CN216767733U

CN216767733U - Piston water pump for tooth flushing device and tooth flushing device thereof

Info

Publication number: CN216767733U
Application number: CN202123173974.4U
Authority: CN
Inventors: 林韶孟
Original assignee: Dongguan Tianze Household Appliances Co ltd
Current assignee: Dongguan Tianze Household Appliances Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-06-17
Anticipated expiration: 2031-12-15

Abstract

The utility model provides a piston water pump for a tooth flushing device and the tooth flushing device thereof, relating to the technical field of tooth cleaning equipment, wherein the water pump comprises a pump cylinder, a piston assembly arranged in the pump cylinder and a driving assembly in driving connection with the piston assembly, the piston assembly is arranged in the pump cylinder in a pumping way, the piston assembly comprises a plug body, a sealing assembly is arranged on the plug body, and the sealing assembly is simultaneously positioned at the free end and the connecting end of the plug body; the lateral wall of the plug body is provided with a water collecting tank used for collecting water flow when the sealing assembly is aged or worn out, the water collecting tank is positioned between the free end and the connecting end, and the water flow in the water collecting tank naturally flows out through the drain pipe. According to the utility model, the sealing components are simultaneously arranged at the free end and the connecting end of the plug body, so that the gap between the inner wall of the pump cylinder and the plug body is reduced, the sealing effect is increased, and the condition that the waterproof ring is invalid due to the fact that the water inlet speed is higher than the water drainage speed can be avoided due to the arrangement of the water collecting tank.

Description

Piston water pump for tooth flushing device and tooth flushing device thereof

Technical Field

The utility model relates to the technical field of tooth cleaning equipment, in particular to a piston water pump for a tooth flushing device and the tooth flushing device.

Background

Along with the improvement of living standard, the consciousness of people on oral care is gradually improved, and oral cleaning tools on the market are more and more diversified, wherein the tooth flushing device serving as a substitute of the traditional dental floss becomes one of the necessary small household appliances in the family. The basic working principle is that a pump body is used for pumping water from a water tank, and high-pressure pulse water flow which is sprayed for hundreds of times to thousands of times per minute is sprayed through a nozzle to clean food residues and dental plaque in gaps between teeth, massage gums and the like, so that the oral environment is improved.

In the existing pulse type tooth flushing device, pulse and water pressure are key mechanisms for playing a cleaning role. In order to achieve the cleaning effect, the water flow strength of the tooth flushing device needs to be ensured, so that a water pump of the tooth flushing device is very important. However, after the water pump in the existing tooth flushing device is used for a long time, the sealing ring on the piston of the water pump is aged and worn, so that the clean water entering the water pump flows to the circuit part of the tooth flushing device from the gap between the piston and the side wall of the inner cavity, and the tooth flushing device cannot be used or is damaged.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a piston water pump for a tooth rinsing device, so as to solve the technical problem that after a water pump in the tooth rinsing device in the prior art is used for a long time, a sealing ring on a piston is aged or worn, so that clean water entering the water pump flows to a circuit part of the tooth rinsing device from a gap between the piston and a side wall of an inner cavity, and the tooth rinsing device cannot be used or is damaged.

The other object of the present invention is to provide a dental irrigator comprising the piston pump for a dental irrigator.

In order to achieve one of the purposes, the utility model provides a piston water pump for a tooth flushing device, which comprises a pump cylinder, a piston assembly and a driving assembly, wherein the piston assembly is arranged in the pump cylinder, the driving assembly is in driving connection with the piston assembly, the piston assembly is arranged in the pump cylinder in a suction mode, the piston assembly comprises a plug body, a sealing assembly is arranged on the plug body, and the sealing assembly is simultaneously positioned at the free end and the connecting end of the plug body.

According to a preferred embodiment, the sealing assembly comprises a sealing ring which is nested on a side wall of the connecting end of the plug body.

According to a preferred embodiment, the sealing assembly further comprises a sealing head and a sealing ring, the sealing head and/or the sealing ring being mounted to the free end of the plug body.

According to a preferred embodiment, the sealing head is snapped onto the free end of the plug body.

According to a preferred embodiment, the sealing ring is nested on a side wall of the free end of the plug body.

According to a preferred embodiment, the sealing head is clamped at the free end of the plug body, and the sealing ring is nested at the free end of the plug body or on the sealing head.

According to a preferred embodiment, a water containing cavity is arranged in the pump barrel, and the plug body slides back and forth to change the volume of the water containing cavity.

According to a preferred embodiment, the water containing cavity is provided with a water inlet and a water spraying opening, the water spraying opening is opposite to the plug body, and the water inlet is located on the side wall of the water containing cavity.

According to a preferred embodiment, the spout is provided with a duckbill valve or valve flap.

In order to achieve the second purpose, the utility model provides a tooth flushing device, which comprises any one of the piston water pumps for the tooth flushing device and a shell, wherein the piston water pump for the tooth flushing device is arranged in the shell.

The piston water pump for the tooth flushing device provided by the utility model has the following technical effects:

(1) the piston water pump for the tooth flusher mainly comprises a pump cylinder, a piston assembly and a driving assembly, wherein the driving assembly drives the piston assembly to move, the piston assembly is arranged in the pump cylinder in a suction mode and comprises a plug body, and a sealing assembly is arranged on the plug body.

(2) The water catch bowl that sets up on the lateral wall of cock body is located between sealing washer and the sealed head, and when sealed head became invalid because of ageing or wearing and tearing, the rivers that get into the pump barrel inner chamber then can flow to the water catch bowl along the clearance between the lateral wall of cock body and pump barrel in to outwards discharge by the outlet, the setting up of this water catch bowl can avoid leading to the condition emergence of waterproof circle inefficacy because of the velocity of intaking is greater than drainage velocity.

The tooth flushing device provided by the utility model has the following technical effects:

the tooth flusher comprises the piston water pump for the tooth flusher and a shell, wherein the piston water pump for the tooth flusher is arranged in the shell.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a piston water pump for a dental irrigator according to an embodiment of the present invention

FIG. 2 is a sectional view of the piston pump for a dental irrigator of FIG. 1 taken along the direction A-A;

FIG. 3 is a schematic view of the installation of the plug and the sealing head in the piston water pump for the dental irrigator of FIG. 2;

FIG. 4 is a schematic view of the installation of the plug and the sealing ring in the piston water pump for the tooth flusher in FIG. 2;

FIG. 5 is a schematic view of the installation of the plug body together with the sealing head and the sealing ring in the piston water pump for the dental irrigator of FIG. 2;

FIG. 6 is a sectional view of the piston water pump for a dental irrigator of FIG. 1 showing water sprayed from the nozzle portion using a duckbill valve;

figure 7 is a schematic diagram of the duckbill valve of figure 6;

FIG. 8 is a cross-sectional view of the water pump for a water toothpick in FIG. 1, wherein the water pump is provided with a valve plate and a spring for spraying water;

FIG. 9 is a schematic structural view of the valve plate of FIG. 8;

fig. 10 is a schematic view of a water pump including the piston for the water pump of fig. 1.

Wherein, fig. 1-10:

1. a pump barrel; 11. a water inlet; 111. a water inlet nozzle; 12. a water jet; 121. a duckbill valve; 122. a valve plate; 123. a spring; 13. a water outlet; 131. a water discharge nozzle; 14. a water containing cavity;

2. a piston assembly; 21. a plug body; 211. a free end; 212. a connecting end; 213. a water collection tank; 22. a connecting rod; 23. positioning pins; 24. a sliding sleeve;

3. a drive assembly; 31. a motor; 32. an eccentric wheel;

4. a nozzle; 41. a fixing member;

5. a housing;

61. a seal ring; 62. and (6) sealing the head.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

As mentioned in the background, the prior art pulse-type dental irrigators, pulse and water pressure, are the key mechanisms for their cleaning action. In order to achieve the cleaning effect, the water flow strength of the tooth flushing device needs to be ensured, so that a water pump of the tooth flushing device is very important. However, after the water pump in the existing tooth flushing device is used for a long time, the sealing ring on the piston of the water pump is aged and worn, so that the clean water entering the water pump flows to the circuit part of the tooth flushing device from the gap between the piston and the side wall of the inner cavity, and the tooth flushing device cannot be used or is damaged.

Based on the above, the utility model provides a piston water pump for a tooth flushing device, compared with the traditional tooth flushing device, the sealing components of the piston water pump are simultaneously positioned at the free end and the connecting end of the plug body, the sealing components are simultaneously installed at the free end and the connecting end of the plug body, so that the gap between the inner wall of the pump cylinder and the plug body is reduced, the sealing effect is increased, when one of the sealing components at the free end or the connecting end is aged or worn, water flow does not flow to the circuit part of the tooth flushing device from the gap between the plug body and the side wall of the pump cylinder, and the probability that the tooth flushing device cannot be used or is damaged is reduced to a certain extent.

The technical means of the present invention will be described in detail with reference to the accompanying drawings 1 to 10.

Example 1:

as shown in fig. 10, the water pump for a dental irrigator is located in the housing 5, and as shown in fig. 1 and 2, the water pump for a dental irrigator of the present embodiment includes a pump cylinder 1, a piston assembly 2, and a drive assembly 3.

The pump barrel 1 is a hollow cavity with two open ends, a water containing cavity 14 is arranged in the pump barrel 1, the piston assembly 2 slides back and forth to change the volume of the water containing cavity 14, in addition, a water inlet 11, a water spraying port 12 and a water discharging port 13 are arranged on the pump barrel 1, the water inlet 11, the water spraying port 12 and the water discharging port 13 are all communicated with the hollow cavity of the pump barrel 1, the water spraying port 12 is positioned at the end port of the pump barrel 1, the water inlet 11 and the water discharging port 13 are positioned on the side wall of the pump barrel 1, namely the water inlet 11 and the water spraying port 12 are positioned on the water containing cavity 14, the water spraying port 12 is opposite to the plug body 21, and the water inlet 11 is positioned on the side wall of the water containing cavity 14.

The piston assembly 2 comprises a plug body 21, a connecting rod 22 and a positioning pin 23, wherein the fixed end of the connecting rod 22 is hinged to the connecting end 212 of the plug body 21 through the positioning pin 23, and the opposite end of the connecting rod 22 is in transmission connection with the driving assembly 3; in the process of using the water pump, the driving component 3 drives the plug body 21 to realize reciprocating motion in the pump barrel 1 through the connecting rod 22, so that the water pump can finish the effects of pumping water and spraying water.

In order to enhance the sealing effect between the inner wall of the pump barrel 1 and the plug body 21 and prevent the water flow in the pump barrel 1 from flowing to the circuit part of the water pump, a sealing assembly is arranged on the plug body 21 and is simultaneously positioned at the free end 211 and the connecting end 212 of the plug body 21, the sealing assembly comprises a sealing ring 61 and a sealing head 62, the sealing ring 61 of the embodiment is positioned at the connecting end 212 of the plug body 21, and the sealing head 62 is positioned at the free end 211 of the plug body 21, as shown in fig. 3, the sealing ring 61 is nested on the side wall of the connecting end 212 of the plug body 21, the sealing head 62 is buckled at the free end 211 of the plug body 21, and the sealing effect between the plug body 21 and the inner wall of the pump barrel 1 can be further improved by the arrangement of the sealing ring 61 and the sealing head 62, so that the use of the water pump is more convenient.

As shown in fig. 1, the driving assembly 3 comprises a motor 31 and an eccentric wheel 32, wherein the power output end of the motor 31 is in transmission connection with the eccentric wheel 32, and the opposite end of the connecting rod 22 is arranged at the eccentric part of the eccentric wheel 32; when the motor 31 is started, the motor 31 drives the eccentric wheel 32 to rotate, and the eccentric wheel 32 can drive the connecting rod 22 to move during rotation, so that the piston can realize reciprocating motion in the pump body. Preferably, the driving device includes a storage battery and a circuit board, the storage battery is electrically connected to the motor 31 through the circuit board, and supplies the motor 31 with electric energy required by its operation.

When the washing device is used, a user only needs to start the motor 31, the motor 31 drives the plug body 21 to reciprocate in the pump barrel 1 through the eccentric wheel 32, so that the volume of the water containing cavity 14 is changed periodically, and the pump barrel 1 alternately sucks and ejects water flow (pulse water flow) to wash teeth and tooth gaps.

When the sealing head 62 on the plug body 21 is aged or worn, the water flow entering the pump barrel 1 flows downwards through the gap between the plug body 21 and the side wall of the pump barrel 1, at this time, the sealing ring 61 on the plug body 21 can effectively block the water flow flowing to the circuit part, and at the same time, the water flow can be discharged outwards through the water outlet 13, so as to avoid the situation that the circuit part of the tooth flushing device is damaged.

In order to facilitate the outward drainage from the drainage outlet 13, the side wall of the plug body 21 is provided with a water collection tank 213, the water collection tank 213 is located between the sealing ring 61 and the sealing head 62, when the sealing head 62 fails due to aging or abrasion, the water flow entering the inner cavity of the pump barrel 1 flows into the water collection tank 213 along the gap between the plug body 21 and the side wall of the pump barrel 1 and is discharged outward from the drainage outlet 13, and the water collection tank 213 is arranged to avoid the occurrence of the failure of the waterproof ring due to the fact that the water inlet speed is greater than the drainage speed.

As shown in fig. 2, a sliding sleeve 24 is disposed on a side wall of an inner cavity of the pump barrel 1, the sliding sleeve 24 is a circular tubular structure, the plug body 21 is slidably disposed in the sliding sleeve 24, so that the plug body 21 and the sliding sleeve 24 are in clearance fit, and the sealing head 62 on the plug body 21 and the sliding sleeve 24 are in interference fit, and the sliding sleeve 24 can effectively reduce the wear of the sealing head 62, thereby effectively improving the service life of the water pump.

It should be noted that the sliding sleeve 24 is made of stainless steel, which can reduce the friction coefficient between the sliding sleeve 24 and the sealing head 62, thereby further reducing the wear of the sealing head 62.

As shown in fig. 1, 2 and 10, the water pump further includes a water inlet nozzle 111 and a water outlet nozzle 131, wherein the water inlet nozzle 111 is inserted into the water inlet 11, and the water outlet nozzle 131 is inserted into the water outlet 13, so as to facilitate the installation of the water inlet pipe and the water outlet pipe with the pump barrel 1, thereby facilitating the use of the water pump.

Preferably, the sealing ring is sleeved on the inserting end of the water inlet nozzle 111, the sealing ring is also arranged at the inserting end of the water discharging nozzle 131, and the sealing ring on the water inlet nozzle 111 and the sealing ring on the water discharging nozzle 131 can effectively seal the gap between the water inlet nozzle 111 and the water discharging nozzle 131 and the pump barrel 1, so as to avoid the water leakage.

The insertion end of the water inlet 111 refers to the end of the water inlet 111 inserted into the water inlet 11 of the pump barrel 1, and the insertion end of the water discharge nozzle 131 refers to the end of the water discharge nozzle 131 inserted into the water discharge opening 13 of the pump barrel 1.

As shown in fig. 6 to 9, the water pump further includes a fixing member 41, the fixing member 41 is disposed at the water outlet 12, and a spring 123 is disposed between the fixing member 41 and the valve plate 122, and two ends of the spring 123 abut against the fixing member 41 and the valve plate 122, respectively.

As shown in fig. 6 and 7, in use, the user inserts the nozzle 4 at the water outlet 12 of the pump barrel 1 through the fixing member 41, when pumping water, the plug body 21 moves to the end away from the water outlet 12, the volume of the water containing cavity 14 increases, the movable portion of the valve plate 122 is abutted by the spring 123, so that the movable portion tightly covers the water outlet 12, air is prevented from entering the pump barrel 1 through the water outlet 12, and a sufficient amount of water can be pumped into the inner cavity of the pump barrel 1 during the water inlet process; when water is sprayed, the plug body 21 moves towards one end close to the water spraying opening 12, at the moment, the movable part of the water inlet valve plate 122 can block the water inlet 11, and clear water in the inner cavity can be sprayed out from the water spraying opening 12 under the pressure provided by the plug body 21 and under the action of overcoming the elastic force of the water spraying valve plate 122 and the spring 123, so that the effect of washing teeth and tooth gaps can be achieved.

In addition, the cooperation between the valve plate 122 and the spring 123 can be replaced by a duckbill valve 121, as shown in fig. 8 and 9, the action principle is the same as that of the valve plate 122 and the spring 123, and is not described herein.

Example 2:

The piston assembly 2 comprises a plug body 21, a connecting rod 22 and a positioning pin 23, wherein the fixed end of the connecting rod 22 is hinged to the connecting end 212 of the plug body 21 through the positioning pin 23, and the opposite end of the connecting rod 22 is in transmission connection with the driving assembly 3; in the process of using the water pump, the driving component 3 drives the plug body 21 to realize reciprocating motion in the pump cylinder 1 through the connecting rod 22, so that the water pump can finish the effects of pumping water and spraying water.

In order to enhance the sealing effect between the inner wall of the pump barrel 1 and the plug body 21 and prevent the water flow in the pump barrel 1 from flowing to the circuit part of the water pump, a sealing assembly is arranged on the plug body 21 and is located at both the free end 211 and the connecting end 212 of the plug body 21, the sealing assembly comprises a sealing ring 61 and a sealing head 62, the sealing head 62 is clamped at the free end 211 of the plug body 21, the sealing ring 61 is nested on the free end 211 or the sealing head 62 of the plug body 21, the sealing ring 61 of the embodiment is located at the connecting end 212 of the plug body 21, the sealing head 62 and the sealing ring 61 are located at both the free end 211 of the plug body 21, as shown in fig. 4, the sealing ring 61 is nested on the side wall of the connecting end 212 of the plug body 21, the sealing head 62 is nested on the free end 211 of the plug body 21, the sealing ring 61 is nested on the free end 211 or the sealing head 62 of the plug body 21, and the arrangement of the sealing ring 61 and the sealing head 62 can further enhance the sealing effect between the plug body 21 and the inner wall of the pump barrel 1, so that the use of the water pump is more convenient.

As shown in fig. 1 and 2, the driving assembly 3 comprises a motor 31 and an eccentric wheel 32, wherein the power output end of the motor 31 is in transmission connection with the eccentric wheel 32, and the opposite end of the connecting rod 22 is arranged at the eccentric part of the eccentric wheel 32; when the motor 31 is started, the motor 31 drives the eccentric wheel 32 to rotate, and the eccentric wheel 32 can drive the connecting rod 22 to move during rotation, so that the piston can realize reciprocating motion in the pump body. Preferably, the driving device includes a storage battery and a circuit board, the storage battery is electrically connected to the motor 31 through the circuit board, and supplies the motor 31 with electric energy required by its operation.

When the washing device is used, a user only needs to start the motor 31, the motor 31 drives the plug body 21 to reciprocate in the pump barrel 1 through the eccentric wheel 32, so that the volume of the water containing cavity 14 is changed periodically, and the pump barrel 1 alternately sucks and sprays water flow (pulse water flow) to wash teeth and tooth gaps.

When the sealing head 62 and the sealing ring 61 on the free end 211 of the plug body 21 are aged or worn, the water flow entering the pump barrel 1 flows downwards through the gap between the plug body 21 and the side wall of the pump barrel 1, at this time, the sealing ring 61 on the connecting end 212 of the plug body 21 can effectively block the water flow flowing to the circuit part, and at the same time, the water flow can be discharged outwards through the water outlet 13, so as to avoid the situation that the circuit part of the tooth flushing device is damaged.

In order to facilitate the outward drainage from the drainage outlet 13, the side wall of the plug body 21 is provided with a water collection tank 213, the water collection tank 213 is located between the sealing ring 61 of the connecting end 212 and the sealing head 62 of the free end 211, when the sealing head 62 fails due to aging or abrasion, the water flow entering the inner cavity of the pump barrel 1 flows into the water collection tank 213 along the gap between the plug body 21 and the side wall of the pump barrel 1 and is discharged outward from the drainage outlet 13, and the water collection tank 213 is arranged to avoid the occurrence of the failure of the waterproof ring due to the fact that the water inlet speed is greater than the drainage speed.

As shown in fig. 2, the side wall of the inner cavity of the pump barrel 1 is provided with a sliding sleeve 24, the sliding sleeve 24 is a circular tubular structure, the plug body 21 is slidably disposed in the sliding sleeve 24, so that the plug body 21 and the sliding sleeve 24 are in clearance fit, and the sealing head 62 on the free end 211 of the plug body 21 and the sliding sleeve 24 are in interference fit, and the sliding sleeve 24 can effectively reduce the wear of the sealing head 62, thereby effectively improving the service life of the water pump.

As shown in fig. 6 to 9, the water pump further includes a fixing member 41, the fixing member 41 is disposed at the water outlet 12, a spring 123 is disposed between the fixing member 41 and the valve plate 122, and both ends of the spring 123 abut against the fixing member 41 and the valve plate 122, respectively.

Example 3:

In order to enhance the sealing effect between the inner wall of the pump barrel 1 and the plug body 21 and prevent the water flow in the pump barrel 1 from flowing to the circuit part of the water pump, a sealing assembly is arranged on the plug body 21 and is simultaneously positioned at the free end 211 and the connecting end 212 of the plug body 21, the sealing assembly comprises two sealing rings 61, one sealing ring 61 of the embodiment is positioned at the connecting end 212 of the plug body 21, the other sealing ring 61 is sleeved at the free end 211 of the plug body 21, as shown in fig. 5, the sealing rings 61 are nested on the side walls of the connecting end 212 and the free end 211 of the plug body 21, and the arrangement of the two sealing rings 61 can further improve the sealing effect between the plug body 21 and the inner wall of the pump barrel 1, so that the use of the water pump is more convenient.

As shown in fig. 1 and 2, the driving assembly 3 comprises a motor 31 and an eccentric wheel 32, wherein the power output end of the motor 31 is in transmission connection with the eccentric wheel 32, and the opposite end of the connecting rod 22 is arranged at the eccentric part of the eccentric wheel 32; when the motor 31 is started, the motor 31 drives the eccentric wheel 32 to rotate, and the eccentric wheel 32 can drive the connecting rod 22 to act during rotation, so that the piston can realize reciprocating motion in the pump body. Preferably, the driving device includes a storage battery and a circuit board, the storage battery is electrically connected to the motor 31 through the circuit board, and supplies the motor 31 with electric energy required by its operation.

When the sealing ring 61 at the free end 211 of the plug body 21 is aged or worn, the water flow entering the pump barrel 1 flows downwards through the gap between the plug body 21 and the side wall of the pump barrel 1, at this time, the sealing ring 61 at the connecting end 212 of the plug body 21 can effectively block the water flow flowing to the circuit part, and at the same time, the water flow can be discharged outwards through the water outlet 13, so as to avoid the situation that the circuit part of the tooth flushing device is damaged.

In order to facilitate the outward drainage from the drainage port 13, the side wall of the plug body 21 is provided with a water collection tank 213, the water collection tank 213 is located between the two sealing rings 61, when the sealing head 62 fails due to aging or abrasion, the water flow entering the inner cavity of the pump barrel 1 flows into the water collection tank 213 along the gap between the plug body 21 and the side wall of the pump barrel 1 and is discharged outward from the drainage port 13, and the water collection tank 213 is arranged to avoid the occurrence of the failure of the waterproof ring due to the fact that the water inlet speed is greater than the drainage speed.

As shown in fig. 2, the side wall of the inner cavity of the pump barrel 1 is provided with a sliding sleeve 24, the sliding sleeve 24 is a circular tubular structure, the plug body 21 is slidably disposed in the sliding sleeve 24, so that the plug body 21 and the sliding sleeve 24 are in clearance fit, and the sealing ring 61 on the plug body 21 and the sliding sleeve 24 are in interference fit, and the sliding sleeve 24 can effectively reduce the wear of the sealing head 62, thereby effectively improving the service life of the water pump of the water irrigator.

As shown in fig. 6 and 7, in use, the user inserts the nozzle 4 at the water outlet 12 of the pump barrel 1 through the fixing member 41, when pumping water, the plug body 21 moves to the end far away from the water outlet 12, the volume of the water containing cavity 14 increases, the movable portion of the valve plate 122 is abutted by the spring 123, so that the movable portion tightly covers the water outlet 12, air is prevented from entering the pump barrel 1 through the water outlet 12, and a sufficient amount of water can be pumped into the inner cavity of the pump barrel 1 in the water inlet process; when water is sprayed, the plug body 21 moves towards one end close to the water spraying opening 12, at the moment, the movable part of the water inlet valve plate 122 can block the water inlet 11, and clear water in the inner cavity can be sprayed out from the water spraying opening 12 under the pressure provided by the plug body 21 and under the action of overcoming the elastic force of the water spraying valve plate 122 and the spring 123, so that the effect of washing teeth and tooth gaps can be achieved.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A piston water pump for a tooth flushing device comprises a pump cylinder, a piston assembly arranged in the pump cylinder and a driving assembly in driving connection with the piston assembly, and is characterized in that the piston assembly is arranged in the pump cylinder in a suction mode and comprises a plug body, a sealing assembly is arranged on the plug body, and the sealing assembly is simultaneously positioned at the free end and the connecting end of the plug body;

be equipped with on the lateral wall of cock body and be used for when seal assembly is ageing or wear out the water catch bowl of collecting rivers, the water catch bowl is located the free end with between the link, rivers in the water catch bowl are outwards flowed through the drain pipe nature.

2. The piston water pump for a water toothpick according to claim 1 wherein said sealing assembly comprises a sealing ring nested on a side wall of said connection end of said plug body.

3. The piston water pump for a water toothpick according to claim 1 wherein the seal assembly further comprises a seal head and a seal ring, the seal head and/or the seal ring being mounted to a free end of the plug body.

4. The piston water pump for the tooth flusher according to claim 3, wherein the sealing head is arranged at the free end of the plug body in a buckling mode.

5. The piston water pump for a water toothpick according to claim 3 wherein said sealing ring is nested on a side wall of a free end of said plug body.

6. The piston water pump for the tooth flusher according to claim 3, wherein the sealing head is clamped at the free end of the plug body, and the sealing ring is nested at the free end of the plug body or the sealing head.

7. The piston water pump for the tooth flusher according to any one of claims 1-6, wherein a water containing cavity is arranged in the pump cylinder, and the plug body slides back and forth to change the volume of the water containing cavity.

8. The piston pump as claimed in claim 7, wherein the water chamber has a water inlet and a water outlet, the water outlet is opposite to the plug, and the water inlet is located on a side wall of the water chamber.

9. The piston pump for a water toothpick according to claim 8, wherein said water jet is provided with a duckbill valve or valve plate.

10. The tooth flusher is characterized by comprising the piston water pump for the tooth flusher according to any one of claims 1 to 9 and further comprising a shell, wherein the piston water pump for the tooth flusher is arranged in the shell.