Casing for oral cavity cleaning and oral cavity cleaning device

Abstract

The utility model discloses a machine shell for oral cavity cleaning and an oral cavity cleaning device, the machine shell comprises a shell body and a cover body, the shell body is provided with an opening, and the cover body covers the opening of the shell body; the cover body and the shell are mutually nested in a preset direction, and a liquid storage cavity is defined by the cover body and the shell; a micro-channel is formed between the shell and the cover body; the micro-channel can allow gas to penetrate in the preset direction and prevent liquid from flowing out, and the micro-channel communicates the liquid storage cavity with the outside through an assembly gap between the shell and the cover. The casing for oral cavity cleaning and the oral cavity cleaning device have the effects of being free of holes in appearance, breathable and waterproof.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of oral cleaning appliances, and in particular to a housing and an oral cleaning device for oral cleaning. Background Art

[0002] As people pay more attention to oral care, electric toothbrushes and oral irrigators have gradually become common oral care tools in households. Electric toothbrushes use motors to make the brush head vibrate at high frequencies, so that toothpaste can be instantly broken down into fine foam and deeply clean the gaps between teeth. Oral irrigators use water pumps to pump out high-speed water columns with a certain pressure, so that the impact force of the high-speed water columns can be used to clean teeth and gaps between teeth.

[0003] The relevant oral cleaner can combine the toothbrush function with the toothwash function. Specifically, the relevant oral cleaner may include a body, a toothbrush, a motor, a water pump and a water tank, wherein the toothbrush 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 to flow through, and the flow channel is connected to the water tank. The toothbrush has a cavity and a flow outlet connected to the cavity, the output shaft of the motor is passed through the cavity, and the flow channel of the output shaft of the motor is connected to the flow outlet, so that the liquid in the water tank can be ejected from the flow outlet through the flow channel under the action of the water pump.

[0004] The water tank of the oral cleaner is provided with vent holes so that air can enter the water tank when the water pump is pumping water. However, these vent holes are sometimes designed on the surface of the body, and when the user holds the body, there is a risk of blocking the vent holes and affecting the operation of the water pump. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a housing and an oral cleaning device for oral cleaning, which can take into account the appearance design while utilizing the micro-structure of the sealing cover to achieve a hidden vent design, and solve the problem of the user blocking the exposed vent when holding the body, thereby affecting the operation of the water pump, without adding additional design costs for the internal ventilation pipeline.

[0006] To achieve the above-mentioned purpose, one aspect of an embodiment of the present application provides a shell for oral cleaning, including a shell and a cover body, the shell having an opening, and the cover body covering the opening of the shell; the cover body and the shell are nested with each other along a preset direction, and the cover body and the shell define a liquid storage cavity; a microchannel is formed between the shell and the cover body; and the microchannel can allow gas to pass through along the preset direction and block liquid from flowing out, and the microchannel utilizes the assembly gap between the shell and the cover body to connect the liquid storage cavity with the outside world.

[0007] The oral cleaning device provided in the embodiment of the present application is inserted into the shell through the opening of the shell through the cover body and seals the opening of the shell, and the cover body and the shell higher than the cover body form a liquid storage cavity. A microchannel is formed between the outer surface of the cover body and the inner shell wall of the shell, and the microchannel is connected to the outside world through the assembly gap between the cover body and the shell, so as to hide the flow channel of the gas inside the shell to avoid blocking the flow channel of the gas, which has the effect of facilitating ventilation. In addition, the aperture of the microchannel is small, and it can allow gas to flow and block liquid from flowing out under the action of the external atmospheric pressure and the negative pressure in the liquid storage cavity, so as to achieve the effects of ventilation and leakage prevention.

[0008] Optionally, a sealing groove is provided on the side wall of one of the shell and the cover body, and the sealing groove has an opening facing outward; the side wall of the other of the shell and the cover body and the sealing groove together form a sealed cavity, and the sealed cavity connects the liquid storage cavity with the outside through the assembly gap, and the bottom wall of the sealing groove is provided with an air flow groove, and the air flow groove has an opening facing the sealed cavity; the casing also includes a sealing member, which is clamped between the inner side wall of the other of the shell and the cover body and the bottom wall of the sealing groove, and the microchannel is formed between the surface of the sealing member close to the air flow groove and the air flow groove.

[0009] Optionally, in the preset 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 airflow groove is located satisfies the following conditions: 0<ρ*g*h≤30%*Po; wherein ρ represents air density; g represents liquid density; Po represents one atmospheric pressure.

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

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

[0012] Optionally, the depth of the air flow groove ranges from 0.1 mm to 0.4 mm.

[0013] Optionally, the depth of the air flow groove ranges from 0.25 mm to 0.35 mm.

[0014] Optionally, the sealing groove 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 preset direction; in the preset direction, the height of the sealing member is smaller than the height of the groove bottom wall.

[0015] Optionally, the air flow groove penetrates the groove bottom wall along the preset direction.

[0016] Optionally, the sealing groove 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 extension direction of the side wall of the cover body; the two inner side walls are provided with a guide groove, the guide groove has an opening facing the sealing cavity, and a channel for gas to flow through is formed between the guide groove and the sealing member, and the channel is connected to the microchannel; the gas entering the sealing cavity passes through the channel and the microchannel, flows around the sealing member for at least half a circle, and then flows out of the sealing cavity.

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

[0018] Optionally, the circumferential length of the airflow groove is shorter than the circumferential length of the sealing groove.

[0019] Another aspect of an embodiment of the present application provides an oral cleaning device, comprising a pump mechanism, a cleaning attachment, and a housing for oral cleaning as described above, wherein the pump mechanism is arranged in the inner cavity of the housing, the cleaning attachment has a connected cavity and an outflow port, the cavity of the cleaning attachment is connected to the liquid outlet end of the pump mechanism, and the pump mechanism pumps the liquid in the liquid storage cavity into the cavity of the cleaning attachment, and the liquid flows out from the outflow port. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a schematic diagram of a related oral cleaner;

[0022] Figure 2 A schematic diagram of an oral cleaning device provided in an embodiment of the present application;

[0023] Figure 3 for Figure 2 A longitudinal sectional view of the oral cleaning device is shown;

[0024] Figure 4 for Figure 2 Another partial longitudinal section view of the oral cleaning device is shown;

[0025] Figure 5 An internal layout diagram of an oral cleaning device provided in an embodiment of the present application;

[0026] Figure 6 Another internal layout diagram of the oral cleaning device provided in an embodiment of the present application;

[0027] Figure 7 for Figure 4 a cross-sectional view of the separator shown;

[0028] Figure 8 A partial cross-sectional view of a housing at an air flow slot provided in an embodiment of the present application;

[0029] Fig. 9 A partial cross-sectional view of another housing at the air flow slot provided in an embodiment of the present application;

[0030] Fig.10 A partial cross-sectional view of a housing provided in an embodiment of the present application at a location other than an air flow slot;

[0031] Fig.11 A schematic diagram of a cover body and a third sealing ring provided in an embodiment of the present application;

[0032] Fig.12 An exploded view of an oral cleaning device provided in an embodiment of the present application;

[0033] Fig.13 for Fig.12 An exploded view of the motor, connectors, mounting parts and circuit board shown;

[0034] Fig.14 for Fig.13 The assembly perspective view of the mounting member, the connecting member and the pump mechanism shown;

[0035] Fig.15 An exploded view of the connecting member, the mounting member, and the motor of the oral cleaning device provided in an embodiment of the present application;

[0036] Fig.16 for Fig.15 An exploded view of the pump mechanism, mountings, and connections shown;

[0037] Fig.17 for Figure 3 A partial schematic diagram of

[0038] Fig.18 An exploded view of a connector provided in an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 1000. Oral cleaning device;

[0041] 100, housing; 110, power cavity; 120, liquid storage cavity; 130, housing; 131, second mating surface; 140, cover; 141, third sealing groove; 142, third sealing cavity; 143, air flow groove; 144, guide groove; 145, first mating surface; 160, top end; 170, bottom end; 180, microchannel; 190, assembly gap;

[0042] 200, motor; 210, output shaft; 211, first flow channel; 220, motor body;

[0043] 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;

[0044] 400, connecting piece; 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 portion; 431, reversing cavity; 432, first inner arc surface; 440, second connecting portion; 441, second inner arc surface; 442, cover plate section; 443, raised section; 444, baffle section; 450, mounting groove;

[0045] 500, mounting member; 510, first mounting portion; 520, second mounting portion; 530, through hole;

[0046] 600, separator; 610, accommodating cavity; 620, accommodating port; 630, first portion; 640, second portion; 650, third portion; 651, fourth flow channel; 660, fourth portion; 670, fifth portion; 680, communicating hole;

[0047] 710. Energy source; 720. Circuit board;

[0048] 810, first sealing member; 820, second sealing member; 830, third sealing member; 840, fourth sealing member;

[0049] 911, a first vibration damping member; 912, a second vibration damping member; 913, a third vibration damping member; 914, a fourth vibration damping member;

[0050] 921, first fastener; 922, second fastener; 923, third fastener;

[0051] 2000, cleaning attachment; 2100, brush body; 2200, cavity; 2300, outflow port. DETAILED DESCRIPTION

[0052] Figure 1A schematic diagram of a related oral cleaner is shown in FIG. Figure 1 The body of the related oral cleaner is slender, wherein the water tank is arranged on the right side of the body, and the motor, water pump and battery are arranged on the left side of the body. The longitudinal length of the water tank is almost equal to the longitudinal length of the body, and the diameter of the water tank is small, which makes it difficult for the user to clean the inner wall of the water tank. In addition, the water pump is arranged in the left middle position of the body, and the input end a and the output end b of the water pump are arranged on the upper part of the water pump, resulting in a too long longitudinal distance between the input end a of the water pump and the bottom of the water tank, which in turn results in a long water path between the two, which is not conducive to the water pump sucking the liquid in the water tank.

[0053] In view of the above technical problems, the inventor of the present application has thought of setting the water tank at the lower part of the fuselage, and setting the motor, water pump, etc. above the water tank to shorten the longitudinal length of the water tank for easy cleaning of the water tank; and can also reduce the lateral width of the fuselage for easy gripping by users. However, such a setting will reduce the volume of the water tank. In order to increase the volume of the water tank as much as possible, the inventor of the present application tried to shorten the longitudinal length of the water pump. Specifically, the input end and the output end of the water pump can be converted from being set above the water pump to being set at the lower side of the water pump, which not only increases the longitudinal depth of the sunken water tank, but also shortens the distance between the input end of the water pump and the bottom of the water tank, thereby improving the suction effect of the water pump. In addition, the space on the side of the water pump can be used to set a reversing waterway so that the output end of the water pump set at the lower side is connected to the flow channel of the output shaft of the motor set at the top. In this way, while ensuring the appearance of the slender fuselage, the positions of the water tank, water pump, and motor are reasonably arranged, which not only increases the volume of the sunken water tank, but also improves the suction effect of the water pump.

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0055] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0056] Figure 2 This is a schematic diagram of an oral cleaning device provided in an embodiment of the present application. Figure 3 for Figure 2 A longitudinal sectional view of an oral cleaning device is shown. Figure 2 and Figure 3The oral cleaning device provided in the embodiment of the present application may include an oral cleaning device 1000 and a cleaning attachment 2000, wherein the cleaning attachment 2000 may be a device capable of cleaning the oral cavity, such as a toothbrush head, a rinse head, and an integrated rinse head. Figure 3 The cleaning attachment 2000 is taken as an example of a flushing integrated head, wherein the cleaning attachment 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 .

[0057] Continue to refer Figure 3 , the oral cleaning device 1000 may include a housing 100, a power assembly and a connector 400. In order to facilitate the user to hold, the housing 100 may be shaped like an elongated cylinder. The cross-section of the housing 100 may be circular or non-circular (such as D-shaped, elliptical, polygonal, etc.). The first axis is the center line of the housing 100, that is, the center point of each cross section of the housing 100 may be on the first axis. The housing 100 may be shaped along the first axis (such as Figure 3 The housing 100 may extend in the up-down direction of the first axis, and the housing 100 may have a top end 160 and a bottom end 170 that are oppositely disposed along the first axis direction. The interior of the housing 100 may be hollow, so that the housing 100 may have an inner cavity.

[0058] The power assembly may be disposed in the inner cavity of the housing 100, and the power assembly may include a motor 200 and a pump mechanism 300. In order to maintain the elongated shape requirement of the housing 100, the motor 200 and the pump mechanism 300 may be disposed sequentially along the first axis direction. The motor 200 may be closer to the top 160 of the housing 100 (e.g., Figure 3 The motor 200 is located above the pump mechanism 300), so that the output shaft 210 of the motor 200 passes through the top 160 of the housing 100 and is connected to the cleaning attachment 2000 (such as a toothbrush head, an integrated flushing head, and other accessories with bristles) to drive the cleaning attachment 2000 to move. The motor 200 can be a rotating motor 200 that can rotate the cleaning attachment 2000; or, the motor 200 can be a vibration motor 200 (such as a sonic motor 200, etc.) that can make the cleaning attachment 2000 swing at a high frequency. The motor 200 may include a motor body 220 and an output shaft 210. The axis of the output shaft 210 may coincide with the first axis of the housing 100 or be arranged at intervals. The output shaft 210 may be arranged in the motor body 220 along its axial direction. The axial top 160 of the output shaft 210 may pass through the top 160 of the motor body 220 and may be connected to the cleaning attachment 2000 to drive the cleaning attachment 2000 to move.

[0059] The output shaft 210 may have a first flow channel 211 that penetrates the output shaft 210 along its axial direction. The inner cavity of the housing 100 may include a liquid storage cavity 120, and the liquid storage cavity 120 may be used to store liquid. Figure 4 for Figure 2 Another longitudinal section of the oral cleaning device is shown. Figure 3 and Figure 4 , the connector 400 may have a second flow channel 410 and a third flow channel 420. It should be noted that the third flow channel 420 and the second flow channel 410 are not on the same longitudinal section. Figure 3 The cross section shown shows the second flow channel 410, from Figure 4 The third flow channel 420 can be seen.

[0060] The third flow channel 420 can connect the liquid storage cavity 120 with the liquid inlet end 310 of the pump mechanism 300, and the second flow channel 410 can connect the liquid outlet end 320 of the pump mechanism 300 with the first flow channel 211. When the cleaning accessory 2000 is a flushing head, a flushing integrated head, or the like, which has a cavity 2200 and an outlet 2300 connected to the cavity 2200 and can spray liquid from the outlet 2300, the first flow channel 211 of the output shaft 210 can be connected to the outlet 2300 through the cavity 2200 of the cleaning accessory 2000. Figure 3 and Figure 4 The arrows in the figure indicate the direction of liquid flow. Figure 3 and Figure 4 As indicated by the arrows in the figure, when the oral cleaning device realizes 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 and the liquid inlet end 310 of the pump mechanism 300, and then enter the first flow channel 211 through the liquid outlet end 320 of the pump mechanism 300 and the second flow channel 410, and then flow out from the outflow port 2300 through the cavity 2200 of the cleaning attachment 2000.

[0061] refer to Figure 3 The power assembly (motor 200 and pump mechanism 300) and the liquid storage chamber 120 can be arranged in sequence along the first axis (eg Figure 1 The power assembly is located above the liquid storage cavity 120 to shorten the longitudinal length of the liquid storage cavity 120, which is convenient for users to clean the water tank; the lateral width of the housing 100 can also be reduced to facilitate users to hold it. The pump mechanism 300 can be closer to the liquid storage cavity 120 than the motor 200, so that the pump mechanism 300 can pump liquid from the liquid storage cavity 120.

[0062] In order to increase the longitudinal height of the liquid storage cavity 120 so as to increase the volume of the liquid storage cavity 120, refer to Figure 3 and Figure 4Optionally, 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 direction, wherein the second axis direction intersects with the first axis direction. In this way, the length of the pump mechanism 300 in the first axis direction is shortened, the length of the liquid storage cavity 120 in the first axis direction is increased, and the volume of the liquid storage cavity 120 is increased. Furthermore, the second axis direction is perpendicular to the first axis direction. Figure 3 and Figure 4 In the figure, the first axis direction is the up-down direction, the second axis direction is the left-right direction, and the liquid inlet end 310 and the liquid outlet end 320 of the pump mechanism 300 are both arranged on the left side of the pump mechanism 300 .

[0063] In order to effectively utilize the side space of the pump mechanism 300, further, the connecting member 400 can be connected to one side of the pump mechanism 300 along the second axis direction (such as Figure 3 and Figure 4 ), so that the third flow channel 420 and at least part of the second flow channel 410 are located on one side of the pump mechanism 300 along the second axis direction (such as Figure 3 and Figure 4 The connection between the connector 400 and the liquid storage chamber 120 may be located on one side of the pump mechanism 300 along the second axis direction (eg, Figure 4 The left side in the figure) is used to shorten the distance between the liquid inlet end 310 of the pump mechanism 300 and the liquid storage cavity 120, so that the pump mechanism 300 can suck the liquid in the liquid storage cavity 120.

[0064] Further, in the direction of the first axis, 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 to say, the liquid inlet end 310 and the liquid outlet end 320 of the pump mechanism 300 are arranged at one end of the pump mechanism 300 closer to the liquid storage cavity along the first axis. 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, so that the pump mechanism 300 can suck the 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 to reduce 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, so as to facilitate the connection stability.

[0065] The oral cleaning device 1000 provided in the embodiment of the present application may further include an energy source 710, which may be a rechargeable battery, a storage battery, or the like, which can provide electrical energy to the motor 200, the pump mechanism 300, and the electrical components on the circuit board 720. In order to keep the oral cleaning device 1000 slender, the energy source 710 may be located on one side of the pump mechanism 300 away from the motor 200 along the first axis (e.g., Figure 3 and Figure 4The energy source 710 and the liquid storage cavity 120 are arranged side by side. In other words, the energy source 710 and the liquid storage cavity 120 jointly occupy the bottom end 170 of the housing 100.

[0066] Figure 5 This is an internal layout diagram of the oral cleaning device 1000 provided in an embodiment of the present application. Figure 3-Figure 5 For example, the liquid storage cavity 120 may be wrapped around one side of the energy source 710 in the first axial direction. Figure 5 In the embodiment of the present invention, the liquid storage cavity 120 can wrap the outer side surface and the bottom surface of the energy source 710. That is to say, in the first axial direction, the energy source 710 has a top surface and a bottom surface that are arranged opposite to each other, and the housing 100 can have an inner top surface and an inner bottom surface that are arranged opposite to each other; 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 part of the liquid storage cavity is located between the bottom surface of the energy source 710 and the inner bottom surface of the housing 100. In other words, the liquid storage cavity 120 can be shaped like a "concave" shape, and the energy source 710 can be located in the depression of the concave liquid storage cavity 120. For another example, the liquid storage cavity 120 can only wrap the outer side surface of the energy source 710, that is, the bottom surface of the energy source 710 abuts against the inner bottom surface of the housing 100.

[0067] Figure 6 Another internal layout diagram of the oral cleaning device 1000 provided in the embodiment of the present application. Figure 6 In another exemplary embodiment, a space for placing the energy source 710 is formed between the liquid storage cavity 120 and the inner shell wall of the housing 100. For example, Figure 6 In the embodiment, the liquid storage cavity 120 may wrap the bottom surface of the energy source 710 and at least part of the outer side 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 part of the liquid storage cavity is located between the bottom surface of the energy source 710 and the inner bottom surface of the housing 100. In other words, the liquid storage cavity 120 may be L-shaped, and the energy source 710 may be located at the notch of the L-shaped liquid storage cavity 120. For another example, the liquid storage cavity 120 may only wrap the outer side surface of the energy source 710, that is, the bottom surface of the energy source 710 abuts against the inner bottom surface of the housing 100.

[0068] The liquid storage cavity 120 may be formed by a housing 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 remove the liquid storage cavity 120 from the housing 100 for cleaning. Alternatively, the liquid storage cavity 120 may be formed by the inner shell wall of the housing 100 and the partition 600. For details, refer to Figure 5 and Figure 6The oral cleaning device 1000 provided in the embodiment of the present application may further include a partition 600, which may be disposed in the inner cavity of the housing 100 and may separate the inner cavity of the housing 100 into a power cavity 110 and a liquid storage cavity 120, wherein the motor 200, the pump mechanism 300 and the energy source 710 may all be disposed in the power cavity 110. Figure 5 and Figure 6 In the embodiment, the partition 600 and the partition 600 are located on one side along the first axis direction (such as Figure 5 and Figure 6 The inner shell wall of the casing 100 on the left side of the casing 100 can be enclosed to form a power cavity 110, and the partition 600 and the other side of the partition 600 along the first axis direction (such as Figure 5 and Figure 6 The inner shell wall of the casing 100 (on the right side) can be enclosed to form a liquid storage cavity 120.

[0069] Exemplary, reference Figure 4 and Figure 7 , the partition 600 is detachably connected to the casing 100 so that the user can remove the partition 600 from the casing 100 for cleaning. Taking the sealing into consideration, a first seal 810 may be filled between the partition 600 and the casing 100. For example, the outer wall of the partition 600 may be provided with a first sealing groove, and a first sealing cavity may be formed between the first sealing groove and the inner shell wall of the casing 100. The first seal 810 may be a first sealing ring, which may be sealed in the first sealing cavity to prevent liquid from leaking out. In addition, the partition 600 and the casing 100 may be detachably connected by a snap-fit ​​connection; and / or the partition 600 and the connecting member 400 (or the mounting member 500 mentioned below) are fastened together by fasteners such as bolts. Furthermore, the fastener connection may be waterproofed. For example, refer to Fig.12 The partition 600 may have a blind hole, the connector 400 or the mounting member 500 may have a threaded hole, and the first fastener 921 may pass through the blind hole of the partition 600 and be threadedly connected to the threaded hole provided in the connector 400 or the mounting member 500 .

[0070] In another exemplary embodiment, the partition 600 and the housing 100 may be an integral part formed by an integral molding process to facilitate assembly and improve connection strength.

[0071] Figure 7 for Figure 4 A cross-sectional view of a separator 600 is shown. Figure 4 and Figure 7In 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 may have a connecting hole 680 connecting the power cavity 110 and the liquid storage cavity 120, and the third flow channel 420 of the connecting member 400 may communicate with the liquid storage cavity 120 through the connecting 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, the connecting hole 680 may be optionally disposed on one side of the pump mechanism 300 along the second axis direction (such as Figure 4 on the left side of the image).

[0072] To prevent liquid from leaking out, the connecting member 400 and the communicating hole 680 may be sealed and connected via a second sealing member 820. Specifically, the outer wall of the connecting member 400 may have a second sealing groove, and a second sealing cavity may be formed between the second sealing groove and the inner wall of the communicating hole 680. The second sealing member 820 may be a second sealing ring, and the second sealing ring may be sealed in the second sealing cavity.

[0073] The partition 600 may be formed with a receiving opening 620 and a receiving cavity 610 for receiving the energy source 710. The receiving opening 620 may be disposed on one side of the receiving cavity 610 along the first axis direction toward the pump mechanism 300 (eg, Figure 4 and Figure 7 The separator 600 may be as follows: Figure 3-Figure 5 , Figure 7 As shown in FIG. 6A , the receiving opening 620 and the receiving cavity 610 can be formed separately. Alternatively, the partition 600 can be formed as shown in FIG. Figure 6 As shown, an accommodating opening 620 and an accommodating cavity 610 are formed with the inner shell wall of the shell 100 .

[0074] In one possible structure of the separator 600, reference Figure 3-Figure 5 , Figure 7 When the liquid storage cavity 120 is wrapped around one side of the energy source 710 along the first axis direction, the partition 600 may include a first portion 630 and a second portion 640 that are sequentially connected along the first axis direction, and the first portion 630 may be closer to the pump mechanism 300 than the second portion 640. The inner side wall of the first portion 630 may form a receiving port 620 and a portion of the receiving cavity 610, and the inner side wall of the second portion 640 may form another portion of the receiving cavity 610. The shape of the outer side wall of the first portion 630 may be compatible with the shape of the inner shell wall of the housing 100, and the outer side wall of the first portion 630 abuts against the inner shell wall of the housing 100, and the first portion 630 may be formed with a connecting hole 680. At least part of the liquid storage cavity 120 may be defined between the outer side wall of the second portion 640 and the inner shell wall of the housing 100.

[0075] For example, the liquid storage cavity 120 may be provided with a fourth flow channel 651 connecting the bottom of the liquid storage cavity 120 and the connecting hole 680. The fourth flow channel 651 may be formed by an independent tube. Alternatively, the fourth flow channel 651 may be formed by a partition 600 to facilitate assembly and improve the connection strength between the fourth flow channel 651 and the connecting hole 680. For details, refer to Figure 4 , the partition 600 may further include a third portion 650, which is integrally connected to the first portion 630. The third portion 650 may have a fourth flow channel 651 for liquid flow, and the fourth flow channel 651 may connect the connecting hole 680 with the side of the liquid storage cavity 120 away from the pump mechanism 300. Further, the fourth flow channel 651 may extend along the first axis direction, so as to reduce the length of the water path 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.

[0076] In another possible structure of the separator 600, refer to Figure 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 housing 100, the partition 600 may include a fourth portion 660, which may extend along the first axis. At least part 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 part of the accommodating cavity 610 may be formed between the fourth portion 660 and another portion of the inner shell wall of the housing 100.

[0077] Furthermore, the partition 600 may further include a fifth portion 670 , which may be connected between the fourth portion 660 and the inner shell wall of the housing 100 , and the fifth portion 670 may provide support for the energy source 710 in the direction of the first axis.

[0078] refer to Figure 1 , the water tank of the relevant oral cleaner is often provided with a vent. The vent allows air to enter the water tank when the pump mechanism 300 is pumping water, and fills the space where the liquid is lost, ensuring that the inner cavity of the water tank is connected to the outside. The relevant vent is exposed, which affects the appearance of the oral cleaning device 1000; in addition, when the body is held, there is a risk of blocking the vent and affecting the operation of the water pump; in addition, if the vent is designed inside the body, it is necessary to add an additional ventilation pipeline in the inner cavity space, which increases the design difficulty.

[0079] In response to the above technical problems, the inventors of the present application thought of disassembling the fuselage into two parts that can be nested with each other, and using the assembly gap between the two parts to connect the inner cavity of the water tank with the outside world. In this way, the appearance of the device can be made hole-free. However, the assembly gap is difficult to control more accurately. Some products on the same production line have a large assembly gap and there is a risk of leakage, while others have a small assembly gap, which makes it difficult for external gas to pass through. Based on this, the inventors of the present application thought of forming a microchannel between the mating surfaces of the two parts. The cross-section of the microchannel can be set to be smaller, so that it can allow gas to flow and block liquid from flowing out. The assembly gap can be made slightly larger to facilitate the passage of external gas, and also to facilitate the assembly gaps of products on the same production line to be not much different.

[0080] Specifically, refer to Figure 3 The housing 100 may include a housing 130 and a cover 140. The housing 130 may include a top wall and a side wall. The side wall of the housing 130 may be connected to the outer periphery of the top wall of the housing 130 and may extend along the first axis. The top wall of the housing 130 may have a through hole 530 through which the output shaft 210 of the power supply 200 passes. The housing 130 may have an opening, which may be as shown in FIG. Figure 3 As shown, the opening is disposed at one end of the shell 130 along the first axis direction and may be disposed opposite to the top wall of the shell 130 ; alternatively, the opening may be disposed on the side wall of the shell 130 .

[0081] 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 shell. The cover 140 and the shell 130 can be nested with each other along a preset direction. The preset direction can be the first axis direction, or can be a direction intersecting the first axis direction.

[0082] Specifically, the cover 140 may include a bottom wall and a side wall. The side wall of the cover 140 may be connected to the periphery of the bottom wall of the cover 140 and extend in a certain direction. The side wall and the bottom wall of the cover 140 may form an inner cavity of the cover 140 with one end open. Figure 3 Alternatively, the side wall of the cover 140 can be sleeved on the outside of the housing 130. In addition, the cover 140 and the housing 130 can form at least part of the liquid storage cavity 120.

[0083] refer to Figure 8 and Fig. 9 The cover 140 may have a first mating surface 145, the housing 130 may have a second mating surface 131 disposed opposite to the first mating surface 145, and an assembly gap 190 may be formed between the first mating surface 145 and the second mating surface 131. Figure 3In the embodiment, the cover 140 can be embedded in the inner cavity of the shell 130, the outer side of the cover 140 embedded in the shell 130 can be the first mating surface 145, and the outer side of the shell 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 shell 130, the inner side of the cover 140 can be the first mating surface 145, and the outer side of the shell 130 can be the second mating surface 131. In this way, the gas flow channel can be hidden inside the device to avoid blocking the gas flow channel, which has the advantages of easy ventilation and non-porous appearance.

[0084] In addition, a microchannel 180 may be formed between the housing 130 and the cover 140. The microchannel 180 can allow gas to pass through along the first axis direction and block the outflow of liquid, and the microchannel 180 uses the assembly gap 190 between the housing 130 and the cover 140 to connect the liquid storage cavity 120 with the outside. Optionally, in a preset direction, the liquid storage cavity 120 may be higher than the microchannel 180. So that the water level in the liquid storage cavity 120 can be higher than the microchannel 180.

[0085] Specifically, the liquid level in the liquid storage cavity 120 may be higher than the microchannel 180, so that a pressure difference may be formed between the external air pressure (one atmosphere) and the air pressure in the liquid storage cavity 120 (less than one atmosphere). Under the action of this pressure difference, gas can be allowed to flow and liquid can be blocked from flowing out, so as to achieve the purpose of ventilation and leak prevention. It is worth noting that the "blocking liquid outflow" mentioned above can be understood in a broad sense, which means that when the oral cleaning device 1000 is in a static state or the user is holding it normally, the microchannel 180 can block the liquid from flowing out. When the user shakes it vigorously, the surface tension may be destroyed, affecting the air pressure, causing the liquid to leak out of the microchannel 180.

[0086] Reference below Figure 8 and Fig. 9 To describe the formation method of the microchannel 180. Specifically, the side wall of one of the shell 130 and the cover body 140 may be provided with a third sealing groove 141, and the third sealing groove 141 may have an opening facing outward. The side wall of the other of the shell 130 and the cover body 140 may be combined with the third sealing groove 141 to form a third sealed cavity 142, and the third sealed cavity 142 may connect the liquid storage cavity 120 with the outside through the assembly gap 190. The bottom of the third sealing groove 141 may be provided with an airflow groove 143, and the airflow groove 143 may have an opening facing the third sealed cavity 142.

[0087] For example, Figure 8 Zhongyu Fig. 9In the embodiment, the cover 140 is embedded in the inner cavity of the shell 130, and the side wall of the cover 140 may be provided with a third sealing groove 141, and the third sealing groove 141 may have an opening facing outward. The side wall of the shell 130 and the third sealing groove 141 may enclose a third sealed cavity 142. For another example, the cover 140 may be sleeved on the outer side of the shell 130, and the side wall of the shell 130 may be provided with a third sealing groove 141, and the third sealing groove 141 may have an opening facing outward. The side wall of the cover 140 and the third sealing groove 141 may enclose a third sealed cavity 142.

[0088] Fig.10 This is a cross-sectional view of the housing 100 provided in the embodiment of the present application at the non-airflow slot 143. Fig.10 The housing 100 may further include a third sealing member 830, which may be clamped between the inner side wall of the other of the housing 130 and the cover 140 and the bottom of the third sealing groove 141. The cross-sectional shape of the third sealing member 830 may be circular, polygonal, etc., and the embodiment of the present application does not specifically limit the cross-sectional shape of the third sealing member 830.

[0089] Continue to refer Figure 8 and Fig. 9 , a microchannel 180 is formed between the surface of the third seal 830 close to the airflow groove 143 and the airflow groove 143. In this way, the sealed cavity is sealed by the third seal 830 at the non-airflow groove 143. A microchannel 180 is formed at the airflow groove 143 for gas to flow through and to block the flow of liquid. The processing depth of the airflow groove 143 is generally relatively precise, so that the size of the formed microchannel 180 can be accurately controlled. In this way, the housing 100 provided in the embodiment of the present application can not only achieve ventilation and liquid blocking, but also has a high yield rate. In addition, when the pump mechanism 300 sucks liquid, the third seal 830 will be flattened and deformed, thereby increasing the assembly gap, which is more conducive to air intake.

[0090] 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 air flow groove 143 is located satisfies the following condition: 0<ρ*g*h≤30%*Po; wherein ρ represents the air density; g represents the liquid density; Po represents one atmospheric pressure. wherein ρ represents the air density; g represents the liquid density; Po represents one atmospheric pressure.

[0091] Specifically, the greater the difference between the liquid pressure in the liquid storage cavity 120 and the external atmospheric pressure, the more the gas can flow from the outside into the liquid storage cavity 120, and the more liquid leakage can be avoided. Conversely, the smaller the difference between the liquid pressure in the liquid storage cavity 120 and the external atmospheric pressure, the less likely the gas is to flow from the outside into the liquid storage cavity 120, and liquid leakage may occur. The inventors of the present application have verified that when the liquid level difference h meets the above conditions, the microchannel 180 can pass the gas and prevent the liquid from leaking out.

[0092] In order to further prevent liquid from leaking out, the liquid level difference h may satisfy 0<ρ*g*h≤20%*Po; in order to further prevent liquid from leaking out, the liquid level difference h may satisfy 0<ρ*g*h≤10%*Po. For example, ρ*g*h≤10%*Po, ρ*g*h≤5%*Po, ρ*g*h≤1%*Po.

[0093] Further, the depth of the airflow groove 143 may range from 0.1 mm to 0.4 mm, so as to block the passage of liquid while the gas passes through. For example, the depth of the airflow groove 143 may be 0.1 mm, 0.3 mm, 0.4 mm, etc. Further, the depth of the airflow groove 143 may range from 0.25 mm to 0.34 mm, so as to further facilitate air ventilation and liquid blocking. For example, the depth of the airflow groove 143 may be 0.25 mm, 0.30 mm, 0.34 mm, etc.

[0094] In the preset direction, the third sealing groove 141 can be Figure 8 and Fig. 9 The third sealing groove 141 may have two groove side walls that are opposite to each other, and the groove bottom wall may be connected between the two groove side walls; alternatively, the third sealing groove 141 may have a first groove side wall that may be used to support one side of the third sealing member 830 .

[0095] When the third sealing member 830 has two groove side walls, in order to allow the gas in the third sealing cavity 142 to flow in and out, for example, refer to Figure 8 In the preset direction, the height of the third sealing member 830 can be less than the height of the bottom wall of the groove. In this way, a channel connected to the microchannel 180 can be formed between the third sealing member 830 and one of the groove side walls, and a channel connected to the microchannel 180 can also be formed between the third sealing member 830 and the other groove side wall. In this way, the gas entering the third sealed cavity 142 can be Figure 8 The arrows shown indicate that the gas flows out of the third sealed cavity 142 after circumnavigating the third sealing member 830 for at least half a circle. Fig.11 As shown, it penetrates the bottom wall of the groove along a preset direction.

[0096] Another exemplary reference Fig. 9 , both inner side walls may be provided with guide grooves 144, the guide grooves 144 may have an opening toward the third sealed cavity 142, and a channel for gas to flow through may be formed between the guide grooves 144 and the third sealing member, and the channel is connected to the microchannel 180. The gas entering the third sealed cavity 142 is connected to the microchannel 180 through the channel. Fig. 9 The arrows shown indicate that the liquid flows out of the third sealing cavity 142 after surrounding the third sealing member 830 for at least half a circle. Further, the guide groove 144 may penetrate the groove side wall in a direction perpendicular to the groove bottom wall.

[0097] Similarly, when the third sealing member 830 has a groove side wall, the gas inflow and outflow in the third sealing cavity 142 can be achieved by reducing the height of the third sealing member 830 or providing a guide groove 144 on the groove side wall.

[0098] Optional, reference Fig.11 The circumferential length of the airflow groove 143 is shorter than the circumferential length of the sealing groove. There can be one or more airflow grooves 143. When there are multiple airflow grooves 143, the multiple airflow grooves 143 can be arranged at intervals.

[0099] 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 removed from the shell 130 to achieve the purpose of rapid drainage.

[0100] Fig.12 This is an exploded view of the oral cleaning device provided in an embodiment of the present application. Fig.12 The oral cleaning device provided in the embodiment of the present application may further include a mounting member 500. For ease of assembly, the mounting member 500 is fixed to the inner shell wall of the housing 100, and the motor 200 and the pump mechanism 300 may be mounted on the mounting member 500. Thus, during assembly, the motor 200 and the pump mechanism 300 may be first assembled on the mounting member 500, and then the two may be assembled into the housing 100 as a whole.

[0101] It should be noted that the motor 200 and the pump mechanism 300 will both generate vibrations during operation, which makes the connection reliability of the pipeline between the liquid outlet 320 of the pump mechanism 300 and the first flow channel 211 of the output shaft 210 poor and very easy to fall off. In view of the above problems, the inventor of the present application has the idea of ​​disassembling the pump mechanism 300 into the power end 330, the liquid inlet end 310 and the liquid outlet end 320, and integrating the liquid outlet end 320 on the connector 400 and the mounting member 500, so as to reduce the resonance and improve the connection reliability of the connection between the second flow channel 410 of the connector 400 and the liquid outlet end 320 of the pump mechanism 300.

[0102] Specifically, refer to Figure 13-Figure 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 (second axis direction) of the liquid outlet end 320, and can be connected by a third fastener 923. In this way, the mounting member 500 is blocked between the connecting member 400 and the power end 330 of the pump mechanism 300, so that most of the vibration of the pump body is transmitted to the mounting member 500. A vibration damping member may be provided between the mounting member 500 and the inner shell wall of the housing 100, and the mounting member 500 may eliminate vibration through vibration-damping connection, thereby making the vibration transmitted from the power end 330 of the pump mechanism 300 to the connecting member 400 small or even absent, thus reducing the influence of the vibration of the power end 330 of the pump mechanism 300 on the connecting member 400, and improving the connection reliability of the connection point between the second flow channel 410 of the connecting member 400 and the liquid outlet end 320 of the pump mechanism 300. In addition, integrating the liquid outlet end 320 on the mounting member 500 and the connecting member 400 is not only convenient for assembly, but also makes the water path shorter and the connection reliability stronger.

[0103] Optionally, 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 may cover the opening, and the mounting member 500 and the pump housing 331 may enclose a pump chamber of the pump mechanism 300 for the piston 332 to reciprocate along the liquid discharge direction of the liquid discharge end 320. The mounting member 500 may have a liquid discharge hole that penetrates the mounting member 500 and communicates with the pump chamber of the pump mechanism 300, and the second valve portion 321 of the liquid discharge end 320 is disposed at the liquid discharge hole, and the second valve portion 321 of the liquid discharge end 320 may allow liquid to be pumped out from the pump chamber through the liquid discharge hole, and prevent liquid from flowing into the pump chamber through the liquid discharge hole.

[0104] Specifically, the piston 332 reciprocates in the pump cavity, so that the liquid in the pump cavity can be pumped out from the liquid outlet hole; the valve of the liquid outlet end 320 has a one-way conduction function to prevent the liquid from flowing back into the pump cavity through the liquid outlet hole. In this solution, the pump cavity and the liquid outlet hole are formed by the mounting member 500, so as to achieve the purpose of integrating the valve part of the liquid outlet end 320.

[0105] Optional, reference Fig.16 The power end 330 may further include a driving member 333, and the driving member 333 may have a driving shaft that rotates relative to the pump housing 331. The driving shaft may drive the eccentric wheel to rotate relative to the pump housing 331, and the eccentric wheel may push against the piston 332 to perform reciprocating motion.

[0106] refer to Figure 15-17Optionally, at least part of the connecting member 400 and the second end cover portion 322 of the liquid outlet end 320 may be an integral part formed by an integral molding process. The second end cover portion 322 of the liquid outlet end 320 may cover the liquid outlet hole, and the second end cover portion 322 of the liquid outlet end 320 may be formed with a liquid outlet channel connecting the liquid outlet hole and the second flow channel 410.

[0107] Specifically, the liquid outlet channel 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 solution, the connector 400 and the second end cover portion 322 of the liquid outlet end 320 are integrated, so that the liquid outlet channel and the second flow channel 410 are integrated, so as to improve the connection reliability of the connection point, improve the smoothness of the liquid flow, and improve the convenience of assembly.

[0108] Optionally, the mounting member 500 may have a liquid inlet hole that passes through the mounting member 500 and can communicate with the pump chamber of the pump mechanism 300. The first valve portion 311 of the liquid inlet end 310 may be disposed at the liquid inlet hole, and the first valve portion 311 of the liquid inlet end 310 may allow liquid to be pumped into the pump chamber through the liquid inlet hole and prevent the liquid from flowing out through the liquid inlet hole.

[0109] Specifically, the piston 332 reciprocates in the pump cavity, so that the liquid can be pumped into the pump cavity from the liquid inlet hole; the valve of the liquid inlet end 310 has a one-way conduction function to prevent the liquid from flowing out through the liquid inlet hole. In this solution, the pump cavity and the liquid inlet hole are formed by the mounting member 500, so as to achieve the purpose of integrating the first valve part 311 of the liquid inlet end 310.

[0110] Optionally, at least part of the connector 400 and the first end cover portion 312 of the liquid inlet end 310 may be an integral part formed by an integral molding process, and the first end cover portion 312 of the liquid inlet end 310 may cover the liquid inlet hole, and the first end cover portion 312 of the liquid inlet end 310 may be formed with a liquid inlet flow channel connected to the liquid inlet hole, and the liquid inlet flow channel may be connected to the third flow channel 420 of the connector 400. In this way, the liquid inlet channel of the first end cover portion 312 of the liquid inlet end 310 can guide the flow direction of the liquid flowing into the liquid inlet hole. In this solution, the connector 400 and the first end cover portion 312 of the liquid inlet end 310 are integrated, so that the liquid inlet channel and the third flow channel 420 are integrated, so as to improve the connection reliability of the connection point, improve the smoothness of the liquid flow, and improve the convenience of assembly.

[0111] refer to Figure 13-Figure 16Optionally, the mounting member 500 may include a first mounting portion 510, and the first mounting portion 510 may have a first side and a second side disposed oppositely along the liquid outlet direction of the liquid outlet end 320. The motor 200 and the power end 330 of the pump mechanism 300 may be disposed at a first side of the first mounting portion 510 at intervals along the axial direction of the output shaft 210. The portion of the connector 400 integrated with the second end cover portion 322 of the liquid outlet end 320 may be disposed on the second side of the first mounting portion 510. The mounting member 500 may have a through hole 530 for the connector 400 to pass through and limit at least one side of the connector 400 along the axial direction of the output shaft 210. In this way, the through hole 530 may be used to limit the connector 400, so as to provide upward support and limit for the connector 400, so as to prevent the connector 400 from vibrating up and down. Optionally, the circuit board 720 may be mounted on the side of the first mounting portion 510 away from the motor 200 through the third fastener 924. A fourth vibration damper 914 may be disposed between the circuit board 720 and the inner wall of the housing 100 .

[0112] refer to Fig.12 and Fig.13 Optionally, the mounting member 500 may further include a second mounting portion 520, and the second mounting portion 520 may be mateably connected to the first side of the first mounting portion 510, and the second mounting portion 520 and the first mounting portion 510 may be combined to form a receiving space for wrapping the outer side surface of the motor 200. In this way, the mounting member 500 is wrapped around the outer side surface of the motor 200, so that most of the vibration of the motor 200 is transmitted to the mounting member 500, thereby making the vibration transmitted from the motor 200 to the connecting member 400 small or even zero, thereby 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, refer to Fig.13 The first mounting portion 510 and the second mounting portion 520 may be fastened and connected via a second fastener 922 .

[0113] Optionally, a vibration damper is sandwiched between the first mounting portion 510 and the outer side of the motor 200; and / or, a vibration damper is sandwiched between the second mounting portion 520 and the outer side of the motor 200. In this way, the vibration damper can reduce the vibration transmission between the motor 200 and the mounting member 500. For example, Fig.13 In the embodiment, 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 .

[0114] refer to Fig.17Optionally, the connector 400 may have a mounting groove 450 into which the output shaft 210 of the power supply machine 200 penetrates, 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 channel 211 of the output shaft 210 and the second flow channel 410 of the connector 400 may be connected at the mounting groove 450, and the provision of a sealing member may prevent liquid from leaking out of the connection.

[0115] Continue to refer Fig.17 Optionally, the motor 200 may include a motor body 220 and an output shaft 210. The output shaft 210 of the motor 200 may be inserted into the motor body 220, and both axial ends of the output shaft 210 may pass through the motor body 220. The bottom surface of the motor body 220 and the inner groove wall of the mounting groove 450 may be combined to form a restricted space for restricting the fourth seal 840. The restricted space may restrict both ends of the fourth seal 840 in the axial direction of the output shaft 210. In this way, the fourth seal 840 may be restricted by the bottom surface of the motor body 220 of the motor 200 and the groove bottom wall of the mounting groove 450 to prevent the fourth seal 840 from moving with vibration.

[0116] refer to Fig.17 , the second flow channel 410 may include a first flow segment 411 and a second flow segment 412 that are connected in sequence. The first flow segment 411 is connected to the liquid outlet 320 and may extend along the first axis direction, and there is a distance between the first flow segment 411 and the first flow channel 211 in the second axis direction. The second flow segment 412 may connect the first flow segment 411 and the first flow channel 211, and the second flow segment 412 may include a first arc segment 4121, and the first arc segment 4121 may have an arc transition with the first flow segment 411. The arc transition is used to reduce the resistance of the inner wall of the flow channel to the liquid, which is beneficial to the flow of the liquid.

[0117] Furthermore, the first arc segment 4121 may be higher than the pump mechanism 300 , and the first arc segment 4121 may have an arc center facing the pump mechanism 300 , so that the liquid flows more smoothly toward the first flow channel 211 , thereby further reducing the resistance of the flow channel inner wall to the liquid.

[0118] Optionally, the second flow segment 412 further includes a second arc segment 4122, and a circular arc transition is formed between the second arc segment 4122 and the first flow channel 211. The circular arc transition is used to reduce the resistance of the inner wall of the flow channel to the liquid, thereby facilitating the flow of the liquid.

[0119] Furthermore, the second arc segment 4122 has an arc center facing the motor 200 , so that the second arc segment 4122 and the first flow channel 211 are smoothly connected, which is beneficial to the flow of liquid.

[0120] refer to Fig.17 and Fig.18Optionally, the connector 400 may include a first connector 430 and a second connector 440 connected to each other. The first connector 430 may include a first flow segment 411 and a reversing cavity 431 connected to the first flow segment 411, the reversing cavity 431 may include a first inner arc surface 432, and the reversing cavity 431 may include an opening in the first axial direction. At least a portion of the second connector 440 may be built into the reversing cavity 431 through the opening of the reversing cavity 431 and may include a second inner arc surface 441. The first inner arc surface 432 and the second inner arc surface 441 may enclose the second flow segment 412.

[0121] Specifically, the second connecting portion 440 may include a cover plate segment 442, a protruding segment 443, and a baffle segment 444. The protruding segment 443 and the baffle segment 444 may be connected to both sides of the cover plate segment 442 along the first axis direction, respectively. The cover plate segment 442 may cover the reversing cavity 431, and the baffle segment 444 may be located in the reversing cavity 431 and may have a second inner arc surface 441. The cover plate segment 442 may be provided with a through hole, the protruding segment 443 may surround the outside of the through hole, and the inner cavity of the protruding segment 443 may be connected to the through hole. The output shaft 210 may be inserted into the inner cavity and the through hole of the protruding segment 443, and a fourth sealing member 840 is provided between the output shaft 210 and the inner cavity wall of the protruding segment 443. In this way, the protruding segment 443 and part of the cover plate segment 442 may form the mounting groove 450 mentioned above.

[0122] Among them, the terms "upper" and "lower" are used to describe the relative position relationship of each structure in the accompanying drawings, which is only for the convenience of description and is not used to limit the scope of implementation of the present application. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the present application without substantially changing the technical content.

[0123] It should be noted that: in this application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0124] In addition, in this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0125] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to 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 invention comprises a shell (130) and a cover (140), wherein the shell (130) has an opening, and the cover (140) covers the opening of the shell (130); the cover (140) and the shell (130) are mutually nested along a preset direction, and the cover (140) and the shell (130) define a liquid storage cavity (120); A microchannel (180) is formed between the shell (130) and the cover body (140); the microchannel (180) can allow gas to pass through along the preset direction and block liquid from flowing out, and 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.

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

3. The housing for oral cleaning according to claim 2, characterized in that: The liquid level difference h formed by the height of the highest liquid level of the liquid storage cavity (120) and the height of the horizontal plane where the air flow groove (143) is located satisfies the following conditions: 0<ρ*g*h≤30%*Po; wherein, ρ represents the air density; g represents the liquid density; 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<ρ*g*h≤20%*Po.

5. The housing for oral cleaning according to claim 3, characterized in that: The height difference h satisfies the following condition: 0<ρ*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, characterized in that: The sealing groove (141) comprises a groove bottom wall and two groove side walls, wherein the two groove side walls are connected to two sides of the groove bottom wall along the preset direction; In the preset direction, the height of the sealing member (830) is smaller 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, characterized in that: The sealing groove (141) comprises a groove bottom wall and two groove side walls, wherein the two groove side walls are connected to two sides of the groove bottom wall along the preset direction; The two inner side walls are each provided with a guide groove (144), the guide groove (144) having an opening facing the sealing cavity (142), and a channel for gas to flow through is formed between the guide groove (144) and the sealing member (830), and the channel is in communication with the microchannel (180); The gas entering the sealed cavity (142) flows through the channel and the microchannel (180), surrounds the sealing element (830) for at least half a circle, and then flows out of the sealed cavity (142).

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

12. The housing for oral cleaning according to any one of claims 5 to 11, characterized in that: The circumferential length of the airflow groove (143) is shorter than the circumferential length of the sealing groove (141).

13. An oral cleaning device, characterized in that: The invention comprises a pump mechanism (300), a cleaning attachment (2000) and a housing (100) for oral cleaning according to any one of claims 1 to 12, wherein the pump mechanism (300) is arranged in the inner cavity of the housing (100), the cleaning attachment (2000) has a connected cavity (2200) and an outflow port (2300), the cavity (2200) of the cleaning attachment (2000) is connected to the liquid outlet (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 attachment (2000), and the liquid flows out from the outflow port (2300).

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