Water pick main machine with waterproof function and water pick

Abstract

The utility model discloses an oral irrigator main machine with a waterproof function and an oral irrigator, and relates to the technical field of oral irrigators, the oral irrigator main machine with the waterproof function comprises a shell, a first mounting hole and a second mounting hole, the shell is provided with an accommodating cavity, and the first mounting hole and the second mounting hole are respectively communicated with the accommodating cavity; the water pumping assembly is arranged in the containing cavity; the knob switch assembly comprises a knob piece; the water outlet pipe penetrates through the second mounting hole; the sealing assembly comprises a first sealing piece and a second sealing piece, the first sealing piece is arranged between the knob piece and the hole wall of the first mounting hole, and the second sealing piece is arranged between the water outlet pipe and the hole wall of the second mounting hole; the technical scheme provided by the utility model has the technical effects that the first sealing piece is arranged between the knob piece and the hole wall of the first mounting hole, and the second sealing piece is arranged between the water outlet pipe and the hole wall of the second mounting hole, so that the waterproof performance of the table type oral irrigator is improved.

Description

Technical Field

[0001] This utility model relates to the field of oral irrigator technology, and in particular to an oral irrigator main unit and oral irrigator with waterproof function. Background Technology

[0002] A countertop water flosser is a highly efficient, convenient, and effective oral hygiene tool suitable for daily home use. It effectively removes food debris and plaque from between teeth by providing high water pressure and a stable water flow. However, current countertop water flossers often have poor waterproofing, leading to leaks over time and potentially damaging the internal circuitry. Utility Model Content

[0003] The main purpose of this utility model is to propose a waterproof oral irrigator main unit and oral irrigator, aiming to improve the waterproof performance of the tabletop oral irrigator.

[0004] To achieve the above objectives, the present invention proposes a waterproof oral irrigator main unit, comprising a housing, having a receiving cavity and a first mounting hole and a second mounting hole respectively communicating with the receiving cavity, the first mounting hole being located on the outer side wall or top wall of the housing, and the second mounting hole being located on the bottom wall of the housing; a water pump assembly being located within the receiving cavity; a rotary switch assembly including a knob that passes through the first mounting hole; a water outlet pipe passing through the second mounting hole and communicating with the water pump assembly; a sealing assembly including a first sealing element and a second sealing element, the first sealing element being located between the knob and the wall of the first mounting hole to seal the gap between the knob and the outer side wall of the housing, and the second sealing element being located between the water outlet pipe and the wall of the second mounting hole to seal the gap between the water outlet pipe and the outer side wall of the housing; and a controller electrically connected to the rotary switch assembly and the water pump assembly.

[0005] In one embodiment, the first sealing member includes a first connecting section and a first limiting section and a second limiting section disposed on both sides of the first connecting section. A first mounting groove is formed between the first limiting section, the second limiting section and the first connecting section. The first sealing member is connected and fixed to the wall of the first mounting hole through the first mounting groove.

[0006] And / or, the second seal includes a second connecting section and a third limiting section and a fourth limiting section disposed on both sides of the second connecting section, a second mounting groove is formed between the third limiting section, the fourth limiting section and the second connecting section, and the second seal is connected and fixed to the wall of the second mounting hole through the second mounting groove.

[0007] In one embodiment, the rotary switch assembly further includes a connector and a circuit board, the circuit board being electrically connected to the controller, the connector being electrically connected to the circuit board, the first mounting hole being located on the outer side wall of the housing away from the pump assembly, the connector having a first connecting portion passing through the first mounting hole, the first connecting portion being threadedly connected to the knob, and the first seal having a third mounting hole, the first seal being connected and fixed to the outer peripheral wall of the first connecting portion through the third mounting hole.

[0008] In one embodiment, the waterproof oral irrigator main unit further includes an electrical connection cable, the sealing assembly further includes a third seal, the bottom wall of the housing is provided with a fourth mounting hole, and the third seal is disposed between the electrical connection cable and the wall of the fourth mounting hole, so as to seal the electrical connection cable and the outer wall of the housing.

[0009] In one embodiment, the housing includes a first outer shell and a second outer shell. The outer wall of the first outer shell near the second outer shell has a first groove, and the outer wall of the second outer shell near the first outer shell has a second connecting portion. The second connecting portion is inserted into the connecting first groove to seal the first outer shell and the second outer shell together.

[0010] In one embodiment, the waterproof oral irrigator main unit further includes a fastener, a connecting post is provided on the side of the first housing near the second housing, and the bottom wall of the second housing has a fifth mounting hole adapted to the connecting post, and the fastener passes through the fifth mounting hole and is locked to the connecting post.

[0011] In one embodiment, the second outer casing has a second groove on the side opposite to the second connecting portion, the second mounting hole is disposed on the bottom wall of the second groove, and the water outlet pipe is disposed in the second groove.

[0012] In one embodiment, the sealing assembly further includes a fourth sealing element, the inner wall of the receiving cavity is provided with a mounting portion, the two ends of the pump assembly have first connecting ends, the first connecting ends are provided with third connecting portions, the third connecting portions are connected to the fourth sealing element, and the fourth sealing element is connected and fixed to the mounting portion.

[0013] In one embodiment, the waterproof water flosser main unit further includes a charging component, and an installation space for installing the charging component is formed between the first housing and the second housing, the installation space being located on one side of the water pump component.

[0014] This utility model also proposes a water flosser, including a water tank, a nozzle assembly, and a water flosser main unit with waterproof function as described in any of the above embodiments. The water tank is connected to the water pump assembly, and the water pump assembly is connected to the nozzle assembly.

[0015] The technical solution of this utility model improves the waterproof performance of the tabletop water flosser by using a first sealing element between the knob and the wall of the first mounting hole, thereby sealing the gap between the knob and the outer wall of the housing, and by using a second sealing element between the water outlet pipe and the wall of the second mounting hole, thereby sealing the gap between the water outlet pipe and the outer wall of the housing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of a waterproof oral irrigator main unit according to an embodiment of the present invention;

[0018] Figure 2 A structural cross-sectional view of an embodiment of the waterproof oral irrigator main unit provided by this utility model;

[0019] Figure 3 A structural cross-sectional view of another embodiment of the waterproof oral irrigator main unit provided by this utility model;

[0020] Figure 4 A schematic diagram of the rotary switch assembly in one embodiment of the waterproof oral irrigator main unit provided by this utility model;

[0021] Figure 5 A schematic diagram of the structure of the first outer shell in one embodiment of the waterproof oral irrigator main unit provided by this utility model;

[0022] Figure 6 A schematic diagram of the structure of the second outer shell in one embodiment of the waterproof oral irrigator main unit provided by this utility model;

[0023] Figure 7 A schematic diagram of the structure of the first sealing element in one embodiment of the waterproof oral irrigator main unit provided by this utility model;

[0024] Figure 8A schematic diagram of the structure of the second sealing element in one embodiment of the waterproof oral irrigator main unit provided by this utility model.

[0025] Explanation of icon numbers:

[0026] 1. Housing; 11. Receiving cavity; 111. First mounting hole; 112. Second mounting hole; 113. Mounting part; 12. Fourth mounting hole; 13. First outer shell; 131. First groove; 132. Connecting post; 133. Second protrusion; 14. Second outer shell; 141. Second connecting part; 142. Fifth mounting hole; 143. Second groove; 144. First protrusion; 15. Mounting space; 2. Pump assembly; 21. First connecting end; 22. Third connecting part; 3. Rotary switch assembly; 31. Rotary knob Components; 32. Connector; 321. First connecting part; 33. Circuit board; 4. Water outlet pipe; 5. Sealing assembly; 51. First seal; 511. First connecting section; 512. First limiting section; 513. Second limiting section; 514. First mounting groove; 515. Third mounting hole; 52. Second seal; 521. Second connecting section; 522. Third limiting section; 523. Fourth limiting section; 524. Second mounting groove; 53. Third seal; 6. Electrical connection wire; 7. Fastener; 8. Charging assembly.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] This utility model proposes a water flosser main unit with waterproof function.

[0032] Please see Figures 1 to 3 In one embodiment of this utility model, the waterproof oral irrigator main unit includes a housing 1, a water pump assembly 2, a rotary switch assembly 3, a water outlet pipe 4, a sealing assembly 5, and a controller; the housing 1 has a receiving cavity 11 and a first mounting hole 111 and a second mounting hole 112 respectively communicating with the receiving cavity 11, the first mounting hole 111 being located on the outer side wall or top wall of the housing 1, and the second mounting hole 112 being located on the bottom wall of the housing 1; the water pump assembly 2 is located inside the receiving cavity 11; the rotary switch assembly 3 includes a knob 31, the knob 31 passing through the first mounting hole 111. The water outlet pipe 4 passes through the second mounting hole 112 and is connected to the water pump assembly 2. The sealing assembly 5 includes a first sealing element 51 and a second sealing element 52. The first sealing element 51 is disposed between the knob 31 and the hole wall of the first mounting hole 111 to seal the gap between the knob 31 and the outer wall of the housing 1. The second sealing element 52 is disposed between the water outlet pipe 4 and the hole wall of the second mounting hole 112 to seal the gap between the water outlet pipe 4 and the outer wall of the housing 1. The controller is electrically connected to the knob switch assembly 3 and the water pump assembly 2 respectively.

[0033] The technical solution of this utility model uses a first sealing element 51 disposed between the knob 31 and the hole wall of the first mounting hole 111, thereby sealing the gap between the knob 31 and the outer wall of the housing 1. By using a second sealing element 52 disposed between the water outlet pipe 4 and the hole wall of the second mounting hole 112, the second sealing element 52 seals the gap between the water outlet pipe 4 and the outer wall of the housing 1, thereby improving the waterproof performance of the tabletop water flosser and preventing water leakage during long-term use.

[0034] In this embodiment, the first mounting hole 111 is used for mounting the knob 31, and the second mounting hole 112 is used for mounting the water outlet pipe 4. The first mounting hole 111 is located on the outer wall or top wall of the housing 1, making it easier for the user to operate the knob 31. The second mounting hole 112 is located on the bottom wall of the housing 1, so that the water outlet pipe 4 can be installed on the bottom wall of the housing 1. During the water extraction process, the water can be simultaneously subjected to its own gravity and the power provided by the water pump assembly 2, thereby improving the water output efficiency of the water pump assembly 2. To prevent external water from seeping into the interior of the housing 1 through the knob switch assembly 3 or the first mounting hole 111, the first sealing member 51 can be located between the knob 31 and the hole wall of the first mounting hole 111, thereby improving the sealing between the knob 31 and the outer wall of the housing 1. Specifically, the first sealing element 51 can be sleeved on the wall of the first mounting hole 111, and the knob 31 passes through the first sealing element 51, thereby sealing the gap between the knob 31 and the outer wall of the housing 1, thus preventing external water from seeping into the interior of the housing 1 through the knob switch assembly 3 or the first mounting hole 111. To prevent external water from seeping into the interior of the housing 1 through the gap between the water outlet pipe 4 and the first mounting hole 111, the second sealing element 52 can be disposed between the wall of the water outlet pipe 4 and the second mounting hole 112, thereby improving the sealing performance between the water outlet pipe 4 and the outer wall of the housing 1. Specifically, the second sealing element 52 can be sleeved on the wall of the second mounting hole 112, and the water outlet pipe 4 passes through the second sealing element 52, thereby sealing the gap between the water outlet pipe 4 and the outer wall of the housing 1, thus preventing external water from seeping into the interior of the housing 1 through the gap between the water outlet pipe 4 and the outer wall of the housing 1. The controller is electrically connected to the rotary switch assembly 3 and the water pump assembly 2 respectively. The user can generate a first signal by rotating the knob 31 and send it to the controller. The controller receives the first signal and controls the water pump assembly 2 to work, thereby causing the water pump assembly 2 to draw water from the water tank (not shown) through the water outlet pipe 4 to the nozzle assembly (not shown).

[0035] like Figure 7 and Figure 8As shown, the first sealing member 51 includes a first connecting section 511 and a first limiting section 512 and a second limiting section 513 disposed on both sides of the first connecting section 511. A first mounting groove 514 is formed between the first limiting section 512, the second limiting section 513 and the first connecting section 511. The first sealing member 51 is connected and fixed to the wall of the first mounting hole 111 through the first mounting groove 514.

[0036] And / or, the second sealing member 52 includes a second connecting section 521 and a third limiting section 522 and a fourth limiting section 523 disposed on both sides of the second connecting section 521. A second mounting groove 524 is formed between the third limiting section 522, the fourth limiting section 523 and the second connecting section 521. The second sealing member 52 is connected and fixed to the wall of the second mounting hole 112 through the second mounting groove 524.

[0037] In this embodiment, the first limiting segment 512 is located on the side of the second limiting segment 513 away from the receiving cavity 11. The outer diameters of the first limiting segment 512 and the second limiting segment 513 can be larger than the diameter of the first mounting hole 111, respectively. The outer diameter of the first limiting segment 512 can be larger than the outer diameter of the second limiting segment 513, thereby allowing the first limiting segment 512 and the second limiting segment 513 to better fit the outer wall of the housing 1, and thus enabling the first sealing member 51 to better seal the gap between the knob member 31 and the outer wall of the housing 1. The first mounting groove 514 can be an annular groove. The first sealing member 51 is connected and fixed to the hole wall of the first mounting hole 111 through the first mounting groove 514, thereby improving the stability of the connection between the first sealing member 51 and the hole wall of the first mounting hole 111.

[0038] In this embodiment, the third limiting segment 522 is located on the side of the fourth limiting segment 523 away from the receiving cavity 11. The outer diameters of the third limiting segment 522 and the fourth limiting segment 523 can be larger than the diameter of the second mounting hole 112, and the outer diameter of the third limiting segment 522 can be larger than the outer diameter of the fourth limiting segment 523. This allows the third limiting segment 522 and the fourth limiting segment 523 to better fit the outer wall of the housing 1, thereby enabling the second sealing member 52 to better seal the gap between the water outlet pipe 4 and the outer wall of the housing 1. The second mounting groove 524 can be an annular groove. The second sealing member 52 is connected and fixed to the hole wall of the second mounting hole 112 through the second mounting groove 524, thereby improving the stability of the connection between the second sealing member 52 and the hole wall of the second mounting hole 112.

[0039] like Figure 4As shown, the rotary switch assembly 3 further includes a connector 32 and a circuit board 33. The circuit board 33 is electrically connected to the controller, and the connector 32 is electrically connected to the circuit board 33. The first mounting hole 111 is located on the outer side of the housing 1 away from the pump assembly 2. The connector 32 is provided with a first connecting part 321, which passes through the first mounting hole 111. The first connecting part 321 is threadedly connected to the knob 31. The first sealing member 51 has a third mounting hole 515, and the first sealing member 51 is connected and fixed to the outer peripheral wall of the first connecting part 321 through the third mounting hole 515.

[0040] In this embodiment, the waterproof water flosser main unit also includes a nut and a washer. The first connecting part 321 can be sequentially inserted through the first sealing member 51, the first mounting hole 111, the washer, and the nut, and is threadedly connected to the knob 31, thereby improving the stability of the connection between the knob 31 and the first connecting part 321. The first sealing member 51 may have a third mounting hole 515. The first sealing member 51 is connected and fixed to the outer peripheral wall of the first connecting part 321 through the third mounting hole 515, thereby improving the stability of the connection between the first sealing member 51 and the first connecting part 321. The first mounting hole 111 is located on the outer side of the housing 1 away from the pump assembly 2, which is conducive to the reasonable arrangement of the internal circuit lines of the housing 1, thereby reducing the cross interference or mechanical wear between multiple circuit lines. The controller is electrically connected to connector 32 and circuit board 33 respectively, so that the user can rotate knob 31 to make circuit board 33 generate a first signal and send it to the controller. The controller receives the first signal and controls the water pump assembly 2 to work, so that the water pump assembly 2 draws water from the water tank (not shown) through water outlet pipe 4 to nozzle assembly (not shown).

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the waterproof oral irrigator main unit also includes an electrical connection line 6, and the sealing assembly 5 also includes a third sealing element 53 (not shown). The bottom wall of the housing 1 is provided with a fourth mounting hole 12, and the third sealing element 53 is disposed between the electrical connection line 6 and the wall of the fourth mounting hole 12, so as to seal the electrical connection line 6 and the housing 1.

[0042] In this embodiment, the electrical connection wire 6 can be used to connect to an external power source. This application improves the sealing performance between the electrical connection wire 6 and the outer wall of the housing 1 by using a third sealing member 53 disposed between the electrical connection wire 6 and the wall of the fourth mounting hole 12.

[0043] like Figure 5 and Figure 6 As shown, the housing 1 includes a first outer shell 13 and a second outer shell 14. The outer wall of the first outer shell 13 near the second outer shell 14 is provided with a first groove 131. The outer wall of the second outer shell 14 near the first outer shell 13 is provided with a second connecting part 141. The second connecting part 141 is inserted into the connecting first groove 131 so that the first outer shell 13 and the second outer shell 14 are sealed together.

[0044] In this embodiment, in order to further improve the sealing performance of the first outer shell 13 and the second outer shell 14, the outer wall of the second outer shell 14 near the first outer shell 13 is provided with a second connecting part 141, and the outer wall of the first outer shell 13 near the second outer shell 14 is provided with a first groove 131. The second connecting part 141 is inserted into the first groove 131 so that the first outer shell 13 and the second outer shell 14 are sealed together, thereby improving the stability of the connection between the first outer shell 13 and the second outer shell 14.

[0045] like Figure 1 and Figure 5 As shown, the waterproof oral irrigator main unit also includes a fastener 7. The first housing 13 is provided with a connecting post 132 on the side near the second housing 14. The bottom wall of the second housing 14 has a fifth mounting hole 142 that is adapted to the connecting post 132. The fastener 7 passes through the fifth mounting hole 142 and is locked to the connecting post 132.

[0046] In this embodiment, the fastener 7 can be a bolt, screw, or other fastener 7. In order to improve the stability of the connection between the first housing 13 and the second housing 14, this application sets the fastener 7 to pass through the fifth mounting hole 142 and lock it to the connecting post 132, so that the first housing 13 can be detachably connected and fixed to the second housing 14, thereby improving the sealing performance of the first housing 13 and the second housing 14.

[0047] like Figure 2 and Figure 6 As shown, the second outer shell 14 has a second groove 143 on the side opposite to the second connecting part 141, the second mounting hole 112 is provided on the bottom wall of the second groove 143, and the water outlet pipe 4 is provided in the second groove 143.

[0048] In this embodiment, the second groove 143 is recessed from the outer wall of the second outer shell 14 away from the second connecting portion 141 and towards the side closer to the first outer shell 13. The second groove 143 provides space for the water outlet pipe 4 to be installed, thus making it easier to store the water outlet pipe 4. The second mounting hole 112 can be provided on the bottom wall of the second groove 143 near the first outer shell 13, thus making it easier to install the water outlet pipe 4 and making the water outlet pipe 4 more stably installed in the second groove 143.

[0049] like Figure 2 As shown, the waterproof water flosser main unit also includes a fourth sealing element. The inner sidewall of the receiving cavity 11 is provided with an installation part 113. The two ends of the water pump assembly 2 are provided with first connecting ends 21. The first connecting ends 21 are provided with third connecting parts 22. The third connecting parts 22 are connected to the fourth sealing element. The fourth sealing element is connected and fixed to the installation part 113.

[0050] In this embodiment, the fourth seal is disposed between the third connecting part 22 and the mounting part 113. The water pump assembly 2 is connected and fixed to the mounting part 113 through the third connecting part 22 and the fourth seal, so that the bottom end of the water pump assembly 2 can be spaced apart from the bottom wall of the second housing 14, forming an empty space. The bottom end of the water pump assembly 2 can be suspended in the receiving cavity 11, thereby reducing the number of resonant surfaces formed between the water pump assembly 2 and the housing 1, thereby improving the shock absorption effect of the water pump assembly 2, and thus improving the problem of excessive noise during operation of the water pump assembly 2.

[0051] like Figure 1 and Figure 2 As shown, the waterproof water flosser main unit also includes a charging component 8. An installation space 15 for installing the charging component 8 is formed between the first housing 13 and the second housing 14. The installation space 15 is located on one side of the water pump component 2.

[0052] In this embodiment, the bottom wall of the second outer shell 14 may be provided with a first protrusion 144, and the outer side wall of the first outer shell 13 may be provided with a second protrusion 133. The first protrusion 144 abuts against the second protrusion 133 to enclose and form an installation space 15. The installation space 15 is located on one side of the water pump assembly 2, and the charging assembly 8 is installed in the installation space 15. This allows for a more reasonable arrangement of the charging assembly 8 and the water pump assembly 2 within the receiving cavity 11, thereby improving the stability of the charging assembly 8 installed within the shell 1.

[0053] This utility model also proposes a water flosser, which includes a water tank, a nozzle assembly, and a waterproof water flosser main unit. The specific structure of the waterproof water flosser main unit is as described in the above embodiments. Since this water flosser adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The water tank is connected to the water pump assembly 2, and the water pump assembly 2 is connected to the nozzle assembly through a water outlet pipe 4, thereby facilitating the extraction of water from the water tank into the nozzle assembly.

[0054] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A water flosser main unit having a waterproof function, characterized by, The utility model relates to a shower device main machine with waterproof function, including: A shell has a containing cavity and first and second mounting holes in communication with the containing cavity respectively, the first mounting hole is arranged on the outer side wall or top wall of the shell, and the second mounting hole is arranged on the bottom wall of the shell; A pump water assembly is arranged in the containing cavity; A knob switch assembly includes a knob, which is arranged through the first mounting hole; A water outlet pipe is arranged through the second mounting hole, and the water outlet pipe is in communication with the pump water assembly; A sealing assembly includes first and second sealing members, the first sealing member is arranged between the knob and the hole wall of the first mounting hole to seal the gap between the knob and the outer side wall of the shell, and the second sealing member is arranged between the water outlet pipe and the hole wall of the second mounting hole to seal the gap between the water outlet pipe and the outer side wall of the shell; A controller is electrically connected to the knob switch assembly and the pump water assembly respectively.

2. The oral irrigator main unit having a waterproof function according to claim 1, wherein, The first sealing member includes a first connecting section and first and second limiting sections arranged on both sides of the first connecting section, a first mounting groove is formed between the first and second limiting sections and the first connecting section, and the first sealing member is connected and fixed with the hole wall of the first mounting hole through the first mounting groove. And / or, the second sealing member includes a second connecting section and third and fourth limiting sections arranged on both sides of the second connecting section, a second mounting groove is formed between the third and fourth limiting sections and the second connecting section, and the second sealing member is connected and fixed with the hole wall of the second mounting hole through the second mounting groove. 3.The oral irrigator main unit having a waterproof function of claim 2, wherein, The knob switch assembly further includes a connector and a circuit board, the circuit board is electrically connected to the controller, the connector is electrically connected to the circuit board, the first mounting hole is located on the side of the outer side wall of the shell away from the pump water assembly, the connector is provided with a first connecting part, the first connecting part is arranged through the first mounting hole, the first connecting part is threadedly connected to the knob, the first sealing member has a third mounting hole, and the first sealing member is connected and fixed with the outer peripheral wall of the first connecting part through the third mounting hole. 4.The oral irrigator main unit having a waterproof function of claim 1, wherein, The shower device main machine with waterproof function further includes an electric connection line, the sealing assembly further includes a third sealing member, the bottom wall of the shell is provided with a fourth mounting hole, and the third sealing member is arranged between the electric connection line and the hole wall of the fourth mounting hole to seal and connect the electric connection line and the outer side wall of the shell. 5.The oral irrigator main unit having a waterproof function of claim 1, wherein, The shell includes a first shell and a second shell, the first shell is provided with a first groove on the outer wall of the side close to the second shell, the second shell has a second connecting part on the outer wall of the side close to the first shell, the second connecting part is inserted into the first groove to seal and connect the first shell and the second shell. 6.The oral irrigator main unit having a waterproof function of claim 5, wherein, The shower device main machine with waterproof function further includes a fastener, the first shell is provided with a connecting column on the side close to the second shell, the bottom wall of the second shell has a fifth mounting hole matched with the connecting column, and the fastener is locked to the connecting column through the fifth mounting hole. 7.The oral irrigator main unit having a waterproof function of claim 5, wherein, The second housing has a second recess on the side away from the second connecting part, the second mounting hole is arranged on the bottom wall of the second recess, and the water outlet pipe is arranged in the second recess. 8.The oral irrigator main unit having a waterproof function of claim 5, wherein, The sealing assembly further comprises a fourth sealing member, an inner side wall of the accommodating cavity is provided with a mounting part, two ends of the water pumping assembly are provided with first connecting ends, the first connecting ends are provided with third connecting parts, the third connecting parts are connected to the fourth sealing member, and the fourth sealing member is connected and fixed with the mounting part. 9.The oral irrigator main unit having a waterproof function of claim 5, wherein, The oral irrigator main machine with the waterproof function further comprises a charging assembly, a mounting space for mounting the charging assembly is formed between the first housing and the second housing, and the mounting space is located on one side of the water pumping assembly.

10. An oral irrigator characterized by, The oral irrigator comprises a water tank, a nozzle assembly, and the oral irrigator main machine according to any one of claims 1 to 9, the water tank is communicated with the water pumping assembly, and the water pumping assembly is communicated with the nozzle assembly.

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