Accurate suction syringe

Abstract

The utility model relates to the technical field of syringes, and discloses an accurate suction syringe which comprises a quantitative tube, an injection head is arranged at one end of the quantitative tube, scales are fixedly connected to the outer wall of the quantitative tube, a piston is slidably connected to the interior of the quantitative tube, a sliding rod is slidably connected to the outer wall of the piston, and the sliding rod is fixedly connected to the outer wall of the quantitative tube. A telescopic rod is arranged in the sliding rod, the outer wall of the telescopic rod is sleeved with a first spring, a sliding sleeve is slidably connected to the outer wall of the quantitative pipe, a limiting assembly is arranged on one side of the outer wall of the sliding sleeve and used for limiting movement of a piston, and a fixing assembly is arranged in the sliding sleeve. According to the utility model, the problems that the syringe is easy to operate inaccurately due to distraction and cannot meet the precision requirement of micro-liquid treatment are solved, and the purposes of setting the quantity in advance, ensuring that the quantity of liquid sucked each time is highly consistent and avoiding the inaccurate dosage caused by personal error are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to syringe technical field especially relates to accurate suction syringe. BACKGROUND

[0002] The syringe is a kind of medical and experimental tool for sucking and injecting liquid, and is widely used in medical dosing, laboratory research, chemical analysis and other fields.The traditional syringe is usually simple in design, and is suitable for general liquid operation, but its precision is difficult to meet the requirements when involving micro-liquid processing, accurate dose injection or high-precision chemical experiment.At this time, accurate suction syringe is particularly important.Accurate suction syringe ensures the accuracy of liquid suction and injection through fine scale, high-sealing piston, low-friction material and bubble removal design, thereby reducing errors, and accurate suction becomes indispensable especially in the scenes of precise dose of medicine, economical use of high-value reagent and high repeatability and reliability of experimental results.

[0003] When using the traditional suction syringe, first, ensure that the syringe is clean and intact, then insert the needle into the target liquid, and make the liquid enter the barrel by slowly pulling the piston, while paying attention to avoid generating bubbles.After the liquid is sucked, gently knock the syringe barrel and push the piston to remove the bubbles, to ensure the accuracy of liquid quantity.When reading the liquid quantity, look straight at the scale line, and take the lowest point of the crescent moon as the reference point.After completing the suction, liquid injection or other operations can be carried out according to the requirements, while attention should be paid to avoid excessive force or speed, to ensure the stability of operation and the accuracy of liquid quantity control.

[0004] When using the traditional suction syringe, the operator needs to pull the piston and read the scale at the same time, which is easy to cause inaccurate operation due to distraction, and difficult to meet the precision requirements of micro-liquid processing. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides an accurate suction syringe, which aims to improve the problem that the traditional suction syringe is easy to cause inaccurate operation due to distraction, and difficult to meet the precision requirements of micro-liquid processing.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: an accurate suction syringe, comprising a dosing tube, one end of the dosing tube is provided with a injection head, the outer wall of the dosing tube is fixedly connected with a scale, the inside of the dosing tube is slidably connected with a piston, the outer wall of the piston is slidably connected with a sliding rod, the inside of the sliding rod is provided with a telescopic rod, the outer wall of the telescopic rod is sleeved with a spring one, the outer wall of the dosing tube is slidably connected with a sliding sleeve, the outer wall of the sliding sleeve is provided with a limiting assembly on one side, the limiting assembly is used for limiting the movement of the piston, the inside of the sliding sleeve is provided with a fixing assembly, and the fixing assembly is used for fixing the movement of the sliding sleeve.

[0007] The fixed assembly includes a sliding rod, an outer wall of the sliding rod is slidingly connected in the inner part of the sliding sleeve, one end of the sliding rod is fixedly connected with a pull plate, the other end of the sliding rod is fixedly connected with a clamping block, an outer wall of the clamping block is fixedly connected with a limiting block, the clamping block and the limiting block are both slidingly connected in the inner part of the sliding sleeve, and the outer wall of the sliding rod is sleeved with a spring two.

[0008] Further, the limiting assembly includes a connecting column, one end of the connecting column is fixedly connected on one side of the outer wall of the sliding sleeve, one side of the outer wall of the sliding sleeve is fixedly connected with a limiting ring, and the outer wall of the limiting ring is slidingly connected with the inner wall of the dosing tube.

[0009] Further, an outer wall of the dosing tube is attached with a sealing plate, an outer wall of the sealing plate is fixedly connected with a mounting plate, an outer wall of the mounting plate is fixedly connected with a rotating shaft, an outer wall of the rotating shaft is provided with a connecting assembly, and the connecting assembly is used for connecting and fixing between the mounting plate and the dosing tube.

[0010] Further, the connecting assembly includes a rotating sleeve, the inner part of the rotating sleeve is rotationally connected with the outer wall of the rotating shaft, the inner part of the rotating sleeve is provided with a threaded rod, and the inner part of the dosing tube, the sealing plate and the mounting plate are all provided with mounting holes.

[0011] Further, one end of the telescopic rod is fixedly connected in the inner part of the piston, the other end of the telescopic rod is fixedly connected in the inner part of the sliding rod, and the telescopic rod is used for guiding the expansion and contraction of the spring one.

[0012] Further, one end of the spring one is fixedly connected with the inner wall of the piston, and the other end of the spring one is fixedly connected with the inner wall of the sliding rod.

[0013] Further, one end of the spring two is fixedly connected in the inner part of the sliding sleeve, and the other end of the spring two is fixedly connected in the inner part of the clamping block.

[0014] Further, the outer wall of the threaded rod is slidingly connected in the inner part of the dosing tube, the sealing plate and the mounting plate.

[0015] The utility model has the advantages of the following beneficial effects:

[0016] 1. In the utility model, first pull the sliding sleeve to move on the outer wall of the quantitative tube, at this time, cooperate with the pull plate, slide rod, spring two, clamping block and limiting block to realize the fixing and releasing of the sliding sleeve, in this process, the connecting column and the limiting ring are driven to move by the sliding sleeve, the movement of the piston is limited, in addition, cooperate with the slide rod, telescopic rod and spring one to facilitate suction, solve the problem that the syringe is easy to cause inaccurate operation due to distraction, difficult to meet the precision requirement of trace liquid processing, reach the advance setting of the quantitative, can ensure that the liquid volume of each suction is highly consistent, avoid the inaccurate dose caused by human error.

[0017] 2. In the utility model, first pull the rotating sleeve to rotate with the rotating shaft as the center, make the rotating sleeve wrap on the outer wall of the quantitative tube, sealing plate and mounting plate, then cooperate with the threaded rod to disassemble, so as to facilitate the disassembly of the piston inside, facilitate the cleaning of the inside of the quantitative tube, reach the disassembly to make the cleaning more thorough, effectively avoid the accumulation of liquid residue, drug residue or other pollutants in the syringe. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model provides the three-dimensional structure schematic diagram of precise suction syringe;

[0019] Figure 2 The utility model provides the inside structure schematic diagram of quantitative tube of precise suction syringe;

[0020] Figure 3 The utility model provides the one side structure schematic diagram of piston of precise suction syringe;

[0021] Figure 4 The utility model provides the one side structure schematic diagram of mounting plate of precise suction syringe.

[0022] Legend:

[0023] 1, quantitative tube;2, injection head;3, scale;4, slide rod;5, piston;6, telescopic rod;7, spring one;8, connecting column;9, sliding sleeve;10, pull plate;11, slide rod;12, spring two;13, clamping block;14, limiting block;15, limiting ring;16, rotating sleeve;17, threaded rod;18, sealing plate;19, mounting hole;20, mounting plate;21, rotating shaft. DETAILED DESCRIPTION

[0024] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] With reference to Figure 1 Figure 3 The present application provides an embodiment: an accurate suction syringe, comprising a dosing tube 1, one end of the dosing tube 1 is provided with a injection head 2, the outer wall of the dosing tube 1 is fixedly connected with a scale 3, the inside of the dosing tube 1 is slidably connected with a piston 5, the outer wall of the piston 5 is slidably connected with a sliding rod 4, the piston 5 is driven to slide in the inside of the dosing tube 1 through the sliding rod 4, and the suction use is realized in cooperation with the scale 3, the inside of the sliding rod 4 is provided with an extension rod 6, the outer wall of the extension rod 6 is sleeved with a spring 7, the piston 5 cannot be driven to move when being excessively stretched through the spring 7, and the artificial excessive pulling is avoided, the outer wall of the dosing tube 1 is slidably connected with a sliding sleeve 9, the outer wall of the sliding sleeve 9 is provided with a limiting assembly on one side, the limiting assembly is used for limiting the movement of the piston 5, and the inside of the sliding sleeve 9 is provided with a fixing assembly, the fixing assembly is used for fixing the movement of the sliding sleeve 9;

[0026] The fixing assembly comprises a sliding rod 11, the outer wall of the sliding rod 11 is slidably connected in the inside of the sliding sleeve 9, one end of the sliding rod 11 is fixedly connected with a pull plate 10, the other end of the sliding rod 11 is fixedly connected with a clamping block 13, the outer wall of the clamping block 13 is fixedly connected with a limiting block 14, and the clamping block 13 and the limiting block 14 are slidably connected in the inside of the sliding sleeve 9, the outer wall of the sliding rod 11 is sleeved with a spring 12, the sliding rod 11 and the clamping block 13 are driven to move by pulling the pull plate 10, so that the clamping block 13 slides in the inside of the dosing tube 1 and the sliding sleeve 9, when the clamping block 13 moves to the inside of the sliding sleeve 9, the sliding sleeve 9 can be pulled to slide on the outer wall of the dosing tube 1, and when the pull plate 10 is released, the clamping block 13 is driven to move to the inside of the dosing tube 1 through the rebound of the spring 12, the fixing and release of the sliding sleeve 9 are realized, finally, the clamping block 13 is limited by the limiting block 14, the limiting assembly comprises a connecting column 8, one end of the connecting column 8 is fixedly connected on one side of the outer wall of the sliding sleeve 9, the outer wall of the sliding sleeve 9 is fixedly connected with a limiting ring 15 on one side, the outer wall of the limiting ring 15 is slidably connected with the inner wall of the dosing tube 1, the connecting column 8 is driven to move through the movement of the sliding sleeve 9, so that the limiting ring 15 slides on the inner wall of the dosing tube 1 through the other side of the connecting column 8, and then the piston 5 is limited by the limiting ring 15;

[0027] With reference to Figure 1 Figure 4 ​​The outer wall of the quantitative tube 1 is attached with a sealing plate 18, the outer wall of the sealing plate 18 is fixedly connected with a mounting plate 20, the outer wall of the mounting plate 20 is fixedly connected with a rotating shaft 21, the mounting plate 20 and the quantitative tube 1 are sealed through the sealing plate 18, one end of the rotating sleeve 16 is conveniently rotated through the rotating shaft 21, the outer wall of the rotating shaft 21 is provided with a connecting assembly, the connecting assembly is used for connecting and fixing the mounting plate 20 and the quantitative tube 1, the connecting assembly comprises the rotating sleeve 16, the rotating sleeve 16 is rotatably connected in the outer wall of the rotating shaft 21, the rotating sleeve 16 is provided with a threaded rod 17 in the inside, the quantitative tube 1, the sealing plate 18 and the mounting plate 20 are all provided with mounting holes 19 in the inside, the threaded rod 17 is conveniently inserted into the inside of the quantitative tube 1, the sealing plate 18, the rotating sleeve 16 and the mounting plate 20 through the mounting holes 19, so as to realize fixing or releasing, one end of the telescopic rod 6 is fixedly connected in the inside of the piston 5, the other end of the telescopic rod 6 is fixedly connected in the inside of the sliding rod 4, the telescopic rod 6 is used for guiding the telescopic movement of the spring 7, one end of the spring 7 is fixedly connected to the inner wall of the piston 5, the other end of the spring 7 is fixedly connected to the inner wall of the sliding rod 4, one end of the spring 12 is fixedly connected to the inside of the sliding sleeve 9, the other end of the spring 12 is fixedly connected to the inside of the clamping block 13, the outer wall of the threaded rod 17 is slidably connected in the inside of the quantitative tube 1, the sealing plate 18 and the mounting plate 20.

[0028] Working principle: when the precise suction syringe needs to be used, first pull the pull plate 10 to drive the sliding rod 11 and the clamping block 13 in the inside of the sliding sleeve 9, at the same time, make the spring 12 contract, so that the sliding sleeve 9 is no longer limited, then pull the sliding sleeve 9 to slide on the outer wall of the spring 7, and then drive the limiting ring 15 to slide on the inner wall of the spring 7 through the connecting column 8, and then push the piston 5 to move on the inner wall of the spring 7 through the movement of the spring 7, so as to adjust the liquid storage capacity in the spring 7 according to the demand, when the sliding sleeve 9 moves to the appropriate position, the clamping block 13 is pushed into the inside of the quantitative tube 1 through the spring 12, and then the sliding sleeve 9 and the limiting ring 15 are fixed, in this process, the movement of the piston 5 will drive the telescopic rod 6 to stretch in the inside of the sliding rod 4, so that the sliding rod 4 and the piston 5 are not affected when they are driven to move, the movement of the piston 5 is limited, and the piston 5 is prevented from moving excessively.

[0029] In addition, the threaded rod 17 is inserted into the inside of the rotating sleeve 16, the quantitative tube 1, the sealing plate 18 and the mounting plate 20, and then the threaded rod 17 is disassembled through the external nut, so that the mounting plate 20 and the sealing plate 18 are conveniently disassembled on one side of the quantitative tube 1 through the rotating sleeve 16, and then the limiting ring 15 and the piston 5 are conveniently taken out from the inside of the quantitative tube 1, and then the inside is conveniently cleaned.

[0030] It should be explained finally: above only is the preferred embodiment of the utility model and is not used for limiting the utility model, although the utility model has been explained in detail with reference to foregoing embodiment, for the skilled person in the art, it still can modify the technical scheme recorded in foregoing each embodiment or make equivalent replacement to part technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be contained in the protection scope of the utility model.

Claims

1. A precision aspiration syringe, comprising a metering tube (1), characterized in that: One end of the metering tube (1) is provided with an injection head (2), the outer wall of the metering tube (1) is fixedly connected with a scale (3), the inside of the metering tube (1) is slidably connected with a piston (5), the outer wall of the piston (5) is slidably connected with a sliding rod (4), the inside of the sliding rod (4) is provided with a telescopic rod (6), the outer wall of the telescopic rod (6) is sleeved with a spring (7), the outer wall of the metering tube (1) is slidably connected with a sliding sleeve (9), one side of the outer wall of the sliding sleeve (9) is provided with a limiting component, the limiting component is used to limit the movement of the piston (5), the inside of the sliding sleeve (9) is provided with a fixing component, the fixing component is used to fix the movement of the sliding sleeve (9); The fixing component includes a slide rod (11), the outer wall of which is slidably connected to the inside of the sliding sleeve (9). One end of the slide rod (11) is fixedly connected to a pull plate (10), and the other end of the slide rod (11) is fixedly connected to a locking block (13). The outer wall of the locking block (13) is fixedly connected to a limiting block (14). Both the locking block (13) and the limiting block (14) are slidably connected to the inside of the sliding sleeve (9). The outer wall of the slide rod (11) is fitted with a spring (12).

2. The precision aspiration syringe according to claim 1, characterized in that: The limiting component includes a connecting post (8), one end of which is fixedly connected to one side of the outer wall of the sliding sleeve (9), and a limiting ring (15) is fixedly connected to one side of the outer wall of the sliding sleeve (9). The outer wall of the limiting ring (15) is slidably connected to the inner wall of the quantitative tube (1).

3. The precision aspiration syringe according to claim 1, characterized in that: A sealing plate (18) is attached to the outer wall of the metering tube (1). An installation plate (20) is fixedly connected to the outer wall of the sealing plate (18). A rotating shaft (21) is fixedly connected to the outer wall of the installation plate (20). A connecting component is provided on the outer wall of the rotating shaft (21). The connecting component is used to connect and fix the installation plate (20) and the metering tube (1).

4. The precision aspiration syringe according to claim 3, characterized in that: The connecting assembly includes a rotating sleeve (16), which is rotatably connected to the outer wall of the rotating shaft (21). A threaded rod (17) is provided inside the rotating sleeve (16). Mounting holes (19) are provided inside the metering tube (1), the sealing plate (18), and the mounting plate (20).

5. The precision aspiration syringe according to claim 1, characterized in that: One end of the telescopic rod (6) is fixedly connected to the inside of the piston (5), and the other end of the telescopic rod (6) is fixedly connected to the inside of the sliding rod (4). The telescopic rod (6) is used to guide the extension and retraction of the spring (7).

6. The precision aspiration syringe according to claim 1, characterized in that: One end of the spring (7) is fixedly connected to the inner wall of the piston (5), and the other end of the spring (7) is fixedly connected to the inner wall of the sliding rod (4).

7. The precision aspiration syringe according to claim 1, characterized in that: One end of the second spring (12) is fixedly connected to the inside of the sliding sleeve (9), and the other end of the second spring (12) is fixedly connected to the inside of the locking block (13).

8. The precision aspiration syringe according to claim 4, characterized in that: The outer wall of the threaded rod (17) is slidably connected to the inside of the metering tube (1), the sealing plate (18) and the mounting plate (20).

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