Wireless keyboard

1. A wireless keyboard, comprising:

a keyboard body, a holder for placing a tablet computer, and a connection portion for movably connecting the keyboard body and the holder, wherein

the connection portion comprises an accommodating cavity with an opening at an end, the accommodating cavity is used for accommodating an electronic stylus through the opening, and a wireless charging coil is arranged in the accommodating cavity; a charging interface and a wireless charging control module are arranged in the keyboard body, the wireless charging control module is connected to the charging interface, and the wireless charging control module is connected to the wireless charging coil;

the charging interface is configured to receive a direct current signal;

the wireless charging control module is configured to convert, if it is detected that a direct current signal is inputted to the charging interface, the direct current signal into an alternating current signal and transmit the alternating current signal to the wireless charging coil; and

the wireless charging coil is configured to generate an alternating electromagnetic field in response to the alternating current signal, to wirelessly charge a battery of the electronic stylus accommodated in the accommodating cavity, wherein the alternating electromagnetic field is configured to cause a wireless charging coil of the electronic stylus to generate an alternating current signal and transmit the alternating current signal to a wireless charging control module of the electronic stylus, the wireless charging control module of the electronic stylus is configured to convert the alternating current signal from the wireless charging coil of the electronic stylus to a direct current signal utilized by a charging control module of the electronic stylus to change the battery of the electronic stylus.

2. The wireless keyboard according to claim 1 , wherein the connection portion comprises a rotating shaft, and the rotating shaft is configured to movably connect the keyboard body and the holder, wherein

the rotating shaft is hollow inside, and an opening is provided at an end of the rotating shaft, to form the accommodating cavity.

3. The wireless keyboard according to claim 1 , wherein the connection portion comprises a flexible connector and an accommodating component, wherein

the flexible connector is configured to bend to movably connect the keyboard body and the holder; and

the accommodating component is fixed in a bent region of the flexible connector, the accommodating component is hollow inside, and an opening is provided at an end of the accommodating component, to form the accommodating cavity.

4. The wireless keyboard according to claim 1 , wherein a voltage stabilizing module is further arranged in the keyboard body, wherein

that the wireless charging control module is connected to the charging interface comprises: the wireless charging control module is connected to the charging interface through the voltage stabilizing module; and

the voltage stabilizing module is configured to convert a direct current signal from the charging interface into a working voltage of the wireless charging control module.

5. The wireless keyboard according to claim 1 , wherein an elastic pressing component is further arranged in the accommodating cavity, wherein when the electronic stylus is accommodated in the accommodating cavity, the elastic pressing component is in contact with a first end of the electronic stylus; and

the elastic pressing component is configured to eject, in response to a press operation of a user on a second end of the electronic stylus accommodated in the accommodating cavity, the electronic stylus out of the accommodating cavity from the second end toward the first end, wherein

the first end is an end located at the opening when the electronic stylus is accommodated in the accommodating cavity, and the second end is opposite to the first end.

6. The wireless keyboard according to claim 1 , wherein the charging interface comprises any one of a Type-C interface, a Micro B interface, or a POGO pin interface.

7. The wireless keyboard according to claim 1 , wherein the keyboard body further comprises a charging control module and a battery, wherein the charging control module is connected to the battery, and the charging control module is connected to the charging interface; and

the charging control module is configured to receive the direct current signal inputted from the charging interface, and use the direct current signal to charge the battery.

8. The wireless keyboard according to claim 1 , wherein the wireless charging control module is integrated in a wireless charging control chip.

9. A wireless charging system, comprising: an electronic stylus, and a wireless keyboard,

wherein the wireless keyboard comprises: a keyboard body, a holder for placing a tablet computer, and a connection portion for movably connecting the keyboard body and the holder, wherein

the connection portion comprises an accommodating cavity with an opening at an end, the accommodating cavity is used for accommodating the electronic stylus through the opening, and a wireless charging coil is arranged in the accommodating cavity; a charging interface and a wireless charging control module are arranged in the keyboard body, the wireless charging control module is connected to the charging interface, and the wireless charging control module is connected to the wireless charging coil;

the charging interface is configured to receive a direct current signal;

the wireless charging control module is configured to convert, if it is detected that a direct current signal is inputted to the charging interface, the direct current signal into an alternating current signal and transmit the alternating current signal to the wireless charging coil; and

the wireless charging coil is configured to generate an alternating electromagnetic field in response to the alternating current signal, to wirelessly charge the electronic stylus accommodated in the accommodating cavity;

wherein

the electronic stylus comprises a wireless charging coil, a wireless charging control module, a charging control module, and a battery;

the wireless charging coil is configured to generate, after the electronic stylus is accommodated in the wireless keyboard, an alternating current signal by inducing an alternating electromagnetic field provided by the wireless keyboard, and transmit the alternating current signal to the wireless charging control module;

the wireless charging control module is configured to convert the alternating current signal into a direct current signal, and transmit the direct current signal to the charging control module; and

the charging control module is configured to use the direct current signal to charge the battery.

10. The wireless charging system according to claim 9 , wherein the connection portion comprises a rotating shaft, and the rotating shaft is configured to movably connect the keyboard body and the holder, wherein

the rotating shaft is hollow inside, and an opening is provided at an end of the rotating shaft, to form the accommodating cavity.

11. The wireless charging system according to claim 9 , wherein the connection portion comprises a flexible connector and an accommodating component, wherein

the flexible connector is configured to bend to movably connect the keyboard body and the holder; and

the accommodating component is fixed in a bent region of the flexible connector, the accommodating component is hollow inside, and an opening is provided at an end of the accommodating component, to form the accommodating cavity.

12. The wireless charging system according to claim 9 , wherein a voltage stabilizing module is further arranged in the keyboard body, wherein

that the wireless charging control module is connected to the charging interface comprises: the wireless charging control module is connected to the charging interface through the voltage stabilizing module; and

the voltage stabilizing module is configured to convert a direct current signal from the charging interface into a working voltage of the wireless charging control module.

13. The wireless charging system according to claim 9 , wherein an elastic pressing component is further arranged in the accommodating cavity, wherein when the electronic stylus is accommodated in the accommodating cavity, the elastic pressing component is in contact with a first end of the electronic stylus; and

the elastic pressing component is configured to eject, in response to a press operation of a user on a second end of the electronic stylus accommodated in the accommodating cavity, the electronic stylus out of the accommodating cavity from the second end toward the first end, wherein

the first end is an end located at the opening when the electronic stylus is accommodated in the accommodating cavity, and the second end is opposite to the first end.

14. The wireless charging system according to claim 9 , wherein the charging interface comprises any one of a Type-C interface, a Micro B interface, or a POGO pin interface.

15. The wireless charging system according to claim 9 , wherein the keyboard body further comprises a charging control module and a battery, wherein the charging control module is connected to the battery, and the charging control module is connected to the charging interface; and

the charging control module is configured to receive the direct current signal inputted from the charging interface, and use the direct current signal to charge the battery.

16. The wireless charging system according to claim 9 , wherein the wireless charging control module is integrated in a wireless charging control chip.

17. A method comprising:

receiving a tablet computer in a holder of a wireless keyboard, the wireless keyboard including the holder, a keyboard body, and a connection portion for movably connecting the keyboard body and the holder;

receiving an electronic stylus within an accommodating cavity of the connection portion of the wireless keyboard, wherein a wireless charging coil is arranged in the accommodating cavity, a charging interface and a wireless charging control module are arranged in the keyboard body, the wireless charging control module is connected to the charging interface, and the wireless charging control module is connected to the wireless charging coil;

detecting, at the wireless charging control module of the wireless keyboard, that a first direct current signal is inputted to the charging interface of the wireless keyboard;

converting, by the wireless charging control module of the wireless keyboard, the first direct current signal into a first alternating current signal in response to detection that the first direct current signal is inputted to the charging interface; and

transmitting the first alternating current signal to the wireless charging coil of the wireless keyboard;

generating, by the wireless charging coil of the wireless keyboard, an alternating electromagnetic field in response to the first alternating current signal;

generating, by a wireless charging coil of the electronic stylus and with the electronic stylus accommodated in the wireless keyboard, a second alternating current signal by inducing the alternating electromagnetic field provided by the wireless keyboard;

transmitting, by the wireless charging coil of the electronic stylus, the second alternating current signal to a wireless charging control module of the electronic stylus;

converting, by the wireless charging control module of the electronic stylus, the second alternating current signal into a second direct current signal; and

utilizing, by a charging control module of the electronic stylus, the second direct current signal to charge a battery of the electronic stylus.

18. The method according to claim 17 , wherein the charging interface comprises any one of a Type-C interface, a Micro B interface, or a POGO pin interface.

19. The method according to claim 17 , wherein the keyboard body further comprises a charging control module and a battery, the charging control module is connected to the battery, the charging control module is connected to the charging interface, and the method further comprises:

receiving the first direct current signal inputted from the charging interface; and

charging the battery of the wireless keyboard using the first direct current signal.

20. The method according to claim 17 , wherein the wireless charging control module is integrated in a wireless charging control chip.