Nozzle and oral cavity cleaning device

Abstract

According to the nozzle and the oral cavity cleaning device, the nozzle comprises a nozzle piece and a rotational flow piece, a first channel, a second channel and a third channel are formed in the nozzle piece, the second channel is provided with a rotational flow cavity, the first channel is communicated with the rotational flow cavity in the tangential direction of the rotational flow cavity, and the third channel is coaxially communicated with the second channel in the axial direction of the rotational flow cavity; the maximum cross section area of the first channel and the maximum cross section area of the third channel are both smaller than the minimum cross section area of the rotational flow cavity; the rotational flow piece is arranged in the second channel and provided with a rotational flow part arranged in the rotational flow cavity. By means of the communication relation between the first channel and the rotational flow cavity and the configured rotational flow piece, the fluid medium entering the rotational flow cavity at a certain pressure can be rotated and dispersed, and therefore rotating water flow with a large angle is output through the third channel; meanwhile, by means of the structural characteristic that the cross section size of the third channel is smaller than that of the rotational flow cavity, the water outlet pressure can be enhanced, the impact force of rotational water flow is guaranteed, and therefore the effect of considering cleaning force and comfort is achieved.

Description

Technical Field

[0001] The utility model relates to the field of oral care equipment, in particular to a nozzle and an oral cleaning device. Background Art

[0002] As a common oral cleaning and care device, the working principle of the water flosser is to use pulse impact to eject cleaning fluid from the nozzle of the water flosser, thereby achieving the effect of cleaning teeth and interdental spaces. The nozzles of traditional water flossers mostly spray water in a straight line, which often causes damage to teeth, gums, etc. due to the excessive cleaning force of the water flow.

[0003] In order to obtain a softer and more comfortable flushing experience, the spiral structure has been gradually introduced into the nozzle structure design of the water flosser. With the help of the spiral structure, the water flow can be adjusted from a straight jet to a rotating jet, so as to improve the flushing comfort by reducing the frontal impact on the teeth, gums and other parts; however, the spiral structure currently designed in the nozzle often increases the resistance of the water flow and consumes the limited kinetic energy of the water, thereby reducing the cleaning efficiency due to insufficient cleaning power. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a nozzle and an oral cleaning device using the nozzle, so as to achieve the purpose of taking both cleaning power and comfort into consideration.

[0005] According to a first aspect, an embodiment provides a nozzle for an oral cleaning device, the nozzle comprising a nozzle member and a swirl member, a first channel, a second channel and a third channel are formed inside the nozzle member, the second channel has a swirl chamber, the first channel is connected to the swirl chamber in a tangential or radial direction of the swirl chamber, the third channel is connected to the second channel in a coaxial direction of the swirl chamber, and the minimum cross-sectional area of ​​the swirl chamber is greater than the maximum cross-sectional area of ​​the first channel and the maximum cross-sectional area of ​​the third channel;

[0006] The swirl member is arranged in the second channel, and the swirl member has a swirl portion arranged in the swirl cavity along the axial direction of the swirl cavity; the swirl portion is used to guide the fluid medium entering the swirl cavity through the first channel to flow in a spiral diffusion flow and flow to the third channel.

[0007] In one embodiment, the second channel further has a focusing chamber, which is arranged between the third channel and the vortex chamber along the axial direction of the vortex chamber, and the cross-sectional area of ​​the focusing chamber gradually decreases from one end of the focusing chamber close to the vortex chamber to one end close to the third channel.

[0008] In one embodiment, the swirl element further has a diffuser portion arranged in the focusing chamber, the diffuser portion is provided at one end of the swirl portion, and the cross-sectional area of ​​the diffuser portion gradually decreases from the end of the diffuser portion close to the swirl portion to the end away from the swirl portion; the diffuser portion has a plurality of diffuser flow channels, the diffuser flow channels are arranged through the diffuser portion, and the plurality of diffuser flow channels are arranged at intervals around the fluid inlet of the third channel.

[0009] In one embodiment, the swirl element further has a flow blocking portion arranged in the swirl chamber, and the flow blocking portion is arranged at one end of the swirl portion away from the diffuser; in the axial direction of the swirl chamber, the flow blocking portion and the diffuser are located on both sides of the fluid outlet of the first channel; the flow blocking portion is used to prevent the fluid medium in the swirl chamber from flowing in a direction away from the third channel.

[0010] In one embodiment, the areas of any two cross sections of the swirl portion are equal, the areas of any two cross sections of the swirl chamber are equal, and the cross-sectional area of ​​the baffle portion and the maximum cross-sectional area of ​​the diffuser portion are both greater than the cross-sectional area of ​​the swirl portion.

[0011] In one embodiment, the peripheral surface of the swirl portion and the cavity wall of the swirl cavity are both smooth curved surface structures.

[0012] In one embodiment, in the axial direction of the swirl chamber, a preset gap is provided between the diffuser and the cavity wall of the focusing cavity.

[0013] In one embodiment, a plurality of diffusion channels are provided on the cavity wall of the focusing cavity, and the diffusion channels extend from one end of the focusing cavity close to the third channel to one end close to the vortex cavity, and the plurality of diffusion channels are arranged at intervals around the fluid inlet of the third channel.

[0014] In one embodiment, the swirl portion is an impeller structure; the swirl portion can rotate in the swirl chamber with the axis of the third channel as the rotation axis.

[0015] In one embodiment, the swirl component further has a flow blocking portion arranged in the swirl chamber, and the flow blocking portion is set at one end of the swirl portion; in the axial direction of the swirl chamber, the fluid inlet of the third channel and the flow blocking portion are located on both sides of the fluid outlet of the first channel; the flow blocking portion is used to prevent the fluid medium in the swirl chamber from flowing in a direction away from the third channel.

[0016] In one embodiment, the areas of any two cross sections of the cyclone chamber are equal, and / or the chamber wall of the cyclone chamber is a smooth curved structure.

[0017] In one embodiment, the diffusion channel is arranged in an inclined shape in the axial direction of the cyclone chamber, and the inclination direction of the diffusion channel is the same as or opposite to the direction in which the cyclone portion guides the fluid medium to perform spiral diffusion flow.

[0018] In one embodiment, the width of the diffusion channel is between 0.5 mm and 1.5 mm, the length of the diffusion channel in the extension direction of the cavity wall of the focusing cavity is between 1.5 and 5.0, and the inclination angle of the diffusion channel is between 0° and 60°.

[0019] In one embodiment, the nozzle member comprises a nozzle head and a spray bar, wherein the nozzle head comprises a nozzle front cover, a nozzle rear cover and a nozzle surrounding wall; wherein:

[0020] The nozzle front cover and the nozzle rear cover are arranged opposite to each other with a distance, and the third channel is arranged on the nozzle front cover along the geometric center line of the nozzle front cover; the nozzle surrounding wall is arranged between the nozzle front cover and the nozzle rear cover to enclose the nozzle front cover and the nozzle rear cover to form the second channel;

[0021] One end of the spray bar portion in the length direction is connected to the spray head portion at the nozzle surrounding wall; the first channel is arranged through the spray bar portion along the length direction of the spray bar portion and is connected to the swirl chamber at the nozzle surrounding wall.

[0022] In one embodiment, one of the nozzle front cover and the nozzle rear cover is an integral structure with the nozzle wall and the spray rod portion; the other of the nozzle front cover and the nozzle rear cover is provided with a sealing portion for an assembly opening formed by the nozzle wall to confine the swirl member within the second channel.

[0023] In one embodiment, the spray rod portion has a mounting section, a bending section and a connecting section arranged in sequence along its length direction, an end of the mounting section away from the bending section is used to connect to a fluid source, and an end of the connecting section away from the bending section is connected to the spray head portion at the nozzle wall; an axial centerline of the mounting section is coplanar with a geometric centerline of the nozzle front cover.

[0024] In one embodiment, a cross-sectional area of ​​the nozzle front cover gradually decreases from a side of the nozzle front cover facing the nozzle rear cover toward a side facing away from the nozzle rear cover.

[0025] In one embodiment, a cross-sectional area of ​​the third channel gradually increases from an end of the third channel close to the second channel toward an end of the third channel far from the second channel.

[0026] In one embodiment, the maximum cross-sectional area of ​​the third channel is less than 3 square millimeters.

[0027] In one embodiment, the ratio of the minimum cross-sectional area of ​​the swirl chamber to the maximum cross-sectional area of ​​the first channel is between 1.5-4.

[0028] According to a second aspect, an embodiment provides an oral cleaning device, comprising a pump body and the nozzle described in the first aspect, wherein the nozzle is connected to the pump body.

[0029] The nozzle according to the above embodiment includes a nozzle member and a swirl member. The nozzle member is formed with a first channel, a second channel and a third channel inside. The second channel has a swirl chamber. The first channel is connected to the swirl chamber along the tangential or radial direction of the swirl chamber. The third channel is connected to the second channel coaxially along the axial direction of the swirl chamber. The maximum cross-sectional areas of the first channel and the third channel are both smaller than the minimum cross-sectional area of ​​the swirl chamber. The swirl member is arranged in the second channel. The swirl member has a swirl portion arranged in the swirl chamber. The swirl portion is used to guide the fluid medium in the swirl chamber to flow in a spiral diffusion and flow to the third channel. By utilizing the connection relationship between the first channel and the swirl chamber and the configured swirl member, the fluid medium entering the swirl chamber at a certain pressure can be rotated and discretely dispersed, thereby outputting a rotating water flow with a larger angle in the third channel. At the same time, by utilizing the structural characteristics that the cross-sectional size of the third channel is smaller than the cross-sectional size of the swirl chamber, the water pressure of the water outlet can be enhanced and the impact force of the rotating water flow can be guaranteed, thereby achieving the effect of taking into account both cleaning power and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the outer contour structure of a nozzle according to an embodiment (I).

[0031] Figure 2 A schematic diagram of the structural arrangement of a fluid channel in a nozzle according to an embodiment.

[0032] Figure 3 Schematic diagram of the structural relationship between the swirl member and the nozzle member in a nozzle of an embodiment (I).

[0033] Figure 4 Schematic diagram of the structural relationship between the swirl member and the nozzle member in a nozzle of an embodiment (II).

[0034] Figure 5 This is a schematic diagram of the structure of a nozzle head in a nozzle according to an embodiment of the present invention after omitting the nozzle rear cover.

[0035] Figure 6 FIG1 is a schematic diagram of the structure of a swirl member in a nozzle according to an embodiment of the present invention (I).

[0036] Figure 7 This is a schematic diagram of the outer contour structure of a nozzle according to an embodiment (II).

[0037] Figure 8Schematic diagram of the internal structure of the nozzle head of an embodiment (II).

[0038] Fig. 9 Schematic diagram of the structural relationship between the swirl member and the nozzle member in a nozzle of an embodiment (III).

[0039] Fig.10 It is a schematic structural diagram of a nozzle front cover in a nozzle of an embodiment.

[0040] Fig.11 This is a schematic diagram of the structure of a swirl component in a nozzle according to an embodiment (II).

[0041] Fig.12 for Fig.11 Schematic diagram of the planar structure of the swirl component.

[0042] Fig.13 Schematic diagram of the reference structure of an oral cleaning device according to an embodiment.

[0043] In the figure:

[0044] 10. Nozzle member; 10a. First channel; 10b. Second channel; a. Swirl chamber; b. Converging chamber; 10c. Third channel; 11. Spray head; 11a. Nozzle front cover; 11b. Nozzle rear cover; 11c. Nozzle surrounding wall; 12. Spray rod; 12a. Mounting section; 12b. Bending section; 12c. Connecting section;

[0045] 20. Swirl component; 20a. Diffusion channel; 21. Swirl portion; 22. Diffusion portion; 23. Flow blocking portion; A. Nozzle; B. Machine body. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0047] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0048] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0049] See also Figures 1 to 13 , an embodiment of the present application provides an oral cleaning device, such as a water flosser; the device includes a nozzle A, a body B, and other functional components that exist as needed; wherein the nozzle A is arranged on the body B in a detachable or non-detachable manner, and a fluid channel for guiding the flow of a fluid medium into and out of the nozzle A is formed inside the nozzle A, that is, the fluid channel should have a fluid inlet and a fluid outlet; a liquid storage part (such as a water tank) for storing a cleaning medium (such as a liquid fluid medium such as physiological saline, medical agents, etc.) and a pump body (not shown in the figure) are provided in the body B, and the pump body is connected and arranged between the nozzle A and the liquid storage part.

[0050] When the pump body is working, the fluid medium stored in the liquid storage part can be pumped to the fluid inlet of nozzle A, so that the fluid medium flows along the fluid channel of nozzle A to the fluid outlet of nozzle A, and finally is ejected from the fluid outlet of nozzle A in the form of pulse impact, thereby achieving cleaning of teeth, tooth gaps and other parts.

[0051] The body B and other functional components in the oral cleaning device can refer to the prior art, and the nozzle A and its related structures are mainly introduced below.

[0052] See also Figures 1 to 13 The nozzle A includes a nozzle member 10 and a swirl member 20, wherein the nozzle member 10 has a nozzle head portion 11 and a spray bar portion 12; wherein, in the length direction of the spray bar portion 12, the nozzle head portion 11 is arranged at one end of the spray bar portion 12, and is mainly used for aligning or at least partially extending into the oral cavity; the end of the spray bar portion 12 away from the nozzle head portion 11 is used for connecting with the machine body B, for example, a detachable connection or a non-detachable connection.

[0053] See also Figure 2A first channel 10a is formed inside the spray bar portion 12, and a second channel 10b and a third channel 10c are formed inside the spray head portion 11, and the second channel 10b is connected to the first channel 10a and the third channel 10c; it can be understood that the first channel 10a is equivalent to being arranged to penetrate the spray bar portion 12 along the length direction of the spray bar portion 12, while the second channel 10b and the third channel 10c are equivalent to being arranged to penetrate the spray head portion 11 in the length direction of the spray head portion 11; the first channel 10a, the second channel 10b and the third channel 10c are connected to form a fluid channel of the nozzle A, and the end of the first channel 10a away from the second channel 10b serves as the fluid inlet of the nozzle A for connecting to the pump body; the end of the third channel 10c away from the second channel 10b serves as the fluid outlet of the nozzle A so that the fluid medium can be sprayed out.

[0054] See also Figure 3 , Figure 4 and Fig. 9 The swirl member 20 is arranged in the second channel 10b, and the swirl member 20 has a swirl portion 21 extending along the axial direction or the length direction of the second channel 10b; for the convenience of distinction and description, the spatial area of ​​the second channel 10b corresponding to the swirl portion 21 or the spatial area accommodating the swirl portion 21 is defined as a swirl chamber a; it can be understood that the swirl portion 21 is equivalent to being arranged in the swirl chamber a along the axial extension of the swirl chamber a; in specific implementation, the swirl portion 21 can be fixedly arranged in the swirl chamber a, and can also be rotatably arranged in the swirl chamber a.

[0055] As for the specific structural relationship between the various channels, the first channel 10a is connected to the swirl chamber a along the tangential direction of the swirl chamber a, and the third channel 10c is connected to the second channel 10b along the axial direction of the swirl chamber a; and the maximum cross-sectional area of ​​the first channel 10a and the maximum cross-sectional area of ​​the third channel 10c are both smaller than the minimum cross-sectional area of ​​the swirl chamber a.

[0056] It should be noted that the "cross-section" mentioned above can be understood as: the cross-section formed after cutting the corresponding channel based on a plane perpendicular to the axial centerline of the corresponding channel, that is, the cross-section of the corresponding channel; the contour shape of the cross-section of each channel can be circular or polygonal such as a rectangle.

[0057] When the fluid medium is pumped into the cyclone chamber a through the first channel 10a at a certain pressure under the action of the pump body, based on the tangential connection relationship between the first channel 10a and the cyclone chamber a, the water flow entering the cyclone chamber a can form a high-speed rotating water flow under the action of centrifugal force, that is, the water flow entering the cyclone chamber a flows along the axial direction of the cyclone chamber a on the one hand, and flows outward along the radial direction of the cyclone chamber a on the other hand.

[0058] Due to the existence of the swirl portion 21, the spiral flow effect of the water flow can be enhanced, prompting the fluid medium or water flow to flow in the swirl chamber a in a spiral diffusion manner, and the fluid medium or water flow can be guided to flow toward the third channel 10c, so that a rotating water flow with a larger angle can be finally ejected from the third channel 10c, achieving the effect of adjusting the water flow from a straight jet to a rotating jet.

[0059] At the same time, by virtue of the fact that the swirl chamber a has a larger cross-sectional size than the first channel 10a and the third channel 10c, a cavitation effect can be generated on the fluid medium inside the nozzle A; and by virtue of the fact that the cross-sectional size of the third channel 10c is smaller than that of the swirl chamber a, the outlet pressure of the rotating water flow can be increased, ensuring that the rotating water flow ejected from the nozzle A has sufficient impact force.

[0060] Based on this, the water flow ejected from nozzle A can increase cleaning power and comfort due to the combined effects of spiral rotation, greater impact force and cavitation effect, thereby achieving the effect of balancing cleaning efficiency and comfort.

[0061] In some embodiments, the first channel 10a and the swirl chamber a may also be arranged to be connected along the radial direction of the swirl chamber a, that is, the fluid outlet of the first channel 10a is directly opposite the swirl portion 21 in the radial direction of the swirl chamber a; the water flow entering the swirl chamber a through the first channel 10a at a certain pressure may form a rotating water flow in the swirl chamber a due to the structural interference of the swirl portion 21, and then, under the guidance of the swirl portion 21, the water flow may diffuse in the swirl chamber a and flow toward the third channel 10c.

[0062] In one embodiment, see Figures 2 to 4 as well as Figure 8 and Fig. 9 The cross-sectional area of ​​the third channel 10c gradually increases from the end of the third channel 10c close to the second channel 10b to the end away from the second channel 10b, that is, the third channel 10c is a tapered channel structure with a variable diameter; thus, it is not only conducive to the formation of cavitation rotating water flow and improves the cleaning effect; it can also increase the water outlet area of ​​the nozzle A and improve the cleaning efficiency.

[0063] In specific implementation, the maximum cross-sectional area of ​​the third channel 10c can be controlled to be no more than 3 square millimeters to ensure the water flow pressure and ensure that the cavitation rotating water flow ejected from the third channel 10c has sufficient impact force.

[0064] In one embodiment, please combine Figures 2 to 4 as well as Figure 8 and Fig. 9The ratio between the minimum cross-sectional area of ​​the swirl chamber a and the maximum cross-sectional area of ​​the first channel 10a is between 1.5 and 4, which is conducive to the formation of a rotating water flow under the action of centrifugal force when water flows through the first channel 10a into the swirl chamber a, and then forms a high-speed rotating flow field in the swirl chamber a or the second channel b under the cooperation of the swirl part 21. In specific implementation, taking the cross-sectional profile shape of the first channel 10a as a circle as an example, the inner diameter of the first channel 10a can be controlled between 5mm and 10mm, and the size of the swirl chamber a is selected and set according to the size relationship between the swirl chamber a and the first channel 10a.

[0065] In one embodiment, see Figures 2 to 5 as well as Figures 8 to 10 , the second channel 10b also has a focusing chamber b, which is arranged between the third channel 10c and the swirl chamber a along the axial direction of the swirl chamber a, and the cross-sectional area of ​​the focusing chamber b gradually decreases from the end of the focusing chamber b close to the swirl chamber a to the end close to the third channel 10c. It can be understood that in some embodiments, the second channel 10b can be divided into two parts along its axial centerline direction, the part connected to the first channel 10a is the swirl chamber a, and the other part connected to the third channel 10c is the focusing chamber b.

[0066] By utilizing the structural feature that the cross-sectional area of ​​the focusing chamber b gradually decreases toward one end of the third channel 10c, the spiral water flow discharged from the swirl chamber a can be gradually gathered in the third channel 10c, which can not only cooperate with the third channel 10c to increase the pressure of the rotating water flow discharged from the nozzle A and improve the impact force; but also reduce the influence on the spiral effect of the spiral water flow.

[0067] In specific implementation, the contour shapes of the cross-sections of the focusing chamber b and the swirl chamber a can be set to be circular, that is, the focusing chamber b is roughly a truncated cone-shaped cavity structure, the swirl chamber a is roughly a cylindrical cavity structure, and the cavity walls of the swirl chamber a and the focusing chamber b are both smooth curved surface structures; thereby, the loss of water flow pressure can be effectively reduced, the effect of the spiral flow of water flow can be enhanced, and it can be ensured that the rotating water flow ejected from the nozzle A has sufficient impact force.

[0068] Of course, the swirl chamber a and the focusing chamber b may also adopt other structural forms to meet different needs, which will be explained below, so they will not be repeated here.

[0069] In one embodiment, see Figures 1 to 10The nozzle head 11 has a nozzle front cover 11a, a nozzle rear cover 11b and a nozzle wall 11c; wherein the nozzle front cover 11a and the nozzle rear cover 11b are arranged opposite to each other in the communication direction between the third channel 10c and the second channel 10b, and the third channel 10c is arranged on the nozzle front cover 11a along the geometric center line of the nozzle front cover 11a; the nozzle wall 11c surrounds the geometric center line of the nozzle front cover 11a and is arranged between the nozzle front cover 11a and the nozzle rear cover 11b, so that the second channel 10b is formed by the nozzle front cover 11a, the nozzle rear cover 11b and the nozzle wall 11c. Correspondingly, one end of the spray bar 12 in the length direction is connected to the nozzle head 11 at the position of the nozzle wall 11c close to the nozzle rear cover 11b, so as to form a structural relationship in which the first channel 10a is connected to the swirl chamber a along the tangential or radial direction of the swirl chamber a.

[0070] In specific implementation, the nozzle front cover 11a, the nozzle rear cover 11b, the nozzle surrounding wall 11c and the spray rod portion 12 can adopt a split assembly structure, or partially adopt an integrated structure, so as to facilitate the assembly of the swirl element 20 in the second channel 10b.

[0071] For example, see Figure 3 and Figure 4 The nozzle front cover 11a, the nozzle surrounding wall 11c and the spray rod portion 12 are an integrated structure (for example, integrally injection molded), and the nozzle rear cover 11b and the swirl member 20 are an integrated structure. The nozzle rear cover 11b is sealed by bonding, welding, etc. to cover the assembly opening formed by the nozzle surrounding wall 11c, so that the swirl member 20 can be confined in the second channel 10b.

[0072] For example, see Figure 8 and Fig. 9 The nozzle rear cover 11b, the nozzle surrounding wall 11c and the spray rod part 12 are an integrated structure (for example, integrally injection molded), the swirl member 20 is movably arranged in the second channel 10b, and the nozzle front cover 11a is sealed by bonding, welding, etc. The assembly opening formed by the nozzle surrounding wall 11c is set, and the swirl member 20 can also be confined in the second channel 10b.

[0073] In one embodiment, see Figures 1 to 4 as well as Figures 5 to 10 The overall contour shape of the nozzle front cover 11a can be set to be conical, that is, the overall cross-sectional area of ​​the nozzle front cover 11a gradually decreases from the side of the nozzle front cover 11a facing the nozzle rear cover 11b to the side facing away from the nozzle rear cover 11b; at the same time, a conical cavity is provided on the side of the nozzle front cover 11a facing the nozzle rear cover 11b, and the third channel 10c passes through the conical cavity from the side of the nozzle front cover 11a facing away from the nozzle rear cover 11b along the geometric center line of the nozzle front cover 11a.

[0074] On the one hand, by setting the overall profile of the nozzle front cover 11a to be conical, when the nozzle A is used, the nozzle front cover 11a or at least a portion of the nozzle head 11 can be easily extended into the oral cavity, so that the cavitation rotating water flow ejected from the third channel 10c is aimed at the cleaned parts, such as tooth surfaces, tooth gaps, gums, etc. In specific implementation, the outer diameter of the nozzle front cover 11a can be controlled between 2mm and 4mm to provide a suitable setting space for the third channel 10c to avoid reducing the swirl effect.

[0075] On the other hand, when the nozzle front cover 11a is arranged to seal the assembly opening surrounded by the nozzle surrounding wall 11c, the conical cavity of the nozzle front cover 11a can naturally form a focusing cavity b of the second channel 11b; it can also be understood that the third channel 10c and the focusing cavity b are arranged to pass through the nozzle front cover 11a along the geometric center line of the nozzle front cover 11a.

[0076] Of course, in the embodiment where the focusing chamber b is omitted, the side of the nozzle front cover 11a facing the nozzle rear cover 11b may also be set to other structural forms, such as a planar structure; and the third channel 10c is set through the nozzle front cover 11a.

[0077] In one embodiment, see Figure 3 , Figure 4 and Figure 6 The swirl element 20 also has a diffuser 22, which is arranged at one end of the swirl portion 21 along the axial direction of the swirl chamber a and arranged in the focusing chamber b; the contour shape of the diffuser 22 is set to be substantially the same as the contour shape of the focusing chamber b, that is, the cross-sectional area of ​​the diffuser 22 gradually decreases from the end of the diffuser 22 close to the swirl portion 21 to the end away from the swirl portion 21; at the same time, a plurality of (for example, two, three or other greater numbers) diffusion channels 20a are provided on the diffuser 22, and the diffusion channels 20a are arranged to penetrate the diffuser 22 in the axial direction of the swirl chamber a, and the plurality of diffusion channels 20a are evenly or unevenly spaced around the fluid inlet of the third channel 10c.

[0078] In the process of the swirl portion 21 guiding the fluid medium or water flow in the swirl chamber a to flow through the diffusion portion 22 toward the third channel 10c in the form of a spiral diffusion flow, the spiral water flow can be divided into multiple water flows with the help of the diffusion channel 20a, thereby increasing the spiral effect of the rotating water flow ejected from the third channel 10c or the nozzle A.

[0079] In specific implementation, the diffusion channel 20a can be arranged in an inclined shape in the axial direction of the swirl chamber a, and the inclination direction of the diffusion channel 20a is the same as the direction in which the swirl portion 21 guides the fluid medium to flow in a spiral diffusion manner, so that the direction of the water flow spiral can be kept consistent, thereby enhancing the spiral effect of the water flow. Of course, the inclination direction of the diffusion channel 20a can also be opposite to the direction of the water flow spiral flow in the swirl chamber a, so that the water flow can form more dispersed multiple streams when flowing out of the third channel 10c, reducing the spiral influence between the streams, so that the rotating water flow ejected from the nozzle A has a larger and more angle.

[0080] At the same time, in the axial direction of the vortex chamber a, a gap is provided between the circumferential surface of the diffuser 22 and the cavity wall of the focusing cavity b, that is, there is a preset gap between the two; thus, the water flow through the diffuser channel 20a can be smoothly guided and gathered in the third flow channel 10c based on the shape matching relationship between the diffuser 22 and the focusing cavity b, thereby achieving the effect of increasing the water pressure of the water outlet.

[0081] In addition, regarding the structural dimensions of the diffuser channel 20a itself, please refer to Figure 6 , the width D1 of the diffusion channel 20a can be controlled between 0.5mm-1.5mm, the length L1 of the diffusion channel 20a in the extension direction of the cavity wall of the focusing cavity b can be controlled between 1.5mm-5.0mm, and the inclination angle or diffusion angle of the diffusion channel 20a can be controlled between 0°-60°. In this way, the spiral effect of the spiral water flow can be guaranteed, and the deterioration of the water flow inlet experience and the generation of a large pressure drop can be avoided. In other words, the longer the length L1 of the diffusion channel 20a and the larger the diffusion angle, the better the spiral effect is often. However, if the length L1 is too long and the diffusion angle is too large, the inlet experience will be reduced and a large pressure drop will be generated.

[0082] In one embodiment, see Figure 3 , Figure 4 and Figure 6 The swirl member 20 also has a flow blocking portion 23, which is arranged in the swirl chamber a and is disposed at one end of the swirl portion 21 away from the diffuser 22; in the axial direction of the swirl chamber a, the flow blocking portion 23 and the diffuser 22 are located on both sides of the fluid outlet of the first channel 10a. In specific implementation, the cross-sectional area of ​​the flow blocking portion 23 and the maximum cross-sectional area of ​​the diffuser 22 are both set to be larger than the cross-sectional area of ​​the swirl portion 21.

[0083] For example, the swirl portion 21 can adopt a circular cylindrical structure, and the baffle portion 23 can adopt a circular disc structure, that is, the areas of any two cross sections of the swirl portion 21 are equivalent, and the areas of any two cross sections of the baffle portion 23 are equal; accordingly, the swirl chamber a can adopt a cylindrical cavity structure, that is, the cavity wall of the swirl chamber a, the circumferential surface of the swirl portion 21 and the baffle portion 23 are all smooth curved surface structures; wherein, the outer diameter of the baffle portion 23 and the maximum outer diameter of the diffuser 22 can be set to be close to or equal to the inner diameter of the swirl chamber a.

[0084] Therefore, by means of the size relationship between the blocking portion 23 and the cavity wall of the swirl chamber a, and the relative position relationship between the blocking portion 23, the diffuser 22 and the fluid outlet of the first channel 10a, the blocking portion 23 can be used to form a blocking surface to prevent the fluid medium or water flow in the swirl chamber a from flowing in a direction away from the third channel 10c, thereby reducing the pressure loss of the water flow in the nozzle A and providing support for increasing the impact force of the rotating water flow ejected from the nozzle A.

[0085] In other embodiments, the flow blocking portion 23, the swirl portion 21 and the swirl chamber a may also adopt other structural forms. For example, the contour shape of the cross section is a polygon such as a rectangle. Correspondingly, the contour shape of the focusing chamber b and the diffusion portion 22 can be set to a pyramid shape. All these will not be elaborated here.

[0086] See also Figure 3 and Figure 4 In the embodiment where the swirl member 20 has a swirl portion 21, a diffuser portion 22 and a baffle portion 23, the swirl member 20 can be configured as an integrated structure with the nozzle rear cover 11b, that is, the nozzle rear cover 11b is fixedly disposed on or formed on a side of the baffle portion 23 away from the swirl portion 21, and by utilizing the size difference between the baffle portion 23 and the nozzle rear cover 11b, the nozzle rear cover 11b can be abutted against the end face of the nozzle surrounding wall 11c (that is, the end face of the assembly port) to encapsulate and fix the swirl member 20 in the second channel 10b, thereby creating conditions for rapid assembly and molding of the nozzle A.

[0087] Of course, the swirl member 20 can also be fixed on the nozzle rear cover 11b or the nozzle surrounding wall 11c based on the flow blocking portion 23 by bonding, clamping, etc.

[0088] In one embodiment, see Figures 8 to 10, the diffusion channel 20a can also be arranged on the cavity wall of the focusing chamber b, that is, the diffusion channel 20a extends from one end of the focusing chamber b close to the third channel 10c to one end close to the swirl chamber a and is arranged on the cavity wall of the focusing chamber b, and multiple diffusion channels 20a are evenly or spaced around the fluid inlet of the third channel 10c; at this time, the swirl element 20 can be equipped with a diffusion portion 22, or the diffusion portion 22 can be omitted; by transferring the diffusion channel 20a to the cavity wall of the focusing chamber b or the nozzle front cover 11a, the spiral water flow from the swirl chamber a can also be divided into multiple water flows, and finally the multiple spiral water flows are ejected from the third channel 10c or the nozzle A.

[0089] See also Fig.11 and Fig.12 In the embodiment where the diffuser 22 is omitted from the swirl member 20, the swirl portion 21 may adopt an impeller structure; that is, the swirl member 20 or the swirl portion 21 includes a pivot shaft and a plurality of blades arranged around the pivot shaft, and the swirl member 20 or the swirl portion 21 is rotatably arranged in the second channel 10b via the pivot shaft (for example, one end of the pivot shaft 21 is rotatably connected to the nozzle front cover 11a, and the other end is rotatably connected to the nozzle rear cover 11b).

[0090] For specific implementation, please refer to Fig. 9 One of the nozzle front cover 11a and the nozzle rear cover 11b can be set as an integrated structure with the nozzle surrounding wall 11c and the spray rod part 12, and the other of the nozzle front cover 11a and the nozzle rear cover 11b can restrict the swirl member 21 in the second channel 10b in a rotatable form by sealing the assembly opening of the nozzle surrounding wall 11c; thereby providing structural support for the rapid disassembly and assembly of the swirl member 21.

[0091] Thus, the water flow entering the swirl chamber a with a certain pressure can impact the fan blades, thereby causing the swirl portion 21 or the swirl element 20 to rotate in the second channel 10b with the axis of the third channel 10c as the axis of rotation, and the rotation of the swirl portion 21 can in turn guide the fluid medium or water flow in the swirl chamber a to flow toward the third channel 10c for spiral diffusion. Accordingly, under the premise that the diffusion channel 20a is arranged in the focusing chamber b, the spiral water flow formed by the swirl portion 20 based on the impeller structure can be divided into multiple water flows and gathered in the third channel 10c.

[0092] Of course, in the embodiment where the swirl portion 21 adopts an impeller structure, the focusing chamber b or the diffusion channel 20a may be omitted; no further details are given here.

[0093] See also Fig. 9 , Fig.11 and Fig.12In the embodiment where the swirl portion 21 adopts an impeller structure, a blocking portion 23 may also be configured in the swirl member 20. The blocking portion 23 is arranged at the end of the pivot shaft away from the nozzle front cover 11a and is integrated with the fan blade; thereby, the blocking portion 23 is used to form a blocking surface at the end of the impeller structure away from the third channel 10c to prevent the fluid medium or water flow in the swirl chamber a from flowing in a direction away from the third flow channel 10c, thereby reducing the water flow pressure loss.

[0094] In one embodiment, see Figure 1 and Figure 7 The spray bar portion 12 has a mounting section 12a, a bending section 12b and a connecting section 12c which are sequentially arranged along the length direction thereof. It can be understood that the mounting section 12a, the bending section 12b and the connecting section 12c are equivalent to the three parts formed by dividing the spray bar portion 12 according to the functions or structural characteristics along the length direction of the spray bar portion 12; wherein, one end of the mounting section 12a away from the bending section 12b is equivalent to the fluid inlet end of the nozzle A, which is used to connect the fluid source (specifically, the pump body in the body B); and one end of the connecting section 12c away from the bending section 12b is equivalent to the fluid outlet end of the first channel 10a, which is used to connect the spray head 11 at the nozzle wall 11c or from the tangential direction of the swirl chamber a; and the bending section 12b is used to adjust the extension direction or length direction of the entire spray bar portion 12, so that the first channel 10a can be connected with the swirl chamber a along the tangential direction of the swirl chamber a.

[0095] In specific implementation, the axis line of the mounting segment 12a is coplanar with the geometric center line of the nozzle front cover 11a or the axis line of the third channel 10c; thereby, the entrance experience of the nozzle A and the overall operability of the oral cleaning device can be effectively improved, that is: when the oral cleaning device is used, based on the connection relationship between the mounting segment 12a and the body B, and the relative position relationship between the mounting segment 12a and the nozzle front cover 11a, the user can adjust the position of the fluid outlet of the nozzle A in the oral cavity by controlling the spatial position of the body B, so that the cleaning water flow can be accurately aimed at the part to be cleaned, thereby enhancing the user experience.

[0096] It should be noted that Figure 1 and Figure 7 The bold dashed line in FIG. 1 only represents the approximate boundary between the mounting section 12a, the bending section 12b and the connecting section 12c. Figure 1 and Figure 7 The dot-dash line in represents the axial center line of the mounting section 12a and the geometric center line of the nozzle front cover 11a.

[0097] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A nozzle, characterized in that: For an oral cleaning device, the nozzle comprises a nozzle member and a swirl member, a first channel, a second channel and a third channel are formed inside the nozzle member, the second channel has a swirl chamber, the first channel is connected to the swirl chamber along the tangential or radial direction of the swirl chamber, the third channel is connected to the second channel along the axial direction of the swirl chamber, and the minimum cross-sectional area of ​​the swirl chamber is greater than the maximum cross-sectional area of ​​the first channel and the maximum cross-sectional area of ​​the third channel; The swirl member is arranged in the second channel, and the swirl member has a swirl portion arranged in the swirl cavity along the axial direction of the swirl cavity; the swirl portion is used to guide the fluid medium entering the swirl cavity through the first channel to flow in a spiral diffusion flow and flow to the third channel.

2. The nozzle according to claim 1, characterized in that The second channel also has a focusing chamber, which is arranged between the third channel and the vortex chamber along the axial direction of the vortex chamber, and the cross-sectional area of ​​the focusing chamber gradually decreases from one end of the focusing chamber close to the vortex chamber to one end close to the third channel.

3. The nozzle according to claim 2, characterized in that The swirl component also has a diffuser arranged in the focusing cavity, the diffuser is set at one end of the swirl portion, and the cross-sectional area of ​​the diffuser gradually decreases from the end of the diffuser close to the swirl portion to the end away from the swirl portion; the diffuser has a plurality of diffuser flow channels, the diffuser flow channels are set through the diffuser, and the plurality of diffuser flow channels are arranged at intervals around the fluid inlet of the third channel.

4. The nozzle according to claim 3, characterized in that The swirl component also has a flow blocking portion arranged in the swirl chamber, and the flow blocking portion is arranged at one end of the swirl portion away from the diffuser; in the axial direction of the swirl chamber, the flow blocking portion and the diffuser are located on both sides of the fluid outlet of the first channel; the flow blocking portion is used to prevent the fluid medium in the swirl chamber from flowing in a direction away from the third channel.

5. The nozzle according to claim 4, characterized in that The areas of any two cross sections of the swirl portion are equal, the areas of any two cross sections of the swirl chamber are equal, and the cross-sectional area of ​​the flow blocking portion and the maximum cross-sectional area of ​​the diffuser portion are both greater than the cross-sectional area of ​​the swirl portion.

6. The nozzle according to claim 5, characterized in that The peripheral surface of the swirl portion and the cavity wall of the swirl cavity are both smooth curved surface structures.

7. The nozzle according to claim 4, characterized in that In the axial direction of the swirl chamber, a preset gap is provided between the diffuser and the chamber wall of the focusing chamber.

8. The nozzle according to claim 2, characterized in that A plurality of diffusion channels are arranged on the cavity wall of the focusing cavity. The diffusion channels extend from one end of the focusing cavity close to the third channel to one end close to the swirl cavity. The plurality of diffusion channels are arranged at intervals around the fluid inlet of the third channel.

9. The nozzle according to claim 8, characterized in that The swirl part is an impeller structure; the swirl part can rotate in the swirl chamber with the axis of the third channel as the rotation axis.

10. The nozzle according to claim 9, characterized in that The swirl component also has a flow blocking portion arranged in the swirl chamber, and the flow blocking portion is set at one end of the swirl portion; in the axial direction of the swirl chamber, the fluid inlet of the third channel and the flow blocking portion are located on both sides of the fluid outlet of the first channel; the flow blocking portion is used to prevent the fluid medium in the swirl chamber from flowing in a direction away from the third channel.

11. The nozzle according to claim 9, characterized in that The areas of any two cross sections of the cyclone chamber are equal, and / or the chamber wall of the cyclone chamber is a smooth curved surface structure.

12. The nozzle according to any one of claims 4 to 11, characterized in that The diffusion channel is arranged in an inclined shape in the axial direction of the cyclone chamber, and the inclination direction of the diffusion channel is the same as or opposite to the direction in which the cyclone portion guides the fluid medium to flow in a spiral diffusion manner.

13. The nozzle according to claim 12, characterized in that The width of the diffusion channel is between 0.5 mm and 1.5 mm, the length of the diffusion channel in the extension direction of the cavity wall of the focusing cavity is between 1.5 and 5.0, and the inclination angle of the diffusion channel is between 0° and 60°.

14. The nozzle according to any one of claims 1 to 11, characterized in that The nozzle part comprises a nozzle head and a spray bar, wherein the nozzle head comprises a nozzle front cover, a nozzle rear cover and a nozzle surrounding wall; wherein: The nozzle front cover and the nozzle rear cover are arranged opposite to each other with a distance, and the third channel is arranged on the nozzle front cover along the geometric center line of the nozzle front cover; the nozzle surrounding wall is arranged between the nozzle front cover and the nozzle rear cover to enclose the nozzle front cover and the nozzle rear cover to form the second channel; One end of the spray bar portion in the length direction is connected to the spray head portion at the nozzle surrounding wall; the first channel is arranged through the spray bar portion along the length direction of the spray bar portion and is connected to the swirl chamber at the nozzle surrounding wall.

15. The nozzle according to claim 14, characterized in that One of the nozzle front cover and the nozzle rear cover is an integral structure with the nozzle wall and the spray rod portion; the other of the nozzle front cover and the nozzle rear cover is provided to cover the assembly opening formed by the nozzle wall to confine the swirl member within the second channel.

16. The nozzle according to claim 14, characterized in that The spray bar portion has a mounting section, a bending section and a connecting section arranged in sequence along its length direction; an end of the mounting section away from the bending section is used to connect to a fluid source, and an end of the connecting section away from the bending section is connected to the spray head portion at the nozzle wall; an axial centerline of the mounting section is coplanar with a geometric centerline of the nozzle front cover.

17. The nozzle according to claim 14, characterized in that The cross-sectional area of ​​the nozzle front cover gradually decreases from a side of the nozzle front cover facing the nozzle rear cover toward a side facing away from the nozzle rear cover.

18. The nozzle according to any one of claims 1 to 11, characterized in that The cross-sectional area of ​​the third channel gradually increases from an end of the third channel close to the second channel toward an end of the third channel far from the second channel.

19. The nozzle according to claim 18, characterized in that The maximum cross-sectional area of ​​the third channel is less than 3 square millimeters.

20. The nozzle according to any one of claims 1 to 11, characterized in that The ratio of the minimum cross-sectional area of ​​the swirl chamber to the maximum cross-sectional area of ​​the first channel is between 1.5 and 4.

21. An oral cleaning device, characterized in that: It comprises a pump body and a nozzle as described in any one of claims 1 to 20, wherein the nozzle is connected to the pump body.

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