A microscope with an objective lens exchange device and an operation method thereof

Abstract

The present invention relates to the technical field of microscopes, and specifically relates to a microscope with an objective lens exchange device, which includes a microscope main body and an objective lens exchange assembly. The objective lens exchange assembly includes an objective lens adjustment main disc. A plurality of internal thread sleeves are provided at the lower end of the objective lens adjustment main disc. An objective lens is screwed onto each internal thread sleeve. Two groups of fixing strips are symmetrically arranged on the outside of each objective lens. The upper ends of the fixing strips are fixedly connected to the objective lens adjustment main disc. A telescopic strip is installed inside each group of fixing strips. The bottom of the telescopic strip is connected to a bottom support, and a plugging assembly is arranged inside the bottom support; a group of push plates are installed in each telescopic strip in a limited sliding manner. A pressing block is arranged on the inner wall of the push plate. One end of the pressing block away from the push plate extends out of the telescopic strip and abuts against the outer wall of the objective lens; An operation method of a microscope with an objective lens exchange device is also provided, which can ensure the safety, cleanliness and good optical performance of the objective lens when it is not in use.

Description

Technical Field

[0001] The present invention relates to the technical field of microscopes, and particularly to a microscope with an objective lens exchange device and its operation method. Background Art

[0002] As an important optical instrument, microscopes are widely used in fields such as biology, medicine, and materials science. Traditional microscopes usually come with fixed objective lenses, and observations are made through objective lenses of different magnifications. However, in scenarios of high-throughput experiments or real-time observations, the ability to quickly change objective lenses is particularly crucial, but traditional designs often fail to meet this high-efficiency requirement.

[0003] The Chinese utility model patent with the application number CN202222072477.3 discloses an automatic objective lens switching mechanism and its optical microscope. By setting an adjustment component, it can drive the objective lens disc to rotate, and the objective lens disc drives the objective lens to rotate, so that the objective lens with the magnification required by people is aligned with the object to be observed on the glass slide, thereby completing the automatic switching of the objective lens and avoiding the trouble of manually adjusting and rotating the objective lens disc in the traditional way.

[0004] Although the above device improves the switching efficiency of the objective lens to a certain extent, since the objective lens is usually installed on the objective lens disc in a threaded connection manner, the rapid switching of the objective lens disc may cause jitter of the objective lens itself, affecting the imaging stability; in addition, multiple objective lenses with different magnifications are usually distributed on one objective lens disc, and the lengths of objective lenses with different magnifications are different. For the convenience of switching and viewing, most objective lenses do not have protective covers, resulting in the exposure of the lens, which may be affected by humidity, temperature changes, and chemical substances, thereby affecting the optical properties, making regular cleaning and maintenance necessary, but frequent cleaning may cause more damage. Summary of the Invention

[0005] The purpose of the present invention is to provide a microscope with an objective lens exchange device and its operation method to solve the problems raised in the above background art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a microscope with an objective lens exchange device, comprising a microscope main body and an objective lens exchange assembly arranged on the microscope main body, the objective lens exchange assembly comprising an objective lens adjustment main disk, one end of the objective lens adjustment main disk is limitedly rotatably mounted on the microscope main body, the other end of the objective lens adjustment main disk is provided with a plurality of internal threaded sleeves distributed in a ring array, each internal threaded sleeve is screwed with an objective lens, and the outside of each objective lens is symmetrically provided with two groups of fixing bars, the upper end of the fixing bars is fixedly connected to the objective lens adjustment main disk, a group of telescopic bars is detachably installed inside each group of fixing bars through a clamping assembly, the bottoms of the two groups of telescopic bars are commonly connected with a bottom bracket, the bottom bracket sleeve is arranged at the bottom of the objective lens, and a blocking assembly is arranged inside the bottom bracket, the blocking assembly comprises five groups of shielding plates distributed in a ring array, and the plurality of shielding plates perform synchronous forward and reverse rotation motions under the drive of the linkage assembly, so as to open or close the lens of the objective lens;

[0007] A set of pushing plates are installed inside each set of telescopic bars for limited sliding. A pressing block is fixedly connected to one end of the pushing plate close to the base. The end of the pressing block away from the pushing plate extends out of the telescopic bars and contacts the outer wall of the objective lens. A pushing component for pushing the linkage assembly is also provided on the microscope body.

[0008] Preferably, the objective lens adjustment main disk is externally fixedly sleeved with a driven gear ring, the driven gear ring is meshingly connected with a toggle gear, and the toggle gear is rotationally mounted on the microscope body in a limited position and driven to rotate by a rotating component.

[0009] Preferably, the clamping assembly includes an adjusting screw, an internal screw hole is penetrated through the bottom of the fixing strip, and no less than 6 adjustment holes are provided on the telescopic strip. A knob is fixedly connected to one end of the adjusting screw, and the other end of the adjusting screw penetrates through the internal screw hole and the adjustment hole in sequence and is abutted against the pushing plate; a return spring is fixedly provided at one end of the pushing plate away from the adjusting screw, and an end of the pressure block close to the objective lens is arranged in an arc shape.

[0010] Preferably, a central shaft is fixedly inserted at one end of the shield plate, and the central shaft is rotatably installed in the base. An arc groove is penetrated through each set of shield plates, and a toggle rod is inserted in the arc groove. The upper end of the toggle rod is connected to the linkage assembly.

[0011] Preferably, the linkage assembly includes a longitudinal moving bar, a return spring, a cylindrical pin, a cylindrical cam, a vertical rotating shaft, a spur gear and an outer gear ring. The outer gear ring is installed in a limited rotation in the base, and the upper end of the toggle rod is fixedly connected to the outer gear ring.

[0012] Preferably, one end of the external gear ring is meshed and connected with a spur gear. A vertical rotating shaft is fixedly inserted in the middle of the spur gear. The upper half of the vertical rotating shaft is fixedly sleeved with a cylindrical cam. A cylindrical pin is inserted in the groove of the cylindrical cam. The cylindrical pin is fixedly connected with a longitudinal moving bar. A return spring is fixedly arranged at the lower end of the longitudinal moving bar.

[0013] Preferably, one end of the longitudinal moving bar away from the cylindrical pin extends out of the bottom support and is fixedly connected with a wedge block, and the wedge block is in contact connection with a pushing component.

[0014] Preferably, the pushing component includes a touch bar and a mounting frame. The upper end of the mounting frame is fixedly connected to the microscope body. One end of the touch bar is adjustably mounted on the mounting frame, and the other end of the touch bar is in contact connection with the inclined surface end of the wedge block.

[0015] Preferably, the touch bar is installed on the mounting frame in a limited sliding manner and fixed by screws. The number of touch bars is the same as that of the objective lenses, and the height of each group of touch bars corresponds to the distance between the objective lens and the stage.

[0016] An operation method of a microscope with an objective lens exchange device, the operation method includes the following steps:

[0017] S1: First, place the microscope on the experimental table. First, install the eyepiece, and then screw each objective lens onto the main objective lens adjustment disc one by one. Then, by adjusting the height of the telescopic bar, drive the bottom support to move up and down, so as to sleeved on the bottom of each objective lens one by one. Without external interference, multiple shutter plates are closed with each other, so as to shield and protect the unused objective lens.

[0018] S2: After the objective lens is installed, hold the mirror arm with the right hand, place the glass slide specimen to be observed on the stage, and press it with the slide clamp. The glass slide specimen should be directly opposite the center of the light hole.

[0019] S3: Then, by rotating the main objective lens adjustment disc, use the low-power objective lens to align with the light hole to obtain a large field of view for observing the glass slide. In this process, the wedge block on the low-power objective lens is squeezed by the uppermost touch bar and moves downward, so as to drive the linkage component, thereby opening the opening of the bottom support, so that the lens of the low-power objective lens can normally observe the glass slide specimen; observe the sample through the low-power objective lens and perform preliminary focusing to ensure that the sample is in a clearly visible state.

[0020] S4: When you need to switch the objective lens, turn the objective adjustment main plate again to rotate the appropriate high-power objective lens to the top of the slide. During this process, the lens of the low-power objective lens is blocked and protected again, while the lens of the high-power objective lens in use is opened, so that the state of the slide can be observed normally; and turn the coarse focusing screw to slowly lower the lens barrel, and look at the objective lens to avoid crushing the slide until the objective lens is close to the slide specimen. Look into the eyepiece with your left eye, and turn the coarse focusing screw in the opposite direction to slowly raise the lens barrel until you can see the image. If the image is not clear, you can adjust the fine focusing screw to make it clearer.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention can make the base suitable for objective lenses of different lengths by arranging mutually sleeved fixed strips and telescopic strips, and can provide a plurality of synchronously rotating shielding plates in the base, so as to shield and protect the lens of the objective lens in an idle state without affecting the normal use of the objective lens. The shielding can effectively prevent dust and other pollutants from falling on the lens surface, and protect it from the influence of humidity, temperature changes and chemicals, thereby maintaining the stability of optical performance, and reducing the frequency of regular cleaning, thereby reducing the complexity and cost of maintenance work.

[0023] 2. The length of the push plate in the present invention is set to be greater than the total length of the multiple adjustment holes. This arrangement allows the adjustment screw to be unaffected by the position of the telescopic strip and can always push the pressure block to move inward. The setting of the pressure block can assist in locking and limiting the objective lens, reducing shaking and displacement during use, thereby providing a more stable imaging effect.

[0024] 3. The present invention can convert the downward pressing force of the trigger bar on the wedge block into the synchronous rotation movement of multiple shielding plates through the design of the longitudinal moving bar, the return spring, the cylindrical pin, the cylindrical cam, the vertical rotating shaft, the spur gear, the outer gear ring, the toggle rod and the arc groove, so as to quickly open the lens of the objective lens resting on the glass slide, so that the observation work can be carried out smoothly.

[0025] 4. By setting up multiple sets of trigger bars for use with the mounting frame, and the height of the trigger bars corresponds to the distance between the objective lens and the loading plate, this setting can squeeze and push the wedge blocks on the bottom bracket at different heights, so that each set of objective lenses moved just above the slide can be smoothly opened and put into use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention.

[0027] Figure 2 It is a schematic diagram of another viewing angle of the structure of the present invention.

[0028] Figure 3 Schematic connection diagram of the objective lens exchange component of the present invention and the microscope main body.

[0029] Figure 4 Stereoscopic schematic diagram of the objective lens exchange component of the present invention.

[0030] Figure 5 Schematic diagram of a partial structure of the objective lens exchange component of the present invention.

[0031] Figure 6 Schematic connection diagram of the objective lens, fixing strip and bottom bracket of the present invention.

[0032] Figure 7 Schematic sectional view of the fixing strip, telescopic strip and bottom bracket of the present invention.

[0033] Figure 8 Explosion schematic diagram of the objective lens, fixing strip, telescopic strip and bottom bracket of the present invention.

[0034] Figure 9 Schematic connection diagram of the pressing block, telescopic strip and bottom bracket of the present invention.

[0035] Figure 10 Explosion schematic diagram of the shielding plate, external gear ring, cylindrical cam and wedge block of the present invention.

[0036] In the figure: 1. Microscope main body; 2. Dial gear; 3. Driven gear ring; 4. Main objective lens adjustment disc; 5. Internal thread sleeve; 6. Objective lens; 7. Bottom bracket; 8. Telescopic strip; 801. Adjustment hole; 9. Fixing strip; 901. Internal screw hole; 10. Adjusting screw; 11. Mounting bracket; 12. Touching strip; 13. Pressing block; 14. Pushing plate; 15. Wedge block; 16. Longitudinal moving strip; 17. Return spring; 18. Cylindrical pin; 19. Cylindrical cam; 20. Vertical rotating shaft; 21. Straight gear; 22. External gear ring; 23. Dial rod; 24. Arc groove; 25. Shielding plate; 26. Central shaft; 27. Connecting ring. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figures 1 to 10, the present invention provides a technical solution: a microscope with an objective lens 6 exchange device, comprising a microscope body 1 and an objective lens 6 exchange component arranged on the microscope body 1, the objective lens 6 exchange component comprising an objective lens adjustment main disk 4, one end of the objective lens adjustment main disk 4 is limitedly rotatably installed on the microscope body 1, the other end of the objective lens adjustment main disk 4 is provided with a plurality of internal threaded sleeves 5 distributed in a ring array, each internal threaded sleeve 5 is screwed with an objective lens 6, and the outside of each objective lens 6 is symmetrically provided with two groups of fixing bars 9, the upper end of the fixing bars 9 is fixedly connected to the objective lens adjustment main disk 4, and a group of telescopic bars 8 is detachably installed inside each group of fixing bars 9 through a clamping component, the bottom of the two groups of telescopic bars 8 are commonly connected with a bottom bracket 7, the bottom bracket 7 is sleeved on the bottom of the objective lens 6, and a blocking component is arranged inside the bottom bracket 7, the blocking component comprises five groups of shielding plates 25 distributed in a ring array, and the plurality of shielding plates 25 perform synchronous forward and reverse rotation motions under the drive of the linkage component, so as to open or close the lens of the objective lens 6;

[0039] A group of pushing plates 14 are installed inside each group of telescopic bars 8 for limited sliding. The end of the pushing plate 14 close to the base 7 is fixedly connected to a pressing block 13. The end of the pressing block 13 away from the pushing plate 14 extends out of the telescopic bar 8 and contacts the outer wall of the objective lens 6. A pushing component for pushing the linkage assembly is also provided on the microscope body 1.

[0040] Furthermore, the present invention can make the base 7 suitable for objective lenses 6 of different lengths by providing a fixed strip 9 and a telescopic strip 8 that are interconnected, and a plurality of synchronously rotating shielding plates 25 are provided in the base 7, so that the lens of the objective lens 6 in an idle state can be shielded and protected without affecting the normal use of the objective lens 6. The shielding can effectively prevent dust and other contaminants from falling on the lens surface, and protect it from the influence of humidity, temperature changes and chemicals, thereby maintaining the stability of the optical performance, and reducing the frequency of regular cleaning, thereby reducing the complexity and cost of maintenance work.

[0041] like Figures 2 - 4 As shown, the objective lens adjustment main plate 4 is externally fixedly sleeved with a driven gear ring 3, the driven gear ring 3 is meshingly connected with a toggle gear 2, and the toggle gear 2 is limitedly rotatably mounted on the microscope body 1 and driven to rotate by a rotating component.

[0042] Specifically, the toggle gear 2 is driven to rotate by the rotating component, and the toggle gear 2 acts on the driven gear ring 3, so that the driven gear ring 3 drives the objective lens adjustment main disk 4 to rotate.

[0043] like Figures 7 - 9As shown, the clamping assembly includes an adjusting screw 10, an inner screw hole 901 is formed through the bottom of the fixing strip 9, and no less than 6 adjusting holes 801 are formed on the telescopic strip 8. A knob is fixedly connected to one end of the adjusting screw 10, and the other end of the adjusting screw 10 passes through the inner screw hole 901 and the adjusting hole 801 in sequence and is abutted against a push plate 14; a return spring is fixedly provided at one end of the push plate 14 away from the adjusting screw 10, and an end of the pressure block 13 close to the objective lens 6 is arranged in an arc shape.

[0044] Furthermore, the length of the pushing plate 14 is set to be greater than the total length of the multiple adjustment holes 801. This setting can ensure that the adjusting screw 10 is not affected by the position of the telescopic strip 8 and can always push the pressing block 13 to move inward. The setting of the pressing block 13 can assist in locking and limiting the objective lens 6, reduce shaking and displacement during use, and thus provide a more stable imaging effect.

[0045] like Figures 8 - 10 As shown, a central shaft 26 is fixedly inserted at one end of the shield plate 25, and the central shaft 26 is rotatably mounted in the bottom bracket 7. An arc groove 24 is penetrated through each set of shield plates 25, and a toggle rod 23 is inserted in the arc groove 24. The upper end of the toggle rod 23 is connected to the linkage assembly. The linkage assembly includes a longitudinal moving bar 16, a reset spring 17, a cylindrical pin 18, a cylindrical cam 19, a vertical rotating shaft 20, a spur gear 21 and an outer gear ring 22. The outer gear ring 22 is limitedly rotatably mounted in the bottom bracket 7, and the upper end of the toggle rod 23 is fixedly connected to the outer gear ring 22. One end of the outer gear ring 22 is meshedly connected with a spur gear 21, a vertical rotating shaft 20 is fixedly inserted in the middle of the spur gear 21, a cylindrical cam 19 is fixedly sleeved on the upper half of the vertical rotating shaft 20, a cylindrical pin 18 is inserted in the wheel groove of the cylindrical cam 19, the cylindrical pin 18 is fixedly connected to the longitudinal moving bar 16, and a return spring 17 is fixedly provided at the lower end of the longitudinal moving bar 16.

[0046] Furthermore, through the design of the longitudinal moving bar 16, the return spring 17, the cylindrical pin 18, the cylindrical cam 19, the vertical rotating shaft 20, the spur gear 21, the outer gear ring 22, the toggle rod 23 and the arc groove 24, the downward squeezing force of the trigger bar 12 on the wedge block 15 can be converted into the synchronous rotation movement of multiple shielding plates 25, so as to quickly open the lens of the objective lens 6 resting just above the glass slide, so that the observation work can be carried out smoothly.

[0047] Specifically, the objective lens adjustment main disc 4 drives a plurality of objective lenses 6 to rotate clockwise. When a group of objective lenses 6 is just above the glass slide, the inclined surface of the wedge block 15 on this group of objective lenses 6 is squeezed downward by a group of trigger bars 12, causing the longitudinal movement bar 16 to squeeze the return spring 17 and drive the cylindrical pin 18 to move downward. The cylindrical pin 18 acts on the cam groove of the cylindrical cam 19, causing the cylindrical cam 19 to be stressed and drive the vertical rotating shaft 20 and the spur gear 21 to rotate clockwise. The spur gear 21 acts on the external gear ring 22, causing the external gear ring 22 to drive a plurality of central shafts 26 to perform circular motion, causing a plurality of shutter plates 25 to rotate with the central shaft 26 as the rotation axis, thereby opening the opening of the bottom tray 7 and enabling the lens of this group of objective lenses 6 to normally observe the glass slide.

[0048] As Figures 4 - 6 shown, one end of the longitudinal movement bar 16 away from the cylindrical pin 18 extends out of the bottom tray 7 and is fixedly connected with a wedge block 15. The wedge block 15 is in contact connection with the pushing component. The pushing component includes a trigger bar 12 and a mounting bracket 11. The upper end of the mounting bracket 11 is fixedly connected to the microscope main body 1. One end of the trigger bar 12 is adjustably mounted on the mounting bracket 11, and the other end of the trigger bar 12 is in contact connection with the inclined surface end of the wedge block 15. The trigger bar 12 is limit slidably mounted on the mounting bracket 11 and is fixed by screws. The number of trigger bars 12 is the same as that of the objective lenses 6, and the height of each group of trigger bars 12 corresponds to the distance between the objective lens 6 and the stage.

[0049] Furthermore, by setting multiple groups of trigger bars 12 to cooperate with the mounting bracket 11, and the height of the trigger bar 12 corresponds to the distance between the objective lens 6 and the stage, such a setting can squeeze and push the wedge block 15 on the bottom tray 7 of different heights, so that the lens of each group of objective lenses 6 moved to just above the glass slide can be smoothly opened and put into use.

[0050] Specifically, first use the low-power objective lens 6 to align with the light hole to obtain a large field of view for observing the glass slide. Then rotate the objective lens adjustment main disc 4 so that a higher-power objective lens 6 is aligned with the glass slide. During this process, the second trigger bar 12 from top to bottom squeezes the wedge block 15, causing this group of wedge blocks 15 to move downward under force.

[0051] When the present invention is in use: First, place the microscope on the experimental table, install the eyepiece first, then screw and install the objective lenses 6 one by one on the objective lens adjustment main disc 4. Then, by adjusting the height of the telescopic bar 8, drive the bottom support 7 to move up and down, so as to sleeved on the bottom of each objective lens 6 one by one. Without the interference of external forces, the elastic force of the return spring 17 acts on the longitudinal moving bar 16, so that the longitudinal moving bar 16 drives the cylindrical pin 18 to move upward. The cylindrical pin 18 acts on the wheel groove of the cylindrical cam 19, so that the vertical rotating shaft 20 drives the spur gear 21 to rotate counterclockwise. The spur gear 21 acts on the external gear ring 22, so that the external gear ring 22 drives a plurality of shutter plates 25 to rotate synchronously. The plurality of shutter plates 25 are closed with each other, so as to shield and protect the lenses of the unused objective lenses 6; After the installation of the objective lens 6 is completed, hold the microscope arm with the right hand, and place the glass slide specimen to be observed on the stage and press it with the clip. The glass slide specimen should be directly opposite the center of the light hole.

[0052] Then drive the dial gear 2 to rotate through the rotating member. The dial gear 2 acts on the driven gear ring 3, so that the driven gear ring 3 drives the objective lens adjustment main disc 4 to rotate; By rotating the objective lens adjustment main disc 4, use the low-power objective lens 6 to align with the light hole to obtain a large field of view for observing the glass slide. The inclined surface of the wedge block 15 on the low-power objective lens 6 is squeezed by the uppermost trigger bar 12 and moves downward, so that the longitudinal moving bar 16 squeezes the return spring 17 and drives the cylindrical pin 18 to move downward. The cylindrical pin 18 acts on the cam groove of the cylindrical cam 19, so that the cylindrical cam 19 is forced to drive the vertical rotating shaft 20 and the spur gear 21 to rotate clockwise. The spur gear 21 acts on the external gear ring 22 again, so that the external gear ring 22 drives a plurality of central shafts 26 to perform circular motion, so that the plurality of shutter plates 25 rotate around the central shaft 26 as the rotation axis, so as to open the opening of the bottom support 7, so that the lens of the low-power objective lens 6 can normally observe the glass slide specimen; Observe the sample through the low-power objective lens 6 and perform preliminary focusing to ensure that the sample is in a clearly visible state. Note the distance between the objective lens 6 and the sample. Before switching to the high-power objective lens 6, appropriately increase the light source intensity to obtain sufficient brightness during high-power observation.

[0053] When the objective lens 6 needs to be switched, the toggle gear 2 is driven to rotate again through the rotating component, and the toggle gear 2 acts on the driven gear ring 3, so that the driven gear ring 3 drives the objective lens adjustment main disk 4 to rotate, and the appropriate high-power objective lens 6 is rotated to the top of the glass slide. In this process, the lens of the low-power objective lens 6 is blocked and protected again, while the lens of the high-power objective lens 6 put into use is opened, and the state of the glass slide can be observed normally; in this process, ensure that the objective lens 6 does not touch the sample to avoid damage. Turn the coarse focusing screw to slowly lower the lens barrel, and look at the lens of the objective lens 6 to avoid crushing the glass slide, until the objective lens 6 is close to the glass slide specimen. Look into the eyepiece with your left eye, and turn the coarse focusing screw in the opposite direction at the same time, so that the lens barrel slowly rises until the image is seen. If the image is not clear, you can adjust the fine focusing screw to make the image clearer.

[0054] A method for operating a microscope having an objective lens exchange device, the method comprising the following steps:

[0055] S1: First, place the microscope on the experimental table, install the eyepiece first, then screw the objective lenses 6 one by one on the objective lens adjustment main plate 4, then adjust the height of the telescopic strip 8 to drive the bottom bracket 7 to move up and down, so that they are sleeved on the bottom of each objective lens 6 one by one, and without interference from external forces, multiple shielding plates 25 are closed to each other, so as to shield and protect the lens of the objective lens 6 that is not in use;

[0056] S2: After the objective lens 6 is installed, hold the lens arm with your right hand, and place the slide specimen to be observed on the stage, press it with the slide clamp, and the slide specimen should be facing the center of the light hole.

[0057] S3: Then, the main disk 4 is adjusted by rotating the objective lens, and the low-power objective lens 6 is used to align with the light hole to obtain a wide field of view for observing the glass slide. During this process, the wedge block 15 on the low-power objective lens 6 is squeezed by the uppermost trigger bar 12 and moves downward, thereby driving the linkage assembly to open the opening of the base 7, so that the lens of the low-power objective lens 6 can observe the glass slide specimen normally; observe the sample through the low-power objective lens 6 and perform preliminary focusing to ensure that the sample is clearly visible.

[0058] S4: When it is necessary to switch the objective lens 6, the objective adjustment main plate 4 is rotated again to rotate the appropriate high-power objective lens 6 to the top of the glass slide. In this process, the lens of the low-power objective lens 6 is blocked and protected again, while the lens of the high-power objective lens 6 in use is opened, so that the state of the glass slide can be observed normally; and the coarse focusing screw is turned to slowly lower the lens barrel, and the eyes are looking at the lens of the objective lens 6 to avoid crushing the glass slide, until the objective lens 6 is close to the glass slide specimen. Look into the eyepiece with the left eye, and at the same time, turn the coarse focusing screw in the opposite direction to slowly raise the lens barrel until the object image is seen. If the object image is not clear, the fine focusing screw can be adjusted to make the object image clearer.

[0059] This operation method can well protect the lens of the objective lens 6 and effectively improve the performance of the optical device and the user experience.

[0060] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A microscope with an objective lens exchange device, comprising a microscope body (1) and an objective lens (6) exchange assembly arranged on the microscope body (1), characterized in that: The objective lens (6) exchange component comprises an objective lens adjustment main disk (4), one end of the objective lens adjustment main disk (4) is limitedly rotatably mounted on the microscope body (1), the other end of the objective lens adjustment main disk (4) is provided with a plurality of internal thread sleeves (5) distributed in a ring array, each internal thread sleeve (5) is screwed onto an objective lens (6), and two groups of fixing bars (9) are symmetrically arranged on the outside of each objective lens (6), the upper ends of the fixing bars (9) are fixedly connected to the objective lens adjustment main disk (4), a group of telescopic bars (8) is detachably mounted inside each group of fixing bars (9) via a clamping assembly, the bottoms of the two groups of telescopic bars (8) are commonly connected to a bottom bracket (7), the bottom bracket (7) is sleeved on the bottom of the objective lens (6), and a blocking assembly is arranged inside the bottom bracket (7), the blocking assembly comprises five groups of shielding plates (25) distributed in a ring array, the plurality of shielding plates (25) perform synchronous forward and reverse rotational motion under the drive of the linkage assembly, and are used to open or close the lens of the objective lens (6); The linkage assembly comprises a longitudinal moving bar (16), a return spring (17), a cylindrical pin (18), a cylindrical cam (19), a vertical rotating shaft (20), a spur gear (21) and an outer gear ring (22); the outer gear ring (22) is mounted in a limited rotation manner in the base (7) and meshes with the spur gear (21); the spur gear (21) is fixedly connected to the vertical rotating shaft (20); the upper half of the vertical rotating shaft (20) is fixedly sleeved with a cylindrical cam (19); a cylindrical pin (18) is inserted into a wheel groove of the cylindrical cam (19); the cylindrical pin (18) is fixedly connected to the longitudinal moving bar (16); and a return spring (17) is fixedly arranged at the lower end of the longitudinal moving bar (16); A group of push plates (14) are fixedly mounted inside each group of telescopic bars (8) in a limited sliding manner. One end of the push plate (14) close to the base (7) is fixedly connected to a pressing block (13). One end of the pressing block (13) away from the pushing plate (14) extends out of the telescopic bar (8) and contacts the outer wall of the objective lens (6). One end of the pressing block (13) close to the objective lens (6) is arranged in an arc shape. One end of the push plate (14) away from the pressing block (13) is connected to the inner wall of the telescopic bar (8) via a return spring. A pushing component for pushing the linkage assembly is also arranged on the microscope body (1). The pushing component comprises a trigger bar (12) corresponding to the number of the objective lenses (6). The height of the trigger bar (12) matches the spacing between the objective lens (6) and the object carrier.

2. A microscope with an objective lens exchange device according to claim 1, characterized in that: The objective lens adjustment main disk (4) is externally fixedly sleeved with a driven gear ring (3), the driven gear ring (3) is meshingly connected with a toggle gear (2), and the toggle gear (2) is limitedly rotatably mounted on the microscope body (1) and driven to rotate by a rotating component.

3. A microscope with an objective lens exchange device according to claim 1, characterized in that: The clamping assembly comprises an adjusting screw (10), an inner screw hole (901) is formed through the bottom of the fixing strip (9), and no less than six adjusting holes (801) are formed on the telescopic strip (8). A knob is fixedly connected to one end of the adjusting screw (10), and the other end of the adjusting screw (10) passes through the inner screw hole (901) and the adjusting hole (801) in sequence and is abutted against the pushing plate (14).

4. A microscope with an objective lens exchange device according to claim 1, characterized in that: A central shaft (26) is fixedly inserted into one end of the shielding plate (25), and the central shaft (26) is rotatably mounted in the base (7). An arc groove (24) is formed through each set of shielding plates (25), and a toggle rod (23) is inserted into the arc groove (24). The upper end of the toggle rod (23) is connected to the linkage assembly.

5. The microscope with an objective lens exchange device according to claim 1, characterized in that: One end of the longitudinal moving strip (16) away from the cylindrical pin (18) extends out of the base (7) and is fixedly connected to a wedge block (15), which is abutted against the pushing component.

6. A microscope with an objective lens exchange device according to claim 5, characterized in that: The pushing component further comprises a mounting frame (11), the upper end of the mounting frame (11) being fixedly connected to the microscope body (1), one end of the trigger bar (12) being adjustably mounted on the mounting frame (11), and the other end of the trigger bar (12) being abuttingly connected to the inclined surface end of the wedge block (15).

7. A microscope with an objective lens exchange device according to claim 6, characterized in that: The trigger strip (12) is mounted on the mounting frame (11) in a limited sliding manner and is fixed by screws.

8. A method for operating a microscope with an objective lens exchange device according to any one of claims 1 to 7, characterized in that: The operation method includes the following steps: S1: First, place the microscope on the experimental table, install the eyepiece first, then screw the objective lenses (6) one by one on the objective lens adjustment main plate (4), then adjust the height of the telescopic bar (8) to drive the bottom bracket (7) to move up and down, so that they are mounted on the bottom of each objective lens (6) one by one, and without interference from external forces, multiple shielding plates (25) are closed to each other, so as to shield and protect the lens of the objective lens (6) that is not in use; S2: After the objective lens (6) is installed, hold the lens arm with your right hand and place the slide specimen to be observed on the stage and press it with the slide clamp. The slide specimen should be facing the center of the light hole. S3: Then, the main plate (4) is adjusted by rotating the objective lens, and the low-power objective lens (6) is used to align the light hole to obtain a large field of view for observing the glass slide. During this process, the wedge block (15) on the low-power objective lens (6) is squeezed by the uppermost trigger bar (12) and moves downward, thereby driving the linkage component to open the opening of the bottom support (7), so that the lens of the low-power objective lens (6) can observe the glass slide specimen normally; observe the sample through the low-power objective lens (6) and perform preliminary focusing to ensure that the sample is clearly visible; S4: When it is necessary to switch the objective lens (6), the objective adjustment main plate (4) is rotated again to rotate the appropriate high-power objective lens (6) to the top of the glass slide. During this process, the lens of the low-power objective lens (6) is blocked and protected again, while the lens of the high-power objective lens (6) in use is opened, so that the state of the glass slide can be observed normally; and the coarse focusing screw is turned to slowly lower the lens barrel, and the eyes are looking at the lens of the objective lens (6) to avoid crushing the glass slide, until the objective lens (6) is close to the glass slide specimen; the left eye looks into the eyepiece, and at the same time, the coarse focusing screw is turned in the opposite direction to slowly raise the lens barrel until the image is seen; if the image is not clear, the fine focusing screw can be adjusted to make the image clearer.

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