Oral cleaning device

Abstract

The utility model relates to an oral cavity cleaning device. The oral cavity cleaning device comprises a holding part, a pump assembly, an output shaft and a cleaning piece. A power cavity and a liquid storage cavity are formed in the holding part, and the volume of the liquid storage cavity ranges from 40 ml to 60 ml; the pump assembly comprises a shell with a pumping cavity and a displacement mechanism. The shell is provided with a liquid inlet flow channel and a liquid outlet flow channel which are communicated with the pumping cavity, and the liquid inlet flow channel is communicated to the liquid storage cavity; liquid in the liquid storage cavity flows into the pumping cavity through the liquid inlet flow channel and flows out through the liquid outlet flow channel under the action of movement and extrusion of the displacement mechanism; the maximum volume of the pumping cavity is in a range of 100 to 250 mm < 3 >; a hollow runner communicated with the liquid outlet runner is arranged in the output shaft; the cleaning piece comprises a nozzle communicated with the hollow flow channel; the end, away from the holding part, of the nozzle is enclosed to form a spraying end, and the pump assembly pumps liquid in the liquid storage cavity to the spraying end through the hollow flow channel. The inner diameter of the spraying end ranges from 0.5 mm to 0.6 mm.

Description

Technical Field

[0001] This disclosure relates to the field of oral care technology, specifically to an oral cleaning device. Background Technology

[0002] With the increasing awareness of oral health among the public, the market demand for oral care equipment with deep cleaning functions continues to grow. Among them, oral cleaning equipment with water flossers and brush-flushing combos can effectively remove plaque and food debris from teeth by pumping out a high-speed water jet with a certain pressure and using the impact force of the high-speed water jet to clean teeth and between teeth.

[0003] Existing oral hygiene products often employ miniaturized designs, resulting in small water tank capacities. A single tank of water is quickly depleted, requiring users to refill it multiple times during a single use, leading to a poor user experience. Furthermore, existing water pumps have excessively high flow rates per unit time. Directly reducing the flow rate can significantly weaken the water's impact force, reducing cleaning effectiveness. Therefore, how to maintain sufficient water impact force while miniaturizing the water tank is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] This disclosure provides an oral cleaning device to address the problems existing in the prior art.

[0005] According to a first aspect of this disclosure, an oral hygiene device is provided, comprising:

[0006] The grip extends along the first axis and is provided with a power chamber and a liquid storage chamber; the volume of the liquid storage chamber is in the range of 40-60 ml.

[0007] A pump assembly is disposed within the power chamber; the pump assembly includes a housing and a displacement mechanism engaged with the housing; a pumping chamber is provided within the housing, and the housing is provided with an inlet channel and an outlet channel respectively communicating with the pumping chamber; the inlet channel is configured to communicate with the storage chamber; liquid in the storage chamber is configured to flow into the pumping chamber through the inlet channel and to flow out through the outlet channel under the squeezing action of the displacement mechanism; the maximum volume of the pumping chamber is 100-250 mm². 3 Within the range;

[0008] An output shaft extends along a first axis, and a hollow flow channel extending along the first axis is provided inside the output shaft. The hollow flow channel is configured to communicate with the liquid outlet flow channel.

[0009] A cleaning component is disposed at one end of the grip portion and includes a nozzle configured to communicate with the hollow flow channel; the end of the nozzle away from the grip portion forms a spray end, and the pump assembly is configured to pump liquid in the reservoir through the hollow flow channel to the spray end; the inner diameter of the spray end is in the range of 0.5-0.6 mm.

[0010] In one embodiment of this disclosure, the inner diameter of the injection end is in the range of 0.53-0.57 mm.

[0011] In one embodiment of this disclosure, a control component is also included, which controls the operation of the pump assembly to cause the cleaning element to perform periodic cleaning movements.

[0012] The control component starts the pump assembly, and shuts down the pump assembly when the pump assembly has been running continuously for a first preset time.

[0013] When the pump assembly remains closed for a second preset time, the pump assembly is turned on.

[0014] When the pump assembly has been running continuously for a third preset time, the pump assembly is shut down;

[0015] When the pump assembly remains closed for a fourth preset time, the pump assembly is turned on.

[0016] The sum of the first preset time and the third preset time is within the range of 200-230 milliseconds.

[0017] In one embodiment of this disclosure, a drive element is also included, and the cleaning element further includes a bristle element;

[0018] During a second preset time period after the pump assembly is shut down, the drive unit is controlled to operate for at least a portion of the time to drive the brush element to vibrate; and / or,

[0019] During a fourth preset time period after the pump assembly is shut down, the drive unit is controlled to operate for at least a portion of the time to drive the brush element to vibrate.

[0020] In one embodiment of this disclosure, the first preset time is less than the third preset time, and / or the sum of the second preset time and the fourth preset time is greater than the sum of the first preset time and the third preset time, and / or the second preset time is less than the fourth preset time.

[0021] In one embodiment of this disclosure, the first preset time is in the range of 80-110 milliseconds, and / or the third preset time is in the range of 100-140 milliseconds.

[0022] In one embodiment of this disclosure, a diaphragm is provided on the side of the displacement mechanism facing a first direction, the diaphragm being configured to enclose and form the pumping cavity; the pump assembly further includes an eccentric mechanism, the eccentric mechanism being drively connected to the side of the displacement mechanism facing a second direction, the second direction being opposite to the first direction; the eccentric mechanism is configured to drive the displacement mechanism to reciprocate along the first direction and the second direction during rotation, so as to cyclically decrease and increase the volume of the pumping cavity.

[0023] In one embodiment of this disclosure, the housing includes a valve plate, which, together with the diaphragm, forms the pumping chamber; the valve plate is provided with an inlet hole communicating with the inlet channel and an outlet hole communicating with the outlet channel; the diameter of the inlet hole is in the range of 1.5-3 mm, and / or the diameter of the outlet hole is in the range of 1.5-3 mm.

[0024] In one embodiment of this disclosure, the diameter of the liquid outlet is greater than or equal to the diameter of the liquid inlet.

[0025] In one embodiment of this disclosure, the displacement mechanism is capable of moving to a first limit position along the first direction and to a second limit position along the second direction; when located at the first limit position, at least a portion of the diaphragm is configured to bend toward the first direction, and the wall surface of the valve plate facing the second direction is configured to adapt to the shape of the diaphragm when located at the first limit position.

[0026] In one embodiment of this disclosure, when in the second extreme position, at least a portion of the diaphragm is configured to extend 0.5-1 mm toward the second direction.

[0027] In one embodiment of this disclosure, the central region of the wall of the valve plate facing the second direction is constructed as a plane, and the surrounding region is constructed as an arcuate surface.

[0028] In one embodiment of this disclosure, the eccentric mechanism is an eccentric wheel, which is configured to have a rotation axis offset from its geometric center; wherein the eccentricity of the eccentric wheel is in the range of 0.6-1.4 mm.

[0029] In one embodiment of this disclosure, the cleaning component includes a main body and a nozzle disposed on the main body; the main body has a first flow channel communicating with the hollow flow channel and extending at least partially along the first axis; the nozzle has a second flow channel communicating with the first flow channel, the second flow channel being configured to extend along a second axis, the second axis intersecting the first axis, and the angle between the first axis and the second axis ranging from 60° to 120°.

[0030] In one embodiment of this disclosure, the angle between the first axis and the second axis is 90°.

[0031] In one embodiment of this disclosure, a third flow channel is further provided within the main body, the opposite ends of the third flow channel being connected to the first flow channel and the second flow channel respectively, and the third flow channel is configured to have a bending angle.

[0032] In one embodiment of this disclosure, the inner diameter of the liquid outlet channel is equal to the inner diameter of the hollow channel, and / or, the inner diameter of the first channel is equal to the inner diameter of the hollow channel, and / or, the inner diameter of the third channel is equal to the inner diameter of the first channel, and / or, the inner diameter of the end of the second channel away from the injection end is equal to the inner diameter of the third channel.

[0033] In one embodiment of this disclosure, a bristle element is provided on the main body portion, the bristle element including a bristle implant, the bristles being provided on the bristles and the bristles being configured to extend along the second axis in a direction away from the bristle implant.

[0034] In one embodiment of this disclosure, a drive element is also included, the drive element including the output shaft; the drive element is configured to drive the bristle element to oscillate.

[0035] In one embodiment of this disclosure, the second flow channel includes a constriction section, one end of which, away from the first flow channel, encloses the injection end; at least a portion of the inner diameter of the constriction section is configured to gradually decrease in a direction close to the injection end.

[0036] In one embodiment of this disclosure, the length of the contraction segment in the direction of the second axis is 1.8-3 mm, and / or, on the plane defined by the first axis and the second axis, the angle between the extension line of the wall of the contraction segment and the second axis is 7-13°.

[0037] In one embodiment of this disclosure, the second flow channel further includes a liquid inlet section configured to connect the first flow channel to the contraction section; the inner diameter of the liquid inlet section is configured to remain constant in the second axial direction.

[0038] One beneficial effect of this disclosure is that, through the coordinated design of the parameters of the liquid storage chamber, pumping chamber, and spray end, space utilization and cleaning performance are optimized. Specifically, the pumping chamber of the pump assembly has a relatively small volume, thereby reducing the amount of liquid pumped per cycle during operation, achieving water conservation, reducing the frequency of water contact for users, and improving the user experience. This disclosure also features a spray end with a smaller inner diameter, which, by reducing the liquid spray cross-sectional area, increases the flow velocity and impact force of the liquid when it is ejected from the spray end. Thus, even with a flow-throttling pump assembly, sufficient water impact force can still be guaranteed to effectively remove plaque and food residue from teeth and between teeth, improving cleaning effectiveness.

[0039] Furthermore, the liquid storage chamber of this disclosure has a smaller volume, thereby allowing more space for the power chamber. The power chamber has sufficient space to install other structures, such as an additional drive unit and a corresponding brush bristle element driven by that drive unit, thus enabling both brushing and flossing functions to be achieved in a single device. The multi-parameter coordinated setting of this disclosure balances the device's practicality, water conservation, and cleaning effect, significantly improving the overall user experience of oral hygiene devices.

[0040] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0041] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0042] Figure 1 This is a cross-sectional view of an oral cleaning device provided in an embodiment of this disclosure;

[0043] Figure 2 This is a cross-sectional view of a driving component and a cleaning component provided in an embodiment of this disclosure;

[0044] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0045] Figure 4 This is a partial cross-sectional view of a cleaning component provided in an embodiment of this disclosure, where the second flow channel includes an incoming liquid section;

[0046] Figure 5 This is a partial cross-sectional view of a nozzle provided in one embodiment of this disclosure;

[0047] Figure 6 yes Figure 5 The diagram shows the dimensions of the structure.

[0048] Figure 7This is a schematic diagram of the structure of an oral cleaning device provided in an embodiment of the present disclosure;

[0049] Figure 8 This is a cross-sectional view of a pump assembly provided in an embodiment of this disclosure;

[0050] Figure 9 yes Figure 8 A magnified view of the location of China Mobile's facilities;

[0051] Figure 10 This is a schematic diagram of a valve plate structure provided in an embodiment of the present disclosure;

[0052] Figure 11 This is a cross-sectional view of a valve plate provided in an embodiment of this disclosure.

[0053] Figures 1 to 11 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0054] 100. Pump assembly; 1. Housing; 10. Pumping chamber; 11. Valve plate; 111. Inlet port; 112. Outlet port; 113. Plane; 114. Arc-shaped surface; 2. Displacement mechanism; 21. Diaphragm; 3. Eccentric mechanism; 4. Drive mechanism; 41. Drive shaft; 7. Inlet channel; 8. Outlet channel; 200. Grip; 210. Power chamber; 220. Storage chamber; 300. Drive component; 310. Output shaft; 311. Hollow channel; 400. Cleaning component; 410. Main body; 411. First channel; 420. Nozzle; 421. Second channel; 4210. Contraction section; 4211. Jet end; 422. Inlet section; 430. Brush element; 431. Bristle attachment; 432. Brush; 440. Third channel; 500. Control assembly. Detailed Implementation

[0055] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0056] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0057] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0058] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0059] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0060] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0061] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0062] This disclosure provides an oral hygiene device, which can be a water flosser or a combined brush and rinsing device. The combined brush and rinsing device integrates toothbrush and water flossing functions. Specifically, the toothbrush function uses a motor to vibrate the brush head at high frequency, instantly breaking down toothpaste into fine foam for deep cleaning between teeth; the water flossing function uses a water pump to deliver a high-speed water jet with pressure, using the impact force of the water jet to clean teeth and between teeth. The combined brush and rinsing device integrates toothbrush and water flossing functions into a single device, thus achieving a more comprehensive cleaning effect.

[0063] The following description, in conjunction with the accompanying drawings of the embodiments of this disclosure, will take an oral cleaning device as an example of an integrated rinsing device, and will be clear and complete.

[0064] refer to Figure 1 , Figure 2 , Figure 7 and Figure 8 The oral cleaning device disclosed herein includes: a grip 200, a pump assembly 100, an output shaft 310, and a cleaning component 400. The grip 200 extends along a first axis, as shown below. Figure 2 As shown, the direction indicated by the X-axis is the extension direction of the first axis. The grip part 200 can be shaped like a slender cylinder, which makes it easy for the user to hold.

[0065] The grip portion 200 may be hollow, and contains a power chamber 210 and a liquid storage chamber 220. The liquid storage chamber 220 can be used to store liquid, such as water or mouthwash, which can be used for oral cleaning. Specifically, the liquid storage chamber 220 may be formed by a water tank independent of the grip portion 200, which can be detachably connected to the grip portion 200 so that the user can remove the water tank from the grip portion 200 for cleaning; alternatively, the liquid storage chamber 220 may be formed by the inner shell wall of the grip portion 200 and a partition, which can be disposed in the inner cavity of the grip portion 200 and divide the inner cavity of the grip portion 200 into the power chamber 210 and the liquid storage chamber 220. In a specific embodiment of this disclosure, the volume of the liquid storage chamber 220 is in the range of 40-60 ml.

[0066] The cleaning component 400 is disposed at one end of the grip portion 200. The cleaning component 400 can be a toothbrush head, a rinsing head, a rinsing and brushing integrated head, or other devices capable of cleaning the oral cavity. For example, when the oral cleaning device is a water flosser, the cleaning component 400 can be a rinsing head; when the oral cleaning device is a rinsing and brushing integrated device, the cleaning component 400 can be a rinsing and brushing integrated head.

[0067] In one embodiment of this disclosure, such as Figure 2 and Figure 3 As shown, taking the cleaning component 400 as an example of an integrated rinsing head: the cleaning component 400 may include a main body 410 connected to the grip 200. The main body 410 is provided with a nozzle 420 and a bristle element 430. The nozzle 420 is mainly used to achieve the rinsing function, and the bristle element 430 is mainly used to achieve the toothbrush function. Specifically, as... Figure 3 As shown, the bristle element 430 includes a bristle implant 431, on which bristles 432 are disposed. The bristles 432 are configured to extend along a second axis in a direction away from the bristle implant 431, and the second axis intersects the first axis. Figure 3 The direction shown by the Y-axis is the extension direction of the second axis.

[0068] In one specific embodiment of this disclosure, the angle between the first axis and the second axis is in the range of 60-120°, preferably 90°. The bristles 432 can be vertically arranged on the bristle implant 431 to form a traditional toothbrush configuration, which is convenient for users to clean their mouths.

[0069] The bristles 432 can be embedded in clusters on the bristle implant 431, which serves as the mounting base for the bristles 432 and helps to hold them in place. Bristles 432 may not be provided at the position corresponding to the nozzle 420 on the bristle implant 431. The nozzle 420 can penetrate the bristle implant 431 and extend along the second axis. The extension length of the nozzle 420 is relatively small compared to the bristles 432, thus concealing the nozzle 420 within the clusters of bristles 432 and preventing the relatively hard nozzle 420 from interfering with the brushing function of the oral hygiene device.

[0070] In one embodiment of this disclosure, the nozzle 420 is configured to be coupled to the bristle element 430, which is configured to be joined to the main body 410. Specifically, the nozzle 420 can be coupled to the bristle element 430 by means of laser welding or the like. The coupling process of the nozzle 420 must ensure a smooth transition and connection of the water channels inside the cleaning component 400, thereby minimizing flow resistance and increasing the speed and impact of the water flow. The bristle element 430 can be joined to the main body 410 by means of welding, snap-fit ​​fixing, tight fitting, secondary injection molding, etc., thereby ensuring the installation stability of the bristle element 430, preventing the bristles 432 from falling off after a period of use, and extending the service life of the oral cleaning device.

[0071] In the case where the cleaning element 400 is an integrated rinsing head, the oral hygiene device also includes a drive element 300, which includes an output shaft 310 and is configured to drive the bristle element 430 to oscillate. This drive element 300 is disposed together with the pump assembly 100 in the power chamber 210, see reference. Figure 1 The pump assembly 100 and the drive member 300 disposed in the power chamber 210 can be arranged sequentially along the first axis direction, thus maintaining the elongated shape requirement of the grip portion 200. The drive member 300 can be positioned closer to the top of the grip portion 200 than the pump assembly 100, so that the output shaft 310 of the drive member 300 can extend out of the top of the grip portion 200 and connect to the cleaning member 400 to drive the cleaning member 400 to move.

[0072] The drive unit 300 can be a rotary motor capable of rotating the cleaning component 400, or it can be a vibratory motor (such as a sonic motor) capable of causing the cleaning component 400 to oscillate at high frequency. The drive unit 300 may include a motor body and an output shaft 310, which extends along a first axis and can pass through the motor body axially. The top end of the output shaft 310 can extend out of the top end of the motor body and can be connected to the cleaning component 400. The drive unit 300 is configured to drive the bristle element 430 to oscillate, thereby achieving the effect of automatic tooth brushing.

[0073] It should be noted that when the oral cleaning device is a water flosser and the cleaning component 400 is a rinsing head, the drive component 300 does not need to be installed in the power chamber 210. In this case, the output shaft 310 is used to connect to the pump assembly 100 to realize the function of conveying liquid, and no longer has the functions of rotation, vibration, etc.

[0074] refer to Figure 7 and Figure 8 The pump assembly 100 is disposed in the power chamber 210. The pump assembly 100 includes a housing 1 and a displacement mechanism 2 engaged with the housing 1. A pumping chamber 10 is disposed inside the housing 1. The housing 1 is provided with an inlet channel 7 and an outlet channel 8 respectively communicating with the pumping chamber 10. The inlet channel 7 is configured to communicate with a storage chamber 220. The liquid in the storage chamber 220 is configured to flow into the pumping chamber 10 through the inlet channel 7 and to flow out through the outlet channel 8 under the squeezing action of the displacement mechanism 2. Specifically, the housing 1 is used to install and accommodate various structures and components of the pump assembly 100. The housing 1 includes a valve plate 11, which can be integrally formed with the housing 1 as part of the structure of the housing 1, or it can be a part fixedly mounted on the housing 1.

[0075] In one embodiment of this disclosure, reference is made to Figure 8 and Figure 9 A diaphragm 21 is provided on the side of the displacement mechanism 2 facing the first direction S1. The diaphragm 21 is configured to enclose and form the pumping chamber 10. Liquid from the inlet channel 7 flows into the pumping chamber 10 and flows out through the outlet channel 8 under the squeezing action of the diaphragm 21 during the movement of the displacement mechanism 2 towards the first direction S1. When the displacement mechanism 2 moves, the volume of the pumping chamber 10 changes, thereby causing a change in the pressure inside the pumping chamber 10. This allows the fluid to be pumped out from the outlet channel 8 using pressure.

[0076] In one embodiment of this disclosure, such as Figure 8 As shown, the pump assembly 100 also includes a drive mechanism 4 and an eccentric mechanism 3. The eccentric mechanism 3 is configured to rotate under the action of the drive mechanism 4, and during rotation, it drives the displacement mechanism 2 to reciprocate, thereby cyclically decreasing and increasing the volume of the pumping chamber 10. Specifically, the eccentric mechanism 3 can be an eccentric wheel, which is configured to have a rotation axis offset from its geometric center. Figure 8As shown, the eccentric mechanism 3 is connected to the displacement mechanism 2 on the side facing the second direction S2, which is opposite to the first direction S1. The drive mechanism 4 is coupled to the housing 1 and connected to the eccentric mechanism 3, thereby driving the eccentric mechanism 3 to rotate. The drive mechanism 4 includes a drive shaft 41. The eccentric mechanism 3 may be provided with a shaft hole offset from its geometric center. The rotation center line of the eccentric mechanism 3 is the central axis of the shaft hole. The drive shaft 41 passes through the shaft hole. When the drive mechanism 4 is working, the drive shaft 41 can drive the eccentric mechanism 3 to rotate. During the rotation, the eccentric mechanism 3 drives the displacement mechanism 2 to reciprocate along the first direction S1 and the second direction S2, thereby realizing the cyclic reduction and increase of the volume of the pumping chamber 10.

[0077] In one embodiment of this disclosure, the eccentricity of the eccentric wheel is in the range of 0.6-1.4 mm. More preferably, the eccentricity of the eccentric wheel is in the range of 0.8-1.2 mm. The eccentricity of the eccentric wheel in this disclosure is smaller than that in the prior art, thereby enabling the pump assembly 100 to have a stronger throttling effect. Specifically, compared with the conventional eccentric wheel drive scheme with a larger eccentricity in the prior art, this disclosure limits the eccentricity of the eccentric wheel to 0.6-1.4 mm (preferably 0.8-1.2 mm). This size range significantly reduces the reciprocating stroke of the drive displacement mechanism 2 when the eccentric wheel rotates, thereby directly reducing the magnitude of the volume change of the pumping chamber 10. The smaller eccentricity allows the displacement of the displacement mechanism 2 to be strictly controlled, and the volume change rate of the pumping chamber 10 is reduced accordingly, thereby effectively suppressing the liquid flow rate output per unit time and achieving the effect of throttling and saving water.

[0078] In one embodiment of this disclosure, the displacement mechanism 2 is capable of moving to a first limit position along a first direction S1 and to a second limit position along a second direction S2. It is understood that when the displacement mechanism 2 is in the second limit position, the pumping chamber 10 has its maximum volume, which is between 100 and 250 mm². 3 Within the range of [specific parameters], the volume of the pumping chamber 10 of this disclosure is smaller than that of the prior art, thereby enabling the pump assembly 100 to have a stronger throttling effect and allowing the overall size of the pump assembly 100 to be reduced, thus enabling its application in micro-sized devices. Furthermore, as mentioned above, this disclosure also reduces the eccentricity of the eccentric wheel, thereby reducing the magnitude of volume change in the pumping chamber 10, thus allowing for adaptive adjustment of the volume of the pumping chamber 10, thereby improving the water-saving effect.

[0079] refer to Figure 2 and Figure 3A hollow flow channel 311 extending along a first axis is provided inside the output shaft 310, and the hollow flow channel 311 is configured to communicate with the liquid outlet flow channel 8. The nozzle 420 of the cleaning component 400 is configured to communicate with the hollow flow channel 311. Specifically, the end of the nozzle 420 away from the grip portion 200 forms a spray end 4211, and the pump assembly 100 is configured to pump the liquid in the storage chamber 220 through the hollow flow channel 311 to the spray end 4211. When the oral cleaning device performs the rinsing function, the pump assembly 100 can guide the liquid in the storage chamber 220 through the inlet flow channel 7, the pumping chamber 10, and the outlet flow channel 8 into the hollow flow channel 311, and then through the flow channels in the main body 410 of the cleaning component 400 and the nozzle 420, and flow out from the spray end 4211.

[0080] Furthermore, the inner diameter of the spray end 4211 is in the range of 0.5-0.6 mm, preferably in the range of 0.53-0.57 mm. Compared with the prior art, the inner diameter of the spray end 4211 of this disclosure is smaller, thereby increasing the flow rate of the liquid and thus enhancing the liquid jet impact force.

[0081] This disclosure optimizes space utilization and cleaning performance through the coordinated design of the parameters of the liquid storage chamber 220, the pumping chamber 10, and the spray end 4211. Specifically, the pumping chamber 10 of the pump assembly 100 has a relatively small volume, thereby reducing the amount of liquid pumped per cycle during operation, achieving water conservation, reducing the frequency of water contact for users, and improving the user experience. This disclosure also features a spray end 4211 with a smaller inner diameter, which reduces the liquid spray cross-sectional area, thereby increasing the flow velocity and impact force of the liquid when it is sprayed from the spray end 4211. Thus, even with the use of a flow-throttling pump assembly 100, sufficient water impact force can still be guaranteed to effectively remove plaque and food residue from teeth and between teeth, improving the cleaning effect.

[0082] Furthermore, the liquid storage chamber 220 of this disclosure has a smaller volume size, thereby allowing more space for the power chamber 210. The power chamber 210 has sufficient space to install other structures, such as an additional drive unit 300 and a corresponding brush bristle element 430 driven by the drive unit 300, thus enabling both brushing and flossing functions to be achieved with a single device. The multi-parameter coordinated setting of this disclosure balances the practicality of the device, water conservation, and cleaning effect, significantly improving the overall user experience of oral hygiene devices.

[0083] In one embodiment of this disclosure, reference is made to Figure 10The valve plate 11 is provided with an inlet hole 111 communicating with the inlet channel 7 and an outlet hole 112 communicating with the outlet channel 8. Further, on the side of the valve plate 11 away from the diaphragm 21, a first check valve communicating with the inlet channel 7 is provided at a position corresponding to the inlet hole 111, and a second check valve communicating with the outlet channel 8 is provided at a position corresponding to the outlet hole 112. The first and second check valves ensure the correct flow direction of the liquid and prevent backflow. Specifically, the liquid from the inlet channel 7 flows into the pumping chamber 10 through the inlet hole 111 via the first check valve. Under the squeezing and impact of the diaphragm 21, the liquid in the pumping chamber 10 flows out through the outlet hole 112 and the second check valve, exiting through the outlet channel 8.

[0084] In one specific embodiment of this disclosure, the diameter of the inlet hole 111 is in the range of 1.5-3 mm, and / or the diameter of the outlet hole 112 is in the range of 1.5-3 mm. Furthermore, the diameter of the outlet hole 112 is greater than or equal to the diameter of the inlet hole 111. This disclosure achieves optimized matching of the fluid passage of the pump assembly 100 by limiting the diameter parameters and proportional relationship of the inlet hole 111 and the outlet hole 112. Specifically, the pump assembly 100 of this disclosure uses a smaller eccentricity and a smaller pumping chamber 10 size, thus effectively reducing water consumption per unit time. The diameters of the inlet hole 111 and the outlet hole 112 are matched and coordinated with the aforementioned design, thereby ensuring output efficiency while precisely controlling the liquid flow rate. This disclosure limits the diameter range of the inlet hole 111 and / or outlet hole 112 to 1.5-3 mm. This size range not only accommodates the volume variation of the pumping chamber 10 caused by the small eccentricity, avoiding flow control failure due to excessively large or insufficient orifice diameter, but also provides a reasonable channel cross-sectional area for the flow rate and pressure of the liquid during the inlet and outlet processes.

[0085] Based on this, this disclosure further clarifies that the diameter of the outlet orifice 112 is greater than or equal to that of the inlet orifice 111. When the displacement mechanism 2 drives the diaphragm 21 to squeeze the pumping chamber, the larger outlet orifice 112 can reduce fluid resistance, allowing the liquid to be discharged at a higher speed under the instantaneous squeezing action of the diaphragm 21, avoiding pressure retention or flow loss caused by orifice bottleneck. Preferably, when the diameters of the outlet orifice 112 and the inlet orifice 111 are equal, the flow resistance characteristics of the inlet channel 7 and the outlet channel 8 tend to be consistent, thereby further improving the stability of fluid exchange.

[0086] In one embodiment of this disclosure, when in the first extreme position, at least a portion of the diaphragm 21 is configured to bend toward the first direction S1, and the wall surface of the valve plate 11 toward the second direction S2 is configured to match the shape of the diaphragm 21 when in the first extreme position. When the diaphragm 21 bends toward the first direction S1 to the first extreme position, its bending profile completely fits the wall surface of the valve plate 11 toward the second direction S2, thereby eliminating the dead space between the inner wall of the pumping chamber 10 and the diaphragm 21, so that the liquid in the pumping chamber 10 is completely squeezed out during the compression stroke, achieving "zero residue" drainage and significantly improving the fluid pumping efficiency of the pump assembly 100.

[0087] Specifically, refer to Figure 10 and Figure 11 The central region of the wall of the valve plate 11 facing the second direction is constructed as a plane 113, and the surrounding region is constructed as an arc-shaped surface 114, which can smoothly connect to the outer periphery of the plane 113. When in the first extreme position, the central region of the diaphragm 21 does not deform, while the elastic portion on the outer periphery of the diaphragm 21 can bend towards the first direction S1. The plane 113 region on the valve plate 11 corresponds to the central region of the diaphragm 21, and the arc-shaped surface 114 region on the valve plate 11 corresponds to the elastic portion of the diaphragm 21. This ensures that the wall of the valve plate 11 facing the second direction S2 matches the shape of the diaphragm 21 when it is in the first extreme position, allowing the liquid in the pumping chamber 10 to be completely squeezed out during the compression stroke.

[0088] In one embodiment of this disclosure, reference is made to Figure 9 When the diaphragm 21 is in the second extreme position, at least a portion of the diaphragm 21 is configured to extend 0.5-1 mm toward the second direction. Specifically, when the displacement mechanism 2 is in the relaxed position between the first and second extreme positions, the diaphragm 21 is essentially undeformed. At this time, the elastic portion of the diaphragm 21 is essentially unaffected by external forces, thus remaining essentially flat and undeformed. When the eccentric mechanism 3 drives the displacement mechanism 2 to move toward the second direction S2, the elastic portion will follow the eccentric mechanism 3 to move toward the second direction S2, causing at least a portion of the diaphragm 21 to extend toward the second direction; when the second extreme position is reached, the elastic portion reaches its maximum deformation. In this embodiment, the distance between the second extreme position and the relaxed position is 0.5-1 mm, which is the maximum distance at which the elastic portion deforms toward the second direction S2, i.e., the pre-tension distance of the diaphragm 21.

[0089] This disclosure pre-stretches at least a portion of the diaphragm 21 at the second extreme position, thereby giving the diaphragm 21 an elastic potential energy reserve. Compared to the prior art where the diaphragm 21 remains relaxed at the extreme position, this effectively increases the deformation stroke and rebound force of the diaphragm 21 during reciprocating motion. This allows the diaphragm 21 to generate a stronger restoring force when moving towards the first direction S1, thereby accelerating the rate at which the volume of the pumping chamber 10 decreases. This instantaneous speed increase is crucial for scenarios requiring pulsed high-pressure fluid output (such as the impact water flow of oral cleaning equipment), as it can form a more impactful fluid jet, effectively enhancing cleaning and impact effects.

[0090] In one embodiment of this disclosure, reference is made to Figure 2 and Figure 3 The main body 410 has a first flow channel 411 that communicates with the hollow flow channel 311 and extends at least partially along the first axis; the nozzle 420 has a second flow channel 421 that communicates with the first flow channel 411 and is configured to extend along the second axis. The end of the second flow channel 421 away from the first flow channel 411 forms a spray end 4211. The pump assembly 100 is configured to pump liquid from the liquid outlet flow channel 8 through the hollow flow channel 311, the first flow channel 411, and the second flow channel 421 to the spray end 4211.

[0091] Further, refer to Figures 3 to 5 The second flow channel 421 includes a constriction section 4210, the end of which, away from the first flow channel 411, encloses and forms a jet end 4211. At least a portion of the inner diameter of the constriction section 4210 is configured to gradually decrease in the direction approaching the jet end 4211. This disclosure forms a Venturi tube structure by providing a constriction section 4210 in the second flow channel 421 of the nozzle 420, the constriction section 4210 having at least a portion of its inner diameter gradually decreasing in the direction approaching the jet end 4211. When the pump assembly 100 pumps liquid through the constriction section 4210, the flow channel cross-section contracts due to the gradual decrease in the inner diameter of the flow channel. According to fluid mechanics principles, the fluid velocity increases as the cross-sectional area of ​​the flow channel decreases, thereby effectively converting the pressure energy of the liquid into kinetic energy, significantly increasing the velocity and impact force of the liquid ejected from the jet end 4211. Thus, even with a relatively throttling pump assembly 100, sufficient water impact force can still be guaranteed to effectively remove plaque and food residue from teeth and between teeth, improving the cleaning effect.

[0092] In one specific embodiment of this disclosure, such as Figure 6As shown, the length of the contraction section 4210 in the direction of the second axis is 1.8-3 mm, preferably 2-2.5 mm. The length of the contraction section 4210 should not be too short, otherwise insufficient liquid acceleration will occur, affecting the cleaning effect; the length of the contraction section 4210 should not be too long, otherwise unnecessary energy loss and increased flow resistance will occur. By setting a suitable length for the contraction section 4210, it can be ensured that the liquid has sufficient distance to complete sufficient acceleration when flowing through the contraction section 4210, effectively improving the liquid's flow rate and impact force.

[0093] In one specific embodiment of this disclosure, on the plane defined by the first axis and the second axis, the angle between the extension line of the wall of the contraction section 4210 and the second axis is 7-13°. Figure 6 The cross-section shown is the plane defined by the first axis and the second axis. The contraction section 4210 appears as a trapezoid in this cross-sectional view, and the wall of the contraction section 4210 is the hypotenuse of this trapezoid. The angle between the extended lines of the wall of the contraction section 4210 (i.e., the angle between the extended lines of the two hypotenuses of the trapezoid) ranges from 15-25° (preferably 21°±1°), meaning the angle between the extended line of the wall of the contraction section 4210 and the second axis is 7-13°. By precisely designing the degree of contraction of the contraction section 4210, the flow velocity change of the liquid within the contraction section 4210 can be optimized, avoiding the impact of excessively rapid or slow contraction on the spraying effect and ensuring that the liquid is ejected with appropriate impact force.

[0094] In one embodiment of this disclosure, reference is made to Figure 3 and Figure 4 The main body 410 also includes a third flow channel 440, whose two ends are connected to the first flow channel 411 and the second flow channel 421, respectively. The third flow channel 440 is constructed with a bend angle. Specifically, the third flow channel 440 can be constructed as an arc shape. Compared to the traditional right-angle connection design, the arc-shaped third flow channel 440 effectively reduces the energy loss caused by right-angle impacts when the liquid turns, reduces flow resistance, and allows the liquid to flow more smoothly within the main body 410. The design of the third flow channel 440 improves the smoothness of the flow channels within the main body 410, reduces turning, impacts, vortices, and other phenomena generated during liquid flow, avoids pressure instability caused by turbulence, and maintains a stable flow velocity and pressure.

[0095] In one specific embodiment of this disclosure, the inner diameter of the liquid outlet channel 8 is equal to the inner diameter of the hollow channel 311, and / or, the inner diameter of the first channel 411 is equal to the inner diameter of the hollow channel 311, and / or, the inner diameter of the third channel 440 is equal to the inner diameter of the first channel 411, and / or, the inner diameter of the end of the second channel 421 away from the spray end 4211 is equal to the inner diameter of the third channel 440. In a preferred embodiment, the inner diameters of the liquid outlet channel 8, the hollow channel 311, the first channel 411, the third channel 440, and the end of the second channel 421 away from the spray end 4211 are all equal, thereby significantly improving the fluid transfer efficiency of the oral cleaning device. The equal inner diameter design avoids turbulence and pressure loss caused by abrupt changes in the channel cross-section, reduces fluid resistance, ensures that the liquid maintains a stable flow state before being delivered from the pump assembly 100 to the constriction section 4210, and minimizes energy loss.

[0096] In one embodiment of this disclosure, such as Figure 4 As shown, the second flow channel 421 also includes an inlet section 422, which is configured to connect the first flow channel 411 to the contraction section 4210. In the direction of the second axis, the inner diameter of the inlet section 422 is configured to remain constant. This ensures that the liquid maintains a uniform and stable flow velocity and pressure before flowing into the contraction section 4210, avoiding turbulence or flow velocity fluctuations caused by sudden changes in inner diameter, and reducing energy loss. The inner diameter of the starting end of the contraction section 4210 is not greater than the inner diameter of the inlet section 422, thus allowing for a smooth transition of the liquid when entering the contraction section 4210.

[0097] In one embodiment of this disclosure, such as Figure 1 As shown, the oral hygiene device also includes a control component 500, which controls the operation of the pump assembly 100 to cause the cleaning element 400 to perform periodic cleaning movements. Specifically, the control component 500 may be a circuit board connected to the pump assembly 100. A preset control program in the control component 500 can control the opening and closing of the pump assembly 100, thereby controlling the water output rhythm and timing of the nozzle 420 of the cleaning element 400. In this embodiment, a point-jet water output mode can be used, wherein the pulse jet impact force of the point-jet water output mode is greater than the stagnation pressure of the continuous jet, thereby achieving a better cleaning effect.

[0098] When a flushing command is received, the control component 500 starts the pump component 100 and cyclically controls the on / off duration of the pump component 100 to achieve point-jet water output. Specifically, the pump component 100 is turned off after running continuously for a first preset time; the pump component 100 is turned on after remaining off for a second preset time; the pump component 100 is turned off after running continuously for a third preset time; the pump component 100 is turned on after remaining off for a fourth preset time; and the above steps are then repeated until cleaning is complete.

[0099] The sum of the first preset time and the third preset time is within the range of 200-230 milliseconds. Both the first and third preset times refer to the time the pump assembly 100 is turned on. Compared with the prior art, in this embodiment, the total time for turning on the pump assembly 100 (the sum of the first and third preset times) is relatively short in each periodic operation, thereby extending the time required to use up the liquid in the storage chamber 220, achieving the effect of saving water and reducing waste. At the same time, the total time for turning on the pump assembly 100 should not be too short; an excessively short injection time will lead to a reduction in impact force, easily resulting in insufficient cleaning power.

[0100] In one specific embodiment of this disclosure, the first preset time is in the range of 80-110 milliseconds, and / or the third preset time is in the range of 100-140 milliseconds. For example, in one specific embodiment, the first preset time is 90ms, the second preset time is 230ms, the third preset time is 140ms, and the fourth preset time is 770ms; in another specific embodiment, the first preset time is 80ms, the second preset time is 230ms, the third preset time is 120ms, and the fourth preset time is 770ms.

[0101] Through testing, the scheme of controlling the opening and closing of the pump assembly 100 using the parameters of this embodiment, compared with the scheme of "first preset time of 100ms, second preset time of 230ms, third preset time of 150ms, and fourth preset time of 770ms", extends the time required to pump 50 ml of water from 68 seconds to 80 seconds, that is, the water dispensing time is increased by 17.6%. It is evident that the control parameters specified in this disclosure have a good water-saving effect, the liquid in the storage chamber 220 is more durable, the frequency of water dispensing by users is reduced, and the user experience is improved.

[0102] In one embodiment of this disclosure, the first preset time is shorter than the third preset time, and / or the second preset time is shorter than the fourth preset time. In one working cycle, the first activation time of the pump assembly 100 is shorter, the second activation time is longer, the first deactivation time of the pump assembly 100 is shorter, and the second deactivation time is longer. This better adapts to the actual application scenario of oral irrigator: users often find it difficult to accurately align the nozzle 420 between their teeth when irrigating; therefore, during the first preset time after the pump assembly 100 is activated, the user can correct the position based on the current rinsing position of the water flow, and fine-tune the alignment position of the nozzle 420 during the second preset time after the pump assembly 100 is deactivated; during the third preset time after the pump assembly 100 is activated, the nozzle 420 can rinse the interdental space for a longer period, thereby achieving a cleaning effect; during the fourth preset time after the pump assembly 100 is deactivated, the user can move the position of the oral cleaning device so that the nozzle 420 is basically aligned with the next interdental space.

[0103] In one embodiment of this disclosure, the sum of the second preset time and the fourth preset time is greater than the sum of the first preset time and the third preset time, meaning the total time the pump assembly 100 is closed is greater than its total time is open. Thus, the user can fully utilize the second and fourth preset times to adjust the position of the nozzle 420, and perform efficient, high-impact, short-duration flushing during the first and third preset times, thereby further improving water-saving efficiency while ensuring the flushing effect.

[0104] In one embodiment of this disclosure, during a second preset time period when the pump assembly 100 is off, the drive component 300 is operated for at least a portion of the time to drive the brush element 430 to vibrate; and / or, during a fourth preset time period when the pump assembly 100 is off, the drive component 300 is operated for at least a portion of the time to drive the brush element 430 to vibrate. This achieves alternating operation of the pump assembly 100 and the drive component 300, thereby enabling alternating oral rinsing and brushing. It utilizes the intermittent time of the point-jet water pattern during oral rinsing, saving users the time required for oral cleaning and improving the user experience.

[0105] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. An oral hygiene device, characterized in that, include: A gripping part (200) extends along a first axis, and the gripping part (200) is provided with a power chamber (210) and a liquid storage chamber (220); the volume of the liquid storage chamber (220) is in the range of 40-60 ml; A pump assembly (100) is disposed in the power chamber (210); the pump assembly (100) includes a housing (1) and a displacement mechanism (2) engaged with the housing (1); a pumping chamber (10) is disposed inside the housing (1), and the housing (1) is provided with an inlet channel (7) and an outlet channel (8) respectively communicating with the pumping chamber (10), the inlet channel (7) being configured to communicate with the storage chamber (220); the liquid in the storage chamber (220) is configured to flow into the pumping chamber (10) through the inlet channel (7), and is configured to flow out through the outlet channel (8) under the action of the displacement mechanism (2); the maximum volume of the pumping chamber (10) is 100-250 mm. 3 Within the range; An output shaft (310) extends along a first axis, and a hollow flow channel (311) extending along the first axis is provided inside the output shaft (310), and the hollow flow channel (311) is configured to communicate with the liquid outlet flow channel (8). A cleaning component (400) is disposed at one end of the grip (200) and includes a nozzle (420) configured to communicate with the hollow flow channel (311); the end of the nozzle (420) away from the grip (200) forms a spray end (4211), and the pump assembly (100) is configured to pump liquid in the reservoir (220) through the hollow flow channel (311) to the spray end (4211); the inner diameter of the spray end (4211) is in the range of 0.5-0.6 mm.

2. The oral hygiene device according to claim 1, characterized in that, The inner diameter of the injection end (4211) is in the range of 0.53-0.57 mm.

3. The oral cleaning device according to claim 1, characterized in that, It also includes a control component (500) that controls the operation of the pump assembly (100) to cause the cleaning component (400) to perform periodic cleaning movements: The control component (500) starts the pump component (100), and shuts down the pump component (100) when the pump component (100) has been running continuously for a first preset time. When the pump assembly (100) remains closed for a second preset time, the pump assembly (100) is turned on. When the pump assembly (100) has been operating continuously for a third preset time, the pump assembly (100) is turned off. When the pump assembly (100) remains closed for a fourth preset time, the pump assembly (100) is turned on. The sum of the first preset time and the third preset time is within the range of 200-230 milliseconds.

4. The oral cleaning device according to claim 3, characterized in that, It also includes a drive unit (300), and the cleaning unit (400) further includes a bristle element (430). During a second preset time period when the pump assembly (100) is closed, the drive unit (300) is controlled to operate for at least a portion of the time to drive the brush element (430) to vibrate; And / or, During a fourth preset time period when the pump assembly (100) is closed, the drive unit (300) is controlled to operate for at least a portion of the time to drive the brush element (430) to vibrate.

5. The oral cleaning device according to claim 3, characterized in that, The first preset time is less than the third preset time, and / or the sum of the second preset time and the fourth preset time is greater than the sum of the first preset time and the third preset time, and / or the second preset time is less than the fourth preset time.

6. The oral cleaning device according to claim 3, characterized in that, The first preset time is in the range of 80-110 milliseconds, and / or the third preset time is in the range of 100-140 milliseconds.

7. The oral cleaning device according to claim 1, characterized in that, The displacement mechanism (2) has a diaphragm (21) on the side facing the first direction, and the diaphragm (21) is configured to enclose and form the pumping cavity (10); the pump assembly (100) also includes an eccentric mechanism (3), which is connected to the displacement mechanism (2) on the side facing the second direction, which is opposite to the first direction; the eccentric mechanism (3) is configured to drive the displacement mechanism (2) to reciprocate along the first direction and the second direction during rotation, so as to cyclically reduce and increase the volume of the pumping cavity (10).

8. The oral cleaning device according to claim 7, characterized in that, The housing (1) includes a valve plate (11), which together with the diaphragm (21) forms the pumping chamber (10). The valve plate (11) is provided with an inlet hole (111) communicating with the inlet channel (7) and an outlet hole (112) communicating with the outlet channel (8). The diameter of the inlet hole (111) is in the range of 1.5-3 mm, and / or the diameter of the outlet hole (112) is in the range of 1.5-3 mm.

9. The oral cleaning device according to claim 8, characterized in that, The diameter of the outlet hole (112) is greater than or equal to the diameter of the inlet hole (111).

10. The oral cleaning device according to claim 8, characterized in that, The displacement mechanism (2) is capable of moving to a first limit position along the first direction and to a second limit position along the second direction; when in the first limit position, at least a portion of the diaphragm (21) is configured to bend toward the first direction, and the wall of the valve plate (11) toward the second direction is configured to adapt to the shape of the diaphragm (21) when it is in the first limit position.

11. The oral hygiene device according to claim 10, characterized in that, When in the second extreme position, at least a portion of the diaphragm (21) is configured to extend 0.5-1 mm toward the second direction.

12. The oral hygiene device according to claim 10, characterized in that, The middle region of the valve plate (11) facing the wall in the second direction is constructed as a plane (113), and the surrounding region is constructed as an arc surface (114).

13. The oral cleaning device according to claim 7, characterized in that, The eccentric mechanism (3) is an eccentric wheel, which is constructed to have a rotation axis that is offset from its geometric center; wherein the eccentricity of the eccentric wheel is in the range of 0.6-1.4 mm.

14. The oral hygiene device according to claim 1, characterized in that, The cleaning component (400) includes a main body (410) and a nozzle (420) disposed on the main body (410); the main body (410) is provided with a first flow channel (411) that communicates with the hollow flow channel (311) and extends at least partially along the first axis; the nozzle (420) is provided with a second flow channel (421) that communicates with the first flow channel (411), the second flow channel (421) being configured to extend along a second axis that intersects the first axis, and the angle between the first axis and the second axis is in the range of 60-120°.

15. The oral cleaning device according to claim 14, characterized in that, The angle between the first axis and the second axis is 90°.

16. The oral hygiene device according to claim 14, characterized in that, The main body (410) is also provided with a third flow channel (440), the two ends of which are respectively connected to the first flow channel (411) and the second flow channel (421), and the third flow channel (440) is constructed to have a bending angle.

17. The oral hygiene device according to claim 16, characterized in that, The inner diameter of the liquid outlet channel (8) is equal to the inner diameter of the hollow channel (311), and / or the inner diameter of the first channel (411) is equal to the inner diameter of the hollow channel (311), and / or the inner diameter of the third channel (440) is equal to the inner diameter of the first channel (411), and / or the inner diameter of the end of the second channel (421) away from the injection end (4211) is equal to the inner diameter of the third channel (440).

18. The oral hygiene device according to claim 14, characterized in that, The main body (410) is provided with a bristle element (430), the bristle element (430) includes a bristle implant (431), the bristle implant (431) is provided with bristles (432), and the bristles (432) are configured to extend along the second axis in a direction away from the bristle implant (431).

19. The oral hygiene device according to claim 18, characterized in that, It also includes a drive (300) that includes the output shaft (310); the drive (300) is configured to drive the brush element (430) to oscillate.

20. The oral hygiene device according to claim 14, characterized in that, The second flow channel (421) includes a contraction section (4210) that surrounds the jet end (4211) at one end away from the first flow channel (411); at least a portion of the inner diameter of the contraction section (4210) is configured to gradually decrease in the direction close to the jet end (4211).

21. The oral hygiene device according to claim 20, characterized in that, The length of the contraction segment (4210) in the direction of the second axis is 1.8-3 mm, and / or, on the plane defined by the first axis and the second axis, the angle between the extension line of the wall of the contraction segment (4210) and the second axis is 7-13°.

22. The oral hygiene device according to claim 20, characterized in that, The second flow channel (421) further includes a liquid inlet section (422), which is configured to connect the first flow channel (411) to the contraction section (4210); in the second axial direction, the inner diameter of the liquid inlet section (422) is configured to remain constant.

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