Ophthalmic surgical instrument

Abstract

The utility model relates to the technical field of surgical instruments, in particular to an ophthalmologic surgical instrument. The ophthalmic surgical instrument comprises an operation main body, an operation handle and a locking piece, the operation body is provided with a limiting groove. The operating handle is movably connected to the operating main body and comprises a cutting part and a pressure applying part which are oppositely arranged; the locking piece is rotationally connected to the operating handle, the rotating axis of the locking piece is arranged in the first direction, and the locking piece is arranged between the cutting part and the pressure applying part; when the pressure applying part is stressed, the operation handle can move relative to the operation body, the locking piece moves to the position opposite to the limiting groove, then the locking piece can be screwed into the limiting groove, and the operation handle is locked. According to the capsulotomy needle, the problem that in the prior art, operation is tedious when a doctor uses the capsulotomy needle can be solved, the operation handle is rapidly locked and unlocked by controlling the locking piece, the operation steps are simplified, and the operation difficulty of the doctor on instruments is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical instruments, in particular to an ophthalmic surgical instrument. Background Art

[0002] The existing cataract surgery firstly cuts the cornea (such as Figure 9 Make an incision of about 2-3 mm (as shown in H in the figure), and then insert forceps to remove the anterior capsule of the cataract lens (as shown in Figure 9 Tear it off and use the handle of ultrasonic emulsification to remove the cloudy lens (as shown in J in the figure). Figure 9 The cataract is removed by crushing the intraocular lens and sucking it out, leaving a posterior capsule bag. Finally, this incision is used to place the folded intraocular lens into the capsule bag, flatten it, and remove excess impurities by suction, thus completing the cataract surgery.

[0003] Existing cataract surgical instruments typically use a capsulotomy needle to incise the anterior capsule, completing the initial step of cataract surgery. The capsulotomy needle consists of a syringe, a push rod, and a cutting head. The push rod is movably connected to the syringe, and the cutting head is connected to one end of the push rod. During use, the surgeon pushes the other end of the push rod to push the cutting head out of the syringe, allowing the surgery to be performed.

[0004] However, in the above-mentioned operation method, the doctor needs to keep pressing the push rod to keep the cutting knife in position, which makes the operation more inconvenient. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the present utility model is to provide an ophthalmic surgical instrument to solve the problem of inconvenient operation of the capsule cutting needle in the prior art.

[0006] The ophthalmic surgical instrument provided by the embodiment of the utility model includes:

[0007] An operating body, which is provided with a limiting groove;

[0008] An operating handle movably connected to the operating body in a first direction, the operating handle comprising a cutting portion and a pressing portion arranged opposite to each other in the first direction;

[0009] a locking member rotatably connected to the operating handle, wherein the rotation axis of the locking member is arranged along the first direction, and the locking member is installed between the cutting portion and the pressing portion;

[0010] When the pressure portion is subjected to force, the operating handle can move relative to the operating body, so that the locking member can move to a position opposite to the limiting groove, and then the locking member can be screwed into the limiting groove, and the operating handle is locked.

[0011] In one embodiment, a accommodating groove is provided on the side of the operating body facing away from the cutting portion, and the operating handle is slidably connected to the accommodating groove. The groove wall of the accommodating groove is penetrated by the limiting groove and a guide groove connected to the limiting groove. The guide groove extends in the first direction, and the limiting groove is located on one side in the width direction of the guide groove; the locking member is passed through the guide groove.

[0012] In one embodiment, the operating handle further includes an inserting portion, the inserting portion is located between the pressure-applying portion and the cutting portion, and the inserting portion includes a fixed shaft and chucks located on both sides of the fixed shaft;

[0013] The locking member includes a rotating part, and a slot is provided on the side of the rotating part facing the fixed shaft. The slot is adapted to the fixed slot, and the outer contour of the chuck is larger than the inner contour of the slot, so that the rotating part is clamped between the two chucks.

[0014] In one embodiment, two limiting grooves are provided, the two limiting grooves are spaced apart in the first direction, and the two limiting grooves are respectively located on the same side or opposite sides in the width direction of the guide groove.

[0015] In one embodiment, the locking member further includes a toggle portion, which includes a connecting rod and a toggle button. One end of the connecting rod is connected to the rotating portion, and the other end is passed through the guide groove and connected to the toggle button. The toggle button is located outside the operating body.

[0016] In one embodiment, the slot wall of the slot extends along the circumference of the fixed shaft.

[0017] In one embodiment, one of a guide groove and a guide block is provided on the groove wall of the accommodating groove, and the other of the guide groove and the guide block is provided on the operating handle, and the guide block is slidably arranged in the guide groove in the direction of the groove opening of the accommodating groove.

[0018] In one embodiment, the operating handle further comprises a blocking portion, wherein the blocking portion is located between the cutting portion and the pressing portion;

[0019] The ophthalmic surgical instrument further includes an elastic element, which is sandwiched between the bottom of the accommodating groove and the blocking portion.

[0020] In one embodiment, the ophthalmic surgical instrument further includes two damping rings, which are mounted on the operating main rod and are respectively located on both sides of the plug-in portion, and the outer side surfaces of the damping rings are against the groove wall of the accommodating groove.

[0021] In one embodiment, a through opening is provided at the bottom of the accommodating groove; the operating body is provided with a tube body connected to the through opening, the tube body includes a front end portion away from the operating body, the cutting part is movably provided in the tube body, the cutting part can pass through the front end portion, and the cutting part is made of elastic material so that the cutting part can be unfolded into a ring shape when passing through the front end portion.

[0022] Compared with the prior art, the beneficial effect of the ophthalmic surgical instrument provided by the embodiment of the present invention is that the ophthalmic surgical instrument of the present application can lock the operating handle through a locking member to simplify the operating steps and is more efficient and convenient to use.

[0023] Specifically, the doctor can apply pressure to the pressure-applying portion to drive the cutting portion to move in the first direction to the working position. When locking is required, the doctor can rotate the locking member to engage the limiting slot, which restricts the movement of the locking member in the first direction, thereby locking the operating handle and maintaining the cutting portion in the desired position. Furthermore, when unlocking is required, the doctor simply disengages the locking member from the limiting slot to reset the operating handle. Compared to prior art embodiments in which the doctor must continuously press the push rod to maintain the position of the cutting blade, this ophthalmic surgical instrument is simple to operate, saves time and effort, and reduces operational difficulty, thereby effectively improving surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of an ophthalmic surgical instrument provided by an embodiment of the present utility model;

[0026] Figure 2 This is a schematic cross-sectional view of an ophthalmic surgical instrument provided by an embodiment of the present utility model;

[0027] Figure 3 This is a partial schematic diagram of the unlocking of the locking member when the cutting portion is retracted, provided by an embodiment of the present utility model;

[0028] Figure 4 This is a partial schematic diagram of the locking member in the state where the cutting portion is retracted, provided by an embodiment of the present utility model;

[0029] Figure 5 This is a partial schematic diagram of the locking member unlocked when the cutting portion is extended, provided by an embodiment of the present invention;

[0030] Figure 6 This is a partial schematic diagram of the locking member in the state where the cutting portion is extended, provided by an embodiment of the present utility model;

[0031] Figure 7A schematic diagram of the combination of a locking member, an operating handle, and a damping ring provided in an embodiment of the present utility model;

[0032] Figure 8 A schematic diagram of the disassembly of the locking member and the operating handle provided in an embodiment of the present utility model;

[0033] Figure 9 This is a diagram of the eye structure.

[0034] The reference numerals in the figures are:

[0035] 1000. Ophthalmic surgical instruments;

[0036] 10. Operating body; 11. Limiting groove; 12. Accommodating groove; 121. Through port; 13. Guide groove; 14. Tube; 141. Front end; 15. Lug;

[0037] 20. Operating handle; 21. Cutting portion; 211. First arc segment; 212. Second arc segment; 22. Pressing portion; 23. Connecting portion; 231. Fixed shaft; 232. Chuck; 24. Guide block; 25. Blocking portion;

[0038] 30. Locking member; 31. Rotating portion; 311. Slot; 311a. Arc-shaped surface; 32. Driving portion; 321. Connecting rod; 322. Driving button;

[0039] 40. Elastic element;

[0040] 50. Damping ring. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, a detailed description of the preferred embodiments of the present utility model will be given.

[0042] The present invention provides an ophthalmic surgical instrument 1000, which is used for making anterior capsule incision in cataract surgery. Figure 1 and Figure 2 As shown, the ophthalmic surgical instrument 1000 includes an operating body 10, an operating handle 20 and a locking member 30; the operating body 10 is provided with a limiting groove 11; the operating handle 20 is in a first direction (such as Figure 1The operating body 10 is movably connected to the operating handle 20 (as shown in the X direction in FIG). The operating handle 20 includes a cutting portion 21 and a pressure portion 22 arranged opposite to each other in a first direction. A locking member 30 is rotatably connected to the operating handle 20. The rotation axis of the locking member 30 is arranged along the first direction, and the locking member 30 is installed between the cutting portion 21 and the pressure portion 22. When the pressure portion 22 is subjected to force, the operating handle 20 can move relative to the operating body 10, and the locking member 30 moves to a position opposite to the limiting groove 11, thereby allowing the locking member 30 to be screwed into the limiting groove 11, and the operating handle 20 is locked. The present application can solve the problem of cumbersome operation of doctors using capsule cutting needles in the prior art. By manipulating the locking member 30, the operating handle 20 can be quickly locked and unlocked, simplifying the operation and reducing the difficulty of the doctor's operation of the instrument.

[0043] Specifically, the doctor can apply pressure to the pressure-applying portion 22 to drive the cutting portion 21 to move in the first direction to the working position. When locking is required, the locking member 30 can be rotated to engage with the limiting groove 11. The limiting groove 11 can limit the movement of the locking member 30 in the first direction, thereby locking the operating handle 20 and keeping the cutting portion 21 in the required position. At the same time, when unlocking is required, the operating handle 20 can be reset by simply disengaging the locking member 30 from the limiting groove 11. Compared with the embodiment of the prior art in which the doctor needs to press the push rod to maintain the position of the cutting knife, the ophthalmic surgical instrument 1000 is simple to operate, saves time and effort, reduces the difficulty of operation, and thus effectively improves the efficiency of the operation.

[0044] There are various ways to connect the operating handle 20 to the operating body 10. In one embodiment, the operating body 10 includes two side surfaces (not shown) arranged opposite each other in a first direction and an end surface (not shown) connected to the two side surfaces. The end surface is provided with a sliding groove (not shown) that extends in both directions in the first direction to penetrate the two side surfaces. The operating handle 20 is slidably connected to the sliding groove. The limiting groove 11 is provided on the end surface and is located on one side of the sliding groove in the width direction. The limiting groove 11 penetrates the groove wall of the sliding groove. When the locking member 30 slides to a position opposite to the limiting groove 11, the portion of the locking member 30 exposed outside the end surface can be screwed into the limiting groove 11 to achieve locking.

[0045] Reference Figures 2 to 6In another embodiment, a receiving groove 12 is provided on the side of the operating body 10 facing away from the cutting portion 21. The operating handle 20 is slidably connected to the receiving groove 12. The groove wall of the receiving groove 12 is provided with a limiting groove 11 and a guide groove 13 connected to the limiting groove 11. The guide groove 13 extends in a first direction, and the limiting groove 11 is located on one side of the guide groove 13 in the width direction. The locking member 30 is inserted into the guide groove 13 and can be engaged with the limiting groove 11. Specifically, the locking member 30 includes a rotating portion 31 and a toggle portion 32. The rotating portion 31 is located in the receiving groove 12 and is rotatably connected to the operating handle 20. The toggle portion 32 is inserted into the guide groove 13 and can be engaged with the limiting groove 11. With this arrangement, the guide groove 13 can guide and limit the movement of the locking member 30 along a predetermined path, allowing the locking member 30 to better align with the limiting groove 11, facilitating quick engagement between the two, and improving the stability of locking and unlocking. Moreover, since the guide groove 13 and the limiting groove 11 extend to the outside of the operating body 10, the toggle portion 32 and the limiting groove 11 are exposed to the outside, and the doctor can more intuitively observe the matching process of the locking member 30 and the limiting groove 11, thereby ensuring the accuracy of locking and unlocking.

[0046] Furthermore, the toggle portion 32 includes a connecting rod 321 and a toggle button 322. One end of the connecting rod 321 is connected to the rotating portion 31, and the other end is passed through the guide groove 13 and connected to the toggle button 322. The toggle button 322 is located outside the operating body 10. In this way, the provision of the toggle button 322 allows the doctor to more conveniently operate the connecting rod 321 to realize the function of the locking member 30.

[0047] Preferably, an anti-slip groove is further provided on the side of the dial button 322 facing away from the connecting rod 321 to increase the contact area, increase the friction force, and avoid slipping during operation.

[0048] Reference Figure 1 In one embodiment, two lugs 15 are further provided on the exterior of the operating body 10, symmetrically disposed on either side of the operating body 10. This arrangement facilitates one-handed operation of the ophthalmic surgical instrument 1000 by the surgeon. Specifically, the surgeon can engage the lugs 15 with two fingers and push the operating handle 20 with his thumb to achieve control.

[0049] Reference Figure 7 and Figure 8In one embodiment, the operating handle 20 further includes an inserting portion 23, which is located between the pressure-applying portion 22 and the cutting portion 21. The inserting portion 23 includes a fixed shaft 231 and chucks 232 located on either side of the fixed shaft 231. A slot 311 is provided on the side of the rotating portion 31 facing the fixed shaft 231, which mates with the fixed slot 231. The outer contour of the chuck 232 is larger than the inner contour of the slot 311, thereby clamping the rotating portion 31 between the two chucks 232. This arrangement restricts movement of the slot 311 in the first direction, allowing the operating handle 20 to move with the locking member 30 and maintain its relative position, preventing it from shifting, thereby improving the stability and reliability of the connection. Furthermore, because the slot 311 is restricted by the fixed shaft 231, it can only rotate along the axial direction of the fixed shaft 231, maintaining stable rotation. This facilitates accurate alignment of the locking member 30 with the limiting slot 11, reducing jamming.

[0050] In one embodiment, the inserting portion 23 , the pressing portion 22 , and the cutting portion 21 are integrally formed to facilitate installation.

[0051] Reference Figure 8 In one embodiment, the slot 311 has a wall extending along the circumference of the fixed shaft 231. This arrangement provides a better fit between the slot 311 and the fixed shaft 231, further enhancing stability during rotation. Specifically, the fixed shaft 231 is cylindrical, and the slot 311 has a wall formed as an arcuate surface 311a.

[0052] Reference Figure 3 and Figure 6 In one embodiment, two limiting grooves 11 are provided. The two limiting grooves 11 are spaced apart in the first direction and are located on the same side or opposite sides of the guide groove 13 in the width direction. This increases the number of locking positions of the cutting portion 21 in the first direction, providing the physician with more locking options, allowing the physician to adjust the position according to specific needs. For example, the two limiting grooves 11 are provided at both ends of the guide groove 13 and are located on opposite sides of the guide groove 13 in the width direction.

[0053] To better illustrate the advantages of implementing this embodiment, a specific usage scenario is provided below. In this application, the doctor applies force to the pressure-applying portion 22 to extend or retract the cutting portion 21 into the operating body 10. The limiting groove 11 near the cutting portion 21 is used to lock the cutting portion 21 in the extended state, and the limiting groove 11 away from the cutting portion 21 is used to lock the cutting portion 21 in the retracted state, thereby facilitating the doctor's more efficient operation during surgery.

[0054] Reference Figure 7In one embodiment, the wall of the receiving groove 12 is provided with either a guide groove (not shown) or a guide block 24. The operating handle 20 is provided with the other of the guide groove and the guide block 24. The guide block 24 slides within the guide groove in the direction of the notch of the receiving groove 12. The guide groove and the guide block 24 cooperate to prevent the operating handle 20 from rotating relative to the operating body 10. This design makes the ophthalmic surgical instrument 1000 safer to use because rotation would change the relative position of the cutting portion 21 and the area to be cut, posing a risk.

[0055] In addition, the guide groove and the guide block 24 cooperate to provide guidance for the moving path of the operating handle 20, reducing movement resistance so that the force can be accurately transmitted to the cutting part 21, thereby improving the accuracy and efficiency of cutting.

[0056] Reference Figure 2 In one embodiment, the operating handle 20 further includes a blocking portion 25 located between the cutting portion 21 and the pressure-applying portion 22. The ophthalmic surgical instrument 1000 further includes an elastic element 40 interposed between the bottom of the receiving groove 12 and the blocking portion 25. This configuration allows the elastic element 40 to induce the operating handle 20 to move away from the groove bottom. When the handle is locked, the elastic element 40 is compressed and stores energy. After unlocking, the elastic element 40 releases this energy and generates an elastic force that drives the operating handle 20 back to its original position. This allows the operating handle 20 to automatically return to its original position after unlocking, improving operational efficiency and convenience. Specifically, the elastic element 40 may be a spring.

[0057] Reference Figure 2 and Figure 7 In one embodiment, the ophthalmic surgical instrument 1000 further includes two damping rings 50 mounted on the operating handle 20 and located on either side of the inserting portion 23. The outer surfaces of the damping rings 50 abut against the walls of the accommodating groove 12. This arrangement improves the fit between the operating handle 20 and the operating body 10 and reduces shaking. Furthermore, the presence of two damping rings 50, one on either side of the inserting portion 23 in the first direction, ensures a more balanced force on the inserting portion 23, thereby ensuring the stability of the locking and unlocking functions.

[0058] Specifically, the damping ring 50 is clamped between the blocking portion 25 and the plug-in portion 23 to limit the movement of the damping ring 50 and ensure that the damping ring 50 can always maintain a relative position, which is conducive to its full play and thus improves the stability and operating accuracy of the ophthalmic surgical instrument 1000.

[0059] It is understandable that the number of damping rings 50 in the above solution can also be adjusted according to actual design requirements and is not limited here.

[0060] It is worth mentioning that, by implementing this embodiment, the damping ring 50 can also generate a certain damping force when the elastic element 40 releases energy, ensuring that the resetting process of the operating handle 20 is smooth and controlled, avoiding operational inconvenience caused by too fast or too slow speed.

[0061] Reference Figure 2 In one embodiment, the bottom of the receiving groove 12 is provided with a through-hole 121; the operating body 10 is provided with a tube body 14 connected to the through-hole 121. The tube body 14 includes a front end 141 remote from the operating body 10. The cutting portion 21 is movably disposed within the tube body 14 and can pass through the front end 141. The cutting portion 21 is made of an elastic material so that the cutting portion 21 can expand into a ring shape when passing through the front end 141. The tube body 14 can form an incision in the cornea and extend into the anterior capsule. The pressure-applying portion 22 controls the cutting portion 21 to extend out of the front end 141, allowing the cutting portion 21 to expand into a ring shape. The ring-shaped cutting portion 21 acts on the location to be cut on the anterior capsule of the lens, quickly cutting the location to form an ideal incision, facilitating the doctor's subsequent treatment steps. And because the cutting portion 21 is made of elastic material, by controlling the cutting portion 21 to retract into the tube body 14, the cutting portion 21 can be reset and retracted from the expanded state, making it easier for the tube body 14 to be removed from the incision in the cornea. It can be seen that this design enables the ophthalmic surgical instrument 1000 to reduce the doctor's operating difficulty and increase the removal speed during cataract surgery, thereby improving work efficiency, reducing operation time and risks, and thus improving the quality of cataract surgery. In addition, this ophthalmic surgical instrument 1000 can also maintain the relative consistency and accuracy of the incision in each operation, realize the standardization of the anterior capsule of the lens, and the standardized interception method can maintain the relative integrity of the lens capsule bag, which is beneficial to the subsequent implantation and positioning of the artificial lens, thereby greatly improving the success rate of the operation.

[0062] It is worth mentioning that the cutting portion 21 leaves an annular incision after cutting the anterior capsule, which not only facilitates the phacoemulsification handle to extend into the capsular bag to break up and aspirate the cloudy lens, but also facilitates the implantation of the intraocular lens into the capsular bag.

[0063] Furthermore, because the cutting portion 21 is made of an elastic material, it can be retracted into the tubular body 14, allowing the cutting portion 21 to transition from an extended state to a retracted state. This means that the corneal incision does not need to be cut excessively to meet the extended size of the cutting portion 21, but only needs to meet the size of the tubular body 14, making the surgery safer and more effective.

[0064] Further, refer to Figure 1In one embodiment, the cutting portion 21 is integrally formed with the operating handle 20. The cutting portion 21 includes a first arc segment 211 and a second arc segment 212. One end of the first arc segment 211 is connected to the operating handle 20. The second arc segment 212 is symmetrically arranged with the first arc segment 211 to define a ring structure together with the first arc segment 211. One end of the second arc segment 212 is connected to one end of the first arc segment 211 connected to the operating handle 20 and the operating handle 20, and the other end is connected to the other end of the first arc segment 211. The operating handle 20 and the cutting portion 21 are integrally formed, making manufacturing simpler and more convenient; the first arc segment 211 and the second arc segment 212 are both elastic. When they are in the tube body 14, the tube body 14 limits the tendency of the first arc segment 211 and the second arc segment 212 to expand and bend outward, so that the first arc segment 211 and the second arc segment 212 store energy, and after the cutting portion 21 extends out of the front end portion 141, the first arc segment 211 and the second arc segment 212 quickly release energy and expand to form an annular structure; the annular structure acts on the anterior capsule so that the anterior capsule can stably form an annular incision. It can be seen that the ophthalmic surgical instrument 1000 has better stability and reliability.

[0065] In this embodiment, the symmetrical arrangement of the second arc segment 212 and the first arc segment 211 ensures uniform force upon retraction, maintaining the specific shape of the annular structure during energy release and maintaining stability in use. Furthermore, the first arc segment 211, the second arc segment 212, and the facing ends of the operating handle 20 are all interconnected, providing greater connection strength and making more efficient use of the anterior capsule incision.

[0066] Specifically, the connecting portion, the first arcuate segment 211, and the second arcuate segment 212 are all in the shape of a circular tube, which has an arcuate surface. The arcuate surface can reduce the contact area with the tube body 14, reduce the generation of friction, and facilitate the movement of the cutting member within the tube body 14. The annular structure defined by the second arcuate segment 212 and the first arcuate segment 211 can have various shapes. For example, in the present application, the annular structure is circular. The circular incision can largely maintain the relative integrity of the anterior capsule, facilitating the implantation and positioning of the intraocular lens in the capsular bag.

[0067] It should be noted that the annular structure can be a closed annular structure or a non-closed annular structure. Those skilled in the art can flexibly adjust the incision according to needs, and this is not limited here.

[0068] In the present application, the cross-sections of the second arc segment 212 and the first arc segment 211 may be in various shapes, such as circular, triangular or other irregular shapes. For example, in the present embodiment, the cross-sections of the second arc segment 212 and the first arc segment 211 are rectangular.

[0069] In one embodiment, the tube body 14 is made of soft material. The soft tube body 14 can arbitrarily change the direction of the front end portion 141 and maintain the adjusted position, thereby making it easier for the doctor to insert the tube body 14 into the anterior capsule for surgery.

[0070] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or replace some of the technical features therein with equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An ophthalmic surgical instrument, characterized in that: include: An operating body, which is provided with a limiting groove; An operating handle movably connected to the operating body in a first direction, the operating handle comprising a cutting portion and a pressing portion arranged opposite to each other in the first direction; a locking member rotatably connected to the operating handle, wherein the rotation axis of the locking member is arranged along the first direction, and the locking member is installed between the cutting portion and the pressing portion; When the pressure portion is subjected to force, the operating handle can move relative to the operating body, so that the locking member can move to a position opposite to the limiting groove, and then the locking member can be screwed into the limiting groove, and the operating handle is locked.

2. The ophthalmic surgical instrument according to claim 1, characterized in that: A accommodating groove is provided on the side of the operating body facing away from the cutting part, and the operating handle is slidably connected to the accommodating groove. The groove wall of the accommodating groove is penetrated by the limiting groove and a guide groove connected to the limiting groove. The guide groove extends in the first direction, and the limiting groove is located on one side in the width direction of the guide groove; the locking member is passed through the guide groove.

3. The ophthalmic surgical instrument according to claim 2, characterized in that: The operating handle further includes an inserting portion, the inserting portion is located between the pressure-applying portion and the cutting portion, and the inserting portion includes a fixed shaft and chucks located on both sides of the fixed shaft; The locking member includes a rotating part, and a slot is provided on the side of the rotating part facing the fixed shaft. The slot is adapted to the fixed shaft, and the outer contour of the chuck is larger than the inner contour of the slot so that the rotating part is clamped between the two chucks.

4. The ophthalmic surgical instrument according to claim 3, characterized in that: There are two limiting grooves, which are spaced apart in the first direction and are located on the same side or opposite sides in the width direction of the guide groove.

5. The ophthalmic surgical instrument according to claim 3, characterized in that: The locking member further includes a toggle portion, which includes a connecting rod and a toggle button. One end of the connecting rod is connected to the rotating portion, and the other end is passed through the guide groove and connected to the toggle button. The toggle button is located outside the operating body.

6. The ophthalmic surgical instrument according to claim 3, characterized in that: The slot wall of the slot is extended along the circumference of the fixed shaft.

7. The ophthalmic surgical instrument according to claim 3, characterized in that: One of the guide groove and the guide block is provided on the groove wall of the accommodating groove, and the other of the guide groove and the guide block is provided on the operating handle. The guide block is slidably arranged in the guide groove in the direction of the notch of the accommodating groove.

8. The ophthalmic surgical instrument according to any one of claims 3 to 7, characterized in that: The operating handle further includes a blocking portion, wherein the blocking portion is located between the cutting portion and the pressure applying portion; The ophthalmic surgical instrument further includes an elastic element, which is sandwiched between the bottom of the accommodating groove and the blocking portion.

9. The ophthalmic surgical instrument according to claim 8, characterized in that: The ophthalmic surgical instrument further comprises two damping rings, which are sleeved on the operating handle and respectively located on both sides of the plug-in portion, and the outer side surfaces of the damping rings are against the groove wall of the accommodating groove.

10. The ophthalmic surgical instrument according to any one of claims 2 to 7, characterized in that: The bottom of the accommodating groove is penetrated by a through opening; the operating body is provided with a tube body connected to the through opening, the tube body includes a front end portion away from the operating body, the cutting part is movably arranged in the tube body, the cutting part can pass through the front end portion, and the cutting part is made of elastic material so that the cutting part can be unfolded into a ring shape when passing through the front end portion.

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