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, and the output shaft can rotate in a reciprocating mode around the axis of the output shaft and stretch out and draw back in the axis direction of the output shaft and penetrates through the shaft hole; at least part of the 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, the sealing piece comprises a sleeving part, a linkage part and a clamping part which are connected in sequence, the sleeving part sleeves the output shaft, and the clamping part and the sleeving part are arranged in the radial direction of the output shaft at intervals; the clamping part is clamped between the installation support and the handle shell, and when the output shaft moves, at least part of the linkage part is attached to the hole wall of the shaft hole through the fixing effect of the clamping part.

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 inner 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, making it difficult to maintain a tightly fitting state between the seal and the inner wall of the shaft hole, thereby affecting the sealing performance of the seal. Summary of the Utility Model

[0004] This application provides an oral cleaning appliance, aiming to improve the problem that it is difficult to maintain a tightly fitting state between the seal and the inner wall of the shaft hole when the output shaft moves.

[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 about its own axis and telescopically move along its own axis, the output shaft passes through the shaft hole; and a seal, at least partially located between the inner wall of the shaft hole and the output shaft, for sealing the gap between the output shaft and the inner wall, the seal includes a sleeved portion, a linkage portion and a clamping portion connected in sequence, the sleeved portion is sleeved on the output shaft, the clamping portion and the sleeved portion are spaced apart in the radial direction of the output shaft, the clamping portion is clamped between the mounting bracket and the handle housing, and when the output shaft moves, at least a part of the linkage portion is kept in contact with the inner wall of the shaft hole through the fixing action of the clamping portion.

[0007] In the oral cleaning appliance according to the embodiments of the present application, a seal is provided, and the seal is used to seal the gap between the output shaft and the hole wall. Among them, the seal includes a sleeved portion, a linkage portion, and a clamping portion that are connected in sequence. The sleeved portion is the part of the seal that is sleeved on the output shaft. The sleeved portion is sleeved on the output shaft and has a binding force with the output shaft, so that there is a sealing property between the sleeved portion and the output shaft. The clamping portion is clamped between the mounting bracket and the handle housing, and the linkage portion is the part between the clamping portion and the sleeved portion. Since the clamping portion is clamped between the mounting bracket and the handle housing, the clamping portion remains fixed relative to the mounting bracket. During the movement of the output shaft, the clamping portion does not move with the output shaft, which enables at least part of the linkage portion to be in a state of closely fitting with the hole wall of the shaft hole, thereby maintaining a good sealing property between the seal and the hole wall of the shaft hole.

[0008] In some embodiments, the sleeved portion includes a first sleeved part and a second sleeved part. The first sleeved part is connected to the linkage portion, and the second sleeved part is connected to the first sleeved part; wherein, the binding force between the first sleeved part and the output shaft is less than the binding force between the second sleeved part and the output shaft.

[0009] In some embodiments, the first sleeved part includes a first fitting part and a first deforming part that are connected to each other. The first fitting part is connected to the linkage portion, the first deforming part is connected to the second sleeved part, and the first fitting part is in contact with the output shaft; there is a gap between the first deforming part and the output shaft, or, the first deforming part is formed with a plurality of wrinkles arranged along the axial direction of the output shaft, or, the thickness of the first deforming part is less than the thickness of the first fitting part.

[0010] In some embodiments, 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.

[0011] In some embodiments, a raised part 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 raised part, so that the first fitting part is in close contact with the output shaft.

[0012] In some embodiments, a limiting protrusion is provided on one of the second sleeved part and the output shaft, and a limiting groove that cooperates with the limiting protrusion is provided on the other.

[0013] In some embodiments, the linkage portion includes a second deforming part and a second fitting part that are connected to each other. The second deforming part is connected to the sleeved portion, the second fitting part is connected to the clamping portion, and the second fitting part abuts against the hole wall of the shaft hole.

[0014] 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.

[0015] In some embodiments, the oral cleaning appliance further includes a limiting plate, the limiting plate is connected to the mounting bracket, 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.

[0016] In some embodiments, there is a gap between one end of the limiting plate away from the mounting bracket and the second deformable portion, and the gap provides a moving space for the second deformable portion so that the second deformable portion can deform.

[0017] 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; 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.

[0018] In some embodiments, there is a gap between the limiting plate and the socket portion, 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.

[0019] 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.

[0020] In some embodiments, 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 amplitude of the output shaft along its own axis direction.

[0021] In some embodiments, 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.

[0022] In some embodiments, 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 less than the outer diameter of the linkage portion; 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 portion is clamped between the extension plate and the mounting bracket.

[0023] In some embodiments, 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.

[0024] In some embodiments, 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°.

[0025] In some embodiments, the driving 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.

[0026] 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 rotatably fitted with the bearing.

[0027] In some embodiments, the clearance size between the output shaft and the hole wall of the shaft hole is greater than or equal to 2 mm. Description of the Drawings

[0028] Figure 1 Schematic structural diagram of the oral cleaning appliance provided by an embodiment of the present application when a brush head is installed;

[0029] Figure 2 Schematic structural diagram of the oral cleaning appliance provided by an embodiment of the present application when no brush head is installed;

[0030] Figure 3 Front view of the oral cleaning appliance provided by an embodiment of the present application;

[0031] Figure 4 is Figure 3 Schematic diagram of the A-A cross-section in;

[0032] Figure 5 is Figure 4 Enlarged schematic diagram of part B in;

[0033] Figure 6 Schematic structural diagram of the first seal provided by an embodiment of the present application;

[0034] Figure 7 Cross-sectional schematic diagram of the first seal provided by an embodiment of the present application;

[0035] Figure 8 Schematic structural diagram of the limiting plate and the mounting bracket provided by an embodiment of the present application;

[0036] Figure 9 Cross-sectional schematic diagram of the limiting plate and the mounting bracket provided by an embodiment of the present application;

[0037] Figure 10Schematic diagram of a drive component provided by an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 10, oral cleaning appliance;

[0040] 100, handle housing; 101, accommodation cavity; 102, shaft hole; 103, extension plate;

[0041] 200, movement component;

[0042] 210, mounting bracket; 213, through hole;

[0043] 220, drive component; 221, output shaft; 223, stator; 224, rotor; 225, bearing; 226, elastic sheet;

[0044] 300, seal;

[0045] 310, socket part; 311, first socket part; 3111, first fitting part; 3112, first deformation part; 312, second socket part;

[0046] 320, linkage part; 321, second deformation part; 322, second fitting part;

[0047] 330, clamping part;

[0048] 600, limit plate;

[0049] 700, brush head. Detailed implementation manners

[0050] In order to make the objectives, technical solutions and advantages of the present application clearer, 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.

[0051] 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. It 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 accompanying drawings are only 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.

[0052] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In the description of this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it can 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 the purpose of illustration and do not represent the only implementation.

[0055] An oral cleaning appliance in the related art includes a handle housing and a movement component disposed within the handle housing. Among them, the movement component includes a drive component 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 part of the structure of the output shaft passes through the shaft hole of the handle housing and is used to connect to the toothbrush head, so as to drive the toothbrush head to move.

[0056] 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 to prevent external liquid from entering the handle housing and thus protect the movement component. However, when the output shaft moves along its own axis, the seal will be axially pulled, making it difficult to maintain a tightly fitting state between the seal and the hole wall of the shaft hole, thereby affecting the sealing performance of the seal.

[0057] Based on the above situation, this application provides an oral cleaning appliance, aiming to improve the problem that it is difficult to maintain a tightly fitting state between the seal and the hole wall of the shaft hole when the output shaft moves.

[0058] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4and Figure 5 As shown in Figure 5 , the oral cleaning appliance 10 provided by the embodiment of the present application includes a handle housing 100, a movement assembly 200, and a seal 300. The handle housing 100 has a receiving cavity 101 and a shaft hole 102 communicating with the receiving cavity 101. The movement assembly 200 includes a mounting bracket 210 and a driving assembly 220. The mounting bracket 210 is located in the receiving cavity 101 and fixed to the handle housing 100. The driving 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 direction. The output shaft 221 passes through the shaft hole 102. The seal 300 is at least partially located between the hole wall of the shaft hole 102 and the output shaft 221 for sealing the gap between the output shaft 221 and the hole wall. The seal 300 includes a socket part 310, a linkage part 320, and a clamping part 330 connected in sequence. The socket part 310 is sleeved on the output shaft 221. The clamping part 330 and the socket part 310 are arranged at intervals in the radial direction of the output shaft 221. The clamping part 330 is clamped between the mounting bracket 210 and the handle housing 100. When the output shaft 221 moves, at least part of the linkage part 320 is kept in contact with the hole wall of the shaft hole 102 due to the fixing action of the clamping part 330.

[0059] Specifically, the handle housing 100 can be held by the 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.

[0060] 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 for accommodating various functional devices of the oral cleaning appliance 10, such as the movement assembly 200, a circuit board, a 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.

[0061] The mounting bracket 210 is mainly used for the installation and fixation 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 installation and fixation of other functional devices. For example, a battery assembly, a circuit board, etc. can also be fixedly connected to the mounting bracket 210.

[0062] The output shaft 221 of the driving assembly 220 can reciprocally rotate about 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 accommodation 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.

[0063] In the oral cleaning appliance 10 according to the embodiment of the present application, a seal 300 is provided, and the seal 300 is used to seal the gap between the output shaft 221 and the hole wall. Wherein, the seal 300 includes a sleeved portion 310, a linkage portion 320 and a clamping portion 330 that are sequentially connected. The sleeved portion 310 is the part of the seal 300 sleeved on the output shaft 221. The sleeved portion 310 is sleeved on the output shaft 221 and has a binding force with the output shaft 221, so that there is a sealing property between the sleeved portion 310 and the output shaft 221. The clamping portion 330 is clamped between the mounting bracket 210 and the handle housing 100, and the linkage portion 320 is the part between the clamping portion 330 and the sleeved portion 310. Since the clamping portion 330 is clamped between the mounting bracket 210 and the handle housing 100, the clamping portion 330 remains fixed relative to the mounting bracket 210. During the movement of the output shaft 221, the clamping portion 330 does not move with the output shaft 221, which enables at least a part of the linkage portion 320 to be in a state of closely fitting with the hole wall of the shaft hole 102, and further enables a good sealing property to be maintained between the seal 300 and the hole wall of the shaft hole 102.

[0064] In some embodiments, such as Figure 5 、 Figure 6 and Figure 7 shown, the sleeved portion 310 includes a first sleeve portion 311 and a second sleeve portion 312. The first sleeve portion 311 is connected to the linkage portion 320, and the second sleeve portion 312 is connected to the first sleeve portion 311. Wherein, the binding force between the first sleeve portion 311 and the output shaft 221 is less than the binding force between the second sleeve portion 312 and the output shaft 221.

[0065] That is to say, the binding force between the second sleeve portion 312 and the output shaft 221 is greater than the binding force between the first sleeve portion 311 and the output shaft 221. In this way, during the movement of the output shaft 221 along its own axis direction, the second sleeve portion 312 can better follow the movement of the output shaft 221, avoiding the axial movement of the second sleeve portion 312 relative to the output shaft 221, which is beneficial to ensuring that the sealing property between the second sleeve portion 312 and the output shaft 221 is not affected by the movement of the output shaft 221.

[0066] In addition, the binding force between the first sleeve portion 311 and the output shaft 221 is relatively small. During the movement of the output shaft 221 along its own axis, the first sleeve portion 311 can deform to reduce the pulling of the first sleeve portion 311 on the second sleeve portion 312, thereby facilitating the maintenance of the positional stability of the second sleeve portion 312 relative to the output shaft 221.

[0067] In one of the embodiments, as Figure 5 , Figure 6 and Figure 7 shown, the first sleeve portion 311 includes a first fitting portion 3111 and a first deformation portion 3112 that are connected to each other. The first fitting portion 3111 is connected to the linkage portion 320, the first deformation portion 3112 is connected to the second sleeve portion 312, and the first fitting portion 3111 is in contact with the output shaft 221.

[0068] The first fitting portion 3111 is mainly used to keep in contact with the output shaft 221, and the first deformation portion 3112 is mainly used to deform to reduce the pulling of the first sleeve portion 311 on the second sleeve portion 312 during the movement of the output shaft 221. Therefore, the first deformation portion 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 portion 3112 and the output shaft 221 so that there is no direct constraint between the first deformation portion 3112 and the output shaft 221, or the first deformation portion 3112 is formed with a plurality of folds arranged along the axis of the output shaft 221, or the thickness of the first deformation portion 3112 is less than the thickness of the first fitting portion 3111. The above-mentioned setting methods can all make the first deformation portion 3112 more likely to deform than the first fitting portion 3111, thus meeting the setting requirements of the first deformation portion 3112.

[0069] In addition, since the first fitting portion 3111 is in contact with the output shaft 221, there is also a certain degree of sealing between the first fitting portion 3111 and the output shaft 221. Since both the second sleeve portion 312, the first fitting portion 3111 and the output shaft 221 have a sealing effect, a double-sealing structure is formed between the socket portion 310 and the output shaft 221. Thus, the sealing performance between the socket portion 310 and the output shaft 221 can be improved.

[0070] Further, the inner diameter of the first fitting portion 3111 in the natural state is less than or equal to the diameter of the output shaft 221, so that the first fitting portion 3111 is in an interference fit with the output shaft 221 when sleeved on the output shaft 221. That is to say, in the state where the seal 300 has not been assembled with the output shaft 221, the inner diameter of the first fitting portion 3111 is less than or equal to the diameter of the output shaft 221. Therefore, when the seal 300 is assembled with the output shaft 221, the first fitting portion 3111 and the output shaft 221 are necessarily in an interference fit state. In this way, good sealing performance can be achieved between the first fitting portion 3111 and the output shaft 221.

[0071] Further, a convex portion (not shown in the figure) is provided on the surface of the first fitting portion 3111 close to the output shaft 221. The first fitting portion 3111 abuts against the output shaft 221 through the convex portion, so that the first fitting portion 3111 is closely attached to the output shaft 221. The convex portion can be more closely attached to the output shaft 221, thereby improving the sealing performance between the first fitting portion 3111 and the output shaft 221.

[0072] In one of the embodiments, a limiting convex is provided on one of the second sleeve portion 312 and the output shaft 221, and a limiting groove cooperating with the limiting convex is provided on the other. Through the cooperation of the limiting convex and the limiting groove, the followability between the second sleeve portion 312 and the output shaft 221 can be improved, so that when the output shaft 221 moves along its own axis direction, the second sleeve portion 312 can better follow the movement of the output shaft 221, and further maintain good sealing performance between the second sleeve portion 312 and the output shaft 221.

[0073] In some embodiments, such as Figure 5 、 Figure 6 and Figure 7 shown, the linkage portion 320 includes a second deformation portion 321 and a second fitting portion 322 connected to each other. The second deformation portion 321 is connected to the socket portion 310, the second fitting portion 322 is connected to the clamping portion 330, and the second fitting portion 322 abuts against the hole wall of the shaft hole 102.

[0074] The second fitting portion 322 is mainly used 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 that a good sealing property is maintained between the 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 in 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 in its own axial direction.

[0075] Of course, it should be noted that during the movement of the output shaft 221 in 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.

[0076] In one of the embodiments, the depth of the shaft hole 102 is greater than or equal to 3 mm and less than or equal to 10 mm. If the 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 property between the second fitting portion 322 and the hole wall. If the depth of the shaft hole 102 is too large, with the volume of the accommodation cavity 101 remaining unchanged, the length of the handle housing 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 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 property between the second fitting portion 322 and the hole wall, but also will not cause a significant increase in the length of the handle housing 100, which is beneficial to controlling the manufacturing cost.

[0077] In some embodiments, such as Figure 5 、 Figure 8 and Figure 9 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.

[0078] The limiting plate 600 has a limiting effect on the second fitting portion 322 and the socket portion 310, which is beneficial to preventing the second fitting portion 322 from approaching 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 preventing the socket portion 310 from 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.

[0079] The limiting plate 600 is an annular plate. In this way, when the limiting plate 600 extends into the annular space between the second fitting portion 322 and the socket portion 310, the limiting plate 600 can better limit the second fitting portion 322 and the socket portion 310.

[0080] In one embodiment, there is a gap between the limiting plate 600 and the socket portion 310, and the gap size between the limiting plate 600 and the socket portion 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 portion 322, and the gap size between the limiting plate 600 and the second fitting portion 322 is greater than or equal to 0.2 mm and less than or equal to 1 mm.

[0081] There is a gap between the limiting plate 600 and the socket portion 310, so that friction between the socket portion 310 and the limiting plate 600 can be avoided. If the above gap is too small, it is still difficult to avoid the situation of mutual friction. If the above gap is too large, it is difficult for the limiting plate 600 to effectively play a limiting role on the socket portion 310. In this embodiment, the gap size between the limiting plate 600 and the socket portion 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 portion 310 and the limiting plate 600, but also enable the limiting plate 600 to effectively play a limiting role on the socket portion 310 to ensure the sealing performance between the second fitting portion 322 and the hole wall of the shaft hole 102.

[0082] Similarly, there is a gap between the limiting plate 600 and the second fitting portion 322, so that friction between the second fitting portion 322 and the limiting plate 600 can be avoided. If the above gap is too small, it is still difficult to avoid the situation of mutual friction. If the above gap is too large, it is difficult for the limiting plate 600 to effectively play a limiting role on the second fitting portion 322. In this embodiment, the gap size between the limiting plate 600 and the second fitting portion 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 portion 322 and the limiting plate 600, but also enable the limiting plate 600 to effectively play a limiting role on the second fitting portion 322 to ensure the sealing performance between the second fitting portion 322 and the hole wall of the shaft hole 102.

[0083] In another embodiment, there is a gap between the limiting plate 600 and the socket part 310. 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 wall of the shaft hole 102. That is to say, the second fitting part 322 can also be clamped by the limiting plate 600. In this case, it can be ensured that the second fitting part 322 is always in contact with the wall of the shaft hole 102, and thus a good sealing performance can be maintained between the second fitting part 322 and the wall of the hole.

[0084] In one of the embodiments, there is a distance between one end of the limiting plate 600 away from the mounting bracket 210 and the second deformable part 321. This gap provides a movement space for the second deformable part 321 so that the second deformable part 321 can deform.

[0085] At least a part of the limiting plate 600 extends into the shaft hole 102 and there is a distance between the end of the limiting plate 600 and the second deformable part. This distance can provide a movement space for the second deformable part 321, thus not affecting the deformation of the second deformable part 321. In addition, the limiting plate 600 can limit the second deformable part 321 to prevent the second deformable part 321 from being indented towards the accommodating cavity 101.

[0086] In one of the embodiments, 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. This is to facilitate the limiting plate 600 to effectively play a role in restricting the second fitting part 322 and the socket part 310.

[0087] In some embodiments, 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.

[0088] During the movement of the output shaft 221 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, thus affecting the sealing performance between the socket part 310 and the output shaft 221. 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 of interference between the socket part 310 and the mounting bracket 210 during movement can be avoided.

[0089] In some other embodiments, the output shaft 221 passes through the through hole, and the diameter of the through hole is larger than the outer diameter of the socket portion 310. With such a setting, even if the socket portion 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. In this way, the problem that the socket portion 310 interferes with the mounting bracket 210 during movement can also be avoided.

[0090] In some embodiments, as Figure 5 shown, 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 portion 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 portion 330 is clamped between the extension plate 103 and the mounting bracket 210.

[0091] 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 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 by the inner wall of the handle housing 100, it is beneficial to reduce the radial dimension of the seal 300.

[0092] In addition, the diameter of the through hole 213 on the mounting bracket 210 for the output shaft 221 to pass through is smaller than the outer diameter of the linkage portion 320. In this way, it is beneficial to control the radial dimension of the seal 300. This is because if the diameter 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 further cause a significant increase in the radial dimension of the seal 300.

[0093] In some embodiments, the oral cleaning appliance 10 further includes a limiting structure for restricting the output shaft 221 from rotating reciprocally between a first position and a second position about its own axis. By providing the limiting structure, it is beneficial to prevent the output shaft 221 from rotating too large an angle and overstretching the seal 300, so as to avoid structural damage to the seal 300 and affecting the sealing performance.

[0094] Further, when the output shaft 221 rotates 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 from the first position to the second position is between 3° and 70°. With such a setting, it is beneficial to prevent the output shaft 221 from rotating too large an angle and overstretching the seal 300, thereby avoiding structural damage to the seal 300 and affecting the sealing performance.

[0095] 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°.

[0096] Furthermore, as Figure 10 shown, the driving component 220 is a motor, the motor includes a stator 223 and a rotor 224, and the output shaft 221 is connected to the rotor 224. There are various choices for the installation position of the limiting structure. For example, the limiting structure can be installed between the rotor 224 and the stator 223, or the limiting structure is installed between the rotor 224 and the handle housing 100, or the limiting structure is installed between the rotor 224 and the mounting bracket 210.

[0097] Exemplarily, the limiting structure can be a positioning convex block provided on the stator 223. Correspondingly, an abutting portion for cooperating with the positioning convex block can be provided on the output shaft 221. When the output shaft 221 rotates to the first position and the second position, the abutting portion will abut against the positioning convex block, so that the output shaft 221 cannot continue to rotate.

[0098] In one of the embodiments, as Figure 10 shown, the motor further includes a bearing 225 and an elastic sheet 226. The bearing 225 and the stator 223 are connected through the elastic sheet 226, and the output shaft 221 is rotationally fitted in the bearing 225.

[0099] With such a setting, by using the elasticity provided by the elastic sheet 226, the output shaft 221 can move in its own axial direction and be reset during the movement process.

[0100] Furthermore, the clearance size between the output shaft 221 and the hole wall of the shaft hole 102 is greater than or equal to 2 mm.

[0101] Due to the elasticity of the elastic sheet 226, the output shaft 221 may shake. When the clearance size 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.

[0102] 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 by the present application can easily think of changes or substitutions, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An oral cleaning appliance, characterized in that, Comprising: 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 driving assembly. The mounting bracket is located within the receiving cavity and fixed to the handle housing. 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; and A 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. The seal includes a sleeved portion, a linkage portion, and a clamping portion connected in sequence. The sleeved portion is sleeved on the output shaft. The clamping portion and the sleeved portion are arranged at intervals in the radial direction of the output shaft. The clamping portion is clamped between the mounting bracket and the handle housing. When the output shaft moves, at least a part of the linkage portion is kept in contact with the hole wall of the shaft hole by the fixing action of the clamping portion.

2. The oral cleaning appliance according to claim 1, wherein 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.

3. The oral cleaning appliance according to claim 2, 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, and the first deformation portion is connected to the second sleeve portion. The first fitting portion is in contact with the output shaft; A gap is left between the first deformation portion and the output shaft, or, the first deformation portion is formed with a plurality of wrinkles arranged along the axis direction of the output shaft, or, the thickness of the first deformation portion is less than the thickness of the first fitting portion.

4. The oral cleaning appliance according to claim 3, wherein, 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.

5. The oral cleaning implement according to claim 3, characterized in that, The surface of the first fitting portion close to the output shaft is provided with a protrusion portion, and the first fitting portion abuts against the output shaft through the protrusion portion, so that the first fitting portion is in close contact with the output shaft.

6. The oral cleaning appliance according to claim 2, wherein, One of the second sleeve portion and the output shaft is provided with a limiting protrusion, and the other is provided with a limiting groove cooperating with the limiting protrusion.

7. The oral cleaning appliance according to claim 1, characterized in that, The linkage portion includes a second deformation portion and a second fitting portion connected to each other. The second deformation portion is connected to the sleeved portion, and the second fitting portion is connected to the clamping portion. The second fitting portion abuts against the hole wall of the shaft hole.

8. The oral cleaning appliance according to claim 7, wherein, The depth of the shaft hole is greater than or equal to 3 mm and less than or equal to 10 mm.

9. The oral cleaning appliance according to claim 7, wherein, The oral cleaning appliance further includes a limiting plate connected to the mounting bracket. At least a part of the limiting plate extends into the shaft hole and is located between the second fitting portion and the sleeved portion.

10. The oral cleaning appliance according to claim 9, wherein, A gap is left between the end of the limiting plate away from the mounting bracket and the second deformation portion. The gap provides a moving space for the second deformation portion so that the second deformation portion can generate deformation.

11. The oral cleaning appliance according to claim 10, wherein, There is a gap between the limiting plate and the socket part, and the size of the gap between the limiting plate and the socket part 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 and the second fitting part, and the size of the gap between the limiting plate and the socket part is greater than or equal to 0.2 mm and less than or equal to 1 mm.

12. The oral cleaning appliance according to claim 10, characterized in that, There is a gap between the limiting plate and the socket part, 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.

13. The oral cleaning appliance according to claim 10, wherein, The length of the part of the limiting plate extending into the shaft hole is greater than half of the hole depth of the shaft hole.

14. The oral cleaning appliance according to claim 1, wherein, A spacing is formed between one side of the mounting bracket close to the shaft hole and the socket part, and the spacing is greater than the movement amplitude of the output shaft along its own axis direction.

15. The oral cleaning appliance according to claim 1, characterized in that, The mounting bracket is formed with a through hole, the output shaft passes through the through hole, and the aperture of the through hole is greater than the outer diameter of the socket part.

16. The oral cleaning appliance according to claim 1, wherein, The mounting bracket is formed with a through hole, the output shaft passes through the through hole, and the aperture 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 shell, the extension plate is arranged around the shaft hole, and the extension plate defines a groove communicated with the shaft hole; At least a part of the clamping part is clamped between the extension plate and the mounting bracket.

17. 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 rotating reciprocally between a first position and a second position around its own axis.

18. The oral cleaning appliance according to claim 17, characterized in that, 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°.

19. The oral cleaning appliance according to claim 17, characterized in that, The driving 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 shell, or the limiting structure is installed between the rotor and the mounting bracket.

20. The oral cleaning appliance according to claim 19, wherein The motor further includes a bearing and an elastic piece, the bearing and the stator are connected through the elastic piece, and the output shaft is rotationally matched with the bearing.

21. The oral cleaning implement according to claim 20, wherein, The size of the gap between the output shaft and the hole wall of the shaft hole is greater than or equal to 2 mm.

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