Hole and uneven interface trace material evidence extractor

Abstract

The utility model discloses a trace material evidence extractor for holes and uneven interfaces, which comprises a base and an extracting assembly arranged on the upper portion of the base, the extracting assembly comprises a plurality of independent extracting structures, and each independent extracting structure comprises a supporting rod connected with the base and an extracting head detachably arranged on the upper portion of the supporting rod. The supporting rod is a telescopic rod and is made of a bendable material, an inserting hole is formed in the top of the supporting rod, the extracting head comprises an inserting rod inserted into the inserting hole, and a sponge extracting part is arranged on the upper portion of the inserting rod; through a telescopic and bendable independent extraction structure, the device can be attached to a hole and an uneven interface, and the material evidence extraction efficiency is improved; the sponge extraction part has good elasticity, and the conductive adhesive layer can enhance the adhesive force to trace physical evidences, so that fine physical evidences such as fibers, powder, glass fragments and shooting residues can be accurately extracted, and the leakage of the physical evidences is reduced; the extraction head can be detached and replaced, and when the extraction head is polluted or damaged after being used, only the extraction head needs to be replaced, and the whole extractor does not need to be replaced.

Description

Technical Field

[0001] This utility model relates to the field of physical evidence extraction technology, specifically to a micro-extraction device for holes and uneven interfaces. Background Technology

[0002] In the field of forensic evidence investigation, it is often necessary to extract trace evidence from uneven surfaces such as holes, grooves, and curved surfaces, including fibers, glass fragments, bullet residue, powder, and paint flakes. Traditional methods for extracting trace evidence, such as directly using tweezers, adhesive tape, or brushing, have many limitations. For holes with complex shapes and narrow spaces, as well as uneven surfaces, traditional tools struggle to accurately locate the evidence, easily leading to omissions or damage. Furthermore, traditional extraction tools are often disposable or have a fixed structure, making it difficult to flexibly adjust them according to the actual investigation scenario, resulting in high costs and poor applicability. Utility Model Content

[0003] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a trace evidence extractor for holes and uneven interfaces, including a base and an extraction component disposed on the upper part of the base. The extraction component includes several independent extraction structures. Each independent extraction structure includes a support rod connected to the base and an extraction head detachably disposed on the upper part of the support rod. The support rod is a telescopic rod and is made of a bendable material. An insertion hole is provided at the top of the support rod. The extraction head includes an insertion rod inserted into the insertion hole. A sponge extraction part is disposed on the upper part of the insertion rod. A conductive adhesive layer is disposed on the top of the sponge extraction part. The independent extraction structures are arranged in several concentric circles from the center of the base outward.

[0004] Furthermore, a fixing component is provided outside the extraction component, and the fixing component is a hand-tightening clamp.

[0005] Furthermore, a handle is provided at the lower part of the base.

[0006] Furthermore, the upper part of the base is covered with an elastic sponge pad, and the upper part of the elastic sponge pad is provided with a sleeve that is inserted into the bottom of the support rod.

[0007] The advantages of this utility model compared with the prior art are as follows:

[0008] By incorporating several retractable and bendable independent extraction structures, the device can conform to holes and uneven surfaces, improving the efficiency of evidence extraction. The sponge extraction section has good elasticity, and the conductive adhesive layer enhances adhesion to trace amounts of evidence, enabling precise extraction of minute evidence such as fibers, powders, bullet residue, and glass shards, reducing the omission of evidence. The extraction head is detachable and replaceable; when the extraction head becomes contaminated or damaged after use, only the extraction head needs to be replaced, eliminating the need to replace the entire extractor and reducing operating costs. A handle is provided at the bottom of the base for easy hand operation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the upper part of a micro-evidence extractor with holes and uneven interfaces according to this utility model.

[0010] Figure 2 This is a schematic diagram of the lower part of a micro-evidence extractor with holes and uneven interfaces according to this utility model.

[0011] Figure 3 This is a schematic diagram of the independent extraction structure in a micro-evidence extractor with holes and uneven interfaces according to this utility model. Detailed Implementation

[0012] 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 and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0013] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0014] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0015] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0016] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 mechanical connection or an electrical 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.

[0017] Example:

[0018] Combined with appendix Figure 1-3 This embodiment discloses a trace evidence extractor for holes and uneven interfaces, including a base 1 and an extraction component 2 disposed on the upper part of the base 1. A handle 5 is disposed on the lower part of the base 1. The extraction component 2 includes several independent extraction structures 3. Each independent extraction structure 3 includes a support rod 301 connected to the base 1 and an extraction head 302 detachably disposed on the upper part of the support rod 301. The support rod 301 is a telescopic rod and is made of a bendable material. An insertion hole 303 is disposed on the top of the support rod 301. The extraction head 302 includes an insertion rod 302a inserted into the insertion hole 303. A sponge extraction part 302b is disposed on the upper part of the insertion rod 302a. A conductive adhesive layer 302c is disposed on the top of the sponge extraction part 302b. The independent extraction structures 3 are arranged in several concentric circles from the center of the base 1 outward.

[0019] The extraction component 2 is provided with a fixing component 4, which is a hand-tightening clamp. The hand-tightening clamp is an existing product and is not a key design feature of this application, so it will not be described in detail. Those skilled in the art can select a suitable size hand-tightening clamp according to specific needs.

[0020] In addition, the upper part of the base 1 is covered with an elastic sponge pad 5, and the upper part of the elastic sponge pad 5 is provided with a plug sleeve 6 that is inserted into the bottom of the support rod 301.

[0021] During use, ensure all support rods of the individual extraction structures are in their initial extended state, aligning the tops of the extraction assembly on the same plane. Hold the handle of the base and place the extractor near the area to be extracted, ensuring the sponge extraction section contacts the evidence on the hole or uneven surface. Gently press and hold for several seconds, allowing each individual extraction structure to deform according to the shape of the hole or uneven surface, conforming to it. Simultaneously, utilize the elasticity of the sponge extraction section and the adhesiveness of the conductive adhesive layer to extract trace amounts of evidence onto the extraction head. After extraction, the insertion rod of the extraction head can be pulled out of the insertion hole of the support rod, or the support rod can be completely removed from the insertion sleeve. If extraction is required in other areas, replace with a new extraction head and repeat the above steps. The extracted head should be properly stored after extraction to avoid contamination and damage for subsequent laboratory testing and analysis.

[0022] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0023] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A trace evidence extractor for holes and uneven interfaces, characterized in that, The device includes a base and an extraction assembly disposed on the upper part of the base. The extraction assembly includes several independent extraction structures. Each independent extraction structure includes a support rod connected to the base and an extraction head detachably disposed on the upper part of the support rod. The support rod is a telescopic rod made of a bendable material and has an insertion hole at its top. The extraction head includes an insertion rod inserted into the insertion hole. A sponge extraction part is disposed on the upper part of the insertion rod, and a conductive adhesive layer is disposed on the top of the sponge extraction part. The independent extraction structures are arranged in several concentric circles from the center of the base outward.

2. The trace evidence extractor with holes and uneven interfaces according to claim 1, characterized in that, The extraction component is externally provided with a fixing component, which is a hand-tightening clamp.

3. The trace evidence extractor for holes and uneven interfaces according to claim 1, characterized in that, A handle is provided at the bottom of the base.

4. The trace evidence extractor for holes and uneven interfaces according to claim 1, characterized in that, The upper part of the base is covered with an elastic sponge pad, and the upper part of the elastic sponge pad is provided with a sleeve that is inserted into the bottom of the support rod.

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