Bloodstain screening device

Abstract

The utility model discloses a bloodstain screening device, which relates to the field of bloodstain screening and comprises a screening component, the screening component comprises a hollow through shell, a reagent strip limiting tube is fixedly connected inside the front end of the through shell, and the front end of the through shell is gradually narrowed flat. The bloodstain screening device comprises a through shell, a colloidal gold reagent strip is arranged in the through shell, a reagent strip limiting tube is arranged in the through shell, the reagent strip limiting tube is of a flat strip-shaped design with the hollow interior, the through shell and the reagent strip limiting tube are both made of transparent acrylic materials, and a test tube is fixed in the middle of the interior of the through shell. The internal buffer solution can fully soak the reagent strip conveniently, the internal buffer solution is absorbed by the built-in cotton ball, the internal piston rod is pushed to extrude the cotton ball when inspection is needed, the buffer solution is extruded out to be in contact with the reagent strip, the buffer solution does not need to be prepared in real time during detection, and the overall detection efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of bloodstain screening, specifically a bloodstain screening device. Background Technology

[0002] Colloidal gold bloodstain screening is a rapid screening method based on colloidal gold immunochromatography to detect the presence of human blood components in samples. Its principle involves using colloidal gold particles labeled with specific antibodies. When a sample contains human blood-related antigens (such as hemoglobin), the antigen binds to the labeled antibody and migrates towards the detection line under chromatographic action. There, it binds to another antibody fixed at the detection line, forming a visible red band, thus determining whether the sample contains human blood. This method is simple to operate and rapid, and is commonly used in criminal investigations and crime scene investigations to preliminarily determine the source of bloodstains.

[0003] In current practical applications of colloidal gold screening, most methods employ traditional procedures: soaking colloidal gold test strips in buffer solution and interpreting the color change on the strips to determine the test results. However, this conventional method reveals numerous drawbacks when used in outdoor environments. Outdoor environments are complex and variable, often lacking adequate experimental conditions and resources. After sample collection, staff must not only prepare buffer solution on-site but also prepare containers on-site. This series of preparations is cumbersome and time-consuming, severely slowing down the testing process and significantly reducing the overall efficiency of outdoor screening. Therefore, a prefabricated bloodstain screening device is urgently needed. Utility Model Content

[0004] To achieve the above objectives, the present invention provides the following technical solution: a bloodstain screening device, comprising a screening component, wherein the screening component includes a through-shell, the through-shell being hollow, and a reagent strip limiting tube being fixedly connected inside the front end of the through-shell.

[0005] Preferably, the front end of the through-shell is a flat design that gradually narrows, and the reagent strip limiting tube is a flat strip design with an internal hollow interior.

[0006] Preferably, both the through-shell and the reagent strip limiting tube are made of transparent acrylic material.

[0007] Preferably, a test tube is fixed in the center inside the through-shell, and the test tube has a hollow design that is narrower at the front and wider at the back.

[0008] Preferably, the test tube is uniformly filled with several groups of cotton balls.

[0009] Preferably, a piston rod is slidably connected to the rear end of the through-shell.

[0010] Preferably, the front end of the piston rod is a gradually narrowing frustum structure, and the front end of the piston rod corresponds to the inside of the test tube.

[0011] Preferably, the reagent strip limiting tube is located on the same center line as the test tube and the piston rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention proposes a bloodstain screening device. The device uses a reagent strip limiting tube to limit the colloidal gold reagent strip, which allows the internal buffer solution to fully soak the reagent strip. The internal buffer solution is absorbed by a built-in cotton ball. When a test is needed, the internal piston rod is pushed to squeeze the cotton ball, squeezing out the buffer solution to contact the reagent strip. This eliminates the need to prepare the buffer solution in real time during testing, thereby improving the overall testing efficiency. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 For the present utility model Figure 1 Cross-sectional view;

[0017] Figure 3 This is a cross-sectional view of the present invention in use.

[0018] As shown in the figure: 1. Screening component; 11. Through-shell; 12. Reagent strip limiting tube; 13. Test tube; 14. Cotton ball; 15. Piston rod. Detailed Implementation

[0019] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0020] Please see Figures 1 to 3 The present invention provides a technical solution: a blood stain screening device, including a screening component 1, the screening component 1 including a through shell 11, the through shell 11 being hollow, and a reagent strip limiting tube 12 being fixedly connected to the front end of the through shell 11.

[0021] The screening device can limit the colloidal gold reagent strip using the reagent strip limiting tube 12, which allows the internal buffer solution to fully soak the reagent strip. The internal buffer solution is absorbed by the built-in cotton ball 14. When a test is needed, the internal piston rod 15 is pushed to squeeze the cotton ball 14, squeezing out the buffer solution to contact the reagent strip. There is no need to prepare the buffer solution in real time during the test, which can improve the overall test efficiency.

[0022] The front end of the through-shell 11 is a flat design that gradually narrows, and the reagent strip limiting tube 12 is a flat strip design with a hollow interior.

[0023] Both the through-shell 11 and the reagent strip limiting tube 12 are made of transparent acrylic material;

[0024] A test tube 13 is fixed in the center inside the shell 11. The test tube 13 has a hollow design that is narrow at the front and wide at the back.

[0025] The inside of test tube 13 is evenly filled with several sets of cotton balls 14;

[0026] A piston rod 15 is slidably connected to the rear end of the inner casing 11;

[0027] The front end of the piston rod 15 is a gradually narrowing frustum structure, and the front end of the piston rod 15 corresponds to the inside of the test tube 13.

[0028] The reagent strip limiting tube 12, test tube 13, and piston rod 15 are located on the same center line;

[0029] When in use, the piston rod 15 is pulled out from inside the through-shell 11 and the prepared buffer solution is slowly poured into the through-shell 11. The buffer solution flows into the test tube 13 and comes into contact with the cotton ball 14, which absorbs the buffer solution.

[0030] At this point, the piston rod 15 is reset and inserted into the through-shell 11. When blood stain screening is required, the colloidal gold reagent strip is inserted into the reagent strip limiting tube 12. Then, the piston rod 15 is pushed toward the test tube 13 and squeezes the cotton ball 14 inside the test tube 13. After the cotton ball 14 is compressed, the buffer solution inside flows out through the lower end of the test tube 13 and comes into contact with the colloidal gold reagent strip. The through-shell 11 and the reagent strip limiting tube 12 made of transparent acrylic material can be easily observed in real time. When the surface of the colloidal gold reagent strip shows two horizontal bars, it is positive; when it shows one horizontal bar, it is negative.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0032] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bloodstain screening device, characterized in that: The screening component (1) includes a through-shell (11) which is hollow and has a reagent strip limiting tube (12) fixedly connected to the front end of the through-shell (11).

2. The bloodstain screening device according to claim 1, characterized in that: The front end of the through-shell (11) is a flat design that gradually narrows, and the reagent strip limiting tube (12) is a flat strip design with a hollow interior.

3. The bloodstain screening device according to claim 2, characterized in that: Both the through-shell (11) and the reagent strip limiting tube (12) are made of transparent acrylic material.

4. A bloodstain screening device according to claim 3, characterized in that: A test tube (13) is fixed in the center inside the through-shell (11), and the test tube (13) has a hollow design that is narrow at the front and wide at the back.

5. A bloodstain screening device according to claim 4, characterized in that: The test tube (13) is evenly filled with several sets of cotton balls (14).

6. A bloodstain screening device according to claim 5, characterized in that: A piston rod (15) is slidably connected to the rear end of the through-shell (11).

7. A bloodstain screening device according to claim 6, characterized in that: The piston rod (15) has a gradually narrowing frustum structure at its front end, and the front end of the piston rod (15) corresponds to the interior of the test tube (13).

8. A bloodstain screening device according to claim 7, characterized in that: The reagent strip limiting tube (12) is located on the same center line as the test tube (13) and the piston rod (15).

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