Anti-backflow structure of mouthpiece for lung function test

Abstract

The utility model relates to lung function detection structure technical field discloses lung function detection mouth and nose anti -backflow structure, including detector, the front end fixedly connected with the conveying pipe of detector, the other end fixedly connected with the limiting block of conveying pipe, the outside slide coupling of conveying pipe has the sliding sleeve, the inside fixedly connected with extruding block of sliding sleeve, the one end of conveying pipe is away from the spring no.

Description

Technical Field

[0001] This utility model relates to the field of lung function testing structure technology, and in particular to a lung function testing nozzle anti-backflow structure. Background Technology

[0002] The anti-backflow design of the mouthpiece in pulmonary function testing is designed to ensure the accuracy and safety of the test. It prevents the backflow of exhaled air and saliva, avoiding cross-infection and ensuring the safety of both the test subject and the instrument. It also guarantees unidirectional gas flow during testing, resulting in accurate measurement data. This provides doctors with a reliable basis for diagnosing lung diseases and assessing lung function, which is of great significance for disease diagnosis and treatment.

[0003] The anti-backflow structure of a pulmonary function testing nozzle typically includes the nozzle body, a one-way valve, and connecting tubing. The one-way valve is the core component; common types include duckbill valves and flap valves. It ensures unidirectional gas flow. During use, the nozzle is first connected to the testing equipment tubing. The patient then firmly holds the nozzle in their mouth and breathes normally or performs specific inhalation and exhalation maneuvers as required by the testing procedure to ensure accurate results.

[0004] In existing technologies, some lung function testing structures waste testing time and reduce testing efficiency due to waiting for replacement. Secondly, they are not conducive to continuous testing and affect the smoothness of the testing process. Furthermore, they increase the risk of cross-infection, as different patients use the same mouthpiece if it is not replaced in time, which is detrimental to medical safety. Therefore, a lung function testing mouthpiece anti-backflow structure is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a backflow prevention structure for the mouthpiece of lung function testing, which aims to improve the problem of difficulty in quickly replacing the mouthpiece in the prior art, which would result in wasted time and the risk of cross-infection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A lung function testing nozzle anti-backflow structure includes a detector, a delivery tube fixedly connected to the front end of the detector, a limit block fixedly connected to the other end of the delivery tube, a sliding sleeve slidably connected to the outside of the delivery tube, a squeezing block fixedly connected inside the sliding sleeve, a spring sleeved on the end of the delivery tube away from the detector, multiple locking balls movably connected to the end of the delivery tube away from the detector, an air nozzle slidably connected inside the delivery tube, an engagement groove opened on the outside of the air nozzle, a squeezing pad fixedly connected to the end of the air nozzle near the detector, a sealing gasket fixedly connected inside the delivery tube, an anti-backflow component fixedly connected inside the delivery tube, and a wire harness assembly fixedly connected to the front end of the detector. As a further description of the above technical solution: The anti-backflow assembly includes a one-way valve, which is externally fixedly connected to the inside of the delivery pipe. A limit groove is provided at the end of the one-way valve away from the air nozzle, and a closing cap is rotatably connected to the end of the one-way valve away from the air nozzle. As a further description of the above technical solution: The wire harness assembly includes a positioning plate, the rear end of which is fixedly connected to the front end of the detector. A clamping piece is fixedly connected to the front end of the positioning plate, and a lifting plate is fixedly connected to the other end of the clamping piece. The top of the lifting plate has multiple friction grooves and two positioning grooves. As a further description of the above technical solution: The positioning plate has two limiting plates that slide inside. Each of the two limiting plates has a locking plate fixedly connected to its far end. Each of the two limiting plates has a damper fixedly connected to its near end. The damper is fitted with a spring. The locking plate is engaged with the inside of the positioning groove. As a further description of the above technical solution: The bottom of the positioning plate is fixedly connected to multiple friction columns, the outside of which is slidably connected to the inside of the friction groove, and the front end of the detector is fixedly connected to a placement block. As a further description of the above technical solution: The side of the limiting block near the detector contacts the side of the squeezing block near the air nozzle, and the side of the squeezing pad near the detector contacts the side of the sealing pad near the air nozzle. As a further description of the above technical solution: One end of the spring is fixedly connected to one side of the conveying pipe, and the other end of the spring is fixedly connected to one end of the extrusion block. As a further description of the above technical solution: The outer surfaces of the plurality of locking balls engage with the interior of the locking grooves, and the interior of the pressing block contacts the outer surfaces of the plurality of locking balls respectively.

[0007] This utility model has the following beneficial effects: 1. In this utility model, the sliding sleeve is moved by pulling it. When the sliding sleeve moves, it can drive the squeezing block to squeeze the spring, thereby causing the spring to deform. At this time, the ball has space to move up and down. Then, by removing the air nozzle, the detection efficiency can be significantly improved, the patient waiting time can be reduced, the detection volume per unit time can be increased, the hygiene and safety of the detection can be guaranteed, cross-infection can be prevented, patients can feel more at ease, and it is also convenient for medical staff to operate, optimize the workflow, and improve the overall quality of medical services.

[0008] 2. In this utility model, the conveying pipe is placed inside the clamping plate. Then, by pushing the lifting plate and pressing the clamping plate, the clamping plate can push the limiting plate to move during the movement of the plate. This makes the circuit of the detection equipment neat and orderly, avoids the circuit from being tangled and messy, and prevents the circuit from being worn or pulled, thus extending its service life and reducing the risk of equipment failure. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of the anti-backflow structure of the lung function testing nozzle proposed in this utility model. Figure 2 This is a schematic diagram of the extrusion block of the lung function testing nozzle anti-backflow structure proposed in this utility model; Figure 3 This is a schematic diagram of the structure of the anti-backflow structure for the pulmonary function testing nozzle proposed in this utility model. Figure 4 This is a schematic diagram of the one-way valve of the lung function testing nozzle anti-backflow structure proposed in this utility model. Figure 5 This is a schematic diagram of the limiting plate of the lung function testing nozzle anti-backflow structure proposed in this utility model.

[0010] Legend: 1. Detector; 2. Delivery pipe; 3. Limiting block; 4. Sliding sleeve; 5. Extrusion block; 6. Spring 1; 7. Ball clamp; 8. Air nozzle; 9. Engaging groove; 10. Extrusion pad; 11. Sealing gasket; 12. One-way valve; 13. Limiting groove; 14. Closing cover; 15. Positioning plate; 16. Clamping piece; 17. Lifting plate; 18. Friction groove; 19. Positioning groove; 20. Limiting plate; 21. Clamping plate; 22. Damper; 23. Spring 2; 24. Placement block; 25. Friction column. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Reference Figures 2 to 4This utility model provides an embodiment of a pulmonary function testing nozzle anti-backflow structure, including a detector 1, which can detect lung conditions. A delivery tube 2 is fixedly connected to the front end of the detector 1, allowing the patient to receive oxygen through the delivery tube 2. A limiting block 3 is fixedly connected to the other end of the delivery tube 2, restricting its position. A sliding sleeve 4 is slidably connected to the outside of the delivery tube 2, allowing it to move manually. A compression block 5 is fixedly connected inside the sliding sleeve 4, controlling its movement as it moves. During the process, the extrusion block 5 can be moved. The side of the limiting block 3 near the detector 1 is in contact with the side of the extrusion block 5 near the air nozzle 8. The limiting block 3 can prevent the extrusion block 5 from moving. A spring 6 is sleeved on the end of the conveying pipe 2 away from the detector 1. The spring 6 can generate rebound potential energy. One end of the spring 6 is fixedly connected to one side of the conveying pipe 2. The conveying pipe 2 can provide a support point for the spring 6. The other end of the spring 6 is fixedly connected to one end of the extrusion block 5. The extrusion block 5 can squeeze the spring 6 to deform, thereby generating potential energy.

[0013] Multiple retaining balls 7 are movably connected to the end of the delivery tube 2 away from the detector 1. These retaining balls 7 can move up and down outside the delivery tube 2. The interior of the squeezing block 5 contacts the exterior of each retaining ball 7, restricting their movement. An air nozzle 8 is slidably connected inside the delivery tube 2. The patient shell transmits gas to the detector 1 through the air nozzle 8. The exterior of the air nozzle 8 has a locking groove 9, which serves a positioning function. The exterior of the multiple retaining balls 7 engages with the interior of the locking groove 9, allowing the retaining balls 7 to be placed within the locking groove 9. The device can fix the air nozzle 8. A compression pad 10 is fixedly connected to the end of the air nozzle 8 near the detector 1. When the air nozzle 8 moves, it can drive the compression pad 10 to move. A sealing pad 11 is fixedly connected inside the delivery pipe 2. The side of the compression pad 10 near the detector 1 contacts the side of the sealing pad 11 near the air nozzle 8. The compression pad 10 can contact the sealing pad 11 during the movement and squeeze the sealing pad 11 to achieve a sealing effect, preventing gas leakage inside the delivery pipe 2, which would cause inaccurate measurement.

[0014] An anti-backflow component is fixedly connected inside the delivery pipe 2. The anti-backflow component includes a one-way valve 12, which serves as a device to prevent liquid backflow. The one-way valve 12 is externally fixedly connected inside the delivery pipe 2. A limiting groove 13 is provided at the end of the one-way valve 12 away from the air nozzle 8. A closing cover 14 is rotatably connected at the end of the one-way valve 12 away from the air nozzle 8. The movement position of the closing cover 14 can be controlled by the limiting groove 13. The closing cover 14 can be opened by blowing air for detection. When air is inhaled, the closing cover 14 can be driven by a strong vacuum force to achieve the closing effect and prevent saliva backflow from causing cross-infection.

[0015] Reference Figure 1 and Figure 5 A wire harness assembly is fixedly connected to the front end of detector 1. The wire harness assembly includes a positioning plate 15, the rear end of which is fixedly connected to the front end of detector 1. The positioning plate 15 serves as an installation base. A clamping piece 16, made of rubber, is fixedly connected to the front end of positioning plate 15 to position the delivery tube 2. A lifting plate 17 is fixedly connected to the other end of clamping piece 16. Moving lifting plate 17 allows clamping piece 16 to deform, thereby achieving the effect of clamping the wire. Multiple friction grooves 18 are provided on the top of lifting plate 17. The friction grooves 18 can limit the increase of resistance. Two positioning... The groove 19, the positioning groove 19 can serve as a limiting point. The positioning plate 15 has two limiting plates 20 slidably connected inside. The limiting plates 20 can move inside the positioning plate 15. The far ends of the two limiting plates 20 are fixedly connected to the clamping plates 21. By squeezing the clamping plates 21, the limiting plates 20 can be moved. The near ends of the two limiting plates 20 are fixedly connected to the dampers 22. The dampers 22 are fitted with springs 23. When the limiting plates 20 move, they can squeeze the dampers 22 and springs 23 to deform, thereby generating potential energy. At the same time, the limiting plates 20 are designed to prevent the clamping plates 21 from falling off.

[0016] The outer part of the card plate 21 is engaged inside the positioning groove 19. The card plate 21 can be placed inside the positioning groove 19 so that the positioning plate 15 can be attached to the lifting plate 17, thus fixing the wire harness. The bottom of the positioning plate 15 is fixedly connected with multiple friction columns 25. The outer part of the friction columns 25 is slidably connected inside the friction groove 18. The friction columns 25 are inside the friction groove 18, thereby increasing the friction between the two and achieving the positioning effect. The front end of the detector 1 is fixedly connected with a placement block 24, which can support the air nozzle 8 and can be placed inside the device after use.

[0017] Working principle: When it is necessary to replace the air nozzle 8, the sliding sleeve 4 is moved by pulling it. When the sliding sleeve 4 moves, it can drive the pressing block 5 to press the spring 6, thereby causing the spring 6 to deform. At this time, the locking ball 7 has the space to move up and down. Then, by pulling out the air nozzle 8, the locking ball 7 can be pushed upward through the locking groove 9 opened in the air nozzle 8, thereby achieving the function of replacing the air nozzle 8.

[0018] When the air nozzle 8 needs to be installed, first, the sliding sleeve 4 is moved by pulling it. At this time, the sliding sleeve 4 can compress the spring 6 and deform it, thus generating potential energy. Then, the air nozzle 8 is guided into the delivery tube 2. One end of the air nozzle 8 can push multiple retaining balls 7 upward. When the air nozzle 8 moves to a certain position, the retaining balls 7 can fall smoothly into the retaining groove 9. Then, the sliding sleeve 4 is released. Due to the potential energy of the spring 6, the squeezing block 5 can be moved, so that the squeezing block 5 is outside the multiple retaining balls 7, preventing the retaining balls 7 from moving. This makes the multiple retaining balls 7 engage inside the retaining groove 9, thus fixing the air nozzle 8. After the air nozzle 8 is placed into the delivery tube 2, the squeezing pad 10 fixed at one end of the air nozzle 8 can contact the sealing pad 11 to increase the sealing. In this way, the air nozzle 8 can be replaced quickly, which can speed up the effect for medical personnel and prevent patient infection.

[0019] When lung function needs to be tested, the closed cover 14 is opened by blowing air, and the closed cover 14 is closed by a strong vacuum force when inhaling, thus preventing saliva backflow and cross-infection.

[0020] When the conveyor tube 2 needs to be bundled, firstly, the conveyor tube 2 is placed inside the clamp 16. Then, by pushing the lifting plate 17 and pressing the clamping plate 21, the clamping plate 21 can push the limiting plate 20 to move during its movement. This causes the limiting plate 20 to compress the damper 22 and the second spring 23, causing them to deform and generate potential energy. Next, the friction column 25 can be used to correct the inside of the friction groove 18. Then, the clamping plate 21 is placed inside the positioning groove 19. At the same time, the friction column 25 can engage with the friction groove 18. By releasing the clamping plate 21, the damper 22 and the second spring 23 can push the limiting plate 20, so that the clamping plate 21 can be engaged inside the positioning groove 19, thereby achieving the effect of positioning the conveyor tube 2. At the same time, the air nozzle 8 is engaged inside the placement block 24 to prevent the wire harness from rubbing against each other, thereby extending the life of the equipment.

[0021] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pulmonary function testing mouthpiece anti-backflow structure, including a detector (1), characterized in that: The detector (1) is fixedly connected to a conveying pipe (2) at its front end. A limit block (3) is fixedly connected to the other end of the conveying pipe (2). A sliding sleeve (4) is slidably connected to the outside of the conveying pipe (2). A squeezing block (5) is fixedly connected inside the sliding sleeve (4). A spring (6) is sleeved on the end of the conveying pipe (2) away from the detector (1). Multiple locking balls (7) are movably connected to the end of the conveying pipe (2) away from the detector (1). An air nozzle (8) is slidably connected inside the conveying pipe (2). A locking groove (9) is opened on the outside of the air nozzle (8). A squeezing pad (10) is fixedly connected to the end of the air nozzle (8) near the detector (1). A sealing gasket (11) is fixedly connected inside the conveying pipe (2). An anti-backflow component is fixedly connected inside the conveying pipe (2). A wire harness component is fixedly connected to the front end of the detector (1).

2. The anti-backflow structure for the pulmonary function testing nozzle according to claim 1, characterized in that: The anti-backflow assembly includes a one-way valve (12), which is externally fixedly connected to the inside of the delivery pipe (2). A limit groove (13) is provided at one end of the one-way valve (12) away from the air nozzle (8), and a closing cover (14) is rotatably connected at the other end of the one-way valve (12) away from the air nozzle (8).

3. The anti-backflow structure for the pulmonary function testing nozzle according to claim 1, characterized in that: The wire harness assembly includes a positioning plate (15), the rear end of which is fixedly connected to the front end of the detector (1), a clamping piece (16) is fixedly connected to the front end of the positioning plate (15), and a lifting plate (17) is fixedly connected to the other end of the clamping piece (16). The top of the lifting plate (17) has multiple friction grooves (18) and two positioning grooves (19).

4. The anti-backflow structure for the pulmonary function testing nozzle according to claim 3, characterized in that: The positioning plate (15) has two sliding connection plates (20) inside. Each of the two limiting plates (20) has a fixed plate (21) at the far end. The two limiting plates (20) have a fixed damper (22) at the near end. The damper (22) is fitted with a spring (23) on the outside. The outside of the clamping plate (21) is engaged inside the positioning groove (19).

5. The anti-backflow structure for the pulmonary function testing nozzle according to claim 4, characterized in that: The bottom of the positioning plate (15) is fixedly connected to a plurality of friction columns (25), the outside of the friction columns (25) is slidably connected to the inside of the friction groove (18), and the front end of the detector (1) is fixedly connected to a placement block (24).

6. The anti-backflow structure for the pulmonary function testing nozzle according to claim 1, characterized in that: The side of the limiting block (3) near the detector (1) is in contact with the side of the squeezing block (5) near the air nozzle (8), and the side of the squeezing pad (10) near the detector (1) is in contact with the side of the sealing pad (11) near the air nozzle (8).

7. The anti-backflow structure for the pulmonary function testing nozzle according to claim 1, characterized in that: One end of the spring (6) is fixedly connected to one side of the conveying pipe (2), and the other end of the spring (6) is fixedly connected to one end of the extrusion block (5).

8. The anti-backflow structure for the pulmonary function testing nozzle according to claim 1, characterized in that: The exterior of the plurality of the locking balls (7) engages with the interior of the locking groove (9), and the interior of the pressing block (5) is in contact with the exterior of the plurality of the locking balls (7).

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