Water pump and oral irrigator

Abstract

The water pump comprises a shell, a pump body, an elastic diaphragm and a pressing ring, and the shell is provided with a mounting cavity; the pump body is arranged in the mounting cavity and is provided with a water pumping cavity, and a water inlet and a water outlet which are communicated with the water pumping cavity; the elastic diaphragm is arranged in the water pumping cavity, a pumping space is formed between the inner wall face of the elastic diaphragm and the cavity wall face of the water pumping cavity, the elastic diaphragm comprises a mounting part, a plug body part and a deformation part connected with the mounting part and the plug body part, and the deformation part can deform and displace in the first direction and promote the plug body part to stretch out and draw back relative to the water pumping cavity so as to change the size of the pumping space; the pressing ring is arranged in the mounting cavity and can clamp the mounting part together with the pump body. According to the technical scheme, the installation reliability of the elastic diaphragm can be improved, and the risk of functional abnormality of the water pump is reduced.

Description

Technical Field

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

[0002] A water flosser usually includes a nozzle, a water tank, a water pump and a driving component. The water pump is connected between the nozzle and the water tank. The water pump usually includes a pump body and an elastic diaphragm. The elastic diaphragm is driven and connected to the driving component so as to be able to undergo periodic elastic deformation relative to the driving cavity, thereby causing the water in the water tank to flow from the water tank into the pump body and then flow out of the nozzle from the pump body to complete the function of pumping water.

[0003] Among them, the elastic diaphragm is usually directly bonded to the pump body with adhesive. The elastic deformation of the elastic diaphragm will have a negative impact on the bonding surface. Therefore, the elastic diaphragm is prone to adhesion, loosening or even failure after long-term use, resulting in malfunction of the water pump. Utility Model Content

[0004] The main purpose of the utility model is to provide a water pump, aiming to improve the installation reliability of the elastic diaphragm and reduce the risk of malfunction of the water pump.

[0005] In order to achieve the above-mentioned purpose, the water pump proposed in the utility model is applied to a water flosser, and the water pump comprises:

[0006] A housing having a mounting cavity;

[0007] A pump body, arranged in the installation cavity, and comprising a water pump cavity, a water inlet and a water outlet communicated with the water pump cavity;

[0008] An elastic diaphragm is arranged in the water pumping cavity, a pumping space is formed between the inner wall surface of the elastic diaphragm and the cavity wall surface of the water pumping cavity, 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 deformation portion can deform and displace along a first direction, and cause the plug body portion to expand and contract relative to the water pumping cavity to change the size of the pumping space; and a pressure ring is arranged in the mounting cavity, and can clamp the mounting portion together with the pump body.

[0009] Optionally, a stop surface is provided on the end surface of the pump body corresponding to the mounting portion, and the stop surface and the pressure ring are spaced apart in the first direction and jointly clamp the mounting portion in the first direction.

[0010] Optionally, the end face of the pump body is convexly provided with an outer ring rib and an inner ring rib, the outer ring rib is arranged on the outer periphery of the inner ring rib, and is spaced apart from the inner ring rib to form a first ring groove in a second direction, and the second direction is arranged to intersect with the first direction; the stop surface is configured as the bottom surface of the first ring groove, and the outer ring rib and the inner ring rib jointly clamp the mounting portion in the second direction.

[0011] Optionally, in the first direction, a protruding height H1 of the inner annular rib is greater than or equal to a thickness T1 of the mounting portion.

[0012] Optionally, T≥1mm, and / or, 1.5mm≤H1≤3mm.

[0013] Optionally, the inner wall surface of the installation cavity is provided with a step surface extending along the second direction, and the outer annular rib and the pressure ring abut against the step surface.

[0014] Optionally, the pump water cavity includes a driving cavity, the driving cavity has a telescopic cavity opening that passes through the end face of the pump body, an inner ring rib is protruding from the edge of the telescopic cavity opening, the mounting portion and the plug body portion are spaced apart along a second direction, the second direction is arranged to intersect with the first direction, the mounting portion is sleeved on the outer circumferential surface of the inner ring rib, and the plug body portion is arranged on the side of the inner ring rib away from the mounting portion.

[0015] Optionally, the pressure ring and the inner annular rib are at least partially arranged opposite to each other in the second direction, and jointly clamp part of the deformation portion in the second direction.

[0016] Optionally, the pressure ring includes a first ring segment and a second ring segment connected to each other, the first ring segment is arranged opposite to the inner ring rib, the second ring segment is arranged beyond the end surface of the inner ring rib, and the second ring segment and the deformation portion are spaced apart in the second direction.

[0017] Optionally, the peripheral side surface of the plug body is arranged in accordance with the driving cavity and can be at least partially adapted to be embedded in the driving cavity.

[0018] Optionally, the inner wall surface of the inner annular rib is provided with a flared surface section, and the flared surface section is obliquely extended in a direction close to the plug body and in a direction close to the mounting portion.

[0019] Optionally, the deformation portion includes a connected deformation ring segment and a deformation connecting segment, the deformation ring segment is arranged on the outer periphery of the inner ring rib and is connected to the mounting portion, and the deformation connecting segment connects the deformation ring segment and the plug body portion; when the plug body portion is in the extended limit position, the inner ring rib and the deformation connecting segment are spaced apart in the first direction.

[0020] Optionally, a maximum distance between the inner annular rib and the deformable connecting section in the first direction is greater than or equal to a displacement stroke of the deformable connecting section in the first direction.

[0021] Optionally, when the plug body is in the extended limit position, the deformation ring segment and the plug body are arranged opposite to each other and spaced apart in the second direction, and the inner ring rib and the plug body are partially arranged opposite to each other and spaced apart in the second direction.

[0022] Optionally, the mounting portion, the deformation portion and the plug body portion are integrally formed, and / or the elastic diaphragm is made of silicone.

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

[0024] Optionally, the oral irrigator further includes a mounting shell and a driving member, the mounting shell and the housing of the water pump are configured as the same structure, the driving member is disposed in the mounting cavity of the mounting shell, and is drivingly connected to the plug body of the elastic diaphragm of the water pump.

[0025] In the technical solution of the utility model, the mounting portion of the elastic diaphragm is clamped by the pressure ring and the pump body together to achieve installation and fixation of the elastic diaphragm on the pump body, replacing the bonding fixation method. This can avoid the problem of loosening or even failure of the bonding surface due to elastic deformation of the elastic diaphragm, thereby improving the installation reliability of the elastic diaphragm and reducing the risk of malfunction of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the tooth flosser of the utility model;

[0028] Figure 2 for Figure 1 A top view of the illustrated embodiment with the second shell portion hidden;

[0029] Figure 3 for Figure 2 The cross-sectional view at AA in the middle, at this time the second shell is unhidden;

[0030] Figure 4 for Figure 3 A partial cross-sectional view of the pump body, elastic diaphragm and pressure ring;

[0031] Figure 5 for Figure 2 An exploded view of the pump body, elastic diaphragm, pressure ring and first shell;

[0032] Figure 6 for Figure 2 Exploded view of the pump body, elastic diaphragm and pressure ring.

[0033] Description of Figure Numbers:

[0034]

[0035]

[0036] 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

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] A water flosser usually includes a nozzle, a water tank, a water pump and a driving component. The water pump is connected between the nozzle and the water tank. The water pump usually includes a pump body and an elastic diaphragm. The elastic diaphragm is driven and connected to the driving component so as to be able to undergo periodic elastic deformation relative to the driving cavity, thereby causing the water in the water tank to flow from the water tank into the pump body and then flow out of the nozzle from the pump body to complete the function of pumping water.

[0042] Among them, the elastic diaphragm is usually directly bonded to the pump body with adhesive. The elastic deformation of the elastic diaphragm will have a negative impact on the bonding surface. Therefore, the elastic diaphragm is prone to adhesion, loosening or even failure after long-term use, resulting in malfunction of the water pump.

[0043] The utility model provides a water pump, which is applied to a water flosser.

[0044] Please refer to Figures 1 to 6 In one embodiment of the water pump of the utility model, the water pump comprises:

[0045] The housing 301 has a mounting cavity 302;

[0046] The pump body 31 is disposed in the installation cavity 302 and has a water pump cavity 31a, a water inlet 31b and a water outlet 31c connected to the water pump cavity 31a;

[0047] The elastic diaphragm 32 is disposed in the water pumping cavity 31a. A pumping space is formed between the inner wall surface of the elastic diaphragm 32 and the cavity wall surface of the water pumping cavity 31a. 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 deformation portion 323 can deform and displace along a first direction and cause the plug portion 322 to expand and contract relative to the water pumping cavity 31a to change the size of the pumping space; and

[0048] The pressure ring 33 is disposed in the installation cavity 302 and can clamp the installation portion 321 together with the pump body 31 .

[0049] For details, please refer to Figures 1 to 3 The water flosser includes a mounting shell, a water pump 30, a driving member 101 and a transmission assembly, wherein the transmission assembly includes a driving gear 102, a driven gear 103 and a crank 104. The driving gear 102 is driven and arranged on the driving member 101, and the driven gear 103 is meshed and connected with the driving gear 102. One end of the crank 104 is eccentrically rotatably arranged on the end surface of the driven gear 103, and the other end of the crank 104 is connected to the elastic diaphragm 32, and can drive the elastic diaphragm 32 to undergo periodic elastic deformation relative to the pump body 31 to periodically change the size of the pumping space, thereby prompting water to flow into the pump water chamber 31a from the water inlet 31b, and then flow out of the pump water chamber 31a from the water outlet 31c, thereby completing the function of pumping water.

[0050] In the technical solution of the present utility model, the mounting portion 321 of the elastic diaphragm 32 is clamped by the pressure ring 33 and the pump body 31 to achieve the installation and fixation of the elastic diaphragm 32 on the pump body 31, replacing the bonding fixation method. This can avoid the problem of loosening or even failure of the bonding surface due to elastic deformation of the elastic diaphragm 32, thereby improving the installation reliability of the elastic diaphragm 32 and reducing the risk of functional abnormalities in the water pump 30.

[0051] Please refer to Figure 4 Optionally, a stop surface 31e is provided on the end surface of the pump body 31 corresponding to the mounting portion 321, and the stop surface 31e and the pressure ring 33 are spaced apart in the first direction, and jointly clamp the mounting portion 321 in the first direction. That is, at least a part of the clamping force applied to the mounting portion 321 by the pressure ring 33 and the pump body 31 acts in the first direction. In this way, the force exerted on the mounting portion 321 by the deformation portion 323 when deforming along the first direction can be overcome in a targeted manner, thereby improving the installation reliability of the mounting portion 321. Of course, in other embodiments, the stop surface 31e may not be provided, and the pressure ring 33 and the pump body 31 jointly clamp the mounting portion 321 along a second direction intersecting with the first direction.

[0052] Please refer to Figure 4Optionally, the end face of the pump body 31 is convexly provided with an outer ring rib 311 and an inner ring rib 312, the outer ring rib 311 is arranged on the outer periphery of the inner ring rib 312, and is spaced apart from the inner ring rib 312 in the second direction to form a first ring groove 313, and the second direction is arranged to intersect with the first direction; the stop surface 31e is configured as the groove bottom surface of the first ring groove 313, and the outer ring rib 311 and the inner ring rib 312 jointly clamp the mounting portion 321 in the second direction. That is, the two groove side walls of the first ring groove 313 jointly clamp the mounting portion 321, which can avoid the problem of sliding and shaking of the mounting portion 321 along the second direction, and improve the installation reliability and stability of the mounting portion 321. Of course, the outer ring rib 311 may not be provided, and only the inner ring rib 312 may be provided, and the pressure ring 33 may be elastically sleeved on the outer peripheral surface of the inner ring rib 312.

[0053] Optionally, in the first direction, the protruding height H1 of the inner annular rib 312 is greater than or equal to the thickness T1 of the mounting portion 321. Preferably, in order to make the mounting portion 321 of the elastic diaphragm 32 have a certain strength, the value T≥1mm. It should be noted that the thickness T1 of the mounting portion 321 refers to its thickness dimension in the first direction when it is in an uncompressed state. It can be understood that after the thickness of the mounting portion 321 is compressed in the first direction, its compressed thickness in the first direction is less than T1, that is, the protruding height of the inner annular rib 312 must be greater than the compressed thickness of the mounting portion 321. In this way, the pressing contact area of ​​the inner annular rib 312 on the mounting portion 321 can be increased, which is conducive to improving the installation reliability of the mounting portion 321. Of course, in other embodiments, the protruding height H1 of the inner annular rib 312 may be less than the thickness T1 of the mounting portion 321, or T1<1mm.

[0054] It can be understood that appropriately reducing the protruding height H1 of the inner annular rib 312 can allow the water pump 30 to have a larger tolerance range. Therefore, preferably, 1.5 mm ≤ H1 ≤ 3 mm.

[0055] Optionally, the inner wall surface of the installation cavity 302 is provided with a step surface 303 extending along the second direction, and the outer ring rib 311 and the pressure ring 33 abut against the step surface 303. In this way, by directly forming the step surface 303 on the inner wall surface of the installation cavity 302 to achieve the abutment and limiting of the pressure ring 33, the structure of the water pump 30 can be simplified, and the alignment installation of the installation ring can be facilitated.

[0056] Please refer to Figures 1 to 3 , Figure 5Optionally, the housing 301 includes a first housing portion 305 and a second housing portion 306 joined along the second direction, the mounting cavity 302 is formed at the joint of the first housing portion 305 and the second housing portion 306, a portion of the step surface 303 is formed on the first housing portion 305, and another portion is formed on the second housing portion 306. Specifically, when assembling the water pump 30, the pump body 31, the elastic diaphragm 32 and the pressure ring 33 are first assembled and embedded in the first housing portion 305, and the pressure ring 33 is abutted by the step surface 303 on the first housing portion 305, and then the second housing portion 306 is mounted on the first housing portion 305 along the second direction, and in this process, the step surface 303 on the second housing portion 306 also abuts against the pressure ring 33.

[0057] Please refer to Figure 4 Optionally, the pump water cavity 31a includes a driving cavity 31d, the driving cavity 31d has a telescopic cavity opening 31f that penetrates the end surface of the pump body 31, and the edge of the telescopic cavity opening 31f is convexly provided with an inner ring rib 312, the mounting portion 321 and the plug body portion 322 are spaced apart along the second direction, the mounting portion 321 is sleeved on the outer circumferential surface of the inner ring rib 312, and the plug body portion 322 is arranged on the side of the inner ring rib 312 away from the mounting portion 321. In this way, on the one hand, by sleeve-arranging the mounting portion 321 on the outer circumferential surface of the inner ring rib 312, the installation reliability of the mounting portion 321 can be improved. On the other hand, by separating the plug body portion 322 and the mounting portion 321 through the inner ring rib 312, it can be prevented that the plug body portion 322 touches the mounting portion 321 when performing telescopic movement, which can make the telescopic movement of the plug body portion 322 smoother and reduce the problem of slipping and installation failure of the mounting portion 321 due to being touched.

[0058] Please refer to Figure 4 Optionally, the pressure ring 33 and the inner ring rib 312 are at least partially arranged opposite to each other in the second direction, and they clamp the deformation part 323 together in the second direction. That is, the top of the inner ring rib 312 exceeds the end surface of the mounting part 321, and can clamp and limit the connection of the deformation part 323 to one end of the mounting part 321 to a certain extent, thereby further improving the installation reliability and stability of the elastic diaphragm 32. Of course, the pressure ring 33 and the inner ring rib 312 may not clamp the deformation part 323, and the two only clamp the mounting part 321.

[0059] Please refer to Figure 4Optionally, the pressure ring 33 includes a first ring segment and a second ring segment connected to each other, the first ring segment is arranged opposite to the inner ring rib 312, the second ring segment is arranged beyond the end face of the inner ring rib 312, and the second ring segment and the deformation portion 323 are arranged at intervals in the second direction. That is, the outer peripheral surface of the deformation portion 323 is divided into two areas, wherein the area close to the mounting portion 321 abuts against the pressure ring 33 (i.e., the first ring segment), and the area away from the mounting portion 321 does not abut against the pressure ring 33 (i.e., the second ring segment). In this way, the area where the deformation portion 323 touches, rubs and interferes with the pressure ring 33 during the elastic deformation process can be reduced, thereby reducing the risk of damage to the deformation portion 323 and improving the service life of the elastic diaphragm 32. Of course, in other embodiments, the first ring segment and the second ring segment may both abut against the outer peripheral surface of the deformation portion 323.

[0060] Please refer to Figure 4 and Figure 5 Optionally, the peripheral side surface of the plug body 322 is arranged in a conformal manner to the driving cavity 31d, and can be at least partially adapted to be embedded in the driving cavity 31d. That is, the plug body 322 of the diaphragm is similar in shape to the driving cavity 31d. In this way, it is helpful to reduce the dead zone and improve the pumping pressure and pumping efficiency. Of course, in other embodiments, the peripheral side surface of the plug body 322 may not conform to the inner wall surface of the driving cavity 31d, for example, the former is arranged in a roughly cylindrical shape, while the latter is arranged in a roughly elliptical cylindrical shape.

[0061] Optionally, the diameter of the plug body 322 ranges from 6 mm to 15 mm, such as 8 mm, 10 mm or 12 mm, and the diameter of the area of ​​the drive cavity 31d corresponding to the plug body 322 and the area surrounded by the inner wall surface of the inner ring rib 312 may be slightly larger than the diameter of the plug body 322, such as 6.2 mm to 15.2 mm. For example, in one embodiment, the diameter of the plug body 322 is 8 mm, then the diameter of the area of ​​the drive cavity 31d corresponding to the plug body 322 is 8.2 mm, and the diameter of the area surrounded by the inner wall surface of the inner ring rib 312 is 8.2 mm.

[0062] It can be understood that the plug body 322 reciprocates in the driving cavity 31d along the first direction, so the diameter of the plug body 322 should be smaller than the diameter of the corresponding part of the driving cavity 31d, and the size difference between the two should not be too large or too small. Specifically, on the one hand, if the size difference is too large, the dead zone or retention volume in the driving cavity 31d will be too large, which will affect the pumping efficiency of the water pump 30. On the other hand, 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 size difference is too small, the plug body 322 is prone to unnecessary friction with the pump body 31 during the movement, thereby affecting the life of the water pump 30.

[0063] Please refer to Figure 4 Optionally, the inner wall surface of the inner ring rib 312 is provided with a flared surface section 314, and the flared surface section 314 is obliquely extended in the direction close to the plug body portion 322 and in the direction close to the mounting portion 321. Specifically, optionally, the flared surface section 314 is provided at the top end of the inner ring rib 312, that is, the inner wall surface of the inner ring rib 312 is slightly expanded outward at least at the top end. In this way, it can play a certain guiding role on the plug body portion 322, so that the plug body portion 322 can be more smoothly extended into the driving cavity 31d. Of course, in other embodiments, the inner wall surface of the entire inner ring rib 312 can also be gradually expanded, for example, in the form of a frustum, or the flared surface section 314 is not provided.

[0064] Please refer to Figure 4 Optionally, the deformation portion 323 includes a deformation ring segment 324 and a deformation connection segment 325 connected to each other. The deformation ring segment 324 is arranged on the outer periphery of the inner ring rib 312 and connected to the mounting portion 321. The deformation connection segment 325 connects the deformation ring segment 324 and the plug body 322. When the plug body 322 is in the extended limit position, the inner ring rib 312 and the deformation connection segment 325 are arranged at intervals in the first direction. In this way, in the process of the plug body 322 moving from the extended limit position to the inserted limit position, the deformation connection segment 325 gradually approaches the top of the inner ring rib 312. At this time, the interval between the inner ring rib 312 and the deformation connection segment 325 in the first direction plays a buffering role, which can reduce the risk of damage or even breakage of the deformation connection segment 325 due to continuous contact and friction with the inner ring rib 312.

[0065] Optionally, the maximum spacing between the inner ring rib 312 and the deformable connecting section 325 in the first direction is greater than or equal to the displacement stroke of the deformable connecting section 325 in the first direction. That is, in the process of the plug body 322 moving from the extended limit position to the extended limit position, the deformable connecting section 325 will not touch the top of the inner ring rib 312 throughout the entire process. In this way, the problem of the inner ring rib 312 touching and breaking the deformable connecting section 325 during the deformation and displacement of the elastic diaphragm 32 can be avoided. In this embodiment, the displacement stroke of the deformable connecting section 325 in the first direction ranges from 1.8 mm to 5 mm, for example, 2.5 mm, 3.5 mm or 4 mm.

[0066] Please refer to Figure 4 Optionally, when the plug body 322 is at the extended limit position, the deformation ring segment 324 and the plug body 322 are arranged opposite to each other and spaced apart in the second direction, and the inner ring rib 312 and the plug body 322 are arranged opposite to each other and spaced apart in the second direction. In this way, the elastic diaphragm 32 can be ensured to have good elastic deformation ability, and the smoothness and stability of the telescopic displacement of the plug body 322 in the driving cavity 31d can be improved.

[0067] Optionally, the mounting portion 321, the deformation portion 323 and the plug body portion 322 are integrally formed, so that the structure of the elastic diaphragm 32 can be simplified and its manufacturing cost can be reduced, and it is also beneficial to ensure the connection strength between the mounting portion 321, the deformation portion 323 and the plug body portion 322. In this embodiment, preferably, the material of the elastic diaphragm 32 is configured as silicone. Of course, in some embodiments, the material of the elastic diaphragm 32 can also be configured as rubber or other materials with elastic deformation properties. In other embodiments, at least one of the mounting portion 321, the deformation portion 323 and the plug body portion 322 can also be separately formed.

[0068] Please refer to Figures 1 to 3 The utility model also proposes a water flosser, which includes the aforementioned water pump 30. The specific structure of the water pump 30 refers to the above-mentioned embodiment. Since the water flosser 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.

[0069] Optionally, the oral irrigator further includes a mounting shell and a driving member 101, the mounting shell and the housing 301 of the water pump 30 are configured as the same structure, the driving member 101 is arranged in the mounting cavity 302 of the mounting shell, and is drivingly connected to the plug body 322 of the elastic diaphragm 32 of the water pump 30. In this way, the structure of the oral irrigator can be simplified and its manufacturing cost can be reduced. Of course, in other embodiments, the mounting shell and the housing 301 of the water pump 30 can also be configured as two parts.

[0070] 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 water pump, used in a water flosser, characterized in that: The water pump comprises: A housing having a mounting cavity; A pump body, arranged in the installation cavity, and comprising a water pump cavity, a water inlet and a water outlet communicated with the water pump cavity; an elastic diaphragm disposed in the water pumping cavity, wherein a pumping space is formed between an inner wall surface of the elastic diaphragm and a cavity wall surface of the water pumping cavity, wherein the elastic diaphragm comprises a mounting portion, a plug body portion, and a deforming portion connecting the mounting portion and the plug body portion, wherein the deforming portion is capable of deforming and displacing along a first direction and causing the plug body portion to expand and contract relative to the water pumping cavity to change the size of the pumping space; and A pressure ring is arranged in the installation cavity and can clamp the installation portion together with the pump body.

2. The water pump according to claim 1, characterized in that A stop surface is provided on the end surface of the pump body corresponding to the mounting portion. The stop surface and the pressure ring are spaced apart in the first direction and jointly clamp the mounting portion in the first direction.

3. The water pump according to claim 2, characterized in that: The end surface of the pump body is convexly provided with an outer ring rib and an inner ring rib, the outer ring rib is arranged on the outer periphery of the inner ring rib, and is spaced apart from the inner ring rib to form a first ring groove in a second direction, and the second direction is arranged to intersect with the first direction; the stop surface is configured as the bottom surface of the first ring groove, and the outer ring rib and the inner ring rib jointly clamp the mounting portion in the second direction.

4. The water pump according to claim 3, characterized in that: In the first direction, a protruding height H1 of the inner annular rib is greater than or equal to a thickness T1 of the mounting portion.

5. The water pump according to claim 4, characterized in that T≥1mm, and / or, 1.5mm≤H1≤3mm.

6. The water pump according to claim 3, characterized in that: The inner wall surface of the installation cavity is provided with a step surface extending along the second direction, and the outer annular rib and the pressure ring abut against the step surface.

7. The water pump according to claim 1, characterized in that The water pump cavity includes a driving cavity, which has a telescopic cavity opening that passes through the end surface of the pump body, and an inner ring rib is protruding from the edge of the telescopic cavity opening. The mounting portion and the plug body portion are spaced apart along a second direction, and the second direction is arranged to intersect with the first direction. The mounting portion is sleeved on the outer circumferential surface of the inner ring rib, and the plug body portion is arranged on a side of the inner ring rib away from the mounting portion.

8. The water pump according to claim 7, characterized in that The pressure ring and the inner annular rib are at least partially arranged opposite to each other in the second direction, and jointly clamp a portion of the deformation portion in the second direction.

9. The water pump according to claim 8, characterized in that The pressure ring includes a first ring segment and a second ring segment connected to each other, the first ring segment is arranged opposite to the inner ring rib, the second ring segment is arranged beyond the end surface of the inner ring rib, and the second ring segment and the deformation portion are spaced apart in the second direction.

10. The water pump according to claim 7, characterized in that The peripheral side surface of the plug body is arranged in accordance with the driving cavity and can be at least partially adapted to be embedded in the driving cavity.

11. The water pump according to claim 10, characterized in that The inner wall surface of the inner annular rib is provided with a flared surface section, and the flared surface section is obliquely extended in a direction close to the plug body and in a direction close to the mounting portion.

12. The water pump according to claim 7, characterized in that The deformation portion includes a connected deformation ring segment and a deformation connecting segment, the deformation ring segment is arranged on the outer periphery of the inner ring rib and is connected to the mounting portion, and the deformation connecting segment connects the deformation ring segment and the plug body portion; when the plug body portion is in the extended limit position, the inner ring rib and the deformation connecting segment are spaced apart in the first direction.

13. The water pump according to claim 12, characterized in that The maximum distance between the inner annular rib and the deformable connecting section in the first direction is greater than or equal to the displacement stroke of the deformable connecting section in the first direction.

14. The water pump according to claim 12, characterized in that When the plug body is in the extended limit position, the deformation ring segment and the plug body are arranged opposite to each other and spaced apart in the second direction, and the inner ring rib and the plug body are partially arranged opposite to each other and spaced apart in the second direction.

15. The water pump according to claim 1, characterized in that The mounting portion, the deformation portion and the plug body are integrally formed, and / or the elastic diaphragm is made of silicone.

16. A dental flosser, characterized in that: Comprising a water pump as claimed in any one of claims 1 to 15.

17. The oral rinser according to claim 16, characterized in that: The water flosser also includes a mounting shell and a driving member. The mounting shell and the housing of the water pump are configured as the same structure. The driving member is arranged in the mounting cavity of the mounting shell and is drivingly connected to the plug body of the elastic diaphragm of the water pump.

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