Oral irrigator and nozzle thereof

Abstract

The oral irrigator comprises the nozzle and a main machine, the nozzle is communicated with the main machine, the nozzle comprises a spraying rod and a spraying head, the spraying rod comprises an insertion part and a transmission part which are connected with each other, the insertion part extends in the first direction, and a main flow channel penetrates through the insertion part and the transmission part; the nozzle comprises a transition part, a first spraying part and a second spraying part, the transition part extends in the second direction, the first spraying part, the second spraying part and the transition part jointly define a track groove to be used for containing teeth, and the included angle alpha between the second direction and the first direction is larger than or equal to 0 and smaller than or equal to 30. The transition part is arranged to be the same as the extension direction of the insertion part or the included angle is within 30 degrees, that is, the extension direction of the transition part is roughly the same as the extension direction of the insertion part, so that the spray rod drives the spray head to move more smoothly in the arrangement direction of the teeth, the spray head is prevented from colliding with the teeth, and the service life of the spray head is prolonged. And meanwhile, a more comfortable holding posture is provided for the user, and the fatigue feeling of arms is effectively relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of toothbrushes, in particular to a toothbrush irrigator and a nozzle thereof. Background Art

[0002] An oral irrigator is a tool for cleaning teeth. The specific working principle is: the nozzle on the oral irrigator is inserted into the user's mouth, the nozzle is used to clamp the two sides of the teeth, and a pulsed water column is sprayed toward the teeth through the water spray port on the nozzle to clean the teeth. In actual use, the nozzle needs to be moved in the mouth to clean the teeth in all positions. Due to the angle design between the nozzle and the extension direction of the spray rod, the oral irrigator in the prior art makes it difficult for the user to move the oral irrigator in a comfortable grip, which increases the user's arm fatigue when using it and reduces the working efficiency of the oral irrigator. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a water flosser and a nozzle thereof, which improve the water flossing experience and relieve the user's arm fatigue.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A nozzle, comprising a spray bar and a spray head, wherein the spray bar is provided with a main flow channel, the spray bar comprises a plug-in portion and a transmission portion connected to each other, the plug-in portion is used to connect to a host, the plug-in portion extends along a first direction X1, and the main flow channel passes through the plug-in portion and the transmission portion; the spray head comprises a transition portion, a first spray portion and a second spray portion, the transition portion extends along a second direction X2, the first spray portion and the second spray portion are arranged at two ends of the transition portion along the second direction X2, the first spray portion and the second spray portion are arranged at intervals in the second direction to jointly surround and form a track groove, the track groove The groove is used to accommodate teeth, the transition part is provided with a transition flow channel, the first nozzle part is provided with a first flow channel and a first nozzle that are interconnected, the second nozzle part is provided with a second flow channel and a second nozzle that are interconnected, the first flow channel and the second flow channel are respectively connected to the transition flow channel, the first nozzle is used to spray liquid toward the second nozzle part, and the second nozzle is used to spray liquid toward the first nozzle part, the transition part is connected to the transmission part, and the main flow channel is connected to the transition flow channel; wherein the angle between the second direction X2 and the first direction X1 is α, 0≤α≤30.

[0006] As one of the implementation modes, a portion of the first spray portion close to the transition portion is perpendicular to the transition portion, a portion of the first spray portion away from the transition portion is bent toward the second spray portion, a portion of the second spray portion close to the transition portion is perpendicular to the transition portion, and a portion of the second spray portion away from the transition portion is bent toward the first spray portion.

[0007] As one of the embodiments, the transition portion is connected to the transmission portion on one side away from the track groove, the transmission portion has a midplane A along the first direction X1 and parallel to the thickness direction of the nozzle, the spray rod is symmetrical about the midplane A, the nozzle has a midplane B along the second direction X2 and parallel to the thickness direction of the nozzle, the nozzle is symmetrical about the midplane B, and the spacing between the midplane A and the midplane B and the cross-section of the nozzle is L1 mm, 0≤L1≤2.

[0008] As one of the implementation modes, along the first direction X1, the transition portion is connected to the end of the transmission portion, and the side of the transition portion away from the track groove is made of soft rubber material; or, the transmission portion is connected to the side of the transition portion away from the track groove, and along the direction perpendicular to the first direction X1, the side of the transmission portion away from the track groove is made of soft rubber material.

[0009] As one implementation manner, the end of the transmission part close to the nozzle is made of soft rubber material, and the end of the transmission part close to the nozzle rotates relative to the nozzle along the width direction of the second nozzle part.

[0010] As one embodiment, a plurality of material reduction grooves are provided on the outer surface of the end of the transmission part close to the nozzle along the width direction of the second nozzle part, so that the nozzle can rotate relative to the transmission part through the material reduction grooves.

[0011] As one embodiment, a plurality of material reduction grooves are provided on the outer surface of the end of the transmission part close to the nozzle along the width direction of the second nozzle part, so that the nozzle can rotate relative to the transmission part through the material reduction grooves.

[0012] As one implementation manner, the material reduction groove extends along the third direction, and the third direction is perpendicular to the first direction X1.

[0013] As one of the embodiments, the transmission portion has a midplane A along the first direction X1 and parallel to the thickness direction of the nozzle, the spray rod is symmetrical about the midplane A, the multiple material reduction grooves are symmetrically distributed about the midplane A, and / or any side of the midplane A includes at least two of the material reduction grooves, and at least two of the material reduction grooves on any side are arranged at intervals in the first direction X1.

[0014] As one implementation manner, the spacing between the material reducing grooves arranged at intervals in the first direction X1 is smaller than the width of the material reducing grooves along the first direction X1.

[0015] As one implementation manner, the axis of the main channel outlet passes through the middle of the extension direction of the transition channel.

[0016] As one implementation manner, along a direction perpendicular to the first direction X1, a distance from the bottom of the track groove to a side of the transmission portion away from the nozzle is L2 mm, 8≤L2≤14.

[0017] As one implementation manner, the plug-in portion extends along a straight line, the transmission portion extends along an arc, the plug-in portion is symmetrical about the midplane A, and the transmission portion is symmetrical about the midplane A; or

[0018] The plug-in portion extends along a straight line, the transmission portion extends along a straight line, the plug-in portion is symmetrical about the midplane A, and the transmission portion is symmetrical about the midplane A; or

[0019] The plug-in portion extends in a straight line, and the transmission portion is composed of multiple sections connected at angles to each other along the extension direction of the midplane A, so that the spray boom is extended in a fold line.

[0020] As one implementation manner, the length of the first spray portion is L3 mm, 3≤L3≤8, and the length of the second spray portion is L4 mm, 3≤L4≤8.

[0021] As one embodiment, in a direction from the first nozzle to the second nozzle, the axis of the first nozzle is inclined away from the transition portion, and in a direction from the second nozzle to the first nozzle, the axis of the second nozzle is inclined away from the transition portion; or

[0022] In the direction from the first nozzle to the second nozzle, the axis of the first nozzle is inclined toward the direction close to the transition portion, and in the direction from the second nozzle to the first nozzle, the axis of the second nozzle is inclined toward the direction close to the transition portion.

[0023] As one embodiment, the axis of the first nozzle and the axis of the second nozzle intersect to form an intersection C, and the distance between the intersection C and the first nozzle portion is greater than the distance between the intersection C and the second nozzle portion.

[0024] As one embodiment, the first nozzle and the second nozzle are opposite to each other, and at least one of the connecting lines of the first nozzle and the second nozzle is located in the same plane as the axis of the plug-in portion.

[0025] As one implementation manner, a projection of the first nozzle on a plane perpendicular to the second direction X2 and a projection of the second nozzle on a plane perpendicular to the second direction X2 do not overlap.

[0026] As one implementation manner, the distance between the first spray portion and the second spray portion is L5 mm, 8≤L5≤14.

[0027] As one embodiment, the first spray portion has a first inner surface and a first outer surface opposite to each other, the second spray portion has a second inner surface and a second outer surface opposite to each other, and the transition portion has a transition inner surface and a transition outer surface opposite to each other;

[0028] The first inner surface, the transition inner surface, and the second inner surface are connected in a smooth transition sequence, or the first outer surface, the transition outer surface, and the second outer surface are connected in a smooth transition sequence.

[0029] As one implementation manner, the width of at least the end portion of the first spray portion gradually decreases in a direction away from the transition portion, and the width of at least the end portion of the second spray portion gradually decreases in a direction away from the transition portion.

[0030] A water flosser comprises a main unit and a nozzle according to any one of the above embodiments, wherein the nozzle is connected to the main unit.

[0031] The beneficial effects of the utility model are as follows: the present application provides a nozzle, the nozzle comprises a spray rod and a spray head, the spray rod is provided with a main flow channel, the spray rod comprises a plug-in portion and a transmission portion connected to each other, the plug-in portion extends along a first direction, and the main flow channel runs through the plug-in portion and the transmission portion; the spray head comprises a transition portion, a first spray portion and a second spray portion, the transition portion extends along a second direction, the first spray portion and the second spray portion are arranged at both ends of the transition portion along the second direction, the first spray portion, the second spray portion and the transition portion are jointly surrounded to form a track groove, and the track groove is used to accommodate teeth, wherein the angle between the second direction and the first direction is α, 0≤α≤30. The present application sets the transition portion in the nozzle to be the same as the extension direction of the plug-in portion or the angle is within 30°, that is, the extension direction of the transition portion is roughly the same as the extension direction of the plug-in portion, so that the spray rod drives the spray head to move more smoothly in the arrangement direction of the teeth, avoiding collision between the spray head and the teeth. The water flosser using the above-mentioned nozzle can make the user's holding posture more comfortable when in use, effectively relieve arm fatigue, and increase the user's comfort experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram showing the structure of the water flosser according to an embodiment of the utility model is shown;

[0033] Figure 2A schematic diagram showing the structure of a nozzle according to an embodiment of the utility model is shown;

[0034] Figure 3 A cross-sectional schematic diagram of a nozzle according to an embodiment of the utility model is shown;

[0035] Figure 4 for Figure 3 The enlarged schematic diagram of D in FIG.

[0036] Figure 5 A schematic diagram showing the outer surface structure of the nozzle of an embodiment of the utility model is shown;

[0037] Figure 6 A schematic diagram of the inner surface structure of the nozzle of the embodiment of the utility model is shown;

[0038] Figure 7 A mid-plane schematic diagram of a nozzle according to an embodiment of the utility model is shown;

[0039] Figure 8 A cross-sectional schematic diagram of a spray bar according to an embodiment of the utility model is shown;

[0040] Fig. 9 Another cross-sectional schematic diagram of the spray bar according to an embodiment of the utility model is shown.

[0041] Description of reference numerals:

[0042] 1000, water flosser; 100, nozzle; 200, host;

[0043] 10. Spray rod; 11. Main channel; 12. Reduction trough; 13. Connecting part; 14. Transmission part;

[0044] 20. Nozzle; 21. Transition part; 22. First nozzle; 23. Second nozzle; 201. Track groove; 211. Transition flow channel; 213. Transition inner surface; 215. Transition outer surface; 221. First flow channel; 223. First nozzle; 225. First inner surface; 227. First outer surface; 232. Second flow channel; 234. Second nozzle; 236. Second inner surface; 238. Second outer surface. DETAILED DESCRIPTION

[0045] In the present invention, the terms "disposed", "provided with", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. 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 referred device or element 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.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0049] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0050] like Figure 1 As shown, an embodiment of the present application provides a water flosser 1000, which includes a nozzle 100 and a main unit 200. The nozzle 100 is connected to the main unit 200. The main unit 200 is provided with a water tank (not shown) and a pressurizing member (not shown). The pressurization will pressurize the liquid in the water tank, causing it to flow toward the nozzle 100 and form a pulsed water column to be ejected from the nozzle 100, thereby cleaning the teeth.

[0051] It should be noted that the nozzle 100 can be detachably connected to the host 200 or fixedly connected to the host 200. The nozzle 100 is connected to the host 200 and communicates with the water tank inside the host 200. The nozzle 100 is used to receive the pressurized liquid inside the water tank and spray the liquid toward the user's teeth to achieve the effect of cleaning the teeth.

[0052] See also Figure 2The nozzle 100 includes a spray rod 10 and a spray head 20. Both ends of the spray rod 10 are respectively connected to the main unit 200 and the spray head 20, and are communicated with the main unit 200 and the spray head 20 respectively. The spray rod 10 is used to guide the liquid in the water tank of the main unit 200 to the spray head 20, and the spray head 20 then sprays the liquid delivered by the spray rod 10 to the user's teeth in the form of a pulsed water column.

[0053] In some embodiments, one end of the spray rod 10 can be detachably connected to the main unit 200, such as a snap connection, a threaded connection, or a magnetic connection, etc., which is not limited in the present application.

[0054] See also Figure 3 The spray bar 10 is provided with a main flow channel 11, and the spray bar 11 includes a plug-in portion 13 and a transmission portion 14 connected to each other. The plug-in portion 13 extends along the first direction X1, and the main flow channel 11 passes through the plug-in portion 13 and the transmission portion 14. The plug-in portion 13 is connected to the host 200, and the transmission portion 14 is connected to the nozzle 20. Through the plug-in portion 13 and the transmission portion 14, the main flow channel 11 is connected to the host 200 and the nozzle 20 respectively, and the main flow channel 11 is used to transport the liquid in the water tank of the host 200 to the nozzle 20.

[0055] The nozzle 20 includes a transition portion 21, a first nozzle portion 22 and a second nozzle portion 23. The transition portion 21 extends along the second direction X2. The first nozzle portion 22 and the second nozzle portion 23 are arranged at both ends of the transition portion 21 along the second direction X2. The first nozzle portion 22 and the second nozzle portion 23 are arranged at intervals in the second direction X2. The first nozzle portion 22, the second nozzle portion 23 and the transition portion 21 are jointly arranged to form a track groove 201. The track groove 201 is used to accommodate teeth. The track groove 201 is provided with a certain width along the second direction X2. This width matches the thickness of the teeth and can be used to accommodate teeth of different thicknesses. Specifically, the track groove 201 has an open end, and the open end is used for the teeth to extend into the track groove 201.

[0056] See again Figure 3 The transition portion 21 is provided with a transition channel 211, the transition portion 21 is connected to the transmission portion 14, and the transition channel 211 is connected to the main channel 11; the first nozzle portion 22 is provided with a first channel 221 and a first nozzle 223 that are connected to each other, and the second nozzle portion 23 is provided with a second channel 232 and a second nozzle 234 that are connected to each other, the first channel 221 and the second channel 232 are respectively connected to the transition channel 211, the first nozzle 223 is used to spray liquid toward the second nozzle portion 23, and the second nozzle 234 is used to spray liquid toward the first nozzle portion 22.

[0057] Specifically, the transition channel 211 guides the liquid in the main channel 11 to the first channel 221 and the second channel 232 respectively. The first channel 221 guides the liquid to the first nozzle 223, and the first nozzle 223 forms a pulsed water column of the liquid and sprays it in the direction of the second nozzle 23; the second channel 232 guides the liquid to the second nozzle 234, and the second nozzle 234 forms a pulsed water column of the liquid and sprays it in the direction of the first nozzle 22. In actual application, the teeth are inserted into the track groove 201. At this time, the posture of the nozzle 20 in the user's mouth is: the first nozzle 223 is facing the inner side of the teeth, and the second nozzle 234 is facing the outer side of the teeth. The first nozzle 223 sprays water in the direction of the second nozzle part 23, that is, sprays water towards the inner side of the teeth, so as to clean the inner side of the teeth, and the second nozzle 234 sprays water in the direction of the first nozzle part 22, that is, sprays water towards the outer side of the teeth, so as to clean the outer side of the teeth, so that both the inner and outer sides of the teeth can be cleaned, thereby improving the efficiency of spraying and washing the teeth; based on this, the first nozzle 223 and the second nozzle 234 spray water relative to each other. In addition to cleaning the inner and outer sides of the teeth, the impact forces generated by the two nozzles on the teeth in two directions can be relatively offset, thereby preventing the teeth from being loosened due to the pressure of the pulsed water column in a single direction.

[0058] See again Figure 2 The plug-in portion 13 extends along the first direction X1, the transition portion 21 extends along the second direction X2, and the angle between the second direction X2 and the first direction X1 is α, 0≤α≤30.

[0059] In actual application, when it is necessary to flush the teeth, the hand-held water flosser 1000 is made to make the nozzle 100 face the user's side, and the nozzle 20 is first inserted into the front teeth that are easy to insert, and then the spray rod 10 is moved as needed. Usually, the user holds the main body 200 of the water flosser or at the plug-in part 13 of the spray rod 10. Since the transition part 21 in the nozzle 20 and the plug-in part 13 of the spray rod 10 extend in the same direction or the angle is within 30°, that is, the extension direction of the transition part 21 is roughly the same as the extension direction of the plug-in part 13, when the user moves the plug-in part 13, the plug-in part 13 drives the nozzle 20 to move in the arrangement direction of the teeth more smoothly, avoiding the collision between the nozzle 20 and the teeth, and at the same time giving the user a more comfortable holding posture, effectively alleviating arm fatigue, and increasing the user's comfort experience.

[0060] In one embodiment, a portion of the first spray portion 22 close to the transition portion 21 is perpendicular to the transition portion 21, a portion of the first spray portion 22 away from the transition portion 21 is bent toward the second spray portion 23, a portion of the second spray portion 23 close to the transition portion 21 is perpendicular to the transition portion 21, and a portion of the second spray portion 23 away from the transition portion 21 is bent toward the first spray portion 22.

[0061] The first spray part 22, the second spray part 23 and the transition part 21 are jointly arranged to form the track groove 201. The first spray part 22 has a free end and a connecting end, wherein the connecting end is connected to the transition part 21, and the free end is bent toward the second spray part 23. Similarly, the second spray part 23 has a free end and a connecting end, wherein the connecting end is connected to the transition part 21, and the free end is bent toward the first spray part 22. Therefore, the open end of the track groove 201 forms a closed shape. When the teeth are inserted into the track groove 201, the free ends of the first spray part 22 and the second spray part 23 are respectively bent in the direction close to the teeth, playing the role of clamping the teeth. When flushing, the relative stability between the spray head 20 and the teeth is improved to avoid the teeth from being separated from the track groove 201 under the reaction force of the pulsed water column, which helps to protect the teeth and prevent the teeth from loosening, and is conducive to flushing fixed positions to enhance the cleaning effect.

[0062] See again Figure 3 , the axis of the outlet of the main channel 11 passes through the middle of the extending direction of the transition channel 211. When the liquid in the main channel 11 flows from the outlet of the main channel 11 to the transition channel 211, since the outlet of the main channel 11 is located in the middle of the extending direction of the transition channel 211, the liquid in the main channel 11 reaches the first channel 221 and the second channel 232 in substantially the same path, ensuring that the first nozzle 223 and the second nozzle 234 can discharge water at the same time, avoiding the water flow from being ejected toward the human body due to the asynchronous discharge of water, thereby improving the safety of the device.

[0063] See also Figure 4 Along the direction perpendicular to the first direction X1, the distance from the bottom of the track groove 201 to the side of the transmission part 14 away from the nozzle 20 is L2 mm, 8≤L2≤14. L2 within this range is beneficial for reducing the foreign body sensation in the oral cavity when the nozzle 20 is extended into the oral cavity, and facilitates the teeth to be stuck in the track groove 201, so that the nozzle 20 can avoid colliding with the teeth while cleaning the teeth.

[0064] Specifically, when the teeth extend into the track groove 201, if L2 is greater than 14 mm, the thickness of the nozzle 20 extending into the oral cavity will increase, which will cause the user's teeth to easily collide with the nozzle 20. At the same time, the user's mouth will be opened to a greater extent and with more effort, and the foreign body sensation in the mouth will be stronger, making it difficult for the nozzle 20 to move in the oral cavity, reducing the user's comfort when using it. If L2 is less than 8 mm, the thickness of the nozzle 20 and the spray rod 10 is too small, resulting in a smaller cross-section of the main channel 11 and a smaller length of the transition channel 211. Therefore, the amount of liquid transported per unit volume of the main channel 11 and the transition channel 211 is smaller, and the amount of water sprayed by the first nozzle 223 and the second nozzle 234 is smaller, thereby reducing the cleaning range of the teeth; at the same time, according to the principles of fluid mechanics, the smaller cross-section of the main channel 11 increases the flow rate of the liquid, while the shorter transition channel 211 cannot effectively buffer the high-speed flowing liquid, thereby increasing the impact force of the pulsed water column formed by the first nozzle 223 and the second nozzle 234. Excessive impact force can easily damage the teeth and cause them to loosen.

[0065] See again Figure 4 The length of the first spray portion 22 is L3 mm, 3≤L3≤8. The first spray portion 22 extends in a direction away from the spray rod 10. Its length is the height of the first spray portion 22 in the oral cavity. If the height of the first spray portion 22 exceeds 8 mm, the first spray portion 22 is likely to collide with the teeth, and the sprayed water column is likely to hit the gums; if the height of the first spray portion 22 is lower than 3 mm, the height of the water column sprayed from the first spray portion 22 is insufficient, and the gaps between teeth cannot be effectively cleaned.

[0066] It can be understood that the length of the second spray portion 23 is L4 mm, 3≤L4≤8, and the second spray portion 23 extends in the direction away from the spray rod 10. Its length is also the height of the second spray portion 23 in the oral cavity. If the height of the second spray portion 23 exceeds 8 mm, the second spray portion 23 is likely to collide with the teeth, and the sprayed water column is likely to hit the gums; if the height of the second spray portion 23 is lower than 3 mm, the height of the water column sprayed from the second spray portion 23 is not enough to effectively clean the gaps between teeth.

[0067] As a preferred embodiment, the length L3 of the first spray portion 22 is at least 2 mm smaller than the length L4 of the second spray portion 23. Since the first spray portion 22 is located on the inner side of the tooth and its height is relatively limited, the length of the first spray portion 22 can be set to be smaller than the length of the second spray portion 23. Specifically, the length of the first spray portion 22 can be set to 3≤L3≤6 mm to ensure that the first spray portion 22 can be smoothly removed from the inner side of the tooth.

[0068] Based on the above structure, when the nozzle 20 is separated from the teeth, the user uses the hand as the axis, and the second nozzle part 23 is located on the outer side of the tooth, and its relative movable displacement is larger, while the first nozzle part 22 is located on the inner side of the tooth, and its relative movable displacement is smaller. In this case, the probability of the first nozzle part 22 being stuck is relatively high, and the length L3 of the first nozzle part 22 is set to be at least 2 mm smaller than the length L4 of the second nozzle part 23, which effectively reduces the probability of tooth sticking.

[0069] It should be noted that the lengths of L3 and L4 are both smaller than the height of the teeth, which facilitates the first spray part 22 and the second spray part 23 to escape from the inside and outside of the teeth.

[0070] The distance between the first nozzle part 22 and the second nozzle part 23 is L5 mm, 8≤L5≤14. The distance between the first nozzle part 22 and the second nozzle part 23 is also the width of the track groove 201 along the second direction X2. Since the track groove 201 is used to accommodate teeth, and the teeth are divided into incisors, canines and molars according to their thickness in the inner and outer directions, the thickness of these three types of teeth gradually increases.

[0071] In order to make the track groove 201 compatible with all types of teeth, the distance between the first nozzle part 22 and the second nozzle part 23 is set to 8 to 14 mm. This setting ensures that the gap between the first nozzle part 22 and the second nozzle part 23 and the teeth is neither too large nor too small. If L5 is less than 8 mm, the width of the track groove 201 along the second direction X2 is small. When the track groove 201 accommodates thicker molars, the teeth are not easy to extend into the track groove 201, and the gap between the first nozzle part 22 and the second nozzle part 23 and the teeth is too small. The teeth easily block the first nozzle 223 and the second nozzle 234, thereby causing the first nozzle 223 and the second nozzle 234 to be unable to spray water columns, affecting the cleaning effect; if L5 is greater than 14 mm, the width of the track groove 201 along the second direction X2 is large. When the teeth extend into the track groove 201, the gap between the first nozzle part 22 and the second nozzle 23 and the teeth is too small. The first nozzle 22 and the second nozzle 23 are large, so that the first nozzle 22 and the second nozzle 23 cannot play a role in clamping and limiting the teeth. As a result, during cleaning, the first nozzle 22 and the second nozzle 23 are easy to move relative to the teeth, and cannot clean a specific position relatively fixedly. At the same time, since the first nozzle 223 and the second nozzle 234 spray out pulsed water columns, this water column has a certain reaction force. If the gap between the first nozzle 22 and the second nozzle 23 and the teeth is too large, the first nozzle 22 and the second nozzle 23 are easy to be dislocated from the user's mouth under this reaction force, causing the water column to be sprayed outside the mouth, which is dangerous.

[0072] In this embodiment, the width of at least the end of the first spray portion 22 gradually decreases in the direction away from the transition portion 21, and the width of at least the end of the second spray portion 23 gradually decreases in the direction away from the transition portion 21. In actual application, when the spray head 20 is inserted into the oral cavity, since the width of the end of the first spray portion 22 and the second spray portion 23 extending into the oral cavity is small, the overall volume of the spray head 20 extending into the oral cavity is smaller, which facilitates the insertion of the spray head 20, reduces the foreign body sensation in the oral cavity, and facilitates the teeth to be stuck in the track groove 201, thereby improving the comfort of the user.

[0073] In one embodiment, from the first nozzle 223 to the second nozzle 234, the axis of the first nozzle 223 is tilted in the direction away from the transition portion 21, and from the second nozzle 234 to the first nozzle 223, the axis of the second nozzle 234 is tilted in the direction away from the transition portion 21. In this way, the first nozzle 223 can spray a pulsed water column in the direction away from the transition portion 21; the second nozzle 234 can spray a pulsed water column in the direction away from the transition portion 21.

[0074] Since the length L3 of the first nozzle part 22 and the length L4 of the second nozzle part 23 are both smaller than the height of the teeth, in order to ensure that the first nozzle 223 and the second nozzle 234 can clean the root part of the teeth, the first nozzle 223 sprays water in a direction away from the transition part 21, and the water column sprayed is directed toward the root part of the teeth, so that it can clean the root part on the inner side of the teeth. Similarly, the second nozzle 234 sprays water in a direction away from the transition part 21, so that it can clean the root part on the outer side of the teeth, thereby improving the cleaning effect.

[0075] In one embodiment, the axis of the first nozzle 223 is tilted toward the transition portion 21 from the first nozzle 223 to the second nozzle 234, and the axis of the second nozzle 234 is tilted toward the transition portion 21 from the second nozzle 234 to the first nozzle 223. Based on such a structure, the first nozzle 223 can spray a pulsed water column toward the transition portion 21, and the pulsed water column sprayed in this direction can clean the middle part of the gap between the inner side of the teeth, so as to wash away the residue in the middle part of the gap between the teeth; similarly, the second nozzle 234 can spray a pulsed water column toward the transition portion 21, and the pulsed water column sprayed in this direction by the second nozzle 234 can clean the middle part of the gap between the outer side of the teeth.

[0076] See again Figure 4, the axis of the first nozzle 223 and the axis of the second nozzle 234 intersect to form an intersection C, and the distance between the intersection C and the first nozzle 22 is greater than the distance between the intersection C and the second nozzle 23. This arrangement allows the first nozzle 223 and the second nozzle 234 to have different water flow exit angles, but the exit water flows of the two can still intersect, ensuring that the positions of the impact forces on the inner and outer sides of the teeth are relative, so that the impact forces can be relatively offset to prevent the teeth from loosening; at the same time, the closer the intersection C is to the second nozzle 23, the closer the pulsed water flow ejected from the first nozzle 223 is to the transition part 21, that is, the closer the pulsed water flow ejected from the first nozzle 223 in the oral cavity is to the middle of the teeth, which can prevent the water flow from impacting the gums and causing gum damage and pain.

[0077] See also Figure 5 and Figure 6 The first spray portion 22 has a first inner surface 225 and a first outer surface 227 relative to each other, the second spray portion 23 has a second inner surface 236 and a second outer surface relative to each other, and the transition portion 21 has a transition inner surface 213 and a transition outer surface 215 relative to each other; the first inner surface 225, the transition inner surface 213, and the second inner surface 236 are connected in a smooth transition in sequence. When flushing the teeth, these three inner surfaces are opposite to the teeth. During the flushing process, the residues in the gaps between the teeth will fall on the three inner surfaces. The three smoothly connected inner surfaces are conducive to the residues sliding off from above, thereby preventing the residues from being left at the corner where the first inner surface 225, the second inner surface 236, and the transition inner surface 213 are connected.

[0078] The first outer surface 227, the transition outer surface 215, and the second outer surface are connected in a smooth transition sequence, so that when the nozzle 20 is extended out of the user's mouth, the sharp outer corners can avoid scratching the user's mouth. At the same time, the smooth outer surface makes it easy to take the nozzle 20 out of the user's mouth and avoids the nozzle 20 from getting stuck.

[0079] See also Figure 7 The transition portion 21 is connected to the transmission portion 14 on one side away from the track groove 201. The transmission portion 14 has a midplane A along the first direction X1 and parallel to the thickness direction of the nozzle 20. The spray rod 10 is symmetrical about the midplane A. The nozzle 20 has a midplane B along the second direction X2 and parallel to the thickness direction of the nozzle 20. The nozzle 20 is symmetrical about the midplane B. The spacing between the midplane A and the midplane B and the cross-section of the nozzle 20 is L1 mm, 0≤L1≤2.

[0080] Specifically, the length of the nozzle 20 in the direction perpendicular to the midplane B is set to the width of the nozzle 20. When L1=0, it is equivalent to the midplane A and the midplane B being the same plane. In this way, the nozzle 20 and the transmission part 14 are symmetrical about the same plane, which is conducive to reducing the size of the nozzle 20 in its width direction. When the nozzle 20 is inserted into the mouth, the user cannot observe the specific position of the nozzle 20 with the eyes, and can only insert it by feeling. The nozzle 20 with a smaller width is conducive to the user's blind field of vision to insert it into the teeth, reducing the foreign body sensation in the mouth. It should be noted that when L1≤2, the distance between the midplane A and the midplane B is small, which can also achieve the above effect.

[0081] In one embodiment, the first nozzle 223 and the second nozzle 234 are opposite to each other, and at least one of the connecting lines of the first nozzle 223 and the second nozzle 234 is located in the same plane with the axis of the plug-in portion 13. Specifically, when the connecting line of the first nozzle 223 and the second nozzle 234 is located in the same plane with the axis of the plug-in portion 13, the pulsed water jets ejected from the first nozzle 223 and the second nozzle 234 can simultaneously rinse the teeth at the same position, which is beneficial for rinsing away the residue stuck in the teeth.

[0082] In one of the embodiments, the projection of the first nozzle 223 on the plane perpendicular to the second direction X2 and the projection of the second nozzle 234 on the plane perpendicular to the second direction X2 do not overlap. Specifically, there are countless straight lines along the second direction X2, and the first nozzle 223 and the second nozzle 234 are not on the same straight line. In this way, the water columns sprayed from the first nozzle 223 and the second nozzle 234 intersect with each other. When cleaning the gaps between teeth, the cleaning range is larger. For example, the water column sprayed from the first nozzle 223 can concentrate on cleaning the middle and upper parts of the gaps between teeth, and the water column sprayed from the second nozzle 234 can concentrate on cleaning the middle and lower parts of the gaps between teeth, thereby improving the cleaning effect.

[0083] Since the angle between the first direction X1 and the second direction X2 is α, 0≤α≤30, when α=0, as a preferred embodiment, the line connecting the first nozzle 223 and the second nozzle 234 can be set to be in the same plane as the axis of the plug-in part 13, and intersect with the axis of the plug-in part 13. This can ensure that the teeth in the same position are flushed at the same time, and can achieve the effect of a larger cleaning range, thereby simplifying the overall structural design of the water flosser 1000.

[0084] More specifically, the apertures of the first nozzle 223 and the second nozzle 234 can be set to between 0.4 and 0.7 mm. This setting ensures the water output of the first nozzle 223 and the second nozzle 234, while ensuring the impact force of the water column. If the aperture is too small, the water output of the first nozzle 223 and the second nozzle 234 is small, reducing the cleaning range; if the aperture is too large, the impact force of the water column sprayed from the first nozzle 223 and the second nozzle 234 is reduced, resulting in the inability to rinse away the residue in the gaps between the teeth, reducing the cleaning effect.

[0085] Along the first direction X1, the transition portion 21 is connected to the end of the transmission portion 14, and the side of the transition portion 21 away from the track groove 201 is made of soft rubber material; or, the transmission portion 14 is connected to the side of the transition portion 21 away from the track groove 201, and along the direction perpendicular to the first direction X1, the side of the transmission portion 14 away from the track groove 201 is made of soft rubber material.

[0086] In actual application, when the transition part 21 is connected to the end of the transmission part 14, the nozzle 20 is inserted into the oral cavity, and the upper teeth of the user are first inserted into the track groove 201. At this time, the back of the transition part 21, that is, the side away from the track groove 201, is opposite to the lower teeth of the user. Due to the action of opening the mouth for a long time, the user is prone to fatigue. At this time, the user's mouth will unconsciously contract, and the lower teeth will move closer to the upper teeth. Then the lower teeth will contact the back of the transition part 21. Making the back of the transition part 21 of soft rubber material can effectively reduce the foreign body sensation caused by the teeth touching. It can be understood that when the transmission part 14 is connected to the side of the transition part 21 away from the track groove 201, making the side of the transmission part 14 away from the track groove 201 of soft rubber material can also play the above role.

[0087] See again Figure 7 The end of the transmission part 14 close to the nozzle 20 is made of soft rubber material, and the end of the transmission part 14 close to the nozzle 20 rotates relative to the nozzle 20 along the width direction of the second nozzle 23; the direction perpendicular to the midplane B is set as the width direction of the second nozzle 23.

[0088] It should be noted that the nozzle 20 needs to be moved in the oral cavity to clean the teeth in all positions. Since the teeth are arranged along an arc, the nozzle 20 in the prior art usually needs to adjust the position of the spray rod 10 according to the curvature of the teeth when moving, which causes the user to frequently change the holding posture, and the operation is very cumbersome.

[0089] In the present application, the material of the end of the transmission part 14 close to the nozzle 20 is set to be a soft rubber material. The soft rubber material is flexible and easy to deform. When the nozzle 20 moves with the curvature of the teeth, the nozzle 20 abuts against the teeth. This abutment force can deflect the soft rubber material, so that the nozzle 20 can be deflected smoothly, and then the position of the nozzle 20 can be quickly adjusted to be in a normal flushing position with the teeth. During this process, the user's holding posture and angle can basically not change, which greatly improves the user's comfort. At the same time, the soft rubber material also has a certain elasticity, which can make the nozzle 20 return to its initial state in a non-stressed state. After use, there is no need to manually correct the position of the nozzle 20, so as to avoid touching the nozzle 20 with hands and causing pollution.

[0090] A plurality of material reducing grooves 12 are provided on the outer surface of the end of the transmission part 14 close to the nozzle 20 along the width direction of the second nozzle part 23 , so that the nozzle 20 can rotate relative to the transmission part 14 through the material reducing grooves 12 .

[0091] Specifically, the material reduction groove 12 is equivalent to digging out a part at the end of the transmission part 14, which plays the role of reducing the thickness of the end of the transmission part 14. The thickness of the soft rubber material located at the material reduction groove 12 is relatively small, which further improves the deformation ability of the soft rubber material, so that the soft rubber material can be easily deflected to the left and right, thereby facilitating the nozzle 20 to move back and forth in the oral cavity to achieve comprehensive cleaning of all teeth.

[0092] The above-mentioned material reduction groove 12 extends along the third direction, the third direction is perpendicular to the first direction X1, and the third direction is parallel to the midplane A. The material reduction groove 12 extends along the third direction on the transmission part 14, that is, extends circumferentially along the transmission part 14, effectively reducing the cross-sectional area of ​​the transmission part 14 at this point, further facilitating the deflection of the nozzle 20 through the material reduction groove 12. At the same time, the extension of the material reduction groove 12 along the third direction can avoid the groove being too deep to affect the hardness of the end of the transmission part 14, thereby affecting the supporting force of the end of the transmission part 14 on the nozzle 20.

[0093] In one embodiment, a plurality of material reduction grooves 12 are symmetrically distributed about the midplane A, which reduces the thickness of the end of the transmission part 14 while ensuring the consistency of the structures on both sides of the transmission part 14 that are symmetrical about the midplane A, thereby increasing the aesthetics of the spray rod 10 and making the structure more reasonable.

[0094] In one of the embodiments, any side of the midplane A includes at least two material reduction grooves 12, and at least two material reduction grooves 12 on any side are arranged at intervals in the first direction X1. A plurality of material reduction grooves 12 are provided and are arranged at intervals in the first direction X1, so as to further improve the deformation ability of the soft rubber material, while ensuring the structural stability of the end of the transmission part 14, and avoiding the material reduction groove 12 from having an excessively large opening that affects the hardness of the soft rubber material and makes it unable to support the nozzle 20.

[0095] The spacing between the plurality of material-reducing grooves 12 arranged in the first direction X1 is smaller than the width of the material-reducing grooves 12 along the first direction X1. The spacing between the plurality of material-reducing grooves 12 is small, so that the positions where the material-reducing grooves 12 are opened at the end of the transmission part 14 can be more concentrated, which is beneficial to the deflection and deformation of the soft material at the end of the transmission part 14, and at the same time effectively limits the length of the soft material at the end of the transmission part 14, saving production costs.

[0096] It should be noted that the material of the nozzle 20 can be a soft rubber material, so that when the teeth are stuck in the track groove 201, the nozzle 20 can be deformed by the squeezing of the teeth to adapt to the teeth of different people; the material of the nozzle 20 can also be a hard material, so as to avoid the nozzle 20 being deformed by the reaction force of the pulsed water column, thereby affecting the impact force of the water column on the teeth and affecting the cleaning effect.

[0097] See also Figure 8 , the plug-in portion 13 extends in a straight line, the transmission portion 14 extends in an arc, the plug-in portion 13 is symmetrical about the midplane A, the plug-in portion 13 is symmetrical about the midplane A, and the transmission portion 14 is symmetrical about the midplane A. Specifically, one end of the plug-in portion 13 is connected to the host 200, and the other end is connected to the transmission portion 14. At least part of the main flow channel 11 is provided inside the plug-in portion 13 and is connected to the host 200. At least part of the main flow channel 11 is provided inside the transmission portion 14 and is connected to at least part of the main flow channel 11 inside the plug-in portion 13 to form a complete main flow channel 11. The plug-in portion 13 can extend in a straight line to facilitate connection with the host 200; the transmission portion 14 can extend in an arc. Since the transmission portion 14 is closer to the user's mouth, it is set to an arc, and its arc portion can avoid the chin and fit the human mouth more closely, so that the user can hold it more comfortably.

[0098] See also Fig. 9 In one embodiment, the transmission part 14 can also be composed of multiple sections connected at angles to each other along the extension direction of the midplane A, so that the spray rod 10 extends in a fold line. The spray rod 10 extended in a fold line can also avoid the chin and fit the human mouth, making it convenient for the spray rod 10 to move along the oral direction.

[0099] In one embodiment, the plug-in portion 13 can extend in a straight line, and the transmission portion 14 can also extend in a straight line. The plug-in portion 13 is symmetrical about the midplane A, and the transmission portion 14 is symmetrical about the midplane A. This arrangement makes the spray rod 10 a rod body extending in a straight line, which is convenient for the spray rod 10 to be connected to the host 200 and the nozzle 20 respectively, and is also more convenient in the production and processing process. Based on such a structure, the main flow channel 11 can be a straight flow channel, which speeds up the flow rate of the liquid through the main flow channel 11, shortens the time it takes for the liquid to reach the nozzle 20, and achieves the effect that the water can be discharged immediately after use.

[0100] Different from the prior art, the present application provides a water flosser 1000, which includes a nozzle 100 and a main unit 200. The nozzle 100 is connected to the main unit 200. The nozzle 100 includes a spray rod 10 and a spray head 20. The two ends of the spray rod 10 are respectively connected to the main unit 200 and the spray head 20, and are respectively connected to the main unit 200 and the spray head 20. The spray rod 10 is used to guide the liquid in the water tank of the main unit 200 to the spray head 20, and the spray head 20 then sprays the liquid delivered by the spray rod 10 to the user's teeth in the form of a pulsed water column. The spray rod 10 is provided with a main channel 11, and the spray rod 11 includes a plug-in portion 13 and a transmission portion 14 that are connected to each other. The plug-in portion 13 extends along the first direction X1, and the main channel 11 runs through the plug-in portion 13 and the transmission portion 14; the nozzle 20 includes a transition portion 21, a first spray portion 22 and a second spray portion 23, and the transition portion 21 extends along the second direction X2. The first spray portion 22 and the second spray portion 23 are arranged at both ends of the transition portion 21 along the second direction X2. The first spray portion 22, the second spray portion 23 and the transition portion 21 are jointly arranged to form a track groove 201, and the track groove 201 is used to accommodate teeth, wherein the angle between the second direction X2 and the first direction X1 is α, 0≤α≤30. The present application sets the transition portion 21 in the nozzle 100 to be the same as the extension direction of the plug-in portion 13 or at an angle of less than 30°, that is, the extension direction of the transition portion 21 is roughly the same as the extension direction of the plug-in portion 13. In this way, the spray rod 10 drives the spray head 20 to move in the arrangement direction of the teeth more smoothly, avoiding collision between the spray head 20 and the teeth, and at the same time giving the user a more comfortable holding posture, effectively alleviating arm fatigue and increasing the user's comfort experience.

[0101] The above is only a specific implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A nozzle, characterized in that: include: A spray bar is provided with a main flow channel, the spray bar comprises a plug-in portion and a transmission portion connected to each other, the plug-in portion is used to connect with the host, the plug-in portion extends along a first direction X1, and the main flow channel runs through the plug-in portion and the transmission portion; A nozzle, comprising a transition portion, a first nozzle portion, and a second nozzle portion, wherein the transition portion extends along a second direction X2, the first nozzle portion and the second nozzle portion are arranged at two ends of the transition portion along the second direction X2, the first nozzle portion and the second nozzle portion are arranged at intervals in the second direction to jointly surround a track groove, the track groove is used to accommodate teeth, the transition portion is provided with a transition flow channel, the first nozzle portion is provided with a first flow channel and a first nozzle port that are interconnected, the second nozzle portion is provided with a second flow channel and a second nozzle port that are interconnected, the first flow channel and the second flow channel are respectively connected to the transition flow channel, the first nozzle port is used to spray liquid toward the second nozzle portion, the second nozzle port is used to spray liquid toward the first nozzle portion, the transition portion is connected to the transmission portion, and the main flow channel is connected to the transition flow channel; The included angle between the second direction X2 and the first direction X1 is α, 0≤α≤30.

2. The nozzle according to claim 1, characterized in that A portion of the first spray portion close to the transition portion is perpendicular to the transition portion, a portion of the first spray portion away from the transition portion is bent toward the second spray portion, a portion of the second spray portion close to the transition portion is perpendicular to the transition portion, and a portion of the second spray portion away from the transition portion is bent toward the first spray portion.

3. The nozzle according to claim 1, characterized in that The transition portion is connected to the transmission portion at one side away from the track groove, the transmission portion has a midplane A along the first direction X1 and parallel to the thickness direction of the nozzle, the spray rod is symmetrical about the midplane A, the nozzle has a midplane B along the second direction X2 and parallel to the thickness direction of the nozzle, the nozzle is symmetrical about the midplane B, and the spacing between the midplane A and the midplane B and the cross-section of the nozzle is L1 mm, 0≤L1≤2.

4. The nozzle according to claim 3, characterized in that Along the first direction X1, the transition part is connected to the end of the transmission part, and the side of the transition part away from the track groove is made of soft rubber material; or, the transmission part is connected to the side of the transition part away from the track groove, and along the direction perpendicular to the first direction X1, the side of the transmission part away from the track groove is made of soft rubber material.

5. The nozzle according to claim 3, characterized in that The end of the transmission part close to the nozzle is made of soft rubber material, and the end of the transmission part close to the nozzle rotates relative to the nozzle along the width direction of the second nozzle part.

6. The nozzle according to claim 5, characterized in that A plurality of material reducing grooves are provided on the outer surface of the end of the transmission part close to the nozzle in the width direction of the second nozzle part, so that the nozzle can rotate relative to the transmission part through the material reducing grooves.

7. The nozzle according to claim 6, characterized in that The material reduction groove extends along a third direction, and the third direction is perpendicular to the first direction X1.

8. The nozzle according to claim 6, characterized in that The transmission portion has a midplane A along the first direction X1 and parallel to the thickness direction of the nozzle, the spray rod is symmetrical about the midplane A, the multiple material reduction grooves are symmetrically distributed about the midplane A, and / or any side of the midplane A includes at least two of the material reduction grooves, and at least two of the material reduction grooves on any side are arranged at intervals in the first direction X1.

9. The nozzle according to claim 8, characterized in that The spacing between the material reducing grooves arranged at intervals in the first direction X1 is smaller than the width of the material reducing grooves along the first direction X1.

10. The nozzle according to claim 1, characterized in that The axis of the main flow channel outlet passes through the middle of the transition flow channel in the extending direction.

11. The nozzle according to claim 1, characterized in that Along a direction perpendicular to the first direction X1, a distance from the bottom of the track groove to a side of the transmission portion away from the nozzle is L2 mm, 8≤L2≤14.

12. The nozzle according to claim 3, characterized in that The plug-in portion extends along a straight line, the transmission portion extends along an arc, the plug-in portion is symmetrical about the midplane A, and the transmission portion is symmetrical about the midplane A; or The plug-in portion extends along a straight line, the transmission portion extends along a straight line, the plug-in portion is symmetrical about the midplane A, and the transmission portion is symmetrical about the midplane A; or The plug-in portion extends in a straight line, and the transmission portion is composed of multiple sections connected at angles to each other along the extension direction of the midplane A, so that the spray boom is extended in a fold line.

13. The nozzle according to claim 1, characterized in that The length of the first spray portion is L3 mm, 3≤L3≤8, and the length of the second spray portion is L4 mm, 3≤L4≤8.

14. The nozzle according to claim 1, characterized in that In the direction from the first nozzle to the second nozzle, the axis of the first nozzle is inclined away from the transition portion, and in the direction from the second nozzle to the first nozzle, the axis of the second nozzle is inclined away from the transition portion; or In the direction from the first nozzle to the second nozzle, the axis of the first nozzle is inclined toward the direction close to the transition portion, and in the direction from the second nozzle to the first nozzle, the axis of the second nozzle is inclined toward the direction close to the transition portion.

15. The nozzle according to claim 14, characterized in that The axis of the first nozzle and the axis of the second nozzle intersect to form an intersection C, and the distance between the intersection C and the first nozzle portion is greater than the distance between the intersection C and the second nozzle portion.

16. The nozzle according to claim 3, characterized in that The first nozzle and the second nozzle are opposite to each other, and at least one of the connecting lines of the first nozzle and the second nozzle is located in the same plane as the axis of the plug-in portion.

17. The nozzle according to claim 3, characterized in that A projection of the first nozzle on a plane perpendicular to the second direction X2 and a projection of the second nozzle on a plane perpendicular to the second direction X2 do not overlap.

18. The nozzle according to claim 1, characterized in that The distance between the first spray part and the second spray part is L5 mm, 8≤L5≤14.

19. The nozzle according to claim 1, characterized in that The first spray portion has a first inner surface and a first outer surface opposite to each other, the second spray portion has a second inner surface and a second outer surface opposite to each other, and the transition portion has a transition inner surface and a transition outer surface opposite to each other; The first inner surface, the transition inner surface, and the second inner surface are connected in a smooth transition sequence, or the first outer surface, the transition outer surface, and the second outer surface are connected in a smooth transition sequence.

20. The nozzle according to claim 1, characterized in that The width of at least the end portion of the first spray portion gradually decreases in a direction away from the transition portion, and the width of at least the end portion of the second spray portion gradually decreases in a direction away from the transition portion.

21. A dental flosser, characterized in that: include: A host and a nozzle according to any one of claims 1 to 20, wherein the nozzle is connected to the host.

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