Fixing device for nucleic acid extraction consumables

Abstract

The utility model relates to a fixing device for nucleic acid extraction consumables, which comprises a drawing frame which is used for placing the consumables and can be fixed in a nucleic acid extractor, and the drawing frame is provided with a fixing mechanism which is used for fixing the consumables on the drawing frame so as to limit the degree of freedom of the consumables in the vertical direction. According to the utility model, the consumable is locked and fixed on the drawing frame through the fixing mechanism, so that the consumable can be conveniently and quickly placed at a fixed position in the nucleic acid extraction instrument, and the position of the consumable cannot be changed in the whole nucleic acid extraction operation process, so that the nucleic acid extraction effect is improved; nucleic acid extraction of the to-be-detected sample can be fully completed, and nucleic acid release is more sufficient.

Description

Technical Field

[0001] This utility model relates to the field of molecular diagnostic technology, and in particular to a fixation device for nucleic acid extraction consumables. Background Technology

[0002] Molecular diagnostics refers to technologies that use DNA and RNA as diagnostic materials and employ molecular biology techniques to diagnose human conditions and diseases by detecting the presence, defects, or abnormal expression of genes. Its basic principle is to detect changes in the structure, quantity, and expression function of DNA or RNA to determine whether the subject has abnormal changes at the gene level, which is of great significance for disease prevention, prediction, diagnosis, treatment, and prognosis. In simple terms, all methodologies and techniques based on molecular biology fall under the category of molecular diagnostics, such as polymerase chain reaction (PCR) and gene sequencing.

[0003] To complete molecular diagnostic testing on a sample, nucleic acid extraction and nucleic acid amplification steps are required. Nucleic acid extraction refers to the mechanical operation of various reagents and instruments to release nucleic acids (DNA or RNA) from cells or viruses and remove impurities other than nucleic acids. Nucleic acid amplification refers to the replication and amplification of the extracted nucleic acids through PCR technology.

[0004] The instrument required for nucleic acid extraction from test samples is a nucleic acid extractor. One type of nucleic acid extractor is the single-sample, on-demand type. This type of extractor can immediately perform nucleic acid extraction after receiving a single sample. However, the consumables (containers for the test sample and reagents required for nucleic acid extraction) used with this type of extractor are somewhat special. During the mechanical operation of the extractor on the test sample and reagents in the consumables, the consumables are prone to displacement. This displacement causes changes in the relative position of the consumables and the extractor, which is detrimental to the nucleic acid extraction process and affects the extraction efficiency, resulting in incomplete nucleic acid extraction.

[0005] Therefore, based on years of experience and practice in related industries, the inventor proposes a fixing device for nucleic acid extraction consumables to overcome the shortcomings of existing technologies. Utility Model Content

[0006] The purpose of this invention is to provide a fixing device for nucleic acid extraction consumables. This invention uses a fixing mechanism to lock and fix the consumables on the rack, which can conveniently and quickly place the consumables in a fixed position inside the nucleic acid extractor and ensure that the consumables will not change position during the entire nucleic acid extraction operation, thereby improving the nucleic acid extraction effect and allowing the sample to be tested to be fully extracted and released more completely.

[0007] The purpose of this utility model is achieved as follows: a fixing device for nucleic acid extraction consumables includes a drawer for placing consumables, and the drawer is provided with a fixing mechanism for fixing the consumables on the drawer to restrict the degree of freedom of the consumables in the vertical direction.

[0008] In a preferred embodiment of the present invention, the drawer is provided with at least one placement slot for holding the consumables, the length extension direction of the placement slot is the same as the length extension direction of the drawer, and the fixing mechanism is provided on at least one side of the drawer in the width direction.

[0009] In a preferred embodiment of the present invention, at least one side of the drawer in the width direction is provided with a movable groove for accommodating the fixing mechanism, and at least two upwardly protruding partitions spaced apart along the length direction of the drawer are provided at the top of the movable groove, and the interval between two adjacent partitions forms a pressing groove for locking the fixing mechanism.

[0010] In a preferred embodiment of the present invention, the fixing mechanism includes a movable strip that can move along the movable groove. At least one pressure plate protruding upward and used for locking and fixing the consumable is provided at the top of the movable strip. The pressure plate is movably sleeved in the pressure plate groove along with the movable strip. The pressure plate groove includes a pressure plate locking position and a pressure plate unlocking position.

[0011] In a preferred embodiment of this utility model, a plurality of limiting members are provided at intervals along the length extension direction of the drawer in the moving groove, and a plurality of limiting grooves adapted to the limiting members are provided on the moving strip. The dimension of the limiting groove along the length extension direction of the drawer is larger than the dimension of the limiting member along the length extension direction of the drawer. The limiting member cooperates with the limiting groove to restrict the moving path of the moving strip.

[0012] In a preferred embodiment of the present invention, the fixing mechanism further includes a push button movably connected to the drawer, the push button being fixedly connected to the moving bar, and the moving bar being driven to reciprocate within the moving groove by driving the push button.

[0013] In a preferred embodiment of the present invention, the drawer is provided with a push button receiving groove, and a positioning pin is provided in the push button receiving groove along the length extension direction of the drawer. The push button is movably sleeved on the positioning pin. A spring is sleeved on the positioning pin, and the two ends of the spring are respectively abutted and connected to the push button and the drawer.

[0014] In a preferred embodiment of the present invention, the top surface of the push button is a flat or arched surface, and the top surface of the push button is provided with concave and convex teeth for increasing the coefficient of friction.

[0015] In a preferred embodiment of this utility model, the placement groove is provided as a multi-hole groove or a single-hole groove.

[0016] In a preferred embodiment of the present invention, the drawer is provided with a sample hole for receiving a sample tube, and a pressing member is provided in the sample hole to compress the sample tube by radial deformation along the sample hole.

[0017] As described above, the fixation device for nucleic acid extraction consumables of this utility model has the following beneficial effects:

[0018] This invention features a fixing mechanism installed on the drawer. When the consumables are placed on the drawer, the fixing mechanism can easily and quickly lock and fix the consumables on the drawer, restricting the vertical freedom of the consumables. This prevents the consumables from changing position and affecting the nucleic acid extraction effect when the nucleic acid extractor performs nucleic acid extraction operations on various reagents in the consumables.

[0019] This invention allows for convenient and quick placement of consumables in a fixed position within the nucleic acid extractor, ensuring that the consumables remain in the same position throughout the entire nucleic acid extraction process. This improves the effectiveness of nucleic acid extraction, allowing the sample to be fully extracted and released more completely. Attached Figure Description

[0020] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0021] Figure 1 This is a schematic diagram of the fixing device for nucleic acid extraction consumables of this utility model when no consumables are installed.

[0022] Figure 2 This is a schematic diagram showing the state of the fixing device for nucleic acid extraction consumables of this utility model after the consumables are placed.

[0023] Figure 3 This is a schematic diagram of Embodiment 1 of the present invention.

[0024] Figure 4 This is a cross-sectional perspective view of Embodiment 1 of the present invention.

[0025] Figure 5 This is a schematic diagram of the fixed consumables in Embodiment 1 of this utility model.

[0026] Figure 6 This is a schematic diagram of the initial state of the consumables in Embodiment 1 of this utility model when they are not placed in the drawer.

[0027] Figure 7 This is a schematic diagram of Embodiment 1 of the present invention, showing the push button moving the moving bar away from the placement slot when the consumable is not placed in the drawer.

[0028] Figure 8 This is a schematic diagram of Embodiment 1 of the present invention, showing the consumables not locked in the placement slot.

[0029] Figure 9 This is a schematic diagram of embodiment 1 of the present invention, showing the consumable being locked in the placement slot.

[0030] Figure 10 This is a schematic diagram of Embodiment 2 of the present invention.

[0031] In the picture:

[0032] 1. Drawer rack;

[0033] 101. Plating slot; 102. Moving slot; 103. Tableting slot; 104. Limiting component; 105. Partition; 106. Sample hole; 107. Extrusion component;

[0034] 2. Consumables;

[0035] 201. Consumable board; 202. Notch;

[0036] 3. Fixed mechanism;

[0037] 301. Push button; 302. Moving strip; 303. Pressing plate; 304. Limiting groove;

[0038] 4. Spring;

[0039] 5. Positioning pin;

[0040] 6. Base. Detailed Implementation

[0041] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0042] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the present invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on this invention, and these should all be considered within the scope of this invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal connections between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] like Figures 1 to 10 As shown, this utility model provides a fixing device for nucleic acid extraction consumables, including a drawer 1 for placing consumable 2, and a fixing mechanism 3 for fixing consumable 2 on the drawer 1 to restrict the degree of freedom of consumable 2 in the vertical direction.

[0045] A fixing mechanism 3 is installed on the drawer 1. When the consumable 2 is placed on the drawer 1, the fixing mechanism 3 can easily and quickly lock the consumable 2 on the drawer 1, restricting the vertical freedom of the consumable 2. This can prevent the consumable 2 from changing position and affecting the nucleic acid extraction effect when the nucleic acid extractor performs nucleic acid extraction operations on various reagents in the consumable 2.

[0046] This invention allows for convenient and quick placement of the consumable 2 in a fixed position within the nucleic acid extractor, ensuring that the consumable 2 remains in its position throughout the entire nucleic acid extraction process. This improves the effectiveness of nucleic acid extraction, allowing the sample to be fully extracted and released more completely.

[0047] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 10 As shown, the drawer 1 is provided with at least one placement slot 101 for holding consumables 2. The length extension direction of the placement slot 101 is the same as the length extension direction of the drawer 1. At least one of the two sides of the drawer 1 in the width direction is provided with a fixing mechanism 3.

[0048] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 10 As shown, at least one side of the drawer 1 in the width direction is provided with a moving groove 102 for accommodating the fixing mechanism 3. The length extension direction of the moving groove 102 is consistent with that of the placement groove 101. At least two upwardly protruding partitions 105 are provided at the top of the moving groove 102 (on the side near the top of the placement groove 101). The gap between two adjacent partitions 105 forms a pressing groove 103 for locking the fixing mechanism 3.

[0049] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 10 As shown, the fixing mechanism 3 includes a movable bar 302 that can move along the movable groove 102. That is, the movable bar 302 is movably disposed in the movable groove 102 and can reciprocate relative to the length direction of the movable groove 102.

[0050] The top of the moving bar 302 is provided with at least one upward protruding pressure plate 303 for locking and fixing the consumable 2. The pressure plate 303 can be moved along with the moving bar 302 and is sleeved in the pressure plate groove 103. The pressure plate groove 103 includes a pressure plate locking position and a pressure plate unlocking position.

[0051] Multiple pressure plates 303 protrude from one side of the moving bar 302 near the top of the mounting groove 101. The pressure plates 303 are located in the pressure plate groove 103 and can move back and forth in the pressure plate groove 103 as the moving bar 302 moves. In the initial state, the tablet 303 is located in the tablet locking position on one side of the tablet slot 103, while the tablet unlocking position on the other side of the tablet slot 103 is empty. When the consumable 2 needs to be placed into the placement slot 101, the moving bar 302 is moved away from the placement slot 101, and the tablet 303 reaches the tablet unlocking position of the tablet slot 103. After the consumable 2 is placed into the placement slot 101, the moving bar 302 is moved towards the placement slot 101, and the tablet 303 reaches the tablet locking position of the tablet slot 103, locking the consumable 2 and restricting the vertical freedom of the consumable 2. This can prevent the consumable 2 from changing position and affecting the nucleic acid extraction effect when the nucleic acid extractor performs nucleic acid extraction operations on various reagents in the consumable 2.

[0052] There are many examples of fixing mechanism 3. Any mechanism that can restrict the vertical degree of freedom of consumable 2 is within the scope of protection of this application.

[0053] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 10 As shown, multiple limiting members 104 are spaced apart in the moving groove 102 along the length extension direction of the drawer 1. The limiting members 104 can be limiting pins that can be threaded onto the drawer 1. Multiple limiting grooves 304 that are adapted to the limiting members 104 are provided on the moving bar 302. The dimension of the limiting groove 304 along the length extension direction of the drawer 1 is larger than the dimension of the limiting member 104 along the length extension direction of the drawer 1. The limiting member 104 and the limiting groove 304 cooperate to restrict the moving path of the moving bar 302.

[0054] When the moving bar 302 is installed in the moving groove 102, the limiting member 104 is just locked in the limiting groove 304. The limiting groove 304 and the limiting member 104 can be used to limit the movement path of the moving bar 302.

[0055] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 10 As shown, the fixing mechanism 3 also includes a push button 301 movably connected to the drawer 1. The push button 301 is fixedly connected to the moving bar 302. By driving the push button 301, the moving bar 302 is driven to reciprocate within the moving groove 102.

[0056] Furthermore, such as Figure 4 As shown, a push button receiving groove is provided on the drawer 1, and a positioning pin 5 is provided in the push button receiving groove along the length extension direction of the drawer 1. The push button 301 is movably sleeved on the positioning pin 5. A spring 4 is sleeved on the positioning pin 5, and the two ends of the spring 4 are respectively abutted and connected to the push button 301 and the drawer 1.

[0057] The push button 301 can slide along the positioning pin 5. The spring 4 is sleeved on the positioning pin 5, with one end fixedly connected to the drawer 1 and the other end connected to the push button 301. When the push button 301 moves away from the placement slot 101, the spring 4 is compressed. When the force applied to the push button 301 is released, the spring 4 returns to its elastic deformation, causing the push button 301 to move back to its initial position (that is, move towards the placement slot 101).

[0058] Furthermore, such as Figure 3 , Figure 10 As shown, the top surface of the push button 301 is a flat or arched surface. The top surface of the push button is provided with concave and convex teeth to increase the coefficient of friction, so that the user can easily apply force when the push button 301 is manually pushed.

[0059] Furthermore, the placement slot 101 is configured as a multi-hole slot or a single-hole slot.

[0060] Furthermore, such as Figure 10 As shown, the drawer 1 is provided with a sample hole 106 for receiving sample tubes (test tubes containing samples to be tested). A pressing member 107 is provided inside the sample hole 106, capable of deforming radially along the sample hole 106 to compress the sample tube. The pressing member 107 can be a spring or a top ball. When the sample tube is placed in the sample hole 106, after the sample tube contacts the pressing member 107, the pressing member 107 is compressed, thus making tight contact with and fixing the sample tube. Because the pressing member 107 has a deformation range, the sample hole 106 can accommodate more types of sample tubes.

[0061] Furthermore, such as Figure 1 , Figure 2 As shown, the drawer 1 can be fixedly connected to the base 6. The base 6 is provided with a fixing groove, and the two sides of the fixing groove are provided with locking parts that can lock the drawer 1 in place. The base 6 can usually install and fix multiple drawers 1.

[0062] Example 1

[0063] like Figure 3 As shown, this utility model provides a fixing device for nucleic acid extraction consumables, including a drawer 1 for placing consumables 2. The drawer 1 is provided with at least one placement groove 101 for holding consumables 2. The length extension direction of the placement groove 101 is the same as the length extension direction of the drawer 1. The placement groove 101 is in the shape of a porous groove. Both sides of the drawer 1 in the width direction are provided with movable grooves 102 for accommodating fixing mechanisms 3. The length extension direction of the movable groove 102 is consistent with that of the placement groove 101. Multiple partitions 105 protrude on the side of the movable groove 102 near the top of the placement groove 101. Adjacent partitions 105 are spaced apart to form a tablet pressing groove 103. Multiple limiting members 104 are provided in the movable groove 102.

[0064] The fixing mechanism 3 includes a push button 301 and a moving bar 302. The push button 301 is movably connected to the drawer 1, and the moving bar 302 is movably disposed within the moving groove 102 and can reciprocate relative to the length direction of the moving groove 102. The push button 301 is connected to the moving bar 302, and driving the push button 301 (manually or electrically) can drive the moving bar 302 to reciprocate within the moving groove 102. The moving bar 302 is provided with multiple limiting grooves 304 that are adapted to the limiting member 104. When the moving bar 302 is installed in the moving groove 102, the limiting member 104 is just engaged in the limiting groove 304. The limiting groove 304 and the limiting member 104 cooperate to limit the movement path of the moving bar 302. Multiple pressure plates 303 protrude from one side of the moving bar 302 near the top of the mounting groove 101. The pressure plates 303 are located in the pressure plate groove 103 and can move back and forth in the pressure plate groove 103 as the moving bar 302 moves.

[0065] like Figure 4As shown, a push button receiving groove is provided on the drawer 1, and a positioning pin 5 is provided in the push button receiving groove along the length extension direction of the drawer 1. The push button 301 is movably sleeved on the positioning pin 5. A spring 4 is sleeved on the positioning pin 5, and the two ends of the spring 4 are respectively abutted and connected to the push button 301 and the drawer 1.

[0066] like Figure 3 , Figure 4 As shown, the push button 301 is rectangular in shape with a horizontally extended surface, and the upper surface of the push button 301 is concave and convex.

[0067] Figure 5 A three-dimensional schematic diagram of consumable 2 is shown. Consumable 2 includes a consumable plate 201 and a notch 202 formed on the consumable plate 201 to fit the tablet 303.

[0068] Taking this embodiment as an example, the working principle of the fixation device for nucleic acid extraction consumables of this utility model is as follows:

[0069] like Figure 6 As shown, the consumable 2 is not placed in the placement slot 101 of the drawer 1, and the fixing mechanism 3 is in the initial state. In the initial state, the tablet 303 is located in the tablet locking position on one side of the tablet slot 103, and the tablet unlocking position on the other side of the tablet slot 103 is in an empty state; the limiting member 104 is located on one side of the limiting slot 304, and the other side of the limiting slot 304 is in an empty state.

[0070] When consumable 2 needs to be placed in the placement slot 101, force is applied manually or automatically to the push button 301, compressing the spring 4. The moving bar 302 moves within the moving slot 102 under the action of the push button 301, while the tablet 303 moves towards the other side of the tablet slot 103, reaching the tablet unlocking position. The limiting slot 304 moves towards the limiting member 104 until the moving bar 302 can no longer move forward, as shown below. Figure 7 The state shown;

[0071] Place the consumable 2 into the slot 101 of the drawer 1. The consumable 2 has a notch 202 that matches the tablet 303. At this time, the notch 202 is just around the tablet 303 in the tablet unlocked position. Figure 8 As shown in the diagram; the force applied to the push button 301 is released, and the push button 301 returns to its initial state under the elastic restoring force of the spring 4, which also drives the moving bar 302 to return to its initial state. After returning to its initial state, the pressure plate 303 presses onto the consumable plate 201 of the consumable 2, thereby limiting the degree of freedom of the consumable 2 in the vertical direction, as shown in the diagram. Figure 9 As shown.

[0072] Example 2

[0073] The overall structure of Example 2 is similar to that of Example 1, with three differences. First, the structure of the push button 301 is different; second, the structure of the placement slot 101 is different; and third, a sample tube adapter structure is added.

[0074] like Figure 10 The diagram shown illustrates Embodiment 2 of the fixation device for nucleic acid extraction consumables.

[0075] like Figure 10 As shown, the push button 301 is in the shape of a triangular pyramid (i.e., a triangular arch), and the surface has a zigzag extension. The push button 301 is easy to push, and the push button 301 can also be any other shape.

[0076] like Figure 10 As shown, the placement slot 101 is a single-hole slot, which can accommodate more types of consumables 2.

[0077] like Figure 10 As shown, the drawer 1 is provided with a sample hole 106 for receiving sample tubes (test tubes containing samples to be tested). A pressing member 107 is provided inside the sample hole 106, capable of deforming radially along the sample hole 106 to compress the sample tube. The pressing member 107 can be a spring or a top ball. When the sample tube is placed in the sample hole 106, after the sample tube contacts the pressing member 107, the pressing member 107 is compressed, thus making tight contact with and fixing the sample tube. Because the pressing member 107 has a deformation range, the sample hole 106 can accommodate more types of sample tubes.

[0078] As described above, the fixation device for nucleic acid extraction consumables of this utility model has the following beneficial effects:

[0079] This invention features a fixing mechanism installed on the drawer. When the consumables are placed on the drawer, the fixing mechanism can easily and quickly lock and fix the consumables on the drawer, restricting the vertical freedom of the consumables. This prevents the consumables from changing position and affecting the nucleic acid extraction effect when the nucleic acid extractor performs nucleic acid extraction operations on various reagents in the consumables.

[0080] This invention allows for convenient and quick placement of consumables in a fixed position within the nucleic acid extractor, ensuring that the consumables remain in the same position throughout the entire nucleic acid extraction process. This improves the effectiveness of nucleic acid extraction, allowing the sample to be fully extracted and released more completely.

[0081] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A fixing device of a nucleic acid extraction consumable, characterized by, Includes a drawer for holding consumables, the drawer being provided with a fixing mechanism for fixing the consumables to the drawer to restrict the degree of freedom of the consumables in the vertical direction; The drawer is provided with at least one placement slot for holding the consumables. The length extension direction of the placement slot is the same as the length extension direction of the drawer. The fixing mechanism is provided on at least one side of the drawer in the width direction.

2. The device for fixing nucleic acid extraction consumables according to claim 1, wherein At least one side of the drawer in the width direction is provided with a movable groove for accommodating the fixing mechanism. The top of the movable groove is provided with at least two upwardly protruding partitions that are spaced apart along the length direction of the drawer. The gap between two adjacent partitions forms a pressing groove for the fixing mechanism to be engaged.

3. The device for fixing nucleic acid extraction consumables according to claim 2, wherein The fixing mechanism includes a movable bar that can move along the movable groove. At least one pressure plate protruding upwards and used to lock and fix the consumable is provided at the top of the movable bar. The pressure plate is movably fitted into the pressure plate groove with the movable bar. The pressure plate groove includes a pressure plate locking position and a pressure plate unlocking position.

4. The device for fixing nucleic acid extraction consumables according to claim 3, wherein Multiple limiting members are spaced apart in the moving groove along the length extension direction of the drawer. Multiple limiting grooves adapted to the limiting members are provided on the moving strip. The dimension of the limiting groove along the length extension direction of the drawer is larger than the dimension of the limiting member along the length extension direction of the drawer. The limiting member cooperates with the limiting groove to restrict the moving path of the moving strip.

5. The device for fixing nucleic acid extraction consumables according to claim 3, wherein The fixing mechanism also includes a push button movably connected to the drawer, the push button being fixedly connected to the moving bar, and the moving bar being driven to reciprocate within the moving groove by driving the push button.

6. The device for fixing nucleic acid extraction consumables according to claim 5, wherein The drawer is provided with a push button receiving groove, and a positioning pin is provided in the push button receiving groove along the length extension direction of the drawer. The push button is movably sleeved on the positioning pin. A spring is sleeved on the positioning pin, and the two ends of the spring are respectively abutted and connected to the push button and the drawer.

7. The device for fixing nucleic acid extraction consumables according to claim 5, wherein The top surface of the push button is either flat or arched, and the top surface of the push button is provided with concave and convex teeth to increase the coefficient of friction.

8. The device for fixing nucleic acid extraction consumables according to claim 1, wherein The placement slot is configured as a multi-hole slot or a single-hole slot.

9. The device for fixing nucleic acid extraction consumables according to claim 1, wherein, The drawer is provided with a sample hole for receiving sample tubes, and a pressing member is provided in the sample hole to compress the sample tubes by deforming radially along the sample hole.

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