A pipette for medical testing

Abstract

The application relates to the technical field of pipettes, and discloses a pipette for medical examination, which comprises a base, the top surface of the base is fixedly connected with a pipette end shell, the front side of the pipette end shell is fixedly connected with a control handle, the lower portion of the control handle is provided with a test tube device, the inner top end of the pipette end shell is provided with a pipetting mechanism, the top portion of the pipetting mechanism is provided with a maintenance mechanism, the bottom surface of the pipetting mechanism is provided with a container sealing mechanism, the pipetting mechanism comprises a lifting guard plate, the bottom surface of the lifting guard plate is fixedly connected with a bottom bracket, the bottom surface of the bottom bracket is fixedly connected with two hydraulic rods, and the rear end of the lifting guard plate is fixedly connected with a motor. The pipette can realize automatic filling of liquid in the air cylinder, simplify the air pressure structure, facilitate flushing after use of the internal structure, and discharge air through the branch vertical pipes after the air is discharged through the infusion cavity, so that liquid suction and pipetting operations are simultaneously performed on multiple test tubes, and the working efficiency of liquid suction and pipetting is improved.

Description

Technical Field

[0001] This invention relates to the field of pipette technology, specifically to a pipette for medical testing. Background Technology

[0002] In medical testing, pipettes are crucial tools for the precise transfer of liquid samples. However, despite their design for high-precision liquid handling, pipettes can encounter problems during practical use. These problems can lead to errors in experimental results, inaccurate data, and even affect clinical diagnosis or research outcomes. While pipettes are essential tools in medical testing, their use requires adherence to certain guidelines. Problems arising during use can stem from various causes, including equipment malfunction, improper operation, or external environmental influences. To ensure experimental accuracy, regular calibration, proper operation, and timely maintenance of the pipette are necessary.

[0003] Patent CN215087259U discloses a pipette for medical testing, comprising a base, a main body, a sliding box, electronic pipettes, trays, and reagent bottles. The main body is fixedly installed on the rear top of the base, and the sliding box is fixedly installed on the top of the main body. A lifting assembly is provided within the inner cavity of the sliding box. Several electronic pipettes are fixedly connected to the bottom end of the lifting assembly. A sliding assembly is provided at the top of the base, and two trays are placed within the inner cavity of the sliding assembly. Several reagent bottles are inserted into the inner cavity of the trays. This medical testing pipette solves the problem that a pipette can only transfer liquid from one reagent bottle at a time, requiring multiple operations when transferring large amounts of reagents, which is time-consuming and affects the progress of reagent testing. However, this patent also has the problem of complex internal interconnection structures that are inconvenient to rinse. Therefore, this medical testing pipette is proposed to solve the aforementioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a pipette for medical testing, which addresses the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a pipette for medical testing, including a base, a pipetting end shell fixedly connected to the top surface of the base, a control handle fixedly connected to the front side of the pipetting end shell, a test tube container arranged below the control handle, a pipetting mechanism arranged at the top of the inside of the pipetting end shell, a maintenance mechanism arranged at the top of the pipetting mechanism, and a container sealing mechanism arranged at the bottom surface of the pipetting mechanism;

[0006] The pipetting mechanism includes a lifting guard plate, a base frame fixedly connected to the bottom surface of the lifting guard plate, two hydraulic rods fixedly connected to the bottom surface of the base frame, a motor fixedly connected to the rear end of the lifting guard plate, a threaded rod fixedly connected to the end of the motor output shaft, a peristaltic disc fixedly connected to the outer surface of the threaded rod, a peristaltic wheel rotatably connected to the outer edge of the peristaltic disc, a flexible tube tightly fitted to the outer side of the peristaltic wheel, an output tube fixedly connected to one end of the flexible tube, an input tube fixedly connected to the end of the flexible tube away from the output tube, a splined rod threadedly connected to the end of the threaded rod away from the motor, and an air cylinder slidably connected to the outer surface of the splined rod.

[0007] According to the above technical solution, a piston is slidably connected inside the air cylinder, a drain pipe is fixedly connected to the front end of the air cylinder, an infusion chamber is fixedly connected to the bottom end of the drain pipe, multiple branch vertical pipes are fixedly connected to the bottom surface of the infusion chamber, a branch pipe rack is fixedly connected to the bottom end of the multiple branch vertical pipes, a drip tube is fixedly connected to the bottom surface of the branch pipe rack, four auxiliary sliding rods are fixedly connected to the top surface of the branch pipe rack, and a one-way port is fixedly connected to the bottom surface of the air cylinder.

[0008] According to the above technical solution, the lifting guard plate is slidably connected to the inner wall of the pipetting end housing, the hose is fixedly connected to the lifting guard plate, the piston is fixedly connected to the splined rod, the air cylinder is fixedly connected to the lifting guard plate, and the auxiliary slide rod slides through into the interior of the pipetting end housing. When operation begins, the built-in hydraulic device controls the hydraulic rod to retract, causing the base frame connected to the hydraulic rod to move downwards, which in turn moves the connected lifting guard plate downwards. At this time, the air cylinder connected to the lifting guard plate moves downwards together, driving the infusion chamber downwards through the drain pipe connected to the air cylinder. This causes the infusion chamber to push the connected branch vertical pipe downwards, pushing the dropper connected to the bottom of the branch pipe rack closer to the test tube container below. When the motor connected to the lifting guard plate drives the threaded rod to rotate through the output shaft, the threaded rod rotates and pushes the splined rod to slide at the connection point between it and the air cylinder. The splined rod pushes the connected piston to slide along the air cylinder, thus discharging the liquid from the air cylinder. The liquid is unidirectionally transported through the drain pipe into the infusion chamber, then through the infusion chamber into the connected branch riser pipe, and then through the branch riser pipe into the dropper and into the test tube. The motor then rotates, driving the threaded rod to rotate. When the piston moves towards the motor, the rotating threaded rod simultaneously drives the peristaltic disc to rotate. The rotating peristaltic disc, through the connected peristaltic wheel, squeezes the tubing, causing air to move out of the tubing and into the one-way port. The air then enters the air cylinder through the one-way port. As the air pressure inside the tubing decreases, the tubing draws the liquid upwards from the input tube. With the continuous rotation of the peristaltic disc, the liquid in the tubing is unidirectionally transported into the air cylinder. The rotation of the threaded rod drives the piston connected to the splined rod, simultaneously causing the peristaltic disc and peristaltic wheel to work with the tubing to guide the liquid into the air cylinder, achieving automatic filling of the air cylinder and simplifying the air pressure structure for easy rinsing after use.

[0009] According to the above technical solution, the maintenance mechanism includes a liquid-passing end pipe, a lubrication tank is fixedly connected to the top of the liquid-passing end pipe, a partition baffle is fixedly connected inside the air cylinder, a side valve is fixedly connected to the side of the partition baffle, a single-way valve is fixedly connected to the top of the air cylinder, a lubrication chamber is provided on the rear side of the partition baffle, and two lubrication pipes are fixedly connected to the rear side of the air cylinder.

[0010] According to the above technical solution, the lubricating tank and the liquid inlet pipe are interconnected, the single-way valve and the air cylinder are interconnected, the liquid inlet pipe and the air cylinder are fixedly connected, a return spring is provided between the piston and the partition plate, and the two ends of the return spring are fixedly connected to the piston and the partition plate respectively. The end of the root lubricating pipe away from the air cylinder is connected to the inside of the hydraulic rod. The air cylinder and the root lubricating pipe are interconnected. When the piston slides through the partition plate via the connected spline rod, the space between the partition plate and the piston is compressed, and the return spring between the partition plate and the piston is squeezed. Applying pressure to the piston causes it to press against the inner wall of the cylinder, increasing the structural seal between the cylinder and the piston. Air between the separator and the piston is discharged into the lubrication chamber through the side valve on the separator. As lubricant is discharged unidirectionally into the lubrication chamber through the liquid inlet pipe, as more air is discharged into the lubrication chamber through the side valve, some of the liquid in the lubrication chamber is discharged into the lubrication pipe along with the air. The liquid in the lubrication pipe lubricates the hydraulic rod or auxiliary slide rod, reducing wear between parts and minimizing the impact of wear damage on the hydraulic rod's normal operation.

[0011] According to the above technical solution, the container sealing mechanism includes a rubber rod, a pressure frame is slidably connected to the bottom end of the rubber rod, a short pressure rod is fixedly connected to the end of the pressure frame away from the rubber rod, a positioning piece is slidably connected to the outer surface of the short pressure rod, a sealing cap is fixedly connected to the bottom end of the short pressure rod, a test liquid container is provided at the bottom of the sealing cap, guide blocks are provided on both sides of the top of the test liquid container, and a connecting end is fixedly connected to the bottom of the inside of the test liquid container.

[0012] According to the above technical solution, a plug rod is slidably connected inside the connecting end, a sealing opening is provided on the outer rear end of the plug rod, a drainage groove is provided on the outer front end of the plug rod, and a top plate is provided on the front side of the plug rod.

[0013] According to the above technical solution, the positioning plate is fixedly connected to the inner wall of the pipette end shell, the sealing cap is slidably connected to the pipette end shell, a spring spring is provided on the outer side of the short pressure rod, and the two ends of the spring spring are fixedly connected to the positioning plate and the sealing cap respectively. The top plate is fixedly connected to the inner wall of the bottom end of the input tube, and a connecting spring is provided on the outer side of the plug rod, and the two ends of the connecting spring are fixedly connected to the connecting end and the plug rod respectively. When the hydraulic rod retracts, the downward movement of the hydraulic rod drives the rubber rod to move downward. The pressure on the rubber rod pushes the connected pressure frame to slide downward along the connection point of the positioning plate through the short pressure rod, allowing the short pressure rod to push the sealing cap downward towards the test liquid container. The top is connected to a tension spring. When the test liquid container and the sealing cap are fully fitted, the sealing cap positions the test liquid container while simultaneously squeezing it downwards to seal the interior, reducing the influence of the external environment on the internal test liquid. Furthermore, the connecting end on the test liquid container connects to the bottom of the input tube, causing the top plate inside the input tube to press against the stopper rod. Under pressure, the stopper rod slides along the connection point of the connecting end, compressing the connecting spring. The movement of the stopper rod removes the obstruction from the connecting end, allowing communication between the input tube and the interior of the test liquid container. This plug-in connection method enhances the flexibility of disassembling the test liquid container.

[0014] The present invention, by adopting the above technical solution, can bring the following beneficial effects:

[0015] This invention comprises a lifting guard plate, a base frame, a hydraulic rod, a motor, a peristaltic disc, a peristaltic wheel, a hose, an output pipe, an input pipe, a threaded rod, a splined rod, an air cylinder, a piston, a drain pipe, an infusion chamber, branch risers, a branch pipe rack, and a dropper. The rotation of the threaded rod drives the piston connected to the splined rod, while the peristaltic disc and wheel, in conjunction with the hose, guide liquid into the air cylinder, achieving automatic filling of the air cylinder. This simplifies the pneumatic structure, facilitates rinsing of the internal structure after use, and allows air to be expelled from the infusion chamber and diverted through the branch risers, enabling simultaneous aspiration and transfer operations on multiple test tubes, thus improving the efficiency of aspiration and transfer.

[0016] This invention, by incorporating a liquid inlet pipe, a baffle plate, a one-way valve, a lubrication tank, a lubrication pipe, a side valve, and a lubrication chamber, lubricates the hydraulic rod or auxiliary slide rod with liquid within the lubrication pipe. This reduces wear between parts, minimizes the impact of wear and damage to the hydraulic rod on normal liquid transfer, extends the overall service life of the equipment, and reduces the hassle of manual maintenance.

[0017] This invention comprises a rubber rod, a pressure frame, a short pressure rod, a positioning plate, a sealing cap, a guide block, a test liquid container, a connecting end, a stopper rod, and a connecting seal. When the stopper rod is pressed, it slides along the connection point of the connecting end and compresses the connecting spring. The movement of the stopper rod prevents the connecting seal from being blocked by the connecting end, thus achieving communication between the input tube and the inside of the test liquid container. This plug-in connection method improves the flexibility of disassembling the test liquid container, facilitating cleaning and use, and making it easier for the liquid inside the test liquid container to be completely discharged through the input tube. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall rear-view three-dimensional structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the structural distribution of the mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the pipetting mechanism of the present invention;

[0022] Figure 5 For the present invention Figure 4 A magnified structural diagram of A in the middle;

[0023] Figure 6 This is a schematic diagram of the maintenance mechanism structure of the present invention;

[0024] Figure 7 For the present invention Figure 6 A magnified structural diagram of B in the diagram;

[0025] Figure 8 This is a schematic diagram of the container sealing mechanism of the present invention;

[0026] Figure 9 This is a schematic diagram of the plug rod connection structure of the present invention.

[0027] In the diagram: 1. Base; 2. Pipette end cover; 3. Control handle; 4. Test tube / glassware; 5. Pipette mechanism; 51. Lifting guard plate; 52. Base frame; 53. Hydraulic rod; 54. Motor; 55. Peristaltic disc; 56. Peristaltic wheel; 57. Tube; 58. Output tube; 59. Input tube; 510. Threaded rod; 511. Splined rod; 512. Air pump; 513. Piston; 514. Drain tube; 515. Infusion chamber; 516. Branch riser; 517. Branch tube rack; 518. Dropper; 519 9. Auxiliary slide bar; 520. One-way port; 6. Maintenance mechanism; 61. Liquid inlet pipe; 62. Divider baffle; 63. One-way valve; 64. Lubricating tank; 65. Lubricating pipe; 66. Side valve; 67. Lubricating chamber; 7. Container sealing mechanism; 71. Rubber rod; 72. Pressure frame; 73. Short pressure rod; 74. Positioning plate; 75. Sealing cap; 76. Guide block; 77. Test liquid container; 78. Connecting end; 79. Plug rod; 710. Connecting seal; 711. Drainage trough; 712. Top plate. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-9 One embodiment of the present invention is: a pipette for medical testing, including a base 1, a pipetting end shell 2 fixedly connected to the top surface of the base 1, a control handle 3 fixedly connected to the front side of the pipetting end shell 2, a test tube 4 disposed below the control handle 3, a pipetting mechanism 5 disposed at the top inside the pipetting end shell 2, a maintenance mechanism 6 disposed at the top of the pipetting mechanism 5, and a container sealing mechanism 7 disposed at the bottom surface of the pipetting mechanism 5;

[0030] The pipetting mechanism 5 includes a lifting guard plate 51, a base frame 52 fixedly connected to the bottom surface of the lifting guard plate 51, two hydraulic rods 53 fixedly connected to the bottom surface of the base frame 52, a motor 54 fixedly connected to the rear end of the lifting guard plate 51, a threaded rod 510 fixedly connected to the end of the output shaft of the motor 54, a peristaltic disc 55 fixedly connected to the outer surface of the threaded rod 510, a peristaltic wheel 56 rotatably connected to the outer edge of the peristaltic disc 55, a hose 57 tightly fitted to the outer side of the peristaltic wheel 56, an output tube 58 fixedly connected to one end of the hose 57, an input tube 59 fixedly connected to the end of the hose 57 away from the output tube 58, a splined rod 511 threadedly connected to the end of the threaded rod 510 away from the motor 54, and an air cylinder 512 slidably connected to the outer surface of the splined rod 511.

[0031] The air cylinder 512 has a piston 513 slidably connected inside. The front end of the air cylinder 512 is fixedly connected to a drain pipe 514. The bottom end of the drain pipe 514 is fixedly connected to an infusion chamber 515. The bottom surface of the infusion chamber 515 is fixedly connected to multiple branch vertical pipes 516. The bottom end of the multiple branch vertical pipes 516 is fixedly connected to a branch pipe rack 517. The bottom surface of the branch pipe rack 517 is fixedly connected to a drip tube 518. The top surface of the branch pipe rack 517 is fixedly connected to four auxiliary sliding rods 519. The bottom surface of the air cylinder 512 is fixedly connected to a one-way port 520.

[0032] The lifting guard plate 51 is slidably connected to the inner wall of the pipette end housing 2. The hose 57 is fixedly connected to the lifting guard plate 51. The piston 513 is fixedly connected to the splined rod 511. The air cylinder 512 is fixedly connected to the lifting guard plate 51. The auxiliary slide rod 519 slides through the interior of the pipette end housing 2. The drain pipe 514 connected to the air cylinder 512 drives the infusion chamber 515 to move downward, causing the infusion chamber 515 to push the connected branch vertical pipe 516 downward, pushing the bottom of the branch pipe rack 517 connected to the dropper 518 closer to the test tube container 4 below. When the lifting guard plate... The motor 54 connected to 51 drives the threaded rod 510 to rotate via its output shaft. This rotation of the threaded rod 510 pushes the splined rod 511 to slide at the connection point with the air cylinder 512. The splined rod 511 pushes the connected piston 513 to slide along the air cylinder 512, thus conveying the liquid in the air cylinder 512 unidirectionally through the drain pipe 514 to the infusion chamber 515. From there, the liquid is conveyed through the infusion chamber 515 to the connected branch riser pipe 516, and then flows through the branch riser pipe 516 into the dropper 518, ultimately draining into the test tube in the test tube container 4. The motor then... When motor 54 rotates, it drives the threaded rod 510 to rotate, causing the piston 513 to move closer to the motor 54. Simultaneously, the rotation of the threaded rod 510 drives the peristaltic disc 55 to rotate. This rotation of the peristaltic disc 55, through the connected peristaltic wheel 56, squeezes the hose 57, causing air inside the hose 57 to move and be expelled into the one-way port 520. The air then enters the air cylinder 512 through the one-way port 520. As the air pressure inside the hose 57 decreases, the hose 57 draws liquid upwards from the input pipe 59. With the continuous rotation of the peristaltic disc 55, the liquid in the hose 57 is further drawn upwards. The liquid is unidirectionally delivered into the air cylinder 512 through the hose 57. The rotation of the threaded rod 510 drives the piston 513 connected to the spline rod 511. At the same time, the peristaltic disc 55 and peristaltic wheel 56 work with the hose 57 to guide the liquid into the air cylinder 512, realizing the automatic filling of the liquid in the air cylinder 512. This simplifies the air pressure structure and facilitates the rinsing of the internal structure after use. After the air is discharged through the infusion chamber 515, it is diverted through the branch vertical pipe 516 to perform liquid aspiration and transfer operations on multiple test tubes at the same time, thereby improving the efficiency of liquid aspiration and transfer.

[0033] The maintenance mechanism 6 includes a liquid inlet pipe 61, a lubrication tank 64 fixedly connected to the top of the liquid inlet pipe 61, a partition baffle 62 fixedly connected inside the air cylinder 512, a side valve 66 fixedly connected to the side of the partition baffle 62, a single valve 63 fixedly connected to the top of the air cylinder 512, a lubrication chamber 67 provided on the rear side of the partition baffle 62, and two lubrication pipes 65 fixedly connected to the rear side of the air cylinder 512.

[0034] The lubricating tank 64 is connected to the liquid inlet pipe 61, and the single-way valve 63 is connected to the air cylinder 512. The liquid inlet pipe 61 is fixedly connected to the air cylinder 512. A return spring is provided between the piston 513 and the partition plate 62, and the two ends of the return spring are fixedly connected to the piston 513 and the partition plate 62 respectively. The end of the root lubricating pipe 65 away from the air cylinder 512 is connected to the inside of the hydraulic rod 53. The air cylinder 512 is connected to the root lubricating pipe 65. The return spring applies pressure to the piston 513, causing the piston 513 to be forced to fit against the inner wall of the air cylinder 512, increasing the structural sealing between the air cylinder 512 and the piston 513. The partition plate 614 is connected to the partition plate 62. Air between piston 513 and 2 is discharged into lubrication chamber 67 through side valve 66 on baffle 62. As lubricant is discharged into lubrication chamber 67 through liquid pipe 61, as more air is discharged into lubrication chamber 67 through side valve 66, liquid in lubrication chamber 67 is discharged into lubrication pipe 65 along with some air. The liquid in lubrication pipe 65 lubricates the hydraulic rod 53 or auxiliary slide rod 519, which can reduce wear between parts, reduce the impact of wear and damage to hydraulic rod 53 on normal use of liquid transfer, improve the overall service life of equipment and reduce the trouble of manual maintenance.

[0035] The container sealing mechanism 7 includes a rubber rod 71, a pressure frame 72 slidably connected to the bottom end of the rubber rod 71, a short pressure rod 73 fixedly connected to the end of the pressure frame 72 away from the rubber rod 71, a positioning piece 74 slidably connected to the outer surface of the short pressure rod 73, a sealing cap 75 fixedly connected to the bottom end of the short pressure rod 73, a test liquid container 77 provided at the bottom of the sealing cap 75, guide blocks 76 provided on both sides of the top of the test liquid container 77, and a connecting end 78 fixedly connected to the bottom of the inside of the test liquid container 77.

[0036] A stopper rod 79 is slidably connected inside the connecting end 78. A connecting seal 710 is opened on the outer side of the rear end of the stopper rod 79, a drain groove 711 is opened on the outer side of the front end of the stopper rod 79, and a top plate 712 is provided on the front side of the stopper rod 79.

[0037] The positioning plate 74 is fixedly connected to the inner wall of the pipette end shell 2, and the sealing cap 75 is slidably connected to the pipette end shell 2. A spring is provided on the outer side of the short pressure rod 73, and the two ends of the spring are fixedly connected to the positioning plate 74 and the sealing cap 75 respectively. The top plate 712 is fixedly connected to the inner wall of the bottom end of the input tube 59. A connecting spring is provided on the outer side of the plug rod 79, and the two ends of the connecting spring are fixedly connected to the connecting end 78 and the plug rod 79 respectively. While the sealing cap 75 positions the test liquid container 77, it also presses the test liquid container 77 downwards to seal the inside of the test liquid container 77. To reduce the impact of the external environment on the internal test solution, the connection end 78 on the test solution container 77 is connected to the bottom of the input tube 59, causing the top plate 712 inside the input tube 59 to press the stopper rod 79. After being compressed, the stopper rod 79 slides along the connection end 78 and compresses the connecting spring. The movement of the stopper rod 79 prevents the sealing opening 710 from being blocked by the connection end 78, thus achieving communication between the input tube 59 and the inside of the test solution container 77. The plug-in connection method improves the disassembly flexibility of the test solution container 77, making it easier to clean and use, and facilitating the complete discharge of liquid from the test solution container 77 through the input tube 59.

[0038] Working principle: At startup, the built-in hydraulic device controls the retraction of the hydraulic rod 53, causing the base frame 52 connected to the hydraulic rod 53 to move downwards, which in turn moves the connected lifting guard plate 51 downwards. At this time, the air cylinder 512 connected to the lifting guard plate 51 moves downwards as well. Through the drain pipe 514 connected to the air cylinder 512, the infusion chamber 515 moves downwards, causing the infusion chamber 515 to push the connected branch vertical pipe 516 downwards, pushing the bottom of the branch pipe rack 517, connected to the dropper 518, closer to the test tube container 4 below. When the lifting guard plate 51... The motor 54 drives the threaded rod 510 to rotate via the output shaft. This rotation pushes the splined rod 511 to slide at the connection point with the air cylinder 512. The splined rod 511 pushes the connected piston 513 to slide along the air cylinder 512, thus conveying the liquid in the air cylinder 512 unidirectionally through the drain pipe 514 to the infusion chamber 515. From there, the liquid is conveyed through the infusion chamber 515 to the connected branch vertical pipe 516, and then flows through the branch vertical pipe 516 into the dropper 518, ultimately draining into the test tube in the test tube container 4. The motor 54 then flips... When the screw rod 510 rotates, causing the piston 513 to move closer to the motor 54, the rotation of the screw rod 510 simultaneously drives the peristaltic disc 55 to rotate. This rotation of the peristaltic disc 55, through the connected peristaltic wheel 56, squeezes the hose 57, causing air inside the hose 57 to move and be expelled into the one-way port 520. The air then enters the air cylinder 512 through the one-way port 520. As the air pressure inside the hose 57 decreases, the hose 57 draws liquid upwards from the input pipe 59. With the continuous rotation of the peristaltic disc 55, the liquid in the hose 57 is then expelled through... The liquid is unidirectionally delivered to the air cylinder 512 through the hose 57. The rotation of the threaded rod 510 drives the piston 513 connected to the spline rod 511. At the same time, the peristaltic disc 55 and peristaltic wheel 56 work with the hose 57 to guide the liquid into the air cylinder 512, realizing the automatic filling of the liquid in the air cylinder 512. This simplifies the air pressure structure and facilitates the rinsing of the internal structure after use. After the air is discharged through the infusion chamber 515, it is diverted through the branch vertical pipe 516 so that multiple test tubes can be aspirated and pipetted at the same time, improving the efficiency of aspiration and pipetting.

[0039] When piston 513 slides through partition plate 62 via connecting spline rod 511, the space between partition plate 62 and piston 513 is compressed, squeezing the return spring between partition plate 62 and piston 513. The return spring applies pressure to piston 513, causing piston 513 to be forced to adhere to the inner wall of air cylinder 512, increasing the structural seal between air cylinder 512 and piston 513. Air between partition plate 62 and piston 513 is discharged into lubrication chamber 67 through side valve 66 on partition plate 62. Inside, lubricating fluid is discharged unidirectionally into the lubricating chamber 67 through the liquid inlet pipe 61. As the air discharged into the lubricating chamber 67 by the side valve 66 increases, the liquid in the lubricating chamber 67, along with some air, is discharged into the lubricating pipe 65. The liquid in the lubricating pipe 65 lubricates the hydraulic rod 53 or the auxiliary slide rod 519, which can reduce wear between parts, reduce the impact of wear and damage to the hydraulic rod 53 on the normal use of fluid transfer, improve the overall service life of the equipment, and reduce the trouble of manual maintenance.

[0040] When the hydraulic rod 53 retracts, it moves downward, causing the rubber rod 71 to move downward. The pressure on the rubber rod 71 pushes the connected pressure frame 72 downward along the connection point of the positioning piece 74 via the short pressure rod 73. This pushes the sealing cap 75 downward towards the top of the test liquid container 77 and stretches the spring. When the test liquid container 77 is fully engaged with the sealing cap 75, the sealing cap 75 positions the test liquid container 77 while simultaneously squeezing it downward, sealing the interior of the test liquid container 77 and reducing external pressure on the internal test liquid. In addition to the influence of the external environment, by connecting the end 78 on the test liquid container 77 to the bottom of the input tube 59, the top plate 712 inside the input tube 59 squeezes the stopper rod 79. After being compressed, the stopper rod 79 slides along the connection of the end 78 and compresses the connecting spring. The movement of the stopper rod 79 makes the sealing opening 710 no longer blocked by the end 78, thus realizing the connection between the input tube 59 and the inside of the test liquid container 77. The plug-in connection method can improve the disassembly flexibility of the test liquid container 77, so as to facilitate the cleaning and use of the test liquid container 77, and make it easier for the liquid in the test liquid container 77 to be completely discharged through the input tube 59.

[0041] This invention provides a pipette for medical testing. Many methods and approaches exist to implement this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A pipette for medical tests, comprising a base (1), characterized in that: The top surface of the base (1) is fixedly connected with a pipetting end shell (2), the front side of the pipetting end shell (2) is fixedly connected with a control handle (3), the lower side of the control handle (3) is provided with a test tube vessel (4), the inner top end of the pipetting end shell (2) is provided with a pipetting mechanism (5), the top of the pipetting mechanism (5) is provided with a curing mechanism (6), and the bottom surface of the pipetting mechanism (5) is provided with a container sealing mechanism (7); The pipetting mechanism (5) comprises a lifting guard plate (51), the bottom surface of the lifting guard plate (51) is fixedly connected with a chassis (52), the bottom surface of the chassis (52) is fixedly connected with two hydraulic rods (53), the rear end of the lifting guard plate (51) is fixedly connected with a motor (54), the output shaft end of the motor (54) is fixedly connected with a threaded rod (510), the outer surface of the threaded rod (510) is fixedly connected with a peristaltic disc (55), the outer side edge of the peristaltic disc (55) is rotatably connected with a peristaltic wheel (56), the outer side of the peristaltic wheel (56) is closely attached with a hose (57), one end of the hose (57) is fixedly connected with an output pipe (58), the end of the hose (57) away from the output pipe (58) is fixedly connected with an input pipe (59), and the end of the threaded rod (510) away from the motor (54) is threadedly connected with a spline rod (511), the outer surface of the spline rod (511) is slidably connected with an air cylinder (512); The inside of the air cylinder (512) is slidably connected with a piston (513), the front end of the air cylinder (512) is fixedly connected with a liquid discharge pipe (514), and the bottom surface of the air cylinder (512) is fixedly connected with a one-way port (520); The curing mechanism (6) comprises a liquid passing end pipe (61), the top end of the liquid passing end pipe (61) is fixedly connected with a liquid moistening tank (64), the inside of the air cylinder (512) is fixedly connected with a separation baffle (62), the side surface of the separation baffle (62) is fixedly connected with a side passing valve (66), the top surface of the air cylinder (512) is fixedly connected with a single-pass valve (63), the rear side of the separation baffle (62) is provided with a liquid moistening cavity (67), and the rear side surface of the air cylinder (512) is fixedly connected with two liquid moistening pipes (65); the one-way port (520) is provided with a one-way petal inside, and the liquid discharge pipe (514) is also provided with a one-way petal inside; The liquid moistening tank (64) and the liquid passing end pipe (61) are in communication with each other, the single-pass valve (63) and the air cylinder (512) are in communication with each other, the liquid passing end pipe (61) and the air cylinder (512) are fixedly connected, a reset spring is arranged between the piston (513) and the separation baffle (62), and the two ends of the reset spring are fixedly connected with the piston (513) and the separation baffle (62) respectively, one end of the two liquid moistening pipes (65) away from the air cylinder (512) is in communication with the inside of the hydraulic rod (53), the air cylinder (512) and the two liquid moistening pipes (65) are in communication with each other, and the liquid passing end pipe (61) and the single-pass valve (63) and the side passing valve (66) are all provided with a one-way petal inside.

2. A pipette for medical testing according to claim 1, characterized in that: The bottom end of the drainage pipe (514) is fixedly connected with a transfusion cavity (515), the bottom surface of the transfusion cavity (515) is fixedly connected with a plurality of branch vertical pipes (516), the bottom ends of the plurality of branch vertical pipes (516) are fixedly connected with a branch pipe support (517), the bottom surface of the branch pipe support (517) is fixedly connected with a drip pipe (518), and the top surface of the branch pipe support (517) is fixedly connected with four auxiliary sliding rods (519).

3. A pipette for medical testing according to claim 2, characterized in that: The lifting guard plate (51) is in sliding connection with the inner wall of the pipette end shell (2), the hose (57) is fixedly connected with the lifting guard plate (51), the piston (513) is fixedly connected with the spline rod (511), the air cylinder (512) is fixedly connected with the lifting guard plate (51), and the auxiliary sliding rod (519) slides through the inside of the pipette end shell (2).

4. A pipette for medical testing according to claim 3, characterized in that: The container sealing mechanism (7) comprises a rubber rod (71), the bottom end of the rubber rod (71) is in sliding connection with a pressure applying frame (72), one end of the pressure applying frame (72) away from the rubber rod (71) is fixedly connected with a short pressure rod (73), the outer surface of the short pressure rod (73) is in sliding connection with a positioning sheet (74), the bottom end of the short pressure rod (73) is fixedly connected with a sealing cover (75), the bottom of the sealing cover (75) is provided with a test liquid container (77), the top end of the test liquid container (77) is provided on both sides with a guide insertion block (76), and the inside of the bottom end of the test liquid container (77) is fixedly connected with a connecting end head (78).

5. A pipette for medical testing according to claim 4, characterized in that: The inside of the connecting end head (78) is in sliding connection with a plug rod (79), the rear end of the plug rod (79) is provided on the outer side with a continuous seal (710), the front end of the plug rod (79) is provided on the outer side with a drainage groove (711), and the front side of the plug rod (79) is provided with a top sheet (712).

6. A pipette for medical testing according to claim 5, characterized in that: The positioning sheet (74) is fixedly connected with the inner wall of the pipette end shell (2), the sealing cover (75) is in sliding connection with the pipette end shell (2), the outer side of the short pressure rod (73) is provided with an elastic spring, both ends of the elastic spring are fixedly connected with the positioning sheet (74) and the sealing cover (75), the top sheet (712) is fixedly connected with the inner wall of the bottom end of the input pipe (59), the outer side of the plug rod (79) is provided with a communication spring, and both ends of the communication spring are fixedly connected with the connecting end head (78) and the plug rod (79).

Images