A sample pipette tip

Abstract

The utility model discloses a sample pipette tip, which relates to a liquid taking device, and is intended to solve the problem of the sample remaining in the pipette tip splashing and causing pollution when the pipette tip is pulled out. The key points of the technical solution are: it includes a mounting part and a liquid storage part, the mounting part is provided with a mounting port, a plurality of connecting pieces are arranged circumferentially on the edge of the mounting port, a sealing piece for closing the mounting port is arranged obliquely on the connecting piece, and adjacent sealing pieces are mutually conflicting in a natural state, the liquid storage part is provided with a liquid suction port, an elastic band is arranged on the outer wall of the liquid storage part, and a tube sleeve is rotatably connected to the elastic band. The utility model realizes the closure of the liquid suction port through the tube sleeve, and the automatic resetting of the sealing piece after the sample pipette tip is pulled out, so as to realize the closure of the mounting port. When the sample pipette tip is pulled out from the pipette gun, it can prevent the sample in the liquid storage cavity from splashing out from the mounting port and the liquid suction port, thereby avoiding pollution, and the mounting part and the liquid storage part are made of PVC material, which has high strength and corrosion resistance and long service life.

Description

Technical Field

[0001] The utility model relates to a liquid taking device, more specifically, it relates to a sample suction head. Background Art

[0002] As a disposable consumable, the sample tip is used in any molecular biology and genetic research application. It effectively forms a protective structure between the pipette and the sample to ensure the safety of sample aspiration and sample separation.

[0003] A Chinese patent with publication number CN214514670U discloses a pipette tip, the technical key points of which are: comprising a mounting portion docked with the pipette, a filter portion docked with the mounting portion and a liquid storage portion connected to the filter portion, the mounting portion comprising a guide area for guiding the installation direction of the pipette, and a matching area connected to the guide area and engaged with the pipette, the guide area is provided with a first protrusion for engaging with the pipette to fix the pipette tip on the pipette, wherein the guide area has an opening, which makes it easier to insert the pipette into the pipette tip and easy to align, thereby improving experimental efficiency.

[0004] However, after use, since there is a sample remaining in the tip, when the tip is pulled out from the pipette gun, if too much force is used, the sample remaining in the tip will splash out of the tip, which is likely to cause contamination. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a sample pipette tip that can prevent sample splashing and avoid contamination.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a sample pipette tip, comprising a mounting portion and a liquid storage portion, the mounting portion is provided with a mounting opening, a plurality of connecting pieces are circumferentially arranged at the edge of the mounting opening, a sealing piece for closing the mounting opening is obliquely arranged on the connecting piece, the connecting piece and the sealing piece are both made of rubber material, and adjacent sealing pieces are in contact with each other in a natural state, the liquid storage portion is provided with a liquid suction port, an elastic band is arranged on the outer side wall of the liquid storage portion, and a tube sleeve for closing the liquid suction port is rotatably connected to the elastic band.

[0007] The utility model is further configured as follows: a clamping groove is vertically opened on the inner side wall of the tube sleeve, an arc groove is circumferentially opened on the inner side wall of the tube sleeve, the clamping groove and the arc groove are connected to each other, and a clamping block for sequentially clamping into the clamping groove and the arc groove is arranged on the outer side wall of the liquid storage part.

[0008] The utility model is further configured as follows: a sliding groove is circumferentially provided on the outer wall of the tube sleeve, and a circular ring slidably connected in the sliding groove is provided at one end of the elastic band away from the liquid storage portion.

[0009] The utility model is further configured as follows: an embedding block is arranged on the outer wall of the liquid storage part, an embedding groove for embedding the embedding block is provided on the pipe sleeve, a convex ring is arranged on the inner wall of the embedding groove, a limiting groove for the convex ring to be clamped is provided on the embedding block, and the convex ring is elastic.

[0010] The utility model is further configured as follows: a soft plug for embedding into the liquid suction port is arranged on the inner bottom wall of the tube sleeve.

[0011] The utility model is further configured as follows: a lifting piece is arranged on the outer side wall of the mounting portion.

[0012] The utility model is further configured as follows: the cross section of the connecting piece is arc-shaped.

[0013] The utility model is further configured as follows: the installation part and the liquid storage part are both made of PVC material.

[0014] In summary, the utility model has the following beneficial effects: the utility model achieves closure of the liquid aspiration port through the tube sleeve, and the sealing piece automatically resets after the sample pipette tip is pulled out, thereby achieving closure of the mounting port. When the sample pipette tip is pulled out from the pipette gun, it can effectively prevent the sample in the liquid storage cavity from splashing out from the mounting port and the liquid aspiration port, thereby avoiding contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 for Figure 1 The enlarged schematic diagram of the middle A part;

[0018] Figure 4 for Figure 1 The enlarged schematic diagram of the middle B part;

[0019] Figure 5 for Figure 1 The enlarged schematic diagram of the middle C part;

[0020] Figure 6 It is a structural schematic diagram of the pipe sleeve in the utility model.

[0021] In the figure: 1. installation part; 2. liquid storage part; 3. installation port; 4. connecting piece; 5. sealing piece; 6. liquid suction port; 7. elastic band; 8. pipe sleeve; 9. slot; 10. arc groove; 11. block; 12. slide groove; 13. circular ring; 14. embedded block; 15. embedded groove; 16. convex ring; 17. limit groove; 18. soft plug; 19. lifting piece. DETAILED DESCRIPTION

[0022] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] See also Figure 1 , Figure 2 , Figure 3 As shown, a sample pipette tip comprises a mounting portion 1 and a liquid storage portion 2, a mounting port 3 is provided on the mounting portion 1, a plurality of connecting pieces 4 are circumferentially arranged at the edge of the mounting port 3, a sealing piece 5 for closing the mounting port 3 is obliquely arranged on the connecting piece 4, and the connecting piece 4 and the sealing piece 5 are both made of rubber material, and adjacent sealing pieces 5 are in contact with each other in a natural state, a liquid suction port 6 is provided on the liquid storage portion 2, an elastic band 7 is provided on the outer side wall of the liquid storage portion 2, a tube sleeve 8 for closing the liquid suction port 6 is rotatably connected to the elastic band 7, when used in conjunction with a pipette gun, the sample pipette tip is first installed on the pipette gun so that the front end of the pipette gun is inserted into the mounting port 3 until it contacts the sealing piece 5, and force is continued to be applied, so that the sealing piece 5 is squeezed by the front end of the pipette gun, forcing the connecting piece 4 to deform, driving the sealing piece 5 toward the mounting port 3. The inner wall direction of the mounting part 1 is deflected, so that the sealing pieces 5 that conflict with each other are separated, so that the mounting part 1 remains unobstructed, and then the tube sleeve 8 used to seal the liquid suction port 6 is opened, and the pipetting operation can be carried out. After the operation is completed, before the sample pipette tip is pulled out from the pipette gun, the liquid suction port 6 is first sealed with the tube sleeve 8, and then the pipette tip is pulled out from the pipette gun with force. At the moment when the front end of the pipette gun escapes from the mounting port 3, the squeezing force of the front end of the pipette gun on the sealing piece 5 is cancelled, and the connecting piece 4 is deformed and reset, driving the sealing piece 5 to automatically reset until the adjacent sealing pieces 5 conflict with each other, isolating the mounting part 1 from the outside world, and realizing the closure of the mounting port 3, so that when the sample pipette tip is pulled out from the pipette gun, it can effectively prevent the sample in the liquid storage cavity from splashing out from the mounting port 3 and the liquid suction port 6, thereby avoiding contamination.

[0024] See also Figure 3 , Figure 5As shown, a card slot 9 is vertically opened on the inner wall of the tube sleeve 8, and an arc groove 10 is circumferentially opened on the inner wall of the tube sleeve 8, and the card slot 9 and the arc groove 10 are connected to each other. A card block 11 for sequentially inserting into the card slot 9 and the arc groove 10 is arranged on the outer wall of the liquid storage part 2. When the tube sleeve 8 is used to close the liquid suction port 6, the card block 11 is aligned with the card slot 9, so that the bottom of the liquid storage part 2 is inserted into the tube sleeve 8, and the card block 11 is inserted into the card slot 9 until the card block 11 moves to the connecting position of the card slot 9 and the arc groove 10, and the tube sleeve 8 is screwed so that the card block 11 is inserted from the card slot 9 into the arc groove 10. The locking of the tube sleeve 8 is realized by limiting the card block 11 by the arc groove 10, so that the tube sleeve 8 is firmly fixed in the liquid storage. When the pipette port 6 needs to be opened, the sleeve 8 only needs to be twisted to make the block 11 come out of the arc groove 10. The limit of the block 11 by the arc groove 10 is released, and the block 11 falls into the groove 9. The sleeve 8 is pulled out in the direction away from the liquid storage part 2 until the block 11 comes out of the groove 9. The sleeve 8 can be separated from the liquid storage part 2 to realize the operation of opening the pipette port 6, which is convenient and quick. A soft plug 18 for embedding the pipette port 6 is provided on the inner bottom wall of the sleeve 8. When the bottom of the liquid storage part 2 is embedded in the sleeve 8, the soft plug 18 is embedded in the pipette port 6 accordingly, thereby blocking the pipette port 6, so that the sample in the liquid storage part will not flow into the sleeve 8, thereby further improving the sealing of the pipette port 6.

[0025] See also Figure 1 , Figure 4 , Figure 6 As shown, a slide groove 12 is opened circumferentially on the outer wall of the tube sleeve 8, and a ring 13 slidably connected to the slide groove 12 is arranged at the end of the elastic band 7 away from the liquid storage part 2. During the process of screwing the tube sleeve 8, the ring 13 slides in the slide groove 12. The slide groove 12 limits and guides the ring 13, so that the sliding of the ring 13 in the slide groove 12 is relatively smooth, thereby making the operation of screwing the tube sleeve 8 relatively smooth. An embedded block 14 is arranged on the outer wall of the liquid storage part 2, and an embedded groove 15 for embedding the embedded block 14 is opened on the tube sleeve 8. A convex ring 16 is arranged on the inner wall of the embedded groove 15. A limiting groove 17 for the convex ring 16 to be clamped is opened on the embedded block 14, and the convex ring 16 is elastic. After opening the tube sleeve 8, The elastic band 7 is folded upward, driving the tube sleeve 8 to be lifted upward, pressing the tube sleeve 8 toward the liquid storage part 2, so that the embedded block 14 is aligned with the embedded groove 15 and embedded until the embedded block 14 contacts the convex ring 16, and the force is continued to be applied. The convex ring 16 is deformed and compressed by the force, and the embedded block 14 can continue to be embedded until the embedded block 14 is completely embedded in the embedded groove 15, and the convex ring 16 is then stuck in the limiting groove 17. The convex ring 16 is deformed and rebounds and contacts the inner wall of the limiting groove 17. The limiting groove 17 limits the convex ring 16 to achieve the locking of the tube sleeve 8, so that the tube sleeve 8 is firmly fixed on the outer wall of the liquid storage part 2. When the sample pipette tip is used to absorb the sample, the tube sleeve 8 can be prevented from being immersed in the sample solution, thereby avoiding contamination of the tube sleeve 8.

[0026] See also Figure 1 As shown, a lifting piece 19 is provided on the outer wall of the mounting portion 1. When the sample tip is pulled out from the pipette, the lifting piece 19 is held by hand. The lifting piece 19 serves as a fulcrum, which makes it easier to apply force and is not easy to slip during the process of pulling out the sample tip, making it more convenient to pull the sample tip out of the pipette. The cross-section of the connecting piece 4 is arc-shaped. When the front end of the pipette is inserted into the mounting portion 1, the arc-shaped surface of the connecting piece 4 can guide the insertion of the pipette, making the insertion of the pipette smoother, thereby making the operation of installing the tip on the pipette smoother. The mounting portion 1 and the liquid storage portion 2 are both made of PVC material. The PVC material has the characteristics of high strength and corrosion resistance, so that the mounting portion 1 and the liquid storage portion 2 have a long service life.

[0027] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A sample pipette tip, comprising a mounting portion (1) and a liquid storage portion (2), characterized in that: The mounting portion (1) is provided with a mounting opening (3), a plurality of connecting pieces (4) are arranged circumferentially around the edge of the mounting opening (3), a sealing piece (5) for closing the mounting opening (3) is obliquely arranged on the connecting piece (4), the connecting piece (4) and the sealing piece (5) are both made of rubber material, and adjacent sealing pieces (5) are in contact with each other in a natural state, the liquid storage portion (2) is provided with a liquid suction opening (6), an elastic band (7) is arranged on the outer side wall of the liquid storage portion (2), and a pipe sleeve (8) for closing the liquid suction opening (6) is rotatably connected to the elastic band (7).

2. A sample pipette tip according to claim 1, characterized in that: A clamping groove (9) is vertically provided on the inner side wall of the tube sleeve (8), an arc-shaped groove (10) is circumferentially provided on the inner side wall of the tube sleeve (8), the clamping groove (9) and the arc-shaped groove (10) are communicated with each other, and a clamping block (11) for sequentially clamping into the clamping groove (9) and the arc-shaped groove (10) is provided on the outer side wall of the liquid storage portion (2).

3. A sample pipette tip according to claim 1, characterized in that: A sliding groove (12) is circumferentially provided on the outer wall of the tube sleeve (8), and a circular ring (13) slidably connected to the sliding groove (12) is provided at one end of the elastic band (7) away from the liquid storage portion (2).

4. A sample pipette tip according to claim 1, characterized in that: An insert (14) is arranged on the outer wall of the liquid storage portion (2); an insert groove (15) is provided on the pipe sleeve (8) for inserting the insert (14); a convex ring (16) is arranged on the inner wall of the insert groove (15); a limiting groove (17) is provided on the insert (14) for the convex ring (16) to be inserted; and the convex ring (16) is elastic.

5. A sample pipette tip according to claim 1, characterized in that: A soft plug (18) for embedding in the liquid suction port (6) is arranged on the inner bottom wall of the tube sleeve (8).

6. A sample pipette tip according to claim 1, characterized in that: A lifting piece (19) is provided on the outer side wall of the mounting portion (1).

7. A sample pipette tip according to claim 1, characterized in that: The cross section of the connecting piece (4) is arc-shaped.

8. A sample pipette tip according to claim 1, characterized in that: The installation part (1) and the liquid storage part (2) are both made of PVC material.

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