CN215192472U

CN215192472U - Liquid spraying device and tooth flushing device

Info

Publication number: CN215192472U
Application number: CN202120652933.4U
Authority: CN
Inventors: 刘崇展; 汤良付; 杨小云
Original assignee: Shenzhen Zhaowei Machinery and Electronics Co Ltd
Current assignee: Shenzhen Zhaowei Machinery and Electronics Co Ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-12-17
Anticipated expiration: 2031-03-29

Abstract

The application discloses hydrojet device and towards tooth ware relates to mechanical transmission technical field. This hydrojet device includes the casing, and sets up drive assembly, piston assembly and the pump body in the casing, the pump body is including connecting in the first check valve group, the second check valve group and the piston cylinder of die cavity, wherein, piston cylinder and piston assembly's piston sliding connection, first check valve group be used for with the inlet of the pump body is connected, the second check valve group be used for with the liquid outlet of the pump body is connected, drive assembly with the piston assembly transmission is connected, so that the piston is in reciprocating motion in the piston cylinder. The setting form can be simplified, the occupied space is reduced, and the portability is improved.

Description

Liquid spraying device and tooth flushing device

Technical Field

The application relates to the technical field of mechanical transmission, in particular to a liquid spraying device and a tooth flushing device.

Background

With the increasing emphasis on oral hygiene, there is an increasing interest in oral cleaning and care. The tooth-rinsing device is used as an oral cavity cleaning device, can realize oral cavity cleaning by utilizing impact force of jetting high-speed water columns under certain pressure, is more and more favored by people, and slowly becomes a necessary article for many families.

The existing tooth flushing device mainly comprises a table type and a portable type, and the existing portable tooth flushing device is complex in transmission, large in occupied space and poor in portability.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a hydrojet device and towards tooth ware, can simplify the setting form, reduce occupation space, and then promote the portability.

The embodiment of the application is realized as follows:

an aspect of the embodiment of the application provides a liquid spray device, including the casing, and set up drive assembly, piston assembly and the pump body in the casing, the pump body is including connecting in the first check valve group, the second check valve group and the piston cylinder of die cavity, wherein, piston cylinder and piston assembly's piston sliding connection, first check valve group be used for with the inlet of the pump body is connected, the second check valve group be used for with the liquid outlet of the pump body is connected, drive assembly with the piston assembly transmission is connected, so that the piston is in reciprocating motion in the piston cylinder.

Optionally, first check valve group includes first valve body, first valve body with the inlet is connected, just first valve body with be provided with first separation blade between the inlet to make liquid can only follow the one-way inflow of inlet.

Optionally, the first blocking piece comprises a first mounting portion, a first connecting portion and a first stopping portion, the first stopping portion is connected with the first mounting portion through the first connecting portion, the liquid inlet comprises a first abutting portion, and an inner cavity arranged on the first abutting part, the inner cavity is communicated with the piston cylinder, a first bulge and a second bulge are respectively arranged on the side wall of the inner cavity, the distance between the first protrusion and the first stopping portion is smaller than the distance between the second protrusion and the first stopping portion, the first valve body comprises a positioning part and a liquid inlet pipe which are connected with each other, the first mounting part is abutted between the positioning part and the first abutting part, the first connecting part can abut against the first bulge, and the first stopping part can be attached to the liquid inlet pipe or abut against the second bulge.

Optionally, the second check valve group includes the second valve body, the second valve body with the liquid outlet is connected, just the second valve body with be provided with the second separation blade between the liquid outlet to make liquid only can follow the one-way outflow of liquid outlet.

Optionally, the second blocking piece comprises a second mounting portion, a second connecting portion and a second blocking portion, the second blocking portion is connected to the second mounting portion through the second connecting portion, the liquid outlet comprises a port communicated with the piston cylinder, and a platform flush with the port, the second valve body comprises a second abutting part and an accommodating cavity arranged on the second abutting part, the accommodating cavity is communicated with the port, the side wall of the accommodating cavity is respectively provided with a first boss and a second boss, the distance between the first boss and the second stopping portion is smaller than the distance between the second boss and the second stopping portion, the second mounting portion abuts between the platform and the second abutting portion, the second connecting portion can abut against the first boss, and the second stopper portion can be attached to the port or abut against the second boss.

Optionally, the first valve body outside is provided with first annular, the second valve body outside is provided with the second annular, the inboard of second valve body is provided with the third annular, wherein, first annular with be provided with first sealing member between the inlet, the second annular with the liquid outlet and/or the second annular with be provided with the second sealing member between the casing, third annular department is provided with the third sealing member, the third sealing member includes the sealing washer body to and set up a plurality of annular bulge on the sealing washer body, be used for making seal between second valve body and the nozzle.

Optionally, the first blocking piece and the second blocking piece are respectively provided with a positioning notch, the first valve body and the second valve body are respectively provided with an incision, the positioning notch corresponds to the incision, and the incision corresponds to the blocking platform arranged in the cavity.

Optionally, the driving assembly includes a driving motor, a first gear, a second gear and a connecting rod, an output end of the driving motor is fixedly connected to the first gear, the first gear is engaged with the second gear, an eccentric wheel is disposed on the second gear, the connecting rod is respectively connected to the eccentric wheel and the piston to drive the piston to move, and an annular seal is disposed on an outer ring of the piston.

Optionally, the piston assembly comprises a connecting piece and a piston detachably connected with the connecting piece, a blind hole is formed in the connecting piece, a positioning hole is formed in the side wall of the blind hole, a connecting cavity is formed in one end of the connecting rod, a ball head connecting seat is arranged at the other end of the connecting rod, a slotted hole is formed in the connecting cavity, a positioning shaft penetrating through the slotted hole is arranged in the center of the second gear, and a pin shaft penetrating through the positioning hole is arranged on the connecting seat.

In another aspect of the embodiments of the present application, there is provided a tooth-rinsing device, comprising a liquid spraying device as described in any one of the above, and a nozzle connected to a second one-way valve set of the liquid spraying device.

The beneficial effects of the embodiment of the application include:

the hydrojet device that this application embodiment provided, through the organic combination between drive assembly, piston assembly and the pump body and the casing, can fully promote space utilization to under drive assembly's drive, sliding connection between the piston of piston assembly and the piston cylinder of the pump body provides the power basis for the hydrojet. When the space grow in the messenger piston cylinder slides between piston and the piston cylinder, produce the negative pressure in the piston cylinder, according to the one-way conduction characteristic of first check valve group and second check valve group for liquid flows into in the piston cylinder from the first check valve group that the inlet port department of pump body set up. And when the space in the piston cylinder is reduced due to the sliding between the piston and the piston cylinder, the pressure in the piston cylinder is increased, and the liquid flows out from the piston cylinder through the second check valve group arranged at the liquid outlet of the pump body according to the one-way conduction characteristics of the first check valve group and the second check valve group. By adopting the mode, the setting form can be simplified, a more complex form is not required to be set like a pump body (such as a centrifugal pump) in other forms, the running reliability is improved, and when the tooth flushing device is applied to the tooth flushing device, the occupied space can be reduced, and the portability is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a liquid spraying apparatus provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a pump body according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a cavity provided in an embodiment of the present application;

fig. 4 is a schematic structural view illustrating the first valve body and the first blocking plate according to the embodiment of the present disclosure;

fig. 5 is a schematic structural view illustrating the second valve body and the second stopper provided in the embodiment of the present application;

FIG. 6 is a schematic structural diagram of a second valve body provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of the driving assembly and the pump body in cooperation according to an embodiment of the present disclosure;

fig. 8 is a schematic structural view of the tooth irrigator provided by the embodiment of the application.

Icon: 100-a liquid spray device; 110-a housing; 120-a drive assembly; 121-a drive motor; 122 — a first gear; 123-a second gear; 1232-eccentric wheel; 1232a positioning the shaft; 124-connecting rod; 1242-connecting the cavity; 1242 a-slot; 1244-ball head connecting seat; 130-a piston assembly; 132-a piston; 134-a connector; 1342-positioning holes; 140-a pump body; 141-a liquid inlet; 1412-a first abutting part; 1414-a first projection; 1416-a second protrusion; 142-a first check valve set; 1422 — first valve body; 1424-positioning section; 1426-liquid inlet pipe; 1428 — first ring groove; 1428a — first seal; 143-a liquid outlet; 1432-platform; 144-a second check valve set; 1442 — second valve body; 1443-second holding part; 1445 — first boss; 1447 — second boss; 1448 — second ring groove; 1448a — second seal; 1449 — third ring groove; 1449a — third seal; 146-a piston cylinder; 147-a first flap; 1472 — a first mount; 1474-first connection; 1476-first stop; 148-a second baffle plate; 1482-second mount; 1484-second connection; 1486-second stop; 149-a die cavity; 1492-stop table; 200-a tooth flushing device; 210-nozzle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1, 2 and 3, the embodiment provides a liquid spraying apparatus 100, which includes a housing 110, and a driving assembly 120, a piston assembly 130 and a pump body 140 disposed in the housing 110, wherein the pump body 140 includes a first check valve set 142, a second check valve set 144 and a piston cylinder 146 connected to a cavity 149, wherein the piston cylinder 146 is slidably connected to a piston 132 of the piston assembly 130, the first check valve set 142 is connected to an inlet port 141 of the pump body 140, the second check valve set 144 is connected to an outlet port 143 of the pump body 140, and the driving assembly 120 is in driving connection with the piston assembly 130 to reciprocate the piston 132 in the piston cylinder 146.

Specifically, the driving assembly 120, the piston assembly 130 and the pump body 140 are disposed in the housing 110, so as to protect the driving assembly 120, the piston assembly 130 and the pump body 140, and facilitate normal and stable operation of the liquid spraying apparatus 100. The pump body 140 is connected to the first check valve set 142, the second check valve set 144 and the piston cylinder 146 of the cavity 149, for example, the cavity 149 and the piston cylinder 146 may be integrally disposed, so that when the piston 132 slides in the piston cylinder 146, a corresponding pressure change is provided in the piston cylinder 146, thereby achieving the purpose of sucking liquid or spraying liquid.

The first check valve is connected to the liquid inlet 141 of the pump body 140 so that the liquid can only flow into the piston cylinder 146 through the first check valve, and the second check valve is connected to the liquid outlet 143 of the pump body 140 so that the liquid flowing into the piston cylinder 146 can only be ejected through the second check valve. In this way, when the driving assembly 120 drives the piston 132 of the piston assembly 130 to slide in the piston cylinder 146, the liquid can be sucked and ejected, so as to ensure the continuous operation of the liquid spraying apparatus 100.

According to the liquid spraying device 100 provided by the embodiment of the application, the driving assembly 120, the piston assembly 130, and the pump body 140 are organically combined with the housing 110, so that the space utilization rate can be sufficiently improved, and the piston 132 of the piston assembly 130 is slidably connected with the piston barrel 146 of the pump body 140 under the driving of the driving assembly 120, thereby providing a power base for spraying liquid. When the piston 132 slides between the piston cylinder 146 to enlarge the space in the piston cylinder 146, negative pressure is generated in the piston cylinder 146, and liquid flows into the piston cylinder 146 from the first check valve set 142 arranged at the liquid inlet 141 of the pump body 140 according to the one-way conduction characteristics of the first check valve set 142 and the second check valve set 144. When the space in the piston cylinder 146 is reduced due to sliding between the piston 132 and the piston cylinder 146, the pressure in the piston cylinder 146 is increased, and the liquid flows out from the piston cylinder 146 through the second check valve set 144 disposed at the liquid outlet 143 of the pump body 140 according to the one-way conduction characteristics of the first check valve set 142 and the second check valve set 144. By adopting the mode, the arrangement form can be simplified, a more complex form is not required to be arranged like other forms of the pump body 140 (such as a centrifugal pump), the operation reliability is improved, and when the tooth flushing device 200 is applied, the occupied space can be reduced, and the portability is improved.

As shown in fig. 2 and fig. 4, the first check valve set 142 includes a first valve body 1422, the first valve body 1422 is connected to the liquid inlet 141, and a first blocking piece 147 is disposed between the first valve body 1422 and the liquid inlet 141, so that the liquid can only flow in from the liquid inlet 141 in one direction.

Specifically, when negative pressure is present in the piston cylinder 146 by the first stopper 147 provided between the first valve body 1422 and the liquid inlet 141, the first stopper 147 is deformed by the negative pressure, and the liquid is sucked. When the pressure in the piston cylinder 146 increases, the first blocking piece 147 is attached to the first valve body 1422, so that the liquid is prevented from flowing out of the first valve body 1422.

As shown in fig. 2 and 4, the first blocking plate 147 includes a first mounting portion 1472, a first connecting portion 1474 and a first blocking portion 1476, the first blocking portion 1476 is connected to the first mounting portion 1472 through the first connecting portion 1474, the liquid inlet 141 includes a first supporting portion 1412 and an inner cavity formed in the first supporting portion 1412, the inner cavity is communicated with the piston cylinder 146, a first protrusion 1414 and a second protrusion 1416 are respectively formed on a sidewall of the inner cavity, a distance between the first protrusion 1414 and the first blocking portion 1476 is smaller than a distance between the second protrusion 1416 and the first blocking portion 1476, the first valve body 1422 includes a positioning portion 1424 and a liquid inlet pipe 1426 which are connected to each other, the first connecting portion 1474 is supported between the positioning portion 1424 and the first supporting portion 1412, the first connecting portion 1474 can be supported by the first protrusion, and the first blocking portion 1476 can be attached to the liquid inlet pipe 1426 or supported by the second protrusion 1416.

Specifically, in the embodiment of the present application, the arrangement form of the first blocking sheet 147 is not specifically limited, for example, the first blocking sheet 147 may be arranged as rubber, or may also be arranged as a support body by using a thin iron sheet, and the outer layer is arranged as rubber, so as to improve the strength of the first blocking sheet 147. By abutting the first mounting portion 1472 between the positioning portion 1424 and the first abutting portion 1412, the position of the first blocking piece 147 can be stabilized, and the influence of the misalignment of the first blocking piece 147 on the normal use of the first check valve set 142 can be avoided.

When negative pressure is generated in the piston cylinder 146, the first stopper 1476 of the first flap 147 is deflected in the direction of the inner cavity, so that the liquid inlet pipe 1426 of the first valve body 1422 communicates with the piston cylinder 146 through the inner cavity to form a desired liquid inlet passage. In addition, through the first protrusion 1414 and the second protrusion 1416 arranged on the sidewall of the inner cavity, when the first stopping portion 1476 is forced to deflect towards the inner cavity, the first stopping portion 1476 can be abutted against the first protrusion 1414 and the second protrusion 1416, so that the first stopping portion 1476 is supported, the first stopping portion 1476 is prevented from being forced to deform too much, the first blocking sheet 147 can be better protected, and the service life of the first blocking sheet 147 is prolonged. Meanwhile, as the distance between the first protrusion 1414 and the first stopping portion 1476 is smaller than the distance between the second protrusion 1416 and the first stopping portion 1476, the conducting channel can be smoother, and the resistance to liquid flow is reduced. When the pressure in the piston cylinder 146 increases, the first stopping portion 1476 is acted by a reverse force, so that the first stopping portion 1476 is attached to the nozzle of the liquid inlet pipe 1426, and the liquid is prevented from flowing out of the first valve body 1422.

As shown in fig. 2 and 5, the second one-way valve set 144 includes a second valve body 1442, the second valve body 1442 is connected to the liquid outlet 143, and a second baffle 148 is disposed between the second valve body 1442 and the liquid outlet 143, so that the liquid can only flow out of the liquid outlet 143 in one way.

Specifically, when the pressure in the piston cylinder 146 increases due to the second stopper 148 provided between the second valve element 1442 and the liquid outlet 143, the second stopper 148 is deformed by the pressure, and the liquid is ejected. When negative pressure is generated in the piston cylinder 146, the second stopper 148 is engaged with the liquid outlet 143, so that the liquid is prevented from flowing out of the second valve body 1442.

As shown in fig. 2, 5 and 6, the second blocking plate 148 includes a second mounting portion 1482, a second connecting portion 1484 and a second stopping portion 1486, the second stopping portion 1486 is connected to the second mounting portion 1482 through the second connecting portion 1484, the liquid outlet 143 includes a port communicating with the piston cylinder 146, and a land 1432 that is disposed flush with the port, second valve body 1442 includes a second abutment 1443, the accommodating cavity is formed in the second abutting portion 1443 and communicated with the port, a first boss 1445 and a second boss 1447 are arranged on the side wall of the accommodating cavity respectively, the distance between the first boss 1445 and the second stopping portion 1486 is smaller than the distance between the second boss 1447 and the second stopping portion 1486, the second mounting portion 1482 abuts between the platform 1432 and the second abutting portion 1443, the second connecting portion 1484 can abut against the first boss 1445, and the second stopping portion 1486 can abut against the port or the second boss 1447.

Specifically, the arrangement form of the second blocking piece 148 is not particularly limited in the embodiment of the present application, for example, the second blocking piece 148 may be arranged as rubber, or may also be arranged as a support body by using a thin iron sheet, and the outer layer is arranged as rubber to improve the strength of the second blocking piece. By abutting the second mounting portion 1482 between the land 1432 and the second abutting portion 1443, the position of the second retaining piece 148 can be stabilized, and the influence on the normal use of the second check valve group 144 due to the misalignment of the second retaining piece 148 during use can be avoided.

When the pressure in the piston cylinder 146 increases, the second stopping portion 1486 of the second blocking piece 148 deflects toward the direction of the accommodating chamber, so that the outlet of the second valve body 1442 communicates with the piston cylinder 146 through the accommodating chamber to form a desired liquid spraying passage. In addition, through the first boss 1445 and the second boss 1447 that set up on the lateral wall of holding chamber, when second backstop portion 1486 atress deflects to the holding chamber, can support with first boss 1445 and second boss 1447, play the effect of support to second backstop portion 1486, can avoid second backstop portion 1486 atress to warp too big, can be better play the effect of protection to second separation blade 148, promote the life of second separation blade 148. Meanwhile, since the distance between the first boss 1445 and the second stopping portion 1486 is smaller than the distance between the second boss 1447 and the second stopping portion 1486, the conducting channel can be smoother, and the resistance to the flow of the liquid can be reduced. When negative pressure is generated in the piston cylinder 146, the second stopping portion 1486 is acted by a reverse force, so that the second stopping portion 1486 is attached to the port, and negative pressure is prevented from being generated in the piston cylinder 146 due to air leakage at the second check valve group 144, so that liquid can be stably sucked from the first check valve.

As shown in fig. 1, 2, 3 and 6, a first annular groove 1428 is disposed on the outer side of the first valve body 1422, a second annular groove 1448 is disposed on the outer side of the second valve body 1442, and a third annular groove 1449 is disposed on the inner side of the second valve body 1442, wherein a first sealing member 1428a is disposed between the first annular groove 1428 and the liquid inlet 141, a second sealing member 1448a is disposed between the second annular groove 1448 and the liquid outlet 143 and/or between the second annular groove 1448 and the housing 110, a third sealing member 1449a is disposed at the third annular groove 1449, and the third sealing member 1449a includes a sealing ring body and a plurality of annular protrusions disposed on the sealing ring body for sealing between the second valve body 1442 and the nozzle 210.

Specifically, through set up first annular 1428 in the first valve body 1422 outside to when setting up first sealing member 1428a between first annular 1428 and inlet 141, first annular 1428 can play spacing effect to first sealing member 1428a, and simultaneously, first sealing member 1428a can play sealed effect to between first valve body 1422 and the inlet 141, prevents junction weeping. The second valve body 1442 corresponds to the pump body 140 and the housing 110, and the second annular groove 1448 is formed in the second valve body 1442, so that the second annular groove 1448 can limit the second sealing element 1448a, and the second sealing element 1448a can seal between the second valve body 1442 and the liquid outlet 143. When the second sealing member 1448a is provided between the second valve body 1442 and the housing 110, sealability can be further improved by the double sealing. The first sealing member 1428a and the second sealing member 1448a may be O-rings or Y-seals, and may be flexibly disposed as required in practical applications. Through set up third annular 1449 at the inboard of second valve body 1442 to set up third sealing member 1449a at third annular 1449, so that seal between second valve body 1442 and the nozzle, through set up a plurality of annular archs on the sealing washer body, be favorable to further reinforcing sealed effect, when setting up the nozzle, in order to guarantee the leakproofness of junction.

In an alternative embodiment of the present application, as shown in fig. 3, 4 and 5, the first blocking plate 147 and the second blocking plate 148 are respectively provided with a positioning notch, the first valve body 1422 and the second valve body 1442 are respectively provided with a notch, the positioning notch is arranged corresponding to the notch, and the notch is arranged corresponding to the blocking table 1492 arranged in the cavity 149.

By adopting the above manner, when the first valve body 1422 and the second valve body 1442 are respectively assembled with the pump body 140, the relative positions of the fitting can be ensured, and the assembly error can be avoided. Meanwhile, the positioning notch corresponds to the notch, so that the first blocking piece 147 or the second blocking piece 148 is prevented from being reversely assembled to influence the normal use of the first check valve set 142 or the second check valve set 144. In addition, with the above-mentioned form, when the first mounting portion 1472 abuts against between the positioning portion 1424 and the first abutting portion 1412, or the second mounting portion 1482 abuts against between the platform 1432 and the second abutting portion 1443, the stability of the setting positions of the first blocking piece 147 and the second blocking piece 148 can be ensured, and the first blocking piece 147 or the second blocking piece 148 is prevented from deflecting to affect the suction or ejection of the liquid.

As shown in fig. 1 and 7, the driving assembly 120 includes a driving motor 121, a first gear 122, a second gear 123 and a connecting rod 124, an output end of the driving motor 121 is fixedly connected to the first gear 122, the first gear 122 is engaged with the second gear 123, an eccentric 1232 is disposed on the second gear 123, the connecting rod 124 is respectively connected to the eccentric 1232 and the piston 132 to drive the piston 132 to move, and an annular seal is disposed on an outer ring of the piston 132.

Specifically, the present embodiment does not specifically limit the arrangement form of the first gear 122 and the second gear 123, and for example, when the first gear 122 adopts a worm, the second gear 123 adopts a helical gear; when the first gear 122 adopts a spur gear, the second gear 123 adopts a face gear; when the first gear 122 is a bevel gear, the second gear 123 may also be a bevel gear; as long as stable transmission connection is achieved through the above cooperation. Through being provided with eccentric 1232 on second gear 123, connecting rod 124 is connected with eccentric 1232 and piston 132 respectively, when second gear 123 rotates, the distance between eccentric 1232 and the piston cylinder 146 becomes nearly or becomes far away to drive piston 132 through connecting rod 124 and reciprocate in piston cylinder 146, in addition, through set up the ring seal in piston 132 outer lane, be favorable to strengthening the leakproofness between piston 132 and the piston cylinder 146, the emergence probability of weeping has been reduced, be favorable to promoting the stability when using.

As shown in fig. 1 and 7, the piston assembly 130 includes a connecting member 134 and a piston 132 detachably connected to the connecting member 134, the connecting member 134 is provided with a blind hole, a positioning hole 1342 is formed in a side wall of the blind hole, one end of the connecting rod 124 is provided with a connecting cavity 1242, the other end of the connecting rod is provided with a ball joint seat 1244, the connecting cavity 1242 is provided with a slot 1242a, a positioning shaft penetrating through the slot 1242a is disposed at the center of the second gear 123, and the ball joint seat 1244 is provided with a pin penetrating through the positioning hole 1342.

Specifically, through can dismantling between connecting piece 134 and the piston 132 and be connected, when piston 132 wearing and tearing, conveniently change, be favorable to reducing use cost, promote economic benefits. In addition, the connecting member 134 is provided with a blind hole, so that the connecting rod 124 can be inserted into the blind hole, and the pin can pass through the positioning hole 1342 on the side wall of the blind hole to connect and position the ball connecting seat 1244 of the connecting rod 124. Meanwhile, the connecting rod 124 is connected with the eccentric wheel 1232 on the second gear 123 through the connecting cavity 1242, the connecting cavity 1242 is provided with a slot 1242a, the length direction of the slot 1242a is consistent with the moving direction of the piston 132, and the positioning shaft is located at the rotation center of the second gear 123, so that when the eccentric wheel 1232 drives the connecting rod 124 to move through the connecting cavity 1242, the connecting rod 124 can only move along the moving direction of the piston 132, no swing is generated, noise is effectively avoided from collision, and the stability and reliability of operation are guaranteed.

As shown in fig. 8, the embodiment of the present application further discloses a tooth flusher 200, which includes the liquid spraying device 100 in the foregoing embodiments, and a nozzle 210, wherein the nozzle 210 is connected to the second check valve set 144 of the liquid spraying device 100, so that the liquid sprayed from the liquid spraying device 100 is sprayed into the oral cavity through the nozzle 210. Wherein, the nozzles 210 can be flexibly arranged according to actual needs. The dental irrigator 200 includes the same structure and advantageous effects as the liquid spray device 100 of the previous embodiment. The structure and advantages of the liquid spraying device 100 have been described in detail in the foregoing embodiments, and are not repeated herein.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a hydrojet device, its characterized in that, includes the casing, and sets up drive assembly, piston assembly and the pump body in the casing, the pump body is including connecting in the first check valve group, second check valve group and the piston barrel of die cavity, wherein, piston barrel and piston assembly's piston sliding connection, first check valve group be used for with the inlet of the pump body is connected, the second check valve group be used for with the liquid outlet of the pump body is connected, drive assembly with the piston assembly transmission is connected, so that the piston is in reciprocating motion in the piston barrel.

2. The liquid spraying device as claimed in claim 1, wherein the first check valve set comprises a first valve body, the first valve body is connected to the liquid inlet, and a first blocking piece is disposed between the first valve body and the liquid inlet, so that the liquid can only flow in one direction from the liquid inlet.

3. The liquid spraying apparatus of claim 2, wherein the first blocking piece comprises a first mounting portion, a first connecting portion and a first stopping portion, the first stopping part is connected with the first mounting part through the first connecting part, the liquid inlet comprises a first abutting part, and an inner cavity arranged on the first abutting part, the inner cavity is communicated with the piston cylinder, a first bulge and a second bulge are respectively arranged on the side wall of the inner cavity, the distance between the first protrusion and the first stopping portion is smaller than the distance between the second protrusion and the first stopping portion, the first valve body comprises a positioning part and a liquid inlet pipe which are connected with each other, the first mounting part is abutted between the positioning part and the first abutting part, the first connecting part can abut against the first bulge, and the first stopping part can be attached to the liquid inlet pipe or abut against the second bulge.

4. The liquid spraying device as claimed in claim 2 or 3, wherein the second check valve set comprises a second valve body, the second valve body is connected with the liquid outlet, and a second baffle is arranged between the second valve body and the liquid outlet, so that the liquid can only flow out from the liquid outlet in one direction.

5. The liquid spraying device of claim 4, wherein the second blocking piece comprises a second mounting portion, a second connecting portion and a second stopping portion, the second stopping portion is connected with the second mounting portion through the second connecting portion, the liquid outlet comprises a port communicated with the piston cylinder and a platform flush with the port, the second valve body comprises a second abutting portion and a containing cavity formed in the second abutting portion, the containing cavity is communicated with the port, a first boss and a second boss are respectively arranged on the side wall of the containing cavity, the distance between the first boss and the second stopping portion is smaller than the distance between the second boss and the second stopping portion, the second mounting portion abuts between the platform and the second abutting portion, and the second connecting portion can abut against the first boss, the second stopping part can be attached to the port or abutted against the second boss.

6. The liquid spraying apparatus of claim 5, wherein a first ring groove is formed on an outer side of the first valve body, a second ring groove is formed on an outer side of the second valve body, a third ring groove is formed on an inner side of the second valve body, wherein a first sealing member is disposed between the first ring groove and the liquid inlet, a second sealing member is disposed between the second ring groove and the liquid outlet and/or between the second ring groove and the housing, a third sealing member is disposed at the third ring groove, and the third sealing member comprises a sealing ring body and a plurality of annular protrusions disposed on the sealing ring body, so as to seal between the second valve body and the nozzle.

7. The liquid spraying apparatus of claim 5, wherein the first catch and the second catch each have a positioning notch, the first valve body and the second valve body each have a notch, the positioning notches correspond to the notches, and the notches correspond to the stops disposed in the cavities.

8. The liquid spraying device according to any one of claims 1 to 3, wherein the driving assembly comprises a driving motor, a first gear, a second gear and a connecting rod, an output end of the driving motor is fixedly connected with the first gear, the first gear is meshed with the second gear, the second gear is provided with an eccentric wheel, the connecting rod is respectively connected with the eccentric wheel and the piston to drive the piston to move, and the outer ring of the piston is further provided with an annular seal.

9. The liquid spraying device of claim 8, wherein the piston assembly comprises a connecting member and the piston detachably connected to the connecting member, the connecting member is provided with a blind hole, a positioning hole is formed in a side wall of the blind hole, one end of the connecting rod is provided with a connecting cavity, the other end of the connecting rod is provided with a ball joint seat, the connecting cavity is provided with a slot hole, the center of the second gear is provided with a positioning shaft penetrating through the slot hole, and the connecting seat is provided with a pin shaft penetrating through the positioning hole.

10. A dental irrigator comprising a liquid spraying device according to any one of claims 1 to 9 and a nozzle connected to a second one-way valve assembly of said liquid spraying device.