Magnetic test tube rack

Abstract

The utility model relates to a magnetic test tube rack which comprises a test tube bracket and a magnet working strip, the test tube bracket comprises a bottom plate, a top plate and side plates positioned at the left and right ends of the bottom plate and the top plate; a plurality of test tube holes are formed in the top plate in the left-right direction; a space for inserting and pulling the magnet working strip from the rear side of the test tube bracket is formed on the rear side of the test tube hole in the test tube bracket; the magnet working strip comprises an insertion block and a magnet fixing strip; the magnet fixing strip is arranged at a position below or above the vertical middle of the insertion block; magnets in one-to-one correspondence with the test tube holes are embedded in the magnet fixing strips. According to the magnetic test tube rack disclosed by the utility model, the magnet working strip is inserted into the test tube bracket, so that quick disassembly and assembly can be realized, and magnetic or non-magnetic experiment requirements are met; due to the non-center arrangement of the magnet working strips, switching of two-gear magnetic force ranges can be achieved through forward installation or reverse installation, and the attraction requirements of different liquid levels are met.

Description

Technical Field

[0001] This utility model relates to the field of biomagnetic bead purification technology, and in particular to a magnetic test tube rack. Background Technology

[0002] With the development of bioengineering technology, efficient and rapid magnetic bead-based nucleic acid extraction and purification technology has become increasingly important in biological and genetic research. Magnetic test tube racks are experimental instruments specifically designed for magnetic bead-based nucleic acid extraction and purification. They primarily utilize an external magnetic field to concentrate and adsorb magnetic beads labeled with specific substances onto a particular location, separating the magnetic beads from non-magnetic substances, thereby achieving the separation and purification of the target substance.

[0003] Currently, most conventional magnetic test tube racks have a relatively simple structure, with most being fixed in place by magnets, making them inconvenient to disassemble. While they may meet users' experimental requirements, samples often need to be removed from the rack when magnetic bead adsorption is not required. When processing multiple samples, this repeated operation increases experimental time and necessitates the use of other sample racks or other equipment to hold samples removed from the rack, making the work surface crowded and hindering operational convenience. Furthermore, the magnetic beads on many racks are positioned too low, requiring extended adsorption time when processing samples with large volumes of liquid to ensure experimental results. Additionally, the exposed magnets on most racks are susceptible to corrosion from spilled reagents or impacts, leading to oxidation and rust, ultimately damaging the magnets and reducing their lifespan. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a magnetic test tube rack. The magnetic working strip is inserted into the test tube holder, which can be quickly assembled and disassembled to meet the experimental needs of both magnetic and non-magnetic conditions. The non-central setting of the magnetic working strip can be switched between two magnetic force ranges by being installed upright or upside down to meet the adsorption needs of different liquid surfaces.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a magnetic test tube rack, including a test tube support and a magnetic working strip; the test tube support includes a base plate, a top plate, and side plates located at the left and right ends of the base plate and the top plate; the top plate is provided with a plurality of test tube holes along the left and right direction; a space is formed in the test tube support behind the test tube holes for the magnetic working strip to be inserted and removed from the rear side of the test tube support; the magnetic working strip includes an insertion block and a magnetic fixing strip; the magnetic fixing strip is located at a position slightly below or slightly above the vertical center of the insertion block; magnets corresponding to the test tube holes are embedded in the magnetic fixing strip.

[0006] Furthermore, the front side of the insert block is provided with a T-shaped groove in the left-right direction; the magnet fixing strip is also T-shaped, and the magnet fixing strip is used to be inserted into the groove from the left or right side, and then assembled with the insert block; after the magnet fixing strip and the insert block are assembled, the gap between them is sealed and filled with epoxy resin.

[0007] Furthermore, the top and bottom sides of the insert block are respectively provided with support feet in the rear region.

[0008] Furthermore, the rear end face of the magnet fixing strip is provided with a number of magnet mounting blind holes corresponding to the number of magnets; the magnets are installed in the magnet mounting blind holes.

[0009] Furthermore, the bottom plate and top plate of the test tube holder are parallel, and the width of the top plate in the front-to-back direction is smaller than the width of the bottom plate in the front-to-back direction, so that the cross-section of the test tube holder is a right trapezoid that is narrow at the top, wide at the bottom, and sloping forward.

[0010] Furthermore, the side panel is a right-angled trapezoid with a hollow design.

[0011] Furthermore, a number of support columns are provided between the bottom plate and the top plate; the rear end of the support columns does not exceed the rear edge of the test tube hole.

[0012] Furthermore, the support column is a right-angled trapezoid with a hollow design.

[0013] Furthermore, the base plate is provided with test tube fixing holes that correspond one-to-one with the test tube holes.

[0014] Furthermore, the test tube hole has an opening on its front side; the test tube fixing hole is keyhole shaped.

[0015] The beneficial effects of this utility model are as follows: The magnetic test tube rack of this utility model allows for quick assembly and disassembly by inserting the magnetic working strip into the test tube holder. In experiments where no magnetic field is required, the centrifuge tubes do not need to be removed; in experiments requiring a magnetic field, the magnetic working strip can be inserted, satisfying both magnetic and non-magnetic experimental needs. The non-central design of the magnetic working strip allows for switching between two magnetic force ranges by inserting it upright or upside down, thus meeting the magnetic adsorption requirements for lower or higher liquid levels. The magnets are built into the magnetic fixing strip, preventing contact with the external environment, reducing rust resistance, and extending service life. Attached Figure Description

[0016] Figure 1 A three-dimensional schematic diagram of a magnetic test tube rack as an example;

[0017] Figure 2 An exploded schematic diagram of a magnetic test tube rack as an example;

[0018] Figure 3 An exploded view of the magnetic working strip of a magnetic test tube rack according to an embodiment;

[0019] Figure 4 This is a front view schematic diagram of a magnetic test tube rack according to an embodiment;

[0020] Figure 5 A front view schematic diagram of the inverted magnetic working strip of a magnetic test tube rack according to an embodiment;

[0021] Figure 6 for Figure 4 A cross-sectional view of AA;

[0022] Figure 7 for Figure 5 A cross-sectional view of BB;

[0023] Among them, 1-test tube support, 2-magnetic working strip, 11-base plate, 12-top plate, 13-side plate, 14-support column, 111-test tube fixing hole, 121-test tube hole, 21-insertion block, 22-magnet fixing strip, 211-slide groove, 212-support foot, 221-magnet mounting blind hole, 222-magnet. Detailed Implementation

[0024] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.

[0025] Example

[0026] Please refer to Figures 1 to 7 As shown, this embodiment provides a magnetic test tube rack, including a test tube support 1 and a magnetic working strip 2; the test tube support 1 includes a base plate 11, a top plate 12, and side plates 13 located at the left and right ends of the base plate 11 and the top plate 12; the top plate 12 is provided with a plurality of test tube holes 121 along the left and right direction; a space is formed in the test tube support 1 behind the test tube holes 121 for the magnetic working strip 2 to be inserted and removed from the rear side of the test tube support 1; the magnetic working strip 2 includes an insertion block 21 and a magnetic fixing strip 22; the magnetic fixing strip 22 is located at a position slightly below or slightly above the vertical center of the insertion block 21; magnets 222 corresponding to the test tube holes 121 are embedded in the magnetic fixing strip 22.

[0027] In this embodiment, magnet 222 is a high-performance neodymium magnet, and the greater its thickness, the stronger its magnetic force. In this embodiment, the magnet working strip is inserted from the rear, so the thickness of magnet 222 is not limited. The thickness of the insert block and the magnet fixing strip in the front and rear directions can be increased or decreased to install neodymium magnets of different thicknesses to meet the requirements of different magnetic forces.

[0028] Refer to Figure 3 As shown, the front side of the insert 21 has a T-shaped groove 211 running left and right; the magnet fixing strip 22 is also T-shaped and is used to be inserted into the groove 211 from the left or right side, and then assembled with the insert 21; after the magnet fixing strip 22 and the insert 21 are assembled, the gap between them is sealed and filled with epoxy resin. In this embodiment, during assembly, epoxy resin is brushed onto the magnet fixing strip with the magnet installed, and then it is inserted into the insert. In this way, after the epoxy resin cures, it will form a complete seal for the magnet, and the gap between the magnet fixing strip and the insert will be filled with epoxy resin. This can prevent liquids such as reagents from entering the magnet through the gap between the magnet fixing strip and the insert during the experiment and causing corrosion damage to the magnet.

[0029] Refer to Figure 2 As shown, the top and bottom sides of the insertion block 21 are respectively provided with support feet 212 in the rear region. The support feet not only provide support to ensure the stability of the insertion block 21 when inserted into the test tube holder 1, but also serve as a limit to restrict the depth of insertion of the insertion block 21 into the test tube holder 1, thereby allowing the magnet fixing strip 22 to be inserted into the appropriate front and rear positions.

[0030] Refer to Figure 3 As shown, the rear end face of the magnet fixing strip 22 has a number of blind holes 221 corresponding to the number of magnets; the magnets 222 are installed in the blind holes 221. In this embodiment, the design of the blind holes 221 at the rear end of the magnet fixing strip 22 allows the magnets to be embedded in the magnet fixing strip. In addition to fixing the magnets, the magnet fixing strip can also effectively protect the magnets, preventing them from contacting the external environment, making them less prone to rusting, and improving their service life. The thickness between the front end face of the blind hole 221 and the front end face of the magnet fixing strip 22 does not exceed 0.5 mm, ensuring the distance between the magnet and the centrifuge tube and avoiding weakening the effective magnetic field and reducing the magnetic attraction effect when the thickness is too large.

[0031] Refer to Figure 2 , Figure 6 As shown, the base plate 11 and top plate 12 of the test tube holder 1 are parallel, and the width of the top plate 12 in the front-to-back direction is smaller than the width of the base plate 11 in the front-to-back direction, so that the cross-section of the test tube holder 1 is a right trapezoid that is narrower at the top, wider at the bottom, and sloping forward. The structure of the right trapezoid that is narrower at the top, wider at the bottom, and sloping forward allows the magnetic test tube holder to maintain good overall stability.

[0032] Refer to Figure 2As shown, the side plate 13 is a right-angled trapezoid with a hollow design. In this embodiment, the hollow design of the side plate 13 includes rectangular hollows and right-angled trapezoidal hollows. The test tube holder is made of high-strength plastic, such as ABS, which makes the test tube holder lightweight yet sturdy; combined with the hollow design, it can further reduce the overall weight of the magnetic test tube holder and make it easy to operate.

[0033] Refer to Figure 2 , Figure 6 As shown, a plurality of support columns 14 are also provided between the base plate 11 and the top plate 12; the rear end of the support column 14 does not exceed the rear edge of the test tube hole 121. The support columns can effectively prevent the middle deformation of the magnetic test tube rack, making the overall structure of the magnetic test tube rack more stable.

[0034] Refer to Figure 2 , Figure 6 As shown, the support column 14 is a right-angled trapezoid with a hollow design. In this embodiment, the hollow design of the support column 14 includes a right-angled trapezoidal hollow. The hollow design can effectively reduce the overall weight of the magnetic test tube rack and facilitate operation.

[0035] Refer to Figure 2 As shown, the base plate 11 is provided with test tube fixing holes 111 corresponding one-to-one with the test tube holes 121. In this embodiment, the test tube holes are slightly smaller than the diameter of the centrifuge tubes. Utilizing the elasticity of the centrifuge tubes themselves, they can be tightly installed in the test tube holes and can also be easily pulled out. In this way, the test tube holder can be placed on a shaker for shaking and mixing. Combined with the above-mentioned design to stabilize the overall structure, it is more conducive to the transmission of the shaking force to the liquid in the centrifuge tube, making it easier to form vortices and improve the mixing efficiency.

[0036] Refer to Figure 2 As shown, the test tube hole 121 has an opening on the front side; the test tube fixing hole 111 is keyhole shaped.

[0037] In this embodiment, a magnetic test tube rack allows the magnetic working strip to be removed during experiments where no magnetic field is required, and only the test tube holder is used. When a magnetic field is needed, the magnetic working strip can be inserted into the test tube holder from the rear.

[0038] This embodiment of a magnetic test tube rack has two adjustable settings; such as Figure 4 and Figure 6 As shown, when the liquid level in the centrifuge tube is low, the magnetic strip is inserted upright into the test tube holder; at this time, the magnetic fixing strip of the magnetic strip is in a vertical position slightly below the middle, providing magnetic attraction for the centrifuge tube at a lower position; as shown... Figure 5 and Figure 7As shown, when the liquid level in the centrifuge tube is high, the magnetic working strip is inserted upside down into the test tube holder; at this time, the magnetic fixing strip of the magnetic working strip is in a vertical position slightly above the middle, providing a higher magnetic attraction for the centrifuge tube.

[0039] The above embodiments should not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.

Claims

1. A magnetic test tube rack characterized by: The application relates to a test tube rack (1) and a magnet working strip (2); the test tube rack (1) comprises a bottom plate (11), a top plate (12), and side plates (13) located at the left and right ends of the bottom plate (11) and the top plate (12); a plurality of test tube holes (121) are arranged on the top plate (12) in the left-right direction; a space for inserting and pulling out the magnet working strip (2) from the rear side of the test tube rack (1) is formed at the rear side of the test tube holes (121) in the test tube rack (1); the magnet working strip (2) comprises an insertion block (21) and a magnet fixing strip (22); the magnet fixing strip (22) is arranged at a position vertically in the middle and slightly below or slightly above the insertion block (21); and the magnet fixing strip (22) is internally embedded with magnets (222) corresponding to the test tube holes (121) one by one.

2. The magnetic test tube rack of claim 1, wherein: A T-shaped sliding groove (211) is formed on the front side of the insertion block (21) in the left-right direction; the magnet fixing strip (22) is also T-shaped, the magnet fixing strip is used for being inserted into the sliding groove (211) from the left side or the right side, and then being assembled with the insertion block (21); after the magnet fixing strip (22) is assembled with the insertion block (21), the gap between the two is sealed and filled with epoxy resin.

3. The magnetic test tube rack of claim 1, wherein: Supporting feet (212) are arranged on the top side and the bottom side of the insertion block (21) in the rear area respectively.

4. The magnetic test tube rack of claim 1, wherein: A plurality of magnet mounting blind holes (221) corresponding to the magnets are formed on the rear end face of the magnet fixing strip (22); the magnets (222) are mounted in the magnet mounting blind holes (221).

5. The magnetic test tube rack of claim 1, wherein: The bottom plate (11) of the test tube rack (1) is parallel to the top plate (12), the width of the front-rear direction of the top plate (12) is smaller than the width of the front-rear direction of the bottom plate (11), so that the cross section of the test tube rack (1) is an acute-angled trapezoid which is narrow at the top and wide at the bottom and is inclined forward.

6. A magnetic test tube rack according to claim 5, characterized in that: The side plates (13) are acute-angled trapezoids and are designed in a hollow manner.

7. The magnetic test tube rack of claim 5, wherein: A plurality of supporting columns (14) are arranged between the bottom plate (11) and the top plate (12); the rear end of the supporting column (14) does not exceed the rear edge of the test tube hole (121).

8. The magnetic test tube rack of claim 7, wherein: The supporting column (14) is an acute-angled trapezoid and is designed in a hollow manner.

9. A magnetic test tube rack according to any one of claims 1-8, characterized in that: The bottom plate (11) is provided with test tube fixing holes (111) corresponding to the test tube holes (121) one by one.

10. The magnetic test tube rack of claim 9, wherein: The front side of the test tube hole (121) has an opening; and the test tube fixing hole (111) is in the shape of a keyhole.

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