Oral irrigator control circuit and oral irrigator

Abstract

The utility model discloses an oral irrigator control circuit and an oral irrigator, and relates to the technical field of oral irrigator control, the oral irrigator is provided with a battery and a motor, and the oral irrigator control circuit comprises a switching circuit, a power supply circuit and a control circuit, the main control circuit is used for detecting the connection state of an external adapter, and the main control circuit is further used for controlling the switching circuit to control the connection between the battery and the motor to be disconnected under the condition that the switching circuit controls the connection between the battery and the motor and when it is detected that the oral irrigator is connected to the adapter; the main control circuit is also used for generating a charging control signal when detecting that the oral irrigator is connected to the adapter; and the charging circuit is used for converting the electric energy output by the adapter into the electric energy of the corresponding voltage when receiving the charging control signal so as to charge the battery. Thus, the oral irrigator in the working state can cut off the access between the battery and the motor by detecting that the adapter is connected, the service life of the battery can be prolonged, and the stability of an internal circuit can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water flosser control, and in particular to a water flosser control circuit and a water flosser. Background Art

[0002] With the advancement of technology and the enhancement of people's health awareness, the oral irrigator market has ushered in unprecedented development opportunities. Today's oral irrigators are increasingly diverse in function, but some users often put the oral irrigators in an adapter connected to a power source for charging. This incorrect charging habit actually poses a potential threat to the service life of the oral irrigator, which may not only accelerate the aging of the battery, but also cause damage to the internal circuit due to unstable current, thus affecting the overall performance and safety of the product. Utility Model Content

[0003] The main purpose of the utility model is to provide a water flosser control circuit and a water flosser, which is designed to solve the problem that users often put the water flosser in use into an adapter connected to a power source for charging, which causes the battery life to be shortened, the unstable current leads to damage to the internal circuit, and thus affects the overall performance and safety of the product.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a water flosser control circuit, wherein the water flosser is provided with a battery and a motor, and the water flosser control circuit comprises:

[0005] A switch circuit, wherein a first end of the switch circuit is connected to the battery, a second end of the switch circuit is electrically connected to the motor, and the switch circuit is used to control the on / off connection between the battery and the motor;

[0006] A main control circuit, wherein the switch control end of the main control circuit is electrically connected to the controlled end of the switch circuit, the voltage detection end of the main control circuit is electrically connected to the second end of the detection circuit, and the adapter detection end of the main control circuit is used to detect the connection status of an external adapter. The main control circuit is used to generate a cut-off control signal when it is detected that the water flosser is connected to the adapter while the switch circuit controls the connection between the battery and the motor, so as to control the switch circuit to control the disconnection between the battery and the motor; the main control circuit is also used to generate a charging control signal when it is detected that the water flosser is connected to the adapter;

[0007] A charging circuit, wherein a power output terminal of the charging circuit is electrically connected to a charging power input terminal of the battery, a charging control terminal of the charging circuit is electrically connected to a charging control terminal of the main control circuit, a power input terminal of the charging circuit is used for being electrically connected to the adapter, and the charging circuit is configured to convert electrical energy output by the adapter into electrical energy of a corresponding voltage to charge the battery when receiving a charging control signal.

[0008] In an embodiment, the main control circuit has a charging power display mode and a working power display mode, and the control circuit further includes:

[0009] A voltage detection circuit, wherein a first end of the voltage detection circuit is electrically connected to the battery, and a second end of the voltage detection circuit is electrically connected to the main control circuit; the voltage detection circuit is configured to detect a voltage value of the battery and output a corresponding voltage detection signal;

[0010] The main control circuit is further configured to output a charging power display signal according to the voltage detection signal when detecting that the oral irrigator is connected to the adapter; or output a working power display signal when detecting that the oral irrigator is in a working state;

[0011] A display circuit, wherein the display circuit is electrically connected to a display control terminal of the main control circuit and is configured to display the power of the battery according to the received charging power display signal or working power display signal.

[0012] In an embodiment, the display circuit includes:

[0013] A power display circuit, wherein the power display circuit is electrically connected to a power display control terminal of the main control circuit and is configured to display the battery power;

[0014] A drive mode display circuit, wherein the drive mode display circuit is electrically connected to a drive mode display control terminal of the main control circuit and is configured to display the drive mode selected by the user.

[0015] In an embodiment, the voltage detection circuit includes: a first voltage-dividing resistor, a second voltage-dividing resistor, a first resistor and a first capacitor;

[0016] A first end of the first voltage-dividing resistor, a first end of the first capacitor and a first end of the first resistor are electrically connected to a power input terminal of the main control circuit, a second end of the first voltage-dividing resistor and a first end of the second voltage-dividing resistor are electrically connected to a voltage detection terminal of the main control circuit, a second end of the second voltage-dividing resistor and a second end of the first capacitor are respectively grounded, and a second end of the first resistor is electrically connected to the positive power supply terminal, wherein the positive power supply terminal is the positive electrode of the battery.

[0017] In one embodiment, the control circuit further includes:

[0018] A surge protection circuit, a first end of the surge protection circuit is used to be electrically connected to the adapter, a second end of the surge protection circuit is electrically connected to a power input end of the charging circuit and an adapter detection end of the main control circuit, and the surge protection circuit is used to disconnect the electrical connection between the adapter and the charging circuit when the adapter DC power supply is overcurrent.

[0019] In one embodiment, the control circuit further includes an adapter positive terminal and an adapter negative terminal, and the adapter positive terminal and the adapter negative terminal are respectively used to access the positive electrode and the negative electrode of the adapter;

[0020] The surge protection circuit includes:

[0021] A fuse, a TVS diode, a second resistor, a third resistor, a fourth resistor and a fifth resistor. A first end of the fuse is electrically connected to the adapter positive terminal, a second end of the fuse is respectively electrically connected to a cathode of the TVS diode, a first end of the second resistor, a first end of the third resistor, a first end of the fourth resistor and a power supply end of the charging circuit. An anode of the TVS diode is grounded. A second end of the third resistor is electrically connected to a controlled end of the charging circuit and a charging control end of the main control circuit. A second end of the second resistor, a first end of the fifth resistor and a negative terminal of the adapter are respectively grounded. A second end of the fourth resistor and a second end of the fifth resistor are electrically connected to the adapter detection end of the main control circuit.

[0022] In one embodiment, the main control circuit has a soft drive mode, a cleaning drive mode and a massage drive mode, and the control circuit further includes:

[0023] A trigger circuit, a working signal output end of the trigger circuit is electrically connected to a working signal input end of the main control circuit, and the trigger circuit is used to generate a working signal according to a user operation trigger, so that the main control circuit selects any one of the soft drive mode, the cleaning drive mode and the massage drive mode according to the received working signal to drive the motor to work.

[0024] In one embodiment, the motor includes a motor, a motor positive terminal and a motor negative terminal, the control circuit further includes a power supply positive terminal and a power supply negative terminal, the power supply positive terminal and the power supply negative terminal are respectively used to access the positive electrode and the negative electrode of the battery, and the motor positive terminal is electrically connected to the power supply positive terminal;

[0025] The switch circuit includes:

[0026] A first switching transistor, a second switching transistor, a sixth resistor, and a seventh resistor. The input ends of the first switching transistor and the second switching transistor are both electrically connected to the negative terminal of the motor. The output ends of the first switching transistor and the second switching transistor are both electrically connected to the negative terminal of the power supply. The first end of the sixth resistor and the second end of the seventh resistor are both electrically connected to the controlled ends of the first switching transistor and the second switching transistor. The second end of the sixth resistor is grounded, and the first end of the seventh resistor is electrically connected to the main control circuit.

[0027] The present utility model further provides a dental irrigator, which includes the dental irrigator control circuit as described above.

[0028] The technical solution of the present utility model adopts a dental irrigator control circuit. The dental irrigator is provided with a battery and a motor. The dental irrigator control circuit includes: a switching circuit, the first end of the switching circuit is connected to the battery, the second end of the switching circuit is electrically connected to the motor, and the switching circuit is used to control the connection on / off between the battery and the motor; a main control circuit, the switch control end of the main control circuit is electrically connected to the controlled end of the switching circuit, the voltage detection end of the main control circuit is electrically connected to the second end of the detection circuit, the adapter detection end of the main control circuit is used to detect the connection state of an external adapter, and the main control circuit is used to generate a cut-off control signal to control the switching circuit to disconnect the connection between the battery and the motor when it detects that the dental irrigator is connected to the adapter while the switching circuit controls the connection between the battery and the motor; the main control circuit is further used to generate a charging control signal when it detects that the dental irrigator is connected to the adapter; a charging circuit, the power output end of the charging circuit is electrically connected to the charging power input end of the battery, the charging controlled end of the charging circuit is electrically connected to the charging control end of the main control circuit, the power input end of the charging circuit is used to be electrically connected to the adapter, and the charging circuit is used to convert the electric energy output by the adapter into electric energy of a corresponding voltage to charge the battery when receiving the charging control signal. In this way, when the dental irrigator is in the working state and detects the connection of the adapter, the main control circuit can cut off the path between the battery and the motor, so that the dental irrigator can increase the service life of the battery and the stability of the internal circuit, and improve the overall performance and safety of the dental irrigator. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0030] Figure 1 It is a circuit framework diagram of an embodiment of the dental irrigator control circuit provided by the present invention;

[0031] Figure 2 It is a circuit structure diagram of the voltage detection circuit and the switch circuit of an embodiment of the dental irrigator control circuit provided by the present invention;

[0032] Figure 3 It is a circuit structure diagram of the surge protection circuit of an embodiment of the dental irrigator control circuit provided by the present invention.

[0033] Explanation of the reference numerals in the drawings:

[0034] The realization of the object of the present invention, the functional features and advantages will be further described with reference to the embodiments and the accompanying drawings.

[0035] 1 - Main control circuit; 2 - Switch circuit; 3 - Charging circuit; 4 - Adapter; 5 - Motor; 6 - Display circuit; 61 - Battery level display circuit; 62 - Driving mode display circuit; 7 - Voltage detection circuit; 8 - Trigger circuit; R1 to R7 - First resistor to seventh resistor; Q1 - First switching transistor; Q2 - Second switching transistor; C1 - First capacitor; R8 - First voltage dividing resistor; R9 - Second voltage dividing resistor; F1 - Fuse; TVS1 - TVS diode. Specific embodiments

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0037] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if the embodiments of the present utility model involve descriptions such as "first" and "second", the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] The present utility model provides a control circuit for a dental irrigator. Please refer to Figures 1 to 3 , the dental irrigator is provided with a battery and a motor 5, and is characterized in that it includes:

[0040] A switch circuit 2, the first end of the switch circuit 2 is connected to the battery, the second end of the switch circuit 2 is electrically connected to the motor 5, and the switch circuit 2 is used to control the connection on / off between the battery and the motor 5;

[0041] A main control circuit 1, the switch control end of the main control circuit 1 is electrically connected to the controlled end of the switch circuit 2, the voltage detection end of the main control circuit 1 is electrically connected to the second end of the detection circuit, the adapter 4 detection end of the main control circuit 1 is used to detect the connection state of the external adapter 4, and the main control circuit 1 is used to generate a cut-off control signal to control the switch circuit 2 to control the disconnection of the connection between the battery and the motor 5 when the switch circuit 2 controls the connection between the battery and the motor 5 and the dental irrigator is detected to be connected to the adapter 4; the main control circuit 1 is further used to generate a charging control signal when the dental irrigator is detected to be connected to the adapter 4;

[0042] A charging circuit 3, the power output end of the charging circuit 3 is electrically connected to the charging power input end of the battery, the charging controlled end of the charging circuit 3 is electrically connected to the charging control end of the main control circuit 1, the power input end of the charging circuit 3 is used to be electrically connected to the adapter 4, and the charging circuit 3 is used to convert the electrical energy output by the adapter 4 into electrical energy of a corresponding voltage to charge the battery when receiving the charging control signal.

[0043] In this embodiment, the adapter 4 detection end of the main control circuit 1 determines whether the adapter 4 is connected by detecting the voltage value output by the adapter 4 powered by an external power supply. When the main control circuit 1 is connected to the adapter 4, the main control circuit 1 sends a charging control signal to the charging control end of the charging circuit 3 to control the charging circuit 3 to convert the electrical energy output by the adapter 4 into electrical energy of a corresponding voltage to charge the battery. When the main control circuit 1 controls the switch circuit 2 to connect the circuit between the battery and the motor 5, when the main control circuit 1 detects that the oral irrigator is connected to the adapter 4, a cut-off control signal is generated to control the switch circuit 2 to disconnect the circuit connection between the battery and the motor 5 and stop the working state of the oral irrigator. In this way, the service life of the battery in the oral irrigator can be increased and the stability of the internal circuit can be increased.

[0044] In this embodiment, the main control circuit 1 can be implemented by means such as MCU (Microcontroller Unit), DSP (Digital Signal Process), FPGA (Field Programmable Gate Array), and SOC (System On Chip). The charging circuit 3 can be implemented by different solutions such as DC-DC converters, charge pumps, linear voltage regulators, and power management chips.

[0045] In this embodiment, since the voltage and current of the electrical energy output by the adapter 4 are too large and cannot be directly output to the adapter 4 detection end of the main control circuit 1, the electrical energy output by the adapter 4 can be precisely adjusted by multiple voltage-dividing resistors to ensure that the output voltage and current meet the safe operating range input by the adapter 4 detection end of the main control circuit 1. This voltage-dividing resistor network is composed of multiple precision resistors connected in series and / or in parallel, and the resistance value is designed according to specific requirements to achieve the expected voltage reduction and current limiting effects.

[0046] In one embodiment, the motor 5 includes a motor 5, a positive electrode end of the motor 5, and a negative electrode end of the motor 5. The control circuit further includes a positive power supply end and a negative power supply end. The positive power supply end and the negative power supply end are respectively used to connect to the positive electrode and the negative electrode of the battery, and the positive electrode end of the motor 5 is electrically connected to the positive power supply end.

[0047] The switch circuit 2 includes:

[0048] The first switching transistor Q1, the second switching transistor Q2, the sixth resistor R6, and the seventh resistor R7. The input ends of the first switching transistor Q1 and the second switching transistor Q2 are both electrically connected to the negative terminal of the motor 5, and the output ends of the first switching transistor Q1 and the second switching transistor Q2 are both electrically connected to the negative terminal of the power supply;

[0049] The first end of the sixth resistor R6 and the second end of the seventh resistor R7 are both electrically connected to the controlled ends of the first switching transistor Q1 and the second switching transistor Q2. The second end of the sixth resistor R6 is grounded, and the first end of the seventh resistor R7 is electrically connected to the main control circuit 1.

[0050] In this embodiment, both the first switching transistor Q1 and the second switching transistor Q2 can be one of the switching transistors such as MOS transistors, triodes, and IGBT transistors.

[0051] In this embodiment, both the first switching transistor Q1 and the second switching transistor Q2 are NMOS transistors. The first switching transistor Q1 and the second switching transistor Q2 play a role in shunting. Compared with using a single switching transistor, the design of the dual switching transistors can significantly reduce the current pressure borne by each switching transistor and avoid the risk of damage to a single switching transistor caused by excessive current input from the positive terminal of the power supply.

[0052] In this embodiment, since the oral irrigator generally includes a battery, and the motor 5 also includes a positive terminal and a negative terminal, the control circuit of the motor 5 of the present invention is further provided with a positive terminal of the power supply and a negative terminal of the power supply, which are respectively used to connect to the positive electrode and the negative electrode of the battery to enable the battery to supply power to the motor 5. The main control circuit 1 controls the rotation speed of the motor 5 by sending different duty cycles to the motor 5.

[0053] In one embodiment, the main control circuit 1 has a charging power display mode and a working power display mode. The control circuit further includes:

[0054] A voltage detection circuit 7. The first end of the voltage detection circuit 7 is electrically connected to the battery, and the second end of the voltage detection circuit 7 is electrically connected to the main control circuit 1. The voltage detection circuit 7 is used to detect the voltage value of the battery and output a corresponding voltage detection signal;

[0055] The main control circuit 1 is further configured to output a charging power display signal according to the voltage detection signal when it is detected that the oral irrigator is connected to the adapter 4; or output a working power display signal when it is detected that the oral irrigator is in a working state;

[0056] A display circuit 6. The display circuit 6 is electrically connected to the display control end of the main control circuit 1 and is used to display the power of the battery according to the received charging power display signal or the working power display signal.

[0057] In this embodiment, the display circuit 6 can display the battery power through an LED lamp or a screen. The voltage detection circuit 7 can detect the battery power by calculating the power based on the voltage value detected by the main control circuit 1 through a voltage division circuit and the ADC detection port of the main control circuit, or an electricity meter can also be used.

[0058] In this embodiment, the charging power display mode is specifically that three LED lamps are adopted in the display circuit 6, namely the first LED lamp, the second LED lamp and the third LED lamp. The first LED lamp is selected as the charging status indicator. The main control circuit 1 has a charging power display mode and a working power display mode. The charging power display mode is set with a first voltage threshold (such as 3.5V), a second voltage threshold (such as 4.2V) and a third voltage threshold (such as 4V). When the tooth washer is charging, the first LED lamp flashes to indicate charging; and when the main control circuit 1 detects that the battery voltage is lower than the first voltage threshold, the second LED lamp flashes. When the main control circuit 1 detects that the battery voltage is higher than the first voltage threshold and lower than the second voltage threshold, the third LED lamp flashes. When the main control circuit 1 detects that the battery voltage is higher than the second voltage threshold, the third LED lamp is constantly on. The main control circuit 1 also generates a charging cut-off signal to control the charging circuit 3 to stop charging. And when the tooth washer is fully charged and the voltage consumed by the long-term connection of the adapter 4 drops to the third voltage threshold, the main control circuit 1 generates a charging conduction signal to control the charging circuit 3 to start charging. It is worth mentioning that the battery power is calculated by the main control circuit 1 based on the voltage detected by the voltage detection circuit 7.

[0059] In this embodiment, the working power display mode is specifically that three LED lamps are adopted in the display circuit 6, namely the first LED lamp, the second LED lamp and the third LED lamp. The first LED lamp is selected as the working status indicator. The working power display mode is designed with a fourth voltage threshold (such as 2.8V) and a fifth voltage threshold (such as 3.2V). When the tooth washer is working, the first LED lamp flashes to indicate that the tooth washer is working. When the main control circuit 1 detects that the battery voltage is lower than the fourth voltage threshold, the second LED lamp is constantly on to indicate low power, and after a predetermined time (such as 10S), the main control circuit 1 automatically generates a shutdown control signal to make the tooth washer shut down automatically; when the main control circuit 1 detects that the battery voltage is higher than the fourth voltage threshold and lower than the fifth voltage threshold, the second LED lamp is constantly on to indicate medium power; when the main control circuit 1 detects that the battery voltage is higher than the fifth voltage threshold, the third LED lamp is constantly on to indicate high power. It is worth mentioning that the working power display mode and the charging power display mode can adopt the same set of display circuit 6 or different display circuits 6 for control and display.

[0060] Specifically, the voltage detection circuit 7 includes: a first voltage dividing resistor R8, a second voltage dividing resistor R9, a first resistor R1, and a first capacitor C1;

[0061] The first end of the first voltage dividing resistor R8, the first end of the first capacitor C1, and the first end of the first resistor R1 are electrically connected to the power input terminal of the main control circuit 1. The second end of the first voltage dividing resistor R8 and the first end of the second voltage dividing resistor R9 are electrically connected to the voltage detection terminal of the main control circuit 1. The second end of the second voltage dividing resistor R9 and the second end of the first capacitor C1 are respectively grounded. The second end of the first resistor R1 is electrically connected to the positive power supply terminal, where the positive power supply terminal is the positive electrode of the battery. Here, the ADC sampling port of the main control circuit 1 is connected to the battery through the first voltage dividing resistor R8 and the second voltage dividing resistor R9 to form a voltage dividing circuit, so as to ensure that the ADC sampling port of the main control circuit 1 can safely and accurately collect the voltage value of the battery. The main control circuit calculates and processes the collected voltage value of the battery to obtain the battery power, thereby completing the power detection function of the oral irrigator.

[0062] In an embodiment, the display circuit 6 includes:

[0063] A power display circuit 61, which is electrically connected to the power display control terminal of the main control circuit 1 and is used to display the battery power;

[0064] A drive mode display circuit 62, which is electrically connected to the drive mode display control terminal of the main control circuit 1 and is used to display the drive mode selected by the user.

[0065] In this embodiment, the display circuit 6 is configured as a power display circuit 61 for displaying the working power and the charging power, and is also configured as a drive mode display circuit 62 for displaying the drive mode selected by the user. When the main control circuit 1 receives a working signal sent by an external wireless communication module or an internal trigger, the main control circuit 1 generates a corresponding drive display signal to control the drive mode display circuit 62.

[0066] In this embodiment, the drive mode display circuit 62 can be provided with a screen or multiple LED lights. For example, when the main control circuit 1 is provided with N drive modes, the LED lights can also be set to N, and the N LED lights correspond to the N drive modes one by one to display the drive mode selected by the user.

[0067] In an embodiment, the control circuit further includes:

[0068] A surge protection circuit 9, the first end of the surge protection circuit 9 is used to be electrically connected to the adapter 4, the second end of the surge protection circuit is electrically connected to the power input end of the charging circuit 3 and the adapter 4 detection end of the main control circuit 1, and the surge protection circuit is used to disconnect the electrical connection between the adapter 4 and the charging circuit 3 when the direct current power of the adapter 4 is overcurrent.

[0069] In this embodiment, the surge protection circuit is arranged in the line between the power input end of the charging circuit 3 and the adapter 4 detection end of the main control circuit 1, so as to protect the oral irrigator from being damaged by instantaneous overvoltage or overcurrent, and improve the stability and reliability of the system.

[0070] Specifically, the control circuit further includes the positive extreme of the adapter 4 and the negative extreme of the adapter 4, and the positive extreme of the adapter 4 and the negative extreme of the adapter 4 are respectively used to access the positive pole and the negative pole of the adapter 4;

[0071] The surge protection circuit 9 includes:

[0072] A fuse F1, a TVS diode TVS1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a fifth resistor R5. The first end of the fuse F1 is electrically connected to the positive extreme of the adapter 4, and the second end of the fuse F1 is respectively electrically connected to the cathode of the TVS diode, the first end of the second resistor R2, the first end of the third resistor R3, the first end of the fourth resistor R4 and the power supply end of the charging circuit 3. The anode of the TVS diode is grounded. The second end of the third resistor R3 is electrically connected to the controlled end of the charging circuit 3 and the charging control end of the main control circuit 1. The second end of the second resistor R2, the first end of the fifth resistor R5 and the negative extreme of the adapter 4 are respectively grounded. The second end of the fourth resistor R4 and the second end of the fifth resistor R5 are electrically connected to the adapter 4 detection end of the main control circuit 1.

[0073] In this embodiment, the surge protection circuit 9 is provided with a fuse F1 to prevent the charging circuit 3 and the main control circuit 1 from being damaged when the power supply of the adapter 4 is overcurrent. The surge protection circuit is provided with a TVS diode TVA1 to protect the charging circuit 3 and the main control circuit 1 from being impacted by transient high-voltage spike pulses. Here, the fourth resistor R4 and the fifth resistor R5 are used as voltage-dividing resistors for the adapter detection end of the main control circuit 1 to avoid too high voltage being input to the adapter detection end of the main control circuit 1 and damaging the main control circuit 1.

[0074] In this embodiment, the surge protection circuit also forwards the electric energy output by the adapter 4 to the power supply end of the charging circuit 3, so that the charging circuit 3 has sufficient power to charge the battery. The voltage in the power supply output by the adapter 4 is also sent to the controlled end of the charging circuit 3 and the charging control end of the main control circuit 1, so that when the adapter 4 outputs power to the charging circuit 3, the main control circuit 1 can timely turn on or off the charging circuit 3.

[0075] In one embodiment, the main control circuit 1 has a gentle driving mode, a cleaning driving mode, and a massage driving mode. The control circuit further includes:

[0076] A trigger circuit 8, the working signal output end of the trigger circuit 8 is electrically connected to the working signal input end of the main control circuit 1. The trigger circuit 8 is used to generate a working signal according to the user operation, so that the main control circuit 1 can select any one of the gentle driving mode, the cleaning driving mode, and the massage driving mode according to the received working signal to drive the motor 5 to work.

[0077] In this embodiment, the trigger circuit 8 can be implemented by triggers such as buttons, toggle switches, and touch sensors provided on the outer shell of the oral irrigator. The trigger circuit 8 can also be implemented by a wireless communication module and an external terminal provided in the oral irrigator. The user only needs to send a wireless control signal to the main control circuit 1 through a dedicated application program of an external terminal such as a mobile phone, and can easily realize the remote control of the trigger circuit 8 in the oral irrigator.

[0078] Specifically, the trigger circuit 8 is implemented by setting a button. When the user presses the button, the selection of the driving mode in the main control circuit 1 can be made according to the number of conduction times or the conduction duration. For example, when the user presses the button once, the main control circuit 1 selects the gentle driving mode. When the button is pressed again, the main control circuit 1 selects the cleaning driving mode. When the button is pressed again, the main control circuit 1 selects the massage driving mode. After the next button press, the main control circuit 1 returns to the selected driving mode, and so on, so as to realize the selection of the driving mode of the oral irrigator by one button, making the user operation convenient and fast.

[0079] The present utility model also proposes an oral irrigator, which includes an oral irrigator control circuit and an oral irrigator. The specific structure of the oral irrigator control circuit refers to the above embodiment. Since this oral irrigator adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0080] The technical solution of the present utility model adopts an oral irrigator control circuit. The oral irrigator is provided with a battery and a motor. The oral irrigator control circuit includes: a switch circuit, the first end of the switch circuit is connected to the battery, the second end of the switch circuit is electrically connected to the motor, and the switch circuit is used to control the connection on / off between the battery and the motor; a main control circuit, the switch control end of the main control circuit is electrically connected to the controlled end of the switch circuit, the voltage detection end of the main control circuit is electrically connected to the second end of the detection circuit, the adapter detection end of the main control circuit is used to detect the connection status of an external adapter, and the main control circuit is used to generate a cut-off control signal to control the switch circuit to disconnect the connection between the battery and the motor when it is detected that the oral irrigator is connected to the adapter under the condition that the switch circuit controls the connection between the battery and the motor; the main control circuit is further used to generate a charging control signal when it is detected that the oral irrigator is connected to the adapter; a charging circuit, the power output end of the charging circuit is electrically connected to the charging power input end of the battery, the charging controlled end of the charging circuit is electrically connected to the charging control end of the main control circuit, the power input end of the charging circuit is used to be electrically connected to the adapter, and the charging circuit is used to convert the electric energy output by the adapter into electric energy of a corresponding voltage to charge the battery when receiving the charging control signal. In this way, when the oral irrigator is in the working state, it can cut off the path between the battery and the motor through the main control circuit when detecting the connection of the adapter, so that the oral irrigator can increase the service life of the battery and the stability of the internal circuit, and improve the overall performance and safety of the oral irrigator.

[0081] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A water flosser control circuit, characterized in that: The water flosser is provided with a battery and a motor, and the water flosser control circuit includes: A switch circuit, wherein a first end of the switch circuit is connected to the battery, a second end of the switch circuit is electrically connected to the motor, and the switch circuit is used to control the on / off connection between the battery and the motor; A main control circuit, wherein the switch control end of the main control circuit is electrically connected to the controlled end of the switch circuit, the voltage detection end of the main control circuit is electrically connected to the second end of the voltage detection circuit, and the adapter detection end of the main control circuit is used to detect the connection status of an external adapter. The main control circuit is used to generate a cut-off control signal when it is detected that the water flosser is connected to the adapter while the switch circuit controls the connection between the battery and the motor, so as to control the switch circuit to control the disconnection between the battery and the motor; the main control circuit is also used to generate a charging control signal when it is detected that the water flosser is connected to the adapter; A charging circuit, wherein the power output terminal of the charging circuit is electrically connected to the charging power input terminal of the battery, the charging controlled terminal of the charging circuit is electrically connected to the charging control terminal of the main control circuit, the power input terminal of the charging circuit is used to be electrically connected to the adapter, and the charging circuit is used to convert the electric energy output by the adapter into electric energy of corresponding voltage when receiving a charging control signal to charge the battery.

2. The water flosser control circuit according to claim 1, characterized in that: The main control circuit has a charging power display mode and a working power display mode, and the control circuit also includes: a voltage detection circuit, wherein a first end of the voltage detection circuit is electrically connected to the battery, and a second end of the voltage detection circuit is electrically connected to the main control circuit; the voltage detection circuit is used to detect the voltage value of the battery and output a corresponding voltage detection signal; The main control circuit is also used to output a charging power display signal according to the voltage detection signal when it is detected that the oral irrigator is connected to the adapter; or output a working power display signal when it is detected that the oral irrigator is in a working state; The display circuit is electrically connected to the display control terminal of the main control circuit and is used to display the battery power according to receiving the charging power display signal or the working power display signal.

3. The water flosser control circuit according to claim 2, characterized in that: The display circuit comprises: A power display circuit, the power display circuit is electrically connected to the power display control terminal of the main control circuit, and is used to display the battery power; The driving mode display circuit is electrically connected to the driving mode display control terminal of the main control circuit and is used to display the driving mode selected by the user.

4. The water flosser control circuit according to claim 2, characterized in that: The voltage detection circuit comprises: a first voltage-dividing resistor, a second voltage-dividing resistor, a first resistor and a first capacitor; The first end of the first voltage-dividing resistor, the first end of the first capacitor and the first end of the first resistor are electrically connected to the power input end of the main control circuit, the second end of the first voltage-dividing resistor and the first end of the second voltage-dividing resistor are electrically connected to the voltage detection end of the main control circuit, the second end of the second voltage-dividing resistor and the second end of the first capacitor are grounded respectively, and the second end of the first resistor is electrically connected to the positive end of the power supply, wherein the positive end of the power supply is used to connect to the positive pole of the battery.

5. The water flosser control circuit according to claim 1, characterized in that: The control circuit further comprises: A surge protection circuit, wherein a first end of the surge protection circuit is used to be electrically connected to the adapter, and a second end of the surge protection circuit is electrically connected to a power input end of the charging circuit and an adapter detection end of the main control circuit. The surge protection circuit is used to disconnect the electrical connection between the adapter and the charging circuit when the DC power supply of the adapter has an overcurrent.

6. The water flosser control circuit according to claim 5, characterized in that: The control circuit also includes an adapter positive terminal and an adapter negative terminal, wherein the adapter positive terminal and the adapter negative terminal are respectively used to connect to the positive electrode of the adapter and the negative electrode of the adapter; The surge protection circuit comprises: A fuse, a TVS diode, a second resistor, a third resistor, a fourth resistor and a fifth resistor, wherein the first end of the fuse is electrically connected to the positive terminal of the adapter, the second end of the fuse is electrically connected to the cathode of the TVS diode, the first end of the second resistor, the first end of the third resistor, the first end of the fourth resistor and the power supply end of the charging circuit respectively, the anode of the TVS diode is grounded, the second end of the third resistor is electrically connected to the controlled end of the charging circuit and the charging control end of the main control circuit, the second end of the second resistor, the first end of the fifth resistor and the negative terminal of the adapter are grounded respectively, and the second end of the fourth resistor and the second end of the fifth resistor are electrically connected to the adapter detection end of the main control circuit.

7. The oral irrigator control circuit according to claim 1, characterized in that: The main control circuit has a gentle driving mode, a cleaning driving mode and a massage driving mode, and the control circuit also includes: A trigger circuit, wherein the working signal output terminal of the trigger circuit is electrically connected to the working signal input terminal of the main control circuit, and the trigger circuit is used to generate a working signal according to a user operation trigger, so that the main control circuit can select any one of the soft drive mode, the cleaning drive mode and the massage drive mode to drive the motor to work according to the received working signal.

8. The oral irrigator control circuit according to any one of claims 1 to 7, characterized in that: The motor includes a positive terminal and a negative terminal, and the control circuit also includes a positive terminal and a negative terminal of a power supply, the positive terminal of the power supply and the negative terminal of the power supply are respectively used to connect to the positive electrode of the battery and the negative electrode of the battery, and the positive terminal of the motor is electrically connected to the positive terminal of the power supply; The switch circuit comprises: A first switch tube, a second switch tube, a sixth resistor, and a seventh resistor, wherein the input end of the first switch tube and the input end of the second switch tube are both electrically connected to the negative end of the motor, and the output end of the first switch tube and the output end of the second switch tube are both electrically connected to the negative end of the power supply; The first end of the sixth resistor and the second end of the seventh resistor are both electrically connected to the controlled end of the first switch tube and the controlled end of the second switch tube, the second end of the sixth resistor is grounded, and the first end of the seventh resistor is electrically connected to the main control circuit.

9. A water flosser, characterized in that: The oral irrigator comprises the oral irrigator control circuit as described in any one of claims 1-8.

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