Oral care device and fluid pump therefor

Abstract

The application discloses an oral care device and a liquid pump thereof, wherein the liquid pump comprises a power assembly, a transmission assembly and a pump head assembly, the pump head assembly comprises a pump shell, a pump liquid piece and a pump cavity; the liquid pump comprises a liquid suction stroke and a liquid pumping stroke; the transmission assembly comprises a first transmission piece connected with the power assembly and a second transmission piece connected with the pump liquid piece, the first transmission piece and the second transmission piece form a liquid pumping cooperation section and a liquid suction cooperation section, the first transmission piece and the second transmission piece cooperate in the liquid pumping cooperation section when the liquid pump is in the liquid pumping stroke, and the first transmission piece and the second transmission piece cooperate in the liquid suction cooperation section when the liquid pump is in the liquid suction stroke; in the case that the movement stroke of the power assembly is the same, the movement amplitude of the pump liquid piece in the liquid pumping cooperation section is greater than the movement amplitude of the pump liquid piece in the liquid suction cooperation section. Through the above arrangement, water saving is realized under the premise of ensuring the cleaning effect of the oral cavity, the water tank of the oral care device can be made smaller, and the portability is improved.

Description

Technical Field

[0001] This application relates to the field of oral hygiene technology, and more particularly to an oral care device and its liquid pump. Background Technology

[0002] As living standards improve, people are becoming more aware of oral care, and the market offers a wider variety of oral cleaning tools. Among them, water flossers, as an alternative to traditional dental floss, have become an essential household appliance. Their basic working principle involves using a pump to draw water from a tank and then spraying it through a nozzle at a rate of hundreds or even thousands of high-pressure pulses per minute to clean food debris and plaque from between teeth, as well as massage the gums, thus improving the oral environment.

[0003] Due to the limited capacity of the water tank in oral irrigators, users need to refill the water frequently. Increasing the water tank capacity would result in a larger tank size, making it inconvenient for users to hold and increasing its weight, thus increasing the difficulty of use. Therefore, it is particularly important to achieve water conservation without affecting the oral cleaning effect. Utility Model Content

[0004] This application provides a liquid pump for an oral care device that saves water while ensuring oral cleaning effectiveness. The water tank of the oral care device can be made smaller, improving portability.

[0005] To solve the above-mentioned technical problems, this application provides a liquid pump for an oral care device. The liquid pump includes a power component, a transmission component, and a pump head assembly. The pump head assembly includes a pump housing and a liquid pumping component. The liquid pumping component and the pump housing together form a pump chamber for containing liquid, and the liquid pumping component is connected to the power component through the transmission component.

[0006] During a single cycle of the liquid pump, the liquid pump includes a suction stroke and a pumping stroke. When the liquid pump is in the suction stroke, the pump cavity becomes larger, and when the liquid pump is in the pumping stroke, the pump cavity becomes smaller.

[0007] The transmission assembly includes a first transmission member and a second transmission member. The first transmission member is connected to the power assembly, and the second transmission member is connected to the pump head assembly. A pump-liquid engagement section and a suction engagement section are formed between the first transmission member and the second transmission member. When the pump is in the pump-liquid stroke, the first transmission member and the second transmission member engage in the pump-liquid engagement section. When the pump is in the suction stroke, the first transmission member and the second transmission member engage in the suction engagement section.

[0008] Wherein, when the motion stroke of the power components is the same, the motion amplitude of the pumping component in the pumping-liquid engagement section is greater than the motion amplitude of the pumping component in the suction-liquid engagement section.

[0009] In some embodiments of this application, the power component outputs uniform motion.

[0010] In some embodiments of this application, the first transmission member and the second transmission member form an inclined surface fit, the fit slope of the pump-liquid fit section is greater than the fit slope of the suction fit section, and / or, the length of the pump-liquid fit section is less than the length of the suction fit section.

[0011] In some embodiments of this application, one of the first transmission member and the second transmission member is provided with a sloping annular platform, and the other is provided with a mating part. The annular platform forms a pumping section and a suction section. The mating part and the pumping section form a pumping mating section, and the mating part and the suction section form a suction mating section.

[0012] In some embodiments of this application, the annular platform is formed by connecting the pump section and the suction section end to end.

[0013] In some embodiments of this application, the annular platform further includes a planar segment connected between the pumping section and the suction section.

[0014] In some embodiments of this application, the rotation direction of the power component is controlled by first driving the planar segment to engage with the mating part, and then driving the pumping segment to engage with the mating part, and / or, first driving the suction segment to engage with the mating part, and then driving the planar segment to engage with the mating part.

[0015] In some embodiments of this application, the first transmission member includes a rotary pressure plate that is transmissionally connected to the power assembly. The rotary pressure plate is provided with an annular platform, which includes a pumping section and a suction section.

[0016] The second transmission component includes a swing arm rotatably connected to the pump housing and abutting against the pumping liquid component. The swing arm has a mating part that is in transmission engagement with the annular platform. The mating part and the pumping liquid section form the pumping liquid mating section, and the mating part and the suction section form the suction liquid mating section.

[0017] In some embodiments of this application, the annular platform satisfies at least one of the following conditions:

[0018] The pump section and the suction section transition smoothly;

[0019] The circumferential arc length of the liquid suction section along the rotation direction of the rotating pressure plate is A, and the circumferential arc length of the liquid pumping section along the rotation direction of the rotating pressure plate is B. The ratio of A to B is greater than 1 and not greater than 10.

[0020] In the rotation direction of the rotary pressure plate, the protrusion height of the liquid suction section toward the mating part gradually decreases, and the protrusion height of the liquid pumping section toward the mating part gradually increases;

[0021] The annular platform also includes a pressure-holding section, which is located between the end of the pumping section and the beginning of the suction section along the rotation direction of the rotating pressure plate, and the protrusion height of the pressure-holding section toward the mating part is not less than the protrusion height of the pumping section.

[0022] In some embodiments of this application, the transmission assembly includes a first rolling element, which is rotatably disposed on the mating portion and rolls in engagement with the annular platform.

[0023] In some embodiments of this application, the annular platform is an arcuate surface adapted to the first rolling element; and / or, the rotating pressure plate has an annular track on the surface opposite to the first rolling element, and the transmission assembly further includes a second rolling element that rollably presses against the annular track.

[0024] In some embodiments of this application, the first transmission member further includes a gear disk, which is coaxially connected to the rotating pressure plate and is drively connected to the power component. The gear disk includes an annular lifting surface disposed opposite to the annular platform. The annular lifting surface includes an effective lifting section corresponding to the liquid suction section and an ineffective lifting section corresponding to the liquid pumping section. The mating part forms a liquid suction mating section with the liquid pumping section and the effective lifting section, and the mating part forms a liquid pumping mating section with the liquid pumping section and the ineffective lifting section.

[0025] In some embodiments of this application, the power assembly includes a motor and a bevel gear. The motor is mounted on the pump housing and located on the side of the gear disk opposite to the pump fluid component. The bevel gear is connected to the output shaft of the motor and meshes with the gear disk.

[0026] In some embodiments of this application, the peripheral sidewall of the rotating pressure plate is provided with an annular track groove, the mating part extends into the annular track groove, and the annular platform is the groove wall of the annular track groove facing the side where the pump liquid component is located.

[0027] In some embodiments of this application, the liquid pump further includes a compression spring disposed on the side of the swing arm facing the pumping component, for pushing the swing arm to move away from the pumping component, thereby achieving the liquid suction stroke; and / or

[0028] The liquid pump also includes a tension spring, which is disposed on the side of the swing arm away from the pump liquid component, for pulling the swing arm to move away from the pump liquid component, so as to realize the liquid suction stroke.

[0029] In some embodiments of this application, the second transmission member includes a swing arm and a pressing part. The swing arm is rotatably connected to the pump housing and has a mating part that is in transmission cooperation with the first transmission member. The pressing part is connected to the swing arm and the pump liquid component. A first line is formed between the midpoint of the stroke of the pressing part following the swing of the swing arm and the swing center of the swing arm. The first line is perpendicular to the thickness direction of the liquid pump.

[0030] In some embodiments of this application, the side of the swing arm facing the pump fluid component has a clearance groove, and the pressing part is at least partially disposed in the clearance groove.

[0031] In some embodiments of this application, the pump component includes a diaphragm, and the surface of the pressing portion that presses against the diaphragm is an arc-shaped surface.

[0032] In some embodiments of this application, the liquid pump further includes a clamping member, which is arranged around the periphery of the pressing portion and connected to the pump housing, for pressing the peripheral edge of the diaphragm against the pump housing.

[0033] In some embodiments of this application, the pump chamber is a cylindrical cavity.

[0034] To address the aforementioned technical problems, this application also provides an oral care device, which includes a liquid pump, a housing, a water tank, and a nozzle as described in any of the above embodiments. The liquid pump is disposed within the housing, the water tank is disposed within the housing and communicates with the pump chamber, and the nozzle is disposed within the housing and communicates with the pump chamber.

[0035] The beneficial effects of this application are as follows: When the stroke of the power component providing power is the same, by limiting the movement amplitude of the pumping component in the pumping-liquid engagement section to be greater than that in the suction-liquid engagement section, that is, the time for the pumping component to complete a single pumping stroke is extremely short compared to the time for it to complete a single suction stroke, this lengthens the time for the pumping component to draw liquid into the pump chamber during the suction stroke, while shortening the time for it to pump liquid out of the pump chamber during the pumping stroke. This achieves slow suction and fast pumping within a single suction stroke. This design allows the pump to slowly draw in liquid during the entire oral care device's flossing process, avoiding excessive liquid intake and waste. Simultaneously, it rapidly pumps out the liquid from the pump chamber, conserving water. Furthermore, it maintains a high-pressure jet of liquid during pumping to ensure effective oral cleaning, reducing the frequency of refills. Therefore, by achieving water conservation while maintaining effective oral cleaning, the oral care device's water tank can be made smaller, improving portability and ultimately enhancing the user experience. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the overall structure of an oral care device provided in one embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the structure of a liquid pump provided in one embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the structure of a liquid pump provided in one embodiment of this application from another perspective;

[0040] Figure 4 This is a schematic diagram of the internal structure of a liquid pump provided in an embodiment of this application;

[0041] Figure 5 This is a cross-sectional structural diagram of a liquid pump provided in one embodiment of this application;

[0042] Figure 6 This is a schematic diagram of the structure of the first transmission component provided in an embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the structure of a rotary pressure plate provided in one embodiment of this application;

[0044] Figure 8 This is a schematic diagram of the structure of a gear disk provided in one embodiment of this application;

[0045] Figure 9 This is a schematic diagram of the structure of the second transmission component provided in an embodiment of this application;

[0046] Figure 10 This is a schematic diagram of the structure of a rotary pressure plate provided in another embodiment of this application;

[0047] Figure 11 A cross-sectional view of a liquid pump provided in another embodiment of this application;

[0048] Figure 12 A cross-sectional structural schematic diagram of a liquid pump provided in another embodiment of this application;

[0049] Figure 13 A cross-sectional structural schematic diagram of a liquid pump provided in another embodiment of this application;

[0050] Figure 14 for Figure 5 A magnified view of a portion of point C in the middle;

[0051] Figure 15 This is a schematic diagram of the structure of a pump casing body provided in an embodiment of this application;

[0052] Figure 16 This is a schematic diagram of the structure of the pump housing body and the clamping member provided in an embodiment of this application;

[0053] Figure 17 This is a cross-sectional structural diagram of the pump housing body and the clamping member provided in an embodiment of this application.

[0054] Figure label:

[0055] 100. Oral care device; 10. Housing; 20. Nozzle; 30. Liquid pump; 1. Pump head assembly; 11. Pump housing; 111. Pump housing body; 1111. Mounting groove; 112. Pump cover; 12. Pump liquid component; 121. Diaphragm; 13. Pump chamber; 2. Transmission assembly; 21. First transmission component; 211. Rotary pressure plate; 2111. Annular track; 2112. Annular track groove; 2113. Rotary sub-pressure plate; 212. Gear disk; 2121. Transmission boss; 22. Second Transmission components; 221, swing arm; 2211, clearance groove; 222, pressing part; 23, annular platform; 231, pumping section; 232, suction section; 233, planar section; 234, pressure holding section; 24, mating part; 241, first rolling element; 242, mating rod; 25, second rolling element; 26, annular lifting surface; 261, effective lifting section; 262, ineffective lifting section; 3, power assembly; 31, motor; 32, bevel gear; 4, compression spring; 5, tension spring; 6, clamping component. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0057] This application provides an oral care device 100, please refer to... Figures 1 to 3 The oral care device 100 includes a housing 10, a water tank (not shown), a nozzle 20, and a pump 30. The oral care device 100 may be, but is not limited to, a water flosser or an electric toothbrush with a water flossing function.

[0058] The housing 10 is used to provide installation space. The shape of the housing 10 includes, but is not limited to, cylindrical, cuboid, and elliptical shapes. The housing 10 is provided with a water outlet.

[0059] The water tank can be located inside or outside the housing 10. In this embodiment, the water tank is located inside the housing 10 and connected to the water outlet pipe via a thin flexible tube. The water tank is fixedly installed inside the housing 10, such as by screws, clips, or adhesive. The water tank is used to store liquid and provide water for users to use when rinsing their teeth, making it convenient for users to use anytime and anywhere.

[0060] The nozzle 20 is mounted on the housing 10. The nozzle 20 and the housing 10 can be integrally formed or have a separate structure; no specific limitation is made here. The nozzle 20 is also connected to the water outlet. The nozzle 20 is used to guide the pumped liquid so that, when used by the user, it can accurately clean the areas in the mouth that need cleaning, thereby thoroughly cleaning food debris and plaque from between teeth and massaging the gums, thus improving the oral environment.

[0061] A liquid pump 30 is disposed within the housing 10. The liquid pump 30 has a pump chamber 13, which is connected to the water tank pipeline. The pump chamber 13 is also connected to the nozzle 20 through a water outlet. The liquid pump 30 is used to pump water from the water tank out of the water outlet to rinse away food debris and plaque from between the user's teeth. When rinsing the teeth, the oral care device 100 can provide the user with a high-pressure jet rinsing effect and can reduce the number of times the user needs to add water to the water tank, thereby improving the user experience. In order to achieve water conservation while cleaning the mouth and reducing the number of times the user needs to add water, and also to make the water tank of the oral care device smaller and improve portability, this application also provides a liquid pump 30 for the oral care device 100.

[0062] Please refer to Figures 2 to 8The oral care device 100 includes a pump head assembly 1, a transmission assembly 2, and a power assembly 3 in its liquid pump 30.

[0063] The pump head assembly 1 includes a pump housing 11 and a pumping component 12. The pump housing 11 has a shape including but not limited to a cylindrical, cuboid, or elliptical shape. The pump housing 11 is fixedly installed inside the housing 10, and the installation method can be by screw fixation, which will not be described in detail here. The pump housing 11 includes a pump housing body 111 and a pump cover 112 connected to the pump housing body 111. The pump chamber 13 is formed in the pump housing body 111.

[0064] The pumping component 12 is movably mounted on the pump housing body 111, with at least a portion protruding outside the pump housing body 111. The pumping component 12 and the pump housing body 111 together form a pump chamber 13 for containing liquid. The pump chamber 13 is connected to a water tank pipeline and also to a nozzle 20 via an outlet, thus providing a complete water path for the liquid flow of the oral care device 100. The pumping component 12 is connected to a power component 3 via a transmission assembly 2, which provides power for the reciprocating movement of the pumping component 12. Within a single cycle of the pump 30, the pump 30 includes a suction stroke and a pumping stroke. When the pump 30 is in the suction stroke, the pump chamber 13 expands; when the pump 30 is in the pumping stroke, the pump chamber 13 contracts.

[0065] Understandably, when the pump chamber 13 is accumulating water, the liquid pump 30 is in a single suction stroke. The operation of the pumping component 12 creates a negative pressure state within the pump chamber 13 to draw water from the water tank into the pump chamber 13. Simultaneously, as the pumping component 12 moves, the pump chamber 13 expands to accumulate more water. Conversely, when the liquid pump 30 is in a single pumping stroke, the pumping component 12 compresses the space within the pump chamber 13 to expel the water. Simultaneously, as the pumping component 12 moves, it further compresses the space within the pump chamber 13, causing the pump chamber 13 to shrink.

[0066] In some embodiments of this application, the pump chamber 13 is a cylindrical cavity. This design effectively reduces liquid resistance and pressure drop during both liquid suction and pumping processes, thereby improving the smoothness and stability of liquid flow during suction and pumping. This enhances the stability and reliability of the output water, providing a stable guarantee for the user's experience.

[0067] The transmission assembly 2 includes a first transmission member 21 and a second transmission member 22. Both the first transmission member 21 and the second transmission member 22 are movably mounted on the pump housing body 111 and distributed along the length of the pump housing body 111. An active space is formed within the housing 10 for the first transmission member 21 and the second transmission member 22 to move. The first transmission member 21 is connected to the power assembly 3, and the second transmission member 22 is connected to the pump head assembly 1, that is, movably connected to the pump housing body 111. A pumping-liquid engagement section and a suction-liquid engagement section are formed between the first transmission member 21 and the second transmission member 22. When the pump 30 is in the pumping stroke, the first transmission member 21 and the second transmission member 22 engage in the pumping-liquid engagement section; when the pump 30 is in the suction stroke, the first transmission member 21 and the second transmission member 22 engage in the suction-liquid engagement section.

[0068] Among them, when the motion stroke of the power component 3 is the same, the motion amplitude of the pump liquid component 12 in the pump liquid engagement section is greater than the motion amplitude of the pump liquid component 12 in the liquid suction engagement section.

[0069] In some embodiments of this application, to ensure that the movement stroke of the power assembly 3 is the same, the power assembly 3 outputs a uniform speed, and the movement amplitude of the pumping component 12 in the pumping engagement section is greater than the movement amplitude of the pumping component 12 in the suction engagement section. It is understood that, since the power assembly 3 maintains a uniform output speed, when controlling the movement amplitude of the pumping component 12, the movement amplitude of the pumping component 12 can be changed only by coordinating with the pumping engagement section and the suction engagement section. This results in the pumping time being extremely short compared to the suction time. Thus, the pump 30 draws in liquid slowly during suction to avoid drawing in too much liquid and causing waste, while during pumping, it can quickly pump out the liquid from the pump chamber 13, thereby achieving water conservation. Simultaneously, during pumping, it can maintain a high-pressure jet state of liquid to ensure the effectiveness of oral cavity cleaning.

[0070] The technical solution of this application limits the movement amplitude of the pumping component 12 in the pumping engagement section to be greater than that in the suction engagement section, while ensuring the same stroke of the power component 3 providing power. In other words, the time of the pumping component 12 during a single pumping stroke is extremely short compared to the time during a single suction stroke. This lengthens the time it takes for the pumping component 12 to draw liquid into the pump chamber 13 during the suction stroke, while shortening the time it takes for the pumping component 12 to pump liquid out of the pump chamber 13 during the pumping stroke. This achieves slow suction and fast pumping within a single suction stroke. With this configuration, during the entire oral care device 100 operation, the pump 30 draws liquid slowly during suction to avoid excessive liquid intake and waste, while rapidly pumping liquid out of the pump chamber 13 during pumping, thus saving water. Simultaneously, it maintains a high-pressure jet of liquid during pumping to ensure effective oral cleaning, thereby reducing the frequency of water refills and improving the user experience.

[0071] Furthermore, by setting up the structure of the liquid pump 30, water conservation is achieved through slow suction and fast discharge. This eliminates the need to increase or decrease the volume of the water tank. Therefore, water conservation is achieved while ensuring the oral cleaning effect. The water tank of the oral care device can be made smaller, making it easier for users to hold and improving portability and ease of use.

[0072] Please refer to Figures 4 to 8 In some embodiments of this application, the first transmission member 21 and the second transmission member 22 form an inclined surface fit, the fit slope of the pumping liquid fit section is greater than the fit slope of the suction liquid fit section, and / or, the length of the pumping liquid fit section is less than the length of the suction liquid fit section.

[0073] Because the first transmission member 21 and the second transmission member 22 form an inclined surface fit, when the first transmission member 21 is driven onto the pump casing 11, the second transmission member 22 can be oscillatingly mounted on the pump casing 11, so that the rotational motion of the first transmission member 21 can be converted into the oscillating motion of the second transmission member 22. To achieve a pumping time much shorter than the suction time, the slope of the pumping section can be set to be greater than that of the suction section; or, the length of the pumping section can be set to be less than that of the suction section; or, the slope of the pumping section can be set to be greater than that of the suction section, and the length of the pumping section can be set to be less than that of the suction section, thereby more reliably and stably achieving a pumping time much shorter than the suction time.

[0074] Furthermore, in some embodiments of this application, the second transmission member 22 is provided with a sloping annular platform 23, and the first transmission member 21 is provided with a mating part 24. The annular platform 23 forms a pumping section 231 and a suction section 232. The mating part 24 and the pumping section 231 form a pumping mating section, and the mating part 24 and the suction section 232 form a suction mating section. The sloping annular platform 23 and the mating part 24 achieve a sloped fit, wherein the slope of the pumping section 231 is greater than the slope of the suction section 232, making the slope of the pumping mating section greater than the slope of the suction mating section, and the length of the pumping section 231 is less than the length of the suction section 232, making the length of the pumping mating section less than the length of the suction mating section.

[0075] With this configuration, the rotational motion can be converted into an oscillating motion by engaging the annular platform 23 with the inclined surface of the mating part 24. Furthermore, by utilizing the slope of the annular platform 23, the pumping time of the liquid pump 30 during the pumping stroke is much shorter than the suction time during the suction stroke. This achieves a slow suction and fast discharge process for the liquid pump 30, thereby achieving a water-saving effect.

[0076] Specifically, the first transmission component 21 can be a transmission gear, which includes a gear body and a cylindrical rotating cylinder coaxially mounted on the gear body. The rotating cylinder is integrally formed with the gear body, and the inner wall of the rotating cylinder is provided with a cylindrical protrusion. The second transmission component 22 can be a swing arm 221. One end of the swing arm 221 is rotatably connected to the pump housing 11 and connected to the pumping component 12, and the other end forms a mating part 24. The mating part 24 is a cylindrical boss that extends into the rotating cylinder. The outer peripheral wall of the cylindrical boss has an annular groove for the protrusion to extend into. An annular platform 23 is formed on the groove wall of the annular groove facing the gear body.

[0077] The power assembly 3 includes a motor 31 mounted on the pump housing body 111 and a bevel gear 32 connected to the output shaft of the motor 31. The motor 31 is meshed with the gear body through the bevel gear 32. The motor 31 drives the gear body to rotate through the bevel gear 32, thereby driving the rotating drum to rotate. This causes the protrusion to move against the inclined surface of the annular platform 23. The cylindrical protrusion reciprocates into or out of the rotating drum, thereby driving the pumping component 12 to move back and forth. This makes the pumping time of the pump 30 during the pumping stroke extremely short compared to the suction time during the suction stroke, thus achieving the slow suction and fast discharge process of the pump 30, and thus achieving the effect of water saving.

[0078] Furthermore, the annular platform 23 is formed by connecting the pumping section 231 and the suction section 232 end to end, which ensures that the pumping and suction processes of the liquid pump 30 are continuous, so as to maximize the efficiency of pumping and suction.

[0079] In some other embodiments of this application, as shown in the figures, the first transmission member 21 is provided with a sloping annular platform 23, and the second transmission member 22 is provided with a mating part 24. The annular platform 23 forms a pumping section 231 and a suction section 232. The mating part 24 and the pumping section 231 form a pumping mating section, and the mating part 24 and the suction section 232 form a suction mating section. The sloping annular platform 23 and the mating part 24 achieve a sloped fit, wherein the slope of the pumping section 231 is greater than the slope of the suction section 232, making the slope of the pumping mating section greater than the slope of the suction mating section, and the length of the pumping section 231 is less than the length of the suction section 232, making the length of the pumping mating section less than the length of the suction mating section.

[0080] With this configuration, the rotational motion can be converted into an oscillating motion by engaging the annular platform 23 with the inclined surface of the mating part 24. Furthermore, by utilizing the slope of the annular platform 23, the pumping time of the liquid pump 30 during the pumping stroke is much shorter than the suction time during the suction stroke. This achieves a slow suction and fast discharge process for the liquid pump 30, thereby achieving a water-saving effect.

[0081] Furthermore, the annular platform 23 is formed by connecting the pumping section 231 and the suction section 232 end to end. This ensures that the pumping and suction processes of the liquid pump 30 are continuous, thereby maximizing the efficiency of pumping and suction.

[0082] The first transmission member 21 moves in a rotating manner, and the second transmission member 22 moves in a oscillating manner. Since the annular platform 23 is formed on the first transmission member 21 and the mating part 24 is formed on the second transmission member 22, this embodiment has the following advantages compared to the former embodiment: the first transmission member 21 and the second transmission member 22 are flexibly arranged in the thickness direction of the liquid pump 30, which can reduce the thickness of the liquid pump 30 to a certain extent. On the one hand, it is convenient for assembly, and on the other hand, the volume of the liquid pump 30 is reduced, and the volume of the housing 10 can also be reduced accordingly, making it easier for the user to hold and improving the grip.

[0083] In the embodiments of this application, the example of an annular platform 23 formed on the first transmission member 21 and a mating part 24 formed on the second transmission member 22 will be used for further explanation.

[0084] Furthermore, in some embodiments of this application, in order to enable the liquid pump 30 to obtain greater kinetic energy during the pumping stroke, an energy storage stage is provided between the suction section 232 and the pumping section 231. Therefore, the annular platform 23 also includes a planar section 233, which connects the pumping section 231 and the suction section 232. When the mating part 24 engages with the inclined surface of the suction section 232, the liquid pump 30 maintains the suction state until the mating part 24 moves to the end of the suction section 232 and enters the planar section 233. The mating part 24 makes planar contact with the planar section 233. At this time, the planar section 233 does not drive the mating part 24 to move. Thus, the first transmission member 21 obtains energy storage in the planar section 233 to increase the driving force on the mating part 24 when it turns to the pumping section 231, so that the mating part 24 can drive the pumping component 12 to move more quickly, thereby achieving faster pumping.

[0085] In some embodiments of this application, within a single cycle of the liquid pump 30, the mating part 24 forms a rotational loop with the suction section 232, the planar section 233, and the pumping section 231. In order to more effectively control the high-pressure jet state when the oral care device 100 dispenses water, the rotation direction of the power component 3 is controlled such that the planar section 233 is first driven to engage with the mating part 24, and then the pumping section 231 is driven to engage with the mating part 24, and / or the suction section 232 is first driven to engage with the mating part 24, and then the planar section 233 is driven to engage with the mating part 24.

[0086] For example, after a user finishes rinsing their teeth, a certain amount of liquid may remain in the pump chamber 13 during the next use. Therefore, the power unit 3 is controlled to work, first driving the planar section 233 to engage with the mating part 24, and then driving the pump liquid section 231 to engage with the mating part 24. This allows energy to be stored before the liquid pump 30 drains, enabling the second transmission member 22 to drive the mating part 24 to move at a certain initial speed. This, in turn, causes the second transmission member 22 to drive the pump liquid member 12 to quickly pump out the liquid remaining in the pump chamber 13, ensuring that a low-frequency, high-pressure jet is provided to the user at the start of use to meet the needs of oral cleaning.

[0087] Alternatively, the power assembly 3 can be controlled to work, first driving the liquid suction section 232 to engage with the mating part 24, and then driving the planar section 233 to engage with the mating part 24.

[0088] Alternatively, the power unit 3 can be controlled to operate by first driving the planar section 233 to engage with the mating part 24, then driving the pumping section 231 to engage with the mating part 24, then driving the suction section 232 to engage with the mating part 24, and finally returning to driving the planar section 233 to engage with the mating part 24, thus forming a rotational loop. This cyclical rotation can more effectively save water during a single oral rinsing process and increase the water pressure, thereby improving the cleaning power and effect of the oral care device 100.

[0089] Please continue to refer to Figures 4 to 8 Furthermore, in some embodiments of this application, the first transmission member 21 includes a rotating pressure plate 211 that is pulverizedly connected to the power assembly 3. The rotating pressure plate 211 is provided with an annular platform 23, which includes a pumping section 231 and a suction section 232. The second transmission member 22 includes a swing arm 221 that is rotatably connected to the pump housing 11 and abuts against the pumping component 12. The swing arm 221 has a mating part 24 that pulverizes with the annular platform 23. The mating part 24 forms a pumping mating section with the pumping section 231 and a suction mating section with the suction section 232.

[0090] This configuration allows the rotational motion of the rotating pressure plate 211 to be converted into the swinging motion of the swing arm 221 within the limited space of the housing 10. Since the swing arm 221 drives the pumping component 12 to move in a swinging manner, there is no waiting time between pumping and suction. That is, pumping and suction are continuous. Pumping can be achieved at the end of the suction stroke, and suction can be achieved at the end of the pumping stroke. This compact configuration can greatly improve the performance of the liquid pump 30.

[0091] In some embodiments of this application, the annular platform 23 satisfies at least one of the following conditions:

[0092] The pump section 231 and the suction section 232 transition smoothly;

[0093] The circumferential arc length of the suction section 232 along the rotation direction of the rotating pressure plate 211 is A, and the circumferential arc length of the pumping section 231 along the rotation direction of the rotating pressure plate 211 is B. The ratio of A to B is greater than 1 and not greater than 10.

[0094] In the rotation direction of the rotating pressure plate 211, the protrusion height of the suction section 232 toward the mating part 24 gradually decreases, and the protrusion height of the pumping section 231 toward the mating part 24 gradually increases.

[0095] The annular platform 23 also includes a pressure-holding section 234, which is located between the end of the pump section 231 and the beginning of the suction section 232 along the rotation direction of the rotating pressure plate 211, and the protrusion height of the pressure-holding section 234 toward the mating part 24 is not lower than the protrusion height of the pump section 231.

[0096] Therefore, the beneficial effects brought about by the annular platform 23 are at least as follows:

[0097] The smooth transition between the pumping section 231 and the suction section 232 facilitates smoother and more continuous transmission during contact with the mating part 24, thereby improving the transmission efficiency between the first transmission member 21 and the second transmission member 22. The circumferential arc length A of the suction section 232 is greater than the circumferential arc length B of the pumping section 231, enabling the suction time of the pump 30 to be significantly greater than the pumping time. In the rotation direction of the rotating pressure plate 211, the protrusion height of the suction section 232 towards the mating part 24 gradually decreases, while the protrusion height of the pumping section 231 towards the mating part 24 gradually increases, to ensure that the suction stroke of the pump 30 is a slow suction process and the pumping stroke is a fast pumping process. Through the pressure holding section 234, the pump 30 can maintain a high-pressure jet state continuously between the end of the pumping stroke and the beginning of the suction stroke, thereby improving the stamping reliability and stability of the oral care device 100.

[0098] Please refer to Figures 4 to 9 In some embodiments of this application, the transmission assembly 2 includes a first rolling element 241, which is rotatably disposed on the mating part 24 and rolls with the annular platform 23. By rolling with the annular platform 23, the rotational motion of the rotating pressure plate 211 can be converted into the swinging motion of the swing arm 221. Furthermore, the first rolling element 241 improves the transmission efficiency between the rotating pressure plate 211 and the swing arm 221, ensuring the reliability and stability of the oral care device 100.

[0099] Furthermore, in some embodiments of this application, the annular platform 23 is an arcuate surface adapted to the first rolling element 241; and / or, the rotating pressure plate 211 has an annular track 2111 on the surface opposite to the first rolling element 241, and the transmission assembly 2 further includes a second rolling element 25, which rollably presses against the annular track 2111.

[0100] This configuration further enhances the transmission efficiency and stability between the first rolling element 241 and the rotating pressure plate 211, which is beneficial for improving the operational stability of the liquid pump 30. Furthermore, by having the second rolling element 25 press against the annular track 2111 on the side opposite to the first rolling element 241, the rotating pressure plate 211 is formed with rolling clamps on both sides, ensuring that the rotating pressure plate 211 experiences uniform force when rotating and rolling in contact with the first rolling element 241 and the second rolling element 25. This prevents uneven force distribution that could cause the rotating pressure plate 211 to tilt or misalign with the transmission gears.

[0101] In the thickness direction of the rotating pressure plate 211, the annular track 2111 can be aligned with or offset from the annular platform 23. Preferably, in this embodiment, the annular track 2111 is aligned with the annular platform 23. Moreover, the annular track 2111 is arranged around the rotation center of the rotating pressure plate 211, thereby reducing the overall length of the liquid pump 30 in the design.

[0102] Specifically, both the first rolling element 241 and the second rolling element 25 can be structures such as balls, discs, or miniature bearings. Other structures with rolling properties can also be used, which are not listed here. In this embodiment, both the first rolling element 241 and the second rolling element 25 are balls. The second rolling element 25 is rotatably mounted on the pump cover 112. For example, the pump cover 112 has a mounting opening for placing the second rolling element 25. The second rolling element 25 is rotatably mounted on the mounting opening via a mounting rod. The annular track 2111 has an arc-shaped track surface adapted to the balls.

[0103] Please continue to refer to Figures 4 to 9In some embodiments of this application, the first transmission member 21 further includes a gear disk 212, which is rotatably mounted on the pump housing body 111. The gear disk 212 is coaxially connected to the rotating pressure plate 211 via a connecting shaft. One end of the connecting shaft is rotatably connected to the pump housing body 111, and the other end is rotatably connected to the pump cover 112. The gear disk 212 is also connected to the power assembly 3. The gear disk 212 includes an annular raised surface 26 opposite to the annular platform 23. The gear disk 212 has a transmission boss 2121. The annular raised surface 26 is formed on the transmission boss 2121. The annular raised surface 26 includes an effective raised section 261 corresponding to the liquid suction section 232 and an ineffective raised section 262 corresponding to the liquid pumping section 231. The mating part 24 forms a liquid suction mating section with the liquid pumping section 231 and the effective raised section 261, and forms a liquid pumping mating section with the liquid pumping section 231 and the ineffective raised section 262.

[0104] The power assembly 3 includes a motor 31 and a bevel gear 32. The motor 31 is mounted on the pump housing 11, that is, on the pump housing body 111. The motor 31 is located on the side of the gear disk 212 away from the pumping fluid component 12. The bevel gear 32 is connected to the output shaft of the motor 31 and meshes with the gear disk 212. The motor 31, gear disk 212, and swing arm 221 are arranged along the length of the pump housing body 111. This structural design reduces the thickness of the pump 30, thereby reducing the volume of the pump 30 and making it more compact.

[0105] It is worth noting that a mating rod 242 is provided at the end of the swing arm 221 away from its rotation center. The first rolling element 241 is rotatably sleeved on the mating rod 242, and the mating rod 242 passes through the first rolling element 241. The mating rod 242 forms a mating end at the end away from the swing arm 221, and the mating end makes rolling contact with the annular raised surface 26. When the liquid pump 30 is running, the motor 31 works and drives the gear disk 212 to rotate through the bevel gear. The rotation of the gear disk 212 also drives the rotating pressure plate 211 to rotate synchronously. When the mating end is in rolling contact with the lifting effective section 261, the lifting effective section 261 drives the mating end to move in the direction of the rotating pressure plate 211, so that the swing arm 221 drives the pumping component 12 to perform a suction stroke. Moreover, the circumferential arc length of the lifting effective section 261 along the rotation direction of the transmission boss 2121 is greater than the circumferential arc length of the lifting ineffective section 262 along the rotation direction of the transmission boss 2121. Thus, the mating time of the mating end in rolling contact with the lifting effective section 261 is greater than the time of the mating end in the lifting ineffective section 262, thereby enabling the liquid pump 30 to suck liquid after pumping, in preparation for pumping again.

[0106] In the above embodiment, by setting an annular platform 23 on the side of the rotating pressure plate 211 facing the gear disk 212, the first rolling element 241 is pressed against and moves towards the gear disk 212 during the rotation of the rotating pressure plate 211, thereby driving the swing arm 221 to drive the pumping component 12 to perform the pumping stroke. The annular platform drives the swing arm 221 to drive the pumping component 12 to perform the suction stroke, and the cycle repeats, thereby realizing the continuous operation of the liquid pump 30.

[0107] Please refer to Figure 10 In other embodiments of this application, an annular track 2111 groove can be constructed on the peripheral sidewall of the rotating pressure plate 211, with the mating part 24 extending into the annular track 2111 groove. The annular platform 23 is the groove wall of the annular track 2111 groove facing the pumping component 12. The first rolling element 241 is disposed on the mating part 24, that is, the first rolling element extends into the annular track 2111 groove. With this configuration, when the rotating pressure plate 211 rotates, the annular platform 23 drives the first rolling element 241 to move away from the rotating pressure plate 211, so that the swing arm 221 can drive the pumping component 12 to perform pumping motion.

[0108] Furthermore, the rotary pressure plate 211 includes two rotary sub-pressure plates 2113 coaxially connected by a connecting shaft. Each of the two rotary sub-pressure plates 2113 has an annular groove on its opposite side, and the two annular grooves cooperate to form an annular track 2111 groove. The two rotary sub-pressure plates 2113 facilitate the convenient assembly of the first rolling element 241 into the annular track 2111 groove, thus reducing the assembly difficulty of the liquid pump 30 and improving assembly efficiency.

[0109] Please refer to Figure 11 In order to achieve liquid suction after a single pumping operation, in some embodiments of this application, the liquid pump 30 includes a compression spring 4, which is disposed on the side of the swing arm 221 facing the pumping component 12, for pushing the swing arm 221 to move away from the pumping component 12 to achieve the liquid suction stroke.

[0110] In other embodiments of this application, such as Figure 12 As shown, the liquid pump 30 includes a tension spring 5, which is disposed on the side of the swing arm 221 away from the pump liquid component 12, and is used to pull the swing arm 221 to move away from the pump liquid component 12 to achieve the liquid suction stroke.

[0111] In some other embodiments of this application, such as Figure 13As shown, the liquid pump 30 includes a compression spring 4 and a tension spring 5. The compression spring 4 is located on the side of the swing arm 221 facing the pumping component 12, and is used to push the swing arm 221 to move away from the pumping component 12. The tension spring 5 is located on the side of the swing arm 221 away from the pumping component 12, and is used to pull the swing arm 221 to move away from the pumping component 12. With this configuration, the suction stroke of the liquid pump 30 is stably and reliably achieved by the compression spring 4 and the tension spring 5.

[0112] Please refer to Figures 4 to 9 In some embodiments of this application, the second transmission member 22 includes a swing arm 221 and a pressing part 222. One end of the swing arm 221 is rotatably connected to the pump housing 11, that is, rotatably connected to the pump housing body 111. The swing arm 221 has a mating part 24 that is in transmission cooperation with the first transmission member 21. The mating part 24 is a mating rod 242, and a first rolling element 241 is provided on the mating rod 242. The pressing part 222 is connected to the swing arm 221, such as through a pin. The pressing part 222 is also connected to the pumping component 12. For example, the end of the pressing part 222 facing the pumping component 12 is provided with a locking protrusion, and the pumping component 12 is provided with a locking groove. The locking protrusion and the locking groove engage to achieve connection. Other connection methods can also be used, which are not listed here.

[0113] The midpoint of the stroke of the pressure-retaining part 222 following the swing of the swing arm 221 is connected by a first line, which is perpendicular to the thickness direction of the liquid pump 30. With this configuration, the displacement of the pressure-retaining part 222 along the length direction of the pump housing 11 can be minimized when the swing arm 221 rotates.

[0114] In some embodiments of this application, the swing arm 221 has a relief groove 2211 on the side facing the pump liquid component 12, and the pressing part 222 is at least partially disposed within the relief groove 2211. By providing the relief groove 2211, installation space can be provided for the pressing part 222, the structural space of the swing arm 221 can be used reasonably and effectively, and the compactness between structures can also be improved, thereby effectively reducing the overall thickness of the liquid pump 30 in the structural design.

[0115] In some embodiments of this application, the pumping component 12 includes a diaphragm 121. A mounting groove 1111 communicating with the opening of the pump chamber 13 is provided on the side wall of the pump housing body 111. The diaphragm 121 is disposed within the mounting groove 1111 and seals the opening of the pump chamber 13. The surface of the pressing part 222 that presses against the diaphragm 121 is an arc-shaped surface. This design allows the arc-shaped surface of the pressing part to better fit the outer surface of the diaphragm 121 when the swing arm 221 compresses the diaphragm 121 through the pressing part 222 to achieve pumping. This minimizes the deformation of the diaphragm 121 in all directions, effectively preventing a decrease in pumping strength. Furthermore, reducing deformation of the diaphragm 121 in other directions significantly improves its lifespan and enhances the reliability and stability of the pumping operation of the pump 30.

[0116] It is understood that in other embodiments, the pump component 12 may be a piston component, and the pressure part 222 may be connected to the piston component.

[0117] Please refer to Figures 14 to 17 In some embodiments of this application, the liquid pump 30 further includes a clamping member 6 fixedly installed on the pump housing body 111. The clamping member 6 is arranged around the periphery of the pressing part 222 and is used to press the peripheral edge of the diaphragm 121 against the pump housing 11, that is, to press the edge of the diaphragm 121 against the bottom of the mounting groove 1111, so as to achieve a stable seal at the opening of the pump chamber 13, thereby ensuring that the liquid pump 30 performs the pumping stroke and the suction stroke.

[0118] Understandably, in order to improve the sealing strength of the diaphragm 121 sealing the opening of the pump chamber 13 and to prevent liquid leakage, the bottom of the mounting groove 1111 can be set as an annular groove, and an annular sealing strip is formed on the edge of the diaphragm 121. The annular sealing strip and the annular groove are squeezed together to strengthen the sealing strength of the diaphragm 121 to the opening of the pump chamber 13.

[0119] The clamping element 6 can be a clamping block, which is hollow; the clamping element 6 can also be a sealing ring, or other structures with auxiliary sealing, which will not be described in detail here.

[0120] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0121] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A liquid pump for an oral care device, characterized in that, include: Power components and transmission components; as well as A pump head assembly, comprising a pump housing and a pump liquid component, wherein the pump liquid component and the pump housing together form a pump chamber for containing liquid, and the pump liquid component is connected to the power assembly via the transmission assembly. During a single cycle of the liquid pump, the liquid pump includes a suction stroke and a pumping stroke. When the liquid pump is in the suction stroke, the pump cavity becomes larger, and when the liquid pump is in the pumping stroke, the pump cavity becomes smaller. The transmission assembly includes a first transmission member and a second transmission member. The first transmission member is connected to the power assembly, and the second transmission member is connected to the pump head assembly. A pump-liquid engagement section and a suction engagement section are formed between the first transmission member and the second transmission member. When the pump is in the pump-liquid stroke, the first transmission member and the second transmission member engage in the pump-liquid engagement section. When the pump is in the suction stroke, the first transmission member and the second transmission member engage in the suction engagement section. Wherein, when the motion stroke of the power components is the same, the motion amplitude of the pumping component in the pumping-liquid engagement section is greater than the motion amplitude of the pumping component in the suction-liquid engagement section.

2. The liquid pump as described in claim 1, characterized in that, The power component outputs uniform motion.

3. The liquid pump as described in claim 1, characterized in that, The first transmission component and the second transmission component form an inclined surface fit, the fit slope of the pump-liquid fit section is greater than the fit slope of the suction fit section, and / or, the length of the pump-liquid fit section is less than the length of the suction fit section.

4. The liquid pump as described in claim 3, characterized in that, One of the first transmission component and the second transmission component is provided with a sloping annular platform, and the other is provided with a mating part. The annular platform forms a pumping section and a suction section. The mating part and the pumping section form a pumping mating section, and the mating part and the suction section form a suction mating section.

5. The liquid pump as described in claim 4, characterized in that, The annular platform is formed by connecting the pump section and the suction section end to end.

6. The liquid pump as claimed in claim 4, characterized in that, The annular platform also includes a planar segment, which connects the pumping section and the suction section.

7. The liquid pump according to claim 6, characterized in that, The rotation direction of the power component is controlled such that the planar segment is first driven to engage with the mating part, and then the pumping segment is driven to engage with the mating part, and / or the suction segment is first driven to engage with the mating part, and then the planar segment is driven to engage with the mating part.

8. The liquid pump as claimed in claim 1, characterized in that, The first transmission component includes a rotary pressure plate that is connected to the power assembly. The rotary pressure plate is provided with an annular platform, which includes a pumping section and a suction section. The second transmission component includes a swing arm rotatably connected to the pump housing and abutting against the pumping liquid component. The swing arm has a mating part that is in transmission engagement with the annular platform. The mating part and the pumping liquid section form the pumping liquid mating section, and the mating part and the suction section form the suction liquid mating section.

9. The liquid pump as claimed in claim 8, characterized in that, The annular platform satisfies at least one of the following conditions: The pump section and the suction section transition smoothly; The circumferential arc length of the liquid suction section along the rotation direction of the rotating pressure plate is A, and the circumferential arc length of the liquid pumping section along the rotation direction of the rotating pressure plate is B. The ratio of A to B is greater than 1 and not greater than 10. In the rotation direction of the rotary pressure plate, the protrusion height of the liquid suction section toward the mating part gradually decreases, and the protrusion height of the liquid pumping section toward the mating part gradually increases; The annular platform also includes a pressure-holding section, which is located between the end of the pumping section and the beginning of the suction section along the rotation direction of the rotating pressure plate, and the protrusion height of the pressure-holding section toward the mating part is not less than the protrusion height of the pumping section.

10. The liquid pump as claimed in claim 8, characterized in that, The transmission assembly includes: The first rolling element is rotatably disposed on the mating part and rolls with the annular platform.

11. The liquid pump as claimed in claim 10, characterized in that, The annular platform is an arc-shaped surface adapted to the first rolling element; and / or, The rotating pressure plate has an annular track on the surface opposite to the first rolling element, and the transmission assembly further includes a second rolling element that rolls against the annular track.

12. The liquid pump as claimed in claim 8, characterized in that, The first transmission component further includes: A gear disk is coaxially connected to the rotating pressure plate and is drive-connected to the power assembly. The gear disk includes an annular lifting surface opposite to the annular platform. The annular lifting surface includes an effective lifting section corresponding to the liquid suction section and an ineffective lifting section corresponding to the liquid pumping section. The mating part forms a liquid suction mating section with the liquid pumping section and the effective lifting section, and forms a liquid pumping mating section with the liquid pumping section and the ineffective lifting section.

13. The liquid pump as claimed in claim 12, characterized in that, The power assembly includes: A motor, mounted on the pump housing and located on the side of the gear disc opposite to the pump fluid component; and A bevel gear is connected to the output shaft of the motor and meshes with the gear disk.

14. The liquid pump as claimed in claim 8, characterized in that, The peripheral sidewall of the rotating pressure plate forms an annular track groove, the mating part extends into the annular track groove, and the annular platform is the groove wall of the annular track groove facing the pump liquid component.

15. The liquid pump as claimed in claim 8, characterized in that, Also includes: A compression spring, disposed on the side of the swing arm facing the pump component, is used to push the swing arm to move away from the pump component, thereby achieving the liquid suction stroke; and / or A tension spring is provided on the side of the swing arm away from the pump component, and is used to pull the swing arm to move away from the pump component in order to achieve the liquid suction stroke.

16. The liquid pump as claimed in claim 1, characterized in that, The second transmission component includes: A swing arm, rotatably connected to the pump housing and having a mating part that engages with the first transmission component; and The pressure part is connected to the swing arm and the pump liquid component. The midpoint of the stroke of the pressure part following the swing of the swing arm has a first line connecting it to the swing center of the swing arm. The first line is perpendicular to the thickness direction of the liquid pump.

17. The liquid pump as claimed in claim 16, characterized in that, The swing arm has a clearance groove on the side facing the pump component, and the pressing part is at least partially disposed in the clearance groove.

18. The liquid pump as claimed in claim 16, characterized in that, The pump components include: The diaphragm has an arc-shaped surface on which the pressing part presses against the diaphragm.

19. The liquid pump as claimed in claim 18, characterized in that, Also includes: A clamping element is arranged around the periphery of the pressing part and connected to the pump housing, used to press the peripheral edge of the diaphragm against the pump housing.

20. The liquid pump according to any one of claims 1 to 19, characterized in that, The pump chamber is a straight cylindrical cavity.

21. An oral care device, characterized in that, include: The liquid pump as described in any one of claims 1 to 20; Housing, the liquid pump is disposed within the housing. A water tank, disposed within the housing and communicating with the pump chamber; and The nozzle is disposed inside the housing and communicates with the pump chamber.

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