A sonic motor driving method and an electric toothbrush

Abstract

The present application discloses a sonic wave motor driving method and an electric toothbrush, the method comprising: obtaining a first interval pulse of a first frequency and a first sub-pulse duty cycle and a second interval pulse of a second frequency and a second sub-pulse duty cycle, using the first interval pulse and the second interval pulse to obtain a first composite drive pulse and a second composite drive pulse according to a preset duty cycle and frequency respectively; inputting the first composite drive pulse and the second composite drive pulse into the sonic wave motor, using the first composite drive pulse and the second composite drive pulse to drive the sonic wave motor to vibrate at a high level with a mutual interval of a first sub-pulse duty cycle in the first composite drive pulse and a second sub-pulse duty cycle in the second composite drive pulse at a preset step interval, and swinging left and right, with the first frequency being equal to the second frequency. The vibration and swinging functions of the sonic wave motor are realized, which not only avoids the cost problem of the existing electric toothbrush using a servo motor for sweeping vibration, but also reduces the noise of the electric toothbrush during use.

Description

Technical Field

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

[0002] Electric toothbrushes are a common oral care tool. They are easy to operate and have a significant oral cleaning effect. They have become widely used by the public. Electric toothbrushes use the rapid rotation or vibration of the motor core to make the brush head vibrate at a high frequency, instantly breaking down the toothpaste into fine foam and deeply cleaning the gaps between teeth. At the same time, the vibration of the bristles can promote blood circulation in the oral cavity and have a massage effect on the gum tissue.

[0003] The sweeping vibration principle of the sweeping vibration electric toothbrush is mainly through a specific motor and transmission system, which enables the brush head to generate high-frequency vibration and swing in a large range. It relies on a self-developed servo system to achieve sweeping. The system has a built-in algorithm chip that accurately monitors the real-time speed and angle of the motor, and transmits the data to the control chip, calculates the pressure and power consumption required to overcome, and then outputs it to the motor, allowing the brush head to maintain stable, high-frequency horizontal vibration, while actively performing a 60° large-scale swing sweep.

[0004] The sweeping vibration electric toothbrush combines vibration and sweeping functions, which can better cover the tooth surface and teeth gaps and improve cleaning efficiency. The sweeping vibration electric toothbrush can achieve 93.5% of the cleaning efficiency of other electric toothbrushes in 3 minutes in 2 minutes.

[0005] However, the sweeping motor of the sweeping electric toothbrush makes relatively loud noise when in operation, and the servo motor is relatively expensive. Summary of the invention

[0006] The servo motor used in the existing sweeping vibration electric toothbrush produces relatively loud noise during operation and has a relatively high cost.

[0007] In view of the above problems, a sonic wave motor driving method and an electric toothbrush are proposed. A first composite drive pulse and a second composite drive pulse are obtained by construction, and the first sub-pulse duty cycle of the first interval pulse in the first composite drive pulse and the second sub-pulse duty cycle of the second interval pulse in the second composite drive pulse are adjusted at a preset step interval to perform left and right swings, thereby realizing the vibration and swinging functions of the sonic wave motor. This not only avoids the cost problem of the existing electric toothbrush using a servo motor for sweeping vibration, but also reduces the use noise of the electric toothbrush and improves the user experience.

[0008] In a first aspect, a method for driving an acoustic wave motor comprises:

[0009] Step 100, obtaining a first interval pulse of a first frequency and a first sub-pulse duty cycle and a second interval pulse of a second frequency and a second sub-pulse duty cycle, and using the first interval pulse and the second interval pulse to obtain a first composite drive pulse and a second composite drive pulse according to a preset duty cycle and frequency respectively;

[0010] Step 200, adjusting the duty cycle of the first sub-pulse of the first interval pulse in the first composite driving pulse and the duty cycle of the second sub-pulse of the second interval pulse in the second composite driving pulse at a preset step interval;

[0011] Step 300: input the first composite drive pulse and the second composite drive pulse to the sonic wave motor, and utilize the first composite drive pulse and the second composite drive pulse to drive the sonic wave motor to vibrate and swing at a high level with a first frequency being equal to the second frequency.

[0012] Furthermore, the step 100 includes:

[0013] Step 110, outputting the first interval pulse with a first frequency and a first sub-pulse duty cycle to obtain a first composite pulse;

[0014] Step 120: output the first composite pulse at a preset frequency and a preset duty cycle to obtain a first composite driving pulse composed of all the first composite pulses.

[0015] Furthermore, after step 120, step 100 further includes:

[0016] Step 130, outputting the second interval pulse with a second frequency and a second sub-pulse duty cycle to obtain a second composite pulse;

[0017] Step 140: output the second composite pulse at a preset frequency and a preset duty cycle to obtain a second composite driving pulse composed of all the second composite pulses.

[0018] Furthermore, the step 300 includes:

[0019] Step 310, obtaining a first driving timing and a second driving timing, wherein the first driving timing and the second driving timing are sequentially and alternately driven at a high level;

[0020] Step 320: output the first composite drive pulse at the first drive timing, and output the second composite drive pulse at the second drive timing to drive the acoustic wave motor.

[0021] Furthermore, the step 200 includes:

[0022] Step 210: increasing the duty cycle of the first sub-pulse of the first interval pulse in the first composite drive pulse by a preset step length, and reducing the duty cycle of the second sub-pulse of the second interval pulse in the second composite drive pulse by a preset step length, so that the electric toothbrush swings in the first direction;

[0023] Step 220, reducing the duty cycle of the first sub-pulse of the first interval pulse in the first composite drive pulse by a preset step length, and increasing the duty cycle of the second sub-pulse of the second interval pulse in the second composite drive pulse by a preset step length, so that the electric toothbrush swings in the second direction;

[0024] Step 230, looping through steps 210 to 220 to make the electric toothbrush swing left and right.

[0025] Furthermore, the step 210 includes:

[0026] Step 211, keeping the preset duty cycle of the first composite driving pulse unchanged, taking the first composite pulse as a unit, sequentially increasing the duty cycle of the first sub-pulse of the first interval pulse in the first composite pulse;

[0027] Step 212: Keep the preset duty cycle of the second composite driving pulse unchanged, and reduce the duty cycle of the second sub-pulse of the second interval pulse in the second composite pulse, taking the second composite pulse as a unit;

[0028] The duty cycle of the first sub-pulse of each driving pulse in the first composite pulse is equal, and the duty cycle of the second sub-pulse of each driving pulse in the second composite pulse is equal.

[0029] Furthermore, the step 220 includes:

[0030] Step 221, keeping the preset duty cycle of the first composite driving pulse unchanged, taking the first composite pulse as a unit, sequentially reducing the duty cycle of the first sub-pulse of the first interval pulse in the first composite pulse;

[0031] Step 222: Keep the preset duty cycle of the second composite driving pulse unchanged, and increase the duty cycle of the second sub-pulse of the second interval pulse in the second composite pulse in units of the second composite pulse;

[0032] The duty cycle of the first sub-pulse of each driving pulse in the first composite pulse is equal, and the duty cycle of the second sub-pulse of each driving pulse in the second composite pulse is equal.

[0033] In a second aspect, an electric toothbrush adopts the sonic motor driving method described in the first aspect, comprising:

[0034] An acquisition module, used for acquiring a first interval pulse of a first frequency and a first sub-pulse duty cycle and a second interval pulse of a second frequency and a second sub-pulse duty cycle, and obtaining a first composite drive pulse and a second composite drive pulse by using the first interval pulse and the second interval pulse according to a preset duty cycle and frequency respectively;

[0035] an adjustment module, configured to adjust the duty cycle of a first sub-pulse of a first interval pulse in the first composite driving pulse and the duty cycle of a second sub-pulse of a second interval pulse in the second composite driving pulse at a preset step interval;

[0036] The sweep vibration module is used to input the first composite driving pulse and the second composite driving pulse to the acoustic wave motor, and drive the acoustic wave motor to vibrate and swing by using the first composite driving pulse and the second composite driving pulse to be spaced apart at a high level.

[0037] In conjunction with the electric toothbrush described in the second aspect of the present invention, in a first possible implementation manner, the acquisition module includes:

[0038] The first output unit is used to output the first interval pulse at a first frequency and a first sub-pulse duty cycle to obtain a first composite pulse, and to output the first composite pulse at a preset frequency and a preset duty cycle to obtain a first composite drive pulse composed of all first composite pulses.

[0039] The second output unit is used to output the second interval pulse at a second frequency and a second sub-pulse duty cycle to obtain a second composite pulse, and to output the second composite pulse at a preset frequency and a preset duty cycle to obtain a second composite drive pulse composed of all second composite pulses.

[0040] In conjunction with the electric toothbrush described in the second aspect of the present invention, in a first possible implementation manner, the adjustment module includes:

[0041] A first driving unit, configured to increase the duty cycle of a first sub-pulse of a first interval pulse in the first composite driving pulse by a preset step length, and simultaneously reduce the duty cycle of a second sub-pulse of a second interval pulse in the second composite driving pulse by a preset step length, so as to drive the electric toothbrush to swing in a first direction;

[0042] The second driving unit is used to reduce the duty cycle of the first sub-pulse of the first interval pulse in the first composite driving pulse by a preset step size, and at the same time increase the duty cycle of the second sub-pulse of the second interval pulse in the second composite driving pulse by a preset step size, so as to drive the electric toothbrush to swing in a second direction.

[0043] A sonic wave motor driving method and an electric toothbrush in the present invention are implemented, and a first composite drive pulse and a second composite drive pulse are obtained by construction, and the first sub-pulse duty cycle of the first interval pulse in the first composite drive pulse and the second sub-pulse duty cycle of the second interval pulse in the second composite drive pulse are adjusted at preset step intervals to perform left and right swings, thereby realizing the vibration and swinging functions of the sonic wave motor, which not only avoids the cost problem of the existing electric toothbrush using a servo motor for sweeping vibration, but also reduces the use noise of the electric toothbrush and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 It is a schematic diagram of the driving pulse of the sonic motor in the prior art;

[0046] Figure 2 It is a schematic diagram of the pulse partitioning of the sonic motor drive in this application;

[0047] Figure 3-Figure 6 It is a schematic diagram of the adjustment process of the duty ratio of the first interval pulse and the duty ratio of the second interval pulse during the rightward swing of the sonic motor in the present application;

[0048] Figure 7 It is a flow chart of a specific implementation of a sonic motor driving method in the present application;

[0049] Figure 8 yes Figure 7 A flowchart of a specific implementation of S100;

[0050] Fig. 9 yes Figure 8 A flowchart of a specific implementation method after S120;

[0051] Fig.10 yes Figure 7 A flowchart of a specific implementation of S200;

[0052] Fig.11 yes Fig.10 A flowchart of a specific implementation of S210;

[0053] Fig.12 yes Fig.10 A flowchart of a specific implementation of S220;

[0054] Fig.13 yes Figure 7 A flowchart of a specific implementation of S300;

[0055] Fig.14 This is a module structure diagram of an electric toothbrush in this application. DETAILED DESCRIPTION

[0056] The following will be combined with the accompanying drawings in the invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0057] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] The servo motor used in the existing sweeping vibration electric toothbrush produces a lot of noise when working and is also very expensive. Figure 1 , Figure 1 It is a schematic diagram of a sonic motor driving pulse in the prior art, which can only vibrate but cannot sweep.

[0061] In view of the above problems, a sonic motor driving method and an electric toothbrush are proposed.

[0062] In a first aspect, a method for driving an acoustic wave motor is provided. Figure 7 , Figure 7 It is a flowchart of a specific implementation of a sonic motor driving method in the present application; it includes:

[0063] S100, obtaining a first interval pulse of a first frequency and a first sub-pulse duty cycle and a second interval pulse of a second frequency and a second sub-pulse duty cycle, and using the first interval pulse and the second interval pulse to obtain a first composite drive pulse T1 and a second composite drive pulse T2 according to preset duty cycles and frequencies.

[0064] In this embodiment, if Figure 2 , Figure 2 Schematic diagram of the acoustic wave motor driving pulse partition in the present application; the first interval pulse is the interval pulse in the first composite driving pulse T1, and in each interval pulse, the duty cycle of each pulse is equal, such as Figure 2 The first composite drive pulse T1 includes multiple first interval pulses (A, B, C, D), and the duty cycle (duration) of each interval pulse (A, B, C, D) is equal, that is, the duty cycle of the A interval pulse, the duty cycle of the B interval pulse, the duty cycle of the C interval pulse, and the duty cycle of the D interval pulse are equal.

[0065] Similarly, the second composite drive pulse T2 includes multiple second interval pulses (A, B, C, D), and the duty cycle (duration) of each interval pulse (A, B, C, D) is equal, that is, the duty cycle of the A interval pulse, the duty cycle of the B interval pulse, the duty cycle of the C interval pulse, and the duty cycle of the D interval pulse are equal.

[0066] Each interval pulse (A / B / C / D) contains many sub-pulses. The duty cycles of the sub-pulses within the interval are equal, but the duty cycles of the sub-pulses in adjacent interval pulses in the same channel are different. For example, the duty cycle of the sub-pulse in the A interval pulse of the first channel is different from the duty cycle of the sub-pulse in the B interval pulse.

[0067] In this embodiment, the first frequency is equal to the second frequency, for example, both can be 18KHZ, and the number of sub-pulses of the first interval pulse is equal to the number of sub-pulses of the second interval pulse.

[0068] In a preferred embodiment, if Figure 8 , Figure 8 yes Figure 7 A flowchart of a specific implementation of S100; S100 includes: S110, outputting a first interval pulse with a first frequency and a first sub-pulse duty cycle to obtain a first composite pulse; S120, outputting a first composite pulse with a preset frequency and a preset duty cycle to obtain a first composite drive pulse T1 composed of all first composite pulses.

[0069] In this embodiment, the duty ratios of the sub-pulses of the first interval pulses are equal in the same interval pulses of the same channel, and are different in different intervals of the same channel. The first interval pulse is a pulse signal output by the first channel, and the swing direction is adjusted by changing the duty ratios of the sub-pulses in the first interval pulses (each interval pulse).

[0070] In a preferred embodiment, Fig. 9 , Fig. 9 yes Figure 8 A flowchart of a specific implementation method after S120; S100 also includes: S130, outputting a second interval pulse with a second frequency and a second sub-pulse duty cycle to obtain a second composite pulse; S140, outputting a second composite pulse with a preset frequency and a preset duty cycle to obtain a second composite drive pulse T2 composed of all second composite pulses.

[0071] In this embodiment, the duty ratios of the sub-pulses of the second interval pulses are equal in the same interval pulses of the same channel, and are different in different intervals of the same channel. The second interval pulse is a pulse signal output by the second channel, and the swing direction is adjusted by changing the duty ratios of the sub-pulses in the second interval pulses (each interval pulse).

[0072] S200 , adjusting the first sub-pulse duty ratio of the first interval pulse in the first composite driving pulse T1 and the second sub-pulse duty ratio of the second interval pulse in the second composite driving pulse T2 at a preset step interval.

[0073] In a preferred embodiment, Fig.10 , Fig.10 yes Figure 7 A flowchart of a specific implementation method of S200; S200 includes: S210, increasing the duty cycle of the first sub-pulse of the first interval pulse in the first composite drive pulse T1 by a preset step size, and reducing the duty cycle of the second sub-pulse of the second interval pulse in the second composite drive pulse T2 by a preset step size, so that the electric toothbrush swings in the first direction; S220, reducing the duty cycle of the first sub-pulse of the first interval pulse in the first composite drive pulse T1 by a preset step size, and increasing the duty cycle of the second sub-pulse of the second interval pulse in the second composite drive pulse T2 by a preset step size, so that the electric toothbrush swings in the second direction; S230, looping S210-S220 to make the electric toothbrush swing left and right.

[0074] In this embodiment, if Figure 3-Figure 6 , Figure 3-Figure 6 It is a schematic diagram of the adjustment process of the duty ratio of the first interval pulse and the duty ratio of the second interval pulse during the rightward swing of the sonic motor in this application. When the brush head of the electric toothbrush swings left and right in the middle and wants to sweep to the right, Figure 3 The pulse waveform in .

[0075] The duty cycles of adjacent pulses (interval pulses) of the two channels are equal. As the brush head is going to sweep to the right, the duty cycle of the sub-pulses in the interval pulses of the second channel will gradually increase, while the duty cycle of the sub-pulses in the interval pulses of the first channel will gradually decrease, assuming that the preset step lengths are both 2%.

[0076] When the brush head sweeps to the right, Figure 4 and Figure 5 In the pulse waveform, the duty cycle of the sub-pulse in the interval pulse of the second channel is larger than that of the sub-pulse in the interval pulse of the first channel. Since the motor has a torque to restore the brush head to the middle, the brush head will not be pulled to the rightmost point all at once. The duty cycle of the two channels gradually increases, and a new balance point needs to be reached, and the brush head continues to sweep to the right.

[0077] When the brush head sweeps to the rightmost, the duty cycle of the sub-pulses in the interval pulses of the second channel reaches the maximum, while the duty cycle of the sub-pulses in the interval pulses of the first channel reaches the minimum, such as Figure 6 The pulse waveform of the sub-pulse in .

[0078] Similarly, when sweeping to the left, the duty cycle of the sub-pulses in the interval pulses of the first channel will gradually increase, while the duty cycle of the sub-pulses in the interval pulses of the second channel will gradually decrease, which will not be described in detail here.

[0079] Further, such as Fig.11 , Fig.11 yes Fig.10 A flowchart of a specific implementation method of S210; S210 includes: S211, maintaining the preset duty cycle of the first composite drive pulse T1 unchanged, and taking the first composite pulse as a unit, sequentially increasing the duty cycle of the first sub-pulse of the first interval pulse in the first composite pulse; S212, maintaining the preset duty cycle of the second composite drive pulse T2 unchanged, and taking the second composite pulse as a unit, reducing the duty cycle of the second sub-pulse of the second interval pulse in the second composite pulse; wherein, the duty cycle of the first sub-pulse of each drive pulse in the first composite pulse is equal, and the duty cycle of the second sub-pulse of each drive pulse in the second composite pulse is equal.

[0080] In this embodiment, the preset duty cycle of the first composite drive pulse T1 remains unchanged, which means that the duty cycle of the interval pulse as a whole is preset and remains unchanged. The duty cycle of the first sub-pulse represents the sub-pulse of the first interval pulse (a certain interval pulse), and its duty cycle within the interval is equal, that is, the duty cycle of the sub-pulse within the interval pulse increases or decreases uniformly.

[0081] Further, such as Fig.12 , Fig.12 yes Fig.11A flowchart of a specific implementation of S220; S220 includes:

[0082] S221. Keep the preset duty cycle of the first composite drive pulse T1 unchanged, and reduce the duty cycle of the first sub-pulse of the first interval pulse in the first composite pulse in units of the first composite pulse; S222. Keep the preset duty cycle of the second composite drive pulse T2 unchanged, and increase the duty cycle of the second sub-pulse of the second interval pulse in the second composite pulse in units of the second composite pulse; wherein the duty cycle of the first sub-pulse of each drive pulse in the first composite pulse is equal, and the duty cycle of the second sub-pulse of each drive pulse in the second composite pulse is equal.

[0083] In this embodiment, the preset duty cycle of the second composite drive pulse T2 remains unchanged, which means that the interval pulse as a whole has a preset duty cycle that remains unchanged, and the second sub-pulse duty cycle represents the sub-pulses of the second interval pulse (a certain interval pulse), whose duty cycles within the interval are equal, that is, the duty cycles of the sub-pulses within the interval pulse are uniformly increased or decreased. S300, input the first composite drive pulse T1 and the second composite drive pulse T2 to the acoustic wave motor, and use the first composite drive pulse T1 and the second composite drive pulse T2 to drive the acoustic wave motor to vibrate at a high level with a spacing between them.

[0084] In a preferred embodiment, Fig.13 , Fig.13 yes Figure 7 A flowchart of a specific implementation of S300; S300 includes: S310, obtaining a first drive timing and a second drive timing, and the first drive timing and the second drive timing are sequentially and spaced apart to perform high-level driving; S320, outputting a first composite drive pulse T1 with the first drive timing, and outputting a second composite drive pulse T2 with the second drive timing to drive the acoustic wave motor to vibrate.

[0085] In this embodiment, when the interval pulse is driven at an interval high level as a whole, a vibration function is realized at each small position.

[0086] By constructing a first composite drive pulse T1 and a second composite drive pulse T2, and adjusting the first sub-pulse duty cycle of the first interval pulse in the first composite drive pulse T1 and the second sub-pulse duty cycle of the second interval pulse in the second composite drive pulse T2 at a preset step interval, the motor is swung left and right to realize the vibration and swinging functions of the sonic motor, which not only avoids the cost problem of the existing electric toothbrush using a servo motor for sweeping vibration, but also reduces the use noise of the electric toothbrush and improves the user experience.

[0087] In a second aspect, an electric toothbrush, such as Fig.14 , Fig.14This is a module structure diagram of an electric toothbrush in the present application, which adopts the sonic motor driving method of the first aspect, including:

[0088] The acquisition module 41 is used to obtain the first interval pulse of the first frequency and the first sub-pulse duty cycle and the second interval pulse of the second frequency and the second sub-pulse duty cycle, and use the first interval pulse and the second interval pulse to obtain the first composite drive pulse T1 and the second composite drive pulse T2 according to the preset duty cycle and frequency respectively.

[0089] The sweeping vibration module 43 is used to input a first composite driving pulse T1 and a second composite driving pulse T2 to the acoustic wave motor, and drive the acoustic wave motor to vibrate by using the first composite driving pulse T1 and the second composite driving pulse T2 to be spaced apart at a high level.

[0090] The adjustment module 42 is used to adjust the duty cycle of the first sub-pulse of the first interval pulse in the first composite driving pulse T1 and the duty cycle of the second sub-pulse of the second interval pulse in the second composite driving pulse T2 at a preset step interval.

[0091] Furthermore, the acquisition module 41 includes:

[0092] The first output unit is used to output a first interval pulse at a first frequency and a first sub-pulse duty cycle to obtain a first composite pulse, and output the first composite pulse at a preset frequency and a preset duty cycle to obtain a first composite drive pulse T1 composed of all first composite pulses.

[0093] The second output unit is used to output a second interval pulse at a second frequency and a second sub-pulse duty cycle to obtain a second composite pulse, and output a second composite pulse at a preset frequency and a preset duty cycle to obtain a second composite drive pulse T2 composed of all second composite pulses.

[0094] Furthermore, the adjustment module 42 includes: a first driving unit, used to increase the duty cycle of the first sub-pulse of the first interval pulse in the first composite driving pulse T1 by a preset step size, and reduce the duty cycle of the second sub-pulse of the second interval pulse in the second composite driving pulse T2 by a preset step size, so as to drive the electric toothbrush to swing in the first direction; a second driving unit, used to reduce the duty cycle of the first sub-pulse of the first interval pulse in the first composite driving pulse T1 by a preset step size, and increase the duty cycle of the second sub-pulse of the second interval pulse in the second composite driving pulse T2 by a preset step size, so as to drive the electric toothbrush to swing in the second direction.

[0095] A sonic wave motor driving method and an electric toothbrush in the present invention are implemented, and a first composite driving pulse and a second composite driving pulse are obtained by construction, and the first sub-pulse duty cycle of the first interval pulse in the first composite driving pulse and the second sub-pulse duty cycle of the second interval pulse in the second composite driving pulse are adjusted at preset step intervals to perform left and right swings, thereby realizing the vibration and swinging functions of the sonic wave motor, which not only avoids the cost problem of the existing electric toothbrush using a servo motor for sweeping vibration, but also reduces the use noise of the electric toothbrush and improves the user experience.

[0096] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for driving a sonic motor, characterized in that: include: Step 100, obtaining a first interval pulse of a first frequency and a first sub-pulse duty cycle and a second interval pulse of a second frequency and a second sub-pulse duty cycle, and using the first interval pulse and the second interval pulse to obtain a first composite drive pulse and a second composite drive pulse according to a preset duty cycle and frequency respectively; Step 200, adjusting the duty cycle of the first sub-pulse of the first interval pulse in the first composite driving pulse and the duty cycle of the second sub-pulse of the second interval pulse in the second composite driving pulse at a preset step interval; Step 300, inputting the first composite drive pulse and the second composite drive pulse into the acoustic wave motor, and utilizing the first composite drive pulse and the second composite drive pulse to drive the acoustic wave motor to vibrate and swing at a high level with a spacing therebetween; The first frequency is equal to the second frequency.

2. The method for driving a sonic motor according to claim 1, characterized in that: The step 100 comprises: Step 110, outputting the first interval pulse with a first frequency and a first sub-pulse duty cycle to obtain a first composite pulse; Step 120: output the first composite pulse at a preset frequency and a preset duty cycle to obtain a first composite driving pulse composed of all the first composite pulses.

3. The method for driving a sonic motor according to claim 2, characterized in that: The step 100 further includes: Step 130, outputting the second interval pulse with a second frequency and a second sub-pulse duty cycle to obtain a second composite pulse; Step 140: output the second composite pulse at a preset frequency and a preset duty cycle to obtain a second composite driving pulse composed of all the second composite pulses.

4. The method for driving a sonic motor according to claim 1, characterized in that: The step 300 includes: Step 310, obtaining a first driving timing and a second driving timing, wherein the first driving timing and the second driving timing are sequentially and alternately driven at a high level; Step 320: output the first composite drive pulse at the first drive timing, and output the second composite drive pulse at the second drive timing to drive the acoustic wave motor.

5. The method for driving a sonic motor according to claim 1, characterized in that: The step 200 comprises: Step 210: increasing the duty cycle of the first sub-pulse of the first interval pulse in the first composite drive pulse by a preset step length, and reducing the duty cycle of the second sub-pulse of the second interval pulse in the second composite drive pulse by a preset step length, so that the electric toothbrush swings in the first direction; Step 220, reducing the duty cycle of the first sub-pulse of the first interval pulse in the first composite drive pulse by a preset step length, and increasing the duty cycle of the second sub-pulse of the second interval pulse in the second composite drive pulse by a preset step length, so that the electric toothbrush swings in the second direction; Step 230, looping through steps 210 to 220 to make the electric toothbrush swing left and right.

6. The method for driving a sonic motor according to claim 5, characterized in that: The step 210 includes: Step 211, keeping the preset duty cycle of the first composite driving pulse unchanged, taking the first composite pulse as a unit, sequentially increasing the duty cycle of the first sub-pulse of the first interval pulse in the first composite pulse; Step 212: Keep the preset duty cycle of the second composite driving pulse unchanged, and reduce the duty cycle of the second sub-pulse of the second interval pulse in the second composite pulse, taking the second composite pulse as a unit; The duty cycle of the first sub-pulse of each driving pulse in the first composite pulse is equal, and the duty cycle of the second sub-pulse of each driving pulse in the second composite pulse is equal.

7. The method for driving a sonic motor according to claim 5, characterized in that: The step 220 includes: Step 221, keeping the preset duty cycle of the first composite driving pulse unchanged, taking the first composite pulse as a unit, sequentially reducing the duty cycle of the first sub-pulse of the first interval pulse in the first composite pulse; Step 222: Keep the preset duty cycle of the second composite driving pulse unchanged, and increase the duty cycle of the second sub-pulse of the second interval pulse in the second composite pulse in units of the second composite pulse; The duty cycle of the first sub-pulse of each driving pulse in the first composite pulse is equal, and the duty cycle of the second sub-pulse of each driving pulse in the second composite pulse is equal.

8. An electric toothbrush, using the sonic motor driving method according to any one of claims 1 to 7, characterized in that: include: An acquisition module, used for acquiring a first interval pulse of a first frequency and a first sub-pulse duty cycle and a second interval pulse of a second frequency and a second sub-pulse duty cycle, and obtaining a first composite drive pulse and a second composite drive pulse by using the first interval pulse and the second interval pulse according to a preset duty cycle and frequency respectively; an adjustment module, configured to adjust the duty cycle of a first sub-pulse of a first interval pulse in the first composite driving pulse and the duty cycle of a second sub-pulse of a second interval pulse in the second composite driving pulse at a preset step interval; The sweep vibration module is used to input the first composite driving pulse and the second composite driving pulse to the acoustic wave motor, and drive the acoustic wave motor to vibrate and swing by using the first composite driving pulse and the second composite driving pulse to be spaced apart at a high level.

9. The electric toothbrush according to claim 8, characterized in that: The acquisition module comprises: A first output unit is used to output the first interval pulse at a first frequency and a first sub-pulse duty cycle to obtain a first composite pulse, and to output the first composite pulse at a preset frequency and a preset duty cycle to obtain a first composite driving pulse composed of all first composite pulses; The second output unit is used to output the second interval pulse at a second frequency and a second sub-pulse duty cycle to obtain a second composite pulse, and to output the second composite pulse at a preset frequency and a preset duty cycle to obtain a second composite drive pulse composed of all second composite pulses.

10. The electric toothbrush according to claim 8, characterized in that: The adjustment module comprises: A first driving unit, configured to increase the duty cycle of a first sub-pulse of a first interval pulse in the first composite driving pulse by a preset step length, and simultaneously reduce the duty cycle of a second sub-pulse of a second interval pulse in the second composite driving pulse by a preset step length, so as to drive the electric toothbrush to swing in a first direction; The second driving unit is used to reduce the duty cycle of the first sub-pulse of the first interval pulse in the first composite driving pulse by a preset step size, and at the same time increase the duty cycle of the second sub-pulse of the second interval pulse in the second composite driving pulse by a preset step size, so as to drive the electric toothbrush to swing in a second direction.

Images