Water pump for oral irrigator and oral irrigator with water pump

Abstract

The utility model discloses a water pump of an oral irrigator and the oral irrigator with the water pump. The water pump of the oral irrigator comprises a water pump shell, the driving mechanism is installed in the water pump shell, and the driving mechanism is provided with a transmission part; the side, facing the driving mechanism, of the water outlet mechanism is connected with an elastic membrane for sealing the water outlet mechanism, the elastic membrane and the interior of the water outlet mechanism jointly define a water outlet channel, and a water storage cavity is formed in the side, facing the elastic membrane, of the water channel; wherein when the elastic membrane does not deform, an elastic membrane concave surface is formed on one side of the elastic membrane, an elastic membrane convex surface is formed on the other side of the elastic membrane, the elastic membrane convex surface protrudes towards the direction of the driving mechanism, and the transmission part of the driving mechanism is suitable for abutting against the elastic membrane and enabling the elastic membrane to deform towards the water storage cavity. The water pump of the oral irrigator has the advantages of being good in sealing performance, large in water pressure, long in service life and the like.

Description

Technical Field

[0001] This utility model relates to the field of dental floss equipment technology, and in particular to a dental floss pump and a dental floss device. Background Technology

[0002] In related technologies, oral irrigators use a water pump that compresses water through a piston rod within the water outlet mechanism to produce water. However, during the water dispensing process, gaps can easily form between the piston rod and the inner wall of the pump body. Although sealing rings can be used, relying on these rings between the piston and pump body is susceptible to wear over time or improper operation, resulting in a shorter lifespan. Furthermore, the piston rod on the transmission mechanism side has poor sealing, allowing water to easily leak through the gap between the piston rod and the pump body, posing a risk of leakage. Additionally, for some oral irrigator pumps using diaphragm pumps, the elastic diaphragm deforms due to wrinkling, resulting in a limited deformation range, lower water pressure, and poor oral irrigating effect. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a water pump for a dental irrigator that has advantages such as good sealing, high water pressure, and long service life.

[0004] This utility model also proposes a dental flosser with a dental flosser pump.

[0005] To achieve the above objectives, a water pump for a dental irrigator is provided according to an embodiment of the first aspect of this utility model, comprising: a water pump housing; a drive mechanism installed inside the water pump housing, the drive mechanism having a transmission part; and a water outlet mechanism, wherein an elastic diaphragm is connected to the side of the water outlet mechanism facing the drive mechanism to close the water outlet mechanism, the elastic diaphragm and the interior of the water outlet mechanism jointly defining a water outlet channel, and the side of the water channel facing the elastic diaphragm forming a water storage cavity; wherein, when the elastic diaphragm is not deformed, one side forms a concave elastic diaphragm surface and the other side forms a convex elastic diaphragm surface, the convex elastic diaphragm surface protruding towards the drive mechanism, and the transmission part of the drive mechanism is adapted to abut against the elastic diaphragm and cause the elastic diaphragm to deform towards the water storage cavity.

[0006] The water pump for the oral irrigator according to the present invention has advantages such as good sealing performance, high water pressure, and long service life.

[0007] According to some specific embodiments of the present invention, the water outlet mechanism has a diaphragm connector on the side facing the drive mechanism, the interior of the diaphragm connector is connected to the water storage cavity, and the outer ring of the elastic diaphragm is sealed around the diaphragm connector.

[0008] Further, the elastic diaphragm includes: a mounting ring edge that surrounds and seals the elastic diaphragm connector; a cup portion that is connected to the radial center of the mounting ring edge, wherein the cup portion forms an elastic diaphragm concave surface on one side and an elastic diaphragm convex surface on the other side when no deformation occurs, and the transmission part is adapted to abut against the cup portion and cause the cup portion to deform in the direction of the water storage cavity.

[0009] Furthermore, the outer peripheral surface of the diaphragm connector is constructed with a plurality of cedar tree clips arranged along the axial direction, and the outer diameter of each cedar tree clip gradually increases towards the waterway. The inner peripheral surface of the mounting ring is interference-fitted with the cedar tree clip to form a seal.

[0010] According to some specific embodiments of the present invention, the water outlet mechanism includes: a pump body, wherein the water channel is formed in the pump body and has an inlet water channel and an outlet water channel, both of which are connected to the water storage chamber; an inlet connector, which is installed on the radial side of the pump body and connected to the inlet water channel; and an outlet connector, which is installed on the side of the pump body away from the drive mechanism and connected to the outlet water channel.

[0011] Further, the pump body includes: a pump head, the inlet connector being installed on the radial side of the pump head, and the outlet connector being installed on the side of the pump head away from the elastic diaphragm along its axis; an end cap, the end cap being installed on the side of the pump head opposite to the outlet connector, the end cap being in contact with the side of the elastic diaphragm opposite to the water channel when the elastic diaphragm is not deformed, and the end cap having a through hole suitable for the transmission part to pass through.

[0012] Furthermore, the surface of the pump head facing the elastic diaphragm is configured to form a water cavity concave surface, and the water storage cavity is formed between the water cavity concave surface and the elastic diaphragm concave surface of the elastic diaphragm. The transmission part is adapted to stop against the elastic diaphragm and cause the elastic diaphragm to undergo elastic deformation towards the water cavity concave surface.

[0013] According to some specific embodiments of this utility model, the driving mechanism includes a water pump motor and a transmission mechanism. The water pump motor is installed inside the water pump housing. The transmission mechanism is drively connected to the water pump motor, and the transmission part is formed at one end of the transmission mechanism.

[0014] Furthermore, the transmission mechanism includes a driving gear, a driven gear, and a transmission cover. The driving gear is connected to the motor shaft of the water pump motor. The driven gear meshes with the driving gear, and a cam is constructed on one side of the driven gear. The transmission cover is installed inside the water pump housing, and the cam is drivingly connected to the transmission cover. One end of the transmission cover is connected to the transmission part.

[0015] The following describes a water flosser according to an embodiment of the present invention.

[0016] The oral irrigator according to an embodiment of the present invention includes: an oral irrigator water pump according to the above embodiment of the present invention.

[0017] The oral irrigator according to the embodiments of the present invention has advantages such as good sealing performance, high water pressure, and long service life by using the water pump of the oral irrigator according to the above embodiments of the present invention.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a structural schematic diagram of the water pump for a dental flosser according to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the water pump for a dental flosser according to an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the pump body of the water pump for a dental flosser according to an embodiment of the present utility model;

[0023] Figure 4 This is a cross-sectional view of the water pump for a dental flosser according to an embodiment of the present utility model;

[0024] Figure label:

[0025] Water pump 1, water pump housing 100, drive mechanism 200, transmission unit 201, water outlet mechanism 300 for oral irrigator

[0026] Waterway 301, elastic diaphragm 400, water storage chamber 302, elastic diaphragm connector 31

[0027] Mounting ring 410, leather cup 420, cedar tree clip 32

[0028] Pump body 310, inlet channel 303, outlet channel 304, inlet connector 320, outlet connector 330

[0029] Pump head 311, end cover 312, water cavity concave surface 313, water pump motor 210, transmission mechanism 220

[0030] Driven gear 221, driven gear 222, cam 223, transmission cover 224, and tooth-flush device 2. Detailed Implementation

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0033] In the description of this utility model, "multiple" means two or more.

[0034] The following description, with reference to the accompanying drawings, describes a water pump 1 for a dental flosser according to an embodiment of the present invention.

[0035] like Figures 1-4 As shown, the water pump 1 for a dental irrigator according to an embodiment of the present invention includes: a water pump housing 100, a drive mechanism 200, and a water outlet mechanism 300. The drive mechanism 200 is installed inside the water pump housing 100 and has a transmission part 201. An elastic diaphragm 400 that closes the water outlet mechanism 300 is connected to the side of the water outlet mechanism 300 facing the drive mechanism 200. The elastic diaphragm 400 and the interior of the water outlet mechanism 300 together define a water outlet channel 301, and a water storage cavity 302 is formed on the side of the water outlet channel 301 facing the elastic diaphragm 400.

[0036] When the elastic diaphragm 400 is not deformed, one side forms a concave surface and the other side forms a convex surface. The convex surface protrudes toward the drive mechanism 200. The transmission part 201 of the drive mechanism 200 is adapted to stop the elastic diaphragm 400 and cause the elastic diaphragm 400 to deform toward the water storage chamber 302.

[0037] For example, the end face of the transmission part 201 is adapted to the shape of the convex arc surface of the elastic diaphragm 400, and the transmission part 201 abuts against the center of the elastic diaphragm 400. The elastic diaphragm 400 can be a rubber part with a certain elastic deformation capability, and the outer periphery of the elastic diaphragm 400 closes the water outlet mechanism 300 to form a sealed water channel 301. After being squeezed by the transmission part 201, the elastic diaphragm 400 deforms in the direction of the concave surface of the diaphragm. The transmission part 201 of the drive mechanism 200 moves back and forth, continuously squeezing the elastic diaphragm 400, causing the elastic diaphragm 400 to compress the space of the water storage cavity 302, increasing the water pressure in the water storage cavity 302, thereby forcing water out of the water outlet mechanism 300.

[0038] According to the embodiment of the present invention, the water pump 1 for a dental irrigator uses an elastic diaphragm 400 constructed by a water outlet mechanism 300 to seal and limit the water outlet 301. The water flow is always within the water outlet 301 sealed by the elastic diaphragm 400. The elastic diaphragm 400 only deforms and does not move in position, thus providing better sealing performance compared to the piston rod structure of the dental irrigator pump 1 in related technologies. Moreover, the elastic diaphragm 400 uses the air pressure change within the water outlet 301 to expel water. Since its position does not move, it will not wear against the side wall of the water outlet 301, thereby improving its service life.

[0039] Furthermore, utilizing the elastic deformation capability of the elastic diaphragm 400, the transmission part 201 of the drive mechanism 200 generates and releases pressure on the elastic diaphragm 400. A water storage cavity 302 is formed on one side of the water channel 301. The elastic diaphragm 400 continuously squeezes and releases the space inside the water storage cavity 302. One side of the elastic diaphragm 400 is constructed as a concave elastic diaphragm surface and the other side is constructed as a convex elastic diaphragm surface. A larger water storage cavity 302 space can be formed inside the concave elastic diaphragm surface. During the process of the transmission part 201 squeezing the elastic diaphragm 400, the space inside the water channel 301 can produce a larger range of changes, resulting in a larger water outlet pressure.

[0040] Therefore, the water pump 1 for the oral irrigator according to the present invention has advantages such as good sealing performance, high water pressure, and long service life.

[0041] In some specific embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the water outlet mechanism 300 has a diaphragm connector 31 on the side facing the drive mechanism 200. The interior of the diaphragm connector 31 is connected to the water storage chamber 302, and the outer ring of the elastic diaphragm 400 is sealed around the diaphragm connector 31.

[0042] Specifically, the outer ring of the elastic diaphragm 400 surrounds and seals the outer periphery of the elastic diaphragm connector 31. The elastic diaphragm connector 31 extends towards the drive mechanism 200, making the elastic diaphragm 400 easier to assemble. Furthermore, a larger space is created inside the elastic diaphragm connector 31, thereby increasing the volume of the water storage chamber 302. Because the elastic diaphragm 400 has a certain elastic deformation capability, it provides good sealing performance when fitted onto the elastic diaphragm connector 31. No other sealing components are required, resulting in fewer parts and a simpler structure.

[0043] Furthermore, such as Figure 3 As shown, the elastic diaphragm 400 includes a mounting ring 410 and a cup portion 420. The mounting ring 410 surrounds and seals the elastic diaphragm connector 31. The cup portion 420 is connected to the radial center of the mounting ring 410. When no deformation occurs, the cup portion 420 forms a concave elastic diaphragm surface on one side and a convex elastic diaphragm surface on the other side. The transmission part 201 is adapted to abut against the cup portion 420 and cause the cup portion 420 to deform in the direction of the water storage cavity 302.

[0044] The mounting ring 410 forms a flange radially outward, resulting in a thicker outer periphery of the diaphragm connector 31, thus improving the sealing reliability between diaphragm connectors 31. A cup portion 420 is formed at the radial center of the elastic diaphragm 400. One side of the concave surface of the cup portion 420 closes the water channel 301, while the elastic convex surface is stopped by the transmission part 201. The cup portion 420 forms a bowl-shaped structure, providing better elastic deformation capability and making it easier to deform towards the water storage cavity 302 when compressed by the transmission part 201.

[0045] Furthermore, such as Figure 3 As shown, the outer circumferential surface of the diaphragm connector 31 is constructed with multiple axially arranged fir tree clips 32. The outer diameter of each fir tree clip 32 gradually increases towards the water channel 301. The inner circumferential surface of the mounting ring 410 is press-fitted with the fir tree clip 32 to form a seal. The fir tree clips 32 form a ratchet structure, which can better fit with the inner circumference of the mounting ring 410. The inner circumferential surface of the mounting ring 410 is more easily deformed by the compression of the fir tree clips 32, thereby forming a better seal.

[0046] In some specific embodiments of this utility model, such as Figure 2As shown, the water outlet mechanism 300 includes a pump body 310, an inlet connector 320, and an outlet connector 330. A water channel 301 is formed in the pump body 310 and has an inlet water channel 303 and an outlet water channel 304, both of which communicate with a water storage chamber 302. The inlet connector 320 is installed on the radial side of the pump body 310 and connected to the inlet water channel 303. The outlet connector 330 is installed on the side of the pump body 310 away from the drive mechanism 200 and connected to the outlet water channel 304.

[0047] The inlet connector 320 is connected to the radial side of the pump body 310, and the outlet connector 330 is located on the axial side of the pump body 310. The inlet connector 320 forms an inlet, and the outlet connector 330 forms an outlet. A water channel 301 is formed between the inlet and outlet of the pump body 310. The inlet water channel 303 and the outlet water channel 304 of the water channel 301 are respectively connected to the water storage chamber 302. Water flowing in from the inlet connector 320 enters the water storage chamber 302 and then flows out from the outlet connector 330. The water storage chamber 302 is continuously squeezed by the elastic diaphragm 400, and water in the water storage chamber 302 is continuously squeezed out from the outlet connector 330, while water flows in from the inlet connector 320, giving the water outlet mechanism 300 a continuous water output function.

[0048] Furthermore, such as Figure 2 and Figure 4 As shown, the pump body 310 includes a pump head 311 and an end cap 312. An inlet connector 320 is installed on the radial side of the pump head 311, and an outlet connector 330 is installed on the side of the pump head 311 away from the elastic diaphragm 400. The end cap 312 is installed on the side of the pump head 311 opposite to the outlet connector 330. When the elastic diaphragm 400 is not deformed, the end cap 312 fits against the side of the elastic diaphragm 400 opposite to the water channel 301. The end cap 312 has a through hole suitable for the passage of the transmission part 201.

[0049] The pump head 311 and end cap 312 are located on opposite sides of the elastic diaphragm 400, thus the elastic diaphragm 400 is sandwiched between the pump head 311 and the end cap 312. The end cap 312 applies pressure to the elastic diaphragm 400, making it difficult for water to flow out of the pump body 310, further improving the sealing performance of the pump body 310. Furthermore, the end cap 312 and the pump head 311 completely enclose the elastic diaphragm 400 internally, and the transmission part 201 can apply pressure to the elastic diaphragm 400 through the through hole of the end cap 312, causing the elastic diaphragm 400 to deform.

[0050] Furthermore, such as Figure 3 As shown, a water cavity concave surface 313 is formed on the surface of the pump head 311 facing the elastic diaphragm 400. A water storage cavity 302 is formed between the water cavity concave surface 313 and the elastic diaphragm concave surface of the elastic diaphragm 400. The transmission part 201 is adapted to stop the elastic diaphragm 400 and cause the elastic diaphragm 400 to undergo elastic deformation towards the water cavity concave surface 313.

[0051] The concave surface 313 of the water cavity is a concave arc surface. After the transmission part 201 squeezes the elastic diaphragm 400, the elastic diaphragm 400 is attached to the concave arc surface and supported by the concave arc surface. The shape of the concave arc surface better adapts to the movement of the transmission part 201. The transmission part 201 squeezes the water in the water storage cavity 302 in the direction of the concave arc surface, so that the space change of the water storage cavity 302 is maximized and the pressure of the water flow during extrusion is increased.

[0052] In some specific embodiments of this utility model, such as Figure 2 As shown, the drive mechanism 200 includes a water pump motor 210 and a transmission mechanism 220. The water pump motor 210 is installed inside the water pump housing 100. The transmission mechanism 220 is connected to the water pump motor 210 in a transmission manner, and a transmission part 201 is formed at one end of the transmission mechanism 220.

[0053] Driven by the water pump motor 210, power is transmitted to the transmission part 201 of the transmission mechanism 220. The transmission part 201 reciprocates within the through hole of the end cover 312 of the pump body 310, squeezing water out of the water storage chamber 302 in the direction of water outlet. The water pump motor 210, transmission mechanism 220, and pump body 310 are arranged sequentially along the length of the housing. After power is transmitted to the transmission part 201, the transmission part 201 applies pressure to the elastic diaphragm 400.

[0054] Furthermore, such as Figure 2 As shown, the transmission mechanism 220 includes a driving gear 221, a driven gear 222, and a transmission cover 224. The driving gear 221 is connected to the motor shaft of the water pump motor 210. The driven gear 222 meshes with the driving gear 221, and a cam 223 is constructed on one side of the driven gear 222. The transmission cover 224 is installed inside the water pump housing 100, and the cam 223 is drivingly connected to the transmission cover 224. One end of the transmission cover 224 is connected to a transmission part 201.

[0055] Driven by the water pump motor 210 and the transmission mechanism 220, the cam 223 performs circular motion, and the cam 223 drives the transmission cover 224 to perform smooth reciprocating motion. Through the cooperation between the transmission cover 224 and the cam 223, the transmission cover 224 converts the circular motion of the cam 223 into linear motion, ensuring stability in the transmission process, reducing energy loss during the transmission of the cam 223, and reducing the generation of vibration and noise.

[0056] Simultaneously, the driving gear 221 connects to the water pump motor 210 and drives the driven gear 222. The central axes of the driving gear 221 and the driven gear 222 are perpendicular to each other, thereby changing the rotation direction of the water pump motor 210 and realizing a change in the transmission direction. During the rotation of the transmission gear, the transmission cover 224 moves in conjunction with the cam 223, limiting the range of reciprocating motion of the transmission part 201, causing the water outlet mechanism 300 to continuously squeeze out water flow. This makes the movement of the transmission cover 224 and its connected transmission part 201 more stable, ensuring consistent water flow output and guaranteeing the reliable operation of the water irrigator pump 1. The driving gear 221 meshes with the driven gear 222, and the cam 223 of the driven gear 222 drives the transmission part 201 of the transmission cover 224 to move along a predetermined path. This makes the overall movement of the water irrigator pump 1 more coordinated, thereby achieving efficient and stable water flow output and providing a better rinsing experience.

[0057] The following describes a water flosser 2 according to an embodiment of the present invention.

[0058] The oral irrigator 2 according to an embodiment of the present invention includes: an oral irrigator water pump 1 according to the above embodiment of the present invention.

[0059] The oral irrigator 2 according to the present invention has advantages such as good sealing performance, high water pressure, and long service life by using the oral irrigator water pump 1 according to the above embodiment of the present invention.

[0060] The water pump 1 of the oral irrigator according to the embodiments of the present invention and other components and operations of the oral irrigator are known to those skilled in the art and will not be described in detail here.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An oral irrigator water pump, characterized by, The utility model provides a water pump, comprising: a water pump housing; a drive mechanism mounted in the water pump housing, the drive mechanism being configured with a transmission part; a water outlet mechanism, a side of the water outlet mechanism facing the drive mechanism being connected with an elastic diaphragm that encloses the water outlet mechanism, the elastic diaphragm and an interior of the water outlet mechanism together defining a water channel, a side of the water channel facing the elastic diaphragm forming a water storage cavity; wherein the elastic diaphragm protrudes in a direction facing the drive mechanism, the transmission part of the drive mechanism being adapted to abut against the elastic diaphragm and cause the elastic diaphragm to deform towards the water storage cavity.

2. The oral irrigator water pump of claim 1, wherein, A side of the water outlet mechanism facing the drive mechanism is configured with an elastic diaphragm joint, an interior of the elastic diaphragm joint being in communication with the water storage cavity, an outer ring of the elastic diaphragm being sealed to the elastic diaphragm joint.

3. The oral irrigator water pump of claim 2, wherein, The elastic diaphragm comprises: a mounting ring, the mounting ring being sealed to the elastic diaphragm joint; a leather cup, the leather cup being connected at a radial center of the mounting ring, a side of the leather cup when not deformed forming an elastic diaphragm concave surface and the other side forming an elastic diaphragm convex surface, the transmission part being adapted to abut against the leather cup and cause the leather cup to deform towards the water storage cavity.

4. The oral irrigator water pump of claim 3, wherein, An outer circumferential surface of the elastic diaphragm joint is configured with a plurality of axially arranged fir tree buckles, an outer diameter of each of the fir tree buckles gradually increasing in a direction of the water channel, an inner circumferential surface of the mounting ring being interference fit with the fir tree buckles to form a seal.

5. The oral irrigator water pump of claim 1, wherein, The water outlet mechanism comprises: a pump body, the water channel being formed in the pump body and having a water inlet channel and a water outlet channel, the water inlet channel and the water outlet channel both being in communication with the water storage cavity; a water inlet joint, the water inlet joint being mounted on a radial side of the pump body and connected to the water inlet channel; a water outlet joint, the water outlet joint being mounted on a side of the pump body away from the drive mechanism and connected to the water outlet channel.

6. The oral irrigator water pump of claim 5, wherein, The pump body comprises: a pump head, the water inlet joint being mounted on a radial side of the pump head, the water outlet joint being mounted on a side of the pump head away from the elastic diaphragm along an axis; an end cover, the end cover being mounted on a side of the pump head away from the water outlet joint, the end cover being fitted to a side of the elastic diaphragm away from the water channel when the elastic diaphragm is not deformed, the end cover being configured with a through hole adapted for the transmission part to pass through.

7. The oral irrigator water pump of claim 6, wherein, A surface of the pump head facing the elastic diaphragm forms a water cavity concave surface, the water cavity concave surface and an elastic diaphragm concave surface of the elastic diaphragm forming the water storage cavity, the transmission part being adapted to abut against the elastic diaphragm and cause the elastic diaphragm to elastically deform towards the water cavity concave surface.

8. The oral irrigator water pump of claim 1, wherein, The drive mechanism comprises: a water pump motor, the water pump motor being mounted in the water pump housing; a transmission mechanism, the transmission mechanism being in transmission connection with the water pump motor, the transmission part being formed at one end of the transmission mechanism.

9. The oral irrigator water pump of claim 8, wherein, The transmission mechanism comprises: a driving gear, the driving gear being connected to a motor shaft of the water pump motor; a driven gear, the driven gear being in meshing connection with the driving gear, a side of the driven gear being configured with a cam; A transmission cover is installed in the water pump housing, the cam is in transmission connection with the transmission cover, one end of the transmission cover is connected with the transmission part.

10. An oral irrigator characterized by, Comprising: A water pump for an oral irrigator according to any one of claims 1-9.

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