Water pump assembly and oral cavity cleaning device

Abstract

The utility model discloses a water pump assembly and an oral cavity cleaning device. The water pump assembly comprises a pump body, a water inlet and outlet assembly and a driving assembly, wherein the water inlet and outlet assembly is arranged at an opening of the second end of the pump body, and the driving assembly is used for driving the pump body to pump water. A water inlet and outlet valve body is arranged in the water inlet and outlet assembly, the water inlet and outlet valve body comprises a water inlet valve piece and a water outlet valve piece which are integrally formed and coaxially arranged, a pump cavity is formed in the pump body, and a water inlet channel and a water outlet channel which are coaxially arranged are arranged in the water inlet and outlet assembly; in the water pumping process, the water inlet valve piece is used for communicating the pump cavity with the water inlet channel, the water outlet valve piece is used for separating the pump cavity from the water outlet channel, in the water pumping process, the water outlet valve piece is used for communicating the pump cavity with the water outlet channel, and the water inlet valve piece is used for separating the pump cavity from the water inlet channel. The water inlet valve piece and the water outlet valve piece are integrally arranged, water inlet and water outlet of the water pump are achieved without two one-way valves, occupied space is small, and therefore miniaturization design of the water pump is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump field especially relates to a water pump assembly and oral cleaning device. BACKGROUND

[0002] Water pumps are widely used in oral irrigators, floor washing machines, dishwashers, children's toys, food and beverage equipment, medical equipment, inflators, landscape fountains, glass cleaning agents, processing machines, cooling equipment, and other fields.

[0003] Many existing water pumps of oral irrigators have separate water inlet channels and water outlet channels, which require two one-way valves to realize water inlet and water outlet of the water pump. Such one-way valve groups are not conducive to miniaturization design of the water pump, not only occupy a large space, but also have high cost. SUMMARY

[0004] The utility model discloses a water pump assembly and oral cleaning device to solve the technical problem that split type valve body is not conducive to miniaturization design of the water pump.

[0005] The utility model provides a kind of water pump assembly, including pump body, the water inlet and outlet assembly of the opening of the second end of the pump body is set, and the driving assembly for driving pump body to pump or pump water;The water inlet and outlet valve body is provided in the water inlet and outlet assembly, the water inlet and outlet valve body includes integrally formed and coaxially arranged water inlet valve piece and water outlet valve piece, the pump cavity is in the pump body, the water inlet channel and water outlet channel are coaxially arranged in the water inlet and outlet assembly;

[0006] In the process of pumping, the water inlet valve piece is used to connect the pump cavity with the water inlet channel, and the water outlet valve piece is used to block the pump cavity and the water outlet channel. In the process of pumping, the water outlet valve piece is used to connect the pump cavity with the water outlet channel, and the water inlet valve piece is used to block the pump cavity and the water inlet channel.

[0007] Further, the water inlet valve piece surrounds the water outlet valve piece, and the water inlet channel surrounds the water outlet channel.

[0008] Alternatively,

[0009] The water outlet valve piece surrounds the water inlet valve piece, and the water outlet channel surrounds the water inlet channel.

[0010] Further, the water outlet valve piece includes at least two tensioning parts connected to the water inlet valve piece, the water inlet valve piece surrounds the water outlet valve piece and has elasticity, the side edges of the tensioning parts are respectively connected to the side edges of adjacent tensioning parts, the tensioning parts can be opened or closed, and the water outlet channel surrounds the water inlet channel.

[0011] Further, one end of the tensioning part is connected to the water inlet valve, and the end of the tensioning part is arc-shaped, and all the ends of the tensioning part are connected to form a circle; the other end of the tensioning part is folded in the direction of the axis of the circle.

[0012] Further, the number of the tensioning parts is greater than or equal to two.

[0013] Further, the water inlet valve comprises a connecting body connected to the tensioning part and an elastic baffle connected to the connecting body, and the water inlet and outlet assembly comprises a pipe body arranged between the water inlet channel and the water outlet channel, and the connecting body is tightly pressed between the pump body and the pipe body.

[0014] Further, the pump body further comprises a pump shell, a pump membrane end cover connected to the first end of the pump shell, and a pump membrane arranged between the pump membrane end cover and the pump shell, and the pump shell and the pump membrane define the pump cavity; the pump membrane is provided with a skirt, and the end of the pump shell connected to the pump membrane end cover is provided with a skirt groove, and the pump membrane end cover extrudes and fixes the skirt in the skirt groove.

[0015] Further, the water pump assembly further comprises a first sealing member arranged between the pump shell and the water inlet and outlet assembly; the water pump assembly further comprises a water inlet pipe in communication with the water inlet channel in the water inlet and outlet assembly, and a second sealing member is arranged between the water inlet pipe and the water inlet and outlet assembly.

[0016] Further, the water pump assembly further comprises a first sealing member arranged between the pump shell and the water inlet and outlet assembly; the water pump assembly further comprises a water inlet pipe in communication with the water inlet channel in the water inlet and outlet assembly, and a second sealing member is arranged between the water inlet pipe and the water inlet and outlet assembly.

[0017] The utility model also provides a kind of oral cavity cleaning device, comprising the water pump assembly described in above-mentioned scheme.

[0018] The utility model has the advantages that: by being provided with water inlet and outlet assembly on pump body, water inlet and outlet valve body are integrally arranged in water inlet and outlet assembly, the process of pumping and pumping water is realized by adjusting the action between water inlet and outlet valve body and pump cavity to make water inlet and outlet valve body communicate or block water inlet and outlet channel.Specifically, when pumping, water inlet valve communicates pump cavity with water inlet channel, and water outlet valve blocks pump cavity with water outlet channel; when pumping, water outlet valve communicates pump cavity with water outlet channel, and water inlet valve blocks pump cavity with water inlet channel.Because water inlet valve and water outlet valve are integrally arranged, two one-way valves are not needed to realize water inlet and outlet of water pump, and the space occupied is smaller, so it is beneficial to the miniaturization design of water pump, and the cost is lower. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the water pump assembly of this utility model in the pumping state.

[0020] Figure 2 This is a cross-sectional view of the water pump assembly of this utility model in the pumping state.

[0021] Figure 3 This is a schematic diagram of the inlet and outlet water valve body according to Embodiment 1 of this utility model.

[0022] Figure 4 This is a schematic diagram of the inlet and outlet water valve body according to Embodiment 2 of this utility model.

[0023] Figure 5 This is a schematic diagram of the inlet and outlet water valve body of Embodiment 3 of this utility model.

[0024] Figure 6 This is an exploded view of the water pump assembly of this utility model. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through the indirect connection of intermediate medium, can be the communication inside two elements.For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them.Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] The utility model will be further described in detail by specific implementation ways combined with the drawings.

[0031] Example one:

[0032] The water pump assembly provided in the embodiment comprises a pump body 4, an inlet and outlet water assembly 43 arranged at the opening of the second end of the pump body 4, and a driving assembly 5 for driving the pump body 4 to pump water or pump water;The inlet and outlet water assembly 43 is provided with an inlet and outlet water valve body, the inlet and outlet water valve body comprises an integrally formed and coaxially arranged water inlet valve 1 and water outlet valve 2, the pump body 4 has a pump cavity 45, and the inlet and outlet water assembly 43 has coaxially arranged water inlet channel 431 and water outlet channel 432;

[0033] In the water pumping process, the water inlet valve 1 is used to connect the pump cavity 45 and the water inlet channel 431, and the water outlet valve 2 is used to block the pump cavity 45 and the water outlet channel 432, in the water pumping process, the water outlet valve 2 is used to connect the pump cavity 45 and the water outlet channel 432, and the water inlet valve 1 is used to block the pump cavity 45 and the water inlet channel 431.

[0034] In the embodiment, the water inlet and outlet assembly 43 is arranged on the pump body, the water inlet and outlet valve body in the water inlet and outlet assembly 43 is integrally arranged, the water inlet and outlet valve body is communicated or blocked by adjusting the action between the water inlet and outlet valve body and the pump cavity 45, thereby realizing the process of pumping water and pumping water. Specifically, when pumping water, the water inlet valve 1 communicates the pump cavity 45 and the water inlet channel 431, and the water outlet valve 2 blocks the pump cavity 45 and the water outlet channel 432; when pumping water, the water outlet valve 2 communicates the pump cavity 45 and the water outlet channel 432, and the water inlet valve 1 blocks the pump cavity 45 and the water inlet channel 431. Since the water inlet valve 1 and the water outlet valve 2 are integrally arranged, two one-way valves are not required to realize water inlet and water outlet of the water pump, the occupied space is small, and thus the water pump is beneficial to miniaturization design and has low cost.

[0035] In the embodiment, the water inlet channel 431 surrounds the water outlet channel 432. The water inlet valve 1 includes a fixedly connected connecting body 11 and an elastic blocking edge 12, the connecting body 11 and the elastic blocking edge 12 are annular, the diameter of the elastic blocking edge 12 is greater than that of the connecting body 11, and the elastic blocking edge 12 surrounds the connecting body 11. The elastic blocking edge 12 can be folded axially to both ends on the connecting body 11, the elastic blocking edge 12 is folded to one end for water flow, and the elastic blocking edge 12 is folded to the other end for blocking water flow, thereby achieving the purpose of controlling water inlet.

[0036] The water outlet valve 2 is fixedly connected to one end of the water inlet valve 1, the water inlet valve 1 surrounds the water outlet valve 2, and the water inlet valve 1 and the water outlet valve 2 are coaxial. The water outlet valve 2 includes four elastic tensioning portions 21, the two side edges of each tensioning portion 21 are fixedly connected to the side edges of adjacent tensioning portions 21, the four tensioning portions 21 are connected to the connecting body 11 after being surrounded, and the central axis of the four tensioning portions 21 after being surrounded coincides with the central axis of the water inlet valve 1. One end of the tensioning portion 21 connected to the connecting body 11 is arc-shaped, the four tensioning portions 21 after being surrounded make the one end of the water outlet valve 2 connected to the water inlet valve 1 form a circle with the same diameter as the inner ring of the connecting body 11 and communicate with the connecting body 11. The end of the tensioning portion 21 away from the connecting body 11 is gradually folded inward, the folding line is in the same direction as the axis of the circle, and the end of the tensioning portion 21 away from the connecting body 11 after being folded can be attached together to form a cross shape or can not be attached together. When the tensioning portions 21 are attached together, the tensioning portions 21 are in a closed state, the middle of the water outlet valve 2 is blocked, and water flow is blocked; when the tensioning portions 21 are not attached together, the tensioning portions 21 are in an open state, the middle of the water outlet valve 2 is opened, a water flow channel is formed for water flow, thereby achieving the purpose of controlling water outlet.

[0037] In actual use, the water inlet valve 1 and the water outlet valve 2 can be switched according to the change of the ambient pressure, for example, when pumping water, the water inlet valve 1 is folded to the end where water can flow, and the water outlet valve 2 is closed, so as to realize pumping water only; when pumping water, the water inlet valve 1 is folded to the end where water cannot flow, and the water outlet valve 2 is opened, so as to realize pumping water only.

[0038] By setting the water inlet valve 1 and the water outlet valve 2 as one, the elastic water inlet valve 1 can be attached to or separated from the water inlet channel through elastic deformation, so as to achieve the purpose of opening or blocking the water inlet channel, and the water outlet valve 2 with the tensioning part 21 can be opened or closed through the cooperation between the adjacent tensioning parts 21, so as to achieve the purpose of opening or blocking the water outlet channel. Since the water inlet valve 1 and the water outlet valve 2 are designed as one, there is no connection, so as to realize the functions of water inlet and water outlet of the water inlet and outlet valve body, and the connection part is not easy to cause sealing failure due to long-term wear or assembly error, thereby effectively improving the sealing performance of the water pump assembly.

[0039] In the embodiment, the water inlet channel 431 surrounds the water outlet channel 432, and in other embodiments, the water outlet channel 432 can surround the water inlet channel 431, and correspondingly, the water outlet valve 2 surrounds the water inlet valve 1. The water inlet valve 1 or the water outlet valve 2 is suitable for any kind of one-way valve, and the water inlet and outlet assembly 43 can be set as middle outlet and two sides inlet or middle inlet and two sides outlet, and the direction can be changed.

[0040] Embodiment two:

[0041] The difference between the embodiment and the embodiment one is that the number of the tensioning part 21 in the embodiment is two, and the two tensioning parts 21 are closed at the end away from the connecting body 11 to form a one-shaped tensioning part 21. The one-shaped tensioning part 21 can also be attached and not attached, so as to achieve the opening and blocking state of the water outlet valve 2.

[0042] Embodiment three:

[0043] The difference between the embodiment and the embodiment one is that the number of the tensioning part 21 in the embodiment is three, and the three tensioning parts 21 are closed at the end away from the connecting body 11, and the included angle between the adjacent tensioning parts 21 at the end is 60°. The one-shaped tensioning part 21 can also be attached and not attached, so as to achieve the opening and blocking state of the water outlet valve 2.

[0044] In other embodiments, the number of the tensioning part 21 can also be five, six or more, and is not limited to two, three or four, as long as the water inlet valve body can realize the functions in the application.

[0045] Embodiment four:

[0046] In the embodiment, the water pump assembly comprises a housing 3, a pump body 4 arranged in the housing 3, and a driving assembly 5 for driving the pump body 4 to pump water or draw water. The pump body 4 comprises a pump shell 41, a pump membrane end cover 42 connected to a first end of the pump shell 41, and a pump membrane 44 arranged between the pump membrane end cover 42 and the pump shell 41. The pump shell 41 and the pump membrane 44 define a pump cavity 45. An inlet-outlet water assembly 43 is also arranged in the housing 3 and connected to a second end of the pump shell 41. The inlet-outlet water assembly 43 comprises a pipe body arranged between an inlet channel 431 and an outlet channel 432. The connecting body 11 is tightly pressed between the pump shell 41 and the pipe body. The inlet-outlet water valve body is used to switch between the two states of the pump cavity 45 being communicated with the inlet channel 431 in the inlet-outlet water assembly 43 or the pump cavity 45 being communicated with the outlet channel 432 in the inlet-outlet water assembly 43. The inlet valve 1 is arranged between the pump shell 41 and the inlet-outlet water assembly 43 and used to open or block the inlet channel 431. The outlet valve 2 is arranged in the outlet channel 432 in the inlet-outlet water assembly 43 and used to open or block the outlet channel 432.

[0047] In the embodiment, the driving assembly 5 drives the pump membrane 44 to move towards or away from the pump cavity 45, so as to change the pressure in the pump cavity 45, and then the inlet-outlet water valve body opens the outlet channel 432 or the inlet channel 431, so as to realize the water pumping or water drawing of the water pump. The outlet valve 2 is opened in the water pumping state and blocked in the water drawing state by the opening or closing of the tensioning part 21, so as to block the outlet channel 432. Specifically, when the water is drawn, the driving assembly 5 drives the pump membrane 44 to move away from the pump cavity 45. At this time, the volume of the pump cavity 45 becomes larger, the pressure in the pump cavity 45 becomes smaller, the tensioning part 21 is closed, the outlet valve 2 is blocked, the outlet of the pump cavity 45 and the outlet channel 432 is blocked, and the inlet valve 1 is away from the inlet of the pump cavity 45 and the inlet channel 431, so that the external water can flow into the pump cavity 45 from the inlet through the inlet channel 431. When the water is pumped, the driving assembly 5 drives the pump membrane 44 to move towards the pump cavity 45. At this time, the volume of the pump cavity 45 becomes smaller, the pressure in the pump cavity 45 becomes larger, the tensioning part 21 is opened, the outlet valve 2 is opened, the outlet of the pump cavity 45 and the outlet channel 432 is opened, and the inlet valve 1 returns to the position of the inlet of the pump cavity 45 and the inlet channel 431, so as to block the inlet and realize the water pumping function.

[0048] In the embodiment, the pump shell 41 and the pump membrane end cover 42 can be connected together by means of bolts, welding, clamping or gluing. The pump shell 41 and the inlet-outlet water assembly 43 can be connected together by means of bolts, welding, clamping or gluing.

[0049] The water pump assembly of the embodiment can be used in a water pick, a floor washing machine, a dishwasher, a children's toy, a food and beverage apparatus, a medical apparatus, an air pump, a landscape fountain, a glass cleaner, a processing machine tool, a cooling device, and the like.

[0050] Embodiment five:

[0051] In the embodiment, the water inlet and outlet valve body is in interference fit with the pump shell 41 and the water inlet and outlet assembly 43. The purpose of this arrangement is to strengthen the sealing between the water inlet and outlet valve body and the pump shell 41 and the water inlet and outlet assembly 43, so that the water inlet and outlet valve body and the pump shell 41 and the water inlet and outlet assembly 43 can be more tightly connected, thereby enabling the water inlet and outlet valve body to provide better sealing.

[0052] Embodiment six:

[0053] On the basis of embodiments one to five, the pump membrane 44 is provided with a skirt 441, and the end of the pump shell 41 connected with the pump membrane end cover 42 is provided with a skirt groove 411, and the pump membrane end cover 42 extrudes and fixes the skirt 441 in the skirt groove 411. In the embodiment, the skirt 441 is extruded and fixed in the skirt groove 411 by the pump membrane end cover 42, so that when the driving assembly 5 drives the pump membrane 44 to move and change the volume of the pump cavity 45, the skirt 441 can remain in a static state, and the pump membrane 44 can be arranged not to rub against the inner side wall of the pump shell 41, overcoming the situation that the conventional pump membrane 44 is damaged and leaks due to rubbing against the inner side wall of the pump shell 41, and further improving the sealing.

[0054] Further, the pump membrane 44 and the skirt 441 are connected through a connecting arm 442, the connecting arm 442 includes a connecting portion 4421 connected with the skirt 441 and a bent portion 4422 connected with the pump membrane 44, and the pump membrane 44 has a gap with the inner side wall of the pump shell 41. Through this arrangement, the pump membrane 44 can be movably connected relative to the inner side wall of the pump cavity 45 without rubbing, thereby improving the service life of the pump membrane 44.

[0055] Further, the pump membrane end cover 42 has an annular protrusion 421 facing the skirt groove 411, and the connecting portion of the skirt 441 and the connecting arm 442 is provided with a connecting platform 443, and the annular protrusion 421 can contact and abut against the connecting platform 443 in the skirt groove 411.

[0056] Embodiment seven:

[0057] The water pump assembly of the embodiment further includes a first sealing member 46 arranged between the pump shell 41 and the water inlet and outlet assembly 43, thereby improving the sealing between the pump shell 41 and the water inlet and outlet assembly 43.

[0058] Further, a first sealing groove 433 is arranged between the water inlet and outlet assembly 43 and the pump shell 41, and the first sealing member 46 is arranged in the first sealing groove 433 in an interference fit, so as to improve the sealing between the water inlet and outlet assembly 43 and the pump shell 41.

[0059] Embodiment eight

[0060] The water pump assembly of the present application further comprises a water inlet pipe 47 which is in communication with the water inlet channel 431 in the water inlet and outlet assembly 43, and a second sealing member 48 is arranged between the water inlet pipe 47 and the water inlet and outlet assembly 43, so as to improve the sealing between the water inlet pipe 47 and the water inlet and outlet assembly 43.

[0061] Further, a second sealing groove 471 is arranged between the water inlet pipe 47 and the water inlet channel 431, and the second sealing member 48 is arranged in the second sealing groove 471 in an interference fit, so as to improve the sealing between the water inlet pipe 47 and the water inlet channel 431.

[0062] Embodiment nine

[0063] The driving assembly 5 of the present application comprises a driving motor 51 arranged in the shell 3, and a plunger 52 which is connected at one end to the output end of the driving motor 51 and at the other end to the pump membrane 44, for driving the pump membrane 44 to move towards or away from the pump shell 41. Specifically, the driving motor 51 drives the plunger 52 to move towards or away from the pump shell 41, so that the pump membrane 44 can move towards or away from the pump shell 41, thereby changing the volume of the pump cavity 45, so that the pressure of the pump cavity 45 is changed, realizing the change of the state of pumping or pumping water.

[0064] Further, the driving assembly 5 further comprises a connecting gear 53 connected to the output end of the driving motor 51, a planar gear 54 which is journalled in the shell 3 and meshes with the connecting gear 53, an eccentric boss 55 arranged on the planar gear 54, and a connecting rod 56 which is sleeved on the eccentric boss 55; one end of the connecting rod 56 away from the eccentric boss 55 is connected to the plunger 52. Specifically, the driving motor 51 can be rotated to rotate the connecting gear 53, and then the eccentric boss 55 on the planar gear 54 is rotated, realizing the movement of the plunger 52 towards or away from the pump cavity 45.

[0065] In other embodiments, the driving motor 51 can also be arranged as a linear motor, and the forward or backward movement of the pump membrane 44 is realized by the linear motion of the driving motor 51. The hole of the connecting rod 56 matched with the planar gear 54 can also be changed to a runway type, and the connecting member between the connecting rod 56 and the plunger 52 can also be omitted, and the connecting rod 56 and the plunger 52 can be integrated into one part to realize the linear motion to push the pump membrane 44.

[0066] Embodiment ten

[0067] The pump membrane 44 provided by the embodiment is provided with a water pushing groove 444 on the end face facing the pump cavity 45, and compared with the mode that the end face of the pump membrane 44 facing the pump cavity 45 is provided as a plane, the water pushing groove 444 can reduce the water resistance, thereby reducing the energy consumption of the driving motor 51.

[0068] Embodiment eleven

[0069] The application also provides a water pick comprising the water pump assembly in the above-mentioned scheme. Through the water pump assembly, the water leakage prevention sealing performance of the water pick can be improved, the service life of the water inlet and outlet valve body and the pump membrane 44 is longer, the service life of the water pick is prolonged, the water inlet channel 431 and the water outlet channel 432 are integrated in the water inlet and outlet assembly 43, thereby the volume of the water pump assembly is reduced, and the space occupation of the water pick is reduced.

[0070] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "one example", "some examples", "exemplary", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application.

[0071] In the present specification, the illustrative description of the above-mentioned terms does not necessarily mean the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0072] The above is a further detailed description of the present application in combination with specific embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application.

Claims

1. A water pump assembly characterized by: The water pump assembly comprises a pump body, an inlet and outlet water assembly arranged at an opening of a second end of the pump body, and a driving assembly for driving the pump body to draw or pump water; the inlet and outlet water assembly is provided with an inlet and outlet water valve body, the inlet and outlet water valve body comprises an integrally formed and coaxially arranged water inlet valve piece and water outlet valve piece, the pump body is provided with a pump cavity, and the inlet and outlet water assembly is provided with coaxially arranged water inlet and outlet channels; During the water drawing process, the water inlet valve piece is used for connecting the pump cavity and the water inlet channel, and the water outlet valve piece is used for blocking the pump cavity and the water outlet channel; during the water pumping process, the water outlet valve piece is used for connecting the pump cavity and the water outlet channel, and the water inlet valve piece is used for blocking the pump cavity and the water inlet channel.

2. The water pump assembly of claim 1, wherein: The water inlet valve piece surrounds the water outlet valve piece, and the water inlet channel surrounds the water outlet channel. Alternatively, The water outlet valve piece surrounds the water inlet valve piece, and the water outlet channel surrounds the water inlet channel.

3. The water pump assembly of claim 1, wherein: The water outlet valve piece comprises at least two tensioning portions connected to the water inlet valve piece, the water inlet valve piece surrounds the water outlet valve piece and has elasticity; the two sides of each tensioning portion are connected to the sides of adjacent tensioning portions, the tensioning portions can be opened or closed, and the water outlet channel surrounds the water inlet channel.

4. The water pump assembly of claim 3, wherein: One end of each tensioning portion is connected to the water inlet valve piece, the end of each tensioning portion is arc-shaped, and the ends of all the tensioning portions are connected to form a circular shape; the other end of each tensioning portion is folded in the direction of the axis of the circular shape.

5. The water pump assembly of claim 3, wherein: The number of the tensioning portions is greater than or equal to two.

6. The water pump assembly of claim 3, wherein: The water inlet valve piece comprises a connecting body connected to the tensioning portions and an elastic blocking edge connected to the connecting body, the inlet and outlet water assembly comprises a pipe body arranged between the water inlet channel and the water outlet channel, and the connecting body is tightly pressed between the pump body and the pipe body.

7. The water pump assembly of claim 1, wherein: The pump body further comprises a pump shell, a pump membrane end cover connected to a first end of the pump shell, and a pump membrane arranged between the pump membrane end cover and the pump shell, the pump shell and the pump membrane define the pump cavity; the pump membrane is provided with a skirt, one end of the pump shell connected to the pump membrane end cover is provided with a skirt groove, and the pump membrane end cover extrudes and fixes the skirt in the skirt groove.

8. The water pump assembly of claim 7, wherein: The water pump assembly further comprises a first sealing member arranged between the pump shell and the inlet and outlet water assembly; the water pump assembly further comprises a water inlet pipe in communication with the water inlet channel in the inlet and outlet water assembly, and a second sealing member is arranged between the water inlet pipe and the inlet and outlet water assembly.

9. The water pump assembly of claim 7, wherein: The water pump assembly further comprises a housing, the pump body, the inlet and outlet water assembly, and the driving assembly are arranged in the housing, the driving assembly comprises a driving motor arranged in the housing and a plunger connected to one end of the output end of the driving motor and the other end of the plunger connected to the pump membrane and used for driving the pump membrane to move towards or away from the pump shell, the driving assembly further comprises a connecting gear connected to the output end of the driving motor, a plane gear shaft-connected in the housing and meshed with the gear, an eccentric boss arranged on the plane gear, and a connecting rod sleeved on the eccentric boss, and one end of the connecting rod away from the eccentric boss is connected to the plunger.

10. An oral cleaning device characterized by: The water pump assembly comprises any one of the water pump assemblies in claims 1-9.

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