Novel quantitative dropper

Abstract

The utility model relates to the technical field of experimental instruments, in particular to a novel quantitative dropper which comprises a dropper body, an air bag and a drip nozzle, the dropper body comprises an inner tube and an outer tube, the upper end of the outer tube extends into the air bag, and the lower portion of the inner tube is connected with the upper end of the drip nozzle in a sealed mode. The upper portion of the inner pipe is arranged in the outer pipe, the lower end of the outer pipe is connected with the lower end or the lower portion of the inner pipe in a sealed mode, an inner liquid storage cavity is formed in the inner pipe, an outer liquid storage cavity is formed between the outer portion of the inner pipe and the inner portion of the outer pipe, and a through hole communicating the inner liquid storage cavity with the outer liquid storage cavity is formed in the inner pipe. According to the technical scheme, the novel quantitative dropper is simple in structure, reasonable in design and capable of accurately dropwise adding or transferring liquid, and therefore experiment accuracy is guaranteed. The specific quantitative amount is completely determined by the volume of the inner tube, and meanwhile, the dropper also retains all functions of the conventional common dropper.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental instruments, in particular to a novel quantitative dropper. Background Art

[0002] As a common laboratory instrument, the pipette is widely used in various experimental operations, primarily for accurately transferring or adding small amounts of liquid reagents such as acids, bases, solutions, and indicators. Using a pipette ensures experimental accuracy and avoids errors caused by overdosage or underdosage. While conventional pipettes can control liquid volume to a certain extent, their accuracy can be subject to subjective misjudgment. Therefore, in applications requiring extremely high precision, ordinary pipettes suffer from quantitative inaccuracies and cannot meet the requirements for precise liquid volume control. Utility Model Content

[0003] In view of the fact that ordinary droppers in the prior art have the defect of inaccurate quantitative addition and cannot meet the requirement of precise control of liquid volume, the utility model provides a new quantitative dropper with simple structure and reasonable design, which can accurately add or transfer liquid, thereby ensuring the accuracy of the experiment.

[0004] In order to achieve the above technical objectives, the technical solutions adopted by this utility model are as follows:

[0005] A novel quantitative dropper comprises a dropper body, an air bag arranged at the top of the dropper body, and a drip nozzle arranged at the bottom of the dropper body. The dropper body comprises an inner tube and an outer tube. The upper end of the outer tube extends into the interior of the air bag, and the lower end of the inner tube is sealedly connected to the upper end of the drip nozzle. The upper part of the inner tube is arranged inside the outer tube, and the lower end of the outer tube is sealedly connected to the lower end or lower part of the inner tube. The interior of the inner tube forms an inner liquid storage cavity, and an outer liquid storage cavity is formed between the outside of the inner tube and the inside of the outer tube. The inner tube is provided with a through hole that connects the inner liquid storage cavity and the outer liquid storage cavity.

[0006] The novel quantitative dropper adopting the technical solution has a simple structure and reasonable design, and can accurately add or transfer liquids, thereby ensuring the accuracy of the experiment. The specific quantitative amount is completely determined by the volume of the inner tube. At the same time, the dropper also retains all the functions of existing ordinary droppers.

[0007] The dropper's interior is divided into an inner and outer liquid storage chambers, with a through-hole at the top. The inner chamber is used to quantitatively store the liquid to be transferred, while the through-hole drains excess liquid into the outer chamber, which then stores the remaining liquid.

[0008] The bottom of the dropper expel internal gas by squeezing, making the internal pressure of the dropper lower than atmospheric pressure. When the dropper comes into contact with liquid, the atmospheric pressure will suck the liquid into the dropper; the dropper body is mainly used to temporarily store liquid that needs to be transferred; the bottom of the drip nozzle is designed with a smaller tube mouth for sucking in and dripping liquid.

[0009] If quantitative dosage is required, the inner liquid storage cavity must be filled. If the volume of the airbag is too small, multiple suctions are required. In order to more efficiently fill the quantitative inner liquid storage cavity at one time, the volume of the airbag is limited to be larger than the volume of the inner liquid storage cavity.

[0010] The internal liquid storage chamber can be customized to 1ml, 2ml, 5ml, and other volumes as needed, enabling high-precision quantitative liquid transfer without being misjudged by subjective identification. This significantly improves droplet accuracy, ensuring the reliability of experimental data. This disposable dropper can be made of polymer materials such as PE and PP, effectively improving the inaccuracy of existing disposable droppers. The inner tube, outer tube, and nozzle are integrally formed.

[0011] Of course, the material of the dropper body can also be made of transparent and visible material, such as glass. A scale is provided along the vertical direction of the inner tube, and an identification number is marked at the uppermost end of the scale, that is, an identification number is set at the lower limit of the through hole. The identification number is the maximum volume of the inner liquid storage cavity.

[0012] This new quantitative dropper adopting this technical solution retains the functions and usage methods of the original dropper while also allowing for precise quantitative adjustment of the internal liquid storage chamber capacity, allowing for precise control of liquid addition or transfer, thereby ensuring experimental accuracy. The structure is simple and can be manufactured using either one-shot molding or separate parts that can be glued together, making it convenient and practical to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the cross-sectional structure of a new type of quantitative dropper;

[0014] Figure 2 for Figure 1 A schematic diagram of a novel quantitative dropper is shown, in which when a small amount of liquid is drawn, all the liquid is in the internal liquid storage cavity;

[0015] Figure 3 for Figure 1 The diagram shows a novel quantitative dropper. When a large amount of liquid is sucked in, the liquid exceeding the standard value will be stored in the external liquid storage cavity. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand, the technical solution of the utility model is further described below with reference to the accompanying drawings and embodiments.

[0017] Example:

[0018] like Figure 1 As shown, the utility model provides a novel quantitative dropper, comprising a dropper body 1, an air bag 2 arranged at the top of the dropper body 1 and a drip nozzle 3 arranged at the lower part of the dropper body 1, the dropper body 1 comprises an inner tube 11 and an outer tube 12, the upper end of the outer tube 12 extends into the interior of the air bag 2 and is sealed; the lower part of the inner tube 11 is sealed with the upper end of the drip nozzle 3; wherein the upper part of the inner tube 11 is arranged inside the outer tube 12, and the lower end of the outer tube 12 is sealed with the lower end of the inner tube 11, of course, this connection position can also be at the lower section of the inner tube 11, and is not necessarily limited to the lower end of the inner tube 11; an inner liquid storage cavity 111 is formed inside the inner tube 1, and an outer liquid storage cavity 121 is formed between the outside of the inner tube 11 and the inside of the outer tube 12, and a through hole 13 is provided on the inner tube 11 for communicating the inner liquid storage cavity 111 with the outer liquid storage cavity 121.

[0019] from Figure 1 As can be seen in the figure, the internal design of the dropper body is divided into an inner liquid storage cavity 111 and an outer liquid storage cavity 121. At the same time, a through hole 13 is provided at the top of the inner liquid storage cavity. The space in the inner liquid storage cavity 111 is used to quantitatively store the liquid to be transferred, and the through hole 13 discharges the excess liquid to the outer liquid storage cavity, which is used to store excess liquid.

[0020] The bottom of the dropper expel internal gas by squeezing, making the internal pressure of the dropper lower than atmospheric pressure. When the dropper comes into contact with liquid, the atmospheric pressure will suck the liquid into the dropper; the dropper body is mainly used to temporarily store liquid that needs to be transferred; the bottom of the drip nozzle is designed with a smaller tube mouth for sucking in and dripping liquid.

[0021] like Figure 2 As shown, when the amount of liquid sucked is small, all the liquid sucked into the quantitative dropper is in the internal liquid storage cavity. At this time, the pipetting volume does not reach the standard value and needs to be sucked again.

[0022] like Figure 3 As shown, when a large amount of liquid is drawn, the excess liquid will be stored in the outer liquid storage chamber. At this point, the liquid in the inner liquid storage chamber can be dripped into another container, and the liquid in the outer liquid storage chamber will not be dripped out. This allows for quantitative dripping of the liquid in the inner liquid storage chamber.

[0023] Therefore, according to needs, the capacity of the internal liquid storage cavity can be prepared into volumes such as 1ml, 2ml, 5ml, etc., to transfer liquid quantitatively with high precision without being misjudged by subjective identification, which can greatly improve the accuracy of dripping and thus ensure the reliability of experimental data.

[0024] Furthermore, in the above embodiment, in order to more efficiently fill a fixed amount of the internal liquid storage cavity at one time, the volume of the airbag 2 is limited to be larger than the volume of the internal liquid storage cavity 111 .

[0025] The disposable dropper can be made of polymer materials such as PE and PP, which can effectively improve the problem of insufficient dripping accuracy of existing disposable droppers. In this disposable dropper, the inner tube 11, the outer tube 12 and the drip nozzle 3 are integrally formed.

[0026] Alternatively, the dropper can be made of glass, rubber, or other materials to form a reusable, high-precision rubber-tipped dropper. Specifically, the dropper body 1 is made of a transparent, visible material, such as glass. A scale 15 is vertically disposed along the inner tube 11, with a marking numeral 14 located at the top of the scale 15, i.e., at the lower limit of the through hole 13. The marking numeral 14 represents the maximum volume of the inner liquid storage cavity 111.

[0027] In the above technical solution, the inner tube 11, the outer tube 12 and the drip nozzle 3 can also be manufactured separately and then sealed and bonded together by sealing adhesive.

[0028] The novel quantitative dropper of the present invention has a simple structure, a reasonable design, and can accurately add or transfer liquids, thereby ensuring the accuracy of the experiment. The specific quantitative amount is completely determined by the volume of the inner tube 11. At the same time, the dropper also retains all the functions of existing ordinary droppers.

[0029] The above is a detailed introduction to the novel quantitative dropper provided by the present invention. The description of the specific embodiment is only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A novel quantitative dropper, comprising a dropper body (1), an air bag (2) arranged on the top of the dropper body (1), and a drip nozzle (3) arranged at the bottom of the dropper body (1), characterized in that: The dropper body (1) comprises an inner tube (11) and an outer tube (12), the upper end of the outer tube (12) extends into the interior of the air bag (2), and the lower part of the inner tube (11) is sealed and connected to the upper end of the drip nozzle (3); wherein, the upper part of the inner tube (11) is arranged inside the outer tube (12), the lower end of the outer tube (12) is sealed and connected to the lower end or lower part of the inner tube (11), the interior of the inner tube (11) forms an inner liquid storage cavity (111), and an outer liquid storage cavity (121) is formed between the outside of the inner tube (11) and the inside of the outer tube (12), and the inner tube (11) is provided with a through hole (13) for connecting the inner liquid storage cavity (111) and the outer liquid storage cavity (121).

2. A novel quantitative dropper according to claim 1, characterized in that: The volume of the airbag (2) is greater than the volume of the internal liquid storage cavity (111).

3. A novel quantitative dropper according to claim 1, characterized in that: The inner tube (11), outer tube (12) and drip nozzle (3) are integrally formed.

4. A novel quantitative dropper according to claim 1, characterized in that: The dropper body (1) is made of a transparent and visible material.

5. A novel quantitative dropper according to claim 4, characterized in that: An identification number (14) is provided at the lower limit of the through hole (13), and the identification number (14) is the maximum volume of the internal liquid storage cavity (111).

6. A novel quantitative dropper according to claim 5, characterized in that: The inner tube (11) is provided with a scale (15) along the vertical direction, and the identification number (14) is marked at the uppermost end of the scale (15).

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