Nozzle and oral irrigator

Abstract

The utility model relates to a nozzle and a water pick. The nozzle comprises a main body and a head end arranged on the main body, the head end is provided with a water outlet, the main body is provided with a first flow channel, the head end is provided with a third flow channel, the third flow channel is connected with the water outlet, and the sectional area of the third flow channel is smaller than that of the first flow channel; wherein a second flow channel is arranged between the first flow channel and the second flow channel, and the second flow channel is communicated with the first flow channel and the second flow channel. According to the scheme provided by the invention, teeth can be powerfully cleaned, and meanwhile, gingiva is not damaged.

Description

Technical Field

[0001] The present application relates to the technical field of oral cleaning, and in particular to a nozzle and an oral irrigator. Background Art

[0002] When a user uses a water flosser, a cleaning fluid with a high speed rushes out from the nozzle of the water flosser, impacting the user's teeth and playing a cleaning role. Among them, the structural design of the infusion channel inside the nozzle for conveying the cleaning fluid will affect the flow state such as the speed, liquid output and impact force of the cleaning fluid sprayed out by the nozzle.

[0003] In the related art, due to defects in the structural design of the nozzle, there is a common conflicting demand for cleaning power and comfort in water flossers. If the cleaning power is too weak, the cleaning effect is not obvious, and if the cleaning power is too strong, it is easy to cause problems such as bleeding gums, which affects the popularity of water flossers in people's daily oral care. Utility Model Content

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a nozzle and a water flosser, which can powerfully clean teeth without damaging gums.

[0005] The first aspect of the present application provides a nozzle, comprising:

[0006] A main body and a head end provided at the main body, the head end is provided with a water outlet, the main body is provided with a first flow channel, the head end is provided with a third flow channel, the third flow channel is connected to the water outlet, and the cross-sectional area of ​​the third flow channel is smaller than the cross-sectional area of ​​the first flow channel;

[0007] Wherein, a second flow channel for forming a spiral water flow is provided between the first flow channel and the third flow channel, and the second flow channel is communicated with the first flow channel and the third flow channel.

[0008] In one embodiment, the second flow channel is spirally arranged around the axis of the main body; or,

[0009] There are multiple second flow channels, and the multiple second flow channels are distributed in a spiral shape around the axis of the main body.

[0010] In one embodiment, a mounting cavity is provided between the first flow channel and the third flow channel, a flow channel component is accommodated in the mounting cavity, and the second flow channel is provided in the flow channel component.

[0011] In one embodiment, the outer diameter of the flow channel component is smaller than the inner diameter of the first flow channel; and / or,

[0012] The inner diameter of the installation cavity is smaller than the inner diameter of the first flow channel; and / or,

[0013] The outer diameter of the flow channel member is greater than the inner diameter of the third flow channel.

[0014] In one embodiment, a spiral groove is formed on the outer surface of the flow channel component, the opening direction of the groove is away from the axis of the flow channel component, the outer surface of the flow channel component is against the inner wall of the installation cavity, and the groove and the inner wall of the installation cavity define the second flow channel.

[0015] In one embodiment, a confluence cavity is provided between the second flow channel and the third flow channel, and the second flow channel and the third flow channel are connected by the confluence cavity.

[0016] In one embodiment, the water outlet end of the confluence cavity and the water inlet end of the third flow channel are connected by a transition portion, and the transition portion is an arc-shaped surface.

[0017] In one embodiment, the helix angle of the second flow channel is 5-50 degrees.

[0018] In one embodiment, one end of the flow channel component close to the first flow channel is located within the range of the installation cavity; or,

[0019] One end of the flow channel member close to the first flow channel does not extend into the first flow channel.

[0020] In one embodiment, the inner diameter of the installation cavity gradually decreases from the water inlet end to the water outlet end; and / or,

[0021] The outer diameter of the flow channel member gradually decreases from the water inlet end to the water outlet end.

[0022] In one embodiment, the head end is bent, at least a portion of the installation cavity is located at the bend, and the flow channel component is tightly pressed against an inner wall of the installation cavity at the bend.

[0023] In one embodiment, the distance between the bend and the mounting cavity is smaller than the length of the flow channel component.

[0024] In one embodiment, the minimum cross-sectional area D2 of the mounting cavity is larger than the minimum cross-sectional area D3 of the third flow channel and smaller than the minimum cross-sectional area D1 of the first flow channel, and the ratio of D2 to D3 is 2-5; and / or,

[0025] The aspect ratio of the third flow channel to the mounting cavity is 2-10.

[0026] In one embodiment, the number of the second flow channels is 2-7, and the aspect ratio of the second flow channels is 2-4; and / or,

[0027] The minimum diameter of the third flow channel is 0.55mm-0.7mm.

[0028] In one embodiment, the third flow channel includes an expansion section close to the water outlet, the expansion section has a preset expansion angle, and the maximum diameter of the expansion section is located at the water outlet;

[0029] Wherein, the expansion angle is 2-8 degrees, the length of the expansion section is 1.3-2.9 mm; the maximum diameter of the expansion section is 0.75-1.22 mm, and the minimum diameter of the expansion section is 0.55 mm-0.7 mm.

[0030] In one embodiment, a fourth flow channel is further provided between the first flow channel and the second flow channel. The fourth flow channel is provided in the flow channel component and extends axially along the flow channel component. The multiple second flow channels are distributed on the periphery of the fourth flow channel. The water outlet of the fourth flow channel corresponds to the water inlet of the third flow channel in the axial direction of the main body.

[0031] A second aspect of the present application provides a water flosser, comprising the nozzle as described in the first aspect above.

[0032] The technical solution provided by this application may have the following beneficial effects:

[0033] According to the solution of the present application, when the water flosser using the nozzle is started, the second flow channel can convert the axial flow of water into a spiral flow that flows into the third flow channel. Since the cross-sectional area of ​​the third flow channel is smaller than that of the second flow channel, the water flow in the second flow channel suddenly contracts to generate a pressure pulse, which is reflected to the second flow channel and superimposed with the pressure pulse of the flow from the pump body of the first flow channel to form a resonance cavity, thereby causing the flow in the third flow channel to vibrate violently, generating greater pressure pulsations, and inducing the generation of more cavitation bubbles. After flowing out of the nozzle, these bubbles will rapidly expand and explode near the teeth, releasing more energy and instantly generating a stronger impact force, thereby achieving the effect of powerfully cleaning the teeth without damaging the gums.

[0034] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0036] Figure 1 is a schematic structural diagram of a nozzle shown in an embodiment of the present application;

[0037] Figure 2 yes Figure 1 Axial cross-sectional view of the middle nozzle;

[0038] Figure 3 yes Figure 2 A partial enlarged schematic diagram of the head end of the middle nozzle;

[0039] Figure 4 yes Figure 1 Radial cross-sectional view of the nozzle at the tip end

[0040] Figure 5 is a schematic structural diagram of a flow channel component shown in an embodiment of the present application;

[0041] Figure 6 is a schematic structural diagram of a flow channel component shown in another embodiment of the present application;

[0042] Figure 7 It is a schematic structural diagram of a flow channel component shown in another embodiment of the present application.

[0043] Figure numerals: 100, main body; 101, base end; 102, head end; 110, first flow channel; 120, mounting cavity; 121, flow channel member; 122, second flow channel; 1221, first section; 1222, second section; 130, third flow channel; 123, fourth flow channel; 131, straight section; 132, expansion section; 140, water outlet; 150, confluence cavity; 151, transition section. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0045] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0046] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0047] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In the related art, due to the defects in the structural design of the nozzle, there is a common conflict between the cleaning power and comfort of the water flosser. If the cleaning power is too weak, the cleaning effect is not obvious, and if the cleaning power is too strong, it is easy to cause problems such as bleeding gums, which affects the popularity of water flossers in people's daily oral care. In response to the above problems, the embodiments of the present application provide a nozzle that can powerfully clean teeth without damaging the gums.

[0050] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0051] See also Figure 1-Figure 4 The nozzle provided in the present application includes a main body 100 and a base end 101 and a head end 102 respectively arranged at both ends of the main body 100. The base end is provided with a water inlet, and the head end 102 is provided with a water outlet. The water flow direction in the main body 100 is shown in FIG. Figure 1In the direction of the dotted arrow, the main body 100 is provided with a first flow channel 110, and the head end 102 is provided with a third flow channel 130, the third flow channel 130 is connected to the water outlet 140, and the cross-sectional area of ​​the third flow channel 130 is smaller than the cross-sectional area of ​​the first flow channel 110; wherein, a second flow channel 122 is provided between the first flow channel 110 and the third flow channel 130, and the second flow channel 122 is connected to the first flow channel 110 and the third flow channel 130.

[0052] The nozzle can be applied to devices such as oral irrigators. When the nozzle is applied to the oral irrigator, the base end 101 of the nozzle is connected to the water outlet of the water pump on the main body of the oral irrigator, so that the cleaning water flows through the first flow channel 110, the second flow channel 122 and the third flow channel 130 under the action of the water pump, and finally sprayed out through the water outlet 140 of the nozzle, so that the user can use the oral irrigator to rinse the designated position.

[0053] In the solution of the present application, when the water flosser using the nozzle is started, the second flow channel 122 can convert the axially flowing water into the spiral water flow flowing into the third flow channel 130. Since the cross-sectional area of ​​the third flow channel 130 is smaller than that of the second flow channel 122, the water flow in the second flow channel 122 suddenly contracts to generate a pressure pulse, which is reflected to the second flow channel 122 and superimposed with the pressure pulse of the flow from the pump body of the first flow channel 110 to form a resonance cavity, thereby causing the flow in the third flow channel 130 to vibrate violently, generating greater pressure pulsations, and inducing the generation of more cavitation bubbles. After flowing out of the nozzle, these bubbles will rapidly expand and explode near the teeth, releasing more energy and instantly generating a stronger impact force, thereby achieving the effect of powerfully cleaning the teeth without damaging the gums. In addition, the water flow in the first flow channel 110 itself will also have a large disturbance, which will eventually make the spiral water flow in the third flow channel 130 have a greater disturbance, making the pressure in more areas less than the saturated vapor pressure of water vapor, thereby inducing the generation of more cavitation bubbles and increasing the degree of cavitation. These cavitation bubbles gradually grow and develop in the third flow channel 130, eventually making the third flow channel 130 pulsate more violently, thereby having better cleaning power than the cavitation nozzles in the related technology.

[0054] Continue to see Figure 3 In some embodiments, an installation cavity 120 is provided between the first flow channel 110 and the third flow channel 130. The installation cavity 120 accommodates a flow channel component 121. The second flow channel 122 is provided in the flow channel component 121. By installing the flow channel component 121 into the installation cavity 120, the setting of multiple second flow channels 122 can be achieved, which is easier to produce and manufacture and reduces the process cost.

[0055] In some embodiments, the outer diameter of the flow channel member 121 is smaller than the inner diameter of the first flow channel 110, or the cross-sectional area of ​​the installation cavity 120 is smaller than the cross-sectional area of ​​the first flow channel 110, or the inner diameter of the installation cavity 120 is smaller than the inner diameter of the first flow channel 110. During assembly, the flow channel member 121 can be placed into the first flow channel 110 at the water inlet of the first flow channel 110, and then the flow channel member 121 in the first flow channel 110 is moved to the installation cavity 120, so that the flow channel member 121 is fixed to the installation cavity 120, and the installation is more convenient.

[0056] In some embodiments, the outer diameter of the flow channel component 121 is larger than the inner diameter of the third flow channel 130, or the cross-section of the installation cavity 120 is larger than the cross-sectional area of ​​the third flow channel 130. Since the direction of the water flow is from the first flow channel 110 to the third flow channel 130, when the impact of the water flow applies pressure on the flow channel component 121 toward the water outlet 140, the flow channel component 121 can be pressed against the water inlet of the third flow channel 130, and the position is more stable.

[0057] In some embodiments, the second flow channel 122 is spirally disposed around the axis of the main body, so as to form a spiral water flow.

[0058] See also Figure 5-Figure 7 In some embodiments, there are multiple second flow channels 122, and the multiple second flow channels 122 are spirally distributed around the axis of the main body, so that a spiral water flow can be formed.

[0059] It is understandable that the present application does not limit the shape and number of the second flow channels 122 as long as a spiral water flow can be formed.

[0060] In some embodiments, the flow channel member 121 and the mounting cavity 120 are both cylindrical, and a plurality of second flow channels 122 are disposed on the outer periphery of the flow channel member 121. Specifically, a spiral groove is provided on the outer surface of the flow channel member 121, and the opening direction of the groove is away from the axis of the flow channel member 121. The outer surface of the flow channel member 121 is abutted against the inner wall of the mounting cavity 120, and the groove and the inner wall of the mounting cavity 120 define the second flow channel 122, thereby simplifying the structure of the flow channel member 121 and the nozzle.

[0061] like Figure 3As shown, the length L1 of the first flow channel 110 is 55-75mm, specifically 52mm, 53mm or 65mm; the length L2 of the mounting cavity 120 is 2.5-4.2mm, specifically 2.2mm, 3.2mm or 4.1mm; the inner diameter of the mounting cavity is 2mm, 2.5mm or 2.8mm; the inner diameter of the first flow channel is 2.8mm, 3.2 or 3.5mm; the length L3 of the confluence cavity 150 is 0.3-0.6mm, specifically 0.22mm, 0.41mm or 0.52mm; the length L4 of the third flow channel 130 is 1.8-3.5mm, specifically 2.6mm, 3.2mm or 3.4mm. In some embodiments, the sum of the lengths of the first flow channel 110, the second flow channel 122, and the third flow channel 130 is between 80-100 mm, specifically 82 mm, 93 mm, or 98 mm; wherein the length L1 of the first flow channel 110 is greater than the length of the second flow channel 122 and the length L4 of the third flow channel 130. After such a configuration, the parameters of the first flow channel 110, the second flow channel 122, the confluence cavity 150, and the third flow channel 130 form a correlation relationship, and the parameter relationship enables the water flow in the first flow channel 110 to flow into the second flow channel 122 at a specific flow rate, and at the same time, the space of the confluence cavity 150 enables the spiral water flows flowing out of multiple second flow channels 122 to converge, and superimpose with the water flow reflected by the third flow channel to form a standing wave, thereby increasing the pressure pulsation and cavitation degree.

[0062] In some embodiments, multiple second flow channels 122 are symmetrically distributed around the center of the flow channel member 121, and the number of second flow channels 122 is 2-7, specifically 3; the aspect ratio (ratio of length to diameter) of the second flow channel 122 is 2-4, and in some embodiments, the spiral angle of the second flow channel 122 is 5-50 degrees, specifically 8 degrees, 10 degrees, 15 degrees or 35 degrees. In a specific embodiment, the length of the second flow channel 122 is 2mm, 2.5mm or 4mm, and the diameter is 1mm, 1.2mm or 2mm. After such a setting, there is a correlation between the number of the second flow channels 122, the aspect ratio and the spiral angle, and the parameters match each other, so that the water flow output in a spiral shape has sufficient speed and improves the cleaning power.

[0063] See also Figure 5 In some embodiments, the second flow channel 122 includes a first section 1221 and a second section 1222 that are connected, the first section 1221 is close to the water inlet side A of the flow channel member 121, and the second section 1222 is close to the water outlet side B of the flow channel member 121, wherein the first section 1221 is parallel to the axial direction of the flow channel member 121, and the second section 1222 is inclined relative to the axial direction of the flow channel member 121 or the second section 1222 is spiral.

[0064] See also Figure 6In some embodiments, the second flow channel 122 is overall inclined or spiral on the flow channel member 121 .

[0065] In some embodiments, the third flow channel 130 is disposed along the axial direction of the main body 100 and is straight.

[0066] See also Figure 3 In some embodiments, the third flow channel 130 includes an expansion section 132 near the water outlet 140, the expansion section 132 has a preset expansion angle, and the maximum diameter of the expansion section 132 is located at the water outlet 140; wherein the expansion angle is 2-15 degrees, and the length of the expansion section 132 is 1.3-2.9 mm; the maximum diameter of the expansion section 132 (i.e., the diameter of the water outlet) is 0.75-1.28 mm, and the minimum diameter of the expansion section (i.e., the minimum diameter of the third flow channel) is 0.55 mm-0.7 mm. In a specific embodiment, the diameter of the water outlet 140 is 0.75 mm, 0.92 mm or 1.2287 mm, the minimum diameter of the third flow channel 130 is 0.58 mm, 0.62 mm or 0.69 mm, the expansion angle of the expansion section 132 of the third flow channel 130 is 3°, 8° or 12°, and the length of the expansion section 132 of the third flow channel 130 is 1.3 mm, 2.3 mm or 2.9 mm. After such a setting, a correlation is formed between the minimum diameter, maximum diameter, length of the expansion section 132 and the expansion angle of the third flow channel 130, so that the water flow output from the third flow channel 130 has a sufficient speed, and more cavitation bubbles can be induced to improve the degree of cavitation.

[0067] In some embodiments, the third flow channel 130 is composed of a straight section 131 and an expansion section 132 , wherein the straight section 131 is close to one side of the installation cavity 120 , and the expansion section 132 is close to one side of the water outlet 140 .

[0068] Continue to see Figure 3 In some embodiments, a confluence cavity 150 is provided between the second flow channel 122 and the third flow channel 130, and the second flow channel 122 and the third flow channel 130 are connected by the confluence cavity 150. The confluence cavity 150 is used to make the fluid pulse reflected by the third flow channel 130 and the fluid pulse of the second flow channel 122 superimpose to form a standing wave. Since the cross-sectional area of ​​the third flow channel 130 is smaller than the cross-sectional area of ​​the first flow channel 110, the spiral water flow generates a pressure pulse due to the sudden contraction, which is reflected to the confluence cavity 150 of the second flow channel 122, and the pressure pulse of the spiral flow of the second flow channel 122 is superimposed in the confluence cavity 150 to form a standing wave. When the excitation frequency is the same as the eigenfrequency of the oscillation cavity of the first flow channel 110, resonance will be formed, so that the first flow channel 110 forms a resonance cavity, and the pressure pulsation of the first flow channel 110 is increased, which can increase the water flow speed of the third flow channel 130 and further enhance the cleaning power.

[0069] In some embodiments, the minimum cross-sectional area D2 of the installation cavity 120 is greater than the minimum cross-sectional area D3 of the third flow channel 130, and less than the minimum cross-sectional area D1 of the first flow channel 110, and the ratio of D2 to D3 is 2-5; and / or the aspect ratio of the third flow channel 130 to the installation cavity 120 is 2-10. In this way, the spiral water flow can generate a larger pressure pulse due to the sudden contraction and reflect it to the confluence cavity 150, thereby enhancing the resonance of the first flow channel 110, thereby further increasing the pressure pulsation of the first flow channel 110.

[0070] In some embodiments, there is a spacing area between the flow channel member 121 and the third flow channel 130, and the spacing area forms a confluence cavity 150, so that a confluence cavity 150 with a larger cross-section can be formed between the flow channel member 121 and the third flow channel 130. The spacing area can be set independently, or it can be a part of the installation cavity 120 close to the third flow channel 130.

[0071] In some embodiments, the cross-section of the confluence chamber 150 gradually decreases in the water outlet direction, or the water outlet end of the confluence chamber 150 is connected to the water inlet end of the third flow channel 130 by a transition portion 151, and the transition portion 151 is an arc-shaped surface. The water flow can flow into the water inlet of the third flow channel along the arc-shaped surface, which can reduce the water flow resistance, so that the spiral water flow flowing out of the second flow channel 122 can smoothly enter the third flow channel 130, thereby reducing energy loss.

[0072] In some embodiments, one end of the flow channel component 121 close to the first flow channel 110 is located within the range of the installation cavity 120, or one end of the flow channel component 121 close to the first flow channel 110 does not extend into the first flow channel 110. In this way, the water flow in the first flow channel 110 can enter the second flow channel 122 more smoothly without causing energy loss due to obstruction of the flow channel component 121.

[0073] In some embodiments, the inner diameter of the installation cavity 120 gradually decreases from the base end to the water outlet end; and / or, the outer diameter of the flow channel member 121 gradually decreases from the water inlet end to the water outlet end. This not only facilitates the installation of the flow channel member 121, but also when the impact of the water flow applies pressure to the flow channel member 121 toward the water outlet 140, the outer periphery of the flow channel member 121 can more stably press against the inner wall of the installation cavity 120, and the installation is more stable.

[0074] In some embodiments, the head end 102 is bent, and at least a portion of the installation cavity 120 is located at the bend. Specifically, the flow channel component 121 can be arranged downstream of the bend, and the flow channel component 121 is tightly pressed against the inner wall of the installation cavity 120 at the bend. After being arranged in this way, the flow channel component 121 is not easy to separate from the installation cavity 120 under its own weight or water flow impact.

[0075] The bend is located between the mounting cavity 120 and the third flow channel 130 , and the distance between the bend and the mounting cavity 120 is smaller than the length of the flow channel component 121 , so that the flow channel component 121 can be more tightly pressed against the inner wall of the mounting cavity 120 at the bend, thereby further preventing the flow channel component 121 from escaping from the mounting cavity 120 .

[0076] See also Figure 3 and Figure 7 In some embodiments, a fourth flow channel 123 is further provided between the first flow channel 110 and the second flow channel 122. The fourth flow channel 123 is provided on the flow channel member 121 and extends along the axial direction of the flow channel member 121. A plurality of second flow channels 122 are distributed on the periphery of the fourth flow channel 123. The water outlet of the fourth flow channel 123 corresponds to the water inlet of the third flow channel 130 in the axial direction of the main body.

[0077] Since the water flow direction of the fourth flow channel 123 is along the axial direction, through such a setting, the water flow entering the third flow channel 130 includes the spiral water flow from the second flow channel 122 and the axial water flow from the fourth flow channel 123. The superposition of the two not only has better comfort, but also has a stronger cleaning effect. In addition, by setting the fourth flow channel 123 in the axial direction of the flow channel member 121, the inner diameter of each second flow channel 122 can be set relatively large, and the water flow through the second flow channel 122 is also larger, which ultimately makes the third flow channel 130 pulsate more violently, which can further improve the cleaning effect. Compared with the related art, the nozzle provided in this application has a significantly improved cleaning force, and the impact force is reduced by about 2g relative to the impact force of the cavitation nozzle of the related art. The actual cleaning force is at least 10.6% higher than the cavitation nozzle of the related art, and the comfort and cleaning force are improved.

[0078] The present application also provides a water flosser, including a main body and a nozzle as in any of the above embodiments, the nozzle is installed on the main body 100, a water pump outlet is provided on the main body, and the base end 101 of the nozzle is installed at the water pump outlet. The structure of the nozzle refers to the description of the above embodiments and will not be repeated here.

[0079] When the water flosser of the present application is started, since the multiple second flow channels 122 distributed on the outer periphery of the axis of the main body 100 are spiral, the multiple second flow channels 122 can convert the axially flowing water into the spiral water flow flowing into the third flow channel 130. Since the cross-sectional area of ​​the third flow channel 130 is smaller than that of the second flow channel 122, the water flow in the second flow channel 122 suddenly contracts to generate a pressure pulse, and is reflected to the second flow channel 122, and is superimposed with the pressure pulse of the flow from the pump body of the first flow channel 110 to form a resonance cavity, so that the flow in the third flow channel 130 vibrates violently, generating greater pressure pulsations, and inducing more cavitation bubbles. After flowing out of the nozzle, these bubbles will rapidly expand and explode near the teeth, releasing more energy, and instantly generating a stronger impact force, thereby achieving the effect of powerful cleaning of teeth without damaging the gums.

[0080] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A nozzle, characterized in that: include: A main body and a head end provided at the main body, the head end is provided with a water outlet, the main body is provided with a first flow channel, the head end is provided with a third flow channel, the third flow channel is connected to the water outlet, and the cross-sectional area of ​​the third flow channel is smaller than the cross-sectional area of ​​the first flow channel; Wherein, a second flow channel for forming a spiral water flow is provided between the first flow channel and the third flow channel, and the second flow channel is communicated with the first flow channel and the third flow channel.

2. The nozzle according to claim 1, characterized in that: The second flow channel is spirally arranged around the axis of the main body; or, There are multiple second flow channels, and the multiple second flow channels are distributed in a spiral shape around the axis of the main body.

3. The nozzle according to claim 1, characterized in that: An installation cavity is provided between the first flow channel and the third flow channel, a flow channel component is accommodated in the installation cavity, and the second flow channel is provided in the flow channel component.

4. The nozzle according to claim 3, characterized in that: The outer diameter of the flow channel member is smaller than the inner diameter of the first flow channel; and / or, The inner diameter of the installation cavity is smaller than the inner diameter of the first flow channel; and / or, The outer diameter of the flow channel member is greater than the inner diameter of the third flow channel.

5. The nozzle according to claim 3, characterized in that: The outer surface of the flow channel component is provided with a spiral groove, the opening direction of the groove is away from the axis of the flow channel component, the outer surface of the flow channel component is against the inner wall of the installation cavity, and the groove and the inner wall of the installation cavity define the second flow channel.

6. The nozzle according to claim 1, characterized in that: A confluence cavity is provided between the second flow channel and the third flow channel, and the second flow channel and the third flow channel are communicated with each other through the confluence cavity.

7. The nozzle according to claim 6, characterized in that: The water outlet end of the confluence cavity is connected to the water inlet end of the third flow channel by a transition portion, and the transition portion is an arc-shaped surface.

8. The nozzle according to claim 1, characterized in that: The helical angle of the second flow channel is 5-50 degrees.

9. The nozzle according to claim 3, characterized in that: One end of the flow channel component close to the first flow channel is located within the range of the installation cavity; or, One end of the flow channel member close to the first flow channel does not extend into the first flow channel.

10. The nozzle according to claim 3, characterized in that: The inner diameter of the installation cavity gradually decreases from the water inlet end to the water outlet end; and / or, The outer diameter of the flow channel member gradually decreases from the water inlet end to the water outlet end.

11. The nozzle according to claim 3, characterized in that: The head end is bent, at least part of the installation cavity is located at the bend, and the flow channel component is tightly pressed against the inner wall of the installation cavity at the bend.

12. The nozzle according to claim 11, characterized in that: The distance between the bending part and the mounting cavity is smaller than the length of the flow channel component.

13. The nozzle according to claim 3, characterized in that: The minimum cross-sectional area D2 of the installation cavity is larger than the minimum cross-sectional area D3 of the third flow channel and smaller than the minimum cross-sectional area D1 of the first flow channel, and the ratio of D2 to D3 is 2-5; and / or, The aspect ratio of the third flow channel to the mounting cavity is 2-10.

14. The nozzle according to claim 1, characterized in that: The number of the second flow channels is 2-7, and the aspect ratio of the second flow channels is 2-4; and / or, The minimum diameter of the third flow channel is 0.55mm-0.7mm.

15. The nozzle according to claim 1, characterized in that: The third flow channel comprises an expansion section close to the water outlet, the expansion section has a preset expansion angle, and the maximum diameter of the expansion section is located at the water outlet; Wherein, the expansion angle is 2-8 degrees, the length of the expansion section is 1.3-2.9 mm; the maximum diameter of the expansion section is 0.75-1.22 mm, and the minimum diameter of the expansion section is 0.55 mm-0.7 mm.

16. The nozzle according to any one of claims 3-5, 9-12, characterized in that: A fourth flow channel is also provided between the first flow channel and the second flow channel. The fourth flow channel is provided in the flow channel component and extends axially along the flow channel component. The multiple second flow channels are distributed on the periphery of the fourth flow channel. The water outlet of the fourth flow channel corresponds to the water inlet of the third flow channel in the axial direction of the main body.

17. A water flosser, characterized in that: Comprising a nozzle as described in any one of claims 1-16.

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