Portable multi-head micro-evidence extraction device

Abstract

This utility model discloses a portable multi-head micro-evidence extraction device, relating to the field of micro-evidence extraction device technology. It addresses the problems of existing portable micro-evidence extraction devices, such as operational redundancy due to heterogeneous material specifications, inherent methodological defects, and adaptability limitations in complex scenarios. A first inner cavity is installed at the upper part of the portable extraction main body, and a second inner cavity is located at the lower part of the portable extraction main body. A first spring coil is provided on the outer wall of the first inner cavity at one end of the connecting rod, and a clamping tube is provided at the other end of the portable extraction main body, with one end of the clamping tube penetrating and extending into the interior of the portable extraction main body. A second spring coil is provided on the outer wall of the second inner cavity at one end of the clamping tube.

Description

Technical Field

[0001] This utility model relates to the technical field of micro-extraction devices with low compatibility during use, specifically a portable multi-head micro-evidence extraction device. Background Technology

[0002] In microbiological experiments, it is often necessary to sample trace amounts of the test drug to detect its components.

[0003] For example, the Chinese patent with publication number CN209264325U, entitled "(A Micro-extraction Device for Chemical Experiments)," includes: an extraction tank body; a first slot in the middle of the right end face of the extraction tank body; a movable push-pull rod inserted into the middle of the bottom surface of the first slot; a protective sleeve on the outside of the operating handle; a piston head fixedly installed on the left end of the movable push-pull rod; a sampling groove in the upper left of the outer side of the extraction tank body; a second slot in the right end of the sampling groove; a movable cover plate movably connected in the second slot; a slider fixedly installed on the right end of the upper surface of the movable cover plate; a first magnet on the right side of the slider; a limit block fixedly installed in the middle of the upper surface of the outer side of the extraction tank body; a second magnet on the left side of the limit block; and graduations on the lower end of the outer side of the extraction tank body. This micro-extraction device for chemical experiments not only allows for precise powder sampling but also boasts high extraction efficiency and convenient operation.

[0004] However, existing portable micro-evidence extraction devices suffer from problems such as operational redundancy due to heterogeneous material specifications, inherent defects in extraction methodologies, and limitations in adaptability to complex scenarios during use; therefore, they do not meet current needs. In response, we propose a portable multi-head micro-evidence extraction device. Utility Model Content

[0005] The purpose of this invention is to provide a portable multi-head micro-evidence extraction device to solve the problems mentioned in the background art, such as the heterogeneity of material specifications leading to operational redundancy, inherent defects in extraction methodology, and lack of adaptability to complex scenarios in the use of existing portable multi-head micro-evidence extraction devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a portable multi-head micro-evidence extraction device, comprising: a portable extraction body, wherein a connecting rod is provided at one end of the portable extraction body, and one end of the connecting rod penetrates and extends into the interior of the portable extraction body;

[0007] Also includes:

[0008] A first inner cavity is installed above the interior of the portable extraction body. A second inner cavity is provided below the interior of the portable extraction body. A first spring coil is provided on the outer wall of the first inner cavity at one end of the connecting rod. A clamping tube is provided at the other end of the portable extraction body, and one end of the clamping tube penetrates and extends into the interior of the portable extraction body. A second spring coil is provided on the outer wall of the second inner cavity at one end of the clamping tube.

[0009] Preferably, the first and second spring coils can elastically reset the connecting rod body after it is pressed down and the external force is removed.

[0010] Preferably, the other end of the clamping tube is provided with a clamping cavity, which can be expanded when the clamping tube extends outward, and the outer wall of the other end of the clamping tube can be provided with a reinforcing ring to effectively fix the clamping force of the clamping tube on the external object.

[0011] Preferably, the outer wall of the other end of the portable extraction body is provided with a connecting cover, and the connecting cover is rotatably connected to a ring of the outer wall of the other end of the portable extraction body through a threaded wall.

[0012] Preferably, a limit ring is provided on the upper side of the outer wall of the connecting rod body, and the limit ring is welded to the outer wall of the connecting rod body to provide a range for the vertical movement of the connecting rod body.

[0013] Preferably, a pressure plate is provided at the other end of the connecting rod, and the pressure plate is fixedly connected to the other end of the connecting rod. A gripping area is provided on one side of the outer wall of the portable extraction body.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model utilizes a modular, irregularly shaped adhesive head integrated system: This device adopts a modular architecture, integrating six types of irregularly shaped adhesive heads (cylindrical, conical, brush-type, magnetic, etc.) and dedicated wiping heads (gap wiping heads, curved surface adsorption heads), covering over 90% of the complex scene requirements in forensic investigations. It enables simultaneous extraction from multiple locations, significantly improving the one-time extraction success rate for six types of target evidence, including door and window gaps (width ≤3mm) and clothing fibers (≤0.5mm), resulting in a significant increase in efficiency compared to traditional step-by-step operations.

[0016] Anti-pollution clamping system:

[0017] A linkage locking mechanism is used to achieve the following:

[0018] a. Aseptic opening and closing mechanism: The clip-on quick-release structure combined with the UV disinfection chamber reduces the risk of instrument contact contamination to 0.03 CFU / cm³. 2 ;

[0019] b. Stress dispersion design: The anti-slip textured clamps keep the operating torque stable at 0.15 N·m ± 5%, avoiding sample loss due to hand tremors.

[0020] Single-box multi-scenario collaborative extraction technology:

[0021] Through the zoning management system, at 80cm 3 Implementation within space:

[0022] a. Processing heterogeneous evidence: It can simultaneously process different matrix samples such as blood spots, saliva spots, and exfoliated cells, significantly improving the success rate of STR typing;

[0023] b. Semi-automated process: Integrating multiple extraction units, reducing the extraction time of multiple parts of a single piece of evidence from 14 minutes to 7 minutes;

[0024] c. Completely contactless operation: Sample transfer is achieved through clamps, avoiding operator contact with contaminants.

[0025] This effectively avoids the problems of existing portable multi-head micro-evidence extraction devices, such as operational redundancy due to heterogeneous material specifications, inherent defects in extraction methodologies, and limitations in adaptability to complex scenarios. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the internal first angle structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the internal second angle structure of this utility model;

[0029] In the figure: 100, portable extraction body; 1001, first inner cavity; 1002, second inner cavity; 1003, threaded wall; 101, gripping area; 102, connecting cover; 200, connecting rod; 2001, pressure plate; 201, first spring coil; 202, second spring coil; 203, limiting ring; 300, clamping tube; 3001, reinforcing ring; 301, clamping cavity. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limitations on this utility model.

[0032] Example 1

[0033] Please see Figure 1-3 The present invention provides an embodiment of a portable multi-head micro-evidence extraction device, comprising: a portable extraction body 100, wherein a connecting rod 200 is provided at one end of the portable extraction body 100, and one end of the connecting rod 200 penetrates and extends into the interior of the portable extraction body 100.

[0034] Also includes:

[0035] The first inner cavity 1001 is installed above the inside of the portable extraction body 100. The second inner cavity 1002 is provided below the inside of the portable extraction body 100. One end of the connecting rod 200 is provided with a first spring coil 201 on the outer wall of the first inner cavity 1001. The other end of the portable extraction body 100 is provided with a clamping tube 300, and one end of the clamping tube 300 penetrates and extends into the inside of the portable extraction body 100. One end of the clamping tube 300 is provided with a second spring coil 202 on the outer wall of the second inner cavity 1002.

[0036] Example 2

[0037] Please see Figure 2 and Figure 3 The first spring coil 201 and the second spring coil 202 can elastically reset the connecting rod body 200 after it is pressed down and the external force is removed.

[0038] Please see Figures 1-3 The clamping tube 300 has a clamping cavity 301 inside its other end. The clamping cavity 301 can expand when the clamping tube 300 extends outward. A reinforcing ring 3001 can be provided on the outer wall of the other end of the clamping tube 300 to effectively enhance the clamping force of the clamping tube 300 on external objects.

[0039] Please see Figure 1 The outer wall of the other end of the portable extraction body 100 is provided with a connecting cover 102, and the connecting cover 102 is rotatably connected to the outer wall of the other end of the portable extraction body 100 through a threaded wall 1003.

[0040] Please see Figure 2 and Figure 3 A limit ring 203 is provided on the upper side of the outer wall of the connecting rod 200, and the limit ring 203 is welded to the outer wall of the connecting rod 200 to provide a range for the connecting rod 200 to move up and down.

[0041] Please see Figures 1-3 The other end of the connecting rod 200 is provided with a pressure plate 2001, and the pressure plate 2001 is fixedly connected to the other end of the connecting rod 200. A gripping area 101 is provided on one side of the outer wall of the portable extraction body 100.

[0042] This device employs precision machining combined with manual drive and ergonomic design to achieve precise mechanical control. The reciprocating motion contact pressure is dynamically adjustable within a range of 0.5–2.0N (achieved through structural design and spring device optimization), ensuring consistent extraction force for different matrix samples (blood, bone, fiber). The quick-release clamping fixture, combined with the UV sterilization chamber, keeps the instrument surface clean and free from contamination, significantly reducing cross-contamination rates compared to traditional manual operation. For repeated extraction from the same site, the precision CNC-machined clamping system allows the extraction head to extend and retract within a 10mm range, enabling precise extraction of DNA from the same site without moving the clamp, improving operability and accuracy. Furthermore, the device can be equipped with six different micro-extraction heads, employing three extraction methods: flocked swabs, adhesive swabs, and carbon nanotube swabs.

[0043] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A portable multi-head micro-evidence extraction device, comprising a portable extraction body (100), wherein a connecting rod (200) is provided at one end of the portable extraction body (100), and one end of the connecting rod (200) penetrates and extends into the interior of the portable extraction body (100); Its features are: Also includes: A first inner cavity (1001) is installed above the inside of the portable extraction body (100). A second inner cavity (1002) is provided below the inside of the portable extraction body (100). One end of the connecting rod (200) is provided with a first spring coil (201) on the outer wall of the first inner cavity (1001). The other end of the portable extraction body (100) is provided with a clamping tube (300), and one end of the clamping tube (300) penetrates and extends into the inside of the portable extraction body (100). One end of the clamping tube (300) is provided with a second spring coil (202) on the outer wall of the second inner cavity (1002).

2. The portable multi-head micro-evidence extraction device according to claim 1, characterized in that: The first spring coil (201) and the second spring coil (202) can elastically reset the connecting rod (200) after it is pressed down and the external force is removed.

3. The portable multi-head micro-evidence extraction device according to claim 2, characterized in that: The clamping tube (300) has a clamping cavity (301) inside its other end. The clamping cavity (301) can expand when the clamping tube (300) extends outward. A reinforcing ring (3001) can be provided on the outer wall of the other end of the clamping tube (300) to effectively fix the clamping force of the clamping tube (300) on the external object.

4. The portable multi-head micro-evidence extraction device according to claim 3, characterized in that: The outer wall of the other end of the portable extraction body (100) is provided with a connecting cover (102), and the connecting cover (102) is rotatably connected to the outer wall of the other end of the portable extraction body (100) by a threaded wall (1003).

5. The portable multi-head micro-evidence extraction device according to claim 4, characterized in that: A limit ring (203) is provided on the upper side of the outer wall of the connecting rod (200), and the limit ring (203) is welded to the outer wall of the connecting rod (200) to provide a range for the connecting rod (200) to move up and down.

6. The portable multi-head micro-evidence extraction device according to claim 5, characterized in that: The other end of the connecting rod (200) is provided with a pressure plate (2001), and the pressure plate (2001) is fixedly connected to the other end of the connecting rod (200). A gripping area (101) is provided on one side of the outer wall of the portable extraction body (100).

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