CN220193217U

CN220193217U - Tooth-flushing device

Info

Publication number: CN220193217U
Application number: CN202321558126.1U
Authority: CN
Inventors: 吴碧涛
Original assignee: Guangzhou Stars Pulse Co Ltd
Current assignee: Guangzhou Stars Pulse Co Ltd
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2023-12-19
Anticipated expiration: 2033-06-16

Abstract

The application provides a tooth-flushing device, which comprises a nozzle, a shell and a core, wherein the core comprises a spherical rotor pump arranged in a containing cavity; the spherical rotor pump comprises a pump shell, a driving rotor and a driven rotor, wherein the pump shell, the driving rotor and the driven rotor are enclosed to form a spaced volume-changing cavity, the position of the volume-changing cavity is changed in the circumferential direction in the process that the driving rotor drives the driven rotor to rotate together, the volume of the volume-changing cavity is increased when the volume-changing cavity is communicated with a water inlet, and the volume of the volume-changing cavity is reduced when the volume-changing cavity is communicated with a water outlet; wherein, in the operation process of the active rotor, the water inlet is always communicated with the water storage cavity, and the water outlet is always communicated with the nozzle. The tooth flusher of this application is less in the noise of use.

Description

Tooth-flushing device

Technical Field

The application relates to the technical field of oral cavity cleaning, in particular to a tooth washing device.

Background

The tooth cleaning device is a tool for cleaning teeth and tooth gaps by using a pulse water flow impact mode.

Generally, the tooth-flushing device is provided with a machine body, a water tank and a nozzle, wherein the water tank and the nozzle are arranged at two opposite ends of the machine body, a plunger pump is arranged in the machine body, the plunger pump is provided with a water inlet communicated with the water tank and a water outlet communicated with the nozzle, one-way valves are arranged at the water inlet and the water outlet for controlling water flow at the water inlet and the water outlet, water in the water tank is pumped into the nozzle through the plunger pump by opening or closing the one-way valves at the water inlet and the water outlet, and water is sprayed into an oral cavity through the nozzle to clean the oral cavity.

However, in the above-mentioned dental irrigator, the one-way valve generates noise in the course of opening or closing the waterway, thus making the dental irrigator noisier when in operation; in addition, the check valve can be permanently deformed in the long-term opening and closing process, and the service life of the tooth washer can be influenced by failure of the check valve.

Disclosure of Invention

The application provides a tooth-flushing device, can solve the tooth-flushing device in the correlation technique in the in-process that uses, the check valve can produce noise and the check valve can take place permanent deformation at opening or the in-process that closes for the check valve inefficacy influences tooth-flushing device life's problem. The specific technical scheme is as follows:

the application provides a tooth flushing device, which comprises a nozzle, a shell and a machine core, wherein a containing cavity and a water storage cavity are formed in the shell; the spherical rotor pump comprises a pump shell, a driving rotor and a driven rotor, wherein a water inlet and a water outlet are formed in the pump shell, the driving rotor and the driven rotor are both arranged in an inner cavity of the pump shell and are rotationally connected with the pump shell, a volume-variable cavity is formed by encircling the pump shell, the driving rotor and the driven rotor, the position of the volume-variable cavity is changed in the circumferential direction in the process that the driving rotor drives the driven rotor to rotate together, the volume of the volume-variable cavity is periodically changed, the volume of the volume-variable cavity is increased when the volume-variable cavity is communicated with the water inlet, and the volume of the volume-variable cavity is reduced when the volume-variable cavity is communicated with the water outlet; wherein, in the operation process of the active rotor, the water inlet is always communicated with the water storage cavity, and the water outlet is always communicated with the nozzle.

In some alternative embodiments, the pump casing includes a pump casing body and two rotating parts connected to the pump casing body, the two rotating parts being disposed opposite to each other; the driving rotor comprises a first rotor body and a first rotor shaft which are connected together, the first rotor body is in rotary fit with the pump shell body, and the first rotor shaft is in rotary fit with one of the two rotary parts; the driven rotor comprises a second rotor body and a second rotor shaft which are connected together, the second rotor body is movably connected with the first rotor body, the second rotor body is in rotary fit with the pump shell body, and the second rotor shaft is in rotary fit with the other one of the two rotary parts; wherein, there is the contained angle between the axial of first rotor shaft and the axial of second rotor shaft.

In some alternative embodiments, the spherical rotor pump is located at a greater distance from the top end of the housing than the bottom end of the housing in the direction of extension of the housing, the top end being located at an upper portion of the bottom end in the direction of gravity.

In some alternative embodiments, the accommodating cavity and the water storage cavity are separated by a first partition board, a water drawing pipe is arranged on the first partition board, the water drawing pipe stretches into the water storage cavity, the water drawing pipe is communicated with the spherical rotor pump, and the distance between the free end of the water drawing pipe and the bottom of the water storage cavity is between 0.5mm and 5 mm.

In some alternative embodiments, the distance between the bottom of the first partition and the bottom of the water storage chamber is less than or equal to 30mm.

In some alternative embodiments, the axis of the dip tube is parallel to the height of the dental impactor.

In some alternative embodiments, the spherical rotor pump is spaced from the inner wall of the receiving cavity along the circumference of the tooth irrigator.

In some alternative embodiments, the water outlet is located above the pump housing; or the water outlet extends along the horizontal direction of the pump shell.

In some alternative embodiments, a through hole is formed on a rotating part, and the through hole is matched with the first rotor shaft; the spherical rotor pump further comprises a motor, the motor is arranged in the accommodating cavity, and a driving shaft of the motor is directly connected with the first rotor shaft; the motor is used for driving the driving rotor to drive the driven rotor to rotate together. Thus, for example, a gear transmission structure, a cam connecting rod structure and other transmission mechanisms can be omitted, and noise can be reduced by directly driving the driving rotor to rotate through the motor due to the fact that the transmission mechanism generates noise during operation.

In some alternative embodiments, the drive shaft located outside the ball rotor pump is not lower than the through hole at any position in the direction of the through hole to the motor.

In some alternative embodiments, the ball rotor pump and motor are disposed in an inclined arrangement within the receiving chamber.

In some alternative embodiments, the drive shaft and the first rotor shaft are cooperatively secured by a pin connection.

In some alternative embodiments, the electrical connection line of the motor is located on the side of the motor facing away from the through hole.

In some alternative embodiments, the through hole is located below the motor.

In some alternative embodiments, the movement further comprises a water deflector connected to the drive shaft and located on a side of the through hole facing the motor.

In some alternative embodiments, the first rotor body includes an inner support portion and an outer cover portion covering an outer periphery of the inner support portion, the inner support portion is connected with the first rotor shaft, and the inner support portion is made of a metal material.

In some alternative embodiments, the first rotor shaft is of unitary construction with the inner support.

In some alternative embodiments, the outer cover is made of a plastic material.

In some alternative embodiments, the distance between the center of the inner support portion and the outer periphery of the inner support portion is greater than the inner periphery to outer periphery distance of the outer cover portion.

In some alternative embodiments, the distance from the inner periphery to the outer periphery of the outer cover is greater than 1.5mm.

In some alternative embodiments, the first rotor body and the second rotor body form a spherical swivel; the driving rotor further comprises a pin shaft part, wherein the pin shaft part and the first rotor shaft are connected to the opposite ends of the first rotor body; the second rotor body is provided with a matching cavity which is in rotary fit with the pin shaft part; the pin shaft end surfaces at the two ends of the pin shaft part respectively comprise a first plane, and the planes where the first planes are located are intersected with the axial direction of the pin shaft part. Therefore, the protruding degree of the end face of the pin shaft can be reduced, when the driving rotor is formed by adopting single-side demolding mold processing, the mold is not easy to form a back-off at the end face of the pin shaft part, so that demolding is more convenient, the driving rotor can be formed in a mode of normally using the single-side demolding mold processing, the driving rotor is not required to be formed by adopting double-side demolding mold processing, the spherical accuracy of the driving rotor can be ensured, the driving rotor is not easy to be blocked when rotating, meanwhile, the secondary processing treatment is not required to be carried out on a joint mold line, the production yield of the driving rotor can be improved, and the production cost of the spherical rotor pump is reduced.

In some alternative embodiments, the first plane is circular in shape. The first plane can be prevented from having an angular structure, and the normal rotation of the driving rotor and the driven rotor is prevented from being influenced by the friction between the angular structure and the inner wall surface of the inner cavity in the rotation process of the driving rotor and the driven rotor.

In some alternative embodiments, the first plane has a diameter R1, the pin shaft portion has a diameter R2,so as to ensure that the area of the first plane is large enough to facilitate demoulding.

In some alternative embodiments, R1 is equal to R2. The possibility that the mold forms the back-off at the pin shaft end face of the pin shaft part when the driving rotor is formed by adopting the single-side demolding mold for processing can be reduced to the greatest extent.

In some alternative embodiments, the pin shaft portion has a diameter R2, the ball of the ball swivel has a ball diameter R3, the pin shaft portion is ensured to have sufficient structural strength, and the volume of the volume-variable cavity is prevented from being excessively small.

In some alternative embodiments, the pin shaft portion has a length L, the ball of the ball swivel has a ball diameter R3,the pin shaft portion is ensured to have sufficient structural strength, and the volume of the volume-variable cavity is prevented from being excessively small.

In some alternative embodiments, the ball diameter of the ball rotator is R3, 10 millimeters R3 18 millimeters. The liquid pumping efficiency of the spherical rotor pump is improved, and the space utilization rate of the tooth flusher can be improved.

In some alternative embodiments, the ball diameter of the ball swivel is greater than 6 millimeters.

In some alternative embodiments, there is a gap between the ball rotator and the inner wall surface of the inner cavity, and the distance between the ball rotator and the inner wall surface of the inner cavity is 0.01 mm or more and 0.03 mm or less. The particle impurities are prevented from being blocked between the driving rotor or the driven rotor and the inner wall surface of the inner cavity, so that the driving rotor or the driven rotor is prevented from being blocked, and meanwhile, the condition that the capacity-changing cavity is easy to leak water and the liquid pumping efficiency of the spherical rotor pump is prevented from being influenced.

In some alternative embodiments, the pin shaft portion has a diameter greater than 2mm.

In some alternative embodiments, the inner support portion extends at least partially into the pin shaft portion.

In some alternative embodiments, the edge of the pin end surface abuts against the inner wall surface of the inner cavity. So that the variable-volume cavity is not easy to leak water in the rotation process of the driving rotor and the driven rotor.

In some alternative embodiments, the driving rotor and/or the driven rotor is a plastic rotor. In this way, the weight of the driving rotor can be reduced, and thus the weight of the spherical rotor pump can be reduced.

In some alternative embodiments, the driving rotor and/or the driven rotor are made of a metallic material.

In some alternative embodiments, the pump casing comprises a first casing and a second casing which are oppositely arranged, the first casing and the second casing are enclosed to form an inner cavity, the first rotor shaft is in rotary fit with the first casing, the second rotor shaft is in rotary fit with the second casing, and the water inlet and the water outlet are both positioned in the second casing; one end of the first shell, which is close to the second shell, is provided with a first boss, one end of the second shell, which is close to the first shell, is provided with a second boss, the first boss and the second boss are abutted together to form a boss structure, and a locking piece is arranged on the outer side of the boss structure and used for locking the first boss and the second boss together. In this way, force can be applied to the first shell and the second shell, so that the first shell and the second shell are prevented from being offset to a certain extent, and noise can be reduced; in addition, can also promote the sealing performance between first casing and the second casing, can avoid leaking to a certain extent.

In some alternative embodiments, the locking member is an elastic member, and the elastic member is sleeved outside the boss structure.

In some alternative embodiments, the first boss has a first connection hole thereon, and the second boss has a second connection hole thereon opposite to the first connection hole; the first boss and the second boss are connected together through a fastener penetrating through the first connecting hole and the second connecting hole.

In some alternative embodiments, a seal is provided between the first housing and the second housing; at least one of the first shell and the second shell is provided with a groove for embedding the sealing element. Therefore, when the spherical rotor pump is assembled, the sealing performance between the first shell and the second shell can be further improved through the fixed connection compression between the first shell and the second shell and the sealing effect of the sealing element.

In some alternative embodiments, the first rotor body includes first mating surfaces located at both sides of the pin shaft portion, the side of the second rotor body facing the first rotor body is a second mating surface, and the mating cavity is located at the second mating surface and extends in an axial direction of the pin shaft portion to penetrate both sides of the second rotor body; the second matching surface is positioned at the parts of the two sides of the matching cavity, extends obliquely along the direction away from the matching cavity and away from the first rotor body, and is positioned at one side of the water inlet and the water outlet, which is close to the first shell, when the driven rotor rotates to the position that the second matching surface is opposite to the water inlet or the water outlet, so that the water inlet and the water outlet are communicated with the capacity-variable cavity. The volume of the volume-variable cavity can be increased, so that the pumping efficiency of the spherical rotor pump can be improved.

In some alternative embodiments, the first mating surface is disposed at an angle to the second mating surface when the volume of the variable volume chamber is at a minimum. The probability of adhesion between the first matching surface and the corresponding second matching surface can be reduced, and the influence on the liquid pumping efficiency of the spherical rotor pump is small on the basis that a space is ensured to avoid particle impurities.

In some alternative embodiments, the first mating surface and the second mating surface are parallel to each other when the volume of the variable volume chamber is at a minimum. The probability of adhesion between the first matching surface and the corresponding second matching surface can be further reduced, and therefore the reliability of the spherical rotor pump can be further improved.

In some alternative embodiments, when the volume of the variable volume chamber is the smallest, the maximum distance between the first mating surface and the second mating surface is d, and d is 0.5 mm.ltoreq.d.ltoreq.2 mm.

In some alternative embodiments, the coefficient of thermal expansion of the driving rotor is less than the coefficient of thermal expansion of the first housing, and/or the coefficient of thermal expansion of the driven rotor is less than the coefficient of thermal expansion of the second housing.

In some alternative embodiments, the clearance between the outer periphery of the side of the first rotor body close to the pin shaft portion and the inner wall surface of the first housing is smaller than the clearance between the outer periphery of the side of the first rotor body remote from the pin shaft portion and the inner wall surface of the first housing.

In some alternative embodiments, a first bumper is provided between the pump housing and the inner wall of the receiving cavity. Therefore, vibration generated by the spherical rotor pump can be relieved through the arrangement of the first buffer piece, and noise is reduced.

In some alternative embodiments, the material of at least one of the driving rotor, the driven rotor, and the pump housing comprises carbon fibers. Therefore, the lubricating capability of the driving rotor and/or the driven rotor and/or the pump shell can be improved, so that the driving rotor and the driven rotor rotate more smoothly relative to the pump shell, and noise generated in the rotation process of the driving rotor and the driven rotor is reduced.

In some alternative embodiments, a through hole is formed on a rotating part, and the through hole is matched with the first rotor shaft; the spherical rotor pump further comprises a motor, a mounting bracket is arranged in the accommodating cavity, the motor is mounted on the mounting bracket, a driving shaft of the motor is connected with the first rotor shaft, and the motor is used for driving the driving rotor to drive the driven rotor to rotate together; a second buffer piece is arranged between the motor and the mounting bracket. Thus, the vibration of the motor can be relieved through the arrangement of the second buffer piece, so that noise is further reduced.

In some alternative embodiments, the end of the pump housing facing away from the motor abuts against the inner wall of the receiving chamber. Therefore, the suspension arrangement of the spherical rotor pump can be avoided, and the generation of large noise of the spherical rotor pump due to large amplitude can be avoided.

In some alternative embodiments, a water inlet channel and a water outlet channel are formed on the pump shell, the water inlet channel is communicated with the water storage cavity, 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 water storage cavity; and/or the water outlet end of the water outlet channel faces the nozzle. Therefore, the number of times of diversion of water flow in the water inlet channel and the water outlet channel can be reduced, so that noise generated in the flowing process of the water flow is reduced.

In some alternative embodiments, the axis of the water inlet channel is a straight line; and/or the axis of the water outlet channel is a straight line. Therefore, the flow direction of the water flow in the water inlet channel and the water outlet channel is relatively fixed, the turning times of the water flow in the water inlet channel and the water outlet channel can be further reduced, and the noise generated in the flowing process of the water flow is reduced.

In some alternative embodiments, the water inlet channel is communicated with the water storage cavity through a water drawing pipe, and a filter screen is arranged in at least one of the water inlet channel and the water drawing pipe. Like this, then can avoid particulate matter to get into in the spherical rotor pump to a certain extent, then can avoid causing the wearing and tearing and the jamming of spherical rotor pump for the rivers that flow into in the spherical rotor pump are comparatively pure, not only can reduce the noise that rivers produced in the flow process but also can avoid producing the influence to the life of spherical rotor pump owing to the impure of rivers.

In some alternative embodiments, the tooth irrigator provided herein further comprises a slow release device disposed in the water storage chamber, the slow release device being configured to release a functional substance to the water in the water storage chamber. The functional substance can be mixed with water to form a functional liquid with the functions of refreshing breath, sterilizing, disinfecting and the like.

In some alternative embodiments, the sustained release device comprises a protective shell, a sustained release member, and a filter member; the protective shell is provided with a liquid through hole and a protective cavity which are communicated with each other, the slow release piece is positioned in the protective cavity and used for releasing functional substances, and the filter piece is positioned between the slow release piece and the inner side wall surface of the protective cavity; wherein, the aperture of the liquid through hole is larger than the aperture of the filter hole of the filter element. The water in the water storage cavity can be ensured to smoothly enter the protection cavity through the liquid through hole, and meanwhile, functional substances can be prevented from being accumulated at the liquid through hole to cause the blocking of the liquid through hole.

In some alternative embodiments, the pore size of the pores of the filter is smaller than the pore size of the pores of the filter screen. Prevent that large granule's functional substance from separating out and entering in the inner chamber of sphere rotor pump, guarantee simultaneously that functional substance and water liquid mixture form the functional liquid can get into the inner chamber smoothly.

In some alternative embodiments, the pump housing, the driving rotor and the driven rotor enclose a plurality of variable-volume chambers arranged at intervals along the circumferential direction of the driving rotor.

In some alternative embodiments, the plurality of variable-volume chambers are uniformly disposed along the outer circumference of the active rotor.

In some alternative embodiments, the housing comprises a body and a water tank connected together, the receiving 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. Therefore, the waterway from the water storage cavity to the spherical rotor pump can be shortened, and the idle time of the tooth flushing device can be reduced in the starting process, so that the phenomenon that the spherical rotor pump is invalid due to the fact that the temperature of the spherical rotor pump rises too high caused by idle can be avoided.

In some alternative embodiments, the ball rotor pump and motor are arranged in a horizontal orientation along the fuselage.

In some alternative embodiments, the spherical rotor pump and the motor are arranged in a vertical direction of the body.

In some alternative embodiments, the length extension direction of the drive shaft is the same as the length extension direction of the fuselage, and the second rotor shaft length extension direction is disposed at an angle to the drive shaft length extension direction; the outer contour of the pump housing is located within the outer contour of the motor, projected in the axial direction of the drive shaft.

In some alternative embodiments, the length extension direction of the second rotor shaft is the same as the length extension direction of the machine body, and the length extension direction of the driving shaft and the length extension direction of the driven rotor are arranged at an included angle; 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.

In some alternative embodiments, the tooth irrigator provided herein further comprises a second partition coupled within the main body to divide the receiving cavity into a first chamber and a second chamber; the second baffle is offered the via hole of intercommunication first cavity and second cavity, and the motor is located first cavity, and spherical rotor pump is located the second cavity, and the drive shaft passes the via hole in order to wear to locate the through-hole and be connected with spherical rotor pump.

In some alternative embodiments, the water tank is slidably connected to the body to vary the volume of the water storage chamber.

In some alternative embodiments, a water drawing pipe is arranged below the machine body, the length of the water drawing pipe is L1, the water drawing pipe is communicated with the spherical rotor pump, and the water tank is slidably connected between a first position and a second position relative to the machine body;

the water storage cavity has the largest volume at the first position, and the clear distance between the bottom wall of the water storage cavity and the bottom end of the machine body is L2, wherein L2-L1 is less than or equal to 5cm.

In some alternative embodiments, the machine body is provided with a water drawing pipe, the water drawing pipe extends into the water storage cavity, the water drawing pipe is communicated with the spherical rotor pump, the length of the water drawing pipe is L3, the spherical rotor pump is connected with the machine body through a communicating pipe, and the length of the communicating pipe is L4, and L3+L4 is less than or equal to 15cm.

In some alternative embodiments, the dental irrigator is a hand-held dental irrigator or a bench-type dental irrigator.

The tooth flushing device comprises a nozzle, a shell and a machine core, wherein a containing cavity and a water storage cavity are formed in the shell, the machine core comprises a spherical rotor pump arranged in the containing cavity, and the nozzle is connected with the machine core; the spherical rotor pump comprises a pump shell, a driving rotor and a driven rotor, wherein a water inlet and a water outlet are formed in the pump shell, the driving rotor and the driven rotor are both arranged in an inner cavity of the pump shell and are rotationally connected with the pump shell, a volume-variable cavity is formed by encircling the pump shell, the driving rotor and the driven rotor, the position of the volume-variable cavity is changed in the circumferential direction in the process that the driving rotor drives the driven rotor to rotate together, the volume of the volume-variable cavity is periodically changed, the volume of the volume-variable cavity is increased when the volume-variable cavity is communicated with the water inlet, and the volume of the volume-variable cavity is reduced when the volume-variable cavity is communicated with the water outlet; wherein, in the operation process of the active rotor, the water inlet is always communicated with the water storage cavity, and the water outlet is always communicated with the nozzle. In this way, through the rotation of the driving rotor and the driven rotor together, the communication between the volume-variable cavity and the water inlet and the communication between the volume-variable cavity and the water outlet can be realized, the water inlet is always communicated with the water storage cavity, and the water outlet is always communicated with the nozzle. In addition, the problem that the service life of the tooth washer is influenced due to failure caused by deformation of the one-way valve can be avoided due to the fact that the one-way valve is not arranged; in addition, the number of parts can be reduced without the arrangement of the one-way valve, and the assembly efficiency of the tooth-flushing device is improved; furthermore, without the arrangement of the one-way valve, the use of the tooth irrigator is not affected by the use of the one-way valve.

Drawings

Fig. 1 is a schematic structural view of a tooth irrigator according to an embodiment of the present application;

fig. 2 is a schematic view of a partial structure of a tooth rinse according to an embodiment of the present application;

FIG. 3 is an exploded view of a spherical rotor pump in a dental irrigator provided in an embodiment of the present application;

FIG. 4 is a cross-sectional view of a spherical rotor pump in a dental irrigator provided by an embodiment of the present application;

FIG. 5 is an exploded view of a spherical rotor pump in a dental irrigator provided in an embodiment of the present application;

fig. 6 is an exploded view of the driving rotor and the driven rotor in the tooth irrigator according to the embodiment of the present application;

FIG. 7 is a schematic view of the structure of FIG. 6 at another view angle;

fig. 8 is a schematic perspective view of a spherical rotor pump in a tooth irrigator according to an embodiment of the present application;

FIG. 9 is a schematic plan view of the structure of FIG. 8 along the direction A;

fig. 10 is a cross-sectional view of a ball-shaped rotor pump in a dental irrigator according to an embodiment of the present application in another state;

fig. 11 is a schematic structural view of a second housing in the dental rinse provided in the embodiment of the present application;

FIG. 12 is a cross-sectional view taken along the direction B-B of FIG. 11;

FIG. 13 is an enlarged schematic view of a partial structure at C in FIG. 2;

fig. 14 is a sectional view showing a partial structure of a dental irrigator according to an embodiment of the present application;

Fig. 15 is a schematic structural view of a sustained release apparatus in a dental rinse according to an embodiment of the present application.

Reference numerals illustrate:

1. a body; 2. a spherical rotor pump; 3. a water tank; 4. a nozzle; 5. a water storage chamber; 6. a mounting bracket; 7. a seal; 8. a water drain pipe; 9. a water outlet pipe;

10. a tooth-flushing device; 21. a pump housing; 22. a driving rotor; 23. a driven rotor; 24. a variable volume cavity; 25. a bearing; 11. a locking member; 20. a slow release device;

211. a water inlet; 212. a water outlet; 213. an inner cavity; 214. a fixing seat; 215. a through hole; 216. a first housing; 217. a second housing; 218. a groove; 219. a rotating part; 221. a first rotor body; 222. a first rotor shaft; 223. a pin shaft portion; 231. a second rotor body; 232. a second rotor shaft; 233. a mating cavity; 201. a protective shell; 202. a slow release member; 203. a filter;

2161. a first boss; 2162. a first connection hole; 2171. a second boss; 2172. a water inlet channel; 2173. a water outlet channel; 2174. a second connection hole; 2231. a first plane; 2232. a first mating surface; 2311. a second mating surface; 2011. a liquid through hole; 2012. protecting the cavity.

Detailed Description

The technical solutions in the present application will be clearly and thoroughly described below with reference to the accompanying drawings. Wherein, in the description of the present application, "/" means or, unless otherwise indicated, for example, a/B may represent a or B: the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and in addition, in the description of the present application, "plural" means two or more than two.

The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

The tooth cleaning device is a tool for cleaning teeth and tooth gaps by using a pulse water flow impact mode. Generally, the tooth-flushing device is provided with a machine body, a water tank and a nozzle, wherein the water tank and the nozzle are arranged at two opposite ends of the machine body, a plunger pump is arranged in the machine body, the plunger pump is provided with a water inlet communicated with the water tank and a water outlet communicated with the nozzle, one-way valves are arranged at the water inlet and the water outlet for controlling water flow at the water inlet and the water outlet, water in the water tank is pumped into the nozzle through the plunger pump by opening or closing the one-way valves at the water inlet and the water outlet, and water is sprayed into an oral cavity through the nozzle to clean the oral cavity. However, in the above-mentioned dental irrigator, the one-way valve generates noise in the course of opening or closing the waterway, thus making the dental irrigator noisier when in operation; in addition, the check valve can be permanently deformed in the long-term opening and closing process, and the service life of the tooth washer can be influenced by failure of the check valve.

From this, this application embodiment provides a tooth flusher, and the noise is less and life is longer in the in-process of using.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 4, fig. 1 is a schematic structural view of a tooth-rinsing device according to an embodiment of the present application, fig. 2 is a schematic partial structural view of a tooth-rinsing device according to an embodiment of the present application, fig. 3 is an exploded view of a spherical rotor pump in a tooth-rinsing device according to an embodiment of the present application, and fig. 4 is a cross-sectional view of a spherical rotor pump in a tooth-rinsing device according to an embodiment of the present application. As shown in fig. 1 to 3, the present embodiment provides a tooth-cleaning device 10, which comprises a nozzle 4, a housing and a movement, wherein the housing comprises a body 1 and a water tank 3, specifically, when the water tank 3 is movable relative to the body 1, the vertical 3 and the housing of the body 1 are collectively referred to as the housing, the movement comprises a spherical rotor pump 2, the water tank 3 and the nozzle 4 are oppositely arranged at two ends of the body 1, the nozzle 4 is connected with the movement, a containing cavity (not shown in the drawing) is arranged in the body 1, a water storage cavity 5 is defined between the water tank 3 and the body 1, and the spherical rotor pump 2 is arranged close to the water tank 3. In this way, the waterway from the water storage chamber 5 to the spherical rotor pump 2 can be shortened, and the idle time of the tooth washer 10 can be reduced in the starting process, so that the temperature rise of the spherical rotor pump 2 caused by idle can be avoided from being too high, and the spherical rotor pump 2 fails.

In some embodiments, in order to shorten the path of water flowing from the water storage chamber 5 into the spherical rotor pump 2, the spherical rotor pump 2 is spaced from the top end of the body 1 by a greater distance than the spherical rotor pump 2 is spaced from the bottom end of the body 1 in the direction of extension of the body 1, wherein the top end is located above the bottom end in the direction of gravity. In this way, the water tank 3 is closer to the spherical rotor pump 2, so that the path of water flowing from the water storage cavity 5 into the spherical rotor pump 2 is also shorter, and the use performance of the tooth irrigator 10 provided by the embodiment is better.

Specifically, the spherical rotor pump 2 includes a pump casing 21, a driving rotor 22 and a driven rotor 23, a water inlet 211 and a water outlet 212 which are communicated with an inner cavity 213 of the pump casing 21 are formed on the pump casing 21, wherein the water inlet 211 and the water outlet 212 penetrate through 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 casing 21, the driving rotor 22 and the driven rotor 23 enclose to form a variable cavity 24, the position of the variable cavity 24 is changed in the circumferential direction in the process that the driving rotor 22 drives the driven rotor 23 to rotate together, the volume of the variable cavity 24 is changed periodically, the volume of the variable cavity 24 is increased when the variable cavity 24 is communicated with the water inlet 211, and the volume of the variable cavity 24 is reduced when the variable cavity 24 is communicated with the water outlet 212; wherein, during the operation of the active rotor 22, the water inlet 211 is always communicated with the water storage cavity 5, and the water outlet 212 is always communicated with the nozzle.

In this way, in the present embodiment, through the rotation of the driving rotor 22 and the driven rotor 23, the communication between the variable-volume cavity 24 and the water inlet and the communication between the variable-volume cavity 24 and the water outlet can be realized, the water inlet 211 is always communicated with the water storage cavity 5, and the water outlet 212 is always communicated with the nozzle 4. In addition, as the check valve is not arranged, the problem that the service life of the tooth cleaner 10 is influenced due to failure caused by deformation of the check valve is avoided, so that the service life of the tooth cleaner 10 provided by the embodiment is longer; in addition, the number of parts can be reduced without arranging the one-way valve, and the assembly efficiency of the tooth-flushing device 10 is improved; furthermore, without the provision of a one-way valve, the use of the dental irrigator 10 is not affected by the use of the one-way valve.

In some embodiments, to improve the usability of the dental appliance 10 provided in this example, the water tank 3 is slidably connected to the body 1 to change the volume of the water storage chamber 5. Like this, the user can then adjust the relative position between water tank 3 and the fuselage 1 according to the different demands of self to satisfy different demands, promote the performance of tooth flusher 10 that this embodiment provided.

As an alternative embodiment, the holding chamber is separated from the water storage chamber 5 by a first partition (not shown in the figure), on which a water drawing pipe 8 is provided, the water drawing pipe 8 extends into the water storage chamber 5, the water drawing pipe 8 is communicated with the spherical rotor pump 2, and the distance between the free end of the water drawing pipe 8 and the bottom of the water storage chamber 5 is between 0.5mm and 5mm, for example, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, etc. In this way, the spherical rotor pump 2 is enabled to pump the cleaning liquid in the water storage chamber 5, and excessive cleaning liquid remaining in the water storage chamber 5 can be avoided.

Wherein, the distance between the bottom of first baffle and the bottom of water storage chamber 5 is less than or equal to 30mm. For example 25mm, 20mm, 15mm, 10mm, 5mm etc., so that the spherical rotor pump 2 is as close as possible to the bottom wall of the water storage chamber (5), shortening the waterway between the spherical rotor pump 23 and the water storage chamber 5.

Further, in order to shorten the flow path of the water in the water drawing pipe 8, the axis of the water drawing pipe 8 is parallel to the height direction of the dental irrigator 10. In this way, the water flow path defined in the water drain pipe 8 can be shortened.

In some specific embodiments, the water tank 3 is slidably connected between a first position and a second position relative to the machine body 1, and in the first position, the water storage cavity 5 has the largest volume, and when the length of the water drawing pipe 8 is L1, the clearance between the bottom wall of the water storage cavity 5 and the bottom end of the machine body 1 is L2, and L2-L1 is less than or equal to 5cm. In this way, by limiting the relation between the clear distance between the bottom wall of the water storage cavity 5 and the bottom end of the machine body 1 and the length L1 of the water drawing pipe 8, not only can the water storage cavity 5 have a large enough volume, but also the occupied space of the tooth-rinsing device 10 provided by the embodiment is avoided to a certain extent because of the extension of the water tank 3, so that the service performance of the tooth-rinsing device 10 provided by the embodiment can be further improved; in addition, like this, can avoid intaking the water route overlength, lead to spherical rotor pump 2 dry to turn over time overlength, the condition that appears burning the pump.

In other specific embodiments, the length of the water drawing pipe 8 is L3, the spherical rotor pump 2 and the machine body 1 are connected through a communicating pipe, and the length of the communicating pipe is L4, and L3+L4 is less than or equal to 15cm. In this way, the length of the pipeline of the water drawing pipe 8 can be limited, and the excessive temperature rise of the spherical rotor pump 2 caused by the overlong pipeline can be avoided.

In some embodiments, the driving rotor 22 includes a first rotor body 221, a first rotor shaft 222 and a pin shaft 2233, the first rotor body 221 is in rotating fit with the cavity wall of the inner cavity 213, the first rotor shaft 222 and the pin shaft 2233 are connected to opposite ends of the first rotor body 221, and the first rotor shaft 222 is connected to a driving member or driving structure to drive the driving rotor 22 to rotate, and the pin shaft 2233 extends into the driven rotor 23 to be in movable fit with the driven rotor 23; the driven rotor 23 comprises a second rotor body 231, a second rotor shaft 232 and a matching cavity 233, the first rotor body 221, the second rotor body 231, a pin shaft portion 2233 and the pump shell 21 enclose to form a capacity variable cavity 24, the pin shaft portion 2233 stretches into the matching cavity 233 to be in rotary fit with the matching cavity 233, a fixed seat 214 is arranged in the inner cavity 213, and the second rotor shaft 232 stretches into the fixed seat 214 to be in rotary connection with the fixed seat 214.

To enable the volume of the variable volume chamber 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. In this way, the volume of the variable volume chamber 24 can be changed only when the driving rotor 22 drives the driven rotor 23 to rotate.

Referring to fig. 4, for example, an 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, and the value of the angle between the axial direction of the first rotor shaft 222 and the axial direction of the second rotor shaft 232 is not particularly limited.

In some embodiments, the pump housing 21 includes a pump housing body and two rotating parts 219 connected to the pump housing body, the two rotating parts 219 being disposed opposite to each other, the first rotor shaft 222 being in rotational engagement with one rotating part 219, and the second rotor shaft 232 being in rotational engagement with the other rotating part 219, wherein the fixing base 214 is disposed within the rotating part 219. In this way, not only the rotational fit of the second rotor shaft 232 with the fixing base 214 can be achieved, but also the position of the fixing base 214 can be defined so as to facilitate the assembly of the spherical rotor pump 2.

In order to connect the first rotor shaft 222 to the driving member or the driving structure, the rotation portion 219 of the pump housing 21, which is in rotation with the first rotor shaft 222, needs to be provided with a through hole 215, which is in rotation with the first rotor shaft 222, and the first rotor shaft 222 can be connected to the driving member or the driving structure by the provision of the through hole 215.

Further, in order to enhance the rotation smoothness of the first rotor shaft 222, a bearing 25 may be provided between the first rotor shaft 222 and the through hole 215. Thus, the smoothness of the rotation of the first rotor shaft 222 can be improved.

In some alternative embodiments, the driving member or driving structure may be a motor (not shown) disposed in the accommodating chamber, and a driving shaft of the motor is connected to the first rotor shaft 222; the motor is used for driving the driving rotor 22 to drive the driven rotor 23 to rotate together. In this way, for example, a gear transmission mechanism, a cam link mechanism and other transmission mechanisms can be omitted, and noise can be reduced by directly driving the driving rotor 22 to rotate through the motor because the transmission mechanism generates noise during operation.

It should be noted that, the connection between the driving shaft of the motor and the first rotor shaft 222 refers to that the driving shaft of the motor is directly connected to the first rotor shaft 222, for example, a connection manner such as welding, connecting by a threaded fastener, etc. may be adopted between the driving shaft of the motor and the first rotor shaft 222. Here, the connection manner between the drive shaft of the motor and the first rotor shaft 222 is not particularly limited.

In some embodiments, no position of the drive shaft is below the through hole 215 in the direction of the through hole 215 to the motor. So even when the fluid medium in the spherical rotor pump 2 leaks from the through hole 215, the fluid medium can not flow to the driving shaft under the action of gravity, and further the leaked fluid medium is prevented from spreading along the driving shaft to corrode the motor, so that the damage to the motor caused by water leakage of the spherical rotor pump 2 can be avoided, and the service life of the tooth washer 10 is ensured.

Optionally, the water storage cavity 5 is located below the accommodating cavity, and the spherical rotor pump 2 and the motor are arranged along the horizontal direction of the machine body 1. The water storage cavity 5 can be located below the accommodating cavity, so that the fluid medium in the water storage cavity 5 is prevented from flowing to the accommodating cavity under the action of gravity, and the safety of parts located in the accommodating cavity is improved. And the spherical rotor pump 2 and the motor are arranged in the horizontal direction of the body 1. The space occupied by the spherical rotor pump 2 and the motor in the vertical direction is reduced, so that the space of the water storage cavity 5 can be further vacated to contain more fluid media such as water.

In other embodiments, the spherical rotor pump 2 and the motor are arranged in an inclined arrangement within the mounting cavity. This reduces the relative area of the motor and the ball rotor pump 2 in the vertical direction of the machine body 1, and thus can also function to prevent water leaking from the ball rotor pump 2 from flowing to the motor under the action of gravity.

Optionally, the water outlet 212 is located above the pump housing 21. It will be appreciated that the water outlet 212 of the pump housing 21 communicates with the nozzle 4 via a water outlet line so that the fluid medium within the ball rotor pump 2 may be ejected through the nozzle 4. The nozzle 4 is located above the spherical rotor pump 2, so that the water outlet 212 of the pump housing 21 is opened above the pump housing 21 to make the water outlet 212 closer to the nozzle 4 in order to reduce the water flow rate caused by the change of the water pipe aperture due to the multiple bending of the water outlet pipeline. In other embodiments, the water outlet 212 extends along the horizontal direction of the pump housing 21, which not only facilitates the installation of the water outlet pipeline.

Alternatively, the pump housing 21 and the motor are arranged in the vertical direction of the body 1. Namely, the pump shell 21 of the spherical rotor pump 2 is positioned under the motor, so that the volume of the pump shell 21 and the motor in the horizontal direction of the machine body 1 can be effectively reduced, and meanwhile, the batteries and the circuit board in the machine body 1 can be arranged in a strip shape, so that the batteries and the circuit board are also conveniently positioned at adjacent positions in the horizontal direction of the pump shell 21 and the motor, the arrangement in the accommodating cavity is more compact, and the volume of the tooth washer 10 is further reduced.

Further, the length extending direction of the driving shaft is the same as the length extending direction of the machine body 1, and the extending direction of the second rotor shaft 232 is disposed at an angle with the driving shaft. The outer contour of the pump housing 21 lies within the outer contour of the motor in the projection in the axial direction of the drive shaft. On the basis that the pump shell 21 and the motor are arranged along the vertical direction of the machine body 1, the installation width of the motor in the accommodating cavity is larger than the installation width of the pump shell 21 of the spherical rotor pump 2 in the accommodating cavity. Therefore, when the motor and the spherical rotor pump 2 are installed, the pump shell 21 of the spherical rotor pump 2 can be also accommodated in the accommodating cavity by reserving the space of the installation width of the motor, and no additional measurement is needed, so that the installation is convenient, and the installation efficiency is improved.

In other embodiments, the length of the second rotor shaft 232 extends in the same direction as the length of the main body 1, and the driving shaft extends in a direction that forms an angle with the driven rotor 23. In projection along the extension of the second rotor shaft 232, the outer contour of the motor is located within the outer contour of the pump housing 21. So on the basis that pump case 21 and motor arrange along the vertical direction of fuselage 1 and set up, the installation width of motor in the holding intracavity is less than the installation width of pump case 21 in the holding intracavity, so when installing motor and spherical rotor pump 2, only need remain the space that can hold the installation width of pump case 21 in the holding intracavity, alright hold the motor equally, need not to additionally measure to make simple to operate, improve installation effectiveness.

In some alternative embodiments, the drive shaft and the first rotor shaft 222 are cooperatively secured by a pin connection. So drive shaft and first rotor shaft 222 pass through the pin connection and directly fix, need not drive mechanism settings such as drive gear, retrench the structure between motor and the spherical rotor pump 2, the noise reduction, and the axial dimensions of motor and spherical rotor pump 2 is little, vacates more space to further reduce the size of tooth flusher 10, be favorable to the product miniaturization.

The dental irrigator 10 of this embodiment may further include a second partition (not shown) connected to the main body 1 to divide the accommodating cavity into a first chamber and a second chamber. The second partition plate is provided with a through hole communicated with the first cavity and the second cavity, the motor is positioned in the first cavity, the spherical rotor pump 2 is positioned in the second cavity, and the driving shaft passes through the through hole to penetrate through the through hole 215 and is connected with the spherical rotor pump 2. The second partition plate separates the accommodating cavity to form a first cavity and a second cavity, so that the motor and the spherical rotor pump 2 are respectively positioned in the two cavities, and the driving shaft is connected with the first rotor shaft 222 only through a through hole penetrating through the second partition plate, so that the waterproof effect on the motor can be further improved, and the possibility that fluid media such as water in the spherical rotor pump 2 directly contact the motor is further reduced.

Optionally, the electrical connection of the motor is located on the side of the motor facing away from the through hole 215. Wherein, the electric connection line of this motor can be with circuit board or battery electric connection, and through making the electric connection line lie in the motor and deviate from the one side of through-hole 215, make the electric connection line keep away from the department of leaking of spherical rotor pump 2 to further improve the waterproof to the motor.

In some embodiments, the through hole 215 is located below the motor. By completely positioning the through hole 215 below the motor, fluid media such as water leaked from the through hole 215 can be prevented from flowing to the motor directly under the action of gravity, so that the damage to the motor caused by water leakage of the spherical rotor pump 2 can be avoided, and the service life of the tooth washer 10 can be ensured. Of course, in other embodiments, the through hole 215 may be flush with the motor, or the through hole 215 may be partially located below the motor, which may be selected by those skilled in the art according to the waterproof effect.

In the dental caries device 10 provided in the present embodiment, the movement 20 may further include a water baffle (not shown in the drawings), which is connected to the driving shaft and located at a side of the through hole 215 facing the motor. By providing the water baffle, even if a part of water splashes out of the through hole 215 of the pump housing 21 of the spherical rotor pump 2, the water is blocked by the water baffle to further improve the water resistance to the motor.

Referring to fig. 5 to 7, fig. 5 is an exploded view of a spherical rotor pump in a tooth-rinsing device according to an embodiment of the present application, fig. 6 is an exploded structure schematic diagram of a driving rotor and a driven rotor in the tooth-rinsing device according to an embodiment of the present application, and fig. 7 is a structure schematic diagram of fig. 6 at another view angle. As shown in fig. 5 to 7, the first rotor body 221 and the second rotor body 231 form a spherical rotator; the driving rotor 22 further includes a pin shaft portion 223, the pin shaft portion 223 and the first rotor shaft 222 being connected to opposite ends of the first rotor body 221; the second rotor body 231 is provided with a matching cavity 223 which is in rotating fit with the pin shaft part 223; the pin end surfaces at both ends of the pin shaft portion 223 each include a first plane 2231, and the plane in which the first plane 2231 is located intersects the axial direction of the pin shaft portion 223.

It should be noted that, the pin shaft portion 223 may be a cylinder or a partial cylinder structure of a cylinder, the axial direction of the pin shaft portion 223 refers to a direction parallel to the axial line of the pin shaft portion 223, and when the pin shaft portion 223 is in a long shape, the axial direction of the pin shaft portion 223 is parallel to the length direction of the pin shaft portion 223; the intersection of the plane of the first plane 2231 and the axial direction of the pin shaft portion 223 means that the plane of the first plane 2231 is not parallel to the axial direction of the pin shaft portion 223, and the plane of the first plane 2231 forms an included angle with the axial direction of the pin shaft portion 223. Preferably, the plane of the first plane 2231 is perpendicular to the axial direction of the pin shaft portion 223, and of course, the angle formed by the plane of the first plane 2231 and the axial direction of the pin shaft portion 223 may be other angles, such as 30 degrees, 45 degrees, 60 degrees, 75 degrees, or the like.

It will be appreciated that, in the related art, the end surfaces at the two ends of the pin shaft portion 223 are generally spherical cambered surfaces, so that the pin shaft end surfaces at the two ends of the pin shaft portion 223 protrude out of the first rotor body 221, when the driving rotor 22 is formed by adopting a single-side demolding mold, the pin shaft end surfaces of the pin shaft portion 223 are wrapped by a mold, so that the mold is easy to form a back-off at the pin shaft end surfaces, and difficult to be demolded, while when the driving rotor 22 is formed by adopting a double-side demolding mold, although the problem of difficult to be demolded can be solved, a mold-closing line can be formed at the mold-separating surface during double-side demolding, the accuracy of the spherical surface of the driving rotor 22 cannot be ensured, and the manufacturing defect of poor installation and matching can be easily caused.

In this application, at least part of the pin end surface of the pin shaft portion 223 is the first plane 2231 intersecting with the axial direction of the pin shaft portion 223, so that the protruding degree of the pin end surface can be reduced, when the driving rotor 22 is formed by adopting the single-side demolding mold processing, the mold is not easy to form a back-off at the pin end surface of the pin shaft portion 223, so that demolding is more convenient, the driving rotor 22 can be formed in a mode of normally using the single-side demolding mold processing, the driving rotor 22 is not required to be formed by adopting the double-side demolding mold processing, the precision of the spherical surface of the driving rotor 22 can be ensured, the driving rotor 22 is not easy to be blocked when rotating, and meanwhile, the secondary processing treatment is not required to be carried out on a parting line, so that the production yield of the driving rotor 22 can be improved, and the production cost of the spherical rotor pump is reduced.

It should be further noted that the pin end surface may only include the first plane 2231, and at this time, the first plane 2231 is the pin end surface, so as to greatly reduce the protruding degree of the pin end surface, so that demolding is more convenient when the driving rotor 22 is formed by adopting a single-side demolding mold; the pin end surface may also include a first plane 2231 and a curved surface, so that the connection tightness between the pin end surface and the inner wall surface of the inner cavity 213 may be improved on the basis of reducing the protrusion degree of the pin end surface, and thus the tightness between the pin end surface and the inner wall surface of the inner cavity 213 may be improved. In some embodiments of the present application, the shape of the first plane 2231 is circular, so that the first plane 2231 can be prevented from having an angular structure, and the friction between the angular structure and the inner wall surface of the inner cavity 213 during the rotation of the spherical rotator can be prevented from affecting the normal rotation of the spherical rotator.

Further, the first flat surface 2231 has a diameter R1, the pin shaft portion 223 has a diameter R2,to ensure that the area of the first plane 2231 is large enough, so that when the driving rotor 22 is formed by adopting a single-side demolding mold, the mold is not easy to form a back-off at the pin end face of the pin shaft portion 223, and the demolding is more convenient. R1 may be equal to->Or R2, etc.

Preferably, R1 is equal to R2, where the first plane 2231 is the end face of the pin, so as to minimize the possibility of the mold forming a back-off at the end face of the pin portion 223 when the driving rotor 22 is formed by machining with a single-sided demolding mold.

In some embodiments of the present application, the spherical swivel has a ball diameter R3,it will be appreciated 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, the pin shaft portion 223 receives compression stress and partial friction force of the driving rotor 22 and the driven rotor 23 when the spherical rotator rotates, and the pin shaft portion 223 receives compression force and partial friction forceSteering force, when the diameter R2 of the pin shaft portion 223 is smaller 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, and the like, so that the driving rotor 22 and the driven rotor 23 cannot be matched, and the spherical rotor pump cannot work normally, and when the diameter R2 of the pin shaft portion 223 is larger, the volume of the volume-variable chamber 24 is smaller, and the diameter R2 of the pin shaft portion 223 is larger than- >When the diameter R2 of the pin shaft portion 223 is too large, the volume of the variable-volume chamber 24 is too small, which affects the pumping efficiency of the spherical rotor pump 2, and in addition, the larger the diameter R2 of the pin shaft portion 223, the larger the size of the pin shaft end surface, the easier the mold is to form a reverse buckle at the pin shaft end surface of the pin shaft portion 223 when the driving rotor 22 is formed by using a single-side demolding mold processing mode, and the more difficult it is to ensure the sealing between the pin shaft end surface and the inner wall surface of the inner cavity 213, so that the liquid in the variable-volume chamber 24 is easy to leak out through the gap between the pin shaft end surface and the inner wall surface of the inner cavity 213. Wherein R2 may be equal to->Or (b)Etc.

In some embodiments of the present application, the pin shaft portion 223 has a length L,it should be noted that, 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, and the like, which causes that the driving rotor 22 and the driven rotor 23 cannot cooperate, and thus the spherical rotor pump cannot work normally, the length L of the pin shaft portion 223 is too large, so that the pin shaft end surface of the pin shaft portion 223 easily protrudes out of the first rotor body 221, and the pin shaft is formed in a mode of processing using a single-sided demolding moldWhen driving the rotor 22, the easier the mold forms a back-off at the pin end face of the pin portion 223, and the harder the seal between the pin end face and the inner wall face of the inner cavity 213 is ensured, so that the liquid in the variable-volume chamber 24 is likely to leak out through the gap between the pin end face and the inner wall face of the inner cavity 213. Wherein L may be equal to Or->Etc. />

Further, the diameter of the pin portion 223 is greater than 2mm. The diameter of the pin shaft 223 may be 3mm, 4mm, 5mm, etc., so that the pin shaft 223 is limited to have a diameter greater than 2mm, so as to ensure the structural strength of the pin shaft 223, avoid the occurrence of the situation of the deviation of the driving rotor 22 caused by the insufficient strength of the pin shaft 223, and ensure the rotation stability of the driving rotor 22.

In some embodiments of the present application, 10 mm.ltoreq.R3.ltoreq.18 mm. It should be noted that, when the shape of the pin end surface of the pin shaft portion 223 is changed, the sealing performance of the volume-variable cavity 24 is reduced, so that the pumping efficiency of the spherical rotor pump 2 is reduced, and the pumping efficiency of the spherical rotor pump 2 is also related to the spherical diameter R3 of the spherical rotor, and the larger the spherical diameter R3 of the spherical rotor is, the higher the pumping efficiency of the spherical rotor pump 2 is, so that when the spherical diameter R3 of the spherical rotor is too small, the pumping efficiency of the spherical rotor pump 2 cannot meet the product performance requirement of the dental irrigator 10 provided by the embodiment.

In addition, the size of the pump housing 21 depends on the ball diameter R3 of the spherical rotator, in general, the larger the ball diameter R3 of the spherical rotator, the larger the size of the pump housing 21, if the ball diameter R3 of the spherical rotator is excessively large, which may result in the size of the pump housing 21 being excessively large, and when the spherical rotor pump 2 is applied to the tooth irrigator 10, since the size of the tooth irrigator 10 is generally fixed, the size of the motor installed in the tooth irrigator 10 is also relatively fixed, the spherical rotor pump 2 may occupy more lateral space due to protruding from the motor, which may reduce the space utilization of the tooth irrigator 10, wherein the lateral direction is a direction perpendicular to the length direction of the tooth irrigator 10.

In some embodiments, 11 millimeters R3 is less than or equal to 14 millimeters, where R3 may be 11 millimeters, 12 millimeters, 12.5 millimeters, 13 millimeters, 14 millimeters, or other values.

In other embodiments, the diameter of the spherical body is greater than 6mm. The diameter of the spherical body can be 7mm, 8mm, 9mm and the like, so that the volume size of the spherical body is ensured, and the situation that the faster the temperature rise is caused by the excessively small volume of the spherical body, the more easily the blocking is caused is avoided. Ensuring normal rotation of the driving rotor 22 and the driven rotor 23.

In some embodiments of the present application, the driving rotor 22 is a plastic rotor, that is, the preparation material of the driving rotor 22 is plastic, the density of the plastic is smaller, and on the basis of the unchanged volume of the driving rotor 22, the weight of the driving rotor 22 can be reduced, so that the weight of the spherical rotor pump can be reduced, and the driving rotor 22 can be integrally injection molded through the plastic, so that machining can be reduced, and the production efficiency of products can be improved.

It should be noted that, the driven rotor 23 may also be a plastic rotor, so that the driven rotor 23 has a light weight, and thus the weight of the ball rotor pump may be further reduced.

The driving rotor 22 or the driven rotor 23 may be made of plastic materials such as PC (Poly carbons), PET (Poly Ethylene Terephthalate ), PP (polypropylene), and POM (Poly Oxy Methylene ). Because the plastic production mode is simple, the driving rotor 22 or the driven rotor 23 can be integrally injection molded through a die, so that the production efficiency is improved. Of course, in order to further improve the production efficiency, the driving rotor 22 and the driven rotor 23 may be made of plastic materials at the same time.

In another embodiment, the driving rotor 22 or the driven rotor 23 is made of metal, and it is understood that the driving rotor 22 may be a metal rotor, and the driven rotor 23 may be a metal rotor. The driving rotor 22 or the driven rotor 23 can be integrally made of copper, steel, aluminum or alloy with good self-lubricating capability through metal forging or machining, so that the driving rotor 22 or the driven rotor 23 has high structural strength, is not easy to crush, is wear-resistant, has long service life and is not easy to leak water after long-time use. Of course, in order to further improve the production efficiency, the driving rotor 22 and the driven rotor 23 may be made of plastic materials at the same time.

In some embodiments of the present application, there is a gap between the spherical swivel and the inner wall surface of the inner cavity 213, and the spacing between the spherical swivel and the inner wall surface of the inner cavity 213 is greater than or equal to 0.01 mm and less than or equal to 0.03 mm. It can be understood that when the interval between the spherical rotator and the inner wall surface of the inner cavity 213 is less than 0.01 mm, the interval between the spherical rotator and the inner wall surface of the inner cavity 213 is too small, and particle impurities are easily caught between the spherical rotator and the inner wall surface of the inner cavity 213, resulting in a main body of the spherical rotator; when the interval between the spherical rotator and the inner wall surface of the inner cavity 213 is greater than 0.03 mm, the interval between the spherical rotator and the inner wall surface of the inner cavity 213 is too large, and the tightness between the spherical rotator and the inner wall surface of the inner cavity 213 is poor, resulting in easy water leakage of the variable volume chamber 24 and affecting the pumping efficiency of the spherical rotor pump. The spacing between the ball-shaped swivel and the inner wall surface of the cavity 213 may be 0.01 mm, 0.02 mm, 0.03 mm or other values.

In an embodiment of the present application, the edge of the end face of the pin shaft is abutted against the inner wall surface of the inner cavity 213, so that water leakage of the variable-volume cavity 24 is not easy to occur during the rotation process of the spherical rotator.

In order to install the motor, a mounting bracket 6 can be arranged in the accommodating cavity, and the motor is mounted on the mounting bracket 6.

In order to avoid the suspended arrangement of the spherical rotor pump 2, the pump housing 21 may be abutted against the inner wall of the accommodating cavity, specifically, one end of the pump housing 21 facing away from the motor may be abutted against the inner wall of the accommodating cavity, that is, an outer sidewall of one end of the pump housing 21 connected with the driven rotor 23 may be abutted against the inner wall of the accommodating cavity. In this way, the suspended installation of the spherical rotor pump 2 can be avoided, and the spherical rotor pump 2 can be prevented from generating large noise due to large amplitude.

Referring to fig. 2, by way of example, when the motor is located at the top end of the spherical rotor pump 2, the bottom end of the spherical rotor pump 2 may abut against the inner wall of the receiving chamber; when the motor and the spherical rotor pump 2 are distributed in the horizontal direction in fig. 2, the side of the spherical rotor pump 2 facing away from the motor in the horizontal direction can be abutted against the inner wall of the accommodating cavity. Here, the relative positions of the motor and the spherical rotor pump 2 are not particularly limited.

Since the spherical rotor pump 2 vibrates to generate noise during the operation of the dental irrigator 10, a first buffer member, not shown in the drawing, may be provided between the pump housing 21 and the inner wall of the receiving chamber in order to avoid noise generated due to the vibration of the spherical rotor pump 2. Thus, the vibration generated by the spherical rotor pump 2 can be relieved and the noise can be reduced by the arrangement of the first buffer member.

Further, since the motor may also vibrate to generate noise during operation of the dental appliance 10, a second buffer, not shown, may be provided between the motor and the mounting bracket 6. The vibration of the motor can be relieved through the arrangement of the second buffer piece, so that noise is further reduced.

In some embodiments, the first cushioning member and the second cushioning member may be made of an elastic material, such as rubber. Here, the type of material from which the first cushioning member and the second cushioning member are made is not limited.

In other embodiments, the spherical rotor pump 2 is spaced from the inner wall of the receiving cavity along the circumference of the dental impactor 10. In this way, the vibration generated when the spherical rotor pump 2 works can be prevented from being transmitted to the inner wall of the accommodating cavity to a certain extent, so that the tooth irrigator 10 provided by the embodiment has better usability.

In some alternative embodiments, in order to reduce noise generated during rotation of the driving rotor 22, at least one of the driving rotor 22, the driven rotor 23, and the pump housing 21 is filled with carbon fibers, that is, at least one of the driving rotor 22, the driven rotor 23, and the pump housing 21 is made of a material mixed with carbon fibers. Here, other materials of which the driving rotor 22, the driven rotor 23, or the pump housing 21 are made are not limited. In this way, the lubrication capability of the driving rotor 22 and/or the driven rotor 23 and/or the pump casing 21 can be improved, so that the driving rotor 22 rotates more smoothly relative to the pump casing 21, and noise generated during rotation of the driving rotor 22 is reduced.

With continued reference to fig. 8 and 9, fig. 8 is a schematic perspective view of a spherical rotor pump in a tooth irrigator according to an embodiment of the present application, and fig. 9 is a schematic plan view of fig. 8 along a direction a. In some alternative embodiments, to facilitate assembling the spherical rotor pump 2, the pump housing 21 includes a first housing 216 and a second housing 217 disposed opposite to each other, the first housing 216 and the second housing 217 each have a rotation portion 219, the first housing 216 and the second housing 217 enclose an inner cavity 213, the through hole 215 is formed on the rotation portion 219 of the first housing 216, the water inlet 211 and the water outlet 212 are formed on the second housing 217, and the driven rotor 23 is located in the second housing 217.

In order to realize the connection between the first housing 216 and the second housing 217, the end of the first housing 216, which is close to the second housing 217, is provided with a first boss 2161, the end of the second housing 217, which is close to the first housing 216, is provided with a second boss 2171, the first boss 2161 and the second boss 2171 are abutted together to form a boss structure, and in the process of assembling 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 housing 216 and the second housing 217 together.

Illustratively, the first boss 2161 has a first connection hole 2162 thereon, and the second boss 2171 has a second connection hole 2174 opposite to the first connection hole 2162 thereon; the first boss 2161 and the second boss 2171 are coupled together by fasteners penetrating the first and second coupling holes 2162 and 2174. Here, the connection between the first housing 216 and the second housing 217 is not particularly limited.

As shown in fig. 4, during operation of the dental appliance 10, the first housing 216 and the second housing 217 may be offset, and in order to avoid a relative offset between the first housing 216 and the second housing 217, in some embodiments, a locking member 11 may be disposed outside the boss structure, where the locking member 11 is used to lock the first boss 2161 and the second boss 2171 together. In this way, force can be applied to the first housing 216 and the second housing 217 to avoid the offset between the first housing 216 and the second housing 217 to some extent, so that noise can be reduced; in addition, the sealing performance between the first housing 216 and the second housing 217 can be improved, and water leakage can be avoided to some extent.

In some alternative embodiments, the locking member 11 is an elastic member, and the elastic member is sleeved outside the boss structure.

It should be noted that the elastic member may be a soft rubber elastic member. Here, the material of the elastic member is not particularly limited.

In some embodiments, the first rotor body 221 may include an inner support portion (not shown) connected to the first rotor shaft 222 and an outer cover portion (not shown) covering an outer circumference of the inner support portion, and the inner support portion is made of a metal material.

The inner support portion may be made of metal materials such as copper, steel, aluminum or alloy, so as to improve the overall structural strength of the active rotor 22. The outer covering part may be directly formed to cover the outer periphery of the inner supporting part, or may be detachably connected to the inner supporting part by a buckle or the like. The first rotor body 221 is composed of an inner supporting portion and an outer covering portion covering the outer periphery of the inner supporting portion, so that the first rotor body 221 can be made of two materials, the structural strength of the driving rotor 22 can be ensured, and the material of the contact surface between the driving rotor 22 and the first housing 216 can be controlled conveniently, so that the rotation stability of the driving rotor 22 can be ensured.

Further, the first rotor shaft 222 is of unitary construction with the inner support. So as to ensure the structural strength of the first rotor shaft 222, when the driving rotor 22 and the driven rotor 23 are enclosed with the inner wall surface of the housing 10 to form a plurality of variable-volume chambers 24, the first rotor shaft 222 is not easy to deviate due to inconsistent pressures in the plurality of variable-volume chambers 24, thereby avoiding the aggravated abrasion caused by the extrusion of the driving rotor 22 on the inner wall of the first housing 216 and ensuring the normal service life of the driving rotor 22.

Optionally, the outer cover is made of plastic material. Wherein, the material of the outer cover part can be PEEK (Poly Ether Ether Ketone ) with the thermal expansion coefficient ranging from 29×10-6/DEG C to 50×10-6/DEG C, POM and CF (Carbon Fiber) with the thermal expansion coefficient of 11×10-6/DEG C, PPS (Poly Phenylene Sulfide ) and CF with the thermal expansion coefficient ranging from 30×10-6/DEG C to 50×10-6/DEG C, and the PPS and the metal material have very high bonding strength so as to ensure the structural strength of the outer cover part, or PTFE (Poly Tetra Fluoro Ethylene ) and CF materials with self-lubricating effect are selected, which is beneficial to the relative movement of the active rotor 22. Namely, the outer cover part made of the plastic material has good stability, lower shrinkage, high temperature resistance of more than 100 ℃ and wear resistance, so that the normal use of the driving rotor 22 is ensured.

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

The first housing 216 and the second housing 217 may be made of a material resistant to high temperature (above 100 ℃), resistant to wear, and self-lubricating, such as plastic, etc., and it is understood that the material of the driven rotor 23 is the same as that of the driving rotor 22, and the material of the first housing 216 is the same as that of the second housing 217, so that the manufacturing is easy, and only the thermal expansion coefficient of the driving rotor 22 is controlled to be smaller than that of the first housing 216 or the thermal expansion coefficient of the driven rotor 23 is controlled to be smaller than that of the second housing 217.

Since the driving rotor 22 is rotationally connected with the first housing 216, the thermal expansion coefficient of the driving rotor 22 is smaller than that of the first housing 216, so that the volume change of the first housing 216 is larger than that of the driving rotor 22, and the gap between the first housing 216 and the driving rotor 22 is prevented from being reduced to influence the rotation of the driving rotor 22. Similarly, since the driven rotor 23 is rotatably connected to the second housing 217, the thermal expansion coefficient of the driven rotor 23 is made smaller than that of the second housing 217, so that the volume change of the second housing 217 is made larger than that of the driven rotor 23, to avoid that the clearance between the second housing 217 and the driven rotor 23 becomes smaller to affect the rotation of the driven rotor 23. Of course, in order to further secure the rotational stability of the driving rotor 22 and the driven rotor 23, the coefficient of thermal expansion of the driving rotor 22 may be made smaller than that of the first housing 216 and the coefficient of thermal expansion of the driven rotor 23 may be made smaller than that of the second housing 217 at the same time.

Optionally, a distance between a center of the inner support portion and an outer circumference of the inner support portion is greater than a distance from an inner circumference to an outer circumference of the outer cover portion. Therefore, the inner supporting portion can provide enough supporting strength for supporting the outer covering portion, the overall structural strength of the driving rotor 22 is improved, and the rotation stability of the driving rotor 22 is ensured.

Further, the distance from the inner periphery to the outer periphery of the outer cover is greater than 1.5mm. Wherein, the distance between the inner periphery of the cover part and the outer periphery can be 2mm, 3mm, 4mm and the like, thereby ensuring the thickness value of the outer cover part, further avoiding the collapse caused by insufficient structural strength of the outer cover part, further improving the overall structural strength of the driving rotor 22 and ensuring the rotating stability of the driving rotor 22.

Optionally, the inner support portion extends at least partially into the pin shaft portion 223. Wherein, because the pin shaft portion 223 is the main stress part, the inner supporting portion made of metal material at least partially stretches into the pin shaft portion 223, so as to further improve the structural strength of the pin shaft portion 223.

In some embodiments, the clearance between the outer periphery of the side of the first rotor body 221 near the pin shaft portion 223 and the inner wall surface of the first housing 216 is smaller than the clearance 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 housing 216. Wherein, in the water pumping process, water is provided in the volume-changing cavity 24, the water has cooling capability, and because the part of the first rotor body 221 close to the pin shaft part 223 is closer to the volume-changing cavity 24, namely, the cooling effect of the part of the first rotor body 221 close to the pin shaft part 223 is better than that of the part of the first rotor body 221 far from the pin shaft part 223, the deformation of the part of the first rotor body 221 far from the pin shaft part 223 is larger than that of the first rotor body 221 close to the pin shaft part 223, so that the clearance between the outer periphery of the side of the first rotor body 221 close to the pin shaft part 223 and the inner wall surface of the first shell 216 is smaller than that between the outer periphery of the side of the first rotor body 221 far from the pin shaft part 223 and the inner wall surface of the first shell 216, thereby ensuring the normal rotation of the driving rotor 22.

Further, in order to improve 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; at least one of the first housing 216 and the second housing 217 is provided with a groove 218 into which the seal 7 is fitted. In this way, when the spherical rotor pump 2 is assembled, the sealing performance between the first housing 216 and the second housing 217 can be further improved by the fixed connection between the first housing 216 and the second housing 217 being pressed, and the sealing action of the seal 7 being combined.

In some embodiments, the sealing member 7 may be a sealing ring, and the groove 218 may be formed on the first housing 216 and the second housing 217 at the same time, and is an annular groove. Here, the shape of the seal 7 and the opening position of the groove 218 are not particularly limited.

Further, in some embodiments, the first rotor body (221) includes first mating surfaces (2232) located at both sides of the pin shaft portion (223), the second rotor body 231 has a second mating surface 2311 on a side facing the first rotor body 221, and the mating cavity 223 is located at the second mating surface 2311 and extends along an axial direction of the pin shaft portion 223 to penetrate both sides of the second rotor body 231; the second mating surface 2311 is located at two sides of the mating cavity 223, and extends obliquely along a direction away from the mating cavity 223 and away from the first rotor body 221, and when the driven rotor 23 rotates until the second mating surface 2311 is opposite to the water inlet 211 or the water outlet 212, the second mating surface 2311 is located at one side of the water inlet 211 and the water outlet 212 near the first housing 216, so that the water inlet 211 and the water outlet 212 are communicated with the variable volume cavity 24.

The volume-variable chamber 24 is defined by the second mating surface 2311 and the inner wall surfaces of the first rotor body 221 and the inner chamber 213, and the portions of the second mating surface 2311 on both sides of the mating chamber 223 are inclined, so that the volume of the volume-variable chamber 24 can be increased, and the pumping efficiency of the spherical rotor pump 2 can be improved.

With continued reference to fig. 10, fig. 10 is a cross-sectional view of the spherical rotor pump in the dental irrigator according to an embodiment of the present application in another state. As shown in fig. 10, in an embodiment of the present application, when the volume of the variable volume chamber 24 is the smallest, the first mating surface 2232 forming the variable volume chamber 24 is disposed at an angle with the second mating surface 2311. Here, when the volume value of the volume-variable chamber 24 is set to be M when the volume is minimized, it should be noted that, compared to the arrangement of the first mating surface 2232 and the second mating surface 2311 forming the volume-variable chamber 24 in parallel, by adopting this arrangement of the present embodiment, the probability that the first mating surface 2232 and the corresponding second mating surface 2311 adhere to each other is reduced, and space is ensured to avoid particulate impurities, so that the value of the volume-variable chamber M is relatively smaller, the influence on the volume variation range of the volume-variable chamber 24 is relatively smaller, and thus the influence on the pump fluid efficiency of the spherical rotor pump is smaller, and the self-priming effect of the spherical rotor pump is lower when M is larger, so that the influence on the self-priming performance of the spherical rotor pump can be reduced by adopting this arrangement of the present embodiment.

The included 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 are not specifically limited herein.

In another embodiment of the present application, when the volume of the variable volume chamber 24 is at a minimum, the first mating surface 2232 and the second mating surface 2311 are parallel to each other. It can be appreciated that, compared to the arrangement in which the first mating surface 2232 and the second mating surface 2311 form an included angle, by adopting the arrangement of the embodiment, the first mating surface 2232 and the second mating surface 2311 are not bonded at all, so that the probability of adhesion between the first mating surface 2232 and the corresponding second mating surface 2311 can be further reduced, and the reliability of the spherical rotor pump 2 can be further improved; in addition, the spacing between the first mating surface 2232 and the second mating surface 2311 at any position is equal, and 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, the space is provided at any position between the first mating surface 2232 and the second mating surface 2311 to avoid the particulate impurities, so that the probability that the particulate impurities enter the variable-volume cavity 24 to cause abrasion or jamming of the driving rotor 22 or the driven rotor 23 can be further reduced.

In another embodiment of the present application, when the volume of the volume-variable cavity 24 is the smallest, the maximum distance between the first mating surface 2232 and the second mating surface 2311 is d, where d is 0.5 mm and d is 2 mm, and d may be 0.5 mm, 1 mm, 1.2 mm, 1.5 mm, 2 mm, or other values.

It should be noted that, when the volume of the variable volume chamber 24 is minimum, if the first mating surface 2232 and the second mating surface 2311 are disposed at an included angle, the maximum distance between the first mating surface 2232 and the second mating surface 2311 is the outer edge of the variable volume chamber 24, and if the first mating surface 2232 and the second mating surface 2311 are parallel to each other, the distance between any positions of the first mating surface 2232 and the second mating surface 2311 is the maximum distance.

It should be further 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, so that the particulate impurities easily enter the variable-volume cavity 24 to cause the driving rotor 22 or the driven rotor 23 to wear or jam; 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 great influence on the pumping efficiency and the self-priming effect of the spherical rotor pump.

With continued reference to fig. 11 and 12, fig. 11 is a schematic structural view of the second housing in the dental caries device according to the embodiment of the present application, and fig. 12 is a cross-sectional view along the direction B-B of fig. 11. As shown in fig. 11 and 12, the spherical rotor pump 2 is formed with a water inlet 2172 and a water outlet 2173, the water inlet 2172 communicates with the water storage chamber 5, the water outlet 2173 communicates with the nozzle 4, the water inlet 211 is formed at the water outlet end of the water inlet 2172, and the water outlet 212 is formed at the water inlet end of the water outlet 2173.

In order to reduce noise generated by the water flow during the flow, in some alternative embodiments the water inlet end of the water inlet channel 2172 is directed towards the water storage chamber 5; and/or the water outlet end of the water outlet channel 2173 is directed towards 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 to reduce noise generated during the flow of the water flow.

Further, in some alternative embodiments, the axis of the water inlet channel 2172 is straight; and/or the axis of the water outlet channel 2173 is straight. In this way, the flow direction of the water flow in the water inlet channel 2172 and the water outlet channel 2173 is relatively fixed, the number of times of turning the water flow in the water inlet channel 2172 and the water outlet channel 2173 can be further reduced, and noise generated in the flowing process of the water flow is reduced.

With continued reference to fig. 13, fig. 13 is an enlarged schematic view of a partial structure at C in fig. 2. In some embodiments, the water outlet channel 2173 communicates with the nozzle 4 through a water outlet pipe 9.

In order to prevent more impurities such as particulate matters from entering the spherical rotor pump 2, a filter screen may be provided in at least one of the water intake passage 2172 and the water drawing pipe 8. Like this, then can avoid particulate matter to get into in the spherical rotor pump 2 to a certain extent, then can avoid causing the wearing and tearing and the jamming of spherical rotor pump 2 for the rivers that flow into in the spherical rotor pump 2 are comparatively pure, not only can reduce the noise that rivers produced in the flow in-process but also can avoid producing the influence to the life of spherical rotor pump 2 because the impure of rivers.

With continued reference to fig. 14 and 15, fig. 14 is a cross-sectional view illustrating a partial structure of a tooth-rinsing device according to an embodiment of the present application, and fig. 15 is a schematic structural view illustrating a slow release device in the tooth-rinsing device according to an embodiment of the present application. As shown in fig. 14, the tooth-rinsing device 10 provided in this embodiment further includes a slow release device 20, the slow release device 20 is located in the water storage cavity 5, the slow release device 20 is used for releasing functional substances into the water liquid in the water storage cavity 5, the functional substances may be a freshener, a probiotic, a surfactant, a fluoride, strontium chloride and other substances, and the functional substances may be mixed with the water liquid to form a functional liquid with functions of refreshing breath, sterilizing and disinfecting. Taking the flushing device as an example of a tooth flushing device, before the water in the water storage cavity 5 is used for flushing teeth in the oral cavity, functional substances can be released to the water in the water storage cavity 5 through the slow release device 20 to form functional liquid, even if the water ejected by the tooth flushing device impacts a sensitive area of the oral cavity to cause gingival bleeding, at the moment, the functional liquid has the functions of refreshing breath, sterilizing, disinfecting and the like, so that the secondary damage of harmful components in the water to a bleeding area can be effectively prevented.

Specifically, as shown in fig. 15, the sustained release apparatus 20 includes a protective case 201, a sustained release member 202, and a filter member 203; the protective shell 201 is provided with a protective cavity 2012, and a liquid through hole 2011 communicated with the protective cavity 2012 is formed in the outer surface of the protective shell 201; the slow release member 202 is positioned in the protective cavity 2012, and the slow release member 202 is used for releasing the functional substance; the filter 203 is located between the slow release 202 and the inner side wall surface of the guard chamber 2012. It can be appreciated that the protective shell 201 is used for protecting and fixing the slow release member 202, and the protection cavity 2012 is communicated with the water storage cavity 5 through the liquid through hole 2011, so that the water in the water storage cavity 5 can enter the protection cavity 2012 to be mixed with the functional substance released by the slow release member 202; the filter 203 can filter the functional substances released by the slow release member 202 to avoid precipitation of agglomerated or large-particle functional substances and enter the inner cavity 213 of the spherical rotor pump 2.

The aperture of the liquid through hole 2011 may be larger than the aperture of the filter hole of the filter 203, so that the aperture of the liquid through hole 2011 is larger, so that the water in the water storage cavity 5 can be ensured to smoothly enter the protection cavity 2012 through the liquid through hole 2011, and meanwhile, functional substances can be prevented from being accumulated at the liquid through hole 2011 to cause the blocking of the liquid through hole 2011. The aperture of the liquid through hole 2011 can be selected according to actual requirements, and the application is not particularly limited.

Further, the aperture of the filter hole of the filter 203 is smaller than that of the filter screen, so that the aperture of the filter hole of the filter 203 is smaller, and the large-particle functional substance is prevented from precipitating out of the shell and entering the inner cavity 213 of the spherical rotor pump 2, and meanwhile, the aperture of the filter hole of the filter screen is larger, so that the functional liquid formed by mixing the functional substance and the water liquid can smoothly enter the inner cavity 213. The aperture of the filter hole of the filter mesh and the aperture of the filter hole of the filter 203 can be selected according to actual demands, and the present application is not particularly limited.

In order to provide a strong continuity of the water sprayed from the nozzle 4, in some embodiments, the pump housing 21, the driving rotor 22 and the driven rotor 23 enclose a plurality of variable-volume chambers 24 arranged at intervals along the circumferential direction of the driving rotor 22. In this way, the water sprayed from the nozzle can be ensured to have stronger continuity in the rotation process of the driving rotor 22, and the service performance of the tooth irrigator 10 provided by the embodiment is improved.

The present embodiment provides a dental irrigator 10 that is a hand-held or bench-type dental irrigator. The tooth-rinsing device 10 may be a hand-held tooth-rinsing device, and the water storage cavity 5 of the hand-held tooth-rinsing device is directly arranged with the holding part of the machine body 1, so that the carrying is convenient, and the use condition of the tooth-rinsing device 10 is increased. Or the tooth-rinsing device 10 can be a desk-type tooth-rinsing device, and compared with a hand-held tooth-rinsing device, the water storage cavity 5 of the desk-type tooth-rinsing device is arranged separately from the holding part of the machine body 1, and when the holding gesture is adjusted, the water storage cavity 5 can not follow the inclination, and the holding part has relatively smaller volume, so that the tooth-rinsing gesture can be conveniently held and adjusted. In particular, it can be selected by a person skilled in the art as desired.

Further, the plurality of variable-volume chambers 24 are uniformly arranged in the circumferential direction of the active rotor 22. In this way, the continuity of the nozzle spray can be further improved, improving the usability of the dental irrigator 10 provided by the embodiments.

The tooth flushing device provided by the embodiment comprises a nozzle, a shell and a machine core, wherein a containing cavity and a water storage cavity are formed in the shell, the machine core comprises a spherical rotor pump arranged in the containing cavity, and the nozzle is connected with the machine core; the spherical rotor pump comprises a pump shell, a driving rotor and a driven rotor, wherein a water inlet and a water outlet are formed in the pump shell, the driving rotor and the driven rotor are both arranged in an inner cavity of the pump shell and are rotationally connected with the pump shell, a volume-variable cavity is formed by encircling the pump shell, the driving rotor and the driven rotor, the position of the volume-variable cavity is changed in the circumferential direction in the process that the driving rotor drives the driven rotor to rotate together, the volume of the volume-variable cavity is periodically changed, the volume of the volume-variable cavity is increased when the volume-variable cavity is communicated with the water inlet, and the volume of the volume-variable cavity is reduced when the volume-variable cavity is communicated with the water outlet; wherein, in the operation process of the active rotor, the water inlet is always communicated with the water storage cavity, and the water outlet is always communicated with the nozzle. In this way, through the rotation of the driving rotor and the driven rotor together, the communication between the volume-variable cavity and the water inlet and the communication between the volume-variable cavity and the water outlet can be realized, the water inlet is always communicated with the water storage cavity, and the water outlet is always communicated with the nozzle. In addition, the problem that the service life of the tooth washer is influenced due to failure caused by deformation of the one-way valve can be avoided due to the fact that the one-way valve is not arranged; in addition, the number of parts can be reduced without the arrangement of the one-way valve, and the assembly efficiency of the tooth-flushing device is improved; furthermore, without the arrangement of the one-way valve, the use of the tooth irrigator is not affected by the use of the one-way valve.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The tooth flushing device (10) is characterized by comprising a nozzle (4), a shell and a machine core, wherein a containing cavity and a water storage cavity (5) are formed in the shell, the machine core comprises a spherical rotor pump (2) arranged in the containing cavity, and the nozzle (4) is connected with the machine core;

the spherical rotor pump (2) comprises a pump shell (21), a driving rotor (22) and a driven rotor (23), wherein a water inlet (211) and a water outlet (212) are formed in the pump shell (21), the driving rotor (22) and the driven rotor (23) are both arranged in an inner cavity (213) of the pump shell (21) and are rotationally connected with the pump shell (21), the driving rotor (22) and the driven rotor (23) are enclosed to form a variable cavity (24), the position of the variable cavity (24) is changed in the circumferential direction in the process that the driving rotor (22) drives the driven rotor (23) to rotate together, the volume of the variable cavity (24) is changed periodically, the volume of the variable cavity (24) is increased when the variable cavity is communicated with the water inlet (211), and the volume of the variable cavity is decreased when the variable cavity is communicated with the water outlet (212).

In the running process of the driving rotor (22), the water inlet (211) is always communicated with the water storage cavity (5), and the water outlet (212) is always communicated with the nozzle.

2. The dental rinse (10) of claim 1 wherein the pump housing (21) comprises a pump housing body and two rotational parts (219) attached to the pump housing body, the two rotational parts (219) being oppositely disposed;

the driving rotor (22) comprises a first rotor body (221) and a first rotor shaft (222) which are connected together, the first rotor body (221) is in rotating fit with the pump shell body, and the first rotor shaft (222) is in rotating fit with one of the two rotating parts (219);

the driven rotor (23) comprises a second rotor body (231) and a second rotor shaft (232) which are connected together, the second rotor body (231) is movably connected with the first rotor body (221), the second rotor body (231) is in rotating fit with the pump shell body, and the second rotor shaft (232) is in rotating fit with the other of the two rotating parts (219);

wherein an angle is formed between the axial direction of the first rotor shaft (222) and the axial direction of the second rotor shaft (232).

3. The dental rinse (10) of claim 1 wherein the distance of the spherical rotor pump (2) from the top end of the housing is greater than the distance of the spherical rotor pump (2) from the bottom end of the housing in the direction of extension of the housing, the top end being located above the bottom end in the direction of gravity.

4. Tooth-rinsing device (10) according to claim 1, characterized in that the holding cavity is separated from the water storage cavity (5) by a first partition board, a water drawing pipe (8) is arranged on the first partition board, the water drawing pipe (8) stretches into the water storage cavity (5), the water drawing pipe (8) is communicated with the spherical rotor pump (2), and the distance between the free end of the water drawing pipe (8) and the bottom of the water storage cavity (5) is between 0.5mm and 5 mm.

5. The dental rinse (10) of claim 4 wherein the distance between the bottom of the first partition and the bottom of the water storage chamber (5) is 30mm or less.

6. The dental irrigator (10) of claim 4, wherein the axis of the water scooping pipe (8) is parallel to the height direction of the dental irrigator (10).

7. The dental irrigator (10) of claim 1, wherein the spherical rotor pump (2) is spaced from the inner wall of the receiving cavity along the circumference of the dental irrigator (10).

8. The dental rinse (10) of claim 1 wherein the water outlet (212) is located above the pump housing (21); or, the water outlet (212) is extended along the horizontal direction of the pump shell (21).

9. The dental irrigator (10) of claim 2 wherein one of said rotating portions (219) has a through hole (215) thereon that mates with said first rotor shaft (222);

the spherical rotor pump (2) further comprises a motor, wherein the motor is arranged in the accommodating cavity, and a driving shaft of the motor is directly connected with the first rotor shaft (222);

the motor is used for driving the driving rotor (22) to drive the driven rotor (23) to rotate together.

10. The dental irrigator (10) of claim 9 wherein the drive shaft outside the ball rotor pump is not lower than the through hole (215) at any location in the direction of the through hole (215) to the motor.

11. The dental irrigator (10) of claim 9 wherein the electrical connection wires of the motor are located on a side of the motor facing away from the through hole (215).

12. The dental rinse (10) of claim 9 wherein the through hole (215) is located below the motor.

13. The tooth punch (10) as claimed in claim 9, wherein said movement further includes a water deflector connected to said drive shaft and located on a side of said through hole (215) facing said motor.

14. The dental rinse (10) of claim 2 wherein the first rotor body (221) includes an inner support portion and an outer cover portion surrounding an outer periphery of the inner support portion, the inner support portion being connected to the first rotor shaft (222), the inner support portion being made of a metallic material.

15. The dental rinse (10) of claim 14 wherein the first rotor shaft (222) is of unitary construction with the inner support section and/or the outer cover section is of a plastics material.

16. The dental rinse (10) of claim 14 wherein the distance between the center of the inner support and the outer periphery of the inner support is greater than the inner periphery to outer periphery distance of the outer cover.

17. The dental rinse (10) of claim 14 wherein the outer cover has a distance from the inner periphery to the outer periphery of greater than 1.5mm.

18. The dental rinse (10) of claim 2 wherein the first rotor body (221) and the second rotor body (231) form a spherical swivel;

The driving rotor (22) further comprises a pin shaft portion (223), the pin shaft portion (223) and the first rotor shaft (222) are connected to opposite ends of the first rotor body (221); the second rotor body (231) is provided with a matching cavity (233) which is in rotating fit with the pin shaft part (223);

the pin end surfaces at both ends of the pin portion (223) comprise first planes (2231), and the planes of the first planes (2231) intersect with the axial direction of the pin portion (223).

19. The dental rinse (10) of claim 18 wherein the first plane (2231) is circular in shape.

20. The dental rinse (10) of claim 18 wherein the first flat surface (2231) has a diameter R1 and the pin shaft portion has a diameter R2,alternatively, the diameter of the pin portion (223) is R2, and the diameter of the ball of the spherical rotator is R3, < >>Alternatively, the length of the pin portion (223) is L, and the ball diameter of the spherical rotator is R3, < >>Or the diameter of the ball of the spherical rotating body is R3, R3 is more than or equal to 10 mm and less than or equal to 18 mm; alternatively, the ball diameter of the ball rotator is greater than 6 mm.

21. The tooth punch (10) as claimed in claim 18, wherein the pin portion (223) has a diameter greater than 2mm.

22. The tooth punch (10) of claim 1, wherein the active rotor (22) is a plastic rotor or a metal rotor; and/or the number of the groups of groups,

the driven rotor (23) is a plastic rotor or a metal rotor.

23. The dental rinse (10) of claim 2 wherein the pump housing (21) includes oppositely disposed first (216) and second (217) housings, the first housing (216) and the second housing (217) enclosing the interior cavity (213);

the driving rotor (22) further comprises a pin shaft part (223), and the second rotor body (231) is provided with a matching cavity (233) which is in rotating fit with the pin shaft part (223);

the first rotor body (221) comprises first matching surfaces (2232) positioned at two sides of the pin shaft part (223), a second matching surface (2311) is arranged at the side surface of the second rotor body (231) facing to one side of the first rotor body (221), and the matching cavity (233) is positioned at the second matching surface (2311) and extends along the axial direction of the pin shaft part (223) to penetrate two sides of the second rotor body (231);

wherein, the second mating surface (2311) is located at a portion of two sides of the mating cavity (233), and extends obliquely along a direction away from the mating cavity (233) and away from the first rotor body (221), and when the driven rotor (23) rotates until the second mating surface (2311) is opposite to the water inlet (211) or the water outlet (212), the second mating surface (2311) is located at a side of the water inlet (211) and the water outlet (212) close to the first housing (216), so that the water inlet (211) and the water outlet (212) are communicated with the variable-volume cavity (24).

24. The dental rinse (10) of claim 23 wherein the first mating surface (2232) is disposed at an angle to the second mating surface (2311) when the volume of the variable volume chamber (24) is minimized.

25. The dental rinse (10) of claim 23 wherein the first mating surface (2232) and the second mating surface (2311) are parallel to each other when the volume of the variable volume cavity is minimized.

26. The dental rinse (10) of claim 23 wherein the maximum spacing between the first mating surface (2232) and the second mating surface (2311) is d,0.5 mm +.d +.2 mm when the volume of the variable volume chamber (24) is minimal.

27. Tooth-rinsing device (10) according to claim 1, characterized in that the coefficient of thermal expansion of the driving rotor (22) is smaller than the coefficient of thermal expansion of the pump housing (21) and/or the coefficient of thermal expansion of the driven rotor (23) is smaller than the coefficient of thermal expansion of the pump housing (21).

28. The tooth punch (10) as claimed in claim 2, wherein said active rotor (22) further includes a pin shaft portion (223), said second rotor body (231) having a mating cavity (233) thereon for rotational mating with said pin shaft portion (223); the pump shell (21) comprises a first shell (216) and a second shell (217) which are oppositely arranged, and the first shell (216) and the second shell (217) are enclosed to form the inner cavity (213);

A clearance between the outer periphery of the first rotor body (221) on the side close to the pin shaft portion (223) and the inner wall surface of the first housing (216) is smaller than a clearance between the outer periphery of the first rotor body (221) on the side away from the pin shaft portion (223) and the inner wall surface of the first housing (216).

29. The dental rinse (10) of claim 1 wherein a first bumper is provided between the pump housing (21) and the inner wall of the receiving cavity; and/or the number of the groups of groups,

at least one of the driving rotor (22), the driven rotor (23) and the pump housing (21) contains carbon fibers.

30. The tooth punch (10) as claimed in claim 1, wherein a water inlet channel (2172) and a water outlet channel (2173) are formed on the pump housing (21), the water inlet channel (2172) communicates with the water storage chamber (5), the water outlet channel (2173) communicates with the nozzle (4), the water inlet (211) is formed at a water outlet end of the water inlet channel (2172), and the water outlet (212) is formed at a water inlet end of the water outlet channel (2173);

the water inlet end of the water inlet channel (2172) faces to the bottom of the water storage cavity (5) in the gravity direction; and/or the number of the groups of groups,

the water outlet end of the water outlet channel (2173) faces the nozzle (4).

31. The tooth punch (10) as claimed in claim 1, wherein said pump housing (21), said driving rotor (22) and said driven rotor (23) enclose a plurality of variable-volume chambers (24) arranged at intervals along a circumferential direction of said driving rotor (22).

32. The tooth punch (10) as claimed in claim 2, wherein the housing includes a body (1) and a water tank (3) connected together, the receiving cavity is formed in the body (1), and the water storage cavity (5) is formed by enclosing the body (1) and the water tank (3);

the spherical rotor pump (2) is arranged close to the water tank (3).

33. The tooth punch (10) as claimed in claim 32, wherein said spherical rotor pump (2) further comprises a motor, said motor being disposed within said housing cavity, and a drive shaft of said motor being connected to said active rotor (22);

the spherical rotor pump (2) and the motor are arranged along the horizontal direction of the machine body (1); or, the spherical rotor pump (2) and the motor are arranged along the vertical direction of the machine body (1).

34. The tooth punch (10) as claimed in claim 33, characterized in that the water tank (3) is slidably connected to the body (1) to vary the volume of the water storage chamber (5).

35. The dental rinse (10) of claim 34 wherein a water drain tube (8) is provided under the main body (1), the water drain tube (8) having a length L1, the water drain tube (8) being in communication with the ball rotor pump (2), the water tank (3) being slidably connected relative to the main body (1) between a first position and a second position;

the volume of the water storage cavity (5) is maximum at the first position, and the clear distance between the bottom wall of the water storage cavity (5) and the bottom end of the machine body (1) is L2, wherein L2-L1 is less than or equal to 5cm.

36. The tooth cleaning device (10) as claimed in claim 34, wherein the machine body (1) is provided with a water drawing pipe (8), the water drawing pipe (8) stretches into the water storage cavity (5), the water drawing pipe (8) is communicated with the spherical rotor pump (2), the length of the water drawing pipe (8) is L3, the spherical rotor pump (2) is connected with the machine body (1) through a communicating pipe, and the length of the communicating pipe is L4, and L3+L4 is less than or equal to 15cm.

37. The tooth punch (10) as claimed in claim 32, wherein said spherical rotor pump (2) further comprises a motor, said motor being disposed within said housing cavity, and a drive shaft of said motor being connected to said active rotor (22);

the driven rotor (23) comprises a second rotor body (231) and a second rotor shaft (232) which are connected together, the second rotor body (231) is movably connected with the first rotor body (221), and the second rotor body (231) is in running fit with the pump shell body;

The length extending direction of the driving shaft is the same as the length extending direction of the machine body (1), and the length extending direction of the second rotor shaft (232) and the length extending direction of the driving shaft form an included angle;

the outer contour of the pump housing (21) is located within the outer contour of the motor, projected in the axial direction of the drive shaft.

38. The dental rinse (10) of claim 37 wherein the second rotor shaft (232) has a length extension that is the same as the length extension of the main body (1), the length extension of the drive shaft being disposed at an angle to the length extension of the driven rotor (23);

along an axial projection of the second rotor shaft (232), the outer contour of the motor is located within the outer contour of the pump housing (21).

39. The dental rinse (10) of claim 32 wherein the active rotor (22) includes a first rotor body (221) and a first rotor shaft (222) connected together, the pump housing (21) having a throughbore (215) in rotational engagement with the first rotor shaft (222); the spherical rotor pump (2) further comprises a motor, wherein the motor is arranged in the accommodating cavity, and a driving shaft of the motor is directly connected with the first rotor shaft (222);

The tooth flushing device (10) further comprises a second partition board which is connected in the machine body (1) so as to divide the accommodating cavity into a first cavity and a second cavity;

the second partition plate is provided with a through hole communicated with the first cavity and the second cavity, the motor is located in the first cavity, the spherical rotor pump (2) is located in the second cavity, and the driving shaft penetrates through the through hole to penetrate through the through hole (215) and is connected with the spherical rotor pump (2).

40. The dental rinse (10) of any one of claims 1 to 39 wherein the dental rinse (10) is a hand-held or bench-top dental rinse.