Pump body, water pump and oral irrigator

Abstract

The utility model discloses a pump body, a water pump and an oral irrigator, the pump body is applied to the oral irrigator, the pump body is provided with a water pumping cavity, a water inlet and a water outlet, the water inlet and the water outlet are communicated with the water pumping cavity, and the water pumping cavity comprises a driving cavity, a communicating cavity and a water outlet cavity which are communicated in sequence. The circulation sectional area of the driving cavity is larger than the circulation sectional area of the communicating cavity, the circulation sectional area of the communicating cavity is larger than the circulation sectional area of the water outlet cavity, the water inlet is communicated with the communicating cavity, and the water outlet is communicated with the water outlet cavity. According to the technical scheme, the water outlet pressure of the water pump can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of pump bodies, in particular to a pump body, a water pump and a dental flosser. Background Art

[0002] A water flosser usually includes a water pump, a nozzle, a driving member and a water tank. The water pump is connected between the nozzle and the water tank. The driving member drives the water pump to pump the water in the water tank out of the nozzle to achieve flushing and cleaning of the teeth and the oral cavity. The water pump of the existing water flosser has an unreasonable pump body structure design, resulting in insufficient water outlet pressure of the water pump and affecting the flushing effect of the water flosser. Therefore, it is necessary to propose a new pump body structure to increase the water outlet pressure of the water pump. Utility Model Content

[0003] The main purpose of the utility model is to provide a pump body, aiming to increase the water outlet pressure of the water pump.

[0004] To achieve the above-mentioned purpose, the pump body proposed in the utility model is applied to a water flosser, and the pump body is provided with a water pump chamber, a water inlet and a water outlet connected to the water pump chamber, the water pump chamber comprises a driving chamber, a connecting chamber and a water outlet chamber connected in sequence, the flow cross-sectional area of ​​the driving chamber is larger than the flow cross-sectional area of ​​the connecting chamber, the flow cross-sectional area of ​​the connecting chamber is larger than the flow cross-sectional area of ​​the water outlet chamber, the water inlet is connected to the connecting chamber, and the water outlet is connected to the water outlet chamber.

[0005] Optionally, the axial dimension of the connecting cavity is greater than the axial dimension of the water outlet cavity.

[0006] Optionally, the ratio of the axial dimension of the connecting cavity to the axial dimension of the water outlet cavity ranges from 2 to 4.

[0007] Optionally, the axial dimension of the driving cavity is larger than the axial dimension of the water outlet cavity, and / or the axial dimension of the driving cavity is smaller than the axial dimension of the connecting cavity.

[0008] Optionally, the driving cavity, the connecting cavity and the water outlet cavity are coaxially arranged.

[0009] Optionally, a first conical hole is provided between the driving cavity and the connecting cavity, the small end of the first conical hole is connected to the connecting cavity, and the large end of the first conical hole is connected to the driving cavity.

[0010] Optionally, a second conical hole is provided between the water outlet cavity and the connecting cavity, the small end of the second conical hole is connected to the water outlet cavity, and the large end of the second conical hole is connected to the connecting cavity.

[0011] Optionally, the opening direction of the water inlet is arranged to intersect with the axial direction of the connecting cavity, and the water inlet is arranged in the middle of the connecting cavity.

[0012] The utility model also provides a water pump, comprising the above-mentioned pump body.

[0013] Optionally, the water pump further comprises a water inlet one-way valve, which is disposed at the water inlet and is used to limit water from flowing from the connecting cavity to the water inlet.

[0014] Optionally, the water inlet one-way valve includes a valve seat, a valve core and an elastic reset member, the valve seat having a first flow channel and a second flow channel that are connected to each other, the first port of the first flow channel being used to connect with an external water source, the second flow channel being connected between the second port of the first flow channel and the water inlet, the valve core being movably disposed in the second flow channel and being capable of blocking or opening the second port of the first flow channel, the elastic reset member being disposed on a side of the valve core away from the first flow channel, and the elastic deformation amount increases in the process of the valve core moving away from the first flow channel.

[0015] Optionally, at least two first protrusions are provided at intervals on the outer edge of the water inlet, and a first notch is formed between two adjacent first protrusions. When the second port of the first flow channel is opened, the valve core abuts against the end face of the first protrusion to allow water to flow from the second flow channel into the water inlet through the first notch.

[0016] Optionally, the valve core includes a core column and a plurality of limiting ribs connected to the outer periphery of the core column, the plurality of limiting ribs are spaced apart along the circumference of the core column, a second notch is formed between two adjacent limiting ribs, one end of the elastic reset member is inserted in the gap between the limiting rib and the core column, and the other end abuts against the outer edge of the water inlet.

[0017] Optionally, the water pump further includes a water outlet one-way valve, which is disposed at the water outlet and is used to limit water from flowing from the water outlet to the water outlet cavity.

[0018] Optionally, a second convex portion is provided on the outer edge of the water outlet, and the water outlet one-way valve is configured as a duckbill valve, and the water inlet end of the duckbill valve is sleeved on the outer peripheral surface of the second convex portion.

[0019] Optionally, the width of the slit of the duckbill valve is greater than the width of the water outlet cavity.

[0020] Optionally, the extension direction of the slit of the duckbill valve is arranged in parallel with the opening direction of the water inlet.

[0021] Optionally, the water pump further comprises an elastic diaphragm arranged in the driving cavity, a pumping space is formed between the inner wall surface of the elastic diaphragm and the cavity wall surface of the driving cavity, and the elastic diaphragm can be elastically deformed relative to the pump body to change the size of the pumping space.

[0022] Optionally, the elastic diaphragm includes a mounting portion, a plug body portion, and a deformation portion connecting the mounting portion and the plug body portion, the mounting portion is connected to the pump body, the deformation portion can be elastically deformed and cause the plug body portion to expand and contract relative to the driving cavity, the peripheral surface of the plug body portion is arranged in accordance with the driving cavity, and can be at least partially adapted to be embedded in the driving cavity.

[0023] The utility model also provides a water flosser, comprising the aforementioned water pump.

[0024] In the technical solution of the utility model, by setting the flow cross-sectional area of ​​the driving cavity, the flow cross-sectional area of ​​the connecting cavity, and the flow cross-sectional area of ​​the connecting cavity to be successively smaller, water can flow from the water inlet into the connecting cavity more smoothly, and the water outlet pressure when the water is pumped out from the water outlet can be made stronger, thereby improving the flushing effect of the water flosser. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 This is a schematic structural diagram of an embodiment of a pump body of the utility model;

[0027] Figure 2 for Figure 1 a top view of the structure shown;

[0028] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0029] Figure 4 A cross-sectional view of an embodiment of a water pump of the utility model;

[0030] Figure 5 for Figure 4 An exploded view of the structure shown;

[0031] Figure 6 for Figure 4 Another exploded view of the structure shown;

[0032] Figure 7This is a structural schematic diagram of an embodiment of the tooth flosser of the utility model;

[0033] Figure 8 for Figure 7 The internal structure diagram of the water flosser is shown after part of the installation shell structure is removed.

[0034] Description of Figure Numbers:

[0035]

[0036]

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0042] The utility model provides a pump body which is applied to a water flosser.

[0043] Please refer to Figures 1 to 3 In one embodiment of the utility model, the pump body 31 is provided with a water pumping chamber 31a, a water inlet 31b and a water outlet 31c connected to the water pumping chamber 31a, the water pumping chamber 31a includes a driving chamber 31d, a connecting chamber 31e and a water outlet chamber 31f connected in sequence, the flow cross-sectional area of ​​the driving chamber 31d is larger than the flow cross-sectional area of ​​the connecting chamber 31e, the flow cross-sectional area of ​​the connecting chamber 31e is larger than the flow cross-sectional area of ​​the water outlet chamber 31f, the water inlet 31b is connected to the connecting chamber 31e, and the water outlet 31c is connected to the water outlet chamber 31f.

[0044] For details, please refer to Figures 4 to 8 In the embodiment of the utility model, the water flosser includes a water pump 30 and a driving member 40. The water pump 30 includes a pump body 31 and an elastic diaphragm 32. The elastic diaphragm 32 is arranged in the driving cavity 31d. A pumping space is formed between the inner wall surface of the elastic diaphragm 32 and the cavity wall surface of the driving cavity 31d. The elastic diaphragm 32 is driven and connected to the driving member 40 so that it can be elastically deformed relative to the driving cavity 31d to periodically change the size of the pumping space, thereby prompting water to flow from the water inlet 31b into the pumping cavity 31a, and then flow out of the pumping cavity 31a from the water outlet 31c, and complete the function of pumping water. Of course, the pump body 31 of the utility model can also be applied to other forms of water pumps 30 and water flossers, not limited to the above-mentioned structural forms.

[0045] It can be understood that under the condition that the axial dimensions of the driving cavity 31d are the same, since the flow cross-sectional area of ​​the driving cavity 31d is larger, the pumping space has a larger volume, which is conducive to increasing the pumping pressure formed by the volume change of the pumping space, and then increasing the water outlet pressure of the water pump 30 at the water outlet 31c. Secondly, the flow cross-sectional area from the connecting cavity 31e to the water outlet cavity 31f becomes smaller, which can make the water have a greater water pressure after flowing from the connecting cavity 31e to the water outlet cavity 31f, which is conducive to increasing the water outlet pressure of the water pump 30 at the water outlet 31c. Furthermore, under the condition that the axial dimensions of the connecting cavity 31e are the same, since the flow cross-sectional area of ​​the connecting cavity 31e is larger, the connecting cavity 31e has a larger volume, which can reduce the resistance and impact loss when water flows from the water inlet 31b into the connecting cavity 31e, which is conducive to the smoothness of water flowing into the pump water cavity 31a.

[0046] In the technical solution of the utility model, by setting the flow cross-sectional area of ​​the driving cavity 31d, the flow cross-sectional area of ​​the connecting cavity 31e, and the flow cross-sectional area of ​​the connecting cavity 31e to be successively smaller, water can flow from the water inlet 31b into the connecting cavity 31e more smoothly, and the water pressure when the water is pumped out from the water outlet 31c can be made stronger, thereby improving the flushing effect of the water flosser.

[0047] Please refer to Figure 3 In one embodiment, the axial dimension of the connecting cavity 31e is optionally greater than the axial dimension of the water outlet cavity 31f. In this way, under the condition that the axial dimension of the pump water cavity 31a is the same, the axial dimension of the connecting cavity 31e is set larger, which can make the connecting cavity 31e have a larger volume, which is more conducive to improving the smoothness of water flowing in from the water inlet 31b and reducing the impact loss of water energy, thereby facilitating the improvement of the water outlet pressure of the pump body 31. Of course, in other embodiments, the axial dimension of the connecting cavity 31e can also be less than or equal to the axial dimension of the water outlet cavity 31f.

[0048] In one embodiment, the ratio of the axial dimension of the connecting cavity 31e to the axial dimension of the water outlet cavity 31f is optionally in the range of 2 to 4, for example, 2.5, 3 or 3.5. It can be understood that under the condition that the axial dimension of the pump water cavity 31a is the same, if the value of the above ratio is too small, that is, the axial dimension of the connecting cavity 31e and the axial dimension of the water outlet cavity 31f are relatively close, the volume of the connecting cavity 31e is not large enough, which is not conducive to the smoothness of water flowing from the water inlet 31b into the connecting cavity 31e. If the value of the above ratio is too large, the axial dimension of the water outlet cavity 31f is not large enough, which is not conducive to the water outlet pressure when the water flows out from the water outlet 31c.

[0049] Please refer to Figure 3In one embodiment, the axial dimension of the driving cavity 31d is optionally greater than the axial dimension of the water outlet cavity 31f. In this way, the volume of the driving cavity 31d can be increased, thereby further improving the pumping pressure of the water pump 30. Of course, in other embodiments, the axial dimension of the driving cavity 31d can also be less than or equal to the axial dimension of the connecting cavity 31e.

[0050] Further optionally, the axial dimension of the driving cavity 31d is smaller than the axial dimension of the connecting cavity 31e. In this way, under the premise of ensuring that the water pump 30 has a certain pumping pressure, it is beneficial to reduce the axial dimension of the pump body 31 and facilitate the miniaturization design of the water pump 30. Of course, in other embodiments, the axial dimension of the driving cavity 31d may be greater than or equal to the axial dimension of the connecting cavity 31e.

[0051] Please refer to Figure 3 In order to facilitate the processing and forming of the pump body 31, in one embodiment, the driving cavity 31d, the connecting cavity 31e and the water outlet cavity 31f are optionally arranged coaxially. Of course, in other embodiments, at least two of the driving cavity 31d, the connecting cavity 31e and the water outlet cavity 31f may be arranged non-coaxially.

[0052] Please refer to Figure 3 In one embodiment, optionally, a first conical hole 31h is provided between the driving cavity 31d and the connecting cavity 31e, the small end of the first conical hole 31h is connected to the connecting cavity 31e, and the large end of the first conical hole 31h is connected to the driving cavity 31d. Further optionally, a second conical hole 31k is provided between the water outlet cavity 31f and the connecting cavity 31e, the small end of the second conical hole 31k is connected to the water outlet cavity 31f, and the large end of the second conical hole 31k is connected to the connecting cavity 31e. In this way, the flow of water in the pump water cavity 31a can be smoother, and the probability and degree of dead zones and vortices formed in the pump water cavity 31a can be reduced. Of course, in other embodiments, the first conical hole 31h and the second conical hole 31k may not be provided, or only one of them may be provided.

[0053] Please refer to Figure 3In one embodiment, the opening direction of the water inlet 31b is optionally arranged to intersect with the axial direction of the connecting cavity 31e, and the water inlet 31b is arranged in the middle of the connecting cavity 31e. Specifically, when the elastic diaphragm 32 on the driving cavity 31d is deformed and displaced to push the water in the pump water cavity 31a to flow out of the water outlet 31c, a negative pressure area will be generated at the water inlet 31b of the connecting cavity 31e, and the water of the external water source (such as the water tank of the water flosser) connected to the water inlet 31b will flow into the pump water cavity 31a, thereby realizing the continuous pumping action of the water pump 30. In this way, the structure of the pump body 31 in the width direction can be made more compact, which is conducive to the miniaturization design of the water pump 30. Of course, in other embodiments, the water inlet 31b can also be arranged at the end of the connecting cavity 31e, or the opening direction of the water inlet 31b can be arranged parallel to the axial direction of the connecting cavity 31e.

[0054] Please refer to Figures 4 to 6 The utility model also proposes a water pump 30, which includes the aforementioned pump body 31. The specific structure of the pump body 31 refers to the above-mentioned embodiment. Since the water pump 30 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0055] Please refer to Figures 4 to 6 In one embodiment, the water pump 30 may further include a water inlet check valve 34, which is disposed at the water inlet 31b and is used to limit the flow of water from the connecting cavity 31e to the water inlet 31b. In this way, the pumping pressure generated by the elastic diaphragm 32 can be basically converted into the water outlet pressure and the water outlet pressure can be increased, and the problem of water that has flowed into the pump water cavity 31a flowing back into the water tank and contaminating the water tank can be avoided. Of course, in other embodiments, the water inlet check valve 34 may not be disposed on the water pump 30, but may be disposed on the water outlet 31c of the water tank.

[0056] Please refer to Figures 4 to 6 In one embodiment, the water inlet check valve 34 optionally includes a valve seat 341, a valve core 342 and an elastic reset member 343. The valve seat 341 has a first flow channel 34a and a second flow channel 34b that are connected. The first port of the first flow channel 34a is used to communicate with an external water source. The second flow channel 34b is connected between the second port of the first flow channel 34a and the water inlet 31b. The valve core 342 is movably arranged in the second flow channel 34b and can block or open the second port of the first flow channel 34a. The elastic reset member 343 is arranged on the side of the valve core 342 away from the first flow channel 34a, and the elastic deformation amount increases in the process of the valve core 342 moving away from the first flow channel 34a. In this way, the structure is simple and easy to implement. Of course, the water inlet check valve 34 can also adopt other structural forms, such as a duckbill valve, which is not specifically limited in this application.

[0057] Please refer to Figure 2 and Figure 4 In one embodiment, optionally, at least two first protrusions 311 are provided at intervals on the outer edge of the water inlet 31b, and a first notch 31q is formed between two adjacent first protrusions 311. When the second port of the first flow channel 34a is opened, the valve core 342 abuts against the end surface of the first protrusion 311, so that water flows from the second flow channel 34b through the first notch 31q into the water inlet 31b. In this way, the structure is simple and easy to implement. Of course, in other embodiments, other structural forms can also be adopted, for example, the first protrusion 311 is provided on the side edge of the end surface of the valve core 342 facing the water inlet 31b.

[0058] Please refer to Figures 4 to 6 In one embodiment, the valve core 342 includes a core column 344 and a plurality of limiting ribs 345 connected to the outer periphery of the core column 344. The plurality of limiting ribs 345 are spaced along the circumference of the core column 344, and a second notch 34c is formed between two adjacent limiting ribs 345. One end of the elastic reset member 343 is inserted in the interval between the limiting rib 345 and the core column 344, and the other end abuts against the outer edge of the water inlet 31b. Specifically, the other end of the elastic reset member 343 is sleeved on the outer periphery of the two first protrusions 311. In this way, by adding the second notch 34c, the flow cross-sectional area inside the valve seat 341 can be increased, which is conducive to improving the smoothness of water flowing in the valve seat 341 and reducing the impact loss of water pressure. Secondly, one end of the elastic reset member 343 is inserted into the gap between the limiting rib 345 and the core column 344, and the other end of the elastic reset member 343 is sleeved on the outer periphery of the two first protrusions 311, so that the connection of the elastic reset member 343 is reliable and the operation is stable. Of course, in other embodiments, the second notch 34c may not be provided.

[0059] Please refer to Figure 3 and Figure 4 In one embodiment, optionally, the pump body 31 is provided with a first countersunk hole 31j corresponding to the valve seat 341, the water inlet 31b is provided on the bottom surface of the first countersunk hole 31j, and is communicated with the first countersunk hole 31j, and the valve seat 341 is adapted to be embedded in the first countersunk hole 31j. In this way, the structure is simple and easy to implement. Further optionally, the outer peripheral surface of the valve seat 341 is sleeved with a first sealing ring 346, and the first sealing ring 346 is sandwiched between the hole wall surface of the first countersunk hole 31j and the outer peripheral surface of the valve seat 341 to seal the water pump 30 on the water inlet side. Of course, in other embodiments, the first countersunk hole 31j may not be provided, for example, the end face of the valve seat 341 is fixed to the outer side surface of the pump body 31 by welding or bonding.

[0060] Please refer to Figures 4 to 6In one embodiment, the water pump 30 may also include a water outlet check valve 35, which is disposed at the water outlet 31c and is used to limit the flow of water from the water outlet 31c to the water outlet cavity 31f. In this way, the pumping pressure generated by the elastic diaphragm 32 can be basically converted into the water outlet pressure and the water outlet pressure can be increased, and the problem of water that has flowed into the pump water cavity 31a flowing back into the water tank and contaminating the water tank can be avoided. Of course, in other embodiments, the water inlet check valve 34 may not be disposed on the water pump 30, but the water inlet check valve 34 may be disposed on the water outlet 31c of the water tank.

[0061] Please refer to Figure 3 and Figure 4 In one embodiment, optionally, the outer edge of the water outlet 31c is provided with a second protrusion 312, and the water outlet check valve 35 is configured as a duckbill valve, and the water inlet end of the duckbill valve is sleeved on the outer peripheral surface of the second protrusion 312. In this way, the structure is simple and easy to implement. Of course, in other embodiments, the water outlet check valve 35 can also adopt other structural forms, such as adopting a structural solution similar to the water inlet check valve 34 mentioned above, and this application does not make specific limitations on this.

[0062] Please refer to Figures 3 to 6 , further optionally, the water pump 30 also includes a water outlet 36 for the nozzle to be plugged in, the duckbill valve part extends into the water outlet 36, and is connected to the nozzle through the inner cavity of the water outlet 36; the pump body 31 is provided with a second countersunk hole 31n corresponding to the water outlet 36, the water outlet 31c is provided on the bottom surface of the second countersunk hole 31n, the water outlet 36 is adapted to be embedded in the second countersunk hole 31n, and the duckbill valve is pressed on the outer edge of the water outlet 31c. In this way, the structure is simple and easy to implement. Further optionally, the outer peripheral surface of the water outlet 36 is sleeved with a second sealing ring 361, and the second sealing ring 361 is sandwiched between the hole wall surface of the second countersunk hole 31n and the outer peripheral surface of the water outlet 36 to seal the water pump 30 on the water outlet side. Of course, in other embodiments, the second countersunk hole 31n may not be provided, for example, the end face of the water outlet 36 is fixed to the outer side of the pump body 31 by welding or bonding.

[0063] Please refer to Figure 4 In one embodiment, the width of the slit of the duckbill valve is optionally greater than the width of the water outlet cavity 31f. In this way, it is possible to ensure that the flow rate flowing out of the slit of the duckbill valve is sufficient, thereby avoiding the problem of insufficient water flow rate. Of course, in other embodiments, the width of the slit of the duckbill valve may be less than or equal to the width of the water outlet cavity 31f.

[0064] In one embodiment, optionally, the extension direction of the slit of the duckbill valve is arranged in parallel with the opening direction of the water inlet 31b. It should be noted that parallel means parallel or nearly parallel. In this way, it is beneficial to the smooth flow of water from the water inlet 31b to the water outlet 31c and reduce impact losses. Of course, in other embodiments, the extension direction of the slit of the duckbill valve may also be arranged to intersect with the opening direction of the water inlet 31b, for example, the angle between the two is 90°.

[0065] Please refer to Figures 4 to 6 In one embodiment, the water pump 30 may further include an elastic diaphragm 32 disposed in the driving cavity 31d, and a pumping space is formed between the inner wall surface of the elastic diaphragm 32 and the cavity wall surface of the driving cavity 31d. The elastic diaphragm 32 can be elastically deformed relative to the pump body 31 to change the size of the pumping space. Specifically, the driving cavity 31d penetrates the end surface of the pump body 31 and forms a telescopic cavity opening 31g, and the plug body 322 performs telescopic displacement at the telescopic cavity opening 31g. In this way, the structure is simple and easy to implement and assemble.

[0066] Please refer to Figure 4 , further optionally, the elastic diaphragm 32 includes a mounting portion 321, a plug portion 322, and a deformation portion 323 connecting the mounting portion 321 and the plug portion 322, the mounting portion 321 is connected to the pump body 31, the deformation portion 323 can be elastically deformed and cause the plug portion 322 to expand and contract relative to the drive cavity 31d, the peripheral side surface of the plug portion 322 is arranged in accordance with the drive cavity 31d, and can at least partially fit and embed into the drive cavity 31d. For example, when the peripheral side surface of the drive cavity 31d is a cylindrical surface, the peripheral side surface of the plug portion 322 is also arranged in a cylindrical surface, specifically optionally, the diameter of the plug portion 322 ranges from 6mm to 15mm, preferably 8mm; the diameter of the drive cavity 31d can be slightly larger than the plug portion 322, for example, the diameter of the drive cavity 31d is larger than the diameter of the plug portion 322 by 0.2mm, that is, the diameter of the drive cavity 31d ranges from 6.2mm to 15.2mm.

[0067] It can be understood that because the reciprocating motion trajectory of the plug body 322 is usually not a straight line, but is closer to an ellipse or a shape similar to a sine curve, if the diameter of the drive cavity 31d and the diameter of the plug body 322 are too small, it is easy to cause unnecessary friction between the plug body 322 and the drive cavity 31d during the deformation and displacement of the elastic diaphragm 32, thereby affecting the service life of the elastic diaphragm 32 and the liquid pump. If the diameter of the drive cavity 31d and the diameter of the plug body 322 are too different, the dead zone and the retention volume in the pumping space are too large, which is not conducive to the pumping efficiency of the water pump 30.

[0068] Specifically, when the plug body 322 periodically expands and contracts in the driving cavity 31d, it can cause the volume of the pumping space to change periodically, thereby producing a pumping effect on the water in the pumping cavity 31a. Since the peripheral side surface of the plug body 322 follows the driving cavity 31d, when the plug body 322 retracts into the driving cavity 31d, the probability and degree of dead zone generation in the driving cavity 31d can be reduced, thereby improving the water pumping effect of the elastic diaphragm 32, and improving the water pumping pressure and water pumping efficiency of the water pump 30. Of course, in other embodiments, the peripheral side surface of the plug body 322 may not follow the driving cavity 31d, or the size of the plug body 322 may be significantly smaller than the size of the driving cavity 31d.

[0069] Please refer to Figure 7 and Figure 8 The utility model also proposes a water flosser, which includes a water pump 30, and the water pump 30 includes the aforementioned pump body 31. The specific structure of the pump body 31 refers to the above-mentioned embodiment. Since the water flosser adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0070] Please refer to Figure 7 and Figure 8 In one embodiment, the water flosser further comprises a mounting shell 10, and a driving member 40 and a transmission assembly 20 disposed on the mounting shell 10. The transmission assembly 20 comprises a driving wheel 21, a driven wheel 22 and a crank 23. The driving wheel 21 is disposed on the rotating shaft of the driving member 40. The driven wheel 22 is drivingly connected to the driving wheel 21. The crank 23 has an input end and an output end relative to each other. The output end is connected to the elastic diaphragm 32 of the water pump 30. The input end is eccentrically connected to the driven wheel 22 to realize the function of the output end driving the elastic diaphragm 32 to perform reciprocating motion. Specifically, the driving wheel 21 is a bevel gear, and the driven wheel 22 is a face gear. The bevel gear and the face gear are meshed and connected. The crank 23 is disposed on the side of the face gear having a tooth surface.

[0071] Please refer to Figure 3 and Figure 4 In one embodiment, optionally, the end surface of the pump body 31 is provided with a first annular groove 31p corresponding to the mounting portion 321, and the mounting portion 321 is embedded in the first annular groove 31p. The water pump 30 also includes a pressure ring 33, which is provided on the inner wall surface of the mounting shell 10 and clamps the mounting portion 321 together with the groove bottom surface of the first annular groove 31p. That is, the pressure ring 33 presses the mounting portion 321 against the groove bottom surface of the first annular groove 31p, thereby improving the installation reliability of the elastic diaphragm 32 and avoiding the problem that the elastic diaphragm 32 accidentally separates from the pump body 31 during the deformation and displacement process. Of course, in other embodiments, the pressure ring 33 may not be provided, and the mounting portion 321 may be fixed to the pump body 31 by bonding, riveting or screwing.

[0072] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pump body, used in a water flosser, characterized in that: The pump body is provided with a water pumping chamber, a water inlet and a water outlet connected to the water pumping chamber, the water pumping chamber includes a driving chamber, a connecting chamber and a water outlet chamber connected in sequence, the flow cross-sectional area of ​​the driving chamber is larger than the flow cross-sectional area of ​​the connecting chamber, the flow cross-sectional area of ​​the connecting chamber is larger than the flow cross-sectional area of ​​the water outlet chamber, the water inlet is connected to the connecting chamber, and the water outlet is connected to the water outlet chamber.

2. The pump body according to claim 1, characterized in that: The axial dimension of the communication cavity is greater than the axial dimension of the water outlet cavity.

3. The pump body according to claim 2, characterized in that: The ratio of the axial dimension of the communicating cavity to the axial dimension of the water outlet cavity ranges from 2 to 4.

4. The pump body according to claim 1, characterized in that: The axial dimension of the driving cavity is larger than the axial dimension of the water outlet cavity, and / or the axial dimension of the driving cavity is smaller than the axial dimension of the connecting cavity.

5. The pump body according to claim 1, characterized in that: The driving cavity, the communicating cavity and the water outlet cavity are coaxially arranged.

6. The pump body according to claim 5, characterized in that: A first conical hole is provided between the driving cavity and the communicating cavity, the small end of the first conical hole is connected to the communicating cavity, and the large end of the first conical hole is connected to the driving cavity.

7. The pump body according to claim 5, characterized in that: A second conical hole is provided between the water outlet cavity and the connecting cavity, the small end of the second conical hole is connected to the water outlet cavity, and the large end of the second conical hole is connected to the connecting cavity.

8. The pump body according to claim 5, characterized in that: The opening direction of the water inlet is arranged to intersect with the axial direction of the communication cavity, and the water inlet is arranged in the middle of the communication cavity.

9. A water pump, characterized in that: Comprising a pump body as described in any one of claims 1-8.

10. The water pump according to claim 9, characterized in that The water pump further comprises a water inlet one-way valve, which is arranged at the water inlet and is used to limit water from flowing from the communicating cavity to the water inlet.

11. The water pump according to claim 10, characterized in that The water inlet one-way valve includes a valve seat, a valve core and an elastic reset member, the valve seat has a first flow channel and a second flow channel that are connected to each other, the first port of the first flow channel is used to communicate with an external water source, the second flow channel is connected between the second port of the first flow channel and the water inlet, the valve core is movably arranged in the second flow channel, and can block or open the second port of the first flow channel, the elastic reset member is arranged on a side of the valve core away from the first flow channel, and the elastic deformation amount increases in the process of the valve core moving away from the first flow channel.

12. The water pump according to claim 11, characterized in that At least two first protrusions are arranged at intervals on the outer edge of the water inlet, and a first notch is formed between two adjacent first protrusions. When the second port of the first flow channel is opened, the valve core abuts against the end face of the first protrusion to allow water to flow from the second flow channel through the first notch into the water inlet.

13. The water pump according to claim 12, characterized in that The valve core includes a core column and a plurality of limiting ribs connected to the outer periphery of the core column, the plurality of limiting ribs are spaced apart along the circumference of the core column, a second notch is formed between two adjacent limiting ribs, one end of the elastic reset member is inserted in the gap between the limiting rib and the core column, and the other end abuts against the outer edge of the water inlet.

14. The water pump according to claim 9, characterized in that The water pump further comprises a water outlet one-way valve, which is arranged at the water outlet and is used to limit water from flowing from the water outlet to the water outlet cavity.

15. The water pump according to claim 14, characterized in that A second convex portion is disposed on the outer edge of the water outlet, and the water outlet one-way valve is configured as a duckbill valve, and the water inlet end of the duckbill valve is sleeved on the outer peripheral surface of the second convex portion.

16. The water pump according to claim 15, characterized in that The width of the slit of the duckbill valve is greater than the width of the water outlet cavity.

17. The water pump according to claim 15, characterized in that The extending direction of the slit of the duckbill valve is arranged in parallel with the opening direction of the water inlet.

18. The water pump according to claim 9, characterized in that The water pump also includes an elastic diaphragm arranged in the driving cavity, a pumping space is formed between the inner wall surface of the elastic diaphragm and the cavity wall surface of the driving cavity, and the elastic diaphragm can be elastically deformed relative to the pump body to change the size of the pumping space.

19. The water pump according to claim 18, characterized in that The elastic diaphragm includes a mounting portion, a plug body portion, and a deformation portion connecting the mounting portion and the plug body portion, wherein the mounting portion is connected to the pump body, the deformation portion can be elastically deformed and cause the plug body portion to expand and contract relative to the driving cavity, and the peripheral surface of the plug body portion is arranged in accordance with the driving cavity and can be at least partially adapted to be embedded in the driving cavity.

20. A water flosser, characterized in that: Comprising a water pump as described in any one of claims 9-19.

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