Magnetic bar quick-release assembly and nucleic acid extractor

Abstract

The utility model relates to the technical field of nucleic acid extraction, in particular to a magnetic rod quick-release assembly and a nucleic acid extractor, the magnetic rod quick-release assembly comprises a mounting rack, a magnetic rod group and a locking structure, the mounting rack is provided with a plurality of mounting grooves arranged at intervals, and the mounting rack is provided with a plurality of sockets communicated with the mounting grooves in a one-to-one correspondence manner; the multiple magnetic rod sets are installed in the corresponding installation grooves, the magnetic rod sets abut against the groove side walls of the installation grooves in the upward direction of the groove openings, the multiple locking structures correspond to the installation grooves in a one-to-one mode, and locking pieces of the locking structures are installed on the installation frame in the upward direction of the groove openings of the installation grooves and can move in a reciprocating mode. The locking piece is provided with a first position abutting against the magnetic bar set in the first direction at the inserting opening and further provided with a second position avoiding the magnetic bar set, the magnetic bar set can be fixedly mounted and dismounted on the mounting frame by changing the specific position of the locking piece, the magnetic bar set can be mounted or dismounted according to the sample capacity, use of redundant magnetic bar sleeves is avoided, and the cost is reduced. And the use cost of the nucleic acid extraction instrument can be reduced.

Description

Technical Field

[0001] This application relates to the field of nucleic acid extraction technology, specifically to a magnetic rod quick-release assembly and a nucleic acid extractor. Background Technology

[0002] Currently, most nucleic acid extraction methods employ magnetic adsorption. Cells are lysed by the oscillation of a magnetic rod sleeve in the nucleic acid extractor. The released nucleic acid is adsorbed by nano-magnetic beads. Then, the magnetic beads are magnetized, adsorbed, transferred, washed, and eluted by the cooperation of the magnetic rod and the magnetic rod sleeve, ultimately obtaining purified nucleic acid.

[0003] In nucleic acid extractors, the magnetic rods are glued or screwed onto the magnetic rod holder. In most cases, the sample volume for nucleic acid extraction is small, and the number of magnetic rods is not required. If the extra magnetic rods cannot be removed in time, more magnetic rod sleeves need to be inserted for protection during the experiment. The extra inserted magnetic rod sleeves will be wasted, which will lead to a higher operating cost of the nucleic acid extractor. Utility Model Content

[0004] This application provides a magnetic rod quick-release assembly and a nucleic acid extractor to solve the technical problem of high operating costs of nucleic acid extractors.

[0005] According to a first aspect, one embodiment provides a magnetic rod quick-release assembly, comprising:

[0006] The mounting bracket is used to install on the extraction module of a nucleic acid extractor. It has multiple spaced mounting slots that extend in a first direction. The mounting bracket has multiple sockets at its end in the first direction that correspond to and communicate with each of the mounting slots.

[0007] Multiple magnetic rod assemblies are provided, and each corresponds to a mounting slot. The magnetic rod assembly is installed in the corresponding mounting slot, and the magnetic rod assembly abuts against the side wall of the corresponding mounting slot facing upwards.

[0008] The locking structure is provided in multiple ways, and each locks one-to-one with the mounting slot. The locking structure includes a locking member, which is reciprocally mounted on the mounting bracket with the slot opening facing upward. The locking member has a first position at the insertion point that abuts against the magnetic rod assembly in the first direction, and a second position that avoids the magnetic rod assembly.

[0009] In an alternative embodiment, the locking structure further includes an elastic element for applying an elastic force to the locking member to hold the locking member in the first position.

[0010] In one optional embodiment, the locking structure further includes a fixing seat mounted on the mounting bracket, and the locking member passing through the fixing seat. The locking member has an operating end and a locking end located on both sides of the fixing seat in the groove orientation of the mounting groove. The locking end is used to abut against the magnetic rod assembly, and both the operating end and the locking end can abut against the fixing seat in the groove orientation of the mounting groove.

[0011] In one optional embodiment, the fixing seat includes a seat body and a limiting plate. The seat body has a through hole through which the locking member passes. The limiting plate is connected to one end of the seat body in the extending direction of the through hole. The limiting plate and the operating end abut against each other in the upward orientation of the mounting groove.

[0012] In one alternative embodiment, the fixing seat has a groove, and when the locking member is in the second position, at least a portion of the locking end is located within the groove.

[0013] In one alternative embodiment, the fixing seat has a groove, the elastic element is located in the groove, and the elastic element is elastically press-fitted between the fixing seat and the locking end.

[0014] In one alternative embodiment, the locking member has a locking surface that abuts against the magnetic rod assembly in the first direction, and the locking surface is disposed gradually away from the magnetic rod assembly in the first direction from the bottom wall of the mounting groove to the groove opening.

[0015] In one alternative embodiment, the locking surface is an inclined surface, and the magnetic rod assembly has a locking mating surface that conforms to the locking surface.

[0016] In one optional embodiment, the sidewall of the mounting groove has a limiting protrusion extending toward the inside of the mounting groove at the groove opening. The magnetic rod assembly includes a mounting plate and a plurality of magnetic rods connected to the mounting plate. The plurality of magnetic rods are spaced apart in the first direction. At least a portion of the mounting plate is located between the limiting protrusion and the bottom wall of the mounting groove in the groove opening direction. The mounting plate and the limiting protrusion abut against each other in the groove opening direction of the mounting groove.

[0017] According to the second aspect, one embodiment provides a nucleic acid extractor, including an extraction module and the magnetic rod quick-release assembly described in any of the above claims.

[0018] According to the above embodiments of the magnetic rod quick-release assembly and nucleic acid extractor, the magnetic rod quick-release assembly includes a mounting frame, magnetic rod assemblies, and locking structures. The mounting frame is used to install on the extraction module of the nucleic acid extractor. The mounting frame has multiple spaced mounting slots extending in a first direction. The end of the mounting frame in the first direction has multiple insertion ports corresponding to and communicating with each mounting slot. Multiple magnetic rod assemblies are provided, each corresponding to a mounting slot. The magnetic rod assemblies are installed in the corresponding mounting slots, and the magnetic rod assemblies abut against the sidewalls of the corresponding mounting slots in the upward orientation of the slot opening. Multiple locking structures are provided and are connected to the mounting frame. The mounting slots are matched one-to-one, and the locking structure includes a locking element. The locking element is reciprocally mounted on the mounting frame with the slot opening facing upwards. The locking element has a first position that abuts against the magnetic rod assembly in a first direction at the insertion point, and a second position that avoids the magnetic rod assembly. By operating the specific position of the locking element in the locking structure, the magnetic rod assembly can be fixedly installed on the mounting frame and disassembled. The magnetic rod assembly can be installed or disassembled according to the sample capacity to make the number of magnetic rod assemblies match the sample capacity, which can avoid the use of redundant magnetic rod sleeves and help reduce the operating cost of the nucleic acid extractor. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a magnetic rod quick-release assembly according to one embodiment;

[0020] Figure 2 This is a schematic diagram of the mounting bracket in one embodiment of the magnetic rod quick-release assembly;

[0021] Figure 3 This is a schematic diagram of the structure of the magnetic rod assembly in one embodiment of the magnetic rod quick-release assembly;

[0022] Figure 4 This is a schematic diagram of the locking structure in a magnetic rod quick-release assembly according to one embodiment;

[0023] Figure 5 This is a schematic diagram of the internal structure of a locking assembly according to one embodiment.

[0024] In the diagram: 1. Mounting bracket; 11. Mounting groove; 12. Limiting protrusion; 13. Socket; 2. Magnetic rod assembly; 21. Mounting plate; 22. Locking mating surface; 23. Magnetic rod; 3. Locking structure; 31. Fixing base; 312. Base body; 313. Through hole; 314. Limiting plate; 315. Guide hole; 316. Groove; 32. Locking element; 321. Operating end; 322. Guide section; 323. Locking end; 324. Locking surface; 325. First part; 326. Second part; 33. Elastic element.

[0025] Explanation of reference numerals in parentheses in the accompanying drawings: The feature referred to by the reference numerals in parentheses in the accompanying drawings is the feature represented by both the number inside the parentheses and the number outside the parentheses. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0027] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0028] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0029] This application discloses a magnetic rod quick-release assembly, which is applied in a nucleic acid extractor. By setting a locking structure 3 on the mounting frame 1 of the magnetic rod quick-release assembly, the installation and removal of the magnetic rod assembly 2 on the mounting frame 1 can be realized by changing the position of the locking member 32 in the locking structure 3. The magnetic rod assembly 2 can be installed or removed according to the sample capacity so that the number of magnetic rod assemblies 2 is adapted to the sample capacity. This avoids the use of extra magnetic rod sleeves and helps to reduce the operating cost of the nucleic acid extractor.

[0030] Please refer to the magnetic rod quick-release assembly of this application embodiment. Figures 1 to 5The assembly includes a mounting frame 1, a magnetic rod assembly 2, and a locking structure 3. The mounting frame 1 is used to install on the Z-axis of the extraction module (not shown in the figure) of the nucleic acid extractor. The mounting frame 1 has multiple spaced mounting slots 11, which are straight slots extending in a first direction. The multiple mounting slots 11 can be spaced in a second direction, which is perpendicular to the first direction. The number of mounting slots 11 can be two, three, or more. The slot openings of the mounting slots 11 can be arranged perpendicular to the first and second directions, respectively. The end of the mounting frame 1 in the first direction has multiple insertion ports 13 that correspond one-to-one with each of the mounting slots 11.

[0031] Multiple magnetic rod assemblies 2 are provided, and the number of magnetic rod assemblies 2 is equal to the number of mounting slots 11 and corresponds one-to-one. The magnetic rod assemblies 2 are installed in their respective mounting slots 11. Please refer to... Figure 3 The magnetic rod assembly 2 includes a mounting plate 21 and multiple magnetic rods 23 connected to the mounting plate 21. The number of magnetic rods 23 can be one, two, or more. For example, depending on the common specifications of deep hole plates, the number of magnetic rods 23 in the magnetic rod assembly 2 can be eight or twelve. The mounting plate 21 is a straight plate, and the multiple magnetic rods 23 can be arranged at intervals in the extension direction of the mounting plate 21. The mounting plate 21 can be inserted into the corresponding mounting slot 11 through the insertion port 13. The mounting plate 21 can abut against the side wall of the mounting slot 11 in the slot opening direction, restricting the magnetic rod assembly 2 from separating from the mounting bracket 1 in the slot opening direction of the mounting slot 11.

[0032] In some embodiments, please refer to Figure 1 and Figure 2 The mounting groove 11 has a limiting protrusion 12 extending into the mounting groove 11 at the groove opening of the mounting groove 11. The two groove sidewalls of the mounting groove 11 are provided with limiting protrusions 12, and the groove opening of the mounting groove 11 is formed between the two limiting protrusions 12. Thus, the groove opening width of the mounting groove 11 is smaller than the groove bottom wall width of the mounting groove 11. The cross-sectional shape of the mounting groove 11 in the vertical first direction is T-shaped. Part of the mounting plate 21 is located in the mounting groove 11. The cross-sectional shape of the mounting plate 21 in the vertical first direction is adapted to the cross-sectional shape of the mounting groove 11. A part of the mounting plate 21 can be located between the limiting protrusion 12 and the groove bottom wall of the mounting groove 11 in the groove opening direction. The mounting plate 21 and the limiting protrusion 12 abut against each other in the groove opening direction of the mounting groove 11.

[0033] In some embodiments, the cross-sectional shape of the mounting groove 11 in the vertical first direction can also be set to be trapezoidal, so that the mounting plate 21 is located in the mounting groove 11, and the cross-sectional shape of the mounting plate 21 in the vertical first direction is adapted to the cross-sectional shape of the mounting groove 11. The mounting plate 21 can abut against the groove sidewall of the mounting groove 11 in the groove opening direction.

[0034] In the magnetic rod quick-release assembly of this application embodiment, please refer to... Figure 1 , Figure 4 and Figure 5 The magnetic rod quick-release assembly also includes a locking structure 3. Multiple locking structures 3 are provided, the number of which is equal to the number of mounting slots 11, and each locking structure 3 corresponds one-to-one with a mounting slot 11. Each locking structure 3 includes a locking member 32, which is reciprocally mounted on the mounting bracket 1 in the slot opening direction of the mounting slot 11. During the movement of the locking member 32 relative to the mounting bracket 1, the locking member 32 has a first position and a second position. When the locking member 32 is in the first position, it abuts against the magnetic rod assembly 2 in the first direction at the insertion port 13 of the corresponding mounting slot 11, thereby achieving relative fixation between the magnetic rod assembly 2 and the mounting bracket 1. When the locking member 32 is in the second position, it is staggered from the magnetic rod assembly 2 in the slot opening direction, so that the magnetic rod assembly 2 can be detached from the mounting slot 11 through the insertion port 13, and can also be inserted into the mounting slot 11 through the insertion port 13.

[0035] In this way, the installation, fixation and removal of the magnetic rod assembly 2 in the mounting slot 11 can be realized by changing the position of the locking member 32 relative to the mounting frame 1; the number of magnetic rod assemblies 2 on the mounting frame 1 can be set according to the actual sample capacity so that the number of magnetic rod assemblies 2 matches the sample capacity. This can avoid the use of extra magnetic rod sleeves in the nucleic acid extraction process, avoid waste of magnetic rod sleeves, and help reduce the operating cost of the nucleic acid extraction instrument.

[0036] In some embodiments, the locking member 32 has an operating end 321 and a locking end 323 located at both ends of the mounting groove 11 in the groove orientation. The operating end 321 is located on the side of the mounting bracket 1 away from the magnetic rod assembly 2 in the groove orientation of the mounting groove 11. The locking end 323 is located in the mounting groove 11 when the locking member 32 is in the first position and abuts against the mounting plate 21 of the magnetic rod assembly 2 in a first direction. The operator can switch the locking member 32 to a first position and a second position by operating the operating end 321.

[0037] In some embodiments, the locking member 32 can be installed on the mounting bracket 1 by means of a threaded connection, and the entire locking member 32 can be switched between a first position and a second position by rotating the operating end 321 in both the forward and directional directions.

[0038] In some embodiments, for ease of operation, please continue to refer to... Figure 1 , Figure 4 and Figure 5 The locking structure 3 also includes an elastic element 33, which can be a coil spring or a rubber spring. The elastic element 33 is used to apply an elastic force to the locking element 32 to keep the locking element 32 in the first position. The locking element 32 can be moved toward the second position by operating the operating end 321 to overcome the elastic force.

[0039] In one embodiment, the mounting bracket 1 is provided with a through hole for the locking member 32 to pass through. The operating end 321 can abut against the mounting bracket 1 in the direction of the through hole extension, that is, in the direction of the slot. The elastic member 33 can be located between the operating end 321 and the mounting bracket 1. One end of the elastic member 33 is connected to the operating end 321 and the other end is connected to the mounting bracket 1. The elastic member 33 can apply an elastic pulling force towards the mounting bracket 1 to the operating end 321 so that the locking member 32 is kept in the first position. The locking member 32 can be switched from the first position to the second position by pulling the operating end 321 away from the mounting bracket 1.

[0040] In another embodiment, both the operating end 321 and the locking end 323 abut against the mounting bracket 1 with the slot facing upwards. The elastic member 33 can be located between the locking end 323 and the mounting bracket 1. The elastic member 33 can be pressed between the locking end 323 and the mounting bracket 1. The elastic member 33 can apply elastic pressure away from the mounting bracket 1 to the locking member 32 so that the locking member 32 is held in the first position. The locking member 32 can be switched from the first position to the second position by pulling the operating end 321 away from the mounting bracket 1.

[0041] In some embodiments, to increase the travel distance of the locking member 32 between the first and second positions, thereby increasing the contact area between the locking member 32 and the magnetic rod assembly 2, the locking structure 3 further includes a fixing seat 31. Please refer to [link / reference needed]. Figure 1 , Figure 4 and Figure 5 The fixing base 31 can be installed on the side of the mounting frame 1 away from the magnetic rod assembly 2 by screws in the groove of the mounting slot 11. The locking member 32 passes through the fixing base 31. The operating end 321 and the locking end 323 are arranged on both sides of the fixing base 31 in the groove of the mounting slot 11. Both the operating end 321 and the locking end 323 can abut against the fixing base 31 in the groove of the mounting slot 11 to limit the movement of the locking member 32 relative to the fixing base 31 in the groove of the mounting slot 11.

[0042] In some embodiments, please continue to refer to Figure 4 and Figure 5 The mounting base 31 includes a base body 312 and a limiting plate 314. The base body 312 has a through hole 313 through which the locking member 32 passes. The limiting plate 314 is connected to one end of the base body 312 in the extending direction of the through hole 313. The limiting plate 314 blocks part of the through hole 313. The limiting plate 314 can abut against the operating end 321 and the locking end 323 in the upward orientation of the groove of the mounting groove 11 to prevent the locking member 32 from coming out of the through hole 313.

[0043] The limiting plate 314 can be formed with the seat 312 at the position of the through hole 313 to form a guide hole 315. The size of the guide hole 315 can be smaller than the size of the through hole 313. The locking member 32 has a guide section 322 connecting the operating end 321 and the locking end 323. In the direction of the groove opening of the vertical mounting groove 11, the cross-sectional size of the guide section 322 is smaller than the cross-sectional size of the operating end 321 and also smaller than the cross-sectional size of the locking end 323. The cross-sectional shape of the guide section 322 is adapted to the cross-sectional shape of the guide hole 315. The size of the guide section 322 in the direction of the groove opening of the mounting groove 11 is larger than the size of the guide hole 315. Thus, the reciprocating guide movement of the locking member 32 in the direction of the groove opening of the mounting groove 11 can be realized through the cooperation of the guide hole 315 and the guide section 322.

[0044] In some embodiments, the cross-sectional dimensions of the locking end 323 and the operating end 321 are both larger than the cross-sectional dimensions of the through hole 313 in the direction of the opening of the vertical mounting groove 11. To facilitate the installation of the locking member 32 in the fixing base 31, the locking member 32 is provided to include a first part 325 and a second part 326 arranged in the direction of the opening of the mounting groove 11. The first part 325 and the second part 326 are connected by threads at the guide section 322. The operating end 321 is located in the first part 325 and the locking end 323 is located in the second part 326. The second part 326 or the first part 325 can be inserted into the through hole 313 to realize the connection between the first part 325 and the second part 326, so as to facilitate the installation of the locking member 32 into the through hole 313 of the fixing member.

[0045] In some embodiments, the fixing base 31 can also be set as an integral structure, and the through hole 313 includes a large diameter hole section and a small diameter hole section. The small diameter hole section can form a guide hole 315 that guides and cooperates with the guide section 322 on the locking member 32, so as to realize the reciprocating guide movement of the locking member 32 in the direction of the groove opening of the mounting groove 11.

[0046] In some embodiments, please continue to refer to Figure 5 The fixing base 31 has a groove 316. When the locking member 32 is in the second position, at least a portion of the locking member 32 is located in the groove 316. The locking end 323 can be avoided by the groove 316. This can increase the reciprocating stroke of the locking member 32 while reducing the size of the mounting bracket 1 in the direction of the groove opening of the mounting slot 11.

[0047] The seat body 312 and the limiting plate 314 in the fixed seat 31 form a groove 316, or the large-diameter hole section of the through hole 313 forms a groove 316; the guide hole 315 is located on the bottom wall of the groove 316, with the groove opening of the vertical mounting groove 11 facing upward. The cross-sectional dimension of the groove 316 is larger than the cross-sectional dimension of the locking end 323, so as to satisfy that the locking end 323 can retract into the groove 316 when the locking member 32 is in the second position.

[0048] In some embodiments, please continue to refer to Figure 5 The elastic element 33 is located in the groove 316. The elastic element 33 is elastically pressed between the bottom wall of the groove 316 and the locking end 323. This facilitates the installation and positioning of the elastic element 33. The cross-sectional shape of the groove 316 facing the groove opening of the vertical mounting groove 11 can be set to be circular. The side wall of the groove 316 can guide the elastic deformation of the elastic element 33 facing the groove opening of the mounting groove 11, so as to ensure that the elastic element 33 can only elastically expand and contract in the direction of the groove opening of the mounting groove 11.

[0049] In some embodiments, the groove 316 on the fixing base 31 can be omitted, or even the fixing base 31 can be omitted altogether. Instead, the groove 316 can be provided on the bottom wall of the mounting groove 11 on the mounting bracket 1 to avoid the locking end 323 when the locking member 32 is in the second position. The elastic member 33 can also be provided in the groove 316 to achieve the installation and fixation of the elastic member 33. Alternatively, in other embodiments, the groove 316 can be omitted on both the fixing base 31 and the mounting bracket 1, which can increase the depth of the mounting groove 11 and leave space between the mounting plate 21 and the bottom wall of the mounting groove 11. When the locking member 32 is in the second position, the reserved space will avoid the locking end 323.

[0050] In some embodiments, please refer to Figure 3 and Figure 5 The locking end 323 on the locking member 32 has a locking surface 324 that abuts against the mounting plate 21 of the magnetic rod assembly 2 in a first direction. In the direction from the bottom wall of the mounting groove 11 to the groove opening, the locking surface 324 is gradually moved away from the mounting plate 21 in the first direction. In the process of the locking member 32 switching from the second position to the first position, under the action of the locking end 323 and the mounting plate 21 abutting in the first direction, the locking surface 324 can push the mounting plate 21 away from the socket 13 in the first direction. In this way, the magnetic rod assembly 2 is pressed and fixed in the mounting groove 11 in the first direction by the locking surface 324, which can improve the installation stability of the magnetic rod assembly 2 in the mounting groove 11.

[0051] In some embodiments, please continue to refer to Figure 3 and Figure 5 The locking surface 324 can be an inclined surface. The end of the mounting plate 21 in the corresponding magnetic rod assembly 2 in the first direction has a locking mating surface 22 that fits with the locking surface 324. The locking mating surface 22 is also an inclined surface. During the process of switching the locking member 32 from the second position to the first position, the locking member 32 can be wedged onto the mounting plate 21 in the first direction through the locking surface 324 and the locking mating surface 22. This helps to achieve self-locking between the locking member 32 and the mounting plate 21, thus preventing the magnetic rod assembly 2 from falling off and further improving the installation stability of the magnetic rod assembly 2 in the mounting groove 11.

[0052] In some embodiments, the locking member 32 is threaded onto the mounting bracket 1, and the outer peripheral surface of the locking end 323 is a conical surface. Alternatively, a locking mating surface 22 with the same inclination angle as the conical surface can be provided at the end of the mounting plate 21 in the first direction. When the locking member 32 is in the first position, the outer peripheral surface of the locking end 323 is in line contact with the locking mating surface 22 on the mounting plate 21. This also allows the locking member 32 to wedge the mounting plate 21 in the first direction, thereby improving the installation stability of the magnetic rod assembly 2 in the mounting groove 11.

[0053] Of course, in other embodiments, the locking surface 324 may also be a curved surface, an arc surface, or a planar structure perpendicular to the first direction.

[0054] This application also discloses a nucleic acid extractor, which includes an extraction module and a magnetic rod quick-release assembly as described in any of the above embodiments. The extraction module has an oscillating Z-axis, and the magnetic rod quick-release assembly can be mounted on the oscillating Z-axis through a mounting bracket 1 to achieve a fixed connection between the extraction module and the magnetic rod quick-release assembly.

[0055] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A quick-release magnetic rod assembly, characterized in that, include: The mounting bracket is used to install on the extraction module of a nucleic acid extractor. It has multiple spaced mounting slots that extend in a first direction. The mounting bracket has multiple sockets at its end in the first direction that correspond to and communicate with each of the mounting slots. Multiple magnetic rod assemblies are provided, and each corresponds to a mounting slot. The magnetic rod assembly is installed in the corresponding mounting slot, and the magnetic rod assembly abuts against the side wall of the corresponding mounting slot facing upwards. The locking structure is provided in multiple ways, and each locks one-to-one with the mounting slot. The locking structure includes a locking member, which is reciprocally mounted on the mounting bracket with the slot opening facing upward. The locking member has a first position at the insertion point that abuts against the magnetic rod assembly in the first direction, and a second position that avoids the magnetic rod assembly.

2. The magnetic rod quick-release assembly as described in claim 1, characterized in that, The locking structure further includes an elastic element for applying an elastic force to the locking element to hold the locking element in the first position.

3. The magnetic rod quick-release assembly as described in claim 2, characterized in that, The locking structure further includes a fixing seat, which is mounted on the mounting bracket. The locking member passes through the fixing seat. The locking member has an operating end and a locking end located on both sides of the fixing seat in the groove orientation of the mounting slot. The locking end is used to abut against the magnetic rod assembly. Both the operating end and the locking end can abut against the fixing seat in the groove orientation of the mounting slot.

4. The magnetic rod quick-release assembly as described in claim 3, characterized in that, The fixing seat includes a seat body and a limiting plate. The seat body has a through hole through which the locking member passes. The limiting plate is connected to one end of the seat body in the extending direction of the through hole. The limiting plate and the operating end abut against each other in the upward orientation of the groove of the mounting slot.

5. The magnetic rod quick-release assembly as described in claim 3, characterized in that, The fixing base has a groove, and when the locking member is in the second position, at least a portion of the locking end is located within the groove.

6. The magnetic rod quick-release assembly as described in claim 3, characterized in that, The fixing seat has a groove, the elastic element is located in the groove, and the elastic element is elastically pressed between the fixing seat and the locking end.

7. The magnetic rod quick-release assembly as described in any one of claims 1 to 6, characterized in that, The locking member has a locking surface that abuts against the magnetic rod assembly in the first direction, and the locking surface is gradually disposed away from the magnetic rod assembly in the first direction from the bottom wall of the mounting groove to the groove opening.

8. The magnetic rod quick-release assembly as described in claim 7, characterized in that, The locking surface is an inclined surface, and the magnetic rod assembly has a locking mating surface that fits against the locking surface.

9. The magnetic rod quick-release assembly as described in any one of claims 1 to 6, characterized in that, The mounting groove has a limiting protrusion extending toward the inside of the mounting groove at the groove opening. The magnetic rod assembly includes a mounting plate and a plurality of magnetic rods connected to the mounting plate. The plurality of magnetic rods are spaced apart in the first direction. At least a portion of the mounting plate is located between the limiting protrusion and the bottom wall of the mounting groove in the groove opening direction. The mounting plate and the limiting protrusion abut against each other in the groove opening direction.

10. A nucleic acid extractor, characterized in that, It includes an extraction module and a magnetic rod quick-release assembly as described in any one of claims 1 to 9.

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