Liquid detection quantitative pipette

Abstract

The utility model discloses a kind of quantitative pipettors for liquid detection, belong to pipettor technical field.It include sampling frame and disinfection frame, the outside of sampling frame is provided with disinfection frame, the center position of the top of sampling frame is provided with servo motor, the output of servo motor is installed with driving shaft, the surface of driving shaft is provided with transmission gear, the movable mounting of screw rod is achieved on the inner wall of sampling frame in driving shaft side, the inner wall of sampling frame in driving shaft other side is installed with slide bar, the surface of screw rod in transmission gear side is provided with driven gear, and transmission gear and driven gear are engaged with each other, the surface of screw rod in driven gear side is provided with moving plate, and moving plate is connected with screw rod thread connection.The utility model not only realizes automatic quantitative suction and discharging liquid, facilitates secondary use after disinfection, and improve the convenience of use and reduce use cost.

Description

Technical Field

[0001] This utility model relates to the field of pipette technology, specifically to a quantitative pipette for liquid detection. Background Technology

[0002] A pipette, also called a pipette, is a measuring tool used to transfer liquid from one container to another within a certain volume range. It is widely used in fields such as biology and chemistry. In clinical laboratories, pipettes are widely used due to their simple basic structure and ease of use. The design of commonly used micropipettes in clinical practice is based on Hooke's Law: that within certain limits, the force exerted by a stretched spring is proportional to the elastic force. In other words, the volume of liquid in a pipette is proportional to the spring force within the pipette. Traditional pipettes are mostly specialized, meaning that after sampling one type of liquid, they cannot be used to sample other liquids, limiting their application scenarios. To improve this situation, a quantitative pipette for liquid detection has been proposed.

[0003] A quantitative pipette, as disclosed in authorization announcement number CN211099118U, includes a metering cylinder. A rotating ring is threadedly connected to the outer surface of the metering cylinder. A connecting frame is fixedly connected to the bottom of the rotating ring. A pipette tip is fixedly connected to the bottom end of the connecting frame. The pipette tip is threadedly connected to the metering cylinder. A limit block and a filter element are provided on the inner wall of the pipette tip. The bottom end of the metering cylinder overlaps with the top of the limit block. A through hole is provided on the top of the metering cylinder.

[0004] Although it achieves the goal of fixing the rotating ring, connecting frame and gun tip together as one unit through the setting of rotating ring, connecting frame and gun tip, the rotating ring can be separated from the metering cylinder by rotating the rotating ring, and the gun tip can be separated from the metering cylinder by the setting of rotating groove, the setting of rotating groove facilitates the rotation of rotating ring, making it more convenient to operate, and also avoids hand contact with residual liquid on the gun tip, saving the time wasted by wearing gloves.

[0005] However, this does not solve the problems of existing pipettes being unsuitable for automatic quantitative aspiration and discharge of liquids, and unsuitable for reuse after sterilization, thus affecting the convenience and cost of use. Utility Model Content

[0006] The purpose of this invention is to provide a quantitative pipette for liquid detection, so as to solve the problems mentioned in the background art, which are that the pipette is not convenient for automatic quantitative aspiration and discharge of liquid, is not conducive to secondary use after disinfection, and affects the convenience and cost of use.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A quantitative pipette for liquid detection includes a sampling frame and a sterilization frame. The sterilization frame is disposed outside the sampling frame. A servo motor is disposed at the center of the top of the sampling frame. A drive shaft is installed at the output end of the servo motor. A transmission gear is disposed on the surface of the drive shaft. A lead screw is movably mounted on the inner wall of the sampling frame on one side of the drive shaft. A slide rod is installed on the inner wall of the sampling frame on the other side of the drive shaft. A driven gear is disposed on the surface of the lead screw on one side of the transmission gear, and the transmission gear and the driven gear mesh with each other. A movable plate is disposed on the surface of the lead screw on one side of the driven gear, and the movable plate is threadedly connected to the lead screw and slidably connected to the slide rod.

[0008] Optionally, a piston is provided at the bottom end of the movable plate, and an external threaded sleeve is provided at the center of the bottom end of the sampling frame.

[0009] Optionally, the piston is slidably connected to the external threaded sleeve, and the bottom of the sampling frame on both sides of the external threaded sleeve is provided with a plug buckle.

[0010] Optionally, the surface of the external threaded sleeve is provided with a transparent graduated tube, and the inner wall of the transparent graduated tube is provided with an internal thread.

[0011] Optionally, the internal thread is threaded to the external thread sleeve, and a needle is provided at the bottom end of the transparent graduated tube.

[0012] Optionally, two sets of operation buttons are provided on one side wall of the sampling frame, and a hand rope is provided on the other side wall of the sampling frame.

[0013] Optionally, a disinfection tube is provided at the center of the disinfection frame, and the top of the disinfection frame on both sides of the disinfection tube is provided with a plug-in slot, and the plug-in buckle can be inserted into the plug-in slot.

[0014] Optionally, water pumps are symmetrically arranged on the outer wall of the disinfection tube, and each water pump has a delivery pipe at its input end.

[0015] Optionally, the disinfection tube has nozzles symmetrically arranged on its inner wall, and the nozzles are connected to the output end of the water pump, and the surface of the disinfection tube has a drain port.

[0016] Optionally, a battery is provided at the top of the sampling frame on one side of the servo motor, and a controller is provided at the top of the sampling frame on the other side of the servo motor, and the output terminal of the controller is electrically connected to the input terminal of the servo motor and the water pump.

[0017] Compared with the prior art, the beneficial effects of this utility model are: this pipette not only realizes automatic quantitative aspiration and discharge of liquid, facilitating secondary use after disinfection, but also improves the convenience of use and reduces the cost of use.

[0018] Take the transparent graduated tube and fit it onto the surface of the external threaded sleeve. Rotate the transparent graduated tube to secure it to the surface of the external threaded sleeve. Take the sampling frame by inserting four fingers (excluding the thumb) into the wrist strap and gripping the sampling frame with those four fingers. Press the two sets of operation buttons with your thumb. These buttons correspond to the aspiration and drainage functions, respectively. Insert the needle into the liquid to be tested and press the aspiration button. This closes the circuit and sends a signal to the controller to activate the servo motor. The servo motor drives the transmission gear through the drive shaft, which in turn drives the lead screw through the driven gear. The lead screw moves the moving plate, which in turn moves the piston inside the transparent graduated tube, causing the transparent graduated tube to move. A negative pressure is created inside, and the liquid enters the transparent graduated tube through the needle. The volume of liquid to be aspirated can be determined by the scale on the surface of the transparent graduated tube. Once the specified volume is reached, aspiration stops, and the sampling frame is moved. Pressing the operation button representing liquid discharge will cause the servo motor to rotate in reverse. Through a series of transmissions, the piston moves in the reverse direction to discharge the liquid in the transparent graduated tube through the needle into the detection dish, thus completing the quantitative liquid transfer. After aspiration of a certain liquid is completed, the transparent graduated tube can be rotated in reverse to remove it from the surface of the external threaded sleeve for single use, avoiding contamination of other liquid sources by secondary use. This achieves automatic aspiration and discharge of liquid and facilitates convenient disassembly and assembly of the graduated tube.

[0019] After removing the transparent graduated tube, press the sampling frame onto the surface of the disinfection frame, allowing the snap fastener to insert into the snap slot. The snap fastener provides limiting support for the sampling frame to prevent it from tipping over. At this time, the piston extends into the disinfection tube, and the water pump draws the disinfectant from the disinfection frame through the delivery pipe and sprays it out from the nozzle. The disinfectant sprays onto the surface of the piston to disinfect it. The waste liquid after use is discharged through the drain port. After the piston is disinfected, the transparent graduated tube can be repositioned to draw and transfer other liquids, which can reduce its usage cost. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional exploded view of the sampling frame and transparent graduated tube of this utility model; Figure 3 This is a three-dimensional perspective structural diagram of the sampling frame of this utility model; Figure 4 This is a three-dimensional perspective structural diagram of the disinfection frame of this utility model; Figure 5 This is a front view schematic diagram of the combined sampling frame and disinfection frame of this utility model.

[0022] Figure label: 1. Sampling frame; 2. Transparent graduated tube; 3. Needle; 4. Sterilization frame; 5. Insertion slot; 6. Sterilization tube; 7. Hand rope; 8. External threaded sleeve; 9. Internal thread; 10. Piston; 11. Insertion buckle; 12. Battery; 13. Servo motor; 14. Controller; 15. Driven gear; 16. Moving plate; 17. Lead screw; 18. Transmission gear; 19. Slide bar; 20. Delivery pipe; 21. Water pump; 22. Nozzle; 23. Drain outlet; 24. Operation button; 25. Drive shaft.

[0023] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0024] The present invention provides a quantitative pipette for liquid detection, which will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0025] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0026] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0027] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0028] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0029] like Figures 1 to 5 As shown, an embodiment of this utility model provides a quantitative pipette for liquid detection, including a sampling frame 1 and a sterilization frame 4. The sterilization frame 4 is disposed outside the sampling frame 1. A servo motor 13 is disposed at the center of the top of the sampling frame 1, and the servo motor 13 provides power drive. A drive shaft 25 is installed at the output end of the servo motor 13. A transmission gear 18 is disposed on the surface of the drive shaft 25. A lead screw 17 is movably installed on the inner wall of the sampling frame 1 on one side of the drive shaft 25, and a slide bar 19 is installed on the inner wall of the sampling frame 1 on the other side of the drive shaft 25. A driven gear 15 is provided on the surface of the lead screw 17 on one side of the transmission gear 18, and the transmission gear 18 and the driven gear 15 mesh with each other. A movable plate 16 is provided on the surface of the lead screw 17 on one side of the driven gear 15, and the movable plate 16 is threadedly connected to the lead screw 17. The movable plate 16 is also slidably connected to the slide rod 19. A piston 10 is provided at the bottom end of the movable plate 16. An external threaded sleeve 8 is provided at the center position of the bottom end of the sampling frame 1, and the piston 10 is slidably connected to the external threaded sleeve 8. Insertion buckles 11 are provided at the bottom ends of the sampling frame 1 on both sides of the external threaded sleeve 8.

[0030] The surface of the external threaded sleeve 8 is provided with a transparent graduated tube 2, and the inner wall of the transparent graduated tube 2 is provided with an internal thread 9.

[0031] The internal thread 9 is threadedly connected to the external thread sleeve 8, and a needle 3 is provided at the bottom of the transparent scale tube 2. Two sets of operation buttons 24 are provided on one side wall of the sampling frame 1, and a hand rope 7 is provided on the other side wall of the sampling frame 1.

[0032] Take the transparent graduated tube 2 and fit it onto the surface of the external threaded sleeve 8. Rotate the transparent graduated tube 2 so that it is installed on the surface of the external threaded sleeve 8 through the threaded connection between the internal thread 9 and the external threaded sleeve 8. Take the sampling frame 1 by inserting the four fingers (excluding the thumb) into the hand strap 7 and holding the sampling frame 1 with the four fingers. Press the two sets of operation buttons 24 with the thumb. The two sets of operation buttons 24 correspond to the aspiration and drainage functions, respectively. Place the needle 3... Insert the device into the liquid to be tested and press the operation button 24, which represents suction. This closes the circuit and sends a signal to the controller 14 to start the servo motor 13. The battery 12 provides power to the servo motor 13, the controller 14, and the water pump 21. The servo motor 13 drives the transmission gear 18 to rotate via the drive shaft 25. The meshing of the transmission gear 18 and the driven gear 15 causes the lead screw 17 to rotate via the driven gear 15. The screw 17 rotates along the thread of the moving plate 16. Under the connection, with the sliding engagement of the moving plate 16 and the slide rod 19, the moving plate 16 is moved by the lead screw 17, and the moving plate 16 moves the piston 10 inside the transparent graduated tube 2, creating a negative pressure inside the transparent graduated tube 2. The liquid enters the interior of the transparent graduated tube 2 through the needle 3. The volume of liquid to be aspirated can be determined by the scale on the surface of the transparent graduated tube 2. After reaching the specified volume, the aspiration stops, and then the sampling frame 1 is transferred. Pressing the operation button 24, which represents the discharge, will cause the servo motor 13 to rotate in the reverse direction. Through a series of transmissions, the piston 10 moves in the reverse direction to discharge the liquid in the transparent graduated tube 2 through the needle 3 into the detection dish, thus completing the quantitative liquid transfer. After the aspiration of a certain liquid is completed, the transparent graduated tube 2 is rotated in the reverse direction to remove the transparent graduated tube 2 from the surface of the external threaded sleeve 8 for single use, avoiding secondary use and contamination of other liquid sources. This realizes automatic aspiration and discharge of liquid and facilitates convenient disassembly and assembly of the graduated tube.

[0033] A disinfection tube 6 is provided at the center of the disinfection frame 4. The top of the disinfection frame 4 on both sides of the disinfection tube 6 is provided with a plug groove 5, and the plug buckle 11 can be inserted into the plug groove 5.

[0034] Water pumps 21 are symmetrically arranged on the outer wall of the disinfection tube 6. The water pumps 21 serve as power drives. Each input end of the water pump 21 is provided with a delivery pipe 20. Spray nozzles 22 are symmetrically arranged on the inner wall of the disinfection tube 6. The spray nozzles 22 are connected to the output end of the water pump 21. A drain port 23 is provided on the surface of the disinfection tube 6.

[0035] A battery 12 is installed at the top of the sampling frame 1 on one side of the servo motor 13, and a controller 14 is installed at the top of the sampling frame 1 on the other side of the servo motor 13. The output terminal of the controller 14 is electrically connected to the input terminal of the servo motor 13 and the water pump 21.

[0036] After removing the transparent graduated tube 2, press the sampling frame 1 onto the surface of the disinfection frame 4, so that the plug buckle 11 is inserted into the plug groove 5. The plug buckle 11 provides limiting support for the sampling frame 1 to prevent it from tipping over. At this time, the piston 10 is inserted into the disinfection tube 6. Turn on the water pump 21, and the water pump 21 draws the disinfectant in the disinfection frame 4 through the delivery pipe 20 and sprays it out from the nozzle 22. The disinfectant is sprayed onto the surface of the piston 10 to disinfect the piston 10. The waste liquid after use is discharged through the drain port 23. After the piston 10 is disinfected, the transparent graduated tube 2 can be repositioned to draw and transfer other liquids, which can reduce its usage cost.

[0037] The working principle of the technical solution provided by this utility model is as follows: Take the transparent graduated tube 2, fit the transparent graduated tube 2 onto the surface of the external threaded sleeve 8, rotate the transparent graduated tube 2 to install the transparent graduated tube 2 onto the surface of the external threaded sleeve 8, take the sampling frame 1, the holding posture is to insert the four fingers (excluding the thumb) into the hand strap 7 and hold the sampling frame 1 with the four fingers, and press the two sets of operation buttons 24 with the thumb. The two sets of operation buttons 24 correspond to the aspiration and drainage functions respectively. Insert the needle 3 into the liquid to be tested and press the operation button 24 representing aspiration. When the circuit is closed, the controller 14 sends a signal to turn on the servo motor 13. The servo motor 13 drives the transmission gear 18 to rotate via the drive shaft 25. The transmission gear 18 drives the lead screw 17 to rotate via the driven gear 15. The lead screw 17 drives the moving plate 16 to move. The moving plate 16 drives the piston 10 to move inside the transparent graduated tube 2, creating a negative pressure inside the transparent graduated tube 2. Liquid enters the interior of the transparent graduated tube 2 through the needle 3. The volume of liquid to be drawn can be determined by the scale on the surface of the transparent graduated tube 2. Once the specified volume is reached, drawing stops, and then the liquid is transferred. Sampling frame 1: Pressing the operation button 24 (representing liquid discharge) will cause the servo motor 13 to rotate in reverse. Through a series of transmissions, the piston 10 moves in the reverse direction, discharging the liquid in the transparent graduated tube 2 through the needle 3 into the testing dish, thus completing the quantitative liquid transfer. After the liquid has been aspirated, rotating the transparent graduated tube 2 in the reverse direction will remove it from the surface of the external threaded sleeve 8 for single use, avoiding contamination of other liquid sources during secondary use. After removing the transparent graduated tube 2, press the sampling frame 1 against the sterilization plate. The surface of the frame 4 allows the plug 11 to be inserted into the plug slot 5. The plug 11 provides limiting support for the sampling frame 1 to prevent it from tipping over. At this time, the piston 10 is inserted into the disinfection tube 6. The water pump 21 is turned on, and the water pump 21 draws the disinfectant from the disinfection frame 4 through the delivery pipe 20 and sprays it out from the nozzle 22. The disinfectant is sprayed onto the surface of the piston 10 to disinfect the piston 10. The waste liquid after use is discharged through the drain port 23. After the piston 10 is disinfected, the transparent graduated tube 2 can be repositioned to draw and transfer other liquids, which can reduce its usage cost.

[0038] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A quantitative pipette for liquid detection, comprising a sampling frame (1) and a sterilization frame (4), characterized in that: The sampling frame (1) is provided with a disinfection frame (4) on the outside. A servo motor (13) is provided at the center of the top of the sampling frame (1). A drive shaft (25) is installed at the output end of the servo motor (13). A transmission gear (18) is provided on the surface of the drive shaft (25). A lead screw (17) is movably installed on the inner wall of the sampling frame (1) on one side of the drive shaft (25). A slide rod (19) is installed on the inner wall of the sampling frame (1) on the other side of the drive shaft (25). A driven gear (15) is provided on the surface of the lead screw (17) on one side of the transmission gear (18). The transmission gear (18) and the driven gear (15) mesh with each other. A moving plate (16) is provided on the surface of the lead screw (17) on one side of the driven gear (15). The moving plate (16) is threadedly connected to the lead screw (17). The moving plate (16) is slidably connected to the slide rod (19).

2. The quantitative pipette for liquid detection according to claim 1, characterized in that: A piston (10) is provided at the bottom end of the moving plate (16), and an external threaded sleeve (8) is provided at the center of the bottom end of the sampling frame (1).

3. A quantitative pipette for liquid detection according to claim 2, characterized in that: The piston (10) is slidably connected to the external threaded sleeve (8), and the bottom of the sampling frame (1) on both sides of the external threaded sleeve (8) is provided with a plug buckle (11).

4. A quantitative pipette for liquid detection according to claim 3, characterized in that: The surface of the external threaded sleeve (8) is provided with a transparent scale tube (2), and the inner wall of the transparent scale tube (2) is provided with an internal thread (9).

5. A quantitative pipette for liquid detection according to claim 4, characterized in that: The internal thread (9) is threadedly connected to the external thread sleeve (8), and a needle (3) is provided at the bottom end of the transparent graduated tube (2).

6. A quantitative pipette for liquid detection according to claim 5, characterized in that: Two sets of operation buttons (24) are provided on one side wall of the sampling frame (1), and a hand rope (7) is provided on the other side wall of the sampling frame (1).

7. A quantitative pipette for liquid detection according to claim 6, characterized in that: A disinfection tube (6) is provided at the center of the disinfection frame (4). The top of the disinfection frame (4) on both sides of the disinfection tube (6) is provided with a plug groove (5), and the plug buckle (11) can be inserted into the plug groove (5).

8. A quantitative pipette for liquid detection according to claim 7, characterized in that: Water pumps (21) are symmetrically arranged on the outer wall of the disinfection tube (6), and each water pump (21) has a delivery pipe (20) at its input end.

9. A quantitative pipette for liquid detection according to claim 8, characterized in that: The disinfection tube (6) is symmetrically provided with nozzles (22) on its inner wall, and the nozzles (22) are connected to the output end of the water pump (21). The surface of the disinfection tube (6) is provided with a drain port (23).

10. A quantitative pipette for liquid detection according to claim 9, characterized in that: A battery (12) is provided at the top of the sampling frame (1) on one side of the servo motor (13), and a controller (14) is provided at the top of the sampling frame (1) on the other side of the servo motor (13). The output end of the controller (14) is electrically connected to the input end of the servo motor (13) and the water pump (21).

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