Sampler and sampling device

Abstract

The utility model relates to a sampler and a sampling device. The sampler comprises a sampling tube, two cover bodies, and a filtering piece and a positioning sleeve which are accommodated in the sampling tube; the sampling tube comprises a first end and a second end which are oppositely arranged, and the two cover bodies respectively cover the first end and the second end of the sampling tube; a positioning protrusion is arranged on the inner wall of the sampling pipe in a protruding mode, the positioning sleeve is fixedly connected into the sampling pipe, and one axial end of the positioning sleeve abuts against the filtering piece to the positioning protrusion. The interior of the sampling tube is divided into a first cavity and a second cavity by the filtering piece and the positioning bulge, the first cavity and the second cavity are communicated through filtering pores in the filtering piece, and the positioning sleeve is positioned in the first cavity. According to the sampler and the sampling device disclosed by the utility model, the installation reliability of the filtering piece is relatively high, and the detection accuracy is relatively high.

Description

Technical Field

[0001] The utility model relates to the technical field of biomedical sample collection, in particular to a sampler and a sampling device. Background Art

[0002] Stool examination is one of the routine clinical examination items. Through this test, we can intuitively understand some pathological phenomena of the gastrointestinal tract, indirectly judge the functional status of the digestive tract, pancreas, liver and gallbladder, etc., and thus predict and detect the occurrence and development of certain gastrointestinal diseases. Therefore, stool examination has become a routine item for disease detection in many medical institutions.

[0003] In traditional stool testing, after obtaining the stool, the inspector usually opens the sampler and injects purified water or a special protective liquid into the sampler. This not only dilutes the stool but also prevents the degradation of markers in the stool. After mixing and centrifugation, the sampler is opened for sampling. In the currently common samplers, there may be a large amount of solid phase components in the mixture of stool and protective liquid. In order to filter them, a filter component is also installed in the sampler. However, the installation structure of the filter component is relatively complex, and the installation reliability is also poor. During the mixing and centrifugation process, it is very easy to fall off from the inner wall of the sampler, resulting in filtration failure. When the cover is opened for sampling, the solid phase components in the sample will affect the final test results, resulting in the accuracy of the test being affected. Utility Model Content

[0004] Based on this, it is necessary to provide a sampler and a sampling device with high installation reliability and high detection accuracy of the filter component.

[0005] A first aspect of an embodiment of the present application provides a sampler comprising a sampling tube, two covers, and a filter element and a positioning sleeve accommodated in the sampling tube;

[0006] The sampling tube includes a first end and a second end that are arranged opposite to each other, and two cover bodies are respectively covered on the first end and the second end of the sampling tube; a positioning protrusion is convexly provided on the inner wall of the sampling tube, and the positioning sleeve is fixedly connected to the sampling tube, and one axial end of the positioning sleeve presses the filter element against the positioning protrusion; the filter element and the positioning protrusion separate the interior of the sampling tube into a first cavity and a second cavity, and the first cavity and the second cavity are connected through the filter pores on the filter element, and the positioning sleeve is located in the first cavity.

[0007] In one embodiment, the outer wall of the positioning sleeve is fitted to the inner wall of the sampling tube, and the inner wall of the positioning sleeve, the filter element and the positioning boss together define a sample placement area.

[0008] In one embodiment, part of the wall of the positioning sleeve is formed as a thick-walled portion with locally increased thickness.

[0009] In one embodiment, a scraping portion is further provided on the inner wall of the positioning sleeve, and the scraping portion is located between the two axial ends of the positioning sleeve.

[0010] In one embodiment, the cover includes a bottom wall and a side wall connected to an outer edge of the bottom wall;

[0011] An annular sealing wall is provided on the bottom wall, and the sealing wall and the side wall are arranged at intervals along the radial direction of the sealing wall to define an accommodating space. When the cover body is covered on the first end or the second end, the portion of the tube section on the sampling tube close to the first end or the second end extends into the accommodating space, and the outer peripheral surface of the sealing wall abuts against the inner wall of the tube section.

[0012] In one embodiment, the thickness of the sealing wall first increases and then decreases in a direction away from the bottom wall, so as to form an annular abutting protrusion on the outer wall of the sealing wall.

[0013] In one embodiment, the positioning protrusion is configured as an annular boss, and the annular boss is continuously arranged around the axial direction of the sampling tube.

[0014] In one embodiment, the filter element is constructed as a sheet-like filter mesh structure, and the edge of the filter element is pressed against the surface of the annular boss facing the first end.

[0015] In one embodiment, the sampler further comprises an O-ring;

[0016] The O-ring is sandwiched between the positioning sleeve and the opposing surfaces of the filter element.

[0017] In one embodiment, the first end and the second end of the sampling tube are threadedly connected to the cover;

[0018] A plurality of first one-way ratchets are arranged around the wall portion of the first end of the sampling tube, and a plurality of second one-way ratchets are arranged on the side wall of the cover body provided on the first end at positions corresponding to the first one-way ratchets; the inclination direction of the first one-way ratchets and the second one-way ratchets is the same as the rotation direction when the threaded connection is screwed in.

[0019] In one embodiment, the sampler further comprises a sealing gasket;

[0020] A sealing gasket is sandwiched between the end surface of the first end of the sampling tube and the corresponding cover; and / or

[0021] A sealing gasket is sandwiched between the end surface of the second end of the sampling tube and the corresponding cover body.

[0022] A second aspect of an embodiment of the present application provides a sampling device, comprising a sampling spoon and the above-mentioned sampler.

[0023] In one embodiment, the outer wall of the sampling tube is provided with a snap-fit groove, and the sampling spoon is snap-fitted into the snap-fit groove.

[0024] Beneficial effects of the above-mentioned sampler and sampling device:

[0025] Because the filter element and the positioning protrusions separate the interior of the sampling tube into a first chamber and a second chamber, the first and second chambers are connected through the filter pores in the filter element. Therefore, once a sample, such as feces, is placed in the first chamber and a reagent is added, the sample and reagent mixture is filtered by the filter element. The liquid phase that has been filtered by the filter element can enter the second chamber, while the portion of the mixture that cannot pass through the filter element remains in the first chamber. At this point, simply by opening the corresponding cover on one side of the second chamber, the filtered liquid components can be removed from the second chamber for testing, providing more accurate test results.

[0026] The inner wall of the sampling tube is provided with a positioning protrusion, and one axial end of the positioning sleeve presses the filter against the positioning protrusion, allowing the filter to be sandwiched between the positioning sleeve and the positioning protrusion to achieve relative positioning of the filter and the sampling tube, thereby ensuring high installation reliability of the filter and the inner wall of the sampling tube. Furthermore, even if the filter moves axially in the sampling tube, it moves along the inner wall of the sampling tube in the direction of the arrangement of the first and second cavities, and the filter will not fall off the inner wall of the sampling tube, thereby ensuring the stable operation of the filter and the filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of the sampler provided in an embodiment of the present application;

[0028] Figure 2 A schematic cross-sectional view of a sampler according to an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the exploded structure of the sampler provided in an embodiment of the present application;

[0030] Figure 4 A schematic structural diagram of a positioning sleeve in a sampler provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of another structure of a sampler provided in an embodiment of the present application;

[0032] Figure 6 for Figure 5 A local enlarged view of point A;

[0033] Figure 7 A schematic diagram of the exploded structure of another structure of the sampler provided in an embodiment of the present application;

[0034] Figure 8 This is a schematic diagram of the structure of the sampling device provided in an embodiment of the present application.

[0035] Description of Figure Numbers:

[0036] 100. Sampler; 200. Sampling device;

[0037] 10. Sampling tube; 11. First end; 12. Second section; 13. Positioning protrusion; 14. Mating portion; 20. Filter element; 30. Positioning sleeve; 31. Thick-walled portion; 32. Scraping portion; 40. O-ring; 50. Cover; 51. Bottom wall; 52. Side wall; 520. Accommodating groove; 53. Sealing wall; 530. Abutting protrusion; 61. First one-way ratchet; 62. Second one-way ratchet; 64. Positioning groove; 80. Sampling spoon; 81. Rod; 82. Spoon body; 83. Neck section;

[0038] F, first cavity; S, second cavity; Y, sample placement area; C, accommodating space. DETAILED DESCRIPTION

[0039] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] In the description of the present invention, 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 to 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 invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0045] The following describes the sampler and sampling device of the embodiment of the present application in conjunction with the accompanying drawings. It should be noted that the sampler and sampling device in the present application are suitable for sampling a sample to be tested. The present application uses feces as an example for description. The case where the sample to be tested is of other types is similar and will not be further described here.

[0046] Figure 1 A schematic diagram of the structure of the sampler provided in an embodiment of the present application; Figure 2 A schematic cross-sectional view of a sampler according to an embodiment of the present invention; Figure 3 A schematic diagram of the exploded structure of the sampler provided in an embodiment of the present application; Figure 4 A schematic structural diagram of a positioning sleeve in a sampler provided in an embodiment of the present application; Figure 5 A schematic diagram of another structure of a sampler provided in an embodiment of the present application; Figure 6 for Figure 5 A local enlarged view of point A; Figure 7A schematic diagram of the exploded structure of another structure of the sampler provided in an embodiment of the present application; Figure 8 This is a schematic diagram of the structure of the sampling device provided in an embodiment of the present application.

[0047] It should be noted that Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 The drawings are all cross-sectional views, for example, they may be cross-sectional views along the axial direction of the sampling tube 10. In each drawing, the sampling tube 10, the filter element 20, the positioning sleeve 30, the cover body 50, the O-ring 40, etc. are all annular parts, and only half of the structure is shown in the drawings.

[0048] Reference Figure 1 、 Figure 2 The sampler 100 provided in the embodiment of the present application includes a sampling tube 10 , two covers 50 , and a filter 20 and a positioning sleeve 30 accommodated in the sampling tube 10 .

[0049] The sampling tube 10 includes a first end 11 and a second end 12, which are oppositely disposed. Two covers 50 are respectively disposed on the first and second ends 11, 12 of the sampling tube 10. A positioning protrusion 13 is provided on the inner wall of the sampling tube 10. A positioning sleeve 30 is fixedly connected to the sampling tube 10, with one axial end of the positioning sleeve 30 pressing the filter element 20 against the side of the positioning protrusion 13 facing the first end 11. The filter element 20 and the positioning protrusion 13 separate the interior of the sampling tube 10 into a first chamber F and a second chamber S. The first chamber F and the second chamber S are connected through the filter aperture in the filter element 20. The positioning sleeve 30 is located within the first chamber F.

[0050] Because the filter element 20 and the positioning protrusion 13 separate the interior of the sampling tube 10 into a first chamber F and a second chamber S, the first chamber F and the second chamber S are connected through the filter pores of the filter element 20. Therefore, once a sample, such as feces, is placed in the first chamber F and a reagent is added, the sample-reagent mixture is filtered by the filter element 20. The liquid phase filtered by the filter element 20 can enter the second chamber S, while the portion of the mixture that cannot pass through the filter element 20 remains in the first chamber F. At this point, by simply opening the cover 50 corresponding to one side of the second chamber S, the filtered liquid phase components can be removed from the second chamber S for testing, providing more accurate test results.

[0051] The inner wall of the sampling tube 10 is provided with a positioning protrusion 13. One axial end of the positioning sleeve 30 presses the filter element 20 against the side of the positioning protrusion 13 facing the first end 11. The filter element 20 can be sandwiched between the positioning sleeve 30 and the positioning protrusion 13 to achieve relative positioning of the filter element 20 and the sampling tube 10, thereby ensuring high installation reliability of the filter element 20 and the inner wall of the sampling tube 10. Furthermore, even if the filter element 20 moves axially in the sampling tube 10, it moves along the inner wall of the sampling tube 10 in the direction of the arrangement of the first cavity F and the second cavity S. The filter element 20 will not fall off the inner wall of the sampling tube 10, thereby ensuring the stable operation of the filter element 20 and the filtering effect.

[0052] Regarding the fixing method of the positioning sleeve 30 to the inner wall of the sampling tube 10, for example, the positioning sleeve 30 can be connected to the inner wall of the sampling tube 10 by interference fit, or the positioning sleeve 30 can be adhered to the inner wall of the sampling tube 10 by adhesive or other methods. Alternatively, the positioning sleeve 30 can also be clamped to the inner wall of the sampling tube 10 by providing a clamping portion or other methods.

[0053] Additionally, the tube body of the sampling tube 10 can be constructed as a straight tube, and the cross-section of the sampling tube 10 can be constant or variable along its length. The positioning sleeve 30 is a cylindrical member with open ends and a hollow interior. The filter element 20 can be provided with filtration apertures to prevent the passage of solid media of a certain size, while allowing liquid media in the mixture smaller than that size to pass smoothly. The filter element 20 can be, for example, a disc filter with approximately 70 mesh.

[0054] Here, the first end 11 and the second end 12 of the sampling tube 10 refer to the portions of the sampling tube 10 closest to the respective ends. Positioning protrusions 13 are provided on the inner wall of the sampling tube 10, meaning that the positioning protrusions 13 protrude a certain height from the inner wall of the sampling tube 10. Furthermore, the first chamber F and the second chamber S are connected through the filter pores of the filter element 20, meaning that the first chamber F and the second chamber S are connected to each other, but media larger than the filter pores cannot enter the second chamber S from the first chamber F or vice versa.

[0055] In a specific implementation, the side of the positioning sleeve 30 facing away from the filter element 20 can be flush with the first end 11 . In this way, the cover 50 can be used to assist in positioning the positioning sleeve 30 , further improving the positioning reliability of the filter element 20 .

[0056] In the embodiment of the present application, the outer wall of the positioning sleeve 30 is fitted to the inner wall of the sampling tube 10 , and the inner wall of the positioning sleeve 30 , the filter element 20 and the positioning boss together define the sample placement area Y.

[0057] The outer wall of the positioning sleeve 30 is attached to the inner wall of the sampling tube 10, so that there is no gap between the positioning sleeve 30 and the inner wall of the sampling tube 10, and the sample can only be accommodated inside the positioning sleeve 30. At this time, the second cavity S can form a sampling area for the liquid medium.

[0058] In the embodiment of this application, Figure 3 and Figure 4 Part of the wall of the positioning sleeve 30 is formed into a thick-walled portion 31 with a locally increased thickness.

[0059] This arrangement can reduce the volume of the sample placement area Y, preventing an excessive amount of sample in the sample placement area Y from affecting the detection effect. Specifically, for example, a portion of the circumferential wall of the positioning sleeve 30 can be formed as a thick-walled portion 31. Of course, the thick-walled portion 31 is configured to be thicker along the entire axial direction of the positioning sleeve 30. The present application is not limited thereto, and the thick-walled portion 31 can be configured at other locations on the positioning sleeve 30, such as a portion of the axial wall section, as long as the purpose of reducing the volume of the sample placement area Y is achieved.

[0060] In the embodiment of the present application, a scraping portion 32 is further provided on the inner wall of the positioning sleeve 30 , and the scraping portion 32 is located between the two axial ends of the positioning sleeve 30 .

[0061] With this arrangement, after the cover 50 at the first end 11 is opened, the sampling spoon 80 can carry the sample into the sample placement area. The sampling spoon 80 can then scrape against the scraping portion 32, thereby scraping off the sample stuck to the sampling spoon 80 and dropping it into the sample placement area. Furthermore, the sampling spoon 80 can also press against the scraping portion 32, thereby breaking off the rod 81 of the sampling spoon 80, leaving the spoon body 82 of the sampling spoon 80 in the sample placement area.

[0062] In specific implementation, the scraping portion 32 can be arranged on the inner surface of the thick-walled portion 31, or on the inner wall of the positioning sleeve 30 where the thickness is relatively thin. As long as it is arranged on the inner wall of the positioning sleeve 30 and can contact and act on the spoon body 82, it will be fine.

[0063] In the embodiment of this application, Figure 5 、 Figure 6 and Figure 7 The cover 50 includes a bottom wall 51 and a side wall 52 connected to the outer edge of the bottom wall 51. An annular sealing wall 53 is provided on the bottom wall 51. The sealing wall 53 and the side wall 52 are spaced apart along the radial direction of the sealing wall 53 to define an accommodating space C. When the cover 50 is placed on the first end 11 or the second end 12, the portion of the sampling tube 10 near the first end 11 or the second end 12 extends into the accommodating space C, and the outer circumferential surface of the sealing wall 53 abuts the inner wall of the portion of the tube.

[0064] Thus, when the cover 50 is placed on the first end 11 or the second end 12, the sealing wall 53 can seal the cover 50 and the sampling tube 10. This improves the sealing performance of the cover 50 to the sample. Figure 5 As shown, the cover bodies 50 at the first end 11 and the second end 12 are both configured to include a sealing wall 53 .

[0065] Reference Figure 6 The thickness of the sealing wall 53 increases and then decreases in a direction away from the bottom wall 51 , so as to form an annular abutment protrusion 530 on the outer wall of the sealing wall 53 to guide the insertion of the end of the sampling tube 10 .

[0066] The abutment protrusion 530 can abut the inner wall of the sampling tube 10. This configuration allows the outer circumference of the sealing wall 53 to form an outwardly convex arc surface. The lower half of the arc surface can guide the first end 11 or the second end 12 when inserted into the accommodating space C. The upper half has a thinner root, which can facilitate the deformation of the sealing wall 53. When the first end 11 or the second end 12 is inserted into the accommodating space C, it contacts the lower half of the sealing wall 53, causing the entire sealing wall 53 to be squeezed inward and deformed. After the cover is closed, the abutment protrusion 530 on the outer circumference of the sealing wall 53 just abuts the inner wall of the sampling tube 10. In addition, a relief groove is provided on the inner wall of the sampling tube 10 at a position corresponding to the abutment protrusion 530. The relief groove forms a step portion 531 on the inner wall of the sampling tube 10, which can be used to abut the end of the sealing wall 53.

[0067] In the present application, refer to Figure 3 The positioning protrusion 13 is constructed as an annular boss, which is continuously arranged around the axial direction of the sampling tube 10.

[0068] With such an arrangement, the annular boss can better support the filter element 20 in the circumferential direction of the sampling tube 10. When there is a gap between the filter element 20 and the inner wall of the sampling tube 10 due to tolerance, the gap can also be blocked by the annular boss, so that the filtering effect of the above mixture is better.

[0069] Of course, in some other embodiments, the positioning protrusion 13 may also be a discontinuous structure in the circumferential direction of the sampling tube 10 , and the filter element 20 can still be pressed against the positioning protrusion 13 .

[0070] In the embodiment of the present application, the filter element 20 is constructed as a sheet-shaped filter mesh structure, and the edge of the filter element 20 is pressed against the surface of the annular boss facing the first end 11.

[0071] In specific implementation, the outer edge contour of the filter element 20 needs to match the inner wall surface of the sampling tube 10. On the one hand, it is convenient for the inner surface of the sampling tube 10 to position the filter element 20. On the other hand, it is also necessary to avoid as much as possible the gap between the outer edge of the filter element 20 and the inner surface of the sampling tube 10, which affects the filtering effect.

[0072] Furthermore, the sampler 100 further includes an O-ring 40 , which is sandwiched between opposite surfaces of the positioning sleeve 30 and the filter element 20 .

[0073] This can avoid gaps between the filter element 20 and the positioning sleeve 30, thereby improving the filtering effect.

[0074] Of course, in Figure 5 In the embodiment shown, in order to save the number of parts, the O-ring 40 can be omitted.

[0075] Further, refer to Figure 2 The first end 11 and second end 12 of the sampling tube 10 are threadedly connected to the cover 50. A plurality of first one-way ratchet teeth 61 are disposed around the wall of the first end 11 of the sampling tube 10. A plurality of second one-way ratchet teeth 62 are disposed on the sidewall 52 of the cover 50 covering the first end 11, corresponding to the first one-way ratchet teeth 61. The first and second one-way ratchet teeth 61, 62 are inclined in the same direction as the threaded connection during screwing.

[0076] In a specific implementation, the outer wall of at least one of the first end 11 and the second end 12 of the sampling tube 10 is provided with an external thread, and the side wall 52 of the cover 50 is provided with an internal thread that mates with the external thread. The first one-way ratchet 61 can be located on the outer wall of the first end 11 of the sampling tube 10, on the side where the external thread is screwed in. The first and second one-way ratchet teeth 61, 62 are inclined in the same direction as the direction of rotation of the external thread on the outer wall of the first end 11 when screwing in.

[0077] In this arrangement, after at least one of the first end 11 and the second end 12 of the sampling tube 10 is threadedly engaged with the corresponding cover body 50, when it continues to rotate in the rotation direction of the threaded engagement, the first one-way ratchet 61 and the second one-way ratchet 62 contact each other again. The first one-way ratchet 61 and the second one-way ratchet 62 can continue to rotate in the original direction, but cannot rotate in the opposite direction, thereby preventing the cover body 50 from detaching.

[0078] In some other embodiments, a plurality of first one-way ratchet teeth 61 are disposed around the outer wall of the second end 12 of the sampling tube 10, and the second one-way ratchet teeth 62 are not disposed on the cover 50 that engages with the second end 12, so as to prevent the cover 50 from locking with the second end 12. In this case, the first one-way ratchet teeth 61 on the second end 12 have a similar structure to the first one-way ratchet teeth 61 on the first end 11.

[0079] Alternatively, the sidewall 52 of the cover 50 covering the second end 12 of the sampling tube 10 may be provided with a plurality of second one-way ratchet teeth 62, but the outer wall of the second end 12 may not be provided with the first one-way ratchet teeth 61. This prevents the cover 50 from locking with the second end 12. In this case, the second one-way ratchet teeth 62 on the cover 50 covering the second end 12 have a similar structure to the second one-way ratchet teeth 62 on the cover 50 covering the first end 11. This saves mold making costs for the cover 50 and reduces production costs.

[0080] In other embodiments, the inner wall of at least one of the first end 11 and the second end 12 of the sampling tube 10 may be internally threaded, and the side wall 52 of the cover 50 may be externally threaded to mate with the internally threaded portion. The first one-way ratchet teeth 61 may be located on the inner wall of the first end 11, on the side where the internal threads are screwed in. The first and second one-way ratchet teeth 61, 62 may be inclined in the same direction as the direction of rotation of the internal threads on the inner wall of the first end 11 when being screwed in.

[0081] Further, refer to Figure 2 , the sampler 100 also includes a sealing gasket 63. For ease of observation, Figure 2 In the figure, the position of the sealing gasket 63 is decomposed to above the cover 50. However, in reality, the sealing gasket 63 is sandwiched between the end surface of the first end 11 of the sampling tube 10 and the corresponding cover 50. Furthermore, the sealing gasket 63 is sandwiched between the end surface of the second end 12 of the sampling tube 10 and the corresponding cover 50.

[0082] In this way, a better seal can be achieved between the cover 50 and the sampling tube 10. Of course, an annular positioning groove 64 can be provided on the side wall 52 of the cover 50 at the position corresponding to the sealing gasket. The edge of the sealing gasket 63 can be accommodated in the positioning groove 64, so that when the cover 50 is taken off from the sampling tube 10, the sealing gasket 63 will not fall off the cover 50. Figure 5 、 Figure 6 In the illustrated embodiment, when the sealing wall 53 is provided, the sealing gasket 63 may not be provided.

[0083] A second aspect of the embodiment of the present application further provides a sampling device, comprising a sampling spoon 80 and the above-mentioned sampler 100 .

[0084] Furthermore, a snap-fit groove (not shown) is provided on the outer wall of the sampling tube 10 , and the sampling spoon 80 is snap-fitted into the snap-fit groove.

[0085] The sampling spoon 80 includes a rod body 81 and a spoon body 82 connected to each other. The rod body 81 is provided with a locally necked neck portion 83. After the sampling is completed, the rod body 81 can be abutted against the wall of the sample placement area Y or the scraping portion 32, and force is applied to the rod body 81, so that the rod body 81 will break at the neck portion 83, leaving the spoon body 82 of the sampling spoon 80 in the sample placement area Y.

[0086] The following combination Figure 2 The working process of the sampler 100 according to the embodiment of the present application is described.

[0087] Open the cover 50 on the first end 11 of the sampling tube 10, place the sample in the sampling spoon 80 into the sample placement area Y, press the spoon 82 against the scraper 32, and break the stem 81 at the constricted neck 83. Add the reagent to the sample placement area Y, and close the cover 50 over the first end 11. After mixing, flip the sampling tube 10 over and open the cover 50 from the second end 1 to remove the filtered liquid from the second chamber S for testing.

[0088] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A sampler, characterized in that: It comprises a sampling tube, two covers, and a filter element and a positioning sleeve accommodated in the sampling tube; The sampling tube includes a first end and a second end that are arranged opposite to each other, and the two covers are respectively covered on the first end and the second end of the sampling tube; a positioning protrusion is convexly provided on the inner wall of the sampling tube, and the positioning sleeve is fixedly connected to the sampling tube, and an axial end of the positioning sleeve presses the filter element against the positioning protrusion; the filter element and the positioning protrusion separate the interior of the sampling tube into a first cavity and a second cavity, the first cavity and the second cavity are connected through the filter pores on the filter element, and the positioning sleeve is located in the first cavity.

2. The sampler according to claim 1, characterized in that The outer wall of the positioning sleeve is fitted on the inner wall of the sampling tube, and the inner wall of the positioning sleeve, the filter element and the positioning boss together define a sample placement area.

3. The sampler according to claim 2, characterized in that Part of the wall of the positioning sleeve is formed as a thick-walled portion with locally increased thickness.

4. The sampler according to claim 3, characterized in that The inner wall of the positioning sleeve is further provided with a scraping portion, and the scraping portion is located between the two axial ends of the positioning sleeve.

5. The sampler according to claim 1, characterized in that The cover body includes a bottom wall and a side wall connected to the outer edge of the bottom wall; An annular sealing wall is provided on the bottom wall, and the sealing wall and the side wall are spaced apart along the radial direction of the sealing wall to define an accommodating space. When the cover body is covered on the first end or the second end, the partial tube section of the sampling tube close to the first end or the second end extends into the accommodating space, and the outer peripheral surface of the sealing wall abuts against the inner wall of the tube section.

6. The sampler according to claim 5, characterized in that The thickness of the sealing wall first increases and then decreases in a direction away from the bottom wall, so as to form an annular abutting protrusion on the outer wall of the sealing wall.

7. The sampler according to any one of claims 1 to 6, characterized in that The positioning protrusion is configured as an annular boss, and the annular boss is continuously arranged around the axial direction of the sampling tube.

8. The sampler according to claim 7, characterized in that The filter element is constructed as a sheet-shaped filter mesh structure, and the edge of the filter element is pressed against the surface of the annular boss facing the first end.

9. The sampler according to claim 7, characterized in that The sampler also includes an O-ring; The O-ring is sandwiched between the positioning sleeve and the opposite surfaces of the filter element.

10. The sampler according to any one of claims 1 to 6, characterized in that: The first end and the second end of the sampling tube are threadedly connected to the cover body; A plurality of first one-way ratchets are arranged around the wall portion of the first end of the sampling tube, and a plurality of second one-way ratchets are arranged on the side wall of the cover body provided on the first end at positions corresponding to the first one-way ratchets; the inclination direction of the first one-way ratchets and the second one-way ratchets is the same as the rotation direction of the threaded connection when it is screwed in.

11. The sampler according to any one of claims 1 to 6, characterized in that: The sampler also includes a sealing gasket; The sealing gasket is sandwiched between the end surface of the first end of the sampling tube and the corresponding cover body; and / or The sealing gasket is sandwiched between the end surface of the second end of the sampling tube and the corresponding cover body.

12. A sampling device, characterized in that: The invention comprises a sampling spoon and a sampler as claimed in any one of claims 1 to 11.

13. The sampling device according to claim 12, characterized in that The outer wall of the sampling tube is provided with a clamping groove, and the sampling spoon is clamped and fitted in the clamping groove.

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