CN215019440U

CN215019440U - Tooth flushing device

Info

Publication number: CN215019440U
Application number: CN202121174381.7U
Authority: CN
Inventors: 何胜华
Original assignee: Zhuhai Xingjia Intelligent Technology Co ltd
Current assignee: Zhuhai Xingjia Intelligent Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-12-07
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a tooth flushing device, which comprises a shell, a nozzle, a water pumping component and a one-way valve, wherein the shell comprises an inner shell and an outer shell, the outer shell is sleeved outside the inner shell and is connected with the inner shell in a sliding way, the outer shell and the inner shell are matched to form a liquid storage cavity, and the volume of the liquid storage cavity can be changed along with the sliding of any one of the outer shell and the inner shell; the nozzle is arranged on the shell; the water pumping assembly comprises a water inlet pipeline and a water pump, one end of the water inlet pipeline is communicated with the nozzle, the other end of the water inlet pipeline is communicated with the liquid storage cavity, the water inlet pipeline is matched with the nozzle to form a pulse flow path, and the water pump is connected in series with the pulse flow path and is used for providing power for the liquid flowing from the liquid storage cavity to the nozzle; and the one-way valve is connected in series with the pulse flow path and is communicated in a one-way mode from the liquid storage cavity to the water spraying port of the nozzle. The technical proposal of the utility model improves the practicability of the tooth flushing device.

Description

Tooth flushing device

Technical Field

The utility model relates to a tooth flushing device technical field, in particular to a tooth flushing device.

Background

In daily life, the toothbrush is commonly used for cleaning teeth, the cleaning effect of the mode is limited, food residues or stubborn dental calculus remained in slits between teeth cannot be well treated, and a tool which is a tooth flusher and is used for cleaning the oral cavity by adopting a pulse water flow impact mode is born for facilitating better cleaning of the oral cavity by people.

The common tooth flushing device is divided into a portable type and a table type, and the common portable tooth flushing device on the market is convenient for a user to carry, the capacity of a water storage cavity of the tooth flushing device cannot be large, so that the user cannot use the tooth flushing device to clean the oral cavity for many times, namely, the practicability of the portable tooth flushing device in the prior art is not high.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a tooth flushing device, aiming at solving the technical problem that the practicability of the tooth flushing device in the prior art is not high.

In order to achieve the above object, the utility model provides a tooth flushing device, including casing, nozzle, pump water subassembly and check valve, the casing includes inner shell and shell, the shell cover is located the outside of inner shell, and with the inner shell sliding connection, the shell cooperates with the inner shell and forms the stock solution chamber, and the volume in stock solution chamber can change along with the slip of any one in shell and the inner shell;

the nozzle is arranged on the shell;

the water pumping assembly comprises a water inlet pipeline and a water pump, one end of the water inlet pipeline is communicated with the nozzle, the other end of the water inlet pipeline is communicated with the liquid storage cavity, the water inlet pipeline is matched with the nozzle to form a pulse flow path, and the water pump is connected in series with the pulse flow path and is used for providing power for the liquid flowing from the liquid storage cavity to the nozzle; and

and the one-way valve is connected in series with the pulse flow path and is communicated in a one-way mode from the liquid storage cavity to the water spraying port of the nozzle.

Optionally, the tooth flushing device comprises two one-way valves, and the two one-way valves are respectively arranged at the water inlet and the water outlet of the water pump.

Optionally, the check valve includes a valve body, a valve element, and a first elastic member, the valve body is provided with a liquid inlet channel, and a liquid inlet and a liquid outlet communicated with the liquid inlet channel, the valve element is movably disposed in the liquid inlet channel and faces the liquid inlet, the valve element is movable in the liquid inlet channel to block or open the liquid inlet, and the first elastic member is used for providing an elastic force for the valve element to drive the valve element to move from the liquid outlet to the liquid inlet.

Optionally, the valve core comprises a cylinder and a sealing head, the cylinder extends along the length direction of the liquid inlet channel, the first elastic member is sleeved on the cylinder, one end of the cylinder is connected with one end of the sealing head, and the other end of the sealing head can block the liquid inlet;

the sealing head is arranged in a gradually reducing manner from the liquid outlet to the liquid inlet.

Optionally, one of the inner side of the outer shell and the outer side of the inner shell is provided with a sliding groove, and the other one is provided with a sliding piece at a position corresponding to the sliding groove, the sliding groove extends in the height direction of the shell, and the sliding piece can slide in the sliding groove.

Optionally, the water pumping assembly comprises a water pipe, one end of the water pipe is communicated with the liquid storage cavity, the other end of the water pipe is communicated with a water inlet of the water pump, and the water pipe can be deformed in a telescopic mode along the length direction of the water pipe.

Optionally, the water pumping assembly further includes a second elastic member, the second elastic member is connected to two ends of the length of the water pipe along two deformed ends, and the second elastic member is configured to provide an elastic force to the water pipe to drive the water pipe to stretch and deform in the length direction of the water pipe.

Optionally, a mounting cavity is formed in the inner shell, the tooth flushing device comprises a circuit board and a battery which are respectively electrically connected with the water pumping assembly, and the circuit board, the battery and the water pump are all arranged in the mounting cavity.

Optionally, the water inlet pipe portion passes through the installation cavity and is communicated with the nozzle in the installation cavity.

Optionally, the tooth flusher further comprises a controller and a timer, the controller is electrically connected with the water pump, the timer is used for sending a closing signal to the controller after the water pump is started for a preset time period, and the controller controls the water pump to be closed when receiving the closing signal.

The utility model changes the volume of the liquid storage cavity by the mutual sliding between the outer shell and the inner shell, thus when a user needs to store the tooth flushing device, the outer shell and the inner shell can be close to each other by sliding, and the volume of the liquid storage cavity is reduced, thereby reducing the volume of the tooth flushing device; when the user need use towards the clean oral cavity of tooth ware, alright make shell and inner shell mutual slip keep away from to the volume in increase stock solution chamber and then the more tooth cleaning solution of storage, so, the user alright carry out a lot of cleanness to the oral cavity with using this towards tooth ware, it is visible, compare in the portability towards tooth ware of prior art, the towards tooth ware of this application, when satisfying the portability, also can satisfy the user and need carry out a lot of clear demands to the oral cavity, that is to say, the towards tooth ware of this application has the higher advantage of practicality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of the tooth rinsing device of the present invention;

FIG. 2 is a top view of the dental irrigator of FIG. 1;

FIG. 3 is a schematic view of the sealing lid of FIG. 2 in an open state;

FIG. 4 is a schematic view of the tooth irrigator of FIG. 1 with part of the structure omitted;

FIG. 5 is a cross-sectional view of the dental irrigator of FIG. 1;

FIG. 6 is an exploded view of the dental irrigator of FIG. 1;

fig. 7 is a partial enlarged view of a portion a in fig. 6.

The reference numbers illustrate:

1. a housing; 11. an inner shell; 111. a sliding groove; 112. a water adding channel; 113. a water adding port; 114. a sealing cover; 115. a mounting cavity; 12. a housing; 121. a slider; 122. mounting grooves; 13. a liquid storage cavity; 14. A seal ring; 15. a control key; 2. a nozzle; 21. a water spray pipeline; 22. a water jet; 3. a water pumping assembly; 31. a water inlet pipeline; 32. a water pump; 33. a water delivery pipe; 34. a second elastic member; 4. a one-way valve; 41. a valve body; 411. a liquid inlet channel; 411a and a liquid inlet; 411b, a liquid outlet; 42. a valve core; 421. A cylinder; 422. a sealing head; 43. a first elastic member; 5. a circuit board; 6. battery with a battery cell

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a tooth flushing device.

In the embodiment of the present invention, as shown in fig. 1, 5 and 6, the tooth flushing device includes a casing 1, a nozzle 2, a water pumping assembly 3 and a one-way valve 4, the casing 1 includes an inner casing 11 and an outer casing 12, the outer casing 12 is sleeved outside the inner casing 11 and is slidably connected with the inner casing 11, the outer casing 12 and the inner casing 11 are matched to form a liquid storage cavity 13, and the volume of the liquid storage cavity 13 can be changed along with the sliding of any one of the outer casing 12 and the inner casing 11;

a nozzle 2 provided in the housing 1;

the water pumping assembly 3 comprises a water inlet pipeline 31 and a water pump 32, one end of the water inlet pipeline 31 is communicated with the nozzle 2, the other end of the water inlet pipeline 31 is communicated with the liquid storage cavity 13, the water inlet pipeline 31 is matched with the nozzle 2 to form a pulse flow path, and the water pump 32 is connected in series with the pulse flow path and used for providing power for the liquid flowing from the liquid storage cavity 13 to the nozzle 2; and

the check valve 4 is connected in series with the pulse flow path, and the check valve 4 is communicated in a one-way direction from the liquid storage cavity 13 to the water spraying opening 22 of the nozzle 2.

Specifically, as shown in fig. 1 and 5, the tooth punching device includes a housing 1, the housing 1 includes an outer shell 12 and an inner shell 11, the outer shell 12 is provided with a mounting groove 122, the mounting groove 122 is disposed to be open to the outside, the size of the outer circumferential wall of the inner shell 11 is matched with the size of the groove opening of the mounting groove 122, the inner shell 11 can be slidably inserted into the mounting groove 122 through the groove opening, so that the outer shell 12 and the inner shell 11 can be assembled with each other, correspondingly, after the inner shell 11 is inserted into the mounting groove 122, the outer wall of the inner shell 11 and the inner wall of the mounting groove 122 are cooperatively formed with a reservoir 13, when the inner shell 11 slides compared with the outer shell 12 or the outer shell 12 slides compared with the inner shell 11, the volume of the reservoir 13 changes, so that when a user needs to store the tooth punching device in a backpack, a cabinet, or the like, the outer shell 12 and the inner shell 11 can slide close to each other, so as to reduce the volume of the liquid storage cavity 13 (namely, reduce the volume of the tooth flusher), and then store the tooth flusher; when the user need use this towards tooth ware clean oral cavity, alright make shell 12 and inner shell 11 mutual slip keep away from to the volume in increase stock solution chamber 13 is favorable to towards the tooth ware and stores more tooth cleaning solutions, and the user of being convenient for uses towards tooth ware and carries out a lot of oral cavity cleanness, that is to say, the ware of washing tooth of this application had both guaranteed towards the portability of tooth ware, has also improved towards the practicality of tooth ware.

Alternatively, as shown in fig. 5, a water adding passage 112 is formed through the inner housing 11, one end of the water adding passage 112 is communicated with the reservoir 13, and as shown in fig. 3, a water adding port 113 is formed at the other end of the inner housing 11 on the side away from the outer housing 12, and a user can add tooth cleaning liquid to the reservoir 13 through the water adding port 113.

Further, as shown in fig. 2, the water adding port 113 is provided with a sealing cover 114, the sealing cover 114 can be opened or closed relative to the water adding port, and the sealing cover 114 is used for ensuring that the liquid storage cavity 13 and the water adding channel 112 are not influenced by foreign matters such as dust, which is beneficial to ensuring the use sanitation of the tooth rinsing device.

Optionally, a sealing ring 14 is arranged at the joint between the inner shell 11 and the outer shell 12, and the sealing ring 14 is used for ensuring the sealing performance of the liquid storage cavity 13 after the inner shell 11 and the outer shell 12 are assembled with each other, which is beneficial to ensuring the sanitation of the use of the tooth flusher.

Specifically, as shown in fig. 1, the tooth irrigator includes a nozzle 2, and the nozzle 2 is detachably mounted on a housing 1, and in some embodiments, the nozzle 2 is mounted on an inner housing 11, and in other embodiments, the nozzle 2 is mounted on an outer housing 12. When the user cleans the oral cavity by using the tooth irrigator, the water jet 22 of the nozzle 2 is directed to the slit between the teeth, and then the tooth irrigator is started.

Specifically, as shown in fig. 6, the tooth flusher includes a water pumping assembly 3, the water pumping assembly 3 includes a water pump 32 and a water inlet pipeline 31, an arrow labeled "32" in fig. 6 shows an exploded structure of the water pump 32, specifically, the water pump 32 includes a motor, a pump body, a piston rod and other common parts, which are not described herein; the inlet channel forms in the inside of casing 1, after on the casing 1 is installed to nozzle 2, the one end and the nozzle 2 intercommunication of inlet channel 31, the other end and the stock solution chamber 13 intercommunication of inlet channel 31, like this, the intercommunication each other of the inlet channel 31 and the inside water spray pipeline 21 of nozzle 2 through pump water subassembly 3, the inside pulse flow path that has formed at the tooth ware promptly, after water pump 32 starts, the tooth cleaning solution alright follow stock solution chamber 13 through the pulse flow path and remove to the water jet 22 department of nozzle 2, then spout the slit of tooth to user's tooth.

Further, the tooth flusher of the present application adopts a mode of serially connecting the check valve 4 to the pulse flow path, so that the pulse flow path can be conducted in one direction only in the direction from the reservoir 13 to the water jet 22 of the nozzle 2 through the check valve 4.

After the water pump 32 is started, the air pressure difference can be formed between the two sides of the one-way valve 4 in the pulse flow path, so that the tooth cleaning liquid can be sprayed out from the water spray opening 22 of the nozzle 2, and after the water pump 32 is closed, the air pressure difference between the pulse flow path and the outside can also prevent the tooth cleaning liquid remained in the pulse flow path from leaking out from the water spray opening 22 of the nozzle 2.

It can be understood that the portable tooth-rinsing device in the prior art has the technical problem of low practicability, and in order to solve the problem, the volume of the liquid storage cavity 13 is changed by the mutual sliding between the outer shell 12 and the inner shell 11, so that when a user needs to store the tooth-rinsing device, the outer shell 12 and the inner shell 11 can be close to each other in a sliding manner, and the volume of the liquid storage cavity 13 is reduced, thereby reducing the volume of the tooth-rinsing device; when the user need use towards the clean oral cavity of tooth ware, alright make shell 12 and inner shell 11 mutual slip keep away from to increase stock solution chamber 13's volume and then save more tooth cleaning solutions, so, the user alright with this towards tooth ware and carry out a lot of cleanness to the oral cavity, it is visible, compare in prior art's portability towards tooth ware, the towards tooth ware of this application, when satisfying the portability, also can satisfy the user and need carry out a lot of clear demands to the oral cavity, that is to say, the towards tooth ware of this application has the higher advantage of practicality.

Optionally, as shown in fig. 6, the tooth flusher comprises two one-way valves 4, and the two one-way valves 4 are respectively arranged at the water inlet and the water outlet of the water pump 32. It can be understood that two check valves 4 are all from stock solution chamber 13 to the direction one-way conduction of the water jet 22 of nozzle 2, set up two check valves 4 on the pulse flow path, can effectively avoid the under-pressure condition of pulse flow path, arrange respectively on the water inlet and the delivery port of water pump 32 through making two check valves 4, so set up, can effectively guarantee water pump 32's structural seal nature.

Alternatively, as shown in fig. 7, the check valve 4 includes a valve body 41, a valve core 42 and a first elastic member 43, the valve body 41 is provided with a liquid inlet channel 411, and a liquid inlet 411a and a liquid outlet 411b communicated with the liquid inlet channel 411, the valve core 42 is movably disposed in the liquid inlet channel 411 and faces the liquid inlet 411a, the valve core 42 can move in the liquid inlet channel 411 to close or open the liquid inlet 411a, and the first elastic member 43 is configured to provide an elastic force to the valve core 42 to drive the valve core 42 to move in a direction from the liquid outlet 411b to the liquid inlet 411 a.

It should be noted that the first elastic member 43 is preferably a spring, and the design of the present application is not limited thereto, and in other embodiments, the first elastic member 43 may also be a component having an elastic force, such as an elastic rubber band, and the like, and the design is not limited thereto.

Specifically, when the tooth cleaning liquid in the liquid storage cavity 13 moves from the liquid inlet 411a to the liquid outlet 411b, an external force is applied to the valve element 42, and the valve element 42 has a tendency to move from the liquid inlet 411a to the liquid outlet 411b under the driving of the external force; when the external force is greater than the elastic force, the valve element 42 moves in the direction away from the liquid inlet 411a, the liquid inlet 411a is opened, the tooth cleaning liquid can move in the pulse flow path from the liquid storage cavity 13 to the water spray opening 22 of the nozzle 2, and when the external force is less than the elastic force, the valve element 42 moves in the direction close to the liquid inlet 411a to seal the liquid inlet 411 a.

It can be understood, the machine pump body among the prior art is often used the slit to do business turn over water and is cut off, use the fatigue life who surpasss the material after a period, the slit can the grow lead to unable non return flowing water and become invalid, to this problem, this application has utilized the high fatigue resistance characteristic of spring, even check valve 4 is used for a long time, the spring still can effectually provide an elastic force to case 42, in order to order about case 42 from liquid outlet 411b to the direction removal of inlet 411a and shutoff inlet 411a, thereby prolong check valve 4's life, tooth ware's use reliability has been guaranteed towards.

Optionally, as shown in fig. 7, the valve core 42 includes a cylinder 421 and a sealing head 422, the cylinder 421 extends along the length direction of the liquid inlet channel 411, the first elastic member 43 is sleeved on the cylinder 421, one end of the cylinder 421 is connected to one end of the sealing head 422, and the other end of the sealing head 422 can seal the liquid inlet 411 a; the sealing head 422 is tapered from the liquid outlet 411b to the liquid inlet 411 a. It can be understood that the sealing head 422 is arranged in a tapering manner from the liquid outlet 411b to the liquid inlet 411a, so that the sealing head 422 can be better inserted into the liquid inlet 411a when moving from the liquid outlet 411b to the liquid inlet 411a, and then the liquid inlet 411a is blocked, and the operation reliability of the check valve 4 is improved.

Alternatively, as shown in fig. 4 and 6, one of the inner side of the outer case 12 and the outer side of the inner case 11 is provided with a slide groove 111, and the other is provided with a slider 121 at a position corresponding to the slide groove 111, the slide groove 111 extends in the height direction of the housing 1, and the slider 121 is slidable in the slide groove 111. It will be appreciated that the sliding fit between the sliding member 121 and the sliding groove 111 is a common embodiment of the sliding connection, and has the advantages of simple structure, reliable connection, etc.

Optionally, as shown in fig. 4, the water pumping assembly 3 includes a water pipe 33, one end of the water pipe 33 is communicated with the liquid storage cavity 13, the other end is communicated with the water inlet of the water pump 32, and the water pipe 33 is telescopically deformable along its length direction. It can be understood that, one end of the water pipe 33 is installed at one side of the inner shell 11 facing the outer shell 12, the other end extends in a direction close to the liquid storage cavity 13, and the water pipe 33 is telescopically deformed in the extending direction, so that when the inner shell 11 and the outer shell 12 slide to each other and approach, the water pipe 33 can be folded and stored between the inner shell 11 and the outer shell 12, a user can conveniently store the tooth flushing device, when the inner shell 11 and the outer shell 12 slide to each other and leave away, the water pipe 33 can be unfolded between the inner shell 11 and the outer shell 12 to extend into the liquid storage cavity 13 between the inner shell 11 and the outer shell 12, and the supply of the pulse flow path liquid is ensured.

Specifically, the water duct 33 may be a folded tube, a flexible tube, or the like.

Optionally, as shown in fig. 4 and 6, the water pumping assembly 3 further includes a second elastic member 34, the second elastic member 34 is connected to two ends of the length of the water pipe 33 along two ends of the deformation, and the second elastic member 34 is configured to provide an elastic force to the water pipe 33 to drive the water pipe 33 to stretch and deform in the length direction thereof.

It should be noted that the second elastic member 34 is preferably a spring, and the design of the present invention is not limited thereto, and in other embodiments, the second elastic member 34 may also be a component having an elastic force, such as an elastic rubber band, and the like, and the design is not limited thereto.

It can be understood that when the inner shell 11 and the outer shell 12 slide close to each other, the second elastic element 34 is elastically compressed, and when the inner shell 11 and the outer shell 12 slide away from each other, the second elastic element 34 elastically restores, and in the process of restoring the shape of the second elastic element 34, the water pipe 33 is driven to stretch, so that the normal unfolding of the water pipe 33 is ensured.

Optionally, as shown in fig. 5, a mounting cavity 115 is formed in the inner shell 11, the tooth-rinsing device includes a circuit board 5 and a battery 6 electrically connected to the water pumping assembly 3, respectively, and the circuit board 5, the battery 6 and the water pump 32 are all disposed in the mounting cavity 115. It can be understood that all install electrical components such as water pump 32, circuit board 5 and battery in installation cavity 115, the various electrical components of tooth ware of being convenient for to wash in the technology carry out unified loading and unloading, simultaneously, with electrical components integration in same installation cavity 115, be convenient for improve the utilization ratio of 1 inner space of casing effectively, also be favorable to reducing the volume of tooth ware of washing, be convenient for wash tooth ware and accomodate.

Optionally, the inlet conduit 31 extends partially through the mounting cavity 115 and communicates with the nozzle 2 at the mounting cavity 115. Can understand, so set up, improved 1 inner space's of casing utilization ratio effectively, also be favorable to reducing the volume of towards the tooth ware, be convenient for towards the tooth ware and accomodate.

Optionally, the tooth flusher further comprises a controller and a timer, the controller is electrically connected with the water pump 32, the timer is used for sending a closing signal to the controller after the water pump 32 is started for a preset time period, and the controller controls the water pump 32 to be closed when receiving the closing signal. This wherein, controller and timer are all integrated on the circuit board 5 of towards the tooth ware, can understand, the tooth ware of towards of this application starts long back when presetting at water pump 32, and automatic control water pump 32 closes, so, in order to avoid the user to use to wash the tooth ware and carry out the clear time overlength to the oral cavity, lead to causing the phenomenon of wearing and tearing to the oral mucosa, humanized and intelligent guarantee user's oral cavity safety, be favorable to improving user's use and experience.

Optionally, the preset duration has a value range of: 80 seconds ~ 100 seconds, this wherein, the value range of presetting duration is that the actual data through this application is carried out the comprehensive consideration and is obtained, can understand, when presetting duration is less than 80 seconds, can't effectual assurance towards the clean effect of tooth ware, and when presetting duration is greater than 100 seconds, then cause wearing and tearing to the oral cavity easily. Preferably, the preset time period is 90 seconds.

Alternatively, as shown in FIG. 1, the controller may receive a user's key command to control the activation of the water pump 32. Correspondingly, the housing 1 is provided with a control key 15 electrically connected with the controller.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A dental irrigator, comprising:

the shell comprises an inner shell and an outer shell, the outer shell is sleeved on the outer side of the inner shell and is in sliding connection with the inner shell, a liquid storage cavity is formed by matching the outer shell and the inner shell, and the volume of the liquid storage cavity can be changed along with the sliding of any one of the outer shell and the inner shell;

the nozzle is arranged on the shell;

2. The dental irrigator of claim 1, wherein said dental irrigator includes two one-way valves, said two one-way valves being disposed at a water inlet and a water outlet of said water pump, respectively.

3. The apparatus as claimed in claim 1, wherein the check valve comprises a valve body, a valve element and a first elastic member, the valve body has a liquid inlet channel, and a liquid inlet and a liquid outlet communicated with the liquid inlet channel, the valve element is movably disposed in the liquid inlet channel and faces the liquid inlet, the valve element is movable in the liquid inlet channel to close or open the liquid inlet, and the first elastic member is configured to provide an elastic force to the valve element to drive the valve element to move in a direction from the liquid outlet to the liquid inlet.

4. The tooth flusher according to claim 3, wherein the valve core comprises a cylinder and a sealing head, the cylinder extends along the length direction of the liquid inlet channel, the first elastic piece is sleeved on the cylinder, one end of the cylinder is connected with one end of the sealing head, and the other end of the sealing head can block the liquid inlet;

5. The dental irrigator of claim 1 wherein one of the inside of said outer housing and the outside of said inner housing is provided with a slide groove extending in the height direction of said housing, and the other is provided with a slide member at a position corresponding to said slide groove, said slide member being slidable in said slide groove.

6. The water toothpick according to claim 1, wherein the water pumping assembly comprises a water pipe, one end of the water pipe is communicated with the liquid storage cavity, the other end of the water pipe is communicated with the water inlet of the water pump, and the water pipe is capable of being deformed in a telescopic manner along the length direction of the water pipe.

7. The water flushing device as claimed in claim 6, wherein said water pumping assembly further comprises a second elastic member, said second elastic member is connected to two ends of the length of said water pipe along two deformed ends, respectively, said second elastic member is configured to provide an elastic force to said water pipe to drive said water pipe to stretch and deform in its own length direction.

8. The dental irrigator of claim 1 wherein a mounting cavity is formed in said inner housing, said dental irrigator including a circuit board and a battery electrically connected to said water pumping assembly, respectively, said circuit board, battery and said water pump being disposed in said mounting cavity.

9. The dental irrigator of claim 8 wherein said water inlet conduit portion extends through said mounting cavity and communicates with said nozzle at said mounting cavity.

10. The dental irrigator of claim 1 further comprising a controller electrically connected to the water pump and a timer for sending a shut down signal to the controller after the water pump is activated for a preset duration, wherein the controller controls the water pump to shut down when the shut down signal is received.