Electric toothbrush

Abstract

The utility model discloses an electric toothbrush, which comprises a handle shell; the mounting bracket is arranged in the handle shell; the driving motor comprises 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, and a part of the output shaft extends out of the handle shell to be connected with a brush head; wherein the rotor assembly is provided with a first limiting piece, at least one of the stator assembly, the installation support and the handle shell is provided with a second limiting piece, and the first limiting piece is matched with the second limiting piece so as to limit the rotation angle range of the rotor assembly relative to the stator assembly. The rotation range of the rotor assembly of the electric toothbrush is limited, toothpaste can be smeared to the brush head more easily, and the use experience is good.

Description

Technical Field

[0001] The present application relates to the technical field of oral cleaning equipment, and in particular to an electric toothbrush. Background Art

[0002] 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 positions of the brush head, affecting the user experience. Utility Model Content

[0003] The purpose of the present application is to provide an electric toothbrush, the rotation range of the rotor assembly of the electric toothbrush is limited, the toothpaste is easier to apply to the brush head, and the user experience is good.

[0004] In order to achieve the above-mentioned object, an embodiment of the present application provides an electric toothbrush, comprising: a handle shell;

[0005] A mounting bracket is arranged in the handle shell; a 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.

[0006] 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 be connected to 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.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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, 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.

[0011] 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 wire of the winding is located on the side of the drive motor facing away from the brush head.

[0012] In some embodiments of the present application, the rotor assembly also 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 limit member is located on the side of the stator assembly facing the brush head; a position detection member, which is located 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.

[0013] In some embodiments of the present application, the rotor assembly also 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 casing facing away from the brush head is provided with an open opening, the end cover is connected to the casing 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, and is used to detect the position of the output shaft relative to the stator assembly.

[0014] In some embodiments of the present application, the electric toothbrush further includes: a first seal, disposed between the output shaft and the mounting bracket, and / or between the output shaft and the handle shell; wherein the first limit member is located on the side of the first seal facing away from the brush head.

[0015] In some embodiments of the present application, the electric toothbrush also 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 limit member not exceeding one end of the mounting bracket toward the brush head.

[0016] 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.

[0017] 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.

[0018] In some embodiments of the present application, the electric toothbrush further includes: a force detection component, which is arranged on the output shaft and is used to detect the force condition of the output shaft; and a circuit board, which is connected to the force detection component via a flexible electrical connector.

[0019] In some embodiments of the present application, the electric toothbrush further includes: a first sealing member, disposed between the output shaft and the mounting bracket, and / or between the output shaft and the handle shell; wherein the force detection member is located on a side of the first sealing member facing away from the brush head.

[0020] 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 disposed inside the housing of the stator assembly and the other is disposed outside the housing.

[0021] In some embodiments of the present application, the circuit board is provided with a first electrical connection position, and the first electrical connection position is located between the axial center of the stator assembly and the force detection member in the axial direction of the output shaft.

[0022] In some embodiments of the present application, the electric toothbrush also includes: a circuit board, having a first electrical connection position and a second electrical connection position, the first electrical connection position being closer to the brush head than the second electrical connection position; a force detection component, disposed 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, disposed 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.

[0023] In some embodiments of the present application, the first electrical connection position is closer to the brush head than the position detection member.

[0024] 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.

[0025] In some embodiments of the present application, the rotation angle range of the rotor assembly relative to the stator assembly is 15° to 60°.

[0026] In some embodiments of the present application, the drive motor is configured as a servo motor.

[0027] 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 setting the first limit member and the 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present 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.

[0029] Figure 1 A schematic diagram of the structure of an electric toothbrush according to an embodiment of the present application;

[0030] Figure 2 An exploded view of an electric toothbrush according to an embodiment of the present application;

[0031] Figure 3 One of the cross-sectional views of the driving motor and the mounting bracket of the electric toothbrush according to the embodiment of the present application;

[0032] Figure 4 The second cross-sectional view of the driving motor and the mounting bracket of the electric toothbrush according to the embodiment of the present application;

[0033] Figure 5 A schematic diagram of the coordination of the first bracket and the mounting bracket of the electric toothbrush according to an embodiment of the present application;

[0034] Figure 6 A schematic diagram of the cooperation between the second bracket and the mounting bracket of the electric toothbrush according to an embodiment of the present application;

[0035] Figure 7 This is one of the structural schematic diagrams of the driving motor of the electric toothbrush according to an embodiment of the present application;

[0036] Figure 8 This is a second structural schematic diagram of a driving motor of an electric toothbrush according to an embodiment of the present application;

[0037] Fig. 9 A cross-sectional view of a driving motor of an electric toothbrush according to an embodiment of the present application;

[0038] Fig.10 This is a cross-sectional view of a driving motor, a mounting bracket, a first seal, and a second seal of an electric toothbrush according to an embodiment of the present application.

[0039] Description of Figure Numbers:

[0040] Electric toothbrush 1;

[0041] Handle shell 100; brush head 110;

[0042] Mounting bracket 200; first bracket 210; second bracket 220;

[0043] Driving motor 300; stator assembly 310; second stopper 311; housing 312; winding 3131; end cover 314; rotor assembly 320; output shaft 321; extension section 3211; plug hole 3212; first stopper 322; rotor core 323; permanent magnet 3231; mounting seat 324; position detection member 325;

[0044] A first sealing member 400 ; a second sealing member 500 ; a circuit board 800 ; and a reset member 900 . DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0046] When the following description refers to the 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 only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0047] In the description of the present 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 the present application can be understood according to the specific circumstances. In addition, in the description of the present 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 objects associated before and after are in an "or" relationship.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0049] The electric toothbrush 1 according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0050] like Figure 1-Figure 4 As shown, the electric toothbrush 1 of the embodiment of the present application includes a handle shell 100, a mounting bracket 200 and a driving motor 300.

[0051] The mounting bracket 200 is disposed in the handle shell 100, and the driving motor 300 includes a stator assembly 310 and a rotor assembly 320. The stator assembly 310 is disposed in the mounting bracket 200 and surrounds the rotor assembly 320. The rotor assembly 320 is rotatable relative to the stator assembly 310. The rotor assembly 320 includes an output shaft 321, and a portion of the output shaft 321 extends out of the handle shell 100 to be connected to the brush head 110.

[0052] Among them, the rotor assembly 320 is provided with a first limit member 322, and at least one of the stator assembly 310, the mounting bracket 200 and the handle shell 100 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 320 relative to the stator assembly 310.

[0053] That is to say, the stator assembly 310 is provided with a second limit member 311, or the mounting bracket 200 is provided with a second limit member 311, or the handle shell 100 is provided with a second limit member 311, or both the stator assembly 310 and the mounting bracket 200 are provided with a second limit member 311, or both the mounting bracket 200 and the handle shell 100 are provided with a second limit member 311, or both the stator assembly 310 and the handle shell 100 are provided with a second limit member 311, or the stator assembly 310, the mounting bracket 200 and the handle shell 100 are all provided with a second limit member 311.

[0054] Specifically, the mounting bracket 200 can be connected to the handle shell 100 to fix the relative positions of the handle shell 100 , the mounting bracket 200 , and the stator assembly 310 , and the handle shell 100 can protect the mounting bracket 200 and the drive motor 300 .

[0055] Furthermore, when the rotor assembly 320 rotates relative to the stator assembly 310, the output shaft 310 drives the brush head 110 to rotate relative to the handle housing 100 to achieve cleaning of the oral cavity, and the brush head 110 can clean the teeth.

[0056] By setting the first limit member 322 and the second limit member 311, the rotation angle range of the rotor assembly 320 relative to the stator assembly 310 can be limited, so the rotation angle range of the brush head 110 relative to the stator assembly 310 is also limited, and thus the rotation angle range of the brush head 110 relative to the handle shell 100 is also limited. When squeezing toothpaste onto the brush head 110, even if the brush head 110 rotates, it is not easy to cause the toothpaste to fall off the brush head 110 or smear the toothpaste to other positions, and the user experience is good.

[0057] like Figure 2-Figure 6 and Fig.10 As shown, the output shaft 321 includes an extension section 3211, which is located outside the stator assembly 310. A portion of the extension section 3211 extends out of the handle shell 100 to connect with the brush head 110. The portion of the extension section 3211 located in the mounting bracket 200 is provided with a first limit member 322, and the inner wall of the mounting bracket 200 is provided with a second limit member 311.

[0058] During the assembly of the electric toothbrush 1, the driving motor 300 and the mounting bracket 200 are firstly assembled as one body, and then the driving motor 300 and the mounting bracket 200 are integrally installed in the handle shell 100; during the disassembly of the electric toothbrush 1, the driving motor 300 and the mounting bracket 200 are integrally taken out of the handle shell 100, and then the driving motor 300 and the mounting bracket 200 are separated. Since the first stopper 322 and the second stopper 311 are located in the mounting bracket 200, that is, the first stopper 322 and the second stopper 311 will not be exposed from the mounting bracket 200, the first stopper 322 and the second stopper 311 will not interfere with the inner wall of the handle shell 100, which is conducive to the assembly and disassembly of the electric toothbrush 1.

[0059] The output shaft 321 includes an extension section 3211, which is located outside the stator assembly 310. A portion of the extension section 3211 extends out of the handle shell 100 to connect with the brush head 110. The portion of the extension section 3211 located outside the mounting bracket 200 is provided with a first stopper 322, and the inner wall of the handle shell 100 is provided with a second stopper 311. Since the first stopper 322 and the second stopper 311 are located inside the handle shell 100, that is, the first stopper 322 and the second stopper 311 will not be exposed from the handle shell 100, the user will not touch the first stopper 322 and the second stopper 311 under normal circumstances, nor will he see the first stopper 322 and the second stopper 311, and the surface of the electric toothbrush 1 is smoother, the appearance is more neat, and the user experience is better.

[0060] The output shaft 321 includes an extension section 3211, which is located outside the stator assembly 310. A part of the extension section 3211 extends out of the handle shell 100 to connect with the brush head 110. The extension section 3211 is provided with a first stopper 322, and the end of the stator assembly 310 close to the brush head 110 is provided with a second stopper 311. In this way, the output shaft 321 is limited by the stator assembly 310, and the first stopper 322 and the second stopper 311 are both located outside the housing 310 of the stator assembly 310, so as to avoid interference with the internal structure of the housing 310 of the stator assembly 310 (such as the winding 3131, the lead wire of the winding 3131 for electrical connection with the outside of the stator assembly 310, the permanent magnet 3231 and the stator core, etc.), thereby not affecting the internal layout of the housing 310, and ensuring the working reliability of the drive motor 300.

[0061] like Figure 4-Figure 6As shown, one of the first limiting member 322 and the second limiting member 311 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 321, and the limiting protrusion is located in the limiting groove. By inserting the limiting protrusion into the limiting groove, on one hand, the inner walls of the limiting groove on both sides of the circumference of the output shaft 321 can limit the limiting protrusion, thereby limiting the rotation angle range of the rotor assembly 320 relative to the stator assembly 310, and on the other hand, during the assembly process of the electric toothbrush 1, the cooperation of the limiting protrusion and the limiting groove can achieve a pre-positioning effect, thereby improving assembly efficiency and assembly accuracy.

[0062] like Figure 4-Figure 6 As shown, in the case where the second limiting member 311 is configured as a limiting groove and is disposed on the mounting bracket 200, the mounting bracket 200 includes a first bracket 210 and a second bracket 220, which are disposed on two radially opposite sides of the output shaft 321, and the first bracket 210 and the second bracket 220 are detachably connected. The limiting groove is disposed on the inner wall of the first bracket 210, or the limiting groove is disposed on the inner wall of the second bracket 220, or a part of the limiting groove is disposed on the inner wall of the first bracket 210, and another part of the limiting groove is disposed on the inner wall of the second bracket 220, and the limiting groove forms an integral groove when the first bracket 210 and the second bracket 220 are connected.

[0063] By setting the first bracket 210 and the second bracket 220 separately, it is convenient to install the drive motor 300 into the installation bracket 200. The first bracket 210 and the second bracket 220 can be separated at a later time to replace, repair and inspect the drive motor 300. 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.

[0064] When the second stopper 311 is configured as a stopper groove and is disposed on the handle shell 100, the handle shell 100 is an integrated structure, and the outer surface of the handle shell 100 has no gaps, is smoother, has a better gripping experience, and optimizes the visual perception. Typically, the top of the handle shell 100 is used to mount the brush head 110, and the drive motor 300 is mounted from the bottom of the handle shell 100 into the handle shell 100, and the drive motor 300 in the handle shell 100 is also taken out from the bottom of the handle shell 100.

[0065] Among them, the side of the limiting groove facing away from the brush head 110 is open, so that when the driving motor 300 and the handle shell 100 are assembled and disassembled, the limiting protrusion and the side wall of the limiting groove facing away from the brush head 110 will not interfere with each other, which facilitates the disassembly and assembly of the driving motor 300.

[0066] Alternatively, the handle shell 100 is further provided with a guide groove, which is connected to the side of the limit groove facing away from the brush head 110 and extends along the axial direction of the output shaft 321. When the drive motor 300 and the handle shell 100 are assembled, the limit protrusion moves along the guide groove to the limit groove, and when the drive motor 300 and the handle shell 100 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 300.

[0067] like Figure 7-Figure 9 As shown, the stator assembly 310 includes a housing 312 and a stator core, the stator core is disposed in the housing 312, and the rotor assembly 320 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, and the stator core is sleeved on the rotor core 323. Among them, 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.

[0068] 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 will not change, thereby reducing the influence of the rotation of the rotor core 323 on the routing of the winding 3131;

[0069] 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 first limit member 322 and the second limit member 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 set on the rotor core 323, and the arrangement of the drive motor 300 is more diverse, so that the drive motor 300 is suitable for different usage requirements, thereby improving the layout flexibility of the drive motor 300.

[0070] 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. In this way, the driving motor 300 can limit the rotation angle of the rotor assembly 320 only by its own structure, without adjusting the structure of the mounting bracket 200 and the handle housing 100. The electric toothbrush 1 can use the existing mounting bracket 200 and the handle housing 100, and the production and processing of the electric toothbrush 1 is simpler.

[0071] The first stopper 322 is located on the side of the driving motor 300 facing the brush head 110, and the wire of the winding 3131 is located on the side of the driving motor 300 facing away from the brush head 110. In this way, the distance between the first stopper 322 and the wire of the winding 3131 is large, which can avoid interference between the first stopper 322 and the wire of the winding 3131 when the rotor assembly 320 rotates, improve the electrical connection reliability of the winding 3131, and ensure the circuit safety of the driving motor 300.

[0072] For example, the first limit member 322 can be a limit protrusion, and the second limit member 311 can be a limit groove, and the limit protrusion is inserted into the limit groove; or the second limit member 311 can also be a limit protrusion, and during the rotation of the rotating assembly relative to the stator assembly 310, the first limit member 322 and the second limit member 311 can stop each other, wherein there can be two first limit members 322, and the second limit member 311 is located between the two first limit members 322 in the circumferential direction of the output shaft 321, or there can be two second limit members 311, and the first limit member 322 is located between the two second limit members 311 in the circumferential direction of the output shaft 321.

[0073] The rotor assembly 320 further includes a mounting seat 324 and a position detection member 325. The mounting seat 324 is sleeved on the output shaft 321 and is located on the side of the stator assembly 310 facing away from the brush head 110. The first stop member 322 is located on the side of the stator assembly 310 facing the brush head 110. The position detection member 325 is disposed on the side of the mounting seat 324 facing away from the brush head 110, and is used to detect the position of the output shaft 321 relative to the stator assembly 310. The position detection member 325 may be a Hall sensor, an angle sensor, etc.

[0074] For example, the position detection component 325 can be connected to the circuit board 800 to feed back the relative position between the rotor assembly 320 and the stator assembly 310 to the circuit board 800. The circuit board 800 can control the operation of the drive motor 300 based on the feedback result and determine whether the drive motor 300 is operating normally.

[0075] In this way, the position detection member 325 and the first limit member 322 are arranged on opposite sides of the stator assembly 310, 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 320 rotates relative to the stator assembly 310, 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 300.

[0076] like Figure 8As shown, the rotor assembly 320 further includes a mounting seat 324 and a position detection member 325. The mounting seat 324 is sleeved on the output shaft 321 and is located on the side of the stator assembly 310 facing away from the brush head 110. The outer peripheral surface of the mounting seat 324 is provided with a first stopper 322. The stator assembly 310 includes an end cover 314. The end of the housing 312 facing away from the brush head 110 is provided with an open opening. The end cover 314 is connected to the housing 312. The end cover 314 is used to cover the open opening. The side of the end cover 314 facing away from the brush head 110 is provided with a second stopper 311. The position detection member 325 is provided on the side of the mounting seat 324 facing away from the brush head 110. The position detection member 325 is used to detect the position of the output shaft 321 relative to the stator assembly 310. Among them, the position detection member 325 can be a Hall sensor, an angle sensor, etc.

[0077] For example, the position detection component 325 can be connected to the circuit board 800 to feed back the relative position between the rotor assembly 320 and the stator assembly 310 to the circuit board 800. The circuit board 800 can control the operation of the drive motor 300 based on the feedback result and determine whether the drive motor 300 is operating normally.

[0078] Furthermore, the stator core and the rotor assembly 320 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 320 and the housing 312 in the axial direction of the output shaft 321 .

[0079] In this way, the first limit member 322 is integrated into the mounting base 324, which reduces the number of parts and the axial size of the drive motor 300, and the second limit member 311 is constructed on the side of the end cover 314 facing away from the brush head 110. 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.

[0080] like Fig.10 As shown, the electric toothbrush 1 further includes a first seal 400, which is disposed between the output shaft 321 and the mounting bracket 200, or between the output shaft 321 and the handle shell 100, or between the output shaft 321 and the mounting bracket 200, and between the output shaft 321 and the handle shell 100. By providing the first seal 400, liquid can be prevented from flowing into the mounting bracket 200, thereby improving the sealing performance of the electric toothbrush 1, wherein the first seal 400 can be a soft plastic part, such as made of rubber or other materials.

[0081] The first stopper 322 is located on the side of the first seal 400 facing away from the brush head 110. In this way, the first seal 400 can also prevent the liquid from flowing to the first stopper 322, reduce the probability of corrosion and short circuit of the first stopper 322, and improve circuit safety.

[0082] like Fig.10 As shown, the electric toothbrush 1 further includes a second seal 500, which is disposed between the handle shell 100 and the mounting bracket 200. The second seal 500 is closer to the brush head 110 relative to the mounting bracket 200, and the first limit member 322 does not exceed the end of the mounting bracket 200 facing the brush head 110.

[0083] By providing the second sealing member 500 , liquid can be prevented from flowing into between the mounting bracket 200 and the handle shell 100 , thereby improving the sealing performance of the electric toothbrush 1 , wherein the second sealing member 500 may be a soft plastic member, such as made of rubber or other materials.

[0084] In addition, since the first limit member 322 is located in the mounting bracket 200, the first limit member 322 and the second seal 500 can be prevented from contacting each other, thereby preventing the first limit member 322 from scratching the second seal 500 during the rotation of the rotating assembly, thereby ensuring the service life and sealing effect of the second seal 500.

[0085] The first sealing member 400 and the second sealing member 500 can be integrated into one piece, which reduces the number of parts, makes assembly and disassembly more convenient, and improves production efficiency.

[0086] The electric toothbrush 1 further comprises a buffer, which is arranged between the first limiter 322 and the second limiter 311 in the circumferential direction of the output shaft 321. When the first limiter 322 and the second limiter 311 are close to each other, the buffer is used to buffer and absorb the force between the first limiter 322 and the second limiter 311. The buffer has a certain elasticity, for example, the buffer can be made of sponge material, foam or soft rubber material. In this way, the impact force on the first limiter 322 and the second limiter 311 can be reduced, the probability of damage to the first limiter 322 and the second limiter 311 can be reduced, and the noise generated by the collision can be reduced.

[0087] like Figure 2-Figure 4 As shown, the first stopper 322 is an elastic member, for example, the first stopper 322 can be made of sponge material, foam or soft rubber material. In this way, when the first stopper 322 contacts the second stopper 311, the first stopper 322 can be elastically deformed to absorb the impact force, thereby reducing the probability of damage to the first stopper 322 and the second stopper 311, and reducing the noise generated by the collision.

[0088] 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 stop on the outer peripheral surface of the output shaft 321.

[0089] In this way, the output shaft 321 and the first limiting member 322 are made of different materials to ensure the rigidity of the output shaft 321 , and the first limiting member 322 is easily replaced, which is beneficial to reducing the maintenance cost of the electric toothbrush 1 .

[0090] The electric toothbrush 1 further includes a force detection member and a circuit board 800. The force detection member is disposed on the output shaft 321 and moves with the output shaft 321. The force detection member is used to detect the force condition of the output shaft 321. The circuit board 800 is connected to the force detection member through a flexible electrical connector. The force detection member may be a torque sensor, and the flexible electrical connector may be a wire or a flexible printed circuit 800 (FPC).

[0091] By providing a force detection member, the force condition of the output shaft 321 can be fed back to the circuit board 800, and the circuit board 800 can control the movement of the rotor assembly 320 according to the feedback result. In addition, the flexible electrical connector is also easy to deform, and the force detection member can be reliably connected to the flexible electrical connector when it moves to a different position. Since the rotation range of the rotor assembly 320 is limited, the flexible electrical connector is not easily damaged due to excessive deformation, thereby ensuring the reliability of the electrical connection between the force detection member and the circuit board 800.

[0092] like Fig.10 As shown, the electric toothbrush 1 further includes a first seal 400, which is disposed between the output shaft 321 and the mounting bracket 200, or between the output shaft 321 and the handle shell 100, or between the output shaft 321 and the mounting bracket 200, and between the output shaft 321 and the handle shell 100. By providing the first seal 400, liquid can be prevented from flowing into the mounting bracket 200, thereby improving the sealing performance of the electric toothbrush 1, wherein the first seal 400 can be a soft plastic part, such as made of rubber or other materials.

[0093] The force detection component is located on the side of the first sealing component 400 facing away from the brush head 110. In this way, the first sealing component 400 can also prevent the liquid from flowing to the force detection component, reduce the probability of corrosion and short circuit of the force detection component, improve circuit safety, and prevent the pressure of the liquid from interfering with the detection result of the force detection component, and avoid the force detection component affecting the sealing effect of the first sealing component 400.

[0094] The above-mentioned force detection member and the first limit member 322 are located on opposite sides of the stator assembly 310, so that 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 change in shape structure 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 detection accuracy of the force detection member and improve the detection accuracy. On the other hand, the activity path of the first limit member 322 can avoid the wire of the force detection member and prevent the first limit member 322 and the wire of the force detection member from interfering with each other.

[0095] One of the force detecting member and the first limiting member 322 is arranged in the housing 312 of the stator assembly 310 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 change in shape structure in the area near the first limiting member 322. Therefore, the deformation of various areas of the output shaft 321 is inconsistent. By setting the distance between the force detecting member and the first limiting member 322 relatively far, on the one hand, the deformation of the area near the first limiting member 322 can avoid the impact of the detection accuracy of the force detecting member on the detection accuracy, 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.

[0096] The above-mentioned circuit board 800 is provided with a first electrical connection position, which is located between the center of the stator assembly 310 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 310 in its axial direction and the force detection part.

[0097] 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.

[0098] The electric toothbrush 1 further comprises a circuit board 800, a force detection member and a position detection member 325. The circuit board 800 is provided with a first electrical connection position and a second electrical connection position, and the first electrical connection position is closer to the brush head 110 than the second electrical connection position. The force detection member is provided on the side of the stator assembly 310 facing the brush head 110 and connected to the first electrical connection position, and the force detection member is used to detect the force condition of the output shaft 321. The position detection member 325 is provided on the side of the stator assembly 310 facing away from the brush head 110 and connected to the second electrical connection position, and the position detection member 325 is used to detect the position of the output shaft 321 relative to the stator assembly 310.

[0099] In this way, the distance between the first electrical connection position and the force detection component is closer, and the distance between the second electrical connection position and the position detection component 325 is closer. On the one hand, the length of the wire between the first electrical connection position and the force detection component can be shortened, as can the length of the wire between the second electrical connection position and the position detection component 325. On the other hand, line confusion can be avoided, the routing can be clear, and wear can be reduced.

[0100] The first electrical connection position is closer to the brush head 110 relative to the position detection member 325, so that the distance between the first electrical connection position and the force detection member is further reduced, thereby further shortening the length of the wire between the first electrical connection position and the force detection member, and the wiring is clearer, further reducing the probability of line confusion.

[0101] like Figure 3 , Figure 5 and Figure 6 As shown, the electric toothbrush 1 further includes a reset member 900, the rotor assembly 320 is connected to one end of the reset member 900, and at least one of the handle housing 100, the mounting bracket 200 and the stator assembly 310 is connected to the other end of the reset member 900, and the reset member 900 has a reset force to reset the rotor assembly 320 to the initial angle. The reset member 900 may be a torsion spring, a spring or the like.

[0102] When the electric toothbrush 1 is powered off, the reset member 900 can drive the rotor assembly 320 to return to its initial position relative to the stator assembly 310, and keep the rotor assembly 320 in the initial position to facilitate the next use of the electric toothbrush 1. Moreover, since the reset member 900 has the elastic force to keep the rotor assembly 320 in the initial position, when the user applies toothpaste on the brush head 110, the brush head 110 is less likely to rotate, and the toothpaste can be applied more smoothly.

[0103] The rotation angle range of the rotor assembly 320 relative to the stator assembly 310 is 15° to 60°. The rotation angle range of the rotor assembly 320 relative to the stator assembly 310 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°.

[0104] When the rotation angle range of the rotor assembly 320 relative to the stator assembly 310 is less than 15°, the rotation angle range of the rotor assembly 320 is too small, resulting in a smaller rotor angle range of the brush head 110, low efficiency in cleaning the oral cavity, too long a single brushing time or inadequate cleaning; when the rotation angle range of the rotor assembly 320 relative to the stator assembly 310 is greater than 60°, the rotation angle range of the rotor assembly 320 is too large, and when toothpaste is squeezed onto the brush head 110, the rotation range of the brush head 110 is large, and the toothpaste is easily lost from the brush head 110 or smeared to other locations.

[0105] By setting the rotation angle range of the rotor assembly 320 relative to the stator assembly 310 to 15° to 60°, the rotation angle range of the rotor assembly 320 is larger, the oral cavity can be cleaned efficiently and thoroughly, and the single brushing time can be shortened. In addition, the rotation angle range of the rotor assembly 320 is not too large, and toothpaste can be easily applied to the brush head 110.

[0106] The drive motor 300 is configured as a servo motor. The plurality of windings 3131 may be arranged evenly and spaced apart along the circumference of the drive motor 300, and the plurality of permanent magnets 3231 may be arranged evenly and spaced apart along the circumference of the drive motor 300. In this way, the drive motor 300 can control the output shaft 321 according to the position, speed and torque of the output shaft 321, thereby realizing closed-loop control of the output shaft 321, and the drive motor 300 has high precision, fast response speed and stable operation.

[0107] 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 based on the directions or positional relationships shown in the drawings, it 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 limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0108] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electric toothbrush, characterized in that: include: Handle shell; A mounting bracket, disposed in the handle shell; A driving motor, comprising a stator assembly and a rotor assembly, wherein the stator assembly is disposed in the mounting bracket and surrounds the rotor assembly, the rotor assembly is rotatable relative to the stator assembly, and the rotor assembly comprises an output shaft, a portion of which extends out of the handle housing 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.

2. The electric toothbrush according to claim 1, characterized in that: The output shaft comprises a protruding section, the protruding section is located outside the stator assembly, and a portion of the protruding section protrudes from the handle shell to be connected to the brush head; The electric toothbrush is constructed in at least one of the following ways: The first limiting member is disposed on the portion of the extending section located inside the mounting bracket, and the second limiting member is disposed on the inner wall of the mounting bracket; The first limiting member is disposed on the portion of the extending section outside the mounting bracket, and the second limiting member is disposed on the inner wall of the handle shell; 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, characterized in that: 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, characterized in that: When the second limiting member is configured as the limiting groove and is disposed on the mounting bracket, the mounting bracket includes a first bracket and a second bracket, the first bracket and the second bracket are disposed 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: When 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 side of the limiting groove facing away from the brush head is open, or the handle shell is further provided with a guide groove, the guide groove is connected with 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, characterized in that: The stator assembly comprises a casing and a stator core, wherein the stator core is arranged in the casing; The rotor assembly further comprises 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 stopper, and at least one of the stator core and the casing is provided with the second stopper; 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 is sleeved on the output shaft and is located on a side of the stator assembly facing away from the brush head, and the first stopper is located on a side of the stator assembly facing the brush head; A position detection component is arranged on a 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.

9. The electric toothbrush according to claim 6, characterized in that: The rotor assembly further comprises: A mounting seat is sleeved on the output shaft and is 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 stopper. 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 and is used to cover the open opening. The end cover is provided with the second stopper on a side facing away from the brush head. A position detection component is arranged on a 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.

10. The electric toothbrush according to claim 1, characterized in that: Also includes: A first sealing member is 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, characterized in that: Also includes: The second sealing member is arranged 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, characterized in that: 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, and is used for buffering and absorbing the force between the first limit member and the second limit member when the first limit member and the second limit member are close to each other.

13. The electric toothbrush according to claim 1, characterized in that: The first limiting member is an elastic member, the output shaft is provided with an insertion hole, and the first limiting member is inserted into the insertion hole.

14. The electric toothbrush according to claim 1, characterized in that: 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 is 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, characterized in that 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, characterized in that: 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, characterized in that Also includes: A circuit board, having 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, disposed on a side of the stator assembly facing the brush head and connected to the first electrical connection position, for detecting a force condition of the output shaft; A position detection component is arranged on a side of the stator assembly facing away from the brush head and 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, characterized in that The first electrical connection position is closer to the brush head than the position detection member.

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 for resetting 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.

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