Water pump and oral irrigator

Abstract

The water pump comprises a pump body and a plunger, a water pumping cavity, a water inlet flow channel and a water outlet flow channel are arranged in the pump body, the plunger is installed in the water pumping cavity in a sliding mode, and a water inlet and a water outlet are formed in the cavity wall of the water pumping cavity. The plunger comprises a plunger part installed in the water pumping cavity in a sliding mode and a plunger rod connected with one end of the plunger part. The pump body is provided with a water leakage prevention flow channel communicated with the water pumping cavity, and the water leakage prevention flow channel is used for collecting liquid flowing out from the position between the water pumping cavity and the plunger rod. According to the technical scheme, the possibility of leakage of the oral irrigator can be reduced.

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 used for oral care. It uses a certain pressure to spray a column of cleaning water from the nozzle of the water flosser to clean the user's oral cavity. Currently, water flossers are widely used in people's daily lives.

[0003] In the prior art, a water flosser includes a main unit, a water tank, a water pump and a nozzle. The water pump is provided with a water pump cavity. The main unit drives a plunger to move in the water pump cavity, thereby extracting water from the water tank and spraying it out from the nozzle, thereby realizing the water flossing operation. However, in actual operation, the liquid in the water pump cavity is prone to leakage, causing water leakage in the water flosser. Utility Model Content

[0004] The main purpose of the utility model is to provide a water pump, aiming to reduce the possibility of leakage of the water flosser.

[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 water inlet and a water outlet are opened on the cavity wall of the water pump cavity, and the plunger comprises a plunger portion slidably mounted in the water pump cavity, and a plunger rod connected to one end of the plunger portion;

[0007] 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.

[0008] Optionally, the pump body also includes a mounting joint, which blocks the opening of the pump water chamber, and the mounting joint is provided with a through hole, and an annular sealing structure is provided inside the through hole, and the plunger rod slides through the through hole and the annular sealing structure, and the leakage-proof water channel is used to collect liquid flowing out through the gap between the through hole and the plunger rod.

[0009] Optionally, the annular sealing structure comprises a plurality of sealing rings, and the plurality of sealing rings are arranged at intervals along the axial direction of the plunger rod.

[0010] Optionally, one side of the sealing ring is opened, and the openings of at least some of the sealing rings among the plurality of sealing rings are arranged toward the plunger part.

[0011] Optionally, the leakage-proof water flow channel includes a pressure relief section provided at the mounting joint, and a connecting section provided at one end of the pressure relief section away from the through hole, and the pressure relief section is provided between two adjacent sealing rings.

[0012] Optionally, the pressure relief section includes a groove section extending radially along the mounting joint, and an annular notch provided on the outer circumference of the mounting joint, wherein the inner side of the annular notch is connected to a plurality of the groove sections, and the outer side is connected to the connecting section.

[0013] Optionally, the mounting joint includes a first mounting ring portion and a second mounting ring portion, the first mounting ring portion is arranged close to the plunger portion, and a first plug-in ring groove is provided at one end of the first mounting ring portion away from the plunger portion, and the annular sealing structure is partially arranged in the first plug-in ring groove, and the second mounting ring portion has a first plug-in portion, and the first plug-in portion is partially plugged into the first plug-in ring groove, and the annular sealing structure is pressed into the first plug-in ring groove.

[0014] Optionally, the water pump also includes a sealing portion, and a second plug-in ring groove is provided at one end of the second mounting ring portion facing away from the first mounting ring portion, and another part of the annular sealing structure is provided in the second plug-in ring groove, and the sealing portion is plugged into the second plug-in ring groove and presses the annular sealing structure into the second plug-in ring groove.

[0015] Optionally, one end of the anti-leakage water channel away from the water pump cavity is connected to the water inlet channel or the water outlet channel.

[0016] Optionally, a drainage hole is provided on the pump body, and the drainage hole is connected to the leakage-proof water flow channel to discharge the liquid in the leakage-proof water flow channel.

[0017] Optionally, the water pump further comprises a control valve, which controls the opening and closing of the drainage hole.

[0018] Optionally, one end of the leakage-proof water channel away from the water pump cavity is used to communicate with a water storage cavity, and the water storage cavity is used to supply water to the water inlet channel.

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

[0020] 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.

[0021] Optionally, a sealing structure is provided on the plunger part to separate 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 leakage-proof water channel is connected to the second chamber.

[0022] The utility model also provides a water flosser, comprising the water pump as described above.

[0023] 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, and the plunger is slidably installed in the water pump cavity. The cavity wall of the water pump cavity is provided with a water inlet and a water outlet. The plunger includes a plunger part slidably installed in the water pump cavity, and a plunger rod connected to one end of the plunger part; the plunger rod is connected to the driving mechanism of the water flosser so that the plunger rod reciprocates in the water pump cavity. During actual use, the liquid in the water pump cavity is easy to seep out from the gap between the pump body and the plunger rod under the movement of the plunger, causing leakage of the water pump cavity. Therefore, the pump body is provided with a leak-proof water flow channel, which is connected to the water pump cavity, and the leak-proof water flow channel is used to collect the liquid flowing out between the water pump cavity and the plunger rod. The leak-proof water flow channel can collect the liquid seeping out of the gap between the pump body and the plunger rod, thereby reducing the possibility of leakage in the water pump cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 It is a front schematic diagram of the water pump of the utility model;

[0026] Figure 2 for Figure 1 Side view of the water pump;

[0027] Figure 3 for Figure 1 A top view of the middle pump body in the first water discharge state;

[0028] Figure 4 for Figure 3 Sectional view of the pump body along AA;

[0029] Figure 5 for Figure 1 A top view of the middle pump body in the second water discharge state;

[0030] Figure 6 for Figure 5 Sectional view of the middle pump body along BB;

[0031] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0032] Figure 8 for Figure 6 A schematic diagram of the structure of the first mounting ring portion at an angle;

[0033] Fig. 9 for Figure 6 A schematic structural diagram of the first mounting ring portion from another angle;

[0034] Fig.10 for Figure 6 A schematic diagram of the structure of the second mounting ring portion at an angle;

[0035] Fig.11 for Figure 6 Another angle structural diagram of the second mounting ring portion.

[0036] Description of Figure Numbers:

[0037] Label name Label name 10 Water Pump 24 Leak-proof water channel 11 Driving mechanism 241 Pressure relief section 111 Drive motor 242 Connected Segment 112 Transmission gear set 243 Slot 113 Transmission connector 244 Ring gap 20 Pump body 25 Water supply channel 21 Pump water chamber 30 Plunger 211 First water inlet 31 Plunger 212 Second water inlet 32 Plunger rod 213 First water outlet 40 Install the connector 214 Second water outlet 401 Through Hole 215 First chamber 41 Annular sealing structure 216 Second chamber 411 First sealing ring 217 Opening 412 Second sealing ring 22 Inlet channel 42 First mounting ring 221 First water inlet channel 421 First plug-in ring groove 222 Second water inlet channel 43 Second mounting ring 23 Outlet channel 431 First plug-in part 231 First water outlet 432 Second plug-in ring groove 232 Second water outlet 44 Blocking Department

[0038] 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

[0039] 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.

[0040] 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.

[0041] 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.

[0042] In the prior art, a water flosser includes a water flosser main unit, a water tank, a water pump, and a nozzle. A water pump cavity is provided in the water pump. The water flosser main unit drives the plunger to move in the water pump cavity, so that the pressure in the water pump cavity changes, thereby extracting water in the water tank and spraying it out from the nozzle to achieve the water flossing operation. In order to drive the reciprocating motion of the plunger in the water pump cavity, the water flosser main unit includes a driving motor and a driving assembly. The input end of the driving assembly is connected to the driving motor, and the output end is connected to the plunger rod (the driving assembly generally includes an eccentric wheel assembly and a driving arm. The driving motor drives the eccentric wheel assembly to rotate, thereby driving the driving arm to move linearly and drive the plunger rod to reciprocate). Therefore, the end face of the water pump cavity is provided with a through hole for the plunger rod or the driving arm to pass through, and for the convenience of assembly, the plunger rod is usually slidably passed through the through hole and connected to the driving arm. In this way, the liquid in the water pump cavity is likely to leak from the gap between the through hole and the plunger rod under the drive of the plunger rod, causing the water flosser to leak, affecting the normal use of the water flosser.

[0043] In view of this, the present invention provides a water pump 10 for use in a water flosser to reduce the possibility of water leakage in the water flosser.

[0044] In the embodiment of the present utility model, Figures 1 to 11 As shown, the water pump 10 includes a pump body 20 and a plunger 30. The pump body 20 is provided with a water pumping chamber 21, a water inlet channel 22 and a water outlet channel 23. The plunger 30 is slidably installed in the water pumping chamber 21. A water inlet and a water outlet are provided on the cavity wall of the water pumping chamber 21. The plunger 30 includes a plunger portion 31 slidably installed in the water pumping chamber 21, and a plunger rod 32 connected to one end of the plunger portion 31; the pump body 20 is provided with a leak-proof water channel 24 connected to the water pumping chamber 21, and the leak-proof water channel 24 is used to collect liquid flowing out between the water pumping chamber 21 and the plunger rod 32.

[0045] Specifically, the plunger 30 slides back and forth in the water pump chamber 21, thereby changing the pressure in the water pump chamber 21. When the plunger 30 moves along the first direction, the pressure in the water pump chamber 21 decreases, the water outlet is closed, and the water inlet is opened, so that the water flow in the water tank of the water flosser enters the water inlet channel 22 and enters the water pump chamber 21 from the water inlet to extract the liquid in the water storage chamber; then the plunger 30 moves along the second direction, so that the pressure in the water pump chamber 21 increases, the water outlet is opened, and the water inlet is closed, so that the liquid in the water pump chamber 21 is discharged from the water outlet and discharged from the water outlet channel 23 to the nozzle of the water flosser, thereby completing the water flossing operation.

[0046] Among them, the plunger 30 and the water pump chamber 21 are often configured in a cylindrical shape, so the axial direction of the plunger 30 is set parallel to the axial direction of the pump body 20. In the figure, L is the axial direction of the plunger 30. Correspondingly, the plunger 30 reciprocates along its axial direction in the water pump chamber 21, and the first direction and the second direction are set oppositely along the axial direction of the plunger 30.

[0047] The plunger 30 includes a plunger portion 31 slidably mounted in the water pump chamber 21 , and a plunger rod 32 connected to one end of the plunger portion 31 ; the dental flosser includes a driving mechanism 11 connected to the plunger rod 32 to drive the plunger 30 to reciprocate in the water pump chamber 21 . In this embodiment, the driving mechanism 11 includes a driving motor 111, a transmission gear set 112 and a transmission connection member 113, one of the transmission gear sets 112 is connected to the driving motor 111, one end of the transmission connection member 113 is eccentrically connected to another of the transmission gear sets 112, and the other end is connected to the plunger rod 32, and one end of the pump water chamber 21 is provided with a through hole 401 for the plunger rod 32 to pass through, the plunger rod 32 slides through the through hole 401 and is connected to the transmission connection member 113, so that the driving motor 111 can drive the transmission gear set 112 to rotate, and then drive the transmission connection member 113 to move, and drive the plunger 30 to move, so that the plunger rod 32 reciprocates in the through hole 401. In actual use, the liquid in the pump water chamber 21 is easy to seep out from the gap between the through hole 401 and the plunger rod 32 under the movement of the plunger 30, causing the pump water chamber 21 to leak.

[0048] Therefore, in this embodiment, the pump body 20 is provided with a leak-proof water flow channel 24, which is connected to the pump water chamber 21, that is, the leak-proof water flow channel 24 is connected to the gap between the through hole 401 and the plunger rod 32. The leak-proof water flow channel 24 is used to collect the liquid flowing out from between the pump water chamber 21 and the plunger rod 32, that is, to collect the liquid flowing out from the gap between the through hole 401 and the plunger rod 32, so as to collect the liquid seeping from the gap between the through hole 401 and the plunger rod 32, thereby reducing the possibility of leakage of the pump water chamber 21. Therefore, one end of the leak-proof water flow channel 24 is arranged on the side of the pump body 20 close to the plunger rod 32, but the extension direction of the leak-proof water flow channel 24 is not limited, so the end of the leak-proof water flow channel 24 away from the pump water chamber 21 can be located at any position of the pump body 20, and can also be connected to any flow channel to facilitate the discharge or secondary recovery of the collected liquid.

[0049] If the liquid collected by the anti-leakage water flow channel 24 is to be reused, in one embodiment, refer to Figures 1 to 6 , one end of the anti-leakage water channel 24 away from the pump water chamber 21 is connected to the water inlet channel 22. That is, the liquid collected by the anti-leakage water channel 24 is transported back to the water inlet channel 22, and then transported to the pump water chamber 21 again by the water inlet channel 22, so that the liquid leaked between the pump water chamber 21 and the plunger rod 32 is recycled for a second time, thereby reducing the utilization rate of the liquid in the water flosser, and there is no need to consider how to discharge the liquid in the anti-leakage water channel 24.

[0050] Among them, because the negative pressure inside the water inlet channel 22 is low when the liquid flows, the negative pressure inside the water inlet channel 22 is less than the negative pressure inside the anti-leakage water channel 24. Therefore, when the liquid in the anti-leakage water channel 24 flows to the vicinity of the water inlet channel 22, it can be discharged to the water inlet channel 22 driven by the liquid in the water inlet channel 22, and the liquid in the water inlet channel 22 is basically unlikely to flow back into the anti-leakage water channel 24. Therefore, the anti-leakage water channel 24 is arranged at an angle with the water inlet channel 22, and preferably, the anti-leakage water channel 24 is arranged perpendicular to the water inlet channel 22.

[0051] In another embodiment, one end of the anti-leakage water channel 24 away from the water pump chamber 21 is used to connect to the water storage chamber, and the water storage chamber is used to supply water to the water inlet channel 22. That is, the liquid collected by the anti-leakage water channel 24 is directly transported to the water storage chamber of the water flosser, and the water storage chamber can supply water to the water inlet channel 22. Since the pressure in the water storage chamber is constant, the anti-leakage water channel 24 only needs to be connected to the top of the water storage chamber, and there is no need to consider the problem of liquid backflow during design, which is convenient for users to design. However, this design method often leads to a longer overall length of the anti-leakage water channel 24, which is not conducive to the miniaturization design of the water flosser.

[0052] In another embodiment, one end of the anti-leakage water channel 24 away from the water pump chamber 21 is connected to the water outlet channel 23. That is, the liquid collected in the anti-leakage water channel 24 is re-transported to the water outlet channel 23, and then transported to the nozzle of the oral irrigator by the water outlet channel 23, so that the liquid leaked between the water pump chamber 21 and the plunger rod 32 is recycled for a second time, thereby reducing the utilization rate of the liquid in the oral irrigator, and there is no need to consider how to discharge the liquid in the anti-leakage water channel 24.

[0053] Among them, when the liquid in the water outlet flow channel 23 flows, the negative pressure inside it is high, and the negative pressure in the water outlet flow channel 23 is greater than the negative pressure in the anti-leakage water flow channel 24. Therefore, when the liquid in the anti-leakage water flow channel 24 flows to the vicinity of the water outlet flow channel 23, the liquid may flow back into the anti-leakage water flow channel 24. Therefore, a one-way valve can be provided at one end of the anti-leakage water flow channel 24 close to the water outlet flow channel 23 to reduce the possibility of liquid flowing back into the anti-leakage water flow channel 24. The anti-leakage water flow channel 24 is arranged at an angle with the water outlet flow channel 23. Preferably, the anti-leakage water flow channel 24 is arranged perpendicular to the water outlet flow channel 23.

[0054] To discharge the liquid collected in the anti-leakage water channel 24, in one embodiment, a drain hole is provided on the pump body 20, and the drain hole is connected to the anti-leakage water channel 24 to discharge the liquid in the anti-leakage water channel 24. Specifically, a drain port or a drain groove is also provided on the shell of the oral irrigator, and the drain hole is connected to the drain port or the drain groove to discharge the liquid in the anti-leakage water channel 24. The drain hole can directly penetrate the shell of the oral irrigator, so as to directly discharge the liquid in the anti-leakage water channel 24.

[0055] Furthermore, the water pump 10 further comprises a control valve, which controls the opening and closing of the drain hole. The control valve can control the opening and closing of the drain hole, thereby facilitating the user to discharge the liquid in the anti-leakage water flow channel 24 at a fixed time.

[0056] Reference Figures 1 to 7 In one embodiment, the pump body 20 also includes a mounting joint 40, which blocks the opening 217 of the pump water chamber 21. The mounting joint 40 is provided with a through hole 401, and an annular sealing structure 41 is provided inside the through hole 401. The plunger rod 32 slides through the through hole 401 and the annular sealing structure 41, and the leakage-proof water channel 24 is used to collect the liquid flowing out through the gap between the through hole 401 and the plunger rod 32.

[0057] Specifically, in order to facilitate the assembly of the pump body 20, an opening 217 is provided at one end of the water pump chamber 21, thereby facilitating the installation of the plunger 30, and then the opening 217 of the water pump chamber 21 is blocked by the mounting joint 40, thereby forming a closed chamber, and the through hole 401 is provided in the mounting joint 40. To ensure sealing, a sealing component is also provided between the mounting joint 40 and the opening 217, thereby reducing the possibility of leakage of the liquid in the water pump chamber 21. In other embodiments, the mounting joint 40 can also be integrally formed with the pump body 20, that is, both ends of the water pump chamber 21 are closed, and in this case, the pump body 20 can be composed of two half shells, thereby facilitating the installation of the plunger 30, or the plunger 30 is integrally formed in the water pump chamber 21.

[0058] In order to further reduce liquid leakage in the pump water chamber 21 , an annular sealing structure 41 is provided inside the through hole 401 , and the plunger rod 32 slides through the through hole 401 and the annular sealing structure 41 , thereby further ensuring the seal between the through hole 401 and the plunger rod 32 .

[0059] Furthermore, the annular sealing structure 41 includes a plurality of sealing rings, which are arranged at intervals along the axial direction of the plunger rod 32. Specifically, a plurality of sealing rings are arranged to increase the sealing effect of the annular sealing structure 41 and further reduce the possibility of liquid leakage in the pump water chamber 21. Preferably, the annular sealing structure 41 includes two sealing rings, and one end of the leakage-proof water flow channel 24 close to the through hole 401 is arranged between the two sealing rings, the sealing ring close to the pump water chamber 21 is set as the first sealing ring 411, and the other sealing ring is set as the second sealing ring 412, and the leakage-proof water flow channel 24 passes through the inner wall of the through hole 401. When the plunger 30 moves toward the side close to the through hole 401, the pressure of the plunger part 31 on the side of the plunger rod 32 increases, and the liquid in the pump water chamber 21 may pass through the first sealing ring 411 under the action of pressure. At this time, the liquid passing through the first sealing ring 411 is collected by the leakage-proof water flow channel 24, and due to the action of the leakage-proof water flow channel 24, the gap between the through hole 401 and the plunger rod 32 is decompressed, thereby reducing the liquid flow rate through the first sealing ring 411, and reducing the possibility of the liquid further passing through the second sealing ring 412, thereby improving the overall sealing of the annular sealing structure 41.

[0060] In other embodiments, the anti-leakage structure may also be disposed on a side of the annular sealing structure 41 close to the pump water chamber 21, or on a side of the annular sealing structure 41 away from the pump water chamber 21. In other embodiments, the annular sealing structure 41 may also include only one sealing ring, or the annular sealing structure 41 may include at least two sealing rings, such as 3 or 4 sealing rings.

[0061] Further, an opening 217 is provided on one side of the sealing ring, and the openings 217 of at least some of the sealing rings among the multiple sealing rings are provided toward the plunger portion 31. Specifically, the sealing ring is configured as a V-shaped sealing ring or a Y-shaped sealing ring, and an opening 217 is provided on one end of the sealing ring, and the openings 217 of at least some of the sealing rings among the multiple sealing rings are provided toward the plunger portion 31, that is, toward the pump water cavity 21, so that when the plunger rod 32 moves toward the direction close to the through hole 401, the opening 217 of the sealing ring opens, so as to further improve the sealing performance of the sealing ring to the pump water cavity 21, thereby improving the sealing effect of the annular sealing structure 41.

[0062] Among them, the openings 217 of at least some of the sealing rings among the multiple sealing rings are arranged toward the plunger portion 31. That is, the openings 217 of the multiple sealing rings can all be arranged toward the plunger portion 31, that is, only some of them are arranged toward the plunger portion 31; or, at least some of the sealing rings among the multiple sealing rings are ordinary sealing rings without openings 217.

[0063] Refer again Figures 1 to 7 In one embodiment, the anti-leakage water channel 24 includes a pressure relief section 241 disposed on the mounting joint 40, and a connecting section 242 disposed at one end of the pressure relief section 241 away from the through hole 401, and the pressure relief section 241 is disposed between two adjacent sealing rings. Specifically, the pressure relief section 241 is a section of the anti-leakage water channel 24 close to the pump water chamber 21, and the pressure relief section 241 penetrates the inner wall of the through hole 401 to connect the gap between the through hole 401 and the plunger rod 32, and preferably, the width of the end of the pressure relief section 241 close to the through hole 401 is greater than the width of other positions, so as to facilitate the collection of liquid.

[0064] Furthermore, the pressure relief section 241 includes a groove section 243 extending along the radial direction of the mounting joint 40, and an annular notch 244 provided on the outer periphery of the mounting joint 40, wherein the inner side of the annular notch 244 is connected to a plurality of groove sections 243, and the outer side is connected to the connecting section 242. Specifically, the groove section 243 extends along the radial direction of the mounting joint 40, and transports the liquid to the annular notch 244, and the annular notch 244 is provided around the outer periphery of the mounting joint 40, thereby facilitating the liquid transport to the connecting section 242, and reducing the liquid leakage between the mounting joint 40 and the opening 217.

[0065] Furthermore, the width of the connecting section 242 is greater than or equal to the width of the annular notch 244, thereby further reducing the possibility of liquid leakage between the mounting joint 40 and the opening 217. Of course, in other embodiments, the width of the connecting section 242 may also be less than the width of the annular notch 244. To facilitate the collection of liquid, preferably, the mounting joint 40 is provided with a plurality of groove sections 243, and the plurality of groove sections 243 are arranged at intervals along the circumference of the through hole 401. In other embodiments, the number of the groove section 243 may also be one.

[0066] Reference Figures 6 to 11 In one embodiment, the mounting joint 40 includes a first mounting ring portion 42 and a second mounting ring portion 43. The first mounting ring portion 42 is arranged close to the plunger portion 31. The end of the first mounting ring portion 42 away from the plunger portion 31 is provided with a first plug-in ring groove 421. The annular sealing structure 41 is partially provided in the first plug-in ring groove 421. The second mounting ring portion 43 has a first plug-in portion 431. The first plug-in portion 431 is partially plugged into the first plug-in ring groove 421 and the sealing ring is pressed in the first plug-in ring groove 421. Specifically, the mounting joint 40 is assembled through the first mounting ring portion 42 and the second mounting ring portion 43, so as to facilitate the assembly of the mounting joint 40, and the first mounting ring portion 42 is provided with a first plug-in ring groove 421, and the second mounting ring portion 43 has a first plug-in portion 431, and the first plug-in portion 431 is partially plugged into the first plug-in ring groove 421 to ensure the installation stability of the first mounting ring portion 42 and the second mounting ring portion 43, and a sealing ring of the annular sealing structure 41 can be provided in the first plug-in ring groove 421, and the end of the first plug-in portion 431 presses the sealing ring in the first plug-in ring groove 421, so as to facilitate the installation of the sealing ring and ensure the installation stability of the sealing ring.

[0067] Among them, the pressure relief section 241 can be configured as a pressure relief groove provided on the first plug-in portion 431, so as to facilitate the processing of the pressure relief section 241. In other embodiments, the first mounting ring portion 42 and the second mounting ring portion 43 can also be formed as one piece, and the inner wall of the through hole 401 is provided with an installation groove for installing the sealing ring, and the pressure relief section 241 is opened in the mounting joint 40.

[0068] Further, the water pump 10 further includes a blocking portion 44, a second plug-in ring groove 432 is provided at one end of the second mounting ring portion 43 away from the first mounting ring portion 42, another part of the annular sealing structure 41 is provided in the second plug-in ring groove 432, the blocking portion 44 is plugged into the second plug-in ring groove 432, and the sealing ring is pressed into the second plug-in ring groove 432. Specifically, the blocking portion 44 can further prevent the mounting joint 40 from being separated from the pump water cavity 21, and also facilitate the assembly of the mounting joint 40, the second mounting ring portion 43 is provided at one end away from the first mounting ring portion 42, the blocking portion 44 is plugged into the second plug-in ring groove 432, and the blocking portion 44 can be fastened and installed on the pump body 20 by fasteners or the like. Another sealing ring of the annular sealing structure 41 can be provided in the second plug-in ring groove 432, and the end of the blocking portion 44 presses the sealing ring into the second plug-in ring groove 432, so as to facilitate the installation of the sealing ring and ensure the installation stability of the sealing ring.

[0069] Reference Figures 1 to 6In one embodiment, the water inlet channel 22 includes a first water inlet channel 221 and a second water inlet channel 222, the water outlet channel 23 includes a first water outlet channel 231 and a second water outlet channel 232, the water inlet includes a first water inlet 211 and a second water inlet 212, and the water outlet includes a first water outlet 213 and a second water outlet 214;

[0070] 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 221, and the second water outlet 214 is connected to the second water outlet channel 232; in the second water outlet state, the second water inlet 212 is connected to the second water inlet channel 222, and the first water outlet 213 is connected to the first water outlet channel 231; 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.

[0071] Specifically, the first water inlet 211 is opened between the first water inlet channel 221 and the water pump chamber 21, and the water flow of the first water inlet channel 221 can enter the water pump chamber 21 from the first water inlet 211; the second water inlet 212 is opened between the second water inlet channel 222 and the water pump chamber 21, and the water flow of the second water inlet channel 222 can enter the water pump chamber 21 from the second water inlet 212; the first water outlet 213 is opened between the first water outlet channel 231 and the water pump chamber 21, and the water flow of the water pump chamber 21 can enter the first water outlet channel 231 from the first water outlet 213; the second water outlet 214 is opened between the second water outlet channel 232 and the water pump chamber 21, and the water flow of the water pump chamber 21 can enter the second water outlet channel 232 from the second water outlet 214.

[0072] Reference Figure 4 In the first water outlet state, the first water inlet 211 is connected to the first water inlet channel 221, and the second water outlet 214 is connected to the second water outlet channel 232; 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 221 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 232 to form a first pulse water flow. Then, refer to Figure 5, 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 222; 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 231 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 a stinging sensation, 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.

[0073] The water inlet channel 22 further includes a water supply channel 25, which extends along the axial direction of the plunger 30 and sequentially connects the first water inlet channel 221 and the second water inlet channel 222. The end of the anti-leakage water channel 24 away from the pump water chamber 21 is connected to the water supply channel 25 to connect the first water inlet channel 221 and the second water inlet channel 222.

[0074] Furthermore, a sealing structure is provided on the plunger portion 31 to separate the pump water 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, the second water inlet 212 and the second water outlet 214 are provided in the second chamber 216, and the leakage-proof water channel 24 is connected to the second chamber 216. Specifically, 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.

[0075] In this embodiment, the first water inlet 211 and the first water outlet 213 are provided in the first chamber 215, the second water inlet 212 and the second water outlet 214 are provided in the second chamber 216, and the anti-leakage water channel 24 is connected to the second chamber 216. In other embodiments, the first water inlet 211 and the first water outlet 213 are provided in the second chamber 216, the second water inlet 212 and the second water outlet 214 are provided in the first chamber 215, and the anti-leakage water channel 24 is connected to the first chamber 215.

[0076] If the first chamber 215 and the second chamber 216 are separated only by the plunger 31, it is difficult to ensure that the airflow or water flow does not move relative to each other under the action of pressure, which affects the water outflow and water inflow of the pump water chamber 21. Therefore, a sealing structure is provided on the plunger 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.

[0077] 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.

[0078] 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 water inlet and a water outlet are opened on the cavity wall of the water pump cavity, and the plunger comprises a plunger portion slidably mounted in the water pump cavity, 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.

2. The water pump according to claim 1, characterized in that The pump body also includes a mounting joint, which blocks the opening of the pump water chamber. The mounting joint is provided with a through hole, and an annular sealing structure is provided inside the through hole. The plunger rod slides through the through hole and the annular sealing structure, and the leak-proof water flow channel is used to collect liquid flowing out through the gap between the through hole and the plunger rod.

3. The water pump according to claim 2, characterized in that: The annular sealing structure includes a plurality of sealing rings, and the plurality of sealing rings are arranged at intervals along the axial direction of the plunger rod.

4. The water pump according to claim 3, characterized in that: The sealing ring is opened at one side, and the openings of at least some of the sealing rings among the plurality of sealing rings are arranged toward the plunger portion.

5. The water pump according to claim 3, characterized in that: The anti-leakage water flow channel comprises a pressure relief section arranged at the mounting joint, and a connecting section arranged at one end of the pressure relief section away from the through hole, and the pressure relief section is arranged between two adjacent sealing rings.

6. The water pump according to claim 5, characterized in that The pressure relief section includes a groove section extending along the radial direction of the mounting joint, and an annular notch arranged on the outer circumference of the mounting joint. The inner side of the annular notch is connected to a plurality of the groove sections, and the outer side is connected to the connecting section.

7. The water pump according to claim 2, characterized in that: The mounting joint includes a first mounting ring portion and a second mounting ring portion, the first mounting ring portion is arranged close to the plunger portion, and a first plug-in ring groove is provided at one end of the first mounting ring portion away from the plunger portion, the annular sealing structure is partially arranged in the first plug-in ring groove, and the second mounting ring portion has a first plug-in portion, the first plug-in portion is partially plugged into the first plug-in ring groove, and the annular sealing structure is pressed into the first plug-in ring groove.

8. The water pump according to claim 7, characterized in that The water pump also includes a sealing portion, and a second plug-in ring groove is provided at one end of the second mounting ring portion facing away from the first mounting ring portion, and another part of the annular sealing structure is provided in the second plug-in ring groove. The sealing portion is plugged into the second plug-in ring groove and presses the annular sealing structure into the second plug-in ring groove.

9. The water pump according to claim 1, characterized in that: One end of the anti-leakage water flow channel away from the water pump cavity is connected to the water inlet flow channel or the water outlet flow channel.

10. The water pump according to claim 1, characterized in that The pump body is provided with a drainage hole, which is connected to the anti-leakage water flow channel to discharge the liquid in the anti-leakage water flow channel.

11. The water pump according to claim 10, characterized in that The water pump further includes a control valve which controls opening and closing of the drainage hole.

12. The water pump according to claim 1, characterized in that One end of the anti-leakage water channel away from the water pump cavity is used to communicate with a water storage cavity, and the water storage cavity is used to supply water to the water inlet channel.

13. The water pump according to any one of claims 1 to 12, characterized in that The water inlet channel includes a first water inlet channel and a second water inlet channel, the water outlet channel includes a first water outlet channel and a second water outlet channel, the water inlet includes a first water inlet and a second water inlet, 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.

14. The water pump according to claim 13, characterized in that A sealing structure is provided on the plunger part to separate 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 leakage-proof water channel is connected to the second chamber.

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

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