Nozzle structure and water flosser

Abstract

This utility model discloses a nozzle structure and a water flosser, comprising: a nozzle body having a water inlet channel, a water outlet channel, and an air inlet channel; the water inlet of the water inlet channel is connected to a water pump on the water flosser; the water outlet of the water inlet channel is connected to the water inlet of the water outlet channel; the cross-sectional area of ​​the water outlet channel is smaller than that of the water inlet channel to create a negative pressure within the water outlet channel; the cross-sectional area of ​​the water outlet channel is equal everywhere; the air inlet of the air inlet channel is connected to the outside; and the air outlet of the air inlet channel is connected to the water outlet channel, so that external gas is drawn into the water outlet channel through the air inlet channel under the negative pressure within the water outlet channel. This nozzle structure is simpler and easier to mold during manufacturing, reducing manufacturing difficulty and thus lowering costs, making it more conducive to the widespread application of this nozzle structure.

Description

Technical Field

[0001] This utility model relates to the field of oral irrigators, and in particular to a nozzle structure and an oral irrigator. Background Technology

[0002] As an auxiliary tool to toothbrushes, water flossers can clean areas that are difficult to reach with a toothbrush, such as between teeth and the gum line.

[0003] Chinese utility model patent CN116211516A discloses a venturi tube and a dental cleaning device, including a water inlet section, a constriction section, a throat, an expansion section, a water outlet section, and an air inlet section. These sections are arranged sequentially along the water outlet direction of the venturi tube. The air inlet section is connected to the throat. Water enters through the water inlet section, its flow rate increases and its pressure decreases after passing through the constriction section, and then passes through the throat and expansion section before exiting through the water outlet section. In the throat section, where the area is small, the velocity is high and the pressure is low, easily creating a negative pressure. Therefore, an air inlet section is designed at the throat. When a negative pressure is created in the throat, air can be drawn in through the air inlet of the air inlet section, forming a bubble-like rinsing solution with the liquid flowing in from the water inlet section. When this bubble-like rinsing solution reaches the teeth and gums, the force generated by the bursting of the bubbles effectively increases the cleaning effect without causing discomfort or damage to the oral cavity. However, the aforementioned venturi tube structure is complex, difficult to manufacture, and increases costs. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, this utility model provides a nozzle structure and a dental flosser.

[0005] This utility model is achieved through the following technical solution:

[0006] The nozzle structure includes:

[0007] The nozzle body has a water inlet channel, a water outlet channel, and an air inlet channel. The water inlet of the water inlet channel is connected to the water pump on the water flosser. The water outlet of the water inlet channel is connected to the water inlet of the water outlet channel. The water outlet of the water outlet channel is connected to the outside. The cross-sectional area of ​​the water outlet channel is smaller than that of the water inlet channel to create a negative pressure in the water outlet channel. The cross-sectional area of ​​the water outlet channel is equal everywhere. The air inlet of the air inlet channel is connected to the outside. The air outlet of the air inlet channel is connected to the water outlet channel so that external gas is drawn into the water outlet channel through the air inlet channel under the negative pressure in the water outlet channel.

[0008] The nozzle structure of this utility model features an inlet channel, an outlet channel, and an air intake channel on the nozzle body. Under the action of the water pump on the oral irrigator, the rinsing fluid in the water tank is pumped to the inlet of the inlet channel, and then sequentially passes through the inlet and outlet channels. Because the cross-sectional area of ​​the outlet channel is smaller than that of the inlet channel, the flow velocity of the rinsing fluid entering the outlet channel increases, causing the rinsing fluid in the outlet channel to quickly exit through its outlet. This creates a negative pressure in the outlet channel, drawing in external gas. The gas drawn into the outlet channel is continuously sheared and pressured by the high-speed rinsing fluid flowing towards the outlet, breaking it into small bubbles. These bubbles mix with the rinsing fluid to form a bubble rinsing fluid, which is finally ejected from the outlet of the outlet channel. Due to the smaller cross-sectional area of ​​the outlet channel... The uniform surface area allows the bubble rinsing fluid to maintain a high flow rate. Simultaneously, the bubbles in the rinsing fluid buffer the teeth and gums. Therefore, once the rinsing fluid reaches the teeth and gums, the high flow rate and the force generated by bubble bursts significantly enhance the cleaning effect without causing discomfort or damage to the oral cavity. This nozzle structure is simpler than existing technologies that require a gradually shrinking and then expanding structure on the nozzle body. It is easier to mold and form during manufacturing, reducing manufacturing difficulty and costs, and facilitating its widespread application.

[0009] In one embodiment, the nozzle body further has a gradient flow channel, the inlet of the gradient flow channel is connected to the outlet of the inlet flow channel, and the outlet of the gradient flow channel is connected to the inlet of the outlet flow channel. The cross-sectional area of ​​the gradient flow channel gradually decreases from its inlet to its outlet. The gradient flow channel can guide the flow, reduce the resistance of the flushing fluid flow, and smoothly guide the flushing fluid in the inlet flow channel to the outlet flow channel. At the same time, it can also increase the flushing fluid flow rate and increase the flushing fluid pressure, thereby increasing the flow rate and pressure of the flushing fluid entering the outlet flow channel, thereby improving the shearing effect on bubbles.

[0010] In one embodiment, the contraction angle A of the gradient flow channel is 30°-120°. The gradient flow channel within this contraction angle range can provide good guidance for the flushing fluid, thereby greatly reducing the resistance when the flushing fluid flows. At the same time, it allows the flushing fluid to enter the outlet flow channel at a higher flow rate, and the flushing fluid is quickly sprayed out through the outlet flow channel, making it easier to form negative pressure in the outlet flow channel.

[0011] In one embodiment, the cross-sectional area of ​​the air intake channel gradually decreases from its inlet to its outlet, that is, the cross-section of the air intake channel along its length is conical. The conical cross-section of the air intake channel is easy to realize through molds during manufacturing, which can greatly reduce the manufacturing difficulty and further reduce costs. At the same time, the conical cross-section of the air intake channel can improve the gas intake efficiency and increase the amount of gas in the rinsing liquid. The more gas dissolved in the rinsing liquid, the more obvious the effect of microbubble water and the better the rinsing effect.

[0012] In one embodiment, the cross-sectional area of ​​the air intake channel is equal everywhere, that is, the cross-section of the air intake channel along its length extension direction is conical. This air intake channel can also ensure that external gas can smoothly enter the water outlet channel.

[0013] In one embodiment, the cross-sectional area of ​​the air inlet channel is smaller than that of the water outlet channel to ensure that negative pressure is more easily formed in the water outlet channel, thereby ensuring that external gas can be drawn into the water outlet channel, while effectively preventing water in the water outlet channel from flowing to the outside through the air inlet channel.

[0014] In one embodiment, the air inlet channel is perpendicular to the water outlet channel. The air inlet channel being perpendicular to the water outlet channel can effectively prevent the flushing liquid in the water outlet channel from entering its interior, ensuring that external gas can smoothly enter the water outlet channel through the air inlet channel. At the same time, this air inlet channel has the shortest stroke, which can improve the efficiency of external gas entering the water outlet channel, increase the air intake, thereby increasing the bubble content in the bubble flushing liquid, which is conducive to further improving the flushing effect.

[0015] In one embodiment, the inlet channel and the outlet channel are arranged one by one along the length extension direction of the nozzle body, so that the flushing liquid flows along the length extension direction of the nozzle body, which can greatly reduce the flow resistance of the flushing liquid, make the flushing liquid flow more smoothly, reduce the pressure loss of the flushing liquid, and thus make it easier to form negative pressure in the outlet channel.

[0016] Water flossers, including:

[0017] The main body of the oral irrigator is equipped with a water tank and a water pump, and the water inlet of the water pump is connected to the water tank;

[0018] In the nozzle structure described above, the inlet of the water outlet channel is connected to the outlet of the water pump.

[0019] The oral irrigator of this invention, due to the above-mentioned nozzle structure, only requires the setting of an inlet channel, an outlet channel, and an air intake channel on the nozzle body. At the same time, the cross-sectional area of ​​the outlet channel is smaller than that of the inlet channel, and the cross-sectional area of ​​the outlet channel is set to be equal everywhere. Compared with the prior art, which requires setting a structure that gradually shrinks and then gradually expands on the nozzle body, this nozzle structure is simpler and easier to process and form using molds during manufacturing, reducing manufacturing difficulty, thereby reducing costs and making it more conducive to the promotion and application of oral irrigators.

[0020] In one embodiment, the outlet of the water pump is connected to an outlet pipe, and the outlet pipe is provided with a positioning part, which is arranged around the axial center line of the outlet pipe.

[0021] The nozzle body is provided with a plug-in part, which is inserted into the water outlet pipe. The nozzle body also has a positioning groove, which is provided on the plug-in part. The positioning groove cooperates with the positioning part to prevent the plug-in part from disengaging from the water outlet pipe and to ensure that the nozzle body and the water outlet pipe are reliably connected together.

[0022] In one embodiment, the nozzle body is further provided with a positioning protrusion located on the side near the insertion part. The positioning protrusion cooperates with the body of the water flosser body. Thus, when the insertion part is inserted into the water outlet pipe, the positioning protrusion and the body of the water flosser body can be used to identify that the insertion part has been installed in place, thereby playing an installation positioning role and ensuring that the insertion part is reliably connected to the water outlet pipe.

[0023] The beneficial effects of this utility model are:

[0024] The nozzle structure of this utility model features an inlet channel, an outlet channel, and an air intake channel on the nozzle body. Under the action of the water pump on the oral irrigator, the rinsing fluid in the water tank is pumped to the inlet of the inlet channel, and then sequentially passes through the inlet and outlet channels. Because the cross-sectional area of ​​the outlet channel is smaller than that of the inlet channel, the flow velocity of the rinsing fluid entering the outlet channel increases, causing the rinsing fluid in the outlet channel to quickly exit through its outlet. This creates a negative pressure in the outlet channel, drawing in external gas. The gas drawn into the outlet channel is continuously sheared and pressured by the high-speed rinsing fluid flowing towards the outlet, breaking it into small bubbles. These bubbles mix with the rinsing fluid to form a bubble rinsing fluid, which is finally ejected from the outlet of the outlet channel. Due to the smaller cross-sectional area of ​​the outlet channel... The uniform surface area allows the bubble rinsing fluid to maintain a high flow rate. Simultaneously, the bubbles in the rinsing fluid buffer the teeth and gums. Therefore, once the rinsing fluid reaches the teeth and gums, the high flow rate and the force generated by bubble bursts significantly enhance the cleaning effect without causing discomfort or damage to the oral cavity. This nozzle structure is simpler than existing technologies that require a gradually shrinking and then expanding structure on the nozzle body. It is easier to mold and form during manufacturing, reducing manufacturing difficulty and costs, and facilitating its widespread application. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the nozzle structure of this utility model;

[0026] Figure 2 This is a cross-sectional view of the nozzle structure of this utility model;

[0027] Figure 3 This is a partial structural schematic diagram of the nozzle structure of this utility model;

[0028] Figure 4 This is a partial structural schematic diagram of the nozzle structure of this utility model;

[0029] Figure 5 This is a schematic diagram of the water tank and water pump assembled together in the water flosser of this utility model.

[0030] Figure Labels

[0031] 1. Nozzle body; 11. Inlet channel; 12. Outlet channel; 13. Inlet air channel; 14. Gradient channel; 15. Connecting part; 16. Positioning groove; 17. Positioning protrusion; 2. Water tank; 3. Water pump; 4. Outlet pipe. Detailed Implementation

[0032] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and therefore may vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0033] Please see Figures 1-4 This illustration shows a nozzle structure according to a preferred embodiment of the present invention, comprising:

[0034] The nozzle body 1 has a water inlet channel 11, a water outlet channel 12, and an air inlet channel 13. The water inlet of the water inlet channel 11 is connected to the water pump 3 on the water flosser. The water outlet of the water inlet channel 11 is connected to the water inlet of the water outlet channel 12. The water outlet of the water outlet channel is connected to the outside. The cross-sectional area of ​​the water outlet channel 12 is smaller than that of the water inlet channel 11 to form a negative pressure in the water outlet channel 12. The cross-sectional area of ​​the water outlet channel 12 is equal everywhere. The air inlet of the air inlet channel 13 is connected to the outside. The air outlet of the air inlet channel 13 is connected to the water outlet channel 12 so that the outside air is drawn into the water outlet channel 12 through the air inlet channel 13 under the negative pressure in the water outlet channel 12.

[0035] The nozzle structure of this utility model has an inlet channel 11, an outlet channel 12, and an air intake channel 13 on the nozzle body 1. Under the action of the water pump 3 on the oral irrigator, the rinsing fluid in the oral irrigator water tank 2 is pumped to the inlet of the inlet channel 11, and then passes through the inlet channel 11 and the outlet channel 12 in sequence. Since the cross-sectional area of ​​the outlet channel 12 is smaller than that of the inlet channel 11, the flow velocity of the rinsing fluid entering the outlet channel 12 is increased, thus increasing the flow velocity of the outlet channel. The flushing fluid in channel 12 is rapidly ejected to the outside through its outlet, creating a negative pressure in the outlet channel 12. Under this negative pressure, outside gas is drawn into the outlet channel 12. The gas drawn into the outlet channel 12 is continuously sheared and pressured by the high-speed flushing fluid flowing in the direction of water outlet, breaking it into small bubbles. These bubbles mix with the flushing fluid to form a bubble flushing fluid, which is ultimately ejected from the outlet of the outlet channel 12. Because the cross-sectional area of ​​the water outlet channel 12 is equal everywhere, the bubble rinsing liquid can maintain a high flow rate. At the same time, the bubbles in the bubble rinsing liquid can also buffer the teeth and gums. Therefore, after the bubble rinsing liquid reaches the teeth and gums, the high flow rate of the bubble rinsing liquid and the force generated by the bursting of the bubbles can greatly increase the cleaning effect without causing discomfort or damage to the oral cavity. In particular, since it is only necessary to set the water inlet channel 11, the water outlet channel 12 and the air inlet channel 13 on the nozzle body 1, and make the cross-sectional area of ​​the water outlet channel 12 smaller than the cross-sectional area of ​​the water inlet channel 11 and make the cross-sectional area of ​​the water outlet channel 12 equal everywhere, compared with the existing technology that requires setting a structure that gradually shrinks and then gradually expands on the nozzle body 1, this nozzle structure is simpler, easier to process and form by mold during manufacturing, reduces manufacturing difficulty, thereby reducing costs and making it more conducive to the promotion and application of this nozzle structure.

[0036] See Figures 2-4 In one embodiment, the nozzle body 1 further has a gradient flow channel 14, the inlet of the gradient flow channel 14 is connected to the outlet of the inlet flow channel 11, and the outlet of the gradient flow channel 14 is connected to the inlet of the outlet flow channel 12. The cross-sectional area of ​​the gradient flow channel 14 gradually decreases from its inlet to its outlet. The gradient flow channel 14 can play a guiding role, reduce the resistance when the flushing fluid flows, and smoothly guide the flushing fluid in the inlet flow channel 11 to the outlet flow channel 12. At the same time, it can also increase the flow rate and pressure of the flushing fluid, increase the flow rate and pressure of the flushing fluid entering the outlet flow channel 12, thereby improving the shearing effect on the bubbles.

[0037] See Figures 3-4In one embodiment, the contraction angle A of the gradient flow channel 14 is 30°-120°. The gradient flow channel 14 within this contraction angle range can play a good guiding effect on the flushing liquid, thereby greatly reducing the resistance when the flushing liquid flows. At the same time, it allows the flushing liquid to enter the outlet flow channel 12 at a higher flow rate, so that the flushing liquid can be sprayed out quickly through the outlet flow channel 12, making it easier to form negative pressure in the outlet flow channel 12.

[0038] See Figure 3 In one embodiment, the cross-sectional area of ​​the air intake channel 13 gradually decreases from its inlet to its outlet, that is, the cross-section of the air intake channel 13 along its length is conical. The conical cross-section of the air intake channel 13 is easy to realize by mold during manufacturing, which can greatly reduce the manufacturing difficulty and further reduce costs. At the same time, the conical cross-section of the air intake channel 13 can improve the gas intake efficiency and increase the amount of gas in the rinsing liquid. The more gas dissolved in the rinsing liquid, the more obvious the effect of microbubble water and the better the rinsing effect.

[0039] See Figure 4 In one embodiment, the cross-sectional area of ​​the air intake channel 13 is equal everywhere, that is, the cross-section of the air intake channel 13 along its length extension direction is conical. This air intake channel 13 can also ensure that external gas can smoothly enter the water outlet channel 12.

[0040] In one embodiment, the cross-sectional area of ​​the air inlet channel 13 is smaller than that of the water outlet channel 12 to ensure that a negative pressure is more easily formed in the water outlet channel 12, thereby ensuring that external gas can be drawn into the water outlet channel 12. At the same time, it can effectively prevent the water in the water outlet channel 12 from flowing to the outside through the air inlet channel 13.

[0041] In one embodiment, the air inlet channel 13 is perpendicular to the water outlet channel 12. The air inlet channel 13, which is perpendicular to the water outlet channel 12, can effectively prevent the flushing liquid in the water outlet channel 12 from entering its interior, ensuring that external gas can smoothly enter the water outlet channel 12 through the air inlet channel 13. At the same time, this air inlet channel 13 has the shortest stroke, which can improve the efficiency of external gas entering the water outlet channel 12, increase the air intake, thereby increasing the bubble content in the bubble flushing liquid, which is conducive to further improving the flushing effect.

[0042] In other embodiments, the air inlet channel 13 may be inclined relative to the water outlet channel 12.

[0043] In one embodiment, the inlet channel 11 and the outlet channel 12 are arranged one by one along the length extension direction of the nozzle body 1, so that the flushing liquid flows along the length extension direction of the nozzle body 1, which can greatly reduce the flow resistance of the flushing liquid, make the flushing liquid flow more smoothly, reduce the pressure loss of the flushing liquid, and thus make it easier to form negative pressure in the outlet channel 12.

[0044] See Figure 5 A preferred embodiment of this utility model also provides a dental flosser, comprising:

[0045] The main body of the oral irrigator is equipped with a water tank 2 and a water pump 3, and the water inlet of the water pump 3 is connected to the water tank 2.

[0046] In the nozzle structure described above, the inlet of the water outlet channel 12 is connected to the outlet of the water pump 3.

[0047] The oral irrigator of this utility model, due to the adoption of the above-mentioned nozzle structure, only requires the setting of an inlet channel 11, an outlet channel 12 and an air inlet channel 13 on the nozzle body 1. At the same time, the cross-sectional area of ​​the outlet channel 12 is made smaller than the cross-sectional area of ​​the inlet channel 11 and the cross-sectional area of ​​the outlet channel 12 is made equal everywhere. Compared with the prior art, which requires setting a structure that gradually shrinks and then gradually expands on the nozzle body 1, this nozzle structure is simpler and easier to process and form by mold during manufacturing, reducing manufacturing difficulty, thereby reducing costs and making it more conducive to the promotion and application of oral irrigators.

[0048] See Figure 5 In one embodiment, the outlet of the water pump 3 is connected to the outlet pipe 4, and the outlet pipe 4 is provided with a positioning part, which is arranged around the axial center line of the outlet pipe 4.

[0049] The nozzle body 1 is provided with a plug part 15, which is inserted into the water outlet pipe 4. The nozzle body 1 also has a positioning groove 16, which is provided on the plug part 15. The positioning groove 16 cooperates with the positioning part to restrict the plug part 15 from disengaging from the water outlet pipe 4, and ensure that the nozzle body 1 and the water outlet pipe 4 are reliably connected together.

[0050] In one embodiment, a sealing ring is sandwiched between the plug portion 15 and the water outlet pipe 4. This allows the sealing ring to fit tightly against the outer peripheral wall of the plug portion 15 and the inner wall of the water outlet pipe 4, thereby reliably sealing the gap between the plug portion 15 and the water outlet pipe 4 and preventing water leakage. At the same time, it can also improve the connection stability between the plug portion 15 and the water outlet pipe 4.

[0051] In one embodiment, the nozzle body 1 is further provided with a positioning protrusion 17, which is located on the side near the insertion part 15. The positioning protrusion 17 cooperates with the body of the water flosser body. Thus, during the process of inserting the insertion part 15 into the water outlet pipe 4, the insertion part 15 can be identified as being installed in place by the cooperation of the positioning protrusion 17 with the body of the water flosser body, which plays a role in installation and positioning, and ensures that the insertion part 15 is reliably connected to the water outlet pipe 4.

[0052] This utility model is not limited to the above-described embodiments. If any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.

Claims

1. A nozzle structure, characterized in that, include: The nozzle body (1) has a water inlet channel (11), a water outlet channel (12), and an air inlet channel (13). The water inlet of the water inlet channel (11) is connected to the water pump (3) on the water flosser. The water outlet of the water inlet channel (11) is connected to the water inlet of the water outlet channel (12). The water outlet of the water outlet channel (12) is connected to the outside. The cross-sectional area of ​​the water outlet channel (12) is smaller than that of the water inlet channel (13). The cross-sectional area of ​​the flow channel (11) is such that a negative pressure is formed in the water outlet flow channel (12). The cross-sectional area of ​​the water outlet flow channel (12) is equal everywhere. The air inlet of the air inlet flow channel (13) is connected to the outside. The air outlet of the air inlet flow channel (13) is connected to the water outlet flow channel (12) so that external gas is drawn into the water outlet flow channel (12) through the air inlet flow channel (13) under the negative pressure in the water outlet flow channel (12).

2. The nozzle structure according to claim 1, characterized in that, The nozzle body (1) also has a gradient flow channel (14), the inlet of the gradient flow channel (14) is connected to the outlet of the inlet flow channel (11), the outlet of the gradient flow channel (14) is connected to the inlet of the outlet flow channel (12), and the cross-sectional area of ​​the gradient flow channel (14) gradually decreases from its inlet to its outlet.

3. The nozzle structure according to claim 2, characterized in that, The contraction angle A of the gradient flow channel (14) is 30°-120°.

4. The nozzle structure according to claim 1, characterized in that, The cross-sectional area of ​​the air intake channel (13) gradually decreases from its inlet toward its outlet.

5. The nozzle structure according to claim 1, characterized in that, The cross-sectional area of ​​the air intake channel (13) is equal everywhere.

6. The nozzle structure according to claim 1, characterized in that, The cross-sectional area of ​​the air intake channel (13) is smaller than the cross-sectional area of ​​the water outlet channel (12).

7. The nozzle structure according to claim 1, characterized in that, The inlet channel (11) and the outlet channel (12) are arranged one by one along the length extension direction of the nozzle body (1).

8. A dental flosser, characterized in that, include: The main body of the oral irrigator is equipped with a water tank (2) and a water pump (3), and the inlet of the water pump (3) is connected to the water tank (2); According to any one of claims 1-7, the inlet of the water outlet channel (12) is connected to the outlet of the water pump (3).

9. The oral irrigator according to claim 8, characterized in that, The outlet of the water pump (3) is connected to the outlet pipe (4), and the outlet pipe (4) is provided with a positioning part, which is arranged around the axial center line of the outlet pipe (4). The nozzle body (1) is provided with a plug-in part (15), which is inserted into the water outlet pipe (4). The nozzle body (1) also has a positioning groove (16), which is provided on the plug-in part (15) and cooperates with the positioning part.

10. The oral irrigator according to claim 9, characterized in that, The nozzle body (1) is also provided with a positioning protrusion (17), which is located on the side near the insertion part (15) and cooperates with the body of the water flosser.

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