CN111799855A

CN111799855A - Control circuit and method for charging box

Info

Publication number: CN111799855A
Application number: CN202010477524.5A
Authority: CN
Inventors: 汪波波; 李太伟; 王丽
Original assignee: Shenzhen Horn Audio Co Ltd
Current assignee: Shenzhen Horn Audio Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-10-20

Abstract

A control circuit and a method for a charging box are provided, wherein the control circuit comprises a connecting component, an electrolysis component and a main control circuit. When connecting subassembly intercommunication with the electric energy transmission of power to earphone, the electrolysis subassembly has the second voltage, when having electrolyte solution on connecting subassembly or earphone, takes place electrolytic reaction through electrolyte solution and electrolysis subassembly, and the second voltage changes, and master control circuit detects the voltage of electrolysis subassembly, and voltage adjustment with connecting subassembly's voltage and electrolysis subassembly is the equipotential state when detecting that the second voltage changes. According to the control circuit and the control method, when the connection assembly or the earphone is judged to have electrolyte solution (such as sweat, water stain and the like), the voltage of the connection assembly and the voltage of the electrolysis assembly are adjusted to be in an equipotential state, so that the electrolysis reaction is stopped, the connection assembly and the charging contact of the earphone are prevented from being corroded, and the service lives of the charging box and the wireless earphone are prolonged.

Description

Control circuit and method for charging box

Technical Field

The application belongs to the technical field of charging boxes, and particularly relates to a control circuit and a control method for a charging box.

Background

In recent years, the number of users of wireless earphones has increased dramatically, and wireless earphones are small in size and cannot be equipped with a large-capacity battery inside the earphone body, so that the wireless earphones are often used with a charging box. The charging box is provided with an exposed power supply contact and is used for being connected with the exposed charging contact of the wireless earphone, so that charging is realized. However, because the power supply contact and the charging contact are exposed, electrolyte solutions such as sweat or water stain are easily adhered to the power supply contact and the charging contact, so that an electrolytic reaction is easily generated in the charging process, the electric energy utilization rate is reduced, the power supply contact and the charging contact are quickly corroded, the aging process of the charging box and the wireless earphone is aggravated, and the service lives of the charging box and the wireless earphone are shortened.

Therefore, in the conventional power supply technical scheme of the charging box, the problems that the electric energy utilization rate is reduced and the service lives of the charging box and the wireless earphone are shortened due to the fact that the wireless earphone is easy to generate electrolytic reaction in the charging process by using the charging box are solved.

Disclosure of Invention

The application aims to provide a control circuit and a control method for a charging box, and aims to solve the problems that in the traditional charging box power supply technical scheme, because the wireless earphone is easy to generate electrolytic reaction in the charging process by using the charging box, the electric energy utilization rate is reduced, and the service lives of the charging box and the wireless earphone are shortened.

A first aspect of embodiments of the present application provides a control circuit for a charging box, the charging box comprising a power supply for supplying power to an accessed headset, the power supply having a first voltage, the control circuit comprising:

the connecting assembly is connected with the power supply and the earphone and is used for transmitting the electric energy of the power supply to the earphone when being communicated with the power supply;

an electrolytic component connected with a power supply device, wherein the power supply device provides a second voltage, and the electrolytic component is used for carrying out electrolytic reaction with the connecting component through an electrolyte solution when the electrolyte solution exists on the connecting component or the earphone so as to indicate that the second voltage changes; and

and the main control circuit is connected with the electrolytic component and the power supply and is used for controlling the connecting component and the electrolytic component to be at the same potential when detecting that the second voltage changes.

Optionally, the main control circuit includes:

the switching circuit is connected with the connecting assembly and the electrolytic assembly and is used for connecting the connecting assembly with the power supply and connecting the electrolytic assembly with the power supply equipment when the switching circuit is closed, disconnecting the connecting assembly from the power supply and disconnecting the electrolytic assembly from the power supply equipment when the switching circuit is switched off; and

and the main control assembly is connected with the electrolysis assembly and the switch circuit and is used for detecting the voltage of the electrolysis assembly, controlling the switch circuit to be closed when the second voltage is detected, and controlling the switch circuit to be switched off when the second voltage is detected to be changed.

Above-mentioned master control circuit, be connected with coupling assembling and electrolysis subassembly through switch circuit, the master control subassembly judges that the electrolysis subassembly is taking place the electrolytic reaction time, control switch circuit disconnection, thereby the unable output electric energy of power to coupling assembling, the voltage of coupling assembling department returns to zero, and simultaneously, the voltage of electrolysis subassembly is set to zero, therefore, when electrolyte solution (like sweat, water stain etc.) has on coupling assembling or the earphone, the voltage of coupling assembling and the voltage adjustment of electrolysis subassembly are 0V's equipotential state, avoid corroding the charging contact of coupling assembling and earphone, the life of extension charging box and wireless earphone.

Optionally, the main control circuit includes:

the adjusting circuit is connected with the power supply and the power supply equipment and is used for adjusting the power supply and the power supply equipment to be at equal potential when receiving an adjusting control signal; and

and the main control assembly is connected with the electrolysis assembly and the regulating circuit and is used for detecting the voltage of the electrolysis assembly, controlling the regulating circuit to stop working when the second voltage is detected, and outputting the regulating control signal to the regulating circuit when the second voltage is detected to be changed.

Above-mentioned master control circuit, when judging that electrolysis subassembly is taking place the electrolytic reaction, the voltage of direct control adjustment power and the voltage of electrolysis subassembly for power and power supply unit equipotential, because the voltage of coupling assembling department is the voltage of power, the voltage of electrolysis subassembly department is the voltage of power supply unit promptly, consequently, coupling assembling's voltage and electrolysis subassembly equipotential avoid corroding the charging contact of coupling assembling and earphone, prolong the life of charging box and wireless earphone. In this embodiment, after being adjusted to be equal in potential, the voltage of the power supply 100 and the power supply device may be 0V or may not be 0V.

Optionally, the connecting assembly is implemented by using two metal contact pieces or two spring ejector pins; one of the metal contact pieces/the spring thimble is connected with the anode of the power supply, and the other metal contact piece/the spring thimble is connected with the cathode of the power supply; the electrolysis assembly is arranged in the area between the two metal contact pieces/the two spring ejector pins.

Adopt two metal contact or two spring thimbles as coupling assembling, realize stablizing transmitting electricity, can charge to the earphone of inserting with high efficiency. The electrolysis subassembly sets up between two metal contact or two spring thimbles, and when there was electrolyte solution in the region between metal contact/spring thimble and the electrolysis subassembly, the voltage of electrolysis subassembly changed to feed back this change to master control circuit, thereby stop the electrolysis reaction, avoid corroding the charging contact of coupling assembling and earphone, the life of extension charging box and wireless earphone.

Optionally, the method further includes:

the alarm circuit is connected with the main control circuit and used for giving an alarm when receiving an alarm control signal;

and the main control circuit is also used for outputting the alarm control signal to the alarm circuit when detecting that the second voltage changes.

Above-mentioned warning circuit can in time remind the user to clean earphone and the box inside that charges to electrolyte solution such as sweat, water stain are detached, improve user experience degree.

A second aspect of the embodiments of the present application provides a control method based on the above control circuit for a charging box, the charging box including a power supply for supplying power to an accessed earphone, the power supply having a first voltage, the control method including:

when the earphone is connected, the connecting component is adopted to transmit the electric energy of the power supply to the earphone;

when an electrolyte solution exists on the connecting component or the earphone, an electrolytic component is adopted, and the electrolyte solution and the connecting component perform electrolytic reaction to indicate that the second voltage changes;

and detecting the voltage of the electrolytic assembly by adopting a main control circuit, and adjusting the connecting assembly and the electrolytic assembly to be in an equipotential state when detecting that the second voltage changes.

Compared with the prior art, the embodiment of the invention has the following beneficial effects: the utility model provides a foretell a control circuit and method for box charges, through electrolysis subassembly and main control circuit cooperation, the monitoring earphone is using the box that charges to charge the in-process, whether connecting assembly and electrolysis subassembly take place the electrolytic reaction, when main control circuit detects that the second voltage changes, judge that it has electrolyte solution (like sweat, water stain etc.) on connecting assembly or the earphone, whether connecting assembly and electrolysis subassembly take place the electrolytic reaction, adjust the voltage of connecting assembly and electrolysis subassembly to the equipotential state this moment, thereby stop the electrolytic reaction, avoid corroding the contact that charges of connecting assembly and earphone, the life of extension box and wireless earphone charges, and just charge when guaranteeing that there is not electrolyte solution on connecting assembly or the earphone, higher electric energy utilization ratio has been guaranteed.

Drawings

Fig. 1 is a schematic block diagram of a control circuit for a charging box according to an embodiment of the present disclosure;

fig. 2(a) is a schematic block diagram of a control circuit for a charging box according to another embodiment of the present application;

fig. 2(b) is a schematic block diagram of a control circuit for a charging box according to another embodiment of the present disclosure

Fig. 3 is a schematic block diagram of a control circuit for a charging box according to another embodiment of the present disclosure;

FIG. 4 is an exemplary block diagram of a connection assembly in the control circuit shown in FIGS. 1, 2 or 3;

FIG. 5 is a schematic diagram of an exemplary electrolytic assembly of the control circuit shown in FIGS. 1, 2 or 3;

fig. 6 is an exemplary schematic diagram of a control circuit for a charging box according to the combination of the solutions of fig. 4 and 5;

FIG. 7(a) is an exemplary circuit schematic of a master control assembly in the control circuit shown in FIG. 2 (a);

FIG. 7(b) is an exemplary circuit schematic of the master control assembly in the control circuit shown in FIG. 2 (b);

FIG. 8 is an exemplary circuit schematic of the master control circuit in the control circuit shown in FIG. 3;

FIG. 9 is an exemplary circuit schematic of a switching circuit in the control circuit shown in FIG. 2 (a);

fig. 10 is a schematic circuit diagram illustrating a control circuit for a charging box according to an embodiment of the present disclosure;

fig. 11 is a schematic circuit diagram illustrating a control circuit for a charging box according to another embodiment of the present disclosure;

fig. 12 is a specific flowchart of a control method for a charging box according to an embodiment of the present application.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, a schematic block diagram of a control circuit for a charging box according to an embodiment of the present disclosure is shown, for convenience of description, only the relevant portions of the charging box are shown, and the detailed description is as follows:

a control circuit for a charging box comprising a power supply 100 for powering an attached headset 200, the power supply 100 having a first voltage.

The control circuit comprises a connecting component 10, an electrolysis component 20 and a main control circuit 30.

Wherein, the connecting component 10 is connected with 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 connecting component 10 through an electrolyte solution; the main control circuit 30 is connected to the electrolysis module 20 and the power supply 100, and is also connected to the connection module 10 or the power supply 100. The electrolytic module 20 is connected to the power supply apparatus 300, and the power supply apparatus 300 supplies a second voltage.

The connecting assembly 10 is used to transmit power from the power source 100 to the headset 200 when communicating with the power source 100.

The electrolyte assembly 20 has a second voltage, and the electrolyte assembly 20 is configured to electrolytically react with the connection assembly 10 through the electrolyte solution when the electrolyte solution is present on the connection assembly 10 or the earphone 200 to indicate that the second voltage has changed.

In particular, the first voltage and the second voltage have a non-zero voltage difference. The electrolyte solution is sweat, rainwater, beverage, etc., and the earphone 200 is easily stained with the electrolyte solution during the use and when the charging case is improperly stored.

The main control circuit 30 is used for detecting the voltage of the electrolytic assembly 20, and adjusting the voltage of the connecting assembly 10 and the voltage of the electrolytic assembly 20 to be in an equipotential state when detecting that the second voltage changes.

Specifically, when main control circuit 30 connects power 100, the voltage of accessible direct adjustment power 100 to the voltage of adjustment electrolysis subassembly 20, because coupling assembling 10 itself does not have the voltage, only is used for as the conductor of transmission electric energy, and when coupling assembling 10 communicated, the voltage of power 100 was exactly the voltage of coupling assembling 10, consequently, through the voltage of direct adjustment power 100 and the voltage of adjustment electrolysis subassembly 20, make the two unanimous, can make coupling assembling 10 the voltage with the voltage of electrolysis subassembly 20 is the equipotential state.

In particular, the main control circuit 30 may be connected to the connection assembly 10. In addition, the main control circuit 30 can be connected to the power source 100 and the connecting component 10 at the same time.

In an optional embodiment, the control circuit further includes an alarm circuit.

The alarm circuit is connected with the main control circuit 30.

The alarm circuit is used for alarming when receiving the alarm control signal. The main control circuit 30 is further configured to output an alarm control signal to the alarm circuit when detecting that the second voltage changes.

Specifically, the alarm circuit can be realized by a buzzer, and alarms through sound; in addition, the alarm circuit can be realized by adopting a warning lamp, and the warning lamp can be realized by adopting a light emitting diode; in addition, the alarm circuit can also be realized by the combination of a buzzer and a warning lamp.

Above-mentioned warning circuit can in time remind the user to clean earphone 200 and the box inside that charges to electrolyte solution such as sweat, water stain are detached, improve user experience degree.

Optionally, the control circuit provided by the present application is built in and in the charging box.

Referring to fig. 2(a), a schematic block diagram of a control circuit for a charging box according to another embodiment of the present application is shown, wherein for convenience of description, only the relevant portions of the present embodiment are shown, and the following details are described below:

in an alternative embodiment, the main control circuit 30 includes a switch circuit 31 and a main control component 32.

The switch circuit is connected with the connecting assembly and the electrolysis assembly and is used for communicating the connecting assembly with the power supply and communicating the electrolysis assembly with the power supply equipment when the switch circuit is closed, disconnecting the connecting assembly from the power supply and disconnecting the electrolysis assembly from the power supply equipment when the switch circuit is switched off; and

and the main control assembly is connected with the electrolysis assembly and the switch circuit and is used for detecting the voltage of the electrolysis assembly, controlling the switch circuit to be closed when detecting a second voltage and controlling the switch circuit to be switched off when detecting that the second voltage changes.

The switch circuit 31 is connected to the connecting assembly 10 and the electrolytic assembly 20, and the main control assembly 32 is connected to the electrolytic assembly 20 and the switch circuit 31.

The switching circuit 31 connects the connection assembly 10 to the power supply 100 and the electrolysis assembly 20 to the power supply apparatus 300, and disconnects the connection assembly 10 from the power supply 100 and the electrolysis assembly 20 from the power supply apparatus 300 when turned off.

Specifically, the switch circuit 31 is connected in series to the connection line between the power supply 100 and the connecting assembly 10 and connected in series to the connection line between the power supply device 300 and the electrolytic assembly 20, and the connecting assembly 10 and the electrolytic assembly 20 can be connected and disconnected by the on-off state of the switch circuit 31.

The main control assembly 32 is used for detecting the voltage of the electrolysis assembly 20, controlling the switch circuit 31 to be closed when the second voltage is detected to be changed, and controlling the voltage of the electrolysis assembly 20 to be set to zero.

Specifically, when the second voltage is detected to be changed, which indicates that the electrolytic component 20 has a voltage change due to an electrolytic reaction, the main control component 32 controls the switch circuit 31 to turn off, so that the connection component 10 is turned off, and thus the electric energy transmitted by the power supply 100 cannot be received, and controls the switch circuit 31 to turn off, so that the electrolytic component 20 is turned off, and thus the electric energy transmitted by the power supply device 300 cannot be received; the charging process of the headset 200 is interrupted and the voltage of the connecting assembly 10 and the electrolytic assembly 20 is zeroed. Therefore, the voltage of the electrolytic assembly 20 and the voltage of the connecting assembly 10 are both 0V, and both are equal in potential.

The switch circuit 31 defaults to a closed state, and when the main control component 32 detects that the second voltage changes, the switch circuit 31 is controlled to be switched from the default closed state to an off state.

As shown in fig. 2(a), optionally, the control circuit provided in this embodiment may further include a timing wake-up circuit, the timing wake-up circuit is connected to the switch circuit 31, when the main control component 32 detects that the second voltage changes, the control switch circuit 31 is turned off, so as to trigger the timing wake-up circuit to operate, the timing wake-up circuit is configured to control the switch circuit 31 to be turned on every preset time interval, so that the power supply 100 recharges the connected earphone 200, and the electrolytic component 20 is communicated with the power supply device 300 to obtain the second voltage, and if there are still electrolyte solutions such as sweat and water stain, the main control component 32 turns off the switch circuit 31 again. Through newly-increased timing awakening circuit, when the user does not in time clean electrolyte solution, the charging process can be regularly resumed to the accessible timing awakening circuit, after electrolyte solution volatilizes by oneself, can charge automatically smoothly, avoids the main control assembly 32 to turn off behind the switch circuit 31, and the user does not manually resume the charging process for a long time.

The main control circuit 30 is connected to the connection assembly 10 through the switch circuit 31, and the main control assembly 32 determines that the electrolytic assembly 20 is undergoing an electrolytic reaction, and controls the switch circuit 31 to be disconnected, so that the power supply 100 cannot output electric energy to the connection assembly 10, and the voltage at the connection assembly 10 and the voltage of the electrolytic assembly 20 return to zero, therefore, when the connection assembly 10 or the earphone 200 has an electrolyte solution (such as sweat, water stain, etc.), the voltage of the connection assembly 10 and the voltage of the electrolytic assembly 20 are adjusted to be in an equipotential state of 0V, thereby avoiding corrosion of the charging contacts of the connection assembly 10 and the earphone 200, and prolonging the service life of the charging box and the wireless earphone 200.

Referring to fig. 2(b), a schematic structural diagram of a module of a control circuit for a charging box according to another embodiment of the present application is shown, and for convenience of description, only the parts related to this embodiment are shown, which is detailed as follows:

in an alternative embodiment, the master control circuit 30 includes a regulating circuit 301 and a master control element 302.

The adjusting circuit 301 is connected to the power source 100 and the power supply device 300, and the main control module 302 is connected to the electrolysis module 20 and the adjusting circuit 301.

The adjusting circuit 301 is configured to adjust the power source 100 and the power supply apparatus 300 to be at the same potential when receiving the adjusting control signal.

The main control assembly 302 is used for detecting the voltage of the electrolysis assembly 20, controlling the regulating circuit 301 to stop working when detecting the second voltage, and outputting a regulating control signal to the regulating circuit 301 when detecting that the second voltage changes.

Specifically, when detecting that the second voltage changes, the main control component 302 drives the adjusting circuit 301 to adjust the power supply 100 and the power supply device 300 to a third voltage, where the third voltage may be 0V or may not be 0V. The voltage of the power source 100 is the voltage of the connecting assembly 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 be continuously charged, and at this time, the voltage output by the power supply 100 is the third voltage, and since the voltage of the electrolytic component 20 is also the third voltage and has the same potential as the connecting component 10, even if the earphone 200 is continuously charged, the electrolytic reaction does not occur any more, and the charging process of the earphone 200 is not interrupted.

As shown in fig. 2(b), optionally, the control circuit 30 provided in this embodiment may further include a timing wake-up circuit, the timing wake-up circuit is connected to the power supply 100 and the power supply device 300, when the main control circuit 30 detects that the second voltage changes, the power supply 100 and the power supply device 300 are adjusted to be at an equal potential, so as to trigger the timing wake-up circuit to operate, the timing wake-up circuit is configured to control the power supply 100 to adjust from the third voltage back to the first voltage and adjust the electrolytic component 20 from the third voltage back to the second voltage every preset time interval, and if there are electrolyte solutions such as sweat and water stain still existing at this time, the main control circuit 30 adjusts the power supply 100 and the electrolytic component 20 to be at an equal potential again. Through newly adding the timing awakening circuit, when the user does not clean the electrolyte solution in time, the charging process can be regularly recovered through the timing awakening circuit, after the electrolyte solution volatilizes by itself, the charging can be smoothly and automatically carried out, and the situation that the user does not manually recover the charging process for a long time after the main control circuit 30 turns off the switch circuit 31 is avoided.

The main control circuit 30 determines that the electrolysis component 20 is undergoing an electrolysis reaction, and directly controls and adjusts the voltage of the power supply 100 and the voltage of the electrolysis component 20 to be the third voltage, and since the voltage at the connection component 10 is the voltage of the power supply 100, the voltage of the connection component 10 and the voltage of the electrolysis component 20 are equipotential, so as to avoid corroding the charging contacts of the connection component 10 and the earphone 200, and prolong the service life of the charging box and the wireless earphone 200.

Referring to fig. 3, a schematic block diagram of a control circuit for a charging box according to another embodiment of the present disclosure is shown, for convenience of description, only the relevant portions of the present embodiment are shown, and the following details are described below:

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 300, and directly controls and adjusts the voltage of the power supply 100 and the voltage of the power supply 300.

When detecting that the second voltage changes, the main control chip MCU adjusts the voltage of the power supply 100 and the voltage of the electrolytic component 20 to be equal potentials, and specifically adjusts the voltages to be a third voltage.

Specifically, the third voltage may be 0V or may not be 0V; the voltage of the power source 100 is the voltage of the connecting assembly 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, the voltage output by the power supply 100 is the third voltage, and the voltage of the electrolysis component 20 is also the third voltage, so that the electrolysis reaction can not occur any more even if the earphone 200 continues to be charged, and the charging process of the earphone 200 can not be interrupted.

As to fig. 3, optionally, the control circuit provided in this embodiment may further include a timing wake-up circuit, the timing wake-up circuit is connected to the power supply 100 and the electrolytic component 20, when the main control chip MCU detects that the second voltage changes, the power supply 100 and the power supply 300 are adjusted to be at an equal potential, so as to trigger the timing wake-up circuit to operate, the timing wake-up circuit is configured to control the power supply 100 to adjust from the third voltage to the first voltage and adjust the electrolytic component 20 from the fourth voltage to the second voltage every preset time interval, and if there are electrolyte solutions such as sweat and water stain, the main control chip MCU adjusts the power supply 100 and the electrolytic component 20 to be at an equal potential state again. Through newly-increased timing awakening circuit, when the user does not in time clean electrolyte solution, the charging process is regularly resumeed to the accessible timing awakening circuit, volatilizes the back when electrolyte solution by oneself, can charge automatically smoothly, avoids main control chip MCU to turn off behind the switch circuit 31, and the user does not manually resume the charging process for a long time.

Above-mentioned main control chip MCU, it is when electrolytic reaction takes place for electrolytic component 20 to judge, the voltage of direct control adjustment power 100 and the voltage adjustment of electrolytic component 20 are the equipotential, because the voltage of coupling assembling 10 department is the voltage of power 100, consequently, the voltage of coupling assembling 10 and the voltage equipotential of electrolytic component 20 avoid corroding the charging contact of coupling assembling 10 and earphone 200, prolong the life of charging box and wireless earphone 200.

Please refer to fig. 4, which is a schematic diagram of an exemplary structure of the connecting component 10 in the control circuit shown in fig. 1, 2 or 3, wherein for convenience of description, only the portions related to the present embodiment are shown, and the detailed description is as follows:

in an alternative embodiment, the connecting assembly 10 is implemented by two metal contacts or two pogo pins a1 and a 2.

Wherein the metal contact/spring thimble a1 is connected with the positive pole of the power supply 100, and the metal contact/spring thimble a2 is connected with the negative pole of the power supply 100; the electrolytic assembly 20 is disposed in the area between the two metal contacts/pogo pins a1 and a 2.

Specifically, the electrolytic assembly 20 is not in direct contact with the two metal contacts/two pogo pins a1 and a2 in the connecting assembly 10, and when an electrolyte solution is present in the region between the electrolytic assembly 20 and the metal contacts/pogo pins a1 and a2, the electrolyte solution serves as a passage for communicating the electrolytic assembly 20 with the metal contacts/pogo pins a1 and a2, and an electrolytic reaction occurs, so that the voltage of the electrolytic assembly 20 changes.

The pogo pin, also called pogo pin, pogo pin or pogo pin connector, is formed by riveting three basic parts of a pin head and a needle tube and a spring by precision instruments. The bottom of the needle head of the spring thimble is usually of an inclined plane structure, the inclined plane structure can ensure that the needle head is kept in contact with the inner wall of the needle tube when the spring thimble works, current passes through the gold-plated needle head and the needle tube, and the stability and the low impedance characteristic of the spring thimble are ensured. Because the spring thimble is a very meticulous probe, the volume can be accomplished very little, saves space, beautifies the product outward appearance.

Two metal contact pieces or two spring thimble a1 and a2 are used as the connecting component 10, so that stable power transmission is realized, and the connected earphone 200 can be charged efficiently. The electrolytic component 20 is disposed between two metal contacts or two pogo pins, when the electrolyte solution exists in the region between the metal contacts/pogo pins a1 and a2 and the electrolytic component 20, the voltage of the electrolytic component 20 changes and feeds back the change to the main control circuit 30, thereby stopping the electrolytic reaction, avoiding corrosion of the charging contacts of the connecting component 10 and the earphone 200, and prolonging the service life of the charging box and the wireless earphone 200.

Referring to fig. 5, which is a schematic diagram of an exemplary structure of the electrolytic component 20 in the control circuit shown in fig. 1, 2 or 3, for convenience of illustration, only the parts related to the embodiment are shown, and the detailed description is as follows:

in an alternative embodiment, the electrolytic assembly 20 described above is implemented using metal contact or pogo pins a 3.

Specifically, the second voltage provided by the metal contact/pogo pin a3 is provided by the external power supply 300, and the power supply 300 is not the power supply 100.

Referring to fig. 6, an exemplary schematic diagram of a control circuit for a charging box after combining the technical solutions of fig. 4 and fig. 5 is shown, for convenience of description, only the parts related to the present embodiment are shown, and the following details are described as follows:

in an alternative embodiment, the connecting assembly 10 is implemented by two metal contact pieces or two pogo pins, and the electrolytic assembly 20 is implemented by metal contact pieces or pogo pins.

The metal contact/spring thimble a1 is connected with the positive pole of the power supply 100, and the other metal contact/spring thimble a2 is connected with the negative pole of the power supply 100; metal contact/pogo pin a3 is disposed in the area between metal contact/pogo pin a1 and metal contact/pogo pin a 2.

Further, in practice, the connecting assembly 10 is implemented using a pair of metal contacts a1 and a2, and the electrolytic assembly 20 is implemented using metal contact a3 to ensure consistency.

Further, in practical operation, the connection assembly 10 is implemented by using a pair of pogo pins a1 and a2, and the electrolysis assembly 20 is implemented by using pogo pins a3, so as to ensure consistency.

Referring to fig. 7(a), a schematic circuit diagram of an example of the main control component 32 in the control circuit shown in fig. 2(a) is shown, and for convenience of description, only the parts related to the embodiment are shown, and detailed as follows:

in an optional embodiment, the main control module 32 is implemented by a single-chip microcomputer MCU1, and a detection port of the single-chip microcomputer MCU1 is connected to the electrolysis module 20 and configured to receive a voltage fed back by the electrolysis module 20. One control port of the single-chip microcomputer MCU1 is connected with the switch circuit 31 and used for controlling the switch circuit 31 to be closed or turned off, and the other control port of the single-chip microcomputer MCU1 is connected with the electrolysis component 20 to control the voltage of the electrolysis component 20.

Specifically, the voltage change of the electrolytic component 20 is detected by an analog-to-digital conversion unit inside the single chip microcomputer MCU 1. Optionally, the control port of the MCU1 may further be connected to the power supply 100 and the power supply 300 externally connected to the electrolysis assembly 20, so as to adjust the voltage output by the power supply 300.

In other alternative embodiments, the main control component 32 may also be implemented by a voltage comparator. Specifically, the non-inverting input terminal of the voltage comparator is connected to the electrolytic component 20 and is configured to receive the voltage fed back by the electrolytic component 20, the inverting 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 switching circuit 31 and the electrolytic component 20.

Optionally, the output end of the voltage comparator may further be connected to the switching circuit 31 and the power supply device 300 externally connected to the electrolysis assembly 20, so as to adjust the voltage output by the power supply device 300.

Referring to fig. 7(b), a schematic circuit diagram of an example of the main control circuit 30 in the control circuit shown in fig. 2(b) is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed as follows:

in an optional embodiment, the main control module 302 is implemented by a single-chip microcomputer MCU2, and a detection port of the single-chip microcomputer MCU2 is connected to the electrolysis module 20 and configured to receive a voltage fed back by the electrolysis module 20. One control port of the single chip microcomputer MCU2 is connected with the regulating circuit 301 and is used for detecting the voltage of the electrolytic component 20, controlling the regulating circuit 301 to stop working when detecting the second voltage, and outputting a regulating control signal to the regulating circuit 301 when detecting that the second voltage changes.

Specifically, the voltage change of the electrolytic component 20 is detected by an analog-to-digital conversion unit inside the single chip microcomputer MCU 2. The control port of the MCU2 is connected to the power supply 100 and the power supply 300 to adjust the voltage output by the power supply 300.

In other alternative embodiments, the above-mentioned main control component 302 can also be implemented by using a voltage comparator. Specifically, a positive phase input end of the voltage comparator is connected to the electrolytic component 20 and is configured to receive the voltage fed back by the electrolytic component 20, a negative phase input end of the voltage comparator is connected to a reference signal, a value of the reference signal is equal to a value of the second voltage, and an output end of the voltage comparator is connected to the regulating circuit 301 and the electrolytic component 20.

Fig. 8 is a schematic circuit diagram of an exemplary main control circuit 30 in the control circuit shown in fig. 3, which only shows the relevant parts of the present embodiment for convenience of description, and the following details are described below:

in an optional embodiment, the main control circuit 30 is implemented by a single-chip microcomputer MCU, and a detection port of the single-chip microcomputer MCU is connected to the electrolysis assembly 20 and configured to receive a voltage fed back by the electrolysis assembly 20. The control port of the MCU is connected to the power supply 100 and the power supply 300, and is used to control the voltage output by the power supply 100 and the voltage of the power supply 300, so as to control the voltage of the connecting assembly 10 and the voltage of the electrolysis assembly 20.

In this embodiment, when the single chip microcomputer MCU determines that the electrolysis assembly 20 is undergoing an electrolysis reaction, the single chip microcomputer MCU directly controls the adjustment power supply 100 and the electrolysis assembly 20 to adjust to the same potential, and at this time, the voltage of the power supply 100 and the electrolysis assembly 20 may or may not be 0V. Because 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 in potential, so that the charging contacts of the connecting component 10 and the earphone 200 are prevented from being corroded, and the service lives of the charging box and the wireless earphone 200 are prolonged.

In other alternative embodiments, the main control circuit 30 may also be implemented by using a voltage comparator. Specifically, a positive phase input end of the voltage comparator is connected to the electrolytic component 20 and is configured to receive the voltage fed back by the electrolytic component 20, a negative phase input end of the voltage comparator is connected to a reference signal, a value of the reference signal is equal to a value of the second voltage, and an output end of the voltage comparator is connected to the power supply 100 and the electrolytic component 20. Optionally, the output end of the voltage comparator may further be connected to the power supply 100 and the power supply 300 externally connected to the electrolysis assembly 20, so as to adjust the voltages output by the power supply 100 and the power supply 300.

Referring to fig. 9, which is a schematic circuit diagram of an example of the switch circuit 31 in the control circuit shown in fig. 2(a), for convenience of description, only the parts related to the present embodiment are shown, and the details are as follows:

in an alternative embodiment, the above-mentioned switching circuit 31 is implemented by using 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.

The main control assembly 32 is connected with the winding of relay KT1 and the winding of relay KT2, coupling assembling 10 is connected to the contact group of relay KT1, electrolysis unit 20 is connected to the contact group of relay KT2, intercommunication coupling assembling 10 and power 100 when the contact group of relay KT1 is closed, intercommunication electrolysis unit 20 and power supply unit 300 when the contact group of relay KT2 is closed, disconnection coupling assembling 10 and power 100 when the contact group of relay KT1 is turned off, the disconnection electrolysis unit 20 of the contact group of relay KT2 and power supply unit 300.

Specifically, a contact group of the relay KT1 is connected in series with a connecting line between the power supply 100 and the connecting assembly 10, a contact group of the relay KT2 is connected in series with a connecting line between the power supply equipment 300 and the electrolytic assembly 20, and the connecting assembly 10 can be correspondingly connected and disconnected through the on-off state of the contact groups; when the main control component 32 powers on the winding of the relay KT1 and the winding of the relay KT2, the contact groups of the relay KT1 and the relay KT2 are closed; otherwise, the contact sets of the relay KT1 and the relay KT2 are opened.

The relay KT1 and the relay KT2 adopted in the present embodiment are normally closed relays.

In other alternative embodiments, a pair of electronic switches (such as mos transistor, triode, etc.) with controlled terminals connected to the main control module 32 may be used as the switching circuit 31, wherein the input terminal and the output terminal of one electronic switch are connected in series to the connection line between the power supply 100 and the connection module 10, and the input terminal and the output terminal of the other electronic switch are connected in series to the connection line between the common year device 300 and the electrolysis module 20.

Referring to fig. 10, a specific circuit schematic diagram of a control circuit for a charging box according to an embodiment of the present application is shown, for convenience of description, only the relevant portions of the control circuit for the charging box are shown, and the detailed description is as follows:

in this embodiment, when the metal contact/pogo pin a1 and the a2 are connected, the electric energy of the power supply 100 is transmitted to the earphone 200, the metal contact/pogo pin a3 has a second voltage, when electrolyte solution exists on the metal contact/pogo pin a1 and a2 or on the earphone 200, the electrolyte solution and the metal contact/pogo pin a3 are subjected to electrolytic reaction, the second voltage changes, the single-chip microcomputer 1 detects the voltage of the metal contact/pogo pin a3, and when the second voltage changes, the contact sets of the relay KT1 and the relay KT2 are controlled to be disconnected, so that the voltage of the metal contact/pogo pin a1 and the voltage of the metal contact/pogo pin a3 are both 0, and the same potential is realized.

When the single-chip microcomputer MCU1 judges that the metal contact/spring thimble a1 and the metal contact/spring thimble a2 or the earphone 200 has electrolyte solution (such as sweat, water stain and the like), the control circuit adjusts the voltage of the metal contact/spring thimble a1 and the voltage of the metal contact/spring thimble a3 to be in an equipotential state, so that the electrolytic reaction is stopped, the charging contact of the connecting component 10 and the earphone 200 is prevented from being corroded, and the service lives of the charging box and the wireless earphone 200 are prolonged.

Referring to fig. 11, a specific circuit schematic diagram of a control circuit for a charging box according to another embodiment of the present application is shown, for convenience of description, only the portion related to the embodiment is shown, and the detailed description is as follows:

in this embodiment, when the metal contact/pogo pin a1 and the a2 are connected, the power of the power supply 100 is transmitted to the earphone 200, the metal contact/pogo pin a3 has a second voltage, when the metal contact/pogo pin a1 and a2 or the earphone 200 has an electrolyte solution, the electrolyte solution and the metal contact/pogo pin a3 are subjected to an electrolytic reaction, the second voltage changes, the single chip microcomputer MCU detects the voltage of the metal contact/pogo pin a3, and when the second voltage changes, the voltage of the metal contact/pogo pin a1 and the voltage of the metal contact/pogo pin a3 are adjusted to be in an equipotential state.

When the single chip Microcomputer (MCU) judges that electrolyte solutions (such as sweat, water stain and the like) exist on the metal contact/spring thimble a1 and a2 or the earphone 200, the control circuit adjusts the voltage of the metal contact/spring thimble a1 and the voltage of the metal contact/spring thimble a3 to be in an equipotential state, so that the electrolytic reaction is stopped, the charging contacts of the connecting component 10 and the earphone 200 are prevented from being corroded, and the service lives of the charging box and the wireless earphone 200 are prolonged.

Referring to fig. 12, a specific flowchart of a control method for a charging box according to an embodiment of the present application is shown, for convenience of description, only the relevant portions of the present application are shown, and the following details are described below:

a control method for a charging box, comprising the steps of:

s01: the connecting assembly 10 is used to transmit the power of the power supply 100 to the headset 200 when connected;

s02: when the electrolyte solution exists on the connection assembly 10 or the earphone 200, the electrolyte solution and the connection assembly 10 are subjected to an electrolytic reaction by using the electrolytic assembly 20, and a second voltage is changed;

s03: the main control circuit 30 is used for detecting the voltage of the electrolytic component 20, and when the second voltage is detected to be changed, the voltage of the connecting component 10 and the voltage of the electrolytic component 20 are adjusted to be in an equipotential state.

In the control method, when it is determined that the connection assembly 10 or the wireless headset 200 has an electrolyte solution (such as sweat, water stain, etc.), the voltage of the connection assembly 10 and the voltage of the electrolysis assembly 20 are adjusted to be in an equipotential state, so that the electrolysis reaction is stopped, the charging contacts of the connection assembly 10 and the wireless headset 200 are prevented from being corroded, and the service lives of the charging box and the wireless headset 200 are prolonged.

In summary, the present application provides a control circuit and method, when it is determined that the connection assembly 10 or the earphone 200 has an electrolyte solution (such as sweat, water stain, etc.), the voltage of the connection assembly 10 and the voltage of the electrolysis assembly 20 are adjusted to be in an equipotential state, so as to stop the electrolysis reaction, avoid corroding the charging contacts of the connection assembly 10 and the earphone 200, and prolong the service life of the charging box and the wireless earphone 200.

In summary, the present invention provides a control circuit and a method for a charging box, wherein the control circuit is used for monitoring whether an electrolytic reaction occurs between a connection component and an electrolytic component during a charging process of an earphone using the charging box through the cooperation of the electrolytic component and a main control circuit, when the main control circuit detects that a second voltage changes, it is determined that an electrolyte solution (such as sweat, water stain, etc.) is present on the connection component or the earphone, whether the electrolytic reaction occurs between the connection component and the electrolytic component is determined, and at this time, the voltage of the connection component and the voltage of the electrolytic component are adjusted to be in an equipotential state, thereby stopping the electrolytic reaction, avoiding corrosion of charging contacts of the connection component and the earphone, prolonging service lives of the charging box and the wireless earphone, and ensuring that the charging is performed only when no electrolyte solution is present on the connection component or the earphone, thereby.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A control circuit for a charging box comprising a power supply for powering an attached headset, the power supply having a first voltage, the control circuit comprising:

2. The control circuit of claim 1, wherein the master circuit comprises:

3. The control circuit of claim 1, wherein the master circuit comprises:

the adjusting circuit is connected with the power supply and the power supply equipment and is used for adjusting the power supply and the power supply equipment to be at the same potential when receiving an adjusting control signal; and

4. The control circuit of claim 1, wherein the master circuit comprises a master chip.

5. The control circuit of claim 1, wherein the connection assembly is implemented using two metal contacts or two pogo pins; one of the metal contact pieces/the spring thimble is connected with the anode of the power supply, and the other metal contact piece/the spring thimble is connected with the cathode of the power supply; the electrolysis assembly is arranged in the area between the two metal contact pieces/the two spring ejector pins.

6. The control circuit of claim 1, wherein the electrolytic component is implemented using metal contacts or pogo pins.

7. The control circuit of claim 2, wherein the switching circuit is implemented by using two relays, windings of the two relays are connected with the main control assembly, a contact set of one of the relays is connected with the connecting assembly, and a contact set of the other relay is connected with the electrolytic assembly.

8. The control circuit of claim 1, further comprising:

9. A control method based on a control circuit for a charging box according to any of claims 1 to 8, the charging box comprising a power supply for powering an attached earphone, the power supply having a first voltage, characterized in that the control method comprises: