Error-proof sample adding device for molecular biology

Abstract

The invention relates to the technical field of experimental instruments, in particular to a mistake-proof sample adding device for molecular biology, which comprises a base, test tubes and a controller, and the base is provided with an identification assembly for distinguishing and identifying the test tubes and a centrifugation assembly for centrifuging the test tubes. The recognition assembly comprises a first support rotationally matched with the top of the base. The top of the first support is fixedly connected with a rotating plate. A placing groove for placing a test tube is formed in the rotating plate in the circumferential direction; the top of the rotating plate is detachably connected with a plurality of magnet blocks with different sizes; the top of the base is further fixedly connected with a second support, the side wall of the second support is fixedly connected with a magnetic powder box, and the magnetic powder box is filled with magnetic powder used for forming different shapes according to different electromagnetic forces. The device is complete in structure and complete in function, different test tubes can be distinguished, and the experiment accuracy is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of experimental instruments, and in particular to an error-proof sample addition device for molecular biology. Background Art

[0002] In molecular biology experiments, sample addition is an important part of the experimental process. However, due to the large number of samples required for the experiment, the test tubes may become messy, which makes it easy for the experimenter to make mistakes when adding reagents. Such mistakes not only waste experimental materials and time, but also may reduce the progress and accuracy of the experiment. Therefore, a device that can prevent incorrect sample addition is particularly important.

[0003] In traditional technology, test tubes are usually placed randomly in experiments, lacking orderly classification and storage methods, which increases the risk of errors made by experimenters when adding samples. In existing error-proofing sample addition technologies, test tubes are often marked by attaching labels or printing numbers on them to distinguish different test tubes. However, in this way, if the labels on the test tubes fall off or the numbers on the test tubes are worn during repeated use of the test tubes, the test tubes cannot be distinguished, which can easily lead to incorrect sample addition and affect the results of molecular biology experiments.

[0004] In summary, how to solve the problem that it is difficult to accurately and effectively mark the test tubes in the existing error-proofing technology, which easily leads to error-proofing, and thus affects the effect of molecular biology experiments, has become a difficult problem that needs to be solved in this field. Therefore, it is necessary to propose an accurate error-proofing device for molecular biology. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an anti-error sample addition device for molecular biology. Through the design of the identification component, it can effectively prevent the test tubes from being placed in the wrong position due to long-term use, the labels on the test tubes falling off, or the numbers on the test tubes being worn, which makes it impossible to distinguish and identify the test tubes, thereby reducing the risk of incorrect sample addition and effectively improving the accuracy of the experiment.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: A device for preventing wrong sample addition for molecular biology comprises a base and a test tube, wherein the base is provided with an identification component for distinguishing and identifying the test tube and a centrifugal component for centrifuging the test tube.

[0007] The identification component includes a first bracket rotatably engaged with the top of the base, and a rotating plate is fixedly connected to the top of the first bracket; a placement groove for placing test tubes is opened circumferentially on the rotating plate; a plurality of magnet blocks of different sizes are detachably connected to the top of the rotating plate; a second bracket is also fixedly connected to the top of the base, and a magnetic powder box is fixedly connected to the side wall of the second bracket, and the magnetic powder box is filled with magnetic powder for forming different shapes according to different electromagnetic forces; the magnetic powder box is made of transparent material.

[0008] Guide blocks are symmetrically provided on both sides of the magnet block, and the guide blocks are fixedly connected to the top of the rotating plate; the side wall of the rotating plate is rotatably matched with a C-shaped rotating frame; the rotating plate is provided with a number of arc grooves that are rotatably matched with the rotating frame; a support rod is provided on the rotating frame, and both ends of the support rod are fixedly connected to the inner side wall of the rotating frame adjacent to it; a center rod is fixedly connected to the top of the support rod; a connecting rod is fixedly connected to the center rod, and the end of the connecting rod away from the center rod is rotatably matched with the rotating rod; a first gear is coaxially fixedly connected to the top of the rotating rod, and a guide rod is eccentrically fixedly connected to the bottom of the rotating rod; the gaps between adjacent guide blocks constitute guide grooves for the guide rods to slide; a third bracket is also fixedly connected to the top of the base, and a gear ring is fixedly connected to the side wall of the third bracket, and the gear ring is meshed with the first gear; the horizontal height of the gear ring is higher than the horizontal height of the guide block; a driving assembly for driving the center rod to move and a supporting assembly for providing support for the center rod are provided at the top of the center rod.

[0009] The technical principles of the above scheme are as follows:

[0010] Different test tubes are placed in different placement slots, and the center rod is driven to rotate by the driving component; the rotation of the center rod will drive the connecting rod to rotate, and the connecting rod will drive the rotating rod to rotate around the center rod; then the first gear is driven to roll along the gear ring; then the rotating rod is driven to rotate, and then the guide rod is deflected around the rotating rod; the center rod will also drive the rotating frame to rotate along the arc groove adjacent to it, and whenever the notch position of the rotating frame is aligned with the arc groove adjacent to it, the guide rod will be rotated into the guide groove adjacent to it, thereby driving the rotating plate to rotate, and then driving the test tube and the magnet block to rotate; different magnet blocks are rotated to the bottom of the magnetic powder box, and then the magnetic powder in the magnetic powder box forms different shapes, and the experimenter can distinguish each test tube according to the different shapes formed by the magnetic powder; after the test tubes are distinguished, the sample can be added, and after the sample is added, the centrifugal operation can be started through the centrifugal component.

[0011] The above scheme has the following beneficial effects:

[0012] 1. In the existing error-proofing technology, test tubes are marked by affixing labels or printing numbers on the test tubes to distinguish different test tubes. However, during long-term use, the labels are likely to fall off or be etched and worn, which will make it impossible to distinguish the test tubes, easily causing incorrect sample addition, thereby affecting the effect of molecular biology experiments. Compared with the existing technology, the magnetic attraction generated by the magnet block is stable and lasting, so that the device's ability to distinguish test tubes is also more stable and lasting, and there will be no situation where the test tubes cannot be distinguished due to long-term use. Moreover, through the design of the placement slot, during the experiment, the experimenter does not need to repeatedly pick up and put the test tubes to identify the test tubes, which reduces the manpower consumption of the experimenter, and also avoids the influence of human factors such as test tubes falling, material spilling or sundries mixing due to repeated picking and putting, thereby improving the experimental effect.

[0013] 2. The present invention, through the design of the magnetic powder box and the magnet block, utilizes the differences in magnetic field size, direction and angle generated by magnet blocks of different sizes to generate different magnetic attraction forces, so that the magnetic powder in the magnetic powder box forms different three-dimensional shapes, which makes it easy for experimenters to quickly distinguish different test tubes. The operation is simple. It only requires utilizing the adsorption force of the magnet block itself to adsorb magnet blocks of different sizes next to each placement slot, and then placing different test tubes into the placement slot, so that each test tube can be quickly identified and distinguished.

[0014] 3. The present invention enables the guide rod to rotate periodically through the design of the rotating rod, and then through the design of evenly distributed guide grooves, the guide rod will drive the rotating plate to rotate at a certain interval, thereby effectively extending the effect of each magnet block on the magnetic powder, so that the magnetic powder can better form a complete and stable shape, and also provide a longer observation time for the camera, thereby improving the accuracy of test tube differentiation and identification.

[0015] 4. The arc-shaped structural design of the arc groove and the C-shaped structural design of the rotating frame ensure that the two will not hinder each other during rotation, and at the same time, the guide rod can rotate at the notch position of the C-shaped rotating frame, thereby realizing the intermittent rotation function of the rotating plate; at the same time, the arc-shaped structural design of the arc groove makes the rotation of the rotating plate smoother, and the C-shaped structural design of the rotating frame enables the protruding part of the rotating plate to pass through the rotating frame smoothly, and can better distinguish the rotation of the rotating frame. When the rotating frame rotates one circle, the magnet block under the magnetic powder box is replaced to the next group, making the rotation rhythm of the test tube more regular and the test tube easier to distinguish and identify.

[0016] Furthermore, the centrifugal assembly includes a controller and a second gear fixedly mounted on the outer wall of the first bracket; a first telescopic rod is fixedly connected to the base, a first driving member is fixedly connected to the output shaft of the first telescopic rod, a third gear is coaxially fixedly connected to the output shaft of the first driving member, and the second gear is meshed with the third gear; the controller is used to control the extension and retraction of the first telescopic rod and the start and stop of the first driving member.

[0017] Beneficial effect: When centrifugal operation is required, the output distance of the first telescopic rod is controlled by the controller so that the second gear and the third gear remain engaged, and the first driving member is controlled to operate at the same time. The output shaft of the first driving member drives the third gear to rotate, so that the third gear drives the second gear to rotate. Since the rotating rod and the base rotate in coordination, the second gear will drive the rotating rod to rotate, and then drive the test tube in the placement slot to rotate, thereby realizing centrifugation of the substance in the test tube.

[0018] Furthermore, the driving assembly includes a second telescopic rod; the second telescopic rod output shaft is fixedly connected to a second driving member, and the second driving member output shaft is coaxially fixedly connected to the center rod; the controller is used to control the extension and retraction of the second telescopic rod and the start and stop of the second driving member.

[0019] Beneficial effect: When test tube identification and differentiation is required, the controller controls the output distance of the second telescopic rod, so that the first gear is engaged with the gear ring and the rotating frame is fitted with the arc groove; then the second driving member is started, and the output shaft of the second driving member drives the center rod to rotate, thereby realizing intermittent rotation of the rotating plate, and then realizing the identification and differentiation of different test tubes.

[0020] Furthermore, the support assembly includes a top plate; a side wall of the top plate is fixedly connected to a side wall of the third bracket; and a second telescopic rod is fixedly connected to the bottom of the top plate.

[0021] Beneficial effect: The top plate can provide stable support for the second telescopic rod, thereby enabling the second driving member and the central rod to operate stably.

[0022] Furthermore, a plurality of fixing rods are fixedly connected to the bottom of the top plate, and ends of the fixing rods away from the top plate are fixedly connected to the top of the gear ring.

[0023] Beneficial effect: The fixing rod can provide stable support for the gear ring, so that the gear ring can better mesh with the first gear, thereby improving the overall operating stability of the device.

[0024] Furthermore, the guide blocks are all trapezoidal.

[0025] Beneficial effects: The trapezoidal structural design of the guide block can reduce the volume of the guide block, reduce the materials required for its production, and thus reduce the production cost; at the same time, it also reduces the shielding of other components by the guide block during rotation, allowing the rotating plate to rotate better.

[0026] Furthermore, a camera is fixedly connected to the top of the first gear, and the controller is used to control the opening and closing of the camera.

[0027] Beneficial effects: The camera can capture the image of the magnetic powder, and the controller transmits the image of the magnetic powder to the experimenter's mobile phone, which makes it easy for the experimenter to distinguish each test tube; at the same time, by utilizing the revolution and rotation of the first gear, the camera can realize the revolution and rotation, thereby more comprehensively collecting images of the entire experimental process.

[0028] Furthermore, a display is embedded on the top of the top plate, and a controller is used to control the opening and closing of the display.

[0029] Beneficial effect: The controller transmits the image of the magnetic powder and the image of the experimental process to the display in real time for display, which is convenient for the experimenter to understand and analyze the experimental process.

[0030] Furthermore, a lighting lamp is fixedly connected inside the magnetic powder box, and the controller is used to control the on and off of the lighting lamp.

[0031] Beneficial effect: The lighting lamp can illuminate the magnetic powder box and optimize the lighting conditions in the magnetic powder box, so that the operator can more clearly observe the shape of the magnetic powder and better distinguish the magnetic powder.

[0032] Furthermore, the rotating plate is made of metal material.

[0033] Beneficial effects: The rotating plate made of metal can better absorb the magnet block, which is convenient for installation and removal of the magnet block, making the work of distinguishing test tubes easier.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is an axonometric diagram of the error-proof sample adding device for molecular biology of the present invention.

[0036] Figure 2 It is a side view of the error-proof sample adding device for molecular biology of the present invention.

[0037] Figure 3 It is a side view of the rotating rod in the error-proofing sample adding device for molecular biology of the present invention.

[0038] The figure marks in the drawings of the specification include: 1. base; 2. first bracket; 3. rotating plate; 4. magnet block; 5. second bracket; 6. magnetic powder box; 7. guide block; 8. rotating frame; 9. center rod; 10. connecting rod; 11. first gear; 12. gear ring; 13. third bracket; 14. rotating rod; 15. guide rod; 16. first telescopic rod; 17. first motor; 18. third gear; 19. second gear; 20. fixed rod; 21. top plate; 22. second telescopic rod; 23. second motor; 24. camera. DETAILED DESCRIPTION

[0039] The following is further described in detail through specific implementation methods:

[0040] Embodiment 1:

[0041] like Figure 1-Figure 3 As shown, a device for preventing wrong sample addition for molecular biology comprises a base 1, a test tube (not shown in the figure) and a controller. The base 1 is provided with an identification component for distinguishing and identifying the test tube and a centrifugal component for centrifuging the test tube.

[0042] The identification component includes a first bracket 2 that is rotatably matched with the top of the base 1, and a rotating plate 3 is fixedly connected to the top of the first bracket 2 with bolts; the rotating plate 3 is made of metal material. A placement slot for placing test tubes is opened on the rotating plate 3 in the circumferential direction; a plurality of magnet blocks 4 of different sizes are magnetically adsorbed on the top of the rotating plate 3; a second bracket 5 is also fixedly connected to the top of the base 1 with bolts, and a magnetic powder box 6 is fixedly connected to the side wall of the second bracket 5 with bolts, and the magnetic powder box 6 is filled with magnetic powder for forming different shapes according to different electromagnetic forces; the magnetic powder box 6 is made of transparent material.

[0043] Guide blocks 7 are symmetrically arranged on both sides of the magnet block 4, and the guide blocks 7 are fixedly connected with the top of the rotating plate 3 by bolts; the side wall of the rotating plate 3 is rotatably matched with a C-shaped rotating frame 8; the rotating plate 3 is provided with a plurality of arc grooves rotatably matched with the rotating frame 8; the rotating frame 8 is provided with a support rod, and both ends of the support rod are welded to the inner wall of the rotating frame 8 adjacent to it; the top of the support rod is fixedly connected with a center rod 9 by bolts; the center rod 9 is fixedly connected with a connecting rod 10 by bolts, and the end of the connecting rod 10 away from the center rod 9 is rotatably matched with a rotating rod 14; the top of the rotating rod 14 is fixedly connected with a first gear 11 by coaxial bolts, and the bottom of the rotating rod 14 is fixedly connected with a guide rod 15 by eccentric bolts; the gaps between adjacent guide blocks 7 form guide grooves for the guide rods 15 to slide; the top of the base 1 is also fixedly connected with a third bracket 13 by bolts, and the side wall of the third bracket 13 is fixedly connected with a toothed ring 12, and the toothed ring 12 is meshed with the first gear 11. The horizontal height of the toothed ring 12 is higher than the horizontal height of the guide block 7 to avoid mutual obstruction between the toothed ring 12 and the guide block 7.

[0044] The top of the first gear 11 is bolted with a camera 24, and the controller is used to control the opening and closing of the camera 24. The revolution and rotation of the first gear 11 enable the camera 24 to realize the revolution and rotation, thereby being able to more comprehensively collect images of the entire experimental process and the images of the magnetic powder.

[0045] A driving assembly for driving the center rod 9 to move and a supporting assembly for providing support for the center rod 9 are provided on the top of the center rod 9 .

[0046] The centrifugal assembly includes a second gear 19 boltedly mounted on the outer wall of the first bracket 2; a first telescopic rod 16 is boltedly fixedly connected to the base 1, a first driving member is boltedly fixedly connected to the output shaft of the first telescopic rod 16, a third gear 18 is coaxially boltedly fixedly connected to the output shaft of the first driving member, and the second gear 19 is meshed with the third gear 18; a controller is used to control the extension and retraction of the first telescopic rod 16 and the start and stop of the first driving member.

[0047] The driving assembly includes a second telescopic rod 22; the output shaft of the second telescopic rod 22 is bolted and fixedly connected with a second driving member, and the output shaft of the second driving member is coaxially bolted and fixedly connected with the center rod 9; the controller is used to control the extension and retraction of the second telescopic rod 22 and the start and stop of the second driving member.

[0048] The support assembly includes a top plate 21; the side wall of the top plate 21 is welded to the side wall of the third bracket 13; and the second telescopic rod 22 is bolted and fixedly connected to the bottom of the top plate 21. A display is embedded and installed on the top of the top plate 21, and the controller is used to control the opening and closing of the display. The controller transmits the image of the magnetic powder and the image of the experimental process to the display in real time for display, which is convenient for the experimenter to understand and analyze the experimental process.

[0049] In this embodiment, the first driving member and the second driving member are both servo motors, and are named as the first motor 17 and the second motor 23 respectively.

[0050] The specific implementation process is as follows:

[0051] In the initial state, the second telescopic rod 22 is in an extended state, the first gear 11 is meshed with the gear ring 12, and the rotating frame 8 is in contact with the arc groove; the first telescopic rod 16 is in a retracted state, and the second gear 19 is separated from the third gear 18.

[0052] by Figure 1For example, when distinguishing test tubes, the operator places different test tubes in different placement slots, and controls the second motor 23 to start through the controller. The output shaft of the second motor 23 drives the center rod 9 to rotate, and the center rod 9 drives the connecting rod 10 to rotate, and the connecting rod 10 drives the rotating rod 14 and the first gear 11 to revolve around the center rod 9; since the first gear 11 is fixedly connected to the rotating rod 14 with bolts, and the rotating rod 14 and the connecting rod 10 rotate in coordination, the rotating rod 14 drives the first gear 11 to rotate along the gear ring 12; the first gear 11 drives the rotating rod 14 to rotate, and since the guide rod 15 is fixedly connected to the rotating rod 14 with an eccentric bolt, the guide rod 15 deflects around the rotating rod 14.

[0053] At the same time, the center rod 9 will also drive the rotating frame 8 to rotate along the arc groove adjacent to it. Since the guide rod 15 slides with the guide groove, the guide rod 15 rotates in the notch position of the rotating frame 8. Whenever the notch position of the rotating frame 8 is aligned with the arc groove adjacent to it, the guide rod 15 will be rotated into the guide groove adjacent to it. Due to the limiting effect of the guide groove, the guide rod 15 will drive the rotating plate 3 to rotate, and then drive the test tube and the magnet block 4 to rotate; the magnet blocks 4 at different positions are rotated to the bottom of the magnetic powder box 6, so that the magnetic powder in the magnetic powder box 6 forms different shapes, and the camera 24 will capture the image of the magnetic powder, and the experimenter can distinguish each test tube according to the different shapes formed by the magnetic powder.

[0054] During this process, since the guide grooves are evenly distributed on the top of the rotating plate 3, the guide rod 15 will enter the guide groove at a certain interval, thereby driving the rotating plate 3 to rotate once, thereby effectively extending the effect of each magnet block 4 on the magnetic powder, so that the magnetic powder can better form a complete and stable shape, and also provide the camera 24 with a longer observation time, thereby improving the accuracy of test tube differentiation and identification.

[0055] The arc-shaped structural design of the arc groove and the unique C-shaped structural design of the rotating frame 8 ensure that the two will not hinder each other during rotation, and at the same time enable the guide rod 15 to rotate at the notch position of the rotating frame 8, thereby enabling the intermittent rotation function of the rotating plate 3 to be realized; at the same time, the arc-shaped structural design of the arc groove enables the rotation of the rotating plate 3 to be smoother, and the unique C-shaped structural design of the rotating frame 8 enables the protruding part of the rotating plate 3 to pass through the rotating frame 8 smoothly, and can better distinguish the rotation status of the rotating frame 8. When the rotating frame 8 rotates one circle, the magnet block 4 under the magnetic powder box 6 is replaced to the next group, so that the rotation rhythm of the test tube is more regular, and the test tube is easier to distinguish and identify.

[0056] After the test tubes are differentiated, you can start adding samples, and after adding samples, you can start centrifugation.

[0057] like Figure 1As shown, when centrifugal operation is required, the experimenter controls the extension of the first telescopic rod 16 through the controller, so that the second gear 19 and the third gear 18 remain meshed, and controls the second telescopic rod 22 to contract, so that the first gear 11 is separated from the gear ring 12, and the rotating frame 8 is separated from the arc groove to avoid obstruction; at the same time, the first motor 17 is controlled to run, and the output shaft of the first motor 17 drives the third gear 18 to rotate, so that the third gear 18 drives the second gear 19 to rotate. Since the first bracket 2 and the base 1 rotate in coordination, the second gear 19 will drive the first bracket 2 to rotate, and then drive the test tube in the placement slot to rotate, thereby realizing centrifugation of the substance in the test tube.

[0058] When the centrifugal operation is not required, it is only necessary to keep the first motor 17 stationary and control the first telescopic rod 16 to retract, which will not affect the normal operation of the test tube differentiation.

[0059] In the existing technology for preventing wrong sample addition, the test tubes are marked by affixing labels or printing numbers on the test tubes to distinguish different test tubes. However, during long-term use, the labels are likely to fall off or be etched and worn, which will make it impossible to distinguish the test tubes, easily causing incorrect sample addition, thereby affecting the effect of the molecular biology experiment. Compared with the existing technology, the magnetic attraction generated by the magnet block 4 is stable and lasting, so that the device's ability to distinguish the test tubes is also more stable and lasting, and there will be no situation where the test tubes cannot be distinguished due to long-term use. Moreover, through the design of the placement slot, during the experiment, the experimenter does not need to repeatedly pick up and put the test tubes to identify them, which reduces the manpower consumption of the experimenter, and also avoids the influence of human factors such as the test tube falling, material spilling or debris mixing due to repeated picking and putting, thereby improving the experimental effect.

[0060] Embodiment 2:

[0061] like Figure 1 and Figure 2 As shown, the difference from the above embodiment is that a plurality of fixing rods 20 are bolted and fixedly connected to the bottom of the top plate 21 , and the bottoms of the fixing rods 20 are bolted and fixedly connected to the top of the gear ring 12 .

[0062] The specific implementation process is as follows: the fixing rod 20 can provide stable support for the gear ring 12, so that the gear ring 12 can better mesh with the first gear 11, thereby improving the overall operating stability of the device.

[0063] Embodiment 3:

[0064] like Figure 1 As shown, the difference from the above embodiment is that the guide blocks 7 are all trapezoidal.

[0065] The specific implementation process is as follows: the trapezoidal structural design of the guide block 7 can reduce the volume of the guide block 7, reduce the materials required for its production, and thus reduce the production cost; at the same time, it also reduces the shielding of other components by the guide block 7 during rotation, so that the rotating plate 3 can rotate better.

[0066] Embodiment 4:

[0067] like Figure 1 As shown, the difference from the above embodiment is that a lighting lamp is fixedly bonded inside the magnetic powder box 6, and the controller is used to control the on and off of the lighting lamp.

[0068] The specific implementation process is as follows: the lighting lamp can illuminate the magnetic powder box 6, optimize the lighting conditions in the magnetic powder box 6, and then enable the camera 24 to more clearly observe the shape formed by the magnetic powder, so as to better distinguish the test tubes.

[0069] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A molecular biology error-proofing sample addition device, comprising a base (1) and a test tube, characterized in that: The base (1) is provided with an identification component for distinguishing and identifying the test tubes and a centrifugation component for centrifuging the test tubes; The identification component comprises a first bracket (2) rotatably matched with the top of the base (1); a rotating plate (3) is fixedly connected to the top of the first bracket (2); a plurality of placement slots for placing test tubes are formed on the rotating plate (3); a plurality of magnet blocks (4) of different sizes are detachably connected to the top of the rotating plate (3); A second bracket (5) is also fixedly connected to the top of the base (1); a magnetic powder box (6) is fixedly connected to the side wall of the second bracket (5); the magnetic powder box (6) is filled with magnetic powder for forming different shapes according to different electromagnetic forces; the magnetic powder box (6) is made of transparent material; Guide blocks (7) are symmetrically arranged on both sides of the magnet block (4), and the guide blocks (7) are fixedly connected to the top of the rotating plate (3); a C-shaped rotating frame (8) is rotatably matched with the side wall of the rotating plate (3); an arc-shaped groove is circumferentially opened on the rotating plate (3) and is rotatably matched with the rotating frame (8); A support rod is provided on the rotating frame (8), and both ends of the support rod are fixedly connected to the inner wall of the rotating frame (8) adjacent thereto; a center rod (9) is fixedly connected to the top of the support rod; a connecting rod (10) is fixedly connected to the center rod (9), and an end of the connecting rod (10) away from the center rod (9) is rotatably matched with a rotating rod (14); a first gear (11) is coaxially fixedly connected to the top of the rotating rod (14), and a guide rod (15) is eccentrically fixedly connected to the bottom of the rotating rod (14); The gaps between adjacent guide blocks (7) all form guide grooves for the guide rod (15) to slide; a third bracket (13) is also fixedly connected to the top of the base (1); a toothed ring (12) is fixedly connected to the side wall of the third bracket (13); the toothed ring (12) and the first gear (11) are meshed with each other; the horizontal height of the toothed ring (12) is higher than the horizontal height of the guide block (7); A driving assembly for driving the center rod (9) to move and a supporting assembly for providing support for the center rod (9) are provided at the top of the center rod (9).

2. The error-proof sample addition device for molecular biology according to claim 1, characterized in that The centrifugal assembly comprises a controller and a second gear (19) fixedly mounted on the outer wall of the first bracket (2); a first telescopic rod (16) is fixedly connected to the base (1); an output shaft of the first telescopic rod (16) is fixedly connected to a first driving member; the output shaft of the first driving member is coaxially fixedly connected to a third gear (18); the second gear (19) is meshed with the third gear (18); The controller is used to control the extension and retraction of the first telescopic rod (16) and the start and stop of the first driving member.

3. The error-proofing sample adding device for molecular biology according to claim 2, characterized in that: The driving assembly comprises a second telescopic rod (22); the output shaft of the second telescopic rod (22) is fixedly connected to a second driving member, and the output shaft of the second driving member is coaxially fixedly connected to the central rod (9); The controller is used to control the extension and retraction of the second telescopic rod (22) and the start and stop of the second driving member.

4. The error-proof sample addition device for molecular biology according to claim 3, characterized in that: The support assembly comprises a top plate (21); a side wall of the top plate (21) is fixedly connected to a side wall of a third bracket (13); and a second telescopic rod (22) is fixedly connected to the bottom of the top plate (21).

5. The error-proof sample addition device for molecular biology according to claim 4, characterized in that: A plurality of fixing rods (20) are also fixedly connected to the bottom of the top plate (21), and one end of the fixing rods (20) away from the top plate (21) is fixedly connected to the top of the gear ring (12).

6. The error-proof sample addition device for molecular biology according to claim 5, characterized in that: The guide blocks (7) are all trapezoidal.

7. The error-proof sample addition device for molecular biology according to claim 6, characterized in that: A camera (24) is fixedly connected to the top of the first gear (11), and the controller is used to control the opening and closing of the camera (24).

8. The error-proof sample addition device for molecular biology according to claim 7, characterized in that: A display is embedded and installed on the top of the top plate (21), and the controller is used to control the opening and closing of the display.

9. The error-proof sample addition device for molecular biology according to claim 8, characterized in that: A lighting lamp is fixedly connected inside the magnetic powder box (6), and the controller is used to control the on and off of the lighting lamp.

10. The error-proof sample addition device for molecular biology according to claim 9, characterized in that: The rotating plate (3) is made of metal material.

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