CN209584221U

CN209584221U - Exfoliated cell extractor

Info

Publication number: CN209584221U
Application number: CN201920132546.0U
Authority: CN
Inventors: 董琪
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-25
Filing date: 2019-01-25
Publication date: 2019-11-05
Anticipated expiration: 2029-01-25

Abstract

It include centrifugal mechanism, adsorption head, filter membrane and battery compartment this application discloses a kind of exfoliated cell extractor.Centrifugal mechanism includes micro centrifuge, and micro centrifuge draws cast-off cells for generating negative pressure；Adsorption head is detachably inserted into one end of centrifugal mechanism；Filter membrane is removably installed in centrifugal mechanism, and filter membrane is located at one end that adsorption head is connected with centrifugal mechanism；Battery compartment is mounted on the other end of centrifugal mechanism, and battery compartment is used to power to micro centrifuge.The exfoliated cell extractor design of the utility model is rationally, simple and compact for structure, and by the negative pressure absorbing cast-off cells of centrifuge, for the cast-off cells of collection without the etch of acid or water, DNA stability is strong and is not easy to be degraded, to be conducive to the detection of DNA.

Description

Exfoliated cell extractor

Technical field

The utility model relates to micro field of biological extraction, in particular to a kind of exfoliated cell extractor.

Background technique

With the continuous development of science and technology, the counter-reconnaissance consciousness and ability of offender gradually increases, and leaves in scene of a crime Fingerprint and footprint it is fewer and fewer, the evidence obtaining for doing effective trace identification is also more and more difficult.DNA detection technique is that the police must can not Few detective work.As long as an advantage using DNA detection technique is that offender stopped at the scene, offender is touched The place crossed must leave its cast-off cells, to facilitate evidence obtaining；Another advantage is that the accuracy rate of DNA detection technique has reached To 99.999%, as long as offender can be checked and be locked to detection DNA graphs, the generation of misjudged case is reduced.Therefore, it uses DNA detection technique is the development trend of current technique of criminal investigation.The cast-off cells for extracting offender are one of DNA detection technique Key step.

For the cast-off cells that extraction criminal scene is left, there are mainly three types of technological means at present:

1) Adhesive-fetch device is viscous follows the example of, i.e., takes the cast-off cells for being retained in interface surface by the way that adhesive film is viscous.This method lacks Point be the pH value of acrylate viscose 6.5 or so, slant acidity, and the stability of DNA is best when pH value is 7.4, so If the cast-off cells of extraction are chemically examined not in time, DNA can be degraded.

2) cotton swab extraction method is stained with sterile water with cotton swab and increases its stickiness, then swabbing cast-off cells.The shortcomings that this mode It is that the rate of recovery of cast-off cells is low.

3) a wide range of adsorbing and extracting method, i.e., chemically examined in batches after being extracted using dust suction form large area.Due to extraction scope mistake Greatly, extract is excessively miscellaneous and easy to be contaminated, be easy to cause DNA map chaotic.

In criminal investigation, the extractive technique of cast-off cells is the technical bottleneck not broken through still at present.There is data to suggest that entirely The recall rate of state's case of criminal detection DNA inspection is only 15%.

Utility model content

Easily be degraded for above-mentioned DNA, the cast-off cells rate of recovery is low and the easily contaminated problem of extract, this is practical new Type proposes a kind of exfoliated cell extractor.

The technical solution that the utility model is taken is as follows:

A kind of exfoliated cell extractor includes centrifugal mechanism, adsorption head, filter membrane and battery compartment.Centrifugal mechanism includes micro- Type centrifuge, micro centrifuge draw cast-off cells for generating negative pressure；Adsorption head is detachably inserted into centrifugal mechanism One end；Filter membrane is removably installed in centrifugal mechanism, and filter membrane is located at one end that adsorption head is connected with centrifugal mechanism；Electricity Chi Cang is mounted on the other end of centrifugal mechanism, and battery compartment is used to power to micro centrifuge.

Further, centrifugal mechanism further includes pedestal and outer cover.Pedestal is equipped with venthole, and micro centrifuge is installed on In pedestal, battery compartment is mounted on one end of pedestal；Outer cover is mounted on the other end of pedestal.

Further, adsorption head includes needle-shaped adsorption head and tubular adsorbent head, one end of tubular adsorbent head and needle-shaped absorption Head is connected, and the other end of tubular adsorbent head is detachably inserted into outside outer cover.

Further, the top of needle-shaped adsorption head is round mouth, flat mouth or angle.

Further, pedestal is equipped with switch, and switch is electrically connected with micro centrifuge, switchs micro- for opening and closing Type centrifuge.

Further, battery compartment includes battery compartment ontology and battery compartment shell, and battery compartment shell can be placed on battery compartment ontology On.

The beneficial effects of the utility model are:

The exfoliated cell extractor design of the utility model is rationally, simple and compact for structure, passes through the negative pressure absorbing of centrifuge Cast-off cells, for the cast-off cells of collection without the etch of acid or water, DNA stability is strong, is not easy to be degraded, thus conducive to DNA's Detection.

The exfoliated cell extractor of the utility model uses needle-shaped adsorption head, and extraction scope is small, can extract tiny crack In cast-off cells, and extract is not easy to be contaminated.

Detailed description of the invention:

Fig. 1 is the structural schematic diagram of the utility model exfoliated cell extractor；

Fig. 2 is the explosive view of the utility model exfoliated cell extractor.

Each appended drawing reference in figure are as follows:

1, centrifugal mechanism；2, adsorption head；3, filter membrane；4, battery compartment；5, venthole；6, it switchs；11, micro centrifuge； 12, pedestal；13, outer cover；21, needle-shaped adsorption head；22, tubular adsorbent head；41, battery compartment ontology；42, battery compartment shell.

Specific embodiment:

Below with reference to each attached drawing, the utility model is described in detail.

As depicted in figs. 1 and 2, the utility model provides a kind of exfoliated cell extractor, exfoliated cell extractor include from Concentric mechanism 1, adsorption head 2, filter membrane 3 and battery compartment 4.Centrifugal mechanism 1 generate negative pressure absorbing cast-off cells, cast-off cells by 2 inspiration of adsorption head, is then attached on filter membrane 3.

Wherein, centrifugal mechanism 1 includes micro centrifuge 11, pedestal 12 and outer cover 13.Micro centrifuge 11 is installed on bottom In seat 12, battery compartment 4 is mounted on one end of pedestal 12, and outer cover 13 is mounted on the other end of pedestal 12.12 are equipped with outlet on pedestal Hole 5.Wherein, the micro centrifuge 11 uses miniature single-suction centrifuge.

Adsorption head 2 is detachably inserted into the one end of outer cover 13 far from pedestal 12, and filter membrane 3 is removably installed in outer cover In 13, filter membrane 3 is located at one end that outer cover 13 is connected with adsorption head 2.Filter membrane 3 is fallen off for collecting by what adsorption head 2 sucked Cell.

In this present embodiment, adsorption head 2 includes needle-shaped adsorption head 21 and tubular adsorbent head 22, one end of tubular adsorbent head 22 It is connected with needle-shaped adsorption head 21, the other end of tubular adsorbent head 22 is detachably inserted into outside outer cover 13.Using needle-shaped adsorption head So that the extraction scope of exfoliated cell extractor is small, can extract the cast-off cells in tiny crack, and extract be not easy it is dirty Dye.But the utility model to the structure of adsorption head 2 with no restriction, in other embodiments, other knots are can be used in adsorption head 2 Structure.In this present embodiment, the top of needle-shaped adsorption head 21 is round mouth, facilitates and extracts cell while scraping extract.But The utility model to the shape on needle-shaped 21 top of adsorption head with no restriction, in other embodiments, the top of needle-shaped adsorption head 21 It can be flat mouth, angle or other shapes.The adsorption head 2 is made of plastics, and when use can be according to different situations, by adsorption head 2 Top be cut into the shapes of needs.But the utility model to the material of adsorption head 2 with no restriction, in other embodiments, inhale Attached head 2 can be made of other materials.

Pedestal 12 be equipped with switch 6, switch 6 and micro centrifuge 11 electric connection, switch 6 be used for open and close it is miniature from Scheming 11.

Battery compartment 4 is used to power to micro centrifuge 11.In this present embodiment, battery compartment 4 includes 41 He of battery compartment ontology Battery compartment shell 42, battery compartment shell 42 can be placed on battery compartment ontology 41.But the utility model to the structure of battery compartment 4 not It is restricted, in other embodiments, battery compartment 4 can be other structures.

The working principle of exfoliated cell extractor: adsorption head 2 is directed at extract, turns on the switch 6,11 work of micro centrifuge Make, the negative pressure that micro centrifuge 11 generates is inhaled into the cast-off cells in extract in adsorption head 2, into adsorption head 2 Cast-off cells are collected on filter membrane 3.Filter membrane 3 is taken out, can be obtained cast-off cells.Gas from needle-shaped adsorption head 21 into Enter, be discharged by venthole 5, to there is no airflow reflux in exfoliated cell extractor.

The exfoliated cell extractor design of the utility model is rationally, simple and compact for structure, passes through the negative pressure absorbing of centrifuge Cast-off cells, for the cast-off cells of collection without the etch of acid or water, DNA stability is strong and is not easy to be degraded, thus conducive to DNA's Detection.

The above is only the preferred embodiment of the present invention, not thereby limits the patent protection of the utility model Range, it is all with equivalent structure transformation made by the utility model specification and accompanying drawing content, directly or indirectly it is used in it His relevant technical field similarly includes within the protection scope of the present utility model.

Claims

1. a kind of exfoliated cell extractor characterized by comprising

Centrifugal mechanism, the centrifugal mechanism include micro centrifuge, and the micro centrifuge is drawn de- for generating negative pressure Fall cell；

Adsorption head, the adsorption head are detachably inserted into one end of the centrifugal mechanism；

Filter membrane, the filter membrane are removably installed in the centrifugal mechanism, the filter membrane be located at the adsorption head with The connected one end of the centrifugal mechanism；And

Battery compartment, the battery compartment are mounted on the other end of the centrifugal mechanism, and the battery compartment is used for the Minitype centrifugal Machine power supply.

2. a kind of exfoliated cell extractor as described in claim 1, which is characterized in that the centrifugal mechanism further include:

Pedestal, the pedestal are equipped with venthole, and the micro centrifuge is installed in the pedestal, and the battery compartment is mounted on One end of the pedestal；And

Outer cover, the outer cover are mounted on the other end of the pedestal.

3. a kind of exfoliated cell extractor as claimed in claim 2, which is characterized in that the adsorption head includes needle-shaped adsorption head With tubular adsorbent head, one end of the tubular adsorbent head is connected with the needle-shaped adsorption head, the other end of the tubular adsorbent head It is detachably inserted into outside the outer cover.

4. a kind of exfoliated cell extractor as claimed in claim 3, which is characterized in that the top of the needle-shaped adsorption head is circle Mouth, flat mouth or angle.

5. a kind of exfoliated cell extractor as claimed in claim 2, which is characterized in that the pedestal is equipped with switch, described Switch is electrically connected with the micro centrifuge, and the switch is for opening and closing the micro centrifuge.

6. a kind of exfoliated cell extractor as described in claim 1, which is characterized in that the battery compartment includes battery compartment ontology With battery compartment shell, the battery compartment shell can be placed on the battery compartment ontology.