Water pump and oral irrigator

Abstract

A water pumping cavity, a water inlet runner and a water outlet runner are arranged in a pump body, a first water inlet, a second water inlet and a water outlet are formed in the cavity wall of the water pumping cavity, the first water inlet runner is communicated with the first water inlet, and the second water inlet runner is communicated with the second water inlet runner; the first water inlet connector is arranged on the first water inlet flow channel and provided with a first water passing opening, and the first one-way valve controls the first water passing opening. The second water inlet connector is arranged on the second water inlet flow channel and provided with a second water passing opening, the second one-way valve controls the second water passing opening, and the plunger slides in the water pumping cavity in a reciprocating mode so that the first one-way valve and the second one-way valve can be opened alternately. The first water passing opening and the first water inlet are staggered in the axial direction of the plunger; and / or the second water passing opening and the second water inlet are arranged in a staggered manner. According to the technical scheme, it is guaranteed that water flow in the water inlet flow channel smoothly flows to the water pumping cavity.

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] A water flosser is a device that uses the impact force of a water column sprayed under a certain pressure to clean teeth. Generally, the piston in the water pump changes its internal pressure to achieve water absorption and water spraying. The water in the water storage chamber enters the water pump chamber in one direction, and then flows out of the water pump chamber in one direction to achieve water pumping.

[0003] In order to realize the one-way water inflow of the pump water cavity, the pump body is provided with a water inlet connected to the pump water cavity and a water inlet channel connected to the water inlet, the water inlet channel is connected to the water inlet through the water outlet, and a one-way valve is provided between the water inlet and the water outlet. However, in the prior art, the relative positions of the water inlet and the water outlet are often not reasonable, which may affect the effective opening of the one-way valve, and further affect the water flow of the water inlet channel to the pump water cavity. Utility Model Content

[0004] The main purpose of the utility model is to provide a water pump, which is intended to help ensure that the water flow in the water inlet channel flows smoothly to the pump water cavity.

[0005] In order to achieve the above-mentioned purpose, the water pump proposed by the utility model comprises:

[0006] 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, a first water inlet, a second water inlet and a water outlet are provided on the cavity wall of the water pump cavity, the water inlet flow channel comprises a first water inlet flow channel for communicating with the first water inlet, and a second water inlet flow channel for communicating with the second water inlet flow channel;

[0007] A first water inlet connector, provided in the first water inlet channel, the first water inlet connector having a first water outlet for communicating with the first water inlet, and provided with a first one-way valve for controlling the first water outlet; and

[0008] a second water inlet joint, provided in the second water inlet flow channel, the second water inlet joint having a second water outlet for communicating with the second water inlet, and provided with a second one-way valve for controlling the second water outlet, the plunger reciprocatingly sliding in the water pump cavity to open the first one-way valve and the second one-way valve alternately;

[0009] Along the axial direction of the plunger, the first water outlet and the first water inlet are staggered; and / or the second water outlet and the second water inlet are staggered.

[0010] Optionally, along the axial direction of the plunger, a distance from the first water outlet to the bottom of the first water inlet channel is greater than a distance from the first water inlet to the bottom of the first water inlet channel.

[0011] Optionally, along the axial direction of the plunger, the first water passage partially overlaps with the first water inlet, and the size of the overlapping portion of the first water passage and the first water inlet is less than or equal to the radius of the first water inlet; or,

[0012] Along the axial direction of the plunger, the first water outlet and the first water inlet are spaced apart.

[0013] Optionally, a distance from the second water outlet to the bottom of the second water inlet channel is greater than a distance from the second water inlet to the bottom of the second water inlet channel.

[0014] Optionally, along the axial direction of the plunger, the second water outlet at least partially overlaps with the second water inlet, and the size of the overlapping portion of the second water outlet and the second water inlet is less than or equal to the radius of the second water inlet; or,

[0015] Along the axial direction of the plunger, the second water outlet and the second water inlet are spaced apart.

[0016] Optionally, along the axial direction of the plunger, the first water inlet is at least partially overlapped with the first one-way valve; and / or,

[0017] Along the axial direction of the plunger, the second water inlet is at least partially overlapped with the second one-way valve.

[0018] Optionally, the bottom of the first water inlet is higher than the bottom of the first water inlet channel, and the distance from the bottom of the first water inlet to the bottom of the first water inlet channel is less than or equal to 0.5 mm; and / or,

[0019] The bottom of the second water inlet is higher than the bottom of the second water inlet channel, and the distance from the bottom of the second water inlet to the bottom of the second water inlet channel is less than or equal to 0.5 mm.

[0020] Optionally, the bottom of the first water inlet is flush with the bottom of the first water inlet channel; and / or,

[0021] The bottom of the first water inlet is flush with the bottom of the first water inlet channel.

[0022] Optionally, the first water inlet joint has an upper half area close to the first water inlet and a lower half area away from the first water inlet, and the first water outlet is opened in the lower half area; and / or,

[0023] The second water inlet joint has an upper half area close to the second water inlet and a lower half area away from the second water inlet, and the second water outlet is opened in the lower half area.

[0024] Optionally, a first avoidance surface is provided on the end surface of the first water inlet channel, the first avoidance surface is provided at the upper portion of the first water inlet, and a first avoidance space is formed between the first avoidance surface and the first water inlet joint.

[0025] Optionally, the first avoidance surface is arranged to be inclined, and the first avoidance space is arranged to be gradually contracted in a direction approaching the first water inlet.

[0026] Optionally, a second avoidance surface is provided on the end surface of the second water inlet channel, the second avoidance surface is provided at the upper portion of the second water inlet, and a second avoidance space is formed between the second avoidance surface and the second water inlet joint.

[0027] Optionally, the second avoidance surface is arranged to be inclined, and the second avoidance space is arranged to be gradually reduced in a direction approaching the second water inlet.

[0028] Optionally, the water outlet channel includes a first water outlet channel and a second water outlet channel, and the water outlet includes a first water outlet and a second water outlet;

[0029] 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.

[0030] Optionally, the first one-way valve is configured as an umbrella valve or a valve diaphragm; and / or,

[0031] The second one-way valve is configured as an umbrella valve or a valve diaphragm.

[0032] The utility model also provides a water flosser, comprising the water pump as described above.

[0033] The technical solution of the utility model is to set a water pump cavity, a water inlet flow channel and a water outlet flow channel in the pump body, the plunger is slidably installed in the water pump cavity, the cavity wall of the water pump cavity is provided with a first water inlet, a second water inlet and a water outlet, the water inlet flow channel includes a first water inlet flow channel for communicating with the first water inlet, and a second water inlet flow channel for communicating with the second water inlet flow channel;

[0034] The first water inlet joint is arranged in the first water inlet channel, and the first water inlet joint has a first water outlet for communicating with the first water inlet, and is provided with a first one-way valve for controlling the first water outlet; and along the axial direction of the plunger, the first water outlet and the first water inlet are staggered, thereby reducing the possibility that when the first one-way valve is opened, the first one-way valve reversely blocks the first water inlet, causing the water flow in the first water inlet channel to be unable to smoothly flow into the pump water chamber.

[0035] The second water inlet joint is arranged in the second water inlet channel, and the second water inlet joint has a second water outlet for communicating with the second water inlet, and is provided with a second one-way valve for controlling the second water outlet, and the second water outlet and the second water inlet are staggered along the axial direction of the plunger, thereby reducing the possibility that when the second one-way valve is opened, the second one-way valve reversely blocks the second water inlet, causing the water flow in the second water inlet channel to be unable to smoothly flow into the pump water chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 It is a front view schematic diagram of an embodiment of the water pump of the utility model;

[0038] Figure 2 for Figure 1 Side view of the water pump;

[0039] Figure 3 for Figure 1 A top view of the middle pump body in the first water discharge state;

[0040] Figure 4 for Figure 3 Sectional view of the pump body along AA;

[0041] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0042] Figure 6 for Figure 4 A partial enlarged view of point B in the middle;

[0043] Figure 7 for Figure 1 A top view of the middle pump body in the second water discharge state;

[0044] Figure 8 for Figure 7 Sectional view of the middle pump body along BB;

[0045] Fig. 9 for Figure 1 A schematic diagram of the structure of the first water inlet and the second water inlet of the middle pump body;

[0046] Fig.10 for Figure 1 A schematic diagram of the assembly of the first water inlet joint and the first one-way valve of the middle pump body;

[0047] Fig.11 for Figure 1 Assembly diagram of the first water inlet joint and the second water inlet joint of the middle pump body.

[0048] Description of Figure Numbers:

[0049] Label name Label name 10 Water Pump 232 Second escape space 20 Pump body 24 First water outlet 21 Pump water chamber 25 Second water outlet 211 First water inlet 26 Inlet channel 212 Second water inlet 27 Outlet channel 213 First water outlet 30 Plunger 214 Second water outlet 40 First water inlet connector 22 First water inlet channel 41 Second water inlet connector 221 First avoidance surface 42 First check valve 222 The first escape space 43 Second check valve 23 Second water inlet channel 44 The first water outlet 231 Second avoidance surface 45 The second water outlet

[0050] 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

[0051] 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.

[0052] 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.

[0053] 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.

[0054] The utility model provides a water pump 10 for a water flosser.

[0055] In the embodiment of the present utility model, Figures 1 to 11 As shown, the water pump 10 comprises:

[0056] A pump body 20 and a plunger 30, wherein a water pumping chamber 21, a water inlet channel 26 and a water outlet channel 27 are provided in the pump body 20, and the plunger 30 is slidably mounted on the water pumping chamber 21, and a first water inlet 211, a second water inlet 212 and a water outlet are provided on the cavity wall of the water pumping chamber 21, and the water inlet channel 26 includes a first water inlet channel 22 for communicating with the first water inlet 211, and a second water inlet channel 23 for communicating with the second water inlet channel 23;

[0057] A first water inlet connector 40 is provided in the first water inlet channel 22. The first water inlet connector 40 has a first water outlet 44 for communicating with the first water inlet 211, and is provided with a first check valve 42 for controlling the first water outlet 44; and

[0058] A second water inlet connector 41 is provided in the second water inlet channel 23. The second water inlet connector 41 has a second water outlet 45 for communicating with the second water inlet 212, and is provided with a second check valve 43 for controlling the second water outlet 45. The plunger 30 reciprocates in the pump water chamber 21 to open the first check valve 42 and the second check valve 43 alternately.

[0059] Along the axial direction of the plunger 30 , the first water passage 44 and the first water inlet 211 are staggered; and / or the second water passage 45 and the second water inlet 212 are staggered.

[0060] Specifically, the water pump chamber 21 is arranged in the pump body 20, and the first water inlet 211, the second water inlet 212, and the water outlet 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, and the water outlet 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 so that the first water inlet 211 and the second water inlet 212 are opened alternately; 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 30 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.

[0061] 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 1 , Figure 2 , Figure 4 and Figure 8 , L in the figure is the axial direction of the plunger 30, and correspondingly, the plunger 30 reciprocates along its axial direction in the pump water chamber 21. Figure 5 The distance from the bottom of the first water inlet 211 to the bottom of the first water inlet channel 22 is L1, the distance from the bottom of the first water outlet 44 to the bottom of the first water inlet channel 22 is L2, and the distance from the bottom of the first check valve 42 to the bottom of the first water inlet channel 22 is L3. Figure 6 The distance from the bottom of the second water inlet 212 to the bottom of the second water inlet channel 23 is L1', the distance from the bottom of the second water outlet 45 to the bottom of the second water inlet channel 23 is L2', and the distance from the bottom of the second one-way valve 43 to the bottom of the second water inlet channel 23 is L3'.

[0062] Reference Figures 1 to 11 The first water inlet 211 is opened between the first water inlet channel 22 and the water pump chamber 21, and 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. In one embodiment, the first water inlet channel 22 is installed with a first water inlet joint 40, and the first water inlet joint 40 has a first water outlet 44 at one end close to the first water inlet 211, and the first check 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, it is controlled whether the first water inlet channel 22 is blocked, 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 set at the first water inlet connector 40, and controls the opening and closing of the first water outlet 44. Compared with setting the first one-way valve 42 at the first water inlet 211, this solution not only facilitates the installation of the first one-way valve 42 and the first water inlet connector 40, but also ensures the sealing effect of the first one-way valve 42.

[0063] Furthermore, along the axial direction of the plunger 30, the first water passage 44 and the first water inlet 211 are staggered. Figure 4 and Figure 5When the first water inlet channel 22 is blocked, the first check valve 42 presses the first water port 44 to close the first check valve 42. Therefore, the first check valve 42 must completely cover the first water port 44. If the first water port 44 and the first water inlet 211 are coaxially arranged, the first check valve 42 will also cover the first water inlet 211. When the water in the first water inlet channel 22 flows into the pump water chamber 21, the first check valve 42 moves toward the direction close to the first water inlet 211. At this time, the first check valve 42 may reversely block the first water inlet 211, so that the water in the first water inlet channel 22 cannot smoothly flow into the pump water chamber 21. Preferably, the first water inlet 211 at least partially extends out of the outer edge of the first check valve 42. In order to reduce the impact of the water in the pump water chamber 21 on the first water inlet 211, preferably, the first water inlet 211 is arranged on the side wall of the pump water chamber 21.

[0064] In other embodiments, the first one-way valve 42 may also be disposed between the first water inlet connector 40 and the first water inlet 211, and the first water inlet 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 pump water cavity 21. Preferably, the first one-way valve 42 is configured as an umbrella valve or a valve diaphragm to reduce the flow path of the first water inlet channel 22, so as to facilitate water intake by the water pump 10.

[0065] 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. In one embodiment, 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 212, and the second check 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 water pump chamber 21. At this time, the second one-way valve 43 is arranged at the second water inlet connector 41, and controls the opening and closing of the second water outlet 45. Compared with setting the second one-way valve 43 at the second water inlet 212, this solution not only facilitates the installation of the second one-way valve 43 and the second water inlet connector 41, but also ensures the sealing effect of the second one-way valve 43.

[0066] Furthermore, along the axial direction of the plunger 30, the second water inlet 45 and the second water inlet 212 are staggered. Figure 4 and Figure 6When the second water inlet channel 23 is blocked, the second one-way valve 43 presses the second water port 45 to close the second one-way valve 43. Therefore, the second one-way valve 43 must completely cover the second water port 45. If the second water port 45 and the second water inlet 212 are coaxially arranged, the second one-way valve 43 must also cover the second water inlet 212. When the water in the second water inlet channel 23 flows into the pump water chamber 21, the second one-way valve 43 moves toward the direction close to the second water inlet 212. At this time, the second one-way valve 42 may reversely block the second water inlet 212, so that the water in the second water inlet channel 23 cannot smoothly flow into the pump water chamber 21. Preferably, the second water inlet 212 at least partially extends out of the outer edge of the second one-way valve 43. In order to reduce the impact of the water in the pump water chamber 21 on the second water inlet 212, preferably, the second water inlet 212 is arranged on the side wall of the pump water chamber 21.

[0067] In other embodiments, the second one-way valve 43 may also be disposed between the second water inlet connector 41 and the second water inlet 212, and the second one-way valve 43 controls the second water inlet 212, thereby controlling the water flow of the second water inlet channel 23 to enter the pump water cavity 21. Preferably, the second one-way valve 43 is configured as an umbrella valve or a valve diaphragm to reduce the flow path of the second water inlet channel 23, so as to facilitate water intake by the water pump 10.

[0068] Reference Figure 5 and Figure 6 In one embodiment, along the axial direction of the plunger 30, the distance from the first water port 44 to the bottom of the first water inlet channel 22 is greater than the distance from the first water inlet 211 to the bottom of the first water inlet channel 22. Specifically, according to the use of the water flosser, the axial direction of the plunger 30 is the upper and lower directions of the water flosser, and the distance L2 from the bottom of the first water port 44 to the bottom of the first water inlet channel 22 is greater than the distance L1 from the bottom of the first water inlet 211 to the bottom of the first water inlet channel 22, that is, the setting height of the first water port 44 is greater than the setting height of the first water inlet 211, that is, the first water port 44 is arranged above the first water inlet 211, so that when the water flows from the first water port 44 into the first water inlet 211, it complies with the law that the water flows down along its own weight, thereby facilitating the water pump 10 to take water. When the pump water chamber 21 is draining, since the first water outlet 44 is arranged above the first water inlet 211 , the water flow needs to overcome gravity when impacting the first water outlet 44 , thereby further reducing the possibility of the water flow in the pump water chamber 21 entering the first water inlet channel 22 through the first water outlet 44 .

[0069] In one embodiment, along the axial direction of the plunger 30, the first water passage 44 partially overlaps with the first water inlet 211, and the size of the overlapping portion of the first water passage 44 and the first water inlet 211 is less than or equal to the radius of the first water inlet 211. Specifically, along the axial direction of the plunger 30, the first water passage 44 partially overlaps with the first water inlet 211, that is, the top of the first water inlet 211 is lower than the bottom of the first water passage 44, and at this time, the size of the overlapping portion of the first water passage 44 and the first water inlet 211 is less than or equal to the radius of the first water inlet 211. That is, the distance between the bottom of the first water passage 44 and the bottom of the first water inlet 211 is greater than the radius of the first water inlet 211, thereby ensuring that the first water passage 44 and the first water inlet 211 have a sufficient offset distance, so as to improve the water flow through the first water inlet 211 and the sealing of the edge of the first water passage 44.

[0070] In another embodiment, the first water passage 44 is spaced apart from the first water inlet 211 along the axial direction of the plunger 30. That is, the top of the first water inlet 211 is higher than the bottom of the first water passage 44, further improving the sealing of the edge of the first water passage 44 by the water flow through the first water inlet 211.

[0071] Among them, in order to ensure the water output of the first water inlet channel 22, a plurality of first water ports 44 are often provided. In the axial direction of the plunger 30, the plurality of first water ports 44 can partially overlap with the first water inlet 211, or can be spaced apart from the first water inlet 211. And the flow path of the water flow from the first water port 44 to the first water inlet 211 should not be too long, otherwise it is not conducive to the water intake of the pump water cavity 21. Therefore, in one embodiment, the first water inlet joint 40 has an upper half area close to the first water inlet 211, and a lower half area away from the first water inlet 211, and the first water port 44 is opened in the lower half area. That is, the first water port 44 is arranged close to the first water inlet 211, thereby reducing the flow path of the water flow from the first water port 44 to the first water inlet 211.

[0072] Refer again Figure 5 and Figure 6In one embodiment, the distance from the second water outlet 45 to the bottom of the second water inlet 23 is greater than the distance from the second water inlet 212 to the bottom of the second water inlet 23. Specifically, according to the use of the water flosser, the axial direction of the plunger 30 is the upper and lower directions of the water flosser, and the distance L2' from the bottom of the second water outlet 45 to the bottom of the second water inlet 23 is greater than the distance L1' from the bottom of the second water inlet 212 to the bottom of the second water inlet 23, that is, the setting height of the second water outlet 45 is greater than the setting height of the second water inlet 212, that is, the second water outlet 45 is arranged above the second water inlet 212, so that when the water flows from the second water outlet 45 into the second water inlet 212, it complies with the law that the water flows down along its own weight, thereby facilitating the water pump 10 to take water. When the pump water chamber 21 is draining, since the second water outlet 45 is arranged above the second water inlet 212 , the water flow needs to overcome gravity when impacting the second water outlet 45 , thereby further reducing the possibility of the water flow in the pump water chamber 21 entering the second water inlet channel 23 through the second water outlet 45 .

[0073] In one embodiment, along the axial direction of the plunger 30, the second water passage 45 partially overlaps with the second water inlet 212, and the size of the overlapping portion of the second water passage 45 and the second water inlet 212 is less than or equal to the radius of the second water inlet 212. Specifically, along the axial direction of the plunger 30, the second water passage 45 partially overlaps with the second water inlet 212, that is, the top of the second water inlet 212 is lower than the bottom of the second water passage 45, and at this time, the size of the overlapping portion of the second water passage 45 and the second water inlet 212 is less than or equal to the radius of the second water inlet 212. That is, the distance between the bottom of the second water passage 45 and the bottom of the second water inlet 212 is greater than the radius of the second water inlet 212, thereby ensuring that the second water passage 45 and the second water inlet 212 have a sufficient offset distance to improve the water flow through the second water inlet 212 and the sealing of the edge of the second water passage 45.

[0074] In another embodiment, the second water passage 45 is spaced apart from the second water inlet 212 along the axial direction of the plunger 30. That is, the top of the second water inlet 212 is higher than the bottom of the second water passage 45, further improving the water flow through the second water inlet 212 and the sealing of the edge of the second water passage 45.

[0075] In order to ensure the water output of the second water inlet channel 23, the second water outlet 45 is often provided with multiple ones. In the axial direction of the plunger 30, the multiple second water outlets 45 can partially overlap with the second water inlet 212, or can be arranged at intervals from the second water inlet 212, and the flow path of the water flow from the second water outlet 45 to the second water inlet 212 should not be too long, otherwise it is not conducive to the water intake of the pump water cavity 21. Therefore, in one embodiment, the second water inlet joint 41 has an upper half area close to the second water inlet 212 and a lower half area away from the second water inlet 212, and the second water outlet 45 is opened in the lower half area. That is, the second water outlet 45 is arranged close to the second water inlet 212, thereby reducing the flow path of the water flow from the second water outlet 45 to the second water inlet 212.

[0076] Reference Figures 4 to 6 , Fig.10 and Fig.11 In one embodiment, along the axial direction of the plunger 30, the first water inlet 211 is at least partially overlapped with the first one-way valve 42. That is, the distance L3 from the bottom of the first one-way valve 42 to the bottom of the first water inlet channel 22 is greater than the distance L1 from the bottom of the first water inlet 211 to the bottom of the first water inlet channel 22, that is, along the axial direction of the plunger 30, the bottom of the first one-way valve 42 is lower than the top of the first water inlet 211, thereby ensuring that when the water flow in the pump water chamber 21 impacts the first water inlet 211 under the action of the plunger 30, the water flow of the first water inlet 211 can further press the first one-way valve 42 against the first water outlet 44, thereby further reducing the possibility of water leakage from the first water outlet 44.

[0077] In another embodiment, along the axial direction of the plunger 30, the second water inlet 212 is at least partially overlapped with the second one-way valve 43. That is, the distance L3' from the bottom of the second one-way valve 43 to the bottom of the second water inlet channel 23 is greater than the distance L1' from the bottom of the second water inlet 212 to the bottom of the second water inlet channel 23, that is, along the axial direction of the plunger 30, the bottom of the second one-way valve 43 is lower than the top of the second water inlet 212, thereby ensuring that when the water flow in the pump water cavity 21 impacts the second water inlet 212 under the action of the plunger 30, the water flow of the second water inlet 212 can further press the second one-way valve 43 against the second water outlet 45, thereby further reducing the possibility of water leakage from the second water outlet 45.

[0078] Reference Figures 4 to 6 , Fig. 9In order to reduce water accumulation, in one embodiment, the bottom of the first water inlet 211 is higher than the bottom of the first water inlet channel 22, and the distance from the bottom of the first water inlet 211 to the bottom of the first water inlet channel 22 is less than or equal to 0.5 mm. Specifically, when the water flows out from the first water outlet 44 to the bottom of the first water inlet channel 22, and then flows into the pumping chamber 21 from the first water inlet 211, due to structural limitations, the bottom of the first water inlet 211 must not be lower than the bottom of the first water inlet channel 22. Therefore, if the bottom of the first water inlet 211 is higher than the bottom of the first water inlet channel 22, and the distance from the bottom of the first water inlet 211 to the bottom of the first water inlet channel 22 is greater than 0.5 mm, that is, L1>0.5 mm, the height of the first water inlet 211 is too high, and some liquid may stay between the first water inlet 211 and the first water outlet 44, resulting in water accumulation and prone to pumping dead zone. Therefore, the distance from the bottom of the first water inlet 211 to the bottom of the first water inlet channel 22 is less than or equal to 0.5 mm, which can not only reduce water accumulation but also facilitate the processing of the first water inlet 211. Specifically, the distance from the bottom of the first water inlet 211 to the bottom of the first water inlet channel 22 can be 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm and 0.1 mm, etc.

[0079] Preferably, the bottom of the first water inlet 211 is flush with the bottom of the first water inlet channel 22 to further reduce water accumulation.

[0080] In order to reduce water accumulation, in one embodiment, the bottom of the second water inlet 212 is higher than the bottom of the second water inlet channel 23, and the distance from the bottom of the second water inlet 212 to the bottom of the second water inlet channel 23 is less than or equal to 0.5 mm. Specifically, when the water flows out from the second water outlet 45 to the bottom of the second water inlet channel 23, and then flows into the pump water chamber 21 from the second water inlet 212, due to structural limitations, the bottom of the second water inlet 212 must not be lower than the bottom of the second water inlet channel 23. Therefore, if the bottom of the second water inlet 212 is higher than the bottom of the second water inlet channel 23, and the distance from the bottom of the second water inlet 212 to the bottom of the second water inlet channel 23 is greater than 0.5 mm, that is, L1'>0.5 mm, the height of the second water inlet 212 is too high, and some liquid may stay between the second water inlet 212 and the second water outlet 45, resulting in water accumulation and prone to pump water dead zone. Therefore, the distance from the bottom of the second water inlet 212 to the bottom of the second water inlet channel 23 is less than or equal to 0.5 mm, which can not only reduce water accumulation but also facilitate the processing of the second water inlet 212. Specifically, the distance from the bottom of the second water inlet 212 to the bottom of the second water inlet channel 23 can be 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm and 0.1 mm, etc.

[0081] Preferably, the bottom of the second water inlet 212 is flush with the bottom of the second water inlet channel 23 to further reduce water accumulation.

[0082] Reference Figure 5 and Figure 6 In order to further facilitate the flow of water from the first water passage 44 to the first water inlet 211, in one embodiment, a first avoidance surface 221 is provided on the end surface of the first water inlet channel 22, and the first avoidance surface 221 is provided at the upper part of the first water inlet 211, and a first avoidance space 222 is formed between the first avoidance surface 221 and the first water inlet joint 40. Specifically, the first avoidance surface 221 is provided at the upper part of the first water inlet 211, so the first avoidance surface 221 is provided in front of the first water passage 44, and the first check valve 42 is provided on the side of the first water passage 44 facing the first water inlet 211, so the first avoidance space 222 can give way to the first check valve 42 to a certain extent, so as to facilitate the deformation of the part of the first check valve 42 facing the first water passage 44 under the action of water pressure, thereby facilitating the flow of water from the first water passage 44 to the first water inlet 211.

[0083] Furthermore, the first avoidance surface 221 is inclined, and the first avoidance space 222 is gradually set in the direction close to the first water inlet 211. The first avoidance surface 221 is inclined, so as to further guide the water flow, and the first avoidance space 222 is gradually set in the direction close to the first water inlet 211, so as to further reduce the possibility that the water flow flows to the upper half of the first water inlet joint 40 under the action of the plunger 30 when the pressure of the first water inlet 211 increases.

[0084] Refer again Figure 5 and Figure 6 In one embodiment, the end surface of the second water inlet channel 23 is provided with a second avoidance surface 231, the second avoidance surface 231 is provided at the upper part of the second water inlet 212, and a second avoidance space 232 is formed between the second avoidance surface 231 and the second water inlet joint 41. Specifically, the second avoidance surface 231 is provided at the upper part of the second water inlet 212, so the second avoidance surface 231 is provided in front of the second water outlet 45, and the second one-way valve 43 is provided on the side of the second water outlet 45 facing the second water inlet 212, so the second avoidance space 232 can make way for the second one-way valve 43 to a certain extent, so that the part of the second one-way valve 43 facing the second water outlet 45 is deformed under the action of water pressure, thereby facilitating the water flow from the second water outlet 45 into the second water inlet 212.

[0085] Furthermore, the second avoidance surface 231 is inclined, and the second avoidance space 232 is gradually set in the direction close to the second water inlet 212. The second avoidance surface 231 is inclined, so as to further guide the water flow, and the second avoidance space 232 is gradually set in the direction close to the second water inlet 212, so as to further reduce the possibility that the water flow flows to the upper half of the second water inlet joint 41 under the action of the plunger 30 when the pressure of the second water inlet 212 increases.

[0086] Reference Figures 1 to 11 In one embodiment, the water outlet channel 27 includes a first water outlet channel 24 and a second water outlet channel 25, and the water outlet includes a first water outlet 213 and a second water outlet 214;

[0087] The water pump 10 has a first water outlet state and a second water outlet state which 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 pump water chamber 21 to switch the water pump 10 between the first water outlet state and the second water outlet state.

[0088] Specifically, the first water outlet 213 is opened between the first water outlet channel 24 and the water pump chamber 21. The first water outlet 213 is connected to the first water outlet channel 24, that is, the water flow of the water pump chamber 21 can enter the first water outlet channel 24 from the first water outlet 213. The opening and closing of the first water outlet 213 can be controlled to control the water flow of the water pump chamber 21 to enter the first water outlet channel 24; the water flow of the water pump chamber 21 can also be controlled to enter the first water outlet channel 24 by controlling whether the first water outlet channel 24 is blocked. Similarly, the second water outlet 214 is opened between the second water outlet channel 25 and the water pump chamber 21. The second water outlet 214 is connected to the second water outlet channel 25, that is, the water flow of the water pump chamber 21 can enter the second water outlet channel 25 from the second water outlet 214. The opening and closing of the second water outlet 214 can be controlled to control the water flow of the water pump chamber 21 to enter the second water outlet channel 25; the water flow of the water pump chamber 21 can also be controlled to enter the second water outlet channel 25 by controlling whether the second water outlet channel 25 is blocked.

[0089] Reference Figure 4In 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 Figure 8 , 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 water flosser 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 water flosser from the first water outlet channel 24 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 and stinging, thereby improving the user experience. And when the plunger 30 moves in the first direction and the second direction, water flow will be generated without interruption, thereby improving the work efficiency of the plunger 30, and then improving the cleaning efficiency of the water flosser. The first direction and the second direction are set opposite to each other along the axial direction of the plunger 30.

[0090] 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.

[0091] 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, a first water inlet, a second water inlet and a water outlet are provided on the cavity wall of the water pump cavity, the water inlet flow channel comprises a first water inlet flow channel for communicating with the first water inlet, and a second water inlet flow channel for communicating with the second water inlet flow channel; A first water inlet connector, provided in the first water inlet channel, the first water inlet connector having a first water outlet for communicating with the first water inlet, and provided with a first one-way valve for controlling the first water outlet; and a second water inlet joint, provided in the second water inlet flow channel, the second water inlet joint having a second water outlet for communicating with the second water inlet, and provided with a second one-way valve for controlling the second water outlet, the plunger reciprocatingly sliding in the water pump cavity to open the first one-way valve and the second one-way valve alternately; Along the axial direction of the plunger, the first water outlet and the first water inlet are staggered; and / or the second water outlet and the second water inlet are staggered.

2. The water pump according to claim 1, characterized in that Along the axial direction of the plunger, the distance from the first water outlet to the bottom of the first water inlet channel is greater than the distance from the first water inlet to the bottom of the first water inlet channel.

3. The water pump according to claim 2, characterized in that: Along the axial direction of the plunger, the first water passage partially overlaps with the first water inlet, and the size of the overlapping portion of the first water passage and the first water inlet is less than or equal to the radius of the first water inlet; or, Along the axial direction of the plunger, the first water outlet and the first water inlet are spaced apart.

4. The water pump according to claim 1, characterized in that The distance from the second water outlet to the bottom of the second water inlet channel is greater than the distance from the second water inlet to the bottom of the second water inlet channel.

5. The water pump according to claim 4, characterized in that Along the axial direction of the plunger, the second water passage and the second water inlet at least partially overlap, and the size of the overlapping portion of the second water passage and the second water inlet is less than or equal to the radius of the second water inlet; or, Along the axial direction of the plunger, the second water outlet and the second water inlet are spaced apart.

6. The water pump according to claim 1, characterized in that Along the axial direction of the plunger, the first water inlet is at least partially overlapped with the first one-way valve; and / or, Along the axial direction of the plunger, the second water inlet is at least partially overlapped with the second one-way valve.

7. The water pump according to claim 1, characterized in that The bottom of the first water inlet is higher than the bottom of the first water inlet channel, and the distance from the bottom of the first water inlet to the bottom of the first water inlet channel is less than or equal to 0.5 mm; and / or, The bottom of the second water inlet is higher than the bottom of the second water inlet channel, and the distance from the bottom of the second water inlet to the bottom of the second water inlet channel is less than or equal to 0.5 mm.

8. The water pump according to claim 1, characterized in that The bottom of the first water inlet is flush with the bottom of the first water inlet channel; and / or, The bottom of the first water inlet is flush with the bottom of the first water inlet channel.

9. The water pump according to claim 1, characterized in that: The first water inlet joint has an upper half area close to the first water inlet and a lower half area away from the first water inlet, and the first water outlet is opened in the lower half area; and / or, The second water inlet joint has an upper half area close to the second water inlet and a lower half area away from the second water inlet, and the second water outlet is opened in the lower half area.

10. The water pump according to claim 1, characterized in that The end surface of the first water inlet flow channel is provided with a first avoidance surface, the first avoidance surface is arranged at the upper part of the first water inlet, and a first avoidance space is formed between the first avoidance surface and the first water inlet joint.

11. The water pump according to claim 10, characterized in that The first avoidance surface is inclined, and the first avoidance space is gradually contracted in a direction approaching the first water inlet.

12. The water pump according to claim 1, characterized in that The end surface of the second water inlet flow channel is provided with a second avoidance surface, the second avoidance surface is arranged at the upper part of the second water inlet, and a second avoidance space is formed between the second avoidance surface and the second water inlet joint.

13. The water pump according to claim 12, characterized in that The second avoidance surface is inclined, and the second avoidance space is gradually contracted in a direction approaching the second water inlet.

14. The water pump according to any one of claims 1 to 13, characterized in that The water outlet channel includes a first water outlet channel and a second water outlet channel, and the water outlet includes a first water outlet and a second water outlet; 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.

15. The water pump according to any one of claims 1 to 13, characterized in that The first one-way valve is configured as an umbrella valve or a valve diaphragm; and / or, The second one-way valve is configured as an umbrella valve or a valve diaphragm.

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

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