CN215480856U

CN215480856U - Trace DNA extraction element

Info

Publication number: CN215480856U
Application number: CN202121802203.4U
Authority: CN
Inventors: 刘继强; 张珊珊; 孙志彬; 邵瑞莲; 丁长欢; 余丹
Original assignee: Tianjin Compson Inspection And Testing Co ltd
Current assignee: Tianjin Compson Inspection And Testing Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-01-11
Anticipated expiration: 2031-08-03

Abstract

The utility model provides a trace DNA extraction device, which relates to the technical field of DNA extraction devices and comprises a storage mechanism, wherein the storage mechanism comprises a storage rod, a storage groove is formed in the storage rod, an extraction mechanism is arranged in the storage groove, the extraction mechanism comprises an extraction tube, a clamping hole is formed in the storage rod, and one end of the extraction tube is movably clamped in the clamping hole. The length of the containing mechanism is prolonged in a rotating mode, the containing mechanism can be used when standing conveniently, in addition, gaps at each corner of the site can be conveniently extracted, the first air bag extrusion pushing plug reciprocates to perform extraction work by pressing the first pressing rod and the second pressing rod, the extract flows in from the flow guide inclined tube after negative pressure absorption, the extract flows in the collecting tube after impurities are filtered by the filter screen to be conveniently delivered and inspected, the rotating rod is rotated to enable the clamping groove to be clamped with the first pressing rod, the device can be folded, contained, space is saved, carrying is convenient, and the dustproof soft plate is reset to avoid a large amount of dust entering the containing groove.

Description

Trace DNA extraction element

Technical Field

The utility model relates to the technical field of DNA extraction devices, in particular to a trace DNA extraction device.

Background

In the criminal case investigation process, the criminal scene needs to be surveyed, and trace DNA extraction work such as trace blood, fingerprints, body fluid, saliva and the like needs to be carried out on the scene, so that the criminal case detection work can be conveniently carried back to a laboratory for detection and analysis, and the criminal case solving work can be helped by case handling personnel.

However, in the prior art, the existing trace DNA extraction device is small in size and inconvenient for workers to use when standing, however, fine details of an outdoor acquisition site can play a great role in promoting the progress of a case, squat and search detailed clues on the outdoor acquisition site increase the labor intensity of the workers, and the workers are inconvenient to conveniently extract gaps of all corners on the site.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art, the existing trace DNA extraction device is small in size and inconvenient for workers to use when standing, however, fine details of an outdoor acquisition site can have a great pushing effect on the schedule of a case, squat and search detailed clues on the outdoor acquisition site increase the labor intensity of the workers, and the workers are inconvenient to extract gaps of all corners on the site.

In order to achieve the purpose, the utility model adopts the following technical scheme: including receiving mechanism, receiving mechanism is including accomodating the pole, accomodating the inside of pole and having seted up and accomodate the groove, the inside of accomodating the groove is provided with draws the mechanism, it includes the extraction tube to draw the mechanism, the joint hole has been seted up to the inside of accomodating the pole, the one end activity joint of extraction tube is in the inside in joint hole.

As a preferred embodiment, a cover plate is disposed on one side of the storage groove, one side of the bottom of the cover plate is hinged to the storage rod, and a sliding groove is formed in the storage groove.

As a preferred embodiment, a first air bag is arranged inside the clamping hole, a pushing plug is fixedly connected to one side of the first air bag close to the extraction tube, and the outer diameter of the pushing plug is equal to the inner diameter of the extraction tube.

As a preferred embodiment, the inner part of the sliding groove is slidably clamped with a soft dustproof plate, and the inner surfaces of the accommodating groove and the cover plate are symmetrically provided with fixed blocks.

As a preferred embodiment, one side of the extraction pipe, which is far away from the cover plate, is fixedly connected with a flow guide inclined pipe, a filter screen is arranged inside the flow guide inclined pipe, and one end of the flow guide inclined pipe, which is far away from the extraction pipe, is provided with a collection pipe in a threaded manner.

As a preferred embodiment, the upper side and the lower side of the first air bag are both fixedly connected with a first pressing rod, the opposite side of one end of the first pressing rod, which is far away from the extraction tube, is both rotatably connected with a second pressing rod, the joint of the first pressing rod and the second pressing rod on both sides is connected with a connecting shaft in a penetrating manner, a spring is arranged in the middle of the connecting shaft, the outer wall of the connecting shaft is connected with a rotating rod in a penetrating manner, one side of the rotating rod, which is close to the collection tube, is provided with a clamping groove, and the adjacent side of one end of the rotating rod, which is far away from the first pressing rod, is fixedly connected with a second air bag.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. in the utility model, when in suction, the second pressing rods on two sides are held by hands and are pressed towards the opposite sides, at the moment, the first pressing rods and the second pressing rods are close to each other under the action of the spring in the middle of the connecting shaft and extrude the first air bag and the second air bag, the second air bag is used for keeping the second pressing rods horizontally and relatively extruded when in pressing, the second air bag drives the pushing plug to discharge a part of gas in the extraction tube after being extruded, the suction port of the extraction tube is aligned to a region to be extracted, the extrusion on the second pressing rods is stopped, the pushing plug is reset, the extract flows in from the diversion inclined tube after negative pressure suction, in order to prevent a large amount of impurities from being remained in the extract, the extract flows in the collection tube after being filtered by the filter screen and is convenient to be sent, the extraction tube adopts a disposable article, and prevents various extracts from being mixed and disturbing the detection work.

2. According to the utility model, the cover plate is rotated to open, the dustproof soft plate slides to one side of the containing rod through the sliding groove, the extraction tube in the extraction mechanism is placed in the containing groove, the suction end of the extraction tube exceeds the containing rod when the device is used, the other end of the extraction tube is movably clamped with the clamping hole, the extraction tube is prevented from rotating and falling off by the aid of the fixing blocks symmetrically arranged on the inner surfaces of the containing groove and the cover plate, the rotating rod rotates anticlockwise around the connecting shaft as a circle center and is in the same horizontal direction with the first pressing rod, the length of the containing mechanism is prolonged, the device is convenient for workers to use when standing, and the extraction of all corner gaps of an outdoor collection site is facilitated, so that the working strength of the workers is reduced.

Drawings

FIG. 1 is a perspective view of a micro DNA extracting apparatus according to the present invention;

FIG. 2 is a perspective view of a storage state of a micro DNA extracting apparatus according to the present invention;

FIG. 3 is a perspective view showing the extended state of the receiving rod and the cover plate of the micro DNA extracting apparatus according to the present invention;

FIG. 4 is a partial sectional view of an extraction mechanism of a micro DNA extraction apparatus according to the present invention.

Illustration of the drawings:

1. a storage mechanism; 2. an extraction mechanism;

11. a storage rod; 12. a cover plate; 13. a receiving groove; 14. a first pressing lever; 15. a rotating rod; 16. a second pressing lever; 17. a connecting shaft; 18. a second air bag; 19. a clamping hole;

21. an extraction tube; 22. a flow guiding inclined pipe; 23. a collection tube; 24. filtering with a screen; 25. a first air bag; 26. pushing the plug;

131. a chute; 132. a dust-proof soft board; 133. a fixed block; 151. a clamping groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 4, the present invention provides a technical solution: the utility model provides a trace DNA extraction element, including receiving mechanism 1, receiving mechanism 1 is including accomodating pole 11, accomodate the inside of pole 11 and seted up and accomodate groove 13, the inside of accomodating groove 13 is provided with draws mechanism 2, it includes extraction tube 21 to draw mechanism 2, joint hole 19 has been seted up to the inside of accomodating pole 11, the one end activity joint of extraction tube 21 is in the inside of joint hole 19, the inside of joint hole 19 is provided with first air bag 25, one side fixedly connected with that first air bag 25 is close to extraction tube 21 pushes away and moves stopper 26, and the external diameter that pushes away stopper 26 equals with the internal diameter of extraction tube 21, one side fixedly connected with water conservancy diversion pipe chute 22 that apron 12 was kept away from to extraction tube 21, the inside of water conservancy diversion pipe chute 22 is provided with filter screen 24, the one end screw thread that extraction tube 21 was kept away from to water conservancy diversion pipe chute 22 is installed and is gathered pipe 23.

In this embodiment, the second pressing rods 16 on both sides are held by hand and pressed towards the opposite sides during suction, at this time, the first pressing rods 14 and the second pressing rods 16 are closed and press the first air bags 25 and the second air bags 18 under the action of the spring in the middle of the connecting shaft 17, the second air bags 18 are used for keeping the second pressing rods 16 horizontally and relatively pressed when pressed, the second air bags 18 are pressed to drive the pushing plugs 26 to discharge a part of gas in the extraction pipe 21, the suction ports of the extraction pipe 21 are aligned with the region to be extracted, the pressing on the second pressing rods 16 is stopped, the pushing plugs 26 are reset, the extract flows in from the diversion inclined pipe 22 after negative pressure suction, in order to prevent a large amount of impurities from remaining in the extract, the extract flows into the collection pipe 23 after being filtered by the filter screen 24 for convenient inspection, the extraction pipe 21 is a disposable product, so as to prevent a plurality of extracts from mixing and disturbing the inspection work.

Example 2

As shown in fig. 1 to 4, a cover plate 12 is disposed on one side of the storage groove 13, one side of the bottom of the cover plate 12 is hinged to the storage rod 11, a sliding groove 131 is formed in the storage groove 13, a dust-proof soft plate 132 is slidably clamped in the sliding groove 131, fixing blocks 133 are symmetrically disposed on the inner surfaces of the storage groove 13 and the cover plate 12, first pressing rods 14 are fixedly connected to the upper side and the lower side of each first air bag 25, a second pressing rod 16 is rotatably connected to the opposite side of one end, away from the extraction tube 21, of each first pressing rod 14, a connecting shaft 17 is connected to the joint of the first pressing rods 14 and the second pressing rod 16 on the two sides in a penetrating manner, a spring is disposed in the middle of the connecting shaft 17, a rotating rod 15 is connected to the outer wall of the rotating rod 15 in a penetrating manner, a clamping groove 151 is formed in one side of the rotating rod 15, close to the collection tube 23, and a second air bag 18 is fixedly connected to the adjacent side of one end, away from the first pressing rod 14, of the rotating rod 15.

In this embodiment, the cover plate 12 is rotated to open, the dust-proof soft plate 132 slides to one side of the receiving rod 11 through the sliding slot 131, the extraction tube 21 in the extraction mechanism 2 is placed in the receiving slot 13, the suction end of the extraction tube 21 exceeds the receiving rod 11 when in use, the other end is movably clamped with the clamping hole 19, the extraction tube 21 is prevented from rotating and falling off by the fixing blocks 133 symmetrically arranged on the inner surfaces of the receiving slot 13 and the cover plate 12, the rotating rod 15 rotates counterclockwise around the connecting shaft 17 as a circle center and is in the same horizontal direction with the first pressing rod 14, the length of the receiving mechanism 1 is extended, and the use is convenient for a worker to stand, and is convenient to take out the gaps at each corner on site, when not in use, the rotating rod 15 is rotated to clamp the clamping groove 151 with the first pressing rod 14, make the device can fold and accomodate and save space and conveniently carry, dustproof soft board 132 resets and avoids accomodating and gets into a large amount of dusts in the groove 13.

The working principle of the embodiment is as follows:

as shown in fig. 1-4, the cover plate 12 is rotated to open, the dust-proof soft plate 132 slides to one side of the receiving rod 11 through the sliding slot 131, the extraction tube 21 in the extraction mechanism 2 is placed in the receiving slot 13, when in use, the absorption end of the extraction tube 21 exceeds the receiving rod 11, the other end is movably clamped with the clamping hole 19, the extraction tube 21 is prevented from rotating and falling off by using the fixing blocks 133 symmetrically arranged on the inner surfaces of the receiving slot 13 and the cover plate 12, the rotating rod 15 rotates counterclockwise around the connecting shaft 17 as a circle center and is in the same horizontal direction with the first pressing rod 14, the length of the receiving mechanism 1 is prolonged, the extraction mechanism is convenient for workers to use when standing, and is convenient for extracting all corner gaps on site, when in need of absorption, the second pressing rods 16 on both sides are held by hands and pressed to the opposite sides, at this time, the first pressing rod 14 and the second pressing rod 16 are closed under the spring action in the middle of the connecting shaft 17 and press the first air bag 25 and the second air bag 18, the second air bag 18 is to keep the horizontal relative extrusion when making the second press the depression bar 16 press, the second air bag 18 drives the plug 26 that pushes away after receiving the extrusion and discharges a part with the interior gas of extraction tube 21, aim at the absorption mouth of extraction tube 21 and wait to extract the region, stop the extrusion to the second press the depression bar 16, push away the stopper 26 and reset, the extract flows in from water conservancy diversion pipe chute 22 after the negative pressure absorbs, for preventing remaining a large amount of impurity in the extract, flow into collection tube 23 after filter screen 24 filters impurity and conveniently inspect, the extraction tube 21 adopts disposable articles for use, prevent that multiple extract from mixing, disturb and detect work, when not using, rotate the bull stick 15 and make draw-in groove 151 and first press the depression bar 14 joint, make the device can fold and accomodate and save space and conveniently carry, dustproof soft board 132 resets and avoids accomodating a large amount of dust in the groove 13.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. A trace DNA extraction device, includes receiving mechanism (1), its characterized in that: receiving mechanism (1) is including taking in pole (11), take in the inside of pole (11) and seted up and accomodate groove (13), the inside of accomodating groove (13) is provided with draws mechanism (2), it includes extraction tube (21) to draw mechanism (2), joint hole (19) have been seted up to the inside of taking in pole (11), the one end activity joint of extraction tube (21) is in the inside of joint hole (19).

2. The apparatus for extracting a trace amount of DNA as claimed in claim 1, wherein: one side of the accommodating groove (13) is provided with a cover plate (12), one side of the bottom of the cover plate (12) is hinged to the accommodating rod (11), and a sliding groove (131) is formed in the accommodating groove (13).

3. The apparatus for extracting a trace amount of DNA as claimed in claim 1, wherein: the inside in joint hole (19) is provided with first gasbag (25), one side fixedly connected with that first gasbag (25) is close to extraction tube (21) pushes away stopper (26), just the external diameter that pushes away stopper (26) equals with the internal diameter of extraction tube (21).

4. The apparatus for extracting a trace amount of DNA as claimed in claim 2, wherein: the inside slip joint of spout (131) has dustproof soft board (132), the internal surface symmetry of accomodating groove (13) and apron (12) is provided with fixed block (133).

5. The apparatus for extracting a trace amount of DNA as claimed in claim 1, wherein: one side fixedly connected with water conservancy diversion pipe chute (22) of apron (12) are kept away from in extraction tube (21), the inside of water conservancy diversion pipe chute (22) is provided with filter screen (24), one end screw thread that extraction tube (21) were kept away from in water conservancy diversion pipe chute (22) is installed and is gathered pipe (23).

6. The apparatus for extracting a trace amount of DNA as claimed in claim 3, wherein: the equal first pressure pole (14) of fixedly connected with in upper and lower both sides of first gasbag (25), the first one end opposite side of keeping away from extraction tube (21) of pressure pole (14) is all rotated and is connected with second pressure pole (16), both sides first pressure pole (14) and the junction through connection of second pressure pole (16) have connecting axle (17), the middle part of connecting axle (17) is provided with the spring, the outer wall through connection of connecting axle (17) has bull stick (15), draw-in groove (151) have been seted up to one side that bull stick (15) are close to collection tube (23), the adjacent side fixedly connected with second gasbag (18) of one end that first pressure pole (14) were kept away from in bull stick (15).