Biological material evidence extraction sleeve
By designing the combined structure of the casing shell, connecting rod and positioning pin, the breaking timing of the cotton swab head is controlled, and the problem of the existing sleeve being easily broken during the extraction process is solved, achieving convenient, safe and efficient extraction of biological evidence.
Patent Information
- Application Number
- CN202422681890.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-04
AI Technical Summary
When the existing physical evidence extraction sleeve needs to be vigorously extracted on-site biological evidence, the cotton swab head and the cotton swab rod are prone to break, resulting in contamination and inconvenient operation.
A biological evidence extraction sleeve is designed, including a sleeve shell, connecting rod, cotton swab and positioning latch. The breaking timing of the swab head is controlled by the positioning latch, and the swab head is protected by the easy-breaking ring groove and mating cavity structure to ensure controllable breaking when needed.
It realizes convenient, safe and efficient operation when extracting on-site biological evidence, avoids accidental breakage of the swab head, and ensures sample integrity and operation smoothness.
Smart Images
Figure CN223268643U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of biological sampling, in particular to a biological evidence extraction sleeve. Background Art
[0002] Existing evidence extraction cannulas are usually composed of a cotton swab and a shell. The cotton swab includes a rod body and a cotton swab head. Usually, there is an easy-to-break structure between the rod body and the cotton swab head. This design is to be able to break the cotton swab rod with less force during the post-extraction inspection stage, thereby facilitating the removal of the cotton swab head from the extraction tube for DNA extraction. Since the cotton swab head and the cotton swab rod are easily broken, this may cause breakage when it is necessary to use force to extract certain biological evidence at the scene, thereby causing contamination. Utility Model Content
[0003] The purpose of the utility model is to provide a biological evidence extraction sleeve, which can independently control the breaking time of the cotton swab head, ensuring convenient and smooth operation, and convenient, safe and efficient use.
[0004] The cam is secured to a location where the cam is secured to a position where the cam is secured to a location on the cam, and the cam is secured to a location where the cam is secured to a location on the cam.
[0005] As a preferred solution of the present invention, a positioning protrusion is provided on the second end of the rod body, a matching groove is provided on the top of the connecting rod, and a positioning groove is provided at the bottom of the matching groove for snapping into the positioning protrusion; when the positioning pin is inserted into the first pin hole and the second pin hole, the top surface of the second end of the rod body is flush with the top surface of the connecting rod, or the top surface of the second end of the rod body is lower than the top surface of the connecting rod.
[0006] As a preferred solution of the present invention, a drying partition is provided at the lower part of the sleeve shell, which divides the inner cavity of the sleeve shell into an upper placement cavity and a lower drying cavity. A desiccant is provided in the drying cavity, and a plurality of air holes are provided on the drying partition.
[0007] As a preferred solution of the present invention, a cover plate is provided on the top of the connecting rod, and a buckling groove that buckles with the top of the sleeve shell is provided on the outer edge of the cover plate.
[0008] As a preferred solution of the present invention, the sleeve shell is in a rectangular parallelepiped shape.
[0009] As a preferred solution of the present invention, the lower section of the connecting rod has an inverted cone structure.
[0010] As a preferred solution of the present invention, a label slot is provided on the outer wall of the sleeve shell.
[0011] Compared with the prior art, the biological evidence extraction cannula of the present invention has the following beneficial effects:
[0012] The utility model is used for extracting biological evidence at the scene, and the easily-breakable ring groove of the rod body is located in the matching cavity, so as to ensure that the easily-breakable position of the cotton swab is protected by the connecting rod, and the cotton swab head will not break when it is used to extract biological evidence at the scene; during the inspection stage, the positioning pin is pulled out, the cotton swab is pushed and the easily-breakable ring groove of the rod body is extended out of the connecting rod, so that the cotton swab head can be placed in the inspection tube for rapid breaking of the cotton swab head; it can be seen that the utility model can independently control the breaking time of the cotton swab head, thereby ensuring convenient and smooth operation, and convenient, safe and efficient use. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments are briefly introduced below.
[0014] Figure 1 A cross-sectional view of a biological evidence extraction cannula provided by the present utility model;
[0015] Figure 2 This is a cross-sectional view of the easily breakable ring groove of the cotton swab provided by the present invention extending out of the connecting rod;
[0016] Figure 3 A schematic structural diagram of the casing shell provided by the utility model;
[0017] In the figure, the sleeve shell 1; the drying partition 11; the drying chamber 12; the placement chamber 13; the label slot 14; the connecting rod 2; the first pin hole 21; the matching groove 22; the positioning groove 23; the cover 24; the cotton swab 3; the rod body 31; the easy-to-break ring groove 311; the second pin hole 312; the positioning protrusion 313; the cotton swab head 32; and the positioning pin 4. DETAILED DESCRIPTION
[0018] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0019] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0020] like Figures 1 to 3 As shown, a biological evidence extraction cannula of a preferred embodiment of the present invention includes a cannula shell 1, a connecting rod 2, a cotton swab 3 and a positioning pin 4. The cotton swab 3 includes a rod body 31 and a cotton swab head 32 connected to the first end of the rod body 31. A matching cavity for slidingly cooperating with the rod body 31 is provided in the connecting rod 2. An easily breakable annular groove 311 is provided on the first end of the rod body 31. A first pin hole is provided on the side wall of the connecting rod 2. A second pin hole 312 is provided on the rod body 31. The positioning pin 4 is inserted into the first pin hole. When the locating pin 4 is in the hole and the second pin hole 312, the easily broken annular groove 311 is located in the matching cavity; when the locating pin 4 is out of the second pin hole 312, the second end of the rod body 31 is engaged with the connecting rod 2, and the easily broken annular groove 311 extends out of the matching cavity; the upper end of the sleeve shell 1 is provided with an opening, the lower end of the sleeve shell 1 is closed, the connecting rod 2 is placed on the inner cavity of the sleeve shell 1, the upper end of the connecting rod 2 is connected to the upper end of the sleeve shell 1, and the upper end of the connecting rod 2 covers the opening.
[0021] Exemplarily, a positioning protrusion 313 is provided on the second end of the rod body 31, a mating groove 22 is provided on the top of the connecting rod 2, and a positioning groove 23 is provided at the bottom of the mating groove 22 for snapping into the positioning protrusion 313; when the positioning pin 4 is inserted into the first pin hole and the second pin hole 312, the top surface of the second end of the rod body 31 is flush with the top surface of the connecting rod 2, or the top surface of the second end of the rod body 31 is lower than the top surface of the connecting rod 2, ensuring that the top of the rod body 31 is always located inside the connecting rod 2, avoiding the top of the rod body 31 extending out of the connecting rod 2 and causing the rod body 31 to break, thereby facilitating the transportation of the biological evidence extraction sleeve.
[0022] Exemplarily, a drying partition 11 is provided at the lower portion of the sleeve shell 1, and the drying partition 11 divides the inner cavity of the sleeve shell 1 into an upper placement cavity 13 and a lower drying cavity 12. A desiccant is provided in the drying cavity 12, and a plurality of air holes are provided on the drying partition 11 to ensure that the sample on the cotton swab head 32 is dry.
[0023] Exemplarily, a cover plate 24 is provided on the top of the connecting rod 2, and a snap-fitting groove is provided on the outer edge of the cover plate 24 for snapping with the top of the sleeve shell 1, so as to facilitate the connection between the top of the connecting rod 2 and the sleeve shell 1 and fix the position of the connecting rod 2.
[0024] Exemplarily, the sleeve shell 1 is in a rectangular parallelepiped shape, which prevents the biological evidence extraction sleeve from rolling randomly and facilitates the transportation and storage of multiple biological evidence extraction sleeves.
[0025] Illustratively, the lower section of the connecting rod 2 is in an inverted cone-shaped structure, which prevents the lower end of the connecting rod 2 from accidentally touching the biological evidence when the cotton swab head 32 extracts the biological evidence, thereby preventing the connecting rod 2 from being contaminated.
[0026] Exemplarily, a label slot 14 is provided on the outer wall of the sleeve shell 1, so that the label paper is combined with the sleeve shell 1 through the label slot 14, avoiding the situation where the label paper is incorrectly affixed when multiple biological evidence extraction sleeves are used simultaneously to extract on-site evidence, and facilitating the identification of each biological evidence extraction sleeve.
[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.
Claims
1. A biological evidence extraction cannula, characterized in that: The cam is secured to a location where the cam is secured to a position where the cam is secured to a location on the cam face of the base and a second location on the cam face of the base, the cam being secured to a location where the cam is secured to a location on the cam face.
2. The biological evidence extraction cannula according to claim 1, wherein: A positioning protrusion is provided on the second end of the rod body, a matching groove is provided on the top of the connecting rod, and a positioning groove is provided at the bottom of the matching groove for buckling with the positioning protrusion; when the positioning pin is inserted into the first pin hole and the second pin hole, the top surface of the second end of the rod body is flush with the top surface of the connecting rod, or the top surface of the second end of the rod body is lower than the top surface of the connecting rod.
3. The biological evidence extraction cannula according to claim 1, wherein: A drying partition is provided at the lower part of the sleeve shell, which divides the inner cavity of the sleeve shell into an upper placement cavity and a lower drying cavity. A desiccant is provided in the drying cavity, and a plurality of air holes are provided on the drying partition.
4. The biological evidence extraction cannula according to claim 1, wherein: A cover plate is provided on the top of the connecting rod, and a buckling groove buckled with the top of the sleeve shell is provided on the outer edge of the cover plate.
5. The biological evidence extraction cannula according to claim 1, wherein: The sleeve shell is in a rectangular parallelepiped shape.
6. The biological evidence extraction cannula according to claim 1, wherein: The lower section of the connecting rod is in an inverted cone structure.
7. The biological evidence extraction cannula according to claim 1, wherein: The outer wall of the sleeve shell is provided with a label slot.