Sampling detection device

Abstract

The utility model discloses a sampling detection device. The sampling detection device comprises a main body, a detection piece and a piston assembly, the main body is provided with a liquid suction port and a containing cavity which are communicated with each other; the detection piece is arranged in the accommodating cavity; the piston assembly is at least partially arranged in the containing cavity, and the piston assembly can move relative to the main body so that liquid can enter the containing cavity from the liquid suction opening to make contact with the detection piece. According to the sampling and detecting device, sampling and detecting are integrated, so that the sampling and detecting device is convenient to use, not easy to pollute and accurate in detecting result.

Description

Technical Field

[0001] This utility model relates to the field of liquid detection technology, and in particular to a sampling and detection device. Background Technology

[0002] In related technologies, immunochromatographic detection products typically consist of a plastic casing and a test strip fixed inside the plastic casing. The plastic casing has a sample application hole, the position of which corresponds to the sample pad of the test strip.

[0003] When using this method, it is necessary to use a dropper to collect samples and drop them into the sample well to control the amount of sample added. This operation is cumbersome. In addition, when using a dropper for transfer, it is easy to drop or cause secondary contamination, resulting in inaccurate test results. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a sampling and detection device that is easy to use, not easily contaminated, and provides accurate detection results.

[0005] The sampling and detection device according to an embodiment of the present invention includes: a main body having a liquid suction port and a receiving cavity that are in communication with each other; a detection element disposed in the receiving cavity; and a piston assembly at least partially disposed in the receiving cavity, the piston assembly being movable relative to the main body to allow liquid to enter the receiving cavity from the liquid suction port and contact the detection element.

[0006] According to the sampling and detection device of this utility model embodiment, no dropper is needed during sampling. The suction port is directly inserted into the liquid sample, and then the piston assembly is pulled to draw the liquid sample into the receiving cavity and into contact with the detection element. There is no need to use a pipette structure for sample transfer, making the operation more convenient. It also avoids the problem of pipette structures easily falling off or causing secondary contamination, leading to inaccurate test results. Furthermore, the amount of liquid sample drawn in can be controlled by adjusting the movement distance of the piston assembly, thus controlling the amount of liquid sample in contact with the detection element and obtaining more accurate test results.

[0007] In some embodiments, the piston assembly includes a pull rod and a piston, one end of the pull rod being located in the receiving cavity and connected to the piston, and the other end of the pull rod having a gripping portion located outside the body.

[0008] In some embodiments, the other end of the lever is provided with an indicator mark for marking changes in the movement position of the piston assembly.

[0009] In some embodiments, the piston assembly includes a plurality of the pull rods extending along a first direction and the plurality of pull rods arranged along a second direction perpendicular to the first direction.

[0010] In some embodiments, the sampling and detection device further includes a connector that forms the grip portion and connects to the other end of the plurality of pull rods.

[0011] In some embodiments, the main body has a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion being arranged spaced apart along the movement direction of the piston assembly, the piston assembly having a third limiting portion and a fourth limiting portion, the third limiting portion and the fourth limiting portion being arranged spaced apart along the movement direction of the piston assembly, the first limiting portion cooperating with the third limiting portion to limit a first extreme movement position of the piston assembly, and the second limiting portion cooperating with the fourth limiting portion to limit a second extreme movement position of the piston assembly.

[0012] In some embodiments, the body has a partition that separates the receiving cavity to form a first chamber and a second chamber, the piston assembly is disposed in the first chamber, the detection element is at least partially disposed in the second chamber, and the first chamber and the second chamber are connected by a communication hole.

[0013] In some embodiments, one end of the detection element passes through the communication hole and extends into the first chamber.

[0014] In some embodiments, one end of the detection element is interference-fitted with the connecting hole.

[0015] In some embodiments, the first chamber includes a first part and a second part, the first part being provided with the piston assembly, the second part being disposed between the suction port and the first part, and the cross-sectional size of the second part gradually decreasing along the direction close to the suction port.

[0016] In some embodiments, a one-way valve is provided at the suction port, and the one-way valve unidirectionally flows from the suction port to the receiving cavity.

[0017] In some embodiments, the body includes a first housing and a second housing that overlap each other, the first housing and the second housing defining the receiving cavity, and at least one of the first housing and the second housing having the partition.

[0018] In some embodiments, the detection element is an immunochromatographic detection element, and the main body has an observation window, which is correspondingly set with the result display area of ​​the immunochromatographic detection element.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is an exploded structural diagram of the sampling and detection device according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the piston assembly of the sampling and detection device according to an embodiment of the present invention when it is not pulled out;

[0023] Figure 3 This is a schematic diagram of the structure of the sampling and detection device after the piston assembly of this utility model has been extracted;

[0024] Figure 4 for Figure 1 A schematic diagram of the structure of part A.

[0025] Figure label:

[0026] Sampling and detection device 100;

[0027] Main body 10;

[0028] Liquid suction port 101; receiving cavity 102; partition 103; first chamber 104; first part 1041;

[0029] Part 2 1042; Second chamber 105; First shell 106; Second shell 107; Observation window 108;

[0030] Connecting hole 1031; Connecting post 1061; Connecting hole 1071;

[0031] Item 20 was inspected;

[0032] Piston assembly 30;

[0033] 301; 302; 303; 304; 305;

[0034] First direction F1; Second direction F2. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order or hierarchy.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "attachment," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the embodiments of this utility model, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this utility model shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this utility model.

[0040] In this utility model, "multiple" refers to two or more (including two).

[0041] The following is combined Figures 1 to 4The sampling and detection device 100 of this utility model is described below.

[0042] like Figures 1 to 4 As shown, the sampling and detection device 100 according to an embodiment of the present invention includes a main body 10, a detection element 20, and a piston assembly 30. The main body 10 has a liquid suction port 101 and a receiving cavity 102 that are interconnected. The detection element 20 is disposed in the receiving cavity 102. The piston assembly 30 is at least partially disposed in the receiving cavity 102. The piston assembly 30 is movable relative to the main body 10 so that liquid enters the receiving cavity 102 from the liquid suction port 101 and contacts the detection element 20.

[0043] Specifically, the main body 10 has a liquid suction port 101 and a receiving cavity 102 that are interconnected, meaning that liquid can enter the receiving cavity 102 from the liquid suction port 101. A detection element 20 is disposed in the receiving cavity 102. For example, the detection element 20 can be positioned close to the liquid suction port 101 so that as much liquid as possible entering the receiving cavity 102 can be absorbed by the detection element 20. Therefore, the amount of liquid sample entering the detection element 20 can be controlled by controlling the suction volume of the sampling and detection device 100 in this embodiment. Here, the detection element 20 is used to detect a certain target substance in the liquid. When the target substance enters the detection element 20, the substances in the detection element 20 react with the target substance, causing a change in the appearance of the detection element 20 to indicate the presence of the target substance.

[0044] For example, the detection element 20 can be an immunochromatographic detection element, which can be an immunochromatographic test strip or an immunochromatographic test stick. The immunochromatographic detection element 20 utilizes the specific immune reaction between antigen and antibody to detect the target analyte. The immunochromatographic detection element 20 can be a test strip, which serves as a solid-phase carrier. The test strip mainly consists of a sample pad, a conjugation pad, a reaction membrane (nitrocellulose membrane), and an absorbent pad: the sample pad receives and pre-treats the liquid sample, such as through filtration and buffering; the conjugation pad contains labeled antibodies or antigens, etc., for binding with the target analyte in the liquid sample; the reaction membrane is the core component, with a detection line (T line) and a control line (C line) (see reference). Figure 2 and Figure 3 The T-line contains substances that can specifically bind to the target analyte, and the C-line is used to verify the effectiveness of the test strip; the absorbent pad absorbs liquid through capillary action, causing the liquid sample to continuously flow from the sample pad to the test strip.

[0045] The piston assembly 30 is at least partially disposed within the receiving cavity 102. The piston assembly 30 is movable relative to the main body 10. For example, the piston 302 moves in a direction away from the suction port 101 so that the volume of the portion of the receiving cavity 102 between the piston assembly 30 and the suction port 101 increases and the pressure decreases, so that the liquid sample can be drawn from the suction port 101 into the receiving cavity 102. Since the detection element 20 is disposed in the receiving cavity 102, the liquid sample entering the receiving cavity 102 comes into contact with the detection element 20 and is absorbed by the detection element 20.

[0046] Specifically, the piston assembly 30 can be moved relative to the main body 10 by manually pulling it; or, in some embodiments, the piston assembly 30 can be moved relative to the main body 10 by providing a driving member. The piston assembly 30 may be partially disposed within the receiving cavity 102, or the piston assembly 30 may be completely disposed within the receiving cavity 102.

[0047] According to the sampling and detection device 100 of this application embodiment, sampling does not require the use of a dropper. During sampling, the suction port 101 is directly inserted into the liquid sample, and then the piston assembly 30 is pulled to draw the liquid sample into the receiving cavity 102 and into contact with the detection element 20. There is no need to use a pipette structure for liquid sample transfer, making the operation more convenient. It also avoids the problem of the pipette structure easily falling off or causing secondary contamination during transfer, leading to inaccurate detection results. Furthermore, the amount of liquid sample drawn in can be controlled by controlling the movement distance of the piston assembly 30, thus controlling the amount of liquid sample in contact with the detection element 20 and obtaining more accurate detection results.

[0048] According to some embodiments of this utility model, it can be referred to Figure 1 The piston assembly 30 includes a pull rod 301 and a piston 302. One end of the pull rod 301 is located in the receiving cavity 102 and connected to the piston 302. The other end of the pull rod 301 has a holding part 303, which is located outside the main body 10.

[0049] Specifically, you can refer to Figure 1 The receiving cavity 102 includes a first part 1041, and the piston assembly 30 includes a piston 302. The piston 302 is sealed to the circumferential wall of the first part 1041 to achieve a suction effect. When suctioning a liquid sample, the operator can pull the lever 301 by pulling the handle 303, which in turn moves the piston 302 to achieve suction of the liquid sample. By using the lever 301 and the handle 303 to drive the piston 302, the structure is simpler and the cost of use is lower.

[0050] For example, the size of the grip portion 303 may be larger than the size of the pull rod 301 in the extending direction perpendicular to the pull rod 301. It should be noted that the size of the sampling and detection device 100 is generally small, and the pull rod 301 is relatively slender. Therefore, the size of the grip portion 303 is larger than the size of the pull rod 301 in the extending direction perpendicular to the pull rod 301, which makes it easier for the operator to grip it stably.

[0051] According to some embodiments of this utility model, it can be referred to Figures 1 to 3 The other end of the lever 301 is provided with an indicator mark 304, which is used to mark the change in the moving position of the piston assembly 30.

[0052] For example, it can be referred to again Figures 1 to 3 The indicator mark 304 can be a scale line, which can be referenced to indicate that the lever 301 has been pulled out by 5mm or 1cm, etc., so that the distance pulled out of the lever 301 can be directly known, thereby controlling the amount of liquid sample drawn and realizing quantitative aspiration sampling. Alternatively, the indicator mark 304 can be just a position marker. For example, the lever 301 can only be marked with the target pull-out position. When the user pulls the lever 301 to the target pull-out position, he / she can stop pulling to realize quantitative aspiration sampling.

[0053] By setting an indicator mark 304 at the other end of the lever 301, the movement position change of the piston 302 can be more accurately determined by the indicator mark 304. In turn, the amount of liquid sample drawn in can be controlled by controlling the movement position change of the piston 302, so that the amount of liquid sample drawn in can be controlled more accurately according to the needs and the amount of liquid sample drawn in can be changed more precisely.

[0054] According to some embodiments of this utility model, it can be referred to Figure 1 The piston assembly 30 includes a plurality of pull rods 301, which extend along a first direction F1 and are arranged along a second direction F2, which is perpendicular to the first direction F1.

[0055] For example, two pull rods 301 may be provided, with the two pull rods 301 located on both sides of the detection element 20.

[0056] By setting multiple pull rods 301, each of which is connected to a piston 302, the piston assembly 30 has a larger suction cross-section, which is beneficial for efficient and rapid liquid suction.

[0057] According to some embodiments of this utility model, it can be referred to Figures 1 to 3 The sampling and detection device 100 also includes a connector 305, which forms a holding part 303 and connects to the other end of a plurality of pull rods 301.

[0058] By connecting the other ends of multiple pull rods 301 with a connector 305, the connector 305 can connect multiple pull rods 301 together. By pulling the connector 305, multiple pull rods 301 can be pulled at the same time. The resulting overall structure has better stability and higher strength. When pulled, the pull rods 301 are less likely to shake or break.

[0059] In some embodiments, there are two pull rods 301, which are respectively located on both sides of the detection element 20. The connector 305 connects the other ends of the two pull rods 301. In this way, the dimension of the connector 305 perpendicular to the extension direction of the pull rod 301 can be as large as possible, so that it is easier for the operator to grip.

[0060] According to some embodiments of the present invention, the main body 10 has a first limiting part and a second limiting part, the first limiting part and the second limiting part are arranged at a distance from each other along the movement direction of the piston assembly 30, the piston assembly 30 has a third limiting part and a fourth limiting part, the third limiting part and the fourth limiting part are arranged at a distance from each other along the movement direction of the piston assembly 30, the first limiting part can cooperate with the third limiting part to limit the first extreme movement position of the piston assembly 30, and the second limiting part can cooperate with the fourth limiting part to limit the second extreme movement position of the piston assembly 30.

[0061] For example, the main body 10 has a limiting groove, and the two side walls of the limiting groove opposite to each other along the movement direction of the piston assembly 30 are respectively formed as a first limiting part and a second limiting part. The pull rod 301 forms a limiting block, and the two side walls of the limiting block opposite to each other along the movement direction of the piston assembly 30 are respectively formed as a third limiting part and a fourth limiting part. The limiting block is at least partially disposed in the limiting groove. The first limiting part and the third limiting part abut against each other to limit the first extreme movement position of the piston assembly 30, and the second limiting part and the fourth limiting part abut against each other to limit the second extreme movement position of the piston assembly 30.

[0062] For example, before the piston assembly 30 is withdrawn, the piston assembly 30 is located in the first limit movement position. After the piston assembly 30 is withdrawn, the piston assembly 30 can be directly pulled to the second limit movement position. Thus, the operator can quickly control the amount of sample liquid drawn without referring to the indicator mark 304, realize quantitative sampling, make the operation more convenient, and help improve the accuracy of detection.

[0063] According to some embodiments of this utility model, it can be referred to Figure 1 and Figure 4The main body 10 has a partition 103, which divides the receiving cavity 102 to form a first chamber 104 and a second chamber 105. The piston assembly 30 is disposed in the first chamber 104, and the detection element 20 is at least partially disposed in the second chamber 105. The first chamber 104 and the second chamber 105 are connected through a connecting hole 1031.

[0064] Here, by setting up a second chamber 105 to accommodate the detection element 20, the detection element 20 can be protected to a certain extent, so that the liquid sample enters the second chamber 105 through the connecting hole 1031 as much as possible, and only contacts the sample receiving end of the detection element 20, without contacting other parts of the detection element 20, thereby improving the accuracy of the detection results of the detection element 20.

[0065] Exemplarily, the detection element 20 may be partially located in the second chamber 105, passing through the connecting hole 1031 and extending one end into the first chamber 104. Exemplarily, one end of the detection element 20 may be located in the connecting hole 1031, with the remaining portion of the detection element 20 located in the second chamber 105. Exemplarily, the detection element 20 may also be entirely located in the second chamber 105, allowing a liquid sample to enter the second chamber 105 through the connecting hole 1031 and contact the detection element 20, with the sample receiving end of the detection element 20 positioned close to the connecting hole 1031.

[0066] According to some embodiments of the present invention, one end of the detection element 20 passes through the connecting hole 1031 and extends into the first chamber 104.

[0067] In other words, the test piece 20 is partially located in the second chamber 105 and partially located in the first chamber 104. For example, the test piece 20 is an immunochromatographic test strip, and the sample pad of the immunochromatographic test strip is at least partially located in the first chamber 104.

[0068] In this way, the liquid sample entering the first chamber 104 can be absorbed by the detection element 20 as much as possible. Even if one end of the detection element 20 does not contact the suction port 101, due to the surface tension of the liquid and the capillary action of the detection element 20, the detection element 20 can completely absorb the small amount of liquid remaining at the suction port 101, thus ensuring that the sucked liquid sample is absorbed by the detection element 20 as completely as possible.

[0069] In some embodiments, one end of the detection element 20 may be positioned close to the liquid suction port 101 so that the detection element 20 can quickly absorb all the liquid entering the first chamber 104 as much as possible.

[0070] According to some embodiments of the present invention, one end of the detection element 20 is interference-fitted with the connecting hole 1031.

[0071] For example, the test element 20 is an immunochromatographic test strip, and the sample pad of the immunochromatographic test strip is interference-fitted with the connecting hole 1031.

[0072] In this way, the first chamber 104 and the second chamber 105 can be completely separated, which can prevent the liquid sample from leaking from the connecting hole 1031 into the second chamber 105 and contaminating other parts of the detection element 20 located in the second chamber 105. This also allows only one end of the detection element 20 to be in direct contact with the liquid sample as much as possible, thereby improving the accuracy of the detection results.

[0073] According to some embodiments of this utility model, it can be referred to Figure 1 The first chamber 104 includes a first part 1041 and a second part 1042. The first part 1041 is provided with a piston assembly 30. The second part 1042 is located between the suction port 101 and the first part 1041. The cross-sectional size of the second part 1042 gradually decreases along the direction close to the suction port 101.

[0074] In other words, when the sampling and detection device 100 of this application aspirates a liquid sample, the liquid sample enters the second part 1042 from the suction port 101, and then enters the first part 1041 from the second part 1042. The second chamber 105 and the second part 1042 are connected through the connecting hole 1031 so that the liquid sample can contact one end of the detection element 20.

[0075] Here, the cross-section of the second part 1042 refers to the cross-section of the second part 1042 perpendicular to the direction near the suction port 101. The cross-sectional size of the second part 1042 gradually decreases along the direction near the suction port 101. This allows the liquid level to rise faster when the liquid sample is aspirated, enabling the liquid sample to be drawn to the detection element 20 more quickly. Simultaneously, it allows most of the liquid sample drawn into the first chamber 104 to accumulate near the detection element 20, facilitating complete absorption of the liquid sample by the detection element 20.

[0076] According to some embodiments of the present invention, a one-way valve is provided at the suction port 101, and the one-way valve conducts unidirectionally in the direction from the suction port 101 to the receiving cavity 102.

[0077] For example, the one-way valve can be a unidirectional sealing membrane, or the one-way valve can be a movable sealing ball set at the suction port 101. When the piston assembly 30 moves to aspirate the liquid sample, the sealing ball will move away from the suction port 101 and into the receiving cavity 102. When the piston assembly 30 stops aspirating, the sealing ball will reset under the action of gravity or under the action of the restoring force of the restoring member connected to the sealing ball, thus sealing the suction port 101.

[0078] By setting a one-way valve at the suction port 101, the liquid sample can remain in the receiving cavity 102 after the sampling process is completed, instead of flowing out from the suction port 101. This further promotes the complete absorption of the liquid sample by the detection element 20, thereby ensuring the accuracy of the sampling amount and improving the accuracy of the detection results.

[0079] According to some embodiments of this utility model, it can be referred to Figure 1 The main body 10 includes a first housing 106 and a second housing 107 that overlap each other. The first housing 106 and the second housing 107 define a receiving cavity 102. At least one of the first housing 106 and the second housing 107 is provided with a partition 103, which separates the receiving cavity 102 to form a first chamber 104 and a second chamber 105.

[0080] For example, only the first housing 106 may have a partition 103, which abuts against the second housing 107 to define the second chamber 105 and the first chamber 104; or, only the second housing 107 may have a partition 103, which abuts against the first housing 106 to define the first chamber 104 and the second chamber 105; or, both the first housing 106 and the second housing 107 may have a partition 103, with the edges of the partition 103 of the first housing 106 and the partition 103 of the second housing 107 abutting against each other to define the first chamber 104 and the second chamber 105.

[0081] Furthermore, one can refer to Figure 1 The first housing 106 may be provided with one of the connecting post 1061 and the connecting hole 1071, and the second housing 107 may be provided with the other of the connecting post 1061 and the connecting hole 1071. The connecting post 1061 and the connecting hole 1071 are inserted into each other to realize the positioning connection between the first housing 106 and the second housing 107.

[0082] According to some embodiments of this utility model, it can be referred to Figures 1 to 3 The test piece 20 is an immunochromatographic test piece, and the main body 10 has an observation window 108, which is set to correspond to the result display area of ​​the immunochromatographic test piece 20.

[0083] For example, the result display area of ​​the immunochromatographic assay 20 is also called the reaction membrane, and the observation window 108 is correspondingly set with the reaction membrane. For example, a light-transmitting element can be provided at the observation window 108 to isolate the result display area of ​​the immunochromatographic assay 20 from the external environment, thereby reducing the possibility of contamination of the result display area. For example, the light-transmitting element can be a transparent plastic or glass element. At the same time, it also allows the operator to directly observe the result display area of ​​the immunochromatographic assay 20 and read the test results through the light-transmitting element.

[0084] Here, by setting up an observation window 108, the operator can directly observe the result display area of ​​the immunochromatographic detection piece 20 and read the test results through the observation window 108.

[0085] In other embodiments, the main body 10 may also be made entirely of transparent material, or the first housing 106 or the second housing 107 may be made of transparent material so that the result display area of ​​the immunochromatographic detection element 20 can be directly observed.

[0086] In some embodiments, a sealing ring may be provided at the connection between the first housing 106 and the second housing 107 (e.g., between the outer circumferential edge of the first housing 106 and the outer circumferential edge of the second housing 107; e.g., between the separator 103 and the first housing 106, or between the separator 103 and the second housing 107, or between the two separators 103), or the connection may be made by ultrasonic welding or adhesive sealing to ensure good sealing at the connection.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A sampling and detection device, characterized in that, include: The main body (10) has a liquid suction port (101) and a receiving cavity (102) that are in communication with each other; A detection element (20) is disposed in the receiving cavity (102); A piston assembly (30) is at least partially disposed within the receiving cavity (102), and the piston assembly (30) is movable relative to the body (10) to allow liquid to enter the receiving cavity (102) from the suction port (101) and contact the detection element (20).

2. The sampling and detection device according to claim 1, characterized in that, The piston assembly (30) includes a pull rod (301) and a piston (302). One end of the pull rod (301) is located in the receiving cavity (102) and connected to the piston (302). The other end of the pull rod (301) has a gripping part (303) located outside the main body (10).

3. The sampling and detection device according to claim 2, characterized in that, The other end of the pull rod (301) is provided with an indicator mark (304), which is used to mark the change in the moving position of the piston assembly (30).

4. The sampling and detection device according to claim 2, characterized in that, The piston assembly (30) includes a plurality of the pull rods (301) extending along a first direction (F1) and the plurality of pull rods (301) arranged along a second direction (F2) perpendicular to the first direction (F1).

5. The sampling and detection device according to claim 4, characterized in that, It also includes a connector (305) that forms the grip (303) and connects to the other end of the plurality of pull rods (301).

6. The sampling and detection device according to claim 1, characterized in that, The main body (10) has a first limiting part and a second limiting part, the first limiting part and the second limiting part are arranged at a distance from each other along the movement direction of the piston assembly (30), the piston assembly (30) has a third limiting part and a fourth limiting part, the third limiting part and the fourth limiting part are arranged at a distance from each other along the movement direction of the piston assembly (30), the first limiting part can cooperate with the third limiting part to limit the first extreme movement position of the piston assembly (30), and the second limiting part can cooperate with the fourth limiting part to limit the second extreme movement position of the piston assembly (30).

7. The sampling and detection device according to any one of claims 1-6, characterized in that, The main body (10) has a partition (103) that separates the receiving cavity (102) to form a first chamber (104) and a second chamber (105). The piston assembly (30) is disposed in the first chamber (104), and the detection element (20) is at least partially disposed in the second chamber (105). The first chamber (104) and the second chamber (105) are connected by a connecting hole (1031).

8. The sampling and detection device according to claim 7, characterized in that, One end of the detection element (20) passes through the connecting hole (1031) and extends into the first chamber (104).

9. The sampling and detection device according to claim 8, characterized in that, One end of the detection element (20) is press-fitted with the connecting hole (1031).

10. The sampling and detection device according to claim 7, characterized in that, The first chamber (104) includes a first part (1041) and a second part (1042). The first part (1041) is provided with the piston assembly (30). The second part (1042) is located between the suction port (101) and the first part (1041). The cross-sectional size of the second part (1042) gradually decreases along the direction close to the suction port (101).

11. The sampling and detection device according to claim 1, characterized in that, A one-way valve is provided at the suction port (101), and the one-way valve is unidirectionally open in the direction from the suction port (101) to the receiving cavity (102).

12. The sampling and detection device according to claim 7, characterized in that, The main body (10) includes a first housing (106) and a second housing (107) that overlap each other, the first housing (106) and the second housing (107) defining the receiving cavity (102), and at least one of the first housing (106) and the second housing (107) is provided with the partition (103).

13. The sampling and detection device according to claim 1, characterized in that, The detection element (20) is an immunochromatographic detection element, and the main body (10) has an observation window (108) which is correspondingly set to the result display area of ​​the immunochromatographic detection element.

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