Electric toothbrush

Abstract

The utility model provides an electric toothbrush, and relates to the technical field of oral cavity cleaning. The electric toothbrush comprises a brush handle, a circuit board, a two-way motor and a brush head, the circuit board is connected with the two-way motor, the circuit board and the two-way motor are both arranged in the brush handle, and the two-way motor is connected with the brush head; wherein the circuit board is used for outputting a first driving signal and a second driving signal; the bidirectional motor is used for driving the brush head to generate first motion relative to the brush handle based on the first driving signal; the bidirectional motor is used for driving the brush head to generate second motion relative to the brush handle based on the second driving signal; wherein the movement directions of the first movement and the second movement are different; and the circuit board outputs a first driving signal and a second driving signal at the same time, so that the brush head does a combined motion of the first motion and the second motion. According to the utility model, the brush head can perform combined motion in two different directions to clean the oral cavity, and the tooth cleaning capability of the brush head is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oral cleaning, and more specifically to an electric toothbrush in the technical field of oral cleaning. Background Art

[0002] Electric toothbrushes can use a motor to drive the brush head to scrape the surface of teeth to clean the teeth. In the related art, there are two motion modes: the motor drives the brush head to generate high-frequency vibration or rotation. However, these two motion modes of electric toothbrushes have limited cleaning ability for teeth, and users need to use horizontal or vertical brushing techniques on the teeth to achieve the desired cleaning effect.

[0003] Therefore, how to improve the cleaning ability of electric toothbrushes on teeth is a problem that urgently needs to be solved. Utility Model Content

[0004] The utility model provides an electric toothbrush. The electric toothbrush can make the brush head perform combined movements in two different directions to clean the oral cavity, thereby improving the cleaning ability of the electric toothbrush on teeth.

[0005] In a first aspect, an electric toothbrush is provided, the electric toothbrush comprising a brush handle, a circuit board, a bidirectional motor and a brush head, the circuit board is connected to the bidirectional motor and both the circuit board and the bidirectional motor are arranged in the brush handle, and the bidirectional motor is connected to the brush head; wherein,

[0006] The circuit board is used to output a first driving signal and a second driving signal; and

[0007] The bidirectional motor is used to drive the brush head to produce a first movement relative to the brush handle based on the first drive signal; and the bidirectional motor is used to drive the brush head to produce a second movement relative to the brush handle based on the second drive signal;

[0008] The first movement and the second movement have different movement directions; the circuit board simultaneously outputs the first drive signal and the second drive signal to make the brush head perform a combined movement of the first movement and the second movement.

[0009] In combination with the first aspect, in some implementations of the first aspect, the bidirectional motor includes a first drive mechanism and a second drive mechanism; both the first drive mechanism and the second drive mechanism are connected to the brush head; wherein,

[0010] The first driving mechanism is used to drive the brush head to generate the first motion based on the first driving signal; the second driving mechanism is used to drive the brush head to generate the second motion based on the second driving signal.

[0011] Optionally, the first movement also includes reciprocating movement with the above-mentioned brush head length extension direction as the axis.

[0012] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the above-mentioned first driving mechanism is used to drive the above-mentioned brush head to swing back and forth with the above-mentioned brush head length extension direction as the axis based on the above-mentioned first driving signal; the above-mentioned second driving mechanism is used to drive the above-mentioned brush head to reciprocate along the above-mentioned brush head length extension direction based on the above-mentioned second driving signal.

[0013] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the first driving mechanism and the second driving mechanism are arranged along the extension direction of the brush handle.

[0014] In combination with the first aspect and the above-mentioned implementation manner, in some implementation manners of the first aspect, the above-mentioned bidirectional motor further includes a first output shaft and a second output shaft; the above-mentioned first output shaft is different from the above-mentioned second output shaft, the above-mentioned first output shaft is connected to the above-mentioned first driving mechanism, and the above-mentioned second output shaft is connected to the above-mentioned second driving mechanism; the above-mentioned first output shaft and the above-mentioned second output shaft are both connected to the above-mentioned brush head; wherein,

[0015] The first output shaft is used to drive the brush head to perform the first movement under the first driving signal; and the second output shaft is used to drive the brush head to perform the second movement under the second driving signal; wherein the first output shaft is connected to the second output shaft.

[0016] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the above-mentioned bidirectional motor also includes a third output shaft; the above-mentioned third output shaft is respectively connected to the above-mentioned first driving mechanism and the above-mentioned second driving mechanism; the above-mentioned third output shaft is connected to the above-mentioned brush head; the above-mentioned third output shaft is used to drive the above-mentioned brush head to perform the above-mentioned first movement under the above-mentioned first driving signal; and the above-mentioned third output shaft is used to drive the above-mentioned brush head to perform the above-mentioned second movement under the above-mentioned second driving signal.

[0017] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the vibration frequency of the above-mentioned first movement is equal to the vibration frequency of the above-mentioned second movement; and / or, the driving frequency of the above-mentioned first driving signal is equal to the driving frequency of the above-mentioned second driving signal.

[0018] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the swing amplitude of the above-mentioned first movement is less than or equal to the movement amplitude of the above-mentioned second movement; and / or, the duty cycle of the above-mentioned first drive signal is less than or equal to the duty cycle of the above-mentioned second drive signal.

[0019] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, there is a preset time difference between the output time of the above-mentioned first drive signal and the output time of the above-mentioned second drive signal; wherein the above-mentioned preset time difference is the sum of N cycle durations and one-quarter cycle duration; or, the above-mentioned preset time difference is the sum of N cycle durations and three-quarter cycle durations; the above-mentioned cycle duration is the duration of a single complete output of the above-mentioned first drive signal or the above-mentioned second drive signal; N is an integer greater than or equal to 0.

[0020] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the above-mentioned circuit board is also used to: suspend outputting the above-mentioned first drive signal and the above-mentioned second drive signal, and output a single drive signal; wherein the above-mentioned single drive signal is the above-mentioned first drive signal or the above-mentioned second drive signal; suspend outputting the above-mentioned single drive signal, and output the above-mentioned first drive signal and the above-mentioned second drive signal at the same time again.

[0021] In combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, the vibration frequency of the above-mentioned first movement is greater than the vibration frequency of the above-mentioned second movement; and / or, the driving frequency of the above-mentioned first driving signal is greater than the driving frequency of the above-mentioned second driving signal.

[0022] In combination with the first aspect and the above implementations, in some implementations of the first aspect, the vibration frequency of the first motion is greater than the vibration frequency of the second motion, including:

[0023] The vibration frequency of the first motion is greater than or equal to twice the vibration frequency of the second motion.

[0024] In combination with the first aspect and the above implementations, in some implementations of the first aspect, the electric toothbrush further includes a position detection unit, and the position detection unit is connected to the circuit board; wherein,

[0025] The position detection unit is used to detect the cleaning position of the brush head in the oral cavity and send the cleaning position to the circuit board.

[0026] In combination with the first aspect and the above implementations, in some implementations of the first aspect, if the cleaning position is the tooth side surface, the circuit board is further used to perform at least one of the following:

[0027] Adjust the swing amplitude of the above-mentioned first movement to be greater than the movement amplitude of the above-mentioned second movement; adjust the duty cycle of the above-mentioned first drive signal to be greater than the duty cycle of the above-mentioned second drive signal; adjust the vibration frequency of the above-mentioned first movement to be greater than the vibration frequency of the above-mentioned second movement; adjust the driving frequency of the above-mentioned first drive signal to be greater than the driving frequency of the above-mentioned second drive signal.

[0028] In combination with the first aspect and the above implementations, in some implementations of the first aspect, if the cleaning position is the occlusal surface, the circuit board is further used to perform at least one of the following:

[0029] Adjust the swing amplitude of the above-mentioned first movement to be smaller than the movement amplitude of the above-mentioned second movement; adjust the duty cycle of the above-mentioned first drive signal to be smaller than the duty cycle of the above-mentioned second drive signal; adjust the vibration frequency of the above-mentioned first movement to be smaller than the vibration frequency of the above-mentioned second movement; adjust the driving frequency of the above-mentioned first drive signal to be smaller than the driving frequency of the above-mentioned second drive signal.

[0030] In combination with the first aspect and the above implementations, in some implementations of the first aspect, the circuit board is further used to perform at least one of the following:

[0031] Adjust the duty cycle of the first drive signal corresponding to the tooth side surface to be greater than the duty cycle of the first drive signal corresponding to the occlusal surface; adjust the driving frequency of the second drive signal corresponding to the tooth side surface to be less than the driving frequency of the second drive signal corresponding to the occlusal surface.

[0032] The beneficial effects brought about by the technical solutions provided by some embodiments of the utility model include at least:

[0033] In one or more embodiments of the present invention, an electric toothbrush is provided, which includes a brush handle, a circuit board, a bidirectional motor and a brush head, wherein the circuit board is connected to the bidirectional motor, and both the circuit board and the bidirectional motor are arranged in the brush handle, and the bidirectional motor is connected to the brush head; wherein the circuit board is used to output a first drive signal and a second drive signal; and the bidirectional motor is used to drive the brush head to produce a first movement based on the first drive signal; and the bidirectional motor is used to drive the brush head to produce a first movement relative to the brush handle based on the first drive signal; and the bidirectional motor is used to drive the brush head to produce a second movement relative to the brush handle based on the second drive signal; wherein the first movement and the second movement have different movement directions; and the circuit board simultaneously outputs the first drive signal and the second drive signal to cause the brush head to perform a composite movement of the first movement and the second movement. Since the circuit board outputs the first drive signal and the second drive signal at the same time, the bidirectional motor can drive the brush head to produce the first movement based on the first drive signal, and can also drive the brush head to produce the second movement based on the second drive signal. That is, the bidirectional motor drives the brush head to move in two different directions (namely the first movement and the second movement), thereby realizing the combined movement of the brush head in two different directions. When the brush head is used for oral cleaning, a peeling force can be applied to the soft plaque or dental plaque on the surface of the teeth in multiple directions, making the soft plaque or dental plaque on the surface of the teeth easier to clean, thereby improving the cleaning ability of the electric toothbrush for teeth, and avoiding the problem of poor oral cleaning effect caused by a single movement of the brush head for cleaning the oral cavity; therefore, when the brush head performs two combined movements in different directions for cleaning the oral cavity, the cleaning ability of the electric toothbrush for teeth can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of an electric toothbrush provided by an embodiment of the utility model;

[0035] Figure 2 It is a schematic diagram of the motion trajectory of the sonic wave type and rotary electric toothbrush provided by the embodiment of the utility model on the teeth;

[0036] Figure 3 It is a structural schematic diagram of another electric toothbrush provided by an embodiment of the utility model;

[0037] Figure 4 It is a schematic diagram of the corresponding movement directions of the first movement and the second movement provided in an embodiment of the utility model;

[0038] Figure 5 It is a system schematic diagram of an electric toothbrush provided by an embodiment of the utility model;

[0039] Figure 6 It is a schematic diagram of a projection curve of an electric toothbrush provided by an embodiment of the utility model when it moves on teeth;

[0040] Figure 7 It is a schematic diagram of a bidirectional motor drive mechanism and an output shaft provided in an embodiment of the utility model;

[0041] Figure 8 is a system schematic diagram of another electric toothbrush provided by an embodiment of the utility model;

[0042] Fig. 9 This is a system schematic diagram of another electric toothbrush provided by an embodiment of the utility model;

[0043] Figure numerals: 100 - electric toothbrush; 110 - control button; 120 - brush head; 111 - circuit board; 112 - bidirectional motor; 113 - first drive mechanism; 114 - second drive mechanism; 115 - output shaft. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings to clearly and thoroughly describe the technical solution in the utility model. In the description of the embodiment of the utility model, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiment of the utility model, "multiple" means two or more than two.

[0045] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0046] Figure 1 It is a structural schematic diagram of an electric toothbrush provided by an embodiment of the utility model.

[0047] For example, Figure 1 As shown, Figure 1 The electric toothbrush 100 includes at least a control button 110 and a brush head 120. The electric toothbrush 100 is a device that can perform oral cleaning.

[0048] The control button 110 can be used to receive an oral cleaning instruction triggered by a user, and transmit the oral cleaning instruction to a circuit board in the electric toothbrush, so that the circuit board controls the swing and / or movement of the brush head 120 through the oral cleaning instruction.

[0049] The brush head 120 can swing and / or move according to the control of the control unit 120, so as to decompose the toothpaste placed on the brush head 120, so that the toothpaste is decomposed into fine foam to clean the teeth. Optionally, the brush head 120 can include but is not limited to the brush head and bristles of an electric toothbrush.

[0050] refer to Figure 1 The circuit board corresponding to the control button 110 can be set in the accommodating cavity of the handle shell of the electric toothbrush 100. The circuit board can be a microcontroller unit (MCU), also known as a single-chip microcomputer or a single-chip microcomputer. The frequency and specifications of the central processing unit (CPU) are appropriately reduced, and the peripheral interfaces such as memory, counter, USB, A / D conversion, UART, PLC and DMA, and even LCD drive circuit are integrated on a single chip to form a chip-level computer, which can perform different combination controls for different application scenarios.

[0051] In the related art, electric toothbrushes are mainly divided into rotary and sonic types. Rotary toothbrushes mainly scrape teeth by rotating the brush head to clean them, while sonic toothbrushes mainly clean teeth by high-frequency vibration of the brush head. Figure 2 When the sonic electric toothbrush cleans the teeth, the corresponding motion trajectory on the teeth is projected as a straight line, such as Figure 2 As shown in (a) in the figure, the corresponding projection of the motion trajectory of the rotating electric toothbrush on the teeth when cleaning the teeth is circular. Figure 2 As shown in (b) in .

[0052] For example, since the sonic electric toothbrush cleans teeth horizontally, that is, the electric toothbrush has a relatively simple movement mode, the electric toothbrush has limited cleaning ability for teeth, especially the cleaning effect on the gum line, dead corners, pits and fissures is poor, and cannot meet the user's cleaning needs for teeth. In addition, the rotary electric toothbrush is a rotary motion generated by mechanical transmission, the movement frequency is low, and the cleaning force on the soft plaque or dental plaque on the teeth is small, resulting in a poor cleaning effect of the rotary electric toothbrush on the soft plaque or dental plaque on the teeth.

[0053] In order to solve the problem that electric toothbrushes have a poor cleaning effect on teeth, the utility model provides an electric toothbrush.

[0054] Combine the following Figures 3 to 9 The electric toothbrush provided in the embodiment of the utility model is described in detail.

[0055] Figure 3 It is a structural schematic diagram of another electric toothbrush provided by an embodiment of the utility model.

[0056] For example, Figure 3 As shown, Figure 3 The electric toothbrush at least comprises: a brush handle 130, a circuit board 111, a bidirectional motor 112 and a brush head 120. The circuit board 111 is connected to the bidirectional motor 112, the bidirectional motor 112 is connected to the brush head 120, and the circuit board 111 and the bidirectional motor 112 are both arranged in the brush handle 130.

[0057] The circuit board 111 can be used to output two drive signals, for example, a first drive signal and a second drive signal, according to the oral cleaning instruction received from the user. Figure 1 The control button 110 shown can be connected to the circuit board 111 to output oral cleaning instructions to the circuit board 111.

[0058] Optionally, the oral cleaning instruction can be triggered by the user through the control button of the electric toothbrush, and the triggering methods include but are not limited to touch, click and voice, etc. In addition, the oral cleaning instruction can carry the oral cleaning parameters required by the electric toothbrush for oral cleaning, including but not limited to the oral cleaning mode and oral cleaning intensity, etc.

[0059] For example, when the user needs to clean the mouth, the user can click the control button of the electric toothbrush to trigger the oral cleaning instruction; alternatively, the user can send an oral cleaning instruction to the electric toothbrush through a smart terminal connected to the electric toothbrush, so that the circuit board 111 can receive the oral cleaning instruction for oral cleaning.

[0060] The bidirectional motor 112 can be used to drive a first motion relative to the brush head 120 according to a first driving signal output by the circuit board 111; and the bidirectional motor 112 can also be used to drive a second motion relative to the brush head 120 according to a second driving signal output by the circuit board 111. And, the first motion and the second motion have different motion directions.

[0061] Optionally, the first motion may represent a reciprocating swing of the brush head 120 with the length extension direction of the brush head 120 as an axis (eg, Figure 4 The reciprocating swing shown in (a) in the figure), that is, the arc swing, can enable the brush head 120 to form a longitudinal scraping force on the teeth during the cleaning process, thereby peeling off the soft plaque or dental plaque on the surface of the teeth.

[0062] Alternatively, the second motion may represent a reciprocating movement along the length extension direction of the brush head 120 (eg Figure 4 The reciprocating motion shown in (a), that is, linear vibration, can enable the brush head 120 to form a lateral scraping force on the teeth during the cleaning process, thereby peeling off soft plaque or dental plaque on the surface of the teeth.

[0063] Furthermore, the composite motion of the first motion and the second motion is a composite motion including circular arc swing and linear vibration (i.e., circular arc motion), such as Figure 4 As shown in (a); the circular motion replaces the brushing method of rotating and moving when the user manually uses an ordinary toothbrush (non-electric toothbrush), that is, the synthetic motion of the brush head 120 realizes the same brushing method as the circular motion brushing method, so that when the brush head cleans the teeth through the synthetic motion, the teeth can be cleaned together by circular swing and linear vibration, that is, the teeth are cleaned horizontally and vertically at the same time, so that the soft plaque or dental plaque on the surface of the teeth is easier to be peeled off under multi-directional scraping. In addition, the mechanical motion of the brush head 120 can help the user to better clean the oral cavity, which can avoid the problem of the oral cleaning effect being affected by the individual operation differences of the users, so that any user can use the electric toothbrush to realize the circular motion brushing method to clean the teeth more effectively.

[0064] Optionally, the first movement may also represent the reciprocating movement of the brush head 120 with the length extension direction of the brush head 120 as the axis (eg Figure 4 The linear movement shown in (b) in the figure).

[0065] Exemplarily, a correspondence between oral cleaning parameters and the first drive signal and the second drive signal can be pre-stored in the electric toothbrush, so that after receiving the oral cleaning instruction, the circuit board can respond to the oral cleaning instruction and query the corresponding first drive signal and the second drive signal from the correspondence according to the oral cleaning parameters carried by the oral cleaning instruction, so as to drive the brush head to produce reciprocating swings with its own length extension direction as the axis based on the first drive signal; and drive the brush head to produce reciprocating movements along its own length extension direction based on the second drive signal.

[0066] Alternatively, in response to an oral cleaning instruction, and based on the oral cleaning parameters carried by the oral cleaning instruction, the corresponding first drive signal and the second drive signal are queried from the corresponding relationship; and based on the first drive signal, the brush head is driven to produce reciprocating movement with its own length extension direction as the axis, and based on the second drive signal, the brush head is driven to produce reciprocating movement along its own length extension direction.

[0067] Figure 5 It is a system schematic diagram of an electric toothbrush provided in an embodiment of the utility model.

[0068] For example, Figure 5 As shown in (a), Figure 5 (a) includes a circuit board, a bidirectional motor and a brush head. The circuit board can be used to output a first drive signal to the bidirectional motor according to an oral cleaning instruction triggered by a user, and the bidirectional motor can be used to drive the brush head to generate a first movement according to the received first drive signal.

[0069] For example, when the circuit board receives the oral cleaning instruction triggered by the user, it can output a first driving signal to the bidirectional motor to drive the bidirectional motor to drive the brush head to generate a first motion (such as Figure 5 As shown in (a) in the figure, when the bidirectional motor drives the brush head to generate the first movement, the brush head can apply a longitudinal peeling force to the soft plaque or dental plaque on the tooth surface, thereby longitudinally cleaning the soft plaque or dental plaque on the tooth surface.

[0070] For example, Figure 5 The circuit board shown in (b) can be used to output a second drive signal to the bidirectional motor according to an oral cleaning instruction triggered by a user; the bidirectional motor can be used to drive the brush head to produce a second movement different from the first movement direction according to the received second drive signal.

[0071] For example, when the circuit board receives the oral cleaning instruction triggered by the user, it can also output a second driving signal to the bidirectional motor to drive the bidirectional motor to drive the brush head to generate a second motion (such as Figure 5 As shown in (b) in the figure, when the bidirectional motor drives the brush head to generate the second motion, the brush head can exert a lateral peeling force on the soft plaque or dental plaque on the tooth surface, thereby cleaning the soft plaque or dental plaque on the tooth surface laterally.

[0072] It should be noted that the embodiments of the present invention do not limit the multi-directional motor to only a bidirectional motor, but can also be a three-directional motor, etc. The type of the multi-directional motor needs to be determined according to the requirements of the brush head movement direction, and the embodiments of the present invention do not limit this.

[0073] Exemplarily, when the circuit board outputs the first drive signal and the second drive signal at the same time, the bidirectional motor can drive the brush head to generate a first motion based on the first drive signal, and also drive the brush head to generate a second motion based on the second drive signal, so that the brush head can perform a composite motion of the first motion and the second motion (such as Figure 4 As shown in (a) of Figure 4 As shown in (b) in the figure, the oral cavity is cleaned by circular motion.

[0074] like Figure 5As shown in (c), when the circuit board receives an oral cleaning instruction triggered by the user, it can simultaneously output a first drive signal and a second drive signal to the bidirectional motor, so that the bidirectional motor simultaneously drives the brush head to generate a first motion and a second motion with different motion directions, so that the brush head performs a synthetic motion of high-frequency vibration, thereby making it easier to clean the soft plaque and dental plaque on the teeth when scraping the teeth in all directions under high-frequency vibration, thereby improving the cleaning power of the brush head; and because the brush head cleans the teeth through a circular motion, it can smoothly scrape the surface of the teeth or the position where the teeth and gums meet, thereby avoiding damage to the gums due to straight scraping, and can also massage the gums to avoid gum atrophy.

[0075] Exemplarily, the time when the circuit board outputs the first drive signal and the time when it outputs the second drive signal, and / or the duty cycle of the first drive signal and the duty cycle of the second drive signal, and / or the vibration frequency of the first movement and the vibration frequency of the second movement, and / or the driving frequency of the first movement and the driving frequency of the second movement, and / or the swing amplitude of the first movement and the movement amplitude of the second movement may all affect the corresponding projection of the brush head on the teeth when it performs a circular motion on the teeth, so that the curve shape of the corresponding projection of the brush head on the teeth when it performs a circular motion on the teeth may include but is not limited to Figure 6 The shapes shown in, for example, Figure 6 The circle shown in (a) in Figure 6 The ellipse shown in (b) Figure 6 The spring-shaped curve shown in (c) is Figure 6 The sinusoidal curve shown in (d) is Figure 6 The lying "8" shaped curve shown in (e) and Figure 6 The ellipse shown in (f) in FIG.

[0076] It should be noted that Figure 6 The projection curves of the electric toothbrush moving on the teeth shown in the figure are all projections of a single movement of the brush head.

[0077] Optionally, when the user uses the electric toothbrush to clean the oral cavity, the movement of the electric toothbrush will also affect the projection curve of the electric toothbrush when it moves on the teeth. For example, when the user moves the electric toothbrush laterally while brushing the teeth, the projection curve of the trajectory of the synthetic movement of the brush head on the teeth may change, including but not limited to the following: Figure 6 The circle shown in (a) becomes Figure 6 The spring-shaped curve shown in (c) of FIG. 1 ; or Figure 6 The ellipse shown in (b) becomes Figure 6 The spring-shaped curve shown in (c) of FIG. 1 ; or Figure 6The ellipse shown in (f) becomes Figure 6 The spring shape curve shown in (c).

[0078] In such Figure 3 In the electric toothbrush shown, since the circuit board outputs the first drive signal and the second drive signal at the same time, the bidirectional motor can drive the brush head to produce the first movement based on the first drive signal, and can also drive the brush head to produce the second movement based on the second drive signal, that is, the bidirectional motor drives the brush head to move in two different directions (namely the first movement and the second movement), thereby realizing the combined movement of the brush head in two different directions. When the brush head is used for oral cleaning, a peeling force can be applied to the soft plaque or dental plaque on the surface of the teeth in multiple directions, making the soft plaque or dental plaque on the surface of the teeth easier to clean, thereby improving the cleaning ability of the electric toothbrush for teeth, and avoiding the problem of poor oral cleaning effect caused by a single movement of the brush head for cleaning the oral cavity; therefore, when the brush head performs two combined movements in different directions for cleaning the oral cavity, the cleaning ability of the electric toothbrush for teeth can be improved.

[0079] Optionally, the electric toothbrush may also be equipped with but not limited to one or more indicator lights, buttons, display screens, speakers, motors, etc.

[0080] Exemplarily, the bidirectional motor 112 may include multiple drive mechanisms and output shafts, for example, Figure 7 The first drive mechanism 113 and the second drive mechanism 114, and the output shaft 115 are shown. The first drive mechanism 113 and the second drive mechanism 114 share the output shaft 115 (which can be called the "third output shaft"), and the output shaft 115 is an integrated structure. The output shaft 115 is connected to the first drive mechanism 113 and the second drive mechanism 114 respectively, and the output shaft 115 is connected to the brush head 120, so that the first drive mechanism 113 and the second drive mechanism 114 are both connected to the brush head 120.

[0081] The first driving mechanism 113 can be used to drive the brush head 120 to generate a first motion based on a first driving signal.

[0082] The second driving mechanism 114 can be used to drive the brush head 120 to generate a second motion based on a second driving signal.

[0083] Exemplarily, when the circuit board 111 outputs the first driving signal, the first driving mechanism 113 can drive the brush head 120 to generate the first motion based on the first driving signal.

[0084] Exemplarily, when the circuit board 111 outputs the second driving signal, the second driving mechanism 114 can drive the brush head 120 to generate a second movement different from the first movement direction based on the second driving signal, so that the brush head can perform cleaning movements in different directions.

[0085] It should be noted that if Figure 7 The shapes of the first driving mechanism 113 and the second driving mechanism 114 shown are only exemplary and may also be rectangular or irregular in shape, which is not limited in the embodiment of the present invention.

[0086] It should also be noted that the embodiment of the utility model does not limit the number of driving mechanisms in the bidirectional motor. The number of driving mechanisms can be determined based on the requirements for the movement direction of the brush head. For example, the number of driving mechanisms in the bidirectional motor can include but is not limited to 1, 3 or 4.

[0087] The output shaft 115 can be used to drive the brush head 120 to perform a first movement under a first driving signal.

[0088] The output shaft 115 can also be used to drive the brush head 120 to perform a second movement under a second driving signal.

[0089] Exemplarily, the circuit board 111 can output a first driving signal to the first driving mechanism 113. The first driving mechanism 113 drives the output shaft 115 to perform a first movement based on the first driving signal to drive the brush head 120 to perform a first movement, so that the brush head forms a longitudinal scraping force during the cleaning process of the teeth, thereby peeling off soft plaque or dental plaque on the surface of the teeth.

[0090] In addition, the circuit board 111 can also output a second driving signal to the second driving mechanism 114. The second driving mechanism 114 drives the output shaft 115 to perform a second movement based on the second driving signal to drive the brush head 120 to perform a second movement, so that the brush head forms a lateral scraping force during the cleaning process of the teeth, which is used to peel off soft plaque or dental plaque on the surface of the teeth.

[0091] Exemplarily, when the circuit board 111 simultaneously outputs a first drive signal to the first drive mechanism 113 and a second drive signal to the second drive mechanism 114, the first drive mechanism 113 drives the output shaft 115 to perform a composite motion of the first motion and the second motion based on the first drive signal, and the second drive mechanism 114 drives the output shaft 115 to perform a composite motion of the first motion and the second motion based on the second drive signal, thereby driving the brush head 120 to perform a composite motion, so as to apply a peeling force to the soft plaque or dental plaque on the tooth surface in multiple directions, so that the soft plaque or dental plaque on the tooth surface is easier to clean, thereby improving the electric toothbrush's cleaning ability for teeth.

[0092] Optionally, the output shaft 115 may also be a split structure, that is, the output shaft 115 may be divided into multiple output shafts, for example, a first output shaft and a second output shaft, and the first output shaft is different from the second output shaft. The first drive mechanism 113 and the second drive mechanism 114 have their own corresponding output shafts, for example, the first drive mechanism 113 corresponds to the first output shaft, and the second drive mechanism 114 corresponds to the second output shaft.

[0093] Furthermore, the first output shaft is connected to the first driving mechanism 113 , the second output shaft is connected to the second driving mechanism 114 , and the first output shaft and the second output shaft can be connected via a connecting member; the first output shaft and the second output shaft are both connected to the brush head 120 .

[0094] The first output shaft can be used to drive the brush head 120 to perform a first movement under a first driving signal.

[0095] The second output shaft can be used to drive the brush head 120 to perform a second movement under a second driving signal.

[0096] Exemplarily, the circuit board 111 can output a first driving signal to the first driving mechanism 113. The first driving mechanism 113 drives the first output shaft to perform a first movement based on the first driving signal, so as to drive the brush head 120 to perform a first movement, so that the brush head forms a longitudinal scraping force during the cleaning process of the teeth, thereby peeling off soft plaque or dental plaque on the surface of the teeth.

[0097] In addition, the circuit board 111 can also output a second driving signal to the second driving mechanism 114. The second driving mechanism 114 drives the second output shaft to perform a second movement based on the second driving signal to drive the brush head 120 to perform a second movement, so that the brush head forms a lateral scraping force during the cleaning process of the teeth, which is used to peel off soft plaque or dental plaque on the surface of the teeth.

[0098] Exemplarily, when the circuit board 111 simultaneously outputs a first drive signal to the first drive mechanism 113 and a second drive signal to the second drive mechanism 114, the first drive mechanism 113 drives the first output shaft to perform a first movement based on the first drive signal, while the second drive mechanism 114 drives the second output shaft to perform a second movement based on the second drive signal, thereby driving the brush head 120 to perform a combined movement of the first movement and the second movement, so as to apply a peeling force to the soft plaque or dental plaque on the surface of the teeth in multiple directions, so that the soft plaque or dental plaque on the surface of the teeth is easier to clean, thereby improving the cleaning ability of the electric toothbrush on the teeth.

[0099] Optionally, the number of the multiple output shafts in the bidirectional motor 112 is the same as the number of the driving mechanisms in the bidirectional motor 112 .

[0100] In a possible implementation, the first driving mechanism 113 can be used to drive the brush head 120 to swing back and forth with the length extension direction of the brush head 120 as the axis based on the first driving signal; or the first driving mechanism 113 can be used to drive the brush head 120 to move back and forth with the length extension direction of the brush head 120 as the axis based on the first driving signal. And the second driving mechanism 114 can be used to drive the brush head 120 to move back and forth along the length extension direction of the brush head 120 based on the second driving signal.

[0101] Exemplarily, the circuit board 111 can output a driving signal corresponding to the first driving mechanism 113 (which may be referred to as a "first driving signal") to the first driving mechanism 113, and drive the brush head 120 to generate a first motion through the bidirectional motor 112, that is, drive the brush head 120 to swing back and forth with the length extension direction of the brush head 120 as the axis, so that the brush head forms a longitudinal scraping force during the cleaning process of the teeth, thereby peeling off soft plaque or dental plaque on the surface of the teeth.

[0102] In addition, the circuit board 111 can also output a driving signal corresponding to the second driving mechanism 114 (which can be called a "second driving signal") to the second driving mechanism 114, and drive the brush head 120 to generate a second motion through the bidirectional motor 112, that is, drive the brush head 120 to reciprocate along the length extension direction of the brush head 120, so that the brush head forms a lateral scraping force during the cleaning process of the teeth, which is used to peel off soft plaque or dental plaque on the surface of the teeth.

[0103] Alternatively, the circuit board 111 may also output a driving signal corresponding to the first driving mechanism 113 (which may be referred to as a "first driving signal") to the first driving mechanism 113, and drive the brush head 120 to reciprocate with the length extension direction of the brush head 120 as the axis through the bidirectional motor.

[0104] Optionally, the first driving mechanism 113 and the second driving mechanism 114 may work simultaneously or individually.

[0105] Exemplarily, the circuit board 111 can simultaneously output a first drive signal to the first drive mechanism 113, and a second drive signal to the second drive mechanism 114, so that the first drive mechanism 113 and the second drive mechanism 114 work simultaneously, thereby driving the brush head 120 to generate a composite motion of the first motion and the second motion, and the corresponding projection of the composite motion on the teeth is circular, that is, the composite motion can be an arc motion. Because the brush head is an arc motion generated by signal transmission, the movement frequency of the brush head is much greater than the movement frequency of the rotational motion generated by the mechanical transmission of the brush head, thereby improving the cleaning force of the brush head, making it easier to clean the soft plaque and dental plaque on the teeth when the brush head is scraped in multiple directions under high-frequency vibration; and because the brush head can scrape the tooth surface smoothly or the position where the tooth and the gum meet smoothly when cleaning the teeth through the arc motion, thereby avoiding damage to the gums due to straight scraping, and can also massage the gums to avoid gum atrophy.

[0106] Exemplarily, the circuit board 111 may also output a single motion and a combined motion alternately; for example, the first drive signal is outputted to the first drive mechanism 113 alone, and after the output of the first drive signal is completed, the first drive signal is outputted to the first drive mechanism 113 and the second drive signal is outputted to the second drive mechanism 114 simultaneously. Alternatively, the second drive signal is outputted to the second drive mechanism 114 alone, and after the output of the second drive signal is completed, the first drive signal is outputted to the first drive mechanism 113 and the second drive signal is outputted to the second drive mechanism 114 simultaneously.

[0107] Optionally, the circuit board 111 can also output the first movement and the second movement alternately; for example, the first drive signal is output to the first drive mechanism 113 alone, and after the output of the first drive signal is completed, the second drive signal is output to the second drive mechanism 114 alone; after the output of the second drive signal is completed, the first drive signal is output to the first drive mechanism 113 alone again.

[0108] Optionally, the circuit board 111 can also independently output a first drive signal to the first drive mechanism 113, so that the brush head 120 can be driven to generate only a first movement; and after the output of the first drive signal is completed, the circuit board 111 independently outputs a second drive signal to the second drive mechanism 114, so that the brush head 120 can be driven to generate only a second movement.

[0109] It should be noted that the single motion can be the first motion or the second motion. Also, the timing of the circuit board 111 outputting the first drive signal and the second drive signal separately is not fixed, that is, the circuit board 111 can output the first drive signal first and then the second drive signal, or the circuit board 111 can output the second drive signal first and then the first drive signal; the embodiment of the utility model does not limit this.

[0110] In a possible implementation, the first driving mechanism and the second driving mechanism in the handle of the electric toothbrush may be arranged along the extension direction of the handle.

[0111] For example, Figure 7 As shown, the brush handle 130 may include a circuit board 111 and a bidirectional motor 112. Since the first drive mechanism 113 and the second drive mechanism 114 are disposed inside the bidirectional motor 112, the first drive mechanism 113 and the second drive mechanism 114 are also included in the brush handle 130. Figure 7 As shown, they are arranged along the extension direction of the brush handle 130, so that the first driving mechanism 113 and the second driving mechanism 114 do not affect each other when driving the brush head 120 to move, ensuring that the brush head can perform a combined movement.

[0112] For example, since the vibration frequency of the brush head in different directions may also affect the cleaning effect of the teeth, the vibration frequency of the first movement and the vibration frequency of the second movement can be set.

[0113] Optionally, the vibration frequency of the first movement and the vibration frequency of the second movement can be set to the same vibration frequency. When the vibration frequency of the first movement is equal to the vibration frequency of the second movement, the projection of the trajectory of the combined movement of the brush head on the teeth can be made more regular and closer to a circle, such as Figure 6 The circle shown in (a) in the figure can improve the cleaning ability of the brush head on the soft plaque or dental plaque on the surface of the teeth and perform a deeper cleaning of the teeth.

[0114] Optionally, the vibration frequency of the first movement and the vibration frequency of the second movement can be set to different vibration frequencies; for example, the vibration frequency of the first movement is greater than the vibration frequency of the second movement; when the vibration frequency of the first movement is greater than the vibration frequency of the second movement, the projection of the trajectory of the combined movement of the brush head on the teeth can be made to appear as follows: Figure 6 The spring-shaped curve shown in (c) in the figure, or Figure 6 The sinusoidal curve shown in (d) in the figure indicates that the movement state of the brush head is shaking and moving, which is equivalent to the brushing technique of moving and shaking up and down when the user brushes his teeth manually. Moreover, since the vibration frequency of the first movement is greater than the vibration frequency of the second movement, the longitudinal stripping force applied by the brush head to the soft plaque or dental plaque on the tooth surface can be greater than the lateral stripping force, making the soft plaque and dental plaque on the tooth surface easier to clean.

[0115] Furthermore, since the driving frequency of the driving signal output by the circuit board will affect the vibration frequency of the brush head, the vibration frequency of the first movement and the vibration frequency of the second movement can be set by setting the driving frequency of the first driving signal and the driving frequency of the second driving signal. For example, when the driving frequency of the first driving signal is set to be greater than the driving frequency of the second driving signal, the vibration frequency of the first movement can be made greater than the vibration frequency of the second movement. Alternatively, when the driving frequency of the first driving signal is set to be less than or equal to the driving frequency of the second driving signal, the vibration frequency of the first movement can be made less than or equal to the vibration frequency of the second movement.

[0116] Furthermore, the vibration frequency of the first movement is greater than the vibration frequency of the second movement, which may include: the vibration frequency of the first movement is greater than or equal to twice the vibration frequency of the second movement.

[0117] For example, the vibration frequency of the first motion can be set to be greater than or equal to twice the vibration frequency of the second motion. When the vibration frequency of the first motion is greater than or equal to twice the vibration frequency of the second motion, the longitudinal stripping force applied by the brush head to the soft plaque and dental plaque on the tooth surface can be much greater than the lateral stripping force, so that the soft plaque and dental plaque on the tooth surface can be cleaned more deeply.

[0118] Optionally, the driving frequency of the first driving signal is greater than the driving frequency of the second driving signal, which may include: the driving frequency of the first driving signal is greater than or equal to twice the driving frequency of the second driving signal.

[0119] For example, since the driving frequency of the driving signal output by the circuit board will affect the vibration frequency of the brush head movement, when the driving frequency of the first driving signal is set to be greater than or equal to twice the driving frequency of the second driving signal, the vibration frequency of the first movement can be greater than or equal to twice the vibration frequency of the second movement, so that the longitudinal stripping force applied by the brush head to the soft plaque and dental plaque on the tooth surface is much greater than the lateral stripping force, thereby performing a deeper cleaning of the soft plaque and dental plaque on the tooth surface.

[0120] For example, in addition to the vibration frequency of the brush head in different directions affecting the cleaning effect of the teeth, the swing amplitude of the brush head in different directions may also affect the cleaning effect of the teeth. Therefore, the swing amplitude of the first movement and the movement amplitude of the second movement can be set.

[0121] Optionally, the swing amplitude of the first motion is smaller than or equal to the movement amplitude of the second motion. And / or, the duty cycle of the first driving signal is smaller than or equal to the duty cycle of the second driving signal.

[0122] Exemplarily, when the vibration frequency of the first movement is equal to the vibration frequency of the second movement, the swing amplitude of the first movement and the movement amplitude of the second movement can be set to the same movement amplitude (that is, the vibration frequency of the first movement and the second movement are equal and the movement amplitude is also the same), so that when the vibration frequency of the first movement is equal to the vibration frequency of the second movement, and the swing amplitude of the first movement is equal to the movement amplitude of the second movement, the projection of the trajectory of the synthetic movement of the brush head on the teeth can be made to appear as follows: Figure 6 The circle shown in (a) improves the cleaning effect of the brush head on soft plaque and dental plaque on the tooth surface and performs a deeper cleaning of the teeth.

[0123] In addition, when the vibration frequency of the first movement is equal to the vibration frequency of the second movement, and the swing amplitude of the first movement is equal to the movement amplitude of the second movement, if the user moves the electric toothbrush laterally while brushing his teeth, the projection of the trajectory of the combined movement of the brush head on the teeth may appear as follows: Figure 6 The spring-shaped curve shown in (c) improves the cleaning effect of the brush head on soft plaque and dental plaque on the tooth surface.

[0124] Exemplarily, when the vibration frequency of the first movement is equal to the vibration frequency of the second movement, the swing amplitude of the first movement can also be set to be smaller than the movement amplitude of the second movement (that is, the vibration frequencies of the first movement and the second movement are equal but the movement amplitudes are different), that is, the reciprocating swing of the brush head with its own length extension direction as the axis is smaller than the reciprocating movement of the brush head along its own length extension direction, or the reciprocating movement of the brush head with its own length extension direction as the axis is smaller than the reciprocating movement of the brush head along its own length extension direction. In other words, when the vibration frequency of the first movement is equal to the vibration frequency of the second movement, the bidirectional motor can drive the longitudinal swing amplitude of the brush head to be smaller than the lateral movement amplitude, so that the projection of the trajectory of the combined movement of the brush head on the teeth appears as follows: Figure 6 The ellipse shown in (b) can prevent damage to the gums due to the large longitudinal swing of the brush head during the cleaning process, thereby protecting the gums.

[0125] Exemplarily, when the vibration frequency of the first movement is equal to the vibration frequency of the second movement, the swing amplitude of the first movement can be set to be greater than the movement amplitude of the second movement, that is, the reciprocating swing of the brush head with its own length extension direction as the axis is greater than the reciprocating movement of the brush head along its own length extension direction, or the reciprocating movement of the brush head with its own length extension direction as the axis is greater than the reciprocating movement of the brush head along its own length extension direction. In other words, when the vibration frequency of the first movement is equal to the vibration frequency of the second movement, the bidirectional motor can drive the longitudinal swing amplitude of the brush head on the teeth to be greater than the lateral movement amplitude, so that the projection of the trajectory of the combined movement of the brush head on the teeth appears as follows: Figure 6The ellipse shown in (f) increases the longitudinal cleaning area of ​​the teeth by the brush head, thereby reducing the missed area when the brush head cleans the teeth, and cleaning the teeth more comprehensively.

[0126] Furthermore, since the duty cycle of the drive signal output by the circuit board will affect the movement amplitude of the brush head, the swing amplitude of the first movement and the moving amplitude of the second movement can be set by setting the duty cycle of the first drive signal and the second drive signal. For example, when the duty cycle of the first drive signal is set to be less than or equal to the duty cycle of the second drive signal, the swing amplitude of the first movement can be made less than or equal to the moving amplitude of the second movement. Alternatively, when the duty cycle of the first drive signal is set to be greater than the duty cycle of the second drive signal, the swing amplitude of the first movement can be made greater than the moving amplitude of the second movement.

[0127] Optionally, when the vibration frequency of the first movement is not equal to the vibration frequency of the second movement, the swing amplitude of the first movement and the movement amplitude of the second movement can be set to be equal movement amplitudes (that is, the vibration frequencies of the first movement and the second movement are not equal but the movement amplitudes are the same), so that when the vibration frequency of the first movement is not equal to the vibration frequency of the second movement and the swing amplitude of the first movement is equal to the movement amplitude of the second movement, the longitudinal peeling force and the transverse peeling force applied to the teeth by the brush head when cleaning the teeth are different, and the projection of the trajectory of the combined movement of the brush head on the teeth appears as follows Figure 6 The circle shown in (a) further improves the cleaning ability of the brush head on soft plaque and dental plaque on the tooth surface, and performs a deeper cleaning of the teeth.

[0128] Exemplarily, when the vibration frequency of the first movement is not equal to the vibration frequency of the second movement, the swing amplitude of the first movement and the moving amplitude of the second movement can be set to be unequal (that is, the vibration frequencies of the first movement and the second movement are not equal and the movement amplitudes are also different), so that when the vibration frequency of the first movement is not equal to the vibration frequency of the second movement, and the swing amplitude of the first movement is not equal to the moving amplitude of the second movement, the longitudinal peeling force and the transverse peeling force applied by the brush head to the teeth when cleaning the teeth are different, and an elliptical motion trajectory is formed, thereby protecting the gums when cleaning the soft plaque or dental plaque on the surface of the teeth.

[0129] For example, when the vibration frequency of the first motion is greater than the vibration frequency of the second motion, the swing amplitude of the first motion can be set equal to the movement amplitude of the second motion. That is, when the brush head cleans the teeth, the longitudinal peeling force applied to the teeth is greater than the transverse peeling force, and the projection of the trajectory of the combined motion of the brush head on the teeth appears as follows: Figure 6 The circle shown in (a) in the figure can improve the cleaning ability of the brush head on the soft plaque and dental plaque on the tooth surface and perform a deeper cleaning of the teeth.

[0130] For another example, when the vibration frequency of the first motion is greater than the vibration frequency of the second motion, the swing amplitude of the first motion can be set to be smaller than the movement amplitude of the second motion. That is, when the brush head cleans the teeth, the longitudinal peeling force applied to the teeth is greater than the transverse peeling force, so that the projection of the trajectory of the combined motion of the brush head on the teeth appears as follows: Figure 6 The ellipse shown in (b) in the figure can improve the cleaning ability of the brush head on soft plaque and dental plaque on the tooth surface, while avoiding damage to the gums due to the large longitudinal swing of the brush head during the cleaning process, thereby protecting the gums.

[0131] It should be noted that in different oral cleaning modes, the vibration frequency of the first movement and the vibration frequency of the second movement, as well as the size between the swing amplitude of the first movement and the movement amplitude of the second movement can be combined according to cleaning needs, thereby forming a variety of movement frequencies or movement amplitudes, affecting the movement of the brush head, and then affecting the movement trajectory of the brush head, so that an electric toothbrush with multiple driving mechanisms can combine more oral cleaning modes to better meet the user's oral cleaning needs.

[0132] In a possible implementation, there may be a preset time difference between the time when the circuit board outputs the first driving signal and the time when the circuit board outputs the second driving signal.

[0133] The preset time difference is the sum of N cycle durations and one quarter cycle duration; or, the preset time difference is the sum of N cycle durations and three quarters cycle duration; the cycle duration is the duration of a single complete output of the first drive signal or the second drive signal; N is an integer greater than or equal to 0. It should be understood that the cycle duration of the first drive signal and the cycle duration of the second drive signal may be the same.

[0134] Optionally, the first duration may be calculated using formula (1) or formula (2):

[0135] First duration = number of cycles × cycle duration + 1 / 4 × cycle duration (1) First duration = number of cycles × cycle duration + 3 / 4 × cycle duration (2)

[0136] For example, the duration of a single complete output of the first drive signal and the second drive signal is 8 seconds, and the number of cycles is 0. By calculating from formula (1), it can be obtained that: the first duration = 0×8 + 1 / 4×8 = 2 seconds; or, by calculating from formula (2), it can be obtained that: the first duration = 0×8 + 3 / 4×8 = 6 seconds. And, N is an integer greater than or equal to zero, that is, N includes but is not limited to 0, 1, 2...N.

[0137] For example, when the bidirectional motor is reset, the brush head can be driven to swing in the center in the first movement corresponding direction and move in the second movement corresponding direction at the extreme position, so that the synthetic movement corresponding trajectory of the brush head is as closed as possible, which better simulates the circular motion.

[0138] Alternatively, when the bidirectional motor is reset, the brush head can be driven to swing in the direction corresponding to the first movement at the extreme position, and move in the direction corresponding to the second movement at the center, or the synthetic movement corresponding trajectory of the brush head can be made as closed as possible. In other words, when the brush head performs synthetic movement, either the swing in the direction corresponding to the first movement or the movement in the direction corresponding to the second movement is at the center, and the other is at the extreme position.

[0139] Figure 8 It is a system schematic diagram of another electric toothbrush provided in an embodiment of the utility model.

[0140] For example, Figure 8 As shown in (a), the circuit board in the electric toothbrush can first output a first drive signal for a first duration (for example, 2 seconds), so that the brush head is centered in the direction corresponding to the first movement or in the extreme position; thereafter, the first drive signal and the second drive signal are output simultaneously, so that when the brush head performs a composite movement of the first movement and the second movement, there is always a first duration of asynchronism between the first drive signal and the second drive signal, that is, when the brush head performs a composite movement, any one of the swing in the direction corresponding to the first movement and the movement in the direction corresponding to the second movement is centered, and the other is in the extreme position, so that the projection of the trajectory of the composite movement of the brush head on the teeth is as closed a curve as possible, that is, the brush head better simulates the arc brushing method, so that the soft plaque or dental plaque on the tooth surface is applied with multi-directional stripping force under high-frequency vibration, so that the soft plaque or dental plaque on the tooth surface is easier to be cleaned, thereby improving the cleaning ability of the electric toothbrush on the teeth.

[0141] For example, Figure 8 As shown in (b), the circuit board in the electric toothbrush can also first output the second drive signal for a first duration (for example, 6 seconds) so that the brush head is centered or at an extreme position in the direction corresponding to the second movement; thereafter, the first drive signal and the second drive signal are output simultaneously, so that when the brush head performs a composite movement of the first movement and the second movement, there is always a first duration of asynchrony between the first drive signal and the second drive signal, thereby improving the electric toothbrush's cleaning ability for teeth.

[0142] It should be noted that Figure 8 As shown in (a) and Figure 8 During the driving process of the electric toothbrush shown in (b), the vibration frequency of the first motion is equal to the vibration frequency of the second motion; and Figure 8 As shown in (a) and Figure 8 The first duration shown in (b) may represent the sum of N cycle durations and a quarter cycle duration of a single complete output of the first drive signal or the second drive signal; or, the sum of N cycle durations and three quarters cycle durations, and Figure 8 As shown in (a) and Figure 8 The first duration shown in (b) can be the same or different. For example, Figure 8 The first duration shown in (a) is 2 seconds, which is different from Figure 8 The first time length shown in (b) is 6 seconds; when there is always a first time length of asynchrony between the first drive signal and the second drive signal output by the circuit board, the cleaning ability of the electric toothbrush on the teeth can be improved, and the embodiment of the utility model does not limit this.

[0143] Exemplarily, in addition to causing the brush head to perform a combined motion of the first motion and the second motion, the circuit board can also cause the brush head to perform alternating motion of a single motion and a combined motion.

[0144] Exemplarily, the output of the first driving signal and the second driving signal is suspended, and a single driving signal is output; the output of the single driving signal is suspended, and the first driving signal and the second driving signal are output again simultaneously.

[0145] Optionally, the single driving signal may include the first driving signal or the second driving signal.

[0146] Exemplarily, when the first drive signal and the second drive signal are output simultaneously, if the circuit board pauses outputting the first drive signal and the second drive signal, it may output the first drive signal or the second drive signal separately; and when the output of the first drive signal or the second drive signal is paused, the first drive signal and the second drive signal may be output simultaneously again, so that the brush head may perform alternating synthetic motion and unidirectional motion, so that when the brush head is cleaning the teeth, it can not only apply multi-directional force to remove soft plaque and dental plaque on the tooth surface, but also perform longitudinal or transverse cleaning of the teeth separately, thereby increasing the motion trajectory of the brush head and performing a more comprehensive cleaning of the tooth surface.

[0147] Fig. 9 This is a system schematic diagram of another electric toothbrush provided by an embodiment of the utility model.

[0148] For example, Fig. 9As shown in (a), after simultaneously outputting the first drive signal and the second drive signal, if the circuit board pauses outputting the first drive signal and the second drive signal, it can output the first drive signal alone; and when pausing the output of the first drive signal, it outputs the first drive signal and the second drive signal simultaneously again, so that the circuit board can alternately output "first drive signal + second drive signal → first drive signal → first drive signal + second drive signal" to enable the brush head to perform alternating motions of "synthetic motion → first motion → synthetic motion", so that when the brush head is cleaning the teeth, it can not only simultaneously and multi-directionally apply forces to remove soft plaque and dental plaque on the surface of the teeth, but also perform longitudinal cleaning of the teeth alone and deep cleaning of the gaps between the teeth, thereby further improving the cleaning effect of the teeth.

[0149] For example, Fig. 9 As shown in (b), after simultaneously outputting the first drive signal and the second drive signal, if the circuit board pauses outputting the first drive signal and the second drive signal, it can output the second drive signal alone; and when pausing the output of the second drive signal, it outputs the first drive signal and the second drive signal simultaneously again, so that the circuit board can alternately output "first drive signal + second drive signal → second drive signal → first drive signal + second drive signal" to drive the brush head to perform alternating motions of "synthetic motion → second motion → synthetic motion", so that when the brush head is cleaning the teeth, it can not only simultaneously and multi-directionally apply forces to remove soft plaque and dental plaque on the tooth surface, but also perform horizontal cleaning of the teeth alone, and massage the gum line while cleaning the gums, which can effectively prevent gum line atrophy.

[0150] Optionally, after simultaneously outputting the first drive signal and the second drive signal, if the circuit board pauses outputting the first drive signal and the second drive signal, it may also alternately output the first drive signal and the second drive signal, and when pausing the output of the first drive signal and the second drive signal, it may again simultaneously output the first drive signal and the second drive signal, so that the circuit board may alternately output "first drive signal + second drive signal → first drive signal → first drive signal + second drive signal → second drive signal → first drive signal + second drive signal" to drive the brush head to perform alternating motions of "synthetic motion → first motion → synthetic motion → second motion → synthetic motion", so that when the brush head is cleaning the teeth, it can not only apply multi-directional force to the soft plaque on the surface of the teeth to peel off the dental plaque, but also perform longitudinal and transverse cleaning of the teeth separately, thereby increasing the cleaning effect of the brush head on the gaps between the teeth and massaging the gum line during the cleaning process.

[0151] In a possible implementation, the electric toothbrush may further include a position detection unit connected to the circuit board.

[0152] The position detection unit can be used to detect the cleaning position of the brush head in the oral cavity; and send the cleaning position to the circuit board.

[0153] Optionally, the handle of the electric toothbrush may further include a position detection unit, and the position detection unit is interconnected with the circuit board for data transmission.

[0154] Optionally, the position detection unit may include but is not limited to an accelerometer and a gyroscope, and the current position of the brush head in the oral cavity may be detected by the accelerometer and the gyroscope; for example, the position detection unit detects that the current position of the brush head in the oral cavity is the tooth side surface and the occlusal surface, or the tongue coating surface. The tooth side surface may include all tooth surfaces on the teeth that are not the occlusal surface, such as the buccal side surface, the lingual side surface, the two surfaces adjacent to the front and rear teeth, and the distal surface and the mesial surface.

[0155] Exemplarily, when the position detection unit detects that the brush head is currently on the tooth side or the occlusal surface, the position information can be sent to the circuit board, so that the circuit board adjusts the first drive signal and / or the second drive signal according to the received position information, so that the cleaning method of the brush head is more in line with the cleaning requirements of different cleaning positions in the oral cavity, thereby improving the cleaning efficiency of the electric toothbrush for the oral cavity.

[0156] Optionally, the circuit board outputs the first drive signal and the second drive signal only when the position information received is the tooth side surface or the occlusal surface, thereby avoiding the problem that the user triggers the oral cleaning command when the brush head is not in contact with the tooth side surface or the occlusal surface, causing the movement of the brush head to cause the cleaning products (for example, toothpaste) placed in the brush head to splash, thereby improving the user experience.

[0157] Exemplarily, according to the cleaning position detected by the position detection unit, the circuit board can adjust the first driving signal and / or the second driving signal according to the cleaning position, which can be implemented in a variety of ways, which are introduced as follows:

[0158] Implementation method 1:

[0159] If the cleaning position detected by the position detection unit is the tooth side surface, the circuit board can be used to perform at least one of the following four operations:

[0160] (1) adjusting the swing amplitude of the first movement to be greater than the movement amplitude of the second movement;

[0161] (2) adjusting the duty cycle of the first drive signal to be greater than the duty cycle of the second drive signal;

[0162] (3) adjusting the vibration frequency of the first motion to be greater than the vibration frequency of the second motion;

[0163] (4) The driving frequency of the first driving signal is adjusted to be greater than the driving frequency of the second driving signal.

[0164] Exemplarily, since the area on the tooth side that needs to be cleaned is larger, when the position detection unit detects that the brush head is currently on the tooth side, the position information can be sent to the circuit board, so that the circuit board adjusts the swing amplitude of the brush head in the first movement to be greater than the movement amplitude of the second movement according to the received position information; and / or, the swing amplitude of the first movement and the movement amplitude of the second movement are adjusted by adjusting the duty cycle of the first drive signal and the duty cycle of the second drive signal, that is, adjusting the duty cycle of the first drive signal to be greater than the duty cycle of the second drive signal, thereby improving the cleaning ability of the brush head on the tooth side.

[0165] For example, when the position detection unit detects that the brush head is currently on the side surface of the tooth, the circuit board can adjust the swing amplitude of the brush head in the first movement to be greater than the movement amplitude of the second movement, that is, the longitudinal swing amplitude of the brush head is greater than the lateral movement amplitude, thereby increasing the longitudinal cleaning area of ​​the brush head on the side surface of the tooth, reducing the missed area when the brush head cleans the side surface of the tooth, and cleaning the side surface of the tooth more comprehensively.

[0166] For another example, when the position detection unit detects that the brush head is currently on the side surface of the tooth, the circuit board can adjust the duty cycle of the first drive signal to be greater than the duty cycle of the second drive signal, so as to adjust the swing amplitude of the first movement of the brush head to be greater than the movement amplitude of the second movement, thereby increasing the longitudinal cleaning area of ​​the brush head on the side surface of the tooth, reducing the missed area when the brush head cleans the side surface of the tooth, and cleaning the side surface of the tooth more comprehensively.

[0167] Exemplarily, since the area on the tooth side that needs to be cleaned is larger and may include more soft plaque and dental plaque, when the position detection unit detects that the brush head is currently on the tooth side, the position information can be sent to the circuit board, so that the circuit board adjusts the vibration frequency of the brush head in the first movement to be greater than the vibration frequency of the second movement according to the received position information; and / or, the vibration frequency of the first movement and the vibration frequency of the second movement are adjusted by adjusting the driving frequency of the first drive signal and the driving frequency of the second drive signal, that is, the driving frequency of the first drive signal is adjusted to be greater than the driving frequency of the second drive signal.

[0168] For example, when the position detection unit detects that the brush head is currently on the side surface of the tooth, the circuit board can adjust the vibration frequency of the brush head in the first movement to be greater than the vibration frequency of the second movement, so that the brush head applies a larger longitudinal peeling force to the soft plaque and dental plaque on the tooth surface when cleaning the side surface of the tooth, thereby performing a deeper cleaning of the soft plaque and dental plaque on the side surface of the tooth.

[0169] For another example, when the position detection unit detects that the brush head is currently on the side surface of the tooth, the circuit board can adjust the driving frequency of the first driving signal to be greater than the driving frequency of the second driving signal, so as to adjust the first movement vibration frequency of the brush head to be greater than the second movement vibration frequency, so that the brush head applies a greater longitudinal peeling force to the soft plaque and dental plaque on the tooth surface when cleaning the side surface of the tooth, thereby improving the cleaning effect of the brush head on the side surface of the tooth.

[0170] Implementation method 2:

[0171] When the cleaning position detected by the position detection unit is the occlusal surface, the circuit board can be used to perform at least one of the following four operations:

[0172] (1) adjusting the swing amplitude of the first movement to be smaller than the movement amplitude of the second movement;

[0173] (2) adjusting the duty cycle of the first drive signal to be smaller than the duty cycle of the second drive signal;

[0174] (3) adjusting the vibration frequency of the first motion to be smaller than the vibration frequency of the second motion;

[0175] (4) The driving frequency of the first driving signal is adjusted to be lower than the driving frequency of the second driving signal.

[0176] Illustratively, since the area of ​​the occlusal surface that needs to be cleaned is small and narrow, in order to avoid the brush head missing the occlusal surface when cleaning the occlusal surface, when the position detection unit detects that the brush head is currently on the occlusal surface, the position information can be sent to the circuit board, so that the circuit board adjusts the swing amplitude of the brush head in the first movement to be smaller than the movement amplitude of the second movement according to the received position information; and / or adjusts the duty cycle of the first drive signal to be smaller than the duty cycle of the second drive signal, thereby improving the cleaning efficiency of the brush head on the occlusal surface.

[0177] For example, when the position detection unit detects that the brush head is currently on the occlusal surface, the circuit board can adjust the swing amplitude of the brush head in the first movement to be smaller than the movement amplitude of the second movement, that is, the longitudinal swing amplitude of the brush head is smaller than the lateral movement amplitude. This can avoid the problem that when the brush head swings too much in the longitudinal direction, only a small area of ​​the brush head is in contact with the occlusal surface, resulting in low cleaning efficiency, thereby improving the cleaning efficiency of the brush head on the occlusal surface.

[0178] For another example, when the position detection unit detects that the brush head is currently on the occlusal surface, the circuit board can adjust the duty cycle of the first drive signal to be smaller than the duty cycle of the second drive signal, so as to adjust the swing amplitude of the first movement of the brush head to be smaller than the movement amplitude of the second movement, thereby avoiding the problem of low cleaning efficiency due to excessive longitudinal swing of the brush head and improving the cleaning efficiency of the brush head on the occlusal surface.

[0179] For example, since the area of ​​the occlusal surface that needs to be cleaned is small and narrow, there may be uneven areas, and there may be food residues that are difficult to clean in the uneven areas. When the position detection unit detects that the brush head is currently on the occlusal surface, the position information can be sent to the circuit board, so that the circuit board adjusts the vibration frequency of the brush head in the first movement to be lower than the vibration frequency of the second movement according to the received position information; and / or adjusts the driving frequency of the first driving signal to be lower than the driving frequency of the second driving signal, so that the brush head can exert a larger lateral peeling force on the food residue, making the food residue on the occlusal surface easier to clean.

[0180] For example, when the position detection unit detects that the brush head is currently on the occlusal surface, the circuit board can adjust the vibration frequency of the brush head in the first movement to be lower than the vibration frequency of the second movement, that is, the vibration frequency of the second movement is higher than the vibration frequency of the first movement, so that the brush head applies a larger lateral peeling force when cleaning the occlusal surface, thereby making food residues on the occlusal surface easier to clean, thereby improving the cleaning efficiency of the brush head on the occlusal surface.

[0181] For another example, when the position detection unit detects that the brush head is currently on the occlusal surface, the circuit board can adjust the driving frequency of the first driving signal to be lower than the driving frequency of the second driving signal, so as to adjust the vibration frequency of the first movement of the brush head to be lower than the vibration frequency of the second movement, thereby allowing the brush head to apply a larger lateral peeling force when cleaning the occlusal surface, making it easier to clean food residues on the occlusal surface and improving the cleaning efficiency of the brush head on the occlusal surface.

[0182] Implementation method three:

[0183] According to the cleaning position detected by the position detection unit, the circuit board can be used to perform at least one of the following two:

[0184] (1) adjusting the duty cycle of the first drive signal corresponding to the tooth side surface to be greater than the duty cycle of the first drive signal corresponding to the occlusal surface;

[0185] (2) The driving frequency of the second driving signal corresponding to the tooth side surface is adjusted to be smaller than the driving frequency of the second driving signal corresponding to the occlusal surface.

[0186] For example, since the area that needs to be cleaned on the side surfaces of the teeth is larger than the area that needs to be cleaned on the occlusal surface, the soft plaque and dental plaque on the side surfaces of the teeth may be far greater than the soft plaque and dental plaque on the occlusal surface; therefore, in order to improve the cleaning efficiency of the brush head on the side surfaces of the teeth, the circuit board can adjust the duty cycle of the first drive signal corresponding to the side surfaces of the teeth to be larger than the duty cycle of the first drive signal corresponding to the occlusal surface, so that the swing amplitude of the first movement corresponding to the brush head on the side surfaces of the teeth is larger than the swing amplitude of the first movement corresponding to the occlusal surface, thereby making the cleaning area of ​​the brush head on the side surfaces of the teeth larger than the cleaning area of ​​the occlusal surface, so as to clean more soft plaque and dental plaque on the side surfaces of the teeth, thereby improving the cleaning efficiency of the brush head on the side surfaces of the teeth.

[0187] Furthermore, since the swing amplitude of the first motion can be adjusted by adjusting the duty cycle of the first drive signal, that is, adjusting the duty cycle of the first drive signal corresponding to the tooth side surface to be greater than the duty cycle of the first drive signal corresponding to the occlusal surface, the circuit board can adjust the swing amplitude of the first motion corresponding to the tooth side surface to be greater than the swing amplitude of the first motion corresponding to the occlusal surface.

[0188] Alternatively, the circuit board may directly adjust the swing amplitude of the first movement corresponding to the tooth side surface to be greater than the swing amplitude of the first movement corresponding to the occlusal surface.

[0189] For example, when the brush head is cleaning the side surface of the tooth, it may come into contact with a large area of ​​the gums. If the vibration frequency of the brush head's lateral movement is too high, it may damage the gums. However, when the brush head is cleaning the occlusal surface, it will not come into contact with the gums, and naturally will not damage the gums. Therefore, in order to protect the gums, the circuit board can adjust the driving frequency of the second driving signal corresponding to the side surface of the tooth to be lower than the driving frequency of the second driving signal corresponding to the occlusal surface, thereby avoiding damaging the gums when the brush head is cleaning the side surface of the tooth, so as to protect the gums.

[0190] Furthermore, since the vibration frequency of the second motion can be adjusted by adjusting the driving frequency of the second driving signal, that is, the driving frequency of the second driving signal corresponding to the tooth side surface is lower than the driving frequency of the second driving signal corresponding to the occlusal surface, the circuit board can adjust the vibration frequency of the second motion corresponding to the tooth side surface to be lower than the vibration frequency of the second motion corresponding to the occlusal surface.

[0191] Alternatively, the circuit board can directly adjust the vibration frequency of the second movement corresponding to the tooth side surface to be smaller than the vibration frequency of the second movement corresponding to the occlusal surface.

[0192] Optionally, if the position detection unit detects that the brush head is not in contact with the tooth side surface and the occlusal surface, the circuit board suspends the output of the first drive signal and the second drive signal.

[0193] Exemplarily, when the position detection unit detects that the brush head is not currently in contact with the tooth side surface and the occlusal surface, the position information can be sent to the circuit board to cause the circuit board to suspend the output of the first drive signal and / or the second drive signal, thereby preventing the brush head from moving when it is not in contact with the tooth side surface or the occlusal surface. That is, when the brush head is not currently in contact with the tooth side surface or the occlusal surface, the brush head is in a stationary state, thereby avoiding the loss of energy consumption of the electric toothbrush when the brush head is not cleaning the teeth, thereby improving the battery life of the electric toothbrush.

[0194] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0195] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric toothbrush, characterized in that: It includes a brush handle, a circuit board, a bidirectional motor and a brush head, wherein the circuit board is connected to the bidirectional motor, and both the circuit board and the bidirectional motor are arranged in the brush handle, and the bidirectional motor is connected to the brush head; wherein, The circuit board is used to output a first driving signal and a second driving signal; and The bidirectional motor is used to drive the brush head to generate a first movement relative to the brush handle based on the first driving signal; and the bidirectional motor is used to drive the brush head to generate a second movement relative to the brush handle based on the second driving signal; The first movement and the second movement have different movement directions; the circuit board simultaneously outputs the first drive signal and the second drive signal to make the brush head perform a combined movement of the first movement and the second movement.

2. The electric toothbrush according to claim 1, characterized in that The bidirectional motor includes a first driving mechanism and a second driving mechanism; the first driving mechanism and the second driving mechanism are both connected to the brush head; wherein, The first driving mechanism is used to drive the brush head to generate the first motion based on the first driving signal; The second driving mechanism is used to drive the brush head to generate the second motion based on the second driving signal.

3. The electric toothbrush according to claim 2, characterized in that The first driving mechanism is used to drive the brush head to swing back and forth with the extension direction of the brush head length as the axis based on the first driving signal; The second driving mechanism is used to drive the brush head to reciprocate along the length extension direction of the brush head based on the second driving signal.

4. The electric toothbrush according to claim 2 or 3, characterized in that: The first driving mechanism and the second driving mechanism are arranged along the extending direction of the brush handle.

5. The electric toothbrush according to claim 2 or 3, characterized in that: The bidirectional motor further includes a first output shaft and a second output shaft; the first output shaft is different from the second output shaft, the first output shaft is connected to the first drive mechanism, and the second output shaft is connected to the second drive mechanism; the first output shaft and the second output shaft are both connected to the brush head; wherein The first output shaft is used to drive the brush head to perform the first movement under the first driving signal; and The second output shaft is used to drive the brush head to perform the second movement under the second driving signal.

6. The electric toothbrush according to claim 2 or 3, characterized in that: The bidirectional motor further includes a third output shaft; the third output shaft is connected to the first driving mechanism and the second driving mechanism respectively; the third output shaft is connected to the brush head; The third output shaft is used to drive the brush head to perform the first movement under the first driving signal; and The third output shaft is used to drive the brush head to perform the second movement under the second driving signal.

7. The electric toothbrush according to any one of claims 1 to 3, characterized in that: The vibration frequency of the first motion is equal to the vibration frequency of the second motion; and / or the driving frequency of the first driving signal is equal to the driving frequency of the second driving signal.

8. The electric toothbrush according to claim 7, characterized in that The swing amplitude of the first motion is smaller than or equal to the movement amplitude of the second motion; and / or the duty cycle of the first driving signal is smaller than or equal to the duty cycle of the second driving signal.

9. The electric toothbrush according to claim 7, characterized in that: There is a preset time difference between the output time of the first driving signal and the output time of the second driving signal; Among them, the preset time difference is the sum of N cycle lengths and one quarter of the cycle length; or, the preset time difference is the sum of N cycle lengths and three quarters of the cycle length; the cycle length is the duration of a single complete output of the first drive signal or the second drive signal; N is an integer greater than or equal to 0.

10. The electric toothbrush according to any one of claims 1 to 3, characterized in that: The circuit board is also used for: Suspending output of the first driving signal and the second driving signal, and outputting a single driving signal; wherein the single driving signal is the first driving signal or the second driving signal; The output of the single driving signal is suspended, and the first driving signal and the second driving signal are outputted again simultaneously.

11. The electric toothbrush according to any one of claims 1 to 3, characterized in that: The vibration frequency of the first motion is greater than the vibration frequency of the second motion; and / or the driving frequency of the first driving signal is greater than the driving frequency of the second driving signal.

12. The electric toothbrush according to claim 11, characterized in that The vibration frequency of the first motion is greater than the vibration frequency of the second motion, comprising: The vibration frequency of the first motion is greater than or equal to twice the vibration frequency of the second motion.

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