Electric toothbrush control method and electric toothbrush

Abstract

The invention relates to the technical field of electric toothbrushes, and provides an electric toothbrush control method and an electric toothbrush, the electric toothbrush control method comprises the following steps: motor state information is obtained, and the motor state information represents a motor operation state for driving a brush head to move; and alternately generating a first control signal lasting for the first time and a second control signal lasting for the second time according to the motor state information. Based on the first time and the second time, a first control signal and a second control signal are alternately generated, so that the operation frequency and the operation angle range of the motor are alternately changed, and the action adaptive to the Bass tooth brushing method is beneficial to improving the tooth cleaning effect; a user can clearly know the tooth cleaning period, namely accurately perceive the tooth brushing time, so that the user can movably clean other teeth after a round of first time and second time, the cleaning time of each tooth can be stabilized, and the starting time of the electric toothbrush is matched with the tooth brushing completion time of the user.

Description

Technical Field

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

[0002] Electric toothbrushes use electricity to drive the brush head to vibrate or rotate to achieve cleaning, which can help users effectively remove plaque and food residues on the surface of teeth.

[0003] However, in the prior art, when a user uses an electric toothbrush to brush their teeth, the vibration frequency and amplitude of the electric toothbrush are fixed, and cannot adapt to the action process of brushing teeth, such as the action of the Bass brushing method, resulting in poor cleaning effect. In addition, the existing electric toothbrush usually automatically shuts down after starting to work for a period of time to adapt to the brushing time, but the user lacks effective guidance during the brushing process. The time for the user to clean each tooth can only be controlled by his own perception, and there is a problem that the cleaning time for each tooth is different. In addition, the electric toothbrush is still working after the user has finished brushing his teeth, or the user has not finished brushing his teeth but the electric toothbrush is turned off, that is, the start-up time of the electric toothbrush cannot be accurately perceived by the user, resulting in inconvenience in use. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes an electric toothbrush control method to adapt to the action of the Bass brushing method and enable the user to accurately know the brushing cleaning time.

[0005] The invention also provides an electric toothbrush.

[0006] According to a first aspect of the present invention, the electric toothbrush control method comprises: Acquire motor status information, where the motor status information represents the running status of the motor driving the brush head to move; Alternately generating a first control signal lasting for a first time and a second control signal lasting for a second time according to the motor state information; The first control signal is used to control the motor to operate at a first frequency and a first angle range, and the second control signal is used to control the motor to operate at a second frequency and a second angle range, wherein the first frequency is greater than the second frequency and the first angle range is smaller than the second angle range.

[0007] The electric toothbrush control method according to the embodiment of the present invention has at least the following beneficial effects: According to the motor status information, a first control signal is generated within the first time, and after the first time, a second control signal is generated within the second time, and after the second time, the first control signal is generated again within the first time, and the cycle is repeated to alternately generate the first control signal and the second control signal. Since the first frequency is greater than the second frequency and the first angle range is less than the second angle range, within the first time, the first control signal causes the motor to operate at the first frequency and the first angle range, that is, the motor drives the brush head to vibrate at a high frequency and a small angle range to fully foam the toothpaste and penetrate into the gaps between teeth and loosen impurities; within the second time, the second control signal causes the motor to operate at the second frequency and the second angle range, that is, the motor drives the brush head to sweep at a low frequency and a large angle range to sweep impurities out of the gaps between teeth and complete a tooth cleaning. The above process is repeated alternately to achieve cleaning of each tooth. In this way, based on the first time and the second time, the first control signal and the second control signal are alternately generated, so that the motor operating frequency and the operating angle range are alternately changed, which can adapt to the action of the Bass brushing method and is beneficial to improving the teeth cleaning effect. At the same time, due to the changes in the motor operating frequency and the operating angle range, the user can clearly know the tooth cleaning cycle, that is, accurately perceive the brushing time, so that the user can move to clean other teeth after a round of the first time and the second time, which is beneficial to stabilize the cleaning time of each tooth and match the start time of the electric toothbrush with the time the user completes brushing.

[0008] According to an embodiment of the present invention, the step of alternately generating the first control signal and the second control signal based on the first time and the second time according to the motor state information includes: Record working hours and perform alternately: Generate the first control signal according to the motor state information, and keep it for the first time; Generate the second control signal according to the motor state information, and keep it for the second time; Until it is determined that the working time is equal to the time threshold, a shutdown signal is generated or the control mode is switched; The time threshold is determined by a preset setting or based on historical usage information.

[0009] According to an embodiment of the present invention, generating the first control signal according to the motor state information for the first time includes: During the first period: generating the first control signal according to the first frequency and the first angle range; Determining first feedback information according to the motor state information; According to the first feedback information, the first control signal is adjusted so that the motor operating angle range is the first angle range and the motor operating frequency is the first frequency.

[0010] According to an embodiment of the present invention, generating the second control signal according to the motor state information for the second time includes: During the second period: generating the second control signal according to the second frequency and the second angle range; Determining second feedback information according to the motor state information; According to the second feedback information, the second control signal is adjusted so that the motor operating angle range is the second angle range and the motor operating frequency is the second frequency.

[0011] According to an embodiment of the present invention, adjusting the first control signal according to the first feedback information includes: Determining a first current feedback parameter, a first angle feedback parameter, and a first speed feedback parameter according to the first feedback information; determining a first speed adjustment parameter according to the first angle feedback parameter, the first frequency, and the first angle range; determining a first current adjustment parameter according to the first speed feedback parameter and the first speed adjustment parameter; The first control signal is determined according to the first current feedback parameter and the first current adjustment parameter.

[0012] According to an embodiment of the present invention, adjusting the second control signal according to the second feedback information includes: Determining a second current feedback parameter, a second angle feedback parameter, and a second speed feedback parameter according to the second feedback information; determining a second speed adjustment parameter according to the second angle feedback parameter, the second frequency, and the second angle range; determining a second current adjustment parameter according to the second speed feedback parameter and the second speed adjustment parameter; The second control signal is determined according to the second current feedback parameter and the second current adjustment parameter.

[0013] According to one embodiment of the present invention, before acquiring the motor status information, the method further includes: In response to the operation instruction, determining the working mode according to the operation instruction; Wherein, the working mode includes a Bass brushing mode, and if the working mode is determined to be the Bass brushing mode, the step of obtaining the motor status information is executed.

[0014] According to one embodiment of the present invention, it also includes: generating historical usage information according to the motor status information; According to the historical usage information, the time threshold, the first time, the first frequency, the first angle range, the second time, the second frequency or the second angle range is adjusted.

[0015] According to one embodiment of the present invention, the time threshold is 3 minutes, the first time is 1 second, the first angle range is 0° to 10°, the first frequency is 24600 Hz, the second time is 2 seconds, the second angle range is 0° to 60°, and the second frequency is 31 Hz.

[0016] An electric toothbrush according to a second aspect of the present invention comprises: matrix; A motor module is arranged on the base, and the motor module is provided with a driving rod; A brush head connected to the driving rod; A detection module is arranged on the base, and the detection module is connected to the motor module; A control module is arranged on the base, and the control module is connected to the motor module; Wherein, the control module is used to execute the above-mentioned electric toothbrush control method.

[0017] The electric toothbrush according to the embodiment of the present invention has at least the following beneficial effects: Under the control of the control module, the motor module drives the brush head to move, and the detection module detects the motor status information of the motor module and transmits it to the control module, so that the control module can know the operating status of the motor module and adjust the control signal. According to the motor status information, the control module generates a first control signal within the first time, generates a second control signal within the second time after the first time, and generates the first control signal again within the first time after the second time, and repeats the cycle to alternately generate the first control signal and the second control signal. The first control signal causes the motor module to operate at a first frequency and a first angle range, and the second control signal causes the motor module to operate at a second frequency and a second angle range. Since the first frequency is greater than the second frequency and the first angle range is less than the second angle range, the motor module drives the brush head to vibrate at a high frequency and a small angle range within the first time to fully foam the toothpaste and penetrate into the gaps between teeth and loosen impurities; within the second time, the motor module drives the brush head to sweep at a low frequency and a large angle range to sweep impurities out of the gaps between teeth and complete a tooth cleaning. The above process is cycled alternately to achieve cleaning of each tooth. In this way, the control module alternately generates the first control signal and the second control signal based on the first time and the second time, so that the operating frequency and the operating angle range of the motor module are alternately changed, which can adapt to the action of the Bass brushing method and is beneficial to improving the teeth cleaning effect. At the same time, due to the changes in the operating frequency and the operating angle range of the motor module, the user can clearly know the tooth cleaning cycle through the movement changes of the brush head, which is convenient for the user to move to clean other teeth after a round of the first time and the second time, which is beneficial to stabilize the cleaning time of each tooth and match the start time of the electric toothbrush with the time the user completes brushing.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a flow chart of an electric toothbrush control method provided by an embodiment of the present invention; Figure 2 It is a schematic structural diagram of the electric toothbrush provided by the present invention.

[0021] Reference numerals: 100, base; 200, motor module; 300, brush head; 400, detection module; 500, control module. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] According to the Bass brushing method, during the brushing process, the brush head of the toothbrush is required to vibrate slightly for several times over a short distance to fully foam the toothpaste and loosen food residues, and then sweep along the teeth for a short distance to remove food residues and other impurities in the teeth and fully clean the teeth. Electric toothbrushes with fixed vibration frequency and amplitude cannot adapt to the above two processes of slight vibration and short-distance sweeping.

[0028] In order to adapt to the Bass brushing method and improve the efficiency and effect of tooth cleaning, refer to Figure 1 The electric toothbrush control method provided by the present invention comprises: Acquire motor status information, where the motor status information represents the running status of the motor driving the brush head to move; Alternately generating a first control signal lasting a first time and a second control signal lasting a second time according to the motor state information; The first control signal is used to control the motor to operate at a first frequency and a first angle range, and the second control signal is used to control the motor to operate at a second frequency and a second angle range. The first frequency is greater than the second frequency and the first angle range is smaller than the second angle range.

[0029] According to the motor status information, a first control signal is generated within the first time, and after the first time, a second control signal is generated within the second time, and after the second time, the first control signal is generated again within the first time, and the cycle is repeated to alternately generate the first control signal and the second control signal. Since the first frequency is greater than the second frequency and the first angle range is less than the second angle range, within the first time, the first control signal causes the motor to operate at the first frequency and the first angle range, that is, the motor drives the brush head to vibrate at a high frequency and a small angle range to fully foam the toothpaste and penetrate into the gaps between teeth and loosen impurities; within the second time, the second control signal causes the motor to operate at the second frequency and the second angle range, that is, the motor drives the brush head to sweep at a low frequency and a large angle range to sweep impurities out of the gaps between teeth and complete a tooth cleaning. The above process is repeated alternately to achieve cleaning of each tooth.

[0030] In this way, based on the first time and the second time, the first control signal and the second control signal are alternately generated, so that the motor operating frequency and the operating angle range are alternately changed, which can adapt to the brushing action of the Bass brushing method. Specifically, the brush head is vibrated in a high-frequency and small-angle range in the first time to adapt to the slight vibration process of the Bass brushing method, and then the brush head is swept in a low-frequency and large-angle range in the second time to adapt to the short-distance sweeping process of the Bass brushing method, which is beneficial to improve the teeth cleaning effect.

[0031] At the same time, due to the changes in the motor's operating frequency and operating angle range, when the frequency and angle are switched alternately, the user can clearly know the tooth cleaning cycle, that is, accurately perceive the brushing time, so that the user can move to clean other teeth after a round of the first time and the second time, that is, a tooth cleaning cycle. This is conducive to stabilizing the cleaning time of each tooth and matching the start time of the electric toothbrush with the time the user completes brushing.

[0032] It is understandable that the first time and the second time may be equal or unequal, and a round of the first time and the second time combined may be regarded as a teeth cleaning cycle. For example, in some embodiments of the present invention, the first time is 1 second, the second time is 2 seconds, and a teeth cleaning cycle is 3 seconds. The user completes the cleaning of the teeth, gums and teeth in the cleaning position within 3 seconds, and then moves to the next cleaning position. The user can accurately know the time of movement according to the changes in the frequency and angle of the brush head, balance the cleaning time of each cleaning position, and accurately match the brushing time with the brushing progress, thereby avoiding the situation where the electric toothbrush is still working after the user has finished brushing his teeth or the electric toothbrush is turned off before the user has finished brushing his teeth, thereby improving the user's experience.

[0033] In some embodiments of the present invention, the motor state information may include state information such as rotation angle, speed, current, etc., and may be obtained by detecting the motor through devices such as Hall sensors and encoders.

[0034] refer to Figure 1 In some embodiments of the electric toothbrush control method of the present invention, according to the motor state information, based on the first time and the second time, the first control signal and the second control signal are alternately generated, including: Record working hours and perform alternately: Generate a first control signal according to the motor state information, for a first time; Generate a second control signal according to the motor state information, which lasts for a second time; Until it is determined that the working time is equal to the time threshold, a shutdown signal is generated or the control mode is switched; The time threshold is determined by a preset setting or based on historical usage information.

[0035] When the motor starts to work, the working time is recorded to control the total brushing time. According to the motor state information, based on the first time and the second time, the first control signal and the second control signal are alternately generated to make the motor work alternately at different operating frequencies and operating angle ranges until the working time reaches the time threshold, and a shutdown signal is generated to stop the motor, or the working mode is switched to control the motor to work in other modes, such as a mode with a stable operating frequency and operating angle range. In this way, by recording the working time and comparing the working time with the time threshold, the time for alternating switching of the motor operating frequency and the operating angle range, that is, the time for Bass brushing, is controlled, which is conducive to making the use more convenient and reducing user operations.

[0036] It can be understood that, according to usage requirements, when the working time reaches the time threshold, that is, after a round of cleaning of the teeth is completed, it can be switched to the tongue cleaning mode, and a third control signal is generated for a third time. The third control signal allows the motor to operate at a stable operating frequency and operating angle range to facilitate the user to clean the tongue; it can also generate a shutdown signal to let the motor directly stop driving the brush head to move.

[0037] The vibration frequency and amplitude of the relevant electric toothbrush are fixed, that is, the control signal remains unchanged during the brushing process. However, when the bristles of the brush head come into contact with the teeth during the brushing process, a force is exerted on the brush head, thereby weakening the movement frequency or amplitude of the brush head. In addition, different users use different strengths, which makes the force between the brush head and the teeth different, that is, the impact on the movement of the brush head is different, resulting in the movement of the brush head unable to reach the required frequency and angle range, thereby affecting the cleaning effect of brushing.

[0038] For the above problem, in some embodiments of the electric toothbrush control method of the present invention, a first control signal is generated according to the motor state information for a first time, including: In the first place: Generate a first control signal according to the first frequency and the first angle range; Determining first feedback information according to the motor state information; According to the first feedback information, the first control signal is adjusted so that the motor operating angle range is a first angle range and the motor operating frequency is a first frequency.

[0039] During the alternating process, in the first time, firstly, according to the required first frequency and first angle range, an initial first control signal is generated, and then according to the motor state information, the first feedback information is determined, and then feedback adjustment is performed according to the first feedback information, and based on the actual motor operation, the first control signal is adjusted so that the actual operating angle range of the motor is the required first angle range, and the actual operating frequency of the motor is the required first frequency. In this way, through feedback adjustment, it is possible to avoid the force between the brush head and the teeth affecting the actual movement of the brush head, and at the same time, it can also adapt to the use strength of different users, so that the motor drives the brush head to move under different forces with the teeth, and the motor can be stabilized in the required operating frequency and operating angle range, that is, the brush head maintains the required vibration frequency and vibration angle range, which is conducive to improving the cleaning effect of brushing teeth.

[0040] In some embodiments of the electric toothbrush control method of the present invention, generating a second control signal for a second time according to the motor state information includes: In the second time: generating a second control signal according to the second frequency and the second angle range; Determining second feedback information according to the motor state information; According to the second feedback information, the second control signal is adjusted so that the motor operating angle range is a second angle range and the motor operating frequency is a second frequency.

[0041] Similar to the first time, during the alternating process, during the second time, firstly, according to the required second frequency and second angle range, an initial second control signal is generated, and then according to the motor state information, the second feedback information is determined, and then feedback adjustment is performed according to the second feedback information, and based on the actual motor operation, the second control signal is adjusted so that the actual operating angle range of the motor is the required second angle range, and the actual operating frequency of the motor is the required second frequency. In this way, through feedback adjustment, it is possible to avoid the force between the brush head and the teeth affecting the actual movement of the brush head, and at the same time, it can also adapt to the use strength of different users, so that the motor drives the brush head to move under different forces with the teeth, and the motor can be stabilized in the required operating frequency and operating angle range, that is, the brush head maintains the required vibration frequency and vibration angle range, which is conducive to improving the cleaning effect of brushing teeth.

[0042] In some embodiments of the electric toothbrush control method of the present invention, adjusting the first control signal according to the first feedback information includes: Determine a first current feedback parameter, a first angle feedback parameter, and a first speed feedback parameter according to the first feedback information; Determining a first speed adjustment parameter according to the first angle feedback parameter, the first frequency, and the first angle range; Determining a first current adjustment parameter according to the first speed feedback parameter and the first speed adjustment parameter; A first control signal is determined according to the first current feedback parameter and the first current adjustment parameter.

[0043] In the first time, the current angle position of the motor can be known according to the first angle feedback parameter, and the angle position of the next motor can be known in combination with the required first frequency and the first angle range, so as to determine the first speed adjustment parameter. The current speed of the motor can be known according to the first speed feedback parameter, and the first current adjustment parameter can be determined based on the difference between the first speed feedback parameter and the first speed adjustment parameter. The speed and torque of the motor are controlled by the working current. The first current adjustment parameter can adjust the working current of the motor so that the actual working state of the motor meets the requirements. According to the first current feedback parameter, the working current of the current motor can be known, and the first control signal can be determined in combination with the first current adjustment parameter, so that under the control of the first control signal, the actual operating frequency and operating angle range of the motor under the action of the working current meet the requirements of the first frequency and the first angle range. In this way, feedback control of the motor based on angle position, speed, and current is realized, which is conducive to making the motor run more stable and matching the vibration frequency and vibration angle range of the brush head actually driven with the target required frequency and angle range.

[0044] In some embodiments of the present invention, the first angle range is 0° to 10°, the first frequency is 24600 Hz, and the current, rotation angle and speed of the motor are obtained as the first feedback information based on the motor state information at the first time. According to the first angle feedback parameter, if the current detection feedback angle is 10°, the target angle of the motor at each moment can be determined based on the first frequency and the first angle range. If the next target angle of 10° is 9°, it is necessary to control the motor rotation to avoid exceeding the range of 10°. At the same time, in order to achieve the first frequency, the motor needs to work at the target speed. Since the motor needs to rotate back and forth between 0° and 10°, the process requires the motor to repeat the process of deceleration, change the direction of rotation, and acceleration. The motor may be ahead of or behind the target angle. The target speed is determined accordingly based on the size of the advance and lag, so that the actual angle is synchronized with the target angle and the actual frequency is consistent with the first frequency. Based on this, the first speed adjustment parameter is determined according to the next target angle and the target speed. Since the motor speed control ultimately needs to be achieved through current control, after determining the first speed adjustment parameter, the current adjustment ratio required, i.e., the first current adjustment parameter, is determined based on the difference between the current motor speed, i.e., the first speed feedback parameter. The greater the difference between the first speed adjustment parameter and the first speed feedback parameter, the greater the current adjustment ratio required. During actual brushing, the contact area and pressure between the brush head and the teeth change, which will change the load of the motor. When the pressure of the brush head increases, i.e., the motor load increases, the motor needs a greater torque to maintain the speed unchanged. The motor torque is determined by the current. In order to achieve the same target speed under different motor load conditions, the corresponding specific current size is different. Therefore, after determining the first current adjustment parameter, it is necessary to combine the first current feedback parameter, i.e., the actual motor current, to finally determine the first control signal. For example, the first current adjustment parameter requires the current to increase by 5%. Under light load conditions, the equivalent current that currently generates torque may be 500 mA, so the equivalent current that actually controls the motor to generate torque needs to be adjusted to 525 mA. Under heavy load conditions, the equivalent current may be 1000 mA, so the equivalent current needs to be adjusted to 1050 mA. The corresponding motor speeds are the same after adjustment for the two different load conditions. In this way, during the brushing process, the motor load changes due to the user's force and the change of the brush head position. Through the feedback adjustment of the angle, speed and current, the motor can be stably operated within the first angle range and the first frequency within the corresponding first time, thereby improving the stability of the motor operation.

[0045] In some embodiments of the electric toothbrush control method of the present invention, adjusting the second control signal according to the second feedback information includes: Determining a second current feedback parameter, a second angle feedback parameter, and a second speed feedback parameter according to the second feedback information; Determining a second speed adjustment parameter according to the second angle feedback parameter, the second frequency, and the second angle range; Determining a second current adjustment parameter according to the second speed feedback parameter and the second speed adjustment parameter; A second control signal is determined according to the second current feedback parameter and the second current adjustment parameter.

[0046] In the second time, the current angle position of the motor can be known according to the second angle feedback parameter, and the angle position of the next motor can be known in combination with the required second frequency and the second angle range, so as to determine the second speed adjustment parameter. The current speed of the motor can be known according to the second speed feedback parameter, and the second current adjustment parameter can be determined based on the difference between the second speed feedback parameter and the second speed adjustment parameter. The speed and torque of the motor are controlled by the working current. The second current adjustment parameter can adjust the working current of the motor so that the actual working state of the motor meets the requirements. According to the second current feedback parameter, the current working current of the motor can be known, and the second control signal can be determined in combination with the second current adjustment parameter, so that under the control of the second control signal, the actual operating frequency and operating angle range of the motor under the action of the working current meet the requirements of the second frequency and the second angle range. In this way, feedback control of the motor based on angle position, speed, and current is realized, which is conducive to making the motor run more stable and matching the vibration frequency and vibration angle range of the brush head actually driven with the target required frequency and angle range.

[0047] In some embodiments of the present invention, the second angle range is 0° to 60°, the second frequency is 31 Hz, and the current, rotation angle, and speed of the motor are obtained as the second feedback information based on the motor state information at the second time. According to the second angle feedback parameter, if the current detection feedback angle is 30°, the target angle of the motor at each moment can be determined based on the second frequency and the second angle range, such as the next target angle of 30° is 35°. At the same time, in order to achieve the second frequency, the motor needs to work at the target speed. When the motor runs at 31 Hz from 0° to 60°, the average speed of the motor should be 60°×31=1860° / s, which is equivalent to 1860 / 360≈5 revolutions per second. However, since the motor needs to rotate back and forth from 0° to 60°, this process requires the motor to repeatedly decelerate, change the direction of rotation, and accelerate. The actual motor will not run at a speed of 1860° / s. There will be speed fluctuations and the actual angle of the motor may be ahead of or behind the target angle. The target speed is determined based on the size of the advance and lag. For example, when it lags behind, 1900° / s may be the target speed, so that the actual angle is synchronized with the target angle and the actual frequency is consistent with the second frequency. Based on this, the second speed adjustment parameter is determined according to the next target angle and target speed. Since the speed control of the motor ultimately needs to be achieved through current control, after determining the second speed adjustment parameter, the current adjustment ratio required is determined based on the difference between the current motor speed, i.e., the second speed feedback parameter, i.e., the second current adjustment parameter. The greater the difference between the second speed adjustment parameter and the second speed feedback parameter, the greater the current adjustment ratio. For example, when the target speed is 1900° / s and the current speed is 1800° / s, the current adjustment degree is greater than when the current speed is 1850° / s. During actual brushing, the area and pressure of the brush head in contact with the teeth change, which will change the load of the motor. When the pressure of the brush head increases, i.e., the motor load increases, the motor needs a greater torque to maintain the speed unchanged. In order to achieve the same target speed under different motor load conditions, the corresponding specific current size is different. Therefore, after determining the second current adjustment parameter, it is necessary to combine the second current feedback parameter, i.e., the actual motor current, to finally determine the second control signal. For example, the second current adjustment parameter requires the current to increase by 5%. Under light load conditions, the equivalent current that currently generates torque may be 500 mA, so the equivalent current that actually controls the motor to generate torque needs to be adjusted to 525 mA. Under heavy load conditions, the current equivalent current may be 1000 mA, so the equivalent current needs to be adjusted to 1050 mA. The corresponding motor speeds are the same after adjustment for the two different load conditions. In this way, during the brushing process, the motor load changes due to the user's force and the change of the brush head position, through the feedback adjustment of the angle, speed and current, the motor can be stably operated within the second angle range and the second frequency within the corresponding second time, thereby improving the stability of the motor operation.

[0048] It should be noted that the feedback adjustment and determination process of the first control signal and the second control signal is schematic. In actual application, the motor may be based on three-phase power control, but the principle of feedback adjustment remains unchanged.

[0049] In some embodiments of the present invention, the first control signal is adjusted according to the first feedback information, and the second control signal is adjusted according to the second feedback information, and the first control signal and the second control signal may be determined by a FOC (Field Oriented Control) algorithm.

[0050] In some embodiments of the electric toothbrush control method of the present invention, before obtaining the motor state information, the method further includes: In response to the operation instruction, determine the working mode according to the operation instruction; Among them, the working mode includes the Bass brushing mode, and if the working mode is determined to be the Bass brushing mode, the motor state information is obtained.

[0051] In order to meet the different needs of users, electric toothbrushes can have multiple working modes, for example, the working modes include Bass brushing mode, tongue coating cleaning mode, etc. When using an electric toothbrush, the user operates the electric toothbrush according to the needs, generates an operating instruction to select the required working mode, and the electric toothbrush determines the working mode according to the operating instruction to work. In this way, the use of the electric toothbrush can be made more flexible and convenient.

[0052] When the working mode is the Bass brushing mode, the motor status information is obtained, and according to the motor status information, based on the first time and the second time, the first control signal and the second control signal are alternately generated, so that the brush head alternately switches the operating frequency and the operating angle range, which is compatible with the actions of the Bass brushing method, and can also guide the user to implement the Bass brushing method, which is beneficial to improving the brushing cleaning effect.

[0053] In some embodiments of the present invention, the operation instruction may be generated by a user pressing a button or performing touch interaction on a sensor.

[0054] In some embodiments of the electric toothbrush control method of the present invention, the method further includes: Generate historical usage information based on motor status information; According to the historical usage information, the time threshold, the first time, the first frequency, the first angle range, the second time, the second frequency or the second angle range is adjusted.

[0055] According to the motor status information, the motor operation status during the brushing process can be known, including the angle, speed, current and other parameters of the motor operation. According to the change of the motor operation status, the strength of the user during the brushing process can be inferred. The greater the user's strength, the greater the force between the brush head and the teeth, and the greater the impact on the angle, speed, current and other parameters of the motor operation. It can be understood that the feedback adjustment can make the actual operation of the motor drive the vibration frequency and vibration angle range of the brush head to match the required frequency and angle range, but the adjustment parameters of the feedback adjustment process can reflect the user's strength changes and influences. At the same time, the user's brushing time is reflected according to the time of each motor operation. Accordingly, according to the motor status information, historical usage information related to the user's usage habits can be generated, and the user's strength changes, brushing time and other information during the brushing process can be known, and then the time threshold, the first time and the first frequency, the first angle range, the second time, the second frequency or the second angle range are adjusted to make the operation state of the electric toothbrush more in line with the user's usage habits, which is conducive to improving the user experience.

[0056] The time threshold is determined based on the first time, the second time and the number of teeth. Due to different oral conditions of users, such as different numbers and sizes of teeth, the required brushing time will also be different. In some embodiments of the present invention, adjustment is made based on historical usage information. It can be based on the total running time of the motor. For example, when the working time reaches the time threshold and the motor is automatically shut down, the user can set an interval time range within a short period of time, restart the motor and then manually shut down the motor. This means that the automatic shutdown working time cannot meet the user's brushing time requirements and the time threshold needs to be increased. The time for restarting the motor and then manually shutting it down can be increased on the basis of the original time threshold for adjustment.

[0057] In some embodiments of the present invention, the user force change curve can be determined based on historical usage information, and then the first time and the second time can be adjusted. During the user's brushing process, the time spent moving and switching the cleaning position may be different. The time spent for the user to move the brush head to switch the cleaning position can be indirectly known based on the force change curve, and the first time and the second time can be adjusted accordingly.

[0058] In some embodiments of the electric toothbrush control method of the present invention, the time threshold is 3 minutes, the first time is 1 second, the first angle range is 0° to 10°, the first frequency is 24600 Hz, the second time is 2 seconds, the second angle range is 0° to 60°, and the second frequency is 31 Hz.

[0059] The brush head is driven to vibrate at a high frequency of 24,600 Hz within 1 second within an angle range of 0° to 10° to fully foam the toothpaste and penetrate into the gaps between teeth and loosen impurities such as food residues; after 1 second, the brush head is driven to sweep at a short distance within an angle range of 0° to 60° within 2 seconds at a low frequency of 31 Hz to sweep impurities out from the gaps between teeth; the above process is repeated, with a cleaning cycle of 3 seconds for 3 minutes to complete the brushing process matching the Bass brushing method.

[0060] It is understood that the above specific values ​​are initial setting values, and in the embodiment where the parameter adjustment is performed according to the historical usage information, the adjustment can be performed according to the user habits reflected by the historical usage information. In the embodiment where the automatic adjustment is not performed according to the historical usage information, the above values ​​can be manually adjusted by the user.

[0061] The electric toothbrush provided by the present invention is described below. The electric toothbrush described below and the electric toothbrush control method described above can be referenced to each other.

[0062] refer to Figure 2 The present invention also provides an electric toothbrush, comprising: Base body 100; The motor module 200 is disposed on the base 100 and is provided with a driving rod; The brush head 300 is connected to the driving rod; The detection module 400 is disposed on the base 100 and connected to the motor module 200; The control module 500 is disposed on the base 100 and connected to the motor module 200; The control module 500 is used to execute the above-mentioned electric toothbrush control method.

[0063] Under the control of the control module 500, the motor module 200 drives the brush head 300 to move, and the detection module 400 detects the motor status information of the motor module 200 and transmits it to the control module 500, so that the control module 500 can know the operating status of the motor module 200 and then adjust the control signal.

[0064] The control module 500 generates a first control signal within a first time according to the motor state information, generates a second control signal within a second time after the first time, and generates the first control signal again within the first time after the second time, and repeats the cycle to alternately generate the first control signal and the second control signal. The first control signal causes the motor module 200 to operate at a first frequency and a first angle range, and the second control signal causes the motor module 200 to operate at a second frequency and a second angle range. Since the first frequency is greater than the second frequency and the first angle range is less than the second angle range, the motor module 200 drives the brush head 300 to vibrate at a high frequency and a small angle range within the first time to fully foam the toothpaste and penetrate into the gaps between teeth and loosen impurities; within the second time, the motor module 200 drives the brush head 300 to sweep at a low frequency and a large angle range to sweep impurities out of the gaps between teeth, completing a tooth cleaning. The above process is repeated alternately to achieve cleaning of each tooth.

[0065] In this way, the control module 500 alternately generates the first control signal and the second control signal based on the first time and the second time, so that the operating frequency and the operating angle range of the motor module 200 are alternately changed, which can adapt to the action of the Bass brushing method and is beneficial to improving the teeth cleaning effect. At the same time, due to the changes in the operating frequency and the operating angle range of the motor module 200, the user can clearly know the tooth cleaning cycle through the movement changes of the brush head 300, which is convenient for the user to move to clean other teeth after a round of the first time and the second time, which is beneficial to stabilize the cleaning time of each tooth and match the start time of the electric toothbrush with the time the user completes brushing.

[0066] In some embodiments of the electric toothbrush of the present invention, the motor module 200 includes a servo brushless motor and a driving rod, the servo brushless motor is arranged on the base 100, one end of the driving rod is connected to the servo brushless motor, and the other end of the driving rod forms a driving rod portion. The servo brushless motor drives the brush head 300 to move through the driving rod.

[0067] In some embodiments of the electric toothbrush of the present invention, the detection module 400 includes a Hall sensor disposed on the base 100 .

[0068] In some embodiments of the electric toothbrush of the present invention, the control module 500 may be a device, circuit or module including a single chip microcomputer, an embedded chip, etc. that can realize control processing functions.

[0069] In some embodiments of the electric toothbrush of the present invention, a circuit board, a battery and a charging interface module are also included in the base 100. The control module 500 and the motor module 200 are electrically connected through the circuit board. The battery supplies power to the control module 500 and the motor module 200 through the circuit board, and the charging interface module is electrically connected to the battery.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. An electric toothbrush control method, characterized in that: include: Acquire motor status information, where the motor status information represents the running status of the motor driving the brush head to move; Alternately generating a first control signal lasting for a first time and a second control signal lasting for a second time according to the motor state information; The first control signal is used to control the motor to operate at a first frequency and a first angle range, and the second control signal is used to control the motor to operate at a second frequency and a second angle range, wherein the first frequency is greater than the second frequency and the first angle range is smaller than the second angle range.

2. The electric toothbrush control method according to claim 1, characterized in that: The step of alternately generating the first control signal and the second control signal based on the first time and the second time according to the motor state information comprises: Record working hours and perform alternately: Generate the first control signal according to the motor state information, and keep it for the first time; Generate the second control signal according to the motor state information, and keep it for the second time; Until it is determined that the working time is equal to the time threshold, a shutdown signal is generated or the control mode is switched; The time threshold is determined by a preset setting or based on historical usage information.

3. The electric toothbrush control method according to claim 2, characterized in that: The step of generating the first control signal according to the motor state information and lasting for the first time includes: During the first period: generating the first control signal according to the first frequency and the first angle range; Determining first feedback information according to the motor state information; According to the first feedback information, the first control signal is adjusted so that the motor operating angle range is the first angle range and the motor operating frequency is the first frequency.

4. The electric toothbrush control method according to claim 2, characterized in that: The step of generating the second control signal according to the motor state information and lasting for the second time includes: During the second period: generating the second control signal according to the second frequency and the second angle range; Determining second feedback information according to the motor state information; According to the second feedback information, the second control signal is adjusted so that the motor operating angle range is the second angle range and the motor operating frequency is the second frequency.

5. The electric toothbrush control method according to claim 3, characterized in that: The adjusting the first control signal according to the first feedback information includes: Determining a first current feedback parameter, a first angle feedback parameter, and a first speed feedback parameter according to the first feedback information; determining a first speed adjustment parameter according to the first angle feedback parameter, the first frequency, and the first angle range; determining a first current adjustment parameter according to the first speed feedback parameter and the first speed adjustment parameter; The first control signal is determined according to the first current feedback parameter and the first current adjustment parameter.

6. The electric toothbrush control method according to claim 4, characterized in that: The adjusting the second control signal according to the second feedback information includes: Determining a second current feedback parameter, a second angle feedback parameter, and a second speed feedback parameter according to the second feedback information; determining a second speed adjustment parameter according to the second angle feedback parameter, the second frequency, and the second angle range; determining a second current adjustment parameter according to the second speed feedback parameter and the second speed adjustment parameter; The second control signal is determined according to the second current feedback parameter and the second current adjustment parameter.

7. The electric toothbrush control method according to claim 1, characterized in that: Before obtaining the motor status information, the method further includes: In response to the operation instruction, determining the working mode according to the operation instruction; Wherein, the working mode includes a Bass brushing mode, and if the working mode is determined to be the Bass brushing mode, the step of obtaining the motor status information is executed.

8. The electric toothbrush control method according to claim 1, characterized in that: Also includes: generating historical usage information according to the motor status information; According to the historical usage information, the time threshold, the first time, the first frequency, the first angle range, the second time, the second frequency or the second angle range is adjusted.

9. The electric toothbrush control method according to claim 1, characterized in that: The time threshold is 3 minutes, the first time is 1 second, the first angle range is 0° to 10°, the first frequency is 24600 Hz, the second time is 2 seconds, the second angle range is 0° to 60°, and the second frequency is 31 Hz.

10. An electric toothbrush, characterized in that include: Base(100); A motor module (200) is arranged on the base (100), and the motor module (200) is provided with a driving rod; A brush head (300) connected to the driving rod; A detection module (400) is arranged on the base (100), and the detection module (400) is connected to the motor module (200); A control module (500) is arranged on the base (100), and the control module (500) is connected to the motor module (200); Wherein, the control module (500) is used to execute the electric toothbrush control method according to any one of claims 1 to 9.

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