Flushing device for pulpitis root canal treatment

Abstract

The invention discloses a flushing device for pulpitis root canal treatment, and belongs to the technical field of medical instruments. According to the technical scheme, the flushing device for pulpitis root canal treatment comprises a handle assembly, the two ends of the handle assembly are a flushing end and a connecting end respectively, the flushing end is rotationally connected with a flushing head assembly, and the spraying direction of liquid is adjusted by rotationally adjusting the flushing head assembly; the spraying direction of liquid is adjusted by rotating and adjusting the flushing head assembly, so that the root canal flushing device can flexibly adapt to the shape of a root canal and has the advantages of reducing flushing blind areas and improving operation flexibility, in addition, the external dosing mechanism at the connecting end can be used for root canal flushing, the external negative pressure suction device can be used for root canal negative pressure liquid suction, and the application scene is wide.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to an irrigation device for root canal treatment of pulpitis. Background Technology

[0002] Root canal treatment is the core method for treating pulpitis and periapical periodontitis. Its key lies in thoroughly removing infected tissue and debris from inside the root canal and achieving effective disinfection through the irrigation process.

[0003] However, most irrigation devices currently used in clinical practice employ a fixed-angle nozzle design, meaning the spray direction cannot be dynamically adjusted according to the actual shape of the root canal. When dealing with curved, narrow, or anatomically complex root canals, this fixed structure makes it difficult for the irrigation fluid to accurately cover the target area, creating unavoidable irrigation blind spots. Residual bacteria and debris directly affect the efficiency of debridement and disinfection. During the procedure, dentists need to repeatedly change irrigation heads with different angles or forcibly adjust the patient's position to try to adapt to the root canal's orientation, which not only significantly prolongs treatment time but also increases the risk of operational errors and patient discomfort.

[0004] Furthermore, existing devices suffer from several drawbacks when dealing with varying root canal environments. Insufficient sealing of the ball head during rotation leads to fluid leakage, and poor nozzle positioning stability causes irrigation direction deviation. Additionally, the lack of an independent flow and pressure control mechanism at the handheld end results in over-reliance on external equipment, causing operational interruptions. Drastic pressure fluctuations within the root canal can also pose safety hazards, such as instruments exceeding the apical foramen. Therefore, developing an irrigating device that allows for flexible adjustment of the spray direction, ensures reliable sealing, provides precise positioning, and is easy to operate by hand is an urgent need to improve the adaptability, smoothness of operation, and clinical safety of root canal treatment. Summary of the Invention

[0005] The present invention provides an irrigation device for root canal treatment of pulpitis to solve at least one of the above-mentioned technical problems.

[0006] The technical solution adopted in this invention is as follows: An irrigation device for root canal treatment of pulpitis includes a handle assembly, with an irrigation end and a connection end at both ends. The irrigation end is rotatably connected to an irrigation head assembly, and the direction of liquid spray can be adjusted by rotating the irrigation head assembly.

[0007] Furthermore, this application also proposes that the flushing head assembly includes a ball head and a nozzle, the ball head and the nozzle are integrally formed and have a communicating spray channel, the flushing end is provided with a connector for connecting the ball head, the connector includes a rotating sleeve sleeved on the outside of the flushing head assembly, the end of the rotating sleeve is provided with a guide groove, the guide groove is clearance-fitted with the nozzle to provide an angle adjustment path for the nozzle.

[0008] Furthermore, this application also proposes to include a fixing sleeve, which is sleeved on the outside of the rotating sleeve for fixing the rotating sleeve to the rinsing end of the handle assembly.

[0009] Furthermore, this application also proposes that the handle assembly is provided with a liquid flow channel that communicates with the injection channel, and a sealing component is provided between the output end of the liquid flow channel and the input end of the injection channel. One end face of the sealing component is tightly fitted with the outer surface of the ball head, so as to achieve a sealing effect while increasing the resistance to the rotation of the ball head and improving the stability of the nozzle posture.

[0010] Furthermore, this application also proposes that the sealing assembly includes a sealing ring and a mounting base, the end of the handle assembly is provided with a trapezoidal frustum for fixing the mounting base, the mounting base is sleeved on the outside of the trapezoidal frustum and the inner wall of the mounting base is provided with a plurality of sealing rubber rings at intervals, the end of the mounting base is provided with a sleeve for sleeved with the sealing ring, and the annular end face of the sealing ring is tightly fitted with the ball head.

[0011] Furthermore, this application also proposes that the handle assembly includes an adjustment component, the adjustment component includes an adjustment handle, the side wall of the adjustment handle is provided with a mounting hole extending to the liquid flow channel, a push-type adjustment valve is slidably connected in the mounting hole, the adjustment valve is provided with a connecting channel for connecting the liquid flow channel, an elastic element is fixedly connected between the adjustment valve and the adjustment handle, by pressing the adjustment valve to make it slide in the mounting hole to have a first position where the connecting channel connects to the liquid flow channel and a second position where the connecting channel and the liquid flow channel are not connected, the flow rate can be adjusted by controlling the overlapping area of ​​the connecting channel and the liquid flow channel.

[0012] Furthermore, this application also proposes that a drain connector is fixedly connected inside the liquid flow channel, a limiting guide groove is provided on the side wall of the regulating valve, the connecting channel is located inside the limiting guide groove and at the uppermost end of the limiting guide groove, the end of the drain connector is slidably engaged with the limiting guide groove, and when sufficient downward pressure is applied to the regulating valve, the regulating valve reaches the maximum downward displacement, and the connecting channel is fully connected to the drain connector.

[0013] Furthermore, this application also proposes that the side wall of the adjusting handle is provided with an adjusting hole that extends through to the liquid flow channel, and a pressure adjusting block is threadedly connected to the adjusting hole. By rotating the adjusting block to adjust the length of the liquid flow channel, the cross-sectional area of ​​the liquid flow channel is adjusted, thereby adjusting the liquid pressure flowing through the liquid flow channel.

[0014] Furthermore, this application also proposes that the adjusting handle has an extension at one end near the fixed sleeve, the extension being detachably connected to the fixed sleeve, and the detachable connection method is any one of threaded connection, snap-fit, or interference fit.

[0015] Furthermore, this application also proposes that the end of the adjusting handle away from the flushing head assembly is detachably connected to a connecting handle, wherein the detachable connection method is any one of threaded connection, snap-fit, or interference fit, and the end of the connecting handle away from the adjusting handle is provided with a pipe joint, wherein the end of the pipe joint is provided with an anti-detachment structure.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by this invention are as follows: 1. This application employs a ball-head integrated irrigation head with an end guide groove structure, allowing for continuous multi-angle adjustment of the spray direction. This adapts to curved, narrow, and concealed root canal morphologies, eliminating irrigation blind spots and improving root canal cleaning and disinfection. Furthermore, the external drug delivery mechanism at the connection end allows for root canal irrigation, while the external negative pressure suction device enables negative pressure aspiration, making it suitable for a wide range of applications. Moreover, the nozzle structure is designed to be compatible with commonly available root canal irrigation needles, further enhancing its versatility.

[0017] 2. The sealing ring fits snugly against the spherical surface of the ball head, providing rotational damping while preventing leakage. This allows the flushing head to be stably locked after angle adjustment, balancing steering flexibility with reliable posture maintenance.

[0018] 3. The handle integrates a push-button regulating valve, which controls the flow area through the pressing stroke to achieve start / stop and stepless flow adjustment. Combined with the limit guide structure, it ensures accurate conduction of maximum flow, making the operation intuitive and the response rapid.

[0019] 4. A screw-in pressure regulating block is added, which allows for independent fine-tuning of the fluid flow channel cross-sectional area at the hand end to control the irrigation pressure, reduce the risk of sudden pressure rise in the root canal, and improve treatment safety.

[0020] 5. The whole unit adopts a segmented, detachable, and modular design. The rinsing head, handle, and connecting handle can all be quickly disassembled and assembled, facilitating cleaning, disinfection, and parts replacement. The interface has an anti-detachment structure, ensuring a stable connection and strong versatility. Attached Figure Description

[0021] Figure 1 This is an exploded view of the structure of a specific embodiment of the present invention; Figure 2 This is one of the structural schematic diagrams of a specific embodiment of the present invention; Figure 3 This is a second structural schematic diagram of a specific embodiment of the present invention; Figure 4 This is a front view of a specific embodiment of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure at point AA; Figure 6 For the present invention Figure 5 Enlarged view of section B; Figure 7 For the present invention Figure 5 Enlarged view of section C; Figure 8 This is a schematic diagram of the regulating valve in a specific embodiment of the present invention.

[0022] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0023] In the attached diagram: 1. Fixed sleeve; 2. Rotating sleeve; 21. Guide groove; 3. Ball head; 31. Nozzle; 4. Sealing ring; 5. Mounting base; 6. Adjusting handle; 61. Extension; 62. Adjusting valve; 621. Connecting channel; 622. Limiting guide groove; 63. Elastic element; 64. Drainage connector; 65. Pressure regulating block; 7. Connecting handle; 71. Pipe joint. Detailed Implementation

[0024] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0026] Furthermore, in the description of this invention, it should be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," "specific example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] Traditional root canal irrigation instruments are mostly fixed-angle structures with no adjustable nozzle direction, making them unsuitable for curved, narrow, or concealed root canal shapes. This can easily create irrigation blind spots, affecting the effectiveness of debridement and disinfection. Furthermore, they commonly suffer from insufficient reliability of the ball-head rotation seal, easy leakage of the fluid path, and inadequate nozzle positioning stability. In addition, traditional devices typically rely on external equipment for flow and pressure control, making handheld adjustments difficult and limiting operational continuity, increasing the difficulty of clinical procedures and the risk of sudden pressure spikes within the root canal.

[0030] In this regard, refer to Figures 1-8 This application discloses an irrigation device for root canal treatment of pulpitis. The device includes a handle assembly with an irrigation end and a connection end at its two ends. An irrigation head assembly is rotatably connected to the irrigation end, and the direction of the liquid jet can be adjusted by rotating and adjusting the irrigation head assembly.

[0031] For ease of understanding, the following explains some key terms in this embodiment: The handle assembly, which is designed as the main body for the operator to hold, can integrate fluid channels and other control mechanisms.

[0032] The flushing end, located at one end of the handle assembly, primarily functions to connect to the flushing head assembly and guide the liquid flow to it.

[0033] The connection end, located at the other end of the handle assembly, is primarily used to connect to an external liquid supply source or extension line to introduce flushing fluid.

[0034] The irrigation head assembly, located at the irrigation end, is the part that directly contacts the inside of the root canal and sprays irrigation fluid; its structural design allows for directional adjustment.

[0035] This embodiment provides an irrigation device for root canal treatment of pulpitis. The main structure of the device includes a handle assembly, which can be ergonomically designed to facilitate prolonged gripping and control of the device by the operator. For example, the handle assembly can be made of plastic, metal, or composite material, and its interior can be hollow to accommodate liquid channels or control mechanisms.

[0036] The handle assembly has a flushing end and a connection end at each end. The flushing end is in the direction of liquid spraying and is designed to connect to the flushing head assembly. The connection end is used to connect to an external liquid supply system, such as introducing flushing fluid through a hose or rigid tube. The flushing end and connection end can be connected to the corresponding components using threaded connections, snap-fit ​​connections, or press-fit methods.

[0037] The flushing end is rotatably connected to a flushing head assembly. The flushing head assembly can be a separate component, with one end connected to the flushing end and the other end having a spray nozzle. The rotatable connection can be implemented in various ways; for example, the base of the flushing head assembly can be designed as spherical or cylindrical and housed in a corresponding cavity inside the flushing end, achieving rotation through friction engagement or a simple bearing structure.

[0038] The direction of the liquid jet can be adjusted by rotating the irrigation head assembly. For example, the operator can manually rotate the irrigation head assembly to point the jet at different angles, thereby guiding the irrigation fluid to specific areas within the root canal. This rotational adjustment can be continuous, allowing adjustment within a certain angle range, or it can be segmented, using a locking structure to switch preset angles.

[0039] The irrigation device for root canal treatment of pulpitis in this embodiment features a rotatable and adjustable irrigation head assembly, allowing for adjustment of the liquid spray direction. This effectively solves the problem of traditional devices having fixed nozzle directions, making it difficult to adapt to complex root canal morphologies and creating irrigation blind spots. As a result, the irrigation fluid can be guided to various areas within the root canal, improving the completeness of debridement and disinfection, as well as its compatibility with the root canal morphology. This, in turn, enhances the overall effectiveness of root canal treatment and improves risk control during the procedure.

[0040] In some embodiments described above in this application, an irrigation device for root canal treatment of pulpitis is proposed, wherein an irrigation head assembly is rotatably connected to the irrigation end, and the direction of liquid spray is adjusted by rotating the irrigation head assembly. However, in practical applications, relying solely on a simple rotational connection may result in a lack of precise guidance and stability in the adjustment of the irrigation head assembly, making it difficult for the operator to accurately control the direction of liquid spray, thereby affecting the accuracy and efficiency of the treatment.

[0041] In this regard, refer to Figures 1-6This application further proposes that the flushing head assembly includes a ball head 3 and a nozzle 31. The ball head 3 and the nozzle 31 are integrally formed and have a connected spray channel. The flushing end is provided with a connector for connecting the ball head 3. The connector includes a rotating sleeve 2 sleeved on the outside of the flushing head assembly. The end of the rotating sleeve 2 is provided with a guide groove 21. The guide groove 21 is clearance-fitted with the nozzle 31 to provide an angle adjustment path for the nozzle 31.

[0042] Specifically, the ball head 3, as the core rotating component of the flushing head assembly, features a spherical surface design designed for flexible rotation at multiple angles. The nozzle 31 is the outlet for liquid jetting, and its structure determines the jetting pattern and direction. The two are integrally molded, meaning they are formed as a single unit through a single manufacturing process, such as precision injection molding or 3D printing. This integrated design effectively eliminates gaps between components, reducing the risk of liquid leakage and enhancing the overall strength and durability of the structure. Simultaneously, the ball head 3 and nozzle 31 have interconnected jetting channels, ensuring smooth delivery of the flushing fluid from the handle assembly to the nozzle 31 and outwards. The flushing end has a connector for connecting the ball head 3, a key structure for achieving mechanical connection between the ball head 3 and the flushing end and allowing its rotation. Specifically, this connector includes a rotating sleeve 2 fitted onto the outside of the flushing head assembly. The rotating sleeve 2 is typically made of medical-grade polymer material or metal, and its internal structure forms a rotational fit with the ball head 3, providing stable support and a rotational interface for the ball head 3. A guide groove 21 is provided at the end of the rotating sleeve 2. The guide slot 21 is a specifically shaped opening on the rotating sleeve 2 used to guide the movement of the nozzle 31. It can be arc-shaped, straight, or a composite curve, and its design directly determines the adjustable angle range of the nozzle 31. The guide slot 21 and the nozzle 31 are fitted with a clearance, meaning the size of the guide slot 21 is slightly larger than the corresponding size of the nozzle 31. This allows the nozzle 31 to slide or rotate smoothly within the slot while being effectively restricted by the edge of the slot. This fit provides the nozzle 31 with a clear angle adjustment path, ensuring that the nozzle 31 moves along a preset trajectory during adjustment and avoiding disordered rotation.

[0043] Through the above technical solution, this application provides a compact, intuitive, and precisely adjustable spray direction adjustment mechanism. The integrated design of the ball head 3 and nozzle 31, combined with the guide groove 21 on the rotating sleeve 2 and the clearance fit between the guide groove 21 and the nozzle 31, constitutes a flushing head assembly with a clearly defined angle adjustment path. The spherical structure of the ball head 3 provides the flushing head assembly with multi-dimensional rotational capabilities, while the guide groove 21 acts as a mechanical guide, precisely limiting the movement trajectory of the nozzle 31. This allows the operator to rotate the flushing head assembly to move the nozzle 31 along the path of the guide groove 21, thereby achieving stable and controllable adjustment of the liquid spray direction. This design effectively solves the problems of inaccurate adjustment and poor stability that may result from traditional simple rotating connections, significantly improving the accuracy of rinsing fluid spraying and the ease of operation during pulpitis root canal treatment. The integrated structure also reduces the number of parts, lowers the risk of leakage, and improves the overall reliability and hygiene of the device.

[0044] In some embodiments of this application, the flushing head assembly is connected to the flushing end of the handle assembly via a rotating sleeve, thereby adjusting the direction of liquid spray. However, in actual use, ensuring a secure and reliable connection between the rotating sleeve and the handle assembly, preventing loosening or detachment due to operation or external impact, while simultaneously ensuring smooth rotation and precise positioning of the flushing head assembly, is a problem that needs to be solved.

[0045] In this regard, refer to Figures 1-6 This application further proposes that it also includes a fixing sleeve 1, which is sleeved on the outside of the rotating sleeve 2 and is used to fix the rotating sleeve 2 to the rinsing end of the handle assembly.

[0046] Specifically, the fixing sleeve 1 is a tubular structure whose main function is to provide structural support and fixation. This sleeve can be made of various materials, such as medical-grade stainless steel, high-strength engineering plastics, or ceramic materials, to meet requirements for strength, corrosion resistance, and biocompatibility. Its manufacturing process may include precision casting, machining, or injection molding. The fixing sleeve 1 forms a coaxial structure with the rotating sleeve 2 through a sleeve-like arrangement, constraining and supporting the rotating sleeve 2 from the outside. This sleeve-like relationship can be achieved in various ways; for example, the inner wall of the fixing sleeve 1 and the outer wall of the rotating sleeve 2 can be connected by interference fit, keyway fit, or by bonding, welding, etc., to ensure that their relative positions are fixed or to provide sufficient support. The core function of the fixing sleeve 1 is to securely install the rotating sleeve 2 onto the flushing end of the handle assembly. This fixed installation can be achieved through various mechanical connection methods; for example, the fixing sleeve 1 can be reliably connected to the flushing end of the handle assembly through threaded connection, snap-fit ​​connection, pin fixation, or press-fit. With this fixing method, the rotating sleeve 2 obtains stable support on the handle assembly, thereby ensuring the overall structural integrity and operational stability of the flushing head assembly during rotation adjustment.

[0047] By introducing a fixed sleeve 1 and fitting it around the outside of the rotating sleeve 2, this application effectively solves the problem of unstable connection between the rotating sleeve 2 and the rinsing end of the handle assembly. The fixed sleeve 1 provides a solid external support and fixing structure for the rotating sleeve 2, thereby ensuring reliable installation of the rotating sleeve 2 on the handle assembly. This not only significantly improves the overall stability of the rinsing head assembly when adjusting the spray direction, avoiding loosening or accidental detachment due to operating force or liquid pressure, but also makes the rotation adjustment process of the rinsing head assembly smoother and the positioning more precise, thereby improving the reliability and ease of operation of the device and ensuring the accuracy of rinsing fluid spraying during pulpitis root canal treatment.

[0048] In some embodiments of this application, an irrigation device for root canal treatment of pulpitis is proposed, wherein an irrigation head assembly is rotatably connected to the irrigation end, and the direction of liquid spraying is adjusted by rotating the irrigation head assembly. However, in practical applications, if the connection between the irrigation head assembly and the handle assembly is not sealed tightly, liquid leakage may occur, affecting the treatment effect and operational hygiene. At the same time, if the irrigation head assembly cannot stably maintain its posture after rotation adjustment, it is prone to accidental rotation during use, thereby affecting the accuracy of the spray direction and reducing the convenience and safety of operation.

[0049] In this regard, refer to Figures 1-6Furthermore, this application proposes that the handle assembly is provided with a liquid flow channel that runs through the injection channel, and a sealing component is provided between the output end of the liquid flow channel and the input end of the injection channel. One end face of the sealing component is tightly fitted with the outer surface of the ball head 3, which achieves a sealing effect while increasing the resistance to the rotation of the ball head 3 and improving the stability of the nozzle 31 posture.

[0050] Specifically, the fluid flow channel within the handle assembly primarily functions to provide a path for the flushing liquid to travel from the handle assembly to the flushing head assembly. This flow channel is typically designed as a pipe or cavity running through the handle assembly, ensuring smooth liquid flow and ultimately entering the spray channel of the flushing head assembly. The output end of the flow channel is the interface where the liquid leaves the handle assembly and enters the flushing head assembly, while the input end of the spray channel is the interface where the flushing head assembly receives the liquid. The sealing assembly is a crucial component located between the output end of the flow channel and the input end of the spray channel, its main function being to prevent liquid leakage at the connection point. This sealing assembly is typically made of elastic and corrosion-resistant materials, such as rubber, silicone, or polytetrafluoroethylene (PTFE), to ensure good sealing performance under liquid pressure. One end face of the sealing assembly is designed to fit tightly against the outer surface of the ball head 3. This tight fit not only effectively prevents liquid from overflowing from the connection point, achieving a reliable seal, but also provides resistance to the rotation of the ball head 3 through the friction between the materials. This resistance is carefully designed to ensure that the ball head 3 can rotate smoothly to adjust the spray direction, while preventing it from rotating unexpectedly when subjected to slight external forces or liquid impacts. By increasing the resistance to the rotation of the ball head 3, the stability of the nozzle 31's posture can be significantly improved, ensuring that once the nozzle 31 is adjusted to the required angle, it can remain stably in that position without easily deviating.

[0051] Through the above technical solution, a reliable connection is achieved between the fluid flow channel inside the handle assembly and the spray channel of the irrigation head assembly via a sealing component. One end face of the sealing component fits tightly against the outer surface of the ball head 3, forming an effective seal, thereby completely solving the problem of fluid leakage and ensuring the hygiene and safety of the treatment process. Simultaneously, the friction generated by this tight fit provides moderate resistance to the rotation of the ball head 3, allowing the operator to feel a clear sense of positioning when adjusting the spray direction of the nozzle 31. Once adjusted, the nozzle 31 can stably maintain its posture, avoiding spray direction deviation caused by accidental rotation during use, greatly improving the accuracy and convenience of the operation, and ensuring the smooth progress of root canal treatment.

[0052] In response, this application proposes an irrigation device for root canal treatment of pulpitis. In some of the above embodiments, the irrigation device achieves a sealing effect and increases the rotational resistance of the ball head 3 by setting a sealing component, making one end face of the component tightly fit with the outer surface of the ball head 3, thereby improving the stability of the nozzle 31's posture. However, in practical applications, how to ensure a long-term, reliable, and tight fit between the sealing component and the ball head 3, while facilitating assembly and maintenance and effectively preventing liquid leakage, is a technical problem that needs further resolution.

[0053] To address the aforementioned problems, this application further optimizes the structure of the sealing assembly. (Refer to...) Figure 1 and Figure 6 Specifically, the sealing assembly includes a sealing ring 4 and a mounting base 5. The sealing ring 4 is typically made of a material with good elasticity and corrosion resistance, such as silicone rubber, fluororubber, or nitrile rubber. Its main function is to form an effective sealing barrier through its elastic deformation when in contact with the annular end face of the ball head 3, preventing liquid leakage from the flow channel. Simultaneously, the friction between it and the ball head 3 helps provide the damping required for the rotation of the ball head 3, thereby stabilizing the posture of the nozzle 31. The mounting base 5, as a structural support component of the sealing assembly, is typically made of engineering plastics or metal. Its internal structure is designed to accommodate and fix the sealing ring 4 and other sealing rubber rings.

[0054] To ensure the secure installation of the mounting base 5, the end of the handle assembly is provided with a trapezoidal frustum for fixing the mounting base 5. The shape of this trapezoidal frustum is designed to provide a stable and guiding mounting base for the mounting base 5, ensuring accurate alignment during installation and providing sufficient contact area for a firm fixation, such as through interference fit, threaded connection, or snap-fit ​​connection. The mounting base 5 is fitted onto the outer side of the trapezoidal frustum, forming a tight fit. This fit not only aids in the positioning and fixation of the mounting base 5 but also enhances the structural strength and stability of the entire sealing assembly to a certain extent, preventing loosening or displacement during long-term use or under stress.

[0055] To further enhance the sealing effect, several sealing rubber rings are spaced apart on the inner wall of the mounting base 5. These auxiliary sealing rubber rings form multiple sealing barriers, effectively preventing liquid leakage along the gap between the mounting base 5 and the trapezoidal frustum. They are typically O-rings or other irregularly shaped sealing rings, achieving sealing through compression deformation. Furthermore, the end of the mounting base 5 is provided with a socket for fitting the sealing rubber ring 4. The internal shape and size of this socket match the outer shape of the sealing rubber ring 4, precisely accommodating and positioning it. This design ensures that the sealing rubber ring 4 contacts the annular end face of the ball head 3 in the correct orientation and position, thereby guaranteeing the uniformity and stability of the sealing effect and rotational resistance. Finally, the annular end face of the sealing rubber ring 4 fits tightly against the ball head 3, which is the key contact interface for achieving sealing and damping. The annular end face of the sealing rubber ring 4 is designed to match the outer surface shape of the ball head 3, achieving a gapless, tight contact through pre-tightening force or elastic deformation.

[0056] Through the above technical solution, the structure of the sealing assembly has been significantly optimized, including a sealing rubber ring 4 and a mounting base 5. The trapezoidal frustum at the end of the handle assembly provides a stable mounting base for the mounting base 5, allowing it to be reliably fitted and fixed. Several sealing rubber rings spaced apart on the inner wall of the mounting base 5 work in conjunction with the main sealing rubber ring 4 to construct multiple sealing barriers, significantly improving the sealing reliability of the entire device and effectively preventing liquid leakage. At the same time, the socket at the end of the mounting base 5 precisely positions and supports the sealing rubber ring 4, ensuring that the annular end face of the sealing rubber ring 4 can continuously and uniformly fit tightly against the ball head 3. This tight fit not only ensures excellent sealing performance, but more importantly, the stable friction between the sealing rubber ring 4 and the ball head 3 effectively increases the resistance to the rotation of the ball head 3, allowing the flushing head assembly to stably maintain a preset posture after adjusting the spray direction, avoiding accidental displacement caused by operation or external factors, thereby greatly improving the accuracy and safety of the flushing operation.

[0057] In some embodiments described above in this application, an irrigation device for root canal treatment of pulpitis is proposed, wherein an irrigation head assembly is rotatably connected to the irrigation end, and the direction of liquid spray is adjusted by rotating and adjusting the irrigation head assembly. However, in its implementation, no specific implementation method is given for the flow control and start / stop operation of the irrigation liquid, which may lead to inconvenience in operation or inability to accurately control the irrigation process, thus affecting the treatment effect.

[0058] In this regard, refer to Figure 1 , Figures 6-8This application further proposes that the handle assembly includes an adjustment assembly, which includes an adjustment handle 6. The side wall of the adjustment handle 6 is provided with a mounting hole extending into the liquid flow channel. A push-type adjustment valve 62 is slidably connected in the mounting hole. The adjustment valve 62 is provided with a connecting channel 621 for connecting the liquid flow channel. An elastic element 63 is fixedly connected between the adjustment valve 62 and the adjustment handle 6. By pressing the adjustment valve 62, it slides in the mounting hole to have a first position where the connecting channel 621 connects to the liquid flow channel and a second position where the connecting channel 621 does not connect to the liquid flow channel. The flow rate can be adjusted by controlling the overlapping area of ​​the connecting channel 621 and the liquid flow channel.

[0059] The regulating component is the core mechanism within the handle assembly used to control the liquid flow rate. Its main function is to provide an operable interface and internal mechanism to achieve precise start / stop and flow regulation of the flushing liquid. The regulating handle 6, as the external body of the regulating component, is typically designed as an ergonomic handheld part, with mounting holes on its sidewalls to accommodate and guide the movement of the regulating valve 62. The regulating handle 6 can be made of medical-grade plastic or metal to ensure corrosion resistance and biocompatibility. The mounting hole penetrates the sidewall of the regulating handle 6 and connects to the liquid flow channel; its internal surface should have a high degree of smoothness to ensure smooth sliding of the push-button regulating valve 62. The size and shape of the mounting hole must precisely match the regulating valve 62 to ensure good sealing performance and a stable sliding path. The push-button regulating valve 62 is a valve body that slides axially along the mounting hole. Its main function is to control the opening and closing of the liquid flow channel and the flow rate based on the operator's pressing action. This valve body is typically made of wear-resistant and corrosion-resistant materials, such as medical-grade polymers or stainless steel. The connecting channel 621 is one or more holes or channels located inside or on the side wall of the push-button regulating valve 62. Its design dimensions and position determine the overlapping area with the liquid flow channel, thus directly affecting the liquid flow rate. The shape of this channel can be circular, elliptical, or slit-shaped to achieve different flow regulation characteristics. The elastic element 63 is typically a spring, such as a helical compression spring, with one end fixedly connected to the regulating valve 62 and the other end fixedly connected to the inner wall of the regulating handle 6. The function of the elastic element 63 is to provide a restoring force so that the regulating valve 62 can automatically return to the preset closed or minimum flow position when there is no external pressing action, thereby preventing accidental liquid outflow. The first position refers to the state where the push-button regulating valve 62 is pressed to a certain extent, and the connecting channel 621 is fully or partially aligned with the liquid flow channel, allowing liquid to flow out from the liquid flow channel. In this position, the flow rate can be continuously adjusted by the depth of pressing. The second position refers to the state where the press-type regulating valve 62 is in an unpressed state under the action of the elastic element 63, or when it is pressed to a specific position. In this state, the connecting channel 621 is not connected to the liquid flow channel, or only weakly connected, thereby preventing or greatly restricting the flow of liquid. This is usually the default closed state of the device. Flow rate regulation can be achieved by controlling the overlapping area of ​​the connecting channel 621 and the liquid flow channel; this mechanism is key to achieving precise flow control. When the operator presses the regulating valve 62, the valve slides within the mounting hole, and the connecting channel 621 gradually aligns with the liquid flow channel, with the overlapping area increasing with the pressing depth. The larger the overlapping area, the smaller the flow resistance and the greater the flow rate; conversely, the smaller the overlapping area, the smaller the flow rate. This design allows the operator to achieve fine, stepless, or graded adjustment of the irrigation fluid flow rate according to actual treatment needs by adjusting the pressing force and depth.

[0060] Through the above technical solution, this application provides an intuitive and precise liquid flow control mechanism. The operator can press the regulating valve 62, causing it to slide within the mounting hole, thereby changing the overlap area between the connecting channel 621 and the liquid flow channel. This allows for fine adjustment of the irrigation liquid flow rate according to treatment needs, from completely closed to maximum flow, greatly improving operational flexibility and precision. The elastic element 63 ensures that the regulating valve 62 automatically resets to a preset position (e.g., closed) after the press is released, effectively preventing misoperation or accidental continuous irrigation, thus enhancing the safety of the device. This press-type adjustment method, combined with flow regulation, makes irrigation operations during pulpitis root canal treatment more convenient and efficient, and can provide customized irrigation intensity according to different root canal conditions, optimizing treatment outcomes.

[0061] In some of the embodiments described above in this application, a press-type regulating valve is proposed to control the flow rate of liquid. However, in actual implementation, if there is a lack of precise guiding and limiting mechanisms, the sliding of the regulating valve may not be stable enough, making it difficult to ensure that the connecting channel and the liquid flow channel can be completely and accurately aligned and connected when the maximum flow rate is required. This may result in unstable flow output or failure to achieve the expected maximum flushing effect. This is a problem that needs to be solved for pulpitis root canal treatment, which requires precise control of liquid flow rate.

[0062] In this regard, this application further proposes that, in order to optimize the accuracy and stability of flow regulation in the aforementioned flushing device, a drain connector 64 is fixedly connected within the liquid flow channel. This drain connector 64, as part of the liquid flow channel, is hollow inside and is used to guide the liquid outflow. It cooperates with the connecting channel 621 on the regulating valve 62 to jointly achieve precise flow control. Simultaneously, the side wall of the regulating valve 62 is provided with a limiting guide groove 622. This limiting guide groove 622 is a groove formed along the axial direction on the side wall of the regulating valve 62. Its function is to provide a stable sliding path and precise limiting function for the drain connector 64, ensuring that the drain connector 64 can move along a preset trajectory during the pressing process of the regulating valve 62, preventing deviation. The connecting channel 621 is located within the limiting guide groove 622 and at its uppermost end. This arrangement allows the communication area between the connecting channel 621 and the drain connector 64 to be controllable when the regulating valve 62 is in its initial position or partially pressed, providing a basis for flow regulation. The end of the drain connector 64 slides into the limiting guide groove 622. This engagement ensures that during the pressing process of the regulating valve 62, the drain connector 64 is always precisely guided by the limiting guide groove 622, maintaining the correct relative position. This ensures effective communication between the connecting channel 621 and the drain connector 64, and smooth flow regulation. When sufficient downward pressure is applied to the regulating valve 62, the regulating valve 62 can reach its maximum downward displacement, which is precisely limited by the structure or length of the limiting guide groove 622. In this maximum displacement state, the connecting channel 621 can fully connect to the drain connector 64. This means that the connecting channel 621 and the drain connector 64 are completely aligned and connected, allowing the liquid to pass through at maximum flow rate, ensuring sufficient flushing effect.

[0063] Through the above technical solution, the drain connector 64, fixedly connected within the fluid flow channel, forms a precise guiding and limiting structure with the limiting guide groove 622 on the side wall of the regulating valve 62 and the connecting channel 621 located therein. The sliding fit between the end of the drain connector 64 and the limiting guide groove 622 effectively prevents the regulating valve 62 from shaking or deviating during the pressing process, ensuring precise alignment between the connecting channel 621 and the drain connector 64. When the operator applies sufficient downward pressure to make the regulating valve 62 reach its maximum downward displacement, the connecting channel 621 can reliably and fully connect the drain connector 64, thereby ensuring that the liquid can be output at a stable and repeatable maximum flow rate. This design greatly improves the accuracy and reliability of flow regulation, especially when the maximum flushing flow rate is required, ensuring a stable and sufficient supply of flushing fluid and avoiding insufficient flow due to misalignment or partial blockage, thereby improving the efficiency and effectiveness of root canal treatment for pulpitis.

[0064] In some embodiments described above in this application, an irrigation device for root canal treatment of pulpitis is proposed, wherein the rotation adjustment of the irrigation head assembly can change the direction of liquid spray. However, in actual root canal treatment, different treatment stages or different patients' root canal conditions may require irrigation fluid with different pressures. Simply adjusting the spray direction cannot meet the need for precise control of the irrigation fluid pressure, which may lead to poor irrigation effect or unnecessary damage to the root canal tissue.

[0065] In this regard, this application further proposes an irrigation device for root canal treatment of pulpitis, wherein the side wall of the adjusting handle 6 is provided with an adjusting hole that extends into the fluid flow channel, and a pressure adjusting block 65 is threadedly connected inside the adjusting hole. By rotating the adjusting block 65 to adjust the length of the fluid flow channel, the cross-sectional area of ​​the fluid flow channel is adjusted, thereby adjusting the pressure of the fluid flowing through the fluid flow channel.

[0066] Specifically, the adjusting handle 6 is part of the handle assembly, and the adjusting hole on its side wall is for introducing the pressure regulating mechanism. This adjusting hole penetrates the wall thickness of the adjusting handle 6 and connects to the internal fluid flow channel of the device. Its function is to provide a passage for the pressure regulating block 65 to enter the fluid flow channel, thereby enabling intervention in the fluid flow channel. This adjusting hole is typically designed with internal threads to mate with the threaded structure of the pressure regulating block 65. The pressure regulating block 65 is a movable component, and its outer surface is typically threaded to match the internal threads of the adjusting hole. By rotating the pressure regulating block 65, it can be moved axially within the adjusting hole, thereby changing its depth into the fluid flow channel. The pressure regulating block 65 can have various shapes, such as cylindrical, conical, or rod-shaped with a specific cross-sectional shape, designed to effectively change the effective cross-sectional area of ​​the fluid flow channel. When the pressure regulating block 65 is rotated deeper into the fluid flow channel, it occupies a portion of the fluid flow channel's space, thus reducing the effective flow cross-sectional area of ​​the fluid flow channel. Conversely, when the pressure regulating block 65 exits the fluid flow channel, the cross-sectional area of ​​the fluid flow channel increases. This change in cross-sectional area directly affects the resistance to fluid flow, and thus affects the fluid pressure.

[0067] Through the above technical solution, an adjustment hole extending into the fluid flow channel is provided on the side wall of the adjustment handle 6, and a pressure adjustment block 65 is threadedly connected therein. The operator can rotate the pressure adjustment block 65 to move it within the adjustment hole, thereby changing its length entering the fluid flow channel. This change in length directly leads to a change in the effective cross-sectional area of ​​the fluid flow channel. When the cross-sectional area of ​​the fluid flow channel decreases, the resistance to fluid flow increases, thereby increasing the fluid pressure flowing through the fluid flow channel; conversely, when the cross-sectional area increases, the fluid pressure decreases. This design enables the irrigating device to achieve precise and continuous adjustment of the irrigating hydraulic pressure, overcoming the limitations of the lack of pressure control in existing technologies. In root canal treatment for pulpitis, the operator can flexibly adjust the pressure of the irrigating fluid according to the anatomical structure of the root canal, the degree of infection, and the stage of treatment, ensuring that the irrigating fluid can effectively reach the deep root canal to remove infected material, while avoiding damage to the periapical tissues due to excessive pressure, significantly improving the safety and effectiveness of the treatment.

[0068] In response, this application proposes an irrigation device for root canal treatment of pulpitis, with its handle assembly serving as the main operating component. In practical use, cleaning, disinfecting, and replacing parts of the irrigation device are routine operations. However, if the handle assembly is fixedly connected to other parts of the irrigation device, these operations become complex and time-consuming, which is detrimental to the maintenance and hygiene management of the device.

[0069] To solve the above problems, refer to Figure 1 This application further proposes that the adjusting handle 6 has an extension 61 at one end near the fixed sleeve 1, and the extension 61 is detachably connected to the fixed sleeve 1. The detachable connection method can be any one of threaded connection, snap-fit, or interference fit.

[0070] Specifically, the adjusting handle 6 is part of the handle assembly for user gripping and operation. An extension 61 is provided at one end of the adjusting handle 6 near the fixed sleeve 1. This extension 61 serves as a connection structure between the adjusting handle 6 and the fixed sleeve 1, designed to provide a clear connection interface for easy subsequent detachment. The extension 61 can be a cylindrical, conical, or geometrically specific structure, its size and shape matching the internal structure of the fixed sleeve 1 to ensure connection stability and reliability.

[0071] The connection between the extension 61 and the fixed sleeve 1 is not permanent but designed to be detachable. This means that when needed, the user or maintenance personnel can easily detach the adjusting handle 6 from the fixed sleeve 1, and vice versa. This detachable connection can be implemented in various ways, but its core purpose is to provide a mechanism that allows for repeated connection and disconnection without damaging the components.

[0072] Detachable connections can be achieved using any of the following methods: threaded connection, snap-fit, or interference fit. A threaded connection is a common type of detachable connection. External and internal threads are provided on the extension 61 and the fixed sleeve 1, respectively, allowing for tightening and loosening through rotation. This method offers the advantages of a strong connection and easy disassembly. A snap-fit ​​connection achieves the connection through elastic deformation or mechanical locking. For example, a snap-fit ​​is provided on the extension 61, and a corresponding slot is provided on the fixed sleeve 1, allowing for connection and separation through pressing or rotation. An interference fit occurs when the outer diameter of the extension 61 is slightly larger than the inner diameter of the fixed sleeve 1, achieving a tight fit through pressing or thermal expansion. Although disassembly may require some force or special tools, its connection strength is high, and it is still considered a form of detachable connection in certain applications. The choice of connection method depends on specific design requirements, such as connection strength, disassembly frequency, and ease of operation.

[0073] By providing an extension 61 at one end of the adjusting handle 6 near the fixed sleeve 1, and detachably connecting the extension 61 to the fixed sleeve 1 using methods such as threaded connection, snap-fit, or interference fit, this flushing device achieves a modular design for the handle assembly. This design allows the adjusting handle 6 to be easily removed from the fixed sleeve 1, facilitating thorough cleaning and disinfection of the flushing device, effectively avoiding the risk of cross-infection and improving medical safety. Simultaneously, when a part of the handle assembly is damaged or requires upgrading, only the damaged or upgraded part can be replaced without replacing the entire device, reducing maintenance costs. Furthermore, the modular design provides customized handle options for different users, enhancing the user experience. This detachable connection significantly improves the device's maintenance convenience, hygiene safety, and the economy of component replacement, effectively solving many inconveniences associated with traditional one-piece handles in terms of cleaning, maintenance, and component replacement.

[0074] In some embodiments described above, an irrigation device for root canal treatment of pulpitis is proposed, comprising a handle assembly with an irrigation end and a connection end at its two ends. An irrigation head assembly is rotatably connected to the irrigation end, and the direction of liquid jet can be adjusted by rotating the irrigation head assembly. However, in practical applications, the length of the handle assembly, the connection method, and the interface with an external fluid source may need to be flexibly adjusted according to different operating habits, treatment scenarios, or external devices to improve the versatility and ease of operation of the device.

[0075] In this regard, refer to Figures 1-5 This application further proposes that the end of the adjusting handle 6 away from the flushing head assembly is detachably connected to a connecting handle 7. The detachable connection method is any one of threaded connection, snap-fit, or interference fit. The end of the connecting handle 7 away from the adjusting handle 6 is provided with a pipe connector 71, and the end of the pipe connector 71 is provided with an anti-detachment structure.

[0076] Specifically, the adjusting handle 6, as part of the handle assembly, has its end furthest from the rinsing head assembly designed to be detachably connected to the connecting handle 7. This design allows the overall length or shape of the handle assembly to be adjusted according to actual needs. For example, a longer handle can be connected when a longer grip or operating distance is required; a shorter connecting handle 7 can be connected or left unconnected when space is limited or a more compact structure is needed. This modular design enhances the adaptability of the device and the user experience.

[0077] The detachable connection methods offer a variety of options to adapt to different usage scenarios and manufacturing requirements. Threaded connections achieve connection and separation through thread engagement, featuring a strong connection, easy disassembly, and good reusability, suitable for applications requiring frequent disassembly and reliable connection. Snap-fit ​​connections utilize elastic deformation or structural fit to achieve quick insertion, removal, and locking, offering simple and fast operation, suitable for scenarios requiring rapid replacement or assembly. Interference fits create an interference fit through dimensional tolerances between parts, forming a tight connection, featuring a compact structure and reliable connection, suitable for applications requiring high connection strength and not requiring frequent disassembly. All these connection methods ensure a stable connection between the connecting handle 7 and the adjusting handle 6, while allowing for convenient disassembly and replacement when needed.

[0078] The end of the connecting handle 7 furthest from the adjusting handle 6 is provided with a pipe connector 71, which is an interface for connecting the irrigation device to an external fluid supply line. It is typically designed with a standardized interface form to ensure compatibility with various common medical or laboratory tubing. The pipe connector 71 allows fluid to flow smoothly from the external supply system into the fluid flow channel of the irrigation device, providing a continuous irrigation solution for root canal treatment.

[0079] To ensure a secure connection, the end of the pipe fitting 71 is equipped with an anti-detachment structure. This anti-detachment structure is designed to prevent accidental detachment of the pipe fitting 71 after it is connected to the external fluid supply line, thereby avoiding leakage of flushing fluid or interruption of supply. Common anti-detachment structures may include barbs, snaps, locking rings, threaded locking caps, or O-rings. For example, a structure with barbs can be used, which will lock the external pipe in place when it is inserted, preventing it from retracting; or a threaded locking cap can be used to secure the external pipe to the pipe fitting 71 by tightening. This structure is crucial for maintaining the stability and safety of the treatment process, especially during high-pressure flushing or frequent device movement.

[0080] Through the above technical solutions, the modularity and versatility of the flushing device are significantly improved. The detachable connecting handle 7 allows users to flexibly adjust the handle length and grip according to actual operational needs and personal habits, thereby improving operational comfort and precision. Multiple detachable connection options, such as threaded connections, snap-fits, or interference fits, make assembly and disassembly of the device more convenient while ensuring connection reliability. Furthermore, the pipe connector 71 at the end of the connecting handle 7, along with its anti-detachment structure, ensures a secure connection between the flushing device and the external liquid supply pipeline, effectively preventing liquid leakage or flushing interruption due to accidental detachment during treatment. This ensures the continuity and safety of treatment, enhancing the practicality and reliability of the device.

[0081] The following example will provide a more detailed explanation of the above technical solution: During a root canal treatment for pulpitis, the operator needs to thoroughly irrigate the patient's curved root canals. Traditional irrigation devices, due to their fixed nozzle direction, struggle to reach deep into the root canals, easily creating irrigation blind spots and affecting the cleaning effect. In this case, the operator chooses to use a new type of irrigation device specifically designed for root canal treatment of pulpitis.

[0082] The flushing device includes a handle assembly with a flushing end and a connection end at its two ends. The operator connects the device to an external liquid supply line via the connection end, and the liquid is delivered through a flow channel inside the handle assembly. A flushing head assembly is rotatably connected to the flushing end. This flushing head assembly is integrally formed from a ball head 3 and a nozzle 31, with a communicating spray channel between them. Unlike existing fixed-angle flushing devices, the flushing head assembly of this device can be rotated and adjusted, thereby changing the direction of the liquid spray.

[0083] Specifically, the irrigation end is equipped with a connector for connecting the ball head 3. This connector includes a rotating sleeve 2 that is sleeved on the outside of the irrigation head assembly. The end of the rotating sleeve 2 has a guide groove 21, which is clearance-fitted with the nozzle 31, providing an angle adjustment path for the nozzle 31. The operator can slightly rotate the irrigation head assembly with their fingers according to the actual shape of the root canal, allowing the nozzle 31 to flexibly adjust the spray angle under the guidance of the guide groove 21. This ensures that the irrigation fluid can reach all areas within the root canal, effectively removing infected tissue and debris, and avoiding the formation of irrigation blind spots.

[0084] To ensure the stability of the flushing head assembly after angle adjustment and the sealing of the liquid flow, a sealing component is provided between the liquid flow channel output end and the spray channel input end of the handle assembly. This sealing component includes a sealing ring 4 and a mounting base 5. The end of the handle assembly has a trapezoidal frustum for fixing the mounting base 5, and the mounting base 5 is fitted onto the outer side of the trapezoidal frustum, with several sealing rubber rings spaced apart on its inner wall. The end of the mounting base 5 also has a fitting for the sealing ring 4. The annular end face of the sealing ring 4 fits tightly against the outer surface of the ball head 3. This design not only achieves a reliable sealing effect, effectively preventing liquid leakage, but also increases the resistance to rotation of the ball head 3 through friction between the sealing ring 4 and the ball head 3, allowing the nozzle 31 to be stably maintained after adjustment to the desired posture, avoiding the problem of unstable nozzle positioning in traditional devices.

[0085] Furthermore, the device integrates convenient flow and pressure regulation functions. The handle assembly includes an adjustment component with an adjustment handle 6. The side wall of the adjustment handle 6 has a mounting hole extending into the liquid flow channel, within which a push-button regulating valve 62 is slidably connected. The regulating valve 62 has a connecting channel 621 for connecting to the liquid flow channel, and an elastic element 63 is fixedly connected between the regulating valve 62 and the adjustment handle 6. The operator presses the regulating valve 62, causing it to slide within the mounting hole. When the regulating valve 62 is in the first position, the connecting channel 621 connects to the liquid flow channel, and the liquid begins to flow; when the regulating valve 62 is in the second position, the connecting channel 621 is not connected to the liquid flow channel, and the liquid stops flowing. By controlling the overlapping area of ​​the connecting channel 621 and the liquid flow channel, the operator can precisely adjust the flow rate of the flushing fluid, avoiding the cumbersome process of relying on external equipment for flow control in traditional devices. A drain connector 64 is also fixedly connected inside the liquid flow channel. The side wall of the regulating valve 62 is provided with a limiting guide groove 622, and the connecting channel 621 is located inside the limiting guide groove 622 and at its uppermost end. The end of the drain connector 64 is slidably engaged with the limiting guide groove 622. When the operator applies sufficient downward pressure to the regulating valve 62, the regulating valve 62 reaches its maximum downward displacement, and the connecting channel 621 fully connects to the drain connector 64, achieving maximum flow output.

[0086] To further enhance the precision of the operation, the side wall of the adjusting handle 6 is also equipped with an adjusting hole that extends into the fluid flow channel. A pressure adjusting block 65 is threaded into the adjusting hole. The operator can adjust the length of the pressure adjusting block 65 entering the fluid flow channel by rotating it, thereby changing the cross-sectional area of ​​the fluid flow channel. The change in the cross-sectional area of ​​the fluid flow channel directly affects the pressure of the flowing fluid, allowing the operator to directly adjust the pressure of the irrigating fluid at the hand end, effectively avoiding the risk of sudden pressure rise within the root canal and improving the safety of the treatment.

[0087] The overall design of the device also considers maintainability and expandability. An extension 61 is located at the end of the adjusting handle 6 near the flushing head assembly. This extension 61 is detachably connected to the fixed sleeve 1, for example, via a threaded connection. A connecting handle 7 is detachably connected to the end of the adjusting handle 6 away from the flushing head assembly. A pipe connector 71 is located at the end of the connecting handle 7 away from the adjusting handle 6. The pipe connector 71 has an anti-detachment structure at its end to ensure a secure connection to an external pipe. This modular design facilitates the assembly, cleaning, and component replacement of the device.

[0088] With the above-mentioned irrigation device, operators can flexibly adjust the nozzle direction and precisely control the flow and pressure of the irrigation fluid, effectively solving the problems of irrigation blind spots, sealing leakage, unstable positioning, and inconvenient flow and pressure adjustment that exist in traditional devices in root canal treatment. It significantly improves the adaptability, ease of operation, and treatment safety of root canal irrigation.

[0089] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0090] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0091] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An irrigation device for root canal treatment of pulpitis, characterized in that, It includes a handle assembly, with a rinsing end and a connecting end at each end. The rinsing end is rotatably connected to a rinsing head assembly, and the direction of liquid spray can be adjusted by rotating and adjusting the rinsing head assembly.

2. The irrigation device for root canal treatment of pulpitis according to claim 1, characterized in that, The flushing head assembly includes a ball head (3) and a nozzle (31). The ball head (3) and the nozzle (31) are integrally formed and have a connected spray channel. The flushing end is provided with a connector for connecting the ball head (3). The connector includes a rotating sleeve (2) sleeved on the outside of the flushing head assembly. The end of the rotating sleeve (2) is provided with a guide groove (21). The guide groove (21) is clearance-fitted with the nozzle (31) to provide an angle adjustment path for the nozzle (31).

3. The irrigation device for root canal treatment of pulpitis according to claim 2, characterized in that, It also includes a fixing sleeve (1), which is sleeved on the outside of the rotating sleeve (2) and is used to fix the rotating sleeve (2) to the rinsing end of the handle assembly.

4. The irrigation device for root canal treatment of pulpitis according to claim 3, characterized in that, The handle assembly is provided with a liquid flow channel that communicates with the injection channel. A sealing component is provided between the output end of the liquid flow channel and the input end of the injection channel. One end face of the sealing component is tightly fitted with the outer surface of the ball head (3), which achieves a sealing effect while increasing the resistance to the rotation of the ball head (3) and improving the stability of the nozzle (31) posture.

5. The irrigation device for root canal treatment of pulpitis according to claim 4, characterized in that, The sealing assembly includes a sealing rubber ring (4) and a mounting base (5). The end of the handle assembly is provided with a trapezoidal frustum for fixing the mounting base (5). The mounting base (5) is sleeved on the outside of the trapezoidal frustum and the inner wall of the mounting base (5) is provided with several sealing rubber rings at intervals. The end of the mounting base (5) is provided with a sleeve for sleeved sealing rubber ring (4). The annular end face of the sealing rubber ring (4) is tightly fitted with the ball head (3).

6. The irrigation device for root canal treatment of pulpitis according to claim 4, characterized in that, The handle assembly includes an adjustment assembly, which includes an adjustment handle (6). The side wall of the adjustment handle (6) is provided with a mounting hole that extends through to the liquid flow channel. A push-type adjustment valve (62) is slidably connected in the mounting hole. The adjustment valve (62) is provided with a connecting channel (621) for connecting the liquid flow channel. An elastic element (63) is fixedly connected between the adjustment valve (62) and the adjustment handle (6). By pressing the adjustment valve (62), it slides in the mounting hole to have a first position where the connecting channel (621) connects to the liquid flow channel and a second position where the connecting channel (621) does not connect to the liquid flow channel. The flow rate can be adjusted by controlling the overlapping area of ​​the connecting channel (621) and the liquid flow channel.

7. The irrigation device for root canal treatment of pulpitis according to claim 6, characterized in that, A drain connector (64) is fixedly connected inside the liquid flow channel. The side wall of the regulating valve (62) is provided with a limiting guide groove (622). The connecting channel (621) is located inside the limiting guide groove (622) and at the uppermost end of the limiting guide groove (622). The end of the drain connector (64) is slidably engaged with the limiting guide groove (622). When sufficient downward pressure is applied to the regulating valve (62), the regulating valve (62) reaches the maximum downward displacement, and the connecting channel (621) is fully connected to the drain connector (64).

8. The irrigation device for root canal treatment of pulpitis according to claim 7, characterized in that, The side wall of the adjusting handle (6) is provided with an adjusting hole that extends through to the liquid flow channel. A pressure adjusting block (65) is threaded into the adjusting hole. By rotating the adjusting block (65) to adjust the length of the liquid flow channel, the cross-sectional area of ​​the liquid flow channel is adjusted, thereby adjusting the liquid pressure flowing through the liquid flow channel.

9. The irrigation device for root canal treatment of pulpitis according to claim 6, characterized in that, The adjusting handle (6) has an extension (61) at one end near the fixed sleeve (1). The extension (61) is detachably connected to the fixed sleeve (1). The detachable connection method can be any one of threaded connection, snap-fit, or interference fit.

10. The irrigation device for root canal treatment of pulpitis according to claim 6, characterized in that, The end of the adjusting handle (6) away from the flushing head assembly is detachably connected to a connecting handle (7). The detachable connection method is any one of threaded connection, snap-fit, or interference fit. The end of the connecting handle (7) away from the adjusting handle (6) is provided with a pipe joint (71), and the end of the pipe joint (71) is provided with an anti-detachment structure.

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