Plate coating device based on culture dish for laboratory
The automated petri dish spreader, which uses a DC motor to drive the rotating disk and scraper mechanism, solves the problem of uneven operation of hand-held scrapers, achieves uniform coating of liquid samples, and improves experimental efficiency and result reliability.
Patent Information
- Application Number
- CN202520083715.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-14
AI Technical Summary
Existing petri dish spreaders require hand-held scraping, resulting in uneven coating, affecting the accuracy and reproducibility of experimental results, and are also inefficient and labor-intensive.
An automated petri dish spreader was designed, comprising a DC motor-driven rotating disk and a scraper mechanism, which can automatically and evenly spread liquid samples and is equipped with a clamping device to fix the petri dishes, adapting to petri dishes of different sizes.
This method achieves uniform distribution of liquid samples on the surface of the petri dish, improves experimental efficiency, reduces the labor intensity of operators, enhances the flexibility and adaptability of the equipment, and ensures the reliability of experimental results.
Smart Images
Figure CN223766341U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laboratory instruments, and in particular to a plate spreader for laboratory petri dishes. Background Technology
[0002] A petri dish spreader is a commonly used tool in the laboratory, primarily used in microbiology, cell biology, and other life science fields, to uniformly spread liquid samples onto the surface of solid culture media for culturing, screening, and analysis.
[0003] Based on the structure of a laboratory petri dish spreader, which includes a DC motor, a rotating disk, a petri dish, and a scraper, the petri dish spreader is a very important experimental tool used in microbiology experiments. It helps researchers to evenly spread samples on culture media through mechanical means, providing the necessary experimental conditions for the isolation, cultivation, and observation of microorganisms.
[0004] In existing technologies, some plate spreaders require hand-held scrapers for coating. Hand-held scraper coating requires a high level of skill, and differences in operator experience often lead to uneven coating, affecting the accuracy of experimental results. Because factors such as the contact pressure and angle of the scraper are difficult to control, localized over-coating and under-coating are prone to occur. This uneven coating affects the uniformity of microbial growth, leading to deviations in experimental results, impacting the repeatability and reliability of the data. Furthermore, hand-held scraper coating is relatively slow, labor-intensive, and inefficient. Prolonged operation can easily lead to operator fatigue, further increasing workload and the probability of errors. Therefore, this paper proposes a laboratory-grade petri dish plate spreader to address these problems. Utility Model Content
[0005] The present invention proposes a laboratory petri dish spreader, which aims to improve the problem that some existing devices do not have a mechanism for automatically spreading liquid in the petri dish.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] Based on a laboratory petri dish spreader, it includes a base plate, an operating table fixedly connected to the top of the base plate, a spreading mechanism fixedly connected inside the operating table, a rotating disk rotatably connected to the top of the operating table, and a reinforcing mechanism fixedly connected to the top of the rotating disk.
[0008] The coating mechanism includes a battery box, the bottom of which is fixedly connected to the bottom of the operating table. A connecting wire is fixedly connected inside the battery box, and a drive assembly is fixedly connected to the outside of the connecting wire. A switch assembly is fixedly connected to the top of the battery box. A connecting rod is fixedly connected to the top of the operating table. A sliding column is slidably connected to the outside of the connecting rod. A telescopic rod is fixedly connected to the bottom of the sliding column. A scraper is fixedly connected to the bottom of the telescopic rod. The petri dish body is slidably connected to the bottom of the scraper.
[0009] As a further description of the above technical solution:
[0010] The drive assembly includes a DC motor and an output shaft. The DC motor is externally fixedly connected to the inside of the operating table, and the bottom of the output shaft is fixedly connected to the top of the DC motor.
[0011] As a further description of the above technical solution:
[0012] The switch assembly includes a second connecting wire and a button. The bottom of the second connecting wire is fixedly connected to the top of the control panel, and the top of the second connecting wire is fixedly connected to the bottom of the button.
[0013] As a further description of the above technical solution:
[0014] The reinforcement mechanism includes a rotating plate, the bottom of which is fixedly connected to the top of the rotating disk. Multiple connecting columns are slidably connected inside the rotating plate, and clamping blocks are fixedly connected to the top of the connecting columns. A pull rod is fixedly connected inside the rotating plate, and a limit plate is fixedly connected to the top of the rotating plate. A ring is rotatably connected to the outside of the rotating disk.
[0015] As a further description of the above technical solution:
[0016] The bottom of the culture dish body is rotatably connected to the top of the limiting plate, and the outside of the output shaft is rotatably connected to the inside of the rotating disk.
[0017] As a further description of the above technical solution:
[0018] The DC motor is externally fixedly connected to the inside of the operating table, and the output shaft is externally rotatably connected to the inside of the operating table.
[0019] As a further description of the above technical solution:
[0020] The bottom of the ring is fixedly connected to the top of the operating table, and the outside of the clamping block is slidably connected to the inside of the limiting plate.
[0021] As a further description of the above technical solution:
[0022] The bottom of the button is fixedly connected to the top of the control panel, and the outside of the second connecting line is fixedly connected to the inside of the control panel.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, the battery in the battery box transmits signals and power to the DC motor through the connecting wire. The output shaft outputs power to drive the rotating disk and the petri dish above to rotate. The sliding column on the connecting rod fixed on the top of the operating table is connected to the telescopic rod at the bottom, and the scraper at the bottom is connected to the scraper to coat the petri dish. There is no need to hold the scraper by hand, and the coating liquid is evenly distributed on the surface of the petri dish. The automated petri dish coating device can usually complete the coating process faster than manual operation, saving experimental time and improving laboratory work efficiency.
[0025] 2. In this utility model, the rotating pull rod, the connecting column and the clamping block at the top slide in the arc-shaped groove inside the rotating plate. The three clamping blocks slide inward at the same time to fix the culture dish, which can prevent the culture dish from shifting or tilting during operation. It can fix culture dishes of different sizes, enhancing the flexibility and adaptability of the equipment. Attached Figure Description
[0026] Figure 1 This is a perspective view of the laboratory petri dish spreader proposed in this utility model;
[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0028] Figure 3 This is a schematic diagram of the operating table based on the laboratory petri dish spreader proposed in this utility model.
[0029] Figure 4 for Figure 3 Enlarged view of point B in the middle.
[0030] Legend:
[0031] 1. Base plate; 2. Operating table; 3. Battery box; 4. Connecting cable one; 5. DC motor; 6. Output shaft; 7. Rotating disk; 8. Connecting cable two; 9. Button; 10. Connecting rod; 11. Sliding column; 12. Telescopic rod; 13. Scraper; 14. Petri dish body; 15. Rotating plate; 16. Connecting column; 17. Clamping block; 18. Pull rod; 19. Limiting plate; 20. Ring. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Reference Figure 2 , Figure 3 , Figure 4 An embodiment of this utility model is provided: a laboratory petri dish coater, including a base plate 1, which is the foundation of the entire device. All components are installed on this component to support the overall structural stability. An operating table 2 is fixedly connected to the top of the base plate 1. The operating table 2 is the working platform of the coater. A coating mechanism is fixedly connected inside the operating table 2 to be responsible for the actual coating operation. A rotating disk 7 is rotatably connected to the top of the operating table 2. A reinforcing mechanism is fixedly connected to the top of the rotating disk 7.
[0034] The coating mechanism includes a battery box 3, the bottom of which is fixedly connected to the bottom of the operating table 2. A connecting wire 4 is fixedly connected inside the battery box 3, which connects the battery box 3 to the DC motor 5. The battery box 3 contains a battery that provides power to support the operation of the equipment. The battery box 3 is connected to the motor through the connecting wire 4 to provide energy to the motor. A drive assembly is fixedly connected to the outside of the connecting wire 4. The drive assembly includes the DC motor 5 and an output shaft 6. The DC motor 5 is fixedly connected to the inside of the operating table 2 and is responsible for driving the rotation of the rotating disk 7. The DC motor 5 controls the current by changing the supply voltage, thereby adjusting the speed of the motor. The direction of rotation of the motor can be changed by changing the polarity of the power supply. The bottom of the output shaft 6 is fixedly connected to the top of the DC motor 5, which transmits the rotational motion of the DC motor 5 to the rotating disk 7 to achieve the purpose of rotation. A switch assembly is fixedly connected to the top of the battery box 3. The switch assembly is used to control the start-up, speed adjustment and direction adjustment of the equipment. The switch assembly includes a connecting wire 8 and a button 9. The bottom of the connecting wire 8 is fixedly connected to the top of the operating table 2.
[0035] The top of connecting cable 28 is fixedly connected to the bottom of button 9. There are three connecting cables 28 and three buttons 9. The three buttons 9 have different functions, controlling the on / off switch, speed adjustment, and direction adjustment of the equipment respectively. The three connecting cables 28 connect the three buttons 9 to the battery inside the battery box 3. The top of the operating table 2 is fixedly connected to a connecting rod 10. The connecting rod 10 provides support and sliding space for the sliding column 11. The sliding column 11 is slidably connected to the outside of the connecting rod 10. The sliding column 11 can slide inside the connecting rod 10 to adjust the left and right position of the scraper 13. The bottom of the sliding column 11 is fixedly connected to a telescopic rod 12, which can adjust the up and down angle of the scraper 13. It can be fixed in petri dishes of different sizes for coating operations. The bottom of the telescopic rod 12 is fixedly connected to the scraper 13, which has a certain degree of flexibility to ensure uniform coating without damaging the petri dish. The bottom of the scraper 13 is slidably connected to the petri dish body 14, which is a container for holding culture medium. The rotation of the components at the bottom of the petri dish body 14 allows it to rotate during the coating process, ensuring uniform coating.
[0036] Reference Figures 3 to 4 The reinforcement mechanism includes a rotating plate 15, the bottom of which is fixedly connected to the top of the rotating disk 7. Three arc-shaped sliding grooves are provided inside the rotating plate 15. Three connecting posts 16 can slide inside the rotating plate 15 and simultaneously slide towards the center. Multiple connecting posts 16 are slidably connected inside the rotating plate 15. A clamping block 17 is fixedly connected to the top of each connecting post 16. The connecting posts 16 are connected to the clamping block 17 at the top. The sliding grooves of the rotating plate 15 drive the connecting posts 16 to slide and restrict the sliding of the connecting posts 16 to only within the provided sliding grooves. A tensioning mechanism is fixedly connected inside the rotating plate 15. Rod 18 is connected inside the rotating plate 15. Pulling the rod 18 allows the connecting column 16 and the top clamping block 17 to slide towards the center within the groove of the rotating plate 15 to fix culture dishes of different sizes. A limiting plate 19 is fixedly connected to the top of the rotating plate 15. When the connecting column 16 slides within the groove of the rotating plate 15, the limiting plate 19 restricts the sliding range of the clamping block 17. A ring 20 is rotatably connected to the outside of the rotating disk 7. The ring 20 is fixed to the top of the operating table 2 to support and fix the rotating disk 7, ensuring that it will not be accidentally displaced during operation.
[0037] Reference Figure 1 , Figure 2 , Figure 4The bottom of the petri dish body 14 is rotatably connected to the top of the limiting plate 19. The external part of the output shaft 6 is rotatably connected to the inside of the rotating disk 7. The external part of the DC motor 5 is fixedly connected to the inside of the operating table 2. The external part of the output shaft 6 is rotatably connected to the inside of the operating table 2. The bottom of the ring 20 is fixedly connected to the top of the operating table 2. The external part of the clamping block 17 is slidably connected to the inside of the limiting plate 19. The bottom of the button 9 is fixedly connected to the top of the operating table 2. The external part of the connecting wire 8 is fixedly connected to the inside of the operating table 2.
[0038] Working principle: The operator starts the device by pressing one of the buttons 9 on the operating table 2 on the base plate 1. Button 9 controls the battery box 3 to supply power to the DC motor 5 via connecting wire 2 8 and connecting wire 1 4. The operator can adjust the device's switch, speed, and direction in real time via the three buttons 9. The motor starts to rotate and drives the output shaft 6, thereby rotating the rotating disk 7. The petri dish body 14 is fixed on the top of the limiting plate 19 and connected to the rotating disk 7, so that the petri dish body 14 can rotate during the coating process to ensure uniform coating. The sliding column 11 in the coating mechanism, supported by the connecting rod 10, can slide inside the connecting rod 10 to adjust the left and right angle of the scraper 13. The bottom of the sliding column 11 is connected to the telescopic rod 12, which allows the scraper 13 to be adjusted in the up and down direction to adapt to petri dishes of different sizes. The scraper 13 has a certain degree of flexibility and can coat evenly without damaging the petri dish.
[0039] Pulling the lever 18 inside the rotating plate 15 causes three grooves to open on the rotating plate 15 at the top of the rotating disk 7. The three connecting columns 16 drive the clamping block 17 at the top to slide towards the center simultaneously in the grooves, which can fix the main body 14 of the petri dish with different diameters. The limiting plate 19 installed on the top of the rotating plate 15 can limit the sliding range of the clamping block 17. After the operation is completed, the operator can turn off the equipment and complete the coating operation. The design of this device effectively improves the efficiency and uniformity of petri dish coating and is suitable for various laboratory needs.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. Laboratory plate spreader based on Petri dish, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected with an operation table (2), the inside of the operation table (2) is fixedly connected with a coating mechanism, the top of the operation table (2) is rotatably connected with a rotating disc (7), and the top of the rotating disc (7) is fixedly connected with a reinforcing mechanism. The coating mechanism comprises a battery box (3), the bottom of the battery box (3) is fixedly connected to the bottom of the inside of the operation table (2), the inside of the battery box (3) is fixedly connected with a connecting wire I (4), the outside of the connecting wire I (4) is fixedly connected with a driving assembly, the top of the battery box (3) is fixedly connected with a switch assembly, the top of the operation table (2) is fixedly connected with a connecting rod (10), the outside of the connecting rod (10) is slidably connected with a sliding column (11), the bottom of the sliding column (11) is fixedly connected with a telescopic rod (12), the bottom of the telescopic rod (12) is fixedly connected with a scraper (13), and the bottom of the scraper (13) is slidably connected with a culture dish body (14).
2. The laboratory based petri plate spreader of claim 1, wherein: The driving assembly comprises a DC motor (5) and an output shaft (6), the outside of the DC motor (5) is fixedly connected to the inside of the operation table (2), and the bottom of the output shaft (6) is fixedly connected to the top of the DC motor (5).
3. The laboratory based petri plate spreader of claim 1, wherein: The switch assembly comprises a connecting wire II (8) and a button (9), the bottom of the connecting wire II (8) is fixedly connected to the top of the operation table (2), and the top of the connecting wire II (8) is fixedly connected to the bottom of the button (9).
4. The laboratory based petri dish spreader of claim 2, wherein: The reinforcing mechanism comprises a rotating plate (15), the bottom of the rotating plate (15) is fixedly connected to the top of the rotating disc (7), the inside of the rotating plate (15) is slidably connected with a plurality of connecting columns (16), the top of the connecting column (16) is fixedly connected with a clamping block (17), the inside of the rotating plate (15) is fixedly connected with a pull rod (18), the top of the rotating plate (15) is fixedly connected with a limiting plate (19), and the outside of the rotating disc (7) is rotatably connected with a circular ring (20).
5. The laboratory based petri dish spreader of claim 4, wherein: The bottom of the culture dish body (14) is rotatably connected to the top of the limiting plate (19), and the outside of the output shaft (6) is rotatably connected to the inside of the rotating disc (7).
6. The laboratory based petri dish spreader of claim 2, wherein: The outside of the DC motor (5) is fixedly connected to the inside of the operation table (2), and the outside of the output shaft (6) is rotatably connected to the inside of the operation table (2).
7. The laboratory based petri dish spreader of claim 4, wherein: The bottom of the circular ring (20) is fixedly connected to the top of the operation table (2), and the outside of the clamping block (17) is slidably connected to the inside of the limiting plate (19).
8. The laboratory based petri dish spreader of claim 3, wherein: The bottom of the button (9) is fixedly connected to the top of the operation table (2), and the outside of the connecting wire II (8) is fixedly connected to the inside of the operation table (2).