Charging system, earphone box and earphone

Abstract

The application discloses a charging system, an earphone box and earphones, which comprise a first charging circuit and a second charging circuit, the first charging circuit is arranged in the earphone box, and the second charging circuit is arranged in the earphones; the earphone box comprises a first signal end, a power supply and a first processor, and the earphones comprise a second signal end, a battery and a second processor; the first charging circuit comprises a first contact, a second contact and a first switch, the first contact is connected with the power supply, the second contact is connected with the first signal end, a first end of the first switch is connected with the first contact, a second end of the first switch is connected with the second contact, and a control end of the first switch is connected with the first processor; the second charging circuit comprises a third contact, a fourth contact and a second switch, the third contact is connected with the battery, the fourth contact is connected with the second signal end, a first end of the second switch is connected with the third contact, a second end of the second switch is connected with the fourth contact, and a control end of the second switch is connected with the second processor.

Description

Technical Field

[0001] This invention relates to the field of electronics, and more specifically, to a charging system, an earphone case, and earphones. Background Technology

[0002] Bluetooth earphones, such as TWS earphones, are convenient to carry and offer a good user experience, making them increasingly popular. Currently, most earphone cases use magnetic springs and contact points to charge TWS earphones. However, this method has a drawback: the contact springs of the earphone case are deeply recessed in the grooves, making them difficult to clean. They are also prone to liquid accumulation and corrosion, obstruction by foreign objects, or falling off, which can easily cause connection abnormalities and thus charging abnormalities. Summary of the Invention

[0003] This application provides a charging system, an earphone case, and earphones to solve the problem in the prior art where the charging case cannot charge the earphones properly when the connection between the charging case and the earphones is abnormal.

[0004] In a first aspect, embodiments of this application provide a charging system, including a first charging circuit and a second charging circuit, wherein the first charging circuit is disposed in an earphone case and the second charging circuit is disposed in the earphone;

[0005] The earphone case further includes a first signal terminal, a power supply and a first processor, and the earphones further include a second signal terminal, a battery and a second processor;

[0006] The first charging circuit includes a first contact, a second contact, and a first switch assembly. The first contact is electrically connected to the power supply, the second contact is electrically connected to the first signal terminal, the first terminal of the first switch assembly is electrically connected to the first contact, the second terminal of the first switch assembly is electrically connected to the second contact, and the control terminal of the first switch assembly is electrically connected to the first processor.

[0007] The second charging circuit includes a third contact, a fourth contact, and a second switch assembly. The third contact is electrically connected to the battery, the fourth contact is electrically connected to the second signal terminal, the first terminal of the second switch assembly is electrically connected to the third contact, the second terminal of the second switch assembly is electrically connected to the fourth contact, and the control terminal of the second switch assembly is electrically connected to the second processor.

[0008] When the first switch assembly and the second switch assembly are turned on, the power supply, the second contact, the fourth contact and the battery constitute a first charging path so that the earphone case can charge the earphones;

[0009] When the first switch assembly and the second switch assembly are disconnected, the power supply, the first contact, the third contact, and the battery constitute a second charging path to enable the earphone case to charge the earphones.

[0010] Secondly, embodiments of this application provide an earphone case, which is provided with a first charging circuit, a first signal terminal, a power supply and a first processor;

[0011] The first charging circuit includes a first contact, a second contact, and a first switch assembly. The first contact is electrically connected to the power supply, the second contact is electrically connected to the first signal terminal, the first end of the first switch assembly is electrically connected to the first contact, the second end of the first switch assembly is electrically connected to the second contact, and the control terminal of the first switch assembly is electrically connected to the first processor.

[0012] Thirdly, embodiments of this application provide an earphone, which is provided with a second charging circuit, a second signal terminal, a battery, and a second processor;

[0013] The second charging circuit includes a third contact, a fourth contact, and a second switch assembly. The third contact is electrically connected to the battery, the fourth contact is electrically connected to the second signal terminal, the first terminal of the second switch assembly is electrically connected to the third contact, the second terminal of the second switch assembly is electrically connected to the fourth contact, and the control terminal of the second switch assembly is electrically connected to the second processor.

[0014] In this embodiment, a charging system is provided. When the first and second switching components are on, the power supply, the second contact, the fourth contact, and the battery constitute a first charging path to charge the earphones. When the first and second switching components are off, the power supply, the first contact, the third contact, and the battery constitute a second charging path to charge the earphones. It is understood that the second charging path is the charging path when the earphones are normally charging. When the first charging path is abnormal, the charging system switches to the second charging path to allow the earphones to continue charging, thus ensuring that the charging process continues. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0016] Figure 1 This is a schematic diagram of the charging system provided in an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the structure of a charging system provided in another embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the structure of a charging system provided in another embodiment of this application;

[0019] Figure 4 The working process of an example charging system is shown;

[0020] Figure 5 This illustrates the working process of an example charging system. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0022] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0023] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] This application provides a charging system, such as... Figure 1 As shown, the charging system 1 includes a first charging circuit and a second charging circuit. The first charging circuit is disposed in the earphone case 10, and the second charging circuit is disposed in the earphone 20. The earphone case 10 also includes a first signal terminal 130, a power supply 120, and a first processor 110. The earphone 20 also includes a second signal terminal 230, a battery 220, and a second processor 210.

[0025] The first charging circuit includes a first contact 150, a second contact 160, and a first switch assembly 140. The first contact 150 is electrically connected to the power supply 120, the second contact 160 is electrically connected to the first signal terminal 130, the first end of the first switch assembly 140 is electrically connected to the first contact 150, the second end of the first switch assembly 140 is electrically connected to the second contact 160, and the control terminal of the first switch assembly 150 is electrically connected to the first processor 130.

[0026] The second charging circuit includes a third contact 250, a fourth contact 260, and a second switch assembly 240. The third contact 250 is electrically connected to the battery 220, the fourth contact 260 is electrically connected to the second signal terminal 230, the first terminal of the second switch assembly 240 is electrically connected to the third contact 250, the second terminal of the second switch assembly 240 is electrically connected to the fourth contact 260, and the control terminal of the second switch assembly 240 is electrically connected to the second processor 210.

[0027] The earphone 20 can be a TWS earphone, and the earphone case 10 can be a TWS earphone case corresponding to the TWS earphone, which can charge the TWS earphone.

[0028] Reference Figure 2 The charging power supply 120 can be Vcharge+. The earphone case 10 also includes a battery (not shown in the figure). One end of the power supply 120 is connected to the first contact 150, and the other end of the power supply 120 is connected to the positive terminal of the battery. The first signal terminal 130 can be a first signal PIN. The earphone case 10 can communicate with the earphone 20 through the first signal terminal 130. The first signal terminal 130 is also connected to the first processor 110 (not shown in the figure; for example, the first signal terminal can be connected to one of the GPIO ports of the first processor). The earphone case 10 also includes a first ground PIN and a first ground contact. One end of the first ground PIN is connected to the negative terminal of the battery of the earphone case 10 (not shown in the figure), and the other end of the first ground PIN is connected to the first ground contact. Among them, the first contact 150, the second contact 160, and the first ground contact are contact springs at the connection between the earphone case 10 and the earphone 20. The first contact 150 is a power contact, and the second contact 160 is a signal contact.

[0029] Reference Figure 1 The first switching component 140 can be an NMOS transistor. The drain of the NMOS transistor is connected to the first contact 150, the gate of the NMOS transistor is connected to the first processor 110, and the source of the NMOS transistor is connected to the second contact 160. The first switching component 140 is in the off state by default.

[0030] Reference Figure 2The battery 220 can be VBAT. The second signal terminal 230 can be a second signal PIN, through which the earphone 20 can communicate with the earphone case 10. The second signal terminal 230 is also connected to the second processor 210 (not shown in the figure; for example, the second signal terminal can be connected to one of the GPIO ports of the second processor). The earphone 10 also includes a second ground PIN and a second ground contact, with the other end of the first ground PIN connected to the first ground contact. The third contact 250, the fourth contact 260, and the second ground contact are the contacts at the connection point between the earphone case 10 and the earphone 20. Furthermore, the third contact 150 is a power contact, and the fourth contact 260 is a signal contact.

[0031] Reference Figure 2 The second switching component 240 can be an NMOS transistor, with the drain of the NMOS transistor connected to the third contact 250, the gate of the NMOS transistor connected to the second processor 210, and the source of the NMOS transistor connected to the fourth contact 260.

[0032] When the first switch assembly 140 and the second switch assembly 240 are on, the power supply 120, the second contact 160, the fourth contact 260, and the battery 220 form a first charging path to charge the earphones 20 via the earphone case 10. When the first switch assembly 140 and the second switch assembly 240 are off, the power supply 120, the first contact 150, the third contact 250, and the battery 220 form a second charging path to charge the earphones 20 via the earphone case 10.

[0033] The following will explain these two situations in detail, such as... Figure 1 As shown, when the earphone 20 is inserted into the earphone case 10, the first switch assembly 140 and the second switch assembly 240 are typically in the off state. Here, the power supply 120, the first contact 150, the third contact 250, and the battery 220 constitute the second charging path. Simultaneously, the first signal terminal 130, the second contact 160, the fourth contact 260, and the second signal terminal 230 constitute the second communication path. The earphone case 10 and the earphone 20 can establish a communication handshake through the second communication path. After a successful communication handshake, the earphone case 10 can supply power to the earphone 20 through the second charging path.

[0034] In the event of an abnormality in the second charging path, the first processor 110 controls the first switch assembly 140 to be in a conducting state, and the second processor 210 controls the second switch 240 to be in a conducting state. Here, the power supply 120, the second contact 160, the fourth contact 260, and the battery 220 constitute the first charging path, enabling the earphone case 10 to charge the earphones 20. Since the second contact 160 and the fourth contact 260 are both communication signal contacts, in the event of an abnormal charging path, the earphones' communication path will be utilized to ensure that charging continues.

[0035] In this embodiment, a charging system is provided. When the first and second switching components are on, the power supply, the second contact, the fourth contact, and the battery constitute a first charging path to charge the earphones. When the first and second switching components are off, the power supply, the first contact, the third contact, and the battery constitute a second charging path to charge the earphones. It is understood that the second charging path is the charging path when the earphones are normally charging. When the first charging path is abnormal, the charging system switches to the second charging path to allow the earphones to continue charging, thus ensuring that the charging process continues.

[0036] In one embodiment, to prevent high voltage from damaging the first signal terminal 130 and the second signal terminal 230 during charging via the first charging path, refer to... Figure 2 The first charging path further includes a third switch assembly 170. A first end of the third switch assembly 170 is connected to the second contact 160, a second end of the third switch assembly 170 is connected to the first signal terminal 130, and a control terminal of the third switch assembly 170 is connected to the first processor 110. The third switch assembly 170 is in a conductive state by default.

[0037] The second charging path also includes a fourth switch assembly 270, the first end of which is connected to the fourth contact 260, the second end of which is connected to the second signal terminal 230, and the control terminal of which is connected to the second processor 210.

[0038] The third switching component is an NMOS transistor, the drain of which is connected to the first signal terminal, the gate of which is connected to the first processor, and the source of which is connected to the first contact.

[0039] The fourth switching component is an NMOS transistor. The drain of the NMOS transistor is connected to the fourth contact, the gate of the NMOS transistor is connected to the second processor, and the source of the NMOS transistor is connected to the second signal terminal.

[0040] When the first switch assembly 140 and the second switch assembly 240 are turned on and the third switch assembly 170 and the fourth switch assembly 270 are turned off, the power supply 120, the second contact 160, the fourth contact 260 and the battery 220 form a first charging path so that the earphone case 10 charges the earphone 20.

[0041] The following is a specific scenario, such as Figure 2 As shown, when the earphone 20 is inserted into the earphone case 10, the first switch assembly 140 and the second switch assembly 240 are typically in the off state, while the third switch assembly 170 and the fourth switch assembly 270 are typically in the on state. Here, the power supply 120, the first contact 150, the third contact 250, and the battery 220 form the second charging path. Simultaneously, the first signal terminal 130, the second contact 160, the fourth contact 260, and the second signal terminal 230 form the second communication path. The earphone case 10 and the earphone 20 can establish a communication handshake through the second communication path. After a successful communication handshake, the earphone case 10 can supply power to the earphone 20 through the second charging path.

[0042] In the event of an abnormality in the second charging path, the first processor 110 controls the first switch assembly 140 to be in the ON state and the third switch assembly 170 to be in the OFF state. The second processor 210 controls the second switch assembly 240 to be in the ON state and the fourth switch assembly 270 to be in the OFF state. Here, the power supply 120, the second contact 160, the fourth contact 260, and the battery 220 constitute the first charging path to charge the earphone case 10 to the earphone 20. That is, since both the second contact 160 and the fourth contact 260 are communication signal contacts, in the event of an abnormal charging path, the earphone's communication path is utilized to ensure that charging continues. Simultaneously, when the earphone case charges the earphones based on the second charging path, controlling the second switch assembly 170 and the third switch assembly 270 to be in the OFF state ensures that the high voltage at the earphone case 10 charging the earphones 20 does not damage the first signal terminal 130 and the second signal terminal 230.

[0043] In one embodiment, when the first switch assembly 140 and the second switch assembly 240 are turned on, the first signal terminal 130, the first contact 150, the third contact 250 and the second signal terminal 230 constitute a first communication path to enable the earphone case 10 and the earphone 20 to communicate.

[0044] When the first switch assembly 140 and the second switch assembly 240 are disconnected, the first signal terminal 130, the second contact 160, the fourth contact 260 and the second signal terminal 230 form a second communication path to enable the earphone box 10 and the earphone 20 to communicate.

[0045] The following will explain these two situations in detail, such as... Figure 1 As shown, when the earphone 20 is inserted into the earphone case 10, the first switch assembly 140 and the second switch assembly 240 are typically in the off state. Here, the power supply 120, the first contact 150, the third contact 250, and the battery 220 form the second charging path. Simultaneously, the first signal terminal 130, the second contact 160, the fourth contact 260, and the second signal terminal 230 form the second communication path, enabling the earphone case 10 and the earphone 20 to establish a communication handshake. After a successful communication handshake, the earphone case 10 can supply power to the earphone 20 through the second charging path.

[0046] In the event of a malfunction in the second communication path, the first processor 110 will control the first switch assembly 140 to be in a conducting state, and the second processor 210 will control the second switch 240 to be in a conducting state. Here, the first signal terminal 130, the first contact 150, the third contact 250, and the second signal terminal 230 constitute the first communication path for communication with the earphone 10. Since both the first and third contacts are power contacts, in the event of a malfunction in the communication path, the charging path of the earphone will be utilized to ensure normal communication between the earphone case and the earphone.

[0047] Next, combine Figure 2 and Figure 4 Here is a detailed explanation of the working process of charging system 1:

[0048] Step 401: Check if the earphones are inserted into the earphone case. If yes, proceed to step 402; otherwise, continue with step 401.

[0049] Step 402: With the earphones inserted into the earphone case, the first and second switch components are in the off state by default, while the third and fourth switch components are in the on state by default. Check whether the second communication path formed by the first signal terminal, the second contact, the fourth contact, and the second signal terminal is normal. If yes, proceed to step 403; otherwise, proceed to step 407.

[0050] Step 403: If the second communication path is normal, check whether the second charging path consisting of the power supply, the first contact, the third contact, and the battery is normal. If it is normal, proceed to step 406; otherwise, proceed to step 404.

[0051] Step 404: In the event of an abnormality in the second charging path, the first processor controls the first switching component to be in the ON state and controls the third switching component to be in the OFF state; the second processor controls the second switching component to be in the ON state and controls the fourth switching component to be in the OFF state. Here, the power supply, the second contact, the fourth contact, and the battery constitute the first charging path, and the earphone case charges the earphones based on the second charging path. (Refer to...) Figure 2 Line 1 is shown.

[0052] Step 405: When the earphone battery is fully charged, the first processor controls the first switch component to be in the off state and controls the third switch component to be in the on state, the second processor controls the second switch component to be in the off state and controls the fourth switch component to be in the on state, so that normal communication is maintained through the second communication path, and the process ends.

[0053] Step 406: If the second charging path is normal, the earphone case supplies power to the earphones based on the second charging path, that is, maintains normal charging, and the process ends.

[0054] Step 407: If the second communication path is abnormal, check if the first charging path is normal. If it is normal, proceed to step 408. Otherwise, the earphone case cannot charge the earphones, and the process ends.

[0055] Step 408: When the first charging path is normal, the first processor controls the first switching component to be in a conducting state, and the second processor component controls the second switching component to be in a conducting state. Here, the first signal terminal, the first contact, the third contact, and the second signal terminal constitute the first communication path. The earphone box communicates with the earphones based on the first communication path, as shown in the reference. Figure 2 Line 2 is shown.

[0056] Step 409: After the earphone case and earphones complete the communication handshake, the first processor controls the first switch component to be in the off state, the second processor controls the second switch component to be in the off state, and the earphone case supplies power to the earphones based on the second charging path, that is, maintains normal charging.

[0057] Step 410: When the earphone battery is fully charged, the first processor controls the first switch component to be in the conducting state, and the second processor controls the second switch component to be in the conducting state. Here, the first signal terminal, the first contact, the third contact, and the second signal terminal constitute the first communication path. The earphone box continues to communicate with the earphone based on the first communication path, and the process ends.

[0058] Based on this example, when the earphones are plugged into the charging case, if one of the charging channels experiences a connection abnormality due to foreign objects, corrosion, or a detached spring, it can be controlled to switch to another channel to ensure that the charging process can continue. This also prevents high-voltage damage to the signal interface, enhances the reliability of the charging channel, and improves the user experience.

[0059] In one embodiment, due to the complex user environment during daily use, the charging contacts of the earphone case, being deeply recessed, may experience short circuits due to liquid ingress or corrosion. To further improve reliability, hardware can automatically identify short circuits and initiate a switching action. (Refer to...) Figure 3 As shown, the earphone box 10 also includes a fifth switch assembly 180, a sixth switch assembly 190, a first resistor R1, a gate circuit U1, a first inverter U3, and a second inverter U2.

[0060] The first end of the fifth switch assembly 180 is connected to the first contact 150, the second end of the fifth switch assembly 180 is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the power supply 120, the control end of the fifth switch assembly 180 is connected to the output end of the first inverter U3, and the input end of the first inverter U3 is connected to the first end of the first resistor R1.

[0061] The first input terminal of the gate circuit U1 is connected to the power supply 120, the second input terminal of the gate circuit U1 is connected to the first end of the first resistor R1, the third input terminal of the gate circuit U1 is connected to the first signal terminal 130, the output terminal of the gate circuit U1 is connected to the control terminal of the first switch assembly 140, the first end of the first switch assembly 140 is connected to the first contact 150 through the fifth switch assembly 180, and the second end of the first switch assembly 140 is connected to the second contact 160 through the sixth switch assembly 190.

[0062] The first end of the sixth switch assembly 190 is connected to the second contact 160, the second end of the sixth switch assembly 190 is connected to the first signal terminal 130, the control terminal of the sixth switch assembly 190 is connected to the output terminal of the second inverter U2, and the input terminal of the second inverter U2 is connected to the second signal terminal 130.

[0063] Among them, gate circuit U1 is a NAND gate circuit with three input terminals. When one of the input terminals is 0, the NAND gate circuit outputs a high level, controlling the first switch component 140 to conduct.

[0064] The fifth switching component is a PMOS transistor. The gate of the PMOS transistor is connected to the output terminal of the first inverter, the drain of the PMOS transistor is connected to the first terminal of the first resistor, and the source of the PMOS transistor is connected to the first contact. The fifth switching component is in the on state by default.

[0065] The sixth switching component is a PMOS transistor. The gate of the PMOS transistor is connected to the output terminal of the second inverter, the drain of the PMOS transistor is connected to the first signal terminal, and the source of the PMOS transistor is connected to the second contact. The sixth switching component is in the on state by default.

[0066] In a specific scenario, when a short circuit is detected in the second charging path consisting of the power supply, the first contact, the third contact, and the battery (if the short circuit occurs at the first and third contacts, the voltage at point a on the right side of the first resistor R1 will be 0), the first inverter U3 will output a high level as input, controlling the fifth switch assembly 180 to open.

[0067] When a short circuit is detected in the second charging path (if a short circuit occurs at the first and third contacts, the voltage at point a to the right of the first resistor R1 is 0), it serves as the input to the NAND gate U1, controlling the first switching component 140 to turn on.

[0068] In a specific scenario, when a short circuit is detected in the second communication path formed by the first signal terminal, the second contact, the fourth contact, and the second signal terminal (if the short circuit occurs at the second contact and the fourth contact, the voltage at point b of the first signal terminal 130 will be 0), the second inverter U2 will output a high level as input, controlling the sixth switch assembly 190 to open.

[0069] When a short circuit is detected in the second communication path (if a short circuit occurs at the third and fourth contacts, the voltage at point b of the first signal terminal 130 is 0), it serves as the input to the NAND gate circuit U1, controlling the first switching component 140 to conduct.

[0070] Next, combine Figure 3 and Figure 5 Here is a detailed explanation of the working process of charging system 1:

[0071] Step 501: Check if the earphones are inserted into the earphone case. If yes, proceed to step 502; otherwise, continue with step 501.

[0072] Step 502: With the earphones inserted into the earphone case, the first and second switch components are in the off state by default, while the third and fourth switch components are in the on state by default. The system detects whether the second communication path formed by the first signal terminal, the second contact, the fourth contact, and the second signal terminal is short-circuited, and whether the second charging path formed by the power supply, the first contact, the third contact, and the battery is short-circuited. If the second charging path is short-circuited, proceed to step 503; if the second communication path is short-circuited, proceed to step 507; if neither the second communication path nor the second charging path is short-circuited, proceed to step 512.

[0073] Step 503: In the case of a short circuit in the second charging path, the first inverter U3 outputs a high level, controlling the fifth switch assembly 180 to disconnect, and the NAND gate circuit U1 outputs a high level, controlling the first switch assembly 140 to conduct.

[0074] Step 504: Check if the second communication path is normal. If the second communication path is normal, proceed to step 505. Otherwise, it indicates that the second communication path is also abnormal, the earphone case cannot charge the earphones, and the process ends.

[0075] In step 505, the first processor controls the first switch assembly to be in the conducting state, and the second processor controls the second switch assembly to be in the conducting state. Here, the power supply, the second contact, the fourth contact, and the battery constitute the first charging path so that the earphone case can charge the earphones.

[0076] Step 506: When the earphone battery is fully charged, the first processor controls the first switch component to be in the off state, the second processor controls the second switch component to be in the off state, the earphone case maintains normal communication with the earphone based on the second communication path, and the process ends.

[0077] Step 507: In the case of a short circuit in the second communication path, the first inverter U3 outputs a high level, controlling the sixth switch assembly 190 to disconnect, and the NAND gate circuit U1 outputs a high level, controlling the first switch assembly 140 to conduct.

[0078] Step 508: Check if the second charging path is normal. If the second charging path is normal, proceed to step 509. Otherwise, it indicates that the second charging path is also abnormal, the earphone case cannot charge the earphones, and the process ends.

[0079] Step 509: When the second charging path is normal, the first processor controls the first switch assembly to be in the conducting state, and the second processor controls the second switch assembly to be in the conducting state. Here, the first signal terminal, the first contact, the third contact, and the second signal terminal constitute the first communication path to enable communication between the earphone case and the earphone.

[0080] Step 510: After the earphone case and earphones complete the communication handshake, the first processor controls the first switch component to be in the off state, the second processor controls the second switch component to be in the off state, and the earphone case continues to supply power to the battery based on the second charging path, that is, maintain normal charging.

[0081] Step 511: When the earphone battery is fully charged, the first processor controls the first switch assembly to be in the conducting state, and the second processor controls the second switch assembly to be in the conducting state. Here, the first signal terminal, the first contact, the third contact, and the second signal terminal constitute the first communication path to enable communication between the earphone case and the earphone. The process ends.

[0082] Step 512: If neither the second communication path nor the second charging path is short-circuited, check if the second communication path is normal. If the second communication path is normal, proceed to step 513. If the second communication path is abnormal, proceed to step 508.

[0083] Step 513: Check if the second charging path is normal. If the second charging path is abnormal, proceed to step 505. Otherwise, if the second charging path is normal, the earphone box supplies power to the battery based on the second charging path, that is, maintains normal charging, and the process ends.

[0084] Based on this example, a short-circuit detection and automatic switching circuit is added. If the headphones cannot charge or communicate due to a short circuit, the circuit can be automatically switched (the hardware is faster) to enable normal charging and communication, avoid damage to the headphone components, and improve product reliability and user experience.

[0085] This application also provides an earphone case, which may be a TWS earphone case.

[0086] like Figure 1 As shown, the earphone case 10 is provided with a first charging circuit, a first signal terminal 130, a power supply 120, and a first processor 110; the first charging circuit includes a first contact 150, a second contact 160, and a first switch assembly 140. The first contact 150 is electrically connected to the power supply 120, the second contact 160 is electrically connected to the first signal terminal 130, the first end of the first switch assembly 140 is electrically connected to the first contact 150, the second end of the first switch assembly 140 is electrically connected to the second contact 160, and the control terminal of the first switch assembly 140 is electrically connected to the first processor 110.

[0087] According to an embodiment of this application, when the first switch assembly and the second switch assembly of the earphone are connected, the power supply, the second contact, the fourth contact of the earphone, and the battery of the earphone constitute a first charging path to charge the earphone. When the first switch assembly and the second switch assembly are disconnected, the power supply, the first contact, the third contact, and the battery constitute a second charging path to charge the earphone. It is understood that the second charging path is the charging path when the earphone is normally charging the earphone. When the first charging path is abnormal, the system switches to the second charging path to allow the earphone to continue charging the earphone, thereby ensuring that the charging process continues.

[0088] This application also provides an earphone, which may be a TWS earphone.

[0089] like Figure 1 As shown, the earphone is equipped with a second charging circuit, a second signal terminal 230, a battery 240, and a second processor 210. The second charging circuit includes a third contact 250, a fourth contact 260, and a second switch assembly 240. The third contact 250 is electrically connected to the battery 220, the fourth contact 260 is electrically connected to the second signal terminal 230, the first end of the second switch assembly 240 is electrically connected to the third contact 250, the second end of the second switch assembly 240 is electrically connected to the fourth contact 260, and the control terminal of the second switch assembly 240 is electrically connected to the second processor 210.

[0090] According to an embodiment of this application, when the first switch assembly of the earphone case and the second switch assembly of the earphone are connected, the power supply of the earphone case, the second contact of the earphone case, the fourth contact of the earphone, and the battery of the earphone constitute a first charging path to charge the earphone. When the first and second switch assemblies are disconnected, the power supply, the first contact, the third contact, and the battery constitute a second charging path to charge the earphone. It is understood that the second charging path is the charging path when the earphone case is normally charging the earphone. When the first charging path is abnormal, the system switches to the second charging path to allow the earphone case to continue charging the earphone, thereby ensuring that the charging process continues.

[0091] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0092] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A charging system, characterized in that, It includes a first charging circuit and a second charging circuit, wherein the first charging circuit is disposed in the earphone case and the second charging circuit is disposed in the earphone; The earphone case further includes a first signal terminal, a power supply and a first processor, and the earphones further include a second signal terminal, a battery and a second processor; The first charging circuit includes a first contact, a second contact, and a first switch assembly. The first contact is electrically connected to the power supply, the second contact is electrically connected to the first signal terminal, the first terminal of the first switch assembly is electrically connected to the first contact, the second terminal of the first switch assembly is electrically connected to the second contact, and the control terminal of the first switch assembly is electrically connected to the first processor. The second charging circuit includes a third contact, a fourth contact, and a second switch assembly. The third contact is electrically connected to the battery, the fourth contact is electrically connected to the second signal terminal, the first terminal of the second switch assembly is electrically connected to the third contact, the second terminal of the second switch assembly is electrically connected to the fourth contact, and the control terminal of the second switch assembly is electrically connected to the second processor. When the first switch assembly and the second switch assembly are turned on, the power supply, the second contact, the fourth contact and the battery constitute a first charging path so that the earphone case can charge the earphones; When the first switch assembly and the second switch assembly are disconnected, the power supply, the first contact, the third contact, and the battery constitute a second charging path to enable the earphone case to charge the earphones.

2. The charging system according to claim 1, characterized in that, When the first switch assembly and the second switch assembly are turned on, the first signal terminal, the first contact, the third contact, and the second signal terminal constitute a first communication path to enable the earphone case and the earphone to communicate. When the first switch assembly and the second switch assembly are disconnected, the first signal terminal, the second contact, the fourth contact, and the second signal terminal constitute a second communication path to enable communication between the earphone case and the earphone.

3. The charging system according to claim 1, characterized in that, The first charging path further includes a third switching component, wherein a first end of the third switching component is connected to the second contact, a second end of the third switching component is connected to the first signal end, and a control end of the third switching component is connected to the first processor; The second charging path further includes a fourth switching component, the first end of which is connected to the fourth contact, the second end of which is connected to the second signal terminal, and the control terminal of which is connected to the second processor. When the first and second switch components are turned on and the third and fourth switch components are turned off, the power supply, the second contact, the fourth contact, and the battery constitute a first charging path to enable the earphone case to charge the earphones.

4. The charging system according to claim 1, characterized in that, The first charging path further includes a fifth switching component, a sixth switching component, a first resistor, a gate circuit, a first inverter, and a second inverter. The first end of the fifth switch assembly is connected to the first contact, the second end of the fifth switch assembly is connected to the first end of the first resistor, the second end of the first resistor is connected to the power supply, the control end of the fifth switch assembly is connected to the output end of the first inverter, and the input end of the first inverter is connected to the first end of the first resistor. The first input terminal of the gate circuit is connected to the power supply, the second input terminal of the gate circuit is connected to the first end of the first resistor, the third input terminal of the gate circuit is connected to the first signal terminal, the output terminal of the gate circuit is connected to the control terminal of the first switch assembly, the first end of the first switch assembly is connected to the first contact through the fifth switch assembly, and the second end of the first switch assembly is connected to the second contact through the sixth switch assembly. The first end of the sixth switch assembly is connected to the second contact, the second end of the sixth switch assembly is connected to the first signal end, the control end of the sixth switch assembly is connected to the output end of the second inverter, and the input end of the second inverter is connected to the second signal end.

5. The charging system according to claim 4, characterized in that, The gate circuit is a NAND gate circuit.

6. The charging system according to claim 1, characterized in that, The first switching component is an NMOS transistor, the drain of the NMOS transistor is connected to the first contact, the gate of the NMOS transistor is connected to the first processor, and the source of the NMOS transistor is connected to the second contact. The second switching component is an NMOS transistor, the drain of which is connected to the third contact, the gate of which is connected to the second processor, and the source of which is connected to the fourth contact.

7. The charging system according to claim 3, characterized in that, The third switching component is an NMOS transistor, the drain of which is connected to the first signal terminal, the gate of which is connected to the first processor, and the source of which is connected to the first contact. The fourth switching component is an NMOS transistor. The drain of the NMOS transistor is connected to the fourth contact, the gate of the NMOS transistor is connected to the second processor, and the source of the NMOS transistor is connected to the second signal terminal.

8. The charging system according to claim 4, characterized in that, The fifth switching component is a PMOS transistor. The gate of the PMOS transistor is connected to the output terminal of the first inverter, the drain of the PMOS transistor is connected to the first terminal of the first resistor, and the source of the PMOS transistor is connected to the first contact. The sixth switching component is a PMOS transistor. The gate of the PMOS transistor is connected to the output terminal of the second inverter, the drain of the PMOS transistor is connected to the first signal terminal, and the source of the PMOS transistor is connected to the second contact.

9. An earphone case, characterized in that, The earphone case is provided with a first charging circuit, a first signal terminal, a power supply and a first processor; The first charging circuit includes a first contact, a second contact, and a first switch assembly. The first contact is electrically connected to the power supply, the second contact is electrically connected to the first signal terminal, the first end of the first switch assembly is electrically connected to the first contact, the second end of the first switch assembly is electrically connected to the second contact, and the control terminal of the first switch assembly is electrically connected to the first processor.

10. An earphone, characterized in that, The earphone is equipped with a second charging circuit, a second signal terminal, a battery, and a second processor; The second charging circuit includes a third contact, a fourth contact, and a second switch assembly. The third contact is electrically connected to the battery, the fourth contact is electrically connected to the second signal terminal, the first terminal of the second switch assembly is electrically connected to the third contact, the second terminal of the second switch assembly is electrically connected to the fourth contact, and the control terminal of the second switch assembly is electrically connected to the second processor.

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