Oral cleaning appliance

Abstract

The utility model provides an oral cavity cleaning tool, which comprises a handle shell, a handle, a handle, a handle, a handle and a handle, the machine core assembly comprises a mounting support and a driving assembly, the mounting support is located in the containing cavity and fixed to the handle shell, the driving assembly is fixed to the mounting support and provided with an output shaft, the output shaft can rotate around the axis of the output shaft in a reciprocating mode and stretch out and draw back in the axis direction of the output shaft, and the output shaft penetrates through the shaft hole; at least part of the first sealing piece is located between the hole wall of the shaft hole and the output shaft and used for sealing a gap between the output shaft and the hole wall; and the second sealing piece is positioned between the output shaft and the mounting bracket and is used for sealing a gap between the output shaft and the mounting bracket. Even if part of liquid enters the containing cavity from the gap between the output shaft and the first sealing piece, the second sealing piece can also intercept the part of liquid outside the installation support. In this way, the risk that the driving assembly makes contact with the liquid can be avoided, and the working reliability of the oral cavity cleaning tool can be improved.

Description

Technical Field

[0001] This application relates to the technical field of oral cleaning, and particularly relates to an oral cleaning appliance. Background Art

[0002] An oral cleaning appliance in the related art includes a handle housing and a movement mechanism assembly disposed within the handle housing. Among them, the movement mechanism assembly includes a drive assembly having an output shaft, and the output shaft passes through a shaft hole provided at one end of the handle housing. Taking an electric toothbrush as an example, a partial structure of the output shaft passes through the shaft hole of the handle housing and is used to connect to a brush head, so as to drive the brush head to move.

[0003] Generally, an oral cleaning appliance is provided with a seal to seal the gap between the output shaft and the hole wall of the shaft hole, so as to prevent external liquid from entering the handle housing and further protect the movement mechanism assembly. However, when the output shaft moves along its own axis direction, the seal will be axially pulled, thereby affecting the sealing performance of the seal, and there is a risk of liquid entering the inside of the handle housing. Once the liquid entering the handle housing comes into contact with the drive assembly, it is likely to cause a failure of the drive assembly, thereby affecting the working reliability of the oral cleaning appliance. Summary of the Utility Model

[0004] This application provides an oral cleaning appliance, aiming to reduce the risk of the drive assembly coming into contact with liquid, so as to improve the working reliability of the oral cleaning appliance.

[0005] The specific technical solution is as follows:

[0006] This application provides an oral cleaning appliance, which includes: a handle housing having a receiving cavity and a shaft hole communicating with the receiving cavity; a movement mechanism assembly including a mounting bracket and a drive assembly, the mounting bracket is located within the receiving cavity and fixed to the handle housing, the drive assembly is fixed to the mounting bracket and has an output shaft, the output shaft can reciprocally rotate around its own axis and telescopically move along its own axis direction, the output shaft passes through the shaft hole; a first seal, at least partially located between the hole wall of the shaft hole and the output shaft, for sealing the gap between the output shaft and the hole wall; and a second seal, located between the output shaft and the mounting bracket, for sealing the gap between the output shaft and the mounting bracket.

[0007] In the oral cleaning appliance according to the embodiments of the present application, a first seal and a second seal are provided. At least a part of the first seal is located between the hole wall of the shaft hole and the output shaft to seal the gap between the output shaft and the hole wall. The second seal is located between the output shaft and the mounting bracket to seal the gap between the output shaft and the mounting bracket. In this way, a double-sealing effect is formed at the position where the output shaft is located. Among them, the first seal forms the first sealing structure, which is mainly used to prevent external liquid from entering the accommodating cavity through the gap between the output shaft and the hole wall of the shaft hole. Since the output shaft is a moving part, the first seal will be pulled by the output shaft during the movement of the output shaft, so its sealing performance may be affected. And the second seal forms the second sealing structure, which enables even if part of the liquid enters the accommodating cavity from the gap between the output shaft and the first seal, the second seal can intercept this part of the liquid outside the mounting bracket, so that this part of the liquid will not enter the position where the driving component is located through the gap between the output shaft and the mounting bracket. In this way, the risk of contact between the driving component and the liquid can be avoided, and thus the working reliability of the oral cleaning appliance can be improved.

[0008] In some embodiments, the mounting bracket includes a bracket main body and a clamping portion connected to the bracket main body. The bracket main body is fixed to the handle housing, and the clamping portion is located at one end of the bracket main body close to the shaft hole. The clamping portion and the bracket main body jointly define an installation space, and the second seal is arranged in the installation space so that the second seal is limited in the axial direction of the output shaft by the clamping portion and the bracket main body, and is limited in the radial direction of the output shaft by the clamping portion and the output shaft. The second seal is used to seal the gap between the clamping portion and the output shaft.

[0009] In some embodiments, the second seal is compressed both in the axial direction of the output shaft and in the radial direction of the output shaft.

[0010] In some embodiments, the clamping portion and the bracket main body are integrally formed.

[0011] In some embodiments, the clamping portion and the bracket main body are separately formed. An annular baffle is provided at one end of the bracket main body close to the shaft hole, and the annular baffle defines an installation groove. The clamping portion is limited in the radial direction of the output shaft in the installation groove. The clamping portion is adhesively bonded to the inner wall of the installation groove by glue, or the clamping portion is in interference fit with the inner wall of the installation groove.

[0012] In some embodiments, the second seal is a Y-shaped sealing ring, and the Y-shaped sealing ring includes a base portion and a Y-shaped lip portion connected to the base portion; wherein, the base portion and the Y-shaped lip portion are arranged along the axial direction of the output shaft, and the Y-shaped lip portion is located on the side of the base portion close to the shaft hole, or, the base portion and the Y-shaped lip portion are arranged along the radial direction of the output shaft, and the Y-shaped lip portion is located on the side of the base portion close to the output shaft.

[0013] In some embodiments, the first seal includes a sleeved portion, a linkage portion, and a clamping portion connected in sequence. The sleeved portion is sleeved on the output shaft, and the clamping portion is clamped between the mounting bracket and the handle housing; the sleeved portion includes a first sleeve portion and a second sleeve portion. The first sleeve portion is connected to the linkage portion, and the second sleeve portion is connected to the first sleeve portion; wherein, the binding force between the first sleeve portion and the output shaft is less than the binding force between the second sleeve portion and the output shaft.

[0014] In some embodiments, the first sleeve portion includes a first fitting portion and a first deformation portion connected to each other. The first fitting portion is connected to the linkage portion, the first deformation portion is connected to the second sleeve portion, and the first fitting portion is in contact with the output shaft; wherein, there is a gap between the first deformation portion and the output shaft, or, the first deformation portion is formed with a plurality of wrinkles arranged along the axial direction of the output shaft, or, the thickness of the first deformation portion is less than the thickness of the first fitting portion.

[0015] In some embodiments, the inner diameter of the first fitting portion in the natural state is less than or equal to the diameter of the output shaft, so that the first fitting portion is in interference fit with the output shaft when sleeved on the output shaft.

[0016] In some embodiments, a protrusion is provided on the surface of the first fitting portion close to the output shaft, and the first fitting portion abuts against the output shaft through the protrusion, so that the first fitting portion is in close contact with the output shaft.

[0017] In some embodiments, the oral cleaning appliance further includes a restraint member sleeved on the second sleeve portion. The restraint member is used to apply a binding force to the second sleeve portion so that the second sleeve portion is in close contact with the output shaft.

[0018] In some embodiments, a limit protrusion is provided on one of the second sleeve portion and the output shaft, and a limit groove matching with the limit protrusion is provided on the other.

[0019] In some embodiments, the linkage portion includes a second deformation portion and a second fitting portion that are connected to each other. The second deformation portion is connected to the socket portion, the second fitting portion is connected to the clamping portion, and the second fitting portion abuts against the hole wall of the shaft hole.

[0020] In some embodiments, the depth of the shaft hole is greater than or equal to 3 mm and less than or equal to 10 mm.

[0021] In some embodiments, the oral cleaning appliance further includes a limiting plate. The limiting plate is connected to the mounting bracket, and at least a part of the limiting plate extends into the shaft hole and is located between the second fitting portion and the socket portion. There is a gap between one end of the limiting plate away from the mounting bracket and the second deformation portion, and the gap provides a moving space for the second deformation portion so that the second deformation portion can deform.

[0022] In some embodiments, there is a gap between the limiting plate and the socket portion, and the size of the gap between the limiting plate and the socket portion is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0023] In some embodiments, there is a gap between the limiting plate and the second fitting portion, and the size of the gap between the limiting plate and the socket portion is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0024] In some embodiments, the limiting plate abuts against the second fitting portion, and a part of the second fitting portion is clamped between the limiting plate and the hole wall of the shaft hole.

[0025] In some embodiments, the length of the part of the limiting plate extending into the shaft hole is greater than half of the depth of the shaft hole.

[0026] In some embodiments, the first seal includes a socket portion, a linkage portion, and a clamping portion that are connected in sequence. The socket portion is sleeved on the output shaft, and the clamping portion is clamped between the mounting bracket and the handle housing. There is a gap between one side of the mounting bracket close to the shaft hole and the socket portion, and the gap is greater than the movement range of the output shaft along its own axis direction. Alternatively, the mounting bracket is formed with a through hole, the output shaft passes through the through hole, and the diameter of the through hole is greater than the outer diameter of the socket portion.

[0027] In some embodiments, the first seal includes a socket part, a linkage part and a clamping part connected in sequence. The socket part is sleeved on the output shaft, and the clamping part is clamped between the mounting bracket and the handle housing; the mounting bracket is formed with a through hole, the output shaft passes through the through hole, and the diameter of the through hole is smaller than the outer diameter of the linkage part; an extension plate is formed on the inner wall of the handle housing, the extension plate surrounds the shaft hole, and the extension plate defines a groove communicating with the shaft hole; at least a part of the clamping part is clamped between the extension plate and the mounting bracket.

[0028] In some embodiments, the oral cleaning appliance further includes a limiting structure for limiting the output shaft to rotate reciprocally between a first position and a second position about its own axis.

[0029] In some embodiments, during the process of the output shaft rotating from the first position to the second position, the turned angle is greater than or equal to 3° and less than or equal to 70°.

[0030] In some embodiments, the drive assembly is a motor, the motor includes a stator and a rotor, and the output shaft is connected to the rotor; the limiting structure is installed between the rotor and the stator, or the limiting structure is installed between the rotor and the handle housing, or the limiting structure is installed between the rotor and the mounting bracket.

[0031] In some embodiments, the motor further includes a bearing and an elastic sheet, the bearing and the stator are connected by the elastic sheet, and the output shaft is rotationally fitted with the bearing.

[0032] In some embodiments, the clearance dimension between the output shaft and the pore wall of the shaft hole is greater than or equal to 2 mm. Description of the Drawings

[0033] Figure 1 Schematic structural diagram of the oral cleaning appliance provided by an embodiment of the present application when a brush head is installed;

[0034] Figure 2 Schematic structural diagram of the oral cleaning appliance provided by an embodiment of the present application when no brush head is installed;

[0035] Figure 3 Front view of the oral cleaning appliance provided by an embodiment of the present application;

[0036] Figure 4 is Figure 3 Schematic diagram of the A-A cross section in

[0037] Figure 5 is Figure 4 Enlarged schematic diagram of part B in

[0038] Figure 6 Partial cross-sectional schematic view of an oral cleaning appliance provided in another embodiment of the present application;

[0039] Figure 7 Structural schematic view of a first seal provided in an embodiment of the present application;

[0040] Figure 8 Cross-sectional schematic view of a first seal provided in an embodiment of the present application;

[0041] Figure 9 Structural schematic view of a second seal provided in an embodiment of the present application;

[0042] Figure 10 Cross-sectional schematic view of a second seal provided in an embodiment of the present application.

[0043] Description of reference numerals:

[0044] 10. Oral cleaning appliance;

[0045] 100. Handle housing; 101. Accommodating cavity; 102. Shaft hole; 103. Extension plate;

[0046] 200. Movement component assembly;

[0047] 210. Mounting bracket; 211. Bracket main body; 2111. Annular baffle; 212. Clamping portion; 213. Through hole;

[0048] 220. Driving component; 221. Output shaft;

[0049] 300. First seal;

[0050] 310. Socketing portion; 311. First socketing portion; 3111. First fitting portion; 3112. First deformation portion; 312. Second socketing portion;

[0051] 320. Linkage portion; 321. Second deformation portion; 322. Second fitting portion;

[0052] 330. Clamping portion;

[0053] 400. Second seal;

[0054] 410. Base portion;

[0055] 420. Y-shaped lip edge;

[0056] 500. Restraining member;

[0057] 600. Limiting plate;

[0058] 700. Brush head. Detailed implementation manners

[0059] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0060] In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0061] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0062] In the description of the present application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. It may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0063] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation manner.

[0064] An oral cleaning appliance in the related art includes a handle housing and a movement mechanism assembly disposed within the handle housing. Among them, the movement mechanism assembly includes a drive assembly having an output shaft, and the output shaft passes through a shaft hole provided at one end of the handle housing. Taking an electric toothbrush as an example, a partial structure of the output shaft passes through the shaft hole of the handle housing and is used to connect to a brush head, so as to drive the brush head to move.

[0065] Generally, an oral cleaning appliance is provided with a seal to seal the gap between the output shaft and the hole wall of the shaft hole, so as to prevent external liquid from entering the handle housing and further protect the movement mechanism assembly. However, when the output shaft moves along its own axis, the seal will be axially pulled, thereby affecting the sealing performance of the seal, and there is a risk of liquid entering the interior of the handle housing. Once the liquid entering the handle housing comes into contact with the drive assembly, it is likely to cause a failure of the drive assembly, thereby affecting the working reliability of the oral cleaning appliance.

[0066] Based on the above situation, the present application provides an oral cleaning appliance, aiming to reduce the risk of the drive assembly coming into contact with liquid and improve the working reliability of the oral cleaning appliance.

[0067] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, the oral cleaning appliance 10 provided by the embodiment of the present application includes a handle housing 100, a movement mechanism assembly 200, a first seal 300 and a second seal 400. The handle housing 100 has a receiving cavity 101 and a shaft hole 102 communicating with the receiving cavity 101. The movement mechanism assembly 200 includes a mounting bracket 210 and a drive assembly 220. The mounting bracket 210 is located within the receiving cavity 101 and fixed to the handle housing 100. The drive assembly 220 is fixed to the mounting bracket 210 and has an output shaft 221. The output shaft 221 can reciprocally rotate about its own axis and telescopically move along its own axis. The output shaft 221 passes through the shaft hole 102. At least a part of the first seal 300 is located between the hole wall of the shaft hole 102 and the output shaft 221, and is used to seal the gap between the output shaft 221 and the hole wall. The second seal 400 is located between the output shaft 221 and the mounting bracket 210, and is used to seal the gap between the output shaft 221 and the mounting bracket 210.

[0068] Specifically, the handle housing 100 can be held by a user, that is to say, the user can hold the handle housing 100 during the process of oral cleaning. Therefore, the handle housing 100 can be set as a cylindrical structure with a certain length, so that the handle housing 100 can be more easily grasped by the user.

[0069] The handle housing 100 has a receiving cavity 101 and a shaft hole 102 communicating with the receiving cavity 101. The receiving cavity 101 can be understood as the device cavity of the oral cleaning appliance 10, which is used to accommodate various functional devices of the oral cleaning appliance 10, such as the movement assembly 200, the circuit board, the battery assembly, etc. The shaft hole 102 is used to enable the output shaft 221 of the driving assembly 220 to extend out of the receiving cavity 101.

[0070] The mounting bracket 210 is mainly used for the mounting and fixing of the driving assembly 220 in the receiving cavity 101. The driving assembly 220 is fixedly connected to the mounting bracket 210, and the mounting bracket 210 is fixedly connected to the handle housing 100, thereby realizing a stable connection between the driving assembly 220 and the handle housing 100. In addition, the mounting bracket 210 can also be used for the mounting and fixing of other functional devices. For example, the battery assembly, the circuit board, etc. can also be fixedly connected to the mounting bracket 210.

[0071] The output shaft 221 of the driving assembly 220 can reciprocally rotate around its own axis and telescopically move along its own axis direction. Taking an electric toothbrush as an example, the part of the output shaft 221 extending out of the receiving cavity 101 can be connected to the brush head 700. In this way, the driving assembly 220 can drive the brush head 700 to vibrate through the output shaft 221.

[0072] In the oral cleaning appliance 10 of the embodiment of the present application, a first seal 300 and a second seal 400 are provided. At least part of the first seal 300 is located between the hole wall of the shaft hole 102 and the output shaft 221 to seal the gap between the output shaft 221 and the hole wall. The second seal 400 is located between the output shaft 221 and the mounting bracket 210 to seal the gap between the output shaft 221 and the mounting bracket 210. In this way, a double-sealing effect is formed at the position where the output shaft 221 is located. Among them, the first seal 300 forms the first sealing structure, which is mainly used to prevent external liquid from entering the receiving cavity 101 through the gap between the output shaft 221 and the hole wall of the shaft hole 102. Since the output shaft 221 is a moving part, during the movement of the output shaft 221, the first seal 300 will be pulled by the output shaft 221, so its sealing performance may be affected. And the second seal 400 forms the second sealing structure, which enables even if part of the liquid enters the receiving cavity 101 from the gap between the output shaft 221 and the first seal 300, the second seal 400 can intercept this part of the liquid outside the mounting bracket 210, so that this part of the liquid will not enter the position where the driving assembly 220 is located through the gap between the output shaft 221 and the mounting bracket 210. In this way, the risk of contact between the driving assembly 220 and the liquid can be avoided, and thus, the working reliability of the oral cleaning appliance 10 can be improved.

[0073] In some embodiments, such as Figure 4 、Figure 5 As shown, the mounting bracket 210 includes a bracket body 211 and a clamping portion 212 connected to the bracket body 211. The bracket body 211 is fixed to the handle housing 100, and the clamping portion 212 is located at one end of the bracket body 211 close to the shaft hole 102. The clamping portion 212 and the bracket body 211 jointly define an installation space, and the second seal 400 is arranged in the installation space so that the second seal 400 is limited in the axial direction of the output shaft 221 by the clamping portion 212 and the bracket body 211, and is limited in the radial direction of the output shaft 221 by the clamping portion 212 and the output shaft 221. The second seal 400 is used to seal the gap between the clamping portion 212 and the output shaft 221.

[0074] The mounting bracket 210 includes a bracket body 211 and a clamping portion 212. The bracket body 211 is used to mount and fix the drive assembly 220. That is to say, the drive assembly 220 is fixedly connected to the bracket body 211. The clamping portion 212 and the bracket body 211 jointly define an installation space, and the second seal 400 is arranged in the installation space so that the second seal 400 is limited in both the axial direction and the radial direction of the output shaft 221. In this way, the position stability of the second seal 400 can be improved, so that the second seal 400 can play a sealing role more stably. In particular, during the movement of the output shaft 221 along its own axis, the second seal 400 can be made not to move with the output shaft 221 and always remain in place, thereby effectively playing a sealing role.

[0075] Furthermore, the second seal 400 is compressed in both the axial direction of the output shaft 221 and the radial direction of the output shaft 221. The compression of the second seal 400 in the radial direction of the output shaft 221 can improve the sealing effect of the gap between the second seal 400 and the output shaft 221 and the clamping portion 212. The compression of the second seal 400 in the axial direction of the output shaft 221 makes the second seal 400 fixed in the axial direction of the output shaft 221, ensuring that the second seal 400 will not generate displacement in the axial direction of the output shaft 221 as the output shaft 221 moves, so as to stably play a sealing role.

[0076] In one of the embodiments, the clamping portion 212 and the bracket body 211 are integrally formed parts. That is to say, during the manufacturing process of the clamping portion 212 and the bracket body 211, an integral structural part is formed by injection molding or other manufacturing methods. In this way, it is beneficial to reduce the manufacturing process and save the manufacturing cost.

[0077] In another embodiment, the clamping portion 212 and the bracket body 211 are integrally formed. Specifically, the clamping portion 212 and the bracket body 211 are manufactured separately during the manufacturing process. An annular baffle 2111 is provided at one end of the bracket body 211 close to the shaft hole 102. The annular baffle 2111 defines an installation groove, and the clamping portion 212 is radially limited in the installation groove. The clamping portion 212 is adhesively bonded to the inner wall of the installation groove by glue, or the clamping portion 212 is in interference fit with the inner wall of the installation groove. That is to say, the clamping portion 212 and the main body portion can also be separately formed and then assembled to connect the clamping portion 212 and the main body portion together. Among them, the clamping portion 212 and the main body portion can be connected by means of glue bonding, interference fit, etc.

[0078] When the clamping portion 212 and the main body portion are adhesively bonded with glue, the annular baffle 2111 can be used to pre-position the clamping portion 212. In this way, during the curing process of the glue, the clamping portion 212 can be prevented from moving relative to the main body portion, thereby improving the assembly accuracy.

[0079] In some embodiments, such as Figure 5 , Figure 8 and Figure 9 shown, the second seal 400 is a Y-shaped seal ring. The Y-shaped seal ring includes a base portion 410 and a Y-shaped lip portion 420 connected to the base portion 410. When the second seal 400 is in a compressed state, the deformation amount of the Y-shaped lip portion 420 is larger than that of the base portion 410. That is to say, the sealing effect at the position where the Y-shaped lip portion 420 is located is better.

[0080] In one implementation manner, the base portion 410 and the Y-shaped lip portion 420 are arranged along the axial direction of the output shaft 221, and the Y-shaped lip portion 420 is located on the side of the base portion 410 close to the shaft hole 102. In this way, it is beneficial to better intercept the liquid outside the mounting bracket 210 and prevent the liquid from entering the gap between the second seal 400 and the output shaft 221.

[0081] In one implementation manner, the base portion 410 and the Y-shaped lip portion 420 are arranged along the radial direction of the output shaft 221, and the Y-shaped lip portion 420 is located on the side of the base portion 410 close to the output shaft 221. Similarly, with such a setting, it is beneficial to better intercept the liquid outside the mounting bracket 210 and prevent the liquid from entering the gap between the second seal 400 and the output shaft 221.

[0082] In some embodiments, such as Figure 5 , Figure 7 and Figure 8As shown, the first seal 300 includes a socket part 310, a linkage part 320, and a clamping part 330 that are connected in sequence. The socket part 310 is sleeved on the output shaft 221, and the clamping part 330 is clamped between the mounting bracket 210 and the handle housing 100. The socket part 310 includes a first socket part 311 and a second socket part 312. The first socket part 311 is connected to the linkage part 320, and the second socket part 312 is connected to the first socket part 311. Among them, the binding force between the first socket part 311 and the output shaft 221 is less than the binding force between the second socket part 312 and the output shaft 221.

[0083] The first seal 300 includes a socket part 310. The socket part 310 is the part of the first seal 300 that is sleeved on the output shaft 221. The socket part 310 is sleeved on the output shaft 221 and has a binding force with the output shaft 221 to make the socket part 310 and the output shaft 221 have sealing performance. Among them, the socket part includes a first socket part 311 and a second socket part 312 that are connected to each other. The binding force between the second socket part 312 and the output shaft 221 is greater than the binding force between the first socket part 311 and the output shaft 221. In this way, during the movement of the output shaft 221 along its own axis direction, the second socket part 312 can better follow the movement of the output shaft 221, avoiding the axial movement of the second socket part 312 relative to the output shaft 221, which is beneficial to making the sealing performance between the second socket part 312 and the output shaft 221 not affected by the movement of the output shaft 221.

[0084] In addition, the binding force between the first socket part 311 and the output shaft 221 is relatively small. During the movement of the output shaft 221 along its own axis direction, the first socket part 311 can deform to reduce the pulling of the first socket part 311 on the second socket part 312, which is beneficial to making the second socket part 312 maintain the position stability relative to the output shaft 221.

[0085] The first seal 300 further includes a clamping part 330 and a linkage part 320. The clamping part 330 is clamped between the mounting bracket 210 and the handle housing 100, and the linkage part 320 is the part between the clamping part 330 and the socket part 310. Among them, because the clamping part 330 is clamped between the mounting bracket 210 and the handle housing 100, the clamping part 330 is fixed relative to the mounting bracket 210. During the movement of the output shaft 221 along its own axis direction, the clamping part 330 does not move with the output shaft 221, which makes at least part of the linkage part 320 keep in contact with the hole wall of the shaft hole 102, so that a better sealing performance is maintained between the first seal 300 and the hole wall of the shaft hole 102.

[0086] In one of the embodiments, as Figure 5 、 Figure 7 and Figure 8As shown, the first set part 311 includes a first fitting part 3111 and a first deformation part 3112 that are connected to each other. The first fitting part 3111 is connected to the linkage part 320, and the first deformation part 3112 is connected to the second set part 312. The first fitting part 3111 is in contact with the output shaft 221.

[0087] The first fitting part 3111 is mainly used to keep in contact with the output shaft 221, and the first deformation part 3112 is mainly used to generate deformation to reduce the drag of the first set part 311 on the second set part 312 during the movement of the output shaft 221. Therefore, the first deformation part 3112 needs to be constructed into a structure or form that is easy to deform. Exemplarily, a gap can be left between the first deformation part 3112 and the output shaft 221 so that there is no direct constraint between the first deformation part 3112 and the output shaft 221. Or, the first deformation part 3112 is formed with a plurality of folds arranged along the axis direction of the output shaft 221. Or, the thickness of the first deformation part 3112 is less than the thickness of the first fitting part 3111. The above setting methods can all make the first deformation part 3112 easier to deform than the first fitting part 3111, thus meeting the setting requirements of the first deformation part 3112.

[0088] In addition, since the first fitting part 3111 is in contact with the output shaft 221, there is also a certain degree of sealing between the first fitting part 3111 and the output shaft 221. Since there is a sealing effect between the second set part 312, the first fitting part 3111 and the output shaft 221, a double-sealing structure is formed between the socket part 310 and the output shaft 221. Thus, the sealing performance between the socket part 310 and the output shaft 221 can be improved.

[0089] Furthermore, the inner diameter of the first fitting part 3111 in the natural state is less than or equal to the diameter of the output shaft 221 so that the first fitting part 3111 is in interference fit with the output shaft 221 when sleeved on the output shaft 221. That is to say, in the state where the first seal 300 has not been assembled with the output shaft 221, the inner diameter of the first fitting part 3111 is less than or equal to the diameter of the output shaft 221. Therefore, when the first seal 300 is assembled with the output shaft 221, the first fitting part 3111 must be in an interference fit state with the output shaft 221. In this way, a good sealing performance can be achieved between the first fitting part 3111 and the output shaft 221.

[0090] Furthermore, a convex part (not shown in the figure) is provided on the surface of the first fitting part 3111 close to the output shaft 221. The first fitting part 3111 abuts against the output shaft 221 through the convex part so that the first fitting part 3111 is in close contact with the output shaft 221. The convex part can be in closer contact with the output shaft 221, thereby improving the sealing performance between the first fitting part 3111 and the output shaft 221.

[0091] In one embodiment, as Figure 6 shown, the oral cleaning appliance 10 further includes a restraint member 500. The restraint member 500 is sleeved on the second sleeve portion 312. The restraint member 500 is configured to apply a binding force to the second sleeve portion 312 so that the second sleeve portion 312 is in close contact with the output shaft 221. Exemplarily, the restraint member 500 can be a tightening structure, such as a zip tie, a strap, etc.

[0092] The provision of the restraint member 500 can enhance the binding force between the second sleeve portion 312 and the output shaft 221. Thus, when the output shaft 221 moves along its own axial direction, the second sleeve portion 312 can better follow the movement of the output shaft 221, and further maintain a good seal between the second sleeve portion 312 and the output shaft 221.

[0093] In one embodiment, a limiting protrusion is provided on one of the second sleeve portion 312 and the output shaft 221, and a limiting groove cooperating with the limiting protrusion is provided on the other. Through the cooperation of the limiting protrusion and the limiting groove, the followability between the second sleeve portion 312 and the output shaft 221 can be improved, such that when the output shaft 221 moves along its own axial direction, the second sleeve portion 312 can better follow the movement of the output shaft 221, and further maintain a good seal between the second sleeve portion 312 and the output shaft 221.

[0094] In some embodiments, as Figure 5 , Figure 7 and Figure 8 shown, the linkage portion 320 includes a second deformation portion 321 and a second fitting portion 322 that are connected to each other. The second deformation portion 321 is connected to the socket portion 310, and the second fitting portion 322 is connected to the clamping portion 330. The second fitting portion 322 abuts against the hole wall of the shaft hole 102.

[0095] The second fitting portion 322 is mainly configured to fit with the hole wall of the shaft hole 102. The second fitting portion 322 is connected to the clamping portion 330. Since the clamping portion 330 is clamped between the mounting bracket 210 and the handle housing 100, the second fitting portion 322 can better fit with the hole wall of the shaft hole 102, so as to maintain a good seal between the first seal 300 and the hole wall of the shaft hole 102. The second deformation portion 321 is connected between the second fitting portion 322 and the socket portion 310. During the movement of the output shaft 221 along its own axial direction, the second deformation portion 321 deforms to adapt to the position change of the socket portion 310. In this way, it is beneficial to keep the second fitting portion 322 in a fitting state with the hole wall of the shaft hole 102 during the movement of the output shaft 221 along its own axial direction.

[0096] Of course, it should be noted that during the movement of the output shaft 221 along its own axial direction, under the pulling action of the second deformation portion 321, the second fitting portion 322 may also undergo a certain degree of deformation. For example, a part of the second fitting portion 322 moves closer to the direction where the output shaft 221 is located.

[0097] In one of the embodiments, the hole depth of the shaft hole 102 is greater than or equal to 3 mm and less than or equal to 10 mm. If the hole depth of the shaft hole 102 is too small, the fitting degree between the second fitting portion 322 and the hole wall of the shaft hole 102 will be affected under the pulling action of the second deformation portion 321, thereby affecting the sealing performance between the second fitting portion 322 and the hole wall. If the hole depth of the shaft hole 102 is too large, with the volume of the accommodation cavity 101 remaining unchanged, the length of the handle shell 100 will increase significantly, thereby increasing the manufacturing cost. After a large number of tests and verifications by the applicant, it is found that when the hole depth of the shaft hole 102 is greater than or equal to 3 mm and less than or equal to 10 mm, it can not only ensure good sealing performance between the second fitting portion 322 and the hole wall, but also will not cause a significant increase in the length of the handle shell 100, which is beneficial to controlling the manufacturing cost.

[0098] In some embodiments, as Figure 5 shown, the oral cleaning appliance 10 further includes a limiting plate 600. The limiting plate 600 is connected to the mounting bracket 210. At least a part of the limiting plate 600 extends into the shaft hole 102 and is located between the second fitting portion 322 and the socket portion 310. There is a gap between the end of the limiting plate 600 away from the mounting bracket 210 and the second deformation portion 321. This gap provides a movement space for the second deformation portion 321, so that the second deformation portion 321 can generate deformation.

[0099] At least a part of the limiting plate 600 extends into the shaft hole 102 and there is a gap between the end of the limiting plate 600 and the second deformation portion. This gap can provide a movement space for the second deformation portion 321, thus not affecting the deformation of the second deformation portion 321. In addition, the limiting plate 600 can play a limiting role on the second deformation portion 321 to prevent the second deformation portion 321 from indenting towards the accommodation cavity 101. In addition, the limiting plate 600 also has a limiting effect on the second fitting portion 322 and the socket portion 310, which is beneficial to avoiding the second fitting portion 322 moving closer to the direction where the output shaft 221 is located and affecting the sealing performance between the second fitting portion 322 and the hole wall of the shaft hole 102, and is also beneficial to avoiding the socket portion 310 expanding away from the direction where the output shaft 221 is located and affecting the sealing performance between the socket portion 310 and the output shaft 221.

[0100] In one embodiment, there is a gap between the limiting plate 600 and the socket part 310, and the size of the gap between the limiting plate 600 and the socket part 310 is greater than or equal to 0.2 mm and less than or equal to 1 mm. There is a gap between the limiting plate 600 and the socket part 310, so that friction between the socket part 310 and the limiting plate 600 can be avoided. If the above gap is too small, it is still difficult to avoid mutual friction. If the above gap is too large, it is difficult for the limiting plate 600 to effectively play a role in restricting the socket part 310. In this embodiment, the size of the gap between the limiting plate 600 and the socket part 310 is greater than or equal to 0.2 mm and less than or equal to 1 mm, which can not only avoid friction between the socket part 310 and the limiting plate 600, but also enable the limiting plate 600 to effectively play a role in restricting the socket part 310 to ensure the sealing performance between the second fitting part 322 and the hole wall of the shaft hole 102.

[0101] In one embodiment, there is a gap between the limiting plate 600 and the second fitting part 322, and the size of the gap between the limiting plate 600 and the socket part 310 is greater than or equal to 0.2 mm and less than or equal to 1 mm. There is a gap between the limiting plate 600 and the second fitting part 322, so that friction between the second fitting part 322 and the limiting plate 600 can be avoided. If the above gap is too small, it is still difficult to avoid mutual friction. If the above gap is too large, it is difficult for the limiting plate 600 to effectively play a role in restricting the second fitting part 322. In this embodiment, the size of the gap between the limiting plate 600 and the second fitting part 322 is greater than or equal to 0.2 mm and less than or equal to 1 mm, which can not only avoid friction between the second fitting part 322 and the limiting plate 600, but also enable the limiting plate 600 to effectively play a role in restricting the second fitting part 322 to ensure the sealing performance between the second fitting part 322 and the hole wall of the shaft hole 102.

[0102] In another embodiment, the limiting plate 600 abuts against the second fitting part 322, and a part of the second fitting part 322 is clamped between the limiting plate 600 and the hole wall of the shaft hole 102. That is to say, the limiting plate 600 can also be used to clamp the second fitting part 322. In this case, it can be ensured that the second fitting part 322 is always in contact with the hole wall of the shaft hole 102, and further, a good sealing performance is always maintained between the second fitting part 322 and the hole wall.

[0103] Further, the length of the part of the limiting plate 600 extending into the shaft hole 102 is greater than half of the depth of the shaft hole 102. So as to enable the limiting plate 600 to effectively play a role in restricting the second deformation part 321, the second fitting part 322 and the socket part 310.

[0104] In some embodiments, such as 4, Figure 5As shown, the first seal 300 includes a socket part 310, a linkage part 320, and a clamping part 330 that are connected in sequence. The socket part 310 is sleeved on the output shaft 221, and the clamping part 330 is clamped between the mounting bracket 210 and the handle housing 100. There is a gap between the side of the mounting bracket 210 close to the shaft hole 102 and the socket part 310, and the gap is greater than the movement range of the output shaft 221 along its own axis direction. Or, the mounting bracket 210 is formed with a through hole 213, the output shaft 221 passes through the through hole 213, and the diameter of the through hole 213 is greater than the outer diameter of the socket part 310.

[0105] During the process of the output shaft 221 moving along its own axis direction, the socket part 310 will move along with the output shaft 221. If the socket part 310 interferes with the mounting bracket 210 during the movement, it is easy to cause the socket part 310 to axially move relative to the output shaft 221, thereby affecting the sealing performance between the socket part 310 and the output shaft 221.

[0106] To avoid the above problems, a gap can be maintained between the mounting bracket 210 and the socket part 310, and this gap should be greater than the movement range of the output shaft 221 along its own axis direction. In this way, the problem that the socket part 310 interferes with the mounting bracket 210 during movement can be avoided.

[0107] Or, a through hole 213 for the output shaft 221 to pass through can be provided on the mounting bracket 210, and the diameter of the through hole 213 is greater than the outer diameter of the socket part 310. In this way, even if the socket part 310 moves to the position where the mounting bracket 210 is located, it will enter the through hole 213 and avoid contacting the mounting bracket 210. Thus, the problem that the socket part 310 interferes with the mounting bracket 210 during movement can be avoided.

[0108] In some embodiments, as Figure 4 、 Figure 5 shown, the first seal 300 includes a socket part 310, a linkage part 320, and a clamping part 330 that are connected in sequence. The socket part 310 is sleeved on the output shaft 221, and the clamping part 330 is clamped between the mounting bracket 210 and the handle housing 100. The mounting bracket 210 is formed with a through hole 213, the output shaft 221 passes through the through hole 213, and the diameter of the through hole 213 is smaller than the outer diameter of the linkage part 320. An extension plate 103 is formed on the inner wall of the handle housing 100. The extension plate 103 is arranged around the shaft hole 102, and the extension plate 103 defines a groove communicating with the shaft hole 102. At least part of the clamping part 330 is clamped between the extension plate 103 and the mounting bracket 210.

[0109] An extension plate 103 is formed on the inner wall of the handle housing 100. At least part of the clamping portion 330 of the first seal 300 is clamped between the extension plate 103 and the mounting bracket 210. By providing the extension plate 103, the clamping portion 330 can be clamped at a more appropriate position. Compared with the case of clamping the clamping portion 330 using the inner wall of the handle housing 100, it is beneficial to reduce the radial dimension of the first seal 300.

[0110] In addition, the aperture of the through hole 213 on the mounting bracket 210 through which the output shaft 221 passes is smaller than the outer diameter of the linkage portion 320. In this way, it is beneficial to control the radial dimension of the first seal 300. This is because if the aperture of the through hole 213 is larger than the outer diameter of the linkage portion 320, it will cause a significant increase in the radial dimension of the clamping portion 330, and thus a significant increase in the radial dimension of the first seal 300.

[0111] In some embodiments, the oral cleaning appliance 10 further includes a limiting structure for limiting the output shaft 221 to reciprocally rotate about its own axis between a first position and a second position. By providing the limiting structure, it is beneficial to prevent the output shaft 221 from rotating too large an angle and causing excessive pulling on the first seal 300, so as to avoid structural damage to the first seal 300 and affecting the sealing performance.

[0112] Further, during the process of the output shaft 221 rotating from the first position to the second position, the rotated angle is greater than or equal to 3° and less than or equal to 70°. That is to say, under the limiting action of the limiting structure, the angle rotated by the output shaft 221 during the process of rotating from the first position to the second position is between 3° and 70°. Such a setting is beneficial to prevent the output shaft 221 from rotating too large an angle and causing excessive pulling on the first seal 300, thereby avoiding structural damage to the first seal 300 and affecting the sealing performance.

[0113] It can be understood that during the process of the output shaft 221 rotating from the second position to the first position, the rotated angle is also greater than or equal to 3° and less than or equal to 70°.

[0114] Further, the drive assembly 220 is a motor, and the motor includes a stator and a rotor. Among them, the output shaft 221 is connected to the rotor. There are various choices for the installation position of the limiting structure. For example, the limiting structure can be installed between the rotor and the stator, or the limiting structure is installed between the rotor and the handle housing 100, or the limiting structure is installed between the rotor and the mounting bracket 210.

[0115] In one of the embodiments, the motor further includes a bearing and an elastic sheet. The bearing and the stator are connected through the elastic sheet, and the output shaft 221 is rotationally fitted with the bearing.

[0116] With such a setting, by utilizing the elasticity provided by the elastic sheet, the output shaft 221 can move in its own axial direction and be reset during the movement.

[0117] Further, the clearance dimension between the output shaft 221 and the hole wall of the shaft hole 102 is greater than or equal to 2 mm. Since the elastic sheet has elasticity, this may cause the output shaft 221 to shake. In the case where the clearance dimension between the output shaft 221 and the hole wall of the shaft hole 102 is greater than or equal to 2 mm, it can be ensured that the output shaft 221 will not contact the hole wall of the shaft hole 102 during shaking, thereby reducing the generation of noise.

[0118] The above content is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An oral cleaning appliance, characterized in that, Comprising: A handle shell having a receiving cavity and a shaft hole communicating with the receiving cavity; A movement assembly including a mounting bracket and a driving assembly. The mounting bracket is located within the receiving cavity and fixed to the handle shell. The driving assembly is fixed to the mounting bracket and has an output shaft that can reciprocally rotate about its own axis and telescopically move along its own axis direction. The output shaft passes through the shaft hole; A first seal, at least partially located between the hole wall of the shaft hole and the output shaft, for sealing the gap between the output shaft and the hole wall; And A second seal, located between the output shaft and the mounting bracket, for sealing the gap between the output shaft and the mounting bracket.

2. The oral cleaning appliance according to claim 1, characterized in that, The mounting bracket includes a bracket main body and a clamping portion connected to the bracket main body. The bracket main body is fixed to the handle shell, and the clamping portion is located at one end of the bracket main body close to the shaft hole; The clamping portion and the bracket main body jointly define an installation space, and the second seal is disposed within the installation space so that the second seal is limited in the axial direction of the output shaft by the clamping portion and the bracket main body, and is limited in the radial direction of the output shaft by the clamping portion and the output shaft; The second seal is used to seal the gap between the clamping portion and the output shaft.

3. The oral cleaning appliance according to claim 2, wherein The second seal is compressed both in the axial direction of the output shaft and in the radial direction of the output shaft.

4. The oral cleaning appliance according to claim 2, characterized in that, The clamping portion and the bracket main body are integrally formed.

5. The oral cleaning appliance according to claim 2, characterized in that, The clamping portion and the bracket main body are separately formed; An annular baffle is provided at one end of the bracket main body close to the shaft hole. The annular baffle defines an installation groove, and the clamping portion is limited in the radial direction of the output shaft within the installation groove; The clamping portion is adhesively bonded to the inner wall of the installation groove by glue, or the clamping portion is in interference fit with the inner wall of the installation groove.

6. The oral cleaning appliance according to claim 1, characterized in that, The second seal is a Y-shaped sealing ring, and the Y-shaped sealing ring includes a base portion and a Y-shaped lip portion connected to the base portion; Wherein, the base portion and the Y-shaped lip portion are arranged along the axial direction of the output shaft, and the Y-shaped lip portion is located on the side of the base portion close to the shaft hole, or the base portion and the Y-shaped lip portion are arranged along the radial direction of the output shaft, and the Y-shaped lip portion is located on the side of the base portion close to the output shaft.

7. The oral cleaning appliance according to claim 1, characterized in that, The first seal includes a socket portion, a linkage portion, and a clamping portion connected in sequence. The socket portion is sleeved on the output shaft, and the clamping portion is clamped between the mounting bracket and the handle shell; The socket portion includes a first sleeve portion and a second sleeve portion. The first sleeve portion is connected to the linkage portion, and the second sleeve portion is connected to the first sleeve portion; Wherein, the binding force between the first sleeve portion and the output shaft is less than the binding force between the second sleeve portion and the output shaft.

8. The oral cleaning appliance according to claim 7, wherein The first sleeve portion includes a first fitting portion and a first deformation portion connected to each other. The first fitting portion is connected to the linkage portion, the first deformation portion is connected to the second sleeve portion, and the first fitting portion is in contact with the output shaft; Wherein, a gap is left between the first deformation part and the output shaft, or, the first deformation part is formed with a plurality of folds arranged along the axial direction of the output shaft, or, the thickness of the first deformation part is less than the thickness of the first fitting part.

9. The oral cleaning appliance according to claim 8, characterized in that, The inner diameter of the first fitting part in the natural state is less than or equal to the diameter of the output shaft, so that the first fitting part is in interference fit with the output shaft when sleeved on the output shaft; And / or, a protrusion is provided on the surface of the first fitting part close to the output shaft, and the first fitting part abuts against the output shaft through the protrusion, so that the first fitting part is closely attached to the output shaft.

10. The oral cleaning appliance according to claim 7, characterized in that, The oral cleaning appliance further includes a restraint member sleeved on the second sleeve portion, and the restraint member is used to apply a restraining force to the second sleeve portion so that the second sleeve portion is closely abutted against the output shaft.

11. The oral cleaning appliance according to claim 7, characterized in that, A limiting protrusion is provided on one of the second sleeve portion and the output shaft, and a limiting groove matching with the limiting protrusion is provided on the other.

12. The oral cleaning appliance according to claim 7, wherein, The linkage portion includes a second deformation part and a second fitting part connected to each other. The second deformation part is connected to the socket portion, the second fitting part is connected to the clamping part, and the second fitting part abuts against the hole wall of the shaft hole.

13. The oral cleaning appliance according to claim 12, wherein, The depth of the shaft hole is greater than or equal to 3 mm and less than or equal to 10 mm.

14. The oral cleaning appliance according to claim 12, characterized in that, The oral cleaning appliance further includes a limiting plate connected to the mounting bracket. At least part of the limiting plate extends into the shaft hole and is located between the second fitting part and the socket portion; A spacing is left between the end of the limiting plate away from the mounting bracket and the second deformation part, and the gap provides a moving space for the second deformation part so that the second deformation part can generate deformation.

15. The oral cleaning implement according to claim 14, characterized in that, There is a gap between the limiting plate and the socket portion, and the size of the gap between the limiting plate and the socket portion is greater than or equal to 0.2 mm and less than or equal to 1 mm.

16. The oral cleaning implement according to claim 14, characterized in that, There is a gap between the limiting plate and the second fitting part, and the size of the gap between the limiting plate and the socket portion is greater than or equal to 0.2 mm and less than or equal to 1 mm.

17. The oral cleaning appliance according to claim 14, wherein, The limiting plate abuts against the second fitting part, and a part of the second fitting part is clamped between the limiting plate and the hole wall of the shaft hole.

18. The oral cleaning appliance according to claim 14, characterized in that, The length of the part of the limiting plate extending into the shaft hole is greater than half of the depth of the shaft hole.

19. The oral cleaning appliance according to claim 1, wherein, The first seal includes a socket portion, a linkage portion and a clamping portion connected in sequence. The socket portion is sleeved on the output shaft, and the clamping portion is clamped between the mounting bracket and the handle housing; A spacing is formed between the side of the mounting bracket close to the shaft hole and the socket portion, and the spacing is greater than the movement amplitude of the output shaft along its own axis direction, or, the mounting bracket is formed with a through hole, the output shaft passes through the through hole, and the diameter of the through hole is greater than the outer diameter of the socket portion.

20. The oral cleaning appliance according to claim 1, characterized in that, The first seal includes a socket portion, a linkage portion and a clamping portion connected in sequence. The socket portion is sleeved on the output shaft, and the clamping portion is clamped between the mounting bracket and the handle housing; The mounting bracket is formed with a through hole, the output shaft passes through the through hole, and the diameter of the through hole is smaller than the outer diameter of the linkage part; An extension plate is formed on the inner wall of the handle housing, the extension plate is arranged around the shaft hole, and the extension plate defines a groove communicating with the shaft hole; At least a part of the clamping part is clamped between the extension plate and the mounting bracket.

21. The oral cleaning appliance according to claim 1, characterized in that, The oral cleaning appliance further includes a limiting structure for restricting the output shaft from reciprocally rotating around its own axis between a first position and a second position.

22. The oral cleaning appliance according to claim 21, characterized in that, During the process of the output shaft rotating from the first position to the second position, the rotated angle is greater than or equal to 3° and less than or equal to 70°.

23. The oral cleaning appliance according to claim 21, characterized in that, The drive assembly is a motor, the motor includes a stator and a rotor, and the output shaft is connected to the rotor; The limiting structure is installed between the rotor and the stator, or the limiting structure is installed between the rotor and the handle housing, or the limiting structure is installed between the rotor and the mounting bracket.

24. The oral cleaning appliance according to claim 23, wherein, The motor further includes a bearing and an elastic sheet, the bearing and the stator are connected through the elastic sheet, and the output shaft is rotationally matched with the bearing.

25. The oral cleaning appliance according to claim 24, characterized in that, The clearance dimension between the output shaft and the hole wall of the shaft hole is greater than or equal to 2 mm.

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