Motor and electric toothbrush

Abstract

The utility model discloses a motor and an electric toothbrush, and the motor comprises a rotor assembly which is rotatably arranged around the rotation axis of the rotor assembly and along a first direction, and is provided with a limiting part; the stator assembly is arranged on the outer side of the rotor assembly in a sleeving mode, a stopping structure is arranged on the stator assembly, and the stopping structure comprises a first stopping part and a second stopping part which are arranged in the first direction in a spaced mode; and the limiting piece is in limiting fit with the first stopping part and the second stopping part in the first direction, so that the rotor assembly rotates within a preset angle range. According to the toothbrush, the coverage range of the toothbrush head during oral cavity cleaning can be expanded, so that omission areas can be reduced in the oral cavity cleaning process of a user, and the cleaning effect can be improved.

Description

Technical Field

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

[0002] In conventional electric toothbrushes, the rotor assembly in the motor typically only vibrates at high frequencies, driving the toothbrush head to vibrate and clean the mouth. However, vibration-based cleaning provides poor coverage, which can lead to missed areas and poor cleaning results. Utility Model Content

[0003] In response to the above-mentioned deficiencies in the related art, the present application provides a motor and an electric toothbrush to solve the problem of poor coverage when the electric toothbrush in the related art cleans the oral cavity by vibration.

[0004] In order to solve the above technical problems, in a first aspect, the present application provides a motor, which includes:

[0005] a rotor assembly, the rotor assembly being rotatably arranged about its own rotation axis and in a first direction, and a limiting member being provided on the rotor assembly;

[0006] A stator assembly is sleeved on the outside of the rotor assembly, and a stopping structure is provided on the stator assembly. The stopping structure includes a first stopping portion and a second stopping portion spaced apart in the first direction. The limiting member cooperates with the first stopping portion and the second stopping portion in limiting positioning in the first direction to allow the rotor assembly to rotate within a preset angle range.

[0007] In the present application, since the rotor assembly in the motor is rotatably arranged around its own rotation axis and along the first direction, and since a limit member is provided on the rotor assembly, a stop structure is provided on the stator assembly, wherein the stop structure includes a first stop portion and a second stop portion spaced apart in the first direction, and the limit member cooperates with the first stop portion and the second stop portion to limit the position in the first direction. Therefore, during the rotation of the rotor assembly, the limit member, driven by the rotor assembly, can move around the rotation axis of the rotor assembly and along the first direction, and regardless of whether the limit member moves in the forward or reverse direction along the first direction, the limit member will limit the position with the first stop portion or the second stop portion spaced apart in the first direction, thereby allowing the rotor assembly to rotate within a certain angular range. At the same time, by adjusting the spacing between the first stop portion and the second stop portion in the first direction, the rotation angle range of the rotor assembly can be adjusted, so that the rotor assembly can rotate within a preset angular range.

[0008] In summary, since the rotor assembly in the motor of the present application can rotate within a preset angle range, when the motor is applied to an electric toothbrush, the rotor assembly is connected to the toothbrush head through a transmission. In this way, driven by the rotor assembly, the toothbrush head can not only clean the oral cavity by vibration, but also swing within a preset angle range, thereby expanding the coverage range of the toothbrush head when cleaning the oral cavity, allowing users to reduce missed areas during the process of cleaning the oral cavity, thereby improving the cleaning effect.

[0009] In a possible implementation of the first aspect, the rotor assembly also includes a rotor shaft, and the limiting member includes a limiting sleeve sleeved on the rotor shaft and a limiting protrusion protruding from the outer peripheral wall of the limiting sleeve, the limiting protrusion is located between the first stop portion and the second stop portion, and the limiting protrusion cooperates with the first stop portion and the second stop portion to limit the position in the first direction.

[0010] This arrangement, on the one hand, makes it easier to install the stopper on the rotor assembly because the stopper is a separate component and its retaining sleeve is mounted on the rotor shaft. Furthermore, if the stopper becomes damaged or worn, it can be replaced independently without having to replace the entire rotor assembly or motor, reducing maintenance costs.

[0011] On the other hand, since the limiting protrusion has a relatively strong structural strength, the limiting cooperation between the limiting protrusion and the stopping structure can enhance the reliability of the limiting cooperation between the limiting member and the stopping structure.

[0012] In a possible implementation of the first aspect, the stopping structure includes a first stopping structure and a second stopping structure arranged in the first direction, and the limiting member includes two limiting protrusions arranged in the first direction, one of the two limiting protrusions is located between the first stopping portion and the second stopping portion in the first stopping structure, and the other is located between the first stopping portion and the second stopping portion in the second stopping structure.

[0013] With such arrangement, during the rotation of the rotor assembly, the two limiting protrusions can respectively cooperate with the first stopping structure and the second stopping structure to limit the position, thereby dispersing the pressure exerted on the stator assembly when limiting the rotor assembly, better protecting the rotor assembly and the stator assembly, and also ensuring the stability of the rotation of the rotor assembly.

[0014] In a possible implementation of the first aspect, a direction perpendicular to an extension direction of a central axis of the limiting sleeve is a second direction, and the two limiting protrusions are respectively provided on both sides of the limiting sleeve;

[0015] The two limiting protrusions are arranged opposite to each other in the second direction; or, the two limiting protrusions are staggered in the second direction.

[0016] When the two limiting protrusions are arranged relative to each other in the second direction, during the forward rotation of the rotor assembly along the first direction, the two limiting protrusions can respectively cooperate with the first stop structure and the second stop structure in limiting manner, and during the reverse rotation of the rotor assembly along the first direction, the two limiting protrusions can also respectively cooperate with the first stop structure and the second stop structure in limiting manner, that is, no matter whether the rotor assembly rotates in the forward or reverse direction along the first direction, the two limiting protrusions can move in the entire range between the first stop part and the second stop part, so that the rotor assembly can achieve the maximum rotation angle during the rotation process.

[0017] When the two limiting protrusions are staggered in the second direction, no matter whether the rotor assembly rotates in the forward or reverse direction along the first direction, only one of the two limiting protrusions will cooperate with the stopping structure, and the other limiting protrusion will only be spaced apart from the first stopping portion and the second stopping portion, so that the two limiting protrusions can only move within a partial range between the first stopping portion and the second stopping portion. In this case, as the relative positions of the two limiting protrusions in the first direction are different, the rotation angle range of the rotor assembly will also be different. Therefore, by limiting the relative positions of the two limiting protrusions in the first direction, the rotation angle of the rotor assembly can be limited, which is conducive to making the rotation angle range of the rotor assembly more adaptable to the angle requirements.

[0018] In a possible implementation of the first aspect, the extension direction of the rotation axis of the rotor assembly is a third direction;

[0019] The limiting member includes a first limiting member and a second limiting member, and in the third direction, the first limiting member and the second limiting member are respectively arranged at two ends of the rotor assembly.

[0020] In the third direction, the first and second stoppers are positioned at either end of the rotor assembly. This layout helps achieve better balance. When the rotor assembly rotates in the third direction, it will not tilt or deflect due to excessive force on one side, thereby ensuring smooth rotation of the rotor assembly. This in turn ensures the stability of the stopper's engagement with the retaining structure, facilitating precise control of the rotor assembly's rotational angle range.

[0021] In a possible implementation of the first aspect, in the third direction, the limiting protrusions on the first limiting member and the limiting protrusions on the second limiting member are aligned one by one; or, in the third direction, at least one of the limiting protrusions on the first limiting member and the limiting protrusions on the second limiting member are staggered.

[0022] When the limiting protrusions on the first limiting member and the limiting protrusions on the second limiting member are aligned one by one, they can provide uniform and symmetrical restriction of the rotation of the rotor assembly in the third direction. Regardless of whether the rotor assembly rotates in the forward or reverse direction, the limiting protrusions at both ends interact with the retaining structure on the stator assembly in the same position and in the same manner. This uniform restriction ensures that when the rotor assembly rotates within a preset angular range, the rotor shaft will not deviate or tilt due to uneven force at both ends, thereby further ensuring the stability of the rotation and facilitating the precise control of the rotor assembly's rotation angle range.

[0023] When the limiting protrusions on the first and second limiting members are staggered, the rotor assembly's rotational constraints become more complex, allowing for a diverse range of rotation angles, thereby facilitating adaptation to diverse application requirements. Furthermore, the staggered limiting protrusions can interact with the retaining structure on the stator assembly to achieve finer rotation angle adjustments, providing more precise rotation angle control.

[0024] In a possible implementation manner of the first aspect, the limiting protrusion on the first limiting member is connected to the limiting protrusion on the second limiting member in a one-to-one correspondence.

[0025] Such a setting, on the one hand, can ensure that the limiting protrusion and the stop structure have a larger contact area when they are limited and matched, thereby not only further enhancing the reliability of the limiting match, but also helping to avoid damage to the stator assembly due to collision during limiting.

[0026] On the other hand, by connecting the corresponding stop protrusions at both ends, a more stable structural system can be formed. During the rotation of the rotor assembly, the connected stop protrusions can jointly bear the applied force, effectively preventing the stop protrusions from deformation or displacement due to external forces or vibrations, maintaining their stability in the preset position, and thus ensuring that the rotor assembly can rotate within the correct angular range.

[0027] In a possible implementation of the first aspect, the extension direction of the rotation axis of the rotor assembly is a third direction;

[0028] The limiting protrusion is a strip-shaped protrusion whose length direction extends along the third direction.

[0029] Such an arrangement can increase the contact area of ​​the limiting cooperation between the limiting protrusion and the stop structure, thereby not only further enhancing the reliability of the limiting cooperation, but also helping to avoid damage to the stator assembly due to collision during limiting.

[0030] In a possible implementation of the first aspect, the stator assembly includes a stator core, a winding frame provided on the stator core, a coil is provided on the winding frame, and the stopping structure is provided on the stator core.

[0031] Since the stator core, as the core of the stator assembly, typically possesses high strength and stability, placing the retaining structure on the stator core provides reliable support for the retaining structure, leveraging the stator core's robust structure. During motor operation, the rotation of the rotor assembly generates certain impact forces and vibrations. The robust stator core prevents the retaining structure from easily deforming or shifting due to these external forces, thus ensuring the stable function of the retaining structure.

[0032] In a possible implementation of the first aspect, the limiting member is arranged on the inner side of the winding frame, the stator core includes an inner core arranged between the winding frame and the limiting sleeve, and the stopping structure is arranged on the inner core.

[0033] Such an arrangement can, to a certain extent, prevent the limiting protrusion from abutting against the winding frame or the coil, thereby helping to avoid damage to the winding frame or the coil.

[0034] In a possible implementation of the first aspect, the inner iron core includes a first inner iron core and a second inner iron core that are spaced apart and adjacent to each other in the first direction, one end of the first inner iron core in the first direction is a first end, and one end of the second inner iron core in the first direction adjacent to the first end is a second end, the first stop portion is set at the first end, and the second stop portion is set at the second end.

[0035] This arrangement ensures that the first and second inner cores are spaced apart in the first direction, ensuring a relatively constant distance between the first and second stop portions. This ensures a more stable fit between the stop member and the stop portion during motor operation, preventing significant displacement changes due to external forces or vibration. This stable limiting action helps improve the reliability and stability of the motor and reduces the probability of failures caused by inaccurate limiting.

[0036] Furthermore, placing the stop structures on both inner cores disperses the forces acting on the stop structures during rotor assembly rotation. When the rotor assembly reaches its limit of rotation and contacts the stop structures, the forces acting on the first and second inner cores are transferred respectively. This force distribution reduces the stress on a single inner core and improves the overall strength and durability of the stator core.

[0037] In a possible implementation of the first aspect, the limiting member is a magnetic steel member.

[0038] With such a setting, on the one hand, since the magnetic steel parts have strong magnetism, they can generate magnetic adsorption force with the corresponding parts on the stator assembly. Therefore, during the operation of the motor, this magnetic adsorption force can make the fit between the limit part and the stopping structure on the stator assembly tighter, enhance the stability of the limit, and thus achieve more precise angle control.

[0039] On the other hand, due to the presence of magnetic attraction, the contact between the limiter and the stop structure can be softer, which helps to reduce mechanical wear and extend the service life of the motor. At the same time, reducing mechanical wear not only reduces the noise during motor operation, but also improves the motor's operating efficiency.

[0040] In a possible implementation of the first aspect, a plurality of the limiting protrusions are provided between the first stopping portion and the second stopping portion in one of the stopping structures.

[0041] When there are multiple limiting protrusions, each contact between the limiting protrusion and the stop structure corresponds to a smaller rotation angle range, which can further refine the rotation angle range of the rotor assembly. In applications where precise rotation angle adjustment is required, the rotation angle of the rotor assembly can be precisely adjusted according to specific needs, thereby improving the operating accuracy of the motor.

[0042] In a second aspect, the present application further provides an electric toothbrush, comprising:

[0043] Toothbrush head;

[0044] handle;

[0045] The motor described in any one of the first aspects is arranged in the handle, and the rotor assembly is transmission-connected to the toothbrush head.

[0046] In the present application, since the rotor assembly in the motor can rotate within a preset angle range, when the motor is applied to an electric toothbrush, the rotor assembly is connected to the toothbrush head through a transmission. In this way, driven by the rotor assembly, the toothbrush head can not only clean the oral cavity by vibration, but also swing within a preset angle range, thereby expanding the coverage range of the toothbrush head when cleaning the oral cavity, allowing the user to reduce the missed areas during the process of cleaning the oral cavity, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. 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 these drawings without creative work.

[0048] Figure 1 One of the internal structure diagrams of the motor provided in the embodiment of the present application;

[0049] Figure 2 The second schematic diagram of the internal structure of the motor provided in the embodiment of the present application;

[0050] Figure 3 The third schematic diagram of the internal structure of the motor provided in the embodiment of the present application;

[0051] Figure 4 A schematic diagram of a rotor assembly provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of the structure of a motor provided in an embodiment of the present application;

[0053] Figure 6 A schematic diagram of an electric toothbrush provided in an embodiment of the present application.

[0054] Description of reference numerals:

[0055] 1- rotor assembly; 11- rotor shaft; 12- limiting member; 121- limiting sleeve; 122- limiting protrusion; 123- first limiting member; 124- second limiting member;

[0056] 2- stator assembly; 21- stopper structure; 211- first stopper portion; 212- second stopper portion; 213- first stopper structure; 214- second stopper structure; 22- stator core; 221- inner core; 2211- first inner core; 2212- second inner core; 23- winding frame; 24- coil;

[0057] 100-motor;

[0058] 200-toothbrush head;

[0059] 300-handle. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0061] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0062] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0063] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0064] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0065] As described in the background of this application, the rotor assembly in the motor of an electric toothbrush in related art is typically only capable of high-frequency vibration, which drives the toothbrush head to vibrate and achieve the function of cleaning the mouth. However, electric toothbrushes use vibration to clean the mouth, which provides poor coverage and can easily cause users to miss many areas during the cleaning process, resulting in poor cleaning results.

[0066] Example 1

[0067] In view of the above-mentioned problems, the present application provides a motor to solve the problem of poor coverage when the electric toothbrush cleans the oral cavity by vibration in the related art.

[0068] The technical solution of this application will be further described below with reference to specific embodiments and drawings:

[0069] like Figure 1As shown, the motor 100 includes a rotor assembly 1 and a stator assembly 2, wherein the rotor assembly 1 rotates around its own axis of rotation and along a first direction (eg Figure 1 The rotor assembly 1 is rotatably arranged in the A direction, and a limiting member 12 is provided on the rotor assembly 1.

[0070] The stator assembly 2 is sleeved on the outside of the rotor assembly 1, and a stopping structure 21 is provided on the stator assembly 2. The stopping structure 21 includes a first stopping portion 211 and a second stopping portion 212 spaced apart in a first direction. The limiting member 12 cooperates with the first stopping portion 211 and the second stopping portion 212 in limiting positioning in the first direction so that the rotor assembly 1 rotates within a preset angle range.

[0071] In the present application, since the rotor assembly 1 in the motor 100 is rotatably arranged about its own rotation axis and in a first direction, and since a limit member 12 is provided on the rotor assembly 1, a stop structure 21 is provided on the stator assembly 2, wherein the stop structure 21 includes a first stop portion 211 and a second stop portion 212 spaced apart in the first direction, and the limit member 12 cooperates with the first stop portion 211 and the second stop portion 212 to limit the movement in the first direction. Therefore, during the rotation of the rotor assembly 1, the limit member 12, driven by the rotor assembly 1, can move about the rotation axis of the rotor assembly 1 and in the first direction. Regardless of whether the limit member 12 moves in the forward or reverse direction of the first direction, the limit member 12 will limit the movement in the first direction with the first stop portion 211 or the second stop portion 212 spaced apart, thereby allowing the rotor assembly 1 to rotate within a certain angular range. At the same time, by adjusting the spacing between the first stop portion 211 and the second stop portion 212 in the first direction, the rotation angle range of the rotor assembly 1 can be adjusted, thereby allowing the rotor assembly 1 to rotate within a preset angular range.

[0072] In summary, since the rotor assembly 1 in the motor 100 of the present application can rotate within a preset angle range, when the motor 100 is applied to an electric toothbrush, the rotor assembly 1 is connected to the toothbrush head through a transmission. In this way, driven by the rotor assembly 1, the toothbrush head can not only clean the oral cavity by vibration, but also swing within a preset angle range, thereby expanding the coverage range of the toothbrush head when cleaning the oral cavity, allowing the user to reduce the missed areas during the process of cleaning the oral cavity, thereby improving the cleaning effect.

[0073] Further, if Figure 1 As shown, the rotor assembly 1 also includes a rotor shaft 11, and the limiting member 12 includes a limiting sleeve 121 sleeved on the rotor shaft 11, and a limiting protrusion 122 protruding from the outer peripheral wall of the limiting sleeve 121. The limiting protrusion 122 is located between the first stopping portion 211 and the second stopping portion 212, and the limiting protrusion 122 cooperates with the first stopping portion 211 and the second stopping portion 212 in limiting positioning in the first direction.

[0074] This arrangement, on the one hand, because the stopper 12 is an independent component and the stopper sleeve 121 in the stopper 12 is sleeved on the rotor shaft 11, the stopper 12 can be easily removed from the rotor assembly 1, thereby facilitating the installation of the stopper 12 on the rotor assembly 1. Furthermore, if the stopper 12 becomes damaged or worn, it can be replaced independently without having to replace the entire rotor assembly 1 or motor 100, thereby reducing maintenance costs.

[0075] On the other hand, since the limiting protrusion 122 has a relatively strong structural strength, the limiting cooperation between the limiting protrusion 122 and the stopping structure 21 can enhance the reliability of the limiting cooperation between the limiting member 12 and the stopping structure 21.

[0076] In other embodiments, a protrusion is integrally formed on the outer circumferential wall of the rotor shaft 11, and the protrusion serves as the stopper 12. This configuration provides for greater structural strength between the stopper 12 and the rotor shaft 11, thereby enhancing the reliability of the stopper 12 and the retaining structure 21.

[0077] Further, if Figure 2 As shown, the stopping structure 21 includes a first stopping structure 213 and a second stopping structure 214 arranged in the first direction, and the limiting member 12 includes two limiting protrusions 122 arranged in the first direction, one of the two limiting protrusions 122 is located between the first stopping portion 211 and the second stopping portion 212 in the first stopping structure 213, and the other is located between the first stopping portion 211 and the second stopping portion 212 in the second stopping structure 214.

[0078] With such arrangement, during the rotation of the rotor assembly 1, the two limiting protrusions 122 can respectively cooperate with the first stopping structure 213 and the second stopping structure 214 to limit the position, thereby dispersing the pressure exerted on the stator assembly 2 when limiting the rotor assembly 1, better protecting the rotor assembly 1 and the stator assembly 2, and also ensuring the stability of the rotation of the rotor assembly 1.

[0079] In other embodiments, the stopper 12 may also include a stopper protrusion 122. In this case, only one stopper structure may be provided. This configuration can simplify the structure of the stopper 12 and the stator assembly 2, thereby facilitating the processing of the stopper 12 and the stator assembly 2.

[0080] Furthermore, the direction perpendicular to the extension direction of the central axis of the limiting sleeve 121 is the second direction (eg Figure 1 and Figure 3 The two limiting protrusions 122 are respectively provided on both sides of the limiting sleeve 121.

[0081] Regarding the positional relationship between the two limiting protrusions 122, in one embodiment, Figure 1 The two limiting protrusions 122 are arranged opposite to each other in the second direction.

[0082] In this way, during the forward rotation of the rotor assembly 1 along the first direction, the two limiting protrusions 122 can respectively cooperate with the first stop structure 213 and the second stop structure 214 in a limiting manner. During the reverse rotation of the rotor assembly 1 along the first direction, the two limiting protrusions 122 can also respectively cooperate with the first stop structure 213 and the second stop structure 214 in a limiting manner. That is, no matter whether the rotor assembly 1 rotates forward or reversely along the first direction, the two limiting protrusions 122 can move in the entire range between the first stop portion 211 and the second stop portion 212, so that the rotor assembly 1 can achieve the maximum rotation angle during the rotation process.

[0083] In another embodiment, if Figure 3 As shown, the two limiting protrusions 122 are staggered in the second direction.

[0084] With such arrangement, no matter whether the rotor assembly 1 rotates in the forward or reverse direction along the first direction, only one of the two limiting protrusions 122 will cooperate with the stopping structure 21, and the other limiting protrusion 122 will only be spaced apart from the first stopping portion 211 and the second stopping portion 212, so that the two limiting protrusions 122 can only move within a partial range between the first stopping portion 211 and the second stopping portion 212. In this case, as the relative positions of the two limiting protrusions 122 in the first direction are different, the rotation angle range of the rotor assembly 1 will also be different. Therefore, by limiting the relative positions of the two limiting protrusions 122 in the first direction, the rotation angle of the rotor assembly 1 can be limited, which is conducive to making the rotation angle range of the rotor assembly 1 more adaptable to the angle requirements.

[0085] Regarding the arrangement of the limiting member 12 in the rotor assembly 1, further, as Figure 4 As shown, the extension direction of the rotation axis of the rotor assembly 1 is the third direction (such as Figure 4 The limiting member 12 includes a first limiting member 123 and a second limiting member 124, and in the third direction, the first limiting member 123 and the second limiting member 124 are respectively provided at two ends of the rotor assembly 1.

[0086] In the third direction, the first and second limiting members 123, 124 are disposed at opposite ends of the rotor assembly 1. This arrangement facilitates better balance. When the rotor assembly 1 rotates in the third direction, it will not tilt or deflect due to excessive force on one side, thereby ensuring smooth rotation of the rotor assembly 1. This, in turn, ensures the stability of the limiting engagement between the limiting protrusion 122 and the retaining structure 21, facilitating precise control of the rotational angle range of the rotor assembly 1.

[0087] In addition, it should be noted that, in the third direction, both ends of the stator assembly 2 are also provided with a stopping structure 21 so that the limiting protrusions 122 in the limiting members 12 at both ends of the rotor assembly 1 can cooperate with the stator assembly 2 in a limiting manner.

[0088] In other embodiments, a stopper 12 may also be provided on the rotor assembly 1. This configuration can reduce the number of stoppers 12, thereby simplifying the structure of the rotor assembly 1 and facilitating the processing and manufacturing of the rotor assembly 1.

[0089] Regarding the positional relationship between the upper limit protrusions 122 of the two limit members 12, in one embodiment, as Figure 4 As shown, in the third direction, the limiting protrusions 122 on the first limiting member 123 and the limiting protrusions 122 on the second limiting member 124 are aligned one by one.

[0090] With this arrangement, they can provide uniform and symmetrical restriction of the rotation of the rotor assembly 1 in the third direction. Regardless of whether the rotor assembly 1 rotates in the forward or reverse direction, the limiting protrusions 122 at both ends interact with the retaining structure 21 on the stator assembly 2 at the same location and in the same manner. This uniform restriction prevents the rotor shaft 11 from shifting or tilting due to uneven forces applied to both ends when the rotor assembly 1 rotates within a preset angular range, thereby further ensuring rotational stability and facilitating precise control of the rotational angular range of the rotor assembly 1.

[0091] In another embodiment, in the third direction, at least one limiting protrusion 122 on the first limiting member 123 and the limiting protrusion 122 on the second limiting member 124 are staggered.

[0092] This arrangement makes the rotational restrictions imposed on the rotor assembly 1 more complex, allowing the rotor assembly 1 to have a diverse range of rotation angles, thereby facilitating the rotational angle range of the rotor assembly 1 to meet different application requirements. Furthermore, the staggered limiting protrusions 122 can cooperate with the retaining structure 21 on the stator assembly 2 to achieve smaller rotation angle adjustments, thereby providing more precise rotation angle control.

[0093] Regarding the connection relationship between the upper limit protrusions 122 of the two limit members 12, in one embodiment, as Figure 4 As shown, the limiting protrusion 122 on the first limiting member 123 and the limiting protrusion 122 on the second limiting member 124 are independently provided.

[0094] Because the limiting protrusions 122 on the two limiting members 12 are independent of each other, they can be independently adjusted in motion when engaged with the retaining structure 21 on the stator assembly 2. This means that during operation of the motor 100, the limiting protrusions 122 on the first limiting member 123 and the second limiting member 124 can be individually optimized and adjusted according to different operating conditions and requirements, thereby achieving more flexible angle control and improving the adaptability of the motor 100.

[0095] In another embodiment, the limiting protrusions 122 on the first limiting member 123 are connected to the limiting protrusions 122 on the second limiting member 124 in a one-to-one correspondence.

[0096] Such a configuration, on the one hand, can ensure that the limiting protrusion 122 and the stopping structure 21 have a larger contact area when limiting and cooperating, thereby not only further enhancing the reliability of the limiting cooperation, but also helping to avoid damage to the stator assembly 2 due to collision during limiting.

[0097] On the other hand, by connecting the corresponding limiting protrusions 122 at both ends, a more stable structural system can be formed. During the rotation of the rotor assembly 1, the connected limiting protrusions 122 can jointly withstand the applied force, effectively preventing the limiting protrusions 122 from deformation or displacement due to external forces or vibrations, maintaining their stability in the preset position, and thus ensuring that the rotor assembly 1 can rotate within the correct angular range.

[0098] For the limiting protrusion 122, further, as Figure 4 As shown, the limiting protrusion 122 is a strip-shaped protrusion whose length direction extends along the third direction.

[0099] Such a configuration can increase the contact area between the limiting protrusion 122 and the blocking structure 21 , thereby not only further enhancing the reliability of the limiting cooperation, but also helping to prevent the stator assembly 2 from being damaged due to collision during limiting.

[0100] In other embodiments, the limiting protrusion 122 may also be a hemispherical protrusion, a cylindrical protrusion whose length direction extends perpendicular to the third direction, or a polygonal prism protrusion. The structural configuration of the limiting protrusion 122 is relatively flexible and can be specifically configured according to actual needs. This embodiment of the present application does not impose any specific limitations on this.

[0101] For the stator assembly 2, further, as Figure 1As shown, the stator assembly 2 includes a stator core 22 , a winding frame 23 disposed on the stator core 22 , a coil 24 disposed on the winding frame 23 , and a stopping structure 21 disposed on the stator core 22 .

[0102] Since the stator core 22, as the core of the stator assembly 2, generally has high strength and stability, the retaining structure 21 is disposed on the stator core 22. The solid structure of the stator core 22 provides reliable support for the retaining structure 21. During operation of the motor 100, the rotation of the rotor assembly 1 generates certain impact forces and vibrations. The solid stator core 22 ensures that the retaining structure 21 will not be easily deformed or displaced by these external forces, thereby ensuring the stable function of the retaining function.

[0103] In other embodiments, when the winding frame 23 has a relatively strong structural strength, the stopping structure 21 may also be provided on the winding frame 23 . This, to a certain extent, facilitates the arrangement of the stopping structure 21 on the stator assembly 2 .

[0104] Further, if Figure 1 As shown, the limiting member 12 is arranged on the inner side of the winding frame 23 , the stator core 22 includes an inner core 221 arranged between the winding frame 23 and the limiting sleeve 121 , and the stopping structure 21 is arranged on the inner core 221 .

[0105] Such a configuration can, to a certain extent, prevent the limiting protrusion 122 from abutting against the winding frame 23 or the coil 24 , thereby helping to avoid damage to the winding frame 23 or the coil 24 .

[0106] Further, as Figure 2 As shown, the inner core 221 includes a first direction (such as Figure 2 The first inner iron core 2211 and the second inner iron core 2212 are spaced and adjacent to each other in the A direction in the middle, one end of the first inner iron core 2211 in the first direction is the first end, and the end of the second inner iron core 2212 adjacent to the first end in the first direction is the second end. The first stop portion 211 is set at the first end, and the second stop portion 212 is set at the second end.

[0107] This arrangement ensures that the first inner core 2211 and the second inner core 2212 are spaced apart in the first direction, ensuring a relatively constant distance between the first stop 211 and the second stop 212. This ensures a more stable fit between the stop member 12 and the stop during operation of the motor 100, preventing significant displacement changes due to external forces or vibration. This stable limiting action helps improve the reliability and stability of the motor 100 and reduces the probability of failures caused by inaccurate limiting.

[0108] Furthermore, positioning the stop structures 21 on the two inner cores 221 disperses the force acting on the stop during rotation of the rotor assembly 1. When the rotor assembly 1 rotates to its limit position and contacts the stop, the force is transferred to the first inner core 2211 and the second inner core 2212, respectively. This force distribution reduces the stress on a single inner core 221 and improves the overall strength and durability of the stator core 22.

[0109] Regarding the limiting member 12 , further, the limiting member 12 is a magnetic steel member.

[0110] With such a setting, on the one hand, since the magnetic steel part has strong magnetism, it can generate magnetic adsorption force with the corresponding parts on the stator assembly 2. Therefore, during the operation of the motor 100, this magnetic adsorption force can make the fit between the limit part 12 and the stopping structure 21 on the stator assembly 2 tighter, enhance the stability of the limit, and thus achieve more precise angle control.

[0111] On the other hand, due to the presence of magnetic adsorption force, the contact between the limiter 12 and the stop structure 21 can be softer, which is conducive to reducing mechanical wear and extending the service life of the motor 100. At the same time, reducing mechanical wear can not only reduce the noise during the operation of the motor 100, but also improve the working efficiency of the motor 100.

[0112] Regarding the number of the limiting protrusions 122 , in an optional embodiment, a plurality of limiting protrusions 122 are provided between the first stopping portion 211 and the second stopping portion 212 in one stopping structure 21 .

[0113] When there are multiple limiting protrusions 122, each contact between the limiting protrusion 122 and the stop structure 21 corresponds to a smaller rotation angle range, which can further fine-tune the rotation angle range of the rotor assembly 1. In this way, in applications where precise adjustment of the rotation angle is required, the rotation angle of the rotor assembly 1 can be precisely adjusted according to specific needs, thereby improving the operating accuracy of the motor 100.

[0114] In this embodiment, two, three or more limiting protrusions 122 can be provided between the first stopping portion 211 and the second stopping portion 212 in a stopping structure 21. The number of limiting protrusions 122 can be set flexibly. Specifically, it can be set according to actual needs. This embodiment does not make any specific restrictions on this.

[0115] Example 2

[0116] The present application also provides an electric toothbrush, such as Figure 5 and Figure 6As shown, the electric toothbrush includes a motor 100, a toothbrush head 200, and a handle 300. The motor 100 has the same structure as any of the motors 100 in the aforementioned embodiments and can provide the same or similar beneficial effects. For details, please refer to the description of the aforementioned embodiments, and this embodiment will not be repeated here. The motor 100 is disposed within the handle 300, and the rotor assembly 1 is drivingly connected to the toothbrush head 200.

[0117] In the present application, since the rotor assembly 1 in the motor 100 can rotate within a preset angle range, when the motor 100 is applied to an electric toothbrush, the rotor assembly 1 is connected to the toothbrush head in a transmission manner. In this way, driven by the rotor assembly 1, the toothbrush head can not only clean the oral cavity by vibration, but also swing within a preset angle range, thereby expanding the coverage range of the toothbrush head when cleaning the oral cavity, allowing the user to reduce the missed areas during the process of cleaning the oral cavity, thereby improving the cleaning effect.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A motor, characterized in that: include: a rotor assembly, the rotor assembly being rotatably arranged about its own rotation axis and in a first direction, and a limiting member being provided on the rotor assembly; A stator assembly is sleeved on the outside of the rotor assembly, and a stopping structure is provided on the stator assembly. The stopping structure includes a first stopping portion and a second stopping portion spaced apart in the first direction. The limiting member cooperates with the first stopping portion and the second stopping portion in limiting positioning in the first direction to allow the rotor assembly to rotate within a preset angle range.

2. The motor according to claim 1, characterized in that The rotor assembly also includes a rotor shaft, and the limiting member includes a limiting sleeve sleeved on the rotor shaft and a limiting protrusion protruding from the outer peripheral wall of the limiting sleeve, the limiting protrusion is located between the first stop portion and the second stop portion, and the limiting protrusion cooperates with the first stop portion and the second stop portion to limit the position in the first direction.

3. The motor according to claim 2, characterized in that The stopping structure includes a first stopping structure and a second stopping structure arranged in the first direction, and the limiting member includes two limiting protrusions arranged in the first direction, one of the two limiting protrusions is located between the first stopping portion and the second stopping portion in the first stopping structure, and the other is located between the first stopping portion and the second stopping portion in the second stopping structure.

4. The motor according to claim 3, characterized in that The direction perpendicular to the extension direction of the central axis of the limiting sleeve is the second direction, and the two limiting protrusions are respectively provided on both sides of the limiting sleeve; The two limiting protrusions are arranged opposite to each other in the second direction; or, the two limiting protrusions are staggered in the second direction.

5. The motor according to any one of claims 2 to 4, characterized in that: The extending direction of the rotation axis of the rotor assembly is a third direction; The limiting member includes a first limiting member and a second limiting member, and in the third direction, the first limiting member and the second limiting member are respectively arranged at two ends of the rotor assembly.

6. The motor according to claim 5, characterized in that In the third direction, the limiting protrusions on the first limiting member are aligned one by one with the limiting protrusions on the second limiting member; or, in the third direction, at least one limiting protrusion on the first limiting member is staggered with the limiting protrusion on the second limiting member.

7. The motor according to claim 5, characterized in that The limiting protrusions on the first limiting member are connected to the limiting protrusions on the second limiting member in a one-to-one correspondence.

8. The motor according to any one of claims 2 to 4, characterized in that: The extending direction of the rotation axis of the rotor assembly is a third direction; The limiting protrusion is a strip-shaped protrusion whose length direction extends along the third direction.

9. The motor according to any one of claims 2 to 4, characterized in that: The stator assembly includes a stator core and a winding frame arranged on the stator core. A coil is arranged on the winding frame. The stopping structure is arranged on the stator core.

10. The motor according to claim 9, characterized in that The limiting member is arranged on the inner side of the winding frame, the stator core includes an inner core arranged between the winding frame and the limiting sleeve, and the stopping structure is arranged on the inner core.

11. The motor according to claim 10, characterized in that The inner iron core includes a first inner iron core and a second inner iron core that are spaced apart and adjacent to each other in the first direction, one end of the first inner iron core in the first direction is a first end, and one end of the second inner iron core in the first direction adjacent to the first end is a second end, the first stop portion is provided at the first end, and the second stop portion is provided at the second end.

12. The motor according to any one of claims 2 to 4, characterized in that: The limiting component is a magnetic steel component.

13. The motor according to any one of claims 2 to 4, characterized in that: A plurality of the limiting protrusions are provided between the first stopping portion and the second stopping portion in one of the stopping structures.

14. An electric toothbrush, characterized in that: include: Toothbrush head; handle; The motor according to any one of claims 1 to 13, wherein the motor is arranged in the handle, and the rotor assembly is transmission-connected to the toothbrush head.

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