CN109520766B - A combined tube for field sampling - Google Patents

Abstract

The invention discloses a combined tube for field sampling, which comprises an outer tube, a middle tube and an inner tube, wherein the middle tube and the inner tube are nested and integrally placed in the outer tube, the middle tube and the inner tube are positioned through circumferential positioning grooves, an outer tube upper cover is arranged at the top of the outer tube through an outward opening rotating shaft, a slide buckle is arranged on the outer tube upper cover, an inner tube upper cover is arranged at the top of the inner tube, and a cap peak matched with the slide buckle is arranged on the inner tube upper cover; through the design of the slide fastener, the inner pipe, the outer pipe and the middle pipe can be independently or integrally opened, so that the storage mode and the extraction mode of the on-site extract can be independently selected; the height difference between the outer tube and the inner tube is arranged to facilitate the clamping and breaking of the cotton swab extracting tool.

Description

A combined tube for field sampling

Technical Field

The invention relates to the field of on-site collection equipment, in particular to a combined tube for on-site sampling.

Background technique

Investigators usually use the naked eye, magnifying glasses, stereo microscopes and other tools to collect evidence at the crime scene, and use scientific and technological means or methods such as recording, drawing, photography, etc. to extract, package, fix and properly preserve the evidence information, turning it into clues to solve the case, while better restoring the crime scene and increasing the efficiency of solving the case. At the same time, investigators in the new era must master certain modern science and technology, apply specialized technical equipment, such as laser, space, infrared, X-ray, remote sensing technology and other advanced technologies, and unify them with other evidence at the scene to help solve the case. Investigators must collect and analyze evidence at the crime scene, and use a combination of methods such as marking, recording, covering, transfer, bridging, and extraction to protect trace items;

However, when using cotton swabs or the like to collect samples at various crime scenes, human contamination often occurs during the sampling process. Existing sampling tubes are usually single-tube or double-tube structures. Single-tube structures have the problem of the outer wall of the tube being contaminated and the sample needing to be transferred a second time. Although the double-tube structure solves the problem of secondary sample transfer, it often leads to secondary contamination due to hand contact, and in severe cases, it can lead to unexpected sample contamination, making it impossible to correctly extract biological traces at the crime scene.

Summary of the invention

In order to overcome the deficiencies of the prior art solutions, the present invention provides a combined tube for on-site sampling, which can effectively solve the problems raised by the background technology.

The technical solution adopted by the present invention to solve its technical problem is:

A combined tube for on-site sampling comprises an outer tube, a middle tube and an inner tube, wherein the outer tube, the middle tube and the inner tube are positioned by positioning grooves, an outer tube upper cover is mounted on the top of the outer tube via an outwardly opening rotating shaft, and a sliding buckle is arranged on the outer tube upper cover, an inner tube upper cover is mounted on the top of the inner tube, and a visor matching the sliding buckle is arranged on the inner tube upper cover.

Furthermore, an inner opening rotating shaft is arranged on the inner tube upper cover corresponding to the position of the brim, and the inner opening rotating shaft extends out of the outer tube upper cover and is buckled in the middle of the outer opening rotating shaft.

Furthermore, an inner protrusion is provided on the lower surface of the outer tube upper cover, a buckle is provided on the outer tube upper cover located on one side of the inner protrusion, and an outer protrusion is provided at the edge of the tube opening of the inner tube upper cover.

Furthermore, the position of the outer protrusion located at the bottom of the inner tube upper cover is higher than the position of the inner protrusion located at the outer tube upper cover.

Furthermore, the nested whole of the middle tube and the inner tube is placed in the outer tube.

Furthermore, a button hole is provided at the bottom of the slide buckle, and the button hole matches the brim of the cap.

Furthermore, a positioning pin matching the positioning groove provided at the pipe mouth of the middle tube is provided on the outer wall of the inner tube, and a positioning pin is provided on the side wall of the middle tube located at the bottom of the positioning groove on the middle tube. The outer tube and the middle tube, and the middle tube and the inner tube are positioned through the circumference and the positioning groove.

Furthermore, when the brim on the inner tube enters the buckle hole on the sliding buckle, the two are combined, and the outer tube upper cover and the inner tube upper cover are in a state of being opened or closed at the same time.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The present invention realizes multi-layer isolation of the evidence collected on the scene when closed through the combined structure of the three-combination pipe, thereby avoiding secondary contamination of the evidence on the scene during operation.

(2) The present invention uses a sliding buckle design to enable the inner tube, the outer tube and the middle tube to be opened independently or as a whole, so that the storage method and extraction method of the on-site extract can be independently selected.

(3) The height difference between the outer tube and the inner tube of the present invention facilitates the disconnection of cotton swab-like extraction tools.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of an overall half-section three-dimensional structure of the present invention;

FIG2 is a schematic diagram of the three-dimensional structure of the outer tube portion of the present invention;

FIG3 is a schematic diagram of the inner tube structure of the present invention;

FIG4 is a schematic diagram of the three-dimensional structure of the middle tube of the present invention;

FIG. 5 is a schematic diagram of the sliding buckle structure of the present invention.

Numbers in the figure:

1-outer tube; 2-middle tube; 3-inner tube; 4-positioning groove; 5-outer opening shaft; 6-outer tube upper cover; 7-sliding buckle; 8-inner tube upper cover; 9-cap visor; 10-inner opening shaft; 11-inner protrusion; 12-buckle; 13-outer protrusion; 14-buckle hole.

Detailed ways

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

As shown in Figures 1 to 5, the present invention provides a combination tube for on-site sampling, including an outer tube 1, a middle tube 2 and an inner tube 3. The middle tube 2 and the inner tube 3 are nested and placed in the outer tube 1, and the outer tube 1, the middle tube 2 and the inner tube 3 are positioned by a circumferential positioning groove 4. The top of the outer tube 1 is equipped with an outer tube cover 6 through an outward-opening rotating shaft 5, and the outer tube cover 6 is provided with a sliding buckle 7. The top of the inner tube 3 is equipped with an inner tube cover 8, and the inner tube cover 8 is provided with a visor 9 matching the sliding buckle 7.

The combined tube is composed of an inner tube 3, a middle tube 2 and an outer tube 1, and is mainly used for on-site sampling by public security organs. After the public security personnel collect biological traces with a cotton swab, the outer tube cover 6 of the outer tube 1 is opened, and the inner tube 3 is also opened at the same time due to the locking function of the sliding buckle 7. After the cotton swab head is placed in the inner tube 3, the outer tube cover 6 is closed, and the cotton swab is cut off by the synchronously closed inner tube, and then the combined tube is closed;

When the combined tube is brought back to the sample processing room, the sliding buckle 7 of the outer tube upper cover 6 is slid to the disengagement position, the inner tube upper cover 8 and the outer tube upper cover 6 are separated, the outer tube upper cover 6 is opened, and the samples in the inner tube 2 and the middle tube 3 are taken out with laboratory tools and placed in the nucleic acid extraction workstation or instrument for nucleic acid extraction and purification operations.

An inner opening rotating shaft 10 is arranged on the inner tube upper cover 8 which is just opposite to the position of the cap brim 9 , and the inner opening rotating shaft 10 extends out of the outer tube upper cover 6 and is buckled in the middle of the outer opening rotating shaft 5 .

An inner protrusion 11 is provided on the lower surface of the outer tube upper cover 6, a buckle 12 is provided on the outer tube upper cover 6 located on one side of the inner protrusion 11, an outer protrusion 13 is provided at the edge of the tube opening of the inner tube upper cover 8, and the position of the outer protrusion 13 is higher than that of the inner protrusion 11.

A button hole 14 is provided at the bottom of the sliding buckle 7 , and the button hole 14 matches with the cap brim 9 .

The outer tube 1 of the present invention completely covers the middle tube 2 and the inner tube 3, thereby avoiding contamination of the middle tube 2 and the inner tube 3 during the sampling process.

The outer tube 1 of the present invention is provided with a slide buckle 7, and a buckle hole 14 is provided on the slide buckle 7 structure. The bottle cap of the inner tube 3 is provided with a cap brim 9. When the buckle hole 14 on the slide buckle 7 and the cap brim 9 on the inner tube are disengaged, the outer tube upper cover 6 of the outer tube 1 can be opened separately, and the middle tube 2 and the inner tube 3 can be put in and taken out at this time; when the cap brim 9 on the inner tube 3 enters the buckle hole 14 on the slide buckle 7, the two are combined, and the inner tube upper cover 8 and the outer tube upper cover 6 are opened or closed at the same time, and the sample can be put in at this time.

The outer tube 1 and the inner tube 3 of the present invention are both provided with a protruding protrusion structure. The inner protrusion 11 structure on the outer tube upper cover 6 is used for guiding when the outer tube upper cover 6 is closed. The outer protrusion 13 of the inner tube upper cover 8 is used for sealing the inner tube upper cover 8 and breaking the sampling cotton swab. The outer protrusion 13 structure of the inner tube upper cover 8 is higher than the inner protrusion 11 structure of the outer tube upper cover 6. In this way, it is ensured that when the sampling cotton swab is broken, the outer tube upper cover 6 does not contact the cotton swab, and the normal breaking of the cotton swab is not affected.

It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims (6)

1. A combination tube for in-situ sampling, characterized by: the novel inner tube comprises an outer tube (1), a middle tube (2) and an inner tube (3), wherein the outer tube (1), the middle tube (2) and the inner tube (3) are positioned through a positioning groove (4), an outer tube upper cover (6) is arranged at the top of the outer tube (1) through an outward opening rotating shaft (5), a slide fastener (7) is arranged on the outer tube upper cover (6), an inner tube upper cover (8) is arranged at the top of the inner tube (3), a cap bill (9) matched with the slide fastener (7) is arranged on the inner tube upper cover (8), the middle tube (2) and the inner tube (3) are nested and integrally arranged in the outer tube (1), and the outer tube (1) completely covers the middle tube (2) and the inner tube (3);

The positioning pin matched with the positioning groove (4) arranged at the pipe orifice of the middle pipe (2) is arranged on the outer side wall of the inner pipe (3), the positioning pin is arranged on the middle pipe side wall of the right bottom of the positioning groove (4) on the middle pipe (2), and the outer pipe (1) and the middle pipe (2), the middle pipe (2) and the inner pipe (3) are positioned through the circumference and the positioning groove (4).

2. A combination pipe for in-situ sampling as claimed in claim 1, wherein: an inner opening rotating shaft (10) is arranged on the inner tube upper cover (8) at the position corresponding to the cap peak (9), and the inner opening rotating shaft (10) extends out of the outer tube upper cover (6) to be buckled in the middle of the outer opening rotating shaft (5).

3. A combination pipe for in-situ sampling as claimed in claim 1, wherein: the lower surface of outer tube upper cover (6) is provided with interior arch (11), is provided with buckle (12) on outer tube upper cover (6) that are located interior arch (11) one side, the mouth of pipe edge department of inner tube upper cover (8) is provided with outer arch (13).

4. A combination pipe for in-situ sampling as defined in claim 3, wherein: the outer bulge (13) at the bottom of the inner tube upper cover (8) is positioned higher than the inner bulge (11) at the outer tube upper cover.

5. A combination pipe for in-situ sampling as claimed in claim 1, wherein: the bottom of the slide fastener (7) is provided with a fastening hole (14), and the fastening hole (14) is matched with the cap bill (9).

6. A combination pipe for in-situ sampling as claimed in claim 1, wherein: when the cap bill (9) on the inner tube (3) enters the buckling hole (14) on the slide buckle (7), the cap bill and the slide buckle are combined, and the outer tube upper cover (6) and the inner tube upper cover (8) are in a state of being opened or closed simultaneously.