Tooth cleaning control method of tooth cleaner

Abstract

The invention discloses a tooth cleaning control method of a tooth cleaner. The method comprises the following steps: S001, starting the tooth cleaner, and manually setting a force gear; s002, the dental scaler automatically adjusts the force of the cleaning head to a standby value; s003, whether the cleaning head makes contact with a hard object or not is detected, if the hard object is detected, the step S004 is executed, and if the hard object is not detected, the step S005 is executed; s004, the dental scaler automatically adjusts the force to a set gear, and the cleaning head cleans the hard object; s005, detecting whether the force of pressing the hard object by the cleaning head is overloaded or not, if the overload is detected, entering S006, and if the overload is not detected, entering S003; and S006, an overload alarm is given out to prompt a user, the user enables the cleaning head to be away from the hard object, and meanwhile the step S002 is executed. The energy loss can be reduced, the service life of the dental scaler is prolonged, the working time of the dental scaler is prolonged, the teeth can be prevented from being damaged by the cleaning head, and the safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oral cleaning tools, and particularly refers to an oral cleaning device with a pressure feedback function. Background Art

[0002] As people pay more and more attention to oral health, various tools for cleaning teeth have emerged on the market. Ultrasonic tooth cleaners use the high frequency and high energy generated by ultrasonic waves to drive the cleaning head, so as to loosen the fine dental calculus attached to the teeth, remove dirt such as dental plaque, make the teeth clean, and maintain oral health.

[0003] When the current ultrasonic tooth cleaners are in specific use, they are held, and the cleaning head at the upper end of the ultrasonic tooth cleaner is used to contact the teeth, and through ultrasonic vibration, the teeth are cleaned. In this process, a certain amount of force is required to drive the cleaning head to press on the tooth surface in order to achieve effective cleaning. However, since the current ultrasonic tooth cleaners (such as CN116269882A, CN219680830U, CN219846912U, CN220801158U, etc.) do not have the function of detecting the pressing force, it is impossible to know the pressure of the cleaning head on the tooth surface. If the pressure is too large, it will damage the teeth and cause great trouble to the user. Therefore, an oral cleaning device with a pressure feedback function is needed.

[0004] In view of this, the inventor of the present invention proposes the following technical solutions. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a tooth cleaning control method for a tooth cleaner.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions: The tooth cleaning control method of the tooth cleaner includes the following steps: S001: The tooth cleaner is powered on, and the strength gear is manually set; S002: The tooth cleaner automatically adjusts the strength of the cleaning head to the standby value; S003: Detect whether the cleaning head touches a hard object. If a hard object is detected, go to S004. If no hard object is detected, go to S005; S004: The tooth cleaner automatically adjusts the strength to the set gear, and the cleaning head cleans the hard object accordingly; S005: Detect whether the strength of the cleaning head pressing on the hard object is overloaded. If overload is detected, go to S006. If no overload is detected, go to S003; S006: An overload alarm is issued to prompt the user, and the user moves the cleaning head away from the hard object, and at the same time enters S002.

[0007] Furthermore, in the above technical solution, an ultrasonic transducer connected to the cleaning head and driving the cleaning head to vibrate, a control circuit board for controlling the operation of the ultrasonic transducer, and a battery for power supply are arranged inside the tooth cleaner. The control circuit board is provided with an MCU controller, a driving circuit connected to the MCU controller and used for the operation of the ultrasonic transducer, and a transformer connected to the driving circuit. Among them, the transformer includes a primary winding, a secondary winding, and a feedback winding. The primary winding is connected to the driving circuit, the secondary winding is connected to the ultrasonic transducer, and the feedback winding is connected to a load detection circuit for detecting the current load conditions of the ultrasonic transducer and the cleaning head and cooperating with the MCU controller to determine whether the force of pressing a hard object by the cleaning head is overloaded. The load detection circuit is connected to the MCU controller; the control circuit board is also connected to an alarm circuit for issuing an alarm when the MCU controller determines that the force of pressing a hard object by the cleaning head is overloaded.

[0008] Furthermore, in the above technical solution, the secondary winding is also connected to an inductor for secondary boosting, and the inductor is connected to the ultrasonic transducer.

[0009] Furthermore, in the above technical solution, one end of the feedback winding is grounded, and the other end of the feedback winding is connected to the load detection circuit. The load detection circuit includes a diode D7, a first voltage-dividing resistor R17, and a second voltage-dividing resistor R19 connected in series in sequence. The other end of the second voltage-dividing resistor R19 connected to the first voltage-dividing resistor R17 is grounded, and a first capacitor C10 is also connected in parallel across the two ends of the second voltage-dividing resistor R19. The diode D7 is connected to the other end of the feedback winding, and the connection line between the second voltage-dividing resistor R19 and the first voltage-dividing resistor R17 is connected to the MCU controller.

[0010] Furthermore, in the above technical solution, one end of the primary winding is connected to the driving circuit, the other end is grounded after being connected to a second capacitor C4, and the other end of the primary winding is also connected to the battery.

[0011] Furthermore, in the above technical solution, the driving circuit includes a MOS transistor, a first resistor R9 connected to the G pole of the MOS transistor, a second resistor R12 connected to the S pole of the MOS transistor, a third resistor R11 connected between the G pole and the S pole of the MOS transistor, and a third capacitor C6 connected in parallel across the two ends of the first resistor R9. The D pole of the MOS transistor is connected to the primary winding, and the first resistor R9 is connected to the MCU controller.

[0012] Furthermore, in the above technical solution, the drive circuit is further connected to a current detection circuit for cooperating with the MCU controller to detect the vibration frequency of the ultrasonic transducer. The current detection circuit is connected to the MCU controller. The current detection circuit includes a fourth resistor R13. One end of the fourth resistor R13 is connected to the connection line between the S pole of the MOS transistor and the second resistor R12, and the other end of the fourth resistor R13 is connected to the MCU controller.

[0013] Furthermore, in the above technical solution, the alarm circuit includes a buzzer or a speaker for emitting a sound alarm; alternatively, the alarm circuit includes a vibration motor for emitting a vibration alarm; alternatively, the alarm circuit includes an LED lamp for emitting a light alarm.

[0014] Furthermore, in the above technical solution, the control circuit board is further provided with a lithium battery charging management chip, a power-on / off and gear-shifting button electrically connected to the lithium battery charging management chip, an external power supply charging wake-up circuit electrically connected to the lithium battery charging management chip, a battery socket electrically connected to the lithium battery charging management chip, a charging interface electrically connected to the lithium battery charging management chip, and a gear position indicator group. The lithium battery charging management chip, the external power supply charging wake-up circuit, the power-on / off and gear-shifting button, the battery socket for connecting to the battery, and the gear position indicator group are all connected to the MCU controller. The external power supply charging wake-up circuit is further connected to the charging interface; the control circuit board is further provided with a headlight socket and a charging indicator group electrically connected to the MCU controller. The headlight socket and the charging indicator group are also both connected to the battery socket; an illuminating lamp module for external illumination is provided at the upper end of the housing of the tooth cleaner, and the illuminating lamp module is electrically connected to the headlight socket.

[0015] Furthermore, in the above technical solution, the external power supply charging wake-up circuit includes a fifth resistor R1 and a sixth resistor R2 connected in series. The fifth resistor R1 is further connected to the battery socket and the lithium battery charging management chip, and the connection line between the fifth resistor R1 and the sixth resistor R2 is further connected to the MCU controller.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The tooth cleaning control method of the tooth cleaner of the present invention enters the standby state after being powered on. And after manually setting the strength level, it will not immediately drive the cleaning head to work according to the set strength level. Instead, it detects in real time whether the cleaning head touches a hard object (such as a tooth). Only after detecting a hard object, it automatically adjusts the strength to the set level, and the cleaning head cleans the hard object accordingly. This can reduce energy consumption, improve the service life and working duration of the tooth cleaner. At the same time, it detects whether the force of the cleaning head pressing on the hard object is overloaded. If overload is detected, an overload alarm is issued to prompt the user, and the user moves the cleaning head away from the hard object, that is, at this time the user moves the cleaning head outwards to leave the tooth (i.e., the hard object), so that the cleaning head can hardly damage the tooth, and the tooth cleaner automatically adjusts the strength of the cleaning head to the standby value, thus avoiding damage to the tooth by the cleaning head. If no overload is detected, the cleaning head continuously cleans the hard object until it is detected that the cleaning head does not touch a hard object (such as a tooth). The tooth cleaning control method steps of the tooth cleaner of the present invention are logically reasonable, which can not only reduce energy consumption, improve the service life and working duration of the tooth cleaner, but also avoid damage to the tooth by the cleaning head, improve safety, and have strong market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the schematic diagram of the present invention; Figure 2 is the circuit diagram of the present invention; Figure 3 is the perspective view of the tooth cleaner used in the present invention; Figure 4 is the internal structure diagram of the tooth cleaner used in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be further described below in conjunction with specific embodiments and the drawings.

[0019] See Figure 1 as shown, which is the schematic diagram of the tooth cleaning control method of the tooth cleaner of the present invention. The tooth cleaning control method of the tooth cleaner of the present invention includes the following steps: S001: The tooth cleaner is powered on, and the strength level is manually set; S002: The tooth cleaner automatically adjusts the strength of the cleaning head to the standby value; S003: Detect whether the cleaning head touches a hard object. If a hard object is detected, go to S004. If no hard object is detected, go to S005; S004: The tooth cleaner automatically adjusts the strength to the set level, and the cleaning head cleans the hard object accordingly; S005: Detect whether the force of the cleaning head pressing on a hard object is overloaded (i.e., detect whether the load condition of the cleaning head is overloaded). If overload is detected, go to S006; if no overload is detected, go to S003; S006: Issue an overload alarm to prompt the user. The user then moves the cleaning head away from the hard object and simultaneously enters S002.

[0020] The tooth cleaning control method of the dental cleaner of the present invention enters the standby state after being powered on. And after manually setting the force level, it will not immediately drive the cleaning head to work according to the set force level. Instead, it detects in real time whether the cleaning head touches a hard object (such as a tooth). Only after detecting a hard object, it automatically adjusts the force to the set level, and the cleaning head cleans the hard object accordingly. This can reduce energy consumption, improve the service life and working duration of the dental cleaner. At the same time, it detects whether the force of the cleaning head pressing on the hard object is overloaded. If overload is detected, an overload alarm is issued to prompt the user, and the user then moves the cleaning head away from the hard object, that is, at this time, the user moves the cleaning head outward to leave the tooth (i.e., the hard object), so that the cleaning head can hardly damage the tooth, and the dental cleaner automatically adjusts the force of the cleaning head to the standby value, thus avoiding damage to the tooth by the cleaning head. If no overload is detected, the cleaning head continuously cleans the hard object until it detects that the cleaning head does not touch a hard object (such as a tooth). The tooth cleaning control method steps of the dental cleaner of the present invention have reasonable logic, can not only reduce energy consumption, improve the service life and working duration of the dental cleaner, but also avoid damage to the tooth by the cleaning head, improve safety, and have strong market competitiveness.

[0021] Combined with Figures 2 - 4 As shown, it is an oral cleaning device with a pressure feedback function, which includes a housing 1, an ultrasonic transducer 2 installed in the housing 1, a cleaning head 3 installed at the upper end of the ultrasonic transducer 2, a control circuit board 4 for controlling the operation of the ultrasonic transducer 2, and a battery 5 for power supply. During operation, the battery 5 supplies power to the entire oral cleaning device, and the control circuit board 4 controls the operation of the ultrasonic transducer 2. The ultrasonic transducer 2 drives the cleaning head 3 to vibrate to clean the oral cavity. Among them, in this embodiment, the cleaning head 3 is the tooth cleaning head.

[0022] The control circuit board 4 is provided with an MCU controller 41, a driving circuit 42 connected to the MCU controller 41 and used for the operation of the ultrasonic transducer 2, and a transformer 43 connected to the driving circuit 42, wherein the transformer 43 includes a primary winding 431, a secondary winding 432 and a feedback winding 433, the primary winding 431 is connected to the driving circuit 42, the secondary winding 432 is connected to the transformer 43, the feedback winding 433 is connected to a load detection circuit 44 for detecting the current load conditions of the ultrasonic transducer 2 and the cleaning head and cooperating with the MCU controller 41 to determine whether the force of the cleaning head 3 pressing the hard object is overloaded, and the load detection circuit 44 is connected to the MCU controller 41; the control circuit board 4 is also connected to an alarm circuit 40 for issuing an alarm when the MCU controller 41 determines that the force of the cleaning head 3 pressing the hard object is overloaded.

[0023] When the control circuit board 4 controls the ultrasonic transducer 2 to work, the MCU controller 41 outputs a control signal to the drive circuit 42, and the drive circuit 42 is turned on to drive the primary winding 431 of the transformer 43 to oscillate the secondary winding 432 through the principle of electromagnetic induction, thereby driving the ultrasonic transducer 2 to work. The ultrasonic transducer 2 outputs ultrasonic vibrations to the cleaning head 3 to achieve the purpose of controlling the operation of the cleaning head 3; since the transformer 43 is additionally provided with a feedback winding 433, the feedback winding 433 is used to detect the current load condition of the ultrasonic transducer 2, and cooperate with the MCU controller 41 to determine the pressure of the cleaning head 3, that is, to realize the pressure feedback function. When it is determined that the pressing force exceeds the set value (that is, overload), the MCU controller 41 outputs a signal to the alarm circuit 40, and the alarm circuit 40 sends an alarm to remind the user, and the user moves the cleaning head 3 outward to away from the teeth, thereby preventing the cleaning head 3 from damaging the teeth as much as possible. At the same time, the MCU controller 41 can also output a control signal to the driving circuit 42, and the driving circuit 42 is turned on to drive the primary winding 431 of the transformer 43 to control the secondary winding 432 to reduce the operating frequency of the ultrasonic transducer 2 through the principle of electromagnetic induction, thereby controlling and reducing the vibration amplitude / intensity of the cleaning head 3, so that the cleaning head 3 will not damage the teeth as much as possible, and even control the ultrasonic transducer 2 to be in standby state, thereby avoiding the cleaning head 3 from damaging the teeth.

[0024] The alarm circuit 40 includes a buzzer 400 or a speaker for sound alarm; or, the alarm circuit 40 includes a vibration motor for vibration alarm; or, the alarm circuit 40 includes an LED lamp for light alarm. As a preferred embodiment, the alarm circuit 40 includes a buzzer 400 for sound alarm. When the alarm circuit 40 is working, the buzzer emits a sound alarm to notify the user.

[0025] Combination Figure 2As shown, the primary winding 431 is between pin 2 and pin 5 of the transformer 43, the feedback winding 433 is between pin 3 and pin 4 of the transformer 43, and the secondary winding 432 is between pin 6 and pin 10 of the transformer 43.

[0026] The secondary winding 432 is also connected to an inductor 45 for secondary boost, and this inductor 45 is connected to the ultrasonic transducer 2. The inductor 45 can boost the voltage output from the secondary winding 432 to the ultrasonic transducer 2 for secondary boost, so as to better drive the ultrasonic transducer 2 to work.

[0027] One end of the feedback winding 433 is grounded, the other end of the feedback winding 433 is connected to a load detection circuit 44. The load detection circuit 44 includes a diode D7, a first voltage-dividing resistor R17, and a second voltage-dividing resistor R19 connected in series in sequence. The other end of the second voltage-dividing resistor R19 connected to the first voltage-dividing resistor R17 is grounded, and a first capacitor C10 is also connected in parallel across the two ends of the second voltage-dividing resistor R19. The diode D7 is connected to the other end of the feedback winding 433, and the connection line between the second voltage-dividing resistor R19 and the first voltage-dividing resistor R17 is connected to the MCU controller 41. The feedback winding 433 is rectified by the diode D7, and the voltage is divided by the first voltage-dividing resistor R17 and the second voltage-dividing resistor R19, and then the voltage signal is fed back to the MCU controller 41. The MCU controller 41 judges the current load condition of the ultrasonic transducer 2 through the received voltage signal, and then determines the pressing force of the cleaning head 3, that is, the pressure feedback function is realized.

[0028] One end of the primary winding 431 is connected to the drive circuit 42, the other end is grounded after being connected to the second capacitor C4, and the other end of the primary winding 431 is also connected to the battery.

[0029] The drive circuit 42 includes an MOS transistor 421, a first resistor R9 connected to the G pole of the MOS transistor 421, a second resistor R12 connected to the S pole of the MOS transistor 421, a third resistor R11 connected between the G pole and the S pole of the MOS transistor 421, and a third capacitor C6 connected in parallel across the two ends of the first resistor R9. The D pole of the MOS transistor 421 is connected to the primary winding 431, and the first resistor R9 is connected to the MCU controller 41. When the drive circuit 42 works, the MCU controller 41 outputs a signal to the MOS transistor 421 to control the MOS transistor 421 to work. The MOS transistor 421 drives the primary winding 431 of the transformer 43 to make the secondary winding 432 vibrate through the principle of electromagnetic induction, and then drives the ultrasonic transducer 2 to work.

[0030] The driving circuit 42 is further connected to a current detection circuit 46 for cooperating with the MCU controller 41 to detect the vibration frequency of the ultrasonic transducer 2. The current detection circuit 46 is connected to the MCU controller 41. Among them, the current detection circuit 46 includes a fourth resistor R13. One end of the fourth resistor R13 is connected to the connection line between the S pole of the MOS transistor 421 and the second resistor R12, and the other end of the fourth resistor R13 is connected to the MCU controller 41. The current detection circuit 46 is used to detect the current passing through the second resistor R12, and transmit the current signal to the MCU controller 41. The MCU controller 41 detects the vibration frequency of the ultrasonic transducer 2, so as to be able to more accurately adjust the vibration frequency of the ultrasonic transducer 2 in the later stage.

[0031] The control circuit board 4 is further provided with a lithium battery charging management chip 47, a power-on / off and gear-shifting button 48 electrically connected to the lithium battery charging management chip 47, an external power supply charging wake-up circuit 49 electrically connected to the lithium battery charging management chip 47, a battery socket 401 electrically connected to the lithium battery charging management chip 47, a charging interface 402 electrically connected to the lithium battery charging management chip 47, and a gear indicator group 403. The lithium battery charging management chip 47, the external power supply charging wake-up circuit 49, the power-on / off and gear-shifting button 48, the battery socket 401 for connecting to the battery, and the gear indicator group 403 are all connected to the MCU controller 41. The external power supply charging wake-up circuit 49 is further connected to the charging interface 402.

[0032] The power-on / off and gear-shifting button 48 is used to control the operation of the entire circuit, that is, to control the power-on and power-off of the entire oral cleaning device. At the same time, the power-on / off and gear-shifting button 48 can also control the gear of the ultrasonic transducer 2. Specifically, the power-on / off and gear-shifting button 48 outputs different control signals to the MCU controller 41 by the number of presses or time, and then the MCU controller 41 controls the driving circuit 42 to work, and cooperates with the transformer to drive the ultrasonic transducer 2 to work in different gears. At the same time, the gear indicator group 403 displays the corresponding gear of the ultrasonic transducer 2, so that the user can know the current working gear information. In this embodiment, the gear indicator group 403 includes 5 LEDs, which are used to define 5 different gears, and the 5 LEDs are respectively connected to a pin of the MCU controller 41 to achieve independent control of lighting.

[0033] The lithium battery charging management chip 47 is used to manage the charging of the battery, which is common knowledge.

[0034] The working principle of the external power supply charging and wake-up circuit 49 is as follows: When the charging interface 402 is inserted and outputs voltage, the external power supply charging and wake-up circuit 49 starts a 5V voltage to charge chips such as the lithium battery charging management chip 47 and the MCU controller 41, so as to start the operation of the entire circuit. Among them, the external power supply charging and wake-up circuit 49 includes a fifth resistor R1 and a sixth resistor R2 connected in series. The fifth resistor R1 is also connected to the battery socket 401 and the lithium battery charging management chip 47. The connection line between the fifth resistor R1 and the sixth resistor R2 is also connected to the MCU controller 41. The structure of the external power supply charging and wake-up circuit 49 is extremely simple.

[0035] The control circuit board 4 is also provided with a headlight socket 404 and a charging indicator light group 405 that are electrically connected to the MCU controller 41. The headlight socket 404 and the charging indicator light group 405 are also both connected to the battery socket 401; An illumination lamp module 6 for external illumination is provided at the upper end of the housing 1. The illumination lamp module 6 is electrically connected to the headlight socket 404. The illumination lamp module 6 is used to provide an illumination function when the present invention is working. That is, when the cleaning head 3 contacts the teeth to clean the teeth, the illumination lamp module 6 emits light to irradiate on the teeth, thereby achieving the illumination function so that the user can clean the teeth. Among them, the illumination lamp module 6 includes an LED lamp board 61 electrically connected to the headlight socket 404, an LED provided on the LED lamp board 61, and a light guide sleeve 62 fixed to the upper end of the housing 1. The light guide sleeve 62 corresponds to the LED and is used to guide the light emitted by the LED to the outside, thereby realizing the illumination function.

[0036] To sum up, when the control circuit board 4 controls the operation of the ultrasonic transducer 2, the MCU controller 41 outputs a control signal to the drive circuit 42, and the drive circuit 42 is turned on to drive the primary winding 431 of the transformer 43 to oscillate the secondary winding 432 through the principle of electromagnetic induction, thereby driving the ultrasonic transducer 2 to work, and the ultrasonic transducer 2 outputs ultrasonic vibrations to the cleaning head 3 to achieve the purpose of controlling the operation of the cleaning head 3; since the transformer 43 is additionally provided with a feedback winding 433, the feedback winding 433 is used to detect the current load condition of the ultrasonic transducer 2, and cooperate with the MCU controller 41 to determine the pressure of the cleaning head 3, that is, to realize the pressure feedback function. When it is determined that the pressing force exceeds the set value (that is, overload), the MCU controller 41 outputs a signal to the alarm circuit 40, and the alarm circuit 40 issues an alarm to remind the user, and the user moves the cleaning head 3 outward to away from the teeth, thereby preventing the cleaning head 3 from damaging the teeth as much as possible. At the same time, the MCU controller 41 can also output a control signal to the driving circuit 42, and the driving circuit 42 is turned on to drive the primary winding 431 of the transformer 43 to control the secondary winding 432 to reduce the operating frequency of the ultrasonic transducer 2 through the principle of electromagnetic induction, thereby controlling and reducing the vibration amplitude / intensity of the cleaning head 3, so that the cleaning head 3 will not damage the teeth as much as possible, and even control the ultrasonic transducer 2 to be in standby state, thereby avoiding the cleaning head 3 from damaging the teeth.

[0037] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. The tooth cleaning control method of a tooth cleaner, characterized in that: It includes the following steps: S001: Turn on the tooth cleaner and manually set the intensity level. S002: The tooth cleaner automatically adjusts the intensity of the cleaning head to the standby value. S003: Detect whether the cleaning head touches a hard object. If a hard object is detected, go to S004; if no hard object is detected, go to S005. S004: The tooth cleaner automatically adjusts the intensity to the set level, and the cleaning head cleans the hard object accordingly. S005: Detect whether the intensity of the cleaning head pressing on the hard object is overloaded. If overload is detected, go to S006; if no overload is detected, go to S003. S006: Issue an overload alarm to prompt the user. The user then moves the cleaning head away from the hard object and simultaneously enters S002.

2. The tooth cleaning control method of the tooth cleaner according to claim 1, wherein: Inside the tooth cleaner, there are an ultrasonic transducer (2) connected to the cleaning head (3) and driving the cleaning head (3) to vibrate, a control circuit board (4) for controlling the operation of the ultrasonic transducer (2), and a battery (5) for power supply. The control circuit board (4) is provided with an MCU controller (41), a driving circuit (42) connected to the MCU controller (41) and used for the operation of the ultrasonic transducer (2), and a transformer (43) connected to the driving circuit (42). Among them, the transformer (43) includes a primary winding (431), a secondary winding (432), and a feedback winding (433). The primary winding (431) is connected to the driving circuit (42), the secondary winding (432) is connected to the transformer (43), and the feedback winding (433) is connected to a load detection circuit (44) for detecting the current load conditions of the ultrasonic transducer (2) and the cleaning head and cooperating with the MCU controller (41) to determine whether the intensity of the cleaning head (3) pressing on the hard object is overloaded. The load detection circuit (44) is connected to the MCU controller (41); the control circuit board (4) is also connected to an alarm circuit (40) for issuing an alarm when the MCU controller (41) determines that the intensity of the cleaning head (3) pressing on the hard object is overloaded.

3. The tooth cleaning control method of the tooth cleaner according to claim 2, characterized in that: The secondary winding (432) is also connected to an inductor (45) for secondary boosting, and the inductor (45) is connected to the ultrasonic transducer (2).

4. The tooth cleaning control method of the tooth cleaner according to claim 2, characterized in that: One end of the feedback winding (433) is grounded, and the other end of the feedback winding (433) is connected to the load detection circuit (44). The load detection circuit (44) includes a diode D7, a first voltage-dividing resistor R17, and a second voltage-dividing resistor R19 connected in series in sequence. The other end of the second voltage-dividing resistor R19 connected to the first voltage-dividing resistor R17 is grounded, and a first capacitor C10 is also connected in parallel across the two ends of the second voltage-dividing resistor R19. The diode D7 is connected to the other end of the feedback winding (433), and the connection line between the second voltage-dividing resistor R19 and the first voltage-dividing resistor R17 is connected to the MCU controller (41).

5. The tooth cleaning control method of the tooth cleaner according to claim 3, characterized in that: One end of the primary winding (431) is connected to the driving circuit (42), and the other end is grounded after being connected to a second capacitor C4. Moreover, the other end of the primary winding (431) is also connected to the battery.

6. The tooth cleaning control method of the tooth cleaner according to claim 2, wherein: The driving circuit (42) includes an MOS transistor (421), a first resistor R9 connected to the G pole of the MOS transistor (421), a second resistor R12 connected to the S pole of the MOS transistor (421), a third resistor R11 connected between the G pole and the S pole of the MOS transistor (421), and a third capacitor C6 connected in parallel across both ends of the first resistor R9. The D pole of the MOS transistor (421) is connected to the primary winding (431), and the first resistor R9 is connected to the MCU controller (41).

7. The tooth cleaning control method of the tooth cleaner according to claim 2, characterized in that: The driving circuit (42) is further connected to a current detection circuit (46) for cooperating with the MCU controller (41) to detect the vibration frequency of the ultrasonic transducer (2). The current detection circuit (46) is connected to the MCU controller (41). The current detection circuit (46) includes a fourth resistor R13. One end of the fourth resistor R13 is connected to the connection line between the S pole of the MOS transistor (421) and the second resistor R12, and the other end of the fourth resistor R13 is connected to the MCU controller (41).

8. The tooth cleaning control method of the tooth cleaner according to claim 2, characterized in that: The alarm circuit (40) includes a buzzer (400) or a horn for emitting a sound alarm; or, the alarm circuit (40) includes a vibration motor for emitting a vibration alarm; or, the alarm circuit (40) includes an LED lamp for emitting a light alarm.

9. The tooth cleaning control method of the tooth cleaner according to any one of claims 2-7, characterized in that: The control circuit board (4) is further provided with a lithium battery charging management chip (47), a power-on / off and gear-shifting button (48) electrically connected to the lithium battery charging management chip (47), an external power supply charging wake-up circuit (49) electrically connected to the lithium battery charging management chip (47), a battery socket (401) electrically connected to the lithium battery charging management chip (47), a charging interface (402), and a gear position indicator group (403). The lithium battery charging management chip (47), the external power supply charging wake-up circuit (49), the power-on / off and gear-shifting button (48), the battery socket (401) for connecting to the battery, and the gear position indicator group (403) are all connected to the MCU controller (41). The external power supply charging wake-up circuit (49) is further connected to the charging interface (402). The control circuit board (4) is further provided with a headlight socket (404) and a charging indicator group (405) electrically connected to the MCU controller (41). The headlight socket (404) and the charging indicator group (405) are also both connected to the battery socket (401). At the upper end of the housing (1) of the tooth cleaner, there is a lighting module (6) for external lighting, and the lighting module (6) is electrically connected to the headlight socket (404).

10. The tooth cleaning control method of the tooth cleaner according to claim 9, characterized in that: The external power supply charging wake-up circuit (49) includes a fifth resistor R1 and a sixth resistor R2 connected in series. The fifth resistor R1 is further connected to the battery socket (401) and the lithium battery charging management chip (47). The connection line between the fifth resistor R1 and the sixth resistor R2 is also connected to the MCU controller (41).

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