Sticking and collecting tool

Abstract

The utility model relates to the technical field of forensic medicine DNA extraction, and discloses a sticking and collecting tool which comprises a storage tube, a tube cover is arranged at the top end of the outer side wall of the storage tube, a sticking and collecting swab is arranged on the inner wall of the storage tube and comprises a fixed tube, the fixed tube is connected to the inner wall of the storage tube in a sliding mode, and the tube cover is arranged on the inner wall of the storage tube. A connecting rod penetrates through the inner wall of the fixing pipe and is in sliding connection with the inner wall of the fixing pipe, a placing block is fixedly connected to the top end of the outer wall of the connecting rod, a cuboid sticking swab head is fixedly connected to the bottom end of the outer wall of the connecting rod, and the connecting rod is clamped to the inner wall of the fixing pipe through a limiting mechanism. In the utility model, the silicon rubber substrate can better fit the surface of an object attached with cast-off cells, and the cuboid swab head can be used for sticking the cast-off cells with five surfaces and is suspended and stored in the storage tube, so that the collection rate of trace biological material evidences can be improved, the collection and inspection material transfer loss can be reduced, and the DNA (Deoxyribonucleic Acid) detection rate can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of forensic DNA extraction, in particular to a sticking collection tool. Background Art

[0002] Forensic evidence testing involves contact biological evidence such as human exfoliated cells, such as sweat stains on countertops, fingerprints, contact marks on door handles, etc. Such evidence has important evidentiary value for the detection and prosecution of cases. However, such evidence is very small in quantity, which is difficult for forensic DNA identification. The adhesive method is a way to solve this difficulty.

[0003] There are two types of commonly used collection tools for the adhesive method. One type is to attach an adhesive surface to a plane of a cuboid or a cylinder. After the adhesive collection, the adhesive surface needs to be torn off and placed in a DNA extracting solution during the subsequent DNA test. The adhesive surface is easy to fold, which affects the success rate of DNA extraction, and it is easy to cause contamination during the process of tearing off the adhesive surface; the other type is to attach an adhesive surface to a curved surface of a cylinder to form a roller. After the adhesive collection, the roller with the adhesive surface needs to be placed in a DNA extracting solution for extraction. This method has two shortcomings. One is that when removing the roller, it is generally removed with a hand wearing a disposable glove. The gloves should be changed every time it is taken out, which is troublesome to operate. If the gloves are not changed, the two ends of the roller are easily contaminated; the second is that after the adhesive collection, the roller should be immediately placed in a test tube or conical tube containing a DNA extracting solution, so it is more suitable for operation in a DNA testing laboratory. If it is collected at the scene of the case, it is usually placed in an empty test tube or conical tube for temporary storage. During storage and transportation, a part of the curved surface of the roller is easy to contact the inner wall of the test tube or conical tube, causing the transfer and loss of exfoliated cells. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a sticky collection tool, which solves the problem in the above-mentioned background technology that the success rate of DNA extraction of trace biological evidence such as exfoliated cells is affected due to the deficiencies in the extraction tool.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a sticky collection tool, including a storage tube, a tube cover is provided at the top end of the outer side wall of the storage tube, an sticky collection swab is provided on the inner wall of the storage tube, and the sticky collection swab includes a fixed tube, a connecting rod passes through the inner wall of the fixed tube and is slidably connected, a rectangular sticky swab head is fixedly connected to the bottom end of the outer wall of the connecting rod, and the connecting rod is clamped on the inner wall of the fixed tube through a limiting mechanism.

[0006] Preferably, a placement block is fixedly connected to the top end of the outer wall of the connecting rod, and a clip is inserted into the top end of the outer wall of the placement block.

[0007] Preferably, the limiting mechanism comprises a limiting ball, and the limiting ball is elastically connected to the inner wall of the bottom end of the fixed tube through a limiting spring.

[0008] Preferably, one end of the limit spring is fixedly connected to the outer wall of the limit ball, and the other end of the limit spring is fixedly connected to the inner wall of the bottom end of the fixed tube.

[0009] Preferably, the limiting ball is slidably connected to the inner wall of the fixed tube, and a plurality of ball grooves are provided on the surface of the connecting rod, and the limiting ball contacts the inner wall of the ball groove.

[0010] Preferably, the fixing tube is slidably connected to the inner wall of the storage tube.

[0011] Preferably, a cavity is formed at the top of the outer wall of the fixed tube, and the tube cover is in contact with the inner wall of the cavity.

[0012] Preferably, the clamp is slidably connected to the inner wall of the fixed tube.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, the rectangular sticky swab head can use 5 faces to stick to the exfoliated cells, can collect as much biological evidence as possible, and fully extract trace evidence. Its silicone rubber base has a certain elasticity, and can better fit the surface of the object to which the exfoliated cells are attached during extraction, so that trace evidence can be fully extracted. The silicone rubber does not expand, adsorb, or deform in the extract, and can settle naturally, making the subsequent DNA extraction operation easier.

[0015] 2. In the utility model, a special clip is used, one tube is used for one purpose, and cross contamination can be effectively prevented. The retractable connecting rod design saves storage space. When the collection swab is stored in the storage tube, the lower end and four sides of the rectangular sticky swab head do not contact the storage tube, thereby avoiding the loss of sample transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the adhesive collection swab of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the fixed pipe of the utility model;

[0019] Figure 4 This is a schematic structural diagram of the utility model in a separated state of the clamp and the connecting rod.

[0020] Legend:

[0021] 1. Storage tube; 2. Tube cover; 3. Adhesive collection swab; 4. Fixed tube; 5. Rectangular swab head; 6. Limit spring; 7. Limit ball; 8. Connecting rod; 9. Placement block; 10. Clip. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 3 The utility model provides an adhesive collection tool, including a storage tube 1, a tube cover 2 is arranged at the top of the outer side wall of the storage tube 1, an adhesive collection swab 3 is arranged on the inner wall of the storage tube 1, and the adhesive collection swab 3 includes a fixed tube 4, the fixed tube 4 is slidably connected to the inner wall of the storage tube 1, and a connecting rod 8 is penetrated and slidably connected to the inner wall of the fixed tube 4. By setting the connecting rod 8, the rectangular adhesive swab head 5 can be extended by the connecting rod 8. The extended adhesive swab head makes the operation of sticking and collecting samples more convenient.

[0024] See also Figure 4 The top end of the outer wall of the connecting rod 8 is fixedly connected with a placement block 9, and the top end of the outer wall of the placement block 9 is inserted with a clip 10. The clip 10 is slidably connected to the inner wall of the fixed tube 4. The clip 10 is a special clip 10 for testing materials. It is a disposable item and can effectively prevent cross infection. The bottom end of the outer wall of the connecting rod 8 is fixedly connected with a rectangular sticky swab head 5. The base of the rectangular sticky swab head 5 is made of silicone rubber, and there are sticky surfaces on the lower end and four sides, and there is a protective film on the sticky surface.

[0025] See also Figure 3 and Figure 4 The connecting rod 8 is clamped on the inner wall of the fixed tube 4 through a limiting mechanism. The limiting mechanism includes a limiting ball 7. The limiting ball 7 is elastically connected to the inner wall of the bottom end of the fixed tube 4 through a limiting spring 6. One end of the limiting spring 6 is fixedly connected to the outer wall of the limiting ball 7. The other end of the limiting spring 6 is fixedly connected to the inner wall of the bottom end of the fixed tube 4. When the connecting rod 8 moves downward or upward, the position of its ball groove will squeeze the limiting ball 7 to move on the inner wall of the fixed tube 4 until the position of the next set of ball grooves is reached. The limiting ball 7 will be elastically acted on by the limiting spring 6 and restored to its initial position, thereby fixing the connecting rod 8. The limiting ball 7 is slidably connected to the inner wall of the fixed tube 4.

[0026] See also Figure 1 and Figure 4A cavity is provided at the top of the outer wall of the fixed tube 4, and the tube cover 2 is in contact with the inner wall of the cavity, so that the top of the fixed tube 4 is sealed by the tube cover 2 to prevent the clip 10 in the fixed tube 4 from falling off. A plurality of ball grooves are provided on the surface of the connecting rod 8, and the limiting ball 7 is in contact with the inner wall of the ball groove, so that the rising or falling position of the connecting rod 8 is fixed by the limiting ball 7, and the connecting rod 8 will not move without the influence of external force.

[0027] Working principle: First, fill in the sample label and barcode and stick it on the storage tube 1. When in use, open the tube cover 2, take out the fixed tube 4 with one hand, take out the clip 10 with the other hand and tear off the lower end and the surrounding protective film of the rectangular sticky swab head 5 with the clip 10; at the suspected spot where there is a spot with human body exfoliated epithelial cells, first use the lower end glue surface to stick the suspicious spot, and then use the surrounding glue surface to continue to stick the suspicious spot. At this time, for the convenience of operation, the connecting rod 8 can be pushed out, and the connecting rod 8 can be retracted after sticking. At the same time, when the connecting rod 8 moves outward and downward, the position of its ball groove will squeeze the limiting ball 7 to move on the inner wall of the fixed tube 4 until the position of the next group of ball grooves, the limiting ball 7 will be affected by the elasticity of the limiting spring 6, and it will be restored to its initial position, thereby fixing the connecting rod 8, and this reciprocating process is repeated until the connecting rod 8 drives the rectangular sticky swab head 5 to adjust to a suitable position, the fixed tube 4 drives the rectangular sticky swab head 5 back into the storage tube 1, the clip 10 is put back into the fixed tube 4, the tube cover 2 is covered, and the collection is completed. When DNA testing is performed in the laboratory, the sticky collection swab 3 is taken out, the cuboid sticky swab head 5 is cut off or broken at the mark of the connecting rod 8 and then placed in a DNA extraction reagent, and then the DNA test can be started.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sticky collection tool, comprising a storage tube (1), characterized in that: A tube cover (2) is provided at the top end of the outer side wall of the storage tube (1), and an adhesive collection swab (3) is provided on the inner wall of the storage tube (1). The adhesive collection swab (3) comprises a fixed tube (4), and a connecting rod (8) passes through the inner wall of the fixed tube (4) and is slidably connected thereto. A rectangular adhesive swab head (5) is fixedly connected to the bottom end of the outer wall of the connecting rod (8), and the connecting rod (8) is clamped on the inner wall of the fixed tube (4) via a limiting mechanism.

2. The adhesive collection tool according to claim 1, characterized in that: The top end of the outer wall of the connecting rod (8) is fixedly connected to a placement block (9), and the top end of the outer wall of the placement block (9) is plugged with a clip (10).

3. The adhesive collection tool according to claim 1, characterized in that: The limiting mechanism comprises a limiting ball (7), and the limiting ball (7) is elastically connected to the inner wall of the bottom end of the fixed tube (4) through a limiting spring (6).

4. The adhesive collection tool according to claim 3, characterized in that: One end of the limit spring (6) is fixedly connected to the outer wall of the limit ball (7), and the other end of the limit spring (6) is fixedly connected to the inner wall of the bottom end of the fixed tube (4).

5. The adhesive collection tool according to claim 3, characterized in that: The limiting ball (7) is slidably connected to the inner wall of the fixed tube (4); a plurality of groups of ball grooves are provided on the surface of the connecting rod (8); and the limiting ball (7) is in contact with the inner wall of the ball groove.

6. The adhesive collection tool according to claim 1, characterized in that: The fixing tube (4) is slidably connected to the inner wall of the storage tube (1).

7. The adhesive collection tool according to claim 1, characterized in that: A cavity is provided at the top end of the outer wall of the fixed tube (4), and the tube cover (2) is in contact with the inner wall of the cavity.

8. The adhesive collection tool according to claim 2, characterized in that: The clamp (10) is slidably connected to the inner wall of the fixed tube (4).

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