A control circuit and method for charging box

Abstract

A control circuit and method for a charging box, the control circuit includes a connecting component, an electrolytic component and a main control circuit. When the connecting component is connected, the power of the power supply is transmitted to the earphone, and the electrolytic component has a second voltage. When there is an electrolyte solution on the connecting component or the earphone, an electrolytic reaction occurs between the electrolyte solution and the electrolytic component, and the second voltage changes. The main control circuit detects the voltage of the electrolytic component, and when a change in the second voltage is detected, the voltage of the connecting component and the voltage of the electrolytic component are adjusted to an equipotential state. The above control circuit and method, when it is determined that there is an electrolyte solution (such as sweat, water stains, etc.) on the connecting component or the earphone, adjusts the voltage of the connecting component and the voltage of the electrolytic component to an equipotential state, thereby stopping the electrolytic reaction, avoiding corrosion of the charging contacts of the connecting component and the earphone, and extending the service life of the charging box and the wireless earphone.

Description

Technical Field

[0001] The present application belongs to the technical field of charging boxes, and in particular, relates to a control circuit and method for a charging box. Background Art

[0002] In recent years, the number of users of wireless headphones has increased sharply. Wireless headphones are small in size and cannot be equipped with large-capacity batteries inside the body, so wireless headphones are often used in conjunction with charging boxes. The charging box has exposed power supply contacts, which are used to connect to the exposed charging contacts of the wireless headphones to achieve charging. However, since the power supply contacts and charging contacts are exposed, they are easily stained with electrolyte solutions such as sweat or water stains, which leads to electrolytic reactions during the charging process, resulting in reduced energy utilization and rapid corrosion of the power supply contacts and charging contacts, which aggravates the aging process of the charging box and wireless headphones and shortens the service life of the charging box and wireless headphones.

[0003] Therefore, in the traditional charging box power supply technology solution, there is a problem that the wireless earphones are prone to electrolysis reaction when charging with the charging box, which leads to reduced energy utilization and shortened service life of the charging box and the wireless earphones. Summary of the invention

[0004] The purpose of the present application is to provide a control circuit and method for a charging box, aiming to solve the problem existing in the traditional charging box power supply technology solution that the wireless earphones are prone to electrolysis reaction during charging using the charging box, resulting in reduced power utilization and shortened service life of the charging box and wireless earphones.

[0005] A first aspect of an embodiment of the present application provides a control circuit for a charging box, wherein the charging box includes a power supply for powering a connected headset, the power supply has a first voltage, and the control circuit includes:

[0006] A connecting component, connected to the power supply and the earphone, and used for transmitting the power of the power supply to the earphone when connected to the power supply;

[0007] an electrolytic component connected to a power supply device, the power supply device providing a second voltage, for indicating a change in the second voltage by causing an electrolytic reaction between the electrolyte solution and the connecting component when an electrolyte solution is present on the connecting component or the earphone; and

[0008] The main control circuit is connected to the electrolytic component and the power supply, and is used to control the connection component and the electrolytic component to be at the same potential when detecting a change in the second voltage.

[0009] Optionally, the main control circuit includes:

[0010] a switch circuit connected to the connection assembly and the electrolytic assembly, for connecting the connection assembly to the power source and the electrolytic assembly to the power supply device when closed, and disconnecting the connection assembly from the power source and the electrolytic assembly from the power supply device when closed; and

[0011] The main control component is connected to the electrolytic component and the switch circuit, and is used to detect the voltage of the electrolytic component, control the switch circuit to close when the second voltage is detected, and control the switch circuit to close when a change in the second voltage is detected.

[0012] The above-mentioned main control circuit is connected to the connecting component and the electrolytic component through the switching circuit. When the main control component determines that an electrolytic reaction is occurring in the electrolytic component, the switching circuit is controlled to be disconnected, so that the power supply cannot output electrical energy to the connecting component, and the voltage at the connecting component is reset to zero. At the same time, the voltage of the electrolytic component is reset to zero. Therefore, when there is an electrolyte solution (such as sweat, water stains, etc.) on the connecting component or the earphone, the voltage of the connecting component and the voltage of the electrolytic component are adjusted to an equipotential state of 0V to avoid corrosion of the charging contacts of the connecting component and the earphone, thereby extending the service life of the charging box and the wireless earphone.

[0013] Optionally, the main control circuit includes:

[0014] a regulating circuit connected to the power supply and the power supply device, and configured to regulate the power supply and the power supply device to an equal potential upon receiving a regulating control signal; and

[0015] A main control component is connected to the electrolytic component and the regulating circuit, and is used to detect the voltage of the electrolytic component, control the regulating circuit to stop working when the second voltage is detected, and output the regulating control signal to the regulating circuit when a change in the second voltage is detected.

[0016] When the main control circuit determines that the electrolytic component is undergoing an electrolytic reaction, it directly controls and adjusts the voltage of the power supply and the voltage of the electrolytic component so that the power supply and the power supply device are at the same potential. Since the voltage at the connecting component is the voltage of the power supply, and the voltage at the electrolytic component is the voltage of the power supply device, the voltage of the connecting component and the electrolytic component are at the same potential, thereby avoiding corrosion of the charging contacts of the connecting component and the earphone, and extending the service life of the charging box and the wireless earphone. In this embodiment, after being adjusted to the same potential, the voltage of the power supply 100 and the power supply device can be 0V or not.

[0017] Optionally, the connecting component is implemented by two metal contacts or two spring pins; one of the metal contacts / the spring pins is connected to the positive pole of the power supply, and the other metal contact / the spring pin is connected to the negative pole of the power supply; the electrolytic component is arranged in the area between the two metal contacts / the two spring pins.

[0018] Two metal contacts or two spring pins are used as connecting components to achieve stable power transmission and efficiently charge the connected earphones. The electrolytic component is set between the two metal contacts or two spring pins. When there is an electrolyte solution in the area between the metal contacts / spring pins and the electrolytic component, the voltage of the electrolytic component changes and the change is fed back to the main control circuit, thereby stopping the electrolytic reaction, avoiding corrosion of the connecting component and the charging contacts of the earphones, and extending the service life of the charging box and wireless earphones.

[0019] Optionally, also include:

[0020] An alarm circuit, connected to the main control circuit, for giving an alarm when receiving an alarm control signal;

[0021] The main control circuit is further configured to output the alarm control signal to the alarm circuit when detecting a change in the second voltage.

[0022] The above alarm circuit can promptly remind users to wipe the inside of the earphones and the charging box to remove sweat, water stains and other electrolyte solutions, thereby improving the user experience.

[0023] A second aspect of an embodiment of the present application provides a control method based on the control circuit for a charging box, wherein the charging box includes a power supply for powering a connected headset, the power supply has a first voltage, and the control method includes:

[0024] Using a connection component to transmit power from the power source to the earphone when connected;

[0025] When an electrolyte solution is present on the connection component or the earphone, an electrolytic reaction occurs between the electrolyte solution and the connection component, indicating that the second voltage changes;

[0026] The main control circuit is used to detect the voltage of the electrolytic component, and when a change in the second voltage is detected, the connecting component and the electrolytic component are adjusted to an equipotential state.

[0027] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the above-mentioned control circuit and method for a charging box, through the cooperation of the electrolytic component and the main control circuit, monitors whether an electrolytic reaction occurs between the connecting component and the electrolytic component during the charging process of the earphone using the charging box; when the main control circuit detects a change in the second voltage, it determines whether there is an electrolyte solution (such as sweat, water stains, etc.) on the connecting component or the earphone, and whether an electrolytic reaction occurs between the connecting component and the electrolytic component; at this time, the voltage of the connecting component and the voltage of the electrolytic component are adjusted to an equipotential state, thereby stopping the electrolytic reaction, avoiding corrosion of the charging contacts of the connecting component and the earphone, extending the service life of the charging box and the wireless earphone, and ensuring that charging is performed only when there is no electrolyte solution on the connecting component or the earphone, thereby ensuring a higher energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a module structure of a control circuit for a charging box provided in one embodiment of the present application;

[0029] FIG2( a) is a schematic diagram of a module structure of a control circuit for a charging box provided in another embodiment of the present application;

[0030] FIG. 2( b ) is a schematic diagram of a module structure of a control circuit for a charging box provided in another embodiment of the present application.

[0031] Figure 3 A schematic diagram of a module structure of a control circuit for a charging box provided in another embodiment of the present application;

[0032] Figure 4 for Figure 1 , 2 or 3, an example structural diagram of the connected components in the control circuit;

[0033] Figure 5 for Figure 1 , 2 or 3, an example structural diagram of an electrolytic component in a control circuit;

[0034] Figure 6 for Figure 4 and Figure 5 An example schematic diagram of a control circuit for a charging box combined with the technical solution of ;

[0035] FIG. 7( a ) is an exemplary circuit schematic diagram of a main control component in the control circuit shown in FIG. 2( a );

[0036] FIG7( b ) is an exemplary circuit schematic diagram of a main control component in the control circuit shown in FIG2( b );

[0037] Figure 8 for Figure 3 An example circuit schematic diagram of the main control circuit in the control circuit shown;

[0038] Fig. 9 is an exemplary circuit schematic diagram of a switch circuit in the control circuit shown in FIG2(a);

[0039] Fig.10 A specific circuit schematic diagram of a control circuit for a charging box provided in one embodiment of the present application;

[0040] Fig.11 A specific circuit schematic diagram of a control circuit for a charging box provided in another embodiment of the present application;

[0041] Fig.12 A specific flow chart of a control method for a charging box provided in one embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] See also Figure 1 , is a schematic diagram of a module structure of a control circuit for a charging box provided in an embodiment of the present application. For the sake of convenience, only the part related to the present embodiment is shown, which is described in detail as follows:

[0045] A control circuit for a charging box, the charging box includes a power supply 100 for powering a connected earphone 200, and the power supply 100 has a first voltage.

[0046] The control circuit includes a connection component 10 , an electrolytic component 20 and a main control circuit 30 .

[0047] The connection component 10 is connected to the power supply 100 and the earphone 200; the electrolytic component 20 has a second voltage, and the electrolytic component 20 can perform an electrolytic reaction with the connection component 10 through an electrolyte solution; the main control circuit 30 is connected to the electrolytic component 20 and the power supply 100, and is also connected to the connection component 10 or the power supply 100. The electrolytic component 20 is connected to the power supply device 300, and the power supply device 300 provides the second voltage.

[0048] The connecting component 10 is used to transmit the power of the power source 100 to the earphone 200 when connected to the power source 100 .

[0049] The electrolytic component 20 has a second voltage. When an electrolyte solution exists on the connecting component 10 or the earphone 200 , the electrolytic component 20 is used to generate an electrolytic reaction between the electrolyte solution and the connecting component 10 to indicate that the second voltage changes.

[0050] Specifically, the first voltage and the second voltage have a non-zero voltage difference. The electrolyte solution is a liquid such as sweat, rainwater, beverages, etc. The earphone 200 is easily stained with these electrolyte solutions during use and when the charging box is improperly stored.

[0051] The main control circuit 30 is used to detect the voltage of the electrolytic component 20, and when a change in the second voltage is detected, the voltage of the connecting component 10 and the voltage of the electrolytic component 20 are adjusted to an equipotential state.

[0052] Specifically, when the main control circuit 30 is connected to the power supply 100, the voltage of the power supply 100 can be directly adjusted, and the voltage of the electrolytic component 20 can be adjusted. Since the connecting component 10 itself does not have a voltage and is only used as a conductor for transmitting electrical energy, when the connecting component 10 is connected, the voltage of the power supply 100 is the voltage of the connecting component 10. Therefore, by directly adjusting the voltage of the power supply 100 and adjusting the voltage of the electrolytic component 20 to make the two consistent, the voltage of the connecting component 10 and the voltage of the electrolytic component 20 can be made to be in an equipotential state.

[0053] Specifically, the main control circuit 30 can also be connected to the connection component 10. In addition, the main control circuit 30 can be connected to the power supply 100 and the connection component 10 at the same time.

[0054] In an optional embodiment, the above-mentioned control circuit also includes an alarm circuit.

[0055] The alarm circuit is connected to the main control circuit 30 .

[0056] The alarm circuit is used to give an alarm when receiving an alarm control signal. The main control circuit 30 is also used to output an alarm control signal to the alarm circuit when detecting a change in the second voltage.

[0057] Specifically, the alarm circuit can be implemented by a buzzer to give an alarm through sound; in addition, the alarm circuit can also be implemented by a warning light to give an alarm through light, and the warning light can be implemented by a light emitting diode; in addition, the alarm circuit can also be implemented by a combination of a buzzer and a warning light.

[0058] The above alarm circuit can promptly remind the user to wipe the earphone 200 and the inside of the charging box to remove sweat, water stains and other electrolyte solutions, thereby improving the user experience.

[0059] Optionally, the control circuit provided in the present application is built into the charging box.

[0060] Please refer to FIG. 2( a ), which is a schematic diagram of a module structure of a control circuit for a charging box provided in another embodiment of the present application. For the sake of convenience, only the part related to the present embodiment is shown, which is described in detail as follows:

[0061] In an optional embodiment, the main control circuit 30 includes a switch circuit 31 and a main control component 32 .

[0062] a switch circuit connected to the connection assembly and the electrolytic assembly, for connecting the connection assembly to the power source and the electrolytic assembly to the power supply device when closed, and for disconnecting the connection assembly from the power source and the electrolytic assembly from the power supply device when closed; and

[0063] The main control component is connected to the electrolytic component and the switch circuit, and is used to detect the voltage of the electrolytic component. When the second voltage is detected, the switch circuit is controlled to be closed, and when a change in the second voltage is detected, the switch circuit is controlled to be closed.

[0064] The switch circuit 31 is connected to the connection component 10 and the electrolytic component 20 , and the main control component 32 is connected to the electrolytic component 20 and the switch circuit 31 .

[0065] The switch circuit 31 connects the connection component 10 with the power supply 100 and connects the electrolytic component 20 with the power supply device 300. When turned off, the connection component 10 is disconnected from the power supply 100 and the electrolytic component 20 is disconnected from the power supply device 300.

[0066] Specifically, the switch circuit 31 is connected in series to the connection line between the power supply 100 and the connection component 10, and is also connected in series to the connection line between the power supply device 300 and the electrolytic component 20. The connection component 10 and the electrolytic component 20 can be connected and disconnected accordingly by the on and off state of the switch circuit 31.

[0067] The main control component 32 is used to detect the voltage of the electrolytic component 20. When the second voltage is detected, the switch circuit 31 is controlled to be closed. When a change in the second voltage is detected, the switch circuit 31 is controlled to be closed and the voltage of the electrolytic component 20 is controlled to be zero.

[0068] Specifically, when the second voltage is detected to have changed, it indicates that the voltage of the electrolytic component 20 has changed due to the electrolytic reaction, and the main control component 32 controls the switch circuit 31 to be turned off, so that the connecting component 10 is disconnected, and thus the electric energy transmitted by the power supply 100 cannot be received, and the switch circuit 31 is controlled to be turned off, so that the electrolytic component 20 is disconnected, and thus the electric energy transmitted by the power supply device 300 cannot be received; the charging process of the earphone 200 is interrupted, and the voltages of the connecting component 10 and the electrolytic component 20 return to zero. Therefore, the voltage of the electrolytic component 20 and the voltage of the connecting component 10 are both 0V, and the two have the same potential.

[0069] The switch circuit 31 is in a closed state by default. When the main control component 32 detects that the second voltage changes, the switch circuit 31 is controlled to switch from the default closed state to the closed state.

[0070] For Figure 2(a), the control circuit provided in this embodiment may optionally include a timed wake-up circuit, which is connected to the switch circuit 31. When the main control component 32 detects that the second voltage has changed, it controls the switch circuit 31 to be disconnected, thereby triggering the timed wake-up circuit to work. The timed wake-up circuit is used to control the switch circuit 31 to be closed at preset time intervals, so that the power supply 100 can recharge the connected earphone 200, and the electrolytic component 20 can be connected to the power supply device 300 to obtain the second voltage. If there is still electrolyte solution such as sweat or water stains at this time, the main control component 32 will turn off the switch circuit 31 again. By adding a timed wake-up circuit, when the user does not wipe the electrolyte solution in time, the charging process can be restored by the timed wake-up circuit. When the electrolyte solution evaporates by itself, charging can be carried out smoothly and automatically, avoiding the situation where the user does not manually restore the charging process for a long time after the main control component 32 turns off the switch circuit 31.

[0071] The above-mentioned main control circuit 30 is connected to the connecting component 10 through the switching circuit 31. When the main control component 32 determines that the electrolytic component 20 is undergoing an electrolytic reaction, it controls the switching circuit 31 to disconnect, so that the power supply 100 cannot output electrical energy to the connecting component 10, and the voltage at the connecting component 10 and the voltage of the electrolytic component 20 are zero. Therefore, when there is an electrolyte solution (such as sweat, water stains, etc.) on the connecting component 10 or the earphone 200, the voltage of the connecting component 10 and the voltage of the electrolytic component 20 are adjusted to an equipotential state of 0V to avoid corrosion of the charging contacts of the connecting component 10 and the earphone 200, thereby extending the service life of the charging box and the wireless earphone 200.

[0072] FIG2( b ) is a schematic diagram of a module structure of a control circuit for a charging box provided in another embodiment of the present application. For the sake of convenience, only the parts related to the present embodiment are shown, which are described in detail as follows:

[0073] In an optional embodiment, the main control circuit 30 includes a regulating circuit 301 and a main control component 302 .

[0074] Among them, the regulating circuit 301 is connected to the power supply 100 and the power supply device 300, and the main control component 302 is connected to the electrolytic component 20 and the regulating circuit 301.

[0075] The regulating circuit 301 is used to adjust the power supply 100 and the power supply device 300 to the same potential when receiving the regulating control signal.

[0076] The main control component 302 is used to detect the voltage of the electrolytic component 20, and controls the regulating circuit 301 to stop working when the second voltage is detected, and outputs a regulating control signal to the regulating circuit 301 when a change in the second voltage is detected.

[0077] Specifically, when a change in the second voltage is detected, the main control component 302 drives the regulating circuit 301 to adjust the power supply 100 and the power supply device 300 to a third voltage, which may be 0V or not. The voltage of the power supply 100 is the voltage of the connecting component 10. When the third voltage is 0V, the connected earphone 200 cannot be charged, and the charging process is interrupted; when the third voltage is not 0V, the connected earphone 200 can continue to charge, and the voltage output by the power supply 100 is the third voltage. Since the voltage of the electrolytic component 20 is also the third voltage, which is the same potential as the connecting component 10, even if the earphone 200 continues to charge, the electrolytic reaction will not occur, and the charging process of the earphone 200 will not be interrupted.

[0078] For FIG. 2( b ), the control circuit 30 provided in this embodiment may optionally include a timed wake-up circuit, which is connected to the power supply 100 and the power supply device 300. When the main control circuit 30 detects a change in the second voltage, the power supply 100 and the power supply device 300 are adjusted to the same potential, thereby triggering the timed wake-up circuit to work. The timed wake-up circuit is used to control the power supply 100 to adjust from the third voltage back to the first voltage and the electrolytic component 20 to adjust from the third voltage back to the second voltage at preset time intervals. If there is still electrolyte solution such as sweat or water stains at this time, the main control circuit 30 adjusts the power supply 100 and the electrolytic component 20 to the same potential state again. By adding a timed wake-up circuit, when the user does not wipe the electrolyte solution in time, the charging process can be restored in time through the timed wake-up circuit. When the electrolyte solution evaporates by itself, charging can be carried out smoothly and automatically, avoiding the situation where the user does not manually restore the charging process for a long time after the main control circuit 30 turns off the switch circuit 31.

[0079] When the main control circuit 30 determines that an electrolytic reaction is occurring in the electrolytic component 20, it directly controls and adjusts the voltage of the power supply 100 and the voltage of the electrolytic component 20 to a third voltage. Since the voltage at the connecting component 10 is the voltage of the power supply 100, the voltage of the connecting component 10 and the voltage of the electrolytic component 20 are of equal potential, thereby avoiding corrosion of the charging contacts of the connecting component 10 and the earphone 200, and extending the service life of the charging box and the wireless earphone 200.

[0080] See also Figure 3 , is a schematic diagram of a module structure of a control circuit for a charging box provided in another embodiment of the present application. For the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0081] In an optional embodiment, the main control circuit 30 is implemented by a main control chip MCU. The MCU is directly connected to the power supply 100 and the power supply device 300, and directly controls and adjusts the voltage of the power supply 100 and the voltage of the power supply device 300.

[0082] When the main control chip MCU detects that the second voltage changes, it adjusts the voltage of the power supply 100 and the voltage of the electrolytic component 20 to the same potential, specifically, adjusts the two to the third voltage.

[0083] Specifically, the third voltage may be 0V or not; the voltage of the power supply 100 is the voltage of the connection component 10. When the third voltage is 0V, the connected earphone 200 cannot be charged and the charging process is interrupted; when the third voltage is not 0V, the connected earphone 200 can continue to be charged, and the voltage output by the power supply 100 is the third voltage. Since the voltage of the electrolytic component 20 is also the third voltage, even if the earphone 200 continues to be charged, no electrolysis reaction will occur, and the charging process of the earphone 200 will not be interrupted.

[0084] for Figure 3 Optionally, the control circuit provided in this embodiment may also include a timed wake-up circuit, which is connected to the power supply 100 and the electrolytic component 20. When the main control chip MCU detects that the second voltage has changed, the power supply 100 and the power supply device 300 are adjusted to the same potential, thereby triggering the timed wake-up circuit to work. The timed wake-up circuit is used to control the power supply 100 to adjust from the third voltage back to the first voltage and the electrolytic component 20 to adjust from the fourth voltage back to the second voltage every preset time. If there is still electrolyte solution such as sweat and water stains at this time, the main control chip MCU will adjust the power supply 100 and the electrolytic component 20 to the same potential state again. By adding a timed wake-up circuit, when the user does not wipe the electrolyte solution in time, the charging process can be restored in time through the timed wake-up circuit. When the electrolyte solution evaporates by itself, charging can be carried out smoothly and automatically, avoiding the situation where the user does not manually restore the charging process for a long time after the main control chip MCU turns off the switch circuit 31.

[0085] When the main control chip MCU determines that an electrolysis reaction is occurring in the electrolytic component 20, it directly controls and adjusts the voltage of the power supply 100 and the voltage of the electrolytic component 20 to be equal potential. Since the voltage at the connecting component 10 is the voltage of the power supply 100, the voltage of the connecting component 10 and the voltage of the electrolytic component 20 are equal potential, thereby avoiding corrosion of the charging contacts of the connecting component 10 and the earphone 200 and extending the service life of the charging box and the wireless earphone 200.

[0086] See also Figure 4 for Figure 1 , 2 or 3, in the control circuit shown in the example structure diagram of the connecting component 10, for the convenience of explanation, only the part related to the present embodiment is shown, and the details are as follows:

[0087] In an optional embodiment, the above-mentioned connection component 10 is implemented by two metal contacts or two spring pins a1 and a2.

[0088] The metal contact piece / spring pin a1 is connected to the positive electrode of the power source 100, and the metal contact piece / spring pin a2 is connected to the negative electrode of the power source 100; the electrolytic component 20 is arranged in the area between the two metal contact pieces / two spring pins a1 and a2.

[0089] Specifically, the electrolytic component 20 is not in direct contact with the two metal contacts / two spring pins a1 and a2 in the connecting component 10. When an electrolyte solution exists in the area between the electrolytic component 20 and the metal contacts / two spring pins a1 and a2, the electrolyte solution serves as a channel connecting the electrolytic component 20 and the metal contacts / two spring pins a1 and a2, and an electrolytic reaction occurs, thereby causing the voltage of the electrolytic component 20 to change.

[0090] The spring ejector is also called a spring pin, spring probe or PogoPin connector. It is formed by riveting three basic parts, a needle, a needle tube and a spring, with precision instruments. The bottom of the spring ejector needle is usually a bevel structure, which ensures that the spring ejector needle keeps in contact with the inner wall of the needle tube during operation, allowing current to pass through the gold-plated needle and needle tube, ensuring the stability and low impedance characteristics of the spring ejector. Since the spring ejector is a very fine probe, the volume can be very small, saving space and beautifying the appearance of the product.

[0091] Two metal contacts or two spring pins a1 and a2 are used as the connection component 10 to achieve stable power transmission and efficiently charge the connected earphone 200. The electrolytic component 20 is arranged between the two metal contacts or the two spring pins. When there is an electrolyte solution in the area between the metal contacts / spring pins a1 and a2 and the electrolytic component 20, the voltage of the electrolytic component 20 changes, and the change is fed back to the main control circuit 30, thereby stopping the electrolytic reaction, avoiding corrosion of the charging contacts of the connection component 10 and the earphone 200, and extending the service life of the charging box and the wireless earphone 200.

[0092] See also Figure 5 ,for Figure 1 , 2 or 3, for the sake of convenience, only the parts related to this embodiment are shown, which are described in detail as follows:

[0093] In an optional embodiment, the electrolytic assembly 20 is implemented by using a metal contact or a spring pin a3.

[0094] Specifically, the second voltage of the metal contact piece / spring pin a3 is provided by an external power supply device 300 , and the power supply device 300 is not the power supply 100 .

[0095] See also Figure 6 ,for Figure 4 and Figure 5 An example schematic diagram of a control circuit for a charging box combined with the technical solution of FIG. 1 is shown in FIG. 1 for ease of explanation, and only the part related to this embodiment is shown, which is described in detail as follows:

[0096] In an optional embodiment, the connection component 10 is implemented by two metal contacts or two spring pins, and the electrolytic component 20 is implemented by metal contacts or spring pins.

[0097] The metal contact piece / spring pin a1 is connected to the positive electrode of the power source 100, and the other metal contact piece / spring pin a2 is connected to the negative electrode of the power source 100; the metal contact piece / spring pin a3 is arranged in the area between the metal contact piece / spring pin a1 and the metal contact piece / spring pin a2.

[0098] Furthermore, in actual work, the connection component 10 is implemented by a pair of metal contacts a1 and a2, and the electrolytic component 20 is implemented by a metal contact a3 to ensure consistency.

[0099] Furthermore, in actual work, the connection component 10 is implemented by a pair of spring pins a1 and a2, and the electrolytic component 20 is implemented by a spring pin a3 to ensure consistency.

[0100] Please refer to FIG. 7( a ), which is an exemplary circuit schematic diagram of the main control component 32 in the control circuit shown in FIG. 2( a ). For ease of explanation, only the part related to the present embodiment is shown, which is described in detail as follows:

[0101] In an optional embodiment, the main control component 32 is implemented by a single-chip microcomputer MCU1, and a detection port of the single-chip microcomputer MCU1 is connected to the electrolytic component 20 for receiving the voltage fed back by the electrolytic component 20. A control port of the single-chip microcomputer MCU1 is connected to the switch circuit 31 for controlling the switch circuit 31 to close or close, and another control port of the single-chip microcomputer MCU1 is connected to the electrolytic component 20 to control the voltage of the electrolytic component 20.

[0102] Specifically, the analog-to-digital conversion unit inside the single-chip microcomputer MCU1 is used to detect the voltage change of the electrolytic component 20. Optionally, the control port of the single-chip microcomputer MCU1 can also be connected to the power supply 100 and the power supply device 300 external to the electrolytic component 20 to adjust the voltage output by the power supply device 300.

[0103] In other optional embodiments, the main control component 32 can also be implemented by a voltage comparator. Specifically, the positive input terminal of the voltage comparator is connected to the electrolytic component 20 to receive the voltage fed back by the electrolytic component 20, the negative input terminal of the voltage comparator is connected to a reference signal, the value of the reference signal is equal to the value of the second voltage, and the output terminal of the voltage comparator is connected to the switch circuit 31 and the electrolytic component 20.

[0104] Optionally, the output end of the voltage comparator can also be connected to a power supply device 300 external to the switch circuit 31 and the electrolytic component 20 to adjust the voltage output by the power supply device 300 .

[0105] Please refer to FIG. 7( b ), which is an exemplary circuit schematic diagram of the main control circuit 30 in the control circuit shown in FIG. 2( b ). For ease of explanation, only the part related to the present embodiment is shown, which is described in detail as follows:

[0106] In an optional embodiment, the main control component 302 is implemented by a single-chip microcomputer MCU2, and a detection port of the single-chip microcomputer MCU2 is connected to the electrolytic component 20 for receiving the voltage fed back by the electrolytic component 20. A control port of the single-chip microcomputer MCU2 is connected to the regulating circuit 301 for detecting the voltage of the electrolytic component 20, controlling the regulating circuit 301 to stop working when a second voltage is detected, and outputting a regulating control signal to the regulating circuit 301 when a change in the second voltage is detected.

[0107] Specifically, the analog-to-digital conversion unit in the single-chip microcomputer MCU2 is used to detect the voltage change of the electrolytic component 20. The control port of the single-chip microcomputer MCU2 is connected to the power supply 100 and the power supply device 300 to adjust the voltage output by the power supply device 300.

[0108] In other optional embodiments, the main control component 302 can also be implemented by a voltage comparator. Specifically, the positive input terminal of the voltage comparator is connected to the electrolytic component 20 to receive the voltage fed back by the electrolytic component 20, the negative input terminal of the voltage comparator is connected to a reference signal, the value of the reference signal is equal to the value of the second voltage, and the output terminal of the voltage comparator is connected to the regulating circuit 301 and the electrolytic component 20.

[0109] See also Figure 8 ,for Figure 3 The exemplary circuit schematic diagram of the main control circuit 30 in the control circuit shown in the figure only shows the part related to the present embodiment for the convenience of explanation, which is described in detail as follows:

[0110] In an optional embodiment, the main control circuit 30 is implemented by a single-chip microcomputer MCU, and the detection port of the single-chip microcomputer MCU is connected to the electrolytic component 20, and is used to receive the voltage fed back by the electrolytic component 20. The control port of the single-chip microcomputer MCU is connected to the power supply 100 and the power supply device 300, and is used to control the voltage output by the power supply 100 and the voltage of the power supply device 300, thereby controlling the voltage of the connected component 10 and the voltage of the electrolytic component 20.

[0111] In this embodiment, when the single-chip microcomputer MCU determines that the electrolytic component 20 is undergoing an electrolytic reaction, the power supply 100 and the electrolytic component 20 are directly controlled to be adjusted to the same potential. At this time, the voltage of the power supply 100 and the electrolytic component 20 may be 0 V or may not be 0 V. Since the voltage at the connecting component 10 is the voltage of the power supply 100, the voltage of the connecting component 10 and the voltage of the electrolytic component 20 are the same potential, which avoids corrosion of the charging contacts of the connecting component 10 and the earphone 200, and prolongs the service life of the charging box and the wireless earphone 200.

[0112] In other optional embodiments, the main control circuit 30 can also be implemented by a voltage comparator. Specifically, the positive input terminal of the voltage comparator is connected to the electrolytic component 20 to receive the voltage fed back by the electrolytic component 20, the negative input terminal of the voltage comparator is connected to a reference signal, the value of the reference signal is equal to the value of the second voltage, and the output terminal of the voltage comparator is connected to the power supply 100 and the electrolytic component 20. Optionally, the output terminal of the voltage comparator can also be connected to the power supply 100 and the power supply device 300 connected to the electrolytic component 20 to adjust the voltage output by the power supply 100 and the power supply device 300.

[0113] See also Fig. 9, is an exemplary circuit schematic diagram of the switch circuit 31 in the control circuit shown in FIG2(a). For the sake of convenience, only the part related to the present embodiment is shown, which is described in detail as follows:

[0114] In an optional embodiment, the switch circuit 31 is implemented by a relay KT1 and a relay KT2, and the contact group of the relay KT1 and the contact group of the relay KT2 are closed or opened at the same time.

[0115] The winding of relay KT1 and the winding of relay KT2 are connected to the main control component 32, the contact group of relay KT1 is connected to the connection component 10, and the contact group of relay KT2 is connected to the electrolytic component 20. When the contact group of relay KT1 is closed, the connection component 10 is connected to the power supply 100, and when the contact group of relay KT2 is closed, the electrolytic component 20 is connected to the power supply device 300. When the contact group of relay KT1 is closed, the connection component 10 is disconnected from the power supply 100, and the contact group of relay KT2 disconnects the electrolytic component 20 from the power supply device 300.

[0116] Specifically, the contact group of relay KT1 is connected in series on the connecting line between the power supply 100 and the connecting component 10, and the contact group of relay KT2 is connected in series on the connecting line between the power supply equipment 300 and the electrolytic component 20. The connecting component 10 can be connected and disconnected accordingly through the on and off states of the contact group; when the main control component 32 powers on the windings of relay KT1 and relay KT2, the contact groups of relay KT1 and relay KT2 are closed; otherwise, the contact groups of relay KT1 and relay KT2 are disconnected.

[0117] The relay KT1 and the relay KT2 used in this embodiment are normally closed relays.

[0118] In other optional embodiments, a pair of electronic switches in other forms (such as MOS tubes, transistors, etc.) can also be used as the switching circuit 31, and the controlled end of the electronic switch is connected to the main control component 32, the input and output ends of one electronic switch are connected in series to the connecting line between the power supply 100 and the connecting component 10, and the input and output ends of the other electronic switch are connected in series to the connecting line between the current device 300 and the electrolytic component 20.

[0119] See also Fig.10 , is a specific circuit schematic diagram of a control circuit for a charging box provided in an embodiment of the present application. For the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0120] In this embodiment, when the metal contacts / spring pins a1 and a2 are connected, the electric energy of the power supply 100 is transmitted to the earphone 200, and the metal contact / spring pin a3 has a second voltage. When an electrolyte solution is present on the metal contacts / spring pins a1 and a2 or the earphone 200, an electrolysis reaction occurs between the electrolyte solution and the metal contact / spring pin a3, and the second voltage changes. The microcontroller MCU1 detects the voltage of the metal contact / spring pin a3, and when a change in the second voltage is detected, the contact groups of the control relays KT1 and KT2 are disconnected, so that the voltage of the metal contact / spring pin a1 and the voltage of the metal contact / spring pin a3 are both 0, thereby achieving equal potential.

[0121] The above control circuit, when the single-chip computer MCU1 determines that there is an electrolyte solution (such as sweat, water stains, etc.) on the metal contacts / spring pins a1 and a2 or the earphone 200, will adjust the voltage of the metal contacts / spring pins a1 and the voltage of the metal contacts / spring pins a3 to an equipotential state, thereby stopping the electrolysis reaction, avoiding corrosion of the charging contacts of the connection component 10 and the earphone 200, and extending the service life of the charging box and the wireless earphone 200.

[0122] See also Fig.11 , is a specific circuit schematic diagram of a control circuit for a charging box provided in another embodiment of the present application. For the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0123] In this embodiment, when the metal contacts / spring pins a1 and a2 are connected, the electric energy of the power supply 100 is transmitted to the earphone 200, and the metal contact / spring pin a3 has a second voltage. When there is an electrolyte solution on the metal contacts / spring pins a1 and a2 or the earphone 200, an electrolysis reaction occurs between the electrolyte solution and the metal contact / spring pin a3, and the second voltage changes. The single-chip microcomputer MCU detects the voltage of the metal contact / spring pin a3, and when a change in the second voltage is detected, the voltage of the metal contact / spring pin a1 and the voltage of the metal contact / spring pin a3 are adjusted to an equipotential state.

[0124] The above control circuit, when the single-chip computer MCU determines that there is an electrolyte solution (such as sweat, water stains, etc.) on the metal contacts / spring pins a1 and a2 or the earphone 200, will adjust the voltage of the metal contacts / spring pins a1 and the voltage of the metal contacts / spring pins a3 to an equipotential state, thereby stopping the electrolysis reaction, avoiding corrosion of the charging contacts of the connection component 10 and the earphone 200, and extending the service life of the charging box and the wireless earphone 200.

[0125] See also Fig.12 , is a specific flow chart of a control method for a charging box provided in an embodiment of the present application. For the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0126] A control method for a charging box comprises the following steps:

[0127] S01: using the connection assembly 10 to transmit the power of the power supply 100 to the earphone 200 when connected;

[0128] S02: When an electrolyte solution is present on the connection component 10 or the earphone 200 using the electrolytic component 20, an electrolytic reaction occurs between the electrolyte solution and the connection component 10, and the second voltage changes;

[0129] S03: The main control circuit 30 is used to detect the voltage of the electrolytic component 20, and when a change in the second voltage is detected, the voltage of the connecting component 10 and the voltage of the electrolytic component 20 are adjusted to an equipotential state.

[0130] The above control method, when it is determined that there is an electrolyte solution (such as sweat, water stains, etc.) on the connecting component 10 or the earphone 200, adjusts the voltage of the connecting component 10 and the voltage of the electrolytic component 20 to an equipotential state, thereby stopping the electrolysis reaction, avoiding corrosion of the charging contacts of the connecting component 10 and the earphone 200, and extending the service life of the charging box and the wireless earphone 200.

[0131] In summary, the present application provides a control circuit and method. When it is determined that there is an electrolyte solution (such as sweat, water stains, etc.) on the connecting component 10 or the earphone 200, the voltage of the connecting component 10 and the voltage of the electrolytic component 20 are adjusted to an equipotential state, thereby stopping the electrolysis reaction and avoiding corrosion of the charging contacts of the connecting component 10 and the earphone 200, thereby extending the service life of the charging box and the wireless earphone 200.

[0132] In summary, the present invention provides a control circuit and method for a charging box, which monitors whether an electrolytic reaction occurs between a connecting component and an electrolytic component during charging of the earphone using the charging box through the cooperation of an electrolytic component and a main control circuit. When the main control circuit detects a change in the second voltage, it determines whether an electrolyte solution (such as sweat, water stains, etc.) is present on the connecting component or the earphone, and whether an electrolytic reaction occurs between the connecting component and the electrolytic component. At this time, the voltage of the connecting component and the voltage of the electrolytic component are adjusted to an equipotential state, thereby stopping the electrolytic reaction and avoiding corrosion of the charging contacts of the connecting component and the earphone, thereby extending the service life of the charging box and the wireless earphone, and ensuring that charging is performed only when there is no electrolyte solution on the connecting component or the earphone, thereby ensuring a high energy utilization rate.

[0133] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A control circuit for a charging box, the charging box comprising a power supply for supplying power to a connected headset, the power supply having a first voltage, characterized in that: The control circuit comprises: A connecting component, connected to the power supply and the earphone, and used for transmitting the power of the power supply to the earphone when connected to the power supply; an electrolytic component connected to a power supply device, the power supply device providing a second voltage, for indicating a change in the second voltage by an electrolytic reaction between the electrolyte solution and the connecting component when an electrolyte solution is present on the connecting component or the earphone, wherein the electrolytic component is implemented by a metal contact sheet or a spring pin; and The main control circuit is connected to the electrolytic component and the power supply, and is used to control the connection component and the electrolytic component to be at the same potential when detecting a change in the second voltage. The main control circuit includes a main control chip.

2. The control circuit according to claim 1, characterized in that: The main control circuit comprises: a switch circuit connected to the connection assembly and the electrolytic assembly, for connecting the connection assembly to the power source and the electrolytic assembly to the power supply device when closed, and disconnecting the connection assembly from the power source and the electrolytic assembly from the power supply device when closed; and The main control component is connected to the electrolytic component and the switch circuit, and is used to detect the voltage of the electrolytic component, control the switch circuit to close when the second voltage is detected, and control the switch circuit to close when a change in the second voltage is detected.

3. The control circuit according to claim 1, characterized in that: The main control circuit comprises: a regulating circuit connected to the power supply and the power supply device, and configured to adjust the power supply and the power supply device to an equal potential upon receiving a regulating control signal; and A main control component is connected to the electrolytic component and the regulating circuit, and is used to detect the voltage of the electrolytic component, control the regulating circuit to stop working when the second voltage is detected, and output the regulating control signal to the regulating circuit when a change in the second voltage is detected.

4. The control circuit according to claim 1, characterized in that: The connecting component is implemented by two metal contacts or two spring pins; one of the metal contacts / the spring pins is connected to the positive pole of the power supply, and the other metal contact / the spring pin is connected to the negative pole of the power supply; the electrolytic component is arranged in the area between the two metal contacts / the two spring pins.

5. The control circuit according to claim 2, characterized in that: The switch circuit is implemented by two relays, the windings of the two relays are connected to the main control component, the contact group of one of the relays is connected to the connection component, and the contact group of the other relay is connected to the electrolytic component.

6. The control circuit according to claim 1, characterized in that: Also includes: An alarm circuit, connected to the main control circuit, for giving an alarm when receiving an alarm control signal; The main control circuit is further configured to output the alarm control signal to the alarm circuit when detecting a change in the second voltage.

7. A control method based on a control circuit for a charging box according to any one of claims 1 to 6, wherein the charging box comprises a power supply for powering a connected headset, the power supply having a first voltage, characterized in that: The control method comprises: Using a connection component to transmit power from the power source to the earphone when connected; When an electrolyte solution is present on the connection component or the earphone, an electrolytic reaction occurs between the electrolyte solution and the connection component, indicating that the second voltage changes; The main control circuit is used to detect the voltage of the electrolytic component, and when a change in the second voltage is detected, the connecting component and the electrolytic component are adjusted to an equipotential state.

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