A triple-purpose gun head anti-back suction device for root canal irrigation

Abstract

The utility model discloses a three -way gun head anti -sucking back device for root canal irrigation relates to medical instrument technical field, and it aims at solving the technical problem of current device easy to appear elastic attenuation sealing failure, including anti -backflow pipe and the gun head of anti -backflow pipe upper installation and the anti -backflow component of anti -backflow pipe inside setting, anti -backflow pipe inside is provided with anti -backflow cavity, reducing chamber and fixed cavity along long -axis direction in proper order, is provided with fixed hole between reducing chamber and fixed cavity, the fixed hole inner wall is provided with sealing ring, the anti -backflow component includes the elastic diaphragm of array setting in anti -backflow cavity, and the elastic diaphragm includes installation part, sealing part and auxiliary resilience part along long -axis direction in proper order. The utility model has the advantages of through the sealing part accurate control shape of elastic diaphragm, auxiliary resilience part S type structure reduces fatigue and helps resilience, guarantees sealed anti -sucking back, and the gun head plug -in type installation and fixed plate arc -shaped guide, and the dismounting is convenient and stable, improves durability and universality, reduces the advantage of pollution risk.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a three-way nozzle anti-backflow device for root canal irrigation. Background Technology

[0002] Root canal irrigation is a core step in root canal treatment. Its main function is to remove infected tissue, necrotic pulp, and dentin debris from the root canal, while lubricating the canal walls and dissolving residual tissue. This creates a sterile environment for subsequent root canal filling and directly affects the success rate of treatment. Sodium hypochlorite solution is commonly used clinically, with a concentration of 1%-5%. It effectively kills bacteria and dissolves necrotic tissue, but it is irritating to living tissue and should be avoided from contacting the gingiva. Ethylenediaminetetraacetic acid (EDTA) is often used in conjunction with sodium hypochlorite to soften dentin and remove smears. The entire process must strictly adhere to aseptic principles, and the irrigation plan should be adjusted according to the root canal anatomy to ensure both irrigation effectiveness and treatment safety.

[0003] The operation of the three-way gun relies on the pressure difference between air and water inside the device: when the button is pressed to release high-pressure air / water, the fluid is sprayed out from the nozzle; when the button is released to stop spraying, the nozzle will experience a sudden drop in pressure, creating a "negative pressure," which, like a "straw" effect, may "suck" liquids in the mouth (such as the patient's blood, saliva, or exudate containing pathogens) back into the nozzle's internal channels, or even into the device's common air / water supply lines, thus causing contamination.

[0004] Currently, anti-backflow devices for three-way irrigation nozzles typically employ check valves to prevent backflow. These check valves are mainly spring-loaded or diaphragm-type. For spring-loaded check valves, the core relies on the spring force to achieve a one-way seal. However, after prolonged use, the spring is prone to weakening or malfunction due to corrosion from the irrigation fluid, leading to seal failure. While diaphragm-type check valves avoid the spring corrosion problem, they rely solely on the rebound of a single elastic diaphragm for sealing. The rebound force is small, making them susceptible to fatigue deformation and resulting in a loose seal. Therefore, we propose an anti-backflow device for three-way irrigation nozzles. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a three-way nozzle anti-backflow device for root canal irrigation, so as to solve the technical problem that the current device is prone to elasticity decay and sealing failure.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a three-way nozzle anti-backflow device for root canal irrigation, comprising an anti-backflow tube, a nozzle mounted on the anti-backflow tube, and an anti-backflow component disposed inside the anti-backflow tube. The anti-backflow tube has an anti-backflow cavity, a variable diameter cavity, and a fixed cavity arranged sequentially along its long axis. A fixing hole is provided between the variable diameter cavity and the fixed cavity. A sealing ring is provided on the inner wall of the fixing hole. The anti-backflow component includes an array of elastic diaphragms disposed within the anti-backflow cavity. The elastic diaphragms include an installation part, a sealing part, and an auxiliary rebound part arranged sequentially along their long axis.

[0007] Preferably, a fixing component is provided inside the anti-backflow pipe. The fixing component is located inside the fixing cavity. The fixing component includes springs arranged in an array on the inner wall of the fixing cavity, and a fixing plate is provided at the end of each spring.

[0008] Preferably, the gun head is inserted into the fixing hole from the end of the anti-backflow tube, the sealing ring covers the outer surface of the gun head mounting position, the fixing plate is fixed to the outer surface of the gun head by the elastic force of the spring, and the starting end of the fixing plate is bent outward into an arc shape.

[0009] Preferably, a connector is provided at the beginning of the anti-backflow pipe, and the connector is connected to the anti-backflow pipe.

[0010] Preferably, a limiting ring is provided inside the anti-backflow cavity, the mounting part is fitted and fixed to the front of the limiting ring, the sealing part is arranged in a fan shape, the cross-section of the sealing part is arranged in an arc shape, and the closing of several sealing parts seals the anti-backflow cavity.

[0011] Preferably, the auxiliary spring section is disposed at the end of the sealing section, the auxiliary spring section includes a plurality of curved sections, the curved sections are curved in an arc shape, adjacent curved sections form an S-shape, and the end of the auxiliary spring section contacts the inner wall of the variable diameter cavity.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model designs an elastic diaphragm structure. The sealing part of the elastic diaphragm adopts a fan-shaped arc-shaped cross-section design and has a fixed deformation direction. When gas and liquid flow, it can accurately generate pores and quickly reset after flushing stops. The S-shaped bending structure of the auxiliary rebound part of the elastic diaphragm has excellent elasticity. During deformation, several bending parts can distribute the force, reduce fatigue wear of a single part, further improve the overall durability of the device, reduce the frequency of clinical replacement and use costs. The auxiliary rebound part can provide additional rebound assistance when the sealing part resets. At the same time, its contact with the inner wall of the variable diameter cavity forms a supporting force, avoiding the problem of slow rebound and loose fit caused by fatigue deformation of the sealing part. It significantly reduces the risk of elasticity decay, ensures timely and thorough sealing of the anti-backflow cavity, effectively blocks the backflow of oral blood, saliva, pathogenic bacterial exudate, etc. caused by negative pressure, eliminates public pipeline contamination and cross-contamination, and solves the problem of elasticity decay and sealing failure that is common in current devices.

[0013] 2. This utility model also features a fixed plate structure. The nozzle is installed by inserting it from the end of the anti-backflow tube to the fixing hole. With the arc-shaped guide design at the beginning of the fixed plate, disassembly and assembly can be completed without complicated tools, which meets the efficient operation requirements of frequent nozzle replacement in clinical practice. The array of springs in the fixing component can provide uniform clamping force to ensure that the nozzle is installed firmly. At the same time, the elasticity of the springs can be compatible with different nozzle specifications, improving the versatility of the device. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 For the present utility model Figure 2 Enlarged structural diagram of the cross-section; Figure 4 This is a cross-sectional view of the anti-backflow pipe of this utility model; Figure 5 This is a schematic diagram of the fixing component structure of this utility model; Figure 6 This is a schematic diagram of the diaphragm assembly structure of this utility model; Figure 7 This is a schematic diagram of a single diaphragm structure of the present invention.

[0015] The following are the labels in the diagram: 101, anti-backflow tube; 1011, anti-backflow cavity; 1012, limiting ring; 1013, reducing cavity; 1014, fixing cavity; 1015, sealing ring; 102, nozzle; 103, connector; 200, anti-backflow assembly; 201, elastic diaphragm; 202, mounting part; 203, sealing part; 204, auxiliary rebound part; 2041, bending part; 300, fixing assembly; 301, spring; 302, fixing plate. Detailed Implementation

[0016] like Figures 1 to 7 As shown, this utility model relates to a three-way nozzle anti-backflow device for root canal irrigation, including an anti-backflow tube 101, a nozzle 102 mounted on the anti-backflow tube 101, and an anti-backflow assembly 200 disposed inside the anti-backflow tube 101. The anti-backflow tube 101 contains, along its long axis, an anti-backflow cavity 1011, a variable diameter cavity 1013, and a fixed cavity 1014. A fixing hole is provided between the variable diameter cavity 1013 and the fixed cavity 1014, and a sealing ring 1015 is disposed on the inner wall of the fixing hole. The anti-backflow assembly 200 includes an array of elastic diaphragms 201 disposed within the anti-backflow cavity 1011 (the elastic diaphragms 201 are made of EPDM rubber, which has high-frequency rebound, good fatigue resistance, and excellent waterproof performance). The elastic diaphragms 201, along their long axis, include, in sequence, an mounting part 202, a sealing part 203, and an auxiliary rebound part 204. This utility model designs a new elastic diaphragm 201 structure. The sealing part 203 of the elastic diaphragm 201 is precisely shaped, and the S-shaped structure of the auxiliary rebound part 204 reduces fatigue and assists rebound, ensuring sealing and preventing back suction. The gun head 102 is plug-in installed and the fixing plate 302 is arc-shaped guided, making it easy to install and remove and stable. It has the advantages of improving durability and versatility and reducing the risk of pollution.

[0017] Specifically, a fixing component 300 is provided inside the anti-backflow tube 101. The fixing component 300 is located within the fixing cavity 1014. The fixing component 300 includes springs 301 arranged in an array on the inner wall of the fixing cavity 1014, and a fixing plate 302 is provided at the end of each spring 301. Confining the fixing component 300 within the fixing cavity 1014 can prevent liquid from corroding the fixing component 300. The arrayed distribution of springs 301 can provide a uniform elastic force, ensuring that the clamping force of the fixing plate 302 on the gun head 102 is balanced, thus ensuring the stability of the gun head 102 installation.

[0018] Furthermore, the nozzle 102 is inserted into the fixing hole from the end of the anti-backflow tube 101. The sealing ring 1015 covers the outer surface of the nozzle 102 installation position. The fixing plate 302 is fixed to the outer surface of the nozzle 102 by the elastic force of the spring 301. The starting end of the fixing plate 302 is curved outward in an arc shape. The plug-in installation method facilitates the quick replacement and disassembly of the nozzle 102, meeting the needs of efficient dressing changes in clinical operations. The sealing ring 1015 covering the outer surface of the nozzle 102 can enhance the sealing performance between the fixing hole and the nozzle 102, preventing the irrigation fluid or backflow fluid from entering the fixing cavity 1014. The arc design at the starting end of the fixing plate 302 can guide the nozzle 102 when it is inserted, improving the ease of installation of the nozzle 102.

[0019] It is worth noting that a connector 103 is provided at the beginning of the anti-backflow tube 101, and the connector 103 is connected to the anti-backflow tube 101. The connector 103 is provided for connecting the anti-backflow tube 101 to the three-way gun, so as to provide a continuous fluid / gas source for the root canal irrigation process through the three-way gun. The structure of the connector 103 can also be adapted and adjusted according to the interface specifications of the three-way gun.

[0020] It is worth mentioning that a limiting ring 1012 is provided inside the anti-backflow cavity 1011. The mounting part 202 is fitted and fixed to the front of the limiting ring 1012. The sealing part 203 is arranged in a fan shape, and the cross-section of the sealing part 203 is arranged in an arc shape. When several sealing parts 203 close, the anti-backflow cavity 1011 is sealed. The limiting ring 1012 provides a stable fixed reference for the mounting part 202 of the elastic diaphragm 201, ensuring that the mounting part 202 does not shift during the operation of the device, and ensuring the overall stability of the elastic diaphragm 201. The fan-shaped structure of the sealing part 203 facilitates the combination and closure of multiple pieces, while the arc-shaped cross-section design fixes its elastic deformation direction. When gas and liquid flow, they will compress and deform the sealing part 203, creating pores between the sealing parts 203, thereby allowing gas and liquid to flow. When the gas and liquid pressure is lost or gas and liquid backflow occurs, the sealing part 203 can close quickly because its deformation direction is fixed. The closed sealing part 203 can effectively block the backflow of gas and liquid from entering the front channel of the anti-backflow cavity 1011.

[0021] It is worth noting that the auxiliary rebound section 204 is located at the end of the sealing section 203. The auxiliary rebound section 204 includes several curved sections 2041, which are curved in an arc shape. Adjacent curved sections 2041 form an S-shape. The end of the auxiliary rebound section 204 contacts the inner wall of the variable diameter cavity 1013. The connection design between the auxiliary rebound section 204 and the sealing section 203 can provide rebound assistance to the sealing section 203 after it is opened, avoiding the problem of slow or incomplete rebound caused by relying solely on the elasticity of the sealing section 203 itself. The S-shaped curved section 2041 has good elastic deformation capability. It can undergo adaptive deformation when the flushing fluid pushes the sealing section 203 to open, without hindering the flow of the flushing fluid. When flushing stops, the curved section 2041 can quickly return to its original shape, driving the sealing section 203 to close. The contact between the auxiliary rebound section 204 and the inner wall of the variable diameter cavity 1013 can further enhance the support force during rebound and improve the timeliness and tightness of the sealing section 203 closure.

[0022] Working Principle: This embodiment provides a three-way nozzle anti-backflow device for root canal irrigation. In use, firstly, the device is connected to the three-way nozzle body via the connector 103 at the beginning of the anti-backflow tube 101, ensuring a tight connection to guarantee the stability of subsequent fluid / gas transmission. Next, the nozzle tip 102 is inserted from the end of the anti-backflow tube 101 into the fixing hole between the fixed cavity 1014 and the variable diameter cavity 1013. At this time, the springs 301 arrayed on the inner wall of the fixed cavity 1014 will elastically deform upon insertion of the nozzle tip 102, thereby pushing the end... The fixing plate 302 fits tightly against the outer surface of the nozzle 102, relying on the elasticity of the spring 301 to clamp and fix the nozzle 102. Simultaneously, the sealing ring 1015 on the inner wall of the fixing hole covers the outer surface of the nozzle 102's installation position, enhancing the sealing performance between the nozzle 102 and the fixing hole, preventing irrigation fluid or backflow fluid from entering the fixing cavity 1014. The arc-shaped structure of the fixing plate 302, bent outwards at its initial end, acts as a guide during nozzle 102 insertion, ensuring the nozzle 102 is smoothly installed in place. When the three-way nozzle is started to begin root canal irrigation... At this time, high-pressure flushing fluid (such as sodium hypochlorite solution, EDTA solution, etc.) enters the anti-backflow tube 101 from the three-way gun body through connector 103, and then flows into the anti-backflow cavity 1011. At this time, the high-pressure flushing fluid will exert pressure on the sealing part 203 of the elastic diaphragm 201 arrayed in the anti-backflow cavity 1011. Since the sealing part 203 is fan-shaped and has an arc-shaped cross-section, under the action of flushing fluid pressure, the sealing part 203 of each elastic diaphragm 201 will undergo elastic deformation in a direction away from the center of the anti-backflow cavity 1011, so that the originally closed and sealed anti-backflow cavity 1011 is closed. A pore is created between the sealing parts 203 of 011, through which the rinsing fluid can enter the variable diameter cavity 1013, flow through the variable diameter cavity 1013 to the nozzle 102, and finally spray out from the nozzle 102 to realize the root canal rinsing operation. During this process, the auxiliary rebound part 204 of the elastic diaphragm 201 will undergo adaptive deformation due to the deformation of the sealing part 203. Its S-shaped curved part 2041 will be squeezed and deformed, and the end of the auxiliary rebound part 204 will remain in contact with the inner wall of the variable diameter cavity 1013, without obstructing the flow of the rinsing fluid.When root canal irrigation is complete and the button on the three-way gun is released to stop irrigation, the high pressure of the irrigation fluid disappears. At this time, the pressure inside the anti-return cavity 1011 drops sharply, and the sealing part 203 of the elastic diaphragm 201 begins to return to the center of the anti-return cavity 1011 under its own elastic restoring force. At the same time, the S-shaped bend 2041 of the auxiliary rebound part 204 quickly returns to its original shape, providing rebound assistance for the repositioning of the sealing part 203. Furthermore, the contact between the auxiliary rebound part 204 and the inner wall of the variable diameter cavity 1013 forms a supporting force, further accelerating the repositioning process of the sealing part 203. This causes all sealing parts 203 to close quickly, resealing the anti-return cavity 1011. This effectively prevents the backflow of blood, saliva, pathogenic exudate, and other liquids that may be present in the oral cavity due to the negative pressure inside the gun tip 102, avoiding these liquids from entering the front channel of the anti-return cavity 1011 and the internal tubing of the three-way gun body, thereby preventing cross-contamination and ensuring the aseptic and safety of the root canal irrigation process.

[0023] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A three-way nozzle anti-backflow device for root canal irrigation, characterized in that, The device includes an anti-backflow tube (101), a nozzle (102) mounted on the anti-backflow tube (101), and an anti-backflow assembly (200) disposed inside the anti-backflow tube (101). The anti-backflow tube (101) is provided with an anti-backflow cavity (1011), a variable diameter cavity (1013), and a fixed cavity (1014) in sequence along the long axis. A fixing hole is provided between the variable diameter cavity (1013) and the fixed cavity (1014). A sealing ring (1015) is provided on the inner wall of the fixing hole. The anti-backflow assembly (200) includes an array of elastic diaphragms (201) disposed in the anti-backflow cavity (1011). The elastic diaphragms (201) are provided with an installation part (202), a sealing part (203), and an auxiliary rebound part (204) in sequence along the long axis.

2. The anti-backflow device for a three-way nozzle tip used for root canal irrigation according to claim 1, characterized in that, A fixing component (300) is provided inside the anti-backflow pipe (101). The fixing component (300) is located inside the fixing cavity (1014). The fixing component (300) includes springs (301) arranged in an array on the inner wall of the fixing cavity (1014). A fixing plate (302) is provided at the end of the springs (301).

3. The anti-backflow device for a three-way nozzle tip used for root canal irrigation according to claim 2, characterized in that, The gun head (102) is inserted into the fixing hole from the end of the anti-backflow tube (101). The sealing ring (1015) covers the outer surface of the gun head (102) installation position. The fixing plate (302) is fixed to the outer surface of the gun head (102) by the elastic force of the spring (301). The starting end of the fixing plate (302) is bent outward in an arc shape.

4. The anti-backflow device for a three-way nozzle tip used for root canal irrigation according to claim 3, characterized in that, A connector (103) is provided at the beginning of the anti-backflow pipe (101), and the connector (103) is connected to the anti-backflow pipe (101).

5. A three-way nozzle anti-backflow device for root canal irrigation according to claim 4, characterized in that, The anti-return cavity (1011) is provided with a limiting ring (1012), the mounting part (202) is attached and fixed to the front of the limiting ring (1012), the sealing part (203) is arranged in a fan shape, the cross section of the sealing part (203) is arranged in an arc shape, and the sealing parts (203) are closed to seal the anti-return cavity (1011).

6. A three-way nozzle anti-backflow device for root canal irrigation according to claim 5, characterized in that, The auxiliary spring section (204) is disposed at the end of the sealing section (203). The auxiliary spring section (204) includes a plurality of curved sections (2041). The curved sections (2041) are curved in an arc shape. Adjacent curved sections (2041) form an S-shape. The end of the auxiliary spring section (204) contacts the inner wall of the variable diameter cavity (1013).

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