CN213876669U

CN213876669U - Stylus pen and electronic device

Info

Publication number: CN213876669U
Application number: CN202120158335.1U
Authority: CN
Inventors: 管飞云; 周耀辉
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-08-03
Anticipated expiration: 2031-01-20

Abstract

The application discloses writing pen and electronic equipment, writing pen includes: the shell is internally provided with an accommodating cavity, and the shell is provided with a through groove communicated with the accommodating cavity; the power supply is arranged in the accommodating cavity; the wireless charging coil is electrically connected with the power supply, the wireless charging coil can be switched between a rolling state and a unfolding state, and the wireless charging coil is accommodated in the accommodating cavity under the condition that the wireless charging coil is in the rolling state; under the condition that the wireless charging coil is in the expansion state, at least a part of the wireless charging coil stretches out of the through groove. This handwriting pen has solved and has just can realize the problem that maximum efficiency charges with casing insertion device, has also solved the handwriting pen simultaneously and can not charge the problem of use simultaneously, has improved user experience.

Description

Stylus pen and electronic device

Technical Field

The application belongs to the technical field of handwriting pens, and particularly relates to a handwriting pen and electronic equipment.

Background

In the related technology, two charging modes of a mobile phone stylus are generally available, one mode is wired charging and the other mode is wireless charging, wherein the wired charging structure is that two contacts are usually reserved on a stylus shell, the stylus is plugged into the mobile phone, and the contacts are contacted with the contacts inside the mobile phone, so that the mobile phone can charge the stylus; the structure of wireless charging is usually that a wireless charging coil and a corresponding wireless charging circuit are integrated inside a stylus pen, and the main charging process is as follows: the handwriting pen is plugged into the mobile phone, and wireless charging is achieved through electromagnetic induction of the NFC coil of the mobile phone and the integrated coil inside the handwriting pen.

In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art:

for the scheme of wired charging, although the charging efficiency is relatively high, during the charging period, the handwriting pen cannot work, that is, the handwriting pen cannot be used while being charged, so that the use experience of the handwriting pen is limited;

for the scheme of wireless charging, current wireless charging mode need fill in the cell-phone with the stylus pen, and charging efficiency can reach the biggest, compares in addition in the scheme of wired charging, because the charging coil of wireless charging scheme receives the restriction of stylus pen size, and the size of charging coil is less, so even if insert the stylus pen into the cell-phone and charge, charging efficiency is also extremely low.

Disclosure of Invention

The present application is directed to a stylus and an electronic device that solve at least one of the problems of the background art.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a stylus pen, including: the shell is internally provided with an accommodating cavity, and the shell is provided with a through groove communicated with the accommodating cavity; the power supply is arranged in the accommodating cavity; the wireless charging coil is electrically connected with the power supply, the wireless charging coil can be switched between a rolling state and a unfolding state, and the wireless charging coil is accommodated in the accommodating cavity under the condition that the wireless charging coil is in the rolling state; under the condition that the wireless charging coil is in the deployed state, at least a portion of the wireless charging coil protrudes out of the through slot.

In a second aspect, an embodiment of the present application provides an electronic device, including: the charging device comprises a device main body, wherein a charging module is arranged in the device main body; according to the handwriting pen of the embodiment, the handwriting pen is detachably connected with the device main body, and the wireless charging coil is charged to the handwriting pen through the charging module when the distance between the wireless charging coil and the charging module is smaller than a set distance.

In the embodiment of the application, through set up the wireless charging coil that can switch over the state in the casing, wireless charging coil can be according to the use needs, stretch out the casing with at least some or be located the casing completely, under the state that the stylus pen need not use, can insert the stylus pen in the equipment that can charge to it, when the stylus pen need charge while using, can expose some or all of wireless charging coil from the casing, make wireless charging coil have bigger charging area, even when the stylus pen does not insert in the equipment, also can charge to wireless charging coil. This handwriting pen has solved and has just can realize the problem that maximum efficiency charges with casing insertion device, has also solved the handwriting pen simultaneously and can not charge the problem of use simultaneously, has improved user experience.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an overall schematic diagram of a stylus pen in a rolled-up state with a wireless charging coil according to an embodiment of the application;

FIG. 2 is a partial schematic view of a stylus pen in a rolled state with a wireless charging coil according to an embodiment of the application

FIG. 3 is an overall schematic diagram of a stylus pen in a deployed state with a wireless charging coil according to an embodiment of the application;

FIG. 4 is a partial schematic view of a stylus pen with a wireless charging coil in an extended state according to an embodiment of the application;

fig. 5 is a top view of the structure shown in fig. 4.

Reference numerals:

a stylus 100;

a housing 10; a through groove 11;

a wireless charging coil 20;

a rotating shaft 30; a first electrode 31; a second electrode 32;

a first electrode 41; a second electrode 42;

a wire 50;

a motor 60.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

A stylus 100 according to an embodiment of the present application is described below with reference to fig. 1-5.

As shown in fig. 1 and 2, a stylus 100 according to some embodiments of the present application includes: a housing 10, a power source (not shown in the figures) and a wireless charging coil 20.

Specifically speaking, be equipped with in the casing 10 and hold the chamber, set up on the casing 10 and hold logical groove 11 of chamber intercommunication, the power is located and is held the intracavity, wireless charging coil 20 is connected with the power electricity, wireless charging coil 20 is used for charging and gives the power with the electric current transmission who produces, wireless charging coil 20 is changeable between rolling state and expansion state, under the condition that wireless charging coil 20 is in rolling state, wireless charging coil 20 is accomodate and is holding the intracavity, under the condition that wireless charging coil 20 is in expansion state, at least one part of wireless charging coil 20 stretches out outside logical groove 11.

In other words, the stylus pen 100 according to the embodiment of the present application is mainly composed of a housing 10, a power supply disposed in the housing 10, and a wireless charging coil 20 capable of charging for the power supply, wherein the housing 10 constitutes a main structure of the stylus pen 100, one end of the housing 10 is provided with a pen point, the power supply can supply power to a circuit of the stylus pen 100, the wireless charging coil 20 is electrically connected to the power supply, and the wireless charging coil 20 can cooperate with an NFC coil of other electronic devices, such as a mobile phone or a tablet computer, to form electromagnetic induction, and transmit the generated current to the power supply.

Wireless charging coil 20 has rolling state and expansion state, and wireless charging coil 20 is when being in the rolling state, as shown in fig. 1 and fig. 2, wireless charging coil 20 can be accomodate in casing 10 completely, and at this moment, can insert stylus pen 100 into other electronic equipment and charge, and wireless charging coil 20 can not produce the interference to other electronic equipment's structure. When wireless charging coil 20 is in the deployed state, as shown in fig. 3 and 4, a part or all of wireless charging coil 20 may protrude from inside through groove 11 of housing 10 and deploy, and deployed wireless charging coil 20 has a larger surface area than the state of being housed inside housing 10, thereby improving the charging efficiency of wireless charging coil 20. On the basis that the charging efficiency of the wireless charging coil 20 is improved, the stylus pen 100 does not need to be inserted into the electronic device for wireless charging, and the function that the stylus pen 100 can be charged in a use state is achieved.

In addition, through designing wireless charging coil 20 into the structure that can stretch out casing 10, the part that stretches out casing 10 can increase wireless charging coil 20's the area of charging to can obviously improve wireless efficiency of charging, and also can increase the distance that stylus 100 and electronic equipment carry out wireless charging, make stylus 100 all can realize wireless charging apart from electronic equipment within a certain limit. When the portable electronic device is used, the stylus pen 100 can be charged only by being located within a certain range near the electronic device. The stylus pen 100 is always charged during use, which can improve the endurance time of the stylus pen 100 without frequent switching between the plug-in charging and the plug-out using operations by a user.

It should be noted that the wireless charging coil 20 may be made of a flexible material, such as FPC, etc., and the structure and principle of charging the wireless charging coil 20 through the NFC coil in other electronic devices are understood and easily implemented by those skilled in the art, and therefore will not be described in detail.

It can be understood that the wireless charging coil 20 can be rolled up in the housing 10 by folding, rolling or pressing, etc. to be in a rolled-up state; when wireless charging coil 20 switches from the rolling state to the state of expansion, can make it pull out from leading to the inslot 11 through holding wireless charging coil 20 one end, also can be through inside setting up drive structure, release wireless charging coil 20 from leading to the inslot 11.

Therefore, according to the stylus pen 100 of the embodiment of the application, by arranging the wireless charging coil 20 capable of switching states in the housing 10, the wireless charging coil 20 can extend at least a part of the wireless charging coil out of the housing 10 or be completely located in the housing 10 according to usage requirements, when the stylus pen is in a state not required to be used, the stylus pen can be inserted into a device capable of charging the stylus pen, when the stylus pen needs to be charged and used, a part or all of the wireless charging coil 20 can be exposed out of the housing 10, the wireless charging coil 20 has a larger charging area, even when the stylus pen is not inserted into the device, the wireless charging coil 20 can be charged, charging efficiency is guaranteed, and the distance between the stylus pen and the device is lengthened. The handwriting pen solves the problem that the casing 10 needs to be inserted into the device to realize maximum-efficiency charging, and meanwhile, the problem that the handwriting pen cannot be charged and used at the same time is solved, and user experience is improved.

According to an embodiment of the present application, the housing 10 is a cylindrical structure, and the stylus pen 100 further includes: pivot 30, pivot 30 are located and are held the chamber, and along the axial extension that holds the chamber, and wireless charging coil 20's one end is fixed in pivot 30, and the other end is mobile, and under wireless charging coil 20 was in the condition of rolling state, wireless charging coil 20 convoluteed on pivot 30.

In other words, the housing 10 may have a conventional pen-shaped structure, and the stylus pen 100 further includes a rotating shaft 30, as shown in fig. 2 and 4, the rotating shaft 30 may have a cylindrical structure coaxially disposed with the housing 10, and the wireless charging coil 20 is disposed on the rotating shaft 30. Rotating shaft 30 is rotatable around its own axis, and rotating shaft 30 can drive wireless charging coil 20 to wind on rotating shaft 30 or unwind from rotating shaft 30 during the rotation process.

Specifically, when wireless charging coil 20 is in a rolled state, wireless charging coil 20 may be completely located within housing 10 and completely wound on spindle 30. When wireless charging coil 20 needs to be switched to the unfolding state from the rolling state, can anticlockwise rotate pivot 30, wireless charging coil 20 unfolds in proper order to one end can be followed logical groove 11 and stretched out, and pivot 30 can continuously rotate, stretches out casing 10 completely until wireless charging coil 20. When wireless charging coil 20 needs to be switched from the unfolding state to the folding state, rotating shaft 30 can be rotated clockwise, and wireless charging coil 20 is wound on rotating shaft 30 in sequence until wireless charging coil 20 is completely accommodated in housing 10.

From this, through set up pivot 30 holding the intracavity, wireless charging coil 20 can be convoluteed on pivot 30, through anticlockwise or clockwise rotation pivot 30, can realize wireless charging coil 20's state switching, this simple structure is feasible to convenient operation.

Optionally, in some embodiments of the present application, the outer surface of the rotating shaft 30 is provided with a first electrode 31 and a second electrode 32, the positive electrode of the wireless charging coil 20 is electrically connected to the first electrode 31, and the negative electrode of the wireless charging coil 20 is electrically connected to the second electrode 32.

Stylus 100 further includes: the first electrode 41 and the second electrode 42 are respectively arranged on the shell 10, a first end of the first electrode 41 is electrically connected with the first electrode 31, a second end of the first electrode 41 is electrically connected with a power supply, a first end of the second electrode 42 is electrically connected with the second electrode 32, and a second end of the second electrode 42 is electrically connected with the power supply.

As shown in fig. 4 and 5, the wireless charging coil 20 is disposed on the rotating shaft 30 and electrically connected to the first electrode 31 and the second electrode 32 on the rotating shaft 30, the housing 10 is provided with the first electrode 41 and the second electrode 42, the first electrode 41 is electrically connected to the first electrode 31, the second electrode 42 is electrically connected to the second electrode 32, and the current generated by the cooperation of the wireless charging coil 20 and the NFC coil is transmitted to the power supply through the electrical connection between the first electrode 41 and the first electrode 31 and the electrical connection between the second electrode 42 and the second electrode 32. Thereby, an electrical connection between the wireless charging coil 20 and the power source may be achieved.

According to some embodiments of the present application, the wireless charging coil 20 and the first electrode 31 and the second electrode 32 are electrically connected through a wire 50, respectively, and the wire 50 is disposed on the outer surface of the rotation shaft 30.

Specifically, as shown in fig. 4 and 5, a conductive wire 50 may be disposed on the outer surface of the rotation shaft 30 and extend along the length direction of the rotation shaft 30, and an electrode of the wireless charging coil 20 may be welded on the conductive wire 30 to electrically connect the first electrode 31 and the second electrode 32. Thus, the assembly of the wireless charging coil 20 and the rotation shaft 30 can be achieved through a simple connection, and the electrical connection structure with the power supply is simplified.

Alternatively, in other embodiments of the present application, the first electrode 31 and the second electrode 32 are spaced apart along the circumferential direction of the rotating shaft 30, and both the first electrode 41 and the second electrode 42 are brushes.

As shown in fig. 4 and 5, the positions of the first electrode 31 and the second electrode 32 on the rotating shaft 30 are staggered in both the axial direction and the circumferential direction of the rotating shaft 30, as shown in fig. 3, the first electrode 41 and the second electrode 42 may be respectively strip-shaped sheet bodies, one ends of the first electrode 41 and the second electrode 42 are fixed on the inner wall surface of the housing 10, the other ends of the first electrode 41 and the second electrode 42 respectively correspond to the positions of the first electrode 31 and the second electrode 32, and the first electrode 41 and the second electrode 42 may be electrically connected to the first electrode 31 and the second electrode 32 in the form of brushes.

Therefore, according to the structure, when the rotating shaft 30 rotates to any position and stops, the first electrode 41 and the second electrode 42 can be electrically connected with the corresponding first electrode 31 and second electrode 32, so that the current generated by charging the wireless charging coil 20 can be transmitted to the power supply.

According to some embodiments of the present application, stylus 100 further comprises: motor 60, motor 60 locate and hold the chamber, and pivot 30 is the motor shaft of motor 60, and the first end and the motor 60 of pivot 30 are connected, and the second end of pivot 30 is located to wireless charging coil 20.

That is, as shown in fig. 2 and 4, a motor 60 coaxial with the housing 10 is further disposed in the housing 10, and a motor shaft of the motor 60 is the rotating shaft 30. Therefore, the motor 60 drives the rotating shaft 30 to rotate forward or reversely, so that the winding or the unwinding of the wireless charging coil 20 on the rotating shaft 30 can be realized, the charging process of the stylus pen 100 is more automatic, and the user experience is improved.

In some optional embodiments of the present application, stylus 100 further comprises: the electric quantity detection module (not shown in the figure) is used for detecting the electric quantity of the power supply, and the electric quantity detection module is connected with the motor 60 and adjusts the motor shaft according to the electric quantity of the power supply so as to adjust the length of the wireless charging coil 20 extending out of the through groove 11.

Specifically, the electric quantity detection module can be arranged in the shell 10, and the electric quantity detection module can be an electric quantity detection circuit and can be used for detecting the electric quantity of the power supply. Stylus pen 100 is in the normal use in-process, and wireless charging coil 20 is in the rolling state usually, need not to charge stylus pen 100 constantly, and when the electric quantity of power was less than a certain threshold value of setting for, circuit detection module can give motor 60 with electric quantity signal transmission, and motor 60 can drive pivot 30 and rotate, makes wireless charging coil 20 stretch out and charges stylus pen 100. When the electric quantity of power reached another threshold value of setting for, circuit detection module alright give motor 60 with electric quantity signal transmission, and motor 60 drive pivot 30 rotates, makes wireless charging coil 20 resume to the rolling state, accomplishes to charge.

From this, this structure can be according to how much of power electric quantity, and automatic control motor 60 moves to realize the switching of wireless charging coil 20's state, finally reach the effect that can charge to handwriting pen 100 is automatic in the use, further improved user's use and experienced.

According to one embodiment of the application, wireless charging coil 20 is a rectangular sheet structure, and wireless charging coil 20 is connected with pivot 30 at the ascending first end of length direction, leads to the width of groove 11 and is not less than the thickness of wireless charging coil 20, leads to the length of groove 11 and is not less than the width of wireless charging coil 20.

As shown in fig. 4 and 5, wireless charging coil 20 is a rectangular coil, one wide side of wireless charging coil 20 is connected to rotating shaft 30, the other wide side of wireless charging coil 20 can pass through groove 11 to enter or extend out of housing 10, the size of through groove 11 corresponds to the width and thickness of wireless charging coil 20, and it is ensured that the other wide side of wireless charging coil 20 can freely move in through groove 11. The wireless charging coil 20 of rectangle structure can be so that wireless charging coil 20 has bigger charging area after stretching out casing 10, can effectively improve wireless charging coil 20's charge efficiency.

An electronic device according to an embodiment of the present application includes: the device comprises a device main body and the stylus pen 100, wherein the device main body can be a mobile phone, a tablet personal computer and other devices, a charging module is arranged in the device main body, a jack corresponding to the structure of the stylus pen 100 can be further arranged on the device main body, and the stylus pen 100 can be inserted into the jack and charged by the charging module. Stylus pen 100 is detachably connected to the device main body, and wireless charging coil 20 is charged to stylus pen 100 by the charging module when the distance from the charging module is less than the set distance.

In other words, the device body may determine whether the wireless charging coil 20 in the stylus pen 100 needs to be charged by determining a distance between the stylus pen 100 and the device body, and when the distance between the stylus pen 100 and the device body is smaller than a set distance, the charging module in the device body may enter a charging mode to generate electromagnetic induction with the wireless charging coil 20 in the stylus pen 100, so as to charge the wireless charging coil 20. When the distance between the stylus pen 100 and the device body is greater than the set distance, the charging module in the device body may exit the charging mode.

Therefore, by determining the distance between the stylus pen 100 and the device body, it can be determined whether the charging module in the device body needs to be opened to charge the wireless charging coil 20, and the use experience of the electronic device can be effectively improved.

According to an embodiment of the application, the electronic device further comprises: the handwriting pen is located to bluetooth low energy consumption module (BLE module, not shown in the figure), and the module of charging is according to the signal intensity that bluetooth low energy consumption module sent, confirms whether the distance between wireless charging coil 20 and the module of charging is less than the settlement distance.

Specifically, a BLE module is provided in the stylus pen 100, and through the BLE module, the stylus pen 100 may communicate with the device main body, and the device main body may determine a distance between the stylus pen 100 and the device main body by detecting a BLE signal intensity emitted by the stylus pen 100. When the distance is within the set threshold range, the device body can open the wireless charging function.

Motor 60 in stylus pen 100 may control wireless charging coil 20 to extend in a fixed step, and during the process of extending wireless charging coil 20, the charging current detection circuit inside stylus pen 100 may detect the magnitude of the charging current until wireless charging coil 20 is completely extended from housing 10. After wireless charging coil 20 is fully extended out of housing 10, charging current detection circuitry may determine a correspondence between the magnitude of the charging current and the length of wireless charging coil 20 extended out of housing 10. After determining the point where the charging current is maximum, the motor 60 in the stylus pen 100 wirelessly charges the corresponding adjusted length of the wireless charging coil 20.

When the device body detects that the BLE signal intensity of the stylus pen 100 is lower than a specified threshold, or after the user manually retracts the wireless charging coil 20, the device body can close the wireless charging function.

Thus, according to the electronic device of the embodiment of the present application, by adopting the stylus pen 100 of the above-described embodiment, since the stylus pen 100 according to the above-described embodiment has the above-described technical effects, the electronic device according to the present application also has the corresponding technical effects that the wireless charging efficiency of the stylus pen 100 is improved, and the stylus pen 100 can be wirelessly charged with high efficiency even when being used or when the stylus pen 100 is placed near the device body; the problem that the handwriting pen 100 can be charged with maximum efficiency only by being plugged into the device body is solved; meanwhile, the problem that the handwriting pen 100 cannot be used while being charged due to low charging efficiency is solved.

Other configurations of the electronic apparatus according to the embodiment of the present application, such as a camera module, etc., and operations thereof, are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A stylus, comprising:

the shell is internally provided with an accommodating cavity, and the shell is provided with a through groove communicated with the accommodating cavity;

the power supply is arranged in the accommodating cavity;

a wireless charging coil electrically connected with the power supply, the wireless charging coil being switchable between a rolled state and a deployed state,

under the condition that the wireless charging coil is in the rolling state, the wireless charging coil is accommodated in the accommodating cavity;

under the condition that the wireless charging coil is in the deployed state, at least a portion of the wireless charging coil protrudes out of the through slot.

2. The stylus of claim 1, wherein the housing is a cylindrical structure, the stylus further comprising:

the pivot, the pivot is located hold the chamber, and follow the axial extension that holds the chamber, wireless charging coil one end is fixed in the pivot, and the other end is mobile wireless charging coil is in under the condition of rolling state, wireless charging coil convolutes in the pivot.

3. The stylus pen according to claim 2, wherein a first electrode and a second electrode are arranged on the outer surface of the rotating shaft, a positive electrode of the wireless charging coil is electrically connected with the first electrode, and a negative electrode of the wireless charging coil is electrically connected with the second electrode;

the stylus pen further includes: the first electrode and the second electrode are respectively arranged on the shell, the first end of the first electrode is electrically connected with the first electrode, the second end of the first electrode is electrically connected with the power supply, the first end of the second electrode is electrically connected with the second electrode, and the second end of the second electrode is electrically connected with the power supply.

4. The stylus pen of claim 3, wherein the wireless charging coil is electrically connected to the first electrode and the second electrode through wires, and the wires are disposed on an outer surface of the rotating shaft.

5. The stylus of claim 3, wherein the first and second electrodes are spaced apart along a circumference of the shaft, the first and second electrodes each being a brush.

6. The stylus of claim 2, further comprising:

the motor, the motor is located hold the chamber, the first end of pivot with the motor is connected, wireless charging coil is located the second end of pivot.

7. The stylus of claim 6, further comprising:

the electric quantity detection module is used for detecting the electric quantity of the power supply, the electric quantity detection module is connected with the motor and adjusts the motor shaft according to the electric quantity of the power supply so as to adjust the length of the wireless charging coil extending out of the through groove.

8. The stylus pen according to claim 2, wherein the wireless charging coil is a rectangular sheet structure in the deployed state, a first end of the wireless charging coil in a length direction is connected with the rotating shaft, a width of the through groove is not less than a thickness of the wireless charging coil, and a length of the through groove is not less than the width of the wireless charging coil.

9. An electronic device, comprising:

the charging device comprises a device main body, wherein a charging module is arranged in the device main body;

the stylus pen according to any one of claims 1-8, detachably connected to the device body, the wireless charging coil being charged to the stylus pen by the charging module when a distance from the charging module is less than a set distance.

10. The electronic device of claim 9, further comprising:

the Bluetooth low energy consumption module is arranged on the handwriting pen, and the charging module determines whether the distance between the wireless charging coil and the charging module is smaller than the set distance according to the signal intensity sent by the Bluetooth low energy consumption module.