Pipettor convenient for absorbing liquid

Abstract

The pipettor comprises a pipettor body, a sealing ring is arranged on the surface of the inner wall of the lower portion of the pipettor body, a second connecting pipe is arranged on the inner side of the middle of the sealing ring, a conical suction head is arranged on the surface of the bottom of the second connecting pipe, and a positioning ring is arranged on the surface of the outer side of the sealing ring. A top cover is arranged at the top of the pipettor body, a communicating pipe is arranged on the inner side of the middle of the top cover, a first connecting pipe is arranged on the inner wall of the communicating pipe, an air bag is arranged at the top end of the first connecting pipe, an air suction port is formed in the middle of the top of the air bag, and limiting plates are arranged on the surfaces of the two sides of the exterior of the top cover. A dial is arranged on the surface of one side of the outer portion of the pipettor body, through the arranged conical suction head, large negative pressure can be generated, liquid is sucked more effectively, the shape of the conical suction head is beneficial to concentration of force at one point, the suction action is more efficient, the sucked liquid amount can be accurately controlled, and splashing and overflowing of the liquid are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipettes, in particular to a pipette facilitating liquid suction. Background Art

[0002] A pipette, also called a pipetting gun, is a metering tool that transfers liquid from an original container to another container within a certain range of measuring ranges, and is widely used in fields such as biology and chemistry.

[0003] During the liquid suction process of existing pipettes, the negative pressure is relatively low, and the liquid suction efficiency is also relatively low, making it impossible to quickly and effectively suck the liquid. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pipette facilitating liquid suction, which can solve the problem that the negative pressure of existing pipettes is relatively low during the liquid suction process, resulting in relatively low liquid suction efficiency, and can quickly and effectively suck the liquid.

[0005] To achieve the above purpose, a pipette facilitating liquid suction is provided, including a pipette body. A sealing ring is arranged on the inner wall surface of the lower part of the pipette body. A second connecting pipe is arranged inside the middle of the sealing ring. A conical suction head is arranged on the bottom surface of the second connecting pipe. A positioning ring is arranged on the outer surface of the sealing ring. A top cover is arranged on the top of the pipette body. A communicating pipe is arranged inside the middle of the top cover. A first connecting pipe is arranged on the inner wall of the communicating pipe. An airbag is arranged at the top end of the first connecting pipe. Limited holding plates are arranged on both outer surfaces of the top cover. A scale disk is arranged on one outer surface of the pipette body.

[0006] According to the pipette facilitating liquid suction, the sealing ring is made of rubber material, and the sealing ring forms a snap-fit and sealed connection with the inner wall surface of the lower part of the pipette body. The outer surface of the sealing ring is fixedly connected with the positioning ring, and the positioning ring forms a contact connection with the bottom surface of the pipette body through a rubber ring sealing ring.

[0007] According to the pipette facilitating liquid suction, the second connecting pipe is made of polytetrafluoroethylene material, and the second connecting pipe forms a threaded and sealed contact connection with the inside of the middle of the sealing ring. The conical suction head is usually made of polypropylene or similar corrosion-resistant and non-toxic materials, and the conical suction head forms a communicating effect with the inside of the pipette body through a fixed connection with the bottom surface of the second connecting pipe.

[0008] According to the pipette facilitating liquid suction, the top cover is made of polypropylene material, and the top cover is fixedly and sealedly connected with the top of the pipette body. The communicating pipe is made of polytetrafluoroethylene material, and the communicating pipe is fixedly and sealedly connected with the inside of the middle of the top cover.

[0009] According to the pipette facilitating liquid suction described above, the first connecting tube is made of polytetrafluoroethylene, and the first connecting tube is snap-fitted and hermetically connected to the inner wall of the communicating tube.

[0010] According to the pipette facilitating liquid suction described above, the airbag is made of silica gel, and the airbag forms a supporting contact effect with the upper surface above the top cover through the fixed connection at the top end of the first connecting tube.

[0011] According to the pipette facilitating liquid suction described above, there are two holding limit plates, and both of the two holding limit plates are fixedly in contact with the outer surfaces on both sides of the top cover.

[0012] According to the pipette facilitating liquid suction described above, the pipette body is made of transparent glass, and the scale dial is fixedly in contact with the outer surface on one side of the pipette body.

[0013] The beneficial effects of the above solution: By setting the conical suction head, a larger negative pressure can be generated, so as to more effectively suck the liquid. Its shape helps to concentrate the force at one point, making the sucking action more efficient, and can also accurately control the amount of liquid sucked, reducing the splashing and overflow of the liquid.

[0014] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a pipette facilitating liquid suction of the present utility model;

[0016] Figure 2 It is a structural sectional view of a pipette facilitating liquid suction of the present utility model;

[0017] Figure 3 It is a side view of a pipette facilitating liquid suction of the present utility model.

[0018] LEGEND DESCRIPTION:

[0019] 1. Pipette body; 2. Top cover; 3. Holding limit plate; 4. Airbag; 5. Positioning ring; 6. Scale dial; 7. Conical suction head; 8. Communicating tube; 9. First connecting tube; 10. Sealing ring; 11. Second connecting tube. DETAILED DESCRIPTION OF THE INVENTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Referring to Figures 1-3 , a pipette facilitating liquid suction in an embodiment of the present invention includes a pipette body 1. A sealing ring 10 is provided on the inner wall surface below the pipette body 1. A second connecting pipe 11 is provided inside the middle of the sealing ring 10. A conical suction head 7 is provided on the bottom surface of the second connecting pipe 11. A positioning ring 5 is provided on the outer surface of the sealing ring 10. A top cover 2 is provided on the top of the pipette body 1. A communicating pipe 8 is provided inside the middle of the top cover 2. A first connecting pipe 9 is provided on the inner wall of the communicating pipe 8. An airbag 4 is provided at the top end of the first connecting pipe 9. Limited holding plates 3 are provided on both outer side surfaces of the top cover 2. A scale disk 6 is provided on one outer side surface of the pipette body 1.

[0022] The sealing ring 10 is made of rubber. The sealing ring 10 forms a snap-fit and sealed connection with the inner wall surface of the lower part of the pipette body 1. The outer surface of the sealing ring 10 is fixedly connected to the positioning ring 5. The positioning ring 5 forms a contact connection with the bottom surface of the pipette body 1 through the rubber ring sealing ring 10. By providing the sealing ring 10, a sealed state can be provided when the second connecting pipe 11 and the conical tip 7 are connected to the inside of the lower part of the pipette body 1. By providing the positioning ring 5, it is convenient for the sealing ring 10 to reach a sealed or disengaged state with the inner wall of the lower part of the pipette body 1, facilitating the later cleaning of the inside of the pipette body 1. The second connecting pipe 11 is made of polytetrafluoroethylene. The second connecting pipe 11 forms a threaded and sealed contact connection with the inner side of the middle part of the sealing ring 10. The conical tip 7 is usually made of polypropylene or similar corrosion-resistant and non-toxic materials. The conical tip 7 is fixedly connected through the bottom surface of the second connecting pipe 11 to form a communication effect with the inside of the pipette body 1. By providing the conical tip 7, a larger negative pressure can be generated, thus more effectively sucking the liquid. Its shape helps to concentrate the force at one point, making the sucking action more efficient. The top cover 2 is made of polypropylene. The top cover 2 is fixedly and sealedly connected to the top of the pipette body 1. The connecting pipe 8 is made of polytetrafluoroethylene. The connecting pipe 8 is fixedly and sealedly connected to the inner side of the middle part of the top cover 2. The first connecting pipe 9 is made of polytetrafluoroethylene. The first connecting pipe 9 forms a snap-fit and sealed connection with the inner wall of the connecting pipe 8. By providing the first connecting pipe 9, an air pressure communication control function can be formed between the airbag 4 and the inside of the pipette body 1. The airbag 4 is made of silica gel. The airbag 4 forms a support contact effect with the upper surface of the top cover 2 through the fixed communication connection at the top of the first connecting pipe 9. By providing the airbag 4, it has good elasticity and durability and can withstand multiple pressing and loosening to form an inflation and deflation cycle. There are two holding limit plates 3. Both of the two holding limit plates 3 are fixedly in contact with the outer side surfaces of both sides of the top cover 2. By providing the holding limit plates 3, it is possible to avoid directly holding the pipette body 1, which is inconvenient for directly observing the liquid suction volume of the pipette body 1. The pipette body 1 is made of transparent glass. The scale disk 6 is fixedly in contact with the outer side surface of one side of the pipette body 1.

[0023] Working principle: Place the pulp of the index finger and middle finger under the holding limit plate 3 to hold the entire pipette body 1. At the same time, press the pulp of the thumb on the upper part of the airbag 4 and press downward on the airbag 4 to discharge the air in the airbag 4 through the first connecting pipe 9, the pipette body 1, and the conical tip 7. Then, after placing the conical tip 7 in the liquid to be aspirated, slowly release the pressure on the airbag 4, which is convenient for controlling the scale of the liquid aspiration. When the pressure inside the airbag 4 is lower than the external atmospheric pressure, the liquid will enter the inside of the pipette body 1 through the conical tip 7 under the action of the atmospheric pressure, completing the liquid aspiration process.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pipette for facilitating liquid aspiration, comprising a pipette body (1), characterized in that: A sealing ring (10) is provided on the inner wall surface below the pipette body (1), a second connecting tube (11) is provided on the inner side of the middle of the sealing ring (10), a conical suction head (7) is provided on the bottom surface of the second connecting tube (11), a positioning ring (5) is provided on the outer surface of the sealing ring (10), a top cover (2) is provided on the top of the pipette body (1), a connecting tube (8) is provided on the inner side of the middle of the top cover (2), a first connecting tube (9) is provided on the inner wall of the connecting tube (8), an air bag (4) is provided on the top end of the first connecting tube (9), limiting plates (3) are provided on both sides of the outer surface of the top cover (2), and a dial (6) is provided on one side of the outer surface of the pipette body (1).

2. A pipette for facilitating liquid aspiration according to claim 1, characterized in that: The sealing ring (10) is made of rubber material, and forms a snap-fit ​​sealing connection with the inner wall surface below the pipette body (1). The outer surface of the sealing ring (10) is fixedly connected to the positioning ring (5), and the positioning ring (5) is in contact with the bottom surface of the pipette body (1) through the rubber ring sealing ring (10).

3. A pipette for facilitating liquid aspiration according to claim 1, characterized in that: The second connecting tube (11) is made of polytetrafluoroethylene, and is connected to the inner side of the middle of the sealing ring (10) by a threaded sealing contact. The conical pipette tip (7) is usually made of polypropylene or a similar corrosion-resistant, non-toxic material. The conical pipette tip (7) is fixedly connected to the inside of the pipette body (1) through the bottom surface of the second connecting tube (11) to form a communication effect.

4. A pipette for facilitating liquid aspiration according to claim 1, characterized in that: The top cover (2) is made of polypropylene, and is fixedly and hermetically connected to the top of the pipette body (1); the connecting tube (8) is made of polytetrafluoroethylene, and is fixedly and hermetically connected to the inner side of the middle of the top cover (2).

5. A pipette for facilitating liquid aspiration according to claim 1, characterized in that: The first connecting tube (9) is made of polytetrafluoroethylene and is connected to the inner wall of the connecting tube (8) in a sealing manner by snap-fitting.

6. A pipette for facilitating liquid aspiration according to claim 1, characterized in that: The airbag (4) is made of silicone material, and the airbag (4) is fixedly connected to the upper surface of the top cover (2) through the top of the first connecting tube (9) to form a supporting contact effect.

7. A pipette for facilitating liquid aspiration according to claim 1, characterized in that: Two limiting plates (3) are provided, and both limiting plates (3) are fixedly contacted and connected to the outer two side surfaces of the top cover (2).

8. A pipette for facilitating liquid aspiration according to claim 1, characterized in that: The pipette body (1) is made of transparent glass, and the scale plate (6) is fixedly contacted and connected to a surface of one side of the outside of the pipette body (1).

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