Airflow resistance testing device for nasal oxygen cannula

Abstract

The invention discloses a nasal oxygen cannula airflow resistance testing device, and belongs to the technical field of nasal oxygen canals, the nasal oxygen cannula airflow resistance testing device comprises a tester main body, the tester main body is of a rectangular structure, the top end of the tester main body is provided with a testing connector, the testing connector is used for being clamped with one side of a testing pipeline, and one side of the tester main body is fixedly provided with a fixed workbench; adjusting workbenches are arranged on the outer side of the fixed workbench at equal intervals, and movable adjusting bodies are arranged at the top ends of the adjusting workbenches and used for conducting bending change work on the test pipeline. According to the nasal oxygen cannula airflow resistance testing device, in the whole process, the hand of a worker only needs to press and move the adjusting body, the position of the moved adjusting body can be fixed in cooperation with automatic positioning work of the positioning assembly, therefore, the operation steps of the worker are reduced, and the nasal oxygen cannula airflow resistance testing device is more practical.

Description

Technical Field

[0001] This application relates to the technical field of nasal oxygen tube air flow resistance testing, and particularly relates to a nasal oxygen tube air flow resistance testing device. Background Art

[0002] A nasal oxygen tube is a pipeline device used to deliver oxygen to a patient's nasal cavity. It is usually made of soft plastic or silicone material to ensure wearing comfort and safety. The nasal oxygen tube can deliver oxygen into the patient's body through the nasal cavity, improve the patient's hypoxia condition, and increase the patient's blood oxygen saturation. At the same time, in cases where the patient has respiratory diseases, cardiopulmonary insufficiency, etc., the nasal oxygen tube can also be used as an auxiliary treatment tool to help the patient maintain normal respiratory function. Therefore, the nasal oxygen tube plays a significant role in the medical field. In the existing market, after the nasal oxygen tube is produced, an air flow resistance detection device is required to perform the air flow resistance detection work of the nasal oxygen tube. By detecting the air flow resistance, it can be ensured that when the nasal oxygen tube delivers oxygen, it can provide a stable and required oxygen flow rate. If the resistance is too large, it will lead to insufficient oxygen supply and affect the treatment effect of the patient. Therefore, the nasal oxygen tube air flow resistance detection device is one of the essential devices in the production process of the nasal oxygen tube;

[0003] When the existing market detection device detects the nasal oxygen tube, generally one side of the nasal oxygen tube is connected and clamped to one side of the detection main body. A certain flow rate of gas is delivered into the nasal oxygen tube through the air source main body inside the detection device. The pressure difference at both ends of the nasal oxygen tube is measured by a high-precision pressure sensor, and the air flow resistance is calculated based on the relevant principles of fluid mechanics. The specific operation is to record the change in pressure values (△P = P2 - P1) before and after the nasal oxygen tube is plugged in after adjusting the test pressure and rated flow rate, which is the air flow resistance. The specific detection method is as disclosed in a nasal oxygen tube detection device with the application number 201922335273.2;

[0004] The existing market detection device is connected to an external adjustment mechanism to detect the air flow resistance of nasal oxygen tubes with different bending degrees. However, when the adjustment mechanism is adjusted, different adjustment methods are required for different bending degree adjustments. Therefore, it is very troublesome for the staff to perform the adjustment operation. At the same time, although the nasal oxygen tubes are sampled during detection, the number is still very large. Therefore, when the staff performs long-term detection, they frequently perform various operation tasks, and the workload is extremely large. Such as the various adjustment methods disclosed in a nasal oxygen tube air flow resistance testing device with the application number 202211062048.6. Summary of the Invention

[0005] The object of the present invention is to provide a nasal oxygen tube air flow resistance testing device to solve the problems in the above-mentioned background technology. The current detection devices on the market connect the detector with an external adjustment mechanism to detect the air flow resistance of nasal oxygen tubes with different bending degrees. However, when the adjustment mechanism is adjusted, different adjustment methods are required to adjust to different bending degrees, which makes it very troublesome for the staff to perform adjustment operations. At the same time, although the nasal oxygen tubes are sampled during detection, the number is still very large. Therefore, when the staff performs long-term detection, they need to perform various operations frequently, resulting in a huge workload.

[0006] To achieve the above object, the present invention provides the following technical solution: A nasal oxygen tube air flow resistance testing device includes a tester main body, which is arranged in a rectangular structure, and a test connection head is provided at the top thereof. The test connection head is used to be engaged with one side of the test pipeline. A fixed workbench is fixed on one side of the tester main body, and adjustable workbenches are arranged at equal intervals on the outer side of the fixed workbench. An adjustable main body that moves is provided at the top of the adjustable workbench for bending and changing the test pipeline. A moving main body that moves is provided at the top of the fixed workbench, and a conveying mechanism is connected to a positioning component at the bottom of the moving main body. When the moving main body moves to the topmost position, the position of the positioning component is determined through the conveying mechanism, so as to fix the position of the adjustable main body after movement through the positioning component.

[0007] Preferably, the adjustable workbench includes side plates, a top plate, a bottom plate, and a reserved groove. There are four side plates. One side of the four side plates is connected to the bottom of the top plate, and the other side is connected to the top of the bottom plate. A through reserved groove is provided at the top of the top plate, and an adjustable main body that moves is arranged inside the reserved groove. The middle of the 4 side plates is of a hollow structure.

[0008] Preferably, the adjustable main body includes an adjusting roller, a connecting slider, a connecting gear, a connecting block, and a return spring. The bottom of the adjusting roller is connected to the connecting slider by a bearing, 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 of the connecting gear is connected to the connecting block by a bearing. A return spring is provided at the bottom of the connecting block and is connected to the bottom plate.

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

[0010] Preferably, the moving body includes an intermediate rod, a reserved card slot, a connecting vertical rod, and a connecting rack. A reserved card slot is provided at the middle position of the intermediate rod for engaging with the top bayonet of the test pipe. Connecting vertical rods are integrally installed at the bottom of both sides of the intermediate rod, and a connecting rack is vertically installed at the bottom of the connecting vertical rod. A transmission mechanism is provided at the top of the connecting rack. The connecting vertical rod slides in the sliding groove at the top of the fixed workbench. A rotating assembly is further provided on the outer side of the intermediate rod, and the rotating assembly engages with the engaging seat. A slider is integrally installed at 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 assembly includes a limiting rack, a pressing spring, and a fixing plate. The limiting rack is arranged on one side of the connecting gear, and fixing plates are integrally installed at the bottom of both sides of the limiting rack. A pressing spring is arranged on the outer side of the limiting rack and connected to the inner wall of the side plate. A moving block is provided at the top of the limiting rack and slides in the moving groove at the bottom of the top plate.

[0012] Preferably, the pushing assembly includes a rotating shaft and a rotating cam. Rotating cams are coaxially connected to the top ends of both sides of the rotating shaft, and the positions of the rotating cams correspond to the positions of the fixing plates. The outer side of the rotating shaft is connected to the transmission mechanism.

[0013] Preferably, the transmission mechanism includes a driven pulley, a connecting belt, a driving gear, and a driving pulley. The driving gear is arranged at the top of the connecting rack, and a driving pulley is coaxially connected to the top of the driving gear. A connecting belt is arranged 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 sides of the rotating shafts inside adjacent adjustment workbenches 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 outer side of the intermediate rod, and the rotating rod is connected to the outer side of the protruding rod through a rotating shaft. The rotating rod engages with the groove inside the engaging seat, and the outer side of the engaging seat is fixed to the outer wall of the fixed workbench.

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

[0017] A positioning component is provided, which is arranged outside the adjustment main body. After the test pipeline passes through the inside of the adjustment main body in sequence, the operator only needs to press and move different adjustment main bodies according to the bending requirements, and then the adjustment main body can be moved to different positions arbitrarily. When the positions of the respective adjustment components change, the test pipeline is driven to perform an angle change operation. At this time, through the tester main body, the air flow resistance inside the test pipeline at different bending angles can be completed. During the whole process, the operator only needs to press and move the adjustment main body by hand, and cooperate with the automatic positioning operation of the positioning component, then the position of the moved adjustment main body will be fixed. Thus, the operation steps of the operator are reduced, and it is more practical;

[0018] A moving main body is provided, which is used to assist in pulling and closing between the test pipeline and the test connector. When the moving main body moves to the topmost position, the control rotating component and the engaging seat are engaged to determine the position of the moving main body. Since the movement of the moving main body will trigger the transmission mechanism to work, the positioning component will then perform a positioning operation on the adjustment main body. When the rotating component and the engaging seat are separated later, the moving main body automatically resets, and the positioning component will not limit the adjustment main body. Then the adjustment main body will automatically return to the initial position. At this time, the adjustment test work can be directly carried out again without manual reset by the operator. The operation is very convenient, reducing the work intensity of the operator, and it is more suitable for batch detection production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front view structural schematic diagram of the present invention;

[0020] Figure 2 is a structural schematic diagram of the adjustment workbench arranged at equal intervals of the present invention;

[0021] Figure 3 is a top view structural schematic diagram inside the adjustment workbench of the present invention;

[0022] Figure 4 is a bottom view structural schematic diagram inside the adjustment workbench of the present invention;

[0023] Figure 5 is an enlarged bottom view structural schematic diagram of the adjustment workbench of the present invention;

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

[0025] Figure 7 is a front view structural schematic diagram of the moving main body of the present invention;

[0026] Figure 8Schematic diagram of the upward view structure of the moving body of the present invention;

[0027] Figure 9 For the present invention Figure 1 Enlarged structure schematic diagram at position A in the present invention;

[0028] Figure 10 For the present invention Figure 8 Enlarged structure schematic diagram at position B in the present invention.

[0029] In the figure: 1. Tester main body; 2. Test connector; 3. Fixed workbench; 4. Adjusting workbench; 41. Side plate; 42. Top plate; 43. Bottom plate; 44. Reserved groove; 5. Adjusting main body; 51. Adjusting roller; 52. Connecting slider; 53. Connecting gear; 54. Connecting block; 55. Return spring; 6. Test pipeline; 7. Moving body; 71. Intermediate rod; 72. Reserved card slot; 73. Connecting vertical rod; 74. Connecting rack; 8. Limiting component; 81. Limiting rack; 82. Extrusion spring; 83. Fixed plate; 9. Pushing component; 91. Rotating shaft; 92. Rotating cam; 10. Transmission mechanism; 101. Driven pulley; 102. Connecting belt; 103. Driving gear; 104. Driving pulley; 11. Rotating component; 111. Protruding rod; 112. Rotating rod; 12. Clamping seat; 13. Slider; 14. Compression spring. Detailed implementation manners

[0030] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0031] In the description of the present application, it should be noted that for orientation terms, if there are terms such as "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and position relationships indicated are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

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

[0033] One of the preferred embodiments of the present application is as Figures 1 to 10As shown, a nasal oxygen tube air flow resistance testing device includes a tester main body 1, which is arranged in a rectangular structure, and a test connector 2 is provided at the top thereof. The test connector 2 is used for clamping with one side of a test pipe 6. A fixed workbench 3 is fixed on one side of the tester main body 1, and adjustable workbenches 4 are arranged at equal intervals on the outer side of the fixed workbench 3. An adjustable main body 5 that moves is provided at the top of the adjustable workbench 4 for bending and changing the test pipe 6. A movable main body 7 that moves is provided at the top of the fixed workbench 3, and a transmission mechanism 10 is connected to a positioning component at the bottom of the movable main body 7. When the movable main body 7 moves to the topmost position, the position of the positioning component will be determined through the transmission mechanism 10, so as to fix the position of the adjustable main body 5 after movement through the positioning component;

[0034] This application provides a nasal oxygen tube air flow resistance testing device with a positioning component. Specifically, when in use, first, the entire tester main body 1, fixed workbench 3, and adjustable workbench 4 are set in appropriate positions. Then, it is connected to an external power supply. After that, the nasal oxygen tube to be tested is taken, and the outer side of one side thereof is clamped with the top of the movable main body 7. Then, the nasal oxygen tube and the movable main body 7 are controlled to move together, so that the top of the nasal oxygen tube is clamped with the test connector 2. At the same time, when the movable main body 7 moves, it will control the positioning component to move through the transmission mechanism 10 for limiting. Then the testing work can be carried out. First, the device is started to check whether the air flow resistance inside the straight nasal oxygen tube is qualified. After passing, the next angle change test work is carried out. When carrying out the angle change work completely, the staff only needs to press the adjustable main body 5 at different positions according to the requirements. After pressing, the adjustable main body 5 is controlled to move above the adjustable workbench 4, thereby driving the test pipe 6 to move, thus completing the bending work of the pipe. Then the entire tester main body 1 is started again to complete the detection work. After the detection is completed, the test pipe 6 is separated from the movable main body 7, and then the top of the test connector 2 is pulled out from the top. At this time, the movable main body 7 will automatically reset, so that the positioning component does not limit the adjustable main body 5. At this time, the adjustable main body 5 returns to the initial position again, for the staff to install and detect another test pipe 6 again.

[0035] Among them, according to Figure 1 、 Figure 2 and Figure 5As shown in the figure, the adjustment workbench 4 includes side plates 41, a top plate 42, a bottom plate 43, and a reserved groove 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. A through reserved groove 44 is provided at the top of the top plate 42, and a movable adjustment body 5 is arranged inside the reserved groove 44. The middle of the 4 side plates 41 is of a hollow structure;

[0036] Specifically, when the adjustment body 5 moves, it moves inside the reserved groove 44, and the entire positioning component is arranged in the hollow structure between the 2 side plates 41, which can make the appearance of the entire device more beautiful.

[0037] Furthermore, when the adjustment body 5 is specifically operated, according to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in the figure, 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 of the adjustment roller 51 is connected to the connecting slider 52 by a bearing, 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 of the connecting gear 53 is connected to the connecting block 54 by a bearing. A return spring 55 is arranged at the bottom of the connecting block 54 and is connected to the bottom plate 43;

[0038] Among them, when the staff presses the adjustment body 5, the adjustment roller 51 is lowered. When it is lowered, it drives the bottom connecting slider 52, connecting gear 53, and connecting block 54 to descend together under the action of the return spring 55. When the connecting gear 53 descends, it will be separated from the positioning component. At this time, the positioning component will not limit the connecting gear 53. Therefore, the adjustment roller 51 can be easily pushed, so that the bottom connecting slider 52 can move to any position inside the reserved groove 44. After moving to the appropriate position, release the pressing on the adjustment roller 51 and control it to move upward. At this time, the connecting gear 53 will move upward and engage with the positioning component for limiting, thereby achieving the effect of limiting the moving position of the adjustment body 5;

[0039] Furthermore, when performing the limiting, according to Figure 6 and Figure 7 As shown in the figure, a positioning component is arranged on the outer side of the connecting gear 53 for positioning work. The positioning component includes a limiting component 8 and a pushing component 9. The limiting component 8 is arranged on one side of the connecting gear 53. On the outer side of the limiting component 8, there is also a pushing component 9 for controlling its movement, and the pushing component 9 is connected to one side of the transmission mechanism 10;

[0040] The limiting component 8 includes a limiting rack 81, a compression spring 82 and a fixing plate 83. The limiting rack 81 is arranged on one side of the connecting gear 53, and fixing plates 83 are integrally installed at the bottoms of both sides of the limiting rack 81. An outer side of the limiting rack 81 is connected to an inner wall of the side plate 41 by a compression spring 82. A moving block is arranged at the top end of the limiting rack 81 and slides in a moving groove at the bottom of the top plate 42.

[0041] The pushing component 9 includes a rotating shaft 91 and a rotating cam 92. Rotating cams 92 are coaxially connected to both top ends of the rotating shaft 91, and positions of the rotating cams 92 correspond to positions of the fixing plates 83. An outer side of the rotating shaft 91 is connected to a conveying mechanism 10.

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

[0043] Subsequently, when the moving body 7 is reset, the rotating shaft 91 on the pushing component 9 will rotate in the reverse direction through the conveying mechanism 10, 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. At this time, since the connecting gear 53 does not receive any force in any direction, it will return to its initial position under the action of the reset spring 55 without manual reset.

[0044] As a further preference of this embodiment, according to Figure 2 、 Figure 3 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 shown, the moving body 7 includes an intermediate rod 71, a reserved card slot 72, a connecting vertical rod 73 and a connecting rack 74. A reserved card slot 72 is arranged at the middle position of the intermediate rod 71 for engaging with the top bayonet of the test pipe 6. Connecting vertical rods 73 are integrally installed at the bottoms of both sides of the intermediate rod 71, and a connecting rack 74 is vertically installed at the bottom of the connecting vertical rod 73. A conveying mechanism 10 is arranged at the top end of the connecting rack 74. The connecting vertical rod 73 slides in a sliding groove at the top end of the fixed workbench 3. A rotating component 11 is further arranged on an outer side of the intermediate rod 71, and the rotating component 11 is engaged with a clamping seat 12. A slider 13 is integrally installed at the bottom of the connecting rack 74, and two groups of compression springs 14 are symmetrically arranged on both sides of the slider 13 and are connected to a 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 driving gear 103 and a driving pulley 104. The driving gear 103 is arranged at the top end of the connecting rack 74. A driving pulley 104 is coaxially connected to the top end of the driving gear 103. The connecting belt 102 is arranged outside the driving pulley 104 and connected to the driven pulley 101.

[0046] The driven pulley 101 is coaxially connected to the outside of the rotating shaft 91. The driven pulleys 101 outside the rotating shafts 91 inside adjacent adjusting workbenches 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 middle rod 71. The rotating rod 112 is connected to the outside of the protruding rod 111 through a rotating shaft. The rotating rod 112 is engaged with the groove inside the engaging seat 12, and the outside of the engaging seat 12 is fixed to the outer wall of the fixed workbench 3.

[0048] Among them, when the moving body 7 moves, the test pipe 6 is engaged with the reserved card slot 72 on the middle rod 71. Therefore, when the test pipe 6 moves, it drives the connecting vertical rod 73 at its bottom to move through the middle rod 71. 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 slot. When the connecting rack 74 moves, it meshes with the driving gear 103, so that the driving gear 103 drives the driving pulley 104 coaxially connected to it to rotate. With the arrangement of the connecting belt 102, the driven pulley 101 inside the adjusting workbench 4 adjacent to the fixed workbench 3 will rotate. Then, under the action of the connecting belt 102, the driven pulleys 101 inside each adjusting workbench 4 will all rotate.

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

[0050] Among them, in order to fix the position of the middle rod 71 after it moves, the staff needs to rotate the rotating rod 112 at the top of the protruding rod 111 so that it is engaged inside the engaging seat 12 to complete the fixing work of the position of the middle rod 71. Thus, it is ensured that the test pipe 6 will not become loose, and at the same time, the positioning assembly can also perform positioning work. When the subsequent test pipe 6 is tested and completed, only the rotating rod 112 needs to be separated from the engaging seat 12. At this time, the slider 13 will reset under the action of the compression spring 14. This will drive the middle rod 71 to reset, and then drive the positioning assembly not to limit the adjusting body 5, completing the automatic reset work of the adjusting body 5.

[0051] The foregoing has described the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements will occur to the present application, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A nasal oxygen tube airflow resistance testing device, characterized in that, It includes a tester main body (1) which is arranged in a rectangular structure, and a test connector (2) is provided at the top thereof. The test connector (2) is used for engaging with one side of a test pipe (6). It is characterized in that a fixed workbench (3) is fixed on one side of the tester main body (1), and adjustable workbenches (4) are arranged at equal intervals on the outer side of the fixed workbench (3). An adjustable main body (5) which moves is arranged at the top of the adjustable workbench (4) for performing bending change work on the test pipe (6). A moving main body (7) which moves is arranged at the top of the fixed workbench (3), and a conveying mechanism (10) is arranged at the bottom of the moving main body (7) and is connected to a positioning component. When the moving main body (7) moves to the topmost position, the position of the positioning component is determined through the conveying mechanism (10), so as to fix the position of the adjustable main body (5) after movement through the positioning component.

2. The nasal oxygen tube air flow resistance testing device according to claim 1, characterized in that: The adjustable workbench (4) includes side plates (41), a top plate (42), a bottom plate (43) and a reserved groove (44). Four side plates (41) are provided. 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). A through reserved groove (44) is provided at the top of the top plate (42), and an adjustable main body (5) which moves is arranged inside the reserved groove (44). The middle of the 4 side plates (41) is of a hollow structure.

3. The nasal oxygen tube airflow resistance testing device according to claim 2, characterized in that: The adjustable main 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 of the adjusting roller (51) is connected to the connecting slider (52) through a bearing, 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 of the connecting gear (53) is connected to the connecting block (54) through a bearing. A return spring (55) is arranged at the bottom of the connecting block (54) and is connected to the bottom plate (43).

4. The nasal oxygen tube air flow resistance testing device according to claim 3, characterized in that: A positioning component is arranged on the outer side of the connecting gear (53) for positioning it. The positioning component includes a limiting component (8) and a pushing component (9). The limiting component (8) is arranged on one side of the connecting gear (53). A pushing component (9) for controlling its movement is further arranged on the outer side of the limiting component (8), and the pushing component (9) is connected to one side of the conveying mechanism (10).

5. The nasal oxygen tube air flow resistance testing device according to claim 4, characterized in that: The moving body (7) includes an intermediate rod (71), a reserved card slot (72), a connecting vertical rod (73) and a connecting rack (74). A reserved card slot (72) is arranged at the middle position of the intermediate rod (71) for engaging with the top bayonet of the test pipe (6). Connecting vertical rods (73) are integrally installed at the bottom of both sides of the intermediate rod (71), and a connecting rack (74) is vertically installed at the bottom of the connecting vertical rod (73). A transmission mechanism (10) is arranged at the top of the connecting rack (74). The connecting vertical rod (73) slides in the chute at the top of the fixed workbench (3). A rotating assembly (11) is further arranged on the outer side of the intermediate rod (71), and the rotating assembly (11) engages with the engaging seat (12). A slider (13) is integrally installed at the bottom of the connecting rack (74), and two groups 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).

6. The nasal oxygen tube air flow resistance testing device according to claim 4, wherein: The limiting assembly (8) includes a limiting rack (81), a compression spring (82) and a fixing plate (83). The limiting rack (81) is arranged on one side of the connecting gear (53). Fixing plates (83) are integrally installed at the bottom of both sides of the limiting rack (81). A compression spring (82) is arranged on the outer side of the limiting rack (81) and connected to the inner wall of the side plate (41). A moving block slides in the moving groove at the bottom of the top plate (42) at the top of the limiting rack (81).

7. The nasal oxygen tube air flow resistance testing device according to claim 4, characterized in that: The pushing assembly (9) includes a rotating shaft (91) and a rotating cam (92). Rotating cams (92) are coaxially connected to the top ends of both sides of the rotating shaft (91), and the positions of the rotating cams (92) correspond to the positions of the fixing plates (83). The outer side of the rotating shaft (91) is connected to the transmission mechanism (10).

8. The nasal oxygen tube air flow resistance testing device according to 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 arranged at the top of the connecting rack (74). A driving pulley (104) is coaxially connected to the top of the driving gear (103). A connecting belt (102) is arranged on the outer side of the driving pulley (104) and connected to the driven pulley (101).

9. The nasal oxygen tube air flow resistance testing device according to claim 8, wherein: The driven pulley (101) is coaxially connected to the outer side of the rotating shaft (91). The driven pulleys (101) on the outer sides of the rotating shafts (91) inside adjacent adjusting workbenches (4) are connected by a connecting belt (102).

10. The nasal oxygen tube air flow resistance testing device according to claim 5, 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 outer side of the intermediate rod (71), and the rotating rod (112) is connected to the outer side of the protruding rod (111) through a rotating shaft. The rotating rod (112) engages with the groove inside the engaging seat (12), and the outer side of the engaging seat (12) is fixed to the outer wall of the fixed workbench (3).

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