Nozzle and oral irrigator thereof

Abstract

The spray nozzle comprises a spray rod and a spray head, the spray rod is provided with a spray rod flow channel, the spray head comprises a connecting part, a first side part and a second side part, and the connecting part is connected with one end of the spray rod and provided with a flow dividing channel communicated with the spray rod flow channel; the first side part extends from one end of the connecting part in the second extending direction and is provided with a first flow channel communicating with the flow dividing channel and a first inner side face, and the first flow channel forms a first liquid spraying opening in the first inner side face. The second side part extends from the other end of the connecting part in the second extending direction and is provided with a second flow channel communicating with the flow dividing channel and a second inner side face opposite to the first inner side face, the second flow channel forms a second liquid spraying opening in the second inner side face, and the connecting part, the first side part and the second side part form a containing cavity; according to the tooth cleaning device, the first liquid spraying opening and the second liquid spraying opening are formed in the mode that the first liquid spraying opening and the second liquid spraying opening are not right opposite to each other in the first extending direction, and the tooth cleaning efficiency of the nozzle is improved.

Description

Technical Field

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

[0002] An irrigator is an auxiliary tool for cleaning teeth by means of pulsed water flow. In order to achieve the cleaning effect on the inner and outer tooth surfaces of teeth, there is an irrigator with a U-shaped nozzle in the related technology. The U-shaped nozzle has two oppositely arranged water outlets. When using the irrigator, the liquid in the irrigator can be sprayed out from the two water outlets to clean the inner and outer tooth surfaces of the teeth. However, since the two water outlets are relatively arranged, the irrigator has a smaller flushing area for the inner and outer tooth surfaces of the teeth, which leads to lower flushing efficiency. Utility Model Content

[0003] The embodiment of the present application provides a nozzle and a water flosser thereof, aiming to improve the cleaning efficiency of the nozzle on teeth.

[0004] A first aspect of an embodiment of the present application provides a nozzle, which is applied to a water flosser and includes a spray rod and a nozzle, wherein the spray rod has a spray rod flow channel inside, and the nozzle includes a connecting portion, a first side portion, and a second side portion, wherein the connecting portion is connected to one end of the spray rod and has a flow diversion channel connected to the spray rod flow channel, wherein the connecting portion extends along a first extension direction; the first side portion extends from one end of the connecting portion along a second extension direction, and has a first flow channel connected to the flow diversion channel, wherein the first side portion has a first inner side surface, and the first flow channel forms a first liquid spray port on the first inner side surface, wherein the second extension direction is parallel to the first extension direction. The second side portion extends from the other end of the connecting portion along the second extending direction, and has a second flow channel connected to the diversion channel. The second side portion is spaced apart from and arranged opposite to the first side portion, so that the connecting portion, the first side portion and the second side portion constitute an accommodating cavity for accommodating teeth. The second side portion has a second inner side surface arranged opposite to the first inner side surface, and the second flow channel forms a second liquid spraying port on the second inner side surface; wherein the first liquid spraying port and the second liquid spraying port are both arranged toward the accommodating cavity, and along the first extending direction, the first liquid spraying port and the second liquid spraying port are not arranged opposite to each other.

[0005] Further, when projected along the first extension direction, the projection of the first liquid ejection port at least partially does not overlap with the projection of the second liquid ejection port in the second extension direction.

[0006] Furthermore, the projection of the first liquid spray port and the projection of the second liquid spray port are spaced apart in the second extension direction, or the projection of the first liquid spray port and the projection of the second liquid spray port are spaced apart in the second extension direction, and the distance between the projection of the first liquid spray port and the projection of the second liquid spray port in the second extension direction is less than or equal to 5 mm.

[0007] Furthermore, when projected along the first extension direction, the projection of the first liquid spraying port and the projection of the second liquid spraying port at least partially do not overlap in a third direction, wherein the third direction is perpendicular to the first extension direction and the second extension direction.

[0008] Furthermore, the projection of the first liquid spray port and the projection of the second liquid spray port are spaced apart in the third direction; or, the projection of the first liquid spray port and the projection of the second liquid spray port are spaced apart in the third direction, and the distance between the projection of the first liquid spray port and the projection of the second liquid spray port in the third direction is less than or equal to 5 mm.

[0009] Furthermore, the center dividing surface of the first side portion is coplanar with the center dividing surface of the second side portion, so that the first side portion and the second side portion are arranged opposite each other; or, along the first extension direction, the first side portion and the second side portion are not arranged opposite each other, and the first liquid spray outlet is arranged at the middle part of the first inner surface in the third direction, and the second liquid spray outlet is arranged at the middle part of the second inner surface in the third direction.

[0010] Furthermore, projecting along the first extension direction, the projection of the first liquid spraying port and the projection of the second liquid spraying port at least partially do not overlap in the second extension direction and a third direction, wherein the third direction is perpendicular to the first extension direction and the second extension direction.

[0011] Furthermore, the projection of the first liquid spraying port and the projection of the second liquid spraying port are arranged at intervals in the second extending direction and the third direction.

[0012] Further, the spacing between the first inner side surface and the second inner side surface in the first extension direction is greater than or equal to 8 mm, wherein the central axis of the first liquid spray outlet is set at an angle to the length direction of the spray rod and the second extension direction; and / or the central axis of the second liquid spray outlet is set at an angle to the length direction of the spray rod and the second extension direction.

[0013] Furthermore, a center dividing plane of the first side portion is coplanar with a center dividing plane of the second side portion, wherein a center axis of the first liquid spraying port and a center axis of the second liquid spraying port are both parallel to the center dividing plane.

[0014] Furthermore, the connecting portion includes an inner connecting surface, which is connected to the first inner side surface and the second inner side surface; and the spacing between the inner connecting surface and the first liquid spraying port and the second liquid spraying port in the second extension direction is greater than or equal to 3 mm.

[0015] Further, the first extension direction is parallel to the length direction of the spray rod, and the first side portion is farther away from the other end of the spray rod than the second side portion, and the first spray port and the second spray port are used to clean the inner tooth surface and the outer tooth surface, respectively; wherein, along the second extension direction, the first side portion has a first length relative to the connecting portion, and the second side portion has a second length relative to the connecting portion, and the first length is smaller than the second length.

[0016] Further, the first liquid spray port is arranged close to the free end of the first side portion, and the second liquid spray port is arranged close to the free end of the second side portion, wherein the central axis of the first liquid spray port intersects with the central axis of the second liquid spray port at a first intersection.

[0017] Further, the first liquid spray port is arranged near the free end of the first side portion, and the second liquid spray port is arranged near the free end of the second side portion, and the central axis of the first liquid spray port intersects with the central axis of the second liquid spray port at a first intersection; wherein, the central axis of the first liquid spray port has a first angle with the second extension direction, and the central axis of the second liquid spray port has a second angle with the second extension direction, and the first angle is less than or equal to the second angle, so that the first intersection is closer to the second side portion.

[0018] Furthermore, when projected along the first extension direction, the projection of the first liquid spraying port is spaced apart from the projection of the second liquid spraying port, and the distance between the projection of the first liquid spraying port and the second liquid spraying port is less than or equal to 3 mm.

[0019] Furthermore, the spray rod flow channel has a liquid outlet for communicating with the diversion channel, and in the extension direction, the liquid outlet is closer to the second side portion than the first side portion, so that the distance from the liquid outlet to the first liquid spray port is equal to the distance from the liquid outlet to the second liquid spray port.

[0020] Furthermore, the nozzle is a soft rubber part and is projected along the first extension direction. The projection of the first liquid spray port and the projection of the second liquid spray port are spaced apart in the second extension direction, and the first liquid spray port is arranged close to the free end of the first side portion, and in the second extension direction, the second liquid spray port is arranged closer to the middle of the second inner side surface than the first liquid spray port.

[0021] Furthermore, a distance between the first inner side surface and the second inner side surface in the first extension direction is greater than or equal to 8 mm and less than or equal to 14 mm.

[0022] A second aspect of an embodiment of the present application provides a water flosser, which includes a main body and a nozzle as described above, wherein the main body includes a water tank, the other end of the spray rod is connected to the main body, and the spray rod flow channel is connected to the water tank.

[0023] An embodiment of the present application provides a nozzle and a water flosser, wherein the nozzle is applied to the water flosser, wherein the first side portion has a first flow channel and a first inner side surface, and the first flow channel forms a first liquid spray port on the first inner side surface, and the second side portion has a second flow channel and a second inner side surface arranged opposite to the first inner side surface, and the second flow channel forms a second liquid spray port on the second inner side surface, wherein the first liquid spray port and the second liquid spray port are both arranged toward the accommodating cavity, and the first liquid spray port and the second liquid spray port are not arranged directly opposite to each other along the first extension direction, when the nozzle is extended into the oral cavity to clean the teeth, the first liquid spray port and the second liquid spray port can clean different parts of the teeth at the same time, for example, the inner and outer tooth surfaces of the teeth, the gaps between the teeth, etc., thereby improving the cleaning efficiency of the nozzle on the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the structure of a water flosser in one embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of the exploded structure of a nozzle in one embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the structure of a nozzle in one embodiment of the present application;

[0028] Figure 4 This is a schematic structural diagram of a nozzle in an embodiment of the present application from another perspective;

[0029] Figure 5 for Figure 4 The schematic diagram of the cross-sectional structure of the nozzle shown along the DD section;

[0030] Figure 6 This is a schematic diagram of the structure of a nozzle in another embodiment of the present application;

[0031] Figure 7 This is a schematic structural diagram of a nozzle in another embodiment of the present application;

[0032] Figure 8 This is a schematic diagram of the structure of a nozzle in another embodiment of the present application;

[0033] Fig. 9 This is a schematic diagram of the structure of a nozzle in one embodiment of the present application;

[0034] Fig.10 for Fig. 9 The schematic diagram of the cross-sectional structure of the nozzle shown is along the EE section;

[0035] Fig.11 This is a schematic structural diagram of the nozzle from another perspective in an embodiment of the present application.

[0036] Explanation of the reference numerals: 1-water flosser; 10-nozzle; 11-spray rod; 11a-spray rod flow channel; 11b-liquid outlet; 12-spray head; 12a-accommodating chamber; 12b-first intersection; 121-connecting portion; 121a-diverter channel; 121b-inner connecting surface; 122-first side portion; 122a-first flow channel; 122b-first inner side surface; 122c-first liquid spray outlet; 122d-central axis of the first liquid spray outlet; 123-second side portion; 123a-second flow channel; 123b-second inner side surface; 123c-second liquid spray outlet; 123d-central axis of the second liquid spray outlet; 20-main body. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] See also Figure 1 An embodiment of the present application provides a water flosser 1 , which includes a nozzle 10 and a main body 20 .

[0039] Specifically, the main body 20 includes a water tank and a main unit (neither of which is shown in the figure), and the liquid flowing out of the water tank is pressurized by the main unit, and the pressurized liquid is sprayed out through the nozzle 10 to form a pulsed water column to clean the user's teeth, wherein the nozzle 10 can be detachably connected to the main unit, or can be non-detachably connected to the main unit, and the nozzle 10 is connected to the main unit to receive the liquid pressurized by the main unit, and spray the pressurized liquid toward the user's teeth to achieve the effect of cleaning the teeth. According to the structure of the oral cavity, teeth generally include incisors, canines, and molars, whose thickness increases in sequence from the inner and outer directions of the teeth, and the nozzle 10 of the embodiment of the present application can clean the incisors, canines, and molars.

[0040] See also Figure 2 In some embodiments, the nozzle 10 includes a spray bar 11 and a spray head 12 .

[0041] Specifically, one end of the spray rod 11 is connected to the nozzle 12, and the other end of the spray rod 11 is connected to the main body 20, and both are connected to the main body 20 and the nozzle 12. In order to realize the transmission of liquid in the water flosser 1, the spray rod 11 has a spray rod flow channel 11a inside, and the spray rod flow channel 11a is used to transmit the liquid transmitted from the main body 20 to the nozzle 12, and then the nozzle 12 forms a pulsed water column with the liquid transmitted from the spray rod flow channel 11a to the user's teeth to achieve the cleaning of the teeth. Optionally, the spray rod 11 is detachably connected to the main body 20, such as a snap connection, a threaded connection, or a magnetic connection, etc., and this application example does not specifically limit this.

[0042] See also Figure 3-Figure 5 Further, the nozzle 12 includes a connecting portion 121, a first side portion 122, and a second side portion 123. The connecting portion 121 is connected to one end of the spray rod 11, and the connecting portion 121 extends along the first extension direction AA, and the connecting portion 121 has a diverter channel 121a, and the diverter channel 121a is connected to the spray rod flow channel 11a. The first side portion 122 extends from one end of the connecting portion 121 along the second extension direction BB, and the first side portion 122 has a first flow channel 122a connected to the diverter channel 121a. The second side portion 123 extends from the other end of the connecting portion 121 along the second extension direction BB, and the second side portion 123 has a second flow channel 123a connected to the diverter channel 121a, and the second side portion 123 is spaced apart from the first side portion 122 and arranged oppositely, so that the connecting portion 121, the first side portion 122, and the second side portion 123 constitute a receiving cavity 12a for receiving teeth, wherein the first extension direction AA is perpendicular to the second extension direction BB.

[0043] Specifically, the flow channel of the spray rod 11a transfers the liquid in the water tank in the main body 20 to the diversion channel 121a, and the diversion channel 121a then diverts the liquid in the spray rod flow channel 11a to the first flow channel 122a and the second flow channel 123a, so that the first side portion 122 and the second side portion 123 can clean the teeth. The accommodating cavity 12a formed by the connecting portion 121, the first side portion 122 and the second side portion 123 can be a regular accommodating cavity 12a or an irregular accommodating cavity 12a, and the embodiments of the present application are not limited to this.

[0044] Furthermore, the first side portion 122 has a first inner side surface 122b, and the first flow channel 122a is formed with a first liquid spray outlet 122c on the first inner side surface 122b; the second side portion 123 has a second inner side surface 123b arranged opposite to the first inner side surface 122b, and the second flow channel 123a is formed with a second liquid spray outlet 123c on the second inner side surface 123b, the first liquid spray outlet 122c and the second liquid spray outlet 123c are both arranged toward the accommodating cavity 12a, and along the first extension direction AA, the first liquid spray outlet 122c and the second liquid spray outlet 123c are not arranged directly opposite each other.

[0045] Specifically, the shunt channel 121a is connected to the first flow channel 122a and the first liquid spraying port 122c, and the shunt channel 121a is also connected to the second flow channel 123a and the second liquid spraying port 123c. It can be understood that the shunt channel 121a shunts the liquid received from the spray bar flow channel 11a to the first flow channel 122a in the first side portion 122 and the second flow channel 123a in the second side portion 123, and the first liquid spraying port 122c and the second liquid spraying port 123c are both arranged toward the accommodating cavity 12a, that is, the first side portion 122 and the second side portion 123 are arranged relative to each other, and the nozzle 12 can clamp the inner tooth surface and the outer tooth surface of the tooth, and the first liquid spraying port 122c and the second liquid spraying port 123c can spray out pulsed water columns, thereby cleaning the teeth. The first inner side surface 122b and the second inner side surface 123b can be a plane or a curved surface, which is not limited in the embodiment of the present application.

[0046] It should be noted that the first extension direction AA can be parallel to or angled with the length direction of the spray bar 11 , and the present application does not specifically limit the first extension direction AA and the length direction of the spray bar 11 .

[0047] Furthermore, the first liquid spray port 122c and the second liquid spray port 123c can be arranged non-oppositely along the first extension direction AA. It can be understood that when the nozzle 12 is inserted into the oral cavity to clean the teeth, the first liquid spray port 122c and the second liquid spray port 123c are staggered along the first extension direction AA, that is, the liquid sprayed from the first liquid spray port 122c and the liquid sprayed from the second liquid spray port 123c do not overlap in the first extension direction AA. The first liquid spray port 122c and the second liquid spray port 123c have a larger cleaning area for the teeth, that is, the first liquid spray port 122c and the second liquid spray port 123c can clean different parts of the teeth at the same time, thereby improving the cleaning efficiency of the nozzle 10 for the teeth.

[0048] See also Figure 6 In some embodiments, projection is performed along the first extension direction AA, and the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c at least partially do not overlap in the second extension direction BB. It can be understood that the first liquid spray port 122c and the second liquid spray port 123c can be staggered in the second extension direction BB. When the nozzle 12 is extended into the oral cavity to clean the teeth, the first liquid spray port 122c and the second liquid spray port 123c are staggered in the second extension direction BB, that is, the water column sprayed by the first liquid spray port 122c and the water column sprayed by the second liquid spray port 123c can clean different teeth at the same time, so that the cleaning area of ​​the nozzle 12 for the teeth is increased, and the first liquid spray port 122c and the second liquid spray port 123c can be extended into the teeth to clean the tooth gaps. In this way, the cleaning area of ​​the nozzle 10 is increased, thereby improving the cleaning efficiency of the nozzle 10 for the teeth.

[0049] Please continue reading Figure 6 Furthermore, in some embodiments, the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c are spaced apart in the second extension direction BB, that is, the first liquid spray port 122c and the second liquid spray port 123c are staggered in the second extension direction BB, so that the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c are spaced apart in the second extension direction BB, so when the nozzle 12 cleans the interdental spaces between teeth, the water column sprayed from the first liquid spray port 122c and the water column sprayed from the second liquid spray port 123c are not on the same straight line, that is, the nozzle 12 can clean different interdental spaces at the same time, thereby improving the cleaning effect of the nozzle 10 on the teeth.

[0050] Please continue reading Figure 6Furthermore, in some other embodiments, the spacing d1 between the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c in the second extension direction BB is less than or equal to 5 mm. For example, the spacing d3 between the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c in the second extension direction BB can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. The spacing d1 between the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c in the second extension direction BB is designed to be less than or equal to 5 mm. It can be understood that on the basis of satisfying the staggered setting of the first liquid spray port 122c and the second liquid spray port 123c, the length of the first side portion 122 and the second side portion 123 will not be too long, and will be in line with the length adapted to the human oral cavity. When the nozzle 12 is inserted into the oral cavity to clean the teeth, there will be no strong foreign body sensation in the oral cavity. In this way, the comfort of the nozzle 10 for cleaning the teeth is improved.

[0051] When the distance d1 between the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c in the second extension direction BB is greater than 5 mm, the distance between the first liquid spray port 122c and the second liquid spray port 123c in the second extension direction BB is large, which will cause the length of the first side portion 122 and the second side portion 123 to be longer, that is, the overall length of the nozzle 12 is longer. When the nozzle 10 is extended into the oral cavity, due to the long lengths of the first side portion 122 and the second side portion 123, the teeth may easily block the nozzle 10, making it difficult for the nozzle 10 to extend into the oral cavity to clean the teeth, or the nozzle 10 is difficult to be taken out of the oral cavity. In particular, when the first side portion 122 and the second side portion 123 are spaced apart from each other, the nozzle 10 may be easily blocked by the teeth. When the lengths of the side portions 123 are inconsistent, for example, in the second extension direction BB, the length of the first side portion 122 is smaller than the length of the second side portion 123. Since the distance d1 between the projection of the first spray port 122c and the projection of the second spray port 123c in the second extension direction BB is relatively large, when the second spray port 123c of the second side portion 123 is blocked by the teeth and does not extend under the teeth, the first spray port 122c of the first side portion 122 may not be able to clean the tooth surface, that is, the water column sprayed from the first spray port 122c of the first side portion 122 can be sprayed toward the inner wall of the oral cavity unimpeded, causing damage to the inner wall of the oral cavity and posing certain safety hazards.

[0052] See also Figure 7In some embodiments, the projection of the first liquid jet port 122c and the projection of the second liquid jet port 123c do not overlap at least partially in the third direction CC. It can be understood that the first liquid jet port 122c and the second liquid jet port 123c are on the left and right sides of the third direction CC. At this time, the first liquid jet port 122c and the second liquid jet port 123c are staggered. When the nozzle 12 cleans the gaps between teeth, because the projection of the first liquid jet port 122c and the projection of the second liquid jet port 123c do not overlap at least partially in the third direction CC, the first liquid jet port 122c and the second liquid jet port 123c can clean the tooth surface of the tooth while cleaning the gaps between teeth, so that the nozzle 12 can clean the dental plaque on the teeth more comprehensively, thereby improving the cleaning effect of the nozzle 10 on the teeth. Among them, the third direction CC is perpendicular to the first extension direction AA and the second extension direction BB.

[0053] Please continue reading Figure 7 Furthermore, in some embodiments, the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c are spaced apart in the third direction CC, that is, the first liquid spray port 122c and the second liquid spray port 123c are staggered in the third direction CC, so that the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c are spaced apart in the third direction CC, so when the nozzle 12 cleans the gaps between teeth, the water columns sprayed from the first liquid spray port 122c and the second liquid spray port 123c can clean the tooth surfaces of the teeth, and at the same time, when the nozzle 12 moves back and forth along the extension direction of the teeth, it can be more biased towards the nozzle 10 to clean the dental plaque on the tooth surfaces more comprehensively, thereby improving the cleaning effect of the nozzle 10 on the teeth.

[0054] Please continue reading Figure 7 In some other embodiments, the distance d2 between the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c in the third direction CC is less than or equal to 5 mm. For example, the distance d3 between the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c in the third direction CC can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. Since the distance d2 between the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c in the third direction CC is less than or equal to 5 mm, the width of the first side portion 122 and the second side portion 123 in the third direction CC is more suitable for extending into the oral cavity, which can avoid a strong foreign body sensation in the oral cavity, thereby improving the comfort of the oral irrigator 1.

[0055] When the distance d2 between the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c in the third direction CC is greater than 5 mm, the width dimensions of the first side portion 122 and the second side portion 123 in the third direction CC need to be made larger to satisfy the requirement that the distance d2 between the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c in the third direction CC is greater than 5 mm. At this time, the overall width of the nozzle 12 is likely to be wider. When the nozzle 12 is inserted into the oral cavity to clean the teeth, due to the larger width dimensions of the first side portion 122 and the second side portion 123 in the third direction CC, the contact area between the first side portion 122 and the second side portion 123 and the inner wall of the oral cavity is increased, resulting in a stronger foreign body sensation.

[0056] See also Figure 8 In some embodiments, the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c do not overlap at least partially in the second extension direction BB and the third direction CC. It can be understood that the first liquid spray port 122c and the second liquid spray port 123c are staggered in the second extension direction BB and the third direction CC. When the nozzle 12 is extended into the oral cavity to clean the teeth, since the first liquid spray port 122c and the second liquid spray port 123c are staggered in the second extension direction BB and the third direction CC, the first liquid spray port 122c and the second liquid spray port 123c can clean the tooth surface of the same tooth, and can clean the tooth surfaces and tooth gaps of adjacent teeth. In this way, the cleaning efficiency of the nozzle 10 for the teeth is improved.

[0057] Please continue reading Figure 8 Furthermore, in some embodiments, the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c are both spaced apart in the second extension direction BB and the third direction CC, that is, the first liquid spray port 122c and the second liquid spray port 123c are both staggered in the second extension direction BB and the third direction CC, so that the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c are both spaced apart in the second extension direction BB and the third direction CC. Therefore, when the nozzle 12 cleans the teeth, the first liquid spray port 122c and the second liquid spray port 123c can spray to clean the tooth surface and tooth gap above and below the same tooth, and can also clean the tooth gap area of ​​adjacent teeth, so as to increase the cleaning area of ​​the teeth by the nozzle 12, thereby improving the cleaning efficiency of the nozzle 10 for the teeth.

[0058] In some embodiments, based on the projection along the first extension direction AA, the projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c at least partially do not overlap in the third direction CC, and the center dividing plane of the first side portion 122 and the center dividing plane of the second side portion 123 are coplanar, so that the first side portion 122 and the second side portion 123 are arranged opposite to each other. It can be understood that the first side portion 122 and the second side portion 123 share the same center dividing plane. At this time, the first side portion 122 and the second side portion 123 are respectively arranged at both ends of the connecting portion 121 and are relatively symmetrically arranged. When the user needs to take the nozzle 12 out of the oral cavity, because the first side portion 122 and the second side portion 123 are relatively symmetrically arranged, the accommodating cavity 12a has a larger space, and it is not easy to cause squeezing on the inner and outer tooth surfaces of the teeth, which facilitates the removal of the nozzle 10 from the oral cavity, thereby avoiding the nozzle 10 from being stuck with the teeth.

[0059] Further, in some other embodiments, along the first extension direction AA, the first side portion 122 and the second side portion 123 are not arranged opposite to each other, and the first liquid spraying port 122c is arranged at the middle of the first inner side surface 122b in the third direction CC, and the second liquid spraying port 123c is arranged at the middle of the second inner side surface 123b in the third direction CC. It can be understood that the first side portion 122 and the second side portion 123 are staggered along the first extension direction AA. At this time, because the first side portion 122 and the second side portion 123 are staggered, when the first liquid spraying port 122c is arranged at the middle of the first inner side surface 122b in the third direction CC, the second liquid spraying port 123c is arranged When the second inner side surface 123b is in the middle of the third direction CC, the first liquid spray port 122c and the second liquid spray port 123c are also staggered, and the first liquid spray port 122c and the second liquid spray port 123c are both arranged in the middle of their respective inner side surfaces in the third direction CC, so that the width of the nozzle 12 in the third direction CC is more uniform and suitable for extending into the oral cavity to reduce the width of the first side portion 122 and the first side portion 122 in the third direction CC, thereby reducing the contact area between the first side portion 122 and the second side portion 123 and the inner wall of the oral cavity, thereby avoiding a strong foreign body sensation between the first side portion 122 and the second side portion 123 and the inner wall of the oral cavity.

[0060] See also Figure 9-10 In some embodiments, a distance d3 between the first inner side surface 122b and the second inner side surface 123b in the first extension direction AA is greater than or equal to 8 mm, wherein at least one of the central axis 122d of the first liquid spray port 122c or the central axis 123d of the second liquid spray port is set at an angle with the length direction of the spray rod 11 and the second extension direction BB. It can be understood that at least one of the first liquid spray port 122c and the second liquid spray port 123c can be set at an angle, and the inclination direction is away from the connecting portion 121.

[0061] For example, when the central axis 122d of the first liquid spraying port is set at an angle with the length direction of the spray rod 11 and the second extension direction BB, when the nozzle 12 is extended into the oral cavity to clean the teeth, because the distance d3 between the first inner side surface 122b and the second inner side surface 123b in the first extension direction AA is greater than or equal to 8mm, that is, the distance d3 between the accommodating cavity 12a in the first extension direction AA is greater than 8mm, the accommodating cavity 12a can accommodate teeth of different thicknesses, so that the nozzle 12 can move back and forth in the thickness direction of the teeth, and based on the The cleaning height of the tooth surface by the first liquid spray port 122c and the second liquid spray port 123c is adjusted according to the distance that the nozzle 12 moves in the thickness direction of the tooth. That is, the user moves the spray rod 11 up and down with his hand as the axis, so that the nozzle 12 can move in the thickness direction of the tooth, and the first liquid spray port 122c is tilted away from the connecting part 121. In this way, during the movement of the nozzle 12 in the thickness direction of the tooth, the first liquid spray port 122c can clean different parts of the tooth, thereby improving the cleaning effect of the nozzle 10.

[0062] Please continue reading Figure 9-10 Further, in some embodiments, the center dividing plane of the first side portion 122 is coplanar with the center dividing plane of the second side portion 123, and the center axis 122d of the first liquid spray port and the center axis 123d of the second liquid spray port are both parallel to the center dividing plane. It can be understood that the center dividing plane can pass through or cut through the first liquid spray port 122c and the second liquid spray port 123c at the same time, and the center axis 122d of the first liquid spray port and the center axis 123d of the second liquid spray port are both parallel to the center dividing plane, that is, the first liquid spray port 122c and the second liquid spray port 123c are vertically arranged in the third direction CC. At this time, the water columns sprayed from the first liquid spray port 122c and the second liquid spray port 123c can be directly used to clean the gaps between the teeth, thereby improving the cleaning effect of the nozzle 10.

[0063] If the central axis 122d of the first liquid spray port and the central axis 123d of the second liquid spray port are not parallel to the median plane, since the tooth gap is located between adjacent teeth and the first liquid spray port 122c and the second liquid spray port 123c are inclined in the third direction CC, it is easy for the water columns sprayed from the first liquid spray port 122c and the second liquid spray port 123c to be blocked by the tooth surface of the teeth, resulting in the nozzle 12 being unable to clean the tooth gap, resulting in a reduced cleaning effect of the nozzle 10.

[0064] See also Fig.10In some embodiments, the connecting portion 121 includes an inner connecting surface 121b, the inner connecting surface 121b is connected to the first inner side surface 122b and the second inner side surface 123b, and the spacing d4 between the inner connecting surface 121b and the first liquid spraying port 122c and the second liquid spraying port 123c in the second extension direction BB is greater than or equal to 3mm. For example, the spacing between the inner connecting surface 121b and the first liquid spraying port 122c and the second liquid spraying port 123c in the second extension direction BB can be 3mm, 4mm, 5mm, or 6mm. When the nozzle 12 is clamped on the inner and outer tooth surfaces, the inner connecting surface 121 The spacing d4 between b and the first liquid spray port 122c and the second liquid spray port 123c in the second extension direction BB is greater than or equal to 3 mm. The first liquid spray port 122c and the second liquid spray port 123c can extend under the teeth. On the one hand, it can meet the needs of the nozzle 12 to clean the tooth gaps and improve the cleaning effect of the nozzle 10. On the other hand, it can meet the needs of the nozzle 12 to clamp the inner and outer tooth surfaces of the teeth. When the nozzle 12 cleans the teeth, the nozzle 12 will not be detached from the teeth due to the lack of clamping of the teeth by the accommodating cavity 12a, thereby improving the stability of the nozzle 12 clamping the teeth.

[0065] See also Figure 2 In some embodiments, the first extension direction AA is parallel to the length direction of the spray rod 11, and the first side portion 122 is farther away from the other end of the spray rod 11 than the second side portion 123. It can be understood that the first side portion 122 is relatively located at the top of the nozzle 12, and the first spray port 122c and the second spray port 123c are both arranged toward the accommodating cavity 12a. When the speed of the water column sprayed from the first spray port 122c is faster than that of the water column sprayed from the second spray port 123c, because the first side portion 122 is located at the top of the nozzle 12, the direction of the water column sprayed from the first spray port 122c is toward the accommodating cavity 12a, so the water column sprayed from the first spray port 122c is difficult to spray the human body, thereby improving the safety of using the water flosser 1.

[0066] See also Fig.11 Furthermore, the first liquid spray port 122c and the second liquid spray port 123c are used to clean the inner tooth surface and the outer tooth surface respectively, wherein along the second extension direction BB, the first side portion 122 has a first length L1 relative to the connecting portion 121, and the second side portion 123 has a second length L2 relative to the connecting portion 121, and the first length L1 is smaller than the second length L2.

[0067] Specifically, the first side portion 122 can be used to clean the inner tooth surface of the teeth, and the second side portion 123 can be used to clean the outer tooth surface of the teeth. When the user disengages the nozzle 12 from the teeth, the inner tooth surface of the teeth is more likely to clamp the first side portion 122 of the nozzle 12. According to the user's usage habits of the water flosser 1, the user moves the nozzle 12 with the hand as the axis. Because the first length L1 is less than the second length L2, the displacement of the first side portion 122 on the inner tooth surface is larger than the displacement of the second side portion 123 on the outer tooth surface. In this way, it is easy to remove the nozzle 12 from the oral cavity, that is, the nozzle 12 can be effectively prevented from being stuck with the teeth. The following is an example in which the first side portion 122 is used to clean the inner tooth surface of the teeth, and the second side portion 123 is used to clean the outer tooth surface of the teeth.

[0068] See also Fig.10 In some embodiments, the first liquid spray port 122c is arranged near the free end of the first side portion 122, and the second liquid spray port 123c is arranged near the free end of the second side portion 123. The central axis 122d of the first liquid spray port intersects with the central axis 123d of the second liquid spray port at a first intersection 12b. It can be understood that the water column sprayed from the first liquid spray port 122c can intersect with the water column sprayed from the second liquid spray port 123c at the first intersection 12b. When the nozzle 12 is extended into the oral cavity to clean the teeth, because the length of the first side portion 122 is less than the length of the second side portion 123, that is, the first side portion 122 is shorter than the second side portion 123, when cleaning the teeth, the first liquid spray port 122c of the first side portion 122 may not be blocked by the tooth surface of the teeth. If the user starts the water flosser 1 to clean the teeth at this time, it is easy to cause the first liquid spray port 122c to be blocked by the tooth surface of the teeth. The water column sprayed from a spray port 122c directly sprays the inner wall of the oral cavity. In particular, when the water flosser 1 is activated by the user without being inserted into the oral cavity, because the second side portion 123 is longer, that is, the water column sprayed from the second spray port 123c is not blocked by the first side portion 122, the water column sprayed from the second spray port 123c may be directly sprayed onto human tissues, especially onto vulnerable parts such as the eyes or nasal cavity, causing certain safety hazards to the user. Therefore, the central axis 122d of the first spray port and the central axis 123d of the second spray port are designed to intersect at the first intersection 12b. At this time, the water column sprayed from the first nozzle 122 may partially overlap with the water column sprayed from the second spray port 123c, thereby reducing the impact pressure of the first spray port 122c and the second spray port 123c. In this way, the safety of using the water flosser 1 can be improved.

[0069] Please continue reading Fig.10Further, in some embodiments, the central axis 122d of the first liquid spray port has a first angle α1 with the second extension direction BB, and the central axis 123d of the second liquid spray port has a second angle α2 with the second extension direction BB, and the first angle α1 is less than or equal to the second angle α2, so that the first intersection is closer to the second side portion 123, that is, the inclination angles of the first liquid spray port 122c and the second liquid spray port 123c are different, and because the first side portion 122 is used to clean the inner tooth surface, and the second side portion 123 is used to clean the outer tooth surface, at this time, the central axis 122d of the first liquid spray port and the central axis 123d of the second liquid spray port are The intersection 12b will be closer to the second side portion 123, and combined with the first length L1 being smaller than the second length L2, the length of the first side portion 122 is shorter. By designing the first angle α1 to be smaller than the second angle α2, not only the cleaning area of ​​the first spray port 122c on the inner tooth surface is increased, but also the first spray port is prevented from cleaning the inner gums. At the same time, because the length of the second side portion 123 is longer than that of the first side portion 122, the second angle α2 is designed to be greater than the first angle α1, that is, the inclination angle of the second spray port 123c is smaller than that of the first spray port 122c, so that the second spray port 123c can be prevented from cleaning the outer gums. If the first angle is greater than the second angle, the first intersection 12b of the central axis 122d of the first spray port and the central axis 123d of the second spray port will be closer to the first side portion 122, that is, closer to the inner tooth surface, which is easy to clean the gums and cause gum damage.

[0070] In some embodiments, the projection of the first liquid jet port 122c and the projection of the second liquid jet port 123c are arranged at intervals along the first extension direction AA, and the distance between the projection of the first liquid jet port 122c and the projection of the second liquid jet port 123c is less than or equal to 3mm. For example, the distance between the projection of the first liquid jet port 122c and the projection of the second liquid jet port 123c can be 1mm, 2mm, or 3mm. When the nozzle 12 is used to clean teeth, the length of the first side portion 122 is less than the length of the second side portion 123, which can be It is understood that the first liquid jet port 122c will spray water before the second liquid jet port 123c, so as to clean the inner tooth surface. However, because the distance between the projection of the first liquid jet port 122c and the projection of the second liquid jet port 123c is small, the second liquid jet port 123c can also spray water faster, so as to achieve the force of the first liquid jet port 122c and the second liquid jet port 123c on the inner and outer tooth surfaces of the same tooth or tooth gap to offset each other, and avoid excessive force on one side of the tooth or tooth gap, resulting in damage to the tooth, thus protecting the tooth. When the distance between the projection of the first liquid jet port 122c and the projection of the second liquid jet port 123c is greater than 3mm, it is possible that the first liquid jet port 122c has cleaned the inner tooth surface of the tooth, but the liquid of the second liquid jet port 123c is still flowing in the second flow channel 123a, which is easy to make the force on the tooth or tooth gap uneven, resulting in damage to the tooth or tooth gap.

[0071] See also Figure 5 In some embodiments, the spray bar flow channel 11a has a liquid outlet 11b for communicating with the diversion channel 121a. In the first extension direction AA, the liquid outlet 11b is closer to the second side portion 123 than the first side portion 122, so that the distance from the liquid outlet 11b to the first liquid spraying port 122c is equal to the distance from the liquid outlet 11b to the second liquid spraying port 123c. It can be understood that since the length of the first side portion 122 is less than the length of the second side portion 123, if the distance from the liquid outlet 11b to the first side portion 122 is equal to the distance from the second side portion 123, at this time, the first liquid spraying port 122c may be ahead of the second liquid spraying port 123c. 23c sprays out a water column, but the liquid in the second liquid outlet 123c still flows in the second flow channel 123a, which may easily cause uneven force on the teeth or the gaps between the teeth, resulting in damage to the teeth or the gaps between the teeth. Therefore, the liquid outlet 11b is designed to be closer to the second side portion 123 than the first side portion 122, so that the distance from the liquid outlet 11b to the first liquid outlet 122c is equal to the distance from the liquid outlet 11b to the second liquid outlet 123c, that is, the first liquid outlet 122c and the second liquid outlet 123c can spray water columns to clean the teeth at the same time. In this way, it can not only protect the teeth, but also improve the cleaning efficiency of the nozzle 10 on the teeth.

[0072] In some embodiments, the nozzle 12 is a soft rubber part and is projected along the first extension direction AA. The projection of the first liquid spray port 122c and the projection of the second liquid spray port 123c are arranged at intervals in the second extension direction BB, and the first liquid spray port 122c is arranged close to the free end of the first side portion 122, and in the second extension direction BB, the second liquid spray port 123c is arranged closer to the middle of the second inner side surface 123b than the first liquid spray port 122c.

[0073] Specifically, the nozzle 12 is a soft rubber part, that is, when the user moves the spray rod 11, the first side portion 122 and the second side portion 123 can be deformed, and because the first side portion 122 is shorter than the second side portion 123, the deformation force on the first side portion 122 will be smaller than the deformation force on the second side portion 123, but the first liquid spray port 122c is arranged close to the free end of the first side portion 122, and the second liquid spray port 123c is closer to the middle of the second inner side surface 123b than the first liquid spray port 122c. When the inner and outer tooth surfaces of the teeth are rinsed with a pulsed water column, because the first liquid spray port 122c is arranged at the free end of the first side portion 122, the first side portion 122 can be more easily deformed, thereby improving the deformation ability of the first side portion 122.

[0074] See also Fig.11In some embodiments, based on the nozzle 12 being a soft rubber part, the spacing d3 between the first inner side surface 122b and the second inner side surface 123b in the first extension direction AA is greater than or equal to 8 mm and less than or equal to 14 mm, that is, the spacing d3 between the accommodating cavity 12a in the first extension direction AA is greater than or equal to 8 mm and less than or equal to 14 mm. For example, the spacing d3 between the first inner side surface 122b and the second inner side surface 123b can be 8 mm, 10 mm, 12 mm, 13 mm, or 14 mm. At this time, the range of the spacing d3 is more compatible with the size of human teeth, which can not only improve the deformation capacity of the first side portion 122 and the second side portion 123, but also avoid the first side portion 122 and the second side portion 123. A strong foreign body sensation is generated between the one side portion 122 and the second side portion 123 and the inner wall of the oral cavity; when the distance d3 between the first inner side surface 122b and the second inner side surface 123b is less than 8mm, the first inner side surface 122b and the second inner side surface 123b will clamp the teeth too tightly, thereby weakening the deformation ability of the first side portion 122 and the second side portion 123; when the distance d3 between the first inner side surface 122b and the second inner side surface 123b is greater than 14mm, the accommodating cavity 12a of the nozzle 12 will be too large, and when the nozzle 12 is extended into the user's oral cavity, the first side portion 122 and the second side portion 123 will be clamped between the tooth surface and the inner wall of the oral cavity, which is easy to generate a strong foreign body sensation.

[0075] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0076] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A nozzle, characterized in that: Applied to a water flosser, the nozzle includes a spray rod and a spray head, the spray rod has a spray rod flow channel inside, and the spray head includes: A connecting portion connected to one end of the spray bar and having a flow diversion channel communicating with the spray bar flow channel, wherein the connecting portion extends along a first extension direction; a first side portion extending from one end of the connecting portion along a second extending direction, having a first flow channel communicating with the flow dividing channel, the first side portion having a first inner side surface, the first flow channel forming a first liquid spraying port on the first inner side surface, wherein the second extending direction is perpendicular to the first extending direction; a second side portion extending from the other end of the connecting portion along the second extending direction, having a second flow channel communicating with the diversion channel, the second side portion being spaced apart from and arranged opposite to the first side portion, so that the connecting portion, the first side portion and the second side portion constitute an accommodating cavity for accommodating teeth, the second side portion having a second inner side surface arranged opposite to the first inner side surface, and the second flow channel forming a second liquid spraying port on the second inner side surface; Wherein, the first liquid spraying port and the second liquid spraying port are both arranged toward the accommodating cavity, and along the first extending direction, the first liquid spraying port and the second liquid spraying port are not arranged directly opposite to each other.

2. The nozzle according to claim 1, characterized in that Projected along the first extension direction, the projection of the first liquid ejection port and the projection of the second liquid ejection port at least partially do not overlap in the second extension direction.

3. The nozzle according to claim 2, characterized in that The projection of the first liquid ejection port and the projection of the second liquid ejection port are spaced apart in the second extending direction; or, The projection of the first liquid ejection port and the projection of the second liquid ejection port are spaced apart in the second extension direction, and the distance between the projection of the first liquid ejection port and the projection of the second liquid ejection port in the second extension direction is less than or equal to 5 mm.

4. The nozzle according to claim 1, characterized in that Projected along the first extension direction, the projection of the first liquid ejection port and the projection of the second liquid ejection port at least partially do not overlap in a third direction, wherein the third direction is perpendicular to the first extension direction and the second extension direction.

5. The nozzle according to claim 4, characterized in that The projection of the first liquid ejection port and the projection of the second liquid ejection port are spaced apart in the third direction; or, The projection of the first liquid ejection port and the projection of the second liquid ejection port are spaced apart in the third direction, and the distance between the projection of the first liquid ejection port and the projection of the second liquid ejection port in the third direction is less than or equal to 5 mm.

6. The nozzle according to claim 4, characterized in that The middle dividing plane of the first side portion is coplanar with the middle dividing plane of the second side portion, so that the first side portion and the second side portion are arranged opposite to each other; or, Along the first extension direction, the first side portion and the second side portion are not arranged opposite each other, and the first liquid spraying port is arranged at the middle of the first inner side surface in the third direction, and the second liquid spraying port is arranged at the middle of the second inner side surface in the third direction.

7. The nozzle according to claim 1, characterized in that Projected along the first extension direction, the projection of the first liquid ejection port and the projection of the second liquid ejection port at least partially do not overlap in the second extension direction and a third direction, wherein the third direction is perpendicular to the first extension direction and the second extension direction.

8. The nozzle according to claim 7, characterized in that The projection of the first liquid ejection port and the projection of the second liquid ejection port are spaced apart in the second extending direction and the third direction.

9. The nozzle according to claim 1, characterized in that The distance between the first inner side surface and the second inner side surface in the first extension direction is greater than or equal to 8 mm, wherein the central axis of the first liquid spraying port is arranged at an angle with the length direction of the spray bar and the second extension direction; and / or, The central axis of the second liquid spraying port is arranged at an angle with the length direction of the spraying rod and the second extension direction.

10. The nozzle according to claim 9, characterized in that The center dividing plane of the first side portion is coplanar with the center dividing plane of the second side portion, wherein the center axis of the first liquid spraying port and the center axis of the second liquid spraying port are both parallel to the center dividing plane.

11. The nozzle according to claim 1, characterized in that The connecting portion includes an inner connecting surface, and the inner connecting surface is connected to the first inner side surface and the second inner side surface; Furthermore, the distances between the inner connecting surface and the first liquid spraying port and the second liquid spraying port in the second extending direction are both greater than or equal to 3 mm.

12. The nozzle according to claim 1, characterized in that The first extension direction is parallel to the length direction of the spray bar, and the first side portion is farther away from the other end of the spray bar than the second side portion, and the first liquid spray port and the second liquid spray port are used for cleaning the inner tooth surface and the outer tooth surface respectively; Wherein, along the second extension direction, the first side portion has a first length relative to the connecting portion, the second side portion has a second length relative to the connecting portion, and the first length is smaller than the second length.

13. The nozzle according to claim 12, characterized in that The first liquid spraying port is arranged near the free end of the first side portion, and the second liquid spraying port is arranged near the free end of the second side portion, wherein the central axis of the first liquid spraying port intersects with the central axis of the second liquid spraying port at a first intersection.

14. The nozzle according to claim 12, characterized in that The first liquid spraying port is disposed near the free end of the first side portion, the second liquid spraying port is disposed near the free end of the second side portion, and the central axis of the first liquid spraying port intersects the central axis of the second liquid spraying port at a first intersection; Wherein, the central axis of the first liquid spray port has a first angle with the second extension direction, the central axis of the second liquid spray port has a second angle with the second extension direction, and the first angle is less than or equal to the second angle, so that the first intersection is closer to the second side.

15. The nozzle according to claim 12, characterized in that Projected along the first extension direction, the projection of the first liquid ejection port is spaced apart from the projection of the second liquid ejection port, and the distance between the projection of the first liquid ejection port and the projection of the second liquid ejection port is less than or equal to 3 mm.

16. The nozzle according to claim 12, characterized in that The spray bar flow channel has a liquid outlet for communicating with the diversion channel. In the first extension direction, the liquid outlet is closer to the second side portion than the first side portion, so that the distance from the liquid outlet to the first spray port is equal to the distance from the liquid outlet to the second spray port.

17. The nozzle according to claim 12, characterized in that The nozzle is a soft rubber part and is projected along the first extension direction. The projection of the first liquid spray port and the projection of the second liquid spray port are spaced apart in the second extension direction, and the first liquid spray port is arranged close to the free end of the first side portion, and in the second extension direction, the second liquid spray port is arranged closer to the middle of the second inner side surface than the first liquid spray port.

18. The nozzle according to any one of claims 1 to 17, characterized in that A distance between the first inner side surface and the second inner side surface in the first extension direction is greater than or equal to 8 mm and less than or equal to 14 mm.

19. A water flosser, characterized in that: include: a main body, including a water tank; and, The nozzle according to any one of claims 1 to 18, wherein the other end of the spray rod is connected to the main body, and the spray rod flow channel is connected to the water tank.

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