A negative pressure suction root canal washing device and system

Abstract

The utility model discloses a negative pressure suction root canal flushing device and system, the device comprises a handle, the handle is connected to a flushing tip via a curved pipe, a liquid inlet pipe and a liquid extraction pipe are also arranged on the handle, a gap is arranged between the curved pipe and the liquid extraction pipe, the liquid inlet pipe is connected to the outlet end of the curved pipe via the gap, and the liquid extraction pipe is connected to the inside of the flushing tip. The utility model not only simplifies the root canal flushing work and improves the flushing efficiency, but also can eliminate the risk of positive pressure flushing liquid flushing out of the apical foramen from the root source, avoid the flushing liquid from damaging the periapical tissue, prevent the root canal infected substances carried by the flushing liquid from infecting the periapical tissue, improve the safety of root canal flushing, and improve the patient experience.

Description

Technical Field

[0001] The utility model relates to the technical field of oral medicine root canal treatment, in particular to a negative pressure suction type root canal washing device and system. Background Art

[0002] Pulp and periapical diseases are one of the most common diseases in the field of oral medicine. The currently recognized treatment method is root canal treatment. The process of root canal treatment usually includes three main steps: root canal shaping, root canal irrigation, and root canal filling. Among them, root canal irrigation is also called chemical preparation. Perfect root canal irrigation is conducive to infection control of the root canal system and can improve the success rate of root canal treatment. Traditional root canal irrigation mainly uses a solid irrigation tip to rinse the root canal, but because the water flows from outside to inside, it is difficult to replace the infected substances and debris (including the smear layer) in the apical area. Therefore, it is necessary to use an irrigation needle to rinse it deep into the apical area so that the infected substances and debris in the apical area flow from inside to outside. Through repeated rinsing and flushing, the infected substances and debris remaining in the apical area after flushing are replaced. The operation steps are cumbersome and the efficiency of root canal irrigation is low.

[0003] The inventor provides a hollow flushing tip in patent CN216603115U, which can infuse flushing liquid into the apical area, so that the flushing liquid flows from the inside to the outside in the apical area, and at the same time, ultrasonic oscillation causes the smear layer and debris on the side wall of the root canal to be discharged from the top of the root canal with the water flow, thereby combining the flushing step and the flushing step into one, and flushing is performed while flushing, simplifying the operation steps and improving the flushing efficiency. However, when the hollow flushing tip in patent CN216603115U is used to infuse flushing liquid into the apical area, positive pressure flushing liquid has the risk of rushing out of the apical foramen, and will carry the infected substances in the root canal into the periapical tissue; in addition, some flushing liquids with strong bactericidal ability but irritation, such as sodium hypochlorite, will damage the periapical tissue once they exceed the apical foramen, and even cause facial swelling and tissue necrosis. Summary of the invention

[0004] One purpose of the utility model is to provide a negative pressure suction root canal flushing device, which utilizes the gap between the liquid extraction tube and the curved tube to infuse flushing liquid into the root canal, and then utilizes the flushing tip to negatively pressure extract the flushing liquid after cleaning from the bottom of the apical area, and changes the flow direction of the flushing liquid from the existing "inside in and out" to "outside in and inside out", thereby avoiding the infusion of positive pressure flushing liquid into the apical area from the root source, and solves the problems in the prior art that the flushing liquid rushes out of the apical foramen from the bottom to damage the periapical tissue, and the infection substances in the root canal carried by the flushing liquid infect the periapical tissue.

[0005] The utility model is realized by the following technical solutions:

[0006] A negative pressure suction root canal flushing device comprises a handle, which is connected to a flushing tip via a curved pipe. A liquid inlet pipe and a liquid extraction pipe are also provided on the handle. A gap is provided between the curved pipe and the liquid extraction pipe. The liquid inlet pipe is connected to the outlet end of the curved pipe via the gap, and the liquid extraction pipe is connected to the interior of the flushing tip.

[0007] In the present technical solution, similar to the prior art, the flushing device includes a handle, and the flushing tip connected to the handle via a bend is a hollow structure. The handle is provided with a liquid inlet pipe for connecting to a positive pressure device, and the positive pressure device injects the flushing liquid contained in the liquid storage tank into the liquid inlet pipe, wherein the positive pressure device can use a high-pressure air pump. The handle is also provided with a liquid extraction pipe for connecting to a negative pressure device, and the negative pressure device can use a liquid extraction pump to extract the liquid in the liquid extraction pipe. In different embodiments, an ultrasonic vibration motor can be provided on the handle, the connector or the bend to realize the ultrasonic oscillation flushing function.

[0008] In this technical solution, unlike the prior art, there is a gap between the outer wall of the liquid extraction tube and the inner wall of the curved tube, and the gap and the liquid inlet tube together constitute a flow channel for the flushing liquid. After the flushing liquid enters the curved tube through the liquid inlet tube, it flows along the gap toward the outlet end of the curved tube, and the flushing liquid discharged from the outlet end flows into the root canal along the outer wall of the flushing tip.

[0009] Since there is air in the apical region of the root canal, an air plug will be formed, so that the flushing liquid flowing into the root canal cannot contact the side wall of the root canal in the apical region. In this technical solution, the inside of the flushing tip is connected to the liquid extraction tube. When the tip of the flushing tip penetrates into the apical region, the air in the apical region is extracted by the negative pressure device, so that the flushing liquid can penetrate into the apical region, fully contact the side wall of the root canal and form a fluid shear force, and flushing and flushing are performed simultaneously. At the same time, the used flushing liquid and the debris in the root canal can be extracted from the apical region through the liquid extraction tube under negative pressure.

[0010] When in use, the flushing liquid flows into the root canal through the liquid inlet pipe, the gap, and the outer wall of the flushing tip. The flushing tip flushes and rinses the root canal under the action of ultrasonic vibration. The used flushing liquid is drawn out of the root canal under the action of negative pressure, which simplifies the root canal flushing work and improves the flushing efficiency. At the same time, compared with the existing method of positive pressure infusion of flushing liquid from the root apex, this technical solution can eliminate the risk of positive pressure flushing liquid rushing out of the apical foramen from the root, reduce the impact of the flushing liquid on the surrounding tissues, improve the safety of root canal flushing, and improve the patient experience.

[0011] Furthermore, a fixing member located in the gap is connected between the curved pipe and the liquid extraction pipe. A fixing member is provided on the inner wall of the curved pipe, and the fixing member is connected to the liquid extraction pipe. The fixing member fixes the liquid extraction pipe relative to the curved pipe, thereby preventing the liquid extraction pipe from moving when the irrigation liquid flows through the gap and affecting the root canal irrigation. In addition, the fixing member can transmit the vibration applied by the ultrasonic vibration motor to the curved pipe to the liquid extraction pipe, thereby causing the flushing tip to vibrate, thereby improving the flushing effect.

[0012] In some embodiments, the connection position between the flushing tip and the liquid extraction pipe can be located either inside the curved pipe or outside the curved pipe. In order to further improve the stability of the flushing tip under vibration, preferably, the connection position between the flushing tip and the liquid extraction pipe is located inside the curved pipe, and the flushing tip is clamped by a clamping member disposed near the outlet end of the curved pipe.

[0013] As a clamping structure of the flushing tip in the utility model, a through hole is provided on the bent pipe, a clamping piece is provided in the through hole, the clamping piece is threadedly connected to the through hole, and the clamping piece is used to abut the flushing tip when the flushing tip is connected to the liquid extraction tube.

[0014] In the technical solution, a through hole is provided on the elbow, and a clamping member provided in the through hole is threadedly connected to the through hole. When the top end of the flushing tip is connected to the liquid extraction tube, the clamping member is screwed in so that the abutting end of the clamping member abuts against and squeezes the wall surface of the flushing tip. In some preferred embodiments, at least two clamping members are provided in the elbow, and the central axes of the two clamping members are collinear to clamp the flushing tip.

[0015] In the present technical solution, the connection between the flushing tip and the liquid extraction tube limits the movement of the flushing tip in the axial direction, and the clamping member clamps the flushing tip to limit the movement of the flushing tip in the radial direction, thereby improving the stability of flushing. At the same time, the clamping member abutting against the flushing tip can also transmit the vibration on the bent pipe to the flushing tip, thereby further improving the flushing effect.

[0016] As another clamping structure of the flushing tip in the utility model, a through hole is provided on the bent pipe, a clamping piece is provided in the through hole, a mounting plate is provided on the clamping piece, a spring is provided on the mounting plate, the spring is connected to the outer wall of the bent pipe, and the clamping piece is used to abut against the flushing tip when the flushing tip is connected to the liquid extraction tube.

[0017] In the present technical solution, a through hole is also provided on the curved pipe, and a clamp is provided in the through hole. The difference is that the through hole and the clamp are not threadedly connected, but the clamp can slide relative to the through hole. A spring is connected to the mounting plate provided on the clamp, and the spring is connected to the outer wall of the curved pipe. When the flushing tip moves toward the liquid extraction tube, the clamp is first pushed to move outside the curved pipe, and the spring is in a compressed state. Then, after the top end of the flushing tip is connected to the liquid extraction tube, the compressed spring acts on the clamp to make the clamp abut against and squeeze the flushing tip. Compared with the threaded connection method, the method of using a spring to push the clamp to squeeze the outer wall of the flushing tip has the advantage of being more convenient to operate, and the disadvantage is that when the flushing tip vibrates, the clamp is not as stable as the threaded connection in clamping the flushing tip.

[0018] Furthermore, the flushing tip is connected to the liquid extraction tube via a thread.

[0019] In the present technical solution, at least a portion of the liquid extraction tube close to the inlet end is made of metal, and a first thread is provided on the inlet end of the liquid extraction tube. At the same time, a second thread matching the first thread is provided on the outer wall at the top end of the washing tip, thereby realizing a threaded connection between the liquid extraction tube and the washing tip.

[0020] By setting the flushing tip and the liquid extraction tube as a threaded connection, the flushing tip can be effectively prevented from moving in the axial direction, further improving the stability of the connection. In addition, the disassembly and assembly of the flushing tip is more convenient, and the flushing tip can be replaced and cleaned according to actual needs, thereby improving the flexibility of maintenance.

[0021] Furthermore, a groove is provided on the flushing tip, and the groove matches the end of the clamp. In the present technical solution, the groove matches the end of the clamp, which means that the size and shape of the groove are consistent with the end of the clamp, that is, the abutting end. When the clamp abuts against the flushing tip, the abutting end of the clamp can be inserted into the groove on the outer wall of the flushing tip to further improve the clamping effect. At the same time, by setting the position of the groove at the position where the clamp abuts against the flushing tip when the flushing tip is connected to the liquid extraction tube, the groove can also have a positioning function, prompting medical personnel that the current flushing tip has been stably connected to the liquid extraction tube and the clamp is also located in the groove.

[0022] Furthermore, an inclined hole is provided on the bottom end of the flushing tip. The bottom end of the flushing tip is an open end for sucking debris in the apical area into the flushing tip. If the open end of the flushing tip is horizontally opened, the reflux path of the infected substances in the root canal is closer to the apical foramen, and when the infected substances are blocked and accumulated here, it may affect the periapical region. In the present technical solution, the open end of the flushing tip is an inclined hole extending from the end surface to the side wall, so that the open end of the flushing tip is large enough to prevent the smear layer and debris from blocking the open end of the flushing tip. Even larger debris can be stuck in the inclined hole of the flushing tip. The stuck debris can be removed by increasing the pressure of the extraction tube, or by taking out the flushing tip and wiping it with a cotton ball or rinsing it with water. At the same time, the inclined hole makes the reflux path of the flushing liquid far away from the apical foramen, while ensuring the formation of fluid shear force at the apex, it prevents the accumulation of infected substances at the apex.

[0023] Furthermore, the liquid extraction tube includes a first tube and a second tube, the first tube is fixed in the bent tube, and the second tube is located outside the handle.

[0024] In the technical solution, the liquid extraction tube includes a first tube and a second tube, wherein the first tube is fixed in the curved tube by a fixing member, and the second tube is arranged outside the handle. By arranging the second tube outside the handle, the medical staff can remove the second tube for cleaning and disinfection after each root canal flushing, thereby reducing the bacteria or other pathogens remaining in the liquid extraction tube to a certain extent. In some embodiments, the second tube can be directly connected to a negative pressure device, such as a saliva suction device, so that the used flushing liquid is directly sucked into the saliva suction device for discharge.

[0025] Another object of the present invention is to provide a negative pressure suction root canal flushing system based on any of the aforementioned root canal flushing devices. The flushing system includes a negative pressure device, a positive pressure device and a liquid storage tank, and also includes any of the aforementioned negative pressure suction root canal flushing devices, the positive pressure device is used to inject the flushing liquid contained in the liquid storage tank into the liquid inlet pipe of the flushing device, the negative pressure device is connected to the liquid extraction pipe, the liquid extraction pipe includes a first pipe fixed in the curved pipe, and a second pipe located outside the handle, and the first pipe and the second pipe are detachably connected.

[0026] In this technical solution, the negative pressure device of the flushing system is connected to the liquid extraction pipe, and the positive pressure device and the liquid storage tank are connected to the liquid inlet pipe. The flushing liquid in the liquid storage tank enters the handle and the elbow through the liquid inlet pipe under the positive pressure applied by the positive pressure device, and finally flows into the root canal along the flushing tip; after the flushing and flushing in the root canal are completed, the flushing liquid in the apical area is sucked into the flushing tip through the bottom end of the flushing tip and discharged through the liquid extraction pipe. The infusion of positive pressure flushing liquid into the apical area is avoided from the root source, and the problems in the prior art that the flushing liquid rushes out of the apical foramen under the action of positive pressure to damage the surrounding tissues, and the infected substances in the root canal carried by the flushing liquid infect the periapical tissues are solved.

[0027] Furthermore, it also includes a baffle connected between the second tube and the negative pressure device, the baffle includes a shell, a motor is arranged on the shell, the output end of the motor moves through the shell, and the output end of the motor is connected to a baffle located in the shell.

[0028] In the present technical solution, the baffle is preferably arranged near the saliva suction device or the negative pressure device, and the baffle is connected to the first tube through a second tube, and the length of the second tube is preferably 30 to 40 cm. The baffle includes a shell, and a motor arranged on the shell is used to drive the baffle to rotate a certain angle. For example, when the baffle is rotated to be parallel to the flow direction of the liquid, the flow of the flushing liquid is almost unaffected; when the baffle is rotated to be perpendicular to the flow direction of the liquid, the flushing liquid cannot flow through the shell. Therefore, by driving the baffle to rotate, the flow of the flushing liquid in the liquid extraction tube can be adjusted, and then the suction pressure can be changed when the flushing liquid is sucked under negative pressure, and the debris in the apical area is sucked into the flushing tip by using the sharply increased suction pressure, so as to avoid the debris blocking the open end of the flushing tip during the negative pressure suction process.

[0029] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0030] 1. The utility model not only simplifies the root canal flushing work and improves the flushing efficiency, but also can eliminate the risk of positive pressure flushing fluid rushing out of the apical foramen from the root, avoid the flushing fluid from damaging the periapical tissue, and prevent the infected substances in the root canal carried by the flushing fluid from infecting the periapical tissue, thereby improving the safety of root canal flushing and improving the patient experience;

[0031] 2. The threaded connection between the liquid extraction tube and the flushing tip of the utility model limits the movement of the flushing tip in the axial direction, and the clamping member clamps the flushing tip to limit the movement of the flushing tip in the radial direction, thereby improving the clamping stability of the flushing tip during the flushing process. At the same time, the clamping member abutting against the flushing tip can also transmit the vibration on the curved pipe to the flushing tip, thereby further improving the flushing effect.

[0032] 3. The utility model can improve the clamping effect by arranging a groove on the flushing tip, and the groove also has a positioning function, which can remind medical staff that the flushing tip is currently stably connected to the liquid extraction tube and the clamping piece is also located in the groove;

[0033] 4. The utility model provides a first tube and a second tube that are detachably connected to form a liquid extraction tube, and the second tube is located outside the handle. The second tube can be replaced and disinfected after each root canal flushing, thereby reducing the bacteria or other pathogens remaining in the liquid extraction tube to a certain extent;

[0034] 5. The utility model can adjust the flow rate of the flushing liquid in the liquid extraction tube by driving the baffle plate to rotate, thereby realizing the ability to change the suction pressure when the flushing liquid is sucked under negative pressure, and utilize the sharply increased suction pressure to suck the debris in the apical area into the flushing tip, thereby preventing the debris from blocking the opening end of the flushing tip during the negative pressure suction process; at the same time, by setting the opening of the flushing tip as an inclined hole, the opening end of the flushing tip is made large enough, thereby preventing the debris from blocking the opening end of the flushing tip, and preventing the accumulation of infected substances near the apical foramen. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0036] Figure 1 It is a structural schematic diagram of the washing device in a specific embodiment of the utility model;

[0037] Figure 2 It is a partial cross-sectional schematic diagram of a connector and an elbow in a specific embodiment of the utility model;

[0038] Figure 3 It is a schematic diagram of the connection between the bent pipe and the first pipe through the fixing member in a specific embodiment of the utility model;

[0039] Figure 4 This is a schematic diagram of the structure when the washing tip is placed in the curved pipe in a specific embodiment of the utility model;

[0040] Figure 5 It is a schematic diagram of a specific embodiment of the utility model in which the washing tip is fixed on the first tube;

[0041] Figure 6 This is a schematic diagram of the structure when the washing tip is placed in the curved pipe in a specific embodiment of the utility model;

[0042] Figure 7 This is a schematic diagram of the structure of the tip of the washing machine in a specific embodiment of the utility model;

[0043] Figure 8 It is a structural schematic diagram of a flow blocking member of a structure of a flushing system in a specific embodiment of the utility model in a blocking state;

[0044] Fig. 9 It is a structural schematic diagram of a flow-blocking member of another structure of a flushing system in a specific embodiment of the utility model in a blocking state.

[0045] Marks and corresponding parts names in the attached drawings:

[0046] 1-handle, 2-liquid inlet pipe, 3-liquid extraction pipe, 31-first pipe, 32-second pipe, 4-connector, 5-elbow pipe, 51-fixing part, 52-gap, 53-through hole, 54-clamping part, 55-spring, 56-mounting plate, 6-washing tip, 61-oblique hole, 62-groove, 63-gasket, 7-ultrasonic vibration motor, 81-first shell, 82-first interface, 83-second interface, 84-first baffle plate, 85-first motor, 86-first transmission rod, 91-second shell, 92-second baffle plate, 93-bearing, 94-second motor, 95-first bevel gear, 96-second bevel gear, 97-third bevel gear, 98-third transmission rod, 99-second transmission rod. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0048] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0049] Embodiment 1:

[0050] like Figures 1 to 3 A negative pressure suction root canal flushing device is shown, comprising a handle 1, the handle 1 being connected to a flushing tip 6 via a curved pipe 5, the handle 1 being further provided with a liquid inlet pipe 2 and a liquid extraction pipe 3, a gap 52 being provided between the curved pipe 5 and the liquid extraction pipe 3, the liquid inlet pipe 2 being connected to the outlet end of the curved pipe 5 via the gap 52, and the liquid extraction pipe 3 being connected to the interior of the flushing tip 6.

[0051] When in use, the flushing liquid flows into the root canal through the liquid inlet pipe, the gap, and the outer wall of the flushing tip. The flushing tip flushes and rinses the root canal under the action of ultrasonic vibration. The used flushing liquid is extracted from the root canal under the action of negative pressure, which simplifies the root canal flushing work and improves the flushing efficiency. At the same time, compared with the existing method of positive pressure infusion of flushing liquid from the root apex, this technical solution can eliminate the risk of positive pressure flushing liquid rushing out of the apical foramen from the root, avoid the flushing liquid from damaging the periapical tissue, and prevent the root canal infected substances carried by the flushing liquid from infecting the periapical tissue, thereby improving the safety of root canal flushing and improving the patient experience.

[0052] In one or more embodiments, the liquid extraction tube may be made of medical rubber or other flexible materials. In some embodiments, a portion of the liquid extraction tube, for example, a portion located in the curved tube, may be made of metal. In some embodiments, the liquid extraction tube may be a round tube, or at least part of it may be a rectangular tube with a rectangular cross section.

[0053] In some embodiments, the liquid extraction tube may be located inside the handle or outside the handle to facilitate replacement of part of the liquid extraction tube.

[0054] In different embodiments, an ultrasonic vibration motor may be provided on the handle, the connector or the elbow to achieve the ultrasonic oscillation washing function.

[0055] In some preferred embodiments, a fixing member 51 located in the gap 52 is connected between the curved pipe 5 and the liquid extraction pipe 3. Figure 3 As shown, a plurality of fixing members are arranged on the same cross section of the gap, and the plurality of fixing members are evenly distributed along the circumference of the liquid extraction tube.

[0056] In some preferred embodiments, Figure 7 As shown, an oblique hole 61 is provided on the bottom end of the flushing tip 6. Compared with a hole opened at the open end, the oblique hole makes the open end of the flushing tip large enough to prevent debris from blocking the open end of the flushing tip.

[0057] In some embodiments, Figure 2 As shown, the liquid extraction tube 3 includes a first tube 31 and a second tube 32 , wherein the first tube 31 is fixed in the curved tube 5 , and the second tube 32 is located outside the handle 1 .

[0058] In one or more embodiments, the first tube is a metal tube, and the second tube is a rubber tube. In one or more embodiments, the length of the second tube is 30 to 40 cm. In one or more embodiments, the first tube and the second tube are preferably detachably connected.

[0059] Embodiment 2:

[0060] On the basis of Example 1, Figure 4 and Figure 5 As shown, a through hole 53 is provided on the curved pipe 5, and a clamping member 54 is provided in the through hole 53. The clamping member 54 is threadedly connected to the through hole 53. The clamping member 54 is used to abut against the flushing tip 6 when the flushing tip 6 is connected to the liquid extraction tube 3. The flushing tip 6 is threadedly connected to the liquid extraction tube 3.

[0061] like Figure 5As shown, when the top of the flushing tip 6 is connected to the inlet end of the liquid extraction pipe 3, the two clamping members abut and squeeze the outer wall of the flushing tip. By using the threaded connection between the flushing tip and the liquid extraction pipe and the threaded connection between the clamping member and the through hole, the flushing tip can be stably connected to the liquid extraction pipe during the flushing process. At the same time, the clamping member can also transmit the vibration on the curved pipe to the flushing tip, further improving the flushing effect.

[0062] In some embodiments, a groove 62 is provided on the flushing tip 6, and the groove 62 matches the end of the clamping member 54. The groove can further improve the stability of the clamping, and also has a positioning function, prompting medical personnel that the flushing tip is currently stably connected to the liquid extraction tube and the clamping member is also located in the groove.

[0063] Embodiment 3:

[0064] Based on the above embodiments, Figure 6 As shown, a through hole 53 is provided on the curved pipe 5, a clamping member 54 is provided in the through hole 53, a mounting plate 56 is provided on the clamping member 54, a spring 55 is provided on the mounting plate 56, and the spring 55 is connected to the outer wall of the curved pipe 5, and the clamping member 54 is used to abut against the flushing tip 6 when the flushing tip 6 is connected to the liquid extraction tube 3.

[0065] In this embodiment, when the flushing tip moves toward the liquid extraction tube, the clamping member is first pushed to move outward from the curved tube, and the spring is in a compressed state. Then, after the top end of the flushing tip is connected to the liquid extraction tube, the compressed spring acts on the clamping member, causing the clamping member to abut against and squeeze the flushing tip. Compared with the clamping method in Example 2, the method of using the spring to push the clamping member to squeeze the outer wall of the flushing tip has the advantage of being more convenient to operate, but the stability is not as high as the clamping method in Example 2.

[0066] In one or more embodiments, a conical surface is provided on the extrusion end of the clamping member for extruding the outer wall of the flushing tip, which is conducive to pushing the clamping member to move outward from the bent pipe when the top end of the flushing tip contacts the clamping member.

[0067] Embodiment 4:

[0068] On the basis of the above embodiments, a negative pressure suction root canal flushing system includes a negative pressure device, a positive pressure device and a liquid storage tank, and also includes the negative pressure suction root canal flushing device in any of the above embodiments, the positive pressure device is used to inject the flushing fluid contained in the liquid storage tank into the liquid inlet pipe 2 of the flushing device, the negative pressure device is connected to the liquid extraction pipe 3, the liquid extraction pipe 3 includes a first tube 31 fixed in the curved pipe 5, and a second tube 32 located outside the handle 1, the first tube 31 and the second tube 32 are detachably connected; it also includes a flow blocking member connected between the second tube 32 and the negative pressure device, the flow blocking member includes a shell, a motor is arranged on the shell, the output end of the motor movably passes through the shell, and the output end of the motor is connected to a baffle located in the shell.

[0069] like Figure 8 As shown, the first shell 81 of the flow blocker is provided with a first interface 82 for connecting the second tube and a second interface 83 for connecting the negative pressure device. The first motor 85 provided on the first shell 81 is connected to the first baffle plate 84 through the first transmission rod 86. Driven by the first motor, the first baffle plate adjusts the pressure in the liquid extraction tube 3 by rotating, and then the debris in the apical area can be sucked into the flushing tip by the sharply increased suction pressure, so as to avoid the debris blocking the opening end of the flushing tip during the negative pressure suction process.

[0070] Embodiment 5:

[0071] Based on the above embodiments, Fig. 9 As shown, a bearing 93 is provided on the second housing 91 of the spoiler, a second transmission rod 99 is provided in the bearing 93, a plurality of second bevel gears 96 are provided on the second transmission rod 99, each second bevel gear 96 is meshed with a third bevel gear 97, and the third bevel gear 97 is connected to a second baffle plate 92 located in the second housing 91 through a third transmission rod 98; in addition, a first bevel gear 95 is also meshed with one of the second bevel gears 96, the first bevel gear 95 is driven by the second click 94, and the center axis of the first bevel gear 95 is parallel to the third bevel gear 97 and perpendicular to the center axis of the second bevel gear 96.

[0072] When in use, the first bevel gear 95 is driven to rotate by the second motor 94, and the first bevel gear 95 is driven by the second bevel gear 96 to drive the second transmission rod 99 to rotate. After the other second bevel gears 96 on the second transmission rod 99 rotate, the third bevel gear 97 is driven to rotate, and then the second baffle is driven to rotate through the third transmission rod 98.

[0073] By providing a plurality of second baffles, each baffle has a smaller area and rotates faster to better form a sharp increase in pressure. In addition, the baffle with a smaller area will not cause excessive backflow in the liquid extraction tube, reducing the risk of the used flushing liquid exceeding the root apex area.

[0074] The terms "first", "second", etc. (e.g., first housing, second housing, first transmission rod, second transmission rod, third transmission rod, etc.) used in the present invention are only used to distinguish the corresponding components for the sake of clarity of description, and are not intended to limit any order or emphasize importance, etc. In addition, the term "connected" used in the present invention may be directly connected or indirectly connected via other components unless otherwise specified.

[0075] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A negative pressure suction root canal flushing device, comprising a handle (1), wherein the handle (1) is connected to a flushing tip (6) via a curved tube (5), and the handle (1) is also provided with a liquid inlet tube (2) and a liquid extraction tube (3), characterized in that: A gap (52) is provided between the curved pipe (5) and the liquid extraction pipe (3); the liquid inlet pipe (2) is connected to the outlet end of the curved pipe (5) through the gap (52); and the liquid extraction pipe (3) is connected to the interior of the flushing tip (6).

2. A negative pressure suction root canal washing device according to claim 1, characterized in that: A fixing member (51) located in the gap (52) is connected between the curved pipe (5) and the liquid extraction pipe (3).

3. A negative pressure suction root canal washing device according to claim 1, characterized in that: The curved pipe (5) is provided with a through hole (53), a clamping piece (54) is provided in the through hole (53), the clamping piece (54) is threadedly connected to the through hole (53), and the clamping piece (54) is used to abut against the flushing tip (6) when the flushing tip (6) is connected to the liquid extraction pipe (3).

4. The negative pressure suction root canal washing device according to claim 1, characterized in that: The curved pipe (5) is provided with a through hole (53), a clamping member (54) is provided in the through hole (53), a mounting plate (56) is provided on the clamping member (54), a spring (55) is provided on the mounting plate (56), the spring (55) is connected to the outer wall of the curved pipe (5), and the clamping member (54) is used to abut against the flushing tip (6) when the flushing tip (6) is connected to the liquid extraction pipe (3).

5. A negative pressure suction root canal washing device according to claim 3 or 4, characterized in that: The flushing tip (6) is connected to the liquid extraction tube (3) via threads.

6. A negative pressure suction root canal washing device according to claim 5, characterized in that: The flushing tip (6) is provided with a groove (62), and the groove (62) matches the end of the clamping member (54).

7. The negative pressure suction root canal washing device according to claim 5, characterized in that: An oblique hole (61) is provided on the bottom end of the washing tip (6).

8. The negative pressure suction root canal washing device according to claim 1, characterized in that: The liquid extraction tube (3) comprises a first tube (31) and a second tube (32); the first tube (31) is fixed inside the curved tube (5), and the second tube (32) is located outside the handle (1).

9. A negative pressure suction root canal flushing system, comprising a negative pressure device, a positive pressure device and a liquid storage tank, characterized in that: It also comprises a negative pressure suction root canal flushing device according to any one of claims 1 to 8, wherein the positive pressure device is used to pressurize the flushing fluid contained in the liquid storage tank into the liquid inlet pipe (2) of the flushing device, and the negative pressure device is connected to the liquid extraction pipe (3), and the liquid extraction pipe (3) comprises a first tube (31) fixed in the curved pipe (5), and a second tube (32) located outside the handle (1), and the first tube (31) and the second tube (32) are detachably connected.

10. A negative pressure suction root canal flushing system according to claim 9, characterized in that: It also includes a flow-blocking member connected between the second tube (32) and the negative pressure device, the flow-blocking member includes a shell, a motor is arranged on the shell, the output end of the motor movably passes through the shell, and the output end of the motor is connected to a baffle located in the shell.

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