Oral irrigator

Abstract

An oral irrigator (10), comprising a nozzle (4), a housing (40), and a machine core (50). The machine core (50) comprises a spherical rotor pump (2) arranged in an accommodating cavity (12); the spherical rotor pump (2) comprises a pump housing (21), a driving rotor (22), and a driven rotor (23); the pump housing (21), the driving rotor (22), and the driven rotor (23) define volume-variable cavities (24) which are spaced apart; in the process of the driving rotor (22) driving the driven rotor (23) to rotate together, the positions of the volume-variable cavities (24) are changed in the circumferential direction, the volume of the volume-variable cavities (24) is increased when the volume-variable cavities (24) are communicated with a water inlet (211), and the volume of the volume-variable cavities (24) is reduced when the volume-variable cavities (24) are communicated with a water outlet (212); and in the running process of the driving rotor (22), the water inlet (211) is always communicated with a water storage cavity (5), and the water outlet (212) is always communicated with the nozzle (4).

Description

Water flosser Technical Field

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

[0002] An oral irrigator is a tool that uses pulsed water flow to clean teeth and between teeth.

[0003] Typically, a water flosser has a body with a plunger pump installed inside. The plunger pump has a water inlet and a water outlet. To control the water flow at these inlets and outlets, both are equipped with one-way valves. However, the one-way valves generate noise when opening or closing the water channel, making the water flosser noisy during operation. In addition, the one-way valves can permanently deform if opened and closed for long periods of time, and failure of the one-way valves can shorten the lifespan of the water flosser.

[0004] Summary of the Invention

[0005] The present application provides a water flosser, comprising a nozzle, a shell and a movement, wherein a accommodating chamber and a water storage chamber are formed in the shell, the movement comprises a spherical rotor pump arranged in the accommodating chamber, and the nozzle is connected to the movement; the spherical rotor pump comprises a pump shell, an active rotor and a driven rotor, a water inlet and a water outlet are formed on the pump shell, the active rotor and the driven rotor are both arranged in the inner cavity of the pump shell and rotatably connected to the pump shell, the pump shell, the active rotor and the driven rotor are enclosed to form a variable capacity chamber, in the process of the active rotor driving the driven rotor to rotate together, the position of the variable capacity chamber changes in the circumferential direction, and the volume of the variable capacity chamber changes periodically, the volume of the variable capacity chamber increases when it is connected to the water inlet, and the volume of the variable capacity chamber decreases when it is connected to the water outlet; wherein, during the operation of the active rotor, the water inlet is always connected to the water storage chamber, and the water outlet is always connected to the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIG1 is a schematic diagram of the structure of a water flosser provided in an embodiment of the present application;

[0007] FIG2 is a schematic diagram of a partial structure of a water flosser provided in an embodiment of the present application;

[0008] FIG3 is an exploded view of a spherical rotor pump in a dental flosser provided in an embodiment of the present application;

[0009] FIG4 is a cross-sectional view of a spherical rotor pump in a dental flosser provided in an embodiment of the present application;

[0010] FIG5 is a cross-sectional view of a partial structure of a water flosser provided in an embodiment of the present application;

[0011] FIG6 is an exploded view of the spherical rotor pump in the oral irrigator provided in an embodiment of the present application;

[0012] FIG7 is a schematic diagram of the exploded structure of the active rotor and the driven rotor in the oral irrigator provided in an embodiment of the present application;

[0013] FIG8 is a schematic structural diagram of FIG7 from another perspective;

[0014] FIG9 is a schematic diagram of the three-dimensional structure of a spherical rotor pump in a dental flosser provided in an embodiment of the present application;

[0015] FIG10 is a schematic diagram of the planar structure along direction A of FIG9;

[0016] FIG11 is a cross-sectional view of the spherical rotor pump in the oral irrigator provided in an embodiment of the present application in another state;

[0017] FIG12 is a schematic structural diagram of the second housing of the oral irrigator provided in an embodiment of the present application;

[0018] FIG13 is a cross-sectional view of FIG12 along the BB direction;

[0019] FIG14 is an enlarged schematic diagram of the local structure at point C in FIG2 ;

[0020] FIG15 is a schematic diagram of the structure of the slow-release device in the oral irrigator provided in an embodiment of the present application.

[0021] Explanation of Reference Numerals: 1. Body; 2. Spherical Rotor Pump; 3. Water Tank; 4. Nozzle; 5. Water Storage Chamber; 6. Mounting Bracket; 7. Seal; 8. Water Intake Pipe; 9. Water Outlet Pipe; 10. Water Flosser; 21. Pump Housing; 22. Driving Rotor; 23. Driven Rotor; 24. Variable Capacity Chamber; 25. Bearing; 11. Locking Member; 12. Accommodating Chamber; 20. Slow Release Device; 30. Motor; 40. Housing; 50. Movement; 60. First Partition; 211, water inlet; 212, water outlet; 213, inner cavity; 214, fixing seat; 215, through hole; 216, first shell; 217, second shell; 218, groove; 219, rotating part; 220, pump housing; 230, boss structure; 221, first rotor body; 222, first rotor shaft; 223, pin shaft; 231, second rotor body; 232, second rotor shaft; 233, matching cavity; 201, protective shell; 202, slow-release member; 203, filter element; 2161, first boss; 2162, first connecting hole; 2171, second boss; 2172, water inlet channel; 2173, water outlet channel; 2174, Second connecting hole; 2231, first plane; 2232, first mating surface; 2311, second mating surface; 2011, liquid hole; 2012, protective cavity. DETAILED DESCRIPTION

[0022] The following is a clear and detailed description of the technical solutions in this application in conjunction with the accompanying drawings. In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of this application, "multiple" means two or more than two.

[0023] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0024] A water flosser is a tool that uses pulsed water flow to clean teeth and the spaces between teeth. Generally, a water flosser has a body, a water tank, and a nozzle. The water tank and the nozzle are arranged at opposite ends of the body. A plunger pump is provided in the body. The plunger pump has a water inlet and a water outlet. The water inlet is connected to the water tank, and the water outlet is connected to the nozzle. In order to control the water flow at the water inlet and the water outlet, a one-way valve is provided at the water inlet and the water outlet. When the one-way valves at the water inlet and the water outlet are opened or closed, the water in the water tank can be pumped into the nozzle through the plunger pump, and water is sprayed into the oral cavity through the nozzle to clean the oral cavity. However, in the above-mentioned water flosser, the one-way valve will generate noise in the process of opening or closing the water channel, which will make the noise of the water flosser louder when it is in operation. In addition, the one-way valve will undergo permanent deformation during long-term opening and closing, and failure of the one-way valve will affect the service life of the water flosser.

[0025] Therefore, the embodiment of the present application provides a water flosser that produces less noise during use and has a longer service life.

[0026] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] Please refer to Figures 1 to 5. Figure 1 is a schematic diagram of the structure of the water flosser provided in an embodiment of the present application. Figure 2 is a schematic diagram of a partial structure of the water flosser provided in an embodiment of the present application. Figure 3 is an exploded view of the spherical rotor pump in the water flosser provided in an embodiment of the present application. Figure 4 is a cross-sectional view of the spherical rotor pump in the water flosser provided in an embodiment of the present application. Figure 5 is a cross-sectional view of a partial structure of the water flosser provided in an embodiment of the present application. As shown in Figures 1 to 5, this embodiment provides a water flosser 10, comprising a nozzle 4, a housing 40, and a movement 50. The housing 40 comprises a body 1 and a water tank 3. Specifically, when the water tank 3 is movable relative to the body 1, the outer shells of the water tank 3 and the body 1 are collectively referred to as the housing 40. The movement 50 comprises a spherical rotor pump 2. The water tank 3 and the nozzle 4 are disposed at opposite ends of the body 1, and the nozzle 4 is connected to the movement 50. The body 1 has a receiving chamber 12 therein, and a water storage chamber 5 is defined between the water tank 3 and the body 1. The spherical rotor pump 2 is disposed near the water tank 3. In this way, the water path from the water storage chamber 5 to the spherical rotor pump 2 can be shortened, and the idling time of the oral irrigator 10 can be reduced during the startup process, thereby avoiding the spherical rotor pump 2 from failing due to excessive temperature rise caused by idling.

[0028] In some embodiments, to shorten the path for water to flow from the water storage chamber 5 to the spherical rotor pump 2, the spherical rotor pump 2 is positioned closer to the bottom end of the body 1 relative to the top end of the body 1, with the top end positioned above the bottom end in the direction of gravity. This positions the water tank 3 closer to the spherical rotor pump 2, shortening the path for water to flow from the water storage chamber 5 to the spherical rotor pump 2 and improving the performance of the oral irrigator 10 provided in this embodiment.

[0029] Specifically, the spherical rotor pump 2 includes a pump housing 21, a driving rotor 22 and a driven rotor 23. The pump housing 21 is formed with a water inlet 211 and a water outlet 212. The water inlet 211 and the water outlet 212 are both communicated with the inner cavity 213 of the pump housing 21. The water inlet 211 and the water outlet 212 both penetrate the inner wall of the inner cavity 213. The driving rotor 22 and the driven rotor 23 are both arranged in the inner cavity 213. The driving rotor 22 can drive the driven rotor 23 to rotate together. The pump housing 21, the driving rotor 22 and the driven rotor 23 are both arranged in the inner cavity 213. The active rotor 22 and the driven rotor 23 enclose a variable capacity chamber 24. During the process of the active rotor 22 driving the driven rotor 23 to rotate together, the position of the variable capacity chamber 24 changes in the circumferential direction, and the volume of the variable capacity chamber 24 changes periodically. When the variable capacity chamber 24 is connected to the water inlet 211, the volume becomes larger, and when the variable capacity chamber 24 is connected to the water outlet 212, the volume becomes smaller. During the operation of the active rotor 22, the water inlet 211 is always connected to the water storage chamber 5, and the water outlet 212 is always connected to the nozzle 4.

[0030] Thus, in this embodiment, the communication between the variable cavity 24 and the water inlet and the communication between the variable cavity 24 and the water outlet can be realized through the rotation of the active rotor 22 and the driven rotor 23, and the water inlet 211 is always connected to the water storage chamber 5, and the water outlet 212 is always connected to the nozzle 4. Compared with the related art, in which the connection between the water inlet 211 and the water storage chamber 5 is controlled by opening or closing the one-way valve, and the connection between the water outlet 212 and the nozzle 4 is controlled by opening or closing the one-way valve, the water irrigator 10 provided in this embodiment does not need to be opened during use. The sound of the one-way valve opening or closing makes the water flosser 10 provided in this embodiment less noisy during use; in addition, since there is no one-way valve, there will be no problem of the one-way valve deforming and causing failure to affect the service life of the water flosser 10, which makes the service life of the water flosser 10 provided in this embodiment longer; in addition, the absence of a one-way valve can reduce the number of parts used and improve the assembly efficiency of the water flosser 10; and, since there is no one-way valve, the use of the water flosser 10 will not be affected by the use of the one-way valve.

[0031] In some embodiments, to improve the performance of the oral irrigator 10 provided in this embodiment, the water tank 3 and the body 1 are slidably connected to change the volume of the water storage chamber 5. In this way, the user can adjust the relative position between the water tank 3 and the body 1 according to their different needs to meet different needs and improve the performance of the oral irrigator 10 provided in this embodiment.

[0032] As an optional embodiment, the accommodating chamber 12 is separated from the water storage chamber 5 by a first partition 60. A water draw pipe 8 is provided on the first partition 60 and extends into the water storage chamber 5. The water draw pipe 8 is connected to the spherical rotor pump 2. The distance between the free end of the water draw pipe 8 and the bottom of the water storage chamber 5 is between 0.5 mm and 5 mm, for example, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, or 4.5 mm. This allows the spherical rotor pump 2 to extract the clean liquid from the water storage chamber 5 while preventing excess clean liquid from remaining therein.

[0033] The distance between the bottom of the first partition 60 and the bottom of the water storage chamber 5 is less than or equal to 30 mm. For example, 25 mm, 20 mm, 15 mm, 10 mm, 5 mm, etc., is preferably set so that the spherical rotor pump 2 is as close as possible to the bottom wall of the water storage chamber 5, shortening the water path between the spherical rotor pump 2 and the water storage chamber 5.

[0034] Furthermore, in order to shorten the flow path of water in the water-drawing pipe 8, the axis of the water-drawing pipe 8 is parallel to the height direction of the oral irrigator 10. In this way, the water flow path defined in the water-drawing pipe 8 can be shortened.

[0035] In some specific embodiments, the water tank 3 is slidably connected relative to the body 1 between a first position and a second position. In the first position, the water storage chamber 5 has a maximum volume. When the length of the water pumping tube 8 is L1 and the clearance between the bottom wall of the water storage chamber 5 and the bottom end of the body 1 is L2, L2-L1≤5 cm. Thus, by limiting the clearance between the bottom wall of the water storage chamber 5 and the bottom end of the body 1, as well as limiting the relationship between the length of the water pumping tube 8 and L1, not only can the water storage chamber 5 have a sufficiently large volume, but it can also, to a certain extent, avoid the water tank 3 from extending to occupy too much space, thereby further improving the performance of the water irrigator 10 provided in this embodiment. Furthermore, this can prevent the spherical rotor pump 2 from running dry for too long during water inflow, which could lead to burnout.

[0036] In other specific embodiments, the length of the water-drawing pipe 8 is L3, and the spherical rotor pump 2 is connected to the body 1 via a connecting pipe (not shown). The connecting pipe has a length of L4, where L3 + L4 ≤ 15 cm. This limits the length of the water-drawing pipe 8, preventing excessive temperature rise in the spherical rotor pump 2 caused by an excessively long pipe.

[0037] In some embodiments, the active rotor 22 includes a first rotor body 221, a first rotor shaft 222, and a pin portion 223. The first rotor body 221 is rotatably engaged with the cavity wall of the inner cavity 213. The first rotor shaft 222 and the pin portion 223 are connected to opposite ends of the first rotor body 221. The first rotor shaft 222 is connected to a driving member or a driving structure, which is configured to drive the active rotor 22 to rotate. The pin portion 223 extends into the driven rotor 23 and movably engages with the driven rotor 23. The driven rotor 23 includes a second rotor body 231, a second rotor shaft 232, and a mating cavity 233. The first rotor body 221, the second rotor body 231, the pin portion 223, and the pump housing 21 collectively form a variable capacity cavity 24. The pin portion 223 extends into the mating cavity 233 and rotatably engages with the mating cavity 233. A fixing seat 214 is provided in the inner cavity 213. The second rotor shaft 232 extends into the fixing seat 214 and is rotatably connected to the fixing seat 214.

[0038] To allow the volume of the variable cavity 24 to vary, in some embodiments, an angle is formed between the axial direction of the first rotor shaft 222 and the axial direction of the second rotor shaft 232. This allows the volume of the variable cavity 24 to vary as the active rotor 22 drives the driven rotor 23 to rotate.

[0039] 4 , illustratively, the angle between the axial direction of the first rotor shaft 222 and the axial direction of the second rotor shaft 232 may be an obtuse angle. Here, the angle between the axial direction of the first rotor shaft 222 and the axial direction of the second rotor shaft 232 is not specifically limited.

[0040] In some specific embodiments, the pump housing 21 includes a pump housing body 220 and two rotating portions 219 connected to the pump housing body 220. The two rotating portions 219 are arranged opposite each other, and the first rotor shaft 222 is rotationally engaged with one of the two rotating portions 219; the second rotor shaft 232 is rotationally engaged with the other of the two rotating portions 219, and the fixing seat 214 is disposed within the rotating portion 219. This not only enables the second rotor shaft 232 to rotationally engage with the fixing seat 214, but also allows the position of the fixing seat 214 to be defined, facilitating assembly of the spherical rotor pump 2.

[0041] In order to enable the first rotor shaft 222 to be connected to the driving member or driving structure, it is necessary to provide a through hole 215 that is rotatably engaged with the first rotor shaft 222 on the rotating portion 219 that is rotatably engaged with the first rotor shaft 222. By providing the through hole 215, the first rotor shaft 222 can be connected to the driving member or driving structure.

[0042] Furthermore, in order to improve the smoothness of rotation of the first rotor shaft 222, a bearing 25 may be provided between the first rotor shaft 222 and the through hole 215. In this way, the smoothness of rotation of the first rotor shaft 222 can be improved.

[0043] In some optional embodiments, the aforementioned driving member or driving structure may be a motor 30 disposed within the accommodating cavity 12, with the drive shaft of the motor 30 connected to the first rotor shaft 222. The motor 30 is configured to drive the active rotor 22 to rotate the driven rotor 23. This eliminates the need for transmission mechanisms such as gear transmissions and cam-link structures. Since transmission mechanisms generate noise during operation, directly driving the active rotor 22 with the motor 30 can reduce noise.

[0044] It should be noted that the aforementioned connection between the drive shaft of the motor 30 and the first rotor shaft 222 refers to a direct connection between the drive shaft of the motor 30 and the first rotor shaft 222. For example, the drive shaft of the motor 30 and the first rotor shaft 222 may be connected together by welding or by threaded fasteners. The connection method between the drive shaft of the motor 30 and the first rotor shaft 222 is not specifically limited.

[0045] In some embodiments, no position of the drive shaft in the direction from the through hole 215 to the motor 30 is lower than the through hole 215. Thus, even if the fluid medium in the spherical rotor pump 2 leaks from the through hole 215, the fluid medium will not flow to the drive shaft due to gravity, thereby preventing the leaked fluid medium from spreading along the drive shaft and corroding the motor 30. This prevents water leakage from the spherical rotor pump 2 from damaging the motor 30, thereby ensuring the service life of the oral irrigator 10.

[0046] Optionally, the water storage chamber 5 is located below the accommodating chamber 12, and the spherical rotor pump 2 and motor 30 are arranged horizontally along the body 1. The water storage chamber 5 can be located below the accommodating chamber 12 to prevent the fluid medium within the water storage chamber 5 from flowing into the accommodating chamber 12 under the action of gravity, thereby improving the safety of components within the accommodating chamber 12. The spherical rotor pump 2 and motor 30 are arranged horizontally along the body 1. This reduces the vertical space occupied by the spherical rotor pump 2 and motor 30, thereby further increasing the space within the water storage chamber 5 to accommodate more water or other fluid media.

[0047] In other embodiments, the spherical rotor pump 2 and the motor 30 are arranged at an angle within the mounting cavity. This reduces the vertical relative area between the motor 30 and the spherical rotor pump 2 in the housing 1, thereby preventing water leaking from the spherical rotor pump 2 from flowing toward the motor 30 under the action of gravity.

[0048] Optionally, the water outlet 212 is located above the pump housing 21. It is understandable that the water outlet 212 of the pump housing 21 is connected to the nozzle 4 through the water outlet pipe, so that the fluid medium in the spherical rotor pump 2 can be sprayed out through the nozzle 4. The nozzle 4 is located above the spherical rotor pump 2. In this way, the phenomenon of the water outlet pipe being bent multiple times and causing the aperture of the water pipe to change can be reduced, and the flow rate of the water flow can be avoided to a certain extent. Specifically, the water outlet 212 is opened above the pump housing 21 so that the water outlet 212 is closer to the nozzle 4. In other embodiments, the water outlet 212 is extended in the horizontal direction of the pump housing 21, so that the water outlet pipe can be easily installed.

[0049] Optionally, the pump housing 21 and the motor 30 are arranged along the vertical direction of the body 1, that is, the pump housing 21 is located directly below the motor 30, which can effectively reduce the volume occupied by the pump housing 21 and the motor 30 in the horizontal direction of the body 1; at the same time, since the battery and circuit board in the body 1 can be arranged in a long strip shape, it is also convenient to arrange the battery and the circuit board in adjacent positions in the horizontal direction of the body 1, so that the arrangement in the accommodating cavity 12 is more compact, thereby further reducing the volume of the water flosser 10.

[0050] Furthermore, the length extension direction of the drive shaft is the same as the length extension direction of the fuselage 1, and the extension direction of the second rotor shaft 232 is arranged at an angle to the drive shaft. In the axial projection along the drive shaft, the outer contour of the pump housing 21 is located within the outer contour of the motor 30. Thus, based on the vertical arrangement of the pump housing 21 and the motor 30 along the fuselage 1, the installation width of the motor 30 within the accommodating chamber 12 is greater than the installation width of the pump housing 21 within the accommodating chamber 12. Therefore, when installing the motor 30 and the spherical rotor pump 2, by retaining space within the accommodating chamber 12 for the installation width of the motor 30, the pump housing 21 can also be accommodated without the need for additional measurements, thereby facilitating installation and improving installation efficiency.

[0051] In other embodiments, the second rotor shaft 232 extends in the same direction as the length of the pump body 1, and the drive shaft extends at an angle to the driven rotor 23. In a projection along the extension direction of the second rotor shaft 232, the outer contour of the motor 30 lies within the outer contour of the pump housing 21. Thus, with the pump housing 21 and motor 30 arranged vertically along the pump body 1, the installation width of the motor 30 within the accommodating chamber 12 is smaller than the installation width of the pump housing 21 within the accommodating chamber 12. Therefore, when installing the motor 30 and the spherical rotor pump 2, only space sufficient to accommodate the installation width of the pump housing 21 is required within the accommodating chamber 12 to accommodate the motor 30, eliminating the need for additional measurements. This facilitates installation and improves installation efficiency.

[0052] In some optional embodiments, the drive shaft and the first rotor shaft 222 are fixed together by a pin connection. In this way, there is no need for a transmission mechanism such as a transmission gear, which can streamline the structure between the motor 30 and the spherical rotor pump 2 and reduce noise. The small axial dimensions of the motor 30 and the spherical rotor pump 2 allow for more space within the body 1, further reducing the size of the oral irrigator 10 and facilitating a miniaturized design of the product.

[0053] The oral irrigator 10 provided in this embodiment may also include a second partition (not shown in the figure), which is connected to the body 1 to separate the accommodating chamber 12 into a first chamber (not shown in the figure) and a second chamber (not shown in the figure). The second partition is provided with a through hole connecting the first chamber and the second chamber. The motor 30 is located in the first chamber, and the spherical rotor pump 2 is located in the second chamber. The drive shaft passes through the above-mentioned through hole to penetrate the through hole 215 and is connected to the spherical rotor pump 2. Among them, the accommodating chamber 12 is separated into the first chamber and the second chamber by the second partition, so that the motor 30 and the spherical rotor pump 2 are respectively located in the two chambers. Only by passing the drive shaft through the through hole of the second partition and connecting with the first rotor shaft 222, the waterproof effect of the motor 30 can be further improved, and the possibility of the fluid medium such as water in the spherical rotor pump 2 directly flowing to the motor 30 can be further reduced.

[0054] Optionally, the electrical connection wires of the motor 30 are located on a side of the motor 30 away from the through hole 215. The electrical connection wires of the motor 30 can be electrically connected to a circuit board or a battery. By locating the electrical connection wires on the side of the motor 30 away from the through hole 215, that is, away from water leaks in the spherical rotor pump 2, the waterproofing of the motor 30 is further improved.

[0055] In some embodiments, the through hole 215 is located below the motor 30. By completely positioning the through hole 215 below the motor 30, water or other fluid media leaking from the through hole 215 is prevented from flowing directly toward the motor 30 under the action of gravity. This prevents damage to the motor 30 caused by water leakage from the spherical rotor pump 2, thereby ensuring the service life of the oral irrigator 10. Of course, in other embodiments, the through hole 215 may be flush with the motor 30, or a portion of the through hole 215 may be positioned below the motor 30. The specific selection can be made by those skilled in the art based on the waterproofing effect.

[0056] In the oral irrigator 10 provided in this embodiment, the movement 50 may further include a water baffle (not shown in the figure), which is connected to the drive shaft and is located on the side of the through hole 215 facing the motor 30. The water baffle can block water from splashing out of the through hole 215 of the pump housing 21 of the spherical rotor pump 2, thereby further improving the waterproof effect on the motor 30.

[0057] Please refer to Figures 6 to 8. Figure 6 is an exploded view of the spherical rotor pump in the oral irrigator provided in an embodiment of the present application. Figure 7 is an exploded structural schematic diagram of the active rotor and driven rotor in the oral irrigator provided in an embodiment of the present application. Figure 8 is a structural schematic diagram of Figure 7 from another perspective. As shown in Figures 6 to 8, the first rotor body 221 and the second rotor body 231 form a spherical rotor. The active rotor 22 also includes a pin portion 223, which is connected to the first rotor shaft 222 at opposite ends of the first rotor body 221. The second rotor body 231 has a mating cavity 233 that rotatably engages with the pin portion 223. The pin end surfaces at both ends of the pin portion 223 each include a first flat surface 2231, and the plane on which the first flat surface 2231 lies intersects the axial direction of the pin portion 223.

[0058] It should be noted that the pin shaft portion 223 can be a cylinder or a partial cylindrical structure of a cylinder. The axial direction of the pin shaft portion 223 refers to the direction parallel to the axis of the pin shaft portion 223. When the pin shaft portion 223 is in the shape of a long strip, the axial direction of the pin shaft portion 223 is parallel to the length direction of the pin shaft portion 223; the plane where the first plane 2231 is located intersects with the axial direction of the pin shaft portion 223, which means that the plane where the first plane 2231 is located is not parallel to the axial direction of the pin shaft portion 223, and the plane where the first plane 2231 is located forms an angle with the axial direction of the pin shaft portion 223.

[0059] In some embodiments, the plane where the first plane 2231 is located can be perpendicular to the axial direction of the pin shaft portion 223. Of course, the angle formed by the plane where the first plane 2231 is located and the axial direction of the pin shaft portion 223 can also be other angles, such as: 30 degrees, 45 degrees, 60 degrees or 75 degrees, etc.

[0060] It is understandable that in the related art, the end faces of both ends of the pin shaft portion 223 are usually spherical arc surfaces, resulting in the pin shaft end faces at both ends of the pin shaft portion 223 protruding from the first rotor body 221. When a single-sided demolding mold is used to form the active rotor 22, the pin shaft end face of the pin shaft portion 223 is wrapped by the mold, resulting in the mold easily forming an undercut at the pin shaft end face, making demolding difficult. When a double-sided demolding mold is used to form the active rotor 22, although the problem of difficult demolding can be solved, a parting line will be formed at the parting surface during double-sided demolding, and the accuracy of the spherical surface of the active rotor 22 cannot be guaranteed, which is prone to manufacturing defects such as poor installation and fit.

[0061] In the present application, at least a portion of the pin end face of the pin portion 223 is a first plane 2231 intersecting the axial direction of the pin portion 223, which can reduce the protrusion of the pin end face, so that when the active rotor 22 is formed by a single-sided demolding mold, the mold is not likely to form an undercut at the pin end face of the pin portion 223, making demolding more convenient, so that the active rotor 22 can be normally formed by a single-sided demolding mold, without the need to use a double-sided demolding mold to form the active rotor 22, which can ensure the accuracy of the spherical surface of the active rotor 22, making it less likely for the active rotor 22 to get stuck during rotation, and at the same time, there is no need to perform secondary processing on the parting line, which can improve the production qualification rate of the active rotor 22 and reduce the production cost of the spherical rotor pump.

[0062] It should also be noted that the pin end face can include only the first plane 2231. In this case, the first plane 2231 is the pin end face, which can significantly reduce the protrusion of the pin end face, making demolding more convenient when using a single-sided demolding mold to form the active rotor 22. The pin end face can also include the first plane 2231 and a curved surface. On the basis of reducing the protrusion of the pin end face, the connection tightness between the pin end face and the inner wall of the inner cavity 213 can be improved, thereby improving the sealing between the pin end face and the inner wall of the inner cavity 213. In some embodiments of the present application, the first plane 2231 is circular in shape, which can avoid the first plane 2231 having an angular structure, thereby preventing the angular structure from rubbing against the inner wall of the inner cavity 213 during the rotation of the spherical swivel and affecting the normal rotation of the spherical swivel.

[0063] Furthermore, the diameter of the first plane 2231 is R1, and the diameter of the pin shaft portion 223 is R2. To ensure that the area of ​​the first plane 2231 is large enough, when the active rotor 22 is formed by a single-side demoulding mold, the mold is not likely to form an undercut at the pin end face of the pin portion 223, making demoulding more convenient. R1 can be equal to Or R2, etc.

[0064] When R1 is equal to R2, the first plane 2231 is the pin end face. This can minimize the possibility of the mold forming an undercut at the pin end face of the pin portion 223 when the active rotor 22 is formed using a single-side demoulding mold.

[0065] In some embodiments of the present application, the diameter of the spherical rotor is R3. It can be understood that the driving rotor 22 and the driven rotor 23 are driven by the pin shaft portion 223. The pin shaft portion 223 serves as a supporting structure between the driving rotor 22 and the driven rotor 23. When the spherical rotor rotates, the pin shaft portion 223 will bear the extrusion stress and part of the friction force of the driving rotor 22 and the driven rotor 23. The pin shaft portion 223 will be subjected to the extrusion force and the steering force. When the diameter R2 of the pin shaft portion 223 is less than When the diameter R2 of the pin shaft portion 223 is too small, it is difficult to ensure that the pin shaft portion 223 has sufficient structural strength. The pin shaft portion 223 is easily crushed or excessively worn, resulting in the active rotor 22 and the driven rotor 23 being unable to cooperate, thereby causing the spherical rotor pump to malfunction. As the diameter R2 of the pin shaft portion 223 increases, the volume of the variable volume cavity 24 decreases. When the diameter R2 of the pin shaft portion 223 is greater than When the diameter R2 of the pin shaft portion 223 is too large, the volume of the variable cavity 24 will be too small, thereby affecting the pumping efficiency of the spherical rotor pump 2. In addition, the larger the diameter R2 of the pin shaft portion 223, the larger the size of the pin shaft end face. When the active rotor 22 is formed by using a single-sided demolding mold, the mold is more likely to form an undercut at the pin shaft end face of the pin shaft portion 223, and the sealing between the pin shaft end face and the inner wall surface of the inner cavity 213 is more difficult to ensure, making it easy for the liquid in the variable cavity 24 to leak out through the gap between the pin shaft end face and the inner wall surface of the inner cavity 213. Among them, R2 can be equal to or wait.

[0066] In some embodiments of the present application, the length of the pin shaft portion 223 is L. It should be noted that if the length L of the pin shaft portion 223 is too small, it is difficult to ensure that the pin shaft portion 223 has sufficient structural strength. The pin shaft portion 223 is easily crushed or excessively worn, resulting in the active rotor 22 and the driven rotor 23 being unable to cooperate, thereby causing the spherical rotor pump 2 to not work properly. If the length L of the pin shaft portion 223 is too large, the pin shaft end face of the pin shaft portion 223 is likely to protrude from the first rotor body 221. When the active rotor 22 is formed by using a single-sided demolding mold, the mold is more likely to form an undercut at the pin shaft end face of the pin shaft portion 223, and the sealing between the pin shaft end face and the inner wall surface of the inner cavity 213 is more difficult to ensure, so that the liquid in the variable cavity 24 is likely to leak out through the gap between the pin shaft end face and the inner wall surface of the inner cavity 213. Wherein, L can be equal to or wait.

[0067] Furthermore, the diameter of the pin portion 223 is greater than 2 mm. The diameter of the pin portion 223 can be 3 mm, 4 mm, 5 mm, etc. By limiting the diameter of the pin portion 223 to be greater than 2 mm, the structural strength of the pin portion 223 is ensured, and the deviation of the active rotor 22 due to insufficient strength of the pin portion 223 is avoided, thereby ensuring the rotational stability of the active rotor 22.

[0068] In some embodiments of the present application, 10 mm ≤ R3 ≤ 18 mm. It should be noted that when the shape of the pin end face of the pin portion 223 changes, the sealing performance of the variable cavity 24 will be reduced, thereby reducing the pumping efficiency of the spherical rotor pump 2. The pumping efficiency of the spherical rotor pump 2 is also related to the ball diameter R3 of the spherical rotor. The larger the ball diameter R3 of the spherical rotor, the higher the pumping efficiency of the spherical rotor pump 2. Therefore, when the ball diameter R3 of the spherical rotor is too small, the pumping efficiency of the spherical rotor pump 2 cannot meet the product performance requirements of the oral irrigator 10 provided in this embodiment.

[0069] In addition, the size of the pump housing 21 depends on the ball diameter R3 of the spherical rotor. Generally speaking, the larger the ball diameter R3 of the spherical rotor, the larger the size of the pump housing 21. When the spherical rotor pump 2 is applied to the oral irrigator 10, since the size of the oral irrigator 10 is generally fixed, the size of the motor 30 installed in the oral irrigator 10 is also relatively fixed. The spherical rotor pump 2 will occupy more lateral space because it protrudes from the motor 30, which will reduce the space utilization of the oral irrigator 10, where the lateral direction is perpendicular to the length direction of the oral irrigator 10.

[0070] In some embodiments, 11 mm ≤ R3 ≤ 14 mm, where R3 can be 11 mm, 12 mm, 12.5 mm, 13 mm, 14 mm, or other values.

[0071] In other embodiments, the diameter of the spherical body is greater than 6 mm. The diameter of the spherical body can be 7 mm, 8 mm, 9 mm, etc. In this way, the volume of the spherical body can be guaranteed, and the situation of excessive heating and easy jamming caused by the volume of the spherical body being too small can be avoided, thereby ensuring the normal rotation of the driving rotor 22 and the driven rotor 23.

[0072] In some embodiments of the present application, the active rotor 22 is a plastic rotor, that is, the active rotor 22 is made of plastic, which has a low density. On the basis of keeping the volume of the active rotor 22 unchanged, the weight of the active rotor 22 can be reduced, thereby reducing the weight of the spherical rotor pump 2. In addition, the active rotor 22 can be integrally injection molded with plastic, thereby reducing machining and improving product production efficiency.

[0073] It should also be noted that the driven rotor 23 may also be a plastic rotor, so that the driven rotor 23 is lighter, thereby further reducing the weight of the spherical rotor pump 2 .

[0074] The active rotor 22 or the driven rotor 23 can be made of a plastic material such as PC (Poly Carbonates), PET (Poly Ethylene Terephthalate), PP (Poly Propylene), or POM (Poly Oxy Methylene). Because plastics are easily manufactured, the active rotor 22 or the driven rotor 23 can be integrally injection molded, improving production efficiency. To further enhance production efficiency, both the active rotor 22 and the driven rotor 23 can be made of plastic.

[0075] In another embodiment, the driving rotor 22 or the driven rotor 23 is made of a metal material. Specifically, the driving rotor 22 or the driven rotor 23 can be integrally formed from a self-lubricating metal material such as copper, steel, aluminum, or an alloy through metal forging or machining. This ensures that the driving rotor 22 or the driven rotor 23 has high structural strength, is not easily crushed, is wear-resistant, has a long service life, and is not prone to water leakage even after prolonged use. Of course, to further improve production efficiency, both the driving rotor 22 and the driven rotor 23 can be made of plastic.

[0076] In some embodiments of the present application, a gap exists between the spherical rotor and the inner wall of the inner cavity 213, and the distance between the spherical rotor and the inner wall of the inner cavity 213 is greater than or equal to 0.01 mm and less than or equal to 0.03 mm. It is understood that when the distance between the spherical rotor and the inner wall of the inner cavity 213 is less than 0.01 mm, the distance between the spherical rotor and the inner wall of the inner cavity 213 is too small, and particulate impurities are easily stuck between the spherical rotor and the inner wall of the inner cavity 213, causing the spherical rotor to become stuck; when the distance between the spherical rotor and the inner wall of the inner cavity 213 is greater than 0.03 mm, the distance between the spherical rotor and the inner wall of the inner cavity 213 is too large, and the sealing between the spherical rotor and the inner wall of the inner cavity 213 is poor, resulting in water leakage in the variable cavity 24, which affects the pumping efficiency of the spherical rotor pump. The distance between the spherical rotor and the inner wall of the inner cavity 213 may be 0.01 mm, 0.02 mm, 0.03 mm or other values.

[0077] In one embodiment of the present application, the edge of the pin end face is in contact with the inner wall of the inner cavity 213, so that the variable cavity 24 is not prone to water leakage during the rotation of the spherical rotator.

[0078] In order to install the motor 30 , a mounting bracket 6 may be provided in the accommodating cavity 12 , and the motor 30 is mounted on the mounting bracket 6 .

[0079] Furthermore, to prevent the spherical rotor pump 2 from being suspended in mid-air, the pump housing 21 can be made to abut against the inner wall of the accommodating chamber 12. Specifically, the end of the pump housing 21 facing away from the motor 30 can be made to abut against the inner wall of the accommodating chamber 12. That is, the outer wall of the end of the pump housing 21 connected to the driven rotor 23 can be made to abut against the inner wall of the accommodating chamber 12. In this way, the spherical rotor pump 2 can be prevented from being suspended in mid-air, and the spherical rotor pump 2 can be prevented from generating loud noise due to large amplitude.

[0080] Referring to FIG2 , for example, when the motor 30 is located at the top of the spherical rotor pump 2, the bottom end of the spherical rotor pump 2 can abut against the inner wall of the accommodating chamber 12. Furthermore, when the motor 30 and the spherical rotor pump 2 are arranged horizontally in FIG2 , the side of the spherical rotor pump 2 facing away from the motor 30 can abut against the inner wall of the accommodating chamber 12. The relative positions of the motor 30 and the spherical rotor pump 2 are not specifically limited.

[0081] Since the spherical rotor pump 2 vibrates and generates noise during the operation of the oral irrigator 10, a first buffer member (not shown) can be provided between the pump housing 21 and the inner wall of the accommodating chamber 12 to prevent the vibration of the spherical rotor pump 2 from generating noise. The provision of the first buffer member can thus mitigate the vibration of the spherical rotor pump 2 and reduce noise.

[0082] Furthermore, since the motor 30 also vibrates and generates noise during the operation of the dental flosser 10, a second buffer (not shown) can be provided between the motor 30 and the mounting bracket 6. The provision of the second buffer can slow down the vibration of the motor 30 to further reduce the noise.

[0083] In some specific embodiments, the first buffer member and the second buffer member may be made of elastic materials, such as rubber, etc. Here, there is no limitation on the types of materials used to make the first buffer member and the second buffer member.

[0084] In other embodiments, the spherical rotor pump 2 is spaced apart from the inner wall of the accommodating chamber 12 along the circumference of the oral irrigator 10. This can, to a certain extent, prevent the vibration generated by the spherical rotor pump 2 during operation from being transmitted to the inner wall of the accommodating chamber 12, thereby making the oral irrigator 10 provided in this embodiment have better performance.

[0085] In some optional embodiments, to reduce noise generated during the rotation of the active rotor 22, at least one of the active rotor 22, the driven rotor 23, and the pump housing 21 is filled with carbon fiber. In other words, at least one of the active rotor 22, the driven rotor 23, and the pump housing 21 is made of a material mixed with carbon fiber. The materials used to make the active rotor 22, the driven rotor 23, or the pump housing 21 are not limited. This improves the lubrication capacity of the active rotor 22 and / or the driven rotor 23 and / or the pump housing 21, allowing the active rotor 22 to rotate more smoothly relative to the pump housing 21, thereby reducing noise generated during the rotation of the active rotor 22.

[0086] Please continue to refer to Figures 9 and 10. Figure 9 is a schematic diagram of the three-dimensional structure of the spherical rotor pump in the water flosser provided in an embodiment of the present application, and Figure 10 is a schematic diagram of the planar structure of Figure 9 along direction A. In some optional embodiments, in order to facilitate the assembly of the spherical rotor pump 2, the pump housing 21 includes a first shell 216 and a second shell 217 arranged opposite to each other. The first shell 216 and the second shell 217 each have a rotating portion 219. The first shell 216 and the second shell 217 enclose an inner cavity 213. The through hole 215 is provided on the rotating portion 219 of the first shell 216. The water inlet 211 and the water outlet 212 are formed on the second shell 217, and the driven rotor 23 is located in the second shell 217.

[0087] In order to achieve the connection between the first shell 216 and the second shell 217, the first shell 216 has a first boss 2161 at one end close to the second shell 217, and the second shell 217 has a second boss 2171 at one end close to the first shell 216. The first boss 2161 and the second boss 2171 are abutted together to form a boss structure 230. During the assembly of the spherical rotor pump 2, the first boss 2161 and the second boss 2171 can be fixedly connected and pressed together to connect the first shell 216 and the second shell 217 together.

[0088] For example, the first boss 2161 has a first connection hole 2162, and the second boss 2171 has a second connection hole 2174 opposite to the first connection hole 2162. The first boss 2161 and the second boss 2171 are connected together by a fastener that passes through the first connection hole 2162 and the second connection hole 2174. The connection method between the first housing 216 and the second housing 217 is not specifically limited.

[0089] As shown in FIG4 , during the operation of the oral irrigator 10, the first shell 216 and the second shell 217 may be offset. To prevent relative offset between the first shell 216 and the second shell 217, in some embodiments, a locking member 11 may be provided on the outside of the boss structure 230. The locking member 11 is configured to lock together the first boss 2161 and the second boss 2171. This can generate a force on the first shell 216 and the second shell 217 to prevent offset between the first shell 216 and the second shell 217 to a certain extent, thereby reducing noise. In addition, the sealing performance between the first shell 216 and the second shell 217 can be improved, thereby preventing water leakage to a certain extent.

[0090] In some optional embodiments, the locking member 11 is an elastic member, and the elastic member is sleeved on the outside of the boss structure 230 .

[0091] It should be noted that the elastic member can be a soft rubber elastic member. Here, there is no specific restriction on the material of the elastic member.

[0092] In some embodiments, the first rotor body 221 may include an inner support portion (not shown in the figure) and an outer covering portion (not shown in the figure) wrapped around the outer periphery of the inner support portion, the inner support portion is connected to the first rotor shaft 222, and the inner support portion is made of metal.

[0093] The inner support portion can be made of a metal material such as copper, steel, aluminum, or an alloy, thereby enhancing the overall structural strength of the active rotor 22. The outer covering portion can be directly formed around the outer periphery of the inner support portion, or it can be detachably connected to the inner support portion via a snap-fit ​​mechanism. By making the first rotor body 221 comprise an inner support portion and an outer covering portion, the first rotor body 221 can be made of two separate materials. This ensures the structural strength of the active rotor 22 while also facilitating control of the material of the contact surface between the active rotor 22 and the first housing 216, thereby ensuring the rotational stability of the active rotor 22.

[0094] Furthermore, the first rotor shaft 222 and the inner support portion are integrally formed. This ensures the structural strength of the first rotor shaft 222 . Consequently, when the driving rotor 22 and the driven rotor 23 enclose the inner wall of the pump housing 21 to form multiple variable volume cavities 24 , the first rotor shaft 222 is less likely to deflect due to inconsistent pressure within the multiple variable volume cavities 24 . This prevents the driving rotor 22 from being squeezed against the inner wall of the first housing 216 and causing increased wear, thereby ensuring the normal service life of the driving rotor 22 .

[0095] Optionally, the outer covering is made of a plastic material. The outer covering can be made of PEEK (Poly Ether Ether Ketone), which has a thermal expansion coefficient ranging from 29×10-6 / °C to 50×10-6 / °C, or POM and CF (Carbon Fiber), which have a thermal expansion coefficient of 11×10-6 / °C, or PPS (Poly Phenylene Sulfide) and CF, which have a thermal expansion coefficient ranging from 30×10-6 / °C to 50×10-6 / °C. PPS has very high bonding strength with metal materials to ensure the structural strength of the outer covering, or PTFE (Poly Tetra Fluoro Ethylene) and CF. PTFE has a self-lubricating effect, which is beneficial for the relative movement of the active rotor 22. That is, the outer covering made of the above plastic material has good stability, low shrinkage, temperature resistance of more than 100 degrees Celsius, and wear resistance, so as to ensure the normal use of the active rotor 22.

[0096] In some embodiments, the thermal expansion coefficient of the driving rotor 22 is smaller than the thermal expansion coefficient of the first housing 216 , or the thermal expansion coefficient of the driven rotor 23 is smaller than the thermal expansion coefficient of the second housing 217 .

[0097] Among them, the first shell 216 and the second shell 217 can be made of high-temperature resistant (above 100 degrees Celsius) materials, wear-resistant, self-lubricating materials, such as plastics. It can be understood that the material of the driven rotor 23 is the same as the material of the active rotor 22, and the material of the first shell 216 is the same as the material of the second shell 217. In this way, for the convenience of manufacturing, it is only necessary to control the thermal expansion coefficient of the active rotor 22 to be smaller than the thermal expansion coefficient of the first shell 216 or the thermal expansion coefficient of the driven rotor 23 to be smaller than the thermal expansion coefficient of the second shell 217.

[0098] Since the driving rotor 22 is rotatably connected to the first housing 216, by making the thermal expansion coefficient of the driving rotor 22 smaller than that of the first housing 216, the volume change of the first housing 216 can be greater than that of the driving rotor 22, thereby preventing the gap between the first housing 216 and the driving rotor 22 from decreasing and affecting the rotation of the driving rotor 22. Similarly, since the driven rotor 23 is rotatably connected to the second housing 217, by making the thermal expansion coefficient of the driven rotor 23 smaller than that of the second housing 217, the volume change of the second housing 217 can be greater than that of the driven rotor 23, thereby preventing the gap between the second housing 217 and the driven rotor 23 from decreasing and affecting the rotation of the driven rotor 23. Of course, to further ensure the rotational stability of the driving rotor 22 and the driven rotor 23, the thermal expansion coefficient of the driving rotor 22 can be made smaller than that of the first housing 216, and the thermal expansion coefficient of the driven rotor 23 can be made smaller than that of the second housing 217.

[0099] Optionally, the distance between the center of the inner support portion and the outer periphery of the inner support portion is greater than the distance between the inner periphery and the outer periphery of the outer cover portion. In this way, the inner support portion can provide sufficient support strength for the outer cover portion, thereby improving the overall structural strength of the active rotor 22 and ensuring the rotational stability of the active rotor 22.

[0100] Furthermore, the distance from the inner periphery to the outer periphery of the outer covering portion is greater than 1.5 mm. The distance from the inner periphery to the outer periphery of the covering portion can be 2 mm, 3 mm, 4 mm, etc., thereby ensuring the thickness of the outer covering portion and preventing the outer covering portion from being broken due to insufficient structural strength. This further improves the overall structural strength of the active rotor 22 and ensures the rotational stability of the active rotor 22.

[0101] Optionally, at least a portion of the inner support portion extends into the pin portion 223. Since the pin portion 223 is the main force-bearing portion, the structural strength of the pin portion 223 can be further improved by extending at least a portion of the inner support portion made of metal into the pin portion 223.

[0102] In some embodiments, the gap between the outer periphery of the first rotor body 221 close to the pin shaft portion 223 and the inner wall surface of the first shell 216 is smaller than the gap between the outer periphery of the first rotor body 221 away from the pin shaft portion 223 and the inner wall surface of the first shell 216. In the process of pumping water, there is water in the variable cavity 24, and the water has a cooling ability. Since the part of the first rotor body 221 close to the pin shaft portion 223 is closer to the variable cavity 24, that is, the cooling effect of the part of the first rotor body 221 close to the pin shaft portion 223 is better than the cooling effect of the part of the first rotor body 221 away from the pin shaft portion 223. Therefore, the deformation of the part of the first rotor body 221 away from the pin shaft portion 223 will be greater than the deformation of the part of the first rotor body 221 close to the pin shaft portion 223. In this way, the gap between the outer periphery of the side of the first rotor body 221 close to the pin shaft portion 223 and the inner wall surface of the first shell 216 is smaller than the gap between the outer periphery of the side of the first rotor body 221 away from the pin shaft portion 223 and the inner wall surface of the first shell 216, so as to ensure the normal rotation of the active rotor 22.

[0103] Furthermore, to enhance the sealing performance between the first housing 216 and the second housing 217, a seal 7 may be provided between the first housing 216 and the second housing 217. A groove 218 for the seal 7 to engage is provided in at least one of the first housing 216 and the second housing 217. Thus, when the spherical rotor pump 2 is assembled, the fixed connection and compression between the first housing 216 and the second housing 217, combined with the sealing effect of the seal 7, further enhances the sealing performance between the first housing 216 and the second housing 217.

[0104] In some embodiments, the sealing member 7 may be a sealing ring, and the groove 218 may be an annular groove formed on both the first shell 216 and the second shell 217. The shape of the sealing member 7 and the location of the groove 218 are not particularly limited.

[0105] Furthermore, in some embodiments, the first rotor body 221 includes a first mating surface 2232 located on both sides of the pin shaft portion 223, and the side surface of the second rotor body 231 facing the first rotor body 221 is a second mating surface 2311; the mating cavity 233 is located on the second mating surface 2311, and extends along the axial direction of the pin shaft portion 223 and passes through both sides of the second rotor body 231; wherein, the second mating surface 2311 located on both sides of the mating cavity 233 extends obliquely in a direction away from the mating cavity 233 and away from the first rotor body 221, when the driven rotor 23 rotates to the point where the second mating surface 2311 is opposite to the water inlet 211, or when the second mating surface 2311 is opposite to the water outlet 212, the second mating surface 2311 is located on the side of the water inlet 211 and the water outlet 212 close to the first shell 216, so that the water inlet 211 and the water outlet 212 are connected to the variable cavity 24.

[0106] It should be noted that the variable capacity cavity 24 is defined and formed by the second mating surface 2311, the first rotor body 221 and the inner wall surface of the inner cavity 213. The second mating surface 2311 located on both sides of the mating cavity 233 is inclined, which can increase the volume of the variable capacity cavity 24, thereby improving the pumping efficiency of the spherical rotor pump 2.

[0107] Please continue to refer to Figure 11, which is a cross-sectional view of the spherical rotor pump in the oral irrigator provided in an embodiment of the present application in another state. As shown in Figure 11, in one embodiment of the present application, when the volume of the variable cavity 24 is at its minimum, the first mating surface 2232 and the second mating surface 2311 forming the variable cavity 24 are arranged at an angle. Here, the volume value of the variable cavity 24 when the volume is the smallest is M. It should be noted that, compared with setting the first mating surface 2232 and the second mating surface 2311 that form the variable cavity 24 in parallel, the arrangement of this embodiment can reduce the probability of adhesion between the first mating surface 2232 and the corresponding second mating surface 2311 and ensure that there is space to avoid particulate impurities, so that the value of the variable cavity M is relatively small, so that the impact on the volume change range of the variable cavity 24 is relatively small, thereby having little impact on the pumping efficiency of the spherical rotor pump 2, and the value of M will affect the self-priming effect of the spherical rotor pump 2. The larger M is, the lower the self-priming performance of the spherical rotor pump 2. Therefore, the arrangement of this embodiment can also reduce the impact on the self-priming performance of the spherical rotor pump 2.

[0108] The angle formed by the first mating surface 2232 and the second mating surface 2311 may be 0.5 degrees, 1 degree, 2 degrees, 5 degrees or other values, which is not specifically limited in this application.

[0109] In another embodiment of the present application, when the volume of the variable capacity cavity 24 is minimum, the first mating surface 2232 and the second mating surface 2311 are parallel to each other. It is understandable that, compared to the arrangement in which the first mating surface 2232 and the second mating surface 2311 are arranged at an angle, the arrangement in this embodiment causes the first mating surface 2232 and the second mating surface 2311 to be completely non-contacting, which can further reduce the probability of adhesion between the first mating surface 2232 and the corresponding second mating surface 2311, thereby further improving the reliability of the spherical rotor pump 2. In addition, the spacing between the first mating surface 2232 and the second mating surface 2311 is equal at any position. When the particle size of the particulate impurities is smaller than the spacing between the first mating surface 2232 and the second mating surface 2311, there is space at any position between the first mating surface 2232 and the second mating surface 2311 to avoid the particulate impurities, thereby further reducing the probability of particulate impurities entering the variable capacity cavity 24 and causing wear or jamming of the active rotor 22 or the driven rotor 23.

[0110] In another embodiment of the present application, when the volume of the variable cavity 24 is minimum, the maximum distance between the first mating surface 2232 and the second mating surface 2311 is D, 0.5 mm ≤ D ≤ 2 mm, and D can be 0.5 mm, 1 mm, 1.2 mm, 1.5 mm, 2 mm or other values.

[0111] It should be noted that when the volume of the variable cavity 24 is the smallest, if the first mating surface 2232 and the second mating surface 2311 are set at an angle, at this time, the maximum distance between the first mating surface 2232 and the second mating surface 2311 is at the outer edge of the variable cavity 24. If the first mating surface 2232 and the second mating surface 2311 are parallel to each other, at this time, the distance at any position between the first mating surface 2232 and the second mating surface 2311 is the maximum distance.

[0112] It should also be noted that when D is less than 0.5 mm, the distance between the first mating surface 2232 and the second mating surface 2311 is too small, which makes it easy for particulate impurities to enter the variable volume cavity 24, causing the active rotor 22 or the driven rotor 23 to wear or get stuck; when D is greater than 2 mm, the distance between the first mating surface 2232 and the second mating surface 2311 is too large, which has a greater impact on the pumping efficiency and self-priming effect of the spherical rotor pump 2.

[0113] Please continue to refer to Figures 12 and 13. Figure 12 is a schematic structural diagram of the second housing of the oral irrigator provided in an embodiment of the present application, and Figure 13 is a cross-sectional view of Figure 12 along line BB. As shown in Figures 12 and 13, the spherical rotor pump 2 is formed with a water inlet channel 2172 and a water outlet channel 2173. The water inlet channel 2172 communicates with the water storage chamber 5, and the water outlet channel 2173 communicates with the nozzle 4. The water inlet 211 is formed at the water outlet end of the water inlet channel 2172, and the water outlet 212 is formed at the water inlet end of the water outlet channel 2173.

[0114] In order to reduce the noise generated by the water flow, in some optional embodiments, the water inlet end of the water inlet channel 2172 faces the water storage chamber 5; and / or the water outlet end of the water outlet channel 2173 faces the nozzle 4. In this way, the number of turns of the water flow in the water inlet channel 2172 and the water outlet channel 2173 can be reduced, thereby reducing the noise generated by the water flow.

[0115] Furthermore, in some optional embodiments, the axis of the water inlet channel 2172 is a straight line; and / or the axis of the water outlet channel 2173 is a straight line. This makes the flow direction of the water in the water inlet channel 2172 and the water outlet channel 2173 relatively fixed, further reducing the number of turns of the water in the water inlet channel 2172 and the water outlet channel 2173 and reducing the noise generated by the water flow.

[0116] Please continue to refer to Figure 14, which is an enlarged schematic diagram of the local structure of point C in Figure 2. In some embodiments, the water outlet channel 2173 is connected to the nozzle 4 through the water outlet pipe 9.

[0117] To prevent impurities such as particulate matter from entering the spherical rotor pump 2, a filter can be installed in at least one of the water inlet channel 2172 and the water draw pipe 8. This can prevent particulate matter from entering the spherical rotor pump 2 to a certain extent, thereby preventing wear and blocking of the spherical rotor pump 2. This ensures that the water flowing into the spherical rotor pump 2 is relatively pure, reducing noise generated by the water flow and preventing the service life of the spherical rotor pump 2 from being affected by impure water.

[0118] Please continue to refer to Figures 5 and 15. Figure 15 is a schematic diagram of the structure of the slow-release device in the water irrigator provided in the embodiment of the present application. As shown in Figures 5 and 15, the water irrigator 10 provided in this embodiment also includes a slow-release device 20. The slow-release device 20 is located in the water storage chamber 5. The slow-release device 20 is configured to release functional substances into the water in the water storage chamber 5. The functional substances can be substances such as fresheners, probiotics, surfactants, fluoride, strontium chloride, etc. The functional substances can be mixed with the water to form a functional liquid with functions such as fresh breath and sterilization. Specifically, before using the water in the water storage chamber 5 to rinse the teeth in the oral cavity, the functional substances can be released into the water in the water storage chamber 5 through the slow-release device 20 to form a functional liquid. Even if the water ejected from the water irrigator 10 impacts the sensitive area of ​​the oral cavity and causes gum bleeding, at this time, because the functional liquid has functions such as fresh breath and sterilization, it can effectively prevent harmful components in the water from causing secondary damage to the bleeding area.

[0119] Specifically, as shown in FIG15 , the slow-release device 20 includes a protective shell 201, a slow-release member 202, and a filter 203. The protective shell 201 has a protective cavity 2012, and a liquid-through hole 2011 is provided on the outer surface of the protective shell 201, which is connected to the protective cavity 2012. The slow-release member 202 is located in the protective cavity 2012 and is configured to release the functional substance. The filter 203 is located between the slow-release member 202 and the inner wall of the protective cavity 2012. It can be understood that the protective shell 201 is configured to protect and fix the slow-release member 202. The protective cavity 2012 is connected to the water storage cavity 5 through the liquid-through hole 2011, so that water in the water storage cavity 5 can enter the protective cavity 2012 and mix with the functional substance released by the slow-release member 202. The filter 203 can filter the functional substance released by the slow-release member 202 to prevent the functional substance from agglomerating or large particles from precipitating and entering the inner cavity 213 of the spherical rotor pump 2.

[0120] The diameter of the liquid hole 2011 can be larger than the diameter of the filter pores of the filter element 203. This allows the liquid hole 2011 to be larger, ensuring that the water in the water storage chamber 5 can smoothly pass through the liquid hole 2011 into the protective chamber 2012. This also prevents the functional substance from agglomerating at the liquid hole 2011 and causing blockage of the liquid hole 2011. The diameter of the liquid hole 2011 can be selected based on actual needs and is not specifically limited in this application.

[0121] Furthermore, the pores of the filter element 203 have a smaller diameter than the pores of the filter screen, so that the pores of the filter element 203 are smaller, preventing large particles of functional substance from precipitating out of the pump housing 21 and entering the inner cavity 213. At the same time, the pores of the filter screen are larger, ensuring that the functional liquid formed by the mixture of the functional substance and the water can smoothly enter the inner cavity 213. The pore diameters of the pores of the filter screen and the pore diameters of the filter element 203 can be selected according to actual needs and are not specifically limited in this application.

[0122] To ensure that the water ejected from the nozzle 4 has a strong continuity, in some embodiments, the pump housing 21, the driving rotor 22, and the driven rotor 23 enclose a plurality of variable capacity cavities 24 spaced apart along the circumference of the driving rotor 22. In this way, the water ejected from the nozzle 4 can be ensured to have a strong continuity during the rotation of the driving rotor 22, thereby improving the performance of the oral irrigator 10 provided in this embodiment.

[0123] It should be noted that the water irrigator 10 provided in this embodiment is a handheld water irrigator or a desktop water irrigator. Among them, the water irrigator 10 can be a handheld water irrigator. Since the water storage chamber 5 of the handheld water irrigator is directly arranged together with the gripping portion of the body 1, it is easy to carry and the wide range of use of the water irrigator 10 is improved. Alternatively, the water irrigator 10 can also be a desktop water irrigator. Compared with the handheld water irrigator, the water storage chamber 5 of the desktop water irrigator is separately arranged from the gripping portion of the body 1. When adjusting the gripping posture, the water storage chamber 5 will not follow the tilt, and the volume of the gripping portion is relatively small, which is convenient for holding and adjusting the water irrigating posture. The specific selection can be made by those skilled in the art according to their needs.

[0124] Furthermore, the plurality of variable capacity chambers 24 are evenly arranged along the circumference of the active rotor 22. In this way, the continuity of the water spraying of the nozzle 4 can be further improved, and the performance of the oral irrigator 10 provided in the embodiment can be improved.

[0125] The water flosser provided in this embodiment includes a nozzle, a shell and a movement, a accommodating chamber and a water storage chamber are formed in the shell, the movement includes a spherical rotor pump arranged in the accommodating chamber, and the nozzle is connected to the movement; the spherical rotor pump includes a pump shell, an active rotor and a driven rotor, a water inlet and a water outlet are formed on the pump shell, the active rotor and the driven rotor are both arranged in the inner cavity of the pump shell and rotatably connected to the pump shell, the pump shell, the active rotor and the driven rotor are enclosed to form a variable capacity chamber, in the process of the active rotor driving the driven rotor to rotate together, the position of the variable capacity chamber changes in the circumferential direction, and the volume of the variable capacity chamber changes periodically, the volume of the variable capacity chamber increases when it is connected to the water inlet, and the volume of the variable capacity chamber decreases when it is connected to the water outlet; wherein, during the operation of the active rotor, the water inlet is always connected to the water storage chamber, and the water outlet is always connected to the nozzle. In this way, through the joint rotation of the active rotor and the driven rotor, the communication between the variable chamber and the water inlet, as well as the communication between the variable chamber and the water outlet can be achieved, and the water inlet is always connected to the water storage chamber, and the water outlet is always connected to the nozzle. Compared with the prior art in which the connection and disconnection between the water inlet and the water storage chamber, as well as the connection and disconnection between the water outlet and the nozzle are controlled by opening or closing a one-way valve, the water flosser provided in this embodiment does not have the sound of the one-way valve opening or closing during use, so that the water flosser provided in this embodiment has less noise during use; in addition, since there is no one-way valve, there will be no problem of failure caused by deformation of the one-way valve affecting the service life of the water flosser; in addition, without the one-way valve, the number of parts used can be reduced, and the assembly efficiency of the water flosser can be improved; and without the one-way valve, the use of the water flosser will not be affected by the use of the one-way valve.

[0126] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A dental flosser, wherein: include: nozzle; A housing, wherein a receiving cavity and a water storage cavity are formed in the housing; as well as A movement, wherein the movement comprises a spherical rotor pump arranged in the accommodating cavity, and the nozzle is connected to the movement; the spherical rotor pump comprises a pump housing, an active rotor and a driven rotor, a water inlet and a water outlet are formed on the pump housing, the active rotor and the driven rotor are both arranged in the inner cavity of the pump housing and are rotatably connected to the pump housing, the pump housing, the active rotor and the driven rotor enclose a variable capacity cavity, and in the process that the active rotor drives the driven rotor to rotate together, the position of the variable capacity cavity changes in the circumferential direction, and the volume of the variable capacity cavity changes periodically, the volume of the variable capacity cavity increases when it is connected to the water inlet, and the volume of the variable capacity cavity decreases when it is connected to the water outlet; Wherein, during the operation of the active rotor, the water inlet is always connected to the water storage chamber, and the water outlet is always connected to the nozzle.

2. The oral irrigator according to claim 1, wherein: The pump housing comprises a pump housing body and two rotating parts connected to the pump housing body, and the two rotating parts are arranged opposite to each other; The active rotor comprises a first rotor body and a first rotor shaft connected together, the first rotor body is rotationally matched with the pump housing body, and the first rotor shaft is rotationally matched with one of the two rotating parts; The driven rotor comprises a second rotor body and a second rotor shaft connected together, the second rotor body is movably connected to the first rotor body, the second rotor body is rotationally matched with the pump housing body, and the second rotor shaft is rotationally matched with the other of the two rotating parts; There is an included angle between the axial direction of the first rotor shaft and the axial direction of the second rotor shaft.

3. The oral irrigator according to claim 1, wherein: In the extension direction of the housing, the distance between the spherical rotor pump and the top end of the housing is greater than the distance between the spherical rotor pump and the bottom end of the housing, and the top end is located above the bottom end in the gravity direction.

4. The oral rinser according to claim 1, wherein: The accommodating chamber and the water storage chamber are separated by a first partition, and a water suction pipe is provided on the first partition. The water suction pipe extends into the water storage chamber, and the water suction pipe is connected to the spherical rotor pump. The distance between the free end of the water suction pipe and the bottom of the water storage chamber is between 0.5mm and 5mm.

5. The oral rinser according to claim 4, wherein: The distance between the bottom of the first partition and the bottom of the water storage chamber is less than or equal to 30 mm.

6. The oral rinser according to claim 4, wherein: The axis of the water-drawing pipe is parallel to the height direction of the water flosser.

7. The oral irrigator according to claim 1, wherein: Along the circumference of the oral irrigator, the spherical rotor pump is spaced apart from the inner wall of the accommodating chamber.

8. The oral rinser according to claim 1, wherein: The water outlet is located above the pump housing; or, the water outlet is extended along the horizontal direction of the pump housing.

9. The oral rinser according to claim 2, wherein: The rotating part has a through hole matched with the first rotor shaft; The spherical rotor pump further comprises a motor, which is disposed in the accommodating cavity, and a driving shaft of the motor is directly connected to the first rotor shaft; The motor is used to drive the active rotor to drive the driven rotor to rotate together.

10. The oral rinser according to claim 9, wherein: In the direction from the through hole to the motor, the drive shaft located outside the spherical rotor pump is not lower than the through hole at any position.

11. The oral rinser according to claim 9, wherein: The spherical rotor pump and the motor are arranged in an inclined manner in the accommodating cavity.

12. The oral rinser according to claim 9, wherein: The electrical connection line of the motor is located at a side of the motor away from the through hole.

13. The oral rinser according to claim 9, wherein: The through hole is located below the motor.

14. The oral rinser according to claim 9, wherein: The movement also includes a water baffle plate, which is connected to the driving shaft and is located on a side of the through hole facing the motor.

15. The oral rinser according to claim 2, wherein: The first rotor body includes an inner support portion and an outer covering portion covering an outer circumference of the inner support portion, the inner support portion is connected to the first rotor shaft, and the inner support portion is made of metal.

16. The oral irrigator according to claim 15, wherein: The first rotor shaft and the inner support portion are an integral structure, and / or the outer covering portion is made of plastic material.

17. The oral irrigator according to claim 15, wherein: A distance between a center of the inner support portion and an outer periphery of the inner support portion is greater than a distance from an inner periphery to an outer periphery of the outer covering portion.

18. The oral rinser according to claim 17, wherein: The distance from the inner periphery to the outer periphery of the outer covering portion is greater than 1.5 mm.

19. The oral rinser according to claim 2, wherein: The first rotor body and the second rotor body form a spherical rotor; The active rotor further comprises a pin shaft portion, wherein the pin shaft portion and the first rotor shaft are connected to opposite ends of the first rotor body; the second rotor body comprises a matching cavity for rotationally matching with the pin shaft portion; The pin end surfaces at both ends of the pin portion each include a first plane, and a plane where the first plane is located intersects with the axial direction of the pin portion.

20. The oral rinser according to claim 19, wherein: The first plane is circular in shape.

21. The oral rinser according to claim 20, wherein: The diameter of the first plane is R1, the diameter of the pin shaft is R2, Alternatively, the diameter of the pin shaft is R2, the diameter of the ball of the spherical rotor is R3, Alternatively, the length of the pin shaft is L, the ball diameter of the spherical rotor is R3, Alternatively, the ball diameter of the spherical rotator is R3, 10 mm≤R3≤18 mm, or the ball diameter of the spherical rotator is greater than 6 mm.

22. The oral rinser according to claim 19, wherein: There is a gap between the spherical rotator and the inner wall surface of the inner cavity, and the distance between the spherical rotator and the inner wall surface of the inner cavity is greater than or equal to 0.01 mm and less than or equal to 0.03 mm.

23. The oral rinser according to claim 19, wherein: The diameter of the pin shaft portion is greater than 2 mm.

24. The oral irrigator according to claim 1, wherein: The active rotor is a plastic rotor or a metal rotor; and / or, The driven rotor is a plastic rotor or a metal rotor.

25. The oral irrigator according to claim 2, wherein: The pump housing comprises a first shell and a second shell arranged opposite to each other, the first shell and the second shell enclose the inner cavity, the first rotor shaft is rotatably matched with the first shell, the second rotor shaft is rotatably matched with the second shell, and the water inlet and the water outlet are both located in the second shell; The first shell has a first boss at one end close to the second shell, and the second shell has a second boss at one end close to the first shell. The first boss and the second boss are abutted together to form a boss structure. A locking piece is provided on the outside of the boss structure, and the locking piece is configured to lock the first boss and the second boss together.

26. The oral rinser according to claim 25, wherein: The locking member is an elastic member, and the elastic member is sleeved on the outside of the boss structure.

27. The oral rinser according to claim 25, wherein: The first boss has a first connection hole, and the second boss has a second connection hole opposite to the first connection hole; the first boss and the second boss are connected together by a fastener penetrating the first connection hole and the second connection hole.

28. The oral irrigator according to claim 25, wherein: A sealing member is disposed between the first shell and the second shell, and a groove for embedding the sealing member is disposed on at least one of the first shell and the second shell.

29. The oral irrigator according to claim 2, wherein: The active rotor further comprises a pin shaft portion, and the second rotor body comprises a matching cavity for rotationally matching with the pin shaft portion; The first rotor body comprises first mating surfaces located at both sides of the pin shaft portion, a side surface of the second rotor body facing the first rotor body is a second mating surface, the mating cavity is located at the second mating surface and extends along the axial direction of the pin shaft portion to penetrate both sides of the second rotor body; Among them, the second mating surface is located on both sides of the mating cavity, and extends obliquely in a direction away from the mating cavity and away from the first rotor body. When the driven rotor rotates until the second mating surface is opposite to the water inlet or the water outlet, the second mating surface is located on the side of the water inlet and the water outlet close to the first shell, so that the water inlet and the water outlet are connected to the variable cavity.

30. The oral irrigator according to claim 29, wherein: When the volume of the variable-capacity cavity is minimum, the first mating surface and the second mating surface are arranged at an angle.

31. The oral irrigator according to claim 29, wherein: When the volume of the variable capacity cavity is minimum, the first matching surface and the second matching surface are parallel to each other.

32. The oral irrigator according to claim 29, wherein: When the volume of the variable cavity is the smallest, the maximum distance between the first matching surface and the second matching surface is D, and 0.5 mm≤D≤2 mm.

33. The oral irrigator according to claim 1, wherein: The thermal expansion coefficient of the active rotor is smaller than the thermal expansion coefficient of the pump housing, and / or the thermal expansion coefficient of the driven rotor is smaller than the thermal expansion coefficient of the pump housing.

34. The oral irrigator according to claim 1, wherein: The active rotor further comprises a pin shaft portion, and the second rotor body comprises a matching cavity for rotationally matching with the pin shaft portion; the pump housing comprises a first shell and a second shell arranged opposite to each other, and the first shell and the second shell are enclosed to form the inner cavity; A gap between an outer periphery of the first rotor body close to the pin shaft and an inner wall surface of the first housing is smaller than a gap between an outer periphery of the first rotor body away from the pin shaft and an inner wall surface of the first housing.

35. The oral irrigator according to claim 1, wherein: A first buffer is provided between the pump housing and the inner wall of the accommodating chamber; and / or, A material of at least one of the driving rotor, the driven rotor, and the pump housing includes carbon fiber.

36. The oral irrigator according to claim 2, wherein: The rotating part has a through hole matched with the first rotor shaft; The spherical rotor pump further includes a motor, a mounting bracket is provided in the accommodating chamber, the motor is mounted on the mounting bracket, the driving shaft of the motor is connected to the first rotor shaft, and the motor is used to drive the active rotor to drive the driven rotor to rotate together; A second buffer is provided between the motor and the mounting bracket.

37. The oral irrigator according to claim 36, wherein: One end of the pump housing facing away from the motor abuts against the inner wall of the accommodating cavity.

38. The oral irrigator according to claim 1, wherein: A water inlet channel and a water outlet channel are formed on the pump housing, the water inlet channel is communicated with the water storage chamber, the water outlet channel is communicated with the nozzle, the water inlet is formed at the water outlet end of the water inlet channel, and the water outlet is formed at the water inlet end of the water outlet channel; The water inlet end of the water inlet channel faces the bottom of the water storage chamber in the gravity direction; and / or, The water outlet end of the water outlet channel faces the nozzle.

39. The oral irrigator according to claim 38, wherein: The axis of the water inlet channel is a straight line; and / or, The axis of the water outlet channel is a straight line.

40. The oral rinser according to claim 38, wherein: The water inlet channel is connected to the water storage chamber through a water pumping pipe, and a filter net is arranged in at least one of the water inlet channel and the water pumping pipe.

41. The oral irrigator according to claim 1, wherein: It also includes a slow-release device arranged in the water storage cavity, and the slow-release device is used to release functional substances into the water in the water storage cavity.

42. The oral rinser according to claim 41, wherein: The slow-release device comprises a protective shell, a slow-release element and a filter element; The protective shell has a liquid-through hole and a protective cavity that are interconnected, the slow-release component is located in the protective cavity, and the slow-release component is used to release the functional substance, and the filter is located between the slow-release component and the inner wall of the protective cavity; Wherein, the aperture of the liquid-passing hole is larger than the aperture of the filter hole of the filter element.

43. The oral irrigator according to claim 42, wherein: The pump housing is provided with a water inlet channel, the water inlet channel is connected to the water storage chamber, the water inlet channel and the water storage chamber are connected via a water pumping pipe, and at least one of the water inlet channel and the water pumping pipe is provided with a filter screen; The pore size of the filter holes of the filter element is smaller than the pore size of the filter holes of the filter net.

44. The oral irrigator according to claim 1, wherein: The pump housing, the driving rotor and the driven rotor enclose a plurality of variable capacity cavities which are arranged at intervals along the circumference of the driving rotor.

45. The oral irrigator according to claim 1, wherein: The housing comprises a body and a water tank connected together, the accommodating cavity is formed in the body, and the water storage cavity is formed by enclosing the body and the water tank; The spherical rotor pump is arranged close to the water tank.

46. ​​The oral irrigator according to claim 1, wherein: The spherical rotor pump further comprises a motor, which is disposed in the accommodating cavity, and a driving shaft of the motor is connected to the active rotor; The spherical rotor pump and the motor are arranged along the horizontal direction of the fuselage; or, the spherical rotor pump and the motor are arranged along the vertical direction of the fuselage.

47. The oral irrigator according to claim 46, wherein: The water tank is slidably connected to the body to change the volume of the water storage chamber.

48. The oral rinser according to claim 47, wherein: A water suction pipe is provided under the fuselage, the length of the water suction pipe is L1, the water suction pipe is connected to the spherical rotor pump, and the water tank is slidably connected relative to the fuselage between a first position and a second position; At the first position, the volume of the water storage chamber is the largest, and the clearance between the bottom wall of the water storage chamber and the bottom end of the fuselage is L2, L2-L1 ≤5cm.

49. The oral irrigator according to claim 47, wherein: The fuselage is provided with a water suction pipe, which extends into the water storage cavity. The water suction pipe is connected to the spherical rotor pump, and the length of the water suction pipe is L3. The spherical rotor pump and the fuselage are connected by a connecting pipe, and the length of the connecting pipe is L4, L3+L4≤15cm.

50. The oral irrigator according to claim 1, wherein: The spherical rotor pump further comprises a motor, which is disposed in the accommodating cavity, and a driving shaft of the motor is connected to the active rotor; The driven rotor comprises a second rotor body and a second rotor shaft connected together, the second rotor body is movably connected to the first rotor body, and the second rotor body is rotationally matched with the pump housing body; The length extension direction of the drive shaft is the same as the length extension direction of the fuselage, and the length extension direction of the second rotor shaft is arranged at an angle to the length extension direction of the drive shaft; Along the axial projection of the drive shaft, the outer contour of the pump housing is located within the outer contour of the motor.

51. The oral irrigator according to claim 50, wherein: The length extension direction of the second rotor shaft is the same as the length extension direction of the fuselage, and the length extension direction of the drive shaft is arranged at an angle to the length extension direction of the driven rotor; Along the axial projection of the second rotor shaft, the outer contour of the motor is located within the outer contour of the pump housing.

52. The oral irrigator according to claim 1, wherein: The active rotor comprises a first rotor body and a first rotor shaft connected together, and the pump housing has a through hole for rotationally cooperating with the first rotor shaft; the spherical rotor pump further comprises a motor, the motor is arranged in the accommodating cavity, and the driving shaft of the motor is directly connected to the first rotor shaft; The oral irrigator further comprises a second partition plate, which is connected to the body to separate the accommodating cavity into a first chamber and a second chamber; The second partition plate is provided with a through hole connecting the first chamber and the second chamber, the motor is located in the first chamber, the spherical rotor pump is located in the second chamber, and the drive shaft passes through the through hole to penetrate the through hole and is connected to the spherical rotor pump.

53. The oral irrigator according to claim 1, wherein: The water flosser is a handheld water flosser or a desktop water flosser.

Images