is parallel to the first surface. This is beneficial to increasing the volume of the first magnetic member, thereby facilitating increasing the magnetic attraction between the first magnetic member and the second magnetic member, and improving the position stability of the electronic stylus during charging, thereby improving the stability of the charging process.

[0024] In a possible implementation of the first aspect, both the first magnetic member and the second magnetic member are Halbach array magnets. The Halbach array magnet can gather magnetic lines of force on one side of the magnet and weaken the magnetic lines of force on the other side by arranging magnets with different magnetization directions according to a certain rule, thereby obtaining a relatively ideal unilateral magnetic field. In this way, by setting the first magnetic member and the second magnetic member as Halbach array magnets, the magnetic attraction between the first magnetic member and the second magnetic member can be improved, which is conducive to improving the adsorption reliability between the wireless charging base and the electronic stylus.

[0025] In a possible implementation of the first aspect, the first magnetic attraction member includes a first magnetic portion, a second magnetic portion, and a third magnetic portion, the first magnetic portion, the second magnetic portion, and the third magnetic portion are arranged in sequence in a third direction, the third direction is parallel to the first surface of the first magnetic conductive plate, the magnetization direction of the first magnetic portion is perpendicular to the first surface, the magnetization direction of the second magnetic portion is perpendicular to the magnetization direction of the first magnetic portion, and the magnetization direction of the third magnetic portion is opposite to the magnetization direction of the first magnetic portion, wherein the magnetic pole of one end of the second magnetic portion facing the first magnetic portion is the same as the magnetic pole of one end of the first magnetic portion facing away from the first magnetic conductive plate. A specific structure of the first magnetic attraction member is provided.

[0026] In a possible implementation of the first aspect, there are two second magnetic members, and the two second magnetic members are respectively arranged on both sides of the second charging coil. In this way, the electronic stylus can be positioned by magnetically cooperating with the first magnetic member through any one of the two second magnetic members, which can expand the charging scenario of the electronic stylus through the wireless charging base, and increase the probability of successful alignment between the electronic stylus and the wireless charging base, thereby reducing the difficulty of positioning between the electronic stylus and the wireless charging base. In addition, it can ensure that the electronic stylus has the same coupling coefficient in different charging scenarios, and can ensure charging efficiency.

[0027] In a possible implementation of the first aspect, the first magnetic conductive plate includes a second surface opposite to the first surface, and a first groove is provided on the first surface and is recessed toward the second surface, and at least a portion of the first magnetic member is located in the first groove. In this way, by providing the first groove, the overlapping size of the first magnetic conductive plate and the first magnetic member in the thickness direction of the wireless charging base can be reduced, which is beneficial to reducing the thickness of the wireless charging base. At the same time, the thickness of the first magnetic member can be increased, which is beneficial to increasing the volume of the first magnetic member, thereby facilitating increasing the magnetic attraction between the first magnetic member and the second magnetic member.

[0028] In a possible implementation of the first aspect, the size of the first magnetic attraction member in the thickness direction of the first magnetic conductive plate is larger than the size of the first groove in the thickness direction of the first magnetic conductive plate. That is, a portion of the first magnetic attraction member is located in the first groove.

[0029] In a possible implementation of the first aspect, the first magnetic conductive plate includes: a bottom plate portion, a first side plate portion, and a second side plate portion, and the first coil body and the bottom plate portion are stacked; the first side plate portion is arranged on the bottom plate portion and is located on the inner peripheral side of the first coil body; the second side plate portion is arranged on the bottom plate portion and is located on the outer peripheral side of the first coil body. In this way, the first side plate portion can block the interference of the structure located on the inner peripheral side of the first coil body on the magnetic field of the first charging coil, and the second side plate portion can reduce the interference of the structure on the outer peripheral side of the first coil body on the magnetic field of the first charging coil, which can increase the magnetic field strength of the first charging coil and is beneficial to improving the charging efficiency. At the same time, the first side plate portion and the second side plate portion of the bottom plate portion can also limit the first coil body to avoid dislocation of the first coil body during installation or use.

[0030] In a possible implementation of the first aspect, the bottom plate, the first side plate and the second side plate are an integrally formed structure. That is, the first magnetic conductive plate is an integrally formed part. In this way, the process of the first magnetic conductive plate can be simplified and the processing cost can be reduced.

[0031] In a possible implementation of the first aspect, the wireless charging system also includes an electronic device, the electronic device includes a third charging coil, the third charging coil includes a second magnetic conductive plate and a third coil body, the third coil body and the second magnetic conductive plate are stacked, and the third charging coil is used to couple with the first charging coil.

[0032] In a possible implementation of the first aspect, the electronic device includes a third magnetic member, and the third magnetic member is used to magnetically cooperate with the first magnetic member, and when the third magnetic member is magnetically cooperated with the first magnetic member, the orthographic projection of the center of the third coil body on the first surface coincides with the orthographic projection of the center of the first coil body on the first surface. In this way, when the electronic device is wirelessly charged through the wireless charging base, the third magnetic member can be magnetically cooperated with the first magnetic member to achieve alignment of the charging position of the electronic device, which can reduce the difficulty of aligning the electronic device with the wireless charging base, and during the charging process, the electronic device can be prevented from moving, which can improve the stability and reliability of the charging process.

[0033] In a second aspect, the present application provides a wireless charging system, including: an electronic device and an electronic stylus, the electronic device including a third charging coil and a third magnetic member, the third charging coil including a second magnetic conductive plate and a third coil body, the second magnetic conductive plate including a third surface, and the third coil body being arranged on the third surface; the electronic stylus including a second charging coil and a second magnetic member, the second charging coil including a magnetic core and a second coil body, the second coil body being wound around the outer circumference of the magnetic core, the second magnetic member being used for magnetically matching with the third magnetic member, and when the second magnetic member and the third magnetic member are magnetically matched, the orthographic projection of the second charging coil on the third surface overlaps with the orthographic projection of the third coil body on the third surface. Another implementation method for wirelessly charging an electronic stylus is provided.

[0034] In a possible implementation of the second aspect, the third coil body is annular, and the third coil body includes a second extension segment, the second extension segment is located on the annular extension path of the third coil body, the orthographic projection of the third coil body on the third surface overlaps with the orthographic projection of the second extension segment on the third surface, the extension direction of the central axis of the second coil body is a first direction, the extension direction of the second extension segment is a fourth direction, and the first direction is different from the fourth direction.

[0035] In a possible implementation manner of the second aspect, the second extension segment includes a straight line segment, and an angle between the first direction and the fourth direction is greater than or equal to 60 degrees and less than or equal to 120 degrees. And / or the second extension segment includes an arc segment, and an angle between the first direction and a tangent of the first extension segment is greater than or equal to 60 degrees and less than or equal to 120 degrees.

[0036] In a possible implementation manner of the second aspect, the third coil body is annular, a center hole is formed in the middle of the third coil body, and a center axis of the second coil body intersects with a center axis of the center hole.

[0037] In the third aspect, the present application provides a wireless charging base, comprising: a first charging coil and a first magnetic component, the first charging coil comprising a first magnetic conductive plate and a first coil body, the first magnetic conductive plate comprising a first surface, and the first coil body is arranged on the first surface; the first magnetic component is used to magnetically cooperate with the second magnetic component on the electronic stylus, and when the first magnetic component and the second magnetic component are magnetically cooperated, the orthographic projection of the second charging coil of the electronic stylus on the first surface overlaps with the orthographic projection of the first coil body on the first surface.

[0038] In a possible implementation manner of the third aspect, the first coil body is ring-shaped, a through hole is formed in the middle of the first coil body, and the first magnetic attraction member is disposed on the first magnetic conductive plate and located in the through hole.

[0039] In a possible implementation of the third aspect, the wireless charging base includes a shell, the first charging coil is arranged in the shell, the shell includes a top plate, the top plate is located on the side facing the first surface, and the first magnetic attraction member is arranged on the top plate.

[0040] Among them, the technical effects brought about by any implementation method in the second aspect to the third aspect can refer to the technical effects brought about by different implementation methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of a wireless charging device provided in some embodiments of the present application for wirelessly charging an electronic stylus;

[0042] Figure 2 A schematic diagram of a wireless charging device provided in some other embodiments of the present application for wirelessly charging an electronic stylus;

[0043] Figure 3 A schematic diagram of a wireless charging base provided in some embodiments of the present application performing wireless charging on an electronic device;

[0044] Figure 4 Schematic diagram of wireless charging bases provided in other embodiments of the present application for wirelessly charging electronic devices;

[0045] Figure 5 for Figure 4 Another schematic diagram of a wireless charging base in the embodiment of the present invention wirelessly charging an electronic device;

[0046] Figure 6 A schematic diagram of the structure of a wireless charging system provided in some embodiments of the present application;

[0047] Figure 7 for Figure 6 A schematic diagram of the structure of a wireless charging base in the wireless charging system shown;

[0048] Figure 8 for Figure 7 An exploded view of the wireless charging base shown;

[0049] Fig. 9 for Figure 8 A three-dimensional view of a first charging coil of the wireless charging base;

[0050] Fig.10 for Figure 6 A schematic diagram of an electronic stylus in the wireless charging system shown;

[0051] Fig.11 for Fig.10 An exploded schematic diagram of the electronic stylus shown;

[0052] Fig.12 for Fig.11 A perspective view of a second charging coil in the electronic stylus;

[0053] Fig.13 for Figure 6 A schematic diagram of a wireless charging base in a wireless charging system wirelessly charging an electronic stylus;

[0054] Fig.14 for Figure 6 In the wireless charging system shown, when the wireless charging base wirelessly charges the electronic stylus, a schematic diagram of the positional relationship between the first charging coil, the first magnetic attraction component, the second charging coil, and the second magnetic attraction component;

[0055] Fig.15a for Fig.14 A top view of the schematic diagram of the positional relationship shown;

[0056] Fig.15b for Fig.13 A schematic diagram of an induced magnetic field generated by a first charging coil of the wireless charging system shown;

[0057] Fig.16 for Fig.13 A schematic diagram of a wireless charging base in a wireless charging system wirelessly charging an electronic stylus;

[0058] Fig.17 for Fig.16 Enlarged view of the middle A area;

[0059] Fig.18 for Figure 7 Another schematic diagram of the wireless charging base shown;

[0060] Fig.19a for Figure 6 A schematic diagram of another charging scenario of the wireless charging system shown;

[0061] Fig.19b for Fig.19a Another schematic diagram of the charging scenario shown;

[0062] Fig. 20 A simulation relationship diagram of the distance of the center of the second charging coil from the center of the through hole and the coupling coefficient between the first charging coil and the second charging coil provided in some embodiments of the present application;

[0063] Fig.21 A schematic diagram of the positional relationship between a first charging coil and a second charging coil provided in some embodiments of the present application;

[0064] Fig. 22Another schematic diagram of the positional relationship between the first charging coil and the second charging coil provided in some embodiments of the present application;

[0065] Fig.23 A schematic diagram of assembling a first charging coil and a first magnetic attraction member provided in some other embodiments of the present application;

[0066] Fig.24 An exploded view of a first charging coil provided in some other embodiments of the present application;

[0067] Fig.25 for Fig.24 The exploded view shown is a schematic diagram of the assembly of the first coil body and the first magnetic conductive plate;

[0068] Fig.26 for Fig.25 A schematic diagram of the assembly of the first charging coil and the housing of the wireless charging base is shown;

[0069] Fig. 27 for Figure 7 The schematic diagram of the wireless charging base performing wireless charging on an electronic device is shown;

[0070] Fig.28 for Fig. 27 a perspective view of the electronic device in the schematic diagram shown;

[0071] Fig.29 for Fig.28 The stereogram shown is a cross-sectional view at line AA;

[0072] Fig.30 for Fig.28 another schematic diagram of the electronic device shown;

[0073] Fig.31 for Fig.30 The schematic diagram of the electronic device shown wirelessly charging the electronic stylus;

[0074] Fig.32 A schematic diagram of the structure of a wireless charging base provided in some other embodiments of the present application;

[0075] Fig.33 for Fig.32 A schematic diagram of a scenario in which a wireless charging base is charging an electronic stylus;

[0076] Fig.34 for Fig.32 The schematic diagram of the scenario in which the wireless charging base performs wireless charging on an electronic device is shown;

[0077] Fig.35 Schematic diagram of a wireless charging base provided for some other embodiments of the present application;

[0078] Fig.36 for Fig.35 Schematic diagram of a scenario in which a wireless charging base wirelessly charges an electronic stylus;

[0079] Fig.37 Schematic diagram of a wireless charging base provided for some other embodiments of the present application;

[0080] Fig.38 for Fig.37 Schematic diagram of a scenario in which a wireless charging base wirelessly charges an electronic stylus.

[0081] Reference numerals:

[0082] 1000. wireless charging system; 1001. wireless charging coil;

[0083] 100. wireless charging device; 101. first magnetic attraction structure;

[0084] 200, electronic stylus; 201, second magnetic attraction structure; 202, housing; 2021, pen holder; 2021a, first end; 2021b, second end; 2021c, first plane; 2021d, first arc surface; 2022, pen tip; 2022a, writing end; 2022b, connecting end; 2023, back cover; 203, second circuit board assembly; 2031, second circuit board; 2032, second electronic component; 204, first battery; 205, second charging coil; 2051, magnetic core; 2051a, first end surface; 2051b, second end surface; 2052, second coil body; 206, second magnetic attraction member; 2061, fourth magnetic part; 2062, fifth magnetic part; 2063, sixth magnetic part;

[0085] 300, wireless charging base; 301, supporting step; 302, shell; 3021, top plate; 3022, bottom plate; 3023, side plate; 3024, socket; 303, first charging coil; 3031, first magnetic conductive plate; 3031a, first surface; 3031b, second surface; 3031c, first groove; 3031d, bottom plate; 3031e, first side plate; 3031f, second side plate; 3032, first coil body; 3032a, through hole; 3032b, outer ring Coil; 3032c, middle coil; 3032d, inner coil; 3032e, first inner peripheral surface; 3032f, first outer peripheral surface; 3032g, first extension section; 304, first circuit board assembly; 3041, first circuit board; 3042, first electronic component; 3043, power interface; 305, first magnetic attraction; 3051, first magnetic part; 3052, second magnetic part; 3053, third magnetic part; 305a, first mating surface; 305b, second mating surface; 306, main body;

[0086] 400, electronic device; 401, screen; 4011, light-transmitting cover; 4012, display screen; 402, back shell; 4021, back cover; 4022, frame; 4022a, first long side; 4022b, second long side; 4022c, first short side; 4022d, second short side; 403, middle plate; 404, second battery; 405, third charging coil; 4051, second magnetic conductive plate; 4021a, third surface; 4052, third coil body; 4052a, center hole; 406, third magnetic attraction member. DETAILED DESCRIPTION

[0087] In the embodiments of the present application, the terms "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0088] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0089] In the description of the embodiments of the present application, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present application generally indicates that the associated objects before and after are in an "or" relationship.

[0090] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship remains unchanged after the connection. "Rotational connection" means that the two are connected to each other and can rotate relative to each other after the connection. "Sliding connection" means that the two are connected to each other and can slide relative to each other after the connection.

[0091] In the description of the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0092] In the description of the embodiments of the present application, the terms "consistent in direction", "perpendicular", "parallel", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement being discussed and the errors associated with the measurement of a specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, the difference between the two equals is less than or equal to 5% of either one.

[0093] For ease of understanding, before the wireless charging system and the wireless charging base in the embodiments of the present application are introduced in detail, the relevant terms involved in the embodiments of the present application are first explained.

[0094] Reverse wireless charging function: refers to the function of an electronic device to wirelessly charge other electronic devices through a wireless charging coil.

[0095] Forward wireless charging function: refers to the function of an electronic device receiving wireless charging input from other wireless charging devices through a wireless charging coil for wireless charging.

[0096] Coupling coefficient: The degree of coupling between the transmitting coil and the receiving coil. The coupling coefficient is related to the positional offset of the two coils. When the offset between the transmitting coil and the receiving coil is small, the coupling coefficient is high, and vice versa. The higher the coupling coefficient between the transmitting coil and the receiving coil, the higher the efficiency of the power transmission between the transmitting coil and the receiving coil.

[0097] Qi: The "wireless charging" standard launched by the Wireless Power Consortium (WPC), the world's first standardization organization to promote wireless charging technology.

[0098] Magnetization direction: from the S pole to the N pole of the magnet.

[0099] With the rapid development of electronic devices (such as tablet computers, mobile phones, etc.), more and more electronic devices are equipped with touch screens, and touch control has become an important means for electronic devices to achieve human-computer interaction. At present, in addition to the touch control method of directly contacting and operating the touch screen with fingers, using an electronic stylus to click, write, and swipe on the touch screen is also a very common touch control method. In terms of the accuracy of input and control, using an electronic stylus is much higher than using fingers. Moreover, many touch functions are more in line with people's habits when performed using an electronic stylus. Therefore, quite a number of electronic devices currently have matching electronic styluses.

[0100] Electronic styluses are mainly charged by wired charging and wireless charging. Among them, wired charging usually sets a wired charging interface (such as Type-C, Micro B, POGO pin, USB interface, etc.) on the electronic stylus, and then connects it to a power supply device such as an adapter through a cable. This charging method is difficult to achieve the integrity and appearance of the electronic stylus. Therefore, most electronic styluses are charged by wireless charging. The wireless charging method is usually to set a wireless charging coil on both the wireless charging device and the electronic stylus. When the electronic stylus is fixed to the wireless charging device, the wireless charging coil on the electronic stylus is coupled with the wireless charging coil on the wireless charging device to achieve wireless charging of the electronic stylus.

[0101] Specifically, the wireless charging device can be an electronic device such as a mobile phone, a tablet computer, a wireless keyboard, etc. with a reverse wireless charging function, or it can be a device such as a wireless charging magnetic rod, a wireless charging pen box, etc.

[0102] Of course, the above-mentioned electronic device with reverse wireless charging function can also receive wireless charging input from other wireless charging devices through the wireless charging coil, that is, the electronic device supports forward wireless charging.

[0103] See also Figure 1 , Figure 1 The wireless charging device 100 provided for some embodiments of the present application is a schematic diagram of wireless charging of an electronic stylus 200. The wireless charging device 100 in this embodiment is a tablet computer. Specifically, during the wireless charging process, the wireless charging coil 1001 in the wireless charging device 100 can be used as a radio transmitter, and the wireless charging coil 1001 in the electronic stylus 200 can be used as a radio receiver. That is, the wireless charging coil 1001 in the wireless charging device 100 can be used as a transmission (transport, TX) coil, and the wireless charging coil 1001 in the electronic stylus 200 can be used as a receiving (receive, RX) coil.

[0104] After the electronic stylus 200 is fixed on the wireless charging device 100, there is an interface between the electronic stylus 200 and the wireless charging device 100. The wireless charging coil 1001 (also known as the transmitting coil) in the wireless charging device 100 is located on one side of the interface, and the wireless charging coil 1001 (also known as the receiving coil) in the electronic stylus 200 is located on the other side of the interface.

[0105] See also Figure 1 During the wireless charging process, when an alternating current I1 is passed through the wireless charging coil 1001 (also known as the transmitting coil) in the wireless charging device 100, an alternating magnetic field H is generated around the wireless charging coil 1001 (also known as the receiving coil) in the electronic stylus 200. The magnetic induction lines of the magnetic field H at least partially pass through the area surrounded by the wireless charging coil 1001 in the electronic stylus 200. Based on this, according to the principle of electromagnetic induction, an alternating current I2 can be induced in the wireless charging coil 1001 in the electronic stylus 200, thereby realizing wireless transmission of electric energy, thereby enabling wireless charging of the battery provided in the electronic stylus 200.

[0106] In some embodiments, see Figure 1 The wireless charging coil 1001 in the electronic stylus 200 is a solenoid coil with a magnetic core. In order to facilitate energy interaction between the wireless charging coil 1001 in the wireless charging device 100 and the wireless charging coil 1001 in the electronic stylus 200, the wireless charging coil 1001 in the wireless charging device 100 is usually also a solenoid coil with a magnetic core.

[0107] On this basis, in order to ensure that the wireless charging coil 1001 in the wireless charging device 100 and the wireless charging coil 1001 in the electronic stylus 200 can be accurately aligned and reduce the difficulty of alignment, please refer to Figure 1, the wireless charging device 100 is provided with a first magnetic attraction structure 101, and the electronic stylus 200 is provided with a second magnetic attraction structure 201, and the second magnetic attraction structure 201 can cooperate with the first magnetic attraction structure 101 by magnetic attraction. The first magnetic attraction structure 101 and the second magnetic attraction structure 201 include but are not limited to adsorption magnets. In this way, during the charging process, auxiliary positioning can be performed by magnetic attraction cooperation between the first magnetic attraction structure 101 and the second magnetic attraction structure 201. On the one hand, it can ensure that the wireless charging coil 1001 on the electronic stylus 200 and the wireless charging device 100 can be aligned, reducing the difficulty of alignment. On the other hand, it can improve the connection reliability between the electronic stylus 200 and the wireless charging device 100, and avoid the separation of the electronic stylus 200 and the wireless charging device 100 during the charging process, so as to achieve stable wireless charging. In addition, it can also make the wireless charging coil 1001 in the wireless charging device 100 and the wireless charging coil 1001 in the electronic stylus 200 as close as possible, which is conducive to improving the charging efficiency.

[0108] In other embodiments, when electronic devices such as tablet computers and mobile phones do not have the function of charging the electronic stylus 200 (that is, the reverse wireless charging function) due to factors such as the product's own positioning, the electronic stylus 200 can also be wirelessly charged through a dedicated wireless charging magnetic rod, wireless charging pen box, or other wireless charging device 100.

[0109] See also Figure 2 , Figure 2 Schematic diagram of wireless charging device 100 for wireless charging of electronic stylus 200 provided in other embodiments of the present application. In this embodiment, wireless charging device 100 is a wireless charging magnetic rod. The process and positioning method of wireless charging magnetic rod for wireless charging of electronic stylus 200 are the same as the process and positioning method of electronic device for wireless charging of electronic stylus 200, and will not be described in detail here.

[0110] Since wireless charging magnetic rods and wireless charging pen cases usually need to be purchased separately by users, the cost of use for users is increased. However, the wireless charging technology for electronic devices such as mobile phones and tablets is developing rapidly. Many mobile phones, tablets and other electronic devices have forward wireless charging functions. Wireless charging for mobile phones, tablets and other electronic devices through wireless charging bases is becoming more and more popular. Therefore, more and more users have wireless charging bases. Among them, electronic devices and wireless charging bases can be charged based on the Qi protocol. The principle of wireless charging bases for electronic devices can refer to the introduction of the principle of wireless charging of electronic styluses by wireless charging devices in the above embodiments, which will not be described in detail here.

[0111] In this case, if the electronic stylus can be wirelessly charged through the above-mentioned wireless charging base, the wireless charging scenario of the electronic stylus can be expanded. At this time, even if the tablet computer, mobile phone and other electronic devices that are compatible with the electronic stylus do not have the function of charging the electronic stylus, the user does not need to purchase a special wireless charging device for the electronic stylus, which can improve the convenience of charging the electronic stylus for the user and reduce the cost of using the electronic stylus.

[0112] Currently, wireless charging bases include flat bases and vertical bases. Figure 3-Figure 5 , Figure 3 This is a schematic diagram of a wireless charging base 300 provided in some embodiments of the present application performing wireless charging on an electronic device 400. Figure 4 Schematic diagram of a wireless charging base 300 for wirelessly charging an electronic device 400 provided in some other embodiments of the present application, Figure 5 for Figure 4 Another schematic diagram of the wireless charging base 300 performing wireless charging on the electronic device 400. Figure 3-Figure 5 In the illustrated embodiments, the electronic device 400 is described as a mobile phone.

[0113] See also Figure 3 , Figure 3 The wireless charging base 300 in the illustrated embodiment is a flat base. The wireless charging base 300 in this embodiment can be placed horizontally on a support surface (such as a desktop), and the electronic device 400 can be placed horizontally on the wireless charging base 300 for wireless charging. Figure 4 and Figure 5 , Figure 4 and Figure 5 The wireless charging base 300 in the embodiment shown is a vertical base. The wireless charging base 300 in this embodiment can support the electronic device 400 to be placed vertically (such as Figure 4 ) for charging, and also supports the electronic device 400 being placed horizontally (as shown Figure 5 to charge.

[0114] Specifically, when the wireless charging coil in the electronic device 400 is close to the wireless charging coil in the wireless charging base 300 and the centers of the two are aligned, the electronic device 400 to be charged can be charged by the wireless charging base 300 .

[0115] It should be noted that in the embodiments of the present application, when the described component is a regular shape, the center of the described component is the geometric center of the component, and when the described component is an irregular shape, the center of the described component is the geometric centroid of the component. For example, when the described component is a ring shape, the center of the component is the center of the ring shape.

[0116] The wireless charging coil in the wireless charging base 300 and the wireless charging coil in electronic devices such as mobile phones and tablet computers are mainly planar coils, and the wireless charging coil in the electronic device 400 is arranged in the middle of the electronic device 400, so that the center of the wireless charging coil in the electronic device 400 and the wireless charging coil in the wireless charging base 300 are easily aligned. Figure 3 In the embodiment shown, the two wireless charging coils can be aligned by visual inspection. Figure 4 and Figure 5 In the illustrated embodiment, the electronic device 400 can be positioned by the support step 301 on the wireless charging base 300 so as to align the two wireless charging coils.

[0117] However, the electronic stylus 200 is constrained by its own design framework, and the position of the wireless charging coil 1001 in the electronic stylus 200 is not necessarily set in the middle of the electronic stylus 200. It is difficult for consumers to confirm the position of the wireless charging coil 1001 in the electronic stylus 200. When the wireless charging base 300 is used to wirelessly charge the electronic stylus 200, it is difficult to align the wireless charging coil 1001 in the electronic stylus 200 with the wireless charging coil in the wireless charging base 300. In addition, the wireless charging coil in the electronic stylus 200 is a solenoid coil with a magnetic core, not a planar coil. There is a big difference between the electromagnetic coupling between the solenoid coil and the planar coil and the electromagnetic coupling between the planar coils. If the center of the solenoid coil in the electronic stylus 200 is aligned with the center of the planar coil in the wireless charging base 300, the coupling energy between the solenoid coil and the planar coil is very low, that is, the coupling coefficient between the two is very small, approximately equal to 0, and the electronic stylus 200 cannot be effectively charged.

[0118] In order to charge the electronic stylus 200 through the wireless charging base 300, the embodiment of the present application provides a wireless charging system 1000. Figure 6 , Figure 6 The wireless charging system 1000 provided in some embodiments of the present application is a schematic diagram of the structure of the wireless charging system 1000. The wireless charging system 1000 includes a wireless charging base 300 and an electronic stylus 200, and can realize stable charging of the electronic stylus 200 by the wireless charging base 300.

[0119] See also Figure 7-Figure 8 , Figure 7 for Figure 6 The schematic diagram of the structure of the wireless charging base 300 in the wireless charging system 1000 is shown. Figure 8 for Figure 7The exploded view of the wireless charging base 300 is shown. The wireless charging base 300 in this embodiment is a flat base. In this embodiment, the wireless charging base 300 includes a housing 302, a first charging coil 303, a first magnetic attraction member 305 and a first circuit board assembly 304.

[0120] Understandably, Figure 7-Figure 8 The following figures and the related drawings only schematically illustrate some components of the wireless charging base 300, and the actual shapes, sizes, positions and structures of these components are not subject to the present invention. Figure 7-Figure 8 and the accompanying drawings below.

[0121] The housing 302 has a receiving space, and the housing 302 is used to protect the structure received therein. Figure 7 In the specific example shown, the housing 302 is in a disc shape (also called an oblate cylindrical shape). It is understandable that in other embodiments, the housing 302 may also be in a square disc shape, an elliptical disc shape, a triangular disc shape, etc., which are not specifically limited here.

[0122] See also Figure 7 and Figure 8 The housing 302 includes a top plate 3021, a bottom plate 3022 and a side plate 3023 connected between the top plate 3021 and the bottom plate 3022. The top plate 3021, the bottom plate 3022 and the side plate 3023 define the above-mentioned accommodation space. In some embodiments, please refer to Figure 8 , the top plate 3021 and the side plate 3023 are connected to form an upper cover. Specifically, the top plate 3021 and the side plate 3023 can be integrally formed into an upper cover, or they can be assembled and connected together by means of threaded connection, clamping, bonding, welding, etc. The upper cover and the bottom plate 3022 can be assembled and connected together by means of threaded connection, clamping, bonding, welding, etc. In this way, during assembly, the upper cover can be connected to the bottom plate 3022 as a structural member, which can simplify the structure of the housing 302 and reduce the difficulty of assembly.

[0123] In other embodiments, the bottom plate 3022 and the side plate 3023 may be connected to form a bottom shell, and during assembly, the bottom shell may be connected to the top plate 3021 as a structural member. Alternatively, the top plate 3021 and a part of the side plate 3023 may be connected to form an upper cover, and the bottom plate 3022 and a part of the side plate 3023 may be connected to form a bottom shell, and the upper cover is connected to the bottom shell. In this way, the structure of the housing 302 may be simplified and the difficulty of assembly may be reduced.

[0124] The wireless charging base 300 is used to transmit power to the side of the top plate 3021 facing away from the bottom plate 3022. On this basis, the material of the top plate 3021 includes but is not limited to non-metals such as plastic, graphite, ceramics, and carbon fiber. The non-metallic material allows the wireless charging base 300 to transmit power to the side of the top plate 3021 facing away from the bottom plate 3022, thereby realizing the charging function of the wireless charging base 300.

[0125] The material of the bottom plate 3022 includes, but is not limited to, metals such as copper, iron, aluminum, copper alloys, iron alloys, aluminum alloys, or non-metals such as plastics, graphite, ceramics, and carbon fibers. In some embodiments, the material of the bottom plate 3022 can be selected as metal. Specifically, the metal can be copper, iron, aluminum, copper alloys, iron alloys, aluminum alloys, and the like. In this way, the metal texture of the wireless charging base 300 can be improved, and at the same time, the heat dissipation performance of the metal is better, and the heat inside the wireless charging base 300 can be quickly conducted to the outside to improve the heat dissipation efficiency. The material of the side plate 3023 can be the same as that of the top plate 3021, or the same as that of the bottom plate 3022.

[0126] During the charging process, the wireless charging base 300 is placed on a support surface such as a desktop, a cabinet, or the ground, with the outer surface of the bottom plate 3022 facing the support surface, and the top plate 3021 is located on the side of the bottom plate 3022 facing away from the support surface, and the electronic stylus 200, mobile phone, tablet computer, and other devices waiting to be charged are supported on the outer surface of the top plate 3021. In the embodiment of the present application, the "outer surface of the bottom plate 3022" refers to the side surface of the bottom plate 3022 facing away from the internal space of the housing 302, and the "outer surface of the top plate 3021" refers to the side surface of the top plate 3021 facing away from the internal space of the housing 302.

[0127] The first charging coil 303 is located in the housing 302. Fig. 9 , Fig. 9 for Figure 8 The 3D diagram of the first charging coil 303 of the wireless charging base 300 is shown. The first charging coil 303 includes a first magnetic conductive plate 3031 and a first coil body 3032. The first coil body 3032 and the first magnetic conductive plate 3031 are stacked.

[0128] See also Figure 8 Combined with Fig. 9, the first coil body 3032 is annular. A through hole 3032a is formed in the middle of the first coil body 3032. The shape of the through hole 3032a can be circular, square, elliptical, triangular, polygonal, etc. The first coil body 3032 can be formed by winding a conductive wire along an annular track, and the shape of the annular track can be a circular ring, a square ring, an elliptical ring, a triangular ring, a polygonal ring, etc. The conductive wire can be a metal wire such as a copper wire, an aluminum wire, a gold wire, or an enameled wire. The first coil body 3032 can be a coil based on the Qi wireless charging standard.

[0129] In this embodiment, the first magnetic conductive plate 3031 is in the shape of a flat plate. For example, the first magnetic conductive plate 3031 may be in the shape of a circular plate, a square plate, an elliptical plate, etc. The first magnetic conductive plate 3031 includes a first surface 3031a and a second surface 3031b facing each other, and the first surface 3031a faces the top plate 3021. The first coil body 3032 may be stacked on the first surface 3031a of the first magnetic conductive plate 3031. For details, please refer to Fig. 9 The first coil body 3032 is a planar coil, and the first coil body 3032 is laid flat on the first surface 3031a. Exemplarily, the first coil body 3032 and the first magnetic conductive plate 3031 can be fixedly connected by bonding or the like.

[0130] The first magnetic conductive plate 3031 is used to converge magnetic lines of force, which can increase the magnetic field strength on the side of the first charging coil 303 facing the top plate 3021, and can be used to reduce the interference of other structures on the magnetic field. The first magnetic conductive plate 3031 may include a soft magnetic material. For example, the first magnetic conductive plate 3031 may include ferrite. In some other embodiments, the first magnetic conductive plate 3031 may also include at least one of soft magnetic materials such as neodymium iron boron alloy (Nd-Fe-B), samarium, aluminum nickel cobalt alloy (Al-Ni-Co), iron silicon aluminum alloy (Fe-Si-Al) and Permalloy (Ni-Fe), silicon steel sheet, etc.

[0131] See also Figure 8 , the first circuit board assembly 304 includes a first circuit board 3041 and a first electronic component 3042. The first circuit board 3041 is used to integrate the first electronic component 3042. The first circuit board 3041 can be used to realize the electrical connection between various first electronic components 3042 inside the wireless charging base 300, and the first circuit board 3041 can be used to perform signal control, data signal processing and other operations on the first electronic component 3042. The first circuit board 3041 includes but is not limited to a printed circuit board (PCB). The first circuit board 3041 can be a hard circuit board, a flexible circuit board or a hard-soft circuit board. The first circuit board 3041 can be fixed in the housing 302 by gluing, clamping, welding and the like.

[0132] The first electronic components 3042 include but are not limited to a DC-DC power supply chip, a wireless charging transmitter chip (also referred to as a Tx chip), a processor chip, and the like.

[0133] Please continue reading Figure 8 , a power interface 3043 is also provided on the first circuit board 3041, and a socket 3024 is provided on the housing 302. The power interface 3043 can be connected to a wired charger through the socket 3024 to receive charging input from the wired charger. Exemplarily, the power interface 3043 can be any one of a Type-C interface, a Micro B interface, or a POGO pin interface.

[0134] See also Fig.10 , Fig.10 for Figure 6 Schematic diagram of the electronic stylus 200 in the wireless charging system 1000 shown. The electronic stylus 200 is used to provide input to electronic devices such as tablet computers, mobile phones, laptop computers, e-readers, etc. The electronic stylus 200 and the electronic devices can be interconnected through a communication network to achieve wireless signal interaction. The communication network can be, but is not limited to, a short-range communication network such as a Wi-Fi hotspot network, a Wi-Fi peer-to-peer (P2P) network, a Bluetooth network, a Zigbee network, or a near field communication (NFC) network.

[0135] The electronic stylus 200 may be an inductive stylus or a capacitive stylus. Capacitive stylus may include a passive capacitive stylus and an active capacitive stylus. A passive capacitive stylus may be referred to as a passive capacitive stylus, and an active capacitive stylus may be referred to as an active capacitive stylus.

[0136] See also Figure 10-11 , Fig.11 for Fig.10 The electronic stylus pen 200 is an exploded schematic diagram. The electronic stylus pen 200 includes a housing 202 , a second circuit board assembly 203 , a first battery 204 , a second charging coil 205 and a second magnetic attraction member 206 .

[0137] Understandably, understandably, Fig.10 , Fig.11 The following related figures only schematically illustrate some components of the electronic stylus 200, and the actual shapes, sizes, positions and structures of these components are not subject to the present invention. Fig.10 , Fig.11For example, according to actual needs, in other embodiments, the electronic stylus 200 may also include a microphone, a speaker, an audio generator, a vibrator, a camera, a data port and other devices.

[0138] See also Figure 10-11 The housing 202 includes a pen holder 2021, a pen tip 2022 and a back cover 2023. The pen holder 2021 is in a long strip shape. Fig.11 The pen holder 2021 includes a Fig.10 and Fig.11 The pen holder 2021 is hollow inside to form a receiving space, and the second circuit board assembly 203, the first battery 204, the second charging coil 205, etc. are arranged in the receiving space. The material of the pen holder 2021 includes but is not limited to metal or plastic.

[0139] To facilitate the user to hold the electronic stylus pen 200, please refer to Figure 10-11 , the outer circumference of the pen holder 2021 includes a first plane 2021c. In this embodiment, there is one first plane 2021c, and the pen holder 2021 also includes a first curved surface 2021d, and the outer circumference of the pen holder 2021 is formed by the first plane 2021c and the first curved surface 2021d. It can be understood that in other embodiments, there can be multiple first planes 2021c, and the multiple first planes 2021c can be arranged in the circumferential direction of the pen housing.

[0140] See also Fig.10 and Fig.11 The pen tip 2022 is disposed at the first end 2021a of the pen shaft 2021. The pen tip 2022 is used to cooperate with the contact surface (such as a touch screen) outside the electronic stylus 200. Fig.11 The pen tip 2022 includes a writing end 2022a and a connecting end 2022b that are arranged opposite to each other. When the user holds the electronic stylus 200, the writing end 2022a of the pen tip 2022 can be used to contact the touch screen and input information to the touch screen. The writing end 2022a of the pen tip 2022 can be set to a spherical arc surface to improve the smoothness of the sliding of the pen tip 2022.

[0141] The rear cover 2023 is disposed at the second end 2021b of the pen body 2021. The rear cover 2023 and the pen body 2021 can be connected by plugging, snapping, threading, bonding, etc. It can be understood that in other embodiments, the rear cover 2023 and the pen body 2021 can also be an integrated structure. Alternatively, in some other embodiments, the rear cover 2023 can also be replaced by the pen tip 2022. In this case, the electronic stylus 200 is a double-tip electronic stylus.

[0142] See also Fig.11 The second circuit board assembly 203 includes a second circuit board 2031 and a second electronic component 2032. The second circuit board 2031 is used to integrate the second electronic component 2032. The second circuit board 2031 can be used to realize the electrical connection between the various second electronic components 2032 inside the electronic stylus 200, and the second circuit board 2031 can be used to perform signal control, data signal processing and other operations on the second electronic component 2032. The second circuit board 2031 includes but is not limited to a printed circuit board (PCB). The second circuit board 2031 can be a hard circuit board, a flexible circuit board or a hard-soft circuit board. The second circuit board 2031 can be fixed in the housing 202 by gluing, clamping, welding and the like.

[0143] The second electronic component 2032 includes but is not limited to a second processor, a second wireless communication module, a wireless receiving chip (also referred to as an Rx chip), etc. Among them, the second processor may include a storage and processing circuit for supporting the operation of the electronic stylus 200. The storage and processing circuit may include a storage device such as a non-volatile memory (e.g., a flash memory or other electrically programmable read-only memory configured as a solid-state drive), a volatile memory (e.g., a static or dynamic random access memory), etc. The processing circuit in the second processor may be used to control the operation of the electronic stylus 200. The processing circuit may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio chips, application-specific integrated circuits, etc.

[0144] The second wireless communication module is used to support data exchange between the electronic stylus 200 and the electronic device and the wireless charging base 300, including wireless communications such as Bluetooth (BT), global navigation satellite system (GNSS), wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), frequency modulation (FM), nearfield communication technology (NFC), infrared technology (IR), etc.

[0145] In some embodiments, the second wireless communication module may include a Bluetooth chip. The electronic stylus 200 may be paired with the Bluetooth chip of the electronic device, the wireless charging base 300, etc. through the Bluetooth chip and establish a wireless connection to realize wireless communication between the electronic stylus 200 and the electronic device and the wireless charging base 300 through the wireless connection. In addition, the second wireless communication module may also include an antenna, and the second wireless communication module receives electromagnetic waves via the antenna, modulates the electromagnetic wave signal and filters it, and sends the processed signal to the second processor. The second wireless communication module can also receive the signal to be sent from the second processor, modulate the frequency of it, amplify it, and convert it into electromagnetic waves for radiation through the antenna.

[0146] The first battery 204 is used to provide power to the second circuit board 2031. The first battery 204 may include but is not limited to a nickel-cadmium battery, a nickel-metal hydride battery, a lithium battery, an alkaline battery, or other types of batteries. In addition, the number of the first battery 204 in the embodiment of the present application may be multiple or one.

[0147] The second charging coil 205 can be coupled with the first charging coil 303 of the wireless charging base 300 to generate an induced current to achieve the transmission of electric energy. The second charging coil 205 is disposed in the housing 202. Specifically, the second charging coil 205 can be disposed in the pen holder 2021, and the second charging coil 205 can be electrically connected to the second circuit board 2031.

[0148] See also Fig.12 , Fig.12 for Fig.11 The second charging coil 205 of the electronic stylus 200 is a three-dimensional diagram. The second charging coil 205 is a solenoid coil with a magnetic core, which can also be called a magnetic bar coil. Specifically, the second charging coil 205 includes a magnetic core 2051 and a second coil body 2052 wound around the magnetic core 2051.

[0149] The magnetic core 2051 is used to gather magnetic lines of force and improve the energy transmission efficiency. In order to reduce the loss of the magnetic core 2051, the magnetic core 2051 can be made of soft magnetic material. The material of the magnetic core 2051 can be designed with reference to the material of the first magnetic conductive plate 3031, and will not be described in detail here. Fig.11 and Fig.12 , the magnetic core 2051 is in a long strip shape. When the second charging coil 205 is assembled into the housing 202 of the electronic stylus 200, the length direction of the magnetic core 2051 (for example Fig.12 e2 direction in the figure) can be aligned with the length direction of the housing 202 (e.g. Fig.10 The direction of e1 in is consistent.

[0150] The second coil body 2052 is wound around the outer circumference of the magnetic core 2051. The second coil body 2052 may be in a solenoid shape. The second coil body 2052 may be wound around the outer circumference of the magnetic core 2051 along the length direction of the magnetic core 2051 by a conductive wire. The conductive wire may be a metal wire such as a copper wire, an aluminum wire, or a gold wire, or may be an enameled wire.

[0151] In order to improve the coupling coefficient between the first charging coil 303 and the second charging coil 205, the wireless charging base 300 can charge the electronic stylus 200. Figure 8 The wireless charging base 300 also includes a first magnetic element 305. Fig.11 The electronic stylus pen 200 further includes a second magnetic member 206, and the first magnetic member 305 can be magnetically matched with the second magnetic member 206. The second magnetic member 206 and the second charging coil 205 can be arranged in the length direction of the electronic stylus pen 200.

[0152] See also Fig.13 , Fig.13 for Figure 6 The schematic diagram of the wireless charging base 300 in the wireless charging system 1000 wirelessly charging the electronic stylus 200 is shown. The first magnetic member 305 and the second magnetic member 206 are configured so that when the first magnetic member 305 and the second magnetic member 206 are magnetically matched, the orthographic projection of the second charging coil 205 on the first surface 3031a of the first magnetic conductive plate 3031 overlaps with the orthographic projection of the first coil body 3032 on the first surface 3031a of the first magnetic conductive plate 3031.

[0153] See also Fig.14 and Fig.15a , Fig.14 for Figure 6 In the wireless charging system 1000 shown in the figure, when the wireless charging base 300 performs wireless charging on the electronic stylus 200, the positional relationship diagram of the first charging coil 303, the first magnetic element 305, the second charging coil 205, and the second magnetic element 206 is shown, Fig.15a for Fig.14 The top view of the position relationship diagram shown in FIG. Fig.15a The top view shown is a schematic diagram from the electronic stylus 200 side to the wireless charging base 300 side. Specifically, the orthographic projection of the first coil body 3032 on the first surface 3031a of the first magnetic conductive plate 3031 is the first projection, and the orthographic projection of the second charging coil 205 on the first surface 3031a of the first magnetic conductive plate 3031 is the second projection, and the first projection overlaps the second projection.

[0154] In this way, the charging position of the electronic stylus 200 can be positioned by the magnetic attraction of the first magnetic member 305 and the second magnetic member 206, so that the first charging coil 303 and the second charging coil 205 have a good coupling state, and the wireless charging base 300 can stably charge the electronic stylus 200.

[0155] Therefore, the wireless charging base 300 in the embodiment of the present application can not only be used to wirelessly charge electronic devices such as tablet computers and mobile phones, but also can be used to wirelessly charge the electronic stylus 200, which can expand the functions of the wireless charging base 300 and the charging scenarios of the electronic stylus 200, and can improve the convenience of charging the electronic stylus 200.

[0156] In some embodiments, in order to increase the coupling coefficient between the first charging coil 303 and the second charging coil 205, refer to Fig.15a The first coil body 3032 includes a first extension segment 3032 g , and the first extension segment 3032 g is located on the annular extension path of the first coil body 3032 .

[0157] The orthographic projection of the second coil body 2052 on the first surface 3031a overlaps with the orthographic projection of the first extension section 3032g on the first surface 3031a. Fig.15a In the example shown, the first extension section 3032g is covered by the second charging coil 205, and thus the first extension section 3032g is indicated by a dotted line.

[0158] The extension direction of the central axis P1 of the second coil body 2052 is the first direction, and the extension direction of the first extension section 3032g is the second direction, and the first direction is different from the second direction. Fig.15a In the example shown, the first direction extends in the horizontal direction, the first extension segment is a straight line segment, and the extension direction of the first extension segment 3032g is the vertical direction.

[0159] See also Fig.15b , Fig.15b for Fig.13 Schematic diagram of the induced magnetic field generated by the first charging coil 303 of the wireless charging system shown. Since the first direction is different from the second direction, the magnetic lines of force in the induced magnetic field H generated by the first charging coil 303 can pass through the second coil body 2052 along the first direction to generate an induced current on the second coil body 2052 to charge the electronic stylus 200. That is, the magnetic lines of force in the induced magnetic field H generated by the first charging coil 303 include magnetic lines of force extending along the first direction and / or include magnetic lines of force having a component extending along the first direction.

[0160] On this basis, in order to enable more magnetic lines of force to pass through the second coil body 2052 along the first direction, please refer to Fig.15a , the first extension section 3032g includes a straight line segment, and the angle between the first direction and the second direction is greater than or equal to 60 degrees and less than or equal to 120 degrees. Exemplarily, the angle between the first direction and the second direction can be 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, 85 degrees, 90 degrees, 95 degrees, 100 degrees, 110 degrees, 115 degrees, 120 degrees, etc. In this way, the coupling coefficient between the first charging coil 303 and the second charging coil 205 can be guaranteed, which is conducive to improving the charging efficiency of the wireless charging base 300 for the electronic stylus 200.

[0161] In other embodiments, when the first extension segment 3032g includes an arc segment, the angle between the first direction and the tangent of the first extension segment 3032g is greater than or equal to 60 degrees and less than or equal to 120 degrees. Exemplarily, the angle between the first direction and the tangent of the first extension segment 3032g can be 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, 85 degrees, 90 degrees, 95 degrees, 100 degrees, 110 degrees, 115 degrees, 120 degrees, etc. In this way, more magnetic lines of force can also pass through the second coil body 2052 along the first direction, so as to ensure the coupling coefficient between the first charging coil 303 and the second charging coil 205, and improve the charging efficiency of the wireless charging base 300 for the electronic stylus 200.

[0162] See also Fig.14 , the central axis P1 of the second coil body 2052 intersects with the central axis P2 of the through hole 3032a. That is, when the first extension section 3032g includes a straight line segment, the angle between the extension direction (that is, the first direction) of the central axis P1 of the second coil body 2052 and the extension direction of the first extension section 3032g is 90 degrees. When the first extension section 3032g includes an arc segment, the angle between the extension direction (that is, the first direction) of the central axis P1 of the second coil body and the tangent of the first extension section is 90 degrees. In this way, the number of magnetic lines of force passing through the second coil body 2052 along the first direction can be further increased, thereby further increasing the coupling coefficient between the first charging coil 303 and the second charging coil 205, and improving the charging efficiency.

[0163] In some embodiments, when the first charging coil 303 is in operation, the magnetic field strength in the area corresponding to the first coil body 3032 may be uneven. Fig.14 and Fig.15aThe first coil body 3032 includes an outer coil 3032b, a middle coil 3032c and an inner coil 3032d arranged in sequence in the radial direction of the first coil body 3032, wherein the outer coil 3032b is located on the side of the middle coil 3032c away from the through hole 3032a, and the inner coil 3032d is located on the side of the middle coil 3032c close to the through hole 3032a. The number of turns of the outer coil 3032b, the middle coil 3032c and the inner coil 3032d can be one turn or more turns, and the number of turns of the outer coil 3032b, the number of turns of the middle coil 3032c and the number of turns of the inner coil 3032d can be the same or different.

[0164] The magnetic field strength in the area where the outer coil 3032b is located is the first strength, the magnetic field strength in the area where the middle coil 3032c is located is the second strength, and the magnetic field strength in the area where the inner coil 3032d is located is the third strength, the second strength is greater than or equal to the first strength, and the second strength is greater than or equal to the third strength. The orthographic projection of the second charging coil 205 on the first magnetic conductive plate 3031 overlaps with the orthographic projection of the middle coil 3032c on the first surface 3031a of the first magnetic conductive plate 3031. In this way, it can be ensured that the area where the first coil body 3032 and the second charging coil 205 are aligned has a higher magnetic field strength, and the number of magnetic induction lines passing through the second coil body 2052 along the first direction can be ensured, thereby improving the charging efficiency of the electronic stylus 200.

[0165] On this basis, please continue to refer to Fig.15a , the orthographic projection of the second charging coil 205 on the first surface 3031a overlaps with the orthographic projection of the outer coil 3032b on the first surface 3031a, and the orthographic projection of the second charging coil 205 on the first surface 3031a overlaps with the orthographic projection of the inner coil 3032d on the first surface 3031a. In this way, during the charging process, the uniformity and symmetry of the magnetic field environment in which the second charging coil 205 is located can be ensured, and it is helpful to increase the overlapping area of ​​the orthographic projection of the second charging coil 205 on the first surface 3031a and the orthographic projection of the first coil body 3032 on the first surface 3031a, which can further increase the number of magnetic induction lines passing through the second coil body 2052 along the first direction, thereby helping to further improve the charging efficiency.

[0166] In some embodiments, see Fig.14, the magnetic core 2051 includes a first end face 2051a and a second end face 2051b opposite to each other in the axial direction thereof, and the first coil body 3032 includes a first inner peripheral surface 3032e and a first outer peripheral surface 3032f opposite to each other, and the first inner peripheral surface 3032e is located on the side of the first outer peripheral surface 3032f close to the through hole 3032a. When the first magnetic attraction member 305 and the second magnetic attraction member 206 are magnetically matched, the first end face 2051a of the magnetic core 2051 is located on the side of the first inner peripheral surface 3032e close to the through hole 3032a, and the second end face 2051b of the magnetic core 2051 is located on the side of the first outer peripheral surface 3032f away from the through hole 3032a. That is, the length of the magnetic core 2051 is greater than the width of the first coil body 3032. Among them, the length of the magnetic core 2051 in the embodiment of the present application refers to the size of the magnetic core 2051 in the direction from the first end face 2051a to the second end face 2051b, and the width of the first coil body 3032 can be the distance between the first inner peripheral surface 3032e and the first outer peripheral surface 3032f. In this way, the overlapping area between the second charging coil 205 and the first coil body 3032 can be increased, which is conducive to increasing the number of magnetic induction lines passing through the second coil body 2052 along the first direction, thereby increasing the coupling coefficient between the first charging coil 303 and the second charging coil 205, and improving the charging efficiency.

[0167] For example, see Fig.15a In this embodiment, the through hole 3032a of the first coil body 3032 is roughly square, and the extension path of the first coil body 3032 is roughly square ring. The side length a1 of the first inner circumference 3032e of the first coil body 3032 is 19mm, that is, the side length of the through hole 3032a is 19mm, the side length a2 of the first outer circumference 3032f is 48mm, and the width of the first coil body 3032 is 14.5mm. The length L1 of the magnetic core 2051 is 16mm. Among them, the calculation formula of the width of the first coil body 3032 is: (side length a2 of the first outer circumference 3032f-side length a1 of the first inner circumference 3032e) / 2.

[0168] It can be understood that, in other embodiments, the length L1 of the magnetic core 2051 may also be less than or equal to the width of the first coil body 3032. In this case, the orthographic projection of the second charging coil 205 on the first magnetic conductive plate 3031 may be entirely located on the orthographic projection of the first coil body 3032 on the first magnetic conductive plate 3031. Specifically, the first end 2021a surface and the second end 2021b surface of the magnetic core 2051 are both located between the first inner peripheral surface 3032e and the first outer peripheral surface 3032f.

[0169] On the basis of any of the above embodiments, in order to further ensure the uniformity and symmetry of the magnetic field environment of the second charging coil 205, please continue to refer to Fig.15a , the spacing between the first end face 2051a and the first inner circumferential surface 3032e is the first spacing d1, the spacing between the second end face 2051b and the first outer circumferential surface 3032f is the second spacing d2, and the difference between the first spacing d1 and the second spacing d2 is greater than or equal to -2mm and less than or equal to 2mm. That is, -2mm≤d1-d2≤2mm. Exemplarily, the difference between the first spacing d1 and the second spacing d2 can be -2mm, -1.5mm, -1.2mm, -1mm, -0.8mm, -0.5mm, -0.3mm, -0.2mm, 0mm, 0.2mm, 0.3mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 2mm.

[0170] In some embodiments, in order to further increase the coupling coefficient between the first charging coil 303 and the second charging coil 205, refer to Fig.16 , Fig.16 for Fig.13 The schematic diagram of the wireless charging base 300 in the wireless charging system 1000 shown in the figure wirelessly charges the electronic stylus 200. When the first magnetic member 305 and the second magnetic member 206 are magnetically matched, the spacing between the first coil body 3032 and the second coil body 2052 is the third spacing d3, and the third spacing d3 is less than or equal to 3mm. On this basis, in order to reduce the processing difficulty of the wireless charging base 300 and the electronic stylus 200, the third spacing d3 is greater than or equal to 1mm. Exemplarily, the third spacing d3 between the first coil body 3032 and the second coil body 2052 is 3mm, 2.8mm, 2.5mm, 2.2mm, 2mm, 1.8mm, 1.5mm, 1.2mm, 1mm, etc.

[0171] In this way, while ensuring a large coupling coefficient between the first charging coil 303 and the second charging coil 205 , the processing difficulty of the wireless charging base 300 and the electronic stylus 200 can be reduced, the engineering feasibility is strong, and it is beneficial to reduce the thickness of the wireless charging base 300 and the outer diameter of the electronic stylus 200 .

[0172] Furthermore, the third distance d3 may be less than or equal to 1 mm and less than or equal to 2 mm. In this way, the coupling coefficient between the first charging coil 303 and the second charging coil 205 can be further increased while ensuring the engineering feasibility of the wireless charging system 1000 .

[0173] In some embodiments, see Fig.17 , Fig.17 for Fig.16An enlarged view of the middle A area. The minimum spacing between the first coil body 3032 and the outer surface of the top plate 3021 is the fourth spacing d4, and the fourth spacing d4 is less than or equal to 2 mm. Among them, the minimum spacing between the first coil body 3032 and the outer surface of the top plate 3021 refers to the minimum value of the spacing between the first coil body 3032 and the outer surface of the top plate 3021. Exemplarily, the fourth spacing d4 can be 2mm, 1.8mm, 1.6mm, 1.7mm, 1.5mm, 1.2mm, 1mm, 0.8mm, 0.77mm, 0.7mm, etc. In this way, it is beneficial to reduce the spacing between the first charging coil 303 and the second charging coil 205, and it is beneficial to reduce the thickness of the wireless charging base 300, realize the lightweight design of the wireless charging base 300, and facilitate the storage and carrying of the wireless charging base 300.

[0174] Please continue reading Fig.17 , the minimum spacing between the second coil body 2052 and the outer circumference of the pen holder 2021 is the fifth spacing d5, and the fifth spacing d5 is less than or equal to 1 mm. Among them, the minimum spacing between the second coil body 2052 and the outer circumference of the pen holder 2021 refers to the minimum value of the spacing between the second coil body 2052 and the outer circumference of the pen holder 2021. Exemplarily, the fifth spacing d5 can be 1 mm, 0.9 mm, 0.8 mm, 0.77 mm, 0.7 mm, 0.6 mm, 0.5 mm, etc. In this way, it is beneficial to reduce the spacing between the first charging coil 303 and the second charging coil 205, and it is beneficial to reduce the radial dimension of the outer circumference of the electronic stylus 200, so that the user can hold the electronic stylus 200 more easily.

[0175] In some embodiments, see Figure 13-Figure 16 , the first magnetic attraction member 305 is disposed on the first magnetic conductive plate 3031. For example, please refer to Fig.13 and Fig.15a The first magnetic member 305 can be fixedly connected to the first surface 3031a of the first magnetic conductive plate 3031 by bonding, clamping, etc. Specifically, the first magnetic member 305 can be disposed in the through hole 3032a of the first coil body 3032.

[0176] In this way, by setting the first magnetic member 305 in the through hole 3032a, on the one hand, the first magnetic member 305 can be surrounded by the first coil body 3032, and the second charging coil 205 can be made to overlap with the orthographic projection of the first coil body 3032 on the first surface 3031a of the first magnetic conductive plate 3031, whether the second charging coil 205 is located on the side of the second magnetic member 206 close to the pen tip 2022 or on the side of the second magnetic member 206 close to the back cover 2023, so that the orthographic projection of the second charging coil 205 on the first surface 3031a of the first magnetic conductive plate 3031 can be realized. The first charging coil 303 is coupled with the second charging coil 205; on the other hand, the space in the middle of the first coil body 3032 can be fully utilized to make the structure of the wireless charging base 300 more compact, which is beneficial to reducing the overall volume of the wireless charging base 300 and realizing the miniaturized design of the wireless charging base 300; on the other hand, the magnetic field strength in the through hole 3032a of the first coil body 3032 is relatively low (that is, the magnetic induction density is relatively low), and the first magnetic attraction component 305 is arranged in the through hole 3032a, which can reduce the interference of the first magnetic attraction component 305 on the induced magnetic field.

[0177] It is understandable that in other embodiments, the first magnetic member 305 can also be fixed on the inner surface or outer surface of the top plate 3021. The "inner surface of the top plate 3021" refers to the side surface of the top plate 3021 facing the inner space of the housing 302.

[0178] In some embodiments, see Figure 14-16 , the first magnetic member 305 is in the shape of a long strip. The length direction of the first magnetic member 305 can be any direction parallel to the first surface 3031a of the first magnetic conductive plate 3031. Exemplarily, the first magnetic member 305 can be in the shape of a rectangular parallelepiped. In this way, it is beneficial to increase the volume of the first magnetic member 305, thereby facilitating an increase in the magnetic attraction between the first magnetic member 305 and the second magnetic member 206, which can improve the position stability of the electronic stylus 200 during the charging process, thereby improving the stability of the charging process.

[0179] The first magnetic attraction member 305 may be a permanent magnet or an electromagnet. Fig.18 , Fig.18 for Figure 7 Another schematic diagram of the wireless charging base 300 is shown. There is a gap between the first magnetic member 305 and the first coil body 3032. That is, the first magnetic member 305 is spaced apart from the first coil body 3032. In this way, the first magnetic member 305 can be prevented from interfering with the induced magnetic field between the first charging coil 303 and the second charging coil 205, thereby ensuring charging stability and charging efficiency.

[0180] In some embodiments, see Fig.18 , the distance between the first magnetic member 305 and the first coil body 3032 is the sixth distance d6, and the sixth distance d6 is greater than or equal to 3 mm. In this embodiment, the first magnetic member 305 is located in the through hole 3032a, and the sixth distance d6 refers to the distance between the first magnetic member 305 and the first inner circumferential surface 3032e of the first coil body 3032. In this way, the interference of the first magnetic member 305 on the induced magnetic field can be avoided.

[0181] On this basis, in order to take into account the distance between the first magnetic member 305 and the first coil body 3032 and the length of the first magnetic member 305, the sixth distance d6 between the first magnetic member 305 and the first coil body 3032 can be less than or equal to 5mm. Exemplarily, the sixth distance d6 can be 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, 4.5mm, 5mm, etc. In this way, on the one hand, it can avoid the first magnetic member 305 from interfering with the induced magnetic field between the first charging coil 303 and the second charging coil 205, and on the other hand, it is conducive to increasing the length of the first magnetic member 305 and ensuring the volume of the first magnetic member 305, thereby ensuring the magnetic attraction between the first magnetic member 305 and the second magnetic member 206.

[0182] In some embodiments, see Fig.18 , the orthographic projection of the center of the first magnetic member 305 on the first surface 3031a covers the orthographic projection of the center O1 of the through hole 3032a on the first surface 3031a. Since the magnetic induction density at the through hole 3032a is the lowest, the orthographic projection of the center O1 of the first magnetic member 305 on the first surface 3031a covers the orthographic projection of the center O1 of the through hole 3032a on the first surface 3031a, which can reduce the interference of the first magnetic member 305 on the induced magnetic field.

[0183] In some embodiments, the orthographic projection of the center Q1 of the first magnetic member 305 on the first surface 3031a coincides with the orthographic projection of the center O1 of the through hole 3032a on the first surface 3031a. That is, the center Q1 of the first magnetic member 305 is aligned with the center O1 of the through hole 3032a. In this way, it is beneficial to increase the distance between the first magnetic member 305 and the first coil body 3032, and at the same time, it is beneficial to increase the length of the first magnetic member 305. In addition, the magnetic induction density at the through hole 3032a is the lowest. Setting the center Q1 of the first magnetic member 305 to coincide with the center O1 of the through hole 3032a can further reduce the interference of the first magnetic member 305 on the induced magnetic field.

[0184] For example, see Fig.18In this embodiment, the side length of the through hole 3032a (that is, the side length a1 of the first inner circumferential surface 3032e) is 19 mm, and the length L2 of the first magnetic component 305 is 12 mm. After setting the center Q1 of the first magnetic component 305 to coincide with the center O1 of the through hole 3032a, it can be ensured that the distance between the first magnetic component 305 and the first coil body 3032 is at least 3.5 mm, which can meet the requirement that the distance between the first magnetic component 305 and the first coil body 3032 is greater than or equal to 3 mm.

[0185] On the basis of any of the above embodiments, the first magnetic member 305 and the second magnetic member 206 are both Halbach array magnets. The Halbach array magnet can gather magnetic lines of force on one side of the magnet and weaken the magnetic lines of force on the other side by arranging magnets with different magnetization directions according to a certain rule, thereby obtaining a relatively ideal unilateral magnetic field. In this way, by setting the first magnetic member 305 and the second magnetic member 206 as Halbach array magnets, the magnetic attraction between the first magnetic member 305 and the second magnetic member 206 can be improved, which is conducive to improving the adsorption reliability between the wireless charging base 300 and the electronic stylus 200.

[0186] For details, please refer to Fig.16 , the first magnetic attraction member 305 includes a first magnetic part 3051, a second magnetic part 3052 and a third magnetic part 3053. The first magnetic part 3051, the second magnetic part 3052 and the third magnetic part 3053 are arranged in sequence in the third direction. The third direction is parallel to the first surface 3031a of the first magnetic conductive plate 3031. The magnetizing direction of the first magnetic part 3051 is perpendicular to the first surface 3031a. The magnetizing direction of the second magnetic part 3052 is perpendicular to the magnetizing direction of the first magnetic part 3051, and the magnetizing direction of the third magnetic part 3053 is opposite to the magnetizing direction of the first magnetic part 3051. Among them, the magnetic pole of one end of the second magnetic part 3052 facing the first magnetic part 3051 is the same as the magnetic pole of one end of the first magnetic part 3051 facing away from the first magnetic conductive plate 3031.

[0187] For example, see Fig.16 , the magnetic pole of the end of the first magnetic portion 3051 facing the first magnetic conductive plate 3031 can be an N pole, and the magnetic pole of the end of the first magnetic portion 3051 facing away from the first magnetic conductive plate 3031 can be an S pole. In this case, the magnetic pole of the end of the second magnetic portion 3052 facing the first magnetic portion 3051 is an S pole, and the magnetic pole of the end of the second magnetic portion 3052 facing the third magnetic portion 3053 is an N pole. The magnetic pole of the end of the third magnetic portion 3053 facing the first magnetic conductive plate 3031 is an S pole, and the magnetic pole of the end of the third magnetic portion 3053 facing away from the first magnetic conductive plate 3031 is an N pole.

[0188] Please continue reading Fig.16, the second magnetic member 206 includes a fourth magnetic portion 2061, a fifth magnetic portion 2062 and a sixth magnetic portion 2063. The fourth magnetic portion 2061, the fifth magnetic portion 2062 and the sixth magnetic portion 2063 are arranged in sequence in the length direction of the electronic stylus 200. The fourth magnetic portion 2061 is used for magnetically cooperating with the first magnetic portion 3051, and the sixth magnetic portion 2063 is used for magnetically cooperating with the third magnetic portion 3053. The magnetizing direction of the fifth magnetic portion 2062 is perpendicular to the magnetizing direction of the fourth magnetic portion 2061, and the magnetic pole of one end of the fifth magnetic portion 2062 close to the fourth magnetic portion 2061 is the same as the magnetic pole of one end of the fourth magnetic portion 2061 facing the first magnetic portion 3051.

[0189] For example, see Fig.16 When the electronic stylus 200 is adsorbed on the wireless charging seat, the magnetization direction of the fourth magnetic portion 2061 is opposite to the magnetization direction of the first magnetic portion 3051 , the magnetization direction of the sixth magnetic portion 2063 is opposite to the magnetization direction of the fourth magnetic portion 2061 , and the magnetization direction of the fifth magnetic portion 2062 is opposite to the magnetization direction of the second magnetic portion 3052 .

[0190] It is understandable that in other embodiments, the first magnetic member 305 and the second magnetic member 206 may also be a single magnet.

[0191] In some embodiments, the second magnetic element 206 can be arranged opposite to the first plane 2021c of the pen housing, and the electronic stylus 200 can be supported on the wireless charging base 300 by means of the first plane 2021c of the pen housing. In this way, the contact area between the electronic stylus 200 and the wireless charging base 300 can be increased, the adsorption stability between the electronic stylus 200 and the wireless charging base 300 can be improved, and the distance between the first charging coil 303 and the second charging coil 205 can be reduced.

[0192] In order to reduce the difficulty of positioning the electronic stylus 200 and the wireless charging base 300, please refer to Fig.16 There are two second magnetic members 206, and the two second magnetic members 206 are respectively arranged on both sides of the second charging coil 205. In this way, any one of the two second magnetic members 206 can cooperate with the first magnetic member 305 to achieve the positioning of the electronic stylus 200, expand the charging scene of the electronic stylus 200 through the wireless charging base 300, and improve the probability of successful alignment between the electronic stylus 200 and the wireless charging base 300, thereby reducing the difficulty of positioning between the electronic stylus 200 and the wireless charging base 300.

[0193] In some embodiments, the two second magnetic elements 206 are symmetrically arranged relative to the second charging coil 205. Thus, when the electronic stylus 200 is adsorbed on the wireless charging base 300 along the first orientation, one of the second magnetic elements 206 can be magnetically matched with the first magnetic element 305, and when the electronic stylus 200 is adsorbed on the wireless charging base 300 along the second orientation, the other second magnetic element 206 can be magnetically matched with the first magnetic element 305. The first orientation is opposite to the second orientation.

[0194] Specifically, when the electronic stylus pen 200 is attached to the wireless charging base 300 in the first orientation and the second orientation, the orientations of the pen tip 2022 of the electronic stylus pen 200 are opposite. That is, the orientations of the first end 2021a of the pen shaft 2021 are opposite. Fig.16 In the example shown, the electronic stylus 200 is adsorbed on the wireless charging base 300 in a first orientation, and the second magnetic member 206 away from the pen tip 2022 of the two second magnetic members 206 is magnetically matched with the first magnetic member 305, and the pen tip 2022 of the electronic stylus 200 is facing right. Fig.19a and Fig.19b , Fig.19a for Figure 6 FIG. 1 is a schematic diagram of another charging scenario of the wireless charging system 1000. Fig.19b for Fig.19a Another schematic diagram of the charging scenario is shown. Fig.19a and Fig.19b In the example shown, the electronic stylus 200 is adsorbed on the wireless charging base 300 in the second orientation, and the second magnetic element 206 close to the pen tip 2022 of the two second magnetic elements 206 is magnetically matched with the first magnetic element 305, and the pen tip 2022 of the electronic stylus 200 is facing left.

[0195] It is understandable that in other embodiments, the electronic stylus 200 may be adsorbed on the wireless charging base 300 in a first orientation with the tip 2022 of the electronic stylus 200 facing left, or the electronic stylus 200 may be adsorbed on the wireless charging base 300 in a second orientation with the tip 2022 of the electronic stylus 200 facing right.

[0196] In this way, no matter the electronic stylus 200 is adsorbed on the wireless charging base 300 in the first orientation or in the second orientation, the coupling of the first charging coil 303 and the second charging coil 205 can be achieved, so that the wireless charging base 300 can stably charge the electronic stylus 200, thereby expanding the charging scenario of the electronic stylus 200 and improving the charging convenience of the electronic stylus 200.

[0197] Furthermore, since the two second magnetic elements 206 are symmetrically arranged relative to the second charging coil 205, the distances between different second magnetic elements 206 and the second charging coil 205 are equal. Fig.19b , the distance between the second magnetic member 206 near the pen tip 2022 and the second charging coil 205 is the seventh distance d7, the distance between the second magnetic member 206 far from the pen tip 2022 and the second charging coil 205 is the eighth distance d8, and the seventh distance d7 is equal to the eighth distance d8. That is, the symmetry axis of the two second magnetic members 206 passes through the center of the second charging coil 205. In this way, when the electronic stylus 200 is adsorbed on the wireless charging base 300 in the second orientation, the overlapping area of ​​the first projection (that is, the orthographic projection of the first coil body 3032 on the first magnetic conductive plate 3031) and the second projection (that is, the orthographic projection of the second charging coil 205 on the first magnetic conductive plate 3031) can be substantially the same as the overlapping area of ​​the first projection and the second projection when the electronic stylus 200 is adsorbed on the wireless charging base 300 in the first orientation, thereby ensuring that the electronic stylus 200 has the same coupling coefficient in the above two different charging scenarios, and ensuring the charging efficiency.

[0198] On the basis of any of the above embodiments, in order to facilitate the user to understand the charging status of the electronic stylus 200, the wireless charging base 300 also includes an indicator light (not shown), which is electrically connected to the first circuit board 3041. The indicator light indicates that the wireless charging is in different working states by displaying different colors. For example, when the indicator light displays the first color, it means that the wireless charging system 1000 is in a charging state. When the indicator light displays the second color, it means that the electronic device 400 and the electronic stylus 200 are placed off-center or blocked by foreign objects and cannot be charged normally. When the indicator light displays the third color, it means that the electronic device 400 such as a mobile phone or a tablet computer and the electronic stylus 200 have been fully charged. Among them, the first color, the second color and the third color are different colors. For example, the first color can be green, the second color can be red, and the third color can be yellow.

[0199] In this way, by providing an indicator light on the wireless charging base 300 , the user can promptly and clearly understand the working status of the wireless charging system 1000 through the display of the indicator light, thereby improving the user experience.

[0200] It is understandable that in other embodiments, the wireless charging system 1000 can also remind the user of the charging status of the electronic stylus 200 in other ways. For example, in other embodiments, the wireless charging base 300 can also remind the user of the charging status through a voice prompt module. For example, the voice prompt module can issue a voice message of "charging completed" or "current power is xx%" according to the charging status of the electronic stylus 200. For example, in some other embodiments, the electronic stylus 200 can send information about the power status of the electronic stylus 200 to an electronic device that can wirelessly communicate with it, and output a prompt message on the electronic device. The prompt message can be a pop-up message, a voice message, etc.

[0201] See also Fig. 20 , Fig. 20 A simulation relationship diagram of the distance of the center of the second charging coil 205 from the center of the through hole 3032a and the coupling coefficient between the first charging coil 303 and the second charging coil 205 provided in some embodiments of the present application. The relationship diagram can be obtained by simulating the electromagnetic field between the first charging coil 303 and the second charging coil 205 through simulation software. During the simulation test, the spacing between the first coil body 3032 and the second coil body 2052 is set to 3mm, and the central axis P1 of the second coil body 2052 is ensured to intersect with the central axis P2 of the through hole 3032a.

[0202] For convenience of explaining the distance of the center of the second charging coil 205 from the center of the through hole 3032a, please refer to Figure 21-22 , Fig.21 This is a schematic diagram of the positional relationship between the first charging coil 303 and the second charging coil 205 provided in some embodiments of the present application. Fig. 22 Another schematic diagram of the positional relationship between the first charging coil 303 and the second charging coil 205 provided in some embodiments of the present application. Fig.21 and Fig. 22 As shown, the center of the through hole 3032a is O1, the center of the second charging coil 205 is O2, and the distance d that the center of the second charging coil 205 deviates from the center of the through hole 3032a refers to the distance between the orthographic projection of the center O1 of the through hole 3032a on the first surface 3031a of the first magnetic conductive plate 3031 and the orthographic projection of the center O2 of the second charging coil 205 on the first surface 3031a of the first magnetic conductive plate 3031.

[0203] from Fig. 20It can be seen that when the center O2 of the second charging coil 205 is aligned with the center O1 of the through hole 3032a, the coupling coefficient between the first charging coil 303 and the second charging coil 205 is the smallest, and the value of the coupling coefficient is 0 at this time, and energy cannot be transmitted between the first charging coil 303 and the second charging coil 205. That is, when the center of the second charging coil 205 is aligned with the center of the through hole 3032a, the electronic stylus 200 cannot be wirelessly charged through the wireless charging base 300.

[0204] Please continue reading Fig. 20 When the center O2 of the second charging coil 205 deviates from the center O1 of the through hole 3032a by a certain distance, the coupling coefficient between the first charging coil 303 and the second charging coil 205 increases first and then decreases. Fig.21 When the side length a1 of the first inner circumference 3032e of the first coil body 3032 is 19 mm, the side length a2 of the first outer circumference 3032f is 48 mm, and the length L1 of the second charging coil 205 is 16 mm, and the center of the second charging coil 205 deviates from the center of the through hole 3032a by about 15 mm, the coupling coefficient between the first charging coil 303 and the second charging coil 205 is the largest, and the value of the coupling coefficient is about 0.26 at this time, and energy can be transmitted between the first charging coil 303 and the second charging coil 205, so that the electronic stylus 200 can be wirelessly charged through the wireless charging base 300, and the wireless charging frequency can reach 110k~147k.

[0205] In actual products, when the spacing between the first coil body 3032 and the second coil body 2052 is set to be less than 3 mm, the value of the coupling coefficient can reach greater than 0.26. Fig. 20 Under the simulation conditions of the embodiment shown in the figure, the electromagnetic fields of the first charging coil 303 and the second charging coil 205 after the first magnetic attraction member 305 is arranged in the through hole 3032a are simulated and the results are similar to those of FIG. Fig. 20 The structures obtained in the illustrated embodiments are almost the same. That is, after the first magnetic attraction member 305 is arranged in the through hole 3032a, the coupling coefficient between the first charging coil 303 and the second charging coil 205 is hardly affected.

[0206] Therefore, the wireless charging system 1000 in the embodiment of the present application, by setting a first magnetic component 305 on the wireless charging base 300 and setting a second magnetic component 206 in the electronic stylus 200 for magnetically cooperating with the first magnetic component 305, can achieve the positioning of the charging position of the electronic stylus 200 through the magnetic cooperation of the first magnetic component 305 and the second magnetic component 206, and then can wirelessly charge the electronic stylus 200 through the wireless charging base 300. In this way, the wireless charging base 300 in the embodiment of the present application can not only be used to wirelessly charge electronic devices such as mobile phones and tablet computers, but also can be used to wirelessly charge the electronic stylus 200, thereby expanding the wireless charging scenario of the electronic stylus 200. In this case, even if the electronic devices 400 such as tablet computers and mobile phones that are matched with the electronic stylus 200 do not have the function of charging the electronic stylus 200, the user does not need to purchase a special wireless charging device 100 for the electronic stylus 200, which can improve the convenience of the user in charging the electronic stylus 200 and reduce the use cost of the electronic stylus 200.

[0207] In other embodiments, in order to increase the volume of the first magnetic member 305 while taking into account the thickness of the wireless charging base 300, a thin design of the wireless charging base 300 can be achieved. Fig.23 , Fig.23 Schematic diagram of the assembly of the first charging coil 303 and the first magnetic member 305 provided in some other embodiments of the present application. The first charging coil 303 in this embodiment is different from the first charging coil 303 in the above embodiment in that a first groove 3031c is provided on the first magnetic conductive plate 3031 of the first charging coil 303 in this embodiment, and at least a portion of the first magnetic member 305 is disposed in the first groove 3031c.

[0208] For details, please refer to Fig.23, a first groove 3031c is provided on the first surface 3031a of the first magnetic conductive plate 3031, which is recessed toward the second surface 3031b. The first magnetic attraction member 305 includes a first mating surface 305a and a second mating surface 305b opposite to each other, and the first mating surface 305a is located in the first groove 3031c and faces the bottom wall of the groove of the first groove 3031c. The first mating surface 305a can be fixedly connected to the bottom wall of the groove of the first groove 3031c by bonding or the like. In this embodiment, the second mating surface 305b is located outside the first groove 3031c. That is, a part of the first magnetic attraction member 305 is located in the first groove 3031c. In this case, the size of the first magnetic attraction member 305 in the thickness direction of the first magnetic conductive plate 3031 is greater than the size of the first groove 3031c in the thickness direction of the first magnetic conductive plate 3031. Among them, the thickness direction of the first magnetic conductive plate 3031 is the same as the thickness direction of the wireless charging base 300. Specifically, the thickness direction of the first magnetic conductive plate 3031 is parallel to the direction from the first surface 3031 a of the first magnetic conductive plate 3031 to the second surface 3031 b .

[0209] It is understandable that in other embodiments, the entire first magnetic member 305 may be disposed in the first groove 3031c. In this case, the size of the first magnetic member 305 in the thickness direction of the first magnetic plate 3031 is less than or equal to the size of the first groove 3031c in the thickness direction of the first magnetic plate 3031.

[0210] In this way, by setting the first groove 3031c, the overlapping size of the first magnetic conductive plate 3031 and the first magnetic component 305 in the thickness direction of the wireless charging base 300 can be reduced, which is beneficial to reducing the thickness of the wireless charging base 300. At the same time, the thickness of the first magnetic component 305 can be increased, which is beneficial to increasing the volume of the first magnetic component 305, thereby facilitating increasing the magnetic attraction between the first magnetic component 305 and the second magnetic component 206.

[0211] In some embodiments, the second mating surface 305b of the first magnetic member 305 can be flush with the surface of the first coil body 3032 that faces away from the first magnetic conductive plate 3031. In this way, interference between the first magnetic member 305 and other components of the wireless charging base 300 can be avoided, which can reduce the difficulty of assembling the wireless charging base 300.

[0212] It can be understood that the first groove 3031c in this embodiment can be applied to the wireless charging base 300 in any embodiment of the present application.

[0213] In some other embodiments, see Figure 24-25 , Fig.24 The exploded diagram of the first charging coil 303 provided in some other embodiments of the present application is shown in FIG. Fig.25 for Fig.24 The exploded view is a schematic diagram of the assembly of the first coil body 3032 and the first magnetic conductive plate 3031. The first charging coil 303 in this embodiment is different from the first charging coil 303 in any of the above embodiments in that the first magnetic conductive plate 3031 of the first charging coil 303 in this embodiment includes a bottom plate portion 3031d, a first side plate portion 3031e, and a second side plate portion 3031f.

[0214] See also Fig.24 , the first side plate portion 3031e is arranged on a side surface of the bottom plate portion 3031d and is located on the inner circumference side of the first coil body 3032. That is, the first side plate portion 3031e is located in the through hole 3032a of the first coil body 3032. The second side plate portion 3031f is arranged on a side surface of the bottom plate portion 3031d and is located on the outer circumference side of the first coil body 3032. An annular groove may be defined between the first side plate portion 3031e, the second side plate portion 3031f and the bottom plate portion 3031d, and the first coil body 3032 is accommodated in the annular groove.

[0215] In this way, the first side plate portion 3031e can block the interference of the structure located on the inner peripheral side of the first coil body 3032 (such as the first magnetic attraction member 305, etc.) on the magnetic field of the first charging coil 303, which is conducive to reducing the distance between the first magnetic attraction member 305 and the first coil body 3032, thereby facilitating the increase of the volume of the first magnetic attraction member 305, and improving the magnetic attraction strength between the first magnetic attraction member 305 and the second magnetic attraction member 206. The second side plate portion 3031f can reduce the interference of the structure on the outer peripheral side of the first coil body 3032 (such as the side plate 3023 of the wireless charging coil 1001) on the magnetic field of the first charging coil 303, which can increase the magnetic field strength of the first charging coil 303 and help improve the charging efficiency. At the same time, the bottom plate portion 3031d, the first side plate portion 3031e, and the second side plate portion 3031f can also limit the first coil body 3032 to prevent the first coil body 3032 from being misplaced during installation or use.

[0216] In some embodiments, see Fig.24 The first side plate portion 3031e is annular, and the first side plate portion 3031e is arranged around the inner circumference of the first coil body 3032. In this way, the blocking area of ​​the first side plate portion 3031e can be increased, which is conducive to further improving the charging efficiency.

[0217] Please continue reading Fig.24, the second side plate portion 3031f may be annular. In this way, the blocking area of ​​the second side plate portion 3031f may be increased, which is conducive to further improving the charging efficiency. It is understandable that in some other embodiments, the first magnetic conductive plate 3031 may not be provided with the first side plate portion 3031f or the second side plate portion 3031f.

[0218] See also Fig.26 , Fig.26 for Fig.25 The first charging coil 303 is shown as a schematic diagram of the assembly of the housing 302 of the wireless charging base 300. Fig.26 In the Z-axis direction of the top plate 3021, the end of the first side plate 3031e away from the bottom plate 3031d and the end of the second side plate 3031f away from the bottom plate 3031d can contact the inner surface of the top plate 3021. In this way, the heights of the first side plate 3031e and the second side plate 3031f along the thickness direction of the bottom plate 3031d are relatively large, which can further increase the barrier area of ​​the first side plate 3031e and the second side plate 3031f.

[0219] In some other embodiments, the end of the first side plate portion 3031e away from the bottom plate portion 3031d and the end of the second side plate portion 3031f away from the bottom plate portion 3031d may also be spaced apart from the inner surface of the top plate 3021, which is not specifically limited here.

[0220] Based on any of the above embodiments, in order to reduce the difficulty of alignment between the electronic device 400 and the wireless charging base 300, please refer to Fig. 27 , Fig. 27 for Figure 7 The schematic diagram of the wireless charging base 300 wirelessly charging the electronic device 400 is shown. In this embodiment, the electronic device 400 is a mobile phone for illustration. In other embodiments, the electronic device 400 may also include but is not limited to a tablet computer, an e-reader, a smart wearable device, a Bluetooth headset box, etc.

[0221] See also Figure 28-Figure 29 , Fig.28 for Fig. 27 The perspective view of the electronic device 400 in the schematic diagram shown, Fig.29 for Fig.28 The stereogram is a cross-sectional view at line AA. The electronic device 400 includes a screen 401, a back shell 402, a mainboard (not shown), a second battery 404, a third charging coil 405, and a third magnetic member 406. It is understood that Figure 28-Figure 29 The following figures and the related drawings only schematically illustrate some components of the electronic device 400, and the actual shapes, sizes, positions and structures of these components are not subject to the present invention. Figure 28-Figure 29In addition, when the electronic device 400 is a device of other forms, the electronic device 400 may not include the screen 401 .

[0222] exist Fig.28 In the illustrated embodiment, the electronic device 400 is in the shape of a rectangular flat plate. It is understood that in other embodiments, the electronic device 400 may be in the shape of a circular flat plate, an elliptical flat plate, or the like.

[0223] The screen 401 is used to display images, videos, etc. Fig.29 The screen 401 includes a light-transmitting cover plate 4011 and a display screen 4012. The light-transmitting cover plate 4011 and the display screen 4012 are stacked. The light-transmitting cover plate 4011 is mainly used to protect the display screen 4012 and prevent dust.

[0224] See also Fig.28 Combined with Fig.29 , the back shell 402 includes a back cover 4021 and a frame 4022. The back cover 4021 is located on the side of the display screen 4012 away from the light-transmitting cover plate 4011. The frame 4022 is located between the back cover 4021 and the light-transmitting cover plate 4011, and the frame 4022 is fixed on the back cover 4021. The light-transmitting cover plate 4011 is fixed on the frame 4022. The light-transmitting cover plate 4011, the back cover 4021 and the frame 4022 enclose an internal accommodation space of the electronic device 400. The internal accommodation space accommodates the display screen 4012, the second battery 404, the main board, etc.

[0225] See also Fig.28 The frame 4022 is in a rectangular ring shape. The frame 4022 includes a first long side 4022a, a second long side 4022b, a first short side 4022c, and a second short side 4022d. The first long side 4022a and the second long side 4022b are arranged opposite to each other, and the first short side 4022c and the second short side 4022d are arranged opposite to each other. The frame 4022 is surrounded by the first long side 4022a, the first short side 4022c, the second long side 4022b, and the second short side 4022d.

[0226] In some embodiments, see Fig.29 , the electronic device 400 further includes a middle plate 403. The middle plate 403 is fixed to the inner surface of the frame 4022. The middle plate 403 is used as the structural "skeleton" of the electronic device 400, and the main board, the second battery 404, etc. can be fixed to the middle plate 403. When the electronic device 400 does not include the middle plate 403, the main board, the second battery 404, etc. can be fixed to the surface of the display screen 4012 facing the back cover 4021, or can be fixed to the inner surface of the back cover 4021.

[0227] The second battery 404 is used to provide power to electronic devices such as the display screen 4012 and the main board in the electronic device 400. The main board is used to integrate the control chip.

[0228] See also Fig.29 and Fig.30 , Fig.30 for Fig.28 Another schematic diagram of the electronic device 400 is shown. The third charging coil 405 is used to couple with the first charging coil 303 of the wireless charging base 300. The third charging coil 405 includes a second magnetic conductive plate 4051 and a third coil body 4052. The third coil body 4052 is stacked with the second magnetic conductive plate 4051. For details, please refer to Fig.29 The second magnetic conductive plate 4051 includes a third surface 4051a, and the third coil body 4052 is disposed on the third surface 4051a. The structure of the third charging coil 405 can be the same as that of the second charging coil 205, both of which are planar coils, and the structure of the third charging coil 405 is not described in detail here.

[0229] The third magnetic member 406 is used to magnetically cooperate with the first magnetic member 305. When the third magnetic member 406 is magnetically cooperated with the first magnetic member 305, the orthographic projection of the center of the first coil body 3032 on the first surface 3031a coincides with the orthographic projection of the center of the third coil body 4052 on the first surface 3031a. That is, the center of the through hole 3032a on the first coil body 3032 is aligned with the center of the center hole 4052a on the third coil body 4052. In this way, when the electronic device 400 is wirelessly charged through the wireless charging base 300, the third magnetic member 406 can be magnetically cooperated with the first magnetic member 305 to achieve alignment of the charging position of the electronic device 400, which can reduce the difficulty of aligning the electronic device 400 with the wireless charging base 300, and during the charging process, the electronic device 400 can be prevented from moving, which can improve the stability and reliability of the charging process.

[0230] The third magnetic attraction member 406 may be disposed on the second magnetic conductive plate 4051. For example, see Fig.30 , the third magnetic member 406 may be disposed in the central hole 4052a of the third coil body 4052. The extension direction of the third magnetic member 406 may be parallel to the third surface 4051a. Exemplarily, the extension direction of the third magnetic member 406 may be parallel to the first short side 4022c, or the extension direction of the third magnetic member 406 may be parallel to the first long side 4022a.

[0231] The structure of the third magnetic component 406 and the positional relationship between the third magnetic component 406 and the third coil body 4052 can be designed with reference to the structure of the first magnetic component 305 and the positional relationship between the first magnetic component 305 and the first coil body 3032, and will not be described in detail here.

[0232] It is understandable that in other embodiments, the third magnetic member 406 may also be provided on the back cover 4021. Alternatively, the third magnetic member 406 may not be provided on the electronic device 400. In this case, the user may realize the alignment of the third charging coil 405 and the first charging coil 303 by visual inspection or other positioning structures.

[0233] When the electronic device 400 includes the third magnetic attraction member 406, the electronic stylus pen 200 can also be charged by the electronic device 400. Fig.31 , Fig.31 for Fig.30 The electronic device 400 shown is a schematic diagram of wirelessly charging the electronic stylus 200. Specifically, during the charging process, the third magnetic attraction member 406 cooperates with the second magnetic attraction member 206, and the orthographic projection of the second charging coil 205 of the electronic stylus 200 on the third surface 4051a of the second magnetic conductive plate 4051 overlaps with the orthographic projection of the third coil body 4052 on the third surface 4051a of the second magnetic conductive plate 4051. The overlapping of the orthographic projection of the second charging coil 205 on the third surface 4051a and the orthographic projection of the third coil body 4052 on the third surface 4051a can be designed with reference to the overlapping of the orthographic projection of the second charging coil 205 on the first surface 3031a and the orthographic projection of the first coil body 3032 on the first surface 3031a, and will not be described in detail here.

[0234] The above embodiments are described by taking the wireless charging base 300 including a first coil body 3032 as an example. It can be understood that in other embodiments, the wireless charging base 300 can also include multiple first coil bodies 3032, and different first coil bodies 3032 can be arranged on the same first magnetic conductive plate 3031, or on different first magnetic conductive plates 3031. In this case, the first magnetic attraction member 305 can be arranged in the through hole 3032a of a part of the first coil bodies 3032, or the first magnetic attraction member 305 can be arranged in the through hole 3032a of each first coil body 3032. The extension direction of the first magnetic attraction member 305 in different first coil bodies 3032 can be the same or different.

[0235] For example, see Fig.32 , Fig.32The following is a schematic diagram of the structure of a wireless charging base 300 provided in some other embodiments of the present application. The wireless charging base 300 in this embodiment is a vertical base. Specifically, the wireless charging base 300 includes a support step 301 and a shell 302, and the shell 302 is obliquely arranged on the support step 301. The support step 301 is used to carry an electronic device 400 such as a mobile phone and a tablet computer, and the first charging coil 303, the first circuit board assembly 304, etc. are all arranged in the shell 302.

[0236] For details, please refer to Fig.32 The first charging coil 303 includes a first magnetic conductive plate 3031 and two first coil bodies 3032. The two first coil bodies 3032 are both disposed on the first magnetic conductive plate 3031. In this embodiment, the through holes 3032a of the two first coil bodies 3032 are both provided with first magnetic attracting members 305. Fig.32 and Fig.33 , the first magnetic members 305 in different first coil bodies 3032 have the same extending direction. In other embodiments, the first magnetic members 305 in different first coil bodies 3032 may also have different extending directions.

[0237] Specifically, the two first magnetic members 305 in this embodiment extend in the up-down direction. It is understandable that the extension direction of the first magnetic member 305 is not limited thereto, as long as the extension direction of the first magnetic member 305 is parallel to the first surface 3031a of the first magnetic conductive plate 3031.

[0238] Below Fig.32 The wireless charging base 300 shown in the figure is used to illustrate the charging scenario of the electronic stylus 200. Fig.33 , Fig.33 for Fig.32 The wireless charging base 300 is a schematic diagram of a scene in which the electronic stylus 200 is charged. Fig.33 As shown in (a), when the electronic stylus 200 is provided with two second magnetic members 206, the two second magnetic members 206 in the electronic stylus 200 can be magnetically matched with the two first magnetic members 305 in a one-to-one correspondence. In this way, the reliability of the magnetic matching between the electronic stylus 200 and the wireless charging base 300 can be further improved, and the electronic stylus 200 can be prevented from sliding off the wireless charging base 300 during the charging process.

[0239] For example, Fig.33 As shown in (b) , one of the two second magnetic components 206 of the electronic stylus 200 can be magnetically matched with one of the first magnetic components 305 , and the other of the two second magnetic components 206 cannot be magnetically matched with the first magnetic component 305 .

[0240] Fig.33 Only two charging scenarios are shown. It is understandable that in other embodiments, the user can select the magnetic suction position of the electronic stylus 200 and the wireless charging base 300 according to actual conditions, and can adjust the direction of the pen tip 2022 according to actual needs.

[0241] See also Fig.34 , Fig.34 for Fig.32 The wireless charging base 300 is a schematic diagram of a scene in which the electronic device 400 is wirelessly charged. Fig.34 As shown in (a) of FIG. 4 , the first long side 4022a of the electronic device 400 can be supported on the support step 301, and the third coil body 4052 of the electronic device 400 can be aligned with the first coil body 3032 close to the support step 301, so as to achieve coupling between the third charging coil 405 and the first charging coil 303. Fig.34 As shown in (b), the first short side 4022c of the electronic device 400 can be supported on the supporting step 301, and the third coil body 4052 of the electronic device 400 can be aligned with the first coil body 3032 away from the supporting step 301 to achieve coupling between the third charging coil 405 and the first charging coil 303.

[0242] See also Fig.35 , Fig.35 Schematic diagram of a wireless charging base 300 provided in some other embodiments of the present application. In this embodiment, the wireless charging base 300 includes two first coil bodies 3032, and a first magnetic attraction member 305 is disposed in a through hole 3032a of one of the two first coil bodies 3032 away from the supporting step 301.

[0243] In this case, see Fig.36 , Fig.36 for Fig.35 The wireless charging base 300 is a schematic diagram of a scene in which the electronic stylus 200 is wirelessly charged. Fig.36 As shown in (a) of FIG. 2 , the electronic stylus pen 200 can cooperate with the second magnetic member 206 by means of the first magnetic member 305 away from the pen tip 2022. Fig.36 As shown in (b) of FIG. 1 , the electronic stylus pen 200 can cooperate with the second magnetic component 206 by means of the first magnetic component 305 close to the pen tip 2022 .

[0244] See also Fig.37 , Fig.37Schematic diagram of a wireless charging base 300 provided in some other embodiments of the present application. In this embodiment, the wireless charging base 300 includes two first coil bodies 3032, and a first magnetic attraction member 305 is provided in a through hole 3032a of one of the two first coil bodies 3032 close to the support step 301. In this case, please refer to Fig.38 , Fig.38 for Fig.37 The wireless charging base 300 is a schematic diagram of a scene in which the electronic stylus 200 is wirelessly charged. Fig.38 As shown in (a) of FIG. 2 , the electronic stylus pen 200 can cooperate with the second magnetic member 206 by means of the first magnetic member 305 away from the pen tip 2022. Fig.38 As shown in (b) of FIG. 1 , the electronic stylus pen 200 can cooperate with the second magnetic component 206 by means of the first magnetic component 305 close to the pen tip 2022 .

[0245] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0246] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A wireless charging system, characterized in that: include: A wireless charging base, the wireless charging base comprising a first charging coil and a first magnetic attraction member, the first charging coil comprising a first magnetic conductive plate and a first coil body, the first magnetic conductive plate comprising a first surface, and the first coil body being stacked on the first surface; An electronic stylus, the electronic stylus comprising a second charging coil and a second magnetic member, the second charging coil comprising a magnetic core and a second coil body, the second coil body being wound around the outer circumference of the magnetic core, the second magnetic member being used to magnetically cooperate with the first magnetic member, and when the second magnetic member is magnetically cooperated with the first magnetic member, an orthographic projection of the second charging coil on the first surface overlaps with an orthographic projection of the first coil body on the first surface; The first charging coil is also used to couple with a third charging coil in the electronic device; the third charging coil includes a second magnetic conductive plate and a third coil body, the second magnetic conductive plate includes a third surface, the third coil body is stacked on the third surface, and the electronic device also includes a third magnetic attraction member; The second magnetic member is also used to magnetically cooperate with the third magnetic member, and when the second magnetic member is magnetically cooperated with the third magnetic member, the orthographic projection of the second charging coil on the third surface overlaps with the orthographic projection of the third coil body on the third surface.

2. The wireless charging system according to claim 1, characterized in that: The first coil body is annular, and includes a first extension section, which is located on the annular extension path of the first coil body. The orthographic projection of the second coil body on the first surface overlaps with the orthographic projection of the first extension section on the first surface. The extension direction of the central axis of the second coil body is a first direction, and the extension direction of the first extension section is a second direction, and the first direction is different from the second direction.

3. The wireless charging system according to claim 2, characterized in that: The first extension segment includes a straight line segment, and an angle between the first direction and the second direction is greater than or equal to 60 degrees and less than or equal to 120 degrees; and / or The first extension segment includes an arc segment, and an angle between the first direction and a tangent line of the first extension segment is greater than or equal to 60 degrees and less than or equal to 120 degrees.

4. The wireless charging system according to claim 2, characterized in that: The first coil body is ring-shaped, a through hole is formed in the middle of the first coil body, and a central axis of the second coil body intersects with a central axis of the through hole.

5. The wireless charging system according to any one of claims 2 to 4, characterized in that: The first coil body includes an outer coil, a middle coil and an inner coil arranged in sequence in a radial direction of the first coil body, the outer coil is located on a side of the middle coil away from the through hole, and the inner coil is located on a side of the middle coil close to the through hole. The magnetic field strength of the area where the outer coil is located is a first strength, the magnetic field strength of the area where the middle coil is located is a second strength, and the magnetic field strength of the area where the inner coil is located is a third strength, the second strength is greater than or equal to the first strength, and the second strength is greater than or equal to the third strength, The orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the middle coil on the first surface.

6. The wireless charging system according to claim 5, characterized in that: The orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the outer coil on the first surface, and the orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the inner coil on the first surface.

7. The wireless charging system according to any one of claims 1 to 4, characterized in that: The first coil body is ring-shaped, a through hole is formed in the middle of the first coil body, and the first magnetic attraction member is arranged on the first magnetic conductive plate and located in the through hole.

8. The wireless charging system according to claim 7, characterized in that: The first coil body includes a first inner circumferential surface, and the distance between the first magnetic attraction member and the first inner circumferential surface is greater than or equal to 3 mm; or The distance between the first magnetic attraction component and the first inner peripheral surface is greater than or equal to 3 mm and less than or equal to 5 mm.

9. The wireless charging system according to claim 7, characterized in that: The orthographic projection of the center of the first magnetic attraction member on the first surface covers the orthographic projection of the center of the through hole on the first surface.

10. The wireless charging system according to claim 9, characterized in that: An orthographic projection of a center of the first magnetic attraction member on the first surface coincides with an orthographic projection of a center of the through hole on the first surface.

11. The wireless charging system according to any one of claims 1 to 4, characterized in that: The first magnetic attraction member is in the shape of an elongated strip, and the length direction of the first magnetic attraction member is parallel to the first surface.

12. The wireless charging system according to any one of claims 1 to 4, characterized in that: When the first magnetic attraction member is magnetically matched with the second magnetic attraction member, a distance between the first coil body and the second coil body is less than or equal to 3 mm.

13. The wireless charging system according to any one of claims 1 to 4, characterized in that: The first magnetic attraction component and the second magnetic attraction component are both Halbach array magnets.

14. The wireless charging system according to any one of claims 1 to 4, characterized in that: There are two second magnetic members, and the two second magnetic members are respectively arranged on both sides of the second charging coil.

15. The wireless charging system according to any one of claims 1 to 4, characterized in that: The first magnetic conductive plate includes a second surface opposite to the first surface. A first groove is provided on the first surface and is recessed toward the second surface. At least a portion of the first magnetic attraction member is located in the first groove.

16. The wireless charging system according to any one of claims 1 to 4, characterized in that: The first magnetic conductive plate comprises: A bottom plate portion, wherein the first coil body and the bottom plate portion are stacked; a first side plate portion, the first side plate portion being disposed on the bottom plate portion and located on an inner circumference side of the first coil body; and / or The second side plate portion is provided on the bottom plate portion and is located on an outer peripheral side of the first coil body.

17. The wireless charging system according to any one of claims 1 to 4, characterized in that: The third magnetic member is used to magnetically cooperate with the first magnetic member, and when the third magnetic member is magnetically cooperated with the first magnetic member, the orthographic projection of the center of the third coil body on the first surface coincides with the orthographic projection of the center of the first coil body on the first surface.

18. A wireless charging system, characterized in that: include: An electronic device, the electronic device comprising a third charging coil and a third magnetic attraction member, the third charging coil comprising a second magnetic conductive plate and a third coil body, the second magnetic conductive plate comprising a third surface, and the third coil body being stacked on the third surface; An electronic stylus, the electronic stylus comprising a second charging coil and a second magnetic member, the second charging coil comprising a magnetic core and a second coil body, the second coil body being wound around the outer circumference of the magnetic core, the second magnetic member being used to magnetically cooperate with the third magnetic member, and when the second magnetic member is magnetically cooperated with the third magnetic member, the orthographic projection of the second charging coil on the third surface overlaps with the orthographic projection of the third coil body on the third surface; The third charging coil is also used to couple with the first charging coil in the wireless charging base; the first charging coil includes a first magnetic conductive plate and a first coil body, the first magnetic conductive plate includes a first surface, and the first coil body is stacked on the first surface; the wireless charging base includes a first magnetic attraction member; The second magnetic member is also used to magnetically cooperate with the first magnetic member, and when the second magnetic member is magnetically cooperated with the first magnetic member, the orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the first coil body on the first surface.

19. A wireless charging base, characterized in that: include: a first charging coil and a first magnetic attraction member, wherein the first charging coil comprises a first magnetic conductive plate and a first coil body, the first magnetic conductive plate comprises a first surface, and the first coil body is disposed on the first surface; the first charging coil is used to couple with a third charging coil in the electronic device; the third charging coil comprises a second magnetic conductive plate and a third coil body, the second magnetic conductive plate comprises a third surface, and the third coil body is stacked and disposed on the third surface; The first magnetic attraction member is used to magnetically cooperate with the second magnetic attraction member on the electronic stylus, and when the first magnetic attraction member and the second magnetic attraction member are magnetically cooperated, the orthographic projection of the second charging coil of the electronic stylus on the first surface overlaps with the orthographic projection of the first coil body on the first surface; The second magnetic component is also used to magnetically cooperate with the third magnetic component in the electronic device, and when the second magnetic component is magnetically cooperated with the third magnetic component, the orthographic projection of the second charging coil on the third surface overlaps with the orthographic projection of the third coil body on the third surface.

20. The wireless charging base according to claim 19, characterized in that: The first coil body is ring-shaped, a through hole is formed in the middle of the first coil body, and the first magnetic attraction member is arranged on the first magnetic conductive plate and located in the through hole.

21. The wireless charging base according to claim 20, characterized in that: The first magnetic attraction member is in the shape of an elongated strip, and the length direction of the first magnetic attraction member is parallel to the first surface.

22. The wireless charging base according to claim 20, characterized in that: An orthographic projection of a center of the first magnetic attraction member on the first surface coincides with an orthographic projection of a center of the through hole on the first surface.

23. The wireless charging base according to any one of claims 19 to 22, characterized in that: The wireless charging base comprises a shell, and the first charging coil is arranged in the shell. The shell includes a top plate, the top plate is located on the side facing the first surface, and the first magnetic attraction member is arranged on the top plate.

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