Electric toothbrush control apparatus, electric toothbrush, and control method

Abstract

An electric toothbrush control apparatus, an electric toothbrush, and a control method. In the control method and the control apparatus, a control module (1) is connected to a motor drive circuit (2), and the motor drive circuit (2) is connected to a motor module (3); the control module (1) responds to a mode instruction carrying a working mode, generates a motor drive signal corresponding to the working mode, and inputs the motor drive signal into the motor drive circuit (2), wherein working modes include an oscillating mode, a vibrating mode, and an oscillation-vibration mode; the motor drive circuit (2) responds to the motor drive signal to drive the motor module (3) to operate in the working mode. This solves the problem in the prior art that relying solely on high-frequency vibration for teeth cleaning easily leads to missing areas of teeth to be cleaned, resulting in incomplete teeth cleaning.

Description

Electric toothbrush control device, electric toothbrush and control method

[0001] The present application claims priority to the Chinese patent application No. 202410609004.3, filed on May 16, 2024, and entitled "Electric toothbrush control device, electric toothbrush and control method", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of toothbrushes, and in particular to an electric toothbrush control device, an electric toothbrush and a control method. BACKGROUND

[0003] The existing vibrating toothbrush generates high-frequency vibration through a vibrating motor to achieve tooth cleaning. When a user uses the vibrating electric toothbrush for a long time, the user is likely to develop a habit of not performing manual sweeping and relying only on the high-frequency vibration of the vibrating electric toothbrush to achieve tooth cleaning. However, the vibration range of the existing electric vibrating toothbrush is small, and if the vibrating electric toothbrush is used to clean teeth according to the above cleaning habit for a long time, the tooth parts that need to be cleaned are likely to be missed, causing incomplete tooth cleaning. SUMMARY

[0004] The present application provides an electric toothbrush control device, an electric toothbrush and a control method, which are used to solve the problem that the prior art only relies on high-frequency vibration to achieve tooth cleaning, which is likely to miss the tooth parts that need to be cleaned, resulting in incomplete tooth cleaning.

[0005] In one aspect, the present application provides an electric toothbrush control device, comprising: a control module, a motor driving circuit and a motor module.

[0006] The motor driving circuit is connected to the motor module.

[0007] The control module is connected to the motor driving circuit, configured to generate a motor driving signal corresponding to a working mode in response to a mode instruction carrying the working mode, and input the motor driving signal into the motor driving circuit; wherein the working mode includes a swing mode, a vibration mode and a swing-vibration mode.

[0008] The motor driving circuit is connected to the motor module, configured to drive the motor module to operate in the working mode in response to the motor driving signal.

[0009] Optionally, when the working mode is the swing mode, the control module is specifically configured to obtain a target low-frequency signal and a carrier signal, and generate a first motor driving signal according to the target low-frequency signal and the carrier signal, and input the first motor driving signal into the motor driving circuit.

[0010] The motor driving circuit is specifically configured to generate a first driving current in response to the first motor driving signal, the first driving current being used to make the rotor of the motor module swing around the balanced position with a preset first swing amplitude and a preset first swing frequency.

[0011] Optionally, when the working mode is the vibration mode, the control module is specifically configured to acquire a target high-frequency signal and the carrier signal, and generate a second motor driving signal according to the target high-frequency signal and the carrier signal, and input the second motor driving signal into the motor driving circuit.

[0012] The motor driving circuit is specifically configured to generate a second driving current in response to the second motor driving signal, the second driving current being used to make the rotor of the motor module vibrate around the balanced position with a preset first vibration amplitude and a preset first vibration frequency.

[0013] Optionally, when the working mode is the swing-vibration mode, the control module is specifically configured to acquire a target high-frequency signal, a target low-frequency signal and a carrier signal, superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor driving signal according to the target modulation signal and the carrier signal; and input the third motor driving signal into the motor driving circuit.

[0014] The motor driving circuit is specifically configured to generate a third driving current in response to the third motor driving signal, the third driving current being used to make the rotor of the motor module swing around the balanced position with the first swing amplitude and the first swing frequency, and make the rotor of the motor module vibrate around the current swing position with the first vibration amplitude and the first vibration frequency.

[0015] Optionally, the motor driving circuit comprises a direct-current power supply and an inverter circuit module.

[0016] The direct-current power supply is connected with a direct-current side of the inverter circuit module.

[0017] An alternating-current output side of the inverter circuit module is connected with a winding of the motor module.

[0018] Another aspect of the present application provides an electric toothbrush comprising the control device as described above.

[0019] Another aspect of the present application provides a control method of an electric toothbrush, comprising:

[0020] In response to the mode instruction carrying the working mode, a motor driving signal corresponding to the working mode is generated; the working mode includes a swing mode, a vibration mode and a swing-vibration mode;

[0021] The motor driving signal is input into a motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode.

[0022] Optionally, when the working mode is the swing mode, the response to the mode instruction carrying the working mode to generate the motor driving signal corresponding to the working mode includes:

[0023] The target low-frequency signal and the carrier signal are obtained, and a first motor driving signal is generated according to the target low-frequency signal and the carrier signal,

[0024] The motor driving signal is input into a motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode.

[0025] The first motor driving signal is input into the motor driving circuit; the motor driving circuit generates a first driving current in response to the first motor driving signal, and the first driving current is used to make the rotor of the motor module swing around the balance position with a preset first swing amplitude and a preset first swing frequency.

[0026] Optionally, when the working mode is the vibration mode, the response to the mode instruction carrying the working mode to generate the motor driving signal corresponding to the working mode includes:

[0027] The target high-frequency signal and the carrier signal are obtained, and a second motor driving signal is generated according to the target high-frequency signal and the carrier signal;

[0028] The motor driving signal is input into a motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode.

[0029] The second motor driving signal is input into the motor driving circuit, so that the motor driving circuit generates a second driving current in response to the second motor driving signal, and the second driving current is used to make the rotor of the motor module vibrate around the balance position with a preset first vibration amplitude and a preset first vibration frequency.

[0030] Optionally, when the working mode is the swing-vibration mode, the response to the mode instruction carrying the working mode to generate the motor driving signal corresponding to the working mode includes:

[0031] The target high-frequency signal, the target low-frequency signal and the carrier signal are acquired, the target high-frequency signal and the target low-frequency signal are superimposed to obtain a target modulation signal, and a third motor driving signal is generated according to the target modulation signal and the carrier signal;

[0032] The motor driving signal is input into the motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode, and specifically includes the following steps:

[0033] The third motor driving signal is input into the motor driving circuit, so that the motor driving circuit generates a third driving current in response to the third motor driving signal, the third driving current is used for making the rotor of the motor module swing around the balance position at the first swing amplitude and the first swing frequency, and simultaneously making the rotor of the motor module vibrate around the current swing position at the first vibration amplitude and the first vibration frequency.

[0034] From the above technical solutions, the present application has the following advantages:

[0035] The present application provides an electric toothbrush control device, comprising: a control module, a motor driving circuit and a motor module; the motor driving circuit is connected with the motor module; the control module is connected with the motor driving circuit, and is used for generating a motor driving signal corresponding to a working mode in response to a mode instruction carrying the working mode, and inputting the motor driving signal into the motor driving circuit; the working mode includes a swing mode, a vibration mode and a swing-vibration mode; the motor driving circuit is connected with the motor module, and is used for driving the motor module to operate in the working mode in response to the motor driving signal.

[0036] In the present application, the control module is connected with the motor driving circuit, and is used for generating a motor driving signal corresponding to a working mode in response to a mode instruction carrying the working mode, and inputting the motor driving signal into the motor driving circuit, so that a motor driving signal for controlling different working modes of the motor module is obtained; the motor driving circuit is connected with the motor module, and is used for driving the motor module to operate in the working mode in response to the motor driving signal, wherein the working mode of the motor module of the present application includes a swing mode, a vibration mode and a swing-vibration mode, therefore, the present application can generate different motor driving signals of different working modes, and realizes the adjustment and switching of the working mode of the motor module, so as to provide a plurality of rich function modes for the user, and the user can switch the function mode according to the actual demand during use, so as to fully and comprehensively clean the teeth, and avoid the problem that the prior art only relies on high-frequency vibration to clean the teeth, and the teeth part to be cleaned is easily missed, resulting in incomplete tooth cleaning.

[0037] The application further provides a control method of the electric toothbrush, which comprises the following steps: generating a motor driving signal corresponding to a working mode in response to a mode instruction carrying the working mode; the working mode comprises a swing mode, a vibration mode and a swing-vibration mode; and inputting the motor driving signal into a motor driving circuit to drive the motor module to operate in the working mode, so as to solve the problem that the prior art only relies on high-frequency vibration to realize tooth cleaning, which is easy to miss the tooth parts to be cleaned and leads to incomplete tooth cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Fig. 1 is a structural schematic diagram of an electric toothbrush control device provided by an embodiment of the present application;

[0040] Fig. 2 is a two-dimensional cross-sectional structural schematic diagram of a motor module provided by an embodiment of the present application;

[0041] Fig. 3 is a structural schematic diagram of a motor driving circuit provided by an embodiment of the present application;

[0042] Fig. 4 is a waveform schematic diagram of a motor driving signal provided by an embodiment of the present application;

[0043] Fig. 5 is a waveform schematic diagram of a target high-frequency signal and a target low-frequency signal superimposed provided by an embodiment of the present application;

[0044] Fig. 6 is a waveform schematic diagram of a driving current provided by an embodiment of the present application;

[0045] Fig. 7 is a two-dimensional cross-sectional structural schematic diagram of a motor module provided by an embodiment of the present application;

[0046] Fig. 8 is a two-dimensional cross-sectional structural schematic diagram of a motor module provided by an embodiment of the present application;

[0047] Fig. 9 is an operation flow schematic diagram of an electric toothbrush control device provided by an embodiment of the present application;

[0048] Fig. 10 is a step flow chart of an electric toothbrush control method provided by an embodiment of the present application. DETAILED DESCRIPTION

[0049] The embodiment of the present application provides an electric toothbrush control device, an electric toothbrush and a control method, and aims at solving the problem that the prior art only relies on high-frequency vibration to realize tooth cleaning, and the tooth cleaning is not comprehensive because the tooth parts to be cleaned are easily missed.

[0050] In order to make the application purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0051] Please refer to Fig. 1, the present application provides an electric toothbrush control device, comprising: a control module 1, a motor driving circuit 2, a motor module 3; the motor driving circuit 2 is connected with the motor module 3; the control module 1 is connected with the motor driving circuit 2, for generating the motor driving signal corresponding to the working mode in response to the mode instruction carrying the working mode, and inputting the motor driving signal into the motor driving circuit 2; wherein, the working mode includes swing mode, vibration mode and swing-vibration mode; the motor driving circuit 2 is connected with the motor module 3, for driving the motor module 3 to run in the working mode in response to the motor driving signal.

[0052] It should be noted that the swing mode refers to that the motor module 3 swings at a preset first swing amplitude and a preset first swing frequency; the vibration mode refers to that the motor module 3 vibrates at a preset first vibration amplitude and a preset first vibration frequency. The swing-vibration mode refers to that the motor module 3 swings at the first swing amplitude and the first swing frequency, and vibrates at the first vibration amplitude and the first vibration frequency at the same time. The relationship of the above three working modes is "or". The motor module 3 is used to drive the brush head of the electric toothbrush to move correspondingly, and it can be understood that the movement of the brush head is consistent with the movement of the motor module 3.

[0053] In actual application, the working principle of the present embodiment is as follows:

[0054] The user inputs the mode instruction carrying the working mode to the control module 1, the control module 1 receives the mode instruction, analyzes the mode instruction, obtains the corresponding working mode, wherein the working mode includes swing mode, vibration mode and swing-vibration mode, then the control module 1 generates the motor driving signal corresponding to the working mode, such as the motor driving signal of the swing mode, the motor driving signal corresponding to the vibration mode, the motor driving signal corresponding to the swing-vibration mode, and inputs the corresponding motor driving signal into the motor driving circuit 2, the motor driving circuit 2 responds to the motor driving signal after receiving the motor driving signal, and controls the motor module 3 to run in the corresponding working mode, to realize the cleaning of the teeth.

[0055] For example, when the received motor driving signal is the motor driving signal corresponding to the swing mode, the motor driving circuit 2 controls the motor module 3 to operate in the swing mode, so that the brush head of the electric toothbrush swings at the first swing amplitude and the first swing frequency, and vibrates at the first vibration amplitude and the first vibration frequency, so that the brush head of the electric toothbrush swings at the preset first swing amplitude and swing frequency to simulate the user's manual swing, increase the cleaning area, and also vibrate at the preset first vibration amplitude and first vibration frequency to enhance the cleaning strength, thereby improving the cleanliness of the tooth parts to be cleaned, and avoiding the problem that the existing vibration type electric toothbrush is difficult to simulate the user's manual brushing action due to the small vibration interval, resulting in incomplete cleaning of the tooth parts.

[0056] In the embodiment, the control module 1 is connected with the motor driving circuit 2, and is used to generate the motor driving signal corresponding to the working mode in response to the mode instruction carrying the working mode, and input the motor driving signal into the motor driving circuit 2, so as to obtain the motor driving signal for controlling different working modes of the motor module 3; the motor driving circuit 2 is connected with the motor module 3, and is used to drive the motor module 3 to operate in the working mode in response to the motor driving signal, so as to realize the adjustment of the working mode of the motor module 3. In the application, the working mode of the motor module 3 includes the swing mode, the vibration mode and the swing mode, so that the user is provided with a variety of rich use modes, and the working mode of the motor module 3 can be switched according to the user's demand, thereby avoiding the problem that the prior art only relies on high-frequency vibration to realize tooth cleaning, which is easy to miss the tooth parts to be cleaned, resulting in incomplete cleaning of the teeth, and the operation is simple, the learning cost of the user is reduced, the use threshold of the user is reduced, and the use experience of the user is improved.

[0057] It should be noted that the motor module in the application can be a motor containing a pair of pole structures, as an example, for example: the structure of the motor module 3 can be a limited angle motor structure as shown in FIG. 2, as shown in FIG. 2, the motor module 3 can include an integrally formed stator core 11;

[0058] The two sides of the stator core 11 are respectively provided with a stator left tooth winding 12 and a stator right tooth winding 17;

[0059] The middle part of the stator core 11 is provided with a motor rotor 14;

[0060] The middle part of the motor rotor 14 is provided with a rotating shaft 15;

[0061] The circumference of the motor rotor 14 is provided with a first rotor permanent magnet 13 and a second rotor permanent magnet 16;

[0062] The stator left tooth winding 12 and the stator right tooth winding 17 are connected in series and connected to the AC output side of the motor driving circuit 2.

[0063] In FIG. 2, the stator left tooth winding 12 and the stator right tooth winding 17 are both single-phase windings, and they are connected in series in the iron cores on both sides. Therefore, the current directions of the stator left tooth winding 12 and the stator right tooth winding 17 are the same. The first rotor permanent magnet 13 and the second rotor permanent magnet 16 are fixedly connected to the rotor 14 by strong adhesive.

[0064] The working principle is as follows:

[0065] The motor driving circuit 2 outputs corresponding driving currents to the stator left tooth winding 12 and the stator right tooth winding 17 in response to the motor driving signal, so that the motor rotor 14 moves according to the corresponding working mode under the action of the first rotor permanent magnet 13 and the second rotor permanent magnet 16.

[0066] The motor module 3 with the above structure is adopted in the embodiment, the control mode of the driving motor is simplified, the driving mode of the motor module 3 is more convenient, and the problems of the existing sweep vibration type electric toothbrush, such as complex control mode, high requirements for the motor and driving hardware, high production cost, and lower reliability compared with the vibration type toothbrush, are avoided.

[0067] In a specific embodiment, the magnetization direction of the first rotor permanent magnet 13 is towards the outside of the motor rotor 14, and the magnetization direction of the second rotor permanent magnet 16 is towards the inside of the motor rotor 14.

[0068] It should be noted that, as shown in FIG. 2, the number of the first rotor permanent magnet 13 can be 2, and the number of the second rotor permanent magnet 16 can be 2. The arrangement mode of the first rotor permanent magnet 13 and the second rotor permanent magnet 16 is N-N-S-S. For example, in FIG. 2, the end of the first rotor permanent magnet 13 close to the inside of the rotor is N-pole, and the end of the second rotor permanent magnet 16 close to the inside of the rotor is S-pole. It can be understood that the magnetization direction of all the first rotor permanent magnets 13 is towards the outside of the motor rotor 14, and the magnetization direction of all the second rotor permanent magnets 16 is towards the inside of the motor rotor 14.

[0069] Specifically, the magnetization mode of the first rotor permanent magnet 13 and the second rotor permanent magnet 16 includes parallel magnetization.

[0070] It can be understood that the motor structure shown in FIG. 2 is only used to specifically describe one embodiment of the motor module 3 proposed in the present application, and is not limited to this type of motor. The control principle of the control module 1 of the present application is applicable to motors with similar motor structures to the limited rotation angle motor structure shown in FIG. 2.

[0071] In one specific embodiment, the motor driving circuit 2 comprises a direct current power supply 18 and an inverter circuit module;

[0072] The direct current power supply 18 is connected with the direct current side of the inverter circuit module.

[0073] The alternating current output side of the inverter circuit module is connected with the winding of the motor module 3.

[0074] It should be noted that the direct current power supply 18 is used to provide direct current power. In the present embodiment, the inverter circuit module can adopt a single-phase full-bridge inverter driving circuit, as shown in FIG. 3. The driving circuit is an H-bridge driving circuit, comprising a first bridge arm switch tube 19, a second bridge arm switch tube 101, a third bridge arm switch tube 102 and a fourth bridge arm switch tube 103. The first bridge arm switch tube 19, the second bridge arm switch tube 101, the third bridge arm switch tube 102 and the fourth bridge arm switch tube 103 are all connected with reverse diodes, which are used to ensure normal freewheeling.

[0075] The connection between the first bridge arm switch tube 19 and the third bridge arm switch tube 102 is connected with the winding 100 of the motor module 3, and the connection between the second bridge arm switch tube 101 and the fourth bridge arm switch tube 103 is connected with the winding 100 of the motor module 3. When the motor module 3 adopts the motor structure as shown in FIG. 2, the winding 100 comprises the stator left tooth winding 12 and the stator right tooth winding 17.

[0076] The working principle of the present embodiment is as follows:

[0077] The control module 1 outputs motor driving signals to the first bridge arm switch tube 19, the second bridge arm switch tube 101, the third bridge arm switch tube 102 and the fourth bridge arm switch tube 103, so as to adjust the on and off states of the first bridge arm switch tube 19, the second bridge arm switch tube 101, the third bridge arm switch tube 102 and the fourth bridge arm switch tube 103. The change of the on and off states of the first bridge arm switch tube 19, the second bridge arm switch tube 101, the third bridge arm switch tube 102 and the fourth bridge arm switch tube 103 will cause the voltage change at both ends of the winding 100 of the motor module 3, so as to cause the current change of the winding 100 of the motor module 3, and then cause the rotor of the motor module 3 to move correspondingly with the changing driving current waveform, so that the motor module 3 can operate in the corresponding working mode.

[0078] The relationship between the on and off states of the first bridge arm switch tube 19, the second bridge arm switch tube 101, the third bridge arm switch tube 102 and the fourth bridge arm switch tube 103 is that the first bridge arm switch tube 19 and the third bridge arm switch tube 102 are simultaneously turned on and off, and the second bridge arm switch tube 101 and the fourth bridge arm switch tube 103 are simultaneously turned on and off.

[0079] In one specific embodiment, the motor driving signals include a first motor driving signal, a second motor driving signal and a third motor driving signal.

[0080] The swing mode corresponds to the first motor driving signal, the vibration mode corresponds to the second motor driving signal, and the swing vibration mode corresponds to the third motor driving signal. The first motor driving signal, the second motor driving signal and the third motor driving signal can be PWM signals.

[0081] In one specific embodiment, when the working mode is the swing mode, the control module 1 is specifically configured to obtain a target low-frequency signal and a carrier signal, and generate the first motor driving signal according to the target low-frequency signal and the carrier signal, and input the first motor driving signal into the motor driving circuit 2.

[0082] The motor driving circuit 2 is specifically configured to generate a first driving current in response to the first motor driving signal, and the first driving current is used to make the rotor of the motor module 3 swing around the balance position with a preset first swing amplitude and a preset first swing frequency.

[0083] It should be noted that the target low-frequency signal can be obtained by the control chip of the control module 1 through table lookup. The carrier signal can be a high-frequency triangular carrier signal. The high-frequency triangular carrier signal can be provided by the counter in the center alignment mode of the control chip of the control module 1. Therefore, this embodiment does not need an external signal source, which reduces the cost of the device. When the motor module 3 adopts the motor structure as shown in FIG. 2, the rotor of the motor module 3 is the motor rotor 14.

[0084] Taking the motor structure shown in FIG. 2 as an example, the working principle of this embodiment is described as follows:

[0085] In this embodiment, the control module 1 generates the first motor driving signal according to the target low-frequency signal and the carrier signal. The process can be that a preset modulation method is adopted, the target low-frequency signal is taken as a modulation signal, the target low-frequency signal and the carrier signal are modulated to obtain a PWM signal, so as to adjust the on-off state of the first bridge arm switch tube 19, the second bridge arm switch tube 101, the third bridge arm switch tube 102 and the fourth bridge arm switch tube 103 through the PWM signal, change the voltage across the winding 100, thereby changing the current (i.e. the first driving current) of the winding 100, so that the motor rotor 14 swings according to the first swing amplitude and the first swing frequency under the action of the magnetic field formed by the first rotor permanent magnet 13 and the second rotor permanent magnet 16.

[0086] The values of the first swing amplitude and the first swing frequency can be set according to actual requirements, and the values of the first swing amplitude and the first swing frequency can be adjusted by adjusting the amplitude and frequency of the modulation signal to reach the actual required values.

[0087] In one example, the example takes the SPWM modulation method and the sine wave signal as the modulation signal for example, as shown in FIG. 4, 104 is a sine wave modulation signal, 105 is a high-frequency triangular carrier signal, 106 and 107 are generated PWM signals, S1 and S4 correspond to the first bridge arm switch tube 19 and the third bridge arm switch tube 102 respectively, S2 and S3 correspond to the second bridge arm switch tube 101 and the fourth bridge arm switch tube 103 respectively. When the value of the modulation signal 104 is higher than the high-frequency triangular carrier signal 105, the PWM output is high, and the corresponding switch tube is turned on. As can be seen from FIG. 4, when the modulation signal 104 is greater than 0, the corresponding PWM signal 106 controls the on-off state of the first bridge arm switch tube 19 and the third bridge arm switch tube 102; when the modulation signal 104 is less than 0, the PWM signal 107 controls the on-off state of the second bridge arm switch tube 101 and the fourth bridge arm switch tube 103. According to the principle of pulse width modulation, the on-off state of the first bridge arm switch tube 19, the second bridge arm switch tube 101, the third bridge arm switch tube 102 and the fourth bridge arm switch tube 103 changes, which causes the voltage signal generated across the winding 100 to change, and the voltage change across the winding 100 causes the current to change. At this time, the current waveform of the winding 100 is equivalent to the waveform of the modulation signal 104, and the current waveform of the winding 100 is the first motor driving current. Therefore, the change of the current of the winding 100 makes the motor rotor 14 swing around the balance position with a preset first swing amplitude and a preset first swing frequency

[0088] Therefore, the embodiment can obtain first motor driving currents with different amplitudes and frequencies by adjusting the amplitude and frequency of the modulation signal 104.

[0089] When the working mode is the vibration mode, the control module 1 is specifically configured to obtain a target high-frequency signal and a carrier signal, and generate a second motor driving signal according to the target high-frequency signal and the carrier signal, and input the second motor driving signal into the motor driving circuit 2.

[0090] The motor driving circuit 2 is specifically configured to generate a second driving current in response to the second motor driving signal, and the second driving current is used to make the rotor of the motor module 3 vibrate around the balance position with a preset first vibration amplitude and a preset first vibration frequency.

[0091] It should be noted that the target high-frequency signal can be obtained by the control chip of the control module 1 through table lookup.

[0092] Taking the motor structure shown in FIG. 2 as an example, the working principle of the embodiment is described as follows:

[0093] The process of the control module 1 generating the first motor driving signal according to the target high-frequency signal and the carrier signal can be using a preset modulation method, taking the target high-frequency signal as a modulation signal, modulating the target high-frequency signal and the carrier signal to obtain a PWM signal, so as to adjust the on and off states of the first bridge arm switch tube 19, the second bridge arm switch tube 101, the third bridge arm switch tube 102 and the fourth bridge arm switch tube 103 through the PWM signal, change the voltage across the winding 100, thereby changing the current (i.e. the second driving current) of the winding 100, and under the action of the magnetic field built by the first rotor permanent magnet 13 and the second rotor permanent magnet 16, the motor rotor 14 vibrates at the first vibration amplitude and the first vibration frequency.

[0094] The generation principle of the second driving current is similar to that of the first motor driving signal, and details can be referred to the foregoing description, which will not be repeated here.

[0095] The values of the first vibration amplitude and the first vibration frequency can be set according to actual needs, and the values of the first vibration amplitude and the first vibration frequency can be adjusted by adjusting the amplitude and frequency of the modulation signal to reach the actual required values.

[0096] In a specific embodiment, when the working mode is the swing-vibration mode, the control module 1 is specifically configured to obtain the target high-frequency signal, the target low-frequency signal and the carrier signal, superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor driving signal according to the target modulation signal and the carrier signal; and input the third motor driving signal into the motor driving circuit 2.

[0097] The motor driving circuit 2 is specifically configured to generate a third driving current in response to the third motor driving signal, the third driving current being used to make the rotor of the motor module 3 swing at the first swing amplitude and the first swing frequency with the balance position as the center, and simultaneously make the rotor of the motor module 3 vibrate at the first vibration amplitude and the first vibration frequency with the current swing position as the center.

[0098] It should be noted that in the embodiment, when the working mode is the swing-vibration mode, the rotor of the motor module 3 simultaneously swings and vibrates, thereby simulating the user's manual sweeping of the cleaning area, improving the cleaning degree of the teeth and expanding the cleaning area. Since the position of the rotor of the motor module 3 changes during the swing, the motor module 3 in the embodiment vibrates with the real-time swing position of the rotor as the center, so the current swing position refers to the position of the motor rotor 14 obtained in real time.

[0099] Taking the motor structure shown in FIG. 2 as an example, the working principle of the embodiment is described as follows:

[0100] When the working mode is the swing mode, the control module 1 superimposes the target high-frequency signal and the target low-frequency signal based on the preset modulation method to obtain a target modulation signal, and modulates the target modulation signal with a high-frequency carrier signal by using the preset modulation method to obtain a PWM signal, at this time, the PWM signal is the third motor driving signal, then the third driving signal is input into each switch tube in the motor driving circuit 2, and each switch tube is turned on and off, so as to change the current of the winding 100, at this time, the current of the winding 100 is the third driving current, and according to the principle of pulse width modulation, the waveform of the third driving current is consistent with the waveform of the target modulation signal, which is also the superposition of the high-frequency current signal and the low-frequency current signal, so under the action of the third driving current and the magnetic field of the first rotor permanent magnet 13 and the second rotor permanent magnet 16, the motor rotor 14 swings around the balance position with the first swing amplitude and the first swing frequency, and vibrates around the current swing position with the first vibration amplitude and the first vibration frequency.

[0101] In one example, the superimposed waveform of the target high-frequency signal and the target low-frequency signal is shown in FIG. 5.

[0102] In one example, the preset modulation method can use, but is not limited to, SPWM, SVPWM, DPWM and other modulation methods that can modulate high-frequency signals and low-frequency signals and can generate signals modulated by superimposing high-frequency signals and low-frequency signals.

[0103] In one example, the target high-frequency signal and the target low-frequency signal can use, but are not limited to, sine waves, sawtooth waves and steamed buns waves. The frequencies of the target high-frequency signal and the target low-frequency signal can be selected according to actual conditions.

[0104] Taking the example that both the target high-frequency signal and the target low-frequency signal are sine waves and the working mode is the swing mode, as shown in FIG. 5, 108 is the target high-frequency signal, 109 is the target low-frequency signal, and the superimposed signal acts on the motor driving circuit 2 to generate a driving current on the winding 100 of the motor, as shown by 110 in FIG. 6.

[0105] In order to more clearly illustrate the wide applicability of the motor module of the present application, two examples of the motor module are added below for illustration.

[0106] Example one:

[0107] The motor module 3 can use a motor structure different from that shown in FIG. 2, as shown in FIG. 7, which can specifically include a stator first permanent magnet 111, a stator second permanent magnet 112, a stator third permanent magnet 113, a stator fourth permanent magnet 114, a motor housing 115, an internal support structure 116, a motor rotor 117, a rotor first winding 118 and a rotor second winding 119.

[0108] In Example One, the winding 100 of the motor module 3 shown in FIG. 3 is the rotor first winding 118 and the rotor second winding 119. The rotor of the motor module 3 is the motor rotor 117, wherein the stator first permanent magnet 111, the stator second permanent magnet 113, and the stator fourth permanent magnet 114 are used to build the magnetic field environment inside the motor, which has a similar effect to that of the first rotor permanent magnet 13 and the second rotor permanent magnet 16 shown in FIG. 2.

[0109] The new control method proposed by the present application in this example is as follows:

[0110] When the working mode is the swing mode, the control module 1 is specifically configured to obtain a target low-frequency signal and a carrier signal, and generate a first motor driving signal according to the target low-frequency signal and the carrier signal, and input the first motor driving signal into the motor driving circuit 2.

[0111] The motor driving circuit 2 is specifically configured to generate a first driving current in response to the first motor driving signal, and the first driving current is used to make the motor rotor 117 swing around the balance position with a preset first swing amplitude and a preset first swing frequency.

[0112] When the working mode is the vibration mode, the control module 1 is specifically configured to obtain a target high-frequency signal and a carrier signal, and generate a second motor driving signal according to the target high-frequency signal and the carrier signal, and input the second motor driving signal into the motor driving circuit 2.

[0113] The motor driving circuit 2 is specifically configured to generate a second driving current in response to the second motor driving signal, and the second driving current is used to make the motor rotor 117 vibrate around the balance position with a preset first vibration amplitude and a preset first vibration frequency.

[0114] When the working mode is the swing-vibration mode, the control module 1 is specifically configured to obtain a target high-frequency signal, a target low-frequency signal, and a carrier signal, superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor driving signal according to the target modulation signal and the carrier signal; and input the third motor driving signal into the motor driving circuit 2.

[0115] The motor driving circuit 2 is specifically configured to generate a third driving current in response to the third motor driving signal, and the third driving current is used to make the motor rotor 117 swing around the balance position with a first swing amplitude and a first swing frequency, and simultaneously make the motor rotor 117 vibrate around the current swing position with a first vibration amplitude and a first vibration frequency.

[0116] It can be understood that the working principles of the swing mode, the vibration mode and the swing-vibration mode in Example One can refer to the foregoing embodiments, which will not be described herein again.

[0117] Example Two

[0118] The motor module 3 can adopt a motor structure different from that shown in FIG. 2, as shown in FIG. 8, which can specifically include: a stator 120, a first stator winding 121, a second stator winding 122, a first permanent magnet 123, a second permanent magnet 124, a third permanent magnet 125, a fourth permanent magnet 126, and a motor rotor 127.

[0119] In Example Two, the winding 100 of the motor module 3 shown in FIG. 3 is the first stator winding 121 and the second stator winding 122. The rotor of the motor module 3 is the motor rotor 127, wherein the stator first permanent magnet 111, the stator second permanent magnet 113, and the stator fourth permanent magnet 114 are used to build the magnetic field environment inside the motor, which has a similar effect to that of the first rotor permanent magnet 13 and the second rotor permanent magnet 16 shown in FIG. 2.

[0120] The new control method proposed by the application in this example has the following flow:

[0121] When the working mode is the swing mode, the control module 1 is specifically configured to obtain a target low-frequency signal and a carrier signal, generate a first motor driving signal according to the target low-frequency signal and the carrier signal, and input the first motor driving signal into the motor driving circuit 2.

[0122] The motor driving circuit 2 is specifically configured to generate a first driving current in response to the first motor driving signal, so that the motor rotor 127 swings with a preset first swing amplitude and a preset first swing frequency with the balance position as the center.

[0123] When the working mode is the vibration mode, the control module 1 is specifically configured to obtain a target high-frequency signal and a carrier signal, generate a second motor driving signal according to the target high-frequency signal and the carrier signal, and input the second motor driving signal into the motor driving circuit 2.

[0124] The motor driving circuit 2 is specifically configured to generate a second driving current in response to the second motor driving signal, so that the motor rotor 127 vibrates with a preset first vibration amplitude and a preset first vibration frequency with the balance position as the center.

[0125] When the working mode is the wobble mode, the control module 1 is specifically configured to acquire a target high-frequency signal, a target low-frequency signal and a carrier signal, superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor driving signal according to the target modulation signal and the carrier signal; and input the third motor driving signal into the motor driving circuit 2.

[0126] The motor driving circuit 2 is specifically configured to generate a third driving current in response to the third motor driving signal, and the third driving current is used to make the motor rotor 127 swing around the balance position with a first swing amplitude and a first swing frequency, and simultaneously make the motor rotor 127 vibrate around the current swing position with a first vibration amplitude and a first vibration frequency.

[0127] It can be understood that in Example Two, the control principles of the wobble mode, the vibration mode and the wobble mode can refer to the foregoing embodiments, and will not be described here.

[0128] It should be emphasized that the motor structures listed in FIGS. 2, 7 and 8 are only exemplary descriptions of the control principles of the control device provided by the present application, and are not used to limit the structure of the motor module 3 of the present application. The motor module 3 in the embodiments of the present application is not limited to the motor with the structure shown in FIGS. 2, 7 and 8, but can be all motors with a pair of pole structures, or similar motors with the structures shown in FIGS. 2, 7 and 8, etc.

[0129] In a specific embodiment, in a normal working state, if the power is normally cut off, the rotor of the motor module 3 will automatically return to the balance position, and the whole process does not need to be positioned again.

[0130] In an actual application example, the operation process of the embodiment of the present application is shown in FIG. 9.

[0131] S100: The motor module 3 is powered on and is in a standby state.

[0132] S101: Receive the motion mode input by the user, wherein the motion mode includes a wobble working mode, a vibration working mode and a wobble working mode.

[0133] S102: When the motion mode is input to the control chip of the control module 1, the control chip generates a start signal.

[0134] S103: The control chip generates a modulation signal waveform 104 corresponding to the motion mode and a carrier signal 105, and generates and outputs a PWM control signal according to the modulation signal waveform and the carrier signal.

[0135] S104: The motor driving circuit 2 receives the PWM control signal, controls the on-off of the bridge arm switch tube in the inverter circuit module, thereby generating driving current in the motor winding, and enabling the motor rotor 14 to realize corresponding movement.

[0136] S105: When receiving the stop signal input by the user, S106 is executed.

[0137] S106: The control chip stops outputting the PWM control signal, and step S107 is executed.

[0138] S107: Turn off all bridge arm switch tubes in the motor driving circuit 2, and jump to S100 to make the motor return to the standby state.

[0139] The embodiment of the application also provides a control device for an electric toothbrush.

[0140] Please refer to FIG. 10, the embodiment of the application also provides a control method for an electric toothbrush, which is not limited to the three structures of the motor shown in FIG. 2, FIG. 7 and FIG. 8, and can be applied to all motors with one pair of poles, and can also be applied to motors similar to the structures shown in FIG. 2, FIG. 7 and FIG. 8.

[0141] The control method comprises the following steps:

[0142] 201: In response to a mode instruction carrying a working mode, a motor driving signal corresponding to the working mode is generated; the working mode comprises a swing mode, a vibration mode and a swing-vibration mode;

[0143] 202: The motor driving signal is input into a motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode.

[0144] The embodiment generates a motor driving signal corresponding to the working mode in response to a mode instruction carrying the working mode, inputs the motor driving signal into the motor driving circuit, and enables the motor driving circuit to drive the motor module to operate in the working mode, thereby solving the problem in the prior art that only high-frequency vibration is used to realize tooth cleaning, and some parts of teeth to be cleaned are easily missed, resulting in incomplete tooth cleaning.

[0145] In a specific embodiment, when the working mode is the swing mode, step 201 specifically comprises:

[0146] The target low-frequency signal and the carrier signal are obtained, and a first motor driving signal is generated according to the target low-frequency signal and the carrier signal.

[0147] Step 202 specifically comprises:

[0148] The first motor driving signal is input into the motor driving circuit, so that the motor driving circuit generates a first driving current, and the first driving current is used to make the rotor of the motor module swing around the balance position with a preset first swing amplitude and a preset first swing frequency.

[0149] In one specific embodiment, when the working mode is the swing mode, step 201 specifically includes:

[0150] The target high-frequency signal and the carrier signal are obtained, and a second motor driving signal is generated according to the target high-frequency signal and the carrier signal,

[0151] Step 202 specifically includes:

[0152] The second motor driving signal is input into the motor driving circuit, so that the motor driving circuit generates a second driving current, and the second driving current is used to make the rotor of the motor module vibrate around the balance position with a preset first vibration amplitude and a preset first vibration frequency.

[0153] In one specific embodiment, when the working mode is the swing-vibration mode, step 201 specifically includes:

[0154] The target high-frequency signal, the target low-frequency signal and the carrier signal are obtained, the target high-frequency signal and the target low-frequency signal are superimposed to obtain a target modulation signal, and a third motor driving signal is generated according to the target modulation signal and the carrier signal;

[0155] Step 202 specifically includes:

[0156] The third motor driving signal is input into the motor driving circuit, so that the motor driving circuit generates a third driving current, and the third driving current is used to make the rotor of the motor module swing around the balance position with a first swing amplitude and a first swing frequency, and simultaneously make the rotor of the motor module vibrate around the current swing position with a first vibration amplitude and a first vibration frequency.

[0157] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0158] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely illustrative. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, or the among different units, can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0159] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0160] In addition, each functional unit in the various embodiments of the present application can be integrated into one processing unit, or each functional unit can be a separate physical unit, or two or more functional units can be integrated into one processing unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0161] When the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that makes a contribution to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program codes that can be stored in the medium.

[0162] The terms "first", "second", "third", "fourth" and the like in the description of this application and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is to be construed to cover the embodiments of the application whether or not the embodiments are described using the same term. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the application. Unless otherwise defined, all terms used in the description of the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the description of the application should not be interpreted to be limiting in nature. Specifically, the use of the terms "including", "containing", "comprising", "having" and variations thereof herein are intended to be broad and encompass the presence of a stated feature, step, element, component, article, material or the like, but do not preclude the presence or addition of one or more other features, steps, elements, components, articles, materials or the like.

[0163] It should also be noted that in the description of the application, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0164] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A control device for an electric toothbrush, characterized by comprising: Comprise: A control module, a motor drive circuit, a motor module; The motor drive circuit is connected with the motor module; The control module is connected with the motor drive circuit, and is used for generating a motor drive signal corresponding to the working mode in response to a mode instruction carrying a working mode, and inputting the motor drive signal into the motor drive circuit; wherein the working mode comprises a swing mode, a vibration mode and a swing vibration mode; The motor drive circuit is connected with the motor module, and is used for driving the motor module to operate in the working mode in response to the motor drive signal.

2. The control device according to claim 1, characterized by When the working mode is the swing mode, the control module is specifically used for acquiring a target low-frequency signal and a carrier signal, and generating a first motor drive signal according to the target low-frequency signal and the carrier signal, and inputting the first motor drive signal into the motor drive circuit; The motor drive circuit is specifically used for generating a first drive current in response to the first motor drive signal, and the first drive current is used for making the rotor of the motor module swing with a balance position as the center and with a preset first swing amplitude and a preset first swing frequency.

3. The control device of claim 2, wherein When the working mode is the vibration mode, the control module is specifically used for acquiring a target high-frequency signal and the carrier signal, and generating a second motor drive signal according to the target high-frequency signal and the carrier signal, and inputting the second motor drive signal into the motor drive circuit; The motor drive circuit is specifically used for generating a second drive current in response to the second motor drive signal, and the second drive current is used for making the rotor of the motor module vibrate with a balance position as the center and with a preset first vibration amplitude and a preset first vibration frequency.

4. The control device of claim 3, wherein When the working mode is the swing vibration mode, the control module is specifically used for acquiring a target high-frequency signal, a target low-frequency signal and a carrier signal, superimposing the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generating a third motor drive signal according to the target modulation signal and the carrier signal; and inputting the third motor drive signal into the motor drive circuit; The motor drive circuit is specifically used for generating a third drive current in response to the third motor drive signal, and the third drive current is used for making the rotor of the motor module swing with a balance position as the center and with the first swing amplitude and the first swing frequency, and making the rotor of the motor module vibrate with a current swing position as the center and with the first vibration amplitude and the first vibration frequency.

5. The control device of claim 1, wherein The motor drive circuit comprises a direct-current power supply and an inverter circuit module; The direct-current power supply is connected with the direct-current side of the inverter circuit module; The alternating-current output side of the inverter circuit module is connected with the winding of the motor module.

6. An electric toothbrush characterized by comprising: The control device comprises any one of claims 1-8.

7. A control method of an electric toothbrush, characterized by, The device comprises any one of claims 1-8, comprising: Generating a motor drive signal corresponding to the working mode in response to a mode instruction carrying a working mode; the working mode comprises a swing mode, a vibration mode and a swing vibration mode; The motor driving signal is input into a motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode.

8. The control method according to claim 7, characterized by When the working mode is the swing mode, the response to the mode instruction carrying the working mode generates the motor driving signal corresponding to the working mode, including: The target low-frequency signal and the carrier signal are acquired, and a first motor driving signal is generated according to the target low-frequency signal and the carrier signal, The motor driving signal is input into a motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode. The first motor driving signal is input into the motor driving circuit; the motor driving circuit generates a first driving current in response to the first motor driving signal, and the first driving current is used to make the rotor of the motor module swing around the balance position with a preset first swing amplitude and a preset first swing frequency.

9. The control method according to claim 8, characterized by, When the working mode is the vibration mode, the response to the mode instruction carrying the working mode generates the motor driving signal corresponding to the working mode, including: The target high-frequency signal and the carrier signal are acquired, and a second motor driving signal is generated according to the target high-frequency signal and the carrier signal; The motor driving signal is input into a motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode. The second motor driving signal is input into the motor driving circuit, so that the motor driving circuit generates a second driving current in response to the second motor driving signal, and the second driving current is used to make the rotor of the motor module vibrate around the balance position with a preset first vibration amplitude and a preset first vibration frequency.

10. The control method according to claim 8, characterized by, When the working mode is the swing mode, the response to the mode instruction carrying the working mode generates the motor driving signal corresponding to the working mode, including: The target high-frequency signal, the target low-frequency signal and the carrier signal are acquired, the target high-frequency signal and the target low-frequency signal are superimposed to obtain a target modulation signal, and a third motor driving signal is generated according to the target modulation signal and the carrier signal; The motor driving signal is input into a motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode. The third motor driving signal is input into the motor driving circuit, so that the motor driving circuit generates a third driving current in response to the third motor driving signal, and the third driving current is used to make the rotor of the motor module swing around the balance position with the first swing amplitude and the first swing frequency, and simultaneously make the rotor of the motor module vibrate around the current swing position with the first vibration amplitude and the first vibration frequency.

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