Water flosser

Abstract

This invention discloses a water flosser, comprising: a body defining a liquid storage chamber and a mounting chamber, the mounting chamber having a first chamber and a second chamber; a through hole and a drain outlet formed on the body; an inlet forming an injection port communicating with the liquid storage chamber; a drain channel defining a drain passage between the outer peripheral surface of the inlet and the inner wall of the through hole, the drain channel communicating with the drain outlet; a guide hole provided between the drain channel and the first chamber, the first chamber and the drain channel communicating through the guide hole; a locking assembly disposed in the first chamber; one end of a water spray pipe passing through the body and detachably connected to the locking assembly, and extending through the locking assembly into the second chamber and connected to the water pump portion of the core assembly; a button passing through the body and slidably connected to the locking assembly, the angle between the central axis of the button and the central axis of the water spray pipe being an acute angle. According to the water flosser of this invention, wastewater is less likely to contact the core assembly, and wastewater entering the first chamber can be discharged promptly, preventing bacterial growth.

Description

Technical Field

[0001] This invention relates to the field of oral care appliances, and in particular to a water flosser. Background Technology

[0002] A water flosser is an auxiliary tool for cleaning the oral cavity. It uses pulsating water jets to clean teeth and between teeth. The most common type of water flosser is the handheld one. Traditional water flossers usually have nozzles to spray water from the internal tank. However, during use, some water inevitably flows onto the surface of the water flosser and seeps into its interior. Furthermore, during nozzle insertion and removal, residual water at the bottom of the nozzle can also flow into the water flosser. This water can damage the mechanism, shortening the lifespan of the water flosser. Additionally, if the wastewater inside the water flosser is not drained promptly, it can easily breed bacteria.

[0003] In addition, most water flossers have a horizontal pressing locking mechanism, where the user applies horizontal force to the button to lock and unlock. However, this horizontal pressing method can affect the user's comfort and is prone to jamming. Alternatively, water flossers may have a vertical pressing locking mechanism, where the user applies vertical force to the button to lock and unlock. However, the vertical pressing locking mechanism is complex in structure and is prone to misalignment and failure after prolonged use. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a water flosser in which wastewater does not easily come into contact with the core components, and wastewater entering the first chamber of the water flosser can be discharged in a timely manner to prevent bacterial growth.

[0005] A water flosser according to an embodiment of the present invention includes: a body defining a liquid storage chamber and a mounting chamber, the mounting chamber having an independent first chamber and a second chamber, the second chamber housing a mechanism assembly; a through hole and a drain outlet formed on the body, the through hole being spaced apart from the first chamber along a first direction and communicating with the liquid storage chamber; an inlet member disposed at the through hole, the inlet member having an injection port formed on the inlet member communicating with the liquid storage chamber; a drain channel defining a drain surface between the outer peripheral surface of the inlet member and the inner wall of the through hole, the drain channel communicating with the drain outlet; a guide hole provided between the drain channel and the first chamber; and the first chamber and the mounting chamber... The sewage discharge channel is connected through the guide hole; a locking assembly is disposed in the first chamber, the base sidewall of the locking assembly is sealed to the inner wall of the first chamber, and the locking assembly can be switched between a locked position and an unlocked position; a water spray pipe, one end of which passes through the body and is detachably connected to the locking assembly, and extends through the locking assembly into the second chamber and is connected to the water pump part of the core assembly; a button, which passes through the body and is slidably connected to the locking assembly to control the locking assembly to switch between locking and unlocking the water spray pipe, and the angle between the central axis of the button and the central axis of the water spray pipe is an acute angle.

[0006] According to embodiments of the present invention, the water flosser, through the combined action of the guide hole and the drain channel, allows liquid flowing into the first chamber from the body to flow smoothly through the guide hole, the drain channel, and the drain outlet before exiting the body. This prevents liquid accumulation in the first chamber, reducing bacterial growth and improving the safety of the water flosser. Furthermore, when the spray nozzle is removed, the likelihood of liquid flowing back into the pump section from the first chamber is reduced, improving the cleanliness of the pump section and the reservoir, making it more hygienic and reassuring for the user, thus enhancing the user experience. Additionally, the sealed connection between the base and the inner wall of the body reduces the risk of liquid flowing into the second chamber and damaging other electrical components of the core assembly, thereby extending the lifespan of the core assembly and the water flosser itself. Moreover, compared to traditional water flossers, the spray nozzle can be easily installed and removed, improving user comfort during installation and removal. The locking component has a simple structure and, compared to a vertical pressing method, avoids misalignment and failure, further facilitating the use of the water flosser.

[0007] According to some embodiments of the present invention, the bottom wall of the drain channel extends obliquely from the guide hole toward the drain outlet and toward the adjacent liquid storage chamber, and the side wall of the drain channel is formed as a curved surface.

[0008] According to some embodiments of the present invention, the side surface of the base adjacent to the center of the first chamber is higher than the bottom wall of the guide hole, and extends obliquely from the first chamber toward the guide hole and from the side surface of the base toward the second chamber.

[0009] According to some embodiments of the present invention, the oral irrigator further includes: a cover body, the cover body being pivotally connected to the body, the cover body being operable at the injection port to open and close the injection port, and when the cover body closes the injection port, a gap is formed between the side of the cover body adjacent to the drain port and the drain port.

[0010] According to some embodiments of the present invention, the locking assembly includes: a fixing block connected to a side surface of the base adjacent to the center of the first chamber, the fixing block having a first through hole formed thereon; a mating block connected to a side surface of the base adjacent to the center of the first chamber, the mating block being located at one end of the fixing block adjacent to the button member, the button member being slidably connected to the mating block; and a pushing member slidably disposed on the fixing block, the pushing member having a second through hole formed thereon, the second through hole communicating with the first through hole, and one end of the water spray pipe extending into the second chamber through the second through hole and the first through hole.

[0011] According to some embodiments of the present invention, the oral irrigator further includes: a water tank, one end of which is open, and a body extending into the water tank from the one end of which the water tank is open. The water tank and the body together define an accommodating space. A plurality of mating grooves are formed on one of the water tank and the body, and a plurality of mating protrusions are provided on the other of the water tank and the body. The plurality of mating protrusions respectively engage with the plurality of mating grooves.

[0012] According to some embodiments of the present invention, the water tank includes: a first water tank, wherein a plurality of the mating protrusions are located on the inner wall of the first water tank, and a plurality of the mating grooves are formed on the outer peripheral surface of the body; a second water tank, wherein the second water tank is located on the side of the first water tank away from the body, at least a portion of the second water tank is located inside the first water tank, one end of the second water tank is slidably connected to the inner wall of the first water tank, and the second water tank switches between an open position and a closed position, wherein, during the process of switching from the closed position to the open position, the other end of the second water tank moves in a direction away from the first water tank, and during the process of switching from the open position to the closed position, the other end of the second water tank moves in a direction toward the adjacent first water tank.

[0013] According to some embodiments of the present invention, one of the first water tank and the second water tank has a plurality of grooves formed thereon, the plurality of grooves being arranged at intervals along the axial direction of the first water tank, and the other of the first water tank and the second water tank has a protrusion that engages with one of the plurality of grooves.

[0014] According to some embodiments of the present invention, the groove away from the body among the plurality of grooves is a first groove, and the remaining grooves are second grooves. In the axial direction of the first water tank, the sidewall of the first groove adjacent to the body extends obliquely toward the body; in the axial direction of the first water tank, the sidewall of the second groove away from the body extends obliquely away from the body.

[0015] According to some embodiments of the present invention, a clearance groove is provided between two adjacent grooves, the clearance groove extending along the axial direction of the first water tank, and the protrusion is adapted to move along the clearance groove between two adjacent grooves to switch the second water tank between an open position and a closed position.

[0016] According to some embodiments of the present invention, the oral irrigator further includes: a water-electricity separation structure disposed in the receiving space, the water-electricity separation structure dividing the receiving space into a liquid storage chamber and a mounting chamber, the water-electricity separation structure and the body being connected by fasteners and a snap-fit ​​structure, the snap-fit ​​structure including at least one slot and at least one snap-fit, the slot being formed on one of the water-electricity separation structure and the body, the snap-fit ​​being disposed on the other of the water-electricity separation structure and the body, the snap-fit ​​engaging with the slot.

[0017] According to some embodiments of the present invention, the water-electricity separation structure includes: a mounting base having an opening, and a buckle or a slot disposed on the mounting base; a first housing disposed on one side of the mounting base, with a water inlet formed at the end of the first housing away from the mounting base, the water inlet communicating with the liquid storage cavity, the first housing and the body being connected by the fastener; and a second housing disposed on the other side of the mounting base, with the end of the second housing adjacent to the first housing open and communicating with the opening, the inner wall surface of the second housing and the inner wall surface of the body jointly defining the mounting cavity, and the outer wall surface of the second housing, the inner wall surface of the first housing, and the inner wall surface of the water tank jointly defining the liquid storage cavity.

[0018] According to some embodiments of the present invention, at least one first sealing element is provided between the outer peripheral surface of the mounting base and the inner wall surface of the body; and / or at least one second sealing element is provided between the outer peripheral surface of the water inlet and the inner wall of the injection port.

[0019] According to some embodiments of the present invention, a water pump mounting housing is provided in the second chamber, the core assembly is connected to the water-electricity separation structure through the water pump mounting housing, at least one sliding groove is formed on the inner wall of the body, and at least a portion of the water pump mounting housing is slidably fitted in the sliding groove to install the water pump mounting housing into the body.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of a water flosser according to an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of a water flosser according to an embodiment of the present invention;

[0024] Figure 3 yes Figure 2 Enlarged view of section B shown in the center circle;

[0025] Figure 4 This is a schematic diagram of the body of a water flosser according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the water tank of a dental flosser according to an embodiment of the present invention;

[0027] Figure 6 yes Figure 5 Enlarged view of section C, shown in the center circle;

[0028] Figure 7 This is a schematic diagram of the locking assembly of a water flosser according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the water-electricity separation structure of a dental flosser according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the water-electricity separation structure of the oral irrigator and the water pump mounting housing according to an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the body of the water flosser according to an embodiment of the present invention from another angle.

[0032] Figure label:

[0033] 100. Water flosser;

[0034] 1. Body; 11. Liquid reservoir; 12. Mounting cavity;

[0035] 121. First chamber; 122. Second chamber;

[0036] 123. Mechanism components; 1231. Water pump; 1232. Battery;

[0037] 1233. Circuit board; 124. Water pump mounting housing;

[0038] 13. Through hole; 14. Drain outlet; 15. Fitting groove;

[0039] 16. Card slot; 17. Limiting slot;

[0040] 2. Inlet component; 21. Liquid injection port; 22. Sewage discharge channel; 23. Guide hole;

[0041] 3. Locking assembly; 31. Fixing block; 311. First through hole; 312. Limiting part;

[0042] 32. Pushing component; 321. Second through hole;

[0043] 33. Elastic element; 34. Base; 35. Mating block;

[0044] 4. Water spray pipe; 5. Button; 6. Cover;

[0045] 7. Water tank; 71. Capacity space;

[0046] 72. First water tank; 721. Matching protrusion; 722. Groove;

[0047] 7221. First groove; 7222. Second groove; 723. Limiting rib; 724. Clearance groove;

[0048] 73. Second water tank; 731. Protrusion;

[0049] 8. Water and electricity separation structure; 81. Buckle structure; 811. Buckle;

[0050] 82. Mounting base; 821. Opening; 822. First seal;

[0051] 83. First housing; 831. Water inlet; 832. Second seal;

[0052] 84. Second shell. Detailed Implementation

[0053] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-10A water flosser 100 according to an embodiment of the present invention is described.

[0054] like Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, the oral irrigator 100 according to an embodiment of the present invention includes a body 1, an inlet 2, a locking assembly 3, a water spray pipe 4, and a button 5.

[0055] Specifically, the body 1 defines a liquid storage chamber 11 and a mounting chamber 12. Thus, before using the water flosser 100, liquid, such as water, can be injected into the liquid storage chamber 11. The mounting chamber 12 can be used to install relevant components of the water flosser 100, facilitating its normal use. The mounting chamber 12 has an independent first chamber 121 and a second chamber 122, with the mechanism assembly 123 housed in the second chamber 122. Therefore, when liquid from outside the water flosser 100 flows into the first chamber 121, it is less likely to flow from the first chamber 121 into the second chamber 122. This prevents liquid flowing from the body 1 into the first chamber 121 from contacting the mechanism assembly 123, promoting its long-term use and extending its service life. Furthermore, it reduces the risk of electrical leakage from the mechanism assembly 123, improving the safety of the water flosser 100.

[0056] Reference Figure 1 and Figure 4 The body 1 has a through hole 13 and a drain outlet 14, and the through hole 13 is connected to the first chamber 121 along a first direction (e.g., Figure 2 (In the direction indicated by the middle arrow A) the through holes 13 are arranged at intervals and are connected to the liquid storage chamber 11. The inlet 2 is located at the through hole 13 and has an injection port 21. The injection port 21 is connected to the liquid storage chamber 11. The outer peripheral surface of the inlet 2 and the inner wall of the through hole 13 define a sewage discharge channel 22, which is connected to the sewage discharge port 14.

[0057] For example, in Figure 4In the example, a through hole 13 is formed at the upper end of the body 1, and the inlet 2 is located at the through hole 13 and connected to the body 1. Before using the water flosser 100, the user can inject liquid, such as water, into the reservoir 11 through the injection port 21. The injection operation is convenient, making the water flosser 100 easy to use. During the use of the water flosser 100, the wastewater flowing out of the user's mouth is likely to fall into the injection port 21. By setting a drain channel 22 around the injection port 21, the wastewater can flow along the drain channel 22 to the drain port 14 and fall out after flowing out of the drain port 14. Thus, the wastewater generated during the use of the water flosser 100 is less likely to flow into the reservoir 11 from the injection port 21, effectively ensuring the cleanliness of the liquid in the reservoir 11, making the water flosser 100 cleaner and more hygienic, and improving the user experience. Moreover, the use of the water flosser 100 is also more convenient, improving the performance of the water flosser 100. When liquid is injected into the storage chamber 11 through the injection port 21, the liquid is prone to spilling outside the injection port 21. At this time, the liquid spilled outside the injection port 21 flows through the drain channel 22 and the drain port 14, and falls off along the outer periphery of the body 1. This keeps the body 1 relatively clean during and after use, thereby improving the user experience. In addition, the drain channel 22 has a simple structure and is easy to manufacture, which is beneficial to the production and processing of the oral irrigator 100.

[0058] Combination Figure 4 A guide hole 23 is provided between the sewage discharge channel 22 and the first chamber 121, and the first chamber 121 and the sewage discharge channel 22 are connected through the guide hole 23. For example, in Figure 4 In the example, the guide hole 23 extends in the left-right direction (i.e., the first direction), with its right end connected to the first chamber 121 and its left end connected to the drain channel 22. When liquid or residual water from outside the water flosser 100 flows into the first chamber 121, the liquid can flow through the guide hole 23 into the drain channel 22 and out from the drain port 14. Therefore, liquid does not easily accumulate in the first chamber 121, and the liquid in the first chamber 121 can be discharged to the outside of the device 1 in a timely manner, reducing bacterial growth in the first chamber 121 and further improving the safety of using the water flosser 100.

[0059] like Figure 1 and Figure 2 As shown, the locking assembly 3 is located in the first chamber 121. The side wall of the base 34 of the locking assembly 3 is sealed to the inner wall of the first chamber 121. The locking assembly 3 can be switched between a locked position and an unlocked position. One end of the water spray pipe 4 passes through the body 1 and is detachably connected to the locking assembly 3, and extends through the locking assembly 3 into the second chamber 122, connecting to the water pump part 1231 of the mechanism assembly 123. For example, in Figure 2In the example, the water spray pipe 4 extends along the vertical direction of the body 1, and the lower end of the water spray pipe 4 passes through the first chamber 121 and the locking assembly 3 and extends into the second chamber 122 and is sealed to the water pump part 1231.

[0060] This design serves two purposes. First, during the insertion and removal of the water spray pipe 4, residual water at the lower end of the water spray pipe 4 is less likely to flow into the second chamber 122 through the gap between the water spray pipe 4 and the water pump part 1231. This prevents residual water from coming into contact with other electrical components of the mechanism assembly 123, reducing damage to these components and extending the lifespan of the mechanism assembly 123 and the oral irrigator 100. Second, the connection between the lower end of the water spray pipe 4 and the water pump part 1231 facilitates the flow of liquid from the reservoir 11 through the water pump part 1231 into the water spray pipe 4, allowing it to flow smoothly out for cleaning the user's teeth. Furthermore, the locking component 3's switchable position between locked and unlocked positions facilitates smooth insertion and removal of the water spray pipe 4, making its use more convenient. In addition, by sealing the side wall of the base 34 of the locking assembly 3 with the inner wall of the first chamber 121, the liquid in the first chamber 121 is less likely to flow into the second chamber 122 from the gap between the inner wall of the first chamber 121 and the base 34 of the locking assembly, thereby improving the sealing performance of the first chamber 121.

[0061] Reference Figure 7 Button 5 passes through the body 1 and is slidably connected to the locking assembly 3 to control the locking assembly 3 to switch between locking and unlocking the water spray pipe 4. The angle between the central axis of button 5 and the central axis of the water spray pipe 4 is acute. When installing the water spray pipe 4, push button 5 to switch the locking assembly 3 to the unlocked position, and the water spray pipe 4 passes through the body 1 and is placed inside the locking assembly 3. Release button 5, and the locking assembly 3 switches to the locked position. When removing the water spray pipe 4, push button 5, and button 5 pushes the locking assembly 3 to the unlocked position, allowing the water spray pipe 4 to be pulled out. Figure 2 and Figure 7 As shown, button 5 is installed at an angle on body 1. At this time, the angle between the central axis of button 5 and the vertical central axis of locking assembly 3 is an acute angle, meaning the angle between the central axis of button 5 and the central axis of water spray pipe 4 is also an acute angle. Therefore, when button 5 is pressed, the force on button 5 is decomposed into a vertical force and a horizontal force. The horizontal force can push locking assembly 3 to move horizontally, allowing locking assembly 3 to switch between the locked and unlocked positions.

[0062] Specifically, in combination Figure 2 and Figure 7When installing the water spray hose 4, the user can hold the body 1 and press the button 5 downwards with their thumb. The force on the button 5 is decomposed into a vertical force and a horizontal force. The button 5 can tilt downwards towards the locking assembly 3 and slide on it. Simultaneously, the horizontal force pushes the locking assembly 3 horizontally, switching it from the locked position to the unlocked position. At this point, the user can insert the water spray hose 4 through the body 1 into the locking assembly 3. After placing the hose 4, release the button 5. The locking assembly 3 and button 5 will reset, and the locking assembly 3 will switch to the locked position, thus securing the water spray hose 4. Therefore, while ensuring the locking assembly 3 can smoothly switch between the locked and unlocked positions, it improves the user's comfort when installing and removing the water spray hose 4. Furthermore, the locking assembly 3 has a simple structure, and compared to the vertical pressing method, it avoids misalignment and failure, ensuring the service life of the water flosser 100.

[0063] According to an embodiment of the present invention, the oral irrigator 100, through the combined action of the guide hole 23 and the drain channel 22, allows liquid flowing from the body 1 into the first chamber 121 to flow smoothly through the guide hole 23, the drain channel 22, and the drain port 14 before exiting the body 1. This prevents liquid accumulation in the first chamber 121, reducing bacterial growth and improving the safety of the oral irrigator 100. Furthermore, when the spray pipe 4 is removed, the probability of liquid flowing back into the pump section 1231 in the first chamber 121 is reduced, improving the cleanliness of the pump section 1231 and the liquid storage chamber 11, making it more hygienic and reassuring for the user, thus enhancing the user experience. Additionally, the sealed connection between the base 34 and the inner wall of the body 1 reduces the risk of liquid flowing into the second chamber 122 and damaging other electrical components of the core assembly 123, thereby extending the service life of the core assembly 123 and the oral irrigator 100. In addition, compared with the traditional water flosser 100, the water spray pipe 4 can be installed and removed through simple operation, which improves the user's comfort when installing and removing the nozzle. Moreover, the locking component 3 has a simple structure. Compared with the vertical pressing method, the locking component 3 can avoid the phenomenon of misalignment failure, which is more conducive to the use of the water flosser 100.

[0064] According to some embodiments of the present invention, with reference to Figure 4 The drain channel 22 extends obliquely from the guide hole 23 toward the drain outlet 14, and the bottom wall of the drain channel 22 extends obliquely toward the adjacent liquid storage chamber 11, with the sidewall of the drain channel 22 being curved. For example, in Figure 2 and Figure 4In the example, the bottom wall of the drain channel 22 extends downwards at an angle. This design allows liquid in the first chamber 121 to flow along the guide hole 23 to the drain channel 22, where it can flow along the angled extension of the drain channel 22 to the drain outlet 14. This facilitates the flow of liquid within the drain channel 22 and allows for smooth discharge of the liquid to the outside of the machine body 1. Furthermore, the curved sidewalls of the drain channel 22 prevent liquid from easily remaining on the sidewalls when present, allowing it to flow to the bottom wall and then smoothly exit from the drain outlet 14. This reduces liquid accumulation within the drain channel 22 and also reduces bacterial growth. It should be noted that the angle of inclination of the drain channel 22 can be specifically set according to actual needs to better meet practical applications.

[0065] Optionally, combined Figure 2 The surface of the base 34 adjacent to the center of the first chamber 121 is higher than the bottom wall of the guide hole 23. That is, the upper surface of the base 34 is above the bottom wall of the guide hole 23. This arrangement facilitates the flow of liquid from the first chamber 121 into the guide hole 23 when liquid is present in the first chamber 121, thereby facilitating the outflow of liquid from the first chamber 121 through the drain port 14. The base 34 extends obliquely from the first chamber 121 toward the guide hole 23 and from one side surface toward the second chamber 122. For example, in... Figure 2 In the example, the upper surface of the base 34 slopes downwards from right to left. Therefore, the liquid in the first chamber 121 can flow along the slope of the upper surface of the base 34 to the guide hole 23, allowing the liquid to flow smoothly between the first chamber 121 and the guide hole 23. This prevents liquid accumulation in the first chamber 121, maintaining a relatively clean environment and reducing bacterial growth. It should be noted that the distance between the side surface of the base 34 adjacent to the center of the first chamber 121 and the bottom wall of the guide hole 23 can be specifically set according to requirements to better meet practical applications.

[0066] According to some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the oral irrigator 100 further includes a cover 6, which is pivotally connected to the body 1 and is fitted at the inlet 21 to open and close the inlet 21. For example, in Figure 2In the example, the right side of the cover 6 is pivotally connected to the top of the body 1. When the cover 6 is separated from the injection port 21, the injection port 21 is opened, allowing the user to inject liquid into the reservoir 11. When the cover 6 is engaged with the injection port 21, the injection port 21 is closed, and the cover 6 is positioned above the drain channel 22. This configuration simplifies the opening and closing of the injection port 21, facilitating the use of the oral irrigator 100. Furthermore, the cover 6 acts as a shield for the drain channel 22, preventing dust accumulation and improving the cleanliness of the drain channel 22. When the cover 6 closes the injection port 21, there is a gap between the side of the cover 6 adjacent to the drain port 14 and the drain port 14. Therefore, when the cover 6 closes the liquid inlet 21, the drain outlet 14 is connected to the drain channel 22 through the above-mentioned gap. The liquid flowing from the first chamber 121 into the drain channel 22 can still flow to the drain outlet 14 and flow out from the drain outlet 14. Thus, the cover 6 is less likely to affect the drain outlet 14 or obstruct the flow of liquid, which is conducive to the smooth discharge of liquid from the drain channel 22 from the drain outlet 14, and is more conducive to the normal use of the oral irrigator 100.

[0067] Furthermore, in conjunction with 7, the locking assembly 3 includes a fixing block 31, a mating block 35, and a pushing member 32. The fixing block 31 and the mating block 35 are both connected to one side surface of the base 34 adjacent to the center of the first chamber 121. A first through hole 311 is formed on the fixing block 31. The mating block 35 is located at one end of the fixing block 31 adjacent to the button 5. The button 5 is slidably connected to the mating block 35. The pushing member 32 is slidably disposed on the fixing block 31, and one end of the pushing member 32 away from the button 5 is connected to the housing through an elastic member 33. A second through hole 321 is formed on the pushing member 32. The second through hole 321 communicates with the first through hole 311. One end of the water spray pipe 4 passes through the second through hole 321 and the first through hole 311 and extends into the second chamber 122.

[0068] like Figure 2 , Figure 3 and Figure 7 As shown, the pusher 32 is installed on the side of the fixed block 31 adjacent to the water spray pipe 4. The button 5 passes through the body 1 and engages with the mating block 35, and is movable relative to the mating block 35. The side of the pusher 32 away from the button 5 is connected to the inner wall of the body 1 through the elastic member 33. The side of the pusher 32 adjacent to the button 5 abuts against the button 5, so that when the button 5 slides on the mating block 35, the button 5 can push the pusher 32 to slide. When the button 5 is pressed, the pusher 32 moves under the action of the button 5 (e.g., Figure 7The button 5 is then released, causing the elastic element 33 to compress until the pusher 32 is pushed to the unlocked position. At this point, the water spray pipe 4 can be installed on or removed from the locking assembly 3. The button 5 is then released, and the elastic element 33 begins to recover its elastic deformation under the action of the restoring force, simultaneously pushing the pusher 32 and the button 5 back to their initial positions, thus switching the locking assembly 3 to the locked position. This allows for the installation and removal of the water spray pipe 4 in a simple and convenient manner.

[0069] It should be noted that a sealing ring is provided between the lower end of the water spray pipe 4 and the inner wall support of the second through hole 321. The sealing ring is fitted onto the lower end of the water spray pipe 4. This can enhance the sealing between the water spray pipe 4 and the second through hole 321, prevent high-impact water flow from overflowing from the gap between the water spray pipe 4 and the second through hole 321, and avoid water leakage when the user uses the water flosser 100.

[0070] Optionally, refer to Figure 7 The fixing block 31 has two limiting parts 312, which are located on both sides of the fixing block 31 and are arranged opposite each other. The pushing member 32 is located between the two limiting parts 312 and is slidable relative to the limiting parts 312. Thus, the limiting parts 312 limit the pushing member 32, improve the accuracy of the movement of the pushing member 32, thereby improving the accuracy of locking and unlocking of the locking assembly 3, and further improving the accuracy of installing and removing the water spray pipe 4, which is more conducive to the use of the water flosser 100.

[0071] According to some embodiments of the present invention, with reference to Figure 1 The oral irrigator 100 further includes a water tank 7, one end of which is open. The body 1 extends into the water tank 7 from the aforementioned end, and the water tank 7 and the body 1 together define a receiving space 71. For example, in... Figure 1 In the example, the water tank 7 is located below the body 1, and the upper end of the water tank 7 is open. A part of the body 1 can extend into and connect to the water tank 7 from the upper end. This effectively utilizes the internal space of the body 1 and the water tank 7, making the water flosser 100 more compact, convenient to use, and portable. Multiple mating grooves 15 are formed on one of the water tank 7 and the body 1, and multiple mating protrusions 721 are provided on the other of the water tank 7 and the body 1. The multiple mating protrusions 721 respectively fit into the multiple mating grooves 15. In the description of this invention, "multiple" means two or more. Specifically, mating grooves 15 may be formed on the outer peripheral surface of the body 1, and mating protrusions 721 (such as...) may be provided on the inner wall of the water tank 7. Figure 1(As shown in the figure); or, a mating groove 15 is formed on the inner wall of the water tank 7, and a mating protrusion 721 (not shown in the figure) is provided on the outer peripheral surface of the body 1. Thus, through the engagement of the mating protrusion 721 and the mating groove 15, the body 1 and the water tank 7 can be detachably connected, making installation and disassembly convenient and facilitating cleaning of the water tank 7 by the user. Furthermore, the structure of the mating protrusion 721 and the mating groove 15 is simple and easy to manufacture.

[0072] Optionally, refer to Figure 1 and Figure 5 The body 1 forms a limiting groove 17, and the inner wall of the water tank 7 is provided with a limiting rib 723. The limiting rib 723 protrudes from the end face of the water tank 7 in the axial direction. The limiting rib 723 fits into the limiting groove 17, and the end face of the limiting groove 17 abuts against the end face of the water tank 7. For example, in Figure 1 and Figure 5 In the example, the body 1 may have multiple limiting grooves 17 in the circumferential direction. The multiple limiting grooves 17 are evenly spaced along the circumferential direction of the body 1. Each limiting groove 17 extends along the axial direction of the body 1. The water tank 7 is provided with multiple limiting ribs 723 on one side adjacent to the body 1. The multiple limiting ribs 723 are evenly spaced along the circumferential direction of the water tank 7. Each limiting rib 723 protrudes from the inner wall of the water tank 7 toward the body 1. The multiple limiting ribs 723 correspond one-to-one with the multiple limiting grooves 17. During installation, the water tank 7 can be fitted onto the body 1 from the bottom and pushed upwards until the limiting rib 723 engages with the limiting groove 17. At this point, the end face of the water tank 7 abuts against the end face of the limiting groove 17, and the water tank 7 is properly installed. This prevents the user from pushing the water tank 7 upwards further and improves the sealing at the connection between the water tank 7 and the body 1, preventing wastewater from entering the water tank 7 during rinsing and preventing water from flowing out of the water tank 7. When the user pulls the water tank 7 downwards forcefully, causing the limiting rib 723 to disengage from the limiting groove 17, the water tank 7 can be separated from the body 1 for cleaning.

[0073] Furthermore, combined Figure 5 The water tank 7 includes a first water tank 72 and a second water tank 73. Multiple mating protrusions 721 are located on the inner wall of the first water tank 72. Multiple mating grooves 15 are formed on the outer peripheral surface of the body 1. The second water tank 73 is located on the side of the first water tank 72 away from the body 1. At least a portion of the second water tank 73 is located inside the first water tank 72. One end of the second water tank 73 is slidably connected to the inner wall of the first water tank 72. The second water tank 73 can switch between an open position and a closed position. During the switch from the closed position to the open position, the other end of the second water tank 73 moves away from the first water tank 72. During the switch from the open position to the closed position, the other end of the second water tank 73 moves towards the adjacent first water tank 72.

[0074] For example, such as Figure 5 As shown, the first water tank 72 can be a hollow structure with both ends axially connected. The outer diameter of the second water tank 73 is slightly smaller than the inner diameter of the first water tank 72. The first water tank 72 can be fitted onto the second water tank 73. When force is applied to the second water tank 73, it can move along the axial direction (i.e., vertical direction) of the first water tank 72, thus switching the second water tank 73 between the open and closed positions. When the user uses the oral irrigator 100, the second water tank 73 can be pulled down, causing most of the second water tank 73 to extend out of the first water tank 72. At this time, the second water tank 73 is in the open position, and the water storage space of the oral irrigator 100 is a space through which the first water tank 72 and the second water tank 73 are connected. The user can inject water into the storage chamber 11 through the liquid inlet 21 of the body 1, and then hold the first water tank 72 to perform oral irrigation. After rinsing, the second water tank 73 can be pushed into the first water tank 72 until it can no longer be pushed upwards. At this point, the second water tank 73 is in the closed position, retracting and reducing the size of the water flosser 100 for easier carrying. Furthermore, when the second water tank 73 retracts into the first water tank 72, its bottom extends beyond the first water tank 72. Applying force to the extended portion allows the second water tank 73 to be pulled out or retracted relative to the first water tank 72, reducing user contact with the rest of the second water tank 73 and minimizing bacterial growth. In addition, both the first and second water tanks 72 and 73 are pull-out, making the water flosser 100 convenient to use and facilitating cleaning of the water tanks, ensuring hygienic use.

[0075] According to some embodiments of the present invention, in combination Figure 5 and Figure 6 One of the first water tank 72 and the second water tank 73 has a plurality of grooves 722 formed thereon, and the plurality of grooves 722 are arranged at intervals along the axial direction of the first water tank 72. The other of the first water tank 72 and the second water tank 73 is provided with a protrusion 731, and the protrusion 731 cooperates with one of the plurality of grooves 722.

[0076] Reference Figure 5 and Figure 6Along the axial direction of the first water tank 72, on the same axis of the inner wall surface of the first water tank 72, two grooves 722 can be provided, which can be located at the two ends of the axial direction of the first water tank 72 respectively. Along the circumference of the first water tank 72, on the same circumference of the first water tank 72, three grooves 722 can be provided. Similarly, along the circumference of the second water tank 73, on the same circumference of the second water tank 73, three protrusions 731 can be provided at intervals. During the installation of the second water tank 73 and the first water tank 72, when the protrusion 731 engages with the groove 722 at the bottom of the first water tank 72, the second water tank 73 is in the open position, allowing both the first and second water tanks to store water for flossing. When the second water tank 73 is pushed upwards, the protrusion 731 disengages from the groove 722 and slides upwards along the axial direction of the first water tank 72 until it engages with the groove 722 at the top of the first water tank 72. At this point, the second water tank 73 is in the closed position, with most of it retracted within the first water tank 72, reducing the size of the flosser 100 and making it easier to carry. When the second water tank 73 is in the closed position, one end extends outside the first water tank 72, allowing the user to apply force to pull the second water tank 73 out of the first water tank 72. Furthermore, the protrusion 731 and the groove 722 have a simple structure, low cost, and require no other components, further reducing the production cost of the flosser 100.

[0077] Optionally, such as Figure 5 and Figure 6 As shown, among the multiple grooves 722, the groove 722 furthest from the body 1 is the first groove 7221, and the remaining grooves 722 are the second grooves 7222. In the axial direction of the first water tank 72, the side wall of the first groove 7221 adjacent to the body 1 extends obliquely towards the body 1. When the protrusion 731 is engaged with the first groove 7221, the second water tank 73 is in the open state. The side wall of the first groove 7221 furthest from the body 1 is horizontally set, which can effectively support the protrusion 731 and improve the stability of the second water tank 73 in the open state. The side wall of the first groove 7221 adjacent to the body 1 is an upwardly inclined slope, which can act as a guide, facilitating the pushing of the second water tank 73 into the first water tank 72 when force is applied. After the second water tank 73 is pulled out of the first water tank 72, a large pulling force can be applied to deform the side wall of the first groove 7221 away from the body 1, so that the protrusion 731 separates from the first groove 7221, thereby completing the disassembly of the second water tank 73 and making it easier to clean the second water tank 73.

[0078] In the axial direction of the first water tank 72, the side wall of the second groove 7222 away from the body 1 extends obliquely in the direction away from the body 1. When the protrusion 731 is engaged with the second groove 7222, the second water tank 73 is in a retracted state. The side wall of the second groove 7222 adjacent to the body 1 is horizontally set, which can effectively prevent the second water tank 73 from excessively retracting within the first water tank 72, and improve the stability of the second water tank 73 when closed. The side wall of the second groove 7222 away from the body 1 is an inclined surface that can act as a guide, which is conducive to applying force to pull out the second water tank 73.

[0079] According to some embodiments of the present invention, in combination Figure 5 and Figure 6 A clearance groove 724 is provided between two adjacent grooves 722, extending axially along the first water tank 72. A protrusion 731 is adapted to move along the clearance groove 724 between adjacent grooves 722, allowing the second water tank 73 to switch between open and closed positions. When the second water tank 73 slides within the first water tank 72, the protrusion 731 slides within the clearance groove 724, providing movement space and preventing interference between the second water tank 73 and the inner wall of the first water tank 72. Simultaneously, the clearance groove 724 extends obliquely away from the center of the first water tank 72 on both side walls axially, guiding the protrusion 731 and ensuring smooth entry into the first groove 7221. This makes the opening and closing of the second water tank 73 smoother and more conducive to the use of the oral irrigator 100.

[0080] According to some embodiments of the present invention, with reference to Figures 8-10 It further includes a water-electricity separation structure 8, which is disposed in the receiving space 71 and divides the receiving space 71 into a liquid storage chamber 11 and an installation chamber 12. For example, in Figure 1 In the example, the water-electricity separation structure 8 is installed within the receiving space 71, dividing the receiving space 71 into an independent liquid storage chamber 11 and a mounting chamber 12. The mounting chamber 12 houses the water pump 1231, the circuit board, and the battery 1232. This effectively utilizes the space inside the body 1 and the water tank 7. The mounting chamber 12 can accommodate components of the water flosser 100, such as the water pump 1231, the circuit board, and the battery 1232.

[0081] Combination Figure 1 ,as well as Figure 8 and Figure 9The water-electricity separation structure 8 and the body 1 are connected by fasteners (not shown) and a snap-fit ​​structure 81. The snap-fit ​​structure 81 includes at least one slot 16 and at least one snap 811. The slot 16 is formed on one of the water-electricity separation structure 8 and the body 1, and the snap 811 is provided on the other. The snap 811 engages with the slot 16. When assembling the water-electricity separation structure 8 and the body 1, it can be connected to the body 1 first through the snap-fit ​​structure 81, and then fixed by the fasteners. Thus, the assembly operation of the water-electricity separation structure 8 and the body 1 is simple through the engagement of the snap 811 and the slot 16, which can improve the assembly efficiency of the water flosser 100, thereby improving the production efficiency of the water flosser 100, and also facilitates the disassembly of the water-electricity separation structure 8. In addition, it also reduces the number of fasteners and lowers the production cost of the water flosser 100. Furthermore, the water-electricity separation structure 8 separates the liquid storage chamber 11 from the mounting chamber 12 (i.e., water and electricity are separated within the water flosser 100). Liquid in the liquid storage chamber 11 is less likely to flow into the mounting chamber 12, thus reducing damage to the circuit board and battery 1232 within the mounting chamber 12 and further extending the service life of the water flosser 100. Moreover, the rational layout and compact structure of the components of the water flosser 100 allow it to be manufactured in a relatively small size, making it convenient to use and carry.

[0082] According to some embodiments of the present invention, with reference to Figure 8 and Figure 9 The water-electricity separation structure 8 includes a mounting base 82, a first housing 83, and a second housing 84. An opening 821 is formed on the mounting base 82, and a buckle 811 or a slot 16 is provided on the mounting base 82. The first housing 83 is located on one side of the mounting base 82, and a water inlet 831 is formed at the end of the first housing 83 away from the mounting base 82. The water inlet 831 communicates with the liquid storage chamber 11. The first housing 83 and the body 1 are connected by fasteners. For example, in... Figure 8 and Figure 9 In the example, the first housing 83 is connected to the upper side of the mounting base 82. Both the body 1 and the first housing 83 extend vertically, and a water inlet 831 is formed at the upper end of the first housing 83. Therefore, when the water-electricity separation structure 8 is installed inside the body 1 and the water tank 7, the user can inject liquid into the liquid storage chamber 11 through the water inlet 831, which facilitates the normal use of the water flosser 100. Furthermore, only the first housing 83 is connected to the outer shell by fasteners; other parts of the water-electricity separation structure 8 do not require fasteners. This reduces the assembly difficulty of the water-electricity separation structure 8, reduces the number of fasteners used, and consequently lowers the production cost of the water flosser 100.

[0083] Combination Figure 8 and Figure 9The second housing 84 is located on the other side of the mounting base 82. One end of the second housing 84 adjacent to the first housing 83 is open and communicates with the opening 821. The inner wall surface of the second housing 84 and the inner wall surface of the body 1 together define the mounting cavity 12. The outer wall surface of the second housing 84, the inner wall surface of the first housing 83, and the inner wall surface of the water tank 7 together define the liquid storage cavity 11. For example, in... Figure 8 and Figure 9 In the example, the second housing 84 is located below the mounting base 82 and extends vertically. The upper end of the second housing 84 is open and communicates with the opening 821 of the mounting base 82. Thus, the water pump 1231, circuit board, and battery 1232 can extend into the second housing 84 through the opening 821, which facilitates the installation of the water pump 1231, circuit board, and battery 1232, and reduces contact between the water pump 1231, circuit board, and battery 1232 and the liquid in the storage chamber 11, improving the safety of the water pump 1231, circuit board, and battery 1232. Furthermore, the water-electricity separation structure 8 has a simple structure, resulting in a simple structure for the water flosser 100, which is beneficial for mass production of the water flosser 100.

[0084] According to some embodiments of the present invention, such as Figure 8 and Figure 9 As shown, at least one first seal 822 is provided between the outer peripheral surface of the mounting base 82 and the inner wall surface of the body 1. And / or, at least one second seal 832 is provided between the outer peripheral surface of the water inlet 831 and the inner wall of the liquid injection port 21.

[0085] The above-mentioned first seal 822 and second seal 832 are provided in the following three cases:

[0086] First, at least one first sealing element 822 is provided between the outer peripheral surface of the mounting base 82 and the inner wall surface of the body 1. For example, the first sealing element 822 is connected to the outer peripheral surface of the mounting base 82. As a result, when the water-electricity separation structure 8 is installed in the body 1 and the water tank 7, the liquid in the liquid storage chamber 11 on the lower side of the mounting base 82 is less likely to flow from the gap between the outer peripheral surface of the mounting base 82 and the inner wall surface of the body 1 into the mounting cavity 12, thereby further reducing the probability of liquid contact with the components in the mounting cavity 12, further improving the safety of the oral irrigator 100, and further extending the service life of the oral irrigator 100.

[0087] Secondly, at least one second seal 832 is provided between the outer peripheral surface of the inlet 831 and the inner wall of the injection port 21. Thus, by providing at least one second seal 832 between the inner wall of the injection port 21 and the outer peripheral surface of the inlet 831, the second seal 832 can fill the gap between the inner wall of the injection port 21 and the outer peripheral surface of the inlet 831. Therefore, during the process of injecting liquid into the storage chamber 11, liquid is less likely to flow into the mounting cavity 12 from the gap between the injection port 21 and the inlet 831, which is more conducive to the normal use of components in the mounting cavity 12, such as the water pump assembly, the battery 1232, and the circuit board 1233.

[0088] Third, at least one first seal 822 is provided between the outer peripheral surface of the mounting base 82 and the inner wall surface of the body 1, and at least one second seal 832 is provided between the outer peripheral surface of the water inlet 831 and the inner wall of the liquid injection port 21 (e.g. Figure 8 and Figure 9 With this design, during the process of injecting liquid into the liquid storage chamber 11, the liquid is less likely to flow into the mounting chamber 12 from the gap between the injection port 21 and the water inlet 831. At the same time, the liquid in the liquid storage chamber 11 on the lower side of the mounting base 82 is less likely to flow into the mounting chamber 12 from the gap between the outer peripheral surface of the mounting base 82 and the inner wall surface of the body 1. This further reduces the probability of liquid contact with the components in the mounting chamber 12, further improves the safety of the oral irrigator 100, and further extends the service life of the oral irrigator 100.

[0089] According to some embodiments of the present invention, with reference to Figure 8 and Figure 9 The second chamber 122 contains a water pump mounting housing 124, and the core assembly 123 is connected to the water-electricity separation structure 8 through the water pump mounting housing 124. For example, in Figure 8 and Figure 9In the example, the water pump 1231, battery 1232, and circuit board 1233 are all fixed to the water pump mounting housing 124. Thus, the water pump mounting housing 124 can be used to install and fix the water pump 1231, which is beneficial for the long-term stable use of the water pump 1231, and also for the fixation of the battery 1232 and circuit board 1233. At least one groove (not shown) is formed on the inner wall of the body 1, and at least a portion of the water pump mounting housing 124 is slidably fitted into the groove to install the water pump mounting housing 124 into the body 1. Therefore, through the cooperation of at least a portion of the water pump mounting housing 124 with the groove, when the water pump is installed on the water-electricity separation structure 8, it facilitates the connection and assembly of the water pump mounting housing 124 with the body 1, thereby facilitating the assembly of the water-electricity separation structure 8 with the body 1. Moreover, the chute can also guide the water pump mounting housing 124, shortening the assembly time between the water-electric separation structure 8 and the water pump mounting housing 124, thereby improving the assembly efficiency of the components in the mounting cavity 12 and the water-electric separation structure 8, and further improving the assembly efficiency of the water flosser 100.

[0090] Other configurations and operations of the oral irrigator 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0091] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0092] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0093] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An oral irrigator characterized by, The utility model relates to a water gun, comprising: a body, a liquid storage cavity and a mounting cavity are defined in the body, the mounting cavity has a first chamber and a second chamber which are independent of each other, a movement assembly is arranged in the second chamber, a through hole and a drain hole are formed on the body, the through hole is arranged in the first direction and is spaced apart from the first chamber, and the through hole is communicated with the liquid storage cavity; an inlet part is arranged at the through hole, a liquid injection hole is formed on the inlet part, the liquid injection hole is communicated with the liquid storage cavity, a drain channel is defined between the outer circumferential surface of the inlet part and the inner wall of the through hole, the drain channel is communicated with the drain hole, a flow guide hole is arranged between the drain channel and the first chamber, and the first chamber and the drain channel are communicated through the flow guide hole; a locking assembly is arranged in the first chamber, the base side wall of the locking assembly is sealingly connected with the inner wall of the first chamber, and the locking assembly can be switched between a locking position and an unlocking position; a water jet pipe is detachably connected with the locking assembly through the body and extends into the second chamber through the locking assembly to be connected with a water pump part of the movement assembly; a button part is slidably connected with the locking assembly through the body to control the switching of the locking assembly between locking the water jet pipe and unlocking the water jet pipe, and the included angle between the central axis of the button part and the central axis of the water jet pipe is an acute angle.

2. The oral irrigator of claim 1, wherein, The bottom wall of the drain channel is inclinedly extended from the flow guide hole to the drain hole, and the side wall of the drain channel is formed as a curved surface.

3. The oral irrigator of claim 1, wherein, The side surface of the base adjacent to the center of the first chamber is higher than the bottom wall of the flow guide hole, and the side surface of the base is inclinedly extended from the first chamber to the second chamber.

4. The waterpik of claim 1, wherein, Further comprising: a cover body is pivotally connected with the body, the cover body can be matched at the liquid injection hole to open and close the liquid injection hole, and when the cover body closes the liquid injection hole, the side surface of the cover body adjacent to the drain hole has a gap with the drain hole.

5. The waterpik of claim 1, wherein, The locking assembly comprises: a fixed block is connected with the side surface of the base adjacent to the center of the first chamber, and a first through hole is formed on the fixed block; a matching block is connected with the side surface of the base adjacent to the center of the first chamber, and the matching block is located at one end of the fixed block adjacent to the button part, and the button part is slidably connected with the matching block; a pushing part is slidably arranged on the fixed block, one end of the pushing part away from the button part is connected with the body through an elastic part, a second through hole is formed on the pushing part, the second through hole is communicated with the first through hole, and the one end of the water jet pipe extends into the second chamber through the second through hole and the first through hole.

6. The oral irrigator of any one of claims 1-5, wherein, Further comprising: A water tank, one end of the water tank being open, the machine body extending into the water tank from the one end of the water tank, the water tank and the machine body jointly defining a containing space, one of the water tank and the machine body being provided with a plurality of matching grooves, the other of the water tank and the machine body being provided with a plurality of matching protrusions, the plurality of matching protrusions being respectively matched in the plurality of matching grooves.

7. The oral irrigator of claim 6, wherein, The water tank comprises: A first water tank, the plurality of matching protrusions being located on an inner wall of the first water tank, the machine body being provided with the plurality of matching grooves on an outer circumferential surface of the machine body; A second water tank, the second water tank being located on a side of the first water tank away from the machine body, at least a portion of the second water tank being located in the first water tank, one end of the second water tank being slidably connected to the inner wall of the first water tank, the second water tank being switchable between an open position and a closed position, wherein, in a process of switching from the closed position to the open position, the other end of the second water tank moves in a direction away from the first water tank, in a process of switching from the open position to the closed position, the other end of the second water tank moves in a direction towards the first water tank.

8. The oral irrigator of claim 7, wherein, One of the first water tank and the second water tank is provided with a plurality of recesses, the plurality of recesses being spaced apart along an axial direction of the first water tank, the other of the first water tank and the second water tank being provided with a protrusion, the protrusion being matched with one of the plurality of recesses.

9. The oral irrigator of claim 8, wherein, The recess away from the machine body in the plurality of recesses is a first recess, and the rest of the recesses are second recesses, In the axial direction of the first water tank, a side wall adjacent to the machine body of the first recess extends in a direction towards the machine body; In the axial direction of the first water tank, a side wall away from the machine body of the second recess extends in a direction away from the machine body.

10. The oral irrigator of claim 8, wherein, An avoiding groove is provided between adjacent two recesses, the avoiding groove extending along the axial direction of the first water tank, the protrusion being adapted to move along the avoiding groove between adjacent two recesses, so as to switch the second water tank between the open position and the closed position.

11. The oral irrigator of claim 6, wherein, Further comprising: A water and electricity separation structure, the water and electricity separation structure being provided in the containing space, the water and electricity separation structure separating the containing space into a liquid storage cavity and a mounting cavity, the water and electricity separation structure and the machine body being connected through a fastener and a buckle structure, the buckle structure comprising at least one buckle slot and at least one buckle, the buckle slot being formed on one of the water and electricity separation structure and the machine body, the buckle being provided on the other of the water and electricity separation structure and the machine body, the buckle being matched with the buckle slot.

12. The oral irrigator of claim 11, wherein, The water and electricity separation structure comprises: A mounting seat, the mounting seat being provided with an opening, the buckle or the buckle slot being provided on the mounting seat; A first shell, the first shell being provided on one side of the mounting seat, one end of the first shell away from the mounting seat being provided with a water inlet, the water inlet being communicated with the liquid storage cavity, the first shell and the machine body being connected through the fastener; A second housing is arranged at the other side of the mounting base, an end of the second housing adjacent to the first housing is open and communicates with the opening, and an inner wall surface of the second housing and an inner wall surface of the machine body jointly define the mounting cavity, and an outer wall surface of the second housing, an inner wall surface of the first housing and an inner wall surface of the water tank jointly define the liquid storage cavity.

13. The oral irrigator of claim 12, wherein, At least one first sealing member is arranged between an outer peripheral surface of the mounting base and the inner wall surface of the machine body; and / or At least one second sealing member is arranged between an outer peripheral surface of the water inlet and an inner wall of the liquid injection port.

14. The oral irrigator of claim 11, wherein, A water pump mounting shell is arranged in the second cavity, the movement core assembly is connected to the water and electricity separation structure through the water pump mounting shell, at least one sliding groove is formed on the inner wall surface of the machine body, and at least a part of the water pump mounting shell is slidably matched in the sliding groove to mount the water pump mounting shell into the machine body.

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