Nozzle for oral irrigator and oral irrigator

Abstract

A fluid channel is arranged in the nozzle, a fluid outlet is formed in one end of the fluid channel, the fluid outlet is communicated with the fluid channel, a plurality of flow channels are formed in the inner wall face of the fluid channel at least close to the fluid outlet, and the flow channels are communicated with the fluid channel. The multiple flow channels are arranged in the circumferential direction of the fluid outlet at intervals and extend in the length direction of the nozzle in a bent mode. According to the nozzle for the oral irrigator, a plurality of bent and extending flow channels are formed in the nozzle, water flow is diffused in a vortex mode, flushing is more comfortable, and the soft and powerful cleaning effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of oral hygiene technology, and in particular to a nozzle for a water flosser and a water flosser. Background Technology

[0002] A water flosser is a common oral hygiene device that uses water to rinse teeth, helping to maintain gum health. Most conventional water flossers are controlled by a water pump and nozzle; the nozzle sprays water to impact the teeth and oral cavity surfaces. Users manually aim the nozzle at their teeth to ensure the water stream effectively cleans the mouth.

[0003] Among related technologies, water flossers feature a focused pulsed water flow with strong impact, making them suitable for cleaning stubborn food debris. However, they are less comfortable for beginners and users with sensitive gums, and can easily cause damage to the oral cavity. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a nozzle for a water flosser, wherein multiple curved and extending flow channels are formed inside the nozzle, the water flow vortexes and disperses, making rinsing more comfortable and achieving a gentle yet powerful cleaning effect.

[0005] Another objective of this invention is to provide a dental flosser employing the aforementioned nozzle.

[0006] According to an embodiment of the present invention, a nozzle for a water flosser has a fluid channel inside, a fluid outlet is formed at one end of the fluid channel, the fluid outlet is connected to the fluid channel, and a plurality of flow channels are formed on the inner wall surface of the fluid channel at least near the fluid outlet. The plurality of flow channels are arranged at circumferential intervals along the fluid outlet, and the flow channels extend and bend along the length direction of the nozzle.

[0007] According to the nozzle of this utility model for a water flosser, the nozzle has multiple curved and extending flow channels, which are directly formed on the inner wall of the fluid channel. This reduces the manufacturing difficulty of the nozzle, thereby improving production efficiency and reducing production costs. The curved and extending flow channels create a rotating vortex when the fluid is ejected from the water flosser, and the water flow disperses in the vortex, effectively improving gentleness and making rinsing more comfortable. Moreover, the vortex-dispersed water flow can effectively reduce the focused impact force of the water flow, thereby reducing water irritation to the oral cavity and improving the performance of the water flosser. In addition, while reducing impact force, the vortex water flow can also reach deep into hard-to-clean areas such as gaps between teeth and gingival sulcus, effectively improving the cleaning effect of the water flosser.

[0008] According to some embodiments of the present invention, the nozzle includes: a body on which a first fluid channel is formed; a nozzle connected to one end of the body along its length, the nozzle having a second fluid channel formed thereon, the second fluid channel communicating with the first fluid channel to form the fluid channel, a fluid outlet formed at one end of the nozzle away from the body, and a flow path formed on the second fluid channel.

[0009] According to some embodiments of the present invention, the flow channel penetrates the end face of the nozzle that is away from the body.

[0010] According to some embodiments of the present invention, the second fluid channel includes: a first sub-fluid channel, one end of the body being fitted into the first sub-fluid channel; and a second sub-fluid channel, the second sub-fluid channel and the first sub-fluid channel being arranged along the extension direction of the nozzle, the flow channel being formed on the second sub-fluid channel.

[0011] According to some embodiments of the present invention, the inner circumferential area of ​​the second sub-fluid passage gradually decreases along the direction of the body toward the nozzle; and / or, the cross-sectional area of ​​the first sub-fluid channel is greater than the cross-sectional area of ​​the second sub-fluid channel, a stepped portion is constructed between the first sub-fluid channel and the second sub-fluid channel, and the end face of the body contacts the stepped portion.

[0012] According to some embodiments of the present invention, one end of the flow channel is connected to the first fluid channel, and the other end of the flow channel extends circumferentially along the second sub-fluid channel toward the side where the fluid outlet is located.

[0013] According to some embodiments of the present invention, the cross-sectional area of ​​the first fluid channel located in the first sub-fluid channel along the direction of the body toward the nozzle first gradually decreases and then gradually increases.

[0014] According to some embodiments of the present invention, a first connecting line is formed between one end of the flow channel and the other end of the flow channel, and the angle between the first connecting line and the axis of the second fluid channel is α, wherein α satisfies: 5.2°≤α≤6.4°.

[0015] According to some embodiments of the present invention, the width of the flow channel is W, wherein W satisfies: 0.4mm≤W≤0.5mm; and / or, the depth of the flow channel is H, wherein H satisfies: 3.2mm≤H≤4.0mm.

[0016] A water flosser according to a second aspect of the present invention includes a nozzle for a water flosser as described in the first aspect of the present invention.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of a nozzle according to an embodiment of the present utility model;

[0020] Figure 2 yes Figure 1 A cross-sectional view along line AA;

[0021] Figure 3 yes Figure 2 Enlarged view of section D shown in the center circle;

[0022] Figure 4 This is a schematic diagram of a nozzle according to an embodiment of the present invention;

[0023] Figure 5 yes Figure 4 A cross-sectional view along line BB.

[0024] Figure label:

[0025] 100. Nozzle;

[0026] 1. Fluid channel; 12. Fluid outlet; 121. Flow path; 122. First connecting line;

[0027] 2. Body; 21. First fluid channel;

[0028] 3. Nozzle; 31. Second fluid channel; 311. First sub-fluid channel;

[0029] 312. Second sub-fluid channel; 32. Step section. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-5 Description of a nozzle 100 for a water flosser according to an embodiment of the present invention.

[0031] Combination Figure 2 and Figure 3 According to the first aspect of the present invention, a nozzle 100 for a water flosser has a fluid channel 1 inside, and a fluid outlet 12 is formed at one end of the fluid channel 1, and the fluid outlet 12 is connected to the fluid channel 1.

[0032] For example, refer to Figure 2 The nozzle 100 is provided with a fluid channel 1, and the nozzle 100 along the... Figure 3 A fluid outlet 12 is formed on the upper end face shown and communicates with the fluid channel 1. Thus, fluid such as clean water flowing from the water tank of the oral irrigator to the nozzle 100 can flow along the fluid channel 1 to the fluid outlet 12 and be sprayed from the fluid outlet 12 to the area in the user's mouth that needs to be cleaned.

[0033] Combination Figure 5 The fluid channel 1 has a plurality of flow channels 121 formed on its inner wall surface at least near the fluid outlet 12, and the plurality of flow channels 121 are arranged at intervals along the circumference of the fluid outlet 12. In the description of this utility model, "plural" means two or more.

[0034] For example, in Figure 5 In the example, multiple flow channels 121 are formed adjacent to the fluid outlet 12 in the extending direction of the fluid channel 1. For example. Figure 5 The example shows six channels 121, which are arranged circumferentially at intervals along the fluid outlet 12. With this arrangement, when the nozzle 3 is used with the water flosser, on the one hand, the multiple channels 121 arranged at intervals allow water to be sprayed evenly from multiple points at the fluid outlet 12, enabling effective cleaning of multiple areas of the oral cavity and reducing blind spots. Furthermore, the water jets from the multiple channels 121 work together to create multi-angle impact forces in the oral cavity, enhancing the cleaning effect on hard-to-reach areas such as between teeth. On the other hand, the spaced arrangement of the channels 121 disperses the water flow from the nozzle 100, creating a vortex-like dispersion that avoids concentrated impact and pressure on any one area of ​​the oral cavity, reducing excessive stimulation and damage to sensitive areas. This allows the water flosser to better protect oral health while cleaning the mouth, improving the user experience.

[0035] Furthermore, the spaced arrangement of the flow channels 121 ensures that the water jets from each channel maintain a suitable distance and angle, preventing mutual interference and maintaining a relatively stable flow state. This allows the water to precisely reach the areas requiring cleaning, effectively improving the cleaning effect of the water flosser. It should be noted that the number and arrangement of the multiple flow channels 121 can be customized to better meet specific application needs. Additionally, since the multiple flow channels 121 are directly formed on the inner wall of the fluid channel 1, there is no need to install diffuser components or other parts at the nozzle 100 to alter the water jet state. This allows the water jet from the fluid outlet 12 to vortex and disperse, effectively improving gentleness and making rinsing more comfortable. While ensuring the cleaning effect of the nozzle 100, this also reduces the number of internal components used in the nozzle 100, lowering the manufacturing difficulty and thus improving production efficiency and reducing the production cost of the nozzle 100. Furthermore, the water jet ejected from the fluid outlet 12 maintains a pulse-like flow at its center, combining with the surrounding vortex flow to achieve gentleness while ensuring cleaning effectiveness, further enhancing the performance of the nozzle 100. When the nozzle 100 is used in a water flosser, it reduces the difficulty of production and assembly, facilitates the integration of internal components, promotes miniaturization, and thus improves the portability and comfort of the water flosser.

[0036] Combination Figure 2 The flow channel 121 is along the length direction of the nozzle 100 (i.e., Figure 2 (The direction indicated by the middle arrow C) curves and extends. For example, refer to... Figure 3 The flow channel 121 extends along the length of the nozzle 100 toward the fluid outlet 12, and bends around the central axis of the fluid channel 1 (e.g., bends in a thread-like shape or is slightly bent) along the length of the nozzle 100. The multiple flow channels 121 have the same inclination direction. The flow channel 121 can be a groove extending in a bend on the inner wall surface of the fluid channel 1, but is not limited to this.

[0037] Therefore, when the nozzle 3 is used with the water flosser, the multiple curved and extended flow channels 121 cause the water jet from the water flosser to present a rotating vortex shape, thus realizing the vortex gentle water flow technology. This vortex gentle water flow technology causes the fluid to rotate within the fluid channel 1, effectively reducing the focused impact force of the water flow and minimizing irritation to the oral cavity, thereby improving the performance of the water flosser. Furthermore, it is suitable for people with sensitive gums, beginners, or those experiencing tooth sensitivity during braces replacement, expanding the applicable population of the water flosser and further enhancing its performance. In addition, although the vortex fluid is relatively gentle, it can penetrate deep into hard-to-clean areas such as between teeth and the gingival sulcus, resulting in high cleaning efficiency. Moreover, during oral cleaning, the vortex fluid can massage the gums, promoting blood circulation and further benefiting gum health.

[0038] According to the nozzle 100 of the oral irrigator of this invention, the nozzle 100 is provided with multiple curved and extending flow channels 121, which are directly formed on the inner wall surface of the fluid channel 1. This reduces the manufacturing difficulty of the nozzle 100, thereby improving production efficiency and reducing the production cost of the nozzle 100. The curved and extending flow channels 121 cause the fluid ejected from the nozzle 100 to form a rotating vortex shape, and the water flow vortexes disperse, effectively improving gentleness and making rinsing more comfortable. Moreover, the vortex-dispersed water flow can effectively reduce the focused impact force of the water flow, thereby reducing the irritation of the water flow to the oral cavity and improving the performance of the nozzle 100. In addition, while reducing the impact force, the vortex water flow can also reach deep into hard-to-clean areas such as tooth gaps and gingival sulci, effectively improving the cleaning effect of the oral irrigator.

[0039] According to some embodiments of this utility model, combined with Figure 2 and Figure 3 The nozzle 100 includes a body 2 and a nozzle head 3. Specifically, a first fluid channel 21 is formed on the body 2. The nozzle head 3 is connected to one end of the body 2 along its length, and a second fluid channel 31 is formed on the nozzle head 3. The second fluid channel 31 and the first fluid channel 21 are connected to form a fluid channel 1. A fluid outlet 12 is formed at the end of the nozzle head 3 away from the body 2, and a flow channel 121 is formed on the second fluid channel 31.

[0040] For example, combining Figure 2 and Figure 3 The extension direction of the first fluid channel 21 is consistent with the extension direction of the body 2. For example, in Figure 3 In the example, the first fluid channel 21 first extends vertically along the height direction of the nozzle 100, and then to the left (i.e., Figure 3 The nozzle 100 extends obliquely in the direction indicated by the middle arrow (left-right direction), and the oblique direction is set at an acute angle to the central axis of the nozzle 100 in the height direction, so as to allow the nozzle 100 to reach into the user's cavity to clean the gums and gaps between teeth. Furthermore, a second fluid channel 31 is formed on the nozzle 3, and the lower end of the second fluid channel 31 is connected to the upper end of the first fluid channel 21, forming a complete fluid channel 1. In addition, the nozzle 3 and the body 2 are two detachably connected (e.g., threaded connection) components, and the nozzle 3 and the body 2 can be disassembled for easy installation of the nozzle 100 and replacement or maintenance of the nozzle 3. Optionally, the nozzle 3 can be configured as a cylindrical structure, with the shape and diameter of the upper end face of the body 2 matching the shape and diameter of the lower end face of the nozzle 3. Furthermore, refer to... Figure 2 and Figure 3The fluid outlet 12 is formed on the upper end face of the nozzle 3, which is suitable for precisely guiding the pressurized water flow inside the oral irrigator to various parts of the oral cavity, such as the gaps between teeth, gingival sulcus, and molars, which are difficult to clean, to rinse away food debris, plaque, and dental calculus. Optionally, the fluid outlet 12 can be set as a circle. The circular fluid outlet 12 allows the water flow to be sprayed into the oral cavity in a more concentrated manner, and the strength and impact of the water jet are relatively greater, which can deeply clean the gaps between teeth and gingival sulcus. Moreover, the circular fluid outlet 12 has a more regular structure, which can reduce the difficulty of manufacturing the nozzle 3 while improving the cleaning effect of the nozzle 100.

[0041] Furthermore, the flow channel 121 is formed on the inner wall surface of the second fluid channel 31, and the flow channel 121 extends spirally upward along the inner wall surface of the second fluid channel 31. The upper outlets of multiple flow channels 121 are arranged circumferentially along the fluid outlet 12. Thus, the fluid ejected along the nozzle 3 is composed of both vortex fluid and direct flow fluid, effectively improving the fluid's smoothness and enhancing the comprehensiveness of the cleaning effect of the nozzle 100 of the water flosser, thereby improving the cleaning effect of the nozzle 100 and the user's comfort. In addition, the flow channel 121 is only formed on the nozzle 3, reducing the area occupied by the flow channel 121 inside the nozzle 100, reducing the manufacturing difficulty, and the body 2 can be set to a more conventional structure so that the body 2 can be adapted to different nozzles 3, which also reduces the manufacturing difficulty of the body 2, thereby further reducing the manufacturing difficulty of the nozzle 100. In addition, the separate design of the nozzle 3 and the body 2 can improve the machining accuracy of the nozzle 3 and the body 2, improve the quality of the nozzle 100, and thus help the nozzle 100 to be used stably for a long time and extend its service life.

[0042] Combination Figure 3 Optionally, the upper end of the fluid channel 1 is curved at a certain angle along the length of the nozzle 100. This curvature is adapted to different areas inside the human oral cavity, such as gaps between teeth, gingival sulcus, and molars. On one hand, the curved design of the fluid channel 1 accurately guides water flow to all parts of the oral cavity, achieving comprehensive cleaning, avoiding blind spots, and improving the performance of the nozzle 100. On the other hand, it also guides the fluid to flow smoothly, allowing water to be sprayed from the nozzle 100 at appropriate pressure and velocity, thereby achieving a good oral cleaning effect.

[0043] According to some embodiments of this utility model, combined with Figure 2 and Figure 3 The flow channel 121 penetrates the end face of the nozzle 3 away from the body 2. For example, refer to... Figure 2 and Figure 3The flow channel 121 penetrates the upper end face of the nozzle 3, meaning the flow channel 121 is designed as a cavity structure. Therefore, the water flow passage within the flow channel 121 is relatively large, and the water can be sprayed directly from the upper end face of the nozzle 3 along the extension direction of the flow channel 121, resulting in lower flow resistance and smoother water spraying along the nozzle 100. Furthermore, it prevents impurities in the fluid, toothpaste residue, etc., from clogging the nozzle 3, effectively reducing the risk of clogging and extending the service life of the nozzle 3. In addition, it effectively reduces the weight of the nozzle 3, resulting in a lighter overall weight for the oral irrigator, thereby improving its convenience and user comfort.

[0044] According to some embodiments of this utility model, combined with Figures 1-5 The second fluid channel 31 includes a first sub-fluid channel 311 and a second sub-fluid channel 312. Specifically, one end of the body 2 is fitted into the first sub-fluid channel 311. The second sub-fluid channel 312 and the first sub-fluid channel 311 are arranged along the extension direction of the nozzle 3, and the flow channel 121 is formed on the second sub-fluid channel 312.

[0045] For example, refer to Figure 5 The second fluid channel 31 is composed of a first sub-fluid channel 311 and a second sub-fluid channel 312. The first sub-fluid channel 311 is formed in the lower part of the nozzle 100, and the upper part of the body 2 is adapted to be inserted into the first sub-fluid channel 311, thus forming a fluid channel 1 that connects the nozzle 100 and the body 2 vertically. Therefore, the upper part of the body 2 is spirally inserted into the first sub-fluid channel 311, which provides installation space for the upper part of the body 2, making reasonable use of the internal space of the second fluid channel 31, reducing the assembly difficulty of the nozzle 100, and improving the production efficiency of the nozzle 100. Furthermore, when the nozzle 3 needs to be replaced, it can be easily unscrewed from the insertion point, effectively extending the service life of the nozzle 100. As can be seen, the second fluid channel 31 is composed of a first sub-fluid channel 311 and a second sub-fluid channel 312 with different functions. This facilitates the detachable connection between the nozzle 3 and the body 2, improving connection stability while ensuring that the water flowing out through the second sub-fluid channel 312 forms a vortex flow. Furthermore, the fluid transported from bottom to top along the fluid channel 1 to the nozzle 100 can smoothly pass through the second fluid channel 31 and reach the fluid outlet 12 at the upper end face of the nozzle 100, effectively improving the cleaning consistency and stability of the nozzle 100, thereby enhancing its performance. In addition, for orthodontic users with braces, the fluid spraying from the top of the nozzle 100 more easily bypasses brackets and wires, directly cleaning between teeth and along the gum line, improving cleaning effectiveness and expanding the application range of the nozzle 100.

[0046] According to some embodiments of this utility model, combined with Figure 5 The inner circumferential area of ​​the second sub-fluid channel 312 gradually decreases along the direction from the body 2 toward the nozzle 3.

[0047] For example, in Figure 5 In the example, along the tilt direction of the nozzle 3, the cross-sectional area of ​​the second sub-fluid channel 312 gradually decreases from bottom to top. According to the principles of fluid mechanics, when fluid flows in a pipe, a decrease in cross-sectional area leads to an increase in fluid velocity. Therefore, the gradual decrease in the cross-sectional area of ​​the second sub-fluid channel 312 increases the flow velocity of water flowing through it, thereby enhancing the impact force of the water jet on the teeth and gums, and improving the cleaning power of the nozzle 100 on the tooth surface. In addition, the smaller fluid outlet 12 allows the ejected fluid to be more concentrated, forming a fine but powerful fluid column, making it easier and more precise for users to target various parts of the oral cavity, including hard-to-clean areas such as between teeth and gingival sulcus, when using the water flosser, thus achieving a more comprehensive and precise cleaning effect and helping to improve the cleaning effect of the nozzle 100. Furthermore, the smaller fluid outlet 12 can better adapt to the complex structure and confined space inside the oral cavity. For example, it can more easily reach hard-to-reach areas such as the retromolar region and around wisdom teeth for cleaning, improving the convenience and comfort of using the nozzle 100 and enhancing the comprehensiveness of its cleaning effect. Moreover, the aforementioned arrangement of the fluid channel 1 allows the nozzle 100 to maintain a certain pressure while improving the gentleness of the ejected fluid, thereby enhancing the comprehensiveness and comfort of the nozzle 100's cleaning effect.

[0048] According to some embodiments of this utility model, combined with Figure 5 The cross-sectional area of ​​the first sub-fluid channel 311 is larger than that of the second sub-fluid channel 312. A step portion 32 is constructed between the first sub-fluid channel 311 and the second sub-fluid channel 312. One end face of the body 2 is in contact with the step portion 32.

[0049] For example, combining Figure 5 The first sub-fluid channel 311 and the second sub-fluid channel 312 are connected along the extending direction of the nozzle 3, with the first sub-fluid channel 311 located at the lower end of the second sub-fluid channel 312. For example, in Figure 5In the example, at the connection between the first sub-fluid channel 311 and the second sub-fluid channel 312, the cross-sectional area of ​​the second sub-fluid channel 312 becomes smaller, thus constructing a step portion 32 facing upwards in the height direction of the nozzle 100. The presence of the step portion 32 provides a clear positioning reference for the body 2. When the nozzle 3 and the body 2 are assembled, the relative positions of the first sub-fluid channel 311 and the second sub-fluid channel 312 can be accurately defined, avoiding assembly deviations and thus improving the assembly accuracy and consistency of the nozzle 100. In addition, the larger cross-sectional area of ​​the first sub-fluid channel 311 increases the internal space of the first sub-fluid channel 311, which is beneficial for the body 2 to be quickly installed in the first sub-fluid channel 311 with high positioning accuracy. Moreover, the step portion 32 can also restrict the degree of freedom of movement of the nozzle 3 and the body 2 after assembly, preventing the nozzle 3 from being misaligned and ensuring the performance of the nozzle 100. For example, when the nozzle 100 is subjected to external impact or vibration during use, the step portion 32 can effectively constrain the position of the nozzle 3, maintaining the integrity and stability of the nozzle 100 assembly structure. In addition, the stepped portion 32 can improve the overall strength of the connection between the first sub-fluid channel 311 and the second sub-fluid channel 312, disperse the stress generated by the flow pressure and impact force at the connection, avoid stress concentration at a certain point or local area, thereby reducing the risk of damage to the nozzle 3 and extending the service life of the nozzle 3.

[0050] According to some embodiments of this utility model, combined with Figure 2 and Figure 3 One end of the flow channel 121 is connected to the first fluid channel 21, and the other end of the flow channel 121 extends circumferentially along the second sub-fluid channel 312 toward the side where the fluid outlet 12 is located.

[0051] For example, refer to Figure 2 and Figure 3 The lower end of the flow channel 121 is connected to the first fluid channel 21, thereby dispersing the water flow in the first fluid channel 21 into multiple flow channels 121. These multiple flow channels 121 extend circumferentially along the inner wall of the second sub-fluid channel 312, for example, in a spiral shape, thus forming multiple cooperating vortex water flows. In other words, the fluid ejected from the nozzle 100 is a composite fluid combining vortex and direct current fluid, effectively improving the comprehensiveness of the nozzle 100's cleaning effect. Therefore, the composite fluid combining vortex and direct current water flows in the second fluid channel 31 makes the water flow ejected from the nozzle 100 gentler and has a certain pressure, thereby effectively improving the cleaning effect of the nozzle 100. Furthermore, the dispersed water flow can cover a wider area in the oral cavity, such as the gum line and interdental spaces, expanding the cleaning range of the nozzle 100. For example, in Figure 4In the example, the upper end face of the second sub-fluid channel 312, i.e., the fluid outlet 12, is circular, while the upper outlets of the flow channel 121 are evenly spaced along the circumference of the fluid outlet 12. This reduces the manufacturing difficulty of the nozzle 100 and improves its production efficiency. Furthermore, the evenly spaced outlets on the upper end face of the flow channel 121 minimize interference between water flows from different flow channels 121, resulting in more uniform and stable water flow velocity and flow rate. This effectively improves the uniformity and consistency of the water flow sprayed along the nozzle 100, enhancing its cleaning effect and expanding its cleaning area. Moreover, it allows water to be sprayed at different angles, better adapting to the shape and position of teeth in different parts of the oral cavity. For example, it makes it easier to clean the sides of molars and the gaps between front teeth, further improving the cleaning effect of the nozzle 100.

[0052] According to some embodiments of this utility model, combined with Figure 2 and Figure 3 The cross-sectional area of ​​the first fluid channel 21 located in the first sub-fluid channel 311 along the direction of the body 2 toward the nozzle 3 gradually decreases and then gradually increases.

[0053] For example, refer to Figure 3 Along the extension direction of the nozzle 100, the cross-sectional area of ​​the portion of the first fluid channel 21 near the nozzle 3 gradually decreases and then gradually increases from bottom to top. This arrangement results in a gradually decreasing cross-sectional area of ​​the first fluid channel 21, leading to a gradual increase in water flow velocity and pressure. This creates a high-pressure fluid section within the first fluid channel 21, allowing water to flow more smoothly into the second fluid channel 31, facilitating the flow of fluid from the first fluid channel 21 to the second fluid channel 31.

[0054] For example, in Figure 3 In the example, the cross-sectional area of ​​the first fluid channel 21 near the nozzle 3 is adapted to the cross-sectional area of ​​the second sub-fluid channel 312 near the body 2. This arrangement, on the one hand, allows the water flow velocity to gradually decrease as the cross-sectional area increases, thereby reducing the pressure of the fluid impact on the connection between the first fluid channel 21 and the second sub-fluid channel 312, reducing the possibility of loosening or leakage at the connection, and improving the assembly stability of the nozzle 100. On the other hand, the increased cross-sectional area of ​​the first fluid channel 21 near the nozzle 3 makes the inner circumferential dimensions of the first fluid channel 21 more compatible with the inner circumferential dimensions of the lower end of the second sub-fluid channel 312, thus facilitating the smooth flow of fluid from the first fluid channel 21 into the second sub-fluid channel 312, improving flow efficiency, and thus benefiting the use of the nozzle 100.

[0055] According to some embodiments of this utility model, combined with Figure 5 A first connecting line 122 is formed between one end of the flow channel 121 and the other end of the flow channel 121. The angle between the first connecting line 122 and the axis of the second fluid channel 31 is α, where α satisfies: 5.2°≤α≤6.4°.

[0056] For example, in Figure 5 In the example, the line connecting the upper and lower endpoints of the flow channel 121 on the inner wall of the second sub-fluid channel 312 is the first connecting line 122. The straight line R is the axis of the extension direction of the second fluid channel 31, and the angle between the first connecting line 122 and the straight line R is α.

[0057] When the angle α between the first connecting line 122 and the axis of the second fluid channel 31 is greater than 6.4°, the angle is too large. On one hand, a large angle results in a high degree of water flow diffusion, causing energy dispersion during spraying and reducing the pressure of the fluid acting on the tooth surface, thus weakening the impact force. On the other hand, due to the large water flow diffusion angle, the water is more likely to deviate from the oral cavity when using the water flosser, resulting in water splashing. This not only wets clothing and the surrounding environment but also affects the user experience, reducing convenience and comfort. When the angle α between the first connecting line 122 and the axis of the second fluid channel 31 is less than 5.2°, the angle is too small. An excessively small angle causes the water flow from the spiral channel 121 to concentrate too much near the central axis R of the nozzle 3. The water flow from channel 121 tends to be straight, hindering the formation of a vortex and reducing the smoothness of the water flow from the nozzle 100. Because the water flow is concentrated near the central axis R, the impact force at the edges of the nozzle 3 is weak, while the impact force in the center is excessive. This may cause excessive impact on localized gums or teeth, easily leading to problems such as bleeding gums and tooth sensitivity, thus reducing the user experience.

[0058] Therefore, by setting the included angle α between the axis of the first connecting line 122 and the axis of the second fluid channel 31 to satisfy: 5.2°≤α≤6.4°, the included angle between the axis of the first connecting line 122 and the axis of the second fluid channel 31 is reasonably set. The appropriate rotation path of the water flow within the spiral channel 121 is conducive to forming a more ideal vortex water flow, which can better conform to the curved surface of the teeth and the gaps between teeth, carrying away food debris and dental plaque from the gaps between teeth and the gingival sulcus, thereby improving the cleaning effect of the nozzle 100. Moreover, when the included angle α is set within the above range, the water flow has a certain dispersion effect after being sprayed, which can reduce the impact force of the water flow and improve the user's comfort. Therefore, when the included angle α between the axis of the first connecting line 122 and the axis of the second fluid channel 31 is within the above range, the nozzle 100 can reduce the fluid impact force while ensuring the cleaning effect, thereby improving the user's experience.

[0059] According to some embodiments of this utility model, combined with Figures 1-4 The width of the flow channel 121 is W, where W satisfies: 0.4mm≤W≤0.5mm.

[0060] When the width W of the flow channel 121 is greater than 0.5 mm, the width of the flow channel 121 is too large, meaning the width of the curved and extended groove on the inner wall of the fluid channel 1 is too large. On the one hand, an excessively large spiral flow channel 121 will lengthen the flow path of the fluid per unit length of the flow channel 121, making the fluid more prone to dispersion during flow, thus reducing the degree of fluid vortex. The reduced degree of fluid vortex will lead to a decrease in the cleaning effect of the nozzle 100 on hidden areas of the oral cavity such as between teeth when the fluid is ejected from the nozzle 100. On the other hand, a wider spiral flow channel 121 will increase the cross-sectional area of ​​the water flow. According to the principles of fluid mechanics, with a constant fluid flow rate, an increase in cross-sectional area will reduce the fluid velocity, meaning that the amount of vortex fluid ejected by the nozzle 3 per unit time will decrease, thus affecting the comprehensiveness of the cleaning effect of the nozzle 100. When the width W of the flow channel 121 is less than 0.4 mm, the width of the flow channel 121 is too small. If the width of the flow channel 121 is too small, it will limit the amount of fluid passing through per unit time, leading to increased fluid resistance and reducing the proportion of vortex fluid in the fluid ejected from the nozzle 100, thereby affecting the formation of the gentle water flow from the nozzle 3. In addition, the small width of the spiral flow channel 121 restricts the rotation space of the water flow within the flow channel 121, increasing the difficulty of forming an ideal vortex water flow.

[0061] Therefore, by setting the width W of the flow channel 121 to satisfy: 0.4mm≤W≤0.5mm, the width of the flow channel 121 is reasonably set. The appropriate width of the flow channel 121 can form a more ideal vortex water flow, giving full play to the cleaning advantages of the vortex water flow, so that the water flow can be more concentrated on the tooth surface and the gaps between teeth and other hard-to-clean areas. Thus, precise cleaning can be achieved while ensuring the fluid is gentle, and the overall cleaning of the nozzle 100 can be improved.

[0062] According to some embodiments of this utility model, combined with Figure 3 and Figure 5 The depth of the flow channel 121 is H, where H satisfies: 3.2mm≤H≤4.0mm.

[0063] When the depth H of the flow channel 121 is greater than 4.0 mm, the depth of the flow channel 121 is too large. On the one hand, if the depth of the flow channel 121 is too large, the path of water flow within the nozzle 100 becomes longer, increasing the friction area with the wall of the flow channel 121. This leads to a significant increase in the resistance to water flow, which will reduce the pressure and velocity of the water flow sprayed from the flow channel 121, thus affecting the cleaning effect of the nozzle 100. Moreover, after the nozzle 100 is used, due to the excessive depth of the flow channel 121, some fluid is likely to remain in the flow channel 121. If this residual water cannot be drained in time, it may breed bacteria and produce odors, affecting the user's experience. On the other hand, the flow channel 121 spirals upward along the inner wall of the first sub-fluid channel 311. If the depth of the flow channel 121 is too large, that is, the axial depth of the spiral flow channel 121 is too large, it increases the manufacturing difficulty of the nozzle 100, further affecting the manufacturing precision of the nozzle 100, reducing the manufacturing efficiency of the nozzle 100, and increasing its manufacturing cost. When the depth H of the flow channel 121 is less than 3.2 mm, the depth of the flow channel 121 is too small. When the fluid flows through the spiral flow channel 121 and is ejected, the degree of fluid vortex is low, and the rotational force and impact force of the fluid are insufficient, making it difficult to effectively remove stubborn stains such as plaque, food debris, and soft deposits from the tooth surface, thus reducing the cleaning efficiency of the nozzle 100. In addition, the vortex fluid can better penetrate into hidden areas of the oral cavity such as between teeth and gingival sulcus, and perform deep cleaning of the oral cavity.

[0064] Therefore, by setting the depth H of the flow channel 121 to satisfy: 3.2mm≤H≤4.0mm, the depth setting of the flow channel 121 is reasonable. When water flows through the spiral flow channel 121 and is ejected along the fluid outlet 12, it is easier to generate a composite fluid that combines vortex fluid and direct flow. The vortex water flow can better conform to the tooth surface and interdental spaces, and the rotational force carries away food debris and plaque from the gaps between teeth and the gingival sulcus. The direct flow water has a strong impact force and can directly rinse away stubborn stains on the tooth surface. The combination of vortex fluid and direct flow allows the nozzle 100 to clean all parts of the teeth more comprehensively and thoroughly, improving the oral cleaning effect of the nozzle 100. In addition, when the depth of the flow channel 121 is set reasonably, it can also reduce the manufacturing difficulty of the nozzle 100, improve the manufacturing efficiency of the nozzle 100, and reduce the manufacturing cost.

[0065] A water flosser according to a second aspect of the present invention includes a nozzle 100 for a water flosser according to the first aspect of the present invention.

[0066] According to the embodiments of the present invention, the water flosser, by employing the aforementioned nozzle 100, produces a vortex-shaped water flow from the water flosser, thereby improving the cleaning effect. Furthermore, it effectively reduces the impact and pressure exerted by the water flosser on various parts of the oral cavity, improving user comfort.

[0067] The nozzle 100 for the oral irrigator according to the embodiments of the present invention, as well as other components and operation of the oral irrigator, are known to those skilled in the art and will not be described in detail here.

[0068] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0070] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A nozzle for use in an oral irrigator, the nozzle comprising: The nozzle has a fluid channel, and a fluid outlet is formed at one end of the fluid channel. The fluid outlet is connected to the fluid channel. Multiple flow channels are formed on the inner wall surface of the fluid channel at least near the fluid outlet. The multiple flow channels are arranged at intervals along the circumference of the fluid outlet, and the flow channels extend and bend along the length of the nozzle.

2. The nozzle for an oral irrigator of claim 1, wherein, The nozzle includes: The body having a first fluid channel formed thereon; The nozzle is connected to one end of the body along its length. A second fluid channel is formed on the nozzle. The second fluid channel and the first fluid channel are connected to form the fluid channel. The fluid outlet is formed at one end of the nozzle away from the body. The flow path is formed on the second fluid channel.

3. The nozzle for an oral irrigator of claim 2, wherein, The flow channel extends through the end face of the nozzle that is away from the body.

4. The nozzle for an oral irrigator of claim 2, wherein, The second fluid channel includes: The first sub-fluid channel, one end of the body is fitted into the first sub-fluid channel; The second sub-fluid channel and the first sub-fluid channel are arranged along the extension direction of the nozzle, and the flow channel is formed on the second sub-fluid channel.

5. The nozzle for an oral irrigator of claim 4, wherein, Along the direction from the body toward the nozzle, the inner circumferential area of ​​the second sub-fluid channel segment gradually decreases; and / or, The cross-sectional area of ​​the first sub-fluid channel is larger than that of the second sub-fluid channel, and a stepped portion is constructed between the first sub-fluid channel and the second sub-fluid channel, with one end face of the body contacting the stepped portion.

6. The nozzle for an oral irrigator of claim 4, wherein, One end of the flow channel is connected to the first fluid channel, and the other end of the flow channel extends circumferentially along the second sub-fluid channel toward the side where the fluid outlet is located.

7. The nozzle for an oral irrigator of claim 4, wherein, Along the direction of the body toward the nozzle, the cross-sectional area of ​​the first fluid channel located within the first sub-fluid channel gradually decreases and then gradually increases.

8. The nozzle for an oral irrigator of claim 2, wherein, A first line is formed between one end of the flow channel and the other end of the flow channel, and the angle between the first line and the axis of the second fluid channel is α, wherein α satisfies: 5.2°≤α≤6.4°.

9. The nozzle for an oral irrigator of any one of claims 1-8, wherein, The width of the flow channel is W, wherein W satisfies: 0.4mm ≤ W ≤ 0.5mm; and / or, The depth of the flow channel is H, wherein H satisfies: 3.2mm≤H≤4.0mm.

10. An oral irrigator characterized by, Includes the nozzle for a water flosser according to any one of claims 1-9.

Images