Ophthalmic capsulorhexis forceps and use method

Abstract

The invention discloses an ophthalmic capsulotomy forceps and a use method, belonging to the technical field of capsulotomy forceps, comprising: a hand-held grip and a pull line, wherein the bottom end of the hand-held grip is fixedly connected with a mounting tube, the interior of the mounting tube is hollow, a driving assembly is arranged inside the mounting tube, the outer end of the hand-held grip is rotatably connected with two kneading pieces, the bottom end of the mounting tube is fixedly connected with a mounting block, a relatively small guide tube is connected to the bottom of the mounting block, the end of the guide tube is in a bent state, and a capsulotomy assembly is arranged, the capsulotomy assembly mainly drives the capsulotomy forceps heads on both sides to move by the up and down movement of a driving block 2, so that only the guide tube enters the cornea of ​​the eye, and the driving block 2 is driven by the pull line to make the two capsulotomy forceps heads move and clamp, so that when the two capsulotomy forceps heads are moving and clamping, the guide tube will not shake at the incision of the cornea of ​​the eye, so that it is not easy to cause damage to the incision of the cornea when the clamping or releasing action is performed.

Description

Technical Field

[0001] The invention relates to the technical field of capsulotomy forceps, and more particularly to an ophthalmic capsulotomy forceps and a use method thereof. Background Art

[0002] Capsulotomy forceps is a common endoscopic surgical instrument, mainly used for tissue sampling, biopsy or resection during endoscopic examination or surgery. It is an instrument specifically used in ophthalmic surgery and is usually used in cataract surgery. In cataract surgery, the doctor needs to remove the cloudy lens (cataract) in the patient's eye through surgery and implant an artificial lens in its place. Capsulotomy forceps enable the doctor to accurately enter the eyeball and tear open the lens capsule, gradually tearing and removing the cloudy lens tissue. This process is crucial to ensure the success of the operation and the patient's vision recovery.

[0003] The Chinese patent publication number CN219127029U discloses a capsulotomy forceps with adjustable claw length, wherein the capsulotomy forceps body is symmetrically arranged, and an anti-slip pad is fixedly installed on the outer wall of the capsulotomy forceps body, and a buffer capsule is symmetrically fixedly installed on the inner wall of the capsulotomy forceps body on the side close to the capsulotomy forceps body, and a fixed forceps leg is fixedly installed on the bottom of the capsulotomy forceps body, and a telescopic groove is fixedly installed on the bottom of the fixed forceps leg, and a connecting telescopic frame is movably sleeved inside the telescopic groove, and an arc-shaped claw is fixedly installed on the end of the connecting telescopic frame away from the telescopic groove, and the extended length of the arc-shaped claw is adjusted by tightening the bolt, so that the adjustment operation can be performed according to the pupil size and the thickness and size of the capsule membrane of different patients. Further, the extended length of the arc-shaped claw can be flexibly adjusted according to the specific situation of the patient, thereby improving the adaptability and precision of the operation, further improving the medical level, and reducing the pain of the patient.

[0004] During cataract surgery, an artificial lens needs to be placed in the human eye. There is a capsule in front of the lens in the eye, so the capsule needs to be torn open during cataract surgery. However, traditional capsulotomy forceps are connected to the end handle, and the front end of the forceps is inserted into the corneal incision to tear off the capsule. The incision on the cornea is usually small, and the forceps tip is connected to the forceps handle. This causes the forceps tip to move at the corneal incision every time it is closed or opened, which can easily damage the cornea.

[0005] At the same time, since tearing off the capsule membrane in the capsular bag requires surgical operation under a microscope, the technique is required to be high. Slight shaking can easily cause irreversible damage to the eye. When tearing off the capsule membrane, it is necessary to clamp the capsule membrane and tear it into a circle in the middle. Therefore, not only do you need to keep pinching the capsule membrane with the tweezers, you also need to make a tearing action. Long-term operation can easily cause fatigue to the doctor, which is not conducive to improving safety.

[0006] Therefore, it is necessary to provide an ophthalmic capsulorhexis forceps and a method of use to solve the above problems. Summary of the invention

[0007] The present invention provides an ophthalmic capsulotomy forceps and a method for using the same, which can improve the related art in which the conventional capsulotomy forceps are connected to a handle at the end, and the capsule is torn off after the forceps tip at the front end is inserted into a corneal incision. The incision on the cornea is usually small, and the forceps tip is connected to the forceps handle, which makes the forceps tip move at the corneal incision each time it is closed or opened, thereby easily causing damage to the cornea.

[0008] In a first aspect, an embodiment of the present application provides an ophthalmic capsulotomy forceps, comprising: a hand-held gripping rod and a pull wire, wherein the bottom end of the hand-held gripping rod is fixedly connected to a mounting tube, the interior of the mounting tube is hollow, a driving assembly is arranged inside the mounting tube, the outer end of the hand-held gripping rod is rotatably connected to two kneading pieces, the bottom end of the mounting tube is fixedly connected to a mounting block, a channel connected to the mounting tube is arranged inside the mounting block, a guide tube is fixedly connected to the bottom end of the guide tube, a capsulotomy assembly is arranged at the end of the guide tube, and a fixed The assembly comprises a limit assembly at the outer end of the mounting tube, the pull wire is made of aramid fiber material, the capsulotomy assembly comprises two symmetrically arranged capsulotomy forceps heads and a driving block 2, the two capsulotomy forceps heads are driven by the driving block 2 to move in opposite directions, the outer edges of the two capsulotomy forceps heads are fixedly connected with forceps head clips, the outer edges of the forceps head clips are arranged in an arc shape, the guide tube is arranged in a hollow shape, the guide tube is connected with the inside of the mounting tube through the mounting block, the upper half of the guide tube is in a vertical state, and the lower half of the guide tube is arranged in a curved shape.

[0009] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0010] (1) A relatively small guide tube is connected to the bottom of the mounting block. The end of the guide tube is in a bent state and is equipped with a capsulorhexis assembly. The capsulorhexis assembly mainly drives the capsulorhexis forceps heads on both sides to move by moving the driving block 2 up and down, so that only the guide tube enters the cornea of ​​the eye. The driving block 2 is driven by a pull wire to move and clamp the two capsulorhexis forceps heads. When the two capsulorhexis forceps heads are moving and clamping, the guide tube will not shake at the incision of the cornea of ​​the eye, so that it is not easy to cause damage to the incision of the cornea when clamping or releasing.

[0011] (2) A limit rod is fixed at the bottom end of the driving block 1. By engaging the limit block on the grip ring with the limit groove 2, the driving block 1 can be fixed and will not move up and down. By slightly rotating the limit button up and down, the connecting rod can drive the grip ring to move. When the capsule membrane is clamped, the driving block 1 can be fixed by the limit rod, so that the driving block 2 cannot be reset. At this time, the doctor no longer needs to distract his attention to pinch the pinching piece, so that the capsulorhexis forceps head can maintain the clamping action, reducing the burden of the doctor's long-term operation.

[0012] (3) A tweezers clip is provided at the outer edge of the capsulotomy forceps head. The outer edge of the tweezers clip is arc-shaped and the whole body is flat. The tip of the conventional tweezers is sharp and it is easy to poke other parts of the eye with a slight mistake. When the capsulotomy forceps drive the tweezers clip to clamp the capsule and slide over other parts of the eye, it is not easy to cause damage, thereby improving the safety of use.

[0013] In some embodiments, the driving assembly includes a driving block 1, which is located inside the mounting tube. Two symmetrically distributed slide grooves are provided at the outer end of the mounting tube. Both ends of the driving block 1 respectively pass through the two slide grooves. Both ends of the driving block 1 are fixedly connected with movable blocks, and the movable blocks are in contact with the outer surface of the mounting tube.

[0014] In some embodiments, the driving assembly also includes two movable connecting rods, and the two movable connecting rods are rotatably installed on the outer ends of the kneading pieces. The outer ends of the two movable blocks are fixedly connected with connecting blocks. The movable connecting rod is rotatably connected to the connecting block at one end away from the kneading piece, and the top of the driving block is fixedly connected with a telescopic spring. The end of the telescopic spring away from the driving block is connected to the top of the mounting tube. The kneading piece drives the movable connecting rod to move upward by rotating, and the driving block is reset by the telescopic spring.

[0015] In some embodiments, the limit assembly includes a limit button, and a reset groove and a limit groove 1 are respectively provided at the outer end of the limit button, the outer end of the limit button is rotatably connected to a fixing rod, and the fixing rod is fixedly installed on the outer end of the mounting tube, and the limit button is rotated by using the rotation connection with the fixing rod as a fulcrum, the outer end of the limit button is rotatably connected to a connecting rod, and the connecting rod is rotatably connected to a movable rod at one end away from the limit button.

[0016] In some embodiments, the limit assembly also includes a limit rod, the movable rod is away from one end of the connecting rod and penetrates the side wall of the mounting tube and extends to the interior, and one end of the movable rod is fixedly connected to a grip ring, the limit rod is fixedly installed at a bottom end of the driving block, the inner side of the grip ring is fixedly connected to the limit block, the outer periphery of the limit rod is surrounded by a plurality of limit grooves 2 that are equidistantly distributed, the limit grooves 2 are adapted to the limit blocks, the grip ring is adapted to the limit rod, the grip ring is clamped in the limit groove 2 by the limit block to limit the limit rod, and the bottom end of the limit rod is connected to one end of the pull wire.

[0017] In some embodiments, the capsular tearing assembly also includes a sleeve and a fixed shaft, the sleeve is fixedly connected to one end of the guide tube away from the mounting block, the pull wire passes through the mounting block and the guide tube in sequence and extends to the inside of the sleeve, the inner wall of the sleeve is fixedly connected to a partition, the top end of the fixed shaft passes through the partition, the outer end of the fixed shaft is fixedly connected to a mounting plate, and a reset spring is provided in the outer sleeve of the fixed shaft, the two ends of the reset spring are respectively connected to the mounting plate and the partition, and the drive block 2 is reset by the action of the reset spring.

[0018] In some embodiments, the bottom end of the fixed shaft is fixedly connected to the driving block 2, and the driving block 2 is provided with inclined plane 2 on both sides, and the two capsulotomy forceps heads are provided with inclined plane 1 matched with inclined plane 2 on the side close to each other, and the inclined plane 1 and inclined plane 2 are in contact with each other, and the driving block 2 is located between the two capsulotomy forceps heads.

[0019] In some embodiments, the outer ends of the two capsulotomy forceps heads are fixedly connected with slider 1, the inner wall of the sleeve is provided with two movable grooves matched with slider 1, the capsulotomy forceps heads are slidably connected with the movable grooves through slider 1, the outer end of the inclined surface 1 is fixedly connected with slider 2, the outer ends of the inclined surfaces 2 on both sides of the driving block 2 are provided with driving grooves matched with slider 2, the slider 2 is slidably connected with the driving groove, and the driving block 2 drives slider 2 through the driving groove, thereby driving the capsulotomy forceps heads to move.

[0020] In some embodiments, the fixing component includes a fixed base plate, the bottom end of the fixed base plate is fixedly connected to the fixed shaft, the top of the fixed base plate is fixedly connected to a threaded block, the top of the threaded block is fixedly connected to a plurality of clamping blocks distributed in a ring shape and at equal intervals, gaps are left between the plurality of clamping blocks, and the plurality of clamping blocks are inclined, the fixing component also includes a fixing sleeve, the inner side wall of the fixing sleeve is provided with a slope three, the fixing sleeve is provided at the outer end of the clamping block, the slope three is in contact with the clamping block, the fixing sleeve is threadedly connected to the threaded block, and the end of the pull wire is located in the middle of the plurality of clamping blocks.

[0021] In a second aspect, the present invention provides a method for using an ophthalmic capsulorhexis forceps, comprising the following steps:

[0022] S1: Pinch the two pinching pieces with your index finger and thumb respectively, place your middle finger on the limit button, and then insert the guide tube along the corneal incision;

[0023] S2: Use the index finger and thumb to pinch the two pinching pieces together. At this time, the movable connecting rod rotates to push the driving block 1 upward to drive the limit rod to move, thereby pulling the pull wire. Then the fixed shaft drives the driving block 2 to move upward, driving the two tweezer head clips to slide along the movable groove to approach each other and clamp the capsule membrane.

[0024] S3: The middle finger moves to the position of the first limit slot and pushes inward, so that the limit button rotates downward, and the connecting rod pushes the grip ring against the limit rod. The limit block is stuck in the second limit slot to limit the limit rod, and the two tweezer head clips are locked;

[0025] S4: Move the middle finger upward to the reset slot and push the limit button to rotate the limit button in the opposite direction. The connecting rod drives the grip ring to move outward to release the lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A first overall structural diagram provided for an embodiment of the present application;

[0028] Figure 2 A second overall structural diagram provided for an embodiment of the present application;

[0029] Figure 3 A schematic diagram of a local structure provided for an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the structure of a drive assembly provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of the exploded structure of a drive assembly provided in an embodiment of the present application;

[0032] Figure 6 A schematic diagram of the structure of the limit assembly provided in the embodiment of the present application;

[0033] Figure 7 A schematic diagram of the explosion structure of the limit assembly provided in an embodiment of the present application;

[0034] Figure 8 Provided for the embodiments of this application Figure 7 The enlarged structural diagram at A in the middle;

[0035] Fig. 9 A schematic diagram of the overall structure of the capsulorhexis assembly provided in an embodiment of the present application;

[0036] Fig.10 A schematic diagram of a cross-sectional structure of a capsulorhexis assembly provided in an embodiment of the present application;

[0037] Fig.11 A schematic diagram of the exploded structure of the capsulorhexis assembly provided in an embodiment of the present application;

[0038] Fig.12 A schematic diagram of a partial explosion structure of a capsulorhexis assembly provided in an embodiment of the present application;

[0039] Fig.13 A schematic diagram of the structure of a second driving block provided in an embodiment of the present application;

[0040] Fig.14 A schematic diagram of the fixing assembly structure provided in an embodiment of the present application.

[0041] Description of the numbers in the figure:

[0042] 1. Hold the grip;

[0043] 2. Kneading tablets;

[0044] 3. Driving assembly; 31. Active connecting rod; 32. Connecting block; 33. Active block; 34. Driving block 1; 35. Telescopic spring;

[0045] 4. Limiting assembly; 41. Limiting button; 42. Reset slot; 43. Limiting slot 1; 44. Fixed rod; 45. Connecting rod; 46. Movable rod; 47. Limiting rod; 48. Grip ring; 49. Limiting block; 410. Limiting slot 2;

[0046] 5. Install the block;

[0047] 6. Install the cylinder;

[0048] 7. Lead tube;

[0049] 8. Capsulotomy assembly; 81. Sleeve; 82. Spacer; 83. Return spring; 84. Fixed shaft; 85. Mounting plate; 86. Capsulotomy forceps head; 87. Slider 1; 88. Driving block 2; 89. Slider 2; 810. Movable slot; 811. Driving slot; 812. Inclined surface 1; 813. Inclined surface 2; 814. Forceps head clip;

[0050] 9. Pull the wire;

[0051] 10. Chute;

[0052] 11. Fixing assembly; 111. Fixing sleeve; 112. Inclined surface three; 113. Fixing bottom plate; 114. Pressing block; 115. Threaded block. DETAILED DESCRIPTION

[0053] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0054] Based on this, the related technology can be improved in that the traditional capsulotomy forceps are connected to the end handle, and the capsule is torn off after the front end of the forceps tip is inserted into the corneal incision. However, the incision on the cornea is usually small, and the forceps tip is connected to the forceps handle. This causes the forceps tip to move at the corneal incision every time it is closed or opened, which can easily cause damage to the cornea.

[0055] Example 1: Please refer to Figure 1-Figure 14 , an ophthalmic capsulorhexis forceps, comprising: a hand-held gripping rod 1 and a pull wire 9, the bottom end of the hand-held gripping rod 1 is fixedly connected to a mounting tube 6, the inside of the mounting tube 6 is hollow, a driving component 3 is arranged inside the mounting tube 6, the outer end of the hand-held gripping rod 1 is rotatably connected to two kneading pieces 2, the bottom end of the mounting tube 6 is fixedly connected to a mounting block 5, a channel connected to the mounting tube 6 is arranged inside the mounting block 5, a guide tube 7 is fixedly connected to the bottom end of the guide tube 7, a capsulorhexis component 8 is arranged at the end of the guide tube 7, a fixing component 11 is arranged inside the capsulorhexis component 8, the outer end of the mounting tube 6 is fixedly connected to the mounting block 5, and a fixing component 11 is arranged inside the capsulorhexis component 8. A limiting component 4 is provided at the end, and the pull wire 9 is made of aramid fiber material. The capsulotomy component 8 includes two symmetrically arranged capsulotomy forceps heads 86 and a driving block 2 88. The two capsulotomy forceps heads 86 are driven by the driving block 2 88 to move in opposite directions. The outer edges of the two capsulotomy forceps heads 86 are fixedly connected with a forceps head clip 814, and the outer edges of the forceps head clip 814 are arranged in an arc shape. The guide tube 7 is arranged in a hollow shape, and the guide tube 7 is connected to the inside of the mounting tube 6 through the mounting block 5. The upper half of the guide tube 7 is in a vertical state, and the lower half of the guide tube 7 is arranged in a curved shape.

[0056] Cataract surgery is a common eye surgery, which is an eye disease caused by lens opacity leading to blurred vision. The doctor will enter the eye by cutting the surface of the eyeball. Generally, minimally invasive techniques are used, using tools such as capsulorhexis forceps to tear open the lens capsule in order to remove the cloudy lens. After removing the cloudy lens, the doctor will implant an artificial lens to restore the normal function of the patient's eyeball. The device in this scheme is mainly used for ophthalmology to tear off the capsule membrane on the lens during cataract surgery in order to subsequently remove the cloudy lens. The mounting tube is fixed at the bottom of the handheld handle 1. 6. The interior of the mounting tube 6 is hollow, so that the driving assembly 3 can be arranged inside. The mounting block 5 is fixed at the bottom of the mounting tube 6. The mounting block 5 is mainly used to fix the guide tube 7 at the bottom. The guide tube 7 is made of metal material. The upper half of the guide tube 7 is in a vertical downward state, and the lower half of the guide tube 7 is in a horizontally bent state, so that when the end of the guide tube 7 is inserted into the corneal incision of the eye, the hand-held handle 1 will not block the line of sight, and at the same time, the doctor's hand can hold the device vertically in a natural state without lateral operation.

[0057] A pull wire 9 is arranged inside the guide tube 7. The head end of the pull wire 9 passes through the mounting block 5 and extends to the inside of the mounting tube 6, and is connected to the limiting rod 47. The tail end of the pull wire 9 extends to the inside of the sleeve 81 and is connected to the fixing component 11. The pull wire 9 is made of aramid fiber material, that is, Kevlar fiber. Kevlar fiber has the characteristic of high strength, so that the pull wire 9 can repeatedly pull the capsulorhexis assembly 8 without being damaged. The capsulorhexis assembly 8 mainly drives the capsulorhexis forceps 86 on both sides to move by the up and down movement of the driving block 2 88, so that only the guide tube 7 enters the cornea of ​​the eye. The driving block 2 88 is driven by the pull wire 9 to make the two capsulorhexis forceps heads 86 move and clamp. Therefore, when the two capsulorhexis forceps heads 86 are moving and clamping, the guide tube 7 will not shake at the incision of the cornea of ​​the eye, so that it is not easy to cause damage to the incision of the cornea when clamping or loosening.

[0058] The driving assembly 3 arranged inside the mounting tube 6 cooperates with the kneading piece 2 to pull the pull wire 9 to drive the capsulorhexis assembly 8. The limiting assembly 4 arranged at the outer end of the mounting tube 6 is mainly used to limit the driving assembly 3. A limiting rod 47 is fixed at the bottom end of the driving block 34. The limiting block 49 on the grip ring 48 is engaged with the limiting groove 2 410, so that the driving block 34 can be fixed and will not move up and down. By rotating the limiting button 41 up and down slightly, the connecting rod 45 can drive the grip ring 48 to move. When the capsule membrane is clamped, the driving block 34 can be fixed by the limiting rod 47, so that the driving block 2 88 cannot be reset. At this time, the doctor does not need to distract his attention to pinch the kneading piece 2 hard to keep the capsulorhexis forceps head 86 clamping action, thereby reducing the burden of the doctor's long-term operation.

[0059] Optionally, in some embodiments, see Figure 1-Figure 5 The driving assembly 3 includes a driving block 34, which is located inside the mounting tube 6. Two symmetrically distributed slide grooves 10 are provided at the outer end of the mounting tube 6. Both ends of the driving block 34 pass through the two slide grooves 10 respectively. Both ends of the driving block 34 are fixedly connected with movable blocks 33, and the movable block 33 fits with the outer surface of the mounting tube 6.

[0060] The driving assembly 3 also includes two movable connecting rods 31, which are rotatably installed on the outer ends of the kneading piece 2. The outer ends of the two movable blocks 33 are fixedly connected with connecting blocks 32. The end of the movable connecting rod 31 away from the kneading piece 2 is rotatably connected to the connecting block 32. The top of the driving block 34 is fixedly connected with a telescopic spring 35. The end of the telescopic spring 35 away from the driving block 34 is connected to the top of the installation tube 6. The kneading piece 2 drives the movable connecting rod 31 to move upward by rotating, and the driving block 34 is reset by the telescopic spring 35.

[0061] The driving assembly 3 in the present scheme is mainly used to drive the capsular tearing assembly 8. Two symmetrically distributed kneading pieces 2 are rotatably connected to the outer end of the hand-held handle 1. The kneading pieces 2 are rotatably connected to the hand-held handle 1 through the top end, and are rotatably connected to the movable connecting rod 31 near the bottom end of the kneading pieces 2. The driving block 34 is located inside the mounting tube 6 and can slide up and down inside the mounting tube 6. Two sliding grooves 10 are provided on the outside of the mounting tube 6. Both ends of the driving block 34 extend to the outside through the sliding grooves 10 and are slidably connected to the sliding grooves 10. The parts extending on both sides of the driving block 34 are fixed with movable blocks 33. The movable block 33 is arranged in an arc shape and is tightly attached to the outer enclosure of the mounting tube 6. It is mainly used to limit the driving block 34 and improve the stability of the driving block 34 when it moves up and down.

[0062] The outer end of the movable block 33 is fixed with a connecting block 32, and the connecting block 32 is rotatably connected to the other end of the movable connecting rod 31, so that the movable connecting rod 31 is in an inclined state. The top of the driving block 34 is fixed with a telescopic spring 35, and the other end of the telescopic spring 35 is fixed to the inner top of the mounting tube 6. The bottom end of the driving block 34 is fixed with a limit rod 47, and the bottom end of the limit rod 47 is fixedly connected with a pull wire 9. When using the device, the index finger and thumb are respectively pinched to hold the two pinching pieces 2, similar to the posture of holding a pen. Then, the two kneading pieces 2 are slowly and forcefully pinched to make the two kneading pieces 2 rotate inwardly. At this time, the movable connecting rod 31 will rotate, and the driving block 34 will be pushed upward, so that the driving block 34 drives the limiting rod 47 to move, thereby pulling the pull wire 9 to drive the capsulorhexis assembly 8. At the same time, the driving block 34 will also compress the telescopic spring 35. Therefore, when you let go, the driving block 34 can be reset by the force of the telescopic spring 35, so that the capsulorhexis assembly 8 can be driven by the driving assembly 3.

[0063] Optionally, in some embodiments, see Figure 6-Figure 8 The limit assembly 4 includes a limit button 41, and a reset groove 42 and a limit groove 43 are respectively provided at the outer end of the limit button 41. The outer end of the limit button 41 is rotatably connected to a fixing rod 44, and the fixing rod 44 is fixedly installed at the outer end of the mounting tube 6. The limit button 41 rotates by using the rotation connection with the fixing rod 44 as a fulcrum. The outer end of the limit button 41 is rotatably connected to a connecting rod 45, and the end of the connecting rod 45 away from the limit button 41 is rotatably connected to a movable rod 46.

[0064] The limit assembly 4 also includes a limit rod 47, and one end of the movable rod 46 away from the connecting rod 45 passes through the side wall of the mounting tube 6 and extends to the inside, and one end of the movable rod 46 is fixedly connected to a grip ring 48, and the limit rod 47 is fixedly installed at the bottom end of the driving block 34, and the inner side of the grip ring 48 is fixedly connected to the limit block 49, and the outer surrounding of the limit rod 47 is provided with a plurality of limit grooves 410 distributed at equal intervals, and the limit grooves 410 are adapted to the limit blocks 49, and the grip ring 48 is adapted to the limit rod 47, and the grip ring 48 is clamped in the limit groove 410 through the limit block 49 to limit the limit rod 47, and the bottom end of the limit rod 47 is connected to one end of the pull wire 9.

[0065] The limit assembly 4 in this scheme is mainly used to limit the driving assembly 3. The outer end of the limit button 41 is rotatably connected to the fixing rod 44 near the middle, wherein the limit button 41 is arranged in an M shape, and a reset groove 42 and a limit groove 1 43 are respectively provided at the outer end of the limit button 41, and the reset groove 42 is located above the limit groove 1 43. The other end of the fixing rod 44 is fixed on the mounting tube 6, and the limit button 41 is mounted on the mounting tube 6 through the fixing rod 44. The outer end of the limit button 41 is rotatably connected to the connecting rod 45 near the bottom, and the other end of the connecting rod 45 is rotatably connected to the movable rod 4. 6. The movable rod 46 passes through the side wall of the installation tube 6 and extends to the inside thereof. At the same time, the movable rod 46 can slide at the penetration point of the installation tube 6. One end of the movable rod 46 located inside the installation tube 6 is fixed with a grip ring 48. The grip ring 48 is arranged in a semicircular shape. A limit block 49 is fixed on the inner side of the grip ring 48. The outer end of the limit rod 47 is provided with a plurality of limit grooves 410 equidistantly distributed vertically. When the limit block 49 on the grip ring 48 is stuck in the limit groove 410, the limit rod 47 can be limited so that it can no longer move up and down, thereby limiting the entire device.

[0066] When the index finger and thumb of the user pinch the two kneading pieces 2, the limit button 41 will be located at the position of the middle finger. When the middle finger is pressed against the limit groove 43 on the limit button 41 and pushed inward with force, the limit button 41 will rotate downward with the fixed rod 44 and its connection as the fulcrum for rotation, so that the limit button 41 pushes the connecting rod 45, so that the connecting rod 45 can push the movable rod 46, so that the grip ring 48 presses against the limit rod 47. When the limit needs to be released, it is only necessary to move the middle finger slightly upward to the reset groove 42, and then push the limit button 41 to make the limit button 41 rotate in the opposite direction, and then the connecting rod 45 can drive the movable rod 46 to move the grip ring 48 to the limit rod 47. 6 moves outward to release the limit, and the limit control of the device can be completed by using the middle finger to push the limit button 41. When tearing off the capsular membrane, it is necessary to clamp the rupture of the capsular membrane first, and then keep clamping it to slowly tear off the capsular membrane on the lens. Therefore, the capsular membrane needs to be clamped all the time during the tearing process. However, since the eyes are small, the doctor needs to concentrate highly on the operation, and long-term hard pinching can easily cause hand fatigue. By limiting the position through the limit component 4 in the present solution, there is no need to pinch the capsular membrane after clamping it, so that the doctor can focus on the tearing operation, thereby reducing the doctor's operating burden.

[0067] Optionally, in some embodiments, see Figure 9-13 The capsulorhexis assembly 8 also includes a sleeve 81 and a fixed shaft 84. The sleeve 81 is fixedly connected to one end of the guide tube 7 away from the mounting block 5. The pull wire 9 sequentially penetrates the mounting block 5 and the guide tube 7 and extends to the inside of the sleeve 81. A partition 82 is fixedly connected to the inner wall of the sleeve 81. The top end of the fixed shaft 84 penetrates the partition 82. The outer end of the fixed shaft 84 is fixedly connected to the mounting plate 85. A reset spring 83 is provided in the outer sheath of the fixed shaft 84. The two ends of the reset spring 83 are respectively connected to the mounting plate 85 and the partition 82. The driving block 88 is reset by the action of the reset spring 83.

[0068] The bottom end of the fixed shaft 84 is fixedly connected to the driving block 88. The driving block 88 is provided with inclined planes 813 on both sides. The two capsulotomy forceps heads 86 are provided with inclined planes 812 matched with the inclined planes 813 on one side close to each other. The inclined planes 812 and 813 are in contact with each other, and the driving block 88 is located between the two capsulotomy forceps heads 86.

[0069] The outer ends of the two capsulotomy forceps heads 86 are fixedly connected with a slider 1 87, and the inner wall of the sleeve 81 is provided with two movable grooves 810 adapted to the slider 1 87. The capsulotomy forceps heads 86 are slidably connected with the movable groove 810 through the slider 1 87. The outer end of the inclined surface 1 812 is fixedly connected with a slider 2 89. The outer ends of the inclined surfaces 2 813 on both sides of the driving block 2 88 are provided with driving grooves 811 adapted to the slider 2 89. The slider 2 89 is slidably connected with the driving groove 811. The driving block 2 88 drives the slider 2 89 through the driving groove 811, thereby driving the capsulotomy forceps heads 86 to move.

[0070] The capsulorhexis assembly 8 in this scheme is arranged at the end of the guide tube 7, and is mainly used to clamp the capsule membrane. A sleeve 81 is fixed at the end of the guide tube 7, and the sleeve 81 is connected to the inside of the guide tube 7. A partition 82 is fixedly connected inside the sleeve 81. The top of the fixed shaft 84 passes through the partition 82 and is connected to the bottom of the fixed assembly 11. The driving block 2 88 is fixed at the bottom end of the fixed shaft 84. At the same time, a reset spring 83 is arranged on the outer sleeve. A mounting plate 85 is also fixed at the outer end of the fixed shaft 84. The spring 83 is located between the mounting plate 85 and the partition plate 82, so that when the mounting plate 85 is moved by the fixed shaft 84, the reset spring 83 can be compressed. Two symmetrically distributed capsulotomy forceps heads 86 are also arranged inside the sleeve 81, and a slider 87 is fixed on the top of the capsulotomy forceps head 86. On the inner wall of the sleeve 81, two movable grooves 810 adapted to the slider 87 are opened, and the capsulotomy forceps head 86 is slidably connected to the movable groove 810 on the inner wall of the sleeve 81 through the slider 87.

[0071] A slope 1 812 is provided on the top of the capsulorhexis forceps head 86, and slopes 2 813 matching the slope 1 812 are provided on both sides of the driving block 2 88. The slopes 1 812 and the slopes 2 813 can fit closely together. A slider 2 89 is fixed on the slope 1 812 of the capsulorhexis forceps head 86, and driving grooves 811 are provided on the slopes 2 813 on both sides of the driving block 2 88. The slider 2 89 is slidably connected to the driving groove 811, so that when the pull wire 9 drives When the fixed assembly 11 moves upward, the fixed shaft 84 will drive the second driving block 88 to move upward, and the mounting plate 85 will also compress the return spring 83. Since the capsulotomy forceps head 86 is slidably connected to the driving groove 811 through the second slider 89, and the capsulotomy forceps head 86 is also slidably connected to the movable groove 810 through the first slider 87, the upwardly moving second driving block 88 will drive the two capsulotomy forceps heads 86 to slide along the movable groove 810 and approach each other to form a clamping state.

[0072] When the user releases the pinching piece 2, since the pull wire 9 has a certain flexibility, it will only become bent when it is released. At this time, the loosely bent pull wire 9 will not pull the fixed shaft 84. Through the force of the reset spring 83, the fixed shaft 84 can be pushed downward, so that the driving block 2 88 will move downward, so that the two capsulotomy forceps heads 86 are moved away from each other, thereby achieving the effect of loosening. This is different from the traditional capsulotomy forceps. Since the tip of the traditional capsulotomy forceps is integrated with the handle of the forceps, when the handle of the forceps drives the tip of the forceps to open or close, it will move at the incision of the cornea, which is easy to damage the cornea. After the guide tube 7 in this solution enters the eye from the incision of the cornea, no matter whether the capsulotomy forceps head 86 is opened or closed, the guide tube 7 will not move at the incision of the cornea, thereby reducing the damage during the operation.

[0073] It is worth mentioning that a forceps clip 814 is fixed at the outer edge of the capsulotomy forceps head 86. When clamping, the forceps clip 814 will also clamp the capsule membrane. The edge of the forceps clip 814 is arranged in an arc shape, and it is also in the form of a flat sheet. Compared with the existing minimally invasive surgical forceps, the clamping end of the surgical forceps is similar to the front end of the traditional capsulotomy forceps, and most of them are in the form of an eagle-beak-shaped sharp hook. When the tearing operation is performed in the eye, the sharp hook is easy to touch other parts of the eye, which can easily lead to injury due to misoperation. The present solution can improve the safety during operation by arranging the forceps clip 814 at the edge of the capsulotomy forceps head 86.

[0074] Optionally, in some embodiments, see Fig.10 and Fig.14 The fixing assembly 11 includes a fixed base plate 113, the bottom end of the fixed base plate 113 is fixedly connected to the fixed shaft 84, the top of the fixed base plate 113 is fixedly connected to a threaded block 115, the top of the threaded block 115 is fixedly connected to a plurality of clamping blocks 114 distributed equidistantly in a ring shape, gaps are left between the plurality of clamping blocks 114, and the plurality of clamping blocks 114 are arranged at an incline.

[0075] The fixing assembly 11 also includes a fixing sleeve 111, the inner wall of which is provided with a slope three 112, the fixing sleeve 111 is sleeved on the outer end of the clamping block 114, the slope three 112 abuts against the clamping block 114, the fixing sleeve 111 is threadedly connected to the threaded block 115, and the end of the pull wire 9 is located in the middle of multiple clamping blocks 114.

[0076] The fixing assembly 11 in this scheme is mainly used to fix the end of the pull wire 9 in the sleeve 81. The fixing base plate 113 is fixed on the partition plate 82. The top of the fixing base plate 113 is fixed with a threaded block 115. The top of the threaded block 115 is fixed with a plurality of clamping blocks 114 distributed equidistantly in an annular shape. Gaps are provided between the plurality of clamping blocks 114. The middle is hollow so that the pull wire 9 can be inserted. The clamping blocks 114 are inclined. The bottom of the fixing sleeve 111 is threadedly connected to the threaded block 115. The part is also provided with a bevel three 112, which is adapted to the clamping block 114. When the pull wire 9 passes through the fixing sleeve 111 and is located between multiple clamping blocks 114, the fixing sleeve 111 is rotated downward to connect the fixing sleeve 111 with the threaded block 115. At this time, the multiple clamping blocks 114 will be pressed by the bevel three 112 and move toward the middle, so that the pull wire 9 can be clamped and fixed. It is worth mentioning that the head end of the pull wire 9 is located inside the mounting tube 6, and can also be fixed to the bottom end of the limiting rod 47 by the fixing assembly 11.

[0077] The implementation principle of an ophthalmic capsulorhexis forceps in Example 1 of the present application is as follows:

[0078] When the device is used to clamp the capsule membrane, the guide tube 7 needs to be inserted from the incision of the cornea of ​​the eye first. At this time, the index finger and thumb are pinched on the two pinching pieces 2 respectively, and then the middle finger is placed on the limit button 41, similar to the posture of holding a pen, and then the two pinching pieces 2 are slowly and forcefully pinched, and the movable connecting rod 31 will rotate to push the driving block 34 upward, so that the driving block 34 drives the limit rod 47 to move, so that the pull wire 9 can be pulled. When the pull wire 9 drives the fixing component 11 to move upward, this When the fixed shaft 84 drives the second driving block 88 to move upward, the capsulotomy forceps head 86 is slidably connected with the movable groove 810 through the slider 1 87, and the upwardly moving driving block 88 drives the two capsulotomy forceps heads 86 to slide along the movable groove 810 and approach each other to form a clamping state. A forceps head clip 814 is fixed at the outer edge of the capsulotomy forceps head 86, and the edge is arranged in an arc shape and is also in a flat sheet shape to prevent it from touching other parts of the eye and causing damage, thereby improving the safety during operation;

[0079] After being clamped, it can be limited. There is no need to hold it all the time. Use the middle finger to push the limit groove 1 43 inward, and the limit button 41 will rotate downward, so that the connecting rod 45 can push the movable rod 46, and the grip ring 48 will be against the limit rod 47. When the limit block 49 on the grip ring 48 is stuck in the limit groove 2 410, the limit rod 47 can be limited so that it can no longer move up and down, so that the doctor can focus on the tearing operation, thereby reducing the doctor's operating burden;

[0080] When the limit needs to be released, the middle finger only needs to be slightly moved upward to the reset groove 42, and then the limit button 41 is pushed to rotate the limit button 41 in the opposite direction. At this time, the connecting rod 45 can drive the movable rod 46 to move outward, thereby releasing the limit.

[0081] Embodiment 2: This embodiment of the present application provides a method for using an ophthalmic capsulotomy forceps, comprising the following steps:

[0082] S1: pinch the two kneading pieces 2 with the index finger and thumb respectively, put the middle finger on the limit button 41, and then insert the guide tube 7 along the corneal incision;

[0083] S2: Use the index finger and thumb to pinch the two pinching pieces 2, and then the movable connecting rod 31 rotates to push the driving block 1 34 upward to drive the limit rod 47 to move, thereby pulling the pull wire 9, and then the fixed shaft 84 drives the driving block 2 88 to move upward, driving the two tweezer head clips 814 to slide along the movable groove 810 to approach each other to clamp the capsule membrane;

[0084] S3: The middle finger moves to the position of the limiting groove 1 43 and pushes inward, so that the limiting button 41 rotates downward, and the connecting rod 45 pushes the grip ring 48 against the limiting rod 47, and the limiting block 49 is stuck in the limiting groove 2 410 to limit the limiting rod 47, and the two tweezer head clips 814 are locked;

[0085] S4: Move the middle finger upward to the reset groove 42 to push the limit button 41, so that the limit button 41 rotates in the opposite direction, and the connecting rod 45 drives the grip ring 48 to move outward to release the lock.

Claims

1. An ophthalmic capsulorhexis forceps, characterized in that: include: A hand-held handle (1), wherein the bottom end of the hand-held handle (1) is fixedly connected to a mounting tube (6), the inside of the mounting tube (6) is hollow, a driving assembly (3) is arranged inside the mounting tube (6), the outer end of the hand-held handle (1) is rotatably connected to two kneading pieces (2), the bottom end of the mounting tube (6) is fixedly connected to a mounting block (5), a passage communicating with the mounting tube (6) is arranged inside the mounting block (5), a guide tube (7) is fixedly connected to the bottom end of the guide tube (7), a capsulorhexis assembly (8) is arranged at the end of the capsulorhexis assembly (8), a fixing assembly (11) is arranged inside the capsulorhexis assembly (8), and a limit assembly (4) is arranged at the outer end of the mounting tube (6); A pull wire (9), wherein the pull wire (9) is made of aramid fiber material; The capsulotomy assembly (8) comprises two symmetrically arranged capsulotomy forceps heads (86) and a second driving block (88), the two capsulotomy forceps heads (86) are driven by the second driving block (88) to move in opposite directions, the outer edges of the two capsulotomy forceps heads (86) are fixedly connected to forceps head clips (814), and the outer edges of the forceps head clips (814) are arranged in an arc shape; The guide tube (7) is hollow, the guide tube (7) is connected to the interior of the installation tube (6) through the installation block (5), the upper half of the guide tube (7) is vertical, and the lower half of the guide tube (7) is bent; The limit assembly (4) comprises a limit button (41), the outer ends of the limit button (41) are respectively provided with a reset groove (42) and a limit groove 1 (43), the outer end of the limit button (41) is rotatably connected to a fixing rod (44), the fixing rod (44) is fixedly mounted on the outer end of the mounting tube (6), the limit button (41) is rotated by using the rotatable connection with the fixing rod (44) as a fulcrum, the outer end of the limit button (41) is rotatably connected to a connecting rod (45), and the end of the connecting rod (45) away from the limit button (41) is rotatably connected to a movable rod (46); The limit assembly (4) further comprises a limit rod (47), one end of the movable rod (46) away from the connecting rod (45) passes through the side wall of the mounting tube (6) and extends to the inside, and one end of the movable rod (46) is fixedly connected to a grip ring (48), the limit rod (47) is fixedly mounted on the bottom end of the driving block (34), the inner side of the grip ring (48) is fixedly connected to a limit block (49), the outer periphery of the limit rod (47) is provided with a plurality of limit grooves (410) distributed at equal intervals, the limit grooves (410) are matched with the limit block (49), the grip ring (48) is matched with the limit rod (47), the grip ring (48) is clamped in the limit groove (410) through the limit block (49) to limit the limit rod (47), and the bottom end of the limit rod (47) is connected to one end of the pull wire (9).

2. An ophthalmic capsulorhexis forceps according to claim 1, characterized in that: The driving assembly (3) comprises a driving block (34), wherein the driving block (34) is located inside the mounting tube (6), and two symmetrically distributed slide grooves (10) are provided at the outer end of the mounting tube (6), and two ends of the driving block (34) respectively penetrate the two slide grooves (10), and both ends of the driving block (34) are fixedly connected to movable blocks (33), and the movable blocks (33) are in contact with the outer surface of the mounting tube (6).

3. An ophthalmic capsulorhexis forceps according to claim 2, characterized in that: The driving assembly (3) further comprises two movable connecting rods (31), the two movable connecting rods (31) being rotatably mounted on the outer ends of the kneading plate (2), the outer ends of the two movable blocks (33) being fixedly connected to connecting blocks (32), the ends of the movable connecting rods (31) being away from the kneading plate (2) being rotatably connected to the connecting blocks (32), the top end of the driving block 1 (34) being fixedly connected to a telescopic spring (35), the end of the telescopic spring (35) being away from the driving block 1 (34) being connected to the top end inside the mounting tube (6), the kneading plate (2) driving the movable connecting rods (31) to drive the driving block 1 (34) to move upwards by rotating, and the driving block 1 (34) is reset by the telescopic spring (35).

4. The ophthalmic capsulorhexis forceps according to claim 1, characterized in that: The capsulorhexis assembly (8) further comprises a sleeve (81) and a fixed shaft (84); the sleeve (81) is fixedly connected to one end of the guide tube (7) away from the mounting block (5); the pull wire (9) sequentially passes through the mounting block (5) and the guide tube (7) and extends to the inside of the sleeve (81); a partition plate (82) is fixedly connected to the inner wall of the sleeve (81); the top end of the fixed shaft (84) passes through the partition plate (82); the outer end of the fixed shaft (84) is fixedly connected to the mounting plate (85); and a return spring (83) is provided in the outer sheath of the fixed shaft (84); the two ends of the return spring (83) are respectively connected to the mounting plate (85) and the partition plate (82); the second driving block (88) is returned to its original position by the action of the return spring (83).

5. The ophthalmic capsulorhexis forceps according to claim 4, characterized in that: The bottom end of the fixed shaft (84) is fixedly connected to the second driving block (88), and the two sides of the second driving block (88) are provided with a second inclined surface (813). The two capsulorhexis forceps heads (86) are close to each other and are provided with a first inclined surface (812) adapted to the second inclined surface (813). The first inclined surface (812) and the second inclined surface (813) are in contact with each other, and the second driving block (88) is located between the two capsulorhexis forceps heads (86).

6. The ophthalmic capsulorhexis forceps according to claim 5, characterized in that: The outer ends of the two capsulotomy forceps heads (86) are fixedly connected to a slider 1 (87); the inner side wall of the sleeve (81) is provided with two movable grooves (810) adapted to the slider 1 (87); the capsulotomy forceps heads (86) are slidably connected to the movable grooves (810) via the slider 1 (87); the outer end of the inclined surface 1 (812) is fixedly connected to a slider 2 (89); the outer ends of the inclined surfaces 2 (813) on both sides of the driving block 2 (88) are provided with driving grooves (811) adapted to the slider 2 (89); the slider 2 (89) is slidably connected to the driving grooves (811); the driving block 2 (88) drives the slider 2 (89) via the driving grooves (811), thereby driving the capsulotomy forceps heads (86) to move.

7. The ophthalmic capsulorhexis forceps according to claim 4, characterized in that: The fixing component (11) comprises a fixing base plate (113), the bottom end of the fixing base plate (113) is fixedly connected to the fixing shaft (84), the top end of the fixing base plate (113) is fixedly connected to a threaded block (115), the top end of the threaded block (115) is fixedly connected to a plurality of annularly equidistantly distributed clamping blocks (114), gaps are left between the plurality of clamping blocks (114), and the plurality of clamping blocks (114) are arranged in an inclined manner, the fixing component (111) further comprises a fixing sleeve (111), the inner side wall of the fixing sleeve (111) is provided with a third inclined surface (112), the fixing sleeve (111) is sleeved on the outer end of the clamping block (114), the third inclined surface (112) is in contact with the clamping block (114), the fixing sleeve (111) is threadedly connected to the threaded block (115), and the end of the pull wire (9) is located in the middle of the plurality of clamping blocks (114).

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