Substitution gun head adaptive to pipettors of various specifications

Abstract

The utility model discloses a substitute gun head adapted to pipettors of various specifications, which comprises a pipettor connecting area, the top of the pipettor connecting area is in an open state, at least two communicated accommodating cavities are arranged in the pipettor connecting area, the diameters of the accommodating cavities are sequentially reduced along the vertical downward direction, and limiting parts are formed at the joints of the adjacent accommodating cavities; the liquid storage area is communicated with the pipettor connecting area; the liquid suction area is located below the liquid storage area, the diameter of the liquid suction area is smaller than that of the liquid storage area, and the liquid suction area is communicated with the liquid storage area through an arc-shaped transition area. The substitute gun head is simple in structure, convenient to operate and capable of meeting various experiment requirements, wide-range liquid suction is met, meanwhile, the accuracy of small-range liquid suction can be guaranteed, and the accuracy and efficiency of experiment operation are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to laboratory equipment technical field especially relates to a kind of replacement gun head of adaptation multiple specifications pipette. BACKGROUND

[0002] Pipette is usually used to remove a small amount or trace amount of liquid, belongs to precision instrument, and it is widely used in biological research, gene and protein research, drug development and other biotechnology field, and the replacement gun head of pipette matched therewith also belongs to consumable with huge consumption amount.The traditional replacement gun head of pipette is single function, needs multiple specifications replacement gun head of pipette to be used mixed when coping with different experimental needs, to cause low operation efficiency, time-consuming and labor-consuming, precision decline, increase the risk of cross contamination etc.Problems.This process not only cannot avoid the resource waste of traditional replacement gun head of pipette, but also makes experimenter to cause confusion when using pipette because of different replacement gun head of pipette on desktop, and multiple specifications replacement gun head of pipette coexist makes storage management and procurement work more complex, invisibly cause huge resource waste.

[0003] Therefore, it is necessary to design a replacement gun head of adaptation multiple specifications pipette to solve the above problems. SUMMARY

[0004] The utility model aims at providing a kind of replacement gun head of adaptation multiple specifications pipette, which can solve the problems of single function and complicated operation of existing replacement gun head, improve sampling efficiency and avoid cross infection, and improve experimental operation efficiency.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of replacement gun head of adaptation multiple specifications pipette, comprising:

[0007] Pipette connecting area, the top of pipette connecting area is open, and at least two communicating cavities are provided in the interior of pipette connecting area, which are sequentially reduced in diameter along the vertical downward direction, so that a limiting portion is formed at the connecting position of adjacent cavities;

[0008] Liquid storage area, which is in communication with the pipette connecting area;

[0009] Liquid suction area, located below the liquid storage area, the diameter of the liquid suction area is smaller than that of the liquid storage area, and the liquid suction area is in communication with the liquid storage area through an arc transition area.

[0010] As a further improvement of the utility model, three communicating cavities are provided in the pipette connecting area.

[0011] As a further improvement of the utility model, scale lines indicating the amount of liquid suction are further provided on the liquid storage area and the liquid suction area.

[0012] As a further improvement of the utility model, the liquid storage area and the pipette connecting area are further provided with a suction protection area.

[0013] As a further improvement of the utility model, the diameters of the liquid storage area and the liquid suction area gradually decrease in the vertical downward direction.

[0014] As a further improvement of the utility model, the pipette connecting area is further provided with a ring body with a gradually increasing diameter away from the liquid storage area.

[0015] As a further improvement of the utility model, the ring body is arcuately connected to the end of the pipette connecting area away from the liquid storage area.

[0016] As a further improvement of the utility model, the outer periphery of the pipette connecting area is further provided with positioning members for facilitating the insertion and fixation of the replacement gun head into the gun head box.

[0017] As a further improvement of the utility model, the positioning members include a plurality of prisms arranged along the circumference of the pipette connecting area.

[0018] As a further improvement of the utility model, one end of the prisms extends to the ring body.

[0019] The utility model has the advantages of:

[0020] 1. The utility model sets at least two cavities with gradually decreasing diameters in the vertical downward direction in the pipette connecting area, so that the pipette connecting area can be adapted to various pipettes; at the same time, the diameter of the liquid suction area is smaller than that of the liquid storage area, and an arc-shaped transition area is arranged between the liquid suction area and the liquid storage area, so that the replacement gun head can meet the requirements of large-range liquid suction and ensure the accuracy of small-range liquid suction.

[0021] 2. The replacement gun head of the utility model has simple structure and convenient operation, can meet various experimental requirements, improve the accuracy and efficiency of experimental operation, and is widely used in liquid sampling and transfer in the fields of biological experiments, chemical analysis, environmental monitoring, etc. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an overall structure diagram of the replacement gun head of the utility model adapted to various specifications of pipettes.

[0023] Figure 2 It is an internal diagram of the pipette connecting area.

[0024] Figure 3 It is a diagram showing the connection between the pipette and the replacement gun head.

[0025] Figure 4Figure 1 is a schematic diagram of a pipette tip and a telescopic push rod connected to a replacement gun head for different specifications of pipettes.

[0026] Reference numerals

[0027] 10, pipette connection area; 11, first cavity; 12, second cavity; 13, third cavity; 14, first limiting portion; 15, second limiting portion; 20, liquid storage area; 21, 1000 μL scale line; 22, 200 μL scale line; 23, 10 μL scale line; 30, liquid suction area; 31, arc-shaped transition area; 40, ring body; 50, prism; 60, pipette; 61, pipette tip; 62, telescopic push rod. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be described in detail below with reference to the drawings and specific embodiments.

[0029] Here, it also needs to be explained that, in order to avoid obscuring the present application due to unnecessary details, only the structures and / or processing steps closely related to the scheme of the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0030] In addition, it also needs to be explained that the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0031] Please refer to Figures 1-4 The present application provides a replacement gun head suitable for multiple specifications of pipettes, comprising:

[0032] The pipette connection area 10 has an open top, and at least two communicating cavities are arranged in the pipette connection area 10, which are arranged in a vertical downward direction and have diameters decreasing in sequence, so that a limiting portion is formed at the connection of adjacent cavities;

[0033] The liquid storage area 20 is in communication with the pipette connection area 10.

[0034] The liquid suction area 30 is located below the liquid storage area 20, and the diameter of the liquid suction area 30 is smaller than that of the liquid storage area 20, and the liquid suction area 30 is in communication with the liquid storage area 20 through the arc-shaped transition area 31.

[0035] For example, Figure 2As shown, three communicating cavities are arranged in the pipette connecting area 10, including the first cavity 11, the second cavity 12 and the third cavity 13 connected in sequence in the vertical downward direction, and the diameters of the three cavities decrease in sequence in the vertical downward direction, so that the first limiting part 14 is formed between the first cavity 11 and the second cavity 12, and the second limiting part 15 is formed between the second cavity 12 and the third cavity 13. By arranging three cavities with different diameters in the pipette connecting area 10 and forming limiting parts, the pipette connecting area 10 can be adapted to three different specifications of pipettes 60, thereby solving the problems of the existing substitute tip that can only be adapted to a single pipette 60, single function, affecting operation efficiency and the like.

[0036] In use, the pipette 60 is generally arranged such that the end of the tip 61 on the pipette 60 is clamped in the cavity at the top of the gun head, and one end of the telescopic push rod 62 arranged around the outer periphery of the tip 61 falls on the top surface of the gun head. After the liquid suction operation is completed, the gun head is pushed out of the pipette 60 by the telescopic push rod 62. The present application can make the end of the tip 61 and the end of the telescopic push rod 62 of pipettes 60 of different specifications fall on the first cavity 11 and the top surface of the pipette connecting area 10, the second cavity 12 and the top surface of the pipette connecting area 10, or the third cavity 13 and the top surface of the pipette connecting area 10, respectively, so that the substitute tip can be adapted to pipettes 60 of multiple specifications, improve the application range of the substitute tip, and improve the convenience of experimental operation. The size of the pipette connecting area 10 can be designed according to actual conditions, so that the pipette connecting area 10 can be adapted to the tip 61 and the telescopic push rod 62 of the large-range pipette, the medium-range pipette and the small-range pipette, respectively. Figure 4 The connection schematic diagram of different range pipettes connected with the substitute tip is shown in FIGS. 8a-8c. Figure 4 a is a connection schematic diagram of a large-range pipette and the substitute tip, the end of the tip 61 and the end of the telescopic push rod 62 of the large-range pipette are located in the first cavity 11 and the top surface of the pipette connecting area 10 of the substitute tip, respectively; Figure 4 b is a connection schematic diagram of a medium-range pipette and the substitute tip, the tip 61 of the medium-range pipette passes through the first cavity 11 to the second cavity 12, so that the end of the tip 61 and the end of the telescopic push rod 62 are located in the second cavity 12 and the top surface of the pipette connecting area 10 of the substitute tip, respectively; Figure 4c is a schematic diagram of the connection of the small range pipette and the adapter tip, the tip of the small range pipette passes through the first cavity 11 and the second cavity 12 to the third cavity 13 in sequence, so that the end of the tip 61 and the end of the telescopic push rod 62 are located on the third cavity 13 of the adapter tip and the top surface of the pipette connecting area 10 respectively. In this example, the first limiting part 14 and the second limiting part 15 are both limiting members for limiting the insertion depth of the tip 61, so that the adapter tip is adapted to different range pipettes. In other embodiments, according to the specifications of the adapted different range pipettes, the first limiting part 14 and the second limiting part 15 can also be provided as receiving members for receiving the end of the telescopic push rod 62.

[0037] In this example, the large range pipette, the medium range pipette and the small range pipette are respectively 1000 μL pipette, 200 μL pipette and 10 μL pipette.

[0038] The liquid storage area 20 and the liquid suction area 30 are also provided with scale lines indicating the amount of liquid suction, including 1000 μL scale line 21, 200 μL scale line 22 and 10 μL scale line 23 marked in the vertical downward direction in sequence, wherein the 1000 μL scale line 21 and the 200 μL scale line 22 are located in the liquid storage area 20, and the 10 μL scale line 23 is located in the liquid suction area 30.

[0039] For example, a suction protection area is also provided between the liquid storage area 20 and the pipette connecting area 10 to reduce the probability of liquid being sucked into the tip 61 of the pipette 60 due to improper operation during experimental operation.

[0040] Specifically, in the vertical downward direction, the diameters of the liquid storage area 20 and the liquid suction area 30 gradually decrease.

[0041] The setting that the diameter of the liquid suction area 30 is smaller than the diameter of the liquid storage area 20 can be adapted to the multi-cavity setting of the pipette connecting area 10, which can avoid affecting the precision of small range suction when the adapter tip is used for small range pipette 60 due to the too large diameter of the liquid suction area 30, that is, the adapter tip can meet the needs of large range liquid suction and also ensure the accuracy of small range liquid suction.

[0042] In addition, by providing the arc-shaped transition area 31 between the liquid suction area 30 and the liquid storage area 20, the smoothness of liquid flowing between the liquid suction area 30 and the liquid storage area 20 can be improved, and the probability of generating bubbles during the liquid suction process can be reduced.

[0043] Specifically, the ring body 40 gradually increases in diameter in the direction away from the liquid storage area 20, and the ring body 40 is arc-shapedly connected to the end of the pipette connecting area 10 away from the liquid storage area 20. The setting of the ring body 40 is more conducive to the pipette 60 to take the adapter tip.

[0044] Specifically, the periphery of the pipette connecting area 10 is further provided with positioning members for facilitating insertion and fixation of the replacement tip into the tip box. Exemplarily, the positioning members include a plurality of prisms 50 circumferentially spaced apart along the pipette connecting area 10, and one end of each prism 50 extends to the ring body 40. The provision of the plurality of prisms 50 can provide good support for the insertion of the replacement tip into the tip box, and the prisms 50 can also increase the strength of the pipette connecting area 10.

[0045] Specifically, the pipette connecting area 10, the liquid storage area 20, the arc-shaped transition area 31 and the liquid suction area 30 are integrally formed.

[0046] Specifically, the material of the replacement tip is polypropylene.

[0047] The above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A replacement pipette tip adaptable to various sizes of pipettes, characterized in that, The application relates to a pipette connecting area, which is open at the top and is internally provided with at least two communicating cavities which are sequentially reduced in diameter in a vertically downward direction, so that a limiting part is formed at the connecting part of the adjacent cavities. A liquid storage area is connected with the pipette connecting area. A liquid suction area is located below the liquid storage area, the diameter of the liquid suction area is smaller than that of the liquid storage area, and the liquid suction area is connected with the liquid storage area through an arc-shaped transition area. The pipette connecting area is internally provided with three communicating cavities.

2. The replacement tip for adapting multiple-gauge pipettors of claim 1, wherein: Scale lines for indicating the liquid suction amount are further arranged on the liquid storage area and the liquid suction area.

3. The universal replacement tip for a pipettor of claim 1, wherein: A liquid suction protection area is further arranged between the liquid storage area and the pipette connecting area.

4. The universal replacement tip for a pipettor of claim 1, wherein: In a vertically downward direction, the diameters of the liquid storage area and the liquid suction area are gradually reduced.

5. The universal replacement tip for a pipettor of claim 1, wherein: An annular body is further arranged at the end of the pipette connecting area away from the liquid storage area, and the diameter of the annular body is gradually increased in a direction away from the liquid storage area.

6. The universal replacement tip for a pipettor of claim 1, wherein: The annular body is arc-shapedly connected with the end of the pipette connecting area away from the liquid storage area.

7. The replacement tip for adapting multiple-gauge pipettors of claim 6, wherein: Positioning members are further arranged on the periphery of the pipette connecting area, which are convenient for inserting and fixing the spare gun head into the gun head box.

8. The universal pipette tip adaptor of claim 6, wherein: The positioning members comprise a plurality of prisms which are arranged in a circumferential direction and are spaced apart.

9. The replacement tip for adapting multiple-gauge pipettors of claim 8, wherein: One end of the prisms extends to the annular body.

10. The replacement tip for adapting multiple-gauge pipettors of claim 9, wherein: ​

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