Water pump and oral irrigator

Abstract

The utility model discloses a water pump and an oral irrigator, and the water pump comprises a pump body and a diaphragm piece, the pump body is provided with a mounting opening, and a mounting groove is formed in the outer side of the mounting opening. A pressure applying cavity is defined by the diaphragm piece and the pump body, the diaphragm piece comprises a movable part and an extension part surrounding the periphery of the movable part, one end of the extension part is connected with the movable part, and the other end of the extension part is arranged in the mounting groove in a sealed mode; wherein the movable part is provided with a pressure applying surface far away from the joint of the extension part and the movable part, and the middle part of the pressure applying surface protrudes out of the edge part of the pressure applying surface. According to the water pump, water pumping dead zones can be reduced, and water pumping efficiency is improved.

Description

Technical Field

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

[0002] As people's awareness of hygiene increases, more and more people choose to use water flossers to clean their mouths. Water flossers use a water pump to pressurize the liquid so that the liquid flows from the water outlet of the water pump into the water outlet channel, and then is ejected from the nozzle of the water flosser at high speed through the water outlet channel, directly acting on the user's teeth and interdental spaces, and using the impact force of the high-speed liquid to achieve the purpose of cleaning the mouth. Among them, diaphragm pumps have been widely used in water flossers, but the relevant diaphragm pumps are either complex in structure or have low reliability, there is a dead zone between the diaphragm pump and the pump body, and the pumping efficiency is low, which is difficult to meet the current industry development needs. Utility Model Content

[0003] The main purpose of the utility model is to provide a water pump, aiming to reduce the dead zone of water pumping and improve the water pumping efficiency.

[0004] To achieve the above-mentioned purpose, the utility model proposes a water pump, which includes a pump body and a diaphragm; the pump body is provided with a mounting port, and a mounting groove is formed on the outer side of the mounting port; the diaphragm and the pump body are combined to form a pressure chamber, and the diaphragm includes a movable part, and an extension part surrounding the outer periphery of the movable part, one end of the extension part is connected to the movable part, and the other end is sealed in the mounting groove; wherein the movable part has a pressure surface away from the connection between the extension part and the movable part, and the middle part of the pressure surface protrudes from the edge part of the pressure surface.

[0005] In one embodiment, the shape of the diaphragm is similar to the shape of the pressure chamber.

[0006] In one embodiment, the pressure chamber includes a first pump chamber and a second pump chamber that are connected to each other, the pump body forms the first pump chamber, the diaphragm member forms the second pump chamber, the first pump chamber has a chamber bottom away from the movable part; the movable part has a first position away from the chamber bottom of the first pump chamber, and a second position close to the chamber bottom of the first pump chamber, and the movable part can be switched back and forth between the first position and the second position; when the movable part is in the second position, the volume of the movable part extending into the first pump chamber is not less than 80% of the volume of the first pump chamber.

[0007] In one embodiment, the movable portion further has a bottom surface opposite to the pressure surface, and in the length direction of the pump body, the difference between the maximum distance from the bottom surface to the pressure surface and the minimum distance from the bottom surface to the pressure surface ranges from 2mm to 4mm.

[0008] In one embodiment, the pressure-applying surface is a conical surface or a curved surface.

[0009] In one embodiment, a guide surface is formed in the pressure chamber, the guide surface forms an angle α with the axis of the pump body, and the conical surface forms an angle β with the axis of the pump body, satisfying α<β.

[0010] In one embodiment, the α satisfies 50°≤α≤70°, and the β satisfies 60°≤β≤80°.

[0011] In one embodiment, the outer diameter of the movable portion is smaller than the inner diameter of the installation opening.

[0012] In one embodiment, the difference between the outer diameter of the movable portion and the inner diameter of the mounting opening is 0.1 mm-1.2 mm.

[0013] In one embodiment, the outer diameter of the movable portion ranges from 6 mm to 15 mm, and / or the inner diameter of the mounting opening ranges from 6.2 mm to 15.2 mm.

[0014] In one embodiment, the pump body is further provided with a water inlet, a water outlet and a water flow channel, the water inlet, the water outlet and the installation port are connected through the water flow channel, and the movable part at least partially extends into the installation port.

[0015] In one embodiment, the water flow channel includes a first flow channel and a second flow channel that are connected, one end of the first flow channel is connected to the water inlet, and the other end is connected to the second flow channel, one end of the second flow channel is connected to the water outlet, and the other end is connected to the installation port, and the cross-sectional area of ​​the second flow channel near the water outlet is smaller than the cross-sectional area of ​​the second flow channel near the installation port.

[0016] In one embodiment, the pressure chamber includes a first pump chamber and a second pump chamber that are connected to each other, the pump body forms the first pump chamber, the diaphragm member forms the second pump chamber, the first pump chamber has a chamber bottom away from the movable part; the movable part has a first position away from the chamber bottom of the first pump chamber, and a second position close to the chamber bottom of the first pump chamber, the movable part can be switched back and forth between the first position and the second position; when the movable part moves to the second position, the movable part at least partially extends into the water flow channel.

[0017] In one embodiment, the extension portion includes a deformation portion and a pressing portion, one end of the deformation portion is connected to the movable portion, and the other end is connected to the pressing portion, and the pressing portion is limitedly disposed in the installation groove.

[0018] In one embodiment, the mounting groove has a first annular wall and a second annular wall, the second annular wall is located on the outer side of the first annular wall, and the mounting groove is formed between the first annular wall and the second annular wall; the pressing portion is formed by extending outward from an end of the deformation portion away from the movable portion, and the water pump also includes a pressure ring, which is arranged in the mounting groove and presses the deformation portion and the pressing portion tightly.

[0019] In one embodiment, in the length direction of the pump body, the height of the first annular wall is H, and the thickness of the pressing portion is T, satisfying H≥T.

[0020] In one embodiment, the T satisfies 1mm≤T≤3mm, and the H satisfies 1.5mm≤H≤3.5mm.

[0021] In one embodiment, the pressure chamber includes a first pump chamber and a second pump chamber that are connected to each other, the pump body forms the first pump chamber, the diaphragm forms the second pump chamber, the first pump chamber has a chamber bottom away from the movable part; the movable part has a first position away from the chamber bottom of the first pump chamber, and a second position close to the chamber bottom of the first pump chamber, and the movable part can reciprocate between the first position and the second position; when the movable part is in the first position, the distance between the deformation part and the end of the first annular wall is greater than the distance the movable part moves when switching between the first position and the second position.

[0022] In one embodiment, the diaphragm member further includes a connecting portion connected to the movable portion, and the connecting portion is used to be connected to a cam mechanism.

[0023] The utility model also proposes a water flosser, which includes the water pump. The water pump includes a pump body and a diaphragm; the pump body is provided with a mounting port, and a mounting groove is formed on the outside of the mounting port; the diaphragm and the pump body are combined to form a pressure chamber, and the diaphragm includes a movable part and an extension part surrounding the outer periphery of the movable part, one end of the extension part is connected to the movable part, and the other end is sealed in the mounting groove; wherein the movable part has a pressure surface away from the connection between the extension part and the movable part, and the middle part of the pressure surface protrudes from the edge part of the pressure surface.

[0024] The technical solution of the utility model is to set the middle part of the pressure surface of the diaphragm to be a protruding edge part of the pressure surface, wherein the protruding middle part occupies more space in the pressure chamber, and the movable part occupies more space in the pressure chamber during the movement, especially when it moves to the extreme position, so that the water in the pump body can be fully pumped out, which is beneficial to reduce the dead zone of water pumping and improve the water pumping pressure and water pumping efficiency. 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 It is a structural schematic diagram of a part of the structure of the water flosser of the utility model;

[0027] Figure 2 for Figure 1 A cross-sectional view of the structure;

[0028] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0029] Figure 4 This is a schematic structural diagram of an embodiment of a water pump of the utility model;

[0030] Figure 5 for Figure 4 A schematic diagram of a structure in which part of the structure is removed;

[0031] Figure 6 for Figure 5 The enlarged view of point B in the middle;

[0032] Figure 7 It is a structural schematic diagram of an embodiment of the pump body of the utility model;

[0033] Figure 8 It is a structural schematic diagram of an embodiment of the diaphragm component of the utility model.

[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 if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications 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 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, if the meaning of "and / or" appearing in the full text is to include 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] The utility model provides an embodiment of a water pump, which is mainly used in water flossers.

[0042] See also Figures 4 to 8 In one embodiment of the utility model, the water pump includes a pump body 100 and a diaphragm 200; the pump body 100 is provided with a mounting port 110, and a mounting groove 120 is formed on the outer side of the mounting port 110; the diaphragm 200 and the pump body 100 enclose a pressure chamber 160, and the diaphragm 200 includes a movable part 210, and an extension part 220 surrounding the outer periphery of the movable part 210, one end of the extension part 220 is connected to the movable part 210, and the other end is sealed in the mounting groove 120; wherein the movable part 210 has a pressure surface 211 away from the connection between the extension part 220 and the movable part 210, and the middle part of the pressure surface 211 protrudes from the edge part of the pressure surface 211.

[0043] Specifically, the pump body 100 is provided with a water inlet 130, a water outlet 140 and a mounting port 110. The water inlet 130 and the water outlet 140 are used to respectively install the water inlet joint and the water outlet joint. A mounting groove 120 is formed on the outer side of the mounting port 110. The mounting groove 120 is used to set the diaphragm 200 so that the diaphragm 200 and the pump body 100 enclose a pressure chamber 160. The diaphragm 200 provides power for pumping water by moving in the pressure chamber 160.

[0044] The diaphragm member 200 includes a movable portion 210 and an extension portion 220 surrounding the outer periphery of the movable portion 210, wherein one end of the extension portion 220 is sealed in the mounting groove 120 to connect the diaphragm member 200 and the pump body 100 together, and the movable portion 210 is arranged corresponding to the mounting port 110 and is movable. During the movement of the movable portion 210, the volume of the pressure chamber 160 changes, and the pressure in the chamber changes accordingly, thereby providing pump water power.

[0045] The movable part 210 has a pressure surface 211 away from the connection between the extension part 220 and the movable part 210, and the middle part of the pressure surface 211 protrudes from the edge part of the pressure surface 211. In other words, the middle part of the movable part 210 on the side opposite to the installation port 110 protrudes from the edge part of the pressure surface 211, and the protruding part occupies more space in the pressure chamber 160. When the movable part 210 moves, especially when it moves to the extreme position, it occupies more space in the pressure chamber 160, which can fully pump out the water in the pump body 100, which is beneficial to reduce the dead zone of water pumping and improve the water pumping pressure and water pumping efficiency. It should be noted that the shape of the middle protruding part of the pressure surface 211 can be a more regular shape, such as an arc, a cone, or an irregular shape, and there is no specific limitation on this.

[0046] Furthermore, the pump body 100 further includes a water passage 150, through which the water inlet 130, the water outlet 140 and the mounting opening 110 are connected, and the movable portion 210 at least partially extends into the mounting opening 110. The portion of the movable portion 210 extending into the mounting opening 110 can play a role of limiting and guiding, so as to prevent the movable portion 210 from being separated from the mounting opening 110 or the moving direction from being offset during the moving process.

[0047] In one embodiment, the diaphragm 200 is a rubber member. Rubber has good elasticity and strength, so that the diaphragm 200 can produce a certain degree of extrusion deformation and is not easy to be broken.

[0048] See also Figures 3 to 6 In one embodiment, the shape of the diaphragm 200 is similar to that of the pressure chamber 160. Specifically, the pressure chamber 160 includes a first pump chamber 161 and a second pump chamber 162 which are connected to each other. The pump body 100 forms the first pump chamber 161, and the diaphragm 200 forms the second pump chamber 162. The first pump chamber 161 has a chamber bottom away from the movable portion 210. The shape of the diaphragm 200 is similar to that of the pressure chamber 160. It can be understood that the movable portion 210 of the diaphragm 200 is similar to the shape of the first pump chamber 161 of the pressure chamber 160. Such a configuration can reduce the dead zone of water pumping to a greater extent, and improve the water pumping pressure and water pumping efficiency.

[0049] See also Figure 5In one embodiment, the pressure chamber 160 includes a first pump chamber 161 and a second pump chamber 162 that are connected to each other. The pump body 100 forms the first pump chamber 161, and the diaphragm 200 forms the second pump chamber 162. The first pump chamber 161 has a chamber bottom away from the movable part 210; the movable part 210 has a first position away from the chamber bottom of the first pump chamber 161, and a second position close to the chamber bottom of the first pump chamber 161, and the movable part 210 can be switched back and forth between the first position and the second position; when the movable part 210 is in the second position, the volume of the movable part 210 extending into the first pump chamber 161 is not less than 80% of the volume of the first pump chamber 161.

[0050] Specifically, the first pump chamber 161 is formed by the pump body 100, and the second pump chamber 162 is formed between the movable portion 210 and the extension portion 220 of the diaphragm 200, and the first pump chamber 161 and the second pump chamber 162 are connected. The first pump chamber 161 has a chamber bottom away from the movable portion 210, and the chamber bottom is opposite to the mounting port 110. The movable portion 210 switches back and forth between the first position and the second position to change the pressure in the pressure chamber 160, thereby providing water pumping power. It should be noted that when the movable portion 210 moves from the first position to the second position, it is a water pumping action, that is, the water in the pump body 100 is pumped out through the water outlet 140; when the movable portion 210 moves from the second position to the first position, it is a water pumping action, that is, the external water is pumped into the pump body 100. When the movable part 210 is in the second position, that is, after the movable part 210 pumps the water in the pump body 100 out through the water outlet 140, the volume of the movable part 210 extending into the first pump chamber 161 is not less than 80% of the volume of the first pump chamber 161, so as to ensure that the volume of the movable part 210 extending into the first pump chamber 161 is large, reduce the dead zone of pumping water, and improve the pumping pressure and pumping efficiency. The volume of the movable part 210 extending into the first pump chamber 161 can be 80%, 82%, 84%, 85%, 86%, 88%, 90% or 95% of the volume of the first pump chamber 161.

[0051] See also Figure 5In one embodiment, the movable portion 210 further has a bottom surface 212 opposite to the pressure surface 211. In the length direction of the pump body 100, the difference between the maximum distance from the bottom surface 212 to the pressure surface 211 and the minimum distance from the bottom surface 212 to the pressure surface 211 is in the range of 2mm-4mm. Specifically, the maximum distance from the bottom surface 212 to the pressure surface 211 can be understood as the height of the protrusion of the middle part of the pressure surface 211, and the minimum distance from the bottom surface 212 to the pressure surface 211 can be understood as the distance from the edge of the pressure surface 211 to the bottom surface 212, or the thickness of the movable portion 210 when it does not have a protruding portion. The difference between the maximum distance from the bottom surface 212 to the pressure surface 211 and the minimum distance from the bottom surface 212 to the pressure surface 211 can be understood as the height of the middle part of the pressure surface 211 protruding compared to the edge part, and the height of the protrusion ranges from 2mm to 4mm, and can be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm. Within this range, it can match the shape of the first pump chamber 161 to improve the pumping efficiency.

[0052] Please continue reading Figure 5 In one embodiment, the pressure surface 211 is a conical surface or a curved surface. Specifically, the curved surface can be, for example, an arc surface, a table surface, a corrugated surface, etc. Further, a guide surface 163 is formed in the pressure chamber 160, and the guide surface 163 forms an angle α with the axis of the pump body 100. When the pressure surface 211 is a conical surface, the conical surface forms an angle β with the axis of the pump body 100, satisfying α<β. Considering that when external water flows into the pump body 100, it will also flow into the pressure chamber 160, the guide surface 163 in the pressure chamber 160 can provide a diversion effect for the water flow when it is pumped out of the pump body 100, while avoiding pressure loss. The guide surface 163 forms an angle α with the axis of the pump body 100, and the conical surface forms an angle β with the axis of the pump body 100, satisfying α<β, wherein the angle α is larger to achieve a better diversion effect.

[0053] Furthermore, α satisfies 50°≤α≤70°, and β satisfies 60°≤β≤80°. The angle of α can be 50°, 55°, 60°, 65°, 70°, and the angle of β can be 60°, 65°, 70°, 75°, 80°, and it is only necessary to ensure that the angle value of β is always greater than the angle value of α.

[0054] See also Figures 4 to 6In one embodiment, the outer diameter of the movable portion 210 is smaller than the inner diameter of the mounting port 110. It is easy to understand that the movable portion 210 of the diaphragm 200 can reciprocate in the first chamber, so the outer diameter of the movable portion 210 should be smaller than the inner diameter of the mounting port 110. At the same time, it should be noted that the size difference between the outer diameter of the movable portion 210 and the inner diameter of the mounting port 110 cannot be too large. If it is too large, the amount of liquid flowing into the second chamber will be too large, and the liquid retention volume in the dead zone of the pump body 100 will be too large, affecting the pumping efficiency; on the other hand, if the size difference is too small, the diaphragm may generate unnecessary friction with the inner wall surface of the first chamber during movement, thereby affecting the life of the water pump.

[0055] In one embodiment, the difference between the outer diameter of the movable part 210 and the inner diameter of the mounting opening 110 is 0.1 mm-1.2 mm. The difference between the outer diameter of the movable part 210 and the inner diameter of the mounting opening 110 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm. Considering the error in the production of the pump body 100 and the diaphragm 200, the difference between the outer diameter of the movable part 210 and the inner diameter of the mounting opening 110 can be an integer and be identified as the above exemplary difference.

[0056] In another embodiment, the outer diameter range of the movable part 210 is 6mm-15mm, and / or the inner diameter range of the mounting port 110 is 6.2mm-15.2mm. Specifically, the outer diameter range of the movable part 210 can be 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm. The inner diameter range of the mounting port 110 can be 6.2mm, 6.5mm, 7mm, 7.2mm, 8mm, 8.2mm, 9mm, 9.2mm, 10mm, 10.2mm, 11mm, 12mm, 13mm, 14mm, 15mm, 15.2mm. Similarly, considering the errors in the production of the pump body 100 and the diaphragm 200, the outer diameter range of the movable part 210 and the inner diameter range of the mounting port 110 can be roughly equal to the above ranges.

[0057] See also Figures 4 to 7In one embodiment, the water flow channel 150 includes a first flow channel 151 and a second flow channel 152 that are connected to each other. One end of the first flow channel 151 is connected to the water inlet 130, and the other end is connected to the second flow channel 152. One end of the second flow channel 152 is connected to the water outlet 140, and the other end is connected to the installation port 110. The cross-sectional area of ​​the second flow channel 152 near the water outlet 140 is smaller than the cross-sectional area of ​​the second flow channel 152 near the installation port 110. Specifically, the cross-sectional area of ​​the second flow channel 152 decreases from one end of the installation port 110 toward one end of the water outlet 140, so that the pump body 100 can smoothly inlet water and the water outlet pressure is sufficient.

[0058] See also Figure 4 Zhihe Figure 5 In one embodiment, the pressure chamber 160 includes a first pump chamber 161 and a second pump chamber 162 that are connected to each other. The pump body 100 forms the first pump chamber 161, and the diaphragm 200 forms the second pump chamber 162. The first pump chamber 161 has a chamber bottom away from the movable part 210; the movable part 210 has a first position away from the chamber bottom of the first pump chamber 161, and a second position close to the chamber bottom of the first pump chamber 161. The movable part 210 can switch back and forth between the first position and the second position; when the movable part 210 moves to the second position, the movable part 210 at least partially extends into the water flow channel 150.

[0059] Specifically, the description of the first pump chamber 161, the second pump chamber 162, and the first position and the second position refers to the description of the other embodiments mentioned above, and will not be repeated here. The movable part 210 has a pressure surface 211 away from the connection between the extension part 220 and the movable part 210, and the middle part of the pressure surface 211 protrudes from the edge part of the pressure surface 211, wherein the middle protruding part of the pressure surface 211 can be a convex part with a certain shape, and the outer diameter of the protruding part is smaller than the inner diameter of the water flow channel 150. When the movable part 210 moves to the second position, the movable part 210 at least partially extends into the water flow channel 150, that is, when the movable part 210 moves to the second position, the convex part in the middle of the pressure surface 211 of the movable part 210 can extend into the water flow channel 150. With this design, the water in the pump body 100 can be pumped out to the greatest extent, thereby improving the water pumping efficiency.

[0060] See also Figure 5 and Figure 8In one embodiment, the extension portion 220 includes a deformation portion 221 and a pressing portion 222. One end of the deformation portion 221 is connected to the movable portion 210, and the other end is connected to the pressing portion 222. The pressing portion 222 is limitedly disposed in the mounting groove 120. Specifically, when the movable portion 210 moves between the first position and the second position, the deformation portion 221 can be deformed as the movable portion 210 moves. The pressing portion 222 is sealed and limitedly disposed in the mounting groove 120 to ensure the stability and sealing of the connection between the diaphragm 200 and the body.

[0061] See also Figure 5 and Figure 7 It should be noted that the mounting groove 120 has a first annular wall 121 and a second annular wall 122, the second annular wall 122 is located on the outer side of the first annular wall 121, and the mounting groove 120 is formed between the first annular wall 121 and the second annular wall 122; the pressing portion 222 is formed by extending outward from one end of the deformation portion 221 away from the movable portion 210, and the water pump also includes a pressure ring 300, which is arranged in the mounting groove 120 and presses the deformation portion 221 and the pressing portion 222 tightly. Specifically, the pressure ring 300 can limit the position of the pressing portion 222 in the axial direction of the water pump. At the same time, the pressure ring 300 is arranged in the installation groove 120. Through the joint action of the pressure ring 300 and the first ring wall 121 and the second ring wall 122, the deformation portion 221 can be limited in the radial direction of the water pump, thereby enhancing the fixing effect of the diaphragm 200 and further preventing the movable portion 210 of the diaphragm 200 from pulling the extension portion 220 outward when switching between the first position and the second position, thereby escaping from the installation groove 120.

[0062] See also Figure 6 Further, in the length direction of the pump body 100, the height of the first annular wall 121 is H, and the thickness of the pressing portion 222 is T, satisfying H≥T. This arrangement is to further enhance the fixing effect of the diaphragm 200 and prevent the extension portion 220 of the diaphragm 200 from falling out of the mounting groove 120. Preferably, the height H of the first annular wall 121 is greater than the thickness T of the pressing portion 222.

[0063] Furthermore, T satisfies 1mm≤T≤3mm, and H satisfies 1.5mm≤H≤3.5mm. Specifically, in order to make the diaphragm have a certain strength, the thickness T of the pressing portion 222 is usually greater than or equal to 1mm. At the same time, in order to avoid the pressing portion 222 being too thick and affecting the pressing effect of the pressure ring 300, the thickness T of the pressing portion 222 is usually less than or equal to 3mm. The thickness T of the pressing portion 222 can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm. The height H of the first ring wall 121 can be 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm. More preferably, T=1.5mm, 1.5mm≤H≤3mm. It can be understood that appropriately reducing the height of the first ring wall 121 can give the water pump a larger tolerance range.

[0064] See also Figures 4 to 6 In one embodiment, the pressure chamber 160 includes a first pump chamber 161 and a second pump chamber 162 that are connected to each other. The pump body 100 forms the first pump chamber 161, and the diaphragm 200 forms the second pump chamber 162. The first pump chamber 161 has a chamber bottom away from the movable part 210; the movable part 210 has a first position away from the chamber bottom of the first pump chamber 161, and a second position close to the chamber bottom of the first pump chamber 161, and the movable part 210 can switch back and forth between the first position and the second position; when the movable part 210 is in the first position, the distance between the deformation part 221 and the end of the first annular wall 121 is greater than the distance that the movable part 210 moves when switching between the first position and the second position.

[0065] Specifically, the description of the first pump chamber 161, the second pump chamber 162, and the first position and the second position refers to the description of the other aforementioned embodiments, and will not be repeated here. When the movable part 210 is in the first position, the distance between the deformation part 221 and the end of the first annular wall 121 is greater than the distance that the movable part 210 moves when switching between the first position and the second position. In other words, the length of the deformable moving part of the deformation part 221 is greater than the stroke of the movable part 210, so as to avoid the end of the first annular wall 121 applying force to the moving part of the deformation part 221 to break the deformation part 221 during the movement of the movable part 210. The stroke range of the water pump in this embodiment can be 1.8mm-5mm, preferably 3.5mm.

[0066] See also Figures 2 to 6 , Figure 8 In one embodiment, the diaphragm member 200 further includes a connecting portion 230 connected to the movable portion 210, and the connecting portion 230 is used to connect to the cam mechanism 12 (see Figure 3Specifically, the diaphragm member 200 is further provided with a connecting portion 230, and the cam mechanism 12 is fixedly connected to the connecting portion 230. When the cam mechanism 12 is working, it can drive the connecting portion 230 to move, thereby driving the movable portion 210 to switch between the first position and the second position.

[0067] The technical solution of the present invention is to set the middle part of the pressure surface 211 of the diaphragm 200 to be a protruding edge part of the pressure surface 211, wherein the protruding middle part occupies more space in the pressure chamber 160. When the movable part 210 moves, especially when it moves to the extreme position, it occupies more space in the pressure chamber 160, which can fully pump out the water in the pump body 100, which is beneficial to reduce the dead zone of water pumping and improve the water pumping pressure and water pumping efficiency.

[0068] See also Figures 1 to 3 The utility model also proposes a water flosser, which includes the aforementioned water pump. The specific structure of the water pump 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. Furthermore, the water flosser includes a main body (not shown in the figure), and a nozzle 11 detachably connected to the main body. The aforementioned water pump, as well as a cam mechanism 12, a drive motor 13, etc. are arranged in the main body (please refer to Figure 2 The water pump, cam mechanism 12 and drive motor 13 can be assembled together in the pump housing 14 to reasonably utilize the installation space in the main body and ensure the compactness of the installation of parts. At the same time, the pump housing 14 also protects and limits the water pump, cam mechanism 12 and drive motor 13.

[0069] 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, characterized in that: The water pump comprises: The pump body is provided with a mounting opening, and a mounting groove is formed on the outer side of the mounting opening; and A diaphragm member, wherein the diaphragm member and the pump body together form a pressure chamber, wherein the diaphragm member includes a movable portion, and an extension portion surrounding the outer periphery of the movable portion, wherein one end of the extension portion is connected to the movable portion, and the other end is sealed in the mounting groove; wherein the movable portion has a pressure surface away from the connection between the extension portion and the movable portion, and the middle portion of the pressure surface protrudes from the edge portion of the pressure surface.

2. The water pump according to claim 1, characterized in that The shape of the diaphragm is similar to that of the pressure chamber.

3. The water pump according to claim 1, characterized in that: The pressure chamber comprises a first pump chamber and a second pump chamber which are connected to each other. The pump body forms the first pump chamber, and the diaphragm member forms the second pump chamber. The first pump chamber has a chamber bottom away from the movable portion. The movable portion has a first position away from the chamber bottom of the first pump chamber, and a second position close to the chamber bottom of the first pump chamber. The movable portion can be reciprocated between the first position and the second position. When the movable portion is at the second position, the volume of the movable portion extending into the first pump chamber is not less than 80% of the volume of the first pump chamber.

4. The water pump according to claim 1, characterized in that The movable part also has a bottom surface opposite to the pressure surface. In the length direction of the pump body, the difference between the maximum distance from the bottom surface to the pressure surface and the minimum distance from the bottom surface to the pressure surface ranges from 2mm to 4mm.

5. The water pump according to claim 1, characterized in that: The pressure-applying surface is a conical surface or a curved surface.

6. The water pump according to claim 5, characterized in that A guide surface is formed in the pressure chamber, the guide surface forms an angle α with the axis of the pump body, and the conical surface forms an angle β with the axis of the pump body, satisfying α<β.

7. The water pump according to claim 6, characterized in that The α satisfies 50°≤α≤70°, and the β satisfies 60°≤β≤80°.

8. The water pump according to any one of claims 1 to 7, characterized in that: The outer diameter of the movable portion is smaller than the inner diameter of the mounting opening.

9. The water pump according to claim 8, characterized in that The difference between the outer diameter of the movable portion and the inner diameter of the mounting opening is 0.1 mm to 1.2 mm.

10. The water pump according to claim 8, characterized in that The outer diameter of the movable portion ranges from 6 mm to 15 mm, and / or the inner diameter of the mounting opening ranges from 6.2 mm to 15.2 mm.

11. The water pump according to any one of claims 4 to 7, characterized in that: The pump body is also provided with a water inlet, a water outlet and a water flow channel. The water inlet, the water outlet and the installation port are connected through the water flow channel, and the movable part at least partially extends into the installation port.

12. The water pump according to claim 11, characterized in that The water flow channel includes a first flow channel and a second flow channel that are connected to each other. One end of the first flow channel is connected to the water inlet, and the other end is connected to the second flow channel. One end of the second flow channel is connected to the water outlet, and the other end is connected to the installation port. The cross-sectional area of ​​the second flow channel near the water outlet is smaller than the cross-sectional area of ​​the second flow channel near the installation port.

13. The water pump according to claim 11, characterized in that The pressure chamber comprises a first pump chamber and a second pump chamber which are connected to each other. The pump body forms the first pump chamber, and the diaphragm member forms the second pump chamber. The first pump chamber has a chamber bottom away from the movable portion. The movable portion has a first position away from the chamber bottom of the first pump chamber, and a second position close to the chamber bottom of the first pump chamber. The movable portion can be reciprocated between the first position and the second position. When the movable portion moves to the second position, the movable portion at least partially extends into the water flow channel.

14. The water pump according to any one of claims 4 to 7, characterized in that The extension portion includes a deformation portion and a pressing portion, one end of the deformation portion is connected to the movable portion, and the other end is connected to the pressing portion, and the pressing portion is limitedly disposed in the installation groove.

15. The water pump according to claim 14, characterized in that The mounting groove has a first annular wall and a second annular wall, the second annular wall is located on the outer side of the first annular wall, and the mounting groove is formed between the first annular wall and the second annular wall; the pressing portion is formed by extending outward from an end of the deformation portion away from the movable portion, and the water pump also includes a pressure ring, which is arranged in the mounting groove and presses the deformation portion and the pressing portion tightly.

16. The water pump according to claim 15, characterized in that In the length direction of the pump body, the height of the first ring wall is H, and the thickness of the pressing portion is T, satisfying H≥T.

17. The water pump according to claim 16, characterized in that The T satisfies 1mm≤T≤3mm, and the H satisfies 1.5mm≤H≤3.5mm.

18. The water pump according to claim 15, characterized in that The pressure chamber comprises a first pump chamber and a second pump chamber which are connected to each other. The pump body forms the first pump chamber, and the diaphragm member forms the second pump chamber. The first pump chamber has a chamber bottom away from the movable portion. The movable portion has a first position away from the chamber bottom of the first pump chamber, and a second position close to the chamber bottom of the first pump chamber. The movable portion can be reciprocated between the first position and the second position. When the movable portion is in the first position, the distance between the deformation portion and the end of the first annular wall is greater than the distance that the movable portion moves when switching between the first position and the second position.

19. The water pump according to any one of claims 1 to 7, characterized in that: The diaphragm member further comprises a connecting portion connected to the movable portion, and the connecting portion is used to be connected to a cam mechanism.

20. A water flosser, characterized in that: Comprising a water pump as claimed in any one of claims 1 to 19.

Images