CN-224227061-U - Novel cell DNA that drops gathers device

Abstract

The utility model relates to the technical field of criminal investigation evidence obtaining equipment, in particular to a novel exfoliated cell DNA collecting device which comprises a collecting rod and a collecting head connected with the collecting rod, wherein the collecting rod comprises a rod body, a connecting groove and a breaking groove, the connecting groove and the breaking groove are formed in the rod body, the depth of the breaking groove is larger than that of the connecting groove, one end of the rod body is inserted into the collecting head and fixedly connected with the collecting head, the collecting head comprises a collecting part, a connecting part and a protruding part, the collecting part is in a flat cuboid shape, and the connecting part is arranged in the middle of one end side surface of the collecting part.

Inventors

• Dong Yanfa
• LIU HAIDONG
• LI TIANTIAN
• LIU YAWEI
• YANG FAN
• LI HAIJIE
• LIU KAI

Assignees

• 嘉祥县公安局

Dates

Publication Date

20260512

Application Date

20250523

Claims (3)

1. 1. The novel exfoliated cell DNA collecting device is characterized by comprising a collecting rod (1) and a collecting head (2) connected with the collecting rod; the collecting rod (1) comprises a rod body (101), a connecting groove (102) and a breaking groove (103), wherein the connecting groove (102) and the breaking groove (103) are formed in the rod body (101), the depth of the breaking groove (103) is larger than that of the connecting groove (102), and one end of the rod body (1) is inserted into the collecting head (2) and fixedly connected into the collecting head (2); The utility model provides a collection head (2) is including collection portion (201), connecting portion (202) and bulge (203), collection portion (201) is flat cuboid form, the middle part of collection portion (201) one end side is provided with connecting portion (202), connecting portion (202) cup joint in the outside of collection stick (1) one end, be provided with bulge (203) on the medial surface that collection portion (201) one end was kept away from to connecting portion (202), bulge (203) fixed connection is in spread groove (102), the material of collection head (2) is nylon fiber.
2. 2. The novel exfoliated cell DNA collecting device according to claim 1, wherein the rod body (101) is made of polypropylene.
3. 3. The novel exfoliated cell DNA collecting device according to claim 1, wherein the side surface of the collecting rod (1) far away from one end of the collecting head (2) is provided with outwards protruding anti-skid patterns (3).

Description

Novel cell DNA that drops gathers device Technical Field The utility model relates to the technical field of criminal investigation evidence obtaining equipment, in particular to a novel exfoliated cell DNA collecting device. Background The cotton swab heads adopted for collecting the DNA of the exfoliated cells in the current case on-site investigation are mostly cylindrical or conical, and the collecting method adopts a two-step method for collecting, namely, the cotton swab heads are sprayed with liquid in the first step, then the surfaces of the exfoliated cell carriers are wiped, and the surfaces of the carriers are wiped by using dry cotton swabs in the second step. The two-step method can fully extract the exfoliated cells on the carrier and reduce the loss. However, the disadvantage is that the exfoliated cells on the carrier are distributed on a plurality of cotton swabs, so that the amount of exfoliated cells on a single cotton swab is reduced, the enrichment of exfoliated cells is reduced, the next step of DNA extraction and PCR amplification are affected, and the detection rate is reduced. In addition, the traditional head of the cotton swab extracted by the exfoliated cells mostly uses natural cotton fibers, natural components such as polysaccharide, phenolic compounds, lignin and the like remain in the natural cotton fibers, and the substances can interfere extraction and amplification of DNA/RNA, so that the sensitivity and accuracy of PCR are reduced. In addition, cotton fibers may also adsorb nucleic acids, resulting in sample loss. Therefore, the traditional extraction cotton swabs and extraction methods cannot meet the requirements of modern field investigation and DNA laboratory inspection. Disclosure of utility model In view of the problems existing in the prior art, the utility model discloses a novel exfoliated cell DNA collecting device, which adopts the technical scheme that the novel exfoliated cell DNA collecting device comprises a collecting rod and a collecting head connected with the collecting rod; The collecting rod comprises a rod body, a connecting groove and a breaking groove, wherein the connecting groove and the breaking groove are formed in the rod body, the depth of the breaking groove is larger than that of the connecting groove, and one end of the rod body is inserted into the collecting head and fixedly connected with the collecting head; The collecting head comprises a collecting part, a connecting part and a protruding part, wherein the collecting part is in a flat cuboid shape, the connecting part is arranged in the middle of one end side surface of the collecting part, the connecting part is sleeved outside one end of a collecting rod, the protruding part is arranged on the inner side surface of one end of the collecting part, which is far away from the connecting part, of the connecting part, the protruding part is fixedly connected in a connecting groove, and the collecting head is made of nylon fiber. As a preferable technical scheme of the utility model, the rod body is made of polypropylene. As a preferable technical scheme of the utility model, the side surface of the collecting rod far away from one end of the collecting head is provided with anti-skid patterns protruding outwards. The utility model has the beneficial effects that the collecting head is changed into a flat cuboid, one surface of the cuboid of the collecting part can be sprayed wet to wipe the surface of the carrier of the exfoliated cells when in use, and then the other surface of the dried body is used for wiping the carrier, so that the defect that the traditional two-step method is used for distributing trace exfoliated cells on a plurality of cotton swabs to cause the dispersion of the exfoliated cells is overcome, and the detection rate is improved. The collecting head is made of nylon fiber, the nylon fiber is a synthetic material, the price is low, the collecting head does not contain natural inhibitors, the collecting head has high adsorptivity to the exfoliated cells, the capturing rate of the exfoliated cells is improved, and the collecting head has high release efficiency during pyrolysis. Drawings FIG. 1 is a schematic diagram of the overall structure of the present utility model; FIG. 2 is a schematic view of the structure of the acquisition rod and the acquisition head of the present utility model; FIG. 3 is a schematic cross-sectional view of the present utility model. In the figure, 1 acquisition rod, 101 rod body, 102 connecting groove, 103 breaking groove, 2 acquisition head, 201 acquisition part, 202 connecting part, 203 protruding part and 3 anti-skid pattern. Detailed Description Example 1 As shown in fig. 1 to 3, the utility model discloses a novel exfoliated cell DNA collecting device, which adopts the technical scheme that the novel exfoliated cell DNA collecting device comprises a collecting rod 1 and a collecting head 2 connected with the collecting rod; The coll