A dual-push rod micro-injector

Abstract

This application discloses a dual-push-rod micro-syringe, belonging to the technical field of chemical experimental equipment. The dual-push-rod micro-syringe includes: a sample injection cylinder with graduations; a needle fixedly connected to the end of the sample injection cylinder; a solution chamber inside the sample injection cylinder; a first push rod slidably connected within the solution chamber; a receiving cavity inside the first push rod; a driving rod slidably connected to one side of the receiving cavity; a handle fixedly installed at the upper end of the driving rod; and a second push rod fixedly connected to the end of the driving rod, the second push rod being inserted into the inner cavity of the needle. This technical solution, by setting the first and second push rods, effectively avoids residual liquid in the needle, ensuring that the test solution is accurately and completely pushed into the injection port, thus fully guaranteeing the accuracy of experimental results.

Description

Technical Field

[0001] This application relates to the field of equipment technology for chemical experiments, and more specifically, to a dual-push rod microsyringe. Background Technology

[0002] In the process of conducting chemical experiments, in order to ensure the accuracy of experimental results, the experimenter needs to perform precise sample injection. Therefore, relevant staff often use micro-syringes.

[0003] The prior art publication number CN219871380U provides a micro-sampling needle. This device, through the setting of a shell, piston assembly and other structures, ensures that if the micro-sampling needle slips to the ground due to operator error, the shell will contact the ground first, thereby preventing the glass tube from directly impacting the ground and preventing the glass tube from breaking and causing the liquid inside to splash, thus preventing unnecessary losses.

[0004] While the existing technical solutions described above improve the protective performance of micro-sampling needles, they still have the following drawbacks: The pusher of the aforementioned technical solutions and most single-push-rod injectors on the market can only be pushed to the bottom of the solution chamber, while the single pusher does not enter the needle tip chamber. This requires the operator to inject samples quickly and at a consistent parallel injection speed. When the injection speed is slow, solution residue will remain in the needle tip, and this trace amount of residual solution can affect the experimental results, causing the results of two injection measurements to exceed the standard deviation. Therefore, we propose a dual-push-rod micro-sampling injector. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this application is to provide a dual-push rod micro-syringe to solve the technical problems mentioned in the background.

[0007] 2. Technical Solution

[0008] This application provides a dual-push rod micro-syringe, comprising: a sample injection cylinder with a scale value, a needle fixedly connected to the end of the sample injection cylinder, a solution chamber inside the sample injection cylinder, a first push rod slidably connected inside the solution chamber, a receiving cavity inside the first push rod, a driving rod slidably connected to one side of the receiving cavity, a handle fixedly installed at the upper end of the driving rod, and a second push rod fixedly connected to the end of the driving rod, the second push rod being inserted into the inner cavity of the needle.

[0009] By adopting the above technical solution, the user places the needle in the test solution and repeatedly pushes and pulls the first push rod to clean the solution chamber. Then, the user pulls the first push rod to one side to take an appropriate amount of new test solution, inserts the needle into the injection port, and then pushes the first push rod to push out the solution in the solution chamber. The user then pushes the drive rod to one side, and the second push rod immediately enters the needle cavity to completely push out the solution in the needle. In this way, residual liquid in the needle can be effectively avoided, so that the test solution can be completely and accurately pushed into the injection port, thus fully ensuring the accuracy of the experimental results.

[0010] As an optional solution to the technical solution of this application, a protective sleeve is provided on the outside of the needle, and the protective sleeve is a conical structure.

[0011] By adopting the above technical solution, the needle can be protected.

[0012] As an optional solution to the technical solution of this application, a pushing component is installed on one side of the driving rod. The pushing component includes a receiving frame fixedly installed on the driving rod, and a first spring is fixedly connected between the receiving frame and the driving rod.

[0013] By adopting the above technical solution, it is easy to reset the drive rod.

[0014] As an optional solution to the technical solution of this application, a pushing component is installed on one side of the driving rod. The pushing component includes a receiving frame fixedly installed on the driving rod, and a first spring is fixedly connected between the receiving frame and the driving rod.

[0015] By adopting the above technical solution, the staff no longer need to manually push the second push rod with the drive rod, and the time for liquid to drain from both sides can be effectively reduced, thus avoiding any impact on the experiment.

[0016] As an optional solution to the technical solution of this application, the driving mechanism includes a second spring fixedly connected between the locking block and the receiving frame. Both the limiting block and the locking block are trapezoidal in shape. Several magnets are fixedly installed on the sample inlet cylinder, and the end of the locking block is magnetically engaged with the magnets.

[0017] By adopting the above technical solution, when the staff pulls the handle to one side, the second push rod will be stored in the storage cavity. The first spring will extend. Since both the limiting block and the locking block are trapezoidal structures, the limiting block will be locked onto the locking block. During the liquid dispensing process, after the first push rod is pushed to the bottom of the solution cavity, the locking block will move outward under the magnetic force of the magnet due to the magnetic cooperation between the end of the locking block and the magnet. The limiting block will lose its limiting position. Under the action of the first spring, the driving rod will drive the second push rod to one side to enter the needle cavity, completely dispensing the liquid.

[0018] 3. Beneficial effects

[0019] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0020] 1. The technical solution of this application, by setting a first push rod and a second push rod, can effectively avoid residual liquid in the needle, so that the test solution can be completely and accurately pushed into the injection port, thus fully ensuring the accuracy of the experimental results.

[0021] 2. The technical solution of this application, by setting a limit block, a locking block and a release mechanism, eliminates the need for staff to manually push the second push rod with the driving rod, and effectively reduces the time for liquid to drain from both sides, thus avoiding any impact on the experiment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the dual-push rod micro-syringe disclosed in a preferred embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the overall structure of the sample injection cylinder and the first pusher in a preferred embodiment of the dual-pusher micro-sampler disclosed in this application after being cut apart.

[0024] Figure 3 This is a schematic diagram of the overall structure of the dual-push rod microsyringe disclosed in a preferred embodiment of the present application when the first push rod and the second push rod are pushed to one side;

[0025] Figure 4 This is a schematic diagram of the pusher component in a preferred embodiment of the dual pusher microsyringe disclosed in this application;

[0026] The following are the labels in the diagram: 1. Sample inlet tube; 101. Solution chamber; 2. First push rod; 201. Receiving chamber; 3. Driving rod; 4. Handle; 5. Protective sleeve; 6. Second push rod; 7. Pushing assembly; 701. Limiting block; 702. Locking block; 703. Through groove; 704. Receiving frame; 705. Second spring; 706. First spring; 707. Magnet; 8. Needle. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the accompanying drawings.

[0028] Reference Figure 1 , Figure 2 and Figure 3This application discloses a dual-push rod micro-syringe, comprising: a sample injection cylinder 1, the sample injection cylinder 1 having a scale value, a needle 8 fixedly connected to the end of the sample injection cylinder 1, a solution chamber 101 opened inside the sample injection cylinder 1, a first push rod 2 slidably connected inside the solution chamber 101, a receiving cavity 201 opened inside the first push rod 2, a driving rod 3 slidably connected to one side of the receiving cavity 201, a handle 4 fixedly installed on the upper end of the driving rod 3, a second push rod 6 fixedly connected to the end of the driving rod 3, and the second push rod 6 being inserted into the inner cavity of the needle 8.

[0029] The user places the needle 8 into the test solution and repeatedly pushes and pulls the first push rod 2 to clean the solution chamber 101. Then, the user pulls the first push rod 2 to one side to take an appropriate amount of new test solution, inserts the needle 8 into the injection port, and then pushes the first push rod 2 to push out the solution in the solution chamber 101. The user then pushes the drive rod 3 to one side, and the second push rod 6 enters the inner cavity of the needle 8 to completely push out the solution in the needle 8. In this way, residual liquid in the needle 8 can be effectively avoided, so that the test solution can be completely and accurately pushed into the injection port, fully ensuring the accuracy of the experimental results.

[0030] Reference Figure 1 and Figure 2 A protective sleeve 5 is provided on the outside of the needle 8. The protective sleeve 5 has a conical structure and can protect the needle 8.

[0031] Reference Figure 2 , Figure 3 and Figure 4 A pushing component 7 is installed on one side of the driving rod 3. The pushing component 7 includes a receiving frame 704 fixedly installed on the driving rod 3. A first spring 706 is fixedly connected between the receiving frame 704 and the driving rod 3.

[0032] The push component 7 also includes a release mechanism, which includes several limiting blocks 701 fixedly installed on the handle 4. Several through slots 703 are provided on the receiving frame 704. A locking block 702 is slidably inserted in the through slot 703. The release mechanism also includes a drive mechanism, which is used to drive the locking block 702 to move linearly. The limiting blocks 701 and the locking block 702 are engaged.

[0033] The driving mechanism includes a second spring 705 fixedly connected between the locking block 702 and the receiving frame 704. Both the limiting block 701 and the locking block 702 are trapezoidal structures. Several magnets 707 are fixedly installed on the sample injection cylinder 1. The end of the locking block 702 is magnetically engaged with the magnets 707.

[0034] When the staff pulls the handle 4 to one side, the second push rod 6 is retracted into the receiving cavity 201. The first spring 706 extends. Since both the limiting block 701 and the locking block 702 are trapezoidal structures, the limiting block 701 will lock onto the locking block 702. During the liquid dispensing process, after the first push rod 2 is pushed to the bottom of the solution cavity 101, the locking block 702 moves outward under the magnetic force of the magnet 707 because the end of the locking block 702 is magnetically engaged with the magnet 707. The limiting block 701 loses its limiting position. Under the action of the first spring 706, the driving rod 3 drives the second push rod 6 to move to one side and enter the inner cavity of the needle 8, completely dispensing the liquid. In this way, the staff does not need to manually push the driving rod 3 to drive the second push rod 6, and it can effectively reduce the time for liquid to be discharged from both sides, avoiding any impact on the experiment.

[0035] By setting the first push rod 2 and the second push rod 6, this application can effectively avoid residual liquid in the needle 8, so that the test solution can be pushed into the injection port completely and accurately, thus fully ensuring the accuracy of the experimental results. At the same time, by setting the pushing component 7, the staff does not need to manually push the second push rod 6 with the driving rod 3, and it can effectively reduce the time for liquid to be discharged from both sides, thus avoiding any impact on the experiment.

[0036] The implementation principle of the dual-push rod micro-syringe in this application embodiment is as follows: When relevant personnel need to add a specified solution using this technical solution, the personnel first pull the handle 4 to one side, and the second push rod 6 will be stored in the storage cavity 201. The first spring 706 extends, and the limiting block 701 will be locked on the locking block 702 to prevent the second push rod 6 from resetting arbitrarily. Then, the personnel place the needle 8 in the test solution, and after gripping the handle 4 to fix the second push rod 6, repeatedly push and pull the first push rod 2 to wash the solution cavity 101. Then, pull the first push rod 2 to one side to take an appropriate amount of new test solution. Then, insert the needle 8 into the injection port, and push the first push rod 2 to push out the solution in the solution cavity 101. Then, the user pushes the drive rod 3 to one side, and the second push rod 6 then enters the inner cavity of the needle 8, completely pushing out the solution in the needle 8. In this way, the operation of adding the specified solution is completed.

Claims

1. A dual-push rod micro-syringe, characterized in that: It includes: a sample injection tube (1), the sample injection tube (1) is provided with a scale value, a needle (8) is fixedly connected to the end of the sample injection tube (1), a solution chamber (101) is opened in the sample injection tube (1), a first push rod (2) is slidably connected in the solution chamber (101), a receiving cavity (201) is opened in the first push rod (2), a driving rod (3) is slidably connected to one side of the receiving cavity (201), a handle (4) is fixedly installed on the upper end of the driving rod (3), a second push rod (6) is fixedly connected to the end of the driving rod (3), and the second push rod (6) is inserted into the inner cavity of the needle (8).

2. The dual-push rod micro-syringe according to claim 1, characterized in that: The needle (8) is covered with a protective sleeve (5), which is a conical structure.

3. The dual-push rod micro-syringe according to claim 1, characterized in that: A pushing component (7) is installed on one side of the driving rod (3). The pushing component (7) includes a receiving frame (704) fixedly installed on the driving rod (3). A first spring (706) is fixedly connected between the receiving frame (704) and the driving rod (3).

4. The dual-push rod micro-syringe according to claim 3, characterized in that: The push component (7) also includes a release mechanism, which includes several limiting blocks (701) fixedly installed on the handle (4). Several through slots (703) are provided on the receiving frame (704). A locking block (702) is slidably inserted in the through slot (703). The release mechanism also includes a drive mechanism, which is used to drive the locking block (702) to move linearly. The limiting block (701) and the locking block (702) are engaged.

5. The dual-push rod micro-syringe according to claim 4, characterized in that: The driving mechanism includes a second spring (705) fixedly connected between the locking block (702) and the receiving frame (704). The limiting block (701) and the locking block (702) are both trapezoidal structures. Several magnets (707) are fixedly installed on the sample injection cylinder (1). The end of the locking block (702) is magnetically engaged with the magnets (707).

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