Oral care device

Abstract

The oral care equipment comprises a shell, a machine core and a first sealing piece, the shell comprises a main body part and a supporting part, a containing cavity is defined in the main body part, and a shaft hole communicated with the containing cavity is defined in the supporting part; the movement is arranged in the accommodating cavity and comprises an output shaft penetrating through the shaft hole; the output shaft is sleeved with the first sealing piece, the first sealing piece comprises a first base part and a deformation part which are connected, the first base part and the supporting part are relatively fixed, the deformation part abuts against the outer wall face of the output shaft in a sealed mode, and the wall thickness of the first base part is larger than that of the deformation part, so that the deformation capacity of the deformation part is larger than that of the first base part when the first sealing piece is stressed; the deformation amount of the first base part can be reduced in the process that the deformation part deforms along with the movement of the output shaft, so that the possibility that the first sealing piece is twisted or pulled to be damaged is reduced, the first base part can apply abutting action force to the deformation part, and the sealing stability between the output shaft and the shell is improved.

Description

Technical Field

[0001] This application relates to the technical field of electric toothbrush sealing components, and particularly to an oral care device. Background Art

[0002] With the development of technology and the improvement of living standards, people pay more and more attention to oral hygiene. More and more people use electric toothbrushes to brush their teeth. The electric toothbrush makes the brush head generate high-frequency vibrations through the rapid rotation or vibration of the motor shaft, instantly decomposes the toothpaste into fine foam, and thus deeply cleans the tooth gaps.

[0003] In related technologies, there are components such as a motor assembly inside the electric toothbrush. During use, in order to prevent water from flowing into the electric toothbrush along the mating part between the motor shaft and the handle housing, a sealing sleeve is usually provided in the gap. The sealing sleeve needs to seal the mating part between the output shaft and the handle housing. However, as the movement modes of the electric toothbrush motor shaft become more and more diversified, for example, there are motor shafts that can rotate 360° or motor shafts that can swing back and forth. In this movement mode, the sealing sleeve fixed on the motor shaft is prone to damage, thus having an adverse effect on the sealing of the mating part between the output shaft and the handle housing. Summary of the Utility Model

[0004] The embodiments of this application provide an oral care device that can improve the sealing stability between the output shaft and the housing of the oral care device.

[0005] The embodiments of this application provide an oral care device, including:

[0006] A housing, including a main body part and a support part. An accommodation cavity is defined inside the main body part, and a shaft hole communicating with the accommodation cavity is defined by the support part;

[0007] A movement mechanism, disposed in the accommodation cavity. The movement mechanism includes an output shaft that passes through the shaft hole; and,

[0008] A first seal, sleeved on the outer peripheral side of the output shaft. The first seal includes a connected first base part and a deformation part. The first base part is relatively fixed to the support part, and the deformation part is sealingly abutted against the outer wall surface of the output shaft. Among them, the wall thickness of the first base part is greater than the wall thickness of the deformation part, and the deformation part can follow the output shaft to move axially or circumferentially.

[0009] In some embodiments of this application, the deformation part is located on the side of the first base part facing the accommodation cavity. The deformation part includes a first branch and a second branch connected to the first base part. The first branch and the second branch are arranged at an angle. The first branch is sealingly abutted against the support part, and the second branch is sealingly abutted against the outer wall surface of the output shaft, thereby enabling the deformation part to better seal the support part and the output shaft.

[0010] In some embodiments of the present application, a part of the supporting portion protrudes from the inner wall surface of the main body portion and extends towards the inside of the accommodating cavity; wherein, the dimension of the shaft hole along the axial direction of the output shaft is greater than the wall thickness dimension of the housing, thereby increasing the contact area between the first base portion and the supporting portion.

[0011] In some embodiments of the present application, the movement mechanism further includes a mounting bracket, and the output shaft is connected to the mounting bracket; the first seal further includes a second base portion, and the deformation portion, the first base portion, and the second base portion are connected in sequence. The second base portion is clamped between the end of the supporting portion facing the mounting bracket and the mounting bracket, and the first base portion extends into the shaft hole.

[0012] In some embodiments of the present application, a first convex ring extending along the circumferential direction of the second base portion is provided on the outer wall of the second base portion, and the first convex ring abuts against the end of the supporting portion to improve the sealing performance between the second base portion and the supporting portion.

[0013] In some embodiments of the present application, the wall thickness of the first base portion and the wall thickness of the second base portion are both greater than the wall thickness of the deformation portion, and the wall thickness of the first base portion and the wall thickness of the second base portion are both greater than 1.5 mm. The deformation ability of the deformation portion is greater than the deformation ability of the first base portion and the second base portion, which can reduce the possibility of the first seal being twisted or pulled damaged during the movement of the output shaft.

[0014] In some embodiments of the present application, in the natural state, the length of the deformation portion along the radial direction of the output shaft is L1; the first base portion is in contact with the supporting portion, and the first base portion is spaced apart from the output shaft, and the spacing distance between the first base portion and the output shaft is L2, wherein, 1 / 2*L1 ≤ L2 ≤ 4 / 5*L1.

[0015] In some embodiments of the present application, the deformation portion is arranged in an inclined wall structure. The end of the deformation portion connected to the first base portion to the end in sealing contact with the output shaft extends in the direction away from the mounting bracket or in the direction close to the mounting bracket; alternatively, the deformation portion includes a third branch and a fourth branch connected to the first base portion, the third branch and the fourth branch are arranged at an angle, and both the third branch and the fourth branch are in sealing contact with the outer wall surface of the output shaft, thereby improving the sealing performance of the deformation portion.

[0016] In some embodiments of the present application, the first seal includes a plurality of deformation portions, and the plurality of deformation portions are all connected to the first base portion and are arranged along the axial direction of the output shaft to further improve the sealing performance of the first seal.

[0017] In some embodiments of the present application, the movement mechanism further includes a mounting bracket, and the output shaft is connected to the mounting bracket; the oral care device further includes a second seal, the second seal is sleeved on the outer peripheral side of the output shaft, and the second seal is clamped between the output shaft and the mounting bracket. The first seal and the second seal can form two independent sealing effects, and their combined action makes the sealing effect of the oral care device better.

[0018] In some embodiments of the present application, the mounting bracket includes a bracket body and a clamping portion. The output shaft passes through the bracket body and the clamping portion. The bracket body, the clamping portion and the output shaft jointly enclose an installation space, and the second seal is located in the installation space.

[0019] In some embodiments of the present application, the second seal includes a connected first end portion and a bifurcated portion; the first end portion and the bifurcated portion are arranged along the axial direction of the output shaft, the bifurcated portion is located on the side of the first end portion facing the shaft hole, and the bifurcated portion is in sealing contact with both the output shaft and the mounting bracket. Or, the first end portion and the bifurcated portion are arranged along the radial direction of the output shaft, the bifurcated portion is located on the side of the first end portion facing the output shaft, and the bifurcated portion is in sealing contact with the output shaft, and the first end portion is in sealing contact with the mounting bracket.

[0020] In some embodiments of the present application, the first seal further includes a sleeved portion, the sleeved portion and the first base portion are connected to opposite ends of the deformation portion, the sleeved portion is located on the side of the deformation portion facing the output shaft, and the sleeved portion is in sealing contact with the output shaft.

[0021] In some embodiments of the present application, the sleeved portion includes a first sleeve portion and a second sleeve portion arranged along the axial direction of the output shaft. The first sleeve portion is connected between the deformation portion and the second sleeve portion. The output shaft is in sealing contact with the first sleeve portion and the second sleeve portion; the first sleeve portion has a first sleeve hole, the second sleeve portion has a second sleeve hole, the output shaft passes through the first sleeve hole and the second sleeve hole, the aperture of the first sleeve hole is larger than the aperture of the second sleeve hole, and the binding force formed between the second sleeve portion and the output shaft is greater than the binding force formed between the first sleeve portion and the output shaft.

[0022] In some embodiments of the present application, the sleeved portion further includes a hollow portion, the hollow portion is connected between the first sleeve portion and the second sleeve portion, and the hollow portion is spaced from the output shaft to provide a deformation space for the deformation of the first sleeve portion and the second sleeve portion.

[0023] In some embodiments of the present application, the oral care device further includes a constraint member, the constraint member is arranged on the side of the second sleeve portion facing the output shaft, and the constraint member is in sealing contact with the output shaft; and / or, a second convex ring extending along the inner circumferential direction is arranged on the inner wall of the first sleeve portion, and the second convex ring is in sealing contact with the output shaft to improve the sealing performance between the first sleeve portion and the output shaft, and between the second sleeve portion and the output shaft.

[0024] In some embodiments of the present application, the movement mechanism further includes a mounting bracket and a limiting plate. The output shaft is connected to the mounting bracket. The first end of the limiting plate is connected to the mounting bracket. The limiting plate is located between the sleeved portion and the first base portion, and the second end of the limiting plate is spaced from the deformable portion, providing a deformation space for the deformable portion.

[0025] In some embodiments of the present application, the limiting plate is spaced from both the sleeved portion and the first base portion. The spacing distance between the limiting plate and the sleeved portion is between 0.2 mm and 1 mm; and / or, the spacing distance between the limiting plate and the first base portion is between 0.2 mm and 1 mm, thereby providing sufficient deformation space for the sleeved portion.

[0026] In some embodiments of the present application, the limiting plate is spaced from the sleeved portion and is in contact with the first base portion. At least a part of the first base portion is located between the limiting plate and the support portion, enabling the sleeved portion to have sufficient deformation space.

[0027] In some embodiments of the present application, the length of the overlapping portion of the limiting plate and the support portion along the axial direction of the output shaft is L3, and the length of the support portion along the axial direction of the output shaft is L4, where L3 > 2 / 1 * L4, so as to improve the sealing performance of the housing and the connection stability between the limiting plate and the support portion.

[0028] In some embodiments of the present application, a rib is provided on one of the sleeved portion and the output shaft, and a groove is provided on the other of the sleeved portion and the output shaft. The rib is used to cooperate with the groove to fix the sleeved portion and the output shaft, such that the sleeved portion will not undergo relative displacement when following the output shaft to reciprocate axially.

[0029] In some embodiments of the present application, the movement mechanism further includes a mounting bracket. The output shaft is connected to the mounting bracket. The mounting bracket has a first end face facing the first seal. The first end face is spaced from the first seal; and / or, a first through hole for the output shaft to pass through is provided on the mounting bracket, and the diameter of the first through hole is larger than the inner diameter of the sleeved portion.

[0030] In some embodiments of the present application, the movement mechanism further includes a motor. The motor is in transmission connection with the output shaft. The motor is used to drive the output shaft to rotate circumferentially around it, and the motor is also used to drive the output shaft to move axially along it; the spacing distance between the first end face and the first seal is greater than the axial movement distance of the output shaft.

[0031] In some embodiments of the present application, the movement mechanism further includes a mounting bracket. A first through hole for the output shaft to pass through is provided on the mounting bracket, and the diameter of the first through hole is smaller than the outer diameter of the deformable portion.

[0032] In some embodiments of the present application, the oral care device further includes a brush head. A part of the output shaft extends outside the shaft hole and is connected to the brush head.

[0033] In some embodiments of the present application, the movement mechanism further includes a mounting bracket, a stator, and a rotor. The stator is connected to the mounting bracket, and the output shaft is connected to the rotor. The rotor is capable of rotating relative to the stator to drive the output shaft to rotate along its axial direction.

[0034] In some embodiments of the present application, the movement mechanism further includes a bearing and an elastic member. The bearing is connected to the stator through the elastic member, and the output shaft passes through the bearing.

[0035] In some embodiments of the present application, the oral care device further includes a first limiting member and a second limiting member. The first limiting member cooperates with the second limiting member to limit the rotation angle of the output shaft. Among them, the first limiting member is disposed on one of the rotor and the stator, and the second limiting member is disposed on the other of the rotor and the stator; alternatively, the first limiting member is disposed on one of the rotor and the mounting bracket, and the second limiting member is disposed on the other of the rotor and the mounting bracket; alternatively, the first limiting member is disposed on one of the rotor and the main body portion, and the second limiting member is disposed on the other of the rotor and the main body portion.

[0036] Based on the oral care device in the embodiments of the present application, in this embodiment, the wall thickness of the first base is greater than that of the deformation portion, and the wall thickness of the deformation portion is the smallest. Therefore, the deformation portion is more likely to deform under force, that is, the deformation ability of the deformation portion is greater than that of the first base. Thus, the deformation portion can follow the output shaft to move axially or circumferentially, and at the same time, when the deformation portion follows the output shaft to deform, the deformation amount of the first base can be reduced, thereby reducing the influence of the movement of the output shaft on the first seal. That is to say, the possibility of the output shaft twisting or pulling the first seal during movement can be reduced, and when the deformation portion deforms, the first base can also exert an abutting force on the deformation portion, and the deformation portion is always in sealing abutment with the outer wall surface of the output shaft, thereby improving the sealing stability between the output shaft and the housing of the oral care device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 It is a schematic structural diagram of an oral care device in an embodiment of the present application;

[0039] Figure 2 It is a schematic structural diagram of a housing in an embodiment of the present application;

[0040] Figure 3Schematic cross-sectional structure diagram of part of an oral care device in an embodiment of the present application;

[0041] Figure 4 Schematic cross-sectional structure diagram of part of an oral care device in another embodiment of the present application;

[0042] Figure 5 is Figure 4 magnified structure diagram of part A in

[0043] Figure 6 Schematic cross-sectional structure diagram of part of an oral care device in yet another embodiment of the present application;

[0044] Figure 7 Schematic cross-sectional structure diagram of part of an oral care device in yet another embodiment of the present application;

[0045] Figure 8 Schematic cross-sectional structure diagram of part of an oral care device in yet another embodiment of the present application;

[0046] Figure 9 is Figure 8 magnified structure diagram of part B in

[0047] Figure 10 Schematic structure diagram of the first seal in an embodiment of the present application.

[0048] Reference numerals:

[0049] 1. Oral care device; 10. Housing; 11. Main body; 111. Accommodation cavity; 12. Support part; 121. Axial hole; 122. First step structure; 20. Movement; 21. Output shaft; 22. Mounting bracket; 221. First end face; 222. First through hole; 223. Bracket main body; 224. Clamping part; 23. Limiting plate; 30. First seal; 31. First base; 32. Deformation part; 321. First branch; 322. Second branch; 323. Third branch; 324. Fourth branch; 33. Second base; 331. First convex ring; 332. Second step structure; 34. Socket part; 341. First socket part; 3411. First socket hole; 342. Second socket part; 3421. Second socket hole; 343. Hollow part; 40. Second seal; 41. First end; 42. Forked part; 50. Brush head. Detailed implementation manners

[0050] To more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0051] As the movement mode of the motor shaft of the electric toothbrush becomes more and more diversified, for example, there appears a motor shaft that can rotate 360° or a motor shaft that can swing back and forth. In this kind of movement mode, the sealing sleeve fixed on the motor shaft will be twisted or pulled, seriously affecting the waterproof performance of the electric toothbrush.

[0052] For the above situation, please refer to Figures 1-3 , the present application proposes an oral care device 1, including a housing 10, a movement 20 and a first seal 30. Among them, the oral care device 1 can be an electric toothbrush or a dental cleaner.

[0053] The housing 10 includes a main body portion 11 and a support portion 12. An accommodation cavity 111 is defined inside the main body portion 11. The movement 20 is arranged in the accommodation cavity 111. The housing 10 provides an installation space and a setting basis for the movement 20. The support portion 11 defines a shaft hole 121 communicating with the accommodation cavity 111. The movement 20 includes an output shaft 21. The output shaft 21 passes through the shaft hole 121 to facilitate the connection of the output shaft 21 with external components. Among them, the main body portion 11 and the support portion 12 can be an integral structure, that is, the main body portion 11 and the support portion 12 are integrally formed. Or, the main body portion 11 and the support portion 12 can also be a split structure, and the support portion 11 is connected to one end of the main body portion 12. The output shaft 21 can move along the axial direction of the output shaft 21 or rotate around the circumferential direction of the output shaft 21, and the output shaft 21 can pass through the shaft hole 121 to penetrate out of the accommodation cavity 111. Or, the output shaft 21 may not completely penetrate out of the shaft hole 121.

[0054] As Figures 4-5 shown, the first seal 30 is sleeved on the outer peripheral side of the output shaft 21. The first seal 30 includes a connected first base portion 31 and a deformation portion 32. Therefore, both the first base portion 31 and the deformation portion 32 can be annular and sleeved on the outer peripheral side of the output shaft 21. The first base portion 31 and the support portion 12 can be relatively fixed by means of clamping, bonding or integral molding, etc. The deformation portion 32 is hermetically abutted against the outer wall surface of the output shaft 21, that is, there is a force between the deformation portion 32 and the outer wall surface of the output shaft 21. The deformation portion 32 is squeezed and deformed so that the output shaft 21 and the support portion 12 are sealed. Specifically, the first seal 30 can be a flexible seal, such as a rubber seal or a polyvinyl chloride seal, etc.

[0055] Among them, since the wall thickness of the first base portion 31 is greater than that of the deformation portion 32, and the wall thickness of the deformation portion 32 is the smallest, the deformation portion 32 is more likely to deform under force, that is, the deformation ability of the deformation portion 32 is greater than that of the first base portion 31. As a result, the deformation portion 32 can deform following the axial or circumferential movement of the output shaft 21. At the same time, when the deformation portion 32 deforms following the movement of the output shaft 21, the deformation amount of the first base portion 31 can be reduced, thereby reducing the influence of the movement of the output shaft 21 on the first seal 30. That is to say, the possibility of the output shaft 21 damaging the first seal 30 by twisting or pulling during movement can be reduced. Moreover, when the deformation portion 32 deforms, the first base portion 31 can exert an abutting force on the deformation portion 32, so that the deformation portion 32 is always in sealing abutment with the outer wall surface of the output shaft 21, thereby improving the sealing stability between the output shaft 21 and the support portion 12.

[0056] Please refer to Figure 2 , in some embodiments of the present application, a part of the support portion 12 protrudes from the inner wall surface of the housing 10 and extends towards the inside of the accommodation cavity 111. The support portion 12 is located inside the accommodation cavity 111, so that the shaft hole 121 formed by surrounding the support portion 12 is also located in the accommodation cavity 111. The accommodation cavity 111 provides an accommodation space for the arrangement of the support portion 12. The dimension of the shaft hole 121 along the axial direction of the output shaft 21 is greater than the wall thickness dimension of the housing 10, that is, the length of the support portion 12 along the axial direction of the output shaft 21 is greater than the wall thickness of the housing 10. A part of the support portion 12 protrudes relative to the housing 10. When the first base portion 31 is relatively fixed to the support portion 12, the contact area between the first base portion 31 and the support portion 12 increases. Thus, when the output shaft 21 and the support portion 12 squeeze the first seal 30, the sealing performance of the housing 10 can be improved.

[0057] In some embodiments of the present application, the movement mechanism 20 further includes a motor (not shown in the figure). The motor is in transmission connection with the output shaft 21 and is used to drive the output shaft 21 to rotate circumferentially around it and also to drive the output shaft 21 to move axially along it. Among them, the oral care device 1 may include an operating member arranged outside the accommodation cavity 111. The output shaft 21 may be connected to an external operating member to drive the operating member to perform oral care.

[0058] Exemplarily, as Figure 3 shown, the operating member may be a brush head 50. At this time, a part of the output shaft 21 extends out of the shaft hole 121 and is connected to the brush head 50, so that the motor can drive the output shaft 21 and the brush head 50 to move axially along the output shaft 21 or rotate circumferentially around the output shaft 21 to complete the tooth cleaning work.

[0059] Please refer to Figure 5, in some embodiments of the present application, the deformation part 32 is located on the side of the first base part 31 facing the accommodation cavity 111. That is to say, the first base part 31 is located on the side of the support part 12 closer to the outside of the accommodation cavity 111. One side of the first base part 31 is fixedly connected to the support part 12, and the other side of the first base part 31 abuts against the output shaft 21.

[0060] The deformation part 32 includes a first branch 321 and a second branch 322 connected to the first base part 31. The first branch 321 and the second branch 322 are arranged at an angle. That is, the whole deformation part 32 is in the shape of the upper half of a "Y". The first branch 321 is in sealed abutment with the support part 12, and the second branch 322 is in sealed abutment with the outer wall surface of the output shaft 21. Thus, the deformation part 32 can better seal the support part 12 and the output shaft 21.

[0061] In some embodiments of the present application, the movement mechanism 20 further includes a mounting bracket 22 (as Figure 3 shown), a stator (not shown in the figure) and a rotor (not shown in the figure). The output shaft 21 is connected to the mounting bracket 22, the stator is connected to the mounting bracket 22, the output shaft 21 is connected to the rotor, and the rotor can rotate relative to the stator to drive the output shaft 21 to rotate along its axial direction.

[0062] In some embodiments, the movement mechanism 20 further includes a bearing and an elastic member (not shown in the figure). The bearing is connected to the stator through the elastic member, and the output shaft 21 passes through the bearing. The rotor drives the bearing and the output shaft 21 to rotate circumferentially. Since the elastic member has elasticity, the elastic member can drive the bearing to reset, thereby driving the output shaft 21 to reset.

[0063] In some embodiments of the present application, the oral care device 1 further includes a first limiting member and a second limiting member (not shown in the figure). The first limiting member and the second limiting member cooperate to limit the rotation angle of the output shaft 21. Among them, the first limiting member is arranged on one of the rotor and the stator, and the second limiting member is arranged on the other of the rotor and the stator; or, the first limiting member is arranged on one of the rotor and the mounting bracket 22, and the second limiting member is arranged on the other of the rotor and the mounting bracket 22; or, the first limiting member is arranged on one of the rotor and the housing 10, and the second limiting member is arranged on the other of the rotor and the housing 10.

[0064] Among them, the movement mechanism 20 further includes a motor. Both the output shaft 21 and the motor are connected to the mounting bracket 22, and the mounting bracket 22 provides a setting basis for the output shaft 21 and the motor.

[0065] Please refer to Figure 6, in some embodiments of the present application, the mounting bracket 22 has a first end face 221 facing the first seal 30. The first end face 221 is spaced apart from the first seal 30, and the spacing between the first end face 221 and the first seal 30 is greater than the axial movement distance of the output shaft 21, thereby preventing interference between the mounting bracket 22 and the first seal 30 when the output shaft 21 moves axially.

[0066] Wherein, as Figures 8-9 shown, a first through hole 222 for the output shaft 21 to pass through is formed in the mounting bracket 22. The output shaft 21 passes through the first through hole 222, so the aperture of the first through hole 222 is larger than the diameter of the output shaft 21. At the same time, the output shaft 21 is disposed in the shaft hole 121, the first seal 30 is located in the shaft hole 121, and is sleeved on the outer peripheral side of the output shaft 21. The deformation part 32 is in sealing contact with the outer wall surface of the output shaft 21, so the outer diameter of the deformation part 32 is larger than the diameter of the output shaft 21. In some embodiments, the aperture of the first through hole 222 is smaller than the outer diameter of the deformation part 32, that is to say, the first through hole 222 is surrounded by the inner side of the deformation part 32. The closer the first through hole 222 is to the output shaft 21, the better the sealing effect.

[0067] Please refer to Figure 6 , in some embodiments of the present application, the first seal 30 further includes a second base 33. The deformation part 32, the first base 31 and the second base 33 are connected in sequence. The deformation part 32 is in sealing contact with the outer wall surface of the output shaft 21. The first base 31 extends into the shaft hole 121. The second base 33 is clamped between the end of the support part 12 facing the mounting bracket 22 and the mounting bracket 22. When the output shaft 21 moves circumferentially or rotates circumferentially, the output shaft 21 drives the deformation part 32 to deform. The deformation part 32 applies a force to the first base 31, and the second base 33 is clamped by the end of the support part 12 and the mounting bracket 22, so the second base 33 will also apply a force to the first base 31, thereby reducing the possibility of displacement of the first base 31.

[0068] Please continue to refer to Figure 6, in some embodiments of the present application, the wall thickness of the first base 31 and the wall thickness of the second base 33 are both greater than the wall thickness of the deformation part 32. It can be understood that the wall thickness of the deformation part 32 is the smallest. Therefore, compared with the first base 31 and the second base 33, the deformation ability of the deformation part 32 is greater than that of the first base 31 and the second base 33. As a result, the deformation part 32 can move axially or circumferentially along with the output shaft 21. At the same time, when the deformation part 32 deforms following the output shaft 21, the deformation amounts of the first base 31 and the second base 33 can be reduced, thereby reducing the influence of the movement of the output shaft 21 on the first seal 30. That is to say, the possibility that the first seal 30 is twisted or pulled damaged during the movement of the output shaft 21 can be reduced. And when the deformation part 32 deforms, the second base 33 can also apply a force to the first base 31 and the deformation part 32, reducing the situation where the first base 31 and the deformation part 32 are displaced, thereby ensuring the sealing performance between the output shaft 21 and the support part 12. Among them, the wall thickness of the first base 31 and the wall thickness of the second base 33 are both greater than 1.5 mm.

[0069] Please continue to refer to Figure 6 , in some embodiments of the present application, in the natural state, the length of the deformation part 32 along the radial direction of the output shaft 21 is L1. The natural state of the first seal 30 refers to the state when the first seal 30 is not subjected to any external force. At this time, the length of the deformation part 32 along the radial direction of the output shaft 21 is L1, and L1 is greater than the aperture of the shaft hole 121. As a result, when the first seal 30 seals the support part 12 and the output shaft 21, the output shaft 21 will exert extrusion on the deformation part 32, that is, a frictional force is generated between the output shaft 21 and the deformation part 32.

[0070] The first base 31 is in contact with the support part 12, and the first base 31 is spaced from the output shaft 21. As a result, the space between the first base 31 and the output shaft 21 can provide a space for the deformation part 32 to deform. In the natural state, the distance between the first base 31 and the output shaft 21 is L2. Among them, 1 / 2*L1 ≤ L2 ≤ 4 / 5*L1. If the length of L2 is less than 1 / 2*L1, the strength of the first base 31 is small, and the sealing effect between the support part 12 and the output shaft 21 is poor; if the length of L2 exceeds 4 / 5*L1, the deformable degree of the deformation part 32 is too small, and the space for the deformation part 32 to deform is too small.

[0071] Please refer to Figure 7, in some embodiments of the present application, the deformation part 32 is arranged in an inclined wall structure. Among them, from the end of the deformation part 32 connected to the first base 31 to the end in sealing contact with the output shaft 21, it extends in a direction away from the mounting bracket 22 or in a direction close to the mounting bracket 22. The structure of the deformation part 32 being an inclined wall is beneficial for the deformation part 32 to deform following the movement of the output shaft 21, so that the deformation part 32 can also be in contact with the output shaft 21 throughout the process when the output shaft 21 moves, thereby improving the sealing performance of the deformation part 32.

[0072] Or, please continue to refer to Figure 7 , in some embodiments, the deformation part 32 includes a third branch 323 and a fourth branch 324 connected to the first base 31. The third branch 323 and the fourth branch 324 are arranged at an angle, that is, the whole deformation part 32 is in the upper half of a "Y" shape, and both the third branch 323 and the fourth branch 324 are in sealing contact with the outer wall surface of the output shaft 21, thereby enabling the deformation part 32 to better seal the support part 12 and the output shaft 21.

[0073] Among them, the first seal 30 includes a plurality of deformation parts 32 connected to the first base 31. The plurality of deformation parts 32 are arranged along the axial direction of the output shaft 21, thereby further improving the sealing performance of the first seal 30.

[0074] Furthermore, please refer to Figures 8-10 , in some embodiments of the present application, a first convex ring 331 extending along its circumferential direction is provided on the outer wall of the second base 33. The first convex ring 331 abuts against the end of the support part 12. There is a force between the first convex ring 331 and the support part 12, and the first convex ring 331 is extruded to improve the sealing performance between the second base 33 and the support part 12. Among them, a plurality of first convex rings 331 can be provided, and the plurality of first convex rings 331 are spaced on the second base 33 to further improve the sealing performance between the second base 33 and the support part 12. The first convex ring 331 can be a silica gel seal ring or a rubber seal ring.

[0075] In some embodiments, as Figure 10 shown, a first step structure 122 can be provided at the end of the support part 12 (as Figure 2 shown), and a second step structure 332 can be provided on the second base 33. The two step surfaces on the first step structure 122 are correspondingly mated and abutted with the two step surfaces on the second step structure 332, thereby further improving the sealing performance between the second base 33 and the support part 12.

[0076] Please refer to Figures 9-10, in some embodiments of the present application, the first seal 30 further includes a socket portion 34. The socket portion 34 and the first base portion 31 are connected to opposite ends of the deformation portion 32. The socket portion 34 is located on the side of the deformation portion 32 facing the output shaft 21, and the socket portion 34 is in sealing contact with the output shaft 21. That is to say, when the first seal 30 is sleeved on the outer peripheral side of the output shaft 21, the socket portion 34 is in sealing contact with the outer peripheral side of the output shaft 21, thereby making the connection between the first seal 30 and the output shaft 21 tighter.

[0077] In some embodiments of the present application, a rib (not shown in the figure) is provided on one of the socket portion 34 and the output shaft 21, and a groove (not shown in the figure) is provided on the other of the socket portion 34 and the output shaft 21. The rib is used to cooperate with the groove to fix the socket portion 34 and the output shaft 21, so that the socket portion 34 and the output shaft 21 are tightly fitted, so that the socket portion 34 can reciprocate axially along with the output shaft 21, and the socket portion 34 will not shift relative to the output shaft 21 when reciprocating axially along with the output shaft 21.

[0078] In some embodiments, as Figures 9-10 shown, a first through hole 222 for the output shaft 21 to pass through is provided on the mounting bracket 22. The output shaft 21 passes through the first through hole 222. Therefore, the aperture of the first through hole 222 is larger than the diameter of the output shaft 21. Since the socket portion 34 is in contact with the output shaft 21, the aperture of the first through hole 222 is larger than the inner diameter of the socket portion 34, which facilitates the output shaft 21 to pass through the first through hole 222.

[0079] Furthermore, please refer to Figures 9-10 , in some embodiments of the present application, the socket portion 34 includes a first socket portion 341 and a second socket portion 342 arranged axially along the output shaft 21. The first socket portion 341 is connected between the deformation portion 32 and the second socket portion 342. The output shaft 21 is in sealing contact with the first socket portion 341 and the second socket portion 342; the first socket portion 341 has a first socket hole 3411, and the second socket portion 342 has a second socket hole 3421. The output shaft 21 passes through the first socket hole 3411 and the second socket hole 3421.

[0080] Among them, a double seal is formed between the first socket portion 341 and the second socket portion 342 and the output shaft 21 to improve the sealing effect of the first seal 30. The aperture of the first socket hole 3411 is larger than the aperture of the second socket hole 3421. Also, since the output shaft 21 is in sealing contact with both the first socket portion 341 and the second socket portion 342, the binding force formed between the second socket portion 342 and the output shaft 21 is greater than the binding force formed between the first socket portion 341 and the output shaft 21. When the output shaft 21 moves, the first socket portion 341 deforms to reduce the influence of the fit between the second socket portion 342 and the output shaft 21.

[0081] Further, please continue to refer to Figures 9-10 In some embodiments of the present application, the socket portion 34 further includes a hollow portion 343. The hollow portion 343 is connected between the first socket portion 341 and the second socket portion 342. The hollow portion 343 is disposed at an interval from the output shaft 21. The setting of the hollow portion 343 can provide a deformation space for the deformation of the first socket portion 341 and the second socket portion 342, and reduce the interference between the first socket portion 341 and the second socket portion 342.

[0082] Please refer to Figures 9-10 In some embodiments of the present application, the oral care device 1 further includes a restraint member (not shown in the figure). The restraint member is disposed on a side of the second socket portion 342 facing the output shaft 21, and the restraint member is in sealing abutment with the output shaft 21. There is a force between the restraint member and the output shaft 21, and the restraint member is squeezed to improve the sealing performance between the second socket portion 342 and the output shaft 21.

[0083] Alternatively, in some embodiments, a second convex ring (not shown in the figure) extending along the inner circumferential direction is provided on the inner wall of the first socket portion 341. The second convex ring is in sealing abutment with the output shaft 21. There is a force between the second convex ring and the output shaft 21, and the second convex ring is squeezed to improve the sealing performance between the first socket portion 341 and the output shaft 21.

[0084] Alternatively, in some embodiments, a second convex ring is provided on the inner wall of the first socket portion 341, and a restraint member is provided on the second socket portion 342, thereby not only improving the sealing performance between the first socket portion 341 and the output shaft 21, but also improving the sealing performance between the second socket portion 342 and the output shaft 21. Among them, the restraint member and the second convex ring can be a silicone sealing ring or a rubber sealing ring.

[0085] Please refer to Figure 9 In some embodiments of the present application, the movement mechanism 20 further includes a limiting plate 23. The first end of the limiting plate 23 is connected to the mounting bracket 22. The limiting plate 23 is located between the socket portion 34 and the first base portion 31, and the second end of the limiting plate 23 is disposed at an interval from the deformation portion 32. It can be understood that when the output shaft 21 moves axially, there can always be a gap between the deformation portion 32 and the second end of the limiting plate 23, and the gap between the limiting plate 23 and the deformation portion 32 can provide a deformation space for the deformation portion 32. In addition, the limiting plate 23 can also prevent the deformation portion 32 from denting into the accommodating cavity 111.

[0086] Further, please continue to refer to Figure 9 In some embodiments of the present application, the limiting plate 23 is disposed at an interval from both the socket portion 34 and the first base portion 31, thereby providing sufficient deformation space for the socket portion 34.

[0087] Wherein, the spacing distance between the limiting plate 23 and the socket part 34 is between 0.2 mm and 1 mm, and / or the spacing distance between the limiting plate 23 and the first base part 31 is between 0.2 mm and 1 mm. It can be understood that if the spacing between the limiting plate 23 and the socket part 34 is less than 0.2 mm, friction is likely to occur. If the spacing between the limiting plate 23 and the socket part 34 is greater than 1 mm, the liquid sealing effect is poor and water ingress may occur. Similarly, if the spacing between the limiting plate 23 and the first base part 31 is less than 0.2 mm, friction is likely to occur. If the spacing between the limiting plate 23 and the first base part 31 is greater than 1 mm, the liquid sealing effect is poor and water ingress may occur.

[0088] Alternatively, in some embodiments, the limiting plate 23 and the socket part 34 are spaced apart to enable the socket part 34 to have sufficient deformation space, and the limiting plate 23 is in contact with the first base part 31. At least a part of the first base part 31 is located between the limiting plate 23 and the support part 12, which is beneficial to ensuring the sealing performance of the fitting part between the first base part 31 and the limiting plate 23.

[0089] Please refer to Figure 9 , in some embodiments of the present application, the overlapping length of the limiting plate 23 and the support part 12 along the axial direction of the output shaft 21 is L3, and the length of the support part 12 along the axial direction of the output shaft 21 is L4, L3 > 2 / 1 * L4. That is to say, the overlapping length of the limiting plate 23 and the support part 12 along the axial direction of the output shaft 21 is greater than half of the length of the support part 12 along the axial direction of the output shaft 21, thereby improving the sealing performance of the housing 10 and the connection stability between the limiting plate 23 and the support part 12.

[0090] Please refer to Figures 8-9 , in some embodiments of the present application, the oral care device 1 further includes a second seal 40. The second seal 40 is sleeved on the outer peripheral side of the output shaft 21, and the second seal 40 is clamped between the output shaft 21 and the mounting bracket 22. The second seal 40 can be used to seal the gap between the output shaft 21 and the mounting bracket 22. Specifically, the first seal 30 is clamped between the output shaft 21 and the support part 12, and the second seal 40 is clamped between the output shaft 21 and the mounting bracket 22. Therefore, the first seal 30 and the second seal 40 can form two independent sealing effects, and the two act together to make the sealing effect of the oral care device 1 better.

[0091] Further, please refer to Figure 9, in some embodiments of the present application, the mounting bracket 22 includes a bracket main body 223 and a clamping portion 224. The output shaft 21 passes through the bracket main body 223 and the clamping portion 224. The bracket main body 223, the clamping portion 224 and the output shaft 21 jointly enclose an installation space, and the second seal 40 is located in the installation space, thereby providing an installation space and a setting basis for the second seal 40. In the axial direction of the output shaft 21, the bracket main body 223 and the clamping portion 224 clamp and limit the second seal 40; in the radial direction of the output shaft 21, the side wall of the installation space (the bracket main body 223 or the clamping portion 224) and the output shaft 21 limit the second seal 40, so that the second seal 40 is extruded both axially and radially of the output shaft 21, so that the position of the second seal 40 is fixed, preventing the second seal 40 from affecting its sealing performance due to following the movement of the output shaft 21.

[0092] In some embodiments, the clamping portion 224 and the socket portion 34 are spaced apart, and the spacing distance between the clamping portion 224 and the socket portion 34 is greater than the axial movement distance of the output shaft 21, preventing the socket portion 34 from moving axially and causing interference when contacting the clamping portion 224. Among them, the limiting plate 23 can be connected to the bracket main body 223 through the clamping portion 224, that is, the clamping portion 224 is located between the limiting plate 23 and the bracket main body 223.

[0093] Please continue to refer to Figure 9 , in some embodiments of the present application, the second seal 40 includes a connected first end portion 41 and a bifurcated portion 42, that is, the second seal 40 is integrally in a "Y" shape. The first end portion 41 is the lower half of the "Y" shape, and the bifurcated portion 42 is the upper half of the "Y" shape.

[0094] In some embodiments, the first end portion 41 and the bifurcated portion 42 are arranged axially along the output shaft 21. The bifurcated portion 42 is located on the side of the first end portion 41 facing the shaft hole 121, and the bifurcated portion 42 is in sealing contact with both the output shaft 21 and the mounting bracket 22. Since the bifurcated portion 42 is larger in size in the width direction than the first end portion 41, the contact compression amount between the bifurcated portion 42 and the output shaft 21 and the mounting bracket 22 is larger, that is, the sealing effect of the bifurcated portion 42 is better than that of the first end portion 41. Therefore, the bifurcated portion 42 is arranged on the side of the first end portion 41 facing the shaft hole 121 to improve the sealing effect of the second seal 40.

[0095] Alternatively, in some embodiments, the first end portion 41 and the bifurcated portion 42 are arranged radially along the output shaft 21. The bifurcated portion 42 is located on the side of the first end portion 41 facing the output shaft 21. The first end portion 41 is in sealing abutment with the mounting bracket 22, and the bifurcated portion 42 is in sealing abutment with the output shaft 21. Both ends of the bifurcated portion 42 are in abutment with the output shaft 21, so that the second seal 40 and the output shaft 21 have two sealing positions, thereby improving the sealing effect of the second seal 40.

[0096] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; 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 drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the components or elements 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 for illustrative purposes and should not be construed as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0097] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. An oral care device, characterized in that, Comprising: A housing including a main body portion and a support portion, an accommodation cavity being defined within the main body portion, and a shaft hole being defined in the support portion and communicating with the accommodation cavity; A movement disposed within the accommodation cavity, the movement including an output shaft that passes through the shaft hole; and, A first seal sleeved on the outer peripheral side of the output shaft, the first seal including a connected first base portion and a deformation portion, the first base portion being relatively fixed to the support portion, the deformation portion being sealingly abutted against the outer wall surface of the output shaft, wherein the wall thickness of the first base portion is greater than the wall thickness of the deformation portion, the deformation portion being capable of deforming following the axial or circumferential movement of the output shaft, and the deformation portion always being sealingly abutted against the outer wall surface of the output shaft.

2. The oral care device according to claim 1, wherein, The deformation portion is located on a side of the first base portion facing the accommodation cavity, the deformation portion including a first branch and a second branch connected to the first base portion, the first branch and the second branch being disposed at an angle, the first branch being sealingly abutted against the support portion, and the second branch being sealingly abutted against the outer wall surface of the output shaft.

3. The oral care device according to claim 1, characterized in that A part of the support portion protrudes from the inner wall surface of the main body portion and extends towards the interior of the accommodation cavity; Wherein, the dimension of the shaft hole along the axial direction of the output shaft is greater than the wall thickness dimension of the housing.

4. The oral care device according to claim 1, characterized in that, The movement further includes a mounting bracket, the output shaft being connected to the mounting bracket; The first seal further includes a second base portion, the deformation portion, the first base portion, and the second base portion being connected in sequence, the second base portion being clamped between an end of the support portion facing the mounting bracket and the mounting bracket, and the first base portion extending into the shaft hole.

5. The oral care device according to claim 4, characterized in that, A first convex ring extending along the circumferential direction of the second base portion is provided on the outer wall of the second base portion, and the first convex ring abuts against the end of the support portion.

6. The oral care device according to claim 4, wherein, The wall thickness of the first base portion and the wall thickness of the second base portion are both greater than the wall thickness of the deformation portion, and the wall thickness of the first base portion and the wall thickness of the second base portion are both greater than 1.5 mm.

7. The oral care device according to claim 4, characterized in that, In a natural state, the length of the deformation portion along the radial direction of the output shaft is L1; The first base portion is in contact with the support portion, and the first base portion is spaced apart from the output shaft, and the spacing distance between the first base portion and the output shaft is L2, wherein, 1 / 2*L1≤L2≤4 / 5*L1.

8. The oral care device according to claim 4, wherein The deformation portion is arranged in an inclined wall structure, and from the end of the deformation portion connected to the first base portion to the end sealingly abutted against the output shaft, it extends in a direction away from the mounting bracket or in a direction close to the mounting bracket; Or, The deformation portion includes a third branch and a fourth branch connected to the first base portion, the third branch and the fourth branch being disposed at an angle, and both the third branch and the fourth branch being sealingly abutted against the outer wall surface of the output shaft.

9. The oral care device according to claim 4, characterized in that, The first seal includes a plurality of the deformation portions, the plurality of the deformation portions being all connected to the first base portion, and the plurality of the deformation portions being arranged along the axial direction of the output shaft.

10. The oral care device according to claim 1, characterized in that, The movement further includes a mounting bracket, the output shaft being connected to the mounting bracket; The oral care device further includes: The second seal is sleeved on the outer peripheral side of the output shaft, and the second seal is clamped between the output shaft and the mounting bracket.

11. The oral care device according to claim 10, characterized in that, The mounting bracket includes a bracket body and a clamping portion. The output shaft passes through the bracket body and the clamping portion. The bracket body, the clamping portion and the output shaft jointly define an installation space, and the second seal is located in the installation space.

12. The oral care device according to claim 10, wherein, The second seal includes a connected first end portion and a bifurcated portion; The first end portion and the bifurcated portion are arranged along the axial direction of the output shaft. The bifurcated portion is located on the side of the first end portion facing the shaft hole, and the bifurcated portion is in sealing contact with both the output shaft and the mounting bracket. Alternatively, the first end portion and the bifurcated portion are arranged along the radial direction of the output shaft. The bifurcated portion is located on the side of the first end portion facing the output shaft, and the bifurcated portion is in sealing contact with the output shaft, and the first end portion is in sealing contact with the mounting bracket.

13. The oral care device according to claim 1, characterized in that The first seal further includes a sleeved portion. The sleeved portion and the first base are connected to opposite ends of the deformation portion. The sleeved portion is located on the side of the deformation portion facing the output shaft, and the sleeved portion is in sealing contact with the output shaft.

14. The oral care device according to claim 13, characterized in that, The sleeved portion includes a first sleeve portion and a second sleeve portion arranged along the axial direction of the output shaft. The first sleeve portion is connected between the deformation portion and the second sleeve portion. The output shaft is in sealing contact with the first sleeve portion and the second sleeve portion; The first sleeve portion has a first sleeve hole, and the second sleeve portion has a second sleeve hole. The output shaft passes through the first sleeve hole and the second sleeve hole. The aperture of the first sleeve hole is larger than the aperture of the second sleeve hole.

15. The oral care device according to claim 14, characterized in that, The sleeved portion further includes a hollow portion. The hollow portion is connected between the first sleeve portion and the second sleeve portion. The hollow portion is spaced from the output shaft.

16. The oral care device according to claim 14, wherein, The oral care device further includes a restraint member. The restraint member is disposed on the side of the second sleeve portion facing the output shaft, and the restraint member is in sealing contact with the output shaft; and / or A second convex ring extending along the inner circumferential direction is provided on the inner wall of the first sleeve portion, and the second convex ring is in sealing contact with the output shaft.

17. The oral care device according to claim 13, wherein, The movement further includes a mounting bracket and a limiting plate. The output shaft is connected to the mounting bracket. The first end of the limiting plate is connected to the mounting bracket. The limiting plate is located between the sleeved portion and the first base, and the second end of the limiting plate is spaced from the deformation portion.

18. The oral care device according to claim 17, wherein, The limiting plate is spaced from both the sleeved portion and the first base. The spacing distance between the limiting plate and the sleeved portion is between 0.2 mm and 1 mm; and / or the spacing distance between the limiting plate and the first base is between 0.2 mm and 1 mm.

19. The oral care device according to claim 17, wherein The limiting plate is spaced from the sleeved portion, and the limiting plate is in contact with the first base. At least a part of the first base is located between the limiting plate and the supporting portion.

20. The oral care device according to claim 17, characterized in that, The length of the overlapping portion of the limiting plate and the supporting portion along the axial direction of the output shaft is L3, and the length of the supporting portion along the axial direction of the output shaft is L4. L3 > 2 / 1 * L4.

21. The oral care device according to claim 13, wherein, One of the socket part and the output shaft is provided with a rib, and the other of the socket part and the output shaft is provided with a groove, and the rib is used for cooperating with the groove.

22. The oral care device according to claim 13, wherein, The movement further includes a mounting bracket, and the output shaft is connected to the mounting bracket; The mounting bracket has a first end face facing the first seal, and the first end face is spaced from the first seal; and / or, the mounting bracket is provided with a first through hole for the output shaft to pass through, and the inner diameter of the first through hole is larger than the inner diameter of the socket part.

23. The oral care device according to claim 22, wherein, The movement further includes a motor, the motor is in transmission connection with the output shaft, the motor is used for driving the output shaft to rotate circumferentially around it, and the motor is also used for driving the output shaft to move axially along it; The spacing distance between the first end face and the first seal is greater than the axial movement distance of the output shaft along it.

24. The oral care device according to claim 1, characterized in that, The movement further includes a mounting bracket, and the mounting bracket is provided with a first through hole for the output shaft to pass through, and the inner diameter of the first through hole is smaller than the outer diameter of the deformation part.

25. The oral care device according to claim 1, characterized in that, The oral care device further includes a brush head, and a part of the output shaft extends out of the shaft hole and is connected to the brush head.

26. The oral care device according to claim 1, wherein, The movement further includes a mounting bracket, a stator and a rotor, the stator is connected to the mounting bracket, the output shaft is connected to the rotor, and the rotor can rotate relative to the stator to drive the output shaft to rotate axially along it.

27. The oral care device according to claim 26, wherein, The movement further includes a bearing and an elastic member, the bearing is connected to the stator through the elastic member, and the output shaft passes through the bearing.

28. The oral care device according to claim 27, wherein, The oral care device further includes a first limiting member and a second limiting member, and the first limiting member cooperates with the second limiting member to limit the rotation angle of the output shaft; Wherein, the first limiting member is arranged on one of the rotor and the stator, and the second limiting member is arranged on the other of the rotor and the stator; or, the first limiting member is arranged on one of the rotor and the mounting bracket, and the second limiting member is arranged on the other of the rotor and the mounting bracket; or, the first limiting member is arranged on one of the rotor and the main body part, and the second limiting member is arranged on the other of the rotor and the main body part.

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