Medicine sampler for laboratory
By designing a laboratory drug sampler with a ratchet mechanism and scale, the problem of inaccurate sampling in the prior art is solved, and high accuracy and low working intensity of quantitative sampling are achieved.
Patent Information
- Application Number
- CN202421900958.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The existing liquid agent sampling process relies on manual operations, making it difficult to accurately control the piston position, resulting in errors in sampling dose and affecting subsequent detection results.
A laboratory drug sampler is designed to drive the threaded rod and piston movement by personnel rotating the sleeve, combined with the ratchet mechanism to avoid negative pressure backwards, and quantitative extraction is achieved using the specified angle of the scale rotation.
It improves the accuracy of sampling and quantification, reduces the work intensity of personnel, and ensures the reliability of subsequent test results.
Smart Images
Figure CN223021622U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of samplers, in particular to a drug sampler for laboratory use. Background Art
[0002] During the R & D process of drugs, it is necessary to detect and analyze the drug properties. Before the analysis, a sampling procedure needs to be carried out first. Most of the existing liquid medicine sampling processes are carried out manually, and personnel use syringes for direct sampling.
[0003] Although syringe sampling is simple and convenient, it also has certain defects: when personnel use a syringe, they pull the piston to form a negative pressure inside the syringe tube and suck the solution into the tube. Generally, sampling requires a fixed quantity, and personnel will pull the piston to a specified position according to the scale on the tube wall. However, due to the existence of negative pressure inside the tube, personnel need to control the position of the piston by hand. However, the pulling direction of personnel is the same as the moving direction of the piston, and there is negative pressure. Therefore, it is very difficult for personnel to accurately control the position of the piston, which requires a high technical level of personnel. Once the position of the piston is not controlled well, there may be an error in the sampling dose, which may affect the subsequent test results. Summary of the Utility Model
[0004] In view of the above deficiencies of the prior art, the utility model provides a drug sampler for laboratory use. Personnel rotate the sleeve to drive the threaded rod and / or the piston that is rotationally connected to the sleeve and axially limited by the limiting plate to move axially, extract the sample, rotate the sleeve by a specified angle according to the scale during rotation, extract quantitatively, and at the same time cooperate with the ratchet mechanism to prevent the piston from moving back due to negative pressure, ensuring the accuracy of sampling quantification and reducing the labor intensity of personnel.
[0005] To achieve the above object, the utility model is realized through the following technical solutions: A drug sampler for laboratory use includes a sleeve, a cylindrical shell-shaped installation box, an elliptical shell-shaped tube body, a threaded rod, and a needle head. The needle head is arranged at the bottom of the tube body, the installation box is arranged on the top of the tube body, the sleeve is rotatably arranged on the installation box and is coaxial with the installation box. The sleeve is internally provided with a thread matching the threaded rod, and the threaded rod is rotationally connected to the inside of the sleeve. The threaded rod is located inside the tube body and its lower end is connected with a limiting plate. The limiting plate is an elliptical disc shape and matches the inner wall of the tube body. A piston with an edge that completely abuts against the inner wall of the tube body is arranged at the bottom of the limiting plate. A ratchet mechanism is arranged on the sleeve inside the installation box. The setting of the ratchet mechanism satisfies that the rotation direction of the sleeve is the same as the rotation direction for driving the threaded rod to move upward. A through opening is provided on the side wall of the installation box, and a ratchet switch capable of opening the ratchet mechanism is arranged inside the through opening; a ventilation hole is provided on the tube body corresponding to a position close to the installation box; a scale is arranged in a circle on the upper surface of the installation box.
[0006] Preferably, a corrosion-resistant rubber is arranged at the bottom of the piston.
[0007] Preferably, rubber sleeves are provided on both sides of the outer side wall of the tube body.
[0008] Preferably, a rotating handle is provided at the top of the sleeve.
[0009] The utility model provides a drug sampler for laboratory use, which has the following beneficial effects:
[0010] 1. In the utility model, when a person rotates the sleeve, the threaded rod and / or the piston that are rotationally connected to the sleeve and axially limited by the limiting plate move axially to extract the sample. When rotating the sleeve, a specified angle is rotated according to the scale for quantitative extraction. At the same time, a ratchet mechanism is cooperated to prevent the piston from moving back due to negative pressure, ensuring the accuracy of sampling quantification and reducing the working intensity of personnel.
[0011] 2. In the utility model, anti-slip sleeves are provided on both sides of the outside of the tube body to prevent slipping of the hand during use; a corrosion-resistant rubber is provided at the bottom of the piston to increase the service life of the piston; a rotating handle is provided at the top of the sleeve to facilitate manual operation of the sleeve by personnel. Description of the Drawings
[0012] Figure 1 It is the front sectional view of a drug sampler for laboratory use of the utility model;
[0013] Figure 2 It is the bottom sectional view of the utility model at the position of the limiting plate of a drug sampler for laboratory use.
[0014] In the figure: 1, rotating handle; 2, scale; 3, ratchet switch; 4, through hole; 5, tube body; 6, piston; 7, sampling cavity; 8, needle; 9, sleeve; 10, ratchet mechanism; 11, installation box; 12, ventilation hole; 13, threaded rod; 14, limiting plate; 15, corrosion-resistant rubber; 16, rubber sleeve. Detailed Embodiments
[0015] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the utility model.
[0016] Such as Figure 1-2As shown in the figure, a drug sampler for laboratory use includes a sleeve 9, a cylindrical housing-shaped mounting box 11, an elliptical cylindrical housing-shaped tube body 5, a threaded rod 13 and a needle 8. The needle 8 is arranged at the bottom of the tube body 5, the mounting box 11 is arranged at the top of the tube body 5, the sleeve 9 is rotatably arranged on the mounting box 11 and is coaxial with the mounting box 11. A thread matching the threaded rod 13 is provided inside the sleeve 9, and the threaded rod 13 is screwed inside the sleeve 9. The threaded rod 13 is located inside the tube body 5 and its lower end is connected with a limiting plate 14. The limiting plate 14 is in the shape of an elliptical disc and matches the inner wall of the tube body 5. A piston 6 with an edge that completely abuts against the inner wall of the tube body 5 is arranged at the bottom of the limiting plate 14. A ratchet mechanism 10 is arranged on the sleeve 9 inside the mounting box 11. The setting of the ratchet mechanism 10 satisfies that the rotation direction of the sleeve 9 capable of rotating is the same as the rotation direction for driving the threaded rod 13 to move upward. A through hole 4 is opened on the side wall of the mounting box 11, and a ratchet switch 3 capable of opening the ratchet mechanism 10 is arranged inside the through hole 4. An air vent hole 12 is opened on the tube body 5 corresponding to the position close to the mounting box 11. A scale 2 is arranged in a circle on the upper surface of the mounting box 11. A corrosion-resistant rubber 15 is arranged at the bottom of the piston 6. Rubber sleeves 16 are arranged on both sides of the outer side wall of the tube body 5. A turning handle 1 is arranged at the top of the sleeve 9.
[0017] The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, which are as follows:
[0018] According to the attached drawings of the specification Figure 1-2 As can be seen, when the present utility model is in use, the initial position of the piston 6 is at the bottommost part of the tube body 5. When sampling, the operator inserts the needle 8 at the bottom of the tube body 5 into the solution to be sampled, and then the operator rotates the sleeve 9 rotatably connected to the mounting box 11. Since the ratchet mechanism 10 is arranged on the sleeve 9 inside the mounting box 11, it can only rotate unidirectionally without opening the ratchet switch 3. The threaded rod 13 is screwed with the sleeve 9, and the lower end of the threaded rod 13 is limited by the elliptical disc-shaped limiting plate 14 and the elliptical cylindrical housing-shaped tube body 5. As Figure 2As shown, the limiting plate 14 and the threaded rod 13 are prevented from rotating. Therefore, when the sleeve 9 rotates, it can drive the threaded rod 13 and the limiting plate 14 to move vertically. It should be noted here that the setting of the ratchet mechanism 10 ensures that the direction in which the sleeve 9 can rotate is the same as the rotation direction in which it drives the threaded rod 13 to move upward. Therefore, when the sleeve 9 rotates here, it drives the threaded rod 13 and the limiting plate 14 to move upward, thereby driving the piston 6 at the bottom of the limiting plate 14 to move upward in the tube body 5. Since the edge of the piston 6 is in complete contact with the inner wall of the tube body 5, that is to say, the sealing performance is very good. Its upward movement forms a sampling cavity 7 between its bottom and the tube body 5. The sampling cavity 7 is in a negative pressure state, and the solution flows from the needle 8 into the sampling cavity 7 for sampling work. During this process, after the sleeve 9 rotates, due to the characteristics of the ratchet mechanism 10 itself, it cannot rotate in the reverse direction, and the personnel do not need to continuously apply force to control the position of the piston 6 and just wait for the sample solution to enter the sampling cavity 7. To ensure quantitative sampling, when rotating the sleeve 9, it is rotated in cooperation with the scale 2 on the mounting box 11. The rotation angle is associated with the sampling amount. The larger the rotation angle, the greater the moving distance of the piston 6 and the more the sampling. Since the threaded rod 13 and the sleeve 9 are in a screwed connection relationship, the moving distance is proportional to the rotation angle. Technicians can calculate the relationship between the rotation angle and the moving distance of the piston 6 based on the thread design and experimental experience, so as to achieve the purpose of quantitative sampling. After the sample is extracted, it is taken to the designated position, the ratchet switch 3 at the through port 4 is opened, and the sleeve 9 is rotated in the reverse direction to squeeze out the sample, and the piston 6 returns to the initial position. The utility model drives the threaded rod 13 screwed with it and axially limited by the limiting plate 14 and / or the piston 6 to move axially by the personnel rotating the sleeve 9 to extract the sample. When rotating the sleeve 9, it is rotated by a specified angle according to the scale 2 for quantitative extraction. At the same time, in cooperation with the ratchet mechanism 10, it avoids the piston 6 from moving back due to negative pressure, ensures the accuracy of sampling quantification, and reduces the labor intensity of the personnel.
[0019] Wherein, a corrosion-resistant rubber 15 is provided at the bottom of the piston 6 to increase the service life of the piston 6; rubber sleeves 16 are provided on both sides of the outer side wall of the tube body 5 to prevent slipping of the hand during use; a turning handle 1 is provided at the top of the sleeve 9 to facilitate manual operation of the sleeve 9 by the personnel.
[0020] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A laboratory drug sampler, characterized in that: The invention comprises a sleeve (9), a cylindrical shell-shaped mounting box (11), an elliptical shell-shaped tube body (5), a threaded rod (13) and a needle (8), wherein the needle (8) is arranged at the bottom of the tube body (5), the mounting box (11) is arranged at the top of the tube body (5), the sleeve (9) is rotatably arranged on the mounting box (11) and is coaxial with the mounting box (11), the sleeve (9) is provided with a thread matching the threaded rod (13), and the threaded rod (13) is screwed into the sleeve (9), the threaded rod (13) is located in the tube body (5) and the lower end is connected to a limiting plate (14), the limiting plate (14) is elliptical and matches the inner wall of the tube body (5), A piston (6) whose edge is completely in contact with the inner wall of the tube body (5) is arranged at the bottom of the limit plate (14); a ratchet mechanism (10) is arranged on the sleeve (9) in the installation box (11); the ratchet mechanism (10) is arranged so that the sleeve (9) can rotate in the same direction as the rotation direction in which the sleeve (9) drives the threaded rod (13) to move upward; a through opening (4) is arranged on the side wall of the installation box (11); a ratchet switch (3) capable of opening the ratchet mechanism (10) is arranged in the through opening (4); an air vent (12) is arranged on the tube body (5) at a position corresponding to the position close to the installation box (11); and a scale (2) is arranged around the upper surface of the installation box (11).
2. A laboratory drug sampler according to claim 1, characterized in that: The bottom of the piston (6) is provided with corrosion-resistant rubber (15).
3. A laboratory drug sampler according to claim 1, characterized in that: Rubber sleeves (16) are arranged on both sides of the outer wall of the tube body (5).
4. A laboratory drug sampler according to claim 1, characterized in that: A rotating handle (1) is arranged on the top of the sleeve (9).