Water pump and oral irrigator

Abstract

The water pump comprises a pump body and a plunger, a water pumping cavity, a water inlet flow channel and a water outlet flow channel are arranged in the pump body, the plunger is installed in the water pumping cavity in a sliding mode, the water pumping cavity comprises a first cavity body and a second cavity body, and a first water inlet and a first water outlet are communicated with the first cavity body. The second water inlet and the second water outlet are communicated with the second cavity, and the volume of the first cavity is not equal to that of the second cavity; the water pump has a first water outlet state and a second water outlet state which are mutually switched, in the first water outlet state, the first water inlet communicates with the water inlet runner, and the second water outlet communicates with the water outlet runner; in the second water outlet state, the second water inlet communicates with the water inlet runner, and the first water outlet communicates with the water outlet runner; the plunger slides between the first cavity and the second cavity in a reciprocating mode so that the water pump can be switched between the first water outlet state and the second water outlet state. According to the technical scheme, the cleaning efficiency of the oral irrigator can be improved, and the use experience of a user is improved.

Description

Technical Field

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

[0002] At present, the water pumps used in water flossers are mostly single-cylinder plunger pumps or diaphragm pumps. Such pumps often make the impact water flow of the water flosser present an intermittent pulse state. This intermittent pulse water flow will produce a pulse stimulation to the user, causing a stinging sensation when the water flow impacts the user's gums, affecting the user's experience. In addition, the pulsed intermittent water flow has no cleaning effect on the user during the period when the water flow is disconnected, resulting in poor cleaning efficiency. Utility Model Content

[0003] The main purpose of the utility model is to provide a water pump, aiming to improve the cleaning efficiency of the water flosser and enhance the user experience.

[0004] In order to achieve the above-mentioned purpose, the water pump proposed by the utility model comprises:

[0005] A pump body and a plunger, wherein the pump body is provided with a water pump cavity, a water inlet flow channel and a water outlet flow channel, the plunger is slidably mounted in the water pump cavity, the water pump cavity comprises a first cavity and a second cavity, a first water inlet and a first water outlet are connected to the first cavity, and a second water inlet and a second water outlet are connected to the second cavity, and the volume of the first cavity is not equal to the volume of the second cavity;

[0006] The water pump has a first water outlet state and a second water outlet state that can be switched to each other. In the first water outlet state, the first water inlet is connected to the water inlet channel, and the second water outlet is connected to the water outlet channel; in the second water outlet state, the second water inlet is connected to the water inlet channel, and the first water outlet is connected to the water outlet channel; the plunger slides back and forth between the first chamber and the second chamber to switch the water pump between the first water outlet state and the second water outlet state.

[0007] Optionally, the plunger includes a plunger portion slidably mounted in the water pump cavity, and a plunger rod connected to one end of the plunger portion;

[0008] The first chamber is located at a side of the plunger portion facing away from the plunger rod, and the second chamber is located at a side of the plunger portion facing the plunger rod. The volume of the second chamber is greater than that of the first chamber.

[0009] Optionally, a ratio of the volume of the first chamber to the volume of the second chamber is greater than 1 / 2.

[0010] Optionally, a ratio of the volume of the first chamber to the volume of the second chamber is greater than 4 / 5.

[0011] Optionally, along the axial direction of the water pump cavity, the depth of the second chamber is greater than the depth of the first chamber.

[0012] Optionally, a cross-sectional flow rate of at least part of the second chamber is greater than a cross-sectional flow rate of the first chamber.

[0013] Optionally, the second chamber has an expansion section at one end away from the first chamber, the cross-sectional flow rate of the expansion section is greater than the cross-sectional flow rate of the first chamber, and the length of the expansion section is less than the length of the plunger portion.

[0014] Optionally, a guide sleeve and a mounting joint are fixed in the water pump cavity, the guide sleeve is fixed to the water pump cavity, the mounting joint blocks the opening of the water pump cavity, the plunger part is slidably mounted on the inner ring of the guide sleeve, and the plunger rod is slidably penetrated through the through hole of the mounting joint;

[0015] One end of the guide sleeve abuts against the end surface of the pump water chamber, and the other end is spaced apart from the end surface of the mounting joint.

[0016] Optionally, the periphery of the end surface of the pump water cavity has a mounting step, and one end of the guide sleeve abuts against the mounting step, and the height of the mounting step is less than or equal to the distance between the guide sleeve and the mounting joint.

[0017] Optionally, a plurality of supporting protrusions are provided on the periphery of the end surface of the mounting joint, and the guide sleeve is mounted on the supporting protrusions so that the guide sleeve is spaced apart from the end surface of the mounting joint.

[0018] Optionally, a sealing structure is sleeved on the plunger to separate the water pump cavity into the first chamber and the second chamber.

[0019] Optionally, the water inlet flow channel includes a first water inlet flow channel and a second water inlet flow channel, and the water outlet flow channel includes a first water outlet flow channel and a second water outlet flow channel;

[0020] In the first water outlet state, the first water inlet is connected to the first water inlet channel, and the second water outlet is connected to the second water outlet channel; in the second water outlet state, the second water inlet is connected to the second water inlet channel, and the first water outlet is connected to the first water outlet channel.

[0021] Optionally, the first water inlet flow channel is provided with a first water inlet joint, and an end of the first water inlet joint close to the first water inlet has a first water outlet, and a first one-way valve controls the first water outlet;

[0022] The second water inlet flow channel is provided with a second water inlet joint, and the second water inlet joint has a second water outlet at one end close to the second water inlet, and a second one-way valve controls the second water outlet;

[0023] The first water outlet flow channel is equipped with a first water outlet joint, and a third one-way valve is provided between the first water outlet joint and the first water outlet, and the third one-way valve controls the first water outlet;

[0024] The second water outlet flow channel is equipped with a second water outlet joint, and a fourth one-way valve is provided between the second water outlet joint and the second water outlet, and the fourth one-way valve controls the second water outlet;

[0025] In the first water outlet state, the first one-way valve and the fourth one-way valve are opened, and the second one-way valve and the third one-way valve are closed. In the second water outlet state, the second one-way valve and the third one-way valve are opened, and the first one-way valve and the fourth one-way valve are closed.

[0026] Optionally, the plunger includes a plunger portion slidably mounted in the water pump cavity, and a plunger rod connected to one end of the plunger portion;

[0027] The pump body is provided with a leak-proof water flow channel connected to the water pump cavity, and the leak-proof water flow channel is used to collect liquid flowing out between the pump body and the plunger rod.

[0028] The utility model also provides a water flosser, comprising the water pump as described above.

[0029] The technical solution of the utility model is to set a water pump chamber, a water inlet channel and a water outlet channel on the pump body, and the plunger is slidably installed in the water pump chamber, the water pump chamber includes a first chamber and a second chamber, the first water inlet and the first water outlet are connected to the first chamber, the second water inlet and the second water outlet are connected to the second chamber, the water pump has a first water outlet state and a second water outlet state that can be switched to each other, in the first water outlet state, the first water inlet is connected to the water inlet channel, and the second water outlet is connected to the water outlet channel; at this time, the plunger slides from the first chamber to the second chamber, forcing the pressure of the plunger toward the first water inlet to drop, and the liquid in the water storage chamber of the water flosser flows into the water pump chamber from the first water inlet; at the same time, the pressure on the side of the plunger toward the second water outlet increases, thereby forcing the liquid in the water pump chamber to flow out of the water flosser from the water outlet channel to form a first pulse water flow. Then, the plunger slides from the second chamber to the first chamber, forcing the pressure of the plunger toward the second water inlet to drop, and the liquid in the water storage chamber of the oral irrigator flows into the pump water chamber from the second water inlet; at the same time, the pressure on the side of the plunger toward the first water outlet increases, forcing the liquid in the pump water chamber to flow out of the oral irrigator from the water outlet channel to form a second pulse water flow. At this time, the first pulse water flow and the second pulse water flow appear alternately, so that the overall water flow of the punch will not be interrupted, thereby reducing the pulse stimulation of the intermittent pulse water flow to the user, and reducing the possibility of the water flow impacting the user's gums and causing the impact of the stinging feeling, thereby improving the user experience.

[0030] Moreover, the volume of the first chamber and the volume of the second chamber are not equal, so that the pressure difference generated in the first chamber and the second chamber is different, and the water outlet pressure of the corresponding first water outlet is different from the water outlet pressure of the second water outlet, thereby overcoming the problem of excessive difference in impact speed and water volume between the first pulse water flow and the second pulse water flow caused by the inequality of the flow path from the first water outlet to the nozzle of the water flosser and the flow path from the second water outlet to the nozzle of the water flosser, thereby improving the user comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] Figure 1 It is a time domain flow curve diagram of a single-cylinder plunger pump in the prior art;

[0033] Figure 2 It is a time domain flow curve diagram of an embodiment of the water pump of the utility model;

[0034] Figure 3 for Figure 2Front view of the water pump;

[0035] Figure 4 for Figure 2 Side view of the water pump;

[0036] Figure 5 for Figure 2 A top view of the pump body;

[0037] Figure 6 for Figure 5 Sectional view of the pump body along AA;

[0038] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0039] Figure 8 for Figure 2 A top view of the middle pump body in the first water discharge state;

[0040] Fig. 9 for Figure 8 Sectional view of the middle pump body along BB;

[0041] Fig.10 for Figure 2 A top view of the middle pump body in the second water discharge state;

[0042] Fig.11 for Fig.10 Sectional view of the middle pump body along CC;

[0043] Fig.12 for Fig.11 Schematic diagram of the installation joint structure.

[0044] Description of Figure Numbers:

[0045]

[0046]

[0047] 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

[0048] 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.

[0049] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0050] 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 is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. 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.

[0051] In the prior art, the water pump used in the oral irrigator is mostly a single-cylinder plunger pump or a diaphragm pump, and this type of pump body often causes the impact water flow of the oral irrigator to present an intermittent pulse state. Figure 1 That is the time domain flow curve diagram of the single-cylinder plunger pump in the prior art, such as Figure 1 As shown, the water pump does not generate water flow in about half of the time, that is, the water flow is generated when the plunger in the water pump moves along the first direction, but no water flow is generated when it moves along the second direction (the first direction and the second direction are arranged oppositely along the axial direction of the plunger). This results in the overall working efficiency of the water pump being low, and the corresponding cleaning efficiency is also low. In addition, the intermittent pulse water flow will produce a pulse stimulation to the user, and the user is prone to feel the impact and stinging, and the user's experience is poor.

[0052] In view of this, the present invention provides a water pump 10 for use in a water flosser.

[0053] In the embodiment of the present utility model, Figures 1 to 12As shown, the water pump 10 includes a pump body 20 and a plunger 30. The pump body 20 is provided with a water pumping chamber 21, a water inlet channel 26 and a water outlet channel 27. The plunger 30 is slidably mounted in the water pumping chamber 21. The water pumping chamber 21 includes a first chamber 215 and a second chamber 216. The first water inlet 211 and the first water outlet 213 are connected to the first chamber 215, and the second water inlet 212 and the second water outlet 214 are connected to the second chamber 216. The volume of the first chamber 215 is different from the volume of the second chamber 216. etc.; the water pump 10 has a first water outlet state and a second water outlet state that can be switched to each other. In the first water outlet state, the first water inlet 211 is connected to the water inlet channel 26, and the second water outlet 214 is connected to the water outlet channel 27; in the second water outlet state, the second water inlet 212 is connected to the water inlet channel 26, and the first water outlet 213 is connected to the water outlet channel 27; the plunger 30 reciprocates between the first chamber 215 and the second chamber 216 to switch the water pump 10 between the first water outlet state and the second water outlet state.

[0054] Specifically, the water pump chamber 21 is arranged in the pump body 20, and the first water inlet 211, the second water inlet 212, the first water outlet 213 and the second water outlet 214 are all opened on the cavity wall of the water pump chamber 21, that is, the first water inlet 211, the second water inlet 212, the first water outlet 213 and the second water outlet 214 are all directly arranged on the cavity wall of the water pump chamber 21, rather than indirectly connecting to the water pump chamber 21 through a specific water flow channel, so that the plunger 30 moves in the water pump chamber 21 to control the pressure change in the water pump chamber 21, and directly transmit it to the first water inlet 211, the second water inlet 212, the first water outlet 213 and the second water outlet 214, thereby reducing pressure loss. The plunger 30 is at least partially disposed in the water pump chamber 21, and the driving mechanism drives the plunger 30 to slide back and forth in the water pump chamber 21. When the plunger 30 is completely disposed in the water pump chamber 21, the driving mechanism at least partially extends into the water pump chamber 21; when the plunger 31 is partially disposed in the water pump chamber 21, that is, the part of the plunger 30 extending out of the water pump chamber 21 is connected to the driving mechanism.

[0055] The plunger 30 and the pump water chamber 21 are often configured as cylindrical, so the axial direction of the plunger 30 is arranged parallel to the axial direction of the pump body 20. Figure 3 , Figure 4 , Figure 6 and Fig. 9 In the figure, L is the axial direction of the plunger 30, and correspondingly, the plunger 30 reciprocates along its axial direction in the pump water chamber 21.

[0056] The first water inlet 211 and the second water inlet 212 are both provided between the water inlet channel 26 and the water pumping chamber 21, and the water flow of the water inlet channel 26 can enter the first chamber 215 from the first water inlet 211 and the second chamber 216 from the second water inlet 212, respectively. The water flow of the water inlet channel 26 can be controlled to enter the water pumping chamber 21 by controlling the opening and closing of the first water inlet 211 and the second water inlet 212. The first water outlet 213 and the second water outlet 214 are provided between the water outlet channel 27 and the water pumping chamber 21, that is, the water flow of the water pumping chamber 21 can enter the water outlet channel 27 from the first water outlet 213 and the second water outlet 214, respectively. The water flow of the water pumping chamber 21 can be controlled to enter the water outlet channel 27 by controlling the opening and closing of the first water outlet 213 and the second water outlet 214.

[0057] Reference Figure 8 and Fig. 9 In the first water outlet state, the first water inlet 211 is connected to the water inlet channel 26, and the second water outlet 214 is connected to the water outlet channel 27; at this time, the plunger 30 slides from the first chamber 215 to the second chamber 216, forcing the plunger 30 to decrease the pressure toward the first water inlet 211, and the liquid in the water storage chamber of the water flosser flows from the first water inlet 211 into the water pump chamber 21; at the same time, the pressure on the side of the plunger 30 toward the second water outlet 214 increases, thereby forcing the liquid in the water pump chamber 21 to flow out of the water flosser from the water outlet channel 27 to form the first pulse water flow. Then, refer to Fig.10 and Fig.11 , the plunger 30 slides from the second chamber 216 to the first chamber 215, forcing the pressure of the plunger 30 toward the second water inlet 212 to drop, and the liquid in the water storage chamber of the water flosser flows into the water pump chamber 21 from the second water inlet 212; at the same time, the pressure of the plunger 30 toward the first water outlet 213 increases, thereby forcing the liquid in the water pump chamber 21 to flow out of the water flosser from the water outlet channel 27 to form a second pulse water flow. Figure 2 , Figure 2 This is the time domain flow curve of the water pump 10 in this embodiment. At this time, the first pulse water flow and the second pulse water flow appear alternately, so that the water flow of the whole water flusher will not be interrupted, thereby reducing the pulse stimulation of the intermittent pulse water flow to the user, and reducing the possibility of the water flow impacting the user's gums and causing the impact and stinging feeling, thereby improving the user experience. When the plunger 30 reciprocates between the first chamber 215 and the second chamber 216, water flow will be generated without interruption, thereby improving the working efficiency of the plunger 30, and then improving the cleaning efficiency of the water flusher.

[0058] Reference Figures 5 to 7The plunger 30 can separate the water pumping chamber 21 into a first chamber 215 and a second chamber 216 located at opposite ends of the plunger 30, that is, when the plunger 30 reaches pressure equilibrium in the water pumping chamber 21, the volume of the first chamber 215 and the volume of the second chamber 216 are different. Since the first water inlet 211 and the first water outlet 213 are connected to the first chamber 215, and the second water inlet 212 and the second water outlet 214 are connected to the second chamber 216, that is, the first water outlet 213 and the second water outlet 214 are respectively arranged in the first chamber 215 and the second chamber 216, the flow path from the first water outlet 213 to the nozzle of the water flosser and the flow path from the second water outlet 214 to the nozzle of the water flosser are often not equal, that is, the flow path of the liquid flowing out of the first water outlet 213 in the water outlet channel 27 is different from the flow path of the liquid flowing out of the first water outlet 213 in the water outlet channel 27, so the volume of the first chamber 215 and the volume of the second chamber 216 are different. The inner diameters of the first chamber 215 and the second chamber 216 are not equal, so that when the inner diameter of the first chamber 215 is equal to the inner diameter of the second chamber 216, the lengths of the movement paths of the plunger 30 in the first chamber 215 and the second chamber 216 are different; or, the lengths of the movement paths of the plunger 30 in the first chamber 215 and the second chamber 216 are the same, the inner diameters of the first chamber 215 and the second chamber 216 are not completely equal, and the pressure differences generated between the first chamber 215 and the second chamber 216 are different, so that the water outlet pressure of the first water outlet 213 is different from the water outlet pressure of the second water outlet 214, thereby reducing the impact speed and water volume difference between the first pulse water flow and the second pulse water flow, thereby improving the user's comfort.

[0059] In one embodiment, the plunger 30 includes a plunger portion 31 slidably mounted in the water pump chamber 21, and a plunger rod 32 connected to one end of the plunger portion 31; the first chamber 215 is located on the side of the plunger portion 31 away from the plunger rod 32, and the second chamber 216 is located on the side of the plunger portion 31 toward the plunger rod 32, and the volume of the second chamber 216 is greater than the volume of the first chamber 215.

[0060] Since the nozzle of the water flosser is often located on the side of the plunger portion 31 away from the plunger rod 32, that is, the nozzle of the water flosser is often located on the side of the first chamber 215 away from the second chamber 216, the distance from the first water outlet 213 to the nozzle is smaller than the distance from the second water outlet 214 to the nozzle, and the second water outlet 214 is located below the first water outlet 213. When the water flow of the second water outlet channel 25 is ejected from the nozzle of the water flosser, it needs to overcome greater gravity to do work. Therefore, the impact speed and water volume of the first pulse water flow and the second pulse water flow are quite different. To reduce the impact of the first pulse water flow and the second pulse water flow Speed ​​and water volume difference, the pressure required for the second water outlet 214 is greater than the pressure required for the first water outlet 213, so the volume of the second chamber 216 is greater than the volume of the first chamber 215, and the movement path of the plunger 30 in the second chamber 216 is greater than the movement path of the plunger 30 in the first chamber 215; and / or, the inner diameter of the second chamber 216 is greater than the inner diameter of the first chamber 215, and the corresponding pressure difference of the second chamber 216 is greater than the pressure difference of the first chamber 215, so as to enhance the water outlet pressure at the second water outlet 214 and reduce the impact speed and water volume difference between the first pulse water flow and the second pulse water flow.

[0061] Furthermore, the ratio of the volume of the first chamber 215 to the volume of the second chamber 216 is greater than 1 / 2. That is, the volume of the second chamber 216 is less than twice the volume of the first chamber 215. If the volume of the second chamber 216 is greater than twice the volume of the second chamber 216, the difference between the water pressure of the first water outlet 213 and the water pressure of the second water outlet 214 is too large, so that the impact speed and water volume of the first pulse water flow and the second pulse water flow are too different, which is not conducive to the user's comfort.

[0062] Furthermore, the ratio of the volume of the first chamber 215 to the volume of the second chamber 216 is greater than 4 / 5, thereby further reducing the impact speed and water volume difference between the first pulse water flow and the second pulse water flow, and improving the user's comfort.

[0063] In one embodiment, along the axial direction of the water pump chamber 21, the depth of the second chamber 216 is greater than the depth of the first chamber 215, that is, the movement path of the plunger 30 in the second chamber 216 is greater than the movement path of the plunger 30 in the first chamber 215, so that the pressure difference in the second chamber 216 is greater than the pressure difference generated in the first chamber 215, so that the water outlet pressure of the second water outlet 214 is greater than the water outlet pressure of the first water outlet 213, thereby reducing the impact speed and water volume difference between the first pulse water flow and the second pulse water flow, thereby improving the user's comfort.

[0064] In another embodiment, at least part of the cross-sectional flow rate of the second chamber 216 is greater than the cross-sectional flow rate of the first chamber 215. That is, the inner diameter of the second chamber 216 is greater than the inner diameter of the first chamber 215, and the corresponding pressure difference of the second chamber 216 is greater than the pressure difference of the first chamber 215, so as to enhance the outlet water pressure at the second water outlet 214 and reduce the impact speed and water volume difference between the first pulse water flow and the second pulse water flow.

[0065] Among them, at least part of the cross-sectional flow rate of the second chamber 216 is greater than the cross-sectional flow rate of the first chamber 215. That is, the cross-sectional flow rate of the second chamber 216 can be greater than the cross-sectional flow rate of the first chamber 215. For example, the inner diameter of the second chamber 216 is gradually expanded, but at this time the depth of the second chamber 216 is less than the length of the plunger part 31, that is, when the plunger part 31 is completely moved to the extreme position of the second chamber 216 away from one end of the first chamber 215, the plunger part 31 is not separated from the water pump chamber 21.

[0066] If the cross-sectional flow rate of part of the second chamber 216 is greater than the cross-sectional flow rate of the first chamber 215, in one embodiment, the first chamber 215 has an expansion section 217 at one end away from the second chamber 216, the cross-sectional flow rate of the expansion section 217 is greater than the cross-sectional flow rate of the first chamber 215, and the length of the expansion section 217 is less than the length of the plunger 31. At this time, only the cross-sectional flow rate of the expansion section 217 of the second chamber 216 is greater than the cross-sectional flow rate of the first chamber 215, and the cross-sectional flow rate of the remaining sections of the second chamber 216 is set equal to the cross-sectional flow rate of the first chamber 215, thereby expanding the volume of the entire second chamber 216. Similarly, the length of the expansion section 217 is less than the length of the plunger 31, that is, no matter where the plunger 31 moves to in the second chamber 216, the plunger 31 will not be separated from the water pump chamber 21.

[0067] Reference Figures 5 to 12 In one embodiment, a guide sleeve 60 and a mounting joint 70 are fixed in the water pump chamber 21, the guide sleeve 60 is fixed to the water pump chamber 21, the mounting joint 70 blocks the opening 218 of the water pump chamber 21, the plunger portion 31 is slidably mounted on the inner ring of the guide sleeve 60, and the plunger rod 32 is slidably penetrated through the through hole 71 of the mounting joint 70; one end of the guide sleeve 60 abuts against the end face of the water pump chamber 21, and the other end is spaced apart from the end face of the mounting joint 70.

[0068] Specifically, the guide sleeve 60 is fixed in the water pump cavity 21, and the plunger part 31 is slidably installed on the inner ring of the guide sleeve 60, thereby further guiding the movement of the plunger part 31, and facilitating the roughness treatment of the inner ring of the guide sleeve 60 to reduce the friction between the plunger part 31 and the water pump cavity 21, and reduce the abnormal noise generated during the movement of the plunger 30. In order to facilitate the assembly of the pump body 20, an opening 218 is set at one end of the water pump cavity 21, so as to facilitate the installation of the plunger 30, and then the opening 218 of the water pump cavity 21 is blocked by the installation joint 70, so as to form a closed chamber, and the through hole 71 is set in the installation joint 70. In order to ensure sealing, a sealing component is provided between the installation joint 70 and the opening 218, so as to reduce the possibility of leakage of the liquid in the water pump cavity 21. In other embodiments, the mounting joint 70 may also be integrally formed with the pump body 20 , that is, both ends of the pump water chamber 21 are closed. In this case, the pump body 20 may be composed of two half shells, thereby facilitating the installation of the plunger 30 , or the plunger 30 may be integrally formed in the pump water chamber 21 .

[0069] One end of the guide sleeve 60 abuts against the end face of the water pump chamber 21, that is, the inner diameter of the first chamber 215 is the inner diameter of the guide sleeve 60, and the inner diameter of the first chamber 215 is set constantly. The other end of the guide sleeve 60 is spaced apart from the end face of the mounting joint 70, that is, part of the inner diameter of the second chamber 216 is the inner diameter of the guide sleeve 60, and the other part of the inner diameter is the inner diameter of the water pump chamber 21 (approximately equal to the outer diameter of the guide sleeve 60), that is, the expanded section 217 of the second chamber 216, thereby facilitating the processing of the water pump chamber 21.

[0070] In order to facilitate the installation of the guide sleeve 60, the periphery of the end surface of the water pump chamber 21 has an installation step 219, and one end of the guide sleeve 60 abuts against the installation step 219, and the height of the installation step 219 is less than or equal to the distance between the guide sleeve 60 and the installation joint 70. Specifically, the installation step 219 can facilitate the fixing of the guide sleeve 60 in the water pump chamber 21, and at the installation step 219, the inner diameter of the water pump chamber 21 can be smaller than the inner diameter of the second chamber 216, thereby further reducing the volume of the first chamber 215. When the plunger 31 moves to the extreme position at one end of the first chamber 215 away from the second chamber 216, the plunger 31 can be blocked from colliding with the end surface of the water pump chamber 21 to a certain extent, so as to reduce noise and ensure the service life of the water pump 10.

[0071] To facilitate the fixing of the guide sleeve 60, in one embodiment, refer to Fig.11 and Fig.12, a plurality of supporting protrusions 72 are provided on the periphery of the end face of the mounting joint 70, and the guide sleeve 60 is installed on the supporting protrusions 72, so that the guide sleeve 60 is spaced apart from the end face of the mounting joint 70. Specifically, the end face of the mounting joint 70 is spaced apart from the guide sleeve 60. If the guide sleeve 60 is fixed in the pump water cavity 21 by bonding or interference fit, it is difficult to ensure that the guide sleeve 60 does not shift with the movement of the plunger 30, affecting the normal use of the water pump 10. Therefore, a plurality of supporting protrusions 72 are provided on the periphery of the end face of the mounting joint 70, and the guide sleeve 60 is installed on the supporting protrusions 72, so that the supporting protrusions 72 and the end face of the pump water cavity 21 jointly clamp the guide sleeve 60, thereby ensuring the fixation of the guide sleeve 60.

[0072] To ensure the sealing of the first chamber 215 and the second chamber 216, in one embodiment, refer to Figures 5 to 11 , a sealing structure 33 is sleeved on the plunger 30 to separate the water pump chamber 21 into a first chamber 215 and a second chamber 216. If the first chamber 215 and the second chamber 216 are separated only by the plunger portion 31, it is difficult to ensure that the airflow or water flow does not move relative to each other under the action of pressure, thereby affecting the water outflow and water inflow of the water pump chamber 21. Therefore, a sealing structure 33 is provided on the plunger portion 31 to ensure the relative sealing of the first chamber 215 and the second chamber 216, thereby reducing the possibility of airflow or water flow exchange between the first chamber 215 and the second chamber 216. The sealing structure 33 can be configured as one or more sealing rings 34 provided on the plunger 30 pump.

[0073] In one embodiment, the water inlet channel 26 includes a first water inlet channel 22 and a second water inlet channel 23 , and the water outlet channel 27 includes a first water outlet channel 24 and a second water outlet channel 25 ;

[0074] In the first water outlet state, the first water inlet 211 is connected to the first water inlet channel 22 , and the second water outlet 214 is connected to the second water outlet channel 25 ; in the second water outlet state, the second water inlet 212 is connected to the second water inlet channel 23 , and the first water outlet 213 is connected to the first water outlet channel 24 .

[0075] Specifically, the first water inlet channel 22 and the second water inlet channel 23 can be interconnected to jointly connect to the water tank of the water flosser, thereby reducing the space occupied by the water inlet channel 26, that is, the first water inlet channel 22 and the second water inlet channel 23 are connected to the water tank of the water flosser through a common water supply channel; of course, in other embodiments, the first water inlet channel 22 and the second water inlet channel 23 may not be interconnected, that is, the first water inlet channel 22 and the second water inlet channel 23 are both directly connected to the water tank of the water flosser.

[0076] The first water outlet channel 24 and the second water outlet channel 25 can be interconnected to jointly connect the nozzle of the water flosser, thereby reducing the space occupied by the water outlet channel 27, that is, the first water outlet channel 24 and the second water outlet channel 25 are connected to the nozzle of the water flosser through a common channel, or the second water outlet channel 25 is connected to the nozzle of the water flosser through the first water outlet channel 24; of course, in other embodiments, the first water outlet channel 24 and the second water outlet channel 25 may not be interconnected, that is, the first water outlet channel 24 and the second water outlet channel 25 are both directly connected to the nozzle of the water flosser.

[0077] In the first water outlet state, the first water inlet 211 is connected to the first water inlet channel 22, and the second water outlet 214 is connected to the second water outlet channel 25; at this time, the plunger 30 slides along the first direction in the water pump chamber 21, forcing the pressure of the plunger 30 toward the first water inlet 211 to drop, and the liquid in the water storage chamber of the oral irrigator flows into the water pump chamber 21 from the first water inlet channel 22; at the same time, the pressure on the side of the plunger 30 toward the second water outlet 214 increases, thereby forcing the liquid in the water pump chamber 21 to flow out of the oral irrigator from the second water outlet channel 25 to form a first pulse water flow. Then, the plunger 30 slides along the second direction in the water pump chamber 21, forcing the pressure of the plunger 30 toward the second water inlet 212 to drop, and the liquid in the water storage chamber of the oral irrigator flows into the water pump chamber 21 from the second water inlet channel 23; at the same time, the pressure on the side of the plunger 30 toward the first water outlet 213 increases, thereby forcing the liquid in the water pump chamber 21 to flow out of the oral irrigator from the first water outlet channel 24 to form a second pulse water flow.

[0078] Refer again Figures 5 to 11 In one embodiment, the first water inlet channel 22 is provided with a first water inlet connector 40, and the first water inlet connector 40 has a first water outlet 44 at one end close to the first water inlet port 211, and the first one-way valve 42 controls the first water outlet 44; that is, in this embodiment, by controlling the opening and closing of the first water outlet 44, whether the first water inlet channel 22 is blocked is controlled, thereby controlling the water flow of the first water inlet channel 22 to enter the water pump chamber 21. At this time, the first one-way valve 42 is arranged at the first water inlet connector 40, thereby facilitating the installation of the first one-way valve 42 and the first water inlet connector 40. In other embodiments, the first one-way valve 42 can also be arranged between the first water inlet connector 40 and the first water inlet port 211, and the first water inlet port 211 is controlled by the first one-way valve 42, thereby controlling the water flow of the first water inlet channel 22 to enter the water pump chamber 21.

[0079] The second water inlet channel 23 is installed with a second water inlet connector 41, and the second water inlet connector 41 has a second water outlet 45 at one end close to the second water inlet port 212, and the second one-way valve 43 controls the second water outlet 45; that is, in this embodiment, by controlling the opening and closing of the second water outlet 45, whether the second water inlet channel 23 is blocked is controlled, thereby controlling the water flow of the second water inlet channel 23 to enter the pump water chamber 21. At this time, the second one-way valve 43 is arranged at the second water inlet connector 41, thereby facilitating the installation of the second one-way valve 43 and the second water inlet connector 41. In other embodiments, the second one-way valve 43 can also be arranged between the second water inlet connector 41 and the second water inlet port 212, and the second water inlet port 212 is controlled by the second one-way valve 43, thereby controlling the water flow of the second water inlet channel 23 to enter the pump water chamber 21.

[0080] The first water outlet channel 24 is installed with a first water outlet connector 50, and a third one-way valve 51 is provided between the first water outlet connector 50 and the first water outlet 213, and the third one-way valve 51 controls the first water outlet 213; that is, in this embodiment, the opening and closing of the first water outlet 213 is controlled by the third one-way valve 51, so as to control the water flow in the pump water chamber 21 to enter the first water outlet channel 24.

[0081] The second water outlet channel 25 is installed with a second water outlet connector 52, and a fourth one-way valve 53 is provided between the second water outlet connector 52 and the second water outlet 214, and the fourth one-way valve 53 controls the second water outlet 214; that is, in this embodiment, the opening and closing of the second water outlet 214 is controlled by the fourth one-way valve 53, thereby controlling the water flow in the pump water chamber 21 to enter the second water outlet channel 25.

[0082] It can be understood that in the first water outlet state, the first check valve 42 and the fourth check valve 53 are opened, and the second check valve 43 and the third check valve 51 are closed, so that the first water inlet 211 is connected to the first water inlet channel 22, the second water inlet 212 is correspondingly blocked, the second water outlet 214 is connected to the second water outlet channel 25, and the first water outlet 213 is correspondingly blocked. In the second water outlet state, the second check valve 43 and the third check valve 51 are opened, and the first check valve 42 and the fourth check valve 53 are closed. So that the second water inlet 212 is connected to the second water inlet channel 23, the first water inlet 211 is correspondingly blocked, the first water outlet 213 is connected to the first water outlet channel 24, and the first water outlet 213 is correspondingly blocked.

[0083] In one embodiment, the plunger 30 includes a plunger portion 31 slidably mounted in the water pump chamber 21, and a plunger rod 32 connected to one end of the plunger portion 31; the pump body 20 is provided with a leakage-proof water flow channel 28 connected to the water pump chamber 21, and the leakage-proof water flow channel 28 is used to collect the liquid flowing out between the pump body 20 and the plunger rod 32.

[0084] Specifically, to facilitate the connection between the plunger 30 and the driving mechanism, the mounting joint 70 is provided with a through hole 71 for the plunger rod 32 to slide through, but the water flow in the pump water chamber 21 may leak from the gap between the plunger rod 32 and the through hole 71, that is, from the gap between the pump body 20 and the plunger rod 32. In order to reduce the possibility of water leakage, the pump body 20 is provided with a leak-proof water flow channel 28. The leak-proof water flow channel 28 can connect the gap between the through hole 71 and the plunger rod 32, and then connect the pump water chamber 21, so as to collect the liquid flowing out through the gap between the through hole 71 and the plunger rod 32, thereby reducing the possibility of water leakage.

[0085] The utility model also proposes a water flosser, which includes a water pump 10. The specific structure of the water pump 10 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 described one by one here.

[0086] The above are only preferred embodiments of the present invention, and do 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: include: A pump body and a plunger, wherein the pump body is provided with a water pump cavity, a water inlet flow channel and a water outlet flow channel, the plunger is slidably mounted in the water pump cavity, the water pump cavity comprises a first cavity and a second cavity, a first water inlet and a first water outlet are connected to the first cavity, and a second water inlet and a second water outlet are connected to the second cavity, and the volume of the first cavity is not equal to the volume of the second cavity; The water pump has a first water outlet state and a second water outlet state that can be switched to each other. In the first water outlet state, the first water inlet is connected to the water inlet channel, and the second water outlet is connected to the water outlet channel; in the second water outlet state, the second water inlet is connected to the water inlet channel, and the first water outlet is connected to the water outlet channel; the plunger slides back and forth between the first chamber and the second chamber to switch the water pump between the first water outlet state and the second water outlet state.

2. The water pump according to claim 1, characterized in that The plunger comprises a plunger portion slidably mounted in the pump water chamber, and a plunger rod connected to one end of the plunger portion; The first chamber is located at a side of the plunger portion facing away from the plunger rod, and the second chamber is located at a side of the plunger portion facing the plunger rod. The volume of the second chamber is greater than that of the first chamber.

3. The water pump according to claim 2, characterized in that: The ratio of the volume of the first chamber to the volume of the second chamber is greater than 1 / 2.

4. The water pump according to claim 2, characterized in that: A ratio of the volume of the first chamber to the volume of the second chamber is greater than 4 / 5.

5. The water pump according to claim 2, characterized in that: Along the axial direction of the water pump cavity, the depth of the second chamber is greater than the depth of the first chamber.

6. The water pump according to claim 2, characterized in that: The cross-sectional flow rate of at least part of the second chamber is greater than the cross-sectional flow rate of the first chamber.

7. The water pump according to claim 6, characterized in that The second chamber has an expansion section at one end away from the first chamber, the cross-sectional flow rate of the expansion section is greater than the cross-sectional flow rate of the first chamber, and the length of the expansion section is less than the length of the plunger portion.

8. The water pump according to claim 2, characterized in that: A guide sleeve and a mounting joint are fixed in the water pump cavity, the guide sleeve is fixed to the water pump cavity, the mounting joint blocks the opening of the water pump cavity, the plunger part is slidably mounted on the inner ring of the guide sleeve, and the plunger rod is slidably penetrated through the through hole of the mounting joint; One end of the guide sleeve abuts against the end surface of the pump water chamber, and the other end is spaced apart from the end surface of the mounting joint.

9. The water pump according to claim 8, characterized in that The periphery of the end surface of the pump water cavity has an installation step, and one end of the guide sleeve abuts against the installation step, and the height of the installation step is less than or equal to the distance between the guide sleeve and the installation joint.

10. The water pump according to claim 8, characterized in that A plurality of supporting protrusions are arranged on the periphery of the end surface of the mounting joint, and the guide sleeve is mounted on the supporting protrusions so that the guide sleeve is spaced apart from the end surface of the mounting joint.

11. The water pump according to any one of claims 1 to 10, characterized in that A sealing structure is sleeved on the plunger to separate the water pump cavity into the first chamber and the second chamber.

12. The water pump according to any one of claims 1 to 10, characterized in that The water inlet flow channel includes a first water inlet flow channel and a second water inlet flow channel, and the water outlet flow channel includes a first water outlet flow channel and a second water outlet flow channel; In the first water outlet state, the first water inlet is connected to the first water inlet channel, and the second water outlet is connected to the second water outlet channel; in the second water outlet state, the second water inlet is connected to the second water inlet channel, and the first water outlet is connected to the first water outlet channel.

13. The water pump according to claim 12, characterized in that The first water inlet flow channel is provided with a first water inlet joint, and one end of the first water inlet joint close to the first water inlet has a first water outlet, and a first one-way valve controls the first water outlet; The second water inlet flow channel is provided with a second water inlet joint, and the second water inlet joint has a second water outlet at one end close to the second water inlet, and a second one-way valve controls the second water outlet; The first water outlet flow channel is equipped with a first water outlet joint, and a third one-way valve is provided between the first water outlet joint and the first water outlet, and the third one-way valve controls the first water outlet; The second water outlet flow channel is equipped with a second water outlet joint, and a fourth one-way valve is provided between the second water outlet joint and the second water outlet, and the fourth one-way valve controls the second water outlet; In the first water outlet state, the first one-way valve and the fourth one-way valve are opened, and the second one-way valve and the third one-way valve are closed. In the second water outlet state, the second one-way valve and the third one-way valve are opened, and the first one-way valve and the fourth one-way valve are closed.

14. The water pump according to any one of claims 1 to 10, characterized in that The plunger comprises a plunger portion slidably mounted in the pump water chamber, and a plunger rod connected to one end of the plunger portion; The pump body is provided with a leak-proof water flow channel connected to the water pump cavity, and the leak-proof water flow channel is used to collect liquid flowing out between the pump body and the plunger rod.

15. A dental flosser, characterized in that: Comprising a water pump as claimed in any one of claims 1 to 14.

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