Quantitative collection mechanism and excrement sample sampler

Abstract

The utility model discloses a quantitative collection mechanism and an excrement sample sampler, belongs to the technical field of sampling devices, and solves the problems that an existing sampling device is inaccurate in quantification and poor in sealing performance, and diluent needs to be added for the second time. The quantitative collection mechanism comprises a rod body, a clamping arm, a sleeve and a pressure spring, quantitative collection spoons are arranged at the bottom end of the clamping arm, and the collection spoons can be closed to form a closed collection cavity with constant volume by controlling the sleeve, so that accurate quantitative sampling is realized; the excrement sample sampler is formed by detachably connecting a pipe body and the quantitative collection mechanism, the pipe body is provided with a partition plate to form a pre-packaging dilution bin, a puncturable sealing film is arranged at the position of the partition plate, the device is provided with a multi-stage sealing structure with internal and external dual sealing and threaded sealing, and a collection spoon can puncture the sealing film to be mixed with diluent. The device is simple and convenient to operate, realizes integration of collection, sealing and dilution, is reliable in sealing and accurate in quantification, reduces sample pollution and leakage risks, and improves detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of sampling device technology, specifically to a quantitative collection mechanism and a stool sampler. Background Technology

[0002] Stool sampling devices are commonly used medical instruments in clinical practice, covering diagnosis and monitoring across multiple departments and all age groups throughout the hospital. Taking palliative care as an example, gastrointestinal care for end-stage patients is a key aspect of clinical care. These patients often experience various gastrointestinal discomfort symptoms due to disease progression, drug side effects, weakened immunity, or prolonged bed rest and disability. As a non-invasive monitoring method, stool sampling can provide a scientific basis for gastrointestinal care decisions by detecting stool characteristics, flora, occult blood, pathogens, and digestion and absorption-related indicators. Because of this objective monitoring function, it can effectively avoid the problem of symptom exacerbation caused by relying solely on experience-based judgments, reduce unnecessary physical suffering for patients, and make care more targeted and safer.

[0003] Currently, most commonly used stool sample collection devices in clinical practice adopt a "cup + spoon" structure, such as... Figure 1 As shown, during sampling, a sampling spoon is used to scoop up feces and put it into the cup. The cup lid with the sampling spoon is then threaded onto the cup body. After the sampler returns the sample to the testing personnel, the testing personnel need to reopen the cup lid and add diluent to the cup to dilute the sample.

[0004] The above-mentioned stool sample collection device has the following problems:

[0005] 1. Lack of standardized quantitative design, sampling volume relies on subjective human judgment, making it difficult to accurately control the sampling volume. Insufficient sampling volume will result in the sample size not meeting the testing requirements.

[0006] 2. Relying solely on a single-layer threaded seal on the cap may lead to sample leakage during transportation and storage if the sample is bumped or not fully tightened. This increases biosafety risks and may also result in sample contamination or deterioration.

[0007] 3. The diluent compartment is not integrated with a pre-packaged container, requiring manual addition of diluent after opening the cap twice. This is cumbersome and increases the probability of sample contamination, affecting the standardization of preprocessing.

[0008] In conclusion, there is still a need for further improvement of existing stool sample collection devices. Utility Model Content

[0009] This utility model aims to solve at least one technical problem existing in the prior art, and to this end, it proposes a quantitative collection mechanism and a stool sampler.

[0010] In a first aspect, this utility model proposes a quantitative collection mechanism, including a rod body, a handheld part connected to the top end of the rod body, and a collection component provided at the bottom end, the collection component including:

[0011] A pair of flexible clamping arms, the top of which is fixedly connected to the bottom of the rod, and the two clamping arms can move closer or further apart; a collection spoon is fixedly provided at the bottom of each clamping arm; the two collection spoons can be aligned with the movement of the clamping arms; the receiving cavity of the collection spoon is a groove structure with a preset quantitative volume, and the two collection spoons are aligned to form a closed quantitative collection cavity with a constant volume.

[0012] A sleeve is movably fitted on the outside of the clamping arm and can move up and down relative to the clamping arm. A compression spring is provided above the sleeve, which is fitted on the rod. The bottom end of the compression spring is connected to the sleeve, and the top end is connected to the outer wall of the rod.

[0013] The outer wall of the sleeve is provided with a force-applying part. When the force-applying part is operated to drive the sleeve to move up and down, the sleeve can drive the two clamping arms to move relative to each other, thereby driving the two collection spoons to separate or align.

[0014] As an alternative, the force-applying part includes a wing seat and a wing plate, the top of the sleeve is fixedly connected to the wing seat, two of the wing plates are fixedly connected to the wing seat, and the bottom end of the compression spring is connected to the wing seat.

[0015] As an alternative, a flange is fixedly provided on the outer wall of the rod, and the top end of the compression spring is connected to the flange.

[0016] As an optional solution, a V-shaped spring is also connected between the two clamping arms.

[0017] As an alternative, the rod and the handheld part are rotatably connected.

[0018] Secondly, this utility model proposes a stool sampler, including a tube body and the aforementioned quantitative collection mechanism, wherein the tube body can be detachably connected to the aforementioned quantitative collection mechanism; wherein the handheld part is a sealing cap, the sealing cap can be threadedly connected to the tube body, and both the rod body and the collection component can be built into the tube body.

[0019] As an alternative, a partition is fixed to the inner wall of the middle part of the tube, and a central hole is provided in the middle part of the partition, which allows the sleeve to pass through freely; a puncturable sealing membrane is provided at the central hole; a dilution chamber is formed between the partition and the bottom of the inner tube, and a diluent is pre-sealed in the dilution chamber.

[0020] As an optional solution, a sealing plug is fixed to the outer wall of the sleeve. The sealing plug is pressed against the partition plate under the elastic force of the compression spring, sealing the outer periphery of the central hole to form an external sealing structure. A sealing ring is fixedly sleeved on the rod body. The side of the sealing ring is slidably connected to the inner wall of the sleeve to form an internal sealing structure. The bottom end of the collection spoon can pierce the sealing membrane and extend into the dilution chamber.

[0021] As an alternative, the bottom outer wall of the collection spoon is provided with spikes.

[0022] As an alternative, the sealing film is an aluminum-plastic film or a polymer film.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The quantitative collection mechanism adopted in this utility model has a simple structure and is easy to operate. The separation and alignment of the collection spoon are achieved by the sliding of the sleeve. After the collection spoon is aligned, a closed and constant volume quantitative collection cavity is formed, which can realize constant volume quantitative sampling of the specimen. The sampling volume is no longer affected by the subjective influence of manual operation, which can effectively ensure that the sample volume meets the clinical testing requirements and improve the accuracy and reliability of the test results.

[0025] 2. The stool sampler described in this utility model adopts a double sealing structure, with the inner and outer layers serving as the first seal and the threaded seal between the sealing cap and the tube body serving as the second seal. The whole structure forms a multi-level sealing structure, which can achieve multi-level sealing protection during transportation and storage, effectively avoiding sample leakage caused by bumps or poor sealing, reducing the risk of biological contamination, and preventing the sample from being contaminated or deteriorated by the outside world.

[0026] 3. The stool sampler described in this utility model pre-packages the diluent in an independent dilution chamber. After sampling, there is no need to open the lid again to add diluent. The sample and diluent can be mixed simply by puncturing the sealing film. The operation process is simpler, which can reduce the probability of sample contamination and realize the standardization and integration of sample pretreatment. Attached Figure Description

[0027] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0028] Figure 1 This is a schematic diagram of the structure of a fecal specimen sampling device in the prior art.

[0029] Figure 2 This is a three-dimensional view of the quantitative collection mechanism proposed in this utility model (collection spoon in the closed state).

[0030] Figure 3This is a three-dimensional view of the quantitative collection mechanism proposed in this utility model (collection spoon separated).

[0031] Figure 4 This is an exploded structural diagram of the quantitative collection mechanism proposed in this utility model.

[0032] Figure 5 This is a front view of the stool sampler (after the tube and quantitative collection mechanism are assembled).

[0033] Figure 6 This is a cross-sectional view of a stool sampler (after the tube and quantitative collection mechanism are assembled).

[0034] Figure 7 This is a cross-sectional view of the tube in the stool sampler.

[0035] Figure 8 This is a structural diagram of a stool sampler packaged as a complete set.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Tube body; 2. Sealing cap; 3. Gasket; 4. Rod body; 5. Flange; 6. Compression spring; 7. Wing plate; 8. Sealing plug; 9. Sleeve; 10. Sealing ring; 11. Clamping arm; 111. Guide slope; 12. Collection spoon; 121. Spike; 13. Partition; 14. Aseptic packaging bag; 15. V-shaped spring; 16. Center hole; 17. Dilution chamber. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0039] like Figure 2 — Figure 4 As shown, this embodiment proposes a quantitative collection mechanism, mainly used to achieve standardized and quantitative specimen collection. It includes a rod 4, which serves as the main supporting component of the entire mechanism, supporting the various functional components and transmitting force. A handheld part is connected to the top of the rod 4, allowing the operator to grip and apply force for easy sampling. The shape of the handheld part can be flexibly designed according to actual usage requirements, adopting either a cylindrical structure or a round cap-shaped structure. A collection component is located at the bottom of the rod 4, acting on the specimen and serving as the core component for quantitative collection.

[0040] The specific structure of the collection component includes a pair of elastic clamping arms 11 and a sleeve 9. The pair of clamping arms 11 are symmetrically arranged on both sides of the bottom end of the rod 4. The top end of the clamping arms 11 is fixedly connected to the bottom end of the rod 4 and can move synchronously with the rod 4. The two clamping arms 11 have elastic deformation capabilities and can move closer or further apart under the action of external force, thereby realizing the opening and closing action. A collection spoon 12 is fixedly provided at the bottom end of each clamping arm 11. The collection spoon 12 is a structure that directly contacts the specimen. It has a receiving cavity inside. The receiving cavity of the collection spoon 12 is a groove structure with a preset quantitative volume. The volume of the groove is preset according to clinical testing standards. The two collection spoons 12 can be aligned with the movement of the clamping arms 11. When the two collection spoons 12 are aligned, they form a closed quantitative collection cavity with a constant volume. The quantitative collection cavity can accurately accommodate a fixed volume of specimen to achieve quantitative and standardized collection of specimen.

[0041] The sleeve 9 is movably sleeved on the clamping arm 11 and can move up and down relative to it. Specifically, the inner wall of the sleeve 9 is adapted to the outer wall of the clamping arm 11 and can move up and down relative to the clamping arm 11 along the axial direction of the rod 4. A compression spring 6 is provided above the sleeve 9. The compression spring 6 is sleeved on the rod 4. The bottom end of the compression spring 6 is connected to the sleeve 9 and the top end is connected to the outer wall of the rod 4. The compression spring 6 can provide a downward elastic restoring force for the sleeve 9.

[0042] The outer wall of the sleeve 9 is provided with a force-applying part. When the force-applying part is operated to drive the sleeve 9 to move up and down, the sleeve 9 can drive the two clamping arms 11 to move relative to each other, thereby driving the two collection spoons 12 to separate or align.

[0043] Working principle: The quantitative collection mechanism mainly uses the squeezing or releasing action of the inner wall of the sleeve 9 on the clamping arm 11 to drive the two clamping arms 11 to move in relative opening and closing motion, thereby driving the two collection spoons 12 to separate or join, and complete the whole set of sampling actions such as scooping, wrapping and sealing of the specimen.

[0044] In some embodiments, the force-applying part may be an L-shaped rod or two symmetrically arranged L-shaped rods, which are fixedly connected to the outer wall of the sleeve 9 to facilitate operation by the operator's fingers.

[0045] In some embodiments, the force-applying part may also have the following structure: the force-applying part includes a wing seat and wing plates 7, the top of the sleeve 9 is fixedly connected to the wing seat, and two wing plates 7 are fixedly connected to the wing seat. The wing plates 7 extend radially outward along the sleeve 9, and the bottom end of the compression spring 6 is connected to the wing seat. By setting the wing plates 7, the force-applying area of ​​the operator can be increased, making it easier for the operator to manipulate the sleeve 9 upward with their fingers, effectively improving the convenience and comfort of the sampling operation.

[0046] In some embodiments, a flange 5 is fixedly provided on the outer wall of the rod 4, and the top end of the compression spring 6 is connected to the flange 5. The flange 5 provides a stable support point for the compression spring 6, ensuring that the compression spring 6 does not undergo radial displacement during extension and retraction, thereby achieving stable positioning and reliable elastic support for the compression spring 6.

[0047] In some embodiments, a V-shaped spring sheet 15 is also connected between the two clamping arms 11. The V-shaped spring sheet is made of a metal or polymer material with good elasticity. Its two ends are respectively connected to the inner sidewalls of the two clamping arms 11. The V-shaped spring sheet provides the two clamping arms 11 with an elastic restoring force to open outward, so that the clamping arms 11 can automatically open when there is no squeezing constraint of the sleeve 9, ensuring that the collection spoon 12 can be stably in the open state when there is no external force constraint, which facilitates the smooth progress of subsequent sampling operations.

[0048] In some embodiments, the side wall of the clamping arm 11 is provided with a guide slope 111. The guide slope 111 extends along the length direction of the clamping arm 11 and is adapted to the shape of the inner wall of the sleeve 9. When the sleeve 9 moves up and down along the axial direction of the rod 4, it can slide smoothly along the guide slope 111. Through the guiding effect of the guide slope 111, the sleeve 9 and the clamping arm 11 are more smoothly matched and the pressure is transmitted more evenly, effectively avoiding jamming of the clamping arm 11 during the opening and closing process, and further improving the stability and smoothness of the opening and closing action of the collection spoon 12.

[0049] In some embodiments, the rod body 4 and the handheld part are rotatably connected or threadedly connected. The rotatable connection allows the handheld part and the rod body 4 to rotate relative to each other. The threaded connection enables the rod body 4 and the handheld part to be fastened and disassembled, which facilitates the individual processing, assembly, replacement and maintenance of each component. At the same time, it can be adapted to different structural forms of handheld parts according to usage requirements, thereby improving the versatility of the mechanism.

[0050] The quantitative sampling device described in this embodiment can not only be applied to stool sample collection in the medical field, but also, with its advantages of precise quantification, airtight and pollution-proof design, and convenient operation, it can be widely used for quantitative sampling operations in various non-medical scenarios such as environmental monitoring, food testing, scientific research experiments, agricultural planting, aquaculture, and environmental solid waste testing.

[0051] Taking stool sample collection as an example, based on the aforementioned quantitative collection methods, such as... Figure 5 - Figure 8 As shown in the figure, this embodiment also proposes a stool sampler for realizing integrated operation of sample collection, sealed storage and pre-dilution. The overall structure is compact and easy to operate.

[0052] The stool sampler includes a tube body 1 and the aforementioned quantitative collection mechanism. The tube body 1 is made of medical-grade transparent or semi-transparent polymer material, which facilitates observation of the specimen's condition and dilution within the tube. The tube body 1 can be detachably connected to the quantitative collection mechanism. The handle is a sealing cap 2, which can be threaded onto the tube body 1. A gasket 3 is provided between the tube body 1 and the sealing cap 2 to achieve a sealed plugging of the tube body 1. After sampling, the rod body 4 and the collection component of the quantitative collection mechanism can be housed within the tube body 1, preventing the collection component from being exposed and causing contamination. This also reduces the overall volume, facilitating transportation and storage.

[0053] A partition 13 is fixedly installed on the inner wall of the tube body 1. The partition 13 is made of medical-grade rigid material of the same material as the tube body 1 and is seamlessly fixed to the inner wall of the tube body 1, serving to separate the internal space of the tube body 1. The partition 13 has a central hole 16 in the middle, which allows the sleeve 9 to pass through freely. The diameter of the central hole 16 is adapted to the outer wall size of the sleeve 9, ensuring that the sleeve 9 can move up and down smoothly while avoiding excessive gaps. A puncturable sealing membrane is installed at the central hole 16. The sealing membrane can be an aluminum-plastic film or a polymer film, which can completely seal the central hole 16, achieving isolation and sealing of the upper and lower spaces of the partition 13. A dilution chamber 17 is formed between the partition 13 and the inner bottom of the tube body 1. The dilution chamber 17 is pre-packaged with diluent. The type and amount of diluent are pre-set according to conventional testing standards, eliminating the need for manual addition after sampling and achieving rapid pre-dilution of the sample.

[0054] A sealing plug 8 is fixedly installed on the outer wall of the sleeve 9. The sealing plug 8 is made of medical-grade flexible rubber or silicone material, which has good elasticity and sealing performance. Under the elastic force of the compression spring 6, the sealing plug 8 is pressed against the partition plate 13, sealing the outer periphery of the central hole 16 to form an external sealing structure, preventing the diluent in the dilution chamber 17 from leaking upwards, and at the same time preventing external contaminants from entering the dilution chamber 17. A sealing ring 10 is fixedly sleeved on the rod body 4. The sealing ring 10 is a corrosion-resistant and wear-resistant medical O-ring. The side of the sealing ring 10 is slidably connected to the inner wall of the sleeve 9 to form an internal sealing structure. This can effectively prevent the diluent in the dilution chamber 17 from leaking upwards through the gap between the sleeve 9 and the rod body 4. It works in conjunction with the external sealing structure to further improve the overall sealing performance.

[0055] The aforementioned outer and inner sealing structures form a double sealing structure, serving as the first layer of sealing; the threaded seal between the sealing cap 2 and the tube body 1 serves as the second layer of sealing, forming a multi-level sealing structure. This structure can achieve multi-level sealing protection during transportation and storage, effectively preventing sample leakage caused by bumps or inadequate sealing, reducing the risk of biological contamination, and preventing the sample from being contaminated or deteriorated by external factors.

[0056] The bottom of the collection spoon 12 can pierce the sealing film and extend into the dilution chamber 17. When the collection spoon 12 of the collection component moves downward, it can pierce the sealing film at the central hole 16 and extend into the dilution chamber 17, so that the quantitative sample in the collection spoon 12 and the diluent in the dilution chamber 17 are fully mixed, completing the pre-dilution operation of the sample without the need for a second opening operation.

[0057] As an alternative, the bottom outer wall of the collection spoon 12 is provided with spikes 121. The spikes 121 are made of medical-grade hard plastic or metal material. The spikes 121 are conical or multi-bladed. Their main function is to assist the collection spoon 12 in quickly and smoothly piercing the sealing membrane, reducing the difficulty for operators to apply force.

[0058] As can be seen, this sampler pre-packages the diluent in an independent dilution chamber 17, eliminating the need to open the chamber again to add diluent after sampling. The sample and diluent can be mixed simply by puncturing the sealing membrane, making the operation process simpler, reducing the probability of sample contamination, and achieving standardization and integration of sample pretreatment.

[0059] For ease of use, the stool sampler can be sold as a set, with the tube 1 and the quantitative collection mechanism integrated in a sterile packaging bag 14.

[0060] Stool sampler operation method:

[0061] 1. Preparation before sampling

[0062] Remove the stool sampler from the sterile packaging, check that all parts of the sampler are intact and undamaged, and confirm that the device is in normal working order.

[0063] 2. Control the collection spoon to open 12 times.

[0064] The operator presses the sealing cap 2 with one thumb, hooks the wing plate 7 with the index and middle fingers, and pulls the wing plate 7 upward to drive the sleeve 9 to slide upward along the rod 4. The sleeve 9 compresses the compression spring 6 and gradually releases the constraint on the clamping arm 11. The two clamping arms 11 automatically open outward under their own elasticity and / or the reset action of the V-shaped spring 15, thereby driving the two collection spoons 12 at the bottom to separate from each other, ready for sampling.

[0065] 3. Quantitative collection of stool samples

[0066] Insert the open collection spoon 12 into the stool sample to be collected, and release the fingers hooking the wing plate 7; the compression spring 6 returns to its original position under its own elastic force, pushing the sleeve 9 to move downward along the rod 4. The inner wall of the sleeve 9 squeezes the two clamping arms 11 on both sides to bring them closer to each other, causing the two collection spoons 12 to smoothly align and form a closed and constant volume quantitative collection cavity, thus completing the standardized quantitative sampling.

[0067] 4. Reinstallation of sampling components

[0068] Holding the sealing cap 2, align the sampling assembly with the upper opening of the tube body 1, and move the rod body 4 and the entire sampling assembly downwards; the spike 121 at the bottom of the sampling spoon 12 first pierces the sealing membrane at the center hole 16 of the partition 13, allowing the sampling spoon 12 to fully extend into the dilution chamber 17. Continue to push the sampling assembly downwards until the sealing plug 8 contacts the partition 13; continue to gently press the sealing cap 2, and the sealing plug 8 is pressed against the surface of the partition 13 under pressure, the compression spring 6 is further compressed, and the sampling spoon 12 continues to move downwards in sync until the sealing cap 2 and the tube body 1 are completely tightened and sealed.

[0069] 5. Submission for testing or inspection

[0070] Gently shake the sampler to thoroughly mix the sample with the diluent. The mixed sample can be used directly for clinical testing or sealed and sent for testing. No need to open the cap to add diluent throughout the process. The operation is now complete.

[0071] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.

Claims

1. A quantitative collection mechanism, comprising a rod (4), characterized in that, The top of the rod (4) is connected to a handheld part, and the bottom is provided with a data acquisition component, which includes: A pair of elastic clamping arms (11) are fixedly connected to the bottom end of the rod (4) at the top end, and the two clamping arms (11) can move closer or further apart; a collection spoon (12) is fixedly provided at the bottom end of each clamping arm (11); the two collection spoons (12) can be aligned with the clamping arms (11) as they move; the receiving cavity of the collection spoon (12) is a groove structure with a preset quantitative volume, and the two collection spoons (12) form a closed quantitative collection cavity with a constant volume after being aligned; The sleeve (9) is movably sleeved on the outside of the clamping arm (11) and can move up and down relative to the clamping arm (11). A compression spring (6) is provided above the sleeve (9). The compression spring (6) is sleeved on the rod (4). The bottom end of the compression spring (6) is connected to the sleeve (9), and the top end is connected to the outer wall of the rod (4). The outer wall of the sleeve (9) is provided with a force-applying part. When the force-applying part is manipulated to drive the sleeve (9) to move up and down, the sleeve (9) can drive the two clamping arms (11) to move relative to each other, thereby driving the two collection spoons (12) to separate or align.

2. The quantitative acquisition mechanism according to claim 1, characterized in that, The force-applying part includes a wing seat and a wing plate (7). The top of the sleeve (9) is fixedly connected to the wing seat, and two wing plates (7) are fixedly connected to the wing seat. The bottom end of the compression spring (6) is connected to the wing seat.

3. The quantitative acquisition mechanism according to claim 2, characterized in that, The outer wall of the rod (4) is fixedly provided with a flange (5), and the top end of the compression spring (6) is connected to the flange (5).

4. A quantitative acquisition mechanism according to claim 1, characterized in that, A V-shaped spring sheet (15) is also connected between the two clamping arms (11).

5. A quantitative acquisition mechanism according to claim 1, characterized in that, The rod (4) is rotatably connected to the handheld part.

6. A stool sampler, characterized in that, The device includes a tube body (1) and a quantitative collection mechanism as described in any one of claims 1-5, wherein the tube body (1) can be detachably connected to the quantitative collection mechanism; wherein the handheld part is a sealing cover (2), the sealing cover (2) can be threadedly connected to the tube body (1), and both the rod body (4) and the collection component can be built into the tube body (1).

7. A stool sampler according to claim 6, characterized in that, A partition (13) is fixedly provided on the inner wall of the middle part of the tube (1). The middle part of the partition (13) is provided with a central hole (16) through which the sleeve (9) can pass freely. A puncturable sealing film is provided at the central hole (16). A dilution chamber (17) is formed between the partition (13) and the inner bottom of the tube (1). The dilution chamber (17) is pre-sealed with diluent.

8. A stool sampler according to claim 7, characterized in that, The outer wall of the sleeve (9) is fixedly provided with a sealing plug (8). The sealing plug (8) is pressed against the partition plate (13) under the elastic force of the compression spring (6) to seal the outer periphery of the central hole (16) and form an outer sealing structure. The rod body (4) is fixedly provided with a sealing ring (10). The side of the sealing ring (10) is slidably connected to the inner wall of the sleeve (9) to form an inner sealing structure. The bottom end of the collection spoon (12) can pierce the sealing membrane and extend into the dilution chamber (17).

9. A stool sampler according to claim 8, characterized in that, The bottom outer wall of the collection spoon (12) is provided with spikes (121).

10. A stool sampler according to claim 7, characterized in that, The sealing film is an aluminum-plastic film or a polymer film.

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