CN219570316U - Tooth-flushing device liquid outlet system and tooth-flushing device - Google Patents

Abstract

The utility model provides a liquid outlet system of a tooth washing device and the tooth washing device, comprising: the liquid pump device comprises a liquid pump cavity, a piston arranged in the liquid pump cavity in a sliding manner and a piston rod which penetrates through the liquid pump cavity in a liquid-tight manner and is connected with the piston, and the piston divides the pump cavity of the liquid pump cavity into a rod cavity and a rodless cavity; the liquid inlet channel is communicated with the rod cavity and is provided with a liquid inlet one-way valve positioned at the outer side of the liquid pump cavity; the liquid outlet channel is communicated with the rodless cavity; the drainage flow passage is respectively communicated with the rod cavity and the rodless cavity, and is provided with a liquid outlet one-way valve positioned at the outer side of the liquid pump cavity so as to drain liquid in the rod cavity into the rodless cavity when the piston performs a suction stroke. The utility model can lead the structure arrangement of the liquid outlet check valve to be more flexible, and further lead the liquid outlet check valve and the liquid inlet check valve to be arranged on the same side, thereby more flexibly arranging, overhauling and replacing the two check valve structures.

Description

Tooth-flushing device liquid outlet system and tooth-flushing device

Technical Field

The utility model relates to the technical field of oral cavity cleaning, in particular to a liquid outlet system of a tooth washing device and the tooth washing device.

Background

With the improvement of living standard, people's consciousness of oral care is gradually improved, and the oral cavity cleaning tools on the market are more and more diversified, wherein the tooth flusher is one of the requisite small household appliances in families as a substitute of traditional dental floss. The basic working principle is that the pump body is utilized to pump water from the water tank, high-pressure pulse water flow with hundreds or thousands of times per minute is sprayed out through the nozzle to clean food residues, dental plaque, massage gingiva and the like in tooth gaps, and the oral cavity environment is improved.

The existing tooth-cleaning device has the problems that the liquid outlet one-way valve of the water pump assembly is arranged in the liquid pump cavity, so that the maintenance and the replacement of the damaged liquid outlet one-way valve are troublesome.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model is to provide a liquid outlet system of a dental caries device and a dental caries device, which can make the structural arrangement of a liquid outlet check valve more flexible, and further make the liquid outlet check valve and a liquid inlet check valve arranged on the same side, so as to more flexibly arrange and overhaul to replace two check valve structures, and is more suitable for a bench dental caries device with low space requirements.

In order to solve the above technical problems, the present utility model provides a liquid outlet system of a dental irrigator, comprising:

the liquid pump device comprises a liquid pump cavity, a piston arranged in the liquid pump cavity in a sliding manner and a piston rod which penetrates through the liquid pump cavity in a liquid-tight manner and is connected with the piston, and the piston divides the pump cavity of the liquid pump cavity into a rod cavity and a rodless cavity;

the liquid inlet channel is communicated with the rod cavity and is provided with a liquid inlet one-way valve positioned at the outer side of the liquid pump cavity;

the liquid outlet channel is communicated with the rodless cavity;

the drainage flow passage is respectively communicated with the rod cavity and the rodless cavity, and is provided with a liquid outlet one-way valve positioned at the outer side of the liquid pump cavity so as to drain liquid in the rod cavity into the rodless cavity when the piston performs a suction stroke.

Preferably, the liquid inlet end of the guiding and adjusting channel is indirectly communicated with the rod cavity through a liquid inlet channel at the downstream of the liquid inlet one-way valve, and the liquid outlet end of the guiding and adjusting channel is directly communicated with the rod-free cavity.

Preferably, the liquid inlet channel comprises a vertical liquid inlet section and a horizontal liquid inlet section which are communicated with each other, the guiding and adjusting channel comprises a vertical guiding and adjusting section and a horizontal guiding and adjusting section which are communicated with each other, and the vertical guiding and adjusting section and the vertical liquid inlet section are coaxially communicated.

Preferably, the liquid inlet one-way valve is arranged in the vertical liquid inlet section, and the liquid outlet one-way valve is arranged in the vertical guiding and adjusting section.

Preferably, a transition communication piece is clamped between the liquid inlet one-way valve and the liquid outlet one-way valve, the transition communication piece is provided with a first overflow hole and a second overflow hole, the first overflow hole is used for communicating the liquid inlet one-way valve and the transverse liquid inlet section, and the second overflow hole is used for communicating the liquid inlet one-way valve and the liquid outlet one-way valve.

Preferably, the transition piece is provided with a bulge abutting against the liquid inlet one-way valve so as to enable a liquid buffer space to be formed between the transition piece and the liquid inlet one-way valve.

Preferably, the liquid pump device further comprises a pump shell internally provided with the liquid pump cavity, and the liquid inlet flow channel and the guiding flow channel are both formed in the pump shell.

Preferably, the pump case includes a pump case body and a boss portion laterally protruding from the pump case body; the vertical liquid inlet section of the liquid inlet flow channel and the vertical guiding section of the guiding flow channel are both formed on the boss part, the vertical liquid inlet section and the vertical guiding section are coaxially communicated, and the vertical liquid inlet section is downwards communicated with the boss part.

Preferably, the tooth-flushing device liquid outlet system further comprises a liquid-tight structure, wherein the liquid-tight structure comprises a first sealing ring and a second sealing ring, the first sealing ring is embedded in the liquid pump cavity and is in liquid-tight sliding fit with the piston, and the second sealing ring is embedded in the liquid pump cavity and is in liquid-tight sliding fit with the piston rod.

The utility model also provides a tooth-flushing device, which comprises the tooth-flushing device liquid outlet system.

As described above, the liquid outlet system of the tooth cleaner and the tooth cleaner have the following beneficial effects: the piston rod of the liquid pump device reciprocates up and down under the drive of external force. When the piston is pulled back by the piston rod to make a suction stroke, the internal pressure of the rod cavity is increased, the internal pressure of the rodless cavity is reduced, the liquid inlet one-way valve is switched to a closed state, the liquid outlet one-way valve is switched to an open state, and liquid in the rod cavity can overcome the closing pretightening force of the liquid outlet one-way valve and flow into the rodless cavity through the guide flow channel. When the piston is pushed out by the piston rod to perform a liquid discharge stroke, the internal pressure of the rod cavity is reduced, the internal pressure of the rodless cavity is increased, the liquid inlet one-way valve is switched to an open state, and liquid in the liquid inlet flow passage can overcome the closing pretightening force of the liquid inlet one-way valve to flow into the rod cavity; meanwhile, the liquid outlet one-way valve is switched to a closed state, and liquid in the rodless cavity is extruded into the liquid outlet flow passage by the piston. The main innovation point of the liquid outlet system of the tooth-washing device is that: the liquid outlet one-way valve is arranged. The liquid outlet one-way valve is not arranged at the communication part of the liquid outlet flow passage and the rodless cavity, but is arranged on the guiding flow passage, namely the liquid outlet one-way valve is positioned at the outer side of the liquid pump cavity, so that the liquid outlet one-way valve can be flexibly arranged, and the liquid outlet one-way valve is convenient to overhaul and replace. Therefore, the liquid outlet system of the tooth-flushing device is not compact in structure, but the structure arrangement of the liquid outlet one-way valve is more flexible, so that the liquid outlet one-way valve and the liquid inlet one-way valve are arranged on the same side, the two one-way valve structures are more flexibly arranged and overhauled to replace, and the tooth-flushing device is more suitable for desk-type tooth-flushing devices with low space requirements.

Drawings

FIG. 1 is a perspective view of a tapping system of a dental appliance according to the present utility model;

fig. 2 shows a side view of the tapping system of the dental irrigator of the present utility model;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 and illustrating the piston in a discharge stroke;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2 and illustrating the piston in a suction stroke;

FIG. 5 is a first perspective view of a liquid inlet check valve, a liquid outlet check valve, and a transition piece;

fig. 6 shows a second perspective view of the inlet check valve, the outlet check valve, and the transition piece.

Description of element reference numerals

1. Liquid pump device

11. Liquid pump cavity

12. Piston

13. Piston rod

14. With rod cavities

15. Rodless cavity

16. Pump case

161. Pump case body

162. Boss portion

17. Transmission mechanism

18. Driving mechanism

2. Liquid outlet one-way valve

3. Liquid inlet channel

31. Vertical liquid inlet section

32. Transverse liquid inlet section

4. Liquid inlet one-way valve

5. Liquid outlet channel

6. Guiding and regulating runner

61. Vertical guiding and adjusting section

62. Transverse guiding and adjusting section

7. Liquid-tight structure

71. First sealing ring

72. Second sealing ring

8. Transition communicating piece

81. First overflow hole

82. Second flow-through hole

83. Protrusions

9. Nozzle

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the utility model, which is defined by the appended claims, but rather by the claims, unless otherwise indicated, and unless otherwise indicated, all changes in structure, proportions, or otherwise, used by those skilled in the art, are included in the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

In fig. 3 and 4, white non-solid arrows indicate the direction of movement of the piston 12, and black solid arrows indicate the direction of flow of the liquid.

As shown in fig. 1, 2, 3 and 4, the present utility model provides a liquid outlet system of a dental appliance, comprising:

the liquid pump device 1, the liquid pump device 1 comprises a liquid pump cavity 11, a piston 12 arranged in the liquid pump cavity 11 in a sliding manner, and a piston rod 13 which is penetrated in the liquid pump cavity 11 in a liquid-tight manner and is connected with the piston 12, wherein the piston 12 divides the pump cavity of the liquid pump cavity 11 into a rod cavity 14 and a rodless cavity 15;

the liquid inlet channel 3, the liquid inlet channel 3 is communicated with the rod cavity 14, and the liquid inlet channel 3 is provided with a liquid inlet one-way valve 4 positioned at the outer side of the liquid pump cavity 11;

the liquid outlet channel 5, the liquid outlet channel 5 is communicated with the rodless cavity 15;

the drainage channel 6, the drainage channel 6 is respectively connected with the rod cavity 14 and the rodless cavity 15, and the drainage channel 6 is provided with a liquid outlet one-way valve 2 positioned at the outer side of the liquid pump cavity 11 so as to drain the liquid in the rod cavity 14 into the rodless cavity 15 when the piston 12 performs a suction stroke.

In the liquid outlet system of the tooth-washing device, the piston rod 13 of the liquid pump device 1 reciprocates up and down under the drive of external force. Referring to fig. 3, when the piston 12 is pulled back by the piston rod 13 to make a suction stroke, the internal pressure of the rod-shaped chamber 14 increases and the internal pressure of the rodless chamber 15 becomes smaller, the liquid inlet check valve 4 is switched to a closed state, the liquid outlet check valve 2 is switched to an open state, and the liquid in the rod-shaped chamber 14 can overcome the closing preload of the liquid outlet check valve 2 and flow into the rodless chamber 15 through the pilot flow passage 6.

Referring to fig. 4, when the piston 12 is pushed out by the piston rod 13 to perform a liquid discharge stroke, the internal pressure of the rod cavity 14 increases and the internal pressure of the rodless cavity 15 increases, the liquid inlet one-way valve 4 is switched to an open state, and the liquid in the liquid inlet channel 3 can flow into the rod cavity 14 against the closing pre-tightening force of the liquid inlet one-way valve 4; at the same time, the liquid outlet one-way valve 2 is switched to a closed state, and liquid in the rodless cavity 15 is extruded into the liquid outlet flow channel 5 by the piston 12.

The main innovation point of the liquid outlet system of the tooth-washing device is that: the liquid outlet one-way valve 2 is arranged. The liquid outlet one-way valve 2 is not arranged at the communication part of the liquid outlet flow passage 5 and the rodless cavity 15, but is arranged on the guiding flow passage 6, namely the liquid outlet one-way valve 2 is positioned at the outer side of the liquid pump cavity 11, so that the liquid outlet one-way valve 2 can be flexibly arranged, and the liquid outlet one-way valve 2 is convenient to overhaul and replace.

Therefore, compared with the existing liquid outlet system in which the liquid outlet one-way valve is arranged in the liquid pump cavity 11, the liquid outlet system of the tooth-flushing device is not compact in structure, but the structure of the liquid outlet one-way valve 2 is more flexible, so that the liquid outlet one-way valve 2 and the liquid inlet one-way valve 4 are arranged on the same side, the two one-way valve structures are more flexibly arranged and overhauled to replace, and the tooth-flushing device is more suitable for the desk-type tooth-flushing device with low space requirements.

The liquid pump device 1 further comprises a transmission mechanism 17 and a driving mechanism 18, and the piston rod 13 is in transmission connection with the driving mechanism 18 through the transmission mechanism 17. The piston rod 13 reciprocates under the drive of the drive mechanism 18.

The liquid pump device 1 may be a plunger pump; the transmission mechanism 17 and the driving mechanism 18 are all existing mechanisms, the transmission mechanism 17 may be an eccentric wheel assembly, and the driving mechanism 18 may be a motor assembly, which is not described herein.

The liquid inlet check valve 4 or the liquid outlet check valve 2 can be a ball valve (with a return spring) or a valve plate.

As shown in fig. 2 and 3, in order to achieve a throttle function when the piston 12 is pulled back into the suction stroke. The liquid outlet system of the tooth-washing device further comprises a nozzle 9 communicated with the liquid outlet channel 5, the rodless cavity 15 is in a negative pressure state when the piston 12 performs a suction stroke, and the volume change amount increased by the rodless cavity 15 is larger than the volume change amount reduced by the rod cavity 14. When the piston 12 moves downwards, the rodless cavity 15 is in a negative pressure state, so that the rodless cavity 15 can generate suction force on liquid in the nozzle 9, and the liquid in the nozzle 9 flows back to complement the difference value of the volume change quantity between the rodless cavity 15 and the rod cavity 14, thereby realizing the effect of saving the liquid. When the piston 12 completes the suction stroke, the lumen of the nozzle 9 is almost or partially empty. Subsequently, the piston 12 starts the discharge stroke, and a portion of the liquid before the occurrence of the flow peak of the liquid pump apparatus 1 fills the lumen of the nozzle 9, so that a portion of the liquid having a low flow rate is not ejected from the nozzle 9, that is, the liquid is ejected from the nozzle 9 at or near the time when the flow peak occurs. Therefore, the liquid reserved in the nozzle 9 can be fully utilized, the liquid is saved, the duration of oral cleaning is prolonged, the liquid ejection quantity before the flow peak appears can be reduced, the purpose of saving the liquid before the peak is realized, and the pulse feeling and the effective utilization rate of the liquid in oral cleaning of a user are improved. Furthermore, the entire construction of the piston 12 and the piston rod 13 may be a two-stage stepped shaft structure, which not only reduces the supply amount of the intake runner 3 but also improves the suction capability of the liquid pump device 1 for the liquid in the nozzle 9, since the piston rod 13 occupies a part of the space having the rod chamber 14.

As shown in fig. 3, in order to make the above-mentioned diversion channel 6 divert liquid by using a partial structure of the liquid inlet channel 3, the liquid inlet end of the above-mentioned diversion channel 6 is indirectly connected to the rod cavity 14 through the liquid inlet channel 3 at the downstream of the liquid inlet one-way valve 4, and the liquid outlet end of the diversion channel 6 is directly connected to the rod-free cavity 15.

For the convenience of processing and forming the liquid inlet flow channel 3 and the guiding flow channel 6, the liquid inlet flow channel 3 comprises a vertical liquid inlet section 31 and a horizontal liquid inlet section 32 which are mutually communicated, the guiding flow channel 6 comprises a vertical guiding section 61 and a horizontal guiding section 62 which are mutually communicated, and the vertical guiding section 61 and the vertical liquid inlet section 31 are coaxially communicated.

In order to facilitate the disassembly and assembly of the liquid inlet one-way valve 4 and the liquid outlet one-way valve 2, the liquid inlet one-way valve 4 is arranged in the vertical liquid inlet section 31, and the liquid outlet one-way valve 2 is arranged in the vertical guiding section 61.

As shown in fig. 5 and 6, in order to maintain the distance between the liquid inlet check valve 4 and the liquid outlet check valve 2 and realize the functions of liquid suction and liquid discharge, a transition communication piece 8 is sandwiched between the liquid inlet check valve 4 and the liquid outlet check valve 2, the transition communication piece 8 has a first overflow hole 81 and a second overflow hole 82, the first overflow hole 81 is used for communicating the liquid inlet check valve 4 and the lateral liquid inlet section 32, and the second overflow hole 82 is used for communicating the liquid inlet check valve 4 and the liquid outlet check valve 2. Specifically, the first flow-through hole 81 is provided to penetrate in the radial direction of the transition communication member 8, one end of the second flow-through hole 82 penetrates upward to the top of the transition communication member 8 and the other end penetrates downward to the first flow-through hole 81.

In order to improve the flow stability of the liquid, the transition piece 8 has a protrusion 83 abutting against the liquid inlet check valve 4, so that a liquid buffering space is formed between the transition piece 8 and the liquid inlet check valve 4.

In addition, when the liquid inlet check valve 4 and the liquid outlet check valve 2 are both in ball valve structure, the top of the interposed transition communication member 8 forms the valve seat structure of the liquid outlet check valve 2, and the bottom of the interposed transition communication member 8 has the protrusion 83.

As shown in fig. 3 and 4, in order to flexibly arrange the liquid inlet check valve 4 and the liquid outlet check valve 2, the liquid pump device 1 further includes a pump housing 16 having the liquid pump chamber 11 therein, and the liquid inlet flow channel 3 and the liquid introduction flow channel 6 are both formed in the pump housing 16.

In order to further flexibly arrange the liquid inlet check valve 4 and the liquid outlet check valve 2, the pump casing 16 includes a pump casing body 161 and a boss portion 162 laterally protruding from the pump casing body 161; the vertical liquid inlet section 31 of the liquid inlet flow channel 3 and the vertical guiding section 61 of the guiding flow channel 6 are both formed on the boss 162, the vertical liquid inlet section 31 and the vertical guiding section 61 are coaxially communicated, and the vertical liquid inlet section 31 is downwards communicated with the boss 162. Specifically, the boss portion 162 may be integrally formed with the pump housing body 161, or may be a detachable module structure.

In order to improve the liquid tightness between the liquid pump cavity 11 and the piston 12 and the piston rod 13 respectively, the tooth washer liquid outlet system further comprises a liquid-tight structure 7, wherein the liquid-tight structure 7 comprises a first sealing ring 71 and a second sealing ring 72, the first sealing ring 71 is embedded in the liquid pump cavity 11 and is in liquid-tight sliding fit with the piston 12, and the second sealing ring 72 is embedded in the liquid pump cavity 11 and is in liquid-tight sliding fit with the piston rod 13.

Further, the maximum sealing pressure of the first seal ring 71 is greater than the maximum sealing pressure of the second seal ring 72. The first seal ring 71 is subjected to high pressure, but a small amount of leakage does not affect the operation, so that the sealing performance requirement of the seal ring subjected to high pressure is reduced; the second seal 72 does not allow leakage, but due to its low operating pressure, the operating conditions are improved and the service life is greatly extended. The tooth flusher in the prior art only has a sealing ring such as a high-pressure sealing ring, and the high-pressure sealing ring not only requires high sealing pressure but also does not allow leakage, so that compared with the prior art, the technical scheme of the embodiment has the advantages that the performance requirement on the sealing ring is reduced, and the service life of the sealing ring is effectively prolonged.

The utility model also provides a tooth-flushing device, which comprises the tooth-flushing device liquid outlet system. Further, the tooth-rinsing device is a desk-type tooth-rinsing device with larger volume. The desk type tooth washer can be flexibly matched with the liquid outlet one-way valve 2 of the desk type tooth washer, so that the use experience of a user is improved.

In summary, the liquid outlet system of the tooth-washing device and the tooth-washing device can enable the structural arrangement of the liquid outlet one-way valve to be more flexible, and further enable the liquid outlet one-way valve and the liquid inlet one-way valve to be arranged on the same side, so that the two one-way valve structures are more flexibly arranged, overhauled and replaced, and the tooth-washing device is more suitable for the desk-type tooth-washing device with low space requirements. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. A dental appliance tapping system, comprising:

the liquid pump device (1), the liquid pump device (1) comprises a liquid pump cavity (11), a piston (12) arranged in the liquid pump cavity (11) in a sliding manner, and a piston rod (13) which is arranged in the liquid pump cavity (11) in a penetrating manner in a liquid-tight manner and is connected with the piston (12), wherein the piston (12) divides the pump cavity of the liquid pump cavity (11) into a rod cavity (14) and a rodless cavity (15);

the liquid inlet flow passage (3), the liquid inlet flow passage (3) is communicated with the rod cavity (14), and the liquid inlet flow passage (3) is provided with a liquid inlet one-way valve (4) positioned at the outer side of the liquid pump cavity (11);

the liquid outlet channel (5), the liquid outlet channel (5) is communicated with the rodless cavity (15);

the drainage flow channel (6), the drainage flow channel (6) is respectively communicated with the rod cavity (14) and the rodless cavity (15), and the drainage flow channel (6) is provided with a liquid outlet one-way valve (2) positioned at the outer side of the liquid pump cavity (11) so as to drain liquid in the rod cavity (14) into the rodless cavity (15) when the piston (12) is in a suction stroke.

2. The rinse outlet system of claim 1, wherein: the liquid inlet end of the guiding and adjusting flow channel (6) is indirectly communicated with the rod cavity (14) through the liquid inlet flow channel (3) at the downstream of the liquid inlet one-way valve (4), and the liquid outlet end of the guiding and adjusting flow channel (6) is directly communicated with the rodless cavity (15).

3. The rinse outlet system of claim 2, wherein: the liquid inlet flow channel (3) comprises a vertical liquid inlet section (31) and a horizontal liquid inlet section (32) which are communicated with each other, and the guiding flow channel (6) comprises a vertical guiding section (61) and a horizontal guiding section (62) which are communicated with each other, wherein the vertical guiding section (61) and the vertical liquid inlet section (31) are coaxially communicated.

4. A dental irrigator tapping system according to claim 3, wherein: the liquid inlet one-way valve (4) is arranged in the vertical liquid inlet section (31), and the liquid outlet one-way valve (2) is arranged in the vertical guiding and adjusting section (61).

5. The rinse outlet system of claim 4, wherein: the liquid inlet one-way valve (4) and the liquid outlet one-way valve (2) are clamped with a transition communicating piece (8), the transition communicating piece (8) is provided with a first overflow hole (81) and a second overflow hole (82), the first overflow hole (81) is used for communicating the liquid inlet one-way valve (4) and the transverse liquid inlet section (32), and the second overflow hole (82) is used for communicating the liquid inlet one-way valve (4) and the liquid outlet one-way valve (2).

6. The rinse outlet system of claim 5, wherein: the transition communication piece (8) is provided with a bulge (83) which is abutted against the liquid inlet one-way valve (4) so as to enable a liquid buffer space to be formed between the transition communication piece (8) and the liquid inlet one-way valve (4).

7. The rinse outlet system of claim 1, wherein: the liquid pump device (1) further comprises a pump shell (16) internally provided with the liquid pump cavity (11), and the liquid inlet flow channel (3) and the guiding flow channel (6) are both formed in the pump shell (16).

8. The rinse outlet system of claim 7, wherein: the pump shell (16) comprises a pump shell body (161) and a boss part (162) protruding from the pump shell body (161) laterally; the vertical liquid inlet section (31) of the liquid inlet flow channel (3) and the vertical guiding section (61) of the guiding flow channel (6) are both formed on the boss part (162), the vertical liquid inlet section (31) and the vertical guiding section (61) are coaxially communicated, and the vertical liquid inlet section (31) is downwards communicated with the boss part (162).

9. The rinse outlet system of claim 1, wherein: the liquid outlet system of the tooth flushing device further comprises a liquid-tight structure (7), the liquid-tight structure (7) comprises a first sealing ring (71) and a second sealing ring (72), the first sealing ring (71) is embedded in the liquid pump cavity (11) and is in liquid-tight sliding fit with the piston (12), and the second sealing ring (72) is embedded in the liquid pump cavity (11) and is in liquid-tight sliding fit with the piston rod (13).

10. A dental irrigator comprising a dental irrigator tapping system according to any one of claims 1 to 9.