High-strength cataract nucleus breaking handle

Abstract

The invention relates to a high-strength cataract nucleus breaking handle which comprises a pocket knife fixing part, a push-pull rod and a handle part, the pocket knife fixing part comprises a catheter, a clamping seat and a pre-tightening ring, the lower ends of two metal connecting pieces of a pocket knife penetrate through the catheter and the interior of the clamping seat, and the penetrating parts of the lower ends of the two metal connecting pieces are turned outwards and upwards to form bent edges; the two bent edges are attached to the outer side of the annular step, the annular step is sleeved with the pre-tightening ring, and the two bent edges are pressed on the outer side of the annular step through the pre-tightening ring. And a clamping groove for clamping the clamping seat is designed at the front end of the push-pull rod. The invention has the advantages that the metal connecting sheet of the net-bag-shaped knife is fixed in advance through the pocket knife fixing part to form primary clamping connection, then the pocket knife fixing part is clamped with the clamping groove at the front end of the push-pull rod for the second time, and the front end of the push-pull rod is positioned in the second inner hole of the middle fixing piece when being pulled back to form tertiary clamping, so that the mode is free from gluing and welding; the tail end of the net-bag-shaped knife is connected and matched with the push-pull rod in a high-strength mode, and the requirement for follow-up powerful pull-back operation is met.

Description

Technical Field

[0001] The invention relates to the field of cataract nucleus fragmentation medical devices, and in particular to a high-strength cataract nucleus fragmentation handle. Background Art

[0002] Currently, during cataract surgery, the lens of the eye needs to be crushed, then removed and replaced with an artificial lens to treat the cataract.

[0003] In order to crush the lens, our company has developed a pocket knife, which is used to crush the lens through manual operation combined with pure instrumentation. The push handles used in the current nuclear crushing instruments on the market can easily meet the requirements of sending the pocket knife into the eyeball, but when the pocket knife crushes the lens, it is necessary to pull back the pocket knife. The push handle provides a high pull-back force to ensure that the pocket knife contracts at the mouth of the support tube or support ring to squeeze the lens out of the pocket knife for crushing; but the push handles on the market can hardly meet this pulling force; the pocket knife is made of a metal ring made of memory titanium alloy and two metal connecting pieces are led out from the rear end of the metal ring, and a net bag-shaped knife is installed on the metal ring; At present, the metal connecting piece and the push handle are fixedly connected by gluing, which has two problems: one is that the pulling force is not enough, and the other is that the net bag-shaped knife needs to be inserted into the eyeball for surgery, and medical adhesive cannot ensure absolute safety, so gluing cannot be used; At present, there is another method that the push handle is made of metal. However, the high-temperature laser welding of the metal connecting piece made of titanium alloy requires a temperature of more than 3000. The net bag made of organic molecules installed on the metal ring cannot withstand high temperature and is easy to be damaged. Therefore, the metal welding method cannot meet the requirements. Furthermore, the metal connecting piece is very small and cannot be connected by threading because it is not strong enough to be rotated; At present, it is necessary to develop a push-pull handle that can effectively insert the net bag-shaped knife and subsequently control the pulling back of the net bag-shaped knife with high strength and high security. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a high-strength cataract nucleus crushing handle with ingenious design and reasonable and compact structure, which can quickly and safely connect the net bag-shaped knife and the handle part to meet the high-strength pullback requirements.

[0005] The technical solution of the present invention: A high-strength cataract nucleus crushing handle, which includes a pocket knife fixing part, a push-pull rod, and a handle part. The pocket knife includes a metal ring, a metal connecting piece and a net bag-shaped knife. The net bag-shaped blade part is installed on the metal ring around one side, and two metal connecting pieces are connected to one side of the metal ring; the pocket knife fixing part includes a catheter, a clamping seat, and a pre-tightening ring. The rear end of the catheter is fixed on the clamping seat and the catheter is connected to the rear end of the clamping seat. An annular step is designed on the outer side of the rear end of the clamping seat. The lower ends of the two metal connecting pieces of the pocket knife pass through the inside of the catheter and the clamping seat, and the lower ends of the two metal connecting pieces are folded outward and upward to form a bent edge. The two bent edges are attached to the outer side of the annular step. The pre-tightening ring is sleeved on the outer side of the annular step and the pre-tightening ring presses the two bent edges tightly on the outer side of the annular step; the push-pull The front end of the rod is designed with a slot for the card holder to be installed. The handle part includes a front fixed part, an intermediate fixed part and a rear movable part. The front fixed part is provided with a first inner hole for guiding a pocket knife and a catheter. The middle of the intermediate fixed part is also provided with a second inner hole for the push-pull rod to slide back and forth. The push-pull rod is slidably installed in the intermediate fixed part. The front end of the push-pull rod is fixedly connected to the pocket knife through a pocket knife fixing part. The front end of the intermediate fixed part is quickly connected to the rear end of the front fixed part. The push-pull rod controls the pocket knife to pass through the first inner hole of the front fixed part through the pocket knife fixing part, and the net bag-shaped knife is reserved on the outside of the front end of the front fixed part; a third inner hole is designed in the rear movable part, and the rear movable part is rotatably connected to the outside of the rear end of the intermediate fixed part through the third inner hole. The rear end of the push-pull rod passes through the second inner hole of the intermediate fixed part and is connected to the rear end end of the rear movable part.

[0006] The lower end of the conduit passes through the middle of the holder to form an annular step, and the conduit is fixedly connected to the holder; the conduit is sleeved on the outside of the metal connecting piece, and the front end of the conduit is located close to the metal ring.

[0007] A sliding bar is designed on both sides of the push-pull rod, and corresponding sliding grooves are designed on both sides of the second inner hole of the middle fixed piece. The push-pull rod is slidably installed in the sliding groove of the middle fixed piece through the sliding bar; the slot is designed to be a U-shaped slot, and the two sides of the inner side of the U-shaped slot are respectively designed with inverted teeth. A rectangular protrusion is also provided on the upper end of the socket, and the head of the rectangular protrusion is designed to be chamfered. The socket is located in the slot and the rectangular protrusion is stuck in the U-shaped slot, and the inverted teeth on the inner side of the U-shaped slot are blocked on both sides of the tail of the rectangular protrusion.

[0008] The rear end of the push-pull rod is designed with a mushroom-shaped clamping head and a strip groove in the middle of the clamping head. The head of the clamping head is also designed with a transverse hole perpendicular to the axial direction of the push-pull rod. The rear port portion of the third inner hole of the rear movable part is designed as a fine hole, and the clamping head passes through the fine hole with interference fit. A gasket is also inserted in the strip groove of the clamping head, and the bottom of the gasket is against the root of the strip groove. A circular hole is designed on the gasket, and the circular hole is installed concentrically with the transverse hole. A metal pin is installed in the transverse hole and the circular hole for positioning connection.

[0009] The rear end of the intermediate fixed piece is designed with an external thread, and the third inner hole of the rear movable piece is designed with an internal thread. The rear movable piece is rotated on the external thread of the rear end of the intermediate fixed piece through the internal thread for spiral engagement.

[0010] A clamping block is designed on both sides of the rear end of the front fixing piece, and a clamping groove is designed on both sides of the front end of the middle fixing piece. The clamping blocks are respectively clamped in the clamping grooves for positioning.

[0011] An insert block is designed on one side of the front fixing piece near the rear end, a dovetail groove is designed on both sides of the insert block, and a slot is also designed in the middle of the insert block. An insert plate is designed on one side of the front end of the middle fixing piece, and an insert strip is designed in the middle of the inner side of the insert plate. A dovetail block protruding inward is respectively provided on both sides of the inner side of the insert plate. The insert plate is inserted into the slot of the insert block through the insert strip, and the insert plate is slidably inserted into the dovetail grooves on both sides of the insert block through the dovetail blocks on both sides; two sections of grooves are also provided in the middle of the dovetail groove, and two sections of protrusions are also designed in the middle of the dovetail block. The front end of the dovetail block and the front end of the two sections of protrusions are both designed with guide chamfers; the two sections of protrusions are located in the two sections of grooves for positioning and matching.

[0012] The first inner hole of the front fixing member is designed as an oblate conical hole, the first inner hole has a larger diameter near the rear end and a smaller diameter away from the rear end, and the overall shape of the front fixing member is also designed as an oblate conical body.

[0013] A plurality of protrusions are designed on both sides of the front fixed part; and a plurality of stripes are also designed on the outer side of the rear movable part.

[0014] The front end of the front fixing member is also designed with a support tube, the inner hole of the support tube is connected with the first inner hole, and the mouth of the support tube is designed to be an inclined mouth; the inner hole of the support tube is also designed to be a conical hole with a large aperture at the mouth, and the first inner hole close to the front fixing member has a small aperture.

[0015] The advantages of the present invention are: The design is ingenious, the structure is reasonable and compact, the metal connecting piece of the net bag-shaped knife is pre-fixed by the pocket knife fixing part to form a primary clamping connection, and then the pocket knife fixing part is clamped for a secondary time with the front end slot of the push-pull rod. When the front end of the push-pull rod is pulled back, it is still located in the second inner hole of the middle fixed part, forming a triple clamping. This method has no gluing, no welding, and is not a threaded connection method, so that the tail end of the net bag-shaped knife and the push-pull rod are connected with high strength to meet the subsequent strong pullback surgical operation requirements. After the tail end of the push-pull rod is clamped to the rear end of the rear movable part through an elastic mushroom-shaped clamp, a gasket is installed between the mushroom-shaped clamps to prevent the clamp from shrinking and detaching under force. In order to better improve the tensile strength, the gasket is connected to the clamp through a metal pin so that the clamp is effectively blocked at the rear end of the rear movable part. The front fixing piece and the middle fixing piece are connected by snap-fitting to achieve quick and effective connection. The rear movable part and the middle fixed part rotate together to realize the forward and backward movement of the push rod. The push rod and the middle fixed piece are slidably matched by means of a slide bar and a slide groove, so as to ensure the stable operation of the push rod, and the middle fixed piece effectively clamps the front end of the push rod to ensure stability when pulling back. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the present invention.

[0017] Figure 2 It is a transverse cross-sectional view of the present invention.

[0018] Figure 3 yes Figure 2 An enlarged schematic diagram of the fixing part of the middle pocket knife.

[0019] Figure 4 yes Figure 2 An enlarged schematic diagram of the middle push rod and the rear end of the rear movable part.

[0020] Figure 5 It is a schematic diagram of the connection between the front fixing piece and the middle fixing piece of the present invention.

[0021] Figure 6 Schematic diagram of the intermediate fixing member of the present invention.

[0022] Figure 7 It is a schematic diagram of the front fixing member of the present invention.

[0023] Figure 8 It is a schematic diagram of the push-pull rod of the present invention being connected to the pocket cutter through the pocket cutter fixing portion.

[0024] Fig. 9 It is a schematic diagram of the rear end of the pocket knife connected to the pocket knife fixing part of the present invention.

[0025] Fig.10 It is a vertical cross-sectional view of the present invention. DETAILED DESCRIPTION

[0026] See attached Figure 1-10A high-strength cataract nucleus crushing handle, which includes a pocket knife fixing part 1, a push-pull rod 2, and a handle part 3. The pocket knife 4 includes a metal ring 41, a metal connecting piece 42 and a net bag-shaped knife 43. The mouth of the net bag-shaped knife 43 is installed on the metal ring 41 around the mouth, and two metal connecting pieces 42 are connected to one side of the metal ring 41; the pocket knife fixing part 1 includes a catheter 11, a clamping seat 12, and a pre-tightening ring 13. The rear end of the catheter 11 is fixed on the clamping seat 12 and the catheter 11 is connected to the rear end of the clamping seat 12. An annular step 14 is designed on the outer side of the rear end of the clamping seat 12. The lower ends of the two metal connecting pieces 42 of the pocket knife 4 pass through the inside of the catheter 11 and the clamping seat 12, and the lower ends of the two metal connecting pieces 42 are folded outward and upward to form a bending edge 421. The two bending edges 421 are attached to the outer side of the annular step 14. The pre-tightening ring 13 is sleeved on the outer side of the annular step 14, and the pre-tightening ring 13 presses the two bending edges 421 tightly on the annular step 1 4 outside; the front end of the push-pull rod 2 is designed with a card slot 21 for the card seat 12 to be clamped, the handle part 3 includes a front fixed piece 31, an intermediate fixed piece 32 and a rear movable piece 33, the front fixed piece 31 is provided with a first inner hole for the pocket knife 4 and the guide tube 11 to be guided in the middle, and the middle fixed piece 32 is also provided with a second inner hole for the push-pull rod 2 to slide back and forth, the push-pull rod 2 is slidably installed in the intermediate fixed piece 32, the front end of the push-pull rod 2 is fixedly connected to the pocket knife 4 through the pocket knife fixing part 1, the front end of the intermediate fixed piece 32 is quickly clamped with the rear end of the front fixed piece 31, and the push-pull rod 2 controls the pocket knife 4 to pass through the first inner hole of the front fixed piece 31 through the pocket knife fixing part 1, and the net bag-shaped knife 43 is reserved on the outside of the front end of the front fixed piece 31; a third inner hole is designed in the rear movable piece 33, and the rear movable piece 33 is rotatably connected to the outside of the rear end of the intermediate fixed piece 32 through the third inner hole, and the rear end of the push-pull rod 2 passes through the second inner hole of the intermediate fixed piece 32 and is connected to the rear end end of the rear movable piece 33.

[0027] The lower end of the conduit 11 passes through the middle of the holder 12 to form an annular step 14, and the conduit 11 and the holder 12 are fixedly connected; the conduit 11 is sleeved on the outside of the metal connecting piece, and the front end of the conduit is located close to the metal ring. The design of the front end of the conduit close to the metal ring can effectively support the metal connecting piece, so that the metal connecting piece has a certain supporting strength, and does not cause "soft feet phenomenon", ensuring that the metal ring and the mesh pocket knife can effectively stretch, flip and other actions. The conduit can be made of stainless steel pipe, and the holder is made of plastic material, and the two are connected to form a whole by injection molding. The conduit and the holder can also be made of plastic material for integral injection molding.

[0028] The slot 21 is designed as a U-shaped slot, and the inner sides of the U-shaped slot are respectively designed with inverted teeth 211. The upper end of the card seat 12 is also provided with a rectangular protrusion 121, and the head of the rectangular protrusion 121 is designed to be chamfered. The card seat 12 is located in the slot 21 and the rectangular protrusion 121 is stuck in the U-shaped slot. The inverted teeth 211 on the inner side of the U-shaped slot are blocked on both sides of the tail of the rectangular protrusion 121. The inverted teeth are designed with chamfers near the mouth to facilitate the insertion of the rectangular protrusion. The main body of the card seat is just engaged with the U-shaped slot of the card slot. The upper mouth of the U-shaped slot is designed with inverted teeth to lock the rectangular protrusion of the card seat. The anti-slip design improves the tensile strength. After the pre-tightening ring presses the bent edge, it is also externally clamped twice through the U-shaped slot, which is safe and reliable. There can be a circular groove at the bottom of the U-shaped groove, which is designed to accommodate the lower end of the card seat according to needs, but it is not a necessary design.

[0029] A slide bar 22 is respectively designed on both sides of the push-pull rod 2 , and corresponding slide grooves 321 are respectively designed on both sides of the second inner hole of the middle fixed piece 32 . The push-pull rod 2 is slidably installed in the slide groove 321 of the middle fixed piece 32 through the slide bar 22 .

[0030] The rear end of the push-pull rod 2 is designed with a mushroom-shaped clamping head 23 and a strip groove 24 is opened in the middle of the clamping head 23. The head of the clamping head 23 is also designed with a transverse hole 25 perpendicular to the axial direction of the push-pull rod 2. The rear end of the third inner hole of the rear movable member 33 is designed as a fine hole, and the clamping head 23 passes through the fine hole with interference fit. A gasket 26 is also inserted in the strip groove 24 of the clamping head 23. The bottom of the gasket 26 is against the root of the strip groove 24. The gasket 26 is designed with a circular hole, which is installed concentrically with the transverse hole 25. A metal pin 27 is installed in the transverse hole 25 and the circular hole for positioning connection. The metal pin can also be replaced by a circular protrusion. A circular protrusion is designed on both sides of the end of the gasket, and the circular protrusion can be inserted into the transverse hole for support and positioning. The strip groove is designed to ensure that the chuck can be retracted inwards and pass through the fine hole, so that the mushroom-shaped chuck can be stuck on the outside of the fine hole. However, once the pulling force is too large, the chuck may still be retracted and fall out of the fine hole. The gasket is designed to ensure that after the mushroom-shaped chuck is inserted into the fine hole of the rear movable rod, the gasket is filled and supported, and the chuck cannot be retracted through the strip groove. In this way, the rear movable part can effectively pull the drag rod and will not be disengaged. The metal pin is further designed, and the metal pin can be blocked laterally on the outside of the fine hole. The tensile resistance is further improved to ensure that the pull-back strength meets the needs of the operation. There is a clearance fit between the chuck and the fine hole, and the two can move relative to each other. When the rear movable part rotates, it will not rotate with the chuck.

[0031] The rear end of the intermediate fixed member 32 is designed with an external thread, and the third inner hole of the rear movable member 33 is designed with an internal thread. The rear movable member 33 is rotated on the external thread of the rear end of the intermediate fixed member 32 through the internal thread to perform a spiral fit. This design is an existing design, and the present invention is briefly described.

[0032] A clamping block 311 is designed on both sides of the rear end of the front fixing member 31, and a clamping slot 322 is designed on both sides of the front end of the middle fixing member 32. The clamping block 311 is respectively clamped in the clamping slot 322 for positioning. The clamping block and the clamping slot cooperate to effectively prevent the front fixing member and the middle fixing member from rotating relative to each other, and to perform clamping and positioning.

[0033] The front fixing member 31 is provided with an insert block 312 near the rear end, and a dovetail groove 313 is provided on both sides of the insert block 312. A slot 314 is also provided in the middle of the insert block 312. The front end of the middle fixing member 32 is provided with an insert plate 323, and an insert strip 324 is provided in the middle of the inner side of the insert plate 323. Both sides of the inner side of the insert plate 323 are provided with dovetail blocks 325 protruding inwardly. The insert plate 323 is inserted into the insert block through the insert strip 324. The insert plate 323 is inserted into the slot 314 of the insert block 312 and the insert plate 323 is inserted into the dovetail grooves 313 on both sides of the insert block 312 through the dovetail blocks 325 on both sides; the middle position of the dovetail groove 313 is also provided with a second groove 3131, and the middle position of the dovetail block 325 is also provided with a second protrusion 3251, and the front end of the dovetail block 325 and the front end of the second protrusion 3251 are both provided with guide chamfers; the second protrusion 3251 is located in the second groove 3131 for positioning and matching. The structural design of the insert block and the insert plate ensures that the front fixing piece and the middle fixing piece are effectively and quickly connected.

[0034] The first inner hole of the front fixing member 31 is designed as an oblate conical hole, the first inner hole has a larger diameter near the rear end and a smaller diameter far from the rear end, and the overall shape of the front fixing member 31 is also designed as an oblate conical body. The overall oblate conical design of the front fixing member ensures that the front end is small, easy to operate, and has high structural strength.

[0035] The front fixed part 31 is provided with a plurality of protrusions 301 on both sides thereof, and the outer side of the rear movable part 33 is also provided with a plurality of stripes 303. The anti-slip design facilitates the force during operation.

[0036] The front end of the front fixing member 31 is also designed with a support tube 302. The inner hole of the support tube 302 is connected with the first inner hole. The mouth of the support tube 302 is designed to be an inclined mouth. The inner hole of the support tube is also designed to be a conical hole. The mouth has a large aperture, and the first inner hole close to the front fixing member has a small aperture. The design of the inclined mouth and the conical hole ensures that the pocket knife can easily retract and squeeze the lens to break the nucleus when pulling back, thereby ensuring effective cooperation with the pocket knife.

[0037] The front fixed part, the middle fixed part and the rear movable part of the present invention are all made of plastic material, and the push-pull rod can also be made of plastic material. When in use, the rear movable part is rotated to move forward along the middle fixed part, and the rear movable part pushes the push-pull rod forward through the fine hole at the rear end, and the front end of the push-pull rod pushes the pocket knife forward as a whole through the pocket knife fixing part and sends it into the eyeball for surgical operation; when the pocket knife needs to be pulled back to perform the nuclear crushing operation, the rear movable part is rotated to pull back along the middle fixed part, and the rear end of the rear movable part is clamped on the outside of the clamping head through the fine hole to push back, so that the push-pull rod When pulling back, the push-pull rod effectively clamps the base of the pocket knife fixing part through the clamping groove, and the metal connecting piece of the pocket knife is blocked by the folded edge, and then pre-tightened on the outer side of the annular step of the base through the pre-tightening ring for a pre-tightening. The inner wall of the clamping groove of the push-pull rod is clamped on the outer side of the pre-tightening ring for a second clamping, and the outer side of the clamping groove of the push-pull rod is clamped by the second inner hole sleeve of the intermediate fixed part to form a third clamping. The folding of the bending edge combined with the subsequent three clampings effectively ensures the high-strength tensile strength between the pocket knife and the push-pull rod, and it will not loosen, thus meeting the strength requirement for core crushing.

Claims

1. A high-strength cataract nucleus crushing handle, characterized in that: It comprises a pocket knife fixing part, a push-pull rod and a handle part. The pocket knife comprises a metal ring, a metal connecting piece and a net-bag-shaped knife. The net-bag-shaped blade part is installed on the metal ring around one circumference, and two metal connecting pieces are connected to one side of the metal ring; the pocket knife fixing part comprises a guide tube, a clamping seat and a pre-tightening ring. The rear end of the guide tube is fixed on the clamping seat and the guide tube is connected to the rear end of the clamping seat. An annular step is designed on the outer side of the rear end of the clamping seat. The lower ends of the two metal connecting pieces of the pocket knife pass through the inside of the guide tube and the clamping seat, and the lower ends of the two metal connecting pieces are folded outward and upward to form a bent edge. The two bent edges are attached to the outer side of the annular step. The pre-tightening ring is sleeved on the outer side of the annular step and the pre-tightening ring presses the two bent edges against the outer side of the annular step; the front end of the push-pull rod is designed with A card slot for the card holder to be installed, the handle part includes a front fixed part, an intermediate fixed part and a rear movable part. A first inner hole for guiding a pocket knife and a catheter is opened in the middle of the front fixed part, and a second inner hole for the push-pull rod to slide back and forth is also arranged in the middle of the intermediate fixed part. The push-pull rod is slidably installed in the intermediate fixed part. The front end of the push-pull rod is fixedly connected to the pocket knife through a pocket knife fixing part. The front end of the intermediate fixed part is quickly connected to the rear end of the front fixed part. The push-pull rod controls the pocket knife to pass through the first inner hole of the front fixed part through the pocket knife fixing part, and the net bag-shaped knife is reserved on the outside of the front end of the front fixed part; a third inner hole is designed in the rear movable part, and the rear movable part is rotatably connected to the outside of the rear end of the intermediate fixed part through the third inner hole. The rear end of the push-pull rod passes through the second inner hole of the intermediate fixed part and is connected to the rear end end of the rear movable part.

2. A high-strength cataract nucleus crushing handle according to claim 1, characterized in that: The lower end of the conduit passes through the middle of the holder to form an annular step, and the conduit is fixedly connected to the holder; the conduit is sleeved on the outside of the metal connecting piece, and the front end of the conduit is located close to the metal ring.

3. A high-strength cataract nucleus crushing handle according to claim 1, characterized in that: A sliding bar is designed on both sides of the push-pull rod, and corresponding sliding grooves are designed on both sides of the second inner hole of the middle fixed piece. The push-pull rod is slidably installed in the sliding groove of the middle fixed piece through the sliding bar; the slot is designed to be a U-shaped slot, and the two sides of the inner side of the U-shaped slot are respectively designed with inverted teeth. A rectangular protrusion is also provided on the upper end of the socket, and the head of the rectangular protrusion is designed to be chamfered. The socket is located in the slot and the rectangular protrusion is stuck in the U-shaped slot, and the inverted teeth on the inner side of the U-shaped slot are blocked on both sides of the tail of the rectangular protrusion.

4. A high-strength cataract nucleus crushing handle according to claim 1, characterized in that: The rear end of the push-pull rod is designed with a mushroom-shaped clamping head and a strip groove in the middle of the clamping head. The head of the clamping head is also designed with a transverse hole perpendicular to the axial direction of the push-pull rod. The rear port portion of the third inner hole of the rear movable part is designed as a fine hole, and the clamping head passes through the fine hole with interference fit. A gasket is also inserted in the strip groove of the clamping head, and the bottom of the gasket is against the root of the strip groove. A circular hole is designed on the gasket, and the circular hole is installed concentrically with the transverse hole. A metal pin is installed in the transverse hole and the circular hole for positioning connection.

5. The high-strength cataract nucleus crushing handle according to claim 1, characterized in that: The rear end of the intermediate fixed piece is designed with an external thread, and the third inner hole of the rear movable piece is designed with an internal thread. The rear movable piece is rotated on the external thread of the rear end of the intermediate fixed piece through the internal thread for spiral engagement.

6. A high-strength cataract nucleus crushing handle according to claim 1, characterized in that: A clamping block is designed on both sides of the rear end of the front fixing piece, and a clamping groove is designed on both sides of the front end of the middle fixing piece. The clamping blocks are respectively clamped in the clamping grooves for positioning.

7. A high-strength cataract nucleus crushing handle according to claim 1, characterized in that: An insert block is designed on one side of the front fixing piece near the rear end, a dovetail groove is designed on both sides of the insert block, and a slot is also designed in the middle of the insert block. An insert plate is designed on one side of the front end of the middle fixing piece, and an insert strip is designed in the middle of the inner side of the insert plate. A dovetail block protruding inward is respectively provided on both sides of the inner side of the insert plate. The insert plate is inserted into the slot of the insert block through the insert strip, and the insert plate is slidably inserted into the dovetail grooves on both sides of the insert block through the dovetail blocks on both sides; two sections of grooves are also provided in the middle of the dovetail groove, and two sections of protrusions are also designed in the middle of the dovetail block. The front end of the dovetail block and the front end of the two sections of protrusions are both designed with guide chamfers; the two sections of protrusions are located in the two sections of grooves for positioning and matching.

8. The high-strength cataract nucleus crushing handle according to claim 1, characterized in that: The first inner hole of the front fixing member is designed as an oblate conical hole, the first inner hole has a larger diameter near the rear end and a smaller diameter away from the rear end, and the overall shape of the front fixing member is also designed as an oblate conical body.

9. The high-strength cataract nucleus crushing handle according to claim 1, characterized in that: A plurality of protrusions are designed on both sides of the front fixed part; and a plurality of stripes are also designed on the outer side of the rear movable part.

10. The high-strength cataract nucleus crushing handle according to claim 1, characterized in that: The front end of the front fixing member is also designed with a support tube, the inner hole of the support tube is connected with the first inner hole, and the mouth of the support tube is designed to be an inclined mouth; the inner hole of the support tube is also designed to be a conical hole with a large aperture at the mouth, and the first inner hole close to the front fixing member has a small aperture.

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