Forceps for transferring cryo-preservation tubes

Abstract

The utility model discloses a kind of forceps of transfer cryopreservation tube, it is related to cryopreservation tube fixture technical field.The utility model includes finger support block, first finger ring is fixedly connected with finger support block one side, second finger ring is arranged in first finger ring one side.The utility model is obtained by 145° obtuse angle design to fundamentally improve the angle to meet the narrow operating space requirement between liquid nitrogen tank baffle, and stress concentration generated by cryopreservation tube can be reduced by tilting force, avoid the rupture of the pipe body of super-low temperature embrittlement, the anti-skid small sawtooth of the surface of pliers head and the anti-skid line of cryopreservation tube cover skirt outside form physical interlocking, even if pipe body surface icing or frost, still can be through increasing friction force to realize stable clamping, effectively prevent sample leakage accident, compared with traditional tweezers need to maintain clamping state by continuous force, the anti-skid design of this patent can reduce more than 30% hand power consumption in the process of cryopreservation tube transfer, especially suitable for long time batch operation.

Description

Technical Field

[0001] This utility model belongs to the field of cryopreservation tube clamp technology, and in particular relates to a pair of pliers for transferring cryopreservation tubes. Background Technology

[0002] Currently, the commonly used tools in liquid nitrogen storage for transferring cryovials containing cells are hemostatic forceps and extended tweezers. However, hemostatic forceps are too short, causing the operator's hand to be too close to the liquid nitrogen and making it difficult to accurately control the force, which may result in crushing the cryovials that have become brittle due to ultra-low temperature freezing. While extended tweezers can keep the operator away from the liquid nitrogen, they are too strenuous.

[0003] Traditional cryopreservation tube holding tools are mostly ordinary tweezers or forceps. Their structural design is not optimized for the special shape of cryopreservation tubes and the operating scenarios. Conventional forceps heads are mostly linear or have a small-angle opening and closing structure. When handling cryopreservation tubes in confined spaces, the limited operating angle often leads to unstable gripping, which can easily cause cryopreservation tubes to slip or even sample leakage. At the same time, the gripping parts of traditional tools are mostly fixedly connected to the forceps body, which cannot flexibly adjust the gripping range according to the size of the cryopreservation tubes, resulting in poor versatility.

[0004] This invention addresses these problems by designing a novel type of pliers. The pliers head is redesigned with a 145° angle and features small, non-slip serrations. This design allows operators to more easily grasp cryovials floating in liquid nitrogen and transfer them to cryopreservation containers. A semi-circular gripping area is designed downwards from the head, allowing for easy tightening of cryovial caps if they are not properly tightened. Finger supports at the bottom effectively support the operator's fingers and reduce fatigue. Furthermore, the entire pliers body is lengthened to keep the operator's hands as far away from the liquid nitrogen surface as possible, preventing frostbite.

[0005] To address this issue, we provide a pair of pliers for transferring cryopreservation tubes. Utility Model Content

[0006] The purpose of this utility model is to provide a pair of pliers for transferring cryopreservation tubes. Through the cooperation of finger support blocks, first finger rings, second finger rings, noise-absorbing pads, first clamp bodies, second clamp bodies, fixing blocks, fixing screws, semi-circular clamps, 145° clamp heads, and fixing mechanisms, it solves the shortcomings of existing tools in terms of operating angle, clamping adaptability, and noise control, thus solving the problem of safe and efficient transfer of cryopreservation tubes.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to a pair of pliers for transferring cryopreservation tubes, comprising a finger support block, a first finger ring fixedly connected to one side of the finger support block, a second finger ring disposed on one side of the first finger ring, a sound-absorbing pad fixedly connected to the surface of the second finger ring, a first clamp body and a second clamp body respectively fixedly connected to the surfaces of the first and second finger rings, a fixing block fixedly connected to the top of the first clamp body, and a fixing screw movably connected to the top of the second clamp body, the bottom of the fixing screw penetrating the second clamp body and extending into the fixing block, a semi-circular clamp movably connected to one side of both the first and second clamp bodies, and a 145° clamp head movably connected to the other side of the semi-circular clamp, wherein a fixing mechanism is provided inside the semi-circular clamp. The structure includes a snap-fit ​​block, a insert block, and a fixing bolt. The snap-fit ​​block is fixed to both sides of the semi-circular clamp, and the other side of the snap-fit ​​block extends into the interior of the first clamp body, the second clamp body, and the 145° clamp head, respectively. The insert block is fixed to the other side of the first clamp body, the second clamp body, and one side of the 145° clamp head, respectively, and the other side of the insert block extends into the interior of both sides of the semi-circular clamp. The fixing bolts are all movable inside the semi-circular clamp, with the top of the fixing bolt extending to the outside of the semi-circular clamp and the bottom of the fixing bolt extending into the interior of the first clamp body and the second clamp body, respectively. The finger support block is integrally molded from medical-grade ABS material, with a 0.5mm deep anti-slip groove on the surface. Its right side is fixedly connected to the first finger ring via a double-axis hinge, allowing it to rotate horizontally. The shaft rotates ±15° to accommodate different grip postures. The first and second finger rings are elliptical rings with an inner diameter of 32mm, covered with a 3mm thick silicone sound-dampening pad. The inner sides of the two rings are hinged by a 4mm diameter stainless steel pin, with limiting bosses at both ends to prevent over-clamping. The first and second clamp bodies are 28cm long hollow aluminum alloy rods with an anodized surface. An 8mm diameter weight-reducing groove is cut along the axial direction inside the rod. The top is connected to the fixed block and movable seat respectively by M4×10mm countersunk bolts. The fixed block has a cubic structure with an M6×1.0 threaded through hole inside. The fixing screw uses a T-shaped handle design and has a tail section... The anti-loosening locking ring allows for adjustment of the angle between the two jaws through rotation. It features a semi-circular clamp and a 145° jaw head. The semi-circular clamp is injection molded from polyoxymethylene with an inner arc radius of R8mm and a 0.3mm deep laser-engraved anti-slip grid pattern. The 145° jaw head is a stainless steel stamped part with a rounded tip. It is movably connected to the semi-circular clamp via two sets of M3×8mm hexagonal screws and can rotate ±5° around the vertical axis. The fixing mechanism includes a trapezoidal locking block, integrally molded with the semi-circular clamp through injection molding. The insert block is made of spring steel sheet stamping with a nickel-plated surface and a 12mm slot depth. The fixing bolt head has a limiting flange, and the tail is machined with external threads. Rotation allows for rigid locking of the locking block and the insert block.

[0009] The present invention is further configured such that a reset spring is provided between the first clamp body and the second clamp body, and the two sides of the reset spring are respectively fixedly connected to the surfaces of the first clamp body and the second clamp body.

[0010] The present invention is further configured such that the fixing block has a threaded groove inside, and the surface of the fixing screw is threadedly connected to the inside of the threaded groove.

[0011] The present invention is further configured such that a snap-fit ​​groove is provided on the other side of the first clamp body, the second clamp body, and the 145° clamp head, and the surface of the snap-fit ​​block is movably connected to the inside of the snap-fit ​​groove.

[0012] The present invention is further configured such that slots are respectively provided on both sides of the semi-circular clamp, and the surface of the insert block is movably connected to the inside of the slot.

[0013] The present invention is further configured such that a fixing hole is provided on the top of the second clamp body, and the surface of the fixing screw is movably connected to the inside of the fixing hole.

[0014] The present invention has the following beneficial effects.

[0015] 1. This invention fundamentally improves upon the limitations of traditional tweezers by employing a 145° obtuse angle design. This angle not only meets the requirements of the confined operating space between the liquid nitrogen tank partitions but also reduces stress concentration caused by vertical clamping of the cryovials through tilted force application, preventing breakage due to cryogenic embrittlement. The anti-slip serrations on the forceps head surface physically interlock with the anti-slip texture on the outer side of the cryovial cap, ensuring stable clamping even when the cryovial surface is frozen or frosted, effectively preventing sample leakage. Compared to traditional tweezers that require continuous force to maintain the clamping state, this patented anti-slip design reduces hand strength consumption by more than 30% during cryovial transfer, making it particularly suitable for long-term batch operations.

[0016] 2. The finger support block at the bottom of the clamp body of this utility model features an ergonomic curved surface design, distributing finger pressure to the metacarpal bone area. This allows for continuous operation for over 2 hours while maintaining hand comfort, reducing fatigue by 40% compared to traditional tools. The semi-circular clamping area at the head not only serves as an auxiliary structure for tightening cryovial caps, but its inner diameter is also infinitely adjustable via a combination of locking blocks and slots in the fixing mechanism, compatible with all cryovial specifications from 0.5mL to 5mL, avoiding the frequent replacement issues caused by the fixed clamping range of traditional tools. The 30cm extended clamp body, combined with the 145° clamping head, maintains a safe distance between the operator's hand and the liquid nitrogen surface, effectively reducing the risk of frostbite. Simultaneously, the lever principle amplifies the clamping force by 1.5 times, enabling "easy operation from a distance." Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 A perspective view of a type of forceps for transferring cryopreservation tubes.

[0019] Figure 2 This is a side view of a pair of forceps used for transferring cryopreservation tubes.

[0020] Figure 3 An exploded view of the fixing mechanism in a pair of pliers for transferring cryopreservation tubes.

[0021] Figure 4 An exploded view of the second clamp in a pair of forceps for transferring cryopreservation tubes.

[0022] In the attached diagram: 1. Finger support block; 2. First finger ring; 3. Second finger ring; 4. Noise-absorbing pad; 5. First clamp body; 6. Second clamp body; 7. Fixing block; 8. Fixing screw; 9. Semi-circular clamp; 10. 145° clamp head; 1101. Snap-fit ​​block; 1102. Insert block; 1103. Fixing bolt; 12. Return spring; 13. Threaded groove; 14. Snap-fit ​​groove; 15. Slot; 16. Fixing hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example 1

[0024] Please see Figure 1-4 This utility model relates to a pair of pliers for transferring cryopreservation tubes, comprising a finger support block 1, a first finger ring 2 fixedly connected to one side of the finger support block 1, a second finger ring 3 disposed on one side of the first finger ring 2, a sound-absorbing pad 4 fixedly connected to the surface of the second finger ring 3, a first clamp body 5 and a second clamp body 6 fixedly connected to the surfaces of the first finger ring 2 and the second finger ring 3 respectively, a fixing block 7 fixedly connected to the top of the first clamp body 5, a fixing screw 8 movably connected to the top of the second clamp body 6, the bottom of the fixing screw 8 penetrating the second clamp body 6 and extending into the fixing block 7, a semi-circular clamp 9 movably connected to one side of both the first clamp body 5 and the second clamp body 6, and a 145° clamp head 10 movably connected to the other side of the semi-circular clamp 9, the interior of the semi-circular clamp 9... A fixing mechanism is provided, which includes a snap-fit ​​block 1101, a plug block 1102, and a fixing bolt 1103. The snap-fit ​​block 1101 is fixed to both sides of the semi-circular clamp 9. The other side of the snap-fit ​​block 1101 extends into the interior of the first clamp body 5, the second clamp body 6, and the 145° clamp head 10, respectively. The plug block 1102 is fixed to the other side of the first clamp body 5, the second clamp body 6, and one side of the 145° clamp head 10, respectively. The other side of the plug block 1102 extends into the interior of both sides of the semi-circular clamp 9, respectively. The fixing bolt 1103 is movable inside the semi-circular clamp 9. The top of the fixing bolt 1103 extends into the exterior of the semi-circular clamp 9, and the bottom of the fixing bolt 1103 extends into the interior of the first clamp body 5 and the second clamp body 6, respectively.

[0025] Specifically: Finger support block 1 is made of medical-grade ABS material in one piece, with a 0.5mm deep anti-slip groove on the surface. Its right side is fixedly connected to the first finger ring 2 via a double-axis hinge, and can rotate ±15° around the horizontal axis to adapt to different grip postures. The first finger ring 2 and the second finger ring 3 are elliptical rings with an inner diameter of 32mm, and the surface is covered with a 3mm thick silicone sound-absorbing pad 4. The inner sides of the two rings are hinged by a 4mm diameter stainless steel pin, and the two ends of the pin are equipped with limiting bosses to prevent excessive opening and closing. The first clamp body 5 and the second clamp body 6 are hollow aluminum alloy rods with a length of 28cm, and the surface is anodized. The rod body has an 8mm diameter weight-reducing groove along the axial direction. The top is connected to the fixed block 7 and the movable seat respectively by M4×10mm countersunk bolts. The fixed block 7 is connected to the fixing screw 8. The fixed block 7 has a cubic structure and is internally machined with M6×1.0 threads. The through-hole fixing screw 8 adopts a T-shaped handle design with an anti-loosening stop ring at the tail. The angle between the two clamp bodies can be adjusted by rotation. The semi-circular clamp 9 and the 145° clamp head 10 are made of polyoxymethylene injection molding with an inner arc radius of R8mm and a 0.3mm deep grid anti-slip texture laser engraved on the surface. The 145° clamp head 10 is a stainless steel stamping part with a rounded tip. It is movably connected to the semi-circular clamp 9 by two sets of M3×8mm internal hex screws and can rotate ±5° around the vertical axis. The fixing mechanism, the snap-fit ​​block 1101, is a trapezoidal structure and is integrally molded with the semi-circular clamp 9 by injection molding. The insert block 1102 is made of spring steel sheet stamping with a nickel-plated surface. The slot 15 is 12mm deep. The fixing bolt 1103 has a limiting flange on the head and external threads machined at the tail. The snap-fit ​​block 1101 and the insert block 1102 can be rigidly locked by rotation. Example 2

[0026] Please see Figure 1-4 Based on Embodiment 1, a return spring 12 is provided between the first clamp body 5 and the second clamp body 6. The two sides of the return spring 12 are fixedly connected to the surfaces of the first clamp body 5 and the second clamp body 6, respectively. A threaded groove 13 is provided inside the fixing block 7. The surface of the fixing screw 8 is threadedly connected to the inside of the threaded groove 13. A snap-fit ​​groove 14 is provided on the other side of the first clamp body 5, the second clamp body 6 and the 145° clamp head 10. The surface of the snap-fit ​​block 1101 is movably connected to the inside of the snap-fit ​​groove 14. A slot 15 is provided on both sides of the semi-circular clamp 9. The surface of the insert block 1102 is movably connected to the inside of the slot 15. A fixing hole 16 is provided on the top of the second clamp body 6. The surface of the fixing screw 8 is movably connected to the inside of the fixing hole 16.

[0027] Specifically: A Φ2mm stainless steel helical spring with a preload of 5N is used to keep the clamp body closed in its natural state, reducing continuous force applied by the hand; during clamping operations, the spring is compressed to store energy and automatically resets after release, improving operational efficiency. The M6×1.0 thread inside the fixing block 7 forms a precise fit with the fixing screw 8, with a tightening torque ≥8N・m, ensuring no loosening after the clamp body angle is adjusted, and adapting to the structural stability in an ultra-low temperature environment of -196℃. The gap between the trapezoidal cross section of the snap-fit ​​block 1101 and the snap-fit ​​groove 14 is ≤0.1mm, realizing precise positioning of modular components, preventing the clamp head from shaking during operation, and improving clamping accuracy. The inner wall of the slot 15 is provided with a limiting rib, which forms a circumferential positioning with the groove on the surface of the insert block 1102, ensuring that the semi-circular clamp 9 has no rotational freedom after installation, improving the overall rigidity of the tool. The M6 ​​fixing hole 16 on the upper part of the second clamp body 6 fits with the external thread at the tail of the fixing screw 8, which can finely adjust the opening angle of the clamp head to adapt to the tightening torque requirements of different cryopreservation tube caps.

[0028] The working principle of this utility model is as follows: The operator inserts their thumb and index finger through the first finger ring 2 and the second finger ring 3 respectively, with the middle finger relying on the finger support block 1 as a fulcrum. By pinching the finger rings, the operator drives the first clamp body 5 and the second clamp body 6 to rotate around the pin shaft. At this time, the 145° clamp head 10 is driven outward by the linkage mechanism. The operator aligns the clamp head with the cryopreservation tube floating in liquid nitrogen. After releasing the finger rings, the spring returns to its original position, causing the clamp head to close. The anti-slip serrations form a friction lock with the tube cap surface. If it is necessary to tighten the tube cap, the cryopreservation tube can be inserted vertically. The semi-circular clamp 9 is inserted into the holding area. The torque is applied by rotating the clamp body using the arc surface. After clamping, the finger ring is squeezed again to open the clamp head and transfer the cryopreservation tube to the cryopreservation box. The fixing mechanism allows the axial position of the semi-circular clamp 9 to be adjusted by rotating the fixing bolt 1103, thereby changing the clamping range to accommodate cryopreservation tubes of different specifications. Throughout the operation, the extended clamp body keeps the hand away from the liquid nitrogen surface, the finger support block 1 disperses the gripping pressure, and the return spring 12 reduces fatigue, achieving efficient, safe and accurate transfer of cryopreservation tubes.

[0029] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A pair of pliers for transferring cryopreservation tubes, comprising a finger support block (1), characterized in that: A first finger ring (2) is fixedly connected to one side of the finger support block (1), a second finger ring (3) is provided on one side of the first finger ring (2), a sound-absorbing pad (4) is fixedly connected to the surface of the second finger ring (3), a first clamp body (5) and a second clamp body (6) are fixedly connected to the surfaces of the first finger ring (2) and the second finger ring (3), a fixing block (7) is fixedly connected to the top of the first clamp body (5), a fixing screw (8) is movably connected to the top of the second clamp body (6), the bottom of the fixing screw (8) passes through the second clamp body (6) and extends into the interior of the fixing block (7), a semi-circular clamp (9) is movably connected to one side of both the first clamp body (5) and the second clamp body (6), a 145° clamp head (10) is movably connected to the other side of the semi-circular clamp (9), and a fixing mechanism is provided inside the semi-circular clamp (9); The fixing mechanism includes a snap-fit ​​block (1101), a plug (1102), and a fixing bolt (1103). The snap-fit ​​block (1101) is fixed to both sides of the semi-circular clamp (9). The other side of the snap-fit ​​block (1101) extends into the interior of the first clamp body (5), the second clamp body (6), and the 145° clamp head (10), respectively. The plug (1102) is fixed to the other side of the first clamp body (5), the second clamp body (6), and one side of the 145° clamp head (10), respectively. The other side of the plug (1102) extends into the interior of both sides of the semi-circular clamp (9), respectively. The fixing bolt (1103) is movable inside the semi-circular clamp (9). The top of the fixing bolt (1103) extends to the outside of the semi-circular clamp (9), and the bottom of the fixing bolt (1103) extends into the interior of the first clamp body (5) and the second clamp body (6), respectively.

2. The forceps for transferring cryopreservation tubes according to claim 1, characterized in that: A reset spring (12) is provided between the first clamp body (5) and the second clamp body (6), and the two sides of the reset spring (12) are fixedly connected to the surfaces of the first clamp body (5) and the second clamp body (6) respectively.

3. The forceps for transferring cryopreservation tubes according to claim 1, characterized in that: The fixing block (7) has a threaded groove (13) inside, and the surface of the fixing screw (8) is threadedly connected to the inside of the threaded groove (13).

4. The forceps for transferring cryopreservation tubes according to claim 1, characterized in that: The first clamp body (5), the second clamp body (6) and the 145° clamp head (10) are respectively provided with a snap-fit ​​groove (14), and the surface of the snap-fit ​​block (1101) is movably connected to the inside of the snap-fit ​​groove (14).

5. The forceps for transferring cryopreservation tubes according to claim 1, characterized in that: The semi-circular clamp (9) has slots (15) on both sides, and the surface of the insert (1102) is movably connected to the inside of the slot (15).

6. The forceps for transferring cryopreservation tubes according to claim 1, characterized in that: The second clamp body (6) has a fixing hole (16) at the top, and the surface of the fixing screw (8) is movably connected to the inside of the fixing hole (16).

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