Electric toothbrush

Abstract

The utility model provides an electric toothbrush, and relates to the technical field of electric toothbrushes. The first driving mechanism comprises a first stator assembly and a rotor assembly, the rotor assembly comprises an output shaft connected with the brush head, and the first stator assembly enables the output shaft to rotate through magnetic field changes. The motor shell covers at least part of the first driving mechanism. The rotary positioning assembly comprises a positioning magnet and a Hall element, and the positioning magnet is fixed relative to the output shaft; the output shaft drives the positioning magnet to rotate, and the Hall element confirms the rotation angle of the output shaft by recognizing the rotation position of the positioning magnet. The second driving mechanism comprises a shaft moving magnet and a second stator assembly, the shaft moving magnet is fixed relative to the output shaft, and the second stator assembly enables the shaft moving magnet to move in the axial direction of the output shaft through magnetic field changes and enables the shaft moving magnet to drive the output shaft to move in the axial direction. The distance between the positioning magnet and the Hall element is smaller than the distance between the shaft moving magnet and the Hall element. The electric toothbrush can solve the problem that an existing brush head swings at a large angle, and the precision of the rotating angle of the brush head is affected.

Description

Technical Field

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

[0002] As people's living standards improve, oral cleaning appliances such as electric toothbrushes are widely welcomed as electronic products for personal care. Usually, an electric toothbrush may include a motor and a brush head. The motor may be connected to the brush head via an output shaft, so that the motor drives the brush head to vibrate, thereby cleaning the user's oral cavity.

[0003] The motor drives the output shaft to rotate, which can drive the brush head to rotate within a certain range. The brush head can perform high-frequency reciprocating motion under the driving action of the output shaft, so that the brush head can reciprocate within a certain angle range. Among them, the range of the brush head rotation angle can affect the user experience and the cleaning effect on the oral cavity. In the related technology, a physical structure is usually used to limit the rotation angle of the output shaft.

[0004] However, when the brush head needs to achieve a large-angle swing, due to the increase in the rotation angle, the physical structures are prone to bear greater mechanical stress during the process of mutual restriction, which can easily cause wear and deformation between the restriction structures, which can easily affect the accuracy of the rotation angle on the one hand, and on the other hand, the material requirements of the restriction structure are relatively high. In addition, during the large-angle rotation process, the restriction structures collide with each other, which can easily produce abnormal noises and affect the user experience. Utility Model Content

[0005] The present application provides an electric toothbrush which can solve the problem in the related art that the brush head swings at a large angle, which easily affects the accuracy of the rotation angle of the brush head.

[0006] In one aspect, the present application provides an electric toothbrush, comprising a motor, wherein the motor comprises:

[0007] A first driving mechanism includes a first stator assembly and a rotor assembly, wherein the rotor assembly includes an output shaft, and the first stator assembly can cause the output shaft to rotate around an axis by changing a magnetic field; the output shaft is connected to the brush head;

[0008] A motor housing, at least housing a portion of the first driving mechanism;

[0009] A rotation positioning assembly, comprising a positioning magnet and a Hall element, wherein the positioning magnet is fixed relative to the output shaft; when the output shaft rotates, the positioning magnet can be driven to rotate, and the Hall element can confirm the rotation angle of the output shaft by identifying the rotation position of the positioning magnet;

[0010] The second driving mechanism includes an axially movable magnet and a second stator assembly. The axially movable magnet is fixedly arranged relative to the output shaft. The second stator assembly can cause the axially movable magnet to move axially along the output shaft through a magnetic field change, and cause the axially movable magnet to drive the output shaft to move axially;

[0011] Wherein, the distance between the positioning magnet and the Hall element is less than the distance between the axially movable magnet and the Hall element.

[0012] For the electric toothbrush provided in this application, the first stator assembly can drive the output shaft to rotate around its own axis through a magnetic field change, and then drive the toothbrush head on the output shaft to rotate. The first driving mechanism realizes the up-and-down height rotation of the toothbrush head relative to the teeth, that is, vibration, so as to clean the teeth in the first dimension direction;

[0013] The rotation positioning assembly can be used to limit the rotation angle of the output shaft around its own axis. Among them, the positioning magnet and the output shaft can rotate synchronously, and the Hall element and the output shaft do not rotate synchronously. When the output shaft drives the positioning magnet to rotate synchronously to the expected angle, the Hall element can confirm the expected rotation angle by detecting the rotation position of the positioning magnet. This method enables the electric toothbrush to realize the control of the toothbrush rotation electronically, and the rotation angle of the toothbrush head is more accurate and the control is more rapid compared with the physical limit structure; and through this method of angle control, the output shaft of the electric toothbrush is allowed to rotate at a large angle, and the angle formed by the two extreme rotation positions of the output shaft is allowed to be greater than 30°, such as 30°, 40°, 50°, 60°, etc., to meet the usage requirements of users in various situations;

[0014] In summary, in the embodiment of this application, the Hall element can be used to sense and identify the position of the positioning magnet to limit the rotation angle of the output shaft. During the rotation of the output shaft, the Hall element and the positioning magnet do not directly contact. Therefore, during the large-angle rotation of the output shaft, since there is no direct contact between the Hall element and the positioning magnet, the Hall element and the positioning magnet are not easily subjected to large mechanical stresses, and thus are not easily worn and deformed, which is beneficial to the realization of the high-precision rotation and the reliability of the large-angle rotation of the output shaft;

[0015] In the second driving mechanism, the second stator assembly can drive the axially movable magnet to move axially along the output shaft through a magnetic field change. Since the axially movable magnet and the output shaft move synchronously, the axially movable magnet can drive the output shaft to move axially synchronously along the output shaft, so that the output shaft can drive the toothbrush head to reciprocate axially along its own axis. The second driving mechanism realizes the lateral movement of the toothbrush head relative to the teeth, and then cleans the teeth in the second dimension;

[0016] It should be noted that the rotation positioning component drives the positioning magnet to drive the output shaft to rotate, and the second driving mechanism drives the shaft moving magnet to drive the output shaft to move along the axial direction of the output shaft. These two movement modes can be independent of each other and move separately, or can move simultaneously to form a composite movement. In other words, during the process of the rotation positioning component driving the positioning magnet to drive the output shaft to rotate, it is not easy to interfere with the axial movement of the output shaft. Moreover, during the process of the second driving mechanism driving the shaft moving magnet to drive the output shaft to move along the axial direction of the output shaft, it is not easy to interfere with the rotation of the output shaft;

[0017] Therefore, through the rotation positioning component and the second driving mechanism, the output shaft can achieve a large-angle rotation around its own axis, and can also achieve a reciprocating movement along its own axis, thereby more effectively increasing the contact area between the brush head and the oral cavity, which is beneficial to improving the cleaning effect;

[0018] At the same time, since both the positioning magnet and the shaft moving magnet have magnetism, and the Hall element can identify the magnet, therefore, by setting the distance between the positioning magnet and the Hall element to be less than the distance between the shaft moving magnet and the Hall element, the positioning magnet can be closer to the Hall element relative to the shaft moving magnet, thereby reducing the interference of the shaft moving magnet on the Hall element detecting the rotation angle of the output shaft, ensuring that the electric toothbrush has dual movements of rotation and axial movement, and further ensuring that the precise angle detection function is not damaged, which is beneficial to use.

[0019] In addition, in the embodiment of the present application, the Hall element identifies the positioning magnet to confirm the rotation angle of the output shaft. Therefore, there is no mechanical structure limit between the Hall element and the positioning magnet. When the motor is not powered on, the output shaft can rotate 360° along its own axis. Users can independently adjust the position of the brush head according to their usage habits.

[0020] According to an embodiment of the present application, the positioning magnet is located between the Hall element and the shaft moving magnet.

[0021] With such a setting, since the positioning magnet is located between the Hall element and the shaft moving magnet, the distance between the positioning magnet and the Hall element must be less than the distance between the shaft moving magnet and the Hall element, which greatly facilitates the assembly of the electric toothbrush, that is, when assembling, there is no need to deliberately pay attention to the installation distance between the positioning magnet and the shaft moving magnet. By sequentially installing the positioning magnet and the shaft moving magnet, good reliability of the rotation angle control can be ensured; it is beneficial to reduce the interference caused by the shaft moving magnet to the Hall element.

[0022] According to an embodiment of the present application, the distance between the positioning magnet and the Hall element is less than the distance between the positioning magnet and the shaft moving magnet.

[0023] In this way, by setting the distance between the positioning magnet and the shaft-moving magnet to be greater than the distance between the positioning magnet and the Hall element, the shaft-moving magnet can be further away from the Hall element, preventing the magnetic field of the shaft-moving magnet and the magnetic field of the positioning magnet from influencing each other, thereby more effectively reducing the interference of the shaft-moving magnet on the recognition of the Hall element; at the same time, the positioning magnet is closer to the Hall element, which is conducive to accurately detecting the rotation angle of the output shaft. According to one embodiment of the present application, the Hall element is located between the positioning magnet and the shaft-moving magnet, and the Hall element faces the side of the positioning magnet.

[0024] In this way, by setting the Hall element toward the positioning magnet, the accuracy of the Hall element in identifying the positioning magnet can be improved. In addition, the shaft moving magnet is located on the side opposite to the positioning magnet, that is, the shaft moving magnet is relatively away from the detection side of the Hall element, which can further reduce the interference caused by the shaft moving magnet on the Hall element recognition.

[0025] According to one embodiment of the present application, along the axial direction of the output shaft, the spacing distance between the positioning magnet and the Hall element is 1.5 mm-3 mm.

[0026] In this way, the distance between the positioning magnet and the Hall element can affect the Hall element's recognition of the positioning magnet. When the distance between the positioning magnet and the Hall element is greater than 3 mm, it is easy for the Hall element to have difficulty in recognizing the position of the positioning magnet, which can easily affect the accuracy of the rotation angle recognition. This range is conducive to the design of an electric toothbrush with a small volume and bidirectional motion of rotation and axial movement.

[0027] There is an installation tolerance during the motor installation process, and the Hall element remains stationary during the synchronous rotation of the positioning magnet and the output shaft, so that the positioning magnet can rotate relative to the Hall element. Therefore, when the distance between the positioning magnet and the Hall element is less than 1.5mm, it is easy for the positioning magnet to collide with the Hall element, resulting in the possibility of failure.

[0028] In summary, the above technical problems can be effectively solved by setting the spacing distance between the positioning magnet and the Hall element to 1.5mm-3mm.

[0029] According to one embodiment of the present application, the motor further includes a control board, and the Hall element is arranged on a side of the control board facing the shaft moving magnet;

[0030] The number of the Hall elements is two, and the two Hall elements are arranged at intervals along the circumference of the electric toothbrush.

[0031] With such a setting, the Hall element can have an induction positioning function. When an electrical signal enters the control board, the Hall element located on the control board can interact with the positioning magnet to identify the rotational position of the positioning magnet through the Hall element, thereby limiting the rotational angle of the output shaft.

[0032] Among them, the number of Hall elements is two, and the two Hall elements are arranged at intervals along the circumferential direction of the electric toothbrush. The two Hall elements can be used to limit the rotational angle of the output shaft. When the positioning magnet rotates to correspond to different Hall elements, different voltage values can be generated to determine the position of the positioning magnet through the voltage values, so that the control board can send a signal through the position of the positioning magnet to drive the output shaft to rotate forward or backward.

[0033] According to an embodiment of the present application, the included angle n formed by the connection lines of the two Hall elements and the axis of the output shaft is less than or equal to 90°.

[0034] In the embodiment of the present application, the positions of the two Hall elements can be used to control the rotational angle of the output shaft, so that the output shaft can rotate forward or backward within a range of 90°, such as 30°, 40°, 50°, 60°, etc., thereby realizing a large-angle rotation of the output shaft and increasing the contact area between the brush head and the oral cavity.

[0035] It should be noted that the included angle n formed by the connection lines of the two Hall elements and the axis of the output shaft can be used to control the maximum rotational angle of the output shaft. When the included angle n formed by the connection lines of the two Hall elements and the axis of the output shaft is greater than 90°, the angle of reciprocating rotation of the brush head in the oral cavity is too large, and the vibration sensation generated by the brush head is also greater, which is likely to damage the teeth and gums and affect the user experience.

[0036] According to an embodiment of the present application, the motor further includes a positioning member fixed to the output shaft, and the positioning member sleeves the output shaft and abuts against adjacent components for positioning;

[0037] Among them, the positioning member includes a first positioning portion and a second positioning portion connected to each other. The diameter of the first positioning portion is greater than the diameter of the second positioning portion. The positioning magnet sleeves the second positioning portion and abuts against the first positioning portion for positioning, and the positioning magnet is fixed to the second positioning portion.

[0038] With such a setting, the positioning magnet can be fixed to the output shaft through the positioning member to facilitate the positioning and installation of the positioning magnet. During the installation process of the positioning magnet, the positioning member can abut against adjacent components to install the positioning member. Then, the positioning magnet can be sleeved on the positioning member, that is, the installation and positioning of the positioning magnet are completed.

[0039] Specifically, by setting the diameter of the first positioning portion of the positioning member to be larger than that of the second positioning portion, a limiting step can be formed between the first positioning portion and the second positioning portion. The positioning magnet can be sleeved on the second positioning portion with a smaller diameter, and the positioning magnet can be pushed against the first positioning portion to limit the positioning magnet, facilitating installation.

[0040] According to an embodiment of the present application, the axially movable magnet is sleeved on the end of the output shaft away from the brush head, and the axially movable magnet abuts against the second positioning portion for positioning.

[0041] With such a setting, the axially movable magnet is installed at the end of the output shaft away from the brush head. Compared with the axially movable magnet being arranged in the middle or other positions of the output shaft, this can enable the motor of the electric toothbrush to not be changed too much, reduce the re-opening of molds, and further greatly reduce costs, thereby obtaining better economic benefits. At the same time, the axially movable magnet realizes installation and positioning by abutting against the second positioning portion, which further facilitates assembly, and enables the positioning member to not only position the positioning magnet but also position the axially movable magnet, realizing multiple functions through a simple structure, which is beneficial to the design of a miniaturized electric toothbrush and further beneficial to enhancing the competitiveness of the product.

[0042] According to an embodiment of the present application, the second driving mechanism is arranged at the end of the output shaft away from the brush head.

[0043] With such a setting, the rotating positioning assembly can be located on the side of the axially movable magnet facing the brush head. During the installation of the motor, the rotating positioning assembly can be installed first, and then the second driving mechanism can be installed. The second stator assembly can be provided with a coil so that when the motor is powered on, current can pass through the coil to generate a magnetic field. Since the process of arranging and winding the coil is relatively complex, by arranging the axially movable magnet at the end away from the brush head, an operating space can be provided for winding the coil of the second stator assembly, reducing the assembly difficulty and improving the assembly efficiency.

[0044] Moreover, it is easy to understand that when the motor is powered on, the first stator assembly can drive the output shaft to rotate through the change of the magnetic field, and the second stator assembly can drive the output shaft to move axially along its own axis. Therefore, if the second driving mechanism is arranged between the rotating positioning assembly and the first driving mechanism, the magnetic fields of the first stator assembly and the second stator assembly will interfere with each other, thus easily affecting the movement direction of the output shaft.

[0045] In addition, by arranging the axially movable magnet at the end of the output shaft away from the brush head, the structure such as the motor housing does not need to be damaged during the product optimization process, so that under the condition of realizing the rotation and axial movement of the output shaft, the product optimization cost can be reduced.

[0046] According to an embodiment of the present application, the motor further includes a fixing bracket fixedly disposed at an end of the motor away from the brush head;

[0047] Wherein, the output shaft extends into the fixing bracket, the second stator assembly is disposed in the fixing bracket, and at least a part of the shaft moving magnet is located within the fixing bracket.

[0048] With such a setting, when the shaft moving magnet is located at an end of the output shaft away from the brush head, the second stator assembly can be fixed by the fixing bracket. The fixing bracket is also correspondingly disposed at an end of the output shaft away from the brush head. Therefore, during the installation of the motor, installing the fixing bracket and the second driving mechanism at the end of the output shaft can reduce the installation difficulty and is not easy to damage the structure of the motor housing, which is beneficial to reducing the assembly cost.

[0049] According to an embodiment of the present application, the fixing bracket is screwed to an end of the motor housing away from the brush head.

[0050] With such a setting, during the axial movement of the output shaft, the shaft moving magnet is fixed relative to the output shaft to move axially synchronously with the output shaft. The fixing bracket can be used to fix the second stator assembly. By connecting the fixing bracket to the motor housing, the fixing bracket can be kept stationary so that during the axial movement of the shaft moving magnet, the second stator assembly can remain stationary and the second stator assembly and the output shaft do not move synchronously.

[0051] The fixing bracket and the motor housing can be connected by screwing. Since the output shaft has dual movements of rotation and axial movement, the vibration of the motor of the electric toothbrush is relatively large. The screwing connection between the fixing bracket and the motor housing can increase the connection stability between the fixing bracket and the motor housing, and the anti-vibration ability is stronger, which is beneficial to reducing the noise generated by the motor.

[0052] According to an embodiment of the present application, the number of the shaft moving magnets is odd, and the magnetic properties of any two adjacent shaft moving magnets are opposite.

[0053] With such a setting, the number of the shaft moving magnets can be used to set the displacement of the output shaft moving axially. The more the number of the shaft moving magnets, the greater the displacement that the output shaft can be driven to move axially by the shaft moving magnets. Among them, the number of the shaft moving magnets can be set to be odd to meet the displacement requirement of the axial movement of the output shaft.

[0054] It is easy to understand that the more the number of the shaft moving magnets, the larger the space occupied by the shaft moving magnets along the axial direction of the output shaft in the motor, and the greater the weight of the motor, which is likely to cause the electric toothbrush to be larger in size and heavier in weight, affecting the user experience.

[0055] Exemplarily, the number of axially movable magnets can be three. The three axially movable magnets can meet the displacement requirements of the axial movement of the output shaft, so that the brush head can have a better cleaning effect. Moreover, the three axially movable magnets occupy a smaller space size in the axial direction and have reasonable weight parameters, which is beneficial to realizing the portability of the electric toothbrush.

[0056] According to an embodiment of the present application, a reset member and a bearing are further provided in the motor housing. The outer side of the bearing is fixed to the reset member, the bearing is sleeved on the output shaft, and the side of the reset member close to the motor housing is fixed relative to the motor housing;

[0057] Wherein, the bearing allows the output shaft to rotate relative to the reset member. When the axially movable magnet drives the output shaft to move axially, the output shaft causes the reset member to deform through the bearing, so as to further enable the reset member to reset the axial movement of the output shaft.

[0058] With such a setting, the inner side of the reset member can be connected to the output shaft through the bearing. Therefore, during the rotation of the output shaft, the output shaft and the reset member do not rotate synchronously. The control board can be arranged on the reset member so that the Hall element on the control board and the output shaft can also rotate out of sync.

[0059] When the output shaft moves axially, the bearing and the output shaft can move synchronously. Since the side of the reset member close to the motor housing is relatively fixed, the reset member can generate elastic deformation, and the control board can be driven to move synchronously during the deformation process of the reset member, so that the distance between the Hall element and the positioning magnet along the axial direction of the output shaft is constant, thereby ensuring that the distance between the Hall element and the positioning magnet hardly changes, and further ensuring that the function of the Hall element to identify the positioning magnet is not damaged.

[0060] According to an embodiment of the present application, a clamping portion is provided in the motor housing, and the reset member abuts against the clamping portion to fix the reset member relative to the motor housing.

[0061] With such a setting, the clamping portion provided in the motor housing can be used to axially position the reset member. Thus, when the output shaft moves axially, the side of the reset member close to the motor housing can be fixed relative to the motor housing. By forming the clamping portion on the motor housing, other redundant structures are avoided, which is beneficial to reducing the volume of the electric toothbrush.

[0062] In a second aspect, an electric toothbrush provided by the present application includes a motor, and the motor includes:

[0063] A first driving mechanism, including a first stator assembly and a rotor assembly. The rotor assembly includes an output shaft, and the first stator assembly can make the output shaft rotate through a magnetic field;

[0064] An output shaft has a first end and a second end which are oppositely arranged, and the first end is used for connecting with a brush head;

[0065] A rotation positioning assembly includes a positioning magnet and a Hall element, and the positioning magnet and the Hall element are arranged at intervals;

[0066] A fixing seat is fixedly arranged on the output shaft, and the positioning magnet is adhesively connected to the fixing seat;

[0067] Wherein, when the output shaft rotates, it can drive the fixing seat to rotate, the fixing seat rotates to drive the positioning magnet to rotate, and the Hall element can identify the rotation position of the positioning magnet to confirm the rotation angle of the output shaft.

[0068] In the embodiment of the present application, the position of the positioning magnet can be sensed and identified by the Hall element to limit the rotation angle of the output shaft. During the rotation of the output shaft, there is no direct contact between the Hall element and the positioning magnet. Therefore, when it is necessary to realize a large-angle rotation of the output shaft, since there is no direct contact between the Hall element and the positioning magnet, the Hall element and the positioning magnet are not easily subjected to large mechanical stresses, and thus are not easily worn and deformed, which is beneficial to realizing the high-precision rotation and the reliability of the large-angle rotation of the output shaft.

[0069] Wherein, the fixing seat can be used to fix the positioning magnet on the output shaft so that the positioning magnet can move synchronously with the output shaft through the fixing seat. It should be noted that the synchronous movement includes rotation around the axis of the output shaft and movement along the axial direction of the output shaft.

[0070] Moreover, in the embodiment of the present application, the positioning magnet and the fixing seat are adhesively connected. Since the positioning magnet has a relatively high brittleness, compared with other connection methods, the adhesive connection can enable the positioning magnet to be basically not affected or only slightly affected by the applied force during the installation process, further preventing the positioning magnet from cracking. Therefore, the positioning magnet can be protected from being damaged by external forces through the bonding method. And the bonding method is also not likely to affect the magnetism of the positioning magnet and reduce the interference of the Hall element in identifying the positioning magnet.

[0071] According to an embodiment of the present application, the positioning magnet is in a circular ring shape with a positioning hole provided on the inner side, the positioning hole is sleeved on the fixing seat, and at least part of one side of the positioning magnet is attached and adhesively connected to the fixing seat, and the diameter of the positioning hole is larger than the diameter of the sleeved part of the fixing seat.

[0072] With such a setting, since the diameter of the positioning hole of the positioning magnet is larger than the diameter of the sleeved portion of the fixing base, during the process of installing the positioning magnet on the fixing base, the sleeved portion of the fixing base will basically not generate friction or an outward expanding force on the positioning magnet. That is to say, the positioning magnet will basically not be subjected to an external force, or the external force applied to the positioning magnet is small, and it is relatively easy to sleeved the positioning magnet on the fixing base, thereby reducing the possibility of damage to the positioning magnet due to the acting force. Of course, since the positioning magnet and the fixing base are fixed by gluing, due to the relatively large diameter of the positioning hole, this allows part of the glue to penetrate between the sleeved portion of the fixing base and the positioning magnet, and this situation will basically not generate a force that damages the positioning magnet.

[0073] According to an embodiment of the present application, the fixing base is a copper fixing base.

[0074] With such a setting, the fixing base can be a copper fixing base. On the one hand, the fixing base made of copper can not easily affect the magnetism of the directional magnet. On the other hand, the hardness of the copper material is relatively low, which can reduce the damage or destruction of the directional magnet caused by the fixing base when the directional magnet is installed on the fixing base.

[0075] According to an embodiment of the present application, the fixing base includes a sleeved portion and a fixing portion, and the fixing portion extends circumferentially around the sleeved portion;

[0076] Wherein, the sleeved portion is fixed relative to the output shaft, the positioning hole is sleeved on the sleeved portion, and at least part of one side of the positioning magnet is glued to the fixing portion.

[0077] With such a setting, the positioning magnet can be sleeved on the sleeved portion through the positioning hole. The fixing portion extends circumferentially around the sleeved portion. Further, one side of the positioning magnet is adhesively connected to the fixing portion. The fixing base with such a structure facilitates the positioning and fixing of the positioning magnet, and the positioning magnet has good connection stability and is not easily damaged.

[0078] According to an embodiment of the present application, the fixing portion is provided with a through hole.

[0079] In the embodiment of the present application, before the positioning magnet is installed on the fixing base, along the axial direction of the output shaft, a colloid can be provided on the surface of the fixing portion facing the positioning magnet. Then, the positioning magnet is sleeved on the sleeved portion through the positioning hole. When the positioning magnet and the fixing portion are in mutual contact, the colloid can be extruded so that the colloid can be evenly distributed between the positioning magnet and the fixing portion. The colloid overflowing when the positioning magnet and the fixing portion are in mutual contact can enter the through hole. The positioning magnet and the through hole can form a space for accommodating the colloid, so as to reduce the amount of colloid overflowing along the radial direction of the output shaft, thereby reducing the possibility that the colloid overflows and adheres to other structures, affecting the transmission of the internal structure of the motor, and further affecting the normal movement of the output shaft.

[0080] According to an embodiment of the present application, there is no metal shielding between the positioning magnet and the Hall element.

[0081] With such a setting, since metal materials are likely to affect the accuracy of the Hall element's recognition of the positioning magnet, in the embodiments of the present application, by setting no metal shielding between the positioning magnet and the Hall element, the accuracy of the Hall element's recognition of the position of the positioning magnet is improved, thereby improving the accuracy of controlling the rotation angle of the output shaft.

[0082] In addition to the technical problems solved by the embodiments of the present utility model described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features of the technical solutions, the other technical problems that the electric toothbrush provided by the embodiments of the present utility model can solve, the other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application and used together with the specification to explain the principles of the present application.

[0084] Figure 1 Schematic perspective view of a motor according to an embodiment of the present application;

[0085] Figure 2 Exploded structural view of a motor according to an embodiment of the present application;

[0086] Figure 3 Cross-sectional structural view of a motor according to an embodiment of the present application;

[0087] Figure 4 is Figure 3 Enlarged view of part A in

[0088] Figure 5 Partial test structural view of a motor according to an embodiment of the present application;

[0089] Figure 6 is Figure 3 Enlarged view of part B in

[0090] Figure 7 Partial structural view of a motor according to another embodiment of the present application;

[0091] Figure 8 Exploded partial structural view of a motor according to another embodiment of the present application.

[0092] Description of reference numerals:

[0093] 100 - motor; 101 - positioning sleeve

[0094] 110 - First driving mechanism; 111 - First stator assembly; 112 - Rotor assembly;

[0095] 1121 - Output shaft; 120 - Motor housing; 121 - Clamping part;

[0096] 130 - Rotating positioning assembly; 131 - Positioning magnet; 132 - Hall element;

[0097] 1321 - First Hall element; 1322 - Second Hall element; 140 - Second driving mechanism;

[0098] 141 - Axially moving magnet; 1411 - First magnet; 1412 - Second magnet;

[0099] 1413 - Third magnet; 142 - Second stator assembly; 150 - Control board;

[0100] 160 - Positioning part; 161 - First positioning portion; 162 - Second positioning portion;

[0101] 170 - Fixed bracket; 180 - Reset member; 190 - Bearing;

[0102] 200 - Fixed seat; 210 - Sleeve portion; 220 - Fixing portion;

[0103] 220a - Through hole; 220b - Positioning hole; X - Axial direction.

[0104] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Description of the Embodiment

[0105] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. 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. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. Obviously, the described embodiments are some embodiments of the present application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0106] As a tool for cleaning the oral cavity, electric toothbrushes can promote blood circulation in the oral cavity by driving the brush head to vibrate at a high frequency through a motor, thereby improving the cleaning effect of the oral cavity and having a certain massage effect on the gum tissue. In addition, the high-frequency vibration of the brush head can also break down the cleaning toothpaste into fine foam. The fine foam can deeply clean the gaps between teeth and can more effectively improve the cleaning effect of the oral cavity.

[0107] The motor can be connected to the brush head through an output shaft. The motor drives the output shaft to rotate, which can drive the brush head to rotate within a certain range. The brush head can perform high-frequency reciprocating motion under the driving action of the output shaft, so that the brush head can reciprocate within a certain angle range.

[0108] In the related art, the output shaft is usually driven by a motor to rotate so that the brush head vibrates. Among them, the range of the brush head rotation angle can affect the user experience and the cleaning effect on the oral cavity. When the brush head of the electric toothbrush swings at a larger angle, the contact area between the brush head and the oral cavity can be increased, the cleaning effect can be improved, and thus the user experience can be improved.

[0109] However, in the related art, the rotation angle of the output shaft is usually limited by the mutual support of physical structures. When the output shaft swings at a large angle, due to the increase in the rotation angle, the physical structures are prone to bear greater mechanical stress during the mutual limitation process, resulting in wear and deformation between the limiting structures. On the one hand, it is easy to affect the limiting accuracy, thereby affecting the accuracy of the rotation angle. On the other hand, the wear resistance and other material properties of the limiting structure are required to be high, which is easy to increase the cost. In addition, during the large-angle rotation process, the limiting structures collide with each other, which is easy to produce abnormal noise, affecting the user experience.

[0110] Based on the above technical problems, the applicant has improved the structure of the existing electric toothbrush. The electric toothbrush provided by the present application is described below with reference to the accompanying drawings and in combination with specific embodiments.

[0111] Figure 1 A schematic diagram of the three-dimensional structure of a motor 100 of an electric toothbrush provided in the present application; Figure 2 A schematic diagram of the exploded structure of a motor 100 of an electric toothbrush provided in the present application; Figure 3 A schematic cross-sectional view of a motor 100 of an electric toothbrush provided in the present application; Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 5 A schematic diagram of a partial side view of a motor 100 of an electric toothbrush provided in the present application; Figure 6 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0112] See also Figures 1 to 4As shown, the electric toothbrush of the embodiment of the present application includes a motor 100. The motor 100 may include a first driving mechanism 110, a motor housing 120, a rotation positioning assembly 130, and a second driving mechanism 140.

[0113] The first driving mechanism 110 may include a first stator assembly 111 and a rotor assembly 112. The rotor assembly 112 includes an output shaft 1121. The first stator assembly 111 can cause the output shaft 1121 to rotate around the axis through magnetic field changes. The output shaft 1121 can be used to connect to the toothbrush head.

[0114] In the embodiment of the present application, the motor 100 can be used to convert electrical energy into mechanical energy to achieve the rotational movement of the rotor, so that the output shaft 1121 can drive the toothbrush head to move.

[0115] Specifically, the first stator assembly 111 may have winding coils. The rotor assembly 112 may be located inside the first stator assembly 111. When the motor 100 is powered on, current can pass through the winding coils to generate a rotating magnetic field. The rotating magnetic field and the rotor assembly 112 can interact with each other and generate an electromagnetic force to push the rotor assembly 112 to rotate, thereby realizing the rotation of the output shaft 1121.

[0116] The motor housing 120 can at least cover a part of the first driving mechanism 110. The rotation positioning assembly 130 includes a positioning magnet 131 and a Hall element 132. The positioning magnet 131 is fixed relative to the output shaft 1121. When the output shaft 1121 rotates, it can drive the positioning magnet 131 to rotate. The Hall element 132 can confirm the rotation angle of the output shaft 1121 by identifying the rotation position of the positioning magnet 131.

[0117] The second driving mechanism 140 includes an axially moving magnet 141 and a second stator assembly 142. The axially moving magnet 141 is fixedly arranged relative to the output shaft 1121. The second stator assembly 142 can cause the axially moving magnet 141 to move along the axial direction X of the output shaft through magnetic field changes, and cause the axially moving magnet 141 to drive the output shaft 1121 to move along the axial direction X. Wherein, the distance between the positioning magnet 131 and the Hall element 132 can be less than the distance between the axially moving magnet 141 and the Hall element 132.

[0118] In the embodiment of the present application, the first stator assembly 111 can drive the output shaft 1121 to rotate around its own axis through magnetic field changes, and then drive the toothbrush head on the output shaft 1121 to rotate. The first driving mechanism 110 realizes the up and down height rotation of the toothbrush head relative to the teeth, that is, vibration, so as to clean the teeth in the first dimension direction.

[0119] The rotation positioning assembly 130 can be used to limit the rotation angle of the output shaft 1121 about its own axis. Among them, the positioning magnet 131 and the output shaft 1121 can rotate synchronously, while the Hall element 132 and the output shaft 1121 do not rotate synchronously. When the output shaft 1121 drives the positioning magnet 131 to rotate synchronously to the expected angle, the Hall element 132 can detect the rotation position of the positioning magnet 131 to confirm the expected rotation angle. This method enables the electric toothbrush to achieve control of the toothbrush rotation in electronic control, making the rotation angle of the brush head more accurate and the control more rapid compared to the physical limit structure; and by controlling the angle in this way, it allows the output shaft of the electric toothbrush to rotate at a large angle, and the angle formed by the two extreme rotation positions of the output shaft is allowed to be greater than 30°, such as 30°, 40°, 50°, 60°, etc., to meet the usage requirements of users in various situations.

[0120] In summary, in the embodiments of the present application, the Hall element 132 can sense and identify the position of the positioning magnet 131 to limit the rotation angle of the output shaft 1121. During the rotation of the output shaft 1121, there is no direct contact between the Hall element 132 and the positioning magnet 131. Therefore, during the large-angle rotation of the output shaft 1121, since there is no direct contact between the Hall element 132 and the positioning magnet 131, the Hall element 132 and the positioning magnet 131 are not easily subjected to large mechanical stresses, and thus are not easily worn and deformed, which is beneficial to achieving the high-precision rotation and the reliability of large-angle rotation of the output shaft 1121.

[0121] In the second driving mechanism 140, the second stator assembly 142 can drive the shaft moving magnet 141 to move along the axial direction X of the output shaft through magnetic field changes. Since the shaft moving magnet 141 and the output shaft 1121 move synchronously, the shaft moving magnet 141 can drive the output shaft 1121 to move synchronously along the axial direction X of the output shaft, so that the output shaft 1121 can drive the brush head to reciprocate along its own axial direction X. The second driving mechanism 140 realizes the lateral movement of the brush head relative to the teeth, and further cleans the teeth in the second dimension.

[0122] It should be noted that the rotation positioning assembly 130 drives the positioning magnet 131 to drive the output shaft 1121 to rotate, and the second driving mechanism 140 drives the shaft moving magnet 141 to drive the output shaft 1121 to move along the axial direction X of the output shaft. These two movement modes can be independent of each other and move separately, or can move simultaneously to form a combined movement. In other words, during the process of the rotation positioning assembly 130 driving the positioning magnet 131 to drive the output shaft 1121 to rotate, it is not easy to interfere with the movement of the output shaft 1121 along the axial direction X. And during the process of the second driving mechanism 140 driving the shaft moving magnet 141 to drive the output shaft 1121 to move along the axial direction X of the output shaft, it is not easy to interfere with the rotation of the output shaft 1121.

[0123] Therefore, by rotating the positioning assembly 130 and the second driving mechanism 140, the output shaft 1121 can be rotated at a large angle about its own axis, and reciprocating movement along its own axis X can also be achieved, so that the contact area between the brush head and the oral cavity can be increased more effectively, which is beneficial to improving the cleaning effect.

[0124] At the same time, since both the positioning magnet 131 and the shaft moving magnet 141 have magnetism, and the Hall element 132 can identify the magnet, by setting the distance between the positioning magnet 131 and the Hall element 132 to be less than the distance between the shaft moving magnet 141 and the Hall element 132, the positioning magnet 131 can be made closer to the Hall element 132 relative to the shaft moving magnet 141, thereby reducing the interference of the shaft moving magnet 141 on the Hall element 132 for detecting the rotation angle of the output shaft 1121. While ensuring that the electric toothbrush has dual movements of rotation and axial movement, it further ensures that the precise angle detection function is not damaged, which is beneficial for use.

[0125] In addition, in the embodiment of the present application, the Hall element 132 identifies the positioning magnet 131 to confirm the rotation angle of the output shaft 1121. Therefore, there is no mechanical structure limit between the Hall element 132 and the positioning magnet 131. When the motor 100 is not powered on, the output shaft 1121 can rotate 360° along its own axis. The user can independently adjust the position of the brush head according to their usage habits.

[0126] In some examples, the positioning magnet 131 is fixed relative to the output shaft 1121. The positioning magnet 131 can be directly fixed to the output shaft 1121, or the positioning magnet 131 can be installed on the output shaft 1121 through other structures, which is not limited in this embodiment.

[0127] Moreover, in this embodiment, the fixing method between the positioning magnet 131 and the output shaft 1121 is not limited either. The positioning magnet 131 can be connected by bonding, clamping, screwing, etc.

[0128] In some examples, the shaft moving magnet 141 is fixed relative to the output shaft 1121. The shaft moving magnet 141 can be directly sleeved on the output shaft 1121, or the shaft moving magnet 141 can also be installed on the output shaft 1121 through other adapter structures, which is not limited in this embodiment.

[0129] Moreover, in this embodiment, the fixing method between the shaft moving magnet 141 and the output shaft 1121 is not limited either. The shaft moving magnet 141 can be connected by bonding, clamping, screwing, etc.

[0130] In some feasible ways, referring to Figure 3 and Figure 4 As shown, the positioning magnet 131 of the embodiment of the present application can be located between the Hall element 132 and the shaft moving magnet 141.

[0131] Since the positioning magnet 131 is located between the Hall element 132 and the axially movable magnet 141, the distance between the positioning magnet 131 and the Hall element 132 must be less than the distance between the axially movable magnet 141 and the Hall element 132. This greatly facilitates the assembly of the electric toothbrush, that is, during assembly, there is no need to deliberately pay attention to the installation distance between the positioning magnet 131 and the axially movable magnet 141. By sequentially installing the positioning magnet 131 and the axially movable magnet 141, good reliability of the rotation angle control can be ensured, which is beneficial to reducing the interference caused by the axially movable magnet 141 to the Hall element 132.

[0132] Among them, the motor housing 120 can cover a part of the first driving mechanism 110. After the first driving mechanism 110 is installed on the motor housing 120, along the axial direction X of the output shaft, the rotation positioning assembly 130 and the second driving mechanism 140 can be installed. Among them, the rotation positioning assembly 130 can be sleeved on the output shaft 1121 first, and then the second driving mechanism 140 can be sleeved on the output shaft 1121. Or, the second driving mechanism 140 can also be sleeved on the output shaft 1121 first, and then the rotation positioning assembly 130 can be sleeved on the output shaft 1121. The installation order of the rotation positioning assembly 130 and the second driving mechanism 140 is not limited in this embodiment.

[0133] In some realizable ways, refer to Figure 4 As shown, the distance between the positioning magnet 131 and the Hall element 132 is less than the distance between the positioning magnet 131 and the axially movable magnet 141.

[0134] In the embodiment of the present application, by setting the distance between the positioning magnet 131 and the axially movable magnet 141 to be greater than the distance between the positioning magnet 131 and the Hall element 132, the axially movable magnet 141 can be made farther away from the Hall element 132, preventing the magnetic field of the axially movable magnet 141 from interacting with the magnetic field of the positioning magnet 131, so that the interference caused by the axially movable magnet 141 to the recognition of the Hall element 132 can be more effectively reduced. At the same time, the positioning magnet 131 is closer to the Hall element 132, which is beneficial to accurately detecting the rotation angle of the output shaft 1121.

[0135] In some realizable ways, the Hall element 132 in the embodiment of the present application is located between the positioning magnet 131 and the axially movable magnet 141, and on the side of the Hall element 132 facing the positioning magnet 131.

[0136] In the embodiment of the present application, by setting the Hall element 132 toward the positioning magnet 131, the accuracy of the Hall element 132 in identifying the positioning magnet 131 can be improved. In addition, the shaft-moving magnet 141 is located on the side opposite to the positioning magnet 131, that is, the shaft-moving magnet 141 is relatively away from the detection side of the Hall element 132, which can further reduce the interference caused by the shaft-moving magnet 141 on the recognition of the Hall element 132.

[0137] In some achievable embodiments, along the axial direction X of the output shaft, the spacing distance between the positioning magnet 131 and the Hall element 132 is 1.5 mm to 3 mm.

[0138] In the embodiment of the present application, the distance between the positioning magnet 131 and the Hall element 132 can affect the recognition effect of the Hall element 132 on the positioning magnet 131. When the distance between the positioning magnet 131 and the Hall element 132 is greater than 3 mm, it is easy for the Hall element 132 to have difficulty in recognizing the position of the positioning magnet 131, thereby easily affecting the accuracy of the rotation angle recognition. This range of distance is conducive to the design of an electric toothbrush with a small volume and bidirectional motion of rotation and axial movement.

[0139] The motor 100 has an installation tolerance during installation, and the Hall element 132 remains stationary during the synchronous rotation of the positioning magnet 131 and the output shaft 1121, so that the positioning magnet 131 can rotate relative to the Hall element 132. Therefore, when the distance between the positioning magnet 131 and the Hall element 132 is less than 1.5 mm, the positioning magnet 131 and the Hall element 132 are prone to collide, resulting in the possibility of malfunction.

[0140] In summary, the above technical problems can be effectively solved by setting the spacing distance between the positioning magnet 131 and the Hall element 132 to 1.5 mm-3 mm.

[0141] In some possible implementations, see Figures 2 to 4 As shown, the motor 100 of the embodiment of the present application may further include a control board 150 . The Hall element 132 is disposed on a side of the control board 150 facing the shaft-moving magnet 141 .

[0142] In the embodiment of the present application, the Hall element 132 can have an inductive positioning function. When the electrical signal enters the control board 150, the Hall element 132 located on the control board 150 can generate an induction with the positioning magnet 131, so as to identify the rotation position of the positioning magnet 131 through the Hall element 132, thereby limiting the rotation angle of the output shaft 1121.

[0143] Among them, see Figure 5 As shown, there are two Hall elements 132, and the two Hall elements 132 are arranged at intervals along the circumference of the electric toothbrush.

[0144] In the embodiments of the present application, two Hall elements 132 can be used to limit the rotation angle of the output shaft 1121. When the positioning magnet 131 rotates to correspond to different Hall elements 132, different voltage values can be generated to determine the position of the positioning magnet 131 through the voltage values. Thus, the control board 150 can send signals based on the position of the positioning magnet 131 to drive the output shaft 1121 to rotate forward or backward.

[0145] In some examples, the positioning magnet 131 faces the Hall element 132. Refer to Figure 2 and Figure 5 As shown, the two Hall elements 132 can be distinguished as a first Hall element 1321 and a second Hall element 1322. Among them, the voltage range for the first Hall element 1321 to detect the positioning magnet 131 can be 0 - 2.5V. The voltage range for the second Hall element 1322 to detect the positioning magnet 131 can be 2.5V - 5V. The detection of the positioning magnet 131 by the first Hall element 1321 and the second Hall element 1322 is for the entire plane of 360°, which enables different voltage values to be generated by the first Hall element 1321 and the second Hall element 1322 when the positioning magnet 131 rotates to different positions. Further, different voltage values represent different positions of the positioning magnet 131. Through this electrical control method, the position of the positioning magnet 131 can be accurately identified, that is, the rotation position of the output shaft 1121 can be accurately determined. Of course, the voltages of the two Hall elements 132 here can be different numerical ranges according to different working conditions as long as the above effects can be achieved.

[0146] In some examples, the positioning magnet 131 can include at least a pair of adjacent N poles and S poles. The Hall element 132 can detect the movement position of the output shaft 1121 by sensing the magnetic field information of at least one group of N poles and S poles, thereby controlling the rotation angle of the output shaft 1121. The magnetic field information can be the intensity of the magnetic field, the information of the magnetic poles, the information of the magnetic flux, etc.

[0147] In some examples, the positioning magnet 131 can be provided with a central through hole. The positioning magnet 131 can be sleeved outside the output shaft 1121 through the central through hole. Among them, the positioning magnet 131 can be directly sleeved outside the output shaft 1121, or can be indirectly installed on the output shaft 1121 through other structures.

[0148] In some examples, since the Hall element 132 can be disposed on the control board 150, the control board 150 and the output shaft 1121 do not rotate synchronously. The Hall element 132 may also be provided with a central through hole. The control board 150 can be sleeved outside the output shaft 1121 through the central through hole, and the control board 150 is not connected to the output shaft 1121 so that the two do not rotate synchronously, thereby reducing the possibility that the Hall element 132 and the positioning magnet 131 rotate synchronously and causing the Hall element 132 to fail to recognize.

[0149] In some examples, the control board 150 can be an FPC flexible circuit board.

[0150] In some realizable ways, refer to Figure 5 As shown, the included angle n formed by the connection lines of the two Hall elements 132 and the axis of the output shaft 1121 is less than or equal to 90°.

[0151] In the embodiments of the present application, the positions of the two Hall elements 132 can be used to control the rotation angle of the output shaft 1121 so that the output shaft 1121 can rotate forward or backward within a range of 90°, for example, it can be 30°, 40°, 50°, 60°, etc., thereby realizing a large-angle rotation of the output shaft 1121 and increasing the contact area between the brush head and the oral cavity.

[0152] It should be noted that the included angle n formed by the connection lines of the two Hall elements 132 and the axis of the output shaft 1121 can be used to control the maximum rotation angle of the output shaft 1121. When the included angle n formed by the connection lines of the two Hall elements 132 and the axis of the output shaft 1121 is greater than 90°, the angle of the brush head reciprocating in the oral cavity is too large, and the vibration feeling generated by the brush head is also greater, which is likely to damage the teeth and gums and affect the user experience.

[0153] In some realizable ways, refer to Figure 4 As shown, the motor 100 may further include a positioning member 160 fixed to the output shaft 1121. The positioning member 160 can be sleeved on the output shaft 1121 and abutted against adjacent components for positioning. Among them, the positioning member 160 may include a first positioning portion 161 and a second positioning portion 162 connected to each other. The diameter of the first positioning portion 161 may be greater than the diameter of the second positioning portion 162. The positioning magnet 131 is sleeved on the second positioning portion 162 and abutted against the first positioning portion 161 for positioning. The positioning magnet 131 is fixed to the second positioning portion 162.

[0154] In the embodiments of the present application, the positioning magnet 131 can be fixed to the output shaft 1121 through the positioning member 160 to facilitate the positioning and installation of the positioning magnet 131. During the installation of the positioning magnet 131, the positioning member 160 can abut against adjacent components for the installation of the positioning member 160. Then, the positioning magnet 131 can be sleeved on the positioning member 160, that is, the installation and positioning of the positioning magnet 131 are completed.

[0155] Specifically, by setting the diameter of the first positioning portion 161 of the positioning member 160 to be larger than the diameter of the second positioning portion 162, a limiting step can be formed between the first positioning portion 161 and the second positioning portion 162. The positioning magnet 131 can be sleeved on the second positioning portion 162 with a smaller diameter, and by pushing the positioning magnet 131 against the first positioning portion 161, the positioning magnet 131 can be limited for easy installation.

[0156] In some examples, the positioning magnet 131 can be fixed to the positioning member 160 by an adhesive method. For example, a viscous colloid can be coated between the positioning magnet 131 and the limiting step of the positioning member 160 to fix the positioning magnet 131 to the positioning member 160.

[0157] In some realizable ways, as shown in Figure 4 the shaft moving magnet 141 is sleeved on one end of the output shaft 1121 away from the brush head, and the shaft moving magnet 141 abuts against the second positioning portion 162 for positioning.

[0158] In the embodiments of the present application, the shaft moving magnet 141 is installed at one end of the output shaft 1121 away from the brush head. Compared with the shaft moving magnet 141 being arranged in the middle or other positions of the output shaft 1121, this can enable the motor of the electric toothbrush not to be changed too much, reduce the re - opening of molds, and further greatly reduce costs, thus obtaining better economic benefits. At the same time, the shaft moving magnet 141 realizes installation and positioning by abutting against the second positioning portion 162, which further facilitates assembly, and enables the positioning member 160 to not only position the positioning magnet 131 but also position the shaft moving magnet 141. Multiple functions are realized through a simple structure, which is beneficial to the design of a miniaturized electric toothbrush and further beneficial to improving the competitiveness of the product.

[0159] Moreover, it is easy to understand that when the motor 100 is powered on, the first stator assembly 111 can drive the output shaft 1121 to rotate through the change of the magnetic field, and the second stator assembly 142 can drive the output shaft 1121 to move along its own axial direction X through the change of the magnetic field. Therefore, if the second driving mechanism 140 is arranged between the rotation positioning assembly 130 and the first driving mechanism 110, the magnetic fields of the first stator assembly 111 and the second stator assembly 142 will interfere with each other, thus easily affecting the movement direction of the output shaft 1121.

[0160] In addition, by arranging the axially movable magnet 141 at one end of the output shaft 1121 away from the brush head, it is not necessary to damage structures such as the motor housing 120 during the product optimization process. Thus, while realizing the rotation of the output shaft 1121 and the axial movement in the X direction, the product optimization cost can be reduced.

[0161] Specifically, when improving the existing product, since the output shaft 1121 of the existing product can rotate, the output shaft 1121 can be optimized. For example, the length of the output shaft 1121 can be increased to reserve an installation position for the second driving mechanism 140 at the end of the output shaft 1121. Thus, the axial movement of the output shaft in the X direction can be realized through the second driving mechanism 140, and then the superimposed movement of the output shaft 1121 rotating around its own axis and moving axially in the X direction can be realized.

[0162] In some implementable ways, referring to Figure 4 as shown, the electric toothbrush according to the embodiment of the present application may further include a fixing bracket 170. The fixing bracket 170 may be fixedly arranged at one end of the motor 100 away from the brush head. Among them, the output shaft 1121 extends into the fixing bracket 170. The second stator assembly 142 may be arranged in the fixing bracket 170, and at least part of the axially movable magnet 141 is located within the fixing bracket 170.

[0163] In the embodiment of the present application, when the axially movable magnet 141 is located at one end of the output shaft 1121 away from the brush head, the second stator assembly 142 can be fixed by the fixing bracket 170. The fixing bracket 170 is also correspondingly arranged at one end of the output shaft 1121 away from the brush head. Therefore, during the installation of the motor 100, installing the fixing bracket 170 and the second driving mechanism 140 at the end of the output shaft 1121 can reduce the installation difficulty and is not likely to damage the structure of the motor housing 120, which is beneficial to reducing the assembly cost.

[0164] Among them, the axially movable magnet 141 may also be provided with a central through hole, and the axially movable magnet 141 can be sleeved on the output shaft 1121 through the central through hole. The second stator assembly 142 is arranged in the fixing bracket 170. Therefore, at least part of the axially movable magnet 141 can correspond to the second stator assembly 142, so that the second stator assembly 142 can drive the axially movable magnet 141 and the output shaft 1121 to move synchronously in the axial direction of X through the magnetic field change.

[0165] In some implementable ways, the fixing bracket 170 may be screwed to one end of the motor housing 120 away from the brush head.

[0166] In the embodiments of the present application, during the axial movement of the output shaft 1121 along the axial direction X, the shaft moving magnet 141 is fixed relative to the output shaft 1121 to move synchronously with the output shaft 1121 along the axial direction X. The fixing bracket 170 can be used to fix the second stator assembly 142. By connecting the fixing bracket 170 to the motor housing 120, the fixing bracket 170 can be kept stationary, so that during the axial movement of the shaft moving magnet 141 along the axial direction X, the second stator assembly 142 can remain stationary, and the second stator assembly 142 and the output shaft 1121 do not move synchronously.

[0167] The fixing bracket 170 and the motor housing 120 can be connected by screwing. Since the output shaft 1121 has a dual movement of rotation and axial movement, the vibration of the motor 100 of the electric toothbrush is relatively large. The screwing connection between the fixing bracket 170 and the motor housing 120 can increase the connection stability between the fixing bracket 170 and the motor housing 120, and the anti-vibration ability is stronger, which is beneficial to reducing the noise generated by the motor 100.

[0168] In some examples, corresponding mounting holes can be provided on the motor housing 120 and the fixing bracket 170. Among them, the locking member can pass through one of the mounting holes to be threadedly connected with the other mounting hole, so as to realize the screwing connection between the motor housing 120 and the fixing bracket 170.

[0169] In other examples, an external thread portion can be provided on one of the motor housing 120 and the fixing bracket 170, and an internal thread portion can be provided on the other. By the cooperation connection of the internal thread and the external thread, the motor housing 120 and the fixing bracket 170 can be screwed.

[0170] In some examples, along the axial direction X of the output shaft, a part of the shaft moving magnet 141 can protrude from the end of the fixing bracket 170 away from the brush head.

[0171] In some realizable ways, referring to Figure 2 and Figure 4 As shown, the number of the shaft moving magnets 141 can be multiple, and the magnetism of any two adjacent shaft moving magnets 141 is opposite. The second stator assembly 142 can correspond to the connection part of two adjacent shaft moving magnets 141.

[0172] In the embodiments of the present application, for the convenience of description, along the axial direction X of the output shaft and away from the brush head, the multiple shaft moving magnets 141 can be successively the first magnet 1411, the second magnet 1412, and the third magnet 1413. Among them, the magnetism of the first magnet 1411 and the second magnet 1412 is opposite, and the magnetism of the second magnet 1412 and the third magnet 1413 is opposite. The second stator assembly 142 corresponding to the connection part of the first magnet 1411 and the second magnet 1412 can generate a magnetic field. By changing the direction of the current, a magnetic field with alternating magnetic poles can be formed.

[0173] Therefore, when the magnetic field has the same magnetism as the first magnet 1411 and the third magnet 1413, according to the principle of like poles repelling each other, the first magnet 1411 can be driven to move away from the magnetic field, that is, the first magnet 1411 can drive the output shaft 1121 to move towards the brush head. Moreover, since the second magnet 1412 has the opposite magnetism to the magnetic field, according to the principle of opposite poles attracting each other, the second magnet 1412 can be driven to move towards the magnetic field, that is, the second magnet 1412 can drive the output shaft 1121 to move towards the brush head. The first magnet 1411 and the second magnet 1412 can drive the output shaft 1121 to move a certain distance along the axial direction X. The second magnet 1412 and the third magnet 1413 are located in the magnetic field. Since the third magnet 1413 has the same magnetism as the magnetic field, according to the principle of like poles repelling each other, the third magnet 1413 can be driven to move away from the magnetic field, that is, the third magnet 1413 can continue to drive the output shaft 1121 to move towards the brush head.

[0174] When the output shaft 1121 needs to move in the reverse direction along the axial direction X, the direction of the current can be changed so that the magnetic field has the opposite magnetism to the first magnet 1411 and the third magnet 1413. According to the principle of opposite poles attracting each other, the magnetic field can attract the third magnet 1413 to move away from the brush head. Moreover, since the second magnet 1412 has the same magnetism as the magnetic field, according to the principle of like poles repelling each other, the magnetic field can drive the second magnet 1412 to move away from the brush head. Since the third magnet 1413 has the same magnetism as the magnetic field, according to the principle of like poles repelling each other, the third magnet 1413 can continue to be driven to move away from the brush head.

[0175] In some examples, the number of the shaft-moving magnets 141 can be used to set the displacement of the output shaft 1121 moving along the axial direction X. The more the number of the shaft-moving magnets 141, the greater the displacement that the output shaft 1121 can be driven to move along the axial direction X by the shaft-moving magnets 141. Among them, the number of the shaft-moving magnets 141 can be set to an odd number to meet the displacement requirement of the output shaft moving along the axial direction X.

[0176] It is easy to understand that the more the number of the shaft-moving magnets 141, the larger the space occupied by the shaft-moving magnets 141 along the axial direction X of the output shaft in the motor 100, and the greater the weight of the motor 100, which easily leads to a larger size and heavier weight of the electric toothbrush and affects the user experience.

[0177] Exemplarily, the number of the shaft-moving magnets 141 can be three. The three shaft-moving magnets 141 can meet the displacement requirement of the output shaft 1121 moving along the axial direction X, so that the brush head can have a better cleaning effect. Moreover, the three shaft-moving magnets 141 occupy a smaller space size along the axial direction X and have reasonable weight parameters, which is beneficial to realizing the portability of the electric toothbrush.

[0178] In some implementable ways, refer to Figure 4 As shown, a reset member 180 and a bearing 190 may further be provided in the motor housing 120. The outer side of the bearing 190 may be fixed to the reset member 180. The bearing 190 may be sleeved on the output shaft 1121. One side of the reset member 180 close to the motor housing 120 is fixed relative to the motor housing 120.

[0179] Wherein, the bearing 190 allows the output shaft 1121 to rotate relative to the reset member 180. When the moving magnet 141 drives the output shaft 1121 to move along the axial direction X, the output shaft 1121 deforms the reset member 180 through the bearing 190, so as to further enable the reset member 180 to reset the axial movement of the output shaft.

[0180] In the embodiment of the present application, the inner side of the reset member 180 may be connected to the output shaft 1121 through the bearing 190. Therefore, during the rotation of the output shaft 1121, the output shaft 1121 and the reset member 180 do not rotate synchronously. The control board 150 may be disposed on the reset member 180, so that the Hall element 132 on the control board 150 and the output shaft 1121 also do not rotate synchronously.

[0181] When the output shaft 1121 moves along the axial direction X, the bearing 190 and the output shaft 1121 may move synchronously. Since one side of the reset member 180 close to the motor housing 120 is relatively fixed, the reset member 180 can generate elastic deformation, and the control board 150 can be driven to move synchronously during the deformation process of the reset member 180, so that the distance between the Hall element 132 and the positioning magnet 131 along the axial direction X of the output shaft is constant, thereby ensuring that the distance between the Hall element 132 and the positioning magnet 131 hardly changes, and further ensuring that the function of the Hall element 132 to identify the positioning magnet 131 is not damaged.

[0182] Wherein, the synchronous movement of the positioning magnet 131 and the Hall element 132 along the axial direction X of the output shaft can be realized through the reset member 180. The reset member 180 may have elasticity. One side of the reset member 180 close to the motor housing 120 is fixed relative to the motor housing 120. When the output shaft 1121 moves along the axial direction X, the reset member 180 is deformed by the acting force of the bearing 190. When the output shaft 1121 moves in the reverse direction, the reset member 180 can release elastic potential energy to promote the reset of the output shaft 1121.

[0183] In some examples, a bearing 190 and a reset member 180 may be provided between the first stator assembly 111 and the second driving mechanism 140. Along the axial direction X of the output shaft, the first positioning portion 161 of the positioning member 160 may abut against the bearing 190, and the second positioning portion 162 of the positioning member 160 may abut against the moving magnet 141.

[0184] In some examples, refer toFigure 3 , Figure 4 and Figure 6 As shown in Figure 6 , along the axial direction X of the output shaft, bearings 190 can be respectively provided at both ends of the first stator assembly 111 to improve the stability of the output shaft 1121 during movement.

[0185] In some examples, reset members 180 can be respectively provided at both ends of the first stator assembly 111, and the reset members 180 can be arranged corresponding to the bearings 190. By sharing the compressive deformation generated when contacting other structures in the motor housing 120 by the two reset members 180, it is beneficial to improve the service life of the reset members 180.

[0186] In some examples, along the axial direction X of the output shaft, positioning sleeves 101 can be respectively provided at both ends of the first stator assembly 111. The positioning sleeves 101 can be sleeved outside the output shaft 1121. One end of the positioning sleeve 101 can be connected to the rotor assembly 112, and the other end of the positioning sleeve 101 can abut against the bearing 190. By providing the positioning sleeves 101, it can be used to facilitate the installation of the motor 100.

[0187] In some examples, the reset member 180 and the outer side of the bearing 190 can be connected by but not limited to clamping, bonding and other methods.

[0188] In some examples, along the axial direction X of the output shaft, the first stator assembly 111 can be close to the center of the output shaft 1121 to provide stable support for the rotation of the output shaft 1121.

[0189] In some realizable ways, as shown in Figure 3 A clamping portion 121 can be provided in the motor housing 120. The reset member 180 can abut against the clamping portion 121 to fix the reset member 180 relative to the motor housing 120.

[0190] In the embodiments of the present application, by providing the clamping portion 121 in the motor housing 120, it can be used to position the reset member 180 along the axial direction X of the output shaft. Thus, when the output shaft 1121 moves along the axial direction X, the side of the reset member 180 close to the motor housing 120 can be fixed relative to the motor housing 120. By forming the clamping portion 121 on the motor housing 120, further, other redundant structures are avoided, which is beneficial to reducing the volume of the electric toothbrush.

[0191] In some examples, as shown in Figure 3As shown, along the axial direction X of the output shaft, a spacing can be provided between the clamping portion 121 and the first stator assembly 111. Among the two end faces of the reset member 180 along the axial direction X of the output shaft, one end face can abut against the first stator assembly 111, and the other end face can abut against the clamping portion 121. Thus, when the output shaft 1121 moves axially along X, the side of the reset member 180 close to the motor housing 120 can be limited and fixed by the two clamping portions 121.

[0192] In some other examples, along the axial direction X of the output shaft, two spaced clamping portions 121 can be provided on the inner wall of the motor housing 120. The two end faces of the reset member 180 along the axial direction X of the output shaft can respectively abut against the two clamping portions 121. Thus, when the output shaft 1121 moves axially along X, the side of the reset member 180 close to the motor housing 120 can be limited and fixed by the two clamping portions 121.

[0193] In some examples, the clamping portion 121 can protrude from the inner wall of the motor housing 120.

[0194] Figure 7 It is a partial front view structural schematic diagram of the motor 100 of an electric toothbrush according to another embodiment provided by the present application; Figure 8 It is a partial exploded structural schematic diagram of the motor 100 of an electric toothbrush according to another embodiment provided by the present application.

[0195] See Figure 7 and Figure 8 As shown in and, an embodiment of the present application further provides an electric toothbrush, including a motor 100, and the motor 100 can include a first driving mechanism 110, an output shaft 1121, a rotation positioning assembly 130, and a fixing base 200.

[0196] The first driving mechanism 110 can include a first stator assembly 111 and a rotor assembly 112. The rotor assembly 112 includes an output shaft 1121. The first stator assembly 111 can cause the output shaft 1121 to rotate through a magnetic field. The output shaft 1121 has a first end and a second end disposed opposite to each other. The first end is used to connect to the toothbrush head.

[0197] The rotation positioning assembly 130 can include a positioning magnet 131 and a Hall element 132. The positioning magnet 131 and the Hall element 132 are spaced apart. The fixing base 200 can be fixedly disposed on the output shaft 1121. The positioning magnet 131 is adhesively connected to the fixing base 200.

[0198] Wherein, when the output shaft 1121 rotates, it can drive the fixing base 200 to rotate. The rotation of the fixing base 200 can drive the positioning magnet 131 to rotate. The Hall element 132 can confirm the rotation angle of the output shaft 1121 by identifying the rotation position of the positioning magnet 131.

[0199] In the embodiments of the present application, the Hall element 132 can be used to sense and identify the position of the positioning magnet 131 to limit the rotation angle of the output shaft 1121. During the rotation of the output shaft 1121, there is no direct contact between the Hall element 132 and the positioning magnet 131. Therefore, when it is necessary to achieve a large-angle rotation of the output shaft 1121, since there is no direct contact between the Hall element 132 and the positioning magnet 131, the Hall element 132 and the positioning magnet 131 are not easily subjected to large mechanical stresses, and thus are not easily worn and deformed, which is beneficial to realizing the high-precision rotation and the reliability of the large-angle rotation of the output shaft 1121.

[0200] Among them, the fixing seat 200 can be used to fix the positioning magnet 131 on the output shaft 1121, so that the positioning magnet 131 can move synchronously with the output shaft 1121 through the fixing seat 200. It should be noted that the synchronous movement includes rotation around the axis of the output shaft 1121 and movement along the axial direction X of the output shaft 1121.

[0201] Moreover, in the embodiments of the present application, the positioning magnet 131 and the fixing seat 200 are adhesively connected. Since the positioning magnet 131 has a relatively high brittleness, compared with other connection methods, the adhesive connection can make the positioning magnet 131 basically not receive or receive a small applied force during the installation process, further preventing the positioning magnet 131 from cracking. Therefore, the positioning magnet 131 can be protected from being damaged by external forces through the bonding method. Moreover, the bonding method is not likely to affect the magnetism of the positioning magnet 131 and reduce the interference of the Hall element 132 in identifying the positioning magnet 131.

[0202] In some feasible ways, as shown in Figure 7 and Figure 8 , the positioning magnet 131 is a circular ring with a positioning hole 220b provided on the inner side. The positioning hole 220b can be sleeved on the fixing seat 200, and at least a part of one side of the positioning magnet 131 is attached and adhesively bonded to the fixing seat 200. The diameter of the positioning hole 220b is larger than the diameter of the sleeved part of the fixing seat 200.

[0203] In the embodiments of the present application, since the diameter of the positioning hole 220b of the positioning magnet 131 is larger than the diameter of the sleeved portion of the fixing base 200, during the process of installing the positioning magnet 131 on the fixing base 200, the sleeved portion of the fixing base 200 basically does not generate frictional force or outward expanding force on the positioning magnet 131. That is to say, the positioning magnet 131 is basically not subjected to external force, or the external force applied to the positioning magnet 131 is small, and no external force needs to be applied. The positioning magnet 131 can be easily sleeved on the fixing base 200, thereby reducing the possibility of damage to the positioning magnet 131 due to the acting force. Of course, since the positioning magnet 131 and the fixing base 200 are fixed by gluing, and due to the relatively large diameter of the positioning hole 220b, this allows part of the glue to penetrate between the sleeved portion of the fixing base 200 and the positioning magnet 131, and this situation basically does not generate a force that damages the positioning magnet either.

[0204] In some implementable ways, the fixing base 200 is a copper fixing base.

[0205] In the embodiments of the present application, the fixing base 200 can be a copper fixing base. On the one hand, the fixing base 200 made of copper material is not likely to affect the magnetism of the directional magnet. On the other hand, the hardness of the copper material is relatively low, which can reduce the damage or destruction of the directional magnet caused by the fixing base 200 when the directional magnet is installed on the fixing base 200.

[0206] Exemplarily, the copper fixing base can be, but is not limited to, a brass fixing base.

[0207] In some implementable ways, as shown in Figure 8 the fixing base 200 of the embodiments of the present application can include a sleeved portion 210 and a fixing portion 220. The fixing portion 220 extends circumferentially around the sleeved portion 210. Among them, the sleeved portion 210 can be fixed relative to the output shaft 1121. The positioning hole 220b is sleeved on the sleeved portion 210. At least part of one side of the positioning magnet 131 is glued to the fixing portion 220.

[0208] In the embodiments of the present application, the positioning magnet 131 can be sleeved on the sleeved portion 210 through the positioning hole 220b. The fixing portion 220 extends circumferentially around the sleeved portion 210. Further, one side of the positioning magnet 131 is adhesively connected to the fixing portion 220. For the fixing base 200 with such a structure, it is convenient for the positioning and fixing of the positioning magnet 131, and the connection stability of the positioning magnet 131 is good and it is not easily damaged.

[0209] Among them, the outer diameter of the positioning magnet 131 can be greater than, less than, or equal to the outer diameter of the fixing part 220, which is not limited in the embodiments of the present application. For example, the outer diameter of the positioning magnet 131 and the outer diameter of the fixing part 220 can be the same, so that there can be a large contact area between the positioning magnet 131 and the fixing part 220. The surfaces of the positioning magnet 131 and the fixing part 220 that are in contact with each other can be used to set glue for gluing the positioning magnet 131 and the fixing part 220.

[0210] In some realizable ways, as shown in Figure 8 shown, a through hole 220a can be provided on the fixing part 220.

[0211] In the embodiment of the present application, before the positioning magnet 131 is installed on the fixing seat 200, along the axial direction X of the output shaft, glue can be provided on the surface of the fixing part 220 facing the positioning magnet 131. Then, the positioning magnet 131 is sleeved on the sleeving part 210 through the positioning hole 220b. When the positioning magnet 131 and the fixing part 220 are in contact with each other, the glue can be extruded, so that the glue can be evenly distributed between the positioning magnet 131 and the fixing part 220. The glue overflowing when the positioning magnet 131 and the fixing part 220 are in contact with each other can enter the through hole 220a. The positioning magnet 131 and the through hole 220a can form a space for accommodating the glue, so as to reduce the amount of glue overflowing along the radial direction of the output shaft 1121, thereby reducing the possibility that the glue overflows and adheres to other structures, affecting the transmission of the internal structure of the motor 100, and further affecting the normal movement of the output shaft 1121.

[0212] Moreover, during the maintenance of the positioning magnet 131, the through hole 220a can be used to provide a disassembly force application point for the positioning magnet 131. When the positioning magnet 131 needs to be replaced, a force for detaching from the sleeving part 210 of the positioning magnet 131 can be applied through the through hole 220a from the side of the fixing seat 200 where the directional magnet is not provided, so as to disassemble the positioning magnet 131.

[0213] Among them, the number of the through holes 220a can be multiple. The multiple through holes 220a can be distributed at intervals along the circumferential direction of the output shaft 1121. Therefore, when disassembling the positioning magnet 131, the multiple through holes 220a can be used to provide disassembly force application points for the positioning magnet 131, so as to apply a balanced force for detaching from the sleeving part 210 of the fixing seat 200 to multiple positions of the positioning magnet 131, thereby reducing the possibility of damaging the positioning magnet 131 when disassembling the positioning magnet 131.

[0214] In some examples, the shape of the through hole 220a can be, but is not limited to, a square hole.

[0215] In some implementable ways, there is no metal obstruction between the positioning magnet 131 and the Hall element 132.

[0216] Since metal materials are likely to affect the accuracy of the Hall element 132 in identifying the positioning magnet 131, in the embodiments of the present application, by setting no metal obstruction between the positioning magnet 131 and the Hall element 132, the accuracy of the Hall element 132 in identifying the position of the positioning magnet 131 can be improved, thereby improving the accuracy of controlling the rotation angle of the output shaft 1121.

[0217] It should be noted here that the numerical values and ranges involved in the present application are approximate values. Affected by the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0218] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0219] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "top end", "bottom end", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial X", "circumferential", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0220] In the embodiments of the present application or implied that the indicated device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically and precisely specified.

[0221] The terms "first", "second", "third", "fourth", etc. (if any) in the description of the embodiments of the present application, the claims and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances, so that the embodiments of the present application described here, for example, can be implemented in an order other than those illustrated or described here.

[0222] In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0223] The term "plurality" as used herein refers to two or more. The term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " as used herein generally indicates that the associated objects before and after are in an "or" relationship; in a formula, the character " / " indicates that the associated objects before and after are in a "division" relationship.

[0224] It should be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0225] It should be understood that in the embodiments of the present application, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Claims

1. An electric toothbrush, comprising a motor (100), characterized in that: The motor (100) comprises: A first driving mechanism (110) comprises a first stator assembly (111) and a rotor assembly (112); the rotor assembly (112) comprises an output shaft (1121); the first stator assembly (111) can cause the output shaft (1121) to rotate around an axis by changing a magnetic field; the output shaft (1121) is connected to a brush head; A motor housing (120), at least housing a portion of the first driving mechanism (110); A rotation positioning assembly (130) comprises a positioning magnet (131) and a Hall element (132); the positioning magnet (131) is fixed relative to the output shaft (1121); when the output shaft (1121) rotates, the positioning magnet (131) can be driven to rotate; and the Hall element (132) can confirm the rotation angle of the output shaft (1121) by identifying the rotation position of the positioning magnet (131); A second driving mechanism (140) comprises an axially moving magnet (141) and a second stator assembly (142), wherein the axially moving magnet (141) is fixedly arranged relative to the output shaft (1121), and the second stator assembly (142) can cause the axially moving magnet (141) to move along the axial direction (X) of the output shaft through a change in magnetic field, and cause the axially moving magnet (141) to drive the output shaft (1121) to move along the axial direction; The distance between the positioning magnet (131) and the Hall element (132) is smaller than the distance between the axial moving magnet (141) and the Hall element (132).

2. The electric toothbrush according to claim 1, characterized in that: The positioning magnet (131) is located between the Hall element (132) and the axial moving magnet (141).

3. The electric toothbrush according to claim 2, characterized in that: The distance between the positioning magnet (131) and the Hall element (132) is smaller than the distance between the positioning magnet (131) and the axial moving magnet (141).

4. The electric toothbrush according to claim 1, characterized in that: The Hall element (132) is located between the positioning magnet (131) and the axial moving magnet (141), and the Hall element (132) faces one side of the positioning magnet (131).

5. The electric toothbrush according to any one of claims 1 to 4, characterized in that: Along the axial direction (X) of the output shaft, the spacing distance between the positioning magnet (131) and the Hall element (132) is 1.5 mm to 3 mm.

6. The electric toothbrush according to any one of claims 1 to 4, characterized in that: The motor (100) further comprises a control board (150), and the Hall element (132) is arranged on a side of the control board (150) facing the axial moving magnet (141); The number of the Hall elements (132) is two, and the two Hall elements (132) are arranged at intervals along the circumference of the electric toothbrush.

7. The electric toothbrush according to claim 6, characterized in that: The angle formed by the line connecting the two Hall elements (132) and the axis of the output shaft (1121) is less than or equal to 90°.

8. The electric toothbrush according to any one of claims 1 to 4, characterized in that: The motor (100) further comprises a positioning member (160) fixed to the output shaft (1121), wherein the positioning member (160) is sleeved on the output shaft (1121) and abuts against adjacent components for positioning; The positioning member (160) comprises a first positioning portion (161) and a second positioning portion (162) which are connected to each other, the diameter of the first positioning portion (161) is larger than the diameter of the second positioning portion (162), the positioning magnet (131) is sleeved on the second positioning portion (162) and abuts against the first positioning portion (161) for positioning, and the positioning magnet (131) is fixed to the second positioning portion (162).

9. The electric toothbrush according to claim 8, characterized in that: The shaft-moving magnet (141) is sleeved on an end of the output shaft (1121) away from the brush head, and the shaft-moving magnet (141) abuts against the second positioning portion (162) for positioning.

10. The electric toothbrush according to claim 1, characterized in that: The second driving mechanism (140) is arranged at an end of the output shaft (1121) away from the brush head.

11. The electric toothbrush according to claim 10, characterized in that: The motor (100) further comprises a fixing bracket (170), wherein the fixing bracket (170) is fixedly arranged at an end of the motor (100) away from the brush head; The output shaft (1121) extends into the fixed bracket (170), the second stator assembly (142) is arranged on the fixed bracket (170), and at least a portion of the axial moving magnet (141) is located inside the fixed bracket (170).

12. The electric toothbrush according to claim 11, characterized in that: The fixing bracket (170) is screwed to an end of the motor housing (120) away from the brush head.

13. The electric toothbrush according to claim 10, characterized in that: The number of the axially moving magnets (141) is an odd number, and the magnetic properties of any two adjacent axially moving magnets (141) are opposite.

14. The electric toothbrush according to claim 1, characterized in that: A reset member (180) and a bearing (190) are also provided in the motor housing (120); the outer side of the bearing (190) is fixed to the reset member (180); the bearing (190) is sleeved on the output shaft (1121); and a side of the reset member (180) close to the motor housing (120) is fixed relative to the motor housing (120); The bearing (190) allows the output shaft (1121) to rotate relative to the reset member (180). When the axial moving magnet (141) drives the output shaft (1121) to move axially, the output shaft (1121) causes the reset member (180) to deform through the bearing (190), so as to further enable the reset member (180) to reset the axial (X) movement of the output shaft.

15. The electric toothbrush according to claim 14, characterized in that: A clamping portion (121) is provided in the motor housing (120), and the reset member (180) abuts against the clamping portion (121) so that the reset member (180) is fixed relative to the motor housing (120).

16. An electric toothbrush, comprising a motor (100), characterized in that: The motor (100) comprises: A first driving mechanism (110) comprises a first stator assembly (111) and a rotor assembly (112), wherein the rotor assembly (112) comprises an output shaft (1121), and the first stator assembly (111) can cause the output shaft (1121) to rotate through a magnetic field; An output shaft (1121) having a first end and a second end arranged opposite to each other, wherein the first end is used for connecting to a brush head; A rotation positioning component (130) comprises a positioning magnet (131) and a Hall element (132), wherein the positioning magnet (131) and the Hall element (132) are arranged at a distance from each other; A fixing seat (200), the fixing seat (200) being fixedly disposed on the output shaft (1121), and the positioning magnet (131) being adhesively connected to the fixing seat (200); When the output shaft (1121) rotates, it can drive the fixed seat (200) to rotate, and the rotation of the fixed seat (200) drives the positioning magnet (131) to rotate, and the Hall element (132) can confirm the rotation angle of the output shaft (1121) by identifying the rotation position of the positioning magnet (131).

17. The electric toothbrush according to claim 16, characterized in that: The positioning magnet (131) is in the shape of a ring with a positioning hole (220b) provided inside, the positioning hole (220b) is sleeved on the fixing seat (200), and at least part of one side of the positioning magnet (131) is attached to and glued to the fixing seat (200), and the diameter of the positioning hole (220b) is larger than the diameter of the sleeved portion of the fixing seat (200).

18. The electric toothbrush according to claim 16, characterized in that The fixing seat (200) is a copper fixing seat (200).

19. The electric toothbrush according to claim 17, characterized in that The fixing seat (200) comprises a sleeve portion (210) and a fixing portion (220), wherein the fixing portion (220) extends around the circumference of the sleeve portion (210); The sleeve portion (210) is fixed relative to the output shaft (1121), the positioning hole (220b) is sleeved on the sleeve portion (210), and at least a portion of one side of the positioning magnet (131) is glued to the fixing portion (220).

20. The electric toothbrush according to claim 19, characterized in that The fixing portion (220) is provided with a through opening (220a).

21. The electric toothbrush according to claim 16, characterized in that There is no metal shielding between the positioning magnet (131) and the Hall element (132).

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