Housing and oral irrigation device for oral cleaning

Abstract

Embodiments of this application provide a housing and oral rinsing device for oral rinsing, the housing comprising a shell and a cover body, the shell having an opening, the cover body covering the opening of the shell, the cover body and the shell being nested together along a predetermined direction, the cover body and the shell defining a liquid storage cavity, a microchannel being formed between the shell and the cover body, the microchannel being able to allow gas to pass along the predetermined direction and block liquid leakage, and the microchannel being able to communicate the liquid storage cavity with the outside world using the assembly gap between the shell and the cover body. The housing and oral rinsing device for oral rinsing provided by embodiments of this application have a non-porous exterior and have the effects of breathability and waterproofing.

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application with the application number 202410594637.1 and the invention title of "Housing for Oral Cleaning and Oral Cleaning Device", which was filed with the China Patent Office on May 13, 2024, and the entire content thereof is incorporated herein by reference.

[0002] The embodiments of this application relate to the technical field of oral cleaning appliances, and particularly to a housing for oral cleaning and an oral cleaning device.

Background Art

[0003] With the increasing attention people pay to oral care, electric toothbrushes and water flossers have gradually become common oral care tools in households. Among them, an electric toothbrush uses a motor to vibrate the brush head at a high frequency, instantly decomposing toothpaste into fine bubbles and cleaning deep between teeth. A water flosser uses a water pump to pump out a high-speed water column with a certain pressure and utilizes the impact force of the high-speed water column to clean teeth and between teeth.

[0004] Related oral cleaners can include a machine body, a cleaning component, a motor, a water pump, and a water tank. Here, the cleaning component is arranged at the head of the machine body, and the motor, water pump, and water tank are arranged inside the machine body. A flow path through which water supply flows is formed on the output shaft of the motor, and this flow path communicates with the water tank. The cleaning component has a cavity and an outlet communicating with the cavity. The output shaft of the motor is arranged to pass through the cavity, and the flow path of the output shaft of the motor communicates with the outlet, and by the action of the water pump, the liquid in the water tank can be ejected from the outlet through the flow path.

[0005] The casing of the relevant oral irrigator is equipped with vents, allowing airflow to enter the water tank through these vents when the water pump draws up water. However, these vents may be designed on the external surface of the casing, and if the user grips the casing, the vents may become blocked, potentially affecting the operation of the water pump. [Overview of the project] [Problems that the invention aims to solve]

[0006] The purpose of this application is to provide a housing and oral irrigation device for oral irrigation that can realize a hidden ventilation hole design by utilizing the microstructure of the sealed cover body while taking the external design into consideration, thereby solving the problem of exposed ventilation holes being blocked when the user grips the device and affecting the operation of the water pump, and without adding the design overhead of the internal ventilation line. [Means for solving the problem]

[0007] To achieve the above objective, one embodiment of the present application provides a housing for oral cleaning comprising a shell and a cover body, wherein the shell has an opening, the cover body covers the opening of the shell, the cover body and the shell are nested together along a predetermined direction, the cover body and the shell define a liquid storage cavity, a microchannel is formed between the shell and the cover body, the microchannel can allow gas to pass along the predetermined direction and block liquid outflow, and the microchannel communicates the liquid storage cavity with the outside world using the assembly gap between the shell and the cover body.

[0008] Preferably, a seal groove having an outward-facing opening is provided in one side wall of the shell and the cover body, a seal cavity is formed surrounded by the shell, the other side wall of the cover body and the seal groove, the seal cavity communicates the liquid storage cavity with the outside world through the assembly gap, a gas flow groove having an opening facing the seal cavity is provided in the groove bottom wall of the seal groove, the housing further comprises a seal member sandwiched between the other inner wall of the shell and the cover body and the groove bottom wall of the seal groove, and the microchannel is formed between the surface of the seal member near the gas flow groove and the gas flow groove.

[0009] Preferably, in the predetermined direction, the liquid level difference h formed by the highest liquid level height of the liquid storage cavity and the height of the horizontal plane where the gas flow groove is located satisfies the condition 0 < ρ * g * h ≤ 30% * Po, where ρ represents the air density, g represents the liquid density, and Po represents 1 atmosphere.

[0010] Preferably, the height difference h satisfies the condition 0 < ρ*g*h ≤ 20%*Po.

[0011] Preferably, the height difference h satisfies the condition 0 < ρ*g*h ≤ 10%*Po.

[0012] Preferably, the depth of the gas flow groove is in the range of 0.1 mm to 0.4 mm.

[0013] Preferably, the depth of the gas flow groove is in the range of 0.25 mm to 0.35 mm.

[0014] Preferably, the seal groove has a groove bottom wall and two groove side walls, the two groove side walls are connected to both sides of the groove bottom wall along the predetermined direction, and in the predetermined direction, the height of the seal member is lower than the height of the groove bottom wall.

[0015] Preferably, the gas flow groove penetrates the groove bottom wall along the predetermined direction.

[0016] Preferably, the seal groove has a groove bottom wall and two groove side walls, the two groove side walls connected to both sides of the groove bottom wall along the extending direction of the side wall of the cover body, and guide grooves having openings facing the seal cavity are provided in both of the two inner walls, a channel for gas flow is formed between the guide groove and the seal member, the channel is in communication with the microchannel, and gas that enters the seal cavity flows through the channel and the microchannel, around the seal member at least half a turn, and then flows out of the seal cavity.

[0017] Preferably, the guide groove penetrates the side wall of the groove in a direction perpendicular to the bottom wall of the groove.

[0018] Preferably, the circumference of the gas flow groove is shorter than the circumference of the seal groove.

[0019] Another embodiment of the present application provides an oral irrigator comprising a pump mechanism, a cleaning component, and the above-mentioned housing for oral irrigation, wherein the pump mechanism is disposed in an internal cavity of the housing, the cleaning component has a cavity and an outlet communicating with each other, the cavity of the cleaning component is connected to the liquid discharge end of the pump mechanism, and the pump mechanism pumps the liquid in the liquid storage cavity into the cavity of the cleaning component and discharges it out from the outlet.

[0020] Preferably, the cleaning component further includes brush bristles. [Effects of the Invention]

[0021] In the housing for oral cleaning and the oral cleaning device provided by the embodiments of the present application, the cover body is inserted into the shell from the opening of the shell to cover the opening of the shell, and a liquid storage cavity is formed by the cover body and the shell higher than the cover body. Then, a microchannel is formed between the outer surface of the cover body and the inner wall of the shell. By using the assembly gap between the cover body and the shell, the microchannel communicates with the outside world, hiding the gas flow channel inside the shell and facilitating ventilation so as not to block the gas flow channel. Further, the aperture of this microchannel is small, and the gas flow can be allowed and the liquid outflow can be blocked by the action of the external atmospheric pressure and the negative pressure in the liquid storage cavity, realizing the functions of ventilation and leakage prevention.

Brief Description of Drawings

[0022] [Figure 1] It is a schematic diagram of a related oral cleaner. [Figure 2] It is a schematic diagram of the oral cleaning device provided by the embodiments of the present application. [Figure 3] It is a longitudinal sectional view of the oral cleaning device shown in FIG. 2. [Figure 4] It is a partial view of another longitudinal section of the oral cleaning device shown in FIG. 2. [Figure 5] It is an internal layout diagram of the oral cleaning device provided by the embodiments of the present application. [Figure 6] It is another internal layout diagram of the oral cleaning device provided by the embodiments of the present application. [Figure 7] It is a sectional view of the partition member shown in FIG. 4. [Figure 8] It is a partial sectional view of the housing in the gas flow groove provided by the embodiments of the present application. [Figure 9] It is a partial sectional view of the housing in another gas flow groove provided by the embodiments of the present application. [Figure 10] It is a partial sectional view of the housing at a location where there is no gas flow groove provided by the embodiments of the present application. [Figure 11]This is a schematic diagram of the cover body and third seal 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 member, mounting member, and circuit board shown. [Figure 14] Figure 13 is an assembly perspective view of the mounting member, connecting member, 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 shown. [Figure 17] This is a schematic diagram of a portion of Figure 3. [Figure 18] This is an exploded view of the connecting member provided by the embodiment of this application. [Modes for carrying out the invention]

[0023] Figure 1 is a schematic diagram of the relevant oral irrigator. Referring to Figure 1, the body of the relevant oral irrigator is of an elongated type, with the water tank located on the right side of the body and the motor, water pump, and battery located on the left side. The length of the water tank is almost the same as the length of the body, and the diameter of the water tank opening is small, making it difficult for the user to clean the inner wall of the water tank. In addition, the water pump is located in the left center of the body, and the input terminal a and output terminal b of the water pump are located at the top of the water pump. As a result, the longitudinal distance between the input terminal a of the water pump and the bottom of the water tank is too long, resulting in a long water channel between them, which does not help the water pump to draw up the liquid in the water tank.

[0024] In view of the above technical problems, the inventors of this application considered arranging the water tank at the bottom of the machine and the motor, water pump, etc., above the water tank to shorten the length of the water tank and facilitate cleaning the water tank. In addition, the width of the machine in the short direction can be reduced to make it easier for the user to carry. However, this arrangement reduces the volume of the water tank. In order to maximize the volume of the water tank, the inventors of this application attempted to shorten the length of the water pump. Specifically, since the input and output ends of the water pump are arranged above the water pump, this can be changed to arrange them below the water pump. This not only increases the depth of the submersible water tank in the long direction, but also shortens the distance between the input end of the water pump and the bottom of the water tank, improving the suction effect of the water pump. Alternatively, a diversion channel may be provided using the space on the side of the water pump so that the output end of the water pump, which is located below, communicates with the flow path of the output shaft of the motor, which is located above. In this way, by rationally arranging the positions of the water tank, water pump, and motor while maintaining the elongated appearance of the aircraft, it is possible not only to increase the volume of the submersible water tank but also to improve the suction effect of the water pump.

[0025] To further clarify the purpose, technical solutions, and advantages of the embodiments of this application, the technical solutions in the embodiments of this application are described below clearly and completely, together with the drawings of the embodiments of this application. Obviously, the embodiments described are a part of, but not all, of, the embodiments of this application.

[0026] All other embodiments that a person skilled in the art could obtain without creative effort based on the embodiments in this application are all included within the scope of protection of this application. Where there is no inconsistency, the following embodiments and features thereof can be combined with each other.

[0027] 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 the oral irrigator 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 component 2000. Here, the cleaning component 2000 may be a device capable of cleaning the mouth, such as a toothbrush head, a rinsing head, or a rinse-integrated head. Figure 3 shows an example where the cleaning component 2000 is a rinse-integrated head, but the cleaning component 2000 may include a brush body 2100, and the brush body 2100 may have a cavity 2200 and an outlet 2300 communicating with the cavity 2200.

[0028] Continuing to refer to Figure 3, the oral irrigator 1000 may comprise a housing 100 and a power unit. The power unit may include power components and connecting members 400. Here, the housing 100 may be formed in an elongated cylindrical shape for ease of handling by the user. The cross-sectional shape of the housing 100 may be circular or non-circular (e.g., D-shaped, elliptical, polygonal, etc.). The first axis X is the centerline of the housing 100, that is, the center points of each cross-section of the housing 100 may all lie on the first axis X. The housing 100 may extend along the direction of the first axis X (e.g., the vertical direction in Figure 3) and may have an upper end 160 and a lower end 170 that are positioned opposite each other along the direction of the first axis X. The interior of the housing 100 may be hollow so that the housing 100 has an internal cavity.

[0029] The power component may be located in an internal cavity of the housing 100. The power component may also include a motor 200 and a pump mechanism 300. Here, in order to maintain the elongated shape requirements of the housing 100, the motor 200 and the pump mechanism 300 may be arranged sequentially along the direction of the first axis X. The motor 200 may be located closer to the upper end 160 of the housing 100 than the pump mechanism 300 (as shown in Figure 3, the motor 200 is located above the pump mechanism 300). This allows the output shaft 210 of the motor 200 to exit from the upper end 160 of the housing 100 and be connected to a cleaning part 2000 (e.g., a part with brush bristles such as a toothbrush head or a rinse-integrated head), thereby moving the cleaning part 2000. The motor 200 may be a rotary motor capable of rotating the cleaning part 2000. Alternatively, the motor 200 may be a vibratory motor capable of oscillating the cleaning part 2000 at a high frequency (e.g., an ultrasonic motor). The motor 200 may include a motor body 220 and an output shaft 210. Here, the axis of the output shaft 210 may coincide with the first axis X of the housing 100, or it may be arranged parallel to it at a distance. The output shaft 210 may be arranged so as to pass through the motor body 220 in its axial direction. Here, the axial upper end 160 of the output shaft 210 exits from the upper end 160 of the motor body 220 and is connected to the cleaning part 2000, allowing the cleaning part 2000 to move.

[0030] 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 120, which may be used to store liquid. 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 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 on 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.

[0031] The third channel 420 can connect the liquid storage cavity 120 to the liquid inlet end 310 of the pump mechanism 300, and the second channel 410 can connect the liquid discharge end 320 of the pump mechanism 300 to the first channel 211. In this way, both the second channel 410 and the third channel 420 are integrated into the connecting member 400, which not only reduces the number of parts required for assembly and improves assembly efficiency, but also improves the overall structural strength of the second channel 410 and the third channel 420 to resist the impact force of the water flow, and further improves the connection stability between the liquid storage cavity 120 and the second channel 410, the second channel 410 and the pump mechanism 300, the pump mechanism 300 and the third channel 420, and the third channel 420 and the first channel 211 of the output shaft 210, thereby reducing the risk of liquid leakage at the connection points.

[0032] If the cleaning component 2000 is a rinsing head or a rinse-integrated head, and has a cavity 2200 and an outlet 2300 communicating with the cavity 2200, and is a component capable of discharging liquid from the outlet 2300, then the first flow path 211 of the output shaft 210 can communicate with the outlet 2300 via the cavity 2200 of the cleaning component 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 a rinsing function, the pump mechanism 300 can guide the liquid in the liquid storage cavity 120 to enter the pump chamber of the pump mechanism 300 via the third flow path 420 and the liquid intake end 310 of the pump mechanism 300, then to enter the first flow path 211 via the liquid discharge end 320 and the second flow path 410 of the pump mechanism 300, and then to flow out from the outlet 2300 via the cavity 2200 of the cleaning component 2000.

[0033] Referring to Figure 3, the power components (motor 200 and pump mechanism 300) and the liquid storage cavity 120 can be arranged sequentially along the direction of the first axis X (as in Figure 1, the power components are located above the liquid storage cavity 120). This makes it easy to shorten the longitudinal length of the liquid storage cavity 120, which is convenient for the user to clean the water tank, and also makes it possible to reduce the width of the housing 100 in the short direction so that it is easy for the user to hold. Here, the pump mechanism 300 may be closer to the liquid storage cavity 120 than the motor 200 so that the pump mechanism 300 can easily draw liquid from the liquid storage cavity 120.

[0034] Referring to Figures 3 and 4, preferably, in order to increase the volume of the liquid storage cavity 120 by increasing the longitudinal height of the liquid storage cavity 120, the liquid discharge end 320 of the pump mechanism 300 may output liquid along the second axis Y, and both the liquid inlet end 310 and the liquid discharge end 320 of the pump mechanism 300 may be positioned on the pump mechanism 300 side along the direction of the second axis Y. Here, the second axis Y intersects the first axis X. This shortens the length occupied by the pump mechanism 300 in the direction of the first axis X, lengthens the length of the liquid storage cavity 120 in the direction of the first axis X, and further increases the volume of the liquid storage cavity 120. Furthermore, the direction of the second axis Y is perpendicular to the direction of the first axis X. As shown in Figures 3 and 4, the direction of the first axis X is vertical, the direction of the second axis Y is horizontal, and both the liquid inlet end 310 and the liquid discharge end 320 of the pump mechanism 300 are located on the left side of the pump mechanism 300.

[0035] In order to make effective use of the lateral space of the pump mechanism 300, the connecting member 400 can be further connected to the pump mechanism 300 side (left side in Figures 3 and 4) along the direction of the second axis Y, such that the third flow path 420 and at least a portion of the second flow path 410 are located on the pump mechanism 300 side (left side in Figures 3 and 4) along the direction of the second axis Y. The connection point between the connecting member 400 and the liquid storage cavity 120 may be located on the pump mechanism 300 side (left side in Figure 4) along the direction of the second axis Y in order to shorten the distance between the liquid intake end 310 of the pump mechanism 300 and the liquid storage cavity 120, and to facilitate the pump mechanism 300 insulating the liquid in the liquid storage cavity 120.

[0036] Furthermore, in the direction of the first axis X, the liquid inlet end 310 and the liquid discharge 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 discharge end 320 of the pump mechanism 300 are positioned at one end of the pump mechanism 300 that is closer to the liquid storage cavity 120 along the direction of the first axis X. 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 in order to facilitate the pump mechanism 300 in drawing liquid from the liquid storage cavity 120. The distance between the liquid discharge end 320 of the pump mechanism 300 and the first flow path 211 is lengthened in order to reduce the impact force of the liquid at the liquid discharge end 320 of the pump mechanism 300 on the output shaft 210 of the motor 200 and improve the stability of the connection.

[0037] The mouthwash device 1000 provided by the embodiments of this application may further include an energy source 710, which 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 a storage battery. In order to allow the mouthwash device 1000 to maintain an elongated type, the energy source 710 may be located on the side of the pump mechanism 300 away from the motor 200 (lower side in Figures 3 and 4) along the direction of the first axis X, and at least a portion of the energy source 710 and at least a portion of the liquid storage cavity 120 may be arranged side by side. That is, the energy source 710 together with the liquid storage cavity 120 occupies the lower end 170 of the housing 100.

[0038] Figure 5 is an internal layout diagram of an oral irrigator provided by an embodiment of the present application. Referring to Figures 3 to 5, as an example, the liquid storage cavity 120 may enclose one side of the energy source 710 in the first axial direction. For example, in Figure 5, the liquid storage cavity 120 does not 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 chamber 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 120 may be formed in a "concave" shape, and the energy source 710 may be located in the recess of the concave liquid storage cavity 120. As another example, 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 may be in contact with the inner bottom surface of the housing 100.

[0039] Figure 6 is another internal layout diagram of the oral irrigator 1000 provided by an embodiment of the present application. Referring to Figure 6, as another example, a space for the energy source 710 is formed between the liquid storage cavity 120 and the inner shell wall of the housing 100. For example, in Figure 6, the liquid storage cavity 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 chamber 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 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 120. As another example, 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 may be in contact with the inner bottom surface of the housing 100.

[0040] The liquid storage cavity 120 may be formed by a shell 130 independent of the housing 100, and the liquid storage cavity 120 may be detachably connected to the housing 100 so that the user can easily remove the liquid storage cavity 120 from the housing 100 for cleaning. Alternatively, the liquid storage cavity 120 may be formed by the inner wall of the shell 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 located in the internal cavity of the housing 100, which divides the internal cavity of the housing 100 into a power cavity 110 and a liquid storage cavity 120. Here, the motor 200, the pump mechanism 300, and the energy source 710 may all be located in the power cavity 110.

[0041] Preferably, at least a portion of the planar projection of the power cavity 120 along the first axis X does not overlap with the planar projection of the liquid storage cavity 110 along the first axis X, or at least a portion of the planar projection of the liquid storage cavity 110 along the first axis X does not overlap with the planar projection of the power cavity 120 along the first axis X.

[0042] Preferably, at least a portion of the y-axis of the planar projection of the power cavity 120 along the first axis X overlaps with the planar projection of the liquid storage cavity 110 along the first axis X.

[0043] As shown in Figures 5 and 6, the partition member 600 can form a power cavity 110 by being surrounded by the inner shell wall of the housing 100 located on one side of the partition member 600 in the direction of the first axis X (left side in Figures 5 and 6), and the partition member 600 can form a liquid storage cavity 120 by being surrounded by the inner shell wall of the housing 100 located on the other side of the partition member 600 in the direction of the first axis X (right side in Figures 5 and 6).

[0044] For example, referring to Figures 4 and 7, the partition member 600 is detachably connected to the housing 100 so that the user can easily remove the partition member 600 from the housing 100 for cleaning. From the viewpoint of sealing, a first sealing member 810 may be filled between the partition member 600 and the housing 100. For example, a first sealing groove can be provided on the outer wall of the partition member 600, and a first sealing cavity can be formed between the first sealing groove and the inner wall of the shell of the housing 100. The first sealing member 810 may be a first sealing ring, and the first sealing ring may be sealed within the first sealing cavity to prevent liquid leakage. Furthermore, the partition member 600 and the housing 100 can be detachably connected by an engagement connection, and / or the partition member 600 and the connecting member 400 (or the mounting member 500 described later) can be fastened together by a fastening member such as a bolt. In addition, the connection points of the fastening members can be waterproofed. For example, referring to Figure 12, the partition member 600 may have a blind hole, the connecting member 400 or mounting member 500 may have a screw hole, and the first fastening member 921 may be positioned to pass through the blind hole in the partition member 600 and be screw-connected to a screw hole located in the connecting member 400 or mounting member 500.

[0045] In another example, the partition member 600 and the housing 100 may be a single part manufactured using an integral molding process to facilitate assembly and improve joint strength.

[0046] 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 located in the power cavity 110 with the liquid storage cavity 120, the partition member 600 may have a communication hole 680 that connects the power cavity 110 and the liquid storage cavity 120, and the third flow path 420 of the connecting member 400 can communicate with the liquid storage cavity 120 through the communication hole 680. In order to shorten the distance between the liquid inlet end 310 of the pump mechanism 300 and the liquid storage cavity 120, preferably the communication hole 680 may be located on the pump mechanism 300 side (left side in Figure 4) along the direction of the second axis Y.

[0047] To avoid liquid leakage, the connecting member 400 and the communication hole 680 may preferably be sealed and connected by a second sealing member 820. Specifically, the connecting member 400 may have a second sealing groove on its outer wall, 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, and the second sealing ring may be sealed within the second sealing cavity.

[0048] 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 the pump mechanism 300 side (upper side in Figures 4 and 7) of the receiving cavity 610 along the direction of the first axis X. Here, as shown in Figures 3 to 5 and 7, the partition member 600 can form the receiving opening 620 and the receiving cavity 610 separately. Alternatively, as shown in Figure 6, the partition member 600 can form the receiving opening 620 and the receiving cavity 610 together with the inner shell wall of the housing 100.

[0049] In one possible structure of the partition member 600, referring to Figures 3 to 5 and 7, when the liquid storage cavity 120 is enclosed on the energy source 710 side along the direction of the first axis X, the partition member 600 includes a first portion 630 and a second portion 640 that communicate sequentially along the direction of the first axis X, with the first portion 630 being closer to the pump mechanism 300 than the second portion 640. Here, the inner wall of the first portion 630 may form the housing opening 620 and part of the housing cavity 610, and the inner wall of the second portion 640 may form another part of the housing cavity 610. The shape of the outer wall of the first portion 630 conforms to the shape of the inner wall of the housing 100, the outer wall of the first portion 630 abuts against the inner 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 can be defined between the outer wall of the second portion 640 and the inner wall of the shell of the housing 100.

[0050] 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 that is integrally connected to the first portion 630. The third portion 650 may also have a fourth flow path 651 through which liquid flows, and the fourth flow path 651 may 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 direction of the first axis X in order to shorten 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.

[0051] Referring to Figure 6, in other possible structures of the partition member 600, if a space for arranging an energy source 710 is formed between the liquid storage cavity 120 and the inner shell wall of the housing 100, the partition member 600 may include a fourth portion 660 extending in the direction of the first axis X. Furthermore, at least a portion of the liquid storage cavity 120 may be formed between the fourth portion 660 and a portion of the inner shell wall of the housing 100, and at least a portion of the housing cavity 610 may be formed between the fourth portion 660 and the other portion of the inner shell wall of the housing 100.

[0052] Furthermore, the partition member 600 further includes a fifth portion 670 which can be connected between the fourth portion 660 and the inner wall of the shell of the housing 100, the fifth portion 670 may provide support to the energy source 710 in the direction of the first axis X.

[0053] Referring to Figure 1, the water tank of the relevant oral irrigator is often provided with vents. These vents allow air to flow into the water tank when the pump mechanism 300 draws up water, filling the space where liquid is lost and ensuring communication between the internal cavity of the water tank and the outside world. Because the relevant vents are exposed, they affect the appearance of the oral irrigator 1000. There is also a risk that the vents may be blocked or that the operation of the water pump may be affected when the device is gripped. Furthermore, designing the vents inside the device requires adding ventilation lines to the internal cavity space, which increases the design difficulty.

[0054] In view of the above technical problems, the inventors of this application considered that the device's exterior could be made non-porous by disassembling the machine into two parts that can nest together and using the assembly gap between these two parts to enable communication between the internal cavity of the water tank and the outside world. However, precisely controlling the assembly gap is difficult, and even on the same production line, some products have a large assembly gap that causes liquid leakage, while others have a small assembly gap that makes it difficult for external gas to pass through. Therefore, the inventors of this application considered forming a microchannel between the fitting surfaces of these two parts and setting the cross-section of the microchannel to be smaller so as to allow gas flow while blocking liquid leakage. The assembly gap can be made slightly larger to facilitate the passage of external gas and to ensure that there is no significant difference in the assembly gap between products on the same production line.

[0055] Specifically, referring to Figure 3, the housing 100 may include a shell 130 and a cover body 140. The shell 130 includes a top wall and side walls, the side walls of the shell 130 being connected to the outer circumference of the top wall of the shell 130 and extending along the direction of the first axis X. A through hole 530 may be formed in the top wall of the shell 130 through which the output shaft 210 of the motor 200 passes. The shell 130 may have an opening, which may be located at one end of the shell 130 in the direction of the first axis X and facing the top wall of the shell 130, as shown in Figure 3. Alternatively, the opening may be located in the side wall of the shell 130.

[0056] The cover body 140 can cover the opening of the shell 130, and can surround the shell 130 to form an internal cavity of the shell. The cover body 140 and the shell 130 may be arranged nested to each other along a predetermined direction. This predetermined direction may be the direction of the first axis X, or a direction intersecting the first axis X.

[0057] Specifically, the cover body 140 may include a bottom wall and side walls, and the side walls of the cover body 140 may extend in a direction connected to the outer circumference of the bottom wall of the cover body 140, and the side walls and bottom wall of the cover body 140 may form an internal cavity of the cover body 140 with one end open. The side walls of the cover body 140 may be embedded in the internal cavity of the shell 130, as shown in Figure 3. Alternatively, the side walls of the cover body 140 may be fitted over the outside of the shell 130. Furthermore, the cover body 140 and the shell 130 can form at least a portion of the liquid storage cavity 120.

[0058] Referring to Figures 8 and 9, the cover body 140 may have a first fit surface 145, and the shell 130 may have a second fit surface 131 positioned opposite the first fit surface 145, and an assembly gap 190 can be formed between the first fit surface 145 and the second fit surface 131. For example, in Figure 3, the cover body 140 may be embedded in the internal cavity of the shell 130, the outer surface of the cover body 140 embedded in the shell 130 may be the first fit surface 145, and the outer surface of the shell 130 fitted over the outside of the cover body 140 may be the second fit surface 131. Furthermore, the cover body 140 may be fitted over the outside of the shell 130, the inner surface of the cover body 140 may be the first fit surface 145, and the outer surface of the shell 130 may be the second fit surface 131. In this way, the gas flow channel can be hidden inside the device so that it is not blocked, and there are advantages such as easy ventilation and a non-porous appearance.

[0059] Furthermore, a microchannel 180 may be formed between the shell 130 and the cover body 140. The microchannel 180 can allow gas to pass in the direction of the first axis X and block the outflow of liquid. The microchannel 180 uses the assembly gap 190 between the shell 130 and the cover body 140 to connect the liquid storage cavity 120 with the outside world. Preferably, in a preset direction, the liquid storage cavity 120 may be higher than the microchannel 180. Therefore, the water level in the liquid storage cavity 120 can be higher than that of the microchannel 180.

[0060] Specifically, the liquid level in the liquid storage cavity 120 may be higher than that of the microchannel 180, which can create a pressure difference between the external air pressure (1 atmosphere) and the air pressure in the liquid storage cavity 120 (less than 1 atmosphere). This pressure difference allows for gas flow while blocking liquid leakage, thus achieving the objectives of ventilation and leak prevention. It should be noted that "blocking liquid leakage" can be broadly understood to mean that the microchannel 180 can block liquid leakage when the oral irrigator 1000 is stationary or when the user is holding it normally. On the other hand, if the user shakes it violently, the surface tension may be broken, affecting the air pressure and potentially causing liquid to leak from the microchannel 180.

[0061] The method for forming the microchannel 180 will be described below with reference to Figures 8 and 9. Specifically, a third seal groove 141 having an outward-facing opening may be provided in one side wall of the shell 130 and the cover body 140. The other side wall of the shell 130 and the cover body 140 can surround the third seal cavity 142 together with the third seal groove 141, and the third seal cavity 142 can communicate with the liquid storage cavity 120 and the outside world through the assembly gap 190. A gas flow groove 143 having an opening facing the third seal cavity 142 may be provided at the bottom of the third seal groove 141.

[0062] For example, in Figures 8 and 9, the cover body 140 is embedded in the internal cavity of the shell 130, and a third seal groove 141 having an outward-facing opening may be provided in the side wall of the cover body 140. The side wall of the shell 130 can surround the third seal cavity 142 together with the third seal groove 141. In another example, the cover body 140 is fitted over the outside of the shell 130, and a third seal groove 141 having an outward-facing opening may be provided in the side wall of the shell 130. The side wall of the cover body 140 can surround the third seal cavity 142 together with the third seal groove 141.

[0063] Figure 10 is a cross-sectional view of the housing 100 in a location other than the gas flow groove 143 provided in the embodiment of this application. Referring to Figure 10, the housing 100 may further include a third sealing member 830 sandwiched between the inner wall of the other of the shell 130 and the cover 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, polygonal, etc., and the cross-sectional shape of the third sealing member 830 is not particularly limited in the embodiment of this application.

[0064] Continuing to refer to Figures 8 and 9, a microchannel 180 is formed between the surface of the third seal member 830 near the gas flow groove 143 and the gas flow groove 143. In this way, the seal cavity is sealed by the third seal member 830 in areas other than the gas flow groove 143. A microchannel 180 is formed in the gas flow groove 143 to allow gas to flow and block the flow of liquid. Since the machining depth of the gas flow groove 143 is generally relatively precise, the size of the formed microchannel 180 can be precisely controlled. Thus, the housing 100 provided by the embodiment of this application can achieve not only permeability and liquid sealing but also high yield. Furthermore, when the pump mechanism 300 sucks up liquid, the third seal member 830 is crushed and deformed, increasing the assembly gap and making it easier to draw in air.

[0065] The liquid level difference h formed by the highest liquid level height of the liquid storage cavity 120 and the height of the horizontal plane where the gas flow groove 143 is located satisfies the condition 0 < ρ * g * h ≤ 30% * Po, where ρ represents the density of air, g represents the density of liquid, and Po represents 1 atmosphere.

[0066] Specifically, the greater the difference between the liquid pressure inside the liquid storage cavity 120 and the external atmospheric pressure, the more gas can flow from the outside into the liquid storage cavity 120, thus preventing liquid leakage. Conversely, the smaller the difference between the liquid pressure inside the liquid storage cavity 120 and the external atmospheric pressure, the less gas can flow from the outside into the liquid storage cavity 120, potentially leading to liquid leakage. The inventors of this application have verified that when the liquid level difference h satisfies the above conditions, the microchannel 180 can allow gas to pass through while blocking liquid leakage.

[0067] To further block liquid leakage, the liquid level difference h can satisfy 0 < ρ*g*h ≤ 20%*Po. Also, to further block liquid leakage, the liquid level difference h can 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.

[0068] Furthermore, the depth of the gas flow groove 143 may be in the range of 0.1 mm to 0.4 mm in order to allow gas to pass through while easily blocking the passage of liquid. For example, the depth of the gas flow groove 143 may be 0.1 mm, 0.3 mm, 0.4 mm, etc. Furthermore, the depth of the gas flow groove 143 may be in the range of 0.25 mm to 0.34 mm in order to further improve air permeability and liquid barrier properties. For example, the depth of the gas flow groove 143 may be 0.25 mm, 0.30 mm, 0.34 mm, etc.

[0069] The third seal groove 141 may have two groove side walls that are positioned opposite each other in a predetermined direction, as shown in Figures 8 and 9, and the groove bottom wall of the third seal groove 141 may be connected between the two groove side walls. Alternatively, the third seal groove 141 may have one groove side wall used to support one side of the third seal member 830.

[0070] If the third seal member 830 has two groove side walls, in order to allow gas to flow in and out of the third seal cavity 142, for example, referring to Figure 8, the height of the third seal member 830 may be lower than the height of the groove bottom wall in a preset direction. In this way, a channel communicating with the microchannel 180 can be formed between the third seal member 830 and one groove side wall, and a channel communicating with the microchannel 180 can also be formed between the third seal member 830 and the other groove side wall. In this way, gas that enters the third seal cavity 142 can flow out of the third seal cavity 142 after bypassing the third seal member 830 at least half a turn, as shown by the arrows in Figure 8. Furthermore, the gas flow groove 143 can penetrate the groove bottom wall along a preset direction, as shown in Figure 11.

[0071] As another example, referring to Figure 9, guide grooves 144 are provided in both inner walls, each having an opening facing the third seal cavity 142, and a gas channel is formed between the guide grooves 144 and the third seal member, and the channel may communicate with a microchannel 180. Gas that enters the third seal cavity 142 bypasses the third seal member 830 at least half a turn via the channel and microchannel 180 as shown by the arrows in Figure 9, before flowing out of the third seal cavity 142. Furthermore, the guide grooves 144 may penetrate the side walls of the grooves in a direction perpendicular to the groove bottom wall.

[0072] Similarly, if the third sealing member 830 has one 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 arranging a guide groove 144 on the groove side wall.

[0073] Preferably, referring to Figure 11, the circumferential length of the gas flow groove 143 is shorter than the circumferential length of the seal groove. There may be one or more gas flow grooves 143. If there are multiple gas flow grooves 143, they may be spaced apart.

[0074] Preferably, the cover body 140 is detachably connected to the shell 130 so that when it is necessary to drain the liquid from the liquid storage cavity 120, the cover body 140 can be removed from the shell 130 to achieve the purpose of rapid liquid drainage.

[0075] 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. To facilitate assembly, the mounting member 500 is fixed to the inner wall of the housing 100, and both the motor 200 and the pump mechanism 300 can be attached to the mounting member 500. In this way, during assembly, the motor 200 and the pump mechanism 300 are first assembled to the mounting member 500, and then the two can be mounted together as a single assembly inside the housing 100.

[0076] Furthermore, since both the motor 200 and the pump mechanism 300 generate vibrations during operation, the reliability of the connection 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 the connection is very prone to detachment. In view of 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 into a connecting member 400 and a mounting member 500 to reduce resonance and improve the reliability of the connection between the second flow path 410 of the connecting member 400 and the liquid discharge end 320 of the pump mechanism 300.

[0077] Specifically, referring to Figures 13 to 16, the second valve portion 321 of the liquid discharge end 320 may be integrated into the mounting member 500, and the second end cap portion 322 of the liquid discharge end 320 may be integrated into the connecting member 400. The power end 330, at least a portion of the connecting member 400, and at least a portion of the mounting member 500 may be arranged in order along the liquid discharge direction of the liquid discharge end 320 (direction of the second axis Y) and connected by a third clamping member 923. In this way, the mounting member 500 is isolated from the connecting member 400 and the power end 330 of the pump mechanism 300, thereby transmitting most of the vibrations of the pump body to the mounting member 500. A vibration damping member may be placed between the mounting member 500 and the inner wall of the housing 100. The mounting member 500 can eliminate vibrations through vibration damping connections, and furthermore, the vibrations transmitted from the power end 330 of the pump mechanism 300 to the connecting member 400 are small or even nonexistent. This reduces the impact of vibrations from the power end 330 of the pump mechanism 300 on the connecting member 400, improving the reliability of the connection at the point where the second flow path 410 of the connecting member 400 and the liquid discharge end 320 of the pump mechanism 300 communicate. In addition, integrating the liquid discharge end 320 into the mounting member 500 and the connecting member 400 not only simplifies assembly but also shortens the waterway and improves connection reliability.

[0078] Preferably, the power end 330 may include a pump housing 331 and a piston 332, and one end of the pump housing 331 may have an opening. The mounting member 500 covers the opening, and the mounting member 500 and the pump housing 331 can enclose the 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 has a liquid discharge hole that passes through the mounting member 500 and communicates with the pump chamber of the pump mechanism 300, and a second valve portion 321 of the liquid discharge end 320 is provided in the liquid discharge hole, and the second valve portion 321 of the liquid discharge end 320 can allow liquid to be pumped out of the pump chamber through the liquid discharge hole and prevent liquid from flowing into the pump chamber through the liquid discharge hole.

[0079] Specifically, the piston 332 reciprocates within the pump chamber, thereby allowing the liquid in the pump chamber to be pumped out through the liquid discharge port. The valve portion of the liquid discharge end 320 has a one-way function to prevent the liquid from returning to the pump chamber through the liquid discharge port. In this embodiment, the objective is also achieved by using the mounting member 500 to form the pump chamber and the liquid discharge port and to integrate the valve portion of the liquid discharge end 320.

[0080] Preferably, referring to Figure 16, the power end 330 may further include a drive member 333 having a drive shaft that rotates relative to the pump housing 331. This drive shaft can drive an eccentric wheel to rotate relative to the pump housing 331, and the eccentric wheel can push the piston 332 back and forth.

[0081] Referring to Figures 15 to 17, preferably, at least a portion of the connecting member 400 and the second end cap portion 322 of the liquid discharge end 320 may be a single part manufactured using an integral molding process. The second end cap portion 322 of the liquid discharge end 320 can 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 cap portion 322 of the liquid discharge end 320.

[0082] Specifically, the liquid discharge channel of the second end cap 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 configuration, by making the connecting member 400 and the second end cap portion 322 of the liquid discharge end 320 a single component, the liquid discharge channel and the second flow path 410 are integrated, which is beneficial in improving the reliability of the connection at the communication point, and is beneficial in improving the smoothness of the liquid flow and the ease of assembly.

[0083] Preferably, the mounting member 500 may have a liquid intake hole 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 intake end 310 may be provided in the liquid intake hole. Furthermore, the first valve portion 311 of the liquid intake end 310 may allow the liquid to be pumped up into the pump chamber through the liquid intake hole, while preventing the liquid from flowing out of the liquid intake hole.

[0084] Specifically, the piston 332 moves back and forth within the pump chamber, thereby pumping the liquid from the liquid inlet into the pump chamber. The valve portion of the liquid inlet end 310 has a one-way function to prevent liquid from flowing out of the liquid inlet. In this configuration, the mounting member 500 is used to form the pump chamber and the liquid inlet, and the objective of integrating the first valve portion 311 of the liquid inlet end 310 is also achieved.

[0085] Preferably, at least a portion of the connecting member 400 and the first end cap portion 312 of the liquid inlet end 310 may be a single part formed by an integral molding process. The first end cap portion 312 of the liquid inlet end 310 can cover the liquid inlet hole, and a liquid inlet channel communicating with the liquid inlet hole is formed in the first end cap portion 312 of the liquid inlet end 310, and the liquid inlet channel may communicate with the third channel 420 of the connecting member 400. In this way, the liquid inlet channel of the first end cap portion 312 of the liquid inlet end 310 can guide the flow direction of the liquid flowing into the liquid inlet hole. In this embodiment, by making the connecting member 400 and the first end cap portion 312 of the liquid inlet end 310 a single part, the liquid inlet channel and the third channel 420 are integrated, which is beneficial in improving the reliability of the connection at the communication point, and is beneficial in improving the smoothness of liquid flow and the convenience of assembly.

[0086] Referring to Figures 13 to 16, preferably, the mounting member 500 includes a first mounting portion 510, which may have a first and second side that are positioned opposite 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 on the first side of the first mounting portion 510 along the axial direction of the output shaft 210. A portion of the connecting member 400 into which the second end cap portion 322 of the liquid discharge end 320 is integrated may be positioned on the second side of the first mounting portion 510. The mounting member 500 has a through hole 530 through which the connecting member 400 passes, and the through hole 530 may restrict at least one side of the connecting member 400 in the axial direction of the output shaft 210. By restricting the connecting member 400 using the through hole 530 in this way, upward support and restriction of the connecting member 400 can be facilitated, and vertical vibration of the connecting member 400 can be avoided. Preferably, the circuit board 720 may 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 damping member 914 may be positioned between the circuit board 720 and the inner wall of the housing 100.

[0087] Referring to Figures 12 and 13, preferably, the mounting member 500 further includes a second mounting portion 520 connected to the first side of the first mounting portion 510, and a housing space for surrounding the outer surface of the motor 200 is formed by the second mounting portion 520 and the first mounting portion 510. In this way, since the mounting member 500 is enclosed by the outer surface of the motor 200, most of the vibrations of the motor 200 are transmitted to the mounting member 500, and further vibrations transmitted from the motor 200 to the connecting member 400 are reduced or not occurred at all. In this way, the influence of vibrations of 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. Preferably, referring to Figure 13, the first mounting portion 510 and the second mounting portion 520 may be fastened together by a second fastening member 922.

[0088] Preferably, a vibration damping 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 damping member can reduce the transmission of vibrations between the motor 200 and the mounting member 500. For example, in Figure 13, the second vibration damping member 912 is sandwiched between the front end of the motor 200 and the mounting member 500, and the third vibration damping member 913 is sandwiched between the rear end of the motor 200 and the mounting member 500.

[0089] Referring to Figure 17, preferably, the connecting member 400 has a mounting groove 450 through which the output shaft 210 of the motor 200 passes, and 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 are in communication at the portion of the mounting groove 450, and a sealing member may be placed to prevent leakage of liquid at the communication point.

[0090] Continuing to refer to Figure 17, preferably, the motor 200 may include a motor body 220 and an output shaft 210. The output shaft 210 of the motor 200 is positioned to pass through the motor body 220, and both axial ends of the output shaft 210 may protrude through the motor body 220. A restricting space for restricting the fourth seal member 840 may be formed by the bottom surface of the motor body 220 and the inner groove wall of the mounting groove 450. This restricting space can restrict both ends of the fourth seal member 840 in the axial direction of the output shaft 210. In this way, the fourth seal member 840 is restricted by utilizing the bottom surface of the motor body 220 of the motor 200 and the groove bottom wall of the mounting groove 450, so that movement of the fourth seal member 840 due to vibration can be avoided.

[0091] Referring to Figure 17, the second flow path 410 may include a first flow section 411 and a second flow section 412 that are connected in sequence. The first flow section 411 is connected to the liquid discharge end 320 and may extend along the direction of the first axis X, with a gap in the second axial direction between the first flow section 411 and the first flow path 211. The second flow section 412 may be connected to the first flow section 411 and the first flow path 211, and the second flow section 412 may include a first arc section 4121, with a transition between the first arc section 4121 and the first flow section 411 via an arc. By utilizing the arc transition, the resistance of the flow path wall to the liquid is reduced, facilitating the flow of the liquid.

[0092] Furthermore, the first arc section 4121 may be higher than the pump mechanism 300, and the first arc section 4121 may have an arc center facing the pump mechanism 300. This allows the liquid to flow relatively smoothly toward the first flow path 211, further reducing the resistance of the flow path inner wall to the liquid.

[0093] Preferably, the second flow section 412 further includes a second arc section 4122, and the transition between the second arc section 4122 and the first flow path 211 is via an arc. This arc transition reduces the resistance of the inner wall of the flow path to the liquid, thereby facilitating the flow of the liquid.

[0094] Furthermore, since the second arc section 4122 has an arc center facing the motor 200, the second arc section 4122 smoothly contacts the first flow path 211, facilitating the flow of liquid.

[0095] Referring to Figures 17 and 18, preferably, the connecting member 400 may include a first connecting portion 430 and a second connecting portion 440 that are connected. The first connecting portion 430 may have a first flow section 411 and a conversion cavity 431 communicating with the first flow section 411, the conversion cavity 431 may have a first inner arcuate surface 432, and the conversion cavity 431 may have an opening in the direction of the first axis X. At least a portion of the second connecting portion 440 may be built into the conversion cavity 431 from the opening of the conversion 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 surround each other to form a second flow section 412.

[0096] Specifically, the second connecting section 440 may include a cover plate section 442, a projection section 443, and a baffle section 444. The projection section 443 and the baffle section 444 may be connected to both sides of the cover plate section 442 in the direction of the first axis X, respectively. The cover plate section 442 can cover the conversion cavity 431, and the baffle section 444 may be located inside the conversion cavity 431 and have a second inner arcuate surface 441. A through hole may be formed in the cover plate section 442, the projection section 443 may surround the outside of the through hole, and the internal cavity of the projection section 443 may communicate with the through hole. The output shaft 210 is positioned to pass through the internal cavity and through hole of the projection section 443, and a fourth sealing member 840 may be provided between the output shaft 210 and the internal cavity wall of the projection section 443. In this way, the above-described mounting groove 450 can be formed by the projection section 443 and a portion of the cover plate section 442.

[0097] Here, terms such as "upper" and "lower" are used to describe the relative positional relationships of each structure in the drawings, and are used solely to facilitate clarity of explanation, and are not used to limit the scope of this application. Unless there is a substantial change in the technical content, any change or adjustment of the relative relationships shall also be considered within the scope of this application.

[0098] In this application, unless otherwise explicitly stated or limited, the position of the first feature "above" or "below" the second feature means that the first and second features may be in direct contact, or they may be indirectly in contact via an intermediate medium. Furthermore, the position of the first feature "above," "above," and "on the top surface" of the second feature means that the first feature may be directly above or diagonally above the second feature, or it may simply indicate that the horizontal height of the first feature is higher than that of the second feature. The position of the first feature "below," "below," and "on the bottom surface" of the second feature means that the first feature may be directly below or diagonally below the second feature, or it may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0099] Furthermore, in this application, unless otherwise explicitly stated or limited, terms such as “attachment,” “connection,” “linking,” and “fixing” should be understood in a broad sense, for example, as fixed connections, removable connections, or integrated connections. They may also be direct connections, indirect connections via an intermediate medium, internal communication between two elements, or interaction relationships between two elements. Those skilled in the art will understand the specific meaning of these terms in this application depending on the specific circumstances.

[0100] In this specification, the following reference terms are used: “one example,” “several examples,” “exemplary example,” “example,” “specific example,” or “several examples.” These reference terms mean that the specific features, structures, materials, or properties described in connection with the example are included in at least one example of this disclosure. In this specification, the general descriptions of these terms do not necessarily refer to identical examples. Furthermore, the specific features, structures, materials, or properties described may be combined in appropriate forms in any one or more examples.

[0101] Finally, it should be noted that the embodiments described above are used solely to illustrate the technical solutions of this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments described above, those skilled in the art should understand that the technical solutions described in the embodiments described above can still be modified, or some or all of their technical features can be replaced with equivalents. However, these modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. [Explanation of symbols]

[0102] 1000 Oral irrigator, 100 Housing, 110 Power cavity, 120 Liquid storage cavity, 130 Shell, 131 Second fit surface, 140 Cover body, 141 Third seal groove, 142 Third seal cavity, 143 Gas flow groove, 144 Guide groove, 145 First fit surface, 160 Upper end, 170 Lower end, 180 Microchannel, 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 housing, 332 Piston, 333 Drive member, 400 410 Connecting member, 410 Second flow path, 411 First flow section, 412 Second flow section, 4121 First arc section, 4122 Second arc section, 420 Third flow path, 430 First connecting section, 431 Conversion cavity, 432 First inner arc surface, 440 Second connecting section, 441 Second inner arc surface, 442 Cover plate section, 443 Protrusion section, 444 Baffle section, 450 Mounting groove, 500 Mounting member, 510 First mounting section, 520 Second mounting section, 530 Through hole, 600 Partition member, 610 Housing cavity, 620 Housing 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 damping member, 912 second vibration damping member, 913 third vibration damping member, 914 fourth vibration damping member, 921 first fastening member, 922 second fastening member, 923 third fastening member, 2000 cleaning part, 2100 brush body, 2200 cavity, 2300 outlet.

Claims

1. A housing for oral cleaning comprising a shell (130) and a cover body (140), The shell (130) has an opening, the cover body (140) covers the opening of the shell (130), the cover body (140) and the shell (130) are nested together along a predetermined direction, and the cover body (140) and the shell (130) define a liquid storage cavity (120). A housing for oral cleaning is characterized in that a microchannel (180) is formed between the shell (130) and the cover body (140), the microchannel (180) can allow gas to pass along the predetermined direction and block the outflow of liquid, and the microchannel (180) communicates the liquid storage cavity (120) with the outside world using the assembly gap (190) between the shell (130) and the cover body (140).

2. A seal groove (141) having an outward-facing opening is provided in one side wall of the shell (130) and the cover body (140), and a seal cavity (142) is formed surrounded by the other side wall of the shell (130) and the cover body (140) and the seal groove (141), the seal cavity (142) communicates the liquid storage cavity (120) with the outside world via the assembly gap (190), and a gas flow groove (143) having an opening facing the seal cavity (142) is provided in the groove bottom wall of the seal groove (141). The housing (100) further comprises a sealing member (830) sandwiched between the inner wall of the other side of the shell (130) and the cover body (140) and the bottom wall of the seal groove (141), wherein the microchannel (180) is formed between the surface of the sealing member (830) near the gas flow groove (143) and the gas flow groove (143), as described in claim 1.

3. The liquid level difference h formed by the highest liquid level height of the liquid storage cavity (120) and the height of the horizontal plane where the gas flow groove (143) is located is The oral irrigation housing according to claim 2, characterized in that it satisfies the condition 0 < ρ * g * h ≤ 30% * Po, where ρ represents air density, g represents liquid density, and Po represents 1 atmosphere.

4. The housing for oral cleaning according to claim 3, characterized in that the height difference h satisfies the condition 0 < ρ * g * h ≤ 20% * Po.

5. The housing for oral cleaning according to claim 3, characterized in that the height difference h satisfies the condition 0 < ρ * g * h ≤ 10% * Po.

6. The housing for oral cleaning according to claim 5, characterized in that the depth of the gas flow groove (143) is in the range of 0.1 mm to 0.4 mm.

7. The housing for oral cleaning according to claim 6, characterized in that the depth of the gas flow groove (143) is in the range of 0.25 mm to 0.35 mm.

8. The seal groove (141) has a groove bottom wall and two groove side walls, and the two groove side walls are connected to both sides of the groove bottom wall along the predetermined direction. The oral cleaning housing according to claim 5, characterized in that, in the predetermined direction, the height of the sealing member (830) is lower than the height of the groove bottom wall.

9. The housing for oral cleaning according to claim 8, characterized in that the gas flow groove (143) penetrates the bottom wall of the groove along the predetermined direction.

10. The seal groove (141) has a groove bottom wall and two groove side walls, and the two groove side walls are connected to both sides of the groove bottom wall along the predetermined direction. Both of the inner walls are provided with guide grooves (144) having openings facing the seal cavity (142), and a channel for gas flow is formed between the guide grooves (144) and the seal member (830), and the channel is in communication with the microchannel (180). The oral cleaning housing according to claim 5, characterized in that the gas that enters the seal cavity (142) flows through the channel and the microchannel (180) and around the seal member (830) for at least half a turn before flowing out of the seal cavity (142).

11. The oral cleaning housing according to claim 10, characterized in that the guide groove (144) penetrates the side wall of the groove in a direction perpendicular to the bottom wall of the groove.

12. The housing for oral cleaning according to any one of claims 5 to 11, characterized in that the circumference of the gas flow groove (143) is shorter than the circumference of the seal groove (141).

13. An oral irrigator comprising a pump mechanism (300), a cleaning component (2000), and a housing (100) for oral irrigation according to any one of claims 1 to 12, wherein the pump mechanism (300) is disposed in an internal cavity of the housing (100), the cleaning component (2000) has a cavity (2200) and an outlet (2300) communicating with each other, the cavity (2200) of the cleaning component (2000) is communicated with the liquid discharge end (320) of the pump mechanism (300), and the pump mechanism (300) pumps the liquid in the liquid storage cavity (120) up to the cavity (2200) of the cleaning component (2000) and discharges it from the outlet (2300).

14. The oral irrigator according to claim 13, characterized in that the cleaning component (2000) further includes brush bristles.

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