Microscope automatic focusing device

Abstract

The utility model belongs to the technical field of microscopes, particularly relates to an automatic focusing device of a microscope, and aims to solve the problems that manual adjustment is generally needed in the focusing and objective lens conversion process of the conventional microscope, the operation is complicated, and the objective lens is easy to damage or pollute due to misoperation in the objective lens conversion process. Comprising a base, a supporting column is fixedly arranged at the top of the base, automatic adjustment of the focal length of the microscope can be achieved through arrangement of a coarse focusing adjusting assembly and a fine focusing adjusting assembly, the operation process is simplified, the focusing precision is improved, automatic conversion of three objective lenses is achieved through arrangement of a conversion assembly, and the working efficiency is improved. The observation efficiency is greatly improved, the semi-annular blocks and the sponge pads and the superfine fiber cloth in the semi-annular blocks can automatically clean the objective lenses when the objective lens conversion table rotates to drive the three objective lenses to rotate, and pollution and damage of the objective lenses are effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of microscope technology, and in particular to an automatic focusing device for microscopes. Background Technology

[0002] A microscope is a precision optical instrument primarily used to magnify tiny objects and create images for observation. It is an important tool in scientific research and everyday experiments.

[0003] Traditional microscopes typically require manual adjustment during focusing and objective lens switching, which is not only cumbersome but also makes it difficult to achieve precise focusing. Improper objective lens switching can easily lead to damage or contamination. Therefore, we propose an automatic focusing device for microscopes to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing microscopes, which typically require manual adjustment during focusing and objective lens switching. This is not only cumbersome to operate, but also prone to objective lens damage or contamination due to improper operation. Therefore, an automatic focusing device for microscopes is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic focusing device for a microscope includes a base, a support column fixedly mounted on the top of the base, a first groove, a second groove and a third groove respectively opened on one side of the support column from top to bottom, a movable block slidably mounted on the support column, and an observation component provided on one side of the movable block.

[0007] The observation assembly includes a microscope tube, which is fixedly connected to one side of a movable block. An eyepiece is fixedly mounted on the top of the microscope tube, and an objective lens conversion stage is fixedly mounted on the bottom of the microscope tube. Three objective lenses are evenly spaced at the bottom of the objective lens conversion stage. An annular groove is provided on the side of the movable block near the objective lens conversion stage, and the outer wall of the objective lens conversion stage extends into the groove. A stage is provided on one side of the support column below the objective lens conversion stage.

[0008] Also includes:

[0009] The coarse focus adjustment component is located in the first groove and is used to drive the moving block to move up and down to adjust the coarse focus.

[0010] A fine focus adjustment component, disposed within the second groove, is used to drive the stage to move up and down to adjust the fine focus.

[0011] The conversion assembly, located on the moving block, is used for the automatic conversion of the three objectives.

[0012] In one possible design, the coarse focus adjustment assembly includes a coarse focus spiral rod, the two ends of which are rotatably connected to the top inner wall and bottom inner wall of the first groove, respectively. The coarse focus spiral rod is threaded through the moving block. A first motor is fixedly installed on the top of the support column, and the output end of the first motor passes through the top of the support column and is fixedly connected to the coarse focus spiral rod.

[0013] In one possible design, the fine focus adjustment assembly includes a fine focus screw rod, the two ends of which are rotatably connected to the top inner wall and bottom inner wall of the second groove, respectively. The fine focus screw rod is threaded with a screw nut. The support column has an opening on the side near the stage, and a fixing block is slidably connected in the opening. The two sides of the fixing block are fixedly connected to the outer wall of the screw nut and one side of the stage, respectively. A second motor is fixedly installed on the bottom inner wall of the third groove, and the output end of the second motor passes through the top inner wall of the third groove and is fixedly connected to the fine focus screw rod.

[0014] In one possible design, the conversion assembly includes a worm gear fixedly sleeved on the outer wall of the rotating disk on the objective lens conversion stage. A worm is rotatably connected inside the base and extends into the interior of a groove. The worm gear meshes with the worm. A third motor is fixedly mounted on one side of the moving block, and the output end of the third motor extends into the interior of the moving block and is fixedly connected to the worm.

[0015] In one possible design, two connecting rods are symmetrically fixed on both sides of the movable block. One end of each connecting rod is fixedly connected to the same semi-annular block. The top of the semi-annular block has an annular groove, and the curvature of the annular groove is the same as the curvature of the three objectives when they rotate. The bottoms of the three objectives extend into the interior of the annular groove. A sponge pad is provided on the inner wall of the annular groove. The top of the groove is adhered with a microfiber cloth made of extremely fine synthetic fibers. The microfiber cloth contacts the bottoms of the three objectives respectively, and is used to clean the objectives when the objective lens conversion stage rotates and drives the three objectives to rotate.

[0016] In one possible design, the platform has a light-transmitting hole, and a lighting lamp is provided on the top of the base below the light-transmitting hole.

[0017] In one possible design, an infrared sensor for measuring distance is fixedly mounted on the bottom of the moving block.

[0018] In this application, firstly, when it is necessary to adjust the focal length of the microscope, the first motor is started, which drives the coarse focus screw to rotate. Since the coarse focus screw is threadedly connected to the moving block, the moving block will move up and down under the drive of the coarse focus screw, thereby realizing the adjustment of the coarse focus.

[0019] Based on the coarse focus adjustment, the second motor starts and drives the fine focus screw to rotate. Since the fine focus screw has a nut on its thread and the nut is fixedly connected to the fixed block, and the fixed block is fixedly connected to the stage, the stage will move up and down under the drive of the fine focus screw, thereby realizing the fine focus adjustment.

[0020] When it is necessary to switch between different objectives, the third motor starts and drives the worm gear to rotate. Since the worm gear is meshed with the worm wheel and the worm wheel is fixedly sleeved on the outer wall of the rotating disk on the objective lens switching stage, the rotating disk on the objective lens switching stage will rotate under the drive of the worm gear. When the rotating disk on the objective lens switching stage rotates, the three objectives at its bottom will contact the microfiber cloth on the semi-circular block in turn, thereby realizing the automatic cleaning of the objectives. At the same time, as the objective lens switching stage rotates, different objectives will be switched to the observation position.

[0021] A light-transmitting hole is provided on the stage, and an illumination lamp is installed on the top of the base below the light-transmitting hole, which can provide sufficient light for the sample and improve the observation effect. In addition, an infrared sensor is fixedly installed on the bottom of the moving block, which can measure the distance between the moving block and the stage in real time, thereby further improving the focusing accuracy.

[0022] Beneficial effects: The microscope autofocus device described in this utility model, by setting coarse focus adjustment components and fine focus adjustment components, can realize automatic adjustment of the microscope focal length, which not only simplifies the operation process, but also improves the focusing accuracy.

[0023] In this invention, the microscope autofocus device achieves automatic switching of three objectives through the setting of the switching component, which greatly improves the observation efficiency and avoids damage to the objectives caused by improper manual operation.

[0024] In this invention, the microscope autofocus device, through a semi-annular block and the sponge pad and microfiber cloth inside it, can automatically clean the objectives when the objective lens conversion stage rotates and drives the three objectives to rotate, effectively avoiding contamination and damage to the objectives and extending the service life of the objectives.

[0025] In this invention, by setting up coarse and fine focus adjustment components, the microscope focal length can be automatically adjusted, which not only simplifies the operation process but also improves focusing accuracy. The conversion component enables automatic switching of the three objectives, greatly improving observation efficiency. Furthermore, the semi-annular block and the sponge pad and microfiber cloth inside it can automatically clean the objectives when the objective switching stage rotates, effectively avoiding contamination and damage to the objectives. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of an automatic focusing device for a microscope proposed in this utility model;

[0027] Figure 2 This is a three-dimensional structural diagram of an automatic focusing device for a microscope proposed in this utility model from another perspective.

[0028] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the moving block of an automatic focusing device for a microscope proposed in this utility model;

[0029] Figure 4 This is a three-dimensional structural diagram of a semi-annular block of an automatic focusing device for a microscope proposed in this utility model.

[0030] In the diagram: 1. Base; 2. Support column; 201. First groove; 202. Second groove; 203. Third groove; 3. Moving block; 4. Lens tube; 5. Eyepiece; 6. Objective lens conversion stage; 7. Objective lens; 8. Stage; 9. Illumination lamp; 10. Coarse focusing screw; 11. First motor; 12. Fine focusing screw; 13. Nut; 14. Second motor; 15. Worm gear; 16. Worm; 17. Third motor; 18. Connecting rod; 19. Semi-annular block; 20. Sponge pad; 21. Infrared sensor. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] Example 1: Refer to Figure 1-4 A focusing device includes a base 1, with a support column 2 fixedly mounted on the top of the base 1. A first groove 201, a second groove 202, and a third groove 203 are sequentially formed on one side of the support column 2 from top to bottom. A movable block 3 is slidably mounted on the support column 2, and an observation component is provided on one side of the movable block 3.

[0033] The observation assembly includes a microscope tube 4, which is fixedly connected to one side of a movable block 3. An eyepiece 5 is fixedly mounted on the top of the microscope tube 4 for observation. An objective lens stage 6 is fixedly mounted on the bottom of the microscope tube 4, and three objectives 7 are evenly spaced at the bottom of the objective lens stage 6 to meet the observation needs of different magnifications. The movable block 3 has an annular groove on the side near the objective lens stage 6, and the outer wall of the objective lens stage 6 extends into this groove to ensure the stability and smooth rotation of the objective lens stage 6. A stage 8 is mounted on one side of the support column 2, below the objective lens stage 6, for placing the sample to be observed.

[0034] To achieve automatic focusing, the device also includes a coarse focus adjustment assembly, a fine focus adjustment assembly, and a conversion assembly. The coarse focus adjustment assembly is located within the first groove 201 and includes a coarse focus screw 10 and a first motor 11. Both ends of the coarse focus screw 10 are rotatably connected to the top and bottom inner walls of the first groove 201, respectively, and are threaded through the moving block 3. The output end of the first motor 11 passes through the top of the support column 2 and is fixedly connected to the coarse focus screw 10. By driving the coarse focus screw 10 to rotate, the moving block 3 moves up and down, thereby achieving coarse focus adjustment.

[0035] The fine focus adjustment assembly is located within the second groove 202 and includes a fine focus screw rod 12, a screw nut 13, and a second motor 14. The two ends of the fine focus screw rod 12 are rotatably connected to the top and bottom inner walls of the second groove 202, respectively. The screw nut 13 is threaded onto the fine focus screw rod 12. The support column 2 has an opening on the side near the stage 8, and a fixing block is slidably connected within the opening. The two sides of the fixing block are fixedly connected to the outer wall of the screw nut 13 and one side of the stage 8, respectively. The output end of the second motor 14 penetrates the top inner wall of the third groove 203 and is fixedly connected to the fine focus screw rod 12. By driving the fine focus screw rod 12 to rotate, the stage 8 moves up and down, thereby achieving fine focus adjustment.

[0036] The conversion assembly is mounted on the moving block 3 and includes a worm gear 15, a worm 16, and a third motor 17. The worm gear 15 is fixedly sleeved on the outer wall of the rotating disk on the objective lens conversion stage 6. The worm 16 is rotatably connected inside the base 1, and extends into a groove inside the moving block 3, meshing with the worm gear 15. The output end of the third motor 17 extends into the moving block 3 and is fixedly connected to the worm 16. By driving the worm 16 to rotate, the motor drives the worm gear 15 and the objective lens conversion stage 6 to rotate, thereby realizing the automatic conversion of the three objectives 7.

[0037] This application can be used in the field of microscopy technology, or in other fields applicable to this application.

[0038] Example 2: Reference Figure 1-3 An improvement upon Embodiment 1: An automatic focusing device for microscopes, applied in the field of microscopy, is described. Two connecting rods 18 are symmetrically fixed to both sides of the moving block 3, with one end of each rod fixedly connected to the same semi-annular block 19. The top of the semi-annular block 19 has an annular groove, the curvature of which is the same as the curvature of the three objectives 7 when they rotate. The bottoms of the three objectives 7 extend into the interior of the annular groove, and a sponge pad 20 is provided on the inner wall of the groove. A microfiber cloth made of extremely fine synthetic fibers is adhered to the top of the sponge pad 20. When the objective stage 6 rotates, causing the three objectives 7 to rotate, the microfiber cloth contacts the bottom of the objectives 7, wiping and cleaning them to ensure clear observation.

[0039] In addition, a light-transmitting hole is provided on the stage 8, and an illumination lamp 9 is installed on the top of the base 1 below the light-transmitting hole to provide sufficient light for the observer to observe the sample. At the same time, an infrared sensor 21 for measuring distance is fixedly installed on the bottom of the moving block 3 to monitor the distance between the moving block 3 and the stage 8 in real time, providing more accurate data support for automatic focusing.

[0040] However, as is well known to those skilled in the art, the working principles and wiring methods of the first motor 11, the second motor 14 and the third motor 17 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A microscope automatic focusing device, comprising a base (1), a support column (2) is fixedly arranged on the top of the base (1), a first groove (201), a second groove (202) and a third groove (203) are sequentially arranged on one side of the support column (2) from top to bottom, a moving block (3) is slidably arranged on the support column (2), and an observation assembly is arranged on one side of the moving block (3); wherein The observation assembly comprises a lens barrel (4), the lens barrel (4) is fixedly connected with one side of the moving block (3), an ocular lens (5) is fixedly arranged on the top of the lens barrel (4), an objective lens conversion table (6) is fixedly arranged on the bottom of the lens barrel (4), three objective lenses (7) are equidistantly arranged on the bottom of the objective lens conversion table (6), a ring groove is arranged on the side of the moving block (3) close to the objective lens conversion table (6), the outer wall of the objective lens conversion table (6) extends into the groove, and a stage (8) is arranged on one side of the support column (2) below the objective lens conversion table (6). It is characterized by further comprising: a coarse focusing adjusting assembly, which is arranged in the first groove (201) and is used for driving the moving block (3) to move up and down to realize the adjustment of coarse focusing; a fine focusing adjusting assembly, which is arranged in the second groove (202) and is used for driving the stage (8) to move up and down to realize the adjustment of fine focusing; a conversion assembly, which is arranged on the moving block (3) and is used for automatically converting the three objective lenses (7).

2. A microscope autofocusing device according to claim 1, wherein The coarse focusing adjusting assembly comprises a coarse focusing screw rod (10), both ends of the coarse focusing screw rod (10) are rotatably connected with the top inner wall and the bottom inner wall of the first groove (201), the coarse focusing screw rod (10) is threaded through the moving block (3), a first motor (11) is fixedly arranged on the top of the support column (2), and the output end of the first motor (11) penetrates through the top of the support column (2) and is fixedly connected with the coarse focusing screw rod (10).

3. A microscope autofocusing device according to claim 1, wherein The fine focusing adjusting assembly comprises a fine focusing screw rod (12), both ends of the fine focusing screw rod (12) are rotatably connected with the top inner wall and the bottom inner wall of the second groove (202), a screw female (13) is threaded on the fine focusing screw rod (12), an opening is arranged on one side of the support column (2) close to the stage (8), a fixed block is slidably connected in the opening, the two sides of the fixed block are fixedly connected with the outer wall of the screw female (13) and one side of the stage (8), respectively, a second motor (14) is fixedly arranged on the bottom inner wall of the third groove (203), and the output end of the second motor (14) penetrates through the top inner wall of the third groove (203) and is fixedly connected with the fine focusing screw rod (12).

4. A microscope autofocusing device according to claim 1, wherein The conversion assembly comprises a worm wheel (15) fixedly sleeved on the outer wall of the rotating disc on the objective lens conversion platform (6), the inside of the base (1) is rotationally connected with a worm (16) extending to the inside of the groove, the worm wheel (15) is meshedly connected with the worm (16), one side of the moving block (3) is fixedly provided with a third motor (17), the output end of the third motor (17) extends to the inside of the moving block (3) and is fixedly connected with the worm (16).

5. A microscope autofocusing device according to claim 4, wherein Two connecting rods (18) are symmetrically and fixedly arranged on the two sides of the moving block (3), one end of each of the two connecting rods (18) is fixedly connected with the same semi-annular block (19), the top of the semi-annular block (19) is provided with an annular groove, the radian of the annular groove is the same as the radian when the three objective lenses (7) rotate, the bottoms of the three objective lenses (7) extend to the inside of the annular groove, the inner wall of the annular groove is provided with a sponge pad (20), the top of the sponge pad (20) is bonded with superfine fiber cloth, the superfine fiber cloth is respectively in contact with the bottoms of the three objective lenses (7), and the superfine fiber cloth is used for cleaning the objective lenses (7) when the objective lens conversion platform (6) drives the three objective lenses (7) to rotate.

6. A microscope autofocusing device according to claim 1, wherein The base (1) is provided with an illuminating lamp (9) below the light-transmitting hole.

7. A microscope autofocusing device according to claim 1, wherein The bottom of the moving block (3) is fixedly provided with an infrared sensor (21) for measuring distance.

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