An intraocular lens injector with integrated aspiration function

Abstract

The application discloses an intraocular lens injector integrated with suction and injection functions, which comprises an injection barrel, a guide-in assembly, a negative pressure assembly and an injection assembly. The guide-in assembly is installed at one end of the injection barrel, and an injection channel for the intraocular lens to pass through is formed in the guide-in assembly. The negative pressure assembly is arranged in the injection barrel and comprises a negative pressure pipe. A negative pressure hole is arranged at the front end of the negative pressure pipe, and the rear end of the negative pressure pipe is used for connecting an external negative pressure device. The injection assembly is in transmission connection with the negative pressure pipe and is used for driving the negative pressure pipe to move along the axial direction, so that the intraocular lens accommodated in the guide-in assembly is pushed to the eye through the injection channel. The intraocular lens injector integrated with suction and injection functions integrates the injection function and the negative pressure suction function, so that the injection assembly pushes the intraocular lens to the eye, and the same negative pressure hole at the front end of the negative pressure pipe can be used to apply suction force to the lens without replacing the instrument, so that the precise fine adjustment and stable positioning of the intraocular lens in the eye can be realized.

Description

Technical Field

[0001] This invention relates to the field of ophthalmic medical device technology, and in particular to an intraocular lens injector with integrated aspiration function. Background Technology

[0002] Cataracts and high myopia are common eye diseases that seriously affect patients' vision and can even lead to blindness. Currently, surgical removal of the cloudy natural lens or correction of refractive errors, followed by implantation of an artificial lens, has become the mainstream treatment method. With the development of minimally invasive surgery, artificial lens injectors have been widely used in clinical practice. These injectors deliver a folded artificial lens into the eye through a small incision, offering advantages such as minimal trauma and rapid recovery. However, existing injectors have a relatively limited function, only capable of delivering the lens and unable to precisely control its final positioning within the eye.

[0003] In actual surgical procedures, due to the softness of the artificial lens material and its unpredictable development within the eye, it is often difficult to accurately implant it into the ideal location in the capsular bag or ciliary sulcus in a single procedure. To adjust the lens position, surgeons typically need to use auxiliary instruments such as positioning hooks and forceps to grasp, manipulate, or press within the eye. Such mechanical interventions not only prolong surgical time and increase the complexity of the procedure but also easily damage fragile intraocular tissues such as the corneal endothelium, iris, and lens capsule, increasing the risk of postoperative complications. Furthermore, frequent instrument changes affect the smoothness of the surgery and place high demands on the surgeon's experience and skill level. Therefore, there is an urgent need for an integrated injection device that combines lens delivery and precise positioning functions to simplify the surgical procedure, improve implantation accuracy, and maximize the protection of intraocular tissues. Summary of the Invention

[0004] This application provides an intraocular lens injector with integrated aspiration function, which solves the technical problems of existing intraocular lens injectors having single function, being unable to accurately position the lens after injection, requiring additional instruments for adjustment, easily damaging intraocular tissues, and being complicated to operate.

[0005] This application provides an intraocular lens injector with integrated aspiration function, the injector comprising:

[0006] Injector cylinder, inlet assembly, negative pressure assembly, and injection assembly;

[0007] The infusion assembly is installed at one end of the injection cylinder, and an injection channel for the artificial lens to pass through is formed inside the infusion assembly;

[0008] The negative pressure assembly is located inside the injection cylinder and includes a negative pressure tube. The front end of the negative pressure tube is provided with a negative pressure hole, and the rear end is used to connect to an external negative pressure device.

[0009] The injection assembly is connected to the negative pressure tube and is used to drive the negative pressure tube to move axially so as to push the artificial lens contained in the infusion assembly into the eye through the injection channel, and apply an adsorption force to the artificial lens through the negative pressure hole after the pushing is completed to assist in positioning.

[0010] In some embodiments, the injection cylinder includes a cylinder body and an end cap, the inlet assembly is mounted at one end of the cylinder body, the end cap is fixed at the other end of the cylinder body, and the injection assembly passes through the end cap and extends into the interior of the cylinder body.

[0011] In some embodiments, the injection assembly includes a push rod, an adapter, and a pagoda connector;

[0012] The adapter is fixedly connected between the push rod and the negative pressure pipe, and the adapter has an internal air passage.

[0013] The push rod passes through the end cap and slides with the end cap to drive the adapter and negative pressure pipe to move axially.

[0014] The pagoda connector is installed on the adapter and communicates with the air passage for connecting to an external negative pressure device.

[0015] The cylinder body has a long slot on its side wall, and the pagoda connector is slidably disposed in the long slot.

[0016] In some embodiments, the negative pressure assembly further includes a return spring;

[0017] The negative pressure tube has a first step at one end near the injection assembly;

[0018] The cylinder body is provided with a limiting ring inside, and the limiting ring is provided with a through hole for the negative pressure pipe to pass through;

[0019] The return spring is sleeved on the negative pressure tube, with one end abutting against the limiting ring and the other end abutting against the end face of the first step.

[0020] In some embodiments, the delivery assembly includes a crystal chamber and a delivery head;

[0021] The crystal chamber is used to accommodate an artificial lens in a folded state, with one end inserted into the end of the barrel and sealed to the barrel by a sealing ring.

[0022] The inlet head has a tapered structure that is wider at the back and narrower at the front. Its rear end is connected to the front end of the crystal chamber, and its tip forms the output end of the artificial lens.

[0023] In some embodiments, the negative pressure assembly further includes a plunger;

[0024] The negative pressure pipe is provided with a second step near the negative pressure hole;

[0025] The plunger is sleeved on the outside of the negative pressure tube and abuts against the second step. The plunger moves synchronously with the negative pressure tube to push the artificial lens out of the inlet assembly.

[0026] In some embodiments, the plunger has a boss-type structure, with the large-diameter end of the plunger facing the inlet assembly.

[0027] In some embodiments, a first water inlet is provided on the side wall of the cylinder, and a second water inlet is provided on the corresponding side wall of the crystal chamber; when the crystal chamber is installed on the cylinder, the first water inlet and the second water inlet are aligned and connected.

[0028] In some embodiments, the head end of the negative pressure tube is rounded, the front end of the negative pressure tube has a flat portion, and the negative pressure hole is disposed on the flat portion.

[0029] In some embodiments, the push rod has a non-circular cross-section, and the end cap has an opening. The push rod cooperates with the opening to restrict the circumferential rotation of the push rod.

[0030] The end of the push rod away from the negative pressure pipe is fixedly provided with a pressing part, and the outer side wall of the injection cylinder is fixedly provided with a wing plate.

[0031] The beneficial effects of this application are as follows:

[0032] The intraocular lens (IOL) injector with integrated suction function provided in this application integrates the injection function with the negative pressure suction function into one unit. This allows the injection component to push the IOL into the eye while simultaneously applying suction force to the IOL using the negative pressure port at the front end of the same negative pressure tube without changing instruments. This enables precise fine-tuning and stable positioning of the IOL within the eye. It effectively avoids the need for additional instruments such as positioning hooks to clamp, manipulate, or press during traditional surgery, significantly simplifying the surgical procedure and reducing the risk of damage to intraocular tissues such as the corneal endothelium and lens capsule caused by mechanical intervention. This not only improves the accuracy and safety of IOL implantation but also reduces the reliance on the surgeon's skill level. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0034] Figure 1 A schematic diagram of the overall structure of an intraocular lens injector with integrated aspiration function provided in this application;

[0035] Figure 2 A partial cross-sectional view of the retracted negative pressure tube in an intraocular lens injector with integrated aspiration function provided in this application;

[0036] Figure 3 A partial cross-sectional view of the negative pressure tube in the extended state of an intraocular lens injector with integrated aspiration function provided in this application;

[0037] Figure 4 A schematic diagram of the cooperation state between the negative pressure component and the injection component in an intraocular lens injector with integrated aspiration function provided in this application;

[0038] Figure 5 A cross-sectional view of the engagement state of the negative pressure component and the injection component in an intraocular lens injector with integrated aspiration function provided in this application;

[0039] Figure 6 A schematic diagram of the cooperation state between the negative pressure tube and the return spring in an intraocular lens injector with integrated aspiration function provided in this application;

[0040] Figure 7 A schematic diagram of the injection component in an intraocular lens injector with integrated injection function provided in this application;

[0041] Figure 8 This is a schematic diagram of the injection cylinder in an intraocular lens injector with integrated injection function provided in this application.

[0042] Among them, 10, injection tube; 11, tube body; 12, end cap; 13, long slot; 14, limiting ring; 15, first water inlet; 16, opening; 17, wing plate;

[0043] 20. Injection component; 21. Injection channel; 22. Crystal chamber; 23. Injection head; 24. Second injection port;

[0044] 30. Negative pressure assembly; 31. Negative pressure pipe; 32. Negative pressure orifice; 33. Return spring; 34. First step; 35. Plunger; 36. Second step; 37. Flat section;

[0045] 40. Injection assembly; 41. Push rod; 42. Adapter; 43. Pagoda connector; 44. Pressing part. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0048] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0049] This application provides an intraocular lens injector with integrated aspiration function, which solves the technical problems of existing intraocular lens injectors having limited functions, being unable to accurately position the lens after injection, requiring additional instruments for adjustment, easily damaging intraocular tissues, and being complex to operate.

[0050] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0051] like Figures 1-3 As shown, this application provides an intraocular lens injector with integrated aspiration function. The injector includes an injection cylinder 10, an inlet component 20, a negative pressure component 30, and an injection component 40. The inlet component 20 is detachably installed at one end of the injection cylinder 10, and an injection channel 21 for the intraocular lens to pass through is formed inside the inlet component 20. The negative pressure component 30 is disposed inside the injection cylinder 10 and includes a negative pressure tube 31. The front end of the negative pressure tube 31 is provided with a negative pressure hole 32, and the rear end extends out of the injection cylinder 10 and is connected to an external negative pressure device through an interface. The injection component 40 is at least partially located inside the injection cylinder 10 and is fixedly or driveably connected to the negative pressure tube 31, so that when the injection component 40 is operated, it can drive the negative pressure tube 31 to move synchronously along the axial direction of the injection cylinder 10.

[0052] In the initial state, the artificial lens is contained in the inlet assembly 20. When the injection assembly 40 is operated to move forward, the negative pressure tube 31 moves forward accordingly, pushing its front end into the eye and ejecting the artificial lens through the injection channel 21. After the ejection is completed, the position of the negative pressure tube 31 is kept unchanged or its position is slightly adjusted. A negative pressure is formed at the negative pressure hole 32 by an external negative pressure device, thereby applying an adsorption force to the released artificial lens and achieving its auxiliary positioning in the eye.

[0053] By integrating the injection and negative pressure adsorption functions, the injection component 40 pushes the intraocular lens into the eye while simultaneously applying adsorption force to the lens using the negative pressure port 32 at the front end of the same negative pressure tube 31 without changing instruments. This achieves precise fine-tuning and stable positioning of the intraocular lens. It effectively avoids the need for additional instruments such as positioning hooks to clamp, manipulate, or press the lens in traditional surgeries, significantly simplifying the surgical procedure and reducing the risk of damage to intraocular tissues such as the corneal endothelium and lens capsule caused by mechanical intervention. This not only improves the accuracy and safety of intraocular lens implantation but also reduces the reliance on the surgeon's skill level.

[0054] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0055] Preferred, such as Figure 1 , Figure 2 , Figure 3 , Figure 8 As shown, the injection cartridge 10 includes a body 11 and an end cap 12. The inlet assembly 20 is detachably installed at the front end of the body 11 to guide the artificial lens into the eye. The end cap 12 is fixed to the rear end of the body 11. The end cap 12 is in the shape of a cylindrical boss and cooperates with the push rod 41. The end cap 12 is fixed to the body 11 by an interference fit between the boss and the end cap 11. The injection assembly 40 passes through the end cap 12 axially and is slidably engaged with the end cap 12. Its front end extends into the interior of the body 11 and is connected to the negative pressure assembly 30. Its rear end protrudes outside the end cap 12 for operation force application.

[0056] By sealing and fixing the end cap 12 to the rear end of the cylinder body 11, and allowing the injection assembly 40 to slide through the end cap 12 to form a sliding fit with it, the internal cavity of the injection cylinder 10 is protected to a certain extent. It can also guide the injection assembly 40 to move smoothly along the axial direction, avoiding deviation or jamming. This allows the injection force to be transmitted to the negative pressure assembly 30 efficiently and linearly, ensuring the reliability and repeatability of the artificial lens delivery, and providing a stable mechanical basis for subsequent adsorption and positioning through the same negative pressure tube 31, thereby improving the smoothness and accuracy of the surgical operation.

[0057] Preferred, such as Figures 1-5 , Figure 7As shown, the injection assembly 40 includes a push rod 41, an adapter 42, and a pagoda connector 43. The adapter 42 is fixedly connected between the push rod 41 and the negative pressure tube 31. The adapter 42 has an internal air passage. The rear end of the negative pressure tube 31 is threaded, and the negative pressure tube 31 and the adapter 42 are threaded together. A sealing ring is provided at the connection between the negative pressure tube 31 and the adapter 42. The push rod 41 is axially oriented, with its front end extending into the cylinder body 11 and its rear end protruding outside the injection cylinder 10 for operation. The push rod 41 passes through the end cap 12 and slides with the end cap 12 to drive the adapter 42 and the negative pressure tube 31 to move axially. The pagoda connector... 43 is installed on the adapter 42. One end of the air passage is connected to the inner cavity of the negative pressure pipe 31, and the other end is connected to the pagoda connector 43. The pagoda connector 43 is used to connect to an external negative pressure device. The side wall of the cylinder 11 is provided with a long slot 13. The pagoda connector 43 passes through the inside of the cylinder 11 and is slidably disposed in the long slot 13, so that during the push rod 41 advances, the pagoda connector 43 can slide synchronously along the long slot 13 with the adapter 42 without being interfered with by the side wall of the cylinder 11. The pagoda connector 43 and the adapter 42 are threaded together and sealed with a sealing ring. The adapter 42 is rectangular in shape with rounded corners.

[0058] By rigidly connecting the push rod 41, the adapter 42, and the negative pressure tube 31, and making the push rod 41 and the end cap 12 form an axial sliding fit, the linearity and stability of the injection action are ensured, avoiding crystal push failure or instrument jamming due to deflection. The gas passage integrated inside the adapter 42 is connected to the pagoda connector 43 and the negative pressure tube 31, forming a complete negative pressure passage from the external negative pressure device to the negative pressure port 32, so that the adsorption function and the injection function share the same drive mechanism. At the same time, the long slot 13 set on the side wall of the cylinder 11 provides the necessary movement space for the pagoda connector 43, allowing it to slide freely throughout the injection process without structural restrictions, which ensures the reliability of the negative pressure connection and does not affect the injection stroke.

[0059] Furthermore, such as Figure 6 As shown, the negative pressure assembly 30 also includes a return spring 33; the negative pressure tube 31 is an axially extending hollow tubular structure, and a radially protruding first step 34 is provided on the outer periphery of one end near the injection assembly 40; a limiting ring 14 is provided inside the cylinder body 11, the limiting ring 14 is integrally formed or interference-fitted with the inner wall of the cylinder body 11, and the limiting ring 14 is provided with a through hole that matches the outer diameter of the negative pressure tube 31, allowing the negative pressure tube 31 to pass through and slide; the return spring 33 is sleeved on the negative pressure tube 31 and is located between the limiting ring 14 and the first step 34.

[0060] In the initial state, one end of the return spring 33 abuts against the limiting ring 14, and the other end abuts against the end face of the first step 34. The return spring 33 is in a pre-compressed or free state.

[0061] When the injection assembly 40 drives the negative pressure tube 31 to move forward to push the artificial lens, the first step 34 moves forward synchronously, compressing the return spring 33; after the injection operation is completed, the return spring 33 pushes the first step 34 and the negative pressure tube 31 to return to their original position under the action of elastic restoring force.

[0062] An elastic reset mechanism is formed by setting a first step 34 on the negative pressure tube 31 and configuring a limiting ring 14 and a return spring 33 inside the tube body 11. During injection, the return spring 33 is compressed to store elastic potential energy, ensuring that the negative pressure tube 31 is subjected to stable force. After the lens is pushed and positioned, there is no need for manual retraction; the return spring 33 can automatically drive the negative pressure tube 31 to retract and reset, avoiding interference or damage caused by prolonged retention of the instrument in the eye. In addition, the limiting ring 14 guides and limits the sliding of the negative pressure tube 31, preventing it from tilting or shaking, ensuring the stability of the negative pressure orifice 32 in the eye, thereby improving the accuracy of adsorption positioning and operational safety.

[0063] Preferred, such as Figures 1-3 As shown, the infusion assembly 20 includes a lens chamber 22 and an infusion head 23. The lens chamber 22 is a hollow tubular structure used to accommodate an artificial lens in a folded state. The rear end of the lens chamber 22 is inserted into the front opening 16 of the injection cylinder 10, and a radial seal is achieved through a sealing ring located on the inner wall of the end of the cylinder 11 or on the outer periphery of the lens chamber 22 to prevent leakage of irrigation fluid or negative pressure medium during the operation. Specifically, the lens chamber 22 is divided into upper and lower semicircles. The lower semicircle is used to place the lens, and the upper semicircle is shorter. Its outer surface has a groove corresponding to the cylinder 11 for locking, which cooperates with the cylinder 11. The infusion head 23 is fixedly connected to the front end of the lens chamber 22. The infusion head 23 has a tapered structure that is wider at the rear and narrower at the front, used for folding the lens. The front end of the infusion head 23 is a sharp corner to facilitate insertion into the cornea. Its rear end is connected to the front end of the lens chamber 22, and its inner cavity is coaxially connected with the inner cavity of the lens chamber 22 to form a continuous injection channel 21. The tip forms the output end of the artificial lens.

[0064] By connecting the lens chamber 22 to the cylinder 11 with a sealing ring, a reliable seal between the infusion assembly 20 and the injection cylinder 10 is ensured, preventing intraoperative stability issues caused by fluid leakage or negative pressure failure. This also facilitates rapid preoperative assembly or replacement of infusion assemblies 20 of different specifications. The infusion head 23 adopts a tapered structure that is wider at the back and narrower at the front, which can apply progressive compression and guidance to the artificial lens during its forward push. This allows the soft artificial lens to fold smoothly and enter the eye smoothly through the small-diameter tip, significantly reducing the need for corneal incision expansion and the risk of tissue damage. At the same time, the infusion head 23 is coaxially connected to the inner cavity of the lens chamber 22, ensuring that the lens does not get stuck in the delivery path and improving the smoothness and reliability of delivery.

[0065] Furthermore, such as Figures 2-6 As shown, the negative pressure assembly 30 also includes a plunger 35; the negative pressure tube 31 has a radially protruding second step 36 on its outer periphery near the front negative pressure hole 32, and the second step 36 is located on the rear side of the negative pressure hole 32; the plunger 35 is sleeved on the outside of the negative pressure tube 31 and abuts against the second step 36, and the second step 36 limits the plunger 35 in the axial direction. When the injection assembly 40 drives the negative pressure tube 31 to move forward, the second step 36 pushes the plunger 35 forward synchronously, so that the plunger 35 acts as the pushing end face that directly contacts the artificial lens, and smoothly pushes the artificial lens contained in the lens chamber 22 out of the inlet head 23 along the injection channel 21.

[0066] By setting a second step 36 on the negative pressure tube 31 and sleeved the plunger 35 on its outer side to form an axial limit, the plunger 35 can move forward synchronously with the negative pressure tube 31, serving as a direct pushing element for the intraocular lens. During the pushing process, the lens gradually folds and finally enters the eye through the corneal incision with a very small volume. This design avoids direct contact and friction between the tip of the negative pressure tube 31 and the lens, protecting the patency of the negative pressure orifice 32 and preventing lens damage or abnormal unfolding due to scratching by the rigid tube end. After the injection assembly 40 pushes the intraocular lens into the eye... The part with the negative pressure hole 32 at the front end also enters the eye. The artificial lens is moved in the eye by negative pressure adsorption, and the artificial lens is implanted into the designated position. Not only are the two steps of pushing and implanting the lens realized with a single surgical instrument, simplifying the existing operation, but also significantly reducing damage to the eye tissue. At the same time, the outer contour of the plunger 35 matches the inner cavity of the inlet component 20, which can provide uniform and stable thrust to the folded artificial lens, ensuring that it does not deflect, get stuck or unfold prematurely during the push process, improving the reliability and controllability of delivery.

[0067] Furthermore, the plunger 35 has a boss-type structure, with the large-diameter end of the plunger 35 facing the inlet assembly 20, and the plunger 35 is made of silicone.

[0068] The plunger 35 is designed as a large-diameter, forward-facing boss structure, and uses medical-grade elastic materials such as silicone. This allows it to apply force evenly with a soft, conforming contact surface when pushing the intraocular lens, effectively preventing scratches, deformation, or stress concentration caused by rigid components to the folded intraocular lens. Simultaneously, the elastic plunger 35 can adapt to the slight deformation of the inner walls of the lens chamber 22 and the delivery head 23, automatically compensating for gaps during delivery, improving sealing and smoothness. The small-diameter end of the plunger 35 reduces its contact with the delivery head 23, making the negative pressure tube 31 move more smoothly. Furthermore, materials such as silicone have natural lubricating properties, significantly reducing the frictional resistance between the plunger 35 and the inner wall of the delivery assembly 20, making the injection operation easier and smoother. More importantly, after the lens is released, the flexible plunger 35 will not interfere with the subsequent adsorption and positioning operation through the negative pressure hole 32.

[0069] Preferred, such as Figures 1-3 , Figure 8 As shown, a first water inlet 15 is provided on the side wall of the cylindrical body 11, and a second water inlet 24 is provided on the corresponding position on the side wall of the lens chamber 22. Both the first water inlet 15 and the second water inlet 24 are through holes, and the diameters of the first water inlet 15 and the second water inlet 24 are matched. When the lens chamber 22 is installed on the cylindrical body 11, the first water inlet 15 and the second water inlet 24 are aligned and connected. During artificial lens implantation, the first water inlet 15 and the second water inlet 24 are connected to an external irrigation system, which can continuously or intermittently inject balanced salt solution (BSS) into the eye during the operation. The water injection path is not blocked by the lens chamber 22 body, ensuring unobstructed fluid flow, maintaining intraocular pressure, and supporting the surgical space.

[0070] By setting aligned first and second water inlets 15 and 24 on the tube body 11 and lens chamber 22 respectively, the infusion component 20 automatically forms a water infusion path independent of the push channel 21 after installation, without the need for additional puncture or auxiliary irrigation instruments. This design allows the surgeon to inject balanced saline solution into the anterior chamber in real time during the intraocular lens push and subsequent negative pressure adsorption positioning process, effectively maintaining intraocular pressure stability, preventing anterior chamber collapse, and providing sufficient and safe surgical space for operation. At the same time, since the water inlets are located on the side wall and are fully connected after alignment, the water infusion process will not interfere with the lens push path or negative pressure adsorption area, avoiding lens displacement caused by liquid impact.

[0071] Specifically, the tip of the negative pressure tube 31 is rounded, allowing it to glide smoothly and without sharp edges across the corneal incision and intraocular tissues when entering the eye, significantly reducing the risk of scratching and mechanical damage to the corneal endothelium, iris, or lens capsule. The front end of the negative pressure tube 31 has a flat portion 37, and the negative pressure hole 32 is located on the flat portion 37, so that the negative pressure adsorption surface faces the location of the artificial lens. After injection, it can closely adhere to the lens surface to form a stable and concentrated negative pressure adsorption area, improving adsorption efficiency and positioning accuracy. In addition, the planar structure of the flat portion 37 helps to accurately locate the position of the negative pressure hole 32 inside the eye, making the operation more convenient.

[0072] Preferably, the cross-section of the push rod 41 is non-circular, preferably cross-shaped, elliptical, or polygonal. The end cap 12 is fixedly installed at the rear end of the injection cylinder 10, and has a non-circular opening 16 that matches the cross-sectional shape of the push rod 41. The push rod 41 cooperates with the opening 16, and the push rod 41 passes through the opening 16 of the end cap 12 and forms a sliding fit with it, so that the push rod 41 can move freely in the axial direction, but its circumferential rotation is effectively limited by the contour of the opening 16. The end of the push rod 41 away from the negative pressure tube 31 is integrally formed or fixedly provided with a pressing part 44, which is a rounded rectangular or elliptical flat plate that is easy for the fingers to apply force. A pair of wing plates 17 are fixedly provided on the outer side wall of the injection cylinder 10. The wing plates 17 are located in the middle and rear part of the injection cylinder 10 and are used for the operator to hold the instrument with the other hand to stabilize it.

[0073] By designing the push rod 41 with a non-circular cross-section and forming an anti-rotation fit with the matching opening 16 on the end cap 12, the push rod 41 is effectively prevented from rotating circumferentially during injection. This ensures that the negative pressure tube 31 and the front negative pressure hole 32 connected to it always maintain the preset spatial orientation, avoiding the impact on the positioning accuracy of the crystal due to the deviation of the adsorption direction caused by rotation. At the same time, the pressing part 44 at the end of the push rod 41 provides a comfortable and stable force application point, making it easy for the operator to accurately control the pushing stroke with one finger. With the wing plate 17 on the outside of the injection cylinder 10, the operator can hold the wing plate 17 with one hand to stabilize the instrument body and press the push rod 41 with the other hand to complete the operation, realizing the coordination of both hands and precise control, improving the stability and repeatability of the operation.

[0074] When using the integrated aspiration function intraocular lens injector of the present invention, the inlet component 20 is first removed from the front end of the injection cylinder 10, and the intraocular lens in a folded state is inserted into the lens chamber 22; then the inlet component 20 is reinstalled to the front end of the injection cylinder 10 through a snap-fit ​​structure, so that the lens chamber 22 and the cylinder body 11 are sealed together, while ensuring that the first water inlet 15 and the second water inlet 24 are aligned and connected.

[0075] During the procedure, the tip of the injector 23 is inserted into the anterior chamber of the eye through a micro-incision in the cornea. The operator holds the wing plate 17 on the outside of the injection canister 10 with one hand to stabilize the instrument, and presses the pressing part 44 of the push rod 41 forward with the other hand. Because the push rod 41 slides into the non-circular opening 16 on the end cap 12, its movement is restricted to pure axial advancement and cannot rotate, thus ensuring the stability of the negative pressure tube 31.

[0076] As the push rod 41 moves forward, it drives the negative pressure tube 31 to move forward synchronously via the adapter 42. The silicone plunger 35, fitted onto the negative pressure tube 31, abuts against the second step 36 and moves forward together with the negative pressure tube 31, gradually compressing and pushing the artificial lens from the lens chamber 22 through the posterior-wide and posterior-narrow inlet head 23 to the tip, and into the eye. During this process, the return spring 33 is compressed, storing elastic potential energy.

[0077] Once the intraocular lens is fully deployed into the eye, the negative pressure tube 31 is kept in place or slightly adjusted. The external negative pressure device is then activated. The negative pressure is transmitted through the pagoda connector 43, the internal air passage of the adapter 42, and the inner cavity of the negative pressure tube 31 to the negative pressure hole 32 on the lower surface of the front flat portion 37, creating a localized negative pressure adsorption force on the lens surface. The surgeon can then precisely traction, rotate, or position the intraocular lens to implant it in the ideal location within the capsular bag or ciliary sulcus without the need for additional instruments such as adjustment hooks.

[0078] At the same time, the infusion system connected to the water inlet continuously injects balanced salt solution (BSS) into the anterior chamber to maintain stable intraocular pressure, prevent anterior chamber collapse, and provide sufficient and safe surgical space for lens delivery, deployment, and negative pressure adsorption operations.

[0079] After implantation, release the push rod 41. The return spring 33, under the action of elasticity, pushes the negative pressure tube 31 and the plunger 35 to automatically retract and reset, avoiding the instrument from remaining in the eye for a long time.

[0080] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0081] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A synthetic lens injector with integrated aspiration function, characterized in that, The injector includes: Injector cylinder, inlet assembly, negative pressure assembly, and injection assembly; The infusion assembly is installed at one end of the injection cylinder, and an injection channel for the artificial lens to pass through is formed inside the infusion assembly; The negative pressure assembly is located inside the injection cylinder and includes a negative pressure tube. The front end of the negative pressure tube is provided with a negative pressure hole, and the rear end of the negative pressure tube is used to connect to an external negative pressure device. The injection assembly is connected to the negative pressure tube and is used to drive the negative pressure tube to move axially so as to push the artificial lens contained in the inlet assembly into the eye through the injection channel, and apply an adsorption force to the artificial lens through the negative pressure hole after the pushing is completed to assist in positioning. The injection cylinder includes a cylinder body and an end cap. The inlet assembly is installed at one end of the cylinder body, and the end cap is fixed at the other end of the cylinder body. The injection assembly passes through the end cap and extends into the interior of the cylinder body. The negative pressure assembly also includes a return spring; The negative pressure tube has a first step at one end near the injection assembly; The cylinder body is provided with a limiting ring inside, and the limiting ring is provided with a through hole for the negative pressure pipe to pass through; The return spring is sleeved on the negative pressure tube, with one end abutting the limiting ring and the other end abutting the end face of the first step. The infusion assembly includes a crystal chamber and an infusion head; The crystal chamber is a hollow tubular structure used to house an artificial lens in a folded state. One end of the crystal chamber is inserted into the end of the cylindrical body and is sealed to the cylindrical body by a sealing ring. The inlet head has a tapered structure that is wider at the back and narrower at the front. Its rear end is connected to the front end of the crystal chamber, and the tip of the inlet head forms the output end of the artificial lens. The negative pressure assembly also includes a plunger; The negative pressure pipe is provided with a second step near the negative pressure hole; The plunger is sleeved on the outside of the negative pressure tube and abuts against the second step. The plunger moves synchronously with the negative pressure tube to push the artificial lens out of the inlet assembly. The injection assembly includes a push rod, an adapter, and a pagoda connector; The adapter is fixedly connected between the push rod and the negative pressure pipe, and the adapter has an internal air passage. The push rod passes through the end cap and slides with the end cap to drive the adapter and negative pressure pipe to move axially. The pagoda connector is installed on the adapter and communicates with the air passage for connecting to an external negative pressure device. The cylinder body has a long slot on its side wall, and the pagoda connector is slidably disposed in the long slot.

2. The intraocular lens injector with integrated aspiration function as described in claim 1, characterized in that, The plunger has a boss-shaped structure, and the large-diameter end of the plunger is positioned towards the inlet assembly.

3. The intraocular lens injector with integrated aspiration function as described in claim 1, characterized in that, The side wall of the cylinder is provided with a first water inlet, and the side wall of the crystal chamber is provided with a second water inlet at the corresponding position; when the crystal chamber is installed on the cylinder, the first water inlet and the second water inlet are aligned and connected.

4. The intraocular lens injector with integrated aspiration function as described in claim 1, characterized in that, The negative pressure tube has a rounded end and a flat portion at its front end, with the negative pressure hole located on the flat portion.

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