Sputum enrichment cup

Abstract

The utility model relates to the field of medical detection instruments, and discloses a sputum enrichment cup. The sputum enrichment cup comprises a cup body and a piston assembly; the cup body is provided with a liquefaction cavity and a piston cavity which are arranged oppositely, and the liquefaction cavity and the piston cavity are communicated with each other and form a filtering opening. The piston assembly is inserted into the piston cavity and is in interference fit with the piston cavity, and in the initial state, a piston rubber head of the piston assembly abuts against the top wall of the piston cavity and blocks the filtering opening. The sputum enrichment cup disclosed by the utility model can integrate liquefaction treatment and enrichment treatment of a sputum sample, is simple in structure and more complete in function, does not need external equipment, is simpler and more convenient to operate, and improves the operation efficiency.

Description

Technical Field

[0001] The present application relates to the field of medical testing instruments, and in particular, to a sputum enrichment cup. Background Art

[0002] During clinical treatment and disease screening, the detection of some pathogens usually requires the extraction of sputum from patients for testing. Sputum collection usually requires patients to cough deeply to produce sputum. Medical staff will provide a container to the patient, and the patient coughs the sputum directly into the container. Sometimes, if the patient cannot produce enough sputum, medical staff may use endotracheal intubation or gastric tube to extract sputum. After the sputum is extracted, the sputum is liquefied, and then the liquefied sputum needs to be enriched, and finally the enriched specimen is tested.

[0003] Among the existing patents, the patent number is 201910932553.3, the publication date is March 30, 2021, and the patent name is a double-layer membrane filter cup and its application. The double-layer membrane filter cup includes a filter cup body, an annular structure and a connecting seat connected in sequence from top to bottom. The filter cup body and the annular structure are detachably connected and a large-pore filter membrane is arranged between them. The annular structure and the connecting seat are detachably connected and a small-pore filter membrane is arranged between them. When in use, it is necessary to first mix the sputum sample with the sputum alkaline digestive fluid to obtain the digested sputum sample, then assemble the double-layer membrane filter cup and put the hollow cylindrical structure at the bottom of the double-layer membrane filter cup into the negative pressure filtration device, and then add the digested sputum sample into the filter cup body, start negative pressure filtration, and finally take out the small-pore filter membrane for detection.

[0004] It can be seen from this that in the above-mentioned double-layer membrane filter cup and its application, sputum liquefaction treatment and sputum filtration need to be carried out separately, and negative pressure filtration needs to be completed with the help of external equipment, while the double-layer membrane filter cup only has the function of filtering sputum samples, with a single function and a complex structure. Utility Model Content

[0005] The purpose of the present application is to provide a sputum enrichment cup to solve the problem of single function and complex structure of the double-layer membrane filter cup provided in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides a sputum enrichment cup, including a cup body and a piston assembly;

[0007] The cup body is provided with a liquefaction chamber and a piston chamber which are arranged in opposite positions, and the liquefaction chamber and the piston chamber are connected to each other to form a filter port;

[0008] The piston assembly is inserted into the piston cavity and is interference-fitted with the piston cavity. In an initial state, the piston rubber head of the piston assembly abuts against the top wall of the piston cavity and forms a blockage for the filter port.

[0009] As a further improvement of the above technical solution:

[0010] In a possible implementation, the piston assembly includes a piston rod and a piston rubber head disposed at the end of the piston rod, the piston rubber head is interference fit with the piston cavity, and one end of the piston rod away from the piston rubber head extends outside the cup body.

[0011] In a possible implementation manner, the head of the piston rubber head is in a frustum shape or a trapezoidal shape.

[0012] In a possible implementation manner, a tapered section for guiding flow is provided between the liquefaction chamber and the filter port.

[0013] In a possible implementation, in a direction from the cavity opening of the liquefaction cavity to the filter opening, the inner cavity width of the tapered section gradually decreases to match the width of the filter opening.

[0014] In a possible implementation manner, the inner cavity of the tapered section is in a frustum shape.

[0015] In a possible implementation manner, a gradually expanding section is provided between the piston cavity and the filter port.

[0016] In a possible implementation, in a direction from the filter port to the cavity opening of the piston cavity, the inner cavity width of the gradually expanding section gradually expands to match the inner cavity width of the piston cavity.

[0017] In a possible implementation manner, the sputum enrichment cup further includes a cup cover, which is detachably disposed on the cup body and is used to block the cavity opening of the liquefaction cavity.

[0018] In a possible implementation, an enrichment membrane assembly is provided on a side of the cup cover close to the filter port.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The sputum enrichment cup provided by the present application is provided with a liquefaction chamber and a piston chamber directly on the cup body, and the liquefaction chamber and the piston chamber are interconnected and form a filter port. When in use, the piston assembly is located in the initial position, at which time the piston rubber head of the piston assembly abuts against the top wall of the piston chamber and forms a blockage to the filter port, and then the enrichment membrane assembly covers the filter port. Then the sputum sample and the sputum liquefied liquid are injected into the liquefaction chamber. Since the piston rubber head blocks the filter port, it can be ensured that the sputum sample is liquefied in the liquefaction chamber. After liquefaction is completed, the piston rubber head of the piston assembly is driven to perform piston movement relative to the piston chamber, so that the liquefied liquid in the liquefaction chamber is drawn into the piston chamber through the enrichment membrane assembly, thereby completing the enrichment of the sputum sample. In this way, the sputum enrichment cup provided by the present application integrates the liquefaction treatment and enrichment treatment of the sputum sample, has a simple structure, a more complete function, and no need to rely on external equipment, the operation is simpler, and the operation efficiency is improved.

[0021] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0023] Figure 1 A schematic diagram of an exploded view of a sputum enrichment cup without a cup cover provided in an embodiment of the present application is shown;

[0024] Figure 2 A cross-sectional view of a cup body in a sputum enrichment cup provided in an embodiment of the present application is shown;

[0025] Figure 3 A schematic diagram of the three-dimensional structure of a cup cover in a sputum enrichment cup provided in an embodiment of the present application is shown;

[0026] Figure 4 Shows Figure 3 A schematic diagram of the local structure of the connection between the cup cover and the enrichment membrane assembly in the sputum enrichment cup shown;

[0027] Figure 5 A front view of a sputum enrichment cup provided with a cup cover provided in an embodiment of the present application is shown;

[0028] Figure 6 A schematic diagram of the three-dimensional structure of another cup cover in the sputum enrichment cup provided in an embodiment of the present application is shown;

[0029] Figure 7A cross-sectional view of a sputum enrichment cup provided in an embodiment of the present application with a cup cover installed is shown.

[0030] Description of reference numerals:

[0031] 100, cup body; 110, liquefaction chamber; 111, gradually contracting section; 120, filter port; 130, convex teeth; 140, external thread; 150, piston chamber; 151, gradually expanding section;

[0032] 200, cup cover; 210, boss body; 211, liquid storage chamber; 220, internal thread; 230, connector; 240, sealing membrane;

[0033] 300, enrichment membrane assembly; 301, notch; 310, membrane frame; 311, hollow hole area; 312, vertical pole; 320, enrichment filter membrane;

[0034] 400, piston assembly; 410, piston rod; 420, piston rubber head. DETAILED DESCRIPTION

[0035] The specific implementation of the embodiment of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present application, and is not used to limit the embodiment of the present application.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0037] In the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0041] Embodiment 1

[0042] See also Figure 1 and Figure 2 , this embodiment provides a sputum enrichment cup for liquefying and enriching sputum.

[0043] The sputum enrichment cup provided in this embodiment includes a cup body 100 and a piston assembly 400. The cup body 100 is provided with a liquefaction chamber 110 and a piston chamber 150 arranged in a counterposition, and the liquefaction chamber 110 and the piston chamber 150 are interconnected to form a filter port 120. The filter port 120 is covered by an enrichment membrane assembly 300 to facilitate enrichment operations.

[0044] In this embodiment, the cup body 100 is a columnar structure, such as a prism or a cylinder. The liquefaction chamber 110 and the piston chamber 150 are respectively located at the two ends of the cup body 100, and the liquefaction chamber 110 and the piston chamber 150 are connected to the outside. And it can be understood that the liquefaction chamber 110 and the piston chamber 150 share the filter port 120, so that the filter port 120 is both the outlet of the liquefaction chamber 110 and the inlet of the piston chamber 150. Thereby, the axial size of the cup body 100 can be reduced, making the overall structure of the entire sputum enrichment cup more compact.

[0045] Please also read Figure 7 , further, the piston assembly 400 is inserted into the piston cavity 150 and has an interference fit with the piston cavity 150. Specifically, one end of the piston assembly 400 is located in the piston cavity 150, and the other end extends outside the cup body 100. In the initial state, the piston assembly 400 does not move relative to the piston cavity 150, so that the piston rubber head 420 of the piston assembly 400 abuts against the top wall of the piston cavity 150 and forms a blockage for the filter port 120. During the enrichment operation, the enrichment membrane assembly 300 is detachably arranged at the bottom of the liquefaction chamber 110 and covers the filter port 120.

[0046] It can be understood that when in use, the piston assembly 400 is first placed in the initial position so that the piston rubber head 420 of the piston assembly 400 abuts against the top wall of the piston cavity 150 and forms a blockage for the filter port 120, and then the enrichment membrane assembly 300 covers the filter port 120. Then, the sputum sample and the sputum liquefied liquid are injected into the liquefaction cavity 110. Since the piston rubber head 420 blocks the filter port 120, it can ensure that the sputum sample is liquefied in the liquefaction cavity 110 (the liquefaction of the sputum sample can be accelerated by stirring and vibration). After the liquefaction is completed, the piston rubber head 420 of the piston assembly 400 is driven to perform piston movement relative to the piston cavity 150, so that the liquefied liquid in the liquefaction cavity 110 is completely drawn into the piston cavity 150 through the enrichment membrane assembly 300, thereby completing the enrichment of the sputum sample, and finally the enrichment membrane assembly 300 is taken out to enter the next process. Of course, the enrichment membrane assembly 300 may be installed to cover the filter port 120 after the liquefaction is completed and before the suction.

[0047] Compared with the prior art, the sputum enrichment cup provided in this embodiment integrates the liquefaction process and the enrichment process of the sputum sample, and no external equipment is required, so the operation is simpler and the operation efficiency is improved.

[0048] Furthermore, the cup body 100 is designed as an integral structure, and integrates the liquefaction chamber 110 and the piston chamber 150 , which is simpler in structure, saves the assembly process between the two chambers, and greatly improves the operating efficiency.

[0049] Optionally, the inner cavity shapes of the liquefaction cavity 110 and the piston cavity 150 are cylindrical or regular quadrangular prisms.

[0050] In order to more clearly describe the technical solution of the present application, this embodiment describes the various structural components in the sputum enrichment cup, as follows:

[0051] See also Figure 1 , Figure 2 and Figure 7 The piston assembly 400 includes a piston rod 410 and a piston rubber head 420 disposed on the piston rod 410. The piston rubber head 420 is interference-fitted with the piston cavity 150. One end of the piston rod 410 away from the piston rubber head 420 extends outside the cup body 100, so as to apply a pulling force or a pushing force on the piston rod 410. It should be noted that the pulling force or the pushing force can be applied by an external device or manually.

[0052] In the initial state, the piston rod 410 is pushed to the minimum stroke, at which time the head of the piston rubber head 420 abuts against the top wall of the piston chamber 150, thereby forming an extrusion seal on the liquid outlet side of the filter port 120, so as to block the filter port 120 and prevent the liquid in the liquefaction chamber 110 from directly entering the piston chamber 150. During suction, the piston rod 410 is pulled to drive the rubber head to move away from the filter port 120, at which time a negative pressure is formed in the liquefaction chamber 110, and when all the liquid in the liquefaction chamber 110 is sucked into the piston chamber 150 through the enrichment filter membrane 320, the sputum is enriched.

[0053] It should be noted that after the sputum is enriched, the enrichment membrane assembly 300 can be taken out and then subjected to the next step of processing, such as placing the enrichment membrane assembly 300 in a cell preservation solution for the next step of processing.

[0054] In some embodiments, a gradually expanding section 151 is formed between the piston cavity 150 and the filter port 120, and the piston rubber head 420 has a structure adapted to the gradually expanding section 151, that is, the head of the piston rubber head 420 is in a frustum shape. This can reduce the movement resistance of the piston rubber head 420 in the piston cavity 150, making it easier to install and push the piston rubber head 420; moreover, in the initial state, the piston rubber head 420 has a better fit with the piston cavity 150, improving the sealing performance, thereby preventing the liquid in the liquefied cavity 110 from directly entering the piston cavity 150.

[0055] Furthermore, in the direction from the filter port 120 to the port of the piston cavity 150 , the inner cavity width of the gradually expanding section 151 gradually expands to match the inner cavity width of the piston cavity 150 .

[0056] Optionally, the shape of the gradually expanding section 151 is a frustum, a trapezoid or a shape similar to a trumpet.

[0057] In some embodiments, a tapered section 111 for diversion is provided between the liquefaction chamber 110 and the filter port 120 to achieve a transition from the diameter of the liquefaction chamber 110 to the diameter of the filter port 120, thereby guiding and converging the liquid to the filter port 120. Subsequently, through the suction action of the piston assembly 400, all the liquid can pass smoothly through the enrichment filter membrane 320 located at the filter port 120, thereby preventing residual liquid in the liquefaction chamber 110.

[0058] Furthermore, in the direction from the cavity opening of the liquefaction cavity 110 to the filter opening 120 , the inner cavity width of the tapered section 111 is gradually reduced to match the width of the filter opening 120 .

[0059] Optionally, the tapered section 111 is in a frustum shape, a trapezoidal shape, or a shape similar to a trumpet mouth.

[0060] The enrichment membrane assembly 300 includes a membrane frame 310 and an enrichment filter membrane 320 covering the membrane frame 310. The overall shape of the membrane frame 310 is adapted to the shape of the filter port 120, and the membrane frame 310 is provided with a plurality of hollow hole areas 311. The enrichment filter membrane 320 is arranged on the membrane frame 310 and covers all the hollow hole areas 311.

[0061] It can be understood that the provision of multiple hollow hole areas 311 can form a supporting skeleton between two adjacent hollow hole areas 311 to better support the enrichment filter membrane 320, and the hollow hole area 311 can increase the filtration area of ​​the enrichment filter membrane 320, so that the liquid has better permeability during filtration.

[0062] In some embodiments, the enrichment filter membrane 320 is bonded or heat-welded to the membrane frame 310 .

[0063] Embodiment 2

[0064] See also Figure 3 , Figure 4 and Figure 5 This embodiment provides a sputum enrichment cup. This embodiment is an improvement made on the technical basis of the above embodiment 1. Compared with the above embodiment 1, the difference is:

[0065] In this embodiment, the sputum enrichment cup also includes a cup cover 200, which is detachably disposed on the cup body 100 and is used to block the opening of the liquefaction chamber 110 to prevent the liquid in the liquefaction chamber 110 from splashing out of the opening of the liquefaction chamber 110 during operation.

[0066] In some embodiments, the cup cover 200 is buckled or snap-fitted to the cup body 100 .

[0067] In this embodiment, the cup cover 200 and the cup body 100 are matched with a thread pair, so that the cup cover 200 can rotate relative to the cup body 100 and move in the direction of the rotation axis. Specifically, the inner peripheral wall of the cup cover 200 is provided with an internal thread 220, and the outer peripheral wall of the cup body 100 is provided with an external thread 140 matched with the internal thread 220.

[0068] Furthermore, in this embodiment, a connector 230 is provided on one side of the cup cover 200 close to the filter port 120 , and the connector 230 is connected to the enrichment membrane assembly 300 .

[0069] In some embodiments, the connector 230 is detachably connected to the enrichment membrane assembly 300, for example, by snap-fitting, interference-fitting, or threaded connection, so as to facilitate installation and disassembly of the enrichment membrane assembly 300 and reduce the difficulty of disassembly.

[0070] In other embodiments, the connector 230 and the membrane frame 310 in the enrichment membrane assembly 300 may be formed as an integral injection molding structure, and when the enrichment membrane assembly 300 needs to be removed, the connector 230 and the membrane frame 310 may be broken by a tool. Of course, a breakable notch 301 may also be provided between the membrane frame 310 and the connector 230, so that the enrichment membrane assembly 300 can be separated from the connector 230 by a tool or vibration.

[0071] In this embodiment, the connector 230 and the membrane frame 310 of the enrichment membrane assembly 300 are welded, and a breakable notch 301 is formed at the connection between the membrane frame 310 and the connector 230 to facilitate breaking and removing the enrichment membrane assembly 300 .

[0072] Specifically, the membrane frame 310 has a vertical rod 312 connected to the connector 230 on the cup cover 200. The vertical rod 312 and the connector 230 are connected by heat welding, and a notch 301 with stress concentration is formed at the connection. In this way, under a certain frequency of vibration, the notch 301 can be broken to achieve the separation of the enrichment membrane assembly 300 and the connector 230, without the need for external tools to contact the enrichment membrane assembly 300, which is safe and hygienic, and reduces external interference in subsequent detection.

[0073] It should be noted that by connecting the enrichment membrane assembly 300 to the cup cover 200, the enrichment membrane assembly 300 can be taken away when the cup cover 200 is removed, and there is no need to use tools to reach into the liquefaction chamber 110 to remove the enrichment membrane assembly 300. This simplifies the installation and disassembly process of the enrichment membrane assembly 300, improves detection efficiency, avoids secondary contamination, and ensures subsequent detection accuracy.

[0074] Please also read Figure 7 , the length of the internal thread 220 on the cup cover 200 is greater than the moving stroke of the enrichment membrane assembly 300 covering the filter port 120. In this way, when the cup cover 200 is twisted, the cup cover 200 can rotate relative to the cup body 100 and move along the axis of rotation. According to the tightening force of the cup cover 200, the moving stroke of the enrichment membrane assembly 300 is controlled to ensure that the enrichment membrane assembly 300 covers the filter port 120. Of course, a stop interval line (not shown) for the cup cover 200 to be twisted can be set on the outer circumference of the cup body 100 to avoid the problem of the cup cover 200 being twisted too much or not twisted into place.

[0075] It can be understood that since the length of the internal thread 220 is greater than the moving stroke of the enrichment membrane assembly 300 to cover the filter port 120, sufficient margin can be reserved for the enrichment membrane assembly 300 to cover the filter port 120, so that after the enrichment membrane assembly 300 completes covering the filter port 120, the sealing around the filter port 120 is ensured to prevent liquid from passing through the gap, thereby improving the enrichment effect.

[0076] See also Figure 6 and Figure 7 In some embodiments, a boss body 210 is provided on the cup cover 200, and a liquid storage cavity 211 for storing liquid is provided in the boss body 210. The opening of the liquid storage cavity 211 faces the cup body 100 and is sealed by a sealing film 240. In this way, the sputum sample and the liquefied liquid can be preliminarily encapsulated in the liquid storage cavity 211, so that the sputum sample can be preliminarily liquefied in the cup cover 200. When installing the cup cover 200, the sealing film 240 is punctured or scratched by the puncture structure so that the liquid in the liquid storage cavity 211 flows into the liquefaction cavity 110 for further liquefaction, thereby achieving the completion of liquid injection while installing the cup cover 200, reducing the time for liquid to contact with air, reducing the interference of external factors, and ensuring the accuracy of later detection.

[0077] Optionally, the puncture structure can be arranged on the inner wall of the liquefaction chamber 110, and the puncture structure is a convex tooth 130 with a blade portion. In this way, the rotation of the cup cover 200 itself can be used to make the sealing film 240 contact with the puncture structure and generate relative movement, thereby piercing the sealing film 240, which has a simple structure and high reliability.

[0078] It should be noted that the sputum enrichment cup needs to be disposed of centrally after use.

[0079] The above describes in detail the optional implementation methods of the embodiments of the present application in combination with the accompanying drawings. However, the embodiments of the present application are not limited to the specific details in the above implementation methods. Within the technical concept of the embodiments of the present application, various simple modifications can be made to the technical scheme of the embodiments of the present application, and these simple modifications all belong to the protection scope of the embodiments of the present application.

[0080] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present application will not further describe various possible combinations.

[0081] In addition, the various implementation methods of the embodiments of the present application may be arbitrarily combined, and as long as they do not violate the ideas of the embodiments of the present application, they should also be regarded as the contents disclosed in the embodiments of the present application.

Claims

1. A sputum enrichment cup, characterized in that: It comprises a cup body (100) and a piston assembly (400); The cup body (100) is provided with a liquefaction chamber (110) and a piston chamber (150) arranged in opposite positions, and the liquefaction chamber (110) and the piston chamber (150) are communicated with each other to form a filter port (120); The piston assembly (400) is inserted into the piston cavity (150) and is interference fit with the piston cavity (150). In an initial state, the piston rubber head (420) of the piston assembly (400) abuts against the top wall of the piston cavity (150) and forms a blockage for the filter port (120).

2. The sputum enrichment cup according to claim 1, characterized in that: The piston assembly (400) comprises a piston rod (410) and a piston rubber head (420) arranged at the end of the piston rod (410); the piston rubber head (420) is interference fit with the piston cavity (150); and one end of the piston rod (410) away from the piston rubber head (420) extends outside the cup body (100).

3. The sputum enrichment cup according to claim 2, characterized in that: The head of the piston rubber head (420) is in the shape of a frustum.

4. The sputum enrichment cup according to claim 1, characterized in that: A tapered section (111) for guiding flow is provided between the liquefaction chamber (110) and the filter port (120).

5. The sputum enrichment cup according to claim 4, characterized in that: In the direction from the cavity opening of the liquefaction cavity (110) to the filter opening (120), the inner cavity width of the tapered section (111) gradually decreases to match the width of the filter opening (120).

6. The sputum enrichment cup according to claim 5, characterized in that: The inner cavity shape of the tapered section (111) is a frustum shape or a trapezoidal shape.

7. The sputum enrichment cup according to claim 1, characterized in that: A gradually expanding section (151) is provided between the piston chamber (150) and the filter port (120).

8. The sputum enrichment cup according to claim 7, characterized in that: In the direction from the filter port (120) to the port of the piston cavity (150), the inner cavity width of the gradually expanding section (151) gradually expands to match the inner cavity width of the piston cavity (150).

9. The sputum enrichment cup according to any one of claims 1 to 8, characterized in that: The sputum enrichment cup further comprises a cup cover (200), and the cup cover (200) is detachably disposed on the cup body (100) and is used to seal the cavity opening of the liquefaction cavity (110).

10. The sputum enrichment cup according to claim 9, characterized in that: An enrichment membrane assembly (300) is provided on one side of the cup cover (200) close to the filter port (120).

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