Axial length compensation device

Abstract

The present invention provides an axial length compensation device, which relates to the technical field of medical machinery, and includes a suspension mechanism and a wide-angle auxiliary lens system. The suspension mechanism includes a connecting rod and a first compensation member, one end of the connecting rod is fixedly connected to the first compensation member, and the other end is rotatably connected to the accessory mounting platform of the surgical microscope; the wide-angle auxiliary lens system includes a lens mounting member, a lens assembly, an auxiliary connecting member, a rotating assembly, and a second compensation member. The lens assembly is fixedly arranged on the lens mounting member, one end of the auxiliary connecting member is rotatably connected to the lens mounting member through the rotating assembly, and the other end is fixedly connected to the second compensation member, the second compensation member is slidably connected to the first compensation member, and the central axis of the lens assembly is parallel to the second compensation member. The present invention allows doctors to accurately adjust the axial length of different patients by introducing an axial length compensation knob and a locking device with a highly quantitative adjustment function, thereby improving applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an axial length compensation device. Background Art

[0002] In fundus surgery, a wide-angle auxiliary lens system is a commonly used device used to provide clear fundus images while maintaining a certain working distance. Existing wide-angle auxiliary lens systems usually include a focusing mirror suspended under a surgical microscope, which adjusts its distance from the surgical microscope objective lens through a mechanical structure to match the patient's axial length and the imaging position of the fundus. However, the main limitation of this system is that the focusing range of the focusing mirror is limited, especially when the patient has abnormal refractive state (such as high myopia or hyperopia), gas-liquid exchange is performed, or fundus protrusions need to be observed during fundus surgery. The focusing mirror often cannot provide sufficient adjustment range to adapt to these changes, resulting in the inability to obtain clear fundus images, affecting the accuracy and efficiency of the surgery.

[0003] Based on the above-mentioned shortcomings of the prior art, an axial length compensation device is urgently needed. Summary of the invention

[0004] The purpose of the present invention is to provide an eye axis length compensation device to improve the above problem. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] The present application provides an axial length compensation device, characterized in that it includes: a suspension mechanism and a wide-angle auxiliary lens system, the suspension mechanism includes a connecting rod and a first compensation member, one end of the connecting rod is fixedly connected to the first compensation member, and the other end is rotatably connected to the accessory mounting platform of the surgical microscope; the wide-angle auxiliary lens system includes a lens mounting member, a lens assembly, an auxiliary connecting member, a rotating assembly and a second compensation member, the lens assembly is fixedly arranged on the lens mounting member, one end of the auxiliary connecting member is rotatably connected to the lens mounting member through the rotating assembly, and the other end is fixedly connected to the second compensation member, the second compensation member is slidably connected to the first compensation member, and the central axis of the lens assembly and the second compensation member are parallel to each other.

[0006] Furthermore, the second compensating member is provided with a sliding portion and an adjusting device, and the first compensating member is provided with a sliding groove and a locking device that match the sliding portion.

[0007] Furthermore, the sliding portion includes a coaxially arranged flat sliding area and a column area, the adjusting device includes a screw segment and a compensation knob, one end of the flat sliding area is fixedly connected to the auxiliary lens arm, and the other end is fixedly connected to the column area, one end of the column area away from the flat sliding area is fixedly connected to the screw segment, the compensation knob is provided with a screw hole that cooperates with the screw segment, and the compensation knob is rotatably connected to the screw segment.

[0008] Further, the first compensation member includes a sliding mounting seat, which is fixedly connected to the connecting rod, and is provided with a first sliding groove and a second sliding groove that are connected to each other, the width of the first sliding groove is greater than the diameter of the column area, the width of the second sliding groove is less than the width of the first sliding groove and greater than the minimum width portion of the flat sliding area, and a through hole that cooperates with the column area is provided on the inner side of the second sliding groove.

[0009] Furthermore, the locking device includes a fixed base plate, a spring and an elastic locking pin which are fixedly connected in sequence, a countersunk surface cooperating with the fixed base plate is provided on the inner side of the second slide groove, the fixed base plate is fixedly arranged in the countersunk surface, the elastic locking pin includes a cylinder and a pressure plate arranged at the bottom of the cylinder, a blind hole cooperating with the cylinder is arranged on the sliding mounting seat, and the elastic locking pin is arranged in the blind hole.

[0010] Furthermore, the sliding part also includes a direction positioning block, which is fixedly arranged between the screw segment and the column area, one end of the direction positioning block coincides with the circular cross-section of the column area, and the other end is rectangular and protrudes outward along the diameter direction of the column area.

[0011] Furthermore, an alignment mark is provided on the end surface parallel to the sliding mounting seat in the direction positioning, and a compensation value mark corresponding to the alignment mark is provided on the sliding mounting seat.

[0012] Furthermore, the lens mounting member comprises a cantilever and a lens mounting ring fixedly arranged at both ends of the cantilever, and the lens assembly is fixedly arranged in the lens mounting ring.

[0013] Furthermore, the rotating assembly includes a flange bearing and a rivet, a first through hole cooperating with the flange bearing is opened at the center of the cantilever, a second through hole cooperating with the rivet is opened at the center of the auxiliary connecting piece, the flange bearing is arranged in the first through hole of the cantilever, the rivet is arranged in the second through hole, the fixed part of the flange bearing is fixedly connected to the cantilever, and the rotating part of the flange bearing is fixedly connected to the rivet.

[0014] Furthermore, the rotating assembly also includes two spring balls, a first blind hole for accommodating the spring ball is opened on the outer side of the first through hole, a second blind hole cooperating with the spring ball is opened on the end surface of the auxiliary connecting part close to the cantilever, and the spring ball is arranged in the first blind hole.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides an additional compensation mechanism for the wide-angle auxiliary lens system by introducing an axial length compensation knob and a locking device with a highly quantitative adjustment function, allowing doctors to accurately adjust the axial lengths of different patients, thereby improving applicability; by providing a sliding mount and a direction positioning block, the stability and correct orientation of the lens during surgery are ensured, thereby providing the surgeon with a clearer and more stable field of view.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the eye axis length compensation device described in the embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the suspension mechanism structure described in the embodiment of the present application;

[0021] Figure 3 Schematic diagram of the structure of the wide-angle auxiliary lens system described in the embodiment of the present application;

[0022] Figure 4 An exploded diagram of the wide-angle auxiliary lens system described in an embodiment of the present application;

[0023] Figure 5 for Figure 1 The enlarged view at I in the middle;

[0024] Figure 6 Schematic diagram of the structure of the locking device described in the embodiment of the present application.

[0025] Markings in the figure: 1. suspension mechanism; 11. connecting rod; 12. first compensation part; 121. locking device; 1211. fixed base plate; 1212. spring; 1213. elastic locking pin; 122. sliding mounting seat; 1221. first slide groove; 1222. second slide groove; 1223. compensation value mark; 2. wide-angle auxiliary lens system; 21. lens mounting part; 211. cantilever; 212. lens mounting ring; 22. lens assembly; 23. auxiliary connecting part; 24. rotating assembly; 241. flange bearing; 242. rivet; 243. spring ball; 25. second compensation part; 251. sliding part; 2511. flat sliding area; 2512. column area; 2514. direction positioning block; 2515. alignment mark; 252. adjustment device; 2521. screw rod section; 2522. compensation knob. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] like Figure 1As shown, this embodiment provides an axial length compensation device, including a suspension mechanism 1 and a wide-angle auxiliary lens system 2. The core function of the suspension mechanism 1 is to provide a stable and flexible support structure so that the wide-angle auxiliary lens can make necessary position adjustments to adapt to different surgical needs. The suspension mechanism 1 includes a connecting rod 11 and a first compensation member 12, one end of the connecting rod 11 is fixedly connected to the first compensation member 12, and the other end is rotatably connected to the accessory mounting platform of the surgical microscope. This rotating connection design enables the entire device to be flexibly adjusted during surgery to adapt to the needs of different angles and positions, thereby ensuring that the lens system can be aligned with the patient's eyes. The wide-angle auxiliary lens system 2 is the core visual component of the device. The wide-angle auxiliary lens system 2 includes a lens mounting member 21, a lens assembly 22, an auxiliary connecting member 23, a rotating assembly 24, and a second compensation member 25. The lens assembly 22 is fixedly arranged on the lens mounting member 21. The design of the auxiliary connecting member 23 allows one end thereof to be rotatably connected to the lens mounting member 21 through the rotating assembly 24, and different lenses can be used alternately according to surgical needs by rotation. The other end is fixedly connected to the second compensation member 25. The second compensating member 25 is slidably connected to the first compensating member 12, and the central axis of the lens assembly 22 is parallel to the second compensating member 25. The sliding connection design provides further adjustment flexibility for the lens assembly 22. Through the interaction between the first compensating member 12 and the second compensating member 25, the device can accurately adjust the position of the lens to match the axial length of the patient's eye, thereby providing a clearer field of view for fundus surgery. The design of the rotating connection and the sliding connection increases the operational flexibility during the operation, allowing the doctor to adjust the lens position according to the needs of the operation and optimize the surgical field of view. The parallel design of the central axis of the lens assembly 22 and the second compensating member 25 ensures the consistency of the optical axis of the lens and the patient's eye axis, which is crucial to achieving high-quality fundus imaging.

[0029] Preferably, if Figure 1 and Figure 3As shown, the second compensating member 25 is provided with a sliding portion 251 and an adjusting device 252. The second compensating member 25 is provided with a sliding portion 251, which allows the lens component to move smoothly along a specific trajectory to achieve detailed position adjustment. In addition, the adjusting device 252 allows the operator to accurately control the movement degree and position of the sliding portion 251 to adapt to the specific changes in the patient's eye axis. The first compensating member 12 is designed with a slide groove that matches the sliding portion 251, which provides a certain path for the sliding portion 251, ensuring the linearity and accuracy of its movement. The locking device 121 is used to fix the sliding portion 251 in an appropriate position, which is particularly important during the operation because it can prevent position deviation caused by accidental touch or other external factors, ensuring the accuracy and safety of the operation. These optimized designs enable the eye axis length compensation device to not only provide the required adjustment function, but also ensure the accuracy and safety of the entire surgical process, significantly improving the medical effect and the patient's treatment experience.

[0030] Preferably, if Figure 2 and Figure 3 As shown, the sliding portion 251 includes a coaxially arranged flat slide-in area 2511 and a column area 2512, and the adjustment device includes a screw segment 2521 and a compensation knob 2522. One end of the flat slide-in area 2511 is fixedly connected to the auxiliary lens arm, and the other end is fixedly connected to the column area 2512. One end of the column area 2512 away from the flat slide-in area 2511 is fixedly connected to the screw segment 2513, and the compensation knob 2522 is provided with a screw hole that matches the screw segment 2521, and the compensation knob 2522 is rotatably connected to the screw segment 2521. Furthermore, the second compensation member 25 includes a sliding mounting seat 122, which is fixedly connected to the connecting rod 11, and is provided with a first sliding groove 1221 and a second sliding groove 1222 which are connected to each other. The width of the first sliding groove 1221 is greater than the diameter of the column area 2512, and the width of the second sliding groove 1222 is less than the width of the first sliding groove 1221 and greater than the minimum width portion on the flat sliding area 2511. A through hole cooperating with the column area 2512 is provided on the inner side of the second sliding groove 1222.

[0031] It should be noted that the flat slide-in area 2511 is located at the bottom area of ​​the sliding part 251, and its width is specially designed to match the second slide groove 1222 of the suspension mechanism 1. This design ensures that the special-shaped main arm can be smoothly installed and removed through the opening of the suspension mechanism 1, providing basic installation support. The flat slide-in area 2511 is connected to the column area 2512, and the column area 2512 provides structural stability and rigidity, so that the sliding part 251 can withstand various forces in surgical operations. The other end of the column area 2512 is fixedly connected to the screw segment 2521, and the screw segment 2521 is used in conjunction with the compensation knob 2522. The compensation knob 2522 is provided with a screw hole, which is threadedly connected to the screw segment 2521, so that when the compensation knob 2522 is rotated, the sliding part 251 can move accurately in a straight line along the screw segment 2521. This design allows doctors to make fine adjustments by rotating the compensation knob 2522 during surgery to achieve accurate compensation of the axial length of the eye. The coaxially arranged flat slide-in area 2511 and column area 2512 ensure the stable movement of the sliding part 251 in the slide groove, prevent rotation and deviation, and provide higher operational stability.

[0032] Preferably, if Figure 6As shown, the locking device 121 includes a fixed base plate 1211, a spring 1212 and an elastic locking pin 1213 which are fixedly connected in sequence, a sunken surface which cooperates with the fixed base plate 1211 is provided on the inner side of the second slide groove 1222, the fixed base plate 1211 is fixedly arranged in the sunken surface, the elastic locking pin 1213 includes a cylinder and a pressing plate arranged at the bottom of the cylinder, a blind hole which cooperates with the cylinder is arranged on the sliding mounting seat 122, and the elastic locking pin 1213 is arranged in the blind hole. The fixed base plate 1211 is the basic part of the locking device 121, preferably, it is fixed on the suspension mechanism 1 or the sliding mounting seat 122 by welding. The fixed base plate 1211 provides a stable platform for installing other components of the locking mechanism. The spring 1212 is connected to the fixed base plate 1211, and its main purpose is to provide the necessary pressure and reset force for the elastic locking pin 1213. In this way, the spring 1212 not only supports the dynamic movement of the locking pin, but also ensures that the locking pin can automatically return to the original position when there is no external force. The elastic locking pin 1213 is the core of the locking device 121, which includes a cylinder and a pressure plate arranged at the bottom of the cylinder. The cylinder is designed to be able to slide into or out of the blind hole that cooperates with it, and the pressure plate is used to realize the locking function. When the locking pin is pressed into the blind hole, the pressure plate contacts the countersunk surface or other locking surface of the optical column, thereby fixing the entire device. Through the combined use of the fixed base plate 1211 and the countersunk surface, and the cooperation of the elastic locking pin 1213 with the blind hole, this locking device 121 effectively fixes the special-shaped main arm or other key components in a specific operating position, preventing movement caused by vibration or excessive operating force. In addition, the locking device 121 allows the operator to quickly and accurately lock or unlock the component when needed, which is particularly important for the operation of medical equipment that requires frequent adjustments.

[0033] Preferably, if Figure 1 and Figure 4 As shown, the sliding part 251 also includes a direction positioning block 2514, which is fixedly arranged between the screw section 2521 and the column area 2512. One end of the direction positioning block 2514 coincides with the circular cross-section of the column area 2512, which helps to ensure its alignment inside the device. The other end is rectangular and protrudes outward along the diameter direction of the column area 2512. This design provides additional mechanical support to ensure that the direction positioning block 2514 maintains the correct direction during movement and prevents rotation or deviation. The main function of the direction positioning block 2514 is to ensure the directional stability of the sliding part 251 during the adjustment process. The raised rectangular end limits the rotation or lateral movement of the component through physical contact, thereby maintaining the set path and orientation. The addition of the direction positioning block 2514 enhances the stability of the device and the accuracy of operation.

[0034] Preferably, if Figure 5As shown, an alignment mark 2515 is provided on the end surface of the direction positioning block 2514 parallel to the sliding mounting seat 122, and a compensation value mark 1223 corresponding to the alignment mark 2515 is provided on the sliding mounting seat 122. The length of the screw segment 2521 and the thickness of the direction positioning block 2514 jointly determine the adjustment stroke of the axial length compensation device. The compensation value mark 1223 provides an intuitive reference for doctors to adjust the device to a specific compensation position. The mark usually includes the center position, the upward 1 / 2 stroke and the downward 1 / 2 stroke, which are pre-set according to the stroke limit of the structure. Further, corresponding to wide-angle auxiliary lenses with different parameters, the axial length compensation values ​​corresponding to the positions of the compensation value marks 1223 are different, but for wide-angle compensation lenses with fixed parameters, the axial length compensation values ​​corresponding to each scale position are unique. Preferably, a corresponding axial length compensation value comparison table can be provided for the doctor's reference according to the configured wide-angle auxiliary lens parameters.

[0035] Preferably, if Figure 4 As shown, the lens mounting member 21 includes a cantilever 211 and lens mounting rings 212 fixedly disposed at both ends of the cantilever 211 , and the lens assembly 22 is fixedly disposed in the lens mounting ring 212 .

[0036] Preferably, if Figure 4As shown, the rotating assembly 24 includes a flange bearing 241, a rivet 242 and two spring balls 243. A first through hole matching with the flange bearing 241 is provided at the center of the cantilever 211, and a first blind hole accommodating the spring balls 243 is provided outside the through hole. A second blind hole matching with the spring balls 243 is provided on the end surface of the auxiliary connecting member 23 close to the cantilever 211, and a second through hole matching with the rivet 242 is provided at the center of the auxiliary connecting member 23. The flange bearing 241 is arranged in the first through hole of the cantilever 211, the rivet 242 is arranged in the second through hole, and the spring balls 243 are arranged in the first blind hole. The fixed part of the flange bearing 241 is fixedly connected to the cantilever 211, and the rotating part of the flange bearing 241 is fixedly connected to the rivet 242. The cantilever 211 is designed to support different lenses at both ends. By rotating the cantilever 211, it is possible to switch between two different types of lenses. This design is particularly suitable for occasions where it is necessary to quickly change the observation method or imaging technology during surgery. The flange bearing 241 is installed in the through hole at the center of the cantilever 211, and cooperates with the rivet 242 to ensure stability during rotation. This structural design enables the cantilever 211 to bear the weight of the lens without losing stability, while maintaining smooth rotation. The key function of the spring ball 243 is to quickly and accurately lock the lens when the cantilever 211 rotates to a specific position (such as 180 degrees). This is achieved by presetting the spring ball 243 in the blind hole of the cantilever 211. When the cantilever 211 rotates to the corresponding position, the spring ball 243 is compressed and quickly expands into the corresponding blind hole on the auxiliary connecting piece 23, thereby achieving locking. Through the combination of the spring ball 243 and the flange bearing 241, the cantilever 211 can be quickly and accurately locked when it is rotated to the desired position, ensuring the stability of the lens during use and avoiding field of view deviation or vibration during surgery. At the same time, such a design takes into account the smoothness of operation and physical feedback, ensuring that the doctor can feel the exact locking of the lens position during surgery.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0038] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An axial length compensation device, characterized in that: include: A suspension mechanism (1), the suspension mechanism (1) comprising a connecting rod (11) and a first compensation member (12), one end of the connecting rod (11) being fixedly connected to the first compensation member (12), and the other end of the connecting rod (11) being rotatably connected to an accessory mounting platform of a surgical microscope; and A wide-angle auxiliary lens system (2), the wide-angle auxiliary lens system (2) comprising a lens mounting member (21), a lens assembly (22), an auxiliary connecting member (23), a rotating assembly (24) and a second compensation member (25), the lens assembly (22) being fixedly arranged on the lens mounting member (21), one end of the auxiliary connecting member (23) being rotatably connected to the lens mounting member (21) via the rotating assembly (24), and the other end of the auxiliary connecting member (23) being fixedly connected to the second compensation member (25), the second compensation member (25) being slidably connected to the first compensation member (12), and the central axis of the lens assembly (22) and the second compensation member (25) being parallel to each other; The second compensating member (25) is provided with a sliding portion (251) and an adjusting device (252), and the first compensating member (12) is provided with a sliding groove and a locking device (121) that match the sliding portion (251); Wherein, the sliding portion (251) comprises a coaxially arranged flat sliding-in area (2511) and a column area (2512), the adjusting device (252) comprises a screw segment (2521) and a compensation knob (2522), one end of the flat sliding-in area (2511) is fixedly connected to the auxiliary connecting member (23), and the other end is fixedly connected to the column area (2512), one end of the column area (2512) away from the flat sliding-in area (2511) is fixedly connected to the screw segment (2521), the compensation knob (2522) is provided with a screw hole matched with the screw segment (2521), and the compensation knob (2522) is rotatably connected to the screw segment (2521); Wherein, the first compensation member (12) includes a sliding mounting seat (122), the sliding mounting seat (122) is fixedly connected to the connecting rod (11), and a first sliding groove (1221) and a second sliding groove (1222) which are connected to each other are provided on the sliding mounting seat (122), the width of the first sliding groove (1221) is greater than the diameter of the column area (2512), the width of the second sliding groove (1222) is less than the width of the first sliding groove (1221), and is greater than the minimum width portion on the flat sliding-in area (2511), and a through hole cooperating with the column area (2512) is provided on the inner side of the second sliding groove (1222).

2. The eye axis length compensation device according to claim 1, characterized in that: The locking device (121) comprises a fixed base plate (1211), a spring (1212) and an elastic locking pin (1213) which are fixedly connected in sequence; a sunken surface cooperating with the fixed base plate (1211) is provided on the inner side of the second slide groove (1222); the fixed base plate (1211) is fixedly arranged in the sunken surface; the elastic locking pin (1213) comprises a cylinder and a pressure plate arranged at the bottom of the cylinder; a blind hole cooperating with the cylinder is arranged on the sliding mounting seat (122); and the elastic locking pin (1213) is arranged in the blind hole.

3. The eye axis length compensation device according to claim 1, characterized in that: The sliding portion (251) further comprises a direction positioning block (2514), wherein the direction positioning block (2514) is fixedly arranged between the screw rod segment (2521) and the columnar region (2512), wherein one end of the direction positioning block (2514) coincides with the circular cross section of the columnar region (2512), and the other end is in a rectangular shape and protrudes outwardly along the diameter direction of the columnar region (2512).

4. The eye axis length compensation device according to claim 3, characterized in that: The direction positioning block (2514) is provided with an alignment mark (2515), and the sliding mounting seat (122) is provided with a compensation value mark (1223) corresponding to the alignment mark (2515).

5. The eye axis length compensation device according to any one of claims 1 to 3, characterized in that: The lens mounting member (21) comprises a cantilever (211) and a lens mounting ring (212) fixedly arranged at both ends of the cantilever (211); the lens assembly (22) is fixedly arranged in the lens mounting ring (212).

6. The eye axis length compensation device according to claim 5, characterized in that: The rotating assembly (24) comprises a flange bearing (241) and a rivet (242); a first through hole cooperating with the flange bearing (241) is provided at the center of the cantilever (211); a second through hole cooperating with the rivet (242) is provided at the center of the auxiliary connecting piece (23); the flange bearing (241) is arranged in the first through hole of the cantilever (211); the rivet (242) is arranged in the second through hole; the fixed part of the flange bearing (241) is fixedly connected to the cantilever (211); and the rotating part of the flange bearing (241) is fixedly connected to the rivet (242).

7. The eye axis length compensation device according to claim 6, characterized in that: The rotating assembly (24) further comprises two spring balls (243); a first blind hole for accommodating the spring balls (243) is provided on the outer side of the first through hole; a second blind hole for cooperating with the spring balls (243) is provided on the end surface of the auxiliary connecting member (23) close to the cantilever (211); and the spring balls (243) are arranged in the first blind hole.

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