CN216922405U - Water pumping device and tooth flushing device comprising same - Google Patents

Abstract

The application relates to a water pumping device and a tooth flushing device comprising the same, wherein the water pumping device comprises a pump body shell, a driving mechanism and a water pumping mechanism, and the driving mechanism comprises a driving motor and a driving arm; the water pumping mechanism is provided with a water absorbing flow passage and a water discharging flow passage; the water pumping mechanism comprises a water pumping main body, one side, facing the driving arm, of the water pumping main body is provided with a flexible water pumping cup sac, and the water pumping cup sac is installed at one end, far away from the driving motor, of the driving arm; the water pumping main body is provided with a driving cavity communicated with the water suction flow channel and the water drainage flow channel, and the water pumping cup bag seals the driving cavity and compresses or expands the driving cavity; the water suction flow passage is provided with a water suction check valve which seals the water suction flow passage in a one-way mode along the water pumping direction, and the water drainage flow passage is provided with a water drainage check valve which seals the water drainage flow passage in a one-way mode along the water pumping direction. The water pumping mechanism pumps water by self deformation in the working process, and the reciprocating friction process is avoided in the water pumping mechanism, so that the noise problem of the tooth flushing device after long-time use is solved.

Description

Water pumping device and tooth flushing device comprising same

Technical Field

The application relates to the field of oral cleaning tools, in particular to a water pumping device and a tooth flushing device comprising the same.

Background

The tooth flusher is an auxiliary tool for cleaning the oral cavity, and mainly utilizes a pulse water flow impact mode to clean teeth, thereby achieving the purposes of cleaning dental plaque on the surfaces of the teeth and keeping the oral cavity clean.

In the related technical means, the tooth flushing device is driven by a rechargeable battery to operate by a motor, the motor drives a water pumping device to operate, so that water stored in a water tank is periodically pumped out from a spray head, the aim of pumping out pulse water flow is fulfilled, and the water pumping device of the tooth flushing device usually adopts a plunger pump structure.

According to the technical means, the tooth flushing device is used for a period of time, and the plunger pump runs at a high speed to generate noise inside the plunger pump due to friction, so that the use experience is influenced.

SUMMERY OF THE UTILITY MODEL

In order to improve the noise problem of the tooth flusher after long-time use, the application provides a water pumping device and a tooth flusher comprising the same.

In a first aspect, the present application provides a water pumping device, which adopts the following technical scheme.

A water pumping device comprising:

a pump body housing having a drive section and a pumping section;

the driving mechanism is arranged on the driving section and comprises a driving motor and a driving arm driven by the driving motor to reciprocate;

the water pumping mechanism is arranged on the water pumping section and is provided with a water absorbing flow passage and a water discharging flow passage; the water pumping mechanism comprises a water pumping main body, a flexible water pumping cup sac is arranged on one side, facing the driving arm, of the water pumping main body, and the water pumping cup sac is installed at one end, far away from the driving motor, of the driving arm; the water pumping main body is provided with a driving cavity communicated with the water suction flow channel and the water drainage flow channel, and the water pumping cup bag seals the driving cavity and compresses or expands the driving cavity; the water suction flow passage is provided with a water suction one-way valve which seals the water suction flow passage in a one-way mode along the water pumping direction, and the water drainage flow passage is provided with a water drainage one-way valve which seals the water drainage flow passage in a one-way mode along the water pumping direction.

By adopting the technical scheme, the water suction flow channel is provided with the water suction one-way valve which seals the water suction flow channel in a one-way mode along the water pumping direction, the water drainage flow channel is provided with the water drainage one-way valve which seals the water drainage flow channel in a one-way mode along the water pumping direction, the driving cavity is sealed by the water pump cup bag, and the volume in the driving cavity is periodically changed in the process that the driving arm is driven by the driving motor to reciprocate and the water pump cup bag is driven to compress or expand the driving cavity. The driving cavity is communicated with the water suction flow channel and the water drainage flow channel, when the driving cavity is expanded, the pressure intensity in the driving cavity is reduced, at the moment, the water drainage flow channel is closed, the water suction flow channel is opened, and the water pumping mechanism is in a water suction state; when the driving cavity is compressed, the pressure in the driving cavity is increased, at the moment, the drainage flow channel is opened, the water absorption flow channel is closed, and the water pumping mechanism is in a water pumping state. In the process of reciprocating motion of the driving arm, the water pumping mechanism can continuously pump water from the water suction flow channel into the water drainage flow channel. The flexible pump cup bag deformation produces the pressure difference, compares in the plunger pump, and among this technical scheme, the pump water mechanism relies on self deformation to carry out the pump water work in the course of the work, and does not have the process of reciprocating friction in the pump water mechanism to improve the noise problem that tooth ware appears after long-time the use.

Optionally, the water pumping main body is provided with a water suction port and a water discharge port, a water suction pipe and a water suction valve plate are arranged at the position of the water suction port of the water pumping main body, the water suction pipe closes the water suction port, and a water suction flow channel is formed by a pipe cavity of the water suction pipe and a space where the water suction port is located; the water pumping main body is provided with a drain pipe and a drain valve plate at the position of the drain outlet, the drain pipe seals the drain outlet, and a drain flow channel is formed by a pipe cavity of the drain pipe and the space where the drain outlet is located.

By adopting the technical scheme, the water suction pipe and the water discharge pipe respectively seal the water suction port and the water discharge port of the water pumping main body, the water suction flow passage is formed by the pipe cavity of the water suction pipe and the space where the water suction port is located, the water discharge flow passage is formed by the pipe cavity of the water discharge pipe and the space where the water discharge port is located, and the water suction valve piece and the water discharge valve piece mainly play a key role in one-way conduction.

Optionally, the water suction valve plate has a first non-return portion and a first water passing opening, the first non-return portion is in the water suction opening has a reciprocating motion activity space along the pumping direction, the water suction valve plate has the first non-return portion to close the closed state of the water suction pipe and the first water passing opening is to the open state of the driving cavity and the pipe cavity of the water suction pipe, and when the pump cup bag is compressed during the driving cavity, the water suction valve plate is in the closed state.

By adopting the technical scheme, when the water pump cup bag compresses the driving cavity, the first non-return part of the water suction valve plate seals the water suction pipe, so that the water pressure in the driving cavity is continuously increased, and the water in the driving cavity can only flow out of the drain pipe; when the first water passing port communicates the driving cavity with the cavity of the water suction pipe, the water pumping mechanism can suck water from the water suction pipe, and the water suction stability of the water pumping device is ensured.

Optionally, the drain valve plate has a second non return portion and a second water passing opening, the second non return portion is in the movable space of reciprocating motion is arranged in the water outlet along the water pumping direction, the drain valve plate has the second non return portion to close the closed state of the water discharging pipe and the second water passing opening is to open the driving cavity and the pipe cavity of the water discharging pipe, and when the water pumping cup bag expands the driving cavity, the drain valve plate is in the closed state.

By adopting the technical scheme, when the water pumping cup bag expands the driving cavity, the second non-return part of the drainage valve plate seals the drainage pipe, so that the water pressure in the driving cavity is continuously reduced, and therefore, water in the driving cavity can only be sucked from the water suction pipe; when the second water passing opening communicates the driving cavity with the cavity of the drain pipe, the water pumping mechanism can drain water from the drain pipe, and the water pumping stability of the water pumping device is guaranteed.

Optionally, the water pumping main body is further provided with a first anti-sticking groove for reducing a contact area between the first check portion and the water pumping main body at the position of the water suction port, and when the water suction valve plate is in an open state, the first anti-sticking groove is communicated with the driving cavity and the pipe cavity of the water suction pipe.

Through adopting above-mentioned technical scheme, when the water sucking valve piece is in the open mode, first antiseized groove can the holding with guide the intraductal water that absorbs water enters into the drive intracavity from the water sucking mouth. And first antiseized groove can reduce the area of contact between first non return portion and the pumping main part, improves the problem of water absorption valve block and the adhesion of pumping main part to make water absorption valve block can be reciprocating motion more nimble at the mouth that absorbs water, improve water absorption valve block's functional stability.

Optionally, the end face of the drain pipe, which faces the driving cavity, is provided with a second anti-sticking groove for reducing the contact area between the second check portion and the end face of the drain pipe, and when the drain valve plate is in an open state, the second anti-sticking groove is communicated with the driving cavity and the pipe cavity of the drain pipe.

Through adopting above-mentioned technical scheme, when the drain valve piece was in the open mode, the antiseized groove of second can the holding with guide the water of drive intracavity enter into in the drain pipe from the outlet. And the antiseized groove of second can reduce the area of contact between second non return portion and the drain pipe, improves the problem of drainage valve block and drain pipe adhesion to make the drainage valve block can be reciprocating motion more nimble at the outlet, improve the functional stability of drainage valve block.

Optionally, the driving mechanism further includes a face gear driven by the driving motor to rotate, and the face gear has an eccentric driving column arranged eccentrically; and a driving hole is formed in one side of the driving arm, which is far away from the water pumping cup bag, and the eccentric driving column penetrates through the driving hole and is in rotating fit with the driving arm.

By adopting the technical scheme, the eccentric driving column is eccentrically arranged on the plane gear, and in the process that the driving motor drives the plane gear to rotate, the central position of the eccentric driving column rotates around the rotating axis of the plane gear with a certain radius. The eccentric driving column penetrates through the driving hole and is in rotating fit with the driving arm, so that the driving arm is driven to reciprocate by the eccentric driving column to realize the function of compressing or expanding the water cup bag of the pump in a reciprocating manner.

Optionally, the driving section is provided with a thrust spring, one end of the thrust spring is clamped to the driving section, the other end of the thrust spring abuts against the outer wall of the pump cup bag, and the thrust spring has thrust for pushing the pump cup bag to compress the driving cavity.

By adopting the technical scheme, when the driving arm compresses the water cup bag of the pump, the thrust spring also plays a role in doing work. When the driving arm compresses the pump water cup bag, the work absorbed by the thrust spring is released quickly, the pressure of pulse water flow during drainage is improved, and the tooth flushing device is more efficient.

In a second aspect, the present application provides a tooth irrigator, which adopts the following technical scheme.

A tooth flushing device, which comprises the water pumping device.

Through adopting above-mentioned technical scheme, the tooth ware that washes that contains this pumping device relies on pumping mechanism self deformation to carry out the pumping work at the course of the work, and does not have the process of reciprocating friction in pumping mechanism to improve the noise problem that tooth ware appears after long-time the use.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the driving cavity is expanded, the pressure in the driving cavity is reduced, at the moment, the drainage flow channel is closed, the water absorption flow channel is opened, and the water pumping mechanism is in a water absorption state; when the driving cavity is compressed, the pressure in the driving cavity is increased, at the moment, the drainage flow channel is opened, the water absorption flow channel is closed, and the water pumping mechanism is in a water pumping state. In the process of reciprocating motion of the driving arm, the water pumping mechanism can continuously pump water from the water suction flow channel into the water drainage flow channel.

2. The central position of the eccentric drive column will perform a rotation with a certain radius around the rotation axis of the face gear. The eccentric driving column penetrates through the driving hole and is in rotating fit with the driving arm, so that the driving arm is driven to reciprocate by the eccentric driving column to realize the function of compressing or expanding the water cup bag of the pump in a reciprocating manner.

3. The tooth flushing device comprising the water pumping device is characterized in that the water pumping mechanism is used for pumping water through self deformation in the working process, and the reciprocating friction process is avoided in the water pumping mechanism, so that the noise problem of the tooth flushing device after long-time use is solved.

Drawings

FIG. 1 is a schematic view of a hidden pump body casing portion according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a half-section structure of a water pumping body in an embodiment of the present application;

FIG. 3 is a schematic structural view of a water absorbing valve sheet according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a drain valve plate according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a water pumping body showing a first anti-sticking groove in the embodiment of the application;

fig. 6 is a schematic view showing a drain structure of a second anti-sticking groove in the embodiment of the present application.

Description of reference numerals:

100. a pump body housing; 110. a drive section; 120. a water pumping section;

200. a drive mechanism; 210. a drive motor; 211. a drive gear; 220. a face gear; 221. an eccentric drive column; 230. a drive arm; 231. a rotating part; 232. a connecting portion; 233. a drive aperture;

300. a water pumping mechanism; 310. a water absorption flow passage; 320. a drainage flow channel; 330. a water pumping body; 331. a drive chamber; 332. a suction pipe; 333. a water absorption valve plate; 3331. a first non-return portion; 3332. a first water passing opening; 334. a drain pipe; 3341. a second anti-sticking groove; 335. a drain valve plate; 3351. a second non-return portion; 3352. a second water passing opening; 336. a first anti-sticking groove; 340. a water pumping capsule; 341. an installation part; 342. a working part; 350. a thrust spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a tooth flushing device, which comprises a machine body (not shown in the attached drawing), a water pumping device, a water tank (not shown in the attached drawing) and a tooth flushing spray head (not shown in the attached drawing), wherein the water pumping device is arranged on the machine body, and water in the water tank is sucked in by the water pumping device and is sprayed out in a pulse mode from the tooth flushing spray head, so that the tooth flushing function is realized. Specifically, referring to fig. 1, the water pumping device comprises a pump body housing 100, and a driving mechanism 200 and a water pumping mechanism 300 which are arranged inside the pump body housing 100, wherein the driving mechanism 200 is used for providing power for the water pumping mechanism 300, and the water pumping mechanism 300 is used for sucking water in a water tank and spraying the water from a tooth flushing spray head. The pump body housing 100 is locked up and down by an upper case and a lower case through bolts, and the pump body housing 100 may be divided into a driving section 110 in which the driving mechanism 200 is installed and a pumping section 120 in which the pumping mechanism 300 is installed according to functional regions.

Referring to fig. 1, the driving mechanism 200 includes a driving motor 210, a plane gear 220 and a driving arm 230, the driving motor 210 is fixedly installed at a side of the driving section 110 away from the pumping section 120, the plane gear 220 is rotatably installed at a side of the driving section 110 close to the pumping section 120, a driving gear 211 is coaxially and fixedly installed on an output shaft of the driving motor 210, and the driving gear 211 is meshed with the plane gear 220, so that the plane gear 220 can be driven to rotate by the driving motor 210. An eccentric driving column 221 is provided on the upper surface of the face gear 220, the eccentric driving column 221 is provided in a cylindrical shape, and the central axis of the eccentric driving column 221 is spaced apart from the central axis of the face gear 220. In the present embodiment, the distance between the central axis of the eccentric driving post 221 and the central axis of rotation of the face gear 220 is 1.7 mm.

Referring to fig. 1, the driving arm 230 includes a rotating portion 231 and a connecting portion 232, the rotating portion 231 is substantially hollow-cylindrical, the connecting portion 232 of the driving arm 230 is integrally formed with the rotating portion 231, and the connecting portion 232 is substantially rod-shaped. The upper surface of the rotating portion 231 is provided with a driving hole 233 in a penetrating manner, and the rotating portion 231 of the driving arm 230 is sleeved on the outer surface of the eccentric driving post 221, so that the eccentric driving post 221 penetrates through the driving hole 233 and is in rotating fit with the driving arm 230. During the driving motor 210 drives the plane gear 220 to rotate, the rotating part 231 rotates around the rotation axis of the plane gear 220 with a certain radius, thereby implementing the function of driving the arm 230 to reciprocate. In order to ensure that the eccentric driving post 221 and the rotating portion 231 of the driving arm 230 rotate more smoothly, grease or grease may be added between the rotating portion 231 and the eccentric driving post 221, or a bearing may be added between the rotating portion 231 and the eccentric driving post 221, so as to reduce the sliding friction force during the rotation process and improve the operating smoothness of the driving mechanism 200.

Referring to fig. 1 and 2, the water pumping mechanism 300 includes a water pumping main body 330 and a water pumping cup bag 340 disposed toward the side where the driving arm 230 is located, and the water pumping cup bag 340 is made of a flexible material such as rubber. The pump cup bag 340 is installed at one end of the driving arm 230 far away from the driving motor 210, the pump cup bag 340 is provided with an installation part 341 and a working part 342, and the installation part 341 of the pump cup bag 340 is clamped with the connecting part 232 of the driving arm 230, so that the pump cup bag 340 is convenient to replace.

Referring to fig. 2, the water pumping body 330 is arranged in a three-way pipe shape, a driving cavity 331 is arranged on one side of the water pumping body 330 close to the water pumping cup bag 340, a water outlet is arranged opposite to the driving cavity 331, and a water suction port is arranged on one side of the driving cavity 331. The pump cup bladder 340 encloses the drive chamber 331 and the pump cup bladder 340 is capable of compressing or expanding the drive chamber 331. The water pumping main body 330 is provided with a water suction pipe 332 and a water suction valve sheet 333 at the position of the water suction port, the water suction pipe 332 closes the water suction port, and the space where the pipe cavity of the water suction pipe 332 and the water suction port are located forms a water suction flow channel 310; the water pumping body 330 is provided with a drain pipe 334 and a drain valve plate 335 at the position of the drain port, the drain pipe 334 seals the drain port, and the space where the pipe cavity of the drain pipe 334 and the drain port are located forms the drain flow passage 320. The driving chamber 331 communicates the water suction flow passage 310 with the water discharge flow passage 320. The water suction flow passage 310 is provided with a water suction check valve for unidirectionally closing the water suction flow passage 310 along the water pumping direction, and the water discharge flow passage 320 is provided with a water discharge check valve for unidirectionally closing the water discharge flow passage 320 along the water pumping direction. In this embodiment, the suction check valve is a suction valve plate 333, and the discharge check valve is a discharge valve plate 335.

Referring to fig. 2 and 3, the water pumping main body 330 is provided with a cylindrical installation groove at a position where the suction pipe 332 is located, a sealing gasket is installed on the outer circumferential surface of the suction pipe 332, and the suction pipe 332 is fixedly connected with the water pumping main body 330 in a threaded manner. A cylindrical accommodation space is provided between the suction pipe 332 and the suction port, and the suction valve sheet 333 is disposed in the accommodation space. The water suction valve sheet 333 has a first check portion 3331 and a first water passing hole 3332, and the first water passing hole 3332 is disposed around the first check portion 3331. The first check part 3331 is disposed in a disc shape, and the diameter of the first check part 3331 is larger than the inner diameter of the port of the barrel 332. The suction valve sheet 333 has a closed state in which the first check portion 3331 closes the suction pipe 332 and an open state in which the first water passing port 3332 communicates the driving chamber 331 with the chamber of the suction pipe 332. When the pumping cup bag 340 compresses the driving chamber 331, the water suction valve sheet 333 is in a closed state; when the pump cup bladder 340 expands the driving chamber 331, the suction valve sheet 333 is in an open state.

Referring to fig. 2 and 4, the water pumping body 330 is provided with a cylindrical mounting groove at a position where the water discharge pipe 334 is located, a sealing washer is mounted on an outer circumferential surface of the water discharge pipe 334, the water discharge pipe 334 is fixedly connected with the water pumping body 330 in a threaded manner, and the water discharge valve 335 is disposed between the water discharge pipe 334 and the water pumping body 330. The drain valve plate 335 has a second check portion 3351 and a second water passing hole 3352, and the second water passing hole 3352 is partially surrounded by the second check portion 3351. The second check 3351 is generally disc-shaped and the area of the second check 3351 is larger than the area of the inner tube of the port of the drain pipe 334. A movable space for the second check part 3351 to reciprocate is formed between the port of the water discharge pipe 334 and the water discharge valve plate 335, the water discharge valve plate 335 has a closed state in which the second check part 3351 closes the water discharge pipe 334 and an open state in which the second water passing hole 3352 communicates the driving chamber 331 with the lumen of the water discharge pipe 334, and when the driving chamber 331 is expanded by the water pumping cup 340, the water discharge valve plate 335 is in the closed state; when the pumping cup bladder 340 compresses the driving chamber 331, the drain valve piece 335 is in an open state.

In other embodiments, the water suction pipe 332 and the water pumping main body 330 may also use the water discharge valve plate 335 instead of the water suction valve plate 333, so as to reduce the difference of parts, improve the universality of the parts, and reduce the production cost without affecting the function of the water pumping device.

Referring to fig. 2, when the pump cup bladder 340 expands the driving chamber 331, the second check portion 3351 of the drain valve sheet 335 closes the drain pipe 334, resulting in a continuous decrease in the water pressure in the driving chamber 331, so that the water in the driving chamber 331 can be sucked only from the suction pipe 332. When the first water passing port 3332 connects the driving chamber 331 with the lumen of the suction pipe 332, the water pumping mechanism 300 can suck water from the suction pipe 332; when the pumping cup bag 340 compresses the driving chamber 331, the first check portion 3331 of the suction valve plate 333 closes the suction pipe 332, so that the water pressure in the driving chamber 331 continuously increases, and thus the water in the driving chamber 331 can only flow out through the drain pipe 334. When the second water passing port 3352 communicates the driving chamber 331 with the lumen of the water discharge pipe 334, the water pumping mechanism 300 can discharge water from the water discharge pipe 334.

Referring to fig. 2, in the process that the driving arm 230 is driven by the driving motor 210 to reciprocate and the pump cup bag 340 is driven to compress or expand the driving cavity 331, the internal volume of the driving cavity 331 changes periodically. The driving chamber 331 communicates the water suction flow passage 310 with the water discharge flow passage 320, when the driving chamber 331 expands, the pressure in the driving chamber 331 decreases, at this time, the water discharge flow passage 320 is closed, the water suction flow passage 310 is opened, and the water pumping mechanism 300 is in a water suction state; when the driving chamber 331 is compressed, the pressure inside the driving chamber 331 increases, and at this time, the drainage flow path 320 is opened, the water suction flow path 310 is closed, and the water pumping mechanism 300 is in a water pumping state. The water pumping mechanism 300 can continuously pump water from the water suction flow passage 310 into the water discharge flow passage 320 during the reciprocating motion of the driving arm 230. The flexible water pumping cup bag 340 deforms to generate pressure difference, the water pumping mechanism 300 pumps water by means of self deformation in the working process, and the reciprocating friction process is avoided in the water pumping mechanism 300, so that the noise problem of the tooth flushing device after long-time use is solved.

Referring to fig. 5, the water pumping main body 330 is further provided with a first anti-sticking groove 336 for reducing the contact area between the first check part 3331 and the water pumping main body 330 at the position of the water suction port, the first anti-sticking groove 336 can reduce the contact area between the first check part 3331 and the water pumping main body 330, and the problem of adhesion between the water suction valve sheet 333 and the water pumping main body 330 is solved, so that the water suction valve sheet 333 can reciprocate more flexibly at the water suction port, and the functional stability of the water suction valve sheet 333 is improved. When the water suction valve sheet 333 is in an open state, the first anti-sticking groove 336 communicates the driving cavity 331 with the cavity of the water suction pipe 332, and the first anti-sticking groove 336 can accommodate and guide water in the water suction pipe 332 to enter the driving cavity 331 from the water suction port.

Referring to fig. 6, the end surface of the drain pipe 334 facing the driving cavity 331 is provided with a second anti-sticking groove 3341 for reducing the contact area between the second check portion 3351 and the end surface of the drain pipe 334, and the second anti-sticking groove 3341 can reduce the contact area between the second check portion 3351 and the drain pipe 334, so that the problem of adhesion of the drain valve sheet 335 and the drain pipe 334 is solved. When the drain valve plate 335 is in an open state, the second anti-sticking groove 3341 communicates the driving cavity 331 with the cavity of the drain pipe 334, and the second anti-sticking groove 3341 can accommodate and guide water in the driving cavity 331 to enter the drain pipe 334 from the drain port.

Referring to fig. 1, in order to increase the pressure of the pulse water flow during water discharge, a thrust spring 350 is installed at a position of the pump body housing 100 close to the connecting portion 232, one end of the thrust spring 350 is clamped in a fixing groove of the pump body housing 100, and the other end of the thrust spring 350 abuts against the outer wall of the pump cup bag 340. Since the thrust spring 350 has a thrust force for pushing the pump cup bag 340 to compress the driving cavity 331, the thrust spring 350 also performs a function of doing work when the driving arm 230 compresses the pump cup bag 340. Partial work of the driving motor 210 is absorbed by the thrust spring 350, and when the driving arm 230 compresses the pump water cup bag 340, the work absorbed by the thrust spring 350 is released rapidly, so that the pressure of pulse water flow during drainage is improved, and the tooth flushing device is more efficient.

The implementation principle of the water pumping device and the tooth flushing device comprising the same is as follows: in the process that the driving arm 230 is driven by the driving motor 210 to reciprocate and the pumping cup bag 340 is driven to compress or expand the driving cavity 331, the internal volume of the driving cavity 331 changes periodically. The driving chamber 331 communicates the water suction flow passage 310 with the water discharge flow passage 320, when the driving chamber 331 expands, the pressure in the driving chamber 331 decreases, at this time, the water discharge flow passage 320 is closed, the water suction flow passage 310 is opened, and the water pumping mechanism 300 is in a water suction state; when the driving chamber 331 is compressed, the pressure inside the driving chamber 331 increases, at this time, the drainage flow passage 320 is opened, the water suction flow passage 310 is closed, and the water pumping mechanism 300 is in a water pumping state. The water pumping mechanism 300 can continuously pump water from the water suction flow passage 310 into the water discharge flow passage 320 during the reciprocating motion of the driving arm 230.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereby. Wherein like parts are designated by like reference numerals. It should be noted that as used in the foregoing description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. A water pumping apparatus, comprising: a pump body housing (100), the pump body housing (100) having a drive section (110) and a pump water section (120);

the driving mechanism (200) is arranged on the driving section (110), and the driving mechanism (200) comprises a driving motor (210) and a driving arm (230) driven by the driving motor (210) to reciprocate;

the water pumping mechanism (300) is installed on the water pumping section (120), and the water pumping mechanism (300) is provided with a water absorbing flow passage (310) and a water draining flow passage (320); the water pumping mechanism (300) comprises a water pumping main body (330), a flexible water pumping cup sac (340) is arranged on one side, facing the driving arm (230), of the water pumping main body (330), and the water pumping cup sac (340) is installed at one end, far away from the driving motor (210), of the driving arm (230); the water pumping main body (330) is provided with a driving cavity (331) communicating the water suction flow passage (310) and the water drainage flow passage (320), and the water pumping cup bag (340) closes the driving cavity (331) and compresses or expands the driving cavity (331); the water suction flow channel (310) is provided with a water suction one-way valve which seals the water suction flow channel (310) in a one-way mode along the water pumping direction, and the water drainage flow channel (320) is provided with a water drainage one-way valve which seals the water drainage flow channel (320) in a one-way mode along the water pumping direction.

2. The water pumping device according to claim 1, wherein the water pumping main body (330) has a water suction port and a water discharge port, the water pumping main body (330) is provided with a water suction pipe (332) and a water suction valve sheet (333) at the position of the water suction port, the water suction pipe (332) closes the water suction port, and a space where the water suction port is located and a lumen of the water suction pipe (332) form a water suction flow passage (310); the water pumping main body (330) is provided with a drain pipe (334) and a drain valve plate (335) at the position of the drain port, the drain pipe (334) seals the drain port, and a pipe cavity of the drain pipe (334) and the space where the drain port is located form a drain flow passage (320).

3. A water pumping device according to claim 2, wherein the water sucking valve sheet (333) has a first check part (3331) and a first water passing opening (3332), the first check part (3331) has a space for reciprocating motion at the water sucking opening along the water pumping direction, the water sucking valve sheet (333) has a closed state in which the first check part (3331) closes the water sucking pipe (332) and an open state in which the first water passing opening (3332) communicates the driving chamber (331) with the lumen of the water sucking pipe (332), and the water sucking valve sheet (333) is in the closed state when the water pumping capsule (340) compresses the driving chamber (331).

4. A water pumping device according to claim 2, wherein the water discharge valve plate (335) has a second check portion (3351) and a second water passing opening (3352), the second check portion (3351) has a movable space reciprocating along the water pumping direction at the water discharge opening, the water discharge valve plate (335) has a closed state in which the second check portion (3351) closes the water discharge pipe (334) and an open state in which the second water passing opening (3352) communicates the driving chamber (331) with the cavity of the water discharge pipe (334), and the water discharge valve plate (335) is in the closed state when the water pumping capsule (340) expands the driving chamber (331).

5. The water pumping device as claimed in claim 3, wherein the water pumping main body (330) is further provided with a first anti-sticking groove (336) at the position of the water suction port for reducing the contact area between the first check part (3331) and the water pumping main body (330), and when the water suction valve plate (333) is in the open state, the first anti-sticking groove (336) is communicated with the driving cavity (331) and the cavity of the water suction pipe (332).

6. A water pumping device according to claim 4, wherein the end surface of the water discharge pipe (334) facing the driving chamber (331) is provided with a second anti-sticking groove (3341) for reducing the contact area between the second check portion (3351) and the end surface of the water discharge pipe (334), and when the water discharge valve plate (335) is in the open state, the second anti-sticking groove (3341) is communicated with the tube cavities of the driving chamber (331) and the water discharge pipe (334).

7. A water pumping device according to claim 1, wherein the driving mechanism (200) further comprises a plane gear (220) driven by the driving motor (210) to rotate, the plane gear (220) having an eccentric driving column (221) arranged eccentrically; the side, away from the pump cup bag (340), of the driving arm (230) is provided with a driving hole (233), and the eccentric driving column (221) penetrates through the driving hole (233) and is in rotating fit with the driving arm (230).

8. The water pumping device as claimed in claim 1, wherein the driving section (110) is provided with a thrust spring (350), one end of the thrust spring (350) is clamped to the driving section (110), the other end of the thrust spring (350) is pressed against the outer wall of the water pumping cup bag (340), and the thrust spring (350) has a thrust force for pushing the water pumping cup bag (340) to compress the driving cavity (331).

9. A dental irrigator comprising a water pumping device according to any one of claims 1 to 8.

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