Nozzle, tooth cleaning equipment and machining method

Abstract

The invention discloses a nozzle, tooth cleaning equipment and a processing method, the nozzle comprises a conduit, an inclined part and a bent pipe, one end of the conduit is provided with a first inclined surface and a second inclined surface which are intersected, and a groove is limited between the first inclined surface and the second inclined surface; the inclined part and the guide pipe are integrally formed and matched in the groove, the edge of the inclined part is connected with the first inclined face and the second inclined face in a sealed mode, and a spraying hole is formed in the inclined part and communicated with an inner cavity of the guide pipe. The bent pipe and the guide pipe are integrally formed, the bent pipe is connected with the other end of the guide pipe, the bent pipe comprises a plurality of pipe sections, the pipe sections and the guide pipe are connected through male connectors and female connectors, every two adjacent pipe sections are connected through the male connectors and the female connectors, and the male connectors and the female connectors are rotationally assembled so that the bent pipe can be bent and deformed. The nozzle is small in size, the preset shape and direction of fluid can be effectively controlled, and the bent pipe can be bent and adjusted according to needs, so that the spraying direction of the nozzle can be conveniently adjusted, and the consistency of nozzle forming is good.

Description

Technical Field

[0001] The present invention relates to the technical field of nozzles, and in particular, to a nozzle, a dental cleaning device including the nozzle, and a processing method of the nozzle. Background Art

[0002] A nozzle is a component that sprays a fluid in a preset form, and is widely used in industrial production equipment, medical treatment, household products and other fields. Taking the field of health care as an example, nozzles are often used for internal flushing, spraying medicine, etc. For example, before using an endoscope to examine the stomach, it is necessary to first use a nozzle to locally spray anesthetic on the parts that are prone to stress reactions such as nausea (such as the epiglottis of the throat). When using an endoscope to examine the stomach, it is also necessary to use a nozzle to clean the gastric mucus, etc.

[0003] In recent years, intelligent control technology has been widely used in the field of health care. An intelligent dental cleaning device is an oral device that can accurately and efficiently clean each surface and gap of teeth under the guidance of machine vision. When using an intelligent dental cleaning device, it is necessary to use a nozzle to achieve operations such as flushing and spraying medicine. However, the nozzles in the related technology have the following problems:

[0004] 1) The nozzle has a large volume, and the edges and corners of the nozzle are likely to cause irritation to the internal cavity and pipeline of the body; 2) The preset shape, direction, etc. of the fluid sprayed by the nozzle cannot be effectively controlled within the preset range; 3) The consistency of nozzle production and processing is low; 4) When operating in a narrow space, it is not easy for the robotic arm to control the nozzle to change the spraying direction; 5) Due to the small radius of the nozzle, the wall thickness factor in the processing of an integrally formed nozzle cannot be ignored. Due to the wall thickness, after the inclined part is bent, it cannot be closely attached to the catheter. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the related technology to some extent.

[0006] To this end, an embodiment of the present invention provides a nozzle, which has a small volume and high comfort when operating in the internal cavity of the body; has high processing accuracy, so that the preset shape and direction of the fluid sprayed by the nozzle can be effectively controlled, and the bendable bent tube can be bent and adjusted as needed, thus facilitating the adjustment of the spraying direction and spraying position of the nozzle; the nozzle can be formed by laser cutting of pipes and the like, and the forming consistency is good. Considering that the ratio of the wall thickness to the radius is large, the laser cutting drawing is corrected correspondingly to ensure that the inclined part is closely attached to the catheter.

[0007] An embodiment of the present invention also provides a dental cleaning device including the above-mentioned nozzle.

[0008] The embodiment of the present invention also proposes a processing method based on the above nozzle, which uses laser cutting technology to cut a round tube made of metal or other materials, with the characteristics of high precision and good repeatability, and the nozzle formed on this basis has good consistency. In addition, the above processing method has low cost and is easy to mass produce.

[0009] The nozzle of the embodiment of the present invention comprises:

[0010] A conduit, wherein one end of the conduit is provided with a first inclined surface and a second inclined surface arranged to intersect each other, and a groove is defined between the first inclined surface and the second inclined surface;

[0011] An inclined portion is integrally formed with the conduit and fits in the groove, an edge of the inclined portion is sealed and connected to both the first inclined surface and the second inclined surface to block the port of the conduit, and a spray hole is provided on the inclined portion, and the spray hole is connected to the inner cavity of the conduit.

[0012] The nozzle of the embodiment of the present invention has a small volume, the preset shape and direction of the fluid can be effectively controlled, and the bending tube can also be bent and adjusted as needed, thereby facilitating the adjustment of the nozzle spray direction. The nozzle can be formed by laser cutting of pipes, etc., and the forming consistency is good.

[0013] In some embodiments, the nozzle includes a bent tube, which is integrally formed with the catheter and connected to the other end of the catheter. The bent tube includes multiple pipe segments, and the pipe segments and the catheter and two adjacent pipe segments are connected by male connectors and female connectors. The male connector and the female connector are rotatably assembled to allow the bent tube to bend and deform.

[0014] In some embodiments, a connecting portion is provided between the inclined portion and the conduit, the connecting portion is connected to the first inclined surface, and the inclined portion is fitted with the conduit through the bending of the connecting portion.

[0015] In some embodiments, the spray hole includes a first hole, a second hole and a gap, the gap is connected between the first hole and the second hole, and the sides of the first hole, the second hole and the gap are perpendicular to the outer wall of the inclined portion, and the sizes of the first hole, the second hole and the gap gradually increase from the inside to the outside.

[0016] In some embodiments, a flexible tube is included, wherein the flexible tube is sleeved on the outer peripheral side of the curved tube, one end of the flexible tube is sealedly connected to the catheter, and the other end of the flexible tube is sealedly connected to the end of the curved tube away from the catheter, all of the male connectors and the female connectors are located in the flexible tube, the flexible tube can be flexibly deformed, and the flexible tube is used to achieve a waterproof seal for the curved tube.

[0017] In some embodiments, there are two tightening members, both of which are sleeved on the outer peripheral side of the flexible tube. One of the tightening members is used to tightly fix one end of the flexible tube to the conduit, and the other tightening member is used to tightly fix the other end of the flexible tube to the bent tube.

[0018] In some embodiments, the male connector includes two first protruding portions, both of which are arc-shaped, and a first arc-shaped groove is defined between each first protruding portion and the pipe section. A circular groove is defined between the two first protruding portions, and the two first arc-shaped grooves are concentrically arranged with the circular groove;

[0019] The female connector includes an intermediate protruding portion and two second protruding portions. The intermediate protruding portion is located between the two second protruding portions, and a second arc-shaped groove is defined between each second protruding portion and the intermediate protruding portion. The two second arc-shaped grooves are concentrically arranged with the circular groove;

[0020] The intermediate protruding portion is pivotally fitted in the circular groove, the two second protruding portions are correspondingly and slidably fitted in the two first arc-shaped grooves, and the two first protruding portions are correspondingly and slidably fitted in the two second arc-shaped grooves.

[0021] The dental cleaning device according to an embodiment of the present invention includes the nozzle described in any one of the above embodiments.

[0022] The processing method of the nozzle according to an embodiment of the present invention includes the following steps:

[0023] Set the inner diameter φ, wall thickness h, and spraying direction θ of the nozzle, and accordingly select a circular tube with an inner diameter of φ and a wall thickness of h, where θ is the angle between the fluid sprayed by the nozzle and the central axis of the conduit;

[0024] Calculate the mating curve at the inner walls of the conduit and the inclined portion by combining the cylindrical surface equations of two cylinders with a diameter of φ and a central axis angle of θ, and then respectively obtain the outer wall mating curves of the conduit and the inclined portion through the perpendicular mapping of the mating curve at the inner wall to the outer wall. Splice the outer wall mating curves of the conduit and the inclined portion and the spray hole curve to obtain a cutting route map;

[0025] Cut the tube wall of the circular tube along the cutting route map to obtain the inclined portion and the conduit;

[0026] Mate the inclined portion and the conduit along the inner wall, and seal the mated part.

[0027] In some embodiments, a communication area is provided between the outer wall mating curves of the conduit and the inclined portion. The communication area forms a connecting portion after cutting, and the connecting portion is bent so that the inclined portion and the conduit cooperate with each other.

[0028] In some embodiments, a convex curve and a fixing buckle curve are respectively arranged on the mating curves of the outer walls of the catheter and the inclined part. After cutting, the convex curve and the fixing buckle curve cooperate with each other to assist the alignment of the inclined part and the catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a side view of the nozzle according to an embodiment of the present invention.

[0030] Figure 2 is a side view of the inclined part according to an embodiment of the present invention.

[0031] Figure 3 is a top view of the inclined part according to an embodiment of the present invention.

[0032] Figure 4 is a cross-sectional view of the inclined part at the spray hole according to an embodiment of the present invention.

[0033] Figure 5 is a schematic diagram of the bent pipe, flexible pipe and tightening member according to an embodiment of the present invention.

[0034] Figure 6 is a schematic diagram of the male connector and female connector according to an embodiment of the present invention.

[0035] Figure 7 is a schematic diagram of the reserved groove on the bent pipe according to an embodiment of the present invention.

[0036] Figure 8 is a schematic diagram of the intersection of the first cylindrical surface and the second cylindrical surface during the processing of the nozzle according to an embodiment of the present invention.

[0037] Figure 9 is a schematic diagram of the intersection line of the first cylindrical surface and the second cylindrical surface during the processing of the nozzle according to an embodiment of the present invention.

[0038] Figure 10 is a longitudinal sectional view of the catheter according to an embodiment of the present invention.

[0039] Figure 11 is a three-dimensional side view of the catheter according to an embodiment of the present invention.

[0040] Figure 12 is a schematic diagram of the cutting route during the processing of the nozzle and the bent pipe according to an embodiment of the present invention Figure 1 。

[0041] Figure 13 is a schematic diagram of the cutting route during the processing of the nozzle and the bent pipe according to an embodiment of the present invention Figure 2 。

[0042] Figure 14Schematic diagram of the cutting route plane of the inclined part and the catheter according to the embodiment of the present invention Figure 1 。

[0043] Figure 15 It is a side view of the inclined part and the catheter according to the embodiment of the present invention.

[0044] Figure 16 Schematic diagram of the cutting route plane of the inclined part and the catheter according to the embodiment of the present invention Figure 2 。

[0045] Figure 17 Schematic diagram of the cutting route plane of the inclined part and the catheter according to the embodiment of the present invention Figure 3 。

[0046] Reference numerals:

[0047] Catheter 1; first inclined plane 11; second inclined plane 12; fixing buckle 13;

[0048] Inclined part 2; spray hole 21; first hole 211; second hole 212; gap 213; edge correction 22; protrusion 23;

[0049] Bending pipe 3; pipe section 31; male joint 32; first protruding part 321; first arc-shaped groove 322; round groove 323; female joint 33; intermediate protruding part 331; second protruding part 332; second arc-shaped groove 333; reserved groove 34;

[0050] Connecting part 4;

[0051] Flexible pipe 5;

[0052] Tightening member 6. Detailed implementation manners

[0053] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0054] The nozzle according to the embodiment of the present invention includes a catheter 1, an inclined part 2 and a bending pipe 3. As Figure 1 shown, both the catheter 1 and the bending pipe 3 are tubular structures, specifically, they can be circular pipe structures. The inclined part 2 can be arranged at the left end of the catheter 1, and the bending pipe 3 can be connected to the right end of the catheter 1.

[0055] The left end of the catheter 1 is provided with a first inclined surface 11 and a second inclined surface 12 arranged intersectingly, and both the first inclined surface 11 and the second inclined surface 12 are inclined cutting surfaces. The inclined cutting surface is obtained by cutting the tube wall of the catheter 1, and the cutting technology can adopt laser cutting, and the laser cutting direction can be perpendicular to the outer wall of the circular tube. Among them, the first inclined surface 11 is generally inclined and arranged along the direction from the upper left to the lower right, and the second inclined surface 12 is generally inclined and arranged along the direction from the lower left to the upper right. A groove is defined between the first inclined surface 11 and the second inclined surface 12. As Figure 1 shown, the groove is generally a V-shaped groove, and the notch of the groove faces left.

[0056] The inclined part 2 can generally be in the shape of an arc-shaped plate and is fitted to the left side of the above-mentioned groove. The inclined part 2 is integrally formed with the catheter 1. For example, the right end of the inclined part 2 can be integrally connected and bent with the front end of the catheter 1. After bending, the inclined part 2 is embedded in the groove, and the inclined part 2 is connected to the inner wall edge of the catheter 1. As Figure 1 shown, this can ensure the smooth flow of the fluid passing through the catheter 1. Further, the corresponding edges of the inclined part 2 are hermetically connected to the first inclined surface 11 and the second inclined surface 12 respectively. For example, the corresponding edges of the inclined part 2 can be fixedly welded to the first inclined surface 11 and the second inclined surface 12 by welding. Thus, the inclined part 2 can seal the front end port of the catheter 1.

[0057] The inclined part 2 is provided with a spray hole 21, and the spray hole 21 can penetrate the inclined part 2 along the thickness direction of the inclined part 2. There can be only one spray hole 21, and in some other embodiments, there can also be multiple spray holes 21.

[0058] During use, fluids such as cleaning liquid and medicine can be conveyed through the catheter 1. Due to the blocking and limiting of the inclined part 2, the fluid can only be ejected from the spray hole 21, and the constraint of the spray hole 21 can enable the fluid to be ejected in a preset form, thus meeting the in-vivo cleaning care, etc.

[0059] The bent tube 3 can be made of soft rubber or silicone tube, or can be integrally formed with the conduit 1. For example, the bent tube 3 and the conduit 1 can be formed by cutting a single round tube, and a flexible material is used to seal the gaps generated by the cutting. The bent tube 3 includes a plurality of tube segments 31, and the plurality of tube segments 31 can be sequentially connected in the left-right direction. Between the tube segment 31 and the conduit 1, and between two adjacent tube segments 31, they are connected by a male joint 32 and a female joint 33. For example, the male joint 32 can be integrally formed on one of the two adjacent tube segments 31, and the female joint 33 can be integrally formed on the other. The male joint 32 and the female joint 33 are rotationally assembled. Thus, relative swinging adjustment can be achieved between two adjacent tube segments 31, and further, the bending deformation adjustment of the bent tube 3 can be realized. By the bending deformation of the bent tube 3, the orientation and angle of the spray hole 21 can be adjusted, facilitating the cleaning and nursing of different parts, etc.

[0060] Each part of the nozzle in the embodiment of the present invention is integrally processed and formed by a metal round tube or the like. After forming, the volume is small and there are no sharp corners, reducing the irritation to the internal cavity and pipeline in the body. Secondly, the preset shape and direction of the fluid can be effectively controlled. In addition, the bent tube 3 has strong anti-pulling property in the radial direction and can be bent around the male joint in a fixed direction. Therefore, it can be bent and adjusted as needed, thus facilitating the adjustment of the spraying direction and position of the nozzle. Moreover, the nozzle can be formed by laser cutting of pipes and the like, and the forming consistency is good.

[0061] In some embodiments, as Figure 1 shown, a connecting portion 4 is provided between the inclined portion 2 and the conduit 1. The angle between the first inclined surface 11 and the axis of the conduit 1 is greater than the angle between the second inclined surface 12 and the axis of the conduit 1. The connecting portion 4 is connected to the first inclined surface 11, and the inclined portion 2 is attached to the conduit 1 through the bending of the connecting portion 4.

[0062] The setting of the connecting portion 4 enables the inclined portion 2 and the conduit 1 to be integrally formed on the one hand, and also facilitates the installation and positioning of the inclined portion 2 and the conduit 1. That is, a certain degree of pre-positioning of the inclined portion 2 and the conduit 1 can be achieved through the bending of the connecting portion 4, thus providing convenience for subsequent processing.

[0063] In some embodiments, the spray hole 21 includes a first hole 211, a second hole 212, and a gap 213. The gap 213 is connected between the first hole 211 and the second hole 212, and the sides of the first hole, the second hole, and the gap are perpendicular to the outer wall of the inclined portion, and the sizes of the first hole, the second hole, and the gap gradually increase from the inside to the outside.

[0064] In some embodiments, the aperture diameter of the first hole 211 is not less than the width dimension of the gap 213, and the aperture diameter of the second hole 212 is not less than the width dimension of the gap 213.

[0065] For example, Figures 2 to 4 As shown, the first hole 211 and the second hole 212 can be substantially circular holes, and the first hole 211 and the second hole 212 are arranged at intervals in the width direction of the inclined portion 2. The slit 213 can be a long hole, and the slit 213 extends along the width direction (front-rear direction) of the inclined portion 2, one end of the slit 213 is connected to the first hole 211, and the other end of the slit 213 is connected to the second hole 212, and the spray hole 21 formed by the first hole 211, the second hole 212 and the slit 213 is arranged in mirror symmetry.

[0066] The width dimension of the slit 213 is the dimension of the slit 213 in the left-right direction. The aperture of the first hole 211 may be the same as the aperture of the second hole 212, and the width dimension of the slit 213 is smaller than the aperture of the first hole 211 (the second hole 212). Figure 4 As shown, since the inclined portion 2 has a certain curvature, the first hole 211, the gap 213, and the second hole 212 also form a fan-shaped hole as a whole. Therefore, the fluid will present a fan-shaped shape after being sprayed out through the spray hole 21, which can not only expand the spray range, but also accelerate the spraying of the fluid, thereby ensuring the effect of cleaning, care, etc.

[0067] Optionally, the diameters of the first hole 211 and the second hole 212 may both be 0.3 mm, the center distance between the first hole 211 and the second hole 212 may be 0.65 mm, and the width of the gap 213 may be 0.1 mm.

[0068] In some embodiments, the nozzle includes a flexible tube 5 for sealing the round tube formed by cutting. The flexible tube 5 is sleeved on the outer peripheral side of the curved tube 3, one end of the flexible tube 5 is sealed and connected to the conduit 1, and the other end of the flexible tube 5 is sealed and connected to the end of the curved tube 3 away from the conduit 1, all the male connectors 32 and the female connectors 33 are located in the flexible tube 5, the flexible tube 5 can be flexibly deformed, and the flexible tube 5 is used to achieve waterproof sealing of the curved tube 3.

[0069] For example, Figure 5 As shown, the flexible tube 5 can be a silicone tube, the left end of the flexible tube 5 can be sleeved on the outer peripheral side of the catheter 1 and sealed and fixed to the outer peripheral wall of the catheter 1, and the right end of the flexible tube 5 can be sleeved on the outer peripheral side of the rightmost pipe section 31 and sealed and fixed to the outer peripheral wall of the pipe section 31.

[0070] The male connector 32 and the female connector 33 between the catheter 1 and the frontmost pipe section 31, and the male connector 32 and the female connector 33 between any two adjacent pipe sections 31 can all be covered in the flexible tube 5. When in use, the flexible tube 5 can be bent and deformed along with the deformation of the curved tube 3, so that the flexible tube 5 can adapt to the bending change adjustment of the curved tube 3.

[0071] Secondly, the flexible tube 5 can cover all the gaps between the male connectors 32 and the female connectors 33, thereby achieving the waterproof sealing of the bent tube 3 and avoiding the situation where the fluid inside the bent tube 3 or external fluid enters the bent tube 3. Additionally, the flexible tube 5 can be designed to be transparent, facilitating the operator to visually observe the situation inside the flexible tube 5 from the outside, which is beneficial to further improving the convenience of use during the operation process.

[0072] In some other embodiments, the flexible tube 5 can also be made of other materials such as plastics and rubbers.

[0073] Optionally, the outer diameter of the bent tube 3 can be 2.5 mm, and the inner diameter of the flexible tube 5 can be 2 mm. The flexible tube 5 can be press-fitted over the outer peripheral side of the bent tube 3, thereby ensuring the sealed fit between the flexible tube 5 and the bent tube 3, which is beneficial to further ensuring the structural compactness and sealing performance of the assembly.

[0074] In some embodiments, the nozzle includes two clamping members 6, both of which are sleeved on the outer peripheral side of the flexible tube 5. One clamping member 6 is used to tightly fix one end of the flexible tube 5 to the conduit 1, and the other clamping member 6 is used to tightly fix the other end of the flexible tube 5 to the bent tube 3. For example, as Figure 5 shown, the clamping member 6 can specifically be a steel ring, and the clamping member 6 can tightly fix the flexible tube 5 on the outer peripheral side of the conduit 1 or the corresponding pipe section 31, thereby facilitating the sealed fixation of the flexible tube 5 and ensuring the sealing performance of the flexible tube 5 during use.

[0075] In some embodiments, as Figure 6 shown, the male connector 32 includes two first protruding portions 321, both of which are circular arcs and are arranged symmetrically in a mirror image. A circular groove 323 is defined between the two first protruding portions 321. And a first arc-shaped groove 322 is defined between each first protruding portion 321 and the pipe section 31. The two first arc-shaped grooves 322 are respectively located on the outer peripheral side of the corresponding first protruding portion 321. The two first arc-shaped grooves 322 are concentric with the circular groove 323, and the two first arc-shaped grooves 322 and the two first protruding portions 321 are also concentric.

[0076] The female connector 33 includes an intermediate protruding portion 331 and two second protruding portions 332. The intermediate protruding portion 331 is located between the two second protruding portions 332. The intermediate protruding portion 331 can be circular, and both of the two second protruding portions 332 can be arc-shaped. The two second protruding portions 332 are arranged symmetrically in a mirror image with respect to the intermediate protruding portion 331. A second arc-shaped groove 333 is defined between each second protruding portion 332 and the intermediate protruding portion 331. The two second arc-shaped grooves 333 are concentric with the circular groove 323, and the two second protruding portions 332 and the circular groove 323 are also concentric.

[0077] When the male connector 32 and the female connector 33 are assembled, the middle protruding portion 331 is pivotally fitted in the circular groove 323, the two second protruding portions 332 are correspondingly and slidably fitted in the two first arc grooves 322, and the two first protruding portions 321 are correspondingly and slidably fitted in the two second arc grooves 333. When the male connector 32 rotates relative to the female connector 33, the middle protruding portion 331 can rotate in the circular groove 323, the two second protruding portions 332 can slide in the corresponding first arc grooves 322, and the two first protruding portions 321 can slide in the corresponding second arc grooves 333, thus meeting the use requirement of the rotation of the male connector 32 and the female connector 33.

[0078] In some embodiments, one of two adjacent pipe sections 31 is provided with two male connectors 32 symmetrically arranged about the axis of the pipe section 31, and the other is provided with two female connectors 33 symmetrically arranged about the axis of the pipe section 31. When the two adjacent pipe sections 31 rotate relative to each other, the two pairs of male connectors 32 and female connectors 33 can rotate synchronously, thus ensuring the consistency of the adjustment of the forward and backward rotation of the pipe section 31.

[0079] One of two adjacent pipe sections 31 is provided with a reserved groove 34, and the reserved groove 34 is arranged between the two male connectors 32 or the two female connectors 33 of the same pipe section 31, and the reserved groove 34 is used for the other pipe section 31 to be embedded when the two adjacent pipe sections 31 rotate relative to each other to avoid abutting interference.

[0080] For example, as Figure 7 shown, two reserved grooves 34 can be provided on the left side of each pipe section 31, one of the two reserved grooves 34 can be arranged on the front side of the pipe section 31, and the other can be arranged on the rear side of the pipe section 31. When the two adjacent pipe sections 31 perform a relative movement of swinging forward or backward, the reserved groove 34 on the front side or the rear side can play a role in avoiding the pipe section 31, thus avoiding the situation of rotational interference.

[0081] The dental cleaning device according to the embodiment of the present invention will be described below.

[0082] The dental cleaning device according to the embodiment of the present invention includes a nozzle, and the nozzle can be the nozzle described in any of the above embodiments. The dental cleaning device can be a dental irrigator, a dental cleaner, or other dental cleaning devices. In some other embodiments, it can also be other dental cleaning devices that need to use a nozzle.

[0083] The processing method according to the embodiment of the present invention will be described below.

[0084] Aiming at the characteristics of the nozzle, such as small volume, high precision, and good consistency, the processing method according to the embodiment of the present invention includes the following steps:

[0085] S1: Set the inner diameter φ, wall thickness h, and spray direction θ of the nozzle, and select a round tube with an inner diameter of φ and a wall thickness of h. The material of the round tube can be stainless steel, titanium alloy, etc. θ is the acute angle between the nozzle spray fluid and the central axis of the catheter. For example, the angle θ can be 45 degrees, φ is 2 mm, and the wall thickness is 0.25 mm.

[0086] S2: Calculate the laser cutting route of the round tube. Since the two parts, the conduit 1 and the inclined part 2, are cut from the same round tube, and the starting point of the laser cutting is located on the outer wall of the round tube, the direction is perpendicular to the outer wall surface (cylindrical surface), and the laser cutting route is a three-dimensional curve located on the outer wall of the round tube. In order to make the two parts in the shape of round tube walls fit each other, with a small gap and easy welding, sub-step calculation can be used.

[0087] S21: Calculate the matching curves at the inner wall of the conduit 1 and the inclined portion 2 by combining the equations of two cylindrical surfaces with a diameter of φ. The specific calculation process is as follows:

[0088] The first cylindrical surface C1 and the second cylindrical surface C2, both with diameters φ, are arranged to intersect, and the central axes of the two cylindrical surfaces intersect, and the included angle is θ. Figure 8 As shown in the side view, the first cylindrical surface C1 is arranged horizontally from left to right, and the central axis is the dotted line A1; the second cylindrical surface C2 is arranged obliquely from the upper left to the lower right, and the central axis is the dotted line A2.

[0089] The intersection of two cylindrical surfaces is two elliptical curves, such as Figure 9 The dotted line in the middle shows the projection of the elliptic curve. The projection plane is the plane determined by the two lines A1 and A2. The elliptic curve can be obtained by combining the surface equations of C1 and C2. The two elliptic curves intersect at points P1 and P2. Figure 9 In the figure, points P1 and P2 coincide, where P1 is located at the front side of the page and P2 is located at the back side of the page (not marked). P1 and P2 divide the two elliptical curves into four segments, namely the upper right segment curve, the lower right segment curve, the lower left segment curve, and the upper left segment curve. The upper right segment curve and the lower right segment curve are the matching curves of the conduit 1 and the inclined portion 2 at the inner wall.

[0090] The portion of the first cylindrical surface C1 located on the left side of the matching curve can be regarded as the inner wall surface of the catheter 1, such as Figure 10 As shown; the portion of the second cylindrical surface C2 located between the matching curves can be regarded as the inner wall surface of the inclined portion 2.

[0091] S22: Obtain the matching curve on the outer wall by vertically mapping the matching curve at the inner wall to the outer wall. The specific calculation process is as follows:

[0092] Determine multiple inner wall base points arranged at equal intervals on the mating curve. Each base point moves outward by a distance h along the radial direction (i.e., the direction perpendicular to the inner wall surface) of the specified inner wall surface to obtain the corresponding outer wall base points. Connecting the outer wall base points on the outer wall surface can obtain the mating curve on the outer wall. Specifically, when the specified inner wall surface is the inner wall surface of conduit 1, the mating curve on the outer wall of conduit 1 is obtained. The outer wall of the said conduit 1 refers to a cylindrical surface with A1 as the central axis and φ + 2h as the diameter, as shown by the outer wall edge of Figure 11 ; when the specified inner wall surface is the inner wall surface of the inclined part 2, the mating curve on the outer wall of the inclined part 2 is obtained. The outer wall of the said inclined part 2 refers to a cylindrical surface with A2 as the central axis and φ + 2h as the diameter, as shown by the outer wall edge of Figure 2 . To ensure that the outer wall mating curve is smooth enough, the number of base points needs to be sufficient, such as 50, 100, etc.

[0093] S23: Piece together the mating curve on the outer wall, the spray hole curve, etc. to obtain the cutting route map. The specific piecing process is as follows:

[0094] Taking the cylindrical surface with a diameter of φ + 2h as the reference, arrange the outer wall mating curve of the inclined part 2 and the outer wall mating curve of conduit 1 from left to right, and set the spray hole curve in the middle of the outer wall of the inclined part 2. Among them, the spray hole curve is determined according to the preset spraying pattern of the nozzle. For example, for the spraying fluid with a preset spraying pattern of a cylinder with a diameter of 0.3, a cylinder with a diameter of 0.3 can be used to intersect the inclined part perpendicularly, and the resulting intersection line is the spray hole curve.

[0095] In some embodiments, the cutting route map further includes the cutting route of the bent pipe 3, so that the bent pipe 3 and conduit 1 can be formed by cutting and processing the same round pipe. The cutting routes of the nozzle and the bent pipe 3 are as shown in Figure 6 and Figure 7 . As shown in Figure 12 is a cutting route map of a said round pipe.

[0096] S3: Cutting and assembling, cut the pipe wall of the said round pipe along the cutting route map to obtain the inclined part 2 and conduit 1. Fit the inclined part 2 and conduit 1 along the inner wall, as shown in Figure 15 . Finally, seal the mated part, such as welding, gluing, etc., to prevent the high-pressure fluid inside the nozzle from leaking during operation or causing the inclined part to crack. In some embodiments, after cutting and processing, there is also the bent pipe 3, and the sealing of the bent pipe 3 has been described in the structural part.

[0097] In some embodiments, the cutting route diagram in step S23 can generate a planar development diagram to facilitate docking with the software system of the cutting processing equipment and modify the cutting route. The planar development diagram is a diagram generated by unfolding a cylindrical surface (the part surrounded by the cutting route) in three-dimensional space into a plane in two-dimensional space through the following steps. First, a straight line parallel to the central axis is taken on the cylindrical surface. After cutting the cylindrical surface along this straight line and unfolding it into a plane, at this time, the three-dimensional curve (i.e., the cutting route diagram) on the cylindrical surface is transformed into a two-dimensional curve on the plane. The two-dimensional curve on the plane is the planar development diagram of the cutting route. In the planar development diagram, the points on the solid line represent the positions that the cutting processing equipment needs to cut. The horizontal coordinate on the plane represents the axial displacement of the circular tube, and the vertical coordinate represents the arc length of the rotation of the circular tube; the dashed line represents the straight line for cutting the cylindrical surface.

[0098] In some embodiments, the process of unfolding the cylindrical surface into a plane can be based on a grid method, that is, using straight lines parallel to the central axis on the cylindrical surface to divide the cylindrical surface into several continuous narrow strip surfaces. Then, small planar (polygonal) surfaces are used to approximate the narrow strip surfaces to obtain a set of continuous polygons, and then the continuous polygons are continuously spread out on the plane to obtain the corresponding plane of the cylindrical surface.

[0099] In some embodiments, in order to assist in assembling the very small inclined part 2, solve the problem that it is difficult to align during assembly and deviation is likely to occur, and improve the assembly consistency. In step S23, a communication area is set between the mating curves on the outer walls of the conduit 1 and the inclined part 2. The length and width of the communication area can be set to about h. After the cutting in step S3, the communication area forms a connecting part 4. Figure 14 Shown is a planar development diagram of a cutting route. After the cutting in step S3, the conduit 1, the inclined part 2, and the connecting part 4 are obtained. By bending the connecting part 4, the inner wall edge of the inclined part 2 can be made to fit the inner wall of the groove on the conduit 1, as Figure 15 shown.

[0100] In some embodiments, the tool used for bending the connecting part 4 is a pair of pliers. The clamping positions of the pliers are Figure 15 the upper and lower ends on the left side of the structure shown. This causes the inclined part 2 after bending and forming to shift slightly downward compared to the original dimension design. The offset is generally 0.05 mm. As a result, a part of the edge of the inclined part 2 will be redundant and cannot fit well with the groove on the conduit 1. To solve this problem, during processing, it is necessary to correct the cutting route diagram. For example, cut a part more inward at the circumferential edge of the inclined part 2, such as Figure 16 the part between the dashed line and the outer peripheral solid line in. The solid line is the cutting route diagram obtained in step S2, and the dashed line represents the edge correction 22 (the left edge of the inclined part 2) of the cutting route diagram.

[0101] Thus, the edge correction can compensate for the problem that the sinking of the inclined portion 2 caused by some bending methods does not match the original design, thereby ensuring that the inclined portion 2 can fit well with the groove on the catheter 1, improving the welding effect, and ensuring the sealing performance of the connection.

[0102] In some embodiments, the inclined portion 2 is fixedly welded to the catheter 1. A protrusion 23 is provided at the edge of the inclined portion 2 facing away from the catheter 1, and a fixing buckle 13 is provided on the catheter 1. The protrusion 23 and the fixing buckle 13 are used to assist in the alignment of the inclined portion 2 and the catheter 1. The protrusion 23 and the connecting portion 4 can be arranged opposite to each other in the left-right direction of the inclined portion 2. The fixing buckle 13 can be a groove-like structure, that is, a concave pit is provided on one side of the fixing buckle 13 facing the inclined portion 2. The concave pits on the two fixing buckles 13 can be arranged opposite to each other in the front-back direction. After the connecting portion 4 is bent, the protrusion 23 can be simultaneously inserted into the concave pits on the two fixing buckles 13. By the constraint and limitation of the protrusion 23 and the fixing buckle 13, the pre-fixing effect on the inclined portion 2 can be achieved, preventing the inclined portion 2 from being easily deflected during welding, and finally ensuring the consistency of the batch production of the nozzle. As Figure 17 Shown is a planar development view of a cutting route diagram. After cutting, a protrusion 23 connected to the inclined portion 2 and a fixing buckle 13 connected to the catheter 1 can be obtained.

[0103] In some embodiments, a protrusion curve and a fixing buckle curve are respectively provided on the outer wall matching curves of the catheter 1 and the inclined portion 2. During the laser cutting process, the cutting can be carried out along the protrusion curve, so that the above-mentioned protrusion 23 can be cut out, and the cutting can be carried out along the fixing buckle curve, so that the above-mentioned fixing buckle 13 can be cut out. The formed protrusion 23 and fixing buckle 13 can cooperate with each other, so as to play a role in assisting the alignment of the inclined portion 2 and the catheter 1.

[0104] In some embodiments, the nozzle of the embodiment of the present invention is processed and formed by laser cutting. Before bending the inclined portion 2 towards the first inclined surface 11 and the second inclined surface 12 of the catheter 1, the spray holes 21 are processed on the inclined portion 2 by laser cutting. Thus, the processed spray holes 21 can be perpendicular to the wall surface of the inclined portion 2, that is, the extending direction of the spray holes 21 is the thickness direction of the inclined portion 2, avoiding the situation that when the spray holes 21 are processed after bending, there is an angle between the extending direction of the spray holes 21 and the thickness direction of the inclined portion 2, which is likely to cause blockage of the fluid, and ensuring the impact force when the fluid is ejected.

[0105] In some embodiments, after the inclined portion 2 is bent towards the catheter 1, the inclined portion 2 can be fixedly welded to the first inclined surface 11 and the second inclined surface 12 of the catheter 1 by laser welding or brazing.

[0106] In some embodiments, the inclined portion 2 and the conduit 1 are cut and formed by three-dimensional cutting, that is, a metal round tube can be directly cut by laser. During cutting, the metal round tube can rotate, and at this time, the laser head can be regarded as cutting on a plane. The software system of the laser cutting equipment processes using the plane development diagram of the cutting path obtained in step S23. The horizontal coordinate on the plane represents the axial displacement of the round tube, and the vertical coordinate represents the arc length of the rotation of the round tube.

[0107] In some embodiments, the laser cutting process is adopted, which has the advantages of high precision, small deformation, few burrs, and high speed. During laser cutting, when the laser beam irradiates the surface of the workpiece (the base material for processing the nozzle), the metal around the irradiated spot melts, the metal vapor expands rapidly, generating a micro-explosion, ejecting the molten material at high speed and generating a highly directional shock wave in the opposite direction, forming a hole. As the beam moves along the cutting path of the stainless steel tube, the cutting of the round tube can be completed.

[0108] In some embodiments, when laser welding the inclined portion 2 and the conduit 1, using the laser as the heat source and a material with a melting point lower than that of the base material as the filler metal, after heating and melting, the liquid filler metal wets the base material, fills the joint gap and diffuses with the base material, thereby realizing the laser welding between the first inclined surface 11 and the second inclined surface 12 of the inclined portion 2 and the conduit 1.

[0109] In some embodiments, when processing the nozzle, the following sequence can generally be adopted. First, design the laser cutting path of the stainless steel tube, then perform laser continuous cutting, bend the inclined portion 2, and finally laser weld the inclined portion 2 and the conduit 1.

[0110] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0111] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0112] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0113] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0114] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0115] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. A nozzle, characterized in that, include: A conduit, wherein one end of the conduit is provided with a first inclined surface and a second inclined surface arranged to intersect each other, and a groove is defined between the first inclined surface and the second inclined surface; An inclined portion is integrally formed with the conduit and fits in the groove, an edge of the inclined portion is sealed and connected to both the first inclined surface and the second inclined surface to block the port of the conduit, and a spray hole is provided on the inclined portion, and the spray hole is connected to the inner cavity of the conduit.

2. The nozzle according to claim 1, characterized in that, The invention comprises a bending tube, which is integrally formed with the conduit and connected to the other end of the conduit. The bending tube comprises a plurality of tube segments, and the tube segments and the conduit and two adjacent tube segments are connected via a male joint and a female joint. The male joint and the female joint are rotatably assembled so that the bending tube can be bent and deformed.

3. The nozzle according to claim 1, characterized in that, A connecting portion is provided between the inclined portion and the conduit, the connecting portion is connected to the first inclined surface, and the inclined portion is fitted with the conduit through the bending of the connecting portion.

4. The nozzle according to claim 1, characterized in that, The spray hole includes a first hole, a second hole and a gap, the gap is connected between the first hole and the second hole, and the sides of the first hole, the second hole and the gap are perpendicular to the outer wall of the inclined portion, and the sizes of the first hole, the second hole and the gap gradually increase from the inside to the outside.

5. The nozzle according to claim 1, characterized in that, It includes a flexible tube, which is sleeved on the outer peripheral side of the curved tube, one end of the flexible tube is sealed and connected to the catheter, and the other end of the flexible tube is sealed and connected to the end of the curved tube away from the catheter, all the male connectors and the female connectors are located in the flexible tube, the flexible tube can be flexibly deformed, and the flexible tube is used to achieve waterproof sealing of the curved tube.

6. The nozzle according to claim 5, characterized in that, It comprises two clamping pieces, both of which are sleeved on the outer peripheral side of the flexible tube, one of which is used to clamp and fix one end of the flexible tube to the conduit, and the other clamping piece is used to clamp and fix the other end of the flexible tube to the curved tube.

7. The nozzle according to any one of claims 1 to 6, characterized in that, The male connector includes two first protrusions, both of which are arc-shaped, and a first arc-shaped groove is defined between each of the first protrusions and the pipe section, a circular groove is defined between the two first protrusions, and the two first arc-shaped grooves are arranged concentrically with the circular groove; The female connector includes a middle protrusion and two second protrusions, the middle protrusion is located between the two second protrusions, and a second arc groove is limited between each of the second protrusions and the middle protrusion, and the two second arc grooves are arranged concentrically with the circular groove; The middle protrusion is pivotally engaged in the circular groove, the two second protrusions correspond one-to-one and are slidably engaged in the two first arc grooves, and the two first protrusions correspond one-to-one and are slidably engaged in the two second arc grooves.

8. A dental cleaning device, characterized in that, Includes a nozzle as described in any one of 1-7 above.

9. A processing method of a nozzle according to any one of the above claims 1-8, characterized in that, The following steps are involved: Set the inner diameter φ, wall thickness h, and spray direction θ of the nozzle, and select a circular tube with an inner diameter of φ and a wall thickness of h, where θ is the angle between the nozzle spray fluid and the central axis of the conduit; Calculate the mating curve at the inner walls of the conduit and the inclined portion by combining the equations of two cylindrical surfaces with a diameter of φ and an included angle of θ between their central axes. Then, through the perpendicular mapping of the mating curve at the inner wall to the outer wall, obtain the outer wall mating curves of the conduit and the inclined portion respectively, and splice the outer wall mating curves of the conduit and the inclined portion and the nozzle hole curve to obtain the cutting route map; Cut the pipe wall of the circular pipe along the cutting route map to obtain the inclined portion and the conduit; Mate the inclined portion and the conduit along their inner walls and seal the mated parts.

10. The processing method of the nozzle according to claim 9, characterized in that, Set a communication area between the outer wall mating curves of the conduit and the inclined portion. The communication area forms a connecting portion after cutting, and bend the connecting portion so that the inclined portion and the conduit cooperate with each other.

11. The processing method of the nozzle according to claim 10, characterized in that, Respectively set a convex curve and a fixing buckle curve on the outer wall mating curves of the conduit and the inclined portion. The convex curve and the fixing buckle curve cooperate with each other after cutting to assist the alignment of the cooperation between the inclined portion and the conduit.

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