Integrated filter and liquid injection pen for cosmetic pre-treatment

Abstract

The utility model discloses an integrated filter liquid injection pen for cosmetic pretreatment, which comprises a pen cavity tube and a liquid suction tube, the front end of the pen cavity tube is connected with the liquid suction tube, the rear end of the pen cavity tube is slidably connected with a piston rod inside, the pen cavity tube is in sealing cooperation with the piston rod, the liquid suction tube is a soft plastic tube, a filter membrane is prearranged in the front part of the liquid suction tube, and an easy-to-tear opening is arranged in the middle part of the liquid suction tube to divide the liquid suction tube into two sections. The utility model can solve the problems of uneven test components and complicated operation in the existing cosmetic pretreatment filtering operation.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical testing technology, specifically to an integrated filter injection pen used for cosmetic pretreatment. Background Technology

[0002] Cosmetics are daily chemical industrial products applied to the skin, hair, nails, lips, and other human body surfaces by rubbing, spraying, or other similar methods for the purpose of cleansing, protecting, beautifying, and modifying. Inappropriate preservative systems, illegally added antibiotics, hormones, fragrances, plant allergens, and many other substances in cosmetics that affect human health have become a key focus of routine supervision and inspection.

[0003] Currently, the main techniques for detecting cosmetic samples are high-performance liquid chromatography (HPLC) and gas chromatography (GC), coupled with mass spectrometry (MS) for simultaneous determination of multiple components. However, cosmetics have complex compositions, primarily composed of water, oils, emulsifiers, active ingredients, and other raw materials. Before using precision analytical instruments such as HPLC, GC, and MS, samples need to undergo processes such as dissolution, dilution, extraction, and digestion. The treated sample solutions are then filtered through a filter membrane and transferred to sample vials.

[0004] The currently widely used method in laboratories is to first use a syringe to draw up the sample solution (which has already undergone dissolution, dilution, extraction, and digestion), then attach an external filter to the syringe tip, and inject the sample solution in batches into sample vials after filtration, providing a reliable sample basis for subsequent precise detection. However, this method has significant drawbacks: 1. During the filtration process, the filtration capacity of the filter membrane gradually weakens, resulting in a stronger adsorption force on the analyte in the initial filtrate, leading to inconsistencies in the analyte content between the initial and subsequent filtrates, affecting subsequent detection results; 2. When handling large batches of samples, the repeated installation and removal of the filter is cumbersome, reducing work efficiency and increasing the workload of testing personnel. Utility Model Content

[0005] This invention provides an integrated filter injection pen for cosmetic pretreatment, which can solve the problems of uneven distribution of test components and cumbersome operation in the existing cosmetic pretreatment filtration process.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows: The integrated filter injection pen used for cosmetic pretreatment includes a pen chamber and a suction tube. The front end of the pen chamber is connected to the suction tube, and the rear end is internally connected to a piston rod. The pen chamber and the piston rod are sealed together. The suction tube is a soft plastic tube with a filter membrane pre-installed in the front part and an easy-tear opening in the middle that can divide the suction tube into two sections.

[0007] Furthermore, the pen cavity is made of rigid plastic.

[0008] Furthermore, the filter membrane is a microporous filter membrane.

[0009] Preferably, the filter membrane is an aqueous PES filter membrane or an organic nylon filter membrane.

[0010] Preferably, the pore size of the filter membrane is 0.22 μm or 0.45 μm.

[0011] Furthermore, the liquid injection pen is a disposable consumable.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This invention pre-places a filter membrane inside the injection pen. The test liquid is filtered through the filter membrane during the liquid aspiration stage. Then, the pen body is inverted to allow the filtrate to be fully mixed in the pen tube. The filter membrane is then removed through the easy-tear opening, and the filtrate is injected into the sample bottle. This solves the problem of "uneven composition of the filtrate in the front and back stages" caused by filter membrane adsorption, and provides a reliable sample basis for subsequent precision detection.

[0013] 2. This utility model is a disposable consumable, which avoids the subsequent work such as classifying and discarding consumables and cleaning the device. Each sample uses a separate injection pen, eliminating cross-contamination between different samples. The integrated design of the injection pen and the filter membrane eliminates the steps of repeatedly installing and disassembling the filter in the traditional operation. The filter membrane can be removed directly by tearing open the "easy-tear opening", which is simple and convenient. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A magnified view of part A in the middle; In the diagram: 1-pen cavity tube, 2-liquid suction tube, 3-piston rod, 4-filter membrane, 5-tearable opening. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] In the description of the embodiments of this application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0018] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] As shown in the figure, this is an integrated filter injection pen used for cosmetic pretreatment. The entire pen is a disposable consumable, consisting of a pen tube 1 and a suction tube 2. The pen tube 1 is made of rigid plastic, with its front end connected to the suction tube 2 and its rear end internally connected to a piston rod 3. The pen tube 1 and piston rod 3 are sealed together. The suction tube 2 is a soft plastic tube with a diameter of approximately 3 mm. A filter membrane 4 is pre-installed at the front of the suction tube. The filter membrane 4 is a microporous filter membrane, and the pore size can be selected as 0.22 μm or 0.45 μm depending on the requirements of the testing instrument. Depending on the type of solution being processed, the filter membrane 4 can be an aqueous PES filter membrane or an organic nylon filter membrane. The suction tube 2 has an easy-tear opening 5 in the middle that can divide the suction tube 2 into two sections.

[0020] When in use, pull the piston rod 3 to draw the sample solution to be tested from the suction tube 2. The sample solution is filtered through the filter membrane 4 and enters the pen chamber tube 1, while impurities remain at the front end of the filter membrane 4. Invert the injection pen to allow the filtrate to mix thoroughly in the pen chamber tube 1. Finally, tear open the easy-tear opening 5 to remove the front end of the suction tube 2 containing the filter membrane 4, and push the piston rod 3 to inject the filtrate in batches into the sample bottle, completing the pretreatment filtration injection operation.

[0021] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. An integrated filter dispensing pen for cosmetic pretreatment, characterized in that: It includes a pen cavity tube (1) and a suction tube (2). The front end of the pen cavity tube (1) is connected to the suction tube (2), and the rear end is slidably connected to the piston rod (3). The pen cavity tube (1) and the piston rod (3) are sealed together. The suction tube (2) is a soft plastic tube with a filter membrane (4) pre-installed in the front part and an easy-tear opening (5) in the middle that can divide the suction tube (2) into two sections.

2. The integrated filter dispensing pen for cosmetic pretreatment according to claim 1, characterized in that: The pen cavity (1) is made of rigid plastic.

3. The integrated filter dispensing pen for cosmetic pretreatment according to claim 1, characterized in that: The filter membrane (4) is a microporous filter membrane.

4. The integrated filter dispensing pen for cosmetic pretreatment according to claim 3, characterized in that: The filter membrane (4) is an aqueous PES filter membrane or an organic nylon filter membrane.

5. The integrated filter dispensing pen for cosmetic pretreatment according to claim 4, characterized in that: The filter membrane (4) has a pore size of 0.22 μm or 0.45 μm.

6. The integrated filter dispensing pen for cosmetic pretreatment according to any one of claims 1-5, characterized in that: The liquid injection pen is a single-use consumable.

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