Water pump assembly and oral cavity cleaning device

Abstract

The invention discloses a water pump assembly which comprises a pump body, a water inlet and outlet assembly arranged at an opening in the second end of the pump body, and a driving assembly used for driving the pump body to pump water or 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 present invention relates to the field of water pumps, and particularly to a water pump assembly and an oral cleaning device. Background Art

[0002] Water pumps are widely used in fields such as dental irrigators, floor washers, dishwashers, children's toys, food and beverage appliances, medical devices, inflatable pumps, landscape fountains, glass cleaners, processing machine tools, cooling equipment, etc.

[0003] In many existing dental irrigator water pumps, the water inlet channel and the water outlet channel are separately arranged, and two check valves are required to achieve the water inlet and water outlet of the water pump. Such a check valve group is not conducive to the miniaturization design of the water pump, not only occupying a relatively large space, but also having a high cost. Summary of the Invention

[0004] In order to solve the technical problem that the split valve body is not conducive to the miniaturization design of the water pump, the present invention provides a water pump assembly and an oral cleaning device.

[0005] The present invention provides a water pump assembly, including a pump body, a water inlet and outlet assembly with an opening arranged at the second end of the pump body, and a driving assembly for driving the pump body to pump water or discharge water; a water inlet and outlet valve body is arranged in the water inlet and outlet assembly, the water inlet and outlet valve body includes an integrally formed and coaxially arranged water inlet valve member and a water outlet valve member, a pump cavity is provided in the pump body, and a coaxially arranged water inlet channel and a water outlet channel are provided in the water inlet and outlet assembly;

[0006] During the water pumping process, the water inlet valve member is used to connect the pump cavity with the water inlet channel, and the water outlet valve member is used to block the pump cavity from the water outlet channel; during the water discharging process, the water outlet valve member is used to connect the pump cavity with the water outlet channel, and the water inlet valve member is used to block the pump cavity from the water inlet channel.

[0007] Further, the water inlet valve member surrounds the water outlet valve member, and the water inlet channel surrounds the water outlet channel;

[0008] Or,

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

[0010] Further, the water outlet valve member includes at least two tensioning parts connected to the water inlet valve member, the water inlet valve member surrounds the water outlet valve member and has elasticity; two sides of the tensioning part are respectively connected to the side edges of adjacent tensioning parts, the tensioning part 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 member, and this end of the tensioning part is arc-shaped. All the arc-shaped ends of the tensioning parts are connected to form a circle; the other end of the tensioning part is folded along the axial direction of the circle.

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

[0013] Further, the water inlet valve member includes a connecting body connected to the tensioning part and an elastic retaining edge connected to the connecting body. The water inlet and outlet assembly includes 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 includes a pump housing, a pump membrane end cover connected to the first end of the pump housing, and a pump membrane arranged between the pump membrane end cover and the pump housing. The pump housing and the pump membrane define the pump cavity; the pump membrane is provided with a skirt, and a skirt groove is arranged at one end of the pump housing connected to the pump membrane end cover. The pump membrane end cover presses and fixes the skirt in the skirt groove.

[0015] Further, the water pump assembly further includes a first seal arranged between the pump housing and the water inlet and outlet assembly; the water pump assembly further includes a water inlet pipe communicated with the water inlet channel in the water inlet and outlet assembly, and a second seal is arranged between the water inlet pipe and the water inlet and outlet assembly.

[0016] Further, it further includes a housing. The pump body, the water inlet and outlet assembly and the driving assembly are all arranged in the housing. The driving assembly includes a driving motor arranged in the housing, and a plunger with one end connected to the output end of the driving motor and the other end connected to the pump membrane and used to drive the pump membrane to move towards or away from the pump housing; the driving assembly further includes a connecting gear connected to the output end of the driving motor, a planar gear axially connected in the housing and meshed with the gear, an eccentric boss arranged on the planar gear, and a connecting rod sleeved on the eccentric boss; one end of the connecting rod far from the eccentric boss is connected to the plunger.

[0017] The present invention also provides an oral cleaning device, including the water pump assembly described in the above solution.

[0018] The beneficial effects of the present invention are as follows: By arranging the water inlet and outlet assembly on the pump body, the water inlet and outlet valve body in the water inlet and outlet assembly is integrally arranged. By adjusting the interaction between the water inlet and outlet valve body and the pump cavity, the water inlet and outlet valve body is used to connect or block the water inlet and outlet channels, so as to realize the process of pumping water and pumping. Specifically, when pumping water, the water inlet valve member connects the pump cavity and the water inlet channel, and the water outlet valve member blocks the pump cavity and the water outlet channel; when pumping water, the water outlet valve member connects the pump cavity and the water outlet channel, and the water inlet valve member blocks the pump cavity and the water inlet channel. Since the water inlet valve member and the water outlet valve member are integrally arranged, there is no need for two one-way valves to realize the water inlet and outlet of the water pump, and the occupied space is small. Therefore, it is beneficial to the miniaturization design of the water pump and the cost is low. Brief Description of the Drawings

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

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

[0021] Figure 3 This is a schematic structural diagram of the water inlet and outlet valve body of the first embodiment of the present invention.

[0022] Figure 4 This is a schematic structural diagram of the water inlet and outlet valve body of the second embodiment of the present invention.

[0023] Figure 5 This is a schematic structural diagram of the water inlet and outlet valve body of the third embodiment of the present invention.

[0024] Figure 6 This is an exploded view of the water pump assembly of the present invention. Detailed Description of the Invention

[0025] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0026] In the description of the present invention, 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. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0028] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly defined or limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0030] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0031] Embodiment 1:

[0032] A water pump assembly provided in this embodiment includes a pump body 4, a water inlet and outlet assembly 43 disposed at an opening at the second end of the pump body 4, and a driving assembly 5 for driving the pump body 4 to pump water or discharge water; a water inlet and outlet valve body is disposed in the water inlet and outlet assembly 43, and the water inlet and outlet valve body includes a water inlet valve member 1 and a water outlet valve member 2 which are integrally formed and coaxially arranged. The pump body 4 has a pump chamber 45, and the water inlet and outlet assembly 43 has a coaxially arranged water inlet passage 431 and a water outlet passage 432;

[0033] During the water pumping process, the water inlet valve member 1 is used to connect the pump chamber 45 and the water inlet passage 431, and the water outlet valve member 2 is used to block the pump chamber 45 and the water outlet passage 432. During the water discharging process, the water outlet valve member 2 is used to connect the pump chamber 45 and the water outlet passage 432, and the water inlet valve member 1 is used to block the pump chamber 45 and the water inlet passage 431.

[0034] In this embodiment, by providing a water inlet and outlet assembly 43 on the pump body, the water inlet and outlet valve body in the water inlet and outlet assembly 43 is integrally provided. By adjusting the interaction between the water inlet and outlet valve body and the pump chamber 45, the water inlet and outlet valve body is connected or blocked from the water inlet and outlet channels, thereby realizing the process of pumping water and pumping out water. Specifically, when pumping water, the inlet valve member 1 connects the pump chamber 45 and the inlet channel 431, and the outlet valve member 2 blocks the pump chamber 45 and the outlet channel 432; when pumping out water, the outlet valve member 2 connects the pump chamber 45 and the outlet channel 432, and the inlet valve member 1 blocks the pump chamber 45 and the inlet channel 431. Since the inlet valve member 1 and the outlet valve member 2 are integrally provided, there is no need for two check valves to realize the water inlet and outlet of the water pump, and the occupied space is small. Therefore, it is beneficial to the miniaturized design of the water pump and the cost is low.

[0035] In this embodiment, the inlet channel 431 surrounds the outlet channel 432. The inlet valve member 1 includes a connecting body 11 and an elastic edge 12 which are fixedly connected. Both the connecting body 11 and the elastic edge 12 are annular. The diameter of the elastic edge 12 is larger than that of the connecting body 11, and the elastic edge 12 surrounds the connecting body 11. The elastic edge 12 can axially fold towards both ends on the connecting body 11. When the elastic edge 12 folds towards one end, it is used for water flow, and when the elastic edge 12 folds towards the other end, it is used to block water flow, so as to achieve the purpose of controlling water inlet.

[0036] The outlet valve member 2 is fixedly connected to one end of the inlet valve member 1. The inlet valve member 1 surrounds the outlet valve member 2, and the inlet valve member 1 and the outlet valve member 2 are coaxial. The outlet valve member 2 includes four elastic tensioning parts 21. The two side edges of each tensioning part 21 are respectively fixedly connected to the side edges of the adjacent tensioning part 21. After the four tensioning parts 21 surround, they are connected to the connecting body 11. The central axis after the four tensioning parts 21 surround coincides with the central axis of the inlet valve member 1. One end of the tensioning part 21 connected to the connecting body 11 is arc-shaped. After the four tensioning parts 21 surround, the end of the outlet valve member 2 connected to the inlet valve member 1 forms a circle with the same inner diameter as the inner ring of the connecting body 11 and is connected to the connecting body 11. One end of the tensioning part 21 far from the connecting body 11 gradually folds inwards, and the folding line is in the same direction as the axis of the circle. After folding, one end of the tensioning part 21 far from the connecting body 11 can be attached together to form a cross shape, or may not be attached together. When the tensioning parts 21 are attached together, the tensioning parts 21 are in a closed state, and the middle of the outlet valve member 2 is blocked to prevent water flow; when the tensioning parts 21 are not attached together, the tensioning parts 21 are in an open state, and the middle of the outlet valve member 2 is opened to form a water flow channel for water flow, so as to achieve the purpose of controlling water outlet.

[0037] In actual use, the inlet valve member 1 and the outlet valve member 2 can switch states according to the change of the current ambient pressure. For example, when pumping water, the pressure is controlled to make the inlet valve member 1 fold towards the end where water can flow, and the outlet valve member 2 is closed, so that only water pumping without water pumping is achieved; when pumping water, the pressure is controlled to make the inlet valve member 1 fold towards the end that blocks water flow, and the outlet valve member 2 is opened, so that only water pumping without water pumping is achieved.

[0038] By integrating the inlet valve member 1 and the outlet valve member 2, the elastic inlet valve member 1 can fit or separate from the inlet channel through elastic deformation, so as to achieve the purpose of opening or blocking the inlet channel, while the outlet valve member 2 with the tension part 21 can be opened or closed through the cooperation between adjacent tension parts 21, so as to achieve the purpose of opening or blocking the outlet channel. Since the integrated design of the inlet valve member 1 and the outlet valve member 2 has no connection part, the functions of water inlet and outlet of the water inlet and outlet valve body are realized, and the connection part between the two is not easy to cause sealing failure due to long-term wear or assembly error, effectively improving the sealing performance of the water pump assembly.

[0039] In this embodiment, the inlet channel 431 surrounds the outlet channel 432. In other embodiments, it can also be that the outlet channel 432 surrounds the inlet channel 431. Correspondingly, the outlet valve member 2 surrounds the inlet valve member 1. The inlet valve member 1 or the outlet valve member 2 is applicable to any one-way valve, and the water inlet and outlet assembly 43 can be set to have water flowing out from the middle and into from both sides or water flowing into from the middle and out from both sides, just by changing the direction.

[0040] Embodiment Two:

[0041] The difference between this embodiment and Embodiment One is that the number of the tension parts 21 in this embodiment is two, and the ends of the two tension parts 21 far away from the connecting body 11 form a straight line after closing. The straight-line tension part 21 can also fit or not fit to achieve the open and blocked states of the outlet valve member 2.

[0042] Embodiment Three:

[0043] The difference between this embodiment and Embodiment One is that the number of the tension parts 21 in this embodiment is three, and the included angles between the adjacent ends of the three tension parts 21 far away from the connecting body 11 are all 60° after closing. The straight-line tension part 21 can also fit or not fit to achieve the open and blocked states of the outlet valve member 2.

[0044] In other embodiments, the number of the tension parts 21 can also be five, six or more, rather than being limited to two, three or four, as long as the functions of the water inlet valve body in this application can be realized.

[0045] Embodiment Four:

[0046] In this embodiment, the water pump assembly includes a housing 3, a pump body 4 disposed within the housing 3, and a drive assembly 5 for driving the pump body 4 to pump water or draw water. The pump body 4 includes a pump housing 41, a pump diaphragm end cover 42 connected to the first end of the pump housing 41, and a pump diaphragm 44 disposed between the pump diaphragm end cover 42 and the pump housing 41. The pump housing 41 and the pump diaphragm 44 define a pump chamber 45. The water inlet and outlet assembly 43 is also disposed within the housing 3. The water inlet and outlet assembly 43 is connected to the second end of the pump housing 41. The water inlet and outlet assembly 43 includes a pipe body disposed between a water inlet passage 431 and a water outlet passage 432. The connecting body 11 is tightly pressed between the pump housing 41 and the pipe body. The water inlet and outlet valve body is used to control the switching between two states: the pump chamber 45 communicates with the water inlet passage 431 within the water inlet and outlet assembly 43, or the pump chamber 45 communicates with the water outlet passage 432 within the water inlet and outlet assembly 43. The water inlet valve member 1 is disposed between the pump housing 41 and the water inlet and outlet assembly 43 for opening or blocking the water inlet passage 431. The water outlet valve member 2 is disposed within the water outlet passage 432 of the water inlet and outlet assembly 43 for opening or blocking the water outlet passage 432.

[0047] In this embodiment, the drive assembly 5 drives the pump diaphragm 44 to move in a direction approaching or departing from the pump chamber 45, thereby changing the pressure within the pump chamber 45, and further causing the water inlet and outlet valve body to open the water outlet passage 432 or open the water inlet passage 431, thereby realizing the water pumping or water drawing function of the water pump. Moreover, the water outlet valve member 2 can be opened or closed through the opening or closing of the tensioning portion 21. Thus, in the water pumping state, the water outlet valve member 2 is opened, while in the water inlet state, the water outlet valve member 2 blocks the water outlet passage 432. Specifically, when in the water drawing state, the drive assembly 5 drives the pump diaphragm 44 to move in a direction departing from the pump chamber 45. At this time, the volume of the pump chamber 45 increases, causing the pressure within the pump chamber 45 to decrease. As a result, the tensioning portion 21 closes and the water outlet valve member 2 blocks the water outlet, thereby blocking the water outlet through which the pump chamber 45 communicates with the water outlet passage 432. Moreover, the water inlet valve member 1 moves away from the water inlet through which the pump chamber 45 communicates with the water inlet passage 431, so that external water can flow into the pump chamber 45 from the water inlet through the water inlet passage 431. When in the water pumping state, the drive assembly 5 drives the pump diaphragm 44 to move in a direction approaching the pump chamber 45. At this time, the volume of the pump chamber 45 decreases, causing the pressure within the pump chamber 45 to increase. As a result, the tensioning portion 21 opens and the water outlet valve member 2 opens, thereby opening the water outlet through which the pump chamber 45 communicates with the water outlet passage 432. Moreover, the water inlet valve member 1 returns to the position of the water inlet through which the pump chamber 45 communicates with the water inlet passage 431, realizing the blocking of the water inlet and achieving the water pumping function.

[0048] In this embodiment, the pump housing 41 and the pump diaphragm end cover 42 can be connected together by means such as bolts, welding, clamping, or gluing. The pump housing 41 and the water inlet and outlet assembly 43 can be connected together by means such as bolts, welding, clamping, or gluing.

[0049] The water pump assembly of this embodiment can be applied to devices such as water flossers, floor washers, dishwashers, children's toys, food and beverage appliances, medical devices, inflatable pumps, landscape fountains, glass cleaners, processing machine tools, cooling and temperature reduction equipment, etc.

[0050] Embodiment Five:

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

[0052] Embodiment Six:

[0053] Based on Embodiments One to Five, the pump diaphragm 44 is provided with a skirt 441. One end of the pump housing 41 connected to the pump diaphragm end cover 42 is provided with a skirt groove 411, and the pump diaphragm end cover 42 presses and fixes the skirt 441 in the skirt groove 411. In this embodiment, by pressing and fixing the skirt 441 in the skirt groove 411 by the pump diaphragm end cover 42, when the driving assembly 5 drives the pump diaphragm 44 to move and change the volume of the pump chamber 45, the skirt 441 can remain stationary, and the pump diaphragm 44 can be set not to rub against the inner side wall of the pump housing 41, overcoming the situation where the traditional pump diaphragm 44 needs to rub against the inner side wall of the pump housing 41 and causing damage and water leakage of the pump diaphragm 44, further improving the sealing performance.

[0054] Furthermore, the pump diaphragm 44 and the skirt 441 are connected by a connecting arm 442. The connecting arm 442 includes a connecting portion 4421 connected to the skirt 441 and a bent portion 4422 connected to the pump diaphragm 44. There is a gap between the pump diaphragm 44 and the inner side wall of the pump housing 41. Through this setting, the pump diaphragm 44 can be movably connected to the inner side wall of the pump chamber 45 without friction, improving the service life of the pump diaphragm 44.

[0055] Furthermore, the pump diaphragm end cover 42 has an annular protrusion 421 facing the skirt groove 411. A connecting platform 443 is provided at the connection between the skirt 441 and the connecting arm 442. The annular protrusion 421 can contact the connecting step 443 and press tightly in the skirt groove 411.

[0056] Embodiment Seven:

[0057] The water pump assembly of this embodiment further includes a first seal 46 disposed between the pump housing 41 and the water inlet and outlet assembly 43, thereby improving the sealing between the pump housing 41 and the water inlet and outlet assembly 43.

[0058] Further, a first sealing groove 433 is provided between the water inlet and outlet assembly 43 and the pump housing 41, and the first seal 46 is press-fitted into the first sealing groove 433, thereby improving the sealing performance between the pump housing 41 and the water inlet and outlet assembly 43.

[0059] Embodiment VIII

[0060] The water pump assembly of the present application further includes a water inlet pipe 47 communicating with the water inlet passage 431 in the water inlet and outlet assembly 43. A second seal 48 is provided between the water inlet pipe 47 and the water inlet and outlet assembly 43, thereby improving the sealing performance between the water inlet pipe 47 and the water inlet and outlet assembly 43.

[0061] Further, a second sealing groove 471 is provided between the water inlet pipe 47 and the water inlet passage 431, and the second seal 48 is press-fitted into the second sealing groove 471, thereby improving the sealing performance between the two.

[0062] Embodiment IX

[0063] The drive assembly 5 of the present application includes a drive motor 51 disposed in the housing 3 and a plunger 52 having one end connected to the output end of the drive motor 51 and the other end connected to the pump diaphragm 44, for driving the pump diaphragm 44 to move towards or away from the pump housing 41. Specifically, by driving the drive motor 51 to drive the plunger 52 to move towards or away from the pump housing 41, the pump diaphragm 44 can move towards or away from the pump housing 41, thereby changing the volume of the pump chamber 45, causing the pressure in the pump chamber 45 to change, and realizing the state change of pumping or drawing water.

[0064] Further, the drive assembly 5 further includes a connecting gear 53 connected to the output end of the drive motor 51, a flat gear 54 pivotally connected in the housing 3 and meshing with the connecting gear 53, an eccentric boss 55 provided on the flat gear 54, and a connecting rod 56 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 rotation of the connecting gear 53 can be realized by driving the drive motor 51 to rotate, and then the eccentric boss 55 on the flat gear 54 rotates, realizing the movement of the plunger 52 towards or away from the pump chamber 45.

[0065] In other embodiments, the drive motor 51 can also be set as a linear motor, and the forward or backward movement of the pump diaphragm 44 can be realized through the linear movement of the drive motor 51. The hole where the connecting rod 56 cooperates with the flat gear 54 can also be changed to a runway shape. 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 movement to push the pump diaphragm 44.

[0066] Embodiment X:

[0067] The pump diaphragm 44 provided in this embodiment is provided with a water pushing groove 444 on the end face facing the pump chamber 45. Compared with the way that the end face of the pump diaphragm 44 facing the pump chamber 45 is set as a plane, the setting of the water pushing groove 444 can reduce the resistance of water, thereby reducing the energy consumption of the driving motor 51.

[0068] Embodiment XI

[0069] This application also provides a dental irrigator, including the water pump assembly in the above solution. Through the above water pump assembly, it is possible to improve the water leakage prevention and sealing performance of the dental irrigator. At the same time, the service lives of the water inlet and outlet valve body and the pump diaphragm 44 are also longer, thereby extending the service life of the dental irrigator. Moreover, the water inlet channel 431 and the water outlet channel 432 are integrated into the water inlet and outlet assembly 43, thereby reducing the volume of the water pump assembly and reducing the occupation of space in the dental irrigator.

[0070] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "one example", "some examples", "example", "specific example", or "some examples" etc. 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0071] And the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0072] The above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or replacements can still be made.

Claims

1. A water pump assembly, characterized in that: The pump comprises a pump body, an inlet and outlet water assembly arranged at an opening of the second end of the pump body, and a driving assembly for driving the pump body to draw or pump water; an inlet and outlet water valve body is arranged in the inlet and outlet water assembly, and the inlet and outlet water valve body comprises an inlet valve member and an outlet water valve member that are integrally formed and coaxially arranged, a pump cavity is arranged in the pump body, and a coaxially arranged inlet channel and outlet water channel are arranged in the inlet and outlet water assembly; During the pumping process, the water inlet valve component is used to connect the pump chamber with the water inlet channel, and the water outlet valve component is used to block the pump chamber and the water outlet channel. During the pumping process, the water outlet valve component is used to connect the pump chamber with the water outlet channel, and the water inlet valve component is used to block the pump chamber and the water inlet channel.

2. The water pump assembly according to claim 1, characterized in that: The water inlet valve member surrounds the water outlet valve member, and the water inlet channel surrounds the water outlet channel; or, The water outlet valve member surrounds the water inlet valve member, and the water outlet channel surrounds the water inlet channel.

3. The water pump assembly according to claim 1, characterized in that: The water outlet valve member includes at least two tensioning parts connected to the water inlet valve member, the water inlet valve member surrounds the water outlet valve member and is elastic; the two side edges of the tensioning part are respectively connected to the side edges of adjacent tensioning parts, the tensioning part can be opened or closed, and the water outlet channel surrounds the water inlet channel.

4. The water pump assembly according to claim 3, characterized in that: One end of the tensioning part is connected to the water inlet valve member, the end of the tensioning part is arc-shaped, and the ends of all the tensioning parts are connected to form a circle; the other end of the tensioning part is folded in the axial direction of the circle.

5. The water pump assembly according to claim 3, characterized in that: The number of the tensioning parts is greater than or equal to two.

6. The water pump assembly according to claim 3, characterized in that: The water inlet valve member includes a connector connected to the tensioning portion and an elastic retaining edge connected to the connector. The water inlet and outlet assembly includes a tube body arranged between the water inlet channel and the water outlet channel. The connector is tightly pressed between the pump body and the tube body.

7. The water pump assembly according to claim 1, characterized in that: The pump body also includes a pump casing, a pump membrane end cover connected to a first end of the pump casing, and a pump membrane arranged between the pump membrane end cover and the pump casing, wherein the pump casing and the pump membrane define the pump chamber; the pump membrane is provided with a skirt, and a skirt groove is provided at one end of the pump casing connected to the pump membrane end cover, and the pump membrane end cover squeezes and fixes the skirt in the skirt groove.

8. The water pump assembly according to claim 7, characterized in that: The water pump assembly also includes a first seal arranged between the pump housing and the water inlet and outlet assembly; the water pump assembly also includes a water inlet pipe connected to the water inlet channel in the water inlet and outlet assembly, and a second seal is arranged between the water inlet pipe and the water inlet and outlet assembly.

9. The water pump assembly according to claim 7, characterized in that: It also includes a shell, and the pump body, water inlet and outlet components and drive component are all arranged in the shell. The drive component includes a drive motor arranged in the shell and a plunger connected to the output end of the drive motor at one end and the pump membrane at the other end and used to drive the pump membrane to move toward or away from the pump shell; the drive component also includes a connecting gear connected to the output end of the drive motor, a plane gear axially connected to the shell and meshing with the gear, an eccentric boss arranged on the plane gear and a connecting rod sleeved on the eccentric boss; the connecting rod is connected to the plunger at one end away from the eccentric boss.

10. An oral cleaning device, characterized in that: A water pump assembly comprising any one of claims 1 to 9.

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