Medium pump and oral care device

Abstract

The utility model discloses a medium pump and oral care equipment, a pump body is provided with a first cavity, a second cavity and a communicating channel communicating the first cavity with the second cavity, a piston assembly is arranged in the first cavity, and a piston part of the piston assembly is movably arranged in the first cavity and is suitable for pumping a medium in the first cavity into the second cavity; the drainage assembly is arranged in the second cavity, and a valve element of the drainage assembly is movably arranged in the second cavity and suitable for closing a communication channel of the first cavity and the second cavity. The piston part comprises a piston body and a connecting rod, the connecting rod penetrates through the communicating channel so as to at least partially extend into the second cavity, the motion stroke of the connecting rod and the motion stroke of the valve element at least partially coincide, and the connecting rod and the valve element are consistent in stroke end point and suitable for pushing against the valve element so as to delay closing of the communicating channel. And at least part of the medium in the second cavity flows back to the first cavity. Therefore, the use experience of the oral care equipment can be improved, and the portability requirement and the cleaning effect requirement of the oral care equipment are both considered.

Description

Technical Field

[0001] This application relates to the field of oral care, and in particular to a medium pump and an oral care device. Background Art

[0002] In the related art, the application scenarios of oral care devices are becoming more and more extensive, and the portable use requirements of consumers need to be met.

[0003] However, in order to achieve the purpose of portability, the capacity of the medium box of the oral care device needs to be set small. A small capacity of the medium box is difficult to meet the requirement of multiple usage times for continuous operation, and due to the small amount of medium, the oral cleaning effect will also decline. Summary of the Utility Model

[0004] This application aims to solve at least one of the technical problems existing in the prior art. To this end, an object of this application is to provide a medium pump, which has a better effect of saving medium, and can meet the oral cleaning requirements while meeting the portable use requirements of oral care devices, ensuring the oral cleaning effect.

[0005] This application further provides an oral care device using the above medium pump.

[0006] In a first aspect, this application provides a medium pump for an oral care device, including: a pump body, a piston assembly, and a drainage assembly. The pump body has a first chamber, a second chamber, and a communication channel connecting the first chamber and the second chamber. The piston assembly is disposed in the first chamber, and the piston portion of the piston assembly is movably disposed in the first chamber. The drainage assembly is disposed in the second chamber, and the valve core of the drainage assembly is movably disposed in the second chamber and is adapted to close the communication channel between the first chamber and the second chamber. Wherein the piston portion includes: a piston body and a connecting rod. The connecting rod passes through the communication channel and at least partially extends into the second chamber, and the movement stroke of the connecting rod at least partially coincides with the movement stroke of the valve core.

[0007] According to the medium pump of the embodiment of this application, the effect of saving medium is better, and further, the use experience of the oral care device can be improved, taking into account the portability requirements and the cleaning effect requirements of the oral care device.

[0008] According to some embodiments of the present application, the piston part is adapted to switch between a first position and a third position, and in the third position, the piston part is adapted to close the communication channel on one side of the first chamber; the valve core is adapted to switch between a second position and a third position, and in the second position, the valve core is adapted to close the communication channel on one side of the second chamber, and the movement stroke between the first position and the third position is greater than the movement stroke between the second position and the third position, so that when the connecting rod moves to the second position, the connecting rod is adapted to push the valve core to switch from the second position to the third position, and during the process of the piston part resetting to the first position, the valve core is pushed against to delay the closing of the communication channel.

[0009] According to some embodiments of the present application, the drainage assembly has a medium outlet communicating with the second chamber, the valve core includes: a first sealing end, the drainage assembly further includes an elastic member, the first sealing end is adapted to close the medium outlet, and the elastic member pushes against the first sealing end to drive the valve core to move in the second chamber.

[0010] According to some embodiments of the present application, the valve core further includes: a mating section, the mating section is connected to the first sealing end, and the elastic member is sleeved on the mating section.

[0011] According to some embodiments of the present application, the valve core further includes: a second sealing end, the second sealing end is opposite to the first sealing end in the movement direction of the valve core, the second sealing end is adapted to close the communication channel on one side of the second chamber, and the elastic member is adapted to drive the second sealing end to close the communication channel.

[0012] According to some embodiments of the present application, the drainage assembly includes a valve seat, the valve seat is connected to the pump body and defines the medium outlet, and the first sealing end cooperates with the valve seat to close the medium outlet.

[0013] According to some embodiments of the present application, the piston assembly includes: a cylinder block, the cylinder block is disposed in the first chamber and defines a pump chamber, the piston body is disposed in the pump chamber to switch between the first position and the third position, and the connecting rod penetrates through the pump chamber to at least partially extend into the second chamber.

[0014] According to some embodiments of the present application, the medium pump further includes: a driving member, and a crank of the driving member is hermetically connected to the piston body.

[0015] According to some embodiments of the present application, an installation cavity is provided on the piston body, an end of the crank is installed in the installation cavity, and a water bag structure for sealing cooperation with the first chamber is provided at the end of the crank.

[0016] According to some embodiments of the present application, the piston body includes: a piston housing and a seal. The piston housing is connected to the connecting rod. A connecting portion is provided at one end of the piston housing connected to the connecting rod. The connecting portion is connected to the seal, and the seal is in sealing cooperation with the cylinder block.

[0017] According to some embodiments of the present application, a sealing portion is provided at one end of the seal away from the crank. The sealing portion extends radially outward and is in interference fit with the inner wall of the cylinder block.

[0018] According to some embodiments of the present application, the medium pump further includes: a water inlet assembly. The water inlet assembly is connected to the pump body, and the water inlet assembly is in communication with the communication channel and is adapted to supply the medium to the first chamber through the communication channel.

[0019] According to some embodiments of the present application, the water inlet assembly includes: a check valve for water inlet. The check valve for water inlet is located upstream of the communication channel and is adapted to control the selective communication between the water inlet assembly and the communication channel.

[0020] According to some embodiments of the present application, the drainage assembly is arranged axially of the pump body, the water inlet assembly is arranged radially of the pump body, and the inlet pipeline of the water inlet assembly extends axially along the pump body.

[0021] In a second aspect, the present application proposes an oral care device, including: the medium pump described in the above embodiments.

[0022] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. Description of the Drawings

[0023] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0024] Figure 1 is a schematic diagram of the medium pump and the crank according to an embodiment of the present application;

[0025] Figure 2 is a cross-sectional schematic diagram of the medium pump according to an embodiment of the present application;

[0026] Figure 3 is an exploded schematic diagram of the medium pump according to an embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the valve core according to an embodiment of the present application;

[0028] Figure 5Schematic diagram of the periodic change of the pressure in the second chamber of the media pump according to an embodiment of the present application;

[0029] Figure 6 Schematic diagram of the movement strokes of the piston part and the valve core according to an embodiment of the present application;

[0030] Figure 7 Schematic diagram of a piston part according to an embodiment of the present application;

[0031] Figure 8 Cross-sectional schematic diagram of the piston part according to an embodiment of the present application.

[0032] Reference numerals:

[0033] Media pump 100, crank 200,

[0034] Pump body 10, first chamber 11, second chamber 12, communication channel 13,

[0035] Piston assembly 20, piston part 21, piston body 211, installation cavity 2111, piston shell 2112, seal 2113, connecting part 2114, sealing part 2115, connecting rod 212, cylinder block 22, pump chamber 221,

[0036] Drainage assembly 30, valve core 31, mating section 311, first sealing end 312, second sealing end 313, valve seat 32, media outlet 321, elastic member 33,

[0037] Water inlet assembly 40, water inlet check valve 41, water bag structure 50. Detailed implementation manners

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the description of the present application in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the description and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0040] Reference to "embodiment" in this application means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0041] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", "attached" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The term "and / or" in this application is merely a correlative relationship describing the related objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the related objects before and after.

[0043] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of simplicity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device are only for illustrative purposes and should not constitute any limitation to this application.

[0044] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0045] In the description of this application, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0046] In the description of the present application, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the plane height of the first feature is higher than that of the second feature.

[0047] In the present application, "a plurality of" refers to two or more (including two).

[0048] In the related art, the application scenarios of oral care devices are becoming more and more extensive, and it is necessary to meet the usage requirements of consumers to access and carry them at any time. Therefore, oral care devices need to be set to be relatively small and portable.

[0049] However, the volume of the oral care device is directly related to the size of the medium box. The larger the medium box, the larger the volume of the oral care device and the lower the portability. The smaller the medium box, the smaller the volume of the oral care device and the higher the portability. At the same time, on the premise that the amount of medium sprayed each time is the same, the larger the medium box, the more times the oral care device can be rinsed, and the smaller the medium box, the fewer times the oral care device can be rinsed. And fewer rinsing times are difficult to ensure the oral cleaning effect.

[0050] That is to say, the portability requirement of the flusher leads to a relatively small volume of the medium box, and the relatively few rinsing times of the oral care device make it difficult to ensure the oral cleaning effect, that is, it is difficult to balance the portability requirement and the oral cleaning effect.

[0051] At the same time, it can be understood that based on the reduction of the volume of the medium box, the amount of medium in the medium box decreases, which will also cause the oral care device to need to add medium frequently, and will also reduce the usage convenience of the oral care device.

[0052] Based on this, the present application proposes a medium pump. The medium-saving performance of the medium pump is better. On the premise of using a small medium box to meet the portability requirements, the oral care device is more medium-saving, and the rinsing times of the oral care device can also be guaranteed to improve the cleaning effect of the oral care device. At the same time, the number of times of injecting medium into the medium box can be reduced, the usage convenience can be improved, and the usage experience can be improved.

[0053] Next, refer to Figures 1-5 Describe the medium pump 100 and the oral care device according to the embodiments of the present application.

[0054] As Figure 1 、 Figure 2 and Figure 3 shown, in the first aspect, the present application proposes a medium pump 100. The medium pump 100 can be applied to an oral care device, including: a pump body 10, a piston assembly 20, and a drainage assembly 30.

[0055] Among them, the pump body 10 has a first chamber 11, a second chamber 12, and a communication channel 13 communicating the first chamber 11 and the second chamber 12. The piston assembly 20 is disposed in the first chamber 11, and the piston portion 21 of the piston assembly 20 is movably disposed in the first chamber 11 and is adapted to pump the medium in the first chamber 11 into the second chamber 12. The drainage assembly 30 is disposed in the second chamber 12, and the valve core 31 of the drainage assembly 30 is movably disposed in the second chamber 12 and is adapted to close the communication channel 13 between the first chamber 11 and the second chamber 12.

[0056] It should be noted that the medium in the embodiments of the present application can be water or a mixed medium of water and other solvents, such as water mixed with a cleaning agent.

[0057] Specifically, the first chamber 11 and the second chamber 12 are communicated through the communication channel 13. During the operation of the medium pump 100, the piston assembly 20 moves in the first chamber 11 and is adapted to squeeze the medium in the first chamber 11, so that the medium in the first chamber 11 can be pumped into the second chamber 12 under the action of the piston assembly 20. The drainage assembly 30 is disposed in the second chamber 12, and the medium pumped into the second chamber 12 by the piston assembly 20 can be discharged through the drainage assembly 30. The valve core 31 of the drainage assembly 30 can move in the second chamber 12. The valve core 31 can close the communication channel 13 on one side of the second chamber 12 and open the communication channel 13 as the piston assembly 20 moves, so as to give a certain pressure to the medium and realize the supply of the pressurized medium through the drainage assembly 30.

[0058] It can be understood that in the prior art, after the piston assembly 20 pumps the medium in the first chamber 11 of the medium pump 100 into the second chamber 12, the piston assembly 20 will further reset. After resetting, the medium can be injected into the first chamber 11 again, and the periodic supply of the pressurized medium is realized through the reciprocating movement of the piston assembly 20. During the reset process of the piston assembly 20, the valve core 31 closes synchronously, resulting in a part of the medium remaining in the second chamber 12. The remaining medium will not only affect the jet energy of the supply of the pressurized medium in the next cycle, but also cause medium waste in the medium pump 100.

[0059] Based on this, in the present application, the piston portion 21 includes: a piston body 211 and a connecting rod 212. The connecting rod 212 passes through the communication channel 13 and at least partially extends into the second chamber 12, and the movement stroke of the connecting rod 212 at least partially coincides with the movement stroke of the valve core 31.

[0060] In some embodiments, the stroke ends of the connecting rod 212 and the valve core 31 can be the same and are adapted to push against the valve core 31 to delay closing the communication channel 13 and enable at least part of the medium in the second chamber 12 to flow back to the first chamber 11.

[0061] Specifically, the movement stroke of the piston portion 21 isFigure 6 as shown by the line segment AC, and the movement of the valve core 31 forms Figure 6 as shown by the line segment BC. Define point C as the end point of the stroke of the valve core 31 and the connecting rod 212, point B as the starting point of the stroke of the valve core 31, and point A as the starting point of the stroke of the connecting rod 212. When the connecting rod 212 is at point A, the first chamber 11 is in the open state and has the largest volume. When the connecting rod 212 is at point C, the medium in the first chamber 11 is completely pumped out. When the valve core 31 is at point B, the communication channel 13 is closed. When the valve core 31 is at point C, the communication channel 13 is open, and all the medium in the first chamber 11 is pumped into the second chamber 12. The part of the connecting rod 212 extending into the second chamber 12 can push against the valve core 31 to realize the linkage between the piston part 21 and the valve core 31.

[0062] Furthermore, during the process of the connecting rod 212 moving from point A to point B, the connecting rod 212 gradually moves to push against the valve core 31. Under the action of the pressure of the medium in the communication channel 13 and the thrust of the connecting rod 212, the valve core 31 moves from point B to point C and opens the communication channel 13, enabling the medium to enter the second chamber 12. The valve core 31 gradually moves from point B to point C. During the process of the connecting rod 212 moving from point C to point B, the valve core 31 synchronously resets from point C to point B, and the stroke of the valve core 31 is smaller than the stroke of the connecting rod 212, so that the valve core 31 can be delayed to move to point B under the pushing and limiting action of the connecting rod 212, so as to delay the closing of the communication channel 13.

[0063] In other words, the movement stroke of the connecting rod 212 from point A to point C can be divided into a first stage and a second stage. In the first stage, the connecting rod 212 moves from point A to point B. In the second stage, the connecting rod 212 moves from point B to point C. The movement stroke of the connecting rod 212 from point C to point A is divided into a third stage and a fourth stage. In the third stage, the connecting rod 212 moves from point C to point B. In the fourth stage, the connecting rod 212 moves from point B to point A. In the first stage, the connecting rod 212 does not push the valve core 31. In the second stage, after the connecting rod 212 contacts the valve core 31, it begins to push the valve core 31 and makes the valve core 31 move from point B to point C. In the third stage, the valve core 31 synchronously moves from point C to point B. In the fourth stage, the connecting rod 212 no longer pushes the valve core 31 and moves alone. During the process of moving from the third stage to the fourth stage, the connecting rod 212 pushes the valve core 31, resulting in the delayed closing of the valve core 31. When the connecting rod 212 moves to the fourth stage, the valve core 31 closes.

[0064] Furthermore, referring to Figure 5 as shown Figure 5The water pressure change in the first chamber 11 is represented by P, and the movement stroke of the connecting rod 212 is represented by T. When the connecting rod 212 is at point C, the water pressure in the first chamber 11 is relatively small (it can be 0), and the first chamber 11 is in the minimum state. As the connecting rod 212 moves from point C to point B, the medium is injected into the first chamber 11, and the water pressure first rises and then drops to a relatively small value (it can be 0). At this time, under the action of the connecting rod 212, the valve core 31 closes with a delay, and the connecting rod 212 and the piston body 211 continue to move towards point A, causing a negative pressure in the first chamber 11. The remaining medium in the second chamber 12 can flow back to the first chamber 11 under the action of the negative pressure, that is, at least part of the medium in the second chamber 12 is made to flow back to the first chamber 11. After the valve core 31 is completely closed, the medium can be continuously supplied to the first chamber 11 through the water inlet assembly 40.

[0065] It can be understood that by providing the connecting rod 212, the valve core 31 and the piston part 21 can move synchronously. When the first chamber 11 is replenished with the medium, through the overlapping part of the stroke of the valve core 31 and the connecting rod 212, the delayed closing of the communication channel 13 can be achieved, and then at least part of the remaining medium in the second chamber 12 can be recycled through the negative pressure action, so as to achieve the effect of saving the medium for the medium pump 100. For a medium pump 100 with a better effect of saving the medium, when applied to an oral care device, after each periodic spraying and washing action is completed, at least part of the remaining medium in the second chamber 12 can flow back to the first chamber 11, so as to reduce the water consumption when the oral care device performs the flushing action. On the one hand, in the same water tank usage scenario, the endurance effect of the oral care device according to the embodiment of the present application is stronger, the number of times of filling the water tank is less, and the user experience is better. In the embodiment of the oral care device using a small water tank, the oral care device can perform more spraying and washing actions and more flushing times, which can meet the flushing requirements and improve the flushing effect, and thus take into account both portability and cleaning effect.

[0066] It should be noted that the volume of the first chamber 11 is related to the jet energy of the oral care device, and the present application does not make any changes to the volume of the first chamber 11. By allowing at least part of the remaining medium in the second chamber 12 to flow back, during the periodic completion of the spraying and washing action, there is less remaining medium in the second chamber 12, and the loss of jet energy is smaller, which can also improve the cleaning effect.

[0067] According to the medium pump 100 of the embodiment of the present application, the effect of saving the medium is better, and it can further improve the user experience of the oral care device, taking into account both the portability requirements and the cleaning effect requirements of the oral care device.

[0068] Combined with Figure 1 、 Figure 3 and Figure 3As shown, according to some embodiments of the present application, the piston portion 21 is adapted to switch between a first position and a third position, and in the third position, the piston portion 21 is adapted to close the communication channel 13 on one side of the first chamber 11; the valve core 31 is adapted to switch between a second position and a third position, and in the second position, the valve core 31 is adapted to close the communication channel 13 on one side of the second chamber 12, and the movement stroke between the first position and the third position is greater than the movement stroke between the second position and the third position, so that the connecting rod 212 is adapted to push the valve core 31 to switch from the second position to the third position when moving to the second position, and during the reset process of the piston portion 21 to the first position, push against the valve core 31 to delay the closing of the communication channel 13.

[0069] In other words, the piston portion 21 is adapted to switch between a first position and a third position, and in the third position, the piston portion 21 is adapted to close the communication channel 13 on one side of the first chamber 11; the valve core 31 is adapted to switch between a second position and a third position, and in the second position, the valve core 31 is adapted to close the communication channel 13 on one side of the second chamber 12, and the movement stroke between the first position and the third position is greater than the movement stroke between the second position and the third position, so that the connecting rod 212 is adapted to push the valve core 31 to switch from the second position to the third position, and during the reset process of the piston portion 21 to the first position, push against the valve core 31 to delay the closing of the communication channel 13.

[0070] Wherein, when the piston portion 21 is in the first position, the connecting rod 212 is at point A, and when the piston portion 21 is in the third position, the connecting rod 212 is at point C, that is, the first position is point A, and the second position corresponds to point B.

[0071] Specifically, in the third position, the piston portion 21 closes the communication channel 13 on one side of the first chamber 11 to prevent the medium in the second chamber 12 from flowing back to the first chamber 11 during the spraying and washing operation, improving the medium utilization rate and the cleaning effect. In the fourth position, the valve core 31 closes the communication channel 13 on one side of the second chamber 12, so that when the piston portion 21 moves, the valve core 31 can respond quickly to improve the response speed of the medium pump 100.

[0072] Furthermore, the movement stroke of the piston portion 21 is greater than the movement stroke of the valve core 31. Before the valve core 31 moves to point B, under the pushing action of the connecting rod 212, the time to reach point B can be delayed, so as to realize the delayed closing of the communication channel 13. During the delayed closing stage, the second chamber 12 communicates with the first chamber 11, and the first chamber 11 is in a negative pressure state, so that at least part of the medium in the second chamber 12 can flow back to the first chamber 11 under the action of the negative pressure, so as to achieve the above effect of saving the medium. In other words, the piston portion 21 is adapted to switch between the first position and the third position, and in the third position, the piston portion 21 is adapted to close the communication channel 13 on one side of the first chamber 11; the valve core 31 is adapted to switch between the second position and the third position, and in the second position, the valve core 31 is adapted to close the communication channel 13 on one side of the second chamber 12, and the movement stroke between the first position and the third position is greater than the movement stroke between the second position and the third position, so that the connecting rod 212 is adapted to push the valve core 31 to switch from the second position to the third position, and during the process of the piston portion 21 resetting to the first position, the valve core 31 is pushed to delay the closing of the communication channel 13.

[0073] Wherein, when the piston portion 21 is in the first position, the connecting rod 212 is at point A, and when the piston portion 21 is in the third position, the connecting rod 212 is at point C, that is, the first position is point A, and the second position corresponds to point B.

[0074] Specifically, in the third position, the piston portion 21 closes the communication channel 13 on one side of the first chamber 11 to prevent the medium in the second chamber 12 from flowing back to the first chamber 11 during the spraying action, improve the medium utilization rate and the cleaning effect. In the fourth position, the valve core 31 closes the communication channel 13 on one side of the second chamber 12, so that when the piston portion 21 moves, the valve core 31 can respond quickly to improve the response speed of the medium pump 100.

[0075] Furthermore, the movement stroke of the piston portion 21 is greater than the movement stroke of the valve core 31. Before the valve core 31 moves to point B, under the pushing action of the connecting rod 212, the time to reach point B can be delayed, so as to realize the delayed closing of the communication channel 13. During the delayed closing stage, the second chamber 12 communicates with the first chamber 11, and the first chamber 11 is in a negative pressure state, so that at least part of the medium in the second chamber 12 can flow back to the first chamber 11 under the action of the negative pressure, so as to achieve the above effect of saving the medium.

[0076] Such as Figure 2 and Figure 3As shown, the drainage assembly 30 has a medium outlet 321 communicating with the second chamber 12. The valve core 31 includes: a first sealing end 312. The drainage assembly 30 has an elastic member 33. The first sealing end 312 is adapted to close the medium outlet 321. The elastic member 33 abuts against the first sealing end 312 to drive the valve core 31 to move within the second chamber 12. The valve core 31 further includes: a mating section 311 and a second sealing end 313. The mating section 311 is connected to the first sealing end 312. The elastic member 33 is sleeved on the mating section 311. The second sealing end 313 is opposite to the first sealing end 312 in the moving direction of the valve core 31. The second sealing end 313 is adapted to close the communication channel 13 on one side of the second chamber 12. The elastic member 33 is adapted to drive the second sealing end 313 to close the communication channel 13. The drainage assembly 30 includes a valve seat 32. The valve seat 32 is connected to the pump body 10 and defines the medium outlet 321. The first sealing end 312 cooperates with the valve seat 32 to close the medium outlet 321.

[0077] Wherein, the connecting rod 212 is used to drive the valve core 31 to move from the second position to the third position, and the elastic member 33 is used to drive the valve core 31 to reset from the third position to the second position.

[0078] That is to say, during the process of the first sealing end 312 closing the medium outlet 321, the valve core 31 needs to overcome the elastic force of the elastic member 33 under the action of the connecting rod 212 and the medium pressure. During the reset process of the valve core 31, the elastic member 33 can provide a reset force to drive the valve core 31 to reset to close the communication channel 13. During the reset process, the push rod 212 can abut against the valve core 31 to prevent its reset, so as to achieve the technical purpose of delaying the closing of the communication channel 13. Specifically, the valve seat 32 is detachably arranged at one end of the pump body 10. A sealing structure can be arranged between the valve seat 32 and the pump body 10 to realize the sealing between the valve seat 32 and the pump body 10. The valve seat 32 defines the medium outlet 321. When the valve core 31 is in the third position, the second chamber 12 communicates with the medium outlet 321. When the valve core 31 moves from the second position to the third position, the medium in the first chamber 11 enters the second chamber 12. And a part of the medium entering the second chamber 12 can be ejected from the medium outlet 321 under the pushing action of the valve core 31 to output a medium flow with a certain pressure and high jet energy to achieve the cleaning effect. After the valve core 31 moves to the third position, a part of the medium will remain in the second chamber 12. At least part of the remaining medium can flow back to the first chamber 11 to achieve the effect of saving medium.

[0079] Such as Figure 4As shown, according to some embodiments of the present application, the valve core 31 includes a mating section 311, a first sealing end 312, and a second sealing end 313. The mating section 311 is connected to the first sealing end 312. The second sealing end 313 is opposite to the first sealing end 312 in the moving direction of the valve core 31. The first sealing end 312 is adapted to cooperate with the valve seat 32 to close the medium outlet 321, and the second sealing end 313 is adapted to close the communication channel 13 on one side of the second chamber 12. Specifically, the mating section 311 is movably arranged on the valve seat 32. When the valve core 31 is in the fourth position, the first sealing end 312 can block the water outlet from the second chamber 12, reducing the loss of jet energy, improving the medium jetting effect, and thus improving the cleaning effect. The arrangement of the mating section 311 can improve the movement smoothness and reliability of the valve core 31, reduce the shaking of the valve core 31, and further reduce the loss of jet energy. The arrangement of the second sealing end 313 can improve the sealing effect of the valve core 31 on the first chamber 11 in the fourth position, improve the response speed of the valve core 31, and thus improve the working efficiency of the medium pump 100.

[0080] Combined with Figure 3 and Figure 4 As shown, according to some embodiments of the present application, the drainage assembly 30 further includes an elastic member 33. The elastic member 33 is sleeved on the mating section 311, and both ends of the elastic member 33 respectively abut against the valve seat 32 and the first sealing end 312 to drive the second sealing end 313 to close the communication channel 13.

[0081] Specifically, the elastic member 33 can be configured as a linear spring and sleeved on the mating section 311. A receiving groove can be provided on the valve seat 32 for receiving the elastic member 33, and when the valve core 31 is in the third position, it can be used to receive at least part of the valve core 31 to improve the sealing effect of the first sealing end 312 and assist the valve core 31 to reset through the elastic member 33. The connecting rod 212 can overcome the elastic force of the elastic member 33 to achieve a delayed closing of the communication channel 13.

[0082] Of course, the setting position of the elastic member 33 in the embodiments of the present application is not limited to this. In some other embodiments, the elastic member 33 can be configured as a tension spring and arranged in the second chamber 12 to pull the valve core 31 to move towards the first chamber 11, and the connecting rod 212 can overcome the elastic force of the tension spring to make the valve core 31 in the third position or delay the movement to the fourth position.

[0083] As Figure 3 shown, according to some embodiments of the present application, the piston assembly 20 includes a cylinder block 22. The cylinder block 22 is arranged in the first chamber 11 and defines a pump chamber 221. The piston body 211 is arranged in the pump chamber 221 to switch between the first position and the third position. The connecting rod 212 passes through the pump chamber 221 and at least partially extends into the second chamber 12.

[0084] Thus, the cylinder block 22 can be disposed in the first chamber 11, and the pump chamber 221 can be communicated with the second chamber 12. By providing the pump chamber 221, the difficulty of assembling the piston assembly 20 onto the pump body 10 can be reduced, the assembly efficiency can be improved. At the same time, with a smaller volume of the pump chamber 221, the jet energy of the medium can be greater and the cleaning effect can be better. According to some embodiments of the present application, the medium pump 100 further includes: a driving member, and a crank 200 of the driving member is sealingly connected to the piston body 211.

[0085] Specifically, as shown in combination with Figure 2 , Figure 7 and Figure 8 , an installation cavity 2111 is provided on the piston body 211, the end of the crank 200 is installed in the installation cavity 2111, and a water bag structure for sealingly cooperating with the first chamber 11 is provided at the end of the crank 200.

[0086] Wherein, the piston body 211 includes: a piston shell 2112 and a seal 2113. The piston shell 2112 is connected to the connecting rod 212. A connecting portion 2114 is provided at one end of the piston shell 2112 connected to the connecting rod 212. The connecting portion 2114 is connected to the seal 2113. The seal 2113 is sealingly fitted with the cylinder block 22. A sealing portion 2115 is provided at one end of the seal 2113 away from the crank 200. The sealing portion 2115 extends radially outward and is in interference fit with the inner wall of the cylinder block 22.

[0087] That is to say, the crank 200 is used to input power and push the piston body 211 and the connecting rod 212 to move. A sealing structure (i.e., the seal 2113) can be provided on the piston body 211. The seal 2113 can be sealingly fitted with the inner wall of the cylinder block 22 through the sealing portion 2115 to improve the working stability and reliability of the piston assembly 20. The crank 200 and the piston body 211 form a kinematic pair. Further, in order to improve the stability and reliability of the oral care device 100, a dynamic sealing structure can be provided between the piston body 211 and the crank 200, such as a water bag structure, to prevent the medium in the pump chamber 221 from entering the driving member, causing damage to the driving member, reducing potential safety hazards, and extending the service life.

[0088] As shown in combination with Figure 2 and Figure 3 , according to some embodiments of the present application, the medium pump 100 further includes: a water inlet assembly 40. The water inlet assembly 40 is connected to the pump body 10, and the water inlet assembly 40 is communicated with the communication channel 13 and is adapted to supply the medium to the first chamber 11 through the communication channel 13.

[0089] Specifically, the water inlet assembly may include: an inlet pipeline, which is arranged on the pump body 10, and an inlet check valve is arranged inside the inlet pipeline. The inlet check valve is located upstream of the communication channel 13 and is adapted to controllably connect the water inlet assembly 40 and the communication channel 13 selectively, that is, to achieve one-way conduction between the water inlet assembly 40 and the pump chamber 221, so that the medium can enter the pump chamber 221 from the water inlet assembly 40. When the medium interacts between the pump chamber 221 and the second chamber 12, the medium can be prevented from flowing back to the water inlet assembly 40, reducing the pressure loss of the medium and increasing the jet energy to ensure the cleaning effect.

[0090] It can be understood that, according to some embodiments of the present application, the drainage assembly 30 is arranged axially on the pump body 10, the water inlet assembly 40 is arranged radially on the pump body 10, and the inlet pipeline of the water inlet assembly 40 extends axially along the pump body 10.

[0091] That is to say, the crank 200 and the drainage assembly 30 are located at the two axial ends of the pump body 10, while the inlet pipeline is arranged radially on the pump body 10 and includes a radial pipe section and an axial pipe section. The radial pipe section is connected to the communication channel 13 of the pump body 10, and the axial pipe section is connected to the radial pipe section and extends axially along the pump body 10, making the overall spatial layout of the fluid pump 100 more compact, occupying less space, reducing the layout difficulty of the fluid pump 100, and meeting the requirements of miniaturization and portability design of the oral care device.

[0092] The present application proposes an oral care device, including: the fluid pump 100 in the above embodiments.

[0093] According to the oral care device of the embodiments of the present application, by using the above fluid pump 100, the fluid saving effect of the fluid pump 100 enables the oral care device of the embodiments of the present application to have a better battery life under the premise of using the same water tank, allowing for more flushing times, fewer water tank filling operations, and improved user experience. In the case where the oral care device uses a small water tank, the oral care device of the embodiments of the present application can perform more spraying and washing operations, taking into account both portability requirements and cleaning effect requirements.

[0094] The other components and operations of the fluid pump 100 and the oral care device according to the embodiments of the present application are known to those of ordinary skill in the art and will not be elaborated here.

[0095] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0096] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this application, and the scope of this application is defined by the claims and their equivalents.

Claims

1. A medium pump, applied to an oral care device, characterized in that, Comprising: A pump body having a first chamber, a second chamber, and a communication passage communicating the first chamber and the second chamber; A piston assembly disposed in the first chamber, and a piston portion of the piston assembly being movably disposed in the first chamber; A drainage assembly disposed in the second chamber, and a valve core of the drainage assembly being movably disposed in the second chamber and adapted to close the communication passage between the first chamber and the second chamber; Wherein The piston portion includes: a piston body and a connecting rod. The connecting rod passes through the communication passage to at least partially extend into the second chamber, and the movement stroke of the connecting rod at least partially coincides with the movement stroke of the valve core.

2. The media pump according to claim 1, wherein The piston portion is adapted to switch between a first position and a third position, and in the third position, the piston portion is adapted to close the communication passage on the first chamber side; The valve core is adapted to switch between a second position and a third position, and in the second position, the valve core is adapted to close the communication passage on the second chamber side, and the movement stroke between the first position and the third position is greater than the movement stroke between the second position and the third position, so that the connecting rod is adapted to push the valve core to switch from the second position to the third position when moving to the second position, and during the resetting of the piston portion to the first position, push against the valve core to delay closing the communication passage.

3. The media pump according to claim 1, wherein The drainage assembly has a medium outlet communicating with the second chamber. The valve core includes: a first sealing end. The drainage assembly further includes an elastic member. The first sealing end is adapted to close the medium outlet, and the elastic member pushes against the first sealing end to drive the valve core to move in the second chamber.

4. The media pump according to claim 3, characterized in that, The valve core further includes: a mating section connected to the first sealing end, and the elastic member is sleeved on the mating section.

5. The media pump according to claim 4, characterized in that, The valve core further includes: a second sealing end opposite to the first sealing end in the movement direction of the valve core. The second sealing end is adapted to close the communication passage on the second chamber side, and the elastic member is adapted to drive the second sealing end to close the communication passage.

6. The media pump according to any one of claims 3-5, characterized in that, The drainage assembly includes a valve seat connected to the pump body and defining the medium outlet. The first sealing end cooperates with the valve seat to close the medium outlet.

7. The media pump according to claim 2, characterized in that, The piston assembly includes: a cylinder body disposed in the first chamber and defining a pump chamber. The piston body is disposed in the pump chamber to switch between the first position and the third position, and the connecting rod passes through the pump chamber to at least partially extend into the second chamber.

8. The media pump according to claim 7, characterized in that, Further comprising: A driving member, and a crank of the driving member is sealingly connected to the piston body.

9. The media pump according to claim 8, characterized in that An installation cavity is provided on the piston body. The end of the crank is installed in the installation cavity, and a water bag structure for sealing cooperation with the first chamber is provided at the end of the crank.

10. The media pump according to claim 8, characterized in that, The piston body includes: a piston shell and a seal. The piston shell is connected to the connecting rod. A connecting portion is provided at one end of the piston shell connected to the connecting rod. The connecting portion is connected to the seal, and the seal is sealingly engaged with the cylinder body.

11. The media pump according to claim 10, characterized in that, One end of the seal away from the crank is provided with a sealing portion, which extends radially outward and is in interference fit with the inner wall of the cylinder block.

12. The media pump according to claim 1, characterized in that, Further comprising: A water inlet assembly, which is connected to the pump body, and the water inlet assembly is in communication with the communication channel and is adapted to supply a medium to the first chamber through the communication channel.

13. The media pump according to claim 12, characterized in that, The water inlet assembly includes a check valve, which is located upstream of the communication channel and is adapted to controllably connect the water inlet assembly to the communication channel.

14. The media pump according to claim 12, characterized in that, The drainage assembly is arranged axially of the pump body, the water inlet assembly is arranged radially of the pump body, and the inlet pipeline of the water inlet assembly extends axially of the pump body.

15. An oral care device, characterized in that, Comprising: The medium pump according to any one of claims 1-14.

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