Dispensing mechanism of magnetic bead freeze-dried ball manufacturing equipment

Abstract

This utility model discloses a dispensing mechanism for a magnetic bead freeze-dried ball manufacturing equipment. This mechanism guides the flow of liquid injected into the liquid nitrogen cup, delays the descent time, which is beneficial for the formation of the magnetic bead freeze-dried balls and improves the yield rate. The dispensing mechanism includes a liquid nitrogen cup, a liquid guide rod, a dispensing platform, a dispensing slider, and a dispensing motor. Several liquid nitrogen cups are arranged on the side of the dispensing platform. The liquid guide rod is inserted into the corresponding liquid nitrogen cup along the Z-axis direction, with its upper end higher than the upper surface of the liquid nitrogen cup. The dispensing slider is slidably fitted onto the upper surface of the dispensing platform, and its upper surface has an installation groove. A connecting portion extends laterally from the upper end of the liquid guide rod, and the end of the connecting portion is connected to the installation groove. The dispensing motor is installed in the dispensing platform and is drively connected to the dispensing slider, driving the dispensing slider to reciprocate along the X-axis direction.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic bead freeze-dried ball technology, and in particular refers to a dispensing mechanism of a magnetic bead freeze-dried ball manufacturing equipment. Background Technology

[0002] Magnetic beads typically refer to surface-modified micron or nanometer-sized magnetic particles, commonly used in experiments such as bioseparation, DNA / RNA extraction, and protein purification. Magnetic beads possess superparamagnetism, allowing for rapid separation of target substances under an applied magnetic field. Lyophilization (or freeze-drying) is a technique that removes moisture through freezing and sublimation, widely used for the preservation of biological products. Lyophilized samples exhibit higher stability, facilitating long-term storage and transportation. Lyophilized magnetic beads combine the characteristics of both methods, referring to spherical or granular products formed by lyophilizing magnetic beads. This form of magnetic bead is easier to reconstitute during use and retains its functional properties. Its applications are commonly found in nucleic acid extraction kits, immunoassays, and cell sorting.

[0003] In existing technologies, freeze-dried magnetic beads are typically formed manually by using a pipette to draw liquid from a container and transfer it into liquid nitrogen. This purely manual operation is not only inefficient but also susceptible to human error, resulting in inconsistent sizes and a low yield rate. Generally, automated production processes involve automatically drawing sample liquid containing magnetic beads and injecting it into a liquid nitrogen cup. However, the rapid and short dripping speed of the sample liquid makes it difficult to meet the required forming time, potentially causing the sample liquid to accumulate at the bottom of the liquid nitrogen cup before forming, thus failing to produce spherical freeze-dried magnetic beads. Utility Model Content

[0004] The main purpose of this invention is to provide a dispensing mechanism for a magnetic bead freeze-dried ball manufacturing device, which solves the problems existing in the prior art. It can guide the flow of liquid injected into the liquid nitrogen cup, delay the falling time, which is beneficial to the formation of magnetic bead freeze-dried balls and improves the forming qualification rate.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A dispensing mechanism for a magnetic bead freeze-dried pellet manufacturing device includes a liquid nitrogen cup, a liquid guide rod, a dispensing platform, a dispensing slider, and a dispensing motor. Several liquid nitrogen cups are arranged on the side of the dispensing platform. The liquid guide rod is inserted into the corresponding liquid nitrogen cup along the Z-axis direction, with its upper end higher than the upper surface of the liquid nitrogen cup. The dispensing slider is slidably fitted onto the upper surface of the dispensing platform, and its upper surface is provided with an mounting groove. A connecting portion extends laterally from the upper end of the liquid guide rod, and the end of the connecting portion is connected to the mounting groove. The dispensing motor is installed in the dispensing platform and is drively connected to the dispensing slider, driving the dispensing slider to reciprocate along the X-axis direction.

[0007] A horizontal plate extends from one side of the lower end of the liquid guide rod along the X-axis, and a through hole runs through the two sides of the lower end of the liquid guide rod.

[0008] Preferably, the liquid guide rod and its connecting parts and horizontal plate are all flat strips.

[0009] Preferably, the liquid nitrogen cup is provided with two liquid guide rods.

[0010] Preferably, baffles extend upward from both sides of the horizontal plate, and the baffles and the horizontal plate form a groove-like structure.

[0011] The upper surface of the dispensing station is provided with a dispensing slide rail extending along the X-axis; the dispensing slider is slidably fitted on the dispensing slide rail.

[0012] The dispensing mechanism further includes a mounting shaft that passes through the dispensing slider and extends through the end of the connecting portion; the width of the mounting groove is greater than the width of the connecting portion.

[0013] The side of the dispensing slider is provided with a transmission rack arranged along the X-axis; a transmission gear is coaxially connected to the output shaft of the dispensing motor, and the transmission gear meshes with the transmission rack.

[0014] The dispensing mechanism also includes a dispensing sensor disposed opposite to the dispensing slider, and the dispensing sensor is signal-connected to the dispensing motor.

[0015] Preferably, the dispensing sensor is a photoelectric sensor, and the dispensing slider is provided with a dispensing sensing sheet that moves through the photoelectric sensor as the dispensing slider reciprocates.

[0016] After adopting the above technical solution, the present invention has the following technical effects:

[0017] (1) By setting a liquid guide rod in the liquid nitrogen cup, when injecting sample liquid containing magnetic beads into the liquid nitrogen cup, the surface tension of the liquid guide rod can be used to reduce the falling speed of the sample liquid and prolong the falling time, which is beneficial to the formation of the lyophilized magnetic beads. Furthermore, the liquid guide rod vibrates at a preset frequency to shake the gradually formed lyophilized magnetic beads into the liquid nitrogen cup, thus preventing the lyophilized magnetic beads from condensing on the surface of the liquid guide rod 22 and affecting the subsequent formation of the lyophilized magnetic beads.

[0018] (2) When the injection frequency of the sample liquid and the vibration frequency of the liquid guide rod are kept stable, lyophilized magnetic beads of almost the same size can be obtained, which can ensure the molding qualification rate.

[0019] (3) The vibrating liquid guide rod can give the magnetic bead freeze-dried balls a horizontal force while they are shaken off, so that they fall along a parabola. This can prevent the formed magnetic bead freeze-dried balls from piling up in the same position, so that the magnetic bead freeze-dried balls in the liquid nitrogen cup are distributed relatively evenly. Attached Figure Description

[0020] Figure 1 Three-dimensional representation of a specific embodiment of this utility model Figure 1 .

[0021] Figure 2 Three-dimensional representation of a specific embodiment of this utility model Figure 2 .

[0022] Figure 3 This is an exploded view of a specific embodiment of the present utility model.

[0023] Figure 4 A perspective view of the equipment for manufacturing freeze-dried magnetic beads using this invention.

[0024] Figure 5 A perspective view of the equipment for manufacturing freeze-dried magnetic beads using this invention.

[0025] Figure 6 A three-dimensional view of part of the structure of the magnetic bead freeze-dried ball manufacturing equipment using this utility model.

[0026] Figure 7 A top view of part of the structure of the magnetic bead freeze-dried ball manufacturing equipment using this utility model.

[0027] Figure 8 Three-dimensional pipetting mechanism for magnetic bead freeze-dried bulb manufacturing equipment Figure 1 .

[0028] Figure 9 Three-dimensional pipetting mechanism for magnetic bead freeze-dried bulb manufacturing equipment Figure 2 .

[0029] Figure 10A cross-sectional view of the pipetting mechanism of a device for manufacturing freeze-dried magnetic beads.

[0030] Figure 11 A three-dimensional diagram of the mixing mechanism in the equipment for making freeze-dried magnetic beads.

[0031] Explanation of icon numbers:

[0032] 1-Mixing mechanism; 11-Sample container; 12-Mixing stage; 13-Turntable; 14-Driven gear; 15-Eccentric block; 16-Main gear; 17-Mixing motor; 18-Mixing sensor; 19-Mixing sensing plate;

[0033] 2-Dispensing mechanism; 21-Liquid nitrogen cup; 22-Liquid guide rod; 221-Connecting part; 222-Horizontal plate; 223-Perforation; 224-Baffle; 23-Dispensing platform; 24-Dispensing slider; 241-Mounting groove; 25-Dispensing motor; 26-Dispensing slide rail; 27-Mounting shaft; 28-Transmission rack; 29-Transmission gear; 210-Dispensing sensor; 220-Dispensing sensing element; 230-Cup holder;

[0034] 3-Pipette mechanism; 31-Sampling tip; 32-Pipette body; 321-Piston chamber; 322-Side wing; 33-Piston rod; 34-First pipette motor; 341-Second lead screw; 35-Pressure sensor; 36, 36'-Solenoid valves; 37-Support; 371-First pipette slide rail; 38-Pipette slide block; 381-Second pipette slide rail; 39-Second pipette motor; 391-Synchronous pulley; 310-Pipette slider; 320-First lead screw; 3201-Synchronous pulley; 330-Third pipette motor; 340-First synchronous belt; 350-Second synchronous belt; 360-Clamping component; 370-Motor control circuit board; 380-Connecting plate; 390-Mounting assembly; 3901-Fixed tube; 3902-Moving tube; 3903-First limiting ring; 3904-Second limiting ring; 3905-Buffer spring;

[0035] 4-Electrical control device;

[0036] 5-Operation display device. Detailed Implementation

[0037] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0038] refer to Figures 1 to 7 As shown, this utility model discloses a dispensing mechanism for a magnetic bead freeze-dried ball manufacturing device, including a liquid nitrogen cup 21, a liquid guide rod 22, a dispensing platform 23, a dispensing slider 24, and a dispensing motor 25;

[0039] Several liquid nitrogen cups 21 are provided on the side of the dispensing station 23;

[0040] The liquid guide rod 22 is inserted into the corresponding liquid nitrogen cup 21 along the Z-axis direction, with its upper end higher than the upper surface of the liquid nitrogen cup 21;

[0041] The dispensing slider 24 is slidably fitted on the upper surface of the dispensing platform 23, and the upper surface of the platform is provided with a mounting groove 241;

[0042] The upper end of the liquid guide rod 22 extends laterally into a connecting part 221, and the end of the connecting part 221 is connected to the mounting groove 241.

[0043] The dispensing motor 25 is installed inside the dispensing platform 23 and is connected to the dispensing slider 24 for transmission, and is used to drive the dispensing slider 24 to reciprocate along the X-axis.

[0044] Through the above scheme, the present invention uses a dispensing motor 25 to drive the dispensing slider 24 to reciprocate, which in turn drives the connecting part 221 to reciprocate, thereby causing the liquid guide rod 22 to swing left and right. By setting the liquid guide rod 22 inside the liquid nitrogen cup 21, when injecting the sample liquid containing magnetic beads into the liquid nitrogen cup 21, the surface tension of the liquid guide rod 22 can be used to reduce the falling speed of the sample liquid and prolong the falling time, which is beneficial to the formation of the freeze-dried magnetic beads. Furthermore, the vibration of the liquid guide rod 22 at a preset frequency can shake the gradually formed freeze-dried magnetic beads into the liquid nitrogen cup. Within 21, the lyophilized magnetic beads are prevented from condensing on the surface of the liquid guide rod 22, which would affect the subsequent formation of the lyophilized magnetic beads. At the same time, when the injection frequency of the sample liquid and the vibration frequency of the liquid guide rod 22 are kept stable, lyophilized magnetic beads of almost the same size can be obtained, which can ensure the formation qualification rate. In addition, the vibrating liquid guide rod 22 can give the lyophilized magnetic beads a horizontal force while they are being shaken off, so that they fall along a parabola. This can prevent the formed lyophilized magnetic beads from piling up in the same position, so that the lyophilized magnetic beads in the liquid nitrogen cup 21 are relatively evenly distributed.

[0045] The following illustrates a specific implementation of the dispensing mechanism:

[0046] A horizontal plate 222 extends from one side of the lower end of the aforementioned liquid guide rod 22 along the X-axis, and a through hole 223 runs through the two sides of the lower end of the liquid guide rod 22. By setting the horizontal plate 222 and the through hole 223 connecting its ends, the formed freeze-dried magnetic beads can be received to achieve the purpose of slowing down, and then shaken off to both ends of the horizontal plate 222. The through hole 223 ensures that the freeze-dried magnetic beads can fall in either direction.

[0047] Furthermore, the aforementioned liquid guide rod 22 and its connecting part 221 and horizontal plate 222 are all flat strips. After the sample liquid is injected into the upper end of the liquid guide rod 22, it will automatically be diverted to the two sides of the liquid guide rod 22 and flow downward.

[0048] Meanwhile, each liquid nitrogen cup 21 is equipped with two liquid guide rods 22, which can increase space utilization, improve production efficiency, and shake the formed freeze-dried magnetic beads to multiple locations.

[0049] Secondly, baffles 224 extend upward from both sides of the horizontal plate 222, forming a groove-like structure between the baffles 224 and the horizontal plate 222, which can guide the movement direction of the freeze-dried magnetic beads.

[0050] The upper surface of the dispensing station 23 is provided with a dispensing slide rail 26 extending along the X-axis; the dispensing slider 24 is slidably engaged on the dispensing slide rail 26 to guide the sliding process.

[0051] The dispensing mechanism 2 also includes a mounting shaft 27 that passes through the dispensing slider 24. The mounting shaft 27 passes through the end of the connecting part 221, thereby fixing the connecting part 221 relatively within the mounting groove 241. At the same time, the width of the mounting groove 241 is greater than the width of the connecting part 221, providing space for the connecting part 221 to move axially along the mounting shaft 27 within the mounting groove 241, so that the reciprocating motion of the dispensing slider 24 can cause the connecting part 221 to sway within the mounting groove 241.

[0052] The side of the dispensing slider 24 is provided with a transmission rack 28 arranged along the X-axis; a transmission gear 29 is coaxially connected to the output shaft of the dispensing motor 25. The transmission gear 29 and the transmission rack 28 mesh with each other to realize the transmission connection between the dispensing motor 25 and the dispensing slider 24. By controlling the dispensing motor 25 to perform forward and reverse rotation at a frequency, the dispensing slider 24 can be driven to achieve reciprocating motion.

[0053] The dispensing mechanism 2 also includes a dispensing sensor 210 disposed opposite to the dispensing slider 24. The dispensing sensor 210 is signal-connected to the dispensing motor 25. Specifically, the signal connection is achieved through the electronic control device 4. That is, after the dispensing sensor 210 detects the "position signal", it sends it to the electronic control device 4. After receiving the signal, the electronic control device 4 controls the dispensing motor 25 to switch between forward and reverse rotation, thereby driving the reciprocating motion of the dispensing slider 24.

[0054] Furthermore, the aforementioned dispensing sensor 210 is a photoelectric sensor, and the dispensing slider 24 is provided with a dispensing sensing sheet 220 that moves through the photoelectric sensor as the dispensing slider 24 reciprocates.

[0055] The liquid nitrogen cups 21 are arranged at equal intervals along the length of the dispensing platform 23.

[0056] The liquid nitrogen cup 21 is provided with a cup holder 230 at its bottom. The liquid nitrogen cup 21 is fitted into the cup holder 230 with a gap fit, which can prevent the liquid nitrogen cup 21 from shaking.

[0057] refer to Figures 4 to 11 As shown, this utility model can be specifically applied to a magnetic bead freeze-dried pellet manufacturing device for automated production of magnetic bead freeze-dried pellets. Specifically, the manufacturing device includes a mixing mechanism 1, a dispensing mechanism 2, a pipetting mechanism 3, and an electrical control device 4; the mixing mechanism 1 includes a sample container 11; the sample container 11 is used to hold and mix the sample liquid containing magnetic beads; the pipetting mechanism 3 includes a suction head 31, which is movably fitted above the sample container 11 and the liquid nitrogen cup 21, and draws sample liquid from the sample container 11 and injects sample liquid into the liquid nitrogen cup 21 according to a preset quantity. During injection, the suction head 31 is aligned above the liquid guide rod 22 so that the sample liquid flows down the liquid guide rod 22; wherein, the suction head 31 draws and releases liquid by means of compressed air, which can avoid complex pipeline systems; the electrical control device 4 controls the actions of the mixing mechanism 1, the dispensing mechanism 2, and the pipetting mechanism 3 according to a preset program to achieve automation.

[0058] Therefore, this invention, through the electronic control device 4 controlling the actions of the mixing mechanism 1, the dispensing mechanism 2, and the pipetting mechanism 3 according to a preset program, can automatically perform the sample liquid aspiration and dispensing work, thereby injecting the sample liquid containing magnetic beads into the corresponding liquid nitrogen cup 21 in a preset quantity to form freeze-dried magnetic bead balls, thus realizing an automated production process, which can greatly improve production efficiency and molding qualification rate. The sampling head 31 uses compressed air to aspirate and release the liquid, avoiding complex piping systems.

[0059] refer to Figures 6 to 10 As shown, this is the pipetting mechanism 3 of the magnetic bead freeze-dried pellet manufacturing equipment:

[0060] The aforementioned pipetting mechanism 3 includes a sampling head 31, a pipetting body 32, a piston rod 33, a first pipetting motor 34, a pressure sensor 35, and two solenoid valves 36 and 36'. The pipetting body 32 performs relative motion combining X-axis and Z-axis motion, and has two piston chambers 321. Each piston chamber 321 is dynamically sealed with a piston rod 33, which is driven by the first pipetting motor 34 to perform piston motion. The sampling head 31, the first pipetting motor 34, the pressure sensor 35, and the two solenoid valves 36 and 36' are all mounted on the pipetting body 32. The pressure sensor 35 is used to detect the pressure in the piston chambers 321. The two piston chambers 321 are respectively connected to the sampling head 31 to form two gas paths, which are controlled by the two solenoid valves 36 and 36' respectively. Therefore, by setting two solenoid valves 36 and 36', the on / off relationship between the two piston chambers 321 and the sampling head 31 can be controlled respectively: when the dispensing volume is small, only one piston chamber 321 performs vacuum suction (i.e., the solenoid valve 36 corresponding to the other piston chamber 321 is closed); when the dispensing volume is large, both piston chambers 321 work simultaneously. In this way, different levels of suction force can be achieved, thereby ensuring the suction accuracy at low dispensing volumes.

[0061] As described above, by setting up the pressure sensor 35, the liquid level in the sample container 11 can be detected by the air blowing method, accurately determining the liquid level and ensuring the accuracy of subsequent dispensing (i.e., ensuring that sufficient sample liquid is drawn). The specific liquid level determination process is as follows: when no dispensing action is performed, the pressure detected by the pressure sensor 35 is atmospheric pressure; when liquid level detection is to be performed, the piston rod 33 moves, the suction head 31 continuously descends and blows air, the pressure sensor 35 detects the blowing pressure, and when the suction head 31 descends to a certain height, the pressure begins to change; when the atmospheric pressure - the detection pressure and the relative pressure difference reach a certain threshold range, it is determined to be the liquid level.

[0062] In some embodiments of the above-mentioned pipetting mechanism 3, the first pipetting motor 34 and the two solenoid valves 36 and 36' are all controlled by the electronic control device 4. The air pressure sensor 35 is connected to the electronic control device 4 and can send the detected air pressure signal to the electronic control device 4 to execute the corresponding automated process.

[0063] In some embodiments of the above-described pipetting mechanism 3, the pipetting mechanism 3 further includes a support 37 and a pipetting slide 38; the pipetting slide 38 is slidably fitted onto the support 37 along the X-axis direction; the pipetting body 32 is slidably fitted onto the pipetting slide 38 along the Z-axis direction. This allows for relative movement of the pipetting body 32, that is, relative movement of the sample tip 31, completing the movement of the sample tip 31 between the sample container 11 and the liquid nitrogen cup 21. In this embodiment, the support 37 is disposed on the side of the dispensing mechanism 2; the support 37 is provided with a pair of first pipetting rails 371 extending along the X-axis direction, and the pipetting slide 38 is slidably fitted onto the first pipetting rails 371.

[0064] Furthermore, the aforementioned pipetting mechanism 3 also includes a second pipetting motor 39, a pipetting slider 310, a first lead screw 320, and a third pipetting motor 330. The second pipetting motor 39 is fixed to one side of the pipetting slide 38. The pipetting slider 310 is slidably fitted along the Z-axis direction on the other side of the pipetting slide 38 and is fixedly connected to the pipetting body 32. The first lead screw 320 is mounted on the pipetting slide 38 and threadedly passes through the pipetting slider 310, and is drively connected to the second pipetting motor 39. The third pipetting motor 330 is used to drive the pipetting slide 38. In this embodiment, a second pipetting rail 381 extending along the Z-axis direction is provided on the other side of the aforementioned pipetting slide 38, and the pipetting slider 310 is slidably fitted on the second pipetting rail 381.

[0065] Secondly, the output shaft of the second pipetting motor 39 is arranged upwards, and a synchronous pulley 391 and 3201 are coaxially connected to the output shaft of the second pipetting motor 39 and the end of the first lead screw 320, respectively. A first synchronous belt 340 is tensioned and wound between the two synchronous pulleys 391 and 3201, thereby realizing the transmission connection between the second pipetting motor 39 and the first lead screw 320. A second synchronous belt 350 is provided on the back of the bracket 37. The second synchronous belt 350 is driven by the third pipetting motor 330. A clamping member 360 is provided on the pipetting slide 38 to hold the second synchronous belt 350, thereby realizing the driving of the pipetting slide 38 by the third pipetting motor 330.

[0066] Furthermore, a motor control circuit board 370 is installed on the aforementioned pipetting slide 38 to control the operation of the second pipetting motor 39.

[0067] In some embodiments of the above-described pipetting mechanism 3, the output end of the first pipetting motor 34 is coaxially connected to a second lead screw 341; the lower end of the piston rod 33 is connected to a connecting plate 380, and the second lead screw 341 is threadedly connected to the connecting plate 380. Thus, the first pipetting motor 34 can drive the second lead screw 341 to rotate, thereby causing the connecting plate 380 to move up and down in the Z-axis direction, causing the piston rod 33 to perform piston movement within the piston chamber 321 to achieve air intake and exhaust.

[0068] In some embodiments of the pipetting mechanism 3 described above, the pipetting mechanism 3 further includes a mounting assembly 390 for mounting the sample tip 31; see reference. Figure 10 As shown, the mounting assembly 390 includes a fixed tube 3901, a movable tube 3902, a first limiting ring 3903, a second limiting ring 3904, and a buffer spring 3905. The fixed tube 3901 is fixed to the pipetting body 32 along the Z-axis direction, specifically to a side wing 322 on one side of the pipetting body 32. The movable tube 3902 is movably inserted through the fixed tube 3901, with the first limiting ring 3903 and the second limiting ring 3904 fixed to its upper and lower circumferential surfaces, respectively. The upper end of the movable tube 3902 is connected to the piston chamber 321 through an air tube (not shown in the figure). The buffer spring 3905 is sleeved on the lower end of the movable tube 3902, with its upper and lower ends abutting against the lower end of the fixed tube 3901 and the second limiting ring 3904, respectively. The sampling head 31 is sealed and inserted into the lower end of the movable tube 3902. Therefore, the sampling head 31 can be detachably connected to the pipette body 32, and the sampling head 31 can be replaced according to production needs, avoiding cross-contamination between different magnetic beads; at the same time, the buffer spring 3905 can be used to realize the buffering function during the aspiration process.

[0069] refer to Figure 11 As shown, this is the mixing mechanism 1 of the magnetic bead freeze-dried ball manufacturing equipment:

[0070] The aforementioned mixing mechanism 1 includes a sample container 11, a mixing stage 12, a turntable 13, a driven gear 14, an eccentric block 15, a main gear 16, and a mixing motor 17. The turntable 13 is rotatably fitted onto the mixing stage 12, and the driven gear 14 is coaxially connected to its lower surface. The eccentric block 15 is eccentrically mounted on the upper surface of the turntable 13, on which the sample container 11 is mounted. The main gear 16 meshes with the driven gear 14 and is driven by the mixing motor 17 to achieve rotation. Thus, the mixing motor 17 can drive the sample container 11 to perform regular circular motion, thereby mixing the sample liquid containing magnetic beads.

[0071] Furthermore, a mixing sensor 18 is also provided on the mixing table 12, which is positioned opposite to the turntable 13. The mixing sensor 18 is connected to the electronic control device 4 to detect the number of rotations of the turntable 13. In this embodiment, the mixing sensor 18 is a photoelectric sensor, and a mixing sensing sheet 19 is provided on the turntable 13, which moves through the photoelectric sensor as the turntable 13 rotates.

[0072] In addition, this utility model also includes an operation display device 5 that is signal-connected to the electronic control device 4, preferably a touch screen computer, for convenient setting and display of parameters.

[0073] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A dispensing mechanism for a magnetic bead freeze-dried ball manufacturing equipment, characterized in that: Includes liquid nitrogen cup, liquid guide rod, dispensing platform, dispensing slider and dispensing motor; Several liquid nitrogen cups are provided on the side of the dispensing station; The liquid guide rod is inserted into the corresponding liquid nitrogen cup along the Z-axis direction, and its upper end is higher than the upper surface of the liquid nitrogen cup; The dispensing slider is slidably fitted on the upper surface of the dispensing station, and the upper surface is provided with a mounting groove; The upper end of the liquid guide rod extends laterally into a connecting part, and the end of the connecting part is connected to the mounting groove; The dispensing motor is installed inside the dispensing platform and is connected to the dispensing slider for driving the dispensing slider to reciprocate along the X-axis.

2. The dispensing mechanism of the magnetic bead freeze-dried ball manufacturing equipment as described in claim 1, characterized in that: A horizontal plate extends from one side of the lower end of the liquid guide rod along the X-axis, and a through hole runs through the two sides of the lower end of the liquid guide rod.

3. The dispensing mechanism of the magnetic bead freeze-dried ball manufacturing equipment as described in claim 2, characterized in that: The liquid guide rod, its connecting part, and the horizontal plate are all flat strips.

4. The dispensing mechanism of the magnetic bead freeze-dried ball manufacturing equipment as described in claim 2, characterized in that: The liquid nitrogen cup is equipped with two liquid guide rods.

5. The dispensing mechanism of the magnetic bead freeze-dried ball manufacturing equipment as described in claim 2, characterized in that: Both sides of the horizontal plate extend upwards with baffles, and the baffles and the horizontal plate form a groove-like structure.

6. The dispensing mechanism of the magnetic bead freeze-dried ball manufacturing equipment as described in claim 1, characterized in that: The upper surface of the dispensing station is provided with a dispensing slide rail extending along the X-axis; the dispensing slider is slidably fitted on the dispensing slide rail.

7. The dispensing mechanism of the magnetic bead freeze-dried ball manufacturing equipment as described in claim 1, characterized in that: The dispensing mechanism further includes a mounting shaft that passes through the dispensing slider and extends through the end of the connecting portion; the width of the mounting groove is greater than the width of the connecting portion.

8. The dispensing mechanism of the magnetic bead freeze-dried ball manufacturing equipment as described in claim 1, characterized in that: The side of the dispensing slider is provided with a transmission rack arranged along the X-axis; a transmission gear is coaxially connected to the output shaft of the dispensing motor, and the transmission gear meshes with the transmission rack.

9. The dispensing mechanism of the magnetic bead freeze-dried ball manufacturing equipment as described in claim 1, characterized in that: The dispensing mechanism also includes a dispensing sensor disposed opposite to the dispensing slider, and the dispensing sensor is signal-connected to the dispensing motor.

10. The dispensing mechanism of the magnetic bead freeze-dried ball manufacturing equipment as described in claim 9, characterized in that: The dispensing sensor is a photoelectric sensor, and the dispensing slider is provided with a dispensing sensing sheet that moves through the photoelectric sensor as the dispensing slider reciprocates.

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