Spray head assembly and oral irrigator

Abstract

The utility model relates to the technical field of tooth nursing tools, and provides a spray head assembly and a water pick, the spray head assembly comprises a shell, a spray head, a camera and a lens. The shell is provided with a water channel, a first mounting groove and a second mounting groove. A notch of the first mounting groove is located in the outer wall of the shell, and a notch of the second mounting groove is located in the groove bottom face of the first mounting groove. The spray head is connected to the shell and communicates with the water channel so that water entering the water channel can be sprayed out of the spray head. And the camera is connected in the second mounting groove and is used for shooting. The lens is arranged in the first installation groove, a supporting block is arranged on the groove bottom face, and the lens abuts against the side, away from the groove bottom face, of the supporting block so that a first gap can be formed between the lens and the groove bottom face. A large amount of glue can be left in the first gap, a small amount of glue is pressed out, and the glue left in the first gap forms a thick glue layer after being solidified. And the connection between the lens and the groove bottom surface of the first mounting groove is more stable.

Description

Technical Field

[0001] This application relates to the field of dental care tools, specifically to a nozzle assembly and a water flosser. Background Technology

[0002] An oral hygiene device is an electronic device used for oral cleaning and health, effectively removing food debris, bacteria, and plaque from the mouth. A water flosser is one type of oral hygiene device that uses a nozzle assembly to spray water to rinse and clean hard-to-reach areas such as between teeth and the gingival sulcus, using the force of the water flow to wash away plaque and food debris attached to the tooth surface.

[0003] To facilitate real-time observation of the cavity and the teeth, the nozzle assembly often includes a camera. The camera is housed within a mounting slot, and a lens encloses it for protection. The lens is glued to the mounting surface.

[0004] When installing the lens, glue is first applied to the lens mounting surface, and then the lens is pressed onto the lens mounting surface. At this time, a large amount of glue is squeezed out, resulting in only a small amount of glue remaining between the lens and the lens mounting surface, which makes the connection between the lens and the lens mounting surface less stable.

[0005] Therefore, how to solve or improve the problem of poor connection stability between the lens and the lens mounting surface caused by a large amount of glue being squeezed out when the lens is pressed onto the lens mounting surface has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, this application provides a nozzle assembly and a water flosser to solve or improve the problem that existing water flossers cause a large amount of glue to be squeezed out when the lens is pressed onto the lens mounting surface, resulting in poor connection stability between the lens and the lens mounting surface.

[0007] In a first aspect, this application provides a nozzle assembly, including:

[0008] The housing is provided with a water channel, a first mounting groove and a second mounting groove. The opening of the first mounting groove is located on the outer wall of the housing, and the opening of the second mounting groove is located on the bottom surface of the first mounting groove.

[0009] The nozzle is connected to the housing and communicates with the water channel;

[0010] A camera is connected to the second mounting slot and used for taking pictures;

[0011] A lens is disposed in the first mounting groove, the lens is located in the shooting direction of the camera, a support block is provided on the bottom surface of the groove, the lens abuts against the side of the support block away from the bottom surface of the groove to form a first gap between the lens and the bottom surface of the groove, the first gap being used to accommodate glue.

[0012] Optionally, at least two support blocks are provided, and the second mounting slot is located between the two support blocks (35).

[0013] Optionally, a second gap is provided between the sidewall of the lens and the inner sidewall of the first mounting groove, and the second gap increases sequentially in the direction toward the bottom surface of the groove.

[0014] Optionally, it also includes:

[0015] A bracket is attached to the inner wall of the second mounting slot, and the camera is attached to the bracket.

[0016] A supplementary light is connected to the bracket and located in the second mounting slot; the supplementary light is used to emit light.

[0017] A support plate is disposed in the second mounting slot and connected to the bracket. The support plate is provided with a first through hole and a second through hole. The camera is inserted into the first through hole and the fill light is inserted into the second through hole.

[0018] Optionally, it also includes:

[0019] A gasket is partially inserted into the second mounting slot and connected to the side of the support plate facing away from the bracket. The side of the gasket facing away from the support plate is connected to the lens. The gasket is provided with a third through hole and a fourth through hole. The camera can pass through the third through hole to take pictures, and the light emitted by the fill light can pass through the fourth through hole.

[0020] Secondly, this application also provides a dental flosser, including any of the nozzle assemblies described above.

[0021] Optionally, it also includes:

[0022] The body, wherein the nozzle assembly is connected to the body;

[0023] A water pump is installed inside the machine body, and the water pump is connected to the water channel of the nozzle assembly;

[0024] A water tank is used to store water. The water tank is connected to the machine body. The water pump is connected to the water tank and can pump water from the water tank to the waterway.

[0025] Optionally, it also includes:

[0026] A first sealing ring is connected to the outer wall of the machine body. The water tank has an opening, and the machine body is installed in the opening and inserted into the water tank. The side of the first sealing ring away from the outer wall of the machine body abuts against the inner wall of the water tank.

[0027] Optionally, it also includes:

[0028] The machine body is provided with a water inlet hole and a water inlet channel. The first end of the water inlet channel is connected to the water inlet hole, and the second end of the water inlet channel is connected to the inside of the water tank. The water inlet cover is detachably inserted into the water inlet hole and can cover the water inlet hole.

[0029] Optionally, it also includes:

[0030] The second sealing ring is provided in the body, which includes a body body, a middle cover and a top cover. The second sealing ring is connected to the outer wall of the middle cover. The body body has an opening. The middle cover is inserted into the opening of the body body. The side of the second sealing ring away from the outer wall of the middle cover abuts against the inner wall of the body body.

[0031] The third sealing ring is connected to the outer wall of the middle cover. The upper cover is inserted into the body and is fitted onto the middle cover. The side of the third sealing ring away from the outer wall of the middle cover abuts against the inner wall of the upper cover.

[0032] This application provides a nozzle assembly in which a first mounting groove is formed by a downward groove cut into the outer wall of the top surface of the housing. A second mounting groove is formed downward on the bottom surface of the first mounting groove, with the opening of the second mounting groove located on the bottom surface of the first mounting groove. A support block is provided on the bottom surface of the first mounting groove. A lens is installed in the first mounting groove and abuts against the side of the support block away from the bottom surface of the groove, forming a first gap between the lens and the bottom surface of the groove. When installing the lens, adhesive is applied to the bottom surface of the first mounting groove. Due to the existence of the first gap, a large amount of adhesive can remain in the first gap while a small amount is pressed out. The adhesive remaining in the first gap solidifies to form a thicker adhesive layer, making the connection between the lens and the bottom surface of the first mounting groove more secure. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1This is an exploded view of a nozzle assembly according to an embodiment of this application;

[0035] Figure 2 This is a schematic diagram of the first and second mounting slots of a nozzle assembly according to an embodiment of this application;

[0036] Figure 3 This is a cross-sectional view of a nozzle assembly according to an embodiment of this application;

[0037] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0038] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0039] Figure 6 This is a schematic diagram of the structure of a dental flosser according to an embodiment of this application;

[0040] Figure 7 This is a cross-sectional view of a water flosser according to an embodiment of this application;

[0041] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0042] Figure 9 for Figure 7 Enlarged view of point D in the middle;

[0043] Figure 10 for Figure 7 Enlarged diagram of point E in the middle.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Nozzle; 2. Camera; 3. Housing; 31. Water channel; 32. First mounting slot; 33. Second mounting slot; 34. Slot bottom; 35. Support block; 4. Lens; 5. Bracket; 6. Fill light; 7. Support piece; 71. First perforation; 72. Second perforation; 8. Gasket; 81. Third perforation; 82. Fourth perforation; 9. First gap; 10. Second gap; 11. Body; 111. Body; 112. Middle cover; 113. Top cover; 114. Water inlet hole; 115. Water inlet channel; 12. Water pump; 13. Water tank; 14. Water inlet cap; 15. Control circuit board; 16. FPC circuit board; 17. First sealing ring; 18. Second sealing ring; 19. Third sealing ring; 20. Water pipe. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] The following is combined Figures 1 to 10 This describes an embodiment of the present application.

[0048] According to embodiments of this application, on the one hand, such as Figures 1 to 5 A nozzle assembly is provided, including: a housing 3, a nozzle 1, a camera 2, and a lens 4. The housing 3 has a water channel 31, a first mounting groove 32, and a second mounting groove 33. The water channel 31 is disposed within the housing 3. The nozzle 1 is connected to the housing 3, such that the nozzle 1 communicates with the water channel 31 within the housing 3. Thus, water entering the water channel 31 can be sprayed out from the nozzle 1.

[0049] A first mounting groove 32 is formed by cutting a groove downward on the outer wall of the top surface of the housing 3, and the opening of the first mounting groove 32 is located on the outer wall of the housing 3. A second mounting groove 33 is formed downward on the bottom surface 34 of the first mounting groove 32, and the opening of the second mounting groove 33 is located on the bottom surface 34 of the first mounting groove 32.

[0050] A support block 35 is provided on the bottom surface 34 of the first mounting groove 32, located on one side of the opening of the second mounting groove 33. The camera 2 is connected and installed in the second mounting groove 33. Then, glue is filled into the bottom surface 34 of the first mounting groove 32, ensuring the glue at least covers the side of the support block 35 away from the bottom surface 34 of the first mounting groove 32. The lens 4 is placed into the first mounting groove 32 until the side of the lens 4 closest to the bottom surface 34 of the first mounting groove 32 abuts against the side of the support block 35 away from the bottom surface 34 of the first mounting groove 32. At this point, the side of the lens 4 closest to the bottom surface 34 of the first mounting groove 32 contacts the glue. After the glue solidifies, the lens 4 is bonded to the bottom surface 34 of the first mounting groove 32 through the glue, thus fixing the lens 4 within the first mounting groove 32. At this point, the lens 4 is positioned in the shooting direction of the camera 4, allowing the camera 2 to take pictures through the lens 4. The lens 4 also protects the camera 2.

[0051] When the nozzle 1 is inserted into the mouth and aimed at the teeth, the camera 2 can be connected to a terminal such as a mobile phone through a remote communication module, so that the display terminal can display the image of the teeth captured by the camera 2 in real time, so that the user can use the nozzle 1 to spray water and accurately rinse the teeth according to the information displayed on the display terminal.

[0052] The presence of the support block 35 creates a first gap 9 between the lens 4 and the bottom surface 34 of the first mounting groove 32. During lens 4 installation, a small amount of adhesive on the bottom surface 34 of the first mounting groove 32 is pressed out, while a large amount remains in the first gap 9. The adhesive remaining in the first gap 9 solidifies to form a thicker adhesive layer, making the connection between the lens 4 and the bottom surface 34 of the first mounting groove 32 more stable.

[0053] The inner and outer surfaces of lens 4 are coated with anti-reflective and anti-transmittance films to improve light transmittance and enhance image clarity.

[0054] In an optional embodiment, the support block 35 is integrally connected to the bottom surface 34 of the first mounting groove 32. At least two support blocks 35 are provided to increase the stability of the support for the lens 4. One support block 35 is located on the first side of the opening of the second mounting groove 33, and the other support block 35 is located on the second side of the opening of the second mounting groove 33, with the first and second sides opposite each other. That is, the second mounting groove 33 is located between the two support blocks.

[0055] One support block 35 supports the portion of the lens 4 located on the first side of the opening of the second mounting groove 33, and another support block 35 supports the portion of the lens 4 located on the second side of the opening of the second mounting groove 33. This further increases the stability of the support for the lens 4.

[0056] like Figure 2 As shown, four support blocks 35 are provided, with two support blocks 35 located on the first side of the opening of the second mounting groove 33, and the other two support blocks 35 located on the second side of the second mounting groove 33. After the lens 4 is placed into the first mounting groove 32, the two support blocks 35 support the portion of the lens 4 located on the first side of the opening of the first mounting groove 32, and the other two support blocks 35 support the portion of the lens 4 located on the second side of the opening of the first mounting groove 32.

[0057] In order to facilitate the placement of the lens 4 into the first mounting groove 32, the lens 4 is usually slightly smaller than the first mounting groove 32, so that a second gap 10 is provided between the side wall of the lens 4 and the inner side wall of the first mounting groove 32.

[0058] In optional embodiments, such as Figure 5 As shown, a slope is provided on the outer surface of the lens 4, such that the distance between the outer surface of the lens 4 and the inner wall of the first mounting groove 32 increases sequentially in the direction towards the bottom surface 34, i.e., the second gap 10 increases sequentially. This makes the dimension of the lens 4 on the side facing the bottom surface 34 of the first mounting groove 32 smaller than the dimension of the lens 4 on the side away from the bottom surface 34 of the first mounting groove 32. This makes it easier to place the lens 4 into the first mounting groove 32.

[0059] Because the lens 4 can be more easily inserted into the first mounting slot 32, the dimension of the side of the lens 4 away from the bottom surface 34 of the first mounting slot 32 can be set larger. That is, the distance L between the outer wall of the lens 4 away from the bottom surface 34 of the first mounting slot 32 and the inner wall of the first mounting slot 32 can be set as small as possible, for example, it can be set to 0.03 mm, while the distance B between the outer wall of the lens 4 facing the bottom surface 34 of the first mounting slot 32 and the inner wall of the first mounting slot 32 can be set to 0.06 mm.

[0060] With this design, the gap between the lens 4 and the inner wall of the first mounting groove 32 is smaller at the groove opening, making the plane where the groove opening of the first mounting groove 32 is located flatter.

[0061] It is worth noting that glue can also be filled between the sidewall of the lens 4 and the inner sidewall of the first mounting groove 32 to increase stability.

[0062] In optional embodiments, such as Figures 1 to 4 As shown, the nozzle assembly also includes: a bracket 5, a supplementary light 6, and a support plate 7. The bracket 5 is fixedly connected to the inner wall of the second mounting groove 33. Both the camera 2 and the supplementary light 6 are connected to the bracket 5. The support plate 7 has a first through hole 71 and a second through hole 72. The support plate 7 is placed into the second mounting groove 33 until it abuts against the bracket 5. At this point, the camera 2 passes through the first through hole 71, and the supplementary light 6 passes through the second through hole 72.

[0063] In this way, the support piece 7 provides stability for the camera 2 and the fill light 6, wherein the shape of the first perforation 71 is consistent with the shape of the camera 2, and the shape of the second perforation 72 is consistent with the shape of the fill light 6.

[0064] Furthermore, such as Figure 1 and Figure 4 As shown, the nozzle assembly also includes a gasket 8. A portion of the gasket 8 is inserted into the second mounting groove 33 until the portion of the gasket 8 inserted into the second mounting groove 33 abuts against the support piece 7. At this point, the gasket 8 and the support piece 7 are in contact on the side facing away from the bracket 5. The remaining portion of the gasket 8, except for the portion inserted into the second mounting groove 33, extends into the first mounting groove 32. After the lens 4 is placed into the first mounting groove 32, the lens 4 abuts against the gasket 8, and the side of the gasket 8 facing away from the support piece 7 is connected to the lens 4. Thus, the lens 4 is connected to the bracket 5 sequentially through the gasket 8 and the support piece 7. The gasket 8 and the support piece 7 provide support between the lens 4 and the bracket 5, increasing the stability of the lens 4 and the bracket 5.

[0065] The gasket 8 can be made of EVA adhesive. The first side of the EVA adhesive is bonded to the bracket 5, and the second side of the EVA adhesive is bonded to the bracket 5 to further increase stability.

[0066] Furthermore, a third through hole 81 and a fourth through hole 82 are provided on the gasket 8. This allows the camera 2 to pass through the third through hole 81 for shooting, preventing the gasket 8 from obstructing the camera 2. The light emitted by the fill light 6 can pass through the fourth through hole 82, preventing the gasket 8 from obstructing the fill light 6.

[0067] It is worth noting that after the side of the gasket 8 close to the support plate 7 is pressed against the support plate 7, the side of the gasket 8 away from the support plate 7 is flush with the side of the support block 35 away from the bottom surface 34 of the first mounting groove 32, so as to ensure that the lens 4 can abut against the support plate 7 while abutting against the support block 35.

[0068] According to an embodiment of this application, another aspect provides a water flosser including any of the above-described nozzle assemblies. This nozzle assembly is capable of producing the effects of any of the above-described nozzle assemblies.

[0069] As an optional embodiment, such as Figure 6 and Figure 7 As shown, the oral irrigator also includes: a body 11, a water pump 12, and a water tank 13. The water pump 12 is located inside the body 11. The nozzle assembly is connected to the body 11, and the outlet of the water pump 12 is connected to the water channel 31 of the nozzle assembly via a pipe. The water tank 13 is connected to the body 11 and is used to hold water. The inlet of the water pump 12 is connected to the inside of the water tank 13 via a water pipe 20. Thus, starting the water pump 12 draws water from the water tank 13. The water enters the inlet of the water pump 12 through the water pipe 20 and flows out from the outlet, then is transported through the pipe to the water channel 31 of the nozzle assembly, and finally sprayed out through the nozzle 1 of the nozzle assembly.

[0070] Pump 12 is a plunger pump, which has a greater impact force and a faster response than a diaphragm pump.

[0071] like Figure 10 As shown, a control circuit board 15 is installed inside the body 11. The water pump 12 is electrically connected to the control circuit board 15, facilitating the control of the water pump 12's start and stop. A remote communication module is installed on the control circuit board 15. The camera 2 is connected to the control circuit board 15 via an FPC circuit board 16, facilitating the control of the camera 2's operation and image transmission.

[0072] In some embodiments, such as Figure 8 As shown, the oral irrigator also includes a first sealing ring 17. A first sealing groove is provided on the outer wall of the body 11, and the first sealing ring 17 is installed in the first sealing groove. The water tank 13 is a barrel-shaped device with a sealed bottom and an open top. The body 11 is inserted into the water tank 13 through the opening until the side of the first sealing groove away from the outer wall of the body 11 abuts against the inner wall of the water tank 13. At this time, the water tank 13 is connected to the body 11, and the first sealing groove plays a sealing role between the body 11 and the water tank 13, ensuring the water tank 13 is sealed.

[0073] Under normal conditions, the main body 11 is inserted into the bottom of the water tank 13, and its overall size is small, making it easy to carry and store. Before use, when water needs to be added to the water tank 13, the main body 11 is moved in the direction of being pulled out to increase the volume of the water tank 13. At this time, the first sealing groove remains between the main body 11 and the water tank 13 to provide a seal.

[0074] In some embodiments, such as Figure 7 and Figure 8 As shown, the oral irrigator also includes a water inlet cap 14. A water inlet channel 115 and a water inlet hole 114 are provided on the body 11. The water inlet channel 115 is arranged along the length of the body 11, and the first end of the water inlet channel 115 is connected to the water inlet hole 114. The second end of the water inlet channel 115 passes through the bottom of the body 11.

[0075] In this way, water is injected into the water inlet 114, and the water flows through the water inlet 114 into the water inlet channel 115, and then flows out from the bottom of the body 11 and into the water tank 13, making it more convenient to add water.

[0076] The water inlet cap 14 is inserted into the water inlet hole 114, thereby sealing the water inlet hole 114. When water needs to be added to the water tank 13, the water inlet cap 14 is removed from the water inlet hole 114, and water is poured into the water tank 13 through the water inlet hole 114. After filling, the water inlet cap 14 is reinserted into the water inlet hole 114 to prevent debris from entering and to prevent leakage.

[0077] In some embodiments, such as Figure 8 As shown, the water flosser also includes a second sealing ring 18 and a third sealing ring 19. The body 11 includes a main body 111, a middle cover 112, and a top cover 113. The top of the main body 111 has an opening, and the bottom of the middle cover 112 is inserted into the opening of the main body 111, thus connecting the middle cover 112 to the top of the main body 111. The bottom of the top cover 113 is fitted over the top of the middle cover 112, thus connecting the top cover 113 to the top of the middle cover 112. In this way, the main body 111, the middle cover 112, and the top cover 113 are connected sequentially from bottom to top to form the entire body 11.

[0078] The middle cover 112 has a second sealing groove and a third sealing groove on its bottom and top side walls, respectively. A second sealing ring 18 is installed in the second sealing groove, and a third sealing ring 19 is installed in the third sealing groove. After the bottom of the middle cover 112 is inserted into the opening at the top of the fuselage body 111, the side of the second sealing ring 18 away from the outer wall of the middle cover 112 abuts against the inner wall of the opening in the fuselage body 111. At this time, the second sealing ring 18 provides a seal between the middle cover 112 and the fuselage body 111.

[0079] After the bottom of the upper cover 113 is fitted onto the top of the middle cover 112, the side of the third sealing ring 19 away from the outer wall of the middle cover 112 abuts against the inner wall of the bottom of the upper cover 113. At this time, the third sealing ring 19 plays a sealing role between the upper cover 113 and the middle cover 112.

[0080] In this way, the installation of the second sealing ring 18 and the third sealing ring 19 increases the waterproof performance of the body 11.

[0081] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A showerhead assembly, comprising: The shell (3) is provided with a water channel (31), a first mounting groove (32) and a second mounting groove (33), the slot opening of the first mounting groove (32) is located on the outer wall of the shell (3), and the slot opening of the second mounting groove (33) is located on the slot bottom surface (34) of the first mounting groove (32); The nozzle (1) is connected to the shell (3) and communicates with the water channel (31); The camera (2) is connected in the second mounting groove (33) and is used for shooting; The lens (4) is arranged in the first mounting groove (32), the lens (4) is located in the shooting direction of the camera (2), the support block (35) is arranged on the slot bottom surface (34), the lens (4) is abutted with the side of the support block (35) away from the slot bottom surface (34), so as to form a first gap (9) between the lens (4) and the slot bottom surface (34), and the first gap (9) is used for accommodating glue. The support block (35) is provided with at least two, and the second mounting groove (33) is located between the two support blocks (35).

2. The showerhead assembly of claim 1, wherein, The second gap (10) is arranged between the side wall of the lens (4) and the inner side wall of the first mounting groove (32), and the second gap (10) increases in turn in the direction towards the slot bottom surface (34).

3. The showerhead assembly of claim 1, wherein, Further comprising:

4. The showerhead assembly of any of claims 1-3, wherein, The support (5) is connected to the inner wall of the second mounting groove (33), and the camera (2) is connected to the support (5); The light supplementing lamp (6) is connected to the support (5) and located in the second mounting groove (33), and the light supplementing lamp (6) is used for emitting light; The support sheet (7) is arranged in the second mounting groove (33) and connected with the support (5), the support sheet (7) is provided with a first perforation (71) and a second perforation (72), the camera (2) is inserted in the first perforation (71), and the light supplementing lamp (6) is inserted in the second perforation (72). Further comprising:

5. The showerhead assembly of claim 4, wherein, The gasket (8) is partially inserted in the second mounting groove (33) and connected with the side of the support sheet (7) away from the support (5), the side of the gasket (8) away from the support sheet (7) is connected with the lens (4), and the gasket (8) is respectively provided with a third perforation (81) and a fourth perforation (82), the camera (2) can shoot through the third perforation (81), and the light emitted by the light supplementing lamp (6) can pass through the fourth perforation (82). The nozzle (1) assembly of any one of claims 1-5 is included.

6. An oral irrigator characterized by, Further comprising:

7. The oral irrigator of claim 6, wherein, The machine body (11) is connected with the nozzle (1) assembly; The water pump (12) is arranged in the machine body (11) and communicates with the water channel (31) of the nozzle (1) assembly; The water tank (13) is used for storing water, the water tank (13) is connected with the machine body (11), the water pump (12) communicates with the water tank (13), and the water pump (12) can pump water in the water tank (13) to the water channel (31). Further comprising:

8. The oral irrigator of claim 7, wherein, ​ A first sealing ring (17) is connected to the outer wall of the machine body (11), the water tank (13) is provided with an opening, the machine body (11) is arranged in the opening and inserted into the water tank (13), and the side of the first sealing ring (17) away from the outer wall of the machine body (11) abuts against the inner wall of the water tank (13).

9. The oral irrigator of claim 8, wherein, Further comprising: A water injection cover (14) is arranged on the machine body (11), and the machine body (11) is provided with a water injection hole (114) and a water injection channel (115), the first end of the water injection channel (115) communicates with the water injection hole (114), the second end of the water injection channel (115) communicates with the inside of the water tank (13), and the water injection cover (14) is detachably inserted into the water injection hole (114) and can cover the water injection hole (114).

10. The oral irrigator of claim 7, wherein, Further comprising: A second sealing ring (18) is connected to the outer wall of the middle cover (112), the machine body (111) is provided with an opening, the middle cover (112) is inserted into the opening of the machine body (111), and the side of the second sealing ring (18) away from the outer wall of the middle cover (112) abuts against the inner wall of the machine body (111); A third sealing ring (19) is connected to the outer wall of the middle cover (112), the upper cover (113) is connected to the machine body (111), the upper cover (113) is sleeved on the middle cover (112), and the side of the third sealing ring (19) away from the outer wall of the middle cover (112) abuts against the inner wall of the upper cover (113).

Images