CN209827054U

CN209827054U - Tooth flushing device

Info

Publication number: CN209827054U
Application number: CN201920041123.8U
Authority: CN
Inventors: 徐振武; 刘大磊
Original assignee: Shanghai Shift Electrics Co Ltd
Current assignee: Shanghai Shift Electrics Co Ltd
Priority date: 2019-01-10
Filing date: 2019-01-10
Publication date: 2019-12-24
Anticipated expiration: 2029-01-10

Abstract

The utility model relates to a tooth flushing device, include: the first pumping assembly is used for pumping a first working medium for tooth punching; the second pumping assembly is used for pumping a second working medium for tooth punching; a nozzle fluidly coupled to the output ends of the first and second pumping assemblies; and the first working medium for tooth punching and/or the second working medium for tooth punching are/is sprayed out through the nozzle.

Description

Tooth flushing device

Technical Field

The utility model relates to a personal care field especially relates to a towards tooth ware.

Background

The current tooth flushing device usually comprises a single-cylinder water pump, and the reciprocating inertia force of the single-cylinder water pump during working is unbalanced, so that the vibration is large, the user experience is poor due to the influence of vibration and noise in use, and the service life of the product is seriously influenced due to the influence of vibration. Meanwhile, because only one water pump is arranged, most of the structures can only spray water.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide a new tooth irrigator for solving the above problems.

According to the utility model discloses, a towards tooth ware is provided, include: the first pumping assembly is used for pumping a first working medium for tooth punching; the second pumping assembly is used for pumping a second working medium for tooth punching; a nozzle fluidly coupled to the output ends of the first and second pumping assemblies; and the first working medium for tooth punching and/or the second working medium for tooth punching are/is sprayed out through the nozzle.

In particular, the first pumping assembly and the second pumping assembly each comprise a positive displacement pump. More specifically, the displacement pump is a piston pump, a plunger pump, a gear pump, a slide plate pump or a diaphragm pump.

In one embodiment, the first pumping assembly and the second pumping assembly each comprise a piston pump. In particular, the first and second pumping assemblies comprise a drive assembly and a piston cylinder assembly, wherein the piston cylinder assembly is driven by the drive assembly. More specifically, the piston cylinder assembly comprises a cylinder body and a piston movably connected with the cylinder body. More specifically, the drive assembly includes a drive source and a transmission assembly. More specifically, the driving source includes a motor. More specifically, the transmission assembly includes a gear set including a driving gear connected to an output end of the motor and a driven gear engaged with the driving gear, and a connecting rod having one end connected to the driven gear and the other end transmitting the piston connected to the piston cylinder assembly. More specifically, the driven gear is a face gear.

In one embodiment, the first pumping assembly and the second pumping assembly are configured to be both operable simultaneously to eject the mixed first and second working fluids at the nozzle. The first working medium and the second working medium can be the same or different.

In another embodiment, the first pumping assembly and the second pumping assembly are configured to be alternately operable to both eject the mixed first and second working fluids at the nozzle. The first working medium and the second working medium can be the same or different.

In one example, the first working fluid and the second working fluid each comprise water.

In another example, the first working fluid comprises water and the second working fluid comprises air.

Preferably, the nozzle comprises a nozzle body and a housing, a first end of the nozzle body being in fluid communication with the output ends of the first and second pumping assemblies; an outlet defined in the housing, the housing connected to the second end of the nozzle body and defining with the nozzle body a receiving chamber in fluid communication with ambient air; the first working medium for tooth flushing and/or the second working medium for tooth flushing enter the containing cavity through the nozzle body, are mixed with the outside air and then are sprayed out through the outlet.

According to the utility model discloses, still provide a towards tooth ware, include: a base; a drive assembly secured to the base; a first piston cylinder assembly secured to the base and driven by the drive assembly for pumping a first working medium for flushing teeth; a second piston cylinder assembly secured to the base and driven by the drive assembly for pumping a second working medium for flushing the teeth; a nozzle fluidly coupled to the output ends of the first and second piston cylinder assemblies; and the first working medium for tooth punching and/or the second working medium for tooth punching are/is sprayed out through the nozzle.

Specifically, the first piston cylinder assembly comprises a first cylinder and a first piston movably connected with the first cylinder, and the second piston cylinder assembly comprises a second cylinder and a second piston movably connected with the second cylinder, and the first piston and the second piston are driven by the driving assembly. More specifically, the drive assembly includes a drive source including a motor and a transmission assembly including a drive gear connected to an output of the motor and first and second face gears respectively engaged with the drive gear, wherein the first piston is connected to the first face gear and the second piston is connected to the second face gear.

In particular, the first and second piston cylinder assemblies are configured such that their inter-cylinder angle is between 0-180 degrees.

Specifically, the die cutter further comprises a valve assembly disposed in fluid communication between the output ends of the first and second piston cylinder assemblies and the nozzle, wherein the valve assembly comprises a valve body within which a first working matter from the first piston cylinder assembly and a second working matter from the second piston cylinder assembly mix.

More specifically, the first working fluid and the second working fluid each comprise water. Preferably, the first and second piston cylinder assemblies are configured such that their inter-cylinder angles are between 120 and 180 degrees. Preferably, the first and second piston cylinder assemblies are arranged such that their inter-cylinder angle is 180 degrees.

More specifically, the first working medium comprises water and the second working medium comprises air. Preferably, the first and second piston cylinder assemblies are configured such that their inter-cylinder angle is between 0-60 degrees. Preferably, the first and second piston cylinder assemblies are configured such that their inter-cylinder angle is at 0 degrees.

Preferably, the nozzle comprises a nozzle body and a housing, a first end of the nozzle body being in fluid communication with the output ends of the first and second piston cylinder assemblies; an outlet defined in the housing, the housing connected to the second end of the nozzle body and defining with the nozzle body a receiving chamber in fluid communication with ambient air; the first working medium for tooth flushing and/or the second working medium for tooth flushing enter the containing cavity through the nozzle body, are mixed with the outside air and then are sprayed out through the outlet.

Preferably, the utility model also provides a tooth flushing device, include: a valve body; a bonnet connected to the valve body; a nozzle locking element non-rotatably received within the valve cap, the nozzle locking element including an annular body and a resilient catch extending inwardly from the body; a nozzle including an engagement end insertably engaged with the valve cap, the engagement end defining a non-closing groove in a circumferential direction, the non-closing groove being engaged with the catch to lock the nozzle to the valve cap in a first state, and disengaged from the catch to unlock when the nozzle is rotated to a second state. In particular, the clasp is made of plastic material. Specifically, the number of the buckles is two. Specifically, the tooth flushing device further comprises a nozzle positioning element accommodated in the valve cover, wherein the nozzle positioning element is in a sleeve shape, and a positioning end face extends inwards at one end far away from the nozzle, and the positioning end face positions the end face of the nozzle when the nozzle is inserted into the valve cover. According to this embodiment, when the engagement end of the nozzle is inserted into the valve cap, it is not necessary to correct the circumferential angular position of the engagement end, that is, directly inserted into the valve cap at an arbitrary circumferential angular position, the engagement end first touches the elastic catch during the insertion, but since the catch is elastic, when the insertion is continued by applying force, the catch is elastically deformed to open to allow the engagement end to continue to be inserted inwardly, when the end surface of the engagement end abuts against the positioning end surface of the nozzle positioning member, the nozzle is rotated, and when the groove of the engagement end is rotated to a position corresponding to the catch, the catch enters the groove by the elastic force, and thus, the nozzle is locked with the valve cap. Conversely, when it is desired to remove the spout from the valve cap, by turning the spout clockwise or counterclockwise, the catch will be opened by the non-recessed surface of the engagement end, and the spout can be removed by withdrawing it outwardly.

According to an embodiment of the present invention, the inter-cylinder angle of the first cylinder and the second cylinder can be configured at will, and further, the configured inter-cylinder angle can be related to the first working medium and the second working medium. In one example, when the first and second working fluids each comprise water, the inter-cylinder angle may be configured to be 180 degrees, which may allow for continuous pumping of water and may also substantially dampen vibrations that may occur when pumping water. In another example, when the first working fluid comprises water and the second working fluid comprises a gas, such as air, the inter-cylinder angle may be configured to be 0 degrees, such that the first working fluid and the second working fluid may be pumped out simultaneously and may mix in a manifold in the valve body, thereby ejecting the mixed working fluid, i.e. the air and water mixture, from the nozzle. Moreover, because the compressed air is entrained in the water, aeration and/or cavitation effects may occur when sprayed onto the surface to be cleaned, such as a tooth surface. In addition, vibration during operation is reduced. It can be understood that according to the utility model discloses, under the condition that has first pump to move the subassembly and the subassembly is moved to the second pump, this towards tooth ware at the during operation vibration diminishes, therefore life can be longer.

According to an embodiment of the present invention, it is understood that the above described embodiments may each eject a tooth-flushing fluid mixed with air, when considering the technical features of the housing of the nozzle in communication with the gas containing chamber. By configuring the receiving chamber to be in communication with a gas, the flushing fluid is mixed with the gas (e.g., air) or the flushing fluid is entrained with the gas when the flushing fluid is injected, such that the gas-liquid mixture cavitates under pressure changes at the surface to be cleaned, such as a tooth surface, to enhance the cleaning effect. For example, when teeth are cleaned, oxygen in the carried air enters the closed space, which is beneficial to killing anaerobic bacteria between teeth gaps, keeping oxygen supply between teeth and keeping healthy teeth.

Drawings

FIG. 1 is a view of a dental irrigator according to one embodiment of the present invention;

FIG. 2 is an exploded view of the pumping assembly of the dental irrigator according to the embodiment of the present invention shown in FIG. 1;

FIG. 3 is an exploded view of the valve assembly of the dental irrigator according to the embodiment of the invention shown in FIG. 1, positioned above FIG. 2 in the assembly orientation and assembled with the pumping assembly;

FIG. 4 is an exploded view of the nozzle of the dental irrigator according to the embodiment of the invention shown in FIG. 1, positioned above FIG. 3 in the assembly orientation and assembled with the valve assembly;

fig. 5 is a perspective view of the valve body of the embodiment shown in fig. 3 according to the present invention; and

fig. 6 is a perspective view of a nozzle locking element in a valve seat according to the embodiment of the invention shown in fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

FIG. 1 is a view of a dental irrigator according to one embodiment of the present invention; FIG. 2 is an exploded view of the pumping assembly of the dental irrigator according to the embodiment of the present invention shown in FIG. 1; FIG. 3 is an exploded view of the valve assembly of the water toothpick according to the embodiment of the present invention shown in FIG. 1; fig. 4 is an exploded view of a nozzle of the dental irrigator according to the embodiment of the present invention shown in fig. 1. Because of the long construction of the dental irrigator 100, it is understood that it is shown herein generally as a pump assembly in FIG. 2, a valve assembly in FIG. 3 and a nozzle in FIG. 4, respectively, assembled in sequence. Referring to fig. 1 to 4, the dental irrigator 100 includes a first pumping assembly 200, a second pumping assembly 300 and a nozzle 400. In particular, the first and second pumping assemblies 200 and 300 may each comprise a positive displacement pump, which may be, for example, a piston pump, a plunger pump, a gear pump, a slide plate pump, a diaphragm pump, or the like. In one example, the first pumping assembly 200 may be in the form of a piston pump and the second pumping assembly 300 may be in the form of a diaphragm pump; in another example, the first pumping assembly 200 may be in the form of a gear pump and the second pumping assembly 300 may be in the form of a plunger pump; in yet another example, the first pumping assembly 200 may be in the form of a plunger pump and the second pumping assembly 300 may be in the form of a slide plate pump. From these examples, it should be easily understood by those skilled in the art that which form of the displacement pump the first pumping assembly 200 and the second pumping assembly 300 take may be selected according to the use condition, and the present invention does not limit the specific form of the displacement pump. In the following description, for exemplary purposes, the first pumping assembly 200 is in the form of (or includes) a piston pump, and the second pumping assembly 300 is in the form of (or includes) a piston pump.

The first pumping assembly 200 comprises a first driving assembly comprising a driving source and a first transmission assembly 202, and a first piston cylinder assembly comprising a first cylinder 204 and a first piston 206 movably connected to the first cylinder 204.

The second pumping assembly 300 includes a driving assembly including a driving source and a second transmission assembly 302, and a second piston cylinder assembly including a second cylinder 304 and a second piston 306 movably connected to the second cylinder 304.

In the embodiment according to the present invention, the driving source of the second driving assembly and the driving source of the first driving assembly are a common motor M.

The first transmission assembly 202 includes a gear set including a driving gear G1 connected to the output of the motor M and a driven gear G2 engaged with the driving gear G1, and a connecting rod 208, wherein the driven gear G2 is a first face gear, one end of the connecting rod 208 is connected to the first face gear G2, and the other end thereof is drivingly connected to the first piston 206 of the first piston cylinder assembly.

The second transmission assembly 302 comprises a gear set and a connecting rod 308, wherein the gear set comprises a driving gear G1 shared by the first transmission assembly and a driven gear G3 engaged with the driving gear G1, wherein the driven gear G3 is a second end face gear, one end of the connecting rod 308 is connected to the second end face gear G3, and the other end is in transmission connection with the second piston 306 of the second piston cylinder assembly.

More specifically, in the present embodiment according to the present invention, each element from the driven gear G2 to the first cylinder 204 is substantially the same as each element from the driven gear G3 to the second cylinder 304. Further, it is preferable that the gear ratio between the driven gear G2 and the driving gear G1 is also the same as the gear ratio between the driven gear G3 and the driving gear G1. It will be appreciated that the gear ratio between the driven gear G2 and the drive gear G1 and the gear ratio of the driven gear G3 and the drive gear G1 may be configured such that the output is decelerated and, therefore, the radius of the driven gears G2, G3 is greater than the radius of the drive gear G1; on the other hand, the driven gear G2 and the driven gear G3 have the same shape so that the gear ratio is the same.

According to the present embodiment, the connecting rod 208 and the connecting rod 308 are substantially the same, wherein the first end of the connecting rod 208 is rotatably sleeved on the eccentric output shaft of the outer end face of the first face gear G2, and the second end of the connecting rod 208 is hinged to the first piston 206. A first end of the connecting rod 308 is rotatably sleeved on an eccentric output shaft of the outer end face of the second end face gear G3, and a second end of the connecting rod 308 is hinged to the second piston 306.

Next, the first pumping assembly 200 and the second pumping assembly 300 will be described from the perspective of assembly.

According to the present embodiment of the present invention, the tooth rinsing device further comprises a base 500, and the first pumping assembly 200 and the second pumping assembly 300 are both fixedly mounted on the base 500. Specifically, as shown, the base 500 includes a bottom wall 502, a side wall 504 extending vertically upward from the bottom wall 502, and a top wall 506 extending horizontally inward from the side wall 504, wherein the bottom wall 502, the side wall 504, and the top wall 506 define a mounting cavity therein. The motor M is fixed to the bottom wall 502, and an output shaft of the motor M passes through the bottom wall 502 in the vertical direction into the mounting cavity; the drive gear G1 is fixed to the output shaft of the motor M. A horizontal pin shaft passes through the aforementioned first face gear G2 and second face gear G3 and is fixed to the side wall 504 of the base 500. The first face gear G2 and the second face gear G3, which are fixed by pins, are arranged on both sides of the drive gear G1 with their tooth surfaces facing each other and each meshing with the drive gear G1. One or more gear washers may be disposed on the pin between the first face gear G2 and the second face gear G3, respectively, to adjust the distance therebetween to fit the drive gear G1. The first cylinder 204 and the second cylinder 304 are positioned in the receiving cavity of the base 500 with their cylinder sides respectively engaging the recessed portions formed by the side walls 504 of the base 500, and the first cylinder 204 and the second cylinder 304 are also fixed to the top wall 506 of the base 500 in the vertical direction, as will be described in detail later. In this way, the movable range of the connecting rod 208 and the first piston 206 arranged between the first face gear G2 and the first cylinder 204 is also defined, and likewise, the movable range of the connecting rod 308 and the second piston 306 arranged between the second face gear G3 and the second cylinder 304 is also defined.

It will be appreciated that each of the first cylinder 204 and the second cylinder 304 described herein may be designed using conventional cylinder configurations. Here, as shown in the drawings, in the present embodiment according to the present invention, each cylinder 204, 304 is provided with a fluid outflow port in the vertical direction, and a fluid inlet port is provided on a side wall of each cylinder 204, 304, to which a fluid line may be directly connected. It will be appreciated that the fluid line communicating with the fluid inlet of each cylinder 204, 304 may lead to a fluid source, such as a container containing fluid, which may be a kettle, for example, if the fluid is water. If the fluid is air, the fluid conduit may be directly connected to the outside atmosphere. The fluid inlet and the pipeline connected to the fluid inlet are not important for the present invention and can be easily known by those skilled in the art based on the disclosure of the present specification, and therefore, the detailed description thereof is omitted.

Additional structure in fluid communication with the first pumping assembly 200 and the second pumping assembly 300 is further described below.

The nozzle 400 is in fluid communication with the output ends of the first and second pumping assemblies 200 and 300.

According to the present embodiment of the present invention, the dental irrigator 100 further comprises a valve assembly 600 arranged in fluid communication between the output of the first and second piston cylinder assemblies and the nozzle 400. Specifically, the valve assembly 600 includes a valve body 602 and a bonnet 603. The valve body 602 includes two connectors 604, 606 extending downward from the valve body and a junction 607 in fluid communication with both connectors 604, 606, the structural details of which can be seen in fig. 5, wherein fig. 5 is a perspective view of the valve body according to the embodiment shown in fig. 3 of the present invention. It is understood that sealing elements, check elements, etc. may also be provided at the connection of the joints 604, 606 of the valve body 602 with the first cylinder 204 and the second cylinder 304. The sealing element can be an O-ring seal and the non-return element can be a diaphragm. Fitting 604 may be engaged with and in fluid communication with the aforementioned fluid flow outlet of first cylinder 204, and likewise fitting 606 may be engaged with and in fluid communication with the aforementioned fluid flow outlet of second cylinder 304. The fluid flowing from the first cylinder 204 and the second cylinder 304 may, in turn, merge within the merging port 607. Further, the valve body 602 also defines an annular groove for sealing with a seal member on the upper end face of the valve body and on the circumferential outside of the confluence port 607.

According to the present embodiment of the invention, the valve cover 603 is adaptable to the valve body 602 on the one hand, and on the other hand, the valve cover 603 is also used to clamp or secure the nozzle 400. In particular, the valve cover 603 defines a cavity 605, and the cavity 605 may receive a nozzle positioning element 608 and a nozzle locking element 610 therein, wherein the nozzle locking element 610 may be disposed downstream of the nozzle positioning element 608. In other embodiments, the nozzle locking element 610 may also be disposed upstream of the nozzle positioning element 608 if the configuration of the nozzle permits. Sealing elements, such as O-rings and/or gaskets, are also disposed between the nozzle positioning element 608 and the nozzle locking element 610. The nozzle positioning element 608, the nozzle locking element 610 and the sealing element therebetween are generally clearance fit with the inner wall of the cavity defined between the valve cap 603 and the valve body 602. More specifically, the nozzle positioning element 608 is a positioning sleeve having an inner surface that is generally adapted to the outer surface of the mating end of the nozzle 400, the positioning sleeve having a positioning end surface extending inwardly away from the end (distal end) of the nozzle 400 such that, upon insertion of the nozzle 400, the nozzle 400 is retained by the positioning end surface upon reaching the distal opening and cannot be inserted any further. Referring to fig. 6, fig. 6 is a perspective view of an in-seat nozzle locking element 610 according to the embodiment of the present invention shown in fig. 3. The nozzle locking element 610 may be made of a non-rigid material, for example a plastic material, such as plastic, further, such as a POM material. The nozzle locking member 610 includes an annular body 612, and a positioning surface 614 is further provided on a portion of the circumferential outer surface of the annular body 610, and as in the present embodiment, the positioning surface 614 is flat unlike the arc shape of the other portion, and the flat positioning surface 614 is formed by, for example, cutting off a portion of the material or is integrally formed from the beginning. Accordingly, within the cavity 605 of the valve cap 603, a surface is also provided that mates with the locating surface such that the annular body 612 is confined therein. The annular body 612 defines a hollow portion therein, and at least one resilient catch 616 also extends inwardly from the annular body 612, the extent to which the resilient catch 616 extends inwardly being configured to resiliently engage a surface of the engagement end of the nozzle 400.

Next, the assembly of the lower valve body 602, the cap 603, and the base 500 will be described from the assembly point of view.

The fluid flow outlets of the first cylinder 204 and the second cylinder 304 are connected to two connections 604, 606 of the valve body 602, respectively; the nozzle positioning element 608, the nozzle locking element 610, and the sealing element are placed into the cavity 605 of the valve cap 603; fasteners, such as four screws b, pass through the through-holes of the valve cover 603 and the valve body 602 in that order and secure the valve cover 603 and the valve body 602 to the top wall 506 of the base 500. In this way, not only the valve body 602 and the valve cover 603 are sealingly fixed to each other, but also the first cylinder block 204 and the second cylinder block 304 are limited in the vertical direction as shown in the drawing.

With reference to fig. 4, the valve nozzle 400 includes a nozzle body 402, an engagement end 4022 of the nozzle body 402 is designed in length to protrude into the valve cover 603 and an end surface of the engagement end 4022 may abut against a positioning end surface of a nozzle positioning element 608, and the engagement end 4022 of the nozzle body 402 is designed in a circumferential direction to be capable of being engaged with the nozzle positioning element 608 and a nozzle locking element 610 in the valve cover 603. Specifically, at least one non-closed segment of annular groove 4024 is circumferentially disposed at a suitable location on the engagement end 4022 of the nozzle body 402, the groove 4024 being engageable with the previously described nozzle locking element 610, in accordance with both of the design requirements previously described.

Specifically, when the engagement end 4022 of the nozzle body 402 is inserted into the valve cover 603, it is not necessary to correct the circumferential angular position of the engagement end 4022, that is, to insert it directly into the valve cover 603 at any circumferential angular position, and during the insertion, the engagement end 4022 first encounters the elastic catch 616, and since the catch 616 is elastic, when the insertion is continued by applying force, the catch elastically deforms to open to allow the engagement end 4022 to continue to be inserted inwardly, when the end surface of the engagement end 4022 abuts against the positioning end surface of the nozzle positioning element 608, the nozzle body 402 is rotated, and when the groove 4024 of the engagement end 4022 is rotated to a position corresponding to the catch 616, the catch 616 enters the groove 4024 by the elastic force, and thus the nozzle body 402 and the valve cover 603 are locked together. Conversely, when it is desired to remove the nozzle body 402 from the valve cap 603, by rotating the nozzle body 402 clockwise or counterclockwise, the tabs 616 are opened by the non-recessed surfaces of the engagement ends 4022, and the nozzle body 402 is removed by pulling outward.

As shown, the nozzle 400 further includes a housing 404 defining an outlet 406, the housing 404 coupled to a second end of the nozzle body 402 and defining a receiving chamber in communication with the nozzle body 402. The fluid enters the containing cavity through the valve body 602, the valve cover 603 and the nozzle body 402, and because the fluid has a certain speed under the pumping action of the pumping assembly to form a jet flow, and the jet flow forms a negative pressure in the containing cavity, the external air flows into the containing cavity under the action of the negative pressure, and is mixed with the gas and then is ejected through the outlet 406. It will be appreciated that the chamber may be in gaseous communication by providing a vent in the housing 404 in addition to the outlet 406 to vent the atmosphere. It will also be appreciated that the chamber may be in communication with the atmosphere by providing a vent hole in the nozzle body 402 to vent the atmosphere.

According to an embodiment of the present invention, in the first pumping assembly 200 and the second pumping assembly 300, the cylinder angle between the first cylinder block 204 and the second cylinder block 304 may be arbitrarily set between 0 to 180 degrees.

According to an embodiment of the present invention, in the first pumping assembly 200 and the second pumping assembly 300, the fluid inlet of each cylinder 204, 304 can be respectively introduced into the first working medium for flushing teeth and the second working medium for flushing teeth, wherein the first working medium and the second working medium can be the same or different. For example, in one example, the first and second working fluids may each comprise water, and in one example, the first working fluid may comprise water and the second working fluid may comprise a gas, such as air.

According to an embodiment of the present invention, the inter-cylinder angle of the first cylinder block 204 and the second cylinder block 304 may be configured such that it is related to the first working fluid and the second working fluid. In one example, when the first and second working fluids both include water, the inter-cylinder angle may be configured to be between 120 and 180 degrees, and preferably, the inter-cylinder angle may be configured to be 180 degrees, such that the second cylinder 304 may begin pumping water to the valve body 602 when the first cylinder 204 substantially completes pumping water to the valve body 602, i.e., alternately pumping water to the valve body 602, thereby enabling continuous pumping of water, and the simultaneous operation of the two cylinders 204, 304 may also substantially reduce vibration generated when pumping water. In another example, when the first working fluid comprises water and the second working fluid comprises a gas, such as air, the inter-cylinder angle may be configured between 0-60 degrees, preferably the inter-cylinder angle may be configured to be 0 degrees, such that the first working fluid and the second working fluid may be pumped simultaneously and may mix within the confluence port 607 in the valve body 602, thereby ejecting the mixed working fluid, i.e., air and water mixture, from the nozzle 400. Moreover, because the compressed air is entrained in the water, aeration and/or cavitation effects may occur when sprayed onto the surface to be cleaned, such as a tooth surface. In addition, vibration during operation is reduced. Those skilled in the art can adjust the inter-cylinder angle of the first cylinder block 204 and the second cylinder block 304 as desired to achieve their specific purpose according to these two illustrative examples, and the above illustrative embodiments are not intended to limit the inter-cylinder angle. It can be understood that, according to the present invention, in the presence of the first pumping assembly 200 and the second pumping assembly 300, the dental irrigator 100 vibrates less during operation, and thus the service life thereof can be longer.

According to an embodiment of the present invention, it is understood that the above-described embodiments may each eject a tooth-rinsing fluid mixed with air when considering the technical features of the housing 404 of the nozzle 400 in communication with the gas containing chamber. By configuring the receiving chamber to be in communication with a gas, the flushing fluid is mixed with the gas (e.g., air) or the flushing fluid is entrained with the gas when the flushing fluid is injected, such that the gas-liquid mixture cavitates under pressure changes at the surface to be cleaned, such as a tooth surface, to enhance the cleaning effect. For example, when teeth are cleaned, oxygen in the carried air enters the closed space, which is beneficial to killing anaerobic bacteria between teeth gaps, keeping oxygen supply between teeth and keeping healthy teeth.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A dental irrigator, comprising:

the first pumping assembly is used for pumping a first working medium for tooth punching;

the second pumping assembly is used for pumping a second working medium for tooth punching;

a nozzle fluidly coupled to the output ends of the first and second pumping assemblies;

and the first working medium for tooth punching and/or the second working medium for tooth punching are/is sprayed out through the nozzle.

2. The dental irrigator of claim 1 wherein each of the first and second pumping assemblies comprises a positive displacement pump.

3. The dental irrigator of claim 2 wherein said positive displacement pump is a piston pump, a plunger pump, a gear pump, a slide plate pump or a diaphragm pump.

4. The dental irrigator of claim 1 wherein each of the first and second pumping assemblies comprises a piston pump.

5. The dental irrigator of claim 4 wherein the first and second pumping assemblies comprise a drive assembly and a piston cylinder assembly, wherein the piston cylinder assembly is driven by the drive assembly.

6. The dental irrigator of claim 5 wherein said piston cylinder assembly comprises a cylinder and a piston movably connected to said cylinder.

7. The dental irrigator of claim 6 wherein the drive assembly includes a drive source and a transmission assembly.

8. The dental irrigator of claim 7 wherein the drive source comprises a motor.

9. The dental irrigator of claim 8 wherein the drive assembly includes a gear train and a connecting rod, wherein the gear train includes a drive gear connected to the output of the motor and a driven gear in meshing engagement with the drive gear, and wherein the connecting rod has one end connected to the driven gear and the other end driving the piston connected to the piston cylinder assembly.

10. The dental irrigator of claim 9 wherein said driven gear is a face gear.

11. The dental irrigator of claim 1 wherein the first and second pumping assemblies are configured to be both operable simultaneously to eject the mixed first and second working fluids at the nozzle.

12. The dental irrigator of claim 1 wherein the first and second pumping assemblies are configured to be alternately operable to both spray mixed first and second working fluids at the nozzle.

13. The dental irrigator of claim 11 or claim 12 wherein the first and second working fluids each comprise water.

14. The dental irrigator of claim 11 or claim 12 wherein said first working fluid comprises water and said second working fluid comprises air.

15. The dental irrigator of claim 1 wherein said nozzle includes a nozzle body and a housing, a first end of said nozzle body being in fluid communication with the output ends of said first and second pumping assemblies;

an outlet defined in the housing, the housing connected to the second end of the nozzle body and defining with the nozzle body a receiving chamber in fluid communication with ambient air;

the first working medium for tooth flushing and/or the second working medium for tooth flushing enter the containing cavity through the nozzle body, are mixed with the outside air and then are sprayed out through the outlet.

16. A dental irrigator, comprising:

a base;

a drive assembly secured to the base;

a first piston cylinder assembly secured to the base and driven by the drive assembly for pumping a first working medium for flushing teeth;

a second piston cylinder assembly secured to the base and driven by the drive assembly for pumping a second working medium for flushing the teeth;

a nozzle fluidly coupled to the output ends of the first and second piston cylinder assemblies;

17. The dental irrigator of claim 16 wherein the first piston cylinder assembly includes a first cylinder and a first piston movably connected to the first cylinder and the second piston cylinder assembly includes a second cylinder and a second piston movably connected to the second cylinder, the first piston and the second piston being driven by the drive assembly.

18. The dental irrigator of claim 17 wherein the drive assembly includes a drive source including a motor and a transmission assembly including a drive gear connected to an output of the motor and first and second face gears respectively engaged with the drive gear, wherein the first piston is connected to the first face gear and the second piston is connected to the second face gear.

19. The dental irrigator of claim 16 wherein the first and second piston cylinder assemblies are configured so that their inter-cylinder angles are between 0-180 degrees.

20. The dental irrigator of claim 16 further comprising a valve assembly disposed in fluid communication between the output ends of the first and second piston cylinder assemblies and the nozzle, wherein the valve assembly includes a valve body within which the first working fluid from the first piston cylinder assembly and the second working fluid from the second piston cylinder assembly mix.

21. The dental irrigator of claim 20 wherein said first working fluid and said second working fluid each comprise water.

22. The dental irrigator of claim 21 wherein said first piston cylinder assembly and said second piston cylinder assembly are configured so that their inter-cylinder angles are at 120-180 degrees.

23. The dental irrigator of claim 21 wherein the first and second piston cylinder assemblies are configured so that their inter-cylinder angles are 180 degrees.

24. The dental irrigator of claim 20 wherein said first working fluid comprises water and said second working fluid comprises air.

25. The dental irrigator of claim 24 wherein the first and second piston cylinder assemblies are configured so that their inter-cylinder angles are between 0 and 60 degrees.

26. The dental irrigator of claim 24 wherein the first and second piston cylinder assemblies are configured so that their inter-cylinder angle is at 0 degrees.

27. The dental irrigator of claim 16 wherein the nozzle includes a nozzle body and a housing, a first end of the nozzle body being in fluid communication with output ends of the first and second piston cylinder assemblies;

28. A dental irrigator, comprising:

a valve body;

a bonnet connected to the valve body;

a nozzle locking element non-rotatably received within the valve cap, the nozzle locking element including an annular body and a resilient catch extending inwardly from the body;

a nozzle including an engagement end insertably engaged with the valve cap, the engagement end defining a non-closing groove in a circumferential direction, the non-closing groove being engaged with the catch to lock the nozzle to the valve cap in a first state, and disengaged from the catch to unlock when the nozzle is rotated to a second state.

29. The dental irrigator of claim 28 wherein said clip is of plastic material.

30. The dental irrigator of claim 28 wherein the number of said catches is two.

31. The dental irrigator of claim 28 further comprising a nozzle positioning member received in said valve cap and having a sleeve-like shape with a positioning end surface extending inwardly at an end remote from said nozzle, said positioning end surface positioning an end surface of said nozzle when said nozzle is inserted into said valve cap.