Water pick main machine and water pick

Abstract

The utility model discloses an oral irrigator main machine and an oral irrigator, and relates to the technical field of oral irrigators, the oral irrigator main machine is applied to the oral irrigator, the oral irrigator main machine comprises a shell, the shell is provided with a containing cavity, and the inner side wall of the containing cavity is provided with a matching part; the water pumping assembly is arranged in the containing cavity, and a connecting part is arranged on the peripheral side of the water pumping assembly; the connecting part is fixedly connected with the matching part through the buffering part, the buffering part is arranged between the connecting part and the matching part, the bottom end of the water pumping assembly and the bottom wall of the shell are arranged in a spaced mode, a vacant space is formed, and the bottom end of the water pumping assembly is in a suspended state in the containing cavity; the technical scheme provided by the utility model has the technical effects that the bottom end of the water pumping assembly and the bottom wall of the shell are arranged at an interval, and the vacant space is formed, so that the number of resonance surfaces formed between the water pumping assembly and the shell is reduced, and the shockproof effect of the water pumping assembly 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 an oral irrigator. Background Technology

[0002] A countertop water flosser is a device used for oral hygiene. It uses high-pressure water jets to spray between teeth and gums, thereby removing food debris and bacteria and effectively preventing periodontal disease and tooth decay. However, the pump components in existing countertop water flossers have poor shock absorption, resulting in excessive noise during operation, which does not meet user needs. Utility Model Content

[0003] The main purpose of this utility model is to provide a water flosser main unit and a water flosser, which aims to improve the shock resistance of the water pump assembly.

[0004] To achieve the above objectives, the present invention proposes a water flosser main unit, which is used in water flossers. The water flosser main unit includes a housing and has a receiving cavity, the inner side wall of which is provided with a mating part.

[0005] A water pump assembly is disposed within the receiving cavity, and a connecting portion is provided on the outer peripheral side of the water pump assembly;

[0006] A buffer is provided, wherein the connecting part is connected and fixed to the mating part through the buffer, the buffer is disposed between the connecting part and the mating part, the bottom end of the water pump assembly is spaced apart from the bottom wall of the housing and forms an empty space, and the bottom end of the water pump assembly is suspended in the receiving cavity.

[0007] In one embodiment, the pump assembly includes a first housing and a second housing connected to each other. The first housing has a first connecting end at both ends, and the second housing has a second connecting end at both ends. The connecting portion includes a first connecting portion and a second connecting portion. The first connecting portion is disposed at the first connecting end, and the second connecting portion is disposed at the second connecting end. The first connecting portion and the second connecting portion are respectively connected to the buffer member.

[0008] In one embodiment, one of the first connecting part and the buffer is provided with a first snap-fit ​​block, and the other is provided with a first snap-fit ​​groove corresponding to the first snap-fit ​​block. The first snap-fit ​​block snaps into the first snap-fit ​​groove so that the first connecting part and the buffer are snapped and fixed.

[0009] And / or, one of the second connecting part and the buffer member is provided with a second snap-fit ​​block, and the other is provided with a second snap-fit ​​groove corresponding to the second snap-fit ​​block. The second snap-fit ​​block snaps into the second snap-fit ​​groove so that the second connecting part and the buffer member are snapped and fixed.

[0010] In one embodiment, the buffer has a groove with an opening at one end, and limiting portions are provided on both sides of the buffer. The limiting portions are located in the opening, and the first connecting portion and the second connecting portion are connected in the groove. The limiting portions are used to prevent the first connecting portion and the second connecting portion from falling out of the opening.

[0011] In one embodiment, the housing includes a first outer shell and a second outer shell, which together form the receiving cavity. The inner sidewall of the first outer shell is provided with a first abutting portion, and the inner sidewall of the second outer shell is provided with a second abutting portion. The first abutting portion and the second abutting portion are disposed opposite to each other along a first direction, and together form the mating portion. The first abutting portion and the second abutting portion abut against the buffer member, so that the buffer member is connected and fixed to the mating portion.

[0012] In one embodiment, the first abutting portion includes a first abutting section and second abutting sections located on both sides of the first abutting section. The first abutting section and the second abutting portion abut against the buffer member respectively, and the two second abutting sections abut against the buffer member respectively.

[0013] In one embodiment, the second abutting portion includes a connecting segment and a plurality of third abutting segments, the plurality of third abutting segments being spaced apart from the connecting segment, and the first abutting segment and the plurality of third abutting segments respectively abutting the buffer member.

[0014] In one embodiment, the main body of the oral irrigator further includes a fastener, the first housing has a connecting post, the second housing has a mounting hole adapted to the connecting post, and the fastener passes through the mounting hole and is locked to the connecting post.

[0015] In one embodiment, the outer wall of the first housing near the second housing has a connecting groove, and the outer wall of the second housing near the first housing has a third connecting part, which is inserted into the connecting groove to connect and fix the first housing and the second housing.

[0016] This utility model also proposes a dental flosser, including a water tank, a nozzle assembly, and the dental flosser main unit described in any of the above embodiments, wherein the water tank is connected to the water pump assembly, and the water pump assembly is connected to the nozzle assembly.

[0017] The technical solution of this utility model adopts a buffer component between the connecting part and the mating part. The water pump assembly is connected and fixed to the mating part through the connecting part and the buffer component. The vibration generated by the water pump assembly can be offset by the elasticity of the buffer component. By setting the bottom end of the water pump assembly and the bottom wall of the housing at a distance to form an empty space, the bottom end of the water pump assembly is suspended in the receiving cavity, thereby reducing the number of resonant surfaces formed between the water pump assembly and the housing, thereby improving the shock absorption effect of the water pump assembly, and thus improving the problem of excessive noise during the operation of the water pump assembly. Attached Figure Description

[0018] 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.

[0019] Figure 1 A schematic diagram of the structure of an embodiment of the water flosser main unit provided by this utility model;

[0020] Figure 2 A structural cross-sectional view of an embodiment of the water flosser main unit provided by this utility model;

[0021] Figure 3 A cross-sectional view of the first and second outer shells in one embodiment of the oral irrigator main unit provided by this utility model;

[0022] Figure 4 A schematic diagram of the pump assembly in one embodiment of the oral irrigator main unit provided by this utility model;

[0023] Figure 5 A schematic diagram of the structure of the first outer shell in one embodiment of the water flosser main unit provided by this utility model;

[0024] Figure 6 A schematic diagram of the structure of the second outer shell in one embodiment of the water flosser main unit provided by this utility model;

[0025] Figure 7 A schematic diagram of the buffer component in one embodiment of the water flosser main unit provided by this utility model.

[0026] Explanation of icon numbers:

[0027] 1. Housing; 11. Receiving cavity; 111. Mating part; 12. First outer shell; 121. First abutting part; 1211. First abutting section; 1212. Second abutting section; 122. Connecting post; 123. Connecting groove; 13. Second outer shell; 131. Second abutting part; 1311. Connecting section; 1312. Third abutting section; 132. Mounting hole; 133. Third connecting part; 2. Pump assembly; 21. Connecting part; 211. First connecting part; 2111. First snap-fit ​​block; 212. Second connecting part; 2121. Second snap-fit ​​block; 22. First housing; 221. First connecting end; 23. Second housing; 231. Second connecting end; 24. Driver; 3. Buffer; 31. Opening; 32. Groove; 33. Limiting part; 4. Fastener.

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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.

[0032] This utility model proposes a main unit for a dental flosser.

[0033] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the main body of the water flosser is used in a water flosser. The main body of the water flosser includes a housing 1 and has a receiving cavity 11. The inner sidewall of the receiving cavity 11 is provided with a mating part 111.

[0034] A water pump assembly 2 is disposed within the receiving cavity 11, and a connecting portion 21 is provided on the outer peripheral side of the water pump assembly 2;

[0035] The buffer 3 is provided between the connecting part 21 and the mating part 111. The bottom end of the pump assembly 2 is spaced apart from the bottom wall of the housing 1 and forms an empty space. The bottom end of the pump assembly 2 is suspended in the receiving cavity 11.

[0036] The technical solution of this utility model adopts a buffer 3 between the connecting part 21 and the mating part 111. The pump assembly 2 is connected and fixed to the mating part 111 through the connecting part 21 and the buffer 3. The vibration generated by the pump assembly 2 can be offset by the elasticity of the buffer 3. By setting the bottom end of the pump assembly 2 at a distance from the bottom wall of the housing 1 and forming an empty space, the bottom end of the pump assembly 2 is suspended in the receiving cavity 11, thereby reducing the number of resonant surfaces formed between the pump assembly 2 and the housing 1, thereby improving the shock absorption effect of the pump assembly 2, and thus improving the problem of excessive noise during the operation of the pump assembly 2.

[0037] In this embodiment, the housing 1 may have a receiving cavity 11 for mounting components such as the water pump assembly 2. A mating part 111 may be provided on the side of the receiving cavity 11 near the water pump assembly 2. The mating part 111 can be used for mounting the buffer 3 and the water pump assembly 2. The water pump assembly 2 is installed inside the housing 1 and can be used to draw water from the water tank through an outlet pipe (not shown) to a nozzle assembly (not shown). The water pump assembly 2 refers to a device that can convert electrical energy or mechanical energy into fluid power. The water pump assembly 2 may include a driver 24 and a water pump (not shown), and the driver 24 drives the water pump to work, thereby drawing water from the water tank through the outlet pipe to the nozzle assembly. To facilitate the installation of the water pump assembly 2 within the receiving cavity 11, a connecting portion 21 is provided on the outer periphery of the water pump assembly 2. The connecting portion 21 on the water pump assembly 2 is fixedly connected to the mating portion 111 via a buffer member 3. This installation method allows the bottom end of the water pump assembly 2 to be spaced apart from the bottom wall of the housing 1, creating an empty space. This reduces the resonance surface between the water pump assembly 2 and the housing 1, thereby improving the shock absorption effect of the water pump assembly 2 and reducing the production cost of the water flosser. To improve the stability of the water pump assembly 2 within the receiving cavity 11, connecting portions 21 can be provided at both ends of the outer periphery of the water pump assembly 2, and mating portions 111 can be provided on the inner walls of both sides of the receiving cavity 11. The two connecting portions 21 are respectively connected and fixed to the two mating portions 111 one-to-one via two buffer members 3. When the bottom end of the pump assembly 2 is suspended within the receiving cavity 11, there are only two connection points between the pump assembly 2 and the housing 1. The vibration generated by the pump assembly 2 is transmitted to the buffer 3 through the connection part 21 and is offset by the elasticity of the buffer 3, thereby improving the resonance problem between the pump assembly 2 and the housing 1 and reducing the noise generated by the pump assembly 2 during operation. The buffer 3 can be configured as an elastic sealing element such as a silicone ring, so that the buffer 3 can also be used to seal the pump assembly 2, thereby improving the sealing performance of the pump assembly 2.

[0038] like Figures 1 to 4 As shown, the water pump assembly 2 includes a first housing 22 and a second housing 23 connected to each other. The first housing 22 has a first connecting end 221 at both ends, and the second housing 23 has a second connecting end 231 at both ends. The connecting part 21 includes a first connecting part 211 and a second connecting part 212. The first connecting part 211 is disposed at the first connecting end 221, and the second connecting part 212 is disposed at the second connecting end 231. The first connecting part 211 and the second connecting part 212 are respectively connected to the buffer member 3.

[0039] In this embodiment, the two sides of the first housing 22 are respectively connected and fixed to the mating part 111 via the first connecting part 211 and the buffer member 3, and the two sides of the second housing 23 are respectively connected and fixed to the mating part 111 via the second connecting part 212 and the buffer member 3, thereby improving the stability of the connection between the first housing 22 and the second housing 23, and thus improving the stability of the pump assembly 2 installed in the receiving cavity 11. This application uses the first connecting part 211 and the second connecting part 212 respectively connected to the buffer member 3, thereby sealing the connection between the first housing 22 and the second housing 23, and thus making the connection between the first housing 22 and the second housing 23 detachable, thereby facilitating the disassembly of the first housing 22 and the second housing 23.

[0040] like Figure 4 As shown, one of the first connecting part 211 and the buffer member 3 is provided with a first snap-fit ​​block 2111, and the other is provided with a first snap-fit ​​groove corresponding to the first snap-fit ​​block 2111. The first snap-fit ​​block 2111 snaps into the first snap-fit ​​groove (not shown) so that the first connecting part 211 and the buffer member 3 are snapped and fixed.

[0041] And / or, one of the second connecting part 212 and the buffer member 3 is provided with a second snap-fit ​​block 2121, and the other is provided with a second snap-fit ​​groove corresponding to the second snap-fit ​​block 2121. The second snap-fit ​​block 2121 snaps into the second snap-fit ​​groove (not shown) so that the second connecting part 212 and the buffer member 3 are snapped and fixed.

[0042] In this embodiment, to improve the stability of the connection between the first connecting part 211 and the buffer member 3, a snap-fit ​​fixing method can be adopted between the first connecting part 211 and the buffer member 3. Specifically, the first connecting part 211 may be provided with a first snap-fit ​​block 2111 or a first snap-fit ​​groove, and the buffer member 3 may be provided with a corresponding first snap-fit ​​groove or a first snap-fit ​​block 2111. The first snap-fit ​​block 2111 snaps into the first snap-fit ​​groove, so that the first connecting part 211 and the buffer member 3 are snap-fit ​​fixed. Preferably, the first connecting part 211 may be provided with a first snap-fit ​​block 2111, and the buffer member 3 may be provided with a corresponding first snap-fit ​​groove, and the first snap-fit ​​block 2111 on the first connecting part 211 snaps into the first snap-fit ​​groove.

[0043] In this embodiment, to improve the stability of the connection between the second connecting part 212 and the buffer member 3, a snap-fit ​​fixing method can be adopted between the second connecting part 212 and the buffer member 3. Specifically, the second connecting part 212 may be provided with a second snap-fit ​​block 2121 or a second snap-fit ​​groove, and the buffer member 3 may be provided with a corresponding second snap-fit ​​groove or a second snap-fit ​​block 2121. The second snap-fit ​​block 2121 snaps into the second snap-fit ​​groove, so that the second connecting part 212 and the buffer member 3 are snap-fit ​​fixed. Preferably, the second connecting part 212 may be provided with a second snap-fit ​​block 2121, and the buffer member 3 may be provided with a corresponding second snap-fit ​​groove, and the second snap-fit ​​block 2121 on the second connecting part 212 snaps into the second snap-fit ​​groove.

[0044] like Figure 7 As shown, the buffer 3 has a groove 32 with an opening 31 at one end, and limiting portions 33 are provided on both sides of the buffer 3. The limiting portions 33 are provided in the opening 31. The first connecting portion 211 and the second connecting portion 212 are connected in the groove 32. The limiting portion 33 is used to restrict the first connecting portion 211 and the second connecting portion 212 from falling off from the opening 31.

[0045] In this embodiment, in order to improve the stability of the connection between the buffer 3 and the first connecting part 211 and the second connecting part 212, limiting parts 33 may be provided on both sides of the buffer 3 at intervals. The two limiting parts 33 can respectively prevent the first connecting part 211 or the second connecting part 212 from moving toward the side closer to the opening 31, thereby improving the stability of the connection between the first connecting part 211 and the second connecting part 212 and the buffer 3.

[0046] like Figure 2 and Figure 3 As shown, the housing 1 includes a first outer shell 12 and a second outer shell 13. The first outer shell 12 and the second outer shell 13 enclose and form the receiving cavity 11. The inner sidewall of the first outer shell 12 is provided with a first abutting portion 121, and the inner sidewall of the second outer shell 13 is provided with a second abutting portion 131. The first abutting portion 121 and the second abutting portion 131 are arranged opposite to each other along a first direction. The first abutting portion 121 and the second abutting portion 131 enclose and form the mating portion 111. The first abutting portion 121 and the second abutting portion 131 respectively abut against the buffer member 3 so that the buffer member 3 is connected and fixed to the mating portion 111.

[0047] In this embodiment, the first direction may be consistent with the up and down direction. The mating part 111 may include a first abutting part 121 disposed on the inner sidewall of the first housing 12 and a second abutting part 131 disposed on the inner sidewall of the second housing 13. The first abutting part 121 and the second abutting part 131 are disposed opposite to each other along the first direction. The first abutting part 121 and the second abutting part 131 respectively abut against the buffer member 3, thereby improving the stability of the connection between the buffer member 3 and the mating part 111.

[0048] In this embodiment, the first abutting part 121 and the second abutting part 131 can surround a mating part 111 with a groove 32 shape, and the buffer 3 is inserted into the mating part 111 so that the buffer 3 is more stably installed in the mating part 111.

[0049] like Figure 3 As shown, the first abutting part 121 includes a first abutting section 1211 and a second abutting section 1212 located on both sides of the first abutting section 1211. The first abutting section 1211 and the second abutting part 1211 abut against the buffer member 3 respectively, and the two second abutting sections 1212 abut against the buffer member 3 respectively.

[0050] In this embodiment, the first abutting segment 1211 can cooperate with the second abutting part 131 to abut against the buffer member 3 respectively, so that the first abutting segment 1211 and the second abutting part 131 respectively limit the buffer member 3 in the vertical direction; the two second abutting segments 1212 can cooperate with each other to abut against the buffer member 3 respectively, thereby limiting the buffer member 3 in the horizontal direction, thereby improving the stability of the connection between the buffer member 3 and the mating part 111.

[0051] like Figure 3 As shown, the second abutting part 131 includes a connecting section 1311 and a plurality of third abutting sections 1312. The plurality of third abutting sections 1312 are spaced apart from the connecting section 1311. The first abutting section 1211 and the plurality of third abutting sections 1312 abut against the buffer member 3 respectively.

[0052] In this embodiment, one end of the connecting segment 1311 can be connected to the bottom wall of the second housing 13, and the other end of the connecting segment 1311 can be connected to a plurality of third abutment segments 1312. The plurality of third abutment segments 1312 are spaced apart from the connecting segment 1311, thereby enabling the connecting segment 1311 and the plurality of third abutment segments 1312 to support the buffer 3 more stably, thereby further improving the stability of the connection between the buffer 3 and the mating part 111.

[0053] In this embodiment, the bottom wall of the second outer shell 13 may be provided with a reinforcing rib, one end of which is connected to the outer side wall of the third abutment section 1312, and the other end of which is connected to the bottom wall of the second outer shell 13.

[0054] like Figure 1 , Figure 5 and Figure 6 As shown, the main body of the water flosser also includes a fastener 4. The first housing 12 is provided with a connecting post 122, and the second housing 13 has a mounting hole 132 adapted to the connecting post 122. The fastener 4 passes through the mounting hole 132 and is locked to the connecting post 122.

[0055] In this embodiment, the fastener 4 can be a bolt, screw, or other fastener 4. To improve the stability of the connection between the first housing 12 and the second housing 13, this application provides that the fastener 4 passes through the mounting hole 132 and is locked to the connecting post 122, so that the first housing 12 can be detachably connected and fixed to the second housing 13.

[0056] like Figure 1 and Figure 2 As shown, the outer wall of the first outer shell 12 near the second outer shell 13 has a connecting groove 123, and the outer wall of the second outer shell 13 near the first outer shell 12 has a third connecting part 133. The third connecting part 133 is inserted into the connecting groove 123 so that the first outer shell 12 and the second outer shell 13 are connected and fixed.

[0057] In this embodiment, in order to further improve the sealing performance of the first outer shell 12 and the second outer shell 13, the outer wall of the second outer shell 13 near the first outer shell 12 is provided with a third connecting part 133, and the outer wall of the first outer shell 12 near the second outer shell 13 is provided with a connecting groove 123. The third connecting part 133 is inserted into the connecting groove 123 so that the first outer shell 12 and the second outer shell 13 are sealed together.

[0058] This utility model also proposes a water flosser, which includes a water tank, a nozzle assembly, and a water flosser main unit. The specific structure of the 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.

[0059] In this embodiment, the water tank is connected to the water pump assembly 2, and the water pump assembly 2 is connected to the nozzle assembly through the water outlet pipe, thereby making it easier for water to be drawn from the water tank into the nozzle assembly.

[0060] 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 waterpik main machine applied to a waterpik, characterized in that, The oral irrigator main machine comprises: a shell having a containing cavity, an inner side wall of the containing cavity being provided with a matching part; a pump water assembly arranged in the containing cavity, an outer peripheral side of the pump water assembly being provided with a connecting part; a buffer, the connecting part being connected and fixed with the matching part through the buffer, the buffer being arranged between the connecting part and the matching part, a bottom end of the pump water assembly being spaced apart from a bottom wall of the shell and forming a vacant space, the bottom end of the pump water assembly being in a suspended state in the containing cavity.

2. The oral irrigator main unit of claim 1, wherein, The pump water assembly comprises a first shell and a second shell connected with each other, two ends of the first shell having first connecting ends, two ends of the second shell having second connecting ends, the connecting part comprising a first connecting part and a second connecting part, the first connecting part being arranged at the first connecting end, the second connecting part being arranged at the second connecting end, the first connecting part and the second connecting part being connected with the buffer respectively.

3. The oral irrigator main unit of claim 2, wherein, One of the first connecting part and the buffer is provided with a first clamping block, and the other is provided with a first clamping groove corresponding to the first clamping block, the first clamping block being clamped in the first clamping groove, so that the first connecting part and the buffer are clamped and fixed; and / or, one of the second connecting part and the buffer is provided with a second clamping block, and the other is provided with a second clamping groove corresponding to the second clamping block, the second clamping block being clamped in the second clamping groove, so that the second connecting part and the buffer are clamped and fixed.

4. The oral irrigator main unit of claim 2, wherein, The buffer has a groove with one end open, both sides of the buffer are provided with limiting parts, the limiting parts are arranged at the opening, the first connecting part and the second connecting part are connected in the groove, and the limiting parts are used to limit the first connecting part and the second connecting part from falling off from the opening.

5. The oral irrigator main unit of claim 3, wherein, The shell comprises a first shell and a second shell, the first shell and the second shell enclosing the containing cavity, an inner side wall of the first shell being provided with a first abutting part, an inner side wall of the second shell being provided with a second abutting part, the first abutting part and the second abutting part being oppositely arranged along a first direction, the first abutting part and the second abutting part enclosing the matching part, the first abutting part and the second abutting part abutting the buffer respectively, so that the buffer is connected and fixed with the matching part.

6. The oral irrigator main unit of claim 5, wherein, The first abutting part comprises a first abutting segment and second abutting segments located on both sides of the first abutting segment, the first abutting segment and the second abutting segments abutting the buffer respectively, and two second abutting segments abutting the buffer respectively.

7. The oral irrigator main unit of claim 6, wherein, The second abutting part comprises a connecting segment and a plurality of third abutting segments, the plurality of third abutting segments being spaced apart on the connecting segment, the first abutting segment and the plurality of third abutting segments abutting the buffer respectively.

8. The oral irrigator main unit of claim 5, wherein, The oral irrigator main machine further comprises a fastener, the first shell being provided with a connecting column, the second shell having a mounting hole matched with the connecting column, and the fastener being locked to the connecting column through the mounting hole.

9. The oral irrigator main unit of claim 5, wherein, The first shell is provided with a connecting groove on the outer wall near the side of the second shell, and the second shell is provided with a third connecting part on the outer wall near the side of the first shell, the third connecting part is inserted into the connecting groove, so that the first shell and the second shell are connected and fixed.

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

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