Electric toothbrush control device, electric toothbrush and control method

Abstract

The present invention relates to the technical field of toothbrushes, and in particular to an electric toothbrush control device, an electric toothbrush and a control method. In the control method and control device provided by the present invention, a control module is connected to a motor drive circuit, and the motor drive circuit is connected to a motor module, and the control module responds to a mode instruction carrying a working mode to generate a motor drive signal corresponding to the working mode, and the motor drive signal is input into the motor drive circuit; wherein the working mode includes a swing mode, a vibration mode and a shimmy mode; and the motor drive circuit responds to the motor drive signal to drive the motor module to operate in the working mode, thereby solving the problem that the prior art only relies on high-frequency vibration to achieve tooth cleaning, which easily misses the tooth parts to be cleaned, resulting in incomplete tooth cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of toothbrushes, and in particular to an electric toothbrush control device, an electric toothbrush and a control method. Background Art

[0002] Existing vibrating toothbrushes use a vibrating motor to generate high-frequency vibrations to clean teeth. When users use vibrating electric toothbrushes for a long time, they tend to develop the habit of cleaning their teeth only by the high-frequency vibrations of the vibrating electric toothbrush without manually sweeping. However, the vibration range of existing electric vibrating toothbrushes is small. If users use vibrating electric toothbrushes to clean teeth for a long time according to the above cleaning habits, it is easy to miss the parts of the teeth that need to be cleaned, resulting in incomplete teeth cleaning. Summary of the invention

[0003] The present invention 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 easily misses the tooth parts to be cleaned, resulting in incomplete tooth cleaning.

[0004] In one aspect, the present invention provides a control device for an electric toothbrush, comprising: a control module, a motor drive circuit, and a motor module;

[0005] The motor drive circuit is connected to the motor module;

[0006] The control module is connected to the motor drive circuit, and is used to respond to a mode instruction carrying an operating mode, generate a motor drive signal corresponding to the operating mode, and input the motor drive signal into the motor drive circuit; wherein the operating mode includes a swing mode, a vibration mode, and a shimmy mode;

[0007] The motor driving circuit is connected to the motor module and is used to respond to the motor driving signal to drive the motor module to operate in the working mode.

[0008] Optionally, when the working mode is the swing mode, the control module is specifically used to obtain a target low-frequency signal and a carrier signal, and generate a first motor drive signal according to the target low-frequency signal and the carrier signal, and input the first motor drive signal into the motor drive circuit;

[0009] The motor drive circuit is specifically used to respond to the first motor drive signal to generate a first drive current, and the first drive current is used to make the rotor of the motor module center on the equilibrium position and swing at a preset first swing amplitude and a preset first swing frequency.

[0010] Optionally, when the working mode is the vibration mode, the control module is specifically used to obtain the target high-frequency signal and the carrier signal, and generate a second motor drive signal according to the target high-frequency signal and the carrier signal, and input the second motor drive signal into the motor drive circuit;

[0011] The motor drive circuit is specifically used to respond to the second motor drive signal to generate a second drive current, and the second drive current is used to make the rotor of the motor module centered at a balanced position and vibrate at a preset first vibration amplitude and a preset first vibration frequency.

[0012] Optionally, when the working mode is the oscillation mode, the control module is specifically used to obtain a target high-frequency signal, a target low-frequency signal and a carrier signal, and superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor drive signal according to the target modulation signal and the carrier signal; and input the third motor drive signal into the motor drive circuit;

[0013] The motor drive circuit is specifically used to respond to the third motor drive signal to generate a third drive current, and the third drive current is used to make the rotor of the motor module centered at the equilibrium position and swing at the first swing amplitude and the first swing frequency, and at the same time make the rotor of the motor module centered at the current swing position and vibrate at the first vibration amplitude and the first vibration frequency.

[0014] Optionally, the motor drive circuit includes a DC power supply and an inverter circuit module;

[0015] The DC power supply is connected to the DC side of the inverter circuit module;

[0016] The AC output side of the inverter circuit module is connected to the winding of the motor module.

[0017] Another aspect of the present invention provides an electric toothbrush comprising the control device as described above.

[0018] Another aspect of the present invention provides a method for controlling an electric toothbrush, comprising:

[0019] In response to a mode instruction carrying an operating mode, a motor drive signal corresponding to the operating mode is generated; the operating mode includes a swing mode, a vibration mode and a shimmy mode;

[0020] 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.

[0021] Optionally, when the working mode is the swing mode, the responding to the mode instruction carrying the working mode to generate the motor drive signal corresponding to the working mode includes:

[0022] 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,

[0023] Inputting the motor drive signal into the motor drive circuit so that the motor drive circuit drives the motor module to operate in the working mode specifically includes:

[0024] The first motor drive signal is input into the motor drive circuit; the motor drive circuit responds to the first motor drive signal to generate a first drive current, and the first drive current is used to make the rotor of the motor module centered at a balance position and swing at a preset first swing amplitude and a preset first swing frequency.

[0025] Optionally, when the working mode is a vibration mode, the responding to a mode instruction carrying the working mode to generate a motor driving signal corresponding to the working mode includes:

[0026] Acquire a target high-frequency signal and the carrier signal, and generate a second motor drive signal according to the target high-frequency signal and the carrier signal;

[0027] Inputting the motor drive signal into the motor drive circuit so that the motor drive circuit drives the motor module to operate in the working mode specifically includes:

[0028] The second motor drive signal is input into the motor drive circuit, so that the motor drive circuit responds to the second motor drive signal and generates a second drive current, and the second drive current is used to make the rotor of the motor module centered at a balanced position and vibrate at a preset first vibration amplitude and a preset first vibration frequency.

[0029] Optionally, when the working mode is the oscillation mode, the responding to the mode instruction carrying the working mode to generate the motor driving signal corresponding to the working mode includes:

[0030] Acquire a target high-frequency signal, a target low-frequency signal and a carrier signal, and superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor drive signal according to the target modulation signal and the carrier signal;

[0031] Inputting the motor drive signal into the motor drive circuit so that the motor drive circuit drives the motor module to operate in the working mode specifically includes:

[0032] The third motor drive signal is input into the motor drive circuit, so that the motor drive circuit responds to the third motor drive signal to generate a third drive current, and the third drive current is used to make the rotor of the motor module centered at the equilibrium position and swing at the first swing amplitude and the first swing frequency, and at the same time make the rotor of the motor module centered at the current swing position and vibrate at the first vibration amplitude and the first vibration frequency.

[0033] It can be seen from the above technical solutions that the present invention has the following advantages:

[0034] The present invention provides an electric toothbrush control device, comprising: a control module, a motor drive circuit, and a motor module; the motor drive circuit is connected to the motor module; the control module is connected to the motor drive circuit, and is used to respond to a mode instruction carrying a working mode, generate a motor drive signal corresponding to the working mode, and input the motor drive signal into the motor drive circuit; the working mode includes a swing mode, a vibration mode, and a shimmy mode; the motor drive circuit is connected to the motor module, and is used to respond to the motor drive signal and drive the motor module to operate in the working mode.

[0035] In the present invention, the control module is connected to the motor drive circuit, and is used to respond to the mode instruction carrying the working mode, generate a motor drive signal corresponding to the working mode, and input the motor drive signal into the motor drive circuit, thereby obtaining a motor drive signal for controlling different working modes of the motor module; the motor drive circuit is connected to the motor module, and is used to respond to the motor drive signal and drive the motor module to operate in the working mode, wherein the working mode of the motor module of the present invention includes a swing mode, a vibration mode and a swing mode. Therefore, the present invention can generate different motor drive signals for different working modes in a targeted manner, and realize the adjustment and switching of the working mode of the motor module, thereby providing users with a variety of rich functional modes. When in use, users can switch the functional mode according to actual needs, so as to fully and comprehensively clean their teeth, avoiding the problem that the prior art only relies on high-frequency vibration to achieve tooth cleaning, which easily misses the tooth parts to be cleaned, resulting in incomplete tooth cleaning.

[0036] The present invention also provides a control method for an electric toothbrush, which generates a motor drive signal corresponding to the working mode by responding to a mode instruction carrying the working mode; the working modes include a swing mode, a vibration mode and a oscillation mode; and by inputting the motor drive signal into the motor drive circuit, the motor drive circuit drives the motor module to operate in the working mode, thereby solving the problem that the prior art only relies on high-frequency vibration to achieve teeth cleaning, which easily misses the parts of the teeth to be cleaned, resulting in incomplete teeth cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 A schematic structural diagram of an electric toothbrush control device provided by an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of a two-dimensional cross-sectional structure of a motor module is provided for an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of the structure of a motor drive circuit provided by an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of a waveform of a motor drive signal provided by an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of a waveform of a superposition of a target high-frequency signal and a target low-frequency signal provided by an embodiment of the present invention;

[0043] Figure 6 A schematic diagram of a waveform of a driving current provided by an embodiment of the present invention;

[0044] Figure 7 A schematic diagram of a two-dimensional cross-sectional structure of a motor module is provided for an embodiment of the present invention;

[0045] Figure 8 A schematic diagram of a two-dimensional cross-sectional structure of a motor module is provided for an embodiment of the present invention;

[0046] Fig. 9 A schematic diagram of the operation flow of an electric toothbrush control device provided by an embodiment of the present invention;

[0047] Fig.10 A flowchart of the steps of an electric toothbrush control method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The embodiments of the present invention provide 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 easily misses the tooth parts to be cleaned, resulting in incomplete tooth cleaning.

[0049] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] See also Figure 1 The present invention provides an electric toothbrush control device, comprising: a control module 1, a motor drive circuit 2, and a motor module 3; the motor drive circuit 2 is connected to the motor module 3; the control module 1 is connected to the motor drive circuit 2, and is used to respond to a mode instruction carrying a working mode, generate a motor drive signal corresponding to the working mode, and input the motor drive signal into the motor drive circuit 2; wherein the working mode includes a swing mode, a vibration mode, and a swing mode; the motor drive circuit 2 is connected to the motor module 3, and is used to respond to the motor drive signal and drive the motor module 3 to operate in the working mode.

[0051] It should be noted that the swing mode means that the motor module 3 swings at a preset first swing amplitude and a preset first swing frequency; the vibration mode means that the motor module 3 vibrates at a preset first vibration amplitude and a preset first vibration frequency. The swing mode means that the motor module 3 swings at a first swing amplitude and a first swing frequency, and vibrates at a first vibration amplitude and a first vibration frequency. The relationship between the above three working modes is "or". The motor module 3 is used to drive the brush head of the electric toothbrush to perform corresponding movements. It can be understood that the movement of the brush head is consistent with the movement of the motor module 3.

[0052] In practical applications, the working principle of this embodiment is:

[0053] The user inputs a mode instruction carrying a working mode to the control module 1. After receiving the mode instruction, the control module 1 parses the mode instruction to obtain the corresponding working mode, wherein the working module includes a swing mode, a vibration mode and a swing mode. Afterwards, the control module 1 generates a motor drive signal corresponding to the working mode, such as a motor drive signal for the swing mode, a motor drive signal corresponding to the vibration mode, and a motor drive signal corresponding to the swing mode, and inputs the corresponding motor drive signal into the motor drive circuit 2. After receiving the motor drive signal, the motor drive circuit 2 responds to the motor drive signal and controls the motor module 3 to operate in the corresponding working mode to achieve cleaning of the teeth.

[0054] For example: when the received motor drive signal is a motor drive signal corresponding to the swing mode, the motor drive circuit 2 controls the motor module 3 to operate in the swing mode, so that the brush head of the electric toothbrush swings according to the first swing amplitude and the first swing frequency, and vibrates at the same time with the first vibration amplitude and the first vibration frequency, so that the brush head of the electric toothbrush sweeps the tooth area to be cleaned with the preset first swing amplitude and swing frequency to simulate the user's manual sweeping, thereby increasing the cleaning area, and at the same time, it can also vibrate with the preset first vibration amplitude and the first vibration frequency to enhance the cleaning force, thereby improving the cleanliness of the tooth area to be cleaned, and avoiding the existing vibrating electric toothbrush due to the small vibration range, It is difficult to simulate the sweeping action of the user when manually brushing your teeth, resulting in incomplete cleaning of the tooth area.

[0055] In this embodiment, the control module 1 is connected to the motor drive circuit 2, and is used to respond to the mode instruction carrying the working mode, generate a motor drive signal corresponding to the working mode, and input the motor drive signal into the motor drive circuit 2, thereby obtaining a motor drive signal for controlling different working modes of the motor module 3; the motor drive circuit 2 is connected to the motor module 3, and is used to respond to the motor drive signal, drive the motor module 3 to operate in the working mode, and realize the adjustment of the working mode of the motor module 3. In addition, in the present application, the working mode of the motor module 3 includes a swing mode, a vibration mode, and a shimmy mode, thereby providing users with a variety of rich usage modes, and the working mode of the motor module 3 can be switched according to user needs, thereby avoiding the problem that the existing technology only relies on high-frequency vibration to achieve tooth cleaning, which is easy to miss the tooth part to be cleaned, resulting in incomplete tooth cleaning, and the operation is simple, reducing the user's learning cost, lowering the user's usage threshold, and improving the user's usage experience.

[0056] It should be noted that the motor module in the present invention may be a motor including a pair of poles. As an example, for example, the structure of the motor module 3 may be Figure 2 The limited angle motor structure shown in Figure 2 As shown, the motor module 3 may include an integrally formed stator core 11;

[0057] The stator core 11 is provided with a stator left tooth winding 12 and a stator right tooth winding 17 on both sides thereof;

[0058] A motor rotor 14 is disposed in the middle of the stator core 11;

[0059] A rotating shaft 15 is provided in the middle of the motor rotor 14;

[0060] The circumference of the motor rotor 14 is provided with a first rotor permanent magnet 13 and a second rotor permanent magnet 16;

[0061] The stator left tooth winding 12 and the stator right tooth winding 17 are wound in series and connected to the AC output side of the motor drive circuit 2 .

[0062] exist Figure 2 In the embodiment, the stator left tooth winding 12 and the stator right tooth winding 17 are both single-phase windings, which are wound in series on 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.

[0063] Its working principle is:

[0064] The motor drive circuit 2 responds to the motor drive signal and outputs corresponding drive current to the stator left tooth winding 12 and the stator right tooth winding 17, so that under the action of the first rotor permanent magnet 13 and the second rotor permanent magnet 16, the motor rotor 14 moves according to the corresponding working mode.

[0065] This embodiment simplifies the control method of the driving motor by adopting the motor module 3 of the above structure, making the driving method of the motor module 3 simpler, avoiding the existing sweeping vibration electric toothbrush, which adopts the servo motor drive, has a complex control method, and has high requirements for the motor and its driving hardware, resulting in high production costs and lower reliability compared to the vibration toothbrush.

[0066] In a specific embodiment, the magnetization direction of the first rotor permanent magnet 13 is toward the outside of the motor rotor 14 , and the magnetization direction of the second rotor permanent magnet 13 is toward the inside of the motor rotor 14 .

[0067] It should be noted that if Figure 2 As shown, the number of the first rotor permanent magnets 13 can be 2, and the number of the second rotor permanent magnets 16 can be 2, wherein the arrangement of the first rotor permanent magnets 13 and the second rotor permanent magnets 16 is NNSS. Figure 2 For example, Figure 2 The end of the first rotor permanent magnet 13 close to the inner side of the rotor is an N pole, and the end of the second rotor permanent magnet 16 close to the inner side of the rotor is an S pole. It can be understood that the magnetization directions of all the first rotor permanent magnets 13 are toward the outer side of the motor rotor 14, and the magnetization directions of all the second rotor permanent magnets 16 are toward the inner side of the motor rotor 14.

[0068] Specifically, the magnetization method of the first rotor permanent magnet 13 and the second rotor permanent magnet 16 includes parallel magnetization;

[0069] Understandably, Figure 2The motor structure shown is only used as a detailed description of an embodiment of the motor module 3 proposed by the present invention, and is not limited to this type of motor. The control principle of the control module 1 of the present invention is applicable to Figure 2 The limited angle motor shown is a motor with a similar structure.

[0070] In a specific embodiment, the motor drive circuit 2 includes a DC power supply 18 and an inverter circuit module;

[0071] The DC power supply 18 is connected to the DC side of the inverter circuit module;

[0072] The AC output side of the inverter circuit module is connected to the winding of the motor module 3 .

[0073] It should be noted that the DC power supply 18 is used to provide DC power. In this embodiment, the inverter circuit module can adopt a single-phase full-bridge inverter drive circuit, such as Figure 3 As shown, the drive circuit is an H-bridge drive circuit, including 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, wherein 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 a reverse diode to ensure normal freewheeling.

[0074] The connection between the first bridge arm switch tube 19 and the third bridge arm switch tube 102 is connected to 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 to the winding 100 of the motor module 3. Figure 2 In the motor structure shown, the winding 100 includes a stator left tooth winding 12 and a stator right tooth winding 17 .

[0075] The working principle of this embodiment is:

[0076] The control module 1 outputs a motor drive signal 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 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 changes in 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 across the winding 100 of the motor module 3 to change, thereby causing the current of the winding 100 of the motor module 3 to change, and then causing the rotor of the motor module 3 to move accordingly with the changing drive current waveform, thereby enabling the motor module 3 to operate in the corresponding working mode.

[0077] Among them, the relationship between the on state and the 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 is: the first bridge arm switch tube 19 and the third bridge arm switch tube 102 are turned off at the same time; the second bridge arm switch tube 101 and the fourth bridge arm switch tube 103 are turned off at the same time.

[0078] In a specific embodiment, the motor driving signal includes a first motor driving signal, a second motor driving signal and a third motor driving signal.

[0079] The swing mode corresponds to the first motor drive signal, the vibration mode corresponds to the second motor drive signal, and the oscillation mode corresponds to the third motor drive signal. The first motor drive signal, the second motor drive signal, and the third motor drive signal may be PWM signals.

[0080] In a specific embodiment, when the working mode is the swing mode, the control module 1 is specifically used to obtain the target low-frequency signal and the carrier signal, and generate a first motor drive signal according to the target low-frequency signal and the carrier signal, and input the first motor drive signal into the motor drive circuit 2;

[0081] The motor drive circuit 2 is specifically used to respond to the first motor drive signal to generate a first drive current, and the first drive current is used to make the rotor of the motor module 3 center on the equilibrium position and swing at a preset first swing amplitude and a preset first swing frequency.

[0082] It should be noted that the target low-frequency signal can be obtained by the control chip of the control module 1 by looking up the table. The carrier signal can use a high-frequency triangular carrier signal. Among them, 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 require an external signal source, reducing the cost of the device. When the motor module 3 uses Figure 2 In the motor structure shown, the rotor of the motor module 3 is the motor rotor 14 .

[0083] by Figure 2 Taking the motor structure shown in the figure as an example, the working principle of this embodiment is described as follows:

[0084] In this embodiment, the process of the control module 1 generating the first motor drive signal according to the target low-frequency signal and the carrier signal can be to adopt a preset modulation method, use the target low-frequency signal as the modulation signal, modulate the target low-frequency signal and the carrier signal to obtain a PWM signal, thereby adjusting the on state and the 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, changing the voltage at both ends of the winding 100, thereby changing the current of the winding 100 (i.e., the first drive current), so that under the action of the magnetic field constructed by the first rotor permanent magnet 13 and the second rotor permanent magnet 16, the motor rotor 14 swings according to the first swing amplitude and the first swing frequency.

[0085] The values ​​of the first swing amplitude and the first swing frequency can be set according to actual needs, and the values ​​of the first swing amplitude and the first swing frequency can reach the actual required values ​​by adjusting the amplitude and frequency of the modulation signal.

[0086] In an example, this example takes the SPWM modulation method and the sine wave signal as the modulation signal as an example for explanation. Figure 4 As shown, 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, and 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 level, and the corresponding switch tube is controlled to be turned on. Figure 4 It can be seen that 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 pulse width modulation principle, the change in 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 causes the voltage signal generated at both ends of the winding 100 to change, and the voltage change at both ends of the winding 100 will cause the current change. At this time, the current change waveform of the winding 100 is equivalent to the waveform of the modulation signal 104, and the current waveform of the winding 100 is also the first motor drive current. Therefore, the change in the current of the winding 100 causes the motor rotor 14 to swing with the equilibrium position as the center and at a preset first swing amplitude and a preset first swing frequency.

[0087] Therefore, in this embodiment, the amplitude and frequency of the modulation signal 104 can be adjusted to obtain the first motor driving current with different amplitudes and frequencies.

[0088] When the working mode is the vibration mode, the control module 1 is specifically used to obtain the target high-frequency signal and the carrier signal, and generate a second motor drive signal according to the target high-frequency signal and the carrier signal, and input the second motor drive signal into the motor drive circuit 2;

[0089] The motor drive circuit 2 is specifically used to respond to the second motor drive signal to generate a second drive current, and the second drive current is used to make the rotor of the motor module 3 vibrate with a preset first vibration amplitude and a preset first vibration frequency centered at a balanced position.

[0090] 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.

[0091] by Figure 2 Taking the motor structure shown in the figure as an example, the working principle of this embodiment is described as follows:

[0092] The process of the control module 1 generating the first motor drive signal according to the target high-frequency signal and the carrier signal can be to adopt a preset modulation method, use the target high-frequency signal as the modulation signal, modulate the target high-frequency signal and the carrier signal, and obtain a PWM signal, thereby adjusting the on state and the 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, changing the voltage across the winding 100, thereby changing the current of the winding 100 (i.e., the second drive current), and under the action of the magnetic field constructed by the first rotor permanent magnet 13 and the second rotor permanent magnet 16, the motor rotor 14 vibrates according to the first vibration amplitude and the first vibration frequency.

[0093] Among them, the generation principle of the second driving current is similar to the generation principle of the first motor driving signal. Please refer to the above description for details, and will not be repeated here.

[0094] 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 reach the actual required values ​​by adjusting the amplitude and frequency of the modulation signal.

[0095] In a specific embodiment, when the working mode is the oscillation mode, the control module 1 is specifically used to obtain a target high-frequency signal, a target low-frequency signal and a carrier signal, and superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor drive signal according to the target modulation signal and the carrier signal; and input the third motor drive signal into the motor drive circuit 2;

[0096] The motor drive circuit 2 is specifically used to respond to the third motor drive signal and generate a third drive current. The third drive current is used to make the rotor of the motor module 3 centered on the equilibrium position and swing at a first swing amplitude and a first swing frequency, and at the same time make the rotor of the motor module 3 centered on the current swing position and vibrate at a first vibration amplitude and a first vibration frequency.

[0097] It should be noted that in this embodiment, when the working mode is the swing mode, the rotor of the motor module 3 swings and vibrates at the same time, thereby simulating the user's manual sweeping of the cleaning area, improving the tooth cleanliness, and expanding the cleaning area. In particular, since the position of the rotor of the motor module 3 changes during the swinging process, the motor module 3 of this embodiment vibrates with the real-time swing position of the rotor as the center during the vibration, so the current swing position refers to the real-time acquired position of the motor rotor 14.

[0098] by Figure 2 Taking the motor structure shown in the figure as an example, the working principle of this embodiment is described as follows:

[0099] 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 a preset modulation method to obtain a target modulation signal, and adopts a preset modulation method to modulate the target modulation signal and the high-frequency carrier signal to obtain a PWM signal. At this time, the PWM signal is the third motor drive signal. After that, the third drive signal is input into each switch tube in the motor drive circuit 2, and each switch tube is turned on and off, thereby changing the current of the winding 100. At this time, the current of the winding 100 is the third drive current. According to the pulse width modulation principle, the waveform of the third drive current is consistent with the waveform of the target modulation signal, and is also a superposition of the high-frequency current signal and the low-frequency current signal. Therefore, under the action of the third drive current and the magnetic field of the first rotor permanent magnet 13 and the second rotor permanent magnet 16, the motor rotor 14 is centered on the equilibrium position and swings at the first swing amplitude and the first swing frequency, and at the same time, the motor rotor 14 is centered on the current swing position and vibrates at the first vibration amplitude and the first vibration frequency.

[0100] In one example, the superimposed waveform of the target high-frequency signal and the target low-frequency signal is as follows: Figure 5 shown.

[0101] In one example, the preset modulation method may be, but is not limited to, SPWM, SVPWM, DPWM, etc., which can perform high and low frequency signal modulation and can generate signal modulation that superimposes a high frequency signal and a low frequency signal.

[0102] In one example, the target high-frequency signal and the target low-frequency signal may be, but are not limited to, a sine wave, a sawtooth wave, or a steamed-bun wave. The frequencies of the target high-frequency signal and the target low-frequency signal may be selected according to actual conditions.

[0103] For example, the target high-frequency signal and the target low-frequency signal both use sine waves, and the working mode is the oscillation mode. Figure 5 As shown, 108 is the target high frequency signal, 109 is the target low frequency signal, and when the superimposed signals act on the motor drive circuit 2, the drive current generated on the motor winding 100 is as shown in FIG. Figure 6 As shown in 110.

[0104] In order to more clearly illustrate the wide applicability of the motor module of the present invention, two examples of motor modules are added below for illustration.

[0105] Example 1:

[0106] The motor module 3 can be used as follows Figure 7 Different from Figure 2 The motor structure may specifically include a first stator permanent magnet 111, a second stator permanent magnet 112, a third stator permanent magnet 113, a fourth stator permanent magnet 114, a motor housing 115, an internal support structure 116, a motor rotor 117, a first rotor winding 118, and a second rotor winding 119.

[0107] In Example 1, Figure 3 The winding 100 of the motor module 3 shown is the first rotor winding 118 and the second rotor winding 119. The rotor of the motor module 3 is the motor rotor 117, wherein the first stator permanent magnet 111, the second stator permanent magnet 113, and the fourth stator permanent magnet 114 are all used to construct the magnetic field environment inside the motor, and their functions are similar to Figure 2 The first rotor permanent magnet 13 and the second rotor permanent magnet 16 shown have similar functions.

[0108] In this example, the novel control method proposed by the present invention is described as follows:

[0109] When the working mode is the swing mode, the control module 1 is specifically used to obtain the target low-frequency signal and the carrier signal, and generate a first motor drive signal according to the target low-frequency signal and the carrier signal, and input the first motor drive signal into the motor drive circuit 2;

[0110] The motor driving circuit 2 is specifically used to respond to the first motor driving signal and generate a first driving current, and the first driving current is used to make the motor rotor 117 center on the equilibrium position and swing at a preset first swing amplitude and a preset first swing frequency.

[0111] When the working mode is the vibration mode, the control module 1 is specifically used to obtain the target high-frequency signal and the carrier signal, and generate a second motor drive signal according to the target high-frequency signal and the carrier signal, and input the second motor drive signal into the motor drive circuit 2;

[0112] The motor driving circuit 2 is specifically used to respond to the second motor driving signal and generate a second driving current, and the second driving current is used to make the motor rotor 117 vibrate with a preset first vibration amplitude and a preset first vibration frequency centered at the equilibrium position.

[0113] When the working mode is the oscillation mode, the control module 1 is specifically used to obtain a target high-frequency signal, a target low-frequency signal and a carrier signal, and superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor drive signal according to the target modulation signal and the carrier signal; and input the third motor drive signal into the motor drive circuit 2;

[0114] The motor drive circuit 2 is specifically used to respond to the third motor drive signal and generate a third drive current. The third drive current is used to make the motor rotor 117 swing with a first swing amplitude and a first swing frequency centered on a balanced position, and at the same time make the motor rotor 117 vibrate with a first vibration amplitude and a first vibration frequency centered on a current swing position.

[0115] It can be understood that the working principles of the swing mode, vibration mode and shimmy mode in Example 1 can refer to the aforementioned embodiments and will not be repeated here.

[0116] Example 2:

[0117] The motor module 3 can be used as follows Figure 8 Different from Figure 2 The motor structure may 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.

[0118] In Example 2, Figure 3 The winding 100 of the motor module 3 shown 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 first stator permanent magnet 111, the second stator permanent magnet 113, and the fourth stator permanent magnet 114 are all used to construct the magnetic field environment inside the motor, and their functions are similar to Figure 2 The first rotor permanent magnet 13 and the second rotor permanent magnet 16 shown have similar functions.

[0119] In this example, the novel control method proposed by the present invention is described as follows:

[0120] When the working mode is the swing mode, the control module 1 is specifically used to obtain the target low-frequency signal and the carrier signal, and generate a first motor drive signal according to the target low-frequency signal and the carrier signal, and input the first motor drive signal into the motor drive circuit 2;

[0121] The motor driving circuit 2 is specifically used to respond to the first motor driving signal and generate a first driving current, and the first driving current is used to make the motor rotor 127 center on the equilibrium position and swing at a preset first swing amplitude and a preset first swing frequency.

[0122] When the working mode is the vibration mode, the control module 1 is specifically used to obtain the target high-frequency signal and the carrier signal, and generate a second motor drive signal according to the target high-frequency signal and the carrier signal, and input the second motor drive signal into the motor drive circuit 2;

[0123] The motor drive circuit 2 is specifically used to respond to the second motor drive signal and generate a second drive current, and the second drive current is used to make the motor rotor 127 vibrate with a preset first vibration amplitude and a preset first vibration frequency centered at the equilibrium position.

[0124] When the working mode is the oscillation mode, the control module 1 is specifically used to obtain a target high-frequency signal, a target low-frequency signal and a carrier signal, and superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor drive signal according to the target modulation signal and the carrier signal; and input the third motor drive signal into the motor drive circuit 2;

[0125] The motor drive circuit 2 is specifically used to respond to the third motor drive signal to generate a third drive current. The third drive current is used to make the motor rotor 127 swing with a first swing amplitude and a first swing frequency centered on a balanced position, and at the same time make the motor rotor 127 vibrate with a first vibration amplitude and a first vibration frequency centered on a current swing position.

[0126] It can be understood that, in Example 2, the control principles of the swing mode, the vibration mode, and the shimmy mode can refer to the aforementioned embodiments and will not be repeated here.

[0127] It should be emphasized that Figure 2 , Figure 7 , Figure 8 The motor structure listed is only an exemplary description to assist in explaining the control principle of the control device provided by the present invention, and is not used to limit the structure of the motor module 3 of the present invention. The motor module 3 in the embodiment of the present invention is not limited to Figure 2 , Figure 7 and Figure 8 The motor with the structure shown can be any motor with a pair of poles, or Figure 2 , Figure 7 , Figure 8 Similar motors of the structure shown, etc.

[0128] In a specific embodiment, under normal working conditions, if the power is normally cut off, the rotor of the motor module 3 will automatically return to the equilibrium position, and there is no need to re-position the entire process.

[0129] In a practical application example, the operation process of the embodiment of the present invention is as follows: Fig. 9 As shown:

[0130] S100: The motor module 3 is in standby state after being powered on;

[0131] S101: receiving a motion mode input by a user, wherein the motion mode is divided into a swing working mode, a vibration working mode, and a swing vibration working mode;

[0132] S102: When the motion mode is input into the control chip of the control module 1, the control chip generates a start signal.

[0133] S103: The control chip generates a modulation signal waveform 104 and a carrier signal 105 corresponding to the motion mode, and generates and outputs a PWM control signal according to the modulation signal waveform and the carrier signal.

[0134] S104: the motor drive circuit 2 receives the PWM control signal and controls the on and off of the switches of each bridge arm in the inverter circuit module, thereby generating a drive current in the motor winding and causing the motor rotor 14 to achieve corresponding movement.

[0135] S105: When a stop signal input by the user is received, execute S106;

[0136] S106: The control chip stops outputting the PWM control signal, and executes step S107;

[0137] S107: Turn off all bridge arm switches in the motor drive circuit 2, and jump to S100 to return the motor to the standby state.

[0138] An embodiment of the present invention further provides an electric toothbrush, comprising the control device of any of the above embodiments.

[0139] See also Fig.10 The embodiment of the present invention also provides a control method for an electric toothbrush, which is not limited to Figure 2 , Figure 7 and Figure 8 The three structures of the motor shown can be applied to all motors with one pole, and can also be applied to motors with Figure 2 , Figure 7 , Figure 8 A motor of similar construction as shown.

[0140] Among them, the control method includes:

[0141] 201. Responding to a mode instruction carrying a working mode, generating a motor driving signal corresponding to the working mode; the working modes include a swing mode, a vibration mode and a shimmy mode;

[0142] 202. Input the motor driving signal into the motor driving circuit, so that the motor driving circuit drives the motor module to operate in the working mode.

[0143] This embodiment generates a motor drive signal corresponding to the working mode by responding to a mode instruction carrying the working mode, and inputs the motor drive signal into the motor drive circuit, so that the motor drive circuit drives the motor module to operate in the working mode, thereby solving the problem that the prior art only relies on high-frequency vibration to achieve teeth cleaning, which easily misses the parts of the teeth to be cleaned, resulting in incomplete teeth cleaning.

[0144] In a specific embodiment, when the working mode is the swing mode, step 201 specifically includes:

[0145] A target low-frequency signal and a carrier signal are acquired, and a first motor driving signal is generated according to the target low-frequency signal and the carrier signal.

[0146] Step 202 specifically includes:

[0147] The first motor drive signal is input into the motor drive circuit, so that the motor drive circuit generates a first drive current. The first drive current is used to make the rotor of the motor module center on the equilibrium position and swing at a preset first swing amplitude and a preset first swing frequency.

[0148] In a specific embodiment, when the working mode is the swing mode, step 201 specifically includes:

[0149] Acquire a target high-frequency signal and a carrier signal, and generate a second motor drive signal according to the target high-frequency signal and the carrier signal,

[0150] Step 202 specifically includes:

[0151] The second motor drive signal is input into the motor drive circuit, so that the motor drive circuit generates a second drive current. The second drive current is used to make the rotor of the motor module vibrate with a balanced position as the center and at a preset first vibration amplitude and a preset first vibration frequency.

[0152] In a specific embodiment, when the working mode is the oscillation mode, step 201 specifically includes:

[0153] Acquire a target high-frequency signal, a target low-frequency signal, and a carrier signal, and superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor drive signal according to the target modulation signal and the carrier signal;

[0154] Step 202 specifically includes:

[0155] The third motor drive signal is input into the motor drive circuit, so that the motor drive circuit generates a third drive current. The third drive current is used to make the rotor of the motor module centered at the equilibrium position and swing at a first swing amplitude and a first swing frequency, and at the same time make the rotor of the motor module centered at the current swing position and vibrate at a first vibration amplitude and a first vibration frequency.

[0156] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0157] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0158] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0159] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each functional unit may be physically separate, or two or more functional units may be integrated into one processing unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0160] If the integrated unit is implemented 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 solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0161] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0162] It should also be noted that in the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0163] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control device for an electric toothbrush, characterized in that: include: Control module, motor drive circuit, motor module; The motor drive circuit is connected to the motor module; The control module is connected to the motor drive circuit, and is used to respond to a mode instruction carrying an operating mode, generate a motor drive signal corresponding to the operating mode, and input the motor drive signal into the motor drive circuit; wherein the operating mode includes a swing mode, a vibration mode, and a shimmy mode; The motor drive circuit is connected to the motor module and is used to respond to the motor drive signal and drive the motor module to operate in the working mode; When the working mode is the oscillation mode, the control module is specifically used to obtain a target high-frequency signal, a target low-frequency signal and a carrier signal, and superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor drive signal according to the target modulation signal and the carrier signal; and input the third motor drive signal into the motor drive circuit; The motor drive circuit is specifically used to respond to the third motor drive signal to generate a third drive current, and the third drive current is used to make the rotor of the motor module centered on the equilibrium position and swing at a first swing amplitude and a first swing frequency, and at the same time make the rotor of the motor module centered on the real-time position of the rotor during the swinging process and vibrate at a first vibration amplitude and a first vibration frequency.

2. The control device according to claim 1, characterized in that: When the working mode is the swing mode, the control module is specifically used to obtain a target low-frequency signal and a carrier signal, and generate a first motor drive signal according to the target low-frequency signal and the carrier signal, and input the first motor drive signal into the motor drive circuit; The motor drive circuit is specifically used to respond to the first motor drive signal to generate a first drive current, and the first drive current is used to make the rotor of the motor module center on the equilibrium position and swing at a preset first swing amplitude and a preset first swing frequency.

3. The control device according to claim 2, characterized in that: When the working mode is the vibration mode, the control module is specifically used to obtain the target high-frequency signal and the carrier signal, and generate a second motor drive signal according to the target high-frequency signal and the carrier signal, and input the second motor drive signal into the motor drive circuit; The motor drive circuit is specifically used to respond to the second motor drive signal to generate a second drive current, and the second drive current is used to make the rotor of the motor module centered at a balanced position and vibrate at a preset first vibration amplitude and a preset first vibration frequency.

4. The control device according to claim 1, characterized in that: The motor drive circuit includes a DC power supply and an inverter circuit module; The DC power supply is connected to the DC side of the inverter circuit module; The AC output side of the inverter circuit module is connected to the winding of the motor module.

5. An electric toothbrush, characterized in that: Comprising a control device as described in any one of claims 1 to 4.

6. A method for controlling an electric toothbrush, characterized in that: The device according to any one of claims 1 to 4 comprises: In response to a mode instruction carrying an operating mode, a motor drive signal corresponding to the operating mode is generated; the operating mode includes a swing mode, a vibration mode and a shimmy mode; Inputting the motor drive signal into the motor drive circuit so that the motor drive circuit drives the motor module to operate in the working mode; When the working mode is the oscillation mode, the responding to the mode instruction carrying the working mode to generate the motor driving signal corresponding to the working mode includes: Acquire a target high-frequency signal, a target low-frequency signal and a carrier signal, and superimpose the target high-frequency signal and the target low-frequency signal to obtain a target modulation signal, and generate a third motor drive signal according to the target modulation signal and the carrier signal; Inputting the motor drive signal into the motor drive circuit so that the motor drive circuit drives the motor module to operate in the working mode specifically includes: The third motor drive signal is input into the motor drive circuit, so that the motor drive circuit responds to the third motor drive signal to generate a third drive current, and the third drive current is used to make the rotor of the motor module centered on the equilibrium position and swing at the first swing amplitude and the first swing frequency, and at the same time make the rotor of the motor module centered on the real-time position of the rotor during the swinging process and vibrate at the first vibration amplitude and the first vibration frequency.

7. The control method according to claim 6, characterized in that: When the working mode is the swing mode, the responding to the mode instruction carrying the working mode to generate the motor driving signal corresponding to the working mode includes: acquiring a target low-frequency signal and a carrier signal, and generating a first motor driving signal according to the target low-frequency signal and the carrier signal, Inputting the motor drive signal into the motor drive circuit so that the motor drive circuit drives the motor module to operate in the working mode specifically includes: The first motor drive signal is input into the motor drive circuit; the motor drive circuit responds to the first motor drive signal to generate a first drive current, and the first drive current is used to make the rotor of the motor module centered at a balance position and swing at a preset first swing amplitude and a preset first swing frequency.

8. The control method according to claim 6, characterized in that: When the working mode is the vibration mode, the responding to the mode instruction carrying the working mode to generate the motor driving signal corresponding to the working mode includes: Acquire a target high-frequency signal and the carrier signal, and generate a second motor drive signal according to the target high-frequency signal and the carrier signal; Inputting the motor drive signal into the motor drive circuit so that the motor drive circuit drives the motor module to operate in the working mode specifically includes: The second motor drive signal is input into the motor drive circuit, so that the motor drive circuit responds to the second motor drive signal and generates a second drive current, and the second drive current is used to make the rotor of the motor module centered at a balanced position and vibrate at a preset first vibration amplitude and a preset first vibration frequency.

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