CN220432830U - Firing pin type micro-material evidence extracting device - Google Patents
Firing pin type micro-material evidence extracting device Download PDFInfo
- Publication number
- CN220432830U CN220432830U CN202321970650.XU CN202321970650U CN220432830U CN 220432830 U CN220432830 U CN 220432830U CN 202321970650 U CN202321970650 U CN 202321970650U CN 220432830 U CN220432830 U CN 220432830U
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- Prior art keywords
- rod
- cotton
- swab
- hollow
- firing pin
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- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000010304 firing Methods 0.000 title claims abstract description 21
- 229920000742 Cotton Polymers 0.000 claims abstract description 66
- 238000000605 extraction Methods 0.000 claims abstract description 37
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000003068 static effect Effects 0.000 claims abstract description 4
- 230000004888 barrier function Effects 0.000 claims abstract description 3
- 239000002274 desiccant Substances 0.000 claims description 5
- 238000012864 cross contamination Methods 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000007689 inspection Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000012620 biological material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Abstract
The utility model discloses a firing pin type micro-material evidence extraction device, which comprises a cotton swab and a sleeve, wherein the sleeve consists of a tube body and a tube cap, and the tail end of a swab rod of the cotton swab is inserted into the center of the inner bottom surface of the tube cap and is sealed in the tube body; the method is characterized in that: the cotton swab comprises a hollow swab rod, a cotton head, an extraction reagent and a sealing film, wherein the cotton head is wound at the front end of the hollow swab rod, the sealing film is stuck at the rear end of the hollow swab rod, the extraction reagent is filled in the hollow swab rod, and the extraction reagent is kept in relative static balance with the cotton head under the cooperation of the sealing film through the air barrier in the hollow swab rod; the center of the outer surface of the pipe cap is inserted with a firing pin, the firing pin is coaxial with the center of the hollow stick rod, and a certain distance is reserved between the front end of the firing pin and the sealing film of the cotton stick. According to the utility model, the striker is adopted to realize non-contact injection of the extraction reagent, so that not only is the transfer of the dry trace physical evidence completed at one time, but also the risk of cross contamination existing in the use of the conventional trace physical evidence extraction kit is greatly reduced.
Description
Technical Field
The utility model relates to a device for collecting and effectively extracting trace physical evidence, in particular to a firing pin type trace physical evidence extracting device.
Background
At present, tools for extracting trace biological material evidence in forensic science are various, and operators are required to dip in liquid reagents when extracting dry trace material evidence, so that the existing used trace material evidence extracting tools are tool kits which contain reagents and devices, the steps required to be operated when in use are more, and the risk of cross contamination exists.
Such as a breathable sleeve type biological material evidence cotton swab manufactured by Beijing Xingxing Ruian technologies Co., ltd. The application method is as follows: pulling out the sleeve plug, repeatedly wiping the spot part by using a cotton swab (if the material is a dry detection material, wetting the cotton swab by using 2-3 drops of ultrapure water before use), and ensuring moderate wiping strength, so as to avoid contacting other irrelevant objects in the use process; after wiping, marking one side of the cotton swab wiping the spot by a marker pen to determine the spot extraction position of the cotton swab; after the inspection material is extracted, the sleeve plug is put back into the sleeve, and sampling information is filled in. The advantages are as follows: the cotton swabs are suspended in the tube body, so that the detection materials are prevented from being polluted due to package adhesion; the bottom of the sleeve is provided with a filter membrane to ensure the permeability of air inside and outside the sleeve, prevent the mildew of the detection material caused by the humid environment, filter out small particle impurities in the outside air which can influence the quality of the detection material, avoid the pollution of the outside air and further influence the quality of the detection material, and facilitate the long-term storage of samples; the tube body is transparent, and the material detection condition is visual. But the disadvantages are as follows: when the cotton swab is wetted, the humidity is not easy to control, and excessive humidity cannot be avoided; the cotton swab head is very easy to contact other articles, so that the cotton swab head is polluted.
Disclosure of Invention
The purpose of the utility model is that: the striker type micro-material evidence extraction device is provided, and the striker is adopted to realize non-contact injection of an extraction reagent, so that not only is the transfer of dry trace material evidence completed at one time, but also the risk of cross contamination existing in the use of the conventional micro-material evidence extraction kit is greatly reduced.
The technical scheme adopted for solving the technical problems is as follows: the firing pin type micro-material evidence extraction device comprises a cotton swab and a sleeve, wherein the sleeve consists of a tube body and a tube cap, the tail end of a swab rod of the cotton swab is inserted into the center of the inner bottom surface of the tube cap and is sealed in the tube body; the method is characterized in that: the cotton swab comprises a hollow swab rod, a cotton head, an extraction reagent and a sealing film, wherein the cotton head is wound at the front end of the hollow swab rod, the sealing film is stuck at the rear end of the hollow swab rod, the extraction reagent is filled in the hollow swab rod, and the extraction reagent is kept in relative static balance with the cotton head under the cooperation of the sealing film through the air barrier in the hollow swab rod; the center of the outer surface of the pipe cap is inserted with a firing pin, the firing pin is coaxial with the center of the hollow stick rod, and a certain distance is reserved between the front end of the firing pin and the sealing film of the cotton stick.
The striker is further designed to comprise a needle bar, a thimble and a pushing cap, wherein the front end of the needle bar is provided with the thimble, the rear end of the needle bar is provided with the pushing cap, and the thimble points to the center of the sealing film.
Still further, the needle bar is provided with a position barb positioned in front of the push cap.
Still further, a desiccant pack is placed in the front cavity of the tube.
Still further, the hollow stick is provided with a frangible groove near the cotton head.
Further, the outer wall surface of the pipe body is sprayed with a tracking code.
Still further, it is contemplated that a nameplate is provided on the outer surface of the cap.
The firing pin type micro-material evidence extraction device has the following using process: pushing the push cap, linking the needle bar, enabling the thimble to puncture the sealing film of the cotton swab, and enabling the barb to fix the needle bar on the pipe cap; meanwhile, the gas-liquid balance in the cotton swab is broken, and the extraction reagent flows to the front end of the cotton swab along the hollow swab rod to infiltrate the cotton head, so that the liquid reagent is automatically injected without cross contact; the trace biological evidence can be lifted by unscrewing the tube cap and drawing out the cotton swab; after the lifting is finished, the cotton swab is put back into the tube body, the tube cap is screwed down, and the drying agent bag in the tube keeps the interior of the tube dry for a long time, so that effective DNA is not degraded by the interference of substances such as water and enzyme in the air; when the cotton swab collects a sample and is sent to a laboratory for inspection, the cotton swab head can be conveniently folded down by exerting force on the easily-folded groove, and the cotton swab head is put into the extraction device for operation.
The utility model has the advantages that:
1. the firing pin is adopted to realize the automatic injection of liquid reagent without cross contact when the trace material evidence is extracted and dry, the step that the liquid reagent is required to be dipped first when the cotton swab is extracted is perfectly skipped, the operation of transferring and extracting is completed once, and the possibility of human-induced pollution when the trace material evidence is extracted is greatly reduced.
2. The cotton swab rod is provided with the easily-folded groove, when a cotton swab is adopted to collect a sample and the sample is sent to a laboratory for inspection, the cotton swab head can be conveniently folded down by exerting force on the easily-folded groove, and the cotton swab head is put into the extraction device for operation, so that the humanized pollution is avoided.
3. The method is used for sampling trace biological evidence on different field environments and carriers, is simple to operate, and can effectively reduce human-derived cross contamination.
4. In the storage and transportation of the material evidence, the DNA can be effectively stored for a long time, the extraction efficiency of the field biological material evidence is greatly improved, the effective DNA detection rate is improved, and the criminal case solving rate is improved, so that great social benefits are generated.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the cotton swab of FIG. 1;
FIG. 3 is a schematic view of the striker of FIG. 1;
in the figure: 1 cotton swab, 2 pipe body, 3 pipe cap, 4 hollow stick pole, 5 cotton head, 6 extraction reagent, 7 sealing film, 8 firing pin, 9 needle bar, 10 thimble, 11 push cap, 12 barb, 13 drier package, 14 easy-to-fold recess, 15 tracking sign indicating number, 16 nameplate.
Detailed Description
The following further describes the technical scheme of the utility model with reference to the accompanying drawings, but the technical scheme is not to be construed as limiting, and the adaptability improvement on the technical scheme belongs to the protection scope of the utility model.
As shown in fig. 1-3, the striker type trace material evidence extraction device comprises a cotton swab 1 and a sleeve, wherein the sleeve consists of a tube body 2 and a tube cap 3, and the tail end of a swab rod of the cotton swab 1 is inserted into the center of the inner bottom surface of the tube cap 3 and is sealed in the tube body 2; the method is characterized in that: the cotton swab 1 comprises a hollow swab rod 4, a cotton head 5, an extraction reagent 6 and a sealing film 7, wherein the cotton head 5 is wound at the front end of the hollow swab rod 4, the sealing film 7 is stuck at the rear end of the hollow swab rod 4, the extraction reagent 6 is filled in the hollow swab rod 4, and the extraction reagent 6 is kept in relative static balance with the cotton head 5 under the cooperation of the sealing film 7 through the air blocking in the hollow swab rod 4; a striker 8 is inserted into the center of the outer surface of the cap 3, the striker 8 is coaxial with the center of the hollow shaft 4, and a certain distance is provided between the front end of the striker 8 and the sealing film 7 of the cotton swab.
In a further design, the firing pin 8 comprises a needle bar 9, a thimble 10 and a pushing cap 11, the thimble 10 is arranged at the front end of the needle bar 9, the pushing cap 11 is arranged at the rear end of the needle bar 9, and the thimble 10 points to the center of the sealing film 7.
A further design is that a barb 12 is arranged on the needle bar 9 in front of the push cap 11.
Still further, a desiccant bag 13 is placed in the front cavity of the tunnel.
Still further, the hollow stick 4 is provided with a frangible groove 14 located near the cotton head 5.
A further design is that the outer wall surface of the pipe body 2 is sprayed with a tracking code 15.
A further design is to provide a nameplate 16 on the outer surface of the cap 3.
The firing pin type micro-material evidence extraction device has the following using process: pushing the push cap 11, linking the needle bar 9, enabling the thimble 10 to pierce the sealing film 7 of the cotton swab, and enabling the barb 12 to fix the needle bar 9 on the pipe cap 3; meanwhile, the gas-liquid balance in the cotton swab is broken, and the extraction reagent 6 flows to the front end of the cotton swab along the hollow swab rod 4 to infiltrate the cotton head 5, so that the liquid reagent is automatically injected without cross contact; the trace biological evidence can be lifted by unscrewing the tube cap 3 and drawing out the cotton swab 1; after the lifting is finished, the cotton swab 1 is put back into the tube body 2, the tube cap 3 is screwed, and the drying agent bag 13 in the tube keeps the drying in the tube for a long time, so that effective DNA is not degraded by the interference of substances such as water in the air, enzymes and the like; when the cotton swab 1 collects a sample and is sent to a laboratory for inspection, the cotton swab head can be conveniently folded down by exerting force on the position of the easily-folded groove 14, and the cotton swab head is put into the extraction device for operation.
Claims (7)
1. The firing pin type micro-material evidence extraction device comprises a cotton swab and a sleeve, wherein the sleeve consists of a tube body and a tube cap, the tail end of a swab rod of the cotton swab is inserted into the center of the inner bottom surface of the tube cap and is sealed in the tube body; the method is characterized in that: the cotton swab comprises a hollow swab rod, a cotton head, an extraction reagent and a sealing film, wherein the cotton head is wound at the front end of the hollow swab rod, the sealing film is stuck at the rear end of the hollow swab rod, the extraction reagent is filled in the hollow swab rod, and the extraction reagent is kept in relative static balance with the cotton head under the cooperation of the sealing film through the air barrier in the hollow swab rod; the center of the outer surface of the pipe cap is inserted with a firing pin, the firing pin is coaxial with the center of the hollow stick rod, and a certain distance is reserved between the front end of the firing pin and the sealing film of the cotton stick.
2. The striker type micro-material evidence extraction device according to claim 1, characterized in that: the firing pin comprises a needle rod, a thimble and a pushing cap, wherein the front end of the needle rod is provided with the thimble, the rear end of the needle rod is provided with the pushing cap, and the thimble points to the center of the sealing film.
3. The striker type micro-material evidence extraction device according to claim 2, characterized in that: the needle bar is provided with a position barb positioned in front of the push cap.
4. The striker type micro-material evidence extraction device according to claim 2, characterized in that: the hollow stick rod is provided with a frangible groove near the cotton head.
5. The striker type micro-material evidence extraction device according to claim 1, characterized in that: a desiccant bag is placed in the front cavity of the tube body.
6. The striker type micro-material evidence extraction device according to claim 1, characterized in that: the outer wall surface of the pipe body is sprayed with a tracking code.
7. The striker type micro-material evidence extraction device according to claim 1, characterized in that: the outer surface of the pipe cap is provided with a nameplate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321970650.XU CN220432830U (en) | 2023-07-26 | 2023-07-26 | Firing pin type micro-material evidence extracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321970650.XU CN220432830U (en) | 2023-07-26 | 2023-07-26 | Firing pin type micro-material evidence extracting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220432830U true CN220432830U (en) | 2024-02-02 |
Family
ID=89688585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321970650.XU Active CN220432830U (en) | 2023-07-26 | 2023-07-26 | Firing pin type micro-material evidence extracting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220432830U (en) |
-
2023
- 2023-07-26 CN CN202321970650.XU patent/CN220432830U/en active Active
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