Nozzle and oral irrigator

Abstract

The utility model discloses a nozzle and oral irrigator relates to oral irrigator technical field, wherein, nozzle is applied to oral irrigator, the nozzle includes the stem, has the water passageway, and the water passageway one end is the water outlet end, the cover, has the first installation slot and with first water outlet hole and second water outlet hole of first installation slot intercommunication, the cover movablely is located in water outlet end along the water passageway's water outlet direction, to make the cover have first position and second position, when in second position, the water outlet end with the slot wall interval arrangement of first installation slot to form to have the delivery passageway, the delivery passageway one end with first water outlet hole and second water outlet hole intercommunication, the delivery passageway's other end with water passageway intercommunication, the utility model provides technical scheme for the cover relative stem's movement, to realize first water outlet hole and second water outlet hole's switching, thereby has overcome the single problem of the water outlet mode of existing oral irrigator.

Description

Technical Field

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

[0002] Traditional oral hygiene primarily relies on toothbrushes and dental floss. Toothbrushes are ineffective at cleaning the interdental spaces and below the gum line, while dental floss, though effective at cleaning between teeth, is inconvenient to use and has limited reach into the deep gingival sulcus. Water flossers use a jet of water to remove food debris and plaque from these areas, cleaning and massaging the gums, thus improving oral hygiene efficiency. However, existing water flossers often have a single water flow pattern, unable to adapt to individual user oral conditions or sensitivity differences, resulting in a user experience and cleaning effectiveness that fails to meet the growing demands in diverse application scenarios. Utility Model Content

[0003] The main purpose of this invention is to propose a nozzle and a water flosser, which aims to improve the problem of the limited water output mode of existing water flossers.

[0004] To achieve the above objectives, the present invention proposes a nozzle for use in a water flosser. The nozzle includes a rod body with a water passage. One end of the water passage is an outlet, and the other end is an inlet. The inlet is mounted on the body of the water flosser. The water passage includes a gradually expanding section, the inner diameter of which gradually increases from the end near the inlet towards the end near the outlet. A cover has a first mounting groove and a first and a second water outlet communicating with the first mounting groove. The cover is movably disposed at the outlet along the water outlet direction of the water passage, so that the cover has a first position and a second position. In the first position, the outlet abuts against the groove wall of the first mounting groove to block the second water outlet, and the water passage communicates with the first water outlet. In the second position, the outlet is spaced apart from the groove wall of the first mounting groove to form a conveying channel. One end of the conveying channel communicates with the first and second water outlets, and the other end communicates with the water passage.

[0005] In one embodiment, the outer wall of the rod near the water outlet end has a slide rail, and the inner wall of the cover has a sliding part, which is slidably connected to the slide rail, so that the cover has the first position and the second position.

[0006] In one embodiment, the slide rail includes a first slide rail and a second slide rail, which are spaced apart on the rod body along a first direction. The sliding part includes a first sliding part and a second sliding part, which are spaced apart on the cover body along the first direction. The first sliding part is slidably disposed on the first slide rail, and the second sliding part is slidably disposed on the second slide rail.

[0007] In one embodiment, the slide rail includes a first straight section, a connecting section, and a second straight section connected in sequence. The first straight section and the second straight section are staggered along the extension direction of the water passage, and the connecting section is inclined relative to the first straight section and / or the second straight section.

[0008] In one embodiment, the cover includes a first half-cover and a second half-cover connected to each other. The inner sidewall of the first half-cover is provided with the first sliding part, and the inner sidewall of the second half-cover is provided with the second sliding part. The first half-cover is slidably disposed on the first slide rail via the first sliding part, and the second half-cover is slidably disposed on the second slide rail via the second sliding part.

[0009] In one embodiment, one of the first half-cover and the second half-cover is provided with a mounting portion, and the other of the first half-cover and the second half-cover is provided with a second mounting groove. The mounting portion is welded to the second mounting groove for connecting the first half-cover and the second half-cover.

[0010] In one embodiment, the rod includes an interconnected mounting section and a limiting section, the cover is slidably disposed on the mounting section, the mounting section is provided with the slide rail, and the limiting section is used for the cover to abut against and restrict the movement of the cover.

[0011] In one embodiment, the rod body includes a first seal and a nozzle. One side of the first seal has an arc-shaped mounting surface. The nozzle has a third mounting groove at one end near the water outlet. The first seal is disposed in the third mounting groove through the mounting surface. The side of the first seal away from the mounting surface has an abutment surface for sealing the second water outlet. The first seal has a third water outlet communicating with the water passage.

[0012] In one embodiment, the water passage includes a tapered section, a transition section, and a widening section that are interconnected. The tapered section and the widening section are located in the mounting section. The tapered section is located on the side of the widening section near the cover. The outer diameter of the tapered section gradually decreases from the end near the cover toward the end near the limiting section, and the inner diameter of the widening section gradually increases from the end near the cover toward the end near the limiting section.

[0013] This invention also proposes a dental flosser, including a nozzle as described in any of the above embodiments.

[0014] The technical solution of this utility model achieves the switching between the first water outlet and the second water outlet by moving the cover relative to the rod, thereby providing two different water outlet modes. Users can adjust the water jet mode according to actual needs, thus overcoming the problem of the single water outlet mode of existing oral irrigators. The water passage includes a gradually expanding section. When the water flows through the gradually expanding section, the water flow velocity decreases and part of the water flow's kinetic energy is converted into pressure energy, thereby greatly avoiding the violent vortex and impact loss caused by the separation of the water flow from the pipe wall of the water passage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A cross-sectional view of an embodiment of the nozzle cover in the first position provided by this utility model; Figure 2 A structural cross-sectional view of an embodiment of the nozzle cover in the second position provided by this utility model; Figure 3 A schematic diagram of the structure of an embodiment of the nozzle pipe provided by this utility model; Figure 4 A schematic diagram of another embodiment of the nozzle pipe provided by this utility model; Figure 5 A schematic diagram of the structure of an embodiment of the nozzle cover provided by this utility model; Figure 6 This is a schematic diagram of the structure of an embodiment of the first sealing element in the nozzle provided by this utility model.

[0017] Explanation of icon numbers: 1. Rod body; 11. Water passage; 111. Water outlet; 112. Gradual narrowing section; 113. Gradual widening section; 114. Transition section; 12. Conveying channel; 13. Slide rail; 131. First slide rail; 132. Second slide rail; 133. First straight section; 134. Connecting section; 135. Second straight section; 14. Mounting section; 15. Limiting section; 16. Spray pipe; 161. Third mounting groove; 2. Cover body; 21. First mounting groove; 22. First water outlet; 23. Second water outlet; 24. Sliding part; 241. First sliding part; 242. Second sliding part; 25. First half cover; 251. Second half cover; 3. First sealing element; 31. Mounting surface; 32. Abutment surface; 33. Third water outlet.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This utility model proposes a nozzle.

[0023] Please see Figure 1 , Figure 2 , Figure 4 and Figure 5 In one embodiment of this utility model, the nozzle is applied to a water flosser. The nozzle includes a rod body 1 with a water passage 11. One end of the water passage 11 is an outlet end 111, and the other end is an inlet end. The inlet end is used to install on the body of the water flosser. The water passage 11 includes a gradually expanding section 113, the inner diameter of which gradually increases from the end near the inlet end toward the end near the outlet end 111. A cover body 2 has a first mounting groove 21 and a first water outlet 22 and a second water outlet 23 communicating with the first mounting groove 21. The cover body 2 extends along the water passage... The water outlet direction of channel 11 is movably disposed at the water outlet end 111, so that the cover 2 has a first position and a second position; in the first position, the water outlet end 111 abuts against the groove wall of the first mounting groove 21 to block the second water outlet 23, and the water passage 11 communicates with the first water outlet 22; in the second position, the water outlet end 111 is spaced apart from the groove wall of the first mounting groove 21 to form a conveying channel 12, one end of the conveying channel 12 communicates with the first water outlet 22 and the second water outlet 23, and the other end of the conveying channel 12 communicates with the water passage 11.

[0024] The technical solution of this utility model achieves the switching between the first water outlet 22 and the second water outlet 23 by moving the cover 2 relative to the rod 1, thereby providing two different water outlet modes. Users can adjust the water jet mode according to actual needs, thus overcoming the problem of the single water outlet mode of existing oral irrigators. The water passage 11 includes a gradually expanding section 113. When the water flows through the gradually expanding section 113, the water flow velocity decreases and part of the kinetic energy of the water flow is converted into pressure energy, thereby greatly avoiding the violent vortex and impact loss caused by the separation of the water flow from the pipe wall of the water passage 11.

[0025] In this embodiment, the rod 1 is mounted on the water flosser so that the water supply component in the water flosser can deliver water to the water passage 11. The rod 1 has a tubular structure and has a water passage 11 that communicates with the water supply component of the water flosser, so that water flows outward through the water passage 11 and the cover 2. The inlet end of the water passage 11 is used to connect to the body of the water flosser, and the water passage 11 communicates with the water supply component through the inlet end. The water passage 11 includes a gradually expanding section 113, which is located at one end of the water passage 11 near the outlet end 111. When the water flows through the gradually expanding section 113, it can reduce the flow velocity of the water flow, reduce the flow resistance of the water flow in the water passage 11, thereby reducing the pressure loss of the water flow and improving the flow rate and efficiency of the water passage 11. The connection between the cover 2 and the water outlet 111 of the rod 1 can be a rotating connection or a sliding connection, allowing the cover 2 to adjust its position by rotation or linear movement, making it easier to adjust the relative position between the cover 2 and the rod 1, thus enabling the cover 2 to have a first position and a second position. The cover 2 has a first water outlet 22 and a second water outlet 23. The first water outlet 22 can be located at the center of the cover 2, and the second water outlet 23 can be arranged around the central axis of the first water outlet 22. The cover 2 may also have a first mounting groove 21, and the water outlet 111 of the rod 1 can be located in the first mounting groove 21, making it easier for the water outlet 111 of the rod 1 to close the second water outlet 23. When the cover 2 is in the first position, the water outlet 111 of the rod 1 is tightly fitted with the groove wall of the first mounting groove 21, and the second water outlet 23 is blocked by the rod 1. The water flow in the water passage 11 is only sprayed out through the first water outlet 22 to form a high-pressure water column, which is suitable for users to remove stubborn food residue. When the cover 2 moves to the second position, the water outlet 111 and the first mounting groove 21 are spaced apart along the water outlet direction of the water passage 11, so that a conveying channel 12 is formed between the water outlet 111 and the groove wall of the first mounting groove 21 near the first water outlet 22. The water in the water passage 11 is sprayed out through the conveying channel 12, the first water outlet 22 and the second water outlet 23 respectively, forming a gentle water column, which is suitable for daily cleaning or for users with sensitive gums. Compared with the prior art, this application allows users to switch the connection state of the first water outlet 22 and the second water outlet 23 with the water passage 11 by rotating the cover 2 or driving the cover 2 to move along the water outlet direction of the water passage 11, making it more convenient for users to adjust the water outlet mode of the oral irrigator.

[0026] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, the outer wall of the rod 1 near the water outlet 111 has a slide rail 13, and the inner wall of the cover 2 is provided with a sliding part 24. The sliding part 24 is slidably connected to the slide rail 13 so that the cover 2 has the first position and the second position.

[0027] In this embodiment, in order to improve the stability of the connection between the rod 1 and the cover 2, the sliding part 24 is slidably connected to the slide rail 13. When the user drives the cover 2 to slide relative to the rod 1, the sliding part 24 slides along the extension direction of the slide rail 13 so that the cover 2 switches between the first position and the second position, thereby making the cover 2 move more stably on the rod 1.

[0028] like Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, the slide rail 13 includes a first slide rail 131 and a second slide rail 132, the first slide rail 131 and the second slide rail 132 are spaced apart on the rod body 1 along a first direction, and the sliding part 24 includes a first sliding part 241 and a second sliding part 242, the first sliding part 241 and the second sliding part 242 are spaced apart on the cover body 2 along the first direction, the first sliding part 241 is slidably disposed on the first slide rail 131, and the second sliding part 242 is slidably disposed on the second slide rail 132.

[0029] In this embodiment, by distributing the first sliding part 241 and the second sliding part 242 on the first slide rail 131 and the second slide rail 132 respectively, the sliding contact area between the cover 2 and the rod 1 is significantly increased, thereby effectively improving the stability of the cover 2 sliding on the rod 1.

[0030] like Figure 4 As shown, in one embodiment, the slide rail 13 includes a first straight section 133, a connecting section 134, and a second straight section 135 connected in sequence. The first straight section 133 and the second straight section 135 are staggered along the extension direction of the water passage 11, and the connecting section 134 is inclined relative to the first straight section 133 and / or the second straight section 135.

[0031] In this embodiment, the present application sets the slide rail 13 to include a first straight section 133, a connecting section 134, and a second straight section 135 connected in sequence, thereby rationally planning the sliding stroke of the cover 2 on the rod 1, and thus making it easier for the cover 2 to switch between the first position and the second position. The present application uses a connecting section 134 that is inclined relative to the first straight section 133 and / or the second straight section 135, and the first straight section 133 and the second straight section 135 are staggered along the extension direction of the water passage 11, so that when the cover 2 slides from the first straight section 133 to the second straight section 135, the cover 2 is displaced relative to the rod 1 along the extension direction of the water passage 11, thereby allowing the cover 2 to switch from the first position to the second position.

[0032] like Figure 5As shown, in one embodiment, the cover 2 includes a first half cover 25 and a second half cover 251 connected to each other. The inner sidewall of the first half cover 25 is provided with the first sliding part 241, and the inner sidewall of the second half cover 251 is provided with the second sliding part 242. The first half cover 25 is slidably disposed on the first slide rail 131 through the first sliding part 241, and the second half cover 251 is slidably disposed on the second slide rail 132 through the second sliding part 242.

[0033] In this embodiment, the inner wall of the first half-cover 25 may be provided with a first sliding part 241, and the outer peripheral wall of the rod 1 has a first slide rail 131 on one side along the first direction. The first half-cover 25 is slidably disposed on the first slide rail 131 through the first sliding part 241, thereby improving the stability of the sliding connection between the cover 2 and the rod 1. The inner wall of the second half-cover 251 may be provided with a second sliding part 242, and the outer peripheral wall of the rod 1 has a second slide rail 132 on the other side along the first direction. The second half-cover 251 is slidably disposed on the second slide rail 132 through the second sliding part 242, thereby improving the stability of the sliding connection between the cover 2 and the rod 1.

[0034] In one embodiment, one of the first half-cover 25 and the second half-cover 251 is provided with a mounting portion (not shown), and the other half of the first half-cover 25 and the second half-cover 251 is provided with a second mounting groove (not shown). The mounting portion is welded to the second mounting groove for connecting the first half-cover 25 and the second half-cover 251.

[0035] In this embodiment, the present application provides a mounting part on one of the first half cover 25 and the second half cover 251, and a second mounting groove on the other half cover 25 and the second half cover 251. The mounting part is welded to the second mounting groove, thereby improving the stability of the connection between the first half cover 25 and the second half cover 251 and improving the assembly efficiency of the cover body 2 and the rod body 1.

[0036] like Figure 1 As shown, in one embodiment, the rod 1 includes an installation section 14 and a limiting section 15 connected to each other. The cover 2 is slidably disposed on the installation section 14. The installation section 14 is provided with the slide rail 13. The limiting section 15 is used for the cover 2 to abut against and restrict the movement of the cover 2.

[0037] In this embodiment, the mounting section 14 and the limiting section 15 are designed as separate units. The outer surface of the mounting section 14 is provided with a slide rail 13 structure, and the corresponding position on the inner wall of the cover 2 is provided with a sliding part 24 structure. The mounting section 14 and the cover 2 are slidably connected. When the user rotates the cover 2, the cover 2 moves along the axial direction of the mounting section 14, thereby realizing the switching of the cover 2 between the first position and the second position. The outer diameter of the limiting section 15 can be larger than the outer diameter of the mounting section 14, so that when the cover 2 rotates to the maximum stroke, it contacts the end face of the limiting section 15, thereby preventing the cover 2 from rotating and avoiding sealing failure or structural damage due to excessive rotation.

[0038] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, in one embodiment, the rod body 1 includes a first sealing member 3 and a nozzle 16. One side of the first sealing member 3 has an arc-shaped mounting surface 31. The nozzle 16 has a third mounting groove 161 at one end near the water outlet end 111. The first sealing member 3 is disposed in the third mounting groove 161 through the mounting surface 31. The side of the first sealing member 3 away from the mounting surface 31 has an abutment surface 32 for sealing the second water outlet 23. The first sealing member 3 has a third water outlet 33 communicating with the water passage 11.

[0039] In this embodiment, the first seal 3 is located between the water outlet 111 of the nozzle 16 and the groove wall of the first mounting groove 21 near the first water outlet 22. The first seal 3 abuts against the groove wall of the first mounting groove 21 and is press-fitted to the groove wall of the first mounting groove 21, so that the first seal 3 blocks the second water outlet 23, thereby preventing water that needs to flow through the first water outlet 22 from flowing into the second water outlet 23. The first seal 3 is a flexible sealing element disposed between the rod body 1 and the cover body 2. The material of the first seal 3 can be rubber or silicone. The mounting surface 31 is set as a protruding structure on the first seal 3. The arc-shaped mounting surface 31 is press-fitted with the groove wall of the third mounting groove 161, which improves the stability of the first seal 3 and the rod body 1. like Figure 1 and Figure 2 As shown, in one embodiment, the water passage 11 includes a tapering section 112, a transition section 114, and a widening section 113 that are interconnected. The tapering section 112 and the widening section 113 are located in the mounting section 14. The tapering section 112 is located on the side of the widening section 113 near the cover 2. The outer diameter of the tapering section 112 gradually decreases from the end near the cover 2 toward the end near the limiting section 15, and the inner diameter of the widening section 113 gradually increases from the end near the cover 2 toward the end near the limiting section 15.

[0040] In this embodiment, the water passage 11 is designed with a segmented structure. Specifically, the water passage 11 includes a tapered section 112, a transition section 114, and a widening section 113 that are interconnected. The widening section 113 is located on the side of the tapered section 112 closer to the outlet end 111. The water flows sequentially through the tapered section 112, the transition section 114, the widening section 113, and the outlet end 111 on the rod 1 before being transported into the cover 2. The tapered section 112 has a tapered outer diameter. When the water flows through the tapered section 112, the flow cross-section of the tapered section 112 gradually decreases, increasing the flow velocity and pressure, thereby forming a more powerful concentrated water flow. This effectively improves the local cleaning efficiency. At the same time, the high-speed water flow can suppress flow separation, reduce turbulence, and help reduce operating noise. When the water flows through the gradually expanding section 113, the flow velocity of the water can be reduced, the flow resistance of the water in the water passage 11 can be reduced, thereby reducing the pressure loss of the water flow and increasing the flow rate and efficiency of the water passage 11.

[0041] This utility model also proposes a water flosser, which includes a nozzle. The specific structure of the nozzle is as described in the above embodiments. Since this water flosser adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0042] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A nozzle for use in a dental flosser, characterized in that, The nozzle includes: The rod body has a water passage, one end of which is a water outlet and the other end of which is a water inlet. The water inlet is used to be installed on the body of the water flosser. The water passage includes a gradually expanding section, the inner diameter of which gradually increases from the end near the water inlet towards the end near the water outlet. The cover has a first mounting groove and a first water outlet and a second water outlet communicating with the first mounting groove. The cover is movably disposed at the water outlet end along the water outlet direction of the water passage so that the cover has a first position and a second position. In the first position, the water outlet abuts against the wall of the first mounting groove to block the second water outlet, and the water passage is connected to the first water outlet; In the second position, the water outlet is spaced apart from the wall of the first mounting groove to form a conveying channel. One end of the conveying channel is connected to the first water outlet and the second water outlet, and the other end of the conveying channel is connected to the water passage.

2. The nozzle as claimed in claim 1, characterized in that, The outer wall of the rod near the water outlet end has a slide rail, and the inner wall of the cover has a sliding part. The sliding part is slidably connected to the slide rail so that the cover has the first position and the second position.

3. The nozzle as described in claim 2, characterized in that, The slide rail includes a first slide rail and a second slide rail, which are spaced apart on the rod body along a first direction. The sliding part includes a first sliding part and a second sliding part, which are spaced apart on the cover body along the first direction. The first sliding part is slidably disposed on the first slide rail, and the second sliding part is slidably disposed on the second slide rail.

4. The nozzle as described in claim 2, characterized in that, The slide rail includes a first straight section, a connecting section, and a second straight section connected in sequence. The first straight section and the second straight section are staggered along the extension direction of the water passage, and the connecting section is inclined relative to the first straight section and / or the second straight section.

5. The nozzle as described in claim 3, characterized in that, The cover includes a first half cover and a second half cover connected to each other. The inner side wall of the first half cover is provided with the first sliding part, and the inner side wall of the second half cover is provided with the second sliding part. The first half cover is slidably disposed on the first slide rail through the first sliding part, and the second half cover is slidably disposed on the second slide rail through the second sliding part.

6. The nozzle as claimed in claim 5, characterized in that, One of the first half-cover and the second half-cover is provided with a mounting part, and the other half of the first half-cover and the second half-cover is provided with a second mounting groove. The mounting part is welded to the second mounting groove for connecting the first half-cover and the second half-cover.

7. The nozzle as claimed in claim 2, characterized in that, The rod includes an installation section and a limiting section connected to each other. The cover is slidably disposed on the installation section, the installation section is provided with the slide rail, and the limiting section is used for the cover to abut against and restrict the movement of the cover.

8. The nozzle as claimed in claim 1, characterized in that, The rod body includes a first seal and a nozzle. The first seal has an arc-shaped mounting surface on one side. The nozzle has a third mounting groove at one end near the water outlet. The first seal is disposed in the third mounting groove through the mounting surface. The side of the first seal away from the mounting surface has an abutment surface for sealing the second water outlet. The first seal has a third water outlet communicating with the water passage.

9. The nozzle as claimed in claim 7, characterized in that, The water passage includes a tapered section, a transition section, and a widening section that are interconnected. The tapered section and the widening section are located in the installation section. The tapered section is located on the side of the widening section that is close to the cover. The outer diameter of the tapered section gradually decreases from the end close to the cover toward the end close to the limiting section, and the inner diameter of the widening section gradually increases from the end close to the cover toward the end close to the limiting section.

10. A dental flosser, characterized in that, Includes the nozzle as described in any one of claims 1 to 9.

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