Fundus lens module and surgical microscope

Abstract

Disclosed in the present application are a fundus lens module and a surgical microscope. The fundus lens module comprises a fixed bottom plate (140), a fundus lens body module, and a front lens module (190). The fundus lens body module is slidably connected to the fixed bottom plate (140) in a first direction, and the front lens module (190) is fixedly connected to the fundus lens body module via a holder assembly (180). The fundus lens body module comprises a focusing lens set (130) and a linkage support mechanism, and when the fundus lens body module slides relative to the fixed bottom plate (140), the linkage support mechanism can synchronously drive the focusing lens set (130) to move in a second direction.

Description

ophthalmoscope module and surgical microscope

[0001] This application claims priority to Chinese Patent Application No. 202510369367.9, filed with the Chinese Patent Office on March 26, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of microscopy technology, such as ophthalmoscope modules and surgical microscopes. Background Technology

[0003] Optical observation devices, such as surgical microscopes, typically include a head section and an ophthalmoscope module. The head section includes the microscope's primary mirror body and objective lenses. The primary mirror body has a raised structure for optical coherence tomography (OCT). The objective lenses are mounted on the primary mirror body and located on one side of the OCT raised structure. The ophthalmoscope module is slidably mounted on the bottom of the OCT raised structure. Due to limitations and requirements in the optical path setup, the objective lenses and the OCT raised structure are at different heights, causing their bottoms to not be flush.

[0004] On the other hand, different manufacturers equip their own designed and manufactured fundus endoscope modules, which are only well-suited to their own ophthalmic surgical microscopes. However, there are still some cases, such as an ophthalmic surgical microscope from manufacturer A needing to be compatible with a fundus endoscope module from manufacturer B. Because the distance between the objective lens and the focusing assembly of the fundus endoscope module is a fixed initial value, the vertical position of the focusing lens assembly needs to be adjusted to adapt to the head structure of different manufacturers. Summary of the Invention

[0005] This application provides an ophthalmoscope module and a surgical microscope.

[0006] This application provides an ophthalmoscope module, including:

[0007] Fixed base plate;

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

[0009] A front-facing lens module, wherein the front-facing lens module is fixedly connected to the fundus lens main body module by a retainer assembly;

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

[0011] This application also provides a surgical microscope, including a head and an ophthalmoscope module. The head includes a main mirror body and an objective lens. The base plate of the ophthalmoscope module is mounted on the bottom of the main mirror body. When the ophthalmoscope module's fundus lens body module slides along the base plate, the linkage support mechanism of the fundus lens body module simultaneously drives the focusing lens group of the fundus lens body module to move in a second direction, so that the optical lens group of the focusing lens group and the objective lens can be coaxial. Attached Figure Description

[0012] Figure 1 is a schematic diagram of the state of a surgical microscope in anterior segment mode according to an embodiment of this application;

[0013] Figure 2 is a schematic diagram of the state of a surgical microscope in the posterior segment mode provided in an embodiment of this application;

[0014] Figure 3 is an exploded view of an ophthalmoscope module provided in an embodiment of this application;

[0015] Figure 4 is a schematic diagram of the assembly of a linkage support mechanism and a focusing lens group from a top-down perspective according to an embodiment of this application.

[0016] Figure 5 is an assembly diagram of the linkage support mechanism and focusing lens group from an elevation angle that is exactly the opposite of the top angle shown in Figure 4, according to an embodiment of this application.

[0017] Figure 6 is an assembly diagram of a driving focusing mechanism and a focusing lens group provided in an embodiment of this application;

[0018] Figure 7 is a magnified view of part A in Figure 6;

[0019] Figure 8 is a cross-sectional view of a focusing lens assembly provided in an embodiment of this application.

[0020] In the picture:

[0021] 100. Fundus lens module; 110. Top cover; 111. Guide groove; 112. Slider; 1121. Dovetail groove; 121. Linkage rod; 1211. Auxiliary tooth; 1212. Guide structure; 1213. Branch rod; 122. Connecting 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. Straight groove 1412, Arc-shaped groove; 142, Guide rail; 143, Mounting interface; 151, Positioning bead; 152, Positioning groove; 160, Protective sleeve; 170, Focusing lens assembly outer sleeve; 180, Cage assembly; 190, Front lens module; 1011, Lead screw; 1012, Lead screw nut; 1013, Manual focusing knob; 1014, Drive component; 10151, Drive wheel; 10152, Driven wheel; 10153, First mounting plate; 10154, Second mounting plate; 10155, Guide rod; 10156, Guide wheel; 1016, Transmission rod; 10161, Waist-shaped groove; 1017, Drive rod; 200, Head; 210, Primary lens body; 211, Protruding structure; 220, Objective lens. Detailed Implementation

[0022] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the meaning of the above terms in this application according to the circumstances.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0024] The ophthalmoscope module and surgical microscope provided in this application embodiment can simultaneously drive the focusing lens group to move along the second direction when the surgical microscope is switched from the anterior segment mode to the posterior segment mode, so that the focusing lens group moves to the working position and meets the required imaging effect.

[0025] As shown in Figures 1 to 5, this embodiment provides an ophthalmoscope module 100, which includes a fixed base plate 140, a fundus lens main module, and a front lens module 190. The fundus lens main module is slidably connected to the fixed base plate 140 along a first direction, and the front lens module 190 is fixedly connected to the fundus lens main module through a retainer assembly 180. The fundus lens main module includes a focusing lens group 130 and a linkage support mechanism. When the fundus lens main module slides relative to the fixed base plate 140, the linkage support mechanism can synchronously drive the focusing lens group 130 to move along a second direction. The second direction is not limited to the principal optical axis direction for observing the anterior and posterior segments of the eye in this embodiment, and is generally a vertical direction. If the patient is sitting or not lying down, this optical axis can be selected in 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 principal optical axis, and is generally a horizontal direction. Generally, the first direction refers to the horizontal direction, and the second direction refers to the vertical direction.

[0026] The aforementioned fundus lens module 100 is slidably connected to the fundus lens main module and the fixed base plate 140. When the fundus lens main module slides relative to the fixed base plate 140, the linkage support mechanism can synchronously drive the focusing lens group 130 to move along the second direction, so that the focusing lens group 130 moves to the working position to adapt to the structure of the camera head 200 of different manufacturers, thereby meeting the required imaging effect.

[0027] As shown in Figures 6-8, a focusing mechanism is provided on the linkage support mechanism. The focusing lens assembly 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. The second lens structure 134 is slidably connected to the linkage support mechanism. The 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, thereby driving the first lens structure 133 to move in a second direction.

[0028] By adjusting the relative displacement of the linkage support mechanism and the second lens structure 134, the focusing lens group 130 is moved along the second direction, so that the fundus lens module 100 can be adapted to the structure of the head 200 of different manufacturers. At the same time, rotating the lead screw 1011 causes the lead screw nut 1012 to drive the adjusting ring 132 to rotate. The adjusting ring 132 drives the first lens structure 133 to move along the second direction, so as 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 to meet the focusing requirements. The focusing is flexible, which meets the flexibility of product use.

[0029] Optionally, the linkage support mechanism includes a linkage rod 121, which includes two branch rods 1213 fixed at an included angle and a connecting shaft 124. One branch rod 1213 is connected to the focusing lens assembly 130 via a sleeve ring 122, and the end of the other branch rod 1213 is fixedly provided with a first limiting component. The fixed base plate 140 has a second limiting component corresponding to the first limiting component. When the fundus lens main module slides relative to the fixed base plate 140, the branch rod 1213 connected to the focusing lens assembly 130 drives the focusing lens assembly 130 to move in the second direction via the sleeve ring 122, so that the focusing lens assembly 130 moves to a suitable position.

[0030] Furthermore, the second limiting component is a guide groove 141, which includes a straight groove 1411 and an arc-shaped groove 1412 that are interconnected. The arc-shaped groove 1412 is located near the focusing lens group 130, while the straight groove 1411 is located away from the focusing lens group 130. The extension direction of the straight groove 1411 is parallel to the first direction. The straight groove 1411 is configured to switch between two working modes (anterior segment mode and posterior segment mode) of the fundus endoscope module 100 along the first direction, and the arc-shaped groove 1412 is configured to drive the focusing lens group 130 to move along the second direction via a linkage support mechanism. The dimensions of the straight groove 1411 and the arc-shaped groove 1412 can be adjusted based on the requirements of different surgical microscope optical systems to meet the distance adjustment relationship between the lower apex of the microscope objective lens 220 and the upper apex of the focusing lens group 130 of the fundus endoscope module 100.

[0031] In related embodiments, the first limiting component is received in the guide groove 141 and rolls or slides against the side wall of the guide groove 141. For example, the first limiting component can be configured as a roller 123, which is received in the guide groove 141 of the fixed base plate 140 and rolls against the side wall of the guide groove 141, making the movement of the first limiting component within the second limiting component smoother. Alternatively, for example, the first limiting component can also be configured as a limiting rod, which is received in the guide groove 141 of the fixed base plate 140 and slides against the side wall of the guide groove 141. Under the constraint of the guide groove 141, the limiting rod drives the end of its corresponding branch rod 1213 to move.

[0032] Optionally, the connecting ring 122 is provided with a groove 1221, and the focusing lens assembly 130 includes a protruding rod 131 that cooperates with the groove 1221. The branch rod 1213, which is drivenly connected to the focusing lens assembly 130, is drivenly connected to the focusing lens assembly (130) by rotating with the connecting protrusion 1222 of the connecting 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 peripheral surface of the outer sleeve 1341. Further, the outer sleeve 1341 includes a concave structure at the bottom, which is configured to support the adjusting ring 132 and accommodate the adjusting ring 132 to rotate inside it. The inner end of the concave structure is fixedly connected to the second lens 1342.

[0033] Furthermore, the connecting protrusion 1222 includes a groove, and the end of the branch rod 1213, which is driven to the focusing lens assembly 130 via the sleeve ring 122, has a protruding rod that mates with the groove of the connecting protrusion 1222 to drive the connecting protrusion 1222 to rotate. In some embodiments, the branch rod 1213, which is driven to the focusing lens assembly 130 via the sleeve ring 122, may have a groove structure to accommodate the end of the connecting protrusion 1222, thereby defining one end of the connecting protrusion 1222 and realizing a corresponding driving relationship.

[0034] The fundus lens module 100 also includes a protective sleeve 160, which is fitted onto the focusing lens assembly 130 and detachably connected to the fundus lens main module. This arrangement facilitates the installation and removal of the protective sleeve 160. In this embodiment, the protective sleeve 160 is configured as a disinfection protective sleeve, used for disinfecting and maintaining the fundus lens main module. Optionally, the linkage support mechanism also includes a focusing lens assembly outer sleeve 170, which protects and supports the focusing lens assembly 130. The protective sleeve 160 is also fitted onto the focusing lens assembly outer sleeve 170 and detachably connected to it, thus facilitating installation and removal.

[0035] Preferably, the branch rod 1213, on which the first limiting component is installed, has an auxiliary tooth 1211 protruding from it. The auxiliary tooth 1211 is fitted with a guide structure 1212, and a guide groove 111 is provided on the linkage support mechanism. The guide structure 1212 rolls into the guide groove 111. When the first limiting component moves along the arc-shaped groove 1412 of the guide groove 141, the guide structure 1212 can assist in guiding the first limiting component, thereby improving the movement stability of the branch rod 1213. Optionally, the guide structure 1212 can be a ball bearing or a guide rod.

[0036] In some embodiments, a protective sleeve is also provided, which is detachably fitted onto the bottom of the fundus lens main body module; the front lens module is fixedly connected to the fundus lens main body module by a retainer assembly, or the front lens module is fixedly connected to the protective sleeve by a retainer assembly.

[0037] In conjunction with the above embodiments or the embodiments below, the linkage support mechanism further includes a detachable and fixed upper cover 110, the fundus lens main module can be slidably connected to the fixed base plate 140 through the upper cover 110, the guide groove 111 can be provided on the upper cover 110, and the connecting shaft 124 can be fixedly connected to the upper cover 110.

[0038] During the production process, only the dimensions of the guide groove 141 of the fixed base plate 140 need to be adjusted to apply the solution of this application to the main body of surgical microscopes from different manufacturers, so as to meet the configuration of the distance between the lower vertex of the microscope objective lens and the upper vertex of the fundus lens optical group for different optical systems of each product. Correspondingly, the guide groove 111 of the upper cover 110 on the linkage support mechanism also needs to be configured accordingly. In summary, the product configuration requirements of most manufacturers can be met by adjusting the production of two simple components. These components are all detachable and can be produced in conjunction with mainstream product models. Users can select different models of these optional components according to their needs to meet the configuration requirements of different models of equipment.

[0039] Furthermore, to improve the operational stability of the linkage 121, the connection point of the two branch rods 1213 can be rotatably connected to other structures of the linkage support mechanism via the connecting shaft 124.

[0040] The linkage support mechanism also includes two parallel slider groups. Each slider group includes at least two sliders 112 spaced apart. The sliders 112 are provided with dovetail grooves 1121. The two opposite edges of the fixed base plate 140 parallel to the first direction are provided with guide rails 142. The two guide rails 142 and the dovetail grooves 1121 of the sliders 112 of the two slider groups are respectively matched to ensure that the sliding between the linkage support mechanism and the fixed base plate 140 is stable and reliable.

[0041] Preferably, the ophthalmoscope module 100 further includes a positioning structure, which includes a positioning groove 152 and a positioning bead 151 that engage with each other. For example, the positioning groove 152 is located in the linkage support mechanism, and the positioning bead 151 is located in the fixed base plate 140. Alternatively, for example, the positioning groove 152 is located in the fixed base plate 140, and the positioning bead 151 is located in the linkage support mechanism. The above-described positioning structure can satisfy the positioning limitations of the ophthalmoscope module 100 in two operating modes (anterior segment mode and posterior segment mode).

[0042] Optionally, the lead screw nut 1012 driving the focusing mechanism is provided with a rotatable transmission rod 1016. The transmission rod 1016 is provided with an oblong groove 10161 along the second direction. A drive rod 1017 is slidably connected within the oblong groove 10161, and the drive rod 1017 is fixedly connected to the adjusting ring 132. The oblong groove 10161 is arranged along the second direction so that the drive rod 1017 will not interfere with the movement of the focusing lens assembly 130 in the second direction. The drive rod 1017 can rotate under the drive of the transmission rod 1016, so that the drive rod 1017 can drive the adjusting ring 132 to rotate, thereby causing the adjusting ring 132 to drive the first lens structure 133 to move along the second direction.

[0043] The adjusting ring 132 is provided with an oblique hole. The first lens structure 133 includes a rod structure 1333 that mates 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 along the second direction. The limiting structure effectively prevents the first lens structure 133 from rotating, allowing it to move only along the second direction, thus improving the reliability of adjustment. Optionally, the limiting structure is set as a vertical groove 13411 extending along the second direction. Referring to Figure 8, the first lens structure 133 includes an inner sleeve 1331 and a first lens 1332 installed in the inner sleeve 1331. The first lens 1332 and the second lens 1342 are coaxially arranged along the second direction, and the rod structure 1333 is fixed to the inner sleeve 1331.

[0044] In one embodiment, both ends of the lead screw 1011 are provided with manual focusing knobs 1013 to facilitate manual turning operations and improve the comfort of turning.

[0045] Alternatively, in another embodiment, the driving focusing mechanism further includes a driving member 1014. The lead screw 1011 and the output shaft of the driving member 1014 are connected via a gear assembly. The driving member 1014 includes an electric focusing button. This configuration enables electric focusing operation. Specifically, the gear assembly includes a driving wheel 10151 mounted on the output shaft, two driven wheels 10152 spaced apart from the lead screw 1011 and 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 spaced apart and sleeved on the output shaft and the lead screw 1011, 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 meshes with both the driving wheel 10151 and one of the driven wheels 10152. The other guide wheel 10156 is rotatably mounted on the second mounting plate 10154 and meshes with the other driven wheel 10152. The second mounting plate 10154 is sleeved on the lead screw 1011. 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 wheel 10156.

[0046] Optionally, the retainer assembly 180 includes two rotatably connected support frames, one of which is fixedly connected to the protective sleeve 160, and the other support frame is provided with a front lens module 190 at its end, the front lens module 190 including two spaced-apart front lenses.

[0047] This embodiment also provides a surgical microscope, including a head unit 200 and the aforementioned fundus endoscope module 100. The head unit 200 includes a main mirror body 210 and an objective lens 220. A fixed base plate 140 is mounted on the bottom of the protruding structure 211 of the main mirror body 210 via a mounting interface 143. The fundus lens main module slides relative to the fixed base plate 140 along a first direction, allowing the surgical microscope to switch from anterior segment mode to posterior segment mode. The optical lens group 130 and the objective lens 220 are coaxial, and during mode switching, a linkage support mechanism simultaneously drives the focusing lens group 130 to move along a second direction, moving it to its initial working position to achieve the desired imaging effect. After the focusing lens group 130 reaches its 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 to meet focusing requirements. This flexible focusing mechanism enhances the product's usability.

Claims

1. An ophthalmoscope module, comprising: Fixed base plate (140); The main module of the fundus lens includes a focusing lens group (130) and a linkage support mechanism; A front-facing lens module (190) is fixedly connected to the fundus lens main body module via a retainer assembly (180); The fundus lens main module is slidably connected to the fixed base plate (140) along the first direction; when the fundus lens main module slides relative to the fixed base plate (140), the linkage support mechanism can synchronously drive the focusing lens group (130) to move along the second direction.

2. The ophthalmoscope module according to claim 1, wherein, The linkage support mechanism includes a linkage rod (121), which includes two branch rods (1213) fixed at an included angle and a connecting shaft (124). One branch rod (1213) is connected to the focusing lens group (130) via a sleeve ring (122). The end of the other branch rod (1213) is fixedly provided with a first limiting component. The fixed base plate (140) has a second limiting component corresponding to the first limiting component.

3. The ophthalmoscope module according to claim 2, wherein, The second limiting component is a guide groove (141), which includes a straight groove (1411) and an arc groove (1412) that are connected to each other. The arc groove (1412) is located close to the focusing lens group (130), and the straight groove (1411) is located away from the focusing lens group (130). The extension direction of the straight groove (1411) is parallel to the first direction.

4. The ophthalmoscope module according to claim 3, wherein, 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 rolls in contact with the side wall of the guide groove (141).

5. The fundus camera module according to claim 2, wherein, The branch rod (1213) on which the first limiting component is installed has an auxiliary tooth (1211) protruding. The auxiliary tooth (1211) is equipped with a guide structure (1212), and the guide structure (1212) rolls into contact with the guide groove (111) of the linkage support mechanism.

6. The fundus camera module according to claim 2, wherein, The sleeve ring (122) is provided with a slanted groove (1221), and the focusing lens assembly (130) includes a protruding rod (131) that cooperates with the slanted groove (1221). The branch rod (1213) that is drivenly connected to the focusing lens assembly (130) is drivenly connected to the focusing lens assembly (130) by rotating with the connecting protrusion (1222) of the sleeve ring (122).

7. The ophthalmoscope module according to claim 1, wherein, The linkage support mechanism includes two parallel slider groups, each slider group including at least two spaced sliders (112), each slider (112) being provided with a dovetail groove (1121), and each of the two opposite edges of the fixed base plate (140) parallel to the first direction being provided with a guide rail (142), the two guide rails (142) corresponding to and cooperating with the dovetail grooves (1121) of the sliders (112) of the two parallel slider groups.

8. The ophthalmoscope module according to claim 1 further includes a positioning structure, the positioning structure comprising a positioning groove (152) and a positioning bead (151) that are interlocked, wherein: The positioning groove (152) is provided in the linkage support mechanism, and the positioning bead (151) is provided in the fixed base plate (140); or The positioning groove (152) is provided on the fixed base plate (140), and the positioning bead (151) is provided on the linkage support mechanism.

9. The fundus camera module according to any one of claims 1-8 further includes a protective sleeve (160), the protective sleeve being detachably fitted onto the bottom of the fundus camera main body module; the front lens module (190) is fixedly connected to the fundus camera main body module via the retainer assembly (180), or the front lens module (190) is fixedly connected to the protective sleeve (160) via the retainer assembly (180).

10. A surgical microscope, comprising a head (200) and an ophthalmoscope module according to any one of claims 1-9, wherein the head (200) comprises a primary mirror body (210) and an objective lens (220), and a fixed base plate (140) of the ophthalmoscope module is mounted on the bottom of the primary mirror body (210). When the ophthalmoscope module's fundus lens body module slides relative to the fixed base plate (140) along a first direction, the linkage support mechanism of the fundus lens body module can simultaneously drive the focusing lens group (130) of the fundus lens body module 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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