Freezing tube screwing cap device

Abstract

The present invention discloses a cap screwer for cryopreservation tubes, relates to the field of medical tools, and provides a cap screwer for cryopreservation tubes that is manually usable and can simplify the cap screwing operation. The cap screwer comprises a handheld portion, a main shaft, a rotating shaft, a clamping claw, a button, a tightening sleeve, a rotating shaft driving mechanism, and a tightening sleeve driving mechanism; the handheld portion is connected to the main shaft, the button comprises a button body, a guide rod, and a reset spring, the guide rod is inserted into the main shaft, the button body is connected to the guide rod, the reset spring is located between the button body and the handheld portion and is sleeved on the guide rod, the rotating shaft is inserted into the main shaft, the clamping claw is connected to the rotating shaft, and the tightening sleeve is sleeved on the rotating shaft; the two ends of the tightening sleeve driving mechanism are respectively connected to the button body and the tightening sleeve, and pressing the button can drive the tightening sleeve to tighten the clamping claw; the rotating shaft driving mechanism is connected to the button body and the rotating shaft, and after the tightening sleeve tightens the clamping claw, the button is continued to be pressed, and the rotating shaft driving mechanism can drive the rotating shaft to rotate and drive the clamping claw and the tightening sleeve to rotate.

Description

Technical Field

[0001] The present invention relates to the field of medical tools, in particular to a cap screwing device for cryopreservation tubes. Background Art

[0002] Cryogenic tubes, also known as culture storage tubes, are small tubes used to store bacterial cultures in the laboratory. They consist of a tube body, a cap, a preservative solution, and small porcelain beads. The preservative solution and beads are placed in the tube body, and the cap is placed on the tube body.

[0003] Laboratories often process numerous samples daily, and applicants' labs often need to open and close cryotube caps hundreds of times daily. Manually capping tubes is a significant workload, time-consuming, and labor-intensive. Furthermore, due to the small size of the tubes, manual capping can easily lead to sample contamination, potentially causing errors in subsequent analytical results for scientific research applications and ultimately sabotaging all previous research efforts.

[0004] There are currently some automatic capping devices for cryopreservation tubes, such as ZL202123157219.7 and ZL202120744600.4, which both disclose automatic capping devices for cryopreservation tubes. The automatic capping device for cryopreservation tubes can automatically screw the caps, which can reduce the labor intensity of laboratory staff, improve efficiency, and also help to avoid sample contamination. However, the price of automatic capping devices is tens of thousands or even hundreds of thousands, and the investment is not small. It is relatively more suitable for laboratories or flow-line operation platforms with large and fixed sample volumes. For small sample research groups, experiments that screw the caps dozens to hundreds of times a day are not very suitable. Therefore, the applicant invented a manual capping device for cryopreservation tubes that can simplify the capping operation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a cap screwing device for cryopreservation tubes which is manually used and can simplify the cap screwing operation.

[0006] The technical solution adopted to solve the above problems is: the capping tool for freezing tubes includes a hand-held part, a main shaft, a rotating shaft, a clamping claw, a button, a tightening sleeve, a rotating shaft driving mechanism and a tightening sleeve driving mechanism; the hand-held part is connected to the main shaft, the button and the rotating shaft are respectively located at both ends of the main shaft, the button includes a button body, a guide rod and a reset spring, the guide rod is inserted into the main shaft, the button body is connected to the guide rod, the reset spring is located between the button body and the hand-held part and is sleeved on the guide rod, the rotating shaft is inserted into the main shaft, the clamping claw is connected to the rotating shaft, and the tightening sleeve is sleeved on the rotating shaft; the two ends of the tightening sleeve driving mechanism are respectively connected to the button body and the tightening sleeve, and pressing the button can drive the tightening sleeve to tighten the clamping claw; the rotating shaft driving mechanism is connected to the button body and the rotating shaft. After the tightening sleeve tightens the clamping claw, the button is continued to be pressed, and the rotating shaft driving mechanism can drive the rotating shaft to rotate and drive the clamping claw and the tightening sleeve to rotate.

[0007] Furthermore, the cap screwing tool for cryopreservation tubes includes a transmission pin; the clamping claw includes a claw seat, a claw body, an elastic sheet and a rubber pad; the claw seat is connected to the rotating shaft; the claw body is in the shape of a hollow frustum; the claw body is divided into at least two claw units by a slit; the claw units are connected to the claw seat through the elastic sheet; the rubber pad is arranged in a one-to-one correspondence with the claw units and is connected to the inner surface of the claw units; the tightening sleeve has a conical hole matching the shape of the claw body and a tightening sleeve long hole arranged along the length direction of the claw body; the transmission pin passes through the tightening sleeve long hole and is connected to the rotating shaft.

[0008] Furthermore, the tightening sleeve driving mechanism is arranged in the same direction as the main shaft, and the tightening sleeve driving mechanism includes a sleeve, a driving rod, a support spring and a connecting sleeve. The sleeve passes through the hand-held part and is connected to the button body. The driving rod cooperates with the sleeve. The support spring is located in the sleeve. The two ends of the support spring respectively rest on the button body and the driving rod. The support spring is compressed so that the head of the driving rod rests on the bottom of the sleeve; the tightening sleeve is provided with a connecting ring groove, the connecting sleeve is sleeved on the tightening sleeve and is located in the connecting ring groove, and the connecting sleeve is connected to the driving rod.

[0009] Furthermore, the rotating shaft driving mechanism includes a connecting shaft, a driving shaft, a driving sleeve, a ratchet, a large bevel gear, a connecting rod and a small bevel gear; the connecting shaft is perpendicular to and connected to the main shaft; the driving sleeve is sleeved on the connecting shaft, the driving shaft is connected to the driving sleeve, and there is an eccentricity between the center of the driving shaft and the driving sleeve; the ratchet is sleeved on the driving sleeve, the large bevel gear is sleeved on the ratchet, the small bevel gear is sleeved on the main shaft and meshes with the large bevel gear, and the small bevel gear is connected to the rotating shaft; one end of the connecting rod has a connecting rod long hole, the connecting rod long hole is sleeved on the driving shaft, and the other end of the connecting rod is hinged to the button body, and when the tightening sleeve tightens the clamping claw, the end face of the connecting rod long hole contacts the driving shaft.

[0010] Furthermore, a connecting disc is provided on the rotating shaft, and the connecting disc is connected to the small bevel gear via a fastener.

[0011] Furthermore, the clamping claws are of various models, and the clamping claws are detachably connected to the rotating shaft.

[0012] Furthermore, the capping tool for the cryopreservation tube includes a capping head, the shape of the capping head is a regular polygon, and the capping head can be detachably connected to the rotating shaft.

[0013] Furthermore, the cap screwing device for cryopreservation tubes comprises a telescopic sleeve, which is located between the hand-held portion and the button body and is connected to the both.

[0014] The beneficial effects of the present invention are: 1. It reduces direct contact of hands with sample tubes, reduces the chance of sample contamination, and improves scientific research accuracy; 2. It is easy to carry, about the same size as a pen, and is easy to operate, making it suitable for small sample experiment groups; 3. It is economical and affordable, reduces waste of consumables, saves costs, and can be widely promoted; 4. It rationally utilizes mechanical principles, does not require electricity and high-end refined parts, etc., and saves energy and resources; 5. It reduces the burden on experimenters, allowing more energy to be used for other aspects of scientific research experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a capping device for cryopreservation tubes;

[0016] Figure 2 It is a structural diagram of the clamping sleeve and the clamping claw;

[0017] Figure 3 It is the main view of the clamping claw;

[0018] Figure 4 It is a bottom view of the clamping jaws;

[0019] Figure 5 This is the structural diagram of the screw cap;

[0020] Figure 6 yes Figure 1 Enlarged view of the upper part;

[0021] Figure 7 1. It is a structural diagram of the clamping sleeve driving mechanism;

[0022] Figure 8 It is a structural diagram of the shaft drive mechanism;

[0023] Figure 9 This is a view of the shaft drive mechanism from another direction;

[0024] Marked in the figure are: hand-held part 1, main shaft 2, rotating shaft 3, connecting disk 3-1, clamping claw 4, claw seat 4-1, elastic sheet 4-2, claw body 4-3, claw monomer 4-3-1, slit 4-3-2, rubber pad 4-4, button 5, button body 5-1, guide rod 5-2, return spring 5-3, tightening sleeve 6, tightening sleeve long hole 6-1, tapered hole 6-2, connecting ring groove 6-3, transmission pin 7, tightening sleeve drive mechanism 8, sleeve 8-1, drive rod 8-2, support spring 8-3, connecting sleeve 8-4, rotating shaft drive mechanism 9, connecting shaft 9-1, drive sleeve 9-2, drive shaft 9-3, ratchet 9-4, large bevel gear 9-5, small bevel gear 9-6, connecting rod 9-7, connecting rod long hole 9-7-1, telescopic sleeve 10, capping head 11. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] As shown in the picture Figure 8 As shown, the capping tool for cryopreservation tubes includes a handheld portion 1, a main shaft 2, a rotating shaft 3, a clamping claw 4, a button 5, a tightening sleeve 6, a rotating shaft driving mechanism 9 and a tightening sleeve driving mechanism 8; the handheld portion 1 is connected to the main shaft 2, the button 5 and the rotating shaft 3 are respectively located at both ends of the main shaft 2, the button 5 includes a button body 5-1, a guide rod 5-2 and a return spring 5-3, the guide rod 5-2 is inserted into the main shaft 2, the button body 5-1 is connected to the guide rod 5-2, the return spring 5-3 is located between the button body 5-1 and the handheld portion 1 and It is sleeved on the guide rod 5-2, the rotating shaft 3 is inserted into the main shaft 2, the clamping claw 4 is connected to the rotating shaft 3, and the tightening sleeve 6 is sleeved on the rotating shaft 3; the two ends of the tightening sleeve driving mechanism 8 are respectively connected to the button body 5-1 and the tightening sleeve 6, and pressing the button 5 can drive the tightening sleeve 6 to tighten the clamping claw 4; the rotating shaft driving mechanism 9 is connected to the button body 5-1 and the rotating shaft 3. After the tightening sleeve 6 tightens the clamping claw 4, continue to press the button 5, and the rotating shaft driving mechanism 9 can drive the rotating shaft 3 to rotate and drive the clamping claw 4 and the tightening sleeve 6 to rotate.

[0027] The steps of tightening the cap of a cryopreservation tube using the present invention are as follows: A. Use sterile surgical forceps to clamp / grip the outer edge of the tube cap and slightly close the tube cap; B. Hold the handle 1 with one hand and put the clamping claw 4 on the tube cap of the cryopreservation tube; then press the button 5 with the thumb of the hand, and the tightening sleeve driving mechanism 8 drives the tightening sleeve 6 to move downward, and the tightening sleeve 6 tightens the clamping claw 4, and the clamping claw 4 clamps the tube cap; C. Then continue to press the button 5, the shaft driving mechanism 9 drives the rotating shaft 3 to rotate and drives the clamping claw 4 and the tightening sleeve 6 to rotate, and the clamping claw 4 drives the tube cap to rotate to achieve tightening the cap.

[0028] The guide rod 5-2 is inserted into the main shaft 2 to play a guiding role, which can prevent the button 5 from tilting. The reset spring 5-3 allows the button 5 to automatically reset after being pressed. The precision coefficient of the reset spring 5-3 should be small to avoid significantly increasing the force required to press the button 5.

[0029] The specific structure of the clamping claw 4 and the clamping sleeve 6 is preferably as follows Figures 2 to 4 As shown: the capping tool for cryopreservation tubes includes a transmission pin 7; the clamping claw 4 includes a claw seat 4-1, a claw body 4-3, an elastic sheet 4-2 and a rubber pad 4-4, the claw seat 4-1 is connected to the rotating shaft 3, the claw body 4-3 is in the shape of a hollow frustum, and the claw body 4-3 is equally divided into at least two claw monomers 4-3-1 by a slit 4-3-2, the claw monomer 4-3-1 is connected to the claw seat 4-1 through the elastic sheet 4-2, and the rubber pad 4-4 is arranged in a one-to-one correspondence with the claw monomer 4-3-1 and connected to the inner surface of the claw monomer 4-3-1; the tightening sleeve 6 has a tapered hole 6-2 matching the shape of the claw body 4-3 and a tightening sleeve long hole 6-1 arranged along the length direction of the claw body 4-3, the transmission pin 7 passes through the tightening sleeve long hole 6-1 and is connected to the rotating shaft 3.

[0030] like Figure 2 As shown, the clamping sleeve 6 moves downward, the wall of the tapered hole 6-2 abuts against the surface of the claw body 4-3 and forces the claw body 4-3-1 to swing inward, so that the inner diameter of the claw body 4-3 is reduced to clamp the pipe cover.

[0031] The slit 4-3-2 is used to divide the claw body 4-3 into the claw monomer 4-3-1 and allow the claw monomer 4-3-1 to have room to swing. The elastic sheet 4-2 allows the claw monomer 4-3-1 to swing, and after the clamping sleeve 6 releases the clamping, the claw monomer 4-3-1 can swing back to its original position. The rubber pad 4-4 has a decompression effect to prevent the clamping claw 4 from damaging the pipe cover. The function of the transmission pin 7 is to transmit the rotation of the rotating shaft 3 to the clamping sleeve 6, so that the clamping sleeve 6 and the clamping claw 4 rotate synchronously. The clamping sleeve 6 requires a small amount of axial movement, while the transmission pin 7 does not move axially. The function of the long hole 6-1 of the clamping sleeve is to prevent the transmission pin 7 from interfering with the axial movement of the clamping sleeve 6.

[0032] The specific structure of the clamping sleeve driving mechanism 8 is preferably as follows Figure 7 As shown: the tightening sleeve drive mechanism 8 is arranged in the same direction as the main shaft 2, and the tightening sleeve drive mechanism 8 includes a sleeve 8-1, a driving rod 8-2, a support spring 8-3 and a connecting sleeve 8-4. The sleeve 8-1 passes through the hand-held part 1 and is connected to the button body 5-1, the driving rod 8-2 cooperates with the sleeve 8-1, the support spring 8-3 is located in the sleeve 8-1, and the two ends of the support spring 8-3 respectively rest on the button body 5-1 and the driving rod 8-2. The support spring 8-3 is compressed so that the head of the driving rod 8-2 rests on the bottom of the sleeve 8-1; the tightening sleeve 6 has a connecting ring groove 6-3, the connecting sleeve 8-4 is sleeved on the tightening sleeve 6 and is located in the connecting ring groove 6-3, and the connecting sleeve 8-4 is connected to the driving rod 8-2.

[0033] The support spring 8-3 is compressed, and the support force generated by the compression should be able to meet the needs of the clamping sleeve 6 to clamp the clamping claw 4 and the clamping claw 4 to effectively clamp the pipe cover. It is also preferred that the support spring 8-3 is longer, has a larger initial compression amount, and has a smaller stiffness coefficient.

[0034] The specific process of step B for tightening the cryotube cap of the present invention is as follows: Pressing button 5 causes the entire clamping sleeve drive mechanism 8 to move downward to clamp the clamping sleeve 6 and tighten the clamping claw 4. During this process, the compression of support spring 8-3 remains essentially unchanged. Continued pressing of button 5 causes support spring 8-3 to be further compressed because clamping sleeve 6 cannot move downward any further. Continued pressing of button 5 serves to drive shaft drive mechanism 9. During this process, the compression of support spring 8-3 increases, requiring increased force to press button 5. Therefore, support spring 8-3 is preferably long, with a large initial compression and a suitably low spring constant. Because support spring 8-3 has a suitably low spring constant and a large initial compression, continued pressing of button 5 does not significantly increase the pressing force exerted by support spring 8-3. The purpose of coupling sleeve 8-4, which fits over clamping sleeve 6 and is located within coupling ring groove 6-3, is to both enable rotation of clamping sleeve 6 and drive the clamping sleeve 6 up and down.

[0035] The specific structure of the shaft driving mechanism 9 is preferably as follows Figure 8 As shown: the shaft drive mechanism 9 includes a connecting shaft 9-1, a driving shaft 9-3, a driving sleeve 9-2, a ratchet 9-4, a large bevel gear 9-5, a connecting rod 9-7 and a small bevel gear 9-6; the connecting shaft 9-1 is perpendicular to and connected to the main shaft 2; the driving sleeve 9-2 is sleeved on the connecting shaft 9-1, the driving shaft 9-3 is connected to the driving sleeve 9-2, and there is an eccentricity between the centers of the driving shaft 9-3 and the driving sleeve 9-2; the ratchet 9-4 is sleeved on the driving sleeve 9-2, and the large bevel gear 9-5 is connected to the connecting rod 9-7 and the small bevel gear 9-6. The bevel gear 9-5 is mounted on the ratchet 9-4, the small bevel gear 9-6 is mounted on the main shaft 2 and meshes with the large bevel gear 9-5, and the small bevel gear 9-6 is connected to the rotating shaft 3; one end of the connecting rod 9-7 has a connecting rod long hole 9-7-1, the connecting rod long hole 9-7-1 is mounted on the drive shaft 9-3, and the other end of the connecting rod 9-7 is hinged to the button body 5-1, and when the tightening sleeve 6 tightens the clamping claw 4, the end face of the connecting rod long hole 9-7-1 contacts the drive shaft 9-3.

[0036] When tightening the cryopreservation tube cap in step B, button 5 drives the connecting rod 9-7 downward. However, due to the presence of the connecting rod long hole 9-7-1, the upper end surface of the rod long hole 9-7-1 does not contact the drive shaft 9-3, and the shaft drive mechanism 9 does not drive the rotating shaft 3 to rotate. When step B is completed, the connecting rod long hole 9-7-1 contacts the drive shaft 9-3. At this time, continue to press button 5, the connecting rod 9-7 continues to move downward and drives the drive shaft 9-3 and the drive sleeve 9-2 to rotate. Figure 9By setting the position of the drive shaft 9-3, the connecting rod 9-7 can drive the drive sleeve 9-2 to rotate by an angle of nearly 180°. The drive sleeve 9-2 drives the ratchet 9-4 to rotate, and the ratchet 9-4 drives the large bevel gear 9-5 to rotate by an angle of nearly 180°. The large bevel gear 9-5 drives the small bevel gear 9-6 to rotate for several cycles. The small bevel gear 9-6 drives the rotating shaft 3 to rotate for several cycles. The rotating shaft 3 drives the clamping claw 4 and the tightening sleeve 6 to rotate for several cycles, thus achieving the purpose of screwing the cap. Thereafter, release the button 5, and the connecting rod 9-7 resets. Due to the existence of the ratchet 9-4, the reset of the connecting rod 9-7 only drives the reset of the drive sleeve 9-2. The large bevel gear 9-5 and the small bevel gear 9-6 do not rotate, and will not cause the pipe cap to be loosened again.

[0037] The specific way of connecting the small bevel gear 9-6 to the rotating shaft 3 can be as follows: the rotating shaft 3 has a connecting disk 3-1, and the connecting disk 3-1 is connected to the small bevel gear 9-6 through a fastener.

[0038] There are many types of cryopreservation tubes, and their tube caps have different diameters. In order to adapt to tube caps of different diameters, it is preferred that the clamping claws 4 have multiple types, and the clamping claws 4 are detachably connected to the rotating shaft 3. In this way, different types of clamping claws 4 can be replaced to adapt to tube caps of different diameters.

[0039] Some cryotubes have caps with polygonal inner holes. Such cryotubes can be capped without the clamping claws 4, but can be capped with a capping head 11 that matches the polygonal inner hole. Specifically, the cryotube capping tool includes the capping head 11, which is in the shape of a regular polygon and is detachably connected to the rotating shaft 3.

[0040] In this way, the clamping claw 4 is replaced with the capping head 11, and the capping head 11 is inserted into the polygonal inner hole of the tube cap. The shaft driving mechanism 9 drives the rotating shaft 3 and then drives the capping head 11 to rotate to tighten the cap. At this time, the clamping sleeve driving mechanism 8 does not work.

[0041] The specific manner in which the clamping claw 4 and the capping head 11 are detachably connected to the rotating shaft 3 may be a threaded connection.

[0042] In addition to being used for holding, the handheld portion 1 should also be used as Figure 1 As shown, the majority of the structure of the present invention is obscured, preventing exposure. Alternatively, the following configuration may be employed: the cryotube capping tool includes a telescopic sleeve 10, which is positioned between and connected to the handle 1 and the button body 5-1. The telescopic sleeve 10 is used to obscure the structure between the handle 1 and the button body 5-1. The telescopic sleeve 10 may be a corrugated rubber sleeve.

[0043] The force required to screw the cap of the cryopreservation tube is not very great. The present invention can be mainly made of plastic, and some parts can be made of aluminum alloy to reduce weight and facilitate operation.

[0044] The present invention is mainly used to tighten the cap of the cryopreservation tube. The present invention can also change the setting mode of the drive shaft 9-3. Figure 9 On the basis of, the driving shaft 9-3 is set on the left, then the clamping claw 4 and the clamping sleeve 6 rotate in opposite directions, and the pipe cover can be loosened.

[0045] Using the above-mentioned cryotube cap screwing tool to screw the cap of a cryotube requires some means to secure the tube, such as by holding the tube. The present invention can also add a structure to secure the tube, such as disposing a tube securing structure below the clamping claw 4 and connecting it to the handheld portion 1. The tube can be clamped on the tube securing structure, so that the cap can be screwed without holding the tube or by other means.

Claims

1. A cap screw for cryotubes, characterized by: The invention comprises a handheld part (1), a main shaft (2), a rotating shaft (3), a clamping claw (4), a button (5), a clamping sleeve (6), a rotating shaft driving mechanism (9), a telescopic sleeve (10) and a clamping sleeve driving mechanism (8); the handheld part (1) is connected to the main shaft (2), the button (5) and the rotating shaft (3) are respectively located at two ends of the main shaft (2), the button (5) comprises a button body (5-1), a guide rod (5-2) and a return spring (5-3), the guide rod (5-2) is inserted into the main shaft (2), the button body (5-1) is connected to the guide rod (5-2), the return spring (5-3) is located between the button body (5-1) and the handheld part (1) and is sleeved on the guide rod (5-2), the rotating shaft (3) is inserted into the main shaft (2), the clamping claw (4 ) is connected to the rotating shaft (3), and the tightening sleeve (6) is sleeved on the rotating shaft (3); the two ends of the tightening sleeve driving mechanism (8) are respectively connected to the button body (5-1) and the tightening sleeve (6), and the button (5) is pressed to drive the tightening sleeve (6) to tighten the clamping claw (4); the rotating shaft driving mechanism (9) is connected to the button body (5-1) and the rotating shaft (3), and after the tightening sleeve (6) tightens the clamping claw (4), the button (5) is continued to be pressed, and the rotating shaft driving mechanism (9) can drive the rotating shaft (3) to rotate and drive the clamping claw (4) and the tightening sleeve (6) to rotate; the clamping claw (4) has various models, and the clamping claw (4) and the rotating shaft (3) are detachably connected; the telescopic sleeve (10) is located between the hand-held part (1) and the button body (5-1) and is connected to the two.

2. The capping tool for cryopreservation tubes according to claim 1, characterized in that: The invention comprises a transmission pin (7); the clamping claw (4) comprises a claw seat (4-1), a claw body (4-3), an elastic sheet (4-2) and a rubber pad (4-4); the claw seat (4-1) is connected to the rotating shaft (3); the claw body (4-3) is in the shape of a hollow cone; the claw body (4-3) is equally divided into at least two claw monomers (4-3-1) by a slit (4-3-2); the claw monomer (4-3-1) is connected to the claw seat (4-1) through the elastic sheet (4-2); the rubber pad (4-4) and the claw monomer (4-3-1) are arranged in a one-to-one correspondence and connected to the inner surface of the claw monomer (4-3-1); the clamping sleeve (6) has a tapered hole (6-2) matching the shape of the claw body (4-3) and a clamping sleeve long hole (6-1) arranged along the length direction of the claw body (4-3); the transmission pin (7) passes through the clamping sleeve long hole (6-1) and is connected to the rotating shaft (3).

3. The capping tool for cryopreservation tubes according to claim 2, characterized in that: The clamping sleeve driving mechanism (8) is arranged in the same direction as the main shaft (2). The clamping sleeve driving mechanism (8) comprises a sleeve (8-1), a driving rod (8-2), a support spring (8-3) and a connecting sleeve (8-4). The sleeve (8-1) passes through the handheld portion (1) and is connected to the button body (5-1). The driving rod (8-2) cooperates with the sleeve (8-1). The support spring (8-3) is located in the sleeve (8-1). Two ends of the support spring (8-3) respectively abut on the button body (5-1) and the driving rod (8-2). The support spring (8-3) is compressed so that the head of the driving rod (8-2) abuts against the bottom of the sleeve (8-1). The clamping sleeve (6) is provided with a connecting ring groove (6-3). The connecting sleeve (8-4) is sleeved on the clamping sleeve (6) and is located in the connecting ring groove (6-3). The connecting sleeve (8-4) is connected to the driving rod (8-2).

4. The capping tool for cryopreservation tubes according to claim 1, wherein: The rotating shaft driving mechanism (9) comprises a connecting shaft (9-1), a driving shaft (9-3), a driving sleeve (9-2), a ratchet (9-4), a large bevel gear (9-5), a connecting rod (9-7) and a small bevel gear (9-6); the connecting shaft (9-1) is perpendicular to and connected to the main shaft (2); the driving sleeve (9-2) is sleeved on the connecting shaft (9-1), the driving shaft (9-3) is connected to the driving sleeve (9-2), and there is an eccentricity between the centers of the driving shaft (9-3) and the driving sleeve (9-2); the ratchet (9-4) is sleeved on the driving sleeve (9-2), the large bevel gear (9-5) is connected to the main shaft (2), and the connecting rod (9-7) is connected to the main shaft (9-6). The gear (9-5) is sleeved on the ratchet (9-4), the small bevel gear (9-6) is sleeved on the main shaft (2) and meshed with the large bevel gear (9-5), and the small bevel gear (9-6) is connected to the rotating shaft (3); one end of the connecting rod (9-7) has a connecting rod long hole (9-7-1), the connecting rod long hole (9-7-1) is sleeved on the driving shaft (9-3), the other end of the connecting rod (9-7) is hinged to the button body (5-1), and when the clamping sleeve (6) clamps the clamping claw (4), the end face of the connecting rod long hole (9-7-1) contacts the driving shaft (9-3).

5. The capping tool for cryopreservation tubes according to claim 4, characterized in that: A connecting disc (3-1) is provided on the rotating shaft (3), and the connecting disc (3-1) is connected to the small bevel gear (9-6) via a fastener.

6. The capping tool for cryotubes according to claim 1, wherein: The cover screwing head (11) is in the shape of a regular polygon and can be detachably connected to the rotating shaft (3).

Images