Fundus ophthalmoscope module and surgical microscope

Abstract

The present invention belongs to the technical field of microscopes and discloses a fundus mirror module and a surgical microscope. The fundus mirror module includes a fixed base plate, a fundus lens main body module and a front lens module. The fundus lens main body module is slidably connected to the fixed base plate along a first direction, and the front lens module is fixedly connected to the fundus lens main body module via a retaining frame assembly. The fundus lens main body module includes a focusing lens group and a linkage support mechanism. When the fundus lens main body module slides along the fixed base plate, the linkage support mechanism synchronously drives the focusing lens group to move along a second direction. When the fundus mirror module and the surgical microscope are converted from an anterior segment mode to a posterior segment mode, the movement of the focusing lens group along the second direction can be adjusted simultaneously, so that the focusing lens group moves to a working position to meet the required imaging effect.

Description

Technical Field

[0001] The present invention relates to the technical field of microscopes, and in particular to an ophthalmoscope module and an operating microscope. Background Art

[0002] An optical observation device, such as a surgical microscope, typically includes a head portion and an ophthalmoscope module. The head portion includes a microscope main mirror body and an objective lens. The microscope main mirror body is provided with an OCT protrusion structure. The objective lens is provided on the microscope main mirror body and is located on one side of the OCT protrusion structure. The ophthalmoscope module is slidably installed on the bottom of the OCT protrusion structure. Due to the limitations and requirements of the optical path setting, the different heights of the objective lens and the OCT protrusion structure result in the bottoms of the two not being flush.

[0003] On the other hand, because different manufacturers design and produce their own ophthalmoscope modules, these modules are only well-suited to the manufacturer's own ophthalmic surgical microscopes. However, there are still some situations, such as when an ophthalmic surgical microscope from manufacturer A needs to be compatible with an ophthalmoscope module from manufacturer B. Because the distance between the objective lens and the focusing assembly of the ophthalmoscope module is initially fixed, the vertical position of the focusing lens assembly of the ophthalmoscope module needs to be adjusted to accommodate different manufacturers' head structures. Summary of the Invention

[0004] The objective of the present invention is to provide an ophthalmoscope module and a surgical microscope, aiming to solve the problem in the prior art that the vertical position of the focusing lens group of the ophthalmoscope module cannot be adjusted. When the ophthalmoscope module and the surgical microscope are converted from the anterior segment mode to the posterior segment mode, the movement of the focusing lens group along the second direction can be simultaneously adjusted so that the focusing lens group moves to the working position to meet the desired imaging effect.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A fundus ophthalmoscope module, comprising:

[0007] Fixed bottom plate;

[0008] The fundus lens main body module includes a focusing lens group and a linkage support mechanism;

[0009] A front lens module, the front lens module being fixedly connected to the fundus lens main body module via a retaining frame assembly;

[0010] The fundus lens main body module is slidably connected to the fixed base plate along a first direction; when the fundus lens main body module slides along the fixed base plate, the linkage support mechanism synchronously drives the focusing lens group to move along a second direction.

[0011] In some possible embodiments, the linkage support mechanism includes a linkage rod, which includes two branch rods fixed at an angle and a connecting shaft, wherein one branch rod is transmission-connected to the focusing lens group via a sleeve ring, and a first limiting component is fixedly provided at the end of the other branch rod, and a second limiting component corresponding to the first limiting component is provided on the fixed base plate.

[0012] In some possible embodiments, the second limiting component is a guide groove, which includes a straight groove portion and an arc-shaped groove portion that are interconnected, the arc-shaped groove portion is arranged close to the focusing lens group, and the straight groove portion is arranged away from the focusing lens group, and the extension direction of the straight groove portion is parallel to the first direction.

[0013] In some possible implementations, the first limiting component is a roller; the roller is received in the guide groove of the fixed base plate and is in rolling contact with the side wall of the guide groove.

[0014] In some possible implementations, the branch rod on which the first limiting assembly is installed is protruded with an auxiliary tooth, and the auxiliary tooth is installed with a guide structure, and the guide structure is in rolling engagement with a guide groove of the linkage support mechanism.

[0015] In some possible implementations, the sleeve ring is provided with an oblique groove, the focusing lens assembly includes a protruding rod that cooperates with the oblique groove, and one of the branch rods is rotatably connected to a connecting protrusion of the sleeve ring.

[0016] In some possible embodiments, the linkage support mechanism includes two parallel slider groups, each slider group includes at least two spaced-apart sliders, the sliders are provided with dovetail grooves, and the two opposite edges of the fixed base plate are provided with guide rails, and the two guide rails respectively correspond to the dovetail grooves of the sliders of the two slider groups.

[0017] In some possible embodiments, the ophthalmoscope module further includes a positioning structure, which includes a positioning groove and a positioning bead that are interlocked with each other, the positioning groove is provided on the linkage support mechanism, and the positioning bead is provided on the fixed base plate, or the positioning groove is provided on the fixed base plate, and the positioning bead is provided on the linkage support mechanism.

[0018] In some possible embodiments, there is also a protective cover, which is detachably mounted on the bottom of the fundus lens main body module; the front lens module is fixedly connected to the fundus lens main body module through a retaining frame assembly, or the front lens module is fixedly connected to the protective cover through a retaining frame assembly.

[0019] A surgical microscope comprises a handpiece and an ophthalmoscope module as described in any of the above schemes, wherein the handpiece comprises a main mirror body and an objective lens, the fixed base plate is mounted on the bottom of the main mirror body, the fundus lens main body module slides along the fixed base plate, and the linkage support mechanism simultaneously drives the focusing lens group to move in a second direction, so that the optical lens group of the focusing lens group and the objective lens can be coaxial.

[0020] Beneficial effects of the present invention:

[0021] The fundus mirror module provided by the present invention is configured to be slidably connected to a fixed base plate by setting a fundus lens main body module. When the fundus lens main body module slides along the fixed base plate, the linkage support mechanism synchronously drives the focusing lens group to move along the second direction, so that the focusing lens group moves to a suitable position, adapting to the head structures of different manufacturers to meet the required imaging effect.

[0022] The surgical microscope provided by the present invention includes the above-mentioned fundus mirror module. When the surgical microscope is converted from the anterior segment mode to the posterior segment mode, the movement of the focusing lens group along the second direction can be adjusted simultaneously, so that the focusing lens group moves to the working position to meet the required imaging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 1 is a schematic diagram of the state of the surgical microscope provided by an embodiment of the present invention in the anterior segment mode;

[0024] Figure 2 1 is a schematic diagram of the state of the surgical microscope provided by an embodiment of the present invention in the posterior segment mode;

[0025] Figure 3 is an exploded view of an ophthalmoscope module provided by an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the assembly of a linkage support mechanism and a focusing lens assembly at a viewing angle provided by an embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of the assembly of the linkage support mechanism and the focusing lens assembly from another perspective provided by an embodiment of the present invention;

[0028] Figure 6 1 is a schematic diagram of the assembly of a driving and focusing mechanism and a focusing lens assembly provided by an embodiment of the present invention;

[0029] Figure 7 yes Figure 6 A partial enlarged view of point A in the middle;

[0030] Figure 8 is a cross-sectional view of a focusing lens assembly provided by an embodiment of the present invention.

[0031] In the picture:

[0032] 100, ophthalmoscope module; 110, upper cover; 111, guide groove; 112, slider; 121, linkage rod; 1211, auxiliary tooth; 1212, guide structure; 122, sleeve ring; 1221, inclined groove; 1222, connecting protrusion; 123, roller; 124, connecting shaft; 130, focusing lens group; 131, protruding rod; 132, adjusting ring; 133, first lens structure; 1331, inner sleeve; 1332, first lens; 1333, rod structure; 134, second lens structure; 1341, outer sleeve; 13411, vertical groove; 1342, second lens; 140, fixed base plate; 141, guide groove; 1411, linear groove; 141 2. Arc groove; 142. Guide rail; 143. Mounting interface; 151. Positioning bead; 160. Protective cover; 170. Focusing lens group cover; 180. Retaining frame assembly; 190. Front lens assembly; 1011. Lead screw; 1012. Lead screw nut; 1013. Manual focusing knob; 1014. Driving member; 10151. Driving wheel; 10152. Driven wheel; 10153. First mounting plate; 10154. Second mounting plate; 10155. Guide rod; 10156. Guide wheel; 1016. Transmission rod; 10161. Waist groove; 1017. Driving rod; 200. Machine head; 210. Main mirror body; 211. Raised structure; 220. Objective lens. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0034] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0037] It should be noted that the term "fixed connection," such as between A and B, does not limit the relationship between A and B to a direct fixed connection. If A and B form an overall fixed positional relationship through other structures, this also falls within the scope of the fixed connection.

[0038] like Figures 1 to 5 As shown, this embodiment provides a fundusscope module 100, which includes a fixed base plate 140, a fundus lens main body module, and a front lens module. The fundus lens main body module is slidably connected to the fixed base plate 140 along a first direction, and the front lens module is fixedly connected to the fundus lens main body module via a retaining frame assembly 180. The fundus lens main body module includes a focusing lens assembly 130 and a linkage support mechanism. When the fundus lens main body module slides along the fixed base plate 140, the linkage support mechanism synchronously drives the focusing lens assembly 130 to move along a second direction. It should be noted that the second direction is not limited to the main optical axis direction for observing the anterior and posterior segments of the eye in this embodiment, which is generally vertical. If the patient is in a sitting position or non-recumbent position, this optical axis can obviously be selected from other directions to achieve limited observation of the anterior and posterior segments. The first direction is the direction along which part of the lens assembly is moved into or out of the main optical axis, which can generally be horizontal. Generally, the first direction refers to the horizontal direction, and the second direction refers to the vertical direction.

[0039] The above-mentioned fundus mirror module 100 is configured to be slidably connected to the fundus lens main body module and the fixed base plate 140. When the fundus lens main body module slides along the fixed base plate 140, the linkage support mechanism synchronously drives the focusing lens group 130 to move along the second direction, so that the focusing lens group 130 moves to a suitable position, adapting to the head 200 structure of different manufacturers to meet the required imaging effect.

[0040] like Figure 6-Figure 8 As shown, the linkage support mechanism is also provided with a driving focusing structure, and the focusing lens group 130 includes an adjusting ring 132, a first lens structure 133 slidably embedded in the adjusting ring 132, and a second lens structure 134 sleeved on the adjusting ring 132 and capable of supporting the adjusting ring 132, and the second lens structure 134 is slidably connected to the linkage support mechanism; the driving focusing mechanism includes a lead screw 1011 and a lead screw nut 1012 sleeved on the lead screw 1011, by rotating the lead screw 1011, the lead screw nut 1012 can drive the adjusting ring 132 to rotate, and the adjusting ring 132 can drive the first lens structure 133 to move along the second direction.

[0041] By relative sliding of the linkage support mechanism and the second lens structure 134, the focusing lens group 130 is adjusted to move along the second direction, so that the fundus mirror module 100 is adapted to the host structure of different manufacturers. At the same time, the screw 1011 is rotated to make the screw nut 1012 drive the adjustment ring 132 to rotate, and the adjustment ring 132 drives the first lens structure 133 to move along the second direction to adjust the relative position between the first lens structure 133 and the second lens structure 134, thereby changing the relative position between the optical components, meeting the focusing requirements, flexible focusing, and meeting the flexibility of product use.

[0042] Optionally, the linkage support mechanism includes a linkage rod 121, which comprises two branch rods fixedly arranged at an angle, and a connecting shaft 124. One of the branch rods is drivingly connected to the focusing lens assembly 130 via a sleeve ring 122. A first stop assembly is fixedly provided at the end of the other branch rod, and a second stop assembly corresponding to the first stop assembly is provided on the fixed base plate 140. When the fundus lens main body module slides along the fixed base plate 140, one of the branch rods drives the focusing lens assembly 130 in the second direction via the sleeve ring 122, causing the focusing lens assembly 130 to move to a desired position.

[0043] Furthermore, the second limiting assembly is a guide groove 141, which includes a linear groove portion 1411 and an arcuate groove portion 1412 that are interconnected. The arcuate groove portion 1412 is located near the focusing lens assembly 130, while the linear groove portion 1411 is located away from the focusing lens assembly 130. The linear groove portion 1411 extends parallel to the first direction. The linear groove portion 1411 is used to switch the ophthalmoscope module 100 between two operating modes (anterior segment mode and posterior segment mode) along the first direction, while the arcuate groove portion 1412 is used to link the support mechanism to drive the focusing lens assembly 130 to move along the second direction. It is understood that the dimensions of the linear groove portion 1411 and the arcuate groove portion 1412 can be adjusted based on the requirements of different surgical microscope optical systems to meet different distance adjustment relationships between the vertex under the microscope objective 220 and the vertex of the focusing lens assembly 130 of the ophthalmoscope module 100.

[0044] In the relevant embodiment, the first limiting assembly is a roller 123; the roller 123 is received in a guide groove 141 of the fixed base plate 140 and is in rolling contact with the sidewalls of the guide groove 141, thereby ensuring smoother movement of the first limiting assembly within the second limiting assembly. In other embodiments, the first limiting assembly can also be configured as a limiting rod, which is received in the guide groove 141 of the fixed base plate 140 and is in sliding contact with the sidewalls of the guide groove 141. Under the restraint of the guide groove 141, the limiting rod drives the end of its corresponding branch rod to move.

[0045] Optionally, the adapter ring 122 is provided with an oblique groove 1221, and the focusing lens assembly 130 includes a protruding rod 131 that cooperates with the oblique groove 1221. A branch rod is rotatably connected to the connecting protrusion 1222 of the adapter ring 122. The second lens structure 134 includes an outer sleeve 1341 and a second lens 1342 mounted on the outer sleeve 1341. The protruding rod 131 is fixed to the outer circumference of the outer sleeve 1341. Furthermore, the outer sleeve 1341 includes a concave structure at the bottom to support the adjustment ring 132 and accommodate the rotational movement of the adjustment ring 132 therein. The inner end of the concave structure is fixedly connected to the second lens 1342.

[0046] Furthermore, the connecting protrusion 1222 includes a slot, and one end of the branch rod has a protruding rod that cooperates with the slot of the connecting protrusion 1222 to drive the rotation of the connecting protrusion 1222. In some possible embodiments, one end of the branch rod may have a slot structure that accommodates the end of the connecting protrusion 1222, thereby defining one end of the connecting protrusion 1222 and achieving a corresponding driving relationship.

[0047] The fundus scope module 100 also includes a protective cover 160, which is sleeved over the focusing lens assembly 130 and detachably connected to the fundus lens main module. This arrangement facilitates assembly and disassembly of the protective cover 160. In this embodiment, the protective cover 160 is configured as a disinfection cover 160 for disinfecting and maintaining the fundus lens main module. Optionally, the linkage support mechanism also includes a focusing lens assembly outer cover 170, which is used to protect and support the focusing lens assembly 130. The protective cover 160 is also sleeved over the focusing lens assembly outer cover 170 and detachably connected thereto, thereby facilitating assembly and disassembly.

[0048] Preferably, the branch rod on which the first position-limiting assembly is mounted is provided with an auxiliary tooth 1211. A guide structure 1212 is mounted on the auxiliary tooth 1211. The guide groove 111 is provided on the linkage support mechanism, and the guide structure 1212 rolls in engagement with the guide groove 111. When the first position-limiting assembly moves along the arcuate groove portion 1412 of the guide groove 141, the guide structure 1212 assists in guiding the first position-limiting assembly, thereby improving the stability of the movement of the branch rod. Alternatively, the guide structure 1212 is a ball bearing or a guide rod.

[0049] In combination with the above embodiments or the following embodiments, further, the linkage support mechanism may optionally include a detachable and fixed upper cover body 110, the fundus lens main body module may optionally be slidably connected to the fixed base plate 140 through the upper cover body 110, the guide groove 111 may be set on the upper cover body 110, and the connecting shaft 124 may be fixedly connected to the upper cover body 110.

[0050] During the production process, it is only necessary to adjust the size of the guide groove 141 of the fixed base plate 140, and the solution of the present invention can be used in surgical microscope bodies of different manufacturers to meet the different optical system settings of each product and the configuration settings of the distance from the vertex under the main objective lens of the microscope to the vertex on the optical lens assembly of the fundus mirror. Correspondingly, the guide groove 111 of the upper cover body 110 on the linkage support mechanism also needs to be configured accordingly. In summary, the product configuration requirements of most manufacturers can be met through simple production adjustments of two parts. These parts are all detachable installation structures and can be produced in conjunction with mainstream product models in the product. Users can choose different models of these optional parts based on their needs to meet the configuration and use of different models of equipment.

[0051] Furthermore, in order to improve the movement stability of the linkage rod 121 , the connection point of the two branch rods can be rotatably connected to the linkage support mechanism via a connecting shaft 124 .

[0052] The linkage support mechanism also includes two parallel slider groups, each slider group includes at least two spaced sliders 112, the sliders 112 are provided with dovetail grooves, and the two opposite edges of the fixed base plate 140 are provided with guide rails 142. The two guide rails 142 respectively correspond to the dovetail grooves of the sliders 112 of the two slider groups, so that the sliding between the linkage support mechanism and the fixed base plate 140 is stable and reliable.

[0053] Preferably, the ophthalmoscope module 100 further includes a positioning structure, which includes a positioning groove and a positioning bead 151 that are mutually engaged. The positioning groove is provided in the linkage support mechanism, and the positioning bead 151 is provided in the fixed base plate 140. Alternatively, the positioning groove is provided in the fixed base plate 140, and the positioning bead 151 is provided in the linkage support mechanism. The provision of the positioning structure can achieve the fixation of the ophthalmoscope module 100 when switching between the two operating modes (anterior segment mode and posterior segment mode).

[0054] Optionally, the lead screw nut 1012 that drives the focusing mechanism is provided with a rotatable transmission rod 1016. The transmission rod 1016 is provided with a waist-shaped groove 10161 along the second direction. A driving rod 1017 is slidably connected within the waist-shaped groove 10161. The driving rod 1017 is fixedly connected to the adjustment ring 132. The waist-shaped groove 10161 is provided along the second direction so that the driving rod 1017 does not interfere with the movement of the focusing lens group 130 in the second direction. The driving rod 1017 can rotate under the drive of the linkage rod, and the driving rod 1017 can drive the adjustment ring 132 to rotate, thereby causing the adjustment ring 132 to drive the first lens structure 133 to move in the second direction.

[0055] In this embodiment, the adjustment ring 132 is provided with an oblique hole, the first lens structure 133 includes a rod structure 1333 that cooperates with the oblique hole, and the outer sleeve 1341 of the second lens structure 134 is provided with a limiting structure. The end of the rod structure 1333 extends into the limiting structure, allowing the first lens structure 133 to move in the second direction. The limiting structure can effectively prevent the first lens structure 133 from rotating, allowing it to move only in the second direction, thereby improving adjustment reliability. Optionally, the limiting structure is configured as a vertical groove 13411 extending along the second direction. See Figure 8 The first lens structure 133 includes an inner sleeve 1331 and a first lens 1332 installed on the inner sleeve 1331 . The first lens 1332 and the second lens 1342 are coaxially arranged along the second direction. The rod structure 1333 is fixed to the inner sleeve 1331 .

[0056] Optionally, manual focusing knobs 1013 are provided at both ends of the lead screw 1011 to facilitate manual screwing operation and improve screwing comfort.

[0057] Alternatively, the driving focusing mechanism also includes a driving member 1014, the lead screw 1011 and the output shaft of the driving member 1014 are connected by a gear assembly, and the driving member 1014 includes an electric focusing button. With such an arrangement, an electric focusing operation can be realized. Specifically, the gear assembly includes a driving wheel 10151 installed on the output shaft, two driven wheels 10152 installed at intervals on the lead screw 1011 and respectively located on both sides of the lead screw nut 1012, and a guide assembly, the guide assembly includes a first mounting plate 10153, a second mounting plate 10154, a guide rod 10155 and two guide wheels 10156, the two ends of the first mounting plate 10153 are respectively sleeved on the output shaft and the lead screw 1011 at intervals, and the first mounting plate 10153 is fixedly connected to the main body of the driving member 1014. One of the guide wheels 10156 is rotatably mounted on the first mounting plate 10153 and is engaged with the driving wheel 10151 and one of the driven wheels 10152, and the other guide wheel 10156 is rotatably mounted on the second mounting plate 10154 and is engaged with the other driven wheel 10152, and the second mounting plate 10154 is sleeved on the screw 1011, and the two ends of the guide rod 10155 are respectively spaced through the first mounting plate 10153 and the second mounting plate 10154, and are respectively fixedly connected to the corresponding guide wheels 10156.

[0058] Optionally, the retaining frame assembly 180 includes two rotatably connected support frames, one of which is fixedly connected to the protective cover 160, and a front lens assembly 190 is provided at the end of the other support frame. The front lens assembly 190 includes two front lenses arranged at intervals.

[0059] This embodiment also provides a surgical microscope, including a handpiece 200 and the above-mentioned fundus mirror module 100. The handpiece 200 includes a main mirror body 210 and an objective lens 220. The fixed base plate 140 is installed on the bottom of the raised structure 211 of the main mirror body 210 through the mounting interface 143. The fundus lens main body module slides along the fixed base plate 140. When the surgical microscope is converted from the anterior segment mode to the posterior segment mode, the optical lens group and the objective lens 220 of the focusing lens group 130 are coaxial, and the linkage support mechanism simultaneously drives the focusing lens group 130 to move along the second direction, and the focusing lens group 130 moves to the working position to meet the required imaging effect; after the focusing lens group 130 moves to the initial working position, the relative position between the first lens structure 133 and the second lens structure 134 is adjusted by driving the focusing mechanism, thereby changing the distance between the first lens 1332 and the second lens 1342, thereby meeting the focusing requirements, flexible focusing, and meeting the flexibility of product use.

[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A fundus ophthalmoscope module, characterized in that: include: Fixed bottom plate (140); A fundus lens main body module comprises a focusing lens group (130) and a linkage support mechanism; A front lens module, the front lens module being fixedly connected to the fundus lens main body module via a retaining frame assembly (180); The fundus lens main body module is slidably connected to the fixed base plate (140) along a first direction; when the fundus lens main body module slides along the fixed base plate (140), the linkage support mechanism synchronously drives the focusing lens group (130) to move along a second direction; The linkage support mechanism comprises a linkage rod (121), the linkage rod (121) comprising two branch rods fixedly arranged at an angle and a connecting shaft (124), wherein one branch rod is transmission-connected to the focusing lens group (130) via a sleeve ring (122), a first limiting assembly is fixedly arranged at the end of the other branch rod, and a second limiting assembly corresponding to the first limiting assembly is provided on the fixed base plate (140); The second limiting component is a guide groove (141), and the guide groove (141) includes a straight groove portion (1411) and an arcuate groove portion (1412) that are connected to each other, the arcuate groove portion (1412) is arranged close to the focusing lens group (130), and the straight groove portion (1411) is arranged away from the focusing lens group (130), and the extension direction of the straight groove portion (1411) is parallel to the first direction; The first limiting component is accommodated in the guide groove (141) and is in rolling contact or sliding contact with the side wall of the guide groove (141).

2. The fundus ophthalmoscope module according to claim 1, characterized in that: The first limiting component is a roller (123); the roller (123) is received in the guide groove (141) of the fixed base plate (140) and is in rolling contact with the side wall of the guide groove (141).

3. The fundus ophthalmoscope module according to claim 1, characterized in that: The branch rod on which the first limiting assembly is installed is provided with an auxiliary tooth (1211), and the auxiliary tooth (1211) is provided with a guide structure (1212), and the guide structure (1212) is in rolling engagement with the guide groove (111) of the linkage support mechanism.

4. The fundus ophthalmoscope module according to claim 1, wherein: The sleeve ring (122) is provided with an oblique groove (1221), the focusing lens group (130) includes a protruding rod (131) matched with the oblique groove (1221), and one of the branch rods is rotatably matched with a connecting protrusion (1222) of the sleeve ring (122).

5. The fundus ophthalmoscope module according to claim 1, characterized in that: The linkage support mechanism includes two parallel slider groups, each of the slider groups includes at least two sliders (112) spaced apart, the sliders (112) are provided with dovetail slots, and the two opposite edges of the fixed base plate (140) are provided with guide rails (142), and the two guide rails (142) respectively correspond to and cooperate with the dovetail slots of the sliders (112) of the two slider groups.

6. The fundus ophthalmoscope module according to claim 1, characterized in that: The fundus mirror module further comprises a positioning structure, the positioning structure comprising a positioning groove and a positioning bead (151) that are mutually engaged, the positioning groove being arranged on the linkage support mechanism, the positioning bead (151) being arranged on the fixed base plate (140), or the positioning groove being arranged on the fixed base plate (140), and the positioning bead (151) being arranged on the linkage support mechanism.

7. The ophthalmoscope module according to any one of claims 1 to 6, characterized in that: The invention also comprises a protective cover (160), wherein the protective cover (160) is detachably sleeved on the bottom of the fundus lens main body module; the front lens module is fixedly connected to the fundus lens main body module via the retaining frame assembly (180), or the front lens module is fixedly connected to the protective cover (160) via the retaining frame assembly (180).

8. An operating microscope, characterized in that The invention comprises a handpiece (200) and an ophthalmoscope module as described in any one of claims 1 to 7, wherein the handpiece (200) comprises a main mirror body (210) and an objective lens (220), the fixed base plate (140) is mounted on the bottom of the main mirror body (210), the fundus lens main body module slides along the fixed base plate (140), and the linkage support mechanism simultaneously drives the focusing lens group (130) to move along a second direction, so that the optical lens group of the focusing lens group (130) and the objective lens (220) can be coaxial.

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