Microscope tube

Abstract

The utility model relates to a microscope tube, and belongs to the technical field of microscopes. The middle lens group and the optical assembly are installed in the cylinder body, the middle lens group comprises a primary objective lens, a middle objective lens, a driving shaft and a driving assembly driving the driving shaft to rotate, a first driving groove and a second driving groove are formed in the driving shaft, and the first driving groove and the second driving groove are arranged up and down respectively; the first driving groove and the second driving groove are spirally formed around the driving shaft and are opposite in spiral direction, the middle objective lens comprises a middle lens frame and two middle lens bodies, the middle lens frame is provided with a first driving column and is inserted into the first driving groove in a sliding mode, the two middle lens bodies are installed in the cylinder body in a sliding mode, and the two middle lens bodies change along with the sliding distance. The two middle lens bodies are installed on the middle lens frame in a sliding mode and slide along with the middle lens frame, and the primary objective lens is consistent with the middle objective lens in assembly mode and matched with the second driving groove. The utility model has the effect of accelerating the adjustment speed of the middle lens group without changing the screw pitch.

Description

Technical Field

[0001] The present application relates to the field of microscopes, and in particular to a microscope tube. Background Art

[0002] A microscope is an optical instrument composed of a lens or a combination of several lenses. It is mainly used to magnify tiny objects so that they can be seen by the naked eye. A stereo microscope is a type of microscope, also known as a "solid microscope", "stereo microscope" or "operating and dissecting microscope". It is a microscope with a stereoscopic sense of an upright image. A stereo microscope uses two independent optical pathways to generate a three-dimensional optical image. Therefore, when observing, the sample can present a three-dimensional appearance. A stereo microscope consists of a common primary objective lens. The two light beams after the object is imaged are separated by two groups of intermediate objective lenses - zoom lenses, and form a certain angle called a stereoscopic angle of view, which is generally 12 degrees to 15 degrees. The image is then formed through the respective eyepieces. Its magnification change is obtained by changing the distance between the intermediate lens groups. Using a dual-channel optical path, the left and right light beams in the binocular tube are not parallel, but have a certain angle, providing a three-dimensional image for the left and right eyes.

[0003] The lens barrel is a cylindrical component in a microscope, with an eyepiece installed at the upper end and an objective lens installed at the lower end. The lens barrel of a stereo microscope is more complicated than that of a general microscope because it needs to realize complex functions. It is generally equipped with an eyepiece, an intermediate lens group consisting of two objective lenses, and an optical component that forms an optical path. The magnification change of a stereo microscope is obtained by changing the distance between the two objective lenses of the intermediate lens group. The primary objective lens of the two objective lenses of an existing stereo microscope is generally fixed at the bottom, and the magnification adjustment is achieved by adjusting the height of the intermediate objective lens. Specifically, the intermediate objective lens is driven by a driving shaft to move closer to and away from the primary objective lens. A driving groove is spirally opened on the driving shaft. The intermediate objective lens is slidably installed inside the lens barrel. The intermediate objective lens is connected to the driving shaft by inserting a driving column into the driving groove. When the driving shaft rotates, the driving column moves axially along the driving shaft according to the position of the driving groove, thereby driving the intermediate objective lens to move.

[0004] The middle objective lens of the middle lens group in the above-mentioned lens barrel is driven to move by the driving groove, and the adjustment speed of the middle objective lens is affected by the pitch of the driving groove per rotation of the driving shaft. If the middle objective lens needs to be adjusted faster, the pitch needs to be larger, and the corresponding groove wall inclination of the driving groove is higher, and the support for the driving column is poor. If the friction of the sliding installation of the middle objective lens is low, especially after long-term use and wear, it is easy for the middle objective lens to move in the opposite direction under the action of gravity after adjustment, driving the driving shaft to rotate. If the friction of the sliding installation of the middle objective lens is high, it will affect the labor-saving degree of the operation, and it is necessary to quickly adjust while maintaining the pitch of the driving groove. Utility Model Content

[0005] In order to maintain the pitch of the driving groove spirally opened on the driving shaft and improve the adjustment speed of the distance between the intermediate objective lens and the primary objective lens, the present application provides a microscope tube.

[0006] The microscope tube provided in this application adopts the following technical solution:

[0007] A microscope tube comprises a tube body, an eyepiece mounted on the tube body, and an intermediate lens group and an optical component mounted in the tube body, wherein the intermediate lens group comprises a primary objective lens, an intermediate objective lens, a driving shaft, and a driving component for driving the driving shaft to rotate, wherein a first driving groove and a second driving groove are provided on the driving shaft, wherein the first driving groove and the second driving groove are respectively arranged up and down, and the first driving groove and the second driving groove are spirally provided around the driving shaft and have opposite spiral directions, wherein the intermediate objective lens comprises an intermediate lens frame and two intermediate lens bodies, wherein the intermediate lens frame is provided with a first driving column and is slidably inserted in the first driving groove, wherein the two intermediate lens bodies are both slidably installed in the tube body, and the two intermediate lens bodies change with the sliding spacing, wherein the two intermediate lens bodies are slidably installed on the intermediate lens frame and slide together with the intermediate lens frame, and the primary objective lens is assembled in the same manner as the intermediate objective lens and cooperates with the second driving groove.

[0008] By adopting the above technical solution, the first drive groove and the second drive groove are set to cooperate with the primary objective lens and the intermediate objective lens respectively. Since the first drive groove and the second drive groove rotate in opposite directions, when the drive shaft rotates, the primary objective lens and the intermediate objective lens can move away from and towards each other, thereby realizing the adjustment of the magnification of the intermediate lens group. Since the first drive groove and the second drive groove are set, the drive shaft can rotate one circle to drive the primary objective lens and the intermediate objective lens to move, and the adjustment is faster, and the pitch of the first drive groove and the second drive groove can be smaller.

[0009] Optionally, the pitch of the first driving groove is smaller than that of the second driving groove.

[0010] By adopting the above technical solution, the primary objective lens and the intermediate objective lens are located higher above each other when they are close to each other, and the distance between the objective lens of the intermediate lens group and the optical component is shorter, resulting in smaller impact.

[0011] Optionally, it also includes guide columns for sliding installation of the intermediate mirror body, and there are two groups of guide columns, and the two groups of guide columns correspond to the two intermediate mirror bodies one by one. One group of guide columns has two columns, which are respectively set as a main guide column and a secondary guide column. One side of the intermediate mirror body is fitted with the main guide column, and the other side of the intermediate mirror body is abutted with the secondary guide column.

[0012] By adopting the above technical solution, the sliding direction of the intermediate objective lens is guided by the cooperation of two guide columns, and the intermediate objective lens is fixed inside the lens barrel, wherein the main guide column is provided for direct installation of the intermediate objective lens to maintain the stability of the installation of the intermediate objective lens, and the auxiliary guide column abuts against the intermediate objective lens, thereby limiting the rotation of the intermediate objective lens around the main guide column, so that the state of the intermediate objective lens remains stable, and the auxiliary guide column also plays a supporting role for the other side of the intermediate objective lens. At the same time, because the auxiliary guide column and the intermediate objective lens are not directly connected like the main guide column, the dimensional accuracy requirement is lower, and the main guide column and the auxiliary guide column are not easy to interfere with each other during installation, and it is not easy to cause the intermediate objective lens to be unable to be installed.

[0013] Optionally, the intermediate objective lens also includes a first elastic steel wire, the intermediate lens body is protrudingly provided with a first linkage column, the middle part of the intermediate lens frame cooperates with the driving shaft, and first linkage grooves for sliding of the first linkage column are opened at both ends of the intermediate lens frame, and the groove width of the first linkage groove is larger than the diameter of the first linkage column, and the first elastic steel wire elastically abuts the first linkage column and drives the first linkage column to abut the groove wall of the first linkage groove.

[0014] By adopting the above technical solution, the diameter of the first linkage column is smaller than the width of the first linkage groove, so that the intermediate mirror body can slide more smoothly. At the same time, force is applied to the first linkage column through the first elastic steel wire, so that the intermediate mirror body is not easy to fluctuate in the first linkage groove when sliding, thereby keeping the two intermediate mirror bodies at the same height.

[0015] Optionally, the end of the first linkage column protrudes out of the first linkage groove, and the end of the first linkage column is provided with a first slot for the first elastic steel wire to be inserted into.

[0016] By adopting the above technical solution, the cooperation between the first elastic steel wire and the first linkage column is made more stable.

[0017] Optionally, the middle of the first elastic steel wire is fixed to the middle frame, and two ends of the first elastic steel wire respectively abut against two of the first linkage columns.

[0018] By adopting the above technical solution, force is applied to the two linkage columns through a first elastic steel wire, fewer parts are required, and the structure is simpler and more effective.

[0019] Optionally, the intermediate mirror frame is mounted on the driving shaft, and the intermediate mirror frame is provided with a first driving hole for the driving shaft to pass through, the first driving column includes a driving nut head and a driving screw, the portion of the driving screw rod close to the driving nut head is provided with an external thread and is threadedly mounted on the intermediate mirror frame, the end portion of the driving screw rod enters the first driving hole and is inserted into the first driving groove, and the steel wire rope is clamped and fixed between the driving nut head and the intermediate mirror frame.

[0020] By adopting the above technical solution, the process of installing the first driving column also completes the installation of the first elastic steel wire, the installation process is simpler, and the first driving column is effectively utilized.

[0021] Optionally, the drive assembly includes a manual drive member and a direct drive member, the manual drive member includes a manual drive rod, and the direct drive member includes a direct drive column, the axis of the manual drive rod is perpendicular to the axis of the direct drive column, the manual drive rod drives the direct drive column to rotate via gears, the direct drive column is located next to the drive shaft and the axis is parallel to the drive shaft, and the direct drive column drives the drive shaft via gears.

[0022] By adopting the above technical solution, the manual drive component does not directly drive the drive shaft, but first changes the transmission direction through the direct drive component and then drives the drive shaft to rotate through the direct drive component, thereby effectively utilizing the space next to the drive shaft. The fixed position of the end of the drive shaft can be set higher, and the part of the entire lens barrel where the middle lens group is installed can be shorter.

[0023] To summarize, by setting the first drive groove and the second drive groove, the primary objective lens and the intermediate objective lens are matched respectively. Since the first drive groove and the second drive groove rotate in opposite directions, when the drive shaft rotates, the primary objective lens and the intermediate objective lens can move away from and towards each other, thereby realizing the adjustment of the magnification of the intermediate lens group. Since the first drive groove and the second drive groove are set, the drive shaft can rotate one circle to drive the primary objective lens and the intermediate objective lens to move, and the adjustment is faster, and the pitch of the first drive groove and the second drive groove can be smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the lens barrel in the embodiment itself;

[0025] Figure 2 It is a schematic diagram of the structure of the lens barrel in the embodiment itself without part of the outer shell;

[0026] Figure 3 It is a schematic diagram of the installation structure of the inner bracket and the intermediate mirror group in the embodiment itself;

[0027] Figure 4 It is a schematic diagram of the structure of the drive shaft in the embodiment itself;

[0028] Figure 5 It is a schematic diagram of the installation structure of the drive shaft and the primary objective lens in the embodiment itself;

[0029] Figure 6 It is a schematic diagram of the structure of the primary frame in the embodiment itself.

[0030] Description of reference numerals: 10, inner bracket; 1, outer shell; 11, intermediate connecting shell; 111, limiting ring; 12, upper shell; 121, left half shell; 122, right half shell; 13, lower shell; 2, eyepiece; 3, intermediate lens group; 31, primary objective lens; 311, primary lens frame; 312, primary lens body; 313, second elastic steel wire; 314, second driving hole; 315, second driving column; 3151, driving screw head; 3152, driving screw rod; 316, second linkage column; 317, second linkage groove; 318, second clamping groove; 32, intermediate objective lens; 321, intermediate lens frame; 322, intermediate lens body; 323, first elastic steel wire; 324 , first driving hole; 325, first driving column; 326, first linkage column; 327, first linkage slot; 328, first card slot; 33, guide column; 331, main guide column; 332, auxiliary guide column; 34, driving shaft; 341, first driving slot; 342, second driving slot; 343, second spur gear; 35, driving assembly; 351, manual driving member; 3511, manual driving rod; 3512, first bevel gear; 3513, rotary cover; 352, direct driving member; 3521, direct driving column; 3522, second bevel gear; 3523, first spur gear; 4, optical assembly; 5, mounting plate; 6, plane mirror; 7, roller. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-6 This application is described in further detail.

[0032] The embodiment of the present application discloses a microscope tube.

[0033] A microscope tube comprises a tube body, an eyepiece 2 mounted on the tube body, and an intermediate lens group 3 and an optical component 4 mounted in the tube body. The tube body comprises an inner bracket 10 and an outer shell 1. The middle and lower part of the inner bracket 10 is semi-enclosed to form a space for installing the intermediate lens group 3. The inner bracket 10 is larger at the top and smaller at the bottom. The upper part of the inner bracket 10 and the upper space are used for installing the optical component 4. The outer shell 1 comprises an intermediate connecting shell 11, an upper shell 12 and a lower shell 13. The intermediate connecting shell 11 is in a circular ring shape, and a circle of limiting rings 111 are integrally suspended on the upper outer wall of the intermediate connecting shell 11. The intermediate connecting shell 11 is fitted on the middle part of the inner bracket 10 from bottom to top, and the limiting ring 111 of the intermediate connecting shell 11 is fixed with screws to the part of the inner bracket 10 suspended from the upper end.

[0034] The upper shell 12 includes a left half shell 121 and a right half shell 122, respectively. The left half shell 121 and the right shell are assembled and fixed. At the same time, the limit ring 111 on the middle connecting shell 11 is located inside the upper shell 12. The opening below the upper shell 12 shrinks toward the outer wall of the middle connecting shell 11, and cooperates with the limit ring 111, so that the upper shell 12 and the middle connecting shell 11 are associated and cannot be separated from each other. The upper shell 12 wraps the upper part of the inner bracket 10 and also wraps and protects the optical component 4 on the upper part of the inner bracket 10, wherein the optical component 4 is a component composed of multiple components such as prisms, lenses and reflectors for adjusting the optical path of light. The light passing through the middle lens group 3 is guided to the eyepiece 2 through the optical component 4, and the eyepiece 2 is located on one side of the upper part of the upper shell 12.

[0035] The lower shell 13 is sleeved on and wraps the lower part of the inner bracket 10 , and the upper end of the lower shell 13 is threadedly connected to the middle connecting shell 11 .

[0036] The intermediate lens group 3 includes a primary objective lens 31, an intermediate objective lens 32, a guide column 33, a driving shaft 34 and a driving assembly 35 for driving the driving shaft 34 to rotate. The mounting structure of the primary objective lens 31 is consistent with the mounting structure of the intermediate objective lens 32. A mounting plate 5 is provided at the lower end of the inner bracket 10. The inner bracket 10 surrounds the edge of the mounting plate 5 to form a semi-enclosed area. A circular hole is provided on the left and right sides of the mounting plate 5 and is installed with a plane mirror 6 for sealing but not blocking light. The area wrapped by the inner bracket 10 is located on one side of the two plane mirrors 6 on the mounting plate 5, and the driving shaft 34 is located on the other side of the plane mirror 6. The lower end of the driving shaft 34 is rotatably connected to the mounting plate 5, and the upper end of the driving shaft 34 is rotatably connected to the upper part of the inner bracket 10. Specifically, the driving shaft 34 is connected to the upper part of the inner bracket 10. The upper end of the moving shaft 34 is rotatably connected through a bearing, and the lower end of the driving shaft 34 abuts against the mounting plate 5 through a roller 7. A groove for the roller 7 to be embedded in the end face of the driving shaft 34 is provided, so that the driving shaft 34 can rotate. The outer wall of the driving shaft 34 is spirally provided with a first driving groove 341 and a second driving groove 342. The first driving groove 341 is located above the second driving groove 342, and the pitch of the first driving groove 341 is smaller than that of the second driving groove 342. The number of turns of the first driving groove 341 is consistent with the number of turns of the second driving groove 342, and the directions of the first driving groove 341 and the second driving groove 342 are opposite. The driving shaft 34 is used to drive the primary objective lens 31 and the intermediate objective lens 32 to slide along the axial direction of the driving shaft 34.

[0037] The guide column 33 is used for sliding installation of the primary objective lens 31 and the intermediate objective lens 32. There are two groups of guide columns 33, and the two groups of guide columns 33 correspond to the two plane mirrors 6 one by one. One group of guide columns 33 has two respectively set as a main guide column 331 and a sub-guide column 332. The two main guide columns 331 are located on the exposed side of the inner bracket 10 relative to the plane mirror 6 and are arranged on both sides of the driving shaft 34. The sub-guide column 332 and the main guide column 331 of each group of guide columns 33 are arranged on both sides of the plane mirror 6. The lower end of the guide column 33 is fixed to the mounting plate 5, and the upper end of the guide column 33 is fixed to the upper part of the inner bracket 10, and the upper ends of the two groups of four guide columns 33 are inclined toward the outside.

[0038] Taking the primary objective lens 31 as an example, the primary objective lens 31 includes a primary lens frame 311, two primary lens bodies 312 and a second elastic steel wire 313. The middle part of the primary lens frame 311 cooperates with the driving shaft 34. Specifically, the primary lens frame 311 is mounted on the driving shaft 34. The primary lens frame 311 is provided with a second driving hole 314 for the driving shaft 34 to pass through. At the same time, the primary lens frame 311 is provided with a second driving column 315 that cooperates with the driving shaft 34. The second driving column 315 includes a driving screw head 3151 and a driving screw rod 3152. The diameter of the driving screw head 3151 is larger than the diameter of the driving screw rod 3152. The driving screw rod 3152 is provided with an outer screw near the driving screw head 3151. The primary mirror frame 311 is threadedly installed on the primary mirror frame 311, and the axis of the end of the driving screw rod 3152 radially enters the second driving hole 314 along the second driving hole 314 and is inserted into the second driving groove 342, and the end of the second driving column 315 can slide in the second driving groove 342, so that when the driving shaft 34 rotates, the position of the second driving column 315 in the second driving groove 342 changes, thereby driving the primary mirror frame 311 to change its position accordingly, and the middle part of the second steel wire rope is wound around the driving screw rod, and the wound part of the second steel wire rope is clamped and fixed between the driving screw head 3151 and the intermediate mirror frame 321. In this embodiment, the second steel wire rope is wound twice, and the two ends of the steel wire rope extend crosswise to both sides.

[0039] The two primary mirror bodies 312 are slidably installed on the intermediate mirror frame 321 and slide together with the intermediate mirror frame 321. Specifically, the primary mirror body 312 is generally annular with a lens in the middle. The two primary mirror bodies 312 correspond to two plane mirrors 6 along the sliding direction. The primary mirror body 312 has a hole on one side close to the primary mirror frame 311 and is mounted on the main guide column 331. The other side of the primary mirror body 312 has a groove for the secondary guide column 332 to be inserted, thereby realizing the coordinated sliding installation of the primary mirror body 312 and a group of guide columns 33.

[0040] The primary mirror body 312 is provided with two linkage columns protruding on one side close to the primary mirror frame 311, and second linkage grooves 317 for horizontal sliding of two second linkage columns 316 are provided at both ends of the primary mirror frame 311. The groove width of the second linkage groove 317 is greater than the diameter of the second linkage column 316. At the same time, the groove width at both ends of the second linkage groove 317 is greater than the groove width in the middle area. The second linkage groove 317 protrudes from the end of the second linkage column 316, and a second clamping groove 318 for the second elastic steel wire 313 to be clamped into is provided at the end of the second linkage column 316. The two ends of the second elastic steel wire 313 are tilted upward and clamped downward into the second clamping groove 318. The second elastic steel wire 313 elastically abuts against the second linkage column 316 and drives the second linkage column 316 to keep abutting against the lower groove wall of the second linkage groove 317.

[0041] Due to the tilted setting of the guide column 33 , the distance between the two primary objective lenses 31 changes as the driving shaft 34 slides, which just adapts to the tilted light from the two plane mirrors 6 entering the optical component 4 .

[0042] The intermediate objective lens 32 includes an intermediate lens frame, two intermediate lens bodies 322 and a first elastic steel wire 323. The intermediate objective lens 32 cooperates with the first driving groove 341 and is located above the primary objective lens 31. Specifically, the intermediate objective lens 32 includes an intermediate lens frame 321 and an intermediate lens body 322. The corresponding intermediate lens frame 321 is provided with a first driving hole 324 for the driving shaft 34 to pass through. First linkage holes are provided on both sides of the intermediate lens frame 321. The two intermediate lens bodies 322 correspond to the two primary lens bodies 312 one by one. The two intermediate lens bodies 322 also cooperate with the two groups of guide columns 33 for sliding. The intermediate lens body 322 protrudes a first linkage column 326 that passes through the first linkage hole and provides a first annular groove 328. The intermediate lens frame 321 is provided with a first driving column 325, and the first elastic steel wire 323 is fixed by the first driving column 325 and is clamped into the first groove 328.

[0043] The driving assembly 35 includes a manual driving member 351 and a direct driving member 352. The manual driving member 351 includes a rotary cover 3513, a manual driving rod 3511 and a first bevel gear 3512 installed on the manual driving rod 3511. Both ends of the manual driving rod 3511 pass through the upper shell 12 and are located outside the upper shell 12. The rotary cover 3513 has two ends of the manual driving rod 3511 respectively for driving the manual driving rod 3511 to rotate. The manual driving rod 3511 is rotatably installed on the upper part of the inner bracket 10. The first bevel gear 3512 is installed in the middle of the manual driving rod 3511. The manual driving rod 3511 1 is perpendicular to the axis of the drive shaft 34, the direct drive member 352 includes a direct drive column 3521 and a second bevel gear 3522 and a first spur gear 3523 mounted on the direct drive column 3521, the direct drive column 3521 is located beside the upper end of the drive shaft 34 and above the manual drive rod 3511, the axis of the direct drive column 3521 is parallel to the axis of the drive shaft 34, a second spur gear 343 meshing with the first spur gear 3523 is mounted on the upper end of the drive shaft 34, the second bevel gear 3522 is located at the lower end of the direct drive column 3521 and meshing with the first bevel gear 3512.

[0044] The implementation principle of a microscope tube in the embodiment of the present application is: a first driving slot 341 and a second driving slot 342 are opened through a driving shaft 34, thereby driving the intermediate objective lens 32 and the primary objective lens 31 to move relative to or toward each other to achieve rapid adjustment of the magnification.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A microscope tube, characterized in that: The invention comprises a barrel, an eyepiece (2) mounted on the barrel, an intermediate lens group (3) and an optical component (4) mounted inside the barrel, wherein the intermediate lens group (3) comprises a primary objective lens (31), an intermediate objective lens (32), a drive shaft (34) and a drive component (35) for driving the drive shaft (34) to rotate, wherein the drive shaft (34) is provided with a first drive groove (341) and a second drive groove (342), wherein the first drive groove (341) and the second drive groove (342) are arranged upper and lower, respectively, and the first drive groove (341) and the second drive groove (342) are spirally formed around the drive shaft (34) and have opposite spiral directions. The intermediate objective lens (32) comprises an intermediate lens frame (321) and two intermediate lens bodies (322); the intermediate lens frame (321) is provided with a first driving column (325) and is slidably inserted into the first driving groove (341); the two intermediate lens bodies (322) are both slidably installed in the barrel, and the two intermediate lens bodies (322) change with the sliding spacing; the two intermediate lens bodies (322) are slidably installed on the intermediate lens frame (321) and slide together with the intermediate lens frame (321); the primary objective lens (31) is assembled in the same manner as the intermediate objective lens (32) and cooperates with the second driving groove (342).

2. A microscope tube according to claim 1, characterized in that: The pitch of the first driving groove (341) is smaller than that of the second driving groove (342).

3. A microscope tube according to claim 1, characterized in that: It also includes a guide column (33) for slidingly mounting the intermediate mirror body (322), wherein the guide column (33) has two groups, and the two groups of guide columns (33) correspond to the two intermediate mirror bodies (322) one by one, and one group of guide columns (33) has two, which are respectively set as a main guide column (331) and a secondary guide column (332), and one side of the intermediate mirror body (322) is fitted with the main guide column (331), and the other side of the intermediate mirror body (322) is abutted with the secondary guide column (332).

4. A microscope tube according to claim 1, characterized in that: The intermediate objective lens (32) further comprises a first elastic steel wire (323); the intermediate lens body (322) is protrudingly provided with a first linkage column (326); the middle portion of the intermediate lens frame (321) cooperates with the driving shaft (34); first linkage grooves (327) for sliding movement of the first linkage column (326) are provided at both ends of the intermediate lens frame (321); the groove width of the first linkage groove (327) is greater than the diameter of the first linkage column (326); the first elastic steel wire (323) elastically abuts against the first linkage column (326) and drives the first linkage column (326) to abut against the groove wall of the first linkage groove (327).

5. A microscope tube according to claim 4, characterized in that: The end of the first linkage column (326) protrudes out of the first linkage groove (327), and the end of the first linkage column (326) is provided with a first clamping groove (328) for the first elastic steel wire (323) to be clamped into.

6. A microscope tube according to claim 4, characterized in that: The middle of the first elastic steel wire (323) is fixed to the middle mirror frame (321), and the two ends of the first elastic steel wire (323) respectively abut against the two first linkage columns (326).

7. A microscope tube according to claim 6, characterized in that: The intermediate mirror frame (321) is sleeved on the driving shaft (34), and the intermediate mirror frame (321) is provided with a first driving hole (324) for the driving shaft (34) to pass through. The first driving column (325) comprises a driving screw head (3151) and a driving screw rod (3152). The portion of the driving screw rod (3152) close to the driving screw head (3151) is provided with an external thread and is threadedly mounted on the intermediate mirror frame (321). The end of the driving screw rod (3152) enters the first driving hole (324) and is inserted into the first driving groove (341), and the first elastic steel wire (323) is clamped and fixed between the driving screw head (3151) and the intermediate mirror frame (321).

8. A microscope tube according to claim 7, characterized in that: The drive assembly (35) comprises a manual drive member (351) and a direct drive member (352); the manual drive member (351) comprises a manual drive rod (3511); the direct drive member (352) comprises a direct drive column (3521); the axis of the manual drive rod (3511) is perpendicular to the axis of the direct drive column (3521); the manual drive rod (3511) drives the direct drive column (3521) to rotate via a gear; the direct drive column (3521) is located beside the drive shaft (34) and the axis is parallel thereto; the direct drive column (3521) drives the drive shaft (34) via a gear.

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