Nucleic acid detection kit

Abstract

The utility model discloses a nucleic acid detection kit and relates to the technical field of nucleic acid detection. According to the main technical scheme, the device comprises a base, a lifting mechanism, a hollow round cover and a support, wherein the lifting mechanism is arranged on the base; the hollow round cover is arranged on the lifting mechanism, and a containing groove is formed in the upper end face of the hollow round cover and used for being matched with the lower end of the round pipe. The support is arranged on the base and located above the hollow round cover, a limiting hole is formed in the upper end face of the support and corresponds to the containing groove, and the hole wall of the limiting hole is used for being attached to the outer wall of the upper end of the round pipe. The lower end and the upper end of the circular pipe are laterally limited, so that the purposes that the stability of the circular pipe is improved in the process that the lifting mechanism drives the hollow circular cover and the circular pipe to ascend and descend, and then the risk that the circular pipe shakes or inclines due to movement is reduced are expected to be achieved.

Description

Technical Field

[0001] This utility model relates to the field of nucleic acid detection technology, specifically to a nucleic acid detection kit. Background Technology

[0002] When extracting nucleic acid for testing, the sample to be tested needs to be added to the nucleic acid detection kit first, and then the nucleic acid detection kit containing the sample is placed into the nucleic acid extraction device for nucleic acid extraction.

[0003] The prior art discloses a nucleic acid extraction kit with a reagent tube lifting function, including a base, an electrically operated telescopic column on the base, and a placement component installed on the electrically operated telescopic column. The placement component includes a hollow round cap and recessed grooves formed around the inner wall of the hollow round cap. A round tube is movably installed in the inner cavity of the hollow round cap. Insertion strips are installed around the lower outer wall of the round tube. The insertion strips are movably embedded in the inner cavity of the recessed grooves. After the electrically operated telescopic column raises the hollow round cap and the round tube, when the operator extracts liquid in the round tube, the round tube is limited by the recessed grooves, resulting in better placement stability.

[0004] However, in actual use, fixing only the lower end of the round tube greatly reduces the stability of the round tube during the process of the electric telescopic column driving the hollow round cover and the round tube to rise and fall. Utility Model Content

[0005] The purpose of this invention is to provide a nucleic acid detection kit that solves the problem of nucleic acid extraction kits with reagent tube lifting function. In actual use, only the lower end of the round tube is fixed, which greatly reduces the problem of the stability of the round tube during the process of the electric telescopic column driving the hollow round cover and the round tube to lift and lower.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A nucleic acid detection kit includes a base, a lifting mechanism, a hollow round cover, and a support. The lifting mechanism is disposed on the base. The hollow round cover is disposed on the lifting mechanism, and a receiving groove is formed on the upper surface of the hollow round cover for fitting the lower end of a round tube. The support is disposed on the base and is located above the hollow round cover. A limiting hole is formed on the upper surface of the support, and the limiting hole corresponds to the receiving groove. The wall of the limiting hole is used to fit against the outer wall of the upper end of the round tube.

[0008] A further technical solution is that the nucleic acid detection kit further includes an elastic sheet; the elastic sheet is disposed on the wall of the limiting hole; the end of the elastic sheet away from the wall of the limiting hole is bent along the direction from the upper end of the limiting hole to the lower end of the limiting hole, or along the direction from the lower end of the limiting hole to the upper end of the limiting hole, and the end of the elastic sheet away from the wall of the limiting hole is used to fit against the outer wall of the upper end of the circular tube.

[0009] A further technical solution is that the number of elastic sheets is set to several, and these elastic sheets are evenly distributed around the axis of the limiting hole.

[0010] A further technical solution is: the wall of the receiving groove is provided with a first limiting groove; the first limiting groove extends along the opening of the receiving groove toward the bottom of the receiving groove, and the first limiting groove is used to fit with the insertion strip on the outer wall of the lower end of the round tube.

[0011] A further technical solution is: a second limiting groove is provided at the lower end of the accommodating groove wall; the second limiting groove is provided on the inner side of the accommodating groove wall; the upper end of the second limiting groove is connected to the lower end of the first limiting groove, and the upper groove wall of the second limiting groove is used to fit against the upper end face of the insertion strip on the outer wall of the lower end of the round tube.

[0012] A further technical solution is that a spring is provided at the bottom of the receiving groove; the spring extends along the bottom of the receiving groove towards the opening of the receiving groove, and the end of the spring away from the bottom of the receiving groove is used to abut against the lower end face of the circular tube.

[0013] A further technical solution is that the nucleic acid detection kit also includes a support plate; the support plate is disposed at the end of the spring away from the bottom of the receiving groove, and the end of the support plate away from the spring is used to abut against the lower end face of the circular tube.

[0014] A further technical solution is as follows: the bracket includes a support column and a limiting plate; the support column is disposed on the base; the limiting plate is disposed at the end of the support column away from the base; the limiting plate is located above the hollow round cover, and the limiting hole is opened on the surface of the limiting plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] During the lifting process of the lifting mechanism, the hollow round cover limits the lower end of the round tube to improve the stability of the round tube as it is lifted, thereby reducing the risk of swaying or tilting due to movement. Simultaneously, the round tube slides up and down relative to the bracket within the limiting hole. This utilizes the hole wall to laterally limit the upper end of the round tube, further improving its stability during the lifting process and reducing the risk of swaying or tilting due to movement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front view structure of a nucleic acid detection kit in this embodiment;

[0018] Figure 2 This is a top view of a nucleic acid detection kit in this embodiment;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0020] Figure 4 This is a front view of a nucleic acid detection kit in this embodiment, showing the circular tube inserted into the first limiting groove.

[0021] Figure 5 This is a top view of a nucleic acid detection kit in this embodiment, showing the structure of the round tube inserted into the first limiting groove.

[0022] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at point BB;

[0023] Figure 7 This is a schematic diagram of the main structure of a nucleic acid detection kit in this embodiment when the circular tube is inserted into the first limiting groove;

[0024] Figure 8 This is a top view of a nucleic acid detection kit in this embodiment, showing the structure of the round tube inserted into the first limiting groove.

[0025] Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure at the CC section.

[0026] The attached diagram shows the markings and corresponding component names:

[0027] 1-Base; 2-Lifting mechanism; 3-Hollow round cover; 4-Accommodation slot;

[0028] 5-Bracket; 51-Support column; 52-Limiting plate;

[0029] 6-Limiting hole; 7-Elastic sheet; 8-First limiting groove; 9-Second limiting groove; 10-Spring; 11-Support plate; 12-Round tube; 13-Insert strip. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] Example 1

[0032] This embodiment provides a nucleic acid detection kit, such as... Figures 1-9 As shown, the device includes a base 1, a lifting mechanism 2, a hollow round cover 3, and a bracket 5. The lifting mechanism 2 is mounted on the base 1. The hollow round cover 3 is mounted on the lifting mechanism 2, and a receiving groove 4 is provided on the upper surface of the hollow round cover 3. The receiving groove 4 is used to fit the lower end of the round tube 12. The bracket 5 is mounted on the base 1 and is located above the hollow round cover 3. A limiting hole 6 is provided on the upper surface of the bracket 5. The limiting hole 6 corresponds to the receiving groove 4, and the hole wall of the limiting hole 6 is used to fit against the outer wall of the upper end of the round tube 12.

[0033] For example, in implementation, the structure and arrangement of the base 1 and the lifting mechanism 2 can adopt the structure in the existing patent application number 202321028778.4. The lifting mechanism 2 can also adopt a hydraulic telescopic rod, cylinder, or other structure. The lifting mechanism 2 is fixed to the upper surface of the base 1 by welding, screwing, or other methods, and the lifting mechanism 2 extends and retracts along the direction from the lower end of the base 1 to the upper end of the base 1.

[0034] The hollow round cover 3 is connected to the upper end of the telescopic mechanism by means of screwing, welding, or other methods. A receiving groove 4 is provided on the upper surface of the hollow round cover 3, which is used to fit the lower end of the round tube 12. That is, the shape and size of the receiving groove 4 are adapted to the lower end of the round tube 12 to be used. This is intended to ensure that when the round tube 12 is placed inside the hollow round cover 3, the lower end of the round tube 12 can be positioned and stabilized.

[0035] The bracket 5 is installed on the base 1 by welding, screwing, or other methods, and is located directly above the hollow round cover 3. A limiting hole 6 is formed on the upper surface of the bracket 5, corresponding to the receiving groove 4 on the hollow round cover 3. That is, the limiting hole 6 is located directly above the receiving groove 4. The diameter of the limiting hole 6 is slightly larger than the outer diameter of the round tube 12. This is intended to allow the round tube 12 to be smoothly inserted into the limiting hole 6 while also providing lateral restraint on the upper end of the round tube 12.

[0036] During use, one end of the round tube 12 is inserted through the limiting hole 6 of the bracket 5 and into the receiving groove 4 on the hollow round cover 3 of the base 1. When it is necessary to extract the liquid from the round tube 12, the operator can use the lifting mechanism 2 to raise the hollow round cover 3 and the round tube 12 on the hollow round cover 3 to an appropriate height. This is intended to adjust the height of the round tube 12 so that the operator can easily extract the liquid from it.

[0037] like Figure 5 As shown, during the lifting process of the lifting mechanism 2, the hollow round cover 3 limits the lower end of the round tube 12, aiming to improve the stability of the round tube 12 during the lifting process of the lifting mechanism 2 driving the hollow round cover 3 and the round tube 12, thereby reducing the risk of the round tube 12 swaying or tilting due to movement. Simultaneously, the round tube 12 slides up and down relative to the bracket 5 within the limiting hole 6. This aims to achieve lateral limiting of the upper end of the round tube 12 using the wall of the limiting hole 6, further improving the stability of the round tube 12 during the lifting process of the lifting mechanism 2 driving the hollow round cover 3 and the round tube 12, thereby reducing the risk of the round tube 12 swaying or tilting due to movement.

[0038] Example 2

[0039] Based on the above embodiment 1, in this embodiment, as follows: Figures 4-6 As shown, the nucleic acid detection kit further includes an elastic sheet 7; the elastic sheet 7 is disposed on the wall of the limiting hole 6; the end of the elastic sheet 7 away from the wall of the limiting hole 6 bends along the upper end of the limiting hole 6 towards the lower end of the limiting hole 6, or along the lower end of the limiting hole 6 towards the upper end of the limiting hole 6, and the end of the elastic sheet 7 away from the wall of the limiting hole 6 is used to fit against the outer wall of the upper end of the circular tube 12.

[0040] For example, in the implementation process, the nucleic acid test kit also includes an elastic sheet 7, which is installed in the limiting hole 6 and is fixed to the hole wall of the limiting hole 6 by means of welding, screwing or other methods. The end of the elastic sheet 7 away from the hole wall of the limiting hole 6 can be bent along the direction of the limiting hole 6 (upward or downward) as needed.

[0041] In use, when the round tube 12 is inserted into the receiving groove 4 along the limiting hole 6, as... Figure 6 As shown, the end of the elastic piece 7 away from the wall of the limiting hole 6 bends along the upper end of the limiting hole 6 towards the lower end of the limiting hole 6, and the end of the elastic piece 7 away from the wall of the limiting hole 6 fits tightly against the outer wall of the circular tube 12, thereby increasing the lateral support force on the circular tube 12. This is intended to improve the stability of the circular tube 12 when placed and reduce the risk of the circular tube 12 swaying or tilting due to movement.

[0042] When the lifting mechanism 2 extends, driving the circular tube 12 to move along the receiving groove 4 towards the limiting hole 6, the end of the elastic piece 7 away from the wall of the limiting hole 6 will bend along the lower end of the limiting hole 6 towards the upper end of the limiting hole 6, and the end of the elastic piece 7 away from the wall of the limiting hole 6 will be tightly attached to the outer wall of the circular tube 12, thereby increasing the lateral support force on the circular tube 12. This aims to improve the stability of the circular tube 12 during the process of the lifting mechanism 2 driving the hollow circular cover 3 and the circular tube 12 upwards, thereby reducing the risk of the circular tube 12 swaying or tilting due to movement.

[0043] Specifically, when there are multiple types of circular tubes 12, the lower end dimension of each circular tube 12 is no larger than the diameter of the limiting hole 6, and the lower end of each circular tube 12 can fit into the receiving groove 4. Simultaneously, the upper end dimensions of each circular tube 12 are different, and the upper end dimensions of each circular tube 12 are all smaller than the diameter of the limiting hole 6. Through the elasticity and self-adaptive capability of the elastic piece 7 within the limiting hole 6, it can automatically adjust to accommodate circular tubes 12 with different upper end diameters. This aims to ensure that the upper end of each circular tube 12 receives appropriate clamping force, thereby reducing the risk of the circular tube 12 being unstable due to size differences.

[0044] Preferably, the wall of the receiving groove 4 can also be provided with elastic plates 7, so that the elasticity and self-adaptive ability of the elastic plates 7 in the receiving groove 4 can be automatically adjusted to adapt to the circular tubes 12 with different lower end diameters. This is intended to ensure that the lower end of each circular tube 12 can obtain appropriate clamping force, thereby reducing the risk of the circular tube 12 not being securely fixed due to size differences.

[0045] Example 3

[0046] Based on the above embodiment 2, in this embodiment, as follows: Figure 5 As shown, there are several elastic sheets 7, which are evenly distributed around the axis of the limiting hole 6.

[0047] For example, during implementation, a plurality of elastic plates 7 are provided inside the limiting hole 6, and these plates are evenly distributed around the central axis of the limiting hole 6. This is intended to make the lateral support of the circular tube 12 more uniform, thereby reducing the risk of the circular tube 12 swaying or tilting due to uneven force.

[0048] Example 4

[0049] Based on the above embodiment 1, in this embodiment, as follows: Figure 6 As shown, the groove wall of the receiving groove 4 is provided with a first limiting groove 8; the first limiting groove 8 extends along the groove opening of the receiving groove 4 toward the bottom of the receiving groove 4, and the first limiting groove 8 is used to fit with the insertion strip 13 on the lower outer wall of the round tube 12.

[0050] For example, during implementation, a first limiting groove 8 is provided on the wall of the receiving groove 4. The first limiting groove 8 extends from the opening of the receiving groove 4 to the bottom of the receiving groove 4, and the first limiting groove 8 is adapted to the insertion strip 13 on the lower outer wall of the round tube 12. That is, when the round tube 12 is placed in the receiving groove 4, the insertion strip 13 on the lower outer wall of the round tube 12 will be embedded in the first limiting groove 8.

[0051] When in use, when the round tube 12 is inserted into the receiving groove 4 along the limiting hole 6, the insertion strip 13 on the lower outer wall of the round tube 12 will slide along the first limiting groove 8 until the insertion strip 13 on the lower outer wall of the round tube 12 is adapted to the first limiting groove 8.

[0052] During the process of the lifting mechanism 2 driving the round tube 12 to move, the groove wall of the first limiting groove 8 constrains the insertion bar 13 to rotate around the axis of the receiving groove 4, in order to reduce the risk of the round tube 12 rotating around the axis of the receiving groove 4 within the receiving groove 4, thereby improving the stability of the round tube 12 and reducing the risk of the round tube 12 shaking due to movement.

[0053] Example 5

[0054] Based on the above embodiment 4, in this embodiment, as follows: Figure 6 Combination Figure 9 As shown, a second limiting groove 9 is provided at the lower end of the wall of the receiving groove 4; the second limiting groove 9 is located on the inner side of the wall of the receiving groove 4; the upper end of the second limiting groove 9 is connected to the lower end of the first limiting groove 8, and the upper groove wall of the second limiting groove 9 is used to fit against the upper end face of the insertion strip 13 on the outer wall of the lower end of the round tube 12.

[0055] For example, during implementation, a second limiting groove 9 is provided on the inner side of the lower end of the accommodating groove 4. The second limiting groove 9 extends around the axis of the accommodating groove 4, and the upper end of the second limiting groove 9 communicates with the lower end of the first limiting groove 8. The second limiting groove 9 is used to accommodate the insertion strip 13 on the outer wall of the lower end of the circular tube 12, and the upper groove wall of the second limiting groove 9 can fit against the upper end face of the insertion strip 13 on the outer wall of the lower end of the circular tube 12.

[0056] In use, insert the round tube 12 along the limiting hole 6 toward the receiving groove 4. The insertion strip 13 on the lower outer wall of the round tube 12 will slide along the first limiting groove 8 until the insertion strip 13 on the lower outer wall of the round tube 12 is completely inserted into the second limiting groove 9 at the bottom of the receiving groove 4. At this time, rotate the round tube 12 so that the round tube 12 moves away from the first limiting groove 8 in the direction around the axis of the receiving groove 4 within the second limiting groove 9 until the upper end face of the insertion strip 13 on the lower outer wall of the round tube 12 is in contact with the upper groove wall of the second limiting groove 9. Figure 9As shown. The aim is to use the wall of the second limiting groove 9 to limit the insertion strip 13 on the lower outer wall of the round tube 12, thereby reducing the risk of the round tube 12 sliding out of the receiving groove 4 from the bottom of the receiving groove 4 towards the opening of the receiving groove 4.

[0057] Example 6

[0058] Based on the above embodiment 5, in this embodiment, as follows: Figure 6 As shown, a spring 10 is provided at the bottom of the receiving groove 4; the spring 10 extends along the bottom of the receiving groove 4 toward the opening of the receiving groove 4, and the end of the spring 10 away from the bottom of the receiving groove 4 is used to abut against the lower end face of the circular tube 12.

[0059] For example, in the implementation process, the nucleic acid test kit also includes a spring 10. One end of the spring 10 is fixed to the bottom of the accommodating groove 4 by welding, screwing or other means. The spring 10 extends from the bottom of the accommodating groove 4 toward the opening of the accommodating groove 4, and the end of the spring 10 away from the bottom of the accommodating groove 4 is used to fit against the lower end face of the round tube 12.

[0060] During use, when the round tube 12 is inserted into the receiving groove 4 along the limiting hole 6, the insertion strip 13 on the lower outer wall of the round tube 12 will slide along the first limiting groove 8 until the insertion strip 13 on the lower outer wall of the round tube 12 is completely inserted into the second limiting groove 9 at the bottom of the receiving groove 4. As the insertion strip 13 on the lower outer wall of the round tube 12 slides into the second limiting groove 9 through the first limiting groove 8, the lower end face of the round tube 12 gradually approaches the end of the spring 10 away from the bottom of the receiving groove 4, and comes into contact with the end of the spring 10 away from the bottom of the receiving groove 4, thus compressing the spring 10. When the insertion strip 13 on the lower outer wall of the round tube 12 is completely inserted into the second limiting groove 9 at the bottom of the receiving groove 4, the round tube 12 is rotated so that the round tube 12 moves away from the first limiting groove 8 within the second limiting groove 9 along the direction around the axis of the receiving groove 4. At this point, the external force that rotates the circular tube 12 is released. Under the restoring force of the spring 10, the circular tube 12 slides along the bottom of the receiving groove 4 towards the opening of the receiving groove 4 until the upper end face of the insertion strip 13 on the lower outer wall of the circular tube 12 abuts against the upper groove wall of the second limiting groove 9. This is intended to utilize the upward supporting force provided by the spring 10 to make the circular tube 12 more stable after being inserted into the second limiting groove 9, thereby reducing the risk of the circular tube 12 shaking or tilting.

[0061] Example 7

[0062] Based on the above embodiment 6, in this embodiment, as follows: Figure 6As shown, the nucleic acid test kit also includes a support plate 11; the support plate 11 is disposed at one end of the spring 10 away from the bottom of the receiving groove 4, and the end of the support plate 11 away from the spring 10 is used to abut against the lower end face of the round tube 12.

[0063] For example, in the implementation process, the nucleic acid test kit also includes a support plate 11. The support plate 11 is connected to the end of the spring 10 away from the bottom of the receiving groove 4 by means of welding, snap-fit, etc., and the end of the support plate 11 away from the spring 10 is used to abut against the lower end face of the round tube 12.

[0064] During use, when the round tube 12 is inserted into the receiving groove 4 along the limiting hole 6, the insertion strip 13 on the lower outer wall of the round tube 12 will slide along the first limiting groove 8 until the insertion strip 13 on the lower outer wall of the round tube 12 is completely inserted into the second limiting groove 9 at the bottom of the receiving groove 4. As the insertion strip 13 on the lower outer wall of the round tube 12 slides from the first limiting groove 8 into the second limiting groove 9, the lower end face of the round tube 12 gradually approaches the end of the support plate 11 away from the spring 10, and adheres to the end of the support plate 11 away from the spring 10, thus compressing the spring 10. Figure 9 As shown.

[0065] When the insertion strip 13 on the lower outer wall of the circular tube 12 is fully inserted into the second limiting groove 9 at the bottom of the receiving groove 4, the circular tube 12 is rotated so that it moves away from the first limiting groove 8 within the second limiting groove 9 along the direction around the axis of the receiving groove 4. During the rotation of the circular tube 12, the lower end face of the circular tube 12 slides relative to the end face of the support plate 11 away from the spring 10. This is intended to reduce the friction between the lower end face of the circular tube 12 and the end face of the support plate 11 away from the spring 10, thereby facilitating the rotation of the circular tube 12.

[0066] When the external force that rotates the circular tube 12 is released, the circular tube 12 slides along the bottom of the receiving groove 4 towards the opening of the receiving groove 4 under the restoring force of the spring 10, until the upper end face of the insertion strip 13 on the lower outer wall of the circular tube 12 abuts against the upper groove wall of the second limiting groove 9. This is intended to utilize the upward supporting force provided by the spring 10 to make the circular tube 12 more stable after being inserted into the second limiting groove 9, thereby reducing the risk of the circular tube 12 wobbling or tilting.

[0067] Example 8

[0068] Based on the above embodiment 1, in this embodiment, as follows: Figure 1As shown, the bracket 5 includes a support column 51 and a limiting plate 52; the support column 51 is disposed on the base 1; the limiting plate 52 is disposed at the end of the support column 51 away from the base 1; the limiting plate 52 is located above the hollow round cover 3, and the limiting hole 6 is opened on the surface of the limiting plate 52.

[0069] For example, in implementation, the aforementioned bracket 5 includes a support column 51 and a limiting plate 52. The support column 51 is fixed to the base 1 by welding, screwing, or other methods. The limiting plate 52 is installed on the end of the support column 51 away from the base 1 by welding, screwing, or integral molding, and is located directly above the hollow round cover 3. A limiting hole 6 is formed on the surface of the limiting plate 52, and the position of the limiting hole 6 corresponds to the receiving groove 4 on the hollow round cover 3. This aims to achieve the purpose of positioning the limiting hole 6 directly above the receiving groove 4.

[0070] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A nucleic acid detection kit, characterized in that, include: Base (1); A lifting mechanism (2) is provided on the base (1); Hollow round cover (3), the hollow round cover (3) is disposed on the lifting mechanism (2), and the upper end face of the hollow round cover (3) is provided with a receiving groove (4), the receiving groove (4) is used to fit the lower end of the round tube (12); A bracket (5) is provided on the base (1) and is located above the hollow round cover (3). A limiting hole (6) is provided on the upper end face of the bracket (5). The limiting hole (6) corresponds to the receiving groove (4), and the hole wall of the limiting hole (6) is used to fit against the outer wall of the upper end of the round tube (12).

2. The nucleic acid detection kit according to claim 1, characterized in that: It also includes elastic sheet (7); The elastic sheet (7) is disposed on the wall of the limiting hole (6); The end of the elastic sheet (7) away from the wall of the limiting hole (6) bends along the upper end of the limiting hole (6) towards the lower end of the limiting hole (6), or along the lower end of the limiting hole (6) towards the upper end of the limiting hole (6), and the end of the elastic sheet (7) away from the wall of the limiting hole (6) is used to fit against the outer wall of the upper end of the round tube (12).

3. The nucleic acid detection kit according to claim 2, characterized in that: The number of elastic sheets (7) is set to several, and the several elastic sheets (7) are evenly distributed around the axis of the limiting hole (6).

4. The nucleic acid detection kit according to claim 1, characterized in that: The accommodating groove (4) has a first limiting groove (8) on its groove wall; The first limiting groove (8) extends along the opening of the receiving groove (4) toward the bottom of the receiving groove (4), and the first limiting groove (8) is used to fit with the insertion strip (13) on the lower outer wall of the round tube (12).

5. The nucleic acid detection kit according to claim 4, characterized in that: The lower end of the wall of the receiving groove (4) is provided with a second limiting groove (9); The second limiting groove (9) is disposed on the inner side of the groove wall of the receiving groove (4); The upper end of the second limiting groove (9) is connected to the lower end of the first limiting groove (8), and the upper groove wall of the second limiting groove (9) is used to fit against the upper end face of the insert strip (13) on the lower outer wall of the round tube (12).

6. The nucleic acid detection kit according to claim 5, characterized in that: A spring (10) is provided at the bottom of the receiving groove (4); The spring (10) extends from the bottom of the receiving groove (4) toward the opening of the receiving groove (4), and the end of the spring (10) away from the bottom of the receiving groove (4) is used to abut against the lower end face of the round tube (12).

7. The nucleic acid detection kit according to claim 6, characterized in that: It also includes a support plate (11); The support plate (11) is located at the end of the spring (10) away from the bottom of the receiving groove (4), and the end of the support plate (11) away from the spring (10) is used to abut against the lower end face of the round tube (12).

8. The nucleic acid detection kit according to claim 1, characterized in that: The bracket (5) includes a support column (51) and a limiting plate (52); The support column (51) is disposed on the base (1); The limiting plate (52) is disposed at the end of the support column (51) away from the base (1); The limiting plate (52) is located above the hollow round cover (3), and the limiting hole (6) is opened on the surface of the limiting plate (52).

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