Liquid hanging prevention substrate needle

Abstract

The utility model discloses a liquid hanging prevention substrate needle which comprises a needle base, two locking connectors are arranged at the top of the needle base, first through holes matched with Teflon needle tubes are formed in the locking connectors and correspond to two second through holes formed in the middle of the needle base respectively, third through holes communicated with the two second through holes are formed in the bottom of the needle base, and the third through holes are communicated with the Teflon needle tubes respectively. A needle head extending downwards is arranged in the third through hole, a fourth through hole is formed in the needle head, the number of the Teflon needle tubes is two, and the two Teflon needle tubes penetrate into the first through hole, pass through the second through hole, then converge in the third through hole and then penetrate through the fourth through hole in parallel; wherein the needle seat and the needle head are both heat conduction workpieces, a heating piece and a temperature sensor are arranged on the needle seat, and heat insulation protective sleeves are arranged on the outer sides of the needle seat and the needle head. The needle is simple in structure and easy to assemble, liquid hanging of the needle tip can be effectively avoided, filled liquid can be well heated, and the accuracy of a detection result is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of in vitro diagnostic equipment technology, and in particular to an anti-soaking substrate needle. Background Technology

[0002] Chemiluminescence immunoassay combines highly sensitive chemiluminescence assays with highly specific immunoreactions for the detection and analysis of various antigens, haptens, antibodies, hormones, enzymes, fatty acids, vitamins, and drugs. Before light source detection, a substrate is added to the sample. The substrate reacts with enzymes (such as horseradish peroxidase or alkaline phosphatase) labeled on antibodies or antigens, generating excited-state intermediates. These intermediates release photons upon returning to the ground state, forming a detectable light signal. Existing substrate needles are mostly two-needle structures. Due to assembly difficulties and susceptibility to structural deformation, some highly adsorbed biomolecules or chemicals can cause residue buildup at the needle tip during substrate addition, leading to deviations in substrate dosage and affecting the accuracy of the results. Furthermore, some samples require temperature control, necessitating substrate heating, which existing substrate needles cannot meet, resulting in inaccurate detection results. Summary of the Invention

[0003] To solve the above problems, this utility model provides a liquid-resistant substrate needle that can achieve heating function, specifically through the following technical solution:

[0004] The anti-slip substrate needle of this utility model includes a needle base. The top of the needle base is provided with two locking connectors. The locking connectors have a first through hole adapted to the Teflon needle tube. The first through hole corresponds to two second through holes provided in the middle of the needle base. The bottom of the needle base is provided with a third through hole connected to the two second through holes. The third through hole is provided with a downwardly extending needle. The needle is provided with a fourth through hole. There are two Teflon needle tubes. The two Teflon needle tubes are respectively inserted into the first through hole, pass through the second through hole, and then converge in the third through hole, and then pass through the fourth through hole in parallel. The needle base and the needle are both heat-conducting components. The needle base is provided with a heating element and a temperature sensor. The needle base and the needle are provided with a heat-insulating protective sleeve.

[0005] The top of the needle seat is provided with an internal threaded hole that is compatible with the locking connector, and the inner diameter of the internal threaded hole is larger than the diameter of the second through hole.

[0006] The bottom of the locking joint is provided with an elastic sealing gasket.

[0007] The elastic sealing gasket is a tapered structure with its head extending into the first through hole.

[0008] The needle tip and the needle base are connected by a set screw, and the top of the needle tip is spaced apart from the second through hole.

[0009] The needle has a two-step structure with the outer diameter decreasing from top to bottom, and the lower edge of the heat insulation protective sleeve is located at the step dividing line of the needle.

[0010] The heating element is disposed between the needle holder and the heat insulation protective sleeve, and the temperature sensor is disposed in the reserved hole of the needle holder.

[0011] The anti-liquid-slip substrate needle provided by this utility model has a simple structure and is easy to assemble. The Teflon needle tube can be well fixed by the cooperation of the needle seat, needle, locking connector and elastic sealing ring, preventing it from moving up and down and effectively avoiding liquid dripping from the needle tip. In addition, the needle seat is equipped with a heating element and a temperature sensor. The needle seat and the outside of the needle are wrapped with a heat-insulating protective sleeve, which can control the temperature within a certain range and heat the added liquid well, thereby ensuring the accuracy of the test results. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 yes Figure 1 Cross-sectional view. Detailed Implementation

[0014] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0015] like Figure 1 , 2 As shown, the anti-slip substrate needle of this utility model includes a needle base 1. Two threaded holes are formed at the top of the needle base 1, and a locking connector 2 is installed in each threaded hole. The locking connector 2 has a first through hole adapted to the Teflon needle tube 3, which corresponds to two second through holes located in the middle of the needle base 1. The second through holes are of the same diameter as the first through holes, while the inner diameter of the internal threaded hole is larger than the diameter of the second through hole. To further secure the Teflon needle tube 3, an elastic sealing gasket 4 is provided at the bottom of the locking connector 2. This elastic sealing gasket 4 has a tapered structure with its head extending into the first through hole. The locking connector 2 presses the elastic sealing gasket 4 tightly against the bottom of the threaded hole, and the elastic sealing gasket 4, through deformation, firmly fixes the Teflon needle tube 3, preventing it from moving up and down.

[0016] A third through hole 5 is provided at the bottom of the needle holder 1, which communicates with both second through holes. A downwardly extending needle 6 is disposed within this third through hole. The needle 6 is connected to the needle holder 1 by a set screw, and the top of the needle 6 is spaced apart from the second through holes. The needle 6 has a two-stage stepped structure with its outer diameter decreasing from top to bottom, ensuring that the Teflon needle tube 3 can be smoothly inserted into the reaction cup after moving downwards, thereby ensuring the accuracy of the injection position. A fourth through hole is provided at the center of the needle 6, which is used to accommodate two parallel Teflon needle tubes 3.

[0017] Both the needle holder 1 and the needle tip 6 are heat-conducting components (they can be made of metal materials such as copper and aluminum, or PE-based composite materials with added thermally conductive fillers). A heating element 7 and a temperature sensor 8 are provided on the needle holder 1. The heating element 7 is located on the top outer side of the needle holder 1, and the temperature sensor 8 is located in a pre-drilled hole in the needle holder 1. When heating is applied through the heating element 7, the temperature sensor 8 can provide feedback on the heating temperature, thereby achieving temperature control. To prevent heat loss, a heat-insulating protective sleeve 9 is provided on the outer side of the needle holder 1 and the needle tip 6. In this embodiment, the heating element 7 is located between the needle holder 1 and the heat-insulating protective sleeve 9, and the lower edge of the heat-insulating protective sleeve 9 is located at the step boundary line of the needle tip 6.

[0018] In this invention, there are two Teflon needle tubes 3. The two Teflon needle tubes 3 are inserted into the first through hole, pass through the second through hole, and then converge in the third through hole. After that, they pass through the fourth through hole in parallel. During installation, first, the two Teflon needle tubes 3 are inserted into the second through hole of the needle base 1. Then, an elastic sealing gasket 4 and a locking connector 2 are installed sequentially on the head of each Teflon needle tube 3. The locking connector 2 is screwed onto the needle base 1 and screwed downwards to the appropriate position, so that the elastic sealing gasket 4 undergoes a certain compression deformation. Then, the two Teflon needle tubes 3 are inserted side by side into the fourth through hole of the needle tip 6. The needle tip 6 is then moved upwards so that its head enters the third through hole of the needle base 1. After reaching the predetermined position, it is fixedly connected by a set screw. Finally, a heat-insulating protective sleeve 9 is installed on the outside of the needle tip 6 and the needle base 1 to complete the assembly of the substrate needle.

[0019] This invention features a compact and robust structure. The Teflon needle 3 exhibits strong corrosion resistance and can effectively control the temperature of the substrate via the heating element 7 and temperature sensor 8. When injecting hydrophobic luminescent substrates, it can fully avoid liquid residue on the needle tip, thereby improving the accuracy of the detection results.

[0020] It should be noted that in the description of this utility model, terms such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", and "outer" indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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, they should not be construed as limitations on this utility model.

Claims

1. A substrate-resistant needle, characterized in that: The device includes a needle holder, with two locking connectors on the top. Each locking connector has a first through hole adapted to a Teflon needle tube. The first through hole corresponds to two second through holes located in the middle of the needle holder. The bottom of the needle holder has a third through hole communicating with the two second through holes. A needle extending downwards is located in the third through hole. A fourth through hole is located in the needle. There are two Teflon needle tubes, which are inserted into the first through hole, pass through the second through hole, and then converge in the third through hole before passing through the fourth through hole in parallel. Both the needle holder and the needle are heat-conducting components. The needle holder is equipped with a heating element and a temperature sensor. A heat-insulating protective sleeve is provided on the outside of the needle holder and the needle.

2. The anti-liquid-soaking substrate needle according to claim 1, characterized in that: The top of the needle seat is provided with an internal threaded hole that is compatible with the locking connector, and the inner diameter of the internal threaded hole is larger than the diameter of the second through hole.

3. The anti-liquid-soaking substrate needle according to claim 1, characterized in that: The bottom of the locking joint is provided with an elastic sealing gasket.

4. The anti-liquid-soaking substrate needle according to claim 3, characterized in that: The elastic sealing gasket is a tapered structure with its head extending into the first through hole.

5. The anti-liquid-soaking substrate needle according to claim 1, characterized in that: The needle tip and the needle base are connected by a set screw, and the top of the needle tip is spaced apart from the second through hole.

6. The anti-liquid-soaking substrate needle according to claim 1, characterized in that: The needle has a two-step structure with the outer diameter decreasing from top to bottom, and the lower edge of the heat insulation protective sleeve is located at the step dividing line of the needle.

7. The anti-liquid-soaking substrate needle according to claim 1, characterized in that: The heating element is disposed between the needle holder and the heat insulation protective sleeve, and the temperature sensor is disposed in the reserved hole of the needle holder.

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