A dental irrigator with a water pump

Abstract

This utility model relates to a water pump for a dental irrigator, comprising a pump housing; a drive motor is fixedly installed inside the pump housing, and a transmission gear is fixedly installed at the output end of the drive motor; a circular rotating plate is provided inside the pump housing, and the circular rotating plate has end face teeth; a base is provided on the circular rotating plate, and a working contour surface is provided on the base; a pump body is also provided inside the pump housing, and a drive rod is provided on the pump body; the working contour surface is composed of one or more adjacent and connected arc-shaped contour surfaces; the drive rod forms surface contact or line contact with the arc-shaped contour surface; the arc-shaped contour surface includes a return arc-shaped surface, a first stop arc-shaped surface, a lift arc-shaped surface, and a second stop arc-shaped surface; the return arc-shaped surface and the lift arc-shaped surface are eccentrically positioned with respect to the circular rotating plate; the two sides of the second stop arc-shaped surface are respectively connected to the lift arc-shaped surface and the lift arc-shaped surface, or the two sides of the second stop arc-shaped surface are respectively connected to the lift arc-shaped surface and the return arc-shaped surface on the adjacent arc-shaped contour surface. This utility model has an ingenious structure and is convenient and practical.

Description

Technical Field

[0001] This utility model relates to the field of water pumps for dental irrigators, and in particular to a water pump for dental irrigators. Background Technology

[0002] A water flosser, also known as a dental irrigator or water flosser, is a new type of oral hygiene device. It uses the impact force of a high-speed jet of water under pressure to achieve a cleaning effect, reaching a depth of 50-90% into the gingival sulcus, cleaning various crevices, pores, and uneven surfaces. By using a suitable pulsed water jet or incorporating more air bubbles into the water flow to create a similar vibrational impact, the cleaning effect is further enhanced.

[0003] The water pump in existing dental irrigators uses an eccentric wheel mechanism. The existing pump core's motion curve is V-shaped due to the eccentric wheel mechanism. As a result, the water inlet volume, water inlet speed, and water outlet speed of the existing pump core are relatively simple. However, dental irrigators need to adjust the water inlet volume and water outlet speed according to different needs during the cleaning process. Obviously, the traditional pump core has low applicability and is very inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a water pump for a dental irrigator. It has a clever structure and can adjust the water storage capacity according to different usage needs, thereby meeting various usage requirements and being convenient and practical.

[0005] The technical solution to achieve the purpose of this utility model is as follows: This utility model has a pump casing; a drive motor is fixedly installed inside the pump casing, and a transmission gear is fixedly installed at the output end of the drive motor; a circular rotating plate is installed inside the pump casing, and an end face tooth is provided on the circular rotating plate coaxially arranged with the circular rotating plate; the circular rotating plate is rotatably installed inside the pump casing through the drive of the drive motor to the transmission gear and the transmission engagement between the transmission gear and the end face tooth; a base integrally formed with the circular rotating plate is provided on the circular rotating plate, and a working contour surface is provided on the base; a pump body is also installed inside the pump casing, and a drive rod is provided on the pump body to drive the pump body to suck water or drain water by reciprocating sliding; the working contour surface on the base cooperates with the drive rod through the rotation of the circular rotating plate and controls the drive rod to raise or lower the rod; the working contour surface is composed of one or more adjacent and connected arc-shaped contour surfaces, and the drive rod presses against the arc-shaped contour surface. The arc-shaped contour surface forms surface or line contact with the pump body. The arc-shaped contour surface includes a return arc-shaped surface that drives the drive rod to lower and drive the pump body to suck water, a first stop arc-shaped surface that suppresses dynamic impact in the pump body and forces a switch to static sealing after water suction, a lift arc-shaped surface that drives the drive rod to raise and discharge water from the pump body, and a second stop arc-shaped surface that allows water to be completely discharged from the pump body. The return arc-shaped surface and the lift arc-shaped surface are eccentrically set with the circular rotating plate. The first stop arc-shaped surface and the second stop arc-shaped surface are both coaxially set with the circular rotating plate, and the diameter of the second stop arc-shaped surface is larger than the diameter of the first stop arc-shaped surface. The two sides of the first stop arc-shaped surface are respectively connected to the return arc-shaped surface and the lift arc-shaped surface, and the two sides of the second stop arc-shaped surface are respectively connected to the lift arc-shaped surface and the lift arc-shaped surface, or the two sides of the second stop arc-shaped surface are respectively connected to the lift arc-shaped surface and the return arc-shaped surface on the adjacent arc-shaped contour surface.

[0006] Furthermore, the pump body is provided with an inlet and an outlet, both of which are equipped with one-way valves. The pump body is provided with an inlet channel and an outlet channel, the inlet channel being connected to the inlet and the outlet channel being connected to the outlet. The pump body is also provided with an inlet chamber and a storage chamber, the inlet chamber being connected to both the inlet channel and the outlet channel. The inlet chamber and the storage chamber are both coaxially arranged with the pump body, and the inner diameter of the inlet chamber is smaller than the diameter of the storage chamber. The storage chamber is provided with a piston plate coaxially arranged and slidably arranged within the storage chamber. The drive rod is fixed below the piston plate. The storage chamber is also provided with a return spring, the two ends of which act on the piston plate and the bottom of the storage chamber, respectively.

[0007] Furthermore, the drive rod is provided with a connecting rod coaxially arranged with the piston plate at one end. The diameter of the connecting rod is smaller than that of the drive rod. The base is provided with a contour portion that can be connected to the connecting rod. The contour portion is arranged on the working contour surface of the base along the contour of the base.

[0008] Furthermore, the aforementioned contour portion is a contour groove provided on the working contour surface of the substrate along the contour of the substrate. One end of the connecting rod away from the drive rod extends into the contour groove and presses against the bottom of the contour groove. The connecting rod presses against the bottom of the contour groove by continuously applying force to the drive rod through the return spring.

[0009] Furthermore, the aforementioned contour portion is a protrusion set on the working contour surface of the base body along the contour of the base body. The end of the connecting rod away from the drive rod is provided with a limiting groove corresponding to the protrusion portion. The limiting groove on the connecting rod is pressed against the protrusion portion by the continuous force applied to the drive rod by the return spring.

[0010] Furthermore, the aforementioned inlet is provided with a first connecting slot and an inlet pipe, and the outlet is provided with a second connecting slot and an outlet pipe. The inlet pipe is provided with a first connecting tube corresponding to the first connecting slot, the length of the first connecting tube being less than the depth of the first connecting slot, and the outer diameter of the first connecting tube being equal to the inner diameter of the first connecting slot. The outlet pipe is provided with a second connecting tube corresponding to the second connecting slot, the length of the second connecting tube being less than the depth of the second connecting slot, and the outer diameter of the second connecting tube being equal to the inner diameter of the second connecting slot. Both the outer walls of the first and second connecting tubes are provided with sealing rings. The first connecting slot is provided with a first recessed groove, which communicates with the inlet channel. The second connecting tube is provided with a second recessed groove. A plastic partition that controls the opening and closing of the first connecting tube is provided between the first connecting tube and the first recessed groove. A plastic partition that controls the opening and closing of the outlet channel is also provided between the second connecting tube and the second recessed groove.

[0011] Furthermore, the aforementioned partition is provided with a water passage groove, and a sealing plate integrally formed with the partition is provided in the water passage groove. The diameter of the sealing plate is larger than the inner diameter of the first connecting pipe and larger than the diameter of the water outlet channel.

[0012] This utility model has the following positive effects: (1) This utility model sets a base on a circular rotating plate. The circular rotating plate rotates through the cooperation of the transmission gear and the end face teeth, and drives the base to rotate. During the rotation of the base, the driving rod makes line contact or surface contact with the arc-shaped contour surface. The arc-shaped contour surface is set as a combination of the return arc surface, the first stop arc surface, the lift arc surface and the second stop arc surface. The cooperation between the driving rod and the return arc surface can absorb and store water in the pump body. Through the cooperation between the driving rod and the first stop arc surface, the impact of the water flow can be buffered after water absorption and storage, while suppressing the dynamic impact in the pump body and forcibly switching to static sealing. The lifting arc surface discharges the stored water through the drive rod, and then the water is completely discharged through the cooperation of the drive rod and the second stop arc surface. By setting one or more adjacent and connected arc contour surfaces, the water storage volume can be controlled according to different usage environments. Multiple arc contour surface bases can be selected according to usage needs, thereby achieving continuous water storage and drainage. This effectively solves the problem that the eccentric wheel structure in the existing technology has a single usage environment and cannot be adapted to various usage environments. It greatly improves the controllability of water storage and drainage in the pump body of the water flosser, and thus is suitable for various different usage environments. It has good adjustability and applicability, and is efficient and convenient.

[0013] (2) This utility model provides a reset spring in the water storage cavity. By providing a reset spring, the piston plate can be continuously pressed during the water absorption process, thereby ensuring that the drive rod can be continuously and stably pressed against the arc-shaped contour surface. At the same time, it can also prevent the piston plate from separating from the water storage tank. During the drainage process, the continuous force of the reset spring can prevent the piston plate from directly colliding with the bottom of the water storage cavity, ensuring the stability of the piston plate during the sliding process, and also ensuring the stable pressing of the drive rod against the arc-shaped contour surface at each stage. It is convenient and practical.

[0014] (3) By setting a connecting rod on the drive rod, when the contour part is set as a contour groove, the connecting rod continuously applies force to the drive rod through the return spring. When the contour part is set as a protrusion, a limiting slot corresponding to the protrusion can be set on the connecting rod. The cooperation between the connecting rod and the contour groove, as well as the cooperation between the protrusion and the limiting slot, effectively ensures the stability of the drive rod during the lifting and lowering process. At the same time, by limiting the connecting rod, it also avoids the connecting rod from shifting during the pressing process with the arc contour surface, which is safe and practical.

[0015] (4) This utility model is designed to connect a first connecting slot to an inlet pipe and a second connecting slot to an outlet pipe. The first connecting tube and the second connecting tube are sealed to the first connecting slot and the second connecting slot respectively by sealing rings. The length of the first connecting tube is set to be less than the length of the first connecting slot and the length of the second connecting tube is set to be less than the length of the second connecting slot, thereby giving the partition a space for deformation. When water enters, the partition in the first connecting slot is flushed open by water, thereby ensuring the connection between the first connecting tube and the inlet channel. When water does not enter, the partition is reset by its own plasticity, thereby sealing the first connecting tube. When water drains, the partition in the second connecting slot deforms, thereby connecting the outlet channel with the second connecting tube. When water does not drain, the outlet channel is sealed by plastic reset. This can effectively prevent backflow during water entry and drainage, ensuring the stability of water entry and drainage, and is efficient and convenient.

[0016] (5) This utility model provides a water flow channel by setting a water channel on the partition plate when the sealing plate is opened. At the same time, when there is no water inlet or drainage, the first connecting pipe and the water outlet channel can be sealed in time, which further ensures the airtightness during the water inlet and drainage process and is stable and practical. Attached Figure Description

[0017] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0018] Figure 1 This is a schematic diagram of the overall structure of the water pump in the dental irrigator of this utility model;

[0019] Figure 2 This is a schematic diagram of the connection structure where the drive rod presses against the base in Embodiment 1;

[0020] Figure 3 This is a cross-sectional view of the overall structure of the pump body in this utility model;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0023] Figure 6 This is a schematic diagram of the overall structure of the partition plate of this utility model;

[0024] Figure 7 This is a schematic diagram of the connection structure where the drive rod presses against the base in Embodiment 2;

[0025] The attached figures are labeled as follows:

[0026] Drive motor 1, transmission gear 11, circular rotating plate 2, end face teeth 21, pump body 3, drive rod 31, connecting rod 32, limit slot 321, piston plate 33, return spring 34, water inlet channel 35, water inlet chamber 36, water storage chamber 37, water outlet channel 38, first settling tank 39, second settling tank 310, working contour surface 4, return arc surface 41, first stop arc surface 42, lift arc surface 43, second stop arc surface 44, contour groove 45, protrusion 46, water inlet pipe 5, first connecting pipe 51, water outlet pipe 6, second connecting pipe 61, sealing ring 7, partition plate 8, water passage groove 81, sealing plate 82. Detailed Implementation

[0027] (Example 1)

[0028] See Figures 1 to 6 This utility model includes a pump casing; a drive motor 1 is fixedly installed inside the pump casing, and a transmission gear 11 is fixedly installed at the output end of the drive motor 1. A circular rotating plate 2 is installed inside the pump casing, and an end face tooth 21 is provided on the circular rotating plate 2 coaxially arranged with the circular rotating plate 2. The circular rotating plate 2 is rotatably installed inside the pump casing through the drive of the transmission gear 11 by the drive motor 1 and the transmission engagement between the transmission gear 11 and the end face tooth 21. A base integrally formed with the circular rotating plate 2 is provided on the circular rotating plate 2, and a working contour surface 4 is provided on the base. A pump body 3 is also provided inside the pump casing, and a drive rod 31 is provided on the pump body 3 to drive the pump body 3 to suck water or drain water by reciprocating sliding. The working contour surface 4 on the base is controlled by the rotation of the circular rotating plate 2 and the engagement with the drive rod 31 to raise or lower the rod. The working contour surface 4 is composed of one or more adjacent and connected arc-shaped contour surfaces. The drive rod 31 forms surface contact or line contact with the arc-shaped contour surface by pressing against it. The arc-shaped contour surface includes, in sequence, a return arc-shaped surface 41 that drives the drive rod 31 to lower and drive the pump body 3 to suck water; a first stop arc-shaped surface 42 that suppresses dynamic impact within the pump body 3 and forces a switch to static sealing after water suction; a lift arc-shaped surface 43 that drives the drive rod 31 to raise and discharge water from the pump body 3; and a second stop arc-shaped surface 44 that allows complete discharge of water from the pump body 3. The return arc-shaped surface 41 and the lift arc-shaped surface 43 are eccentrically positioned relative to the circular rotating plate 2. The first stop arc surface 42 and the second stop arc surface 44 are both coaxially arranged with the circular rotating plate 2, and the diameter of the second stop arc surface 44 is larger than the diameter of the first stop arc surface 42. The two sides of the first stop arc surface 42 are respectively connected to the return arc surface 41 and the lift arc surface 43, and the two sides of the second stop arc surface 44 are respectively connected to the lift arc surface 43 and the lift arc surface 43, or the two sides of the second stop arc surface 44 are respectively connected to the lift arc surface 43 and the return arc surface 41 on the adjacent arc contour surface.

[0029] The pump body 3 is provided with an inlet and an outlet, both of which are equipped with one-way valves. The pump body 3 has an inlet channel 35 and an outlet channel 38, with the inlet channel 35 communicating with the inlet and the outlet channel 38 communicating with the outlet. The pump body 3 also has an inlet chamber 36 and a storage chamber 37, with the inlet chamber 36 communicating with both the inlet channel 35 and the outlet channel 38. The inlet chamber 36 and the storage chamber 37 are coaxially arranged with the pump body 3, and the inner diameter of the inlet chamber 36 is smaller than the diameter of the storage chamber 37. The storage chamber 37 has a piston plate 33 coaxially arranged and slidably arranged within it. The drive rod 31 is fixed below the piston plate 33. The storage chamber 37 also has a return spring 34, with both ends of the return spring 34 acting on the piston plate 33 and the bottom of the storage chamber 37, respectively.

[0030] The drive rod 31 has a connecting rod 32 coaxially arranged at one end away from the piston plate 33. The diameter of the connecting rod 32 is smaller than the diameter of the drive rod 31. The base has a contour portion that can be connected to the connecting rod 32. The contour portion is arranged on the working contour surface 4 of the base along the contour of the base.

[0031] The contour part is a contour groove 45 set on the working contour surface 4 of the substrate along the contour of the substrate. One end of the connecting rod 32 away from the driving rod 31 extends into the contour groove 45 and presses against the bottom of the contour groove 45. The connecting rod 32 presses against the bottom of the contour groove 45 by continuously applying force to the driving rod 31 through the return spring 34.

[0032] The inlet is provided with a first connecting slot and an inlet pipe 5, and the outlet is provided with a second connecting slot and an outlet pipe 6. The inlet pipe 5 is provided with a first connecting tube 51 corresponding to the first connecting slot. The length of the first connecting tube 51 is less than the depth of the first connecting slot, and the outer diameter of the first connecting tube 51 is equal to the inner diameter of the first connecting slot. The outlet pipe 6 is provided with a second connecting tube 61 corresponding to the second connecting slot. The length of the second connecting tube 61 is less than the depth of the second connecting slot, and the outer diameter of the second connecting tube 61 is equal to the inner diameter of the second connecting slot. The first connecting tube 51 and the second connecting tube 61 are both provided with sealing rings 7 on their outer walls, with the same inner diameter as the second connecting slot. The first connecting slot is provided with a first recess 39, which is connected to the water inlet channel 35. The second connecting tube 61 is provided with a second recess 310. A plastic partition 8 that can control the opening and closing of the first connecting tube 51 is provided between the first connecting tube 51 and the first recess 39. A plastic partition 8 that can control the opening and closing of the water outlet channel 38 is also provided between the second connecting tube 61 and the second recess 310.

[0033] The partition 8 is provided with a water passage groove 81, and a sealing plate 82 integrally formed with the partition 8 is provided in the water passage groove 81. The diameter of the sealing plate 82 is larger than the inner diameter of the first connecting tube 51 and larger than the diameter of the water outlet channel 38.

[0034] (Example 2)

[0035] See Figure 7 In this utility model, the contour part is a protrusion 46 that is set on the working contour surface 4 of the base along the contour of the base. The end of the connecting rod 32 away from the driving rod 31 is provided with a limiting groove 321 corresponding to the protrusion 46. The limiting groove 321 on the connecting rod 32 presses against the protrusion 46 by the continuous force applied to the driving rod 31 by the return spring 34. The remaining technical features are the same as those in Embodiment 1.

[0036] The working principle of this utility model is as follows: During the use of this utility model, the user can choose to install a circular rotating plate 2 with different working contour surfaces 4 according to the needs of use. When the water volume required by the water irrigator is fixed, a circular rotating plate 2 with an arc-shaped contour surface can be selected. When the water volume required by the water irrigator is not fixed, a base with multiple adjacent arc-shaped contour surfaces can be selected. Then, the circular rotating plate 2 is installed in the pump housing and can be rotatably connected to the pump housing. The drive motor 1 drives the transmission gear 11 to rotate. The circular rotating plate 2 is rotatably set in the pump housing through the drive motor 1 driving the transmission gear 11 and the transmission gear 11 and the end face tooth 21.

[0037] When the water pump is drawing water, the drive motor 1 drives the circular rotating plate 2 to rotate. During the rotation of the circular rotating plate 2, the drive rod 31 and the connecting rod 32 on the drive rod 31 continuously apply force to the piston plate 33 through the return spring 34, pressing it against the arc-shaped contour surface. When the contour part on the working contour surface 4 is a contour groove 45, the connecting rod 32 extends into the contour groove 45 and presses against the bottom of the contour groove 45. When the contour part on the working contour surface 4 is a protrusion 46, the limiting slot 321 on the connecting rod 32 is connected to the protrusion 46 to limit the connection, thereby achieving stable pressing between the connecting rod 32 and the protrusion 46. When the connecting rod 32 presses against the return arc-shaped surface 41... During the process of water intake, the return arc surface 41 rotates to draw water. Water flows from the inlet pipe 5 into the first connecting pipe 51 and pushes open the sealing plate 82. It then enters the inlet chamber 36 through the arc-shaped water channel 81. The connecting rod 32 then contacts the first stop arc surface 42. During the contact with the first stop arc surface 42, dynamic impact within the pump body 3 is suppressed and a static seal is forcibly switched. Next, the connecting rod 32 presses against the lift arc surface 43. During the pressing process, the piston plate 33 is lifted and water is discharged. During the discharge process, the water in the outlet channel 38 pushes open the sealing plate 82 and enters the second connecting pipe 61 through the arc-shaped water channel 81 and is discharged.

[0038] This invention effectively solves the problem that the pump core in the prior art has a relatively simple inlet water volume, inlet water speed and outlet water speed and poor applicability. By setting one or more adjacent and connected arc-shaped contour surfaces on the base, it can be used in various different environments, with good adjustability and applicability. The structure is ingenious, convenient and practical.

[0039] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water pump for a dental irrigator, comprising a pump casing; characterized in that: A drive motor is fixedly installed inside the pump casing. A transmission gear is fixedly installed at the output end of the drive motor. A circular rotating plate is installed inside the pump casing. The circular rotating plate has end face teeth coaxially arranged with the rotating plate. The circular rotating plate is rotatably mounted inside the pump casing through the drive motor driving the transmission gear and the transmission engagement between the transmission gear and the end face teeth. A base integrally formed with the circular rotating plate is provided on the circular rotating plate. A working contour surface is provided on the base. A pump body is also installed inside the pump casing. The pump body has a drive rod that reciprocates to drive the pump body to draw or drain water. The working contour surface on the base, through the rotation of the circular rotating plate and its engagement with the drive rod, controls the lifting or lowering of the drive rod. The working contour surface consists of one or more adjacent and connected arc-shaped contour surfaces. The drive rod forms surface contact with the arc-shaped contour surfaces by pressing against them. The arc-shaped contour surface includes a return arc-shaped surface that drives the drive rod to lower and the pump body to suck water, a first stop arc-shaped surface that suppresses dynamic impact within the pump body and forces a switch to static sealing after water suction, a lift arc-shaped surface that drives the drive rod to raise and discharge water from the pump body, and a second stop arc-shaped surface that allows complete discharge of water from the pump body. The return arc-shaped surface and the lift arc-shaped surface are eccentrically arranged with respect to the circular rotating plate. The first stop arc-shaped surface and the second stop arc-shaped surface are both coaxially arranged with the circular rotating plate, and the diameter of the second stop arc-shaped surface is larger than the diameter of the first stop arc-shaped surface. The two sides of the first stop arc-shaped surface are respectively connected to the return arc-shaped surface and the lift arc-shaped surface, and the two sides of the second stop arc-shaped surface are respectively connected to the lift arc-shaped surface and the lift arc-shaped surface, or the two sides of the second stop arc-shaped surface are respectively connected to the lift arc-shaped surface and the return arc-shaped surface on the adjacent arc-shaped contour surface.

2. The water pump for a dental irrigator according to claim 1, characterized in that: The pump body is provided with an inlet and an outlet, each equipped with a one-way valve. The pump body is provided with an inlet channel and an outlet channel, the inlet channel being connected to the inlet and the outlet channel being connected to the outlet. The pump body is also provided with an inlet chamber and a storage chamber, the inlet chamber being connected to both the inlet channel and the outlet channel. The inlet chamber and the storage chamber are both coaxially arranged with the pump body, and the inner diameter of the inlet chamber is smaller than the diameter of the storage chamber. The storage chamber is provided with a piston plate coaxially arranged and slidably disposed within the storage chamber. The drive rod is fixed below the piston plate. The storage chamber is also provided with a return spring, the two ends of which act on the piston plate and the bottom of the storage chamber, respectively.

3. The water pump for a dental irrigator according to claim 2, characterized in that: The drive rod has a connecting rod coaxially arranged at one end away from the piston plate. The diameter of the connecting rod is smaller than that of the drive rod. The base has a contour part that can be connected with the connecting rod. The contour part is arranged on the working contour surface of the base along the contour of the base.

4. A water pump for a dental irrigator according to claim 3, characterized in that: The contour part is a contour groove set on the working contour surface of the substrate along the contour of the substrate. The end of the connecting rod away from the driving rod extends into the contour groove and presses against the bottom of the contour groove. The connecting rod presses against the bottom of the contour groove by continuously applying force to the driving rod through the return spring.

5. A water pump for a dental irrigator according to claim 3, characterized in that: The contour portion is a protrusion set on the working contour surface of the base body along the contour of the base body. The end of the connecting rod away from the drive rod is provided with a limiting groove corresponding to the protrusion portion. The limiting groove on the connecting rod is pressed against the protrusion portion by the continuous force applied to the drive rod by the return spring.

6. A water pump for a dental irrigator according to claim 4 or 5, characterized in that: The inlet is provided with a first connecting slot and an inlet pipe, and the outlet is provided with a second connecting slot and an outlet pipe. The inlet pipe is provided with a first connecting tube corresponding to the first connecting slot. The length of the first connecting tube is less than the depth of the first connecting slot, and the outer diameter of the first connecting tube is equal to the inner diameter of the first connecting slot. The outlet pipe is provided with a second connecting tube corresponding to the second connecting slot. The length of the second connecting tube is less than the depth of the second connecting slot, and the outer diameter of the second connecting tube is equal to the inner diameter of the second connecting slot. Both the first and second connecting tubes are provided with sealing rings on their outer walls. The first connecting slot is provided with a first recessed groove that communicates with the inlet channel. The second connecting tube is provided with a second recessed groove. A plastic partition that controls the opening and closing of the first connecting tube is provided between the first connecting tube and the first recessed groove. A plastic partition that controls the opening and closing of the outlet channel is also provided between the second connecting tube and the second recessed groove.

7. A water pump for a dental irrigator according to claim 6, characterized in that: The partition is provided with a water passage groove, and a sealing plate integrally formed with the partition is provided in the water passage groove. The diameter of the sealing plate is larger than the inner diameter of the first connecting pipe and larger than the diameter of the water outlet channel.

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