Electric toothbrush, control method for oral care device, and related product

Abstract

The present application discloses an electric toothbrush. The electric toothbrush comprises: a handle housing; a mounting bracket, arranged in the handle housing; and a driving motor, comprising a stator assembly and a rotor assembly. The stator assembly is arranged in the mounting bracket and surrounds the rotor assembly. The rotor assembly can rotate relative to the stator assembly. The rotor assembly comprises an output shaft. A part of the output shaft extends out of the handle housing and is connected to a brush head. The rotor assembly is provided with a first limiting piece. At least one of the stator assembly, the mounting bracket, and the handle housing is provided with a second limiting piece. The first limiting piece and the second limiting piece are coordinated to define the rotation angle range of the rotor assembly relative to the stator assembly. The rotor assembly of the electric toothbrush of embodiments of the present application has a limited rotation range; therefore, it is easier to apply toothpaste to the brush head, providing a good user experience. In addition, the present application further discloses a control method for an oral care device, and a related product.

Description

Control methods for electric toothbrushes, oral care equipment, and related products

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on April 3, 2024, with application number 202420690560.3 and title “Electric Toothbrush”, and the Chinese patent application filed with the State Intellectual Property Office of China on April 3, 2024, with application number 202410405540.1 and title “Control Method and Related Products of Oral Care Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of oral cleaning equipment, and in particular to an electric toothbrush, a control method for oral care equipment, and related products. Background Art

[0004] In the related art, an electric toothbrush includes a motor, which drives the brush head to move. The motor includes a rotor and a stator. The rotor can rotate 360° relative to the stator. Since the position of the rotor is not fixed, when toothpaste is squeezed onto the brush head, the brush head may rotate, and the toothpaste may fall to the ground or be smeared to other parts of the brush head, affecting the user experience. Summary of the Invention

[0005] This application provides an electric toothbrush with a rotor assembly having a limited rotation range, making it easier to apply toothpaste to the brush head and providing a good user experience. Furthermore, this application provides a control method and related products for an oral care device, which can limit the rotor connected to the brush head to a certain range, making it easier for the user to accurately apply toothpaste to the brush head and preventing the rotor from colliding with a limiting member.

[0006] In order to achieve the above-mentioned objectives, in a first aspect, an embodiment of the present application provides an electric toothbrush, comprising: a handle housing;

[0007] The mounting bracket is arranged in the handle shell; the driving motor includes a stator assembly and a rotor assembly, the stator assembly is arranged in the mounting bracket and surrounds the rotor assembly, the rotor assembly is rotatable relative to the stator assembly, and the rotor assembly includes an output shaft, a portion of which extends out of the handle shell to be connected to the brush head; wherein, the rotor assembly is provided with a first limit member, and at least one of the stator assembly, the mounting bracket and the handle shell is provided with a second limit member, and the first limit member and the second limit member cooperate to limit the rotation angle range of the rotor assembly relative to the stator assembly.

[0008] In some embodiments of the present application, the output shaft includes an extension section, which is located outside the stator assembly, and a portion of the extension section extends out of the handle shell to connect with the brush head; the electric toothbrush is constructed in at least one of the following ways: the portion of the extension section located inside the mounting bracket is provided with the first limit member, and the inner wall of the mounting bracket is provided with the second limit member; the portion of the extension section located outside the mounting bracket is provided with the first limit member, and the inner wall of the handle shell is provided with the second limit member; the extension section is provided with the first limit member, and the end of the stator assembly close to the brush head is provided with the second limit member.

[0009] In some embodiments of the present application, one of the first limiting member and the second limiting member is configured as a limiting protrusion and the other is configured as a limiting groove, the limiting groove extends along the circumference of the output shaft, and the limiting protrusion is located in the limiting groove.

[0010] In some embodiments of the present application, when the second limiting member is constructed as the limiting groove and is provided on the mounting bracket, the mounting bracket includes a first bracket and a second bracket, the first bracket and the second bracket are respectively provided on radially opposite sides of the output shaft, and the first bracket and the second bracket are detachably connected.

[0011] In some embodiments of the present application, when the second limiting member is constructed as the limiting groove and is provided on the handle shell, the handle shell is an integrated structure; wherein, the limiting groove is open on the side facing away from the brush head, or the handle shell is further provided with a guide groove, which is connected to the side of the limiting groove facing away from the brush head and extends along the axial direction of the output shaft.

[0012] In some embodiments of the present application, the stator assembly includes a housing and a stator core, and the stator core is disposed in the housing; the rotor assembly also includes a rotor core, which is sleeved on the output shaft and rotates synchronously with the output shaft, and the stator core is sleeved on the rotor core; wherein, one of the stator core and the rotor core is provided with a winding and the other is provided with a permanent magnet.

[0013] In some embodiments of the present application, the rotor core is provided with the first limit member, and at least one of the stator core and the casing is provided with the second limit member; wherein, the first limit member is located on the side of the drive motor facing the brush head, and the winding wire is located on the side of the drive motor facing away from the brush head.

[0014] In some embodiments of the present application, the rotor assembly further includes: a mounting seat, which is sleeved on the output shaft and located on the side of the stator assembly facing away from the brush head, and the first limiting member is located on the side of the stator assembly facing the brush head; a position detection member, which is provided on the side of the mounting seat facing away from the brush head, and is used to detect the position of the output shaft relative to the stator assembly.

[0015] In some embodiments of the present application, the rotor assembly further includes: a mounting seat, which is sleeved on the output shaft and located on the side of the stator assembly facing away from the brush head, the outer peripheral surface of the mounting seat is provided with the first limit member, the stator assembly includes an end cover, an end of the housing facing away from the brush head is provided with an open opening, the end cover is connected to the housing for sealing the open opening, and the side of the end cover facing away from the brush head is provided with the second limit member; a position detection member is provided on the side of the mounting seat facing away from the brush head, for detecting the position of the output shaft relative to the stator assembly.

[0016] In some embodiments of the present application, the electric toothbrush further includes: a first seal, arranged between the output shaft and the mounting bracket, and / or arranged between the output shaft and the handle shell; wherein the first limiting member is located on the side of the first seal facing away from the brush head.

[0017] In some embodiments of the present application, the electric toothbrush further includes: a second seal, disposed between the handle shell and the mounting bracket, the second seal being closer to the brush head relative to the mounting bracket, and the first limiting member not exceeding one end of the mounting bracket toward the brush head.

[0018] In some embodiments of the present application, the electric toothbrush further includes: a buffer member, which is arranged between the first limit member and the second limit member in the circumferential direction of the output shaft, and when the first limit member and the second limit member are close to each other, the buffer member is used to buffer and absorb the force between the first limit member and the second limit member.

[0019] In some embodiments of the present application, the first limiting member is an elastic member, the output shaft is provided with a socket, and the first limiting member is inserted into the socket.

[0020] In some embodiments of the present application, the electric toothbrush further includes: a force detection component, provided on the output shaft, for detecting the force condition of the output shaft; and a circuit board, connected to the force detection component via a flexible electrical connector.

[0021] In some embodiments of the present application, the electric toothbrush further includes: a first seal, arranged between the output shaft and the mounting bracket, and / or between the output shaft and the handle shell; wherein the force detection component is located on the side of the first seal facing away from the brush head.

[0022] In some embodiments of the present application, the force detection member and the first limit member are located on opposite sides of the stator assembly; and / or one of the force detection member and the first limit member is located inside the housing of the stator assembly and the other is located outside the housing.

[0023] In some embodiments of the present application, the circuit board is provided with a first electrical connection point, and the first electrical connection point is located between the axial center of the stator assembly and the force detection member in the axial direction of the output shaft.

[0024] In some embodiments of the present application, the electric toothbrush further includes: a circuit board, provided with a first electrical connection position and a second electrical connection position, the first electrical connection position being closer to the brush head relative to the second electrical connection position; a force detection component, provided on the side of the stator assembly facing the brush head and connected to the first electrical connection position, for detecting the force condition of the output shaft; a position detection component, provided on the side of the stator assembly facing away from the brush head and connected to the second electrical connection position for detecting the position of the output shaft relative to the stator assembly.

[0025] In some embodiments of the present application, the first electrical connection position is closer to the brush head than the position detection member.

[0026] In some embodiments of the present application, the electric toothbrush further includes: a reset member, the rotor assembly is connected to one end of the reset member, and at least one of the handle shell, the mounting bracket and the stator assembly is connected to the other end of the reset member, and the reset member has a reset force to reset the rotor assembly to an initial angle.

[0027] In some embodiments of the present application, the rotation angle range of the rotor assembly relative to the stator assembly is 15° to 60°.

[0028] In some embodiments of the present application, the drive motor is configured as a servo motor.

[0029] The electric toothbrush in the embodiment of the present application can limit the rotation angle range of the rotor assembly relative to the stator assembly by providing a first limit member and a second limit member. Therefore, the rotation angle range of the brush head relative to the stator assembly is also limited, and thus the rotation angle range of the brush head relative to the handle shell is also limited. When squeezing toothpaste onto the brush head, even if the brush head rotates, it is not easy for the toothpaste to fall off the brush head or be smeared to other locations, thereby improving the efficiency and accuracy of toothpaste application and providing a good user experience.

[0030] In a second aspect, the present application further discloses a control method for an oral care device, wherein the oral care device includes a motor, the motor includes a rotor, and the oral care device further includes a limiter, wherein the limiter is used to limit the position of the rotor to a first range when the motor is not in an operating state; the method includes:

[0031] When the motor is in working state, the rotor is controlled to reciprocate within a target range, the target range is within the first range, and the first limit position corresponding to the target range does not overlap with the second limit position corresponding to the first range, so as to avoid the rotor colliding with the limit member during movement.

[0032] In a third aspect, the present application further discloses a control device for an oral care device, the oral care device comprising a motor, the motor comprising a rotor, the oral care device further comprising a limiter, the limiter being configured to limit the rotor within a first range when the motor is not in operation; the device comprising:

[0033] A first control unit is used to control the rotor to reciprocate within a target range when the motor is in a working state, the target range is within the first range, and the first limit position corresponding to the target range does not overlap with the second limit position corresponding to the first range, so as to avoid the rotor colliding with the limit member during movement.

[0034] In a fourth aspect, the present application further discloses an electronic device, comprising:

[0035] a memory storing executable program code;

[0036] a processor coupled to the memory;

[0037] The processor calls the executable program code stored in the memory to execute the method disclosed in the second aspect of the embodiment of the present application.

[0038] In a fifth aspect, the present application discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute the method disclosed in the second aspect of the embodiment of the present application.

[0039] In a sixth aspect, the present application discloses a computer program product, which, when run on a computer, enables the computer to execute part or all of the steps of any one of the methods of the second aspect of the embodiments of the present application.

[0040] In the seventh aspect, the present application discloses an application publishing platform, which is used to publish a computer program product, wherein when the computer program product is run on a computer, the computer executes part or all of the steps of any one method of the second aspect of the embodiment of the present application.

[0041] The present application can be applied to an oral care device, which includes a motor, which includes a rotor. The oral care device may also have a limiter, which is used to limit the position of the rotor to a first range when the motor is not in a working state, thereby facilitating the user to accurately apply toothpaste on the brush head and improving the user's usage experience; in addition, when the motor is in a working state, the rotor can be controlled to reciprocate within a target range, wherein the target range is within the first range, and the first limit position corresponding to the target range does not coincide with the second limit position corresponding to the first range, thereby avoiding the rotor from colliding with the limiter during movement, thereby avoiding damage to the motor and avoiding noise caused by the collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0043] FIG1 is a schematic structural diagram of an electric toothbrush according to an embodiment of the present application;

[0044] FIG2 is an exploded view of an electric toothbrush according to an embodiment of the present application;

[0045] FIG3 is a cross-sectional view of a driving motor and a mounting bracket of an electric toothbrush according to an embodiment of the present application;

[0046] FIG4 is a second cross-sectional view of the driving motor and mounting bracket of the electric toothbrush according to an embodiment of the present application;

[0047] FIG5 is a schematic diagram of the cooperation between the first bracket and the mounting bracket of the electric toothbrush according to an embodiment of the present application;

[0048] FIG6 is a schematic diagram showing the cooperation between the second bracket and the mounting bracket of the electric toothbrush according to an embodiment of the present application;

[0049] FIG7 is a schematic diagram of the structure of a driving motor of an electric toothbrush according to an embodiment of the present application;

[0050] FIG8 is a second structural diagram of the driving motor of the electric toothbrush according to an embodiment of the present application;

[0051] FIG9 is a cross-sectional view of a driving motor of an electric toothbrush according to an embodiment of the present application;

[0052] FIG10 is a cross-sectional view of the driving motor, mounting bracket, first seal, and second seal of the electric toothbrush according to an embodiment of the present application.

[0053] FIG11 is a schematic structural diagram of an electric toothbrush disclosed in an embodiment of the present application;

[0054] FIG12 is a schematic structural diagram of a motor disclosed in an embodiment of the present application;

[0055] FIG13 is a schematic diagram of a rotor motion range disclosed in an embodiment of the present application;

[0056] FIG14 is a flow chart of a control method of an oral care device disclosed in an embodiment of the present application;

[0057] FIG15 is a flow chart of another method for controlling an oral care device disclosed in an embodiment of the present application;

[0058] FIG16 is a schematic diagram of a rotor motion mode disclosed in an embodiment of the present application;

[0059] FIG17 is a schematic diagram of a target range disclosed in an embodiment of the present application;

[0060] FIG18 is a schematic diagram of a rotor according to an embodiment of the present application, wherein the range of motion exceeds a first range;

[0061] FIG19 is a flow chart of another method for controlling an oral care device disclosed in an embodiment of the present application;

[0062] FIG20 is a schematic structural diagram of a control device of an oral care device disclosed in an embodiment of the present application;

[0063] FIG21 is a schematic structural diagram of an oral care device disclosed in an embodiment of the present application.

[0064] Explanation of the accompanying drawings: Electric toothbrush 1; handle shell 10; brush head 11; mounting bracket 20; first bracket 21; second bracket 22; drive motor 30; stator assembly 31; second limiter 311; housing 312; winding 3131; end cover 314; rotor assembly 32; output shaft 321; extension section 3211; socket 3212; first limiter 322; rotor core 323; permanent magnet 3231; mounting base 324; position detection member 325; first seal 40; second seal 50; circuit board 80; reset member 90. Electric toothbrush 100, housing 110, movement 120, mounting bracket 130; first control unit 1002; motor 200, stator 210, rotor 220, output shaft 230; limiter 300, first range 310, target range 320, first sub-limit position 3101, second sub-limit position 3102, third sub-limit position 3201, fourth sub-limit position 3202; reference position 600, vibration amplitude 610, initial reference position 620, swing range 630; swing range 700, first position 710, second position 720, vibration amplitude 730; initial reference position 800, zero position 810, second range 820, third range 830; first control unit 1002, memory 1101, processor 1102. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solutions and advantages of this application clearer, the following part will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0066] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0067] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0069] The electric toothbrush 1 according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0070] As shown in FIG. 1 to FIG. 4 , the electric toothbrush 1 of the embodiment of the present application includes a handle shell 10 , a mounting bracket 20 and a drive motor 30 .

[0071] The mounting bracket 20 is disposed in the handle shell 10, and the drive motor 30 includes a stator assembly 31 and a rotor assembly 32. The stator assembly 31 is disposed in the mounting bracket 20 and surrounds the rotor assembly 32. The rotor assembly 32 is rotatable relative to the stator assembly 31. The rotor assembly 32 includes an output shaft 321, and a portion of the output shaft 321 extends out of the handle shell 10 to connect with the brush head 11.

[0072] Among them, the rotor assembly 32 is provided with a first limit member 322, and at least one of the stator assembly 31, the mounting bracket 20 and the handle shell 10 is provided with a second limit member 311. The first limit member 322 and the second limit member 311 cooperate to limit the rotation angle range of the rotor assembly 32 relative to the stator assembly 31.

[0073] That is to say, the stator assembly 31 is provided with a second limit member 311, or the mounting bracket 20 is provided with a second limit member 311, or the handle shell 10 is provided with a second limit member 311, or both the stator assembly 31 and the mounting bracket 20 are provided with a second limit member 311, or both the mounting bracket 20 and the handle shell 10 are provided with a second limit member 311, or both the stator assembly 31 and the handle shell 10 are provided with a second limit member 311, or the stator assembly 31, the mounting bracket 20 and the handle shell 10 are all provided with a second limit member 311.

[0074] Specifically, the mounting bracket 20 can be connected to the handle shell 10 so that the relative positions of the handle shell 10, the mounting bracket 20, and the stator assembly 31 are fixed, and the handle shell 10 can protect the mounting bracket 20 and the drive motor 30.

[0075] Furthermore, when the rotor assembly 32 rotates relative to the stator assembly 31 , the output shaft 310 drives the brush head 11 to rotate relative to the handle housing 10 to achieve cleaning of the oral cavity. The brush head 11 can clean the teeth.

[0076] By setting the first limit member 322 and the second limit member 311, the rotation angle range of the rotor assembly 32 relative to the stator assembly 31 can be limited. Therefore, the rotation angle range of the brush head 11 relative to the stator assembly 31 is also limited, and thus the rotation angle range of the brush head 11 relative to the handle shell 10 is also limited. When squeezing toothpaste onto the brush head 11, even if the brush head 11 rotates, it is not easy to cause the toothpaste to fall off the brush head 11 or smear the toothpaste to other locations, which provides a good user experience.

[0077] As shown in Figures 2-6 and 10, the above-mentioned output shaft 321 includes an extension section 3211, which is located outside the stator assembly 31. A portion of the extension section 3211 extends out of the handle shell 10 to connect with the brush head 11. The portion of the extension section 3211 located in the mounting bracket 20 is provided with a first limit member 322, and the inner wall of the mounting bracket 20 is provided with a second limit member 311.

[0078] During assembly of the electric toothbrush 1, the drive motor 30 and the mounting bracket 20 are first assembled as a whole, and then the drive motor 30 and the mounting bracket 20 are integrally installed in the handle housing 10. During disassembly of the electric toothbrush 1, the drive motor 30 and the mounting bracket 20 are removed from the handle housing 10 as a whole, and then the drive motor 30 and the mounting bracket 20 are separated. Because the first limiting member 322 and the second limiting member 311 are located within the mounting bracket 20, that is, the first limiting member 322 and the second limiting member 311 are not exposed from the mounting bracket 20, the first limiting member 322 and the second limiting member 311 do not interfere with the inner wall of the handle housing 10, thereby facilitating assembly and disassembly of the electric toothbrush 1.

[0079] The output shaft 321 includes an extension section 3211, which is located outside the stator assembly 31. A portion of the extension section 3211 extends out of the handle housing 10 to connect with the brush head 11. The portion of the extension section 3211 located outside the mounting bracket 20 is provided with a first stopper 322, and the inner wall of the handle housing 10 is provided with a second stopper 311. Since the first stopper 322 and the second stopper 311 are located inside the handle housing 10, that is, the first stopper 322 and the second stopper 311 are not exposed from the handle housing 10, the user generally does not touch the first stopper 322 and the second stopper 311, nor does the user see the first stopper 322 and the second stopper 311. As a result, the surface of the electric toothbrush 1 is smoother, the appearance is more neat, and the user experience is better.

[0080] The output shaft 321 includes an extension section 3211, which is located outside the stator assembly 31. A portion of the extension section 3211 extends out of the handle housing 10 to connect with the brush head 11. The extension section 3211 is provided with a first stopper 322, and a second stopper 311 is provided at one end of the stator assembly 31 near the brush head 11. In this way, the output shaft 321 is limited by the stator assembly 31, and both the first stopper 322 and the second stopper 311 are located outside the housing 310 of the stator assembly 31, thereby avoiding interference with the internal structure of the housing 310 of the stator assembly 31 (e.g., the winding 3131, the lead wires of the winding 3131 for electrical connection to the outside of the stator assembly 31, the permanent magnet 3231, and the stator core, etc.). This prevents interference with the internal layout of the housing 310 and ensures the reliability of the drive motor 30.

[0081] As shown in Figures 4-6, one of the first and second limiting members 322, 311 is configured as a limiting protrusion and the other as a limiting groove. The limiting groove extends along the circumference of the output shaft 321, and the limiting protrusion is located within the limiting groove. By inserting the limiting protrusion into the limiting groove, on one hand, the inner walls of the limiting groove on opposite sides of the circumference of the output shaft 321 can limit the limiting protrusion, thereby limiting the rotational angle range of the rotor assembly 32 relative to the stator assembly 31. On the other hand, during the assembly process of the electric toothbrush 1, the cooperation between the limiting protrusion and the limiting groove can achieve a pre-positioning effect, thereby improving assembly efficiency and assembly accuracy.

[0082] As shown in Figures 4 to 6, when the second limiting member 311 is configured as a limiting groove and is provided on the mounting bracket 20, the mounting bracket 20 includes a first bracket 21 and a second bracket 22, which are respectively provided on radially opposite sides of the output shaft 321, and the first bracket 21 and the second bracket 22 are detachably connected. The limiting groove is provided on the inner wall of the first bracket 21, or the limiting groove is provided on the inner wall of the second bracket 22, or a portion of the limiting groove is provided on the inner wall of the first bracket 21, and the other portion of the limiting groove is provided on the inner wall of the second bracket 22. When the first bracket 21 and the second bracket 22 are connected, the limiting groove forms a single integral groove.

[0083] By setting the first bracket 21 and the second bracket 22 separately, it is convenient to install the drive motor 30 into the installation bracket 20. The first bracket 21 and the second bracket 22 can be separated later to replace, repair and inspect the drive motor 30. The maintenance cost is low, and the limit groove can gradually approach the limit protrusion from the radial direction of the output shaft 321 until the limit protrusion is inserted into the limit groove, and the cooperation between the limit groove and the limit protrusion is more convenient.

[0084] When the second limiting member 311 is configured as a limiting groove and is provided in the handle shell 10, the handle shell 10 is an integrated structure. The outer surface of the handle shell 10 has no gaps, which makes it smoother, more comfortable to hold, and optimizes the visual experience. Typically, the top of the handle shell 10 is used to mount the brush head 11, and the drive motor 30 is installed into the handle shell 10 from the bottom end of the handle shell 10. The drive motor 30 inside the handle shell 10 is also removed from the bottom end of the handle shell 10.

[0085] Among them, the side of the limiting groove facing away from the brush head 11 is open, so that when the drive motor 30 and the handle shell 10 are assembled and disassembled, the limiting protrusion and the side wall of the limiting groove facing away from the brush head 11 will not interfere with each other, which facilitates the disassembly and assembly of the drive motor 30.

[0086] Alternatively, the handle shell 10 is further provided with a guide groove, which is connected to the side of the limit groove facing away from the brush head 11 and extends along the axial direction of the output shaft 321. When the drive motor 30 and the handle shell 10 are assembled, the limit protrusion moves along the guide groove to the limit groove. When the drive motor 30 and the handle shell 10 are assembled and disassembled, the limit protrusion moves out of the limit groove along the guide groove, thereby facilitating the disassembly and assembly of the drive motor 30.

[0087] As shown in Figures 7-9, the stator assembly 31 includes a housing 312 and a stator core. The stator core is disposed within the housing 312. The rotor assembly 32 also includes a rotor core 323. The rotor core 323 is sleeved on the output shaft 321 and rotates synchronously with the output shaft 321. The stator core is sleeved on the rotor core 323. One of the stator core and the rotor core 323 is provided with a winding 3131, and the other is provided with a permanent magnet 3231.

[0088] That is, the stator core is provided with a winding 3131, and the rotor core 323 is provided with a permanent magnet 3231. Since the stator core does not need to rotate, the position of the winding 3131 does not change, thereby reducing the impact of the rotation of the rotor core 323 on the routing of the winding 3131.

[0089] Alternatively, the stator core is provided with a permanent magnet 3231, and the rotor core 323 is provided with a winding 3131. Due to the provision of a first limiter 322 and a second limiter 311, the rotation angle of the rotor core 323 is limited, and the rotation of the rotor core 323 has little effect on the routing of the winding 3131. Therefore, the winding 3131 can be provided on the rotor core 323, and the arrangement of the drive motor 30 is more diverse, so that the drive motor 30 can be suitable for different usage requirements, thereby improving the layout flexibility of the drive motor 30.

[0090] The rotor core 323 is provided with a first stopper 322, and at least one of the stator core and the housing 312 is provided with a second stopper 311. Thus, the drive motor 30 can limit the rotation angle of the rotor assembly 32 solely by its own structure, without requiring adjustments to the mounting bracket 20 and the handle housing 10. The electric toothbrush 1 can utilize the existing mounting bracket 20 and handle housing 10, making production and processing of the electric toothbrush 1 even simpler.

[0091] The first stopper 322 is located on the side of the drive motor 30 facing the brush head 11, and the wires of the winding 3131 are located on the side of the drive motor 30 facing away from the brush head 11. This creates a large distance between the first stopper 322 and the wires of the winding 3131, preventing interference between the first stopper 322 and the wires of the winding 3131 when the rotor assembly 32 rotates. This improves the reliability of the electrical connection of the winding 3131 and ensures circuit safety of the drive motor 30.

[0092] For example, the first limiting member 322 can be a limiting protrusion, the second limiting member 311 can be a limiting groove, and the limiting protrusion is inserted into the limiting groove; or the second limiting member 311 can also be a limiting protrusion, and during the rotation of the rotating assembly relative to the stator assembly 31, the first limiting member 322 and the second limiting member 311 can stop each other, wherein there can be two first limiting members 322, and the second limiting member 311 is located between the two first limiting members 322 in the circumferential direction of the output shaft 321, or there can be two second limiting members 311, and the first limiting member 322 is located between the two second limiting members 311 in the circumferential direction of the output shaft 321.

[0093] The rotor assembly 32 further includes a mounting base 324 and a position detector 325. The mounting base 324 is sleeved on the output shaft 321 and is located on the side of the stator assembly 31 facing away from the brush head 11. The first stopper 322 is located on the side of the stator assembly 31 facing the brush head 11. The position detector 325 is located on the side of the mounting base 324 facing away from the brush head 11 and is used to detect the position of the output shaft 321 relative to the stator assembly 31. The position detector 325 may be a Hall effect sensor, an angle sensor, or the like.

[0094] For example, the position detection component 325 can be connected to the circuit board 80 to feed back the relative position between the rotor assembly 32 and the stator assembly 31 to the circuit board 80. The circuit board 80 can control the operation of the drive motor 30 based on the feedback result, and determine whether the drive motor 30 is working normally.

[0095] In this way, the position detection member 325 and the first limit member 322 are arranged on opposite sides of the stator assembly 31, and the distance between the position detection member 325 and the first limit member 322 is relatively far. On the one hand, the first limit member 322 is prevented from interfering with the detection result of the position detection member 325. On the other hand, when the rotor assembly 32 rotates relative to the stator assembly 31, interference between the first limit member 322 and the wires of the position detection member 325 is prevented, thereby improving the electrical connection reliability of the position detection member 325 and ensuring the circuit safety of the drive motor 30.

[0096] As shown in Figure 8, the rotor assembly 32 further includes a mounting seat 324 and a position detector 325. The mounting seat 324 is sleeved on the output shaft 321 and is located on the side of the stator assembly 31 facing away from the brush head 11. The outer peripheral surface of the mounting seat 324 is provided with a first stopper 322. The stator assembly 31 includes an end cover 314. The end of the housing 312 facing away from the brush head 11 is provided with an open opening. The end cover 314 is connected to the housing 312 and is used to cover the open opening. The side of the end cover 314 facing away from the brush head 11 is provided with a second stopper 311. The position detector 325 is provided on the side of the mounting seat 324 facing away from the brush head 11. The position detector 325 is used to detect the position of the output shaft 321 relative to the stator assembly 31. The position detector 325 can be a Hall sensor, an angle sensor, etc.

[0097] For example, the position detection component 325 can be connected to the circuit board 80 to feed back the relative position between the rotor assembly 32 and the stator assembly 31 to the circuit board 80. The circuit board 80 can control the operation of the drive motor 30 based on the feedback result, and determine whether the drive motor 30 is working normally.

[0098] Furthermore, the stator core and the rotor assembly 32 can be installed into the housing 312 through the opening, and then the end cover 314 and the housing 312 are connected to fix the relative positions of the stator core, the rotor assembly 32 and the housing 312 in the axial direction of the output shaft 321 .

[0099] In this way, the first limit member 322 is integrated into the mounting base 324, reducing the number of parts and the axial size of the drive motor 30, and the second limit member 311 is constructed on the side of the end cover 314 facing away from the brush head 11. There is no need to process the second limit member 311 on the stator core or the inner wall of the casing 312, and the processing of the second limit member 311 is more convenient.

[0100] As shown in FIG10 , the electric toothbrush 1 further includes a first seal 40, which is disposed between the output shaft 321 and the mounting bracket 20, or between the output shaft 321 and the handle housing 10, or between the output shaft 321 and the mounting bracket 20, and between the output shaft 321 and the handle housing 10. The provision of the first seal 40 can prevent liquid from flowing into the mounting bracket 20, thereby improving the sealing performance of the electric toothbrush 1. The first seal 40 can be a soft plastic member, such as rubber.

[0101] The first stopper 322 is located on the side of the first seal 40 facing away from the brush head 11. In this way, the first seal 40 can also prevent liquid from flowing to the first stopper 322, reducing the probability of corrosion and short circuit of the first stopper 322 and improving circuit safety.

[0102] As shown in Figure 10, the above-mentioned electric toothbrush 1 also includes a second seal 50, which is arranged between the handle shell 10 and the mounting bracket 20. The second seal 50 is closer to the brush head 11 relative to the mounting bracket 20, and the first limit member 322 does not exceed the end of the mounting bracket 20 facing the brush head 11.

[0103] By providing the second sealing member 50 , liquid can be prevented from flowing into between the mounting bracket 20 and the handle shell 10 , thereby improving the sealing performance of the electric toothbrush 1 . The second sealing member 50 can be a soft plastic member, such as rubber.

[0104] In addition, since the first limiter 322 is located inside the mounting bracket 20, it can avoid contact between the first limiter 322 and the second seal 50, preventing the first limiter 322 from scratching the second seal 50 during the rotation of the rotating assembly, thereby ensuring the service life and sealing effect of the second seal 50.

[0105] The first sealing member 40 and the second sealing member 50 can be integrated into one piece, which reduces the number of parts, makes assembly and disassembly more convenient, and improves production efficiency.

[0106] The electric toothbrush 1 further includes a buffer member, which is disposed between the first limit member 322 and the second limit member 311 in the circumferential direction of the output shaft 321. When the first limit member 322 and the second limit member 311 approach each other, the buffer member is used to buffer and absorb the force between the first limit member 322 and the second limit member 311. The buffer member has a certain degree of elasticity. For example, the buffer member can be made of a sponge material, foam, or soft rubber material. In this way, the impact force on the first limit member 322 and the second limit member 311 can be reduced, the probability of damage to the first limit member 322 and the second limit member 311 can be reduced, and the noise generated by the collision can be reduced.

[0107] As shown in Figures 2-4 , the first stopper 322 is an elastic member, for example, made of a sponge, foam, or soft rubber material. Thus, when the first stopper 322 contacts the second stopper 311, the first stopper 322 elastically deforms to absorb the impact force, reducing the probability of damage to the first stopper 322 and the second stopper 311, and also reducing noise generated by the collision.

[0108] In addition, the output shaft 321 is provided with a socket 3212, and the first limit member 322 is inserted into the socket 3212, wherein the first limit member 322 and the socket 3212 can be an interference fit, a part of the first limit member 322 is inserted into the socket 3212, and the other part of the first limit member 322 can be stopped at the outer peripheral surface of the output shaft 321.

[0109] In this way, the output shaft 321 and the first limiting member 322 can be made of different materials to ensure the rigidity of the output shaft 321 , and the first limiting member 322 can be easily replaced, which is beneficial to reducing the maintenance cost of the electric toothbrush 1 .

[0110] The electric toothbrush 1 also includes a force detector and a circuit board 80. The force detector is mounted on the output shaft 321 and moves with the output shaft 321. The force detector is used to detect the force applied to the output shaft 321. The circuit board 80 is connected to the force detector via a flexible electrical connector. The force detector can be a torque sensor, and the flexible electrical connector can be a wire or a flexible printed circuit (FPC) 80.

[0111] By providing a force detector, the force applied to the output shaft 321 can be fed back to the circuit board 80, which can then control the movement of the rotor assembly 32 based on the feedback. Furthermore, the flexible electrical connector is susceptible to deformation, ensuring reliable connection with the force detector when it moves to different positions. Because the rotational range of the rotor assembly 32 is limited, the flexible electrical connector is less likely to be damaged by excessive deformation, thus ensuring a reliable electrical connection between the force detector and the circuit board 80.

[0112] As shown in FIG10 , the electric toothbrush 1 further includes a first seal 40, which is disposed between the output shaft 321 and the mounting bracket 20, or between the output shaft 321 and the handle housing 10, or between the output shaft 321 and the mounting bracket 20, and between the output shaft 321 and the handle housing 10. The provision of the first seal 40 can prevent liquid from flowing into the mounting bracket 20, thereby improving the sealing performance of the electric toothbrush 1. The first seal 40 can be a soft plastic member, such as rubber.

[0113] The force detection component is located on the side of the first sealing component 40 facing away from the brush head 11. In this way, the first sealing component 40 can also prevent liquid from flowing toward the force detection component, reducing the probability of corrosion and short circuit of the force detection component, improving circuit safety, and preventing the pressure of the liquid from interfering with the detection results of the force detection component, and avoiding the force detection component from affecting the sealing effect of the first sealing component 40.

[0114] The above-mentioned force detection member and the first limit member 322 are located on opposite sides of the stator assembly 31. In this way, the distance between the force detection member and the first limit member 322 is relatively far. Since the first limit member 322 collides with the second limit member 311, there may be a problem of sudden shape and structural changes in the area near the first limit member 322. Therefore, the deformation of various areas of the output shaft 321 is inconsistent. By setting the distance between the force detection member and the first limit member 322 to be relatively far, on the one hand, the deformation of the area near the first limit member 322 can avoid the impact of the deformation of the area near the first limit member 322 on the detection accuracy of the force detection member, thereby improving the detection accuracy. On the other hand, the movable path of the first limit member 322 can avoid the wires of the force detection member, thereby preventing the first limit member 322 and the wires of the force detection member from interfering with each other.

[0115] One of the force detecting member and the first limiting member 322 is arranged inside the housing 312 of the stator assembly 31 and the other is arranged outside the housing 312. In this way, the distance between the force detecting member and the first limiting member 322 is relatively far. Since the first limiting member 322 collides with the second limiting member 311, there may be a problem of sudden shape structure mutation in the area near the first limiting member 322. Therefore, the deformation of each area of ​​the output shaft 321 is inconsistent. By setting the distance between the force detecting member and the first limiting member 322 to be relatively far, on the one hand, the deformation of the area near the first limiting member 322 is avoided from affecting the detection accuracy of the force detecting member, thereby improving the detection accuracy. On the other hand, the movable path of the first limiting member 322 can avoid the wires of the force detecting member, thereby preventing the first limiting member 322 and the wires of the force detecting member from interfering with each other.

[0116] The above-mentioned circuit board 80 is provided with a first electrical connection position, which is located between the center of the stator assembly 31 and the force detection part in the axial direction of the output shaft 321, that is, in the axial direction of the output shaft 321, the first electrical connection position is located between the center of the stator assembly 31 in its axial direction and the force detection part.

[0117] In this way, the distance between the first electrical connection point and the force detection part is closer. On the one hand, the length of the wire between the first electrical connection point and the force detection part can be shortened. On the other hand, the part of the wire between the first electrical connection point and the force detection part that is worn can be reduced, thereby extending the service life of the wire and improving the electrical connection reliability of the force detection part.

[0118] The electric toothbrush 1 further includes a circuit board 80, a force detector, and a position detector 325. The circuit board 80 is provided with a first electrical connection point and a second electrical connection point, with the first electrical connection point being closer to the brush head 11 than the second electrical connection point. The force detector is located on the side of the stator assembly 31 facing the brush head 11 and is connected to the first electrical connection point. The force detector is used to detect the force applied to the output shaft 321. The position detector 325 is located on the side of the stator assembly 31 facing away from the brush head 11 and is connected to the second electrical connection point. The position detector 325 is used to detect the position of the output shaft 321 relative to the stator assembly 31.

[0119] In this way, the distance between the first electrical connection position and the force detection part is closer, and the distance between the second electrical connection position and the position detection part 325 is closer. On the one hand, the length of the wire between the first electrical connection position and the force detection part, as well as the length of the wire between the second electrical connection position and the position detection part 325 can be shortened. On the other hand, it can avoid line confusion, make the routing clear, and reduce wear.

[0120] The above-mentioned first electrical connection position is closer to the brush head 11 relative to the position detection part 325. In this way, the distance between the first electrical connection position and the force detection part is further reduced, thereby further shortening the length of the wire between the first electrical connection position and the force detection part, and the routing is clearer, further reducing the probability of line confusion.

[0121] As shown in Figures 3, 5, and 6, the electric toothbrush 1 further includes a reset member 90. The rotor assembly 32 is connected to one end of the reset member 90, and at least one of the handle housing 10, the mounting bracket 20, and the stator assembly 31 is connected to the other end of the reset member 90. The reset member 90 has a reset force to reset the rotor assembly 32 to its initial angle. The reset member 90 may be a torsion spring, a spring, or the like.

[0122] When the electric toothbrush 1 is powered off, the reset member 90 can drive the rotor assembly 32 to return to its initial position relative to the stator assembly 31 and keep the rotor assembly 32 in the initial position to facilitate the next use of the electric toothbrush 1. Moreover, since the reset member 90 has the elastic force to keep the rotor assembly 32 in the initial position, when the user applies toothpaste on the brush head 11, the brush head 11 is less likely to rotate and the toothpaste can be applied more smoothly.

[0123] The rotation angle range of the rotor assembly 32 relative to the stator assembly 31 is 15° to 60°. The rotation angle range of the rotor assembly 32 relative to the stator assembly 31 can be 15°, 16°, 18°, 20°, 22°, 24°, 25°, 26°, 28°, 30°, 32°, 34°, 35°, 36°, 38°, 40°, 42°, 44°, 45°, 46°, 48°, 50°, 52°, 54°, 55°, 56°, 58° or 60°.

[0124] When the rotation angle range of the rotor assembly 32 relative to the stator assembly 31 is less than 15°, the rotation angle range of the rotor assembly 32 is too small, resulting in a small rotor angle range of the brush head 11, low oral cleaning efficiency, too long a single brushing time or inadequate cleaning; when the rotation angle range of the rotor assembly 32 relative to the stator assembly 31 is greater than 60°, the rotation angle range of the rotor assembly 32 is too large, when the toothpaste is squeezed onto the brush head 11, the rotation range of the brush head 11 is large, the toothpaste is easily lost from the brush head 11 or the toothpaste is smeared to other locations.

[0125] By setting the rotation angle range of the rotor assembly 32 relative to the stator assembly 31 to 15°~60°, the rotation angle range of the rotor assembly 32 is larger, which can efficiently clean the oral cavity, clean thoroughly and shorten the single brushing time, and the rotation angle range of the rotor assembly 32 will not be too large, so toothpaste can be easily applied to the brush head 11.

[0126] The drive motor 30 is configured as a servo motor. The plurality of windings 3131 can be evenly and spaced apart along the circumference of the drive motor 30, and the plurality of permanent magnets 3231 can be evenly and spaced apart along the circumference of the drive motor 30. This allows the drive motor 30 to control the output shaft 321 based on its position, speed, and torque, achieving closed-loop control of the output shaft 321. This results in high precision, fast response, and stable operation.

[0127] The technical solution of this application will be described in detail below with reference to specific embodiments.

[0128] In order to more clearly introduce the method disclosed in the embodiment of the present application, the application scenarios applicable to the method are first introduced. Optionally, the method can be applied to various oral care devices equipped with motors, including but not limited to: electric toothbrushes, oral irrigators, etc., without limitation here.

[0129] For ease of explanation, the embodiments of the present application are described using an electric toothbrush as an example, which should not be construed as limiting the embodiments of the present application. Please refer to FIG1 , which is a schematic structural diagram of an electric toothbrush disclosed in an embodiment of the present application. The electric toothbrush 100 may include a housing 110 and a movement 120 , wherein the movement 120 may be assembled within the housing 110 , and the movement 120 may include a mounting bracket 130 and a motor 200 , wherein the motor 200 is fixedly mounted on the mounting bracket 130 and extends out of one end of the housing 110 .

[0130] Please refer to Figure 2, which is a schematic diagram of the structure of a motor disclosed in an embodiment of the present application. Optionally, the motor 200 includes a stator 210 and a rotor 220, and the rotor 220 includes an output shaft 230, which extends from one end of the housing 110, and the rotor 220 can rotate relative to the stator 210. Optionally, the output shaft 230 can be connected to a cleaning member (not shown), such as a brush head, to drive the cleaning member to move. Optionally, the type of motor 200 can include a servo motor, which is not limited here.

[0131] In practice, it has been found that the rotor of a traditional motor can rotate 360 ​​degrees relative to the stator. Especially when the motor is not in working condition, the rotor lacks the holding force provided by the electric energy, which will cause the position of the rotor to be unstable. As a result, the brush head may rotate when the user squeezes the toothpaste, causing the toothpaste to fall off or unable to be applied accurately, thereby reducing the user experience.

[0132] The present invention provides a control method for an oral care device, which can be applied to various oral care devices, including the electric toothbrush 100, to solve the above-mentioned technical problems. Please also refer to FIG3 , which is a schematic diagram of a rotor motion range disclosed in the present invention.

[0133] Optionally, the oral care device in the embodiment of the present application may include a limiter 300, which is used to limit the position of the rotor 220 to a first range 310 when the motor 200 is not in operation, thereby preventing the rotor 220 from rotating 360 degrees. Optionally, the orientation of the first range can be consistent with the front orientation of the oral care device, thereby facilitating the user to accurately apply toothpaste to the brush head and improving the user experience.

[0134] In addition, when the motor is in working state, the rotor can be controlled to reciprocate within the target range 320, wherein the target range 320 is within the first range 310, and the first extreme position corresponding to the target range 320 does not coincide with the second extreme position corresponding to the first range 310, thereby preventing the rotor 220 from colliding with the limit member 300 during movement, thereby preventing damage to the motor 200 and avoiding noise generated by the collision.

[0135] Referring again to FIG. 1 , at least one of the stator 210, housing 110, and mounting bracket 130 may optionally be provided with a limiter. Optionally, the limiters may be arranged in pairs and symmetrically, and the number of limiters may be two, four, or six, etc., without limitation. This increases flexibility in the placement of the limiters and facilitates the structural design of the oral care device.

[0136] Based on this, the control method of the oral care device and related products disclosed in the embodiments of the present application are introduced below.

[0137] Please refer to Figure 4, which is a flow chart of a control method for an oral care device disclosed in an embodiment of the present application. Optionally, the method can be applied to an oral care device including the electric toothbrush 100 described above; optionally, the oral care device can include a motor and a limiter, the motor including a rotor, and the limiter is used to limit the position of the rotor to a first range when the motor is not in operation. Optionally, the method can include the following steps:

[0138] 402. When the motor is in operation, control the rotor to reciprocate within a target range, where the target range is within a first range, and a first limit position corresponding to the target range does not overlap with a second limit position corresponding to the first range.

[0139] Please refer to Figure 3 again. It can be understood that since the limit member 300 is set, if the movement range of the rotor is not restricted, the rotor may collide with the limit member 300 during movement, which may cause the motor to generate noise during operation or even damage the motor.

[0140] Alternatively, the oral care device can control the rotor to reciprocate within a target range 320 while the motor is in operation. As shown in FIG3 , the target range 320 is within a first range 310 . The rotor will not contact the limiter 300 when moving within the target range 320 , thereby resolving the problem caused by the provision of the limiter.

[0141] As an optional embodiment, the first limit position corresponding to the target range 320 includes a third sub-limit position 3201 and a fourth sub-limit position 3202 , and the second limit position corresponding to the first range 310 includes a first sub-limit position 3101 and a second sub-limit position 3102 ;

[0142] Optionally, the difference between third sub-limit position 3201 and first sub-limit position 3101 may be greater than or equal to a first threshold, and the difference between fourth sub-limit position 3202 and second sub-limit position 3102 may be greater than or equal to a second threshold. Optionally, the first threshold and the second threshold may be equal or unequal, and typical values ​​of the first and second thresholds may include 1 degree, 2 degrees, etc., which are not limited here.

[0143] By implementing the above method, the difference between the first limit position corresponding to the target range and the second limit position corresponding to the first range must be greater than a certain threshold value to leave sufficient buffer space for the rotor, avoid the possibility of collision between the rotor and the limit member as much as possible, and improve safety.

[0144] Optionally, the target range 320 may have a value range of -60 degrees to 60 degrees, and the first range 310 may have a value range of -70 degrees to 70 degrees, which are not limited here.

[0145] By implementing the methods disclosed in the above embodiments, when the motor is not in a working state, the position of the rotor is limited to a first range by a limit member, thereby facilitating the user to accurately apply toothpaste on the brush head, thereby improving the user experience; in addition, when the motor is in a working state, the rotor can be controlled to reciprocate within a target range, wherein the target range is within the first range, and the first limit position corresponding to the target range does not coincide with the second limit position corresponding to the first range, thereby avoiding collision of the rotor with the limit member during movement, thereby avoiding damage to the motor and noise caused by the collision.

[0146] Please refer to Figure 5, which is a flow chart of another control method for an oral care device disclosed in an embodiment of the present application. Optionally, the method can be applied to an oral care device including the electric toothbrush 100 described above; optionally, the oral care device can include a motor and a limiter, the motor including a rotor, and the limiter is used to limit the position of the rotor to a first range when the motor is not in operation. Optionally, the method can include the following steps:

[0147] 502. When the motor is in operation, the rotor is controlled to vibrate reciprocally based on a reference position according to vibration parameters, and the rotor is controlled to swing based on an initial reference position to change the reference position according to swing parameters; wherein the vibration parameters include vibration amplitude, the swing parameters include swing range, and the target range is greater than or equal to the vibration amplitude plus or minus 1 / 2 of the swing range.

[0148] Please refer to Figure 6, which is a schematic diagram of a rotor motion mode disclosed in an embodiment of the present application. Optionally, the oral care device can control the rotor to reciprocate within a vibration amplitude 610 based on a reference position 600 based on vibration parameters. Furthermore, the oral care device can control the rotor to oscillate within a swing range 630 based on an initial reference position 620 based on swing parameters to change reference position 600, thereby achieving a sweeping vibration motion and improving cleaning effectiveness.

[0149] Optionally, the vibration parameters may include vibration amplitude, vibration strength, and vibration frequency, and the swing parameters may include swing range, swing strength, and swing frequency, etc., without limitation herein. Optionally, the vibration parameters and swing parameters may be determined based on the currently selected care mode of the oral care device, or may be determined based on a parameter adjustment instruction input by the user, without limitation herein.

[0150] It is understood that when the rotor swings to the extreme position of the swing range, the reference position also moves to the extreme position. At this time, the rotor oscillates back and forth based on the extreme position, and the rotor's vibration amplitude exceeds 1 / 2 of the swing range. The vibration amplitude of the rotor exceeding 1 / 2 of the swing range is also the maximum range of the rotor's rotation. Optionally, the vibration amplitude plus or minus 1 / 2 of the swing range can be less than or equal to the target range, thereby limiting the rotor to remain within the target range, that is, within the first range, during the sweeping vibration motion, thereby preventing the rotor from colliding with the limit member.

[0151] By implementing the above method, the oral care device can control the vibration of the rotor while swinging to achieve the effect of sweeping vibration motion, thereby improving the cleaning effect; in addition, the swing range of the rotor can be limited to the target range by adding or subtracting 1 / 2 of the vibration amplitude, thereby limiting the rotor to always be within the first range during the sweeping vibration motion, thereby avoiding collision with the limit member.

[0152] Please refer to Figure 7, which is a schematic diagram of a target range disclosed in an embodiment of the present application. As an optional embodiment, the first limit position corresponding to the target range 320 includes a third sub-limit position 3201 and a fourth sub-limit position 3202, and the swing range 700 includes a first position 710 and a second position 720;

[0153] Optionally, the third sub-limit position 3201 is the position obtained by subtracting 1 / 2 of the vibration amplitude 730 from the first position 710 ; and the fourth sub-limit position 3202 is the position obtained by adding 1 / 2 of the vibration amplitude 730 to the second position 720 .

[0154] By implementing the above method, the oral care device can determine the relationship between the target range, the swing range and the vibration amplitude based on the target range, thereby facilitating the subsequent determination of the swing range and vibration amplitude of the rotor based on the target range.

[0155] Please further refer to Figure 8, which is a schematic diagram of a rotor motion range exceeding a first range disclosed in an embodiment of the present application. Optionally, in a default state, the initial reference position 800 corresponding to the rotor may be a zero position 810. Optionally, the electric toothbrush 100 may have a front face and a back face opposite to the front face. Generally speaking, when the rotor is at the zero position 810, the brush head is located in the center of the front face, thereby meeting the expectations of most users regarding the brush head position and being convenient for users to use.

[0156] In the embodiment of the present application, the initial reference position 800 may not be the zero position 810, but may be offset by a certain angle from the zero position 810. Optionally, the angle at which the initial reference position 800 deviates from the zero position 810 may be set by the user according to usage requirements, or may be set by the electric toothbrush 100 according to a care mode, thereby causing the brush head to move at a certain angle relative to the front of the electric toothbrush 100 to conform to the user's cleaning habits or to meet the cleaning requirements of certain special locations in the oral cavity, thereby increasing the flexibility of the method.

[0157] Referring again to FIG. 8 , assuming that the rotor's currently set initial reference position 800 is zero position 810, the rotor's target range of motion is a second range 820. When the rotor moves within the second range 820, it will not collide with the stopper 300. However, if the initial reference position 800 is reset and deviates from zero position 810, the rotor's target range of motion becomes a third range 830. When the rotor moves within the third range 830, it will collide with the stopper 300. Therefore, if the rotor's currently set initial reference position 800 deviates from zero position 810, it is necessary to consider whether to adjust the rotor's target range of motion to avoid collision between the rotor and the stopper 300.

[0158] As previously described, the target range of the rotor's motion can be determined by the rotor's swing range and vibration amplitude. As an optional implementation, the oral care device can obtain the rotor's currently set initial reference position, which represents the rotor's deviation angle from the zero position when the motor is started. The rotor's swing range and / or vibration amplitude can then be adjusted based on the initial reference position and the first range.

[0159] The swing range and vibration amplitude before adjustment may be the default swing range and vibration amplitude, which may be the swing range and vibration amplitude corresponding to the zero position when the initial reference position is zero, and are not limited thereto.

[0160] Optionally, the oral care device can determine whether the rotor will exceed the first range during movement based on the rotor's currently set starting reference position, swing range and vibration amplitude; optionally, if it will exceed the first range, the swing range and / or vibration amplitude can be adjusted to avoid the subsequent rotor exceeding the first range during movement and colliding with the limit member; optionally, if it does not exceed the first range, the rotor's swing range and / or vibration amplitude does not need to be adjusted, thereby avoiding frequent adjustment of the rotor's swing range and / or vibration amplitude.

[0161] As an optional embodiment, the swing range may include a first position and a second position, the second limit position corresponding to the first range includes a first sub-limit position and a second sub-limit position, the first position is close to the first sub-limit position, and the second position is close to the second sub-limit position;

[0162] Optionally, the oral care device may determine the third position based on the rotor's currently set starting reference position, the first position, and 1 / 2 of the vibration amplitude; optionally, the oral care device may determine a first extreme swing position corresponding to the rotor based on the rotor's currently set starting reference position and the first position, and obtain the third position by subtracting 1 / 2 of the vibration amplitude from the first extreme swing position;

[0163] Furthermore, the oral care device can determine a fourth position based on the rotor's currently set starting reference position, the second position, and 1 / 2 of the vibration amplitude. Alternatively, the oral care device can determine a corresponding second extreme swing position of the rotor based on the rotor's currently set starting reference position and the second position, and then add 1 / 2 of the vibration amplitude to the second extreme swing position to obtain the fourth position.

[0164] Furthermore, the oral care device can determine whether the third position exceeds the first sub-limit position, and whether the fourth position exceeds the second sub-limit position; if the third position exceeds the first sub-limit position, or the fourth position exceeds the second sub-limit position, it can be determined that the rotor will exceed the first range during movement.

[0165] Optionally, the oral care device may adjust the swing range and / or vibration amplitude of the rotor by reducing the swing range and / or reducing the vibration amplitude according to the position difference; wherein, when the third position exceeds the first sub-limit position, the position difference is the absolute value of the difference between the third position and the first sub-limit position, and when the fourth position exceeds the second sub-limit position, the position difference is the absolute value of the difference between the third position and the first sub-limit position.

[0166] For example, if the third position exceeds the first sub-limit position by 5 degrees, the oral care device may reduce the swing range of the rotor by 5 degrees, or reduce the vibration amplitude of the rotor by 5 degrees.

[0167] Optionally, the oral care device may reduce the swing range of the rotor by a first sub-position difference, and reduce the vibration amplitude of the rotor by a second sub-position difference, wherein the sum of the first sub-position difference and the second sub-position difference is the position difference.

[0168] For example, the oral care device may reduce the swing range of the rotor by 3 degrees and the vibration amplitude by 2 degrees; or reduce the swing range of the rotor by 2.5 degrees and the vibration amplitude by 2.5 degrees, which is not limited here.

[0169] By implementing the above method, the oral care device can adjust the swing range and / or vibration amplitude of the rotor to avoid the subsequent movement of the rotor from colliding with the limit member when it is determined that the initial reference position of the rotor deviates, causing the subsequent movement of the rotor to collide with the limit member.

[0170] By implementing the methods disclosed in the above embodiments, when the motor is not in working state, the position of the rotor is limited to the first range by the limiter, so that the user can apply toothpaste accurately on the brush head, thereby improving the user experience; in addition, when the motor is in working state, the rotor can be controlled to reciprocate within the target range, wherein the target range is within the first range, and the first limit position corresponding to the target range does not coincide with the second limit position corresponding to the first range, thereby avoiding the rotor from colliding with the limiter during movement, thereby avoiding damage to the motor and noise caused by the collision; and the oral care device can adjust the swing range and / or vibration amplitude of the rotor when it is determined that the initial reference position of the rotor deviates, causing the subsequent movement of the rotor to collide with the limiter, so as to avoid the subsequent movement of the rotor from colliding with the limiter.

[0171] Please refer to Figure 9, which is a flow chart of another control method for an oral care device disclosed in an embodiment of the present application. Optionally, the method can be applied to an oral care device including the electric toothbrush 100 described above; optionally, the oral care device can include a motor and a limiter, the motor including a rotor, and the limiter is used to limit the position of the rotor to a first range when the motor is not in operation. Optionally, the method can include the following steps:

[0172] 902. When the motor is in operation, control the rotor to reciprocate within a target range, where the target range is within a first range, and a first limit position corresponding to the target range does not overlap with a second limit position corresponding to the first range.

[0173] 904. When the reset condition is met, the rotor is controlled to reset to the zero position, and when a start instruction is received, the rotor is controlled to start moving with the zero position as the starting point.

[0174] Optionally, the oral care device may further include a position detection element, which may include at least one of a Hall effect sensor and an optical element. Optionally, the Hall effect sensor may be disposed on the stator, and a corresponding detection magnet may be disposed on the rotor. The Hall effect sensor senses changes in the magnetic field of the detection magnet to determine the rotation angle of the rotor relative to the stator, and further, based on the rotation angle, may determine whether the rotor is at zero position.

[0175] In other optional embodiments, the optical element passes through a light emitting element and a light receiving element, and the light emitting element and the light receiving element are both arranged on the stator. The rotor is located between the light emitting element and the light receiving element, and a light-transmitting hole is provided on the rotor. The rotation angle of the rotor relative to the stator can be determined according to the number of times the light receiving element receives light, and then it can be determined whether the rotor is at the zero position according to the rotation angle.

[0176] Optionally, when the reset conditions are met, the oral care device can determine whether the current position of the rotor is at the zero position through the position detection component. If it is not at the zero position, the rotor can be controlled to reset to the zero position.

[0177] By implementing the above method, the oral care device can control the rotor to reset to the zero position when it is determined that the reset conditions are met, so that the rotor can subsequently start moving from the zero position as the starting point. The symmetrical movement of the rotor relative to the zero position can make cleaning more comprehensive and thorough, thereby ensuring the cleaning effect.

[0178] Optionally, when the reset condition is met, the oral care device may also control the rotor to reset to the initial reference position, wherein the initial reference position may be the zero position or may not be the zero position, which is not limited here.

[0179] Optionally, the reset condition may include: when the oral care device is in an awake state, detecting that the rotor is not at the zero position; or, the oral care device is in a pause state; or, the working time of the oral care device reaches a first time length.

[0180] Among them, when the oral care device is in the awake state, if it is detected that the rotor is not at the zero position, the rotor is controlled to reset to the zero position in order to avoid the situation where the rotor is not at the zero position when it stops moving due to power failure or other reasons, resulting in the rotor not moving based on the zero position during the next movement, thereby causing the initial movement range of the rotor to change, and causing the rotor to collide with the limit member during movement.

[0181] In addition, when the oral care device is in a paused state, controlling the rotor to reset to the zero position is also to avoid the situation where the rotor is not at the zero position when it stops moving, resulting in the rotor not moving based on the zero position during the next movement, thereby causing the initial movement range of the rotor to change, and causing the rotor to collide with the limit member during movement.

[0182] Furthermore, when the oral care device reaches a first operating time, the rotor is controlled to reset to the zero position so that the rotor does not need to be moved to the zero position the next time the device is turned on, thereby improving the efficiency of the next cleaning and care session. The first operating time can be set by the developer based on extensive development experience or by the user based on actual usage needs, and is not limited here.

[0183] As an optional embodiment, when the oral care device determines that the reset conditions are met, it can determine the current position of the rotor through the position detection part, and then determine the first distance between the current position of the rotor and the limit part; and then determine the first rotation force based on the first distance. Optionally, the first rotation force and the first distance can be negatively correlated, that is, the shorter the first distance, the greater the first rotation force can be; and then the oral care device can control the rotor to reset to the zero position according to the first rotation force.

[0184] Optionally, the oral care device can adjust the rotational force of the motor's rotor by adjusting the voltage provided by the power supply module to the motor. Optionally, the oral care device can determine a first voltage based on the first rotational force, and then control the power supply module to supply power to the motor according to the first voltage.

[0185] By implementing the above method, the oral care device can use a greater rotation force to quickly rotate the rotor back to the zero position for reset when determining that the current position of the rotor is too close to the limiter, thereby avoiding collision between the rotor and the limiter as much as possible.

[0186] As an optional embodiment, after controlling the rotor to reset to the zero position, the oral care device may perform a rotor holding measure on the rotor, where the rotor holding measure is used to keep the rotor at the zero position.

[0187] Optionally, the rotor holding measure may include: controlling the power supply module to continuously supply power to the motor so that the rotor generates a holding force, the holding force being used to keep the position of the rotor at the zero position;

[0188] And / or, detecting whether the rotor deviates from the zero position, and if it is detected that the rotor deviates from the zero position, controlling the rotor to reset to the zero position.

[0189] By implementing the above method, the oral care device can perform rotor holding measures on the rotor to avoid the rotor from deflecting and displacing when subjected to a small force; in addition, in the event that the rotor may overcome the holding force and deflect and displace, the oral care device can also continuously detect the rotor position and reset it to the zero position to keep the rotor at the zero position.

[0190] Optionally, the oral care device may also have a holding state detection function, so that the oral care device can obtain the holding state of the oral care device. The holding state may include a held state and an unheld state, wherein the held state refers to the state in which the oral care device is held by the user, and the unheld state refers to the state in which the oral care device is not held by the user.

[0191] Optionally, the housing of the oral care device may be provided with a pressure sensor and / or a distance sensor, and the oral care device may determine the holding state of the oral care device based on sensor data fed back by the pressure sensor and / or the distance sensor.

[0192] Optionally, if the pressure value fed back by the pressure sensor is greater than or equal to the pressure threshold, it can be determined that the oral care device is in a held state; if the pressure value fed back by the pressure sensor is less than the pressure threshold, it can be determined that the oral care device is in a not held state.

[0193] Optionally, if it is determined that there is an object close to the oral care device based on the distance value fed back by the distance sensor, the oral care device is determined to be in a held state; if it is determined that there is no object close to the oral care device based on the distance value fed back by the distance sensor, the oral care device is determined to be in an unheld state.

[0194] Furthermore, when it is determined that the oral care device is in a gripped state, the above-mentioned rotor holding measures may be performed.

[0195] It should be noted that after the oral care device has been running for a preset time and the rotor stops moving, the user may still clean the oral care device, such as cleaning the brush head. At this time, in order to avoid the rotor deviating from the zero position after cleaning the brush head, the oral care device can continue to perform rotor protection measures to keep the rotor at the zero position; in addition, if the oral care device is in a held state, it means that the user is using the oral care device, so the rotor holding measure can be executed; if the oral care device is not in a held state, it means that the user is not currently using the oral care device, and the rotor holding measure can be omitted to save power consumption of the oral care device.

[0196] As an optional embodiment, when the oral care device controls the rotor to operate within the target range, if it is detected that the care mode of the oral care device has switched, the rotor can be controlled to reduce the movement speed and reset to the zero position; when the rotor is reset to the zero position, the rotor is controlled to start moving with the zero position as the starting point according to the movement method indicated by the switched care mode.

[0197] Implementing the above method, when a care mode switch is detected, the rotor is controlled to slow down and return to the zero position, thus protecting the motor. Furthermore, when switching care modes, the rotor is reset to the zero position, facilitating the complete execution of the next care mode, thereby ensuring effective cleaning. Furthermore, if the execution motion is arranged symmetrically with respect to the zero position, brushing can be more comprehensive and thorough, improving cleaning effectiveness.

[0198] As an optional embodiment, the oral care device may further include a reset member, which is used to reset the rotor to a zero position when the oral care device is in a non-awakened state. Optionally, the reset member may include an elastic reset member or a magnetic reset member, which is not limited here.

[0199] In an embodiment of the present application, when the oral care device is in the awake state, the power supply module can supply power to the motor to drive the rotor to reset. However, when the oral care device is in the non-awakened state, the power supply module does not supply power to the motor, and the rotor cannot be reset. By implementing the above method, the elastic force or magnetic force provided by the reset member can be used to drive the rotor to reset, thereby enabling the oral care device to reset the rotor to the zero position even when it is in the non-awakened state. Consequently, the rotor does not need to be reset the next time the oral care device is awakened.

[0200] As an optional embodiment, when the oral care device is in the awake state, if the initial reference position of the rotor changes, or the position of the rotor exceeds the first range when the motor is running due to other reasons, the rotor will collide with the limit member. In order to avoid damage to the motor and noise, the oral care device can control the power supply module to stop supplying power to the motor.

[0201] Optionally, when the rotor position exceeds the first range for a second time period, the power supply module can be controlled to stop supplying power to the motor. The second time period can be set by the developer based on extensive development experience and is not limited here.

[0202] By implementing the above method, when it is determined that the rotor exceeds the first range and will collide with the limit member, the power supply module can be controlled to stop supplying power to the motor, so that the rotor stops moving, thereby avoiding damage to the motor and generating noise.

[0203] Referring again to FIG. 2 , as an optional embodiment, rotor 220 may include an output shaft 230 , which may be connected to a cleaning member (e.g., a brush head) to drive the cleaning member. Optionally, the output shaft may be provided with electronic components, including pressure detection devices, distance sensors, and the like, which are not limited herein.

[0204] Since the oral care device in the embodiment of the present application has a limiter, the movement of the rotor can be restricted within the first range so that the rotor does not rotate 360 ​​degrees. Thus, electronic devices can be arranged on the output shaft without fearing that the circuits of the electronic devices will be broken due to the rotation of the rotor.

[0205] Optionally, when the motor is in working state, if the pressure detection device detects that the pressure applied to the output shaft is greater than the pressure threshold, a reminder message can be output. The reminder message is used to remind that the pressure applied to the oral cavity by the cleaning part of the current oral care device exceeds the standard cleaning pressure.

[0206] Optionally, the reminder information may include but is not limited to sound reminder information, frequency conversion reminder information or display reminder information, which is not limited here.

[0207] By implementing the above method, the user can be reminded when the pressure of the oral care device when cleaning the oral cavity is too high, thereby achieving the effect of protecting the user's oral cavity.

[0208] By implementing the methods disclosed in the above embodiments, when the motor is not in a working state, the position of the rotor is limited to the first range by the limiter, so that the user can apply toothpaste accurately on the brush head, thereby improving the user experience; in addition, when the motor is in a working state, the rotor can be controlled to reciprocate within the target range, wherein the target range is within the first range, and the first limit position corresponding to the target range does not coincide with the second limit position corresponding to the first range, thereby avoiding collision between the rotor and the limiter during movement, thereby avoiding damage to the motor and noise caused by the collision; and, when it is determined that the reset condition is met, the rotor can be controlled to reset to the zero position, so that the rotor can start to move from the zero position as the starting point later, and the rotor moves symmetrically relative to the zero position, which can make cleaning more comprehensive. Thorough, thereby ensuring the cleaning effect; and, when it is determined that the current position of the rotor is too close to the limiter, a greater rotation force can be used to quickly rotate the rotor back to the zero position for reset, so as to avoid the collision between the rotor and the limiter as much as possible; and, rotor holding measures can be performed on the rotor to avoid the rotor from deflecting and displacing when it is subjected to a small force; in addition, in the case that the rotor may overcome the holding force and deflect and displace, the oral care device can also continuously detect the rotor position and reset it to the zero position, so that the rotor remains at the zero position; and, when it is detected that the care mode is switched, the rotor is controlled to reduce the movement speed and reset to the zero position to protect the motor; in addition, when switching the care mode, the rotor is reset to the zero position, which is conducive to the complete execution of the next care mode, thereby ensuring the cleaning effect. Moreover, if the execution action is symmetrically arranged relative to the zero position, the cleaning during brushing can be made more comprehensive and thorough, thereby improving the cleaning effect; and the rotor can be driven to reset by the elastic force or magnetic force provided by the reset member, so that the oral care device can reset the rotor to the zero position when it is in a non-awakening state, and then the rotor does not need to be reset when the oral care device is woken up next time; and, when it is determined that the rotor exceeds the first range and is about to collide with the limit member, the power supply module can be controlled to stop supplying power to the motor to stop the rotor from moving, thereby avoiding damage to the motor and noise; and, when the pressure of the oral care device to clean the oral cavity is too high, the user can be reminded, thereby achieving the effect of protecting the user's oral cavity.

[0209] Please refer to Figure 10, which is a schematic diagram of the structure of a control device for an oral care device disclosed in an embodiment of the present application. Optionally, the device can be applied to an oral care device including the electric toothbrush 100 described above; optionally, the oral care device can include a motor and a limiter, the motor including a rotor, and the limiter is used to limit the position of the rotor to a first range when the motor is not in operation. Optionally, the device can include a first control unit 1002, wherein:

[0210] The first control unit 1002 is used to control the rotor to reciprocate within a target range when the motor is in a working state. The target range is within a first range, and the first limit position corresponding to the target range does not overlap with the second limit position corresponding to the first range, so as to avoid the rotor colliding with the limit member during movement.

[0211] By implementing the above-mentioned device, when the motor is not in a working state, the position of the rotor is limited to a first range by the limiter, thereby facilitating the user to accurately apply toothpaste on the brush head and improving the user experience; in addition, when the motor is in a working state, the rotor can be controlled to reciprocate within a target range, wherein the target range is within the first range, and the first limit position corresponding to the target range does not coincide with the second limit position corresponding to the first range, thereby avoiding collision of the rotor with the limiter during movement, thereby avoiding damage to the motor and noise caused by the collision.

[0212] As an optional implementation, the first control unit 1002 is further configured to control the rotor to reciprocate based on a reference position according to the vibration parameter, and to control the rotor to swing based on an initial reference position to change the reference position according to the swing parameter;

[0213] The vibration parameters include the vibration amplitude, the swing parameters include the swing range, and the swing range plus or minus 1 / 2 of the vibration amplitude is less than or equal to the target range.

[0214] By implementing the above device, the oral care device can control the vibration of the rotor while swinging to achieve the effect of sweeping vibration motion, thereby improving the cleaning effect; in addition, the swing range of the rotor can be limited to the target range by adding or subtracting 1 / 2 of the vibration amplitude, thereby limiting the rotor to always be within the first range during the sweeping vibration motion, thereby avoiding collision with the limit member.

[0215] As an optional embodiment, the apparatus shown in FIG10 further includes an adjustment unit (not shown), wherein:

[0216] an adjustment unit, configured to obtain an initial reference position of the rotor currently set before the rotor is controlled to reciprocate within a target range, wherein the initial reference position is used to indicate a deviation angle of the rotor relative to a zero position when the motor is started;

[0217] The swing range and / or vibration amplitude of the rotor is adjusted according to the initial reference position and the first range.

[0218] By implementing the above device, the swing range and / or vibration amplitude of the rotor can be adjusted according to the initial reference position and the first range, thereby improving the flexibility and intelligence of the oral care device.

[0219] As an optional embodiment, the adjustment unit is also used to determine whether the rotor will exceed the first range during movement based on the rotor's currently set initial reference position, swing range and vibration amplitude; and, if it exceeds the first range, adjust the swing range and / or vibration amplitude.

[0220] By implementing the above device, when it is determined that the initial reference position of the rotor deviates, causing the subsequent movement of the rotor to collide with the limiter, the swing range and / or vibration amplitude of the rotor can be adjusted to avoid the subsequent movement of the rotor from colliding with the limiter.

[0221] As an optional embodiment, the swing range includes a first position and a second position, the second limit position corresponding to the first range includes a first sub-limit position and a second sub-limit position, the first position is close to the first sub-limit position, and the second position is close to the second sub-limit position;

[0222] The adjustment unit is further used to determine a third position based on the rotor's currently set initial reference position, first position and 1 / 2 of the vibration amplitude; determine a fourth position based on the rotor's currently set initial reference position, second position and 1 / 2 of the vibration amplitude; if the third position exceeds the first sub-limit position, or the fourth position exceeds the second sub-limit position, it is determined that the rotor will exceed the first range during movement.

[0223] As an optional embodiment, the adjustment unit is also used to reduce the swing range and / or reduce the vibration amplitude according to the position difference; wherein, when the third position exceeds the first sub-limit position, the position difference is the absolute value of the difference between the third position and the first sub-limit position, and when the fourth position exceeds the second sub-limit position, the position difference is the absolute value of the difference between the third position and the first sub-limit position.

[0224] By implementing the above device, when it is determined that the initial reference position of the rotor deviates, causing the subsequent movement of the rotor to collide with the limit member, the swing range and / or vibration amplitude of the rotor can be reduced to avoid the subsequent movement of the rotor from colliding with the limit member.

[0225] As an optional embodiment, the first limit position corresponding to the target range includes a third sub-limit position and a fourth sub-limit position, and the swing range includes a first position and a second position;

[0226] The third sub-limit position is the position obtained by subtracting 1 / 2 of the vibration amplitude from the first position; and the fourth sub-limit position is the position obtained by adding 1 / 2 of the vibration amplitude to the second position.

[0227] By implementing the above device, the relationship between the target range, the swing range and the vibration amplitude can be determined based on the target range, thereby facilitating the subsequent determination of the swing range and vibration amplitude of the rotor based on the target range.

[0228] As an optional implementation manner, the first limit position corresponding to the target range includes a third sub-limit position and a fourth sub-limit position, and the second limit position corresponding to the first range includes a first sub-limit position and a second sub-limit position;

[0229] A difference between the third sub-limit position and the first sub-limit position is greater than or equal to a first threshold, and a difference between the fourth sub-limit position and the second sub-limit position is greater than or equal to a second threshold.

[0230] By implementing the above device, the difference between the first limit position corresponding to the target range and the second limit position corresponding to the first range must be greater than a certain threshold value, so as to leave sufficient buffer space for the rotor, avoid the possibility of collision between the rotor and the limit member as much as possible, and improve safety.

[0231] As an optional implementation manner, the target range has a value range of -60 degrees to 60 degrees, and the first range has a value range of -70 degrees to 70 degrees.

[0232] As an optional embodiment, the oral care device also includes a shell and a mounting bracket, the mounting bracket is installed in the shell, the motor is installed in the mounting bracket, and the motor also includes a stator; wherein, at least one of the stator, the shell and the mounting bracket is provided with a limiting member.

[0233] The implementation of the above device improves the flexibility of setting the limiter and brings convenience to the structural design of the oral care equipment.

[0234] As an optional implementation, the apparatus shown in FIG10 may further include a reset unit (not shown), wherein:

[0235] The reset unit is used to control the rotor to reset to the zero position when the reset conditions are met; when a start command is received, the rotor is controlled to start moving with the zero position as the starting point.

[0236] By implementing the above device, the rotor can be controlled to reset to the zero position when it is determined that the reset conditions are met, so that the rotor can subsequently start moving from the zero position as the starting point. The symmetrical movement of the rotor relative to the zero position can make cleaning more comprehensive and thorough, thereby ensuring the cleaning effect.

[0237] As an optional embodiment, the reset unit is also used to determine the first distance between the current position of the rotor and the limit member when the reset condition is met; determine the first rotation force based on the first distance, and the first rotation force is negatively correlated with the first distance; and control the rotor to reset to the zero position according to the first rotation force.

[0238] By implementing the above device, when it is determined that the current position of the rotor is too close to the limiter, a greater rotation force can be used to quickly rotate the rotor back to the zero position for reset, thereby avoiding collision between the rotor and the limiter as much as possible.

[0239] As an optional implementation, the apparatus shown in FIG10 may further include a second control unit (not shown), wherein:

[0240] The second control unit is used to control the power supply module to continuously provide power to the motor after controlling the rotor to reset to the zero position, so that the rotor generates a holding force, and the holding force is used to keep the position of the rotor at the zero position; and / or, detect whether the rotor deviates from the zero position, and if it is detected that the rotor deviates from the zero position, control the rotor to reset to the zero position again.

[0241] By implementing the above-mentioned device, rotor holding measures can be taken for the rotor to avoid the rotor from deflecting and displacing when subjected to a small force; in addition, in the event that the rotor may overcome the holding force and deflect and displace, the oral care device can also continuously detect the rotor position and reset it to the zero position to keep the rotor at the zero position.

[0242] As an optional embodiment, the second control unit is also used to obtain the holding state of the oral care device before controlling the power supply module to continuously supply power to the motor; and, if the oral care device is in the held state, control the power supply module to continuously supply power to the motor so that the rotor generates a holding force, and the holding force is used to keep the position of the rotor at the zero position; and / or, detect whether the rotor deviates from the zero position, and if it is detected that the rotor deviates from the zero position, control the rotor to reset to the zero position.

[0243] By implementing the above-mentioned device, in order to avoid the rotor deviating from the zero position after cleaning the brush head, the oral care device can continuously perform rotor protection measures to keep the rotor at the zero position; in addition, if the oral care device is in a held state, it means that the user is using the oral care device, so the rotor holding measures can be performed; if the oral care device is not in a held state, it means that the user is not currently using the oral care device, and the rotor holding measures may not be performed to save power consumption of the oral care device.

[0244] As an optional embodiment, the reset condition includes: when the oral care device is in the awake state, detecting that the rotor is not at the zero position; or, the oral care device is in the pause state; or, the working time of the oral care device reaches a first time length.

[0245] As an optional implementation, the apparatus shown in FIG10 may further include a third control unit (not shown), wherein:

[0246] The third control unit is used to control the rotor to reduce the movement speed and reset to the zero position after it controls the rotor to move within the target range if it detects that the care mode of the oral care device has been switched; when the rotor is reset to the zero position, the control rotor takes the zero position as the starting point and starts moving in the movement manner indicated by the switched care mode.

[0247] When the device detects a change in care mode, it controls the rotor to slow down and return to zero, protecting the motor. Furthermore, when switching care modes, the rotor resets to zero, facilitating the complete execution of the next care mode and ensuring effective cleaning. Furthermore, if the execution motions are arranged symmetrically relative to the zero position, brushing can be more comprehensive and thorough, improving cleaning effectiveness.

[0248] As an optional embodiment, the oral care device further includes a reset member, which is used to reset the rotor to a zero position when the oral care device is in a non-awakening state.

[0249] By implementing the above device, the rotor can be driven to reset through the elastic force or magnetic force provided by the reset member, so that the oral care device can reset the rotor to the zero position when it is in a non-awakening state, and the rotor does not need to be reset when the oral care device is awakened next time.

[0250] As an optional embodiment, the apparatus shown in FIG10 may further include a power supply unit (not shown), wherein:

[0251] The power supply unit is used to control the power supply module to stop supplying power to the motor if the position of the rotor exceeds a first range when the oral care device is in an awake state.

[0252] By implementing the above device, when it is determined that the rotor exceeds the first range and will collide with the limit member, the power supply module can be controlled to stop supplying power to the motor, so that the rotor stops moving, thereby avoiding damage to the motor and noise.

[0253] As an optional embodiment, the rotor includes an output shaft, on which an electronic device is provided, and the electronic device includes a pressure detection device; the device shown in FIG10 may further include a reminder unit (not shown), wherein:

[0254] The reminder unit is used to output a reminder message when the motor is in working state and if the pressure detection device detects that the pressure applied to the output shaft is greater than the pressure threshold, the reminder message is used to remind that the pressure applied to the oral cavity by the cleaning part of the current oral care device exceeds the standard cleaning pressure.

[0255] By implementing the above device, the user can be reminded when the pressure of the oral care device when cleaning the oral cavity is too high, thereby achieving the effect of protecting the user's oral cavity.

[0256] Please refer to Figure 11, which is a schematic diagram of the structure of an oral care device disclosed in an embodiment of the present application. As shown in Figure 11, the oral care device may include:

[0257] A memory 1101 storing executable program code;

[0258] a processor 1102 coupled to the memory 1101;

[0259] The processor 1102 calls the executable program code stored in the memory 1101 to execute the control method of the oral care device disclosed in the above embodiments.

[0260] An embodiment of the present application discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute the control method of the oral care device disclosed in the above embodiments.

[0261] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0262] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An electric toothbrush, characterized in that: include: handle shell; A mounting bracket is provided in the handle shell; a drive motor comprising a stator assembly and a rotor assembly, wherein the stator assembly is disposed within the mounting bracket and surrounds the rotor assembly, the rotor assembly being rotatable relative to the stator assembly, the rotor assembly comprising an output shaft, a portion of the output shaft extending out of the handle housing to connect to the brush head; In which, the rotor assembly is provided with a first limit member, and at least one of the stator assembly, the mounting bracket and the handle shell is provided with a second limit member, and the first limit member and the second limit member cooperate to limit the rotation angle range of the rotor assembly relative to the stator assembly.

2. The electric toothbrush according to claim 1, wherein The output shaft includes a protruding section, the protruding section is located outside the stator assembly, and a portion of the protruding section extends out of the handle shell to be connected to the brush head; The electric toothbrush is constructed in at least one of the following ways: The portion of the protruding section located inside the mounting bracket is provided with the first limiting member, and the inner wall of the mounting bracket is provided with the second limiting member; The portion of the extended section located outside the mounting bracket is provided with the first limiting member, and the inner wall of the handle shell is provided with the second limiting member; The extending section is provided with the first limiting member, and the stator assembly is provided with the second limiting member at one end close to the brush head.

3. The electric toothbrush according to claim 1, wherein One of the first limiting member and the second limiting member is configured as a limiting protrusion and the other is configured as a limiting groove. The limiting groove extends along the circumference of the output shaft, and the limiting protrusion is located in the limiting groove.

4. The electric toothbrush according to claim 3, wherein When the second limiting member is constructed as the limiting groove and is provided on the mounting bracket, the mounting bracket includes a first bracket and a second bracket, the first bracket and the second bracket are respectively provided on radially opposite sides of the output shaft, and the first bracket and the second bracket are detachably connected.

5. The electric toothbrush according to claim 3, characterized in that In the case where the second limiting member is configured as the limiting groove and is provided on the handle shell, the handle shell is an integrated structure; Wherein, the limiting groove is open on the side facing away from the brush head, or the handle shell is further provided with a guide groove, which is connected to the side of the limiting groove facing away from the brush head and extends along the axial direction of the output shaft.

6. The electric toothbrush according to claim 1, wherein The stator assembly includes a housing and a stator core, wherein the stator core is arranged in the housing; The rotor assembly further includes a rotor core, the rotor core is sleeved on the output shaft and rotates synchronously with the output shaft, and the stator core is sleeved on the rotor core; Wherein, one of the stator core and the rotor core is provided with a winding and the other is provided with a permanent magnet.

7. The electric toothbrush according to claim 6, characterized in that The rotor core is provided with the first limiting member, and at least one of the stator core and the casing is provided with the second limiting member; Wherein, the first limiting member is located on a side of the driving motor facing the brush head, and the conducting wire of the winding is located on a side of the driving motor facing away from the brush head.

8. The electric toothbrush according to claim 6, characterized in that The rotor assembly further comprises: a mounting seat, sleeved on the output shaft and located on a side of the stator assembly facing away from the brush head, and the first limiting member is located on a side of the stator assembly facing the brush head; A position detection component is provided on a side of the mounting base facing away from the brush head and is used for detecting the position of the output shaft relative to the stator assembly.

9. The electric toothbrush according to claim 6, characterized in that The rotor assembly further comprises: a mounting seat, sleeved on the output shaft and located on the side of the stator assembly facing away from the brush head, the outer circumferential surface of the mounting seat being provided with the first limiter, the stator assembly comprising an end cover, an end of the housing facing away from the brush head being provided with an open opening, the end cover being connected to the housing for sealing the open opening, and a side of the end cover facing away from the brush head being provided with the second limiter; A position detection component is provided on a side of the mounting base facing away from the brush head and is used for detecting the position of the output shaft relative to the stator assembly.

10. The electric toothbrush according to claim 1, wherein Also includes: a first sealing member, provided between the output shaft and the mounting bracket, and / or between the output shaft and the handle housing; Wherein, the first limiting member is located on a side of the first sealing member facing away from the brush head.

11. The electric toothbrush according to claim 1, wherein Also includes: The second sealing member is provided between the handle shell and the mounting bracket. The second sealing member is closer to the brush head relative to the mounting bracket. The first limiting member does not exceed one end of the mounting bracket toward the brush head.

12. The electric toothbrush according to claim 1, wherein Also includes: The buffer member is arranged between the first limit member and the second limit member in the circumferential direction of the output shaft. When the first limit member and the second limit member are close to each other, the buffer member is used to buffer and absorb the force between the first limit member and the second limit member.

13. The electric toothbrush according to claim 1, wherein The first limiting member is an elastic member, the output shaft is provided with a socket, and the first limiting member is inserted into the socket.

14. The electric toothbrush according to claim 1, wherein Also includes: A force detection member, provided on the output shaft, for detecting the force condition of the output shaft; The circuit board is connected to the force detection component through a flexible electrical connector.

15. The electric toothbrush according to claim 14, characterized in that Also includes: a first sealing member, provided between the output shaft and the mounting bracket, and / or between the output shaft and the handle housing; Wherein, the force detection component is located on a side of the first sealing component facing away from the brush head.

16. The electric toothbrush according to claim 14, wherein The force detection member and the first limit member are located on opposite sides of the stator assembly; and / or One of the force detecting member and the first limiting member is disposed inside the housing of the stator assembly, and the other is disposed outside the housing.

17. The electric toothbrush according to claim 14, wherein The circuit board is provided with a first electrical connection position, and the first electrical connection position is located between the center of the stator assembly and the force detection member in the axial direction of the output shaft.

18. The electric toothbrush according to claim 1, wherein Also includes: A circuit board is provided with a first electrical connection position and a second electrical connection position, wherein the first electrical connection position is closer to the brush head than the second electrical connection position; a force detection member, provided on a side of the stator assembly facing the brush head and connected to the first electrical connection point, for detecting a force condition of the output shaft; A position detection component is provided on a side of the stator assembly facing away from the brush head and is connected to the second electrical connection point, and is used for detecting the position of the output shaft relative to the stator assembly.

19. The electric toothbrush according to claim 18, wherein The first electrical connection position is closer to the brush head than the position detection component.

20. The electric toothbrush according to any one of claims 1 to 19, characterized in that Also includes: A reset member, wherein the rotor assembly is connected to one end of the reset member, and at least one of the handle shell, the mounting bracket and the stator assembly is connected to the other end of the reset member, and the reset member has a reset force to reset the rotor assembly to an initial angle.

21. The electric toothbrush according to any one of claims 1 to 19, characterized in that The rotation angle range of the rotor assembly relative to the stator assembly is 15° to 60°.

22. The electric toothbrush according to any one of claims 1 to 19, characterized in that The drive motor is configured as a servo motor.

23. A method for controlling an oral care device, characterized in that: The oral care device includes a motor, the motor includes a rotor, and the oral care device further includes a limiter, the limiter is used to limit the position of the rotor to a first range when the motor is not in a working state; the method includes: When the motor is in working state, the rotor is controlled to reciprocate within a target range, the target range is within the first range, and the first limit position corresponding to the target range does not overlap with the second limit position corresponding to the first range, so as to avoid the rotor colliding with the limit member during movement.

24. The method according to claim 23, wherein The controlling the rotor to reciprocate within a target range includes: controlling the rotor to reciprocate based on a reference position according to a vibration parameter, and controlling the rotor to swing based on an initial reference position to change the reference position according to a swing parameter; The vibration parameter includes a vibration amplitude, the swing parameter includes a swing range, and the swing range plus or minus 1 / 2 of the vibration amplitude is less than or equal to the target range.

25. The method according to claim 23, characterized in that Before controlling the rotor to reciprocate within the target range, the method further includes: Acquire an initial reference position of the rotor currently set, where the initial reference position is used to represent a deviation angle of the rotor relative to a zero position when the motor is started; The swing range and / or vibration amplitude of the rotor is adjusted according to the initial reference position and the first range.

26. The method according to claim 25, characterized in that The adjusting the swing range and / or vibration amplitude of the rotor according to the initial reference position and the first range includes: determining, according to a currently set initial reference position of the rotor, the swing range, and the vibration amplitude, whether the rotor will exceed the first range during movement; If the first range is exceeded, the swing range and / or vibration amplitude is adjusted.

27. The method according to claim 26, characterized in that The swing range includes a first position and a second position, the second limit position corresponding to the first range includes a first sub-limit position and a second sub-limit position, the first position is close to the first sub-limit position, and the second position is close to the second sub-limit position; The determining, based on the currently set initial reference position of the rotor, the swing range, and the vibration amplitude, whether the rotor will exceed the first range during the movement includes: determining a third position according to a currently set initial reference position of the rotor, the first position, and 1 / 2 of the vibration amplitude; determining a fourth position according to a currently set initial reference position of the rotor, the second position, and 1 / 2 of the vibration amplitude; If the third position exceeds the first sub-limit position, or the fourth position exceeds the second sub-limit position, it is determined that the rotor will exceed the first range during movement.

28. The method according to claim 27, characterized in that The adjusting of the swing range and / or vibration amplitude includes: The swing range is reduced and / or the vibration amplitude is reduced according to the position difference; wherein, when the third position exceeds the first sub-limit position, the position difference is the absolute value of the difference between the third position and the first sub-limit position; and when the fourth position exceeds the second sub-limit position, the position difference is the absolute value of the difference between the third position and the first sub-limit position.

29. The method according to any one of claims 24 to 28, characterized in that The first limit position corresponding to the target range includes a third sub-limit position and a fourth sub-limit position, and the swing range includes a first position and a second position; The third sub-limit position is the position obtained by subtracting 1 / 2 of the vibration amplitude from the first position; and the fourth sub-limit position is the position obtained by adding 1 / 2 of the vibration amplitude to the second position.

30. The method according to any one of claims 23 to 28, characterized in that: The first limit position corresponding to the target range includes a third sub-limit position and a fourth sub-limit position, and the second limit position corresponding to the first range includes a first sub-limit position and a second sub-limit position; A difference between the third sub-limit position and the first sub-limit position is greater than or equal to a first threshold, and a difference between the fourth sub-limit position and the second sub-limit position is greater than or equal to a second threshold.

31. The method according to any one of claims 23 to 28, wherein: The target range is between -60 degrees and 60 degrees, and the first range is between -70 degrees and 70 degrees.

32. The method according to any one of claims 23 to 28, wherein: The oral care device further includes a shell and a mounting bracket, the mounting bracket is installed in the shell, the motor is installed in the mounting bracket, and the motor further includes a stator; wherein at least one of the stator, the shell and the mounting bracket is provided with the limiting member.

33. The method according to claim 23, wherein The method further comprises: When a reset condition is met, controlling the rotor to reset to a zero position; When a start instruction is received, the rotor is controlled to start moving with the zero position as the starting point.

34. The method according to claim 33, wherein When the reset condition is met, controlling the rotor to reset to the zero position includes: When a reset condition is met, determining a first distance between the current position of the rotor and the limiting member; determining a first rotation force according to the first distance, wherein the first rotation force is negatively correlated with the first distance; According to the first rotation force, the rotor is controlled to reset to a zero position.

35. The method according to claim 33, wherein After controlling the rotor to reset to the zero position, the method further includes: Controlling the power supply module to continuously supply power to the motor so that the rotor generates a holding force, wherein the holding force is used to keep the position of the rotor at the zero position; And / or, detecting whether the rotor deviates from the zero position, and if it is detected that the rotor deviates from the zero position, controlling the rotor to reset to the zero position.

36. The method according to claim 35, characterized in that Before the controlling power supply module continues to provide power to the motor, the method further includes: obtaining a holding state of the oral care device; If the oral care device is in a held state, the step of controlling the power supply module to continuously supply power to the motor is executed, and / or the step of detecting whether the rotor deviates from the zero position is executed.

37. The method according to any one of claims 33 to 36, characterized in that The reset conditions include: When the oral care device is in an awake state, detecting that the rotor is not in a zero position; Alternatively, the oral care device is in a paused state; Alternatively, the operating time of the oral care device reaches a first time period.

38. The method according to claim 23, wherein After controlling the rotor to move within the target range, the method further includes: If it is detected that the care mode of the oral care device is switched, controlling the rotor to reduce the movement speed and reset to the zero position; When the rotor is reset to the zero position, the rotor is controlled to start moving with the zero position as the starting point according to the movement mode indicated by the switched nursing mode.

39. The method according to claim 23, wherein The oral care device further includes a reset element, which is used to reset the rotor to a zero position when the oral care device is in a non-awakening state.

40. The method according to claim 23, wherein The method further comprises: When the oral care device is in the awake state, if the position of the rotor exceeds the first range, the power supply module is controlled to stop supplying power to the motor.

41. The method according to claim 23, wherein The rotor includes an output shaft, the output shaft is provided with an electronic device, and the electronic device includes a pressure detection device; the method further includes: When the motor is in working state, if the pressure detection device detects that the pressure applied to the output shaft is greater than the pressure threshold, a reminder message is output, which is used to remind that the pressure applied to the oral cavity by the cleaning part of the current oral care device exceeds the standard cleaning pressure.

42. A control device for an oral care device, characterized in that: The oral care device includes a motor, the motor includes a rotor, and the oral care device further includes a limiter, the limiter is used to limit the rotor to a first range when the motor is not in a working state; the device includes: A first control unit is used to control the rotor to reciprocate within a target range when the motor is in a working state, the target range is within the first range, and the first limit position corresponding to the target range does not overlap with the second limit position corresponding to the first range, so as to avoid the rotor colliding with the limit member during movement.

43. An oral care device, characterized in that It comprises a memory storing executable program code and a processor coupled to the memory; wherein the processor calls the executable program code stored in the memory to execute the method according to any one of claims 23 to 41.

44. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 23 to 41 is implemented.

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