Nozzle and oral irrigator comprising same

Abstract

Disclosed are a nozzle and an oral irrigator comprising same. The nozzle comprises: a spray rod, provided with a flow channel, wherein the spray rod is a rigid member; and a spray head, comprising a main flow part, a first branch flow part, and a second branch flow part, wherein the first branch flow part and the second branch flow part are spaced apart in an extending direction of the main flow part, and the first branch flow part and the second branch flow part are located on the same side of the main flow part. At least a part of the spray head is an elastic member. The spray head is configured into an integrated structure. The main flow part is connected to the spray rod. The main flow part is provided with a main flow channel, the first branch flow part is provided with a first branch flow channel, and the second branch flow part is provided with a second branch flow channel. The main flow channel is in communication with the flow channel, the first branch flow channel, and the second branch flow channel.

Description

Nozzle and oral irrigator having the same Technical Field

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

[0002] Water flossers commonly used in the past typically include a nozzle. This nozzle sprays water into the mouth for cleaning. Some nozzles have two outlets, allowing for simultaneous delivery of multiple streams of water. However, the complex flow path structure of these nozzles results in multiple assembly steps, hindering production efficiency.

[0003] Summary of the Invention

[0004] The purpose of the present application is to provide a nozzle which is an integrated structure and has the advantages of fewer assembly steps and high production efficiency.

[0005] In order to achieve the above-mentioned purpose, the first aspect embodiment of the present application provides a nozzle for use in a water flosser, comprising a spray rod provided with a flow channel, the spray rod being a hard part; a nozzle comprising a main flow portion, a first diversion portion and a second diversion portion, the first diversion portion and the second diversion portion being arranged at intervals along the extension direction of the main flow portion, and the first diversion portion and the second diversion portion being located on the same side of the main flow portion; wherein at least a portion of the nozzle is an elastic part, the nozzle is constructed as an integrated structure, the main flow portion is connected to the spray rod; the main flow portion is provided with a main flow channel, the first diversion portion is provided with a first diversion channel, the second diversion portion is provided with a second diversion channel, and the main flow channel is respectively connected to the flow channel, the first diversion channel and the second diversion channel.

[0006] The second aspect of the present application provides a water flosser, comprising: a main body; a nozzle according to the first aspect of the present application, wherein the spray rod is connected to the main body.

[0007] The nozzle of the oral irrigator in the embodiment of the present application adopts an integrated structure of the main flow part, the first diversion part and the second diversion part. The nozzle does not need to be reassembled, the production steps of the nozzle are reduced, the production efficiency is improved, and the sealing performance of the nozzle is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0009] FIG1 is a schematic structural diagram of a nozzle according to an embodiment of the present application;

[0010] FIG2 is a second structural schematic diagram of a nozzle according to an embodiment of the present application;

[0011] FIG3 is a cross-sectional view of a nozzle according to an embodiment of the present application;

[0012] FIG4 is a partial enlarged view of area A in FIG3 ;

[0013] FIG5 is a partial enlarged view of area B in FIG3 ;

[0014] FIG6 is a schematic diagram of the structure of a nozzle according to an embodiment of the present application;

[0015] FIG7 is a second structural diagram of the nozzle according to an embodiment of the present application;

[0016] FIG8 is a third structural diagram of the nozzle according to an embodiment of the present application;

[0017] FIG9 is an exploded view of a nozzle according to an embodiment of the present application;

[0018] FIG10 is a schematic diagram of a nozzle molding process according to an embodiment of the present application;

[0019] FIG11 is a second schematic diagram of the nozzle molding process according to an embodiment of the present application;

[0020] FIG12 is a third schematic diagram of the nozzle molding process according to an embodiment of the present application;

[0021] FIG13 is a fourth schematic diagram of the nozzle molding process according to an embodiment of the present application;

[0022] FIG14 is a fifth schematic diagram of the nozzle molding process according to an embodiment of the present application;

[0023] FIG15 is a sixth schematic diagram of the nozzle molding process according to an embodiment of the present application;

[0024] FIG16 is a seventh schematic diagram of the nozzle molding process according to an embodiment of the present application;

[0025] FIG. 17 is an eighth schematic diagram of the nozzle molding process according to an embodiment of the present application.

[0026] Description of Figure Numbers:

[0027] Spray head 1, spray rod 2, second stop step 3, first forming mold 4, needle-shaped mold 5, second forming mold 6;

[0028] Main flow portion 100, front surface 101, back surface 102, main flow channel 110, flow channel portion 120, connecting portion 130, sleeve hole 131, first stop step 132, process port 140;

[0029] The first flow diversion portion 200, the first flow diversion channel 210, the first flow guide channel 211, the first outlet channel 212, the first flow collecting section 213, the first transition section 214, the first pressure reducing section 215, and the first protrusion 220;

[0030] The second flow diversion portion 300, the second flow diversion channel 310, the second flow guide channel 311, the second outlet channel 312, the second flow collecting section 313, the second transition section 314, the second pressure reducing section 315, and the second protrusion 320;

[0031] The cover portion 400 and the flow channel 500 .

[0032] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of this application clearer, the following part will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0034] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0035] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0037] The water flosser in the related art has a U-shaped nozzle, which is used to clamp the inner and outer tooth surfaces of the teeth, and rinse the inner and outer tooth surfaces of the teeth on the basis of clamping. However, the U-shaped nozzle has multiple flow channels. Due to the special-shaped structure of the nozzle flow channel, the nozzle is set as a split structure, and the nozzle needs to be assembled twice, which has low production efficiency. For example, after the multiple parts of the U-shaped nozzle are produced, the multiple parts of the U-shaped nozzle are connected by bonding, clamping, etc. This kind of U-shaped nozzle has many production steps, and the connection strength between the multiple parts is low. When the temperature changes, gaps are likely to appear between the multiple parts, resulting in poor sealing, and problems such as water leakage may occur.

[0038] The oral irrigator of the embodiment of the present application adopts an integrated nozzle structure, which does not need to be reassembled. The production steps of the nozzle are reduced, which improves production efficiency. The nozzle also has better sealing performance and is not easily affected by changes in ambient temperature.

[0039] Exemplarily, as shown in Figures 1 to 3, the water flosser of the embodiment of the present application includes a main body (not shown in the figures) and a nozzle, and the nozzle includes a spray rod 2 and a nozzle 1. The spray rod 2 is connected to the main body, and the nozzle 1 is connected to the spray rod 2. The spray rod 2 can be made of hard materials such as hard plastic. The spray rod 2 is not easy to deform and can maintain its inherent shape. The main body can be detachably connected to the spray rod 2 or non-detachably connected to the spray rod 2. The main body is used for the user to hold, and a water tank, a water pump and other structures can be provided in the main body. The water pump can pump water from the water tank into the spray rod 2, and the fluid in the spray rod 2 is ejected outward through the nozzle 1 to form a pulsed water column to spray the user's teeth.

[0040] Among them, according to the structure of the oral cavity, teeth generally include incisors, canines and molars whose thickness increases successively in the inner and outer directions of the teeth. The nozzle 20 of the embodiment of the present application can spray and wash the incisors, canines and molars.

[0041] In some embodiments of the present application, the nozzle 1 and the spray bar 2 can be formed into an integral structure, that is, the main flow portion 100 of the nozzle 1 and the spray bar 2 can be formed into an integral structure. For example, the spray bar 2 is first formed, and then the spray bar 2 is placed in a mold, and the nozzle 1 is formed into an integral structure with the spray bar 2 in the mold; or the nozzle 1 is first formed, and then the nozzle 1 is placed in a mold, and the spray bar 2 is formed into an integral structure with the nozzle 1 in the mold. In this way, since the nozzle 1 and the spray bar 2 are formed into an integral structure, the sealing between the nozzle 1 and the spray bar 2 is better, which can reduce the probability of water leakage between the nozzle 1 and the spray bar 2. In addition, the connection strength between the nozzle 1 and the spray bar 2 is high, which is conducive to extending the service life.

[0042] In other embodiments of the present application, the nozzle 1 includes a rigid connector (not shown in the figure). The rigid connector can be made of a hard material such as hard plastic, so that the spray rod 2 is not easily deformed and can maintain its shape. The rigid connector can be formed into an integral structure with the main flow portion 100. The rigid connector can be made of a plastic material. The rigid connector and the spray rod 2 are connected, for example, by a threaded connection, a snap-fit ​​connection, or an adhesive connection.

[0043] The following describes the nozzle 1 according to an embodiment of the present application with reference to the accompanying drawings.

[0044] As shown in FIG. 2 and FIG. 3 , the nozzle 1 according to the embodiment of the present application includes a main flow portion 100 , a first branch flow portion 200 , and a second branch flow portion 300 .

[0045] The main flow section 100 is provided with a main flow channel 110. The first branching section 200 is connected to the main flow section 100 and is provided with a first branching channel 210, which is in communication with the main flow channel 110. The second branching section 300 is connected to the main flow section 100 and is provided with a second branching channel 310, which is in communication with the main flow channel 110. In this way, the nozzle 1 can spray water outward through the first branching channel 210 and the second branching channel 310 to simultaneously clean different areas of the oral cavity, thereby increasing the cleaning area, or simultaneously clean the same area of ​​the oral cavity, thereby increasing the flow rate of cleaning water.

[0046] The first diverter portion 200 and the second diverter portion 300 are arranged at intervals along the extension direction of the main flow portion 100, and are located on the same side of the main flow portion 100. In this way, the first diverter portion 200 and the second diverter portion 300 can clamp the teeth and rinse the inner and outer tooth surfaces while clamping.

[0047] Among them, at least a part of the nozzle 1 is an elastic part, that is, the nozzle 1 can be an elastic part as a whole, or at least a part of the main flow part 100 of the nozzle 1, the first diversion part 200 and the second diversion part 300 are elastic parts, and the nozzle 1 is constructed as an integrated structure.

[0048] The nozzle 1 constructs the main flow portion 100, the first diversion portion 200 and the second diversion portion 300 into an integrated structure. The nozzle 1 does not need to be reassembled, the production steps of the nozzle 1 are reduced, the production efficiency is improved, and the nozzle 1 has better sealing performance and is not easily affected by changes in ambient temperature.

[0049] Furthermore, at least a portion of the main flow section 100, the first diversion section 200, and the second diversion section 300 are elastic members, for example, made of silicone material. Silicone material is chemically stable and will not be corroded by saliva even after long-term oral use. For example, the silicone material can be edible silicone, which can prevent toxic substances from harming the human body. It is understood that the elastic material can also include other soft rubber materials, such as PE (polyethylene, abbreviated PE) and PP (polypropylene, abbreviated PP). Soft rubber materials can not only deform elastically but also protect teeth and gums from injury.

[0050] In addition, the main flow portion 100, the first diversion portion 200 and the second diversion portion 300 can undergo elastic deformation to adapt to teeth of different thicknesses. Teeth with thicker thickness can also be stuck between the first diversion portion 200 and the second diversion portion 300, and the nozzle 1 has a wider range of applications.

[0051] In addition, since the main stream portion 100, the first diversion portion 200 and the second diversion portion 300 are constructed as an integrated structure, the connection strength between the main stream portion 100, the first diversion portion 200 and the second diversion portion 300 is high, the service life is long, and the thickness of the main stream portion 100 can be reduced, thereby reducing the overall size of the main stream portion 100, the first diversion portion 200 and the second diversion portion 300 in the thickness direction of the main stream portion 100. When the nozzle is inserted into the mouth and clamped with the teeth, the back of the main stream portion 100 is not easy to interfere with the teeth, the nozzle is more comfortable to use, and the user experience is optimized.

[0052] As shown in FIG. 1 to FIG. 3 , the central axis of the main flow portion 100 is arranged to coincide with the central axis of the spray arm 2 of the oral irrigator.

[0053] In this way, the central axis of the flow channel 500 of the spray rod 2 and the central axis of the main channel 110 of the main part 100 can coincide with each other. When the fluid in the spray rod 2 flows to the main channel 110, the speed will not decay or the speed decay is extremely small, which is conducive to ensuring the water flow speed and water pressure of the fluid sprayed from the nozzle, and has a high cleaning force and a good cleaning effect on the oral cavity.

[0054] In addition, the central axis of the main flow portion 100 can also be arranged perpendicular to the central axis of the spray rod 2. In this way, after the spray rod 2 and the nozzle head 1 are connected, the overall size in the extension direction of the spray rod 2 is small, thereby reducing the length of the oral irrigator, which is conducive to realizing a short and compact design of the oral irrigator and making it easier to carry.

[0055] As shown in Figures 2 and 3, the main flow section 100 has a front face 101 and a back face 102 oppositely disposed. The front face 101 is connected to the first diversion section 200 and the second diversion section 300. Of the end face and the back face 102 at one end of the main flow section 100, one is open and connected to the spray boom 2, while the other is closed.

[0056] For example, when the central axis of the main stream section 100 coincides with the central axis of the spray rod 3, the main stream section 100 is provided with a socket hole 131 at one axial end thereof, and the socket hole 131 is open for connection with the spray rod 2, and the back side 102 of the main stream section 100 is provided with a process port 140, and the process port 140 is closed.

[0057] When the central axis of the main flow section 100 is arranged perpendicular to the central axis of the spray rod 3, the main flow section 100 is provided with a process port 140 at one axial end thereof, and the process port 140 is closed. The back side 102 of the main flow section 100 is provided with a socket hole 131, and the socket hole 131 is open for connection with the spray rod 2.

[0058] By providing the sleeve hole 131 and opening the sleeve hole 131 , the spray rod 2 can be inserted into the main flow portion 100 through the sleeve hole 131 to achieve connection between the spray rod 2 and the main flow portion 100 , and achieve communication between the main channel 110 and the flow channel 500 .

[0059] By setting the process port 140 , core pulling can be achieved during the process of forming the nozzle 1 , and the process port 140 is closed after the nozzle 1 is formed, which can prevent the fluid in the main channel 110 from leaking from the process port 140 and improve the sealing performance of the nozzle 1 .

[0060] As shown in Figure 2, when the central axis of the main flow section 100 coincides with the central axis of the spray boom 2, the main flow section 100 includes a flow channel portion 120 and a connecting portion 130. The flow channel portion 120 is connected to the first diverter portion 200 and the second diverter portion 300, respectively. The connecting portion 130 is connected to the flow channel portion 120 and the spray boom 2, respectively. The flow channel portion 120 and the connecting portion 130 are arranged along the extension direction of the main flow section 100.

[0061] The elastic deformation of the flow channel portion 120 adjusts the proximity or separation of the first diverter portion 200 and the second diverter portion 300, that is, adjusts the distance between the first diverter portion 200 and the second diverter portion 300 to accommodate different tooth shapes. The deformation of the connecting portion 130 adjusts the relative position between the flow channel portion 120 and the spray bar 2, for example, by adjusting the angle between the flow channel portion 120 and the spray bar 2, or adjusting the deflection angle between the flow channel portion 120 and the spray bar 2, thereby achieving the relative position between the first diverter portion 200 and the second diverter portion 300 and the spray bar 2. When the nozzle is inserted into the oral cavity at different positions, the positions of the first diverter portion 200 and the second diverter portion 300 can be adjusted, so that the first diverter portion 200 and the second diverter portion 300 can effectively clean different areas of the oral cavity.

[0062] As shown in Figures 6 and 9, the end of the connecting portion 130 facing the spray rod 2 is provided with a socket hole 131, the socket hole 131 is connected to the main channel 110, the spray rod 2 is inserted into the socket hole 131, and the spray rod 2 is sealed with the inner wall of the socket hole 131.

[0063] In this way, on the one hand, the positioning connection between the nozzle 1 and the spray rod 2 can be achieved. On the other hand, since the spray rod 2 is an elastic part, when the spray rod 2 is sealed with the inner wall of the sleeve hole 131, it can ensure that the spray rod 2 and the inner wall of the sleeve hole 131 are in elastic contact. The inner wall of the sleeve hole 131 can adaptively deform elastically according to the shape of the spray rod 2, thereby ensuring the tightness of the contact between the spray rod 2 and the inner wall of the sleeve hole 131, improving the sealing effect, and avoiding liquid leakage from between the nozzle 1 and the spray rod 2.

[0064] As shown in FIG3 and FIG6 , the inner wall of the sleeve hole 131 is provided with a first stop step 132 , and the outer peripheral surface of the spray rod 2 is provided with a second stop step 3 , and the first stop step 132 and the second stop step 3 abut against each other.

[0065] In this way, the depth of the spray rod 2 inserted into the socket hole 131 can be limited, avoiding the spray rod 2 from being excessively inserted into the socket hole 131, thereby ensuring that the overall size between the spray rod 2 and the nozzle 1 in the extension direction of the spray rod 2 is sufficient, which is conducive to enabling the nozzle to clean a wider range of the inside of the oral cavity and ensure the cleaning area.

[0066] As shown in FIG2 , the main flow portion 100 has a front face 101 and a back face 102 disposed opposite each other, with the front face 101 being connected to the first diverter portion 200 and the second diverter portion 300. In the width direction of the flow channel portion 120, the flow channel portion 120 is larger than the connecting portion 130, and the connecting portion 130 is connected to the back face 102 with an arc-shaped transition.

[0067] Exemplarily, the connecting portion 130 can be a cylindrical structure, so that the force on the connecting portion 130 is more uniform, the connecting portion 130 can have roughly the same elastic deformation ability in 360°, the structural strength of the connecting portion 130 is higher, and the probability of the connecting portion 130 being damaged by force deformation is reduced.

[0068] The main flow section 100 can be a flat structure, with the front 101 and the back 102 located on opposite sides of the thickness direction of the main flow section 100. The front 101 is used to face the area to be cleaned, such as the teeth. By connecting the connecting section 130 to the back 102, the cleaning effect of the nozzle on the oral cavity will not be affected by the connecting section 130, and the layout between the connecting section 130 and the first diversion section 200 and the second diversion section 300 will not interfere with each other.

[0069] In addition, due to the arc-shaped transition between the connecting portion 130 and the back surface 102 , stress concentration will not occur at the connection between the connecting portion 130 and the back surface 102 , so the probability of damage to the connection between the connecting portion 130 and the back surface 102 is low, thereby extending the service life of the nozzle 1 .

[0070] As shown in FIG3 , the cross-sectional area of ​​the first branch runner 210 gradually decreases and / or remains constant as it moves away from the main runner 110. The mold within the first branch runner 210 moves along the first branch runner 210 toward the main runner 110 during core pulling. This allows the mold within the first branch runner 210 to move smoothly during core pulling, preventing undercuts and facilitating core pulling.

[0071] As shown in FIG3 , the cross-sectional area of ​​the second branch runner 310 gradually decreases and / or remains constant as it moves away from the main runner 110. During core pulling, the mold within the second branch runner 310 moves along the second branch runner 310 toward the main runner 110. This allows for smooth movement of the mold within the second branch runner 310 during core pulling, preventing undercuts and facilitating core pulling.

[0072] As shown in FIG3 , the cross-sectional area of ​​the main channel 110 gradually decreases and / or remains constant as it moves away from the nozzle rod 2 of the oral irrigator. A needle-shaped mold 5 is inserted during the molding of the main channel 110 to define the shape of the main channel 110. After the main channel 110 is formed, the needle-shaped mold 5 needs to be removed and moved along the main channel 110 toward the nozzle rod 2. This allows the needle-shaped mold 5 to move smoothly within the main channel 110, preventing it from buckling and making it easier to remove.

[0073] As shown in Figure 3, the above-mentioned first diversion channel 210 includes a first guide channel 211 and a first outlet channel 212. The first guide channel 211 extends along the extension direction of the first diversion part 200, and the other end of the first outlet channel 212 is connected to the first guide channel 211. The other end of the first outlet channel 212 is arranged on a side of the first diversion part 200 facing the second diversion part 300.

[0074] The second diversion channel 310 includes a second guide channel 311 and a second outlet channel 312. The second guide channel 311 extends along the extension direction of the second diversion part 300. The other end of the second outlet channel 312 is connected to the second guide channel 311. The other end of the second outlet channel 312 is arranged on a side of the second diversion part 300 facing the first diversion part 200.

[0075] By dividing the first diversion channel 210 into a first guide channel 211 and a first outlet channel 212, the central axis of the first guide channel 211 and the central axis of the first outlet channel 212 form an angle, so that the fluid in the first diversion channel 210 changes direction when flowing from the first guide channel 211 to the first outlet channel 212. The first guide channel 211 is used to guide the fluid in the main channel 110 to the first outlet channel 212, and the first outlet channel 212 is used to guide the fluid in the first diversion channel into the oral cavity. The extension direction of the first outlet channel 212 is perpendicular or nearly perpendicular to the length direction of the teeth, which has a better cleaning effect on the teeth.

[0076] By dividing the second diversion channel 310 into a second guide channel 311 and a second outlet channel 312, the central axis of the second guide channel 311 and the central axis of the second outlet channel 312 have an angle, so when the fluid in the second diversion channel 310 flows from the second guide channel 311 to the second outlet channel 312, the fluid will change direction. The second guide channel 311 is used to guide the fluid in the main channel 110 to the second outlet channel 312, and the second outlet channel 312 is used to guide the fluid in the second diversion channel into the oral cavity. The extension direction of the second outlet channel 312 is perpendicular or nearly perpendicular to the length direction of the teeth, which has a better cleaning effect on the teeth.

[0077] As shown in Figures 3 and 6, a first protrusion 220 is provided on a side of the first diverter portion 200 that faces the second diverter portion 300, and the first outlet channel 212 is provided through the first protrusion 220. The provision of the first protrusion 220 shortens the distance that the water from the first diverter portion 200 travels to reach the area to be cleaned, reducing the water pressure loss during the water flow, thereby maintaining the water pressure at the area to be cleaned and optimizing the cleaning effect.

[0078] As shown in Figures 3 and 7, a second protrusion 320 is provided on the side of the second diverter portion 300 facing the first diverter portion 200, and the second outlet channel 312 is provided through the second protrusion 320. The provision of the second protrusion 320 can shorten the distance that the water discharged from the second diverter portion 300 needs to travel to reach the area to be cleaned, reducing the water pressure consumption during the water discharge, thereby maintaining the water pressure reaching the area to be cleaned and optimizing the cleaning effect.

[0079] As shown in Figure 4, the above-mentioned first outlet channel 212 includes a first collecting section 213, a first transition section 214 and a first pressure reducing section 215. The first collecting section 213, the first transition section 214 and the first pressure reducing section 215 are arranged in sequence from the inside to the outside along the extension direction of the first outlet channel 212. That is, the first collecting section 213 is connected between the first guide channel 211 and the first transition section 214, and the first transition section 214 is connected between the first collecting section 213 and the first pressure reducing section 215. One end of the first pressure reducing section 215 is exposed from the side of the first diversion part 200 facing the second diversion part 300 for spraying water outward.

[0080] The cross-sectional area of ​​the first collecting section 213 and the cross-sectional area of ​​the first pressure reducing section 215 are both greater than the cross-sectional area of ​​the first transition section 214 .

[0081] In this way, the cross-sectional area of ​​the first collecting section 213 is larger, and the fluid in the first guide channel 211 can be quickly collected into the first outlet channel 212; the cross-sectional area of ​​the first transition section 214 is smaller than the cross-sectional area of ​​the first collecting section 213. After the fluid in the first collecting section 213 flows into the first transition section 214, the water pressure and the water flow rate will increase, thereby increasing the water output and the water flow rate of the first diversion part 200, and ensuring the cleaning effect; the cross-sectional area of ​​the first decompression section 215 is also larger than the cross-sectional area of ​​the first transition section 214, so the liquid sprayed from the first decompression section 215 covers a large area, so as to achieve a large-scale cleaning of the oral cavity, and can reduce local water pressure, avoid a tingling sensation when cleaning the oral cavity, and optimize the user experience.

[0082] As shown in Figure 5, the above-mentioned second outlet channel 312 includes a second collecting section 313, a second transition section 314 and a second pressure reducing section 315. The second collecting section 313, the second transition section 314 and the second pressure reducing section 315 are arranged in sequence from inside to outside along the extension direction of the second outlet channel 312, that is, the second collecting section 313 is connected between the second guide channel 311 and the second transition section 314, the second transition section 314 is connected between the second collecting section 313 and the second pressure reducing section 315, and one end of the second pressure reducing section 315 is exposed from the side of the second diversion part 300 facing the first diversion part 200 for spraying water outward.

[0083] The cross-sectional area of ​​the second collecting section 313 and the cross-sectional area of ​​the second pressure reducing section 315 are both greater than the cross-sectional area of ​​the second transition section 314 .

[0084] In this way, the cross-sectional area of ​​the second collecting section 313 is larger, and the fluid in the second flow guide channel 311 can be quickly collected into the second outlet channel 312; the cross-sectional area of ​​the second transition section 314 is smaller than the cross-sectional area of ​​the second collecting section 313. After the fluid in the second collecting section 313 flows into the second transition section 314, the water pressure and the water flow rate will increase, thereby increasing the water output and the water flow rate of the second diversion part 300, and ensuring the cleaning effect; the cross-sectional area of ​​the second decompression section 315 is also larger than the cross-sectional area of ​​the second transition section 314, so the liquid sprayed from the second decompression section 315 covers a large area, so as to achieve a large-scale cleaning of the oral cavity, and can reduce local water pressure, avoid a tingling sensation when cleaning the oral cavity, and optimize the user experience.

[0085] As shown in Figure 4, the cross-sectional area of ​​the first collecting section 213 gradually decreases from the inside to the outside. In other words, the first collecting section 213 can be constructed as a truncated cone-shaped channel, and the inner wall surface of the first collecting section 213 can be a plane or an outwardly convex curved surface.

[0086] In this way, the cross-sectional area of ​​the end where the first collecting section 213 is connected to the first guide channel 211 is large, which can achieve the effect of collecting flow, and the cross-sectional area of ​​the end where the first collecting section 213 is connected to the first guide channel 211 is closer to the cross-sectional area of ​​the first transition section 214. The inner wall surface of the first outlet channel 212 will not form a step or the size of the step is smaller at the junction of the first collecting section 213 and the first guide channel 211. When the fluid flows from the first collecting section 213 to the first transition section 214, the turbulence of the fluid at the junction of the first collecting section 213 and the first guide channel 211 is lower, which is conducive to ensuring the smoothness of the flow of the fluid in the first outlet channel 212.

[0087] As shown in Figure 5, the cross-sectional area of ​​the second header section 313 gradually decreases from the inside to the outside. In other words, the second header section 313 can be constructed as a truncated cone-shaped channel, and the inner wall surface of the second header section 313 can be a plane or an outwardly convex curved surface.

[0088] In this way, the cross-sectional area of ​​one end of the second collecting section 313 connected to the second guide channel 311 is large, which can achieve the effect of collecting flow, and the cross-sectional area of ​​one end of the second collecting section 313 connected to the second guide channel 311 is closer to the cross-sectional area of ​​the second transition section 314. The inner wall surface of the second outlet channel 312 will not form a step or the size of the step is smaller at the junction of the second collecting section 313 and the second guide channel 311. When the fluid flows from the second collecting section 313 to the second transition section 314, the turbulence of the fluid at the junction of the second collecting section 313 and the second guide channel 311 is lower, which is conducive to ensuring the smoothness of the flow of the fluid in the second outlet channel 312.

[0089] For example, the first transition section 214 can be configured as a cylindrical channel, and the second transition section 314 can be configured as a cylindrical channel. The first decompression section 215 can be configured as a cylindrical channel, and the second decompression section 315 can be configured as a cylindrical channel. Alternatively, the first decompression section 215 can be configured as a truncated cone-shaped channel, and the inner wall surface of the first decompression section 215 can be a flat surface or an outwardly convex curved surface, and the second decompression section 315 can be configured as a truncated cone-shaped channel, and the inner wall surface of the first decompression section 215 can be a flat surface or an outwardly convex curved surface.

[0090] As shown in Figure 3, the first outlet channel 212 is located between the two ends of the first flow guiding channel 211 and is close to the end of the first flow guiding channel 211 away from the main channel 110. In other words, in the extension direction of the first flow guiding channel 211, the two ends of the first flow guiding channel 211 exceed the outer edge of the end where the first outlet channel 212 connects to the first flow guiding channel 211.

[0091] In this way, it can ensure that the connecting area between the first flow guide channel 211 and the first outlet channel 212 is large enough, avoiding the small connecting area between the first flow guide channel 211 and the first outlet channel 212 due to errors such as processing errors, and ensuring the water outlet speed and water output of the first flow guide channel 211, thereby making the cleaning effect of the water flosser better.

[0092] 3 , the second outlet channel 312 is located between the two ends of the second flow guiding channel 311 and is close to the end of the second flow guiding channel 311 away from the main channel 110. In other words, in the extension direction of the second flow guiding channel 311, the two ends of the second flow guiding channel 311 extend beyond the outer edge of the end where the second outlet channel 312 connects to the second flow guiding channel 311.

[0093] In this way, it can ensure that the connecting area between the second flow guide channel 311 and the second outlet channel 312 is large enough, avoiding the small connecting area between the second flow guide channel 311 and the second outlet channel 312 due to errors such as processing errors, and ensuring the water outlet speed and water output of the second flow guide channel 311, so as to achieve better cleaning effect of the water flosser.

[0094] As shown in FIG3 , the first branch channel 210 and the second branch channel 310 are located between the two ends of the main channel 110. That is, in the extension direction of the main channel 110, the two ends of the main channel 110 extend beyond the outer edge of the end where the first branch channel 210 connects to the main channel 110, and the two ends of the main channel 110 also extend beyond the outer edge of the end where the second branch channel 310 connects to the main channel 110.

[0095] In this way, it can ensure that the connecting area between the main channel 110 and the first branch channel 210 and the second branch channel 310 is large enough, avoiding the small connecting area between the first branch channel 210 and the second branch channel 310 and the main channel 110 due to errors such as processing errors, ensuring the water outlet speed and water output of the first branch channel 210 and the second branch channel 310, so that the cleaning effect of the water flosser is better.

[0096] In addition, the first branch channel 210 is farther away from the spray bar 2 than the second branch channel 310 , and the first branch channel 210 is closer to an end of the main channel 110 farther away from the spray bar 2 .

[0097] That is to say, in the extension direction of the main channel 110, the distance between the end of the first branch channel 210 connected to the main channel 110 and the end of the main channel 110 away from the spray rod 2 is smaller than the distance between the end of the first branch channel 210 connected to the main channel 110 and the end of the main channel 110 close to the spray rod 2.

[0098] In this way, in the extension direction of the main channel 110, the end of the main channel 110 away from the spray rod 2 does not need to excessively exceed the end where the first branch channel 210 is connected to the main channel 110, which can avoid the extension size of the main channel 110 being too large, thereby reducing the extension size of the main section 100. On the one hand, it reduces costs and saves production materials. On the other hand, it improves the structural strength of the main section 100, thereby improving the ability of the main section 100 to maintain its own shape, which is conducive to the fluid flowing through the main channel 110 to the first branch channel 210 and the second branch channel 310.

[0099] The wall thickness of the main channel 110 is not less than 1.5 mm. In other words, the wall thickness of the main channel 110 is greater than or equal to 1.5 mm. For example, the wall thickness of the main channel 110 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm.

[0100] When the wall thickness of the main channel 110 is less than 1.5 mm, the wall thickness of the main channel 110 is relatively thin, and the wall of the main channel 110 is easily deformed by force, and the structure of the wall of the main channel 110 is not easy to maintain. Since the fluid of the spray rod 2 needs to pass through the main channel 110 to flow to the first branch channel 210 and the second branch channel 310, after the main channel 110 is deformed, the main portion 100 may bend and cause the cross-sectional area of ​​part of the main channel 110 to decrease, thereby affecting the speed and flow of the fluid flowing to the first branch channel 210 and the second branch channel 310. Excessive reduction in the water outlet speed or water output of any one of the first branch channel 210 and the second branch channel 310 will affect the cleaning effect of the water flosser.

[0101] When the wall thickness of the main channel 110 is not less than 1.5 mm, the wall thickness of the main channel 110 is large enough to reduce the deformation probability and deformation amplitude of the wall of the main channel 110. The structure of the wall of the main channel 110 has good retention ability. When the fluid of the spray rod 2 flows through the main channel 110 to the first branch channel 210 and the second branch channel 310, the water outlet speed and water output of the first branch channel 210 can be maintained within the effective range, and the water outlet speed and water output of the second branch channel 310 can be maintained within the effective range, thereby improving the cleaning effect of the oral irrigator on the oral cavity.

[0102] As shown in FIG3 , when the central axis of the main flow portion 100 coincides with the central axis of the nozzle rod 2 of the oral irrigator, the cross-sectional area of ​​the main flow channel 110 is smaller than the cross-sectional area of ​​the flow channel 500 in the nozzle rod 2. For example, the difference between the cross-sectional area of ​​the main flow channel 110 and the cross-sectional area of ​​the flow channel 500 in the nozzle rod 2 is 0.02 mm to 0.1 mm, and the difference between the cross-sectional area of ​​the main flow channel 110 and the cross-sectional area of ​​the flow channel 500 in the nozzle rod 2 of the oral irrigator can be 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.08 mm, or 0.1 mm.

[0103] During the nozzle processing, secondary injection molding is required. During the secondary injection molding of the nozzle, a needle-shaped mold 5 needs to be inserted into the main channel 110. The needle-shaped mold 5 can be a needle-shaped structure made of hard materials such as steel needles, iron needles, and glass needles.

[0104] For example, the needle-shaped mold 5 needs to be inserted into the main channel 110 by the spray rod 2 so that the central axis of the main flow part 100 of the nozzle after the secondary injection molding coincides with the central axis of the spray rod 2 of the water flosser. Therefore, the cross-sectional area of ​​the needle-shaped mold 5 is smaller than the cross-sectional area of ​​the flow channel 500 in the spray rod 2, thereby avoiding the situation where the needle-shaped mold 5 cannot be inserted into the flow channel 500 in the spray rod 2, and the friction between the needle-shaped mold 5 and the spray rod 2 is too large, thereby improving the movement smoothness of the needle-shaped mold 5 in the spray rod 2.

[0105] In addition, the cross-sectional area of ​​the needle-shaped mold 5 is larger than the cross-sectional area of ​​the main channel 110. After the needle-shaped mold 5 is inserted into the main channel 110, the needle-shaped mold 5 and the main channel 110 are interference fit. Since the main portion 100 is an elastic part, the main portion 100 can be elastically deformed as the needle-shaped mold 5 is inserted. The needle-shaped mold 5 and the main portion 100 will not be damaged due to friction, and the needle-shaped mold 5 fits tightly with the inner wall of the main channel 110, which can seal the main channel 110 and avoid liquid flowing into the main channel 110 during secondary injection molding and affecting the structure of the main channel 110, thereby ensuring that the structure of the main channel 110 meets expectations, so that the fluid flows smoothly in the main channel 110.

[0106] As shown in FIG. 3 , the thickness of the first diverter portion 200 gradually decreases and / or remains constant from the center of the first diverter portion 200 in the width direction to the edge of the first diverter portion 200 in the width direction.

[0107] During the molding process of the nozzle 1, the mold is located on opposite sides of the width direction of the first diverter portion 200. Therefore, it is arranged in the width direction of the first diverter portion 200, and the thickness of the first diverter portion 200 gradually decreases from the center to the edge or remains unchanged, which can avoid the situation of undercutting during demoulding, facilitates the demoulding of the first diverter portion 200, and has a low probability of damage to the first diverter portion 200.

[0108] For example, the side surface of the first diverter portion 200 facing away from the second diverter portion 300 can be set as an arc surface, and in the width direction of the first diverter portion 200, the center of the side surface of the first diverter portion 200 facing away from the second diverter portion 300 protrudes relative to the two side edges in the direction away from the second diverter portion 300; the side surface of the first diverter portion 200 facing the second diverter portion 300 can also be set as an arc surface, and in the width direction of the first diverter portion 200, the center of the side surface of the first diverter portion 200 facing the second diverter portion 300 protrudes relative to the two side edges in the direction close to the second diverter portion 300.

[0109] As shown in FIG. 3 , the thickness of the second diverter portion 300 gradually decreases and / or remains constant from the center of the second diverter portion 300 in the width direction to the edge of the second diverter portion 300 in the width direction.

[0110] During the molding process of the nozzle 1, the mold is located on opposite sides of the width direction of the second diverter portion 300. Therefore, it is arranged in the width direction of the second diverter portion 300, and the thickness of the second diverter portion 300 gradually decreases from the center to the edge or remains unchanged, which can avoid the situation of undercutting during demoulding, facilitates the demoulding of the second diverter portion 300, and has a low probability of damage to the second diverter portion 300.

[0111] For example, the side surface of the second diverter portion 300 facing away from the first diverter portion 200 can be set as an arc surface, and in the width direction of the second diverter portion 300, the center of the side surface of the second diverter portion 300 facing away from the first diverter portion 200 protrudes relative to the two side edges in the direction away from the first diverter portion 200; the side surface of the second diverter portion 300 facing the first diverter portion 200 can also be set as an arc surface, and in the width direction of the second diverter portion 300, the center of the side surface of the second diverter portion 300 facing the first diverter portion 200 protrudes relative to the two side edges in the direction close to the first diverter portion 200.

[0112] As shown in FIG. 3 , the thickness of the main flow portion 100 gradually decreases and / or remains constant from the center of the main flow portion 100 in the width direction to the edge of the main flow portion 100 in the width direction.

[0113] During the molding process of the nozzle 1, the mold is located on opposite sides of the width direction of the main part 100. Therefore, it is set in the width direction of the main part 100, and the thickness of the main part 100 gradually decreases from the center to the edge or remains unchanged, which can avoid the situation of undercutting during demolding, facilitates the demolding of the main part 100, and has a low probability of damage to the main part 100.

[0114] For example, the front surface 101 of the mainstream portion 100 can be set as a curved surface, and in the width direction of the mainstream portion 100, the center of the front surface 101 protrudes toward the direction away from the back surface 102 relative to the two side edges; the back surface 102 of the mainstream portion 100 can also be set as a curved surface, and in the width direction of the mainstream portion 100, the center of the back surface 102 protrudes toward the direction away from the front surface 101 relative to the two side edges.

[0115] As shown in Figures 8 and 9, the upper main flow section 100 has a front side 101 and a back side 102 that are relatively arranged. The front side 101 is connected to the first diversion section 200 and the second diversion section 300. The back side 102 is provided with a process port 140. The process port 140 is connected to the main flow channel 110. One end of the first diversion channel 210 facing the process port 140 and one end of the second diversion channel 310 facing the process port 140 are both arranged corresponding to the position of the process port 140.

[0116] For example, during the nozzle molding process, after molding, the mold in the first branch channel 210 , the mold in the second branch channel 310 , and the mold in the main channel 110 can be easily pulled out from the process port 140 , making core pulling easy.

[0117] In addition, the nozzle 1 also includes a sealing portion 400. For example, a portion of the main flow portion 100 is integrally formed with the first diversion portion 200 and the second diversion portion 300. The process port 140 is constructed as the above-mentioned portion of the main flow portion 100, and the sealing portion 400 is another portion of the main flow portion 100. The sealing portion 400 and the above-mentioned portion of the main flow portion 100 are constructed as an integrated structure for sealing the process port 140.

[0118] The material of the cover portion 400 and the material of the above-mentioned part of the main portion 100 may be the same or different.

[0119] In some embodiments of the present application, the cover portion 400 is an elastic member, and the cover portion 400 can be made of an elastic material such as a silicone member. Silicone materials are chemically stable and will not be corroded by saliva even if used in the mouth for a long time. For example, the silicone material can be edible silicone, which can avoid harm to the human body from toxic substances. It is understood that the elastic material can also include other soft rubber materials, such as PE (polyethylene, abbreviated as PE) and PP (polypropylene, abbreviated as PP). Soft rubber materials can not only deform elastically but also protect teeth and gums from being injured.

[0120] In other embodiments of the present application, the cover portion 400 is a hard part, and the cover portion 400 can be made of hard materials such as plastic. This is beneficial to improving the structural strength of the main channel 110 to reduce the probability of excessive deformation of the main channel 110, thereby helping the main channel 110 maintain its own shape and ensure the smoothness of the flow of fluid in the main channel 110.

[0121] By providing the cover portion 400, the process port 140 can be sealed, preventing the fluid in the main channel 110 from leaking from the process port 140. Since the cover portion 400 and the main channel 100 are constructed as an integrated structure, the connection strength between the cover portion 400 and the main channel 100 is higher, and the sealing performance is better. The nozzle 1 can be more adaptable to special placement conditions such as bending and high temperature, and the service life of the nozzle 1 is extended. The requirements of the nozzle 1 for the placement environment can also be correspondingly reduced, which is conducive to improving the applicability of the nozzle 1.

[0122] As shown in FIG9 , the cross-sectional area of ​​the process opening 140 gradually increases or remains constant as it moves away from the main channel 110. This allows the molds in the first branch channel 210, the second branch channel 310, and the main channel 110 to pass more smoothly from the process opening 140 without back-stuck, facilitating core pulling and easy demoulding.

[0123] The above-mentioned part of the main flow portion 100, the first diversion portion 200 and the second diversion portion 300 are formed into an integrated structure by a single injection molding, and the above-mentioned part of the main flow portion 100 and the cover portion 400 are formed into an integrated structure by a second injection molding.

[0124] In this way, the nozzle 1 can be completed through two injection moldings, with fewer processing steps and easy core pulling. After production, the nozzle 1 is an integrated structure with high structural strength, long service life and good sealing.

[0125] The following describes the nozzle molding process with examples in conjunction with the accompanying drawings:

[0126] As shown in FIG10 , a spray bar 2 is formed, wherein the spray bar 2 can be a hard part made of plastic material, and a needle-shaped mold 5 is inserted into the flow channel 500 of the spray bar 2, wherein the needle-shaped mold 5 can be a steel needle, etc.;

[0127] As shown in FIG11 , the spray bar 2 with the needle-shaped mold 5 inserted therein is placed in the first molding die 4 , and at least a portion of the main flow portion 100 of the nozzle 1 , the first branch flow portion 200 , and the second branch flow portion 300 are molded in the first molding die 4 . The main flow portion 100 is connected to the spray bar 2 , and a portion of the needle-shaped mold 5 is inserted into the main flow portion 100 so that the flow channel 500 of the spray bar 2 is connected to the main flow channel 110 of the main flow portion 100 . The first molding die 4 molds the main flow channel 110 in the main flow portion 100 , the first branch flow channel 210 in the first branch flow portion 200 , and the second branch flow channel 310 in the second branch flow portion 300 , and core pulling is performed.

[0128] As shown in FIG12 , the nozzle 1 and the spray rod 2 are taken out from the first forming mold 4 ;

[0129] As shown in FIG13 , the needle-shaped mold 5 is pulled out;

[0130] As shown in FIG14 , the needle-shaped mold 5 is inserted into the flow channel 500 and the main channel 110 of the spray bar 2 again, with both ends of the needle-shaped mold 5 extending beyond the process hole 140 in the extending direction of the main channel 110 ;

[0131] As shown in FIG15 , the spray rod 2 and the nozzle 1 inserted into the needle-shaped mold 5 are placed in the second molding die 6 , and a capping portion 400 integrally formed with the main flow portion 100 is molded in the second molding die 6 . The capping portion 400 is located in the process port 140 and is used to cover the process port 140 .

[0132] As shown in FIG16 , the complete nozzle head 1 and the nozzle rod 2 are taken out from the second forming mold 6 ;

[0133] As shown in FIG17 , the needle-shaped mold 5 is pulled out.

[0134] Of course, in some embodiments of the present application, the nozzle head 1 may be formed first, and then the spray rod 2 connected to the nozzle head 1 may be formed.

[0135] 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, they are based on the directions or positional relationships shown in the drawings. This 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 limiting this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0136] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A nozzle, applied to a dental irrigator, comprising: A spray rod, provided with a flow channel, and the spray rod is a rigid member; A nozzle head, including a main flow portion, a first diversion portion and a second diversion portion, the first diversion portion and the second diversion portion are arranged at intervals along the extending direction of the main flow portion, and the first diversion portion and the second diversion portion are located on the same side of the main flow portion; Wherein, at least a part of the nozzle head is an elastic member, the nozzle head is constructed as an integral structure, and the main flow portion is connected to the spray rod; The main flow portion is provided with a main flow channel, the first diversion portion is provided with a first diversion channel, the second diversion portion is provided with a second diversion channel, and the main flow channel is respectively communicated with the flow channel, the first diversion channel and the second diversion channel.

2. The nozzle according to claim 1, wherein, The arrangement mode of the main flow portion and the spray rod is one of the following; Mode 1: The central axis of the main flow portion coincides with the central axis of the spray rod; Mode 2: The central axis of the main flow portion is perpendicular to the central axis of the spray rod.

3. The nozzle according to claim 1, wherein, The main flow portion has a front surface and a back surface which are oppositely arranged, and the front surface is connected to the first diversion portion and the second diversion portion; Among the end surface of one end of the main flow portion and the back surface, one is open and connected to the spray rod, and the other is closed.

4. The nozzle according to claim 1, wherein, When the central axis of the main flow portion coincides with the central axis of the spray rod, the main flow portion includes: A flow channel portion, which is respectively connected to the first diversion portion and the second diversion portion; A connection portion, which is respectively connected to the flow channel portion and the spray rod, and the flow channel portion and the connection portion are arranged along the extending direction of the main flow portion.

5. The nozzle according to claim 4, wherein, One end of the connection portion facing the spray rod is provided with a socket hole, and the socket hole is communicated with the main flow channel; The spray rod is inserted into the socket hole, and the spray rod is in sealing fit with the inner wall of the socket hole.

6. The nozzle according to claim 5, wherein, The inner wall of the socket hole is provided with a first stop step, and the outer peripheral surface of the spray rod is provided with a second stop step, and the first stop step and the second stop step are abutted against each other.

7. The nozzle according to claim 4, wherein, The main flow portion has a front surface and a back surface which are oppositely arranged, and the front surface is connected to the first diversion portion and the second diversion portion; In the width direction of the flow channel portion, the size of the flow channel portion is larger than the size of the connection portion, and the connection portion is connected to the back surface and is in arc transition.

8. The nozzle according to claim 1, wherein, The construction mode of the nozzle is at least one of the following: Mode 1: The cross-sectional area of the first diversion channel gradually decreases and / or remains unchanged in the direction away from the main flow channel; Mode 2: The cross-sectional area of the second diversion channel gradually decreases and / or remains unchanged in the direction away from the main flow channel; Mode 3: The cross-sectional area of the main flow channel gradually decreases and / or remains unchanged in the direction away from the spray rod.

9. The nozzle according to claim 1, wherein, The first diversion channel includes a first guiding channel and a first outflow channel, the first guiding channel extends along the extending direction of the first diversion portion, the other end of the first outflow channel is connected to the first guiding channel, and the other end of the first outflow channel penetrates through the side surface of the first diversion portion facing the second diversion portion; The second flow dividing channel includes a second guiding channel and a second outflow channel. The second guiding channel extends along the extending direction of the second flow dividing portion. The other end of the second outflow channel is connected to the second guiding channel, and the other end of the second outflow channel penetrates through one side surface of the second flow dividing portion facing the first flow dividing portion.

10. The nozzle according to claim 9, wherein, One side surface of the first flow dividing portion facing the second flow dividing portion is provided with a first protrusion, and the first outflow channel penetrates through the first protrusion. One side surface of the second flow dividing portion facing the first flow dividing portion is provided with a second protrusion, and the second outflow channel penetrates through the second protrusion.

11. The nozzle according to claim 9, wherein, The first outflow channel includes a first converging section, a first transition section, and a first pressure reducing section. The first converging section, the first transition section, and the first pressure reducing section are arranged in sequence from inside to outside along the extending direction of the first outflow channel. The cross-sectional areas of both the first converging section and the first pressure reducing section are larger than the cross-sectional area of the first transition section. The second outflow channel includes a second converging section, a second transition section, and a second pressure reducing section. The second converging section, the second transition section, and the second pressure reducing section are arranged in sequence from inside to outside along the extending direction of the second outflow channel. The cross-sectional areas of both the second converging section and the second pressure reducing section are larger than the cross-sectional area of the second transition section.

12. The nozzle according to claim 11, wherein, The cross-sectional area of the first converging section gradually decreases from inside to outside. The cross-sectional area of the second converging section gradually decreases from inside to outside.

13. The nozzle according to claim 9, wherein, The first outflow channel is located between the two ends of the first guiding channel and is close to the end of the first guiding channel far from the main channel. The second outflow channel is located between the two ends of the second guiding channel and is close to the end of the second guiding channel far from the main channel.

14. The nozzle according to claim 1, wherein, The first flow dividing channel and the second flow dividing channel are located between the two ends of the main channel. The first flow dividing channel is farther from the spray bar than the second flow dividing channel, and the first flow dividing channel is close to the end of the main channel far from the spray bar.

15. The nozzle according to claim 1, wherein, The wall thickness of the main channel is not less than 1.5 mm.

16. The nozzle according to claim 1, wherein, When the central axis of the main portion coincides with the central axis of the spray bar, the cross-sectional area of the main channel is smaller than the cross-sectional area of the flow channel inside the spray bar.

17. The nozzle according to claim 1, wherein, The nozzle is constructed in at least one of the following ways: Way 1: From the center in the width direction of the first flow dividing portion to the edge in the width direction thereof, the thickness of the first flow dividing portion gradually decreases and / or remains unchanged. Way 2: From the center in the width direction of the second flow dividing portion to the edge in the width direction thereof, the thickness of the second flow dividing portion gradually decreases and / or remains unchanged. Way 3: From the center in the width direction of the main portion to the edge in the width direction thereof, the thickness of the main portion gradually decreases and / or remains unchanged.

18. The nozzle according to claim 1, wherein, The main portion has a front surface and a back surface which are oppositely arranged. The front surface is connected to the first flow dividing portion and the second flow dividing portion. The back surface is provided with a process port which is communicated with the main channel. One end of the first flow dividing channel facing the process port and one end of the second flow dividing channel facing the process port are both arranged corresponding to the position of the process port. The spray head further includes: A cover part, the cover part and the main flow part are constructed as an integral structure and are used to cover the process port.

19. The nozzle according to claim 18, wherein, The cross-sectional area of the process port gradually increases or remains unchanged in a direction away from the main flow channel.

20. An oral irrigator, wherein, Comprising: A main body; The spray rod is connected to the main body according to the nozzle described in any one of claims 1-19.

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