A nasal oxygen tube airflow resistance testing device

Abstract

This application discloses a nasal cannula airflow resistance testing device, belonging to the field of nasal cannula technology. It includes a main body of the testing instrument, which has a rectangular structure and a test connector at its top. The test connector is used to engage with one side of the test tube. A fixed workbench is fixed to one side of the main body of the testing instrument, and adjustable workbenches are evenly spaced on the outer side of the fixed workbench. A movable adjusting body is located at the top of the adjusting workbench, used for bending and changing the test tube. In this nasal cannula airflow resistance testing device, the operator only needs to press and move the adjusting body during the entire process. With the automatic positioning of the positioning component, the moved adjusting body is fixed in position, thereby reducing the operator's steps and making it more practical.

Description

Technical Field

[0001] This application relates to the technical field of nasal oxygen tube airflow resistance testing, and in particular to a nasal oxygen tube airflow resistance testing device. Background Art

[0002] A nasal cannula is a tubing device used to deliver oxygen into a patient's nasal cavity. It is typically made of soft plastic or silicone to ensure comfort and safety. The nasal cannula delivers oxygen through the nasal cavity, improving the patient's hypoxia and increasing blood oxygen saturation. Furthermore, in patients with respiratory diseases or cardiopulmonary insufficiency, nasal cannulas can serve as an adjunct therapy tool to help maintain normal respiratory function. Therefore, nasal cannulas play a significant role in the medical field. Currently, after the production of nasal cannulas, an airflow resistance testing device is used to test the airflow resistance. This testing ensures that the nasal cannula provides a stable and adequate oxygen flow rate. Excessive resistance can lead to insufficient oxygen supply, affecting the patient's treatment outcome. Therefore, the airflow resistance testing device is an essential component in the production process of nasal cannulas.

[0003] Existing testing devices on the market typically connect one side of the nasal oxygen tube to one side of the testing unit during nasal oxygen tube testing. A certain flow rate of gas is supplied to the nasal oxygen tube through the internal gas source of the testing device. A high-precision pressure sensor measures the pressure difference between the two ends of the nasal oxygen tube, and the airflow resistance is calculated based on relevant principles of fluid mechanics. Specifically, after adjusting the test pressure and rated flow rate, the pressure change before and after the nasal oxygen tube insertion (ΔP = P2 - P1) is recorded, which represents the airflow resistance. A specific testing method is disclosed in application number 201922335273.2, "A Nasal Oxygen Tube Testing Device."

[0004] Existing testing devices on the market connect the testing instrument to an external adjustment mechanism to detect the airflow resistance of nasal oxygen tubes at different degrees of bend. However, the adjustment mechanism requires different methods to adjust for different degrees of bend, making the adjustment operation very cumbersome for operators. Furthermore, although nasal oxygen tubes are sampled for testing, the number is still very large, resulting in operators performing multiple operations frequently during extended testing periods, leading to a significant workload. For example, multiple adjustment methods are disclosed in application number 202211062048.6, a nasal oxygen tube airflow resistance testing device. Summary of the Invention

[0005] The purpose of this invention is to provide a nasal cannula airflow resistance testing device to solve the problems mentioned in the background art. Current market testing devices connect the testing instrument to an external adjustment mechanism to test the airflow resistance of nasal canns at different bends. However, the adjustment mechanism requires different methods to adjust for different bends, making the adjustment process very cumbersome for operators. Furthermore, although nasal canns are tested by sampling, the number is still very large, resulting in operators performing numerous operations frequently during extended testing periods, leading to a significant workload.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a nasal oxygen tube airflow resistance testing device, comprising a testing instrument body, which is rectangular in shape, and a testing connector is provided at its top. The testing connector is used to engage with one side of the testing tube. A fixed workbench is fixed to one side of the testing instrument body, and an adjusting workbench is provided at equal intervals on the outer side of the fixed workbench. A movable adjusting body is provided at the top of the adjusting workbench for bending and changing the testing tube. A movable moving body is provided at the top of the fixed workbench, and a conveying mechanism is provided at the bottom of the movable body and connected to a positioning component. When the movable body moves to the top, the position of the positioning component is determined by the conveying mechanism, thereby fixing the position of the adjusting body after movement by the positioning component.

[0007] Preferably, the adjustment workbench includes side plates, a top plate, a bottom plate, and a reserved slot. There are four side plates, one side of which is connected to the bottom of the top plate and the other side is connected to the top of the bottom plate. The top of the top plate is provided with a through reserved slot, and a movable adjustment body is provided inside the reserved slot. The middle of the four side plates is set as a hollow structure.

[0008] Preferably, the adjusting body includes an adjusting roller, a connecting slider, a connecting gear, a connecting block, and a return spring. The bottom bearing of the adjusting roller is connected to the connecting slider, and the connecting slider slides inside the reserved groove. The bottom of the connecting slider is coaxially connected to the connecting gear, and the bottom bearing of the connecting gear is connected to the connecting block. The bottom of the connecting block is provided with a return spring connected to the base plate.

[0009] Preferably, a positioning component is provided on the outer side of the connecting gear for positioning, and the positioning component includes a limiting component and a pushing component. The limiting component is provided on one side of the connecting gear, and a pushing component for controlling its movement is also provided on the outer side of the limiting component, and the pushing component is connected to one side of the conveying mechanism.

[0010] Preferably, the moving body includes a central rod, a reserved slot, a connecting vertical rod, and a connecting rack. The central rod has a reserved slot in the middle for engaging with the top end of the test pipe. Connecting vertical rods are integrally installed on the bottom of both sides of the central rod, and connecting racks are vertically installed on the bottom of the connecting vertical rods. A conveying mechanism is provided at the top of the connecting rack. The connecting vertical rods slide in a groove at the top of the fixed workbench. A rotating component is also provided on the outside of the central rod, and the rotating component engages with the engaging seat. A slider is integrally installed on the bottom of the connecting rack, and two sets of compression springs are symmetrically arranged on both sides of the slider and connected to the rectangular groove at the bottom of the fixed workbench.

[0011] Preferably, the limiting component includes a limiting rack, a compression spring, and a fixing plate. The limiting rack is disposed on one side of the connecting gear, and the fixing plate is integrally installed on the bottom of both sides of the limiting rack. The compression spring is disposed on the outer side of the limiting rack and connected to the inner wall of the side plate. The top of the limiting rack is provided with a moving block that slides in the moving groove at the bottom of the top plate.

[0012] Preferably, the pushing component includes a rotating shaft and a rotating cam. The rotating cam is coaxially connected to the top two sides of the rotating shaft, and the position of the rotating cam corresponds to the position of the fixed plate. The outer side of the rotating shaft is connected to the conveying mechanism.

[0013] Preferably, the transmission mechanism includes a driven pulley, a connecting belt, a driving gear, and a driving pulley. The driving gear is disposed at the top of the connecting rack, and the driving pulley is coaxially connected to the top of the driving gear. A connecting belt is disposed on the outer side of the driving pulley and connected to the driven pulley.

[0014] Preferably, the driven pulley is coaxially connected to the outer side of the rotating shaft, and the driven pulleys on the outer side of the rotating shaft inside adjacent adjustment worktables are connected by a connecting belt.

[0015] Preferably, the rotating assembly includes a protruding rod and a rotating rod. The protruding rod is integrally installed on the outside of the intermediate rod, and the outside of the protruding rod is connected to the rotating rod via a pivot. The rotating rod engages with a groove inside the locking seat, and the outside of the locking seat is fixed to the outer wall of the fixed worktable.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the nasal oxygen cannula airflow resistance testing device;

[0017] Equipped with a positioning component located on the outside of the adjustment body, the test pipe passes through the inside of the adjustment body in sequence. The operator only needs to press and move the different adjustment bodies according to the bending requirements to move them to different positions. When the position of each adjustment component changes, it also causes the test pipe to change angle. At this time, the airflow resistance inside the pipe can be tested under different bending angles through the test instrument body. Throughout the process, the operator only needs to press and move the adjustment body. With the automatic positioning work of the positioning component, the position of the adjusted body after movement will be fixed, thereby reducing the number of operation steps for the operator and making it more practical.

[0018] The system is equipped with a movable main body, which assists in the connection and connection between the test pipe and the test connector. When the movable main body moves to its top, it engages with the locking seat, thus determining the position of the movable main body. The movement of the movable main body triggers the transmission mechanism, which in turn positions the adjustment body with the positioning component. When the rotating component is separated from the locking seat, the movable main body automatically resets, preventing the positioning component from limiting the adjustment body. The adjustment body then automatically returns to its initial position, allowing for further adjustment and testing without manual reset. This greatly simplifies operation, reduces the workload of staff, and makes it more suitable for batch testing production lines. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 A schematic diagram of the structure of the equally spaced adjustment worktable of the present invention;

[0021] Figure 3 This is a top view of the internal structure of the adjustable workbench of the present invention;

[0022] Figure 4 This is a schematic diagram of the internal structure of the adjustable workbench of the present invention, viewed from below.

[0023] Figure 5 This is a magnified view of the adjustable worktable structure of the present invention from below;

[0024] Figure 6 This is a partially enlarged structural diagram of the positioning component of the present invention;

[0025] Figure 7 This is a schematic diagram of the main structure of the mobile body of the present invention;

[0026] Figure 8This is a schematic diagram of the moving main body structure from below in this invention;

[0027] Figure 9 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0028] Figure 10 For the present invention Figure 8 Enlarged structural diagram at point B.

[0029] In the diagram: 1. Tester body; 2. Test connector; 3. Fixed worktable; 4. Adjustable worktable; 41. Side plate; 42. Top plate; 43. Base plate; 44. Reserved slot; 5. Adjustment body; 51. Adjustment roller; 52. Connecting slider; 53. Connecting gear; 54. Connecting block; 55. Return spring; 6. Test pipe; 7. Moving body; 71. Intermediate rod; 72. Reserved slot; 73. Connecting vertical rod; 74. Connecting rack; 8. Limiting assembly; 81. Limiting rack; 82. Compression spring; 83. Fixed plate; 9. Pushing assembly; 91. Rotating shaft; 92. Rotating cam; 10. Conveying mechanism; 101. Driven pulley; 102. Connecting belt; 103. Driving gear; 104. Driving pulley; 11. Rotating assembly; 111. Protruding rod; 112. Rotating rod; 12. Locking seat; 13. Slider; 14. Compression spring. Detailed Implementation

[0030] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] One preferred embodiment of this application, such as Figures 1 to 10As shown, a nasal oxygen tube airflow resistance testing device includes a testing instrument body 1, which is rectangular in shape and has a testing connector 2 at its top. The testing connector 2 is used to engage with one side of the testing tube 6. A fixed workbench 3 is fixed to one side of the testing instrument body 1, and an adjusting workbench 4 is evenly spaced on the outer side of the fixed workbench 3. A movable adjusting body 5 is set at the top of the adjusting workbench 4 for bending and changing the testing tube 6. A movable moving body 7 is set at the top of the fixed workbench 3, and a conveying mechanism 10 is set at the bottom of the moving body 7 and connected to a positioning component. When the moving body 7 moves to the top, the position of the positioning component is determined by the conveying mechanism 10, so that the position of the adjusting body 5 after movement is fixed by the positioning component.

[0034] This application provides a nasal oxygen tube airflow resistance testing device with a positioning component. Specifically, in use, firstly, the entire testing instrument body 1, fixed worktable 3, and adjusting worktable 4 are set in appropriate positions. Then, it is connected to an external power supply. Next, the nasal oxygen tube to be tested is picked up, and one side of its outer surface engages with the top of the moving body 7. Then, the nasal oxygen tube and the moving body 7 are moved together, so that the top of the nasal oxygen tube engages with the test connector 2. At the same time, as the moving body 7 moves, it controls the positioning component to move through the conveying mechanism 10 to perform limit work. Then, the testing can be carried out. First, the device is started to determine whether the airflow resistance inside the straight nasal oxygen tube is qualified. After passing the test, the next step, angle change testing, is conducted. During this process, the operator simply presses the adjusting body 5 at different positions as needed. Pressing then moves the adjusting body 5 above the adjusting worktable 4, causing the test pipe 6 to move and bend. The entire testing instrument body 1 is then restarted to complete the test. After the test, the test pipe 6 is separated from the moving body 7. The top of the test connector 2 is then pulled out. The moving body 7 automatically resets, preventing the positioning component from limiting the adjusting body 5. The adjusting body 5 returns to its initial position, allowing the operator to install and test another test pipe 6.

[0035] Among them, according to Figure 1 , Figure 2 and Figure 5As shown, the adjustment workbench 4 includes side plates 41, top plate 42, bottom plate 43 and reserved slots 44. There are four side plates 41. One side of the four side plates 41 is connected to the bottom of the top plate 42, and the other side is connected to the top of the bottom plate 43. The top of the top plate 42 is provided with a through reserved slot 44, and a movable adjustment body 5 is provided inside the reserved slot 44. The middle of the four side plates 41 is set as a hollow structure.

[0036] Specifically, when the main body 5 moves, it moves inside the reserved slot 44, and the entire positioning component is set in the hollow structure between the two side plates 41, which makes the overall appearance of the device more aesthetically pleasing.

[0037] Furthermore, in specific operations, the adjustment subject 5, according to... Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the adjusting body 5 includes an adjusting roller 51, a connecting slider 52, a connecting gear 53, a connecting block 54, and a return spring 55. The bottom bearing of the adjusting roller 51 is connected to the connecting slider 52, and the connecting slider 52 slides inside the reserved groove 44. The bottom of the connecting slider 52 is coaxially connected to the connecting gear 53, and the bottom bearing of the connecting gear 53 is connected to the connecting block 54. The bottom of the connecting block 54 is provided with a return spring 55 connected to the base plate 43.

[0038] When the operator presses the main body 5, the adjusting roller 51 descends. As it descends, it causes the connecting slider 52, connecting gear 53, and connecting block 54 at the bottom to descend together under the action of the return spring 55. When the connecting gear 53 descends, it separates from the positioning component. At this time, the positioning component will not limit the connecting gear 53, so the adjusting roller 51 can be easily pushed, allowing the connecting slider 52 at the bottom to move to any position inside the reserved groove 44. After moving to the appropriate position, the pressure on the adjusting roller 51 is released, and it is controlled to move upward. At this time, the connecting gear 53 will move upward and engage with the positioning component to limit the movement of the adjusting body 5.

[0039] Furthermore, when setting limits, according to Figure 6 and Figure 7 As shown, a positioning component is provided on the outside of the connecting gear 53 for positioning. The positioning component includes a limiting component 8 and a pushing component 9. The limiting component 8 is provided on one side of the connecting gear 53. A pushing component 9 for controlling its movement is also provided on the outside of the limiting component 8. The pushing component 9 is connected to one side of the conveying mechanism 10.

[0040] The limiting assembly 8 includes a limiting rack 81, a compression spring 82, and a fixing plate 83. The limiting rack 81 is located on one side of the connecting gear 53, and the fixing plate 83 is integrally installed on the bottom of both sides of the limiting rack 81. The compression spring 82 is located on the outer side of the limiting rack 81 and is connected to the inner wall of the side plate 41. The top of the limiting rack 81 is provided with a moving block that slides in the moving groove at the bottom of the top plate 42.

[0041] The push assembly 9 includes a rotating shaft 91 and a rotating cam 92. The rotating cam 92 is coaxially connected to the top ends of both sides of the rotating shaft 91, and the position of the rotating cam 92 corresponds to the position of the fixed plate 83. The outer side of the rotating shaft 91 is connected to the conveying mechanism 10.

[0042] When the positioning component is in a limiting position, the rotating cam 92 on the rotating shaft 91 is in a horizontal state and is pressing the limiting rack 81. Therefore, at this time, the tooth block on the limiting rack 81 is engaged with the tooth block on the connecting gear 53. Thus, the limiting work is completed when they are engaged.

[0043] Subsequently, when the moving body 7 is reset, the transmission mechanism 10 will cause the rotating shaft 91 on the pushing component 9 to rotate in the opposite direction, driving the rotating cam 92 to rotate to a vertical state. Therefore, the fixing plate 83 at the bottom of the limiting rack 81 will not be limited by the rotating cam 92. At this time, the limiting rack 81 will be separated from the connecting gear 53 under the action of the reset pulling force of the compression spring 82. Since the connecting gear 53 is not subjected to any force in any direction, it will return to its initial position under the action of the reset spring 55, without the need for manual reset.

[0044] As a further preferred embodiment, according to Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the moving body 7 includes a middle rod 71, a reserved slot 72, a connecting vertical rod 73, and a connecting rack 74. The middle rod 71 has a reserved slot 72 in the middle position for engaging with the top end of the test pipe 6. The connecting vertical rods 73 are integrally installed on the bottom of both sides of the middle rod 71, and the connecting rack 74 is vertically installed on the bottom of the connecting vertical rods 73. The top of the connecting rack 74 is provided with a conveying mechanism 10. The connecting vertical rods 73 slide in the groove at the top of the fixed workbench 3. A rotating component 11 is also provided on the outside of the middle rod 71, and the rotating component 11 engages with the engaging seat 12. The bottom of the connecting rack 74 is integrally installed with a slider 13, and two sets of compression springs 14 are symmetrically arranged on both sides of the slider 13 and connected to the rectangular groove at the bottom of the fixed workbench 3.

[0045] The transmission mechanism 10 includes a driven pulley 101, a connecting belt 102, a drive gear 103, and a drive pulley 104. The drive gear 103 is located at the top of the connecting rack 74. The drive pulley 104 is coaxially connected to the top of the drive gear 103. The connecting belt 102 is located on the outer side of the drive pulley 104 and is connected to the driven pulley 101.

[0046] Driven pulley 101 is coaxially connected to the outer side of rotating shaft 91, and driven pulleys 101 on the outer side of rotating shaft 91 inside adjacent adjustment worktables 4 are connected by a connecting belt 102.

[0047] The rotating assembly 11 includes a protruding rod 111 and a rotating rod 112. The protruding rod 111 is integrally installed on the outside of the intermediate rod 71, and the outside of the protruding rod 111 is connected to the rotating rod 112 through a rotating shaft. The rotating rod 112 engages with the groove inside the locking seat 12, and the outside of the locking seat 12 is fixed to the outer wall of the fixed worktable 3.

[0048] When the moving body 7 moves, the test pipe 6 is engaged with the reserved slot 72 on the intermediate rod 71. Therefore, when the test pipe 6 moves, the intermediate rod 71 drives the connecting vertical rod 73 at its bottom to move. When the connecting vertical rod 73 moves, it drives the connecting rack 74 at its bottom to drive the slider 13 to slide inside the rectangular groove. When the connecting rack 74 moves, it meshes with the drive gear 103, which in turn drives the drive pulley 104 coaxially connected to it to rotate. With the setting of the connecting belt 102, the driven pulley 101 inside the adjustment worktable 4 adjacent to the fixed worktable 3 will rotate. Under the action of the connecting belt 102, the driven pulleys 101 inside each adjustment worktable 4 will rotate.

[0049] When the driven pulley 101 rotates, it drives the rotating shaft 91 to rotate, and the rotating shaft 91 causes the rotating cam 92 to rotate.

[0050] In order to fix the position of the intermediate rod 71 after it has been moved, the operator needs to rotate the rotating rod 112 at the top of the protruding rod 111 so that it engages with the inside of the engaging seat 12, thus fixing the position of the intermediate rod 71. This ensures that the test pipe 6 will not come loose, and the positioning component can also perform positioning work. After the test pipe 6 is completed, the rotating rod 112 and the engaging seat 12 can be separated. At this time, the slider 13 will be reset under the action of the compression spring 14, which will drive the intermediate rod 71 to reset. This will cause the positioning component to not limit the adjustment body 5, thus completing the automatic reset of the adjustment body 5.

[0051] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A nasal cannula airflow resistance testing device, characterized in that, The instrument includes a main body (1) which is rectangular in shape and has a test connector (2) at its top. The test connector (2) is used to engage with one side of the test pipe (6). The instrument is characterized in that a fixed workbench (3) is fixed on one side of the main body (1), and an adjustment workbench (4) is provided at equal intervals on the outside of the fixed workbench (3). A movable adjustment body (5) is provided at the top of the adjustment workbench (4) for bending and changing the test pipe (6). A movable moving body (7) is provided at the top of the fixed workbench (3), and a conveying mechanism (10) is provided at the bottom of the moving body (7) to connect with the positioning component. When the moving body (7) moves to the top, the position of the positioning component is determined by the conveying mechanism (10), so that the position of the adjustment body (5) after moving is fixed by the positioning component. The adjustment workbench (4) includes a side plate (41), a top plate (42), a bottom plate (43), and a reserved slot (44). There are four side plates (41). One side of the four side plates (41) is connected to the bottom of the top plate (42), and the other side is connected to the top of the bottom plate (43). The top of the top plate (42) is provided with a through reserved slot (44), and a movable adjustment body (5) is provided inside the reserved slot (44). The middle of the four side plates (41) is set as a hollow structure. The adjustment body (5) includes an adjustment roller (51), a connecting slider (52), a connecting gear (53), a connecting block (54), and a return spring (55). The bottom bearing of the adjustment roller (51) is connected to the connecting slider (52), and the connecting slider (52) slides inside the reserved groove (44). The bottom of the connecting slider (52) is coaxially connected to the connecting gear (53), and the bottom bearing of the connecting gear (53) is connected to the connecting block (54). The bottom of the connecting block (54) is provided with a return spring (55) connected to the base plate (43). A positioning component is provided on the outside of the connecting gear (53) for positioning. The positioning component includes a limiting component (8) and a pushing component (9). The limiting component (8) is provided on one side of the connecting gear (53). A pushing component (9) for controlling its movement is also provided on the outside of the limiting component (8). The pushing component (9) is connected to one side of the conveying mechanism (10). The limiting component (8) includes a limiting rack (81), a compression spring (82) and a fixing plate (83). The limiting rack (81) is located on one side of the connecting gear (53), and the fixing plate (83) is integrally installed on the bottom of both sides of the limiting rack (81). The compression spring (82) is provided on the outer side of the limiting rack (81) and connected to the inner wall of the side plate (41). The top of the limiting rack (81) is provided with a moving block that slides in the moving groove at the bottom of the top plate (42).

2. The nasal cannula airflow resistance testing device as described in claim 1, characterized in that: The moving body (7) includes a middle rod (71), a reserved slot (72), a connecting vertical rod (73), and a connecting rack (74). The middle rod (71) has a reserved slot (72) in the middle position for engaging with the top end of the test pipe (6). The bottom of both sides of the middle rod (71) is integrally installed with the connecting vertical rod (73), and the bottom of the connecting vertical rod (73) is vertically installed with the connecting rack (74). The top end of the connecting rack (74) is provided with a conveying mechanism (10). The connecting vertical rod (73) slides in the groove at the top of the fixed workbench (3). The outside of the middle rod (71) is also provided with a rotating component (11), and the rotating component (11) engages with the engaging seat (12). The bottom of the connecting rack (74) is integrally installed with a slider (13), and two sets of compression springs (14) are symmetrically arranged on both sides of the slider (13) and connected to the rectangular groove at the bottom of the fixed workbench (3).

3. The nasal cannula airflow resistance testing device as described in claim 1, characterized in that: The pushing assembly (9) includes a rotating shaft (91) and a rotating cam (92). The rotating shaft (91) is coaxially connected to the top of both sides of the rotating cam (92), and the position of the rotating cam (92) corresponds to the position of the fixed plate (83). The outer side of the rotating shaft (91) is connected to the conveying mechanism (10).

4. The nasal cannula airflow resistance testing device as described in claim 1, characterized in that: The transmission mechanism (10) includes a driven pulley (101), a connecting belt (102), a driving gear (103), and a driving pulley (104). The driving gear (103) is located at the top of the connecting rack (74). The driving pulley (104) is coaxially connected to the top of the driving gear (103). The connecting belt (102) is located on the outside of the driving pulley (104) and connected to the driven pulley (101).

5. The nasal cannula airflow resistance testing device as described in claim 4, characterized in that: The driven pulley (101) is coaxially connected to the outer side of the rotating shaft (91), and the driven pulleys (101) on the outer side of the rotating shaft (91) inside the adjacent adjustment worktable (4) are connected by a connecting belt (102).

6. The nasal cannula airflow resistance testing device as described in claim 2, characterized in that: The rotating assembly (11) includes a protruding rod (111) and a rotating rod (112). The protruding rod (111) is integrally installed on the outside of the intermediate rod (71), and the outside of the protruding rod (111) is connected to the rotating rod (112) through a rotating shaft. The rotating rod (112) engages with the groove inside the locking seat (12), and the outside of the locking seat (12) is fixed to the outer wall of the fixed worktable (3).

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