Electric toothbrush

Abstract

The present application relates to the field of electric toothbrush technology, and in particular, to an electric toothbrush. The electric toothbrush comprises a motor, an elastic member, and a pressure sensor. The motor comprises an output shaft. At least a portion of the motor is located in a machine core support, and the output shaft passes through the machine core support and extends to the exterior of the machine core support. The elastic member is at least partially connected to the machine core support, abuts against the circumferential wall of the output shaft, and is configured for elastically deforming according to the offset of the output shaft in a radial direction. The pressure sensor is arranged on the side of the elastic member distal to the output shaft. The pressure sensor and a circuit board are electrically connected through a connecting wire, and the pressure sensor is configured for converting elastic deformation into an electric signal and transmitting the electric signal to the circuit board. The pressure sensor and the elastic member of the electric toothbrush provided in the embodiments of the present application are separated, so as to prevent the breakage of the connecting wire due to rotation of the output shaft when the electric toothbrush is in an unused state.

Description

electric toothbrush

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 12, 2024, with application number 202410051043.6 and application name “Electric Toothbrush”, the entire contents of which are incorporated by reference into this application.

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on February 7, 2024, with application number 202420289696.3 and application name “Elastic Part, Motor and Electric Toothbrush”, the entire contents of which are incorporated by reference into this application.

[0003] This application claims priority to the Chinese patent application filed with the China Patent Office on May 27, 2024, with application number 202421179811.8 and application name “Electric Toothbrush”, the entire contents of which are incorporated by reference into this application.

[0004] This application claims priority to the Chinese patent application filed with the China Patent Office on August 2, 2024, with application number 202421875892.5 and application name “Internal bracket for electric toothbrush and electric toothbrush”, the entire contents of which are incorporated by reference into this application.

[0005] This application claims priority to a patent application filed with the Patent Office of China on October 21, 2024, with application number 202422537299.6 and application name “Electric Toothbrush”, the entire contents of which are incorporated by reference into this application. Technical Field

[0006] The present application relates to the technical field of electric toothbrushes, and in particular to an electric toothbrush. Background Art

[0007] As people's living standards improve, oral cleaning appliances such as electric toothbrushes have become widely popular as electronic products for personal care. Generally, an electric toothbrush includes a vibrating motor and a brush head, which is connected to the output shaft of the vibrating motor. The vibrating motor drives the brush head to vibrate, thereby cleaning the user's oral cavity.

[0008] Many electric toothbrushes can damage gums and reduce cleaning effectiveness due to excessive force during use. To address this issue, a pressure sensor is typically installed on the output shaft to detect the pressure applied to the brush head. When the pressure on the brush head is excessive, an alarm sounds to alert the user, thereby reducing damage to the gums.

[0009] However, in some existing electric toothbrushes, when not powered on or in standby mode, the output shaft of the vibration motor can rotate at a large angle, for example, more than 30 degrees or even 360 degrees. The large-angle rotation of the output shaft can easily cause the connecting wire of the pressure sensor located on the output shaft to be entangled on the output shaft, and cause the connecting wire of the pressure sensor to break, resulting in the vibration motor not being able to work normally and the electric toothbrush being damaged. This problem needs to be improved. Summary of the Invention

[0010] An embodiment of the present application provides an electric toothbrush to solve the problem of a connection line of a pressure sensor being broken due to rotation of an output shaft when the electric toothbrush is not in use.

[0011] Electric toothbrush, including:

[0012] Movement bracket;

[0013] A motor, comprising an output shaft, wherein a portion of the motor is located within the movement bracket, the output shaft passes through the movement bracket, and extends to the outside of the movement bracket;

[0014] an elastic member, at least partially connected to the movement bracket, the elastic member abutting against the outer peripheral wall of the output shaft, and configured to elastically deform according to the radial offset of the output shaft;

[0015] A pressure sensor is provided on the elastic member, and the pressure sensor and the circuit board are electrically connected via a connecting line. The pressure sensor is used to convert the elastic deformation into an electrical signal and transmit the electrical signal to the circuit board.

[0016] The electric toothbrush in the embodiment of the present application can provide a location for the installation of the motor by setting a movement bracket, and play a role in stabilizing the motor. By setting an elastic member and setting the elastic member to abut against the outer peripheral wall of the output shaft, when the output shaft of the electric toothbrush is pressed and deflected in the direction close to the elastic member, the elastic member will be squeezed, causing the elastic member to produce elastic deformation. By setting the pressure sensor on the elastic member, the elastic deformation of the elastic member can be conveniently converted into an electrical signal. Compared with the related art, in which the pressure sensor is directly connected to the output shaft, the technical solution of the present application can prevent the problem of the connecting line of the pressure sensor being broken due to the rotation of the output shaft when the electric toothbrush is not in use, so as to ensure the normal use of the electric toothbrush.

[0017] In a possible implementation, when the electric toothbrush is not in use, the output shaft can rotate 360°; the electric toothbrush adjusts the rotation angle of the output shaft through a Hall element.

[0018] With this setting, the output shaft can rotate 360°, and the control of the toothbrush is adjusted through the Hall element, so that the swing angle of the electric toothbrush is more precise, and can achieve swing control of the traditional brushing angle greater than 30°, which is conducive to meeting the user's usage needs.

[0019] In a possible implementation, a flexible member is included, and the flexible member is disposed between the output shaft and the elastic member to buffer contact between the output shaft and the elastic member.

[0020] In this way, by setting up a flexible part and setting the flexible part between the output shaft and the elastic part, the contact between the flexible part and the elastic part can be buffered, the output shaft and the elastic part can be avoided from direct contact, which may cause the vibration to be aggravated, and the noise generated by the contact between the output shaft and the elastic part can be reduced; and because the flexible part is relatively soft, the output shaft can be avoided from hard contact with the elastic part, further preventing the elastic part from being subjected to too rapid or too large a force, which may cause the elastic part to be unable to rebound to its initial state after deformation, thereby improving the service life of the elastic part and further enhancing the stability of the electric toothbrush.

[0021] In one possible implementation, the flexible member is a soft rubber sleeve. The soft rubber sleeve is disposed on the outside of the output shaft and is fixedly connected to the output shaft. The outer peripheral wall of the output shaft serves as the outer peripheral wall of the soft rubber sleeve, and the elastic member abuts against the outer peripheral wall of the soft rubber sleeve.

[0022] With this arrangement, by configuring the flexible member as a soft rubber sleeve, the output shaft indirectly abuts the outer peripheral wall of the output shaft through the soft rubber sleeve. This allows the elastic member to abut the soft rubber sleeve. This reduces wear on the output shaft and the elastic member when the motor vibrates, ensuring the structural strength of the output shaft and the elastic member and extending the service life of the electric toothbrush. Furthermore, the soft rubber sleeve is softer than the output shaft, which reduces noise generated by contact or friction between the output shaft and the elastic member when the motor vibrates, thereby improving the user experience.

[0023] In a possible implementation, the output shaft is provided with a mounting portion that is cooperatively connected to the soft rubber sleeve, wherein the soft rubber sleeve is cooperatively connected to the mounting portion.

[0024] In this way, a mounting portion is provided on the output shaft to provide an installation position for the soft rubber sleeve, and the installation stability of the soft rubber sleeve is improved, thereby improving the stability of the electric toothbrush; at the same time, when the electric toothbrush is produced and assembled, the setting of the mounting portion can better enable the soft rubber sleeve to be installed, which is conducive to improving installation and production efficiency.

[0025] In a possible implementation, the mounting portion is a groove structure provided on the outside of the output shaft, wherein the soft rubber sleeve is located in the groove structure, and the soft rubber sleeve and the groove structure are interference fit.

[0026] This arrangement, by configuring the mounting portion as a groove structure, simplifies the mounting portion's structure, thereby reducing the difficulty of manufacturing the output shaft. Furthermore, by configuring the mounting portion as a groove structure, at least a portion of the soft rubber sleeve can be embedded within the output shaft, thereby increasing the stability of the connection between the soft rubber sleeve and the output shaft. The soft rubber sleeve engages within the groove structure in the axial direction of the output shaft, further improving the stability of the connection between the soft rubber sleeve and the output shaft. Providing an interference fit between the soft rubber sleeve and the groove structure prevents the soft rubber sleeve from rotating relative to the output shaft, reducing the shaking of the soft rubber sleeve and thus reducing noise.

[0027] In a possible implementation, the flexible member is a soft rubber member, wherein the soft rubber member is attached to the elastic member, and the output shaft abuts against the elastic member by abutting against the soft rubber member. The hardness of the soft rubber member is less than that of the elastic member.

[0028] This arrangement, by configuring the flexible member as a soft rubber member, increases the design flexibility of the electric toothbrush. By attaching the soft rubber member to the elastic member, the output shaft abuts the elastic member through the soft rubber member, reducing wear on the elastic member caused by the output shaft. By setting the hardness of the soft rubber member to be lower than that of the elastic member, the noise generated by contact between the motor vibration and the elastic member can be reduced, improving the user experience.

[0029] In a possible implementation, the soft plastic part is a sheet-like structure.

[0030] In this way, by configuring the soft plastic part as a sheet structure, the structure of the soft plastic part can be simplified, the difficulty of processing the soft plastic part can be reduced, and the cost can be reduced.

[0031] In a possible implementation, the hardness of the flexible member ranges from 30 Shore A to 90 Shore A.

[0032] This arrangement prevents the flexible member from being too soft, i.e., less than 30 Shore A, and causing the flexible member to fit too closely to the curved surface of the output shaft when the output shaft contacts the flexible member. This would increase friction between the output shaft and the flexible member, potentially leading to abnormal noise in this situation, although the level of abnormal noise would be less than the noise generated by direct contact between the output shaft and the elastic member. It also prevents the flexible member from being too tight, which could interfere with the vibration of the output shaft. Similarly, it prevents the flexible member from being too soft, i.e., greater than 90 Shore A, causing excessive contact between the output shaft and the flexible member. This further prevents the output shaft from colliding with the flexible member and causing excessive noise when vibrating, although the level of noise would be less than the noise generated by direct contact between the output shaft and the elastic member. Setting the hardness range of the flexible member between 30 Shore A and 90 Shore A can basically ensure that the output shaft and the flexible member will not produce additional abnormal noise or noise. This hardness range is also suitable for the design of small electric toothbrushes.

[0033] In a possible implementation, the surface of the flexible member is provided with a texture to reduce the surface friction coefficient of the flexible member.

[0034] In this way, a texture is provided on the surface of the flexible part, which helps to reduce the surface friction coefficient of the flexible part. Therefore, when the output shaft contacts the flexible part, or the flexible part contacts the elastic part, the smaller friction coefficient is more conducive to the relative rotation of the output shaft and the flexible part, or the flexible part and the elastic part, which further helps to reduce the noise of the electric toothbrush.

[0035] In a possible implementation, the flexible member is thermoplastic polyurethane rubber.

[0036] In this way, the flexible part of thermoplastic polyurethane rubber is a TPU flexible part. The friction coefficient of this type of flexible part is relatively small, which is also beneficial to reducing the noise between the output shaft and the flexible part, or the flexible part and the elastic part, and improving the user experience.

[0037] In a possible implementation, the overpressure value of the output shaft is between 100g and 500g.

[0038] With this arrangement, when a user uses an electric toothbrush, when the force acting on the output shaft is between 100g and 500g, the pressure sensor will be triggered, and the electric toothbrush will remind the user that the brushing force is too strong; this meets the use needs of small-volume electric toothbrushes and is conducive to the use of small-volume electric toothbrushes.

[0039] In a possible implementation, the elastic member includes an elastic portion, wherein the output shaft abuts against the elastic portion, and the pressure sensor is fixedly connected to the elastic portion.

[0040] By configuring the elastic member to include an elastic portion and connecting the pressure sensor to the elastic portion, the pressure sensor can accurately generate an electrical signal based on the elastic deformation of the elastic portion, thereby improving the sensitivity of the elastic member, thereby improving the sensitivity of the pressure sensor and the accuracy of the pressure sensor's measurement data. Furthermore, the pressure sensor can be separated from the output shaft, unlike related art methods that directly connect the pressure sensor to the output shaft. This prevents the pressure sensor's connecting wire from breaking when the output shaft is rotating when not in use, thereby ensuring the normal use of the electric toothbrush.

[0041] In a possible implementation, the elastic member includes a first surface and a second surface facing away from each other, wherein the output shaft abuts the first surface, and the pressure sensor is located on the second surface.

[0042] In this way, by abutting the first surface of the elastic part against the outer peripheral wall of the output shaft and setting the pressure sensor on the second surface of the elastic part, it is convenient to abut the output shaft against the elastic part without hindering the pressure sensor from monitoring the elastic deformation of the elastic part. The output shaft and the pressure sensor can be set separately, and the setting method is simple, which can reduce the difficulty of processing and assembly.

[0043] In a possible implementation, the elastic member includes a fixing portion, wherein the fixing portion is fixedly connected to the elastic portion and is used to connect to the movement bracket.

[0044] This arrangement improves the stability of the elastic member by including a fixing portion connected to the elastic part and connecting it to the movement bracket via the fixing portion. Providing a separate fixing portion facilitates assembly of the elastic member without affecting the elasticity of the elastic part, thereby ensuring the sensitivity of the elastic member, thereby improving the sensitivity of the pressure sensor and enhancing the user experience.

[0045] In a possible implementation, the movement bracket includes a first bracket and a second bracket, wherein the first bracket and the second bracket are jointly engaged with the motor, and the first bracket and the second bracket are pressed together to fix the fixing portion.

[0046] In this arrangement, by configuring the movement bracket to include a first bracket and a second bracket, and by fastening the first bracket and the second bracket together to the motor, the motor can be more stably fixed inside the movement bracket. When a problem occurs with the motor and maintenance is required, this arrangement also facilitates the removal of the first bracket and the second bracket for maintenance of the motor. After maintenance is completed, the original first bracket and the second bracket can be used again, which can reduce maintenance costs compared to configuring the movement bracket as an integrated structure. By pressing the first bracket and the second bracket together to fix the fixing portion, the connection stability between the elastic member and the movement bracket can be improved.

[0047] In a possible implementation, the elastic member is a metal member.

[0048] By configuring the elastic member as a metal member, the elasticity of the elastic member can be improved, ensuring that the elastic member has good resilience, and preventing the elastic member from plastically deforming and causing failure of the elastic member. In other words, this can extend the service life of the elastic member.

[0049] In a possible implementation, the elastic member and the movement bracket are an integrated structure.

[0050] This arrangement, by providing the elastic member and the core support as an integrated structure, can improve the connection stability between the elastic member and the core support, thereby extending the service life of the elastic member. In addition, the core support can be obtained through an integrated molding process, eliminating the need to assemble the elastic member and the core support. In other words, this can reduce the assembly steps of the electric toothbrush, thereby reducing assembly difficulty and reducing costs.

[0051] In a possible implementation, the elastic member and the movement bracket are formed into an integral structure by injection molding.

[0052] With such an arrangement, by forming the elastic member and the movement bracket into an integrated structure through injection molding, the difficulty of processing the movement bracket can be reduced, thus saving costs.

[0053] In one possible implementation, the elastic member includes an elastic portion and fixed portions located at both ends of the elastic portion. An opening structure is provided between the fixed portion and the elastic portion. The opening structure has a smaller dimension in the axial direction of the output shaft than the elastic portion.

[0054] This arrangement, by providing an opening structure, increases the elasticity of the elastic member, allowing the elastic portion of the elastic member to deform more easily under pressure, thereby improving the accuracy of pressure sensor measurements. By setting the dimension of the opening structure in the axial direction of the output shaft smaller than the dimension of the elastic portion in the axial direction of the output shaft, a stable connection between the elastic portion and the fixed portion is ensured.

[0055] In one possible implementation, the electric toothbrush further includes a brush head. The brush head is disposed at one end of the output shaft extending to the outside of the movement bracket, and the brush head is plugged into and engaged with the output shaft. The brush head includes a brush portion, which is used for cleaning the oral cavity. The elastic member and pressure sensor are both disposed on a side of the output shaft facing away from the brush portion. When the brush head is subjected to pressure away from the brush portion, it drives the output shaft to deflect toward the elastic member.

[0056] In this way, the electric toothbrush can realize the function of cleaning the oral cavity by arranging the brush head. The brush head can be conveniently replaced by plugging and matching the brush head with the output shaft.

[0057] By setting a brush part on the brush head, the cleaning effect of the electric toothbrush can be improved. By setting the elastic part and the pressure sensor on the side of the output shaft away from the brush part, the positive pressure on the elastic part can be maximized when the user brushes his teeth, thereby improving the accuracy of the pressure sensor in measuring the brush head pressure.

[0058] The present application aims to solve the technical problem of high vibration and noise of electric toothbrushes, and provides an electric toothbrush, comprising an internal bracket, the internal bracket comprising a first bracket and a second bracket, the first bracket and the second bracket being interlocked and housing a motor and a battery;

[0059] The first bracket and the second bracket are both provided with a shock-absorbing part on the inner side close to the motor and the battery. The shock-absorbing part is integrally formed on the first bracket and the second bracket, and the shock-absorbing part contacts and buffers at least one of the motor or the battery.

[0060] The internal bracket for an electric toothbrush provided in the present application has a first bracket and a second bracket that interlock with each other and cover a motor and a battery, so that the first bracket, the second bracket, the motor and the battery have good integrity and a more compact structure. Since the structure is relatively tight, the resonance caused by vibration on each component is relatively small, which is conducive to the overall reduction of vibration and noise; and the shock-absorbing part integrally formed on the first bracket and the second bracket has good stability and can better realize the functions of shock absorption and noise reduction.

[0061] In one embodiment, the internal bracket includes a motor fixing portion and a battery fixing portion, the first bracket includes a portion of the motor fixing portion and a portion of the battery fixing portion, and the second bracket includes another portion of the motor fixing portion and another portion of the battery fixing portion;

[0062] The first bracket and the second bracket are buckled together to form a complete motor fixing portion and a battery fixing portion.

[0063] With such an arrangement, the motor fixing portion and the battery fixing portion formed by the first bracket and the second bracket, and thus the motor and the battery can be fixed to the first bracket and the second bracket more compactly, with stronger integrity, which is conducive to reducing vibration and noise, and further helps to improve the comfort of use.

[0064] In one embodiment, the motor fixing portion and the battery fixing portion of the second bracket are in a stepped transition.

[0065] When the second bracket is fastened to the first bracket, the width of the motor fixing portion formed by the second bracket and the first bracket in the fastening direction is smaller than the width of the battery fixing portion formed by the second bracket and the first bracket in the fastening direction.

[0066] Such a setting and stepped transition allow the relatively smaller motor and the relatively larger battery to be fixed more tightly by the first bracket and the second bracket, further improving the integrity of the internal bracket, motor and battery. When the motor vibrates, it is not easily transmitted to the handle shell due to the better integrity, which is also conducive to reducing noise and improving user comfort.

[0067] In one embodiment, the shock absorbing portion of the first bracket contacts the motor;

[0068] The shock absorbing portion of the second bracket contacts the motor and the battery.

[0069] With such an arrangement, the shock-absorbing portion of the first bracket and the shock-absorbing portion of the second bracket can contact the motor together and better, thereby providing sufficient shock-absorbing contact with the main vibration-generating motion source, which is beneficial to reducing vibration and noise; and the shock-absorbing portion of the second bracket supports the battery, playing a certain buffering role, which is beneficial to protecting the battery. Therefore, whether during the installation process or when the electric toothbrush falls when in use, the shock-absorbing portion can provide better protection for the battery, which is beneficial to increasing the service life of the electric toothbrush.

[0070] In one embodiment, the shock absorbing portion of the first bracket and the shock absorbing portion of the second bracket are circumferentially arranged around the motor;

[0071] The shock absorbing portion of the second bracket contacts one side of the battery.

[0072] With this arrangement, the motor is basically surrounded by the shock-absorbing part in the circumferential direction, so that no matter in which direction the motor vibrates, the vibration and noise can be reduced a little; and the shock-absorbing part of the second bracket contacts one side of the battery, which enables the battery to be effectively protected during the installation process, and there is no need to set up more buffer structures, which is conducive to reducing the volume and obtaining a relatively small electric toothbrush.

[0073] In one embodiment, one of the first bracket and the second bracket is provided with a notch portion, and the other is provided with a first limiting portion;

[0074] When the first bracket is buckled with the second bracket, the first limiting portion extends into the notch portion to guide and limit the installation of the first bracket and the second bracket.

[0075] With such an arrangement, when the first bracket and the second bracket are buckled and fixed, the first limiting portion is located in the notch portion, thereby guiding the installation and preventing the first bracket and the second bracket from being misaligned, ensuring that the first bracket and the second bracket can be accurately limited when fixed, which is beneficial to improving the connection stability between the first bracket and the second bracket.

[0076] In one embodiment, the internal bracket includes a top wall and a bottom wall, and the top wall and the bottom wall are jointly arranged on one of the first bracket and the second bracket; the top wall abuts the motor, and the bottom wall abuts the battery.

[0077] In this arrangement, the top wall supports the motor and the bottom wall supports the battery. The top wall and the bottom wall are simultaneously arranged on the first bracket or the second bracket, so that when the motor and the battery are installed, the motor and the battery can be fixed together on the same first bracket or the second bracket, thereby stabilizing the fixation of the motor and the battery. This also improves the integrity of the internal bracket, motor and battery, is beneficial to the fixation of the internal structure of the electric toothbrush, and is also beneficial to reducing the vibration and noise of the electric toothbrush, and facilitates the assembly operation of the electric toothbrush.

[0078] In one embodiment, the first bracket or the second bracket is provided with a first heat dissipation hole, and the first heat dissipation hole is used to dissipate heat from the motor;

[0079] The first bracket or the second bracket is provided with a second heat dissipation hole, and the second heat dissipation hole is used to dissipate heat from the motor and the battery.

[0080] With this arrangement, the first heat dissipation hole can dissipate heat from the motor better, and the second heat dissipation hole can dissipate heat from the motor and battery at the same time, which will reduce the internal temperature of the electric toothbrush when it is working, which is beneficial to protecting the product and further helping to increase its service life.

[0081] In one embodiment, the first bracket is provided with a first heat dissipation hole; the second bracket is provided with a second heat dissipation hole;

[0082] There are multiple second heat dissipation holes, which are spaced apart along the axial direction of the second bracket to dissipate heat for the motor and the battery.

[0083] With this arrangement, since the motor and the battery are fixed by the first bracket and the second bracket, the first heat dissipation hole can dissipate heat from the motor, and the multiple second heat dissipation holes can dissipate heat from the motor and the battery, further improving the service life of the motor and the battery, and facilitating the long-term and safe use of the electric toothbrush.

[0084] In one embodiment, the electric toothbrush further includes a circuit board, which is disposed on the first bracket. The first bracket has a cable hole, and the cable of the motor extends out of the cable hole to extend out of the internal bracket and electrically connect to the circuit board.

[0085] With this arrangement, the motor cable can extend out of the cable arrangement hole and then be connected to the circuit board, further enabling the electric toothbrush to electronically control the motor; the cable arrangement hole facilitates the circuit connection of the motor, which is beneficial for optimizing the internal structural design of the electric toothbrush, and thus facilitates obtaining a relatively small electric toothbrush.

[0086] In one embodiment, an electrical connection portion is provided on a side of the circuit board facing away from the first bracket, and a wire hole is also provided on the circuit board;

[0087] The cable of the motor extending out of the wire hole extends into one side of the first bracket of the circuit board through the wire hole and is connected to the electrical connection part.

[0088] With this arrangement, the circuit board is provided with a wire hole, which is arranged adjacent to the wire arrangement hole, so that the cable of the motor can extend from the wire arrangement hole of the first bracket, pass through the wire hole of the circuit board and extend into the side of the circuit board where the components are set, and be electrically connected to the electrical connection part on the circuit board, thereby reducing the structural complexity of the motor cable, making it easier to obtain a compact electric toothbrush, and further improving the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0090] FIG1 is a schematic structural diagram of an electric toothbrush provided in an embodiment of the present application;

[0091] FIG2 is a schematic diagram of an exploded structure of an electric toothbrush provided in an embodiment of the present application;

[0092] FIG3 is a schematic cross-sectional view of an electric toothbrush provided in an embodiment of the present application;

[0093] FIG4 is a schematic structural diagram of an elastic member of an electric toothbrush provided in an embodiment of the present application;

[0094] FIG5 is a schematic cross-sectional view of another electric toothbrush provided in an embodiment of the present application;

[0095] FIG6 is a schematic diagram of a partial structure of the core bracket of the electric toothbrush shown in FIG5 ;

[0096] FIG7 is a schematic cross-sectional view of another electric toothbrush provided in an embodiment of the present application;

[0097] FIG8 is a schematic cross-sectional view of another electric toothbrush provided in an embodiment of the present application;

[0098] FIG9 is a schematic diagram of a partial structure of an output shaft of an electric toothbrush provided in an embodiment of the present application;

[0099] FIG10 is a schematic diagram of the cross-sectional structure of the brush head and output shaft of the electric toothbrush provided in an embodiment of the present application;

[0100] FIG11 is a partial schematic diagram of the cross-sectional structure of the mating portion of the brush head of the electric toothbrush provided in an embodiment of the present application;

[0101] FIG12 is an exploded view of the electric toothbrush of the present application;

[0102] FIG13 is a schematic diagram of the three-dimensional structure of the electric toothbrush of the present application;

[0103] FIG14 is a schematic diagram of the installation structure of the output shaft, elastic member and flexible member of the present application;

[0104] FIG15 is an enlarged view of point A in FIG14 ;

[0105] FIG16 is a schematic diagram of the installation structure of the elastic member and the flexible member of the present application;

[0106] FIG17 is a schematic diagram of the three-dimensional structure of the elastic member of the present application;

[0107] FIG18 is a schematic diagram of the bottom structure of the flexible member of the present application;

[0108] FIG19 is a cross-sectional view of the electric toothbrush of the present application;

[0109] FIG20 is a schematic structural diagram of the limiting portion of the present application;

[0110] FIG21 is an enlarged view of point C in FIG20 ;

[0111] FIG22 is a schematic structural diagram of an electric toothbrush in one embodiment of the present application;

[0112] FIG23 is a schematic structural diagram of an internal bracket in one embodiment of the present application;

[0113] FIG24 is a schematic structural diagram of the first bracket, motor, and battery in FIG22 ;

[0114] FIG25 is a schematic structural diagram of the internal bracket shown in FIG23 from another perspective;

[0115] FIG26 is a schematic structural diagram of the first bracket in the internal bracket shown in FIG23;

[0116] FIG27 is a schematic structural diagram of the first bracket shown in FIG26 from another perspective;

[0117] FIG28 is a schematic diagram of the disassembled structure of the first bracket shown in FIG27;

[0118] FIG29 is a schematic diagram of a second bracket structure of the internal bracket shown in FIG23;

[0119] FIG30 is a schematic structural diagram of the second bracket shown in FIG29 from another perspective;

[0120] FIG31 is a schematic structural diagram of the second bracket shown in FIG30 from another perspective;

[0121] FIG32 is a schematic diagram of a partial structure of the internal bracket shown in FIG23;

[0122] FIG33 is a schematic structural diagram of an internal bracket and a circuit board in one embodiment of the present application;

[0123] FIG34 is a schematic structural diagram of an electric toothbrush provided in an embodiment of the present application;

[0124] FIG35 is a schematic diagram of the connection relationship between the first magnetic member and the rotating shaft provided in an embodiment of the present application;

[0125] FIG36 is a schematic diagram of the connection relationship between the second magnetic member and the rotating shaft provided in an embodiment of the present application;

[0126] FIG37 is a schematic diagram of the connection relationship between the third magnetic member and the rotating shaft provided in an embodiment of the present application;

[0127] FIG38 is a schematic structural diagram of a second electric toothbrush provided in an embodiment of the present application;

[0128] FIG39 is a schematic structural diagram of a third electric toothbrush provided in an embodiment of the present application;

[0129] FIG40 is a schematic diagram of the connection relationship between the fourth magnetic member and the rotating shaft provided in an embodiment of the present application;

[0130] FIG41 is a schematic diagram of the connection relationship between the fifth magnetic member and the rotating shaft provided in an embodiment of the present application;

[0131] FIG42 is a schematic diagram of the connection relationship between the sixth magnetic member and the rotating shaft provided in an embodiment of the present application;

[0132] Figure 43 is a front view of the elastic member of this embodiment;

[0133] FIG44 is a cross-sectional view at AA of this embodiment;

[0134] FIG45 is a perspective view of the elastic member of this embodiment;

[0135] FIG46 is a front view of another embodiment of the elastic member of this embodiment;

[0136] FIG47 is a cross-sectional view at point BB of this embodiment;

[0137] FIG48 is a perspective view of another embodiment of the elastic member of this embodiment;

[0138] FIG49 is a rear view of the motor of this embodiment;

[0139] FIG50 is a cross-sectional view at CC of this embodiment;

[0140] FIG51 is a partial enlarged view of point D of this embodiment;

[0141] FIG52 is a rear view of the motor housing of this embodiment;

[0142] FIG53 is a cross-sectional view at point EE of this embodiment.

[0143] Explanation of the accompanying drawings: 100, electric toothbrush; 110, brush head; 111, fitting part; 1111, limiting part; 1112, inclined surface; 1113, fixed end; 1114, free end; 112, brush part; 120, body; 130, movement bracket; 131, first bracket; 132, second bracket; 140, motor; 141, output shaft; 1411, mounting part; 142, assembly part; 1421, first assembly plane; 1422, second assembly plane; 1423, guide surface; 143, locking part; 150, elastic part; 151, fixing part; 152, elastic part; 153, connecting part; 154, first surface; 155, second surface; 156, opening structure; 160, pressure sensor; 161, connecting line; 170, flexible part; 180, circuit board. 200, bracket; 210, first bracket; 211, limiting portion; 2120, second bracket; 220, driving member; 2210, output shaft; 230, elastic member; 2310, fixing portion; 2311, end portion; 2312, connecting plate; 2313, notch; 2320, free portion; 2321, protruding end; 2322, raised structure; 2323, cantilever end; 2330, hollow gap; 240, sensor; 250, flexible member; 2510, limiting groove; 260, brush head; 270, circuit board; 280, connecting wire; 290, handle housing. 300, internal bracket; 310, motor fixing portion; 320, battery fixing portion; 330, first bracket; 3301, 3302, second limiting portion; 3303, top connection portion; 3304, clamping portion; 3305, auxiliary hole; 331, clamping portion; 332, notch portion; 333, top wall; 334, bottom wall; 3341, threaded portion; 335, stabilizing hole; 336, first heat dissipation hole; 337, cable hole; 338, reinforcement portion; 3381, protrusion; 339, bracket fixing portion; 340, second bracket; 341, clamping block; 342, first limiting portion; 343, stabilizing portion; 344, second heat dissipation hole; 350, shock absorbing portion; 351, shock absorbing protrusion; 3200, electric toothbrush; 3210, handle housing; 3220, motor; 3230, battery; 3240, circuit board; 3241, electrical connection portion; 3242, wire hole. 4100, stator; 4200, rotating shaft; 4210, magnetic structure; 4300, magnetic part; 4300a, magnetic column; 4300b, magnetic ring; 4400, induction component; 4500, motor housing; 4600, circuit board; 4610, card interface; 4700, bracket; 4710, clamping part; 4800, elastic part; 4810, bearing; 4900, axial drive mechanism.510-external connecting sleeve; 520-flexible connecting part; 521-second connecting part; 522-first connecting part; 530-inner connecting sleeve; 531-second hook; 5311-guide surface; 532-first clip; 533-first step; 540-bearing cover; 550-motor; 551-housing; 552-motor shaft; 553-circuit board; 554-bearing; 555-first rotor; 556-first stator; 557-second rotor; 558-second stator; 559-axial limiting protrusion. DETAILED DESCRIPTION

[0144] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0145] The following is a detailed description of the electric toothbrush provided in the embodiment of the present application in conjunction with the accompanying drawings. In order to solve the technical problem that the pressure sensor cable of the electric toothbrush is easily entangled or even broken, the present application provides an electric toothbrush, and Figures 1 to 11 correspond to the description of the solution. As shown in Figure 1, the embodiment of the present application provides an electric toothbrush 100, which may include a brush head 110 and a body 120, wherein the brush head 110 is located at one end of the body 120, the brush head 110 can be used to clean the oral cavity, and the body 120 can be used for the user to hold in hand, so that the user can more conveniently clean the oral cavity.

[0146] As shown in FIG. 2 , the electric toothbrush 100 provided in the embodiment of the present application may further include a movement bracket 130 , a motor 140 , an elastic member 150 , a pressure sensor 160 and a circuit board 180 .

[0147] 2 and 3 , the motor 140 may include an output shaft 141 , and a portion of the motor 140 is located within the movement bracket 130 . The output shaft 141 passes through the movement bracket 130 and extends to the outside of the movement bracket 130 .

[0148] In one possible implementation, when the electric toothbrush is not in use, the output shaft can rotate 360°; the electric toothbrush adjusts the rotation angle of the output shaft through the Hall element; in this way, the swing angle of the electric toothbrush is more precise, and can achieve swing control of the traditional brushing angle greater than 30°, which is conducive to meeting the user's usage needs.

[0149] It should be noted that the non-use state of the electric toothbrush 100 refers to a state in which the user is not brushing his teeth. For example, the non-use state of the electric toothbrush 100 may include a standby state when the electric toothbrush 100 is powered on, and also includes a shutdown state in which the electric toothbrush 100 is not powered on.

[0150] Continuing with Figures 2 and 3 , at least a portion of the elastic member 150 is connected to the movement bracket 130 . The elastic member 150 abuts the outer peripheral wall of the output shaft 141 . The elastic member 150 is configured to elastically deform in response to the radial offset (the y-direction in the figures) of the output shaft 141 . A pressure sensor 160 is disposed on the elastic member 150 , and the pressure sensor 160 is electrically connected to the circuit board 180 via a connecting wire 161 . The pressure sensor 160 is configured to convert the elastic deformation into an electrical signal and transmit the electrical signal to the circuit board 180 .

[0151] As shown in Figures 1 and 2 , the brush head 110 can be positioned at one end of the output shaft 141 extending to the outside of the movement bracket 130, and the brush head 110 is plugged into and mated with the output shaft 141. The brush head 110 includes a brush portion 112, which is used to clean the oral cavity. The elastic member 150 and the pressure sensor 160 are both positioned on the side of the output shaft 141 facing away from the brush portion 112. When the brush head 110 is subjected to pressure in a direction away from the brush portion 112, it drives the output shaft 141 to deflect toward the elastic member 150.

[0152] By providing a brush head 110, the electric toothbrush 100 can achieve the function of cleaning the oral cavity. By plugging and matching the brush head 110 with the output shaft 141, the brush head 110 can be easily replaced. By providing the brush head 110 with a brush portion 112, the cleaning effect of the electric toothbrush 100 can be improved. By arranging the elastic member 150 and the pressure sensor 160 on the side of the output shaft 141 facing away from the brush portion 112, the positive pressure applied to the elastic member 150 is maximized when the user brushes their teeth, thereby improving the accuracy of the pressure sensor 160 in measuring the pressure of the brush head 110.

[0153] In some embodiments, a prompt module may be provided on the circuit board 180 , and the prompt module may send corresponding prompt information according to the electrical signal transmitted by the pressure sensor 160 , for example, it may remind the user to reduce pressure and exert more force.

[0154] Exemplarily, the pressure sensor 160 can be attached to the side of the elastic member 150 facing away from the output shaft 141, wherein the pressure sensor 160 and the elastic member 150 can be fixed by bonding, welding, clamping or fastener connection. In the embodiment of the present application, the connection method between the pressure sensor 160 and the elastic member 150 is not further limited.

[0155] It should be noted that the outer peripheral wall of the output shaft 141 refers to the outer surface other than the end of the output shaft 141. In the embodiment of the present application, the shape of the outer peripheral wall of the output shaft 141 is not further limited.

[0156] The electric toothbrush 100 in the embodiment of the present application, by providing a movement bracket 130, can provide a location for the installation of the circuit board 180 and the motor 140, and also play a role in stabilizing the motor 140. By providing an elastic member 150 and placing the elastic member 150 in contact with the outer peripheral wall of the output shaft 141, when the output shaft 141 of the electric toothbrush 100 is pressed and deflected toward the elastic member 150, the elastic member 150 is squeezed, causing the elastic member 150 to elastically deform. By providing the pressure sensor 160 on the elastic member 150, the elastic deformation of the elastic member 150 can be conveniently converted into an electrical signal. Compared to the related art that directly connects the pressure sensor 160 to the output shaft 141, the technical solution of the present application can prevent the problem of the connecting wire 161 of the pressure sensor 160 being broken due to the rotation of the output shaft 141 when the electric toothbrush 100 is not in use, thereby ensuring the normal use of the electric toothbrush 100.

[0157] Continuing to refer to Figures 2 and 3, the electric toothbrush 100 provided in the embodiment of the present application may further include a flexible member 170, which is arranged between the output shaft 141 and the elastic member 150 to buffer the contact between the output shaft 141 and the elastic member 150.

[0158] By providing a flexible member 170 and arranging the flexible member 170 between the output shaft 141 and the elastic member 150, the contact between the flexible member 170 and the elastic member 150 can be buffered, thereby avoiding direct contact between the output shaft 141 and the elastic member 150, thereby aggravating vibration and reducing noise generated by the contact between the output shaft 141 and the elastic member 150; and since the flexible member 170 is relatively soft, the output shaft 141 is avoided from hard contact with the elastic member 150, thereby further preventing the elastic member 150 from being subjected to excessive force or excessive force, thereby preventing the elastic member 150 from being unable to rebound to its initial state after deformation, thereby improving the service life of the elastic member 150 and further enhancing the stability of the electric toothbrush 100.

[0159] In one possible implementation, the flexible member 170 may be a soft rubber sleeve. The soft rubber sleeve is provided on the outside of the output shaft 141, and the soft rubber sleeve is fixedly connected to the output shaft 141. The output shaft 141 indirectly abuts against the outer peripheral wall of the output shaft 141 through the soft rubber sleeve. By setting the flexible member 170 as a soft rubber sleeve, the outer peripheral wall of the soft rubber sleeve is the outer peripheral wall of the output shaft 141, so that the elastic member 150 can abut against the soft rubber sleeve. In this way, when the motor 140 vibrates, the wear of the output shaft 141 and the elastic member 150 can be reduced, the structural strength of the output shaft 141 and the elastic member 150 can be ensured, and the service life of the electric toothbrush 100 can be extended. In addition, the hardness of the soft rubber sleeve is softer than that of the output shaft 141, which can reduce the noise generated by the contact or friction between the output shaft 141 and the elastic member 150 when the motor 140 vibrates, thereby improving the user experience.

[0160] For example, as shown in FIG2 , the output shaft 141 is provided with a mounting portion 1411 that is mated with the soft rubber sleeve. The soft rubber sleeve is mated with the mounting portion 1411. The mounting portion 1411 is a groove structure disposed on the outside of the output shaft 141. In the axial direction of the output shaft 141 (the x-direction in the figure), the size of the groove structure is greater than or equal to the size of the soft rubber sleeve. The soft rubber sleeve is located within the groove structure, and the soft rubber sleeve and the groove structure have an interference fit.

[0161] The mounting portion 1411 is provided on the output shaft 141 to provide a mounting location for the soft rubber sleeve, improve the installation stability of the soft rubber sleeve, and enhance the stability of the electric toothbrush 100. Furthermore, during the production and assembly of the electric toothbrush 100, the mounting portion 1411 facilitates the installation of the soft rubber sleeve, thereby improving installation and production efficiency. By providing the mounting portion 1411 with a groove structure, the structure of the mounting portion 1411 can be simplified, thereby reducing the difficulty of manufacturing the output shaft 141.

[0162] In addition, by configuring the mounting portion 1411 as a groove structure, at least a portion of the soft rubber sleeve can be embedded in the output shaft 141, thereby increasing the connection stability between the soft rubber sleeve and the output shaft 141. By configuring the size of the groove structure in the axial direction of the output shaft 141 to be larger than or equal to that of the soft rubber sleeve, the soft rubber sleeve can be engaged in the groove structure in the axial direction of the output shaft 141, thereby increasing the connection stability between the soft rubber sleeve and the output shaft 141.

[0163] By providing interference fit between the soft rubber sleeve and the groove structure, the soft rubber sleeve can be prevented from rotating relative to the output shaft 141, thereby reducing shaking of the soft rubber sleeve and lowering noise.

[0164] It should be noted that a lever structure with the elastic member 150 as the fulcrum is formed between the output shaft 141, the brush head 110 and the elastic member 150, and the flexible member 170 is used as the boundary. In the axial direction of the output shaft 141, the part of the brush head 110 from the end of the output shaft 141 to the elastic member 150 is the first lever arm part, and the part from the motor 140 located in the movement bracket 130 to the elastic member 150 is the second lever arm part. When the external force applied to the brush head 110 is greater than the preset value, the first lever arm part, based on the elastic deformation ability of the elastic member 150, causes the pressure sensor 160 located on the elastic member 150 to generate an electrical signal and transmit it to the circuit board 180. The second lever arm part remains unchanged because it is in the movement bracket 130, thereby realizing accurate detection of the pressure applied to the brush head 110.

[0165] It should be noted that, in the embodiment of the present application, the hardness and thickness of the flexible member 170 are not limited and can be set specifically according to the requirements of the electric toothbrush 100.

[0166] In one possible implementation, the hardness of the flexible member 170 ranges from 30 Shore A to 90 Shore A. This configuration prevents the flexible member 170 from being too soft, i.e., less than 30 Shore A, causing the flexible member 170 to fit too closely against the curved surface of the output shaft 141 when the output shaft 141 abuts the flexible member 170. This would increase friction between the output shaft 141 and the flexible member 170, potentially leading to abnormal noise, although the level of this noise would be lower than the noise generated by direct contact between the output shaft 141 and the elastic member 150. It also prevents the flexible member 170 from interfering with the vibration of the output shaft 141 due to excessive contact. Similarly, it prevents the flexible member 170 from being too soft, i.e., greater than 90 Shore A, causing excessive contact between the output shaft 141 and the flexible member 170. This further prevents the output shaft 141 from colliding with the flexible member 170 when vibrating, causing excessive noise, although the level of this noise would be lower than the noise generated by direct contact between the output shaft 141 and the elastic member 150. When the hardness range of the flexible member 170 is set to 30 Shore A to 90 Shore A, it can basically ensure that the output shaft 141 and the flexible member 170 will not generate additional abnormal sounds or noises. At the same time, this hardness range is also suitable for the design of a small-volume electric toothbrush 100.

[0167] In one possible implementation, the surface of the flexible member 170 is textured to reduce the surface friction coefficient of the flexible member 170. This configuration helps reduce the surface friction coefficient of the flexible member 170. Consequently, when the output shaft 141 contacts the flexible member 170, or when the flexible member 170 contacts the elastic member 150, the lower friction coefficient facilitates relative rotation between the output shaft 141 and the flexible member 170, or between the flexible member 170 and the elastic member 150, further reducing noise generated by the electric toothbrush 100. The direction of the texture can be perpendicular to the axis of the output shaft 141 of the motor 140. This allows the texture to essentially create point contact with the output shaft 141, reducing friction and further facilitating vibration of the output shaft 141.

[0168] In one possible implementation, the flexible part 170 is thermoplastic polyurethane rubber, that is, TPU flexible part 170. This type of flexible part 170 has a relatively small friction coefficient, which is also beneficial to reducing the noise between the output shaft and the flexible part 170, or the flexible part 170 and the elastic part 150, thereby improving the user experience.

[0169] In one possible implementation, the overpressure value of the output shaft 141 is between 100g and 500g. With this configuration, when a user uses the electric toothbrush 100 and the force acting on the output shaft 141 is between 100g and 500g, the pressure sensor 160 is triggered, and the electric toothbrush 100 reminds the user that the brushing force is too strong. This meets the use requirements of a small-sized electric toothbrush 100 and is conducive to the use of a small-sized electric toothbrush 100.

[0170] Continuing to refer to Figures 2 and 3, the movement bracket 130 may include a first bracket 131 and a second bracket 132. Among them, the first bracket 131 and the second bracket 132 are jointly engaged with the motor 140. For example, the first bracket 131 and the second bracket 132 are arranged relative to each other, and a accommodating cavity is formed between the first bracket 131 and the second bracket 132. The motor 140 is located in the accommodating cavity, and the first bracket 131 and the second bracket 132 are engaged with each other and fix the motor 140 in the accommodating cavity. Part of the structure of the output shaft 141 extends axially to the outside of the accommodating cavity. The circuit board 180 is arranged on the outside of the first bracket 131 or the second bracket 132. For example, the circuit board 180 is arranged on the outside of the second bracket 132 (as shown in Figure 2).

[0171] By setting the movement bracket 130 to include a first bracket 131 and a second bracket 132, and snapping the first bracket 131 and the second bracket 132 together to engage the motor 140, the motor 140 can be more stably fixed inside the movement bracket 130. When a problem occurs with the motor 140 and maintenance is required, this setting can also facilitate the disassembly of the first bracket 131 and the second bracket 132 to facilitate maintenance of the motor 140. After the maintenance is completed, the original first bracket 131 and the second bracket 132 can continue to be used. Compared with setting the movement bracket 130 as an integrated structure, this can reduce maintenance costs.

[0172] As shown in Figure 3, the first bracket 131 and the second bracket 132 are pressed together to fix a portion of the elastic member 150, so that the elastic member 150 is fixedly connected to the core bracket 130. By pressing the first bracket 131 and the second bracket 132 together to fix the elastic member 150, the connection stability of the elastic member 150 and the core bracket 130 can be improved.

[0173] In a possible implementation, as shown in Figure 4, the elastic member 150 and the core bracket 130 are separate structures. The elastic member 150 and the core bracket 130 are connected by welding, bonding, riveting, fastener connection or clamping.

[0174] By configuring the elastic member 150 and the core support 130 as a split structure, the design flexibility of the elastic member 150 can be improved. In this way, when the elastic member 150 fails, the elastic member 150 can be removed for repair or replacement, which can reduce maintenance costs compared to replacing the entire core support 130. In addition, by configuring the elastic member 150 and the core support 130 as a split structure, the elastic member 150 and the core support 130 can also be configured as structures of different materials. For example, the elastic member 150 can be configured as a metal material with good elasticity, while the core support 130 can be configured as a plastic material with relatively poor elasticity. This can improve the design flexibility of the electric toothbrush 100 and reduce costs.

[0175] Exemplarily, the elastic member 150 may include an elastic portion 152 and a fixing portion 151. The first bracket 131 and the second bracket 132 are pressed together to fix the fixing portion 151. The elastic portion 152 is located between the two fixing portions 151. The output shaft 141 abuts against the elastic portion 152. The pressure sensor 160 is fixedly connected to the elastic portion 152 (see FIG. 3 ).

[0176] By pressing the first bracket 131 and the second bracket 132 together to fix the fixing portion 151 , the connection stability between the elastic member 150 and the movement bracket 130 can be improved.

[0177] By providing the elastic member 150 with a fixing portion 151 connected to the elastic portion 152 and connecting the fixing portion 151 to the movement bracket 130, the stability of the elastic member 150 is improved. Providing a separate fixing portion 151 facilitates assembly of the elastic member 150 without affecting the elasticity of the elastic portion 152, thereby ensuring the sensitivity of the elastic member 150 and, in turn, improving the sensitivity of the pressure sensor 160 and enhancing the user experience.

[0178] By configuring the elastic member 150 to include an elastic portion 152 and connecting the pressure sensor 160 to the elastic portion 152, the pressure sensor 160 can accurately generate an electrical signal based on the elastic deformation of the elastic portion 152, thereby improving the sensitivity of the elastic member 150, thereby improving the sensitivity of the pressure sensor 160 and the accuracy of the data measured by the pressure sensor 160. Furthermore, the pressure sensor 160 can be provided separately from the output shaft 141. Compared to the related art method of directly connecting the pressure sensor 160 to the output shaft 141, this prevents the connection line 161 of the pressure sensor 160 from breaking due to the rotation of the output shaft 141 when the electric toothbrush 100 is not in use, thereby ensuring the normal use of the electric toothbrush 100.

[0179] Exemplarily, a connecting portion 153 can be provided between the fixed portion 151 and the elastic portion 152, wherein one end of the connecting portion 153 is connected to the fixed portion 151, and the other end is connected to the elastic portion 152. An arc-shaped transition structure can be provided between the connecting portion 153 and the fixed portion 151 and the elastic portion 152. This can make the connecting portion 153 smoother, reduce sharp right angles, and prevent scratches on other components or staff when assembling the electric toothbrush 100, thereby improving safety.

[0180] In some embodiments, the elastic portion 152 may include a first surface 154 and a second surface 155 facing away from each other, wherein the output shaft 141 abuts against the first surface 154, and the pressure sensor 160 is located on the second surface 155. Exemplarily, the elastic portion 152 is a plate-shaped structure.

[0181] By bringing the first surface 154 of the elastic portion 152 into contact with the outer peripheral wall of the output shaft 141, the pressure sensor 160 is arranged on the second surface 155 of the elastic member 150. This makes it convenient to bring the output shaft 141 into contact with the elastic member 150 without hindering the pressure sensor 160 from monitoring the elastic deformation of the elastic member 150. The output shaft 141 and the pressure sensor 160 can also be arranged separately, and the arrangement is simple, which can reduce the difficulty of processing and assembly.

[0182] As shown in Figure 4, in the direction perpendicular to the first surface 154 of the elastic part 152, the fixing part 151 and the elastic part 152 are located in different planes, that is, in the direction perpendicular to the first surface 154 of the elastic part 152, there is a certain height difference between the fixing part 151 and the elastic part 152, so that the elastic part 152 that undergoes elastic deformation and the fixing part 151 used for fixing can be set separately, preventing the fixing part 151 from being deformed when the elastic part 152 is deformed, thereby preventing the fixing part 151 from being deformed when the elastic part 152 is deformed, thereby causing an unstable connection between the fixing part 151 and the movement bracket 130.

[0183] Of course, in other embodiments, the elastic member 150 may be configured as other structures. For example, the elastic member 150 may be configured as a flat plate or sheet structure, with the fixing portion 151 and the elastic portion 152 located in the same plane. In the embodiments of the present application, the specific structure of the elastic member 150 is not further limited.

[0184] For example, the elastic member 150 may be a metal member.

[0185] By configuring the elastic member 150 as a metal member, the elasticity of the elastic member 150 can be improved, ensuring that the elastic member 150 has good resilience, and preventing the elastic member 150 from plastically deforming and causing failure of the elastic member 150. In other words, this can extend the service life of the elastic member 150.

[0186] Of course, in other embodiments, the elastic member 150 may also be a non-metallic member with good elasticity. In the embodiment of the present application, the material of the elastic member 150 is not further limited.

[0187] It should be noted that, in some embodiments, the elastic member 150 can be a separate component, which is fixedly connected to the movement bracket 130 through a specific connection method. Of course, in other embodiments, the elastic member 150 can also be set as an integrated structure with the movement bracket 130, that is, the elastic member 150 can be a part of the movement bracket 130.

[0188] As shown in FIG. 5 , in a possible implementation, the elastic member 150 and the movement bracket 130 are an integrated structure.

[0189] By providing the elastic member 150 and the core support 130 as an integrated structure, the connection between the elastic member 150 and the core support 130 can be improved, thereby extending the service life of the elastic member 150. In addition, the core support 130 can be obtained by an integrated molding method, eliminating the need to assemble the elastic member 150 and the core support 130. In other words, this can reduce the assembly steps of the electric toothbrush 100, thereby reducing the assembly difficulty and cost.

[0190] In a possible implementation, the elastic member 150 and the movement bracket 130 are formed into an integral structure by injection molding.

[0191] By forming the elastic member 150 and the movement bracket 130 into an integrated structure through injection molding, the difficulty of processing the movement bracket 130 can be reduced and the cost can be saved.

[0192] As shown in Figure 6, the elastic member 150 includes an elastic portion 152 and fixed portions 151 located at both ends of the elastic portion 152. The fixed portions 151 are integrally formed with the movement bracket 130. An opening structure 156 is provided between the fixed portion 151 and the elastic portion 152. For example, two opening structures 156 are located at either end of the elastic portion 152. The opening structure 156 is smaller than the elastic portion 152 in the axial direction of the output shaft 141 to ensure a stable connection between the elastic portion 152 and the fixed portion 151.

[0193] Illustratively, in the axial direction of the output shaft 141 , the elastic member 150 has a symmetrical structure.

[0194] By providing the opening structure 156 , the elasticity of the elastic member 150 can be improved, so that the elastic portion 152 of the elastic member 150 can be more easily deformed under pressure, thereby improving the measurement accuracy of the pressure sensor 160 .

[0195] It should be noted that, in the embodiment of the present application, the shape of the opening structure 156 can be a quadrilateral, a circle, etc. In the embodiment of the present application, the specific shape of the opening structure 156 is not further limited.

[0196] The above embodiment introduces a solution in which the flexible member 170 is a soft rubber sleeve. Of course, in other embodiments, the flexible member 170 may also be of other structures and may also be arranged at other positions.

[0197] As shown in Figures 7 and 8, the flexible member 170 is a soft rubber member. The soft rubber member is attached to the elastic member 150, and the output shaft 141 abuts against the elastic member 150 by abutting against the soft rubber member. The hardness of the soft rubber member is less than that of the elastic member 150.

[0198] By configuring the flexible member 170 as a soft rubber member, the design flexibility of the electric toothbrush 100 can be increased. By attaching the soft rubber member to the elastic member 150, the output shaft 141 abuts against the elastic member 150 through the soft rubber member, thereby reducing wear on the elastic member 150 caused by the output shaft 141. By configuring the hardness of the soft rubber member to be lower than that of the elastic member 150, the noise generated by the vibration of the motor 140 and its contact with the elastic member 150 can be reduced, thereby improving the user experience.

[0199] For example, the soft plastic member may be a sheet-like structure. That is, the flexible member 170 is a sheet-like structure.

[0200] By configuring the soft plastic component as a sheet, the structure of the soft plastic component can be simplified. The mounting portion 1411 is no longer required on the output shaft 141, simplifying the structure of the output shaft 141 and reducing the difficulty of manufacturing the soft plastic component and the output shaft 141, thereby reducing costs. Furthermore, the deformation of the output shaft 141 can be more directly transmitted to the pressure sensor 160 on the elastic component 150, improving the accuracy of pressure detection and enhancing the user experience.

[0201] In the embodiment of the present application, the soft plastic member can be fixedly connected to the elastic member 150 through integral injection molding, bonding, or other methods. When the elastic member 150 includes an elastic portion 152 and a fixing portion 151, the soft plastic member can be bonded to the elastic portion 152 of the elastic member 150. Because the elastic portion 152 abuts the output shaft 141, placing the soft plastic member only on the elastic portion 152 can reduce the size of the elastic member 150, thereby reducing costs. The size of the soft plastic member is not further limited.

[0202] Exemplarily, the flexible member 170 may be a soft plastic member, a rubber member, a silicone member, a plastic member, etc. In the embodiment of the present application, the material of the flexible member 170 is not further limited.

[0203] Of course, in other embodiments, the flexible member 170 may have other structures or be located in other positions. In the present embodiment, the structure and location of the flexible member 170 are not further limited. As long as the flexible member 170 is located between the output shaft 141 and the elastic member 150 and the hardness of the flexible member 170 is less than that of the output shaft 141, it can buffer the contact between the output shaft 141 and the elastic member 150.

[0204] The connection relationship between the brush head 110 and the output shaft 141 will be described below with reference to the accompanying drawings.

[0205] In one possible implementation, as shown in FIG9 , an assembly portion 142 is provided on the output shaft 141 , wherein the brush head 110 includes a mating portion 111 (see FIG10 ) connected to the assembly portion 142 . The assembly portion 142 and the mating portion 111 are plug-fitted.

[0206] By setting an assembly part 142 on the output shaft 141 and a matching part 111 on the brush head 110, it is convenient to connect the brush head 110 and the output shaft 141. By plugging the assembly part 142 and the matching part 111 into each other, the difficulty of assembling the assembly part 142 and the matching part 111 can be reduced, the difficulty of users replacing the brush head 110 can be reduced, and the user experience can be improved.

[0207] Exemplarily, the assembly portion 142 is located at the end of the output shaft 141. The assembly portion 142 includes a first assembly plane 1421 and a second assembly plane 1422 that are radially opposite to each other along the output shaft 141. The radial dimension of the first assembly plane 1421 in the output shaft 141 is different from the radial dimension of the second assembly plane 1422 in the output shaft 141.

[0208] Illustratively, a dimension of the first assembly plane 1421 in the radial direction of the output shaft 141 is greater than a dimension of the second assembly plane 1422 in the radial direction of the output shaft 141 .

[0209] By positioning the assembly portion 142 at the end of the output shaft 141, processing is facilitated. By configuring the assembly portion 142 to include a first assembly plane 1421 and a second assembly plane 1422, the brush head 110 can be prevented from rotating relative to the output shaft 141, preventing the brush head 110 from loosening, ensuring proper operation of the electric toothbrush 100, and enhancing the user experience. By setting the radial dimension of the first assembly plane 1421 to be different from the radial dimension of the second assembly plane 1422, the brush head 110 can be prevented from being installed in the wrong direction.

[0210] In one possible implementation, a guide surface 1423 is provided on at least one of the first assembly plane 1421 and the second assembly plane 1422. The guide surface 1423 is located at the end of the assembly portion 142 facing away from the movement bracket 130. As it moves from the motor 140 toward the brush head 110, the guide surface 1423 gradually tilts toward the central axis of the output shaft 141. For example, the guide surface 1423 is located at the end of the first assembly plane 1421 facing away from the movement bracket 130.

[0211] By setting a guide surface 1423 on at least one of the first assembly plane 1421 and the second assembly plane 1422, and setting the guide surface 1423 as a slope, the slope can reduce friction when assembling the assembly part 142 with the mating part 111, thereby reducing the difficulty of installing the brush head 110 and the output shaft 141.

[0212] As shown in Figure 10, the output shaft 141 is further provided with a snap-fit ​​portion 143. A stopper 1111 is provided within the mating portion 111, connected to the snap-fit ​​portion 143. The stopper 1111 is elastically connected to the mating portion 111 in the radial direction of the output shaft 141. When the brush head 110 is mated with the output shaft 141, the snap-fit ​​portion 143 engages with the stopper 1111.

[0213] By providing the engaging portion 143 and the matching portion 111, the connection stability between the brush head 110 and the output shaft 141 can be improved, preventing the brush head 110 from accidentally falling off. By elastically connecting the limiting portion 1111 and the matching portion 111 in the radial direction of the output shaft 141, when the assembly portion 142 and the matching portion 111 are connected, the limiting portion 1111 can be expanded along the radial direction of the output shaft 141, so that the limiting portion 1111 and the matching portion 111 are matched and connected, reducing the difficulty of installing the brush head 110 and improving the user experience.

[0214] In one possible implementation, one of the engaging portion 143 and the limiting portion 1111 is a recessed engagement groove, and the other is a protrusion. The shapes of the recessed engagement groove and the protrusion match, and when the brush head 110 is mated with the output shaft 141, the protrusion engages with the recessed engagement groove. For example, the engaging portion 143 is a recessed engagement groove, and the limiting portion 1111 is a protrusion.

[0215] By providing the engaging portion 143 and the limiting portion 1111 with engaging protrusions or engaging grooves, the difficulty of processing the engaging portion 143 and the limiting portion 1111 can be reduced, thereby reducing the cost.

[0216] In one possible implementation, as shown in FIG11 , the engaging protrusion of the limiting portion 1111 includes two opposing inclined surfaces 1112 in the axial direction of the output shaft 141. The engaging protrusion includes a fixed end 1113 and a free end 1114. The distance between the two inclined surfaces 1112 gradually decreases in the direction from the fixed end 1113 to the free end 1114 of the engaging protrusion.

[0217] By providing the engaging protrusion with two inclined surfaces 1112 , when assembling the brush head 110 and the output shaft 141 , the assembly force can be saved, which makes it convenient for the user to replace the brush head 110 and improves the user experience.

[0218] Exemplarily, the limiting portion 1111 is movably arranged relative to the matching portion 111 and is elastically connected so that when the brush head 110 is assembled with the output shaft 141, the limiting portion 1111 can move along the outer wall of the assembly portion 142 to reduce the assembly force. When installed to a specific position, the limiting portion 1111 can be engaged and connected with the engaging portion 143.

[0219] It should be noted that, in some other embodiments, the locking portion 143 and the limiting portion 1111 may also be set as other structures. In the embodiment of the present application, the specific structures of the locking portion 143 and the limiting portion 1111 are not further limited.

[0220] In some existing electric toothbrushes, the output shaft of the vibration motor can rotate at a large angle, for example, more than 30 degrees, or even 360 degrees. This large rotation of the output shaft can easily cause the connecting wire of the pressure sensor located on the output shaft to become entangled on the output shaft, causing the connecting wire of the pressure sensor to break, resulting in the vibration motor not being able to operate normally and the electric toothbrush being damaged. In other words, some existing electric toothbrushes cannot implement the pressure sensing solution. The present application also provides an electric toothbrush for solving the problem of the connecting wire of the pressure sensor breaking due to output shaft rotation. Figures 11 to 21 correspond to the description of this solution.

[0221] As shown in FIG11 , the electric toothbrush includes a brush head and a handle. The brush head is located at one end of the handle and can be used to clean the oral cavity. The handle can be held by the user to facilitate oral cleaning. The handle has a handle housing 290 for holding and protecting the user.

[0222] As shown in Figures 12 to 21, the electric toothbrush includes a bracket 200, a driving member 220, an elastic member 230 and a sensor 240. The driving member 220 is partially arranged inside the bracket 200, and the output shaft 2210 of the driving member 220 extends out of the bracket 200. At least part of the elastic member 230 is hollowed out, and part of the output shaft 2210 abuts the hollow part of the elastic member 230. The sensor 240 is arranged on one side of the elastic member 230. The sensor 240 is used to convert the elastic deformation of the elastic member 230 into an electrical signal.

[0223] The electric toothbrush also includes a controller arranged on the bracket 200, which is connected to the sensor 240 and the driving member 220 via a connecting line. The sensor 240 is used to convert the elastic deformation of the elastic member 230 into an electrical signal and send it to the controller inside the electric toothbrush. The controller processes the electrical signal to realize pressure detection of the electric toothbrush.

[0224] It can be understood that when the electric toothbrush in this embodiment is not in use, the output shaft 2210 can rotate 360°; the electric toothbrush adjusts the rotation angle of the output shaft 2210 through the Hall element; in this way, the swing angle of the electric toothbrush is more precise, and can achieve swing control of the traditional brushing angle greater than 30°, which is conducive to meeting the user's usage needs.

[0225] The non-use state of the electric toothbrush refers to a state in which the user is not brushing his teeth. For example, the non-use state of the electric toothbrush may include a standby state when the electric toothbrush is powered on, and also includes a shutdown state in which the electric toothbrush is not powered on.

[0226] Specifically, the electric toothbrush of the present application employs a sensor 240 disposed on one side of the elastic member 230, conveniently converting the elastic deformation of the elastic member 230 into an electrical signal. Compared to related art techniques in which the sensor 240 (e.g., a pressure sensor) is directly connected to the output shaft 2210, the technical solution of the present application prevents the connection cable 280 of the sensor 240 from breaking due to the rotation of the output shaft 2210 when the electric toothbrush is not in use, thereby ensuring normal use of the electric toothbrush.

[0227] The driving component 220 is a motor, the controller is a circuit board 270 , and the circuit board 270 is disposed inside the bracket 200 .

[0228] In this embodiment, the bracket 200 is disposed inside the handle housing, and the bracket 200 is used to provide installation for the driving member 220 and the elastic member 230 .

[0229] The bracket 200 supports and fixes the driving member 220, and provides an installation position for the elastic member 230, the controller and the sensor 240. In this embodiment, as shown in Figure 12, the bracket 200 includes a first bracket 210 and a second bracket 2120. The first bracket 210 and the second bracket 2120 are snapped together to form an installation cavity, and the first bracket 210 and the second bracket 2120 form an opening at the end after snapping together. Part of the driving member 220 is arranged inside the installation cavity, and the output shaft 2210 passes through the opening at the rear end of the first bracket 210 and the second bracket 2120, and the elastic member 230 is located at the position of the opening at the rear end after snapping together.

[0230] In this embodiment, the first bracket 210 forms a partial opening, and the second bracket 2120 forms a partial opening, so that the first bracket 210 and the second bracket 2120 are buckled together to form a complete opening. It is understood that in other embodiments, a complete opening can also be formed for the first bracket 210 or the second bracket 2120 alone, and there is no specific limitation. It should be noted that the elastic member 230 is located at the opening at the end of the first bracket 210 and the second bracket 2120, that is, it can be located at the side wall position of the opening, or it can be around the side wall forming the opening. For example, the first bracket 210 and the second bracket 2120 form an end wall at the end, and the protrusion structure relative to the end wall forms the opening. It is understood that the protrusion structure relative to the end wall should be understood as the periphery of the opening.

[0231] The handle shell is covered on the outside of the first bracket 210 and the second bracket 2120 to fasten the first bracket 210 and the second bracket 2120. The driving member 220, the elastic member 230 and the circuit board 270 are arranged inside the installation cavity formed by the first bracket 210 and the second bracket 2120.

[0232] The first bracket 210 and the second bracket 2120 may be fastened together in a detachable manner through a snap-fit ​​structure, or the first bracket 210 and the second bracket 2120 may be fastened together and fixed by fasteners, such as bolts.

[0233] During the assembly process of the electric toothbrush, the driving member 220, the elastic member 230, the sensor 240 and the controller can be installed and fixed to the corresponding first bracket 210 and the second bracket 2120 first, and then the first bracket 210 and the second bracket 2120 are buckled together, and the handle shell is covered on the outside of the first bracket 210 and the second bracket 2120 in the buckled state to complete the handle installation.

[0234] By providing the first bracket 210 and the second bracket 2120, and by engaging the first bracket 210 and the second bracket 2120 together with the driving member 220, the driving member 220 can be more stably fixed inside the installation cavity. In addition, when a problem occurs with the driving member 220 and maintenance is required, this arrangement can also facilitate the disassembly of the first bracket 210 and the second bracket 2120 to facilitate maintenance of the driving member 220. After the maintenance is completed, the original first bracket 210 and the second bracket 2120 can continue to be used. Compared with setting the movement bracket as an integrated structure, this can reduce maintenance costs. By pressing and fixing the first bracket 210 and the second bracket 2120, the stability of the installation of the elastic member 230 and the driving member 220 can be improved.

[0235] The present application is not limited to a first bracket 210 and a second bracket 2120 that are snap-fitted together. It can also be an integrally formed bracket 200, with the end opening of the bracket 200 used to install the driver 220 and the circuit board 270, and the output shaft of the driver 220 extending from the other end opening of the bracket 200, and completing the installation of the elastic member at the other end of the bracket 200.

[0236] The use of an integrally formed bracket 200 is beneficial to improving the installation stability of the bracket 200, thereby ensuring the stability of the overall structure of the electric toothbrush.

[0237] In this embodiment, the elastic member 230 of the electric toothbrush of the present application has a hollow portion, and the output shaft 2210 of the driving member 220 abuts against the hollow portion. During the brushing process, when the user brushes with a force exceeding a certain level, the output shaft 2210 of the driving member 220 will be deformed, and then the output shaft 2210 will abut against the hollow portion of the elastic member 230 to undergo elastic deformation. The sensor 240 converts the elastic deformation of the hollow portion into an electrical signal, thereby realizing the detection of the user's brushing force.

[0238] In this embodiment, the hollow portion provides the elastic member 230 with better elastic deformation capability and greater deformation compatibility; the hollow portion facilitates elastic deformation of the elastic member 230, thereby improving the detection accuracy of the sensor 240.

[0239] The output shaft 2210 abuts against the hollow part of the elastic member 230. It should be understood that the output shaft 2210 can abut against a solid structure with a hollow part, or the output shaft 2210 can abut against a structure adjacent to the hollow part of the elastic member 230, both of which can improve the detection accuracy of the sensor 240.

[0240] It should be noted that when a user brushes with normal force, the vibrations generated by the output shaft 2210 to clean the teeth will not substantially interfere with the elastic member 230, nor will they deform the elastic member 230. Deformation of the elastic member 230 may occur when the user applies excessive force to the toothbrush while brushing, causing the brush head to press against the teeth. This reaction force is then transmitted through the brush head to the output shaft 2210, causing the output shaft 2210 to deform, further deforming the elastic member 230.

[0241] In an embodiment not shown, the elastic member 230 is a plate structure, and a plurality of holes are opened on the plate structure to form a hollow portion to enhance the elastic deformation ability of the elastic member 230 .

[0242] Specifically, the plate structure is a metal plate, which has good elastic deformation capabilities, ensuring that the elastic member 230 has good resilience and preventing the elastic member 230 from plastic deformation, which could lead to failure of the elastic member 230. Furthermore, by opening multiple holes in the metal plate, the resilience of the metal plate is further improved, thereby extending the service life of the elastic member 230.

[0243] The hollow portion is formed by setting a structure with multiple holes, and the structural setting of the multiple holes is conducive to improving the elastic deformation capacity.

[0244] As shown in Figures 13 to 20, the elastic member 230 includes a free portion 2320 and a fixed portion 2310. The fixed portion 2310 is fixed relative to the bracket 200. The first end of the free portion 2320 is connected to the fixed portion 2310, and the second end of the free portion 2320 is suspended. Part of the output shaft 2210 abuts against the free portion 2320. The sensor 240 is arranged on one side of the free portion 2320. When the output shaft 2210 abuts against the free portion 2320 and deforms, the sensor 240 detects the deformation to realize pressure detection; the suspended free portion 2320 is conducive to elastic deformation, which further helps to improve the accuracy of pressure detection of the electric toothbrush, and avoids the situation where the pressure detection is inaccurate or even fails due to the inability to correctly transmit the force when the user brushes his teeth with great force; and one end of the free portion 2320 is not bound, so it has a greater deformation ability, achieves greater deformation compatibility, and the overall pressure detection function of the electric toothbrush is better.

[0245] The hollow portion of the elastic member 230 may be provided on the free portion 2320 or on the fixed portion 2310 , or a hollow portion may be provided between the free portion 2320 and the fixed portion 2310 .

[0246] In this embodiment, the free portion 2320 is disposed on a side of the fixed portion 2310 closer to the brush head 260, so that the output shaft 2210 drives the free portion 2320 to deform before the fixed portion 2310. Because the free portion 2320 is suspended, it has a better rebound effect and deformation capability. The configuration of the free portion 2320 in this application improves the deformation compatibility of the elastic member 230 and avoids the phenomenon of the elastic member 230 being unable to rebound.

[0247] During the toothbrush brushing process, after the user applies an external force, the output shaft 2210 is subjected to a reaction force that presses against the free portion 2320 of the elastic member 230, causing the free portion 2320 to elastically deform. The sensor 240 converts the elastic deformation of the free portion 2320 into an electrical signal and transmits it to the controller for pressure detection. When the reaction force applied to the output shaft 2210 is too large, the output shaft 2210 drives the free portion 2320 to deform while simultaneously pressing against the fixed portion 2310. The fixed portion 2310 then presses against the output shaft 2210, limiting the pressure against the free portion 2320 to prevent the free portion 2320 from exceeding the maximum elastic deformation. At the same time, the fixed portion 2310 and the free portion 2320 jointly share the pressure of the output shaft 2210, further facilitating the rapid rebound of the elastic member 230. The structural arrangement of the free portion 2320 and the fixed portion 2310 realizes double deformation, which is beneficial to the protection of the elastic member 230 and avoids the problem that the free portion 2320 exceeds the maximum elastic deformation, resulting in insensitivity or failure due to inability to rebound.

[0248] In this embodiment, as shown in Figures 14 to 17 , the elastic member 230 has a hollow slit 2330, i.e., the hollow slit 2330 is a hollow portion. The elastic member 230 is divided into a free portion 2320 and a fixed portion 2310 by the hollow slit 2330. The hollow slit 2330 is used to form a suspended arrangement of the free portion 2320, and the hollow slit 2330 is used to facilitate elastic deformation of the free portion 2320. It should be understood that the hollow slit 2330 facilitates better elastic deformation of the free portion 2320. The output shaft 2210 abuts against the periphery of the hollow portion, which constitutes the output shaft 2210 abutting against the hollow portion protected by this application.

[0249] Specifically, the hollow gap ensures partial separation of the free part 2320 and the fixed part 2310, and the free part 2320 is less restricted, so that when force is applied to the free part 2320, it is easier to deform, and the sensor 240 can provide timely feedback to improve the accuracy of pressure detection of the electric toothbrush; and the free part 2320 and the fixed part 2310 are solid structures without holes and seams, which can enhance the service life of the free part 2320 and the fixed part 2310. On the whole, the elastic part 230 can achieve better pressure detection and has a longer service life.

[0250] In this embodiment, the specific structure of the free portion 2320 can be a straight structure, or a bent structure. It should be understood that the straight structure and the bent structure refer to the overall extension structure of the free portion 2320. The straight structure is formed as a straight extension structure, and the bent structure is formed as a structure with a bent extension. It should be noted that the bent structure can be a structure with multiple bends, and the bend can be formed between two linear extension structures or can be a circular arc bend.

[0251] As shown in Figures 14 to 17, in this embodiment, the fixing portion 2310 includes two end portions 2311 arranged at radial intervals along the output shaft 2210 and a connecting plate 2312 arranged between the two end portions 2311. The two end portions 2311 are fixed relative to the bracket 200. The connecting plate 2312 is used to connect the two end portions 2311. The two end portions 2311 are used to be fixedly connected to the bracket 200 to complete the fixation of the fixing portion 2310, so as to achieve stable installation of the elastic member 230.

[0252] Among them, the connecting plate 2312 is located between the two end portions 2311 and is used to support the output shaft 2210 during the brushing process. The connecting plate 2312 has a preset elastic deformation ability. Since the two ends of the connecting plate 2312 are fixed and one end of the free portion 2320 is suspended, the deformation ability of the connecting plate 2312 is smaller than the deformation ability of the free portion 2320. The two end portions 2311 are used to be fixedly connected to the bracket 200 to complete the fixed installation of the fixed portion 2310, so as to achieve the overall stable installation of the elastic member 230. The connecting plate 2312 is located between the two end portions 2311. When the user brushes his teeth too hard, the deformation of the output shaft 2210 increases, so that the output shaft 2210 will resist the free portion 2320 and continue to deform. After a certain degree, the output shaft 2210 further resists the connecting plate 2312. Then, under the action of such a large force, the fixed portion 2310 will relatively provide an opposite force to the output shaft 2210, so that the user feels resistance to remind the user that the brushing force is large at this time, and the fixed portion 2310 shares part of the force, which also prevents such a large force from causing the free portion 2320 to exceed the elastic deformation range, which is beneficial to protecting the elastic member 230.

[0253] In other embodiments, a portion of the output shaft 2210 may also directly abut the fixed portion 2310 and the free portion 2320 , so that the fixed portion 2310 can directly share the abutting force of the free portion 2320 , thereby extending the service life of the elastic member 230 .

[0254] In this embodiment, as shown in Figure 17, a notch 2313 is formed on the connecting plate 2312, and the first end of the free portion 2320 is connected to at least one of the two end portions 2311 and the connecting plate 2312, and the second end of the free portion 2320 is suspended inside the notch 2313. A hollow gap 2330 is formed between the part of the free portion 2320 arranged inside the notch and the inner wall surface of the notch, so that the free portion 2320 and the fixed portion 2310 are arranged more compactly, which is conducive to the small size design of the electric toothbrush; and the connecting plate 2312 accommodates the free portion 2320 by means of the notch 2313, which also makes the connecting plate 2312 have a more continuous structure at the non-opening part, which is conducive to improving the strength of the connecting plate 2312, and further helps to share the force of the output shaft for the free portion 2320.

[0255] The first end of the free part 2320 is the cantilever end 2323, which is used to connect the free part 2320 with the fixed part 2310 so that the free part 2320 and the fixed part 2310 form a whole. The second end of the free part 2320 is the protruding end 2321, which is formed inside the notch 2313. The protruding end 2321 is suspended and has better deformation ability. The sensor 240 is set on one side of the protruding end 2321 to detect the deformation of the protruding end 2321 and then convert it into an electrical signal and send it to the controller for pressure feedback.

[0256] In this embodiment, the structure of the extended end 2321 and the cantilever end 2323 can be, as shown in Figure 17, that the first end of the free portion 2320 is connected to the end 2311 of one of the fixed portions 2310, and the second end of the free portion 2320 extends toward the end 2311 of the other fixed portion 2310. The extended end 2321 extends in a direction parallel to the connecting plate 2312, and the output shaft 2210 abuts the extended end 2321. Since the location where the cantilever end 2323 is connected to the end 2311 does not abut the output shaft 2210, it is beneficial for the output shaft 2210 to drive the free portion 2320 to deform, thereby improving the measurement accuracy of the sensor 240.

[0257] The structural setting of the protruding end 2321 and the cantilever end 2323 can also be that the first end of the free part 2320 is connected to the connecting plate 2312, the second end of the free part 2320 extends along the axial direction of the output shaft 2210, and the protruding end 2321 is extended in a direction perpendicular to the connecting plate 2312.

[0258] The axial direction of the output shaft 2210 is the X direction shown in FIG. 12 , and the radial direction of the output shaft 2210 is the Y direction shown in FIG. 12 .

[0259] When the user is brushing his teeth, if the user applies too much force, the output shaft 2210 will first abut against the protruding end 2321 after being subjected to the force. After the user applies a greater force, the output shaft 2210 begins to abut against the connecting plate 2312, and the deformation capabilities of the protruding end 2321 and the connecting plate 2312 are reduced in turn, thereby achieving reverse abutment against the output shaft 2210, thereby avoiding the elastic deformation of the protruding end 2321 of the free portion 2320 exceeding the maximum elastic deformation, resulting in the phenomenon of being unable to rebound. The structural setting of the elastic part 230 of the present application increases the service life of the elastic part 230.

[0260] As shown in FIG. 18 to FIG. 20 , the electric toothbrush further includes a flexible member 250 . At least a portion of the flexible member 250 is disposed between the free portion 2320 and the output shaft 2210 . The output shaft 2210 drives the free portion 2320 to deform through the flexible member 250 .

[0261] Specifically, by setting the flexible part 250, the flexible part 250 is relatively soft. The flexible part 250 is set between the output shaft 2210 and the free part 2320, which can buffer the contact between the output shaft 2210 and the free part 2320, avoid direct hard contact between the output shaft 2210 and the free part 2320, and cause the vibration to be aggravated, and reduce the noise generated by the hard contact between the output shaft 2210 and the free part 2320; and because the flexible part 250 is relatively soft, the output shaft 2210 is avoided from hard contacting the free part 2320, and it also further prevents the free part 2320 from being subjected to too rapid or too large a force, which causes the free part 2320 to be unable to rebound to the initial state after deformation, thereby improving the service life of the elastic part 230 and further enhancing the stability of the electric toothbrush.

[0262] In order to improve the installation stability of the flexible member 250 , the free portion 2320 has a protruding structure 2322 extending toward one side of the flexible member 250 . The flexible member 250 has a limiting groove 2510 , and at least a portion of the protruding structure 2322 extends into the interior of the limiting groove 2510 .

[0263] The number of the protruding structure 2322 can be one or more. When there are multiple protruding structures 2322 , it is beneficial to further improve the stability of the connection between the free portion 2320 and the flexible member 250 .

[0264] The end surface of the protruding structure 2322 may be circular, elliptical, rectangular, polygonal or other irregular shapes.

[0265] It is understandable that the protruding structure 2322 and the limiting groove 2510 may also be provided interchangeably, that is, the protruding structure 2322 is provided on the flexible member 250 , and the limiting groove 2510 is provided on the free portion 2320 .

[0266] By providing the protruding structure 2322 and the limiting groove 2510 structure to achieve the limited installation of the flexible member 250 and the free portion 2320, the relative slip between the protruding structure 2322 and the limiting groove 2510 is avoided, which is conducive to improving the stability of the installation between the flexible member 250 and the free portion 2320. In addition, when the output shaft 2210 moves toward the free portion 2320, the output shaft 2210 first squeezes the flexible member 250, reducing the shaking of the flexible member 250 and reducing noise. At the same time, the protruding structure 2322 and the limiting groove 2510 can achieve installation positioning, further facilitating the installation of the flexible member 250 and the elastic member 230. In other embodiments, the flexible member 250 and the free portion 2320 can also be fixed by bonding or by fasteners to achieve the connection between the flexible member 250 and the free portion 2320; of course, the flexible member 250 and the output shaft 2210 can also be fixed by bonding or by fasteners.

[0267] In one specific implementation of this embodiment, the flexible member 250 is a soft rubber sleeve. The soft rubber sleeve is disposed on the outside of the output shaft 2210 and is fixedly connected to the output shaft 2210. The outer peripheral wall of the output shaft 2210 serves as the outer peripheral wall of the soft rubber sleeve, and the free portion 2320 abuts against the outer peripheral wall of the soft rubber sleeve.

[0268] By configuring the flexible member 250 as a soft rubber sleeve, the output shaft 2210 indirectly abuts the outer wall of the output shaft 2210 through the soft rubber sleeve, allowing the free portion 2320 to abut the soft rubber sleeve. This reduces wear on the output shaft 2210 and the free portion 2320 when the motor vibrates, ensuring the structural strength of the output shaft 2210 and the free portion 2320 and extending the service life of the electric toothbrush. Furthermore, the soft rubber sleeve is softer than the output shaft 2210, which reduces noise generated by contact or friction between the output shaft 2210 and the elastic member 230 when the motor vibrates, thereby improving the user experience.

[0269] In one specific implementation of this embodiment, a mounting portion that is cooperatively connected to the soft rubber sleeve is provided on the output shaft 2210. The soft rubber sleeve is cooperatively connected to the mounting portion.

[0270] By setting a mounting portion on the output shaft 2210, a mounting position is provided for the soft rubber sleeve, and the installation stability of the soft rubber sleeve is improved, thereby improving the stability of the electric toothbrush; at the same time, when the electric toothbrush is produced and assembled, the setting of the mounting portion can better enable the soft rubber sleeve to be installed, which is conducive to improving installation and production efficiency.

[0271] In one specific implementation of this embodiment, the mounting portion is a groove structure provided on the outside of the output shaft 2210. The soft rubber sleeve is located in the groove structure, and the soft rubber sleeve and the groove structure have an interference fit.

[0272] By configuring the mounting portion as a groove structure, the mounting portion structure can be simplified, thereby reducing the difficulty of manufacturing the output shaft 2210. Furthermore, by configuring the mounting portion as a groove structure, at least a portion of the soft rubber sleeve can be embedded within the output shaft 2210, thereby increasing the stability of the connection between the soft rubber sleeve and the output shaft 2210. The soft rubber sleeve engages within the groove structure in the axial direction of the output shaft 2210, thereby improving the stability of the connection between the soft rubber sleeve and the output shaft 2210. Providing an interference fit between the soft rubber sleeve and the groove structure prevents the soft rubber sleeve from rotating relative to the output shaft 2210, reducing the shaking of the soft rubber sleeve and reducing noise.

[0273] In one specific implementation of this embodiment, the flexible member 250 is a soft rubber member. The soft rubber member is attached to the free portion 2320, and the output shaft 2210 abuts against the free portion 2320 by abutting against the soft rubber member. The hardness of the soft rubber member is less than that of the elastic member 230.

[0274] By configuring the flexible member 250 as a soft rubber member, the design flexibility of the electric toothbrush can be increased. By attaching the soft rubber member to the free portion 2320, the output shaft 2210 abuts against the free portion 2320 through the soft rubber member, thereby reducing wear on the free portion 2320 caused by the output shaft 2210. By configuring the hardness of the soft rubber member to be lower than that of the elastic member 230, the noise generated by contact between the motor vibration and the elastic member 230 can be reduced, thereby improving the user experience.

[0275] In one specific implementation of this embodiment, the soft rubber member is a gasket, which is arranged between the free portion 2320 and the output shaft 2210 , and the output shaft 2210 abuts against the free portion 2320 via the abutting gasket.

[0276] By configuring the soft rubber part as a gasket with a sheet structure, the structure of the soft rubber part can be simplified, the difficulty of processing the soft rubber part can be reduced, and the cost can be reduced.

[0277] In one specific implementation of this embodiment, the surface of the flexible member 250 is provided with textures to reduce the surface friction coefficient of the flexible member 250 .

[0278] The surface of the flexible part 250 is textured, which helps to reduce the surface friction coefficient of the flexible part 250. Therefore, when the output shaft 2210 contacts the flexible part 250, or the flexible part 250 contacts the elastic part 230, the smaller friction coefficient is more conducive to the relative rotation of the output shaft 2210 and the flexible part 250, or the flexible part 250 and the free part 2320, which further helps to reduce the noise of the electric toothbrush.

[0279] In one specific implementation of this embodiment, the flexible member 250 is thermoplastic polyurethane rubber.

[0280] The flexible part 250 of thermoplastic polyurethane rubber is TPU flexible part 250. This type of flexible part 250 has a relatively small friction coefficient, which is also beneficial to reducing the noise between the output shaft 2210 and the flexible part 250, or the flexible part 250 and the free part 2320, thereby improving the user experience.

[0281] As shown in Figures 19 to 21, the bracket 200 also has a limiting portion 211. In order to prevent the elastic member 230 from being damaged due to excessive force when the user is brushing his teeth, thereby affecting the normal use of the electric toothbrush, a limiting portion 211 is formed on the bracket 200. The limiting portion 211 abuts against the output shaft 2210 to limit the elastic deformation caused by the output shaft 2210 abutting against the elastic member 230.

[0282] Specifically, the limiting portion 211 is provided to abut against the output shaft 2210 to limit the output shaft 2210 , thereby preventing the output shaft 2210 from abutting against the elastic member 230 , causing the elastic member 230 to exceed its elastic limit and be unable to rebound.

[0283] In this embodiment, the structure of the limiting portion 211 can be a convex plate structure provided on the bracket 200 . There can be only one convex plate structure, or multiple convex plate structures can be used to cooperate to support the limiting output shaft 2210 .

[0284] When the convex plate structure is provided, the convex plate structure forms a supporting surface. The supporting surface can be a plane or an arc surface extending along the circumference of the output shaft 2210 .

[0285] When multiple convex plate structures are provided, each convex plate structure forms a supporting surface. The multiple supporting surfaces may be coplanar or may be formed into an arcuate surface extending along the circumference of the output shaft 2210 .

[0286] In this embodiment, the output shaft 2210 is limited by setting a limiting portion 211, thereby ensuring the amplitude of the output shaft 2210 against the elastic member 230. The amplitude of the output shaft 2210 is amplitude B as shown in Figure 19, which means that the elastic deformation of the elastic member 230 is limited, thereby ensuring that the elastic member 230 can deform and rebound normally, which is conducive to repeated use, increases the service life of the elastic member 230, and facilitates pressure detection of the sensor 240.

[0287] The vertical distance between the limiting portion 211 and the output shaft 2210 is less than or equal to the maximum elastic deformation of the elastic member 230 , so as to ensure that the setting of the limiting portion 211 has the effect of enabling the elastic member 230 to work normally.

[0288] Specifically, by adopting a vertical distance value between the limiting portion 211 and the output shaft 2210 that is less than or equal to the maximum elastic deformation value of the elastic member 230, it is ensured that the elastic member 230 will not exceed the maximum elastic deformation of the elastic member 230, thereby ensuring the normal operation of the elastic member 230, avoiding the phenomenon of being unable to rebound, and improving the service life of the elastic member 230.

[0289] In this embodiment, the thickness of the flexible part 250 is less than or equal to the vertical distance between the limiting portion 211 and the output shaft 2210, so that when the output shaft 2210 drives the brush head 260 to vibrate, the output shaft 2210 drives the elastic part 230 to undergo elastic deformation through the flexible part 250, and then performs pressure detection through the sensor 240.

[0290] Specifically, in the present application, by adopting a thickness value of the flexible part 250 that is less than or equal to the vertical distance value between the limiting part 211 and the output shaft 2210, it is ensured that the limiting part can achieve swing limiting of the output shaft 2210. At the same time, it also avoids the flexible part being too thick, squeezing the elastic part 230 beyond the maximum elastic deformation, resulting in the elastic part 230 being unable to rebound normally, thereby improving the service life of the elastic part 230.

[0291] When a user applies excessive force while brushing their teeth, the output shaft 2210 is acted upon by the reverse force, driving the elastic member 230 to undergo elastic deformation. When the elastic member 230 is elastically deformed by the output shaft 2210 and approaches the maximum elastic deformation of the elastic member 230, the output shaft 2210 abuts against the limiter 211, thereby limiting the output shaft 2210 from further squeezing the elastic member 230. The limiter 211 limits the movement of the output shaft 2210, thereby preventing the elastic member 230 from exceeding its elastic deformation and becoming unable to rebound.

[0292] In this embodiment, the position limiting portion 211 is provided with a rotation limiting portion along the circumferential direction of the output shaft 2210, and the rotation limiting portion is used to limit the rotation angle of the output shaft 2210. Specifically, the rotation limiting portion is provided to limit the rotation angle of the output shaft 2210, thereby ensuring that the output shaft 2210 rotates within a preset rotation angle range, thereby improving the controllability of the output shaft 2210.

[0293] In this embodiment, the rotation limiting portion can be a groove structure extending along the circumference of the output shaft 2210, and the output shaft 2210 rotates inside the groove structure. The present application limits the rotation angle of the output shaft 2210 by limiting the circumferential extension angle of the groove structure.

[0294] In this embodiment, the limiting portion 211 is provided with a notch portion. When the output shaft 2210 is subjected to force and approaches the limiting portion 211, the output shaft 2210 can extend into the notch portion, and the wall of the notch portion covers a portion of the output shaft 2210. The wall of the notch portion can limit the radial movement of the output shaft 2210.

[0295] The radial movement of the output shaft 2210 is limited by the structure of the notch portion, further avoiding the phenomenon that the elastic member 230 is supported by the output shaft 2210 and exceeds the maximum elastic deformation of the elastic member 230, resulting in the inability to rebound, thereby improving the service life of the elastic member 230. At the same time, the rotation angle of the output shaft 2210 is limited by the notch portion, and the single structure of the limiting portion 211 can realize both the limitation of deformation and the limitation of the rotation angle, which is conducive to the design of an electric toothbrush with a relatively small volume and optimized design.

[0296] Specifically, the structure of the notch portion is configured to support and limit the output shaft 2210, thereby limiting the radial movement of the output shaft 2210, and further preventing the elastic member 230 from being supported by the output shaft 2210 beyond its elastic limit and unable to rebound.

[0297] In this embodiment, the notch portion is formed as a groove structure, and the bottom surface of the groove structure is used to support the output shaft 2210 to achieve positioning. The bottom surface of the groove can be a plane or an arc surface, which can limit the radial movement of the output shaft 2210.

[0298] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0299] The elastic part 230 of the electric toothbrush of the present application has a hollow part, and the output shaft 2210 of the driving part 220 abuts against the hollow part. The vibration of the output shaft 2210 of the driving part 220 will drive the hollow part to undergo elastic deformation, and the sensor 240 converts the elastic deformation of the hollow part into an electrical signal. The setting of the hollow part makes the elastic part 230 more elastic, and the setting of the hollow part makes the elastic part 230 have a greater degree of deformation and greater deformation compatibility; at the same time, the setting of the hollow part facilitates elastic deformation, thereby improving the detection accuracy of the sensor 240.

[0300] The electric toothbrush of the present application employs a sensor 240 disposed on one side of the elastic member 230, conveniently converting the elastic deformation of the elastic member 230 into an electrical signal. Compared to related art techniques that directly connect the sensor 240 (e.g., a pressure sensor) to the output shaft 2210, the present invention prevents the connection cable 280 of the sensor 240 from breaking due to the rotation of the output shaft 2210 when the electric toothbrush is not in use, thereby ensuring normal operation of the electric toothbrush.

[0301] Obviously, the embodiments described above are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, those skilled in the art may make other different forms of changes or modifications without making any creative work, and all of these should fall within the scope of protection of the present invention.

[0302] The internal bracket of an electric toothbrush is used to fix the internal structure. Existing internal brackets are poorly designed, causing the electric toothbrush to vibrate and make a lot of noise, resulting in a poor user experience. This application addresses the technical issues of unreasonable internal bracket design, vibration, and noise in electric toothbrushes, and provides an internal bracket and an electric toothbrush. Figures 22 to 33 correspond to the description of this solution.

[0303] See Figures 22-33. As an oral cleaning tool, electric toothbrush 3200 uses motor 3220 to drive the brush head to vibrate at high frequencies, promoting blood circulation in the mouth, improving oral cleaning effectiveness, and also massaging gum tissue. Furthermore, the high-frequency vibration of the brush head breaks down toothpaste into fine foam. This fine foam can penetrate deep between teeth, effectively improving oral cleaning.

[0304] 22 and 24 , the electric toothbrush 3200 includes a handle housing 3210, an internal bracket 300, a motor 3220, a battery 3230, and a circuit board 3240. The internal bracket 300 is disposed within the handle housing 3210, and the motor 3220, battery 3230, and circuit board 3240 are all disposed within the internal bracket 300. The handle housing 3210 is used for the user to hold, thereby facilitating the user's brushing operation; the internal bracket 300 is used to secure the internal structure; the motor 3220 is used to output power to the electric toothbrush 3200; the battery 3230 is used to provide a power source; and the circuit board 3240 is used to connect the motor 3220, battery 3230, and other circuits, as well as to control related circuits.

[0305] The handle housing 3210 can be a plastic handle housing 3210 or a metal handle housing 3210. The shape of the handle housing 3210 can be a roughly elongated column, and the cross-section of the handle housing 3210 can be roughly circular, roughly rectangular, or roughly triangular, etc.; roughly circular means a circle-like shape such as an ellipse or a racetrack circle; roughly rectangular means a rectangle with arc-shaped sides and smooth transitions between the sides; roughly triangular means a triangle with arc-shaped sides and smooth transitions between the sides. It should be noted that the cross-section of the handle housing 3210 can be regarded as the shape formed by a horizontal plane crossing the handle housing 3210 and the wall of the handle housing 3210 when the brush head of the electric toothbrush 3200 is placed vertically upward.

[0306] In one embodiment, the cross-section of the handle housing 3210 is roughly triangular, which gives the electric toothbrush 3200 a relatively novel visual effect and enhances the product's market competitiveness. The roughly triangular edges facilitate applying force to the handle housing 3210, making it easier for the user to grip and less likely to slip. This allows the user to more conveniently adjust the posture of the electric toothbrush 3200, facilitating user use. Furthermore, it is easier to set buttons or displays on the triangular edges without excessive consideration of radians and curved surfaces, reducing processing difficulty and cost. In another embodiment, the cross-section of the handle housing 3210 is roughly rectangular, allowing the internal structure of the electric toothbrush 3200 to be more conveniently arranged within the handle housing 3210. Compared to a standard circular cross-section, this reduces the processing precision requirements for the internal structure, allowing for a higher tolerance for processing errors in the interior and outer shell, facilitating assembly and production of the electric toothbrush 3200. In another embodiment, the cross-section of the handle housing 3210 is generally circular, which allows the housing to better match the shape of the conventional motor 3220, making more efficient and reasonable use of the internal space of the housing and reducing the size of the entire device. Depending on different working conditions, the handle housing 3210 can adopt different cross-sections as long as they meet the corresponding working conditions.

[0307] 23 and 24 , the internal bracket 300 fixes the motor 3220 and the battery 3230. Since the motor 3220 and the battery 3230 are the larger and more important parts inside the electric toothbrush 3200, the internal bracket 300 fixes the motor 3220 and the battery 3230 at the same time, which can enhance the integrity of the internal structure of the electric toothbrush 3200, so that when the electric toothbrush 3200 is working, the structures such as the motor 3220 and the battery 3230 are more coordinated, thereby reducing the vibration and noise generated by the internal structure of the electric toothbrush 3200 when it is working, which is conducive to improving the user's comfort.

[0308] In this embodiment, the motor 3220 and the battery 3230 are both directly connected to or in direct contact with the internal bracket 300, which can greatly reduce the complexity of the internal structure and is conducive to optimizing the internal design of the electric toothbrush 3200, thereby reducing the volume of the electric toothbrush 3200, and further facilitating the miniaturization of the electric toothbrush 3200; it can be understood that in other embodiments, the motor 3220 and the battery 3230 can also be connected to the internal bracket 300 through other components, that is, it can be an indirect connection, as long as it can meet the above-mentioned enhancement of the integrity of the electric toothbrush 3200.

[0309] The internal bracket 300 includes a motor fixing portion 310 and a battery fixing portion 320. The motor fixing portion 310 and the battery fixing portion 320 are interconnected. The motor fixing portion 310 is used to fix the motor 3220, and the battery fixing portion 320 is used to fix the battery 3230. In this embodiment, at least a portion of the motor fixing portion 310 and at least a portion of the battery fixing portion 320 are integrally formed. This allows the motor fixing portion 310 and the battery fixing portion 320 to have good connection stability, further helping to enhance the integrity of the internal bracket 300, helping to reduce vibration and noise of the electric toothbrush 3200, and reducing assembly steps. It is understood that in other embodiments, the motor fixing portion 310 and the battery fixing portion 320 can also be a separate structure, that is, the motor fixing portion 310 and the battery fixing portion 320 are directly fixed or indirectly fixed through other components. The fixing method can be screw connection, clamping connection, etc., so as to meet the design requirements under the corresponding working conditions, as long as the integrity of the internal bracket 300 can be enhanced.

[0310] 25 to 31 , the internal bracket 300 includes a first bracket 330 and a second bracket 340, which are relatively fastened to each other to form the internal bracket 300. After fastening, the motor 3220 and the battery 3230 are thereby housed. It should be noted that relative fastening means that the first bracket 330 and the second bracket 340 can be fastened together using a direct connection scheme, or they can be fastened together using other structures as intermediate connectors. In other embodiments, the first bracket 330 and the second bracket 340 are connected by other means, such as gluing, screwing, winding and binding, etc., depending on the structure and assembly requirements.

[0311] In other embodiments, a seal may be provided at the connection between the first bracket 330 and the second bracket 340. The seal may be squeezed and deformed to achieve sealing, waterproofing, shock absorption and noise reduction effects. Specifically, the seal may be a rubber part or a plastic part, and after the first bracket 330 and the second bracket 340 are assembled, at least partially protrude from one side of the inner wall or outer wall of the bracket. The seal may also be glue, which may partially overflow at the connection after assembly and drying. The seal may be a cylindrical or approximately cylindrical or approximately square sealing ring, and the corresponding side wall of the connection has a groove body, and the circular sealing ring is located in the groove body.

[0312] 27 and 28 , the first bracket 330 includes a portion of the motor fixing portion 310 and a portion of the battery fixing portion 320 in the axial length of the electric toothbrush 3200, and the second bracket 340 includes at least another portion of the motor fixing portion 310 and another portion of the battery fixing portion 320 in the axial length of the electric toothbrush 3200, so that the first bracket 330 and the second bracket 340 are snapped together to form an internal bracket 300. In other embodiments, one of the first bracket 330 or the second bracket 340 can be split, that is, the motor fixing portion 310 and the battery fixing portion 320 are not integrally formed, but the motor 3220 or the battery fixing portion 320 needs to be fixed to the integral bracket before the remaining parts are installed. The fixing connection order can be changed as long as the installation is convenient. In this embodiment, as long as one of the first bracket 330 and the second bracket 340 is integrally formed, the connection stability of the overall internal bracket 300 can be met, but the other bracket is split, which can make the internal structure and wire routing operation space larger, and facilitate the adjustment of the internal mechanism position and neat routing. Motor fixing portion 310 battery fixing portion 320

[0313] The first bracket 330 and the second bracket 340 snap together the motor 3220 and the battery 3230, so that the first bracket 330, the second bracket 340, the motor 3220 and the battery 3230 have good integrity, which is beneficial to the shock absorption and noise reduction of the electric toothbrush 3200; and with such a structure, when the electric toothbrush 3200 is assembled, the internal structures such as the motor 3220 and the battery 3230 can be assembled, and the structures with good integrity can be further stuffed into the handle shell 3210 together, which is convenient for the assembly of various components and the overall assembly of the electric toothbrush 3200, which is beneficial to improving production efficiency. At the same time, such a snap-fit ​​structure also avoids the reduction of the yield rate due to misoperation during assembly, which is further beneficial to improving the yield rate.

[0314] In this embodiment, the first bracket 330 and the second bracket 340 are fixed by snapping, so that the first bracket 330 and the second bracket 340 can be fastened together to fix the motor 3220 and the battery 3230, which is convenient for the quick assembly of the electric toothbrush 3200; in particular, since the motor 3220 is generally cylindrical, in order to ensure the support of the motor 3220, the internal bracket 300 is generally cylindrical or cube-like. In order to minimize the size of the toothbrush and the space utilization of the internal stacking, when the cross-section of the columnar handle shell 3210 is triangular, due to the triangular shape, the wall of the handle shell 3210 extending in the axial direction will resist the first bracket 330 and the second bracket 340, thereby forming a similar The three walls corresponding to the triangle jointly support the overall internal bracket 300 and the motor 3220 and battery 3230 fixed by the internal bracket 300 from three directions, further improving the overall stability and integrity of the electric toothbrush 3200, and helping to reduce the vibration and noise of the electric toothbrush 3200, which not only facilitates the assembly of the inner shell bracket, but also ensures good strength after assembly. The synergistic effect of the two forms a better design; it can be understood that in other embodiments, the first bracket 330 and the second bracket 340 can also be screwed and fixed, for example, by threaded fasteners such as bolts and screws, so as to ensure good connection strength and stable fixation, and the cross-section of the handle shell 3210 is rectangular.

[0315] In other embodiments, the first bracket 330 is screwed to the motor 3220, and the second bracket 340 is screwed to the motor 3220, so that both the first bracket 330 and the second bracket 340 are fixed relative to the motor 3220. This achieves that the first bracket 330 and the second bracket 340 are not directly connected, but are relatively fastened, which can also achieve the above-mentioned purpose of enhancing stability and integrity. Of course, according to different working conditions, the fixing method of the first bracket 330 and the second bracket 340 can be selected, and the shape of the handle housing 3210 can also be selected accordingly, as long as the corresponding working conditions can be achieved.

[0316] The first bracket 330 is provided with a clamping portion 331, which is formed by extending the wall of the first bracket 330 toward the second bracket 340. The clamping portion 331 is provided with a clamping hole, and the second bracket 340 is provided with a clamping block 341. Therefore, during installation, the first bracket 330 and the second bracket 340 only need to be snapped together and pushed together. The clamping portion 331 is then engaged with the clamping block 341, and the clamping block 341 extends into the clamping hole, thereby securing the first bracket 330 to the second bracket 340. In other embodiments, the clamping portion 331 can also be an L-shaped slot with a protrusion 3381, and the clamping block 341 is also provided with a corresponding protrusion 3381 slot, which can hook back into the clamping portion 331 to achieve a stable clamping effect.

[0317] 25 , there are multiple clamping portions 331 and multiple clamping blocks 341, which correspond to each other and are clamped one by one. In this embodiment, there are eight clamping portions 331 and eight clamping blocks 341. Four clamping portions 331 are provided on each of two corresponding walls along the axial length of the first bracket 330. Meanwhile, four clamping blocks 341 are provided on each of two corresponding walls along the axial length of the second bracket 340. Thus, four clamping portions 331 are clamped to four clamping blocks 341 on both sides of the first bracket 330 and the second bracket 340, respectively, to achieve a secure fixation. It is understood that in other embodiments, the number of clamping portions 331 and eight clamping blocks 341 may also be other values. The four clamping parts 331 are each provided with two located at the battery fixing part 320 and the motor fixing part 310, and are not evenly spaced along the axial length, but are arranged closer to the upper end of the battery fixing part 320 and the upper end of the motor fixing part 310. This is because after the motor 3220, the battery 3230 and the internal bracket 300 are assembled, more vibrations are in the upper half of the handle of the electric toothbrush 3200, which requires a more stable connection and fixation and better mechanical strength. In addition, the upper half of the internal bracket 300 is provided with more heat dissipation holes. Refer to the description of the heat dissipation holes below, which results in lower mechanical strength of the bracket in the upper part. It is necessary to set the clamping part 331 further upward to compensate for the reduction in mechanical strength caused by the hollowing out of the bracket wall. It can be understood that in other embodiments, the number of clamping parts 331 and clamping blocks 341 can also be other values.

[0318] In the area corresponding to the motor fixing portion 310, two clamping portions 331 are correspondingly provided on each wall of the first bracket 330, and two clamping blocks 341 are correspondingly provided on each wall of the second bracket 340. Thus, in the area of ​​the motor fixing portion 310, two clamping portions 331 on each side of the wall correspond to two clamping blocks 341 for clamping, and a total of four clamping portions 331 are clamped to the clamping blocks 341; similarly, in the area corresponding to the battery fixing portion 320, two clamping portions 331 are correspondingly provided on each wall of the first bracket 330, and two clamping blocks 341 are correspondingly provided on each wall of the second bracket 340. Thus, in the area of ​​the battery fixing portion 320, two clamping portions on each side of the wall correspond to the two clamping portions 331. 331 corresponds to two clamping blocks 341, and a total of four clamping parts 331 are clamped to the clamping blocks 341, so that the snapping force between the first bracket 330 and the second bracket 340 in the axial direction is basically evenly distributed. To ensure the reliability of the connection, the length of the clamping part 331 is at least 5% of the wall length, that is, the snapping force between the first bracket 330 and the second bracket 340 on the motor 3220 and the battery 3230 is basically uniform, preventing stress concentration in the internal structure, further helping to improve reliability, and also allowing the internal bracket 300 to better fix the motor 3220 and the motor 3220 at all locations in the axial direction.

[0319] In this embodiment, when the electric toothbrush 3200 is placed normally with the brush head facing upward, the clamping portions 331 of the two walls of the first bracket 330 are basically horizontally aligned in the horizontal direction; similarly, the clamping blocks 341 of the two walls of the second bracket 340 are basically horizontally aligned in the horizontal direction, and further, the fixing forces on both sides of the internal bracket 300 are basically the same, which is also beneficial to prevent stress concentration and further helps to improve reliability; it can be understood that in other embodiments, according to different working conditions, the clamping portions 331 and the clamping blocks 341 can also be arranged in other ways.

[0320] The first bracket 330 is also provided with a notch portion 332, and the second bracket 340 is provided with a first limiting portion 342. When the first bracket 330 and the second bracket 340 are buckled and fixed, the first limiting portion 342 is located in the notch portion 332, thereby guiding the installation and preventing the first bracket 330 and the second bracket 340 from being misaligned, ensuring that the first bracket 330 and the second bracket 340 can be accurately limited when fixed, which is beneficial to improving the connection stability of the first bracket 330 and the second bracket 340, and the first limiting portion 342 and the notch portion 332 can also facilitate installation, that is, the first limiting portion 342 and the notch portion 332 are installed correspondingly, so that the first bracket 330 and the second bracket 340 can be snapped and fixed, and a single component has a dual effect, which optimizes the structural design of the electric toothbrush 3200.

[0321] In this embodiment, the first limiting portion 342 is roughly shaped like a prism, and the notch portion 332 is also roughly shaped like a prism, so that when the first limiting portion 342 extends into the notch portion 332, the corners of the prism can play a better limiting role, and the first bracket 330 and the second bracket 340 will basically not be misaligned during installation; it can be understood that in other embodiments, according to different working conditions, the first limiting portion 342 and the notch portion 332 can also be other shapes.

[0322] The internal bracket 300 further includes a top wall 333 and a bottom wall 334. The top wall 333 is used to support the motor 3220, and the bottom wall 334 is used to support the battery 3230. The top wall 333 and the bottom wall 334 are simultaneously provided on the first bracket 330 or the second bracket 340. Thus, when the motor 3220 and the battery 3230 are installed, the motor 3220 and the battery 3230 can be fixed together on the same first bracket 330 or the second bracket 340, thereby providing stability for the fixation of the motor 3220 and the battery 3230. This also improves the integrity of the internal bracket 300, the motor 3220, and the battery 3230, facilitates the fixation of the internal structure of the electric toothbrush 3200, and also helps reduce vibration and noise of the electric toothbrush 3200 and facilitates the assembly operation of the electric toothbrush 3200.

[0323] In this embodiment, the top wall 333 and the bottom wall 334 are both arranged on the first bracket 330, and the bottom wall 334 is provided with a stabilizing hole 335. The second bracket 340 is provided with a stabilizing portion 343 at one end close to the bottom wall 334. The stabilizing portion 343 extends into the stabilizing hole 335 and is snapped into the wall of the stabilizing hole 335 to form the stabilizing hole 335, so that the stabilizing portion 343 and the stabilizing hole 335 further strengthen the fixation of the first bracket 330 and the second bracket 340; it can be understood that in other embodiments, according to different working conditions, the positions of the stabilizing hole 335 and the stabilizing portion 343 can also be interchanged.

[0324] Referring to Figure 32 , the circuit board 3240 also includes a tail cap assembly, which is used to enable the charging function of the electric toothbrush 3200. The tail cap assembly is threadedly secured to the side of the bottom wall 334 facing away from the battery 3230. Specifically, a threaded portion 3341 is provided on the side of the bottom wall 334 facing away from the battery 3230. A threaded fastener screws the tail cap assembly to the threaded portion 3341, thereby securing the tail cap assembly relative to the internal bracket 300. This further optimizes the design of the electric toothbrush 3200 and reduces its size.

[0325] The length of the second bracket 340 along the axial direction is relatively smaller than the length of the first bracket 330 along the axial direction, and when the first bracket 330 and the second bracket 340 are clamped and fixed to each other, the two ends of the second bracket 340 along the axial direction respectively abut against the top wall 333 and the bottom wall 334, which enables the first bracket 330 to limit the second bracket 340 through the top wall 333 and the bottom wall 334, further facilitating the stable connection between the first bracket 330 and the second bracket 340.

[0326] A first heat dissipation hole 336 is formed on the first bracket 330 or the second bracket 340. The first heat dissipation hole 336 is used to dissipate heat from the motor 3220. In this embodiment, the first heat dissipation hole 336 corresponds to the area of ​​the motor fixing portion 310, thereby facilitating heat dissipation from the motor 3220. The first heat dissipation hole 336 is generally strip-shaped. Since the motor 3220 continuously generates heat in the axial direction, the strip-shaped first heat dissipation hole 336 can dissipate heat relatively evenly along the axial length of the motor 3220 while minimizing the impact on the mechanical strength of the bracket in the circumferential direction. This facilitates the long-term use of the motor 3220 and increases the service life of the electric toothbrush 3200. It is understood that in other embodiments, depending on different operating conditions, the first heat dissipation hole 336 can also be porous, achieving uniform heat dissipation over a larger area while reducing the vibration noise of the motor 3220.

[0327] Second heat dissipation holes 344 are defined in the first bracket 330 or the second bracket 340 to dissipate heat throughout the internal bracket 300 structure. Multiple second heat dissipation holes 344 are spaced apart along the axial length of the first or second bracket 340. Because the motor 3220 and battery 3230 are secured by the first bracket 330 and the second bracket 340, the multiple second heat dissipation holes 344 dissipate heat from the motor 3220 and battery 3230, further extending the service life of the motor 3220 and battery 3230 and facilitating the safe and long-term use of the electric toothbrush 3200.

[0328] In this embodiment, the first bracket 330 is provided with a first heat dissipation hole 336, and the second bracket 340 is provided with a second heat dissipation hole 344. The plurality of second heat dissipation holes 344 are spaced apart along the length direction of the second bracket 340, so that the second bracket 340 is roughly hollowed out, which increases the ability of the second bracket 340 to tolerate deformation, so that when the second bracket 340 is buckled with the first bracket 330 to fix the motor 3220 and the battery 3230, the better deformation ability facilitates the installation operation, and especially when the cross section of the handle shell 3210 is triangular, due to the handle outer shell The shell 3210 supports the inner shell bracket, and the second bracket 340 has better deformation ability, which can make the second bracket 340 better receive the support force of the handle outer shell 3210, and the second bracket 340 is more firmly fastened to the first bracket 330, which is further beneficial to improve the overall stability of the internal bracket 300, the motor 3220 and the battery 3230, and is beneficial to reduce the vibration and noise of the electric toothbrush 3200; it can be understood that in other embodiments, the first heat dissipation hole 336 and the second heat dissipation hole 344 can also be set in other ways on the first bracket 330 or the second bracket 340.

[0329] In this embodiment, the second heat dissipation holes 344 are runway circular holes, the long diameter of the runway circle extends along the circumference of the internal bracket 300. The runway circular second heat dissipation holes 344 are convenient for heat dissipation and make the second bracket 340 have a better hollow structure, that is, the second bracket 340 has better deformation ability and more uniform mechanical strength; and corresponding to the area of ​​the motor fixing part 310, there are five runway circular second heat dissipation holes 344, and corresponding to the area of ​​the battery fixing part 320, there are also five runway circular second heat dissipation holes 344; it can be understood that in other embodiments, the second heat dissipation holes 344 may also be other shapes, or other numbers.

[0330] The electric toothbrush 3200 also includes a circuit board 3240, which is mounted on the first bracket 330. The first bracket 330 is provided with a cable hole 337, located at one end of the motor mounting portion 310 relatively close to the battery mounting portion 320. This allows the cable of the motor 3220 to extend through the cable hole 337 and connect to the circuit board 3240, further enabling the electric toothbrush 3200 to electrically control the motor 3220. The cable hole 337 facilitates circuit connection of the motor 3220, thereby optimizing the internal structural design of the electric toothbrush 3200 and resulting in a relatively compact electric toothbrush 3200.

[0331] 33 , the side of the circuit board 3240 facing away from the first bracket 330 is provided with electrical components and an electrical connection portion 3241. The circuit board 3240 is provided with a wire hole 3242, which is arranged adjacent to the wire routing hole 337. This allows the cable of the motor 3220 to extend from the wire routing hole 337 of the first bracket 330, pass through the wire hole 3242 of the circuit board 3240, and then into the component-receiving side of the circuit board 3240, where it is electrically connected to the electrical connection portion 3241 on the circuit board 3240. This reduces the structural complexity of the motor 3220 wiring, facilitates a compact electric toothbrush 3200, and further enhances the product's competitiveness. Of course, the adjacent arrangement here can mean that the wire routing hole 337 completely covers the wire routing hole 3242 in the circumferential direction, or that the wire routing hole 337 and the wire routing hole 3242 partially overlap, or that the wire routing hole 337 and the wire routing hole 3242 are spaced apart in the axial direction and do not overlap.

[0332] The two opposite walls of the first bracket 330 are provided with reinforcement parts 338, which extend along the axial direction of the first bracket 330 and are arranged in a strip shape. Each reinforcement part 338 is provided with a protrusion 3381, and the protrusion 3381 presses against the inner side of the handle shell 3210, so that the handle shell 3210 can easily apply force to the internal bracket 300, which is further beneficial to the shock absorption and noise reduction of the electric toothbrush 3200 and improves the user's comfort.

[0333] In this embodiment, the protrusion 3381 is made of a hard material, that is, the protrusion 3381 rigidly presses against the inner shell of the handle and basically does not deform, so that the internal bracket 300 and the handle outer shell 3210 have better integrity, which is conducive to shock absorption and noise reduction; it can be understood that in other embodiments, according to different working conditions, the protrusion 3381 can also be made of a soft material, that is, the protrusion 3381 elastically presses against the inner shell of the handle, as long as it can meet the shock absorption and noise reduction requirements of the corresponding working conditions.

[0334] The outer wall of the first bracket 330 is further provided with a retaining portion 3301, which is used to secure the circuit board 3240, thereby enriching the functionality of the internal bracket 300, optimizing the design, and reducing the size of the electric toothbrush 3200. Multiple retaining portions 3301 may be provided, and may be provided in both the area corresponding to the motor retaining portion 310 and the area corresponding to the battery retaining portion 320, or only in the area corresponding to the motor retaining portion 310 or the area corresponding to the battery retaining portion 320.

[0335] In this embodiment, a clamping portion 3301 is provided in the area corresponding to the battery fixing portion 320, and the number of the clamping portions 3301 in the area of ​​the battery fixing portion 320 is four, and the four clamping portions 3301 are basically rectangular, so that the circuit board 3240 can be better fixed and supported in both the length and width directions, which is conducive to the circuit board 3240 being firmly set on the internal bracket 300; and a plurality of auxiliary holes 3305 are provided in the area corresponding to the battery fixing portion 320, and the positions of the auxiliary holes 3305 correspond one-to-one to the positions of the clamping portions 3301, that is, the corresponding auxiliary holes 3305 and the clamping portions 3301 are basically at the same horizontal position, and the auxiliary holes 3305 allow components to be inserted during assembly, thereby facilitating the disassembly and assembly of the circuit board 3240; it can be understood that in other embodiments, a clamping portion 3301 may also be provided in the area of ​​the motor fixing portion 310, and of course, the number of the clamping portions 3301 and the auxiliary holes 3305 may also be other values.

[0336] A second limiting portion 3302 is provided in the motor fixing portion 310 area, and the number of the second limiting portions 3302 is at least two, and at least some of the second limiting portions 3302 are spaced apart in the circumferential direction of the first bracket 330. Therefore, when installing the circuit board 3240, it is only necessary to place the circuit board 3240 between the second limiting portions 3302 in the circumferential direction. The circuit board 3240 is pressed in this area, and the clamping portion 3301 will automatically clamp the circuit board 3240. The second limiting portion 3302 not only plays a role in guiding the installation, but also can cooperate with the clamping portion 3301 to facilitate the installation operation, thereby improving the assembly efficiency and protecting the circuit board 3240.

[0337] The length of the second limiting portion 3302 along the axial direction of the first bracket 330 is greater than that of the clamping portion 3301, so that the relatively long second limiting portion 3302 can limit the deflection of the circuit board 3240, and the second limiting portion 3302 will be continuously limited in the length direction of the circuit board 3240, which is conducive to the precise installation of the circuit board 3240; and the relatively short clamping portion 3301 is conducive to better deformation, so that the circuit board 3240 can be more easily clamped by the clamping portion 3301, which is further conducive to the protection of the circuit board 3240.

[0338] In this embodiment, the first bracket 330 is provided with two top connecting portions 3303 at both ends of the axial direction. The two top connecting portions 3303 limit the two ends of the circuit board 3240 in the axial direction, thereby cooperating with the second limiting portion 3302 to realize the axial and circumferential positioning of the circuit board 3240, further facilitating the installation of the circuit board 3240; it can be understood that in other embodiments, the circuit board 3240 can also be limited in the axial direction in other ways.

[0339] In this embodiment, the holding portion 3301 will clamp the circuit board 3240, and the second limiting portion 3302 and the top connecting portion 3303 will only contact and limit the circuit board 3240; it can be understood that in other embodiments, according to different working conditions, the second limiting portion 3302, the top connecting portion 3303 and the circuit board 3240 may also be connected in other ways.

[0340] A bracket fixing portion 339 is further provided at one end of the first bracket 330 close to the battery fixing portion 320. There are two bracket fixing portions 339, which are respectively arranged on two opposite sides of the first bracket 330; a fixing groove is provided on the inner side of the handle shell 3210 close to the tail of the battery 3230, so that after the motor 3220, battery 3230 and circuit board 3240 are installed, the internal bracket 300 as a whole can be directly pushed into the handle shell 3210, so that the bracket fixing portion 339 is snapped into the fixing groove, thereby realizing the fixation of the overall internal bracket 300 and internal components to the handle shell 3210.

[0341] In this embodiment, the bracket fixing portion 339 is roughly step-shaped, that is, the protruding part of the bracket fixing portion 339 extends into the fixing groove, and the other part of the bracket fixing portion 339 abuts against the wall outside the fixing groove, thereby facilitating the stable connection between the bracket fixing portion 339 and the handle housing 3210; it can be understood that in other embodiments, the bracket fixing portion 339 can also be in other forms.

[0342] A shock absorber 350 is provided on the inner side of the internal bracket 300. The shock absorber 350 is more flexible than the internal bracket 300 and supports the motor 3220 and / or battery 3230, thereby reducing vibration and noise generated by the motor 3220 and / or battery 3230, thereby improving user comfort. In this embodiment, the shock absorber 350 is integrally formed with the internal bracket 300, which can be formed by a process such as injection molding or overmolding. This ensures a stable connection between the shock absorber 350 and the internal bracket 300, further enhancing the vibration reduction effect. It is understood that in other embodiments, depending on different operating conditions, the shock absorber 350 can also be fixed to the inner side of the internal bracket 300 by other means such as gluing.

[0343] Specifically, in the part corresponding to the motor fixing part 310, a shock-absorbing part 350 is provided on the inner side of the first bracket 330 and the second bracket 340, so that when the first bracket 330 and the second bracket 340 are buckled together to fix the motor 3220, the shock-absorbing part 350 can basically cover the circumference of the motor 3220, which is beneficial to have a better shock-absorbing effect on the motor 3220. In the part corresponding to the battery fixing part 320, there is no shock-absorbing part 350 on the inner side of the first bracket 330, and a shock-absorbing part 350 is provided on the inner side of the second bracket 340, that is, in the axial length direction of the second bracket 340, the shock-absorbing part 350 basically extends along the entire length of the second bracket 340, thereby covering the motor fixing part 310 and the battery fixing part 320 on the second bracket 340. The shock-absorbing part 350 at the second bracket 340 contacts the battery 3230, plays a certain buffering role, which is beneficial to protecting the battery 3230. Therefore, whether during the installation process or when the electric toothbrush 3200 falls when in use, the shock-absorbing part 350 can better protect the battery 3230, which is beneficial to improving the service life of the electric toothbrush 3200.

[0344] A second heat dissipation hole 344 is also provided in the battery fixing portion 320 of the second first bracket 330, and the shock absorbing portion 350 is arranged on the inner side of the battery fixing portion 320 of the second bracket 340 to achieve the effects of shock absorption and heat dissipation. The shock absorbing portion 350 can withstand a high temperature of at least 100°C without deformation. The corresponding portion of the battery fixing portion 320 of the first bracket 330 of the second bracket 340 is not provided with a hole or is only provided with a smaller hole, so that the portion has integrity and full-surface mechanical strength to protect the battery 3230 from being pierced by sharp objects and causing safety accidents. In order to enhance the shock absorption effect of the battery fixing portion 320 of the first bracket 330 of the second bracket 340, foam can be provided between the battery 3230 and the inner wall of the first second bracket 340 to achieve shock absorption and noise reduction.

[0345] The shock absorbing part 350 is also provided with a protrusion 3381 shock absorbing protrusion 351. The shock absorbing protrusion 3381 is more protruding than other areas of the shock absorbing part 350, so that the shock absorbing protrusion 3381 is more easily in contact with the motor 3220 or the battery 3230. Due to the setting of the shock absorbing protrusion 3381, the contact area between the motor 3220 or the battery 3230 and the shock absorbing part 350 is smaller. Therefore, when the motor 3220 vibrates, less vibration is transmitted from the motor 3220 to the internal bracket 300 and the toothbrush handle, and more vibration noise is suppressed in the suspended area of ​​the non-shock absorbing protrusion 3381. The protrusion 3381 achieves better shock absorption and noise reduction, and the user feels less vibration transmitted by the motor 3220, and the experience is better. In order to better protect the battery 3230 , a buffer pad may also be provided between the battery 3230 and the second bracket 340 . The buffer pad and the shock-absorbing protrusion 3381 jointly protect the battery 3230 , further improving the reliability of the electric toothbrush 3200 .

[0346] The motor fixing portion 310 and the battery fixing portion 320 in the second bracket 340 are in a stepped transition, and when the second bracket 340 is fastened to the first bracket 330, the width of the motor fixing portion 310 formed by the second bracket 340 and the first bracket 330 in the fastening direction is smaller than the width of the battery fixing portion 320 formed by the second bracket 340 and the first bracket 330 in the fastening direction. This allows the relatively smaller motor 3220 and the relatively larger battery 3230 to be fixed more tightly by the first bracket 330 and the second bracket 340, further improving the integrity of the internal bracket 300, the motor 3220 and the battery 3230. When the motor 3220 generates vibration, due to the better integrity, it is not easily transmitted to the support handle housing 3210, which is also conducive to reducing noise and improving user comfort.

[0347] A latching portion 3304 is provided within the transition between the motor mounting portion 310 and the battery mounting portion 320. The latching portion 3304 abuts the motor 3220, thereby securing the motor 3220 relative to the motor mounting portion 310. In this embodiment, there are multiple latching portions 3304, specifically four, spaced apart along the circumference of the internal bracket 300 to better engage the motor 3220 and enhance the integrity of the motor 3220 and the internal bracket 300. It is understood that in other embodiments, the number of latching portions 3304 may be other values, as long as the purpose of stabilizing the motor 3220 is achieved.

[0348] In the above embodiments, the first bracket 330 and the second bracket 340 do not have a priority order or a position order, and the two brackets have the same status.

[0349] The present application may also provide the aforementioned internal bracket, which includes a first bracket and a second bracket, the first bracket and the second bracket interlocking with each other and housing a motor and a battery; the first bracket and the second bracket are each provided with a shock-absorbing portion on the inner side near the motor and the battery, the shock-absorbing portion being integrally formed with the first bracket and the second bracket, and the shock-absorbing portion contacts and cushions at least one of the motor or the battery. The internal bracket for an electric toothbrush provided in the present application, the first bracket and the second bracket interlocking with each other and housing the motor and the battery, thereby ensuring that the first bracket, the second bracket, the motor, and the battery have good integrity and a more compact structure. Since the structure is relatively compact, the resonance caused by vibration on each component is relatively small, which is beneficial to the overall reduction of vibration and noise; and the shock-absorbing portion integrally formed between the first bracket and the second bracket has good stability and can effectively achieve the functions of shock and noise reduction.

[0350] The present application also provides an electric toothbrush with the above-mentioned internal bracket, so as to reduce noise and vibration and improve the comfort of use.

[0351] In order to achieve high-frequency reciprocating motion of the brush head, most existing electric toothbrushes usually use physical structures to hold and limit the movement. However, this method is only applicable to electric toothbrushes with a small-angle swing angle of the brush head between 3° and 9°. When the electric toothbrush wants to achieve a large-angle swing of the brush head, such as 30° to 60°, due to the larger rotation angle, the physical structure limit will be subjected to greater mechanical stress, causing wear and deformation to affect the accuracy. In addition, due to large-scale motion, the physical structure cannot accurately stabilize the accurate position and speed within a large range, and higher requirements are placed on the durability and elasticity of the material, etc. These will lead to the inability to achieve precise control of the physical structure limit, which needs to be improved. In order to solve the technical problem that the swing angle of the electric toothbrush cannot be accurately controlled, the present application also provides an electric toothbrush. Figures 34 to 42 correspond to the description of this solution.

[0352] Example 34 of this scheme

[0353] 34 , an embodiment of the present application provides an electric toothbrush, which may include a stator 4100, a rotating shaft 4200, a magnetic member 4300, and a sensing assembly 4400. The magnetic member 4300 is disposed on the rotating shaft 4200. The stator 4100 can drive the magnetic member 4300 to rotate, and the magnetic member 4300 drives the rotating shaft 4200 to rotate about the axial direction of the rotating shaft 4200. The sensing assembly 4400 is spaced apart from the magnetic member 4300. The sensing assembly 4400 detects the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic member 4300, so that the electric toothbrush controls the rotating shaft 4200 to rotate to a desired position.

[0354] The magnetic part 4300 of the electric toothbrush provided in the embodiment of the present application is arranged on the rotating shaft 4200, and the stator 4100 can drive the magnetic part 4300 to rotate, and further the magnetic part 4300 drives the rotating shaft 4200 to rotate, so that the rotating shaft 4200 can generate high-frequency vibration, so that the electric toothbrush has a better cleaning power. The magnetic part 4300 is used as part of the transmission structure: and the sensing component 4400 of the electric toothbrush can sense the magnetic field of the magnetic part 4300 on the rotating shaft 4200, thereby detecting the moving position of the rotating shaft 4200, and realizing The electric toothbrush controls the rotating shaft 4200 to rotate precisely to the expected position, and the magnetic part 4300 serves as part of the position detection of the rotating shaft 4200 during this process. In summary, the magnetic part 4300 of the electric toothbrush can realize both the transmission function and the function of controlling the swing angle of the electric toothbrush. A single magnetic part 4300 has multiple functions, and the electric toothbrush does not need to introduce other structures, which greatly saves costs. Moreover, due to the omission of other structures, it is also more conducive to the miniaturized design of the electric toothbrush, especially the large-angle swing function of the electric toothbrush with a smaller volume.

[0355] Of course, the electric toothbrush senses the magnetic field of the magnetic part 4300 through the sensing component 4400, and then controls the position of the rotating shaft 4200. Compared with traditional physical limits, this method is realized through circuits in terms of detection and control, which enables the feedback and action of the electric toothbrush to be completed quickly and accurately. When the electric toothbrush swings at a large angle, the control is more precise through this method, which is conducive to improving the stability of the electric toothbrush. It should be noted that the magnetism of the sensing magnetic part 4300 can be the magnetic field strength, the change of the magnetic pole of the magnetic field, or other information of the magnetic field.

[0356] In some embodiments, the magnetic member 4300 can be arranged between the stator 4100 and the rotating shaft 4200, and the stator 4100 is arranged on the outer periphery of the rotating shaft 4200. The magnetic member 4300 can serve as part of the driving component that drives the rotating shaft 4200 to rotate. The magnetic member 4300 is arranged on the outer periphery of the rotating shaft 4200. The magnetic field of the stator 4100 interacts with the magnetic field of the magnetic member 4300, so that the stator 4100 can drive the magnetic member 4300 to rotate, and further drive the rotating shaft 4200 to rotate through the magnetic member 4300.

[0357] In some embodiments, the sensing assembly 4400 can be spaced apart from the outer circumference of the magnetic member 4300 in the radial direction of the rotating shaft 4200. The sensing assembly 4400 can sense the magnetic field around the magnetic member 4300. The sensing assembly 4400 is located between the stator 4100 and the magnetic member 4300, and the sensing assembly 4400 and the stator 4100 are spaced apart in the radial direction of the rotating shaft 4200. Alternatively, the sensing assembly 4400 can be spaced apart from the magnetic member 4300 in the axial direction of the rotating shaft 4200. The magnetic member 4300 drives the rotating shaft 4200 to rotate relative to the sensing assembly 4400. The sensing assembly 4400 senses the magnetic field of the magnetic member 4300 and detects the moving position of the rotating shaft 4200.

[0358] In some other embodiments, the brush head of an electric toothbrush can be installed on the end of the rotating shaft 4200 facing away from the sensing component 4400. The brush head can rotate under the drive of the rotating shaft 4200 to achieve axial swing of the brush head around the rotating shaft 4200 and clean the teeth.

[0359] In some examples, the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing changes in the magnetic field strength of the magnetic member 4300, or the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic pole arrangement of the magnetic member 4300, or the sensing component 4400 can also detect the moving position of the rotating shaft 4200 by sensing changes in the magnetic field caused by the rotation of the magnetic member 4300.

[0360] Referring to Figure 35 , magnetic member 4300 is a magnetic column that circumferentially covers at least a portion of rotating shaft 4200. The magnetic column can extend axially of rotating shaft 4200. Inductive assembly 4400 is spaced relative to the magnetic column. Stator 4100 drives the magnetic column to rotate, which in turn drives rotating shaft 4200. The magnetic column can be an annular magnetic column, i.e., it has a through hole extending axially at its center and penetrating both axial ends of the magnetic column. The annular magnetic column can be sleeved onto the outside of rotating shaft 4200.

[0361] Referring to FIG35 , it can be understood that the sidewalls of the magnetic pillars can be non-enclosed structures, that is, the sidewalls of the magnetic pillars can not be continuous and closed sides. As shown in FIG35 , the axial view of the magnetic pillars with non-enclosed sidewalls can be a non-enclosed annular structure with a gap.

[0362] In this way, by setting the magnetic part 4300 as a magnetic column, the magnetic column at least covers a portion of the rotating shaft 4200 along the circumferential direction of the rotating shaft 4200, the stator 4100 drives the magnetic column to rotate, and the magnetic column further drives the rotating shaft 4200 to rotate. The sensing component 4400 is set at an interval relative to the magnetic column, so that the magnetic part 4300 can not only be used for sensing the sensing component 4400 to detect the rotational movement position of the rotating shaft 4200, but also can be used to drive the rotating shaft 4200 as part of the transmission structure for the movement of the electric toothbrush rotating shaft 4200. Therefore, the magnetic column has multiple functions, which can be detected and transmitted, avoiding the introduction of other structures, which is beneficial to saving the cost of the electric toothbrush, and at the same time helping to reduce the volume of the electric toothbrush and improve space utilization.

[0363] 36 , in some embodiments, the induction component 4400 can be spaced apart from the magnetic component 4300 in the axial direction of the rotating shaft 4200 .

[0364] In this way, by setting the sensing component 4400 at a distance from the magnetic component 4300 in the axial direction of the rotating shaft 4200, the sensing component 4400 and the magnetic component 4300 can be arranged at a distance in the axial direction of the rotating shaft 4200, which is beneficial to reducing the volume of the electric toothbrush and obtaining an electric toothbrush with a relatively smaller width. In addition, by setting the sensing component 4400 relatively in the axial direction, the interference of the sensing component 4400 on the radial structure of the electric toothbrush is reduced, such as reducing the interference with the stator 4100, which is more beneficial to the structural design of the electric toothbrush.

[0365] In some embodiments, if the sensing component 4400 can be spaced apart from the magnetic component 4300 in the axial direction, the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic component 4300 toward one end of the sensing component 4400 .

[0366] 36 , in some embodiments, the magnetic member 4300 extends continuously along the circumference of the rotating shaft 4200 and covers the rotating shaft 4200. The magnetic member 4300 can completely cover the outer side of the rotating shaft 4200, and the sidewall of the magnetic member 4300 is continuous and closed. The axial view of the magnetic member 4300 can be an annular structure as shown in FIG36 .

[0367] With such arrangement, the magnetic part 4300 completely covers the rotating shaft 4200 in the circumferential direction, so that when the stator 4100 drives the magnetic part 4300 to rotate, the magnetic part 4300 can be better subjected to force in the circumferential direction, and the stator 4100 can further better drive the magnetic part 4300 to rotate. At the same time, the magnetic part 4300 can better drive the rotating shaft 4200 to rotate, which is beneficial to improving the transmission stability of the electric toothbrush transmission structure; the combined effect makes the magnetic part 4300 have a better transmission function and the magnetic part 4300 can be detected.

[0368] 35 , in some embodiments, the magnetic member 4300 may include at least one pair of n-pole and s-pole, and the n-pole and s-pole are disposed adjacent to each other on an end surface of one end of the magnetic member 4300 .

[0369] In this arrangement, the magnetic part 4300 includes at least one pair of n-pole and s-pole, and the n-pole and s-pole are arranged adjacent to each other in sequence on the end face of one end of the magnetic part 4300. This enables the sensing component 4400 to detect the moving position of the rotating shaft 4200 by sensing the magnetic field of at least one pair of n-pole and s-pole, so that the electric toothbrush controls the rotating shaft 4200 to rotate to the expected position.

[0370] Referring to Figure 35, in a specific implementation, the magnetic component 4300 can have a pair of n-pole and s-pole, and the n-pole and s-pole are arranged adjacent to each other. If the magnetic component 4300 is a magnetic column, the end face of the magnetic column facing one end of the sensing component 4400 can have a pair of n-pole and s-pole. The sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the magnetic field of the n-pole and s-pole on the magnetic component 4300.

[0371] Referring to Figure 37, in an exemplary embodiment, the magnetic member 4300 can also have two pairs of n poles and s poles, and the n poles and s poles are arranged adjacent to each other in sequence. If the magnetic member 4300 is a magnetic column, the end face of the magnetic column facing the sensing component 4400 can have two pairs of n poles and s poles, and the two pairs of n poles and s poles are alternately arranged in the order of n pole-s pole-n pole-s pole on the end face of the magnetic column facing the sensing component 4400. The sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the magnetic field of the two pairs of n poles and s poles.

[0372] 37 , in some embodiments, there may be multiple magnetic members 4300 , and the multiple magnetic members 4300 are sequentially arranged along the circumference of the rotating shaft 4200 .

[0373] The plurality of magnetic members 4300 may be arranged in a sequentially spaced arrangement along the circumference of the rotating shaft 4200, or the plurality of magnetic members 4300 may be arranged in close contact with each other along the axial direction of the rotating shaft 4200. In some embodiments, the number of magnetic members 4300 may be 2, 4, 6 or even more.

[0374] In this way, multiple magnetic parts 4300 are arranged in sequence in the circumferential direction of the rotating shaft 4200. The multiple magnetic parts 4300 can be arranged in close contact with each other, or can be arranged with intervals between adjacent parts. The multiple magnetic parts 4300 can be easily adjusted to the position set on the rotating shaft 4200, thereby meeting the needs under corresponding working conditions, which is conducive to the flexible design of the electric toothbrush.

[0375] In some examples, the magnetic member 4300 can be a magnetic column, and there are two magnetic members 4300. Both magnetic columns extend axially of the rotating shaft 4200, and the two magnetic columns are arranged in sequence along the circumference of the rotating shaft 4200. The sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of each magnetic column toward one end of the sensing component 4400.

[0376] Based on the above embodiment, when there are multiple magnetic members 4300 , one end of the magnetic member 4300 may be an n-pole or an s-pole, and the polarities of the ends of two adjacent magnetic members 4300 are opposite.

[0377] In this way, by setting each magnetic part 4300 of the multiple magnetic parts 4300 toward one end of the sensing component 4400 as an n-pole or s-pole, and making the polarities of the ends of two adjacent magnetic parts 4300 toward the sensing component 4400 opposite, the sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the n-pole or s-pole magnetic field of the multiple magnetic parts 4300 toward one end of the sensing component 4400, so that the electric toothbrush controls the rotating shaft 4200 to rotate to the expected position.

[0378] Furthermore, by having one end of multiple magnetic parts 4300 correspond to the n-pole or s-pole, the magnetic field range of the n-pole or s-pole can be flexibly adjusted through each magnetic part 4300, which is further conducive to the flexible setting of the electric toothbrush that can achieve transmission and detect the magnetic part 4300 under corresponding working conditions.

[0379] In one example, if there are two magnetic parts 4300, the magnetic poles on one end of the two magnetic parts 4300 facing the sensing component 4400 can be n poles or s poles. For example, when the magnetic pole of one end of the magnetic part 4300 facing the sensing component 4400 can be n pole, the magnetic pole of the other magnetic part 4300 facing the sensing component 4400 can be s pole.

[0380] Referring to Figure 37, in another example, if there are four magnetic members 4300, the magnetic poles on one end of the four magnetic members 4300 facing the sensing component 4400 can all be n poles or s poles, and the magnetic poles on one end of the four magnetic members 4300 facing the sensing component 4400 are alternately arranged in the order of n pole-s pole-n pole-s pole.

[0381] 36 , in one possible implementation, the induction component 4400 is spaced apart from the magnetic component 4300 in the radial direction of the rotating shaft 4200 .

[0382] In this way, by spacing the sensing component 4400 and the magnetic component 4300 in the radial direction of the rotating shaft 4200, the sensing component 4400 and the magnetic component 4300 can be spaced apart in the radial direction of the rotating shaft 4200, thereby reducing the space occupancy rate of the sensing component 4400 and the magnetic component 4300 in the axial direction of the rotating shaft 4200, thereby shortening the length of the electric toothbrush in the axial direction of the rotating shaft 4200.

[0383] In one example, if the magnetic member 4300 includes a pair of n-pole and s-pole, and the n-pole and s-pole are adjacent to each other on the circumferential surface of the magnetic member 4300 facing the sensing component 4400, the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the pair of n-pole and s-pole on the circumferential surface of the magnetic member 4300.

[0384] In another example, if the magnetic member 4300 includes two pairs of n poles and s poles, the two pairs of n poles and s poles are adjacent to each other on the circumferential surface of the magnetic member 4300 facing the sensing component 4400, and the n pole-s pole-n pole-s pole are alternately arranged on the axial surface of the magnetic member 4300, then the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the two pairs of n poles and s poles on the circumferential surface of the magnetic member 4300.

[0385] 34 and 36 , in one possible implementation, the sensing component 4400 may include a Hall sensor, which detects the moving position of the rotating shaft 4200 through the magnetic field strength of the magnetic member 4300 .

[0386] With such a configuration, the sensing component 4400 uses the Hall sensor, thereby enabling the Hall sensor to detect the moving position of the rotating shaft 4200 by sensing the magnetic field strength of the magnetic member 4300, and allowing the electric toothbrush to control the rotating shaft 4200 to rotate to the expected position.

[0387] Referring to Figure 34, in some examples, if the magnetic member 4300 is a magnetic column, the magnetic column and the sensing component 4400 are spaced apart in the axial direction of the rotating shaft 4200, and the end of the magnetic column facing the sensing component 4400 has a pair of n poles and s poles, then the sensing component 4400 can be a Hall sensor, and the number of Hall sensors can be two, and the two Hall sensors are spaced apart in the circumferential direction of the rotating shaft 4200.

[0388] In a specific implementation, the two Hall sensors can be a first Hall sensor and a second Hall sensor, which are spaced apart and electrically controlled to detect induced voltages in different ranges. For example, the first Hall sensor has an induced voltage range of 0V-2.5V, while the second Hall sensor has an induced voltage range of 2.5V-5V. When the magnetic member 4300 drives the rotating shaft 4200 to swing back and forth axially, the first Hall sensor can generate a voltage value within 0V-2.5V, and the second Hall sensor can generate another voltage value within 2.5V-5V, thereby achieving accurate detection of the position of the magnetic member 4300.

[0389] In a possible implementation, the sensing component 4400 may include a magnetic encoder, which detects the moving position of the rotating shaft 4200 through the magnetic pole arrangement of the magnetic member 4300 .

[0390] With such a configuration, the sensing component 4400 passes through the magnetic encoder, thereby enabling the magnetic encoder to detect the moving position of the rotating shaft 4200 through the magnetic pole arrangement of the magnetic member 4300, and enables the electric toothbrush to control the rotating shaft 4200 to rotate to the expected position.

[0391] In a possible implementation, the sensing component 4400 may include an inductive sensor, which detects the moving position of the rotating shaft 4200 through changes in the magnetic field caused by the rotation of the magnetic member 4300 .

[0392] With such a configuration, the sensing component 4400 may include an inductive sensor, so that the inductive sensor can detect the moving position of the rotating shaft 4200 through the change in the magnetic field caused by the rotation of the magnetic member 4300, and enable the electric toothbrush to control the rotating shaft 4200 to rotate to the expected position.

[0393] 34 , in some examples, the distance between the sensing component 4400 and the magnetic member 4300 is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0394] In this way, by setting the distance between the sensing component 4400 and the magnetic part 4300 to be greater than or equal to 0.2 mm and less than or equal to 1 mm, the sensing component 4400 can accurately and stably sense the magnetic field, thereby facilitating the sensing component 4400 to accurately and stably detect the moving position of the rotating shaft 4200, so that the electric toothbrush can accurately and stably control the rotating shaft 4200 to rotate to the expected position, preventing the sensing component from interfering with other structures due to the close distance, and at the same time meeting safety requirements, and preventing the signal from being weak due to the distance being too far, thereby avoiding the function of the sensing component 4400 to identify the magnetic part 4300 from being destroyed.

[0395] In some embodiments, if the distance between the sensing component 4400 and the magnetic part 4300 is too large, for example, the distance between the sensing component 4400 and the magnetic part 4300 is greater than 1 mm, the sensing component 4400 will not be able to sense the magnetic field of the magnetic part 4300 due to the large distance between the sensing component 4400 and the magnetic part 4300, thereby affecting the sensing component 4400 to detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic part 4300.

[0396] Continuing with reference to Figure 34, in some embodiments, the electric toothbrush may further include a motor housing 4500, a stator 4100, a rotating shaft 4200 and a magnetic component 4300 are arranged in the motor housing 4500, and the electric toothbrush may further include a circuit board 4600, the circuit board 4600 is arranged in the motor housing 4500, the induction component 4400 is arranged on the circuit board 4600, and the circuit board 4600 is provided with an avoidance hole, which is used to avoid the rotating shaft 4200.

[0397] In this way, the electric toothbrush includes a motor housing 4500, and the stator 4100, the rotating shaft 4200 and the magnetic part 4300, as well as the induction component 4400 and the circuit board 4600 are all arranged in the motor housing 4500, which can improve the space utilization of the motor housing 4500, help reduce the volume of the electric toothbrush, and is arranged outside the motor housing 4500 relative to the circuit board 4600, avoids the introduction of other external structures, prevents the increase in the overall length of the toothbrush, and further helps to achieve a miniaturized design of the electric toothbrush; at the same time, an avoidance hole is provided on the circuit board 4600, so that the rotating shaft 4200 can be passed through the avoidance hole of the circuit board 4600, so that the rotating shaft 4200 can rotate relative to the circuit board 4600 without the circuit board 4600 interfering with its rotation, further making the layout between the various structures arranged in the motor housing 4500 more compact, improving the space utilization of the motor housing 4500, and further reducing the volume of the motor.

[0398] In some embodiments, the circuit board 4600 can be disposed in the motor housing 4500 , and the circuit board 4600 can be connected to the inner wall of the motor housing 4500 , or the circuit board 4600 can be connected to the housing and rotatably connected to the rotating shaft 4200 .

[0399] The sensing component 4400 can be electrically connected to the circuit board 4600 , or the sensing component 4400 can be directly mounted on the circuit board 4600 , and the sensing component 4400 can be mounted on the side of the circuit board 4600 facing the magnetic component 4300 , so that the sensing component 4400 can sense the magnetic field of the magnetic component 4300 .

[0400] 34 , in some embodiments, a snap-fit ​​portion 4710 is provided inside the motor housing 4500 , and a card interface 4610 is provided on the circuit board 4600 . The snap-fit ​​portion 4710 can be detachably connected to the card interface 4610 to set the circuit board 4600 in the motor housing 4500 .

[0401] In this way, by arranging a clamping portion 4710 inside the motor housing 4500 and arranging a card interface 4610 matching the clamping portion 4710 on the circuit board 4600, the circuit board 4600 is connected to the motor housing 4500 through the detachable connection between the card interface 4610 and the clamping portion 4710, so as to facilitate the disassembly and separate maintenance of the motor housing 4500 and the circuit board 4600, thereby improving the convenience of maintenance and replacement of the circuit board 4600 and thus improving the convenience of using the electric toothbrush.

[0402] Continuing to refer to FIG. 34 , based on the above embodiment, the electric toothbrush may further include a bracket 4700 , the stator 4100 is disposed on the bracket 4700 , and a clamping portion 4710 is formed at one end of the bracket 4700 .

[0403] In this way, the electric toothbrush can include a bracket 4700, which is arranged on the stator 4100 in the motor housing 4500, and a clamping portion 4710 is formed at one end of the bracket 4700 facing the circuit board 4600, so as to realize a detachable connection between the circuit board 4600 and the bracket 4700 through the clamping portion 4710 and the card interface 4610. The bracket 4700 has the function of fixing the stator 4100 and the circuit board 4600, which is conducive to reducing the volume of the electric toothbrush and improving the installation stability of the circuit board 4600 in the motor housing 4500 through the compact structure.

[0404] Example 2 of this solution

[0405] 38 and 39 , an embodiment of the present application further provides an electric toothbrush, which may include a stator 4100, a rotating shaft 4200, a magnetic component 4300, an axial drive mechanism 4900, and a sensing component 4400. The magnetic component 4300 is disposed on the rotating shaft 4200, and the sensing component 4400 is spaced apart from the magnetic component 4300. The stator 4100 can drive the rotating shaft 4200 and the magnetic component 4300 to rotate together around the axial direction of the rotating shaft 4200, and the axial drive mechanism 4900 can drive the rotating shaft 4200 and the magnetic component 4300 to move together along the axial direction.

[0406] When the axial driving mechanism 4900 drives the rotating shaft 4200 and the magnetic member 4300 to move in the axial direction together, the sensing component 4400 moves in the axial direction at the same time, so that the distance between the sensing component 4400 and the magnetic member 4300 remains relatively unchanged.

[0407] The sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic member 4300, so that the electric toothbrush controls the rotating shaft 4200 to rotate to a desired position.

[0408] Referring to Figure 39 , in one possible implementation, stator 4100 can be driven to rotate by other magnetic structures disposed on rotating shaft 4200, thereby driving rotating shaft 4200 to rotate. Furthermore, magnetic member 4300 serves to enable sensing assembly 4400 to detect the moving position of rotating shaft 4200 by sensing the magnetic field of magnetic member 4300.

[0409] Referring to FIG38 , in another possible implementation, the stator 4100 can drive the magnetic member 4300 to rotate, which in turn drives the rotating shaft 4200 to rotate, thereby rotating the electric toothbrush. Furthermore, the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic member 4300. This allows the magnetic member 4300 to have both the function of driving the rotating shaft 4200 to rotate and the function of being sensed by the sensing component 4400. This can reduce the manufacturing cost of the electric toothbrush and improve the space utilization of the electric toothbrush.

[0410] The present application also provides an electric toothbrush, wherein a stator 4100 can drive a rotating shaft 4200 and a magnetic member 4300 to rotate together in the axial direction of the rotating shaft 4200, and an axial drive mechanism 4900 can drive the rotating shaft 4200 and the magnetic member 4300 to move together in the axial direction, so that the rotating shaft 4200 of the electric toothbrush has dual degrees of freedom of motion: circumferential swing and axial movement. The dual degrees of freedom enable the electric toothbrush to better clean and expand the cleaning area when brushing teeth, which is generally beneficial to improving the cleaning effect of the electric toothbrush.

[0411] When the rotating shaft 4200 and the magnetic part 4300 of the electric toothbrush move in the axial direction, the sensing component 4400 moves in the axial direction at the same time, and the distance between the sensing component 4400 and the magnetic part 4300 remains basically unchanged. This avoids the failure of the sensing component 4400 to detect the magnetic part 4300 due to the change in the distance between the sensing component 4400 and the magnetic part 4300 when the magnetic part 4300 moves axially, further ensuring that the electric toothbrush's function of accurately controlling the rotating shaft 4200 is not destroyed, which is beneficial to improving the functional stability of the electric toothbrush and thus facilitating the use of the electric toothbrush; of course, in this solution, the sensing component 4400 senses the magnetic field of the magnetic part 4300, which can also be the magnetic field strength, the change of the magnetic pole of the magnetic field, or other information of the magnetic field.

[0412] It should be noted that when the sensing component 4400 moves in the axial direction at the same time, the distance between the sensing component 4400 and the magnetic part 4300 remains basically unchanged. It can be understood that during the movement, a certain error is allowed to exist in the distance between the sensing component 4400 and the magnetic part 4300, and the error range is appropriate not to affect the magnetic field of the magnetic part 4300 sensed by the sensing component 4400.

[0413] It should be noted that the magnetic component 4300 in this solution can be detected as the sensing component 4400. There is no restriction on whether the magnetic component 4300 can be driven by the stator 4100. That is, the magnetic component 4300 can be driven by the stator 4100; or it can not be driven by the stator 4100, but the stator 4100 drives the rotor through other magnetic components.

[0414] 35 and 38 , the magnetic member 4300 is a magnetic column 4300a. The magnetic column 4300a covers at least a portion of the rotating shaft 4200 along the circumferential direction of the rotating shaft 4200. The magnetic column 4300a can extend axially of the rotating shaft 4200. The induction assembly 4400 is spaced apart from the magnetic column 4300a. The stator 4100 drives the magnetic column 4300a to rotate, which in turn drives the rotating shaft 4200. The magnetic column 4300a can be an annular magnetic column 4300a, i.e., the center of the magnetic column 4300a has a through hole extending axially and penetrating both axial ends of the magnetic column 4300a. The annular magnetic column 4300a can be sleeved onto the outside of the rotating shaft 4200.

[0415] Referring to FIG35 , it can be understood that the sidewalls of magnetic pillar 4300a can be non-enclosed, that is, the sidewalls of magnetic pillar 4300a can not be continuous and closed. As shown in FIG35 , the axial view of magnetic pillar 4300a with a non-enclosed sidewall can be a non-enclosed annular structure with a gap.

[0416] In this way, by setting the magnetic part 4300 as a magnetic column 4300a, the magnetic column 4300a at least covers a portion of the rotating shaft 4200 along the circumferential direction of the rotating shaft 4200, the stator 4100 drives the magnetic column 4300a to rotate, and the magnetic column 4300a further drives the rotating shaft 4200 to rotate. The sensing component 4400 is spaced relative to the magnetic column 4300a, so that the magnetic part 4300 can not only be used for sensing the sensing component 4400 to detect the rotational movement position of the rotating shaft 4200, but also can be used to drive the rotating shaft 4200 as part of the transmission structure for the movement of the rotating shaft 4200 of the electric toothbrush. Therefore, the magnetic column 4300a has multiple functions, which can be detected and transmitted, avoiding the introduction of other structures, which is beneficial to saving the cost of the electric toothbrush, and at the same time helping to reduce the volume of the electric toothbrush and improve space utilization.

[0417] 38 , in some embodiments, the induction component 4400 can be spaced apart from the magnetic component 4300 in the axial direction of the rotating shaft 4200 .

[0418] In this way, by setting the sensing component 4400 at a distance from the magnetic component 4300 in the axial direction of the rotating shaft 4200, the sensing component 4400 and the magnetic component 4300 can be arranged at a distance in the axial direction of the rotating shaft 4200, which is beneficial to reducing the volume of the electric toothbrush and obtaining an electric toothbrush with a relatively smaller width. In addition, by setting the sensing component 4400 relatively in the axial direction, the interference of the sensing component 4400 on the radial structure of the electric toothbrush is reduced, such as reducing the interference with the stator 4100, which is more beneficial to the structural design of the electric toothbrush.

[0419] In some embodiments, if the sensing component 4400 can be spaced apart from the magnetic component 4300 in the axial direction, the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic component 4300 toward one end of the sensing component 4400 .

[0420] 36 , in some embodiments, the magnetic member 4300 extends continuously along the circumference of the rotating shaft 4200 and covers the rotating shaft 4200. The magnetic member 4300 can completely cover the outer side of the rotating shaft 4200, and the sidewall of the magnetic member 4300 is continuous and closed. The axial view of the magnetic member 4300 can be an annular structure as shown in FIG36 .

[0421] With such arrangement, the magnetic part 4300 completely covers the rotating shaft 4200 in the circumferential direction, so that when the stator 4100 drives the magnetic part 4300 to rotate, the magnetic part 4300 can be better subjected to force in the circumferential direction, and the stator 4100 can further better drive the magnetic part 4300 to rotate. At the same time, the magnetic part 4300 can better drive the rotating shaft 4200 to rotate, which is beneficial to improving the transmission stability of the electric toothbrush transmission structure; the combined effect makes the magnetic part 4300 have a better transmission function and the magnetic part 4300 can be detected.

[0422] 36 , in some embodiments, the magnetic member 4300 may include at least one pair of n-pole and s-pole, and the n-pole and s-pole are sequentially arranged adjacent to each other on an end surface of one end of the magnetic member 4300 .

[0423] In this arrangement, the magnetic part 4300 can include at least one pair of n-pole and s-pole, and the n-pole and s-pole are arranged adjacent to each other in sequence on the end face of one end of the magnetic part 4300, so that the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of at least one pair of n-pole and s-pole, so that the electric toothbrush controls the rotating shaft 4200 to rotate to the expected position.

[0424] Referring to Figure 36, in a specific implementation, the magnetic component 4300 can have a pair of n-pole and s-pole, and the n-pole and s-pole are arranged adjacent to each other. If the magnetic component 4300 is a magnetic column 4300a, the end face of the magnetic column 4300a facing the sensing component 4400 can have a pair of n-pole and s-pole. The sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the magnetic field of the n-pole and s-pole on the magnetic component 4300.

[0425] Referring to Figure 37, in an exemplary embodiment, the magnetic member 4300 can also have two pairs of n poles and s poles, and the n poles and s poles are arranged adjacent to each other in sequence. If the magnetic member 4300 is a magnetic column 4300a, the end face of the magnetic column 4300a facing the sensing component 4400 can have two pairs of n poles and s poles, and the two pairs of n poles and s poles are alternately arranged in an order of n pole-s pole-n pole-s pole on the end face of the magnetic column 4300a facing the sensing component 4400. The sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the magnetic fields of the two pairs of n poles and s poles.

[0426] 37 , in some embodiments, there may be multiple magnetic members 4300 , and the multiple magnetic members 4300 are sequentially arranged along the circumference of the rotating shaft 4200 .

[0427] The plurality of magnetic members 4300 may be arranged in a sequentially spaced arrangement along the circumference of the rotating shaft 4200, or the plurality of magnetic members 4300 may be arranged in close contact with each other along the axial direction of the rotating shaft 4200. In some embodiments, the number of magnetic members 4300 may be 2, 4, 6 or even more.

[0428] In this way, multiple magnetic parts 4300 are arranged in sequence in the circumferential direction of the rotating shaft 4200. The multiple magnetic parts 4300 can be arranged in close contact with each other, or can be arranged with intervals between adjacent parts. The multiple magnetic parts 4300 can be easily adjusted to the position set on the rotating shaft 4200, thereby meeting the needs under corresponding working conditions, which is conducive to the flexible design of the electric toothbrush.

[0429] In some examples, the magnetic member 4300 can be a magnetic column 4300a, and there are two magnetic members 4300. Both magnetic columns 4300a extend axially of the rotating shaft 4200, and the two magnetic columns 4300a are arranged in sequence along the circumference of the rotating shaft 4200. The sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of each magnetic column 4300a toward one end of the sensing component 4400.

[0430] 37 , based on the above embodiment, when there are multiple magnetic members 4300 , one end of the magnetic member 4300 may be an n-pole or an s-pole, and the polarities of the ends of two adjacent magnetic members 4300 are opposite.

[0431] In this way, by setting each magnetic part 4300 of the multiple magnetic parts 4300 toward one end of the sensing component 4400 as an n-pole or s-pole, and making the polarities of the ends of two adjacent magnetic parts 4300 toward the sensing component 4400 opposite, the sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the n-pole or s-pole magnetic field of the multiple magnetic parts 4300 toward one end of the sensing component 4400, so that the electric toothbrush controls the rotating shaft 4200 to rotate to the expected position.

[0432] Furthermore, by having one end of multiple magnetic parts 4300 correspond to the n-pole or s-pole, the magnetic field range of the n-pole or s-pole can be flexibly adjusted through each magnetic part 4300, which is further conducive to the flexible setting of the electric toothbrush that can achieve transmission and detect the magnetic part 4300 under corresponding working conditions.

[0433] In one example, if there are two magnetic parts 4300, the magnetic poles on one end of the two magnetic parts 4300 facing the sensing component 4400 can be n poles or s poles. For example, when the magnetic pole of one end of the magnetic part 4300 facing the sensing component 4400 can be n pole, the magnetic pole of the other magnetic part 4300 facing the sensing component 4400 can be s pole.

[0434] Referring to Figure 37, in another example, if there are four magnetic members 4300, the magnetic poles on one end of the four magnetic members 4300 facing the sensing component 4400 can all be n poles or s poles, and the magnetic poles on one end of the four magnetic members 4300 facing the sensing component 4400 are alternately arranged in the order of n pole-s pole-n pole-s pole.

[0435] 36 , in one possible implementation, the induction component 4400 is spaced apart from the magnetic component 4300 in the radial direction of the rotating shaft 4200 .

[0436] In this way, by spacing the sensing component 4400 and the magnetic component 4300 in the radial direction of the rotating shaft 4200, the sensing component 4400 and the magnetic component 4300 can be spaced apart in the radial direction of the rotating shaft 4200, thereby reducing the space occupancy rate of the sensing component 4400 and the magnetic component 4300 in the axial direction of the rotating shaft 4200, thereby shortening the length of the electric toothbrush in the axial direction of the rotating shaft 4200.

[0437] In one example, if the magnetic member 4300 includes a pair of n-pole and s-pole, and the n-pole and s-pole are adjacent to each other on the circumferential surface of the magnetic member 4300 facing the sensing component 4400, the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the pair of n-pole and s-pole on the circumferential surface of the magnetic member 4300.

[0438] Referring to Figure 37, in another example, if the magnetic member 4300 includes two pairs of n poles and s poles, the two pairs of n poles and s poles are arranged adjacent to each other on the circumferential surface of the magnetic member 4300 facing the sensing component 4400, and the n pole-s pole-n pole-s pole are alternately arranged on the axial surface of the magnetic member 4300, then the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the two pairs of n poles and s poles on the circumferential surface of the magnetic member 4300.

[0439] 36 and 38 , in one possible implementation, the sensing component 4400 may include a Hall sensor, which detects the moving position of the rotating shaft 4200 through the magnetic field strength of the magnetic member 4300 .

[0440] With such a configuration, the sensing component 4400 uses the Hall sensor, thereby enabling the Hall sensor to detect the moving position of the rotating shaft 4200 by sensing the magnetic field strength of the magnetic member 4300, and allowing the electric toothbrush to control the rotating shaft 4200 to rotate to the expected position.

[0441] In some examples, if the magnetic member 4300 is a magnetic column 4300a, the magnetic column 4300a and the sensing component 4400 are spaced apart in the axial direction of the rotating shaft 4200, and the end of the magnetic column 4300a facing the sensing component 4400 has a pair of n poles and s poles, then the sensing component 4400 can be a Hall sensor, and the number of Hall sensors can be two, and the two Hall sensors are spaced apart in the circumferential direction of the rotating shaft 4200.

[0442] In a specific implementation, the two Hall sensors can be a first Hall sensor and a second Hall sensor, which are spaced apart and electrically controlled to detect induced voltages in different ranges. For example, the first Hall sensor has an induced voltage range of 0V-2.5V, while the second Hall sensor has an induced voltage range of 2.5V-5V. When the magnetic member 4300 drives the rotating shaft 4200 to swing back and forth axially, the first Hall sensor can generate a voltage value within 0V-2.5V, and the second Hall sensor can generate another voltage value within 2.5V-5V, thereby achieving accurate detection of the position of the magnetic member 4300.

[0443] In a possible implementation, the sensing component 4400 may include a magnetic encoder, which detects the moving position of the rotating shaft 4200 through the magnetic pole arrangement of the magnetic member 4300 .

[0444] With such a configuration, the sensing component 4400 passes through the magnetic encoder, thereby enabling the magnetic encoder to detect the moving position of the rotating shaft 4200 through the magnetic pole arrangement of the magnetic member 4300, and enables the electric toothbrush to control the rotating shaft 4200 to rotate to the expected position.

[0445] In a possible implementation, the sensing component 4400 may include an inductive sensor, which detects the moving position of the rotating shaft 4200 through changes in the magnetic field caused by the rotation of the magnetic member 4300 .

[0446] With such a configuration, the sensing component 4400 may include an inductive sensor, so that the inductive sensor can detect the moving position of the rotating shaft 4200 through the change in the magnetic field caused by the rotation of the magnetic member 4300, and enable the electric toothbrush to control the rotating shaft 4200 to rotate to the expected position.

[0447] 38 , in some examples, the distance between the sensing component 4400 and the magnetic member 4300 is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0448] In this way, by setting the distance between the sensing component 4400 and the magnetic part 4300 to be greater than or equal to 0.2 mm and less than or equal to 1 mm, the sensing component 4400 can accurately and stably sense the magnetic field, thereby facilitating the sensing component 4400 to accurately and stably detect the moving position of the rotating shaft 4200, so that the electric toothbrush can accurately and stably control the rotating shaft 4200 to rotate to the expected position, preventing the sensing component from interfering with other structures due to the close distance, and at the same time meeting safety requirements, and preventing the signal from being weak due to the distance being too far, thereby avoiding the function of the sensing component 4400 to identify the magnetic part 4300 from being destroyed.

[0449] In some embodiments, if the distance between the sensing component 4400 and the magnetic part 4300 is too large, for example, the distance between the sensing component 4400 and the magnetic part 4300 is greater than 1 mm, the sensing component 4400 will not be able to sense the magnetic field of the magnetic part 4300 due to the large distance between the sensing component 4400 and the magnetic part 4300, thereby affecting the sensing component 4400 to detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic part 4300.

[0450] Referring to Figure 38, in some embodiments, the electric toothbrush may further include a motor housing 4500, a stator 4100, a rotating shaft 4200 and a magnetic component 4300 are arranged in the motor housing 4500, and the electric toothbrush may further include a circuit board 4600, the circuit board 4600 is arranged in the motor housing 4500, the induction component 4400 is arranged on the circuit board 4600, and the circuit board 4600 is provided with an avoidance hole, which is used to avoid the rotating shaft 4200.

[0451] In this way, the electric toothbrush includes a motor housing 4500, and the stator 4100, the rotating shaft 4200 and the magnetic part 4300, as well as the induction component 4400 and the circuit board 4600 are all arranged in the motor housing 4500, which can improve the space utilization of the motor housing 4500, help reduce the volume of the electric toothbrush, and is arranged outside the motor housing 4500 relative to the circuit board 4600, avoids the introduction of other external structures, prevents the increase in the overall length of the toothbrush, and further helps to achieve a miniaturized design of the electric toothbrush; at the same time, an avoidance hole is provided on the circuit board 4600, so that the rotating shaft 4200 can be passed through the avoidance hole of the circuit board 4600, so that the rotating shaft 4200 can rotate relative to the circuit board 4600 without the circuit board 4600 interfering with its rotation, further making the layout between the various structures arranged in the motor housing 4500 more compact, improving the space utilization of the motor housing 4500, and further reducing the volume of the motor.

[0452] 38 , in some embodiments, the circuit board 4600 can be disposed within the motor housing 4500 , and the circuit board 4600 can be connected to the inner wall of the motor housing 4500 , or the circuit board 4600 can be connected to the housing while also being rotatably connected to the rotating shaft 4200 .

[0453] In some embodiments, the sensing component 4400 can be electrically connected to the circuit board 4600, or the sensing component 4400 can be directly installed on the circuit board 4600, and the sensing component 4400 can be installed on the side of the circuit board 4600 facing the magnetic part 4300, so that the sensing component 4400 can sense the magnetic field of the magnetic part 4300.

[0454] 38 , if the sensing assembly 4400 is directly mounted on the circuit board 4600, the rotating shaft 4200 can rotate relative to the sensing assembly 4400 and the circuit board 4600 to prevent the sensing assembly 4400 and the rotating shaft 4200 from rotating simultaneously. Furthermore, when the axial drive mechanism 4900 drives the rotating shaft 4200 to move axially, the circuit board 4600 can simultaneously move axially, causing the sensing assembly 4400 mounted on the circuit board 4600 to move axially simultaneously, thereby maintaining a relatively constant distance between the sensing assembly 4400 and the magnetic member 4300.

[0455] Referring to Figure 38, in one possible implementation, the electric toothbrush may include a driving structure, which is connected to the sensing component 4400. When the axial driving mechanism 4900 drives the magnetic component 4300 to move axially, the driving structure drives the sensing component 4400 to move axially at the same time, so that the distance between the sensing component 4400 and the magnetic component 4300 remains relatively unchanged.

[0456] In this way, the electric toothbrush is provided with a driving structure so that the driving structure is connected to the sensing component 4400, and when the axial driving mechanism 4900 drives the magnetic part 4300 to move axially, the driving structure also drives the sensing component 4400 to move axially at the same time, so that the distance between the sensing component 4400 and the magnetic part 4300 remains relatively unchanged, which can improve the stability of the magnetic field of the magnetic part 4300 sensed by the sensing component 4400, and can improve the detection stability of the moving position of the rotating shaft 4200 detected by the sensing component 4400 through the magnetic field of the magnetic part 4300, thereby improving the working stability of the electric toothbrush controlling the rotating shaft 4200 to rotate to the expected position.

[0457] In some embodiments, the driving structure may be a linear motor that can drive the sensing assembly 4400 to move axially along the rotating shaft 4200. Alternatively, the driving structure may be a telescopic rod structure that can also drive the sensing assembly 4400 to move axially along the rotating shaft 4200.

[0458] In one possible implementation, the electric toothbrush may further include a circuit board 4600 , the sensing component 4400 is arranged on the circuit board 4600 , the driving structure drives the circuit board 4600 to move axially along the rotating shaft 4200 , and the circuit board 4600 drives the sensing component 4400 to move axially along the rotating shaft 4200 .

[0459] With such an arrangement, the circuit board 4600 can realize the circuit control of the electric toothbrush. The sensing component 4400 is arranged on the circuit board 4600, so that the sensing component 4400 and the circuit board 4600 are more integrated, which is conducive to reducing space and reducing the volume of the electric toothbrush. At the same time, it ensures that the structure for realizing the electric toothbrush detection shaft 4200 position function and the electric toothbrush control shaft 4200 precise rotation function is more centralized, which is conducive to the electric toothbrush to realize detection and maintenance in one position, thereby optimizing the design.

[0460] 38 , in some embodiments, an electric toothbrush may include an elastic member 4800 disposed on a rotating shaft 4200. The rotating shaft 4200 is capable of rotating relative to the elastic member 4800, thereby driving at least a portion of the elastic member 4800 to move axially. When the axial drive mechanism 4900 drives the rotating shaft 4200 and the magnetic member 4300 to move axially together, the rotating shaft 4200 drives at least a portion of the elastic member 4800 to reciprocate between a first position and a second position. The sensing assembly 4400 is disposed at the deformed position of the elastic member 4800, so that the sensing assembly 4400 and the elastic member 4800 move together, thereby maintaining a relatively constant distance between the sensing assembly 4400 and the magnetic member 4300.

[0461] With this configuration, the electric toothbrush can include an elastic member 4800, which is disposed on the rotating shaft 4200. The rotating shaft 4200 can move axially with the rotating shaft 4200 but does not rotate with the rotating shaft 4200. When the axial drive mechanism 4900 drives the rotating shaft 4200 and the magnetic member 4300 to move axially together, the rotating shaft 4200 causes at least a portion of the elastic member 4800 to deform back and forth between a first position and a second position. The sensing assembly 4400 is disposed at the deformed position of the elastic member 4800, so that the sensing assembly 4400 and the elastic member 4800 move together, keeping the distance between the sensing assembly 4400 and the magnetic member 4300 relatively constant. This improves the stability of the magnetic field sensed by the sensing assembly 4400 against the magnetic member 4300, and improves the stability of the sensing assembly 4400 in detecting the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic member 4300. This improves the stability of the electric toothbrush's control of the rotating shaft 4200 to rotate to a desired position.

[0462] It can be understood that if the electric toothbrush has a motor housing 4500, the elastic member 4800 can be arranged in the motor housing 4500, at least a portion of the elastic member 4800 can be fixedly connected to the motor housing 4500, and another portion of the elastic member 4800 can move in the axial direction, so that when the rotating shaft 4200 drives the elastic member 4800 to move axially, the elastic member 4800 drives the induction component 4400 to move axially.

[0463] Referring to Figure 38, it can be understood that the elastic member 4800 in Figure 38 can be the initial position of the rotating shaft 4200 during axial movement. Along the axial direction of the rotating shaft 4200, the first position can be located at one end of the elastic member 4800 facing the magnetic member 4300, and the second position can be located on the side of the elastic member 4800 facing the axial drive mechanism 4900. The rotating shaft 4200 can reciprocate between the first position and the second position under the drive of the axial drive mechanism 4900.

[0464] When the sensing component 4400 reciprocates between the first position and the second position with the elastic part 4800, it will not fall off the elastic part 4800, thereby preventing the sensing component 4400 from being unable to sense the magnetic field of the magnetic part 4300. The sensing component 4400 can be set on the elastic part 4800 by gluing, or the sensing component 4400 can be connected to the elastic part 4800 by connecting parts such as screws.

[0465] Referring to Figure 38, in some embodiments, the elastic member 4800 can be a rubber shock absorber with elastic deformation capability, and the rubber shock absorber is arranged between the motor housing 4500 and the rotating shaft 4200. The side of the rubber shock absorber facing away from the rotating shaft 4200 can be fixedly connected to the inner wall of the motor housing 4500, and the side of the rubber shock absorber facing away from the motor housing 4500 can be rotatably connected to the rotating shaft 4200. The rotating shaft 4200 can rotate relative to the rubber shock absorber. The area on the rubber shock absorber located between the motor housing 4500 and the rotating shaft 4200 can have a deformation position, and the sensing component 4400 is arranged at the deformation position of the rubber shock absorber.

[0466] When the axial drive mechanism 4900 drives the rotating shaft 4200 to rotate, the rotating shaft 4200 can drive the deformation position on the rubber shock absorber to reciprocate between the first position and the second position, and drive the sensing component 4400 and the elastic component 4800 set at the deformation position to move together, so that the distance between the sensing component 4400 and the magnetic component 4300 remains relatively unchanged.

[0467] Furthermore, by setting the elastic part 4800 as a rubber shock-absorbing part, the vibration transmitted to the motor housing 4500 during the movement of the rotating shaft 4200 can be reduced, thereby reducing the vibration transmitted to the user when the electric toothbrush is working, thereby improving the practicality of the electric toothbrush and improving the user's experience.

[0468] Referring to Figure 39, in some embodiments, the electric toothbrush may further include a bearing 4810, which is arranged on the elastic member 4800 and sleeved on the rotating shaft 4200. The rotating shaft 4200 can rotate relative to the elastic member 4800 through the bearing 4810, and drive the elastic member 4800 to deform axially through the bearing 4810.

[0469] With such a configuration, the electric toothbrush can include a bearing 4810, which is sleeved on the rotating shaft 4200, so that the rotating shaft 4200 can rotate relative to the elastic member 4800 through the rotating shaft 4200, thereby preventing the elastic member 4800 from rotating with the rotating shaft 4200, and allowing the rotating shaft 4200 to drive the elastic member 4800 to deform axially through the bearing 4810.

[0470] In some embodiments, the sensing component 4400 is rotatably connected to the rotating shaft 4200 , and the rotating shaft 4200 can rotate relative to the sensing component 4400 and drive the sensing component 4400 to move along the axial direction, so that the distance between the sensing component 4400 and the magnetic component 4300 remains unchanged.

[0471] In this way, the sensing component 4400 is directly connected to the rotating shaft 4200 for rotation, so that the rotating shaft 4200 can rotate relative to the sensing component 4400, that is, the rotation will not drive the sensing component 4400 to rotate, but the rotating shaft 4200 will drive the sensing component 4400 to move in the axial direction, so that the distance between the sensing component 4400 and the magnetic component 4300 remains unchanged, thereby realizing the dual freedom of circumferential rotation and axial movement of the electric toothbrush, and the circumferential precise control function of the rotating shaft 4200 of the electric toothbrush will not be destroyed. At the same time, it also simplifies the internal structure of the electric toothbrush and can save the manufacturing cost of the electric toothbrush.

[0472] In some embodiments, if the electric toothbrush has a motor housing 4500, one end of the sensing component 4400 can be rotatably connected to the rotating shaft 4200, and the motor housing 4500 has a limiting slide extending axially along the rotating shaft 4200. The other end of the sensing component 4400 can be slidably connected to the limiting slide through a connecting piece so that when the rotating shaft 4200 rotates, the sensing component 4400 does not rotate with the rotating shaft 4200, and the rotating shaft 4200 can drive the sensing component 4400 to move axially.

[0473] Example 3 of this solution

[0474] 38 and 39 , an embodiment of the present application further provides an electric toothbrush, which may include a stator 4100, a rotating shaft 4200, a magnetic component 4300, an axial drive mechanism 4900 and a sensing component 4400. The magnetic component 4300 is arranged on the rotating shaft 4200, and the sensing component 4400 is spaced apart from the magnetic component 4300. The stator 4100 can drive the rotating shaft 4200 and the magnetic component 4300 to rotate together around the axial direction of the rotating shaft 4200, and the axial drive mechanism 4900 can drive the rotating shaft 4200 and the magnetic component 4300 to move together along the axial direction.

[0475] When the axial drive mechanism 4900 drives the rotating shaft 4200 and the magnetic member 4300 to move in the axial direction, the sensing component 4400 also moves in the axial direction, so that the distance between the sensing component 4400 and the magnetic member 4300 remains relatively unchanged.

[0476] The sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic member 4300, so that the electric toothbrush controls the rotating shaft 4200 to rotate to a desired position.

[0477] 39 , in some embodiments, the stator 4100 can be driven to rotate by other magnetic structures disposed on the rotating shaft 4200, thereby driving the rotating shaft 4200 to rotate. Furthermore, the magnetic member 4300 serves to enable the sensing assembly 4400 to detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic member 4300.

[0478] The present application also provides an electric toothbrush, wherein a stator 4100 can drive a rotating shaft 4200 and a magnetic member 4300 to rotate together in the axial direction of the rotating shaft 4200, and an axial drive mechanism 4900 can drive the rotating shaft 4200 and the magnetic member 4300 to move together in the axial direction, so that the rotating shaft 4200 of the electric toothbrush has dual degrees of freedom of motion: circumferential swing and axial movement. The dual degrees of freedom enable the electric toothbrush to better clean and expand the cleaning area when brushing teeth, which is generally beneficial to improving the cleaning effect of the electric toothbrush.

[0479] When the rotating shaft 4200 and the magnetic part 4300 of the electric toothbrush move in the axial direction, the sensing component 4400 moves in the axial direction at the same time, and the distance between the sensing component 4400 and the magnetic part 4300 remains basically unchanged. This avoids the failure of the sensing component 4400 to detect the magnetic part 4300 due to the change in the distance between the sensing component 4400 and the magnetic part 4300 when the magnetic part 4300 moves axially, further ensuring that the electric toothbrush's function of accurately controlling the rotating shaft 4200 is not destroyed, which is beneficial to improving the functional stability of the electric toothbrush and thus facilitating the use of the electric toothbrush; of course, in this solution, the sensing component 4400 senses the magnetic field of the magnetic part 4300, which can also be the magnetic field strength, the change of the magnetic pole of the magnetic field, or other information of the magnetic field.

[0480] It should be noted that when the sensing component 4400 moves in the axial direction at the same time, the distance between the sensing component 4400 and the magnetic part 4300 remains basically unchanged. It can be understood that during the movement, a certain error is allowed to exist in the distance between the sensing component 4400 and the magnetic part 4300, and the error range is appropriate not to affect the magnetic field of the magnetic part 4300 sensed by the sensing component 4400.

[0481] It should be noted that the magnetic component 4300 in this solution can be detected as the sensing component 4400. There is no restriction on whether the magnetic component 4300 can be driven by the stator 4100. That is, the magnetic component 4300 can be driven by the stator 4100; or it can not be driven by the stator 4100, but the stator 4100 drives the rotor through other magnetic components.

[0482] Referring to Figure 39, in a possible implementation, the electric toothbrush may further include a magnetic structure 4210 for driving the rotating shaft 4200 to rotate. The magnetic structure 4210 can be arranged on the outer periphery of the rotating shaft 4200, and is arranged at a radial interval with the stator 4100 on the rotating shaft 4200. The stator 4100 drives the magnetic structure 4210 to rotate, and causes the magnetic structure 4210 to drive the rotating shaft 4200 to rotate. The magnetic member 4300 may be a magnetic ring 4300b, which is sleeved on the rotating shaft 4200. The induction component 4400 is spaced apart relative to the magnetic ring 4300b. When the magnetic structure 4210 drives the rotating shaft 4200 to rotate, the rotating shaft 4200 can drive the magnetic ring 4300b to rotate.

[0483] In this way, by setting the magnetic part 4300 as a magnetic ring 4300b, and the magnetic ring 4300b is sleeved on the outer periphery of the rotating shaft 4200, the magnetic ring 4300b and the sensing component 4400 are spaced apart, and the stator 4100 drives the rotating shaft 4200 to rotate by driving other magnetic components. The stator 4100 does not directly drive the magnetic ring 4300b to rotate. On the contrary, it is the rotation of the rotating shaft 4200 that drives the magnetic ring 4300b to rotate. That is, the magnetic ring 4300b can only be detected by the sensing component 4400 and is not part of the transmission structure. This solution only needs to add the magnetic ring 4300b, and there is no need to consider the design complexity brought by the multiple functions of the components, which is conducive to the rapid design and implementation of the electric toothbrush solution.

[0484] 39 , in some embodiments, the induction component 4400 can be spaced apart from the magnetic component 4300 in the axial direction of the rotating shaft 4200 .

[0485] In this way, by setting the sensing component 4400 at a distance from the magnetic component 4300 in the axial direction of the rotating shaft 4200, the sensing component 4400 and the magnetic component 4300 can be arranged at a distance in the axial direction of the rotating shaft 4200, which is beneficial to reducing the volume of the electric toothbrush and obtaining an electric toothbrush with a relatively smaller width. In addition, by setting the sensing component 4400 relatively in the axial direction, the interference of the sensing component 4400 on the radial structure of the electric toothbrush is reduced, such as reducing the interference with the stator 4100, which is more beneficial to the structural design of the electric toothbrush.

[0486] In some embodiments, if the sensing component 4400 can be spaced apart from the magnetic component 4300 in the axial direction, the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic component 4300 toward one end of the sensing component 4400 .

[0487] 40 , in some embodiments, the magnetic member 4300 extends continuously along the circumference of the rotating shaft 4200 and covers the rotating shaft 4200. The magnetic member 4300 can completely cover the outer side of the rotating shaft 4200, and the sidewall of the magnetic member 4300 is continuous and closed. The axial view of the magnetic member 4300 can be an annular structure as shown in FIG40 . It is understood that the magnetic member 4300 can be a closed annular structure.

[0488] With such arrangement, the magnetic part 4300 completely covers the rotating shaft 4200 in the circumferential direction, so that when the stator 4100 drives the magnetic part 4300 to rotate, the magnetic part 4300 can be better subjected to force in the circumferential direction, and the stator 4100 can further better drive the magnetic part 4300 to rotate. At the same time, the magnetic part 4300 can better drive the rotating shaft 4200 to rotate, which is beneficial to improving the transmission stability of the electric toothbrush transmission structure; the combined effect makes the magnetic part 4300 have a better transmission function and the magnetic part 4300 can be detected.

[0489] 41 , in some embodiments, the magnetic member 4300 may include at least one pair of n-pole and s-pole, and the n-pole and s-pole are disposed adjacent to each other on an end surface of one end of the magnetic member 4300 .

[0490] In this arrangement, the magnetic part 4300 can include at least one pair of n-pole and s-pole, and the n-pole and s-pole are arranged adjacent to each other in sequence on the end face of one end of the magnetic part 4300, so that the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of at least one pair of n-pole and s-pole, so that the electric toothbrush controls the rotating shaft 4200 to rotate to the expected position.

[0491] Referring to Figure 41, in a specific implementation, the magnetic component 4300 can have a pair of n-pole and s-pole, and the n-pole and s-pole are arranged adjacent to each other. If the magnetic component 4300 is a magnetic ring 4300b, the end face of the magnetic ring 4300b facing the sensing component 4400 can have a pair of n-pole and s-pole. The sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the magnetic field of the n-pole and s-pole on the magnetic component 4300.

[0492] Referring to Figure 42, in an exemplary embodiment, the magnetic member 4300 can also have two pairs of n poles and s poles, and the n poles and s poles are arranged adjacent to each other in sequence. If the magnetic member 4300 is a magnetic ring 4300b, the end surface of the magnetic ring 4300b facing the sensing component 4400 can have two pairs of n poles and s poles, and the two pairs of n poles and s poles are alternately arranged in an order of n pole-s pole-n pole-s pole on the end surface of the magnetic ring 4300b facing the sensing component 4400. The sensing component 4400 detects the moving position of the rotating shaft 4200 by sensing the magnetic fields of the two pairs of n poles and s poles.

[0493] 41 , in some embodiments, the induction component 4400 is spaced apart from the magnetic component 4300 in the radial direction of the rotating shaft 4200 .

[0494] In this way, by spacing the sensing component 4400 and the magnetic component 4300 in the radial direction of the rotating shaft 4200, the sensing component 4400 and the magnetic component 4300 can be spaced apart in the radial direction of the rotating shaft 4200, thereby reducing the space occupancy rate of the sensing component 4400 and the magnetic component 4300 in the axial direction of the rotating shaft 4200, thereby shortening the length of the electric toothbrush in the axial direction of the rotating shaft 4200.

[0495] In one example, if the magnetic member 4300 includes a pair of n-pole and s-pole, and the n-pole and s-pole are adjacent to each other on the circumferential surface of the magnetic member 4300 facing the sensing component 4400, the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the pair of n-pole and s-pole on the circumferential surface of the magnetic member 4300.

[0496] In another example, if the magnetic member 4300 includes two pairs of n poles and s poles, the two pairs of n poles and s poles are adjacent to each other on the circumferential surface of the magnetic member 4300 facing the sensing component 4400, and the n pole-s pole-n pole-s pole are alternately arranged on the axial surface of the magnetic member 4300, then the sensing component 4400 can detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the two pairs of n poles and s poles on the circumferential surface of the magnetic member 4300.

[0497] 39 and 41 , in one possible implementation, the sensing component 4400 may include a Hall sensor, which detects the moving position of the rotating shaft 4200 through the magnetic field strength of the magnetic member 4300 .

[0498] With such a configuration, the sensing component 4400 uses the Hall sensor, thereby enabling the Hall sensor to detect the moving position of the rotating shaft 4200 by sensing the magnetic field strength of the magnetic member 4300, and allowing the electric toothbrush to control the rotating shaft 4200 to rotate to the expected position.

[0499] In some examples, if the magnetic member 4300 is a magnetic column, the magnetic column and the sensing component 4400 are spaced apart in the axial direction of the rotating shaft 4200, and the end of the magnetic column facing the sensing component 4400 has a pair of n poles and s poles, then the sensing component 4400 can be a Hall sensor, and the number of Hall sensors can be two, and the two Hall sensors are spaced apart in the circumferential direction of the rotating shaft 4200.

[0500] In a specific implementation, the two Hall sensors can be a first Hall sensor and a second Hall sensor, which are spaced apart and electrically controlled to detect induced voltages in different ranges. For example, the first Hall sensor has an induced voltage range of 0V-2.5V, while the second Hall sensor has an induced voltage range of 2.5V-5V. When the magnetic member 4300 drives the rotating shaft 4200 to swing back and forth axially, the first Hall sensor can generate a voltage value within 0V-2.5V, and the second Hall sensor can generate another voltage value within 2.5V-5V, thereby achieving accurate detection of the position of the magnetic member 4300.

[0501] In a possible implementation, the sensing component 4400 may include a magnetic encoder, which detects the moving position of the rotating shaft 4200 through the magnetic pole arrangement of the magnetic member 4300 .

[0502] With such a configuration, the sensing component 4400 passes through the magnetic encoder, thereby enabling the magnetic encoder to detect the moving position of the rotating shaft 4200 through the magnetic pole arrangement of the magnetic member 4300, and enables the electric toothbrush to control the rotating shaft 4200 to rotate to the expected position.

[0503] In a possible implementation, the sensing component 4400 may include an inductive sensor, which detects the moving position of the rotating shaft 4200 through changes in the magnetic field caused by the rotation of the magnetic member 4300 .

[0504] With such a configuration, the sensing component 4400 may include an inductive sensor, so that the inductive sensor can detect the moving position of the rotating shaft 4200 through the change in the magnetic field caused by the rotation of the magnetic member 4300, and enable the electric toothbrush to control the rotating shaft 4200 to rotate to the expected position.

[0505] 39 , in some examples, the distance between the sensing component 4400 and the magnetic member 4300 is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0506] In this way, by setting the distance between the sensing component 4400 and the magnetic part 4300 to be greater than or equal to 0.2 mm and less than or equal to 1 mm, the sensing component 4400 can accurately and stably sense the magnetic field, thereby facilitating the sensing component 4400 to accurately and stably detect the moving position of the rotating shaft 4200, so that the electric toothbrush can accurately and stably control the rotating shaft 4200 to rotate to the expected position, preventing the sensing component from interfering with other structures due to the close distance, and at the same time meeting safety requirements, and preventing the signal from being weak due to the distance being too far, thereby avoiding the function of the sensing component 4400 to identify the magnetic part 4300 from being destroyed.

[0507] In some embodiments, if the distance between the sensing component 4400 and the magnetic part 4300 is too large, for example, the distance between the sensing component 4400 and the magnetic part 4300 is greater than 1 mm, the sensing component 4400 will not be able to sense the magnetic field of the magnetic part 4300 due to the large distance between the sensing component 4400 and the magnetic part 4300, thereby affecting the sensing component 4400 to detect the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic part 4300.

[0508] Referring to Figure 39, in some embodiments, the electric toothbrush may further include a motor housing 4500, a stator 4100, a rotating shaft 4200 and a magnetic component 4300 are arranged in the motor housing 4500, and the electric toothbrush may further include a circuit board 4600, the circuit board 4600 is arranged in the motor housing 4500, the induction component 4400 is arranged on the circuit board 4600, and the circuit board 4600 is provided with an avoidance hole, which is used to avoid the rotating shaft 4200.

[0509] In this way, the electric toothbrush includes a motor housing 4500, and the stator 4100, the rotating shaft 4200 and the magnetic part 4300, as well as the induction component 4400 and the circuit board 4600 are all arranged in the motor housing 4500, which can improve the space utilization of the motor housing 4500, help reduce the volume of the electric toothbrush, and is arranged outside the motor housing 4500 relative to the circuit board 4600, avoids the introduction of other external structures, prevents the increase in the overall length of the toothbrush, and further helps to achieve a miniaturized design of the electric toothbrush; at the same time, an avoidance hole is provided on the circuit board 4600, so that the rotating shaft 4200 can be passed through the avoidance hole of the circuit board 4600, so that the rotating shaft 4200 can rotate relative to the circuit board 4600 without the circuit board 4600 interfering with its rotation, further making the layout between the various structures arranged in the motor housing 4500 more compact, improving the space utilization of the motor housing 4500, and further reducing the volume of the motor.

[0510] In some embodiments, the circuit board 4600 can be disposed in the motor housing 4500 , and the circuit board 4600 can be connected to the inner wall of the motor housing 4500 , or the circuit board 4600 can be connected to the housing and rotatably connected to the rotating shaft 4200 .

[0511] In some embodiments, the sensing component 4400 can be electrically connected to the circuit board 4600, or the sensing component 4400 can be directly installed on the circuit board 4600, and the sensing component 4400 can be installed on the side of the circuit board 4600 facing the magnetic part 4300, so that the sensing component 4400 can sense the magnetic field of the magnetic part 4300.

[0512] If the sensing component 4400 is directly mounted on the circuit board 4600, the rotating shaft 4200 can rotate relative to the sensing component 4400 and the circuit board 4600 to prevent the sensing component 4400 and the rotating shaft 4200 from rotating simultaneously. Furthermore, when the axial drive mechanism 4900 drives the rotating shaft 4200 to move axially, the circuit board 4600 can simultaneously move axially, causing the sensing component 4400 mounted on the circuit board 4600 to move axially at the same time, thereby maintaining a relatively constant distance between the sensing component 4400 and the magnetic member 4300.

[0513] Referring to Figure 39, in one possible implementation, the electric toothbrush may include a driving structure (not shown in the figure), which is connected to the sensing component 4400. When the axial driving mechanism 4900 drives the magnetic part 4300 to move axially, the driving structure drives the sensing component 4400 to move axially at the same time, so that the distance between the sensing component 4400 and the magnetic part 4300 remains relatively unchanged.

[0514] In this way, the electric toothbrush is provided with a driving structure so that the driving structure is connected to the sensing component 4400, and when the axial driving mechanism 4900 drives the magnetic part 4300 to move axially, the driving structure also drives the sensing component 4400 to move axially at the same time, so that the distance between the sensing component 4400 and the magnetic part 4300 remains relatively unchanged, which can improve the stability of the magnetic field of the magnetic part 4300 sensed by the sensing component 4400, and can improve the detection stability of the moving position of the rotating shaft 4200 detected by the sensing component 4400 through the magnetic field of the magnetic part 4300, thereby improving the working stability of the electric toothbrush controlling the rotating shaft 4200 to rotate to the expected position.

[0515] In some embodiments, the driving structure may be a linear motor that can drive the sensing assembly 4400 to move axially along the rotating shaft 4200. Alternatively, the driving structure may be a telescopic rod structure that can also drive the sensing assembly 4400 to move axially along the rotating shaft 4200.

[0516] In one possible implementation, the electric toothbrush may further include a circuit board 4600 , the sensing component 4400 is arranged on the circuit board 4600 , the driving structure drives the circuit board 4600 to move axially along the rotating shaft 4200 , and the circuit board 4600 drives the sensing component 4400 to move axially along the rotating shaft 4200 .

[0517] With such an arrangement, the circuit board 4600 can realize the circuit control of the electric toothbrush. The sensing component 4400 is arranged on the circuit board 4600, so that the sensing component 4400 and the circuit board 4600 are more integrated, which is conducive to reducing space and reducing the volume of the electric toothbrush. At the same time, it ensures that the structure for realizing the electric toothbrush detection shaft 4200 position function and the electric toothbrush control shaft 4200 precise rotation function is more centralized, which is conducive to the electric toothbrush to realize detection and maintenance in one position, thereby optimizing the design.

[0518] 39 , in some embodiments, an electric toothbrush may include an elastic member 4800 disposed on a rotating shaft 4200. The rotating shaft 4200 is capable of rotating relative to the elastic member 4800, thereby driving at least a portion of the elastic member 4800 to move axially. When the axial drive mechanism 4900 drives the rotating shaft 4200 and the magnetic member 4300 to move axially together, the rotating shaft 4200 drives at least a portion of the elastic member 4800 to reciprocate between a first position and a second position. The sensing assembly 4400 is disposed at the deformed position of the elastic member 4800, so that the sensing assembly 4400 and the elastic member 4800 move together, thereby maintaining a relatively constant distance between the sensing assembly 4400 and the magnetic member 4300.

[0519] With this configuration, the electric toothbrush can include an elastic member 4800, which is disposed on the rotating shaft 4200. The rotating shaft 4200 can move axially with the rotating shaft 4200 but does not rotate with the rotating shaft 4200. When the axial drive mechanism 4900 drives the rotating shaft 4200 and the magnetic member 4300 to move axially together, the rotating shaft 4200 causes at least a portion of the elastic member 4800 to deform back and forth between a first position and a second position. The sensing assembly 4400 is disposed at the deformed position of the elastic member 4800, so that the sensing assembly 4400 and the elastic member 4800 move together, keeping the distance between the sensing assembly 4400 and the magnetic member 4300 relatively constant. This improves the stability of the magnetic field sensed by the sensing assembly 4400 against the magnetic member 4300, and improves the stability of the sensing assembly 4400 in detecting the moving position of the rotating shaft 4200 by sensing the magnetic field of the magnetic member 4300. This improves the stability of the electric toothbrush's control of the rotating shaft 4200 to rotate to a desired position.

[0520] It can be understood that if the electric toothbrush has a motor housing 4500, the elastic member 4800 can be arranged in the motor housing 4500, at least a portion of the elastic member 4800 can be fixedly connected to the motor housing 4500, and another portion of the elastic member 4800 can move in the axial direction, so that when the rotating shaft 4200 drives the elastic member 4800 to move axially, the elastic member 4800 drives the induction component 4400 to move axially.

[0521] Referring to Figure 39, it can be understood that the elastic member 4800 in Figure 39 can be the initial position of the rotating shaft 4200 during axial movement. Along the axial direction of the rotating shaft 4200, the first position can be located at one end of the elastic member 4800 facing the magnetic member 4300, and the second position can be located on the side of the elastic member 4800 facing the axial drive mechanism 4900. The rotating shaft 4200 can reciprocate between the first position and the second position under the drive of the axial drive mechanism 4900.

[0522] When the sensing component 4400 reciprocates between the first position and the second position with the elastic part 4800, it will not fall off the elastic part 4800, thereby preventing the sensing component 4400 from being unable to sense the magnetic field of the magnetic part 4300. The sensing component 4400 can be set on the elastic part 4800 by gluing, or the sensing component 4400 can be connected to the elastic part 4800 by connecting parts such as screws.

[0523] Referring to Figure 39, in some embodiments, the elastic member 4800 can be a rubber shock absorber with elastic deformation capability, and the rubber shock absorber is arranged between the motor housing 4500 and the rotating shaft 4200. The side of the rubber shock absorber facing away from the rotating shaft 4200 can be fixedly connected to the inner wall of the motor housing 4500, and the side of the rubber shock absorber facing away from the motor housing 4500 can be rotatably connected to the rotating shaft 4200. The rotating shaft 4200 can rotate relative to the rubber shock absorber. The area on the rubber shock absorber located between the motor housing 4500 and the rotating shaft 4200 can have a deformation position, and the sensing component 4400 is arranged at the deformation position of the rubber shock absorber.

[0524] When the axial drive mechanism 4900 drives the rotating shaft 4200 to rotate, the rotating shaft 4200 can drive the deformation position on the rubber shock absorber to reciprocate between the first position and the second position, and drive the sensing component 4400 and the elastic component 4800 set at the deformation position to move together, so that the distance between the sensing component 4400 and the magnetic component 4300 remains relatively unchanged.

[0525] In some embodiments, the distance between the first position and the second position is the axial movement distance of the rotating shaft 4200 .

[0526] Furthermore, by setting the elastic part 4800 as a rubber shock-absorbing part, the vibration transmitted to the motor housing 4500 during the movement of the rotating shaft 4200 can be reduced, thereby reducing the vibration transmitted to the user when the electric toothbrush is working, thereby improving the practicality of the electric toothbrush and improving the user's experience.

[0527] Referring to Figure 39, in some embodiments, the electric toothbrush may further include a bearing 4810, which is arranged on the elastic member 4800 and sleeved on the rotating shaft 4200. The rotating shaft 4200 can rotate relative to the elastic member 4800 through the bearing 4810, and drive the elastic member 4800 to deform axially through the bearing 4810.

[0528] With such a configuration, the electric toothbrush can include a bearing 4810, which is sleeved on the rotating shaft 4200, so that the rotating shaft 4200 can rotate relative to the elastic member 4800 through the rotating shaft 4200, thereby preventing the elastic member 4800 from rotating with the rotating shaft 4200, and allowing the rotating shaft 4200 to drive the elastic member 4800 to deform axially through the bearing 4810.

[0529] In some embodiments, the sensing component 4400 is rotatably connected to the rotating shaft 4200 , and the rotating shaft 4200 can rotate relative to the sensing component 4400 and drive the sensing component 4400 to move along the axial direction, so that the distance between the sensing component 4400 and the magnetic component 4300 remains unchanged.

[0530] In this way, the sensing component 4400 is directly connected to the rotating shaft 4200 for rotation, so that the rotating shaft 4200 can rotate relative to the sensing component 4400, that is, the rotation will not drive the sensing component 4400 to rotate, but the rotating shaft 4200 will drive the sensing component 4400 to move in the axial direction, so that the distance between the sensing component 4400 and the magnetic component 4300 remains unchanged, thereby realizing the dual freedom of circumferential rotation and axial movement of the electric toothbrush, and the circumferential precise control function of the rotating shaft 4200 of the electric toothbrush will not be destroyed. At the same time, it also simplifies the internal structure of the electric toothbrush and can save the manufacturing cost of the electric toothbrush.

[0531] In some embodiments, if the electric toothbrush has a motor housing 4500, one end of the sensing component 4400 can be rotatably connected to the rotating shaft 4200, and the motor housing 4500 has a limiting slide extending axially along the rotating shaft 4200. The other end of the sensing component 4400 can be slidably connected to the limiting slide through a connecting piece so that when the rotating shaft 4200 rotates, the sensing component 4400 does not rotate with the rotating shaft 4200, and the rotating shaft 4200 can drive the sensing component 4400 to move axially.

[0532] To improve tooth cleaning, some electric toothbrush heads are capable of axial movement. To achieve this, an elastic member is required within the electric toothbrush motor to assist in axial movement of the motor shaft, thereby reducing motor vibration and ensuring stable movement. However, existing elastic members are complex in structure and have poor vibration reduction, i.e., poor stabilization, resulting in a poor user experience. To address this issue, the present application further provides an elastic member. See Figures 43 to 53 for a description of this solution.

[0533] An elastic member of this embodiment, please refer to Figures 43 to 48, the above-mentioned motor shaft bearing is the bearing 554, the motor shaft 552 is the motor output shaft, and the motor housing is the housing 551. The elastic member includes an inner connecting sleeve 530, an outer connecting sleeve 510 and a flexible connecting portion 520 arranged coaxially, and the inner connecting sleeve 530, the outer connecting sleeve 510 and the flexible connecting portion 520 can be integrally formed by processing. The inner connecting sleeve 530 has an axially through-hole, and a mounting position for mounting the bearing 554 is provided in the center hole. The bearing 554 is coaxially arranged in the mounting position with the center hole. The bearing 554 is outer-circuited on the motor shaft 552 and can move axially forward and backward with the motor shaft 552. The outer connecting sleeve 510 is located on the periphery of the inner connecting sleeve 530, and the outer wall of the outer connecting sleeve 510 is connected to the inner wall of the housing 551 of the motor 550. Specifically, the outer wall of the external connecting sleeve 510 is pressed against the inner wall of the shell 551 of the motor 550. The inner wall of the shell 551 of the motor 550 is provided with axial limiting protrusions 559 at axial intervals. The two axial limiting protrusions 559 are axially spaced apart. The end faces of the external connecting sleeve 510 are respectively pressed against the opposite end faces of the two axial limiting protrusions 559, pressing the external connecting sleeve 510 axially.

[0534] The flexible connection portion 520 is connected between the inner connecting sleeve 530 and the outer connecting sleeve 510. The flexible connection portion 520 is elastic and capable of elastic deformation. By providing the flexible connection portion 520 between the inner connecting sleeve 530 and the outer connecting sleeve 510, the overall structure is simplified. The flexible connection portion 520 is capable of elastic deformation. When the bearing 554 is positioned, the flexible connection portion 520 allows the inner connecting sleeve 530 and the bearing 554 to jointly axially displace relative to the outer connecting sleeve 510. This elastic member assists the motor shaft 552 in axial forward and backward movement, thereby reducing motor vibration and stabilizing the axial forward and backward movement of the motor shaft.

[0535] Exemplarily, the inner connecting sleeve 530 and the outer connecting sleeve 510 are both cylindrical, and the flexible connecting portion 520 is made of rubber. The material of the flexible connecting portion 520 is not limited herein. The flexible connecting portion 520 is capable of elastic deformation, so that relative displacement can occur between the inner connecting sleeve 530 and the outer connecting sleeve 510 at least along the axial direction of the inner connecting sleeve 530. In another embodiment, relative displacement can occur between the inner connecting sleeve 530 and the outer connecting sleeve 510 along the axial direction and / or radial direction of the inner connecting sleeve 530. Exemplarily, the flexible connecting portion 520 is sheet-shaped to facilitate deformation, which can better assist the motor shaft 552 in axial movement, thereby facilitating vibration reduction and stabilizing movement.

[0536] This embodiment provides a simple overall structure by disposing a flexible connection portion 520 between the inner connection sleeve 530 and the outer connection sleeve 510. The flexible connection portion 520 is capable of elastic deformation, allowing relative displacement between the inner connection sleeve 530 and the outer connection sleeve 510, at least along the axial direction of the inner connection sleeve 530. This allows the inner connection sleeve 530 to swing over a large angle and move forward and backward axially along the bearing 554, assisting the motor shaft 552 in its forward and backward axial motion, thereby reducing vibration of the motor 550 and stabilizing its movement.

[0537] In one embodiment, as shown in Figures 43 to 48, the elastic member further includes a first connecting portion 522 and a second connecting portion 521. A radial gap is formed between the inner wall of the flexible connecting portion 520 and the outer wall of the inner connecting sleeve 530, and a radial gap is formed between the outer wall of the flexible connecting portion 520 and the inner wall of the outer connecting sleeve 510. The flexible connecting portion 520 is connected to the outer wall of the inner connecting sleeve 530 via the first connecting portion 522. Specifically, the first end of the first connecting portion 522 is connected to the outer wall of the inner connecting sleeve 530, and the second end is connected to the inner wall of the flexible connecting portion 520. The flexible connecting portion 520 is connected to the inner wall of the outer connecting sleeve 510 via the second connecting portion 521. Specifically, the flexible connecting portion 520 is an annular structure with a break at one point, and the opposite ends of the break are respectively connected to the two end surfaces of the second connecting portion 521 along the circumference of the flexible connecting portion 520. In another embodiment, the flexible connecting portion 520 is a complete annular structure. The first end of the second connection portion 521 is connected to the outer wall of the flexible connection portion 520, and the second end is connected to the inner wall of the outer connection sleeve 510. The radial gap provided between the flexible connection portion 520 and the inner connection sleeve 530 and the outer connection sleeve 510 prevents interference between the flexible connection portion 520, the inner connection sleeve 530, and the outer connection sleeve 510 during displacement, facilitating smooth relative displacement of the inner connection sleeve 530 relative to the outer connection sleeve 510 through the flexible connection portion 520, thereby improving the deformation reliability of the elastic member. The provision of the first connection portion 522 and the second connection portion 521 can improve the connection strength between the flexible connection portion 520, the inner connection sleeve 530, and the outer connection sleeve 510 while maintaining deformation reliability. In one embodiment, as shown in Figures 43 and 45, the first connection portion 522 and the second connection portion 521 are staggered along the circumference of the flexible connection portion 520, that is, the first connection portion 522 and the second connection portion 521 are not on the same straight line along the radial direction of the flexible connection portion 520. This can prevent the elastic member from being damaged and failing due to excessive force concentration caused by the first connection portion 522 and the second connection portion 521 being arranged in a straight line along the radial direction of the flexible connection portion 520, thereby improving the deformation capacity of the elastic member.

[0538] In one embodiment, as shown in Figures 43 and 45, the first connecting portions 522 are arranged in at least one pair relative to each other, and / or the second connecting portions 521 are arranged in at least one pair relative to each other. Specifically, the first connecting portions 522 are arranged in a pair along the radial direction of the flexible connecting portion 520 and are arranged on the same straight line, and the second connecting portions 521 are arranged in a pair along the radial direction of the flexible connecting portion 520 and are arranged on the same straight line. On the one hand, this can improve the connection strength between the outer connecting sleeve 510 and the inner connecting sleeve 530 and the flexible connecting portion 520, while on the other hand, it does not limit the overall deformation capacity of the flexible connecting portion 520. In another embodiment, the first connecting portions 522 can be multiple pairs, each pair being arranged in a corresponding straight line along the radial direction of the flexible connecting portion 520; the second connecting portions 521 can be multiple pairs, each pair being arranged in a corresponding straight line along the radial direction of the flexible connecting portion 520.

[0539] In one embodiment, as shown in Figures 44 to 48, the thickness of the second connection portion 521 at one end close to the outer connection sleeve 510 is greater than the thickness of the second connection portion 521 at one end close to the flexible connection portion 520. That is, the thickness of the second connection portion 521 along the axial direction of the flexible connection portion 520 gradually increases from the inside to the outside. Specifically, the thickness of the inner end of the second connection portion 521 along the axial direction of the flexible connection portion 520 is less than the thickness of the outer end. This is beneficial to strengthening the overall strength of the flexible connection portion 520 and the outer connection sleeve 510. At the same time, the thinner end is connected to the flexible connection portion 520, further facilitating the deformation of the flexible connection portion 520, improving the deformation capacity of the flexible connection portion, and improving the overall reliability of the elastic member. That is, it is convenient for the inner connection sleeve 530 and the outer connection sleeve 510 to produce relative displacement along the axial direction of the inner connection sleeve 530, thereby improving the overall vibration reduction effect of the elastic member.

[0540] In one embodiment, as shown in Figures 44 to 48 , of the two end surfaces of the second connection portion 521 along the axial direction of the flexible connection portion 520, one end surface has a greater degree of inclination than the other end surface. For example, both end surfaces of the second connection portion 521 along the axial direction of the flexible connection portion 520 may be inclined surfaces, with one end surface having a greater degree of inclination than the other end surface; or, of the two end surfaces of the second connection portion 521 along the axial direction of the flexible connection portion 520, one end surface is inclined, while the other is not, and the degree of inclination of the inclined surface is greater than that of the other end surface. The end surface with a greater degree of inclination can facilitate deformation of the flexible connection portion 520, improving the deformation capacity of the flexible connection portion 520, thereby facilitating relative displacement between the inner connection sleeve 530 and the outer connection sleeve 510 along the axial direction of the inner connection sleeve 530, thereby improving the overall vibration reduction effect of the elastic member. The front and rear ends of the motor shaft 552 in the housing 551 are supported on the inner wall of the housing 551 by a corresponding elastic member, and the end faces of the second connecting parts 521 of the two elastic members with relatively large inclinations are arranged opposite to each other. That is, the two end faces with relatively large inclinations are arranged opposite to each other. When the motor shaft 552 moves axially, one of the end faces with relatively large inclinations is more likely to deform, which can promote the axial movement of the corresponding bearing 554. The other end face with relatively large inclinations is not easy to deform, which prevents the corresponding bearing 554 from moving axially and has a rebound effect. The two end faces with relatively large inclinations produce elastic deformations with opposite forces, which can buffer the collision force and reduce rigid collision losses. At the same time, it can also better support and constrain the motor shaft 552 and prevent the motor shaft 552 from shaking significantly. At the same time, it can coordinate and stabilize the axial movement of the motor shaft 552, further improving the vibration reduction effect.

[0541] In one embodiment, as shown in FIG. 44 , the end surface of the second connection portion 521 with a relatively large axial inclination along the flexible connection portion 520 and the second hook 531 are disposed at the same end along the axial direction.

[0542] In one embodiment, at least a portion of the flexible connection portion 520 along the circumference is wavy. Specifically, a portion of the flexible connection portion 520 along the circumference is wavy, or the entire flexible connection portion 520 along the circumference is wavy. That is, at least a portion of the flexible connection portion 520 along the circumference has an undulating structure that rises and falls along the axial direction. In other words, at least a portion of the flexible connection portion 520 along the circumference has an undulating structure, with the undulations of the flexible connection portion 520 being axially oriented. This arrangement can improve the elasticity and elastic deformation capacity of the flexible connection portion 520, thereby enhancing the vibration damping effect of the elastic member.

[0543] In one embodiment, the flexible connection portion 520 includes an annular structure formed by a spring and / or a spring sheet. Specifically, the flexible connection portion 520 includes a spring and a spring sheet; or, the flexible connection portion 520 includes a spring or a spring sheet. That is, the flexible connection portion 520 may be composed entirely of a spring and a spring sheet, or may be composed partially of a spring and partially of a spring sheet. Exemplarily, the two ends of the spring or spring sheet are respectively connected to the adjacent first connection portion 522 and the second connection portion 521, and the first connection portion 522 and the second connection portion 521 are both elastic structures made of rubber. Exemplarily, the first end of the spring or spring sheet is connected to one side of the first connection portion 522 along the circumference of the flexible connection portion 520, and the second end is connected to one side of the second connection portion 521 along the circumference of the flexible connection portion 520. The ends of the spring or spring sheet can be provided on the side or inside of the first connection portion 522 and the second connection portion 521 along the circumference of the flexible connection portion 520 by injection molding.

[0544] In one embodiment, the flexible connection portion 520 includes springs spaced circumferentially. The springs are arranged radially along the flexible connection portion 520. The outer ends of the springs in the radial direction of the outer connection sleeve 510 are connected to the outer connection sleeve 510, and the inner ends in the radial direction of the outer connection sleeve 510 are connected to the inner connection sleeve 530. For example, there may be multiple springs, each spaced circumferentially, radially disposed between the outer connection sleeve 510 and the inner connection sleeve 530, with their ends connected to the inner wall of the outer connection sleeve 510 and the outer wall of the inner connection sleeve 530, respectively. This arrangement has a simple structure, enhances the deformation capability of the flexible connection portion 520, and improves the vibration reduction effect of the elastic member.

[0545] In one embodiment, the flexible connection portion 520 has a hollow structure, that is, the end surface of the flexible connection portion 520 along the axial direction has a hollow structure. The hollow structure can improve the elasticity and deformation ability of the flexible connection portion 520, thereby improving the vibration reduction effect of the elastic member.

[0546] In one embodiment, the flexible connection portion 520 is a conical coil spring coaxially arranged with the inner connecting sleeve 530. The large diameter end of the conical coil spring is connected to the inner wall of the outer connecting sleeve 510, and the small diameter end is connected to the inner connecting sleeve 530. The conical coil spring has a larger inner diameter end, and a smaller inner diameter end, which is the small diameter end. The conical coil spring has a gradually increasing or decreasing diameter along its axial direction, resulting in good strength. As the degree of deformation increases, the number of conical coil spring coils participating in the operation decreases, and the spring index also decreases. This causes the conical coil spring to become harder with pressure, thereby preventing further deformation of the conical coil spring and stabilizing the movement of the motor shaft 552.

[0547] In one embodiment, as shown in Figure 51, an inner connecting sleeve 530 secures a circuit board 553 for controlling the motor's rotation angle. The deformable portion of the inner connecting sleeve 530 can drive the circuit board 553 to move with it. A magnetic element is mounted on the motor shaft 552. A sensor on the circuit board 553 detects the magnetic element to control the electric toothbrush's wide circumferential angle, ranging from 10° to 60°. When the motor exhibits both axial displacement and circumferential rotation, the sensor-bearing circuit board 553 is mounted on an elastic element. When the motor's axial movement causes the elastic element to deform, the circuit board 553 moves axially with the motor shaft. Since the magnetic element is fixed to the motor shaft, the circuit board 553 and the magnetic element move axially together with the motor shaft. The relative distance between the sensor-bearing circuit board 553 and the magnetic element remains constant. This elastic element enables both axial movement and wide circumferential control of the toothbrush motor and electric toothbrush. The elastic element prevents the distance between the sensor-bearing circuit board 553 and the magnetic element from fluctuating, further preventing the circumferential wide-angle control function of the axially movable motor from failing.

[0548] In one embodiment, the inner connecting sleeve 530 is provided with a coupling portion for connecting to the circuit board 553 at the left end along the axial direction. The coupling portion can connect and fix the circuit board 553, thereby fixing the circuit board 553 relative to the bearing 554. When the motor shaft 552 moves significantly in the axial direction, the circuit board 553 will also move significantly in the axial direction along with the motor shaft. When the distance between the circuit board and the magnetic component is greater than the effective distance, the electric toothbrush's function of controlling the circumferential angle will fail. By controlling the distance between the circuit board and the bearing to always be within the effective range, the electric toothbrush's function of controlling the circumferential angle is ensured.

[0549] In one embodiment, as shown in Figures 44 and 51 , the coupling portion includes at least two first clips 532 arranged circumferentially. Exemplarily, the first clips 532 are evenly distributed along the circumference of the end of the inner connecting sleeve 530. The first clips 532 include a connecting arm extending axially from the first axial end face of the inner connecting sleeve 530, and a first hook disposed on the connecting arm and folded outward. The first hook and the first axial end face of the inner connecting sleeve 530 form a fixing point for securing the circuit board 553. Exemplarily, the circuit board 553 is an annular circuit board with a square hole extending through its thickness at its axis. The first hook passes through the square hole and abuts against the first axial end face of the circuit board 553. The second end face of the circuit board 553 abuts against the first axial end face of the inner connecting sleeve 530. The connecting arm and the first hook have a simple structure and are easy to manufacture. Furthermore, this structure effectively secures the circuit board 553, preventing axial movement of the circuit board 553. The first hook occupies a relatively small space, thereby avoiding interference with other components within the motor 550 and preventing the internal structure of the motor 550 from being crowded.

[0550] In one embodiment, as shown in Figures 43 and 45, the inner wall of the inner connecting sleeve 530 is provided with a first step 533 extending along its circumferential direction. The second end surface of the inner connecting sleeve 530 in the axial direction is provided with at least two inwardly folded second hooks 531 in the circumferential direction. A mounting position is formed between the first step 533 and the second hooks 531. For example, a plurality of second hooks 531 are evenly distributed along the circumferential direction on the second end surface of the inner connecting sleeve 530 in the axial direction, and the first step 533 is provided on the inner wall of the first end of the inner connecting sleeve 530 in the axial direction. The first step 533 is provided on the inner wall of the inner connecting sleeve 530 to avoid interference with the joint during use. The first step 533 and the second hook 531 are easy to process, have a good fixing effect on the bearing 554, and can prevent the bearing 554 from being dislodged due to force when moving back and forth in the axial direction. Thus, the bearing 554 has a strong ability to follow the axial movement of the bearing 554, and has a good effect in reducing vibration and stabilizing movement. The second hook 531 occupies a relatively small space, thereby avoiding interference with other components within the motor 550 and preventing the internal structure of the motor 550 from being crowded.

[0551] In one embodiment, the first step 533 is provided in one section along the circumference of the inner wall of the inner connecting sleeve 530; or, the first step 533 is provided in multiple sections along the circumference of the inner wall of the inner connecting sleeve 530; or, the first step 533 is provided in a circle along the circumference of the inner wall of the inner connecting sleeve 530. The provision of the first step 533 can abut against the end face of the bearing 554 to secure the bearing 554. The provision of the first step 533 in one section along the circumference of the inner wall of the inner connecting sleeve 530 can secure the end face of the bearing 554. The provision of the first step 533 in multiple sections along the circumference of the inner wall of the inner connecting sleeve 530, or the provision of the first step 533 in a circle along the circumference of the inner wall of the inner connecting sleeve 530, can improve the securing effect of the bearing 554 and improve the stability of the securing of the bearing 554.

[0552] In one embodiment, as shown in FIG44 , the end surface of the second hook 531 has a guide surface 5311 for guiding the bearing 554 during installation. The guide surface 5311 is an inclined surface whose height gradually decreases from the outside to the inside along the radial direction of the inner connecting sleeve 530. The guide surface 5311 is located radially inward of the end surface of the second hook 531 along the inner connecting sleeve 530. When the bearing 554 is installed in the installation position, the end surface of the bearing 554 can slide into the installation position more easily via the guide surface 5311, thereby facilitating the installation of the bearing 554.

[0553] In one embodiment, as shown in Figures 46 to 48 , the inner wall of the inner connecting sleeve 530 is provided with a first step 533. A bearing cap 540 is mounted on the second axial end of the inner connecting sleeve 530, with a mounting position formed between the first step 533 and the bearing cap 540. For example, the first step 533 is provided on the inner wall of the first axial end of the inner connecting sleeve 530 and extends circumferentially along the inner wall of the inner connecting sleeve 530. The end surface of the bearing cap 540 extends toward the center of the center hole, and the portion extending into the center hole, together with the first step 533, secures the bearing 554. The bearing cap 540 can be attached to the outer wall of the inner connecting sleeve 530 using adhesive or plastic sealing. A gap is provided between the end surface of the bearing cap 540 and the second axial end surface of the inner connecting sleeve 530. The bearing cap 540 has a simple structure and is easy to install. The fit between the first step 533 and the bearing cap 540 secures the bearing 554 effectively.

[0554] In one embodiment, as shown in FIG44 , the axial width of the outer connecting sleeve 510 is greater than the axial width of the flexible connecting portion 520 and the axial width of the inner connecting sleeve 530. That is, the outer connecting sleeve 510 has the largest axial width among the outer connecting sleeve 510, the flexible connecting portion 520, and the inner connecting sleeve 530. This arrangement can enhance the strength of the elastic member, making the elastic member more stable overall, and preventing damage or even failure of the elastic member during use, which could affect the stable operation of the motor 550.

[0555] In one embodiment, as shown in Figures 44 and 47 , the flexible connection portion 520 is connected to the middle or end portion of the outer connecting sleeve 510 in the axial direction. That is, the axial end surface of the flexible connection portion 520 where it connects to the outer connecting sleeve 510 is flush with the axial end surface of the outer connecting sleeve 510. Depending on the specific internal structure of the motor 550, the flexible connection portion 520 can be connected to the middle or end portion of the outer connecting sleeve 510 in the axial direction to improve the adaptability of the elastic member.

[0556] In one embodiment of the present application, a motor is further provided, as shown in Figures 49 to 53, comprising: a housing 551; a first stator 556, a first rotor 555, and a motor shaft 552, wherein the motor shaft 552 is axially movable and rotates with the first rotor 555, and the first stator 556 and the first rotor 555 are both fitted to the front end of the motor shaft 552; an elastic member as described above; the motor shaft 552 is connected to the housing 551 via the elastic member, a bearing 554 is provided on the outer wall of the motor shaft 552, and the motor shaft 552 is supported on the elastic member via the bearing 554, and the bearing 554 is installed in the mounting position of the inner connecting sleeve 530 and is axially fixed relative to the inner connecting sleeve 530, and the motor shaft 552 and the housing 551 can at least generate axial relative displacement via the flexible connecting portion 520. Specifically, the motor shaft 552 and the housing 551 can generate axial and / or radial relative displacement via the flexible connecting portion 520.

[0557] The motor 550 is provided with an elastic member, which can assist the motor shaft 552 in axial forward and backward movement, reduce the vibration of the motor 550 and stabilize the movement of the motor shaft 552, so that the vibration of the motor 550 is smaller and the stability is higher.

[0558] In one embodiment, a first clamping portion and a second clamping portion are provided on the inner sidewall of the housing 551. The outer connecting sleeve 510 is disposed between the first clamping portion and the second clamping portion and is axially fixed relative to the housing 551. The first clamping portion and the second clamping portion axially fix the outer connecting sleeve 510 to the housing 551, preventing the outer connecting sleeve 510 from axially moving along with the motor shaft 552 and the bearing 554, thereby preventing failure of the elastic member.

[0559] In one embodiment, as shown in FIG50 , motor 550 further includes a second stator 558 and a second rotor 557. The second stator 558 and the second rotor 557 are coupled to the rear end of a motor shaft 552. The motor shaft 552 is connected to the second rotor 557 and driven axially by the second rotating shaft. The motor shaft 552 is driven axially by the second stator 558 and the second rotor 557, thereby increasing the functionality of the motor 550.

[0560] In one embodiment, as shown in Figures 50 and 51 , elastic members are provided at both the front and rear ends of the motor shaft 552. Specifically, each end of the motor shaft 552 is supported by a corresponding elastic member within the housing 551. The elastic member includes a second connecting portion 521. Of the two end faces of the second connecting portion 521 along the axial direction of the flexible connecting portion 520, one end face has a greater inclination than the other end face. Furthermore, the ends of the two elastic members with the more inclined second connecting portions 521 are disposed opposite each other. The front end of the motor shaft 552 is supported within the front end of the housing 551 by one elastic member, while the rear end of the motor shaft 552 is supported within the rear end of the housing 551 by another elastic member. Furthermore, the ends of the two elastic members with the more inclined second connecting portions 521 are disposed opposite each other. The provision of two elastic members enhances the vibration damping effect on the motor shaft 552, further reducing vibration of the motor 550. When the motor shaft 552 moves axially, the end face with the more inclined second connecting portion 521 is more likely to deform, thereby promoting axial movement of the corresponding bearing 554. The other end face with a relatively large inclination is less likely to deform, preventing the corresponding bearing 554 from moving axially, thus acting as a springback. The two end faces with relatively large inclinations produce elastic deformation with opposite forces, which can buffer the collision force and reduce rigid collision loss. At the same time, it can also better support and restrain the motor shaft 552, preventing the motor shaft 552 from shaking significantly. At the same time, it can coordinate and stabilize the axial movement of the motor shaft 552, further improving the vibration reduction effect.

[0561] In one embodiment, as shown in Figures 50 and 51 , motor 550 further includes a circuit board 553. Circuit board 553 is illustratively annular. Circuit board 553 is positioned around the periphery of motor shaft 552 and has a free end and a fixed end. The fixed end of circuit board 553 is mounted to an inner connecting sleeve 530 of the elastic member. Inner connecting sleeve 530 connects to and secures circuit board 553, thereby securing circuit board 553 relative to bearing 554.

[0562] In one embodiment, as shown in Figures 50 to 53, the outer wall of the outer connecting sleeve 510 abuts against the inner wall of the housing 551 to secure the outer connecting sleeve 510 radially within the housing 551. Axial limiting protrusions 559 are provided on the inner wall of the housing 551 at intervals along its axial direction. Specifically, both the first and second clamping portions are axial limiting protrusions 559, and the axial ends of the outer connecting sleeve 510 abut against the axially opposite ends of the two axial limiting protrusions 559. The provision of the axial limiting protrusions 559 secures the outer connecting sleeve 510 at both ends in the axial direction, preventing axial movement of the outer connecting sleeve 510 and failure of the elastic member.

[0563] This embodiment also provides an electric toothbrush, comprising the motor 550 as described above.

[0564] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0565] It should be noted that phrases such as "in a specific implementation," "in some embodiments," "in this embodiment," and "exemplarily" mentioned in the specification indicate that the described embodiment may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0566] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0567] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0568] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0569] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric toothbrush, characterized in that, Comprising: Movement bracket; A motor, including an output shaft, a part of the motor being located within the movement bracket, the output shaft passing through the movement bracket and extending to the outside of the movement bracket; An elastic member, at least partially connected to the movement bracket, the elastic member abutting against the outer peripheral wall of the output shaft, the elastic member being configured to elastically deform according to the offset amount of the output shaft in the radial direction; A pressure sensor, disposed on the elastic member, and the pressure sensor and a circuit board being electrically connected through a connecting wire, the pressure sensor being configured to convert the elastic deformation of the elastic member into an electrical signal and transmit the electrical signal to the circuit board.

2. The electric toothbrush according to claim 1, wherein When the electric toothbrush is in a non-use state, the output shaft can rotate 360°; the electric toothbrush adjusts the rotation angle of the output shaft through a Hall element.

3. The electric toothbrush according to claim 1, wherein Further comprising a flexible member, the flexible member being disposed between the output shaft and the elastic member, the flexible member being configured to buffer the contact between the output shaft and the elastic member.

4. The electric toothbrush according to claim 3, characterized in that, The flexible member is a soft rubber sleeve; wherein, the soft rubber sleeve is sleeved on the outside of the output shaft, and the soft rubber sleeve is fixedly connected to the output shaft; the outer peripheral wall of the output shaft abuts against the elastic member through the soft rubber sleeve.

5. The electric toothbrush according to claim 4, wherein An installation portion is provided on the output shaft for mating connection with the soft rubber sleeve; wherein, the soft rubber sleeve is in mating connection with the installation portion.

6. The electric toothbrush according to claim 5, wherein The installation portion is a groove structure provided on the outside of the output shaft; wherein, the soft rubber sleeve is located within the groove structure, and the soft rubber sleeve is in interference fit with the groove structure.

7. The electric toothbrush according to claim 3, wherein, The flexible member is a soft rubber member; wherein, the soft rubber member is attached to the elastic member, and the output shaft abuts against the elastic member by abutting against the soft rubber member; the hardness of the soft rubber member is less than the hardness of the elastic member.

8. The electric toothbrush according to claim 7, wherein, The soft rubber member is a sheet-like structure.

9. The electric toothbrush according to claim 4, characterized in that, The hardness range of the flexible member is from 30 Shore hardness A to 90 Shore hardness A.

10. The electric toothbrush according to claim 4, characterized in that, The surface of the flexible member is provided with textures for reducing the surface friction coefficient of the flexible member.

11. The electric toothbrush according to claim 4, wherein, The flexible member is thermoplastic polyurethane rubber.

12. The electric toothbrush according to claim 1, wherein, The overpressure value of the output shaft is between 100 g and 500 g.

13. The electric toothbrush according to any one of claims 1-8, characterized in that, The elastic member includes an elastic portion; wherein, the output shaft abuts against the elastic portion, and the pressure sensor is fixedly connected to the elastic portion.

14. The electric toothbrush according to claim 13, wherein The elastic portion includes a first surface and a second surface facing away from each other; wherein, the output shaft abuts against the first surface, and the pressure sensor is located on the second surface.

15. The electric toothbrush according to claim 13, wherein, The elastic member further includes a fixing portion; wherein, the fixing portion is fixedly connected to the elastic portion; the fixing portion is used for connecting with the movement bracket.

16. The electric toothbrush according to claim 15, characterized in that, The movement bracket includes a first bracket and a second bracket; wherein, the first bracket and the second bracket jointly fasten the motor; the first bracket and the second bracket press and fix the fixing portion.

17. The electric toothbrush according to claim 15, wherein, The elastic member is a metal member.

18. The electric toothbrush according to any one of claims 1-8, characterized in that, The elastic member and the movement bracket are an integral structure.

19. The electric toothbrush according to claim 18, characterized in that, The elastic member includes an elastic portion and fixing portions located at both ends of the elastic portion; wherein, An opening structure is provided between the fixing portion and the elastic portion; The dimension of the opening structure in the axial direction of the output shaft is smaller than the dimension of the elastic portion in the axial direction of the output shaft.

20. The electric toothbrush according to any one of claims 1-8, characterized in that, Further comprising a brush head; wherein, The brush head is arranged at one end of the output shaft extending outside the movement bracket, and the brush head is inserted and cooperated with the output shaft; The brush head includes a brush portion for cleaning the oral cavity; The elastic member and the pressure sensor are both arranged on a surface of the output shaft facing away from the brush portion; When the brush head is subjected to a pressure in a direction away from the brush portion, the output shaft is driven to deflect in a direction close to the elastic member.

21. An electric toothbrush, characterized in that, Comprising: A bracket; A driving member, partially arranged inside the bracket, and an output shaft of the driving member extends out of the bracket; An elastic member, at least a part of the elastic member is provided with a hollow, and a part of the output shaft abuts against the hollow part of the elastic member; A sensor, arranged on one side of the elastic member, and the sensor is used for converting the elastic deformation of the elastic member into an electric signal.

22. The electric toothbrush according to claim 21, characterized in that, The elastic member is a metal plate, and a plurality of holes are formed in the metal plate to improve the elastic deformation ability of the elastic member.

23. The electric toothbrush according to claim 21, wherein, The elastic member includes a fixed portion and a free portion. The fixed portion is fixed relative to the bracket. The first end of the free portion is connected to the fixed portion, and the second end of the free portion is suspended. A part of the output shaft abuts against the free portion; The sensor is arranged on one side of the free portion.

24. The electric toothbrush according to claim 23, wherein, The elastic member has a hollow slit, and the elastic member is divided into the free portion and the fixed portion with the hollow slit as a boundary.

25. The electric toothbrush according to claim 23, wherein, A part of the output shaft abuts against the fixed portion and the free portion.

26. The electric toothbrush according to claim 23, characterized in that, The free portion is a straight structure or a bent structure.

27. The electric toothbrush according to claim 23, characterized in that, The fixed portion includes two ends arranged at intervals in the radial direction of the output shaft and a connecting plate arranged between the two ends, and the two ends are fixed relative to the bracket.

28. The electric toothbrush according to claim 27, characterized in that, A notch is formed in the connecting plate, and the first end of the free portion is connected to at least one of the end portion and the connecting plate of the fixed portion, and the second end of the free portion is suspended inside the notch.

29. The electric toothbrush according to claim 27, characterized in that, The first end of the free portion is connected to one of the end portions, and the second end of the free portion extends towards the other end portion; or The first end of the free portion is connected to the connecting plate, and the second end of the free portion extends along the axial direction of the output shaft.

30. The electric toothbrush according to claim 23, wherein, The electric toothbrush further includes a flexible member, and at least a part of the flexible member is arranged between the free portion and the output shaft, and the output shaft drives the free portion to deform through the flexible member.

31. The electric toothbrush according to claim 30, wherein, The free portion has a convex structure protruding towards one side of the flexible member, and the flexible member has a limiting groove, and at least a part of the convex structure extends into the limiting groove.

32. The electric toothbrush according to claim 30, characterized in that, The flexible member is sleeved on the output shaft; or, the flexible member is a gasket, and the gasket is arranged between the free portion and the output shaft, and the output shaft abuts against the free portion by abutting against the gasket.

33. The electric toothbrush according to any one of claims 21 to 32, characterized in that, The bracket further has a limiting portion arranged on the bracket, and the limiting portion limits the elastic deformation generated by the output shaft abutting against the elastic member by abutting against the output shaft.

34. The electric toothbrush according to claim 33, wherein, The numerical value of the vertical distance between the limiting portion and the output shaft is less than or equal to the numerical value of the maximum elastic deformation amount of the elastic member.

35. The electric toothbrush according to claim 33, wherein, The electric toothbrush further includes a flexible member, and the thickness value of the flexible member is less than or equal to the vertical distance value between the limiting portion and the output shaft.

36. The electric toothbrush according to claim 33, characterized in that, The limiting portion is provided with a rotation-limiting portion along the circumferential direction of the output shaft, and the rotation-limiting portion is used to limit the rotation angle of the output shaft.

37. The electric toothbrush according to claim 33, wherein, The limiting portion is provided with a notch portion. When the output shaft is stressed and approaches the limiting portion, the output shaft can extend into the notch portion, and the wall forming the notch portion wraps a part of the output shaft, and the wall of the notch portion can limit the radial movement of the output shaft.

38. The electric toothbrush according to any one of claims 21 to 32, characterized in that, The bracket includes a first bracket and a second bracket. The first bracket and the second bracket are buckled to form an installation cavity. An end of the first bracket, or an end of the second bracket, or an end after the first bracket and the second bracket are buckled has an opening. A part of the driving member is arranged inside the installation cavity. The output shaft penetrates through the opening at the end. The elastic member is arranged on the first bracket and / or the second bracket, and the elastic member is located at the position of the opening at the end.

39. An electric toothbrush, comprising an internal bracket, characterized in that, The internal bracket includes a first bracket and a second bracket. The first bracket and the second bracket are buckled with each other and cover the motor and the battery. Shock-absorbing portions are provided on the inner sides of the first bracket and the second bracket close to the motor and the battery. The shock-absorbing portions are integrally formed on the first bracket and the second bracket, and the shock-absorbing portions contact and buffer at least one of the motor or the battery.

40. The electric toothbrush according to claim 39, wherein, The internal bracket includes a motor fixing portion and a battery fixing portion. The first bracket includes a part of the motor fixing portion and a part of the battery fixing portion. The second bracket includes another part of the motor fixing portion and another part of the battery fixing portion. The first bracket and the second bracket are buckled with each other to form the complete motor fixing portion and battery fixing portion.

41. The electric toothbrush according to claim 40, characterized in that, The motor fixing portion and the battery fixing portion in the second bracket are in a stepped transition. When the second bracket is buckled and fixed with the first bracket, the width of the motor fixing portion jointly formed by the second bracket and the first bracket in the buckling direction is smaller than the width of the battery fixing portion jointly formed by the second bracket and the first bracket in the buckling direction.

42. The electric toothbrush according to claim 39, wherein, The shock-absorbing portion of the first bracket contacts the motor; the shock-absorbing portion of the second bracket contacts the motor and the battery.

43. The electric toothbrush according to claim 39, wherein, One of the first bracket and the second bracket is provided with a notch portion, and the other is provided with a first limiting portion. When the first bracket and the second bracket are buckled, the first limiting portion extends into the notch portion to guide and limit the installation of the first bracket and the second bracket.

44. The electric toothbrush according to claim 39, wherein, The internal bracket includes a top wall and a bottom wall. The top wall and the bottom wall are jointly arranged on one of the first bracket and the second bracket; the top wall abuts against the motor, and the bottom wall abuts against the battery.

45. The electric toothbrush according to claim 39, wherein, The first bracket or the second bracket is provided with a first heat dissipation hole, and the first heat dissipation hole is used to dissipate heat from the motor. The first bracket or the second bracket is provided with a second heat dissipation hole, and the second heat dissipation hole is used to dissipate heat from the motor and the battery.

46. The electric toothbrush according to claim 45, wherein, The first bracket is provided with a first heat dissipation hole; the second bracket is provided with a second heat dissipation hole; and the number of the second heat dissipation holes is multiple, and the multiple second heat dissipation holes are arranged at intervals along the axial direction of the second bracket to dissipate heat from the motor and the battery.

47. The electric toothbrush according to any one of claims 39 to 46, characterized in that, The electric toothbrush further includes a circuit board, the circuit board is arranged on the first bracket, the first bracket is provided with a wire arranging hole, and a cable of the motor extends out of the wire arranging hole to extend out of the inner bracket and be electrically connected to the circuit board.

48. The electric toothbrush according to claim 47, characterized in that, On a side of the circuit board facing away from the first bracket, there is an electrical connection portion, and the circuit board is further provided with a wire passing hole; The cable of the motor extending out of the wire passing hole passes through the wire passing hole and extends into a side of the circuit board facing away from the first bracket and is connected to the electrical connection portion.

49. An electric toothbrush, characterized in that, It includes a stator, a rotating shaft, a magnetic member and an induction assembly; The magnetic member is arranged on the rotating shaft; The stator can drive the magnetic member to rotate, and make the magnetic member drive the rotating shaft to rotate around the axial direction of the rotating shaft; The induction assembly is arranged at an interval from the magnetic member, and the induction assembly detects the movement position of the rotating shaft by sensing the magnetic field of the magnetic member, so that the electric toothbrush controls the rotating shaft to rotate to an expected position.

50. An electric toothbrush, characterized in that, It includes a stator, a rotating shaft, a magnetic member, an axial driving mechanism and an induction assembly; The magnetic member is arranged on the rotating shaft, the induction assembly is arranged at an interval relative to the magnetic member, the stator can drive the rotating shaft and the magnetic member to rotate together around the axial direction of the rotating shaft, and the axial driving mechanism can drive the rotating shaft and the magnetic member to move together in the axial direction; When the axial driving mechanism drives the rotating shaft and the magnetic member to move together in the axial direction, the induction assembly moves in the axial direction at the same time, so that the distance between the induction assembly and the magnetic member remains relatively unchanged; The induction assembly detects the movement position of the rotating shaft by sensing the magnetic field of the magnetic member, so that the electric toothbrush controls the rotating shaft to rotate to an expected position.

51. The electric toothbrush according to claim 50, characterized in that, The magnetic member is a magnetic column, the magnetic column at least covers part of the rotating shaft along the circumferential direction of the rotating shaft, and the induction assembly is arranged at an interval relative to the magnetic column; the stator drives the magnetic column to rotate, and the magnetic column drives the rotating shaft to rotate.

52. The electric toothbrush according to claim 49 or 51, characterized in that, The magnetic member extends continuously along the circumferential direction of the rotating shaft and covers the rotating shaft.

53. The electric toothbrush according to claim 52, wherein, The magnetic member includes at least 1 pair of N poles and S poles, and on an end face of one end of the magnetic member, the N poles and S poles are arranged adjacent to each other in sequence.

54. The electric toothbrush according to claim 49 or 51, characterized in that, The number of the magnetic members is multiple, and the multiple magnetic members are arranged in sequence along the circumferential direction of the rotating shaft.

55. The electric toothbrush according to claim 54, wherein One end of the magnetic member is an N pole or an S pole, and the polarities of the ends of two adjacent magnetic members are opposite.

56. The electric toothbrush according to claim 49 or 51, characterized in that, The induction assembly is arranged at an interval from the magnetic member in the axial direction of the rotating shaft.

57. The electric toothbrush according to claim 49 or 51, characterized in that, The induction assembly is arranged at an interval from the magnetic member in the radial direction of the rotating shaft.

58. The electric toothbrush according to claim 49 or 51, characterized in that, The induction assembly includes a Hall sensor, and the Hall sensor detects the movement position of the rotating shaft through the magnetic field intensity of the magnetic member.

59. The electric toothbrush according to claim 49 or 51, characterized in that, The induction assembly includes a magnetic encoder, and the magnetic encoder detects the movement position of the rotating shaft through the pole arrangement of the magnetic member.

60. The electric toothbrush according to claim 49 or 51, characterized in that, The induction component includes an inductive sensor, and the inductive sensor detects the movement position of the rotating shaft through the magnetic field change caused by the rotation of the magnetic part.

61. The electric toothbrush according to claim 49 or 51, characterized in that, The distance between the induction component and the magnetic part is greater than or equal to 0.2 mm and less than or equal to 1 mm.

62. The electric toothbrush according to claim 49, wherein, The electric toothbrush further includes a motor housing, and the stator, the rotating shaft and the magnetic part are arranged in the motor housing; The electric toothbrush further includes a circuit board, the circuit board is arranged in the motor housing, the induction component is arranged on the circuit board, and the circuit board is provided with an avoidance hole for avoiding the rotating shaft.

63. The electric toothbrush according to claim 62, wherein, A clamping part is arranged inside the motor housing, and the circuit board is provided with a clamping interface. The clamping part is detachably connected to the clamping interface to arrange the circuit board in the motor housing.

64. The electric toothbrush according to claim 63, wherein, The electric toothbrush further includes a bracket, the stator is arranged on the bracket, and one end of the bracket forms the clamping part.

65. The electric toothbrush according to claim 51, wherein, The electric toothbrush further includes a motor housing, and the stator, the rotating shaft and the magnetic part are arranged in the motor housing; The electric toothbrush further includes a circuit board, the circuit board is arranged in the motor housing, the induction component is arranged on the circuit board, and the circuit board is provided with an avoidance hole for avoiding the rotating shaft.

66. The electric toothbrush according to claim 50, wherein The magnetic part is a magnetic ring, the magnetic ring is sleeved on the rotating shaft, and the induction component is arranged at an interval relative to the magnetic ring; the rotation of the rotating shaft drives the magnetic ring to rotate.

67. The electric toothbrush according to claim 50, wherein, The electric toothbrush includes a driving structure, and the driving structure is connected to the induction component; When the axial driving mechanism drives the magnetic part to move axially, the driving structure drives the induction component to move axially at the same time, so that the distance between the induction component and the magnetic part remains relatively unchanged.

68. The electric toothbrush according to claim 67, wherein, The electric toothbrush further includes a circuit board, the induction component is arranged on the circuit board, and the driving structure drives the circuit board to move and makes the circuit board drive the induction component to move.

69. The electric toothbrush according to claim 50, characterized in that, The electric toothbrush includes an elastic part, the elastic part is arranged on the rotating shaft, and the rotating shaft can rotate relative to the elastic part and drive at least part of the elastic part to move in the axial direction; When the axial driving mechanism drives the rotating shaft and the magnetic part to move axially together, the rotating shaft drives at least part of the elastic part to reciprocally deform between a first position and a second position. The induction component is arranged at the deformation position of the elastic part so that the induction component and the elastic part move together, making the distance between the induction component and the magnetic part remain relatively unchanged.

70. The electric toothbrush according to claim 69, wherein, The electric toothbrush further includes a bearing, the bearing is arranged on the elastic part and sleeved on the rotating shaft; The rotating shaft can rotate relative to the elastic part through the bearing and drive the elastic part to deform axially through the bearing.

71. The electric toothbrush according to claim 50, wherein, The induction component is rotatably connected to the rotating shaft, and the rotating shaft can rotate relative to the induction component and drive the induction component to move in the axial direction so that the distance between the induction component and the magnetic part remains unchanged.

72. An electric toothbrush includes a motor, and the motor includes an elastic member, characterized in that, The elastic part includes: An inner connecting sleeve having an axially penetrating central hole, and an installation position for installing a motor bearing is arranged in the central hole; An outer connecting sleeve, located on the periphery of the inner connecting sleeve, for connecting with the motor housing; A flexible connecting portion, connected between the inner connecting sleeve and the outer connecting sleeve, and the flexible connecting portion can generate elastic deformation so that at least a relative displacement can be generated between the inner connecting sleeve and the outer connecting sleeve along the axial direction of the inner connecting sleeve.

73. The electric toothbrush according to claim 72, characterized in that, The elastic member further includes a first connecting portion and a second connecting portion. There is a radial gap between the flexible connecting portion and the inner connecting sleeve and the outer connecting sleeve respectively. The flexible connecting portion is connected to the outer wall of the inner connecting sleeve through the first connecting portion, and the flexible connecting portion is connected to the inner wall of the outer connecting sleeve through the second connecting portion.

74. The electric toothbrush according to claim 73, characterized in that, The first connecting portion and the second connecting portion are arranged offset in the circumferential direction of the flexible connecting portion.

75. The electric toothbrush according to claim 73 or 74, characterized in that, The first connecting portion is at least a pair of oppositely arranged ones, and / or the second connecting portion is at least a pair of oppositely arranged ones.

76. The electric toothbrush according to claim 73 or 74, characterized in that, The thickness of the second connecting portion at the end close to the outer connecting sleeve is greater than the thickness of the second connecting portion at the end close to the flexible connecting portion.

77. The electric toothbrush according to claim 73 or 74, characterized in that, Among the two end faces of the second connecting portion along the axial direction of the flexible connecting portion, the inclination degree of one end face is greater than that of the other end face.

78. The electric toothbrush according to claim 73 or 74, characterized in that, At least a part of the flexible connecting portion is wavy in the circumferential direction.

79. The electric toothbrush according to claim 72 or 74, characterized in that, The flexible connecting portion has a hollow structure.

80. The electric toothbrush according to claim 72 or 74, characterized in that, At least a part of the flexible connecting portion is a spring or a spring sheet.

81. The electric toothbrush according to claim 72, characterized in that, The flexible connecting portion is a spring arranged radially along the outer connecting sleeve and spaced circumferentially along the outer connecting sleeve. The outer end of the spring along the radial direction of the outer connecting sleeve is connected to the outer connecting sleeve, and the inner end along the radial direction of the outer connecting sleeve is connected to the inner connecting sleeve.

82. The electric toothbrush according to claim 72, characterized in that, The flexible connecting portion is a conical spiral spring coaxially arranged with the inner connecting sleeve. The large-diameter end of the conical spiral spring is connected to the outer connecting sleeve, and the small-diameter end is sleeved and connected to the inner connecting sleeve.

83. The electric toothbrush according to claim 72, wherein, The inner connecting sleeve fixes a circuit board for controlling the rotation angle of the motor, and the deformed displacement part of the inner connecting sleeve can drive the circuit board to move together.

84. The electric toothbrush according to claim 83, wherein, A coupling portion is arranged at the first end of the inner connecting sleeve along the axial direction, and the coupling portion is used for connecting the circuit board.

85. The electric toothbrush according to claim 84, wherein, The coupling portion includes a first clip arranged in the circumferential direction. The first clip includes a first hook that turns outwards, and the first hook and the side wall surface of the inner connecting sleeve are used for fixing the circuit board.

86. The electric toothbrush according to any one of claims 72 to 74, characterized in that, A first step is arranged on the inner wall of the inner connecting sleeve. A second hook is arranged along the circumferential direction at the second end of the inner connecting sleeve. An installation position is formed between the first step and the second hook.

87. The electric toothbrush according to claim 86, characterized in that, The end face of the second hook has a guiding surface for guiding when the bearing is installed.

88. The electric toothbrush according to any one of claims 72 to 74, characterized in that A first step is arranged on the inner wall of the inner connecting sleeve. A bearing cover is installed at the second end of the inner connecting sleeve along the axial direction. An installation position is formed between the first step and the bearing cover.

89. The electric toothbrush according to any one of claims 72 to 74, characterized in that, The axial width of the outer connecting sleeve is greater than the axial widths of the flexible connecting portion and the inner connecting sleeve.

90. The electric toothbrush according to any one of claims 72 to 74, characterized in that The flexible connecting portion is connected to the middle or end of the outer connecting sleeve along the axial direction.

91. The electric toothbrush according to any one of claims 72 to 90, characterized in that, The motor includes: A housing; A first stator, a first rotor and a motor shaft, all arranged in the housing. The motor shaft is arranged to be axially movable and rotates with the first rotor; The motor shaft is connected to the housing through the elastic member. The motor shaft is supported by a bearing on the elastic member. The bearing is installed in the installation position and is axially relatively fixed with the inner connecting sleeve. There can be at least an axial relative displacement between the motor shaft and the housing through the flexible connecting portion.

92. The electric toothbrush according to claim 91, wherein, A first clamping portion and a second clamping portion are provided on the inner side wall of the housing of the motor. The outer connecting sleeve is arranged between the first clamping portion and the second clamping portion and is axially relatively fixed with the housing.

93. The electric toothbrush according to claim 91 or 92, characterized in that, Elastic members are provided at both ends of the motor shaft. The elastic member includes a second connecting portion. Among the two end faces of the second connecting portion along the axis of the flexible connecting portion, the inclination degree of one end face is greater than that of the other end face; and the end faces with relatively larger inclination degrees of the second connecting portions in the two elastic members are arranged back to back.

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