Water pump and oral irrigator

Abstract

The water pump comprises a pump body and a plunger, a water pumping cavity, a first water inlet flow channel, a second water inlet flow channel, a first water outlet flow channel and a second water outlet flow channel are arranged in the pump body, and the plunger is installed in the water pumping cavity in a sliding mode. A first water inlet, a second water inlet, a first water outlet and a second water outlet are formed in the cavity wall of the water pumping 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 first water inlet runner, and the second water outlet communicates with the second water outlet runner; in the second water outlet state, the second water inlet communicates with the second water inlet runner, and the first water outlet communicates with the first water outlet runner; the plunger slides in the water pumping 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 is 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] As people pay more attention to dental health, the demand for irrigators is increasing. However, the water pumps currently used in irrigators are mostly single-cylinder plunger pumps or diaphragm pumps. This type of pump body often causes the impact water flow of the irrigator to 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 first water inlet flow channel, a second water inlet flow channel, a first water outlet flow channel and a second water outlet flow channel, the plunger is slidably mounted in the water pump cavity, and a first water inlet, a second water inlet, a first water outlet and a second water outlet are opened on the cavity wall of the water pump 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 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; the plunger slides back and forth in the pump water cavity to switch the water pump between the first water outlet state and the second water outlet state.

[0007] Optionally, the axial direction of at least one of the first water outlet and the second water outlet is arranged parallel to the axial direction of the plunger; the axial direction of at least one of the first water inlet and the second water inlet is arranged at an angle to the axial direction of the plunger.

[0008] Optionally, the axial direction of at least one of the first water outlet and the second water outlet is arranged parallel to the axial direction of the plunger; the axial direction of at least one of the first water inlet and the second water inlet is arranged at an angle to the axial direction of the plunger.

[0009] Optionally, the axial direction of the first water outlet is arranged parallel to the axial direction of the plunger, and the axial direction of the second water outlet, the axial direction of the first water inlet and the axial direction of the second water inlet are all arranged at an angle to the axial direction of the plunger.

[0010] Optionally, the axial direction of the first water outlet is coaxial with the axial direction of the plunger.

[0011] Optionally, the first water inlet channel and the second water inlet channel are spaced apart along the axial direction of the plunger, and the water pump further comprises a water supply channel, which extends along the axial direction of the plunger and connects the first water inlet channel and the second water inlet channel in sequence.

[0012] Optionally, the pump body also includes a water supply part, the water supply channel is opened in the water supply part, and one side of the water supply part is provided with a first water inlet joint and a second water inlet joint connected to the water supply channel, the first water inlet joint is plugged into the first water inlet channel, and the second water inlet joint is plugged into the second water inlet channel.

[0013] Optionally, the water supply portion, the first water inlet connector and the second water inlet connector are integrally formed.

[0014] Optionally, the first water inlet flow channel and the second water inlet flow channel are located on the same side of the pump body; the first water outlet flow channel and the second water outlet flow channel are located on the same side of the pump body; and the second water inlet flow channel and the second water outlet flow channel are located on different sides of the pump body.

[0015] Optionally, the first water outlet channel at least partially extends along the axial direction of the plunger; and / or,

[0016] The second water outlet channel at least partially extends along the axial direction of the plunger.

[0017] Optionally, the second water outlet channel includes a first section extending radially along the plunger and a second section extending axially along the plunger, one end of the second section is connected to an end of the first section close to the second water outlet, and the other end is connected to a side of the first water outlet channel away from the first water outlet.

[0018] Optionally, the first section is provided with an opening at one end away from the second water outlet, the second water outlet joint blocks the opening, and a relief surface is provided on a side of the second water outlet joint facing the second water inlet, and a relief space is formed between the relief surface and an end surface of the first section;

[0019] In the first water outlet state, the second water outlet is connected to the second section through the avoidance space.

[0020] Optionally, the avoidance surface is arranged to be inclined, and the avoidance space is arranged to gradually expand in a direction approaching the second section.

[0021] Optionally, a cross-sectional area of ​​the second water outlet is larger than a cross-sectional area of ​​the second section.

[0022] Optionally, the outlet water pressure of the first outlet water channel is not equal to the outlet water pressure of the second outlet water channel.

[0023] Optionally, the first water outlet and the second water outlet are arranged at different heights; and / or,

[0024] The plunger portion of the plunger divides the pump water chamber into a first chamber and a second chamber, the first water inlet and the first water outlet are arranged in the first chamber, the second water inlet and the second water outlet are arranged in the second chamber, and the volumes of the first chamber and the second chamber are not equal.

[0025] Optionally, the first water inlet is arranged at one end of the water pump chamber close to the first water outlet, the second water outlet and the second water inlet are both arranged at one end of the water pump chamber away from the second water outlet, and the second water outlet and the second water inlet are arranged at intervals along the circumference of the plunger.

[0026] Optionally, the plunger includes a plunger portion slidably mounted on the water pump chamber, and a plunger rod connected to one end of the plunger portion, and the plunger portion is provided with a sealing structure to separate the water pump chamber into a first chamber and a second chamber, the first water inlet and the first water outlet are arranged in the first chamber, and the second water inlet and the second water outlet are arranged in the second chamber.

[0027] Optionally, the sealing structure includes two sealing rings, and the two sealing rings are arranged at intervals along the axial direction of the plunger part.

[0028] Optionally, one side of the sealing ring is opened, and the opening of the sealing ring close to the first chamber faces the first chamber, and the opening of the sealing ring close to the second chamber faces the second chamber.

[0029] Optionally, the plunger has a first limit position located at an end of the first chamber away from the second chamber, and a second limit position located at an end of the second chamber away from the first chamber;

[0030] In the first extreme position, the plunger is spaced apart from the end surface of the first chamber; and / or,

[0031] At the second extreme position, the plunger is spaced apart from the end surface of the second chamber.

[0032] 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;

[0033] 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 water pump cavity and the plunger rod.

[0034] Optionally, one end of the anti-leakage water channel away from the water pump cavity is connected to the first water inlet channel and / or the second water inlet channel.

[0035] 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;

[0036] 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;

[0037] 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;

[0038] 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;

[0039] 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.

[0040] Optionally, the first one-way valve is installed at one end of the first water inlet connector facing the first water inlet; and / or,

[0041] The second one-way valve is installed at one end of the second water inlet connector facing the second water inlet.

[0042] The utility model also provides a water flosser, comprising the water pump as described above.

[0043] The technical solution of the utility model is to set a water pump cavity, a first water inlet flow channel, a second water inlet flow channel, a first water outlet flow channel and a second water outlet flow channel in the pump body, and a plunger is slidably installed in the water pump cavity, and a first water inlet, a second water inlet, a first water outlet and a second water outlet are opened on the cavity wall of the water pump cavity. The plunger reciprocates in the water pump cavity to switch the water pump between the first water outlet state and the second water outlet state.

[0044] 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; the pressure of the plunger toward the first water inlet is reduced, and the liquid in the water storage chamber of the oral irrigator flows into the pump water chamber from the first water inlet channel; at the same time, the pressure on the side of the plunger toward the second water outlet is increased, thereby forcing the liquid in the pump water chamber to flow out of the oral irrigator from the second water outlet channel to form a first pulse water flow. 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; the pressure of the plunger toward the second water inlet is reduced, and the liquid in the water storage chamber of the oral irrigator flows into the pump water chamber from the second water inlet channel; at the same time, the pressure on the side of the plunger toward the first water outlet is increased, thereby forcing the liquid in the pump water chamber to flow out of the oral irrigator from the first water outlet channel to form a second pulse water flow. 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 of the stinging feeling, thereby improving the user experience. When the plunger moves in the first direction and the second direction, water flow will be generated without interruption, thereby improving the working efficiency of the plunger and further improving the cleaning efficiency of the water flosser. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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.

[0046] Figure 1 It is a time domain flow curve diagram of a single-cylinder plunger pump in the prior art;

[0047] Figure 2 It is a time domain flow curve diagram of an embodiment of the water pump of the utility model;

[0048] Figure 3 for Figure 2 Front view of the water pump;

[0049] Figure 4 for Figure 3 Side view of the water pump;

[0050] Figure 5 for Figure 3 A top view of the middle pump body in the first water discharge state;

[0051] Figure 6 for Figure 5 Sectional view of the pump body along AA;

[0052] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0053] Figure 8 for Figure 3 A top view of the middle pump body in the second water discharge state;

[0054] Fig. 9 for Figure 8 Sectional view of the middle pump body along BB;

[0055] Fig.10 for Fig. 9 A partial enlarged view of point B in the middle;

[0056] Fig.11 for Fig. 9 A partial enlarged view of point C in the middle;

[0057] Fig.12 for Figure 3 A schematic diagram of the structure of the second water outlet channel of the middle pump body;

[0058] Fig.13 for Figure 3 A schematic diagram of the structure of the first water inlet and the second water inlet of the middle pump body;

[0059] Fig.14 for Figure 3 A schematic diagram of the assembly structure of the first one-way valve, the second one-way valve and the water supply unit;

[0060] Fig.15 for Figure 3 Exploded view of the first one-way valve, the second one-way valve and the water supply section.

[0061] Description of Figure Numbers:

[0062]

[0063]

[0064] 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

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] In view of this, the present invention provides a water pump 10 for use in a water flosser.

[0070] In the embodiment of the present utility model, Figures 2 to 11As shown, the water pump 10 includes a pump body 20 and a plunger 30. The pump body 20 is provided with a water pumping cavity 21, a first water inlet channel 22, a second water inlet channel 23, a first water outlet channel 24 and a second water outlet channel 25. The plunger 30 is slidably installed in the water pumping cavity 21. The cavity wall of the water pumping cavity 21 is provided with a first water inlet 211, a second water inlet 212, a first water outlet 213 and a second water outlet 214. 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 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. The plunger 30 slides back and forth in the water pumping cavity 21 to switch the water pump 10 between the first water outlet state and the second water outlet state.

[0071] 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 12 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 12 at least partially extends into the water pump chamber 21; when the plunger portion 31 is partially disposed in the water pump chamber 21, that is, the portion of the plunger 30 extending out of the water pump chamber 21 is connected to the driving mechanism 12.

[0072] 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.

[0073] Reference Figure 6 and Fig. 9The first water inlet 211 is opened between the first water inlet channel 22 and the water pump chamber 21. The first water inlet 211 is connected to the first water inlet channel 22, that is, the water flow of the first water inlet channel 22 can enter the water pump chamber 21 from the first water inlet 211. The water flow of the first water inlet channel 22 can be controlled to enter the water pump chamber 21 by controlling the opening and closing of the first water inlet 211; or the water flow of the first water inlet channel 22 can be controlled to enter the water pump chamber 21 by controlling whether the first water inlet channel 22 is blocked. In one embodiment, the first water inlet channel 22 is equipped with a first water inlet joint 41, and the first water inlet joint 41 has a first water outlet 46 at one end close to the first water inlet 211, and the first check valve 44 controls the first water outlet 46; that is, in this embodiment, the first water inlet channel 22 is controlled to be blocked by controlling the opening and closing of the first water outlet 46, so as to control 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 44 is disposed at the first water inlet connector 41, so as to facilitate the installation of the first one-way valve 44 and the first water inlet connector 41. In other embodiments, the first one-way valve 44 can also be disposed between the first water inlet connector 41 and the first water inlet port 211, and the first one-way valve 44 controls the first water inlet port 211, thereby controlling the water flow of the first water inlet channel 22 to enter the pump water chamber 21.

[0074] Similarly, the second water inlet 212 is opened between the second water inlet channel 23 and the water pump chamber 21, and the second water inlet 212 is connected to the second water inlet channel 23, that is, the water flow of the second water inlet channel 23 can enter the water pump chamber 21 from the second water inlet 212, and the water flow of the second water inlet channel 23 can be controlled to enter the water pump chamber 21 by controlling the opening and closing of the second water inlet 212; or the water flow of the second water inlet channel 23 can be controlled to enter the water pump chamber 21 by controlling whether the second water inlet channel 23 is blocked. In one embodiment, the second water inlet channel 23 is installed with a second water inlet joint 42, and the second water inlet joint 42 has a second water outlet 47 at both ends close to the second water inlet 212, and the second one-way valve 45 controls the second water outlet 47; that is, in this embodiment, by controlling the opening and closing of the second water outlet 47, the second water inlet channel 23 is controlled to be blocked, thereby controlling the water flow of the second water inlet channel 23 to enter the water pump chamber 21. At this time, the second one-way valve 45 is disposed at the second water inlet connector 42, thereby facilitating the installation of the second one-way valve 45 and the second water inlet connector 42. In other embodiments, the second one-way valve 45 may also be disposed between the second water inlet connector 42 and the second water inlet port 212, and the second one-way valve 45 controls the second water inlet port 212, thereby controlling the water flow of the second water inlet channel 23 to enter the pump water chamber 21.

[0075] The first water outlet 213 is opened between the first water outlet flow channel 24 and the pump water chamber 21. The first water outlet 213 is connected to the first water outlet flow channel 24, that is, the water flow of the pump water chamber 21 can enter the first water outlet flow channel 24 from the first water outlet 213. The water flow of the pump water chamber 21 can be controlled to enter the first water outlet flow channel 24 by controlling the opening and closing of the first water outlet 213; or the water flow of the pump water chamber 21 can be controlled to enter the first water outlet flow channel 24 by controlling whether the first water outlet flow channel 24 is blocked. In one embodiment, the first water outlet flow channel 24 is installed with a first water outlet joint 50, and a third one-way valve 51 is provided between the first water outlet joint 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 to control the water flow of the pump water chamber 21 to enter the first water outlet flow channel 24.

[0076] Similarly, the second water outlet 214 is opened between the second water outlet flow channel 25 and the pump water chamber 21, and the second water outlet 214 is connected to the second water outlet flow channel 25, that is, the water flow of the pump water chamber 21 can enter the second water outlet flow channel 25 from the second water outlet 214, and the water flow of the pump water chamber 21 can be controlled to enter the second water outlet flow channel 25 by controlling the opening and closing of the second water outlet 214; or the water flow of the pump water chamber 21 can be controlled to enter the second water outlet flow channel 25 by controlling whether the second water outlet flow channel 25 is blocked. In one embodiment, the second water outlet flow channel 25 is installed with a second water outlet joint 52, and a fourth one-way valve 53 is provided between the second water outlet joint 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 to control the water flow of the pump water chamber 21 to enter the second water outlet flow channel 25.

[0077] Reference Figure 6 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 in the pump water chamber 21 along the first direction, 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 channel 22 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 pump water chamber 21 to flow out of the water flosser from the second water outlet channel 25 to form the first pulse water flow. Then, refer to Fig. 9 , the plunger 30 slides in the pump water chamber 21 along the second direction, forcing the plunger 30 to decrease the pressure toward the second water inlet 212, and the liquid in the water storage chamber of the oral irrigator flows into the pump water 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 pump water chamber 21 to flow out of the oral irrigator from the first water outlet channel 24 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 moves in the first direction and the second direction, 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.

[0078] It can be understood that in the first water outlet state, the first check valve 44 and the fourth check valve 53 are opened, and the second check valve 45 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 45 and the third check valve 51 are opened, and the first check valve 44 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.

[0079] The plunger 30 can separate the water pump chamber 21 into a first chamber 215 and a second chamber 216 located at opposite ends of the plunger 30, one of the first water inlet 211 and the second water inlet 212 is located in the first chamber 215, and the other is located in the second chamber 216; one of the first water outlet 213 and the second water outlet 214 is located in the first chamber 215, and the other is located in the second chamber 216, and the first water inlet 211 and the first water outlet 213 are located in the same chamber, and the second water inlet 212 and the second water outlet 214 are located in the same chamber, thereby ensuring the normal operation of the water pump 10.

[0080] In this embodiment, the first water inlet 211 and the first water outlet 213 are arranged in the first chamber 215, that is, the first chamber 215 is used to connect the first water inlet 211 and the first water outlet 213, and the second water inlet 212 and the second water outlet 214 are arranged in the second chamber 216. That is, the second chamber 216 is used to connect the second water inlet 212 and the second water outlet 214, refer to Figure 6 , the plunger 30 moves toward the second chamber 216, the water pump 10 changes to the first water outlet state, the pressure of the first chamber 215 decreases, the liquid in the first water inlet 211 enters the first chamber 215, the pressure of the second chamber 216 increases, and the liquid in the second chamber 216 is discharged from the second water outlet 214; refer to Fig. 9The plunger 30 moves toward the first chamber 215 , the water pump 10 changes to the second water outlet state, the pressure in the second chamber 216 drops, the liquid in the second water inlet 212 enters the second chamber 216 , the pressure in the first chamber 215 increases, and the liquid in the first chamber 215 is discharged from the first water outlet 213 .

[0081] In one embodiment, the water outlet pressure of the first water outlet channel 24 is not equal to the water outlet pressure of the second water outlet channel 25, so that the impact speeds of the first pulse water flow and the second pulse water flow when flowing out of the water flosser are different. Because the first pulse water flow and the second pulse water flow appear alternately, the impact speeds of the two are different. While ensuring that the water flow of the water flosser is not interrupted, the water flow speed of the water flosser can be continuously changed, thereby improving the comfort of the user. In order to ensure the comfort of the user, the difference between the water outlet pressure of the first water outlet channel 24 and the water outlet pressure of the second water outlet channel 25 should not be too large.

[0082] In order to ensure that the water outlet pressure of the first water outlet flow channel 24 is not equal to the water outlet pressure of the second water outlet flow channel 25, in one embodiment, the first water outlet 213 and the second water outlet 214 are set at different heights. That is, the distance from the first water outlet 213 to the nozzle of the water flosser is not equal to the distance from the first water outlet 213 to the nozzle of the water flosser. Thus, the water outlet pressure of the first water outlet flow channel 24 is not equal to the water outlet pressure of the second water outlet flow channel 25. Because the nozzle of the oral irrigator is often arranged at the end of the plunger part 31 away from the plunger rod 32, that is, it is arranged close to the first chamber 215, that is, the nozzle is located at the upper part of the oral irrigator, and the axial direction of the first water outlet 213 is arranged parallel to the axial direction of the pump water chamber 21, so that the first water outlet 213 is arranged above the second water outlet 214, so 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, so that the water flow of the second water outlet channel 25 needs to overcome greater gravity to do work when it is sprayed out from the nozzle of the oral irrigator, so the impact speed and water volume of the first pulse water flow are greater than the impact speed and water volume of the second pulse water flow, that is, the water outlet pressure of the first water outlet channel 24 is greater than the water outlet pressure of the second water outlet channel 25.

[0083] In another embodiment, the volumes of the second chamber 216 and the first chamber 215 are not equal, that is, when the plunger 30 reaches pressure equilibrium in the pump water chamber 21, the volume of the first chamber 215 and the volume of the second chamber 216 are not the same, so that the water inlet pressure of the first water outlet channel 24 and the water inlet pressure of the second water outlet channel 25 are set differently, so that the water outlet pressure of the first water outlet channel 24 can be adjusted to be greater than the water outlet pressure of the second water outlet channel 25 by adjusting the volume relationship between the second chamber 216 and the first chamber 215. When the first water outlet 213 is arranged above the second water outlet 214, in order to reduce the impact speed and water volume difference between the first pulse water flow and the second pulse water flow, the volume relationship between the second chamber 216 and the first chamber 215 can be adjusted. Since the pressure required for the second water outlet 214 is greater than the pressure required for the first water outlet 213, the volume of the second chamber 216 is greater than the volume 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; and / or, the inner diameter of the second chamber 216 is greater than the inner diameter of the first chamber 215, corresponding to the 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.

[0084] Reference Figure 6 and Fig. 9 In one embodiment, the plunger 30 has a first limit position located at one end of the first chamber 215 away from the second chamber 216, and a second limit position located at one end of the second chamber 216 away from the first chamber 215;

[0085] In the first limit position, the plunger 30 is spaced apart from the end surface of the first chamber 215; and / or,

[0086] At the second limit position, the plunger 30 is spaced apart from the end surface of the second chamber 216 .

[0087] Specifically, the first limit position is the position of the plunger 30 in the pump water chamber 21 when the water flow in the first chamber 215 is discharged to the maximum extent ( Figure 6 The plunger 30 is in the first limit position, at which point there is a gap between the plunger 30 and the end surface of the first chamber 215, that is, the plunger 30 and the end surface of the first chamber 215 do not abut against each other, thereby reducing the collision between the plunger 31 and the end surface of the pump water chamber 21, thereby reducing noise and ensuring the service life of the water pump 10. The second limit position is the position of the plunger 30 in the pump water chamber 21 when the water flow in the second chamber 216 is discharged to the maximum extent ( Fig. 9The plunger 30 reciprocates between the first limit position and the second limit position. At this time, there is a gap between the plunger 30 and the end surface of the second chamber 216, that is, the plunger 30 and the end surface of the second chamber 216 do not abut against each other, thereby reducing the collision between the plunger portion 31 and the end surface of the pump water chamber 21, thereby reducing noise and ensuring the service life of the water pump 10.

[0088] Refer again Figure 6 , Figure 7 and Fig. 9 In one embodiment, the axial direction of at least one of the first water outlet 213 and the second water outlet 214 is arranged parallel to the axial direction of the plunger 30. Specifically, taking the axial direction of the first water outlet 213 being parallel to the axial direction of the plunger 30 as an example, that is, the first water outlet 213 is opened at the end surface of the pump water chamber 21, that is, the first water outlet 213 is arranged toward the movement direction of the plunger 30, so that the plunger 30 can directly impact the first water outlet 213, reduce energy loss, increase the speed and / or water volume of water entering the first water outlet channel 24, and thus increase the water flow impact force and / or water flow rate of the water flosser. Therefore, only the axial direction of the first water outlet 213 may be parallel to the axial direction of the plunger 30, thereby increasing the water flow velocity and flow rate of the first water outlet 213; or only the axial direction of the first water outlet 213 may be parallel to the axial direction of the plunger 30, thereby increasing the water flow velocity and flow rate of the first water outlet 213; or both the axial direction of the first water outlet 213 and the axial direction of the second water outlet 214 may be parallel to the axial direction of the plunger 30.

[0089] However, if the axial direction of the first water outlet 213 and the axial direction of the second water outlet 214 are both parallel to the axial direction of the plunger 30, since the first water outlet 213 and the second water outlet 214 are respectively arranged at opposite ends of the plunger 30, and the plunger 30 includes a plunger portion 31 for separating the pump water chamber 21, and a plunger rod 32 for connecting with the driving mechanism 12, then one of the first water outlet 213 and the second water outlet 214 is arranged at an end of the plunger portion 31 away from the plunger rod 32, and the other is arranged at an end of the plunger portion 31 facing the plunger rod 32. Take the example that the first water outlet 213 is arranged at an end of the plunger portion 31 away from the plunger rod 32, and the second water outlet 214 is arranged at an end of the plunger portion 31 facing the plunger rod 32. At this time, the second water outlet 214 not only needs to avoid the plunger rod 32, but also the water outlet direction of the second water outlet 214 is set opposite to the total water outlet direction of the water flosser, resulting in a large loss of water outlet rate in the first water outlet channel 24, and also making the difference between the water volume and water outlet rate of the first pulse water flow and the second pulse water flow large, which is not conducive to the user's comfort. Therefore, preferably, the axial direction of the first water outlet 213 is parallel to the axial direction of the plunger 30, and the axial direction of the second water outlet 214 is set at an angle to the axial direction of the plunger 30, thereby reducing the difference between the water volume and water outlet rate of the first pulse water flow and the second pulse water flow, and improving the uniformity of water outlet of the water flosser.

[0090] Furthermore, the axial direction of the first water outlet 213 is coaxial with the axial direction of the plunger 30. The piston thrust can be effectively utilized, thereby improving the working efficiency of the water pump 10. Such a configuration can also make the structure of the water pump 10 more compact, which is beneficial to the spatial layout of the whole water flosser, and can also make the water pump 10 more balanced during operation, which is beneficial to reducing the vibration and noise of the water pump 10 and extending the life of the water pump 10.

[0091] Refer again Figure 6 and Fig. 9 In one embodiment, the axial direction of at least one of the first water inlet 211 and the second water inlet 212 is set at an angle with the axial direction of the plunger 30. For example, the axial direction of the first water inlet 211 is set at an angle with the axial direction of the plunger 30, that is, the first water inlet 211 is set on the side of the pump water chamber 21, so as to avoid the plunger 30 directly impacting the first water inlet 211 during the movement, thereby reducing the impact force of the water flow on the first one-way valve 44 and reducing the possibility of water backflow. It can also provide avoidance for the first water outlet 213 and / or the second water outlet 214, thereby improving the overall layout of the water pump 10 and making the pump body 20 structure more compact. Among them, only the axial direction of the first water inlet 211 can be set at an angle with the axial direction of the plunger 30; only the axial direction of the second water inlet 212 can be set at an angle with the axial direction of the plunger 30; or the axial direction of the first water inlet 211 and the axial direction of the second water inlet 212 are both set at an angle with the axial direction of the plunger 30. Since the first water inlet 211 and the second water inlet 212 are disposed at opposite ends of the plunger 30 , preferably, the axial direction of the first water inlet 211 and the axial direction of the second water inlet 212 are both disposed at an angle to the axial direction of the plunger 30 .

[0092] In one embodiment, the first water inlet channel 22 and the second water inlet channel 23 are arranged at intervals along the axial direction of the plunger 30, and the water pump 10 further includes a water supply channel 26, which extends along the axial direction of the plunger 30 and sequentially connects the first water inlet channel 22 and the second water inlet channel 23. Specifically, the number of the first water inlet channel 22 can be one or more, and the multiple first water inlet channels 22 are connected to the first water inlet 211. The number of the second water inlet channel 23 can be one or more, and the multiple second water inlet channels 23 are connected to the second water inlet 212. And because the axial direction of the first water inlet 211 and the axial direction of the second water inlet 212 are both arranged at an angle to the axial direction of the plunger 30, the two are arranged at intervals along the axial direction of the plunger 30, corresponding to the first water inlet channel 22 and the second water inlet channel 23 being arranged at intervals along the axial direction of the plunger 30, thereby improving the rationality of the channel distribution in the pump body 20. One end of the water supply channel 26 is connected to the water storage chamber of the oral irrigator, and extends along the axial direction of the plunger 30 to sequentially connect the first water inlet channel 22 and the second water inlet channel 23. In addition, along the axial direction of the plunger 30, the first water inlet channel 22 and the second water inlet channel 23 are arranged opposite to each other, so that the water supply channel 26 is arranged parallel to the axial direction of the plunger 30. Compared with the staggered arrangement of the first water inlet channel 22 and the second water inlet channel 23, this solution can not only reduce the length of the water supply channel 26, but also reduce the radial space occupied by the pump body 20, which helps to reduce the overall volume of the oral irrigator, so as to facilitate the user to use and carry.

[0093] Reference Figure 4 , Figure 6 and Fig. 9 Furthermore, the pump body 20 also includes a water supply part 40, the water supply channel 26 is opened in the water supply part 40, and a first water inlet joint 41 and a second water inlet joint 42 connected to the water supply channel 26 are provided on one side of the water supply part 40, the first water inlet joint 41 is plugged into the first water inlet channel 22, and the second water inlet joint 42 is plugged into the second water inlet channel 23. Specifically, the pump body 20 includes a main body with a pump water cavity 21, and a water supply part 40 with a water supply channel 26, and the water supply part 40 can be detachably installed on the main body, so as to facilitate the processing of the pump body 20. A first water inlet joint 41 and a second water inlet joint 42 connected to the water supply flow channel 26 are provided on one side of the water supply part 40. The first water inlet joint 41 is plugged into the main body to form the first water inlet flow channel 22, and the second water inlet joint 42 is plugged into the main body to form the second water inlet flow channel 23, thereby completing the rapid installation of the water supply part 40 and the main body, thereby facilitating the assembly of the pump body 20. The side of the water supply flow channel 26 is directly connected to the first water inlet flow channel 22 and the second water inlet flow channel 23, without the need to be connected through other flow channels, which can also reduce the total length of the water inlet flow channel of the pump body 20, reduce the flow path of the water flow, and improve the working efficiency of the plunger 30.

[0094] Preferably, refer to 13 to Fig.15The water supply portion 40, the first water inlet connector 41 and the second water inlet connector 42 are integrally formed, which not only facilitates the assembly of the first water inlet connector 41 and the water supply portion 40, and the second water inlet connector 42 and the water supply portion 40, but also reduces the possibility of water leakage of the pump body 20. Of course, in other embodiments, the water supply portion 40 can be integrally formed only with the first water inlet connector 41, and separately formed with the second water inlet connector 42; or, the water supply portion 40 is integrally formed only with the second water inlet connector 42, and separately formed with the first water inlet connector 41; or, the water supply portion 40, the first water inlet connector 41 and the second water inlet connector 42 are all separately formed.

[0095] Furthermore, the first one-way valve 44 is installed at one end of the first water inlet connector 41 toward the first water inlet 211, so as to facilitate the installation of the first one-way valve 44. To further facilitate the installation of the first one-way valve 44, the first water inlet connector 41 may include a first mounting portion 411 and a second mounting portion 412 that can be detachably installed. The first mounting portion 411 is integrally formed with the water supply portion 40, and the first one-way valve 44 is installed on the second mounting portion 412, and the first mounting portion 411 and the second mounting portion 412 can be fastened and connected by fasteners.

[0096] The second one-way valve 45 is installed at one end of the second water inlet connector 42 toward the second water inlet 212, so as to facilitate the installation of the second one-way valve 45. To further facilitate the installation of the second one-way valve 45, the second water inlet connector 42 may include a detachable third mounting portion 421 and a fourth mounting portion 422, wherein the third mounting portion 421 is integrally formed with the water supply portion 40, and the second one-way valve 45 is installed on the fourth mounting portion 422, and the third mounting portion 421 and the fourth mounting portion 422 may be fastened and connected by fasteners.

[0097] Refer again Figure 6 , Fig. 9 and Fig.11In one embodiment, the first water inlet channel 22 and the second water inlet channel 23 are located on the same side of the pump body 20; the first water outlet channel 24 and the second water outlet channel 25 are located on the same side of the pump body 20; and the second water inlet channel 23 and the second water outlet channel 25 are located on different sides of the pump body 20. Specifically, the first water inlet channel 22 and the second water inlet channel 23 are located on the same side of the pump body 20, that is, the first water inlet channel 22 and the second water inlet channel 23 are arranged in the same radial extension direction of the pump body 20, such an arrangement helps the water supply channel 26 to be parallel to the axial direction of the plunger 30, so as to shorten the length of the water supply channel 26 and help reduce the overall volume of the water pump. The first water outlet channel 24 and the second water outlet channel 25 are located on the same side of the pump body 20, so as to help reduce the length of the first water outlet channel 24 and / or the second water outlet channel 25 and help reduce the overall volume of the water pump. The second water inlet channel 23 and the second water outlet channel 25 are located on the opposite sides of the pump body 20, that is, the first water inlet channel 22 and the second water outlet channel 25 are located on the opposite sides of the pump body 20. Preferably, the first water inlet channel 22, the second water inlet channel 23 and the first water outlet channel 24, the second water outlet channel 25 are arranged on opposite sides of the pump body 20, thereby helping to reduce the thickness of the pump body 20.

[0098] When the water flow direction of the first water outlet 213 is the same as the water flow direction of the oral irrigator, in one embodiment, the first water outlet channel 24 extends along the axial direction of the plunger 30. At this time, the first water outlet 213 is provided at one end of the plunger portion 31 away from the plunger rod 32, and the first water outlet channel 24 extends along the axial direction of the plunger 30 and directly connects to the water outlet 11 of the oral irrigator; if the first water outlet 213 is arranged at an angle with the axial direction of the plunger 30, the first water outlet channel 24 includes a first channel extending along the radial direction of the plunger 30, and a second channel extending along the axial direction of the plunger 30; if the water flow direction of the first water outlet 213 is opposite to the water flow direction of the oral irrigator, the first water outlet channel 24 includes a first channel extending along the radial direction of the plunger 30, a second channel extending along the radial direction of the plunger 30, and a third channel extending along the axial direction of the plunger 30, and the water flow directions of the first channel and the third channel are arranged in opposite directions.

[0099] When the water flow direction of the second water outlet 214 is the same as the water flow direction of the oral irrigator, in one embodiment, the second water outlet channel 25 extends along the axial direction of the plunger 30. At this time, the second water outlet 214 is provided at one end of the plunger portion 31 away from the plunger rod 32, and the second water outlet channel 25 extends along the axial direction of the plunger 30 and directly connects to the water outlet 11 of the oral irrigator; if the second water outlet 214 is provided at an angle to the axial direction of the plunger 30, the second water outlet channel 25 includes a first channel extending along the radial direction of the plunger 30 and a second channel extending along the axial direction of the plunger 30; if the water flow direction of the second water outlet 214 is opposite to the water flow direction of the oral irrigator, the second water outlet channel 25 includes a first channel extending along the radial direction of the plunger 30, a second channel extending along the radial direction of the plunger 30, and a third channel extending along the axial direction of the plunger 30, and the water flow directions of the first channel and the third channel are provided in opposite directions.

[0100] Reference Figures 9 to 11 , when the axial direction of the first water outlet 213 is parallel to the axial direction of the plunger 30, and the axial direction of the second water outlet 214 is at an angle to the axial direction of the plunger 30, in one embodiment, the second water outlet channel 25 includes a first section 251 extending along the radial direction of the plunger 30, and a second section 252 extending along the axial direction of the plunger 30, one end of the second section 252 is connected to one end of the first section 251 close to the second water outlet 214, and the other end is connected to the side of the first water outlet channel 24 away from the first water outlet 213. Specifically, one end of the second section 252 is connected to one end of the first section 251 close to the second water outlet 214, thereby reducing the flow path of the water flow in the first section 251, thereby reducing the loss of the flow rate of the water flow in the first section 251, so as to improve the working efficiency of the plunger 30, and can reduce the difference in the water output and water output rate between the first pulse water flow and the second pulse water flow, and improve the uniformity of the water output of the water flosser. And the other end of the second section 252 is connected to the side of the first water outlet channel 24 away from the first water outlet 213, that is, the second water outlet channel 25 is connected to the water outlet 11 of the water flosser through the first water outlet channel 24. The first water outlet channel 24 is thickened at one end close to the first water outlet 213, so that one side of the first water outlet channel 24 is connected to the first water outlet 213, and the other side is connected to the second water outlet channel 25. Compared with the first water outlet channel 24 and the second water outlet channel 25 being respectively connected to the water outlet 11 of the water flosser, the flow channel design of the pump body 20 in this solution is more compact, which helps to reduce the overall volume of the water pump 10, thereby realizing the miniaturization of the water flosser.

[0101] Furthermore, the first section 251 is provided with an opening 253 at one end away from the second water outlet 214, the second water outlet connector 52 blocks the opening 253, and a side of the second water outlet connector 52 facing the second water inlet 212 is provided with an avoidance surface 43, and an avoidance space 431 is formed between the avoidance surface 43 and the end surface of the first section 251;

[0102] In the first water outlet state, the second water outlet 214 is connected to the second section 252 through the avoidance space 431 .

[0103] Specifically, the second water outlet joint 52 is inserted through the opening 253 of the first section 251 so that the fourth one-way valve 53 blocks the second water outlet 214. In the first water outlet state, the pressure at the second water outlet 214 increases, forcing the second one-way valve 45 to open. After the water flows out of the second water outlet 214, it flows into the second section 252 through the gap between the second water outlet joint 52 and the end face of the first section 251. Therefore, the second water outlet joint 52 is provided with an avoidance surface 43 on the side facing the second water inlet 212, thereby providing avoidance for the water flow, thereby increasing the water flow space and ensuring the flow rate of the water flow.

[0104] Furthermore, the avoidance surface 43 is inclined, and the avoidance space 431 is gradually expanded in the direction close to the second section 252. Specifically, the avoidance surface 43 is inclined, which can not only increase the avoidance space 431, but also provide a guide for the flow of water to the second section 252, so as to facilitate the flow of water into the second section 252.

[0105] Reference Fig.11 In order to reduce the loss of water flow velocity, in one embodiment, the cross-sectional area of ​​the second water outlet 214 is larger than the cross-sectional area of ​​the second section 252. Therefore, when the water flows from the first section 251 into the second section 252, the flow velocity of the water flow can be further increased, the loss of the water flow velocity can be reduced, and the difference in flow rate between the first pulse water flow and the second pulse water flow can be reduced.

[0106] Among them, there can be multiple second water outlets 214, and the multiple second water outlets 214 are arranged at intervals along the circumference of the pump water chamber 21 and the circumference of the first section 251. The fourth one-way valve 53 can block multiple second water outlets 214 at the same time, thereby increasing the water output of the second water outlet 214 and ensuring that the multiple second water outlets 214 are opened or closed synchronously. When there are multiple second water outlets 214, the total cross-sectional area of ​​the multiple second water outlets 214 is greater than the cross-sectional area of ​​the second section 252. When there is only one second water outlet 214, the cross-sectional area of ​​a single second water outlet 214 is greater than the cross-sectional area of ​​the second section 252. Similarly, there can be multiple first water outlets 213, or only one.

[0107] Refer again Figures 3 to 11In order to further improve the compactness of the structure of the pump body 20, in one embodiment, the first water inlet 211 is arranged at one end of the pump water chamber 21 close to the first water outlet 213, the second water outlet 214 and the second water inlet 212 are both arranged at one end of the pump water chamber 21 away from the second water outlet 214, and the second water outlet 214 and the second water inlet 212 are arranged at intervals along the circumference of the plunger 30. Specifically, the first water inlet 211 is arranged close to the first water outlet 213, thereby improving the compactness of the arrangement of the first water inlet 211 and the first water outlet 213, and the second water outlet 214 and the second water inlet 212 are both arranged at one end of the pump water chamber 21 away from the second water outlet 214, thereby extending the movement path of the pump plug and reducing the possibility of the pump plug blocking the second water outlet 214 and / or the second water inlet 212 during movement. The second water outlet 214 and the second water inlet 212 are arranged at intervals along the circumference of the plunger 30 , that is, the second water outlet 214 and the second water inlet 212 are jointly arranged in the circumference of the pump water chamber 21 , thereby improving the compactness of the arrangement of the second water inlet 212 and the second water outlet 214 .

[0108] In this embodiment, the pump body 20 also includes a guide sleeve 60 and a mounting joint 70. The guide sleeve 60 is fixed to the pump water chamber 21. The mounting joint 70 blocks the opening 253 of the pump water chamber 21 away from the first water outlet 213. The end faces of the guide sleeve 60 and the mounting joint 70 are spaced apart. The second water inlet 212 and the second water outlet 214 are opened between the guide sleeve 60 and the mounting joint 70, thereby facilitating the assembly of the plunger 30 and the pump body 20.

[0109] Reference Figures 5 to 10 To further reduce the possibility of liquid leakage from the pump body 20, in one embodiment, the plunger 30 includes a plunger portion 31 slidably mounted in the pump water chamber 21, and a plunger rod 32 connected to one end of the plunger portion 31;

[0110] The pump body 20 is provided with a leak-proof water flow channel 27 connected to the water pumping chamber 21 . The leak-proof water flow channel 27 is used to collect liquid flowing out between the water pumping chamber 21 and the plunger rod 32 .

[0111] Specifically, in order to facilitate the connection between the plunger 30 and the driving mechanism 12, 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. In order to reduce the possibility of water leakage, the pump body 20 is provided with a leak-proof water flow channel 27. The leak-proof water flow channel 27 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.

[0112] Furthermore, the end of the anti-leakage water channel 27 away from the pump water chamber 21 is connected to the first water inlet channel 22 and / or the second water inlet channel 23. That is, the anti-leakage water channel 27 re-introduces the collected liquid into the first water inlet channel 22 and / or the second water inlet channel 23, so as to reuse the collected liquid and reduce water waste. Therefore, the anti-leakage water channel 27 can be directly connected to the first water inlet channel 22, the second water inlet channel 23 or the water supply channel 26.

[0113] Of course, in other embodiments, the anti-leakage water channel 27 can be directly connected to the water supply chamber of the oral irrigator, or connected to the first water outlet channel 24 or the second water outlet channel 25.

[0114] In order to improve the sealing performance of the first chamber 215 and the second chamber 216, in one embodiment, referring again to Figures 5 to 10 The plunger 30 includes a plunger portion 31 slidably mounted on the water pumping chamber 21, and a plunger rod 32 connected to one end of the plunger portion 31. A sealing structure 33 is provided on the plunger portion 31 to separate the water pumping chamber 21 into a first chamber 215 and a second chamber 216. The first water inlet 211 and the first water outlet 213 are provided in the first chamber 215, and the second water inlet 212 and the second water outlet 214 are provided in the second chamber 216. Specifically, 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 pumping 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.

[0115] Furthermore, the sealing structure 33 includes two sealing rings 34, and the two sealing rings 34 are arranged at intervals along the axial direction of the plunger portion 31. Specifically, two sealing rings 34 are provided to increase the sealing effect of the sealing structure 33, and further reduce the possibility of air flow or water flow exchange between the first chamber 215 and the second chamber 216. In other embodiments, the sealing structure 33 may also include only one sealing ring 34, or the sealing structure 33 may include at least two sealing rings 34, such as the number of sealing rings 34 may be 3, 4, etc.

[0116] In order to further improve the sealing degree of the first chamber 215 and the second chamber 216, in one embodiment, one side of the sealing ring 34 is opened, and the opening of the sealing ring 34 close to the first chamber 215 faces the first chamber 215, and the opening of the sealing ring 34 close to the second chamber 216 faces the second chamber 216. Specifically, the sealing ring 34 is configured as a V-shaped sealing ring 34 or a Y-shaped sealing ring 34, one end of which is open, and the opening of the sealing ring 34 close to the first chamber 215 is toward the first chamber 215 (a first sealing ring 341 is provided), so that when the plunger 30 moves toward the first chamber 215, the opening of the first sealing ring 341 opens to further improve the sealing performance of the sealing ring 34 to the first chamber 215; and the opening of the sealing ring 34 close to the second chamber 216 is toward the second chamber 216 (a second sealing ring 342 is provided), so that when the plunger 30 moves toward the second chamber 216, the opening of the second sealing ring 342 opens to further improve the sealing performance of the sealing ring 34 to the second chamber 216, thereby improving the sealing effect of the sealing structure 33.

[0117] 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.

[0118] 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 first water inlet flow channel, a second water inlet flow channel, a first water outlet flow channel and a second water outlet flow channel, the plunger is slidably mounted in the water pump cavity, and a first water inlet, a second water inlet, a first water outlet and a second water outlet are opened on the cavity wall of the water pump 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 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; the plunger slides back and forth in the pump water cavity 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 axial direction of at least one of the first water outlet and the second water outlet is arranged parallel to the axial direction of the plunger; the axial direction of at least one of the first water inlet and the second water inlet is arranged at an angle to the axial direction of the plunger.

3. The water pump according to claim 2, characterized in that: The axial direction of the first water outlet is arranged parallel to the axial direction of the plunger, and the axial directions of the second water outlet, the first water inlet and the second water inlet are all arranged at an angle to the axial direction of the plunger.

4. The water pump according to claim 3, characterized in that: The axial direction of the first water outlet is coaxial with the axial direction of the plunger.

5. The water pump according to claim 1, characterized in that: The first water inlet channel and the second water inlet channel are spaced apart along the axial direction of the plunger, and the water pump further comprises a water supply channel, which extends along the axial direction of the plunger and connects the first water inlet channel and the second water inlet channel in sequence.

6. The water pump according to claim 5, characterized in that The pump body also includes a water supply part, the water supply channel is opened in the water supply part, and one side of the water supply part is provided with a first water inlet joint and a second water inlet joint connected to the water supply channel, the first water inlet joint is plugged into the first water inlet channel, and the second water inlet joint is plugged into the second water inlet channel.

7. The water pump according to claim 6, characterized in that The water supply portion, the first water inlet joint and the second water inlet joint are integrally formed.

8. The water pump according to claim 1, characterized in that The first water inlet flow channel and the second water inlet flow channel are located on the same side of the pump body; the first water outlet flow channel and the second water outlet flow channel are located on the same side of the pump body; and the second water inlet flow channel and the second water outlet flow channel are located on different sides of the pump body.

9. The water pump according to claim 1, characterized in that: The first water outlet channel at least partially extends along the axial direction of the plunger; and / or, The second water outlet channel at least partially extends along the axial direction of the plunger.

10. The water pump according to claim 9, characterized in that The second water outlet channel includes a first section extending along the radial direction of the plunger and a second section extending along the axial direction of the plunger. One end of the second section is connected to one end of the first section close to the second water outlet, and the other end is connected to a side of the first water outlet channel away from the first water outlet.

11. The water pump according to claim 10, characterized in that The first section is provided with an opening at one end away from the second water outlet, the second water outlet joint blocks the opening, and a relief surface is provided on a side of the second water outlet joint facing the second water inlet, and a relief space is formed between the relief surface and the end surface of the first section; In the first water outlet state, the second water outlet is connected to the second section through the avoidance space.

12. The water pump according to claim 11, characterized in that The avoidance surface is inclined, and the avoidance space is gradually expanded along a direction approaching the second section.

13. The water pump according to claim 10, characterized in that The cross-sectional area of ​​the second water outlet is larger than the cross-sectional area of ​​the second section.

14. The water pump according to claim 1, characterized in that The outlet water pressure of the first outlet water flow channel is not equal to the outlet water pressure of the second outlet water flow channel.

15. The water pump according to claim 14, characterized in that The first water outlet and the second water outlet are arranged at different heights; and / or, The plunger portion of the plunger divides the pump water chamber into a first chamber and a second chamber, the first water inlet and the first water outlet are arranged in the first chamber, the second water inlet and the second water outlet are arranged in the second chamber, and the volumes of the first chamber and the second chamber are not equal.

16. The water pump according to claim 1, characterized in that The first water inlet is arranged at one end of the water pump cavity close to the first water outlet, the second water outlet and the second water inlet are both arranged at one end of the water pump cavity away from the second water outlet, and the second water outlet and the second water inlet are arranged at intervals along the circumference of the plunger.

17. The water pump according to claim 1, characterized in that The plunger includes a plunger portion slidably mounted on the water pump chamber, and a plunger rod connected to one end of the plunger portion. The plunger portion is provided with a sealing structure to separate the water pump chamber into a first chamber and a second chamber. The first water inlet and the first water outlet are arranged in the first chamber, and the second water inlet and the second water outlet are arranged in the second chamber.

18. The water pump according to claim 17, characterized in that The sealing structure comprises two sealing rings, and the two sealing rings are arranged at intervals along the axial direction of the plunger part.

19. The water pump according to claim 18, characterized in that One side of the sealing ring is opened, and the opening of the sealing ring close to the first chamber faces the first chamber, and the opening of the sealing ring close to the second chamber faces the second chamber.

20. The water pump according to claim 17, characterized in that The plunger has a first limit position located at an end of the first chamber away from the second chamber, and a second limit position located at an end of the second chamber away from the first chamber; In the first extreme position, the plunger is spaced apart from the end surface of the first chamber; and / or, At the second extreme position, the plunger is spaced apart from the end surface of the second chamber.

21. 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 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 water pump cavity and the plunger rod.

22. The water pump according to claim 21, characterized in that One end of the anti-leakage water flow channel away from the water pump cavity is connected to the first water inlet flow channel and / or the second water inlet flow channel.

23. The water pump according to any one of claims 1 to 22, 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.

24. The water pump according to claim 23, characterized in that The first one-way valve is installed at one end of the first water inlet connector facing the first water inlet; and / or, The second one-way valve is installed at one end of the second water inlet connector facing the second water inlet.

25. A dental flosser, characterized in that: Comprising a water pump as claimed in any one of claims 1 to 24.

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