Filter and spirometer

Abstract

This utility model belongs to the technical field of pulmonary function testing instruments, and discloses a filter and a pulmonary function testing instrument. The filter includes a mouthpiece, a filter housing, a fastening mechanism, and a sealing mechanism. One end of the mouthpiece has an air inlet. The filter housing includes an air inlet pipe, which is detachably connected to the end of the mouthpiece away from the air inlet. The fastening mechanism includes a fastening protrusion disposed on the mouthpiece. The air inlet pipe has a fastening groove, which includes a guide section and a locking section, the guide section and the locking section being angled. The sealing mechanism includes a sealing ring and a sealing edge. The sealing ring is disposed on one of the mouthpiece and the air inlet pipe, and the sealing edge is disposed on the other. The sealing ring and the sealing edge can selectively abut against each other. The mouthpiece has a locked state and an unlocked state. When the mouthpiece is in the locked state, the fastening protrusion is located within the locking section, and the sealing ring abuts against the sealing edge. This improves the connection stability and sealing performance at the connection between the mouthpiece and the filter housing.

Description

Technical Field

[0001] This utility model relates to the field of pulmonary function testing equipment, and in particular to a filter and a pulmonary function testing equipment. Background Technology

[0002] A pulmonary function testing device is a medical device used to assess respiratory system function. In the medical and emergency fields, pulmonary function testing devices can examine lung ventilation function, diffusion capacity, etc., and have important clinical value in early diagnosis, disease severity assessment, prognosis judgment, drug efficacy assessment, and surgical tolerance assessment.

[0003] As an important component of the air intake system of a pulmonary function testing instrument, the filter can be used to filter dust, bacteria, viruses and other particles in the air, thereby preventing cross-infection and improving the cleanliness of the treatment environment.

[0004] The filter consists of a housing and a nozzle. The nozzle is fitted onto the air inlet end of the housing, allowing gas to enter the housing and be filtered by the filter elements inside. However, since the nozzle and housing are only connected by a fitting, the connection may loosen, affecting the overall stability of the filter. Furthermore, the connection between the nozzle and housing may not be well sealed, leading to a risk of gas leakage when gas enters the filter from the nozzle, thus reducing filtration efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a filter and a pulmonary function testing instrument to solve the problem of poor connection stability and sealing at the connection between the mouthpiece and the housing.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, a filter includes: a mouthpiece having an air outlet at one end; a filter housing including an air inlet pipe detachably connected to the end of the mouthpiece facing away from the air outlet; a fastening mechanism including a fastening protrusion disposed on the mouthpiece, the fastening mechanism including the fastening protrusion, the air inlet pipe having a fastening groove for sliding the fastening protrusion, the fastening groove including a guide section and a locking section, the guide section and the locking section being angled; and a sealing mechanism including a sealing ring and a sealing edge, the sealing ring being disposed on one of the mouthpiece and the air inlet pipe, the sealing edge being disposed on the other of the mouthpiece and the air inlet pipe, the sealing ring and the sealing edge being selectively abutting; the mouthpiece having a locked state and an unlocked state, the mouthpiece being in the locked state, the fastening protrusion being located within the locking section, and the sealing ring abutting the sealing edge.

[0008] Preferably, the sealing ring is disposed on the inner wall of the air intake pipe, and the sealing edge is disposed at the end of the nozzle facing the air intake pipe.

[0009] Preferably, the guide section extends along the axial direction of the intake pipe, and the locking section extends along the circumferential direction of the intake pipe.

[0010] Preferably, the bottom surface of the locking section is flush with the end face of the sealing ring facing the mouthpiece.

[0011] Preferably, the fastening mechanism further includes a safety protrusion disposed within the locking section, wherein when the mouthpiece is in the locked state, the fastening protrusion abuts against the safety protrusion.

[0012] Preferably, at least two fastening protrusions are provided, and the fastening protrusions are circumferentially spaced at one end of the mouthpiece facing the air inlet pipe, and the fastening protrusions are provided in a one-to-one correspondence with the fastening grooves.

[0013] Preferably, the sealing ring is made of an elastic material.

[0014] Preferably, the filter housing further includes a filter chamber and an air outlet pipe. One end of the filter chamber is connected to the end of the air inlet pipe away from the mouthpiece, and the other end is connected to the air outlet pipe. The air inlet pipe, the filter chamber, and the air outlet pipe are coaxially arranged, and a filter element is disposed inside the filter chamber.

[0015] Preferably, the inner wall of the filter chamber is provided with a clamping groove, and the outer edge of the filter element is engaged in the clamping groove; and / or, the inner wall of the filter chamber is provided with two sets of clamping ribs, and the two sets of clamping ribs are respectively provided on both sides of the filter element to restrict the position of the filter element.

[0016] Secondly, a pulmonary function testing device includes a testing device body and a filter as described above, the filter being connected to the testing device body.

[0017] The beneficial effects of this utility model are:

[0018] A filter includes a nozzle, a filter housing, a fastening mechanism, and a sealing mechanism. One end of the nozzle has an air outlet. The filter housing includes an air inlet pipe, which is detachably connected to the end of the nozzle opposite the air outlet. The fastening mechanism includes a fastening protrusion disposed on the nozzle. The air inlet pipe has a fastening groove for sliding the fastening protrusion, and the fastening groove includes a guide section and a locking section, which are angled together. The sealing mechanism includes a sealing ring and a sealing edge. The sealing ring is disposed on one of the nozzle and the air inlet pipe, and the sealing edge is disposed on the other. The sealing ring and the sealing edge can selectively abut against each other. The nozzle has a locked state and an unlocked state. When the nozzle is in the locked state, the fastening protrusion is located within the locking section, and the sealing ring abuts against the sealing edge.

[0019] In this way, the fastening protrusion moves within the fastening groove, which fixes the relative position of the nozzle and the filter housing, preventing the nozzle from falling off the filter housing and improving the connection stability at the connection between the nozzle and the filter housing. When the nozzle is in the locked state, the sealing edge abuts against the sealing ring, which improves the sealing performance at the connection between the nozzle and the filter housing, prevents gas leakage during blowing, and improves filtration efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first structure of the filter in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the second structure of the filter in one embodiment of the present invention;

[0022] Figure 3 This is a partial cross-sectional view of the filter in one embodiment of the present invention;

[0023] Figure 4 This is an anatomical view of the filter in one embodiment of the present invention.

[0024] In the picture:

[0025] 1. Nozzle; 11. Air inlet; 12. Air pipe; 13. Connecting pipe; 2. Filter housing; 21. Air inlet pipe; 211. Fastening groove; 2111. Guide section; 2112. Locking section; 22. Filter chamber; 221. Filter plate; 222. Clamping groove; 223. Clamping rib; 23. Air outlet pipe; 3. Fastening mechanism; 31. Fastening protrusion; 32. Safety protrusion; 4. Sealing mechanism; 41. Sealing ring; 42. Sealing edge. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] See Figures 1-3This utility model provides a filter, including a nozzle 1, a filter housing 2, a fastening mechanism 3, and a sealing mechanism 4. One end of the nozzle 1 has an air outlet 11. The filter housing 2 includes an air inlet pipe 21, which is detachably connected to the end of the nozzle 1 facing away from the air outlet 11. The fastening mechanism 3 includes a fastening protrusion 31, which is disposed on the nozzle 1. The air inlet pipe 21 has a fastening groove 211 for the fastening protrusion 31 to slide in. The fastening groove 211 includes a guide section 2111 and a locking section 2112. The guide section 2111 and the locking section 2112 are set at an angle; the sealing mechanism 4 includes a sealing ring 41 and a sealing edge 42. The sealing ring 41 is set on one of the mouthpiece 1 and the air inlet pipe 21, and the sealing edge 42 is set on the other of the mouthpiece 1 and the air inlet pipe 21. The sealing ring 41 and the sealing edge 42 can be selectively abutted; the mouthpiece 1 has a locked state and an unlocked state. When the mouthpiece 1 is in the locked state, the fastening protrusion 31 is located in the locking section 2112, and the sealing ring 41 abuts against the sealing edge 42.

[0031] In this embodiment, the mouthpiece 1 includes an air blowing tube 12 and a connector tube 13. The air blowing tube 12 and the connector tube 13 are integrally formed. The air blowing port 11 is located at the end of the air blowing tube 12 away from the connector tube 13, and the air blowing port 11 is inclined to facilitate the person being inspected to blow air and improve the fit between the mouth and the air blowing port 11. The fastening protrusion 31 is fixedly located at the end of the connector tube 13 away from the air blowing tube 12, and the shape of the fastening groove 211 is adapted to the shape of the fastening protrusion 31.

[0032] It should be noted that when assembling the filter, the fastening protrusion 31 is aligned with the inlet of the guide section 2111, and the fastening protrusion 31 is slid along the extension direction of the guide section 2111 and reaches the inlet of the locking section 2112. The moving direction is adjusted so that the fastening protrusion 31 moves to the end of the locking section 2112 away from the guide section 2111, so that the nozzle 1 is in the locked state and the nozzle 1 is locked to the filter housing 2.

[0033] Thus, by moving the fastening protrusion 31 within the fastening groove 211, the nozzle 1 and the filter housing 2 can be locked, improving the connection stability at the connection between the nozzle 1 and the filter housing 2. Furthermore, when the nozzle 1 is in the locked state, the sealing edge 42 abuts against the sealing ring 41, thereby enhancing the sealing performance at the connection between the nozzle 1 and the filter housing 2, preventing gas from leaking to the outside from the connection between the nozzle 1 and the filter housing 2 during the blowing process, and improving the filtration efficiency.

[0034] It is understood that the shape of the fastening protrusion 31 can be circular, conical, square, etc., and can be flexibly adjusted according to actual needs. This embodiment does not limit this.

[0035] See Figure 2 and Figure 3In some embodiments, a sealing ring 41 is disposed on the inner wall of the air inlet pipe 21, and a sealing edge 42 is disposed at the end of the mouthpiece 1 facing the air inlet pipe 21.

[0036] In this embodiment, the sealing ring 41 protrudes from the inner wall of the air intake pipe 21 and is located below the fastening groove 211. The sealing edge 42 is the end face of the insertion pipe 13 facing the air intake pipe 21. The width of the sealing ring 41 is not less than the width of the sealing edge 42.

[0037] Thus, when the fastening protrusion 31 moves to the locked position, the sealing edge 42 abuts against the sealing ring 41, forming a sealed space between the inside of the nozzle 1 and the inside of the filter housing 2, reducing the risk of air leakage. This not only improves the connection stability at the connection between the nozzle 1 and the filter housing 2, but also provides a certain friction after the sealing edge 42 abuts against the sealing ring 41, which further fixes the relative position of the nozzle 1 and the filter housing 2 in the locked state, improving the connection stability at the connection between the nozzle 1 and the filter housing 2.

[0038] It is understandable that the sealing edge 42 can also be set on the inner wall of the air inlet pipe 21, and the sealing ring 41 is fixedly set on the outer wall of the end of the insertion pipe 13 facing the mouthpiece 1. The specific setting positions of the sealing edge 42 and the sealing ring 41 can be flexibly adjusted according to actual needs, as long as the connection between the mouthpiece 1 and the filter housing 2 can be sealed. No further details are provided here.

[0039] See Figure 3 In some embodiments, the sealing ring 41 is made of an elastic material.

[0040] In this way, the sealing ring 41 and the sealing edge 42 can achieve a tight fit, further enhancing the sealing performance at the connection between the nozzle 1 and the filter housing 2.

[0041] It is understood that the sealing ring 41 can be made of materials such as rubber and silicone. The specific material of the sealing ring 41 can be flexibly adjusted, and this embodiment does not limit it.

[0042] See Figure 4 In some embodiments, the guide section 2111 extends along the axial direction of the air intake pipe 21, and the locking section 2112 extends along the circumferential direction of the air intake pipe 21. That is, the length direction of the guide section 2111 is parallel to the height direction of the air intake pipe 21. One end of the locking section 2112 is connected to the end of the guide section 2111 away from the mouthpiece 1, and the other end extends horizontally along the circumferential direction of the air intake pipe 21. The guide section 2111 is perpendicular to the locking section 2112.

[0043] Thus, the guide section 2111 can guide the fastening protrusion 31. After the fastening protrusion 31 moves into place in the guide section 2111, the fastening protrusion 31 is rotated to enter the locking section 2112. The fastening protrusion 31 located in the locking section 2112 is restricted in the vertical direction, which can lock the nozzle 1 and the filter housing 2, prevent the nozzle 1 from falling off, and improve the connection stability at the connection between the nozzle 1 and the filter housing 2.

[0044] It is understandable that the angle between the guide section 2111 and the locking section 2112 can be acute or obtuse, as long as it can achieve the snap-fit ​​setting between the nozzle 1 and the filter housing 2. No further examples will be listed here.

[0045] See Figure 4 In some embodiments, the bottom surface of the locking section 2112 is flush with the end face of the sealing ring 41 facing the mouthpiece 1, that is, when the fastening protrusion 31 is located inside the locking section 2112, the fastening protrusion 31 abuts against the sealing ring 41.

[0046] Thus, the fastening protrusion 31 abuts against the sealing ring 41, which can increase the area of ​​the sealing connection, thereby improving the sealing effect at the connection between the nozzle 1 and the filter housing 2.

[0047] It is understandable that the locking section 2112 can also be spaced apart from the sealing ring 41. When the nozzle 1 is in the locked state, it is sufficient to ensure that the fastening protrusion 31 is located inside the locking section 2112 and the sealing ring 41 is in close contact with the sealing edge 42. This will not be elaborated here.

[0048] See Figure 2 and Figure 3 In some embodiments, the fastening mechanism 3 further includes a safety protrusion 32, which is disposed within the locking section 2112. When the mouthpiece 1 is in the locked state, the fastening protrusion 31 abuts against the safety protrusion 32.

[0049] In this embodiment, the safety protrusion 32 is disposed at one end of the locking section 2112 away from the guide section 2111, and the protrusion height of the safety protrusion 32 is less than the recess depth of the locking section 2112. When the mouthpiece 1 is rotated to move the fastening protrusion 31 away from the guide section 2111, the fastening protrusion 31 abuts against the safety protrusion 32 and squeezes the safety protrusion 32, causing the safety protrusion 32 to be opened. The fastening protrusion 31 moves further and abuts tightly against the safety protrusion 32, thereby locking the fastening protrusion 31.

[0050] Thus, the safety bump 32 can restrict the fastening bump 31 from sliding back to the guide section 2111, reducing the risk of the insertion pipe 13 coming out of the air inlet pipe 21 and further improving the connection stability at the connection between the nozzle 1 and the filter housing 2.

[0051] It is understandable that the safety protrusion 32 can also be an elastic snap-fit ​​structure. The specific shape of the safety protrusion 32 can be flexibly adjusted according to actual needs, as long as it can restrict the position of the fastening protrusion 31 within the locking section 2112. This will not be elaborated here.

[0052] See Figure 2 and Figure 3 In some embodiments, at least two fastening protrusions 31 are provided, and the fastening protrusions 31 are circumferentially spaced at one end of the mouthpiece 1 facing the air inlet pipe 21. The fastening protrusions 31 and fastening grooves 211 are provided in a one-to-one correspondence. In this embodiment, there are two fastening protrusions 31 and two fastening grooves 211.

[0053] Thus, the multiple fastening protrusions 31 respectively cooperate with the corresponding fastening grooves 211, which can make the nozzle 1 and the filter housing 2 stably locked together, reduce the risk of the insertion pipe 13 coming out of the air inlet pipe 21, and improve the connection stability and sealing of the nozzle 1 and the filter housing 2.

[0054] It is understood that the number of fastening protrusions 31 and fastening grooves 211 is not limited to two, and may also include three, four, etc. This embodiment does not limit this.

[0055] See Figure 1 and Figure 4 In some embodiments, the filter housing 2 further includes a filter chamber 22 and an air outlet pipe 23. One end of the filter chamber 22 is connected to the end of the air inlet pipe 21 away from the mouthpiece 1, and the other end is connected to the air outlet pipe 23. The air inlet pipe 21, the filter chamber 22, and the air outlet pipe 23 are coaxially arranged, and a filter sheet 221 is provided inside the filter chamber 22.

[0056] The cross-sectional area of ​​the filter chamber 22 is larger than that of the inlet pipe 21 and the outlet pipe 23. The connection between the filter chamber 22 and the inlet pipe 21 and the connection between the outlet pipe 23 are smooth. The inlet pipe 21, the filter chamber 22 and the outlet pipe 23 are integrally formed. The filter sheet 221 is coaxially arranged with the filter chamber 22.

[0057] In this way, the filter chamber 22 can accommodate the filter 221, so that the gas entering the air inlet pipe 21 through the mouthpiece 1 is filtered by the filter 221 and then delivered to the lung function tester through the air outlet pipe 23, thereby improving the filtration effect.

[0058] See Figure 4 In some embodiments, the inner wall of the filter chamber 22 is provided with a clamping groove 222, the outer edge of the filter sheet 221 is clamped in the clamping groove 222, and the inner wall of the filter chamber 22 is provided with two sets of clamping ribs 223, which are respectively provided on both sides of the filter sheet 221 to limit the position of the filter sheet 221.

[0059] The clamping groove 222 extends circumferentially along the inner wall of the filter chamber 22, and two sets of clamping ribs 223 are symmetrically arranged on both sides of the filter sheet 221. The end faces of the two sets of clamping ribs 223 that are close to each other abut against both sides of the filter sheet 221. A set of clamping ribs 223 is provided in multiples, and multiple clamping ribs 223 in the same set are circumferentially arranged at equal intervals on one side of the filter sheet 221.

[0060] Thus, the filter element 221 is inserted into the clamping groove 222, which allows the filter element 221 to be more firmly set in the filter chamber 22. The clamping ribs 223 are respectively abutted against the two sides of the filter element 221. When the gas passes through the filter element 221 and flows through the filter chamber 22, the vibration of the filter element 221 can be reduced, so that the filter element 221 can effectively filter the gas and improve the filtration effect.

[0061] It is understandable that the two sets of clamping ribs 223 can also be staggered. The number and position of the clamping ribs 223 can be flexibly adjusted to limit the filter 221. No further details will be provided here.

[0062] See Figure 4 The present invention also provides a pulmonary function testing instrument, including an instrument body (not shown in the figure) and a filter, wherein the filter is connected to the instrument body, and the output end of the air outlet tube 23 is connected to the instrument body.

[0063] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A filter, characterized in that, include: A mouthpiece (1) is provided with an air inlet (11) at one end; The filter housing (2) includes an air inlet pipe (21) which is detachably connected to the end of the mouthpiece (1) away from the air outlet (11). Fastening mechanism (3), the fastening mechanism (3) includes a fastening protrusion (31), the fastening protrusion (31) is disposed on the mouthpiece (1), the air inlet pipe (21) is provided with a fastening groove (211) for the fastening protrusion (31) to slide, the fastening groove (211) includes a guide section (2111) and a locking section (2112), the guide section (2111) and the locking section (2112) are set at an angle; A sealing mechanism (4) includes a sealing ring (41) and a sealing edge (42). The sealing ring (41) is disposed on one of the mouthpiece (1) and the air inlet pipe (21), and the sealing edge (42) is disposed on the other of the mouthpiece (1) and the air inlet pipe (21). The sealing ring (41) and the sealing edge (42) may selectively abut against each other. The mouthpiece (1) has a locked state and an unlocked state. When the mouthpiece (1) is in the locked state, the fastening protrusion (31) is located in the locking section (2112), and the sealing ring (41) abuts against the sealing edge (42).

2. The filter according to claim 1, characterized in that, The sealing ring (41) is disposed on the inner wall of the air inlet pipe (21), and the sealing edge (42) is disposed at one end of the mouthpiece (1) facing the air inlet pipe (21).

3. The filter according to claim 1, characterized in that, The guide section (2111) extends along the axial direction of the intake pipe (21), and the locking section (2112) extends along the circumferential direction of the intake pipe (21).

4. The filter according to claim 1, characterized in that, The bottom surface of the locking section (2112) is flush with the end face of the sealing ring (41) facing the mouthpiece (1).

5. The filter according to claim 1, characterized in that, The fastening mechanism (3) also includes a safety protrusion (32), which is disposed in the locking section (2112). When the mouthpiece (1) is in the locked state, the fastening protrusion (31) abuts against the safety protrusion (32).

6. The filter according to any one of claims 1-5, characterized in that, At least two fastening protrusions (31) are provided. The fastening protrusions (31) are circumferentially spaced at one end of the mouthpiece (1) facing the air inlet pipe (21). The fastening protrusions (31) and the fastening grooves (211) are provided in a one-to-one correspondence.

7. The filter according to any one of claims 1-5, characterized in that, The sealing ring (41) is made of an elastic material.

8. The filter according to any one of claims 1-5, characterized in that, The filter housing (2) further includes a filter chamber (22) and an air outlet pipe (23). One end of the filter chamber (22) is connected to the end of the air inlet pipe (21) away from the mouthpiece (1), and the other end is connected to the air outlet pipe (23). The air inlet pipe (21), the filter chamber (22), and the air outlet pipe (23) are coaxially arranged. A filter element (221) is provided inside the filter chamber (22).

9. The filter according to claim 8, characterized in that, The filter chamber (22) has a groove (222) on its inner wall, and the outer edge of the filter sheet (221) is engaged in the groove (222); and / or, the filter chamber (22) has two sets of clamping ribs (223) on its inner wall, and the two sets of clamping ribs (223) are respectively disposed on both sides of the filter sheet (221) to limit the position of the filter sheet (221).

10. A pulmonary function testing instrument, characterized in that, It includes an inspection instrument body and a filter as described in any one of claims 1-9, wherein the filter is connected to the inspection instrument body.

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