CN212255038U

CN212255038U - Trace fiber material evidence save set

Info

Publication number: CN212255038U
Application number: CN202020849247.1U
Authority: CN
Inventors: 胡灿; 朱军; 梅宏成; 郭洪玲
Original assignee: Institute of Forensic Science Ministry of Public Security PRC
Current assignee: Institute of Forensic Science Ministry of Public Security PRC
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-12-29
Anticipated expiration: 2030-05-20

Abstract

The utility model relates to a trace fiber material evidence preservation device, which comprises a sample plate, a protective film and a sample bottle; the protective film is attached to the top of the sample plate, the sample plate attached with the protective film is placed in the sample bottle, and the inner diameter of the sample bottle is larger than the width of the sample plate; a plurality of parallel double-sided adhesive tapes are arranged on the sample plate along the direction of the transverse shaft, and the fiber sample is placed perpendicular to the double-sided adhesive tapes; a space is formed between the adjacent double-sided adhesive tapes, and the space positioned in the middle is smaller than other spaces; the blank area between the double-sided adhesive tapes is a test area for directly carrying out MSP, polarized light and Raman analysis. The utility model discloses can be convenient preserve trace fibre material evidence, can obtain level and smooth fibrous surface again, directly be used for micro-beam splitting, polarized light and raman analysis to reduce the transfer of sample, be suitable for the save and the analysis of trace fibre material evidence in the case.

Description

Trace fiber material evidence save set

Technical Field

The utility model relates to a court science trace material evidence technical field especially relates to a trace fibre material evidence save set.

Background

The fiber is an important trace material evidence and is commonly used in cases of causing traffic accidents, murder and the like. The inspection of the fiber material evidence plays an important role in associating case-related places, case-related tools and case-related personnel. Fiber material evidence extracted from a case is very trace, and related inspection items are many, including analyzing fiber color by a micro-spectrophotometry method, analyzing fiber types by a polarized light microscope and an infrared spectrum method, analyzing dye by a Raman spectroscopy method and the like. Under the condition of limited fiber quantity, the same fiber needs to be used for repeatedly carrying out multiple tests, and the process can involve multiple transfers of fiber material evidence and sample pretreatment. On one hand, the fiber material evidence needs to be fixed to prevent loss and cross contamination; on the one hand, the kit can be directly used for subsequent multiple tests so as to reduce the transfer of samples.

At present, no special trace fiber material evidence storage device exists, the fiber material evidence is directly arranged in a material evidence bag, and a great amount of time is consumed to search the trace fiber material evidence under a microscope; or adhered to the tape, the fibers need to be removed from the tape again during analysis, and the adhesive interferes with the analysis of the fibers.

Disclosure of Invention

To the above problem, the utility model aims at providing a trace fibre material evidence save set, the device can directly be used for detecting, and do not disturb the detection.

In order to achieve the purpose, the utility model adopts the following technical proposal: a trace fiber material evidence preservation device comprises a sample plate, a protective film and a sample bottle; the protective film is attached to the top of the sample plate, the sample plate attached with the protective film is placed in the sample bottle, and the inner diameter of the sample bottle is larger than the width of the sample plate; a plurality of parallel double-sided adhesive tapes are arranged on the sample plate along the direction of the transverse shaft, and the fiber sample is placed perpendicular to the double-sided adhesive tapes; a space is formed between the adjacent double-sided adhesive tapes, and the space positioned in the middle is smaller than other spaces; the blank area between the double-sided adhesive tapes is a test area for directly carrying out MSP, polarized light and Raman analysis.

Preferably, the double-sided adhesive tape is provided in four strips.

Preferably, a plurality of separation lines for separating and positioning the fiber samples are arranged at intervals along the longitudinal axis direction in the middle space.

Preferably, the distance between adjacent separation lines is 5mm to 10 mm.

Preferably, the sample plate is made of glass or quartz.

Preferably, the sample plate has a rectangular structure.

Preferably, the protective film is made of transparent plastic, and the shape and the size of the protective film are arranged corresponding to the sample plate.

Preferably, one end of the protective film is provided with a semicircular extending part which is integrally formed with the protective film.

Preferably, the sample bottle is a transparent cylinder.

Preferably, the outer side wall of the sample bottle is provided with a marking area.

The utility model discloses owing to take above technical scheme, it has following advantage: 1. the utility model discloses save trace fibre material evidence that can be convenient prevents losing and cross contamination of fibre material evidence, can also obtain level and smooth fibrous surface simultaneously, can directly be used to MSP, polarized light and raman analysis to reduce the transfer of sample, be suitable for the save and the analysis of trace fibre material evidence in the case. 2. The utility model discloses low in production cost, easy operation is convenient, is suitable for popularization and application. 3. The sample stage of the utility model can also be used for storing other trace material evidences.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2a is a schematic view of a sample plate according to the present invention in use;

figure 2b is a schematic view of the sample plate being loaded into a sample vial during use of the invention.

Detailed Description

In the description of the present invention, it should be understood that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1, the utility model provides a trace fibre material evidence save set, it includes sample board 1, protection film 2 and sample bottle 3. The top of the sample plate 1 is pasted with the protective film 2, the sample plate 1 pasted with the protective film 2 is placed in the sample bottle 3, and the inner diameter of the sample bottle 3 is slightly larger than the width of the sample plate 1, so as to accommodate the sample plate 1.

Wherein, a plurality of double-sided adhesive tapes 4 arranged in parallel are arranged on the sample plate 1 along the direction of a transverse shaft and are used for fixing a fiber sample; in use, the fiber sample is placed perpendicular to the double-sided tape 4. The double-sided adhesive tapes 4 are preferably arranged in four, three intervals are formed among the four double-sided adhesive tapes 4, and the interval in the middle is smaller than the intervals on the two sides. The blank area between the double-sided adhesive tape 4 is a test area 5 which can directly carry out micro-spectroscopic (MSP), polarized light and Raman analysis.

In a preferred embodiment, the double-sided tape 4 is not limited in size, and preferably has a length of 60mm, a width of 1mm, and a thickness of 0.01 mm; the spacing between the middle is preferably 2mm and the spacing between the sides is preferably 12 mm.

In a preferred embodiment, a plurality of separation lines 6 are arranged at intervals along the longitudinal axis direction in the middle space, and the fiber samples are separated and positioned through the separation lines 6; the spacing between adjacent separation lines 6 is preferably 5mm to 10 mm.

In a preferred embodiment, the sample plate 1 is made of glass or quartz, and has a rectangular structure with an unlimited size, preferably 20 × 75 mm; the thickness is less than 2mm, preferably 1 mm.

In the above embodiments, the protective film 2 is made of transparent plastic and has a shape and a size corresponding to the sample plate 1. A semicircular extension part 7 is integrally formed at one end of the protective film 2, and the protective film 2 can be conveniently lifted from the sample plate 1 through the extension part 7.

In the above embodiments, the sample bottle 3 is a transparent cylinder, and the material is not limited. And a marking area 8 is arranged on the outer side wall of the sample bottle 3, and the sample information can be recorded by writing in the marking area 8 through a marking pen.

To sum up, the present invention can be directly used for MSP, polarized light and raman analysis, for example, using a 20 × 75 × 1mm quartz plate as the sample plate 1, and four 1 × 60 × 0.01mm double-sided tapes 4 adhered thereon for fixing fiber material evidence, as shown in fig. 2a and 2 b. The distance between the two middle double-sided adhesive tapes 4 is shorter, only 2mm, and is used for fixing shorter fiber samples, and the distance between the double-sided adhesive tapes 4 at the two ends is 12mm, so that longer fiber samples can be fixed. The middle of the sample plate 1 is provided with separation lines 6 along the long axis direction, the separation lines 6 are 5mm apart, different fiber samples can be separated, and the positioning function is realized. The fiber sample is placed perpendicular to the double-sided adhesive tape, and blank areas between the adhesive tapes can be used as a test area 5 for MSP, Raman and polarization microscope analysis. The inner diameter of the sample bottle 3 is 22mm, and as shown in fig. 2b, the sample plate 1 is placed in the sample bottle 3, so that the sample plate 1 can be conveniently taken and placed, and meanwhile, the pollution of dust and the like is avoided.

The specific use steps of the trace fiber preservation device are as follows:

(1) fiber fixation: and (3) opening the protective film 2 on the sample plate 1, fixing the two ends of the fiber sample on the double-sided adhesive tape 4 of the sample plate 1 respectively, and placing the fiber sample perpendicular to the double-sided adhesive tape 4.

(2) Fiber analysis: the sample plate 1 was placed directly under MSP, Raman and polarized light microscope, and the fiber sample was found in the blank area without the double-sided tape 4 for testing. When infrared spectroscopy and other analysis are subsequently carried out, a scalpel can be used for cutting fibers of the part which is not adhered with the double-sided adhesive tape 4 for relevant tests.

(3) And (3) fiber preservation: the sample plate 1 is loaded into the sample bottle 3, and sample information is written in the mark area 8.

Above-mentioned each embodiment only is used for explaining the utility model discloses, the structure, size, the setting position and the shape of each part all can change to some extent on the basis of the technical scheme of the utility model discloses on the basis of technical scheme, all according to the utility model discloses the principle is to the improvement and the equivalence transform that individual part goes on, all should not exclude the utility model discloses a protection scope is outside.

Claims

1. A trace fibre material evidence save set which characterized in that: comprises a sample plate, a protective film and a sample bottle; the protective film is attached to the top of the sample plate, the sample plate attached with the protective film is placed in the sample bottle, and the inner diameter of the sample bottle is larger than the width of the sample plate;

a plurality of parallel double-sided adhesive tapes are arranged on the sample plate along the direction of the transverse shaft, and the fiber sample is placed perpendicular to the double-sided adhesive tapes; a space is formed between the adjacent double-sided adhesive tapes, and the space positioned in the middle is smaller than other spaces; the blank area between the double-sided adhesive tapes is a test area for directly carrying out MSP, polarized light and Raman analysis.

2. The apparatus of claim 1, wherein: the number of the double-sided adhesive tapes is four.

3. The apparatus of claim 1, wherein: and a plurality of separation lines for separating and positioning the fiber samples are arranged at intervals along the longitudinal axis direction in the middle space.

4. The apparatus of claim 3, wherein: the distance between the adjacent separation lines is 5 mm-10 mm.

5. The apparatus of claim 1, wherein: the sample plate is made of glass or quartz.

6. The apparatus of claim 5, wherein: the sample plate is of a rectangular structure.

7. The apparatus of claim 1, wherein: the protective film is made of transparent plastic, and the shape and the size of the protective film are arranged corresponding to the sample plate.

8. The apparatus of claim 1 or 7, wherein: one end of the protective film is provided with a semicircular extending part which is integrally formed with the protective film.

9. The apparatus of claim 1, wherein: the sample bottle is a transparent cylinder.

10. The apparatus of claim 9, wherein: and a marking area is arranged on the outer side wall of the sample bottle.