Optical detection device for a medical bioanalyser

Abstract

This invention relates to the field of medical biochemical analysis technology, and discloses an optical detection device for a medical biochemical analyzer, including a base and a top plate. A support column is rotatably connected to the upper surface of the base, and a rotating worktable is fixedly connected to the upper surface of the support column. A stirring mechanism is disposed on the lower surface of the top plate. A clamp is rotatably connected inside the rotating worktable, and a cuvette is clamped and fixed inside the clamp. A sleeve is fixedly connected to the upper surface of the base, and a gear one is fixedly connected to the upper surface of the sleeve. A gear two is fixedly connected to the lower surface of the clamp, with the tooth ends of gear one meshing with the tooth ends of gear two. The optical detection mechanism is disposed on the upper surface of the base. By fixing gear one and engaging gear two, which revolves with the clamp, the cuvette rotates on its own axis while revolving with the worktable. Using purely mechanical transmission to achieve the rotation of the cuvette not only enhances the mixing effect but also avoids uneven local concentrations of reagents.

Description

Technical Field

[0001] This invention relates to the field of medical biochemical analysis technology, specifically to an optical detection device for a medical biochemical analyzer. Background Technology

[0002] Medical biochemical analyzers, as core testing equipment in clinical diagnosis, biomedical research, and public health screening, directly impact the accuracy of disease diagnosis, the scientific rigor of treatment evaluation, and the early warning effectiveness of health risks. The core function of this equipment is to quantitatively or qualitatively analyze various biochemical indicators (such as blood glucose, liver function indicators, kidney function indicators, and electrolytes) in biological samples like human blood, urine, and cerebrospinal fluid using specific optical detection principles. This transforms abstract biological sample information into interpretable test data, providing clinicians with a solid scientific basis for developing treatment plans and monitoring disease progression. It also provides crucial technical support for basic biomedical research and drug development, making it an indispensable key infrastructure in the modern medical system.

[0003] As a core component of medical biochemical analyzers, the optical detection device is crucial in determining the equipment's detection accuracy, operational stability, and efficiency. Its structural design, component selection, and operational logic directly impact the overall performance and application value of the analyzer. Currently, most mainstream medical biochemical analyzers on the market employ a "stage-driven cuvette movement" structure. Through precise stage displacement, the cuvettes carrying the sample and reagent mixture sequentially pass through the optical detection channel, enabling continuous batch detection of multiple samples and indicators. This design largely meets the needs of efficient, batch sample processing in routine clinical testing and is widely used in laboratory departments of medical institutions at all levels.

[0004] However, most current devices rely on independently designed stirring mechanisms for mixing, resulting in a relatively simple mixing method. This typically involves mechanical or vibration stirring, which can easily lead to uneven reagent concentrations and insufficient mixing of samples and reagents. Especially in batch continuous testing scenarios, the increased workload on the stirring mechanism amplifies these deficiencies, causing differences in the reaction degree of the mixture in different cuvettes and consequently affecting the repeatability and reliability of the test results. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an optical detection device for a medical biochemical analyzer, which solves the problem that single mechanical stirring or vibration stirring modes are prone to uneven local reagent concentrations, especially in batch continuous testing scenarios, affecting the repeatability and reliability of test results.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an optical detection device for a medical biochemical analyzer, comprising a base and a top plate. A support column is rotatably connected to the upper surface of the base, and a rotating worktable is fixedly connected to the upper surface of the support column. A stirring mechanism is provided on the lower surface of the top plate. A clamp is rotatably connected inside the rotating worktable, and a colorimetric cup is clamped and fixed inside the clamp. A sleeve is fixedly connected to the upper surface of the base, and the sleeve is fitted onto the outer wall of the support column. A gear one is fixedly connected to the upper surface of the sleeve, and a gear two is fixedly connected to the lower surface of the clamp. The tooth end of gear one meshes with the tooth end of gear two. An optical detection mechanism is provided on the upper surface of the base, and a sample dispensing gun is fixedly connected to the lower surface of the top plate.

[0007] Preferably, the stirring mechanism includes an electric push rod, the upper surface of which is fixedly connected to the lower surface of the top plate, the output end of which is fixedly connected to a motor, and the output end of which is fixedly connected to a stirring rod.

[0008] Preferably, the optical detection mechanism includes a light source and a detector, the lower surfaces of which are fixedly connected to the upper surface of the base.

[0009] Preferably, a slide rod is slidably connected through and inside the rotating worktable, a magnetic block one is fixedly connected to the bottom end of the slide rod, a cleaning scraper is fixedly connected to the outer wall of the slide rod, the cleaning scraper is in contact with the outer wall of the colorimetric cup, and a magnetic block two is fixedly connected to the upper surface of the base, the magnetic blocks one and the magnetic blocks two repel each other.

[0010] Preferably, an electric push rod two is fixedly connected to the lower surface of the top plate, a connecting rod is fixedly connected to the output end of the electric push rod two, a motor two is fixedly connected to the bottom end of the connecting rod, a hollow cylinder is fixedly connected to the output end of the motor two, and a cleaning brush is fixedly connected to the outer wall of the hollow cylinder.

[0011] Preferably, a movable seat is fixedly connected to the lower surface of the top plate, and a pipette is fixedly connected to the slider portion of the movable seat.

[0012] Preferably, a slide rail is fixedly connected to the outer wall of the electric push rod, a protective shell is slidably connected to the outer wall of the slide rail, a connecting rod is rotatably connected inside the protective shell, and the other end of the connecting rod is rotatably connected to the outer wall of the motor.

[0013] Preferably, the outer wall of the protective shell is fixedly connected to a water inlet pipe and a water outlet pipe, the water inlet pipe is fixedly connected to a cleaning and disinfection solution tank, the outer wall of the water outlet pipe is fixedly connected to a wastewater tank, and the upper surfaces of the wastewater tank and the cleaning and disinfection solution tank are both fixedly connected to the lower surface of the top plate.

[0014] Preferably, a cylinder is fixedly connected to the lower surface of the top plate, a piston plate is slidably connected inside the cylinder, the piston plate is fixedly connected to the outer wall of the connecting rod, an inlet pipe and a drain hose are fixedly connected to the outer wall of the cylinder, the inlet pipe is fixedly connected to the cleaning and disinfection liquid tank, the outer wall of the drain hose is fixedly connected to the hollow cylinder, and a nozzle is fixedly connected to the outer wall of the hollow cylinder.

[0015] Preferably, both the inlet pipe and the outlet pipe are equipped with a one-way valve.

[0016] This invention provides an optical detection device for a medical biochemical analyzer. It has the following beneficial effects: 1. This invention uses a fixed gear one that meshes with a gear two that revolves with the fixture, causing the cuvette to rotate on its own axis while revolving with the worktable. This structure utilizes purely mechanical transmission to achieve the rotation of the cuvette, which not only enhances the mixing effect and avoids uneven local concentrations of reagents, but also prevents problems such as precipitation during transfer after mixing.

[0017] 2. This invention utilizes the magnetic repulsion between magnetic block one and magnetic block two to automatically push the sliding rod and cleaning scraper to adhere to the outer wall of the cuvette during rotation, and then reset by gravity after removal. This design requires no additional power unit and can automatically clean the outer wall of the cuvette during operation, effectively preventing dirt from interfering with the optical path and improving detection accuracy.

[0018] 3. This invention connects the protective shell to the motor via a linkage mechanism, enabling the protective shell to open and close automatically when the stirring rod is raised or lowered. It also allows for the injection of cleaning and disinfecting solution into the shell for rinsing. This design automatically seals and cleans the stirring rod when stirring different samples, preventing cross-contamination, and is integrated into the existing lifting mechanism, eliminating the need for additional independent operating steps.

[0019] 4. This invention uses an electric push rod two to drive a hollow cylinder and a cleaning brush deep into the colorimetric cup. Combined with the reciprocating rotation driven by motor two and the up-and-down movement of the cleaning brush, it achieves thorough cleaning of the inner wall. At the same time, the hollow cylinder can simultaneously deliver cleaning and disinfecting solution. The cleaning solution is evenly sprayed onto the cleaning brush and the inner wall of the cup through the nozzle, enhancing the cleaning effect. This invention solves the technical problems of existing inner wall cleaning devices that are not thorough in cleaning, easily leave dirt residue, and affect subsequent testing. Moreover, the cleaning process is automated, reducing the intensity of manual labor. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a partial structural diagram of the clamp of the present invention; Figure 3 This is a partial structural diagram of the slide bar of the present invention; Figure 4This is a partial structural diagram of the stirring rod of the present invention; Figure 5 This is a partial structural diagram of the protective shell of the present invention; Figure 6 This is a partial structural diagram of the cylindrical part of the present invention; Figure 7 This is a cross-sectional view of the internal structure of the cylinder of the present invention; Figure 8 This is a partial structural diagram of the connecting rod of the present invention.

[0021] The components include: 1. Base; 2. Top plate; 3. Support column; 4. Rotary worktable; 5. Stirring mechanism; 501. Electric push rod one; 502. Motor one; 503. Stirring rod; 6. Fixture; 7. Colorimetric cup; 8. Gear one; 9. Gear two; 10. Optical inspection mechanism; 1001. Light source; 1002. Detector; 11. Slide rod; 12. Cleaning scraper; 13. Magnetic block one; 14. Magnetic block two; 15. 16. Sample dispensing gun; 17. Electric push rod II; 18. Connecting rod; 19. Motor II; 20. Hollow cylinder; 21. Cleaning brush; 22. Moving base; 23. Pipette; 24. Protective housing; 25. Slide rail; 26. Connecting rod; 27. Water inlet pipe; 28. Drain pipe; 29. ​​Wastewater tank; 30. Cleaning and disinfection solution tank; 31. Cylinder; 32. Piston plate; 33. Liquid inlet pipe; 34. Drain hose; 35. Nozzle. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described 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.

[0023] Please see the appendix Figure 1 -Appendix Figure 3 This invention provides an optical detection device for a medical biochemical analyzer, including a base 1 and a top plate 2. A support column 3 is rotatably connected to the upper surface of the base 1, and a rotating worktable 4 is fixedly connected to the upper surface of the support column 3. A stirring mechanism 5 is provided on the lower surface of the top plate 2. A clamp 6 is rotatably connected inside the rotating worktable 4, and a colorimetric cup 7 is clamped and fixed inside the clamp 6. A sleeve is fixedly connected to the upper surface of the base 1, and the sleeve is fitted onto the outer wall of the support column 3. A gear 8 is fixedly connected to the upper surface of the sleeve, and a gear 9 is fixedly connected to the lower surface of the clamp 6. The tooth ends of gear 8 are meshed with the tooth ends of gear 9. An optical detection mechanism 10 is provided on the upper surface of the base 1, and a sample dispensing gun 15 is fixedly connected to the lower surface of the top plate 2.

[0024] Specifically, this embodiment of the invention provides an optical detection device for a medical biochemical analyzer, which mainly consists of a base 1 and a top plate 2. A support column 3 is rotatably connected to the upper surface of the base 1 via bearings. A drive motor is fixedly installed on the base 1 to drive the support column 3 to rotate. The top of the support column 3 is fixedly connected to a rotating worktable 4. The top plate 2 is arranged parallel above the base 1, and its lower surface integrates various working instruments to meet the needs of multiple procedures in the detection process. Multiple sets of clamps 6 are evenly installed inside the rotating worktable 4 via rotating connectors. The clamps 6 are circumferentially distributed, and each set of clamps 6 can stably clamp and fix a colorimetric cup 7. A sleeve is fixedly installed on the upper surface of the base 1, and the sleeve is coaxially fitted onto the outer wall of the support column 3. A gear 8 is fixedly connected to the upper surface of the sleeve, and the gear 8 is coaxially arranged with the sleeve. A gear 9 is fixedly connected to the lower surface of the clamp 6, and the gear 9 is coaxial with the clamp 6, with the tooth ends of the gear 8 meshing with the tooth ends of the gear 9. An optical detection mechanism 10 is installed on the upper surface of the base 1 corresponding to the detection position of the cuvette 7, and a sample dispensing gun 15 is fixedly connected to the lower surface of the top plate 2 corresponding to the sample dispensing station. During operation, the drive motor rotates the support column 3, which in turn rotates the rotating worktable 4. Multiple sets of clamps 6 on the rotating worktable 4 rotate together, thereby moving the cuvette 7 sequentially to different working areas, enabling continuous multi-station operation. Initially, the sample dispensing gun 15 precisely adds the test reagent and sample into the cuvette 7. The cuvette 7 then moves to the stirring station, where the stirring mechanism 5 thoroughly mixes the mixture. During the rotation of the rotating worktable 4, the gear 9 below the clamp 6 revolves around the fixed axis of the gear 8. Since the gear 8 is stationary, the gear 9 rotates on its own axis while revolving, causing the clamp 6 and the cuvette 7 to rotate synchronously. This rotational motion assists the stirring mechanism 5 in pre-mixing the reagent and sample and subsequent deep mixing, effectively avoiding uneven local reagent concentrations and improving the accuracy of the test results.

[0025] Please see the appendix Figure 2 -Appendix Figure 4 The stirring mechanism 5 includes an electric push rod 501, the upper surface of which is fixedly connected to the lower surface of the top plate 2, the output end of which is fixedly connected to a motor 502, and the output end of which is fixedly connected to a stirring rod 503.

[0026] Specifically, the upper surface of the electric actuator 501 is fixedly connected to the lower surface of the top plate 2 by bolts. The electric actuator 501 can flexibly adjust its lifting stroke according to the height of the cuvette 7. The output end of the electric actuator 501 is fixedly connected to the housing of the motor 502. The output end of the motor 502 is fixedly connected to the stirring rod 503 through a coupling. The stirring rod 503 is made of a corrosion-resistant material that does not easily react with reagents. Its end is equipped with detachable stirring blades. The stirring blades are spiral-shaped, which can increase the contact area with the reagents and improve the mixing efficiency. When the stirring mechanism 5 is working, the electric push rod 501 first drives the motor 502 and the stirring rod 503 to descend synchronously, so that the stirring rod 503 penetrates into the cuvette 7 to a suitable depth, ensuring that the stirring blades can fully contact the reagents without touching the bottom of the cuvette 7 to avoid damaging the cuvette. Then, the motor 502 is started, and the motor 502 drives the stirring rod 503 and the stirring blades to rotate at high speed, so as to fully mix the reagents and samples. After the mixing is completed, the motor 502 stops working, and the electric push rod 501 drives the motor 502 and the stirring rod 503 to rise and reset, waiting for the next stirring operation.

[0027] Please see the appendix Figure 5 The optical inspection mechanism 10 includes a light source 1001 and a detector 1002, and the lower surfaces of the light source 1001 and the detector 1002 are fixedly connected to the upper surface of the base 1.

[0028] Specifically, the lower surfaces of both the light source 1001 and the detector 1002 are fixedly connected to the upper surface of the base 1 via brackets. The light source 1001 and detector 1002 are respectively positioned on opposite sides of the cuvette 7, ensuring that the light emitted by the light source 1001 passes perpendicularly through the reagent sample within the cuvette 7, forming a stable detection optical path. The light source 1001 can be a halogen lamp or an LED light source, featuring stable luminous intensity and adjustable wavelength. The emission wavelength of the light source 1001 can be adjusted according to different detection requirements to ensure the specificity and accuracy of the detection. The detector 1002 employs a high-sensitivity photodetector, possessing advantages such as rapid response and high detection accuracy. It can quickly convert the received light signal into an electrical signal and transmit it to the subsequent data processing module. Once the cuvette 7 has rotated to the optical detection station and stabilized, the light source 1001 is activated and emits light of a specific wavelength. When the light passes through the reagent sample in the cuvette 7, some of the light is absorbed by the target substance in the sample, and the remaining transmitted light is received by the detector 1002. The detector 1002 converts the received light signal into an electrical signal, and then calculates the absorbance of the sample through the data processing module. Based on the correspondence between absorbance and substance concentration, the detection parameters such as the concentration of the target substance in the sample are obtained, thus completing the detection operation.

[0029] Please see the appendix Figure 2A sliding rod 11 is slidably connected through and inside the rotating worktable 4. A magnetic block 13 is fixedly connected to the bottom end of the sliding rod 11. A cleaning scraper 12 is fixedly connected to the outer wall of the sliding rod 11. The cleaning scraper 12 is attached to the outer wall of the colorimetric cup 7. A magnetic block 14 is fixedly connected to the upper surface of the base 1. Magnetic blocks 13 and 14 repel each other magnetically.

[0030] Specifically, to prevent dirt adhering to the outer wall of the cuvette 7 from interfering with the optical detection results, this device is equipped with a cuvette cleaning assembly, mainly composed of a slide rod 11, a first magnetic block 13, a cleaning scraper 12, and a second magnetic block 14. The slide rod 11 passes through the rotating worktable 4 and is slidably connected to a sliding sleeve inside the rotating worktable 4. The bottom end of the slide rod 11 is fixedly connected to the first magnetic block 13. The cleaning scraper 12 is fixedly connected to the outer wall of the slide rod 11. The shape of the cleaning scraper 12 is adapted to the outer wall of the cuvette 7 to ensure that the cleaning scraper 12 can fit tightly against the outer wall of the cuvette 7 while avoiding scratching the cuvette 7. The second magnetic block 14 is fixedly connected to the upper surface of the base 1 by a bracket, and the opposing surfaces of the second magnetic block 14 and the first magnetic block 13 are magnetically repelled. When the rotating worktable 4 drives the slide rod 11 and the first magnetic block 13 to rotate to a position close to the second magnetic block 14, the magnetic repulsion between the second magnetic block 14 and the first magnetic block 13 pushes the slide rod 11 to slide upward along the sliding sleeve. The slide rod 11 drives the cleaning scraper 12 to rise synchronously, so that the cleaning scraper 12 is in close contact with the outer wall of the colorimetric cup 7. At this time, the colorimetric cup 7 continues to rotate under the action of the first gear 8 and the second gear 9. The cleaning scraper 12 slides relative to the outer wall of the rotating colorimetric cup 7, removing the test residue adhering to the outer wall of the colorimetric cup 7. The cleaning scraper thoroughly removes residues, dust, and other contaminants. As the rotating table 4 continues to rotate, it moves the slide rod 11 and magnetic block 13 away from magnetic block 14. The magnetic repulsion gradually weakens until it disappears. The slide rod 11 and magnetic block 13 then slide downwards along the sliding sleeve under their own weight, causing the cleaning scraper 12 to detach from the outer wall of the cuvette 7. This prevents the cleaning scraper 12 from obstructing the detection light path, ensuring the optical detection mechanism 10 can work normally, and also preventing the cuvette from being worn due to prolonged contact between the cleaning scraper 12 and the cuvette 7. A commercial standard spring ball retainer is provided on the outer wall of the slide rod 11. A matching inverted trapezoidal slot is provided on the back of the cleaning scraper 12. The spring ball in the retainer protrudes from the surface of the retainer in its natural state. When the scraper is engaged, the ball is compressed and contracts. After the scraper is fully engaged, the ball returns to its original position and is embedded in the positioning slot of the slot, thus securing the scraper firmly. A push-button unlocking button is provided on the side of the retainer. Pressing the unlocking button compresses the ball, allowing the scraper to be quickly removed and replaced.

[0031] Please see the appendix Figure 5 -Appendix Figure 7 An electric push rod 16 is fixedly connected to the lower surface of the top plate 2. A connecting rod 17 is fixedly connected to the output end of the electric push rod 16. A motor 18 is fixedly connected to the bottom end of the connecting rod 17. A hollow cylinder 19 is fixedly connected to the output end of the motor 18. A cleaning brush 20 is fixedly connected to the outer wall of the hollow cylinder 19.

[0032] Specifically, the upper surface of the electric actuator 16 is fixedly connected to the lower surface of the top plate 2. The output end of the electric actuator 16 is fixedly connected to the connecting rod 17. The bottom end of the connecting rod 17 is fixedly connected to the motor 18, and the output end of the motor 18 is fixedly connected to the hollow cylinder 19. The hollow cylinder 19 is made of corrosion-resistant plastic and is hollow inside, which can be used to deliver cleaning fluid. Cleaning brushes 20 are evenly fixedly connected to the outer wall of the hollow cylinder 19. Once the colorimetric cup 7 has rotated to the internal cleaning position, the electric push rod 16 starts and drives the connecting rod 17, motor 18, hollow cylinder 19, and cleaning brush 20 to descend synchronously, allowing the hollow cylinder 19 and cleaning brush 20 to penetrate deep into the colorimetric cup 7 until the cleaning brush 20 makes full contact with the inner wall of the colorimetric cup 7. Then, the motor 18 starts, driving the hollow cylinder 19 and cleaning brush 20 to rotate back and forth. At the same time, the electric push rod 16 can drive the cleaning brush 20 to move slowly up and down, achieving all-round, no-dead-angle cleaning of the inner wall of the colorimetric cup 7. After cleaning is completed, the motor 18 stops working, and the electric push rod 16 drives the connecting rod 17, motor 18, hollow cylinder 19, and cleaning brush 20 to rise and reset, waiting for the next cleaning operation.

[0033] Please see the appendix Figure 5 A movable base 21 is fixedly connected to the lower surface of the top plate 2, and a pipette 22 is fixedly connected to the slider part of the movable base 21.

[0034] Specifically, after the cuvette 7 is cleaned, the cleaning waste liquid inside needs to be promptly removed. This device is equipped with a waste liquid suction structure, mainly composed of a movable base 21 and a pipette 22. The movable base 21 is fixedly connected to the lower surface of the top plate 2. The movable base 21 adopts an XYZ three-axis moving platform, driven by a servo motor, which features smooth movement and precise positioning. It can drive the pipette 22 to move up and down and horizontally, accurately aligning it with the cuvette 7 at different positions. The slider part of the movable base 21 is fixedly connected to the pipette 22. The pipette 22 is an adjustable pipette with different pipetting ranges, which can flexibly adjust the suction volume according to the volume of the cuvette 7. Furthermore, the suction end of the pipette 22 can be equipped with a disposable suction tip, effectively avoiding cross-contamination. After the cuvette 7 is cleaned, the moving base 21 moves the pipette 22 horizontally above the cuvette 7, and then lowers the pipette 22 so that the pipette tip is inserted into the cuvette 7 until it is close to the bottom. The pipette 22 starts and aspirates the cleaning waste liquid from the cuvette 7. After the aspiration is completed, the moving base 21 moves the pipette 22 upward and then moves it horizontally above the waste liquid tank. The pipette 22 stops aspiration and discharges the waste liquid into the waste liquid tank. After the waste liquid is discharged, the pipette 22 is replaced with a new disposable pipette tip, and the moving base 21 moves the pipette 22 back to its original position, ready for the next waste liquid aspiration operation.

[0035] Please see the appendix Figure 2-Appendix Figure 4 The outer wall of the electric push rod 501 is fixedly connected to a slide rail 24, the outer wall of the slide rail 24 is slidably connected to a protective shell 23, the inner wall of the protective shell 23 is rotatably connected to a connecting rod 25, and the other end of the connecting rod 25 is rotatably connected to the outer wall of the motor 502; the outer wall of the protective shell 23 is fixedly connected to a water inlet pipe 26 and a drain pipe 27, the water inlet pipe 26 is fixedly connected to a cleaning and disinfection liquid tank 29, the outer wall of the drain pipe 27 is fixedly connected to a wastewater tank 28, and the upper surfaces of the wastewater tank 28 and the cleaning and disinfection liquid tank 29 are both fixedly connected to the lower surface of the top plate 2.

[0036] Specifically, to prevent cross-contamination when the stirring rod 503 is switched between different colorimetric cups 7 and to ensure the accuracy of the test results, this device is equipped with a slide rail 24 fixedly connected to the outer wall of the electric push rod 501. The slide rail 24 guides and limits the sliding of the protective shell 23, which in turn protects the stirring rod 503. The protective shell 23 is slidably connected to the outer wall of the slide rail 24 and is equipped with a sealing gasket to ensure that the cleaning and disinfecting solution does not leak during cleaning. There are two symmetrically arranged protective shells 23, which can be opened and closed to enclose the stirring rod 503. One end of the connecting rod 25 is hinged to the inner wall of the protective shell 23, and the other end is hinged to the outer wall of the motor 502, ensuring that the motor 502 can smoothly drive the protective shell 23 to open and close when it rises and falls. The inlet pipe 26 and the outlet pipe 27 are fixedly connected to the outer wall of the protective shell 23. The other end of the inlet pipe 26 is fixedly connected to the cleaning and disinfection solution tank 29, and the other end of the outlet pipe 27 is fixedly connected to the wastewater tank 28. Both the inlet pipe 26 and the outlet pipe 27 are made of corrosion-resistant flexible hoses, which can easily extend and retract with the sliding of the protective shell 23. The upper surfaces of the cleaning and disinfection solution tank 29 and the wastewater tank 28 are fixedly connected to the lower surface of the top plate 2. Both tanks adopt a sealed structure. The cleaning and disinfection solution tank 29 stores a special cleaning and disinfection solution for cleaning the stirring rod 503. The wastewater tank 28 is used to collect the waste cleaning solution after cleaning the stirring rod 503. Both tanks are equipped with liquid level observation windows, which can facilitate the staff to check the liquid level in real time and replenish the cleaning and disinfection solution or clean up the waste cleaning solution in a timely manner. When the electric push rod 501 drives the motor 502 and stirring rod 503 to descend in preparation for stirring, the motor 502 pushes the two protective shells 23 to slide open along the slide rail 24 via the connecting rod 25, allowing the stirring rod 503 to smoothly extend into the cuvette 7 for stirring. When stirring is complete, as the electric push rod 501 drives the motor 502 and stirring rod 503 to rise and reset, the motor 502 pulls the two protective shells 23 along the slide rail 24 to slide and merge, completely enclosing the stirring rod 503 inside the protective shells 23. Subsequently, the cleaning and disinfecting solution in the cleaning and disinfecting solution tank 29 is delivered to the inside of the protective shells 23 through the water inlet pipe 26 and the delivery pump to thoroughly rinse the stirring rod 503, washing away any residual reagents on its surface. The waste cleaning solution generated during rinsing is delivered to the wastewater tank 28 for collection through the drain pipe 27 and the drain pump. After cleaning, the protective shells 23 remain closed, providing dust and pollution protection for the stirring rod 503 until the next stirring operation.

[0037] Please see the appendix Figure 6 -Appendix Figure 8A cylinder 30 is fixedly connected to the lower surface of the top plate 2. A piston plate 31 is slidably connected inside the cylinder 30. The piston plate 31 is fixedly connected to the outer wall of the connecting rod 17. An inlet pipe 32 and a drain hose 33 are fixedly connected to the outer wall of the cylinder 30. The inlet pipe 32 is fixedly connected to the cleaning and disinfection liquid tank 29. A hollow cylinder 19 is fixedly connected to the outer wall of the drain hose 33. A nozzle 34 is fixedly connected to the outer wall of the hollow cylinder 19. A one-way valve is installed inside both the inlet pipe 32 and the drain hose 33.

[0038] Specifically, the cylinder 30 is fixedly connected to the lower surface of the top plate 2. The inner wall of the cylinder 30 is smoothed to ensure that the piston plate 31 can slide smoothly inside it. The interior of the cylinder 30 is a sealed structure for storing cleaning and disinfecting solution. The piston plate 31 is slidably connected inside the cylinder 30, and a sealing ring is provided on the outer wall of the piston plate 31 to ensure the seal between the piston plate 31 and the inner wall of the cylinder 30, preventing leakage of the cleaning and disinfecting solution. The piston plate 31 is fixedly connected to the outer wall of the connecting rod 17 and rises and falls synchronously with the connecting rod 17. The connecting rod 17 passes through the bottom of the cylinder 30, and a sealing element is provided between the two to further enhance the sealing performance of the cylinder 30. The inlet pipe 32 and the outlet hose 33 are fixedly connected to the outer wall of the cylinder 30. The other end of the inlet pipe 32 is fixedly connected to the cleaning and disinfection solution tank 29 for replenishing the cleaning and disinfection solution into the cylinder 30. The other end of the outlet hose 33 is fixedly connected to the hollow cylinder 19 for transporting the cleaning and disinfection solution from the cylinder 30 to the interior of the hollow cylinder 19. The outlet hose 33 is made of a corrosion-resistant and flexible hose. The nozzles 34 are evenly fixedly connected to the outer wall of the hollow cylinder 19. The spray direction of the nozzles 34 is towards the inner wall of the cleaning brush 20 and the colorimetric cup 7 to ensure that the cleaning and disinfection solution can be evenly sprayed on the inner wall of the cleaning brush 20 and the colorimetric cup 7, thereby enhancing the cleaning effect. Both the inlet pipe 32 and the outlet pipe 33 are equipped with one-way valves. The one-way valve on the inlet pipe 32 only allows the cleaning and disinfecting solution to flow from the cleaning and disinfecting solution tank 29 into the cylinder 30, preventing the cleaning and disinfecting solution in the cylinder 30 from flowing back into the cleaning and disinfecting solution tank 29. The one-way valve on the outlet pipe 33 only allows the cleaning and disinfecting solution to flow from the cylinder 30 into the hollow cylinder 19, preventing the cleaning solution or waste liquid in the hollow cylinder 19 from flowing back into the cylinder 30. When the electric push rod 16 drives the connecting rod 17 to descend, the connecting rod 17 drives the piston plate 31 to slide downward along the inner wall of the cylinder 30. The space inside the cylinder 30 shrinks, and the pressure increases. Under the pressure, the cleaning and disinfecting solution inside pushes open the one-way valve on the drain hose 33 and is delivered to the hollow cylinder 19 through the drain hose 33. Then, it is sprayed out from the nozzles 34 on the outer wall of the hollow cylinder 19 and sprayed onto the cleaning brush 20 and the inner wall of the colorimetric cup 7. With the reciprocating rotation of the cleaning brush 20, efficient cleaning of the inner wall of the colorimetric cup 7 is achieved. When the electric push rod 16 drives the connecting rod 17 to rise, the connecting rod 17 drives the piston plate 31 to slide upward along the inner wall of the cylinder 30. The space inside the cylinder 30 increases, forming a negative pressure. Under the action of the negative pressure, the cleaning and disinfecting solution in the cleaning and disinfecting solution tank 29 pushes open the one-way valve on the inlet pipe 32 and is drawn into the cylinder 30 through the inlet pipe 32, replenishing the cleaning and disinfecting solution in the cylinder 30.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An optical detection device for a medical biochemical analyzer, characterized in that, The device includes a base (1) and a top plate (2). A support column (3) is rotatably connected to the upper surface of the base (1). A rotating worktable (4) is fixedly connected to the upper surface of the support column (3). A stirring mechanism (5) is provided on the lower surface of the top plate (2). A clamp (6) is rotatably connected inside the rotating worktable (4). A colorimetric cup (7) is clamped and fixed inside the clamp (6). A sleeve is fixedly connected to the upper surface of the base (1). The sleeve is fitted onto the outer wall of the support column (3). A gear one (8) is fixedly connected to the upper surface of the sleeve. A gear two (9) is fixedly connected to the lower surface of the clamp (6). The tooth end of the gear one (8) meshes with the tooth end of the gear two (9). An optical detection mechanism (10) is provided on the upper surface of the base (1). A sample dispensing gun (15) is fixedly connected to the lower surface of the top plate (2). A colorimetric cup cleaning assembly is provided on the rotating worktable (4).

2. The optical detection device of a medical biochemical analyzer according to claim 1, characterized in that, The stirring mechanism (5) includes an electric push rod (501), the upper surface of which is fixedly connected to the lower surface of the top plate (2), the output end of which is fixedly connected to a motor (502), and the output end of which is fixedly connected to a stirring rod (503).

3. The optical detection device of a medical biochemical analyzer according to claim 1, characterized in that, The optical detection mechanism (10) includes a light source (1001) and a detector (1002), and the lower surfaces of the light source (1001) and the detector (1002) are fixedly connected to the upper surface of the base (1).

4. The optical detection device of a medical biochemical analyzer according to claim 1, characterized in that, The cuvette cleaning assembly includes a slide bar (11) and a cleaning scraper (12). The rotating worktable (4) passes through and is slidably connected to the slide bar (11). A magnetic block (13) is fixedly connected to the bottom end of the slide bar (11). The cleaning scraper (12) is fixedly connected to the outer wall of the slide bar (11). The cleaning scraper (12) fits against the outer wall of the cuvette (7). A magnetic block (14) is fixedly connected to the upper surface of the base (1). The magnetic blocks (13) and (14) repel each other magnetically.

5. The optical detection device of a medical biochemical analyzer according to claim 1, characterized in that, The lower surface of the top plate (2) is fixedly connected to an electric push rod two (16), the output end of the electric push rod two (16) is fixedly connected to a connecting rod (17), the bottom end of the connecting rod (17) is fixedly connected to a motor two (18), the output end of the motor two (18) is fixedly connected to a hollow cylinder (19), and the outer wall of the hollow cylinder (19) is fixedly connected to a cleaning brush (20).

6. The optical detection device of a medical biochemical analyzer according to claim 1, characterized in that, A movable seat (21) is fixedly connected to the lower surface of the top plate (2), and a pipette (22) is fixedly connected to the slider part of the movable seat (21).

7. The optical detection device of a medical biochemical analyzer according to claim 2, characterized in that, The outer wall of the electric push rod (501) is fixedly connected to a slide rail (24), the outer wall of the slide rail (24) is slidably connected to a protective shell (23), the inside of the protective shell (23) is rotatably connected to a connecting rod (25), and the other end of the connecting rod (25) is rotatably connected to the outer wall of the motor (502).

8. The optical detection device of a medical biochemical analyzer according to claim 7, characterized in that, The outer wall of the protective shell (23) is fixedly connected to a water inlet pipe (26) and a drain pipe (27). The water inlet pipe (26) is fixedly connected to a cleaning and disinfection liquid tank (29). The outer wall of the drain pipe (27) is fixedly connected to a wastewater tank (28). The upper surfaces of the wastewater tank (28) and the cleaning and disinfection liquid tank (29) are both fixedly connected to the lower surface of the top plate (2).

9. The optical detection device of a medical biochemical analyzer according to claim 5, characterized in that, A cylinder (30) is fixedly connected to the lower surface of the top plate (2). A piston plate (31) is slidably connected inside the cylinder (30). The piston plate (31) is fixedly connected to the outer wall of the connecting rod (17). An inlet pipe (32) and a drain hose (33) are fixedly connected to the outer wall of the cylinder (30). The inlet pipe (32) is fixedly connected to the cleaning and disinfection tank (29). The outer wall of the drain hose (33) is fixedly connected to the hollow cylinder (19). A nozzle (34) is fixedly connected to the outer wall of the hollow cylinder (19).

10. The optical detection device of a medical biochemical analyzer according to claim 9, characterized in that, Both the inlet pipe (32) and the outlet pipe (33) are equipped with one-way valves.

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