Centrifugal device for blood examination

Abstract

The utility model relates to a centrifugal device for blood examination, which comprises a rotating disc detachably connected to a rotating shaft of a centrifugal machine, the rotating disc is provided with a plurality of test tube grooves for accommodating sample tubes, and the bottom of each test tube groove is movably provided with a balancing weight. The mass of the balancing weight is the same as that of a sample tube filled with a blood sample, and under the condition that the sample tube is installed in the test tube groove, the balancing weight is released by the sample tube by pressing the balancing assembly at the bottom of the test tube groove, so that the balancing weight can be separated from the rotating disc. According to the utility model, the balancing weight with the same mass as the sample tube filled with the blood sample is arranged in each test tube groove, so that the mass imbalance between the test tube grooves with the sample tubes and the test tube grooves without the sample tubes is greatly reduced. By means of the design, the tedious steps of manually selecting and adjusting the balance pipe in a traditional method are eliminated, operation errors are reduced, and the operation stability and reliability of the device in the centrifugal process are ensured.

Description

Technical Field

[0001] This utility model relates to the field of blood testing technology, and in particular to a centrifuge device for blood testing. Background Technology

[0002] In the daily work of a hematology laboratory, the centrifuge, as a core piece of equipment, plays a crucial role in separating various components (such as plasma, red blood cells, and white blood cells) from blood samples. These separation steps are of great significance for subsequent biochemical analysis, immunoassays, and pathological diagnosis. However, the instability of centrifuge operation has long plagued laboratory technicians. This instability not only affects the separation effect, potentially leading to sample contamination or component mixing, but also accelerates centrifuge wear, shortens its lifespan, and even poses potential safety hazards.

[0003] To address this issue, one traditional solution is to use a balancing tube. A balancing tube is a precision-designed accessory that, by adjusting the weight and distribution of its internal packing material, effectively compensates for imbalances in the rotating parts of the centrifuge (such as the rotor and sample containers), thereby achieving dynamic balance within the centrifuge. This method alleviates centrifuge instability to some extent, improving separation efficiency and operational safety.

[0004] However, the use of balancing tubes also brings some operational inconveniences. First, since the weight of the rotatable part of the centrifuge may vary depending on the number and distribution of samples, the balancing tubes need to be adjusted according to the specific situation before each use. This not only increases time costs but also increases the complexity of operation. In addition, the balancing tubes need to be removed promptly after each use, which further increases the workload and management difficulty.

[0005] CN221965660U discloses a cell culture centrifuge device that adjusts the weight load on the side of the turntable by changing the number or position of the counterweights, thereby reducing the weight difference in different directions and ultimately improving the stability during the centrifugation process.

[0006] However, according to the patent description, the disassembly and restoration of the counterweight must be done manually by the operator. When a large number of sample tubes need to be centrifuged simultaneously, this process significantly increases the complexity and workload. Furthermore, due to the lack of clear adjustment standards, manually adjusting the counterweight position relies on the operator's experience and subjective judgment. This not only reduces the accuracy of balancing but may also lead to the risk of imbalance during centrifugation, thereby affecting the reliability of experimental results and the safety of the equipment.

[0007] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that this utility model does not have the features of these prior art. On the contrary, this utility model has all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Utility Model Content

[0008] In view of the shortcomings of the prior art, this application proposes a centrifugation device for blood testing, which aims to solve one or more technical problems in the prior art.

[0009] This invention addresses the aforementioned technical problems by proposing a centrifugation device for blood testing. The device includes a rotating disk detachably connected to the centrifuge shaft. The rotating disk has several test tube slots for accommodating sample tubes. A counterweight is movably disposed at the bottom of each test tube slot, and the mass of the counterweight is the same as the mass of the sample tube containing the blood sample. When a sample tube is installed in a test tube slot, the sample tube releases the counterweight by pressing against a balancing component at the bottom of the test tube slot, allowing the counterweight to detach from the rotating disk.

[0010] By placing a counterweight at the bottom of each test tube trough with the same mass as the sample tubes containing blood samples, a highly uniform mass distribution across the entire rotating disc is ensured, even when different numbers of sample tubes are installed. This design effectively solves the problem of centrifugal force imbalance, improves the stability of the centrifugation process, and reduces the risk of vibration or equipment damage caused by imbalance. The counterweight release mechanism enables automatic management and release of the counterweights, eliminating the need for manual adjustment by operators, simplifying the experimental procedure, and improving work efficiency. Furthermore, it reduces errors caused by human intervention, ensuring consistency and repeatability of each centrifugation operation. In addition, the rotors of centrifuges used in existing blood testing are typically detachable for easy operation and maintenance. The rotating disc of this invention can be installed as a rotor on existing centrifuges, achieving automatic balancing without requiring modifications to the existing centrifuge, thus demonstrating strong applicability.

[0011] According to a preferred embodiment, the balancing assembly includes a support plate for supporting a sample tube and a spring connected to the bottom of the support plate. When the sample tube is installed in the test tube slot, the sample tube contacts and presses against the support plate, causing the spring to compress in a first direction X, moving away from the opening of the test tube slot. When the sample tube is removed from the test tube slot, the spring returns to its original deformation, moving the support plate in a second direction Y, closer to the opening of the test tube slot. The spring design ensures that the counterweight is only released after the sample tube is installed, avoiding the risk of the counterweight falling off due to accidental vibration or other external factors. Furthermore, the spring design in the balancing assembly not only provides the necessary elastic restoring force but also ensures that the counterweight can be accurately released or reset. When the sample tube is removed from the test tube slot, the spring returns to its original deformation, moving the support plate in a second direction Y, closer to the opening of the test tube slot. This process allows the counterweight to re-attach to the bottom of the magnetic component even without a sample tube, ensuring a consistent initial state after each operation.

[0012] According to a preferred embodiment, the balancing assembly includes a magnetic component disposed within a test tube trough and a trigger rod extending axially along the trough to connect to the bottom of a support plate. When the support plate moves in a first direction X, the trigger rod approaches and abuts against a counterweight, causing the counterweight, magnetically attracted to the magnetic component, to detach from the rotating disk under the abutting force applied by the trigger rod. The trigger rod design in the balancing assembly automatically triggers the counterweight release mechanism when a sample tube is inserted into the test tube trough. When the support plate moves in the first direction X, the trigger rod approaches and abuts against the counterweight, applying sufficient abutting force to overcome the magnetic component's attraction to the counterweight, causing the counterweight to detach from the rotating disk. This design ensures that the counterweight detaches from the rotating disk after each sample tube insertion, achieving automatic mass compensation and maintaining the overall mass balance of the rotating disk. Through the synergistic action of the trigger rod and the magnetic component, the operator does not need to manually adjust the position of the counterweight; simply inserting the sample tube completes the balancing process. This not only improves work efficiency but also reduces errors caused by human intervention, ensuring consistency and reliability in each centrifugation operation.

[0013] According to a preferred embodiment, the centrifuge device includes a support plate located below a rotating disk. The support plate, which receives counterweights released by a balancing assembly, has a second central hole. The centrifuge shaft passes through the second central hole and connects to a first central hole on the rotating disk, ensuring the rotating disk and support plate are coaxially arranged. The inner diameter of the second central hole is larger than the outer diameter of the shaft, forming a clearance fit, allowing the support plate to rotate freely around the shaft without contacting it. When counterweights are transferred from the rotating disk to the support plate, the support plate accurately receives and secures them, maintaining the overall stability of the device and preventing vibration or instability due to mass imbalance during centrifugation. Furthermore, the inner diameter of the second central hole is slightly larger than the outer diameter of the shaft, forming a clearance fit, ensuring the support plate can rotate freely around the shaft or remain stationary without contacting it. This design avoids the possibility of the support plate rotating with the shaft, thus preventing system imbalance or other mechanical problems caused by unnecessary movement of the support plate.

[0014] According to a preferred embodiment, the sidewall of the rotating disk is provided with a first indicator mark, and the sidewall of the support disk is provided with a second indicator mark. The rotating disk and / or the support disk can rotate about a rotation axis, thereby making the indicator marks of the two correspond to each other. The upper surface of the support disk is provided with a plurality of storage cavities, the same number as the number of test tube troughs. The size of the storage cavities is sufficient to accommodate the counterweight detached from the rotating disk. When the first indicator mark and the second indicator mark correspond, the position of the test tube trough also corresponds to the storage cavity in the axial direction. The first indicator mark on the sidewall of the rotating disk and the second indicator mark on the sidewall of the support disk are designed to clearly indicate the relative positional relationship between the two components visually. When the first indicator mark and the second indicator mark are aligned, the test tube trough on the rotating disk and the storage cavity on the support disk are precisely corresponding in the axial direction. This precise alignment mechanism not only improves the convenience and accuracy of operation, but also ensures the consistency and repeatability of each centrifugation operation.

[0015] According to a preferred embodiment, the support plate can be lifted along the rotation axis in the second direction Y, so that when the sample tube is removed from the test tube slot, the counterweight located in the storage chamber is re-adsorbed to the bottom of the magnetic component. This design achieves automated reset of the counterweight, eliminating the need for operators to adjust the position of the counterweight one by one, simplifying the blood centrifugation process, improving work efficiency, reducing errors caused by human intervention, and ensuring the consistency and reliability of each centrifugation operation.

[0016] According to a preferred embodiment, the bottom surface of the carrier tray is provided with a plurality of feet, and the bottom of the feet is provided with suction cups to detachably mount the carrier tray onto the surface of the centrifuge platform. The design of the feet and suction cups ensures a stable connection between the carrier tray and the centrifuge platform surface, providing reliable suction force in various blood testing laboratory environments and preventing displacement or vibration of the carrier tray during centrifugation.

[0017] According to a preferred embodiment, the support plate is provided with an elastic sealing ring at its edge. When the sample tube presses against the support plate, the elastic sealing ring fills the gap between the bottom of the sample tube and the inner wall of the test tube groove. The presence of the elastic sealing ring not only enhances the sealing performance but also reduces the shaking or displacement of the sample tube during high-speed rotation through close contact. This helps maintain the vertical position of the sample tube, ensuring its stability during centrifugation and avoiding centrifugation imbalance caused by tilting or moving the sample tube.

[0018] According to a preferred embodiment, the storage cavity is equipped with shock-absorbing pads to absorb the impact force generated when the counterweight falls, ensuring the stability of the counterweight's posture as it enters the storage cavity. The shock-absorbing pads are designed to effectively absorb the impact force generated when the counterweight detaches from the rotating disk and falls into the storage cavity, ensuring that the counterweight falls into the storage cavity in a stable posture. This prevents the counterweight from bouncing or shifting due to impact, ensuring that it accurately stays in the predetermined position, facilitating its subsequent re-attachment to the bottom of the rotating disk. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the rotating disk and the support disk of this utility model mounted on a centrifuge;

[0020] Figure 2 This is a schematic diagram of the overall structure of the rotating disk and the bearing disk of this utility model when the indicator marks correspond;

[0021] Figure 3 This is a schematic diagram of the rotating disk of this utility model as viewed from below;

[0022] Figure 4 This is a perspective view of the rotating disk and the carrier disk of this utility model when the indicator marks correspond (no sample tube is placed);

[0023] Figure 5 This is a cross-sectional view of the rotating disk and the carrier disk of this utility model when the indicator marks correspond (no sample tube is placed);

[0024] Figure 6 This is a perspective view of the rotating disk and the carrier disk of this utility model when the indicator marks correspond (sample tubes have been placed);

[0025] Figure 7This is a perspective view of the carrier plate of this utility model when it is lifted upwards.

[0026] List of reference numerals

[0027] 100: Rotating disk; 110: Test tube trough; 120: Balancing assembly; 121: Support plate; 122: Spring; 123: Magnetic component; 124: Trigger rod; 130: Counterweight; 140: First indicator mark; 150: First center hole; 200: Bearing disk; 210: Second center hole; 220: Storage cavity; 230: Support leg; 240: Second indicator mark; 250: Handle; 300: Sample tube; 400: Centrifuge; 410: Rotating shaft; 420: Machine platform. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings.

[0029] Location definition: combined with Figure 2 The direction pointing axially from the pivot 410 towards the fuselage platform 420 is the first direction X; the direction opposite to the first direction X is the second direction Y.

[0030] This utility model relates to a centrifuge device for blood testing, such as... Figure 1 , Figure 2 As shown, the design includes a rotating disk 100 detachably connected to the shaft 410 of the centrifuge 400. The rotating disk 100 has a circular structure, and its outer diameter is designed according to the operating space of the centrifuge 400 to ensure stability and safety during the centrifugation process. Several test tube slots 110 are evenly distributed on the rotating disk 100 in a centrally symmetrical manner. These test tube slots 110 are used to place sample tubes 300 containing blood. They are designed with a cylindrical structure to ensure that the sample tubes 300 can be stably inserted and maintained in a vertical position.

[0031] Preferably, such as Figure 3 , Figure 4 As shown, each test tube trough 110 is equipped with a counterweight 130 at its bottom. The shape and size of the counterweight 130 are designed to fit the groove at the bottom of the test tube trough 110, ensuring that it can move vertically within a limited range. For specific types of blood collection tubes (such as EDTA anticoagulant tubes, heparin sodium anticoagulant tubes, etc.), the volume of blood sample collected each time follows a fixed recommended filling amount. This is to ensure that the sample meets the conditions required for detection and analysis, and to guarantee the accuracy and repeatability of experimental results. Based on this principle, the mass of the counterweight 130 can be designed to be equal to the total mass of the corresponding type of blood collection tube and the amount of standard blood sample it contains.

[0032] When the test tube trough 110 is empty, the counterweight 130 is held at the bottom of the test tube trough 110 by the balancing component 120 built into the rotating disk 100. Once the sample tube 300 is inserted into the test tube trough 110, the sample tube 300 presses against the balancing component 120 at the bottom of the test tube trough 110, triggering the release mechanism of the counterweight 130. At this time, the counterweight 130 will detach from the bottom of the test tube trough 110, ensuring that the test tube trough 110 with the sample tube 300 and the test tube trough 110 without the sample tube 300 achieve mass balance, thereby maintaining the rotational stability of the rotating disk 100 throughout the centrifugation process and avoiding the risk of decreased centrifugation efficiency or equipment damage due to mass imbalance. Preferably, when the operator places the sample tube 300 into the test tube trough 110, a certain force in the first direction X can be applied to the sample tube 300 to ensure that the sample tube 300 can transmit sufficient force to the balancing component 120 to detach the counterweight 130.

[0033] Preferably, such as Figure 4 , Figure 5 As shown, the balancing assembly 120 is used to ensure the rotational stability of the rotating disk 100 in the centrifuge apparatus. It includes a support plate 121 for supporting the sample tube 300 and a spring 122 connected to the bottom of the support plate 121. The support plate 121 is designed with a circular or geometric structure matching the radial cross-sectional shape of the test tube trough 110 to ensure that the sample tube 300 can be stably placed on it. Its surface can be specially treated, such as by coating with an anti-slip coating, to prevent displacement of the sample tube 300 during high-speed rotation. An elastic sealing ring can be provided at the edge of the support plate 121. When the sample tube 300 presses against the support plate 121, the elastic sealing ring can fill the gap between the bottom of the sample tube 300 and the inner wall of the test tube trough 110 to further improve the stability of the sample tube 300. The spring 122 is made of corrosion-resistant, high-strength material, ensuring its long-term stability and reliability. When the sample tube 300 is inserted into the test tube trough 110, as... Figure 6 As shown, it directly contacts and presses against the support plate 121, causing the spring 122 to undergo compressive deformation along the first direction X away from the opening of the test tube groove 110; conversely, when the sample tube 300 is removed from the test tube groove 110, as... Figure 7 As shown, due to its elastic restoring force, the spring 122 will drive the support plate 121 to move along the second direction Y near the opening of the test tube trough 110, and return it to its original position.

[0034] Preferably, such as Figure 4As shown, to achieve the automatic release function of the counterweight 130, the balancing assembly 120 also includes a magnetic component 123 located inside the test tube trough 110 and a trigger rod 124 extending axially along the test tube trough 110 and connected to the bottom of the support plate 121. The magnetic component 123 is typically made of a high-permeability material, which can firmly attract the counterweight 130, ensuring that it is embedded in the bottom of the test tube trough 110 in the non-working state, and ensuring that the lower surface of the counterweight 130 is slightly higher than the bottom edge of the test tube trough 110. This design allows the inner wall of the test tube trough 110 to provide lateral support for the counterweight 130 during the operation of the centrifuge 400, effectively preventing the risk of the counterweight 130 being thrown out of the rotating disk 100 due to centrifugal force. The design of the trigger rod 124 needs to take into account the precise fit with the support plate 121. Its rod body can pass through the spring coil of the spring 122 and the through hole reserved in the magnetic component 123 so that when the support plate 121 moves in the first direction X, the trigger rod 124 can accurately approach and finally abut against the upper surface of the counterweight block 130.

[0035] In the balancing assembly 120 of the centrifuge apparatus, when the trigger rod 124 applies sufficient force to the counterweight 130, it can overcome the attraction force of the magnetic component 123 on the counterweight 130, thereby detaching the counterweight 130 from the rotating disk 100. By rationally designing the length and position of the trigger rod 124, it is ensured that when the sample tube 300 is fully inserted into the test tube slot 110, the sample tube 300, by its own weight and the additional force applied by the operator along the first direction X of the sample tube 300's axial direction, can apply sufficient pressure to the trigger rod 124. This pressure is sufficient to overcome the magnetic attraction force between the magnetic component 123 and the counterweight 130, allowing the counterweight 130 to detach from the rotating disk 100 smoothly and reliably. Furthermore, to further optimize this mechanism, a low-friction material can be used on the contact surface between the trigger rod 124 and the counterweight 130 to minimize the interference of resistance on the detachment process.

[0036] Preferably, such as Figure 1 , Figure 2As shown, in the centrifuge apparatus, a support plate 200 is located below the rotating disc 100, whose main function is to receive the counterweight 130 released by the balancing assembly 120. The bottom surface of the support plate 200 is equipped with several legs 230, each with a suction cup at its bottom for detachably and stably mounting the support plate 200 onto the surface of the centrifuge platform 420. Specifically, the design of the legs 230 ensures a secure connection between the support plate 200 and the platform 420 while maintaining ease of assembly and disassembly. The suction cups are made of highly elastic, chemically resistant materials, providing reliable adhesion in various blood testing scenarios, ensuring that the support plate 200 does not shift or vibrate during centrifugation. The combined design of the legs 230 and the suction cups not only enhances the stability of the support plate 200 but also facilitates equipment maintenance and cleaning. Operators can easily remove the support plate 200 by releasing the suction cups for necessary inspection or cleaning.

[0037] To ensure the coaxial arrangement between the rotating disk 100 and the carrier disk 200, and to allow them to move independently, the carrier disk 200 has a second central hole 210, while the rotating disk 100 has a first central hole 150. The rotating shaft 410 of the centrifuge 400 passes through these two central holes, fixing the rotating disk 100 to the main body of the centrifuge 400. Specifically, the rotating shaft 410 is rigidly connected to the rotating disk 100 through the first central hole 150 to ensure that the rotating disk 100 can rotate synchronously with the rotating shaft 410; while the inner diameter of the second central hole 210 is slightly larger than the outer diameter of the rotating shaft 410, forming a clearance fit, so that the carrier disk 200 can remain stationary during centrifugation and not rotate with the rotating shaft 410.

[0038] The purpose of this design is to maintain precise mass balance between the sample tube 300 and the counterweight 130 during centrifugation. If the support plate 200 also participates in rotation, the change in the distribution of the counterweight 130 when it is transferred from the rotating plate 100 to the support plate 200 may cause imbalance in the overall device, thus affecting the centrifugation effect and the accuracy of sample processing. By keeping the support plate 200 static, it can be ensured that the counterweight 130 can be accurately released to the predetermined position, maintaining the mass balance of the entire device, thereby ensuring the stability of the centrifugation process and the reliability of the experimental results.

[0039] Preferably, such as Figure 1 , Figure 2 , Figure 6As shown, to ensure the precise alignment of the sample tube 300 and the counterweight 130 and the effectiveness of the release mechanism, a first indicator mark 140 is provided on the outer wall of the rotating disk 100. This mark can be configured as one or more raised or recessed arrows for visual alignment. Correspondingly, a second indicator mark 240 is provided on the outer wall of the carrier disk 200, whose shape and position match the first indicator mark 140, also using raised or recessed arrows to ensure accurate alignment. Before the rotating disk 100 starts centrifugal rotation, the operator can manually rotate the rotating disk 100 and / or the carrier disk 200 to align the indicator marks. After the rotating disk 100 finishes centrifugal rotation, since the carrier disk 200 does not rotate synchronously with the rotating disk 100, the above-mentioned indicator mark alignment process needs to be repeated to ensure that the rotating disk 100 and the carrier disk 200 have the same positional correspondence before and after centrifugation.

[0040] Preferably, the upper surface of the support plate 200 is provided with a plurality of storage cavities 220, the number of which corresponds one-to-one with the test tube slots 110 on the rotating plate 100. With the first indicator mark 140 and the second indicator mark 240 aligned, the test tube slots 110 on the rotating plate 100 and the storage cavities 220 on the support plate 200 achieve a precise axial correspondence. Each storage cavity 220 is designed as a circle or a geometry matching the shape of the counterweight 130 to ensure that the counterweight 130 can fall smoothly and be stored securely, thereby preventing unexpected displacement of the counterweight 130 on the support plate 200 due to mechanical vibration during the movement of the centrifuge 400. The inner diameter of the storage cavity 220 is slightly larger than the maximum outer diameter of the counterweight 130, providing an appropriate clearance to prevent jamming. More preferably, the storage cavity 220 is equipped with a shock-absorbing pad, which can be made of silicone or polyurethane material, to absorb the impact force generated when the counterweight 130 falls out, ensuring the stability of the counterweight 130 when it falls into the storage cavity 220, and reducing noise and vibration. In addition, the inner surface of the storage cavity 220 is coated with a wear-resistant coating to reduce wear on the counterweight 130 during repeated entry and exit from the storage cavity 220. The bottom of the storage cavity 220 may also have a slight taper or guide slope to facilitate the smooth sliding of the counterweight 130.

[0041] Ensuring that the rotating disk 100 and the carrier disk 200 have the same positional correspondence before and after centrifugation serves two purposes: first, it ensures that the counterweight 130 detached from the rotating disk 100 can accurately fall into the storage cavity 220 on the carrier disk 200; second, it ensures that the operator can easily re-attach all the counterweights 130 to the bottom of their original corresponding magnetic components 123 without having to make individual fine adjustments to the positions of one or more counterweights 130 on the carrier disk 200. This design relies on the strict axial alignment precision between the rotating disk 100 and the carrier disk 200, ensuring that each test tube groove 110 is perfectly aligned axially with its corresponding storage cavity 220, thereby ensuring the precise transfer of the counterweight 130.

[0042] To achieve this function, the support plate 200 can be lifted along the second direction Y under the guidance of the rotating shaft 410. After the sample tube 300 is removed from the test tube slot 110, thanks to the one-to-one correspondence between the number and position of the storage cavity 220 and the test tube slot 110, the counterweights 130 located in the storage cavity 220 can automatically and accurately re-adsorb onto the bottom of their respective magnetic components 123. The clearance fit between the support plate 200 and the rotating shaft 410 ensures that it can rotate freely or remain stationary without contacting the rotating shaft 410, while the lifting action of the support plate 200 along the second direction Y is driven manually or mechanically. Preferably, the side wall of the support plate 200 is provided with several handles 250 to provide convenience for manually driving the lifting of the support plate 200. In addition, the support legs 230 of the support plate 200 can also be configured as electric telescopic rods to realize automated lifting driven by mechanical means, further simplifying the operation process and improving efficiency.

[0043] It should be noted that the above specific embodiments are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection scope. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A centrifugation apparatus for blood testing, comprising a rotating disk (100) detachably connected to a shaft (410) of a centrifuge (400), characterized in that, The rotating disk (100) has several test tube slots (110) for accommodating sample tubes (300), and each test tube slot (110) has a counterweight (130) movably disposed at its bottom. When the sample tube (300) is installed in the test tube trough (110), the sample tube (300) releases the counterweight (130) by pressing the balancing assembly (120) at the bottom of the test tube trough (110), so that the counterweight (130) can be detached from the rotating disk (100).

2. The centrifuge device according to claim 1, characterized in that, The balancing assembly (120) includes a support plate (121) for supporting the sample tube (300) and a spring (122) connected to the bottom of the support plate (121), wherein, When the sample tube (300) is installed in the test tube groove (110), the sample tube (300) contacts and presses the support plate (121), causing the spring (122) to undergo compression deformation in a first direction X away from the opening of the test tube groove (110); When the sample tube (300) is removed from the test tube slot (110), the spring (122) recovers its deformation and drives the support plate (121) to move in the second direction Y, which is close to the opening of the test tube slot (110).

3. The centrifuge device according to claim 2, characterized in that, The balancing assembly (120) includes a magnetic element (123) disposed within the test tube groove (110) and a trigger rod (124) extending axially along the test tube groove (110) to connect to the bottom of the support plate (121), wherein, When the support plate (121) moves in the first direction X, the trigger rod (124) approaches and abuts against the counterweight (130), so that the counterweight (130) which is magnetically attracted to the magnetic component (123) is disengaged from the rotating disk (100) under the abutment force applied by the trigger rod (124).

4. The centrifuge device according to claim 3, characterized in that, The centrifuge device includes a support plate (200) located below the rotating disk (100) for receiving a counterweight (130) released by the balancing assembly (120). The support plate (200) is provided with a second central hole (210), and the shaft (410) of the centrifuge (400) can pass through the second central hole (210) and connect to a first central hole (150) provided on the rotating disk (100) so that the rotating disk (100) and the support plate (200) are kept coaxially arranged. The inner diameter of the second central hole (210) is larger than the outer diameter of the rotating shaft (410) to form a clearance fit, so that the bearing disk (200) can rotate freely around the rotating shaft (410) without contacting it.

5. The centrifuge apparatus according to claim 4, characterized in that, The side wall of the rotating disk (100) is provided with a first indicator mark (140), and the side wall of the bearing disk (200) is provided with a second indicator mark (240). The rotating disk (100) and / or the bearing disk (200) can rotate around the rotating shaft (410) as the axis, so that the indicator marks of the two correspond to each other.

6. The centrifuge apparatus according to claim 5, characterized in that, The upper surface of the support plate (200) is provided with a plurality of storage cavities (220) in the same number as the test tube troughs (110). The size of each storage cavity (220) is sufficient to accommodate the counterweight (130) detached from the rotating plate (100). The inner diameter of each storage cavity (220) is larger than the maximum outer diameter of the counterweight (130). When the first indicator mark (140) and the second indicator mark (240) correspond, the position of the test tube trough (110) also corresponds to the storage cavity (220) in the axial direction.

7. The centrifuge apparatus according to claim 6, characterized in that, The support plate (200) can be lifted along the pivot (410) in the second direction Y so that when the sample tube (300) is removed from the test tube slot (110), the counterweight (130) located in the storage cavity (220) can be re-adsorbed to the bottom of the magnetic component (123).

8. The centrifuge apparatus according to claim 4, characterized in that, The bottom surface of the support plate (200) is provided with a plurality of legs (230), and the bottom of the legs (230) is provided with suction cups to detachably place the support plate (200) on the surface of the centrifuge (400) platform (420).

9. The centrifuge apparatus according to claim 2, characterized in that, The edge of the support plate (121) is provided with an elastic sealing ring. When the sample tube (300) presses the support plate (121), the elastic sealing ring can fill the gap between the bottom of the sample tube (300) and the inner wall of the test tube groove (110).

10. The centrifuge apparatus according to claim 6, characterized in that, The storage cavity (220) is equipped with a shock-absorbing pad to absorb the impact force generated when the counterweight (130) falls off, so as to ensure the stability of the posture of the counterweight (130) when it falls into the storage cavity (220).

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