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 flow channel extending along the first axis is arranged in the output shaft, and the hollow flow channel communicates with the liquid outlet flow channel; the cleaning assembly is arranged at the end part of the holding part; the cleaning assembly comprises a main body part connected to the holding part, and a nozzle and a contact piece are arranged on the main body part; a first runner which is communicated with the hollow runner and at least partially extends along a first axis is arranged in the main body part; a second runner communicated with the first runner is arranged in the nozzle, and the second runner extends along a second axis; the second flow channel comprises a contraction section, and the end, away from the first flow channel, of the contraction section defines a spraying end. At least part of the inner diameter of the contraction section is gradually reduced in the direction close to the spraying end.

Description

Oral cleaning equipment 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. Summary of the Invention

[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 main body connected to the grip portion, and a nozzle and a contact element are disposed on the main body; a first flow channel is disposed within the main body, communicating with the hollow flow channel and extending at least partially along the first axis; a second flow channel is disposed within the nozzle, 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 second flow channel includes a constriction section, the end of which, away from the first flow channel, encloses to form a jet end; the pump assembly is configured to pump liquid in the outlet flow channel through the hollow flow channel, the first flow channel, and the second flow channel to the jet end; at least a portion of the inner diameter of the constriction section is configured to gradually decrease in the direction close to the jet end.

[0011] In one embodiment of this disclosure, the inner diameter of the spray end is 0.5-0.6 mm, and / or the extension length of the spray end along the second axis is 0.5-0.65 mm.

[0012] In one embodiment of this disclosure, 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 first flow channel.

[0013] 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.

[0014] In one embodiment of this disclosure, the first flow channel includes a first connecting section adjacent to the second flow channel, wherein the inner diameter of the first connecting section is configured to gradually decrease in the flow direction.

[0015] In one embodiment of this disclosure, the length of the contraction segment in the direction of the second axis is 1.8-3 mm.

[0016] In one embodiment of this disclosure, the length of the contraction segment in the direction of the second axis is 2-2.5 mm.

[0017] 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 segment and the second axis is 7-13°.

[0018] In one embodiment of this disclosure, the inner diameter of the end of the second flow channel away from the injection end is equal to the inner diameter of the first flow channel.

[0019] In one embodiment of this disclosure, the inner diameter of the first flow channel is equal to the inner diameter of the hollow flow channel.

[0020] In one embodiment of this disclosure, the output shaft is configured to extend into the main body to communicate with the first flow channel and to be aligned with each other on the first axis.

[0021] In one embodiment of this disclosure, the inner diameter of the outlet flow channel of the pump assembly is equal to the inner diameter of the hollow flow channel.

[0022] In one embodiment of this disclosure, the cleaning component is further provided with a third flow channel, the opposite ends of which are respectively connected to the first flow channel and the second flow channel, and the third flow channel is configured to have a bending angle.

[0023] In one embodiment of this disclosure, the first flow channel is configured to extend entirely along the first axis.

[0024] In one embodiment of this disclosure, the third flow channel includes a second connecting section adjacent to the second flow channel, wherein the inner diameter of the second connecting section is configured to gradually decrease in the flow direction.

[0025] In one embodiment of this disclosure, the contraction section is configured to communicate with the third flow channel; or, the second flow channel further includes an inlet section configured to communicate with the third flow channel to the contraction section.

[0026] In one embodiment of this disclosure, the inner diameter of the inlet section is configured to remain constant in the second axial direction, and / or the inner diameter of the starting end of the contraction section is not greater than the inner diameter of the inlet section.

[0027] In one embodiment of this disclosure, when the second flow channel includes an inlet section, the ratio of the length of the inlet section to the length of the contraction section in the second axial direction ranges from 0.7 to 1.3.

[0028] In one embodiment of this disclosure, the inner diameter of the third flow channel is equal to the inner diameter of the first flow channel and equal to the inner diameter of the end of the second flow channel away from the injection end; the inner diameter of the third flow channel is configured to remain constant.

[0029] 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.

[0030] In one embodiment of this disclosure, the nozzle is configured to be coupled to the contact member, which is configured to engage the body portion.

[0031] In one embodiment of this disclosure, the contact member includes a bristle member having bristles configured to extend along the second axis in a direction away from the bristle member.

[0032] In one embodiment of this disclosure, the angle between the first axis and the second axis is in the range of 60-120°.

[0033] In one embodiment of this disclosure, the angle between the first axis and the second axis is 90°.

[0034] In one embodiment of this disclosure, the pump assembly includes a housing and a displacement mechanism engaged with the housing; a pumping chamber is provided within the housing, the pumping chamber being 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.

[0035] In one embodiment of this disclosure, the maximum volume of the pumping chamber is 100-250 mm. 3 Within the range.

[0036] In one embodiment of this disclosure, the pump assembly further includes a drive mechanism and an eccentric wheel, the eccentric wheel being configured to rotate under the action of the drive mechanism and drive the displacement mechanism to reciprocate during rotation, so as to cyclically decrease and increase the volume of the pumping chamber; the eccentric wheel is configured to have a rotation axis offset from its geometric center; wherein the eccentricity of the eccentric wheel is in the range of 0.5-1.2.

[0037] In one embodiment of this disclosure, a brush head drive mechanism is also included, the brush head drive mechanism including the output shaft; the brush head drive mechanism is configured to drive the contact element to oscillate.

[0038] One beneficial effect of this disclosure is that by incorporating a constriction section in the second flow channel of the nozzle, at least a portion of the inner diameter of which gradually decreases towards the spray end, a Venturi tube structure is formed. When the pump assembly pumps liquid through the constriction section, 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 flow velocity and impact force of the liquid when it is ejected from the spray end. Thus, even with a relatively throttling pump assembly, sufficient water impact force can still be guaranteed to effectively remove plaque and food residue from teeth and between teeth, improving the cleaning effect.

[0039] Furthermore, since the oral cleaning device of this disclosure can perform both brushing and flossing functions, its liquid storage chamber volume is relatively small. By incorporating a nozzle with strong impact force, a more flow-saving pump assembly can be adapted, thereby reducing the inconvenience of frequent water filling during use and improving the user experience. The structural design of this disclosure to enhance the water flow impact force is reasonable, and it can improve water output performance through the optimization of the flow channel structure without significantly increasing energy consumption and equipment complexity, demonstrating good practicality and economy.

[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 is a schematic diagram of the structure of an oral cleaning device provided in an embodiment of the present disclosure;

[0043] Figure 2 is a cross-sectional view of a brush head driving mechanism and cleaning assembly provided in an embodiment of the present disclosure;

[0044] Figure 3 is a magnified view of part A in Figure 2;

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

[0046] Figure 5 is a partial cross-sectional view of a nozzle provided in an embodiment of the present disclosure;

[0047] Figure 6 is a dimensioned view of the structure shown in Figure 5;

[0048] Figure 7 is a cross-sectional view of a pump assembly provided in an embodiment of this disclosure;

[0049] Figure 8 is a cross-sectional view of an oral cleaning device provided in an embodiment of this disclosure.

[0050] The one-to-one correspondence between the component names and reference numerals in Figures 1 to 8 is as follows:

[0051] 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. Brush head drive mechanism; 310. Output shaft; 311. Hollow channel; 400. Cleaning assembly; 410. Main body; 411. First channel; 420. Nozzle; 421. Second channel; 4210. Contraction section; 4211. Spray end; 4212. Input end; 422. Inlet section; 430. Contact element; 431. Bristle attachment; 432. Bristles; 440. Third channel. Detailed Implementation

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] This disclosure provides an oral hygiene device that combines a toothbrush function with a water flossing function. 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 a certain pressure, using the impact force of the high-speed water jet to clean teeth and between teeth. This oral hygiene device integrates toothbrush and water flossing functions into a single device, thereby achieving a more comprehensive cleaning effect.

[0060] Compared to traditional water flossers, the oral cleaning device disclosed herein requires an additional built-in motor, resulting in a relatively small water storage space in the handle. This necessitates multiple water refills during a single cleaning session, leading to a poor user experience. To address this issue, the pump's unit water output can be adjusted to conserve water, thereby extending the water flow time and reducing the frequency of water refills per cleaning session, thus improving the user experience. However, this design reduces the water's impact force, affecting the cleaning effect. To enhance the water's impact force, this disclosure redesigns the water flow path, enabling the maintenance of a strong water impact force even with a lower water flow rate.

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0062] Referring to Figures 1, 2, and 8, the oral cleaning device of this disclosure includes: a grip 200, a pump assembly 100, a brush head drive mechanism 300, and a cleaning assembly 400. The grip 200 extends along a first axis, as shown in Figure 2, where the X-axis indicates the direction of extension of the first axis. The grip 200 may be shaped like a long, thin cylinder, thus facilitating user gripping.

[0063] 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. The pump assembly 100, the brush head drive mechanism 300, and the energy source (such as a battery, charging assembly, etc.) can all be disposed in the power chamber 210.

[0064] A cleaning component 400 is disposed at the end of the grip portion 200. The cleaning component 400 can be a toothbrush head, a rinsing head, a rinsing head, or other devices capable of cleaning the oral cavity. Figures 2 and 3 illustrate the cleaning component 400 as an example of a rinsing head. The cleaning component 400 may include a main body 410 connected to the grip portion 200. The main body 410 is provided with a nozzle 420 and a contact member 430. The nozzle 420 is mainly used to realize the rinsing function, and the contact member 430 is mainly used to realize the toothbrush function.

[0065] In one embodiment of this disclosure, as shown in FIG3, the contact member 430 includes a bristle member 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 member 431. The second axis intersects the first axis, and the direction shown by the Y-axis in FIG3 is the extension direction of the second axis. In a 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 perpendicularly disposed on the bristle member 431, thereby forming a conventional toothbrush configuration, which is convenient for users to perform oral cleaning.

[0066] 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.

[0067] In one embodiment of this disclosure, the nozzle 420 is configured to be coupled to the contact member 430, which 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. The coupling process of the nozzle 420 must ensure a smooth transition connection of the water channels inside the cleaning assembly 400, thereby minimizing flow resistance and increasing the speed and impact of the water flow. The contact member 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 member 430, preventing the bristles 432 from falling off after a period of use, and extending the service life of the oral cleaning device.

[0068] Traditional water flossers without brushing function can easily impact the gums, causing stinging and even bleeding under high water pressure. However, the oral cleaning device disclosed herein integrates the nozzle 420 onto the contact element 430, allowing the bristles 432 to position the water flossing function. Specifically, after brushing each tooth, the device can target the adjacent gaps between teeth, minimizing impact on the gums and improving the user experience.

[0069] Referring to Figure 1, the pump assembly 100 and the brush head drive mechanism 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 brush head drive mechanism 300 can be positioned closer to the top of the grip portion 200 than the pump assembly 100 (as shown in Figures 1 and 8, the brush head drive mechanism 300 is located above the pump assembly 100), so that the output shaft 310 of the brush head drive mechanism 300 can extend out of the top of the grip portion 200 and connect to the cleaning assembly 400 to drive the cleaning assembly 400.

[0070] The brush head drive mechanism 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 brush head drive mechanism 300 may include a motor body and an output shaft 310. The output shaft 310 extends along a first axis and can pass through the motor body axially. The top end of the output shaft 310 can extend beyond the top end of the motor body and connect to the cleaning component 400. The brush head drive mechanism 300 is configured to drive the contact member 430 to oscillate, thereby achieving the effect of automatic brushing.

[0071] Referring to Figure 1, the pump assembly 100 is provided with an inlet channel 7 and an outlet channel 8. The inlet channel 7 is configured to connect to the liquid storage chamber 220. The liquid in the liquid storage chamber 220 can enter the pump assembly 100 through the inlet channel 7 and be pumped out through the outlet channel 8 under the pumping action of the pump assembly 100.

[0072] In one specific embodiment of this disclosure, as shown in FIG7, the pump assembly 100 includes a housing 1 and a displacement mechanism 2 engaged with the housing 1. A pumping chamber 10 is provided within the housing 1, and the pumping chamber 10 is connected to an inlet channel 7 and an 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 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, and the housing 1 includes a valve plate 11.

[0073] The displacement mechanism 2 is engaged with the housing 1. The side of the displacement mechanism 2 facing the first direction S1 and the valve plate 11 enclose the 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. The 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.

[0074] 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. As shown in Figure 7, the eccentric wheel 3 is disposed inside the housing 1 and is drivenly connected to the side of the displacement mechanism 2 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 rotation, the eccentric wheel 3 drives the displacement mechanism 2 to reciprocate along the first direction S1 and the second direction S2, thereby cyclically reducing and increasing the volume of the pumping chamber 10.

[0075] 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.

[0076] 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.

[0077] Referring to Figures 1 to 3, a hollow flow channel 311 extending along a first axis is provided within the output shaft 310 of the brush head drive mechanism 300. The hollow flow channel 311 is configured to communicate with the liquid outlet flow channel 8. A first flow channel 411 communicating with the hollow flow channel 311 and extending at least partially along the first axis is provided within the main body 410 of the cleaning assembly 400. A second flow channel 421 communicating with the first flow channel 411 is provided within the nozzle 420. The second flow channel 421 is configured to extend along a second axis. As shown in Figures 4 and 5, 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 the liquid in 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.

[0078] Specifically, 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 channel 7 and the inlet of the pump assembly 100 into the pumping chamber 10, then through the outlet of the pump assembly 100 and the outlet channel 8 into the hollow channel 311, and then through the first channel 411 in the main body 410 of the cleaning assembly 400 and the second channel 421 in the nozzle 420, and flow out from the spray end 4211.

[0079] 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.

[0080] Referring 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.

[0081] Furthermore, since the oral hygiene device of this disclosure can perform both brushing and flossing functions, its liquid storage chamber 220 has a relatively small volume. By setting a nozzle 420 with strong impact force, a more flow-saving pump assembly 100 can be adapted, thereby reducing the inconvenience of frequent water filling during use and improving the user experience. The structural design of this disclosure to enhance the water flow impact force is reasonable, and it can improve water output performance through the optimization of the flow channel structure without significantly increasing energy consumption and equipment complexity, thus having good practicality and economy.

[0082] Experimental results show that the average jet velocity of the oral cleaning device disclosed herein can reach 12.03 m / s, which is 20% higher than that of a conventional oral cleaning device without a constriction section 4210 (average jet velocity 10.05 m / s). Furthermore, the instantaneous average impact force of the oral cleaning device disclosed herein can reach 44.6 g, which is 27% higher than that of a conventional oral cleaning device without a constriction section 4210 (instantaneous average impact force 35.1 g).

[0083] In a specific embodiment of this disclosure, as shown in FIG6, 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 with 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.

[0084] In one specific embodiment of this disclosure, referring to Figures 3 and 6, 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 first flow channel 411. This allows the liquid to smoothly transition from the first flow channel 411 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.

[0085] In a specific embodiment of this disclosure, as shown in FIG6, 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 4210 and the second axis is 7-13°. The cross-section shown in FIG6 is the plane defined by the first axis and the second axis, and the contraction section 4210 appears as a trapezoid in this cross-sectional view, with the wall of the contraction section 4210 being the hypotenuse of the 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°), that is, 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 sprayed out with appropriate impact force.

[0086] In one embodiment of this disclosure, as shown in FIG5, the inner diameter of the injection 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 near the injection 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 injection end 4211 where the inner diameter no longer changes, thus achieving a smooth transition. The liquid can maintain its flow rate in the injection end 4211 and be ejected with a suitable impact force.

[0087] 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.

[0088] In one embodiment of this disclosure, the first flow channel 411 includes a first 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 into the second flow channel 421, it can naturally accelerate due to the gradual decrease in the inner diameter of the first connecting section, thereby laying the foundation for further increasing the flow velocity and impact force in the subsequent flow into the contraction section 4210, further enhancing the cleaning performance and the outflow impact force.

[0089] In one specific embodiment of this disclosure, 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.

[0090] In one embodiment of this disclosure, the inner diameter of the end of the second flow channel 421 away from the jet end 4211 is equal to the inner diameter of the first flow channel 411, 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 liquid outlet flow channel 8 of the pump assembly 100 is equal to the inner diameter of the hollow flow channel 311. In a preferred embodiment, the inner diameters of the liquid outlet flow channel 8, the hollow flow channel 311, the first flow channel 411, and the end of the second flow channel 421 away from the jet 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 flow 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.

[0091] In one embodiment of this disclosure, the output shaft 310 is configured to extend into the main body 410 so that the hollow flow channel 311 communicates with the first flow channel 411 and is aligned with each other on the first axis. The precise alignment of the output shaft 310 and the main body 410 enhances the overall structural stability of the device, preventing component loosening due to vibration of the output shaft 310. Furthermore, the alignment design avoids bending and misalignment at the connection between the hollow flow channel 311 and the first flow channel 411, reducing resistance and energy loss as the liquid flows through the connection point, allowing the liquid to flow smoothly and unimpeded from the hollow flow channel 311 into the first flow channel 411, ensuring efficient and stable liquid transfer.

[0092] In one embodiment of this disclosure, as shown in FIG3, the first flow channel 411 is configured to extend entirely along the first axis. A third flow channel 440 is also provided within the cleaning assembly 400. The opposite ends of the third flow channel 440 are respectively connected to the first flow channel 411 and the second flow channel 421. The third flow channel 440 is configured to have a bending angle. Specifically, the third flow channel 440 can be configured as an arc-shaped structure. Compared to the traditional right-angle connection design, the arc-shaped third flow channel 440 effectively reduces 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, etc., generated during liquid flow, avoids pressure instability caused by turbulence, and maintains a stable liquid flow rate and pressure.

[0093] In one embodiment of this disclosure, 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. This further increases the liquid flow velocity, allowing the liquid to accelerate in advance in the second connecting section of the third flow channel 440 before entering the contraction section 4210 of the second flow channel 421, thereby further enhancing the liquid ejection impact force of the ejector end 4211.

[0094] In another embodiment of this disclosure, the inner diameter of the third flow channel 440 is equal to the inner diameter of the first flow channel 411 and equal to the inner diameter of the end of the second flow channel 421 away from the spray end 4211; the inner diameter of the third flow channel 440 is configured to remain constant. This significantly improves the fluid transfer efficiency of the oral cleaning device. The equal inner diameters of the first flow channel 411, the third flow channel 440, and the end of the second flow channel 421 away from the spray end 4211 all remain equal. This equal inner diameter design avoids turbulence and pressure loss caused by abrupt changes in the flow channel cross-section, reduces fluid resistance, ensures that the liquid maintains a stable flow state within the main body 410 of the cleaning component 400, and minimizes energy loss.

[0095] In one embodiment of this disclosure, as shown in FIG3, the contraction section 4210 is configured to communicate with the third flow channel 440. In another embodiment of this disclosure, as shown in FIG4, the second flow channel 421 further includes an inlet section 422, which is configured to communicate with 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.

[0096] 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.

[0097] 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 grip (200) extends along a first axis, and a power chamber (210) and a liquid storage chamber (220) are provided in the grip (200); a pump assembly (100) is disposed in the power chamber (210); the pump assembly (100) is provided with an inlet channel (7) and an outlet channel (8), and the inlet channel (7) is configured to communicate with the liquid storage chamber (220); an output shaft (310) extends along a first axis, and a hollow channel (311) extending along the first axis is provided in the output shaft (310), and the hollow channel (311) is configured to communicate with the outlet channel (8); a cleaning assembly (400) is disposed at one end of the grip (200); the cleaning assembly (400) includes a main body (410) connected to the grip (200), and a nozzle (420) and a contact element (430) are provided 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) is configured to extend along a second axis that intersects the first axis; wherein, the second flow channel (421) includes a contraction section (4210), the end of the contraction section (4210) away from the first flow channel (411) is enclosed to form a spray end (4211); the pump assembly (100) is configured to pump the liquid in 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); at least a portion of the inner diameter of the contraction section (4210) is configured to gradually decrease in the direction close to the spray end (4211).

2. The oral hygiene device according to claim 1, 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.

3. The oral cleaning device according to claim 2, characterized in that, 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 first flow channel (411).

4. The oral cleaning device according to claim 2, 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).

5. The oral cleaning device according to claim 1, characterized in that, The first flow channel (411) includes a first connecting section near the second flow channel (421), and the inner diameter of the first connecting section is configured to gradually decrease in the flow direction.

6. The oral cleaning device according to claim 1, characterized in that, The length of the contraction section (4210) in the direction of the second axis is 1.8-3 mm.

7. The oral cleaning device according to claim 6, characterized in that, The length of the contraction section (4210) in the direction of the second axis is 2-2.5 mm.

8. The oral cleaning device according to claim 1, 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°.

9. The oral cleaning device according to claim 1, characterized in that, The inner diameter of the end of the second flow channel (421) away from the injection end (4211) is equal to the inner diameter of the first flow channel (411).

10. The oral hygiene device according to claim 9, characterized in that, The inner diameter of the first flow channel (411) is equal to the inner diameter of the hollow flow channel (311).

11. The oral hygiene device according to claim 10, characterized in that, The output shaft (310) is configured to extend into the main body (410) so that the hollow flow channel (311) communicates with the first flow channel (411) and is aligned with each other on the first axis.

12. The oral hygiene device according to claim 10, characterized in that, The inner diameter of the outlet flow channel (8) of the pump assembly (100) is equal to the inner diameter of the hollow flow channel (311).

13. The oral hygiene device according to claim 1, characterized in that, The cleaning component (400) is further 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.

14. The oral hygiene device according to claim 13, characterized in that, The first flow channel (411) is configured to extend entirely along the first axis.

15. The oral hygiene device according to claim 13, characterized in that, The third flow channel (440) includes a second connecting section near the second flow channel (421), the inner diameter of which is configured to gradually decrease in the flow direction.

16. The oral hygiene device according to claim 13, characterized in that, The contraction section (4210) is configured to communicate with the third flow channel (440); or, the second flow channel (421) further includes an inlet section (422) configured to communicate with the third flow channel (440) to the contraction section (4210).

17. The oral hygiene device according to claim 16, characterized in that, In the direction of the second axis, the inner diameter of the liquid 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 liquid inlet section (422).

18. The oral hygiene device according to claim 16, characterized in that, When the second flow channel (421) includes an inlet section (422), the ratio of the length of the inlet section (422) to the length of the contraction section (4210) in the second axial direction is in the range of 0.7-1.

3.

19. The oral hygiene device according to claim 13, characterized in that, The inner diameter of the third flow channel (440) is equal to the inner diameter of the first flow channel (411) and equal to the inner diameter of the end of the second flow channel (421) away from the injection end (4211); the inner diameter of the third flow channel (440) is configured to remain constant.

20. 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.

21. The oral hygiene device according to claim 1, characterized in that, The nozzle (420) is configured to be coupled to the contact (430), which is configured to engage with the body portion (410).

22. The oral hygiene device according to claim 1, characterized in that, The contact element (430) includes a bristle attachment (431) on which bristles (432) are provided, the bristles (432) being configured to extend along the second axis in a direction away from the bristle attachment (431).

23. The oral hygiene device according to claim 1, characterized in that, The angle between the first axis and the second axis ranges from 60° to 120°.

24. The oral hygiene device according to claim 23, characterized in that, The angle between the first axis and the second axis is 90°.

25. The oral hygiene device according to any one of claims 1-24, characterized in that, The pump assembly (100) includes a housing (1) and a displacement mechanism (2) engaged with the housing (1); a pumping chamber (10) is provided inside the housing (1), the pumping chamber (10) being 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).

26. The oral hygiene device according to claim 25, characterized in that, The maximum volume of the pumping chamber (10) is 100-250 mm. 3 Within the range.

27. The oral hygiene device according to claim 25, 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 is in the range of 0.5-1.

2.

28. The oral hygiene device according to any one of claims 1-24, characterized in that, It also includes a brush head drive mechanism (300), which includes the output shaft (310); the brush head drive mechanism (300) is configured to drive the contact (430) to oscillate.

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