Objective lens conversion device for metallographic examination microscope

Abstract

The invention discloses an objective lens conversion device for a metallographic examination microscope, which belongs to the technical field of experimental equipment and comprises a base, a docking mechanism, an objective lens main body and a positioning mechanism, the top of the base is provided with a microscope main body, one end of the top of the microscope main body is provided with an eyepiece, one end of the bottom of the eyepiece is provided with a switching mechanism, and the switching mechanism is used for switching the eyepiece. Meanwhile, an inner magnetic ring is arranged on the outer side of the adjusting disc, an outer magnetic ring is arranged on the inner side of the fixing disc, the adjusting disc can be kept aligned with the fixing disc, magnetic suspension is adopted, the adjusting disc and the fixing disc can be in non-contact connection, friction force generated between the adjusting disc and the fixing disc in the objective lens conversion process is avoided, and the objective lens conversion efficiency is improved. Therefore, the service life is prevented from being affected by abrasion generated at the joint of the adjusting disc and the fixed disc.

Description

Technical Field

[0001] The present application relates to the technical field of experimental equipment, and in particular to an objective lens conversion device for a metallographic inspection microscope. Background Art

[0002] During the use of metallographic inspection microscopes, the objective lens conversion device is one of its core components, which is used to achieve rapid switching between objective lenses of different magnifications to meet the needs of observing different microstructures.

[0003] After searching, the patent with Chinese patent announcement number CN113759533A discloses a metallographic microscope objective automatic conversion device, in which the objective lens and the objective lens automatic conversion mechanism cooperate with each other through gears and incomplete gears, and the objective lens automatic conversion mechanism is controlled by a single chip microcomputer to realize the function of remote conversion of the objective lens, which can improve the automation degree of metallographic microscope observation of metallographic structure operation, and is particularly suitable for occasions that are not conducive to long-term manual operation, such as the analysis of metal materials at high altitudes; however, the objective lens conversion device in the prior art has some shortcomings. For example, the traditional objective lens conversion device usually adopts a mechanical structure to fix and switch the objective lens. This connection method is prone to frequent friction during long-term use, which in turn affects the positioning accuracy of the objective lens and the stability of the conversion. In addition, when the objective lens is adjusted downward in height, it may press the glass slide due to improper operation, causing the glass slide to break, thereby affecting the observation effect and increasing the experimental cost. Moreover, once some parts of the objective lens conversion device are damaged, the entire device often needs to be replaced, and the maintenance cost is high.

[0004] Therefore, how to design an objective lens conversion device that can effectively solve the above problems and improve its service life, positioning accuracy and operational safety is an urgent problem to be solved in the current field of metallographic inspection microscope technology. Summary of the invention

[0005] One of the purposes of the present application is to provide an objective lens conversion device for a metallographic inspection microscope to solve the problems of large wear, inaccurate positioning, easy compression of the glass slide leading to breakage, and high maintenance cost in the objective lens conversion device of the existing metallographic inspection microscope.

[0006] To achieve the above objectives, the technical solution adopted in the present application is: an objective lens conversion device for a metallographic inspection microscope, comprising a base, a docking mechanism, an objective lens body and a positioning mechanism; a microscope body is installed on the top of the base, an eyepiece is installed at one end of the top of the microscope body, a conversion mechanism is provided at one end of the bottom of the eyepiece, the conversion mechanism is used for eyepiece conversion, a docking mechanism is provided at the bottom of the conversion mechanism, an objective lens body is provided at the bottom of the docking mechanism, the docking mechanism is used for docking and installing the objective lens, a positioning mechanism is provided on the top surface of the docking structure, the positioning mechanism is used to adjust the alignment of the objective lens body and the eyepiece body; a docking joint is provided above the docking structure, and the docking joint is connected to the conversion mechanism.

[0007] Preferably, the conversion mechanism includes a magnetic levitation component and an isolation component, the magnetic levitation component is used for adjusting the rotation of the conversion mechanism, the magnetic levitation component is installed on the inner side of the isolation component, and the isolation component is used for positioning the internal components of the magnetic levitation mechanism. By adopting the magnetic levitation component, the contactless adjustment and rotation of the conversion mechanism is achieved by utilizing magnetic force, thereby avoiding the wear of components caused by friction in traditional mechanical rotation, thereby significantly improving the service life and operational stability of the device; at the same time, the setting of the isolation component can accurately position the various components inside the magnetic levitation component, ensuring that the magnetic levitation component always maintains a stable suspension state during operation, further improving the accuracy and reliability of objective lens conversion.

[0008] Preferably, the magnetic suspension component includes a fixed disk, a docking joint is arranged on the top of the fixed disk, a hole groove is arranged in the middle of the top of the fixed disk, and a sealing block is arranged inside the hole groove, a gap exists between the surfaces of the sealing block fixed disk, the bottom of the sealing block is fixedly connected to one end of the top of the connecting column, an upper magnetic ring is connected to the bottom of the sealing block, a middle magnetic ring is arranged below the upper magnetic ring, a lower magnetic ring is arranged below the middle magnetic ring, the outer wall of the middle magnetic ring is glued to the inner wall of the fixed disk, and the lower magnetic ring is connected to the bottom of the adjusting disk, and the hole groove in the middle of the top of the fixed disk and the sealing block can be effectively isolated from external impurities entering the magnetic suspension component. There is a gap between the sealing block and the fixed disk, which ensures the air flow balance inside the magnetic suspension assembly and avoids the magnetic suspension effect being affected by air pressure changes. The upper magnetic ring, the middle magnetic ring and the lower magnetic ring cooperate with each other and use the magnetic force principle of like poles repelling each other to make the adjustment disk float above the fixed disk to achieve contactless rotation, avoiding friction and wear in traditional mechanical rotation, and improving the accuracy and service life of objective lens conversion. The middle magnetic ring is glued to the inner wall of the fixed disk, which further enhances the stability of the magnetic suspension assembly and ensures that it always maintains a stable suspension state during the objective lens conversion process, thereby improving the observation effect and operation reliability of the microscope.

[0009] Preferably, the upper magnetic ring and the middle magnetic ring are in a state of same-pole repulsion with each other, there is a gap between the upper magnetic ring and the middle magnetic ring, the bottom of the middle magnetic ring and the lower magnetic ring are in a state of same-pole repulsion with each other, a screw is connected to the outer side of the bottom of the adjusting disk, and one end of the screw abuts against the outer side of the lower magnetic ring, by setting the upper magnetic ring and the middle magnetic ring, the middle magnetic ring and the lower magnetic ring in a state of same-pole repulsion with each other, and maintaining a certain gap between them, the repulsive effect of magnetic force is utilized to realize the suspension of the adjusting disk, thereby avoiding direct contact between the adjusting disk and the fixed disk, eliminating the wear problem caused by mechanical friction, and significantly improving the service life and operation stability of the objective lens conversion device. At the same time, the screw connected to the outer side of the bottom of the adjusting disk abuts against the outer side of the lower magnetic ring, which can effectively limit the radial displacement of the adjusting disk, ensure that the adjusting disk maintains a stable rotation accuracy in the suspended state, and further improves the accuracy and reliability of the objective lens conversion.

[0010] Preferably, an inner magnetic ring is arranged on the outer side of one end of the top of the fixed disk, and the inner wall of the inner magnetic ring is tightly fitted with the surface of the fixed disk, and an outer magnetic ring is arranged on the outer side of the inner magnetic ring, there is a gap between the outer magnetic ring and the inner magnetic ring, and the outer wall of the outer magnetic ring is glued to the inner wall of one end of the top of the adjusting disk, and the outer magnetic ring and the inner magnetic ring are in a magnetic repulsive state with each other. By arranging the inner magnetic ring and the outer magnetic ring on the outer side of the fixed disk and maintaining a repulsive magnetic relationship between them, the suspension stability between the adjusting disk and the fixed disk is further enhanced, the inner magnetic ring is tightly fitted with the fixed disk, and the connection between the outer magnetic ring and the adjusting disk provides additional radial constraints for the adjusting disk. This magnetic repulsive structural design can not only effectively prevent the adjusting disk from tilting or shifting in the suspended state, but also ensure that the adjusting disk always maintains concentricity with the fixed disk during rotation, thereby further improving the accuracy and reliability of the objective lens conversion. At the same time, this contactless suspension positioning method avoids the wear problem caused by friction in traditional mechanical positioning, extends the service life of the device, and reduces maintenance costs.

[0011] Preferably, the docking structure includes a connecting seat, which is mounted on the bottom of the adjusting disk, one end of the bottom of the connecting seat slidingly cooperates with the inside of the telescopic tube, the inner wall of the connecting seat is tightly fitted with the surface of the telescopic tube, an annular cavity is provided inside the telescopic tube, a spring is embedded in the annular cavity, one end of the top of the spring is in contact with the bottom of the connecting seat, and an annular protruding structure is provided at one end of the bottom of the connecting seat. By arranging the connecting seat, the telescopic tube and the spring in the docking structure, an elastic connection of the objective lens body is achieved. When the objective lens body contacts the glass slide during the up and down adjustment process, the spring can provide a buffering effect, so that the objective lens body can shrink upward, thereby avoiding the problem of glass slide being crushed due to pressure from the objective lens, protecting the safety of the glass slide and the objective lens. At the same time, the annular protruding structure at the bottom of the connecting seat cooperates with the annular cavity inside the telescopic tube, ensuring the stable sliding of the connecting seat in the telescopic tube, further improving the reliability and safety of the objective lens adjustment.

[0012] Preferably, the inner wall of the bottom of the telescopic tube is provided with threads, the bottom of the telescopic tube is connected to the outer wall of the ring through the threads, the inner wall of the ring is provided with threads, and the inner wall of the ring is connected to the objective lens body through the threads; by providing threads on the inner wall of the bottom of the telescopic tube and the outer wall of the ring, and connecting the telescopic tube to the ring by threaded connection, and connecting the ring to the objective lens body at the same time, this design realizes a detachable connection between the objective lens body and the docking structure, which is convenient for replacing only the ring when the threads are worn without replacing the entire device, thereby reducing maintenance costs, while also improving the flexibility of connection and the stability of the structure, and enhancing the versatility and adaptability of the device.

[0013] Preferably, the positioning mechanism includes a connecting block, one end of the bottom of the connecting block is welded to the top of the fixed disk, one end of the top of the connecting block is embedded with a fixed magnet, a positioning magnet is arranged below the fixed magnet, the positioning magnet is embedded in one end of the top of the adjusting disk, a rubber ring is glued to the inner side of the adjusting disk, and the positioning mechanism achieves precise alignment of the objective lens body and the eyepiece body through magnetic adsorption between the fixed magnet and the positioning magnet. This magnetic attraction positioning method is contactless, avoiding the wear problem caused by mechanical friction in traditional snap-fit ​​positioning, thereby extending the service life of the device. At the same time, the rubber ring provides better sealing, further improves the stability and reliability of positioning, and ensures that the eyepiece body and the objective lens body are always precisely aligned during the objective lens switching process, thereby improving the observation effect of the microscope.

[0014] Preferably, the fixed magnet and the positioning magnet are magnetically attracted to each other, and there is a gap between the positioning magnet and the fixed magnet. Four positioning magnets are arranged at equal intervals, and the four positioning magnets correspond to four objective lens positions respectively. When the positioning magnet is aligned with the fixed magnet, the eyepiece body is aligned with the objective lens body, and the objective lens body and the eyepiece body are accurately aligned through the magnetic attraction between the fixed magnet and the positioning magnet. This magnetic attraction positioning method is contactless, which avoids the wear problem caused by mechanical friction in traditional snap-fit ​​positioning, thereby extending the service life of the device. At the same time, the positioning magnets are arranged at equal intervals and correspond to four objective lens positions respectively, ensuring that the eyepiece body and the objective lens body are always accurately aligned during the objective lens switching process, thereby improving the observation effect of the microscope. In addition, there is a gap between the fixed magnet and the positioning magnet. This design avoids direct contact between the two, further reduces wear, and at the same time ensures the accuracy and reliability of positioning.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] (1) The device is provided by installing a fixed disk with a microscope body, and a middle magnetic ring is arranged inside the conversion mechanism of the device. The middle magnetic ring is connected to the inner wall of the fixed disk, and then an upper magnetic ring is arranged above the middle magnetic ring, and a lower magnetic ring is arranged below the middle magnetic ring. The upper magnetic ring and the lower magnetic ring are both connected to the adjustment disk. The upper magnetic ring and the lower magnetic ring repel the middle magnetic ring, so that the adjustment disk is in a suspended state. At the same time, an inner magnetic ring is arranged on the outer side of the adjustment disk, and an outer magnetic ring is arranged on the inner side of the fixed disk, so that the adjustment disk can be kept aligned with the fixed disk. The device adopts magnetic suspension to enable the adjustment disk and the fixed disk to be connected without contact, thereby avoiding the friction between the adjustment disk and the fixed disk during the conversion of the objective lens, thereby avoiding the wear of the connection between the adjustment disk and the fixed disk, which affects the service life.

[0017] (2) In the present invention, a connecting block is cleverly arranged on the top of the fixed disk, and a fixed magnet is installed at one end of the top of the connecting block, so that precise alignment between the objective lens body and the eyepiece body is achieved. When the operator rotates the adjustment disk to switch the objective lens, the adjustment disk will drive the positioning magnet thereon to rotate together. When the objective lens body and the eyepiece body are in an aligned state, the positioning magnet will be precisely aligned with the fixed magnet and adsorbed to each other by magnetism, thereby fixing the rotation angle of the adjustment disk at this position. This magnetic attraction positioning method has significant advantages over traditional snap-fit ​​positioning. Traditional snap-fit ​​positioning usually relies on the close fit between mechanical parts. During long-term use, it is easy to cause parts wear due to frequent mechanical friction, thereby affecting the positioning accuracy and the service life of the equipment. The contactless magnetic attraction positioning adopted by the present invention avoids the wear of the equipment caused by mechanical friction, which not only improves the stability and reliability of positioning, but also significantly extends the service life of the equipment and reduces maintenance costs. At the same time, it also improves the convenience of operation and observation effect of the microscope during the objective lens switching process.

[0018] (3) In the objective lens conversion device of the present invention, an elastic component is cleverly arranged at the bottom of the docking mechanism of the adjustment disk. This design plays a vital role in actual use. When the objective lens body contacts the glass slide during the up and down adjustment process, the eyepiece body is squeezed. At this time, the spring inside the docking mechanism will be compressed, thereby pushing the objective lens body to retract upward. This elastic buffer mechanism effectively avoids the objective lens body from exerting excessive pressure on the glass slide when the height is adjusted downward, thereby preventing the glass slide from breaking due to pressure, significantly improving the safety and reliability of microscope operation. In addition, a collar is also arranged at the bottom of the docking mechanism of the adjustment disk for docking and connecting the objective lens body with the collar. This split design has significant maintenance advantages. When the thread between the collar and the objective lens body is severely worn due to long-term use, the operator does not need to replace the entire objective lens conversion device. The operator only needs to remove the collar by a simple rotation operation and replace it with a new collar to resume normal use. This design greatly reduces the maintenance cost and difficulty, while also improving the service life and maintenance efficiency of the equipment, providing users with a more economical and convenient use experience.

[0019] This solves the problems of the existing metallographic inspection microscope's objective lens conversion device, such as large wear, inaccurate positioning, easy compression of the glass slide to cause breakage, and high maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the conversion mechanism structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the bottom structure of the conversion mechanism of the present invention.

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the conversion mechanism of the present invention.

[0024] Figure 5 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0025] Figure 6 It is a schematic diagram of the docking mechanism structure of the present invention.

[0026] Figure 7 It is a schematic diagram of the ring structure of the present invention.

[0027] Figure 8 It is a schematic diagram of the spring structure of the present invention.

[0028] In the figure: 1. base; 2. microscope body; 3. eyepiece body; 4. conversion mechanism; 401. fixed disk; 402. sealing block; 403. upper magnetic ring; 404. connecting column; 405. middle magnetic ring; 406. lower magnetic ring; 407. adjusting disk; 408. inner magnetic ring; 409. outer magnetic ring; 5. docking mechanism; 501. connecting seat; 502. telescopic tube; 503. spring; 504. collar; 6. objective lens body; 7. positioning mechanism; 701. connecting block; 702. fixed magnet; 703. positioning magnet; 704. rubber ring; 8. docking joint. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction; being constructed and operated in a specific direction cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first" and "second" in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] Embodiment 1:

[0033] One of the preferred embodiments of the present application is as follows: Figures 1 to 8As shown, an objective lens conversion device for a metallographic inspection microscope comprises a base 1, a docking mechanism 5, an objective lens body 6 and a positioning mechanism 7; a microscope body 2 is mounted on the top of the base 1, an eyepiece is mounted on one end of the top of the microscope body 2, a conversion mechanism 4 is arranged at one end of the bottom of the eyepiece, the conversion mechanism 4 is used for eyepiece conversion, a docking mechanism 5 is arranged at the bottom of the conversion mechanism 4, an objective lens body 6 is arranged at the bottom of the docking mechanism 5, the docking mechanism 5 is used for docking and installing the objective lens, a positioning mechanism 7 is arranged on the top surface of the docking structure, and the positioning mechanism 7 is used to adjust the objective lens body 6 is aligned with the eyepiece body 3; a docking joint 8 is arranged above the docking structure, and the docking joint 8 is connected to the conversion mechanism 4; the conversion mechanism 4 includes a magnetic suspension component and an isolation component, the magnetic suspension component is used to adjust the rotation of the conversion mechanism 4, the magnetic suspension component is installed on the inner side of the isolation component, and the isolation component is used for positioning the internal components of the magnetic suspension mechanism; the magnetic suspension component includes a fixed disk 401, a docking joint 8 is arranged on the top of the fixed disk 401, a hole groove is arranged in the middle of the top of the fixed disk 401, and a sealing block 402 is arranged inside the hole groove, and the sealing block 402 fixes the disk 4 01, the bottom of the sealing block 402 is fixedly connected to one end of the top of the connecting column 404, the bottom of the sealing block 402 is connected to an upper magnetic ring 403, a middle magnetic ring 405 is arranged below the upper magnetic ring 403, a lower magnetic ring 406 is arranged below the middle magnetic ring 405, the outer wall of the middle magnetic ring 405 is glued to the inner wall of the fixed disk 401, and the lower magnetic ring 406 is connected to the bottom of the adjusting disk 407; the upper magnetic ring 403 and the middle magnetic ring 405 are in a state of repelling each other with the same poles, and there is a gap between the upper magnetic ring 403 and the middle magnetic ring 405, and the middle magnetic ring 40 The bottom and the lower magnetic ring 406 are in a state of mutual repulsion of the same poles, the outer side of the bottom of the adjusting disk 407 is connected with a screw, and one end of the screw is against the outer side of the lower magnetic ring 406; the outer side of the top end of the fixed disk 401 is provided with an inner magnetic ring 408, the inner wall of the inner magnetic ring 408 is tightly fitted with the surface of the fixed disk 401, and the outer side of the inner magnetic ring 408 is provided with an outer magnetic ring 409, there is a gap between the outer magnetic ring 409 and the inner magnetic ring 408, and the outer wall of the outer magnetic ring 409 is glued to the inner wall of the top end of the adjusting disk 407, and the outer magnetic ring 409 and the inner magnetic ring 408 are in a state of mutual repulsion of magnetism;The device is provided by installing a fixed disk 401 with a microscope body 2, and a middle magnetic ring 405 is arranged inside the conversion mechanism 4 of the device, and the middle magnetic ring 405 is connected to the inner wall of the fixed disk 401, and then an upper magnetic ring 403 is arranged above the middle magnetic ring 405, and a lower magnetic ring 406 is arranged below the middle magnetic ring 405, and the upper magnetic ring 403 and the lower magnetic ring 406 are both connected to the adjustment disk 407, and the upper magnetic ring 403 and the lower magnetic ring 406 repel the middle magnetic ring 405, so that the adjustment disk 407 is in a suspended state. At the same time, an inner magnetic ring 408 is arranged on the outer side of the adjusting disk 407, and an outer magnetic ring 409 is arranged on the inner side of the fixed disk 401, so that the adjusting disk 407 can be kept aligned with the fixed disk 401. The device adopts magnetic suspension to enable a contactless connection between the adjusting disk 407 and the fixed disk 401, thereby avoiding friction between the adjusting disk 407 and the fixed disk 401 during the conversion of the objective lens, thereby avoiding wear on the connection between the adjusting disk 407 and the fixed disk 401, which affects the service life. ;

[0034] Embodiment 2:

[0035] One of the preferred embodiments of the present application is as follows: Figures 1 to 7 As shown, an objective lens conversion device for a metallographic inspection microscope, the docking structure includes a connecting seat 501, the connecting seat 501 is installed at the bottom of the adjustment disk 407, one end of the bottom of the connecting seat 501 is slidably matched with the inside of the telescopic tube 502, the inner wall of the connecting seat 501 is tightly fitted with the surface of the telescopic tube 502, an annular cavity is arranged inside the telescopic tube 502, a spring 503 is embedded inside the annular cavity, one end of the top of the spring 503 is in contact with the bottom of the connecting seat 501, and one end of the bottom of the connecting seat 501 is arranged. The inner wall of the bottom of the telescopic tube 502 is provided with a thread, the bottom of the telescopic tube 502 is connected to the outer wall of the ring 504 through a thread, the inner wall of the ring 504 is provided with a thread, and the ring The inner wall of 504 is connected to the objective lens body 6 through a thread. By arranging an elastic component at the bottom of the docking mechanism 5 of the adjusting disk 407, when the objective lens body 6 contacts the glass slide during the up and down adjustment, the eyepiece body 3 will be squeezed and the spring 503 inside the docking mechanism 5 will be compressed, so that the objective lens body 6 can shrink upward, thereby preventing the objective lens body 6 from pressing the glass slide and causing the glass slide to break when the height is adjusted downward. At the same time, a ring 504 is arranged at the bottom of the docking mechanism 5 of the adjusting disk 407, so that the objective lens body 6 and the ring 504 are docked and connected. When the thread connecting the ring 504 and the objective lens body 6 is severely worn, the ring 504 only needs to be disassembled by rotation, and there is no need to replace the entire conversion device, thereby greatly reducing the maintenance cost.

[0036] Embodiment 3:

[0037] One of the preferred embodiments of the present application is as follows: Figures 1 to 8 As shown, an objective lens conversion device for a metallographic inspection microscope, the positioning mechanism 7 includes a connecting block 701, one end of the bottom of the connecting block 701 is welded to the top of a fixed disk 401, one end of the top of the connecting block 701 is embedded with a fixed magnet 702, a positioning magnet 703 is arranged below the fixed magnet 702, the positioning magnet 703 is embedded at one end of the top of an adjustment disk 407, and a rubber ring 704 is glued to the inner side of the adjustment disk 407; the fixed magnet 702 and the positioning magnet 703 are mutually attracted by magnetism, there is a gap between the positioning magnet 703 and the fixed magnet 702, four positioning magnets 703 are arranged at equal intervals, and the four positioning magnets 703 correspond to four objective lens positions respectively, and the positioning magnets 70 3 is aligned with the fixed magnet 702, the eyepiece body 3 is aligned with the objective lens body 6, a connecting block 701 is provided on the top of the fixed disk 401, and a fixed magnet 702 is provided at one end of the top of the connecting block 701, when the adjusting disk 407 is rotated to switch the objective lens, the adjusting disk 407 will drive the fixed magnet 702 to rotate, and when the objective lens body 6 is aligned with the eyepiece body 3, the positioning magnet 703 will be aligned with the fixed magnet 702, so that the positioning magnet 703 and the fixed magnet 702 can be adsorbed and fixed, so that the rotation angle of the adjusting disk 407 can be fixed, and the magnetic attraction positioning is compared with the traditional snap-fit ​​positioning. The present solution adopts non-contact positioning, so that the conversion device will not be worn during the positioning process, which is conducive to extending the service life of the device.

[0038] This solution achieves contactless suspension between the adjustment disk 407 and the fixed disk 401 through a magnetic suspension assembly, avoiding friction and wear in traditional mechanical rotation. At the same time, it adopts contactless magnetic positioning, and uses magnetic adsorption between the fixed magnet 702 and the positioning magnet 703 to align the objective lens and the eyepiece, reducing wear during the positioning process and significantly improving the service life and reliability of the device. In addition, the elastic component at the bottom of the docking mechanism 5 can buffer the pressure between the objective lens body 6 and the glass slide, preventing the glass slide from breaking, and further improving the safety of the operation. The split ring 504 design makes it easy to replace only the ring 504 when the thread is worn, without replacing the entire device, reducing maintenance costs.

[0039] The above describes the basic principles of the present application; the main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application to be protected. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. An objective lens conversion device for a metallographic inspection microscope, characterized in that: include: A base (1), a docking mechanism (5), an objective lens body (6) and a positioning mechanism (7); a microscope body (2) is mounted on the top of the base (1); an eyepiece is mounted on one end of the top of the microscope body (2); a conversion mechanism (4) is arranged at one end of the bottom of the eyepiece; the conversion mechanism (4) is used for eyepiece conversion; a docking mechanism (5) is arranged at the bottom of the conversion mechanism (4); an objective lens body (6) is arranged at the bottom of the docking mechanism (5); the docking mechanism (5) is used for docking and mounting the objective lens; a positioning mechanism (7) is arranged on the top surface of the docking structure; the positioning mechanism (7) is used for adjusting the alignment of the objective lens body (6) and the eyepiece body (3); a docking joint (8) is arranged above the docking structure; the docking joint (8) is connected to the conversion mechanism (4).

2. The objective lens conversion device for a metallographic inspection microscope according to claim 1, characterized in that: The conversion mechanism (4) comprises a magnetic suspension component and an isolation component. The magnetic suspension component is used to adjust the rotation of the conversion mechanism (4). The magnetic suspension component is installed inside the isolation component. The isolation component is used to position the components inside the magnetic suspension mechanism.

3. The objective lens conversion device for a metallographic inspection microscope according to claim 2, characterized in that: The magnetic suspension assembly comprises a fixed disk (401), a docking joint (8) is arranged at the top of the fixed disk (401), a hole groove is arranged in the middle of the top of the fixed disk (401), and a sealing block (402) is arranged inside the hole groove, a gap exists between the sealing block (402) and the surface of the fixed disk (401), the bottom of the sealing block (402) is fixedly connected to one end of the top of the connecting column (404), the bottom of the sealing block (402) is connected to an upper magnetic ring (403), a middle magnetic ring (405) is arranged below the upper magnetic ring (403), a lower magnetic ring (406) is arranged below the middle magnetic ring (405), the outer wall of the middle magnetic ring (405) is glued to the inner wall of the fixed disk (401), and the lower magnetic ring (406) is connected to the bottom of the adjusting disk (407).

4. The objective lens conversion device for a metallographic inspection microscope according to claim 3, characterized in that: The upper magnetic ring (403) and the middle magnetic ring (405) are in a state of mutual repulsion with the same polarity, a gap exists between the upper magnetic ring (403) and the middle magnetic ring (405), the bottom of the middle magnetic ring (405) and the lower magnetic ring (406) are in a state of mutual repulsion with the same polarity, and a screw is connected to the outer side of the bottom of the adjustment disk (407), and one end of the screw abuts against the outer side of the lower magnetic ring (406).

5. The objective lens conversion device for a metallographic inspection microscope according to claim 4, characterized in that: An inner magnetic ring (408) is arranged on the outer side of one end of the top of the fixed disk (401), and the inner wall of the inner magnetic ring (408) is tightly fitted with the surface of the fixed disk (401). An outer magnetic ring (409) is arranged on the outer side of the inner magnetic ring (408), and there is a gap between the outer magnetic ring (409) and the inner magnetic ring (408), and the outer wall of the outer magnetic ring (409) is glued to the inner wall of one end of the top of the adjustment disk (407), and the outer magnetic ring (409) and the inner magnetic ring (408) are in a state of magnetic repulsion with each other.

6. The objective lens conversion device for a metallographic inspection microscope according to claim 5, characterized in that: The docking structure comprises a connecting seat (501), wherein the connecting seat (501) is mounted on the bottom of the adjusting disk (407), one end of the bottom of the connecting seat (501) is slidably matched with the inside of the telescopic tube (502), the inner wall of the connecting seat (501) is tightly fitted with the surface of the telescopic tube (502), an annular cavity is arranged inside the telescopic tube (502), a spring (503) is embedded inside the annular cavity, one end of the top of the spring (503) is in contact with the bottom of the connecting seat (501), and one end of the bottom of the connecting seat (501) is provided with an annular protruding structure.

7. The objective lens conversion device for a metallographic inspection microscope according to claim 6, characterized in that: The inner wall of the bottom of the telescopic tube (502) is provided with threads, the bottom of the telescopic tube (502) is connected to the outer wall of the collar (504) via the threads, the inner wall of the collar (504) is provided with threads, and the inner wall of the collar (504) is connected to the objective lens body (6) via the threads.

8. The objective lens conversion device for a metallographic inspection microscope according to claim 7, characterized in that: The positioning mechanism (7) comprises a connecting block (701), one end of the bottom of the connecting block (701) is welded to the top of the fixed disk (401), one end of the top of the connecting block (701) is embedded with a fixed magnet (702), a positioning magnet (703) is arranged below the fixed magnet (702), the positioning magnet (703) is embedded in one end of the top of the adjustment disk (407), and a rubber ring (704) is glued to the inner side of the adjustment disk (407).

9. The objective lens conversion device for a metallographic inspection microscope according to claim 8, characterized in that: The fixed magnet (702) and the positioning magnet (703) are mutually attracted by magnetism, and there is a gap between the positioning magnet (703) and the fixed magnet (702). Four positioning magnets (703) are arranged at equal intervals, and the four positioning magnets (703) correspond to four objective lens positions respectively. When the positioning magnet (703) and the fixed magnet (702) are aligned, the eyepiece body (3) and the objective lens body (6) are aligned.

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