A turntable jig for controlling the position of cryogenic tubes

Abstract

The utility model relates to the technical field of cryopreservation tube processing equipment, concretely to a carousel fixture of control cryopreservation tube position, including support, install carousel fixture on the support, carousel fixture rotates through speed reducer motor drive, be provided with four mounting port on carousel fixture, be provided with a group of cryopreservation tube in each mounting port inboard, the bottom of one side of carousel fixture is provided with two hall proximity switches, the bottom of carousel fixture is installed magnetic block near hall proximity switch department. This carousel fixture of control cryopreservation tube position, this structure innovation adopts hall proximity switch + magnetic block's non - contact type positioning scheme, realizes the promotion of positioning accuracy quality. Hall proximity switch built -in silicon -based semiconductor hall element and signal processing circuit, through magnetic field induction trigger level change, avoided the abrasion problem after long -term use of mechanical limit block, simultaneously, the instantaneousness and stability of magnetic field response can ensure that the positioning signal has no delay, no deviation, can easily satisfy the industry high -precision demand.

Description

Technical Field

[0001] This utility model relates to the technical field of cryopreservation tube processing equipment, and more specifically, to a turntable fixture for controlling the position of cryopreservation tubes. Background Technology

[0002] In the fields of biomedical and life science research and clinical diagnostics, cryovials serve as core containers for carrying bioactive substances such as cells, tissues, blood samples, and microbial strains. The stability and efficiency of their storage, transportation, and processing directly determine the sample quality and the reliability of experimental results. With the rapid development of industries such as precision medicine, cell therapy, and biopharmaceuticals, the demand for biological samples in laboratories and production settings is growing exponentially. The number of cryovials processed at one time has increased from dozens to hundreds or even thousands. Traditional operation modes that rely on manual labor or single-channel equipment can no longer meet the needs of large-scale, automated processing. Traditional cryopreservation tube processing typically employs a fixed tray system, requiring operators to manually pick up and place cryopreservation tubes one by one to complete tasks such as barcode scanning, sample addition, and cryogenic storage. This approach presents three major problems: First, the numerous manual interventions not only result in low efficiency (processing 96 cryopreservation tubes at a time takes 15-20 minutes) but also increase the risk of sample confusion, dropping, or contamination due to operational errors. This is especially problematic in low-temperature environments (such as -80°C freezers or near liquid nitrogen tanks), where operator dexterity is limited, significantly increasing the error rate. Second, the positioning accuracy is poor. The fixed tray structure cannot achieve precise positioning of cryopreservation tubes. When used in conjunction with automated barcode scanners or robotic pipetting arms, positional deviations often lead to scanning failures or misalignment by the robotic arm, requiring repeated adjustments and further reducing processing efficiency. Third, there is insufficient compatibility. Different sizes of cryopreservation tubes (such as 1.8mL, 2mL, and 5mL) require different sized trays, and changing trays necessitates equipment readjustment, increasing equipment maintenance costs and operational complexity. To address these issues, the industry has begun exploring the development of automated cryopreservation tube processing equipment. Rotary structures, with their advantages of high space utilization, strong continuous operation capability, and the ability to integrate multi-station operations, have gradually become the mainstream design direction. However, existing rotary fixtures still face key technical bottlenecks: Firstly, the positioning accuracy during rotary rotation is difficult to guarantee. Most equipment uses mechanical limit blocks for positioning, which, after long-term use, are prone to wear and tear, leading to increased positioning deviations and failing to meet the high-precision alignment requirement of ±0.1mm. Secondly, the lack of a stable position detection mechanism means that real-time feedback on whether the rotary table has reached the preset station is impossible. When the equipment experiences speed fluctuations or load changes, station offsets can easily occur, causing subsequent operation interruptions. Furthermore, some rotary fixtures do not consider the stable fixation and rapid handling requirements of cryopreservation tubes. Cryopreservation tubes are prone to shaking during rotary rotation, and handling requires overcoming significant friction, increasing the risk of sample damage. Utility Model Content

[0003] The purpose of this utility model is to provide a turntable fixture for controlling the position of cryopreservation tubes, so as to solve the problem mentioned in the background art that the positioning accuracy during the turntable rotation process is difficult to guarantee. Most equipment uses mechanical limit blocks for positioning, which are prone to increased positioning deviation due to wear after long-term use, and cannot meet the high-precision alignment requirement of ±0.1mm.

[0004] To achieve the above objectives, this utility model provides a turntable fixture for controlling the position of cryopreservation tubes, including a bracket on which a turntable fixture is mounted. The turntable fixture is driven to rotate by a geared motor. The turntable fixture has four mounting ports, and a set of cryopreservation tubes is arranged inside each mounting port. Two Hall proximity switches are arranged on one side of the bottom of the turntable fixture. A magnetic block is installed on the bottom of the turntable fixture near the Hall proximity switches. The Hall proximity switches have a built-in Hall element made of silicon-based semiconductor material and a signal processing circuit containing an operational amplifier and a comparator. When the Hall proximity switches are powered on, their output is a stable low level when there is no magnetic field. When the magnetic block rotates with the turntable fixture to the sensing area of ​​the Hall proximity switch, the magnetic field passes perpendicularly through the Hall element, causing the internal charge carriers to be deflected by the Lorentz force and generating a Hall voltage. This voltage is amplified and shaped by the signal processing circuit, triggering the output signal to jump to a high level, which is used by the control system to determine that the turntable fixture has reached the preset positioning point.

[0005] This support frame serves as the load-bearing foundation of the overall structure, providing a stable mounting platform for the turntable fixture. The geared motor drives the turntable fixture to rotate around its central axis through output torque. The reduction mechanism lowers the motor speed and increases the output torque, ensuring both stability and controllability during turntable fixture rotation, preventing the cryovials from shaking or shifting due to excessive speed. The four mounting ports on the turntable fixture provide dedicated space for the cryovials. Each group of cryovials can be placed together in the mounting ports, enabling batch handling and synchronous transfer, avoiding the dispersion and cumbersome operation of individual placement. The Hall proximity switch incorporates a silicon-based semiconductor Hall element and signal processing circuitry, achieving positioning detection based on the Hall effect. When there is no magnetic field, the Hall element has no charge carrier deflection, resulting in a stable low-level output. When the magnetic block at the bottom of the turntable rotates to the sensing area, the magnetic field passes perpendicularly through the Hall element, causing the internal charge carriers to deflect under the Lorentz force, generating a weak Hall voltage. This voltage is amplified by an operational amplifier and shaped by a comparator, resulting in a jump from a low level to a high level. Upon receiving the high-level signal, the control system determines that the turntable has reached the preset positioning point, achieving precise stopping.

[0006] Preferably, a notch is provided on one side of the mounting port.

[0007] This geared motor-driven turntable fixture can stably drive four sets of cryopreservation tubes to rotate synchronously, meeting the continuous transfer needs of batch cryopreservation tubes. Compared with traditional fixed pallets, it significantly improves space utilization and transfer efficiency, avoiding the tedious manual handling of each set. Non-contact Hall positioning replaces traditional mechanical limiters, eliminating the risk of mechanical wear. The positioning signal response is rapid and without deviation, ensuring that the mounting port is accurately aligned with the subsequent operation station every time the turntable fixture stops rotating. This provides a high-precision foundation for the collaborative operation of automated equipment and avoids operational errors or interruptions caused by positioning deviations.

[0008] Preferably, the bottom of the turntable fixture is supported and fixed by a number of support columns, and the top of the support columns is equipped with rollers that roll in cooperation with the bottom of the turntable fixture.

[0009] This design features several evenly distributed support columns at the bottom of the turntable fixture, providing multi-point support for the turntable and preventing it from sagging or deforming due to its own weight or the load of the cryopreservation tubes. The rollers at the top of the support columns roll in conjunction with the bottom of the turntable fixture, converting the sliding friction of the turntable into rolling friction, significantly reducing rotational resistance and minimizing wear between the turntable and the support structure.

[0010] Preferably, a divider is installed on the outer wall of the geared motor near the bottom of the turntable fixture.

[0011] This setting divider is installed on the outer wall of the geared motor and near the bottom of the turntable fixture. It can convert the continuous rotational motion output by the geared motor into the intermittent indexing motion of the turntable fixture, ensuring that the turntable fixture rotates step by step at a preset angle and stops stably after each index value. It forms a dual power control of "deceleration + indexing" with the geared motor.

[0012] Preferably, two barcode scanners are mounted on the bracket.

[0013] The two barcode scanners installed on the bracket correspond to different workstations of the turntable fixture, and can scan the barcodes of two sets of cryopreservation tubes simultaneously. When the turntable fixture stops rotating, the two mounting ports are aligned with the two barcode scanners, and the scanners synchronously collect the barcode information of the cryopreservation tubes in the corresponding mounting ports, realizing "dual-station parallel barcode scanning" without having to scan each set of cryopreservation tubes one by one.

[0014] Preferably, a protective cover is installed on the outer side of the turntable fixture.

[0015] This protective cover is installed around the outside of the turntable fixture to form a closed or semi-closed protective space. It can physically isolate dust and impurities from the external environment, preventing them from falling onto the surface of the turntable fixture or cryogenic tubes. At the same time, the protective cover can block the airflow disturbance that may be generated when the turntable rotates, preventing the cryogenic tubes from shaking due to airflow. It can also prevent personnel from accidentally touching the rotating turntable, forming a safety protection barrier.

[0016] Preferably, each group of cryovials contains 96 tubes, which are secured in a cryovial box.

[0017] This setup places 96 cryovials in each group within a matching cryovial box. The internal slots of the box precisely match the size of the cryovials, securing each tube in place and preventing movement within the box. The entire box can be directly inserted into the rotating fixture's mounting port, enabling "whole box loading and unloading" without the need for individual tube loading and unloading. Furthermore, the 96-tube quantity meets the standard requirements of "96-well plates" commonly used in biological experiments, facilitating compatibility with other standardized equipment.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: In this rotary fixture for controlling the position of cryopreservation tubes, this innovative structure employs a non-contact positioning solution combining a Hall effect proximity switch and a magnetic block, achieving a significant improvement in positioning accuracy. The Hall effect proximity switch integrates a silicon-based semiconductor Hall element and signal processing circuitry, triggering a change in voltage level through magnetic field induction, thus avoiding the wear and tear issues associated with mechanical limit blocks after long-term use. Simultaneously, the instantaneous and stable nature of the magnetic field induction ensures that the positioning signal is delay-free and deviation-free, easily meeting the industry's high-precision requirements. This precise positioning not only ensures efficient collaboration with automated barcode scanners and robotic pipetting arms, significantly improving scanning success rates and reducing tube misalignment rates by the robotic arm, but also avoids operational interruptions caused by positioning deviations, significantly reducing equipment setup time. Furthermore, the divider installed on the outer wall of the geared motor further enhances positioning stability. The divider converts the continuous rotation of the motor into intermittent, precise indexing of the turntable, ensuring that the mounting port is precisely aligned with the subsequent operation position (such as the barcode scanning position or the tube picking position) every time the turntable stops. This forms a "dual positioning guarantee" with the Hall proximity switch, ensuring that the positioning accuracy remains stable even when the equipment operates under high load for a long time, completely solving the problem of traditional mechanical positioning becoming increasingly off-center with use. This structure, through a multi-station design and automated integration, significantly improves the processing efficiency of cryopreservation tubes, overcoming the inefficiency of traditional manual and single-channel equipment. The four mounting ports on the turntable fixture can simultaneously hold four sets of cryopreservation tubes. Compared to the processing efficiency of traditional fixed trays, this structure enables a continuous operation mode of "one station operation, multiple stations waiting"—when one set of cryopreservation tubes completes information registration at the scanning station, another set can simultaneously complete sample transfer at the tube retrieval station, significantly shortening the single batch processing time and greatly improving processing efficiency. Meanwhile, the notch design on one side of the mounting port, in conjunction with the barcode scanner, further shortens the operation time. The notch exposes the barcode area of ​​the cryovial, allowing for scanning without additional adjustment of the cryovial position. Combined with the two barcode scanners on the bracket (which can scan two sets of cryovial barcodes simultaneously), the batch scanning time is significantly reduced, information registration efficiency is greatly improved, and the high-efficiency requirements of large-scale biological sample processing scenarios are effectively met. Traditional rotary jigs often suffer from unstable operation and shaky cryovials, leading to rapid equipment wear and high sample damage rates. This design ensures operational stability through multiple features: First, the combination of support columns and rollers at the bottom of the rotary jig evenly distributes the weight of the turntable, preventing deformation or jamming due to uneven stress. The rolling action of the rollers significantly reduces the rotational resistance of the turntable, minimizing the load on the geared motor and effectively extending the equipment's lifespan. Second, the protective cover on the outside of the turntable isolates it from external dust and airflow interference, while preventing cryovials from accidentally falling off during turntable operation. Combined with the cryovial box's function of securing the cryovials, this significantly reduces the swaying amplitude of the cryovials during turntable rotation, greatly improving sample storage safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is one of the partial structural schematic diagrams of this utility model; Figure 3 This is a second schematic diagram of a partial structure of this utility model; Figure 4 This is a schematic diagram of the structure of the rotary table fixture in this utility model; The meanings of the labels in the diagram are as follows: 1. Bracket; 2. Turntable fixture; 21. Mounting port; 22. Notch; 3. Protective cover; 4. Cryopreservation tube; 5. Hall effect proximity switch; 6. Code scanner; 7. Gear motor; 8. Support column; 9. Divider. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides a turntable fixture for controlling the position of cryopreservation tubes, such as... Figures 1-4As shown, the device includes a bracket 1, on which a turntable fixture 2 is mounted. The turntable fixture 2 is driven to rotate by a geared motor 7. The turntable fixture 2 has four mounting ports 21, and a set of cryopreservation tubes 4 are installed inside each mounting port 21. Two Hall proximity switches 5 are installed on one side of the bottom of the turntable fixture 2. A magnetic block is installed on the bottom of the turntable fixture 2 near the Hall proximity switches 5. The Hall proximity switches 5 have a built-in Hall element made of silicon-based semiconductor material and a signal processing circuit containing an operational amplifier and a comparator. When the Hall proximity switches 5 are powered on, their output is stable at a low level when there is no magnetic field. When the magnetic block rotates with the turntable fixture 2 to the sensing area of ​​the Hall proximity switch 5, the magnetic field passes perpendicularly through the Hall element, causing the internal charge carriers to be deflected by the Lorentz force and generating a Hall voltage. This voltage is amplified and shaped by the signal processing circuit, triggering the output signal to jump to a high level, which is used by the control system to determine that the turntable fixture 2 has reached the preset positioning point.

[0022] The rotary fixture 2 driven by the geared motor 7 can stably drive four sets of cryopreservation tubes 4 to rotate synchronously, meeting the continuous transfer requirements of batch cryopreservation tubes 4. Compared with traditional fixed pallets, it significantly improves space utilization and transfer efficiency, avoiding the tedious operation of manual handling of each set. The non-contact positioning composed of Hall proximity switch 5 and magnetic block replaces the traditional mechanical limit switch, eliminating the risk of mechanical wear. The positioning signal response is rapid and without deviation, ensuring that the mounting port 21 can accurately align with the subsequent operation station such as barcode scanning and tube picking each time the rotary fixture 2 stops rotating. This provides a high-precision foundation for the collaboration of automated equipment such as robotic arm tube picking and barcode scanning, avoiding operational errors or interruptions caused by positioning deviations.

[0023] In this embodiment, a notch 22 is provided on one side of the mounting port 21.

[0024] It completely solves the problem of "barcode obstruction by the side wall and need for manual adjustment of cryopreservation tubes" in traditional installation ports, greatly shortens the barcode scanning preparation time, and improves barcode recognition efficiency. At the same time, it ensures that there is no need to touch the cryopreservation tube 4 during the scanning process, reducing the risk of sample contamination or tube damage, providing convenient conditions for batch scanning, and can realize synchronous barcode scanning operation with the multi-station design of the turntable fixture 2.

[0025] Specifically, the bottom of the turntable fixture 2 is supported and fixed by several support columns 8, and rollers are installed on the top of the support columns 8. The rollers roll in cooperation with the bottom of the turntable fixture 2.

[0026] The multi-point support design of the support column 8 ensures that the turntable fixture 2 remains horizontal after bearing the cryopreservation tube 4 for a long time, without deformation or tilting, thus preventing the cryopreservation tube 4 from shaking or falling due to deformation of the turntable fixture 2. The rolling friction between the roller and the turntable fixture 2 replaces the sliding friction, reducing the drive load of the geared motor 7, reducing motor energy consumption and component wear, extending the service life of the equipment, and making the turntable fixture 2 rotate more smoothly and without jamming, thus improving the overall operational stability.

[0027] Furthermore, a divider 9 is installed on the outer wall of the geared motor 7 near the bottom of the turntable fixture 2.

[0028] To further enhance the rotational accuracy and stopping stability of the turntable fixture 2, avoid the "rotational overshoot" or "stopping position deviation" that may occur when the geared motor 7 is driven alone; through the precise indexing of the divider 9, ensure that the four mounting ports 21 on the turntable fixture 2 reach the target position sequentially and evenly, complementing the positioning function of the Hall proximity switch 5, and constructing "dual positioning protection", so that even if the equipment operates under high load for a long time, it can still maintain stable rotational and positioning accuracy.

[0029] Furthermore, two barcode scanners 6 are installed on the bracket 1.

[0030] This doubles the efficiency of batch scanning, significantly shortening information collection time compared to the "scan one group at a time" mode of a single scanner. Simultaneously, the two scanners 6 can each correspond to different operational steps, such as one group for registration and another for verification, improving the accuracy of information collection, avoiding scanning interruptions caused by a single scanner 6 malfunction, and enhancing the reliability of equipment operation. Furthermore, the scanner 6 is mounted on the bracket 1 in a fixed position, ensuring precise relative positioning with the mounting port 21 during each scan.

[0031] Furthermore, a protective cover 3 is installed on the outside of the turntable fixture 2.

[0032] The protective cover 3 isolates dust and impurities, reducing the risk of contamination of cryopreservation tubes 4 and samples, and is especially suitable for the clean environment requirements of biological sample processing; the protective cover 3 blocks airflow disturbances, ensuring that cryopreservation tubes 4 remain stable during the rotation of the turntable fixture 2, and preventing tube shaking or displacement; the protective cover 3 prevents personnel from accidentally touching the rotating turntable fixture 2, reducing operational safety hazards and complying with equipment safety operation specifications.

[0033] Furthermore, each set of cryopreservation tubes contains 96 tubes, which are placed in the matching cryopreservation tube box.

[0034] The whole box loading and unloading method replaces the individual loading and unloading of cryovials, significantly shortening the loading and unloading time of cryovials 4 and improving batch processing efficiency. It is especially suitable for large-scale sample processing scenarios. The cryovial box is highly compatible with the mounting port 21 of the turntable fixture 2, making loading and unloading convenient. The slot fixing design of the cryovial box ensures that the cryovials 4 do not shake or collide during the transfer and rotation with the turntable fixture 2, reducing the risk of tube damage or sample leakage. The specifications of 96 cryovials 4 meet the industry standardization requirements, making it easy to use with other automated equipment such as 96-channel pipettes and 96-well plate centrifuges, improving the overall compatibility and scenario adaptability of the equipment. At the same time, it forms an efficient combination with the multi-mounting port 21 design of the turntable fixture 2.

[0035] When using the rotary fixture that controls the position of cryovials, the operator places each group of 96 cryovials 4 into the matching cryovial box and uses the slots in the cryovial box to fix the position of the cryovials 4 to prevent shaking. Place the cryopreservation tube box containing the cryopreservation tube 4 into the four mounting ports 21 of the turntable fixture 2, ensuring that the barcode area of ​​the cryopreservation tube 4 corresponds to the notch 22 on one side of the mounting port 21, so as to facilitate subsequent barcode scanning. Check the status of each component: confirm that the protective cover 3 is installed around the outside of the turntable fixture 2, the top roller of the support column 8 is in contact with the bottom of the turntable fixture 2, the Hall proximity switch 5 is powered normally, and the geared motor 7 is securely connected to the divider 9. Then start the equipment control system. Power output: The control system issues a start command, the geared motor 7 starts working, and the output continuous rotational power is transmitted to the divider 9; the divider 9 converts the continuous rotation into the intermittent indexing motion of the turntable fixture 2, so that the turntable fixture 2 rotates step by step at a preset angle, such as 90° each time, corresponding to the four mounting ports 21 switching positions in sequence. Positioning detection: During the rotation of the turntable fixture 2, the magnetic block at its bottom rotates synchronously with the turntable; when the magnetic block rotates to the sensing area of ​​the Hall proximity switch 5, the magnetic field passes perpendicularly through the silicon-based semiconductor Hall element built into the Hall proximity switch 5, causing the charge carriers inside the element to be deflected by the Lorentz force and generating a Hall voltage; after the voltage is amplified and shaped by the signal processing circuit including operational amplifier and comparator, the output signal jumps from low level to high level; Station determination and stop: After the control system receives the high-level signal sent by the Hall proximity switch 5, it determines that the turntable fixture 2 has reached the preset station, such as the barcode scanning station or the tube picking station, and then sends a stop command to the geared motor 7. The turntable fixture 2 stops precisely, and at this time one or two mounting ports 21 are exactly aligned with the barcode scanner 6 or external automated equipment such as a robotic arm. Barcode scanning: When the mounting port 21 is aligned with the barcode scanner 6, the barcode area of ​​the cryopreservation tube 4 is fully exposed due to the notch 22 on one side of the mounting port 21. The two barcode scanners 6 on the bracket 1 simultaneously scan the barcodes of the two sets of cryopreservation tubes 4, quickly collect sample information and upload it to the control system to realize batch information registration or verification. If barcode verification is required, the turntable fixture 2 can be rotated again to align the same set of cryopreservation tubes 4 with another barcode scanner 6 to complete the secondary verification. Sample transfer / removal: After scanning, the control system restarts the geared motor 7, driving the turntable fixture 2 to rotate to the tube removal station and stop rotating; the external robotic arm or operator can remove the cryovial box containing the cryovial 4 from the installation port 21 for subsequent operations such as sample transfer and low-temperature storage; at the same time, other installation ports 21 can simultaneously refill the cryovial 4, realizing parallel "processing-refilling" and improving efficiency; Continuous operation: Repeating the above "power drive - positioning stop - cryopreservation tube processing" process, the turntable fixture 2 achieves continuous batch transfer and processing of cryopreservation tubes 4 through the cyclic switching of the four mounting ports 21; throughout the process, the rollers at the top of the support column 8 always roll in cooperation with the bottom of the turntable fixture 2 to reduce rotational resistance and ensure smooth and uninterrupted turntable operation; the protective cover 3 isolates external dust and airflow to prevent the cryopreservation tubes 4 from being contaminated or shaking, while also preventing personnel from accidentally touching the rotating parts. After all cryopreservation tubes 4 have been processed, the operator shuts down the equipment control system, the geared motor 7 stops working, and the turntable fixture 2 returns to its initial position; the empty cryopreservation tube box is removed from the installation port 21, the inside of the turntable fixture 2 and the protective cover 3 is cleaned, and all components are checked for damage in preparation for the next use.

[0036] Finally, it should be noted that the electronic components in the barcode scanner 6, divider 9, etc. in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A turntable fixture for controlling the position of cryopreservation tubes, comprising a support (1), characterized in that: A turntable fixture (2) is installed on the bracket (1). The turntable fixture (2) is driven to rotate by a geared motor (7). The turntable fixture (2) has four mounting ports (21). A set of cryopreservation tubes (4) is installed inside each mounting port (21). Two Hall proximity switches (5) are installed on one side of the bottom of the turntable fixture (2). A magnetic block is installed near the Hall proximity switch (5) at the bottom of the turntable fixture (2). The Hall proximity switch (5) has a built-in Hall element made of silicon semiconductor material and a signal processing circuit containing an operational amplifier and a comparator. When the Hall proximity switch (5) is powered on, its output is stable at a low level without the action of a magnetic field. When the magnetic block rotates with the turntable fixture (2) to the sensing area of ​​the Hall proximity switch (5), the magnetic field passes vertically through the Hall element, causing the internal charge carriers to be deflected by the Lorentz force and generating a Hall voltage. After the voltage is amplified and shaped by the signal processing circuit, the output signal jumps to a high level, which is used by the control system to determine that the turntable fixture (2) has reached the preset positioning point. A notch (22) is provided on one side of the mounting port (21); The bottom of the turntable fixture (2) is supported and fixed by several support columns (8), and the top of the support columns (8) is equipped with rollers, which roll in cooperation with the bottom of the turntable fixture (2). A divider (9) is installed on the outer wall of the geared motor (7) near the bottom of the turntable fixture (2).

2. The rotary fixture for controlling the position of cryopreservation tubes according to claim 1, characterized in that: Two barcode scanners (6) are installed on the bracket (1).

3. The rotary fixture for controlling the position of cryopreservation tubes according to claim 1, characterized in that: The turntable fixture (2) is equipped with a protective cover (3) on its outer side.

4. The rotary fixture for controlling the position of cryopreservation tubes according to claim 1, characterized in that: The number of cryovials (4) in each group is 96, which are placed in the matching cryovial box.

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