Water absorption mechanism and oral irrigator

Abstract

The utility model provides a water absorption mechanism and a water pick. The first water absorption assembly is provided with at least one first water absorption opening close to the bottom of the water tank; the second water suction assembly is provided with at least one second water suction opening close to the top of the water tank. When the water tank is in any posture of an inclined state, an upright state, an inverted state or a transverse state, at least one of the first water absorption assembly and the second water absorption assembly is opened, and water is absorbed through at least one first water absorption opening and / or at least one second water absorption opening. According to the water absorption mechanism, by arranging the absorption assemblies located at the two different positions of the bottom and the top of the water tank correspondingly, water can be absorbed even when the water tank inclines downwards at a large angle or even stands upside down, and the requirement that a user can use the water tank in different postures is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oral cavity cleaning, and particularly relates to a water suction mechanism and an oral irrigator. BACKGROUND

[0002] The common oral irrigator on the market usually has one water suction port at the bottom of the water tank. Some water suction ports are equipped with a gravity ball connected with a soft rubber water suction pipe. The gravity ball and the water suction port can move freely at the bottom of the water tank, but the following problems exist.

[0003] 1. When a user is irrigating, the oral irrigator cannot be kept upright, and sometimes needs to be tilted at a large angle or inverted. The water tank of the oral irrigator is generally installed below or on the side of the oral irrigator, so that the water suction port at the bottom of the water tank is separated from the water surface in the water tank and contacts with air, resulting in failure to suck water. The oral irrigator cannot spray water, and the user cannot clean the toothbrush.

[0004] 2. In order to ensure that the water suction port is not separated from the water surface, the user needs to keep the oral irrigator upright during the irrigation process, which is inconvenient for the user.

[0005] For example, the Chinese utility model patent with the authorization announcement number CN217448078U discloses a low selection type water suction system and a portable oral irrigator. The multi-head water suction structure is arranged at the bottom of the liquid storage container, that is, all the water suction ports are arranged at the bottom of the water tank. During irrigation, the oral irrigator can only be tilted at a small angle. When the oral irrigator is inverted or tilted downward, all the water suction ports are separated from the water surface, the oral irrigator cannot suck water, and the use of the user is affected. UTILITY MODEL CONTENT

[0006] In view of the above problems existing in the prior art, the purpose of the embodiments of the present application is to provide a water suction mechanism capable of sucking water when inverted or tilted at a large angle and an oral irrigator with the water suction mechanism.

[0007] The technical solution adopted by the embodiments of the present application is a water suction mechanism, which comprises:

[0008] a first water suction assembly having at least one first water suction port, the first water suction port being arranged close to the bottom of the water tank;

[0009] a second water suction assembly having at least one second water suction port, the second water suction port being arranged close to the top of the water tank;

[0010] When the water tank is in any posture of an inclined state, an upright state, an inverted state or a transverse state, at least one of the first water suction assembly and the second water suction assembly is opened, and water is sucked through at least one first water suction port and / or at least one second water suction port.

[0011] In an optional embodiment, the first water suction assembly comprises a first multi-way valve and a first water inlet pipe, the first multi-way valve comprises a first port, a second port and a third port, the first port and the second port can be closed or opened, the second port is connected with the second water suction assembly, and the third port is a normally open port and is in communication with a water outlet; the first multi-way valve has a first conduction state in which the first port is in communication with the third port, a second conduction state in which the second port is in communication with the third port, and a third conduction state in which the three ports are in communication with each other.

[0012] The first water inlet pipe is one or more, when the first water inlet pipe is one, the first port is connected with a first end of the first water inlet pipe; when the first water inlet pipe is more than one, the first water suction assembly further comprises a plurality of control valves which are arranged in the same number as the first water inlet pipes and one-to-one correspondingly, the control valve has a first valve port and a second valve port, the first end of each of the first water inlet pipes is connected with the first valve port of one of the control valves respectively, and the second valve ports of the plurality of control valves are connected with the first port after converging; and a second end of the first water inlet pipe forms the first water suction port. The first water suction assembly has simple and reasonable structure and can form one or more first water suction ports, so as to achieve the function that the water tank can suck water in multiple postures.

[0013] In an optional embodiment, the first multi-way valve comprises a first multi-way valve shell and two valve cores, the first multi-way valve shell comprises a main body extending along a first direction and a branch arranged at a side of the main body, the first port is formed at a first end of the main body, the second port is formed at a second end of the main body, and a first valve cavity extending from the first port to the second port is arranged in the main body; the branch is tubular and in communication with the first valve cavity, and a free end of the branch forms the third port; the two valve cores are arranged in the first valve cavity respectively, one of the valve cores is used for closing or opening the first port, and the other valve core is used for closing or opening the second port, so that the first multi-way valve can be switched between the first conduction state, the second conduction state and the third conduction state; wherein, when the water tank is in an upright state or an inverted state, the first direction is a vertical direction. The first multi-way valve can change the conduction state according to different postures of the water tank, so as to realize the function of sucking water from different water suction ports.

[0014] In an optional embodiment, the first valve cavity comprises a thin diameter section at a middle part and a first thick diameter section and a second thick diameter section arranged at opposite sides of the thin diameter section;

[0015] The two valve cores are a first valve core and a second valve core, the first valve core is arranged in the first coarse diameter section, and the second valve core is arranged in the second coarse diameter section; when the water tank is in an upright state, the first coarse diameter section is below the fine diameter section, and the second coarse diameter section is above the fine diameter section;

[0016] When the water tank is in an upwardly inclined state or an upright state, the first valve core is separated from one end of the fine diameter section under the action of gravity, and the second valve core blocks the other end of the fine diameter section under the action of gravity, so that the first port is opened, the second port is closed, and the first multi-way valve is in the first conduction state; when the water tank is in a downwardly inclined state or an inverted state, the first valve core blocks one end of the fine diameter section under the action of gravity, and the second valve core is separated from the other end of the fine diameter section under the action of gravity, so that the first port is closed, the second port is opened, and the first multi-way valve is in the second conduction state; when the water tank is in a horizontal state, the first valve core and the second valve core are both separated from the fine diameter section, so that the first port and the second port are both opened, and the first multi-way valve is in the third conduction state.

[0017] In an optional embodiment, the control valve comprises a valve body and a valve ball, the valve body has a valve cavity therein, and the valve ball is arranged in the valve cavity and can move in the valve cavity under the action of gravity when the water tank changes its posture, so as to close the control valve when its corresponding first water suction port is above the water surface and open the control valve when its corresponding first water suction port is immersed in water. By using the control valve, the switching of different first water suction ports can be conveniently realized.

[0018] In an optional embodiment, the first water suction assembly further comprises a first filter tip and a first connector, the first filter tip is provided with a first filter screen therein, the first filter tip is arranged at the second end of the first water inlet pipe and is in sealed connection with the first water inlet pipe, the first connector is used to seal and connect the first end of the first water inlet pipe with the first end of the main body and communicate them, and the first connector limits the first valve core in the first coarse diameter section; and / or

[0019] The first filter tip is further provided with a first counterweight, and when the water tank changes its posture, the first water inlet pipe can be bent and deformed under the action of the first counterweight, so that the first filter tip is in a low position. By arranging the first filter tip and the first filter screen, the water in the water tank can be filtered to improve the cleanliness; by arranging the first counterweight, the first water inlet pipe can be bent according to the change of the posture of the water tank, so that the first filter tip can be conveniently kept in a low position to suck water.

[0020] In an optional embodiment, the second water suction assembly comprises a second multi-way valve and a second water inlet pipe, the second multi-way valve has a second valve cavity extending in a first direction and at least one third valve cavity extending in a second direction, one end of the at least one third valve cavity is connected with one end of the second valve cavity, the other end of the third valve cavity forms a fourth port capable of being closed or opened, the fourth port is connected with a first end of the second water inlet pipe, a second end of the second water inlet pipe forms the second water suction port, the other end of the second valve cavity forms a fifth port which is always open and is connected with the second port, wherein the second direction is perpendicular to the first direction; and / or

[0021] The cavity diameter of the part of the third valve cavity close to the fourth port is greater than the cavity diameter of other parts to form a stepped portion, a third valve core is arranged in the part of the third valve cavity close to the fourth port, when the water tank changes its posture and drives the second water suction port to be submerged below the water surface, the corresponding third valve core is separated from the stepped portion to open the fourth port, when the water tank changes its posture and drives the second water suction port to be above the water surface, the corresponding third valve core abuts against the stepped portion to close the fourth port. The structure of the second water suction assembly is reasonable and can form at least one second water suction port to achieve the function that the water tank can suck water in multiple postures.

[0022] In an optional embodiment, the second water suction assembly further comprises a second filter tip and a second connector, the second filter tip is provided with a second filter screen, the second filter tip is arranged at the second end of the second water inlet pipe and is in sealed connection with the second water inlet pipe, the second connector is used to seal and connect the first end of the second water inlet pipe with one end of the fourth port and to communicate the first end of the second water inlet pipe with one end of the fourth port, and the second connector limits the third valve core in the part of the third valve cavity close to the fourth port; and / or

[0023] The second filter tip is further provided with a second counterweight, when the water tank changes its posture, the second water inlet pipe can be bent and deformed under the action of the second counterweight to make the second filter tip be in a low position. By arranging the second filter tip and the second filter screen, the water in the water tank can be filtered to improve the cleanliness, and by arranging the second counterweight, the second water inlet pipe can be bent according to the change of the posture of the water tank, so that the second filter tip can be kept in a low position to suck water.

[0024] In an optional embodiment, the first water suction port is a plurality of first water suction ports, and the plurality of first water suction ports are arranged around the axis of the main body of the first multi-way valve shell; the second water suction port is a plurality of second water suction ports, and the plurality of second water suction ports are arranged around the axis of the main body of the first multi-way valve shell. The arrangement is reasonable and facilitates that in any posture of the water tank, there is always a water suction port to suck water.

[0025] The application also provides a water pick, comprising a water tank, a handle and a nozzle, the water pick further comprising the water absorbing mechanism in any of the above embodiments, the first water absorbing component of the water absorbing mechanism extending downward from the first end of the handle to be arranged close to the bottom of the water tank, and the second water absorbing component extending upward from the first end of the handle to be arranged close to the top of the water tank.

[0026] Compared with the prior art, the water absorbing mechanism of the embodiment of the application has the advantages of ingenious design and convenient use, and the water absorbing components arranged at two different positions of the bottom and the top of the water tank can absorb water even when the water tank is inclined downward at a large angle or is inverted, thereby meeting the requirement that the water pick can be used in different postures.

[0027] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory in nature and are not intended to limit the application.

[0028] The summary of various implementations or examples of the technology described in the application is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0029] In the drawings, which are not necessarily drawn to scale, like numerals can describe similar components in different views. The drawings illustrate various embodiments in accordance with the application and, together with the description, serve to explain the application. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like elements. The drawings illustrate various embodiments in accordance with the application and, together with the description, serve to explain the application. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like elements.

[0030] Figure 1 A perspective view of the water pick to which the water absorbing mechanism of the embodiment of the application is applied.

[0031] Figure 2 An exploded view of the water pick to which the water absorbing mechanism of the embodiment of the application is applied.

[0032] Figure 3 A sectional view of the water pick of the embodiment of the application in an upright state. Figure 4 A sectional view of the water pick of the embodiment of the application in an upright state.

[0033] Figure 5 An enlarged view of part A in FIG. Figure 4 An enlarged view of part A in FIG.

[0034] Figure 6 An enlarged view of part B in FIG. Figure 4 An enlarged view of part B in FIG.

[0035] Figure 7 A sectional view of the water pick of the embodiment of the application in an upwardly inclined state. Figure 8 A sectional view of the water pick of the embodiment of the application in an upwardly inclined state.

[0036] A sectional view of the water pick of the embodiment of the application in an upwardly inclined state.Figure 9 and Figure 10 are respectively the cross-sectional view of the oral irrigator of the embodiment of the present application in a downwardly inclined state.

[0037] Figure 11 and Figure 12 are respectively the cross-sectional view of the oral irrigator of the embodiment of the present application in an upside-down state.

[0038] Figures 13 to 16 are respectively the cross-sectional view of the oral irrigator of the embodiment of the present application in a transverse state.

[0039] Figure 17 is the cross-sectional view of the water absorption mechanism of the embodiment of the present application comprising a plurality of first water absorption assemblies and a plurality of second water absorption assemblies.

[0040] Figure 18 is the perspective view of the oral irrigator of the embodiment of the present application.

[0041] Reference signs:

[0042] 1 - first water absorption assembly; 11 - first multi-way valve; 111 - first multi-way valve housing; 112 - first valve cavity; 1121 - thin diameter section; 1122 - first thick diameter section; 1123 - second thick diameter section; 113 - first valve core; 114 - second valve core; 115 - first port; 116 - second port; 117 - third port; 12 - control valve; 121 - valve ball; 13 - first water inlet pipe; 131 - first water absorption opening; 14 - first filter tip; 141 - convex part; 15 - first connector; 16 - first filter screen; 17 - first counterweight; 18 - elbow connector;

[0043] 2 - second water absorption assembly; 21 - second multi-way valve; 211 - second multi-way valve housing; 212 - second valve cavity; 213 - third valve cavity; 214 - fourth port; 215 - fifth port; 216 - third valve core; 217 - short pipe; 22 - second water inlet pipe; 221 - second water absorption opening; 23 - second filter tip; 24 - second connector; 25 - second filter screen; 26 - second counterweight;

[0044] 10 - water tank; 20 - handle; 201 - water inlet; 30 - nozzle. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0046] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms are used herein to distinguish one element from another, but do not necessarily require or imply any actual order or sequence or importance. The terms "comprises", "comprising", "includes", "including" and the like can be used herein to indicate the presence of stated elements or objects, but not preclude the presence or addition of one or more other elements or objects. The terms "connected" and "coupled" as well as the like can be used herein to indicate either a direct connection or an indirect connection or an electrical connection, whether direct or indirect, between two elements. The terms "upper", "lower", "left", "right", and the like are used herein only to represent relative positions, and can change accordingly when the absolute positions of the described objects change.

[0047] In order to keep the following description of the embodiments of the present application clear and concise, detailed description of known functions and known components is omitted.

[0048] The water suction mechanism can be used in a device for spraying water outward to perform flushing or cleaning operation. The water suction port of the water suction mechanism is connected with the water spraying port of the device, so that the water sucked in is sent out through the water spraying port. The device can be an oral irrigator. For the convenience of description, the oral irrigator will be taken as an example in the following description.

[0049] The oral irrigator comprises a water tank 10, a handle 20 and a nozzle 30. The handle 20 is provided with a water inlet 201 at a first end thereof. The water tank 10 is detachably arranged at the first end of the handle 20 and the water inlet 201 is located in the water tank 10. The nozzle 30 is arranged at a second end of the handle 20 and is in communication with the water inlet 201, so that the water entering the water inlet 201 is sprayed out by the nozzle 30 to perform flushing on the teeth. It is first to be noted that when the nozzle 30 is upward and vertical, the water tank 10 (the oral irrigator) is defined as an upright state; when the nozzle 30 is downward and vertical, the water tank 10 (the oral irrigator) is defined as an inverted state; when the nozzle 30 is upward and the water tank 10 (the oral irrigator) is inclined, the water tank 10 (the oral irrigator) is defined as an upward inclined state; when the nozzle 30 is downward and the water tank 10 (the oral irrigator) is inclined, the water tank 10 (the oral irrigator) is defined as a downward inclined state; when the oral irrigator is placed horizontally, the water tank 10 is defined as a horizontal state. In addition, the upper and lower positions of the components mentioned below are the positions based on the upright state of the water tank 10 (the oral irrigator). That is, the water tank 10 is located below the handle 20 and the nozzle 30, and the nozzle 30 is located above.

[0050] As shown in FIG. 1, the water tank 10 is provided with a water inlet 101 at a first end thereof. The water inlet 101 is in communication with the water inlet 201 of the handle 20, so that the water in the water tank 10 can enter the water inlet 201 of the handle 20. The water tank 10 is provided with a water outlet 102 at a second end thereof. The water outlet 102 is in communication with the nozzle 30, so that the water in the water tank 10 can enter the nozzle 30 and be sprayed out by the nozzle 30. Figures 1 to 17As shown, the water suction mechanism includes a first water suction assembly 1 and a second water suction assembly 2. The first water suction assembly 1 has at least one first water suction port 131 arranged near the bottom of the water tank 10. The second water suction assembly 2 has at least one second water suction port 221 arranged near the top of the water tank 10. At least one of the first water suction assembly 1 and the second water suction assembly 2 is opened and sucks water through the at least one first water suction port 131 and / or the at least one second water suction port 221 when the water tank 10 is in any posture of the tilted state, the upright state, the inverted state or the transverse state.

[0051] The water suction mechanism of the embodiments of the present application is ingeniously designed and convenient to use. By arranging the two water suction assemblies at the bottom and the top of the water tank 10 respectively, water can be sucked even when the water tank 10 is tilted downward at a large angle or inverted, thereby meeting the user's demand for using the water tank 10 in different postures.

[0052] As shown in FIGS. Figure 3 , Figure 4 and Figure 17 , the first water suction assembly 1 is arranged downward from the first end of the handle 20 so that the first water suction port 131 is arranged near the bottom of the water tank 10. The second water suction port 221 is arranged upward from the first end of the handle 20 so that the second water suction port 221 is arranged near the top of the water tank 10.

[0053] In some embodiments, the first water suction assembly 1 includes a first multi-way valve 11 and a first water inlet pipe 13. The first multi-way valve 11 includes a first port 115, a second port 116 and a third port 117. The first port 115 and the second port 116 can be closed or opened. The second port 116 is connected to the second water suction assembly 2. The third port 117 is a normally open port and is in communication with the nozzle 30 (water outlet) of the oral irrigator. The first multi-way valve 11 has a first conduction state, a second conduction state and a third conduction state. When the first port 115 is opened and the second port 116 is closed, the first port 115 is in communication with the third port 117 and the communication between the second port 116 and the third port 117 is cut off. At this time, the first multi-way valve 11 is in the first conduction state. When the second port 116 is opened and the first port 115 is closed, the second port 116 is in communication with the third port 117 and the communication between the first port 115 and the third port 117 is cut off. At this time, the first multi-way valve 11 is in the second conduction state. When the first port 115 and the second port 116 are both opened, the three ports are in communication at the same time. At this time, the first multi-way valve 11 is in the third conduction state. Among them, when the first multi-way valve 11 is in the first conduction state, it indicates that the first water suction assembly 1 is opened.

[0054] When the first water suction assembly 1 comprises one first water suction port 131, one first water inlet pipe 13 is provided, and the second end of the first water inlet pipe 13 forms the first water suction port 131, as shown in Figure 3 、 Figure 4 and Figures 7 to 16 ; when the first water suction assembly 1 comprises a plurality of first water suction ports 131, a plurality of first water inlet pipes 13 are provided, and the second end of each first water inlet pipe 13 forms a first water suction port 131, as shown in Figure 17 . Among them, Figure 17 only two first water inlet pipes 13 are shown, of course, more first water inlet pipes 13 can be provided according to actual needs. By providing a plurality of first water suction ports 131, water can be sucked through different first water suction ports 131 when the oral irrigator (water tank 10) is upwardly inclined at any angle.

[0055] Next, the water suction mechanism of the present application will be described by taking the example of only one first water suction port 131.

[0056] The first port 115 is connected with the first end of the first water inlet pipe 13, and the second end of the first water inlet pipe 13 forms the first water suction port 131. As shown in Figure 3 、 Figure 4 、 Figure 7 and Figure 8 , when the oral irrigator (water tank 10) is in an upwardly inclined state or a vertical state, the first port 115 of the first multi-way valve 11 is open, the second port 116 is closed, the first multi-way valve 11 is in a first conduction state, and the first port 115 is in communication with the first water suction port 131. At this time, the water in the water tank 10 can flow through the first water suction port 131, the first water inlet pipe 13, the first multi-way valve 11 and the water inlet port 201 in sequence, and finally enter the nozzle 30. As shown in Figures 9 to 12 , when the oral irrigator (water tank 10) is in a downwardly inclined state or an inverted state, the first port 115 of the first multi-way valve 11 is closed, the second port 116 is open, the first multi-way valve 11 is in a second conduction state, and the second port 116 is in communication with the second water suction assembly 2. The water in the water tank 10 can be sucked in through the second water suction port 221 and flow through the second water suction assembly 2, the first multi-way valve 11 and the water inlet port 201 in sequence, and finally enter the nozzle 30; as shown in Figures 13 to 16As shown, when the oral irrigator (water tank 10) is in a transverse state, the three ports of the first multi-way valve 11 are all open, the first multi-way valve 11 is in a third conduction state, the first port 115 is in communication with the first water suction port 131, the second port 116 is in communication with the second water suction assembly 2, and the water in the water tank 10 can be simultaneously sucked in through the first water suction port 131 and the second water suction port 221 and finally sent into the nozzle 30. The first multi-way valve 11 of the embodiment of the present application can change the conduction state according to different postures of the oral irrigator (water tank 10) and suck water through different water suction ports, so as to realize water suction regardless of the posture of the oral irrigator (water tank 10) and meet the needs of users in different postures of the oral irrigator (water tank 10).

[0057] In some embodiments, as shown in Figure 5 As shown, the first multi-way valve 11 includes a first multi-way valve shell 111 and two valve cores, the first multi-way valve shell 111 includes a main body extending along a first direction and a branch provided on the side of the main body, the first port 115 is formed at the first end of the main body, the second port 116 is formed at the second end of the main body, and the main body is provided with a first valve cavity 112 extending from the first port 115 to the second port 116; the branch is tubular and in communication with the first valve cavity 112, and the free end of the branch forms the third port 117; the two valve cores are respectively arranged in the first valve cavity 112, one of which is used to close or open the first port 115, and the other is used to close or open the second port 116, so that the first multi-way valve 11 can be switched between the first conduction state, the second conduction state and the third conduction state. Wherein, when the oral irrigator (water tank 10) is in an upright state or an inverted state, the first direction is a vertical direction. The first multi-way valve 11 has a simple and reasonable structure, and can be smoothly switched between the three different conduction states, meeting the requirements of water suction in any posture of the oral irrigator (water tank 10).

[0058] It can be understood that the first multi-way valve shell 111 is a straight pipe, the middle part of the pipe cavity is thin, the two ends are thick, and the pipe cavity penetrates through the two ends of the first multi-way valve shell 111 in the axial direction and forms the first port 115 and the second port 116 respectively. The first multi-way valve shell 111 is vertically arranged and will not deform with the change of the posture of the oral irrigator (water tank 10). The branch is formed by extending outwardly along the lateral direction from the peripheral side of the first multi-way valve shell 111, and the first multi-way valve shell 111 and the branch form an inverted T shape.

[0059] In some embodiments, as shown in Figure 5As shown, the first valve cavity 112 includes a thin section 1121 at the middle and first and second thick sections 1122 and 1123 on opposite sides of the thin section 1121. When the oral irrigator (water tank 10) is in an upright state, the first thick section 1122 is below the thin section 1121 and the second thick section 1123 is above the thin section 1121, and when the oral irrigator (water tank 10) is in an inverted state, the first thick section 1122 is above the thin section 1121 and the second thick section 1123 is below the thin section 1121, and the axes of the three are collinear. Two valve cores are first and second valve cores 113 and 114, respectively, with the first valve core 113 arranged in the first thick section 1122 and the second valve core 114 arranged in the second thick section 1123.

[0060] As shown in Figure 3 , Figure 4 , Figure 7 and Figure 8 , when the oral irrigator (water tank 10) is in an upwardly inclined state or an upright state, the first valve core 113 is separated from one end of the thin section 1121 under the action of gravity, and the second valve core 114 blocks the other end of the thin section 1121 under the action of gravity, so that the first port 115 is open and the second port 116 is closed, and the first multi-way valve 11 is in a first conduction state. As shown in Figures 9 to 12 , when the oral irrigator (water tank 10) is in a downwardly inclined state or an inverted state, the first valve core 113 blocks one end of the thin section 1121 under the action of gravity, and the second valve core 114 is separated from the other end of the thin section 1121 under the action of gravity, so that the first port 115 is closed and the second port 116 is open, and the first multi-way valve 11 is in a second conduction state. As shown in Figures 13 to 16 , when the oral irrigator (water tank 10) is in a transverse state, the first and second valve cores 113 and 114 are both separated from the thin section 1121, so that the first and second ports 115 and 116 are both open, and the first multi-way valve 11 is in a third conduction state. By setting the variable diameter structure of the first valve cavity 112 and cooperating with the two valve cores, the oral irrigator (water tank 10) is switched between different conduction states by using the principle of gravity, which is clever in design and convenient to realize.

[0061] As shown in Figure 17As shown, when the second water suction port 221 is multiple, the first water suction assembly 1 further comprises multiple control valves 12 corresponding to the number of the second water suction port 221. The valve cavity of the control valve 12 extends along the second direction, and the two ends of the valve cavity form a first valve port and a second valve port, respectively. The first end of each first water inlet pipe 13 is connected to the first valve port of one of the control valves 12, and a valve ball 121 is arranged in the first valve port. The valve ball 121 can move along the valve cavity under the action of gravity to close or open the first valve port. The second valve ports of the multiple control valves 12 are connected to the first port 115 after converging. The multiple first water inlet pipes 13 are arranged around the axis of the nozzle 30.

[0062] In some embodiments, as shown in Figure 6 As shown, the first water suction assembly 1 further comprises a first filter 14 and a first connector 15. The first filter 14 has a first filter screen 16 therein, and is arranged at the second end of the first water inlet pipe 13 and sealingly connected with the first water inlet pipe 13. The first connector 15 is used to connect the first end of the first water inlet pipe 13 with the first end of the main body, i.e., the first water inlet pipe 13 is connected with the main body through the first connector 15. Specifically, the cavity diameter of the first large-diameter section 1122 of the first multi-way valve 11 is larger than the inner diameter of the first water inlet pipe 13, and the first connector 15 is a variable-diameter tubular structure. The small-diameter end of the first connector 15 is inserted into the first end of the first water inlet pipe 13 and is in interference fit with the first water inlet pipe 13, or sealing is achieved by using a sealing member or glue, etc. The large-diameter end of the first connector 15 is inserted into the first large-diameter section 1122 and is in interference fit with the first large-diameter section 1122, or sealing is achieved by using a sealing member or glue, etc. After the large-diameter end of the first connector 15 is inserted into the first large-diameter section 1122, the first valve core 113 is limited in the first large-diameter section 1122, avoiding the first valve core 113 from being pulled out of the first port 115 of the first multi-way valve 11. By arranging the first filter 14 and the first filter screen 16, the water in the water tank 10 can first pass through the first filter screen 16 for filtration before entering the first water inlet pipe 13, improving the cleanliness. By arranging the first connector 15, the connection of the first water inlet pipe 13 with the first multi-way valve 11 is facilitated, ensuring the structural stability and sealing performance.

[0063] In some embodiments, as shown in Figure 6 As shown, the first filter 14 further comprises a first counterweight 17 for limiting the first filter screen 16 in the first filter 14. By arranging the first counterweight, when the posture of the oral irrigator (water tank 10) changes, the first water inlet pipe 13 can be bent and deformed under the action of the first counterweight 17, so that the first filter 14 is in a low position.

[0064] For example, continuing to combine Figure 6The first filter 14 includes a large-diameter portion and a small-diameter portion connected to the large-diameter portion. The outer diameter of the large-diameter portion is larger than the outer diameter of the small-diameter portion, and the inner diameter of the large-diameter portion is larger than the inner diameter of the small-diameter portion, so that a first step is formed at the communication position of the inner cavities of the large-diameter portion and the small-diameter portion. The first filter screen 16 is arranged in the large-diameter portion and abuts against the first step, and the first weight 17 is arranged in the large-diameter portion and presses the first filter screen 16 against the first step. The small-diameter portion is inserted into the second end of the first water inlet pipe 13, and the large-diameter portion is exposed outside the second end of the first water inlet pipe 13. The small-diameter portion of the first filter 14 and the second end of the first water inlet pipe 13 can be sealed by interference fit, or by a sealing ring or adhesive. In this embodiment, the first filter 14 is always driven to move downward by the first weight 17, and the water in the water tank 10 also moves downward under the action of gravity, so that the oral irrigator (water tank 10) can be in an upwardly inclined state, a horizontal state, and a vertical state, and the first filter 14 (equivalent to the first water suction port 131) can always be immersed in the water in the water tank 10 to suck water.

[0065] It can be understood that the specific structure of the first weight 17 is not limited, as long as it can be fixed in the first filter 14 and does not hinder the water in the water tank 10 from entering the first water inlet pipe 13 through the first filter 14. In addition, the first weight 17 should have a large density to ensure that it has a large weight in a small volume, so as to facilitate the bending deformation of the first water inlet pipe 13 when the oral irrigator (water tank 10) changes its posture, and to move along the flow direction of the water. Figure 2 In the embodiment shown in the figure, the first weight 17 is a flat circular tube, the inner cavity of the large-diameter portion of the first filter 14 is cylindrical, and the outer wall of the first weight 17 is tightly fitted and fixed with the inner cavity wall of the large-diameter portion. In this way, the water in the water tank 10 can enter the first water inlet pipe 13 through the inner cavity of the first weight 17, the first filter screen 16, and the inner cavity of the small-diameter portion in sequence.

[0066] In some embodiments, the second water suction assembly 2 includes a second multi-way valve 21 and a second water inlet pipe 22. The second multi-way valve 21 has a second valve cavity 212 extending in a first direction and at least one third valve cavity 213 extending in a second direction, which is perpendicular to the first direction, as shown in Figure 17 .

[0067] Please continue to read Figure 17When the third valve cavity 213 is multiple, one end of the multiple third valve cavities 213 is connected with one end of the second valve cavity 212 after converging, and the other end of the multiple third valve cavities 213 respectively forms a fourth port 214, each fourth port 214 is connected with the first end of a second water inlet pipe 22 respectively, the second end of the second water inlet pipe 22 forms a second water suction port 221, thus the second water suction assembly 2 has multiple second water suction ports 221. When the third valve cavity 213 is one, one end of the third valve cavity 213 is directly connected with one end of the second valve cavity 212, the other end of the third valve cavity 213 forms the fourth port 214 and is connected with the first end of the second water inlet pipe 22, thus the second water suction assembly 2 has only one second water suction port 221. The other end of the second valve cavity 212 forms a fifth port 215 of the second multi-way valve 21, the fifth port 215 is a normally open port and is connected with the second port 116 of the first multi-way valve 11.

[0068] The fourth port 214 can be closed or opened, when only one fourth port 214 is opened, the second multi-way valve 21 is in a conducting state, at this time the second water suction assembly 2 is opened; when all the fourth ports 214 are closed, the conducting state of the second multi-way valve 21 is interrupted, the second water suction assembly 2 is closed. When the second water suction assembly 2 is opened, that is, the second multi-way valve 21 is conducted, the water in the second water inlet pipe 22 from the second water suction port 221 can pass through the second multi-way valve 21 into the second port 116 of the first multi-way valve 11, and then into the nozzle 30 through the third port 117 of the first multi-way valve 11 and the water inlet port 201; when the second water suction assembly 2 is closed, that is, the conducting of the second multi-way valve 21 is interrupted, the water in the second water inlet pipe 22 from the second water suction port 221 cannot pass through the second multi-way valve 21 into the second port 116 of the first multi-way valve 11, and cannot supply water to the nozzle 30 through the second water suction port 221. The opening and closing of the second water suction assembly 2 is controlled by the on-off of the second multi-way valve 21, and whether to use the second water suction port 221 to suck water is controlled, the way is simple and reasonable, and the realization is convenient.

[0069] In some embodiments, the second water suction assembly 2 comprises a water suction port, and the second multi-way valve 21 comprises a second multi-way valve housing 211 and a third valve core 216. The second multi-way valve housing 211 is fixed to the end face of one end of the handle 20. The second multi-way valve housing 211 forms a second valve cavity 212 and a third valve cavity 213. The third valve cavity 213 has a larger cavity diameter near the fourth port 214 than other parts to form a stepped portion. The third valve core 216 is arranged in the part of the third valve cavity 213 near the fourth port 214. When the oral irrigator (water tank 10) changes its posture and the second water suction port 221 is submerged below the water surface, the third valve core 216 is separated from the stepped portion to open the fourth port 214. When the oral irrigator (water tank 10) changes its posture and the second water suction port 221 is above the water surface, the third valve core 216 abuts against the stepped portion to close the fourth port 214. The on-off state of the second multi-way valve 21 can be controlled by the change of the posture of the oral irrigator (water tank 10), so that the second water suction port 221 can suck water, and when the second water suction port 221 cannot suck water, the second multi-way valve 21 can be cut off in time to avoid affecting the water suction by the first water suction port 131 due to the water suction of air.

[0070] Specifically, when the oral irrigator (water tank 10) is in an upwardly inclined state and the second water suction port 221 is above the water surface, or in a horizontal state and the second water suction port 221 is above the water surface, or in a downwardly inclined state and the second water suction port 221 is above the water surface, the third valve core 216 abuts against the stepped portion to close the fourth port 214. When the oral irrigator (water tank 10) is in an upright state or an inverted state or a horizontal state and the second water suction port 221 is submerged below the water surface, or in a downwardly inclined state and the second water suction port 221 is submerged below the water surface, or in an upwardly inclined state and the second water suction port 221 is submerged below the water surface, the third valve core 216 is separated from the stepped portion to open the fourth port 214. By arranging the variable-diameter valve cavity and cooperating with the third valve core 216, the oral irrigator (water tank 10) can drive the second multi-way valve 21 to switch between the conducting and non-conducting states when changing its posture by using the principle of gravity, so as to achieve the purpose of water suction by the second water suction port 221. This design is ingenious and easy to realize.

[0071] It can be understood that when the second water suction assembly 2 comprises one second water suction port 221, the second multi-way valve shell 211 is a transversely arranged tubular, one end of the axial direction of which is open and forms the fourth port 214, and the other end of the axial direction is closed. The circumferentially downward side of the second multi-way valve shell 211 extends downwardly to form a short tube 217, and the second valve cavity 212 is arranged in the short tube 217, and the end of the short tube 217 forms the fifth port 215. The short tube 217 is inserted into the second end of the main body of the first multi-way valve shell 111 and is sealed with the second end of the main body. The sealing manner can be, for example, interference fit, sealing ring or glue, etc. The short tube 217 simultaneously limits the second valve core 114 in the second large-diameter section 1123, avoiding the second valve core 114 from being pulled out of the second large-diameter section 1123.

[0072] When the second water suction assembly 2 comprises a plurality of second water suction ports 221, a plurality of third valve cavities 213 corresponding to the plurality of second water suction ports 221 are arranged, and the plurality of third valve cavities 213 are arranged around the second valve cavity 212, so that the plurality of second water suction ports 221 are arranged around the axis of the nozzle 30. By arranging the plurality of second water suction ports 221, water can be sucked through different second water suction ports 221 when the oral irrigator (water tank 10) is inclined downward at any angle.

[0073] In some embodiments, as shown in Figure 2 The second water suction assembly 2 further comprises a second filter 23 and a second connector 24. The second filter 23 is provided with a second filter screen 25, and the second filter 23 is arranged at the second end of the second water inlet pipe 22 and is sealingly connected with the second water inlet pipe 22. The second connector 24 is used to connect the second water inlet pipe 22 and the second multi-way valve shell 211, that is, the second water inlet pipe 22 and the fourth port 214 of the second multi-way valve shell 211 are connected through the second connector 24. By arranging the second filter 23 and the second filter screen 25, the water in the water tank 10 can first pass through the second filter screen 25 for filtration before entering the second water inlet pipe 22, thereby improving the cleanliness. By arranging the second connector 24, the connection between the second water inlet pipe 22 and the second multi-way valve 21 is facilitated, and the structural stability and sealing performance are ensured.

[0074] For example, as shown in Figure 2 The second connector 24 is a bend connector, which is approximately L-shaped, one end of which is inserted into the first end of the second water inlet pipe 22 and is interference-fitted or sealed with a sealing member or glue, etc. The other end of the second connector 24 is inserted into the fourth port 214 of the second multi-way valve shell 211 and is interference-fitted or sealed with a sealing member or glue, etc. After the second connector 24 is inserted into the second multi-way valve shell 211, the third valve core 216 is limited in the part of the third valve cavity 213 close to the fourth port 214, avoiding the third valve core 216 from being pulled out of the fourth port 214.

[0075] In some embodiments, the second filter 23 is provided with a second weight 26, which is used to limit the second filter screen 25 in the second filter 23. By providing the second weight, when the oral irrigator (water tank 10) changes its posture, the second water inlet pipe 22 can be bent and deformed under the action of the second weight 26, so that the second filter 23 is in a low position.

[0076] The structure of the first filter 14 is the same as that of the second filter 23, the structure of the second weight 26 is the same as that of the first weight 17, and the two adopt the same matching mode, so the matching mode of the second weight 26 and the second filter 23 will not be described here.

[0077] In some embodiments, as shown in Figure 2 The water suction mechanism further includes a bend joint 18, which is approximately L-shaped. One end of the bend joint 18 is sealingly connected to the free end of the branch, and the other end of the bend joint 18 is sealingly connected to a water inlet 201 on the handle 20 of the oral irrigator (water tank 10). In this way, the bend joint 18 realizes the connection towards both the perpendicular branch and the water inlet 201.

[0078] It should be noted that the first valve core 113, the second valve core 114 and the third valve core 216 can adopt the same structure, for example, all of them adopt steel balls. The steel balls have a relatively large density and can move under the action of gravity to follow the change of the posture of the oral irrigator (water tank 10) to realize the opening and closing of the valve. In addition, the surface of the steel ball can be designed to be relatively smooth to achieve a good sealing effect.

[0079] The working principle of the water suction mechanism when the oral irrigator (water tank 10) is in different postures will be described below in conjunction with the drawings:

[0080] As shown in Figure 3 and Figure 4As shown, when the oral irrigator (water tank 10) is in an upright state, the first water inlet pipe 13 is in a vertical state under the action of the first counterweight, and the first filter tip 14 is close to the bottom wall of the water tank 10. The bottom of the first filter tip 14 is provided with a protrusion 141 to form a gap between the first filter tip 14 and the bottom wall, and the water in the water tank 10 enters the first filter tip 14 through the gap. At this time, the first valve core 113 is separated from the lower end of the thin diameter section 1121 under the action of gravity, so that the first port 115 is opened, and the second valve core 114 is blocked at the upper end of the thin diameter section 1121 under the action of gravity, so that the second port 116 is closed, and the first multi-way valve 11 is in a first conduction state. When the first water suction assembly 1 has only one first water suction port 131, the control valve 12 is not provided, and the water in the water tank 10 can be directly sucked through the first filter tip 14 (equivalent to the first water suction port 131). The sucked water successively passes through the first filter screen 16, the first filter tip 14, the first water inlet pipe 13, the first connector 15, the first port 115, the first multi-way valve 11, the third port 117, the elbow connector 18 and the water inlet port 201, and finally enters the nozzle 30 (see Figure 3 and Figure 4 the arrow direction), realizing the oral irrigation operation. When the first water suction assembly 1 is provided with a plurality of water suction ports, the valve cavity of the control valve 12 is transversely arranged, the valve ball 121 does not close the valve port of the control valve 12, the control valve 12 is in an open state, and the plurality of first water suction nozzles all suck water.

[0081] As shown in Figure 7 and Figure 8 , when the oral irrigator (water tank 10) is in an upwardly inclined state, the first water inlet pipe 13 is bent towards the side wall located on the lower side under the action of the first counterweight, and the first filter tip 14 is separated from the bottom wall of the water tank 10 and immersed in the water in the water tank 10. At this time, the first valve core 113 is separated from the lower end of the thin diameter section 1121 under the action of gravity, so that the first port 115 is opened, and the second valve core 114 is blocked at the upper end of the thin diameter section 1121 under the action of gravity, so that the second port 116 is closed, and the first multi-way valve 11 is in a first conduction state. When there are a plurality of first water suction ports 131, the control valve 12 corresponding to the first water suction port 131 immersed in the water is opened, and the control valve 12 corresponding to the first water suction port 131 located above the water surface is closed. The water in the water tank 10 can be sucked through the first filter tip 14 (equivalent to the first water suction port 131), and the water successively passes through the first filter screen 16, the first filter tip 14, the first water inlet pipe 13, the first connector 15, the first port 115, the first multi-way valve 11, the third port 117, the elbow connector 18 and the water inlet port 201, and finally enters the nozzle 30, realizing the oral irrigation operation.

[0082] As shown in Figure 9 and Figure 10As shown, when the oral irrigator (water tank 10) is in a downwardly inclined state, the first water inlet pipe 13 is bent towards the direction of one of the side walls under the action of the first counterweight, and the first filter tip 14 is separated from the bottom wall of the water tank 10. At the same time, the first valve core 113 blocks the lower end of the thin section 1121 under the action of gravity, and the first port 115 is closed, and the second valve core 114 is separated from the upper end of the thin section 1121 under the action of gravity, and the second port 116 is opened, and the first multi-way valve 11 is in a second conduction state. The second water inlet port 221 submerged in water corresponds to the third valve core 216 opening the fourth port 214 corresponding thereto, and the water in the water tank 10 can be sequentially sent into the nozzle 30 through the second filter screen 25, the second filter tip 23, the second water inlet pipe 22, the second connector 24, the fourth port 214, the second multi-way valve 21, the fifth port 215, the second port 116, the first multi-way valve 11, the third port 117, the elbow joint 18 and the water inlet port 201.

[0083] As shown in Figure 11 and Figure 12 As shown, when the oral irrigator (water tank 10) is in a downwardly inclined state, the first water inlet pipe 13 is bent towards the direction of one of the side walls under the action of the first counterweight, and the first filter tip 14 is separated from the bottom wall of the water tank 10. At the same time, the first valve core 113 blocks the lower end of the thin section 1121 under the action of gravity, and the first port 115 is closed, and the second valve core 114 is separated from the upper end of the thin section 1121 under the action of gravity, and the second port 116 is opened, and the first multi-way valve 11 is in a second conduction state. The second multi-way valve 21 is opened because the third valve chamber 213 is transversely arranged, and the third valve core 216 does not remain pressed against the stepped portion. The water in the water tank 10 can be sequentially sent into the nozzle 30 through the second filter screen 25, the second filter tip 23, the second water inlet pipe 22, the second connector 24, the fourth port 214, the second multi-way valve 21, the fifth port 215, the second port 116, the first multi-way valve 11, the third port 117, the elbow joint 18 and the water inlet port 201.

[0084] As shown in Figures 13 to 16As shown, when the oral irrigator (water tank 10) is in a transverse state, the first water inlet pipe 13 is bent towards the lower side wall under the action of the first counterweight, and the first filter 14 is separated from the bottom wall of the water tank 10 and immersed in the water in the water tank 10. When the oral irrigator (water tank 10) is transverse, the first valve cavity 112 of the first multi-way valve 11 is equivalent to transverse extension, and the first valve core 113 and the second valve core 114 cannot maintain the state of pressing against both ends of the thin diameter section 1121, so the first port 115 and the second port 116 are both open, and the first multi-way valve 11 is in the third conduction state. The water in the water tank 10 can be sucked in through the first filter 14 (equivalent to the first water suction port 131), and then pass through the first filter screen 16, the first filter 14, the first water inlet pipe 13, the first connector 15, the first port 115, the first multi-way valve 11, the third port 117, the elbow 18 and the water inlet port 201, and finally into the nozzle 30, realizing the operation of rinsing the teeth. At the same time, the third valve core 216 corresponding to the second water suction port 221 immersed in the water is opened, and water is sucked in through the second water suction port 221. It can be understood that when multiple first water suction ports 131 and multiple second water suction ports 221 are provided, the control valve 12 or the port corresponding to the water suction port immersed in the water is opened, and the control valve 12 or the port corresponding to the water suction port above the water surface is closed, so as to ensure the normal water suction operation of the water suction mechanism.

[0085] As shown in the Figure 18 The oral irrigator provided by the embodiment of the present application also includes a water tank 10, a handle 20, a nozzle 30 and the water suction mechanism in any of the above embodiments. The first end of the handle 20 is provided with a water inlet port 201, and the nozzle 30 is arranged at the second end of the handle 20. A water pump is arranged in the handle 20, the water inlet end of the water pump is connected with the water inlet port 201, and the water outlet end of the water pump is connected with the nozzle 30. The water pump is used to provide power for the water sucked in by the first water suction port 131 and the second water suction port 221 respectively, so that the water can smoothly flow into the nozzle 30. The water suction mechanism is fixed to the first end of the handle 20, the tank opening of the water tank 10 is detachably connected with the first end of the handle 20, and when the tank opening of the water tank 10 is connected with the first end of the handle 20, the water suction mechanism is located in the water tank 10.

[0086] The oral irrigator of the embodiment of the present application can suck water when used at multiple inclination angles, thereby solving the problem of inconvenient use of the oral irrigator.

[0087] The above description is intended to be illustrative rather than restrictive. A person of ordinary skill in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more solutions thereof) can be used in combination with each other, and the embodiments can be combined with each other in various combinations or arrangements.

Claims

1. A water absorbing mechanism, characterized by, The water suction mechanism comprises: A first water suction assembly (1) having at least one first water suction port (131) arranged near the bottom of a water tank (10); A second water suction assembly (2) having at least one second water suction port (221) arranged near the top of the water tank (10); Wherein, when the water tank (10) is in any posture of an inclined state, an upright state, an inverted state or a transverse state, at least one of the first water suction assembly (1) and the second water suction assembly (2) is opened, and water is sucked through at least one first water suction port (131) and / or at least one second water suction port (221).

2. The water absorbing mechanism according to claim 1, characterized by, The first water suction assembly (1) comprises a first multi-way valve (11) and a first water inlet pipe (13), the first multi-way valve (11) comprises a first port (115), a second port (116) and a third port (117), the first port (115) and the second port (116) can be closed or opened, the second port (116) is connected with the second water suction assembly (2), the third port (117) is a normally open port and is in communication with a water spraying port; the first multi-way valve (11) has a first conduction state in which the first port (115) is in communication with the third port (117), a second conduction state in which the second port (116) is in communication with the third port (117), and a third conduction state in which the three ports are in communication at the same time; The first water inlet pipe (13) is one or more, when the first water inlet pipe (13) is one, the first port (115) is connected with the first end of the first water inlet pipe (13); when the first water inlet pipe (13) is more than one, the first water suction assembly (1) further comprises a plurality of control valves (12) which are arranged in the same number as the first water inlet pipe (13) and one-to-one corresponding, the control valve (12) has a first valve port and a second valve port, the first end of each first water inlet pipe (13) is respectively connected with the first valve port of one of the control valves (12), and the second valve ports of a plurality of control valves (12) are connected with the first port (115) after converging; the second end of the first water inlet pipe (13) forms the first water suction port (131).

3. The water absorbing mechanism according to claim 2, characterized by The first multi-way valve (11) comprises a first multi-way valve shell (111) and two valve cores, the first multi-way valve shell (111) comprises a main body extending in a first direction and a branch arranged at the side of the main body, the first port (115) is formed at the first end of the main body, the second port (116) is formed at the second end of the main body, and the first valve cavity (112) extending from the first port (115) to the second port (116) is arranged in the main body; the branch is tubular and communicates with the first valve cavity (112), and the free end of the branch forms the third port (117); the two valve cores are respectively arranged in the first valve cavity (112), one of which is used to close or open the first port (115), and the other is used to close or open the second port (116), so that the first multi-way valve (11) can be switched between the first conduction state, the second conduction state and the third conduction state; wherein the first direction is a vertical direction when the water tank (10) is in an upright state or an inverted state.

4. The water absorbing mechanism according to claim 3, characterized by The first valve cavity (112) comprises a thin diameter section (1121) at the middle part and first and second thick diameter sections (1122) and (1123) on the opposite sides of the thin diameter section (1121); The two valve cores are respectively a first valve core (113) and a second valve core (114), the first valve core (113) is arranged in the first thick diameter section (1122), and the second valve core (114) is arranged in the second thick diameter section (1123); when the water tank (10) is in an upright state, the first thick diameter section (1122) is below the thin diameter section (1121), and the second thick diameter section (1123) is above the thin diameter section (1121); When the water tank (10) is in an upwardly inclined state or an upright state, the first valve core (113) is separated from one end of the thin diameter section (1121) under the action of gravity, and the second valve core (114) blocks the other end of the thin diameter section (1121) under the action of gravity, so that the first port (115) is opened, the second port (116) is closed, and the first multi-way valve (11) is in the first conduction state; when the water tank (10) is in a downwardly inclined state or an inverted state, the first valve core (113) blocks one end of the thin diameter section (1121) under the action of gravity, and the second valve core (114) is separated from the other end of the thin diameter section (1121) under the action of gravity, so that the first port (115) is closed, the second port (116) is opened, and the first multi-way valve (11) is in the second conduction state; when the water tank (10) is in a horizontal state, the first valve core (113) and the second valve core (114) are separated from the thin diameter section (1121), so that the first port (115) and the second port (116) are both opened, and the first multi-way valve (11) is in the third conduction state.

5. The water absorbing mechanism of claim 2, wherein, The control valve (12) comprises a valve body with a valve cavity and a valve ball (121) arranged in the valve cavity and capable of moving in the valve cavity under the action of gravity when the water tank (10) changes its posture, so as to close the control valve (12) when the corresponding first water inlet (131) is above the water surface and open the control valve (12) when the corresponding first water inlet (131) is submerged in water.

6. The water absorbing mechanism of claim 4, wherein, The first water suction assembly (1) further comprises a first filter tip (14) and a first connector (15), the first filter tip (14) is provided with a first filter screen (16), the first filter tip (14) is arranged at the second end of the first water inlet pipe (13) and is in sealed connection with the first water inlet pipe (13); the first connector (15) is used for sealingly connecting and communicating the first end of the first water inlet pipe (13) with the first end of the main body, and the first connector (15) limits the first valve core (113) in the first large-diameter section (1122); and / or The first filter tip (14) is further provided with a first counterweight (17), and when the water tank (10) changes its posture, the first water inlet pipe (13) can be bent and deformed under the action of the first counterweight (17), so that the first filter tip (14) is in a low position.

7. The water absorbing mechanism of claim 3, wherein The second water suction assembly (2) comprises a second multi-way valve (21) and a second water inlet pipe (22), the second multi-way valve (21) has a second valve cavity (212) extending in a first direction and at least one third valve cavity (213) extending in a second direction, one end of the at least one third valve cavity (213) is connected with one end of the second valve cavity (212), the other end of the third valve cavity (213) forms a fourth port (214) capable of being closed or opened, the fourth port (214) is connected with the first end of the second water inlet pipe (22), the second end of the second water inlet pipe (22) forms the second water inlet (221); the other end of the second valve cavity (212) forms a fifth port (215) always open, the fifth port (215) is connected with the second port (116), wherein the second direction is perpendicular to the first direction; and / or The cavity diameter of the third valve cavity (213) near the fourth port (214) is larger than that of other parts to form a stepped portion; the third valve cavity (213) near the fourth port (214) is provided with a third valve core (216); when the water tank (10) changes its posture and drives the second water inlet (221) to be submerged below the water surface, the corresponding third valve core (216) is separated from the stepped portion to open the fourth port (214); when the water tank (10) changes its posture and drives the second water inlet (221) to be above the water surface, the corresponding third valve core (216) abuts against the stepped portion to close the fourth port (214).

8. The water absorbing mechanism according to claim 7, characterized by The second water suction assembly (2) further comprises a second filter tip (23) and a second joint (24), the second filter tip (23) is provided with a second filter screen (25) therein, the second filter tip (23) is arranged at the second end of the second water inlet pipe (22) and is in sealing connection with the second water inlet pipe (22); the second joint (24) is used for sealingly connecting and communicating the first end of the second water inlet pipe (22) with one end of the fourth port (214), and the second joint (24) limits the third valve core (216) in the part of the third valve cavity (213) close to the fourth port (214); and / or The second filter tip (23) is further provided with a second counterweight (26), when the water tank (10) changes its posture, the second water inlet pipe (22) can be bent and deformed under the action of the second counterweight (26), so that the second filter tip (23) is in a low position.

9. The water absorbing mechanism of claim 3, wherein, The first water suction port (131) is a plurality of, and a plurality of first water suction ports (131) are arranged around the axis of the main body of the first multi-way valve shell (111); the second water suction port (221) is a plurality of, and a plurality of second water suction ports (221) are arranged around the axis of the main body of the first multi-way valve shell (111).

10. An oral irrigator comprising a water tank (10), a handle (20) and a nozzle (30), characterized in that The oral irrigator further comprises the water suction mechanism according to any one of claims 1 to 9, the first water suction assembly (1) of the water suction mechanism is arranged by the first end of the handle (20) extending downward to be close to the bottom of the water tank (10), and the second water suction assembly (2) is arranged by the first end of the handle (20) extending upward to be close to the top of the water tank (10).

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