Liquid extraction and detection device

Abstract

The utility model discloses a liquid extraction and detection device, which belongs to the technical field of liquid detection and comprises a kit, a liquid inlet track, a liquid outlet track and a liquid outlet track. The sampling part is at least partially connected to the kit in a sliding mode in the length direction of the kit, the sampling part is provided with a first point position, a second point position and a third point position relative to the kit, and the sampling part is further provided with an absorption part used for absorbing liquid; when the sampling part moves from the first point position to the third point position, the sampling part slides relative to the kit, and the absorbing part is in contact with the inlet end of the inlet track and is extruded, so that the sample liquid moves to the detection element from the inlet track. The sampling part is moved from the first point position to the third point position, and the inlet track of the self structure of the kit is utilized, so that the extrusion of the absorbing piece and the transfer of the sample liquid can be directly realized, the sample can quickly reach the detection element to be detected, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid detection, in particular to a liquid extraction and detection device. Background Art

[0002] In many fields such as medical diagnosis, food safety testing, and environmental monitoring, accurate and convenient testing of liquid samples is crucial.

[0003] In early detection technologies, sample collection and testing were often separated. Sample collection required specialized tools, such as pipettes and cotton swabs, making the process cumbersome and susceptible to environmental contamination. Furthermore, the structural design of traditional detection devices was not rational, and the sample transfer process was complex. After sample collection, it needed to be manually transferred to the testing equipment or device, which not only increased the operator's workload but also made it prone to spillage during sample transfer.

[0004] Therefore, a liquid extraction and detection device that can solve the above problems is needed. Utility Model Content

[0005] The embodiment of the present utility model provides a liquid extraction and detection device to solve the problems in the prior art.

[0006] The present invention adopts the following technical solution: a liquid extraction detection device, comprising: a reagent cartridge, an internal cavity of which is provided with a detection element for testing a sample liquid, and the reagent cartridge further having a liquid inlet track connected to the internal cavity; a sampling portion, at least partially slidably connected to the reagent cartridge along a length direction of the reagent cartridge, the sampling portion having a first position, a second position, and a third position relative to the reagent cartridge, and the sampling portion further having an absorbent member for absorbing liquid; when the sampling portion is at the first position, the absorbent member is completely disposed in a gap between the sampling portion and the reagent cartridge, and the sampling portion and / or the absorbent member completely cover the inlet track; when the sampling portion moves from the first position to the second position, the sampling portion slides relative to the reagent cartridge so that the absorbent member is at least partially exposed outside the sampling portion; when the sampling portion moves from the first position to the third position, the sampling portion slides relative to the reagent cartridge, and the absorbent member contacts and is squeezed by the entrance end of the inlet track, causing the sample liquid to move from the inlet track to the detection element.

[0007] Preferably, the reagent box has a first plane and a second plane, the first plane and the second plane are connected by a slope, the entrance track is located on the slope, the slope surface is composed of multiple slopes, the multiple slopes are the entry ends of the entrance track, and the multiple slopes are inclined inward to point to the interior of the entrance track; when the sampling part is at the first point position, the absorbent is facing the first plane and / or the slope; when the sampling part moves from the first point position to the third point position, the absorbent is squeezed by the slope so that the sample liquid on the absorbent flows to the entrance track via the multiple slopes.

[0008] Preferably, the reagent kit is provided with a first limiting portion, the sampling portion is provided with a locking groove, and a first chamfered surface located at the end of the sampling portion; when the sampling portion is at the first position, the first limiting portion is embedded in the locking groove; when the sampling portion moves from the second position to the first position, the first chamfered surface of the sampling portion contacts and squeezes the first limiting portion, so that the first limiting portion passes over the first chamfered surface and is embedded in the locking groove.

[0009] Preferably, a second limiting portion is further provided on the reagent box, and a second chamfered surface is provided on the side of the locking groove; when the sampling portion moves from the first point position to the third point position, the first limiting portion first contacts and squeezes the second chamfered surface to disengage from the locking groove, and then the first chamfered surface contacts and squeezes the second limiting portion, so that the second limiting portion passes over the first chamfered surface and is embedded in the locking groove.

[0010] Preferably, the sampling portion is provided with two oppositely arranged elastic arms, each elastic arm has a first limiting wall, and the reagent box is provided with two slide grooves extending along its length direction, and each slide groove penetrates into the internal cavity of the reagent box; the two elastic arms respectively penetrate into the two slide grooves and are at least partially embedded in the internal cavity of the reagent box, so that the first limiting wall is against the internal cavity of the reagent box and is located on the wall surface of the slide groove side.

[0011] Preferably, one end portion of the chute is configured as a second limiting wall; when the sampling portion is at the second position, the elastic arm abuts against the second limiting wall.

[0012] Preferably, a blocking block is further provided on the second plane, the blocking block having an opening, and the opening is located at the top of the slope; when the sampling portion is at the third point, the absorbent is at least partially placed in the blocking block and against the second plane.

[0013] Preferably, the sampling portion is not higher than the outer surface of the reagent kit.

[0014] Preferably, the reagent kit is further provided with an observation window communicating with the internal cavity thereof, and the observation window faces the portion of the detection element that displays the test results.

[0015] Preferably, the detection element is configured as an immunochromatographic test paper; and the absorbent is configured as absorbent cotton.

[0016] At least one of the above technical solutions adopted in the embodiment of the present utility model can achieve the following beneficial effects:

[0017] During the transportation or non-use stage of the liquid extraction and detection device, the design of the first point can provide reliable protection for the absorbent and reduce the contamination of the absorbent by external factors, thereby ensuring the reliability and accuracy of the test results. In addition, the sampling part can slide between different points, and the conversion from the protection state to the sampling state and then to the detection state is simple, allowing users to easily complete the sample collection and detection process. The setting of the second point allows the sampling part to be extended, making it convenient to obtain sample liquid in different scenarios, increasing the flexibility and convenience of sampling. By moving the sampling part from the first point to the third point, the entrance track of the test kit's own structure can be used to directly realize the squeezing of the absorbent and the transfer of the sample liquid, so that the sample can quickly reach the detection element for detection, thereby improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the sampling portion of the present invention when it is at the first position;

[0020] Figure 2 This is a cross-sectional view of the sampling portion of the utility model at the first point Figure 1 ;

[0021] Figure 3 This is a cross-sectional view of the sampling portion of the utility model at the first point Figure 2 ;

[0022] Figure 4 An exploded view of the test kit and sampling unit of the utility model;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the sampling portion of the present invention when it is at the second position;

[0024] Figure 6 This is a sectional view of the three-dimensional structure of the sampling portion of the present invention at the third position;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the test kit of the utility model.

[0026] Reference numerals

[0027] 1-reagent box; 11-detection element; 12-first plane; 13-second plane; 131-enclosing block; 14-slope; 141-entrance track; 142-slope; 15-first limiting part; 16-second limiting part; 17-slide; 18-second limiting wall; 19-observation window; 2-sampling part; 21-absorber; 22-locking groove; 23-first chamfered surface; 24-second chamfered surface; 25-elastic arm; 251-first limiting wall. DETAILED DESCRIPTION

[0028] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0029] The technical solutions provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] Reference Figures 1 to 7 As shown, an embodiment of the present invention provides a liquid extraction detection device, which mainly includes a reagent kit 1 and a sampling portion 2. A detection element 11 is provided in the internal cavity of the reagent kit 1 for testing the sample liquid (the detection element 11 is generally configured as an immunochromatographic test paper, which is a prior art and will not be described in detail here), and the reagent kit 1 also has a liquid inlet track 141 connected to its internal cavity. At least a portion of the sampling portion 2 is slidably connected to the reagent kit 1 along the length direction of the reagent kit 1, and the sampling portion 2 has a first point position, a second point position and a third point position relative to the reagent kit 1. The sampling portion 2 is also provided with an absorbent 21 for absorbing liquid (the absorbent 21 is generally configured as absorbent cotton or other absorbent material).

[0031] When the sampling portion 2 is at the first position (such as Figure 1 and Figure 2 ), the absorbent 21 is completely placed in the gap between the sampling portion 2 and the reagent box 1, and the sampling portion 2 and / or the absorbent 21 completely cover the inlet track 141; when the sampling portion 2 moves from the first point to the second point (such as Figure 5 , being the second position), the sampling portion 2 slides relative to the reagent box 1 so that the absorbent 21 is at least partially exposed outside the sampling portion 2; when the sampling portion 2 moves from the first position to the third position (such as Figure 6 , being the third point), the sampling portion 2 slides relative to the reagent kit 1 , and the absorber 21 contacts the entrance end of the inlet track 141 and is squeezed, so that the sample liquid moves from the inlet track 141 to the detection element 11 .

[0032] The working process of the liquid extraction and detection device is mainly divided into three stages: protection, sampling and detection.

[0033] Protection stage: During transport or when not in use, the sampling portion 2 is in the first position, and the absorbent 21 is at least partially contained in the gap between the sampling portion 2 and the reagent cartridge 1. In this state, the absorbent 21 is in a relatively isolated and closed environment, effectively preventing it from external contamination and ensuring the accuracy of subsequent tests performed by the absorbent 21.

[0034] Sampling Stage: When a sample is collected, the sampling portion 2 is moved from the first position to the second position. During this process, the sampling portion 2 slides relative to the reagent cartridge 1, exposing at least a portion of the absorbent member 21 outside the sampling portion 2. This means that the absorbent member 21 extends relative to the reagent cartridge 1. The exposed absorbent member 21 (e.g., absorbent cotton) can now be used to absorb the sample liquid to be tested, such as saliva or urine. Saliva testing can be used for viral and nucleic acid testing, while urine can be used for other tests, such as pregnancy testing.

[0035] Testing Phase: After sample collection is complete, the sampling unit 2 is moved from the second position to the first position and retracted. The sampling unit 2 is then moved from the first position to the third position. During this movement, the absorber 21 contacts and is squeezed by the inlet track 141 on the reagent cartridge 1. Because the sample liquid is adsorbed by the absorber 21, the squeezing action forces the sample liquid out of the absorber 21. The sample liquid then passes through the inlet track 141 and enters the detection element 11 (immunochromatographic test strip) in the internal cavity of the reagent cartridge 1. The detection element 11 then performs a corresponding test on the sample liquid.

[0036] In summary, in this embodiment, the design of the first point position of the liquid extraction detection device can provide reliable protection for the absorbent 21 during transportation or non-use, reduce the contamination of the absorbent 21 by external factors, and thus ensure the reliability and accuracy of the detection results. In addition, the sampling portion 2 can slide between different points, and the conversion operation from the protection state to the sampling state and then to the detection state is simple, and the user can easily complete the sample collection and detection process. The setting of the second point position allows the sampling portion 2 to be extended, which is convenient for obtaining sample liquid in different scenarios, increasing the flexibility and convenience of sampling. By moving the sampling portion 2 from the first point position to the third point position, the inlet track 141 of the test kit 1 itself can be used to directly realize the squeezing of the absorbent 21 and the transfer of the sample liquid, so that the sample can quickly reach the detection element 11 for detection, thereby improving the detection efficiency.

[0037] In some practical applications, refer to Figure 2 、 Figures 6 and 7As shown, the reagent box 1 has a first plane 12 and a second plane 13, which are connected by a slope 14. The inlet track 141 is located on the slope 14. The surface of the slope 14 is composed of multiple inclined surfaces 142. The multiple inclined surfaces 142 are the entry ends of the inlet track 141, and the multiple inclined surfaces 142 are inclined inwardly pointing to the interior of the inlet track 141; when the sampling part 2 is in the first position, the absorbent 21 is opposite to the first plane 12 and / or the slope 14; when the sampling part 2 moves from the first position to the third position, the absorbent 21 is squeezed by the inclined surfaces 142 on the slope 14 so that the sample liquid on the absorbent 21 flows into the interior of the inlet track 141 through the inclined surfaces 142.

[0038] When the sampling portion 2 moves from the first position to the third position, the absorber 21 is squeezed by the entrance end of the inlet track 141, which is formed by the multiple inclined surfaces 142 on the slope 14. Because the multiple inclined surfaces 142 are inclined inward and point toward the interior of the inlet track 141, when the absorber 21 is squeezed, the sample liquid is guided by these inclined surfaces 142 and can flow more smoothly into the interior of the inlet track 141, thereby reaching the detection element 11 (immunochromatographic test strip) in the internal cavity of the reagent cartridge 1 for detection. The multiple inwardly inclined inclined surfaces 142 on the slope 14, which form the entrance end of the inlet track 141, effectively guide the liquid. When the absorber 21 is squeezed, the inclined surfaces 142 can accurately direct the sample liquid into the inlet track 141. In addition, the design of the first plane 12, the second plane 13, and the slope 14 facilitates the squeezing operation of the absorber 21 and provides a smooth channel for the flow of the sample liquid.

[0039] In some practical applications, refer to Figure 4 As shown, the reagent box 1 is provided with a first limiting portion 15, and the sampling portion 2 is provided with a locking groove 22 and a first chamfered surface 23 located at the end of the sampling portion 2; when the sampling portion 2 moves from the second point position to the first point position, the first chamfered surface 23 of the sampling portion 2 contacts and squeezes the first limiting portion 15, so that the first limiting portion 15 passes over the first chamfered surface 23 and is embedded in the locking groove 22; similarly, when the sampling portion 2 is to be moved from the first point position to the second point position, it is necessary to push the sampling portion 2 so that the first limiting portion 15 is disengaged from the locking groove 22; generally speaking, the side of the locking groove 22 is also provided with a chamfered surface to facilitate the first limiting portion 15 to disengage from the locking groove 22.

[0040] Specifically, the reagent kit 1 is further provided with a second limiting portion 16, and a second chamfered surface 24 is provided on the side of the locking groove 22; when the sampling portion 2 moves from the first point position to the third point position, the first limiting portion 15 first contacts and squeezes the second chamfered surface 24 to disengage from the locking groove 22, and then the first chamfered surface 23 contacts and squeezes the second limiting portion 16, so that the second limiting portion 16 passes over the first chamfered surface 23 and is embedded in the locking groove 22.

[0041] To sum up, the cooperation between the first limiting portion 15 and the second limiting portion 16 and the locking groove 22 enables the sampling portion 2 to be accurately locked at the first position and the third position, thereby ensuring the stability of the device at all stages; it should be noted that the side edges of the first limiting portion 15 and the second limiting portion 16 can also be provided with chamfered surfaces to facilitate the first limiting portion 15 or the second limiting portion 16 to disengage from the locking groove 22.

[0042] In some practical applications, the relative sliding between the sampling portion 2 and the reagent box 1 can be achieved in the following manner: Figures 2 to 4 As shown, the sampling portion 2 is provided with two oppositely arranged elastic arms 25, each elastic arm 25 has a first limiting wall 251, and the reagent box 1 is provided with two slide grooves 17 extending along its length direction, and each slide groove 17 passes through the internal cavity of the reagent box 1; the two elastic arms 25 respectively penetrate the two slide grooves 17 and are at least partially embedded in the internal cavity of the reagent box 1, so that the first limiting wall 251 is against the internal cavity of the reagent box 1 and is located on the wall surface on the side of the slide groove 17.

[0043] When installing the sampling unit 2, align the two oppositely disposed elastic arms 25 on the sampling unit 2 with the two chutes 17 on the reagent box 1, and then press down firmly. Due to the elasticity of the elastic arms 25, they will deform slightly during the pressing process, allowing them to smoothly penetrate the chutes 17 and at least partially embed themselves in the internal cavity of the reagent box 1. The first limiting wall 251 then abuts against the wall of the internal cavity of the reagent box 1 located on the side of the chutes 17 to limit the position of the sampling unit 2, completing the assembly of the sampling unit 2 and the reagent box 1. In this case, the sampling unit 2 can be prevented from detaching from the reagent box 1 while ensuring that the sampling unit 2 can slide along the length of the reagent box 1.

[0044] Therefore, the sampling unit 2 and the reagent box 1 can be assembled by simply aligning the elastic arm 25 with the chute 17 and pressing it, without the need for complicated tools and operating steps, thus reducing the difficulty of assembly. At the same time, the first limiting wall 251 abuts against the wall surface of the chute 17 side of the cavity inside the reagent box 1, providing stable support and guidance for the sliding of the sampling unit 2.

[0045] Furthermore, one end of the slide groove 17 is configured as a second limiting wall 18; when the sampling part 2 is at the second point position, the elastic arm 25 rests on the second limiting wall 18, and the second limiting wall 18 limits the sampling part 2, indicating that the sampling part 2 has been extended to the longest position.

[0046] In some practical applications, based on any of the above embodiments: a blocking block 131 (such as Figure 6 and Figure 7 ), the enclosure block 131 has an opening, and the opening is located at the top of the slope 14; when the sampling portion 2 is at the third point, the absorbent 21 is at least partially placed in the enclosure block 131 and against the second plane 13.

[0047] The opening of the enclosure block 131 is located at the top of the slope 14. When the absorber 21 is against the second plane 13 at the third point and is within the enclosure block 131, the enclosure block 131 surrounds the absorber 21, preventing the sample liquid from overflowing to the outside of the device and keeping the detection environment clean. Even if a small amount of sample liquid overflows, it will flow from the opening of the enclosure block 131 to the slope 14, ensuring that the sample liquid can continuously and stably flow into the inlet track 141.

[0048] In some practical applications, the sampling portion 2 is no higher than the outer surface of the reagent kit 1. This design primarily enhances the integrity and compactness of the overall liquid extraction and detection device. This design, in which the sampling portion is no higher than the outer surface of the reagent kit 1, gives the entire liquid extraction and detection device a more regular appearance, improving the product's aesthetics. It also effectively reduces the device's overall size and footprint, making it more compact and lightweight.

[0049] Generally speaking, the reagent kit 1 is further provided with an observation window 19 communicating with the internal cavity thereof, and the observation window 19 faces the portion of the detection element 11 that displays the test results.

[0050] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A liquid extraction and detection device, characterized in that: include: A test kit (1) having a detection element (11) disposed in its internal cavity for testing a sample liquid, and the test kit (1) also having a liquid inlet track (141) connected to the internal cavity; A sampling portion (2), at least part of which is slidably connected to the reagent box (1) along the length direction of the reagent box (1), and the sampling portion (2) has a first point position, a second point position, and a third point position relative to the reagent box (1), and the sampling portion (2) is also provided with an absorbent (21) for absorbing liquid; When the sampling portion (2) is at the first position, the absorbent (21) is completely placed in the gap between the sampling portion (2) and the reagent box (1), and the sampling portion (2) and / or the absorbent (21) completely cover the inlet track (141); when the sampling portion (2) moves from the first position to the second position, the sampling portion (2) slides relative to the reagent box (1), so that the absorbent (21) is at least partially exposed outside the sampling portion (2); when the sampling portion (2) moves from the first position to the third position, the sampling portion (2) slides relative to the reagent box (1), and the absorbent (21) contacts the entrance end of the inlet track (141) and is squeezed, so that the sample liquid moves from the inlet track (141) to the detection element (11).

2. A liquid extraction and detection device according to claim 1, characterized in that: The reagent box (1) has a first plane (12) and a second plane (13), the first plane (12) and the second plane (13) are connected by a slope (14), the entrance track (141) is located on the slope (14), the surface of the slope (14) is composed of a plurality of inclined surfaces (142), the plurality of inclined surfaces (142) are the entrance ends of the entrance track (141), and the plurality of inclined surfaces (142) are inclined inwardly pointing to the interior of the entrance track (141); When the sampling portion (2) is at a first position, the absorbent (21) faces the first plane (12) and / or the slope (14); when the sampling portion (2) moves from the first position to a third position, the absorbent (21) is squeezed by the slope (14) so ​​that the sample liquid on the absorbent (21) flows toward the inlet track (141) via the plurality of slopes (142).

3. The liquid extraction and detection device according to claim 1, characterized in that: The reagent box (1) is provided with a first limiting portion (15), and the sampling portion (2) is provided with a locking groove (22) and a first chamfered surface (23) located at the end of the sampling portion (2); when the sampling portion (2) is at a first position, the first limiting portion (15) is embedded in the locking groove (22); when the sampling portion (2) moves from a second position to a first position, the first chamfered surface (23) of the sampling portion (2) contacts and presses the first limiting portion (15), so that the first limiting portion (15) passes over the first chamfered surface (23) and is embedded in the locking groove (22).

4. The liquid extraction and detection device according to claim 3, characterized in that: The reagent box (1) is further provided with a second limiting portion (16), and a second chamfered surface (24) is provided on the side of the locking groove (22); when the sampling portion (2) moves from the first position to the third position, the first limiting portion (15) first contacts and presses the second chamfered surface (24) to disengage from the locking groove (22), and then the first chamfered surface (23) contacts and presses the second limiting portion (16), so that the second limiting portion (16) passes over the first chamfered surface (23) and is embedded in the locking groove (22).

5. The liquid extraction and detection device according to claim 1, characterized in that: The sampling portion (2) is provided with two elastic arms (25) arranged opposite to each other, each elastic arm (25) having a first limiting wall (251), and the reagent box (1) is provided with two slide grooves (17) extending along its length direction, and each slide groove (17) penetrates into the internal cavity of the reagent box (1); the two elastic arms (25) respectively penetrate into the two slide grooves (17) and are at least partially embedded in the internal cavity of the reagent box (1), so that the first limiting wall (251) abuts against the internal cavity of the reagent box (1) and is located on the wall surface of the slide groove (17) side.

6. The liquid extraction and detection device according to claim 5, characterized in that: One end portion of the slide groove (17) is configured as a second limiting wall (18); when the sampling portion (2) is at the second position, the elastic arm (25) abuts against the second limiting wall (18).

7. The liquid extraction and detection device according to claim 2, characterized in that: A blocking block (131) is further provided on the second plane (13), the blocking block (131) having an opening, and the opening is located at the top of the slope (14); when the sampling portion (2) is at the third point, the absorbent (21) is at least partially placed in the blocking block (131) and abuts against the second plane (13).

8. The liquid extraction and detection device according to claim 1, characterized in that: The sampling portion (2) is not higher than the outer surface of the reagent box (1).

9. The liquid extraction and detection device according to claim 1, characterized in that: The reagent kit (1) is also provided with an observation window (19) communicating with the internal cavity thereof, and the observation window (19) is directly opposite to the portion of the detection element (11) that displays the test results.

10. The liquid extraction and detection device according to claim 1, characterized in that: The detection element (11) is configured as an immunochromatographic test paper; and the absorbent (21) is configured as absorbent cotton.

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