Oral cleaning device

Abstract

An oral cleaning device includes a grip, a pump assembly, an output shaft, and a cleaning assembly. A power cavity and a liquid storage cavity are formed in the holding part; the pump assembly is arranged in the power cavity; the pump assembly is provided with a liquid inlet flow channel and a liquid outlet flow channel, and the liquid inlet flow channel communicates with the liquid storage cavity. A hollow runner communicated with the liquid outlet runner is arranged in the output shaft; the cleaning assembly comprises a nozzle and a main body part connected to one end of the holding part; a first flow channel which is communicated with the hollow flow channel and extends along a first axis is arranged in the main body part; a second runner is arranged in the nozzle and extends along a second axis; the cleaning assembly is further provided with a third flow channel located between the first flow channel and the second flow channel, and the third flow channel is an arc-shaped bent channel and can receive liquid flowing out of the first flow channel and convert the flowing direction of the liquid flowing out of the first flow channel into the flowing direction of the liquid flowing along the second axis. The pump assembly pumps out liquid in the liquid storage cavity through the hollow flow channel, the first flow channel, the third flow channel and the second flow channel.

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] However, existing products still face significant technical bottlenecks in practical applications. For example, rinsing-flushing oral irrigators are highly complex, resulting in a smaller water tank compared to traditional water flossers, requiring users to refill their tanks multiple times per use. Furthermore, employing a more flow-saving pumping method significantly reduces water pressure, leading to decreased cleaning effectiveness and a poor user experience. Therefore, improving the water pressure of oral hygiene devices is a critical technical challenge that urgently needs to be addressed 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] A gripping part extends along a first axis, and a power chamber and a liquid storage chamber are provided in the gripping part;

[0007] A pump assembly is disposed in the power chamber; the pump assembly is provided with an inlet flow channel and an outlet flow channel, the inlet flow channel being configured to communicate with the storage chamber.

[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; the cleaning component includes a nozzle and a main body portion connected to one end of the grip portion; the main body portion is provided with a first flow channel communicating with the hollow flow channel and extending at least partially along the first axis; the nozzle is provided with 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;

[0010] The cleaning component further includes a third flow channel positioned between the first and second flow channels. The opposite ends of the third flow channel are connected to the first and second flow channels, respectively. The third flow channel is constructed as an arc-shaped bend and is capable of receiving liquid flowing out of the first flow channel and converting the flow direction of the liquid flowing out of the first flow channel to flow along the second axis. The pump assembly is configured to pump the liquid in the storage chamber out through the hollow flow channel, the first flow channel, the third flow channel, and the second flow channel.

[0011] In one embodiment of this disclosure, the inner diameter of the third flow channel is configured to remain constant.

[0012] In one embodiment of this disclosure, the water flow turning angle of the third flow channel is configured to be within the range of 60° to 120°.

[0013] In one embodiment of this disclosure, the water flow turning angle of the third flow channel is configured to be within the range of 80° to 100°.

[0014] 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 near the third channel is equal to the inner diameter of the third channel.

[0015] In one embodiment of this disclosure, the cleaning assembly further includes a contact engaged with the body portion, and the nozzle is coupled to the contact.

[0016] In one embodiment of this disclosure, the nozzle is provided with a mounting groove, which is configured to be located at one end of the second flow channel near the third flow channel; the main body is provided with a protrusion adapted to the mounting groove, the protrusion being configured to at least partially protrude from the end face of the main body that engages with the contact member, and is embedded in the mounting groove; the protrusion surrounds to form a transition flow channel, the transition flow channel being streamlined to connect the third flow channel to the second flow channel.

[0017] In one embodiment of this disclosure, the inner diameter of the transition channel is equal to the inner diameter of the third channel, and / or the inner diameter of the second channel at the junction with the third channel is equal, and / or the inner diameter of the transition channel gradually changes along the second axis from being the same as the inner diameter of the third channel to being the same as the inner diameter of the second channel.

[0018] In one embodiment of this disclosure, the mounting groove is configured as a stepped groove, and the outer wall of the protrusion is configured as a stepped wall surface adapted to the mounting groove.

[0019] In one embodiment of this disclosure, a drive member is further included, the drive member including the output shaft; the drive member is configured to drive the main body portion to move the contact member relative to the grip portion.

[0020] In one embodiment of this disclosure, the contact member includes a bristle implant and bristles disposed on the bristle implant extending away from the bristle implant along the second axis.

[0021] In one embodiment of this disclosure, the nozzle is configured to be integrally formed with the tufting component.

[0022] In one embodiment of this disclosure, the second flow channel includes a contraction section, the end of which, away from the first flow channel, encloses a jetting end; the end of the second flow channel away from the jetting end is connected to the third flow channel.

[0023] In one embodiment of this disclosure, the inner diameter of the injection end is 0.5-0.6 mm, and / or the extension length of the injection end along the second axis is 0.5-0.65 mm, and / or the inner diameter of the input end of the contraction section is 1.3-1.5 mm, and / or the inner diameter of the input end of the contraction section is less than or equal to the inner diameter of the third flow channel.

[0024] In one embodiment of this disclosure, the inner diameter of the injection end is the same as the minimum inner diameter of the contraction section, or the inner diameter of the injection end is configured to gradually increase in a direction away from the contraction section.

[0025] In one embodiment of this disclosure, on the plane defined by the first axis and the second axis, the angle between the extended line of the wall of the contraction section and the second axis is 7-13°.

[0026] In one embodiment of this disclosure, the length of the contraction segment in the direction of the second axis is 1.8-3 mm.

[0027] In one embodiment of this disclosure, the length of the contraction segment in the direction of the second axis is 2-2.5 mm.

[0028] In one embodiment of this disclosure, the first flow channel includes a first connecting section adjacent to the third flow channel, the inner diameter of the first connecting section being configured to gradually decrease in the flow direction; and / or, the third flow channel includes a second connecting section adjacent to the second flow channel, the inner diameter of the second connecting section being configured to gradually decrease in the flow direction.

[0029] In one embodiment of this disclosure, the second flow channel further includes an inlet section configured to connect the third flow channel to the contraction section; in the direction of the second axis, the inner diameter of the inlet section is configured to remain constant, and / or, the inner diameter of the starting end of the contraction section is not greater than the inner diameter of the inlet section.

[0030] In one embodiment of this disclosure, the ratio of the length of the incoming liquid section to the length of the contraction section in the second axial direction ranges from 0.7 to 1.3.

[0031] In one embodiment of this disclosure, the nozzle and the body are configured to be integrally formed so that the flow channels inside the cleaning assembly are integrally formed.

[0032] In one embodiment of this disclosure, the pump assembly includes a housing and a displacement mechanism movably connected to the housing; the housing is provided with a pumping chamber, which is connected to the inlet channel and the outlet channel respectively; liquid from the inlet channel is configured to flow into the pumping chamber and is configured to flow out through the outlet channel under the squeezing action of the displacement mechanism.

[0033] In one embodiment of this disclosure, the maximum volume of the pumping chamber is 100-250 mm. 3 Within the range.

[0034] In one embodiment of this disclosure, the pump assembly further includes a drive mechanism and an eccentric wheel. The eccentric wheel is configured to rotate under the action of the drive mechanism and drive the displacement mechanism to reciprocate during rotation, thereby cyclically decreasing and increasing the volume of the pumping chamber. The eccentric wheel is configured to have a rotation axis offset from its geometric center. The eccentricity of the eccentric wheel is in the range of 0.5-1.2 mm.

[0035] One beneficial effect of this disclosure is that by setting a third flow channel with an arc-shaped bend between the first and second flow channels, and enabling the third flow channel to receive the liquid flowing out of the first flow channel and convert the flow direction of the liquid flowing out of the first flow channel to flow along the second axis, flow resistance is reduced and the outflow impact force is improved. Compared with the traditional right-angle connection design, the arc-shaped third flow channel effectively reduces the energy loss caused by the right-angle impact when the liquid turns, allowing the liquid to flow more smoothly within the cleaning component, thereby maintaining a high flow velocity and impact force during liquid outflow. The design of the third flow channel improves the smoothness of the flow channel, reduces turning, impact, vortex and other phenomena generated during liquid flow, avoids pressure instability caused by turbulence, and maintains a stable flow velocity and pressure of the liquid.

[0036] 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

[0037] 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.

[0038] Figure 1 This is a schematic diagram of the structure of an oral cleaning device provided in an embodiment of the present disclosure;

[0039] Figure 2 This is a cross-sectional view of a driving component and cleaning assembly provided in an embodiment of this disclosure;

[0040] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0041] Figure 4 This is a partial cross-sectional view of a cleaning assembly provided in an embodiment of this disclosure, where the second flow channel includes an incoming liquid section;

[0042] Figure 5 This is a partial cross-sectional view of a nozzle provided in one embodiment of this disclosure;

[0043] Figure 6 yes Figure 5 The diagram shows the dimensions of the structure.

[0044] Figure 7 This is an exploded view of a cleaning component provided in an embodiment of this disclosure;

[0045] Figure 8 yes Figure 7 Enlarged view of part B in the image;

[0046] Figure 9 This is a cross-sectional view of a pump assembly provided in an embodiment of this disclosure;

[0047] Figure 10 This is a cross-sectional view of an oral cleaning device provided in an embodiment of this disclosure.

[0048] Figures 1 to 10 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0049] 100. Pump assembly; 1. Housing; 10. Pumping chamber; 11. Valve plate; 2. Displacement mechanism; 3. Eccentric wheel; 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; 412. Protrusion; 413. Transition channel; 420. Nozzle; 421. Second channel; 4210. Contraction section; 4211. Spray end; 4212. Input end; 422. Inlet section; 423. Mounting groove; 430. Contact component; 431. Bristle component; 432. Bristles; 440. Third channel. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] refer to Figure 1 , Figure 2 , Figure 9 and Figure 10 The oral cleaning device disclosed herein includes: a grip 200, a pump assembly 100, an output shaft 310, and a cleaning assembly 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.

[0060] The grip portion 200 may be hollow inside, 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; or, 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.

[0061] The cleaning component 400 is disposed at one end of the grip portion 200. The cleaning component 400 can be a device capable of cleaning the oral cavity, such as a toothbrush head, a rinsing head, or a combined rinsing and brushing head. 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 combined rinsing and brushing device, the cleaning component 400 can be a combined rinsing and brushing head.

[0062] In one embodiment of this disclosure, such as Figure 2 and Figure 3As shown, taking the cleaning component 400 as an example of a flushing head: the cleaning component 400 includes a nozzle 420, a main body 410 connected to one end of the grip 200, and a contact member 430 engaged with the main body 410. The nozzle 420 is mainly used to achieve the flushing function, and the contact member 430 is mainly used to achieve the toothbrush function. (Reference) Figure 3 and Figure 7 The contact element 430 includes a bristle attachment 431 and bristles 432 disposed on the bristle attachment 431 and extending away from the bristle attachment 431 along a second axis, the second axis intersecting the first axis. Figure 3 The direction shown by the Y-axis is the extension direction of the second axis.

[0063] 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.

[0064] 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.

[0065] In one embodiment of this disclosure, the nozzle 420 is configured to be coupled to the contact member 430, and the contact member 430 is configured to be joined to the main body 410. Specifically, the nozzle 420 can be coupled to the contact member 430 by means of laser welding or the like, or it can be integrally formed with the contact member 430. In a specific embodiment of this disclosure, refer to... Figure 8 The nozzle 420 is integrally formed with the bristle attachment 431. The coupling process of the nozzle 420 must ensure a smooth transition and connection of the water channels inside the cleaning assembly 400, thereby minimizing flow resistance and increasing the water flow speed and impact force. The contact 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 contact 430, preventing the bristles 432 from falling off after a period of use, and extending the service life of the oral cleaning equipment.

[0066] refer to Figure 2 and Figure 10In the case where the cleaning component 400 is an integrated rinsing head, the oral cleaning device also includes a drive unit 300. The drive unit 300 includes an output shaft 310 and is configured to drive the main body 410 to move the contact member 430 relative to the gripping part 200. For example, the output shaft 310 can reciprocate, thereby causing the contact member 430 to oscillate or vibrate. This drive unit 300 and the pump assembly 100 can be jointly disposed in the power chamber 210, as shown in the reference. Figure 10 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 through the top of the grip portion 200 and connect to the cleaning assembly 400 to drive the cleaning assembly 400.

[0067] The drive unit 300 may be a rotary motor capable of rotating the cleaning component 400, or it may 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 may pass through the motor body axially. The axial tip of the output shaft 310 may extend beyond the tip of the motor body and connect to the cleaning component 400. The drive unit 300 is configured to drive the contact member 430 to oscillate, thereby achieving the effect of automatic brushing.

[0068] 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 it may not have functions such as rotation or vibration.

[0069] refer to Figure 1 and Figure 9 The pump assembly 100 is disposed in the power chamber 210. The pump assembly 100 includes a housing 1 and a displacement mechanism 2 movably connected to 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 installed on the housing 1.

[0070] like Figure 9 As shown, the side of the displacement mechanism 2 facing the first direction S1 and the valve plate 11 encloses to form a pumping chamber 10. The volume of the pumping chamber 10 can change during the movement of the displacement mechanism 2, thereby allowing the liquid in the pumping chamber 10 to be pumped out under the squeezing action of the displacement mechanism 2. The valve plate 11 can be provided with an inlet hole and an outlet hole respectively connecting the inlet channel 7 and the outlet channel 8. Liquid from the inlet channel 7 can enter the pumping chamber 10 through the inlet hole. When the displacement mechanism 2 moves, the volume of the pumping chamber 10 changes, thereby causing the pressure inside the pumping chamber 10 to change. In this way, the pressure can be used to pump the liquid out through the outlet hole from the outlet channel 8.

[0071] Furthermore, the pump assembly 100 also includes a drive mechanism 4 and an eccentric wheel 3. The eccentric wheel 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. The eccentric wheel 3 is configured to have a rotation axis offset from its geometric center. Figure 7 As shown, the eccentric wheel 3 is disposed inside the housing 1 and is drivenly 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 drivenly connected to the eccentric wheel 3, thereby driving the eccentric wheel 3 to rotate. The drive mechanism 4 includes a drive shaft 41. The eccentric wheel 3 may be provided with a shaft hole offset from its geometric center. The rotation center line of the eccentric wheel 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 wheel 3 to rotate. During the rotation, the eccentric wheel 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.

[0072] In one embodiment of this disclosure, the eccentricity of the eccentric wheel 3 is in the range of 0.5-1.2 mm. More preferably, the eccentricity of the eccentric wheel 3 is in the range of 0.8-1.2 mm. The eccentricity of the eccentric wheel 3 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 3 drive scheme with a larger eccentricity in the prior art, this disclosure limits the eccentricity of the eccentric wheel 3 to 0.5-1.2 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 3 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.

[0073] When the displacement mechanism 2 moves to its limit position in the second direction S2, the pumping chamber 10 has its maximum volume. In one embodiment of this disclosure, the maximum volume of the pumping chamber 10 is 100-250 mm. 3 Within the range of [specific parameters]. The volume of the pumping chamber 10 disclosed herein 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. In addition, as mentioned above, this disclosure also reduces the eccentricity of the eccentric wheel 3, thereby reducing the magnitude of the volume change of the pumping chamber 10, thus allowing the volume of the pumping chamber 10 to be adaptively reduced, thereby improving the throttling and water-saving effect.

[0074] refer to Figure 2 and Figure 3 The output shaft 310 has a hollow flow channel 311 extending along a first axis, which is configured to communicate with the liquid outlet channel 8. The main body 410 of the cleaning assembly 400 has a first flow channel 411 communicating with the hollow flow channel 311 and extending at least partially along the first axis; the nozzle 420 has a second flow channel 421 communicating with the first flow channel 411, which is configured to extend along a second axis. When the oral cleaning device performs its rinsing function, the pump assembly 100 guides 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 out through the first flow channel 411 in the main body 410 and the second flow channel 421 in the nozzle 420.

[0075] like Figure 3 As shown, the cleaning assembly 400 also has a third flow channel 440 positioned between the first flow channel 411 and the second flow channel 421. The opposite ends of the third flow channel 440 are connected to the first flow channel 411 and the second flow channel 421, respectively. The third flow channel 440 is constructed as an arc-shaped bend and is capable of receiving liquid flowing out of the first flow channel 411 and converting the flow direction of the liquid flowing out of the first flow channel 411 to flow along the second axis. The pump assembly 100 is configured to pump liquid in the liquid storage chamber 220 through the hollow flow channel 311, the first flow channel 411, the third flow channel 440, and the second flow channel 421.

[0076] The present disclosure provides a third flow channel 440 with an arc-shaped bend configuration between the first flow channel 411 and the second flow channel 421, enabling the third flow channel 440 to receive the liquid flowing out of the first flow channel 411 and convert the flow direction of the liquid flowing out of the first flow channel 411 to flow along the second axis. This reduces the flow resistance and enhances the water outlet impact force. Compared with the traditional right-angle connection design, the arc-shaped third flow channel 440 effectively reduces the energy loss caused by right-angle impact during liquid turning, allowing the liquid to flow more smoothly within the cleaning component 400. Consequently, a relatively high flow rate and impact force can be maintained during liquid discharge. The design of the third flow channel 440 improves the flow channel smoothness, reduces situations such as turning, impact, and vortex generated during liquid flow, avoids pressure instability caused by turbulence, and maintains a stable flow rate and pressure of the liquid.

[0077] In a specific embodiment of the present disclosure, the water flow turning angle of the third flow channel 440 is configured to be within the range of 60° to 120°. Preferably, the water flow turning angle of the third flow channel 440 is configured to be within the range of 80° to 100°. The water flow turning angle of the third flow channel 440 can be consistent with the angle between the first axis and the second axis. For example, when the angle between the first axis and the second axis is 90°, the water flow turning angle of the third flow channel 440 can also be configured to be 90°. This enables the two ends of the third flow channel 440 to be respectively consistent with the extension directions of the first flow channel 411 and the second flow channel 421, thereby reducing the energy loss caused during the process of converting the flow direction.

[0078] In an embodiment of the present disclosure, the inner diameter of the third flow channel 440 is configured to remain unchanged. This avoids turbulence and pressure loss caused by sudden changes in the cross-section of the third flow channel 440, reduces the fluid resistance, ensures that the liquid maintains a stable flow state within the third flow channel 440, and minimizes energy loss.

[0079] In an embodiment of the present disclosure, the inner diameter of the liquid outlet flow channel 8 is equal to the inner diameter of the hollow flow channel 311, and / or the inner diameter of the first flow channel 411 is equal to the inner diameter of the hollow flow channel 311, and / or the inner diameter of the third flow channel 440 is equal to the inner diameter of the first flow channel 411, and / or the inner diameter of the end of the second flow channel 421 close to the third flow channel 440 is equal to the inner diameter of the third flow channel 440. In a preferred embodiment, the inner diameters of the liquid outlet flow channel 8, the hollow flow channel 311, the first flow channel 411, the third flow channel 440, and the end of the second flow channel 421 close to the third flow channel 440 are all equal. This can significantly improve the fluid transmission efficiency of the oral cleaning device. The equal inner diameter design avoids turbulence and pressure loss caused by sudden changes in the flow channel cross-section, reduces the fluid resistance, ensures that the liquid maintains a stable flow state, and minimizes energy loss.

[0080] In an embodiment of the present disclosure, refer to Figure 8 The nozzle 420 has a mounting groove 423, which is configured to be located at one end of the second flow channel 421 near the third flow channel 440. The main body 410 has a protrusion 412 adapted to the mounting groove 423. The protrusion 412 is configured to at least partially protrude from the end face of the contact member 430 of the main body 410 and is embedded in the mounting groove 423. The protrusion 412 encloses and forms a transition flow channel 413, which streamlines and connects the third flow channel 440 to the second flow channel 421. Specifically, the mounting groove 423 can be configured as a stepped groove, and the outer wall of the protrusion 412 can be configured as a stepped wall surface adapted to the mounting groove 423. This disclosure achieves a tight fit between the nozzle 420 and the main body 410 by providing mutually adapted mounting grooves 423 and protrusions 412, ensuring gapless assembly and effectively preventing liquid leakage. Meanwhile, the streamlined transition channel 413 formed by the protrusion 412 connects the third channel 440 and the second channel 421. This smooth connection design can greatly reduce the flow resistance of the liquid at the interface of the channels, reduce energy loss, and improve the liquid discharge impact force.

[0081] In one specific embodiment of this disclosure, the inner diameter of the transition channel 413 is equal to the inner diameter of the third channel 440, and / or, the inner diameter of the second channel 421 at the junction with the third channel 440 is equal. In a preferred embodiment, the inner diameters of the third channel 440, the transition channel 413, and the end of the second channel 421 closest to the third channel 440 are all equal, thereby avoiding turbulence and pressure loss caused by abrupt changes in the channel cross-section, reducing fluid resistance, ensuring that the liquid maintains a stable flow state during the flow from the third channel 440 into the second channel 421, and minimizing energy loss.

[0082] In another specific embodiment of this disclosure, the inner diameter of the transition channel 413 gradually changes along the second axis from being the same as the inner diameter of the third channel 440 to being the same as the inner diameter of the second channel 421. This gradual design can effectively avoid eddies and turbulence caused by abrupt changes in the inner diameter of the channel. Through a smooth transition in the inner diameter, the liquid can achieve a more stable and uniform flow velocity change, greatly reducing flow resistance.

[0083] In one embodiment of this disclosure, reference is made to Figures 3 to 5The second flow channel 421 includes a constriction section 4210. The end of the constriction section 4210 furthest from the first flow channel 411 forms a jet end 4211. The end of the second flow channel 421 furthest from the jet end 4211 connects to the third flow channel 440. At least a portion of the inner diameter of the constriction section 4210 gradually decreases towards the jet end 4211, thus forming a Venturi tube structure. When the pump assembly 100 pumps liquid through the constriction section 4210, the flow channel cross-section contracts due to the gradually decreasing inner diameter. According to fluid mechanics principles, the fluid velocity increases as the cross-sectional area of ​​the flow channel decreases, 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 ensured, effectively removing plaque and food residue from teeth and between teeth, improving cleaning performance.

[0084] In one specific embodiment of this disclosure, reference is made to Figure 6 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.

[0085] 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.

[0086] In one specific embodiment of this disclosure, the inner diameter of the injection end 4211 is 0.5-0.6 mm, and / or the extension length of the injection end 4211 along the second axis is 0.5-0.65 mm. This disclosure reasonably limits the inner diameter and extension length of the injection end 4211. Specifically, compared to the prior art, the inner diameter of the injection end 4211 in this disclosure is smaller, thereby increasing the flow velocity and enhancing the liquid jet impact force. Simultaneously, the 0.5-0.65 mm extension length of the injection end 421 along the second axis ensures that the liquid maintains a stable flow state within the second flow channel 421 before jetting, avoiding jet turbulence and optimizing the spraying effect.

[0087] In one specific embodiment of this disclosure, the inner diameter of the inlet end 4212 of the contraction section 4210 is 1.3-1.5 mm, and / or the inner diameter of the inlet end 4212 of the contraction section 4210 is less than or equal to the inner diameter of the third flow channel 440. This allows the liquid to smoothly transition from the third flow channel 440 to the contraction section 4210, avoiding fluid turbulence and energy loss caused by abrupt changes in the inner diameter of the flow channel, and ensuring the continuity and stability of the liquid flow. The inner diameter of the inlet end 4212 is limited to a relatively small 1.3-1.5 mm, thereby maintaining a certain pressure before the liquid enters the contraction section 4210. Combined with the gradually decreasing inner diameter of the contraction section 4210, this promotes a high-efficiency increase in liquid velocity within the contraction section 4210, thereby enhancing the outflow impact force of the jet end 4211.

[0088] In one embodiment of this disclosure, such as Figure 5 As shown, the inner diameter of the jet end 4211 is the same as the minimum inner diameter of the contraction section 4210. It can be understood that the end of the contraction section 4210 closest to the jet end 4211 has its minimum inner diameter. The liquid flowing out of the contraction section 4210 can continue to flow in the flow channel of the jet end 4211 where the inner diameter no longer changes, thus achieving a smooth transition. The liquid can maintain its flow velocity in the jet end 4211 and be ejected with a suitable impact force.

[0089] In another embodiment of this disclosure, the inner diameter of the jet end 4211 is configured to gradually increase in the direction away from the constriction section 4210. This causes the liquid to accelerate after passing through the constriction section 4210 and form a diffused water flow within the gradually expanding jet end 4211 channel, thereby expanding the rinsing area. The water flow can cover more tooth surfaces and interdental areas, reducing blind spots and improving cleaning efficiency.

[0090] In one embodiment of this disclosure, the first flow channel 411 includes a first connecting section adjacent to the third flow channel 440, the inner diameter of which is configured to gradually decrease in the liquid flow direction; and / or, the third flow channel 440 includes a second connecting section adjacent to the second flow channel 421, the inner diameter of which is configured to gradually decrease in the liquid flow direction. As the liquid flows from the first flow channel 411 to the third flow channel 440, it can naturally accelerate due to the gradual decrease in the inner diameter of the first connecting section; and / or, as the liquid flows from the third flow channel 440 to the second flow channel 421, it can naturally accelerate due to the gradual decrease in the inner diameter of the second connecting section. This further increases the liquid flow rate, allowing the liquid to accelerate in advance before entering the contraction section 4210 of the second flow channel 421, thereby further enhancing the outflow impact force of the jet end 4211.

[0091] In one embodiment of this disclosure, such as Figure 3 As shown, the contraction section 4210 can be directly connected to the third flow channel 440. In another embodiment of this disclosure, as... Figure 4 As shown, the second flow channel 421 also includes an inlet section 422, which is configured to connect the third flow channel 440 to the contraction section 4210. Specifically, in the second axial direction, the inner diameter of the inlet section 422 is configured to remain constant, and / or, the inner diameter of the starting end of the contraction section 4210 is not greater than the inner diameter of the inlet section 422, and / or, in the second axial direction, the ratio of the length of the inlet section 422 to the length of the contraction section 4210 ranges from 0.7 to 1.3.

[0092] Specifically, in the direction of the second axis, when the length of the nozzle 420 is substantially the same as that of the contraction section 4210, the contraction section 4210 can be directly connected to the third flow channel 440; when the length of the nozzle 420 is greater than that of the contraction section 4210, a liquid inlet section 422 structure can be provided, which forms a conveying channel for the liquid to flow from the third flow channel 440 to the contraction section 4210. When the liquid inlet section 422 is provided, its inner diameter preferably remains unchanged, thereby ensuring 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 liquid inlet section 422, so that the liquid can smoothly transition when entering the contraction section 4210.

[0093] In one embodiment of this disclosure, the nozzle 420 and the main body 410 are integrally formed, so that the flow channels inside the cleaning assembly 400 are integrally formed. This enhances structural stability, and the integral forming avoids gaps caused by assembly in traditional split structures, effectively preventing liquid leakage, enhancing sealing, and extending the equipment's service life. Furthermore, the integral forming process simplifies the assembly process, improves production efficiency, and, more importantly, makes the flow channel surface smoother and flatter, reducing liquid flow resistance and enhancing the water flow rate, impact force, and other performance characteristics of the oral cleaning equipment, thus improving the user experience.

[0094] 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: The gripping part (200) extends along the first axis, and the gripping part (200) is provided with a power chamber (210) and a liquid storage chamber (220). A pump assembly (100) is disposed in the power chamber (210); the pump assembly (100) is provided with an inlet flow channel (7) and an outlet flow channel (8), and the inlet flow channel (7) is configured to communicate with the storage chamber (220). 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 portion (200); the cleaning component (400) includes a nozzle (420) and a main body portion (410) connected to one end of the grip portion (200); the main body portion (410) is provided with a first flow channel (411) communicating with the hollow flow channel (311) and extending at least partially along the first axis; the nozzle (420) is provided with a second flow channel (421) communicating with the first flow channel (411), the second flow channel (421) being configured to extend along a second axis, the second axis intersecting the first axis; The cleaning component (400) further includes a third flow channel (440) positioned between the first flow channel (411) and the second flow channel (421). The opposite ends of the third flow channel (440) are connected to the first flow channel (411) and the second flow channel (421), respectively. The third flow channel (440) is constructed as an arc-shaped bend and is capable of receiving the liquid flowing out of the first flow channel (411) and converting the flow direction of the liquid flowing out of the first flow channel (411) to flow along the second axis. The pump assembly (100) is configured to pump the liquid in the storage chamber (220) through the hollow flow channel (311), the first flow channel (411), the third flow channel (440), and the second flow channel (421).

2. The oral hygiene device according to claim 1, characterized in that, The inner diameter of the third flow channel (440) is configured to remain constant.

3. The oral cleaning device according to claim 1, characterized in that, The water flow turning angle of the third channel (440) is configured to be within the range of 60° to 120°.

4. The oral cleaning device according to claim 3, characterized in that, The water flow turning angle of the third channel (440) is configured to be within the range of 80° to 100°.

5. The oral cleaning device according to claim 1, 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) near the third channel (440) is equal to the inner diameter of the third channel (440).

6. The oral cleaning device according to claim 1, characterized in that, The cleaning assembly (400) also includes a contact (430) engaged with the body portion (410), and the nozzle (420) is coupled to the contact (430).

7. The oral cleaning device according to claim 6, characterized in that, The nozzle (420) is provided with a mounting groove (423), which is configured to be located at one end of the second flow channel (421) near the third flow channel (440); the main body (410) is provided with a protrusion (412) adapted to the mounting groove (423), which is configured to at least partially protrude from the end face of the main body (410) that engages with the contact member (430) and is embedded in the mounting groove (423); the protrusion (412) surrounds to form a transition flow channel (413), which is streamlined to connect the third flow channel (440) to the second flow channel (421).

8. The oral cleaning device according to claim 7, characterized in that, The inner diameter of the transition channel (413) is equal to the inner diameter of the third channel (440), and / or the inner diameter of the second channel (421) at the connection with the third channel (440) is equal, and / or the inner diameter of the transition channel (413) gradually changes along the second axis from being the same as the inner diameter of the third channel (440) to being the same as the inner diameter of the second channel (421).

9. The oral cleaning device according to claim 7, characterized in that, The mounting groove (423) is configured as a stepped groove, and the outer wall of the protrusion (412) is configured as a stepped wall surface adapted to the mounting groove (423).

10. The oral cleaning device according to claim 6, characterized in that, It also includes a drive member (300) that includes the output shaft (310); the drive member (300) is configured to drive the main body (410) to move the contact member (430) relative to the gripping part (200).

11. The oral cleaning device according to claim 6, characterized in that, The contact member (430) includes a bristle implant (431) and bristles (432) disposed on the bristle implant (431) extending along the second axis in a direction away from the bristle implant (431).

12. The oral hygiene device according to claim 11, characterized in that, The nozzle (420) is configured to be integrally formed with the tufting component (431).

13. The oral hygiene device according to claim 1, characterized in that, The second flow channel (421) includes a contraction section (4210), the end of which is away from the first flow channel (411) and forms a jet end (4211); the end of the second flow channel (421) away from the jet end (4211) is connected to the third flow channel (440).

14. The oral cleaning device according to claim 13, characterized in that, The inner diameter of the injection end (4211) is 0.5-0.6 mm, and / or the extension length of the injection end (4211) along the second axis is 0.5-0.65 mm, and / or the inner diameter of the input end (4212) of the contraction section (4210) is 1.3-1.5 mm, and / or the inner diameter of the input end (4212) of the contraction section (4210) is less than or equal to the inner diameter of the third flow channel (440).

15. The oral cleaning device according to claim 14, characterized in that, The inner diameter of the injection end (4211) is the same as the minimum inner diameter of the contraction section (4210), or the inner diameter of the injection end (4211) is configured to gradually increase in a direction away from the contraction section (4210).

16. The oral hygiene device according to claim 13, characterized in that, 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°.

17. The oral cleaning device according to claim 13, characterized in that, The length of the contraction section (4210) in the direction of the second axis is 1.8-3 mm.

18. The oral hygiene device according to claim 17, characterized in that, The length of the contraction section (4210) in the direction of the second axis is 2-2.5 mm.

19. The oral hygiene device according to claim 13, characterized in that, The first flow channel (411) includes a first connecting section near the third flow channel (440), the inner diameter of the first connecting section being configured to gradually decrease in the flow direction; and / or, the third flow channel (440) includes a second connecting section near the second flow channel (421), the inner diameter of the second connecting section being configured to gradually decrease in the flow direction.

20. The oral hygiene device according to claim 13, characterized in that, The second flow channel (421) further includes an inlet section (422), which is configured to connect the third flow channel (440) 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, and / or, the inner diameter of the starting end of the contraction section (4210) is not greater than the inner diameter of the inlet section (422).

21. The oral hygiene device according to claim 20, characterized in that, In the direction of the second axis, the ratio of the length of the liquid inlet section (422) to the length of the contraction section (4210) ranges from 0.7 to 1.

3.

22. The oral hygiene device according to claim 1, characterized in that, The nozzle (420) and the main body (410) are constructed as an integral part so that the flow channels inside the cleaning assembly (400) are integrally formed.

23. The oral hygiene device according to any one of claims 1-22, characterized in that, The pump assembly (100) includes a housing (1) and a displacement mechanism (2) movably connected to the housing (1); a pumping chamber (10) is provided inside the housing (1), and the pumping chamber (10) is connected to the inlet channel (7) and the outlet channel (8) respectively; liquid from the inlet channel (7) is configured to flow into the pumping chamber (10) and is configured to flow out through the outlet channel (8) under the action of the displacement mechanism (2).

24. The oral hygiene device according to claim 23, characterized in that, The maximum volume of the pumping chamber (10) is 100-250 mm. 3 Within the range.

25. The oral hygiene device according to claim 23, characterized in that, The pump assembly (100) further includes a drive mechanism (4) and an eccentric wheel (3). The eccentric wheel (3) is configured to rotate under the action of the drive mechanism (4) and drive the displacement mechanism (2) to reciprocate during the rotation, so as to cyclically reduce and increase the volume of the pumping chamber (10). The eccentric wheel (3) is configured to have a rotation axis that is off-center from its geometric center. The eccentricity of the eccentric wheel (3) is in the range of 0.5-1.2 mm.

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