CN117728591A

CN117728591A - Wireless charging system and wireless charging base

Info

Publication number: CN117728591A
Application number: CN202310510027.4A
Authority: CN
Inventors: 武渊; 马雷; 王朝
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2024-03-19

Abstract

The application discloses wireless charging system and wireless charging base relates to wireless charging technical field, can carry out wireless charging for electronic handwriting pen through wireless charging base. The electronic handwriting pen comprises a wireless charging base and an electronic handwriting pen, wherein the wireless charging base comprises a first charging coil and a first magnetic attraction piece, the first charging coil comprises a first magnetic conduction plate and a first coil main body, the first magnetic conduction plate comprises a first surface, and the first coil main body is arranged on the first surface in a lamination mode; the electronic handwriting pen comprises a second charging coil and a second magnetic attraction piece, the second charging coil comprises a magnetic core and a second coil main body, the second coil main body is wound on the outer peripheral surface of the magnetic core, the second magnetic attraction piece is used for being magnetically attracted to be matched with the first magnetic attraction piece, and when the second magnetic attraction piece is magnetically attracted to be matched with the first magnetic attraction piece, orthographic projection of the second charging coil on the first surface is overlapped with orthographic projection of the first coil main body on the first surface.

Description

Wireless charging system and wireless charging base

Technical Field

The application relates to the technical field of wireless charging, in particular to a wireless charging system and a wireless charging base.

Background

The electronic handwriting pen is charged mainly through two modes of wired charging and wireless charging. The wired charging is usually to provide a wired charging interface on the electronic stylus, and then connect to a power supply device such as an adapter through a cable, so that the integrity and the appearance aesthetic property of the electronic stylus are difficult to realize in the charging manner. Therefore, most electronic handwriting pens are charged in a wireless charging manner. The wireless charging mode is that wireless charging coils are arranged on electronic equipment such as a tablet personal computer and the electronic handwriting pen, and when the electronic handwriting pen is fixed on the electronic equipment, the wireless charging coils on the electronic handwriting pen are coupled with the wireless charging coils on the electronic equipment, so that the wireless charging of the electronic handwriting pen is realized.

However, when the electronic devices such as the tablet personal computer do not have the function of charging the electronic handwriting pen due to the positioning of the product and other factors, the user needs to purchase the wireless charging devices such as the wireless charging magnetic rod and the wireless charging pen box to perform wireless charging for the electronic handwriting pen, so that the use cost of the user is increased. Therefore, the electronic stylus needs to find a new charging mode.

Disclosure of Invention

The application provides a wireless charging system and wireless charging base, can carry out wireless charging for electronic handwriting pen through wireless charging base. In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, the present application proposes a wireless charging system, including a wireless charging base and an electronic handwriting pen, the wireless charging base includes a first charging coil and a first magnetic attraction piece, the first charging coil includes a first magnetic conductive plate and a first coil main body, the first magnetic conductive plate includes a first surface, and the first coil main body is stacked on the first surface; the electronic handwriting pen comprises a second charging coil and a second magnetic attraction piece, the second charging coil comprises a magnetic core and a second coil main body, the second coil main body is wound on the outer peripheral surface of the magnetic core, the second magnetic attraction piece is used for being magnetically attracted to be matched with the first magnetic attraction piece, and when the second magnetic attraction piece is magnetically attracted to be matched with the first magnetic attraction piece, orthographic projection of the second charging coil on the first surface is overlapped with orthographic projection of the first coil main body on the first surface.

Thus, the wireless charging system in the application can position the charging position of the electronic handwriting pen through the magnetic attraction matching of the first magnetic attraction piece and the second magnetic attraction piece, so that the first charging coil and the second charging coil have good coupling states, and the stable charging of the electronic handwriting pen by the wireless charging base is realized. Therefore, the wireless charging base in the embodiment of the application can be used for wirelessly charging electronic equipment such as a tablet personal computer and a mobile phone, can also be used for wirelessly charging an electronic handwriting pen, can expand the function of the wireless charging base, can expand the charging scene of the electronic handwriting pen, and can improve the charging convenience of the electronic handwriting pen.

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

In one possible implementation manner of the first aspect, the first extension section includes a straight line section, an included 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 section includes an arc section, and an included angle between the first direction and a tangent line of the first extension section is greater than or equal to 60 degrees and less than or equal to 120 degrees. Therefore, more magnetic force lines can pass through the second coil main body along the first direction, so that the coupling coefficient between the first charging coil and the second charging coil can be ensured, and the charging efficiency of the wireless charging base to the electronic handwriting pen can be improved.

In a possible implementation manner of the first aspect, the first coil body is annular, a through hole is formed in a middle portion of the first coil body, and a central axis of the second coil body intersects with a central axis of the through hole. Thus, the number of magnetic lines passing through the second coil body in the first direction can be further increased, so that the coupling coefficient between the first charging coil and the second charging coil can be further increased, and the charging efficiency can be improved.

In one possible implementation manner of the first aspect, the first coil body includes an outer coil, a middle coil and an inner coil that are sequentially arranged 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, the inner coil is located on a side of the middle coil close to the through hole, a magnetic field strength of a region where the outer coil is located is a first strength, a magnetic field strength of a region where the middle coil is located is a second strength, a magnetic field strength of a region 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 an orthographic projection of the second charging coil on the first surface overlaps an orthographic projection of the middle coil on the first surface. Therefore, the area covered by the second charging coil can be ensured to have higher magnetic field intensity, and the number of magnetic force lines passing through the second coil main body along the first direction can be increased, so that the charging efficiency of the electronic stylus pen can be improved. That is, the region where the first coil body and the second charging coil are aligned can be ensured to have higher magnetic field strength, and the charging efficiency of the electronic stylus can be improved.

In one possible implementation manner of the first aspect, an orthographic projection of the second charging coil on the first surface overlaps an orthographic projection of the outer ring coil on the first surface, and an orthographic projection of the second charging coil on the first surface overlaps an orthographic projection of the inner ring coil on the first surface. Therefore, in the charging process, the uniformity and symmetry of the magnetic field environment where the second charging coil is located can be ensured, 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 can be increased, the number of magnetic force lines passing through the second coil body along the first direction can be further increased, the coupling coefficient between the first charging coil and the second charging coil can be improved, and the charging efficiency can be improved.

In a possible implementation manner of the first aspect, the first coil body is annular, a through hole is formed in a middle portion of the first coil body, and the first magnetic attraction piece is disposed on the first magnetic conductive plate and is located in the through hole. In this way, on one hand, the first magnetic attraction piece is surrounded by the first coil main body, and the second charging coil is positioned on one side of the second magnetic attraction piece, which is close to the pen point, or one side of the second magnetic attraction piece, which is close to the rear cover, so that the orthographic projection of the second charging coil on the first surface overlaps with the orthographic projection of the first coil main body on the first surface, thereby facilitating the coupling between the first charging coil and the second charging coil; on the other hand, the space in the middle of the first coil main body can be fully utilized, so that the structure of the wireless charging base is more compact, the whole volume of the wireless charging base is reduced, and the miniaturization design of the wireless charging base is realized; in still another aspect, the magnetic field strength in the through hole of the first coil main body is lower (that is, the magnetic induction density is lower), and the first magnetic attraction piece is arranged in the through hole, so that the interference of the first magnetic attraction piece on the induction magnetic field can be reduced.

In a possible implementation manner of the first aspect, the first coil body includes a first inner peripheral surface, and a distance between the first magnetic attraction member and the first inner peripheral surface is greater than or equal to 3mm. In this way, the first magnetic attraction piece can be prevented from interfering the induction magnetic field.

In a possible implementation manner of the first aspect, the first coil body includes a first inner peripheral surface, and a distance between the first magnetic attraction member and the first inner peripheral surface is greater than or equal to 3mm and less than or equal to 5mm. Therefore, on one hand, the first magnetic attraction piece can be prevented from interfering the induction magnetic field between the first charging coil and the second charging coil, on the other hand, the length of the first magnetic attraction piece is increased, the volume of the first magnetic attraction piece is ensured, and therefore the magnetic attraction between the first magnetic attraction piece and the second magnetic attraction piece can be ensured.

In a possible implementation manner of the first aspect, an orthographic projection of a center of the first magnetic attraction piece on the first surface covers an orthographic projection of a center of the through hole on the first surface. Because the magnetic induction density at the through hole is the lowest, the orthographic projection of the center of the first magnetic attraction piece on the first surface covers the orthographic projection of the center of the through hole on the first surface, and the interference of the first magnetic attraction piece on the induced magnetic field can be reduced.

In a possible implementation manner of the first aspect, an orthographic projection of a center of the first magnetic attraction piece on the first surface coincides with an orthographic projection of a center of the through hole on the first surface. In this way, the distance between the first magnetic attraction piece and the first coil main body is facilitated to be increased, and meanwhile the length of the first magnetic attraction piece is facilitated to be increased. In addition, the magnetic induction density at the through hole is the lowest, and the orthographic projection of the center of the first magnetic attraction piece on the first surface coincides with the orthographic projection of the center of the through hole on the first surface, so that the interference of the first magnetic attraction piece on the induced magnetic field can be reduced.

In a possible implementation manner of the first aspect, the magnetic core includes a first end face and a second end face opposite to each other in an axial direction thereof, the first coil body includes a first inner peripheral face and a first outer peripheral face opposite to each other, a distance between the first end face and the first inner peripheral face is a first distance, a distance between the second end face and the first outer peripheral face is a second distance, and a difference between the first distance and the second distance is greater than or equal to-2 mm and less than or equal to 2mm. Thus, the uniformity and symmetry of the magnetic field environment where the second charging coil is located can be further ensured.

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

In a possible implementation manner of the first aspect, the wireless charging base includes a housing, the first charging coil is disposed in the housing, the housing includes a top plate, the top plate is located on a side of the first coil body facing away from the first magnetic conductive plate, and a minimum distance between the first coil body and an outer surface of the top plate is less than or equal to 2mm. That is, the minimum value of the space between the first coil body and the outer surface of the top plate is less than or equal to 2mm. Like this, be favorable to reducing the interval between first charging coil and the second charging coil, and be favorable to reducing the thickness of wireless charging base, realize wireless charging base's frivolous design, be convenient for wireless charging base accomodate and carry.

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

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

In a possible implementation manner of the first aspect, the electronic handwriting pen includes a pen holder, the second charging coil is disposed in the pen holder, and a minimum distance between the second coil body and an outer peripheral surface of the pen holder is less than or equal to 1mm. Thus, the distance between the first charging coil and the second charging coil is reduced, the radial dimension of the outer peripheral surface of the electronic handwriting pen is reduced, and the electronic handwriting pen is convenient for a user to hold.

In a possible implementation manner of the first aspect, the first magnetic attraction member is in a strip shape, and a length direction of the first magnetic attraction member is parallel to the first surface. Like this, be favorable to increasing first magnetism and inhale the volume of piece to be favorable to increasing first magnetism and inhale the magnetism suction between piece and the second magnetism, can improve the in-process of charging, the position stability of electronic writing pen, and then can improve the stability of charging process.

In one possible implementation manner of the first aspect, the first magnetic attraction member and the second magnetic attraction member are halbach array magnets. The halbach array magnet can converge magnetic force lines on one side of the magnet and weaken the magnetic force lines on the other side by arranging the magnets in different magnetizing directions according to a certain rule, so that a relatively ideal unilateral magnetic field is obtained. Therefore, the first magnetic attraction piece and the second magnetic attraction piece are arranged to be halbach array magnets, so that the magnetic attraction between the first magnetic attraction piece and the second magnetic attraction piece can be improved, and the adsorption reliability between the wireless charging base and the electronic handwriting pen can be improved.

In one possible implementation manner of the first aspect, the first magnetic attraction piece 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 sequentially arranged 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, the magnetization direction of the third magnetic portion is opposite to the magnetization direction of the first magnetic portion, and a magnetic pole of one end of the second magnetic portion facing the first magnetic portion is the same as a magnetic pole of one end of the first magnetic portion facing away from the first magnetic conductive plate. A specific structure of a first magnetic attraction member is provided.

In a possible implementation manner of the first aspect, the number of the second magnetic attraction pieces is two, and the two second magnetic attraction pieces are respectively arranged at two sides of the second charging coil. Therefore, the electronic handwriting pen can be positioned through the magnetic attraction matching of any one of the two second magnetic attraction pieces and the first magnetic attraction piece, the charging scene of the electronic handwriting pen through the wireless charging base can be expanded, the probability of successful alignment of the electronic handwriting pen and the wireless charging base can be improved, and the positioning difficulty between the electronic handwriting pen and the wireless charging base can be reduced. And moreover, the electronic handwriting pen can be guaranteed to have the same coupling coefficient under different charging scenes, and the charging efficiency can be guaranteed.

In a possible implementation manner of the first aspect, the first magnetic conductive plate includes a second surface opposite to the first surface, a first groove recessed toward the second surface is provided on the first surface, and at least part of the first magnetic attraction member is located in the first groove. Like this, through setting up first recess, can reduce first magnetic conduction board and first magnetism and inhale the piece in the ascending stack size of wireless base thickness direction that charges, be favorable to reducing the thickness of wireless base that charges, simultaneously, can increase the thickness that first magnetism was inhaled the piece, be favorable to increasing first magnetism and inhale the volume of piece to be favorable to increasing first magnetism and inhale the piece and second magnetism inhale the magnetic attraction between the piece.

In a possible implementation manner of the first aspect, a dimension of the first magnetic attraction member in a thickness direction of the first magnetic conductive plate is larger than a dimension of the first recess 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.

In a possible implementation manner 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, the first coil main body being laminated with the bottom plate portion; the first side plate part is arranged on the bottom plate part and positioned on the inner periphery side of the first coil main body; the second side plate is disposed on the bottom plate and on the outer periphery 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 to the magnetic field of the first charging coil, and the second side plate portion can reduce the interference of the structure located on the outer peripheral side of the first coil body to the magnetic field of the first charging coil, so that the magnetic field intensity of the first charging coil can be increased, and the charging efficiency can be improved. Meanwhile, the first side plate part and the second side plate part of the bottom plate part can also play a limiting role on the first coil main body, so that dislocation of the first coil main body in the installation or use process is avoided.

In a possible implementation manner of the first aspect, the bottom plate portion, the first side plate portion and the second side plate portion are an integrally formed structure. That is, the first magnetic conductive plate is an integral molding. Thus, the process of the first magnetic conduction plate can be simplified, and the processing cost can be reduced.

In a possible implementation manner of the first aspect, the wireless charging system further 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 is laminated with the second magnetic conductive plate, and the third charging coil is configured to be coupled with the first charging coil.

In a possible implementation manner of the first aspect, the electronic device includes a third magnetic attraction piece, the third magnetic attraction piece is configured to magnetically attract and cooperate with the first magnetic attraction piece, and when the third magnetic attraction piece magnetically attracts and cooperates with the first magnetic attraction piece, an orthographic projection of a center of the third coil body on the first surface coincides with an orthographic projection of a center of the first coil body on the first surface. Like this, when charging electronic equipment through wireless charging base to wireless, can inhale the piece through the third magnetism and inhale a magnetism and inhale the cooperation with first magnetism, realize counterpoint electronic equipment's charge position, can reduce electronic equipment and wireless charging base's the difficulty of counterpoint, and in charging process, can avoid electronic equipment to take place to remove, can improve charging process's stability and reliability.

In a second aspect, the present application provides a wireless charging system comprising: the electronic equipment comprises a third charging coil and a third magnetic attraction piece, wherein the third charging coil comprises a second magnetic conduction plate and a third coil main body, the second magnetic conduction plate comprises a third surface, and the third coil main body is arranged on the third surface; the electronic handwriting pen comprises a second charging coil and a second magnetic attraction piece, the second charging coil comprises a magnetic core and a second coil main body, the second coil main body is wound on the outer peripheral surface of the magnetic core, the second magnetic attraction piece is used for being magnetically attracted to be matched with a third magnetic attraction piece, and when the second magnetic attraction piece is magnetically attracted to be matched with the third magnetic attraction piece, orthographic projection of the second charging coil on the third surface is overlapped with orthographic projection of the third coil main body on the third surface. Another implementation of wireless charging of an electronic stylus is provided.

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

In a possible implementation manner of the second aspect, the second extension section includes a straight line section, and an included 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 section comprises an arc section, and the included angle between the first direction and the tangent line of the first extension section is more than or equal to 60 degrees and less than or equal to 120 degrees.

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

In a third aspect, the present application provides a wireless charging base comprising: the first charging coil comprises a first magnetic conduction plate and a first coil main body, the first magnetic conduction plate comprises a first surface, and the first coil main body is arranged on the first surface; the first magnetic attraction piece is used for being magnetically attracted to be matched with the second magnetic attraction piece on the electronic handwriting pen, and when the first magnetic attraction piece is magnetically attracted to be matched with the second magnetic attraction piece, the orthographic projection of the second charging coil of the electronic handwriting pen on the first surface is overlapped with the orthographic projection of the first coil main body on the first surface.

In a possible implementation manner of the third aspect, the first coil body is annular, a through hole is formed in a middle portion of the first coil body, and the first magnetic attraction piece is disposed on the first magnetic conductive plate and is located in the through hole.

In a possible implementation manner of the third aspect, the wireless charging base includes a housing, the first charging coil is disposed in the housing, the housing includes a top plate, the top plate is located on a side toward which the first surface faces, and the first magnetic attraction member is disposed on the top plate.

The technical effects caused by any implementation manner of the second aspect to the third aspect may refer to the technical effects caused by different implementation manners of the first aspect, which are not described herein.

Drawings

Fig. 1 is a schematic diagram of a wireless charging device for wirelessly charging an electronic handwriting pen according to some embodiments of the present application;

fig. 2 is a schematic diagram of a wireless charging device for wirelessly charging an electronic handwriting pen according to other embodiments of the present application;

fig. 3 is a schematic diagram of wireless charging of an electronic device by a wireless charging base according to some embodiments of the present application;

fig. 4 is a schematic diagram of wireless charging of an electronic device by a wireless charging base according to other embodiments of the present disclosure;

FIG. 5 is another schematic diagram of the wireless charging dock of FIG. 4 wirelessly charging an electronic device;

fig. 6 is a schematic structural diagram of a wireless charging system according to some embodiments of the present disclosure;

Fig. 7 is a schematic structural diagram of a wireless charging base in the wireless charging system shown in fig. 6;

FIG. 8 is an exploded view of the wireless charging base of FIG. 7;

fig. 9 is a perspective view of a first charging coil of the wireless charging base of fig. 8;

FIG. 10 is a schematic diagram of an electronic stylus in the wireless charging system of FIG. 6;

FIG. 11 is an exploded view of the electronic stylus of FIG. 10;

FIG. 12 is a perspective view of a second charging coil of the electronic stylus of FIG. 11;

FIG. 13 is a schematic diagram of the wireless charging base of the wireless charging system shown in FIG. 6 for wirelessly charging an electronic pen;

fig. 14 is a schematic diagram of a positional relationship among the first charging coil, the first magnetic attraction member, the second charging coil, and the second magnetic attraction member when the wireless charging base wirelessly charges the electronic handwriting pen in the wireless charging system shown in fig. 6;

FIG. 15a is a top view of the schematic diagram of the positional relationship shown in FIG. 14;

FIG. 15b is a schematic diagram of an induced magnetic field generated by a first charging coil of the wireless charging system shown in FIG. 13;

FIG. 16 is a schematic diagram of the wireless charging base of the wireless charging system shown in FIG. 13 for wirelessly charging an electronic pen;

FIG. 17 is an enlarged view of the area A of FIG. 16;

FIG. 18 is another schematic view of the wireless charging dock of FIG. 7;

FIG. 19a is a schematic diagram of another charging scenario of the wireless charging system of FIG. 6;

FIG. 19b is another schematic diagram of the charging scenario of FIG. 19 a;

FIG. 20 is a graph of simulated relationship between 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 according to some embodiments of the present application;

fig. 21 is a schematic diagram illustrating a positional relationship between a first charging coil and a second charging coil according to some embodiments of the present disclosure;

fig. 22 is another schematic diagram of a positional relationship between a first charging coil and a second charging coil according to some embodiments of the present disclosure;

FIG. 23 is a schematic view of an assembly of a first charging coil and a first magnetic attraction member provided in further embodiments of the present application;

FIG. 24 is an exploded view of a first charging coil provided in further embodiments of the present application;

FIG. 25 is a schematic view of an assembly of the first coil body and the first magnetically permeable plate of the exploded view of FIG. 24;

fig. 26 is an assembled schematic view of the first charging coil and the housing of the wireless charging base shown in fig. 25;

FIG. 27 is a schematic diagram of the wireless charging base of FIG. 7 wirelessly charging an electronic device;

FIG. 28 is a perspective view of the electronic device shown in the schematic diagram of FIG. 27;

FIG. 29 is a cross-sectional view of the perspective view of FIG. 28 taken along line A-A;

FIG. 30 is another schematic view of the electronic device of FIG. 28;

FIG. 31 is a schematic diagram of the electronic device of FIG. 30 wirelessly charging an electronic pen;

fig. 32 is a schematic structural diagram of a wireless charging base according to other embodiments of the present disclosure;

FIG. 33 is a schematic view of a wireless charging dock of FIG. 32 charging an electronic stylus;

fig. 34 is a schematic view of a scenario in which the wireless charging base shown in fig. 32 wirelessly charges an electronic device;

fig. 35 is a schematic view of a wireless charging base provided in further embodiments of the present application;

FIG. 36 is a schematic view of a scenario in which the wireless charging dock shown in FIG. 35 is used to wirelessly charge an electronic pen;

fig. 37 is a schematic view of a wireless charging dock provided in further embodiments of the present application;

fig. 38 is a schematic view of a scenario in which the wireless charging dock shown in fig. 37 wirelessly charges an electronic pen.

Reference numerals:

1000. a wireless charging system; 1001. a wireless charging coil;

100. a wireless charging device; 101. a first magnetic structure;

200. an electronic stylus; 201. a second magnetic structure; 202. a housing, 2021, a barrel; 2021a, first end; 2021b, second end; 2021c, a first plane; 2021d, a first cambered surface; 2022. a pen point; 2022a, writing end; 2022b, connection end; 2023. a rear cover; 203. a second circuit board assembly; 2031. a second circuit board; 2032. a second electronic component; 204. a first battery; 205. a second charging coil; 2051. a magnetic core; 2051a, a first end face; 2051b, a second end face; 2052. a second coil body; 206. a second magnetic attraction member; 2061. a fourth magnetic section; 2062. a fifth magnetic section; 2063. a sixth magnetic section;

300. A wireless charging base; 301. a support step; 302. a housing; 3021. a top plate; 3022. a bottom plate; 3023. a side plate; 3024. a socket; 303. a first charging coil; 3031. a first magnetic conductive plate; 3031a, a first surface; 3031b, a second surface; 3031c, a first groove; 3031d, a bottom plate portion; 3031e, a first side plate portion; 3031f, a second side plate portion; 3032. a first coil body; 3032a, through holes; 3032b, an outer ring coil; 3032c, middle coil; 3032d, an inner coil; 3032e, a first inner peripheral surface; 3032f, a first outer circumferential surface; 3032g, a first extension; 304. a first circuit board assembly; 3041. a first circuit board; 3042. a first electronic component; 3043. a power interface; 305. a first magnetic attraction member; 3051. a first magnetic section; 3052. a second magnetic section; 3053. a third magnetic section; 305a, a first mating surface; 305b, a second mating surface; 306. a main body portion;

400. an electronic device; 401. a screen; 4011. a light-transmitting cover plate; 4012. a display screen; 402. a back shell; 4021. a back cover; 4022. a frame; 4022a, a first long side; 4022b, a second long side; 4022c, a first short side; 4022d, a second short side; 403. a middle plate; 404. a second battery; 405. a third charging coil; 4051. a second magnetic conductive plate; 4021a, a third surface; 4052. a third coil body; 4052a, a central aperture; 406. and a third magnetic attraction piece.

Detailed Description

In the embodiments of the present application, the terms "exemplary" or "such as" and the like are used to denote examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the present embodiments, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the embodiment of the present application, "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" in the present application generally indicates that the front-rear association object is an or relationship.

In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and for example, "connected" may be either detachably connected or non-detachably connected; may be directly connected or indirectly connected through an intermediate medium. Wherein, "fixedly connected" means that the relative positional relationship is unchanged after being connected with each other. "rotationally coupled" means coupled to each other and capable of relative rotation after coupling. "slidingly coupled" means coupled to each other and capable of sliding relative to each other after being coupled.

In the description of embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the description of the embodiments of the present application, the terms "direction consistent", "perpendicular", "parallel", "equal" include the stated case as well as the case similar to the stated case, the range of which is within an acceptable deviation range as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where the acceptable deviation range for approximately parallel may be, for example, a deviation within 5 °; "vertical" includes absolute vertical and near vertical, where the acceptable deviation range for near vertical may also be deviations within 5 °, for example. "equal" includes absolute equal and approximately equal, where the difference between the two, which may be equal, for example, is less than or equal to 5% of either of them within an acceptable deviation of approximately equal.

For ease of understanding, before describing the wireless charging system and the wireless charging base in detail in the embodiments of the present application, related terms related to the embodiments of the present application will be described first.

Reverse wireless charging function: the wireless charging device is used for wirelessly charging other electronic devices through the wireless charging coil.

Forward wireless charging function: the wireless charging device is used for receiving wireless charging input of other wireless charging devices through the wireless charging coil and performing wireless charging.

Coupling coefficient: the degree of tightness of the coupling between the transmit coil and the receive coil. The coupling coefficient is related to the degree of positional deviation of the two coils, and is higher when the degree of deviation of the transmitting coil and the receiving coil is smaller, and is lower in the opposite. The higher the coupling coefficient of the transmitting coil and the receiving coil, the higher the efficiency of the transmitting coil and the receiving coil in transmitting power.

Qi: the world has first pushed the standardization organization for wireless charging technology-the wireless charging consortium (wireless power consortium, WPC) push for the "wireless charging" standard.

Magnetizing direction: the S pole of the magnet points in the direction of the N pole.

With the rapid development of electronic devices (such as tablet computers, mobile phones, etc.), more and more electronic devices are configured with touch screens, and touch control becomes an important means for realizing man-machine interaction of the electronic devices. At present, besides a touch mode of directly contacting and operating a touch screen by a finger, clicking, writing and stroking on the touch screen by using an electronic stylus is also a very common touch mode. The use of electronic handwriting pens is much higher than the use of fingers in terms of the accuracy of input and control. Moreover, many touch functions use electronic handwriting pens to perform a habit that better conforms to people. Thus, a considerable number of electronic devices currently have a companion electronic stylus.

The electronic handwriting pen is charged mainly through two modes of wired charging and wireless charging. The wired charging is generally that a wired charging interface (such as Type-C, micro B, POGO pin, USB interface, etc.) is disposed on an electronic stylus, and then the wired charging interface is connected to a power supply device such as an adapter through a cable, so that the integrity and the appearance aesthetic property of the electronic stylus are difficult to be realized in the charging manner. Therefore, most electronic handwriting pens are charged in a wireless charging manner. The wireless charging mode is generally that wireless charging coils are arranged on the wireless charging equipment and the electronic handwriting pen, and when the electronic handwriting pen is fixed on the wireless charging equipment, the wireless charging coils on the electronic handwriting pen are coupled with the wireless charging coils on the wireless charging equipment, so that the wireless charging of the electronic handwriting pen is realized.

Specifically, the wireless charging device may be an electronic device such as a mobile phone, a tablet computer, a wireless keyboard, etc. with a reverse wireless charging function, or may be a device such as a wireless charging magnetic bar, a wireless charging pen box, etc.

Of course, the electronic device with the reverse wireless charging function can also receive wireless charging input of other wireless charging devices through the wireless charging coil, that is, the electronic device supports forward wireless charging.

Referring to fig. 1, fig. 1 is a schematic diagram of a wireless charging device 100 for wirelessly charging an electronic stylus 200 according to some embodiments of the present application. The wireless charging device 100 in this embodiment is a tablet computer. Specifically, in the wireless charging process, the wireless charging coil 1001 in the wireless charging device 100 may be used as a radio transmitting end, and the wireless charging coil 1001 in the electronic stylus 200 may be used as a radio receiving end. That is, the wireless charging coil 1001 in the wireless charging device 100 may be used as a Transmission (TX) coil, and the wireless charging coil 1001 in the electronic stylus 200 may be used as a Reception (RX) coil.

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, and the wireless charging coil 1001 (i.e. the transmitting coil) in the wireless charging device 100 is located on one side of the interface, and the wireless charging coil 1001 (i.e. the receiving coil) in the electronic stylus 200 is located on the other side of the interface.

Referring to fig. 1, in the wireless charging process, when an alternating current I1 is introduced into a wireless charging coil 1001 (i.e., a transmitting coil) in the wireless charging device 100, an alternating magnetic field H is generated around the wireless charging coil 1001 (i.e., a receiving coil) in the electronic stylus 200, and magnetic induction lines of the magnetic field H at least partially pass through an area surrounded by the wireless charging coil 1001 in the electronic stylus 200, based on this, according to an electromagnetic induction principle, 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 and thus wireless charging of a battery arranged in the electronic stylus 200.

In some embodiments, referring to fig. 1, the wireless charging coil 1001 in the electronic stylus 200 is a solenoid coil with a magnetic core, and 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 also typically a solenoid coil with a magnetic core.

On this basis, in order to ensure that the positions of the wireless charging coil 1001 in the wireless charging device 100 and the wireless charging coil 1001 in the electronic stylus 200 can be aligned accurately, and reduce the alignment difficulty, please refer to fig. 1, the wireless charging device 100 is provided with a first magnetic structure 101, the electronic stylus 200 is provided with a second magnetic structure 201, and the second magnetic structure 201 and the first magnetic structure 101 can be magnetically engaged. The first magnetic attraction structure 101 and the second magnetic attraction structure 201 include, but are not limited to, attraction magnets. In this way, in the charging process, the auxiliary positioning can be performed through the magnetic attraction cooperation of the first magnetic attraction structure 101 and the second magnetic attraction structure 201, on one hand, the alignment of the wireless charging coil 1001 on the electronic stylus 200 and the wireless charging coil 1001 on the wireless charging device 100 can be ensured, the alignment difficulty is reduced, on the other hand, the connection reliability of the electronic stylus 200 and the wireless charging device 100 can be improved, the separation of the electronic stylus 200 and the wireless charging device 100 in the charging process is avoided, and therefore stable wireless charging can be realized. In addition, the wireless charging coil 1001 in the wireless charging apparatus 100 and the wireless charging coil 1001 in the electronic stylus 200 can be made as close as possible, which is advantageous in improving the charging efficiency.

In other embodiments, when the electronic device such as a tablet computer and a mobile phone does not have the function of charging the electronic stylus 200 (i.e. the reverse wireless charging function) due to the positioning of the product itself, the electronic stylus 200 can also be wirelessly charged by the wireless charging device 100 such as a special wireless charging magnetic rod and a wireless charging pen box.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a wireless charging device 100 for wirelessly charging an electronic stylus 200 according to another embodiment of the present application. In this embodiment, the wireless charging device 100 is a wireless charging magnetic bar. The process and the positioning method of the wireless charging magnetic rod for wirelessly charging the electronic stylus 200 are the same as the process and the positioning method of the electronic device for wirelessly charging the electronic stylus 200, and will not be described in detail here.

Because the wireless charging magnetic rod and the wireless charging pen box generally need to be purchased independently by a user, the use cost of the user is increased. The wireless charging technology of the current electronic devices such as mobile phones and tablet computers is rapidly developed, and many electronic devices such as mobile phones and tablet computers have forward wireless charging functions, so that wireless charging is performed on the electronic devices such as mobile phones and tablet computers through wireless charging bases, and the wireless charging is also increasingly popular, so that more and more users have wireless charging bases. Wherein the electronic device and the wireless charging dock may be charged based on Qi protocol. The principle of the wireless charging base for wirelessly charging the electronic device may be described with reference to the principle of the wireless charging device for wirelessly charging the electronic handwriting pen in the above embodiment, which will not be described in detail here.

Under the situation, if the electronic handwriting pen can be charged wirelessly through the wireless charging base, the wireless charging scene of the electronic handwriting pen can be expanded, and at this time, even if electronic devices such as a tablet personal computer and a mobile phone matched with the electronic handwriting pen do not have the function of charging the electronic handwriting pen, a user does not need to purchase special wireless charging equipment for the electronic handwriting pen, the convenience of charging the electronic handwriting pen for the user can be improved, and the use cost of the electronic handwriting pen can be reduced.

Currently, wireless charging bases include flat-bed bases and upright bases. Referring to fig. 3-5, fig. 3 is a schematic diagram of wireless charging of the electronic device 400 by the wireless charging base 300 according to some embodiments of the present application, fig. 4 is a schematic diagram of wireless charging of the electronic device 400 by the wireless charging base 300 according to other embodiments of the present application, and fig. 5 is another schematic diagram of wireless charging of the electronic device 400 by the wireless charging base 300 according to fig. 4. The embodiments shown in fig. 3-5 are all described using the electronic device 400 as a mobile phone.

Referring to fig. 3, the wireless charging base 300 in the embodiment shown in fig. 3 is a flat base. The wireless charging base 300 in this embodiment may be horizontally placed on a supporting surface (e.g., a desktop), and the electronic device 400 may be horizontally placed on the wireless charging base 300 for wireless charging. Referring to fig. 4 and 5, the wireless charging base 300 in the embodiment shown in fig. 4 and 5 is a vertical base. The wireless charging dock 300 in this embodiment supports both charging with the electronic device 400 vertically (as shown in fig. 4) and charging with the electronic device 400 horizontally (as shown in fig. 5).

Specifically, when the wireless charging coil in the electronic device 400 is close to the wireless charging coil of the wireless charging base 300 and the centers of the wireless charging coil and the wireless charging coil are aligned, the electronic device 400 to be charged may be charged through the wireless charging base 300.

In this embodiment of the present application, when the described component is in a regular pattern, the center of the described component is the geometric center of the component, and when the described component is in an irregular pattern, the center of the described component is the geometric center of the component. For example, when the component being described is annular, the center of the component is the center of the annular ring.

The wireless charging coil in the wireless charging base 300 and the wireless charging coil in the electronic equipment such as a mobile phone, a tablet computer and the like mainly adopt a planar coil, and the wireless charging coil in the electronic equipment 400 is arranged in the middle of the electronic equipment 400, so that the centers of the wireless charging coil in the electronic equipment 400 and the wireless charging coil of the wireless charging base 300 are aligned. For example, in the embodiment shown in fig. 3, the two wireless charging coils may be aligned by visual inspection. As another example, in the embodiment shown in fig. 4 and 5, the electronic device 400 may be positioned by a support step 301 on the wireless charging base 300 to align the two wireless charging coils.

The electronic stylus 200 is constrained by its design framework, 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, and it is difficult for a consumer to confirm the position of the wireless charging coil 1001 in the electronic stylus 200, and when the wireless charging base 300 is used to wirelessly charge the electronic stylus 200, the difficulty in aligning the wireless charging coil 1001 in the electronic stylus 200 with the wireless charging coil in the wireless charging base 300 is relatively high. In addition, the wireless charging coil in the electronic stylus 200 is a solenoid coil with a magnetic core, not a planar coil, and there is a large difference between electromagnetic coupling between the solenoid coil and the planar coil and electromagnetic coupling between the planar coil and the planar coil. If the center of the solenoid coil in electronic stylus 200 is aligned with the center of the planar coil in wireless charging base 300, the coupling energy between the solenoid coil and the planar coil is very low, i.e., the coupling coefficient between the two is very small, approximately equal to 0, and the electronic stylus 200 cannot be charged effectively.

In order to charge the electronic writing pen 200 through the wireless charging base 300, the embodiment of the present application provides a wireless charging system 1000. Referring to fig. 6, fig. 6 is a schematic structural diagram of a wireless charging system 1000 according to some embodiments of the present application. 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.

Referring to fig. 7-8, fig. 7 is a schematic structural diagram of a wireless charging base 300 in the wireless charging system 1000 shown in fig. 6, and fig. 8 is an exploded view of the wireless charging base 300 shown in fig. 7. The wireless charging base 300 in this embodiment is a flat-type base. In this embodiment, the wireless charging base 300 includes a housing 302, a first charging coil 303, a first magnetic attraction 305, and a first circuit board assembly 304.

It is to be understood that fig. 7-8 and the associated figures below only schematically illustrate some of the components that wireless charging base 300 includes, and that the actual shape, actual size, actual location and actual configuration of these components are not limited by fig. 7-8 and the figures below.

The housing 302 has an accommodating space, and the housing 302 is used for protecting a structure accommodated therein. In the particular example shown in fig. 7, the housing 302 has a disc shape (which may also be referred to as a oblate cylinder shape). It will be appreciated that in other embodiments, the shape of the housing 302 may be square disk, oval disk, triangular disk, etc., without limitation.

Referring to fig. 7 and 8, the housing 302 includes opposite top and bottom plates 3021 and 3022 and a side plate 3023 connected between the top and bottom plates 3021 and 3022, and the top and bottom plates 3021 and 3022 and the side plate 3023 define the accommodating space therebetween. In some embodiments, referring to fig. 8, a top plate 3021 is connected to a side plate 3023 to form an upper cover. Specifically, the top plate 3021 and the side plate 3023 may be integrally formed as an upper cover, or may be assembled and connected together by threaded connection, clamping, adhesion, welding, or the like. The upper cover and the bottom plate 3022 may be assembled and connected together by screwing, clamping, bonding, welding, etc. Thus, during assembly, the upper cover can be integrally connected with the bottom plate 3022 as a structural member, so that the structure of the housing 302 can be simplified and the assembly difficulty can be reduced.

In other embodiments, the bottom plate 3022 may be connected to the side plate 3023 to form a bottom shell, and the bottom shell may be integrally connected to the top plate 3021 as a single structure during assembly. Alternatively, the top plate 3021 may be connected to a part of the side plate 3023 as an upper cover, the bottom plate 3022 may be connected to a part of the side plate 3023 as a bottom plate, and the upper cover may be connected to the bottom plate. In this way, the structure of the housing 302 can be simplified as well and the difficulty of assembly can be reduced.

The wireless charging dock 300 is configured to transfer power to a 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, nonmetal such as plastic, graphite, ceramic, and carbon fiber, and the nonmetal material allows the wireless charging base 300 to transmit electric energy to a side of the top plate 3021 opposite to the bottom plate 3022, so as to realize the charging function of the wireless charging base 300.

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, carbon fibers, and the like. In some embodiments, the material of the bottom plate 3022 may be selected to be metal. Specifically, the metal may be copper, iron, aluminum, copper alloy, iron alloy, aluminum alloy, or the like. In this way, the metal texture of the wireless charging base 300 can be improved, and meanwhile, the heat dissipation performance of the metal is better, so that the heat inside the wireless charging base 300 can be quickly conducted to the outside, and the heat dissipation efficiency is improved. The side plate 3023 may be made of the same material as the top plate 3021 or the same material as the bottom plate 3022.

In the charging process, the wireless charging base 300 is placed on a supporting surface such as a desktop, a counter surface, a ground surface, etc., the outer surface of the bottom plate 3022 faces the supporting surface, the top plate 3021 is located at one side of the bottom plate 3022 opposite to the supporting surface, and the equipment to be charged of the electronic stylus 200, the mobile phone, and the tablet computer is supported on the outer surface of the top plate 3021. In this embodiment, the "outer surface of the bottom plate 3022" refers to a 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 a side surface of the top plate 3021 facing away from the internal space of the housing 302.

The first charging coil 303 is located within the housing 302. Referring to fig. 9, fig. 9 is a perspective view of a first charging coil 303 of the wireless charging base 300 shown in fig. 8. The first charging coil 303 includes a first magnetically permeable plate 3031 and a first coil body 3032. The first coil main body 3032 is stacked on the first magnetic plate 3031.

Referring to fig. 8 in combination with fig. 9, the first coil body 3032 is annular. A through hole 3032a is formed at the middle of the first coil body 3032. The shape of the through hole 3032a may be circular, square, oval, triangular, polygonal, etc. The first coil body 3032 may be wound by the conductive wire along an annular trace, which may have a shape of a circular ring, a square ring, an elliptical ring, a triangular ring, a polygonal ring, or the like. The conductive wire can be copper wire, aluminum wire, gold wire and other metal wires, and also can be enameled wire. The first coil body 3032 may be a coil based on Qi wireless charging standards.

In this embodiment, the first magnetic plate 3031 has a flat plate shape. The first magnetic plate 3031 may be in a circular plate shape, a square plate shape, an oval plate shape, or the like, for example. The first magnetic plate 3031 includes opposite first and second surfaces 3031a and 3031b, the first surface 3031a facing the top plate 3021. The first coil body 3032 may be stacked on the first surface 3031a of the first magnetic plate 3031. Specifically, referring to fig. 9, the first coil body 3032 is a planar coil, and the first coil body 3032 is tiled on the first surface 3031a. The first coil body 3032 and the first magnetic plate 3031 may be fixedly connected by bonding or the like, for example.

The first magnetic conductive plate 3031 is used for converging magnetic force lines, so that the magnetic field strength of the first charging coil 303 facing the top plate 3021 can be improved, and the interference of other structures on the magnetic field can be reduced. The first magnetic plate 3031 may include a soft magnetic material. For example, the first magnetically permeable plate 3031 may include ferrite. In other embodiments, the first magnetic plate 3031 may also include at least one of soft magnetic materials such as neodymium-iron-boron (Nd-Fe-B), samarium, alnico (Al-Ni-Co), sendust (Fe-Si-Al) and permalloy (Ni-Fe), silicon steel sheets, and the like.

Referring to fig. 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 for integrating the first electronic component 3042. The first circuit board 3041 may be used to realize electrical connection between various different first electronic components 3042 inside the wireless charging base 300, and the first circuit board 3041 may be used to perform operations such as signal control, data signal processing, etc. on the first electronic components 3042. The first circuit board 3041 includes, but is not limited to, a printed circuit board (printed circuit board, PCB). The first circuit board 3041 may be a hard circuit board, a flexible circuit board, or a hard-soft combined circuit board. The first circuit board 3041 may be fixed in the housing 302 by gluing, clamping, welding, or the like.

The first electronic component 3042 includes, but is not limited to, a DC-DC power chip, a wireless charging transmitting chip (which may also be referred to as a Tx chip), a processor chip, and the like.

With continued reference to fig. 8, the first circuit board 3041 is further provided with a power interface 3043, and the housing 302 is provided with a socket 3024. The power interface 3043 may be connected to a wired charger through the outlet 3024 to receive a charging input of the wired charger. The power interface 3043 may be any one of a Type-C interface, a Micro B interface, or a POGO pin interface, for example.

Referring to fig. 10, fig. 10 is a schematic diagram of an electronic stylus 200 in the wireless charging system 1000 shown in fig. 6. Electronic stylus 200 is used to provide input to electronic devices such as tablet computers, cell phones, notebook computers, electronic readers, and the like. The electronic stylus 200 and the electronic device may be interconnected by a communication network to implement interaction of wireless signals. The communication network may be, but is not limited to: wi-Fi hotspot networks, wi-Fi peer-to-peer (P2P) networks, bluetooth networks, zigbee networks, or near field communication (near field communication, NFC) networks.

The electronic stylus 200 may be an inductive pen or a capacitive pen. Capacitive pens may include passive capacitive pens and active capacitive pens. Passive capacitive pens may be referred to as passive capacitive pens and active capacitive pens may be referred to as active capacitive pens.

Referring to fig. 10-11, fig. 11 is an exploded view of the electronic stylus 200 shown in fig. 10. The electronic stylus 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.

It will be appreciated that fig. 10, 11 and the following related figures are merely illustrative of some of the components included in electronic stylus 200, the actual shape, actual size, actual location and actual configuration of which are not limited by fig. 10, 11 and the following figures. For example, in other embodiments, electronic stylus 200 may include a microphone, speaker, audio generator, vibrator, camera, data port, and other devices, depending on the actual needs.

Referring to fig. 10-11, the housing 202 includes a barrel 2021, a nib 2022, and a rear cover 2023. Referring to fig. 11, the pen holder 2021 has a first end 2021a and a second end 2021b opposite to each other in a length direction (e.g., a direction e1 in fig. 10 and 11) thereof. The inside of the cartridge 2021 is hollow to form an accommodation space in which the second circuit board assembly 203, the first battery 204, the second charging coil 205, and the like are disposed. The material of the barrel 2021 includes, but is not limited to, metal or plastic.

In order to facilitate the user to hold the electronic stylus 200, referring to fig. 10-11, the outer circumferential surface of the pen shaft 2021 includes a first plane 2021c. In this embodiment, the first plane 2021c is one, and the barrel 2021 further includes a first cambered surface 2021d, and the outer peripheral surface of the barrel 2021 is defined by the first plane 2021c and the first cambered surface 2021 d. It will be appreciated that in other embodiments, the first plane 2021c may be plural, and the plural first planes 2021c may be arranged in the circumferential direction of the pen case.

Referring to fig. 10 and 11, a nib 2022 is disposed at a first end 2021a of the barrel 2021. The nib 2022 is configured to mate with a contact surface (e.g., a touch screen) external to the electronic stylus 200. Referring to fig. 11, nib 2022 includes oppositely disposed writing end 2022a and connecting end 2022b. When the user holds the electronic stylus 200, the writing end 2022a of the pen tip 2022 may be used to contact the touch screen and input information to the touch screen. The writing end 2022a of the nib 2022 may be provided as a spherical surface to improve smoothness of sliding of the nib 2022.

The rear cover 2023 is disposed at the second end 2021b of the barrel 2021. The rear cover 2023 and the pen holder 2021 may be connected by plugging, clamping, screwing, bonding, etc. It will be appreciated that in other embodiments, the back cover 2023 and the barrel 2021 may be integrally formed. Alternatively, in still other embodiments, the back cover 2023 may be replaced with a nib 2022, in which case the electronic stylus 200 is a dual-nib electronic stylus.

Referring to 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 for integrating the second electronic component 2032. The second circuit board 2031 may be used for making electrical connection between a plurality of different second electronic components 2032 inside the electronic stylus 200, and the second circuit board 2031 may be used for performing operations such as signal control, data signal processing, and the like on the second electronic components 2032. The second circuit board 2031 includes, but is not limited to, a printed circuit board (printed circuit board, PCB). The second circuit board 2031 may be a hard circuit board, a flexible circuit board, or a hard and soft combined circuit board. The second circuit board 2031 may be fixed within the housing 202 by gluing, clamping, soldering, or the like.

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

The second wireless communication module is used for supporting data exchange between the electronic stylus 200 and the electronic device, and between the electronic device and the wireless charging base 300, including Bluetooth (BT), global navigation satellite system (global navigation satellite system, GNSS), wireless local area network (wireless local area networks, WLAN) (e.g. wireless fidelity (wireless fidelity, wi-Fi) network), frequency modulation (frequency modulation, FM), short-range wireless communication technology (near field communication, NFC), infrared technology (IR), and the like.

In some embodiments, the second wireless communication module may include a bluetooth chip. The electronic stylus 200 may be paired with and establish a wireless connection with a bluetooth chip of an electronic device, the wireless charging dock 300, etc. through the bluetooth chip, so as to implement wireless communication between the electronic stylus 200 and the electronic device, the wireless charging dock 300 through the wireless connection. In addition, the second wireless communication module may further include an antenna, and the second wireless communication module receives electromagnetic waves via the antenna, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the second processor. The second wireless communication module can also receive the signal to be transmitted from the second processor, frequency-modulate and amplify the signal, and convert the signal into electromagnetic waves to radiate through the antenna.

The first battery 204 is used to supply power to the second circuit board 2031. The first battery 204 may include, but is not limited to, a nickel cadmium battery, a nickel hydrogen battery, a lithium battery, an alkaline battery, or other types of batteries. In addition, the number of the first batteries 204 in the embodiment of the present application may be plural or one.

The second charging coil 205 may be coupled with the first charging coil 303 of the wireless charging base 300 to generate an induced current to enable transmission of electric power. The second charging coil 205 is disposed within the housing 202. Specifically, the second charging coil 205 may be disposed in the pen shaft 2021, and the second charging coil 205 may be electrically connected to the second circuit board 2031.

Referring to fig. 12, fig. 12 is a perspective view of a second charging coil 205 of the electronic stylus 200 shown in fig. 11. The second charging coil 205 is a solenoid coil with a magnetic core, which may also be referred to as a bar magnet coil. Specifically, the second charging coil 205 includes a magnetic core 2051 and a second coil body 2052 wound around the magnetic core 2051.

The magnetic core 2051 is used for converging magnetic force lines, and can improve energy transmission efficiency. To reduce losses in the core 2051, the core 2051 may be formed from a soft magnetic material. The material of the magnetic core 2051 may be designed with reference to the material of the first magnetic conductive plate 3031 described above, and will not be described in detail herein. Referring to fig. 11 and 12, the magnetic core 2051 has a long shape, and when the second charging coil 205 is assembled into the housing 202 of the electronic pen 200, a length direction (e.g., e2 direction in fig. 12) of the magnetic core 2051 may coincide with a length direction (e.g., e1 direction in fig. 10) of the housing 202.

The second coil main body 2052 is wound around the outer peripheral surface of the magnetic core 2051. The second coil body 2052 may have a solenoid shape. The second coil body 2052 may be wound around the outer peripheral surface of the magnetic core 2051 along the longitudinal direction of the magnetic core 2051 by a conductive wire. The conductive wire can be copper wire, aluminum wire, gold wire and other metal wires, and also can be enameled wire.

In order to improve the coupling coefficient between the first charging coil 303 and the second charging coil 205, the wireless charging base 300 charges the electronic writing pen 200, please refer to fig. 8, the wireless charging base 300 further includes a first magnetic attraction member 305, and meanwhile, please refer to fig. 11, the electronic writing pen 200 further includes a second magnetic attraction member 206, and the first magnetic attraction member 305 can be magnetically attracted to the second magnetic attraction member 206. The second magnetic attraction member 206 and the second charging coil 205 may be arranged in the length direction of the electronic stylus 200.

Referring to fig. 13, fig. 13 is a schematic diagram illustrating a wireless charging base 300 of the wireless charging system 1000 shown in fig. 6 for wirelessly charging the electronic stylus 200. The first and second magnetic attractors 305, 206 are configured such that when the first magnetic attractor 305 magnetically attractes with the second magnetic attractor 206, an orthographic projection of the second charging coil 205 on the first surface 3031a of the first magnetic plate 3031 overlaps an orthographic projection of the first coil body 3032 on the first surface 3031a of the first magnetic plate 3031.

Referring to fig. 14 and 15a, fig. 14 is a schematic diagram of a positional relationship among the first charging coil 303, the first magnetic attraction member 305, the second charging coil 205, and the second magnetic attraction member 206 when the wireless charging base 300 performs wireless charging on the electronic stylus 200 in the wireless charging system 1000 shown in fig. 6, and fig. 15a is a top view of the schematic diagram of the positional relationship shown in fig. 14. The top view shown in fig. 15a is a schematic view of the electronic stylus 200 looking toward the wireless charging base 300. Specifically, the front projection of the first coil body 3032 on the first surface 3031a of the first magnetic conductive plate 3031 is a first projection, the front projection of the second charging coil 205 on the first surface 3031a of the first magnetic conductive plate 3031 is a second projection, and the first projection and the second projection overlap.

In this way, the charging position of the electronic stylus 200 can be positioned by the magnetic attraction cooperation of the first magnetic attraction piece 305 and the second magnetic attraction piece 206, so that the first charging coil 303 and the second charging coil 205 have a better coupling state, and the stable charging of the electronic stylus 200 by the wireless charging base 300 is realized.

Therefore, the wireless charging base 300 in the embodiment of the application not only can be used for wirelessly charging electronic equipment such as a tablet computer and a mobile phone, but also can be used for wirelessly charging the electronic stylus 200, so that the function of the wireless charging base 300 can be expanded, the charging scene of the electronic stylus 200 can be expanded, and the charging convenience of the electronic stylus 200 can be improved.

In some embodiments, referring to fig. 15a, in order to increase the coupling coefficient between the first charging coil 303 and the second charging coil 205, the first coil body 3032 includes a first extension 3032g, and the first extension 3032g is located on an annular extension path of the first coil body 3032.

The front projection of the first coil body 3032 on the first surface 3031a overlaps with the front projection of the first extension 3032g on the first surface 3031 a. In the example shown in fig. 15a, the first extension 3032g is covered by the second charging coil 205, so the first extension 3032g is illustrated with a dashed line.

The extending direction of the central axis P1 of the second coil body 2052 is a first direction, and the extending direction of the first extension 3032g is a second direction, and the first direction is different from the second direction. Illustratively, in the example shown in fig. 15a, the first direction extends in a horizontal direction, the first extension is a straight line segment, and the extension direction of the first extension 3032g is a vertical direction.

Referring to fig. 15b, fig. 15b is a schematic diagram of an induced magnetic field generated by the first charging coil 303 of the wireless charging system shown in fig. 13. Since the first direction is different from the second direction, 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 in the first direction to generate an induced current on the second coil body 2052, so as 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 in the first direction, and/or include magnetic lines of force having a component extending in the first direction.

On this basis, in order to enable more magnetic lines of force to pass through the second coil body 2052 in the first direction, referring to fig. 15a, the first extension 3032g includes a straight line segment, and an included 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. Illustratively, the included angle between the first direction and the second direction may 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 ensured, thereby being beneficial to improving the charging efficiency of the wireless charging base 300 to the electronic stylus 200.

In other embodiments, when the first extension 3032g includes an arcuate segment, the angle between the first direction and a tangent to the first extension 3032g is greater than or equal to 60 degrees and less than or equal to 120 degrees. Illustratively, the included angle between the first direction and the tangent of the first extension 3032g may 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 that the coupling coefficient between the first charging coil 303 and the second charging coil 205 can be ensured, and the charging efficiency of the wireless charging base 300 on the electronic stylus 200 can be improved.

Referring to fig. 14, a central axis P1 of the second coil body 2052 intersects with a central axis P2 of the through hole 3032 a. That is, when the first extension 3032g includes a straight line segment, the angle between the extending direction (i.e., the first direction) of the central axis P1 of the second coil body 2052 and the extending direction of the first extension 3032g is 90 degrees. When the first extension 3032g includes an arc segment, an angle between the extension direction (i.e., the first direction) of the central axis P1 of the second coil body and the tangent line of the first extension is 90 degrees. In this way, the number of magnetic lines of force passing through the second coil body 2052 in the first direction can be further increased, so that the coupling coefficient between the first charging coil 303 and the second charging coil 205 can be further increased, and the charging efficiency can be improved.

In some embodiments, when the first charging coil 303 is in an operating state, the magnetic field strength of the region corresponding to the first coil body 3032 may be uneven. Specifically, referring to fig. 14 and 15a, the first coil body 3032 includes an outer coil 3032b, a middle coil 3032c and an inner coil 3032d sequentially arranged in a radial direction of the first coil body 3032, wherein the outer coil 3032b is located at a side of the middle coil 3032c remote from the through hole 3032a, and the inner coil 3032d is located at a side of the middle coil 3032c close to the through hole 3032 a. The number of turns of the outer ring coil 3032b, the middle ring coil 3032c and the inner ring coil 3032d may be one or more turns, and the number of turns of the outer ring coil 3032b, the number of turns of the middle ring coil 3032c and the number of turns of the inner ring coil 3032d may be the same or different.

The magnetic field strength of the region where the outer coil 3032b is located is a first strength, the magnetic field strength of the region where the middle coil 3032c is located is a second strength, the magnetic field strength of the region where the inner coil 3032d 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 205 on the first magnetic plate 3031 overlaps the orthographic projection of the middle coil 3032c on the first surface 3031a of the first magnetic plate 3031. In this way, a region where the first coil main body 3032 and the second charging coil 205 are aligned can be ensured to have a higher magnetic field strength, the number of magnetic induction lines passing through the second coil main body 2052 along the first direction can be ensured, and thus the charging efficiency of the electronic pen 200 can be improved.

With continued reference to fig. 15a, the front projection of the second charging coil 205 on the first surface 3031a overlaps the front projection of the outer ring coil 3032b on the first surface 3031a, and the front projection of the second charging coil 205 on the first surface 3031a overlaps the front projection of the inner ring coil 3032d on the first surface 3031 a. In this way, during the charging process, uniformity and symmetry of the magnetic field environment in which the second charging coil 205 is located can be ensured, and an 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 main body 3032 on the first surface 3031a can be advantageously increased, so that the number of magnetic induction lines passing through the second coil main body 2052 along the first direction can be further increased, thereby being advantageous for further improving the charging efficiency.

In some embodiments, referring to fig. 14, the magnetic core 2051 includes a first end surface 2051a and a second end surface 2051b that are opposite in the axial direction thereof, the first coil main body 3032 includes a first inner circumferential surface 3032e and a first outer circumferential surface 3032f that are opposite, and the first inner circumferential surface 3032e is located on a side of the first outer circumferential surface 3032f near the through hole 3032 a. When the first magnetic attraction member 305 magnetically engages with the second magnetic attraction member 206, the first end surface 2051a of the magnetic core 2051 is positioned on the side of the first inner peripheral surface 3032e close to the through hole 3032a, and the second end surface 2051b of the magnetic core 2051 is positioned on the side of the first outer peripheral surface 3032f remote from the through hole 3032 a. That is, the length of the magnetic core 2051 is greater than the width of the first coil main body 3032. Here, the length of the magnetic core 2051 in the embodiment of the present application refers to the dimension 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 main body 3032 may be the distance between the first inner peripheral face 3032e and the first outer peripheral face 3032 f. In this way, the overlapping area between the second charging coil 205 and the first coil main body 3032 can be increased, which is advantageous in increasing the number of magnetic induction lines passing through the second coil main body 2052 in the first direction, so that the coupling coefficient between the first charging coil 303 and the second charging coil 205 can be increased, and the charging efficiency can be improved.

For example, referring to fig. 15a, in this embodiment, the through hole 3032a of the first coil body 3032 is substantially square, and the extension path of the first coil body 3032 is substantially square ring. The side length a1 of the first inner peripheral surface 3032e of the first coil main body 3032 is 19mm, that is, the side length of the through hole 3032a is 19mm, the side length a2 of the first outer peripheral surface 3032f is 48mm, and the width of the first coil main body 3032 is 14.5mm. The length L1 of the core 2051 is 16mm. The calculation formula of the width of the first coil main body 3032 is as follows: (side length a2 of the first outer peripheral surface 3032 f-side length a 1)/2 of the first inner peripheral surface 3032 e.

It will be appreciated that in other embodiments, the length L1 of the magnetic core 2051 may be less than or equal to the width of the first coil body 3032, in which case the orthographic projection of the second charging coil 205 on the first magnetic plate 3031 may be entirely located on the orthographic projection of the first coil body 3032 on the first magnetic plate 3031. Specifically, the first end 2021a surface and the second end 2021b surface of the core 2051 are each located between the first inner peripheral surface 3032e and the first outer peripheral surface 3032 f.

In order to further ensure the uniformity and symmetry of the magnetic field environment in which the second charging coil 205 is located, as shown in fig. 15a, the distance between the first end surface 2051a and the first inner peripheral surface 3032e is a first distance d1, the distance between the second end surface 2051b and the first outer peripheral surface 3032f is a second distance d2, and the difference between the first distance d1 and the second distance d2 is greater than or equal to-2 mm and less than or equal to 2mm. That is, -2mm is less than or equal to d1-d2 is less than or equal to 2mm. By way of example, the difference between the first spacing d1 and the second spacing d2 may be-2 mm, -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.

In some embodiments, in order to further increase the coupling coefficient between the first charging coil 303 and the second charging coil 205, referring to fig. 16, fig. 16 is a schematic diagram of the wireless charging base 300 of the wireless charging system 1000 shown in fig. 13 for wirelessly charging the electronic stylus 200. When the first magnetic attraction member 305 is magnetically attracted to the second magnetic attraction member 206, the first coil body 3032 and the second coil body 2052 have a third distance d3, and the third distance 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 distance d3 is greater than or equal to 1mm. Illustratively, 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.

In this way, the processing difficulty of the wireless charging base 300 and the electronic stylus 200 can be reduced while the larger coupling coefficient between the first charging coil 303 and the second charging coil 205 is ensured, the engineering realizability is strong, and the thickness of the wireless charging base 300 and the outer diameter size of the electronic stylus 200 are reduced.

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

In some embodiments, referring to fig. 17, fig. 17 is an enlarged view of the area a of fig. 16. The minimum distance between the first coil main body 3032 and the outer surface of the top plate 3021 is a fourth distance d4, and the fourth distance d4 is less than or equal to 2mm. Here, the minimum distance between the first coil main body 3032 and the outer surface of the top plate 3021 refers to the minimum value of the distance between the first coil main body 3032 and the outer surface of the top plate 3021. By way of example, the fourth spacing d4 may be 2mm, 1.8mm, 1.6mm, 1.7mm, 1.5mm, 1.2mm, 1mm, 0.8mm, 0.77mm, 0.7mm, etc. Thus, the distance between the first charging coil 303 and the second charging coil 205 is reduced, the thickness of the wireless charging base 300 is reduced, the light and thin design of the wireless charging base 300 is realized, and the wireless charging base 300 is convenient to store and carry.

With continued reference to fig. 17, the minimum distance between the second coil body 2052 and the outer circumferential surface of the barrel 2021 is a fifth distance d5, and the fifth distance d5 is less than or equal to 1mm. Here, the minimum distance between the second coil body 2052 and the outer circumferential surface of the barrel 2021 means the minimum value of the distance between the second coil body 2052 and the outer circumferential surface of the barrel 2021. Illustratively, the fifth spacing d5 may be 1mm, 0.9mm, 0.8mm, 0.77mm, 0.7mm, 0.6mm, 0.5mm, etc. In this way, the distance between the first charging coil 303 and the second charging coil 205 is advantageously reduced, and the radial dimension of the outer peripheral surface of the electronic stylus 200 is advantageously reduced, so that the user can hold the electronic stylus 200.

In some embodiments, referring to fig. 13-16, the first magnetic attraction member 305 is disposed on the first magnetic plate 3031. For example, referring to fig. 13 and 15a, the first magnetic attraction member 305 may be fixedly connected to the first surface 3031a of the first magnetic plate 3031 by adhesion, clamping, or the like. Specifically, the first magnetic attraction member 305 may be disposed in the through hole 3032a of the first coil body 3032.

Thus, by disposing the first magnetic attraction member 305 in the through hole 3032a, on the one hand, the first magnetic attraction member 305 is surrounded by the first coil main body 3032, and the second charging coil 205 is located on the side of the second magnetic attraction member 206 close to the pen tip 2022 or on the side of the second magnetic attraction member 206 close to the rear cover 2023, so that the front projection of the second charging coil 205 on the first surface 3031a of the first magnetic conductive plate 3031 overlaps the front projection of the first coil main body 3032 on the first surface 3031a of the first magnetic conductive plate 3031, thereby facilitating the coupling between the first charging coil 303 and the second charging coil 205; on the other hand, the space in the middle of the first coil main body 3032 can be fully utilized, so that the structure of the wireless charging base 300 is more compact, the whole volume of the wireless charging base 300 is reduced, and the miniaturization design of the wireless charging base 300 is realized; on the other hand, the magnetic field strength in the through hole 3032a of the first coil main body 3032 is low (i.e., the magnetic induction density is low), and the first magnetic attraction member 305 is disposed in the through hole 3032a, so that the interference of the first magnetic attraction member 305 on the induced magnetic field can be reduced.

It will be appreciated that in other embodiments, first magnetic attraction 305 may also be secured to an inner or outer surface of top plate 3021. Here, the "inner surface of the top plate 3021" refers to a side surface of the top plate 3021 facing the inner space of the housing 302.

In some embodiments, referring to fig. 14-16, the first magnetic attraction member 305 is elongated. The length direction of the first magnetic attraction member 305 may be any direction parallel to the first surface 3031a of the first magnetic conductive plate 3031. For example, the first magnetic attraction member 305 may have a rectangular parallelepiped shape. Thus, the volume of the first magnetic attraction piece 305 is increased, so that the magnetic attraction force between the first magnetic attraction piece 305 and the second magnetic attraction piece 206 is increased, the position stability of the electronic stylus 200 in the charging process can be improved, and the stability of the charging process can be improved.

The first magnetic attraction member 305 may be a permanent magnet or an electromagnet. In some embodiments, referring to fig. 18, fig. 18 is another schematic diagram of the wireless charging base 300 shown in fig. 7. The first magnetic attraction member 305 is spaced from the first coil main body 3032. That is, the first magnetic attraction member 305 is disposed apart from the first coil main body 3032. In this way, the first magnetic attraction member 305 can be prevented from interfering with the induced magnetic field between the first charging coil 303 and the second charging coil 205, so that charging stability and charging efficiency can be ensured.

In some embodiments, referring to fig. 18, the spacing between the first magnetic attraction 305 and the first coil body 3032 is a sixth spacing d6, and the sixth spacing d6 is greater than or equal to 3mm. In this embodiment, the first magnetic attraction member 305 is located in the through hole 3032a, and the sixth pitch d6 refers to the pitch between the first magnetic attraction member 305 and the first inner peripheral surface 3032e of the first coil main body 3032. In this way, interference of the induced magnetic field by the first magnetic attraction member 305 can be avoided.

On this basis, in order to allow both the distance between the first magnetic attraction member 305 and the first coil main body 3032 and the length dimension of the first magnetic attraction member 305, the sixth distance d6 between the first magnetic attraction member 305 and the first coil main body 3032 may be less than or equal to 5mm. Illustratively, the sixth spacing d6 may be 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, 4.5mm, 5mm, etc. In this way, on one hand, the first magnetic attraction piece 305 can be prevented from interfering the induction magnetic field between the first charging coil 303 and the second charging coil 205, and on the other hand, the length of the first magnetic attraction piece 305 is increased, the volume of the first magnetic attraction piece 305 is ensured, and therefore the magnetic attraction force between the first magnetic attraction piece 305 and the second magnetic attraction piece 206 can be ensured.

In some embodiments, referring to fig. 18, an orthographic projection of the center of first magnetic attraction 305 on first surface 3031a covers an orthographic projection of center O1 of through hole 3032a on first surface 3031 a. Since the magnetic induction density at the through hole 3032a is the lowest, the orthographic projection of the center O1 of the first magnetic attraction 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, so that the interference of the first magnetic attraction member 305 on the induced magnetic field can be reduced.

In some embodiments, the center Q1 of first magnetic attraction 305 is orthographic projected on first surface 3031a and the center O1 of through hole 3032a is orthographic projected on first surface 3031 a. That is, the center Q1 of the first magnetic attraction 305 is aligned with the center O1 of the through hole 3032 a. In this way, the spacing between the first magnetic attraction member 305 and the first coil main body 3032 is facilitated to be increased, while the length of the first magnetic attraction member 305 is facilitated to be increased. In addition, the magnetic induction density at the through hole 3032a is the lowest, and the center Q1 of the first magnetic attraction member 305 is set to coincide with the center O1 of the through hole 3032a, so that the interference of the first magnetic attraction member 305 on the induced magnetic field can be further reduced.

For example, referring to fig. 18, in this embodiment, the side length of the through hole 3032a (that is, the side length a1 of the first inner peripheral surface 3032 e) is 19mm, the length L2 of the first magnetic attraction member 305 is 12mm, and after the center Q1 of the first magnetic attraction member 305 is set to coincide with the center O1 of the through hole 3032a, the distance between the first magnetic attraction member 305 and the first coil main body 3032 is at least 3.5mm, so that the requirement that the distance between the first magnetic attraction member 305 and the first coil main body 3032 is greater than or equal to 3mm can be satisfied.

On the basis of any of the above embodiments, the first magnetic attraction member 305 and the second magnetic attraction member 206 are halbach array magnets. The halbach array magnet can converge magnetic force lines on one side of the magnet and weaken the magnetic force lines on the other side by arranging the magnets in different magnetizing directions according to a certain rule, so that a relatively ideal unilateral magnetic field is obtained. In this way, by providing the first magnetic attraction member 305 and the second magnetic attraction member 206 as halbach array magnets, the magnetic attraction force between the first magnetic attraction member 305 and the second magnetic attraction member 206 can be improved, which is advantageous for improving the adsorption reliability between the wireless charging base 300 and the electronic stylus 200.

Specifically, referring to fig. 16, the first magnetic attraction member 305 includes a first magnetic portion 3051, a second magnetic portion 3052, and a third magnetic portion 3053. The first, second and third magnetic parts 3051, 3052 and 3053 are sequentially arranged in the third direction. The third direction is parallel to the first surface 3031a of the first magnetic plate 3031. The magnetizing direction of the first magnetic portion 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. The magnetic pole of the second magnetic portion 3052 facing the end of the first magnetic portion 3051 is the same as the magnetic pole of the end of the first magnetic portion 3051 facing away from the first magnetic plate 3031.

For example, referring to fig. 16, the magnetic pole of the first magnetic portion 3051 facing the end of the first magnetic plate 3031 may be N pole, and the magnetic pole of the end of the first magnetic portion 3051 facing away from the first magnetic plate 3031 may be S pole. In this case, the magnetic pole of the second magnetic portion 3052 toward one end of the first magnetic portion 3051 is an S pole, and the magnetic pole of the second magnetic portion 3052 toward one end of the third magnetic portion 3053 is an N pole. The magnetic pole of the third magnetic portion 3053 facing one end of the first magnetic plate 3031 is an S pole, and the magnetic pole of the third magnetic portion 3053 facing one end of the first magnetic plate 3031 is an N pole.

With continued reference to fig. 16, the second magnetic element 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 this order in the longitudinal direction of the electronic stylus 200. The fourth magnetic portion 2061 is configured to magnetically engage with the first magnetic portion 3051, the sixth magnetic portion 2063 is configured to magnetically engage with the third magnetic portion 3053, the magnetization direction of the fifth magnetic portion 2062 is perpendicular to the magnetization direction of the fourth magnetic portion 2061, and the magnetic pole of the end of the fifth magnetic portion 2062 near the fourth magnetic portion 2061 is the same as the magnetic pole of the end of the fourth magnetic portion 2061 facing the first magnetic portion 3051.

For example, referring to fig. 16, when the electronic stylus 200 is attached to the wireless charging stand, 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.

It is understood that in other embodiments, first magnetic attraction 305 and second magnetic attraction 206 may be a single magnet.

In some embodiments, the second magnetic element 206 may be disposed opposite the first plane 2021c of the pen housing, and the electronic stylus 200 may be supported on the wireless charging base 300 by 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.

In order to reduce the positioning difficulty between the electronic stylus 200 and the wireless charging base 300, referring to fig. 16, two second magnetic attraction pieces 206 are provided, and the two second magnetic attraction pieces 206 are respectively disposed at two sides of the second charging coil 205. In this way, any one of the two second magnetic attraction pieces 206 is magnetically attracted to the first magnetic attraction piece 305, so that the electronic stylus 200 can be positioned, a charging scene of the electronic stylus 200 through the wireless charging base 300 can be expanded, the probability of successful alignment of the electronic stylus 200 and the wireless charging base 300 can be improved, and the positioning difficulty between the electronic stylus 200 and the wireless charging base 300 can be reduced.

In some embodiments, the two second magnetic attraction members 206 are symmetrically disposed with respect to the second charging coil 205. Thus, when the electronic stylus 200 is attracted to the wireless charging base 300 along the first direction, one of the second magnetic attraction members 206 can magnetically attract and cooperate with the first magnetic attraction member 305, and when the electronic stylus 200 is attracted to the wireless charging base 300 along the second direction, the other of the second magnetic attraction members can magnetically attract and cooperate with the first magnetic attraction member 305. Wherein the first orientation is opposite to the second orientation.

Specifically, when the electronic stylus 200 is attracted to the wireless charging dock 300 in the first orientation and the second orientation, the orientation of the nib 2022 of the electronic stylus 200 is reversed. That is, the first end 2021a of the barrel 2021 is opposite in orientation. For example, in the example shown in fig. 16, the electronic stylus 200 is attracted to the wireless charging base 300 in a first orientation, and the second magnetic attraction member 206 of the two second magnetic attraction members 206 away from the nib 2022 magnetically attracts and cooperates with the first magnetic attraction member 305, when the nib 2022 of the electronic stylus 200 faces to the right. As another example, referring to fig. 19a and 19b, fig. 19a is a schematic diagram of another charging scenario of the wireless charging system 1000 shown in fig. 6, and fig. 19b is another schematic diagram of the charging scenario shown in fig. 19 a. In the example shown in fig. 19a and 19b, the electronic stylus 200 is attracted to the wireless charging base 300 in the second orientation, and the second magnetic attraction member 206 near the nib 2022 of the two second magnetic attraction members 206 magnetically attracts and cooperates with the first magnetic attraction member 305, so that the nib 2022 of the electronic stylus 200 faces to the left.

It is understood that in other embodiments, the electronic stylus 200 may be attached to the wireless charging base 300 in a first orientation, the nib 2022 of the electronic stylus 200 may be left, and the electronic stylus 200 may be attached to the wireless charging base 300 in a second orientation, and the nib 2022 of the electronic stylus 200 may be right.

In this way, no matter the electronic stylus 200 is adsorbed on the wireless charging base 300 in the first direction or adsorbed on the wireless charging base 300 in the second direction, the coupling of the first charging coil 303 and the second charging coil 205 can be realized, and the stable charging of the electronic stylus 200 by the wireless charging base 300 can be realized, so that the charging scene of the electronic stylus 200 can be expanded, and the charging convenience of the electronic stylus 200 can be improved.

Moreover, since the two second magnetic attraction pieces 206 are symmetrically disposed with respect to the second charging coil 205, the pitches between the different second magnetic attraction pieces 206 and the second charging coil 205 are equal. Referring to fig. 19b, the distance between the second magnetic element 206 and the second charging coil 205 near the nib 2022 is a seventh distance d7, the distance between the second magnetic element 206 and the second charging coil 205 far from the nib 2022 is an eighth distance d8, and the seventh distance d7 is equal to the eighth distance d 8. That is, the symmetry axes of the two second magnetic attraction pieces 206 pass through the center of the second charging coil 205. Thus, when the electronic stylus 200 is adsorbed on the wireless charging base 300 in the second orientation, the overlapping area of the first projection (i.e., the orthographic projection of the first coil body 3032 on the first magnetic plate 3031) and the second projection (i.e., the orthographic projection of the second charging coil 205 on the first magnetic 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, so that the electronic stylus 200 can have the same coupling coefficient under the two different charging scenarios, and the charging efficiency can be ensured.

On the basis of any of the above embodiments, in order to facilitate the user to understand the charging condition of the electronic stylus 200, the wireless charging base 300 further includes an indicator lamp (not shown) 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 a first color, it indicates that the wireless charging system 1000 is in a charging state, when the indicator light displays a second color, it indicates that the electronic device 400 and the electronic stylus 200 are biased or blocked by foreign objects, and cannot be charged normally, and when the indicator light displays a third color, it indicates that the electronic device 400 and the electronic stylus 200, such as a mobile phone and a tablet computer, are charged. Wherein the first color, the second color and the third color are respectively different colors. For example, the first color may be green, the second color may be red, and the third color may be yellow.

Thus, by setting the indicator lamp on the wireless charging base 300, the user can timely and clearly know the working state of the wireless charging system 1000 through the display condition of the indicator lamp, so as to improve the experience of the user.

It will be appreciated that in other embodiments, the wireless charging system 1000 may also alert the user of the charging of the electronic stylus 200 in other ways. For example, in other embodiments, the wireless charging dock 300 may also alert the user of the charging event via a voice prompt. For example, the voice prompt module may send out voices of "charged complete", "current electric quantity is xx%" according to the charging condition of the electronic stylus 200. As another example, in still other embodiments, electronic stylus 200 may send information of the power status of electronic stylus 200 to an electronic device capable of wireless communication therewith and output a reminder on the electronic device. The prompt information may be popup information, voice message, etc.

Referring to fig. 20, fig. 20 is a diagram showing a simulation relationship between a distance between a center of the second charging coil 205 and a center of the through hole 3032a and a coupling coefficient between the first charging coil 303 and the second charging coil 205 according to some embodiments of the present application. The map may be obtained by simulation of the electromagnetic field between the first charging coil 303 and the second charging coil 205 by simulation software. At the time of the simulation test, the interval between the first coil body 3032 and the second coil body 2052 is set to 3mm, and it is ensured that the central axis P1 of the second coil body 2052 intersects with the central axis P2 of the through hole 3032 a.

For convenience in explaining the distance between the center of the second charging coil 205 and the center of the through hole 3032a, please refer to fig. 21-22, fig. 21 is a schematic diagram illustrating the positional relationship between the first charging coil 303 and the second charging coil 205 provided in some embodiments of the present application, and fig. 22 is another schematic diagram illustrating the positional relationship between the first charging coil 303 and the second charging coil 205 provided in some embodiments of the present application. As shown in fig. 21 and 22, the center of the through hole 3032a is O1, the center of the second charging coil 205 is O2, and the distance d by which the center of the second charging coil 205 is offset 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 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 plate 3031.

As can be seen from fig. 20, 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 minimum, and at this time, the value of the coupling coefficient is 0, and no energy transmission can be performed 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.

With continued reference to fig. 20, when the center O2 of the second charging coil 205 is offset 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 tends to change from increasing to decreasing. In particular, in this embodiment, referring to fig. 21, when the side length a1 of the first inner peripheral surface 3032e of the first coil main body 3032 is 19mm, the side length a2 of the first outer peripheral surface 3032f is 48mm, and the length L1 of the second charging coil 205 is 16mm, the coupling coefficient between the first charging coil 303 and the second charging coil 205 is maximum when the center of the second charging coil 205 is offset from the center of the through hole 3032a by about 15mm, and the value of the coupling coefficient is about 0.26, and energy transmission can be performed 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 to 147k.

In a practical product, when the interval between the first coil main body 3032 and the second coil main body 2052 is set to be less than 3mm, the value of the coupling coefficient can reach more than 0.26. In addition, under the simulation conditions of the embodiment shown in fig. 20, the results of the simulation of the electromagnetic fields of the first charging coil 303 and the second charging coil 205 after the first magnetic attraction member 305 is disposed in the through hole 3032a are almost identical to those of the embodiment shown in fig. 20. That is, the coupling coefficient between the first charging coil 303 and the second charging coil 205 is hardly affected after the first magnetic attraction member 305 is provided in the through hole 3032 a.

Therefore, in the wireless charging system 1000 in the embodiment of the application, by setting the first magnetic attraction piece 305 on the wireless charging base 300 and setting the second magnetic attraction piece 206 for magnetically attracting and matching with the first magnetic attraction piece 305 in the electronic stylus 200, the charging position of the electronic stylus 200 can be positioned through the magnetically attracting and matching between the first magnetic attraction piece 305 and the second magnetic attraction piece 206, and then the electronic stylus 200 can be wirelessly charged through the wireless charging base 300. Thus, the wireless charging base 300 in the embodiment of the application not only can be used for wirelessly charging electronic devices such as a mobile phone and a tablet personal computer, but also can be used for wirelessly charging the electronic stylus 200, and the wireless charging scene of the electronic stylus 200 is expanded.

In other embodiments, in order to increase the volume of the first magnetic attraction member 305 and also consider the thickness of the wireless charging base 300, and achieve the thin design of the wireless charging base 300, referring to fig. 23, fig. 23 is an assembly schematic diagram of the first charging coil 303 and the first magnetic attraction member 305 according to other embodiments of the present disclosure. The first charging coil 303 in this embodiment is different from the first charging coil 303 in the foregoing embodiment in that a first recess 3031c is provided on the first magnetic plate 3031 of the first charging coil 303 in this embodiment, and at least a portion of the first magnetic attraction member 305 is disposed in the first recess 3031 c.

Specifically, referring to fig. 23, a first recess 3031c recessed toward a second surface 3031b is provided on a first surface 3031a of the first magnetic plate 3031. 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 recess 3031c and faces the bottom wall of the recess of the first recess 3031c. The first mating surface 305a may be fixedly attached to the bottom wall of the first recess 3031c by means of adhesive or the like. In this embodiment, the second mating surface 305b is located outside the first recess 3031c. That is, a portion of first magnetic attraction 305 is located within first recess 3031c. In this case, the size of the first flux guide 305 in the thickness direction of the first flux guide plate 3031 is larger than the size of the first recess 3031c in the thickness direction of the first flux guide plate 3031. The thickness direction of the first magnetic 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 a direction from the first surface 3031a of the first magnetic conductive plate 3031 to the second surface 3031 b.

It will be appreciated that in other embodiments, the entire first magnetic attraction member 305 may be disposed within the first recess 3031c. In this case, the dimension of the first flux guide 305 in the thickness direction of the first flux guide plate 3031 is smaller than or equal to the dimension of the first recess 3031c in the thickness direction of the first flux guide plate 3031.

In this way, by providing the first recess 3031c, the stacking dimension of the first magnetic plate 3031 and the first magnetic attraction member 305 in the thickness direction of the wireless charging base 300 can be reduced, which is favorable for reducing the thickness of the wireless charging base 300, and at the same time, the thickness of the first magnetic attraction member 305 can be increased, which is favorable for increasing the volume of the first magnetic attraction member 305, thereby being favorable for increasing the magnetic attraction force between the first magnetic attraction member 305 and the second magnetic attraction member 206.

In some embodiments, the second mating surface 305b of the first magnetic attraction 305 may be flush with a surface of the first coil body 3032 facing away from the first magnetic plate 3031. In this way, interference between the first magnetic attraction member 305 and other components of the wireless charging base 300 can be avoided, and the assembly difficulty of the wireless charging base 300 can be reduced.

It is understood that the first recess 3031c in the present embodiment may be applied to the wireless charging base 300 in any of the embodiments of the present application.

In still other embodiments, referring to fig. 24-25, fig. 24 is an exploded view of a first charging coil 303 according to still other embodiments of the present application, and fig. 25 is a schematic diagram illustrating an assembly of a first coil body 3032 and a first magnetic plate 3031 in the exploded view shown in fig. 24. The first charging coil 303 in the present embodiment is different from the first charging coil 303 of any of the above embodiments in that the first magnetically permeable plate 3031 of the first charging coil 303 in the present embodiment includes a bottom plate portion 3031d, a first side plate portion 3031e and a second side plate portion 3031f.

Referring to fig. 24, the first side plate portion 3031e is provided on one side surface of the bottom plate portion 3031d and is located on the inner peripheral side of the first coil main body 3032. That is, the first side plate portion 3031e is located in the through hole 3032a of the first coil main body 3032. The second side plate portion 3031f is disposed at one side surface of the bottom plate portion 3031d and is located at an outer peripheral side of the first coil body 3032, and 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.

In this way, the first side plate portion 3031e can block the interference of the structure (such as the first magnetic attraction member 305) located on the inner peripheral side of the first coil main body 3032 on the magnetic field of the first charging coil 303, which is advantageous in reducing the space between the first magnetic attraction member 305 and the first coil main body 3032, thereby being advantageous in increasing the volume of the first magnetic attraction member 305, improving the magnetic attraction strength between the first magnetic attraction member 305 and the second magnetic attraction member 206, and in reducing the interference of the structure (such as the side plate 3023 of the wireless charging coil 1001) on the outer peripheral side of the first coil main body 3032 on the magnetic field of the first charging coil 303, which is advantageous in increasing the magnetic field strength of the first charging coil 303, and in improving the charging efficiency. Meanwhile, the bottom plate portion 3031d, the first side plate portion 3031e, and the second side plate portion 3031f can also play a limiting role on the first coil main body 3032, so that the first coil main body 3032 is prevented from being misplaced during installation or use.

In some embodiments, referring to fig. 24, the first side plate portion 3031e is annular, and the first side plate portion 3031e is disposed around an inner peripheral side of the first coil body 3032. In this way, the blocking area of the first side plate portion 3031e can be increased, which is advantageous for further improving the charging efficiency.

With continued reference to fig. 24, the second side plate portion 3031f may be annular. In this way, the blocking area of the second side plate portion 3031f can be increased, which is advantageous for further improving the charging efficiency. It is understood that in other embodiments, the first magnetic plate 3031 may not include the first side plate portion 3031f or the second side plate portion 3031f.

Referring to fig. 26, fig. 26 is an assembly schematic diagram of the first charging coil 303 and the housing 302 of the wireless charging base 300 shown in fig. 25. In the thickness direction of the bottom plate portion 3031d (e.g., the Z-axis direction in fig. 26), an end of the first side plate portion 3031e remote from the bottom plate portion 3031d and an end of the second side plate portion 3031f remote from the bottom plate portion 3031d may be in contact with the inner surface of the top plate 3021. In this way, the first side plate portion 3031e and the second side plate portion 3031f have a large height in the thickness direction of the bottom plate portion 3031d, and the blocking area of the first side plate portion 3031e and the second side plate portion 3031f can be further increased.

In other embodiments, the end of the first side plate portion 3031e remote from the bottom plate portion 3031d and the end of the second side plate portion 3031f remote from the bottom plate portion 3031d may also be spaced apart from the inner surface of the top plate 3021, without being particularly limited thereto.

In order to reduce the difficulty in aligning the electronic device 400 with the wireless charging base 300, referring to fig. 27, fig. 27 is a schematic diagram of the wireless charging base 300 shown in fig. 7 for wirelessly charging the electronic device 400. The electronic device 400 is used as a mobile phone in this embodiment for illustration. In other embodiments, electronic device 400 may also include, but is not limited to, a tablet computer, an electronic reader, a smart wearable device, a Bluetooth headset box, and the like.

Referring to fig. 28-29, fig. 28 is a perspective view of the electronic device 400 in the schematic diagram of fig. 27, and fig. 29 is a cross-sectional view of the perspective view of fig. 28 taken along line A-A. The electronic device 400 comprises a screen 401, a back shell 402, a motherboard (not shown), a second battery 404, a third charging coil 405 and a third magnetic attraction 406. It is to be understood that fig. 28-29 and the associated figures below only schematically illustrate some of the components comprised by the electronic device 400, the actual shape, actual size, actual position and actual configuration of which are not limited by fig. 28-29 and the figures below. In addition, when the electronic device 400 is a device of some other form, the electronic device 400 may not include the screen 401.

In the embodiment shown in fig. 28, the electronic device 400 has a rectangular flat plate shape. It is understood that in other embodiments, the electronic device 400 may be circular planar, oval planar, etc.

The screen 401 is used to display images, videos, and the like. Referring to fig. 29, a screen 401 includes a light-transmitting cover plate 4011 and a display screen 4012. The light-transmitting cover plate 4011 is laminated with the display screen 4012. The light-transmitting cover plate 4011 is mainly used for protecting and dust-preventing the display screen 4012.

Referring to fig. 28 in combination with fig. 29, back shell 402 includes a back cover 4021 and a bezel 4022. The back cover 4021 is located on a side of the display screen 4012 remote from the light transmissive cover plate 4011. The frame 4022 is located between the back cover 4021 and the light-transmitting cover 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 accommodating space of the electronic device 400. The internal accommodation space accommodates the display screen 4012, the second battery 404, the main board, and the like.

Referring to fig. 28, the frame 4022 has 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, where the first long side 4022a and the second long side 4022b are opposite, and the first short side 4022c and the second short side 4022d are opposite. The frame 4022 is formed by enclosing a first long side 4022a, a first short side 4022c, a second long side 4022b, and a second short side 4022 d.

In some embodiments, referring to fig. 29, the electronic device 400 further includes a midplane 403. The middle plate 403 is fixed to the inner surface of the frame 4022 for one week. The middle plate 403 serves as a structural "skeleton" of the electronic device 400, and a motherboard, a second battery 404, and the like may be fixed to the middle plate 403. When the electronic apparatus 400 does not include the middle plate 403, the main board, the second battery 404, and the like may be fixed to the surface of the display screen 4012 facing the back cover 4021, or may be fixed to the inner surface of the back cover 4021.

The second battery 404 is used to provide electricity to electronic devices such as a display 4012, a motherboard, etc. within the electronic device 400. The main board is used for integrating the control chip.

Referring to fig. 29 and 30, fig. 30 is another schematic diagram of the electronic device 400 shown in fig. 28. The third charging coil 405 is configured to couple with the first charging coil 303 of the wireless charging base 300, where the third charging coil 405 includes a second magnetic plate 4051 and a third coil body 4052. The third coil body 4052 is stacked on the second magnetic conductive plate 4051. Specifically, referring 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 may be the same as that of the second charging coil 205, and is a planar coil, and the structure of the third charging coil 405 will not be described in detail herein.

The third magnetic attraction member 406 is configured to magnetically attract and cooperate with the first magnetic attraction member 305. When the third magnetic attraction member 406 magnetically attracts the first magnetic attraction 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 3031 a. 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. Thus, when the electronic device 400 is wirelessly charged through the wireless charging base 300, the third magnetic attraction piece 406 and the first magnetic attraction piece 305 can be magnetically attracted to be matched, so that the alignment of the charging position of the electronic device 400 is realized, the alignment difficulty of the electronic device 400 and the wireless charging base 300 can be reduced, in the charging process, the movement of the electronic device 400 can be avoided, and the stability and the reliability of the charging process can be improved.

The third magnetic attraction member 406 may be disposed on the second magnetic conductive plate 4051. For example, referring to fig. 30, a third magnetic attraction member 406 may be disposed within the central bore 4052a of the third coil body 4052. The extension direction of the third magnetic attraction member 406 may be parallel to the third surface 4051 a. For example, the extending direction of the third magnetic member 406 may be parallel to the first short side 4022c, or the extending direction of the third magnetic member 406 may be parallel to the first long side 4022 a.

The structure of the third magnetic member 406 and the positional relationship between the third magnetic member 406 and the third coil main body 4052 can be designed with reference to the structure of the first magnetic member 305 and the positional relationship between the first magnetic member 305 and the first coil main body 3032, and will not be described in detail herein.

It will be appreciated that in other embodiments, the third magnetic attraction member 406 may also be disposed on the back cover 4021. Alternatively, the third magnetic attraction member 406 may not be provided on the electronic apparatus 400. In this case, the user may achieve alignment of the third charging coil 405 and the first charging coil 303 by visual inspection or other positioning structure.

When the electronic device 400 includes the third magnetic attraction member 406, the electronic stylus 200 may also be charged by the electronic device 400. Referring to fig. 31, fig. 31 is a schematic diagram illustrating the electronic device 400 shown in fig. 30 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 the orthographic projection of the third coil main 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 may 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, which will not be described in detail herein.

While the foregoing embodiments have been described with respect to the wireless charging base 300 including one first coil body 3032, it is to be understood that in other embodiments, the wireless charging base 300 may further include a plurality of first coil bodies 3032, and different first coil bodies 3032 may be disposed on the same first magnetic plate 3031 or may be disposed on different first magnetic plates 3031. In this case, the first magnetic attraction pieces 305 may be provided in the through holes 3032a of a part of the first coil main bodies 3032, or the first magnetic attraction pieces 305 may be provided in the through holes 3032a of each of the first coil main bodies 3032. The extending directions of the first magnetic attraction pieces 305 in the different first coil main bodies 3032 may be the same or different.

For example, referring to fig. 32, fig. 32 is a schematic structural diagram of a wireless charging base 300 according to 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 housing 302, the housing 302 being disposed obliquely on the support step 301. The supporting step 301 is used for carrying electronic devices 400 such as a mobile phone and a tablet computer, and the first charging coil 303, the first circuit board assembly 304 and the like are all disposed in the housing 302.

Specifically, referring to fig. 32, the first charging coil 303 includes a first magnetic plate 3031 and two first coil main bodies 3032, and the two first coil main bodies 3032 are disposed on the first magnetic plate 3031. The through holes 3032a of the two first coil main bodies 3032 in the present embodiment are each provided with the first magnetic attraction member 305. Referring to fig. 32 and 33, the extending directions of the first magnetic attraction pieces 305 in the different first coil main bodies 3032 are the same. In other embodiments, the direction of extension of the first magnetic attraction 305 within the different first coil body 3032 may also be different.

Specifically, both of the first magnetic attraction pieces 305 in this embodiment extend in the up-down direction. It is to be understood that the extending direction of the first magnetic attraction member 305 is not limited thereto, as long as the extending direction of the first magnetic attraction member 305 is parallel to the first surface 3031a of the first magnetic plate 3031.

The wireless charging dock 300 shown in fig. 32 is described below as an example of a charging scenario of the electronic stylus 200. Referring to fig. 33, fig. 33 is a schematic diagram of a scenario in which the wireless charging base 300 shown in fig. 32 charges the electronic pen 200. For example, as shown in (a) of fig. 33, when two second magnetic attraction pieces 206 are provided in the electronic stylus 200, the two second magnetic attraction pieces 206 in the electronic stylus 200 may be magnetically attracted to be engaged with the two first magnetic attraction pieces 305 in one-to-one correspondence. In this way, the magnetic attraction matching reliability 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 in the charging process.

As another example, as shown in (b) of fig. 33, one of the two second magnetic attraction pieces 206 of the electronic stylus 200 may magnetically attract and cooperate with one of the first magnetic attraction pieces 305, and the other second magnetic attraction piece 206 of the two second magnetic attraction pieces 206 does not magnetically attract and cooperate with the first magnetic attraction piece 305.

Only two charging scenarios are shown in fig. 33, it can be appreciated that in other embodiments, a user may select the magnetic attraction positions of the electronic stylus 200 and the wireless charging base 300 according to actual situations, and may adjust the orientation of the pen tip 2022 according to actual requirements.

Referring to fig. 34, fig. 34 is a schematic diagram of a scenario in which the wireless charging base 300 shown in fig. 32 wirelessly charges the electronic device 400. For example, as shown in fig. 34 (a), the first long side 4022a of the electronic device 400 may be supported on the supporting step 301, and the third coil main body 4052 of the electronic device 400 may be aligned with the first coil main body 3032 close to the supporting step 301 to implement coupling of the third charging coil 405 and the first charging coil 303. As another example, as shown in (b) of fig. 34, the first short side 4022c of the electronic device 400 may be supported on the supporting step 301, and the third coil body 4052 of the electronic device 400 may be aligned with the first coil body 3032 remote from the supporting step 301, to achieve coupling of the third charging coil 405 and the first charging coil 303.

Referring to fig. 35, fig. 35 is a schematic diagram of a wireless charging base 300 according to still other embodiments of the present application. In this embodiment, the wireless charging base 300 includes two first coil bodies 3032, and the first magnetic attraction member 305 is provided in the through hole 3032a of one of the two first coil bodies 3032 away from the support step 301.

In this case, referring to fig. 36, fig. 36 is a schematic view of a scenario in which the wireless charging base 300 shown in fig. 35 wirelessly charges the electronic stylus 200. For example, as shown in fig. 36 (a), the electronic stylus 200 may be mated with the second magnetic attraction member 206 by means of the first magnetic attraction member 305 remote from the nib 2022. As another example, as shown in fig. 36 (b), the electronic stylus 200 may be mated with the second magnetic attraction 206 via the first magnetic attraction 305 near the nib 2022.

Referring to fig. 37, fig. 37 is a schematic view of a wireless charging base 300 according to still other embodiments of the present application. In this embodiment, the wireless charging base 300 includes two first coil bodies 3032, and the first magnetic attraction member 305 is provided in the through hole 3032a of one of the two first coil bodies 3032 adjacent to the support step 301. In this case, referring to fig. 38, fig. 38 is a schematic view of a scenario in which the wireless charging base 300 shown in fig. 37 wirelessly charges the electronic stylus 200. For example, as shown in fig. 38 (a), the electronic stylus 200 may be mated with the second magnetic attraction member 206 by means of the first magnetic attraction member 305 remote from the nib 2022. As another example, as shown in fig. 38 (b), the electronic stylus 200 may be mated with the second magnetic attraction 206 via the first magnetic attraction 305 near the nib 2022.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. A wireless charging system, comprising:

the wireless charging base comprises a first charging coil and a first magnetic attraction piece, wherein the first charging coil comprises a first magnetic conduction plate and a first coil main body, the first magnetic conduction plate comprises a first surface, and the first coil main body is arranged on the first surface in a lamination mode;

the electronic handwriting pen comprises a second charging coil and a second magnetic attraction piece, wherein the second charging coil comprises a magnetic core and a second coil main body, the second coil main body is wound on the outer peripheral surface of the magnetic core, the second magnetic attraction piece is used for being magnetically attracted to be matched with the first magnetic attraction piece, and when the second magnetic attraction piece is magnetically attracted to be matched with the first magnetic attraction piece, the orthographic projection of the second charging coil on the first surface is overlapped with the orthographic projection of the first coil main body on the first surface.

2. The wireless charging system of claim 1, wherein the first coil body is annular, the first coil body includes a first extension segment, the first extension segment is located on an annular extension path of the first coil body, an orthographic projection of the first coil body on the first surface overlaps an orthographic projection of the first extension segment on the first surface, an extension direction of a central axis of the second coil body is a first direction, an extension direction of the first extension segment is a second direction, and the first direction is different from the second direction.

3. The wireless charging system of claim 2, wherein the first extension comprises 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 section comprises an arc line, and an included angle between the first direction and a tangent line of the first extension section is larger than or equal to 60 degrees and smaller than or equal to 120 degrees.

4. A wireless charging system according to claim 2 or 3, wherein the first coil body is annular, a through hole is formed in a middle portion 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, wherein the first coil body includes an outer coil, a middle coil, and an inner coil arranged in this order in a radial direction of the first coil body, the outer coil being located on a side of the middle coil remote from the through hole, the inner coil being located on a side of the middle coil close to the through hole,

the magnetic field intensity of the area where the outer coil is positioned is a first intensity, the magnetic field intensity of the area where the middle coil is positioned is a second intensity, the magnetic field intensity of the area where the inner coil is positioned is a third intensity, the second intensity is larger than or equal to the first intensity, and the second intensity is larger than or equal to the third intensity,

an orthographic projection of the second charging coil on the first surface overlaps an orthographic projection of the middle coil on the first surface.

6. The wireless charging system of claim 5, wherein an orthographic projection of the second charging coil on the first surface overlaps an orthographic projection of the outer ring coil on the first surface, and wherein an orthographic projection of the second charging coil on the first surface overlaps an orthographic projection of the inner ring coil on the first surface.

7. The wireless charging system according to any one of claims 1-6, wherein the first coil body is annular, a through hole is formed in a middle portion of the first coil body, and the first magnetic attraction member is disposed in the first magnetic conductive plate and is located in the through hole.

8. The wireless charging system of claim 7, wherein the first coil body comprises a first inner peripheral surface, a spacing between the first magnetic attraction member and the first inner peripheral surface being greater than or equal to 3mm; or alternatively

The distance between the first magnetic attraction piece and the first inner peripheral surface is more than or equal to 3mm and less than or equal to 5mm.

9. The wireless charging system of claim 7 or 8, wherein an orthographic projection of a center of the first magnetic attraction piece on the first surface covers an orthographic projection of a center of the through hole on the first surface.

10. The wireless charging system of claim 9, wherein an orthographic projection of a center of the first magnetically attractable 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 of any of claims 1-10, wherein the first magnetic attraction member is elongate, and a length direction of the first magnetic attraction member is parallel to the first surface.

12. The wireless charging system of any of claims 1-11, wherein a spacing between the first coil body and the second coil body is less than or equal to 3mm when the first magnetic attraction member magnetically mates with the second magnetic attraction member.

13. The wireless charging system of any of claims 1-12, wherein the first magnetic attraction and the second magnetic attraction are each halbach array magnets.

14. The wireless charging system of any one of claims 1-13, wherein there are two second magnetic attraction pieces, the two second magnetic attraction pieces being disposed on both sides of the second charging coil, respectively.

15. The wireless charging system of any of claims 1-14, wherein the first magnetically permeable plate comprises a second surface opposite the first surface, the first surface having a first recess recessed toward the second surface, at least a portion of the first magnetically attractable member being located within the first recess.

16. The wireless charging system of any of claims 1-15, wherein the first magnetically permeable plate comprises:

a bottom plate portion, the first coil main body being laminated with the bottom plate portion;

A first side plate portion provided to the bottom plate portion and located on an inner peripheral side of the first coil main body; and/or

And a second side plate portion provided on the bottom plate portion and located on the outer peripheral side of the first coil main body.

17. The wireless charging system of any of claims 1-16, further comprising:

the electronic device comprises a third charging coil, wherein the third charging coil comprises a second magnetic conduction plate and a third coil body, the third coil body is arranged on the second magnetic conduction plate in a laminated mode, and the third charging coil is used for being coupled with the first charging coil.

18. The wireless charging system of claim 17, wherein the electronic device comprises a third magnetic attraction for magnetically attracting engagement with the first magnetic attraction, and wherein an orthographic projection of a center of the third coil body on the first surface coincides with an orthographic projection of a center of the first coil body on the first surface when the third magnetic attraction is magnetically attracted engagement with the first magnetic attraction.

19. A wireless charging system, comprising:

The electronic equipment comprises a third charging coil and a third magnetic attraction piece, wherein the third charging coil comprises a second magnetic conduction plate and a third coil main body, the second magnetic conduction plate comprises a third surface, and the third coil main body is arranged on the third surface in a lamination mode;

the electronic handwriting pen comprises a second charging coil and a second magnetic attraction piece, wherein the second charging coil comprises a magnetic core and a second coil main body, the second coil main body is wound on the outer peripheral surface of the magnetic core, the second magnetic attraction piece is used for being magnetically attracted to be matched with the third magnetic attraction piece, and when the second magnetic attraction piece is magnetically attracted to be matched with the third magnetic attraction piece, the orthographic projection of the second charging coil on the third surface is overlapped with the orthographic projection of the third coil main body on the third surface.

20. A wireless charging base, comprising:

the first charging coil comprises a first magnetic conduction plate and a first coil main body, the first magnetic conduction plate comprises a first surface, and the first coil main body is arranged on the first surface;

the first magnetic attraction piece is used for being in magnetic attraction fit with a second magnetic attraction piece on the electronic stylus, and when the first magnetic attraction piece is in magnetic attraction fit with the second magnetic attraction piece, the orthographic projection of a second charging coil of the electronic stylus on the first surface is overlapped with the orthographic projection of the first coil main body on the first surface.

21. The wireless charging dock of claim 20, wherein the first coil body is ring-shaped, a through hole is formed in a middle portion of the first coil body,

the first magnetic attraction piece is arranged on the first magnetic conduction plate and is positioned in the through hole.

22. The wireless charging base of claim 21, wherein the first magnetic attraction member is elongated, and a length direction of the first magnetic attraction member is parallel to the first surface.

23. The wireless charging base of claim 21 or 22, wherein an orthographic projection of a center of the first magnetic attraction element on the first surface coincides with an orthographic projection of a center of the through hole on the first surface.

24. The wireless charging dock of claim 20, wherein the wireless charging dock comprises a housing, the first charging coil is disposed within the housing,

the shell comprises a top plate, the top plate is located on one side, facing the first surface, of the shell, and the first magnetic attraction piece is arranged on the top plate.