A multi-caliber lung function mouthpiece

Abstract

The utility model relates to the technical field of medical devices, and specifically to a multi-caliber lung function mouthpiece, including an air outlet pipe and an air blow pipe assembly, wherein the air outlet pipe is used to connect to a lung function detector, and the air outlet pipe is connected to the air blow pipe assembly; the air blow pipe assembly includes a plurality of air blow pipes, and the outer diameters of the plurality of air blow pipes are different, and the plurality of air blow pipes are mutually sleeved, and the air blow pipe with a large outer diameter is sleeved on the outside of the air blow pipe with a small outer diameter, and two adjacent air blow pipes can be retracted, so that the air blow pipe with a small outer diameter can be retracted into the air blow pipe with a large outer diameter, and the air blow pipe with a small outer diameter can be extended from the air blow pipe with a large outer diameter, and the air blow pipe is used to cooperate with the patient's mouth, and the patient's mouth can bite the air blow pipe to perform lung function measurement. The multi-caliber lung function mouthpiece of the present application can improve the convenience of the person to be tested trying out a plurality of air blow pipes with different calibers, and improve the adaptability of the mouthpiece to the mouth size of the person to be tested.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a multi-caliber lung function mouthpiece. Background Art

[0002] Pulmonary function testing is a medical measurement and testing technology based on respiratory physiology. It is an indispensable test item in internal medicine and surgery in modern medicine. Pulmonary function testing is also a commonly used examination method for examining respiratory diseases.

[0003] Usually, a pulmonary function tester is required when performing pulmonary function tests. The pulmonary function tester is usually used in conjunction with a pulmonary function mouthpiece. As a common medical product, the pulmonary function mouthpiece is used in large quantities and is used frequently.

[0004] Although the current lung function mouthpiece can improve the convenience of patients in performing lung function tests during actual use, the inventors found that the current lung function mouthpiece still has some shortcomings during actual use, specifically:

[0005] Usually, lung function mouthpieces have a variety of different diameter specifications. When performing lung function tests, it is necessary to select a mouthpiece that suits the patient according to the size of the patient's mouth to avoid a mouthpiece that is too large or too small. However, in the actual process of selecting a mouthpiece, it is usually difficult for medical staff to accurately measure the mouth size of the person to be tested by visual inspection, so that the selected mouthpiece may not match the mouth size of the person to be tested. If a larger or smaller lung function mouthpiece is selected, the user experience of the person to be tested will be reduced. Among them, a larger mouthpiece diameter will require the person to be tested to open his mouth more laboriously, and a smaller mouthpiece diameter will require the person to be tested to wrap the mouthpiece with his lips more carefully to avoid air leakage, so as to avoid the adverse effects of air leakage on the test results.

[0006] Therefore, based on the problem that the selected mouthpiece of the pulmonary function mouthpiece is not compatible with the mouth size of the person to be tested during use, a multi-caliber pulmonary function mouthpiece is provided to improve the compatibility of the mouthpiece with the mouth size of the person to be tested. Summary of the invention

[0007] The purpose of the utility model is to provide a multi-caliber lung function mouthpiece to improve the adaptability of the mouthpiece to the mouth size of the person to be examined, in view of the problem that the selected mouthpiece is not compatible with the mouth size of the person to be examined during actual use of the current lung function mouthpiece.

[0008] In order to achieve the above-mentioned invention object, the utility model provides the following technical solutions:

[0009] A multi-caliber lung function mouthpiece, comprising an air outlet pipe and an air blow pipe assembly, wherein the air outlet pipe is used to be connected to a lung function detector, and the air outlet pipe is communicated with the air blow pipe assembly;

[0010] The air blowing tube assembly includes a plurality of air blowing tubes, the outer diameters of the plurality of air blowing tubes are different, the plurality of air blowing tubes are sleeved on each other, the air blowing tube with a larger outer diameter is sleeved on the outside of the air blowing tube with a smaller outer diameter, two adjacent air blowing tubes can be extended and retracted, so that the air blowing tube with a smaller outer diameter can be retracted into the air blowing tube with a larger outer diameter, and the air blowing tube with a smaller outer diameter can be extended from the air blowing tube with a larger outer diameter, the air blowing pipeline is used to cooperate with the patient's mouth, and the patient's mouth can bite the air blowing tube to perform lung function measurement.

[0011] As a preferred technical solution of the present application, the air blowing pipe with the largest outer diameter among the plurality of air blowing pipes is the first air blowing pipe, and the first air blowing pipe is connected to the air outlet pipe.

[0012] As a preferred technical solution of the present application, the air blowing tube includes an elastic section and a first hard section, the elastic section is elastic, the first hard section is a hard structure, and the elastic section is used for the patient to bite.

[0013] As a preferred technical solution of the present application, among the two adjacent blowing tubes, when the blowing tube with a smaller outer diameter is retracted into the blowing tube with a larger outer diameter, the elastic section on the blowing tube with a smaller outer diameter corresponds to the elastic section on the blowing tube with a larger outer diameter.

[0014] As a priority technical solution of the present application, among the two adjacent blowing tubes, when the blowing tube with a smaller outer diameter extends out from the blowing tube with a larger outer diameter, the first hard section on the blowing tube with a smaller outer diameter corresponds to the elastic section on the blowing tube with a larger outer diameter, so that there is an extrusion effect between the elastic section on the blowing tube with a larger outer diameter and the corresponding first hard section on the blowing tube with a smaller outer diameter.

[0015] As the priority technical solution of the present application, a limiting assembly is arranged between two adjacent blowing tubes, and the limiting assembly includes a limiting block and a limiting groove. The limiting block is arranged on the blowing tube with a smaller outer diameter, and the limiting groove is arranged on the blowing tube with a larger outer diameter. The limiting block is adapted to the limiting groove, and the length direction of the limiting groove is in the same direction as the length direction of the blowing tube. The limiting groove can move along the length direction of the limiting groove, and the limiting block and the limiting groove cooperate to limit the maximum elongation of the blowing tube with a smaller outer diameter when it extends from the blowing tube with a larger outer diameter.

[0016] As a priority technical solution of the present application, the air blowing tube also includes a second hard segment, the elastic segment is located in the area between the first hard segment and the second hard segment, the second hard segment is a hard structure, and when the patient bites the elastic segment, the second hard segment can be stuck in the patient's mouth to prevent the air blowing tube from falling out of the patient's mouth.

[0017] As a priority technical solution of the present application, in two adjacent blowing tubes, a stopper is provided on the second hard section on the blowing tube with a smaller outer diameter, and the stopper is used to offset the second hard section on the blowing tube with a larger outer diameter to limit the retraction of the blowing tube with a smaller outer diameter to the maximum retraction amount of the blowing tube with a larger outer diameter.

[0018] As a preferred technical solution of the present application, an annular protrusion is provided on the outer wall of the first air blowing pipe.

[0019] As a preferred technical solution of the present application, the cross-sectional shape of the air blowing tube is circular.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. By setting up a plurality of insufflation tubes, the insufflation tubes are mutually nested, wherein the insufflation tube with a small outer diameter can be pulled out from the insufflation tube with a large outer diameter, and the insufflation tube with a small outer diameter can also be retracted into the insufflation tube with a large outer diameter. When performing pulmonary function testing, medical staff can roughly predict the mouth size of the person to be tested, and select the corresponding insufflation tube, and pull the selected insufflation tube out of the insufflation tube with a large outer diameter. After trying it out, the person to be tested can know whether the size of his insufflation tube and mouth are suitable. If the selected insufflation tube is suitable, the insufflation tube can be used. If the trachea is larger or smaller, the selected insufflation tube can be retracted into the insufflation tube with a larger outer diameter, and then the adjacent insufflation tube is selected, and the adjacent insufflation tube is pulled out and tried again, until the insufflation tube that matches the mouth size is selected. At the same time, when the person to be tested tries multiple insufflation tubes, there is no need to remove the mouthpiece of the present application from the pulmonary function tester, which can improve the convenience of the person to be tested to try multiple insufflation tubes with different calibers, and improve the adaptability of the mouthpiece to the mouth size of the person to be tested;

[0022] 2. Furthermore, in two adjacent insufflation tubes, when the insufflation tube with a smaller outer diameter is retracted into the insufflation tube with a larger outer diameter, the elastic section on the insufflation tube with a smaller outer diameter corresponds to the elastic section on the insufflation tube with a larger outer diameter, so that there is no first hard section inside the elastic section bitten by the patient's mouth, so that the area bitten by the patient's mouth is an elastic or soft structure, which can further improve the comfort of the patient's mouth biting the insufflation tube and further improve the fit between the patient's mouth and the insufflation tube;

[0023] 3. Furthermore, in two adjacent air blowing tubes, when the air blowing tube with a smaller outer diameter extends from the air blowing tube with a larger outer diameter, the first hard section on the air blowing tube with a smaller outer diameter corresponds to the elastic section on the air blowing tube with a larger outer diameter, and there is a squeezing effect between the elastic section on the air blowing tube with a larger outer diameter and the first hard section on the corresponding air blowing tube with a smaller outer diameter. On the one hand, the stability of the nesting of the two adjacent air blowing tubes can be improved, and the resistance to the relative movement of the two adjacent air blowing tubes can be increased. On the other hand, when the elastic section and the first hard section are squeezed, the gap between the two adjacent air blowing tubes can be reduced or even avoided, thereby reducing or even avoiding air leakage during the blowing process, and improving the accuracy of pulmonary function measurement;

[0024] 4. Furthermore, by providing a second hard section, when the patient bites the elastic section, the second hard section can be stuck in the patient's mouth, thereby preventing the air tube from falling out of the patient's mouth and improving the stability of the air tube when it cooperates with the patient's mouth. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of one embodiment of a multi-caliber lung function mouthpiece of the present application;

[0026] Figure 2 This is a schematic cross-sectional view of one embodiment of a multi-caliber lung function mouthpiece of the present application;

[0027] Figure 3 A multi-caliber lung function mouthpiece is applied for this purpose Figure 2 A schematic diagram of the enlarged structure of part A;

[0028] Figure 4 This is a schematic diagram of the structure of a multi-caliber lung function mouthpiece in one embodiment of the present application when the air tube is extended;

[0029] Markings in the figure: 1-air outlet pipe, 2-air blowing pipe assembly, 3-air blowing pipe, 4-first air blowing pipe, 5-elastic section, 6-first hard section, 7-limiting assembly, 8-limiting block, 9-limiting groove, 10-second hard section, 11-stopper, 12-protrusion. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0031] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] Embodiment 1: This embodiment provides a multi-caliber lung function mouthpiece, see Figure 1-Figure 4 As shown, it includes an air outlet pipe 1 and an air blowing pipe assembly 2, wherein the air outlet pipe 1 is used to be connected to a pulmonary function detector, and the air outlet pipe 1 is connected to the air blowing pipe assembly 2;

[0036] The air blowing tube assembly 2 includes a plurality of air blowing tubes 3, and the outer diameters of the plurality of air blowing tubes 3 are different. The plurality of air blowing tubes 3 are sleeved on each other, and the air blowing tube 3 with a larger outer diameter is sleeved on the outside of the air blowing tube 3 with a smaller outer diameter. Two adjacent air blowing tubes 3 can be extended and retracted, so that the air blowing tube 3 with a smaller outer diameter can be retracted into the air blowing tube 3 with a larger outer diameter, and the air blowing tube 3 with a smaller outer diameter can be extended from the air blowing tube 3 with a larger outer diameter. The air blowing tube 3 is used to cooperate with the patient's mouth, and the patient's mouth can bite the air blowing tube 3 to perform lung function measurement.

[0037] In the present application, a plurality of air blowing tubes 3 are provided, wherein the air blowing tubes 3 with a small outer diameter can be drawn out from the air blowing tube 3 with a large outer diameter, and the air blowing tube 3 with a small outer diameter can also be retracted into the air blowing tube 3 with a large outer diameter. When performing pulmonary function testing, medical staff can roughly predict the mouth size of the person to be tested, and select the corresponding air blowing tube 3, and draw the selected air blowing tube 3 out of the air blowing tube 3 with a large outer diameter. After trying it out, the person to be tested can know whether the air blowing tube 3 and the mouth size are adapted. If the air blowing tube 3 is adapted, the person to be tested can know whether the air blowing tube 3 and the mouth size are adapted. If the selected air tube 3 is larger or smaller, the selected air tube 3 can be retracted into the air tube 3 with a larger outer diameter, and then an adjacent air tube 3 can be selected, and the adjacent air tube 3 can be pulled out and tried again, until the air tube 3 that matches the mouth size is selected. At the same time, when the person to be tested tries multiple air tubes 3, there is no need to remove the mouthpiece of the present application from the pulmonary function tester, which can improve the convenience for the person to be tested to try multiple air tubes 3 with different calibers, and improve the adaptability of the mouthpiece to the mouth size of the person to be tested.

[0038] As a preferred implementation, on the basis of the above-mentioned manner, further, the air blowing pipe 3 with the largest outer diameter among the plurality of air blowing pipes 3 is the first air blowing pipe 4 , and the first air blowing pipe 4 is connected to the air outlet pipe 1 .

[0039] Furthermore, the first air blowing tube 4 is connected to the air outlet tube 1. When the first air blowing tube 4 is selected for the person to be inspected to bite, the air blowing tubes 3 except the first air blowing tube 4 are retracted into the first air blowing tube 4. When the air blowing tubes 3 except the first air blowing tube 4 are selected for the person to be inspected to bite, the selected air blowing tube 3 and the air blowing tube 3 sleeved in the air blowing tube 3 can be pulled out together. In this way, the convenience of the air blowing tube assembly 2 for connecting to the air outlet tube 1 can be improved, and it is also convenient to select the air blowing tube 3 of a suitable size for the person to be inspected to use.

[0040] As a preferred embodiment, on the basis of the above-mentioned method, further, the air blowing tube 3 includes an elastic section 5 and a first hard section 6, the elastic section 5 is elastic, the first hard section 6 is a hard structure, and the elastic section 5 is used for the patient to bite.

[0041] Furthermore, by providing the first hard section 6, the stability of the nesting of two adjacent air blowing tubes 3 can be improved. At the same time, by providing the elastic section 5, the patient's mouth can bite the elastic section 5, thereby improving the stability and comfort of the patient's mouth biting the air blowing tube 3.

[0042] As a preferred embodiment, on the basis of the above method, further, in two adjacent blowing tubes 3, when the blowing tube 3 with a smaller outer diameter is retracted into the blowing tube 3 with a larger outer diameter, the elastic section 5 on the blowing tube 3 with a smaller outer diameter corresponds to the elastic section 5 on the blowing tube 3 with a larger outer diameter.

[0043] Furthermore, in two adjacent air blowing tubes 3, when the air blowing tube 3 with a smaller outer diameter is retracted into the air blowing tube 3 with a larger outer diameter, the elastic section 5 on the air blowing tube 3 with a smaller outer diameter corresponds to the elastic section 5 on the air blowing tube 3 with a larger outer diameter, so that there is no first hard section 6 on the inner side of the elastic section 5 bitten by the patient's mouth, so that the area bitten by the patient's mouth is an elastic or soft structure, which can further improve the comfort of the patient's mouth biting the air blowing tube 3 and further improve the fit between the patient's mouth and the air blowing tube 3.

[0044] As a preferred embodiment, on the basis of the above-mentioned method, further, in two adjacent blowing tubes 3, when the blowing tube 3 with a smaller outer diameter extends out from the blowing tube 3 with a larger outer diameter, the first hard section 6 on the blowing tube 3 with a smaller outer diameter corresponds to the elastic section 5 on the blowing tube 3 with a larger outer diameter, so that there is an extrusion effect between the elastic section 5 on the blowing tube 3 with a larger outer diameter and the corresponding first hard section 6 on the blowing tube 3 with a smaller outer diameter.

[0045] Furthermore, in two adjacent air blowing tubes 3, when the air blowing tube 3 with a smaller outer diameter extends out from the air blowing tube 3 with a larger outer diameter, the first hard section 6 on the air blowing tube 3 with a smaller outer diameter corresponds to the elastic section 5 on the air blowing tube 3 with a larger outer diameter, and there is an extrusion effect between the elastic section 5 on the air blowing tube 3 with a larger outer diameter and the first hard section 6 on the corresponding air blowing tube 3 with a smaller outer diameter. On the one hand, the stability of the nesting of the two adjacent air blowing tubes 3 can be improved, and the resistance to the relative movement of the two adjacent air blowing tubes 3 can be increased. On the other hand, when the elastic section 5 is squeezed with the first hard section 6, the gap between the two adjacent air blowing tubes 3 can be reduced or even avoided, thereby reducing or even avoiding air leakage during the blowing process, and improving the accuracy of pulmonary function measurement.

[0046] Embodiment 2: Based on the technical solution of embodiment 1, further, see Figure 1-Figure 4 As shown, a limiting assembly 7 is arranged between two adjacent blowing tubes 3, and the limiting assembly 7 includes a limiting block 8 and a limiting groove 9. The limiting block 8 is arranged on the blowing tube 3 with a small outer diameter, and the limiting groove 9 is arranged on the blowing tube 3 with a large outer diameter. The limiting block 8 is adapted to the limiting groove 9, and the length direction of the limiting groove 9 is in the same direction as the length direction of the blowing tube 3. The limiting groove 9 can move along the length direction of the limiting groove 9, and the limiting block 8 cooperates with the limiting groove 9 to limit the maximum elongation of the blowing tube 3 with a small outer diameter when it extends out of the blowing tube 3 with a large outer diameter.

[0047] Furthermore, by setting a limit assembly 7, it is convenient to limit the maximum extension of the blowing tube 3 with a smaller outer diameter when it extends from the blowing tube 3 with a larger outer diameter, thereby preventing the two adjacent blowing tubes 3 from detaching and improving the stability of the nesting of the two adjacent blowing tubes 3.

[0048] As a preferred embodiment, on the basis of the above method, further, the air blowing tube 3 also includes a second hard segment 10, the elastic segment 5 is located in the area between the first hard segment 6 and the second hard segment 10, and the second hard segment 10 is a hard structure. When the patient bites the elastic segment 5, the second hard segment 10 can be stuck in the patient's mouth to prevent the air blowing tube 3 from falling out of the patient's mouth.

[0049] Furthermore, by providing the second hard segment 10, when the patient bites the elastic segment 5, the second hard segment 10 can be stuck in the patient's mouth, thereby preventing the air blowing tube 3 from falling out of the patient's mouth and improving the stability of the air blowing tube 3 when it cooperates with the patient's mouth.

[0050] As a preferred embodiment, on the basis of the above-mentioned method, further, in two adjacent blowing tubes 3, a stopper 11 is provided on the second hard section 10 on the blowing tube 3 with a smaller outer diameter, and the stopper 11 is used to resist the second hard section 10 on the blowing tube 3 with a larger outer diameter, so as to limit the retraction of the blowing tube 3 with a smaller outer diameter to the maximum retraction amount of the blowing tube 3 with a larger outer diameter.

[0051] Furthermore, by providing a stopper 11 to limit the maximum retraction amount of the blowing tube 3 with a smaller outer diameter to the blowing tube 3 with a larger outer diameter, the two adjacent blowing tubes 3 can be further prevented from being separated, and the stability of the nesting of the two adjacent blowing tubes 3 can be further improved. At the same time, the stopper 11 can be elastic so as to assemble the two separated blowing tubes 3 into a nested shape.

[0052] As a preferred embodiment, on the basis of the above-mentioned embodiment, further, an annular protrusion 12 is provided on the outer wall of the first blowing pipe 4 .

[0053] Furthermore, by providing an annular raised portion 12, when the patient bites the air tube 3 with his mouth, the patient's lips can abut against the raised portion 12, and the raised portion 12 can limit the depth of the air tube 3 extending into the patient's mouth, thereby preventing the air tube 3 from extending too deeply into the mouth, and improving the safety of the mouthpiece of the present application.

[0054] As a preferred implementation, based on the above implementation, further, the cross-sectional shape of the air blowing pipe 3 is circular.

[0055] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A multi-caliber lung function mouthpiece, characterized in that: It includes an air outlet pipe and an air blow pipe assembly, wherein the air outlet pipe is used to be connected to a pulmonary function detector, and the air outlet pipe is connected to the air blow pipe assembly; The air blowing tube assembly includes a plurality of air blowing tubes, the outer diameters of the plurality of air blowing tubes are different, the plurality of air blowing tubes are sleeved on each other, the air blowing tube with a larger outer diameter is sleeved on the outside of the air blowing tube with a smaller outer diameter, two adjacent air blowing tubes can be extended and retracted, so that the air blowing tube with a smaller outer diameter can be retracted into the air blowing tube with a larger outer diameter, and the air blowing tube with a smaller outer diameter can be extended from the air blowing tube with a larger outer diameter, the air blowing pipeline is used to cooperate with the patient's mouth, and the patient's mouth can bite the air blowing tube to perform lung function measurement.

2. A multi-caliber lung function mouthpiece as claimed in claim 1, characterized in that: The air blowing pipe with the largest outer diameter among the plurality of air blowing pipes is the first air blowing pipe, and the first air blowing pipe is connected to the air outlet pipe.

3. A multi-caliber lung function mouthpiece as claimed in claim 2, characterized in that: The air blowing tube comprises an elastic section and a first hard section, the elastic section is elastic, the first hard section is a hard structure, and the elastic section is used for being bitten by the patient's mouth.

4. A multi-caliber lung function mouthpiece as claimed in claim 3, characterized in that: In two adjacent air blowing tubes, when the air blowing tube with a smaller outer diameter is retracted into the air blowing tube with a larger outer diameter, the elastic section on the air blowing tube with a smaller outer diameter corresponds to the elastic section on the air blowing tube with a larger outer diameter.

5. A multi-caliber lung function mouthpiece as claimed in claim 4, characterized in that: When the blowing tube with a smaller outer diameter extends from the blowing tube with a larger outer diameter in two adjacent blowing tubes, the first hard section on the blowing tube with a smaller outer diameter corresponds to the elastic section on the blowing tube with a larger outer diameter, so that there is an extrusion effect between the elastic section on the blowing tube with a larger outer diameter and the first hard section on the corresponding blowing tube with a smaller outer diameter.

6. A multi-caliber lung function mouthpiece as claimed in claim 5, characterized in that: A limiting assembly is arranged between two adjacent blowing tubes, and the limiting assembly includes a limiting block and a limiting groove. The limiting block is arranged on the blowing tube with a smaller outer diameter, and the limiting groove is arranged on the blowing tube with a larger outer diameter. The limiting block is adapted to the limiting groove, and the length direction of the limiting groove is in the same direction as the length direction of the blowing tube. The limiting groove can move along the length direction of the limiting groove, and the limiting block cooperates with the limiting groove to limit the maximum elongation of the blowing tube with a smaller outer diameter when it extends from the blowing tube with a larger outer diameter.

7. A multi-caliber lung function mouthpiece as claimed in claim 6, characterized in that: The air blowing tube also includes a second hard section, the elastic section is located in the area between the first hard section and the second hard section, the second hard section is a hard structure, and when the patient bites the elastic section, the second hard section can be stuck in the patient's mouth to prevent the air blowing tube from falling out of the patient's mouth.

8. A multi-caliber lung function mouthpiece as claimed in claim 7, characterized in that: In two adjacent air blowing tubes, a stopper is provided on the second hard section on the air blowing tube with a smaller outer diameter, and the stopper is used to abut against the second hard section on the air blowing tube with a larger outer diameter to limit the maximum retraction amount of the air blowing tube with a smaller outer diameter to the air blowing tube with a larger outer diameter.

9. A multi-caliber lung function mouthpiece as claimed in claim 8, characterized in that: An annular convex portion is arranged on the outer wall of the first air blowing pipe.

10. A multi-caliber lung function mouthpiece as claimed in claim 9, characterized in that: The cross-section of the air blowing pipe is in the shape of a circular ring.

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