An anti-misloading device for molecular biology

Abstract

The present invention relates to the technical field of experimental instruments, and particularly relates to an anti-misloading device for molecular biology, which includes a base, test tubes and a controller. An identification component for distinguishing and identifying test tubes and a centrifugation component for centrifuging test tubes are provided on the base. The identification component includes a first bracket rotatably fitted to 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 circumferentially formed on the rotating plate; a number 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. The magnetic powder box is filled with magnetic powder for forming different shapes according to different electromagnetic forces; the structure of the present invention is complete and the function is perfect, which can distinguish different test tubes and effectively improve the accuracy of the experiment.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental instruments, and particularly to an anti-misloading device for molecular biology. Background Art

[0002] In molecular biology experiments, the loading operation is an important part of the experimental process. However, due to the large number of samples required in the experiment, the placement of test tubes may become messy, resulting in errors when experimenters add reagents. Such errors not only waste experimental materials and time, but also may reduce the progress and accuracy of the experiment. Therefore, a device that can prevent misloading is particularly important.

[0003] In traditional technologies, since test tubes are usually placed randomly in experiments and lack an orderly classification and storage method, the risk of errors when experimenters add samples is increased. In existing anti-misloading technologies, test tubes are often marked by pasting labels or printing numbers on the test tubes to distinguish different test tubes. However, in the process of repeated use of test tubes, if the labels on the test tubes fall off or the numbers on the test tubes are worn, the test tubes cannot be distinguished, which is extremely likely to cause misloading, thereby affecting the effect of molecular biology experiments.

[0004] In summary, how to solve the problem that in existing anti-misloading technologies, it is difficult to accurately and effectively mark test tubes, which is extremely likely to cause misloading and thus affect the effect of molecular biology experiments has become a difficult problem that needs to be solved urgently in the current field. Therefore, it is necessary to propose an accurate anti-misloading device for molecular biology. Summary of the Invention

[0005] To solve the above problems, the present invention provides an anti-misloading device for molecular biology. Through the design of the recognition component, it can effectively avoid the situation that test tubes cannot be distinguished and recognized due to the long-term use of test tubes, the wrong placement of test tube positions, the falling off of labels on test tubes, or the wear of numbers on test tubes, thereby reducing the risk of misloading and effectively improving the accuracy of the experiment.

[0006] To achieve the above object, the technical solution of the present invention is as follows: An anti-misloading device for molecular biology, comprising a base and test tubes, and a recognition component for distinguishing and recognizing test tubes and a centrifugation component for centrifuging test tubes are provided on the base.

[0007] The identification component includes a first bracket rotatably fitted to 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 circumferentially formed on the rotating plate; a number 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. 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 a transparent material.

[0008] Guide blocks are symmetrically arranged on both sides of the magnet block, and the guide blocks are fixedly connected to the top of the rotating plate; a C-shaped rotating frame is rotatably fitted to the side wall of the rotating plate; a number of arc-shaped grooves for rotatably fitting with the rotating frame are formed on the rotating plate; 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 central rod is fixedly connected to the top of the support rod; a connecting rod is fixedly connected to the central rod, and a rotating rod is rotatably fitted to the end of the connecting rod away from the central 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 all form guide grooves for the guide rod to slide; a third bracket is also fixedly connected to the top of the base, and a toothed ring is fixedly connected to the side wall of the third bracket. The toothed ring meshes with the first gear; the horizontal height of the toothed ring is higher than the horizontal height of the guide block; a driving component for driving the central rod to move and a support component for providing support for the central rod are provided at the top of the central rod.

[0009] The technical principle of the above solution is as follows:

[0010] Place different test tubes in different placement grooves, and drive the central rod to rotate through the driving component; when the central rod rotates, it will drive the connecting rod to rotate, and the connecting rod will drive the rotating rod to rotate around the central rod; thereby driving the first gear to roll along the toothed ring; thereby driving the rotating rod to rotate itself, and further causing the guide rod to deflect around the rotating rod; the central rod will also drive the rotating frame to rotate along the arc-shaped groove adjacent to it. Whenever the notch position of the rotating frame aligns with the adjacent arc-shaped groove, at this time the guide rod will turn into the adjacent guide groove, thereby driving the rotating plate to rotate, and further driving the test tube and the magnet block to rotate; making different magnet blocks rotate to the lower part of the magnetic powder box, and further causing the magnetic powder in the magnetic powder box to form different shapes. The experimenter can distinguish each test tube according to the different shapes formed by the magnetic powder; after the test tubes are distinguished, sample addition can be started. After the sample addition is completed, the centrifugation operation can be started through the centrifugation component.

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

[0012] 1. In the existing error-proof sample addition technology, test tubes are marked by pasting labels or printing numbers on the test tubes to distinguish different test tubes. However, during long-term use, it is very likely that the labels will fall off or the etching will wear, resulting in the inability to distinguish test tubes, which is extremely likely to cause incorrect sample addition and thus affect the results of molecular biology experiments. Compared with the existing technology, the magnetic suction force generated by the magnet block is stable and persistent, so that the device's ability to distinguish test tubes is also more stable and persistent, 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 groove, during the experiment, the experimenter does not need to repeatedly pick up and place the test tubes to identify them, reducing the labor consumption of the experimenter. At the same time, it also avoids artificial factors such as test tube dropping, substance spilling or foreign matter mixing caused by repeated picking up and placing, thereby improving the experimental results.

[0013] 2. Through the design of the magnetic powder box and the magnet block in the present invention, by using the different magnetic field sizes, directions and angles generated by magnet blocks of different sizes, different magnetic suction forces are generated, so that the magnetic powder in the magnetic powder box forms different three-dimensional shapes, which is convenient for the experimenter to quickly distinguish different test tubes. The operation is simple. Only by using the adsorption force of the magnet block itself, adsorb magnet blocks of different sizes beside each placement groove, and then put different test tubes into the placement grooves, the experimenter can quickly identify and distinguish each test tube.

[0014] 3. Through the design of the rotating rod in the present invention, the guide rod can rotate periodically. By designing evenly distributed guide grooves, the guide rod will drive the rotating plate to rotate only at regular intervals, effectively prolonging the action effect of each magnet block on the magnetic powder, so that the magnetic powder can better form a complete and stable shape, and also providing a longer observation time for the camera, thereby improving the accuracy of test tube distinction and identification.

[0015] 4. The arc-shaped structure design of the arc-shaped groove and the C-shaped structure design of the rotating frame enable them not to hinder each other during rotation. At the same time, it enables the guide rod to rotate at the notch position of the C-shaped rotating frame, so that the intermittent rotation function of the rotating plate can be realized. At the same time, the arc-shaped structure design of the arc-shaped groove makes the rotation of the rotating plate smoother. The C-shaped structure 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 situation of the rotating frame. When the rotating frame rotates one week, the magnet block under the magnetic powder box is replaced with the next group, making the rotation rhythm of the test tube more regular and the test tube easier to distinguish and identify.

[0016] Further, the centrifugal assembly includes a controller and a second gear fixedly sleeved on the outer sidewall 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 meshes with the third gear; the controller is used to control the telescopic movement of the first telescopic rod and the start and stop of the first driving member.

[0017] Beneficial effects: When centrifugation 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 meshed, and at the same time, the first driving member is controlled to operate. 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 is rotationally matched with the base, therefore, the second gear will drive the rotating rod to rotate, and then drive the test tube in the placement groove to rotate, so as to realize the centrifugation of the substances in the test tube.

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

[0019] Beneficial effects: When test tube identification and differentiation are required, the output distance of the second telescopic rod is controlled by the controller, so that the first gear meshes with the toothed ring, and the rotating frame fits with the arc-shaped groove; then the second driving member is started, and the output shaft of the second driving member will drive the central rod to rotate, so as to realize the intermittent rotation of the rotating plate, and then realize the identification and differentiation of different test tubes.

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

[0021] Beneficial effects: The top plate can provide stable support for the second telescopic rod, so that the second driving member and the central rod can operate stably.

[0022] Further, a plurality of fixing rods are also fixedly connected to the bottom of the top plate, and the ends of the fixing rods far away from the top plate are fixedly connected to the top of the toothed ring.

[0023] Beneficial effects: The fixing rods can provide stable support for the toothed ring, so that the toothed ring can mesh better with the first gear, and improve the overall operation stability of the device.

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

[0025] Beneficial effects: The trapezoidal structural design of the guide blocks can reduce the volume of the guide blocks, reduce the materials required for their production, and thus reduce the production cost; at the same time, it also reduces the occlusion of other components by the guide blocks during rotation, so that the rotating plate can 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 images of the magnetic powder. The controller transmits the images of the magnetic powder to the mobile phone of the experimenter, which facilitates the experimenter to distinguish each test tube. At the same time, by using the revolution and rotation of the first gear, the camera can achieve revolution and rotation, so as to more comprehensively collect images of the entire experimental process.

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

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

[0030] Furthermore, a lighting lamp is fixedly connected in the magnetic powder box, and the controller is used to control the opening and closing of the lighting lamp.

[0031] Beneficial effects: The lighting lamp can illuminate the magnetic powder box, optimize the lighting conditions in the magnetic powder box, so that the operator can more clearly observe the shape formed by the magnetic powder, and thus 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 adsorb to the magnet block, which is convenient for the installation and disassembly of the magnet block, making the work of distinguishing test tubes simpler.

[0034] The additional aspects and advantages of the present invention will be partially given in the following description, partially will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is an axonometric view of the sample addition error prevention device for molecular biology of the present invention.

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

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

[0038] The reference numerals 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, central rod; 10, connecting rod; 11, first gear; 12, toothed 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 implementation manners

[0039] The following is a further detailed description through specific implementation manners:

[0040] Embodiment 1:

[0041] As Figures 1 - 3 shown, an error-proof sample addition device for molecular biology includes 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 test tubes and a centrifugation component for centrifuging test tubes.

[0042] The identification component includes a first bracket 2 rotatably fitted on the top of the base 1. A rotating plate 3 is bolted and fixed to the top of the first bracket 2. The rotating plate 3 is made of a metal material. A placement groove for placing test tubes is circumferentially formed on the rotating plate 3. A number of magnet blocks 4 of different sizes are magnetically adsorbed on the top of the rotating plate 3. A second bracket 5 is also bolted and fixed to the top of the base 1. A magnetic powder box 6 is bolted and fixed 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 a transparent material.

[0043] Guide blocks 7 are symmetrically arranged on both sides of the magnet block 4, and the guide blocks 7 are bolted and fixed to the top of the rotating plate 3. A C-shaped rotating frame 8 is rotatably fitted on the side wall of the rotating plate 3. A number of arc-shaped grooves for rotatably fitting the rotating frame 8 are formed on the rotating plate 3. A support rod is provided on the rotating frame 8, and both ends of the support rod are welded to the inner side wall of the adjacent rotating frame 8. A central rod 9 is bolted and fixed to the top of the support rod. A connecting rod 10 is bolted and fixed to the central rod 9. One end of the connecting rod 10 away from the central rod 9 is rotatably fitted with a rotating rod 14. A first gear 11 is bolted and fixed coaxially to the top of the rotating rod 14. A guide rod 15 is bolted and fixed eccentrically 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 bolted and fixed to the top of the base 1. A toothed ring 12 is bolted and fixed to the side wall of the third bracket 13. The toothed ring 12 meshes 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 prevent the toothed ring 12 from interfering with the guide block 7.

[0044] A camera 24 is fixedly connected to the top of the first gear 11 by bolts, and the controller is used to control the opening and closing of the camera 24. By using the revolution and rotation of the first gear 11, the camera 24 can realize revolution and rotation, so as to be able to collect the images of the entire experimental process and the images of the magnetic powder more comprehensively.

[0045] A driving component for driving the central rod 9 to move and a supporting component for supporting the central rod 9 are provided at the top of the central rod 9.

[0046] The centrifugal component includes a second gear 19 fixedly sleeved on the outer side wall of the first bracket 2 by bolts; a first telescopic rod 16 is fixedly connected to the base 1 by bolts, the output shaft of the first telescopic rod 16 is fixedly connected to a first driving member by bolts, the output shaft of the first driving member is coaxially and fixedly connected to a third gear 18 by bolts, and the second gear 19 meshes with the third gear 18; the controller is used to control the telescopic movement of the first telescopic rod 16 and the start and stop of the first driving member.

[0047] The driving component includes a second telescopic rod 22; the output shaft of the second telescopic rod 22 is fixedly connected to a second driving member by bolts, and the output shaft of the second driving member is coaxially and fixedly connected to the central rod 9 by bolts; the controller is used to control the telescopic movement of the second telescopic rod 22 and the start and stop of the second driving member.

[0048] The supporting component includes a top plate 21; the side wall of the top plate 21 is welded to the side wall of the third bracket 13; the second telescopic rod 22 is fixedly connected to the bottom of the top plate 21 by bolts. 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 images of the magnetic powder and the experimental process to the display for real-time display, which is convenient for the experimental personnel to understand and analyze the experimental process.

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

[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 meshes with the toothed ring 12, and the rotating frame 8 fits with the arc-shaped groove; the first telescopic rod 16 is in a contracted state, and the second gear 19 is separated from the third gear 18.

[0052] With Figure 1For example, when differentiating 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 central rod 9 to rotate, and the central rod 9 drives the connecting rod 10 to rotate. The connecting rod 10 drives the rotating rod 14 and the first gear 11 to revolve around the central rod 9. Since the first gear 11 is bolted to the rotating rod 14 and the rotating rod 14 is rotationally engaged with the connecting rod 10, therefore, the rotating rod 14 drives the first gear 11 to rotate along the toothed ring 12. The first gear 11 drives the rotating rod 14 to rotate. Also, since the guide rod 15 is eccentrically bolted to the rotating rod 14, therefore, the guide rod 15 deflects around the rotating rod 14.

[0053] Meanwhile, the central rod 9 also drives the rotating frame 8 to rotate along the adjacent arc-shaped groove. Since the guide rod 15 is slidably engaged with the guide groove and the guide rod 15 rotates within the notch position of the rotating frame 8, whenever the notch position of the rotating frame 8 aligns with the adjacent arc-shaped groove, at this time, the guide rod 15 will turn into the adjacent guide groove. Due to the limiting effect of the guide groove, the guide rod 15 drives the rotating plate 3 to rotate, thereby driving the test tube and the magnet block 4 to rotate. The magnet blocks 4 at different positions rotate to the lower part of the magnetic powder box 6, and then the magnetic powder in the magnetic powder box 6 forms different shapes. The camera 24 will capture the images 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 every certain period of time, thereby driving the rotating plate 3 to rotate once, effectively extending the action effect of each magnet block 4 on the magnetic powder, enabling the magnetic powder to better form a complete and stable shape, and also providing a longer observation time for the camera 24, thereby improving the accuracy of test tube differentiation and identification.

[0055] The arc-shaped structural design of the arc-shaped groove and the unique C-shaped structural design of the rotating frame 8 ensure that they do not obstruct each other during rotation. At the same time, it enables the guide rod 15 to rotate within the notch position of the rotating frame 8, thereby realizing the intermittent rotation function of the rotating plate 3. At the same time, the arc-shaped structural design of the arc-shaped groove makes the rotation of the rotating plate 3 smoother, and the unique C-shaped structural design of the rotating frame 8 enables the protruding part of the rotating plate 3 to smoothly pass through the rotating frame 8 and better distinguish the rotation of the rotating frame 8. When the rotating frame 8 rotates one week, the magnet block 4 under the magnetic powder box 6 is replaced with the next group, making the rotation rhythm of the test tube more regular and the test tube easier to distinguish and identify.

[0056] After the test tube differentiation is completed, the sample addition can be started. After the sample addition is completed, the centrifugation operation can be started.

[0057] Such as Figure 1As shown, when centrifugation is required, the experimenter controls the extension of the first telescopic rod 16 through the controller, so that the second gear 19 remains engaged with the third gear 18, controls the contraction of the second telescopic rod 22, so that the first gear 11 is separated from the toothed ring 12, and the rotating frame 8 is separated from the arc-shaped groove to avoid obstruction. At the same time, control the operation of the first motor 17. 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 is rotationally matched with the base 1, therefore, the second gear 19 will drive the first bracket 2 to rotate, and then drive the test tube in the placement groove to rotate, so as to realize the centrifugation of the substances in the test tube.

[0058] When centrifugation is not required, only need to keep the first motor 17 stationary and control the first telescopic rod 16 to contract, which will not affect the normal progress of the test tube differentiation work.

[0059] In the existing anti-misloading technology, test tubes are marked by pasting labels or printing numbers on the test tubes to distinguish different test tubes. However, during long-term use, it is very likely that the labels will fall off or be etched and worn, which will lead to the inability to distinguish test tubes, easily cause misloading, and thus affect the effect of molecular biology experiments. Compared with the existing technology, the magnetic suction force generated by the magnet block 4 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. And through the design of the placement groove, during the experiment, the experimenter does not need to repeatedly pick up and place the test tubes to identify them, reducing the labor consumption of the experimenter, and at the same time avoiding human factors such as test tube dropping, substance spilling or foreign matter mixing caused by repeated picking up and placing, thereby improving the experimental effect.

[0060] Embodiment 2:

[0061] As Figure 1 and Figure 2 shown, the difference from the above embodiment is that a plurality of fixing rods 20 are also 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 toothed ring 12.

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

[0063] Embodiment 3:

[0064] As Figure 1 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 occlusion of other components when the guide block 7 rotates, enabling the rotating plate 3 to rotate better.

[0066] Embodiment 4:

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

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

[0069] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill 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 enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present 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 on 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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