Pharmaceutical sampler

Abstract

The utility model relates to a pharmaceutical technology field discloses a kind of pharmacy sampler, including cylinder, piston head is sleeved in the inner cavity of cylinder, piston rod is fixedly installed in the side of piston head, the front end of cylinder is also sleeved with sampling hose;Further including ration mechanism, in the ration mechanism, threaded sleeve is screwed in the front end of cylinder by internal thread. The pharmacy sampler, guide rod is used to realize guiding effect, so that slider can move along straight line smoothly, ensure the movement direction accuracy of piston rod and piston head, avoid appearing deviation or shaking, further limit the sliding range of slider by screw rod cooperation positioning nut, the moving distance of slider can be accurately controlled by adjusting the position of positioning nut on screw rod, to further limit the activity range of piston head, realize the accurate limitation of single liquid sampling amount, effectively avoid the situation that user's mistake leads to sampling amount too much or too little, improve the accuracy and consistency of sampling.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical technology, specifically a pharmaceutical sampler. Background Technology

[0002] Pharmaceutical sampling is the process of extracting a portion of a batch of drugs or materials according to certain rules and methods; these samples will be used for subsequent testing, analysis or research to assess the quality of the entire batch of drugs or materials.

[0003] In traditional pharmaceutical sampling, users typically rely on manually pulling the piston rod to extract the drug solution, lacking an effective quantitative control device. This method is easily affected by factors such as the user's hand strength and skill level, leading to either too much or too little sample volume per operation. For example, novice users may extract far more drug solution than actually needed due to inaccurate control of the pumping force. Even experienced users may find it difficult to maintain a high degree of consistency in sample volume during prolonged operation or when fatigued. To address these issues, we have proposed a pharmaceutical sampler. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a pharmaceutical sampler that solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a pharmaceutical sampler, including a cylinder, a piston head sleeved in the inner cavity of the cylinder, a piston rod fixedly installed on the side of the piston head, and a sampling hose sleeved at the front end of the cylinder. It also includes a metering mechanism, in which a threaded sleeve is screwed onto the front end of the cylinder via an internal thread, and the surface protrusions of the threaded sleeve respectively fix the guide rod and the screw rod, and the surface of the screw rod is threaded with a positioning nut; A hand-held plate is fixedly installed at the tail end of the piston rod, and two connecting rods are fixedly installed on the side of the hand-held plate. A slider is fixedly installed at the end of each connecting rod.

[0006] Preferably, one of the sliders is slidably connected to the guide rod, and the other slider has a through hole for the screw to pass through.

[0007] Preferably, the inner diameter of the through hole is larger than the outer diameter of the screw.

[0008] Preferably, both the end of the guide rod and the end of the screw are chamfered.

[0009] Preferably, the outer surface of the positioning nut is provided with a protrusion to facilitate rotating the positioning nut.

[0010] Preferably, a gap is provided between the outer surface of the positioning nut and the outer surface of the cylinder.

[0011] Preferably, a sealing ring is fitted around the outer periphery of the piston head, and the sealing ring is tightly fitted to the inner wall of the cylinder.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This pharmaceutical sampler uses a guide rod to guide the slider, allowing it to move smoothly along a straight line. This ensures the accurate movement direction of the piston rod and piston head, preventing deviation or wobbling. A screw and a positioning nut limit the slider's sliding range. By adjusting the position of the positioning nut on the screw, the slider's movement distance can be precisely controlled, thereby limiting the piston head's range of motion. This allows for precise control of the single sample volume, effectively preventing user errors that could lead to excessive or insufficient sampling, thus improving sampling accuracy and consistency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional isometric view of the overall structure of this utility model; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 3 This is an exploded view of the piston rod structure of this utility model; Figure 4 This is an exploded view of the threaded sleeve structure of this utility model.

[0014] In the diagram: 1. Cylinder; 11. Sampling hose; 12. Piston rod; 13. Piston head; 2. Quantitative mechanism; 21. Threaded sleeve; 22. Screw; 23. Guide rod; 24. Connecting rod; 25. Hand-held plate; 26. Slider; 27. Positioning nut. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4A pharmaceutical sampler includes a cylindrical body 1, with a piston head 13 fitted inside the inner cavity of the cylindrical body 1. A piston rod 12 is fixedly installed on the side of the piston head 13, and a sampling hose 11 is fitted to the front end of the cylindrical body 1. A sealing ring is fitted around the outer periphery of the piston head 13, and the sealing ring fits tightly against the inner wall of the cylindrical body 1. The sealing ring can effectively prevent the liquid from leaking from the gap between the piston head 13 and the inner wall of the cylindrical body 1 during the extraction and discharge of the liquid. This not only ensures the accuracy of the sampling amount, but also avoids the pollution and waste that may be caused by the leakage of the liquid. The pressure inside the cylindrical body 1 is changed by moving the piston head 13 inside the cylindrical body 1, thereby realizing the extraction and discharge of the liquid. Its cooperation with the cylindrical body 1 is simple and effective, and can reliably complete the sampling operation.

[0017] The system also includes a quantitative mechanism 2. In the quantitative mechanism 2, a threaded sleeve 21 is screwed onto the front end of the cylinder 1 via an internal thread. The connection between the threaded sleeve 21 and the cylinder 1 is firm and reliable, ensuring that the quantitative mechanism 2 will not loosen or shift during sampling, thus guaranteeing the normal operation of the quantitative function. The protrusions on the surface of the threaded sleeve 21 fix the guide rod 23 and the screw 22 respectively. The screw 22 is threaded with a positioning nut 27. The ends of the guide rod 23 and the screw 22 are both chamfered, allowing the slider 26 to be smoothly fitted into the guide rod 23 during installation or disassembly, reducing jamming and resistance during installation, and improving the convenience and efficiency of operation. The outer surface of the positioning nut 27 is provided with a protrusion to facilitate the rotation of the positioning nut 27. A gap is provided between the outer surface of the positioning nut 27 and the outer surface of the cylinder 1. The gap design avoids interference between the positioning nut 27 and the cylinder 1 during rotation, ensuring that the positioning nut 27 can rotate freely, further improving the convenience of operation.

[0018] A hand-held plate 25 is fixedly installed at the tail end of the piston rod 12, providing the user with a larger operating area, making it easier and more comfortable for the user to push and pull the piston rod 12. At the same time, the hand-held plate 25 also serves as the mounting base for the connecting rod 24, providing stable support for the connection between the metering mechanism 2 and the piston rod 12. Two connecting rods 24 are fixed to the sides of the hand-held plate 25, transmitting the movement of the hand-held plate 25 to the slider 26, allowing the slider 26 to slide on the guide rod 23 and the screw 22 as the piston rod 12 moves. The design of the connecting rod 24 is simple. Effective and reliable in completing the motion transmission task, each connecting rod 24 has a slider 26 fixedly installed at its end. One slider 26 is slidably connected to the guide rod 23, and the other slider 26 has a through hole for passing through the screw 22. The inner diameter of the through hole is larger than the outer diameter of the screw 22, allowing the slider 26 to slide freely on the screw 22, while being restricted by the positioning nut 27. The two sliders 26 are connected to the hand plate 25 through the connecting rod 24, which together restricts the range of motion of the piston head 13, thereby ensuring the function of quantitative sampling.

[0019] Working principle: The inner cavity of the cylinder 1 is fitted with a piston rod 12 and a piston head 13. After the piston rod 12 moves the piston head 13, the liquid medicine can be drawn into the cylinder 1 through the sampling hose 11 for sampling. In the quantitative mechanism 2, the threaded sleeve 21 is screwed to the front end of the cylinder 1 through its internal thread. The protrusions on the surface of the threaded sleeve 21 fix the guide rod 23 and the screw 22 respectively. The side of the hand plate 25 fixed to the end of the piston rod 12 is fixed with two connecting rods 24 respectively. The end of the connecting rod 24 is fixed with a slider 26. The two connecting rods 24 are respectively inserted into the guide rod 23 and the screw 22 through the slider 26 at the end. The guide rod 23 is used to guide, and the screw 22, together with the positioning nut 27, restricts the sliding range of the slider 26, further restricting the range of motion of the piston head 13, thereby limiting the amount of liquid medicine sampled at one time and avoiding the situation where the user accidentally takes too much or too little sample.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pharmaceutical sampler, characterized in that, Includes a cylinder (1), with a piston head (13) sleeved inside the cylinder (1), a piston rod (12) fixedly installed on the side of the piston head (13), and a sampling hose (11) sleeved at the front end of the cylinder (1). It also includes a metering mechanism (2), in which a threaded sleeve (21) is screwed onto the front end of the cylinder (1) by an internal thread, and the protrusions on the surface of the threaded sleeve (21) fix the guide rod (23) and the screw (22) respectively, and the surface of the screw (22) is threaded with a positioning nut (27). A hand-held plate (25) is fixedly installed at the tail end of the piston rod (12). Two connecting rods (24) are fixedly installed on the side of the hand-held plate (25). A slider (26) is fixedly installed at the end of each connecting rod (24).

2. A pharmaceutical sampler according to claim 1, characterized in that, One of the sliders (26) is slidably connected to the guide rod (23), and the other slider (26) has a through hole for the screw (22) to pass through.

3. A pharmaceutical sampler according to claim 2, characterized in that, The inner diameter of the through hole is larger than the outer diameter of the screw (22).

4. A pharmaceutical sampler according to claim 1, characterized in that, Both the end of the guide rod (23) and the end of the screw (22) are chamfered.

5. A pharmaceutical sampler according to claim 1, characterized in that, The outer surface of the positioning nut (27) is provided with protrusions to facilitate rotating the positioning nut (27).

6. A pharmaceutical sampler according to claim 5, characterized in that, The outer surface of the positioning nut (27) is provided with a gap from the outer surface of the cylinder (1).

7. A pharmaceutical sampler according to claim 1, characterized in that, A sealing ring is fitted around the outer periphery of the piston head (13), and the sealing ring is tightly fitted to the inner wall of the cylinder (1).

Images