CN219122221U

CN219122221U - Detection reagent card capable of preventing excessive sample addition

Info

Publication number: CN219122221U
Application number: CN202223378171.7U
Authority: CN
Inventors: 徐敏; 邓石明
Original assignee: Foshan Yuyang Medical Instrument Co ltd
Current assignee: Foshan Yuyang Medical Instrument Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-06-02
Anticipated expiration: 2032-12-16

Abstract

The utility model discloses a detection reagent card for preventing excessive sample addition, which comprises an upper shell and a lower shell, wherein the top surface of the lower shell is formed into an accommodating space in a surrounding way, at least one supporting block for supporting test paper and a positioning part for positioning and limiting the end part of the test paper are convexly arranged on the bottom surface of the accommodating space, and the upper shell is provided with a collecting window and an observation window which are communicated with the accommodating space; the support block is provided with a bevel guide surface which extends to the bottom surface of the accommodating space in an inclined way at one end close to the collecting window, the positioning part is adjacent to one side of the bevel guide surface, and a concave space is formed between the positioning part and the bevel guide surface in an enclosing way; the bottom surface of the accommodating space is also convexly provided with a water blocking part, the water blocking part is formed into a liquid collecting space arranged at the periphery of the concave space in a surrounding manner, and the positioning part is provided with a liquid guide port used for communicating the concave space and the liquid collecting space; the liquid of the sample is prevented from directly penetrating into the reaction part of the test paper, the purposes of controlling the penetration speed and uniformly penetrating are achieved, and the chromatographic effect of the test paper is improved.

Description

Detection reagent card capable of preventing excessive sample addition

Technical Field

The utility model relates to the technical field of detection card structures, in particular to a detection reagent card capable of preventing excessive sample addition.

Background

The reagent detection card is generally used in the sampling conditions of drugs, viruses, blood and the like due to the portability and the rapid detection of the reagent detection card, and mainly comprises an upper shell, a lower shell and detection test paper arranged in the inner cavities of the upper shell and the lower shell, wherein the upper shell is provided with a collection window and an observation window, an operator drops quantitative sample liquid into the collection window and falls on the test paper, and the observation window is used for the operator to observe the detection result of the test paper.

Secondly, the dropping amount of the sample liquid has a great influence on the accuracy of the detection result of the test paper, wherein if the dropping amount of the sample liquid is too small, the test paper is insufficient in absorption amount, incomplete reaction occurs, and the detection result is inaccurate. The absorption rate of the test paper to the sample liquid is limited, if the dropping amount of the sample liquid is too large, the excessive sample liquid can directly permeate the reaction part of the test paper, the permeation speed is too high, the permeation amount is too large, and the result is inaccurate.

To solve this problem, in CN211905380U, CN115372346a, a slope is provided at a supporting block for receiving test paper to guide the flow, and a liquid storage space is formed by a stopper of fiber at the end of test paper, so that the sample liquid is guided into the liquid storage space along the slope. However, the liquid storage space is limited by the size of the limiting block, and the limiting block is used as the positioning function of the end part of the test paper, so that the structural size of the test paper is not necessarily too large, and the liquid storage space is very small. For general people who do not have professional training, the dropping amount of the test paper is often far greater than the volume amount of the liquid storage space, so that excessive sample liquid is caused to overflow or directly permeate into the reaction part of the test paper, and the effect of energy storage and buffering is lost.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a detection reagent card for preventing excessive sample addition, which can effectively improve the chromatographic effect of test paper and ensure the reliability of sampling detection.

In order to achieve the above purpose, the detection reagent card for preventing excessive sample addition provided by the utility model comprises an upper shell and a lower shell which are spliced together, wherein the top surface of the lower shell is formed into a containing space in a surrounding mode, the bottom surface of the containing space is convexly provided with at least one supporting block for supporting test paper and a positioning part for positioning and limiting the end part of the test paper, and the upper shell is provided with a collecting window and an observation window which are communicated with the containing space; the support block is provided with a bevel guide surface which extends to the bottom surface of the accommodating space in an inclined way at one end close to the collecting window, the positioning part is adjacent to one side of the bevel guide surface, and a concave space is formed between the positioning part and the bevel guide surface in an enclosing way;

the bottom surface of the accommodating space is also convexly provided with a water blocking part, the water blocking part is in surrounding configuration to form a liquid collecting space arranged at the periphery of the concave space, and the positioning part is provided with a liquid guide port used for communicating the concave space and the liquid collecting space.

Further, the inner side wall at one side of the lower shell is also used as a part of water retaining part, and a liquid collecting space is formed by surrounding the water retaining part and the inner side wall of the lower shell.

Further, the volume ratio between the liquid collecting space and the concave space is at least 10:1.

Further, the level of the collecting space completely covers the collecting window.

Further, the positioning part is U-shaped, and the height of the positioning part is higher than that of the supporting block.

Further, a diversion trench communicated with the collecting window is concavely arranged on the bottom surface of the upper shell, wherein the diversion trench is adjacent to one side of the inclined guide surface.

Further, the bottom surface of the upper shell is convexly provided with a pressing block aligned to the concave space, and the pressing block is used for pressing the test paper downwards to the concave space.

The utility model adopts the scheme, and has the beneficial effects that: 1) The concave space is formed by surrounding between the positioning part and the inclined guide surface, so that the sample liquid is guided to flow into the concave space, the sample liquid is prevented from directly penetrating into the reaction part of the test paper, the purposes of controlling the penetration speed and uniformly penetrating are achieved, and the chromatographic effect of the test paper is improved; 2) The water retaining part is formed into a liquid collecting space arranged at the periphery of the concave space and a liquid guide port communicated with the concave space and the liquid collecting space, so that excessive sample liquid can flow into the liquid collecting space through the liquid guide port, the capacity of liquid storage buffer is greatly improved, the problem that the volume of the concave space 24 is too small is effectively solved, the chromatographic effect of the test paper is further ensured, and finally the stability and reliability of the detection result are ensured.

Drawings

FIG. 1 is a schematic diagram of a reagent card.

FIG. 2 is an exploded schematic view of a reagent card.

Fig. 3 is a cross-sectional view of a reagent card.

Fig. 4 is an enlarged view of a portion a in fig. 3.

The device comprises a 1-upper shell, a 11-collecting window, a 12-observation window, a 13-diversion trench, a 14-pressing block, a 2-lower shell, a 21-accommodating space, a 22-supporting block, a 221-inclined guide surface, a 23-positioning part, a 231-liquid guiding port, a 24-concave space, a 25-water retaining part, a 26-liquid collecting space and 3-test paper.

Detailed Description

In order that the utility model may be understood more fully, the utility model will be described with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1, in this embodiment, an excessive sample loading prevention detection reagent card includes an upper housing 1 and a lower housing 2 that are spliced together, where a preset clamping column and a clamping slot phase between the upper housing 1 and the lower housing 2 are clamped, and a positioning column and a positioning hole are matched in a plugging manner, so that the two are matched in a splicing manner, and as the splicing manner belongs to a conventional technical means, a person skilled in the art can adopt a mutually derived splicing manner, and a redundant description is not expanded here.

Referring to fig. 2 and 3, in the present embodiment, the top surface of the lower housing 2 is formed with a receiving space 21, and the bottom surface of the receiving space 21 is provided with at least one supporting block 22 for supporting the test paper 3 and a positioning portion 23 for positioning the end of the test paper 3, wherein the supporting block 22 and the positioning portion 23 are both in a convex structure and are both higher than the bottom surface of the receiving space 21. The upper case 1 is provided with a collection window 11 and an observation window 12 communicating with the accommodation space 21, wherein the collection window 11 and the observation window 12 of the present embodiment are sequentially arranged along a center line of the upper case 1 in the length direction. The operator drops the sample liquid onto the test paper 3 by dropping the sample liquid onto the collection window 11, and the observation window 12 allows the operator to observe the chromatographic detection result of the test paper 3.

Specifically, the supporting block 22 of the embodiment extends along a middle line of the lower housing 2 in the length direction to form a strip-shaped protruding structure, wherein the preset test paper 3 is laid on the supporting block 22, and the bottom surface of the upper housing 1 is matched with the supporting block 22 to clamp the test paper 3 together; the support block 22 has a sloped guide surface 221 formed at one end near the collection window 11 and extending obliquely to the bottom surface of the accommodation space 21, and one end portion of the test paper 3 is placed at the sloped guide surface 221 so as to guide the obliquely downward flow of the sample liquid by the sloped guide surface 221. Secondly, the positioning part 23 is adjacent to one side of the inclined guide surface 221, the positioning part 23 is in a reverse U-shaped structure, the protruding structure is higher than the bottom surface of the accommodating space 21, and one end of the test paper 3 paved on the supporting block 22 is embedded in the positioning part 23, so that the positioning limiting effect on the end part of the test paper 3 is achieved, and the displacement is effectively prevented; the height of the positioning portion 23 is higher than the height of the supporting block 22 to ensure that the positioning block can restrict the end of the test paper 3. In addition, a concave space 24 is formed between the positioning portion 23 and the inclined guide surface 221. Therefore, when the sample liquid is added from the collection window 11 to the test paper 3, the test paper 3 at this time is suspended in the concave space 24, the test paper 3 can sink into the concave space 24 after the sample liquid is absorbed, and a small amount of non-absorbed sample liquid tends to flow along the inclined guide surface 221 to the concave space 24 and accumulate in the concave space 24, so that the sample liquid of this part is prevented from directly penetrating into the reaction part of the test paper 3, the purposes of controlling the penetration speed and uniformly penetrating are achieved, and the chromatographic effect of the test paper 3 is improved.

Referring to fig. 2-4, in the present embodiment, when the amount of the added sample liquid is too large and exceeds the maximum capacity of the concave space 24, the concave space 24 alone is insufficient to accumulate the sample liquid, so that the sample liquid is diffused or permeated too quickly to the reaction site of the test paper 3, and the like, thereby, the water blocking portion 25 is further protruded on the bottom surface of the accommodating space 21 in the present embodiment, wherein the water blocking portion 25 is in a protruded structure and is higher than the bottom surface of the accommodating space 21. A liquid collecting space 26 arranged at the periphery of the depressed space 24 is formed by surrounding the water blocking portion 25; next, the positioning portion 23 is provided with a liquid guide opening 231 for communicating the concave space 24 and the liquid collecting space 26, whereby the excessive sample liquid accumulated in the concave space 24 can flow to the liquid collecting space 26 through the liquid guide opening 231, and the purpose of liquid diversion is achieved, so that the excessive sample liquid is effectively prevented from accumulating in the concave space 24.

Further, the liquid guide opening 231 of the present embodiment faces the inclined guide surface 221, so that when the excessive sample liquid flows along the inclined guide surface 221 to the concave space 24, the excessive sample liquid can directly flow into the liquid collecting space 26 through the liquid guide opening 231, thereby accelerating the liquid diversion efficiency.

Further, to reduce the production difficulty and the cost of mold development, the inner side wall of the lower housing 2 side of the present embodiment may also be used as a part of the water blocking portion 25, and the water blocking portion 25 and the inner side wall of the lower housing 2 are configured to form the liquid collecting space 26, wherein the water blocking portion 25 is perpendicular to the length direction of the lower housing 2 and is located at the opposite position between the collecting window 11 and the observation window 12, and the water blocking portion 25 and the liquid collecting space 26 are used to block and accumulate excessive sample liquid.

In this embodiment, the volume ratio between the liquid collecting space 26 and the concave space 24 is at least 10:1, so that the liquid collecting space 26 can fully accumulate excessive sample liquid, the purposes of controlling the permeation speed and uniformly permeating are further ensured, and the chromatographic effect of the test paper 3 is ensured to be more stable.

In order to facilitate the sample liquid to flow along the inclined guide surface 221 more smoothly, the bottom surface of the housing of the present embodiment is concavely provided with a flow guiding groove 13 communicating with the collection window 11, wherein the flow guiding groove 13 is located adjacent to one side of the inclined guide surface 221. Thus, when an excessive amount of sample liquid is added from the collection window 11, the sample liquid absorbed by the test paper 3 is not likely to be guided to the concave space 24 and the liquid collecting space 26 via the guide groove 13 and the inclined guide surface 221, and the problem that the excessive sample liquid accumulates in the collection window 11 is further avoided.

Referring to fig. 4, in order to enable the end of the test paper 3 to be placed in the positioning portion 23 and the concave space 24, the bottom surface of the upper housing 1 of the present embodiment is convexly provided with a pressing block 14 aligned to the concave space 24, so that the test paper 3 is pressed downward to the concave space 24 by the pressing block 14, thereby being more convenient for guiding the sample liquid to flow into the concave space 24.

The above-described embodiments are merely preferred embodiments of the present utility model, and are not intended to limit the present utility model in any way. Any person skilled in the art, using the disclosure above, may make many more possible variations and modifications of the technical solution of the present utility model, or make many more modifications of the equivalent embodiments of the present utility model without departing from the scope of the technical solution of the present utility model. Therefore, all equivalent changes made according to the inventive concept are covered by the protection scope of the utility model without departing from the technical scheme of the utility model.

Claims

1. The utility model provides a prevent excessive detection reagent card of application of sample, includes upper casing (1) and lower casing (2) that splice together, the top surface of lower casing (2) encloses the configuration and is formed with accommodation space (21), the bottom surface of accommodation space (21) epirelief is equipped with at least one supporting shoe (22) that are used for bearing test paper (3) and is used for location restriction test paper (3) tip location portion (23), upper casing (1) are equipped with collection window (11) and observation window (12) that communicate with each other with accommodation space (21); the supporting block (22) is provided with a bevel guide surface (221) which extends to the bottom surface of the accommodating space (21) in an inclined way at one end close to the collecting window (11), the positioning part (23) is adjacent to one side of the bevel guide surface (221), and a concave space (24) is formed between the positioning part (23) and the bevel guide surface (221) in an enclosing way;

the method is characterized in that:

the bottom surface of the accommodating space (21) is also convexly provided with a water blocking part (25), the water blocking part (25) is in a surrounding configuration to form a liquid collecting space (26) arranged at the periphery of the concave space (24), and the positioning part (23) is provided with a liquid guide opening (231) for communicating the concave space (24) and the liquid collecting space (26).

2. The anti-overstock test reagent card of claim 1, wherein: the inner side wall at one side of the lower shell (2) is also used as a part of water blocking part (25), and a liquid collecting space (26) is formed by the water blocking part (25) and the inner side wall of the lower shell (2).

3. The anti-overstock test reagent card of claim 1, wherein: the volume ratio between the liquid collecting space (26) and the concave space (24) is at least 10:1.

4. The anti-overstock test reagent card of claim 1, wherein: the level of the collecting space (26) completely covers the collecting window (11).

5. The anti-overstock test reagent card of claim 1, wherein: the positioning part (23) is U-shaped, and the height of the positioning part (23) is higher than that of the supporting block (22).

6. The anti-overstock test reagent card of claim 1, wherein: the bottom surface of the upper shell (1) is concavely provided with a diversion trench (13) communicated with the collection window (11), wherein the diversion trench (13) is adjacent to one side of the inclined guide surface (221).

7. The anti-overstock test reagent card of claim 1, wherein: the bottom surface of the upper shell (1) is convexly provided with a pressing block (14) aligned to the concave space (24), and the pressing block (14) is used for pressing the test paper (3) downwards to the concave space (24).