Multi-orifice nozzle

Abstract

The application discloses a multi-hole nozzle applied to the field of oral irrigators, which is composed of a nozzle main body, a flow guide seat and a water outlet switching assembly. The nozzle main body is internally provided with a water outlet channel, the water inlet end of which is connected with the body of the oral irrigator, and the water outlet end is provided with the flow guide seat. The communication hole on the flow guide seat is communicated with the water outlet channel. The water outlet switching assembly is provided with main and auxiliary water outlet holes and can be switched to the first or second position on the flow guide seat along the water outlet direction. When being in the first position, the main water outlet hole is aligned with the communication hole, and the water flow is sprayed through the main water outlet hole; when being switched to the second position, the auxiliary water outlet hole is aligned with the communication hole, and the water flow is sprayed through the auxiliary water outlet hole. The structure realizes the conversion of different water spraying modes through sliding switching. The application aims to meet the diversified needs of users for the water flow intensity, coverage range and use comfort during oral cleaning.

Description

Technical Field

[0001] This invention relates to the field of oral irrigator technology, and in particular to a multi-hole nozzle. Background Technology

[0002] Most existing oral irrigator nozzles are single-hole fixed structures, providing only a single water output mode, usually a concentrated high-pressure water flow. While this provides strong cleaning power, it is not very friendly to users with sensitive gums. Some products achieve mode switching by changing different nozzles, which is cumbersome and inconvenient. A few others use electronic valves or multi-channel designs to achieve multiple water output modes, but these are complex in structure, expensive, prone to leakage, and have low reliability. Summary of the Invention

[0003] The main objective of this invention is to provide a multi-hole nozzle designed to meet the diverse needs of users in terms of water flow intensity, coverage, and comfort during oral hygiene.

[0004] To achieve the above objectives, the present invention provides a multi-orifice nozzle, comprising:

[0005] The nozzle body has a water outlet channel, one end of which is the water outlet end and the other end is the water inlet end. The water inlet end is used to be installed on the body of the water flosser. A flow guide seat is provided at the water outlet end, and the flow guide seat is provided with a connecting hole that is connected to the water outlet channel; The water outlet switching assembly has a main water spray hole and multiple auxiliary water spray holes. The water outlet switching assembly is movably disposed on the guide seat along the water outlet direction of the water outlet channel so that the water outlet switching assembly has a first position and a second position. In the first position, the main water jet hole is aligned and connected with the connecting hole, so that the water flow sequentially passes through the water outlet channel, the connecting hole and the main water jet hole. In the second position, the plurality of auxiliary water jets are aligned and connected with the connecting hole, so that water flows out sequentially through the water outlet channel, the connecting hole and the auxiliary water jets.

[0006] In one embodiment, the multi-hole nozzle further includes a water distribution component, which has a first through hole and a plurality of second through holes. The diameter of the first through hole is larger than the diameter of the second through holes, and the plurality of second through holes are arranged around the first through hole. The water distribution component is connected to the end of the water outlet switching assembly away from the guide seat and rotates synchronously with the water outlet switching assembly. In the first position, the main water jet hole is connected to the first through hole; in the second position, the auxiliary water jet hole is connected to the second through hole.

[0007] In one embodiment, the water outlet switching assembly includes a nozzle cover and a water spray rotating component. The water spray rotating component is provided with the main water spray hole and the auxiliary water spray hole. The water spray rotating component is movably disposed on the flow guide seat. The nozzle cover is rotatably connected to the water spray rotating component to drive the water spray rotating component to rotate relative to the flow guide seat, so that the main water spray hole or the auxiliary water spray hole communicates with the connecting hole.

[0008] In one embodiment, the water spray rotating component has a first flat portion and a second flat portion disposed opposite to each other, and the inner wall of the nozzle cover is disposed on the first snap-fit ​​portion and the second snap-fit ​​portion. The first snap-fit ​​portion and the first flat portion form a circumferential snap-fit ​​engagement, and the second snap-fit ​​portion and the second flat portion form a circumferential snap-fit ​​engagement, so that the nozzle cover and the water spray rotating component are fixed relative to each other in the circumferential direction, and the nozzle cover can drive the water spray rotating component to rotate when it rotates.

[0009] In one embodiment, the inner wall of the nozzle cover is provided with a limiting member, which is arranged circumferentially along the inner wall of the nozzle cover. The nozzle body is provided with a first limiting protrusion, which is located on the side of the limiting member in the water outlet direction. The first limiting protrusion cooperates with the limiting member and abuts against the limiting member in the axial direction to prevent the nozzle cover from falling off the nozzle body.

[0010] In one embodiment, the water spray rotating component has an inlet surface and an outlet surface arranged opposite to each other, with the inlet surface facing the outlet end; wherein, the outlet surface is recessed in a groove and forms a first water flow path with the connecting hole, the first water flow path communicating with the main water spray hole; an annular cavity is recessed on the inlet surface and forms a second water flow path with the connecting hole, the second water flow path communicating with a plurality of the auxiliary water spray holes; the guide seat is disposed on the inlet surface and covers the annular cavity.

[0011] In one embodiment, the annular cavity is further provided with a third through hole and a fourth through hole arranged opposite to each other. The bottom surface of the annular cavity is constructed as an inclined surface, which has the maximum depth on the side close to the third through hole and the fourth through hole, and the depth gradually increases radially outward toward the third through hole and the fourth through hole. The groove extends radially and its extension direction intersects the central axis of the main water jet hole.

[0012] In one embodiment, the flow guide seat has a first flow guide surface and a second flow guide surface disposed opposite to each other, the first flow guide surface being disposed toward the water outlet end, and the second flow guide surface being recessed to form a flow guide cavity; wherein, the connecting hole includes a first connecting hole and a second connecting hole, the first connecting hole and the second connecting hole being disposed at intervals on the flow guide cavity, and communicating with the main water spray hole or the plurality of the auxiliary water spray holes.

[0013] In one embodiment, a first seal is provided at the connection between the nozzle cap and the nozzle body.

[0014] In one embodiment, a second seal is provided at the connection between the flow guide seat and the water outlet switching component.

[0015] In one embodiment, the nozzle body is provided with a stop portion, and the inner wall of the nozzle cover is formed with an installation groove. The stop portion is at least partially embedded in the installation groove and cooperates with the end wall of the installation groove to limit the movement stroke of the water outlet switching component along the water outlet direction, so that the nozzle body can switch between the first position and the second position.

[0016] In one embodiment, the nozzle further includes an elastic element disposed between the outer wall of the nozzle body and the nozzle cover. The inner wall of the nozzle cover is further provided with a second limiting protrusion and a third limiting protrusion, and a limiting groove formed on the second limiting protrusion and the third limiting protrusion. The limiting groove is located on the side opposite to the mounting groove. One end of the elastic element abuts against the nozzle body, and the other end is embedded in the limiting groove. It is used to abut against the nozzle body through the second limiting protrusion or the third limiting protrusion when the nozzle cover is rotated to the first position or the second position.

[0017] The technical solution of this invention is a multi-orifice nozzle, which is applied to a water flosser. The multi-orifice nozzle comprises three main parts: a nozzle body, a flow guide seat, and a water outlet switching assembly. The nozzle body has a through water outlet channel inside, one end of which is the water inlet end, used to connect with the water flosser body and receive high-pressure water flow, and the other end is the water outlet end, serving as the front-end interface for water output. The flow guide seat is fixedly installed at the water outlet end and has a connecting hole that directly connects to the water outlet channel of the nozzle body, serving as the only transition outlet for water flow from the internal channel to the external. The water outlet switching assembly can slide or move relative to the flow guide seat along the water outlet direction (i.e., the water flow axis), and integrates main spray holes and auxiliary spray holes with different functions on its body. When the user pushes the water outlet switching component to the first position, the main jet nozzle aligns and connects with the connecting hole on the guide seat. Water then flows sequentially through the water outlet channel, connecting hole, and main jet nozzle before being ejected in a concentrated, high-pressure manner, suitable for deep cleaning between teeth, gingival sulcus, or removing stubborn debris. When the switching component is pulled to the second position, the secondary jet nozzle aligns with the connecting hole, and the water flow changes to the secondary jet nozzle. This nozzle is typically designed as a diffuser, multi-pore array, or small-diameter structure, creating a gentler, wider-coverage rinsing flow, suitable for people with sensitive gums, orthodontic patients, or post-operative care requiring gentle rinsing. The entire switching process requires no electronic control, additional valves, or complex piping; it is completed simply through mechanical displacement. It is compact, intuitive to operate, cost-effective, and highly reliable, meeting diverse user needs for water flow intensity, coverage, and comfort during oral cleaning. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the multi-hole nozzle provided by the present invention; Figure 2 This is a schematic cross-sectional view of an embodiment of the multi-hole nozzle provided by the present invention; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 A schematic diagram of the structure of an embodiment of the nozzle cap provided by the present invention; Figure 5 This is a schematic cross-sectional view of an embodiment of the nozzle cap provided by the present invention; Figure 6 This is a schematic diagram of a structure of an embodiment of the flow guide provided by the present invention; Figure 7 This is a schematic diagram of a structure of an embodiment of the flow guide provided by the present invention; Figure 8 This is a schematic diagram of the structure of an embodiment of the water distribution component provided by the present invention; Figure 9 This is a schematic diagram of the structure of an embodiment of the water spray rotating component provided by the present invention; Figure 10 This is a schematic diagram of the structure of an embodiment of the water spray rotating component provided by the present invention; Figure 11 This is a schematic diagram of the structure of an embodiment of the nozzle body provided by the present invention.

[0020] 10. Nozzle body; 11. Water outlet channel; 12. Water outlet end; 13. Water inlet end; 14. First limiting protrusion; 15. Stop part; 20. Flow guide seat; 21. Connecting hole; 211. First connecting hole; 212. Second connecting hole; 22. First flow guide surface; 23. Second flow guide surface; 24. Flow guide cavity; 30. Water outlet switching component; 31. Main spray hole; 32. Secondary spray hole; 33. Nozzle cover; 331. First snap-fit ​​part; 332. Second snap-fit ​​part ; 333, limiting component; 334, mounting groove; 335, second limiting protrusion; 336, third limiting protrusion; 337, limiting groove; 34, water spray rotating component; 341, first flat part; 342, second flat part; 343, water inlet surface; 344, water outlet surface; 345, groove; 346, annular cavity; 3461, third through hole; 3462, fourth through hole; 40, water distribution component; 41, first through hole; 42, second through hole; 50, elastic component.

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] This invention proposes a multi-hole nozzle.

[0026] This application discloses a water flosser, which includes a toothbrush body, wherein the toothbrush body includes a handle and a multi-hole nozzle connected to the handle. The handle includes a housing and components such as a circuit board, a battery, and a motor disposed within the housing. The battery supplies power to the circuit board and the motor. The circuit board is used to control the motor's operation. The motor's output shaft extends outside the housing to vibrate with the nozzle outside the housing, thereby driving the multi-hole nozzle structure to vibrate at high frequency during motor operation. This allows for simultaneous or independent water jet spraying during brushing, combining the dual effects of mechanical bristle cleaning and water rinsing, significantly improving oral cleaning efficiency and user experience.

[0027] Reference Figures 1 to 11 In this embodiment of the invention, a multi-hole nozzle is applied to a dental flosser, comprising: The nozzle body 10 has a water outlet channel 11, one end of which is a water outlet 12 and the other end is a water inlet 13. The water inlet 13 is used to install on the body of the water flosser. A flow guide seat 20 is provided at the water outlet 12. The flow guide seat 20 is provided with a connecting hole 21, which is connected to the water outlet channel 11. The water outlet switching assembly 30 has a main water spray hole 31 and multiple auxiliary water spray holes 32. The water outlet switching assembly 30 is movably disposed on the guide seat 20 along the water outlet direction of the water outlet channel 11 so that the water outlet switching assembly 30 has a first position and a second position. In the first position, the main water jet 31 is aligned and connected with the connecting hole 21, so that the water flow is sprayed out sequentially through the water outlet channel 11, the connecting hole 21 and the main water jet 31. In the second position, multiple auxiliary water jet holes 32 are aligned and connected with the connecting hole 21, so that water flows out sequentially through the water outlet channel 11, the connecting hole 21 and the auxiliary water jet holes 32.

[0028] This solution is a multi-hole nozzle structure for oral irrigators. Its core purpose is to achieve flexible selection of different water outlet modes through mechanical switching, thereby improving the user experience and cleaning effect during oral hygiene. Specifically, the nozzle includes three main components: a nozzle body 10, a flow guide seat 20, and a water outlet switching component 30. The nozzle body 10 has a through water outlet channel 11 inside, with one end being the water inlet 13 connected to the oral irrigator body and the other end being the water outlet 12. The flow guide seat 20 is fixedly installed at the water outlet 12 and has a connecting hole 21 that communicates with the water outlet channel 11, serving as a transition channel for water flow from the nozzle body 10 to the outside. The water outlet switching component 30 can move axially relative to the flow guide seat 20 along the water outlet direction and integrates two different functions or forms of water outlet holes: a main water spray hole 31 and a secondary water spray hole 32. When the user pushes the water outlet switching component 30 to the first position, the main water jet 31 aligns with the connecting hole 21 on the guide seat 20, and the water flow sequentially passes through the water outlet channel 11, the connecting hole 21, and the main water jet 31. This typically creates a concentrated, high-pressure water flow, suitable for deep cleaning of areas such as between teeth or the gingival sulcus. When switched to the second position, the secondary water jet 32 ​​aligns with the connecting hole 21, and the water flow changes to the secondary water jet 32. This jet can be designed as a diffuser, fan-shaped, or multi-hole array to provide a gentler, larger-area rinsing mode, suitable for sensitive gums or large-area rinsing needs. The main water jet 31 and the secondary water jet 32 ​​are integrated into an axially sliding water outlet switching component 30, forming an alignment and conduction mechanism in conjunction with the single connecting hole 21 on the guide seat 20. When the water outlet switching component 30 is in different positions, only one spray hole is connected to the water flow channel, while the other is closed, thus ensuring a clear water flow path, low pressure loss, and a clear switching logic. This design is not only compact and easy to assemble, but also allows users to switch modes simply by manually pushing or pulling the nozzle tip, making the operation intuitive and requiring no additional buttons or power support.

[0029] Reference Figures 1 to 11 In this embodiment of the invention, the multi-hole nozzle further includes a water distribution component 40. The water distribution component 40 has a first through hole 41 and a plurality of second through holes 42. The diameter of the first through hole 41 is larger than the diameter of the second through holes 42. The plurality of second through holes 42 are arranged around the first through hole 41. The water distribution component 40 is connected to the end of the water outlet switching component 30 away from the guide seat 20 and rotates synchronously with the water outlet switching component 30. In the first position, the main water jet 31 is connected to the first through hole 41; in the second position, the auxiliary water jet 32 ​​is connected to the second through hole 42.

[0030] Specifically, the multi-hole nozzle already has the function of switching between the main spray hole 31 and the auxiliary spray hole 32 through the water outlet switching component 30; and this solution adds a water distribution component 40 on this basis. The water distribution component 40 is located at the end of the water outlet switching component 30 away from the guide seat 20 (i.e. the final water outlet side), and has a first through hole 41 and a second through hole 42, and the diameter of the first through hole 41 is larger than that of the second through hole 42. When the water outlet switching component 30 is in the first position, the main water jet 31 connects with the larger first through-hole 41, forming a high-flow, high-impact rinsing mode suitable for removing food debris or stubborn plaque deep between teeth. When switched to the second position, the secondary water jet 32 ​​connects with the smaller second through-hole 42, limiting the water flow cross-sectional area, thereby reducing the flow rate and impact. Simultaneously, it may work in conjunction with the diffusion structure of the secondary water jet 32 ​​itself to create a gentler, more concentrated fine stream or atomized effect, suitable for scenarios requiring gentle rinsing, such as sensitive gum areas, around orthodontic brackets, or post-operative care. It is understandable that the first through-hole 41, as the core channel in the main water jet mode, typically has a larger diameter to form a strong single water jet through a large flow rate. Placing it in the center conforms to the principle of fluid dynamics where the main flow channel is centered and resistance is minimized. Arranging multiple smaller-diameter second through-holes 42 around it fully utilizes the remaining annular space around the central large hole, maximizing the accommodation of multiple secondary water jets without increasing the overall outer diameter of the nozzle, thus achieving a highly compact structure. Secondly, this surrounding layout directly determines the water flow pattern in the secondary spray mode: when switching to the second position, water is sprayed simultaneously from multiple small holes around the center, naturally forming a wide-angle water curtain in a divergent, umbrella-like, or spiral shape. This dispersed water flow covers a wider area and has a gentler impact, making it ideal for cleaning gingival sulci, interdental surfaces, or sensitive areas. It complements the "point-like" powerful impact of the central main water jet, satisfying users' dual needs for "powerful erosion" and "gentle massage" in different cleaning scenarios. This design does not rely solely on the shape of the spray holes to control the water flow, but rather uses a two-stage collaborative structure of spray holes and flow-limiting holes (i.e., the first through hole 41 and the second through hole 42) to achieve more precise and stable control of water flow characteristics (such as pressure, flow rate, speed, and coverage). In addition, since the water distribution component 40 is fixedly installed on the outside of the water outlet 12, its structure is simple and easy to manufacture, and its movement with the water outlet switching component 30 does not require an additional drive mechanism, avoiding problems such as excessive turbulence or pressure loss caused by sudden changes in orifice diameter.

[0031] Reference Figures 1 to 11In this embodiment of the invention, the water outlet switching component 30 includes a nozzle cover 33 and a water spraying rotating component 34. The water spraying rotating component 34 is provided with a main water spraying hole 31 and a secondary water spraying hole 32. The water spraying rotating component 34 is movably disposed on the flow guide seat 20. The nozzle cover 33 is rotatably connected to the water spraying rotating component 34 and is used to drive the water spraying rotating component 34 to rotate relative to the flow guide seat 20 so that the main water spraying hole 31 or the secondary water spraying hole 32 communicates with the connecting hole 21.

[0032] Specifically, the water outlet switching assembly 30 is divided into two cooperating components: a water spray rotating component 34 and a nozzle cover 33. The water spray rotating component 34 directly carries the main water spray hole 31 and the auxiliary water spray hole 32 and is rotatably mounted on the guide seat 20. The nozzle cover 33 is fitted over the water spray rotating component 34 and is rotatably connected to it (e.g., through a snap-fit, cam groove, or keyway structure). The user only needs to rotate the nozzle cover 33 to drive the internal water spray rotating component 34 to rotate synchronously around its axis, so that the main water spray hole 31 or the auxiliary water spray hole 32 on it is aligned with the connecting hole 21 on the guide seat 20 in sequence, thus completing the switching of the water outlet mode. The rotating structure works in close coordination with the water distribution component 40 (which has a first through hole 41 and a second through hole with different diameters) 42: when the water spraying rotating component 34 rotates to different angles, the corresponding water spraying hole automatically connects with the downstream through hole with the matching diameter, realizing hole-to-hole water flow path matching, ensuring that the flow rate, pressure and spray pattern are optimized in each mode, rather than simply switching the hole position.

[0033] Reference Figures 1 to 11 In this embodiment of the invention, the water spray rotating member 34 is provided with a first flat portion 341 and a second flat portion 342 arranged opposite to each other. The inner wall of the nozzle cover 33 is provided with the first snap-fit ​​portion 331 and the second snap-fit ​​portion 332. The first snap-fit ​​portion 331 and the first flat portion 341 form a circumferential snap-fit ​​engagement, and the second snap-fit ​​portion 332 and the second flat portion 342 form a circumferential snap-fit ​​engagement, so that the nozzle cover 33 and the water spray rotating member 34 are fixed relative to each other in the circumferential direction. When the nozzle cover 33 rotates, it can drive the water spray rotating member 34 to rotate.

[0034] Specifically, the structure features two opposing first flat portions 341 and second flat portions 342 on the internal water spray rotating component 34, forming a non-circular drive profile. Simultaneously, a first engaging portion 331 and a second engaging portion 332 are correspondingly provided on the inner wall of the outer nozzle cover 33, each with abutting surface matching the aforementioned flat portions. When the nozzle is assembled, the engaging portions inside the nozzle cover 33 form a tight circumferential engaging fit with the flat portions on the water spray rotating component 34. This fit essentially creates a rigid connection mechanism similar to a flat key or spline, completely eliminating circumferential rotational gaps between the two. When the user holds and rotates the outer nozzle cover 33 to switch modes, the engaging portions on the inner wall of the nozzle cover 33 immediately abut against the flat portions of the water spray rotating component 34. Utilizing the large frictional torque and geometric limiting effect generated by the planar contact, the internal water spray rotating component 34 is forced to rotate synchronously, thereby driving the entire water outlet switching assembly 30 to move from the first position to the second position (or vice versa). This design avoids the problems of free spin, slippage, or torque transmission failure that may occur with traditional circular couplings, ensuring a crisp and clean operating feel and precise positioning. At the same time, the relative arrangement of the flat parts ensures the balance of force in the circumferential direction, preventing the parts from tilting or wearing due to unilateral force, and greatly improving the durability and reliability of the nozzle switching mechanism.

[0035] Reference Figures 1 to 11 In this embodiment of the invention, the inner wall of the nozzle cover 33 is provided with a limiting member 333, which is arranged in a ring along the inner wall of the nozzle cover 33. The nozzle body 10 is provided with a first limiting protrusion 14, which is located on the side of the limiting member 333 in the water outlet direction. The first limiting protrusion 14 cooperates with the limiting member 333 and abuts against the limiting member 333 in the axial direction to prevent the nozzle cover 33 from falling off the nozzle body 10.

[0036] Specifically, this design features a circumferentially extending limiting member 333 on the inner wall of the nozzle cover 33, and a corresponding first limiting protrusion 14 on the nozzle body 10. This first limiting protrusion 14 is located on the side of the limiting member 333 facing the water outlet direction. When the nozzle cover 33 is fitted onto the front end of the nozzle body 10 and assembled, the limiting member 333 and the first limiting protrusion 14 form a face-to-face abutment in the axial direction, thus creating a physical barrier. When the nozzle cover 33 attempts to move axially outward (i.e., away from the machine body), the limiting member 333 is immediately blocked by the first limiting protrusion 14 and cannot continue to detach, effectively preventing the nozzle cover 33 from accidentally falling off during use, cleaning, or transportation. The core reason for this design arrangement is to balance structural reliability, ease of assembly, and aesthetic integrity. By integrating an annular limiting member 333 inside the nozzle cover 33 and utilizing the existing structural space on the nozzle body 10 to set a corresponding first limiting protrusion 14, no additional parts are needed, the external shape is not damaged, and reliable axial locking is achieved while ensuring free rotation (the limiting member 333 and the first limiting protrusion 14 only constrain axially, not restricting circumferential rotation). Furthermore, the mating surface between the annular limiting member 333 and the first limiting protrusion 14 is large, resulting in uniform force distribution and effectively dispersing stress generated by water flow impact or external pulling, thus improving the structural durability over long-term use. It is understood that the first limiting protrusion 14 is typically an inner flange or an annular retaining ring.

[0037] Reference Figures 1 to 11 In this embodiment of the invention, the water spray rotating component 34 has an inlet surface 343 and an outlet surface 344 arranged opposite to each other, with the inlet surface 343 facing the outlet end 12; wherein, the outlet surface 344 is recessed in the groove 345 and forms a first water flow path in connection with the connecting hole 21, the first water flow path being connected to the main water spray hole 31, and an annular cavity 346 is recessed on the inlet surface 343 and forms a second water flow path in connection with the connecting hole 21, the second water flow path being connected to a plurality of auxiliary water spray holes 32; the guide seat 20 is disposed on the inlet surface 343 and covers the annular cavity 346.

[0038] Specifically, the water spray rotating component 34 is designed with an inlet surface 343 and an outlet surface 344 arranged opposite to each other. The inlet surface 343 faces the outlet end 12 of the nozzle body 10, serving as the inlet interface for water to enter the water outlet switching component 30. A recessed groove 345 is designed on the outlet surface 344. This groove 345 aligns with the connecting hole 21 of the guide seat 20 at a specific rotation angle, thus creating a first water flow path. This path is specifically responsible for guiding the water flow to the main spray hole 31, forming a concentrated, powerful water jet. On the opposite inlet surface 343, a recessed annular cavity 346 is machined. When the water outlet switching component 30 rotates to another mode, this annular cavity 346 connects with the connecting hole 21, forming a second water flow path. Due to the geometric characteristics of the annular cavity 346, it can simultaneously cover and connect multiple surrounding secondary spray holes 32, thereby achieving water diversion and spraying. The guide seat 20 not only serves as a connector but is also positioned at the inlet face 343, covering the entire annular cavity 346. This design forms a closed, pressure-stabilizing distribution chamber. In secondary spray mode, water flows through the connecting hole 21 into the annular cavity 346 covered by the guide seat 20. After pressure equalization and buffering using the space of the annular cavity 346, the water is then evenly distributed to the surrounding secondary spray holes 32, effectively avoiding uneven flow or pressure loss caused by direct impact. In primary spray mode, the water bypasses the annular cavity 346 area and directly enters the groove 345 passage. This design, which constructs grooves 345 and annular cavities 346 on both sides of the water spray rotating component 34 and combines them with an external cover, achieves two completely independent and non-interfering water flow logics within a compact outlet switching component 30. This ensures both the concentrated flow velocity during primary spray and the uniform distribution during secondary spray, greatly improving the integration and hydraulic performance of the nozzle's internal flow channel design. Understandably, the groove 345 in this design can be designed with various geometric structures to adapt to fluid dynamics and mechanical cooperation. The most common is a straight strip-shaped through groove or blind hole groove extending along the axial direction. Its cross-section can be rectangular, semi-circular, or trapezoidal to ensure a smooth, low-resistance flow channel when docking with the connecting hole 21. If the water flow pattern needs to be optimized, the groove 345 can also be designed as a tapered nozzle (wide inlet, narrow outlet) to accelerate the water flow, or a spiral guide groove to give the water flow rotational kinetic energy to enhance the cleaning effect. In this design, the annular cavity 346 can be designed as a closed circular groove or a segmented arc-shaped groove array distributed around the central axis of the inlet surface 343. Its cross-sectional shape can be processed into a rectangular, semi-circular, trapezoidal, or U-shaped groove with a guide surface according to the fluid requirements to ensure that the water flow can be evenly diffused to the surrounding auxiliary spray holes 32 after entering.To optimize hydraulic performance, the depth and width of the annular cavity 346 can be designed as a gradient structure (such as deep inside and shallow outside) to balance the pressure loss of each outlet, or flow equalization ribs, turbulence protrusions and flow guiding slopes can be set on the inner wall of the cavity to transform the straight water flow into a spiral or radial flow, thereby eliminating dead water zones and improving the uniformity of spray coverage.

[0039] Reference Figures 1 to 11 In this embodiment of the invention, the cavity of the annular cavity 346 is further provided with a third through hole 3461 and a fourth through hole 3462 arranged opposite to each other. The bottom surface of the annular cavity 346 is constructed as an inclined surface, which has the maximum depth on the side close to the third through hole 3461 and the fourth through hole 3462, and the depth gradually increases radially outward toward the third through hole 3461 and the fourth through hole 3462. The groove 345 extends radially and its extension direction intersects the central axis of the main water jet hole 31.

[0040] Specifically, for the annular cavity 346 responsible for the secondary spray mode, a third through hole 3461 and a fourth through hole 3462 are provided inside as water outlets, and the bottom surface of the annular cavity 346 is constructed as a special inclined surface structure. The depth of this inclined surface is not uniformly distributed, but is set to the maximum depth on the side (or a specific reference side) near the two through holes, and then gradually increases in depth radially outward towards the through holes. This variable-depth inclined bottom surface design can effectively utilize gravity or hydrostatic pressure difference to guide the water flow entering the annular cavity 346 to smoothly converge and accelerate towards the third through hole 3461 and the fourth through hole 3462, avoiding water flow stagnation or dead zones that may occur in traditional flat-bottomed cavities, and ensuring rapid response and uniform flow rate in the formation of the secondary spray water curtain. Meanwhile, the groove 345, responsible for the main spray mode, is designed as a straight groove extending radially, with its extension trajectory intersecting the central axis of the main spray hole 31. This orthogonal or oblique layout ensures that when the groove 345 is aligned with the connecting hole 21, the water flow can directly impact and pass through the central axis region of the main spray hole 31 with the shortest path and least resistance, thereby minimizing energy loss during fluid turning and ensuring that the main spray jet has extremely high straightness and impact force. Overall, this scheme, by introducing a gradually varying depth inclined guide surface within the annular cavity 346 and adopting a radially intersecting layout on the groove 345, achieves pressure equalization and flow splitting in the secondary spray mode and efficient direct injection in the main spray mode, significantly improving the hydraulic performance and structural compactness of the nozzle when switching between different modes.

[0041] Reference Figures 1 to 11In this embodiment of the invention, the flow guide seat 20 has a first flow guide surface 22 and a second flow guide surface 23 arranged opposite to each other. The first flow guide surface 22 is arranged towards the water outlet end 12, and the second flow guide surface 23 is recessed to form a flow guide cavity 24. The connecting hole 21 includes a first connecting hole 211 and a second connecting hole 212. The first connecting hole 211 and the second connecting hole 212 are spaced apart on the flow guide cavity 24 and are connected to the main spray hole 31 or multiple auxiliary spray holes 32.

[0042] Specifically, the flow guide seat 20 is constructed with a first flow guide surface 22 and a second flow guide surface 23 arranged opposite to each other. The first flow guide surface 22 faces the nozzle outlet end 12, serving as a sealing interface that fits against the inlet surface 343 of the external component or the water outlet switching component 30. The second flow guide surface 23 is recessed inward to form a closed or semi-closed flow guide cavity 24, which acts as a primary distribution chamber and pressure stabilizing buffer after the water flow enters the nozzle. Two independent connecting holes, namely a first connecting hole 211 and a second connecting hole 212, are spaced apart on the bottom or side wall of this flow guide cavity 24. This spaced arrangement completely isolates the two water flows in physical space, preventing cross-flow interference under high pressure. The first connecting hole 211 is specifically responsible for constructing a direct connection to the main spray hole 31, ensuring that the water flow can converge into a powerful water column with minimal resistance. The second connecting hole 212 is responsible for constructing a branching flow path to multiple auxiliary spray holes 32, introducing the water flow into the aforementioned annular cavity 346 for pressure equalization and distribution to form a water curtain. By integrating the two connecting holes 211 and 212 into the same guide cavity 24, this solution not only simplifies the internal piping structure of the nozzle and reduces the number of parts, but also utilizes the spatial effect of the guide cavity 24 to balance the fluctuation of the upstream inlet water pressure. This ensures that regardless of the angle to which the water spray rotating component 34 rotates, as long as the corresponding connecting hole is connected, a stable and unaffected spray effect can be obtained, greatly improving the response speed, sealing reliability, and overall hydraulic performance of the multi-hole nozzle during mode switching.

[0043] Reference Figures 1 to 11 In this embodiment of the invention, a first sealing element is provided at the connection between the nozzle cover 33 and the nozzle body 10.

[0044] At the connection between the nozzle cover 33 and the nozzle body 10 (which may be the mating surface between the inner wall of the nozzle cover 33 and the outer periphery of the nozzle body 10), a first seal made of an elastic material (such as silicone, TPE or rubber) is provided. The first seal may be in the form of an O-ring, a lip seal or a ring gasket with a custom cross section, etc. It fills the mating gap by pre-compression deformation during assembly to form a continuous and reliable sealing barrier.

[0045] Reference Figures 1 to 11 In this embodiment of the invention, a second sealing element is provided at the connection between the flow guide seat 20 and the water outlet switching component 30.

[0046] A second seal made of an elastic material (such as silicone, TPE or rubber) is provided at the connection between the flow guide seat 20 and the water outlet switching component 30. This seal can be in the form of an O-ring, lip seal or a ring gasket with a custom cross section, etc. It fills the gap during assembly by pre-compression deformation to form a continuous and reliable sealing barrier.

[0047] Reference Figures 1 to 11 In this embodiment of the invention, the nozzle body 10 is provided with a stop portion 15, and the inner wall of the nozzle cover 33 is formed with an installation groove 334. The stop portion 15 is at least partially embedded in the installation groove 334 and cooperates with the end wall of the installation groove 334 to limit the movement stroke of the water outlet switching component 30 along the water outlet direction, so that the nozzle body 10 switches between the first position and the second position.

[0048] By setting a stop 15 on the nozzle body 10 and forming a corresponding mounting groove 334 on the inner wall of the nozzle cover 33, the two are interlocked and formed at a specific position to form end face abutment, thereby strictly limiting the axial movement range of the water outlet switching component. This ensures that it always remains in the axial position allowed by the design during the rotation switching process, thereby ensuring that the main water spray hole 31 and the auxiliary water spray hole 32 can be accurately and stably aligned with the connecting hole 21 on the guide seat 20 and the corresponding through hole on the water distribution component 40, respectively, to achieve reliable and leak-free mode switching. Specifically, under the impact of high-pressure water flow from the water flosser, if the water outlet switching component 30 is not effectively axially constrained, it may experience slight axial displacement due to water pressure back thrust or assembly tolerance, resulting in misalignment, increased gap, or even complete separation between the water spray hole and the downstream connecting hole. This can cause water flow dispersion, pressure loss, and weak jetting, or even lead to leakage or switching failure. By embedding the stop portion 15 on the nozzle body 10 into the mounting groove 334 on the inner wall of the nozzle cover 33, the end face of the stop portion 15 and the end wall of the mounting groove 334 form a pair of axial limiting mating surfaces. When the component moves under the push of water flow (in the water outlet direction), the stop portion 15 will abut against the front wall of the mounting groove 334 and be blocked; when the user installs or presses the nozzle cover 33, the stop portion 15 can abut against the rear wall to prevent over-insertion. This ensures that the relative distance between the water spray rotating component 34, the guide seat 20, and the water distribution component 40 is constant, so that the alignment accuracy of the channel can be maintained for a long time. It is understood that the stop portion 15 includes, but is not limited to, an annular flange or a partially protruding structure.

[0049] Reference Figures 1 to 11In this embodiment of the invention, the nozzle is further provided with an elastic element 50, which is disposed between the outer wall of the nozzle body 10 and the nozzle cover 33. The inner wall of the nozzle cover 33 is further provided with a second limiting protrusion 335 and a third limiting protrusion 336, as well as a limiting groove 337 formed in the second limiting protrusion 335 and the third limiting protrusion 336. The limiting groove 337 is located on the opposite side of the mounting groove 334. One end of the elastic element 50 abuts against the nozzle body 10, and the other end is embedded in the limiting groove 337, so that when the nozzle cover 33 is rotated to the first position or the second position, it abuts against the nozzle body 10 through the second limiting protrusion 335 or the third limiting protrusion 336.

[0050] Specifically, this design incorporates an elastic element 50 between the outer wall of the nozzle body 10 and the inner wall of the nozzle cover 33. One end of the elastic element 50 rests against the nozzle body 10, while the other end is embedded in a limiting groove 337 formed by the second limiting protrusion 335 and the third limiting protrusion 336. When the user rotates the nozzle cover 33 to switch water output modes, the elastic element 50 is compressed or released with the rotation. When the nozzle cover 33 rotates to a preset first position (main mode) or second position (secondary mode), the corresponding second limiting protrusion 335 or third limiting protrusion 336 axially abuts against the mating surface on the nozzle body 10. The second limiting protrusion 335 or the third limiting protrusion 336 abuts against the nozzle body 10 to prevent the nozzle cover 33 from deviating from its set position due to water flow vibration or accidental contact during use, ensuring that the spray hole is always aligned with the connecting hole 21 and the main spray hole 31 or multiple auxiliary spray holes 32. In addition, the limiting groove 337 is set on the opposite side of the mounting groove 334, making reasonable use of the circumferential space of the inner cavity of the nozzle cover 33. This ensures that the axial limiting (stop part 15 and mounting groove 334) and the circumferential positioning (elastic member 50 and the second limiting protrusion 335 or the third limiting protrusion 336) do not interfere with each other in structure and complement each other in function, resulting in a compact structure.

[0051] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A multi-orifice nozzle, used in a dental flosser, characterized in that, include: The nozzle body has a water outlet channel, one end of which is the water outlet end and the other end is the water inlet end. The water inlet end is used to be installed on the body of the water flosser. A flow guide seat is provided at the water outlet end, and the flow guide seat is provided with a connecting hole that is connected to the water outlet channel; The water outlet switching assembly has a main water spray hole and multiple auxiliary water spray holes. The water outlet switching assembly is movably disposed on the guide seat along the water outlet direction of the water outlet channel so that the water outlet switching assembly has a first position and a second position. In the first position, the main water jet hole is aligned and connected with the connecting hole, so that the water flow sequentially passes through the water outlet channel, the connecting hole and the main water jet hole. In the second position, the plurality of auxiliary water jets are aligned and connected with the connecting hole, so that water flows out sequentially through the water outlet channel, the connecting hole and the auxiliary water jets.

2. The multi-hole nozzle according to claim 1, characterized in that, The multi-hole nozzle further includes a water distribution component, which has a first through hole and multiple second through holes. The diameter of the first through hole is larger than the diameter of the second through hole, and the multiple second through holes are arranged around the first through hole. The water distribution component is connected to the end of the water outlet switching assembly away from the guide seat and rotates synchronously with the water outlet switching assembly. In the first position, the main water jet hole is connected to the first through hole; in the second position, the auxiliary water jet hole is connected to the second through hole.

3. The multi-hole nozzle according to claim 2, characterized in that, The water outlet switching assembly includes a nozzle cover and a water spray rotating component. The water spray rotating component is provided with the main water spray hole and the auxiliary water spray hole. The water spray rotating component is movably disposed on the flow guide seat. The nozzle cover is rotatably connected to the water spray rotating component and is used to drive the water spray rotating component to rotate relative to the flow guide seat so that the main water spray hole or the auxiliary water spray hole communicates with the connecting hole.

4. The multi-hole nozzle according to claim 3, characterized in that, The water spray rotating component has a first flat portion and a second flat portion disposed opposite to each other. The inner wall of the nozzle cover is provided with a first locking portion and a second locking portion. The first locking portion and the first flat portion form a circumferential locking engagement, and the second locking portion and the second flat portion form a circumferential locking engagement, so that the nozzle cover and the water spray rotating component are fixed relative to each other in the circumferential direction. When the nozzle cover rotates, it can drive the water spray rotating component to rotate; and / or The inner wall of the nozzle cover is provided with a limiting member, which is arranged in a ring along the inner wall of the nozzle cover. The nozzle body is provided with a first limiting protrusion, which is located on the side of the limiting member in the water outlet direction. The first limiting protrusion cooperates with the limiting member and abuts against the limiting member in the axial direction to prevent the nozzle cover from falling off the nozzle body.

5. The multi-hole nozzle according to claim 3, characterized in that, The water spray rotating component has an inlet surface and an outlet surface arranged opposite to each other, with the inlet surface facing the outlet end; wherein, the outlet surface is recessed in a groove and forms a first water flow path with the connecting hole, the first water flow path being connected to the main water spray hole; the inlet surface is recessed in an annular cavity and forms a second water flow path with the connecting hole, the second water flow path being connected to a plurality of the auxiliary water spray holes; the guide seat is disposed on the inlet surface and covers the annular cavity.

6. The multi-hole nozzle according to claim 5, characterized in that, The annular cavity is further provided with a third through hole and a fourth through hole arranged opposite to each other. The bottom surface of the annular cavity is constructed as an inclined surface, which has the maximum depth on the side close to the third through hole and the fourth through hole, and the depth gradually increases radially outward toward the third through hole and the fourth through hole. The groove extends radially and its extension direction intersects the central axis of the main water jet hole.

7. The multi-orifice nozzle according to claim 5, characterized in that, The flow guide seat has a first flow guide surface and a second flow guide surface that are arranged opposite to each other. The first flow guide surface is arranged towards the water outlet end, and the second flow guide surface is recessed to form a flow guide cavity. The connecting hole includes a first connecting hole and a second connecting hole. The first connecting hole and the second connecting hole are spaced apart on the flow guide cavity and are connected to the main water spray hole or multiple auxiliary water spray holes.

8. The multi-hole nozzle according to claim 3, characterized in that, A first sealing element is provided at the connection between the nozzle cover and the nozzle body; and / or A second sealing element is provided at the connection between the flow guide seat and the water outlet switching component.

9. The multi-hole nozzle according to claim 3, characterized in that, The nozzle body is provided with a stop portion, and the inner wall of the nozzle cover is formed with an installation groove. The stop portion is at least partially embedded in the installation groove and cooperates with the end wall of the installation groove to limit the movement of the water outlet switching component along the water outlet direction, so that the nozzle body can switch between the first position and the second position.

10. The multi-hole nozzle according to claim 9, characterized in that, The nozzle is further provided with an elastic element, which is disposed between the outer wall of the nozzle body and the nozzle cover. The inner wall of the nozzle cover is further provided with a second limiting protrusion and a third limiting protrusion, as well as a limiting groove formed on the second limiting protrusion and the third limiting protrusion. The limiting groove is located on the side opposite to the mounting groove. One end of the elastic element abuts against the nozzle body, and the other end is embedded in the limiting groove, for abutting against the nozzle body through the second limiting protrusion or the third limiting protrusion when the nozzle cover is rotated to the first position or the second position.

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