Cataract crystal nucleus extractor

Abstract

The invention belongs to the technical field of medical instruments, and discloses a cataract crystal nucleus extractor which comprises a handle, and a mounting plate is movably connected to the top of an inner cavity of the handle. By arranging the elastic arc piece, the pull rod, the push block and the roller, when an operator uses the device, the push block is pulled downwards, so that the pull rod drives the elastic arc piece to move towards the interior of the handle through the mounting plate, and then the elastic arc piece is gradually folded under the extrusion of the roller, so that the width of the handle is reduced, and then the elastic arc piece is inserted through the notch; at the moment, the elastic arc piece moves upwards by pushing the push block upwards, so that the elastic arc piece is restored under the elastic recovery effect, the crystal nucleus is sleeved with the elastic arc piece, then the operator pulls the push block downwards again, the elastic arc piece is gradually folded to prevent the crystal nucleus from sliding off, and therefore the crystal nucleus is firmly locked in the elastic arc piece; at the moment, the elastic arc sheet is taken out along the notch, so that the crystal nucleus can be taken out.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a cataract lens nucleus extractor. Background Art

[0002] Cataract refers to an eye disease caused by partial or complete opacity and color change of the lens due to various reasons, which in turn causes decreased vision and blurred vision. The causes of cataract are complex and may be related to multiple factors such as aging, ultraviolet radiation, eye lesions, high myopia, trauma, surgery, metabolic diseases and drug poisoning.

[0003] During cataract surgery, the key step is to remove the lens nucleus that has become cloudy in the eye. An incision is made in the eye to remove the nucleus, and the forceps are inserted along the incision to clamp and remove the lens nucleus. Although this method can remove the lens nucleus, due to the inherent smoothness of the surface of the lens nucleus, it is often difficult to clamp it firmly for the first time, forcing the surgeon to make multiple attempts. This not only prolongs the operation time and reduces the efficiency of the operation, but more importantly, it may increase the risk of trauma to the patient and the difficulty of postoperative recovery. Therefore, it needs to be improved. Summary of the invention

[0004] The object of the present invention is to provide a cataract lens nucleus extractor to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: A cataract lens nucleus extractor comprises a handle, a mounting plate is movably connected to the top of the handle inner cavity, an elastic arc piece is fixedly connected to the top of the mounting plate, a pull rod is fixedly connected to the bottom of the mounting plate, a push block is fixedly connected to the bottom end of the pull rod, the outer surface of the push block is movably connected to the inner wall of the handle, mounting frames are movably installed on both the left and right sides of the top of the handle inner cavity, a circular shaft is movably sleeved inside the mounting frame, a roller is fixedly sleeved on the outer surface of the circular shaft, the outer surface of the roller is movably connected to the outer surface of the elastic arc piece, a connecting plate is fixedly connected to the bottom of the mounting frame, the bottom end of the connecting plate is hinged to an articulated rod, there are two articulated rods, and the bottoms of the two articulated rods are hinged to a movable plate, the side of the movable plate is movably connected to the inner surface of the handle, a threaded rod is sleeved on the internal thread of the movable plate, the bottom end of the threaded rod passes through the handle and extends to the bottom of the handle and is movably sleeved with the inner wall of the handle, and the outer surface of the threaded rod is fixedly sleeved with a rotating plate located at the bottom of the handle.

[0006] Preferably, the outer surface of the rotating plate is provided with anti-slip grooves, and the inner surface of the elastic arc sheet is fixedly mounted with a tooth block.

[0007] Preferably, a cutting knife is movably sleeved inside the mounting plate, and a connecting rod is fixedly connected to the bottom of the cutting knife.

[0008] Preferably, a first spring is fixedly connected to the bottom of the connecting rod, and the bottom of the first spring is fixedly connected to the bottom of the inner surface of the handle.

[0009] Preferably, a movable rod is fixedly connected to the bottom of the left side of the connecting rod, a push plate located outside the handle is fixedly connected to the left side of the movable rod, and an outer surface of the push plate is movably connected to the outer surface of the handle.

[0010] Preferably, both the front and rear sides of the top of the inner cavity of the handle are provided with limiting grooves, and a limiting block is movably installed inside the limiting groove, and the outer surface of the limiting block is fixedly connected to the outer surface of the mounting frame.

[0011] Preferably, a fixing plate located at the left and right sides of the push block is fixedly installed inside the handle, and a vertical groove and a clamping groove are respectively opened inside the fixing plate.

[0012] Preferably, a moving block is movably sleeved inside the rear end of the push block, and fixed shafts are fixedly connected to the left and right sides of the moving block. The outer surface of the fixed shaft is movably sleeved with a movable wheel located inside the slot, and the outer surface of the movable wheel is movably connected to the inner surface of the slot.

[0013] Preferably, a round rod is fixedly connected to the front side of the moving block, the front end of the round rod passes through the push block and extends to the front side of the push block and is fixedly connected to a pressure plate, a sleeve plate is fixedly sleeved on the outer surface of the round rod, the outer surface of the sleeve plate is movably sleeved on the inner wall of the push block, a second spring is fixedly connected to the back side of the sleeve plate, and the other end of the second spring is fixedly connected to the inner wall of the push block.

[0014] Preferably, a support block is fixedly installed in the middle of the inner cavity of the handle, and the outer surface of the support block is movably connected to the connecting rod, the threaded rod and the pull rod respectively.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention provides an elastic arc piece, a pull rod, a push block and a roller. When in use, the operator pulls the push block downward, so that the pull rod drives the elastic arc piece to move toward the inside of the handle through the mounting plate, and then the elastic arc piece gradually closes under the pressure of the roller, thereby reducing the width of the handle. The elastic arc piece is then inserted through the incision. At this time, the push block is pushed upward to move the elastic arc piece upward, and then it is restored under the elastic recovery effect, thereby the crystal nucleus is sleeved inside the elastic arc piece. Then the operator pulls the push block downward again, so that the elastic arc piece gradually closes to prevent the crystal nucleus from slipping, thereby firmly locking the crystal nucleus inside the elastic arc piece. At this time, the elastic arc piece is taken out along the incision, so that the crystal nucleus can be taken out.

[0016] 2. The present invention provides a cutting knife, a connecting rod, a movable rod and a push plate. When the crystal nucleus is large and hard, in order to reduce the damage to the patient during removal, when the crystal nucleus is sleeved inside the elastic arc sheet, the push plate can be pushed upward so that the movable rod drives the connecting rod to move upward, so that the cutting knife can move upward along the inner surface of the mounting plate, and then cut the crystal nucleus, thereby reducing the volume of the crystal nucleus and reducing damage to the patient.

[0017] 3. The present invention provides a vertical slot, a clamping slot, a movable wheel and a pressure plate. When the operator pushes the push block downward, the pressure plate is first pressed inward, so that the pressure plate drives the movable block to move inward through the round rod, and the movable wheel moves to the inside of the vertical slot, thereby releasing the restriction on the push block. At this time, the operator can push the push block to move downward. When the elastic arc sheet closes and clamps the crystal nucleus, the operator releases the pressure plate, so that the second spring pushes the sleeve plate to move outward under the action of elastic recovery, and then drives the movable block to move outward through the round rod, so that the movable wheel enters the inside of the clamping slot, thereby restricting the movement of the push block, so that the operator does not have to press the push block for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic cross-sectional structural diagram of the side of the present invention; Figure 3 It is a schematic cross-sectional view of the handle of the present invention; Figure 4 It is a cross-sectional structural schematic diagram of the front side of the present invention; Figure 5 for Figure 4 Schematic diagram of the structure inside the middle handle; Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of the middle roller; Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of the middle cutting knife; Figure 8 It is a schematic cross-sectional structural diagram of the fixing plate of the present invention; Fig. 9 It is a structural schematic diagram of the fixing plate of the present invention; Fig.10 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle; Fig.11 for Figure 3 A schematic diagram of the local enlarged structure at B in the middle; Fig.12 for Figure 5 A schematic diagram of the local enlarged structure at C in the middle; Fig.13 for Figure 6 A schematic diagram of the local enlarged structure at D in the middle; Fig.14 for Figure 8 Schematic diagram of the local enlarged structure at point E in the middle.

[0019] In the figure: 1. handle; 2. mounting plate; 3. elastic arc sheet; 4. pull rod; 5. push block; 6. mounting frame; 7. round shaft; 8. roller; 9. connecting plate; 10. hinged rod; 11. movable plate; 12. threaded rod; 13. rotating plate; 14. anti-skid pattern; 15. tooth block; 16. cutting knife; 17. connecting rod; 18. first spring; 19. movable rod; 20. push plate; 21. limit groove; 22. limit block; 23. fixed plate; 24. vertical groove; 25. card slot; 26. movable block; 27. fixed shaft; 28. movable wheel; 29. ​​round rod; 30. pressure plate; 31. sleeve plate; 32. second spring; 33. support block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 14 As shown, an embodiment of the present invention provides a cataract lens nucleus extractor, including a handle 1, a mounting plate 2 is movably connected to the top of the inner cavity of the handle 1, an elastic arc sheet 3 is fixedly connected to the top of the mounting plate 2, a pull rod 4 is fixedly connected to the bottom of the mounting plate 2, a push block 5 is fixedly connected to the bottom end of the pull rod 4, the outer surface of the push block 5 is movably connected to the inner wall of the handle 1, mounting frames 6 are movably installed on both sides of the top of the inner cavity of the handle 1, a circular shaft 7 is movably sleeved inside the mounting frame 6, a roller 8 is fixedly sleeved on the outer surface of the circular shaft 7, and the outer surface of the roller 8 is movably sleeved with the elastic The outer surface of the arc piece 3 is movably connected, and the bottom of the mounting frame 6 is fixedly connected with a connecting plate 9, and the bottom end of the connecting plate 9 is hinged with a hinged rod 10. There are two hinged rods 10, and the bottoms of the two hinged rods 10 are hinged with a movable plate 11. The side of the movable plate 11 is movably connected to the inner surface of the handle 1, and the internal thread of the movable plate 11 is sleeved with a threaded rod 12. The bottom end of the threaded rod 12 penetrates the handle 1 and extends to the bottom of the handle 1 and is movably sleeved with the inner wall of the handle 1. The outer surface of the threaded rod 12 is fixedly sleeved with a rotating plate 13 located at the bottom of the handle 1.

[0022] By setting the elastic arc piece 3, the elastic arc piece 3 can clamp the cataract crystal nucleus and then take it out. When the cataract crystal nucleus is located inside the elastic arc piece 3, the operator can rotate the rotating plate 13 so that the rotating plate 13 drives the threaded rod 12 to rotate, thereby making the movable plate 11 move downward, and then drive the two connecting plates 9 to move towards each other through the hinged rod 10, so that the two rollers 8 move towards each other through the mounting frame 6, so that the distance between the two rollers 8 is reduced. At this time, by pulling the push block 5 downward, the elastic arc piece 3 is driven to move toward the inside of the handle 1 through the pull rod 4, so that the elastic arc piece 3 gradually closes, thereby clamping and taking out the cataract crystal nucleus.

[0023] The outer surface of the rotating plate 13 is provided with anti-slip grooves 14 , and the inner surface of the elastic arc piece 3 is fixedly provided with a tooth block 15 .

[0024] By providing the tooth block 15, the elastic arc piece 3 can firmly clamp the cataract lens nucleus after closing, so as to prevent the cataract lens nucleus from falling off.

[0025] A cutting knife 16 is movably sleeved inside the mounting plate 2 , and a connecting rod 17 is fixedly connected to the bottom of the cutting knife 16 .

[0026] When the connecting rod 17 moves upward, it will drive the cutting knife 16 to move upward inside the mounting plate 2, so that the cataract lens nucleus can be cut into small pieces, which is convenient for removal and reduces damage to the patient.

[0027] The bottom of the connecting rod 17 is fixedly connected to a first spring 18 , and the bottom of the first spring 18 is fixedly connected to the bottom of the inner surface of the handle 1 .

[0028] When the connecting rod 17 moves upward, the first spring 18 will be stretched, so that the first spring 18 can drive the connecting rod 17 and the cutting knife 16 to reset under the action of elastic recovery.

[0029] Among them, a movable rod 19 is fixedly connected to the bottom of the left side of the connecting rod 17, and a push plate 20 located outside the handle 1 is fixedly connected to the left side of the movable rod 19. The outer surface of the push plate 20 is movably connected to the outer surface of the handle 1.

[0030] The operator can push the push plate 20 upward, thereby driving the connecting rod 17 to move upward through the movable rod 19 .

[0031] Among them, both the front and rear sides of the top of the inner cavity of the handle 1 are provided with limiting grooves 21, and the limiting blocks 22 are movably installed inside the limiting grooves 21, and the outer surface of the limiting blocks 22 is fixedly connected to the outer surface of the mounting frame 6.

[0032] By providing the limit block 22 , the limit block 22 can limit the mounting bracket 6 , so that the mounting bracket 6 can only move toward or away from each other.

[0033] A fixing plate 23 located at the left and right sides of the push block 5 is fixedly installed inside the handle 1 , and a vertical groove 24 and a clamping groove 25 are respectively opened inside the fixing plate 23 .

[0034] By providing the card slot 25 , the movement of the push block 5 can be restricted, thereby preventing the operator from pressing the push block 5 by hand for a long time.

[0035] Among them, the rear end of the push block 5 is movably sleeved with a moving block 26, and the left and right sides of the moving block 26 are fixedly connected with a fixed shaft 27. The outer surface of the fixed shaft 27 is movably sleeved with a movable wheel 28 located inside the slot 25, and the outer surface of the movable wheel 28 is movably connected to the inner surface of the slot 25.

[0036] When the movable wheel 28 is located inside the slot 25 , the push block 5 will be restricted so that the push block 5 cannot move up and down.

[0037] Among them, the front side of the moving block 26 is fixedly connected with a round rod 29, the front end of the round rod 29 passes through the push block 5 and extends to the front side of the push block 5 and is fixedly connected with a pressure plate 30, the outer surface of the round rod 29 is fixedly sleeved with a sleeve plate 31, the outer surface of the sleeve plate 31 is movably sleeved with the inner wall of the push block 5, the back side of the sleeve plate 31 is fixedly connected with a second spring 32, and the other end of the second spring 32 is fixedly connected to the inner wall of the push block 5.

[0038] When the operator presses the pressing plate 30 inward, the moving block 26 will be driven to move inward through the round rod 29 , so that the movable wheel 28 enters the interior of the vertical slot 24 .

[0039] A support block 33 is fixedly installed in the middle of the inner cavity of the handle 1, and the outer surface of the support block 33 is movably connected with the connecting rod 17, the threaded rod 12 and the pull rod 4 respectively.

[0040] By providing the support block 33 , the support block 33 can support and limit the connecting rod 17 , the threaded rod 12 and the pull rod 4 , so that the connecting rod 17 , the threaded rod 12 and the pull rod 4 can move more stably.

[0041] Working principle and usage process: When in use, the operator first pulls the push block 5 downward to make the pull rod 4 drive the mounting plate 2 to move downward, so that the mounting plate 2 drives the elastic arc piece 3 to move toward the inside of the handle 1, and then the elastic arc piece 3 is gradually closed under the pressure of the roller 8, thereby reducing the width of the elastic arc piece 3, and then the elastic arc piece 3 is inserted through the incision, and then the push block 5 is reset to reset the elastic arc piece 3. The elastic arc piece 3 will be restored under the action of elasticity, so that the crystal core is sheathed inside the elastic arc piece 3, thereby preventing the crystal core from slipping, and then the operator rotates the rotating plate 13 to make the rotating plate 13 drive the screw The grooved rod 12 rotates, causing the movable plate 11 to move downward, and then drives the two connecting plates 9 to move toward each other through the hinged rod 10, so that the two rollers 8 move toward each other through the mounting frame 6, so that the distance between the two rollers 8 is reduced, which can make the elastic arc piece 3 close more tightly when moving toward the inside of the handle 1, thereby strengthening the clamping ability of the elastic arc piece 3 on the crystal nucleus. At this time, the operator pulls the push block 5 downward to make the elastic arc piece 3 gradually close to prevent the crystal nucleus from slipping, thereby firmly locking the crystal nucleus inside the elastic arc piece 3. At this time, the elastic arc piece 3 is taken out along the incision, so that the crystal nucleus can be taken out.

[0042] When the crystal nucleus is too large and needs to be cut, when the elastic arc piece 3 covers the crystal nucleus, the push plate 20 can be pushed upward so that the movable rod 19 drives the cutting knife 16 to rise through the connecting rod 17, and the cutting knife 16 will pass through the handle 1 and move to the inside of the elastic arc piece 3, thereby cutting the crystal nucleus. After the cutting is completed, the operator releases the push plate 20, and the first spring 18 will drive the connecting rod 17 to reset under the action of elastic recovery, so that the cutting knife 16 returns to the inside of the handle 1.

[0043] When the operator pushes the push block 5 downward, he first presses the pressure plate 30 inward, so that the pressure plate 30 drives the movable block 26 to move inward through the round rod 29, so that the movable block 26 drives the movable wheel 28 to move to the inside of the vertical slot 24 through the fixed shaft 27, thereby releasing the restriction on the push block 5. At this time, the operator can push the push block 5 to move downward. When the elastic arc piece 3 closes and clamps the crystal nucleus, the operator releases the pressure plate 30, so that the second spring 32 pushes the sleeve plate 31 to move outward under the action of elastic recovery, and then drives the movable block 26 to move outward through the round rod 29, so that the movable wheel 28 enters the inside of the slot 25, thereby restricting the movement of the push block 5, so that the operator does not have to press the push block 5 for a long time, which is convenient for the operator to use.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cataract lens nucleus extractor, comprising a handle (1), characterized in that: The top of the inner cavity of the handle (1) is movably connected to a mounting plate (2), the top of the mounting plate (2) is fixedly connected to an elastic arc sheet (3), the bottom of the mounting plate (2) is fixedly connected to a pull rod (4), the bottom end of the pull rod (4) is fixedly connected to a push block (5), the outer surface of the push block (5) is movably connected to the inner wall of the handle (1), the left and right sides of the top of the inner cavity of the handle (1) are movably mounted with mounting frames (6), the inside of the mounting frame (6) is movably sleeved with a round shaft (7), the outer surface of the round shaft (7) is fixedly sleeved with a roller (8), the outer surface of the roller (8) is movably connected to the outer surface of the elastic arc sheet (3), the A connecting plate (9) is fixedly connected to the bottom of the mounting frame (6), and a hinged rod (10) is hingedly connected to the bottom end of the connecting plate (9). There are two hinged rods (10), and a movable plate (11) is hingedly connected to the bottom of the two hinged rods (10). The side of the movable plate (11) is movably connected to the inner surface of the handle (1). The inner thread of the movable plate (11) is sleeved with a threaded rod (12). The bottom end of the threaded rod (12) passes through the handle (1) and extends to the bottom of the handle (1) and is movably sleeved with the inner wall of the handle (1). The outer surface of the threaded rod (12) is fixedly sleeved with a rotating plate (13) located at the bottom of the handle (1).

2. The cataract lens nucleus extractor according to claim 1, characterized in that: The outer surface of the rotating plate (13) is provided with anti-slip grooves (14), and the inner surface of the elastic arc sheet (3) is fixedly mounted with a tooth block (15).

3. The cataract lens nucleus extractor according to claim 1, characterized in that: A cutting knife (16) is movably sleeved inside the mounting plate (2), and a connecting rod (17) is fixedly connected to the bottom of the cutting knife (16).

4. The cataract lens nucleus extractor according to claim 3, characterized in that: The bottom of the connecting rod (17) is fixedly connected to a first spring (18), and the bottom of the first spring (18) is fixedly connected to the bottom of the inner surface of the handle (1).

5. The cataract lens nucleus extractor according to claim 3, characterized in that: A movable rod (19) is fixedly connected to the bottom of the left side of the connecting rod (17), and a push plate (20) located outside the handle (1) is fixedly connected to the left side of the movable rod (19), and the outer surface of the push plate (20) is movably connected to the outer surface of the handle (1).

6. The cataract lens nucleus extractor according to claim 1, characterized in that: Limiting grooves (21) are provided on both the front and rear sides of the inner cavity top of the handle (1), a limiting block (22) is movably installed inside the limiting groove (21), and the outer surface of the limiting block (22) is fixedly connected to the outer surface of the mounting frame (6).

7. The cataract lens nucleus extractor according to claim 1, characterized in that: A fixing plate (23) located on the left and right sides of the push block (5) is fixedly installed inside the handle (1), and a vertical groove (24) and a clamping groove (25) are respectively provided inside the fixing plate (23).

8. The cataract lens nucleus extractor according to claim 1, characterized in that: A moving block (26) is movably sleeved inside the rear end of the push block (5), and a fixed shaft (27) is fixedly connected to the left and right sides of the moving block (26). A movable wheel (28) located inside the slot (25) is movably sleeved on the outer surface of the fixed shaft (27), and the outer surface of the movable wheel (28) is movably connected to the inner surface of the slot (25).

9. The cataract lens nucleus extractor according to claim 8, characterized in that: The front side of the moving block (26) is fixedly connected to a round rod (29), the front end of the round rod (29) passes through the push block (5) and extends to the front side of the push block (5) and is fixedly connected to a pressure plate (30), the outer surface of the round rod (29) is fixedly sleeved with a sleeve plate (31), the outer surface of the sleeve plate (31) is movably sleeved with the inner wall of the push block (5), the back side of the sleeve plate (31) is fixedly connected to a second spring (32), and the other end of the second spring (32) is fixedly connected to the inner wall of the push block (5).

10. The cataract lens nucleus extractor according to claim 1, characterized in that: A support block (33) is fixedly mounted in the middle of the inner cavity of the handle (1), and the outer surface of the support block (33) is movably sleeved with the connecting rod (17), the threaded rod (12) and the pull rod (4) respectively.

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