Breathing sampling device for lung function detection

Abstract

A respiration sampling device for lung function detection relates to the technical field of respiration medicine sampling and comprises a gas collecting tube body, a first cavity and a second cavity are formed in the gas collecting tube body along the two sides of the interior of the gas collecting tube body, the first cavity and the second cavity are communicated with each other, and a mounting part is arranged in the middle of the interior of the first cavity. A rotatable cylindrical mounting block is arranged at the saliva separation mechanism, corresponding water absorption cloth is arranged on the outer side face of the mounting block, and when the water absorption cloth makes contact with saliva and accordingly the absorption performance is reduced, the water absorption cloth can be separated from the saliva separation mechanism, so that the saliva can be separated from the saliva separation mechanism, and the saliva can be separated from the saliva separation mechanism. When saliva is filtered, the mounting block can be driven by the rotating rod to rotate, so that new water-absorbing cloth is exposed outside the mounting groove and is opposite to the flow guide mechanism, and therefore, airflow can be in contact with unused water-absorbing cloth during repeated sampling, the problem that saliva is not filtered thoroughly is effectively avoided, and the continuous and stable absorption performance of the water-absorbing cloth is ensured.

Description

Technical Field

[0001] This invention relates to the field of respiratory medicine sampling technology, and more specifically, to a respiratory sampling device for lung function testing. Background Technology

[0002] A breath sampling device is a medical instrument used to collect exhaled gas samples to assess lung function and diagnose related diseases. By detecting and analyzing exhaled gas samples, it can assess the physiological and pathological state of the human body. For example, it can detect components such as nitric oxide, volatile organic compounds, and ketones in exhaled gas, which can help diagnose diseases such as asthma, chronic obstructive pulmonary disease, and diabetes. It can also monitor airway inflammation, metabolic levels, and treatment response, and can be used for infectious disease screening, drug concentration monitoring, etc., providing key data support for early disease detection, efficacy evaluation, and health management.

[0003] Chinese Patent No. CN202510784946.X discloses a respiratory function respiratory sampling device, relating to the field of respiratory medicine sampling technology. It includes a gas collecting tube, one end of which is fixedly connected to a connecting nozzle, and the other end of which is provided with an air outlet. A breathing interface is snapped into the connecting nozzle. The device also includes a saliva separation mechanism, comprising a guide tube disposed inside the gas collecting tube. The guide tube has interconnected variable-diameter flow channels and reversing flow channels, with an absorbent cloth at the connection between the variable-diameter flow channels and the reversing flow channels. A first sealing unit is disposed inside the breathing interface. This application uses a saliva separation mechanism to prevent saliva from entering the gas collecting tube along with exhaled air, thereby ensuring the purity of the sample and significantly improving the accuracy of subsequent test results. Furthermore, the first and second sealing units seal the air inlet of the gas collecting tube before and after respiratory sampling, effectively preventing external gas from entering the gas collecting tube during the sampling process.

[0004] The above-mentioned method has the following drawbacks: According to the sampling guidelines for pulmonary function testing, unsuccessful single sampling is common in clinical testing, requiring 2-3 repeated samplings to obtain a valid sample. However, in this method, the absorbent cloth is in continuous contact with saliva in exhaled air, and its absorption performance gradually decreases with repeated use. This can lead to incomplete saliva filtration during subsequent sampling, causing some saliva to enter the gas collection tube with the gas, contaminating the sample and affecting the accuracy of the test results. In severe cases, it may mislead clinical judgment.

[0005] Therefore, given the aforementioned technical deficiencies, it is necessary to propose a respiratory sampling device for lung function testing. Summary of the Invention

[0006] The purpose of this invention is to provide a respiratory function respiratory sampling device for respiratory medicine, which addresses the problem that during respiratory sampling, repeated exhalation leads to prolonged contact of the absorbent cloth with saliva in the air, resulting in decreased absorption performance and subsequent incomplete saliva filtration.

[0007] This invention provides a respiratory sampling device for lung function testing, comprising a gas collecting tube body, characterized in that: the gas collecting tube body has a first chamber and a second chamber opened along its inner two sides, and the first chamber and the second chamber are interconnected; an installation part is provided in the middle of the first chamber, and a rotatable saliva separation mechanism is provided on the right side of the installation part; a flow guiding mechanism is movably arranged in the second chamber, and a bent drainage channel is formed between the flow guiding mechanism and the installation part. The saliva separation mechanism includes: a cylindrical mounting block and four slots equidistantly spaced along the outer surface of the mounting block, with absorbent cloth placed inside the slots. Rotating rods are located at both ends of the mounting block. An inner cavity is formed on the rear side of the gas collecting tube body, and one end of the rotating rod is rotatably connected to the inner cavity. A large gear and a connecting shaft are located at the end of the rotating rod entering the inner cavity. A small gear is rotatably mounted on the outer surface of the connecting shaft. Multiple slots are formed on the outer surface of the connecting shaft, with the left end of each slot being arc-shaped. A locking block that matches the slot is movably mounted on the inner end face of the small gear. A sliding mechanism is located within the inner cavity. The device includes a first slide bar and a second slide bar. The bottom of the first slide bar is provided with multiple first tooth blocks, which are meshed with the pinion. The second slide bar has a groove at one end facing the large gear, and a connecting bar is slidably disposed in the groove. A second spring is provided at one end of the connecting bar near the groove, and one end of the second spring is connected to the inner wall of the groove. An arc-shaped clamp is provided at the other end of the connecting bar, and the arc-shaped clamp is adapted to the right side of the large gear. Multiple second tooth blocks are provided at the opposite end of the arc-shaped clamp and the large gear, and the second tooth blocks are adapted to the outer side of the large gear. The left side of the gas collecting pipe body is also sealed and rotatably equipped with a gas collecting cylinder, and there are 4 independent receiving cavities inside the gas collecting cylinder. When in use, the treated gas can be transported to the receiving cavities for retention.

[0008] Preferably, a funnel-shaped drainage section is formed on the left side of the interior of the first chamber. The drainage section is integrally formed with the air collecting pipe body. A guide pipe is horizontally inserted and slidably arranged at the center of the drainage section. The left and right ends of the guide pipe are connected. An air passage is formed at the top and bottom of the mounting part along the interior of the first chamber. The air passage is connected to the drainage channel. An air blowing pipe is inserted through the center of the right side of the air collecting pipe body into the second chamber.

[0009] Preferably, at least two slots are provided on the right side of the air collecting pipe body in a horizontal direction, and one end of the slot is connected to the first chamber. A rod is slidably and adaptably provided between the slot and the right side of the air collecting pipe body, and the two ends of the rod are respectively opposite to the air guide pipe and the air blowing pipe. A support rod is provided at the end of the rod opposite to the air guide pipe, and a support plate is provided at the end of the rod opposite to the air blowing pipe. A support block is fixedly provided at the end of the rod near the slot along the outer wall, and a first spring is sleeved on the outer side of the rod at the end of the support block opposite to the air collecting pipe body.

[0010] Preferably, the left and right sides of the air collecting cylinder are horizontally provided with cylindrical rotating grooves at the center. A cylindrical rotating tube is adapted and slidably arranged in the rotating groove. One end of the rotating tube is sealed and rotatably connected to the inner wall of the air guide tube, while the other end extends to the left side of the air collecting cylinder. The receiving cavity is connected to the rotating groove.

[0011] Preferably, the rotating tube has an independent air inlet chamber and an exhaust chamber on its right and left sides, respectively. One end of the air inlet chamber is connected to the air guide pipe, and one end of the exhaust chamber is connected to the left side of the rotating tube. The left side of the exhaust chamber is provided with a sealing rubber mold. A rectangular air inlet is provided between the air inlet chamber and the outer wall of the rotating tube, and a rectangular exhaust outlet is provided between the exhaust chamber and the outer wall of the rotating tube. When the rotating tube is in its initial state, the air inlet is far away from the receiving cavity, and the exhaust outlet is far away from the outside of the air collecting cylinder. When the rotating tube moves, the air inlet is connected to the receiving cavity, and the exhaust outlet is connected to the outside of the air collecting cylinder and the receiving cavity.

[0012] Preferably, the left end of the air blowing tube has a closed structure, while the right end has an open structure. An opening is provided on the left side of the interior of the air blowing tube along the axial direction to the outer wall. When the air blowing tube is not moving, the opening can be away from the second chamber. When the air blowing tube is moving, the opening can enter the second chamber. The flow guiding mechanism is rectangular in shape, and a flow guiding cavity is connected from the right side to the left side of the flow guiding mechanism. The inner diameter of the flow guiding cavity gradually narrows from the outside to the inside, and one end of the air blowing pipe extends into the flow guiding cavity. A fixing block is provided at the opposite end of the air blowing pipe and the flow guiding cavity.

[0013] Preferably, the inner end face of the pinion is provided with at least one mounting hole, and the mounting hole and the slot are arranged opposite to each other. One end of the block is slidably connected to the mounting hole, and a spring piece is provided between the upper inner end of the mounting hole and the block. A support block is provided between the first slide bar and the second slide bar. An extension groove is provided horizontally between the inner cavity and the second chamber, and the extension groove is opposite to the first slide bar. An extension block is slidably disposed in the extension groove, and the two ends of the extension block are respectively connected to the first slide bar and the guide mechanism. The first slide bar is opposite to the pinion, and the second slide bar is opposite to the gear.

[0014] Preferably, the air inlet and the exhaust outlet are arranged in a straight line.

[0015] The beneficial effects of this invention are as follows: 1. This invention features a rotatable cylindrical mounting block at the saliva separation mechanism, with corresponding absorbent cloths on the outer surface of the mounting block. When the absorbent cloths experience a decrease in absorption performance due to contact with saliva, the mounting block can be rotated via a rotating rod, exposing new absorbent cloths to the outside of the mounting groove and positioning them opposite the flow guiding mechanism. This ensures that during repeated sampling, the airflow can always contact unused absorbent cloths, effectively avoiding the problem of incomplete saliva filtration and thus guaranteeing the continuous and stable absorption performance of the absorbent cloths.

[0016] 2. This invention features a connecting shaft, a large gear, a small gear, a slot, and a locking block at one end of the rotating rod. When the flow guiding mechanism moves to the left, it drives the first and second slide bars to move synchronously via the extension block. At this time, the first tooth block at the first slide bar drives the small gear to rotate, while the arc-shaped clamp always keeps the large gear pressed against it, thus preventing the connecting shaft and the rotating rod from rotating unexpectedly. When the flow guiding mechanism drives the first and second slide bars to reset to the right, the slot at the connecting shaft abuts against the locking block at the small gear. This allows the rotational power of the small gear to be transmitted to the connecting shaft, which then further drives the rotating rod, the large gear, and the mounting block to rotate synchronously, thus achieving automatic flipping of the absorbent cloth.

[0017] 3. This invention, by incorporating a rotating groove, a rotating tube, and four independent receiving cavities within the gas collecting cylinder, allows the rotating tube to align the air inlet with the corresponding receiving cavity during sampling. Once aligned, the target gas can be stored individually in its respective cavity. This design enables multiple repeated gas sampling, effectively improving sampling efficiency and ensuring sample reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a respiratory sampling device for lung function testing according to the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of a respiratory sampling device for lung function testing according to the present invention.

[0020] Figure 3 This is a schematic cross-sectional view of the gas collecting cylinder of the present invention.

[0021] Figure 4 This is a schematic diagram of the installation of the saliva separation mechanism and the flow guiding mechanism of the present invention.

[0022] Figure 5 This is a schematic diagram of the slide bar and gear mounting structure of the present invention.

[0023] Figure 6 This is a schematic diagram of the internal structure of the second slider of the present invention.

[0024] Figure 7 This is a perspective view of the mounting structure of the connecting shaft and pinion of the present invention.

[0025] Figures 1-7 middle: 1-Gas collecting tube body; 11-First chamber; 12-Installation part; 13-Installation groove; 14-Air passage; 15-Drainage part; 16-Second chamber; 17-Blowing tube; 18-Rubber membrane; 19-Opening; 2-Saliva separation mechanism; 21-Mounting block; 22-Slot; 23-Absorbent cloth; 24-Rotating rod; 25-Large gear; 26-Connecting shaft; 27-Small gear; 28-Mounting hole; 281-Spring; 282-Clamping block; 29-Clamping groove; 3-Flow guiding mechanism; 31-Flow guiding cavity; 32-Fixing block; 33-Drainage channel; 4-Support plate; 41-Slot; 42-Insertion rod; 43-Support block; 44-First spring; 45-Support rod; 46-Air duct; 5-Inner cavity; 51-First slide bar; 511-First toothed block; 52-Second slide bar; 53-Support block; 54-Slide groove; 55-Connecting bar; 56-Second spring; 57-Arc-shaped clamp; 571-Second toothed block; 58-Extension groove; 59-Extension block; 6-Gas collection cylinder; 61-Rotating groove; 62-Rotating pipe; 63-Inlet chamber; 64-Inlet; 65-Exhaust chamber; 66-Exhaust port; 67-Receiving chamber. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] As attached Figure 1 To be continued Figure 7As shown: A respiratory sampling device for lung function testing includes a gas collecting tube body 1. The gas collecting tube body 1 has a first chamber 11 and a second chamber 16 formed along its left and right sides, respectively. The first chamber 11 is connected to the left side of the gas collecting tube body 1. A mounting part 12 is provided along the middle of the right side of the first chamber 11. A mounting groove 13 is formed on the right side of the mounting part 12, and a saliva separation mechanism 2 for gas processing is provided in the mounting groove 13. A funnel-shaped drainage part 15 is formed on the left side of the first chamber 11. This drainage part 15 is integrally formed with the gas collecting tube body 1, and a guide pipe 46 is horizontally inserted and slidably arranged at the center of the drainage part 15. The left and right ends are connected. The top and bottom of the mounting part 12 form an airway 14 along the inside of the first chamber 11. The flow guiding mechanism 3 is movably disposed in the second chamber 16 and is opposite to the saliva separation mechanism 2. The first chamber 11 and the second chamber 16 are connected. A blowing pipe 17 is provided through the center of the right side of the air collecting tube body 1 and the inside of the second chamber 16. The left end of the blowing pipe 17 is closed and the right end is open. An opening 19 is provided on the left side of the inside of the blowing pipe 17 along the axial direction to the outer wall. When the blowing pipe 17 is not moved, the opening 19 can move away from the second chamber 16. When the blowing pipe 17 is moved, the opening 19 can enter the second chamber 16.

[0032] In the above structure, when the user pushes the air tube 17 to move, the opening 19 can enter the second chamber 16. Then, the user exhales the gas through the air tube 17 and introduces it into the flow guiding mechanism 3 through the opening 19 for flow guiding. After flow guiding, the airflow can be blown towards the saliva separation mechanism 2 for saliva absorption. The processed gas enters the air guide tube 46 through the air passage 14 and is blown out.

[0033] like Figure 2 and Figure 4 As shown, the saliva separation mechanism 2 consists of a mounting block 21, a slot 22, and an absorbent cloth 23. The mounting block 21 is cylindrical and is fitted and rotatably mounted on the inner wall of the mounting slot 13. The slot 22 includes four slots, which are equidistantly spaced along the outer periphery of the mounting block 21. The absorbent cloth 23 is disposed within the slot 22. Rotating rods 24 are provided at the center of the front and rear sides of the mounting block 21, and the rotating rods 24 are rotatably connected to the inner wall of the slot 22. During use, the gas is guided by the flow guiding mechanism 3 and accelerated towards the absorbent cloth 23. In this way, the absorbent cloth 23 can effectively absorb and separate saliva in the airflow. When the absorbent cloth 23 is used continuously, its absorption performance will gradually decrease. Therefore, the user can rotate the mounting block 21 to expose a new absorbent cloth 23 to the outside of the mounting slot 13 for stable water absorption.

[0034] The flow guiding mechanism 3 is rectangular in shape, and a flow guiding cavity 31 is connected from the right side to the left side of the flow guiding mechanism 3. The inner diameter of the flow guiding cavity 31 gradually narrows from the outside to the inside. One end of the air blowing tube 17 extends into the flow guiding cavity 31, and a fixing block 32 is provided at the opposite end of the air blowing tube 17 and the flow guiding cavity 31. Meanwhile, the saliva separation mechanism 2 is spaced apart from the flow guiding mechanism 3, and a bent drainage channel 33 is formed between the right side of the mounting part 12 and the left side of the flow guiding mechanism 3. The drainage channel 33 is connected to the airway 14. During use, when the gas is blown out of the air tube 17, it can smoothly enter the guide cavity 31. The guide cavity 31, through a specific change in its inner diameter, can effectively increase the gas flow rate, thereby accelerating the contact efficiency between the airflow and the absorbent cloth 23. Secondly, thanks to the bent design of the drainage channel 33, the airflow must first contact the absorbent cloth 23 during its movement before turning back into the drainage channel 33. This design can effectively ensure that the airflow and the absorbent cloth 23 make full contact. Finally, the airflow smoothly enters the airway 14 through the drainage channel 33. In addition, when the air tube 17 moves, it can also push the guide mechanism 3 and the saliva separation mechanism 2 closer together. After they come together, the width of the drainage channel 33 can be reduced. Through this spatial adjustment, the airflow can make fuller contact with the absorbent cloth 23, further ensuring the absorption performance of the absorbent cloth 23.

[0035] Furthermore, to facilitate the repositioning of the displaced air blowing pipe 17 and air guide pipe 46, at least two slots 41 are provided horizontally on the right side of the air collecting pipe body 1. One end of each slot 41 is connected to the first chamber 11. A rod 42 is slidably and adaptably installed between the slot 41 and the right side of the air collecting pipe body 1. The two ends of the rod 42 are respectively opposite to the air guide pipe 46 and the air blowing pipe 17. A support rod 45 is provided at the end of the rod 42 opposite to the air guide pipe 46. A support plate 4 is provided at the end of the rod 42 opposite to the air blowing pipe 17. A support block 43 is fixedly installed along the outer wall of the end of the rod 42 near the slot 41. A first spring 44 is sleeved on the outer side of the rod 42 at the end of the support block 43 opposite to the air collecting pipe body 1. In actual use, the user can push the air tube 17 to move. After the air tube 17 moves, its opening 19 can connect with the second chamber 16. In the connected state, the user can blow exhaled air into the gas collection tube through the air tube 17. When the user stops exhaling or finishes exhaling, the pressure on the air tube 17 is released. At this time, the first spring 44 will force the air tube 17 and the air guide tube 46 to move to the right. After the movement, the opening 19 of the air tube 17 can be moved away from the second chamber 16, which can effectively block the gas flow path in the gas collection tube, thereby avoiding gas leakage.

[0036] like Figures 4 to 7As shown, to ensure the absorption performance of the absorbent cloth 23, an inner cavity 5 is provided at intervals along the back of the first chamber 11 and the second chamber 16 along the inside of the air collecting tube body 1. One end of the rotating rod 24 extends into the inner cavity 5. A connecting shaft 26 is fixedly installed at the end of the rotating rod 24 facing the inner cavity 5. A large gear 25 is fixedly installed along the outer side of the end of the rotating rod 24 facing the inner cavity 5. A small gear 27 is rotatably installed along the outer side of the end of the connecting shaft 26 facing the inner cavity 5. Multiple slots 29 are equidistantly provided on the outer side of the connecting shaft 26 in the circumferential direction. The left end of the slot 29 is arc-shaped. At least one slot is provided on the inner end face of the small gear 27. A mounting hole 28 is provided, which is opposite to the slot 29. A locking block 282 is slidably disposed between the mounting hole 28 and the slot 29, and the lower end of the locking block 282 is mutually adapted to the slot 29. A spring piece 281 is disposed between the upper end of the mounting hole 28 and the locking block 282. When the pinion 27 rotates to the left, the arc-shaped end face of the slot 29 can push the locking block 282 to slide upward along the mounting hole 28, at which time the pinion 27 can rotate independently. When the pinion 27 rotates to the right, the straight surface of the slot 29 will directly abut the locking block 282, thereby restricting its upward movement. The core function of this design is that when the pinion 27 rotates to the left, it can rotate independently around the connecting shaft 26. When the pinion 27 rotates to the right, it will drive the connecting shaft 26 to rotate synchronously through the engagement of the locking block 282 and the locking slot 29. Therefore, when the connecting shaft 26 is rotated under force, it can further drive the rotating rod 24 and the mounting block 21 to rotate 90°, ultimately realizing the replacement of the absorbent cloth 23 and ensuring that the new absorbent cloth 23 always maintains stable absorption performance.

[0037] like Figures 4 to 6 As shown, to facilitate the rotation of the pinion 27, a first slide bar 51 and a second slide bar 52 are slidably arranged in the inner cavity 5 along the horizontal direction. A support block 53 is provided between the first slide bar 51 and the second slide bar 52. An extension groove 58 is provided in the horizontal direction between the inner cavity 5 and the second chamber 16. The extension groove 58 is arranged opposite to the first slide bar 51, and an extension block 59 is slidably arranged in the extension groove 58. The two ends of the extension block 59 are connected to the first slide bar 51 and the flow guiding mechanism 3, respectively. This design allows the flow guiding mechanism 3 to drive the first slide bar 51 and the second slide bar 52 to move left and right through the extension block 59 when the air blowing pipe 17 is subjected to force.

[0038] The first slide bar 51 is opposite to the pinion 27, and a plurality of first tooth blocks 511 are provided on the bottom left side of the first slide bar 51. The first tooth blocks 511 are meshed with the top of the pinion 27. The second slide bar 52 is opposite to the large gear 25, and a groove 54 is provided at the end of the second slide bar 52 facing the large gear 25. A connecting bar 55 is slidably provided in the groove 54 to the outer end of the second slide bar 52. A second spring 56 is provided at the end of the connecting bar 55 near the groove 54, and one end of the second spring 56 is connected to the inner wall of the groove 54. An arc-shaped clamp 57 is provided at the end of the connecting bar 55 away from the groove 54. The arc-shaped clamp 57 is adapted to the right side of the large gear 25. A plurality of second tooth blocks 571 are provided at the opposite end of the arc-shaped clamp 57 and the large gear 25. The second tooth blocks 571 are adapted to the outer side of the large gear 25.

[0039] In practical use, when the guide mechanism 3 drives the first slide bar 51 and the second slide bar 52 to move to the left, the first slide bar 51 and the arc-shaped clamp 57 can contact the corresponding small gear 27 and large gear 25 respectively. When the second tooth block 571 of the arc-shaped clamp 57 gradually approaches the large gear 25, it can press against the large gear 25 and the rotating rod 24. Subsequently, when the first tooth block 511 at the first slide bar 51 contacts the small gear 27, it will drive the small gear 27 to rotate to the left. During the rotation, part of the friction of the small gear 27 will act on the connecting shaft 26. At this time, the large gear 25, the rotating rod 24 and the connecting shaft 26 have been pressed and fixed by the arc-shaped clamp 57. With the help of this pressing force, the friction transmitted by the small gear 27 can be effectively overcome, so that the small gear 27 can only rotate around the connecting shaft 26, thus it cannot drive other components to move together. When the guide mechanism 3 drives the first slide bar 51 and the second slide bar 52 to reset to the right, the slot 29 at the connecting shaft 26 will abut against the locking block 282 at the pinion 27. In this abutting state, the rotational power of the pinion 27 can be transmitted to the connecting shaft 26, which then drives the rotating rod 24 and the large gear 25 to rotate synchronously. During the rotation of the large gear 25, its rotational power will overcome the resistance applied by the second spring 56. This force prevents the arc-shaped clamp 57 from continuing to jam the large gear 25 and the rotating rod 24, thus ensuring that the rotating rod 24 and the mounting block 21 can rotate normally, ultimately achieving the purpose of replacing the absorbent cloth 23. Meanwhile, the design of the second spring 56 and the connecting bar 55 can be adapted to the movement process of the first slide bar 51: that is, when the first tooth block 511 gradually pushes the pinion 27 to rotate, the elastic force of the second spring 56 can be used to stably press the arc-shaped clamp 57 against the outside of the large gear 25, so that the large gear 25 can be continuously subjected to the limiting and locking effect, thereby avoiding the situation where the pinion 27 will drive the connecting shaft 26 to rotate together when it rotates.

[0040] like Figures 1-3 As shown, in order to sample the gas, a gas collecting cylinder 6 is sealed and rotatably installed on the left side of the gas collecting pipe body 1. A cylindrical rotating groove 61 is horizontally opened on the left and right sides of the gas collecting cylinder 6 along the center. A cylindrical rotating tube 62 is adapted and slidably installed in the rotating groove 61. One end of the rotating tube 62 is sealed and rotatably connected to the inner wall of the air guide pipe 46, while the other end extends to the left side of the gas collecting cylinder 6. This design allows the rotating tube 62 to move together when the blowing pipe 17 pushes the flow guiding mechanism 3 and the air guide pipe 46 to move.

[0041] The rotating groove 61 has four accommodating cavities 67 spaced apart along its outer periphery, and all four accommodating cavities 67 are interconnected with the rotating groove 61. The rotating tube 62 has an independent air inlet cavity 63 and an exhaust cavity 65 on its right and left sides, respectively. One end of the air inlet cavity 63 is connected to the air guide pipe 46, and one end of the exhaust cavity 65 is connected to the left side of the rotating tube 62. The left side of the exhaust cavity 65 is provided with a sealing rubber mold. A rectangular air inlet 64 is provided between the air inlet cavity 63 and the outer wall of the rotating tube 62, and a rectangular exhaust outlet 66 is provided between the exhaust cavity 65 and the outer wall of the rotating tube 62. When the rotating tube 62 is in its initial state, the air inlet 64 is away from the accommodating cavity 67, and the exhaust outlet 66 is away from the outside of the air collecting cylinder 6. When the rotating tube 62 moves, the air inlet 64 can communicate with the accommodating cavity 67, and the exhaust outlet 66 can communicate with the outside of the air collecting cylinder 6 and the accommodating cavity 67.

[0042] In practical use, when a user needs to sample the gas, the blowing tube 17, the air guide mechanism, the air guide tube 46 and the rotating tube 62 need to be pushed to move synchronously to the left. After they are in place, the air inlet 64 can be precisely aligned with the receiving cavity 67, and the exhaust port 66 can be connected to the outside of the gas collecting cylinder 6. When the gas in the air guide tube 46 enters the rotating tube 62, it will be delivered to the receiving cavity 67 through the aligned air inlet 64. This design can not only keep the target gas stably in the corresponding receiving cavity 67, but also allow excess gas to be discharged to the outside through the exhaust port 66. This design can effectively prevent the user from having difficulty exhaling. Once gas collection is complete, simply release the pressure on the air inlet tube 17. The flow guide mechanism 3, air inlet tube 46, and rotating tube 62 will automatically reset, blocking all airflow channels. This completes the entire gas collection process. Finally, during gas detection, a respiratory gas sample can be directly obtained from the containment chamber 67 by inserting an external connector through the rubber membrane 18 on the device, facilitating subsequent testing.

[0043] Furthermore, to ensure the accuracy of gas sampling, the inlet 64 and the outlet 66 are aligned in a straight line. The core function of this arrangement is to ensure that when the rotating tube 62 is adjusted, the inlet 64 and the outlet 66 are synchronously aligned with the corresponding receiving cavity 67. Through this synchronous alignment mechanism, each gas sample collected can be stored in an independent receiving cavity 67.

[0044] Furthermore, to prevent external dust from entering the air blowing tube 17, a corresponding rubber membrane is also provided at the inlet end of the air blowing tube 17. When the device is not in use, the rubber membrane 18 can tightly cover the inlet of the air blowing tube 17, forming an effective barrier to effectively isolate external dust. When an exhalation operation is required, simply pass the rubber membrane 18 through to smoothly start the exhalation process. This does not affect the ease of use and can always ensure the cleanliness of the inside of the air blowing tube 17.

[0045] Working principle: When taking gas samples, the rubber membrane 18 of the blowing tube 17 must first be inserted, and then the blowing tube 17 is pressed to move to the left. During the movement, the blowing tube 17 will simultaneously drive the flow guiding mechanism 3, the air guide tube 46 and the rotating tube 62 to move together, ensuring that all components are in place in coordination. After the air blowing tube 17 has moved, the user blows air into the second chamber 16 through the air blowing tube 17. After the airflow enters, it is guided by the guide chamber 31 and blows directly towards the mounting block 21 and into contact with the absorbent cloth 23. At this time, the absorbent cloth 23 will quickly absorb the saliva in the airflow. After the saliva in the airflow is removed, it will enter the airway 14 through the drainage channel 33, and then flow into the air intake chamber 63 of the air guide tube 46 and the rotating tube 62 in sequence. Subsequently, the airflow will gradually enter the receiving chamber 67 through the air inlet 64 and remain stably, while the excess gas will be discharged to the outside through the exhaust port 66, thereby maintaining the airflow balance and preventing the user from being obstructed when exhaling. Simultaneously, when the flow guiding mechanism 3 moves to the left, it drives the first slide bar 51 and the second slide bar 52 to move synchronously through the extension block 59. At this time, the first tooth block 511 at the first slide bar 51 will contact the small gear 27, and the arc-shaped clamp 57 at the second slide bar 52 will abut against the large gear 25. As the first slide bar 51 continues to move to the left, the first tooth block 511 will drive the small gear 27 to rotate, while the arc-shaped clamp 57 will always keep the large gear 25 pressed against, thereby preventing the connecting shaft 26 and the rotating rod 24 from rotating unexpectedly. When the flow guiding mechanism 3 drives the first slide bar 51 and the second slide bar 52 to reset to the right, the slot 29 at the connecting shaft 26 will abut against the locking block 282 at the small gear 27. In the abutting state, the rotational power of the small gear 27 can be transmitted to the connecting shaft 26. Subsequently, the connecting shaft 26 further drives the rotating rod 24, the large gear 25 and the mounting block 21 to rotate synchronously, realizing the rotational flipping of the mounting block 21. After flipping, the new absorbent cloth 23 will be opposite the guide cavity 31, thereby realizing the automatic replacement of the absorbent cloth 23 and ensuring that the new absorbent cloth 23 always maintains stable saliva absorption performance.

[0046] The above are merely preferred embodiments of the present invention and are 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, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A respiratory sampling device for lung function testing, comprising a collecting tube body (1), characterized in that: The gas collecting tube body (1) has a first chamber (11) and a second chamber (16) on both sides inside, and the first chamber (11) and the second chamber (16) are connected to each other. The first chamber (11) has an installation part (12) in the middle inside, and a rotatable saliva separation mechanism (2) is provided on the right side of the installation part (12). The second chamber (16) has a flow guiding mechanism (3) that is movably arranged inside, and a bent drainage channel (33) is formed between the flow guiding mechanism (3) and the installation part (12). The saliva separation mechanism (2) includes: a cylindrical mounting block (21) and four slots (22) equidistantly opened along the outer side of the mounting block (21), and an absorbent cloth (23) is provided in the slots (22). Rotating rods (24) are provided at the front and rear ends of the mounting block (21). An inner cavity (5) is opened on the rear side of the gas collecting tube body (1), and one end of the rotating rod (24) is rotatably connected to the inner cavity (5). A large gear (25) and a connecting shaft (26) are provided at the end of the rotating rod (24) that enters the inner cavity (5). A small gear (27) is rotatably provided on the outer side of the connecting shaft (26). Multiple slots (29) are opened on the outer side of the connecting shaft (26), and the left end of the slot (29) is arc-shaped. A locking block (282) that is compatible with the slot (29) is movably provided on the inner end face of the small gear (27). A first... The slide bar (51) and the second slide bar (52) are provided. The bottom of the first slide bar (51) is provided with a plurality of first tooth blocks (511), and the first tooth blocks (511) are meshed with the small gear (27). The second slide bar (52) has a groove (54) at one end facing the large gear (25), and a connecting bar (55) is slidably provided in the groove (54). A second spring (56) is provided at one end of the connecting bar (55) near the groove (54), and one end of the second spring (56) is connected to the inner wall of the groove (54). An arc-shaped clamp (57) is provided at the other end of the connecting bar (55), and the arc-shaped clamp (57) is adapted to the right side of the large gear (25). A plurality of second tooth blocks (571) are provided at the opposite end of the arc-shaped clamp (57) and the large gear (25), and the second tooth blocks (571) are adapted to the outer side of the large gear (25). The left side of the gas collecting pipe body (1) is also sealed and rotatably equipped with a gas collecting cylinder (6), and there are 4 independent receiving cavities (67) in the gas collecting cylinder (6). When in use, the treated gas can be transported to the receiving cavity (67) for retention.

2. The respiratory sampling device for lung function testing according to claim 1, characterized in that: The first chamber (11) has a funnel-shaped drainage section (15) formed on the left side. The drainage section (15) is integrally formed with the gas collecting pipe body (1). A guide pipe (46) is horizontally slidably arranged at the center of the drainage section (15). The left and right ends of the guide pipe (46) are connected. An air passage (14) is formed at the top and bottom of the mounting part (12) along the first chamber (11). The air passage (14) is connected to the drainage channel (33). An air blowing pipe (17) is arranged through the center of the right side of the gas collecting pipe body (1) and the second chamber (16).

3. A respiratory sampling device for lung function testing according to claim 2, characterized in that: At least two slots (41) are provided on the right side of the gas collecting pipe body (1) in the horizontal direction, and one end of the slot (41) is connected to the first chamber (11). A plug rod (42) is slidably and adapted to the right side of the gas collecting pipe body (1) in the slot (41), and the two ends of the plug rod (42) are respectively opposite to the air guide pipe (46) and the air blowing pipe (17). A support rod (45) is provided at the opposite end of the plug rod (42) and the air guide pipe (46). A support plate (4) is provided at the opposite end of the plug rod (42) and the air blowing pipe (17). A support block (43) is fixedly provided at the end of the plug rod (42) near the slot (41) along the outer wall. A first spring (44) is sleeved on the opposite end of the support block (43) and the outer side of the plug rod (42).

4. A respiratory sampling device for lung function testing according to claim 2, characterized in that: The air collecting cylinder (6) has a cylindrical rotating groove (61) horizontally opened at the center on both sides. A cylindrical rotating tube (62) is fitted and slidably arranged in the rotating groove (61). One end of the rotating tube (62) is sealed and rotatably connected to the inner wall of the air guide pipe (46), while the other end extends to the left side of the air collecting cylinder (6). The receiving cavity (67) is connected to the rotating groove (61).

5. A respiratory sampling device for lung function testing according to claim 4, characterized in that: The rotating tube (62) has an independent air inlet chamber (63) and an exhaust chamber (65) on its right and left sides, respectively. One end of the air inlet chamber (63) is connected to the air guide pipe (46), and one end of the exhaust chamber (65) is connected to the left side of the rotating tube (62). The left side of the exhaust chamber (65) is provided with a sealing rubber mold. A rectangular air inlet (64) is provided between the air inlet chamber (63) and the outer wall of the rotating tube (62). A rectangular exhaust port (66) is provided between the exhaust chamber (65) and the outer wall of the rotating pipe (62). When the rotating pipe (62) is in the initial state, the air inlet (64) can be far away from the receiving chamber (67), and the exhaust port (66) can be far away from the outside of the air collecting cylinder (6). When the rotating pipe (62) moves, the air inlet (64) can be connected to the receiving chamber (67), and the exhaust port (66) can be connected to the outside of the air collecting cylinder (6) and the receiving chamber (67).

6. A respiratory sampling device for lung function testing according to claim 3, characterized in that: The left end of the air blowing pipe (17) is closed, while the right end is open. An opening (19) is provided on the left side of the interior of the air blowing pipe (17) along the axial direction to the outer wall. When the air blowing pipe (17) is not moved, the opening (19) can move away from the second chamber (16). When the air blowing pipe (17) moves, the opening (19) can enter the second chamber (16). The flow guiding mechanism (3) is rectangular in shape, and a flow guiding cavity (31) is provided on the right side to the left side of the flow guiding mechanism (3). The inner diameter of the flow guiding cavity (31) gradually narrows from the outside to the inside, and one end of the air blowing pipe (17) extends into the flow guiding cavity (31). A fixing block (32) is provided at the opposite end of the air blowing pipe (17) and the flow guiding cavity (31).

7. A respiratory sampling device for lung function testing according to claim 1, characterized in that: The inner end face of the pinion (27) is provided with at least one mounting hole (28), and the mounting hole (28) and the slot (29) are arranged opposite to each other. One end of the card block (282) is slidably connected to the mounting hole (28), and a spring piece (281) is provided between the upper inner end of the mounting hole (28) and the card block (282). A support block (53) is provided between the first slide bar (51) and the second slide bar (52). An extension groove (58) is provided between the inner cavity (5) and the second chamber (16) in the horizontal direction. The extension groove (58) is arranged opposite to the first slide bar (51). An extension block (59) is slidably arranged in the extension groove (58). The two ends of the extension block (59) are connected to the first slide bar (51) and the guide mechanism (3) respectively. The first slide bar (51) is opposite to the small gear (27), and the second slide bar (52) is opposite to the large gear (25).

8. A respiratory sampling device for lung function testing according to claim 3, characterized in that: The air inlet (64) and the exhaust outlet (66) are arranged in the same straight line.

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