Water pump and oral irrigator

Abstract

The water pump comprises a pump body and a water outlet connector, the pump body is provided with a water pumping cavity, a water inlet and a water outlet, the water inlet and the water outlet are communicated with the water pumping cavity, and a water inlet one-way valve is arranged at the water inlet. The water outlet connector is installed at a water outlet of the pump body, a water passing channel communicated with the water outlet is formed in the water outlet connector, a water outlet one-way valve is arranged in the water passing channel and comprises a blocking piece and an elastic piece, one end of the elastic piece is connected with the water outlet connector, the other end of the elastic piece is connected with the blocking piece, and the elastic piece enables the blocking piece to have the trend of blocking the water outlet. The water pump has a water inlet state and a water outlet state which are mutually switched, in the water inlet state, the water inlet one-way valve is opened, and the plugging piece plugs the water outlet; in the water outlet state, the water inlet one-way valve is closed, and the blocking piece is separated from the water outlet so that liquid in the pump body can flow out. According to the technical scheme, the service life of the water outlet one-way valve can be prolonged, and noise generated when water flows out of the water pump is 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] An oral irrigator is an auxiliary tool for cleaning the oral cavity. It generates a pulsed water flow through a water pump to clean the teeth and the gaps between teeth. Currently on the market, the one-way valve used in the outlet of the water pump inside the oral irrigator is usually a duckbill valve. The duckbill valve is usually made of soft rubber, and in order to facilitate the deformation of the duckbill valve under pressure, the hole wall at the water outlet is often thinner. Under the impact of water pressure, the hole wall at the water outlet is easily torn, affecting the service life of the water pump. In addition, the duckbill valve often produces a lot of noise when in use, which is not conducive to the user experience. Utility Model Content

[0003] The main purpose of the utility model is to provide a water pump, aiming to increase the service life of a water outlet one-way valve and reduce the noise of the water pump when discharging water.

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

[0005] A pump body, wherein the pump body is provided with a water pump cavity, and a water inlet and a water outlet communicating with the water pump cavity, and the water inlet is provided with a water inlet check valve; and

[0006] A water outlet joint is installed at the water outlet of the pump body, a water flow channel connected to the water outlet is provided in the water outlet joint, a water outlet check valve is provided in the water flow channel, the water outlet check valve includes a blocking member and an elastic member, one end of the elastic member is connected to the water outlet joint, and the other end is connected to the blocking member, and the elastic member enables the blocking member to have a tendency to block the water outlet;

[0007] The water pump has a water inlet state and a water outlet state that can be switched to each other. In the water inlet state, the water inlet check valve is opened and the blocking member blocks the water outlet; in the water outlet state, the water inlet check valve is closed and the blocking member is separated from the water outlet to allow the liquid in the pump body to flow out.

[0008] Optionally, a mounting groove is provided at one end of the blocking member away from the water outlet, a connecting column is provided in the water flow channel of the water outlet joint, one end of the elastic member is sleeved on the connecting column, and the other end of the elastic member is installed in the mounting groove.

[0009] Optionally, the connecting column at least partially extends into the mounting groove.

[0010] Optionally, the connecting column is connected to the inner wall of the water flow channel via a connecting portion, and a first water outlet is provided on the connecting portion.

[0011] Optionally, the connecting column, the water flow channel and the water outlet are coaxially arranged.

[0012] Optionally, the pump body forms a mounting groove on the outer periphery of the water outlet, the water outlet protrudes from the bottom wall of the mounting groove, the water outlet joint is inserted into the mounting groove, and the water flow channel is sleeved on the water outlet and abuts against the outer peripheral surface of the water outlet.

[0013] Optionally, the depth of the portion of the water flow channel that is sleeved on the water outlet is less than or equal to 5 mm.

[0014] Optionally, a supporting protrusion is provided on one side of the bottom wall of the mounting ring groove, one side of the water outlet joint abuts against the supporting protrusion, and the other side is spaced apart from the bottom wall.

[0015] Optionally, the pump body further comprises a water inlet channel connecting the water inlet and the water pump cavity, and a portion of the water inlet channel extends into the mounting ring groove to form the supporting protrusion.

[0016] Optionally, in the water inlet state, the blocking member abuts against an end surface of the water outlet; in the water outlet state, the blocking member is spaced apart from the water outlet.

[0017] Optionally, the diameter of the blocking member is larger than the inner diameter of the water outlet and smaller than the outer diameter of the water outlet; and / or,

[0018] The blocking member is coaxially arranged with the water outlet.

[0019] Optionally, the distance between the outer periphery of the blocking member and the inner wall of the water flow channel of the water outlet joint is less than or equal to 0.5 mm.

[0020] Optionally, the blocking member includes a main body portion and a positioning protrusion protruding from a peripheral side of the main body portion, and a water-passing gap is formed between two adjacent positioning protrusions.

[0021] Optionally, a water inlet joint is installed at the water inlet, and a second water outlet is opened on the water inlet joint, and the water inlet one-way valve is arranged on the water inlet joint to control the second water outlet.

[0022] Optionally, the water inlet one-way valve is configured as an umbrella valve or a valve diaphragm.

[0023] The utility model also provides a water flosser, comprising the water pump as described above.

[0024] The technical solution of the utility model is that a pumping cavity and a water inlet and a water outlet connected to the pumping cavity are opened in the pump body, and a water inlet check valve is arranged at the water inlet; a water outlet joint is installed at the water outlet of the pump body, a water flow channel connected to the water outlet is opened in the water outlet joint, a water outlet check valve is arranged in the water flow channel, and the water outlet check valve comprises a blocking member and an elastic member, one end of the elastic member is connected to the water outlet joint, and the other end is connected to the blocking member, and the elastic member enables the blocking member to have a tendency to block the water outlet.

[0025] In the water inlet state, the pressure in the water chamber of the pump decreases. Under the action of the pressure, the water inlet check valve opens and the plugging piece blocks the water outlet. Then the water pump is converted from the water inlet state to the water outlet state. At this time, the pressure in the water chamber of the pump increases. Under the action of the pressure, the water inlet check valve closes, and the plugging piece is separated from the water outlet, thereby opening the water outlet to allow the liquid in the pump body to flow out. Therefore, this solution mainly relies on the movement of the plugging piece to open and close the water outlet. Compared with the duckbill valve, the water outlet check valve in this solution is less likely to break and is less likely to generate noise due to the impact of the water flow, thereby increasing the service life of the water outlet check valve, reducing the noise when the water pump is discharging water, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the tooth flosser of the utility model;

[0028] Figure 2 for Figure 1 A schematic diagram of the internal structure of the middle water flosser;

[0029] Figure 3 It is a structural schematic diagram of an embodiment of the water pump of the utility model from one angle;

[0030] Figure 4 for Figure 1 A schematic diagram of the structure of the water pump from another angle;

[0031] Figure 5 for Figure 4 Section along AA;

[0032] Figure 6 for Figure 5 A partial enlarged view of the center

[0033] Figure 7 for Figure 3 A structural schematic diagram of a middle water outlet joint at one angle;

[0034] Figure 8 for Figure 3 A structural schematic diagram of the middle water outlet joint from another angle;

[0035] Fig. 9 for Figure 3 A schematic diagram of the structure of the middle plugging member;

[0036] Fig.10 for Figure 3 A schematic structural diagram of the water inlet joint at one angle.

[0037] Description of Figure Numbers:

[0038]

[0039]

[0040] 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

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In the prior art, the one-way valve used in the water outlet of the water pump inside the water flosser is usually a duckbill valve, and along the water outlet direction of the water pump, the water passage of the duckbill valve gradually decreases. Under the action of the pressure in the water chamber of the pump, the water outlet hole of the duckbill valve is deformed to spray out the water. Therefore, the duckbill valve is usually made of soft rubber, and in order to facilitate the deformation of the duckbill valve under the action of pressure, the hole wall at the water outlet is often thinner. When it is under the impact of water pressure, the inner diameter of the water outlet increases, and the hole wall is further thinned, which can easily cause the hole wall of the water outlet to tear, causing the water outlet one-way valve to fail, and the water outlet one-way valve in the water pump is difficult to replace, so it will affect the service life of the entire water pump, and the duckbill valve often produces a large noise when discharging water, which is not conducive to the user experience.

[0045] The utility model provides a water pump 100 .

[0046] In the embodiment of the present utility model, Figures 1 to 10 As shown, the water pump 100 includes a pump body 10 and a water outlet joint 20. The pump body 10 is provided with a water pump cavity 11, and a water inlet 12 and a water outlet 13 connected to the water pump cavity 11. The water inlet 12 is provided with a water inlet check valve 50; the water outlet joint 20 is installed at the water outlet 13 of the pump body 10, and a water flow channel 21 connected to the water outlet 13 is provided in the water outlet joint 20. The water flow channel 21 is provided with a water outlet check valve 30, and the water outlet check valve 30 includes a blocking member 31 and The elastic member 32 has one end connected to the water outlet joint 20 and the other end connected to the blocking member 31, and the elastic member 32 causes the blocking member 31 to have a tendency to block the water outlet 13; the water pump 100 has a water inlet state and a water outlet state that can be switched to each other. In the water inlet state, the water inlet check valve 50 is opened and the blocking member 31 blocks the water outlet 13; in the water outlet state, the water inlet check valve 50 is closed and the blocking member 31 is separated from the water outlet 13 to allow the liquid in the pump body 10 to flow out.

[0047] Specifically, the water pump chamber 11 is opened on the pump body 10, and the water inlet 12 and the water outlet 13 are both connected to the water pump chamber 11. The water inlet 12 and the water outlet 13 can be opened on the cavity wall of the water pump chamber 11 to connect the water pump chamber 11; the water inlet 12 and the water outlet 13 can also be connected to the water pump chamber 11 through a specific flow channel. And the water pump 100 can be configured as a plunger pump. In this case, the driving part 70 is configured as a plunger, the water pump chamber 11 is completely arranged on the pump body 10, and the plunger part of the plunger slides back and forth in the water pump chamber 11 to realize the water inlet and outlet of the water pump chamber 11; refer to Figure 2 and Figure 5 The water pump 100 can also be configured as a diaphragm pump. In this case, the driving part 70 is configured as a pump cup capsule. The pump water cavity 11 is formed by the pump body 10 and the pump cup capsule. The pump cup capsule reciprocates to achieve water inflow and outflow of the pump water cavity 11. The driving mechanism 80 drives the driving part 70 to move or vibrate to achieve pressure changes in the pump water cavity 11. The driving mechanism 80 includes a driving motor 81, a transmission gear set 82 and a transmission connecting member 83. One of the transmission gear sets 82 is connected to the driving motor 81. One end of the transmission connecting member 83 is eccentrically connected to another one of the transmission gear sets 82, and the other end is connected to the driving part 70, so that the driving motor 81 can drive the transmission gear set 82 to rotate, thereby driving the transmission connecting member 83 to move, and driving the driving part 70 to move or vibrate.

[0048] The driving unit 70 moves in a direction away from the water outlet 13, and the water pump 100 is switched to a water inlet state. At this time, the pressure in the water pump chamber 11 decreases. Under the action of the pressure, the water inlet check valve 50 opens, and the blocking member 31 blocks the water outlet 13. Then, the driving unit 70 moves in a direction close to the water outlet 13, and the water pump 100 is switched from a water inlet state to a water outlet state. At this time, the pressure in the water pump chamber 11 increases. Under the action of the pressure, the water inlet check valve 50 closes, and the blocking member 31 separates from the water outlet 13, thereby opening the water outlet 13 to allow the liquid in the pump body 10 to flow out.

[0049] Reference Figures 3 to 5, and a water outlet connector 20 is provided at the water outlet 13 of the pump body 10, and a water flow channel 21 connected to the water outlet 13 is provided in the water outlet connector 20, so that the water in the pump water chamber 11 flows from the water outlet 13 to the water flow channel 21 to the nozzle 61 of the water flosser 60. A water outlet check valve 30 is provided in the water flow channel 21, and the water outlet check valve 30 includes a blocking member 31 and an elastic member 32, one end of the elastic member 32 is connected to the water outlet connector 20, and the other end is connected to the blocking member 31, and the elastic member 32 makes the blocking member 31 have a tendency to block the water outlet 13, so that in the water inlet state, the elastic member 32 presses the blocking member 31 at the water outlet 13, thereby ensuring the sealing of the water outlet 13, and in the water outlet state, under the action of pressure, the water flow overcomes the elastic potential energy of the elastic member 32, so that the blocking member 31 moves in the direction of leaving the water outlet 13, thereby facilitating the water flow to flow out. Therefore, the present solution mainly relies on the movement of the blocking member 31 to realize the opening and closing of the water outlet 13. Compared with the duckbill valve, the water outlet one-way valve 30 in the present solution is less likely to break and is less likely to generate noise due to the impact of the water flow, thereby increasing the service life of the water outlet one-way valve 30 and reducing the noise when the water pump discharges water, thereby improving the user experience.

[0050] Among them, the blocking member 31 can be directly extended into the water outlet 13, or it can abut against the end face of the water outlet 13 to ensure the blocking of the water outlet 13. In this embodiment, the blocking member 31 abuts against the end face of the water outlet 13. In the water inlet state, under the action of the pressure in the water pump chamber 11, the blocking member 31 further presses the end face of the water outlet 13, thereby ensuring the sealing of the water outlet 13; in the water outlet state, under the action of the pressure, the blocking member 31 is spaced from the water outlet 13, thereby facilitating the outflow of water. In other embodiments, the blocking member 31 of the water outlet one-way valve 30 can also control the outflow of water from the water pump chamber 11 by blocking the water outlet flow channel. At this time, the blocking member 31 blocks the end face of the water outlet flow channel.

[0051] The technical solution of the utility model is that a pump chamber 11 and a water inlet 12 and a water outlet 13 connected to the pump chamber 11 are opened in the pump body 10, and a water inlet check valve 50 is provided at the water inlet 12; a water outlet joint 20 is installed at the water outlet 13 of the pump body 10, a water flow channel 21 connected to the water outlet 13 is opened in the water outlet joint 20, a water outlet check valve 30 is provided in the water flow channel 21, and the water outlet check valve 30 includes a blocking member 31 and an elastic member 32, one end of the elastic member 32 is connected to the water outlet joint 20, and the other end is connected to the blocking member 31, and the elastic member 32 makes the blocking member 31 have a tendency to block the water outlet 13.

[0052] In the water inlet state, the pressure in the water pump chamber 11 decreases. Under the action of the pressure, the water inlet check valve 50 opens, and the blocking member 31 blocks the water outlet 13. Then the water pump 100 is converted from the water inlet state to the water outlet state. At this time, the pressure in the water pump chamber 11 increases. Under the action of the pressure, the water inlet check valve 50 closes, and the blocking member 31 is separated from the water outlet 13, thereby opening the water outlet 13 to allow the liquid in the pump body 10 to flow out. Therefore, in this solution, the opening and closing of the water outlet 13 is mainly achieved by the movement of the blocking member 31. Compared with the duckbill valve, the water outlet check valve 30 in this solution is less likely to break, and is less likely to generate noise due to the impact of the water flow, thereby increasing the service life of the water outlet check valve 30, reducing the noise when the water pump is discharging water, and improving the user experience.

[0053] To ensure the stability of the water outlet check valve 30, in one embodiment, refer to Figure 3 , Figure 5 , Figure 7 and Figure 8 , a mounting groove 311 is provided at one end of the blocking member 31 away from the water outlet 13, a connecting column 22 is provided in the water flow passage 21 of the water outlet joint 20, one end of the elastic member 32 is sleeved on the connecting column 22, and the other end of the elastic member 32 is installed in the mounting groove 311. Specifically, the mounting groove 311 can be inserted into the other end of the elastic member 32, so as to facilitate the installation of the other end of the elastic member 32, and the mounting groove 311 can guide the movement of the other end of the elastic member 32, and a connecting column 22 is provided in the water flow passage 21 of the water outlet joint 20, and one end of the elastic member 32 is sleeved on the connecting column 22, so as to facilitate the installation of one end of the elastic member 32, and the connecting column 22 can guide the movement of one end of the elastic member 32, thereby reducing the possibility of the elastic member 32 being offset or bent during the movement, thereby ensuring that the blocking member 31 can accurately block the end face of the water outlet 13 and ensure the movement stability of the water outlet check valve 30.

[0054] The elastic member 32 may be configured as a compression spring, so that the installation of the elastic member 32 is convenient and the water flow is not affected. In other embodiments, the elastic member 32 may also be an elastic block.

[0055] Furthermore, the connecting column 22 at least partially extends into the mounting groove 311. That is, no matter whether the spring is in a compressed state (the one-way valve is open) or in an extended state (the one-way valve is closed), the connecting column 22 at least extends into the mounting groove 311. Therefore, no matter what state the elastic member 32 is in, it is always sandwiched between the connecting column 22 and the mounting groove 311, thereby jointly guiding the movement of the elastic member 32, further improving the movement stability of the water outlet one-way valve 30.

[0056] Furthermore, the connecting column 22, the water flow channel 21 and the water outlet 13 are coaxially arranged. Specifically, the connecting column 22 is arranged on the axis of the water flow channel 21, and the water outlet joint 20 is coaxially installed with the water outlet 13, so as to ensure that the water outlet check valve 30 always moves along the axis of the water flow channel 21, thereby further improving the movement stability of the water outlet check valve 30.

[0057] Refer again Figure 3 , Figure 5 , Figure 7 and Figure 8 In one embodiment, the connecting column 22 is connected to the inner wall of the water flow channel 21 through the connecting portion 23, and a first water outlet 24 is provided on the connecting portion 23. Specifically, in order to facilitate the installation of the connecting column 22, a connecting portion 23 is convexly provided on the peripheral side of the connecting column 22 to ensure the installation stability of the connecting column 22, and in order to ensure that the connecting portion 23 can supply water flow, a first water outlet 24 is provided on the connecting portion 23. In this embodiment, the first water outlet 24 is configured as a water notch 314 provided at the edge of the connecting portion 23, so that the connecting portion 23 is configured as a "cross" structure, and the connecting portion 23 and the inner wall of the water flow channel 21 together enclose the first water outlet 24.

[0058] In order to reduce the dead zone of the pump, in one embodiment, refer to Figure 5 and Figure 6 The pump body 10 is formed with a mounting annular groove 14 on the outer periphery of the water outlet 13, the water outlet 13 protrudes from the bottom wall of the mounting annular groove 14, the water outlet joint 20 is plugged into the mounting annular groove 14, and the water flow passage 21 is sleeved on the water outlet 13 and abuts against the outer periphery of the water outlet 13. Specifically, the outer periphery of the water outlet 13 is formed with a mounting annular groove 14, the water outlet 13 protrudes from the bottom wall of the mounting annular groove 14, the outer periphery of the water outlet 13 and the inner periphery of the pump body 10 are arranged at intervals to form the mounting annular groove 14 together, and the water outlet joint 20 can be plugged into the mounting annular groove 14, thereby ensuring the installation stability of the water outlet joint 20. However, when water flows out from the water outlet 13, part of the water is likely to stay in the mounting groove 14 and accumulate between the groove wall of the mounting groove 14 and the water outlet joint 20, resulting in a pumping dead zone. Therefore, the inner wall of the water flow channel 21 abuts against the outer peripheral surface of the water outlet 13, thereby further preventing the water from accumulating in the mounting groove 14 and causing a pumping dead zone.

[0059] The inner wall of the water passage 21 and the outer peripheral surface of the water outlet 13 can adopt transition or interference fit. In other embodiments, the water outlet 13 can also be arranged flush with the bottom wall of the mounting ring groove 14, or be arranged concave relative to the bottom wall of the mounting ring groove 14 toward the direction of the pump water chamber 11.

[0060] Furthermore, the depth of the portion of the water passage 21 sleeved on the water outlet 13 is less than or equal to 5 mm. If the depth of the portion of the water passage 21 sleeved on the water outlet 13 is greater than 5 mm, the depth is too deep, and the water outlet joint 20 may require a lot of force to be fully inserted into the mounting ring groove 14, which is not conducive to the assembly of the water outlet joint 20. Therefore, the depth of the portion of the water passage 21 sleeved on the water outlet 13 is less than or equal to 5 mm, which can reduce the dead zone of the pump and facilitate the installation of the water outlet joint 20. Specifically, the depth of the portion of the water passage 21 sleeved on the water outlet 13 can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm.

[0061] In one embodiment, a supporting protrusion 15 is provided on one side of the bottom wall of the mounting annular groove 14, one side of the water outlet connector 20 abuts against the supporting protrusion 15, and the other side is spaced from the bottom wall. The pump body 10 generally adopts an integral injection molding process. If the height of the water outlet 13 relative to the bottom wall of the mounting annular groove 14 is less than or equal to 5 mm, the mold used is easy to deform, and the corresponding water outlet 13 is also easy to deform, which is not conducive to the installation of the water outlet check valve 30 and the water outlet connector 20. Therefore, a supporting protrusion 15 is provided on one side of the bottom wall of the mounting annular groove 14, and the supporting protrusion 15 is used to abut the end of the water outlet connector 20 to support the water outlet connector 20. The rest of the bottom wall of the mounting annular groove 14 except the supporting protrusion 15 is spaced from the water outlet connector 20, thereby reducing the possibility of deformation of the water outlet 13 and the possibility that the water outlet connector 20 cannot abut against the mounting annular groove 14 due to air pressure.

[0062] Further, the pump body 10 also includes a water inlet channel 16 connecting the water inlet 12 and the water pump chamber 11, and the water inlet channel 16 partially extends into the mounting ring groove 14 to form a supporting protrusion 15. In this embodiment, the water inlet 12 is connected to the water pump chamber 11 through the water inlet channel 16, and the water outlet 13 is connected to the water pump chamber 11 through the water outlet channel, and the water inlet channel 16 is arranged on the side of the water outlet channel, and is connected to the water pump chamber 11 through part of the water outlet channel, that is, the water inlet channel 16 is connected to the water outlet channel. The water flow channels share part of the flow channels, and the water inlet flow channel 16 is arranged close to the water outlet 13, so that part of the water inlet flow channel 16 protrudes from the bottom of the mounting ring groove 14, thereby forming the supporting protrusion 15. The supporting protrusion 15 can not only provide support for the water outlet joint 20, but also reduce the length of the part of the flow channel shared by the water inlet flow channel 16 and the water outlet flow channel, thereby reducing the total length of the water inlet flow channel 16 and the water outlet flow channel, and then reducing the axial dimension and radial dimension of the pump body 10.

[0063] Refer again Figure 5 and Figure 6In one embodiment, the diameter of the blocking member 31 is larger than the inner diameter of the water outlet 13 and smaller than the outer diameter of the water outlet 13. That is, the blocking member 31 can completely block the water outlet 13 without completely blocking the water flow channel 21, thereby achieving the blocking function of the blocking member 31 without affecting the water flow passing between the blocking member 31 and the water flow channel 21.

[0064] Furthermore, the distance between the outer periphery of the blocking member 31 and the inner wall of the water flow channel 21 of the water outlet joint 20 is less than or equal to 0.5 mm. Specifically, if the distance between the outer periphery of the blocking member 31 and the inner wall of the water flow channel 21 of the water outlet joint 20 is greater than 0.5 mm. The size of the blocking member 31 is too small, which may cause the blocking member 31 to deviate during the movement, resulting in the possibility that the blocking member 31 fails to completely block the water outlet 13. Therefore, the distance between the outer periphery of the blocking member 31 and the inner wall of the water flow channel 21 of the water outlet joint 20 is less than or equal to 0.5 mm, so that the water flow channel 21 further limits the movement of the blocking member 31, thereby preventing the blocking member 31 from deviating during the movement, and reducing the possibility that the blocking member 31 fails to completely block the water outlet 13, resulting in failure of the blocking member 31. Specifically, the distance between the outer periphery of the blocking member 31 and the inner wall of the water flow channel 21 of the water outlet joint 20 may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm.

[0065] Reference Fig. 9 Furthermore, the blocking member 31 includes a main body 312, and a positioning protrusion 313 protruding from the circumference of the main body 312, and a water-passing gap 314 is formed between two adjacent positioning protrusions 313. Specifically, the mounting groove 311 is provided on the main body 312, and the positioning protrusion 313 is protruding from the circumference of the main body 312, and the positioning protrusion 313 has a plurality of positioning protrusions 313, and the plurality of positioning protrusions 313 are arranged at intervals along the circumference of the main body 312, and a water-passing gap 314 is formed between two adjacent positioning protrusions 313, thereby expanding the gap between the blocking member 31 and the water-passing channel 21, so as to facilitate the water flow to pass through the gap between the blocking member 31 and the water-passing channel 21.

[0066] Reference Figures 4 to 6 In another embodiment, the blocking member 31 is coaxially arranged with the water outlet 13 , thereby reducing the possibility that the blocking member 31 and the water outlet 13 are relatively misaligned, resulting in the blocking member 31 failing to completely block the water outlet 13 .

[0067] Reference Figure 5 and Fig.10In order to facilitate the control of the water inlet 12, in one embodiment, a water inlet joint 40 is installed at the water inlet 12, and a second water outlet is provided on the water inlet joint 40, and a water inlet check valve 50 is provided on the water inlet joint 40 to control the second water outlet. That is, in this embodiment, by controlling the opening and closing of the second water outlet, whether the water inlet 12 is blocked is controlled, thereby controlling the water flow into the pump water chamber 11. At this time, the water inlet check valve 50 is provided on the water inlet joint 40, thereby facilitating the installation of the water inlet check valve 50 and the water inlet joint 40. In other embodiments, the water inlet check valve 50 can also be provided between the water inlet joint 40 and the water inlet 12, and the opening and closing of the water inlet 12 are controlled by the water inlet check valve 50, thereby controlling the water flow into the pump water chamber 11.

[0068] Preferably, the water inlet check valve 50 is configured as an umbrella valve or a valve diaphragm, so as to further narrow the flow path of the water flowing into the pump water chamber 11 .

[0069] The present utility model also proposes a water flosser 60, which includes a water pump 100. The specific structure of the water pump 100 refers to the above-mentioned embodiment. Since the water flosser 60 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.

[0070] 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 used 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, wherein the pump body is provided with a water pump cavity, and a water inlet and a water outlet communicating with the water pump cavity, and the water inlet is provided with a water inlet check valve; and A water outlet joint is installed at the water outlet of the pump body, a water flow channel connected to the water outlet is provided in the water outlet joint, a water outlet check valve is provided in the water flow channel, the water outlet check valve includes a blocking member and an elastic member, one end of the elastic member is connected to the water outlet joint, and the other end is connected to the blocking member, and the elastic member enables the blocking member to have a tendency to block the water outlet; The water pump has a water inlet state and a water outlet state that can be switched to each other. In the water inlet state, the water inlet check valve is opened and the blocking member blocks the water outlet; in the water outlet state, the water inlet check valve is closed and the blocking member is separated from the water outlet to allow the liquid in the pump body to flow out.

2. The water pump according to claim 1, characterized in that An installation groove is provided at one end of the blocking member away from the water outlet, a connecting column is provided in the water flow channel of the water outlet joint, one end of the elastic member is sleeved on the connecting column, and the other end of the elastic member is installed in the installation groove.

3. The water pump according to claim 2, characterized in that: The connecting column at least partially extends into the mounting groove.

4. The water pump according to claim 2, characterized in that: The connecting column is connected to the inner wall of the water flow channel through a connecting portion, and a first water outlet is arranged on the connecting portion.

5. The water pump according to claim 4, characterized in that The connecting column, the water flow channel and the water outlet are coaxially arranged.

6. The water pump according to claim 1, characterized in that The pump body is formed with a mounting groove on the outer periphery of the water outlet, the water outlet protrudes from the bottom wall of the mounting groove, the water outlet connector is inserted into the mounting groove, and the water flow channel is sleeved on the water outlet and abuts against the outer peripheral surface of the water outlet.

7. The water pump according to claim 6, characterized in that The depth of the portion of the water passage sleeved on the water outlet is less than or equal to 5 mm.

8. The water pump according to claim 6, characterized in that A supporting protrusion is provided on one side of the bottom wall of the mounting ring groove, one side of the water outlet joint abuts against the supporting protrusion, and the other side is spaced apart from the bottom wall.

9. The water pump according to claim 8, characterized in that The pump body further comprises a water inlet channel communicating with the water inlet and the water pump cavity, and a portion of the water inlet channel extends into the mounting ring groove to form the supporting protrusion.

10. The water pump according to claim 1, characterized in that In the water inlet state, the blocking member abuts against the end surface of the water outlet; in the water outlet state, the blocking member is spaced apart from the water outlet.

11. The water pump according to claim 10, characterized in that The diameter of the blocking member is larger than the inner diameter of the water outlet and smaller than the outer diameter of the water outlet; and / or, The blocking member is coaxially arranged with the water outlet.

12. The water pump according to claim 1, characterized in that The distance between the outer periphery of the blocking member and the inner wall of the water flow channel of the water outlet joint is less than or equal to 0.5 mm.

13. The water pump according to claim 12, characterized in that The blocking member includes a main body and a positioning convex portion protruding from the circumference of the main body, and a water-passing gap is formed between two adjacent positioning convex portions.

14. The water pump according to any one of claims 1 to 13, characterized in that A water inlet joint is installed at the water inlet, and a second water outlet is opened on the water inlet joint. The water inlet one-way valve is arranged on the water inlet joint to control the second water outlet.

15. The water pump according to claim 14, characterized in that The water inlet one-way valve is configured as an umbrella valve or a valve diaphragm.

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

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