Electric toothbrush

Abstract

The utility model provides an electric toothbrush, and relates to the technical field of electric toothbrushes. The electric toothbrush comprises a motor, an elastic piece and a pressure sensor, the motor comprises an output shaft, at least part of the motor is located in a machine core support, and the output shaft penetrates through the machine core support and extends to the outer side of the machine core support. And at least part of the elastic piece is connected with the machine core support, the elastic piece abuts against the peripheral wall of the output shaft, and the elastic piece is used for generating elastic deformation according to the offset of the output shaft in the radial direction. The pressure sensor is arranged on the side, away from the output shaft, of the elastic piece, the pressure sensor is electrically connected with the circuit board through a connecting wire, and the pressure sensor is used for converting elastic deformation into an electric signal and transmitting the electric signal to the circuit board. According to the electric toothbrush provided by the embodiment of the invention, the pressure sensor and the elastic piece are separately arranged, so that a connecting line of the pressure sensor can be prevented from being broken due to rotation of the output shaft when the electric toothbrush is in a non-use state.

Description

Technical Field

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

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

[0003] Among them, many electric toothbrushes have the problem of damaging gums and poor cleaning effect due to excessive force when used. In order to solve the above problem, a pressure sensor is usually set on the output shaft to detect the pressure on the brush head. When the pressure on the brush head is too high, an alarm can be issued to remind the user, thereby reducing damage to the gums.

[0004] However, for 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 properly and the electric toothbrush being damaged. This needs to be improved. Utility Model Content

[0005] The embodiment of the present application provides an electric toothbrush to solve the problem of the connection line of the pressure sensor being broken due to the rotation of the output shaft when the electric toothbrush is not in use in the above-mentioned related art.

[0006] The present application provides an electric toothbrush, comprising:

[0007] Movement bracket;

[0008] A motor, comprising an output shaft, wherein a portion of the motor is located in the movement bracket, and the output shaft passes through the movement bracket and extends to the outside of the movement bracket;

[0009] An elastic member, at least partially connected to the movement bracket, the elastic member abuts against the outer peripheral wall of the output shaft, and the elastic member is used to elastically deform according to the offset of the output shaft in the radial direction;

[0010] A pressure sensor is arranged 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.

[0011] The electric toothbrush in the embodiment of the present application can provide a position 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 deviates 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.

[0012] 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.

[0013] With this arrangement, the output shaft can rotate 360°, and the control of the toothbrush is adjusted through the Hall element. In this way, the swing angle of the electric toothbrush is more precise, and it can achieve a swing control of the traditional brushing angle greater than 30°, which is conducive to meeting the user's usage needs.

[0014] 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 the contact between the output shaft and the elastic member.

[0015] In this way, by setting 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 directly contacting each other to aggravate the vibration, 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 contacting the elastic part, and the elastic part can be further prevented from being subjected to excessive force or excessive force, which can cause the elastic part to be unable to rebound to the initial state after deformation, thereby improving the service life of the elastic part and further enhancing the stability of the electric toothbrush.

[0016] In a possible implementation, the flexible member is a soft rubber sleeve. 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 is the outer peripheral wall of the soft rubber sleeve, and the elastic member abuts against the outer peripheral wall of the soft rubber sleeve.

[0017] In this configuration, by setting the flexible member as a soft rubber sleeve, the output shaft indirectly abuts against the outer peripheral wall of the output shaft through the soft rubber sleeve, so that the elastic member can abut against the soft rubber sleeve, so that when the motor vibrates, the wear of the output shaft and the elastic member can be reduced, the structural strength of the output shaft and the elastic member can be ensured, and the service life of the electric toothbrush can be extended. In addition, the hardness of the soft rubber sleeve is softer than that of the output shaft, which can reduce the noise generated by the contact or friction between the output shaft and the elastic member when the motor vibrates, and improve the user experience.

[0018] In a possible implementation, a mounting portion that is cooperatively connected to the soft rubber sleeve is provided on the output shaft, wherein the soft rubber sleeve is cooperatively connected to the mounting portion.

[0019] 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.

[0020] In a possible implementation, the mounting portion is a groove structure disposed on the outer side of the output shaft, wherein the soft rubber sleeve is located in the groove structure, and the soft rubber sleeve is interference-fitted with the groove structure.

[0021] In this way, by setting the mounting portion as a groove structure, the structure of the mounting portion can be simplified, thereby reducing the difficulty of processing the output shaft. In addition, by setting the mounting portion as a groove structure, at least part of the structure of the soft rubber sleeve can be embedded in the output shaft, which can increase the connection stability between the soft rubber sleeve and the output shaft. The soft rubber sleeve is engaged in the groove structure in the axial direction of the output shaft, thereby improving the connection stability between the soft rubber sleeve and the output shaft. By making the soft rubber sleeve and the groove structure interference fit, the soft rubber sleeve can be prevented from rotating relative to the output shaft, reducing the shaking of the soft rubber sleeve, and reducing noise.

[0022] 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, and the hardness of the soft rubber member is less than that of the elastic member.

[0023] In this way, by setting the flexible member as a soft rubber member, the design flexibility of the electric toothbrush can be increased. By attaching the soft rubber member to the elastic member, so that the output shaft abuts against the elastic member through the soft rubber member, the wear of the output shaft on the elastic member can be reduced. By setting the hardness of the soft rubber member to be smaller than the hardness of the elastic member, the noise generated when the motor vibrates and contacts the elastic member can be reduced, thereby improving the user experience.

[0024] In a possible implementation manner, the soft plastic part is a sheet-like structure.

[0025] In this way, by configuring the soft rubber part as 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.

[0026] In a possible implementation, the hardness of the flexible member ranges from 30 Shore A to 90 Shore A.

[0027] This arrangement prevents the flexible part from being too small in hardness, i.e. less than 30 Shore A, which causes the flexible part to fit too closely to the arc surface of the output shaft when the output shaft abuts against the flexible part. This will increase the friction between the output shaft and the flexible part, and thus cause the possibility of abnormal noise in this case, although the degree of abnormal noise will be less than the noise generated by the direct contact between the output shaft and the elastic part; it also prevents the flexible part from being too close to the output shaft and causing interference with the vibration of the output shaft. Similarly, it prevents the output shaft from being too hard in contact with the flexible part when the hardness is too large, i.e. greater than 90 Shore A, and further prevents the output shaft from colliding with the flexible part when vibrating, causing excessive noise, although the degree of noise will be less than the noise generated by the direct contact between the output shaft and the elastic part. When the hardness range of the flexible part is set at 30 Shore A to 90 Shore A, it can basically ensure that the output shaft and the flexible part will not produce additional abnormal noise or noise, and this hardness range is also suitable for the design of small-volume electric toothbrushes.

[0028] In a possible implementation, a texture is provided on the surface of the flexible member to reduce the surface friction coefficient of the flexible member.

[0029] In this way, a texture is provided on the surface of the flexible part, which is conducive to reducing 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.

[0030] In a possible implementation manner, the flexible member is thermoplastic polyurethane rubber.

[0031] With this arrangement, the flexible part of thermoplastic polyurethane rubber is a TPU flexible part. This type of flexible part has a relatively small friction coefficient, which is also beneficial for reducing the noise between the output shaft and the flexible part, or between the flexible part and the elastic part, thereby improving the user experience.

[0032] In a possible implementation, the overpressure value of the output shaft is between 100g and 500g.

[0033] 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 force of brushing is too strong; this meets the demand for the use of small-volume electric toothbrushes and is conducive to the use of small-volume electric toothbrushes.

[0034] In a possible implementation manner, 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.

[0035] In this way, by configuring the elastic member to include an elastic part and connecting the pressure sensor to the elastic part, the pressure sensor can accurately generate an electrical signal according to the elastic deformation of the elastic part, thereby improving the sensitivity of the elastic member, thereby improving the sensitivity of the pressure sensor, and improving the accuracy of the pressure sensor measurement data. In addition, the pressure sensor can be configured separately from the output shaft, which is different from the related art in which the pressure sensor is directly connected to the output shaft. This can prevent the problem of the connection line of the pressure sensor being broken due to the rotation of the output shaft when not in use, thereby ensuring the normal use of the electric toothbrush.

[0036] In a possible implementation, the elastic member includes a first surface and a second surface that are away from each other, wherein the output shaft abuts against the first surface, and the pressure sensor is located on the second surface.

[0037] In this way, by abutting the first surface of the elastic member against the outer wall of the output shaft and setting the pressure sensor on the second surface of the elastic member, it is convenient to abut the output shaft against the elastic member without hindering the pressure sensor from monitoring the elastic deformation of the elastic member. 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.

[0038] In a possible implementation, the elastic member includes a fixing portion, wherein the fixing portion is fixedly connected to the elastic portion, and the fixing portion is used to be connected to the movement bracket.

[0039] In this arrangement, the elastic member includes a fixing portion connected to the elastic part, and the fixing portion is connected to the movement bracket, thereby improving the stability of the elastic member. By providing a separate fixing portion, it is convenient to assemble 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 improving the user experience.

[0040] 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 buckled with the motor, and the first bracket and the second bracket are pressed together to fix the fixing portion.

[0041] In this way, by configuring the movement bracket to include the first bracket and the second bracket, and by fastening the first bracket and the second bracket together with the motor, the motor can be more stably fixed inside the movement bracket, and when the motor has a problem and needs to be repaired, this configuration can also facilitate the disassembly of the first bracket and the second bracket to maintain the motor. After the maintenance is completed, the original first bracket and the second bracket can continue to be used, 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.

[0042] In a possible implementation manner, the elastic member is a metal member.

[0043] 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 the elastic member to fail. In other words, the service life of the elastic member can be extended.

[0044] In a possible implementation, the elastic member and the movement support are an integrated structure.

[0045] In this way, by setting the elastic member and the core bracket as an integrated structure, the connection stability between the elastic member and the core bracket can be improved, thereby extending the service life of the elastic member. In addition, the core bracket can be obtained by an integrated molding method, and there is no need to assemble the elastic member and the core bracket. In other words, this can reduce the assembly process of the electric toothbrush, thereby reducing the assembly difficulty and cost.

[0046] In a possible implementation, the elastic member and the movement support are formed into an integrated structure by injection molding.

[0047] By configuring in this way, the elastic member and the movement bracket are formed into an integrated structure by injection molding, which can reduce the difficulty of processing the movement bracket and save costs.

[0048] In a 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 size of the opening structure in the axial direction of the output shaft is smaller than the size of the elastic portion in the axial direction of the output shaft.

[0049] In this way, by providing the opening structure, the elasticity of the elastic member can be improved, so that the elastic part of the elastic member can be more easily deformed under pressure, thereby improving the accuracy of the pressure sensor measurement. By setting the size of the opening structure in the axial direction of the output shaft smaller than the size of the elastic part in the axial direction of the output shaft, a stable connection between the elastic part and the fixed part is ensured.

[0050] In a possible implementation, the electric toothbrush further includes a brush head. The brush head is arranged at one end of the output shaft extending to the outside of the movement bracket, and the brush head is plugged into the output shaft. The brush head includes a brush portion, which is used to clean the oral cavity. The elastic member and the pressure sensor are both arranged on a side of the output shaft away from the brush portion. When the brush head is subjected to pressure in a direction away from the brush portion, the output shaft is driven to deviate in a direction close to the elastic member.

[0051] By configuring the brush head in this way, the electric toothbrush can achieve the function of cleaning the oral cavity. By plugging and matching the brush head with the output shaft, the brush head can be easily replaced.

[0052] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] 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 paying any creative work.

[0054] Figure 1 A schematic diagram of the structure of an electric toothbrush provided in an embodiment of the present application;

[0055] Figure 2 A schematic diagram of the exploded structure of an electric toothbrush provided in an embodiment of the present application;

[0056] Figure 3 A schematic cross-sectional structure diagram of an electric toothbrush provided in an embodiment of the present application;

[0057] Figure 4 A schematic diagram of the structure of an elastic member of an electric toothbrush provided in an embodiment of the present application;

[0058] Figure 5 A schematic cross-sectional view of another electric toothbrush provided in an embodiment of the present application;

[0059] Figure 6 for Figure 5 A schematic diagram of a portion of the structure of the movement support of the electric toothbrush shown in FIG.

[0060] Figure 7A schematic cross-sectional structure diagram of another electric toothbrush provided in an embodiment of the present application;

[0061] Figure 8 A schematic cross-sectional structure diagram of another electric toothbrush provided in an embodiment of the present application;

[0062] Fig. 9 A schematic diagram of a portion of the structure of the output shaft of the electric toothbrush provided in an embodiment of the present application;

[0063] Fig.10 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;

[0064] Fig.11 A partial schematic diagram of the cross-sectional structure of the mating portion of the brush head of an electric toothbrush provided in an embodiment of the present application.

[0065] Description of reference numerals:

[0066] 100-electric toothbrush; 110-brush head; 111-matching part;

[0067] 1111-limiting portion; 1112-inclined surface; 1113-fixed end;

[0068] 1114-free end; 112-brush portion; 120-body;

[0069] 130- movement bracket; 131- first bracket; 132- second bracket;

[0070] 140-motor; 141-output shaft; 1411-installation portion;

[0071] 142-assembly portion; 1421-first assembly plane; 1422-second assembly plane;

[0072] 1423-guide surface; 143-engaging portion; 150-elastic member;

[0073] 151-fixing part; 152-elastic part; 153-connecting part;

[0074] 154-first surface; 155-second surface; 156-opening structure;

[0075] 160-pressure sensor; 161-connecting wire; 170-flexible part;

[0076] 180-Circuit board. DETAILED DESCRIPTION

[0077] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, 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 creative work belong to the scope of protection of this application.

[0078] The electric toothbrush provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0079] like Figure 1 As shown, an 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 clean the oral cavity more conveniently.

[0080] like Figure 2 As shown, 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 .

[0081] Combination Figure 2 and Figure 3 As shown, the motor 140 may include an output shaft 141 , and a portion of the motor 140 is located in the movement bracket 130 , the output shaft 141 passes through the movement bracket 130 , and extends to the outside of the movement bracket 130 .

[0082] 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.

[0083] 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. Exemplarily, 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.

[0084] Continue to see Figure 2 and Figure 3As shown, at least part of the structure of the elastic member 150 is connected to the movement bracket 130, and the elastic member 150 abuts against the outer peripheral wall of the output shaft 141. The elastic member 150 is used to elastically deform according to the offset of the output shaft 141 in the radial direction (y direction in the figure). The pressure sensor 160 is arranged on the elastic member 150, and the pressure sensor 160 and the circuit board 180 are electrically connected through the connecting line 161. The pressure sensor 160 is used to convert the elastic deformation into an electrical signal and transmit the electrical signal to the circuit board 180.

[0085] Combination Figure 1 and Figure 2 As shown, the brush head 110 can be arranged 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 the output shaft 141. The brush head 110 includes a brush portion 112, and the brush portion 112 is used to clean the oral cavity. Among them, the elastic member 150 and the pressure sensor 160 are both arranged on the side of the output shaft 141 away from the brush portion 112. When the brush head 110 is subjected to pressure in the direction away from the brush portion 112, it drives the output shaft 141 to deviate in the direction close to the elastic member 150.

[0086] By providing the 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 the brush part 112, the cleaning effect of the electric toothbrush 100 can be improved. By providing the elastic member 150 and the pressure sensor 160 on the side of the output shaft 141 away from the brush part 112, when the user brushes his teeth, the positive pressure on the elastic member 150 can be maximized, thereby improving the accuracy of the pressure sensor 160 in measuring the pressure of the brush head 110.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] The electric toothbrush 100 in the embodiment of the present application can provide a position for the installation of the circuit board 180 and the motor 140 by setting the movement bracket 130, and play a role in stabilizing the motor 140. By setting the elastic member 150, and setting the elastic member 150 to abut against the outer peripheral wall of the output shaft 141, when the output shaft 141 of the electric toothbrush 100 is pressed and deviates in the direction close to the elastic member 150, the elastic member 150 will be squeezed, so that the elastic member 150 will produce elastic deformation. By setting 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 with the related art, in which the pressure sensor 160 is directly connected to the output shaft 141, the technical solution of the present application can prevent the problem of the connection line 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, so as to ensure the normal use of the electric toothbrush 100.

[0091] Continue to see Figure 2 and Figure 3 As shown, the electric toothbrush 100 provided in the embodiment of the present application may further include a flexible member 170 , which is disposed between the output shaft 141 and the elastic member 150 to buffer the contact between the output shaft 141 and the elastic member 150 .

[0092] By providing the flexible member 170 and providing 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, and the direct contact between the output shaft 141 and the elastic member 150 can be avoided to aggravate the vibration, and reduce the noise generated by the contact between the output shaft 141 and the elastic member 150; and because the flexible member 170 is relatively soft, the output shaft 141 can be avoided from hard contact with the elastic member 150, and the elastic member 150 can be further prevented from being subjected to excessive force or excessive force, which can cause the elastic member 150 to be unable to rebound to the initial state after deformation, thereby improving the service life of the elastic member 150 and further enhancing the stability of the electric toothbrush 100.

[0093] In a possible implementation, the flexible member 170 may be a soft rubber sleeve. The soft rubber sleeve is sleeved 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, so that 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.

[0094] For example, Figure 2 As shown, the output shaft 141 is provided with a mounting portion 1411 that is connected with the soft rubber sleeve. The soft rubber sleeve is connected with the mounting portion 1411. The mounting portion 1411 is a groove structure arranged 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 in the groove structure, and the soft rubber sleeve and the groove structure are interference fit.

[0095] By providing the mounting portion 1411 on the output shaft 141, a mounting position is provided for the soft rubber sleeve, and the mounting stability of the soft rubber sleeve is improved, thereby improving the stability of the electric toothbrush 100. At the same time, when the electric toothbrush 100 is produced and assembled, the setting of the mounting portion 1411 can better enable the soft rubber sleeve to be installed, thereby improving the installation and production efficiency. By providing the mounting portion 1411 as a groove structure, the structure of the mounting portion 1411 can be simplified, thereby reducing the difficulty of processing the output shaft 141.

[0096] In addition, by setting the mounting portion 1411 as a groove structure, at least part of the structure of the soft rubber sleeve can be embedded in the output shaft 141, which can increase the connection stability between the soft rubber sleeve and the output shaft 141. By setting the size of the groove structure in the axial direction of the output shaft 141 to be greater than or equal to the size 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 improving the connection stability between the soft rubber sleeve and the output shaft 141.

[0097] By making the soft rubber sleeve and the groove structure interference fit, the soft rubber sleeve can be prevented from rotating relative to the output shaft 141, the shaking of the soft rubber sleeve can be reduced, and the noise can be reduced.

[0098] 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 away from 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 a 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 achieving accurate detection of the pressure applied to the brush head 110.

[0099] 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 specifically set according to the requirements of the electric toothbrush 100.

[0100] In a 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 small, i.e., less than 30 Shore A, causing the flexible member 170 to fit too closely to the arc surface of the output shaft 141 when the output shaft 141 abuts against the flexible member 170, thereby increasing the friction between the output shaft 141 and the flexible member 170, and thus causing the possibility of abnormal noise in this case, although the degree of abnormal noise will be less than the noise generated by the direct contact between the output shaft 141 and the elastic member 150; it also prevents the flexible member 170 from being too close to the output shaft 141 and causing vibration interference to the output shaft 141. Similarly, it prevents the hardness from being too large, i.e., greater than 90 Shore A, causing the output shaft 141 and the flexible member 170 to contact too hard, and further prevents the output shaft 141 from colliding with the flexible member 170 when vibrating, causing excessive noise, although the degree of noise will be less than the noise generated by the 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.

[0101] In a possible implementation, the surface of the flexible member 170 is provided with a texture to reduce the surface friction coefficient of the flexible member 170. In this way, the surface of the flexible member 170 is provided with a texture, which is conducive to reducing the surface friction coefficient of the flexible member 170, so that when the output shaft 141 contacts the flexible member 170, or the flexible member 170 contacts the elastic member 150, the smaller friction coefficient is more conducive to the relative rotation of the output shaft 141 and the flexible member 170, or the flexible member 170 and the elastic member 150, and further helps to reduce the noise of the electric toothbrush 100. Regarding the direction of the texture, it can be perpendicular to the axis of the output shaft 141 of the motor 140, so that the texture is basically in point contact with the output shaft 141, which is conducive to reducing friction and further facilitating the vibration of the output shaft 141.

[0102] 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 for reducing the noise between the output shaft and the flexible part 170, or between the flexible part 170 and the elastic part 150, thereby improving the user experience.

[0103] In a possible implementation, the overpressure value of the output shaft 141 is between 100g and 500g. With this configuration, when the user uses the electric toothbrush 100, when the force acting on the output shaft 141 is between 100g and 500g, the pressure sensor 160 will be triggered, so that the electric toothbrush 100 will remind the user that the brushing force is too strong; this meets the use requirements of a small-volume electric toothbrush 100 and is conducive to the use of a small-volume electric toothbrush 100.

[0104] Continue to see Figure 2 and Figure 3 As shown, the movement bracket 130 may include a first bracket 131 and a second bracket 132. The first bracket 131 and the second bracket 132 are buckled together with the motor 140. For example, the first bracket 131 and the second bracket 132 are arranged opposite to each other, and a receiving cavity is formed between the first bracket 131 and the second bracket 132. The motor 140 is located in the receiving cavity, and the first bracket 131 and the second bracket 132 are buckled with each other to fix the motor 140 in the receiving cavity. Part of the structure of the output shaft 141 extends axially to the outside of the receiving 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 (such as Figure 2 shown).

[0105] By configuring the movement bracket 130 to include a first bracket 131 and a second bracket 132, and the first bracket 131 and the second bracket 132 are buckled together with the motor 140, the motor 140 can be more stably fixed inside the movement bracket 130, and when the motor 140 has a problem and needs maintenance, this configuration 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 configuring the movement bracket 130 as an integrated structure, this can reduce maintenance costs.

[0106] like Figure 3 As shown, the first bracket 131 and the second bracket 132 are pressed together to fix a part of the elastic member 150, so that the elastic member 150 is fixedly connected to the movement bracket 130. By pressing the first bracket 131 and the second bracket 132 together to fix the elastic member 150, the connection stability between the elastic member 150 and the movement bracket 130 can be improved.

[0107] In one possible implementation, Figure 4 As shown, the elastic member 150 and the movement bracket 130 are of a split structure. The elastic member 150 and the movement bracket 130 are connected by welding, bonding, riveting, fastener connection or clamping.

[0108] By configuring the elastic member 150 and the core bracket 130 as a split structure, the design flexibility of the elastic member 150 can be improved, so that when the elastic member 150 fails, the elastic member 150 can be disassembled for repair or replacement, which can reduce maintenance costs compared to replacing the entire core bracket 130. In addition, by configuring the elastic member 150 and the core bracket 130 as a split structure, the elastic member 150 and the core bracket 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 bracket 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.

[0109] 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, and the pressure sensor 160 is fixedly connected to the elastic portion 152 (see Figure 3 shown).

[0110] The first bracket 131 and the second bracket 132 are pressed together to fix the fixing portion 151 , so that the connection stability between the elastic member 150 and the movement bracket 130 can be improved.

[0111] The elastic member 150 includes a fixing portion 151 connected to the elastic portion 152, and is connected to the movement bracket 130 through the fixing portion 151, thereby improving the stability of the elastic member 150. By providing a separate fixing portion 151, it is convenient to assemble the elastic member 150, and the elasticity of the elastic portion 152 is not affected, so as to ensure the sensitivity of the elastic member 150, thereby improving the sensitivity of the pressure sensor 160 and improving the user experience.

[0112] By providing the elastic member 150 with 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 according to 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 improving the accuracy of the data measured by the pressure sensor 160. In addition, the pressure sensor 160 can be provided separately from the output shaft 141, which is different from the related art in which the pressure sensor 160 is directly connected to the output shaft 141. In this way, the problem of the connection line 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 can be prevented, so as to ensure the normal use of the electric toothbrush 100.

[0113] Exemplarily, a connecting portion 153 may 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, and an arc-shaped transition structure may be provided between the connecting portion 153 and the fixed portion 151 and the elastic portion 152, so that the connecting portion 153 can be smoother, and sharp right angles can be reduced, thereby preventing scratches on other components or workers when assembling the electric toothbrush 100, thereby improving safety.

[0114] In some embodiments, the elastic portion 152 may include a first surface 154 and a second surface 155 that are separated from each other. 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-like structure.

[0115] By bringing the first surface 154 of the elastic portion 152 into contact with the outer wall of the output shaft 141 and setting the pressure sensor 160 on the second surface 155 of the elastic member 150, it is 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 set separately, and the setting method is simple, which can reduce the difficulty of processing and assembly.

[0116] like Figure 4 As shown, in the direction perpendicular to the first surface 154 of the elastic portion 152, the fixed portion 151 and the elastic portion 152 are located in different planes, that is, in the direction perpendicular to the first surface 154 of the elastic portion 152, there is a certain height difference between the fixed portion 151 and the elastic portion 152, so that the elastic portion 152 that undergoes elastic deformation and the fixed portion 151 used for fixing can be separately arranged to prevent the fixed portion 151 from being deformed when the elastic portion 152 is deformed, thereby causing an unstable connection between the fixed portion 151 and the movement bracket 130.

[0117] Of course, in other embodiments, the elastic member 150 may also be configured as other structures, for example, the elastic member 150 may be configured as a straight plate-like structure or a sheet-like structure, and the fixing portion 151 and the elastic portion 152 are located in the same plane. In the embodiment of the present application, the specific structure of the elastic member 150 is not further limited.

[0118] Exemplarily, the elastic member 150 may be a metal member.

[0119] 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 the elastic member 150 to fail. In other words, the service life of the elastic member 150 can be extended in this way.

[0120] 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.

[0121] It should be noted that, in some embodiments, the elastic member 150 may be a separate component, which is fixedly connected to the movement bracket 130 by a specific connection method. Of course, in other embodiments, the elastic member 150 may also be configured as an integrated structure with the movement bracket 130, that is, the elastic member 150 may be a part of the movement bracket 130.

[0122] like Figure 5 As shown, in a possible implementation, the elastic member 150 and the movement support 130 are an integrated structure.

[0123] By setting the elastic member 150 and the core bracket 130 as an integrated structure, the connection stability between the elastic member 150 and the core bracket 130 can be improved, thereby extending the service life of the elastic member 150. In addition, the core bracket 130 can be obtained by an integrated molding method, and the elastic member 150 and the core bracket 130 do not need to be assembled. In other words, this can reduce the assembly process of the electric toothbrush 100, thereby reducing the assembly difficulty and reducing the cost.

[0124] In a possible implementation, the elastic member 150 and the movement support 130 are formed into an integrated structure by injection molding.

[0125] By forming the elastic member 150 and the movement bracket 130 into an integrated structure through injection molding, the processing difficulty of the movement bracket 130 can be reduced and the cost can be saved.

[0126] like Figure 6 As shown, the elastic member 150 includes an elastic portion 152 and a fixing portion 151 located at both ends of the elastic portion 152, and the fixing portion 151 is integrally formed with the movement bracket 130. An opening structure 156 is provided between the fixing portion 151 and the elastic portion 152. Exemplarily, the two opening structures 156 are respectively located at both ends of the elastic portion 152. The size of the opening structure 156 in the axial direction of the output shaft 141 is smaller than that of the elastic portion 152 to ensure a stable connection between the elastic portion 152 and the fixing portion 151.

[0127] Exemplarily, in the axial direction of the output shaft 141 , the elastic member 150 has a symmetrical structure.

[0128] 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 .

[0129] 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.

[0130] 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 other structures and may also be arranged at other positions.

[0131] like Figure 7 and Figure 8 As shown, 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.

[0132] By setting 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, so that the output shaft 141 abuts against the elastic member 150 through the soft rubber member, the wear of the output shaft 141 on the elastic member 150 can be reduced. By setting the hardness of the soft rubber member to be smaller than the hardness of the elastic member 150, the noise generated when the motor 140 vibrates and contacts the elastic member 150 can be reduced, thereby improving the user experience.

[0133] Exemplarily, the soft plastic part may be a sheet-like structure. That is, the flexible part 170 is a sheet-like structure.

[0134] By setting the soft plastic part as a sheet structure, the structure of the soft plastic part can be simplified, and there is no need to set the mounting portion 1411 on the output shaft 141, which can simplify the structure of the output shaft 141, reduce the difficulty of processing the soft plastic part and the output shaft 141, and thus reduce the cost. In addition, the deformation of the output shaft 141 can be more directly transmitted to the pressure sensor 160 on the elastic part 150, thereby improving the accuracy of pressure detection and enhancing the user experience.

[0135] In the embodiment of the present application, the soft plastic part can be fixedly connected with the elastic part 150 by integral injection molding, bonding, etc. When the elastic part 150 includes an elastic part 152 and a fixed part 151, the soft plastic part can be attached to the elastic part 152 of the elastic part 150 by bonding. Since the elastic part 152 is in contact with the output shaft 141, the size of the elastic part 150 can be reduced by only setting the soft plastic part on the elastic part 152, thereby reducing the cost. The size of the soft plastic part is not further limited.

[0136] 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.

[0137] Of course, in other embodiments, the flexible member 170 may also be other structures, or be disposed at other positions. In the embodiment of the present application, no further limitation is made to the structure and the position of the flexible member 170. 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 the hardness of the output shaft 141, the contact between the output shaft 141 and the elastic member 150 can be buffered.

[0138] The connection relationship between the brush head 110 and the output shaft 141 is described below with reference to the accompanying drawings.

[0139] In one possible implementation, Fig. 9 As shown, the output shaft 141 is provided with a mounting portion 142. The brush head 110 includes a matching portion 111 connected to the mounting portion 142 (see Fig.10 The assembly portion 142 is plug-fitted with the mating portion 111.

[0140] By setting the assembly part 142 on the output shaft 141 and the 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.

[0141] 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 which are arranged opposite to each other in the radial direction of the output shaft 141. The size of the first assembly plane 1421 in the radial direction of the output shaft 141 is different from the size of the second assembly plane 1422 in the radial direction of the output shaft 141.

[0142] Exemplarily, 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 .

[0143] By setting the assembly part 142 at the end of the output shaft 141, processing can be facilitated. By setting the assembly part 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, the brush head 110 can be prevented from loosening, the normal use of the electric toothbrush 100 can be ensured, and the user experience can be improved. By setting the size of the first assembly plane 1421 in the radial direction of the output shaft 141 to be different from the size of the second assembly plane 1422 in the radial direction of the output shaft 141, the wrong installation direction of the brush head 110 can be prevented.

[0144] In a possible implementation, at least one of the first assembly plane 1421 and the second assembly plane 1422 is provided with a guide surface 1423. The guide surface 1423 is located at one end of the assembly portion 142 away from the movement bracket 130. In the direction from the motor 140 to the brush head 110, the guide surface 1423 gradually tilts toward the direction close to the central axis of the output shaft 141. Exemplarily, the guide surface 1423 is provided at one end of the first assembly plane 1421 away from the movement bracket 130.

[0145] 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 an inclined surface, when the assembly part 142 is assembled with the matching part 111, the inclined surface can reduce friction, thereby reducing the difficulty of installing the brush head 110 and the output shaft 141.

[0146] like Fig.10 As shown, the output shaft 141 is also provided with a clamping portion 143. A limiting portion 1111 connected to the clamping portion 143 is provided in the matching portion 111, and the limiting portion 1111 is elastically connected to the matching portion 111 in the radial direction of the output shaft 141. When the brush head 110 is connected with the output shaft 141, the clamping portion 143 is connected with the limiting portion 1111.

[0147] 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, and the brush head 110 can be prevented 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 can be matched and connected, reducing the difficulty of installing the brush head 110 and improving the user experience.

[0148] In a possible implementation, one of the engaging portion 143 and the limiting portion 1111 is an engaging groove, and the other is an engaging protrusion. The shapes of the engaging groove and the engaging protrusion match, and when the brush head 110 is connected with the output shaft 141, the engaging protrusion is connected with the engaging groove. Exemplarily, the engaging portion 143 is an engaging groove, and the limiting portion 1111 is an engaging protrusion.

[0149] By providing the engaging protrusions or engaging grooves on the engaging portion 143 and the limiting portion 1111 , the difficulty of processing the engaging portion 143 and the limiting portion 1111 can be reduced, thereby reducing the cost.

[0150] In one possible implementation, Fig.11As shown, in the axial direction of the output shaft 141, the engagement protrusion of the limiting portion 1111 includes two inclined surfaces 1112 arranged opposite to each other. The engagement protrusion includes a fixed end 1113 and a free end 1114, and 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 engagement protrusion.

[0151] 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.

[0152] 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, and when installed to a specific position, the limiting portion 1111 can be engaged and connected with the locking portion 143.

[0153] It should be noted that, in some other embodiments, the engaging portion 143 and the limiting portion 1111 may also be set as other structures. In the embodiment of the present application, the specific structure of the engaging portion 143 and the limiting portion 1111 is not further limited.

[0154] 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.

[0155] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0156] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0157] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0158] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., 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 shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0159] 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 it. 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric toothbrush, characterized in that: include: Movement bracket; A motor, comprising an output shaft, wherein a portion of the motor is located in the movement bracket, and the output shaft passes through the movement bracket and extends to the outside of the movement bracket; An elastic member, at least partially connected to the movement bracket, the elastic member abuts against the outer peripheral wall of the output shaft, and the elastic member is used to elastically deform according to the offset of the output shaft in the radial direction; A pressure sensor is arranged on the elastic member, and the pressure sensor and the circuit board are electrically connected through a connecting line. The pressure sensor is used 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, characterized in that: 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.

3. The electric toothbrush according to claim 1, characterized in that: It also includes a flexible member, which is arranged between the output shaft and the elastic member, and is used 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, characterized in that: The output shaft is provided with a mounting portion which is connected with the soft rubber sleeve; wherein, The soft rubber sleeve is cooperatively connected with the mounting portion.

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

7. The electric toothbrush according to claim 3, characterized in that: The flexible part is a soft rubber part; wherein, The soft rubber part is attached to the elastic part, and the output shaft abuts against the elastic part by abutting against the soft rubber part; The hardness of the soft rubber part is smaller than that of the elastic part.

8. The electric toothbrush according to claim 7, characterized in that: The soft rubber part is a sheet-like structure.

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

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

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

14. The electric toothbrush according to claim 13, characterized in that: The elastic portion includes a first surface and a second surface which are opposite to 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, characterized in that: The elastic member also includes a fixing portion; wherein, The fixing portion is fixedly connected to the elastic portion; The fixing portion is used to be connected to 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 are jointly buckled with the motor; The first bracket and the second bracket are pressed together to fix the fixing portion.

17. The electric toothbrush according to claim 15, characterized in that The elastic member is a metal member.

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

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

20. The electric toothbrush according to any one of claims 1 to 8, characterized in that: Also includes a brush head; wherein, The brush head is arranged at one end of the output shaft extending to the outside of the movement bracket, and the brush head is plug-fitted with the output shaft; The brush head comprises a brush portion, and the brush portion is used for cleaning the oral cavity; The elastic member and the pressure sensor are both arranged on a side of the output shaft away from the brush portion; When the brush head is subjected to pressure in a direction away from the brush portion, the output shaft is driven to deviate in a direction close to the elastic member.

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