A single-drive linkage illumination module for fluorescence microscopy

Abstract

This application relates to the field of lighting technology, and more particularly to a single-drive linkage lighting module for a fluorescence microscope. The module includes first and second perpendicular support areas, which respectively house a dichroic block assembly that rotates and a light source assembly that moves linearly. By setting a single drive element to drive a linkage transmission mechanism, which utilizes flexible transmission elements and guide wheels capable of cross-plane transmission, the output motion of the single drive element is simultaneously converted into the rotation of the dichroic block assembly and the linear motion of the light source assembly, ensuring rigid synchronization of the two through mechanical structure. The module also integrates photoelectric positioning and mechanical limiting devices to ensure high precision and high stability after switching to the correct position. This application's module has a compact structure, reliable synchronization, and effectively simplifies the drive and control system.

Description

Technical Field

[0001] This application relates to the field of lighting technology, and more particularly to a single-drive linkage lighting module for a fluorescence microscope. Background Technology

[0002] In the fields of professional lighting and optical analysis, such as fluorescence microscopy, it is often necessary to switch different wavelengths of excitation light sources according to different observation targets or experimental requirements, and simultaneously replace the matching optical filter element group, i.e., dichroic blocks, to ensure efficient utilization of excitation light and effective filtering of stray light.

[0003] Currently, devices that achieve coordinated switching between light sources and color blocks typically employ multiple independent drive systems to control the movement of the light source and color blocks separately. While this approach achieves the functionality, its structure is relatively complex, requiring each drive system to have its own motor, driver, and transmission components. This not only increases the overall size and weight of the device but also raises hardware costs and assembly complexity. More importantly, because the two drive systems are controlled independently, ensuring that the light source and its corresponding color block can be synchronized requires complex electrical control logic or software algorithms for coordination.

[0004] Based on the above, this application proposes a single-drive linkage illumination module for fluorescence microscopes, which can effectively solve the above problems. Utility Model Content

[0005] To address the problem of complex drive structures and control systems in existing composite lighting devices when switching light sources and color blocks, this application proposes a single-drive linkage lighting module for fluorescence microscopes.

[0006] A single-drive linkage illumination module for a fluorescence microscope includes: The support plate includes a first support area and a second support area, which are arranged perpendicularly to each other. A color separation block assembly is disposed in the first bearing area, and the color separation block assembly is configured to perform a rotational movement; A light source assembly is disposed in the second bearing area, and the light source assembly is configured to perform linear motion. A single drive element is disposed in the second load-bearing area; and A linkage transmission mechanism is provided, which is connected to the single drive component, the color block assembly, and the light source assembly. The linkage transmission mechanism is configured to simultaneously convert the output motion of the single drive component into the rotational motion of the color block assembly and the linear motion of the light source assembly, so as to achieve synchronous switching between the two.

[0007] This solution adopts a "single drive + linkage transmission" structure, which simplifies the overall mechanical structure and electrical control compared to solutions using multiple independent drive systems, helping to reduce the manufacturing cost, size, and weight of the equipment. Through mechanical linkage, the switching process between color blocks and corresponding light sources can be synchronized, improving the reliability of the switching.

[0008] In one embodiment, the color block assembly includes a color block turntable and multiple color blocks disposed on the turntable. The light source assembly includes a light source slider, a guide rail, a moving stage, a light source support platform, and multiple LED light sources. The moving stage is disposed on the light source slider, the light source support platform is disposed on the moving stage, and the multiple LED light sources are mounted on the light source support platform. Each color block corresponds one-to-one with a light source. The linkage transmission mechanism is configured to drive the color block turntable to rotate and simultaneously drive the light source slider to move linearly along the guide rail. This scheme clearly defines the actuators for the rotational and linear motions: the color block turntable and the light source slider. The one-to-one correspondence between the color blocks and the LED light sources helps ensure that the filter elements in the optical path system match the light source wavelength after each switch.

[0009] In one embodiment, the linkage transmission mechanism includes a driven wheel, a flexible transmission component, and a connecting component. The driven wheel is coaxially and fixedly connected to the color block turntable; the flexible transmission component is wound around the driven wheel; one end of the connecting component is fixedly connected to the light source slider, and the other end is fixedly connected to the flexible transmission component. This structure is one way to achieve synchronous linkage. When the flexible transmission component moves, its linear motion is transmitted to the light source slider through the connecting component. Simultaneously, the transmission cooperation between the flexible transmission component and the driven wheel can drive the driven wheel to rotate. This design utilizes a single flexible transmission component to transmit motion, which helps to simplify the structure, achieve reliable transmission, and establish a correspondence between rotational motion and linear motion.

[0010] In one embodiment, the linkage transmission mechanism further includes a drive wheel connected to the single drive element, a tension wheel, and a guide wheel. Both the drive wheel and the tension wheel are located within the second bearing area. The guide wheel is located at the boundary between the first and second bearing areas, and its function is to guide the movement path of the flexible transmission element, causing it to deflect between two mutually perpendicular areas. The drive wheel, tension wheel, and guide wheel together define the transmission path of the flexible transmission element. The guide wheel is used to solve the layout problem of transmitting power using a single flexible transmission element in a non-coplanar structure, allowing for a more compact overall module layout.

[0011] In one embodiment, a limiting component is also added to the module. This limiting component is configured to mechanically limit the movement of the color separation block turntable and the light source slider when they stop moving. This solution, by adding a mechanical limiting structure, locks the color separation blocks and the light source in their working positions after the drive component stops outputting torque. This helps resist displacement caused by factors such as equipment vibration, improves the stability of optical path alignment, and plays a positive role in ensuring image quality.

[0012] In one embodiment, the limiting assembly includes a first limiting arm and a second limiting arm. The first limiting arm is located on the side of the driven wheel near the second bearing area and cooperates with the driven wheel; the second limiting arm is located on the side of the tensioning wheel away from the drive wheel and cooperates with the moving platform. Multiple first limiting grooves are provided on the side wall of the driven wheel, and multiple second limiting grooves are provided on the side wall of the moving platform. During limiting, the ends of the first and second limiting arms abut against the corresponding first and second limiting grooves, respectively. This "arm + groove" limiting design is intuitive and reliable. By setting limiting points on both the rotating and linear motion components, simultaneous locking of the two moving components is achieved, which helps improve positioning accuracy and stability.

[0013] In one embodiment, a light-shielding structure is provided on the connector. Multiple positioning optocouplers are arranged between the drive wheel and the tension wheel. When the connector moves to a preset position following the flexible transmission component, the light-shielding structure blocks the light path of the corresponding positioning optocoupler, thereby generating a positioning signal. Specifically, the positioning optocoupler may have a groove, and the light-shielding structure is a light-shielding tooth, the teeth of which can be inserted into the groove to achieve light blocking. This solution uses photoelectric detection to determine the position, featuring non-contact operation and fast response. By placing the light-shielding structure on the connector that moves synchronously with the slider, it can be used to reflect the real-time position of the transmission system with high detection accuracy.

[0014] In one embodiment, the module further includes a signal receiving board and a light source driving board. The signal receiving board is electrically connected to the single drive unit and the light source driving board. It is configured to: receive external control commands to control the operation of the single drive unit; and simultaneously receive a positioning signal generated by a positioning optocoupler. Upon receiving the positioning signal, the signal receiving board controls the single drive unit to stop operating and simultaneously controls the light source driving board to illuminate the LED light source corresponding to the current preset position. This scheme constitutes a closed-loop control system. It uses the positioning signal of mechanical movement as a trigger condition to realize the linkage between drive stopping and light source illumination, improving the degree of automation. This control logic ensures that the light source is illuminated after the mechanical part has reached its positioning position, which helps to ensure the accuracy of operation.

[0015] This application provides a single-drive linkage illumination module for a fluorescence microscope, which achieves the following technical effects: By using a single drive component in conjunction with a linkage transmission mechanism, the mechanical structure and electrical control are simplified, which helps to reduce hardware costs and equipment size.

[0016] The mechanical linkage synchronizes the rotation of the color blocks with the linear motion of the light source, ensuring the coordination and consistency of their movements from a physical structure perspective, resulting in high reliability.

[0017] By setting guide wheels, the flexible transmission components can transmit power on two mutually perpendicular planes, making the overall layout of the module more compact and improving space utilization.

[0018] By setting up mechanical limit components, the moving parts can be locked after the color blocks and LED light sources are switched into place, which helps to resist external interference and ensure the stability of the optical path.

[0019] By setting up a signal receiving board, a light source driving board, and a positioning optocoupler, combined with photoelectric position detection and closed-loop control logic, the switching process is automated, ensuring the correspondence between "position" and "lighting" and improving the ease of operation of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a single-drive linkage illumination module for a fluorescence microscope proposed in this application.

[0021] Figure 2 This is a schematic diagram of a single-drive linkage illumination module for fluorescence microscopy without a housing, as proposed in this application.

[0022] Figure 3 This is a schematic diagram of the light source slider in a single-drive linkage illumination module for a fluorescence microscope proposed in this application.

[0023] Figure 4 This is a schematic diagram of the moving stage in a single-drive linkage illumination module for a fluorescence microscope proposed in this application.

[0024] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0025] Figure 6 This is a schematic diagram of the light source support stage in a single-drive linkage illumination module for a fluorescence microscope proposed in this application.

[0026] Figure 7 This is a schematic diagram of the signal receiving board in a single-drive linkage illumination module for a fluorescence microscope proposed in this application.

[0027] Figure 8This is an optical path diagram of a single-drive linkage illumination module for a fluorescence microscope proposed in this application in practical application.

[0028] Explanation of reference numerals in the attached figures: 11. Support plate; 12. First support area; 13. Second support area; 2. Color block assembly; 21. Color block turntable; 22. Color block; 3. Light source assembly; 31. Light source slider; 32. Guide rail; 33. Moving stage; 331. Second limiting groove; 34. Light source support platform; 35. LED light source; 36. Copper heat sink; 4. Single drive component; 5. Linkage transmission mechanism; 51. Driven wheel; 511. First limiting groove; 52. Flexible transmission Components; 53. Connector; 531. Light-shielding tooth; 54. Drive wheel; 55. Tensioning wheel; 56. Guide wheel; 6. Limiting assembly; 61. First limiting arm; 62. Second limiting arm; 63. Tension spring; 7. Positioning optocoupler; 71. Groove; 8. Signal receiving board; 81. Flexible flat cable and drag chain cable; 9. Light source driving board; 10. Microscope interface board; 100. Housing; 101. Left side appearance component; 102. Right side appearance component; 103. Rear cover. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-8 This application provides a more detailed description of a single-drive linkage illumination module for a fluorescence microscope.

[0030] This application discloses a single-drive linkage illumination module for a fluorescence microscope, including a carrier plate 1, a color block assembly 2, a light source assembly 3, a single drive component 4, and a linkage transmission mechanism 5.

[0031] In this embodiment, the support plate 1 includes a first support area 11 and a second support area 12, which are arranged perpendicularly to each other on the plane of the support plate 1. A color separation block assembly 2 is installed on the first support area 11. The core of the color separation block assembly 2 is a rotatable color separation block turntable 21. A through hole is opened in the middle of the color separation block turntable 21, and a focusing lens and a collimating lens are arranged sequentially inside the through hole along the direction of the light emitted by the light source. Based on the central through hole, multiple mounting positions are evenly arranged around the circumference of the color separation block turntable 21. Each mounting position is used to install an independent color separation block 22. Each color separation block 22 contains an excitation plate, a color separation plate, and a cutoff plate arranged sequentially along the direction of the light emitted by the light source. Each color separation block 22 corresponds to a specific observation band. In this embodiment, three color separation blocks 22 are preferred.

[0032] The second support area 12 is equipped with a light source assembly 3, a single drive unit 4, and a linkage transmission mechanism 5. The light source assembly 3 includes a fixed linear guide rail 32 and a light source slider 31 that can slide on the guide rail 32. A moving stage 33 is fixed on the light source slider 31, and a light source support platform 34 is fixed on the moving stage 33. Three LED light sources 35 are mounted side by side on the light source support platform 34. The wavelengths of these three LED light sources 35 are respectively matched with the three color separation blocks 22 mentioned above.

[0033] Specifically, in this embodiment, the optical path principle of the LED light source 35 and the dichroic block is as follows: In the light source assembly 3 located in the second carrying area 12, the selected LED light source 35 emits light of a specific wavelength towards the first carrying area 11. This light enters the through hole of the dichroic block turntable 21 and is collimated to form a horizontal beam. This beam then enters the corresponding dichroic block 22, which has been synchronously switched into the optical path. First, it passes through the excitation filter for spectral purification, and then is reflected by the dichroic mirror placed at a 45-degree angle. The optical path is thus deflected by 90 degrees and becomes vertically upward, entering the objective lens and focusing on the sample. After the sample is excited, it emits fluorescence with a longer wavelength. This fluorescence returns along the original path, penetrates the dichroic mirror, and is filtered by the emission filter to remove residual excitation light and stray light. Finally, the pure fluorescence signal is transmitted to the eyepiece or imaging CCD to complete the observation.

[0034] In this embodiment, to ensure the light intensity stability and lifespan of the high-power LED light source 35 during long-term operation, a heat dissipation structure is integrated on the light source support platform 34. Specifically, this structure is a copper heat sink 36 with a high thermal conductivity, which is tightly fitted to the LED light source 35. The copper heat sink 36 is equipped with dense heat dissipation fins, increasing the contact area with air and rapidly dissipating the heat generated by the LED light source 35 through natural convection or forced air cooling.

[0035] In this embodiment, the single drive unit 4 is preferably a stepper motor, which is disposed in the second bearing area 12.

[0036] In this embodiment, the linkage transmission mechanism 5 includes a driven wheel 51, a flexible transmission component 52, a connecting component 53, a drive wheel 54, a tensioning wheel 55, and multiple guide wheels 56. The drive wheel 54 is preferably a synchronous belt pulley, coaxially and firmly fixed to the output shaft of the stepper motor, serving as the power source for the entire system. The driven wheel 51 is also a synchronous belt pulley, coaxially fixed to the central shaft of the color-block turntable 21. The rotation of the driven wheel 51 is directly equivalent to the rotation of the color-block turntable 21. The tensioning wheel 55 is installed in the second bearing area 12 to apply preload to the transmission system, eliminate transmission gaps, ensure the synchronous belt is always taut, and ensure the smoothness and accuracy of the transmission. In this embodiment, the flexible transmission component 52 is a closed-loop synchronous belt, with teeth on the inner side that match the drive wheel 54 and the driven wheel 51. The shape enables precise transmission without slippage; one end of the connecting member 53 is fixed to the side of the moving platform 33, while the other end is fixed to the outer surface of the flexible transmission member 52, so as to realize the synchronous movement of the moving platform 33 and the flexible transmission member 52; the guide wheel 56 is the pivot component for realizing cross-plane transmission. In this embodiment, there are preferably two guide wheels 56. One of them is set in the second bearing area 12 to perform the initial reversal of the flexible transmission member 52, and the other guide wheel 56 is set at the spatial boundary between the first bearing area 11 and the second bearing area 12, so as to realize the crossing of the flexible transmission member 52 from the second bearing area 12 to the first bearing area 11.

[0037] Specifically, the timing belt is laid out as follows: starting from the drive wheel 54 on the single drive unit 4, passing through the guide wheel 56 in the second bearing area 12, and then reaching the guide wheel 56 located at the junction of the two areas. When passing around the second guide wheel 56, due to the special position of this guide wheel 56, the motion plane of the timing belt is twisted by 90 degrees here. Subsequently, the timing belt enters the first bearing area 11, passes around the driven wheel 51, and completes the driving of the color block turntable 21. After that, the timing belt returns to the second bearing area 12, passes around the tension wheel 55, and finally returns to the drive wheel 54, forming a closed loop.

[0038] In this embodiment, in order to achieve precise switching and positioning between the color block component 2 and the light source component 3, the module also integrates a limiting component 6 and a positioning optical coupler 7.

[0039] Specifically, the positioning optocoupler 7 is disposed in the second bearing area 12, along the linear movement path of the flexible transmission member 52 between the drive wheel 54 and the tension wheel 55. In this embodiment, the number of positioning optocouplers 7 is preferably three, and each positioning optocoupler 7 corresponds to the working position of an LED light source 35.

[0040] Furthermore, a light-shielding structure is integrally formed on the connector 53, preferably a downwardly extending light-shielding tooth 531. The positioning optocoupler 7 itself has a U-shaped groove 71, with an infrared emitting tube on one side and a receiving tube on the other side. When the connector 53 moves with the synchronous belt, the light-shielding tooth 531 on it will insert into the optocoupler groove 71 at the target position, thereby blocking the light path inside. At the instant the light path is blocked, the optocoupler will generate a level transition, forming a "position signal".

[0041] Specifically, the limiting assembly 6 includes a first limiting arm 61 and a second limiting arm 62, located in the first bearing area 11 and the second bearing area 12 respectively, and both connected to the bearing plate 1 via a tension spring 63. Correspondingly, multiple first limiting grooves 511 are machined on the side wall of the driven wheel 51, and multiple second limiting grooves 331 are also machined on the side wall of the moving stage 33. When the single driving member 4 stops driving, under the action of the spring force, the arm ends of the two limiting arms will automatically engage with the nearest limiting groove, simultaneously mechanically locking the color block turntable 21 and the moving stage 33, thereby eliminating potential minor displacement. To reduce friction, ball bearings are preferably provided at the arm ends.

[0042] In this embodiment, the automated control logic of the entire module is completed collaboratively by the signal receiving board 8 and the light source driving board 9. The signal receiving board 8 is mounted on the second bearing area 12 of the bearing plate 1, and the light source driving board 9 is vertically mounted on the signal receiving board 8. The signal receiving board 8 is electrically connected to the single driving component 4 and the light source driving board 9. The user can issue switching commands through an external control handle or host computer software.

[0043] Specifically, the control flow of the signal receiving board 8 is as follows: When the signal receiving board 8 receives a switching command for an LED light source 35 that requires a specific wavelength of light, the microcontroller inside the signal receiving board 8 drives the single drive unit 4 to control the stepper motor to rotate in a preset direction and number of steps. The stepper motor, through the linkage transmission mechanism 5, drives the light source slider 31 to move until the required LED light source 35 is located at the interface between the first bearing area 11 and the second bearing area 12. During this process, the color separation block turntable 21 rotates synchronously until the color separation block 22, which carries the excitation sheet, color separation sheet, and cutoff sheet matching the required LED light source 35, is horizontally aligned with the LED light source 35. When the light-shielding tooth 531 on the connector 53 moves to the positioning optocoupler 7 corresponding to the required LED light source 35, the light-shielding tooth 531 inserts into the optocoupler groove 71, generating a "positioning signal". The signal receiving board 8 detects this "positioning signal" and immediately performs two actions: sending a stop pulse to the single drive unit 4 to stop its operation; and sending a command to the light source driver board 9 to illuminate the corresponding LED light source 35. At the instant the motor stops, the first limiting arm 61 and the second limiting arm 62 of the mechanical limiting assembly 6 are engaged into the corresponding first limiting groove 511 and second limiting groove 331 under the action of spring force, completing the final mechanical locking.

[0044] In this embodiment, to facilitate the application of this module in actual equipment, a microscope interface plate 10 and a housing 100 are also provided. The microscope interface plate 10 is inserted at the junction of the first support area 11 and the second support area 12. Its size and screw hole positions are compatible with the accessory interfaces of mainstream fluorescence microscopes, allowing this module to be easily installed on existing microscopes as a plug-and-play external functional unit without any modification to the microscope body. The housing 100 is disposed in the second support area 12 and includes a left exterior component 101, a right exterior component 102, and a rear cover plate 103, completely covering the entire second support area 12.

[0045] In this embodiment, the LED light source and its related circuits on the light source assembly 3 are electrically connected to the fixed signal receiving board 8 through flexible flat cables and drag chain cables 81, so as to adapt to its long-term, high-frequency reciprocating linear motion without damage.

[0046] The working principle of a single-drive linkage illumination module for a fluorescence microscope provided in this application embodiment is as follows: When the external control system issues a switching command, the signal receiving board 8 controls the single drive unit 4 to start, and the drive wheel 54 on its output shaft drives a closed-loop flexible transmission unit 52 to start moving. Within the second bearing area 12, the moving stage 33 is rigidly fixed to the straight section of the flexible transmission member 52 via a connector 53. Therefore, the linear displacement of the flexible transmission member 52 will directly drive the moving stage 33, thereby causing the LED light source 35 on the light source bearing platform 34 to move linearly along the guide rail 32 to switch to the target LED light source 35. At the same time, the flexible transmission component 52, through a guide wheel 56 set at the junction of the two areas, causes its motion plane to rotate 90 degrees, thereby entering the first bearing area 11 and driving the driven wheel 51, which is coaxially fixed with the color block turntable 21, to rotate. During the movement, the light-blocking teeth 531 on the connector 53, which moves synchronously with the light source assembly 3, will travel to the positioning optocoupler 7 at the target position and insert into its groove 71 to block the light path, thereby instantly generating a clear "positioning signal". After capturing this "positioning signal", the signal receiving board 8 immediately performs two actions: 1. Sending a stop command to the single drive unit 4; 2. Instructing the light source drive board 9 to light up the LED light source 35 at the current position, realizing precise linkage between "movement stop" and "light source lighting"; At the moment the driving force disappears, the first limiting arm 61 and the second limiting arm 62 in a set of spring-driven limiting components 6 will automatically engage with the first limiting groove 511 on the driven wheel 51 and the second limiting groove 331 on the moving table 33, to perform the final physical positioning of the entire system and effectively resist vibration and external force interference.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A single-drive linkage illumination module for a fluorescence microscope, characterized in that, include: The support plate (1) includes a first support area (11) and a second support area (12), which are arranged perpendicular to each other; A color block assembly (2) is disposed in the first bearing area (11), and the color block assembly (2) is configured to perform a rotational movement; A light source assembly (3) is disposed in the second bearing area (12), and the light source assembly (3) is configured to be capable of linear motion; A single drive unit (4) is disposed in the second bearing area (12); as well as The linkage transmission mechanism (5) is connected to the single drive unit (4), the color block assembly (2) and the light source assembly (3). The linkage transmission mechanism (5) is configured to convert the output motion of the single drive unit (4) into the rotational motion of the color block assembly (2) and the linear motion of the light source assembly (3) at the same time, so as to realize the synchronous switching of the two.

2. The single-drive linkage illumination module for a fluorescence microscope according to claim 1, characterized in that, The color block assembly (2) includes a color block turntable (21) and multiple color blocks (22) disposed on the turntable. The light source assembly (3) includes a light source slider (31), a guide rail (32), a moving platform (33), a light source support platform (34), and multiple LED light sources (35). The moving platform (33) is disposed on the light source slider (31), the light source support platform (34) is disposed on the moving platform (33), and the multiple LED light sources (35) are mounted on the light source support platform (34). The color blocks (22) correspond one-to-one with the LED light sources (35). The linkage transmission mechanism (5) is configured to drive the color block turntable (21) to rotate and synchronously drive the light source slider (31) to move linearly along the guide rail (32).

3. A single-drive linkage illumination module for a fluorescence microscope according to claim 2, characterized in that, The linkage transmission mechanism (5) includes a driven wheel (51), a flexible transmission member (52), and a connecting member (53). The driven wheel (51) is coaxially fixed with the color block turntable (21). The flexible transmission member (52) is wound around the driven wheel (51). One end of the connecting member (53) is fixedly connected to the moving platform (33), and the other end is fixedly connected to the flexible transmission member (52), so that the rotational movement of the driven wheel (51) and the linear movement of the moving platform (33) occur synchronously.

4. A single-drive linkage illumination module for a fluorescence microscope according to claim 3, characterized in that, The linkage transmission mechanism (5) further includes a drive wheel (54), a tension wheel (55), and a guide wheel (56) connected to the single drive member (4). The drive wheel (54) and the tension wheel (55) are both located in the second bearing area (12). The guide wheel (56) is located at the junction of the first bearing area (11) and the second bearing area (12) and is configured to guide the movement path of the flexible transmission member (52) to deflect between the first bearing area (11) and the second bearing area (12).

5. A single-drive linkage illumination module for a fluorescence microscope according to claim 4, characterized in that, It also includes a limiting component (6) configured to mechanically limit the movement of the color block turntable (21) and the moving platform (33) when they stop moving.

6. A single-drive linkage illumination module for a fluorescence microscope according to claim 5, characterized in that, The limiting assembly (6) includes a first limiting arm (61) and a second limiting arm (62). The first limiting arm (61) is located on the side of the driven wheel (51) near the second bearing area (12), and the second limiting arm (62) is located on the side of the tension wheel (55) away from the drive wheel (54). The first limiting arm (61) cooperates with the driven wheel (51), and the second limiting arm (62) cooperates with the moving table (33).

7. A single-drive linkage illumination module for a fluorescence microscope according to claim 6, characterized in that, The driven wheel (51) has a plurality of first limiting grooves (511) on its side wall, and the moving platform (33) has a plurality of second limiting grooves (331) on its side wall. The arm ends of the first limiting arm (61) and the second limiting arm (62) respectively abut against the first limiting groove (511) and the second limiting groove (331) to achieve limiting.

8. A single-drive linkage illumination module for a fluorescence microscope according to claim 4, characterized in that, A light-shielding structure is provided on the connector (53), and a plurality of positioning optical couplers (7) are provided between the drive wheel (54) and the tension wheel (55). The positioning optical coupler (7) is configured such that when the connector (53) moves to a preset position following the flexible transmission member (52), the light-shielding structure blocks the optical path of the positioning optical coupler (7) and generates a positioning signal.

9. A single-drive linkage illumination module for a fluorescence microscope according to claim 8, characterized in that, The positioning optocoupler (7) has a groove (71), and the light-shielding structure is a light-shielding tooth (531). The teeth of the light-shielding tooth (531) are configured to be inserted into the groove (71) to block the optical path of the positioning optocoupler (7) and thereby generate the positioning signal.

10. A single-drive linkage illumination module for a fluorescence microscope according to claim 8, characterized in that, It also includes a signal receiving board (8) and a light source driving board (9). The signal receiving board (8) is disposed in the second bearing area (12). The light source driving board (9) is connected to the signal receiving board (8). The signal receiving board (8) is electrically connected to the single driving unit (4) and the light source driving board (9). The signal receiving board (8) is configured to receive external control commands to control the operation of the single driving unit (4); and to receive the positioning signal generated by the positioning optocoupler (7). Based on the positioning signal, the light source driving board (9) is controlled to light up the LED light source (35) corresponding to the preset position, while the single driving unit (4) is controlled to stop operating.

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