CN218870540U - Nozzle device for tooth washing device and tooth washing device - Google Patents

Abstract

The utility model provides a nozzle device for a tooth washing device and the tooth washing device. The nozzle device for a dental prophylaxis device comprises: the second shell limits an accommodating cavity extending along a first preset axis and a plurality of liquid outlet channels communicated with the accommodating cavity; the cyclone structure is arranged in the accommodating cavity, the cyclone structure is provided with a fluid channel extending along a first preset axis and a plurality of cyclone grooves communicated with the fluid channel, the cyclone grooves are arranged on the inner wall of the fluid channel at intervals around the first preset axis, the cyclone grooves penetrate through the cyclone structure along the first preset axis, the inlet end of the fluid channel is communicated with the inside of the first shell, the outlet end of the fluid channel is communicated with the liquid outlet channels, the cyclone grooves are constructed in a manner that fluid entering the cyclone grooves flows to the fluid channel and forms vortex-shaped fluid in the fluid channel, and the vortex-shaped fluid is sprayed out through the liquid outlet channels. The technical scheme of the utility model the not good problem of the clean effect of mouth cavity of the nozzle device for the tooth cleaner among the prior art has been solved.

Description

Nozzle device for tooth washing device and tooth washing device

Technical Field

The utility model relates to a personal care equipment technical field particularly, relates to a water toothpick uses nozzle device and water toothpick.

Background

The tooth washing device can be used as a novel auxiliary tool for cleaning the oral cavity and can clean the oral cavity. The tooth washing device generally cleans the oral cavity by using water flow sprayed under certain pressure.

In the prior art, the nozzle of the tooth washing device is only provided with a flow limiting hole simply, fluid is sprayed out of the nozzle directly after being accelerated by the flow limiting hole, the fluid sprayed out of the nozzle is a single water column, only local cleaning of the oral cavity can be realized, the covered cleaning area is small, and the cleaning force of the single water column directly sprayed out of the nozzle is weak, so that the problem of poor oral cavity cleaning effect can be caused.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a nozzle device for a tooth washing device and a tooth washing device, which solve the problem that the nozzle device for the tooth washing device in the prior art has poor cleaning effect on the oral cavity.

In order to achieve the above object, the present invention provides a nozzle device for a dental irrigator, comprising: a first housing; the second shell is connected with the first shell and limits an accommodating cavity extending along a first preset axis and a plurality of liquid outlet channels communicated with the accommodating cavity; the cyclone structure is arranged in the accommodating cavity, the cyclone structure is provided with a fluid channel extending along a first preset axis and a plurality of cyclone grooves communicated with the fluid channel, the cyclone grooves are arranged on the inner wall of the fluid channel at intervals around the first preset axis, the cyclone grooves penetrate through the cyclone structure along the first preset axis, the inlet end of the fluid channel is communicated with the inside of the first shell, the outlet end of the fluid channel is communicated with the liquid outlet channels, the cyclone grooves are constructed in a manner that fluid entering the cyclone grooves flows to the fluid channel and forms vortex-shaped fluid in the fluid channel, and the vortex-shaped fluid is sprayed out through the liquid outlet channels.

Further, the fluid passage is a tapered through hole which penetrates through the rotational flow structure along a first preset axis, and the inner diameter of the tapered through hole is gradually reduced from the inlet end of the fluid passage to the outlet end of the fluid passage.

Furthermore, the rotational flow structure comprises a base and a columnar structure arranged on the base and extending along a first preset axis, the columnar structure is located on one side, departing from the first shell, of the base, and the rotational flow groove penetrates through the columnar structure along the radial direction of the columnar structure, so that fluid can be sprayed out from the peripheral side of the rotational flow structure.

Further, the plurality of swirl slots are arranged in central symmetry relative to the first preset axis.

Furthermore, an included angle is formed between the central axis of at least one of the liquid outlet channels and the first preset axis, so that the angles of the liquid outlet channels for ejecting the fluid are different.

Furthermore, the first shell limits the liquid inlet channel and the speed increasing channel which are communicated with each other and extend along a first preset axis, the inner diameter of the speed increasing channel is smaller than that of the liquid inlet channel, and the liquid inlet channel, the speed increasing channel and the containing cavity are sequentially arranged along the first preset axis.

Furthermore, the nozzle device for the tooth washer further comprises a water blocking piece located in the containing cavity, the water blocking piece is located between the rotational flow structure and the first shell, the water blocking piece is provided with a speed increasing through hole, the speed increasing through hole can be communicated with the speed increasing channel and the fluid channel, and the inner diameter of the speed increasing through hole is smaller than that of the speed increasing channel.

Further, the ratio of the inner diameter of the speed-increasing through hole to the inner diameter of the speed-increasing channel is greater than or equal to 0.22 and less than or equal to 0.275.

Furthermore, the speed increasing channel comprises a reducing section, a straight hole section and a reaming section which are sequentially communicated, the inner diameter of the reducing section is gradually reduced from the inlet of the speed increasing channel to the outlet of the speed increasing channel, and the inner diameter of the reaming section is gradually increased to form a laval nozzle structure.

Further, the second housing includes: the connecting cylinder section is provided with a mounting through hole; the liquid spraying structure is a cylinder with an opening at one end and a closed other end, the opening end is connected with the first shell through a connecting cylinder section, the inside of the cylinder and the mounting through hole form an accommodating cavity, a plurality of spray holes are formed in the circumferential side wall and the bottom wall of the cylinder, and the spray holes form a liquid outlet channel.

The cylinder body comprises a first cylinder section and a second cylinder section which are connected, one end of the second cylinder section, which is far away from the first cylinder section, is closed, the peripheral outer wall of the first cylinder section is provided with a first external thread, the inner wall of the connecting cylinder section is provided with a first internal thread, the first external thread is matched with the first internal thread, and the second cylinder section is provided with a spray hole; or the circumferential outer wall of the first shell is provided with second external threads, the inner wall of the mounting through hole is provided with second internal threads, and the second external threads are matched with the second internal threads.

Further, the ratio of the inner diameter of the liquid inlet channel to the inner diameter of the speed increasing channel is greater than or equal to 1.5 and less than or equal to 1.6.

According to the utility model discloses a tooth washing device, including tooth washing device main part and foretell nozzle device for tooth washing device, be equipped with the delivery port in the tooth washing device main part, first casing cartridge is in delivery port department, the inside of delivery port and first casing.

Compared with the prior art in which only one flow limiting hole for acceleration is arranged, in the embodiment, by arranging the rotational flow structure, the high-pressure pulse type fluid sent out by the power pump forms the pulse type vortex-shaped fluid under the action of the rotational flow structure, on one hand, the liquid outlet channel can jet out the vortex-shaped turbulent flow, so that the cleaning force of the fluid is increased, and the cleaning effect on the oral cavity is further improved; on the other hand, the fluid can be more fully contacted with the inner wall of the second shell, so that the high-speed vortex-shaped fluid flowing out of the vortex structure can be divided into a plurality of water columns through the liquid outlet channels to be sprayed out, the covering area of the fluid in the oral cavity can be increased, the cleaning area is enlarged, and the cleaning effect on the oral cavity is improved. Therefore, the nozzle device for the tooth washing device of the embodiment can solve the problem that the nozzle device for the tooth washing device in the prior art has poor oral cavity cleaning effect.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of a nozzle assembly for a dental prophylaxis device according to an embodiment of the present invention;

FIG. 2 illustrates a cross-sectional view of the nozzle assembly for the dental prophylaxis device of FIG. 1;

FIG. 3 is a schematic exploded view of the nozzle assembly for the dental prophylaxis device of FIG. 1;

FIG. 4 illustrates a schematic structural view of a first housing of the nozzle device for a dental prophylaxis device of FIG. 1;

FIG. 5 is a schematic view showing a liquid spray structure of the nozzle device for a dental prophylaxis device of FIG. 1;

FIG. 6 is a schematic view of the connecting barrel section of the nozzle assembly for the dental prophylaxis device of FIG. 1;

FIG. 7 is a schematic structural view illustrating an embodiment of a swirling structure of the nozzle device for the dental irrigator of FIG. 1;

FIG. 8 shows a top view of the swirling structure of FIG. 7;

FIG. 9 shows a bottom view of the swirling structure of FIG. 7;

FIG. 10 shows a cross-sectional view of the swirling structure of FIG. 7;

FIG. 11 is a schematic view showing another example of a swirling structure of the nozzle device for a dental irrigator of FIG. 1;

FIG. 12 shows a top view of the swirling structure of FIG. 11;

FIG. 13 shows a bottom view of the swirling structure of FIG. 11;

FIG. 14 shows a cross-sectional view of the swirling structure of FIG. 11;

FIG. 15 is a schematic structural view showing another embodiment of a swirling structure of the nozzle device for the dental irrigator of FIG. 1; and

FIG. 16 is a schematic view showing another example of the swirling structure of the nozzle device for a dental irrigator of FIG. 1.

Wherein the figures include the following reference numerals:

10. a first housing; 11. a liquid inlet channel; 12. a speed increasing channel; 121. a reducing section; 122. a straight hole section; 123. a reaming section; 20. a second housing; 21. an accommodating cavity; 22. a liquid outlet channel; 23. connecting the cylinder sections; 24. a liquid spraying structure; 241. a first barrel section; 242. a second barrel section; 30. a rotational flow structure; 31. a fluid channel; 32. a swirling flow groove; 33. a base; 34. a columnar structure; 50. a water blocking member; 51. and a speed-increasing through hole.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that, in the embodiment of the present invention, the cleaning solution in the water tank of the tooth washing device is pumped to the liquid inlet channel 11 of the nozzle device of the present embodiment after being pressurized by the power pump, and is sprayed out through the nozzle device, so as to clean the oral cavity.

As shown in fig. 1 to 3, an embodiment of the present invention provides a nozzle device for a dental irrigator. The nozzle device for the dental prophylaxis device includes a first housing 10, a second housing 20, and a swirling structure 30. The second shell 20 is connected with the first shell 10, and the second shell 20 defines an accommodating cavity 21 extending along a first preset axis and a plurality of liquid outlet channels 22 communicated with the accommodating cavity 21; the swirling structure 30 is disposed in the accommodating chamber 21, the swirling structure 30 is provided with a fluid passage 31 extending along a first predetermined axis and a plurality of swirling grooves 32 communicating with the fluid passage 31, the plurality of swirling grooves 32 are disposed on an inner wall of the fluid passage 31 at intervals around the first predetermined axis, the swirling grooves 32 penetrate through the swirling structure 30 along the first predetermined axis, an inlet end of the fluid passage 31 communicates with the inside of the first housing 10, an outlet end of the fluid passage 31 communicates with the plurality of liquid outlet passages 22, the swirling grooves 32 are configured such that fluid entering the swirling grooves 32 flows into the fluid passage 31 and forms swirling fluid in the fluid passage 31, and the swirling fluid is ejected through the plurality of liquid outlet passages 22.

In the above technical solution, compared with the prior art in which only one flow-limiting hole is provided for acceleration, in this embodiment, by providing the rotational flow structure 30, the high-pressure pulse fluid pumped by the power pump forms a pulse type vortex-shaped fluid under the action of the rotational flow structure 30, on one hand, the liquid outlet channel 22 can eject a vortex-shaped turbulent flow, so as to increase the cleaning force of the fluid, and further improve the cleaning effect on the oral cavity; on the other hand, the fluid can be more fully contacted with the inner wall of the second housing 20, so that the high-speed vortex-shaped fluid flowing out from the vortex structure 30 can be divided into a plurality of water columns through the plurality of liquid outlet channels 22 to be sprayed out, and thus, the coverage area of the fluid in the oral cavity can be increased, the cleaning area is enlarged, and the cleaning effect on the oral cavity is improved. Therefore, the nozzle device for the tooth washing device of the embodiment can solve the problem that the nozzle device for the tooth washing device in the prior art has poor oral cavity cleaning effect.

Further, compared with the case that the fluid is accelerated to form a water column and is ejected from the liquid outlet channel, by providing the rotational flow structure 30, the fluid ejected from the speed increasing channel 12 can be diffused to increase the uniformity of the fluid entering the plurality of liquid outlet channels 22, so that the fluid can be ejected from the plurality of liquid outlet channels 22 more uniformly, and the cleaning uniformity is improved under the condition that the cleaning area is enlarged.

As shown in fig. 2, in the embodiment of the present invention, an included angle is formed between the central axis of at least one of the liquid outlet channels 22 and the first predetermined axis, and an included angle is formed between the liquid outlet channels 22, so that the angles of the liquid outlet channels 22 ejecting the fluid are different.

Through the arrangement, the fluid can be sprayed out in a dispersed mode at different angles, the spraying direction of the fluid can be increased, the cleaning area of the fluid is increased, the covering area of the fluid in the oral cavity is increased, and the cleaning area is enlarged.

Specifically, the embodiment of the present invention provides a swirl fluid formed by the action of the swirling structure 30, which can fully contact with the air in the accommodating chamber 21 and the inner wall surface of the accommodating chamber 21 at a high speed, and under the interaction of the liquid surface tension, viscosity and air resistance, the fluid is dispersed and sprayed with water mist jet flow at different angles by a plurality of liquid outlet channels 22, so as to not only massage oral cavity and gum softly, but also increase the cleaning area.

In one embodiment, the fluid may also be ejected in parallel through a plurality of outlet channels 22.

Preferably, in the embodiment of the present invention, the number of the swirl grooves 32 is four, four swirl grooves 32 are uniformly spaced around the first preset axis, and the included angle between two adjacent swirl grooves 32 is 90 °.

Specifically, in an embodiment of the present invention, the fluid in the plurality of swirl grooves 32 may flow into the fluid channel 31 and merge with the fluid in the fluid channel 31 to form a swirl fluid.

As shown in fig. 2, in the embodiment of the present invention, the first casing 10 limits the liquid inlet channel 11 and the speed increasing channel 12 which are communicated with each other and extend along the first preset axis, the inner diameter of the speed increasing channel 12 is smaller than the inner diameter of the liquid inlet channel 11, and the liquid inlet channel 11, the speed increasing channel 12 and the accommodating cavity 21 are sequentially arranged along the first preset axis.

Through the above arrangement, the flow velocity of the fluid can be increased, so that the fluid enters the swirling structure 30 at a high speed, and the swirling effect is increased to form a high-speed swirling turbulence, and thus, the cleaning force of the fluid can be improved.

It should be noted that, in the embodiment of the present invention, after the fluid entering from the liquid inlet channel 11 enters the speed increasing channel 12 with smaller inner diameter, the fluid will generate pressure loss, so that the fluid pressure in the speed increasing channel 12 is smaller than the fluid pressure in the liquid inlet channel 11, according to the formula p +0.5 ρ v of bernoulli equation ² As can be seen from + ρ gh = C, the fluid velocity in the speed increasing channel 12 is greater than the fluid velocity in the liquid inlet channel 11, and the effect of increasing the fluid velocity is achieved.

Alternatively, it can be understood that, according to the law of conservation of energy, since the inner diameter of the liquid inlet channel 12 is smaller than the inner diameter of the liquid inlet channel 11, the impulse of the fluid in the liquid inlet channel 11 is converted into the kinetic energy of the liquid inlet channel 12, that is, the larger the fluid pressure difference between the liquid inlet channel 11 and the liquid inlet channel 12 is, the larger the kinetic energy of the liquid inlet channel 12 is, and the larger the fluid subjected to flow restriction is, the larger the acceleration of the fluid.

Specifically, in the embodiment of the present invention, the outer wall surface of the end of the first casing 10 where the liquid inlet channel 11 is provided with a clamping groove to realize the quick detachment of the nozzle device.

Specifically, in the embodiment of the present invention, the first casing 10 is further provided with a flow-through chamber communicated with the speed increasing channel 12, and the inner diameter of the flow-through chamber is greater than the inner diameter of the speed increasing channel 12.

As shown in fig. 2, 3, 7 and 10, in the embodiment of the present invention, the fluid passage 31 is a tapered through hole penetrating through the rotational flow structure 30 along the first predetermined axis, and the inner diameter of the tapered through hole gradually decreases from the inlet end of the fluid passage 31 to the outlet end of the fluid passage 31.

Among the above-mentioned technical scheme, for only utilizing a restricted aperture to realize the fluid with higher speed among the prior art, this embodiment is through setting up the toper through-hole, and the fluid not only can realize accelerating once more through the toper through-hole after accelerating through increasing speed passageway 12 to increase the whirl effect, thereby increase fluidic cleaning power, and then improve the clean effect to the cavity.

As shown in fig. 3, 11 to 14 and 16, in an embodiment of the present invention, the rotational flow structure 30 includes a base 33 and a columnar structure 34 disposed on the base 33 and extending along a first predetermined axis, the columnar structure 34 is located on a side of the base 33 away from the first housing 10, and the rotational flow groove 32 penetrates through the columnar structure 34 along a radial direction of the columnar structure 34, so that the fluid can be ejected from a peripheral side of the rotational flow structure 30.

Through the arrangement, the vortex-shaped fluid in the fluid channel 31 can flow out along the radial direction of the rotational flow structure 30 through the plurality of rotational flow grooves 32, so that the fluid can be sprayed out from the peripheral side of the rotational flow structure 30, and thus, along the first preset axis, the fluid can be more uniformly dispersed in the second shell 20 to increase the uniformity of entering the plurality of liquid outlet channels 22, so that the fluid can be more uniformly sprayed out from the plurality of liquid outlet channels 22 at different angles, and further, under the condition of enlarging the cleaning area, the cleaning uniformity is improved.

In one embodiment, as shown in fig. 7 to 10 and 15, the swirling groove 32 may extend in the radial direction of the columnar structure 34, but does not penetrate the columnar structure 34 as long as a swirling fluid can be formed in the fluid passage 31.

In one embodiment, as shown in fig. 11 to 14 and fig. 15, a projection of the swirling groove 32 in a first predetermined plane is an arc shape, wherein the first predetermined plane is perpendicular to the first predetermined axis.

In one embodiment, as shown in fig. 7 to 10 and 16, a projection of the swirl groove 32 in a first predetermined plane is rectangular, wherein the first predetermined plane is perpendicular to the first predetermined axis.

Preferably, in the embodiment of the present invention, the columnar structure 34 is tapered, and from the inlet end of the fluid channel 31 to the outlet end of the fluid channel 31, the outer diameter of the columnar structure 34 is gradually reduced, so as to facilitate the processing.

As shown in fig. 7 to 14, in the embodiment of the present invention, the plurality of swirl grooves 32 are arranged in a central symmetry manner with respect to the first predetermined axis.

With the above arrangement, a swirl-like fluid can be formed in the fluid passage 31 more favorably, and a symmetrical swirl-like fluid can be formed, so that the fluid can be diffused more uniformly in the second casing 20.

As shown in fig. 2 and 3, in the embodiment of the present invention, the nozzle device for a dental irrigator further includes a water blocking member 50 located in the accommodating cavity 21, the water blocking member 50 is located between the rotational flow structure 30 and the first housing 10, the water blocking member 50 is provided with an acceleration through hole 51, the acceleration through hole 51 can communicate with the acceleration channel 12 and the fluid channel 31, and the inner diameter of the acceleration through hole 51 is smaller than the inner diameter of the acceleration channel 12.

Through the arrangement, the speed-increasing through holes 51 can accelerate the high-speed fluid flowing in from the speed-increasing channel 12 for the second time, so that the speed of the fluid flowing into the rotational flow structure 30 is increased, and then the fluid is accelerated to be sprayed out from the liquid outlet channels 22 through the rotational flow structure 30, so that the speed of the fluid spraying can be increased, the cleaning force of the fluid is increased, and the cleaning effect of the oral cavity is improved.

Specifically, in the embodiment of the present invention, the inner diameter of the inlet end of the fluid channel 31 of the swirling structure 30 is larger than the inner diameter of the speed-increasing through hole 51 of the water blocking member 50, so that the swirling structure 30 collects the fluid flowing out from the speed-increasing through hole 51.

Preferably, in the embodiment of the present invention, the water blocking member 50 is made of a rust-proof material, preferably a ceramic gasket.

Preferably, in an embodiment of the present invention, the inner diameter of the inlet end of the fluid channel 31 is 1.4mm ± 0.2mm.

Preferably, in the embodiment of the present invention, the swirling structure 30 is attached to the water blocking member 50, so as to increase the amount of fluid entering the fluid channel 31.

Preferably, in an embodiment of the present invention, the nozzle device for a dental scaler further includes a sealing ring located in the accommodating cavity 21, a groove is disposed on one side of the water blocking member 50 away from the rotational flow structure 30, the sealing ring is located in the groove, the first shell 10 compresses the sealing ring in the groove, and the sealing ring is deformed and then contacts with the inner wall of the second shell 20, so that the sealing between the first shell 10 and the second shell 20 can be achieved.

Preferably, in the embodiment of the present invention, the ratio of the inner diameter of the speed increasing through hole 51 to the inner diameter of the speed increasing channel 12 is greater than or equal to 0.23, and less than or equal to 0.275. In this way, the flow velocity of the fluid and the effective area of the water mist jet can be increased more effectively.

Preferably, in the embodiment of the present invention, the inner diameter of the speed increasing channel 12 is greater than or equal to 2.4mm and less than or equal to 2.6mm, and the inner diameter of the speed increasing through hole 51 is greater than or equal to 0.6mm and less than or equal to 0.66mm. The inner diameter of the speed increasing channel 12 is preferably 2.4mm, and the inner diameter of the speed increasing through hole 51 is preferably 0.6mm.

As shown in fig. 2 and 4, in the embodiment of the present invention, the speed increasing channel 12 includes a reducing section 121, a straight hole section 122 and a reaming section 123 which are sequentially connected, from the inlet of the speed increasing channel 12 to the outlet of the speed increasing channel 12, the inner diameter of the reducing section 121 is gradually reduced, and the inner diameter of the reaming section 123 is gradually increased to form a laval nozzle structure.

Among the above-mentioned technical scheme, utilize Larwall spray tube principle, the fluid that gets into by inlet channel 11 can flow out after looping through reducing section 121, straight hole section 122 and reaming section 123, like this, can increase the fluid speed that gets into acceleration rate passageway 12 effectively to increase fluidic cleaning power, and then improve the clean effect to the cavity.

It should be noted that, in the embodiment of the present invention, under the condition of extreme flow rate (sonic velocity), the reaming section 123 can increase the flow rate instead, so as to further increase the flow rate of the fluid, thereby forming the supersonic fluid.

As shown in fig. 3, 5 and 6, in the embodiment of the present invention, the second housing 20 includes a connecting cylinder section 23 and a liquid spray structure 24. Wherein, the connecting cylinder section 23 is provided with a mounting through hole; the liquid spraying structure 24 is a cylinder with an opening at one end and a closed end at the other end, the opening end is connected with the first shell 10 through a connecting cylinder section 23, the inside of the cylinder and the installation through hole form an accommodating cavity 21, and a plurality of spray holes are formed in the circumferential side wall and the bottom wall of the cylinder and form a liquid outlet channel 22.

Through the arrangement, a sufficient arrangement area can be provided for the liquid outlet channel 22, and the fluid entering the liquid spraying structure 24 can be ejected from the peripheral side and the end face of the liquid spraying structure 24, so that the exit angle and the exit area of the fluid are increased, the coverage area of the fluid in the oral cavity is increased, the cleaning area is enlarged, and the cleaning effect is improved.

It should be noted that, in the embodiment of the present invention, the circumferential side wall and the bottom wall of the cylinder may block the fluid ejected from the swirling structure 30, and the solid structure between two adjacent nozzles may cut the fluid, so that the flow may be diffused in a mist form.

Because the water jet of the tooth cleaner nozzle in the prior art is a single water column, the water jet can not form circumferential water mist, has impact damage to the sensitive crowd of the oral cavity gum and lacks the effect of softly cleaning and massaging the oral cavity gum line.

Therefore, in the embodiment of the present invention, the liquid spraying structure 24 may be formed of a filter net, so that the meshes of the filter net may form spray holes, thereby spraying circumferential water mist from the nozzle to softly clean the oral cavity gum line of the massage user. Wherein the mesh number of the filter screen is preferably 120-170 meshes.

As shown in fig. 2, fig. 5 and fig. 6, in the embodiment of the present invention, the cylinder includes a first cylinder section 241 and a second cylinder section 242 that are connected, the one end of the second cylinder section 242 that deviates from the first cylinder section 241 is sealed, the peripheral side outer wall of the first cylinder section 241 is provided with a first external thread, the inner wall of the connecting cylinder section 23 is provided with a first internal thread, the first external thread is matched with the first internal thread, and the second cylinder section 242 is provided with a nozzle hole.

In the above technical solution, the liquid spraying structure 24 is connected with the connecting cylinder section 23 through a screw thread, so that the liquid spraying structure 24 is convenient to detach and replace.

As shown in fig. 2, fig. 4 and fig. 6, in the embodiment of the present invention, the circumferential outer wall of the first casing 10 is provided with a second external thread, the inner wall of the mounting through hole is provided with a second internal thread, and the second external thread is matched with the second internal thread.

In the above technical solution, the first housing 10 and the connecting cylinder section 23 are connected by a screw thread, so that the first housing 10 is convenient to detach and replace.

Specifically, in the embodiment of the utility model, the installation through-hole of connecting barrel section 23 includes that two are linked together and the different hole sections of internal diameter, forms the step face between two hole sections, and water-blocking piece 50 is located between step face and first casing 10, like this, can fix water-blocking piece 50, and base 33 of whirl structure 30 is located between first barrel section 241 and water-blocking piece 50, can fix whirl structure 30 like this.

Preferably, in an embodiment of the present invention, a ratio of an inner diameter of the liquid inlet channel 11 to an inner diameter of the speed increasing channel 12 is greater than or equal to 1.5, and less than or equal to 1.6. Thus, the speed increasing effect of the speed increasing tunnel 12 can be effectively improved.

The embodiment of the utility model provides a tooth washing device. The water toothpick comprises a water toothpick main body and the nozzle device for the water toothpick, a water outlet is arranged on the water toothpick main body, the first shell 10 is inserted at the water outlet, and the water outlet is communicated with the liquid inlet channel 11. The above-described dental irrigator has all the advantages of the above-described nozzle device for a dental irrigator, and will not be described herein again.

It should be noted that, in the implementation of the present invention, the nozzle device is connected to the tooth washing device body or the high pressure water pipe to form a jet flow with a proper angle, so that the application scene is very wide.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: compared with the prior art that only one flow limiting hole for acceleration is arranged, in the embodiment, the high-pressure pulse type fluid pumped by the power pump forms the pulse type vortex-shaped fluid under the action of the rotational flow structure by arranging the rotational flow structure, on one hand, the liquid outlet channel can spray out vortex-type turbulent flow, so that the cleaning force of the fluid is increased, and the cleaning effect on the oral cavity is further improved; on the other hand, the fluid can be in contact with the inner wall of the second shell more fully, so that the high-speed vortex-shaped fluid flowing out of the vortex structure is divided into a plurality of water columns through the liquid outlet channels to be sprayed out, the covering area of the fluid in the oral cavity can be increased, the cleaning area is enlarged, and the cleaning effect on the oral cavity is improved. Therefore, the nozzle device for the tooth washing device of the embodiment can solve the problem that the nozzle device for the tooth washing device in the prior art has poor oral cavity cleaning effect.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A nozzle device for a dental prophylaxis device, comprising:

a first housing (10);

the second shell (20) is connected with the first shell (10), and the second shell (20) limits a containing cavity (21) extending along a first preset axis and a plurality of liquid outlet channels (22) communicated with the containing cavity (21);

the cyclone structure (30) is arranged in the accommodating cavity (21), the cyclone structure (30) is provided with a fluid channel (31) extending along the first preset axis and a plurality of cyclone grooves (32) communicated with the fluid channel (31), the cyclone grooves (32) are arranged on the inner wall of the fluid channel (31) at intervals around the first preset axis, the cyclone grooves (32) penetrate through the cyclone structure (30) along the first preset axis, the inlet end of the fluid channel (31) is communicated with the inside of the first shell (10), the outlet end of the fluid channel (31) is communicated with the liquid outlet channel (22), the cyclone grooves (32) are configured to allow fluid in the cyclone grooves (32) to flow to the fluid channel (31) and form vortex-shaped fluid in the fluid channel (31), and the vortex-shaped fluid is sprayed out through the liquid outlet channel (22).

2. A nozzle device for a dental irrigator according to claim 1, wherein the fluid passage (31) is a tapered through-hole passing through the swirl structure (30) along a first predetermined axis, the tapered through-hole having an internal diameter which decreases from an inlet end of the fluid passage (31) to an outlet end of the fluid passage (31).

3. A nozzle device for a dental irrigator according to claim 1, wherein the swirl structure (30) comprises a base (33) and a cylindrical structure (34) provided on the base (33) and extending along a first predetermined axis, the cylindrical structure (34) being located on a side of the base (33) facing away from the first housing (10), the swirl groove (32) passing through the cylindrical structure (34) in a radial direction of the cylindrical structure (34) to enable fluid to be ejected from a peripheral side of the swirl structure (30).

4. Nozzle device for a dental rinser as claimed in claim 1, characterized in that said plurality of swirl slots (32) is arranged with central symmetry with respect to said first predetermined axis.

5. Nozzle device according to any of claims 1 to 4, wherein the central axis of at least one of the outlet channels (22) is angled with respect to the first predetermined axis such that the outlet channels (22) emit fluid at different angles.

6. The nozzle device for a dental irrigator according to any one of claims 1 to 4, wherein said first housing (10) delimits a liquid inlet channel (11) and a speed increasing channel (12) which are in communication and extend along said first predetermined axis, the internal diameter of said speed increasing channel (12) being smaller than the internal diameter of said liquid inlet channel (11), said speed increasing channel (12) and said housing chamber (21) being arranged in sequence along said first predetermined axis.

7. The nozzle device for the tooth cleaner as claimed in claim 6, further comprising a water blocking member (50) located in the accommodating chamber (21), wherein the water blocking member (50) is located between the swirling structure (30) and the first housing (10), a speed-increasing through hole (51) is formed in the water blocking member (50), the speed-increasing through hole (51) can communicate the speed-increasing channel (12) and the fluid channel (31), and an inner diameter of the speed-increasing through hole (51) is smaller than an inner diameter of the speed-increasing channel (12).

8. The nozzle device for a dental irrigator according to claim 7, wherein the ratio of the internal diameter of the speed-increasing through-hole (51) to the internal diameter of the speed-increasing channel (12) is greater than or equal to 0.22 and less than or equal to 0.275.

9. The nozzle device for the tooth washing machine as claimed in claim 6, wherein the speed increasing channel (12) comprises a reducing section (121), a straight hole section (122) and a reaming section (123) which are communicated in sequence, the inner diameter of the reducing section (121) is gradually reduced from the inlet of the speed increasing channel (12) to the outlet of the speed increasing channel (12), and the inner diameter of the reaming section (123) is gradually increased to form a Laval nozzle structure.

10. The nozzle device for a dental irrigator according to any one of claims 1 to 4, wherein said second housing (20) comprises:

the connecting cylinder section (23) is provided with a mounting through hole;

the liquid spraying structure (24) is a cylinder body with an opening at one end and a closed end at the other end, the opening end is connected with the first shell (10) through the connecting cylinder section (23), the inside of the cylinder body and the mounting through hole form the accommodating cavity (21), a plurality of spray holes are formed in the circumferential side wall and the bottom wall of the cylinder body, and the spray holes form the liquid outlet channel (22).

11. The nozzle device for the dental irrigator according to claim 10, wherein the cylinder body comprises a first cylinder section (241) and a second cylinder section (242) which are connected, one end of the second cylinder section (242) which is far away from the first cylinder section (241) is closed, the peripheral outer wall of the first cylinder section (241) is provided with a first external thread, the inner wall of the connecting cylinder section (23) is provided with a first internal thread, the first external thread is matched with the first internal thread, and the second cylinder section (242) is provided with the spray hole; alternatively, the first and second electrodes may be,

the circumference outer wall of first casing (10) is equipped with the second external screw thread, be equipped with the second internal thread on the inner wall of installation through-hole, the second external screw thread with the cooperation of second internal thread.

12. The nozzle device for a dental irrigator according to claim 6, wherein the ratio of the inner diameter of the liquid inlet channel (11) to the inner diameter of the speed-increasing channel (12) is greater than or equal to 1.5 and less than or equal to 1.6.

13. A dental rinser comprising a rinser body provided with a water outlet, and a nozzle device for a dental rinser according to any one of claims 1 to 12, wherein the first shell (10) is inserted at the water outlet and the water outlet is communicated with the inside of the first shell (10).

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