Pipetting device for sampling tube

Abstract

The utility model relates to the technical field of pipetting devices, and discloses a pipetting device for a sampling tube, which comprises a pipette, a connecting column is fixedly connected to the inner surface of the pipette, a conical groove is formed in the connecting column, a first spring is fixedly connected to the inner surface of the top of the pipette, and a second spring is fixedly connected to the inner surface of the top of the pipette. The outer surface of the bottom of the first spring is fixedly connected with a blocking block, the blocking block is movably connected with the interior of the conical groove, the outer surface of the top of the blocking block is fixedly connected with two bent rods, the outer surfaces of the two bent rods are fixedly connected with pull rods, and sealing rings are arranged at the joints of the inner surface of the top of the transfer pipette and the bent rods. According to the pipetting device for the sampling tube, during pipetting, a pull rod is pulled to drive a bent rod to enable a blocking block to be separated from the interior of a conical groove and enable a first spring to be compressed, and after pipetting is completed, the first spring is reset to drive the blocking block to seal the conical groove, so that liquid is prevented from infiltrating into a pipetting gun.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid transfer devices, in particular to a liquid transfer device for a sampling tube. Background Art

[0002] In the field of biomedical device technology, sampling tubes are widely used. In order to prevent samples from leaking and being contaminated after collection, the sampling tubes need to be sealed with plastic tube caps. When performing pipetting operations on the sampling tubes, the steps of opening the tube cap, pipetting with a pipette, and closing the tube cap need to be followed in sequence.

[0003] In the prior art, pipetting is usually performed by connecting a pipette to a tip. However, the pipette may be accidentally tilted during the pipetting process, causing the pipette to seep into the interior of the pipette. In addition, liquid reflux may occur during the pipetting process, which may affect the accurate data of the experimental operation. Therefore, a pipette device for a sampling tube is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a liquid transfer device for a sampling tube to solve the problems mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pipette for a sampling tube, comprising a pipette, the inner surface of the pipette is fixedly connected to a connecting column, a conical groove is provided inside the connecting column, a first spring is fixedly connected to the top inner surface of the pipette, a blocking block is fixedly connected to the bottom outer surface of the first spring, the blocking block is movably connected to the inside of the conical groove, two bent rods are fixedly connected to the top outer surface of the blocking block, and pull rods are fixedly connected to the outer surfaces of the two bent rods.

[0006] Furthermore, the bottom outer surface of the pipette is fixedly connected to a conical tube, the interior of the conical tube is movably connected to a ball, the outer surface of the pull rod is fixedly connected to a U-shaped frame, the bottom outer surface of the ball is fixedly connected to a push rod, the bottom outer surface of the push rod is fixedly connected to the upward outer surface of the bottom end of the U-shaped frame, the top outer surface of the ball is fixedly connected to a connecting plate, the inner surface of the pipette is fixedly connected to a fixed plate, and a second spring is fixedly connected between the opposite outer surfaces of the fixed plate and the connecting plate.

[0007] Furthermore, the two curved rods movably penetrate the top outer surface of the pipette, and a sealing ring is provided at the connection between the top inner surface of the pipette and the curved rods.

[0008] Furthermore, the blocking block is in the shape of a truncated cone which is thick at the top and thin at the bottom.

[0009] Furthermore, the outer surfaces of the sphere and the block are fixedly connected with silicone pads.

[0010] Furthermore, the outer surface of the fixed plate is provided with a plurality of through grooves in a circular array.

[0011] Furthermore, the outer surface of the pipette is provided with scale lines, and the pipette is a transparent tube.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The pipetting device for the sampling tube, when pipetting, pulls the pull rod to drive the bent rod to make the block detach from the inside of the conical groove and compress the first spring. After the pipetting is completed, the first spring returns to the original position to drive the block to close the conical groove, thereby preventing the liquid from seeping into the inside of the pipette gun.

[0014] 2. The sampling tube pipetting device, when pipetting, pulls the pull rod to drive the U-shaped frame so that the push rod pushes the ball upward, so that the ball is separated from the inside of the conical tube and the second spring is compressed. After the pipetting is completed, the second spring returns to its original position and drives the ball to close the conical tube, thereby avoiding the situation where liquid reflux may occur during the pipetting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model during liquid transfer sampling;

[0017] Figure 3 This is a schematic diagram of the partial structure of the upper end of the utility model in front view and section;

[0018] Figure 4 It is a schematic diagram of the partial structure of the lower end of the utility model in front view and section.

[0019] In the figure: 1. pipette; 2. connecting column; 3. first spring; 4. blocking block; 5. conical groove; 6. U-shaped frame; 7. bent rod; 8. pull rod; 9. conical cylinder; 10. sphere; 11. fixed disk; 12. connecting disk; 13. second spring; 14. push rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Please refer to Figure 1-Figure 4The utility model provides a technical solution: a pipette device for a sampling tube, comprising a pipette 1, a connecting column 2 is fixedly connected to the inner surface of the pipette 1, a conical groove 5 is provided inside the connecting column 2, a first spring 3 is fixedly connected to the top inner surface of the pipette 1, a blocking block 4 is fixedly connected to the bottom outer surface of the first spring 3, the blocking block 4 is movably connected to the inside of the conical groove 5, two bent rods 7 are fixedly connected to the top outer surface of the blocking block 4, and a pull rod 8 is fixedly connected to the outer surface of the two bent rods 7. In this embodiment, the pipette 1 is connected to the pipette gun, and when pipetting, according to the needs The volume of the liquid to be absorbed is adjusted to the range of the pipette, the pipette 1 is placed in the sampling tube, and the pull rod 8 is pulled upwards with one hand. The pull rod 8 drives the bent rod 7, and the bent rod 7 drives the blocking block 4, so that the blocking block 4 moves upwards, thereby compressing the first spring 3, and the blocking block 4 is separated from the conical groove 5, so that the adsorption force generated by the pipette can pass through the pipette 1, thereby generating an adsorption force to absorb the liquid. After the absorption is completed, the pull rod 8 is loosened, the first spring 3 and the second spring 13 are reset, and the first spring 3 drives the blocking block 4 to close the conical groove 5, thereby preventing the liquid from seeping into the inside of the pipette.

[0022] The bottom outer surface of the pipette 1 is fixedly connected with a conical tube 9, and the inside of the conical tube 9 is movably connected with a ball 10. The outer surface of the pull rod 8 is fixedly connected with a U-shaped frame 6. The bottom outer surface of the ball 10 is fixedly connected with a push rod 14. The bottom outer surface of the push rod 14 is fixedly connected to the upper outer surface of the bottom end of the U-shaped frame 6. The top outer surface of the ball 10 is fixedly connected with a connecting plate 12. The inner surface of the pipette 1 is fixedly connected with a fixed plate 11. A second spring 13 is fixedly connected between the opposite outer surfaces of the fixed plate 11 and the connecting plate 12. In this embodiment, the pull rod 8 drives the U-shaped frame 6, so that the push rod 14 pushes the ball 10 upward, and the connecting plate 12 squeezes the second spring 13, causing the second spring 13 to be compressed, thereby causing the ball 10 to detach from the inside of the conical tube 9, making the conical tube 9 conductive, and under the adsorption force of the pipette gun, the liquid passes through the conical tube 9 into the pipette 1. After the absorption is completed, the pull rod 8 is loosened, and the second spring 13 drives the ball 10 to block the conical tube 9, thereby avoiding the situation where the liquid may flow back during the pipetting process.

[0023] The two curved rods 7 movably penetrate the top outer surface of the pipette 1, and a sealing ring is provided at the connection between the top inner surface of the pipette 1 and the curved rod 7. In this embodiment, the sealing of the connection between the curved rod 7 and the pipette 1 is increased by the sealing ring.

[0024] The blocking block 4 is in the shape of a truncated cone with a thick top and a thin bottom. In this embodiment, the truncated cone with a thick top and a thin bottom allows the edge of the blocking block 4 to be better inserted into the tapered groove 5 when the blocking block 4 is inserted into the tapered groove 5 .

[0025] The outer surfaces of the ball 10 and the block 4 are fixedly connected with silicone pads. In this embodiment, by providing the silicone pads, the ball 10 and the conical tube 9 are sealed more tightly, and the block 4 and the conical groove 5 are sealed more tightly.

[0026] The outer surface of the fixed disk 11 is provided with a plurality of through grooves in a circumferential array. In the present embodiment, during pipetting, the liquid enters the interior of the pipette 1 through the through grooves.

[0027] The outer surface of the pipette 1 is provided with scale lines. The pipette 1 is a transparent tube. In this embodiment, the liquid inside the pipette 1 can be easily observed through the transparent tube, and the amount of the liquid inside the pipette 1 can be further observed through the scale lines.

[0028] Working principle: When the utility model is used, the pipette 1 is connected to the pipette gun. When pipetting, the range of the pipette gun is adjusted according to the volume of liquid to be absorbed. The pipette 1 is placed in the sampling tube, and the pull rod 8 is pulled upward with one hand. The pull rod 8 drives the bent rod 7, and the bent rod 7 drives the blocking block 4, so that the blocking block 4 moves upward, thereby compressing the first spring 3, and the blocking block 4 is separated from the conical groove 5, so that the adsorption force generated by the pipette gun can pass through the pipette 1, thereby generating an adsorption force to adsorb the liquid, and the pull rod 8 drives the U-shaped frame 6, so that the push rod 14 pushes the ball 10 upward , and the connecting disk 12 squeezes the second spring 13, causing the second spring 13 to be compressed, thereby causing the ball 10 to detach from the inside of the conical tube 9, making the conical tube 9 conductive, and under the adsorption force of the pipette gun, the liquid passes through the conical tube 9 into the pipette 1. After the absorption is completed, the pull rod 8 is loosened, the first spring 3 and the second spring 13 are reset, and the first spring 3 drives the blocking block 4 to close the conical groove 5, thereby preventing the liquid from seeping into the inside of the pipette gun, and the second spring 13 drives the ball 10 to block the conical tube 9, thereby preventing the liquid from refluxing during the pipetting process.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipetting device for a sampling tube, comprising a pipette (1), characterized in that: The inner surface of the pipette (1) is fixedly connected to a connecting column (2), a conical groove (5) is provided inside the connecting column (2), the top inner surface of the pipette (1) is fixedly connected to a first spring (3), the bottom outer surface of the first spring (3) is fixedly connected to a blocking block (4), the blocking block (4) is movably connected to the inside of the conical groove (5), the top outer surface of the blocking block (4) is fixedly connected to two bent rods (7), and the outer surfaces of the two bent rods (7) are fixedly connected to pull rods (8).

2. A liquid transfer device for a sampling tube according to claim 1, characterized in that: The bottom outer surface of the pipette (1) is fixedly connected to a conical tube (9), the interior of the conical tube (9) is movably connected to a sphere (10), the outer surface of the pull rod (8) is fixedly connected to a U-shaped frame (6), the bottom outer surface of the sphere (10) is fixedly connected to a push rod (14), the bottom outer surface of the push rod (14) is fixedly connected to the upper outer surface of the bottom end of the U-shaped frame (6), the top outer surface of the sphere (10) is fixedly connected to a connecting plate (12), the inner surface of the pipette (1) is fixedly connected to a fixed plate (11), and a second spring (13) is fixedly connected between the opposite outer surfaces of the fixed plate (11) and the connecting plate (12).

3. A liquid transfer device for a sampling tube according to claim 1, characterized in that: The two curved rods (7) movably penetrate the top outer surface of the pipette (1), and a sealing ring is provided at the connection between the top inner surface of the pipette (1) and the curved rods (7).

4. A liquid transfer device for a sampling tube according to claim 1, characterized in that: The blocking block (4) is in the shape of a truncated cone with a thick upper portion and a thin lower portion.

5. A liquid transfer device for a sampling tube according to claim 2, characterized in that: The outer surfaces of the sphere (10) and the blocking block (4) are both fixedly connected with a silicone pad.

6. A liquid transfer device for a sampling tube according to claim 2, characterized in that: The outer surface of the fixed disk (11) is provided with a plurality of through grooves in a circumferential array.

7. A liquid transfer device for a sampling tube according to claim 1, characterized in that: The outer surface of the pipette (1) is provided with scale lines, and the pipette (1) is a transparent tube.

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