Housing for oral cleaning and oral cleaning apparatus

Abstract

Embodiments of the present application provide a housing for oral cleaning and an oral cleaning apparatus. The housing comprises a shell and a cover. The shell has an opening, and the cover seals the opening of the shell. The cover and the shell are nested with each other along a preset direction, and the cover and the shell define a liquid storage cavity. A microchannel is formed between the shell and the cover. The microchannel is capable of allowing gas to pass through along the preset direction and blocking liquid from flowing out, and the microchannel utilizes an assembly gap between the shell and the cover to enable communication between the liquid storage cavity and the external environment. The housing for oral cleaning and the oral cleaning apparatus provided by the embodiments of the present application achieve the effect of being hole-free in appearance, breathable, and waterproof.

Description

Housing for oral cleaning and oral cleaning device

[0001] The present application claims priority to the Chinese patent application No. 202410594637.1, filed on May 13, 2024, and entitled "Housing for oral cleaning and oral cleaning device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of oral cleaning appliances, and in particular to a housing for oral cleaning and an oral cleaning device. BACKGROUND

[0003] With the increasing importance of oral care, electric toothbrushes and oral irrigators have gradually become common oral care tools in families. Among them, the electric toothbrush uses a motor to make the brush head vibrate at a high frequency, so as to instantaneously decompose toothpaste into fine foam and deeply clean the interdental space. The oral irrigator uses a water pump to pump out a high-speed water column with a certain pressure, so as to realize the cleaning of teeth and interdental spaces by using the impact force of the high-speed water column.

[0004] The related oral cleaning device can include a body, a cleaning accessory, a motor, a water pump, and a water tank. The cleaning accessory is arranged at the head of the body, and the motor, the water pump, and the water tank are arranged inside the body. The output shaft of the motor has a flow channel for water flow, and the flow channel is in communication with the water tank. The cleaning accessory has a cavity and a flow outlet in communication with the cavity, the output shaft of the motor penetrates the cavity, and the flow channel of the output shaft of the motor is in communication with the flow outlet, so that the liquid in the water tank can be sprayed out of the flow outlet under the action of the water pump.

[0005] The body of the related oral cleaning device is provided with a vent hole, so that air flow can enter the water tank through the vent hole when the water pump is pumping water. However, these vent holes are sometimes designed on the appearance surface of the body. When the user holds the body, there is a risk of blocking the vent hole and affecting the work of the water pump.

[0006] SUMMARY

[0007] The purpose of the present application is to provide a housing for oral cleaning and an oral cleaning device, which can take into account the appearance design while using the microstructure of the sealing cover to realize the hidden vent hole design, and solve the problem that the user will block the exposed vent hole when holding the body, affecting the work of the water pump, without increasing the design cost of additional internal vent pipe.

[0008] To achieve the above object, one aspect of the embodiment of the present application provides a casing for oral cavity cleaning, comprising a shell and a cover, the shell having an opening, the cover covering the opening of the shell; the cover and the shell are nested with each other along a preset direction, and the cover and the shell define a liquid storage cavity; a micro channel is formed between the cover and the shell; the micro channel allows gas to pass through along the preset direction and blocks liquid from flowing out, and the micro channel communicates the liquid storage cavity with the outside world through an assembly gap between the cover and the shell.

[0009] Optionally, a side wall of one of the shell and the cover is provided with a sealing groove having an opening facing the outside; a side wall of the other of the shell and the cover and the sealing groove enclose a sealing cavity, the sealing cavity communicates the liquid storage cavity with the outside world through the assembly gap, a groove bottom wall of the sealing groove is provided with an airflow groove having an opening facing the sealing cavity; the casing further comprises a sealing member clamped between the inner side wall of the other of the shell and the cover and the groove bottom wall of the sealing groove, and a surface of the sealing member close to the airflow groove forms the micro channel between the sealing member and the airflow groove.

[0010] Optionally, in the preset direction, a liquid level difference h formed by the highest liquid level of the liquid storage cavity and the height of the horizontal plane where the airflow groove is located satisfies the following condition: 0 < ρ * g * h ≤ 30% * Po; wherein ρ represents air density; g represents liquid density; and Po represents one atmospheric pressure.

[0011] Optionally, the height difference h satisfies the following condition: 0 < ρ * g * h ≤ 20% * Po.

[0012] Optionally, the height difference h satisfies the following condition: 0 < ρ * g * h ≤ 10% * Po.

[0013] Optionally, the depth of the airflow groove ranges from 0.1 mm to 0.4 mm.

[0014] Optionally, the depth of the airflow groove ranges from 0.25 mm to 0.35 mm.

[0015] Optionally, the sealing groove has a groove bottom wall and two groove side walls connected to both sides of the groove bottom wall along the preset direction; in the preset direction, the height of the sealing member is less than the height of the groove bottom wall.

[0016] Optionally, the airflow groove penetrates through the groove bottom wall along the preset direction.

[0017] Optionally, the sealing groove has a groove bottom wall and two groove side walls connected to two sides of the groove bottom wall along the extension direction of the side wall of the cover body; the two inner side walls are each provided with a flow guide groove having an opening facing the sealing cavity, and a channel for gas flow is formed between the flow guide groove and the sealing member, the channel being in communication with the micro channel; the gas entering the sealing cavity flows out of the sealing cavity after flowing through the channel and the micro channel around the sealing member for at least half a circle.

[0018] Optionally, the flow guide groove penetrates the groove side wall along a direction perpendicular to the groove bottom wall.

[0019] Optionally, the circumferential length of the gas flow groove is shorter than the circumferential length of the sealing groove.

[0020] Another aspect of the embodiments of the present application provides an oral cavity cleaning device, comprising a pump mechanism, a cleaning accessory and a casing for oral cavity cleaning as described above, the pump mechanism being arranged in the inner cavity of the casing, the cleaning accessory having a cavity and a flow outlet in communication, the cavity of the cleaning accessory being in communication with the liquid outlet end of the pump mechanism, and the pump mechanism pumping the liquid in the liquid storage cavity into the cavity of the cleaning accessory and out of the flow outlet.

[0021] Optionally, the cleaning accessory further comprises a bristle.

[0022] The casing for oral cavity cleaning and the oral cavity cleaning device provided by the embodiments of the present application have the advantages that the cover body is inserted into the casing from the opening of the casing and covers the opening of the casing, and a liquid storage cavity is formed between the cover body and the casing higher than the cover body. A micro channel is formed between the outer surface of the cover body and the inner casing wall of the casing, the micro channel is in communication with the outside through the assembly gap between the cover body and the casing, the flow channel of the gas is hidden inside the casing, so that the flow channel of the gas is not blocked, and the effect of facilitating ventilation is achieved. In addition, the micro channel has a small pore size, which can allow the gas to flow and block the liquid from flowing out under the action of the atmospheric pressure outside and the negative pressure in the liquid storage cavity, so as to achieve the effects of ventilation and leakage prevention. BRIEF DESCRIPTION OF DRAWINGS

[0023] FIG. 1 is a schematic diagram of a related oral cavity cleaning device;

[0024] FIG. 2 is a schematic diagram of an oral cavity cleaning device provided by an embodiment of the present application;

[0025] FIG. 3 is a longitudinal sectional view of the oral cavity cleaning device shown in FIG. 2;

[0026] FIG. 4 is another longitudinal sectional view of the oral cavity cleaning device shown in FIG. 2;

[0027] FIG. 5 is an internal layout diagram of an oral cavity cleaning device provided by an embodiment of the present application;

[0028] Figure 6 is another internal layout diagram of the oral cleaning device provided in an embodiment of this application;

[0029] Figure 7 is a cross-sectional view of the separator shown in Figure 4;

[0030] Figure 8 is a partial cross-sectional view of a housing at the airflow slot provided in an embodiment of this application;

[0031] Figure 9 is a partial cross-sectional view of another housing provided in an embodiment of this application at the airflow slot;

[0032] Figure 10 is a partial cross-sectional view of the housing provided in an embodiment of this application at a location other than the airflow channel;

[0033] Figure 11 is a schematic diagram of the cover and the third sealing ring provided in an embodiment of this application;

[0034] Figure 12 is an exploded view of the oral cleaner provided in an embodiment of this application;

[0035] Figure 13 is an exploded view of the motor, connectors, mounting components, and circuit board shown in Figure 12;

[0036] Figure 14 is an assembly perspective view of the mounting components, connectors, and pump mechanism shown in Figure 13;

[0037] Figure 15 is an exploded view of the connector, mounting parts, and motor of the oral cleaner provided in the embodiment of this application;

[0038] Figure 16 is an exploded view of the pump mechanism, mounting components, and connectors shown in Figure 15;

[0039] Figure 17 is a partial schematic diagram of Figure 3;

[0040] Figure 18 is an exploded view of a connector provided in an embodiment of this application.

[0041] Reference numerals: 1000, oral cleaning device; 100, casing; 110, power cavity; 120, liquid storage cavity; 130, housing; 131, second mating surface; 140, cover; 141, third sealing groove; 142, third sealing cavity; 143, airflow groove; 144, flow guide groove; 145, first mating surface; 160, top end; 170, bottom end; 180, micro channel; 190, assembly gap; 200, motor; 210, output shaft; 211, first flow channel; 220, motor body; 300, pump mechanism; 310, liquid inlet end; 311, first valve part; 312, first end cover part; 320, liquid outlet end; 321, second valve part; 322, second end cover part; 330, power end; 331, pump housing; 332, piston; 333, driving member; 400, connecting member; 410, second flow channel; 411, first flow section; 412, second flow section; 4121, first arc section; 4122, second arc section; 420, third flow channel; 430, first connecting part; 431, reversing cavity; 432, first inner arc surface; 440, second connecting part; 441, second inner arc surface; 442, cover plate section; 443, protrusion section; 444, baffle section; 450, mounting groove; 500, mounting member; 510, first mounting part; 520, second mounting part; 530, through hole; 600, partition member; 610, containing cavity; 620, containing opening; 630, first part; 640, second part; 650, third part; 651, fourth flow channel; 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 damping member; 912, second damping member; 913, third damping member; 914, fourth damping member; 921, first fastening member; 922, second fastening member; 923, third fastening member; 2000, cleaning accessory; 2100, brush body; 2200, cavity; 2300, flow outlet. DETAILED DESCRIPTION

[0042] FIG. 1 is a schematic view of a related oral cleaning device. Referring to FIG. 1, the body of the related oral cleaning device is of an elongated type, wherein a water tank is arranged at the right side of the body, and a motor, a water pump and a battery are arranged at the left side of the body. The longitudinal length of the water tank is almost equal to that of the body, and the water tank has a small caliber, which makes it difficult for a user to clean the inner wall of the water tank. In addition, the water pump is arranged at the left middle position of the body, and the input end a and the output end b of the water pump are arranged at the upper portion of the water pump, which results in a too long longitudinal distance between the input end a of the water pump and the bottom of the water tank, and thus a long water path between them, which is not conducive to the water pump to suck the liquid in the water tank.

[0043] To solve the above technical problems, the present inventors have conceived to arrange the water tank at the lower part of the machine body, and arrange the motor and the water pump above the water tank, so as to shorten the longitudinal length of the water tank, to facilitate cleaning of the water tank, and to reduce the lateral width of the machine body, to facilitate user holding. However, such arrangement will result in a smaller volume of the water tank. To increase the volume of the water tank as much as possible, the present inventors have tried to shorten the longitudinal length of the water pump. Specifically, the input end and the output end of the water pump can be arranged at the lower side of the water pump instead of above the water pump, so as to increase the longitudinal depth of the sunken water tank, and to shorten the distance between the input end of the water pump and the bottom of the water tank, to improve the pumping effect of the water pump. In addition, the reversing water path can be arranged at the side of the water pump, so as to communicate the output end of the water pump arranged at the lower side with the flow channel of the output shaft of the motor arranged above. In this way, the positions of the water tank, the water pump and the motor are reasonably arranged while the appearance of the slender machine body is ensured, the volume of the sunken water tank is increased, and the pumping effect of the water pump is improved.

[0044] To make the objectives, technical solutions and superiorities of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0045] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0046] Fig. 2 is a schematic view of an oral cleaning device according to an embodiment of the present application, and Fig. 3 is a longitudinal sectional view of the oral cleaning device shown in Fig. 2. Referring to Figs. 2 and 3, the oral cleaning device according to an embodiment of the present application can include an oral cleaning device 1000 and a cleaning accessory 2000, wherein the cleaning accessory 2000 can be a toothbrush head, a rinsing head, a brushing and rinsing integrated head, or the like. Fig. 3 shows the cleaning accessory 2000 as a brushing and rinsing integrated head. The cleaning accessory 2000 can include a brush body 2100, and the brush body 2100 can have a cavity 2200 and a flow outlet 2300 communicating with the cavity 2200.

[0047] With continued reference to FIG. 3, the oral cleaning device 1000 can include a housing 100 and a power device. The power device can include a power assembly and a connector 400. To facilitate user gripping, the housing 100 can be shaped like an elongated cylinder. The housing 100 can have a circular or non-circular cross-sectional shape (e.g., D-shaped, oval, polygonal, etc.). A first axis X can be a centerline of the housing 100, i.e., the center point of each cross-section of the housing 100 can be on the first axis X. The housing 100 can extend along the first axis X (e.g., the up-down direction in FIG. 3), and the housing 100 can have a top end 160 and a bottom end 170 disposed opposite each other along the first axis X. The housing 100 can be hollow inside so that the housing 100 can have an internal cavity.

[0048] The power assembly can be disposed in the internal cavity of the housing 100, and the power assembly can 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 can be disposed in sequence along the first axis X. The motor 200 can be closer to the top end 160 of the housing 100 than the pump mechanism 300 (e.g., the motor 200 is above the pump mechanism 300 in FIG. 3) so that an output shaft 210 of the motor 200 can protrude out of the top end 160 of the housing 100 and be connected to a cleaning accessory 2000 (e.g., a toothbrush head, a brushing and spitting integrated head, etc.) having bristles to drive the cleaning accessory 2000 to move. The motor 200 can be a rotating motor 200 capable of rotating the cleaning accessory 2000, or the motor 200 can be a vibrating motor 200 (e.g., a sonic motor 200, etc.) capable of oscillating the cleaning accessory 2000 at a high frequency. The motor 200 can include a motor body 220 and the output shaft 210. The output shaft 210 can have an axis that coincides with or is parallel and spaced apart from the first axis X of the housing 100. The output shaft 210 can extend through the motor body 220 along its axis. The top end 160 of the output shaft 210 can protrude out of the top end 160 of the motor body 220 and be connected to the cleaning accessory 2000 to drive the cleaning accessory 2000 to move.

[0049] The output shaft 210 can have a first flow passage 211 extending through the output shaft 210 along its axis. The internal cavity of the housing 100 can include a liquid storage cavity 120 for storing liquid. FIG. 4 is another partial view of a longitudinal section of the oral cleaning device shown in FIG. 2. Referring to FIGS. 3 and 4, the connector 400 can have a second flow passage 410 and a third flow passage 420. It is noted that the third flow passage 420 and the second flow passage 410 are not on the same longitudinal section, so the second flow passage 410 can be seen from the section shown in FIG. 3, and the third flow passage 420 can be seen from FIG. 4.

[0050] The third flow channel 420 can communicate the liquid storage cavity 120 with the liquid inlet end 310 of the pump mechanism 300, and the second flow channel 410 can communicate the liquid outlet end 320 of the pump mechanism 300 with the first flow channel 211. In this way, the second flow channel 410 and the third flow channel 420 are integrated on the connecting piece 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 flow channel 410 and the third flow channel 420 to resist the impact force of the water flow, thereby improving the connection stability between the liquid storage cavity 120 and the second flow channel 410, the second flow channel 410 and the pump mechanism 300, the pump mechanism 300 and the third flow channel 420, and the third flow channel 420 and the first flow channel 211 of the output shaft 210, to reduce the risk of liquid leakage at the connection.

[0051] When the cleaning accessory 2000 is a flushing head, a flushing and brushing integrated head, or the like, which has a cavity 2200 and a flow outlet 2300 in communication with the cavity 2200 and capable of spraying liquid from the flow outlet 2300, the first flow channel 211 of the output shaft 210 can communicate with the cavity 2200 and the flow outlet 2300 of the cleaning accessory 2000. The arrows in FIGS. 3 and 4 represent the flow direction of the liquid, and with reference to the arrow marks in FIGS. 3 and 4, when the oral cleaner implements the flushing function, the pump mechanism 300 can guide the liquid in the liquid storage cavity 120 to enter the pump cavity of the pump mechanism 300 through the third flow channel 420, the liquid inlet end 310 of the pump mechanism 300, then enter the first flow channel 211 through the liquid outlet end 320 of the pump mechanism 300, the second flow channel 410, and then flow out from the flow outlet 2300 of the cleaning accessory 2000 through the cavity 2200.

[0052] Referring to FIG. 3, the power assembly (the motor 200 and the pump mechanism 300) and the liquid storage cavity 120 can be arranged in sequence along the first axis X direction (for example, the power assembly is located above the liquid storage cavity 120 in FIG. 1), so as to shorten the longitudinal length of the liquid storage cavity 120, facilitating the user to clean the water tank, and also to reduce the transverse width of the housing 100, facilitating the user to hold. Among them, the pump mechanism 300 can be closer to the liquid storage cavity 120 than the motor 200, so as to facilitate the pump mechanism 300 to suck liquid from the liquid storage cavity 120.

[0053] To increase the longitudinal height of the liquid storage cavity 120 so as to increase the volume of the liquid storage cavity 120, with reference to FIG. 3 and FIG. 4, the liquid outlet end 320 of the pump mechanism 300 can output liquid along the second axis Y, and the liquid inlet end 310 and the liquid outlet end 320 of the pump mechanism 300 can be arranged on one side of the pump mechanism 300 along the second axis Y, wherein the second axis Y intersects the first axis X. In this way, the length of the pump mechanism 300 in the first axis X direction is shortened, and the length of the liquid storage cavity 120 in the first axis X direction is increased, thereby increasing the volume of the liquid storage cavity 120. Further, the second axis Y direction is perpendicular to the first axis X direction. As shown in FIG. 3 and FIG. 4, the first axis X direction is the up-down direction, and the second axis Y direction is the left-right direction. The liquid inlet end 310 and the liquid outlet end 320 of the pump mechanism 300 are arranged on the left side of the pump mechanism 300.

[0054] To effectively utilize the side space of the pump mechanism 300, further, the connecting member 400 can be connected to one side (e.g., the left side in FIG. 3 and FIG. 4) of the pump mechanism 300 along the second axis Y direction, so that the third flow channel 420 and at least part of the second flow channel 410 are located on one side (e.g., the left side in FIG. 3 and FIG. 4) of the pump mechanism 300 along the second axis Y direction. The connection between the connecting member 400 and the liquid storage cavity 120 can be located on one side (e.g., the left side in FIG. 4) of the pump mechanism 300 along the second axis Y direction, so as to shorten the distance between the liquid inlet end 310 of the pump mechanism 300 and the liquid storage cavity 120, thereby facilitating the pump mechanism 300 to suck liquid in the liquid storage cavity 120.

[0055] Further, in the first axis X direction, the liquid inlet end 310 and the liquid outlet end 320 of the pump mechanism 300 can 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 arranged at the end of the pump mechanism 300 along the first axis X direction that is closer to the liquid storage cavity 120. 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, thereby facilitating the pump mechanism 300 to suck liquid in the liquid storage cavity 120; and the distance between the liquid outlet end 320 of the pump mechanism 300 and the first flow channel 211 is increased, thereby reducing the impact force of the liquid at the liquid outlet end 320 of the pump mechanism 300 on the output shaft 210 of the motor 200, thereby facilitating connection stability.

[0056] The oral cleaning device 1000 provided by the embodiments of the present application can further include an energy source 710, which can be a rechargeable battery, a storage battery or the like, and can provide electric energy for the motor 200, the pump mechanism 300 and the electrical devices on the circuit board 720. In order to enable the oral cleaning device 1000 to maintain an elongated shape, the energy source 710 can be located on the side of the pump mechanism 300 away from the motor 200 along the first axis X (for example, the lower side in FIGS. 3 and 4), and at least part of the energy source 710 is arranged side by side with at least part of the liquid storage cavity 120. That is, the energy source 710 and the liquid storage cavity 120 jointly occupy the bottom end 170 of the casing 100.

[0057] FIG. 5 is a diagram of an internal layout of the oral cleaning device provided by the embodiments of the present application. Referring to FIGS. 3-5, for example, the liquid storage cavity 120 can wrap around one side of the energy source 710 in the first axial direction. For example, in FIG. 5, the liquid storage cavity 120 can wrap around the outer side and the bottom of the energy source 710. That is, in the first axial direction, the energy source 710 has oppositely arranged top and bottom surfaces, and the casing 100 can have oppositely arranged inner top and bottom surfaces; there is a gap between the bottom surface of the energy source 710 and the inner bottom surface of the casing 100, and at least part of the liquid storage cavity is located between the bottom surface of the energy source 710 and the inner bottom surface of the casing 100. In other words, the liquid storage cavity 120 can be shaped like a "concave" shape, and the energy source 710 can be located in the concave of the concave-shaped liquid storage cavity 120. For another example, the liquid storage cavity 120 can only wrap around the outer side of the energy source 710, that is, the bottom surface of the energy source 710 abuts against the inner bottom surface of the casing 100.

[0058] FIG. 6 is another diagram of an internal layout of the oral cleaning device 1000 provided by the embodiments of the present application. Referring to FIG. 6, for another example, a space for placing the energy source 710 is formed between the liquid storage cavity 120 and the inner casing wall of the casing 100. For example, in FIG. 6, the liquid storage cavity 120 can wrap around the bottom of the energy source 710 and at least part of the outer side 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 casing 100, and at least part of the liquid storage cavity is located between the bottom surface of the energy source 710 and the inner bottom surface of the casing 100. In other words, the liquid storage cavity 120 can be shaped like an L shape, and the energy source 710 can be located at the notch of the L-shaped liquid storage cavity 120. For another example, the liquid storage cavity 120 can only wrap around the outer side of the energy source 710, that is, the bottom surface of the energy source 710 abuts against the inner bottom surface of the casing 100.

[0059] The liquid storage cavity 120 can be formed by a housing 130 which is independent of the casing 100, and the liquid storage cavity 120 can be detachably connected to the casing 100 so that the user can detach the liquid storage cavity 120 from the casing 100 for cleaning. Alternatively, the liquid storage cavity 120 can be formed by the inner wall of the casing 100 and the partition 600. Specifically, referring to FIGS. 5 and 6, the oral cleaning device 1000 according to the embodiments of the present application can further include a partition 600 which can be arranged in the inner cavity of the casing 100 and can divide the inner cavity of the casing 100 into the power cavity 110 and the liquid storage cavity 120. The motor 200, the pump mechanism 300 and the energy source 710 can be arranged in the power cavity 110.

[0060] Optionally, the planar projection of the power cavity 120 along the first axis X at least partially does not overlap with the planar projection of the liquid storage cavity 110 along the first axis X; or, the planar projection of the liquid storage cavity 110 along the first axis X at least partially does not overlap with the planar projection of the power cavity 120 along the first axis X.

[0061] Optionally, the planar projection of the power cavity 120 along the first axis X at least partially overlaps with the planar projection of the liquid storage cavity 110 along the first axis X.

[0062] As shown in FIGS. 5 and 6, the partition 600 and the inner wall of the casing 100 on one side of the partition 600 along the first axis X (e.g., the left side in FIGS. 5 and 6) can enclose the power cavity 110, and the partition 600 and the inner wall of the casing 100 on the other side of the partition 600 along the first axis X (e.g., the right side in FIGS. 5 and 6) can enclose the liquid storage cavity 120.

[0063] For example, referring to FIGS. 4 and 7, the partition 600 and the casing 100 can be detachably connected so that the user can detach the partition 600 from the casing 100 for cleaning. In view of the sealing, the partition 600 and the casing 100 can be filled with a first sealing member 810. For example, the outer wall of the partition 600 can be provided with a first sealing groove, the first sealing groove and the inner wall of the casing 100 can form a first sealing cavity, and the first sealing member 810 can be a first sealing ring which can be sealed in the first sealing cavity to prevent liquid from leaking out. In addition, the partition 600 and the casing 100 can be detachably connected by snap connection, and / or the partition 600 and the connecting member 400 (or the mounting member 500 to be mentioned below) can be fastened by fasteners such as bolts. Further, the fastener connection can be waterproofed. For example, referring to FIG. 12, the partition 600 can have a blind hole, the connecting member 400 or the mounting member 500 can be provided with a threaded hole, and the first fastener 921 can be arranged in the blind hole of the partition 600 and be screwed with the threaded hole of the connecting member 400 or the mounting member 500.

[0064] Another example, the partition 600 and the housing 100 can be formed as an integral piece by using an integral molding process, so as to facilitate assembly and improve connection strength.

[0065] FIG. 7 is a sectional view of the partition 600 shown in FIG. 4. Referring to FIG. 4 and FIG. 7, in order to make the liquid inlet end 310 of the pump mechanism 300 disposed in the power cavity 110 communicate with the liquid storage cavity 120, the partition 600 can have a communication hole 680 that communicates the power cavity 110 and the liquid storage cavity 120, and the third flow channel 420 of the connecting piece 400 can pass through the communication hole 680 to communicate with the liquid storage cavity 120. In order to shorten the distance between the liquid inlet end 310 of the pump mechanism 300 and the liquid storage cavity 120, optionally, the communication hole 680 can be disposed on one side of the pump mechanism 300 along the second axis Y direction (e.g., the left side in FIG. 4).

[0066] In order to avoid liquid leakage, optionally, the connecting piece 400 and the communication hole 680 can be sealingly connected by a second sealing member 820. Specifically, the outer side wall of the connecting piece 400 can have a second sealing groove, and a second sealing cavity can be formed between the second sealing groove and the inner hole wall of the communication hole 680. The second sealing member 820 can be a second sealing ring, which can be sealingly disposed in the second sealing cavity.

[0067] The partition 600 can be formed with a receiving port 620 and a receiving cavity 610 for receiving the energy source 710, and the receiving port 620 can be disposed on one side of the receiving cavity 610 along the first axis X direction towards the pump mechanism 300 (e.g., the upper side in FIG. 4 and FIG. 7). Wherein, the partition 600 can be formed separately with the receiving port 620 and the receiving cavity 610 as shown in FIG. 3-5 and FIG. 7. Alternatively, the partition 600 can form the receiving port 620 and the receiving cavity 610 with the inner shell wall of the housing 100 as shown in FIG. 6.

[0068] In one possible structure of the partition 600, referring to FIG. 3-5 and FIG. 7, when the liquid storage cavity 120 wraps around one side of the energy source 710 along the first axis X direction, the partition 600 can include a first portion 630 and a second portion 640 that communicate in sequence along the first axis X direction, and the first portion 630 can be closer to the pump mechanism 300 than the second portion 640. Wherein, the inner side wall of the first portion 630 can form part of the receiving port 620 and the receiving cavity 610, and the inner side wall of the second portion 640 can form another part of the receiving cavity 610. The shape of the outer side wall of the first portion 630 can be adapted to the shape of the inner shell wall of the housing 100, and the outer side wall of the first portion 630 can abut the inner shell wall of the housing 100, and the first portion 630 can be formed with the communication hole 680. The outer side wall of the second portion 640 and the inner shell wall of the housing 100 can define at least part of the liquid storage cavity 120.

[0069] For example, the fourth flow channel 651 can be formed in the liquid storage cavity 120 and can be in communication with the bottom of the liquid storage cavity 120 and the communication hole 680. The fourth flow channel 651 can be formed by a separate pipe. Alternatively, the fourth flow channel 651 can be formed by the partition 600 to facilitate assembly and to improve the connection strength between the fourth flow channel 651 and the communication hole 680. Specifically, referring to FIG. 4, the partition 600 can further include a third portion 650 that is integrally connected to the first portion 630. The third portion 650 can have a fourth flow channel 651 for liquid flow, and the fourth flow channel 651 can be in communication with the communication hole 680 and the side of the liquid storage cavity 120 that is away from the pump mechanism 300. Further, the fourth flow channel 651 can extend along the first axis X to reduce the water path length between the liquid inlet end 310 of the pump mechanism 300 and the side of the liquid storage cavity 120 that is away from the pump mechanism 300.

[0070] In another possible structure of the partition 600, referring to FIG. 6, when a space for placing the energy source 710 is formed between the liquid storage cavity 120 and the inner shell wall of the casing 100, the partition 600 can include a fourth portion 660 that extends along the first axis X. At least part of the liquid storage cavity 120 can be formed between the fourth portion 660 and a portion of the inner shell wall of the casing 100, and at least part of the accommodation cavity 610 can be formed between the fourth portion 660 and another portion of the inner shell wall of the casing 100.

[0071] Further, the partition 600 can further include a fifth portion 670 that is connected between the fourth portion 660 and the inner shell wall of the casing 100, and the fifth portion 670 can provide support for the energy source 710 in the first axis X direction.

[0072] Referring to FIG. 1, the water tank of the related oral cleaning device often has a vent hole. The vent hole can allow air to enter the water tank when the pump mechanism 300 is pumping water, and can fill the space left by the liquid to ensure that the inner cavity of the water tank is in communication with the outside. The related vent hole is exposed, which affects the appearance of the oral cleaning device 1000. In addition, when holding the body, there is a risk of blocking the vent hole and affecting the operation of the water pump. In addition, if the vent hole is designed inside the body, an additional vent pipe needs to be added in the inner cavity space, which increases the design difficulty.

[0073] To solve the above technical problems, the present inventors have conceived to divide the machine body into two parts that can be nested with each other, and to realize the communication between the inner cavity of the water tank and the outside through the assembly gap between the two parts, so that the appearance of the device can be made without holes. However, it is difficult to control the assembly gap to be relatively accurate, and the products on the same production line have different assembly gaps, some of which are large and have the risk of liquid leakage, and some of which are small and make it difficult for the outside gas to pass through. Based on this, the present inventors have conceived to form a microchannel between the mating surfaces of the two parts, and the cross section of the microchannel can be set to be small, so as to allow gas flow and block liquid flow. The assembly gap can be slightly larger to facilitate the passage of outside gas and the assembly gap of products on the same production line.

[0074] Specifically, referring to FIG. 3, the machine shell 100 can include a shell 130 and a cover 140. The shell 130 can include a top wall and a side wall, and the side wall of the shell 130 can be connected to the outer periphery of the top wall of the shell 130 and can extend along the first axis X direction. The top wall of the shell 130 can have a through hole 530 through which the output shaft 210 of the motor 200 passes. The shell 130 can have an opening which can be arranged at one end of the shell 130 along the first axis X direction as shown in FIG. 3 and can be arranged opposite to the top wall of the shell 130; or the opening can be arranged on the side wall of the shell 130.

[0075] The cover 140 can cover the opening of the shell 130, so that the shell 130 and the cover 140 can enclose the inner cavity of the outer shell. The cover 140 and the shell 130 can be nested with each other along a predetermined direction. The predetermined direction can be the first axis X direction, or can be intersected with the first axis X direction.

[0076] Specifically, the cover 140 can include a bottom wall and a side wall, and the side wall of the cover 140 can be connected to the outer periphery of the bottom wall of the cover 140 and extend in a certain direction, and the side wall and the bottom wall of the cover 140 can form a cover 140 inner cavity with an open end. The side wall of the cover 140 can be nested in the inner cavity of the shell 130 as shown in FIG. 3; or the side wall of the cover 140 can be sleeved on the outside of the shell 130. In addition, the cover 140 and the shell 130 can form at least part of the liquid storage cavity 120.

[0077] Referring to FIGS. 8 and 9, the cover 140 can have a first mating surface 145, and the housing 130 can have a second mating surface 131 disposed opposite the first mating surface 145, and a fitting gap 190 can be formed between the first mating surface 145 and the second mating surface 131. For example, as shown in FIG. 3, the cover 140 can be embedded in the inner cavity of the housing 130, and the outer side surface of the cover 140 embedded in the housing 130 can be the first mating surface 145, and the outer side surface of the housing 130 sleeved on the outside of the cover 140 can be the second mating surface 131; for another example, the cover 140 can be sleeved on the outside of the housing 130, and the inner side surface of the cover 140 can be the first mating surface 145, and the outer side surface of the housing 130 can be the second mating surface 131. In this way, the flow channel of the gas can be hidden inside the device to avoid blocking the flow channel of the gas, and the device has the advantages of facilitating ventilation and having no holes in appearance.

[0078] In addition, a micro channel 180 can be formed between the housing 130 and the cover 140. The micro channel 180 can allow the gas to pass in the first axis X direction and block the liquid from flowing out, and the micro channel 180 communicates the liquid storage cavity 120 with the outside through the fitting gap 190 between the housing 130 and the cover 140. Optionally, in a preset direction, the liquid storage cavity 120 can be higher than the micro channel 180. In this way, the water level in the liquid storage cavity 120 can be higher than the micro channel 180.

[0079] Specifically, the liquid level in the liquid storage cavity 120 can be higher than the micro channel 180, so that a pressure difference is formed between the outside air pressure (one atmosphere) and the air pressure in the liquid storage cavity 120 (less than one atmosphere). Under the action of the pressure difference, the gas can flow and the liquid can be blocked from flowing out, so as to achieve the purposes of ventilation and leakage prevention. It should be noted that the above-mentioned "blocking the liquid from flowing out" can be understood in a broad sense, which means that when the oral cleaning device 1000 is in a stationary state or a normal holding state of the user, the micro channel 180 can block the liquid from flowing out. However, when the user shakes the device violently, the surface tension can be broken, the air pressure can be affected, and the liquid can flow out of the micro channel 180.

[0080] The formation of the micro channel 180 will be described below with reference to FIGS. 8 and 9. Specifically, the sidewall of one of the housing 130 and the cover 140 can be provided with a third sealing groove 141, and the third sealing groove 141 can have an opening facing the outside. The sidewall of the other one of the housing 130 and the cover 140 can form a third sealing cavity 142 together with the third sealing groove 141, and the third sealing cavity 142 can communicate the liquid storage cavity 120 with the outside through the fitting gap 190. The groove bottom of the third sealing groove 141 can be provided with an airflow groove 143, and the airflow groove 143 can have an opening facing the third sealing cavity 142.

[0081] For example, as shown in FIG. 8 and FIG. 9, the cover 140 is embedded in the inner cavity of the shell 130, and the sidewall of the cover 140 can be provided with a third sealing groove 141 having an opening facing outward. The sidewall of the shell 130 and the third sealing groove 141 can enclose a third sealing cavity 142. For another example, the cover 140 can be sleeved on the outer side of the shell 130, and the sidewall of the shell 130 can be provided with a third sealing groove 141 having an opening facing outward. The sidewall of the cover 140 and the third sealing groove 141 can enclose a third sealing cavity 142.

[0082] FIG. 10 is a sectional view of the casing 100 at the non-airflow groove 143 according to an embodiment of the present application. Referring to FIG. 10, the casing 100 can further include a third sealing member 830, which can be clamped between the inner sidewall of the other one of the shell 130 and the cover 140 and the groove bottom of the third sealing groove 141. The cross-sectional shape of the third sealing member 830 can be circular, polygonal, etc., and the present application does not limit the cross-sectional shape of the third sealing member 830.

[0083] Continuing to refer to FIG. 8 and FIG. 9, the surface of the third sealing member 830 close to the airflow groove 143 and the airflow groove 143 form a micro channel 180. In this way, the sealing cavity is sealed by the third sealing member 830 at the non-airflow groove 143. The micro channel 180 for gas flow and liquid blockage is formed at the airflow groove 143. The machining depth of the airflow groove 143 is generally more accurate, so that the size of the micro channel 180 formed can be accurately controlled. In this way, the casing 100 provided by the present application can not only achieve air ventilation and liquid blockage, but also has high yield. In addition, when the pump mechanism 300 sucks liquid, the third sealing member 830 will be deformed and flattened, so that the assembly gap will be larger, which is more conducive to air intake.

[0084] The liquid level difference h formed by the highest liquid level of the liquid storage cavity 120 and the height of the horizontal plane where the airflow groove 143 is located satisfies the following condition: 0 < p * g * h < 30% * Po; wherein p represents the air density; g represents the liquid density; and Po represents one atmospheric pressure. p represents the air density; g represents the liquid density; and Po represents one atmospheric pressure.

[0085] Specifically, the greater the difference between the liquid pressure in the liquid storage cavity 120 and the atmospheric pressure outside, the more gas flows from the outside to the liquid storage cavity 120, and the more liquid leakage is avoided. Conversely, the smaller the difference between the liquid pressure in the liquid storage cavity 120 and the atmospheric pressure outside, the less gas flows from the outside to the liquid storage cavity 120, and liquid leakage can occur. The present inventors have found that when the liquid level difference h satisfies the above condition, the micro channel 180 can pass gas and block liquid leakage.

[0086] To further block the liquid from leaking out, the liquid level difference h can satisfy 0<pg*h≤20%*Po; to further block the liquid from leaking out, the liquid level difference h can satisfy 0<pg*h≤10%*Po. For example, pg*h≤10%*Po, pg*h≤5%*Po, pg*h≤1%*Po.

[0087] Further, the depth of the gas flow groove 143 can be in the range of 0.1mm to 0.4mm, so as to facilitate the gas passing through while blocking the liquid passing through. For example, the depth of the gas flow groove 143 can be 0.1mm, 0.3mm, 0.4mm, etc. Further, the depth of the gas flow groove 143 can be in the range of 0.25mm to 0.34mm, so as to further facilitate the gas passing through while blocking the liquid passing through. For example, the depth of the gas flow groove 143 can be 0.25mm, 0.30mm, 0.34mm, etc.

[0088] In the preset direction, the third sealing groove 141 can have two groove side walls oppositely arranged, and the groove bottom wall of the third sealing groove 141 can be connected between the two groove side walls; or the third sealing groove 141 can have a first groove side wall which can be used to support one side of the third sealing member 830.

[0089] When the third sealing member 830 has two groove side walls, to facilitate the gas in the third sealing cavity 142 flowing in and out, for example, referring to FIG. 8, in the preset direction, the height of the third sealing member 830 can be less than the height of the groove bottom wall. In this way, the third sealing member 830 and one of the groove side walls can form a channel which communicates with the microchannel 180, and the third sealing member 830 and the other groove side wall can also form a channel which communicates with the microchannel 180. In this way, the gas entering the third sealing cavity 142 can flow out of the third sealing cavity 142 after circumventing the third sealing member 830 at least half a turn as shown by the arrow mark in FIG. 8. Further, the gas flow groove 143 can penetrate the groove bottom wall in the preset direction as shown in FIG. 11.

[0090] For another example, referring to FIG. 9, both the inner side walls can be provided with the gas flow groove 144, the gas flow groove 144 can have an opening facing the third sealing cavity 142, and the gas flow groove 144 and the third sealing member can form a channel for the gas to flow through, and the channel communicates with the microchannel 180. The gas entering the third sealing cavity 142 can flow out of the third sealing cavity 142 after circumventing the third sealing member 830 at least half a turn through the channel and the microchannel 180 as shown by the arrow mark in FIG. 9. Further, the gas flow groove 144 can penetrate the groove side wall in a direction perpendicular to the groove bottom wall.

[0091] Similarly, when the third sealing member 830 has one groove side wall, the gas in the third sealing cavity 142 can flow in and out by reducing the height of the third sealing member 830 or by providing the gas flow groove 144 on the groove side wall.

[0092] Optionally, referring to FIG. 11, the circumferential length of the air flow groove 143 is shorter than the circumferential length of the sealing groove. The air flow groove 143 can be one or more. When the air flow groove 143 is more than one, the multiple air flow grooves 143 can be arranged at intervals.

[0093] Optionally, the cover 140 is detachably connected to the shell 130, so that when the liquid storage cavity 120 needs to be drained, the cover 140 can be detached from the shell 130 to achieve the purpose of rapid drainage.

[0094] FIG. 12 is an exploded view of the oral cleaner provided by the embodiment of the present application. Referring to FIG. 12, the oral cleaner provided by the embodiment of the present application can further include a mounting member 500. In order to facilitate assembly, the mounting member 500 is fixed to the inner shell wall of the casing 100, and the motor 200 and the pump mechanism 300 can be mounted on the mounting member 500. In this way, during assembly, the motor 200 and the pump mechanism 300 can be assembled on the mounting member 500 first, and then the two are assembled into the casing 100 as a whole.

[0095] It should be noted that the motor 200 and the pump mechanism 300 will vibrate during operation, which makes the connection reliability of the pipeline connected between the liquid outlet end 320 of the pump mechanism 300 and the first flow channel 211 of the output shaft 210 poor, and is prone to falling off. In view of the above problem, the present inventors think that the pump mechanism 300 is disassembled into the power end 330, the liquid inlet end 310 and the liquid outlet end 320, and the liquid outlet end 320 is integrated on the connecting member 400 and the mounting member 500, so as to reduce the resonance condition and improve the connection reliability of the connecting member 400 and the liquid outlet end 320 of the pump mechanism 300.

[0096] Specifically, referring to FIGS. 13-16, the second valve portion 321 of the liquid outlet end 320 can be integrated into the mounting member 500, and the second end cover portion 322 of the liquid outlet end 320 can be integrated into the connecting member 400. The power end 330, at least part of the connecting member 400, and at least part of the mounting member 500 can be sequentially arranged along the liquid outlet direction (the second axis Y direction) of the liquid outlet end 320 and can be connected by the third fastener 923. In this way, the mounting member 500 is arranged between the connecting member 400 and the power end 330 of the pump mechanism 300, so that the vibration of the pump body is mostly transmitted to the mounting member 500. A damping member can be arranged between the mounting member 500 and the inner shell wall of the casing 100, and the mounting member 500 can eliminate the vibration through damping connection, so that the vibration transmitted from the power end 330 of the pump mechanism 300 to the connecting member 400 is small or even nonexistent. In this way, the influence of the vibration of the power end 330 of the pump mechanism 300 on the connecting member 400 is reduced, and the connection reliability of the second flow channel 410 of the connecting member 400 and the liquid outlet end 320 of the pump mechanism 300 is improved. In addition, the integration of the liquid outlet end 320 on the mounting member 500 and the connecting member 400 not only facilitates assembly, but also shortens the waterway and improves the connection reliability.

[0097] Optionally, the power end 330 can include a pump shell 331 and a piston 332, and one end of the pump shell 331 can have an opening. The mounting member 500 can cover the opening, and the mounting member 500 and the pump shell 331 can jointly define a pump cavity of the pump mechanism 300 for reciprocating movement of the piston 332 along the liquid outlet direction of the liquid outlet end 320. The mounting member 500 can have a liquid outlet hole penetrating the mounting member 500 and communicating with the pump cavity of the pump mechanism 300, and the second valve portion 321 of the liquid outlet end 320 is arranged at the liquid outlet hole, and the second valve portion 321 of the liquid outlet end 320 can allow liquid to be pumped out of the pump cavity through the liquid outlet hole and prevent liquid from flowing into the pump cavity through the liquid outlet hole.

[0098] Specifically, the reciprocating movement of the piston 332 in the pump cavity can cause the liquid in the pump cavity to be pumped out of the liquid outlet hole, and the valve of the liquid outlet end 320 is unidirectional to avoid the liquid flowing back into the pump cavity through the liquid outlet hole. In this scheme, the mounting member 500 forms the pump cavity and the liquid outlet hole to achieve the purpose of integrating the valve portion of the liquid outlet end 320.

[0099] Optionally, referring to FIG. 16, the power end 330 can further include a driving member 333 having a driving shaft rotating relative to the pump shell 331. The driving shaft can drive the eccentric wheel to rotate relative to the pump shell 331, and the eccentric wheel can abut against the piston 332 to reciprocate.

[0100] Referring to FIGS. 15-17, optionally, at least part of the connecting member 400 and the second end cover portion 322 of the liquid outlet end 320 can be an integral piece formed by an integral molding process. The second end cover portion 322 of the liquid outlet end 320 can cover the liquid outlet hole, and the second end cover portion 322 of the liquid outlet end 320 can be formed with a liquid outlet flow channel that communicates the liquid outlet hole and the second flow channel 410.

[0101] Specifically, the liquid outlet passage of the second end cover portion 322 of the liquid outlet end 320 can guide the flow direction of the liquid flowing out of the liquid outlet hole. In this scheme, the connecting member 400 and the second end cover portion 322 of the liquid outlet end 320 are an integral piece, so that the liquid outlet passage and the second flow channel 410 are integrated, which facilitates improving the connection reliability of the communication, facilitating improving the smoothness of the liquid flow, and facilitating improving the convenience of assembly.

[0102] Optionally, the mounting member 500 can have a liquid inlet hole that penetrates the mounting member 500 and can communicate with the pump cavity of the pump mechanism 300. The first valve portion 311 of the liquid inlet end 310 can be arranged at the liquid inlet hole, and the first valve portion 311 of the liquid inlet end 310 can allow the liquid to be pumped into the pump cavity through the liquid inlet hole and prevent the liquid from flowing out through the liquid inlet hole.

[0103] Specifically, the reciprocating movement of the piston 332 in the pump cavity can cause the liquid to be pumped into the pump cavity from the liquid inlet hole; the valve of the liquid inlet end 310 is a one-way conduction function to avoid the liquid flowing out through the liquid inlet hole. In this scheme, the pump cavity and the liquid inlet hole are formed by the mounting member 500, which achieves the purpose of integrating the first valve portion 311 of the liquid inlet end 310.

[0104] Optionally, at least part of the connecting member 400 and the first end cover portion 312 of the liquid inlet end 310 can be an integral piece formed by an integral molding process, and the first end cover portion 312 of the liquid inlet end 310 can cover the liquid inlet hole, and the first end cover portion 312 of the liquid inlet end 310 can be formed with a liquid inlet flow channel that communicates with the liquid inlet hole. The liquid inlet flow channel can communicate with the third flow channel 420 of the connecting member 400. 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 scheme, the connecting member 400 and the first end cover portion 312 of the liquid inlet end 310 are an integral piece, so that the liquid inlet passage and the third flow channel 420 are integrated, which facilitates improving the connection reliability of the communication, facilitating improving the smoothness of the liquid flow, and facilitating improving the convenience of assembly.

[0105] Referring to FIG. 13-16, optionally, the mounting member 500 can include a first mounting portion 510, which can have a first side and a second side oppositely arranged along the liquid outlet direction of the liquid outlet end 320. The motor 200 and the power end 330 of the pump mechanism 300 can be arranged along the axial direction of the output shaft 210 at the first side of the first mounting portion 510. The portion of the connecting member 400 integrated with the second end cover portion 322 of the liquid outlet end 320 can be arranged at the second side of the first mounting portion 510. The mounting member 500 can have a through hole 530 for the connecting member 400 to pass through and limit the axial direction of the connecting member 400. In this way, the connecting member 400 can be limited by the through hole 530 to provide upward support and limit for the connecting member 400 to avoid up and down vibration of the connecting member 400. Optionally, the circuit board 720 can be mounted on the side of the first mounting portion 510 away from the motor 200 by the third fastener 924. The fourth damping member 914 can be arranged between the circuit board 720 and the inner shell wall of the casing 100.

[0106] Referring to FIG. 12 and FIG. 13, optionally, the mounting member 500 can further include a second mounting portion 520, which can be coupled to the first side of the first mounting portion 510, and the second mounting portion 520 and the first mounting portion 510 can enclose a containing space for wrapping the outer side of the motor 200. In this way, the mounting member 500 wraps the outer side of the motor 200, so that most of the vibration of the motor 200 is transmitted to the mounting member 500, thereby reducing the vibration of the motor 200 transmitted to the connecting member 400, and thus reducing the influence of the vibration of the power end 330 of the motor 200 on the connecting member 400, and improving the connection reliability of the second flow channel 410 of the connecting member 400 and the first flow channel 211 of the motor 200. Optionally, referring to FIG. 13, the first mounting portion 510 and the second mounting portion 520 can be fastened by the second fastener 922.

[0107] Optionally, a damping member is arranged between the first mounting portion 510 and the outer side of the motor 200; and / or, a damping member is arranged between the second mounting portion 520 and the outer side of the motor 200. In this way, the vibration transmission between the motor 200 and the mounting member 500 can be reduced by the damping member. For example, in FIG. 13, the second damping member 912 is arranged between the front end of the motor 200 and the mounting member 500, and the third damping member 913 is arranged between the rear end of the motor 200 and the mounting member 500.

[0108] Referring to FIG. 17, the connecting member 400 can have a mounting groove 450 for the output shaft 210 of the motor 200 to pass through, and a fourth seal 840 can 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 channel 211 of the output shaft 210 and the second flow channel 410 of the connecting member 400 can be communicated at the mounting groove 450, and the seal can prevent liquid from leaking out of the communication.

[0109] With continued reference to FIG. 17, the motor 200 can include a motor body 220 and the output shaft 210. The output shaft 210 of the motor 200 can pass through the motor body 220, and both axial ends of the output shaft 210 can pass out of the motor body 220. The bottom surface of the motor body 220 and the inner groove wall of the mounting groove 450 can enclose a limiting space for limiting the fourth seal 840. The limiting space can limit the fourth seal 840 at both axial ends of the output shaft 210. In this way, the fourth seal 840 can be limited by the bottom surface of the motor body 220 of the motor 200 and the groove bottom wall of the mounting groove 450 to avoid moving with vibration.

[0110] Referring to FIG. 17, the second flow channel 410 can include a first flow section 411 and a second flow section 412 communicated in sequence. The first flow section 411 is communicated with the liquid outlet 320 and can extend along the first axis X direction, and the first flow section 411 and the first flow channel 211 have a spacing in the second axis direction. The second flow section 412 can communicate the first flow section 411 and the first flow channel 211, and the second flow section 412 can include a first arc section 4121, which can be circularly arcuate between the first flow section 411. The circular arc transition is used to reduce the resistance of the flow channel inner wall to the liquid, which is beneficial to the flow of the liquid.

[0111] Further, the first arc section 4121 can be higher than the pump mechanism 300, and the first arc section 4121 can have an arc center towards the pump mechanism 300, so that the liquid flows more gently towards the first flow channel 211, further reducing the resistance of the flow channel inner wall to the liquid.

[0112] Optionally, the second flow section 412 further includes a second arc section 4122 circularly arcuate between the first flow channel 211. The circular arc transition is used to reduce the resistance of the flow channel inner wall to the liquid, which is beneficial to the flow of the liquid.

[0113] Further, the second arc section 4122 has an arc center towards the motor 200, so that the second arc section 4122 and the first flow channel 211 are smoothly joined, which is beneficial to the flow of the liquid.

[0114] Referring to FIGS. 17 and 18, alternatively, the connecting member 400 can include a first connecting portion 430 and a second connecting portion 440 connected to each other. The first connecting portion 430 can have a first flow section 411 and a reversing cavity 431 communicating with the first flow section 411, the reversing cavity 431 can have a first inner arc surface 432, and the reversing cavity 431 can have an opening in the first axis X direction. At least part of the second connecting portion 440 can be built in the reversing cavity 431 from the opening of the reversing cavity 431 and can have a second inner arc surface 441. The first inner arc surface 432 and the second inner arc surface 441 can enclose the second flow section 412.

[0115] Specifically, the second connecting portion 440 can include a cover plate section 442, a protruding section 443, and a baffle section 444. The protruding section 443 and the baffle section 444 can be connected to both sides of the cover plate section 442 along the first axis X direction, respectively. The cover plate section 442 can cover the reversing cavity 431, and the baffle section 444 can be located in the reversing cavity 431 and can have the second inner arc surface 441. The cover plate section 442 can be provided with a through hole, the protruding section 443 can surround the outside of the through hole, and the inner cavity of the protruding section 443 and the through hole can communicate. The output shaft 210 can be arranged in the inner cavity of the protruding section 443 and the through hole, and a fourth sealing member 840 is arranged between the output shaft 210 and the inner cavity wall of the protruding section 443. In this way, the protruding section 443 and part of the cover plate section 442 can form the mounting groove 450 mentioned above.

[0116] Wherein, the terms of "upper", "lower", and the like are used to describe the relative positional relationship of various structures in the drawings, which is only for the convenience of clear description, and is not used to limit the scope of the application. The change or adjustment of the relative relationship is also considered as the scope of the application without substantial change of the technical content.

[0117] It should be noted that: in this application, unless otherwise specified and limited, the first feature is "on" or "under" the second feature. It can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0118] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0119] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0120] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A housing for oral cleaning, characterized in that The shell (130) and the cover (140) are nested along a preset direction, and the shell (130) and the cover (140) define a liquid storage cavity (120); A micro-channel (180) is formed between the shell (130) and the cover (140), and the micro-channel (180) allows gas to pass through along the preset direction and blocks liquid from flowing out, and the micro-channel (180) communicates the liquid storage cavity (120) with the outside through an assembly gap (190) between the shell (130) and the cover (140).

2. The housing for oral cleaning according to claim 1, characterized in that, A side wall of one of the shell (130) and the cover (140) is provided with a sealing groove (141) having an opening facing outward, and a side wall of the other of the shell (130) and the cover (140) and the sealing groove (141) enclose a sealing cavity (142) that communicates the liquid storage cavity (120) with the outside through the assembly gap (190), and a groove bottom wall of the sealing groove (141) is provided with an airflow groove (143) having an opening facing the sealing cavity (142). The shell (100) further comprises a sealing member (830) clamped between an inner side wall of the other of the shell (130) and the cover (140) and a groove bottom wall of the sealing groove (141), and a surface of the sealing member (830) close to the airflow groove (143) and the airflow groove (143) form the micro-channel (180).

3. The housing for oral cleaning according to claim 2, characterized in that A liquid level difference h formed by a highest liquid surface height of the liquid storage cavity (120) and a height of a horizontal plane where the airflow groove (143) is located satisfies the following condition: 0 < p * g * h <= 30% * Po; wherein p represents air density, g represents liquid density, and Po represents one atmospheric pressure.

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

5. The housing for oral cleaning according to claim 3, wherein The height difference h satisfies the following condition: 0 < p * g * h <= 10% * Po.

6. The housing for oral cleaning according to claim 5, characterized in that The depth of the airflow groove (143) ranges from 0.1 mm to 0.4 mm.

7. The housing for oral cleaning according to claim 6, characterized in that The depth of the airflow groove (143) ranges from 0.25 mm to 0.35 mm.

8. The housing for oral cleaning according to claim 5, wherein The sealing groove (141) has a groove bottom wall and two groove side walls connected to both sides of the groove bottom wall along the preset direction. In the preset direction, the height of the sealing member (830) is less than the height of the groove bottom wall.

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

10. The housing for oral cleaning according to claim 5, wherein The sealing groove (141) has a groove bottom wall and two groove side walls connected to both sides of the groove bottom wall along the preset direction. The two inner side walls are provided with flow guide grooves (144) having openings facing the sealing cavity (142), and channels for gas flow are formed between the flow guide grooves (144) and the sealing member (830), which channels communicate with the micro-channels (180); Gas entering the sealing cavity (142) flows through the channels and the micro-channels (180) around the sealing member (830) at least half a circle and then flows out of the sealing cavity (142). The flow guide grooves (144) extend through the groove side walls in a direction perpendicular to the groove bottom wall.

11. The housing for oral cleaning according to claim 10, characterized in that The circumferential length of the gas flow groove (143) is shorter than the circumferential length of the sealing groove (141).

12. A housing for oral cleaning according to any of claims 5-11, characterized in that The pump mechanism (300) is arranged in the inner cavity of the casing (100), the cleaning accessory (2000) has a cavity (2200) and a flow outlet (2300) in communication, the cavity (2200) of the cleaning accessory (2000) is in communication with the liquid outlet end (320) of the pump mechanism (300), and the pump mechanism (300) pumps the liquid in the liquid storage cavity (120) into the cavity (2200) of the cleaning accessory (2000) and out of the flow outlet (2300).

13. An oral cleaner characterized by, The cleaning accessory (2000) further comprises a plurality of bristles.

14. The oral cleaner of claim 13, wherein, ​

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