Oral irrigation device and oral irrigator

Abstract

This application discloses an oral irrigation device and an oral irrigator. The oral irrigation device includes a housing, a motor, a pump mechanism, and a bracket assembly. The motor, the pump mechanism, and the bracket assembly are all located within an internal cavity of the housing. The output shaft of the motor has a first flow path through the output shaft, and the bracket assembly is connected to the inner housing wall of the housing. The pump mechanism includes a liquid inlet, a liquid outlet, and a power end. The pump mechanism can pump liquid from the liquid inlet into the pump chamber of the pump mechanism and discharge it from the liquid outlet. The liquid outlet is integrated with the bracket assembly, which has a second flow path connecting the liquid outlet to the first flow path. The oral irrigation device and oral irrigator provided in this application have the advantages of avoiding resonance, reducing noise, and improving connection stability.

Description

Technical Field

[0001] <Cross - reference to Related Applications> This application claims priority to Chinese Patent Application No. 2024210500741, entitled "Oral Cleaning Device and Oral Cleaner", filed on May 13, 2024. The entire content of the Chinese patent application is incorporated herein by reference. The embodiments of this application relate to the technical field of oral cleaning appliances, and particularly to oral cleaning devices and oral cleaners.

Background Art

[0002] As people pay more attention to oral care, electric toothbrushes and water flossers have gradually become common oral care tools at home. An electric toothbrush uses a motor to vibrate the brush head at a high frequency, instantly decomposing toothpaste into fine bubbles and deeply cleaning the gaps between teeth. A water flosser discharges a high - speed water column with a certain pressure by a water pump, and utilizes the impact force of the high - speed water column to clean teeth and interdental spaces.

[0003] Related oral cleaners can combine the toothbrush function and the tooth - rinsing function. Specifically, a related oral cleaner may include a device body, a toothbrush, a motor, a water pump, and a water tank. The toothbrush is arranged on the head of the device body, and the motor, water pump, and water tank are arranged inside the device body. The motor shaft of the motor has a flow path for water to flow, and the flow path communicates with the water tank. The toothbrush has a cavity and an outlet communicating with the cavity. The motor shaft of the motor passes through the cavity, and the flow path of the motor shaft of the motor communicates with the outlet. Thereby, the liquid in the water tank is ejected from the outlet through the flow path under the action of the water pump.

[0004] [[ID=(23]] However, since both the motor and the water pump generate vibrations during operation, the connection reliability of the pipeline connecting the water pump and the flow path of the output shaft is low and it is very easy to fall off.

Summary of the Invention

[0005] The objective of the embodiments of this application is to provide an oral irrigation device and oral irrigator that can solve the problem of low reliability and high susceptibility to disconnection of the pipeline connection between the water pump and the flow path of the output shaft.

[0006] To achieve the above objective, one embodiment of the present application provides an oral irrigation device. This oral irrigation device includes a housing, a motor, a pump mechanism, and a bracket assembly. The motor, the pump mechanism, and the bracket assembly are all located within an internal cavity of the housing, the output shaft of the motor has a first flow path through the output shaft, and the bracket assembly is connected to the inner housing wall of the housing. The pump mechanism includes a liquid inlet, a liquid outlet, and a power end, and the pump mechanism can pump liquid from the liquid inlet into the pump chamber of the pump mechanism and discharge it from the liquid outlet. The liquid outlet is integrated with the bracket assembly, and the bracket assembly has a second flow path connecting the liquid outlet to the first flow path.

[0007] Embodiments of this application further provide an oral irrigator, which includes a cleaning accessory and the oral irrigation device described above. The cleaning accessory has a cavity and an outlet communicating with the cavity. The output shaft of the motor of the oral irrigation device is connected to the cleaning accessory and drives the cleaning accessory to perform displacement motion. The first flow path of the output shaft communicates with the cavity of the cleaning accessory. The pump mechanism outputs a water flow shock through the outlet.

[0008] In summary, the oral irrigation device and oral irrigator provided by the embodiments of this application have the advantage of avoiding resonance, reducing noise, and improving connection stability compared to related technologies in which the water pump is independent and connection stability is poor. This is achieved by disassembling the pump mechanism into a power end, a liquid inlet end, and a liquid outlet end, integrating the liquid outlet end into a bracket assembly, and using the second flow path of the bracket assembly to allow the liquid flowing out from the liquid outlet end of the pump mechanism into the first flow path. [Brief explanation of the drawing]

[0009] To further describe the technical means of the embodiments of this application, the drawings necessary for describing the embodiments are briefly explained below. Naturally, the drawings in the following description are only a few embodiments of this application, and those skilled in the art can obtain other drawings based on these without any creative work. [Figure 1] This is a schematic diagram of a related oral irrigator. [Figure 2] This is a schematic diagram of an oral irrigator provided by an embodiment of this application. [Figure 3] Figure 2 is a longitudinal cross-sectional view of the oral irrigator shown. [Figure 4] Figure 2 is a partial view of another longitudinal cross-section of the oral irrigator shown. [Figure 5] This is an internal layout diagram of the oral irrigation device provided by the embodiment of this application. [Figure 6] This is another internal layout diagram of the oral irrigation device provided by the embodiments of this application. [Figure 7] This is a cross-sectional view of the partition member shown in Figure 4. [Figure 8] This is a partial cross-sectional view of the airflow groove of the housing provided by the embodiment of this application. [Figure 9] This is a partial cross-sectional view of an airflow groove in another housing provided by an embodiment of this application. [Figure 10]This is a partial cross-sectional view of a non-airflow groove in a housing provided by an embodiment of this application. [Figure 11] This is a schematic diagram of the lid and third sealing ring provided by the embodiment of this application. [Figure 12] This is an exploded view of the oral irrigator provided by the embodiment of this application. [Figure 13] Figure 12 is an exploded view of the motor, connecting members, mounting members, and circuit board shown. [Figure 14] Figure 13 is a three-dimensional assembly diagram of the mounting members, connecting members, and pump mechanism shown. [Figure 15] This is an exploded view of the connecting member, mounting member, and motor of the oral irrigator provided by the embodiment of this application. [Figure 16] Figure 15 is an exploded view of the pump mechanism, mounting members, and connecting members. [Figure 17] This is a schematic diagram of a part of Figure 3. [Figure 18] This is an exploded view of a connecting member provided by an embodiment of this application. [Explanation of symbols]

[0010] 1000, Oral irrigation device; 100, Housing; 110, Power cavity; 120, Liquid storage cavity; 130, Housing; 131, Second mating surface; 140, Lid; 141, Third sealing groove; 142, Third sealing cavity; 143, Airflow groove; 144, Flow guide groove; 145, First mating surface; 160, Upper end; 170, Lower end; 180, Micro passage; 190, Assembly gap; 200, motor; 210, output shaft; 211, first flow path; 220, motor body; 300, pump mechanism; 310, liquid inlet end; 311, first valve section; 312, first end cap section; 320, liquid outlet end; 321, second valve section; 322, second end cap section; 330, power end; 331, pump casing; 332, piston; 333, drive member; 400, Connection member; 410, Second flow path; 411, First flow path segment; 412, Second flow path segment; 4121, First arc segment; 4122, Second arc segment; 420, Third flow path; 430, First connection part; 431, Direction-changing cavity; 432, First inner arc surface; 440, Second connection part; 441, Second inner arc surface; 442, Cover plate segment; 443, Protrusion segment; 444, Barrier plate segment; 450, Mounting groove; 500, Mounting member; 510, First mounting part; 520, Second mounting part; 530, Through hole; 600, Partition member; 610, Accommodation cavity; 620, Accommodation opening; 630, First part; 640, Second part; 650, Third part; 651, Fourth flow path; 660, Fourth part; 670, Fifth part; 680, Communication hole; 710, Energy source; 720, Circuit board; 810, First sealing member; 820, Second sealing member; 830, Third sealing member; 840, Fourth sealing member; 911, First vibration reduction member; 912, Second vibration reduction member; 913, Third vibration reduction member; 914, Fourth vibration reduction member; 921, First fastening member; 922, Second fastening member; 923, Third fastening member; 2000, Cleaning accessory; 2100, Brush body; 2200, Cavity; 2300, Outlet

Mode for Carrying Out the Invention

[0011] FIG. 1 is a schematic diagram of a related oral cleaner. Referring to FIG. 1, the device body of the related oral cleaner is of an elongated type. The water tank is arranged on the right side of the device body, and the motor, water pump and battery are arranged on the left side of the device body. The longitudinal length of the water tank is approximately equal to the longitudinal length of the device body. Due to the small diameter of the water tank, it is difficult for the user to clean the inner wall of the water tank. Also, the water pump is arranged at the middle left position of the device body, and since the input end a and the output end b of the water pump are arranged at the upper part of the water pump, the longitudinal distance between the input end a of the water pump and the bottom of the water tank becomes too long. As a result, the water path between the two becomes relatively long, which is disadvantageous for the water pump to suck the liquid in the water tank.

[0012] To address the above technical problems, the inventor of the present application considered arranging the water tank at the lower part of the device body and arranging the motor, water pump, etc. above the water tank, thereby shortening the longitudinal length of the water tank and facilitating the cleaning of the water tank. Also, by reducing the lateral width of the device body, it is possible to facilitate gripping by the user. However, such an arrangement reduces the volume of the water tank. The inventor of the present application attempted to shorten the longitudinal length of the water pump in order to make the volume of the water tank as large as possible. Specifically, since the input end and output end of the water pump are arranged above the water pump, it can be converted to arranging the input end and output end of the water pump at the lower side of the water pump. In this way, not only is the longitudinal depth of the sunken water tank increased, but also the distance between the input end of the water pump and the bottom of the water tank is shortened, improving the suction effect of the water pump. Also, by arranging a direction-changing water channel using the space on the side of the water pump, the output end of the water pump arranged at the lower side and the flow path of the output shaft of the motor arranged above can be communicated. In this way, while ensuring the appearance of the slender device body, by reasonably arranging the positions of the water tank, water pump, and motor, not only does the volume of the sunken water tank increase, but also the suction effect of the pump is improved.

[0013] To further clarify the objectives, technical solutions, and advantages of the embodiments of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below while referring to the accompanying drawings of the embodiments of the present application. Of course, the embodiments described here are only a part and not all of the embodiments of the present application.

[0014] All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative work should be included within the protection scope of the present application. If there is no contradiction, the features in the following embodiments and examples can be combined with each other.

[0015] Figure 2 is a schematic diagram of an oral irrigator provided by an embodiment of the present application, and Figure 3 is a longitudinal cross-sectional view of one of the oral irrigators shown in Figure 2. Referring to Figures 2 and 3, the oral irrigator provided by an embodiment of the present application may include an oral irrigation device 1000 and a cleaning accessory 2000. Here, the cleaning accessory 2000 may be a component capable of cleaning the oral cavity, such as a toothbrush head, a flushing head, or a flushing-brushing head. Figure 3 illustrates that the cleaning accessory 2000 is a flushing-brushing head. The cleaning accessory may have a cavity and an outlet communicating with the cavity. Specifically, the cleaning accessory 2000 may include a brush body 2100, which may have a cavity 2200 and an outlet 2300 communicating with the cavity 2200.

[0016] Continuing to refer to Figure 3, the oral irrigator 1000 may include a housing 100, a power assembly, and a bracket assembly. The bracket assembly may include a connecting member 400. Here, to facilitate gripping by the user, the shape of the housing 100 may be an elongated cylinder. The cross-sectional shape of the housing 100 may be circular or non-circular (e.g., D-shaped, elliptical, polygonal, etc.). The first axis is the center line of the housing 100. That is, the center point of each cross-section of the housing 100 may all be on the first axis. The housing 100 may extend along the first axial direction (e.g., the vertical direction in Figure 3), and the housing 100 may have an upper end 160 and a lower end 170 that are positioned opposite each other along the first axial direction. The inside of the housing 100 may be hollow, thereby allowing the housing 100 to have an internal cavity.

[0017] The power assembly may be located within an internal cavity of the housing 100 and may include a motor 200 and a pump mechanism 300. To maintain the elongated shape of the housing 100, the motor 200 and the pump mechanism 300 may be arranged sequentially along a first axial direction. The motor 200 may be located closer to the upper end 160 of the housing 100 than the pump mechanism 300, such that the output shaft 210 of the motor 200 penetrates the outside of the upper end 160 of the housing 100 and is connected to a cleaning accessory 2000 (e.g., a toothbrush head, a flushing / brushing integrated head, or other accessory with brush bristles) to move the cleaning accessory 2000 (as shown in Figure 3, the motor 200 is located above the pump mechanism 300). The motor 200 may be a rotary motor 200 capable of rotating the cleaning accessory 2000. Alternatively, the motor 200 may be a vibrating motor 200 (e.g., an ultrasonic motor 200) capable of oscillating the cleaning accessory 2000 at a high frequency. The motor 200 may include a motor body 220 and an output shaft 210. The axis of the output shaft 210 may coincide with or be spaced apart from the first axis of the housing 100. The output shaft 210 may be positioned to pass through the motor body 220 along its axial direction. The axial upper end 160 of the output shaft 210 passes through the upper end 160 of the motor body 220 and is connected to the cleaning accessory 2000, which can move the cleaning accessory 2000.

[0018] The output shaft 210 may have a first flow path 211 that penetrates the output shaft 210 along its axial direction. The internal cavity of the housing 100 may include a liquid storage cavity body 120. The liquid storage cavity body 120 can be used to store liquid. The bracket assembly may be connected to the inner housing wall of the housing 100. Figure 4 is a partial view of another longitudinal section of the oral irrigator shown in Figure 2. Referring to Figures 3 and 4, the bracket assembly, for example, the connecting member 400, may have a second flow path 410 and a third flow path 420. Note that the third flow path 420 and the second flow path 410 are not in the same longitudinal section, so the second flow path 410 is visible in the cross-section shown in Figure 3, and the third flow path 420 is visible in Figure 4.

[0019] The pump mechanism 300 may include a liquid inlet end 310, a liquid outlet end 320, and a power end 330. The pump mechanism 300 can pump liquid and send it from the liquid inlet end 310 into the pump chamber of the pump mechanism and discharge it from the liquid outlet end 320. The third flow path 420 can connect the liquid storage cavity 120 to the liquid inlet end 310 of the pump mechanism 300, and the second flow path 410 can connect the liquid outlet end 320 of the pump mechanism 300 to the first flow path 211. If the cleaning accessory 2000 is an accessory such as a flushing head or a flushing / brushing integrated head that has a cavity 2200 and an outlet 2300 communicating with the cavity 2200 and can eject liquid from the outlet 2300, then the first flow path 211 of the output shaft 210 can communicate with the outlet 2300 through the cavity 2200 of the cleaning accessory 2000. The arrows in Figures 3 and 4 indicate the direction of liquid flow. Referring to the arrows in Figures 3 and 4, when the oral irrigator performs its flushing function, the pump mechanism 300 guides the liquid in the liquid storage cavity 120 through the third channel 420, the liquid inlet end 310 of the pump mechanism 300, into the pump chamber of the pump mechanism 300, then through the liquid outlet 320, the second channel 410, into the first channel 211, and then through the cavity 2200 of the cleaning accessory 2000, and out through the outlet 2300.

[0020] Specifically, the output shaft 210 of the motor 200 of the oral irrigation device 1000 is connected to the cleaning accessory 2000, which can drive the cleaning accessory 2000 to perform displacement motion, and the first flow path 211 of the output shaft 210 can communicate with the cavity of the cleaning accessory 2000. The pump mechanism 300 can output a water flow impact through the outlet 2300.

[0021] Referring to Figure 3, the power assembly (motor 200 and pump mechanism 300) and the liquid storage cavity 120 may be arranged sequentially along the first axis to shorten the longitudinal length of the liquid storage cavity 120 and facilitate cleaning of the water tank by the user (as shown in Figure 1, the power assembly is located above the liquid storage cavity 120). The lateral width of the housing 100 may also be reduced to facilitate gripping by the user. Here, the pump mechanism 300 may be positioned closer to the liquid storage cavity 120 than the motor 200 to facilitate the pump mechanism 300 in drawing liquid from the liquid storage cavity 120.

[0022] To increase the vertical height of the liquid storage cavity 120 and thereby increase its volume, as shown in Figures 3 and 4, the liquid inlet 310 and liquid outlet 320 of the pump mechanism 300 may optionally be located on one side of the pump mechanism 300 along the second axial direction, where the second axial direction intersects the first axial direction. In this way, the length of the pump mechanism 300 along the first axial direction is shortened, the length of the liquid storage cavity 120 along the first axial direction is increased, and the volume of the liquid storage cavity 120 is further increased. Furthermore, the second axial direction is perpendicular to the first axial direction. As shown in Figures 3 and 4, the first axial direction is vertical, the second axial direction is horizontal, and the liquid inlet 310 and liquid outlet 320 of the pump mechanism 300 are both located on the left side of the pump mechanism 300.

[0023] In order to make effective use of the lateral space of the pump mechanism 300, the connecting member 400 may also be connected to one side of the pump mechanism 300 along the second axial direction (for example, the left side in Figures 3 and 4) such that the third flow path 420 and at least a portion of the second flow path 410 are located on one side of the pump mechanism 300 along the second axial direction (for example, the left side in Figures 3 and 4). The connection point between the connecting member 400 and the liquid storage cavity 120 may be located on one side of the pump mechanism 300 along the second axial direction (for example, the left side in Figure 4) to shorten the distance between the liquid inlet end 310 of the pump mechanism 300 and the liquid storage cavity 120, in order to facilitate the pump mechanism 300 from drawing liquid from the liquid storage cavity 120.

[0024] Furthermore, in the first axial direction, the liquid inlet end 310 and the liquid outlet end 320 of the pump mechanism 300 may be closer to the liquid storage cavity 120. That is, the liquid inlet end 310 and the liquid outlet end 320 of the pump mechanism 300 are positioned at one end closer to the liquid storage cavity along the first axial direction of the pump mechanism 300. In this way, the distance between the liquid inlet end 310 of the pump mechanism 300 and the bottom of the liquid storage cavity 120 is shortened, making it easier for the pump mechanism 300 to suck the liquid from the liquid storage cavity 120. Also, the distance between the liquid outlet end 320 of the pump mechanism 300 and the first flow path 211 is increased, reducing the impact force on the output shaft 210 of the motor 200 by the liquid at the liquid outlet end 320 of the pump mechanism 300, and improving connection stability.

[0025] The mouthwash device 1000 provided by the embodiments of this application may further include an energy source 710. The energy source 710 may be a device capable of supplying electrical energy to the motor 200, the pump mechanism 300, and the electrical devices on the circuit board 720, such as a rechargeable battery or storage battery. In order to maintain the elongated shape of the mouthwash device 1000, the energy source 710 may be located on the side away from the motor 200 along the first axial direction of the pump mechanism 300 (for example, the lower side in Figures 3 and 4), and at least a portion of the energy source 710 is positioned alongside at least a portion of the liquid storage cavity 120. That is, the energy source 710 and the liquid storage cavity 120 together occupy the lower end 170 of the housing 100.

[0026] Figure 5 is an internal layout diagram of the oral irrigation device 1000 provided by an embodiment of the present application. Referring to Figures 3 to 5, exemplary, the liquid storage cavity body 120 may enclose the energy source 710 on one side in the first axial direction. For example, in Figure 5, the liquid storage cavity body 120 may enclose the outer surface and bottom surface of the energy source 710. That is, in the first axial direction, the energy source 710 may have opposing top and bottom surfaces, and the housing 100 may have opposing inner top and inner bottom surfaces. There is a gap between the bottom surface of the energy source 710 and the inner bottom surface of the housing 100, and at least a portion of the liquid storage cavity is located between the bottom surface of the energy source 710 and the inner bottom surface of the housing 100. In other words, the liquid storage cavity body 120 may be formed in a "concave" shape, and the energy source 710 may be located in the concave part of the concave liquid storage cavity body 120. Alternatively, the liquid storage cavity 120 may enclose only the outer surface of the energy source 710. In other words, the bottom surface of the energy source 710 abuts against the inner bottom surface of the housing 100.

[0027] Figure 6 is another internal layout diagram of the oral irrigation device 1000 provided by an embodiment of the present application. Referring to Figure 6, as another example, a space for an energy source 710 is formed between the liquid storage cavity body 120 and the inner housing wall of the housing 100. For example, in Figure 6, the liquid storage cavity body 120 may enclose the bottom surface of the energy source 710 and at least a portion of the outer surface of the energy source 710. That is, there is a gap between the bottom surface of the energy source 710 and the inner bottom surface of the housing 100, and at least a portion of the liquid storage cavity is located between the bottom surface of the energy source 710 and the inner bottom surface of the housing 100. In other words, the liquid storage cavity body 120 may be formed in an L shape, and the energy source 710 may be located in a notch of the L-shaped liquid storage cavity body 120. Alternatively, the liquid storage cavity body 120 may enclose only the outer surface of the energy source 710. In other words, the bottom surface of the energy source 710 is in contact with the inner bottom surface of the housing 100.

[0028] The liquid storage cavity 120 may be formed by a housing 130 independent of the housing 100. The liquid storage cavity 120 may be detachably connected to the housing 100 to allow the user to remove the liquid storage cavity 120 from the housing 100 for cleaning. Alternatively, the liquid storage cavity 120 may be formed by the inner housing wall of the housing 100 and a partition member 600. Specifically, referring to Figures 5 and 6, the oral irrigator 1000 provided by the embodiment of this application may further include a partition member 600. The partition member 600 may be located within the internal cavity of the housing 100, and may partition the internal cavity of the housing 100 into a power cavity 110 and the liquid storage cavity 120. Here, the motor 200, the pump mechanism 300 and the energy source 710 may all be located within the power cavity 110. As shown in Figures 5 and 6, the partition member 600 can be formed to surround the power cavity body 110 together with the inner housing wall of the housing 100 located on one side along the first axial direction of the partition member 600 (for example, the left side in Figures 5 and 6), and the partition member 600 can be formed to surround the liquid storage cavity body 120 together with the inner housing wall of the housing 100 located on the other side along the first axial direction of the partition member 600 (for example, the right side in Figures 5 and 6).

[0029] For example, referring to Figures 4 and 7, the partition member 600 is detachably connected to the housing 100, so that the user can remove the partition member 600 from the housing 100 for cleaning. For sealing purposes, a first sealing member 810 may be filled between the partition member 600 and the housing 100. For example, a first sealing groove may be provided on the outer wall of the partition member 600, and a first sealing cavity may be formed between the first sealing groove and the inner housing wall of the housing 100. The first sealing member 810 may be a first sealing ring. The first sealing ring may be sealed within the first sealing cavity to prevent liquid seepage. The partition member 600 may also be detachably connected to the housing 100 by an engagement connection. And / or, the partition member 600 is fastened to a connecting member 400 (or a mounting member 500 described later) by fastening members such as bolts. Furthermore, the connection points of the fastening members may be waterproofed. For example, referring to Figure 12, the partition member 600 may have a blind hole, and the connecting member 400 or mounting member 500 may be provided with a screw hole. The first fastening member 921 may be positioned through the blind hole of the partition member 600 and screwed into a screw hole provided in the connecting member 400 or mounting member 500.

[0030] As another example, the partition member 600 and the housing 100 may be a single piece formed by an integral molding process to facilitate assembly and improve connection strength.

[0031] Figure 7 is a cross-sectional view of the partition member 600 shown in Figure 4. Referring to Figures 4 and 7, in order to connect the liquid inlet end 310 of the pump mechanism 300 provided in the power cavity body 110 to the liquid storage cavity body 120, the partition member 600 may have a communication hole 680 that connects the power cavity body 110 and the liquid storage cavity body 120, and the third flow path 420 of the connecting member 400 may communicate with the liquid storage cavity body 120 through the communication hole 680. To shorten the distance between the liquid inlet end 310 of the pump mechanism 300 and the liquid storage cavity body 120, the communication hole 680 may optionally be located on one side (for example, the left side in Figure 4) along the second axial direction of the pump mechanism 300.

[0032] To avoid liquid seepage, the connecting member 400 and the communication hole 680 may optionally be sealed by a second sealing member 820. Specifically, the outer wall of the connecting member 400 may have a second sealing groove, and a second sealing cavity may be formed between the second sealing groove and the inner wall of the communication hole 680. The second sealing member 820 may be a second sealing ring, which may be sealed within the second sealing cavity.

[0033] The partition member 600 may have a receiving opening 620 and a receiving cavity 610 for housing the energy source 710. The receiving opening 620 may be located on one side of the receiving cavity 610 facing the pump mechanism 300 along the first axial direction (for example, the upper side in Figures 4 and 7). Here, the partition member 600 may independently form the receiving opening 620 and the receiving cavity 610, as shown in Figures 3 to 5 and 7. Alternatively, the partition member 600 may form the receiving opening 620 and the receiving cavity 610 together with the inner housing wall of the housing 100, as shown in Figure 6.

[0034] In one possible structure of the partition member 600, referring to Figures 3 to 5 and 7, if the liquid storage cavity body 120 encloses the energy source 710 on one side along the first axial direction, the partition member 600 may include a first portion 630 and a second portion 640 that communicate sequentially along the first axial direction, and the first portion 630 may be closer to the pump mechanism 300 than the second portion 640. The inner wall of the first portion 630 may form part of the housing opening 620 and the housing cavity 610, and the inner wall of the second portion 640 may form another portion of the housing cavity 610. The shape of the outer wall of the first portion 630 may conform to the shape of the inner housing wall of the housing 100, and the outer wall of the first portion 630 may abut against the inner housing wall of the housing 100, and a communication hole 680 may be formed in the first portion 630. At least a portion of the liquid storage cavity 120 may be limited and formed between the outer wall of the second portion 640 and the inner housing wall of the housing 100.

[0035] For example, the liquid storage cavity 120 may be provided with a fourth flow path 651 that connects the bottom of the liquid storage cavity 120 to the communication hole 680. The fourth flow path 651 may be formed by an independent tube. Alternatively, the fourth flow path 651 may be formed by a partition member 600 to facilitate assembly and improve the connection strength between the fourth flow path 651 and the communication hole 680. Specifically, referring to Figure 4, the partition member 600 may further include a third portion 650, which is integrally connected to the first portion 630. The third portion 650 may have a fourth flow path 651 through which liquid flows. The fourth flow path 651 can connect the communication hole 680 to the side of the liquid storage cavity 120 away from the pump mechanism 300. Furthermore, the fourth channel 651 may extend along the first axial direction, thereby shortening the length of the waterway between the liquid inlet end 310 of the pump mechanism 300 and the side of the liquid storage cavity 120 away from the pump mechanism 300.

[0036] In another possible structure of the partition member 600, referring to Figure 6, if a space for arranging the energy source 710 is formed between the liquid storage cavity 120 and the inner housing wall of the housing 100, the partition member 600 may include a fourth portion 660, which may extend along a first axial direction. At least a portion of the liquid storage cavity 120 may be formed between the fourth portion 660 and a portion of the inner housing wall of the housing 100, and at least a portion of the containment cavity 610 may be formed between the fourth portion 660 and another portion of the inner housing wall of the housing 100.

[0037] Furthermore, the partition member 600 may further include a fifth portion 670. The fifth portion 670 may be connected between the fourth portion 660 and the inner housing wall of the housing 100, and the fifth portion 670 may provide first axial support to the energy source 710.

[0038] Referring to Figure 1, the water tank of the relevant oral irrigator is often provided with a vent. This vent allows airflow to enter the water tank when the pump mechanism 300 draws water, filling the space where the liquid has been lost and ensuring that the internal cavity of the water tank communicates with the outside. The relevant vent is exposed to the outside, affecting the aesthetics of the oral irrigator 1000. Also, when gripping the device body, the vent may be blocked, potentially affecting the operation of the water pump. Furthermore, if the vent is designed inside the device body, it is necessary to add a ventilation pipe to the internal cavity space, increasing the difficulty of the design.

[0039] To address the technical problems described above, the inventors of this application devised a method for disassembling the main body of the device into two parts that can be nested together, and using the assembly gap between the two parts to connect the internal cavity of the water tank to the outside. In this way, the exterior of the device can be made without holes. However, it is difficult to control the assembly gap with relative precision, and among products on the same production line, some have a relatively large assembly gap, posing a high risk of liquid leakage, while others have a relatively small assembly gap, making it difficult for outside air to pass through. Based on this, the inventors of this application devised a method for forming a micro-passage between the mating surfaces of these two parts. By setting the cross-section of the micro-passage to be relatively small, it is possible to allow gas flow while preventing liquid leakage. The assembly gap can be made slightly larger to allow outside air to pass through easily and to prevent large differences in the assembly gap among products on the same production line.

[0040] Specifically, referring to Figure 3, the housing 100 may include a housing body 130 and a lid 140. The housing body 130 may include a top wall and side walls. The side walls of the housing body 130 may be connected to the outer circumference of the top wall of the housing body 130 and may extend along the first axial direction. The top wall of the housing body 130 may have a through hole 530 for the output shaft 210 of the motor 200 to pass through. The housing body 130 may have an opening. The opening may be located at one end of the housing body 130 along the first axial direction, as shown in Figure 3, and may be located opposite the top wall of the housing body 130. Alternatively, the opening may be located in the side wall of the housing body 130.

[0041] The lid 140 may seal and cover the opening of the housing 130, thereby allowing the housing 130 and the lid 140 to surround the internal cavity of the housing. The lid 140 and the housing 130 can be nested together along a predetermined direction. This predetermined direction may be a first axial direction or may intersect the first axial direction.

[0042] Specifically, the lid 140 may include a bottom wall and side walls. The side walls of the lid 140 may be connected to the outer circumference of the bottom wall of the lid 140 and may extend along a certain direction. The side walls and bottom wall of the lid 140 can form an internal cavity of the lid 140 that opens at one end. The side walls of the lid 140 may be fitted inside the internal cavity of the housing 130, as shown in Figure 3. Alternatively, the side walls of the lid 140 may be fitted outside the housing 130. Furthermore, the lid 140 and the housing 130 may form at least a portion of the liquid storage cavity 120.

[0043] Referring to Figures 8 and 9, the lid 140 may have a first mating surface 145, and the housing body 130 may have a second mating surface 131 positioned opposite the first mating surface 145. An assembly gap 190 may be formed between the first mating surface 145 and the second mating surface 131. For example, in Figure 3, the lid 140 may be fitted inside the internal cavity of the housing body 130, and the outer surface of the lid 140 fitted inside the housing body 130 may be the first mating surface 145, and the outer surface of the housing body 130 fitted outside the lid 140 may be the second mating surface 131. Furthermore, for example, the lid 140 may be fitted outside the housing body 130, and the inner surface of the lid 140 may be the first mating surface 145, and the outer surface of the housing body 130 may be the second mating surface 131. In this way, the gas flow passage can be hidden inside the device to avoid it becoming blocked, which has the advantages of easy ventilation and the elimination of visible holes.

[0044] Furthermore, a micro-passage 180 may be formed between the housing 130 and the lid 140. The micro-passage 180 allows gas to pass along the first axial direction and prevents liquid from flowing out, and the micro-passage 180 communicates the liquid storage cavity 120 with the outside using the assembly gap 190 between the housing 130 and the lid 140. Optionally, in a preset direction, the liquid storage cavity 120 may be higher than the micro-passage 180. This may result in the water level in the liquid storage cavity 120 being higher than the micro-passage 180.

[0045] Specifically, the liquid level in the liquid storage cavity 120 may be higher than that of the micro-passage 180, thereby creating a pressure difference between the external pressure (1 atmosphere) and the pressure in the liquid storage cavity 120 (less than 1 atmosphere). Under the action of this pressure difference, gas flow can be enabled and liquid leakage can be prevented, thereby achieving the objectives of gas passage and leakage prevention. It should be noted that the phrase "preventing liquid leakage" can be understood in a broad sense, meaning that when the oral irrigation device 1000 is stationary or being held normally by the user, the micro-passage 180 can prevent liquid leakage. If the user shakes it with great force, the surface tension will be broken, affecting the air pressure, and liquid may splash and leak from the micro-passage 180.

[0046] The method for forming the micro-passage 180 will be described below with reference to Figures 8 and 9. Specifically, a third sealing groove 141 may be provided on one side wall of the housing body 130 and the lid body 140, and the third sealing groove 141 may have an opening facing outwards. The other side wall of the housing body 130 and the lid body 140 may be formed together with the third sealing groove 141 to surround a third sealing cavity 142, and the third sealing cavity 142 may communicate with the liquid storage cavity body 120 and the outside through an assembly gap 190. An airflow groove 143 may be provided at the bottom of the third sealing groove 141, and the airflow groove 143 may have an opening facing the third sealing cavity 142.

[0047] For example, in Figures 8 and 9, the lid 140 is fitted inside the internal cavity of the housing 130, and a third sealing groove 141 may be provided in the side wall of the lid 140, and the third sealing groove 141 may have an opening facing outwards. The side wall of the housing 130 and the third sealing groove 141 may together form surrounding the third sealing cavity 142. Alternatively, for example, the lid 140 may be fitted on the outside of the housing 130, and a third sealing groove 141 may be provided in the side wall of the housing 130, and the third sealing groove 141 may have an opening facing outwards. The side wall of the lid 140 and the third sealing groove 141 may together form surrounding the third sealing cavity 142.

[0048] Figure 10 is a cross-sectional view of a non-airflow groove 143 of a housing 100 provided by an embodiment of the present application. Referring to Figure 10, the housing 100 may further include a third sealing member 830, which may be sandwiched between the inner wall of the other of the housing body 130 and the lid body 140 and the groove bottom of the third sealing groove 141. Here, the cross-sectional shape of the third sealing member 830 may be circular or polygonal. The embodiments of the present application do not specifically limit the cross-sectional shape of the third sealing member 830.

[0049] Continuing to refer to Figures 8 and 9, a micropassage 180 is formed between the surface of the third sealing member 830 adjacent to the airflow groove 143 and the airflow groove 143. In this way, the sealing cavity is sealed by the third sealing member 830 in the non-airflow groove 143. The airflow groove 143 has a micropassage 180 formed therein that prevents the flow of liquid, allowing gas to flow. Since the machining depth of the airflow groove 143 is generally relatively precise, the size of the formed micropassage 180 can be precisely controlled. Thus, the housing 100 provided by the embodiment of this application not only achieves ventilation and liquid prevention but also has a high yield. Furthermore, when the pump mechanism 300 sucks liquid, the third sealing member 830 is crushed and deformed, which increases the assembly gap and further promotes air intake.

[0050] The liquid level difference h formed by the highest liquid level in the liquid storage cavity 120 and the height of the horizontal plane where the airflow groove 143 is located satisfies the following condition: 0 < ρ * g * h ≤ 30% * Po. Here, ρ represents the density of air, g represents the density of liquid, and Po represents 1 atmosphere.

[0051] Specifically, the larger the difference between the liquid pressure inside the liquid storage cavity 120 and the external atmospheric pressure, the easier it is for gas to flow into the liquid storage cavity 120 from the outside, thus better preventing liquid leakage. Conversely, the smaller the difference between the liquid pressure inside the liquid storage cavity 120 and the external atmospheric pressure, the more difficult it is for gas to flow into the liquid storage cavity 120 from the outside, potentially leading to liquid leakage. According to the inventor's verification in this application, when the liquid level difference h satisfies the above conditions, the micro-passage 180 can allow gas to pass through and prevent liquid leakage.

[0052] To further prevent leakage, the liquid level difference h may satisfy 0 < ρ*g*h ≤ 20%*Po. To further prevent leakage, the liquid level difference h may satisfy 0 < ρ*g*h ≤ 10%*Po. For example, ρ*g*h ≤ 10%*Po, ρ*g*h ≤ 5%*Po, and ρ*g*h ≤ 1%*Po.

[0053] Furthermore, the depth range of the airflow groove 143 can be set to 0.1 mm to 0.4 mm in order to allow gas to pass through while simultaneously preventing liquid from passing through. For example, the depth of the airflow groove 143 can be 0.1 mm, 0.3 mm, 0.4 mm, etc. Furthermore, the depth range of the airflow groove 143 can be set to 0.25 mm to 0.34 mm in order to further facilitate gas passage and liquid blocking. For example, the depth of the airflow groove 143 can be 0.25 mm, 0.30 mm, 0.34 mm, etc.

[0054] In a predetermined direction, the third sealing groove 141 may have two groove side walls arranged opposite each other, as shown in Figures 8 and 9. The groove bottom wall of the third sealing groove 141 may be connected between the two groove side walls. Alternatively, the third sealing groove 141 may have a first groove side wall, which may be used to support one side of the third sealing member 830.

[0055] If the third sealing member 830 has two groove side walls, in order to allow the inflow and outflow of gas into the third sealing cavity 142, for example, referring to Figure 8, the height of the third sealing member 830 may be lower than the height of the groove bottom wall in a predetermined direction. Thus, a passage communicating with the micropassage 180 may be formed between the third sealing member 830 and one of the groove side walls, and a passage communicating with the micropassage 180 may also be formed between the third sealing member 830 and the other of the groove side walls. In this way, gas entering the third sealing cavity 142 can flow out of the third sealing cavity 142 after circling the third sealing member 830 at least halfway, as indicated by the arrows in Figure 8. Furthermore, the airflow groove 143 may penetrate the groove bottom wall along a predetermined direction, as shown in Figure 11.

[0056] As another example, referring to Figure 9, both inner walls may be provided with flow guide grooves 144. The flow guide grooves 144 may have openings toward the third sealed cavity 142, and a passage for gas to flow may be formed between the flow guide grooves 144 and the third sealed member, the passage communicating with a micropassage 180. Gas entering the third sealed cavity 142 passes through the passage and the micropassage 180, and as shown by the arrows in Figure 9, flows at least half a turn around the third sealed member 830 before flowing out of the third sealed cavity 142. Furthermore, the flow guide grooves 144 may penetrate the side walls of the grooves in a direction perpendicular to the groove bottom wall.

[0057] Similarly, if the third sealing member 830 has a single groove side wall, the inflow and outflow of gas into the third sealing cavity 142 can be achieved by lowering the height of the third sealing member 830 or by providing a flow guide groove 144 in the groove side wall.

[0058] Optionally, referring to Figure 11, the circumferential length of the airflow groove 143 is shorter than the circumferential length of the sealing groove. There may be one or more airflow grooves 143. If there are multiple airflow grooves 143, they may be spaced apart.

[0059] Optionally, the lid 140 is detachably connected to the housing 130, thereby achieving the objective of quickly draining the liquid from the liquid storage cavity 120 by removing the lid 140 from the housing 130.

[0060] Figure 12 is an exploded view of an oral irrigator provided by an embodiment of the present application. Referring to Figure 12, the oral irrigator provided by an embodiment of the present application may further include a mounting member 500. In other words, the bracket assembly may include a connecting member 400 and a mounting member 500. To facilitate assembly, the mounting member 500 may be fixed to the inner housing wall of the housing 100, and both the motor 200 and the pump mechanism 300 may be attached to the mounting member 500. Thus, during assembly, the motor 200 and the pump mechanism 300 can first be assembled to the mounting member 500, and then the two can be assembled together as a single assembly within the housing 100.

[0061] Furthermore, since both the motor 200 and the pump mechanism 300 generate vibrations during operation, the connection reliability of the pipeline communicating between the liquid discharge end 320 of the pump mechanism 300 and the first flow path 211 of the output shaft 210 is low, and it is very prone to detachment. To address the above problem, the inventors of this application considered disassembling the pump mechanism 300 into a power end 330, a liquid inlet end 310, and a liquid discharge end 320, and integrating the liquid discharge end 320 with a connecting member 400 and a mounting member 500 to reduce resonance and improve the connection reliability at the point where the second flow path 410 of the connecting member 400 communicates with the liquid discharge end 320 of the pump mechanism 300.

[0062] Specifically, referring to Figures 13 to 16, the second valve portion 321 of the liquid discharge end 320 may be integrated with the mounting member 500, and the second end cover portion 322 of the liquid discharge end 320 may be integrated with the connecting member 400. The power end 330, at least a part of the connecting member 400, and at least a part of the mounting member 500 may be arranged in order along the liquid discharge direction (second axial direction) of the liquid discharge end 320, and may be connected by a third fastening member 923. The connecting member 400 is connected to the output shaft 210 of the motor 200. In this way, the mounting member 500 isolates the connecting member 400 from the power end 330 of the pump mechanism 300, so that most of the vibrations of the pump body are transmitted to the mounting member 500. A vibration reducing member may be provided between the mounting member 500 and the inner housing wall of the housing 100. The mounting member 500 can eliminate vibrations through vibration-reducing connections, thereby reducing or completely eliminating vibrations transmitted from the power end 330 of the pump mechanism 300 to the connecting member 400. In this way, the influence of vibrations from the power end 330 of the pump mechanism 300 on the connecting member 400 is reduced, and the reliability of the connection at the point of communication between the second flow path 410 of the connecting member 400 and the liquid discharge end 320 of the pump mechanism 300 is improved. Furthermore, integrating the liquid discharge end 320 with the mounting member 500 and the connecting member 400 not only simplifies assembly but also shortens the waterway and improves connection reliability.

[0063] Optionally, the power end 330 may include a pump casing 331 and a piston 332, and one end of the pump casing 331 may have an opening. The mounting member 500 can seal and cover the opening, and together the mounting member 500 and the pump casing 331 can form a pump chamber of the pump mechanism 300 for the piston 332 to reciprocate along the liquid discharge direction of the liquid discharge end 320. The mounting member 500 may have a liquid discharge hole that penetrates the mounting member 500 and communicates with the pump chamber of the pump mechanism 300. The second valve portion 321 of the liquid discharge end 320 is located in the liquid discharge hole, and the second valve portion 321 of the liquid discharge end 320 can allow the liquid to be pumped out of the pump chamber and discharged through the liquid discharge hole, and prevent the liquid from flowing into the pump chamber through the liquid discharge hole.

[0064] Specifically, the piston 332 reciprocates within the pump chamber, pumping the liquid inside and discharging it through the liquid discharge hole. The valve at the liquid discharge end 320 has a one-way conductive function to prevent the liquid from flowing back into the pump chamber through the liquid discharge hole. In this solution, the objective of integrating the valve portion of the liquid discharge end 320 is achieved by using the mounting member 500 to form the pump chamber and the liquid discharge hole.

[0065] Optionally, referring to Figure 16, the power end 330 may further include a drive member 333, which may have a drive shaft that rotates relative to the pump casing 331. The drive shaft can drive an eccentric wheel to rotate relative to the pump casing 331. The eccentric wheel can push the piston 332 back and forth.

[0066] Referring to Figures 15 to 17, optionally, at least a portion of the connecting member 400 and the second end cover portion 322 of the liquid discharge end 320 may be a single integrated member formed by an integral molding process. The second end cover portion 322 of the liquid discharge end 320 may cover the liquid discharge hole, and a liquid discharge channel connecting the liquid discharge hole and the second flow path 410 may be formed in the second end cover portion 322 of the liquid discharge end 320.

[0067] Specifically, the liquid discharge passage of the second end cover portion 322 of the liquid discharge end 320 can guide the flow direction of the liquid flowing out from the liquid discharge hole. In this solution, the connecting member 400 and the second end cover portion 322 of the liquid discharge end 320 are made into a single integrated member, thereby integrating the liquid discharge passage and the second flow path 410. This improves the reliability of the connection at the communication point, improves the smoothness of the liquid flow, and improves the convenience of assembly.

[0068] Optionally, the mounting member 500 may have a liquid inlet that penetrates the mounting member 500 and communicates with the pump chamber of the pump mechanism 300. The first valve portion 311 of the liquid inlet end 310 may be located in the liquid inlet, and the first valve portion 311 of the liquid inlet end 310 can allow the liquid to be pumped and sent into the pump chamber through the liquid inlet, and prevent the liquid from flowing out through the liquid inlet.

[0069] Specifically, the piston 332 reciprocates within the pump chamber, pumping the liquid and sending it into the pump chamber through the liquid inlet. The valve at the liquid inlet end 310 has a one-way conductivity function to prevent the liquid from flowing out through the liquid inlet. In this solution, the objective of integrating the first valve portion 311 of the liquid inlet end 310 is achieved by using the mounting member 500 to form the pump chamber and the liquid inlet.

[0070] Optionally, at least a portion of the connecting member 400 and the first end cover portion 312 of the liquid inlet end 310 may be a single integrated member formed by an integral molding process. The first end cover portion 312 of the liquid inlet end 310 may cover the liquid inlet hole. Furthermore, a liquid inlet channel communicating with the liquid inlet hole may be formed in the first end cover portion 312 of the liquid inlet end 310, and this liquid inlet channel may communicate with the third channel 420 of the connecting member 400. In addition, the internal cavity of the housing 100 may include a liquid storage cavity body 120, and the third channel 420 of the connecting member 400 may communicate the liquid inlet channel with the liquid storage cavity body 120. In this way, the liquid inlet passage of the first end cover portion 312 of the liquid inlet end 310 can guide the flow direction of the liquid flowing into the liquid inlet hole. In this solution, the connecting member 400 and the first end cover portion 312 of the liquid inlet end 310 are made into a single integrated component, thereby integrating the liquid inlet passage and the third flow path 420. This improves the reliability of the connection at the communication point, enhances the smoothness of the liquid flow, and improves the ease of assembly.

[0071] Referring to Figures 13 to 16, optionally, the mounting member 500 may include a first mounting portion 510, which may have a first and second side facing each other along the liquid discharge direction of the liquid discharge end 320. The motor 200 and the power end 330 of the pump mechanism 300 may be spaced apart along the axial direction of the output shaft 210 and positioned on the first side of the first mounting portion 510. The portion of the connecting member 400 of the second end cover portion 322, into which the liquid discharge end 320 is integrated, may be positioned on the second side of the first mounting portion 510. The mounting member 500 may have a through hole 530 that restricts at least one side of the connecting member 400 along the axial direction of the output shaft 210 for the connecting member 400 to pass through. In this way, the through hole 530 can be used to restrict the connecting member 400 in order to provide upward support and positional restriction to the connecting member 400 and prevent the connecting member 400 from vibrating up and down. Optionally, the circuit board 720 can be attached to the side of the first mounting portion 510 away from the motor 200 via a third fastening member 924. A fourth vibration reduction member 914 may be provided between the circuit board 720 and the inner housing wall of the housing 100.

[0072] Referring to Figures 12 and 13, optionally, the mounting member 500 may further include a second mounting portion 520. The second mounting portion 520 may be connected to the first side of the first mounting portion 510, and together the second mounting portion 520 and the first mounting portion 510 can form a housing space for enclosing the outer surface of the motor 200. In this way, the mounting member 500 encloses the outer surface of the motor 200 and transmits most of the vibrations of the motor 200 to the mounting member 500, thereby reducing or eliminating the vibrations transmitted by the motor 200 to the connecting member 400. As a result, the influence of vibrations at the power end 330 of the motor 200 on the connecting member 400 is reduced, and the reliability of the connection at the point of communication between the second flow path 410 of the connecting member 400 and the first flow path 211 of the motor 200 is improved. Optionally, as shown in Figure 13, the first mounting portion 510 and the second mounting portion 520 may be fastened together by the second fastening member 922.

[0073] Optionally, a vibration-reducing member is sandwiched between the first mounting portion 510 and the outer surface of the motor 200, and / or between the second mounting portion 520 and the outer surface of the motor 200. In this way, the vibration-reducing members can reduce the transmission of vibrations between the motor 200 and the mounting member 500. For example, in Figure 13, the second vibration-reducing member 912 is sandwiched between the front end of the motor 200 and the mounting member 500, and the third vibration-reducing member 913 is sandwiched between the rear end of the motor 200 and the mounting member 500.

[0074] Referring to Figure 17, optionally, the connecting member 400 may have a mounting groove 450 through which the output shaft 210 of the motor 200 is inserted. A fourth sealing member 840 may be filled between the inner groove wall of the mounting groove 450 and the output shaft 210 of the motor 200. Specifically, the first flow path 211 of the output shaft 210 and the second flow path 410 of the connecting member 400 can communicate through the mounting groove 450, and by providing a sealing member, liquid seepage at the communication point can be prevented.

[0075] Continuing to refer to Figure 17, optionally, the motor 200 may include a motor body 220 and an output shaft 210. The output shaft 210 of the motor 200 may be positioned to pass through the motor body 220, and both axial ends of the output shaft 210 may pass through to the outside of the motor body 220. Together, the bottom surface of the motor body 220 and the inner groove wall of the mounting groove 450 can form a restricting space to restrict the fourth sealing member 840. This restricting space can restrict both axial ends of the output shaft 210 of the fourth sealing member 840. In this way, by restricting the fourth sealing member 840 with the bottom surface of the motor body 220 of the motor 200 and the groove bottom wall of the mounting groove 450, it is possible to prevent the fourth sealing member 840 from moving due to vibration.

[0076] Referring to Figure 17, the second flow path 410 may include a first flow path segment 411 and a second flow path segment 412 that are in sequential communication. The first flow path segment 411 communicates with the liquid discharge end 320 and may extend along the first axial direction. There is a gap between the first flow path segment 411 and the first flow path 211 in the second axial direction. The second flow path segment 412 may communicate with the first flow path segment 411 and the first flow path 211, and the second flow path segment 412 may include a first arc segment 4121, and the first arc segment 4121 and the first flow path segment 411 may transition in an arc shape. By utilizing the arc shape transition, the resistance of the inner wall of the flow path to the liquid is reduced, and the flow of liquid is facilitated.

[0077] Furthermore, the first arc segment 4121 may be higher than the pump mechanism 300, and the first arc segment 4121 may have an arc center that points toward the pump mechanism 300. This allows the liquid to flow relatively gently toward the first flow path 211, further reducing the resistance of the flow path inner wall to the liquid.

[0078] Optionally, the second channel segment 412 further includes a second arc segment 4122, and the second arc segment 4122 and the first channel 211 transition in an arc shape. By utilizing the arc shape transition, the resistance of the inner wall of the channel to the liquid is reduced, which is advantageous for the liquid flow.

[0079] Furthermore, since the second arc segment 4122 has an arc center that faces the motor 200, the second arc segment 4122 and the first flow path 211 are smoothly connected, which is advantageous for the flow of liquid.

[0080] Referring to Figures 17 and 18, optionally, the connecting member 400 may include a first connecting portion 430 and a second connecting portion 440 connected to each other. The first connecting portion 430 may have a first flow channel segment 411 and a reversing cavity 431 communicating with the first flow channel segment 411. The reversing cavity 431 may have a first inner arcuate surface 432, and the reversing cavity 431 may have an opening in the first axial direction. At least a portion of the second connecting portion 440 may be positioned inside the reversing cavity 431 through the opening of the reversing cavity 431, and may have a second inner arcuate surface 441. The first inner arcuate surface 432 and the second inner arcuate surface 441 may together form surrounding the second flow channel segment 412.

[0081] Specifically, the second connection portion 440 may include a cover plate segment 442, a projection segment 443, and a barrier plate segment 444. The projection segment 443 and the barrier plate segment 444 may be connected to both sides of the cover plate segment 442 along the first axial direction, respectively. The cover plate segment 442 may seal and cover the reversal cavity 431, and the barrier plate segment 444 may be located inside the reversal cavity 431 and may have a second inner arc surface 441. The cover plate segment 442 may have a through hole, the projection segment 443 may surround the outside of the through hole, and the internal cavity of the projection segment 443 may communicate with the through hole. The output shaft 210 may be positioned to pass through the internal cavity and through hole of the projection segment 443, and a fourth sealing member 840 is provided between the output shaft 210 and the internal cavity wall of the projection segment 443. In this way, the protruding segment 443 and a portion of the cover plate segment 442 can form the mounting groove 450 mentioned above.

[0082] Here, terms such as "upper" and "lower" are used to explain the relative positional relationships of each structure in the attached drawings, and are merely for the purpose of facilitating explanation, and are not intended to limit the scope of the invention. Any changes or adjustments to these relative relationships will be considered within the scope of the invention, as long as they do not result in a substantial change to the technical content.

[0083] In this application, unless otherwise explicitly stated and limited, "above" or "below" the second feature of the first feature may mean that the first feature is in direct contact with the second feature, or that the first feature is indirectly in contact with the second feature through an intermediate medium. Furthermore, "above," "above," and "upper side" of the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is greater than that of the second feature. "Below," "below," and "below side" of the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0084] Furthermore, in this application, unless otherwise specifically and explicitly designated and limited, terms such as “attachment,” “connection,” “bonding,” and “fixing” should be understood in a broad sense, for example, as fixed connection, removable connection, or integration. This may be direct connection, indirect connection via an intermediate medium, internal communication between two elements, or an interaction relationship between two elements. Those skilled in the art will understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0085] In this specification, any reference to terms such as “one embodiment,” “several embodiments,” “exemplary embodiment,” “example,” “specific example,” or “several examples” means that the specific features, structures, materials, or properties described in conjunction with such embodiment or example are included in at least one embodiment or example of this disclosure. In this specification, exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be combined in any one or more embodiments or examples in an appropriate manner.

[0086] The above embodiments are merely for illustrative purposes and do not limit the technical means of this application. While the present application has been described in detail with reference to the above embodiments, those skilled in the art can modify the technical means described in the above embodiments or replace some or all of the technical features with equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solution to deviate from the scope of the technical means of the embodiments of this application.

Claims

1. An oral irrigation device comprising a housing (100), a motor (200), a pump mechanism (300), and a bracket assembly, wherein the motor (200), the pump mechanism (300), and the bracket assembly are all located within the internal cavity of the housing (100), the output shaft (210) of the motor (200) has a first flow path (211) that penetrates the output shaft (210), and the bracket assembly is connected to the inner housing wall of the housing (100). The oral irrigation device is characterized in that the pump mechanism (300) includes a liquid inlet end (310), a liquid outlet end (320), and a power end (330), the pump mechanism (300) is capable of pumping liquid and sending it from the liquid inlet end (310) into the pump chamber of the pump mechanism (300), and discharging it from the liquid outlet end (320), the liquid outlet end (320) is integrated with the bracket assembly, and the bracket assembly has a second flow path (450) that connects the liquid outlet end (320) to the first flow path (211).

2. The bracket assembly includes a connecting member (400) and a mounting member (500), The second valve portion (321) of the liquid discharge end (320) is integrated with the mounting member (500), the second end cover portion (322) of the liquid discharge end (320) is integrated with the connecting member (400), the power end (330), at least a part of the connecting member (400), and at least a part of the mounting member (500) are arranged in order along the liquid discharge direction of the liquid discharge end (320) and connected by fastening members. The oral irrigation device according to claim 1, characterized in that the connecting member (400) is connected to the output shaft (210) of the motor (200), and the connecting member (400) has the second flow path (450).

3. The power terminal (330) includes a pump casing (331) and a piston (332), and one end of the pump casing (331) is open. The mounting member (500) seals and covers the opening, and together the mounting member (500) and the pump casing (331) form a surrounding pump chamber of the pump mechanism (300) for which the piston (332) reciprocates along the liquid discharge direction of the liquid discharge end (320), the mounting member (500) has a liquid discharge hole that penetrates the mounting member (500) and communicates with the pump chamber of the pump mechanism (300), the second valve portion (321) of the liquid discharge end (320) is positioned in the liquid discharge hole, and the second valve portion (321) of the liquid discharge end (320) is positioned to allow liquid to be discharged from the pump chamber through the liquid discharge hole by pumping, and to prevent liquid from flowing into the pump chamber through the liquid discharge hole, characterized in that the oral irrigation device described in 2.

4. The oral irrigation device according to claim 3, characterized in that at least a portion of the connecting member (400) and the second end cover portion (322) of the liquid discharge end (320) are integral members formed by an integral molding process, the second end cover portion (322) of the liquid discharge end (320) covers the liquid discharge hole, and a liquid discharge channel is formed in the second end cover portion (322) of the liquid discharge end (320) that connects the liquid discharge hole and the second channel (450).

5. The oral irrigation device according to claim 3, characterized in that the mounting member (500) has a liquid inlet hole that penetrates the mounting member (500) and communicates with the pump chamber of the pump mechanism (300), the valve portion of the liquid inlet end (310) is positioned in the liquid inlet hole, and the first valve portion (311) of the liquid inlet end (310) is positioned to allow the liquid to be sent into the pump chamber through the liquid inlet hole by pumping, and to prevent the liquid from flowing out through the liquid inlet hole.

6. At least a portion of the connecting member (400) and the first end cover portion (312) of the liquid inlet end (310) are integral members formed by an integral molding process, the first end cover portion (312) of the liquid inlet end (310) covers the liquid inlet hole, and the first end cover portion (312) of the liquid outlet end (320) has a liquid inlet channel formed in it that communicates with the liquid inlet hole. The oral irrigation device according to claim 5, characterized in that the internal cavity of the housing (100) includes a liquid storage cavity body (120), the connecting member (400) has a third flow path (460) for liquid to flow, and the third flow path (460) connects the liquid introduction flow path and the liquid storage cavity body (120).

7. The mounting member (500) includes a first mounting portion (510), the first mounting portion (510) having a first side and a second side arranged opposite to each other along the liquid discharge direction of the liquid discharge end (320), the motor (200) and the power end (330) of the pump mechanism (300) are spaced apart along the axial direction of the output shaft (210) and are located on the first side of the first mounting portion (510), the portion of the connecting member (400) into which the end cap portion of the liquid discharge end (320) is integrated is located on the second side of the first mounting portion (510), The oral irrigation device according to any one of claims 2 to 6, characterized in that the mounting member (500) has a through hole that restricts at least one side of the connecting member (400) along the axial direction of the output shaft (210) for the connecting member (400) to pass through.

8. The oral irrigation device according to claim 7, characterized in that the mounting member (500) further includes a second mounting portion (520), the second mounting portion (520) is connected to the first side of the first mounting portion (510), and the second mounting portion (520) and the first mounting portion (510) together form a housing space that encloses the outer surface of the motor (200).

9. The oral irrigation device according to claim 8, characterized in that a vibration-reducing member is sandwiched between the first mounting portion (510) and the outer surface of the motor (200), and / or a vibration-reducing member is sandwiched between the second mounting portion (520) and the outer surface of the motor (200).

10. The oral irrigation device according to any one of claims 2 to 6, characterized in that the connecting member (400) has a mounting groove through which the output shaft (210) of the motor (200) is inserted, and a sealing member is filled between the inner groove wall of the mounting groove and the output shaft (210) of the motor (200).

11. The motor (200) includes a motor body, and the output shaft (210) of the motor (200) is positioned to penetrate the motor body, and both axial ends of the output shaft (210) penetrate to the outside of the motor body. The oral irrigation device according to claim 10, characterized in that the bottom surface of the motor body and the inner groove wall of the mounting groove together form a restricting space for restricting the sealing member, and the restricting space restricts both axial ends of the output shaft (210) of the sealing member.

12. An oral irrigator comprising a cleaning accessory (2000) and an oral irrigation device (1000) according to any one of claims 1 to 11, wherein the cleaning accessory (2000) has a cavity (2200) and an outlet (2300) communicating with the cavity (2200), the output shaft (210) of the motor (200) of the oral irrigation device (1000) is connected to the cleaning accessory (2000) and drives the cleaning accessory (2000) to perform displacement motion, and the first flow path (211) of the output shaft (210) communicates with the cavity (2200) of the cleaning accessory (2000), and the pump mechanism (300) outputs a water flow impact through the outlet (2300).

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